Thin Film Tansistor (tft) Patents (Class 345/92)
  • Patent number: 8810765
    Abstract: An electroluminescence element includes an electroluminescence substrate including a thin film transistor substrate, and a light-emitting layer provided over the thin film transistor substrate and divided by picture-element separating portions so as to correspond to unit picture elements; and a sealing substrate arranged to hermetically seal the light-emitting layer of the electroluminescence substrate. At least one of the electroluminescence substrate and the sealing substrate is a flexible substrate. Spacers are provided between the electroluminescence substrate and the sealing substrate.
    Type: Grant
    Filed: January 11, 2008
    Date of Patent: August 19, 2014
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Tohru Okabe, Hirohiko Nishiki
  • Patent number: 8810491
    Abstract: An LCD panel with color washout improvement. In one embodiment, the LCD panel includes a plurality of pixels spatially arranged in a matrix form, each pixel defined between a respective pair of scanning lines (Gn, Gn—CS) and two neighboring data lines Dm and Dm+1, comprising a pixel electrode, a first transistor electrically coupled to the scanning lines Gn, the date line Dm and the pixel electrode, and a second transistor electrically coupled to the scanning lines Gn—CS and the pixel electrode such that when N pairs of scanning signals to the N pairs of scanning lines {Gn, Gn—CS} and a plurality of data signals to the data lines, the pixel electrode of each pixel has a first voltage at the first duration of a frame period, and a second voltage at the second duration of the frame period, respectively. The first and second voltages are substantially different from each other.
    Type: Grant
    Filed: October 20, 2011
    Date of Patent: August 19, 2014
    Assignee: Au Optronics Corporation
    Inventors: Yu-Ching Wu, Tien-Lun Ting, Kun-Cheng Tien, Chien-Huang Liao, Wen-Hao Hsu
  • Patent number: 8810483
    Abstract: The active matrix display includes a matrix of pixel elements wherein a pixel element includes at least one nonlinear element. The nonlinear element in the pixel element comprises a supplementary resistor serially connected to one of a PN diode and a PIN diode. The method of driving a pixel element comprises charging the capacitive element in the pixel element through the semiconductor channel of the switching transistor in the pixel element and through the at least one nonlinear element while the semiconductor channel of the switching transistor maintains at the conducting state and the at least one nonlinear element maintains at the conducting state.
    Type: Grant
    Filed: September 5, 2011
    Date of Patent: August 19, 2014
    Inventor: Nongqiang Fan
  • Patent number: 8810607
    Abstract: The invention relates to a flexible display comprising a first flexible layer configured to comprise pixels 5 of the flexible display, a second flexible layer superposed on the first flexible layer, which second flexible layer comprises a color filter with a plurality of color elements 1, 2, 3, 4 associated with said pixels, wherein the pixels comprise color sub-pixels 1a, 2a, 3a, 4a, the color elements and/or color sub-pixels being discontinuously arranged to counteract misalignment between respective color sub-pixels and color elements. The color elements 1, 2, 3, 4 are arranged to substantially overlap respective sub-pixels 1a, 2a, 3a, 4a whereby the buffer zones 6a, 6b, 6c, 6d are arranged to overlap a portion of said sub-pixels as well. The invention further relates to a method of manufacturing a flexible display.
    Type: Grant
    Filed: August 22, 2008
    Date of Patent: August 19, 2014
    Assignee: Creator Technology B.V.
    Inventors: Erik van Veenendaal, Nicolaas Aldegonda Jan Maria van Aerle, Hjalmar Edzer Ayco Huitema
  • Patent number: 8803855
    Abstract: A liquid crystal display includes a plurality of pixels. Each pixel of the plurality of pixels includes a gate line which receives a gate signal; a data line which receives a data voltage; a first sub-pixel including a first transistor connected to the gate line and the data line, wherein the first transistor outputs the data voltage in response to the gate signal; and a first liquid crystal capacitor connected to the first transistor. Each pixel further includes a second sub-pixel including a second transistor connected to the gate line and the data line, wherein the second transistor outputs the data voltage in response to the gate signal; and a second liquid crystal capacitor connected to the second transistor; a resistor connected to the second transistor; and a first sharing capacitor connected to the resistor, wherein the first sharing capacitor receives the data voltage through the resistor.
    Type: Grant
    Filed: September 13, 2010
    Date of Patent: August 12, 2014
    Assignee: Samsung Display Co., Ltd.
    Inventors: Joon-Chul Goh, Young-Soo Yoon, Soo-Wan Yoon, Chongchul Chai
  • Patent number: 8803781
    Abstract: A single-crystal semiconductor layer is separated from a single-crystal semiconductor substrate and is fixed to an insulating substrate to form a TFT over the insulating substrate. Then, a driver circuit is formed using the TFT. The TFT has excellent current characteristics because an active layer is almost in a single-crystal state. Accordingly, a small thin display device with low power consumption can be manufactured. Further, a controller and a shift register which is included in a source driver are operated at the same power supply voltage. Thus, power consumption can be reduced.
