46th week of 2008 patent applcation highlights part 18 |
Patent application number | Title | Published |
20080278043 | DRAWER LOCK MECHANISM - A drawer storage container having a plurality of lockable drawers includes a movable lock bar with a drawer catch associated with each of the lockable drawers. The lock bar is moved between an unlocked position and a locked position with an actuator that is coupled to a locking mechanism, such as for example, a key cylinder. Each drawer includes a striker mechanism that is configured to be held by the drawer catch when the lock bar is in the locked position. The actuator includes a release that allows the lock bar to be moved by the striker from the locked to the unlocked position when the striker impacts a camming surface on the catch. | 2008-11-13 |
20080278044 | DISPLAY SUPPORT APPARATUS - It is an object of the present invention to provide a display support apparatus that has a simple structure and can be stored in a small storage space. The display support apparatus includes a main leg | 2008-11-13 |
20080278045 | CASE ASSEMBLY STRUCTURE OF ELECTRONIC DEVICE - The present invention relates to a case assembly structure. The case assembly structure includes a first case and a second case. The first case has a first connection portion including an extension part and a trench from the external side to the internal side thereof. The second case has a second connection portion including a protrusion corresponding to the trench of the first connection portion of the first case. An inner wall of the extension part of the first connection portion is in contact with the external side of the second connection portion of the second case such that the first case and the second case are combined together. | 2008-11-13 |
20080278046 | Tool storage cabinet - A tool storage unit is disclosed having a cabinet structure with a plurality of surfaces defining a first interior space and a storage compartment defining a second interior space, the compartment being configured to move between an open position extending from the first interior space and a closed position retracted within the first interior space. A stationary compartment sidewall fixed within the first interior space and adjacent the storage compartment limits access to the second interior space from the first interior space when the storage compartment is in the closed position. A plurality of power outlets positioned within the storage compartment such that each is accessible from the second interior space, and a locking feature for securing the storage compartment in the closed position are also featured. Finally, a recessed area integral to the top surface, a cover hinged to the top surface and covering the recessed area, and a power outlet positioned with the recessed area is a further feature of the disclosed storage unit. A power outlet positioned on the top surface of the cabinet structure outside of the recessed area may also be provided. | 2008-11-13 |
20080278047 | MEDICINE CABINET WITH COLD STORAGE REGION - A medicine cabinet has refrigeration capability for storing sensitive bathroom items. An evaporation tray is provided to receive condensation from the refrigeration system and evaporate it to the atmosphere without disrupting ornamental characteristics. The refrigerator compartment is preferably a modular unit. | 2008-11-13 |
20080278048 | GUIDING RAIL FOR A CABINET PULL-OUT PART - A guiding rail is described with a carcass rail, fixable to a cabinet carcass, a running rail, fixable to the cabinet pull-out part, a center rail slidably connecting the carcass rail to the running rail, permitting telescopic movement of the carcass rail, the center rail, and the running rail with respect to one another from a compressed position to an extended position, a blocking device, and an operating lug disposed in a rearward end of the running rail. The blocking device includes a rod, at least one first snap-in tooth projecting from the rod, a notch lever pivotally disposed at a rearward end of the center rail, and at least one second snap-in tooth associated with the notch lever. The first and second snap-in teeth engage associated components of the guiding rail such that the guiding rail is lockable in both the extended and compressed positions. | 2008-11-13 |
20080278049 | Damper Embedded in a Home Bar Door of a Refrigerator and Method For Manufacturing Same - A refrigerator and a method for manufacturing the same are disclosed. A refrigerator according to the present includes a refrigerator body ( | 2008-11-13 |
20080278050 | Electric Lamp and Method For Mounting a Lamp Vessel in an Outer Bulb - An electric lamp comprising a substantially tubular lamp vessel, which is enclosed in a substantially tubular outer bulb, wherein the lamp vessel has current conductors extending from respective ends of the lamp vessel for providing current to an electric element inside the lamp vessel, wherein the current conductors are mounted in the outer bulb such that the lamp vessel is axially aligned in the outer bulb, and wherein at least one current conductor is mounted in the outer bulb by means of a support member comprising an at least partly circular outer support edge having an outer diameter which is substantially equal to the inner diameter of the outer bulb, characterized in that the support member comprises a substantially radially extending fixation edge on which the current conductor is fixedly mounted. | 2008-11-13 |
20080278051 | Light Signaling Device - Luminous signalling device ( | 2008-11-13 |
20080278052 | Filter and display apparatus having the same - A filter that has an excellent light room contrast, reduced double image formation, reduced external light reflection, lightweight, slim, inexpensive to produce, and a display apparatus having the filter. The filter made out of one sheet includes a reflection preventing layer arranged as the outermost layer of the filter, an electromagnetic wave shielding layer arranged on a rear surface of the reflection preventing layer and a base film arranged on a rear surface of the electromagnetic wave shielding layer. | 2008-11-13 |
20080278053 | Spark Plug - To provide a spark plug in which separation of a tip can be prevented and enough wear resistance can be obtained without increasing the content of nickel in the tip portion, and a use method of the spark plug. | 2008-11-13 |
20080278054 | Display Device, Screen Panel and Phosphor Material Composition Thereof - In an embodiment, a phosphor material composition comprises a phosphor powder and an additive, wherein the additive has an amount in a range of about 0.1%˜20% of the phosphor powder in weight. The material of the additive is selected from the group consisting of an energy absorption material and a conductive material and a combination thereof. In another embodiment, a phosphor material composition including a phosphor powder and an additive is provided, wherein the additive has an amount of 2.8 ppm˜32000 ppm. The material of the additive is also selected from the group consisting of an energy absorption material, a conductive material and a combination thereof. | 2008-11-13 |
20080278055 | PLASMA DISPLAY PANEL AND METHOD FOR PRODUCING THE SAME - A plasma display panel comprising: a front panel comprising a first substrate, a first electrode, a first dielectric layer and a protective layer wherein the first electrode is formed on the first substrate, the first dielectric layer is formed over the first substrate so as to cover the first electrode, and the protective layer is formed on the first dielectric layer; and a rear panel comprising a second substrate, a second electrode, a second dielectric layer and a phosphor layer wherein the second electrode is formed on the second substrate, the second dielectric layer is formed over the second substrate so as to cover the second electrode, the phosphor layer is formed on the second dielectric layer, wherein the front panel and the rear panel are disposed so that the protective layer and the phosphor layer are opposed to each other, and thereby a discharge space is formed between the front panel and the rear panel; characterized in that at least the first dielectric layer has a carbon concentration of from 10 | 2008-11-13 |
20080278056 | COMPACT FLUORESCENT LAMP WITH OUTER BULB - A compact fluorescent lamp having an arc tube is disclosed. The arc tube comprises: at least a first tube part and a second tube part connected to each other through a transverse connecting tube portion including a cold spot. The lamp further comprises an outer bulb enclosing the arc tube. A clip member is adapted to clip to the connecting tube portion. The clip member is for providing heat dissipation from the cold spot and for providing resilient positioning for the arc tube along a longitudinal axis of the lamp. The clip member is comprised of:
