Control Means At Each Display Element Patents (Class 345/90)
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Patent number: 8259051Abstract: A liquid crystal display includes a plurality of subpixels respectively having switching elements and arranged in a matrix, a plurality of gate lines connected to the subpixels via the switching elements and transmitting a gate signal for turning on or off the switching elements, and a plurality of data lines connected to the subpixels via the switching elements and transmitting a data voltage. The respective subpixels are located in areas defined by two adjacent gate lines and two adjacent data lines, which are uniquely connected to a pair of gate line and data line, and at least one of the subpixels is connected to the different gate lines or the data line positioned at opposite side with respect to the other subpixel of the same row. In this case, a pair of subpixels adjacent above and below are connected to the gate line therebetween or the gate lines positioned at opposite side each other. In this way, any inversions for each color can be performed without changing conventional driving ICs.Type: GrantFiled: August 25, 2011Date of Patent: September 4, 2012Assignee: Samsung Electronics Co., Ltd.Inventor: Baek-Woon Lee
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Patent number: 8254136Abstract: A printed circuit board (“PCB”) includes a first pattern structure, a second pattern structure, a third pattern structure, and a fourth pattern structure. The first pattern structure includes a first ground pattern. The second pattern structure includes a first line pattern overlapping the first ground pattern and a second ground pattern electrically insulated from the first line pattern. The third pattern structure includes a third ground pattern overlapping the first line pattern and a second line pattern overlapping the second ground pattern. The fourth pattern structure includes a fourth ground pattern overlapping the second line pattern. Therefore, the PCB may decrease noise.Type: GrantFiled: September 4, 2008Date of Patent: August 28, 2012Assignee: Samsung Electronics Co., Ltd.Inventors: Kwan-Ho Kim, Ick-Kyu Jang, Ji-Man Myeong
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Patent number: 8242971Abstract: In a multi-window display device, the following has been merely performed: before data for plural screens is inputted to a display, video signals themselves are subjected to signal processing, and the processed video signals are inputted to the display, whereby display is performed. Therefore, a circuit for performing signal processing, for example, an IC has a complicated structure since video signals for plural screens are stored in a memory. There is provided a pixel structure in which: signal lines for plural screens are arranged; and one of the signal lines is selected to supply a video signal to a display element. For example, in the case of performing display of two screens, there is provided a pixel structure in which: two signal lines, which are inputted with respective video signals for a first screen and a second screen, are arranged; and one of the signal lines is selected to supply a video signal from the selected signal line to a display element.Type: GrantFiled: February 19, 2010Date of Patent: August 14, 2012Assignee: Semiconductor Energy Laboratory Co., Ltd.Inventors: Hajime Kimura, Shunpei Yamazaki
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Patent number: 8242997Abstract: A liquid crystal display (LCD) panel includes a plurality of data and gate lines, a plurality of main switching elements, and a plurality of liquid crystal capacitors. Each main switching element is electrically connected to a main data and gate line. Each liquid crystal capacitor is electrically connected to a main switching element. The LCD panel further includes a plurality of partial gate lines to transmit a plurality of partial driving signals, a plurality of partial data lines to transmit a plurality of data signals, and a plurality of partial switching elements. Each partial switching element is turned on based on a partial driving signal to provide a memory with a data signal via a partial data line when a main switching element is enabled, and to provide a liquid crystal capacitor with a data signal stored in the memory when the main switching element is turned off.Type: GrantFiled: September 17, 2007Date of Patent: August 14, 2012Assignee: Samsung Electronics Co., Ltd.Inventors: Jae-Sic Lee, Il-Gon Kim, Cheol-Min Kim
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Patent number: 8237644Abstract: The present invention relates to the architecture of a valve of liquid crystal elements with pixel memory for front or rear projector. The valve comprises elements arranged in rows and columns, each of the elements comprising a liquid crystal controlled by drive means so as to display video information relating to at least one image. According to the invention, one seeks to reduce the size of the drive means of the liquid crystals. Accordingly, capacitors and transistors of the drive means are shared in common between several elements of the valve. The video information intended to be displayed by each of the elements of the valve is coded as a common value shared by a group of at least two adjacent elements of the valve and a specific value before being transmitted to the valve.Type: GrantFiled: February 1, 2005Date of Patent: August 7, 2012Assignee: Thomson LicensingInventors: Patrick Morvan, Philippe Rio, Maurice Fritsch, Didier Doyen