    Type: Grant
    Filed: March 25, 2008
    Date of Patent: August 12, 2014
    Assignee: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Hajime Kimura, Atsushi Umezaki
  • Patent number: 8803784
    Abstract: A gate driver is provided with an odd-numbered stage shift register, an even-numbered stage shift register, and main lines including clock signal main lines. In at least one example embodiment, each stage of one of the shift registers receives the first clock and the second clock from the clock signal main lines, and the third clock and the fourth clock from an adjacently provided stage of the other shift register. Each stage of the shift register can receive the second clock from a different stage of the same shift register. With this, it is possible to reduce a picture-frame area of a panel in a display device provided with a scanning signal line drive circuit having the plurality of shift registers.
    Type: Grant
    Filed: February 17, 2010
    Date of Patent: August 12, 2014
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Mayuko Sakamoto, Yasuaki Iwase
  • Patent number: 8803777
    Abstract: 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: Grant
    Filed: March 29, 2013
    Date of Patent: August 12, 2014
    Assignee: Samsung Display Co., Ltd.
    Inventors: Hee-Wook Do, Seung-Beom Park, Hoon Kim, Hye-Ran You, Jian Gang Lu, Hee-Seop Kim, Young-Chol Yang, Seoung-Hoon Lee
  • Patent number: 8797309
    Abstract: A liquid crystal display device includes: a plurality of pixel circuits which is arranged in a matrix shape; a plurality of data lines; a selection unit which sequentially selects the plurality of pixel circuits for every group which is fewer in number than the number of rows of the pixel circuits; a control unit which sequentially changes the pixel circuits included in the groups; and a data signal supply unit which outputs a data signal to each data line. Each of the plurality of sequentially selected pixel circuits is connected to each of the different data lines.
    Type: Grant
    Filed: August 3, 2010
    Date of Patent: August 5, 2014
    Assignees: Japan Display Inc., Panasonic Liquid Crystal Display Co., Ltd.
    Inventor: Yoshihisa Ooishi
  • Patent number: 8796785
    Abstract: To suppress variation of a signal in a semiconductor device. By suppressing the variation, formation of a stripe pattern in displaying an image on a semiconductor device can be suppressed, for example. A distance between two adjacent signal lines which go into a floating state in different periods (G1) is longer than a distance between two adjacent signal lines which go into a floating state in the same period (G0, G2). Consequently, variation in potential of a signal line due to capacitive coupling can be suppressed. For example, in the case where the signal line is a source signal line in an active matrix display device, formation of a stripe pattern in a displayed image can be suppressed.
    Type: Grant
    Filed: January 12, 2011
    Date of Patent: August 5, 2014
    Assignee: Semiconductor Energy Laboratory Co., Ltd.
    Inventor: Hideaki Shishido
  • Patent number: 8797244
    Abstract: A display device includes first and second pixels, first and second gate lines which transfer first and second gate-on voltages, respectively, to the first and second pixels in a first frame and a second frame, respectively, a first data line which transfers a first data voltage to the first pixel in the second frame and a second data line which transfers a second data voltage to the second pixel in the first frame. The first pixel stores the first data voltage as a first stored data voltage in response to the first gate-on voltage and discharges the first stored data voltage in response to the second gate-on voltage. The second pixel stores the second data voltage as a second stored data voltage in response to the second gate-on voltage and discharges the second stored data voltage in response to the first gate-on voltage.
    Type: Grant
    Filed: October 1, 2008
    Date of Patent: August 5, 2014
    Assignee: Samsung Display Co., Ltd.
    Inventors: Jun-Pyo Lee, Jung-Hwan Cho
  • Patent number: 8797240
    Abstract: A display device including: pixels, each provided with first to fourth transistors, a light-emitting element, a control terminal of the fourth transistors is connected to a scanning line, a second electrically-conductive terminal of the second transistor, a first electrically-conductive terminal of the third transistor, a control terminal of the third transistor are connected to each other; and a second control line (AZC) shared commonly by at least two pixels. The at least two pixels being such that the fourth transistors of the at least two pixels are connected to different scanning lines, and second electrically-conductive terminals of the third transistors of the at least two pixels are connected to the second control line, the at least two pixels being such that the third transistors of the at least two pixels are concurrently turned ON, after the first transistors of the at least two pixels are sequentially turned OFF.
    Type: Grant
    Filed: December 13, 2010
    Date of Patent: August 5, 2014
    Assignee: Sharp Kabushiki Kaisha
    Inventor: Noritaka Kishi
  • Patent number: 8797249
    Abstract: A thin-film transistor (TFT) array structure and a liquid crystal display (LCD) panel thereof are described. The TFT array structure includes a plurality of scan lines, a plurality of first data lines, a plurality of second data lines, a plurality of pixel units and a plurality of control module. Each of the control modules is coupled among the scan line, one second data line and one pixel unit. The second data line charges the later control module when the scan line is selected to be activated for charging the pixel unit by the first data line. The charged later control module charges another pixel unit when the scan line is inactivated and another scan line is selected to be activated for charging another pixel unit by the first data line. The TFT array structure can reduce the charging duration of the pixels.
    Type: Grant
    Filed: June 20, 2011
    Date of Patent: August 5, 2014
    Assignee: Shenzhen China Star Optoelectronics Technology Co., Ltd.
