Thin Film Tansistor (tft) Patents (Class 345/92)
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Patent number: 8884846Abstract: A transparent drying material is applied on an inner side of a translucent glass substrate, which is arranged to face a sealing glass substrate whereupon an organic light emitting element is formed, and the sealing glass substrate and the translucent glass substrate are sealed. A polarizing film is arranged on an outer side of the transparent glass substrate. Luminance nonuniformity on a screen is eliminated by permitting an angle formed by a normal line on the surface unevenness of the transparent drying material and a normal line of the translucent glass substrate to be 53 degrees or less.Type: GrantFiled: February 22, 2008Date of Patent: November 11, 2014Assignees: Japan Display Inc., Panasonic Liquid Crystal Display Co., Ltd.Inventors: Masahiro Tanaka, Jun Tanaka, Nobuhiko Fukuoka, Hitoshi Azuma
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Patent number: 8884861Abstract: Embodiments of the present invention relate to a liquid crystal display and a driving method thereof. According to an embodiment, the liquid crystal display comprises a pixel electrode having a first subpixel electrode, a second subpixel electrode, and a third subpixel electrode electrically separated from each other. The liquid crystal display comprises a first thin film transistor connected to the first subpixel electrode, a second thin film transistor connected to the second subpixel electrode, a third thin film transistor connected to the third subpixel electrode, and a fourth thin film transistor connected to the second subpixel electrode and the third subpixel electrode. The liquid crystal display comprises a first gate line connected to the first to third thin film transistors, a second gate line connected to the fourth thin film transistor, a data line connected to the first and second thin film transistors, and a storage electrode line connected to the third thin film transistor.Type: GrantFiled: April 9, 2009Date of Patent: November 11, 2014Assignee: Samsung Display Co., Ltd.Inventors: Young-Wook Lee, Hwa-Yeul Oh, Pil-Sang Yun, Je-Hyeong Park
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Patent number: 8884847Abstract: A display apparatus disclosed herein includes a plurality of pixel circuits, each having a plurality of switches configured to receive a driving signal of a predetermined period and to be controlled for opening and closing operation by the driving signal, a drive circuit configured to control the open/closed state of the switches, being operable to scan the pixel circuits and open and close the switches in periods independent of each other.Type: GrantFiled: March 24, 2008Date of Patent: November 11, 2014Assignee: Sony CorporationInventors: Mitsuru Asano, Takao Tanikame
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Patent number: 8878827Abstract: An organic light emitting diode (OLED) display includes: a switching thin film transistor including a switching gate electrode, a switching active layer, a switching source electrode, and a switching drain electrode; a driving thin film transistor including a driving gate electrode, a driving active layer, a driving source electrode, and a driving drain electrode; a capacitor including a first capacitor electrode and a second capacitor electrode; a scan line that is connected to the switching gate electrode of the switching thin film transistor; a data line that intersects the scan line and that is connected to the switching source electrode of the switching thin film transistor; a first power source line that is parallel to the data line and that is connected to the driving source electrode of the driving thin film transistor; a second power source line that is separated parallel to the data line and that is connected to the second capacitor electrode of the capacitor; and an organic light emitting diode thaType: GrantFiled: May 26, 2011Date of Patent: November 4, 2014Assignee: Samsung Display Co., Ltd.Inventors: Sam-Il Han, Ji-Hyun Ka
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Patent number: 8879010Abstract: A display panel for displaying an image is provided with a plurality of pixels arranged in a matrix. Each pixel includes one or more units each including a plurality of subunits. Each subunit includes a transistor in which an oxide semiconductor layer which is provided so as to overlap a gate electrode with a gate insulating layer interposed therebetween, a pixel electrode which drives liquid crystal connected to a source or a drain of the transistor, a counter electrode which is provided so as to face the pixel electrode, and a liquid crystal layer provided between the pixel electrode and the counter electrode. In the display panel, a transistor whose off current is lower than 10 zA/?m at room temperature per micrometer of the channel width and off current of the transistor at 85° C. can be lower than 100 zA/?m per micrometer in the channel width.Type: GrantFiled: January 21, 2011Date of Patent: November 4, 2014Assignee: Semiconductor Energy Laboratory Co., Ltd.Inventor: Shunpei Yamazaki