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Patent number: 8237749Abstract: An image display device and a method for correcting a display characteristic thereof are provided. The image display device includes a composite color luminance determination unit which determines luminance of a composite color using luminance of a neutral color and luminance of a pure chromatic color, a display unit which displays an image signal using the luminance of the neutral color and the luminance of the pure chromatic color and the determined luminance of the composite color, a display characteristic measurement unit which measures a display characteristic parameter from the displayed image signal, and a display characteristic correction unit which corrects a display characteristic according to a result of comparing the measured display characteristic parameter and a preset target value. Accordingly, an accurate gamma correction can be performed.Type: GrantFiled: May 21, 2008Date of Patent: August 7, 2012Assignee: Samsung Electronics Co., Ltd.Inventors: Tae-hee Kim, Jae-young Choi
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Patent number: 8237646Abstract: In a display apparatus having a plurality of pixel parts, each pixel part receives a data signal in response to a present gate signal and charges first and second pixel voltages having the same voltage level. A plurality of voltage controllers includes a level-down part to lower a voltage level of the second pixel voltage using a previous pixel voltage charged in a previous frame in response to a next gate signal and a level-up part to receive the lowered second pixel voltage in response to the next gate signal to boost up a voltage level of the first pixel voltage.Type: GrantFiled: June 3, 2008Date of Patent: August 7, 2012Assignee: Samsung Electronics Co., Ltd.Inventors: Hee-Wook Do, Seung-Beom Park, Hoon Kim, Hye-Ran You, Jian Gang Lu, Hee-Seop Kim, Young-Chol Yang, Seung-Hoon Lee
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Publication number: 20120194498Abstract: A bi-stable active matrix (AM) display apparatus and a method for driving a display panel thereof are provided. The bi-stable AM display apparatus includes a bi-stable AM display panel, a scan driver, a data driver and a controller. A frame period is divided into a resetting phase and a determining phase. The controller resets pixels on a plurality of scan lines of the bi-stable AM display panel to a homotropic state in the resetting phase through the scan driver and the data driver. The controller writes frame information into the pixels on the scan lines in the determining phase through the scan driver and the data driver.Type: ApplicationFiled: July 15, 2011Publication date: August 2, 2012Applicants: KENT STATE UNIVERSITY, INDUSTRIAL TECHNOLOGY RESEARCH INSTITUTEInventors: Deng-Ke Yang, Heng-Yin Chen, Young-Cheol Yang, Rafael S. Zola, Chao-Chiun Liang, Chih-Jen Chen
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Publication number: 20120194494Abstract: In a display panel and a method of manufacturing the same, the display panel includes a first display substrate, a second display substrate and a sealing member. The first display substrate includes a first alignment layer in a first display region and a first peripheral region of a first base substrate, and a first backflow-blocking pattern in the first peripheral region and having a curvature to surround a vertex portion of the first display region. The second display substrate includes a second alignment layer in a second display region which faces the first display region and a second peripheral region of a second base substrate. The sealing member includes a corner portion having substantially the same curvature as the first backflow-blocking pattern to surround an outline of the first and second peripheral regions.Type: ApplicationFiled: June 10, 2011Publication date: August 2, 2012Applicant: SAMSUNG ELECTRONICS CO., LTD.Inventors: Young-Min JUNG, Sang-Yeoul LIM, Kweon-Sam Hong, Hong-Joon MOON, You-Hyun JEONG, Sang-Ho KIM, Ho-Jun LEE
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Patent number: 8232982Abstract: A variation in threshold may be suppressed by structuring an analog switch by a MOS transistor and forming a signal synchronized to a clock by making the clock which is a common signal in continuity or discontinuity. An object of the present invention is to reduce the variation in the signal synchronized to the clock by the variation in threshold of the MOS transistor in a circuit which is synchronized to the clock.Type: GrantFiled: April 2, 2008Date of Patent: July 31, 2012Assignee: Semiconductor Energy Laboratory Co., Ltd.Inventor: Yukio Tanaka
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Patent number: 8228348Abstract: The invention describes a method for improving the spatial and off-axis conformance of display systems with respect to an enforced greyscale or color display standard. In the display systems, the native transfer curve is obtained for each pixel or zone of pixels, i.e. as a function of position on the display and as a function of viewing-angle. Once that information is available, an optimal conversion scheme from P-value to DDL can be created for each position on the display and this for all possible viewing-angles. In use, the conversion scheme is used to obtain an improved DICOM behavior. This optimization is also done with respect to the viewing-angle, based on a pre-set, selectable or measured viewing angle.Type: GrantFiled: April 15, 2005Date of Patent: July 24, 2012Assignee: Barco N.V.Inventor: Tom Kimpe
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Patent number: 8228277Abstract: The invention provides an active matrix EL display device which can perform a clear multi-gray scale color display. In particular, the invention provides a large active matrix EL display device at low cost by a manufacturing method which can selectively form a pattern. Power supply lines in a pixel portion are arranged in matrix by the manufacturing method which can selectively form a pattern. Further, capacitance between wirings is reduced by providing a longer distance between adjacent wirings by the manufacturing method which can selectively form a pattern.Type: GrantFiled: November 10, 2011Date of Patent: July 24, 2012Assignee: Semiconductor Energy Laboratory Co., Ltd.Inventors: Yasunori Yoshida, Hajime Kimura, Shinji Maekawa, Osamu Nakamura, Shunpei Yamazaki