    Inventors: Shiqi Li, Jiali Jiang, Haiying He
  • Publication number: 20140210868
    Abstract: The present invention provides a liquid crystal display device including gate lines extending on a substrate; data lines crossing the gate lines to define a plurality of pixels; a thin film transistor in each pixel; and a liquid crystal capacitor in each pixel region, an electrode of the liquid crystal capacitor is connected to the thin film transistor, wherein the thin film transistors of a (2a?1)th pixel and a (2a)th pixel in a (2b)th pixel column share a (2a)th gate line, and the thin film transistors in a (2a)th pixel and a (2a+1)th pixel in a (2b+1)th pixel column share a (2b+1)th gate line, and wherein each of a and b is a positive integer.
    Type: Application
    Filed: December 30, 2013
    Publication date: July 31, 2014
    Applicant: LG DISPLAY CO., LTD.
    Inventors: Su-Hong CHO, Sang-Bum KO, Jun-Yeob LEE, Soo-Ho KIM, Moon-Chul KIM, Sung-Woo LEE, Hyun-Jik BAE
  • Publication number: 20140210877
    Abstract: Embodiments of the present invention provide an array substrate and a driving method thereof and a display device. The array substrate includes multiple pixel groups arranged in a matrix form, multiple rows of gate lines arranged transversely which are corresponding to the pixel groups, and multiple columns of first and second data lines arranged longitudinally, wherein each pixel group includes a first pixel unit and a second pixel unit which are located in two adjacent rows; the gate line is connected to the first and second pixel unit in the corresponding pixel group respectively, the first and second data lines are respectively connected with the first and second pixel units in the corresponding pixel group to provide data signals to the first and second pixel units; wherein, the gate lines on the periphery of the pixel units are formed by metal of the same layer.
    Type: Application
    Filed: December 27, 2013
    Publication date: July 31, 2014
    Inventors: Yue LI, Yanna Xue, Lei Wang
  • Patent number: 8791894
    Abstract: Systems and methods may provide for determining an operating mode of a display device that may include a flat panel display and a controller coupled to the flat panel display. The controller may be configured to determine an operating mode for the flat panel display among a plurality of operating modes including at least a first operating mode and a second operating mode. In the first operating mode, the controller may set the flat panel display to utilize a first frame rate and a first inversion mode to save power. In the second operating mode, the controller may set the flat panel display to utilize a second frame rate, a second inversion mode, and black frame insertion to improve image quality. The second frame rate may be faster than the first frame rate. The second inversion mode and black frame insertion may be mutually configured to maintain a DC balanced operation of the flat panel display.
    Type: Grant
    Filed: December 28, 2012
    Date of Patent: July 29, 2014
    Assignee: Intel Corporation
    Inventors: Akihiro Takagi, Cheng-Shih Chin, Yanli Zhang, Maximino Vasquez
  • Patent number: 8791969
    Abstract: A display device includes a first display panel facing a second display panel with a liquid crystal layer between them. The first display panel has a first gate line, a second gate line spaced apart from the first gate line, a first and second storage lines both spaced apart from the first gate line, first and second switching elements controlled by a first gate signal applied through the first gate line, a first sub-pixel electrode connected to the first switching element, a second sub-pixel electrode connected to the second switching element, a third switching element controlled by a second gate signal applied through the second gate line, and a coupling electrode connected to the third switching element and having a portion overlapping the second storage line. Different voltages are applied to the first storage line and the second storage line.
    Type: Grant
    Filed: June 10, 2011
    Date of Patent: July 29, 2014
    Assignee: Samsung Display Co., Ltd.
    Inventors: Yong-Jo Kim, Yoon-Jang Kim, Yoon-Sung Um, Jong-Hee Na, Young-Min Choi
  • Publication number: 20140204009
    Abstract: A gate driver includes a plurality of stages, wherein an n-th stage includes: a pull-up unit configured to output a high voltage of a clock signal as a high voltage of an n-th gate signal; a pull-down unit configured to decrease the high voltage of the n-th gate signal to a first low voltage; a discharging unit configured to discharge a voltage of the first node to a second low voltage lower than the first low voltage; a carry unit configured to output the high voltage of the clock signal as an n-th carry signal; an inverter unit configured to output a signal in synchronization with the clock signal; a first node storage unit configured to maintain the voltage of the first node at the second low voltage; and a second node storage unit configured to maintain the voltage of the second node at the first or second low voltage.
    Type: Application
    Filed: June 28, 2013
    Publication date: July 24, 2014
    Inventors: Kang Nam Kim, Duc-Han Cho, You Mee Hyun, Jeong-II Kim, Jong Woong Chang
  • Patent number: 8786532
    Abstract: A method for driving a pixel electrode disposed on a first substrate operates by providing a voltage corresponding to a displaying data to the pixel electrode and a control electrode, such that the pixel electrode and the control electrode are at a floating connection state; providing a first coupling voltage to a coupling electrode; and coupling a variation of a first coupling voltage to the control electrode via at least one coupling capacitor, such that an absolute value of a voltage difference between the control electrode and a common electrode substantially greater than an absolute value of a voltage difference between the pixel electrode and the common electrode, wherein the common electrode is disposed on a second substrate and the second substrate is corresponding to the first substrate.
