Thin Film Tansistor (tft) Patents (Class 345/92)
  • Patent number: 9082366
    Abstract: A power converting circuit of a display driver includes a positive voltage generator and a negative voltage generator. The positive voltage generator includes a first capacitive DC-DC converter and a first inductive DC-DC converter, and generates a positive source voltage by selectively using one of the first capacitive DC-DC converter, the first inductive DC-DC converter, or a first external power supply voltage. The negative voltage generator includes a second capacitive DC-DC converter and a second inductive DC-DC converter, and generates a negative source voltage by selectively using one of the second capacitive DC-DC converter, the second inductive DC-DC converter, or a second external power supply voltage.
    Type: Grant
    Filed: July 31, 2012
    Date of Patent: July 14, 2015
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Byung-Hun Han, Kyung-Hoon Chung
  • Patent number: 9082331
    Abstract: The present invention provides a liquid crystal display panel and array substrate thereof. The array substrate includes at least a plurality of first scan lines, second scan lines, data lines and a plurality of pixel units arranged in a matrix form; pixel electrodes of pixel unit being divided into at least first sub electrode, second sub electrode and third sub electrode, and controlling first sub electrode and second sub electrode to have a default voltage difference when displaying voltage signal of a same image in 3D display mode. As such, the present invention can reduce signal crosstalk problem in 3D display mode, improve color difference in large view angle condition and reduce color distortion.
    Type: Grant
    Filed: June 18, 2012
    Date of Patent: July 14, 2015
    Assignee: Shenzhen China Star Optoelectronics Technology Co., Ltd.
    Inventor: Zui Wang
  • Patent number: 9082362
    Abstract: A display panel includes a display area, a peripheral area which includes a first peripheral area, and a second peripheral area opposite to the first peripheral area, a plurality of pixels in the display area, a plurality of data lines, a first gate line, a second gate line, a first gate driving circuit and a second gate driving circuit. Each data line corresponds to two pixel columns. The first gate line is at a first side of a pixel row. The second gate line is at a second side of the pixel row. The first gate driving circuit is in the first peripheral area and includes a first stage which provides a gate signal to the first gate line. The second gate driving circuit is in a second peripheral area of the display area and includes a second stage which provides a gate signal to the second gate line.
    Type: Grant
    Filed: September 23, 2011
    Date of Patent: July 14, 2015
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventors: Yu-Han Bae, Jae-Hoon Lee, Seung-Hwan Moon
  • Patent number: 9057919
    Abstract: An LCD panel transmits the display data to sub-pixels in a zigzag pattern through a data line. The variation of the feed-through voltages of the sub-pixels may be modified by adjusting the ratios of the channel widths and the channel lengths of the TFTs in the sub-pixels to some predetermined ratios, or by adjusting the compensation capacitance to the coupling capacitance of the TFTs of the sub-pixels.
    Type: Grant
    Filed: June 26, 2013
    Date of Patent: June 16, 2015
    Assignee: AU Optronics Corp.
    Inventors: Chun-Chi Lai, Ching-Wei Chen, Tsan-Chun Wang, Kuo-Hsing Cheng, Yu-Cheng Chen
  • Patent number: 9057899
    Abstract: An array substrate and a liquid crystal panel are disclosed. Each of the pixel cells of the array substrate includes a voltage compensation circuit. When the scanning signals are inputted to the corresponding first scanning line of a farther pixel cell, the voltage compensation circuit of a current pixel cell operates on the second pixel electrode of the current pixel cell. As such, a ratio of a voltage difference between the second pixel electrode and the common electrode to the voltage difference between the first pixel electrode and the common electrode when the positive polarity is inversed is the same with the ratio when the negative polarity is inversed. In this way, the low color shift effect is enhanced.
    Type: Grant
    Filed: October 24, 2013
    Date of Patent: June 16, 2015
    Assignee: Shenzhen China Star Optoelectronics Technology Co., Ltd
    Inventor: Chengcai Dong
  • Patent number: 9055652
    Abstract: The disclosed technical solution relates to an organic light emitting diode driving circuit, and a display panel, a display and a driving method using the same. The organic light emitting diode driving circuit includes a driving unit, a threshold compensation unit and an organic light emitting diode. The preferred threshold compensation unit comprises 5 transistors and a capacitance. The organic light emitting diode driving circuit compensates the threshold voltage Vth of the driving transistor by means of this 6T1C circuit, eliminates the inconsistent operation states of the organic light emitting diode caused by the different threshold voltages of the driving transistor in the entire circuit, thereby solving the problem regarding the brightness and evenness of the organic light emitting diode.
    Type: Grant
    Filed: October 17, 2012
    Date of Patent: June 9, 2015
    Assignees: BOE TECHNOLOGY GROUP CO., LTD., CHENGDU BOE OPTOELECTRONICS TECHNOLOGY CO., LTD.
