Patent application number | Description | Published |
20080242313 | LOW DUTY CYCLE DEVICE PROTOCOL - The subject matter disclosed herein relates to a system and method for establishing communication between a low duty cycle device and other devices through a wireless communication network. In one particular implementation, the low duty cycle device may awaken from a hibernating state in synchronization with transmission of messages. | 10-02-2008 |
20090021408 | ADAPTIVE DYNAMIC RANGE CONTROL - Apparatus and method for processing signals. A sigma-delta modulator is used. An adaptive dynamic range controller is configured to adaptively adjust the dynamic range of a signal output from the sigma-delta modulator. | 01-22-2009 |
20090079486 | SIGNAL GENERATOR WITH SIGNAL TRACKING - Frequency and phase of an output signal is adjusted to track an input signal. A control signal is adjusted to control a frequency of an oscillating signal from which the output signal is derived. In some aspects the frequency of the oscillating signal is adjusted by reconfiguration of reactive circuits coupled to an oscillator circuit. Phase of the output signal may be adjusted based on comparison of the oscillating signal with an adjustable threshold. For example, the adjustable threshold may comprise an adjustable bias signal for a transistor circuit whereby the oscillating signal is provided as an input to the transistor circuit and the output of the transistor circuit provides the output signal. | 03-26-2009 |
20090080101 | SIGNAL GENERATOR WITH ADJUSTABLE FREQUENCY - Frequency of an oscillating signal is temporarily adjusted to adjust frequency and/or phase of an output signal. For example, the frequency of the oscillating signal may be adjusted for a very short period of time to adjust the phase of the output signal. In addition, the frequency of the oscillating signal may be temporarily adjusted in a repeated manner to adjust the effective frequency of the output signal. In some aspects the frequency of the oscillating signal is adjusted by reconfiguration of reactive circuits associated with an oscillator circuit. | 03-26-2009 |
20090080568 | SIGNAL GENERATOR WITH ADJUSTABLE PHASE - Phase of an output signal is based on comparison of an oscillating signal with an adjustable threshold. Here, adjustment of the threshold results in a corresponding adjustment of the phase of the output signal. For example, the adjustable threshold may comprise an adjustable bias signal for a transistor circuit whereby the oscillating signal is provided as an input to the transistor circuit and the output of the transistor circuit provides the output signal. In some aspects these phase adjustment techniques may be employed to provide one or more tunable multiphase clocks. | 03-26-2009 |
20090251208 | LOW POWER SLICER-BASED DEMODULATOR FOR PPM - An apparatus and method for communications is disclosed. The apparatus includes a slicer configured to generate samples of a signal carrying information, and a demodulator having a digital integrator configured to integrate the samples, the demodulator being further configured to recover from the integrated samples data representative of the information carried by the signal. | 10-08-2009 |
20090270030 | MULTI-LEVEL DUTY CYCLING - A duty cycle scheme for wireless communication employs three or more duty cycle levels. In some aspects, a wireless device may continually scan for signals in an active state associated with a first duty cycle, periodically scan for signals during a periodic state associated with a second duty cycle, and periodically scan for signals during a standby state associated with a third duty cycle. Here, the second duty cycle may be lower than the first duty cycle and the third duty cycle may be lower than the second duty cycle. In some aspects the timing of different states may be correlated. In some aspects each wireless in a system may independently control its duty cycle states. | 10-29-2009 |
20090278606 | AGC FOR SLICER-BASED LOW POWER DEMODULATOR - An apparatus and method for performing automatic gain control in a receiver are disclosed. The apparatus may include an amplifier, and the gain control may be based on an output from the amplifier during a time period in which a target signal is not present at the output of the amplifier. | 11-12-2009 |
20100020851 | TRANSMITTED REFERENCE SIGNALING SCHEME - A signaling scheme employs transmitted reference pulses having varying phase. The phase of the reference pulses may be varied in a random manner or in accordance with a data stream. In some aspects a transmitter modulates the phase of the reference pulses to encode an additional data stream in a transmitted reference signal. In some aspects these techniques are employed in a heterogeneous network including coherent and non-coherent receivers. In some aspects these techniques may be employed in an ultra-wide band system. | 01-28-2010 |