    Type: Grant
    Filed: June 13, 2012
    Date of Patent: July 22, 2014
    Assignee: Au Optronics Corp.
    Inventors: Jenn-Jia Su, Ming-Feng Tien, Chia-Jung Yang, Ting-Jui Chang, Po-Lun Chen
  • Patent number: 8786533
    Abstract: A pulse is input to first and second TFTs to turn ON the first and second TFTs so that the potential of a node a rises. When the potential of the node a reaches (VDD?VthN), the node ? enters a floating state. Accordingly, a third TFT then turns ON, and potential of an output node rises as a clock signal reaches the level H. On the other hand, potential of a gate electrode of the third TFT further rises due to an operation of capacitance as the potential of the output node rises, so that the potential of the output node would be higher than (VDD+VthN). Thus, the potential of the output node rises to VDD without voltage drop caused by a threshold of the third TFT.
    Type: Grant
    Filed: September 6, 2012
    Date of Patent: July 22, 2014
    Assignee: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Munehiro Azami, Shou Nagao, Yoshifumi Tanada
  • Patent number: 8786542
    Abstract: A display device is disclosed which is capable of suppressing characteristic changes due to a long period of conduction, thereby achieving high-quality video display, and also to provide a drive method therefor. In at least one embodiment, while sequentially activating n first scanning signal line groups G1(1) to G1(n), a predetermined voltage, which is the same as a voltage for turning off a thin-film transistor included in each pixel formation portion in that the polarity thereof is negative and is at a higher level than that voltage, is applied simultaneously to n second scanning signal line groups G2(1) to G2(n). Thereafter, while sequentially activating the n second scanning signal line groups G2(1) to G2(n), the predetermined voltage is applied simultaneously to the n first scanning signal line groups G1(1) to G1(n). By repeating this, charges accumulated in the vicinity of the thin-film transistors are eliminated, thereby suppressing changes in off characteristics thereof.
    Type: Grant
    Filed: January 3, 2009
    Date of Patent: July 22, 2014
    Assignee: Sharp Kabushiki Kaisha
    Inventor: Takashi Morimoto
  • Patent number: 8786534
    Abstract: According to one embodiment, a liquid crystal display device includes a first substrate including a first gate line and a second gate line, a storage capacitance line, a first source line and a second source line, a switching element, and a pixel electrode surrounded by the first gate line, the second gate line, the first source line and the second source line, the pixel electrode including a contact portion which is put in contact with the switching element, a first main pixel electrode and a second main pixel electrode, a second substrate including a common electrode and a liquid crystal layer held between the first substrate and the second substrate.
    Type: Grant
    Filed: September 13, 2012
    Date of Patent: July 22, 2014
    Assignee: Japan Display Inc.
    Inventors: Masato Kesho, Masanobu Nonaka, Kazuhiro Takahashi, Toshimasa Yonekura
  • Publication number: 20140198022
    Abstract: A driving module with a common control node according to the present invention is revealed. The driving module comprises a plurality of output units, a forward input unit and a reverse input unit. The output units are all coupled to a control node to share the control node. The output units output forward scanning signals sequentially according to the charge of the control node when the control node is charged by the forward input unit. The output units output reverse scanning signals sequentially according to the charge of the control node when the control node is charged by the reverse input unit. Thus, the present invention is provided to output forward or reverse scanning signals from the output units by sharing the control node so as to decrease the circuit area in the driving module.
    Type: Application
    Filed: April 25, 2013
    Publication date: July 17, 2014
    Applicant: GIANTPLUS TECHNOLOGY CO., LTD.
    Inventors: KAI-JU CHOU, CHE-YAO WU, KU-HUANG LAI, PO-CHUN HUANG
  • Patent number: 8780028
    Abstract: An assembly includes a substrate, scanning electrodes and sense electrodes disposed on the substrate, and color filter and black matrix disposed in an arrangement on the scanning electrodes and sense electrodes. The scanning electrodes and sense electrodes are disposed between the substrate and the arrangement.
    Type: Grant
    Filed: January 27, 2012
    Date of Patent: July 15, 2014
    Assignee: BlackBerry Limited
    Inventor: Jackson Chi Sun Lai
  • Patent number: 8780021
    Abstract: A pixel, a display device using the pixel and a method of driving the display device are provided. The pixel may include an organic light emitting diode, a driving circuit for generating and transmitting driving current depending on data signals to the organic light emitting diode, and at least one switch connected between a power wire for applying a first voltage to the organic light emitting diode and a data line for transmitting the data signals. The at least one switch may include a compensating circuit for electronically connecting the power wire to the data line for a predetermined period to transmit the first voltage through the data line.
    Type: Grant
    Filed: February 29, 2012
    Date of Patent: July 15, 2014
    Assignee: Samsung Display Co., Ltd.
    Inventor: Sang-Myeon Han
  • Publication number: 20140191934
    Abstract: There are provided a driving circuit of a semiconductor display device which can obtain an excellent picture without picture blur (display unevenness) and with high fineness/high resolution, and the semiconductor display device. A buffer circuit used in the driving circuit of the semiconductor display device is constituted by a plurality of TFTs each having a small channel width, and a plurality of such buffer circuits are connected in parallel with each other.