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Patent number: 8878761Abstract: An object of the present invention is to provide a liquid crystal display device capable of improving a viewing angle, while not decreasing an aperture ratio and preventing an increase in electricity consumption. A liquid crystal display device (1) of the present invention includes an active matrix substrate including a plurality of drain electrodes (14) disposed in a matrix form, a counter substrate including a plurality of common electrodes, and a liquid crystal layer being sandwiched between the active matrix substrate and the counter substrate, each of the plurality of drain electrodes (14) having formed (i) a subpixel (16a) part facing a first common electrode (11) among the plurality of common electrodes, across the liquid crystal layer, and (ii) a subpixel (16b) part facing a second common electrode (12) among the plurality of common electrodes, across the liquid crystal layer.Type: GrantFiled: June 28, 2010Date of Patent: November 4, 2014Assignee: Sharp Kabushiki KaishaInventors: Jun Nakata, Ken Inada
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Patent number: 8878758Abstract: A bidirectional switch includes a pair of transistors, with each transistor including a source connected via a degeneration resistance to a common source control node, a gate connected to a common gate control node, a drain connected to a respective channel or gate line and to a charge storage node, respectively, and a clamp diode connected between the source and the gate. This forms a single charge transfer path between gate lines sequentially activated by a scan driver of an LCD panel, and implements a charge sharing technique for reducing power dissipation.Type: GrantFiled: July 27, 2012Date of Patent: November 4, 2014Assignee: STMicroelectronics S.r.l.Inventors: Domenico Cristaudo, Stefano Corradi, Stefano Sueri
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Patent number: 8878751Abstract: An organic light emitting display includes: pixels located at crossing regions between scan lines and data lines; a first control line and a second control line commonly coupled to the pixels; a control line driver configured to supply a first control signal to the first control line for a reset period and to supply a second control signal to the second control line during the reset period and a compensation period. Each pixel includes: an organic light emitting diode; a first transistor configured to control an amount of current supplied from a first power source coupled to a first electrode to a second power source via the organic light emitting diode; a second transistor configured to be turned on when the second control signal is supplied; and a fourth transistor configured to supply an initial voltage to a second electrode of the first transistor when the first control signal is supplied.Type: GrantFiled: June 6, 2011Date of Patent: November 4, 2014Assignee: Samsung Display Co., Ltd.Inventors: Bo-Yong Chung, Yong-Sung Park
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Publication number: 20140320473Abstract: The present disclosure provides a frame scanning pixel display driving unit and a driving method thereof, and a display apparatus. The frame scanning pixel display driving unit include a driving transistor for driving a pixel to display, a data writing module and a driving control module, wherein: the driving control module is configured to: receive a first frame data signal, and control the driving transistor to drive the pixel to display based on the first frame data signal; the data writing module is configured to: receive and latch the second frame data signal when the driving transistor drives the pixel to display based on the first frame data signal, and transmit the second frame data signal to the driving control module after the displaying of the first frame data signal is completed; wherein the second frame data signal is a data signal for a frame next to the first frame.Type: ApplicationFiled: August 14, 2013Publication date: October 30, 2014Inventor: Zhanjie Ma