    Inventors: Wen Tan, Xiaojing Qi
  • Patent number: 9053673
    Abstract: A system and a method are disclosed for an intra-panel communication interface which, among other advantages, enhances system reliability and reduces bus width. A timing controller initializes communication with a plurality of source drivers by transmitting link data through a plurality of data channels and monitors source driver status through an auxiliary status channel. The plurality of source drivers share the auxiliary status channel to indicate their status. The timing controller transmits display data to a source driver through a data channel. The display data includes a request for status data from the source driver. The source driver transmits the requested status data to the timing controller via the auxiliary status channel.
    Type: Grant
    Filed: March 23, 2011
    Date of Patent: June 9, 2015
    Assignee: Parade Technologies, Ltd.
    Inventors: Zhengyu Yuan, Jian Jin, Ming Qu, Ding Lu, Zhanpeng Zhang, Qing Ouyang
  • Patent number: 9047839
    Abstract: A liquid crystal display device includes an array of pixels each having a memory function, a driving section that supplies a common voltage to a counter electrode of a liquid crystal capacitor, and supplies one of a first voltage and a second voltage to a pixel electrode of the liquid crystal capacitor, the first voltage being the same as the common voltage, the second voltage reversing polarity every predetermined period, and an adjusting section that adjusts an amplitude of at least the second voltage.
    Type: Grant
    Filed: January 14, 2013
    Date of Patent: June 2, 2015
    Assignee: JAPAN DISPLAY INC.
    Inventor: Yasuyuki Teranishi
  • Publication number: 20150145838
    Abstract: A driving circuit includes m×n TFT pixel units, a gate driver, a source driver, m scan lines and 2n data lines. Every row of TFT pixel units is connected to a scan line, and the m scan lines are connected to the gate driver which provides m rows of the TFT pixel units with scan signals through the m scan lines. A first data line and a second data line are set up to every column of the TFT pixel units. Odd-numbered rows of the TFT pixel units are connected to the first data line, and even-numbered rows of the TFT pixel units are connected to the second data line. The first and the second data lines are connected to one source driving chip set up in the source driver through a first switch unit and a second switch unit respectively. The driving circuit can reduce power consumption of the LCD panel, decline of number of source driving chips applied, and reduce production cost.
    Type: Application
    Filed: November 29, 2013
    Publication date: May 28, 2015
    Inventor: Xiangyang Xu
  • Patent number: 9040977
    Abstract: To form stabilized organic light-emitting medium layers using the relief printing method and to provide an organic EL element excellent in terms of pattern-forming accuracy, film thickness uniformity and light-emitting characteristics, a substrate 2, first electrode layers 3 provided on the substrate 2, organic light-emitting medium layers 5 which are provided on the first electrode layers 3 and emit light when electrically connected, and second electrodes 6 which are provided on the organic light-emitting medium layers 5 and make the organic light-emitting medium layers 5 electrically connected when voltage is applied between the first electrodes 3 and the second electrodes are provided. In addition, at least one of the organic light-emitting medium layers 5 is formed of a mixture containing a polymer material having a weight-average molecular weight in a range of 1.5 million to 25 million and at least one low molecular material having a non-repetitive structure.
    Type: Grant
    Filed: September 14, 2012
    Date of Patent: May 26, 2015
    Assignee: Toppan Printing Co., Ltd.
    Inventors: Yasutake Akeno, Takuma Oouchi
  • Patent number: 9041637
    Abstract: A display device includes: a gate line transmitting a gate line; a data line transmitting a data voltage; a first switching element and a second switching element connected to the gate line and the data line; a third switching element connected between the second switching element and a terminal providing a first reference voltage signal; a first liquid crystal capacitor connected to the first switching element; and a second liquid crystal capacitor connected to the second switching element, wherein the third switching element includes a first control terminal connected to the gate line and a second control terminal connected to a terminal providing a second reference voltage signal. The second and third switching elements are operated to form a voltage dividing network having a respective voltage dividing ratio.
    Type: Grant
    Filed: January 7, 2013
    Date of Patent: May 26, 2015
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventor: Sang Jin Jeon
  • Patent number: 9041626
    Abstract: An organic light emitting display and power supply method thereof operate an organic light emitting display panel using a high voltage EVLDD and a low voltage ELVSS supplied from a driver integrated circuit during a low power display mode. The organic light emitting display a first power supply configured to supply a first power including a first high voltage and a first low voltage, a second power supply configured to supply a second power including a second high voltage and a second low voltage, and an organic light emitting display panel configured to receive the first power from the first power supply in a standard display mode and configured to receive the second power from the second power supply in a low power display mode.
    Type: Grant
    Filed: October 22, 2008
    Date of Patent: May 26, 2015
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventors: Sungcheon Park, Wook Lee
  • Patent number: 9041693
    Abstract: A scan driver includes a plurality of stages for receiving a first start signal and a second start signal, a first clock signal and a second clock signal, and at least one of two interrupt signals and outputting a scan signal. Each stage includes an up-signal output unit for receiving the first start signal and for outputting a first output signal that is shifted by one horizontal period from the first start signal, a down-signal output unit for receiving a second start signal and outputting a second output signal shifted by one horizontal period from the second start signal, and a scan signal output unit for receiving the first and second output signals and outputting a high-level or low-level scan signal.
    Type: Grant
    Filed: October 12, 2010
    Date of Patent: May 26, 2015
    Assignee: Samsung Display Co., Ltd.