| 2008-11-13 |
20080278057 | BULB-SHAPED OUTER ENVELOPE FOR LAMPS, METHOD FOR MANUFACTURE THEREOF, AND COMPACT FLUORESCENT LAMP THEREWITH - A bulb-shaped outer envelope for accommodating at least one lamp including a light-emitting body and a control gear is disclosed. The envelope has a substantially spherical section for receiving the light-emitting body, and an elongated end section for receiving at least a part of the control gear components. The elongated end section is provided with a neck section. A substantially tubular neck-extension portion connects to an inner surface portion of and protruding from the neck section. The neck-extension portion is suitable for accommodating a remaining part of the control gear components. In a method for the manufacture of a glass outer envelope, a flare that is normally used in the manufacture of incandescent lamps is turned around by 180°, put into a skirted bulbous envelope, melted into the envelope while the skirt is detached and the flare is formed into a neck-extension portion. A self-ballasted compact fluorescent lamp with the bulb-shaped outer envelope is also disclosed. A part of the ballast components are disposed in the neck-extension portion of the outer envelope. | 2008-11-13 |
20080278058 | METHOD FOR MANUFACTURING AIRTIGHT CONTAINER, METHOD FOR MANUFACTURING IMAGE DISPLAY APPARATUS, AND AIRTIGHT CONTAINER AND IMAGE DISPLAY APPARATUS - There are disclosed methods for manufacturing an airtight container and an image display apparatus. Especially, as a constitution of supplying a potential to an electrode in the airtight container, the container is constituted which includes a structure having a concave portion opened at a through-hole of a substrate and closed at the bottom, and a shape is formed in which by applying a pressure difference between the inside and the outside of the container, the structure is deformed to enable supplying of a potential to the electrode. | 2008-11-13 |
20080278059 | ELECTRON-EMITTING DEVICE, ELECTRON SOURCE, IMAGE DISPLAY APPARATUS AND METHOD FOR MANUFACTURING ELECTRON-EMITTING DEVICE - An electron-emitting device of the present invention has an electron-emitting film, and the electron-emitting film is composed of a first layer made of a first material, and a plurality of particles made of a second material whose electric resistivity is lower than that of the first material and provided into the first layer. The first material contains oxygen and nitrogen. A method for manufacturing the electron-emitting device according to the present invention has a step of forming the electron-emitting film, and the electron-emitting film forming step includes a step of forming the plurality of particles made of a second material whose electric resistivity is lower than that of a first material into the first layer made of the first material containing oxygen and nitrogen. | 2008-11-13 |
20080278060 | FIELD-EMISSION-BASED FLAT LIGHT SOURCE - A field-emission-based flat light source includes the following: a light-permeable substrate; a plurality of line-shaped cathodes; an anode; a light-reflecting layer; and a fluorescent layer. The light-permeable substrate has a surface, and the line-shaped cathodes, with a plurality of carbon nanotubes formed and/or deposited thereon, are located on the surface of the light-permeable substrate. The anode faces the cathodes and is spaced from the cathodes to form a vacuum chamber. The light-reflecting layer is formed on the anode and faces the cathode. The fluorescent layer is formed on the light-reflecting layer. | 2008-11-13 |
20080278061 | Light Emitting Diode Module - The present invention relates to a LED module ( | 2008-11-13 |
20080278062 | METHOD OF FABRICATING ELECTRON EMISSION SOURCE, ELECTRON EMISSION DEVICE, AND ELECTRON EMISSION DISPLAY DEVICE INCLUDING THE ELECTRON EMISSION DEVICE - A method is provided for fabricating an electron emission source which can attain improved electron emission efficiency and has simplified manufacturing processes. Also provided are an electron emission display device and an electron emission display device fabricated using the method of fabricating an electron emission source. The method includes forming an electrode, forming a carbide compound thin film on the electrode and forming a carbide-induced carbon thin film layer from the carbide compound thin film using an etching gas. The electron emission device and the electron emission display device each include a first electrode, a second electrode disposed to face the first electrode, and a carbide-induced carbon thin film layer formed to be electrically connected to f the first electrode or the second electrode. | 2008-11-13 |
20080278063 | ELECTROLUMINESCENT DEVICE HAVING IMPROVED POWER DISTRIBUTION - An electroluminescent device comprising a first electrode and a second electrode having an EL unit formed there-between, wherein the EL unit comprises a light-emitting layer containing quantum dots, and the first and second electrodes define one or more light-emitting areas; wherein at least a portion of the second electrode is transparent and light emitted by the EL unit is viewed from a first side of the electroluminescent device that is nearer the second electrode; and one or more reflective elements that are electrically-conductive and are formed as part of the second electrode or in electrical communication with the second electrode; and wherein the reflective elements are located at least partially within the light emitting areas. | 2008-11-13 |
20080278064 | Light Emitting Element - It is an object of the present invention to provide a light-emitting element having a structure in which the drive voltage is relatively low. Further, it is an object of the invention to provide a highly reliable light emitting device by alleviating the stress to the light emitting layer. Further, it is another object of the invention to provide a light emitting element having a structure in which increase in the drive voltage over time is small. It is an object of the present invention to provide a display device in which the drive voltage is low and increase in the drive voltage over time is small and which can withstand long-term use. In a light emitting element, a layer in contact with an electrode serves as a hole generating layer such as an organic compound layer containing a P-type semiconductor or an electron accepting material, a light emitting layer is provided between hole generating layers, an electron generating layer is formed between the hole generation layer on the cathode side and the light emitting layer. | 2008-11-13 |
20080278065 | Organic Electroluminescent Element and Display Apparatus - An organic electroluminescent element is characterized by having a light emitting layer ( | 2008-11-13 |
20080278066 | HIGH-PERFORMANCE TANDEM WHITE OLED - A tandem OLED device having two spaced electrodes comprising: first and second light-emitting units that produce different emission spectra disposed between the electrodes, the first light-emitting unit produces light that has multiple peaks at wavelengths longer than 500 nm and substantially no emission at wavelengths shorter than 480 nm, and the second light-emitting unit produces light that has substantial emission at wavelengths shorter than 500 nm; and an intermediate connector disposed between the light-emitting units. | 2008-11-13 |
20080278067 | ELECTROLUMINESCENT DEVICE HAVING IMPROVED LIGHT OUTPUT - An OLED device including a transparent substrate having a first surface and a second surface, a transparent electrode layer disposed over the first surface of the substrate, a short reduction layer disposed over the transparent electrode layer, an organic light-emitting element disposed over the short reduction layer and including at least one light-emitting layer and a charge injection layer disposed over the light emitting layer, a reflective electrode layer disposed over the charge injection layer and a light extraction enhancement structure disposed over the first or second surface of the substrate; wherein the short reduction layer is a transparent film having a through-thickness resistivity of 10 | 2008-11-13 |
20080278068 | Method of Patterning a Thin Film - A method of patterning a thin film, comprising: depositing an intermediate, radiation sensitive, layer on a substrate; depositing the thin film on the intermediate layer, before or after deposition of the thin film: exposing the intermediate layer to patterned radiation in order to initiate a chemical reaction therein; and removing patterned radiation-defined parts of the intermediate layer and corresponding thin film, to leave patterned thin film and patterned intermediate layer on the substrate. | 2008-11-13 |