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Publication number: 20140313114Abstract: A column driver of a display device provides a high slew rate with lowered power requirements by using external switches connected to upper and bottom output buffers. The upper output buffer is driven between a first voltage rail and a second voltage rail, and outputs a first output signal in response to a first input signal and a second input signal. The bottom output buffer is driven between the second voltage rail and a third voltage rail, and outputs a second output signal in response to a third input signal and a fourth input signal. A first switch group selectively provides input for the upper output buffer and the bottom output buffer. A second switch group feeds back the first and the second output signals to the first or the second input terminal of each of the upper output buffer and the bottom output buffer.Type: ApplicationFiled: March 5, 2014Publication date: October 23, 2014Applicant: MAGNACHIP SEMICONDUCTOR, LTD.Inventors: Chang Ho AHN, Byung Jae NAM, Sang Hyun PARK, Jae Hong KO, Hyun Jin SHIN
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Patent number: 8866714Abstract: A source-drain voltage of one of two transistors connected in series becomes quite small in a set operation (write signal), thus the set operation is performed to the other transistor. In an output operation, two transistors operate as a multi-gate transistor, therefore, a current value can be small in the output operation. In other words, a current can be large in the set operation. Therefore, the set operation can be performed rapidly without being easily influenced by an intersection capacitance and a wiring resistance which are parasitic on a wiring and the like. Further, an influence of variations between adjacent ones can be small as one same transistor is used in the set operation and the output operation.Type: GrantFiled: April 25, 2011Date of Patent: October 21, 2014Assignee: Semiconductor Energy Laboratory Co., Ltd.Inventor: Hajime Kimura
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Patent number: 8866804Abstract: A first transistor comprises a gate coupled to a first scan line, a source coupled to a data line, and a drain coupled to the first storage capacitor. The second transistor comprises a gate coupled to a second scan line, a source coupled to the first storage capacitor, and a drain coupled to the second storage capacitor. A first polarity voltage applied on the data line is stored into the first storage capacitor during a first time period which the first transistor is turned on. The first storage capacitor discharges due to a connection between the first capacitor and the second capacitor during a second time period which the second transistor is turned on. By using such driving method, the difference in voltage between the liquid crystal capacitor and a common voltage is reduced from charge sharing for improving a color washout effect of the LCD panel.Type: GrantFiled: June 1, 2011Date of Patent: October 21, 2014Assignee: Shenzhen China Star Optoelectronics Technology, Co. Ltd.Inventor: Chenghung Chen
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Patent number: 8866715Abstract: Each pixel includes two pixel electrodes connected to each other via a capacitor, and in respect to a pixel (101) that belongs to the column of pixels and to the row of pixels, a transistor (12a) connected to one of the two scanning signal lines (16a, 16b) is electrically connected to one of two pixel electrodes (17a, 17b) included in the pixel (101), a transistor (12b) connected to the other one of the two scanning signal lines is electrically connected to the other one of the two pixel electrodes, and each of these transistors (12a, 12b) is electrically connected to an identical data signal line (15x) that is one of the two data signal lines (15x, 15y).Type: GrantFiled: April 15, 2010Date of Patent: October 21, 2014Assignee: Sharp Kabushiki KaishaInventor: Toshihide Tsubata
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Patent number: 8866808Abstract: A method for driving a display panel is provided. The method includes the following steps. Firstly, providing a first scan signal to turn on a plurality of first sub-pixels within the ith pixel row of the display panel during a Nth frame period, so as to make the first sub-pixels respectively receive a corresponding first data signal. Next, providing a second scan signal to turn on a plurality of second sub-pixels within the ith pixel row of the display panel during the Nth frame period, so as to make the second sub-pixels respectively receive a corresponding second data signal. The amplitude of the first scan signal is different from the amplitude of the second scan signal, and N and i are positive integers.Type: GrantFiled: January 21, 2009Date of Patent: October 21, 2014Assignee: Au Optronics CorporationInventors: Chung-Lung Li, Yun-Chung Lin, Fang-Lin Chang
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Patent number: 8866802Abstract: A display device which realizes a multi-gradation constant display with low power consumption is provided.Type: GrantFiled: November 19, 2010Date of Patent: October 21, 2014Assignee: Sharp Kabushiki KaishaInventor: Yoshimitsu Yamauchi