    Inventor: Kyung-Hoon Chung
  • Patent number: 9041706
    Abstract: In order to suppress an influence of an electrical stress on a TFT characteristic in use of a TFT, a light emitting display apparatus according to the present invention comprises organic EL devices and driving circuits for driving the organic EL devices. The driving circuit includes plural pixels each having a thin film transistor of which a threshold voltage reversibly changes due to the electrical stress applied between a gate terminal and a source terminal, and a voltage applying unit which sets gate potential of the thin film transistor higher than source potential. The voltage applying unit applies the electrical stress between the gate terminal and the source terminal at a time when the thin film transistor is not driven, so as to drive the thin film transistor in a region that the threshold voltage is saturated to the electrical stress.
    Type: Grant
    Filed: January 6, 2014
    Date of Patent: May 26, 2015
    Assignee: Canon Kabushiki Kaisha
    Inventors: Hisae Shimizu, Katsumi Abe, Ryo Hayashi
  • Patent number: 9041300
    Abstract: A driving circuit and method for a pixel unit, the pixel unit and a display apparatus. The driving circuit for the pixel unit includes a switching unit, a storage capacitor (Cst), a first transistor (T1), a second transistor (T2) and a sixth transistor (T6). The switching unit includes a third transistor (T3), a fourth transistor (T4) and a fifth transistor (T5) for controlling a data signal current (Idata) to charge the storage capacitor (Cst). The driving circuit for the pixel unit expedites the speed for charging the storage capacitor (Cst); further, it has an excellent negative feedback function for the leak current of the storage capacitor (Cst), and ensures the stable operation of the circuit.
    Type: Grant
    Filed: November 30, 2012
    Date of Patent: May 26, 2015
    Assignees: BOE TECHNOLOGY GROUP CO., LTD., CHENGDU BOE OPTOELECTRONICS TECHNOLOGY CO., LTD.
    Inventors: Haigang Qing, Xiaojing Qi
  • Publication number: 20150138057
    Abstract: A liquid crystal display device is disclosed. The display device includes gate drive ASG circuits, and a driver integrated circuit configured to connect wires from gate line output terminals of the ASG circuits with a client system. The ASG circuits output level signals to the client system, and the client system is configured to determine a duration time during which the level signals from the ASG circuits exceed a preset level signal threshold value, and in response to the duration time being less than the preset time threshold value, the driver integrated circuit receives an adjusted signal code required for operation of the ASG circuits, and the driver integrated circuit drives the ASG circuits according to the adjusted signal code required for operation of the ASG circuits.
    Type: Application
    Filed: March 19, 2014
    Publication date: May 21, 2015
    Applicants: Tianma Micro-Electronics Co., Ltd., Shanghai AVIC Optoelectronics Co., Ltd.
    Inventors: Song YE, Xupeng Wang, Xiaoyuan Ding, Zhengyuan Huang, Wenjing Li, Xu Yang
  • Publication number: 20150130692
    Abstract: A semi-reflective display and a method for fabricating and assembling a semi-reflective display are presented, where the display may be comprised of visible light rectifying antenna arrays tuned to four different colors, which when forward biased may use electric power to amplify reflected colored light, and when reversed biased may generate electric power by absorbing light. TFT-tunnel diode logic may be used to control each sub-pixel.
    Type: Application
    Filed: November 14, 2013
    Publication date: May 14, 2015
    Inventor: Laurence H. Cooke
  • Patent number: 9030393
    Abstract: A first substrate includes first and second gate lines extending in a first direction, first and second source lines extending in a second direction and a switching element electrically connected with the gate line and the source line. A pixel electrode includes a contact portion contacting with the switching element and extending in the first direction and a main pixel electrode contacting with the contact portion and extending in the second direction. The switching element includes a drain electrode arranged between the source lines. The drain electrode includes a first electrode portion located under the contact portion, a second electrode portion located under the main pixel electrode and connected with the first electrode portion, a third electrode portion connected with the second electrode portion along the first gate line, and a fourth electrode portion connected with the second electrode portion and extending along the second gate line.
    Type: Grant
    Filed: December 5, 2013
    Date of Patent: May 12, 2015
    Assignee: Japan Display Inc.
    Inventors: Masato Kesho, Jin Hirosawa
  • Patent number: 9030452
    Abstract: The described technology relates to a liquid crystal display and a driving method thereof. The liquid crystal display includes a plurality of pixels arranged in a matrix form. The pixels include a liquid crystal capacitor including a pixel electrode and a common electrode as two terminals. A plurality of data lines transfer data to the plurality of pixels. The pixels include a first pixel and a second pixel, which are adjacent to each other. First and second common signals are applied to the common electrode of the first and second pixels, respectively. The second common signal is inverted to the first common signal. The first and second common signals swing between a first voltage and a second voltage. The polarity of the data voltage transferred by a data line with respect to the first common signal or the second common signal is constant during one frame.
    Type: Grant
    Filed: September 10, 2013
    Date of Patent: May 12, 2015
    Assignee: Samsung Display Co., Ltd.