    Type: Application
    Filed: January 13, 2014
    Publication date: July 10, 2014
    Applicant: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Jun KOYAMA, Shunpei YAMAZAKI
  • Publication number: 20140191935
    Abstract: The invention provides a liquid crystal display device that includes an IGZO-GDM which can quickly remove a residual charge in a panel when the power supply is turned off, and a driving method of the liquid crystal display device. Each bistable circuit that configures a shift register includes a thin film transistor TI for increasing a potential of an output terminal based on a first clock, a region netA connected to a gate terminal of the thin film transistor TI, a thin film transistor TC for lowering a potential of the region netA, and a region netB connected to a gate terminal of the thin film transistor TC. In such a configuration, a power supply off sequence includes a display off sequence and a gate off sequence. The gate off sequence includes at least a gate-bus-line discharge step (t14 to t15), a netB discharge step (t15 to t16), and a netA discharge step (t16 to t17).
    Type: Application
    Filed: August 3, 2012
    Publication date: July 10, 2014
    Applicant: SHARP KABUSHIKI KAISHA
    Inventors: Hideki Morii, Akihisa Iwamoto, Satoshi Horiuchi, Takayuki Mizunaga, Kazuya Nakaminami
  • Patent number: 8773339
    Abstract: A method of driving a display panel includes applying a common voltage to the display panel, sensing a frequency of the display panel to generate a frequency signal, adjusting a gain of an operational amplifier based on the frequency signal, receiving a feedback common voltage from the display panel, and compensating the common voltage using an input resistor, the operational amplifier and a feedback resistor based on the feedback common voltage to apply the compensated common voltage to the display panel. The operational amplifier includes an inverting input terminal connected to the input resistor, a non-inverting input terminal to which a reference common voltage is applied and an output terminal. The feedback resistor is between the inverting input terminal and the output terminal.
    Type: Grant
    Filed: August 15, 2011
    Date of Patent: July 8, 2014
    Assignee: Samsung Display Co., Ltd.
    Inventors: Young-Su Kim, Jae-Hoon Lee, Chang-Ho Lee, Yu-Han Bae
  • Patent number: 8773341
    Abstract: A liquid crystal display device including a liquid crystal panel including liquid crystal sealed between a pair of substrates; a plurality of gate signal lines and a plurality of drain signal lines formed to cross each other on one of said pair of substrates; a pixel region surrounded by a pair of adjacent gate signal lines and a pair of adjacent drain signal lines; a thin film transistor provided in the pixel region and connected to at least one of the pair of adjacent gate signal lines and at least one of the pair of drain signal lines; a pixel electrode provided in the pixel region and supplied with a video signal via the thin film transistor; and a counter electrode provided in the pixel region and supplied with a reference signal via a counter voltage signal line, the reference signal being a reference for the video signal.
    Type: Grant
    Filed: November 13, 2008
    Date of Patent: July 8, 2014
    Assignee: Panasonic Liquid Crystal Display Co., Ltd.
    Inventors: Takao Takano, Seiichi Kawashima
  • Patent number: 8772074
    Abstract: Provided are an organic light emitting display device and a method for manufacturing the same. The organic light emitting display device comprises a transistor on a substrate, a cathode on the transistor and connected to a source or a drain of the transistor, a bank layer on the cathode and having an opening, a metal buffer layer on the cathode, an organic light emitting layer on the metal buffer layer, and an anode on the organic light emitting layer.
    Type: Grant
    Filed: August 12, 2009
    Date of Patent: July 8, 2014
    Assignee: LG Display Co., Ltd.
    Inventors: Jaehee Park, Heeseok Yang, Howon Choi
  • Patent number: 8766263
    Abstract: In an IPS type liquid crystal display device having a reduced number of layers and formed through a reduced number of photolithography steps, an off current of a TFT is prevented from increasing due to photocurrent. A drain line, a TFT drain electrode, and a source electrode each have a multilayer structure including metal and a semiconductor layer. The drain line and the semiconductor layer formed thereunder are separated from the drain electrode and the semiconductor layer formed thereunder with the drain line and the drain electrode connected by a blocking conductive film formed of ITO of which the pixel electrode is also formed. Photocurrent generated by backlight is blocked by the blocking conductive film without flowing into the TFT. Therefore, the number of photomasks required in the production process can be decreased without an increase of causing the off current of the TFT.
    Type: Grant
    Filed: August 30, 2011
    Date of Patent: July 1, 2014
    Assignees: Japan Display Inc., Panasonic Liquid Crystal Display Co., Ltd.
    Inventor: Takahiro Nagami
  • Patent number: 8766889
    Abstract: A liquid crystal display and a driving method thereof are provided. The liquid crystal display includes a plurality of pixels, a plurality of scan lines, and a plurality of data lines. Each pixel includes a plurality of sub-pixels. Each sub-pixel is coupled to the data line, and includes a switch, a storage capacitor, and a sub-pixel electrode. The switch is coupled to a scan line to receive a scan signal. The switch is turned on by the scan signal to receive a data signal transmitted from the data line. The storage capacitors of the sub-pixels of each pixel are coupled to the scan lines, or the storage capacitor of one of the sub-pixels of each pixel is coupled to a common electrode and the storage capacitors of the other sub-pixels are coupled to the scan lines. The switch and the storage capacitor of each sub-pixel are coupled to different scan lines.