20100104133 | Pre-Processed Information Embedding System - Auxiliary information ( | 04-29-2010 |
20100172409 | LOW-COMPLEXITY TRANSFORMS FOR DATA COMPRESSION AND DECOMPRESSION - This disclosure describes the use of non-dyadic discrete cosine transform (DCT) sizes for performing a DCT. Similarly, this disclosure describes the use of non-dyadic inverse discrete cosine transform (IDCT) sizes for performing an IDCT. Using non-dyadic transform sizes may be less computationally expensive compared to using conventional dyadic transform sizes. Aspects of this disclosure may be useful in any device or system that performs a DCT or IDCT. | 07-08-2010 |
20100212020 | PRE-PROCESSED INFORMATION EMBEDDING SYSTEM - Auxiliary information ( | 08-19-2010 |
20100315696 | ANALOG INTERFEROMETRIC MODULATOR - Methods and devices for calibrating and controlling the actuation of an analog interferometric modulator configured to have a plurality of actuation states. Devices and methods for calibrating an analog interferometric modulator to respond in linear relation to an applied voltage. | 12-16-2010 |
20110075724 | ENCODING PARAMETERS WITH UNIT SUM - In general, techniques are described for encoding parameters with unit sum. In one example, an apparatus comprising a control unit implements these parameter encoding techniques. The control unit determines parameters that sum to a constant or unit sum. The control unit includes a parameter coding unit that segments a space that contains the plurality of parameters into a set of portions. The parameter coding unit assigns a different one of a plurality of codewords to each of the portions, selects one of the set of portions that contains a point defined by the plurality of parameters, and codes the plurality of parameters using one of the plurality of codewords assigned to the selected one of the plurality of portions. Rather than code only a subset of these parameters, the parameter coding unit codes all of the parameters with the result of potentially reducing quantization error. | 03-31-2011 |
20110080203 | DELAY LINE CALIBRATION - A tunable delay line is calibrated to maintain the delay of the delay line at a desired value or within a desired range of values. In some aspects a signal is passed through a delay line multiple times so that the cumulative delay of the signal through the delay line (e.g., as indicated by a count) may be calculated over a period of time. The count is compared with an expected count and, based on this comparison, the delay of the delay line is adjusted as necessary. In some aspects the signal may comprise a digital signal. In some aspects a delay through a delay line may be calculated based on analysis of amplitude changes in a signal caused by a phase shift imparted on the signal by the delay line. In some aspects a delay line is incorporated into a transmitted reference system to generate and/or process transmitted reference signals. | 04-07-2011 |
20110170780 | SCALE SPACE NORMALIZATION TECHNIQUE FOR IMPROVED FEATURE DETECTION IN UNIFORM AND NON-UNIFORM ILLUMINATION CHANGES - A normalization process is implemented at a difference of scale space to completely or substantially reduce the effect that illumination changes has on feature/keypoint detection in an image. An image may be processed by progressively blurring the image using a smoothening function to generate a smoothened scale space for the image. A difference of scale space may be generated by taking the difference between two different smoothened versions of the image. A normalized difference of scale space image may be generated by dividing the difference of scale space image by a third smoothened version of the image, where the third smoothened version of the image that is as smooth or smoother than the smoothest of the two different smoothened versions of the image. The normalized difference of scale space image may then be used to detect one or more features/keypoints for the image. | 07-14-2011 |
20110176060 | DATA FEEDBACK FOR BROADCAST APPLICATIONS - This disclosure relates to techniques for processing feedback associated with data previously transmitted by a communication device. One example communication system comprises one or more processors, a channel identifier, a transmitter, and a data receiver/feedback unit. The channel identifier is operable to identify at least one channel currently available in a digital broadcast spectrum. The transmitter is operable to transmit data via the at least one identified channel of the digital broadcast spectrum, wherein the transmitted data complies with a digital broadcast format. The data receiver/feedback unit is operable to receive a representation of the data and compare at least a portion of the received representation of the data to at least a portion of the transmitted data. The one or more processors are configured to determine whether to adjust a broadcast transmission parameter or a data transformation parameter for use in subsequent data communication based upon the comparison. | 07-21-2011 |