    Inventors: Dae-Gwang Jang, Seok Ha Hong, Joon-Chul Goh, Byung Sun Kim, Sang Mi Kim, Ji Myoung Seo
  • Patent number: 9030388
    Abstract: It discloses a pixel circuit and a driving method thereof. The pixel circuit includes a light-emitting device (OLED), a driving transistor (DTFT), a storage capacitor (Cst), a first switching transistor (T1), a second switching transistor (T2), a compensating transistor (T3) and a fifth switching transistor (T5). The light-emitting device (OLED) has one terminal connected to a power supply (VDD). The driving transistor (DTFT) has a first electrode connected to another terminal of the light-emitting device (OLED), a second electrode connected to a first electrode of the fifth switching transistor (T5), and a gate connected to a first electrode of the first switching transistor (T1). The first switching transistor (T1) has a second electrode connected to a data line, a gate connected to a scan line, and a first electrode connected to the gate of the driving transistor (DTFT).
    Type: Grant
    Filed: December 17, 2012
    Date of Patent: May 12, 2015
    Assignees: Boe Technology Group Co., Ltd., Chengdu Boe Optoelectronics Technology Co., Ltd.
    Inventors: Xiaojing Qi, Quanguo Zhou, Yun Qiu
  • Patent number: 9030396
    Abstract: A liquid display panel driving method to drive a plurality of pixels of a liquid display panel in a frame period comprising a plurality of data input intervals is provided. Each pixel comprises first and second capacitors coupled to a first and second common electrode respectively. The liquid display panel driving method comprises the steps of: keeping the second common electrode at the same voltage level; modifying the voltage of the first common electrode of each pixel along a row of scan line to perform a first pre-charge before the data input interval; turning on the pixels to make each pixel receive the data voltage from the data lines during the data input interval; and turning off the pixels and modifying the voltage of the first common electrode to further set the voltage of each of the pixels to a target level after the data input interval.
    Type: Grant
    Filed: April 1, 2009
    Date of Patent: May 12, 2015
    Assignee: Au Optronics Corporation
    Inventors: Cheng-Chiu Pai, Deniz Yurdasen, Chun-Huai Li, Kung-Yi Chan, Chun-Hung Kuo, Huan-Hsin Li
  • Patent number: 9030395
    Abstract: A thin film transistor array panel includes: a first gate line extending in a first direction; a second gate line extending in the first direction; a data line extending in a different second direction; a first common signal distribution line including a plurality of first branches connected to each other, wherein the first branches extend in the second direction and intersect under or over with the first gate line and the second gate line. The first branches are connected to receive an electrostatic offset voltage of polarity opposite to that of data line voltages supplied on the data line. A column of pixel-electrodes are sandwiched between the data line and one of the first branches.
    Type: Grant
    Filed: June 17, 2010
    Date of Patent: May 12, 2015
    Assignee: Samsung Display Co., Ltd.
    Inventor: Young-Joon Cho
  • Patent number: 9029861
    Abstract: Thin film transistors having a high current drive capability and a suitable threshold voltage are provided. The thin film transistor includes a gate electrode, an insulating layer formed on the gate electrode, a semiconductor layer formed on the insulating layer, and source/drain electrodes formed on the semiconductor layer. The semiconductor layer includes a plurality of regions separated from each other in a longitudinal direction of the source/drain electrodes.
    Type: Grant
    Filed: May 20, 2011
    Date of Patent: May 12, 2015
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Tetsuo Kikuchi, Yoshiharu Kataoka, Shinya Tanaka, Junya Shimada, Chikao Yamasaki
  • Publication number: 20150123886
    Abstract: A gate driving circuit for a display is disclosed. The gate driving circuit utilizes at least one transistor that is connected in series between an input end of a reference voltage signal and a transistor connected to a node providing a high voltage level. Also, a predetermined high voltage is provided to an input terminal located between the at least one transistor and the transistor connecting to the node. For example, the driving voltage of a gate line corresponding to a circuit of current stage is fed into the input terminal. The provided predetermined high voltage can reduce the voltage difference between the source electrode and the drain electrode of the transistor. In such a manner, the gate driving circuit can reduce the occurrence of current leakage in the transistor, thereby improving the stability of driving voltage of the gate driving circuit and the reliability of the gate driving circuit.
    Type: Application
    Filed: March 31, 2012
    Publication date: May 7, 2015
    Applicant: Shenzhen China star Optoelectronics Technology Co.
    Inventor: Shyhfeng Chen
  • Patent number: 9025102
    Abstract: The present invention provides a drive circuit of liquid crystal panel, which includes a gate driver, a source driver, a plurality of gate lines, and a plurality of data lines. The plurality of gate lines and data lines define a plurality of pixel units. Each of the pixel units includes a thin-film transistor, a common electrode, a pixel electrode electrically connected to the thin-film transistor, and a correction capacitor. The thin-film transistor is electrically connected to the gate driver and the source driver respectively by means of the gate lines and the data lines. The common electrode and the pixel electrode constitute a liquid crystal capacitor. The thin-film transistor includes a gate terminal and a drain terminal. The correction capacitor is electrically connected between the gate terminal and the drain terminal for correcting a parasitic capacitor generated between the gate terminal ad the drain terminal due to structural characteristics.