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Patent number: 8866713Abstract: A liquid crystal display (LCD) device capable of reducing the driving power and preventing cross talk is provided. The LCD device comprises: a plurality of data lines arranged on a substrate in a vertical direction for transmitting image data; a plurality of gate lines arranged on the substrate in a horizontal direction for transmitting a scan signal; a plurality of pixels formed at each intersection between the gate lines and the data lines and arranged on the substrate in a matrix formation; a first electrode and a second electrode respectively provided at each pixel for forming a horizontal electric field; and a plurality of first common voltage lines and second common voltage lines alternately arranged on the substrate in a horizontal direction, wherein the second electrodes provided at each pixel of a line unit are alternately connected to the first common voltage line and the second common voltage line.Type: GrantFiled: June 9, 2005Date of Patent: October 21, 2014Assignee: LG Display Co., Ltd.Inventors: Dong-Hoon Lee, Ho-Jin Ryu
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Patent number: 8866719Abstract: A transistor (N1) has a gate terminal connected to a word line (Xi(1)) and a first conduction terminal connected to a bit line (Yj). A transistor (N2) has a gate terminal connected to the word line (Xi(2)) and a first conduction terminal connected to a node (PIX). A transistor (N3) has a gate terminal connected to a node (MRY) and a first conduction terminal connected to the word line (Xi(2)). A transistor (N4) has a gate terminal connected to the word line (Xi(3)), a first conduction terminal connected to a second conduction terminal of the transistor (N3), and a second conduction terminal connected to the node (PIX). Capacitors (Ca1), (Cb1), (Cap1) are formed between the node (PIX) and a reference electric potential wire (RL1), between the node (MRY) and the reference electric potential wire (RL1), and between the first conduction terminal of the transistor (N3) and the node (MRY), respectively.Type: GrantFiled: May 18, 2010Date of Patent: October 21, 2014Assignee: Sharp Kabushiki KaishaInventors: Shuji Nishi, Yuhichiroh Murakami, Shige Furuta, Yasushi Sasaki, Seijirou Gyouten
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Publication number: 20140305897Abstract: A bottle includes a transparent flexible display, and a body, the body being configured to contain a liquid, the body including a display unit that selectively shows the liquid in the body and displays content, and that is deformable by an external force, and a controller that controls the content to be displayed on the display unit.Type: ApplicationFiled: October 1, 2013Publication date: October 16, 2014Applicant: SAMSUNG DISPLAY CO., LTD.Inventors: Ye-Sol LEE, Su-Yeon YUN
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Patent number: 8860643Abstract: A display device includes an image signal modifier for modifying input image signals based on the difference between the input image signal for a pixel in a first row and the input image signal for the pixel in the adjacent row. The gate-on voltages includes a pre-charging voltage and a main charging voltage, the main charging voltage for the first row overlaps the pre-charging voltage for the second row and the pre-charging voltage for the first grow overlaps the main charging voltage for the second row for a predetermined time. The first data voltage is applied to the pixels of the first and second rows after application of the main charging gate-on voltage for the first row and the pre-charging gate-on voltage for the row, and the second data voltage is applied to the pixel of the second row after application of the main charging gate-on voltage for the second row.Type: GrantFiled: August 29, 2006Date of Patent: October 14, 2014Assignee: Samsung Display Co., Ltd.Inventor: Baek-Woon Lee
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Patent number: 8854296Abstract: Disclosed herein is an apparatus. The apparatus includes a housing, electronic circuitry, and an electronic component. The electronic circuitry is in the housing. The electronic circuitry includes a first capacitive connection pad. The electronic component is removably attached to an outer surface of the housing. The electronic component includes a second capacitive connection pad located opposite the first capacitive connection pad to form a capacitive connection between the electronic circuitry and the electronic component.Type: GrantFiled: August 1, 2008Date of Patent: October 7, 2014Assignee: Nokia CorporationInventor: Ilkka Antero Hyytiainen