    Type: Grant
    Filed: March 27, 2008
    Date of Patent: July 1, 2014
    Assignee: Au Optronics Corporation
    Inventors: Ming-Sheng Lai, Chih-Wei Wang, Hsueh-Ying Huang, Chen-Kuo Yang
  • Patent number: 8766899
    Abstract: An active liquid crystal display panel includes a pixel array, a gate driving circuit, a data driving circuit, and an analog buffer. The gate driving circuit is used for driving M first scan lines where M is a natural number. The analog buffer is coupled to the gate driving circuit and includes M buffer circuits and a regulator. Each buffer circuit drives a corresponding second scan line according to an output signal of a corresponding first scan line of the M first scan lines, and the regulator is used for maintaining at least one reference voltage supplied to the M buffer circuits.
    Type: Grant
    Filed: April 14, 2011
    Date of Patent: July 1, 2014
    Assignee: AU Optronics Corp.
    Inventors: Wei-Chun Hsu, Yu-Hsin Ting, Chung-Lin Fu, Tsao-Wen Lu, Nan-Ying Lin, Pei-Hua Chen
  • Publication number: 20140176409
    Abstract: Disclosed is an organic light emitting display device and a method of driving the same that can improve compensation performance of degradation of a driving TFT. A method of driving an organic light emitting display device comprises generating an estimated degradation value of a driving TFT by using accumulated data through input data counting; compensating all the pixels of a display panel by using a first gain value, which is initially set, and the estimated degradation value; generating a sensing value by sensing all or some of the pixels of the display panel after driving is performed for a certain time; generating a second gain value by compensating the first gain value if an error between the estimated degradation value and the sensing value is more than a reference value; generating compensation data by compensating the estimated degradation value by using the second gain value; and compensating all the pixels of the display panel by using the compensation data.
    Type: Application
    Filed: October 17, 2013
    Publication date: June 26, 2014
    Applicant: LG Display Co., Ltd.
    Inventors: Tae Gung Kim, Kyeong Kun Jang, Ho Min Lim, Nari Kim, Myung-Gi Lim
  • Publication number: 20140176410
    Abstract: Provided are a gate driving circuit, a display module and a display device belonging to the field of display technique and being designed for solving the problem of high power consumption of the display module in the prior art. The gate driving circuit is used for driving gates of TFTs corresponding to gate lines connected thereto, and includes at least two stages of shift registers connected in cascade, wherein each stage of shift register includes a first output terminal and a second output terminal, the first output terminal is connected to an enable signal input terminal of a next stage of shift register so as to output a next stage enable signal to the next stage of shift register, and the second output terminal is connected to a corresponding gate line so as to apply a gate driving signal on the gates of TFTs through the corresponding gate line.
    Type: Application
    Filed: December 19, 2013
    Publication date: June 26, 2014
    Applicants: HEFEI BOE OPTOELECTRONICS TECHNOLOGY CO., LTD., BOE TECHNOLOGY GROUP CO., LTD.
    Inventors: RUI MA, XIANJIE SHAO, GUOLEI WANG, MING HU
  • Publication number: 20140176494
    Abstract: The invention discloses a touch control display panel and a touch control display apparatus, where the touch control display panel includes a TFT array substrate and a color film substrate arranged in opposition; the TFT array substrate includes a pixel array and a touch control dual-gate TFT array; and when there is a touch control occurring, an electrically conductive post at a press location approaches the touch control dual-gate TFT along with a press, and a channel current of the touch control dual-gate TFT can be modulated by a current generated by the electrically conductive post. There will be no interference with a display per se in operation of the touch control, and no adverse influence imposed on the arrangement of liquid crystals in the liquid crystal display panel. The process of preparing the pixel array can be compatible with that of the touch control dual-gate TFTs, greatly lowering cost.
    Type: Application
    Filed: December 10, 2013
    Publication date: June 26, 2014
    Applicant: Shanghai Tianma Micro-Electronics Co., Ltd.
    Inventor: Zhongshou Huang
  • Publication number: 20140176491
    Abstract: A capacitive touch display panel comprises an array substrate, a color filter substrate and a liquid crystal layer disposed between the array substrate and the color filter substrate; the array substrate includes a base substrate, a polarizer sheet, black matrixes (BMs) and a thin-film transistor (TFT) functional unit and is disposed on a light emitting side of the display panel; the color filter substrate is disposed on a light incident side of the display panel; the TFT functional unit includes gate lines, data lines, and TFTs; the BMs correspond to the TFTs; and projections of gate electrodes, source electrodes and drain electrodes of the TFTs all fall into the BMs in a direction vertical to the base substrate.
    Type: Application
    Filed: November 26, 2013
    Publication date: June 26, 2014
    Applicant: BEIJING BOE OPTOELECTRONICS TECHNOLOGY CO., LTD.
