Patent application number | Description | Published |
20080266506 | Liquid Crystal Display Device - The present invention provides a liquid crystal display device which can enhance the accuracy in feeding back a common potential applied to common voltage supply lines. A display panel includes a common bus line electrically connected to common electrodes and formed annularly on a periphery of the display region, a common sensing line for feeding back a voltage of the common bus line to a control printed circuit board, a scanning-signal-drive-circuit-use power source line for supplying electricity for driving a scanning signal drive circuit, and a common-voltage-supply-use line for supplying a common voltage to the common bus line. The common-voltage-supply-use line, the common sensing line and the scanning-signal-drive-circuit-use power source line are formed along one side of the display panel to which at least the scanning signal drive circuit is connected. The common sensing line is formed between the common-voltage-supply-use line and the scanning-signal-drive-circuit-use power source line on one side of the display panel. | 10-30-2008 |
20080284700 | Liquid crystal display device - To suppress degradation of image quality caused by using an AC drive method so as to display a high-quality image. If a drive state of each of subpixels at a time when a gray-scale voltage higher than a counter voltage applied to a counter electrode is applied to a pixel electrode is defined as a positive drive state and if the drive state of each subpixel at a time when a gray-scale voltage lower than a counter voltage applied to the counter electrode is applied to the pixel electrode is defined as a negative drive state, an image line drive circuit changes the drive state of each subpixel from the positive drive state to the negative drive state or from the negative drive state to the positive drive state every two frames, as well as inverts a phase of the drive state of each subpixel every N (N≧4) frames. If a gray-scale voltage to be provided to each of image lines by an image line drive circuit in a frame A that is a first frame immediately after the phase inversion is defined as VA, and if a normal gray-scale voltage to be provided to each of the image lines by the image line drive circuit in a frame B that is a normal frame is defined as VB, |VA|<|VB| is satisfied at least with respect to a halftone. | 11-20-2008 |
20080284708 | Liquid Crystal Display Device - In a liquid crystal display device in which each one pixel has two switching elements and two pixel electrodes, a heat value of a drive circuit can be suppressed to a low level thus preventing the deterioration of image quality. In a liquid crystal display device in which a display region is formed of a mass of pixels each having a first switching element, a first pixel electrode connected to the first switching element, a second switching element, and a second pixel electrode connected to the second switching element, the first switching element and the second switching element in one pixel are respectively connected with different video signal lines, and the relationship between a potential of a signal applied to the first pixel electrode in one pixel and a potential of a signal applied to the counter electrode and the relationship between a potential of a signal applied to the second pixel electrode in the one pixel and the potential of the signal applied to the counter electrode during one frame period is set such that one relationship assumes the positive-polarity relationship and the other relationship assumes the negative-polarity relationship. | 11-20-2008 |
20080303770 | Liquid Crystal Display Device - A counter voltage supply circuit has an inverting amplifier that inversely amplified a voltage detected from a specified part of a counter electrode of a liquid crystal display panel and supplies the amplified voltage to a counter voltage supply end of the counter electrode. The inverting amplifier includes an operational amplifier having a feedback resistor connected between an inverting input terminal and an output terminal. The feedback resistor includes a first resistor, and n resistors each of which is connected parallel to the first resistor via a switching element. As the n switching elements are selectively turned on and off by a switching element control circuit in accordance with a scanning position, the resistance value of the feedback resistor is varied and the gain of the operational amplifier is changed. Cross-talk due to coupling noise to the counter electrode generated by AC driving of a video voltage and deterioration in display quantity of a display image on the liquid crystal display panel can be prevented. | 12-11-2008 |
20090066687 | LIQUID CRYSTAL DISPLAY DEVICE - (Object) To provide a liquid crystal display device which simultaneously uses a method for simultaneously driving two screens and a method for driving scan-back light. | 03-12-2009 |
20090102766 | DISPLAY DEVICE - The present invention prevents a TFT liquid crystal display device from deteriorating its image quality due to the insufficiency of voltage written through TFTs. There is disclosed a display device that includes a display panel in which the plural pixel electrodes are positioned between two neighboring video signal lines and arranged in the extending direction of the video signal lines, a pixel electrode connected to one of the two neighboring video signal lines through a TFT and a pixel electrode connected to the other video signal line through a TFT being alternately arranged; and a correction circuit that compares the tone of video data to be written into one of the plural pixel electrodes against the tone of video data to be written into a preceding pixel electrode that is connected through a TFT to the video signal line, to which the one of the plural pixel electrodes is also connected through a TFT, and placed one position toward a signal input end of the video signal line as compared to the one of the plural pixel electrodes, and corrects the video data to be written into the one of the plural pixel electrodes. | 04-23-2009 |