20080278069 | Light Emitting Device - By doping an organic compound functioning as an electron donor (hereinafter referred to as donor molecules) into an organic compound layer contacting a cathode, donor levels can be formed between respective LUMO (lowest unoccupied molecular orbital) levels between the cathode and the organic compound layer, and therefore electrons can be injected from the cathode, and transmission of the injected electrons can be performed with good efficiency. Further, there are no problems such as excessive energy loss, deterioration of the organic compound layer itself, and the like accompanying electron movement, and therefore an increase in the electron injecting characteristics and a decrease in the driver voltage can both be achieved without depending on the work function of the cathode material. | 2008-11-13 |
20080278070 | ORGANIC LIGHT EMITTING DISPLAY DEVICE - An organic light emitting display device having a touch panel function comprises at least one organic light emitting diode and an encapsulating thin film for encapsulating the organic light emitting diode; and an external input device formed on the display panel for generating an electric signal in response to a touch operation applied from the exterior thereof. The external input device includes an upper substrate and a spacing member. The external input device has a third electrode formed on the display panel and a fourth electrode formed on the upper substrate to intersect the third electrode. The spacing member forms a predetermined spacing between the third electrode and the fourth electrode. | 2008-11-13 |
20080278071 | ORGANIC LIGHT-EMITTING DEVICE AND METHOD OF FABRICATING THE SAME - An organic light-emitting device, comprising: a substrate; a first conductive layer formed over the substrate; at least one layer of a light-emissive organic material formed over the first conductive layer; a barrier layer formed over the at least one organic layer which acts to protect the at least one layer of organic material; and a second conductive layer, preferably a patterned sputtered layer, formed over the barrier layer. | 2008-11-13 |
20080278072 | Organic light emitting device and method of producing the same - The present invention provides an organic light emitting device that includes a first electrode, a second electrode, and at least one organic material layer that includes a light emitting layer disposed between the electrodes, and a method of producing the same wherein at least one layer of the organic material layer includes an electron transporting material and at least one selected from the group consisting of metal halides, metal oxides and organic metal and electron transporting material is the compound having the functional group selected from the group consisting of an imidazole group, an oxazole group, a thiazole group, a quinoline group and a phenanthroline group. | 2008-11-13 |
20080278073 | LOW WATTAGE FLUORESCENT LAMP - A low-wattage mercury vapor discharge fluorescent lamp is provided. The lamp has a discharge sustaining fill of mercury vapor and an inert gas having 1-100 mole % xenon, balance comprising a rare gas or rare gas mixture, such as krypton or argon. The fill gas has a total pressure of 0.5-4 torr, and the lamp being adapted to operate below 10 watts per foot of arc length. | 2008-11-13 |
20080278074 | Gas Discharge Display Panel - Provided is a gas discharge display panel that exhibits a favorable display performance by maintaining a wall charge retaining power, controlling discharge delay within a range adequate for optimal image display, and reducing the discharge starting voltage at comparatively low cost. Also provided is a PDP that exhibits more reliability with enhanced display quality by further improving the secondary electron emission factor γ compared to conventional cases and lowering the discharge starting voltage to widen the driving margin. Further provided is a manufacturing method of a gas discharge display panel, by which the manufacturing cost lowers by reduction of the exhaustion time in the sealing exhaustion process, and by which the driving circuit cost is reduced. In a gas discharge display panel of the present invention, a protective layer ( | 2008-11-13 |
20080278075 | Plasma Display Panel - A plasma display panel is disclosed. The plasma display panel includes a substrate, a plurality of electrodes positioned on the substrate, a dielectric layer covering the plurality of electrodes. A height of the electrode around a central axis of a cross section of the electrode is larger than a height of the electrode at an edge of the cross section of the electrode. | 2008-11-13 |
20080278076 | Filter and plasma display apparatus including the same - A filter which provides an excellent lightroom contrast by reducing external light reflection and a display apparatus including the same. The filter may be easily manufactured at low cost. The filter may be formed in a single sheet and may include a base film, a plurality of beads formed of a visible light-transmitting material disposed on a front surface of the base film, and a colored binder layer fixing the beads to the base film. | 2008-11-13 |
20080278077 | Metal Halide Lamp - A metal halide lamp comprising a discharge vessel surrounded by an outer envelope with clearance and having a ceramic wall which encloses a discharge space filled with a filling comprising an inert gas, such as xenon (Xe), and an ionizable salt, wherein in said discharge space two electrodes are arranged whose tips have discharge path between them, with the special feature that said ionizable salt comprises NaI, TlI, CaI | 2008-11-13 |
20080278078 | Metal Halide Lamp, Metal Halide Lamp Lighting Device, and Headlight - There are provided a mercury-free metal halide lamp which suppresses occurrence of flickering of light emission, and is improved in light flux rising immediately after starting, and more practical and suitable for a headlight, and a metal halide lamp lighting device and a headlight using this. | 2008-11-13 |
20080278079 | Solid-state illumination lamp structure - A solid-state illumination lamp structure includes a sleeve, a first electrode, a second electrode and a light-emitting assembly. The first electrode is mounted on one end of the sleeve and the second electrode is mounted on the other end of the sleeve. The light emitting assembly is mounted inside the sleeve and includes a circuit substrate, at least one light-emitting diode and two conducting assemblies. The two conducting assemblies are electrically connected to the first electrode and the second electrode, respectively, so that the light emitting assembly emits light. | 2008-11-13 |
20080278080 | Ballast With Filament Heating And Ignition Control - A ballast ( | 2008-11-13 |
20080278081 | SIGNALING MODULE, LIQUID CONTAINER, RECORDING APPARATUS, AND CONTROL METHOD - An ink tank receives data signals from a printer and an LED provided on the ink tank is driven on the basis of the received data signals. The LED is driven in an inactive time period that is different from the time period in which the date signals are input to the ink tank. | 2008-11-13 |
20080278082 | PLASMA DISPLAY DEVICE AND METHOD FOR DRIVING THE SAME - There is provided a method for driving a plasma display device characterized by including a first step of turning off first and fourth switching devices and turning on second and third switching devices, a second step of turning on the first switching device and turning off the second to the fourth switching devices after the first step and a third step of turning on the first and the fourth switching devices and turning off the second and the third switching devices after the second step. | 2008-11-13 |
20080278083 | Circuit Arrangement - A ballast circuit receiving power from the mains and supplying a high frequency lamp current to a lamp is equipped with means to generate both a common mode current and a differential mode current through the mains supply terminals. Both these currents are phase shifted 180 degrees with respect to the lamp current. In this way currents induced in the mains supply terminals by means of parasitic capacitive coupling and magnetic coupling between conductors carrying the lamp current and the mains supply terminals are cancelled. | 2008-11-13 |
20080278084 | LED LAMP SET APPARATUS - The present invention relates to a LED lamp set apparatus, comprises a gas discharge tube and a LED connected in series, the gas discharge tube is a neon tube, an argon tube, a helium tube or a krypton tube, or a gas tube in which the other inert gases is filled or is filled with a mixture of inert gases. When operating the LED lamp set apparatus provided by the present invention, a public AC power source can be directly input to the LED lamp set apparatus for lighting the LED, needless of an inverter; for protecting the LED, the LED lamp set apparatus can be connected in series with a current-limiting resistance, or the public AC power source can be input to a rectifying diode or a bridge rectifier for processing a rectifying operation and then input to the LED lamp set apparatus; a plurality of the LED lamp set apparatuses can be connected in parallel; or the LED lamp set apparatus can be integratedly-packaged and is inserted to a connector. | 2008-11-13 |