    Inventors: Weijie ZHAO, Xue DONG, Haisheng WANG, Shengji YANG, Yingming LIU, Xiaoliang DING, Hongjuan LIU, Tao REN
  • Patent number: 8760443
    Abstract: A gates-line driving circuit of a display device includes a plurality of stages that are serially connected to each other, where each stage includes a plurality of transistors and a plurality of capacitors and receives a scanning start signal, a plurality of clock signals, and first and second gate-off voltages Voff1 and Voff2 of different magnitudes, where some of the transistors are turned off with the first gate-off voltage, and others of the transistors are turned off with the second gate-off voltage.
    Type: Grant
    Filed: February 16, 2012
    Date of Patent: June 24, 2014
    Assignee: Samsung Display Co., Ltd.
    Inventors: Seob Shin, Yeong-Koo Kim
  • Patent number: 8760376
    Abstract: A liquid crystal display device that displays an image by inputting n (n is a natural number) bit digital signals has n memory circuits in each pixel. The n memory circuits store n bit digital signals, which are converted into corresponding analog signals by a D/A converter provided in each pixel so that the analog signals are inputted to a liquid crystal element. Therefore, when a still image is to be displayed, the stored digital signals are repeatedly used once the digital signals are written in the memory circuits. During the still image is displayed, a source signal line driving circuit and other circuits can stop their driving. Power consumption of the liquid crystal display device thus can be reduced.
    Type: Grant
    Filed: March 19, 2007
    Date of Patent: June 24, 2014
    Assignee: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Jun Koyama, Shunpei Yamazaki
  • Publication number: 20140168045
    Abstract: Embodiments of the invention disclose an array substrate, a liquid crystal display panel and a driving method for increasing aperture ratio of a pixel area, avoiding display horizontal stripes caused by difference in shape between black matrices in adjacent rows and improving display quality.
    Type: Application
    Filed: January 22, 2013
    Publication date: June 19, 2014
    Applicant: BEJING BOE OPTOELECTRONICS TECHNOLOGY CO., LTD.
    Inventors: Wenbo Jiang, Xue Dong, Hailin Xue, Xiaochuan Cheng
  • Publication number: 20140168154
    Abstract: In a capacitive in-cell touch panel and a display device, a common electrode layer electrically connected over the entire surface in a TFT array substrate is partitioned into touch sensing electrodes and touch driving electrodes that are driven in a time-division manner to realize touch function and display function.
    Type: Application
    Filed: December 11, 2013
    Publication date: June 19, 2014
    Applicant: BEIJING BOE OPTOELECTRONICS TECHNOLOGY CO., LTD.
    Inventors: HAISHENG WANG, XUE DONG, YINGMING LIU
  • Publication number: 20140168046
    Abstract: Provided are a driving circuit and a display panel, the driving circuit comprises a voltage dividing module, a comparing module and a switching module, wherein the voltage dividing module has a first terminal connected to a first terminal of the switching module, a second terminal connected to a first terminal of the comparing module, and a third terminal serving as a grounding terminal; a second terminal of the comparing module is connected to a first voltage input terminal, third, fourth and fifth terminals of the comparing module are connected to three control terminals of the switching module respectively; the first terminal of the switching module is connected to a voltage output terminal, a second terminal of the switching module is connected to the first voltage input terminal, and third and fourth terminals of the switching module are connected to second and third voltage input terminal, respectively.
    Type: Application
    Filed: December 13, 2013
    Publication date: June 19, 2014
    Applicants: BEIJING BOE DISPLAY TECHNOLOGY CO., LTD., BOE TECHNOLOGY GROUP CO., LTD.
    Inventor: Jieqiong WANG
  • Patent number: 8754882
    Abstract: Compensate for the variations of threshold voltage of a driving transistor. During the period of the reference signal voltage Vref being set to the signal line DTC, voltage between the gate and source of the driving transistor 10C is made equal to or greater than the threshold voltage of the driving transistor 10C, and the difference in voltage of the reference signal voltage Vref and the reference power supply voltage Vref_r is charged to the retentive capacitance 10B. At the same time, the voltage of the source of the said driving transistor 10C is set to the reference power supply voltage Vref_r to make the voltage applied to the light emitting element 10E equal to or lower than its threshold voltage, a voltage corresponding to the threshold voltage of the driving transistor 10C is held in the retentive capacitance 10B.
    Type: Grant
    Filed: November 4, 2010
    Date of Patent: June 17, 2014
    Assignee: Global OLED Technology LLC
    Inventors: Yuichi Maekawa, Koichi Miwa
  • Patent number: 8754332
    Abstract: Provided is a flexible substrate wherein a connection portion between the flexible substrate and an electric circuit board meets requirements of narrow wiring pitch and low resistance at the connection portion. An electric circuit structure, which has the flexible substrate and the electric circuit board to which the flexible substrate is connected, is also provided. A wiring pattern (22) is formed on a flexible base film (21), a connection terminal (25) connected electrically to an electrode terminal of another electric circuit board is arranged at an end portion of the wiring pattern (22), and the connection terminal (25) includes wide connection terminals (25b, 25c) having a terminal width extending across plural lines of the wiring pattern (22).