20090102826 | Display device - A display device having a display element is configured such that the extending directions of electrodes are made different from each other among upper, lower, left and right pixels. | 04-23-2009 |
20090262066 | DISPLAY DEVICE - An object of the present invention is to slow the deterioration in the uniformity of the surface brightness when all of the lights emit light under the same conditions in a display device having a backlight where local dimming control is possible. The present invention provides a display device having a display panel with a display region which is a set of a number of pixels, a direct backlight with a number of LED lights, a first control means for controlling the tone of each pixel, and a second control means for controlling the brightness of each LED light, and the display device has an illuminance measuring means for measuring the illuminance in the periphery of said display device, and the above described second control means makes the brightness of all of the LED lights the same in the case where the illuminance as measured by the above described illuminance measuring means is higher than a preset value and determines the brightness of each LED light on the basis of the tone of each pixel in the case where the illuminance is lower than the preset value. | 10-22-2009 |
20100053505 | BACKLIGHT FOR LIQUID CRYSTAL DISPLAY DEVICE AND LIQUID CRYSTAL DISPLAY DEVICE USING THE SAME - An object of the present invention is to provide a backlight for a liquid crystal display device which is easy to repair and prevents the brightness from lowering on the screen, and thus can provide high-quality images, where the region where point light source elements are aligned is divided into a number of smaller regions, and backlight units are provided so as to correspond to the respective smaller regions, as well as a liquid crystal display device using the same. The present invention provides a backlight for a liquid crystal display device where a number of point light source elements | 03-04-2010 |
20100128210 | Display device - The present invention is intended to control the color temperature of white exhibited by a liquid crystal display device. White is produced when light waves emitted through pixels associated with three colors of red; green, and blue have maximum intensities. The amounts of light emitted through the respective pixels are controlled by differentiating the shapes of the pixel electrodes disposed at the respective pixels from one another. Thus, the color temperature of white is controlled. Otherwise, the shapes of interceptive films disposed at the respective pixels are differentiated from one another in order to control light waves emitted through the respective pixels. Thus, the color temperature of white is controlled. The interceptive film may be shaped like the pixel electrode. Otherwise, the interceptive film may be realized with an interceptive pattern other than that of the pixel electrode or one of openings bored in a black matrix. | 05-27-2010 |
20100188600 | LIQUID CRYSTAL DISPLAY DEVICE - In a liquid crystal display device including a liquid crystal display panel, and a backlight disposed on the rear surface of the liquid crystal display panel, the backlight is provided with a plurality of white light-emitting diodes arranged in a plane opposing the liquid crystal display panel. Based on a chromaticity coordinate value representing a color of emission identified for each of the white light-emitting diodes, the white light-emitting diodes are selectively combined for arrangement in proximity in such a manner that the color of emission as a result of averaging over the white light-emitting diodes ( | 07-29-2010 |
20100208168 | LIQUID CRYSTAL DISPLAY DEVICE - The present invention provides a liquid crystal display device which can reduce the number of cables so as to prevent the occurrence of the brightness irregularities. The liquid crystal display device includes a liquid crystal display panel and a backlight. The backlight includes an LED substrate on which a plurality of LEDs are mounted, a reflection sheet which is arranged on the LED substrate, a diffusion plate which is arranged in a spaced-apart manner from the LED substrate, side supports which support the diffusion plate at end portions of the LED substrate, connectors which are provided for electrical connection with an external device, and electronic parts which are electrically connected with at least one of these LEDs. The connectors and the electronic parts are mounted on the LED substrate below the side supports. The side supports exhibit higher light reflectance than the connectors and the electronic parts. | 08-19-2010 |
20100208171 | LIQUID CRYSTAL DISPLAY DEVICE - A liquid crystal display device includes a liquid crystal display panel and a backlight. The backlight includes: a light emitting diode substrate on which light emitting diodes are mounted; a reflection sheet that is provided on the light emitting diode substrate and has holes formed therein, each of the light emitting diodes being provided inside each of the holes; and lenses provided on the light emitting diodes, for diffusing light from the light emitting diodes. Each of the lenses is larger than the each of the holes, and entirely covers the each of the holes and also covers a part of the reflection sheet including an entire periphery of the each of the holes. | 08-19-2010 |