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Patent number: 8228276Abstract: A display driver apparatus and an inversion method thereof are provided. The display driver apparatus includes a gate drive unit, a source drive unit, a multiplexer unit and a common voltage generation unit. The gate drive unit is used to generate a gate signal for turning on/off sub-pixels. The source drive unit is used to generate a source signal required by the display panel. The multiplexer unit is used to regulate the sequence for the source signal to be delivered to the sub-pixels. The common voltage generation unit is used to generate a common voltage and switch the level of the common voltage during the enable period of the gate signal.Type: GrantFiled: September 20, 2006Date of Patent: July 24, 2012Assignee: Novatek Microelectronics Corp.Inventors: Hsueh-Yi Lee, Chih-Wei Tang, Wing-Kai Tang
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Patent number: 8223093Abstract: An electro-optical device includes an element substrate having a first signal line; a second signal line extending in a second direction crossing the first signal line; a first field-effect transistor including a first semiconductor layer extending in a direction crossing the second direction; a second field-effect transistor including a second semiconductor layer extending in the direction crossing the second direction; a first pixel electrode is adjacent to a second pixel electrode. The first semiconductor layer and the second semiconductor layer are displaced from each other in the second direction. An end of the first semiconductor layer facing toward the second pixel electrode is closer to the second pixel electrode than an end of the second semiconductor layer facing toward the first pixel electrode.Type: GrantFiled: August 28, 2009Date of Patent: July 17, 2012Assignee: Seiko Epson CorporationInventor: Tomoki Yokota
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Patent number: 8217877Abstract: A display device is provided in which a signal line can be shared by a plurality of pixels and data supplied from scan lines can be distributed to a desired pixel selected from the plurality of pixels. The display is characterized in its circuit structure of the plurality of pixels, which allows the signal line to be shared by neighboring three pixels. This circuit structure results in the reduction of the number of signal lines and the simplification of the structure of the signal line driver circuit, which contributes to the reduction of the power consumption and miniaturization of the signal line driver circuit. The detailed structure of the display device is defined in the specification.Type: GrantFiled: October 10, 2008Date of Patent: July 10, 2012Assignee: Semiconductor Energy Laboratory Co., Ltd.Inventor: Takahiro Fukutome
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Patent number: 8217872Abstract: The present invention provides a liquid crystal display device including an active matrix substrate with improved characteristics and providing high-contrast between black and white displays.Type: GrantFiled: December 26, 2008Date of Patent: July 10, 2012Assignee: Sharp Kabushiki KaishaInventors: Ryohki Itoh, Satoshi Horiuchi, Takaharu Yamada
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Patent number: 8217913Abstract: Displays with touch sensing circuitry integrated into the display pixel stackup are provided. Circuit elements, such as touch signal lines, such as drive lines and sense lines, grounding regions, in the display pixel stackups can be grouped together to form touch sensing circuitry that senses a touch on or near the display. An integrated touch screen can include multi-function circuit elements that can operate as circuitry of the display system to generate an image on the display, and can also form part of a touch sensing system that senses one or more touches on or near the display. The multi-function circuit elements can be, for example, capacitors in display pixels that can be configured to operate as storage capacitors/electrodes, common electrodes, conductive wires/pathways, etc., of the display circuitry in the display system, and that may also be configured to operate as circuit elements of the touch sensing circuitry.Type: GrantFiled: August 21, 2009Date of Patent: July 10, 2012Assignee: Apple Inc.Inventors: Steven Porter Hotelling, Marduke Yousefpor, Shih Chang Chang, John Z. Zhong
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Patent number: 8217876Abstract: A liquid crystal display includes a source driver, for generating a pixel data voltage, a gate driver, for generating a scanning signal voltage, and a plurality of pixel units. Each pixel unit includes a switch unit for delivering the pixel data voltage upon receiving the scanning signal voltage, a pixel electrode electrically coupled to the switch unit, a first electrode for supplying a first common voltage, a second electrode for supplying a second common voltage, a liquid crystal capacitor electrically coupled between the first electrode and the pixel electrode for driving liquid crystal layer in response to the pixel data voltage and the first common voltage, and a storage capacitor electrically coupled between the pixel electrode and the second electrode.Type: GrantFiled: November 16, 2007Date of Patent: July 10, 2012Assignee: AU Optronics Corp.Inventors: Chao-Ching Hsu, Yi-Suei Liao
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Patent number: 8212581Abstract: Inoperative or defective electroluminescent (EL) emitters in an EL display having a plurality of subpixels are detected. Current flow through a drive transistor in a subpixel is turned off, a selected test current is provided through the EL emitter in the subpixel using a current source, and the voltage at a second electrode of a readout transistor in the subpixel is measured to provide a status signal representative or characteristics of the selected EL emitter. The status signal for the subpixel is compared to the respective status signals of neighboring subpixels to determine whether the EL emitter in the subpixel is defective.Type: GrantFiled: September 30, 2009Date of Patent: July 3, 2012Assignee: Global OLED Technology LLCInventors: Charles I. Levey, Felipe A. Leon