20080278085 | Program Start Ballast - A ballast ( | 2008-11-13 |
20080278086 | Electronic ballast having a boost converter with an improved range of output power - A boost converter for an electronic dimming ballast for driving a gas discharge lamp has an increased output power range. The boost converter operates in discontinuous conduction mode when a desired intensity of the lamp is below a first threshold intensity, and operates in critical conduction mode when the desired intensity is above a second threshold intensity. The boost converter comprises a delay circuit for introducing an amount of delay into the conduction of current through the boost converter. A control circuit of the ballast is operable to drive the delay circuit and thus control the operation of the boost converter in response to the desired intensity of the lamp. The control circuit is further operable to drive the delay circuit with a pulse-width modulated signal to provide multiple amounts of delay into the operation of the boost converter. | 2008-11-13 |
20080278087 | Pulse Width Modulation Apparatus and Apparatus for Driving Light Source Having the Same - Provided are a pulse width modulation (PWM) apparatus and a light source-driving apparatus including the PWM apparatus. The PWM apparatus includes a voltage division part, a capacitor part, a first operational amplifier, a first noise reduction part, and a second operational amplifier. The voltage division part divides and outputs an input voltage. The capacitor part charged by an input current or discharged for provides a charge voltage. The first operational amplifier operates according to a result of comparing a divided voltage output from the voltage division part with the charge voltage output from the capacitor part. The first noise reduction part removes a high frequency noise of the divided voltage. The second operational amplifier converts a signal generated from the capacitor part into a pulse width modulation signal by a dimming control signal. | 2008-11-13 |
20080278088 | Ballast With Ignition Voltage Control - A ballast ( | 2008-11-13 |
20080278089 | ACTIVE LAMP CURRENT CREST FACTOR CONTROL - Ballasts with crest factor control are provided. During a transition to a given half cycle steady state, the current provided to reach the steady state is varied, such as turned off for a short period. This reduction during the transition may reduce or eliminate overshoot. The crest factor control is active, such as altering the timing or number of on/off/on switchings used to control crest factor. The active control may be based on any information, such as time, lamp voltage feedback, or other lamp dependent feedback. | 2008-11-13 |
20080278090 | Reset Circuit for Power-On and Power-Off - A circuit for resetting a display having at least one driver outputting a driving voltage through an output channel to a corresponding data line of a panel comprises a first switch and a second switch. The first switch is actuated by a control pulse to transfer a reset voltage to the data line of the panel. The second switch is actuated by the control pulse to electrically isolate the output channel of the driver from the data line of the panel, wherein the control pulse is asserted during transient periods resulting from power-on and power-off of the display. | 2008-11-13 |
20080278091 | Method and Circuit for Driving Back a Light Emitter of a Display Apparatus - A back light emitter ( | 2008-11-13 |
20080278092 | HIGH POWER FACTOR LED-BASED LIGHTING APPARATUS AND METHODS - Power control methods and apparatus in which a switching power supply provides power factor correction and an output voltage to a load via control of a single switch, without requiring any feedback information associated with the load. The single switch may be controlled without monitoring either the output voltage across the load or a current drawn by the load, and/or without regulating either the output voltage across the load or the current drawn by the load. The RMS value of an A.C. input voltage to the switching power supply may be varied via a conventional A.C. dimmer (e.g., using either a voltage amplitude or duty cycle control technique) to in turn control the output voltage. The switching power supply may comprise a flyback converter configuration, a buck converter configuration, or a boost converter configuration, and the load may comprise an LED-based light source. | 2008-11-13 |
20080278093 | Backlight module with light tubes and liquid crystal display with same - An exemplary backlight module ( | 2008-11-13 |
20080278094 | Method for Driving a Lamp in a Lighting System and a Control Apparatus for Driving Such Lamp - A method and a control apparatus for driving a lamp ( | 2008-11-13 |
20080278095 | COMPACT FLUORESCENT LAMP WITH OUTER ENVELOPE AND METHOD FOR MANUFACTURING - A compact fluorescent lamp comprises a discharge tube arrangement with at least one discharge tube. The tube is formed of glass, encloses a discharge volume filled with a discharge gas and has a fluorescent phosphor coating disposed on the inner surface of the tube. The tube forms a continuous arc path and is provided with electrodes disposed at each end of the arc path. The lamp also comprises a ballast circuit mounted on a printed circuit board, which is oriented in a plane substantially parallel to the principal axis of the lamp. The ballast circuit is connected to the electrodes by lead-in wires and to a supply voltage by lead-out wires and controls the current in the tube. A bulb shaped outer envelope has a substantially spherical portion enclosing at least a part of the tube arrangement and an elongated end portion enclosing at least the ballast circuit. The end portion of the outer envelope having an open end on a base side is closed and terminated by a closing means of a material compatible with the material of the outer envelope. The ballast circuit and the discharge tube arrangement are held within the outer envelope and relative to each other in a predetermined position by a holding and protecting shield being oriented in a plane substantially perpendicular to the principal axis of the lamp and comprising a receiving and fixing portion for the discharge tube and the printed circuit board of the ballast circuit. | 2008-11-13 |
20080278096 | Configurable Ballast - A configurable ballast ( | 2008-11-13 |
20080278097 | Systems and Methods for Controlling a Solid State Lighting Panel - Provided are systems and methods for controlling a solid state lighting panel. A system according to some embodiments of the invention includes a controller that provides control signals to current drivers that are configured to provide current to multiple solid state lighting devices. The system also includes a sequence generator that generates a firing sequence for firing multiple strings of slid state lighting devices. | 2008-11-13 |
20080278098 | LIGHT EMITTING DIODE DRIVE CIRCUIT - A drive circuit includes a constant voltage circuit to supply a constant voltage to one terminal of a load, a constant current circuit to supply a predetermined constant current to another terminal of the load in accordance with a pulse signal input externally, and a first reference voltage generator to generate and output a first reference voltage in accordance with an output voltage at an output terminal of the constant current circuit. The constant voltage circuit controls so that the first reference voltage is proportional to the output voltage output to the load. | 2008-11-13 |
20080278099 | Controlling electroluminescent panels in response to cumulative utilization - An electronic device includes a light source, which generates light in response to a signal, and a controller. Because the luminosity of the light source decays over time, the controller generates a utilization value based on a cumulative time that the light source is emitting light, and regulates the signal that is provided to the light source in response to the utilization value to at least partially compensate for decay in the luminosity of the light source. | 2008-11-13 |
20080278100 | Lighting System Using Gps Receiver - A lighting system using a GPS receiver is provided. The lighting system includes: a GPS receiver for calculating sunrise time and sunset time from an inputted GPS signal and outputting an on/off signal and a satellite detection indicating signal according to the calculated sunrise time and sunset time; a security light configured to be turned on/off in response to the on/off signal; and an LED configured to be turned on/off in response to the satellite detection indicating signal. Accordingly, the GPS receiver itself receives GPS satellite signal, sunrise time and sunset time are automatically calculated from the received position information and reception information by using a baseband processor, and a security light is turned on/off at the calculated sunrise and sunset time, so that the number of components is greatly reduced. | 2008-11-13 |