20110317110 | Display device - The present invention is intended to control the color temperature of white exhibited by a liquid crystal display device. White is produced when light waves emitted through pixels associated with three colors of red, green, and blue have maximum intensities. The amounts of light emitted through the respective pixels are controlled by differentiating the shapes of the pixel electrodes disposed at the respective pixels from one another. Thus, the color temperature of white is controlled. Otherwise, the shapes of interceptive films disposed at the respective pixels are differentiated from one another in order to control light waves emitted through the respective pixels. Thus, the color temperature of white is controlled. The interceptive film may be shaped like the pixel electrode. Otherwise, the interceptive film may be realized with an interceptive pattern other than that of the pixel electrode or one of openings bored in a black matrix. | 12-29-2011 |
20120026214 | Liquid Crystal Display Device Having A Plurality of First and Second Scanning Lines and a Plurality of First and Second Video Lines - A liquid crystal display device includes a liquid crystal display panel having first and second scanning lines, first and second video lines, a first scanning line driving circuit, a second scanning line driving circuit, at least one first video line driving circuit, at least one second video line driving circuit, a backlight having a number of light sources, and a light controlling circuit for controlling the turning on and off of the backlight. The first scanning lines are divided into M groups where M is an integer of 2 or more (M≧2), the second scanning lines are divided into N groups where N is an integer of 2 or more (N≧2), the region of the backlight which corresponds to the first scanning lines is divided into M regions, and the region which corresponds to the second scanning lines is divided into N regions. | 02-02-2012 |
20120113072 | Display Device - A display device having a display element is configured such that the extending directions of electrodes are made different from each other among upper, lower, left and right pixels. | 05-10-2012 |
20120229523 | LIQUID CRYSTAL DISPLAY DEVICE - In the case where the gray-scale value of the pixel X is the minimum gray-scale value, the data line driving circuit ( | 09-13-2012 |
20120229524 | LIQUID CRYSTAL DISPLAY DEVICE - Provided is a liquid crystal display device, including: a data line; a plurality of pixel circuits; an output grayscale value generating circuit for outputting an output grayscale value obtained by correcting a display grayscale value indicating a grayscale potential having one of positive polarity and negative polarity; and a data-line driving circuit for selectively outputting an output potential having one of positive polarity and negative polarity corresponding to the output grayscale value to the data line. The data-line driving circuit outputs the potential so that the positive-polarity output potential corresponding to a smallest output grayscale value becomes lower than a positive-polarity grayscale potential indicated by a smallest one of the display grayscale values and that the negative-polarity output potential corresponding to the smallest output grayscale value becomes higher than a negative-polarity grayscale potential indicated by the smallest one of the display grayscale values. | 09-13-2012 |
20120229525 | LIQUID CRYSTAL DISPLAY DEVICE - A liquid crystal display device includes a plurality of pixel circuits, data lines, and a data-line driving circuit connected to the data lines. Each of the pixel circuits includes a pixel capacitance having one end provided with a common potential. In accordance with a grayscale value for one of the plurality of pixel circuits, the data-line driving circuit selectively outputs a positive-polarity signal and a negative-polarity signal to the one pixel circuit. The data-line driving circuit outputs the positive-polarity signal and the negative-polarity signal so that an average of a potential of the positive-polarity signal and a potential of the negative-polarity signal corresponding to the grayscale value changes in accordance with the grayscale value, a temperature, and a position of the one pixel circuit. | 09-13-2012 |
20130265531 | Display Device - The present invention is intended to control the color temperature of white exhibited by a liquid crystal display device. White is produced when light waves emitted through pixels associated with three colors of red, green, and blue have maximum intensities. The amounts of light emitted through the respective pixels are controlled by differentiating the shapes of the pixel electrodes disposed at the respective pixels from one another. Thus, the color temperature of white is controlled. Otherwise, the shapes of interceptive films disposed at the respective pixels are differentiated from one another in order to control light waves emitted through the respective pixels. Thus, the color temperature of white is controlled. The interceptive film may be shaped like the pixel electrode. Otherwise, the interceptive film may be realized with an interceptive pattern other than that of the pixel electrode or one of openings bored in a black matrix. | 10-10-2013 |