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Patent number: 8854286Abstract: In a liquid crystal display device including a plurality of pixels in a display portion and configured to performed display in a plurality of frame periods, each of the frame periods includes a writing period and a holding period, and after an image signal is input to each of the plurality of pixels in the writing period, a transistor included in each of the plurality of pixels is turned off and the image signal is held for at least 30 seconds in the holding period. The pixel includes a semiconductor layer including an oxide semiconductor layer, and the oxide semiconductor layer has a carrier concentration of less than 1×1014/cm3.Type: GrantFiled: October 8, 2010Date of Patent: October 7, 2014Assignee: Semiconductor Energy Laboratory Co., Ltd.Inventors: Shunpei Yamazaki, Ryo Arasawa, Jun Koyama, Masashi Tsubuku, Kosei Noda
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Patent number: 8854287Abstract: A vertical alignment liquid crystal display includes two sub-pixels each with a variable capacitor. A pixel is bisected into a high gray sub-pixel and a low gray sub-pixel through forming a variable capacitor at each sub-pixel. With this structure, the sub-pixels express different grays so that lateral visibility is enhanced. It is not required in bisecting a pixel into two sub-pixels to form separate wires for applying different signals thereto, and the amount of data to be processed at the driver for driving the display device is reduced. Furthermore, a pixel is bisected into two sub-pixels with variable capacitors in a simplified manner, and it is not required to form additional wires and elements, so the aperture ratio is enhanced.Type: GrantFiled: December 14, 2012Date of Patent: October 7, 2014Assignee: Samsung Display Co., Ltd.Inventors: Joon-Chul Goh, Kwang-Chul Jung, Chong-Chul Chai, Mee-Hye Jung, Young-Soo Yoon
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Patent number: 8847931Abstract: A driving apparatus of a liquid crystal display includes a signal modification unit which modifies a signal based on a data signal input to the liquid crystal display, where the signal modification unit determines whether the data signal corresponds to an image to be displayed with a quality deterioration and outputs at least one of a first signal and a second signal, where the first signal is output when the signal modification unit determines the data signal corresponds to the image to be displayed with the quality deterioration, and where the second signal is output when the signal modification unit determines the data signal does not corresponds to the image to be displayed with the quality deterioration.Type: GrantFiled: September 23, 2011Date of Patent: September 30, 2014Assignee: Samsung Display Co., Ltd.Inventors: Jae-Won Jeong, Hoi Sik Moon, Woo-Jin Jung, Woo-Young Lee, Kang-Hyun Kim, Duc-Han Cho, Su-Bin Park
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Patent number: 8842062Abstract: A pixel driving circuit is electrically coupled between a first data line and a second data line and between a first scan line and a second scan line, and includes a first switch, a second switch, a third switch, a fourth switch, a liquid crystal capacitor electrically connected between the first switch and the second switch, a first capacitor electrically connected to the first switch, a second capacitor electrically connected to the second switch, a first storage capacitor, a second storage capacitor and at least one switching unit. The first storage capacitor is electrically connected to the third switch and supplied by a reference voltage. The second storage capacitor is electrically connected to the fourth switch and supplied by the reference voltage. The at least one switching unit is used for redistributing charges in the pixel driving circuit.Type: GrantFiled: March 18, 2013Date of Patent: September 23, 2014Assignee: AU Optronics CorporationInventors: Mei-Ju Lu, Sau-Wen Tsao, Yen-Ying Kung, Cho-Yan Chen, Tien-Lun Ting
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Patent number: 8842061Abstract: The present invention discloses a shifting register and an apparatus for driving gate lines, and it relates to Liquid Crystal Display technical field, for reducing the noise of a shifting register during non-working period. The shifting register comprises: a first thin film transistor, a second thin film transistor, a third thin film transistor, a fourth thin film transistor, a capacitor and a pull-down module, and the pull-down module is connected among a clock signal port, a first node and a signal output terminal, and further is connected to a low level signal terminal, for maintaining the first node and the signal output terminal to be at low level during the non-working period of the shifting register. The apparatus for driving gate lines comprises a plurality of above shifting registers connected in serial. The present invention is applicable to driving gate lines.Type: GrantFiled: April 4, 2012Date of Patent: September 23, 2014Assignee: Beijing Boe Optoelectronics Technology Co., Ltd.Inventors: Xi Chen, Wenhai Cui