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Patent number: 8212763Abstract: In conventional liquid crystal display controllers such as for portable telephone sets, the display is reduced in the stand-by state but the liquid crystal display duty is not changed, i.e., even the common electrodes of the rows that are not producing display are scanned, and the consumption of electric power is not decreased to a sufficient degree in the stand-by state. A liquid crystal display controller (2) includes a drive duty selection register (34) capable of being rewritten by a microprocessor (1), and a drive bias selection register (32). When the display is changed from the whole display on a liquid crystal display panel (3) to a partial display on part of the rows only, the preset values of the drive duty selection register and of the drive bias selection register are changed, so that the display is selectively produced on a portion of the liquid crystal display panel at a low voltage with a low-duty drive.Type: GrantFiled: February 22, 2010Date of Patent: July 3, 2012Assignee: Renesas Electronics CorporationInventors: Yoshikazu Yokota, Kunihiko Tani, Gorou Sakamaki, Katsuhiko Yamamoto, Takashi Yoneoka, Kazuhisa Higuchi, Kimihiko Sugiyama
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Patent number: 8212793Abstract: The invention provides a liquid crystal device including: a first substrate; a second substrate that is provided over the first substrate in such a manner that the first substrate and the second substrate face each other; a plurality of optical sensing sections that is formed in an image display area over the first substrate; and a plurality of light-amount adjusting sections that is formed in the image display area in such a manner that each of the plurality of light-amount adjusting sections includes a liquid crystal portion that overlaps the corresponding optical sensing section in a plan view, constituting a part of a liquid crystal layer that is sandwiched between the first substrate and the second substrate, the plurality of light-amount adjusting sections being capable of adjusting, independently of one another, the amount of incident light that enters the plurality of optical sensing sections through an image display surface that lies at one of two surfaces of the second substrate that does not face tType: GrantFiled: March 13, 2008Date of Patent: July 3, 2012Assignee: Seiko Epson CorporationInventor: Hideto Ishiguro
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Publication number: 20120162173Abstract: A driving method for a liquid crystal display includes providing a first gate pulse to a first gate line for driving adjacent first and second subpixels to perform charging operations, providing a second gate pulse to a second gate line for driving adjacent third and fourth subpixels to perform charging operations, providing a third gate pulse to a third gate line for driving the second subpixel to perform a charge-sharing operation, and providing a fourth gate pulse to a fourth gate line for driving the fourth subpixel to perform a charge-sharing operation. The first and second gate lines are spaced out at least one gate line. The third gate line is adjacent to the first gate line. The fourth gate line is adjacent to the second gate line. The first gate pulse, the second gate pulse, the third gate pulse and the fourth gate pulse are sequentially triggered.Type: ApplicationFiled: April 12, 2011Publication date: June 28, 2012Inventors: Chin-An Tseng, Tien-Lun Ting, Yu-Ching Wu, Yi-Cheng Li, Wen-Hao Hsu, Yen-Heng Huang, Ming-Yung Huang
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Publication number: 20120154366Abstract: A liquid crystal display device (1) includes a plurality of source bus lines (14), a plurality of gate bus lines (11) that cross the plurality of source bus lines (14), and a plurality of auxiliary capacitance lines (29) that extend in parallel with the gate bus lines (11). The liquid crystal display device (1) also includes a plurality of pixels (30) to (32) that respectively include TFTs (5), pixel electrodes (19), a common electrode (24), and a liquid crystal layer (4) and that are arranged in a matrix so as to correspond to the respective intersections of the gate bus lines (11) and the source bus lines (14). A pixel electrode (19a) for the pixel (31) is disposed in the pixel (30) that is adjacent to the pixel (31), and in a plan view, the gate bus line (11b) disposed in the pixel (31) and the pixel electrode (19a) for the pixel (31) are arranged apart from each other so as not to overlap.Type: ApplicationFiled: April 30, 2010Publication date: June 21, 2012Applicant: Sharp Kabushiki KaishaInventors: Keiichi Ina, Yoshimizu Moriya
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Patent number: 8203548Abstract: A driving circuit of a display device is provided. In a first time period of a data writing period, a control section of the driving circuit effects control so as to short-circuit a first node which is set to a target gradation potential and a node (second node) adjacent to the first node, and such that a line (second line) between the second node and a hold capacitor of a pixel is connected in parallel to a line (first line) between the first node and the hold capacitor of the pixel. Further, in a second time period following the first time period, the control section controls switching element groups so as to cancel short-circuiting between the first node and the second node, and such that the second line is not connected in parallel to the first line.Type: GrantFiled: June 13, 2007Date of Patent: June 19, 2012Assignee: Oki Semiconductor Co., Ltd.Inventors: Shigeru Nagatomo, Akira Nakayama, Akihiro Sushihara