    Type: Grant
    Filed: August 3, 2009
    Date of Patent: June 17, 2014
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Yukihiro Sumida, Takeshi Muraoka
  • Publication number: 20140159998
    Abstract: The invention discloses a current detecting circuit, a temperature compensating device and a display device, and relates to the field of display technology, which resolves the problem of image flicker in the display screen or abnormal display due to changes in the turn-on voltage of the thin film transistors in the display panel caused by changes in the temperature in the prior art. The current detecting circuit includes a voltage source, a first mirror current source for supplying a reference current, a second mirror current source for obtaining a difference between a current output from the first mirror current source and a current output from a unit to be detected and converting the difference into a voltage signal, and an inverter for amplifying the voltage signal and output a detection result. A temperature compensating device including the foregoing current detecting circuit. A display device including the above temperature compensating device.
    Type: Application
    Filed: November 21, 2013
    Publication date: June 12, 2014
    Applicants: Hefei BOE Optoelectronics Technology Co., Ltd., BOE Technology Group Co., Ltd.
    Inventors: Shanshan Huang, Min Wang, Chunyang Nie
  • Publication number: 20140160107
    Abstract: A charge sharing apparatus and a charge sharing method applied in a driving circuit of a liquid crystal display are disclosed. The driving circuit includes at least one data latch and at least one output switch. The charge sharing apparatus includes a generating module and an adjusting module. The generating module is coupled to the at least one data latch and used for generating at least one charge sharing level according to at least one data signal inputted to the at least one data latch. The adjusting module is coupled between the generating module and the at least one output switch and used for selectively adjusting level changing state of at least one output signal outputted by the at least one output switch according to the at least one charge sharing level.
    Type: Application
    Filed: December 6, 2013
    Publication date: June 12, 2014
    Applicant: Raydium Semiconductor Corporation
    Inventors: Yu-Lung Lo, Yu-Chun Lin, Chih-Hsien Jen
  • Publication number: 20140160184
    Abstract: Provided is a display driving circuit comprising N gate driving units for being connected to N gate lines on an array substrate respectively, as well as a timing control unit, n pre-charging units and n scanning control units, the N gate driving units, the n pre-charging units and the n scanning control units are all connected to the timing control unit. Further provided is a display driving method, and a display apparatus. According to embodiments of the present disclosure, a time period for liquid crystal molecule being deflected to accurate positions corresponding to desired grayscale will be reduced when a voltage to be charged is supplied on the liquid crystal molecule, thereby accommodating a higher refresh frequency.
    Type: Application
    Filed: November 22, 2013
    Publication date: June 12, 2014
    Applicants: Beijing Boe Display Technology Co., Ltd., Boe Technology Group Co., Ltd.
    Inventor: Zheng WANG
  • Publication number: 20140160102
    Abstract: Embodiments of the present invention disclose an array substrate and a driving method thereof, and a display device. The array substrate comprises: a pixel electrode; a data line; a first thin film transistor comprising a first gate electrode, a first source electrode and a first drain electrode, and a second thin film transistor comprising a second gate electrode, a second source electrode and a second drain electrode; a first gate line connected with the first gate electrode and a second gate line connected with the second gate electrode, wherein the first source electrode and the second source electrode are electrically connected with the data line, and the first drain electrode and the second drain electrode are electrically connected with the pixel electrode.
    Type: Application
    Filed: November 25, 2013
    Publication date: June 12, 2014
    Applicants: Hefei Boe Optoelectronics Technology Co., Ltd., Boe Technology Group Co., Ltd.
    Inventor: SHENG WANG
  • Patent number: 8749724
    Abstract: The present invention discloses an LCD panel. The LCD panel includes a plurality of data lines, a plurality of scan lines insulatingly intersecting the data lines, and a plurality of pixel units defined by the scan lines and corresponding data lines. Any two adjacent pixel units in a same row are respectively coupled to two corresponding scan lines. Any two adjacent pixel units in a same column are respectively coupled to two corresponding data lines. In this present invention, the pixel units coupled to a same data line are respectively coupled to different scan lines so as to reduce the power consumption of the LCD panel.
    Type: Grant
    Filed: August 21, 2011
    Date of Patent: June 10, 2014
    Assignee: Shenzhen China Star Optoelectronics Technology Co., Ltd.
    Inventor: Xiu-feng Zhou
  • Patent number: 8743042
    Abstract: Provided are a display device capable of preventing image noise arising from changes in potential of a common electrode and auxiliary capacitor lines at the time of a switch between a normal mode and a memory mode and a method for driving such a display device. In a case where it is necessary to cause the common electrode and the auxiliary capacitor lines to change in potential along with a switch between the normal mode and the memory mode, the change in potential is made while electrically connecting a node of each memory circuit to a corresponding source line with the corresponding source line having its potential fixed and with the memory circuit having its a switch circuit in a conductive state.
    Type: Grant
    Filed: April 23, 2010
    Date of Patent: June 3, 2014
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Yasushi Sasaki, Yuhichiroh Murakami, Shige Furuta, Seijirou Gyouten, Shuji Nishi