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Patent number: 8842112Abstract: An image display device equalizes an amount of shift in Vth of a driving element for each pixel. Provided are a light-emitting element (D1) that emits light corresponding to current flowing therethrough; a driving element (Q1) that is connected to the light-emitting element (D1) and controls light emission of the light-emitting element (D1); and a controller (U1) that detects a threshold voltage of the driving element (D1) and controls an applied voltage to the driving element (D1) based on the detected threshold voltage. The controller (U1) applies voltages for a reverse or forward bias to the driving element (D1) based on a comparison result between the threshold voltage and a predetermined threshold when the light-emitting element (D1) does not emit light.Type: GrantFiled: March 28, 2008Date of Patent: September 23, 2014Assignee: LG Display Co., Ltd.Inventors: Shinji Takasugi, Taro Hasumi
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Patent number: 8842060Abstract: A display device includes: a pixel array unit with pixel circuits disposed in matrix form, the pixel circuit including a driving transistor, an electro-optic element, a storage-capacitor, and a sampling transistor, with the electro-optic element emitting light by generating a driving current based on information stored in the storage-capacitor at the driving transistor to be applied to the electro-optic element; and a control unit, of which the output stage includes a buffer transistor, to output a pulse signal for driving the pixel array unit from the buffer transistor; wherein the pixel array unit and the control unit are formed with long laser beam irradiation to be scanned in the vertical direction; and with the control unit, buffer transistors for outputting a pulse signal for sampling to an input video signal to each signal line are arrayed in a column in the longitudinal direction of the laser beam irradiation.Type: GrantFiled: July 31, 2013Date of Patent: September 23, 2014Assignee: Sony CorporationInventors: Junichi Yamashita, Katsuhide Uchino
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Patent number: 8836629Abstract: An image display apparatus includes a display section having a pixel unit included in a layout of a pixel matrix and provided with a memory unit used for storing a logic level of input image data; a vertical driving section for asserting a scan signal on a scan line provided for the display section; and a horizontal driving section for asserting a driving signal according to the input image data on a signal line provided for the display section.Type: GrantFiled: March 15, 2008Date of Patent: September 16, 2014Assignee: Japan Display, Inc.Inventors: Yasuyuki Teranishi, Yoshiharu Nakajima, Naoyuki Itakura, Takayuki Nakanishi, Yoshitoshi Kida
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Patent number: 8836677Abstract: An array substrate and driving method thereof are described. The array substrate includes a gate driver, a source driver, a plurality of pixel regions and a switch unit. The pixel regions are composed of an array configuration in form of rows and columns wherein each of the pixel regions is connected to a secondary data line and two scan lines. The switch unit is coupled to the source driver via a plurality of primary data lines and coupled to the pixel regions via the secondary data lines wherein one of the primary data lines corresponds to one secondary data line in one pixel region and to another secondary data line in another pixel region adjacent to the one pixel region by the switch unit.Type: GrantFiled: November 23, 2011Date of Patent: September 16, 2014Assignee: Shenzhen China Star Optoelectronics Technology Co., Ltd.Inventors: Meng Li, Jin-jie Wang
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Patent number: 8836626Abstract: An image sensor is provided which is capable of holding data for one frame period or longer and conducting a difference operation with a small number of elements. A photosensor is provided in each of a plurality of pixels arranged in a matrix, each pixel accumulates electric charge in a data holding portion for one frame period or longer, and an output of the photosensor changes in accordance with the electric charge accumulated in the data holding portion. As a writing switch element for the data holding portion, a transistor with small leakage current (sufficiently smaller than 1×10?14 A) is used. As an example of the transistor with small leakage current, there is a transistor having a channel formed in an oxide semiconductor layer.Type: GrantFiled: June 28, 2012Date of Patent: September 16, 2014Assignee: Semiconductor Energy Laboratory Co., Ltd.Inventor: Takayuki Ikeda