20080278101 | CONTROL SYSTEMS AND METHODS FOR PERMANENT MAGNET ROTATING MACHINES - Systems and methods for controlling a rotating electromagnetic machine. The rotating machine, such as a permanent magnet motor or hybrid switched reluctance motor, includes a stator having a plurality of phase windings and a rotor that rotates relative to the stator. A drive is connected to the phase windings for energizing the windings. A controller outputs a control signal to the drive in response to inputs of demanded torque, rotor position and/or speed. Control methods include calculating a scaled torque demand from the received torque demand to obtain substantially constant torque over a range of motor speeds, calculating an optimal dr-axis injection current using a cost function and a starting method that switches from speed control mode to torque control mode at a predetermined rotor speed or at predetermined start-up timing intervals. | 2008-11-13 |
20080278102 | ROTARY ELECTRIC SYSTEM DESIGNED TO UTILIZE ZERO-PHASE CIRCUIT - In a rotary electric system, a rotary electric machine is provided with an armature core and star-connected multiphase windings with a neutral point wound in the armature core. Each of the star-connected multiphase windings has a predetermined winding configuration that prevents, when a zero-phase current is supplied from a direct current power source to the star-connected multiphase windings via the neutral point, a zero-phase magnetic flux created in the armature core based on the zero-phase current flowing in each phase winding of the star-connected multiphase windings from being cancelled out by a zero-phase magnetic flux created in the armature core based on the zero-phase current flowing in another one phase winding of the star-connected multiphase windings. | 2008-11-13 |
20080278103 | MOTOR CONTROL DEVICE - The present invention is a motor control device comprising a control system, the control system being capable of controlling the motor by PWM and having integration means being capable of outputting an integrated value obtained by integrating a deviation between a rotation speed and a target rotation speed of a motor, the motor control device being capable of starting control with the control system for causing the motor to rotate at the target rotation speed after rotation of the motor has been started. In this motor control device, an output value of the integration means at a time when control with the control system is to be started is set to have a value that corresponds to a counter electromotive force generated in the motor by its rotation. | 2008-11-13 |
20080278104 | CONTROL CIRCUIT OF SENSORLESS MOTOR AND CONTROL METHOD THEREOF - A control circuit of a sensorless motor includes a first coil, a second coil, a first switch circuit, a second switch circuit and an auxiliary switch circuit. The first switch circuit is electrically connected to the first coil and controls a direction of a current flowing through the first coil. The second switch circuit is electrically connected to the second coil and controls a direction of a current flowing through the second coil. The auxiliary switch circuit is electrically connected to and between the first coil and the second coil and controls the directions of the currents flowing through the first coil and the second coil by cooperating with the first switch circuit and the second switch circuit. A control method of a sensorless motor is also disclosed. | 2008-11-13 |
20080278105 | ROBOTIC MANIPULATOR USING ROTARY DRIVES - A two degree-of-freedom positioning and manipulating apparatus is provided. The apparatus includes a first driven member rotatable about a first driven axis, a first driver member coupled to a first driven member for rotating the first driven member about the first driven axis, and a link member fixedly connected to the first driven member. The apparatus further includes a second driven member rotatably mounted to the link member for rotating about a second driven axis, with the second driven axis generally parallel to the first driven axis, and a second driver member coupled at a drive point to the second driven member for rotating the second driven member about the second driven axis. The drive point is generally coincident with the first driven axis. | 2008-11-13 |
20080278106 | APPARATUS, SYSTEM, AND METHOD FOR SIMULATING OUTPUTS OF A RESOLVER TO TEST MOTOR-RESOLVER SYSTEMS - An apparatus, system, and method are provided for simulating outputs of a resolver. One apparatus includes an adjustable sine waveform generator for simulating first and second sine wave signals, and an adjustable cosine waveform generator for simulating first and cosine wave signals. The apparatus also includes an adjustable waveform generator and an adjustable gain circuit coupled to the sine waveform generator and cosine waveform generator. The system includes a device simulating a resolver coupled to a motor controller. The device includes an adjustable sine waveform generator and an adjustable cosine waveform generator coupled to an adjustable waveform generator and an adjustable gain circuit. One method includes transmitting a signal simulating at least one resolver fault condition to a motor controller to determine if the motor controller detects the fault condition(s). If the motor controller fails to detect the fault condition(s) and/or transmit an error message, the motor controller is malfunctioning. | 2008-11-13 |
20080278107 | MOTOR DRIVE DEVICE, IMAGE READING DEVICE, IMAGE FORMING APPARATUS, AND MOTOR DRIVE METHOD - A motor drive device drives a stepping motor having a rotor mounted on a rotating shaft with a capability of making a transition between a plurality of excitation modes. A motor control unit drives the stepping motor by controlling the rotor to move to a position corresponding to an excitation modes. A stop control unit controls, when stopping the stepping motor, a stop of the rotor at a position to which the rotor is moved by the motor control unit common to the excitation modes after the stop of the rotor is issued. | 2008-11-13 |
20080278108 | MOTOR AND METHOD FOR CONTROLLING OPERATION OF MOTOR - A self-magnetizing motor incorporates a control circuit that starts the motor, controls a magnetizing unit, and then operates the motor. The control circuit can include relay, such as a bi-directional conductive power semiconductor device, and one or more PTC (Positive Temperature Coefficient) switches. This control circuit eliminates the need for a separate controller and the implementation costs can be reduced. | 2008-11-13 |
20080278109 | System and Method for Controlling Input Line Harmonics in a Motor Drive - A motor drive system is disclosed that includes a power input configured to receive alternating current (AC) power and a rectifier having a switching frequency selected to convert the AC power to direct current (DC) power. The motor drive unit also includes an input filter circuit connected between the power input and the rectifier and configured to suppress frequency harmonics across a range of harmonics. Additionally the motor drive unit includes a block filter circuit connected between the power input and the rectifier and configured to substantially block frequency harmonics associated with the switching frequency of the rectifier. Furthermore, the motor drive unit includes an inverter configured to receive the DC power from the rectifier and convert the DC power to a series of pulses configured to drive a motor. | 2008-11-13 |
20080278110 | Multi-functional power supply device and operating method thereof - A multi-functional power supply device comprises: a secondary cell, a charging circuit, a controller, and a first connection unit. The secondary cell is used to store electrical energy, and produces a first voltage and a second voltage. When the first connection unit is electrically connected to a solar board, the charging circuit receives the electrical energy which is transformed from the solar board and is then stored in the secondary cell. The controller controls the second voltage to produce at least one output voltage to an application apparatus. Moreover, when the first connection unit changes to connect with a lighting device, the secondary cell provides the first voltage to the lighting device directly. Hence, the present invention provides power to the application apparatus, and produces a light source through the lighting device at the same time. | 2008-11-13 |