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Patent number: 8203516Abstract: A liquid crystal display (LCD) includes a substrate, gate lines that extend in a first direction, data lines that cross the gate lines and extend in a second direction, and unit pixels. Each unit pixel includes a first subpixel electrode connected to an ith gate line by a first switching device, a second subpixel electrode connected to the ith gate line by a second switching device, and a third switching device including a drain electrode capacitively coupled to the second subpixel electrode and a source electrode connected to the first subpixel electrode. The third switching device is connected to an (i+1)th gate line, the first and second subpixel electrodes between the ith gate line and the (i+1)th gate line are arranged in an order opposite that of the first and second subpixel electrodes between the (i+I)th gate line and an (i+2)th gate line.Type: GrantFiled: December 24, 2008Date of Patent: June 19, 2012Assignee: Samsung Electronics Co., Ltd.Inventor: Seok-Woo Kim
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Patent number: 8203517Abstract: A liquid crystal display and the driving method thereof. The LCD includes a timing controller, a plurality of driver chips and a display panel. The driver chips are cascaded together for driving the display panel to display frames. A driver chip includes a differential receiver, a single-ended receiver, a shift register, a differential transmitter, a single-ended transmitter and a pixel driver. The driver chip receives a pixel signal and drives the display panel according to the pixel signal, and outputs the pixel signal to the next driver chip.Type: GrantFiled: April 8, 2009Date of Patent: June 19, 2012Assignee: Au Optronics Corp.Inventors: Chih-Sung Wang, Chih-Hsiang Yang, Chao-Liang Lu
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Patent number: 8199096Abstract: A liquid crystal display and the driving method thereof. The LCD includes a timing controller, a plurality of driver chips and a display panel. The driver chips are cascaded together for driving the display panel to display frames. A driver chip includes a differential receiver, a single-ended receiver, a shift register, a differential transmitter, a single-ended transmitter and a pixel driver. The driver chip receives a pixel signal and drives the display panel according to the pixel signal, and outputs the pixel signal to the next driver chip.Type: GrantFiled: September 17, 2008Date of Patent: June 12, 2012Assignee: AU Optronics Corp.Inventors: Chih-Sung Wang, Chih-Hsiang Yang, Chao-Liang Lu
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Patent number: 8199086Abstract: The invention comprises a stacked color photodisplay apparatus using a photosensitive cholesteric liquid crystalline material on which an image can be optically addressed, retained without degradation for an indefinite period of time, electrically erased and a new image addressed. This is similar to a photographic film except that the photodisplay film can be used over and over again similar to digital display but without the cost of addressing electronics. Included is a device for enhancing the brightness of the image and electrooptical devices for optically writing digital images on the photodisplay. Each cell in the stack can be selectively addressed with a different optical image such as the red, green and blue components of a color digital image.Type: GrantFiled: July 1, 2008Date of Patent: June 12, 2012Assignee: Kent Displays IncorporatedInventors: J. William Doane, Asad A. Khan, Erica Montbach, Nithya Venkataraman
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Patent number: 8199097Abstract: A liquid crystal display and the driving method thereof. The LCD includes a timing controller, a plurality of driver chips and a display panel. The driver chips are cascaded together for driving the display panel to display frames. A driver chip includes a differential receiver, a single-ended receiver, a shift register, a differential transmitter, a single-ended transmitter and a pixel driver. The driver chip receives a pixel signal and drives the display panel according to the pixel signal, and outputs the pixel signal to the next driver chip.Type: GrantFiled: April 15, 2009Date of Patent: June 12, 2012Assignee: AU Optronics Corp.Inventors: Chih-Sung Wang, Chih-Hsiang Yang, Chao-Liang Lu
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Patent number: 8194018Abstract: One embodiment of the present invention provides a liquid crystal display device in which auxiliary capacitance lines are driven, thereby allowing the range of drive voltage to be kept narrow while increasing the difference between the maximum and minimum absolute values of voltage to be applied to liquid crystal, and in the present liquid crystal display device, the voltage ranges for an auxiliary capacitance line drive signal, a video signal, and a common potential are equally maintained as low as from 0V to 4V, while inverting the common potential every scanning period and causing the potential of the auxiliary capacitance line drive signal to rise in the same direction as the common potential at the time of the fall of the scanning signal such that the potential is maintained until the next frame.Type: GrantFiled: December 7, 2007Date of Patent: June 5, 2012Assignee: Sharp Kabushiki KaishaInventor: Hisashi Nagata
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Patent number: 8184081Abstract: A pixel unit, a method for controlling the pixel unit, and a display apparatus having the same are provided. The display apparatus includes a driving circuit and a plurality of pixel units. Each of the pixel unit includes a switch circuit and an energy storage circuit. The energy storage circuit has a first end, a second end, and a third end. The first end is coupled to the switch circuit. The second end is electrically connected to the driving circuit so that the drive circuit is able to provide a first voltage to the second end. The third end is electrically connected to the driving circuit so that the driving circuit is able to provide a second voltage and a third voltage to the third end before the first voltage transits. There is a difference between the second voltage and the third voltage in order to generate a voltage oscillation with in the pixel unit. Therefore, the problem of color washout can be solved.Type: GrantFiled: March 20, 2008Date of Patent: May 22, 2012Assignee: Au Optronics Corp.Inventor: Meng-Chang Tsai