20110222774 | IMAGE FEATURE DETECTION BASED ON APPLICATION OF MULTIPLE FEATURE DETECTORS - In a particular embodiment, a method includes applying a first feature detector to a portion of an image to detect a first set of features. The first set of features is used to locate a region of interest, and a boundary corresponding to the region of interest is determined. The method also includes displaying the boundary at a display. In response to receiving user input to accept the displayed boundary, a second feature detector is applied to an area of the image encapsulated by the boundary. | 09-15-2011 |
20110255143 | ANALOG INTERFEROMETRIC MODULATOR - Methods and devices for calibrating and controlling the actuation of an analog interferometric modulator configured to have a plurality of actuation states. Devices and methods for calibrating an analog interferometric modulator to respond in linear relation to an applied voltage. | 10-20-2011 |
20110299770 | PERFORMANCE OF IMAGE RECOGNITION ALGORITHMS BY PRUNING FEATURES, IMAGE SCALING, AND SPATIALLY CONSTRAINED FEATURE MATCHING - A method for feature matching in image recognition is provided. First, image scaling may be based on a feature distribution across scale spaces for an image to estimate image size/resolution, where peak(s) in the keypoint distribution at different scales is used to track a dominant image scale and roughly track object sizes. Second, instead of using all detected features in an image for feature matching, keypoints may be pruned based on cluster density and/or the scale level in which the keypoints are detected. Keypoints falling within high-density clusters may be preferred over features falling within lower density clusters for purposes of feature matching. Third, inlier-to-outlier keypoint ratios are increased by spatially constraining keypoints into clusters in order to reduce or avoid geometric consistency checking for the image. | 12-08-2011 |
20110299782 | FAST SUBSPACE PROJECTION OF DESCRIPTOR PATCHES FOR IMAGE RECOGNITION - A method for generating a feature descriptor is provided. A set of pre-generated sparse projection vectors is obtained. A scale space for an image is also obtained, where the scale space having a plurality scale levels. A descriptor for a keypoint in the scale space is then generated based on a combination of the sparse projection vectors and sparsely sampled pixel information for a plurality of pixels across the plurality of scale levels. | 12-08-2011 |
20110312279 | RF RANGING-ASSISTED LOCAL MOTION SENSING - Example methods, apparatuses, and articles of manufacture are disclosed herein that may be utilized to facilitate or otherwise support RF ranging-assisted local motion sensing based, at least in part, on measuring one or more characteristics of a range between communicating devices in one or more established RF links. | 12-22-2011 |
20120002574 | LOW DUTY CYCLE NETWORK CONTROLLER - Operating at least one low duty cycle (LDC) controller to maintain synchronization between the LDC controller and a plurality of LDC terminals operating over a communication network using only overhead channels of the network and conforming to the protocol and timing of said network, wherein synchronization between the LDC controller and the plurality of LDC terminals is maintained separately from the protocol and timing of the communication network, and enables the LDC controller to schedule power down and wake up of the plurality of LDC terminals for durations longer than allowable under the protocol and timing of the communication network. | 01-05-2012 |
20120044237 | ACTUATION AND CALIBRATION OF CHARGE NEUTRAL ELECTRODE - This disclosure provides systems, methods, and devices for actuating, charging and calibrating the charge on a movable electrode in electromechanical systems (EMS) devices. The electromechanical systems device can include a first electrode, a second electrode spaced apart from the first electrode by a gap, a complementary electrode, at least one electrical contact, and a movable third electrode disposed between the first electrode and the second electrode. In one implementation, a method of calibrating charge on the movable electrode of the EMS device includes electrically connecting a complementary electrode to the first electrode to form a compound electrode and applying a calibration voltage across the compound electrode and the second electrode to produce a uniform electric field in the gap. Under the electric field the third electrode moves towards the first electrode until it connects with the at least one electrical contact. Once in contact with the electrical contact, an electrical charge on the third electrode can be changed and calibrated when the third electrode is in a second position. When a mechanical restorative force on the third electrode exceeds the electric force of the uniform electric field on the third electrode, the third electrode then moves to a third position. | 02-23-2012 |