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Patent number: 8830153Abstract: A display panel and a method for repairing signal lines thereof are disclosed. The display panel includes at least one shorting bar, switches, and auxiliary repair lines. The switches are electrically coupled respectively to signal lines and the at least one shorting bar. Both ends of each of the auxiliary repair lines overlap one of connections between the switches and the at least one shorting bar. When a signal line is damaged, the method for repairing includes: breaking off each of the connections between the switches and the at least one shorting bar by cutting; and welding both ends of one of the auxiliary repair lines which correspond to the damaged signal line with both sides of one of the connections which correspond to the damaged signal line.Type: GrantFiled: December 31, 2010Date of Patent: September 9, 2014Assignee: Chunghwa Picture Tubes, Ltd.Inventors: Jun-yao Huang, Yin-hsiang Teng, Ren-tsai Hung, Han-chang Chen, Chia-jung Han
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Patent number: 8830255Abstract: The present invention provides a display device which is arranged so that when an image is scrolled, a noise pattern does not easily overlap the image. The display device includes a display region that includes a region in which an arrangement pattern (U1) including X i-th pixels arranged next to one another in the row direction for each data color, the arrangement pattern being repeated in the row direction, the X being represented by X=A/2+A·Q, where Q is an integer of 0 or greater, and is defined for each row.Type: GrantFiled: July 29, 2010Date of Patent: September 9, 2014Assignee: Sharp Kabushiki KaishaInventors: Kentaroh Irie, Masae Kawabata, Fumikazu Shimoshikiryoh
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Patent number: 8830146Abstract: An EL display device capable of performing clear multi-gradation color display and electronic equipment provided with the EL display device are provided, wherein gradation display is performed according to a time-division driving method in which the luminescence and non-luminescence of an EL element (109) disposed in a pixel (104) are controlled by time, and the influence by the characteristic variability of a current controlling TFT (108) is prevented. When this method is used, a data signal side driving circuit (102) and a gate signal side driving circuit (103) are formed with TFTs that use a silicon film having a peculiar crystal structure and exhibit an extremely high operation speed.Type: GrantFiled: September 19, 2013Date of Patent: September 9, 2014Assignee: Semiconductor Energy Laboratory Co., Ltd.Inventors: Yukio Yamauchi, Takeshi Fukunaga
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Patent number: 8830145Abstract: A pixel circuit includes: a light emitting element whose cathode is connected to a first power source for supplying a first power supply voltage; a first transistor having a first terminal connected to a data line and having a gate terminal; a second transistor connected between the gate terminal of the first transistor and a second terminal of the first transistor and having a gate terminal; a third transistor connected between the second terminal of the first transistor and an anode of the light emitting element and having a gate terminal; a fourth transistor connected between the gate terminal of the first transistor and an initialization power source and having a gate terminal; and a capacitor having one end connected to a power source for supplying a voltage having a fixed potential and the other end connected to the gate terminal of the first transistor.Type: GrantFiled: September 13, 2012Date of Patent: September 9, 2014Assignee: Samsung Display Co., Ltd.Inventors: Takeshi Okuno, Hirofumi Katsuse, Ryo Ishii, Naoaki Komiya
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Patent number: 8830154Abstract: The present invention discloses a liquid crystal display device and its driving circuit. The first switch unit and one of the channels of the scan driver correspond to the pixel units of more than one row. The input terminal of the first switch unit is electrically connected to one of the channels, and each of the output terminals of the first switch unit is electrically connected to a scan line of the pixel units of more than one row for outputting a scan signal from one of channels of the scan driver to the pixel units electrically connected to the corresponding scan line.Type: GrantFiled: April 18, 2012Date of Patent: September 9, 2014Assignee: Shenzhen China Star Optoelectronics Technology Co., LtdInventor: Jinjie Wang