    Type: Grant
    Filed: November 6, 2012
    Date of Patent: May 5, 2015
    Assignee: Shenzhen China Star Optoelectronics Technology Co., Ltd
    Inventors: Yinhung Chen, Xia Tian, Pei Jia
  • Patent number: 9024850
    Abstract: A liquid crystal display is provided. The liquid crystal display includes a pixel array having a plurality of pixels in a matrix on a substrate. First and second pixels are adjacent to each other along a first direction. The first and second pixels each include first and second switching elements. A first common gate line extends in a second direction different from the first direction and is commonly connected to the first and second switching elements. First and second data lines extend in the first direction and are connected to the first and second switching elements, respectively.
    Type: Grant
    Filed: November 24, 2009
    Date of Patent: May 5, 2015
    Assignee: Samsung Display Co., Ltd.
    Inventors: Bong-Jun Lee, Jong-Hwan Lee
  • Patent number: 9024853
    Abstract: The present invention provides a liquid crystal device drive circuit, which includes a gate driver, a source driver, a plurality of gate lines, and a plurality of data lines. The gate lines and data lines define a plurality of pixel units. Each pixel unit includes a thin-film transistor, a common electrode, a pixel electrode electrically connected to the thin-film transistor, a storage capacitor, and a timer switch. The pixel electrode is electrically connected to the thin-film transistor. The common electrode and the pixel electrode constitute a liquid crystal capacitor. The storage capacitor is connected in parallel to the liquid crystal capacitor. The thin-film transistor includes a gate terminal and a source terminal. The gate terminal is electrically connected to the gate line via the timer switch. The thin-film transistor is electrically connected to the gate driver and the source driver respectively by the gate lines and the data lines.
    Type: Grant
    Filed: November 8, 2012
    Date of Patent: May 5, 2015
    Assignee: Shenzhen China Star Optoelectronics Technology Co., Ltd
    Inventors: Gang Yu, Yubo Gu, Pei Jia, Liuyang Yang
  • Publication number: 20150116384
    Abstract: A display device and an optical compensation method for the same are disclosed. In one aspect, the method includes displaying a test image on the display panel, wherein the display panel comprises first, second, and third areas. The method also includes photographing the first and second areas together to generate first photographed data, photographing the second and third areas together to generate second photographed data, and extracting luminance data from each of the first and second photographed data. The method further includes respectively applying different weights to the luminance data of the second area extracted from each of the first and second photographed data to generate compensated luminance data, and generating a compensation parameter for each pixel based at least in part on the compensated luminance data.
    Type: Application
    Filed: April 29, 2014
    Publication date: April 30, 2015
    Applicant: Samsung Display Co., Ltd.
    Inventors: Jeong Kyoo Kim, Kyung Man Kim, In Bok Song, Choong Sun Shin
  • Patent number: 9019187
    Abstract: The present invention relates to a liquid crystal display (LCD) device. More particularly, the present invention relates to an LCD device including a thin film transistor (TFT) compensation circuit in an LCD device which implements a driving circuit by using an oxide TFT, the LCD device capable of compensating for degraded characteristics of a TFT due to threshold voltage shift. As the compensation circuit including a dummy TFT is formed on a non-active area of the LC panel, the degree of threshold voltage shift of the DT due to a DC voltage can be sensed. Based on the sensed result, a threshold voltage of a second TFT can be compensated. This can reduce lowering of a device characteristic.
    Type: Grant
    Filed: December 27, 2012
    Date of Patent: April 28, 2015
    Assignee: LG Display Co., Ltd.
    Inventors: TaeWoong Moon, YounGyoung Chang, ChongHun Park, IlKi Jung
  • Patent number: 9019186
    Abstract: A liquid crystal display device (100) according to the present invention has a plurality of pixels that are arranged in columns and rows to form a matrix pattern and one color display pixel (P) is comprised of four or any other larger even number of pixels. The liquid crystal display device (100) of the present invention includes a plurality of source bus lines (13) which run in a column direction. The even number of pixels that form one color display pixel (P) include larger pixels with a relatively large area and smaller pixels with a relatively small area. Each set of pixels to be supplied with a signal voltage from an associated one of the plurality of source bus lines (13) has substantially the same total area as any other set of pixels. According to the present invention, in a liquid crystal display device in which a plurality of pixels that forms one color display pixel includes the larger and smaller pixels, generation of display unevenness that runs in the column direction can be minimized.
    Type: Grant
    Filed: January 24, 2011
    Date of Patent: April 28, 2015
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Toshinori Sugihara, Toshihide Tsubata, Yuki Yamashita, Fumikazu Shimoshikiryoh, Mitsuaki Hirata, Kenichi Hyohdoh, Ikumi Itsumi, Akane Sugisaka, Masae Kitayama
  • Patent number: 9019179
    Abstract: A pixel circuit of an organic light emitting diode (OLED) is provided. The pixel circuit includes an OLED, a first transistor, a second transistor and a capacitor. The OLED receives a first voltage. A terminal of the first transistor is coupled to the OLED, and another terminal of the first transistor receives a second voltage. A terminal of the second transistor is coupled to the terminal of the first transistor, another terminal of the second transistor is coupled to a control terminal of the first transistor, a control terminal of the second transistor receives a scan signal. The capacitor is coupled between the control terminal of the first transistor and a third voltage. When the scan signal is enabled, the second voltage is set to a data voltage, the third voltage is set to a reference voltage, and the first voltage is set to a low voltage.