20120044562 | ACTUATION AND CALIBRATION OF CHARGE NEUTRAL ELECTRODE - This disclosure provides systems, methods, and devices for actuating, charging and calibrating the charge on a movable electrode in electronic devices. The electronic device can include a first electrode, a second electrode spaced apart from the first electrode by a gap, at least one electrical contact, and an electrically neutral movable third electrode disposed between the first electrode and the second electrode. The third electrode can be charged by applying a charging actuation voltage across the first electrode and the second electrode to produce an electric field in the gap. Under the electric field, the electrically neutral third electrode can move towards the first electrode from a first position to a second position where it connects with the electrical contact. Once in contact with the electrical contact, an electric charge on the third electrode can be changed when the third electrode is in the second position. When a mechanical restorative force on the third electrode exceeds the force of the electric field on the third electrode, the third electrode moves to a third position. | 02-23-2012 |
20120122429 | METHOD FOR DIGITAL WATERMARK USE BY A MOBILE STATION - Disclosed is a method for digital watermark use by a mobile station. In the method, a mobile station receives a plurality of digital watermarks. The mobile station detects at least two digital watermarks in the received plurality of watermarks. Based on the at least two detected digital watermarks, a user-specific rule is applied to select a predefined action. The mobile station performs the selected predefined action. | 05-17-2012 |
20120133537 | PERFORMING ENHANCED SIGMA-DELTA MODULATION - In general, techniques are described for performing enhanced sigma-delta modulation. For example, an apparatus comprising a predictive filter unit, an amplifier, an oversampling unit and a sigma-delta modulation unit may implement the techniques. The predictive filter unit performs predictive filtering on an input signal to generate a filtered signal and computes an estimate of a predictive gain as a function of an energy of the input signal and an energy of the filtered signal. The amplifier receives the filtered signal and amplifies the filtered signal based on the predictive gain to generate an amplified signal. The oversampling unit receives the amplifies signal and performs oversampling in accordance with an oversampling rate to generate an oversampled signal. The sigma-delta modulation unit receives the oversampled signal and performs sigma-delta modulation to generate a modulated signal. | 05-31-2012 |
20120162732 | DEVICE AND METHOD FOR A HOLOGRAPHIC DISPLAY WITH ELECTROMECHANICAL ACTUATED MIRROR DISPLAY - The present disclosure provides systems, methods and apparatus for producing holographic displays using an electromechanical systems device. In one aspect, the method can be implemented to allow for simultaneous modulation of phase and amplitude of light in a display device composed of a plurality of pixels. A light source can provide sufficiently coherent light to a light guide, which can direct the light to a plurality of reflective members. The reflective members can reflect the light to a pinhole-lenslet array. The combination of the pinhole-lenslet array and the reflective members can act as a spatial light modulator, modulating the phase and amplitude of the light reflected by the reflective members. The lenslet can focus the light to a plane at the opening of the pinhole, wherein the light can exit the pinhole to be viewed in combination with light from additional pixels, and can be viewed as a holographic image. | 06-28-2012 |
20120244880 | POSITION DETERMINATION WITH PEER-TO-PEER COMMUNICATION - For position determination with peer-to-peer communication, a target terminal broadcasts a request for assistance in determining its position. At least one ranging terminal receives the request. Each ranging terminal sends a response with a time of arrival (TOA) measurement for the request and the position of the ranging terminal. For two-way peer-to-peer, the target terminal receives at least one response from the at least one ranging terminal, obtains a TOA measurement for each response, estimates the distance to each ranging terminal based on the TOA measurement for the request and/or the TOA measurement for the response, and computes a position estimate for itself based on the estimated distance and the position for each ranging terminal. For one-way peer-to-peer, a network entity receives at least one response from the at least one ranging terminal, computes a position estimate for the target terminal, and sends the position estimate to the target terminal. | 09-27-2012 |