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Patent number: 8179350Abstract: A display device including a plurality of pixel electrodes arranged in a matrix including rows and columns and a plurality switching elements coupled with the pixel electrodes; a plurality of gate lines coupled with the switching elements and extending in a row direction, at least two gate lines assigned to a row; and a plurality of data lines coupled with the switching elements and extending in a column direction, a data line assigned to at least two columns, wherein each of the pixel electrodes has a first side and a second side that is farther from a data line than the first side, and the switching elements are disposed near the second sides of the pixel electrodes.Type: GrantFiled: September 12, 2005Date of Patent: May 15, 2012Assignee: Samsung Electronics Co., Ltd.Inventors: Haeng-Won Park, Seong-Young Lee, Yong-Soon Lee, Nam-Soo Kang, Seung-Hwan Moon, Bong-Jun Lee, Sung-Man Kim, Beom-Jun Kim, Yeon-Kyu Moon, Hyeong-Jun Park, Shin-Tack Kang
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Patent number: 8179351Abstract: A liquid crystal display and a method of driving the same are disclosed. A timing controller of the liquid crystal display controls a polarity control signal to have a different phase in each frame and allows liquid crystal cells to be divided into a first liquid crystal cell group charged to a data voltage of a same polarity during two frame periods and a second liquid crystal cell group charged during a current frame period to the data voltage with a polarity opposite a polarity of the data voltage charged during a previous frame period. The liquid crystal cells belonging to the first liquid crystal cell group are successively charged to the data voltage of the same polarity during three or more frame periods at intervals of a predetermined time equal to or longer than two frame periods.Type: GrantFiled: December 23, 2008Date of Patent: May 15, 2012Assignee: LG Display Co., Ltd.Inventors: Hongsung Song, Woongki Min, Yonggi Son, Suhyuk Jang
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Publication number: 20120113083Abstract: A method of driving a display device by using a pixel voltage corresponding to a difference between a common voltage and a data voltage comprises: operations of charging the pixel voltage by the common voltage and the data voltage having opposite polarities; and discharging the pixel voltage in a period where the polarity of the common voltage is reversed.Type: ApplicationFiled: March 17, 2011Publication date: May 10, 2012Applicant: SAMSUNG MOBILE DISPLAY CO., LTD.Inventors: Il-Nam Kim, Jae-Ik Lim, Won-Sang Park
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Patent number: 8174517Abstract: An integrated circuit device includes: a plurality of data line driving circuits that drive a plurality of data voltage supply lines; a comparator that compares a data voltage corresponding to a data line driving circuit to be corrected among the plurality of data line driving circuits with a comparator reference voltage; a correction data calculation section that calculates correction data for correcting a difference in the data voltage based on a comparison result given from the comparator; and a plurality of correction circuits that each correct image data based on the correction data given from the correction data calculation section, and output the image data after correction processing to a corresponding data line driving circuit among the plurality of data line driving circuits.Type: GrantFiled: August 27, 2009Date of Patent: May 8, 2012Assignee: Seiko Epson CorporationInventor: Akira Morita
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Publication number: 20120105397Abstract: The present invention provides a shift register unit, a gate driving device and a liquid crystal display, wherein the shift register unit includes five thin film transistors. The drain of a first thin film transistor is connected to a first clock signal input terminal; the drain of a third thin film transistor is connected to the first clock signal input terminal, the gate thereof is connected to the gate of the first thin film transistor, and the source thereof is connected to a second signal output terminal. The shift register unit, the gate driving device and the liquid crystal display provided by the present invention separate the gate driving signal and the control signal for controlling the next neighboring shift register unit from each other, which can solve the problem that the accuracy of the gate driving signal is low due to the delay accumulation.Type: ApplicationFiled: October 28, 2011Publication date: May 3, 2012Applicants: CHENGDU BOE OPTOELECTRONICS TECHNOLOGY CO., LTD., BOE TECHNOLOGY GROUP CO., LTD.Inventors: Wen TAN, Xiaojing QI, Weiyun HUANG
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Patent number: 8169391Abstract: A display apparatus includes a plurality of pixels. Each pixel includes a main pixel, a sub-pixel, and a boosting capacitor. The main pixel receives a data signal in response to a first gate signal and is charged with a main pixel voltage. The sub-pixel receives the data signal in response to a second gate signal, and is charged with a sub-pixel voltage. The boosting capacitor is provided between the main pixel and the sub-pixel to increase the main pixel voltage when the sub-pixel is charged with the sub-pixel voltage in response to the second gate signal.Type: GrantFiled: December 1, 2008Date of Patent: May 1, 2012Assignee: Samsung Electronics Co., Ltd.Inventors: Jun-Pyo Lee, Jung-Won Kim, Byoung-Jun Lee