20080278111 | Method for charging a battery of an autonomous system - In an autonomous system, the method for charging a power storage element from a generator comprises temperature measurement, with switching from a first charging mode to a second charging mode in which the voltage is regulated by the temperature. The first charging mode is charging at regulated current to a maximum current value which is a function of the state of charge of the power storage element and of the temperature of the power storage element. Switching is performed when the voltage at the terminals of the power storage element reaches a preset threshold value, itself a function of the value of the current and temperature of the power storage element. | 2008-11-13 |
20080278112 | Auxiliary Winding for Improved Performance of a Planar Inductive Charging Platform - A battery charging apparatus comprises an inductive charging platform including a charging surface on which an electrical device to be charged is to be placed, and a first winding for generating lines of magnetic flux generally perpendicular to the charging surface. To compensate for voltage sag caused by a reduction in the flux generated by the first winding, a second winding is located within an area defined by the first winding for generating an auxiliary magnetic flux generally perpendicular to the charging surface. | 2008-11-13 |
20080278113 | Structure for Linking Battery Charger And Storage Unit - A structure for linking battery charger and storage unit device during recharging is provided. The battery charger is for recharging mobile phones and the storage unit is a leather bag, container, and so on. The linking structure includes an engaging element and a linking element. The engaging element is on the surface of the linking structure to engage tot eh surface of the battery charger. The linking structure is a reusable attaching structure that can be attached to the storage unit. The linking element has the same structure as the linking element on the storage unit so that the present invention will hang the storage unit for storing the mobile phone below the battery charger during recharging. | 2008-11-13 |
20080278114 | Adjusting method of battery pack and adjusting method of battery pack with controller - The invention provides a method of adjusting a battery pack capable of reducing a difference in charge level between a plurality of secondary batteries constituting the battery pack and capable of restraining an increase in battery voltage difference between the secondary batteries of the battery pack in association with the adjustment of the charge level. A method of adjusting a battery pack includes a first adjusting process for discharging all secondary batteries of a first battery group so that charge levels of the secondary batteries of the first battery group fall within a charge level range determined based on a charge level of a secondary battery of a second battery group and further a second adjusting process for discharging all the secondary batteries of the first and second battery groups by the same electric quantity respectively. | 2008-11-13 |
20080278115 | Battery Management System - A battery management system for use with one or more cells comprising the system having one or more battery monitor and programmable logic which is connected to the one or more battery monitor to modify its battery operation and report battery status. The programmable logic may be configured to analyse physical data relating to the effect of temperature on battery capacity and/or the effect of temperature on battery self discharge current. Implementation is applicable to all electrical energy storage systems that comprise series or parallel connected electro chemical storage elements. This includes Super or Ultra Capacitor's, fuel cells, NiMH, NiCd, Pb & Lithium Chemistry battery packs. | 2008-11-13 |
20080278116 | Battery protective device and semiconductor integrated circuit device - A battery protective device that protects against battery damage and semiconductor destruction from overdischarge and overcharge of the battery. Resistance across switching elements is controllable to prevent current leakage through parasitic dipole elements in the integrated circuit. Current is detected with an overdischarge detecting circuit and an overcharge detecting circuit. Direction of the current to/from the battery is detected by discharge overcurrent and charge overcurrent detecting circuits. Switching discharge FETs and charge FETs are enabled as independently controlled, ON-OFF parallel switching elements, interposed in series in the charge/discharge current path of the battery. Only a part of the discharge or charge switching FETs can be turned ON and OFF for accurate current control in accordance with the detected current and its direction. | 2008-11-13 |
20080278117 | SIMPLIFIED AUTOMATIC DISCHARGE FUNCTION FOR VEHICLES - Methods and system are disclosed for an automatic discharge function for a vehicle having an electric or hybrid electric motor. The methods and system monitor the motor for occurrence of a power shutdown. If the power shutdown occurs, a contactor pair is opened, and immediate discharging of capacitance is initiated in response to opening the contactors pair. Discharging is continued until the capacitance is completely discharged. | 2008-11-13 |
20080278118 | Method for charging a storage element of an autonomous system - The charging method comprises limiting, according to the temperature, of the power supplied to the storage element to a charging setpoint power. The energy required to charge the storage element is determined and the period during which the power resource will be available is estimated. A theoretical mean power is calculated by means of these two items of information. The progressions of the temperature and of a maximum acceptable power are estimated. A maximum energy able to be delivered by the generator is calculated from the maximum acceptable power. The value of the charging setpoint power is defined by comparison of the required energy with the maximum energy and by comparison of the mean power with the maximum acceptable power. | 2008-11-13 |
20080278119 | BATTERY CHARGER FOR A HANDHELD COMPUTING DEVICE AND AN EXTERNAL BATTERY - A battery charger includes a power source for supplying a primary charge current to a first battery, and a charge manager for charging a second battery. The charge manager is coupled to the power source and is configured to charge the second battery with a secondary charge current in accordance with a continuous comparison between a predefined maximum current limit and a total current drawn from the power source. | 2008-11-13 |
20080278120 | GENERATOR CONTROL SYSTEM AND METHOD AND VEHICLE INCLUDING SAME - An internal combustion engine, battery and charging system therefore including a generator particularly adapted for use in straddle ridden vehicles and wherein the charging system for the battery and operating electrical accessories of the engine wherein the charging is regulated in response to sensed conditions of the engine operation and the electrical devices therefor. | 2008-11-13 |
20080278121 | Electrical Energy Transmission Device - An electrical energy transmission device has phase conductors, which carry alternating current and have transfer impedance, and sheathed conductors, which are inductively coupled to the phase conductors. A first end and a second end of each sheathed conductor form a sheath circuit with a reactance. An electronic assembly for changing the impedance of the sheath circuit is provided. The electrical energy transmission device can be used flexibly given different demands placed on the energy transmission. The electronic assembly is also configured to increase the transfer impedance. | 2008-11-13 |
20080278122 | Apparatus and method for termination powered differential interface periphery - An apparatus and method for supplying power to the peripheral circuits of a transmitter circuit, especially an HDMI transmitter circuit, is disclosed. In an HDMI transmitter the termination resistors of the output driver are part of the receiver. DC power for the driver is supplied through these termination resistors. In prior art implementations of circuits this power, supplied by the receiver circuit, is wasted in the DC set-up circuit of the differential line driver. It is suggested to use this wasted power from the remote termination to power selected peripheral circuits of the transmitter. The use of this wasted power in the line driver for powering the peripheral circuits reduces the total system power. | 2008-11-13 |