20120263388 | ROBUST FEATURE MATCHING FOR VISUAL SEARCH - Techniques are disclosed for performing robust feature matching for visual search. An apparatus comprising an interface and a feature matching unit may implement these techniques. The interface receives a query feature descriptor. The feature matching unit then computes a distance between a query feature descriptor and reference feature descriptors and determines a first group of the computed distances and a second group of the computed distances in accordance with a clustering algorithm, where this second group of computed distances comprises two or more of the computed distances. The feature matching unit then determines whether the query feature descriptor matches one of the reference feature descriptors associated with a smallest one of the computed distances based on the determined first group and second group of the computed distances. | 10-18-2012 |
20120330967 | Descriptor storage and searches of k-dimensional trees - Various arrangements for using a k-dimensional tree for a search are presented. A plurality of descriptors may be stored. Each of the plurality of descriptors stored is linked with a first number of stored dimensions. The search may be performed using the k-dimensional tree for one or more query descriptors that at least approximately match one or more of the plurality of descriptors linked with the first number of stored dimensions. The k-dimensional tree may be built using the plurality of descriptors wherein each of the plurality of descriptors is linked with a second number of dimensions when the k-dimensional tree is built. The second number of dimensions may be a greater number of dimensions than the first number of stored dimensions. | 12-27-2012 |
20130039566 | CODING OF FEATURE LOCATION INFORMATION - Methods and devices for coding of feature locations are disclosed. In one embodiment, a method of coding feature location information of an image includes generating a hexagonal grid, where the hexagonal grid includes a plurality of hexagonal cells, quantizing feature locations of an image using the hexagonal grid, generating a histogram to record occurrences of feature locations in each hexagonal cell, and encoding the histogram in accordance with the occurrences of feature locations in each hexagonal cell. The method of encoding the histogram includes applying context information of neighboring hexagonal cells to encode information of a subsequent hexagonal cell to be encoded in the histogram, where the context information includes context information from first order neighbors and context information from second order neighbors of the subsequent hexagonal cell to be encoded. | 02-14-2013 |
20130119489 | METHOD AND APPARATUS FOR WAFER-LEVEL SOLDER HERMETIC SEAL ENCAPSULATION OF MEMS DEVICES - A plurality of MEMS devices are formed on a substrate, a sacrificial layer is formed to cover each of the MEMS devices and a protective cap layer is formed on the sacrificial layer. A release hole is formed through the protective cap layer to the underlying sacrificial layer, and a releasing agent is introduced through the release hole to remove the sacrificial layer under the protective cap layer and expose a MEMS device. Optionally, the MEMS device can be released with the same releasing agent or, optionally, with a secondary releasing agent. The release hole is solder sealed, to form a hermetic seal of the MEMS device. Optionally, release holes are formed at a plurality of locations, each over a MEMS device and the releasing forms a plurality of hermetic sealed MEMS devices on the wafer substrate, which are singulated to form separate hermetically sealed MEMS devices. | 05-16-2013 |
20130135324 | SYSTEMS, DEVICES, AND METHODS FOR DRIVING AN ANALOG INTERFEROMETRIC MODULATOR - This disclosure provides systems, methods, and apparatus for calibrating and controlling the actuation of an analog interferometric modulator. In one aspect, an electrode of a movable layer of the analog interferometric modulator may include a part for receiving a drive voltage, and an electrically isolated part. A voltage may be sensed from the electrically isolated part, and used to determine the position of the movable layer and/or provide feedback to the drive voltage. | 05-30-2013 |