    Type: Grant
    Filed: October 13, 2013
    Date of Patent: April 28, 2015
    Assignee: Chunghwa Picture Tubes, Ltd.
    Inventors: Bo-Jhang Sun, Chin-Hai Huang, Szu-Chi Huang
  • Publication number: 20150109274
    Abstract: The present invention provides a liquid-crystal-driving method of driving liquid crystal by causing a potential difference between a pair of electrodes provided for one of upper and lower substrates, wherein a DC image sticking and a flicker are sufficiently reduced, and a liquid crystal display device driven by using the liquid-crystal-driving method. The present invention relates to a method of driving liquid crystal by causing a potential difference between a pair of electrodes provided for one of upper and lower substrates. In the liquid-crystal-driving method, a driving operation of driving liquid crystal by causing a potential between a pair of electrodes is executed. In the driving operation, the absolute value of a second offset voltage is larger than that of a first offset voltage.
    Type: Application
    Filed: April 22, 2013
    Publication date: April 23, 2015
    Inventors: Takatomo Yoshioka, Yuichi Kita, Yoshiki Nakatani
  • Publication number: 20150109273
    Abstract: A polarity of a POL outputted from a polarity inversion control section (9) is always identical between a scanning period and a pause period immediately subsequent to the scanning period, and is reversed every time switching from a pause period to a scanning period is carried out. This makes it possible to both carry out pause driving and prevent image sticking on a display panel.
    Type: Application
    Filed: February 1, 2013
    Publication date: April 23, 2015
    Inventors: Akizumi Fujioka, Kazuki Takahashi, Taketoshi Nakano, Toshihiro Yanagi, Yoshinori Shibata
  • Publication number: 20150109275
    Abstract: The present invention connects the first scan line of the (N+1)th set of scan lines to the second scan line of the first set of scan lines such that the vertical start pulse output signal of the first scan line of the (N+1)th set of scan lines serves as a vertical start pulse input signal of the second scan line of the first set of scan lines, and thereby turning on other second scan lines on the array substrate. The present invention can simplify the layout of the array substrate.
    Type: Application
    Filed: November 18, 2013
    Publication date: April 23, 2015
    Applicant: SHENZHEN CHINA STAR OPTOELECTRONICS TECHNOLOGY CO., LTD.
    Inventors: Chenghung Chen, Jiali Jiang
  • Patent number: 9013377
    Abstract: There is provided an active matrix EL display device that can display a clear multi gray-scale color display to reduce the shift in the potential caused by the potential drop due to the wiring resistance of a power source supply line, in order to decrease the unevenness in a display region. A plurality of drawing out ports of the power source supply line are arranged. Further, in the wiring resistance between the external input terminal and the pixel portion power source supply line, potential compensation is performed by supplying potential to the power source supply line by a feedback amplifier. Further, in addition to above structure, the power source supply line may be arranged in a matrix.
    Type: Grant
    Filed: December 16, 2013
    Date of Patent: April 21, 2015
    Assignee: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Jun Koyama, Hajime Kimura
  • Patent number: 9013387
    Abstract: The present invention discloses a charge-sharing type pixel structure having a first sub-pixel and a second sub-pixel that each includes a transistor. The second sub-pixel further has a third transistor and a top-gate electrode. When the third transistor is switched on, original gray scale applied to a liquid crystal capacitor of the first sub-pixel varies due to charges being shared with other capacitors. The top-gate electrode change the threshold voltage of the third transistor according to biasing signal so as to further adjust the variation of the gray scale voltage applied to the liquid crystal capacitor of the first sub-pixel.
    Type: Grant
    Filed: March 27, 2012
    Date of Patent: April 21, 2015
    Assignee: Shenzhen China Star Optoelectronics Technology Co., Ltd.
    Inventors: Shih-hsun Lo, Minghung Shih
  • Patent number: 9013388
    Abstract: A liquid crystal display device (1) includes a liquid crystal panel having a plurality of pixels disposed in a matrix form, and a patterned retarder having retarder plates (RR) and retarder plates (RL) formed at positions corresponding to odd-numbered rows and even-numbered rows, respectively, of the liquid crystal panel. Among sub pixels disposed in the pixels positioned in the n-th row, a sub pixel electrode of a boundary-proximity sub pixel, which is positioned closest to a boundary between the associated retarder plate (RR) and the associated retarder plate (RL), is connected to an auxiliary bus line via a transistor having a gate electrode connected to a gate bus line in the (n?1)-th or prior row. In the second display mode, gate signals are sequentially supplied to the gate bus lines in order from the first to the N-th rows, and, in the first display mode, gate signals are sequentially supplied to the gate bus lines in order from the N-th to the first rows.