20080278123 | Switching regulator circuit, system, and method for providing input current measurement without a dedicated input current sense element - A synchronous regulator includes a controller coupled to receive a reference signal and a feedback signal from the regulator operable to provide a pulse width modulation (PWM) signal at its output. The regulator includes at least one gate driver coupled to receive the PWM signal, and a synchronous output switch having a phase node there between controlled by the gate driver, and regulator input current measurement circuitry. The regulator input current measurement circuitry comprises a circuit operable for providing a signal representative of at least one phase node timing parameter, a sensing circuit operable for sensing inductor or output current provided by the regulator, and a calculation circuit coupled to receive the signal representative of the phase node timing parameters and the inductor or output current and is operable to determine the input current. | 2008-11-13 |
20080278124 | METHOD AND CIRCUIT FOR GENERATING OUTPUT VOLTAGES FROM INPUT VOLTAGE - A power supply circuit that accurately generates output voltages with the same regulator includes a regulator for generating a first output voltage from an input voltage. A first switch circuit, connected to the regulator, selectively outputs the first output voltage of the regulator as a second output voltage from the power supply circuit. A pre-charge circuit, connected to the regulator and the first switch circuit, generates the second output voltage from the input voltage before the first output voltage of the regulator is output as the second output voltage while controlling the first switch circuit. | 2008-11-13 |
20080278125 | APPARATUS FOR OPTIMIZING DIODE CONDUCTION TIME DURING A DEADTIME INTERVAL - Deadtime optimization techniques and circuits are provided which implement closed loop feedback to reduce a duration of a deadtime interval by reducing a diode conduction time (DCT) to an optimized or minimized value. Information regarding DCT is fed back to continuously adjust the relative delay between a first driver path which drives a first transistor and a second driver path which drives a second transistor. For instance, information regarding DCT can be measured and stored, and then used to generate a control signal which continuously adjusts (e.g., increases or decreases) a variable delay associated with a delay element in one of the driver paths of one of the transistors. The delay is adjusted to a value which drives the DCT towards an optimum value. By continuously changing the relative delay between the first driver path and the second driver path, the DCT can be driven to an optimum value | 2008-11-13 |
20080278126 | VOLTAGE DOWN CONVERTER - A voltage down converter includes a voltage comparator for comparing a first reference voltage and an internal voltage to provide a first driving signal; a driving signal controller coupled with the voltage comparator, the driving signal controller configured to generate a second driving signal in response to an external voltage and selectively providing any one of the first and second driving signals; and a voltage supply coupled with the driving signal controller, the voltage supply configured to receive the selectively provided first and second driving signals, wherein the voltage supply is activated in accordance with the first or second driving signal, thereby providing the internal voltage. | 2008-11-13 |
20080278127 | Constant-Voltage Power Supply Circuit with Fold-Back-Type Overcurrent Protection Circuit - A constant-voltage power supply circuit for converting an input voltage applied to an input terminal into a predetermined constant voltage for output from an output terminal includes an output transistor to supply from the input terminal to the output terminal an output current responsive to an applied control signal, an error amplifying circuit unit to receive a predetermined bias current to control an operation of the output transistor, and a bias current adjusting circuit unit to supply the error amplifying circuit unit with the bias current responsive to the output current output from the output transistor, wherein the bias current adjusting circuit unit is configured to suspend the supply of the bias current to the error amplifying circuit unit in response to lowering of the output voltage to a predetermined voltage. | 2008-11-13 |
20080278128 | CONTROL CIRCUIT FOR STEP-DOWN DC-DC CONVERTER, STEP-DOWN DC-DC CONVERTER AND CONTROL METHOD THEREOF - To provide a control circuit of a step-down DC-DC converter, a step-down DC-DC converter and a control method thereof which can prevent overshoot and production of a through current flowing to a main switching transistor and a synchronous rectifier transistor by adopting a simple circuit configuration. The control circuit of the step-down DC-DC converter in which a main switching transistor M | 2008-11-13 |
20080278129 | SWITCHING REGULATOR CAPABLE OF PREVENTING REVERSE CURRENT - A switching regulator includes a first switch, an inductor, a second switch, a control circuit to control a switching operation by switching the first switch and switching the second switch complementally to the first switch, a reverse current protection circuit to shut off a current through the second switch to prevent a reverse current from an output terminal toward the second switch, and a soft-start circuit to cause the control circuit to perform a soft-start operation in which the output voltage is being increased gradually during a time period from a start-up to a predetermined elapsed time. The soft-start circuit causes the reverse current protection circuit to stop a shutoff operation of the current through the second switch when a generation or an indication of the reverse current is detected during the soft-start operation instructed by the control circuit. | 2008-11-13 |
20080278130 | RESONANCE TYPE ELECTRIC POWER CONVERSION APPARATUS AND METHOD - A resonance type electric power conversion apparatus which includes a main circuit including a main reactor, a main switching device, an inverse-parallel diode and an output power diode, and an auxiliary circuit including an auxiliary reactor, an auxiliary switch, and an auxiliary capacitor connected in parallel to the main switching device for forming a recovery current elimination circuit and a partial resonance circuit for discharging charge accumulated in the auxiliary capacitor to turn on the inverse-parallel diode, includes recovery current elimination period calculation means for calculating a recovery current elimination period after the present point of time until the current flowing through the output power diode becomes zero and the charge of the output power diode disappears based on a voltage value across the auxiliary reactor, a current value of the main reactor and an inductance value of the auxiliary reactor, and control means for controlling the auxiliary switching device to turn on based on the recovery current elimination period. | 2008-11-13 |
20080278131 | Switching mode power supply and driving method thereof - A switching mode power supply includes: a power supply unit that comprises a switch that is coupled to a primary coil at a primary side of a transformer for converting an input DC voltage, and that supplies power to a secondary coil and a tertiary coil at a secondary side of the transformer according to an operation of the switch; a switching controller that receives a feedback voltage corresponding to a first voltage generated in the secondary coil at the secondary side of the transformer, and receives a detection signal corresponding to a current flowing to the switch to control an on/off operation of the switch; and a feedback signal generator that receives the first voltage and the switching control signal, samples the first voltage by using first pulse strings, and generates the feedback voltage according to a level of the first voltage sampled by a first pulse in the first pulse strings, wherein a toggling time of the first pulse strings is changed in a first period for sampling the first voltage, and a time for sampling the first voltage is changed. | 2008-11-13 |
20080278132 | Digital Compensation For Cable Drop In A Primary Side Control Power Supply Controller - The present invention is a system and a method that uses primary side sensing to regulate the output voltage at a cable end without any remote sensing of cable connections back from the load. This is accomplished by approximating the current from the control voltage in the control loop through the relationship that defines the Ton time in terms of the control voltage Vc. Once the approximation of the output current is known, it is multiplied by a known fixed cable resistance, and this value is subtracted from the feedback sensor output before it is subtracted from the digital reference. This forces the regulator to raise the output voltage by the amount of drop across the cable, causing the output of the cable to be maintained at the targeted regulation point. | 2008-11-13 |