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Patent number: 8164550Abstract: In a display device used in a compact mobile apparatus that uses a battery or the like as the poser supply, the display device consumes less power even when the display state is not switched for a long period of time. A memory element is provided in each pixel, but the number of the parts does not increase and the aperture ratio is maintained at a high level. A low power-consumption liquid crystal display device is achieved by providing the memory element in each pixel and transferring no image signal. The voltage held in the pixel memory in the liquid crystal display panel is used to generate an alternating drive signal in the pixel. Even when the image signal is not rewritten, the alternating drive avoids liquid crystal degradation and performs display operations. The simply configured memory element allows a liquid crystal display device without aperture ratio penalty to be achieved.Type: GrantFiled: February 1, 2007Date of Patent: April 24, 2012Assignees: Hitachi Displays, Ltd., Panasonic Liquid Crystal Display Co., Ltd.Inventors: Toshio Miyazawa, Hideo Sato
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Patent number: 8164544Abstract: A pixel array layout includes a substrate, a plurality of scan lines disposed on the substrate, a plurality of data lines disposed on the substrate, a plurality of pixel units disposed on the substrate, and a pre-discharge conductive layer. Each of the pixel units is electrically connected to at least one of the scan lines and one of the data lines correspondingly, and each of the pixel units has a driving circuit and a pixel electrode electrically connected to the driving circuit. The pre-discharge conductive layer is electrically connected to the driving circuit and extends to an area between two adjacent pixel electrodes from an edge of the substrate, and the pre-discharge conductive layer and the pixel electrodes do not overlap.Type: GrantFiled: July 21, 2009Date of Patent: April 24, 2012Assignee: Industrial Technology Research InstituteInventors: Chen-Wei Lin, Yen-Shih Huang
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Publication number: 20120092321Abstract: An LCD includes a first pixel electrode coupled to a first scan line and a data line, and a second pixel electrode coupled to a second scan line and the data line. A first and a second storage capacitor electrode lines are at two sides of the data line and across the scan lines. A first storage capacitor electrode extension line is extended out of the first storage capacitor electrode line and toward the data line, and a second storage capacitor electrode extension line is extended out of the second storage capacitor electrode line and toward the data line. The first pixel electrode and second pixel electrode partly overlap the first and the second storage capacitor electrode extension lines, respectively. Since the storage capacitor electrode line and the scan line is formed on different metal layer, a gap between the storage capacitor electrode line and the scan line is shortened.Type: ApplicationFiled: February 16, 2011Publication date: April 19, 2012Applicant: CHUNGHWA PICTURE TUBES, LTD.Inventors: YEN-FEN LIN, Yi-cheng Tsai
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Publication number: 20120092240Abstract: An active device, a pixel structure, and a display panel are provided. The pixel structure includes a scan line, a data line, an active device, a first insulating layer, a pixel electrode, a capacitor electrode, and a second insulating layer. The active device includes a gate, a channel, a source, and a drain. The gate is electrically connected to the scan line. The source is electrically connected to the data line. The first insulating layer is disposed between the gate and the channel. The pixel electrode is electrically connected to the drain. The capacitor electrode is located on the first insulating layer. The second insulating layer is located between the capacitor electrode and the drain.Type: ApplicationFiled: December 19, 2011Publication date: April 19, 2012Applicant: AU OPTRONICS CORPORATIONInventors: Chih-Hung Lin, Wu-Liu Tsai, Chuan-Sheng Wei, Che-Chia Chang, Sheng-Chao Liu, Yu-Cheng Chen, Yi-Hui Li, Maw-Song Chen
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Patent number: 8159429Abstract: A liquid crystal display (“LCD”) capable of improving display quality includes a first insulating substrate, gate wiring lines formed on the first insulating substrate and extending in a first direction, data wiring lines insulated from and crossing the gate wiring lines and extending in a second direction, and pixel electrodes, each of which includes first and second sub-pixel electrodes that are applied with different data voltages from the data wiring lines, in which at least a part of the second sub-pixel electrode overlaps the data wiring lines.Type: GrantFiled: July 17, 2007Date of Patent: April 17, 2012Assignee: Samsung Electronics Co., Ltd.Inventors: Dong-gyu Kim, Seong-young Lee, Sung-jae Moon, Hye-seok Na
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Patent number: 8159484Abstract: A liquid crystal device includes a lateral electric field mode liquid crystal element that controls alignment of liquid crystal molecules by applying an electric field in a direction of a substrate plane to a liquid crystal layer. A voltage inverter circuit is provided in each pixel circuit, and inverts a voltage applied to the liquid crystal element by switching the supply of each of the first and second voltages, supplied from a memory circuit, to between a first pixel electrode and a second pixel electrode of the liquid crystal element. A holding capacitor holds a voltage applied to the liquid crystal element. The voltage inverter circuit includes switching elements. One end of the holding capacitor is connected to at least one of a common connecting point of first and second switching elements and a connecting point of third and fourth switching elements.Type: GrantFiled: February 28, 2008Date of Patent: April 17, 2012Assignee: Seiko Epson CorporationInventor: Kenya Watanabe