    Type: Grant
    Filed: September 15, 2011
    Date of Patent: April 21, 2015
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Shohei Katsuta, Tsuyoshi Kamada, Seiji Ohhashi
  • Patent number: 9013374
    Abstract: A pixel circuit for an organic light emitting diode display is disclosed. The pixel is configured to provide fast response time and good isolation from data transition coupling.
    Type: Grant
    Filed: August 6, 2010
    Date of Patent: April 21, 2015
    Assignee: Samsung Display Co., Ltd.
    Inventor: Sam-Il Han
  • Publication number: 20150102988
    Abstract: According to one embodiment, a lateral electric-field type of liquid crystal display device includes a display panel and a controller, wherein a frame frequency falls within a range of 1 Hz to 10 Hz, an off-leak current of each of the TFTs has a value of 1×10?15 A or less, a resistivity of a liquid crystal and a resistivity of an alignment film both fall within one of a first range and a second range, the first range being 1×1013 to 5×1013 ?·cm, the second range being 5×1013 to 5×1014 ?·cm, and a relationship of “R1×C1?R2×C2” is satisfied, where R1 is a resistance and C1 is a capacity with respect to each pixel, R2 is a resistance and C2 is a capacity with respect to each pixel.
    Type: Application
    Filed: October 9, 2014
    Publication date: April 16, 2015
    Applicant: Japan Display Inc.
    Inventors: Daiichi SUZUKI, Yukio TANAKA, Kenji NAKAO, Kazuhiro NISHIYAMA, Shinichi KOMURA, Shinichiro OKA, Mika OIWA
  • Patent number: 9007289
    Abstract: A liquid crystal display includes a first gate line; a common voltage line separated from the first gate line; a data line insulated from and crossing the first gate line and the common voltage line; a first switching element connected to the first gate line and the data line; a second switching element connected to the first gate line and the data line; a first liquid crystal capacitor connected to the first switching element; a second liquid crystal capacitor connected to the second switching element; a third switching element connected to the first switching element; an assistance capacitor connected to the third switching element and the common voltage line; and a shielding electrode extending in the same direction as the first gate line and connected to the first switching element.
    Type: Grant
    Filed: April 7, 2011
    Date of Patent: April 14, 2015
    Assignee: Samsung Display Co., Ltd.
    Inventors: Seong-Young Lee, Ji-Sun Kim, Sung-Hoon Kim, Si Hyun Ahn, Chang hoon Baek, Chong-Chul Chai
  • Patent number: 9001101
    Abstract: A liquid crystal display device includes: a plurality of gate and data lines crossing each other on a substrate to define a plurality of pixels; a thin film transistor in each pixel region and connected to the corresponding gate and data lines; a pixel electrode in each pixel region and connected to a drain electrode of the thin film transistor; and an opposing electrode that forms a capacitor in each pixel along with the pixel electrode, wherein the pixel electrode of a pixel at a nth row line and a mth column line is connected to the opposing electrode of a neighboring pixel along the mth column line or along the nth row line.
    Type: Grant
    Filed: December 28, 2011
    Date of Patent: April 7, 2015
    Assignee: LG Display Co., Ltd.
    Inventors: Kwang-Pyo Hong, Jong-Hyun Lee
  • Patent number: 9001014
    Abstract: An embodiment of the present invention provides a display including: a first substrate; gate lines and data lines defining a first color, second color, and third color pixel area; a first color, second color, and third color pixel transistor located in the first color, second color, and third color pixel area respectively; a second substrate; and a black matrix, wherein the black matrix has a first portion and a second portion, and the first portion extends from an edge of a first color pixel active layer for a first shading distance, the second portion extends from an edge of a third pixel active layer for a second shading distance larger than the first shading distance.
    Type: Grant
    Filed: June 26, 2013
    Date of Patent: April 7, 2015
    Assignee: InnoLux Corporation
    Inventors: Chia-Hao Tsai, Chih-Lung Lin
  • Patent number: 9001075
    Abstract: A display device having a touch panel function includes a plurality of pixel circuits arranged in a matrix shape and sensing circuits arranged in a region between the adjacent pixel circuits for reading out a magnitude of coupling capacitance. A display driver writes a display signal in the pixel circuit every row line by driving the scanning lines and signal lines in a display operation period. A sensing driver senses a signal showing magnitude of the coupling capacitance from the sensing circuit every row line by driving the plurality of scanning lines and signal lines in a sensing operation period. The display operation period and the sensing operation period are repeated in turns. A voltage in a range used for the displaying operation is written into the signal line in a preliminary writing operation period between after the sensing operation period and before the display operation period.
    Type: Grant
    Filed: October 15, 2012
    Date of Patent: April 7, 2015
    Assignee: Japan Display Inc.
    Inventors: Takayuki Imai, Hideyuki Takahashi, Hirofumi Kato, Jun Hanari, Atsunori Ooyama
  • Publication number: 20150091949
    Abstract: A display device may include a display panel that includes a first region and a second region. The display device may include a controller that may receive a first gamma value and a second gamma value, use the first gamma value or a third gamma value to generate first image data, use the first gamma value and the second gamma value to generate a fourth gamma value, and use the fourth gamma value to generate second image data. The display device may include a data driver that may use the first image data and the second image data to generate a first data voltage set and a second data voltage set. The first region may use the first data voltage set to display a first portion of an image. The second region may use the second data voltage set to display a second portion of the image.