20130135705 | SYSTEMS, DEVICES, AND METHODS FOR DRIVING AN ANALOG INTERFEROMETRIC MODULATOR - This disclosure provides systems, methods and apparatus, including computer programs encoded on computer storage media, for accurately positioning a movable conductive layer of a reflective display element. In one aspect, an initial position of the movable conductive layer with respect to at least one or more fixed conductive layers is sensed. A charging voltage may be determined based at least in part on the initial position. The charging voltage may be applied to the movable conductive layer. | 05-30-2013 |
20130197793 | CALIBRATED HARDWARE SENSORS FOR ESTIMATING REAL-WORLD DISTANCES - In some embodiments, methods and systems are provided for assisting a user in determining a real-world distance. Hardware-based sensors (e.g., present in a mobile electronic device) may allow for a fast low-power determination of distances. In one embodiment, one or more telemetry-related sensors may be incorporated into a device. For example, data detected by a frequently-calibrated integrated accelerometer may be used to determine a tilt of the device. A device height may be estimated based on empirical data or based on a time difference between a signal (e.g., a sonar signal) emitted towards the ground and a corresponding detected signal. A triangulation technique may use the estimated tilt and height to estimate other real-world distances (e.g., from the device to an endpoint or between endpoints). | 08-01-2013 |
20130201210 | VIRTUAL RULER - In some embodiments, first information indicative of an image of a scene is accessed. One or more reference features are detected, the reference features being associated with a reference object in the image. A transformation between an image space and a real-world space is determined based on the first information. Second information indicative of input from a user is accessed, the second information identifying an image-space distance in the image space corresponding to a real-world distance of interest in the real-world space. The real-world distance of interest is then estimated based on the second information and the determined transformation. | 08-08-2013 |
20130293523 | VOLTAGE BIASED PULL ANALOG INTERFEROMETRIC MODULATOR WITH CHARGE INJECTION CONTROL - This disclosure provides systems, methods and apparatus for driving three-terminal electromechanical systems (EMS) devices. The driving systems and methods described herein include a switched capacitor charge injection circuit that is configured to isolate a single EMS device and transfer a desired amount of charge to the isolated device such that the device can be actuated to produce a desired optical, electrical or mechanical effect. The charge injection circuit can include an operational amplifier and can be connected such that the EMS device is placed in the feedback path of the operational amplifier. | 11-07-2013 |
20140037189 | Fast 3-D point cloud generation on mobile devices - A system, apparatus and method for determining a 3-D point cloud is presented. First a processor detects feature points in the first 2-D image and feature points in the second 2-D image and so on. This set of feature points is first matched across images using an efficient transitive matching scheme. These matches are pruned to remove outliers by a first pass of s using projection models, such as a planar homography model computed on a grid placed on the images, and a second pass using an epipolar line constraint to result in a set of matches across the images. These set of matches can be used to triangulate and form a 3-D point cloud of the 3-D object. The processor may recreate the 3-D object as a 3-D model from the 3-D point cloud. | 02-06-2014 |
20140071516 | ANALOG INTERFEROMETRIC MODULATOR - Methods and devices for calibrating and controlling the actuation of an analog interferometric modulator configured to have a plurality of actuation states. Devices and methods for calibrating an analog interferometric modulator to respond in linear relation to an applied voltage. | 03-13-2014 |
20140118360 | THINFILM STACKS FOR LIGHT MODULATING DISPLAYS - This disclosure provides systems, methods and apparatus for absorption film stacks. In one aspect, the absorption film stack is an interferometric absorption film stack that, for a selected wavelength of light, reduces light reflected from a surface of the stack by setting up a standing wave within the stack of materials. In some implementations, an absorbing layer may be placed at the peak of the standing wave interference pattern. The absorbing layer can be implemented to absorb selected wavelengths of light and substantially reduce the amount of unwanted reflections. In some other implementations, a reflective surface may be formed on the surface of the stack opposite the absorbing layer. | 05-01-2014 |