20080278133 | IRREGULAR VOLTAGE DETECTION AND CUTOFF CIRCUIT USING BANDGAP REFERENCE VOLTAGE GENERATION CIRCUIT - An irregular voltage detection and cutoff circuit using a bandgap reference voltage generation circuit includes the bandgap reference voltage generation circuit, which generates a bandgap reference voltage from the power-supply voltage, a reference voltage generator, which generates a first reference voltage and a second reference voltage in the same voltage level as the bandgap reference voltage from the power-supply voltage, a voltage detector, which generates a detection voltage from the power-supply voltage, and a comparator, which generates a switching control signal that cuts off the power-supply voltage by comparing the first and second reference voltages with the detection voltage. | 2008-11-13 |
20080278134 | SWITCHING POWER SUPPLY DEVICE - The present invention provides a switching power supply device including a switching element, a control circuit controlling the switching element, a transformer having an auxiliary winding, a potential clamp circuit connected to one of outputs of the transformer, a delay capacitor connected to an output of the potential clamp circuit, a potential detection circuit detecting a potential at the delay capacitor, and an overload protection actuation circuit realizing overload protection. During an overload, the delay capacitor is charged only by ringing of the auxiliary winding, generated immediately after the switching element is turned off, through the potential clamp circuit. Then, the potential detection circuit supplies an actuation signal to a latch stop circuit by detecting that the potential at the delay capacitor rises. The latch stop circuit latches and stops the switching operation of the switching element to realize the overload protection when the actuation signal is fed into the latch stop circuit. Thus, the overload protection can be realized with a sufficient delay time by the relatively small delay capacitor. | 2008-11-13 |
20080278135 | BOOTSTRAP CLAMPING CIRCUIT FOR DC/DC REGULATORS AND METHOD THEREOF - A clamping circuit of a DC/DC regulator includes a reference current generator to generate a reference current. The reference current can be based upon a specified maximum voltage across a bootstrap capacitor of the DC/DC regulator. The clamping circuit also includes a current generator that generates a current based on the voltage across the bootstrap capacitor. The current generated by the current generator is compared to the generated reference current. Based on the comparison, the voltage across the bootstrap capacitor is regulated. By regulating the voltage across the bootstrap capacitor based on current, rather than based directly on the voltage across the capacitor, the design of the clamping circuit is simplified compared to voltage-based implementations. | 2008-11-13 |
20080278136 | Power supplies for RF power amplifier - Switched-mode power supplies (SMPSs) and their control methods for radio frequency (RF) power amplifiers in battery-powered wireless transmitter devices involve a Boost-type SMPS and a Buck-type SMPS in cascade connection which are controlled so that high efficiency is maintained for various loads and transmission power levels. The Boost SMPS and the Buck SMPS can be controlled based on the mode of operation of the transmitter, such as the actual battery voltage, the needed output power, the selected frequency band, the selected RF power amplifier (PA), the selected modulation method of the transmission signal, and/or the selected PA voltage control method, such as the envelope elimination and restoration (EER) technique, the envelope tracking (ET) technique, or the power-level tracking (PT) technique. | 2008-11-13 |
20080278137 | CIRCUITS AND METHODS TO PRODUCE A VPTAT AND/OR A BANDGAP VOLTAGE - Provided herein are circuits and methods to generate a voltage proportional to absolute temperature (VPTAT) and/or a bandgap voltage output (VGO). A circuit includes a group of X transistors. A first subgroup of the X transistors are used to produce a first base-emitter voltage (VBE | 2008-11-13 |
20080278138 | High accuracy constant-off average output current control scheme - A high accuracy constant-off average output current control is provided. It is composed of the reference block generates preset reference and converts the reference signal into a suitable format; the state detecting block, the state variables of switching power converter are detected and the detected signals are converted into the same signal format as one of output from reference block; The error-zero detector is used to detect the error between the outputs from reference block and state detected block and trigger constant off timer as the error is cross over zero; the constant off timer, the constant off time is dependent on the input and output voltages of the switching converter. Four function blocks can be simple as comprising of a basic operation and be implemented with several operation functions. The present invention can make the accuracy of the switching converter's output average current independent of the input and output voltages of the switching converter and accuracy of circuit devices and constant off time and in the simplest and lowest cost to implement the average current control of step-down switching converter. | 2008-11-13 |
20080278139 | SLEEP CURRENT ADJUSTING CIRCUIT OF SYSTEM ON CHIP - There is provided a sleep current adjusting circuit of a system on chip including: a regulator supplying a turn-on voltage and a normal current when a mode selection signal is a normal mode signal, and a turn-off voltage when the mode selection signal is a sleep mode signal; a switching device turned on by the turn-on voltage of the regulator to supply the normal current from the regulator to a main circuit part and a sleep operation circuit part, respectively, and turned off by the turn-off voltage of the regulator to block the normal current from being supplied to the main circuit part and supply the sleep current to the sleep operation circuit part; and a current limit device limiting an operating current flowing in response to the operating voltage and supplying the sleep current to the sleep operation circuit part. | 2008-11-13 |
20080278140 | METHOD OF USING A FOUR TERMINAL HYBRID SILICON/ORGANIC FIELD EFFECT SENSOR DEVICE - A four terminal field effect device comprises a silicon field effect device with a silicon N-type semiconductor channel and an N+ source and drain region. An insulator is deposited over the N-type semiconductor channel. An organic semiconductor material is deposited over the insulator gate forming a organic semiconductor channel and is exposed to the ambient environment. Drain and source electrodes are deposited and electrically couple to respective ends of the organic semiconductor channel. The two independent source electrodes and the two independent drain electrodes form the four terminals of the new field effect device. The organic semiconductor channel may be charged and discharged electrically and have its charge modified in response to chemicals in the ambient environment. The conductivity of silicon semiconductor channel is modulated by induced charges in the common gate in response to charges in the organic semiconductor channel. | 2008-11-13 |
20080278141 | Rf Power Sensing Circuit - The present invention provides an electronic circuit for measuring of an output power of a RF power amplifier The electronic circuit comprises a current sensing transistor for sensing the RF current of the power amplifier and a voltage sensing module for sensing the voltage of the RF power amplifier. The electronic circuit further comprises a coherent detector for multiplying the sensed current and the sensed voltage in the time domain. In this way a signal is generated that is directly indicative of the power provided by the power amplifier irrespective of its actual load. Preferably, the coherent detector is implemented as a Gilbert quad and provides a differential output that effectively allows for DC offset compensation. | 2008-11-13 |
20080278142 | FREQUENCY CHARACTERISTIC MEASURING CIRCUIT - A frequency characteristic measuring circuit is disclosed, which includes a first diode element having differential input nodes and differential output nodes, thermally coupled to a resistance element of a differential amplifying circuit having the resistance element connected between the differential output nodes, and driven by a first constant current source, a second diode element for reference driven by a second constant current source, and a detection circuit which detects a potential difference between forward voltages of the first and second diode elements to output a signal in accordance with the detected potential difference. | 2008-11-13 |