    Type: Application
    Filed: March 19, 2014
    Publication date: April 2, 2015
    Applicant: Samsung Display Co., Ltd.
    Inventors: Ho In KIM, Kyung Won KANG, Young-Sun KWAK, Sang An KWON, Hyeon-Do PARK, Won Jin SEO, Myung Bo SIM, Yoon Seop SHIM
  • Patent number: 8994635
    Abstract: The invention provides an image display device capable of reducing the transmission delay of a scanning signal. A plurality of scanning signal lines are wired in one pixel circuit row. Pixel circuits of the pixel circuit row are connected to any of the plurality of scanning signal lines.
    Type: Grant
    Filed: June 5, 2009
    Date of Patent: March 31, 2015
    Assignees: Japan Display Inc., Panasonic Liquid Crystal Display Co., Ltd.
    Inventors: Kenta Kajiyama, Takeshi Izumida, Norihiro Nakamura, Naoki Tokuda
  • Patent number: 8994627
    Abstract: A liquid crystal display includes data lines extending in a first direction, gate lines extending in a second direction between a first side and a second side of the liquid crystal display and crossing the data lines, and common voltage lines crossing the data lines and parallel with the gate lines. The gate lines include even gate lines coupled to a gate driver at near the first side and odd gate lines coupled to the gate driver at near the second side. The common voltage lines include even common voltage lines coupled to a common voltage supplier at near the second side and odd common voltage lines coupled to the common voltage supplier at near the first side.
    Type: Grant
    Filed: March 14, 2008
    Date of Patent: March 31, 2015
    Assignee: Samsung Display Co., Ltd.
    Inventors: Minwoo Kim, Minhyung Kim
  • Patent number: 8982024
    Abstract: A liquid crystal display device includes: a first substrate, on which a reference potential trunk line that supplies a reference potential to a plurality of sub-pixels and a switching element of each of the plurality of sub-pixels, are disposed; and a second substrate, on which a display signal line that supplies a display signal, is disposed. A liquid crystal capacitance of each of the plurality of sub-pixels is formed between the first substrate and the second substrate. Pixels composed of the plurality of sub-pixels that correspond to a plurality of luminance regions are arranged in a matrix. In case that a prescribed half-tone is displayed in between pixels that are adjacent in the row direction, the plurality of sub-pixels that correspond to the same luminance region are arranged adjacently in the row direction.
    Type: Grant
    Filed: March 25, 2011
    Date of Patent: March 17, 2015
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Tsuyoshi Kamada, Tetsuya Ide, Seiji Ohhashi, Shohei Katsuta
  • Patent number: 8982026
    Abstract: A sub-pixel circuit, display panel and driving method of the display panel are provided. The display panel has a plurality of data lines, scan lines and sub-pixel circuits. At least one of the sub-pixel circuits is electrically coupled to one data line and three scan lines. The sub-pixel circuit determines whether to receive data from the coupled data line or not according to scan signals transmitted on the coupled three scan lines, and controls transmittance itself accordingly. Specifically, the scan signals transmitted on the coupled three scan lines are different from each other.
    Type: Grant
    Filed: June 21, 2012
    Date of Patent: March 17, 2015
    Assignee: AU Optronics Corp.
    Inventors: Yu-Ching Wu, Tien-Lun Ting, Kun-Cheng Tien, Chien-Huang Liao, Wen-Hao Hsu
  • Patent number: 8982113
    Abstract: The present invention discloses an LCD panel, which includes a gate driver, a source driver, a plurality of gate lines and data lines. The gate lines and the data lines define a plurality of pixel units, and each pixel unit includes a TFT, a common electrode, and a pixel electrode. The data line is utilized to charge the pixel electrode. The LCD panel further includes a common electrode line, the common electrode line coupled to the common electrode. The common electrode line is utilized to provide alternating common electrode voltages to the common electrode, so that a voltage of the pixel electrode still approaches a target voltage by which the data line charges the pixel electrode when a gate voltage of the TFT is turned off. The present invention also provides a method for controlling voltages of the LCD panel.
    Type: Grant
    Filed: September 15, 2011
    Date of Patent: March 17, 2015
    Assignee: Shenzhen China Star Optoelectronics Technology Co., Ltd.
    Inventor: Chih-Tsung Kang
  • Publication number: 20150070258
    Abstract: A scan line to which a selection signal or a non-selection signal is input from its end, and a transistor in which a clock signal is input to a gate, the non-selection signal is input to a source, and a drain is connected to the scan line are provided. A signal input to the end of the scan line is switched from the selection signal to the non-selection signal at the same or substantially the same time as the transistor is turned on. The non-selection signal is input not only from one end but also from both ends of the scan line. This makes it possible to inhibit the potentials of portions in the scan line from being changed at different times.
    Type: Application
    Filed: September 2, 2014
    Publication date: March 12, 2015
    Inventor: Hiroyuki MIYAKE