20140118829 | SEE THROUGH NEAR-EYE DISPLAY - The various embodiments include a near-eye display having a transmissive display and a diffractive micro-lens array. The transmissive display may be positioned relative to the diffractive micro-lens array so that the distance between the transmissive display and the diffractive micro-lens array is be approximately equal to focal length of the diffractive micro-lens array. The transmissive display may also be positioned relative to the diffractive micro-lens array so that a percentage of light emitted from the transmissive display is diffracted by the micro-lens array and collimated into focus on a retina of a human eye. The transmissive display may be further positioned relative to the diffractive micro-lens array so that light from a real world scene passes through transparent portions of the transmissive display and is diffracted by the micro-lens array out of focus of the human eye. | 05-01-2014 |
20140198128 | DYNAMIC ZONE PLATE AUGMENTED VISION EYEGLASSES - A method, an apparatus, and a computer program product for modulating optics in a display are provided. An apparatus forms a plurality of zone plates in a liquid crystal using electric fields. Each zone plate has a center, and the centers are aligned along a first axis of the display. The apparatus moves the plurality of zone plates in a first direction along a second axis of the display different from the first axis of the display, while maintaining alignment of the centers of the plurality of zone plates along the first axis. Such movement is provided through repositioning of electric fields through the liquid crystal. | 07-17-2014 |
20140204425 | FAST VECTOR ERROR DIFFUSION - Subdividing a color space is described for vector error diffusion which includes obtaining color coordinates for each primary color in the color space, and comparing the color coordinates to a threshold value for each coordinate plane of the color space. In response to the comparing, each primary color is grouped into a quadrant of the color space, wherein each quadrant is defined by the threshold value for each coordinate plane. In other aspects, a mapping a color to a closet primary color is described in a color space that includes a display determining color coordinates of the color and identifying a matching quadrant of a plurality of quadrants dividing the color space, wherein the determined color coordinates fall within the matching quadrant. A representative display device searches for the closest primary color within the matching quadrant and maps the color to the closest primary color found. | 07-24-2014 |
20140267443 | ELECTROMECHANICAL SYSTEMS DEVICE WITH SEGMENTED ELECTRODES - This disclosure provides systems, methods and apparatus for increasing a range of stable travel positions of a movable layer within electromechanical systems (EMS) devices. In one aspect, an electrically isolated floating electrode can be disposed between a driving electrode within a movable layer and a fixed electrode in order to increase a stable travel range of the movable layer. By segmenting the electrically isolated floating electrode into multiple isolated electrode segments, unbalanced charge accumulation in response to tilting of the movable layer can be constrained to further increase the stable travel range of the movable layer. | 09-18-2014 |
20150022876 | MULTI-STATE INTERFEROMETRIC MODULATOR WITH COLOR ATTENUATOR - This disclosure provides systems, methods and apparatus for multi-state interferometric modulator (MS-IMOD) implementations with an improved white-state color by incorporating an attenuator. The attenuator may be part of a mirror stack or part of an absorber stack. The attenuator may be capable of reducing the amount of green light reflected when the MS-IMOD is in a white state. The attenuator may include an absorber and/or a notch filter. In some implementations, the white color that is reflected when the MS-IMOD is in the white state may be substantially similar to that of CIE Standard Illuminant D65. | 01-22-2015 |
20150066427 | CALIBRATED HARDWARE SENSORS FOR ESTIMATING REAL-WORLD DISTANCES - In some embodiments, methods and systems are provided for assisting a user in determining a real-world distance. Hardware-based sensors (e.g., present in a mobile electronic device) may allow for a fast low-power determination of distances. In one embodiment, one or more telemetry-related sensors may be incorporated into a device. For example, data detected by a frequently-calibrated integrated accelerometer may be used to determine a tilt of the device. A device height may be estimated based on empirical data or based on a time difference between a signal (e.g., a sonar signal) emitted towards the ground and a corresponding detected signal. A triangulation technique may use the estimated tilt and height to estimate other real-world distances (e.g., from the device to an endpoint or between endpoints). | 03-05-2015 |