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Patent number: 8159488Abstract: A display apparatus includes a display panel, a printed circuit board, a data driver and a gate driver. The data driver includes a digital processor and an analog processor, and receives image data and a data control signal to provide the display panel with a data signal. The printed circuit board includes a first voltage interconnection which supplies a first source supply voltage to the digital processor of the data driver, and a second voltage interconnection electrically isolated from the first voltage interconnection and which supplies a second source supply voltage to the analog processor of the data driver.Type: GrantFiled: March 26, 2009Date of Patent: April 17, 2012Assignee: Samsung Electronics Co., Ltd.Inventor: Kyung-Yul Kim
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Patent number: 8154701Abstract: A liquid crystal display device includes first and second substrates facing each other and attached to each other with a cell-gap therebetween, gate lines and data lines arranged horizontally and vertically on the first substrate, first lines formed on the first substrate, connected to the gate lines or the data lines, and each having a link bending point and bent at an angle, a TCP electrically attached to the first substrate, and second lines formed on the TCP and electrically connected to the first lines respectively. At least one link bending point is positioned at a region of the TCP.Type: GrantFiled: August 19, 2004Date of Patent: April 10, 2012Assignee: LG Display Co., Ltd.Inventor: Jin Cheol Hong
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Patent number: 8154507Abstract: A back light system and a liquid crystal display device, which can reduce the power consumption substantially, are provided. The power consumption can be substantially reduced by providing a plurality of light-emitting dividing parts to which area division of the light emitting surface which illuminates with light towards a liquid crystal panel is performed, and controlling the luminescent brightness in the light-emitting dividing parts according to the corresponding display image of a display area in the liquid crystal panel.Type: GrantFiled: January 22, 2009Date of Patent: April 10, 2012Assignee: Rohm Co., Ltd.Inventor: Noriyuki Shimoji
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Patent number: 8144097Abstract: A display device displays images with a plurality of signal lines and includes spare lines, each being arranged to be connectable to the signal lines so as to be used for recovery of the signal lines from disconnection. Each of the spare lines has constricted sections for cutting. With this arrangement, it is possible to easily and properly recover the signal lines from disconnection.Type: GrantFiled: September 13, 2011Date of Patent: March 27, 2012Assignee: Sharp Kabushiki KaishaInventor: Hidetoshi Nakagawa
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Patent number: 8134532Abstract: An image display apparatus includes an image displaying unit that includes a light source unit and a light modulation device, a histogram generating unit, a light source luminance calculator, a function storing unit, a first evaluation value calculator, a second evaluation value calculator, a third evaluation value calculator, a function acquiring unit and a control unit. The function acquiring unit acquires a plurality of the third evaluation values by repeating processing by the first to third evaluation value calculators with modification to a level conversion function and acquires a level conversion function that has a smallest third evaluation. The control unit supplies a signal of a converted video resulting from conversion of the image with the acquired level conversion function to the light modulation device.Type: GrantFiled: October 30, 2008Date of Patent: March 13, 2012Assignee: Kabushiki Kaisha ToshibaInventors: Masahiro Baba, Goh Itoh
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Publication number: 20120050245Abstract: In the field of a liquid crystal on silicon (LCoS) display, a charge sharing system and a charge sharing method of an LCoS display are provided. The system includes: a column driving circuit, a row driving circuit, a pixel matrix, a control circuit, a gamma reference voltage circuit, and a first switching module. The column driving circuit includes a second switching module, a buffer, a shift register, a latch, and a digital-to-analog (D/A) converter. The second switching module is serially connected between the D/A converter and the buffer. The control circuit simultaneously outputs a signal for controlling turn-off of the buffer, a signal for controlling turn-off of a switch in the second switching module, and a signal for controlling turn-off of the gamma reference voltage circuit. The control circuit outputs a signal for controlling turn-on of a switch in the first switching module. The control circuit outputs a signal for controlling the row driving circuit.Type: ApplicationFiled: September 16, 2010Publication date: March 1, 2012Applicant: SHENZHEN YANGTZE LIVE CO., LTD.Inventors: Yongping Dai, Xuhuai Dong, Wei Fan, Yi Fan
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Patent number: 8125472Abstract: A display device responsive to a controller, including a substrate having a display area; a two-dimensional array of pixels formed on the substrate in the display area, each pixel comprising an optical element and a driving circuit for controlling the optical element in response to selected pixel information; a two-dimensional array of selection circuits located in the display area, each associated with one or more pixels, for selecting pixel information provided by the controller, wherein each selection circuit receives the provided pixel information, selects pixel information corresponding to its associated pixel(s) in response to the provided pixel information, and provides the selected pixel information to the corresponding driving circuit(s); and a parallel signal conductor electrically connecting the selection circuits in common for transmitting pixel information provided by the controller to each of the selection circuits.Type: GrantFiled: June 9, 2009Date of Patent: February 28, 2012Assignee: Global OLED Technology LLCInventors: Ronald S. Cok, Christopher J. White