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Patent number: 8830278Abstract: In a liquid crystal display device, image signals are concurrently supplied to pixels provided in a plurality of rows among pixels arranged in matrix in a pixel portion where input of image signals is controlled by transistors including amorphous semiconductors or microcrystalline semiconductors in channel formation regions. Thus, the frequency of input of image signals to each pixel can be increased without changing the response speed of the transistors or the like included in the liquid crystal display device.Type: GrantFiled: April 1, 2011Date of Patent: September 9, 2014Assignee: Semiconductor Energy Laboratory Co., Ltd.Inventors: Jun Koyama, Hiroyuki Miyake, Shunpei Yamazaki
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Publication number: 20140247203Abstract: In a liquid crystal panel, a reflective pixel electrode and a transmissive pixel electrode in a unit pixel are supplied with an image signal output from a data line drive circuit, the two mutually different scanning signals output from a scanning line drive circuit, and common signals output from a common line drive circuit. The phase of the image signal is set different from that of the common signal. Further, a period during which the two scanning signals are selected is set in one horizontal period, the ending of the selection period for one of the scanning signals is set to a point in time before an electrical potential of the common signal changes, and the ending of the selection period for the other scanning signal is set to a point in time after the electrical potential of the common signal changes.Type: ApplicationFiled: May 12, 2014Publication date: September 4, 2014Applicant: NLT TECHNOLOGIES, LTD.Inventors: Kenichi MORI, Michiaki SAKAMOTO
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Publication number: 20140247204Abstract: A pixel circuit, display device, and method of driving a pixel circuit enabling source-follower output with no deterioration of luminance even with a change of the current-voltage characteristic of the light emitting element along with elapse, enabling a source-follower circuit of n-channel transistors, and able to use an n-channel transistor as an EL drive transistor while using current anode-cathode electrodes, wherein a source of a TFT 111 as a drive transistor is connected to an anode of a light emitting element 114, a drain is connected to a power source potential VCC, a capacitor C111 is connected between a gate and source of the TFT 111, and a source potential of the TFT 111 is connected to a fixed potential through a TFT 113 as a switching transistor.Type: ApplicationFiled: May 16, 2014Publication date: September 4, 2014Applicant: Sony CorporationInventors: Katsuhide Uchino, Junichi Yamashita, Tetsuro Yamamoto
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Patent number: 8823754Abstract: To increase the frequency of input of image signals in terms of design in a field-sequential liquid crystal display device. Image signals are concurrently supplied to pixels provided in a plurality of rows among pixels arranged in matrix in a pixel portion of the liquid crystal display device. Thus, the frequency of input of an image signal to each pixel can be increased without change in response speed of a transistor or the like included in the liquid crystal display device.Type: GrantFiled: April 1, 2011Date of Patent: September 2, 2014Assignee: Semiconductor Energy Laboratory Co., Ltd.Inventors: Jun Koyama, Hiroyuki Miyake, Shunpei Yamazaki
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Patent number: 8823009Abstract: The present invention provides a method for manufacturing a highly reliable display device at a low cost with high yield. According to the present invention, a step due to an opening in a contact is covered with an insulating layer to reduce the step, and is processed into a gentle shape. A wiring or the like is formed to be in contact with the insulating layer and thus the coverage of the wiring or the like is enhanced. In addition, deterioration of a light-emitting element due to contaminants such as water can be prevented by sealing a layer including an organic material that has water permeability in a display device with a sealing material. Since the sealing material is formed in a portion of a driver circuit region in the display device, the frame margin of the display device can be narrowed.Type: GrantFiled: June 1, 2012Date of Patent: September 2, 2014Assignee: Semiconductor Energy Laboratory Co., Ltd.Inventors: Shunpei Yamazaki, Satoshi Murakami, Motomu Kurata, Hiroyuki Hata, Mitsuhiro Ichijo, Takashi Ohtsuki, Aya Anzai, Masayuki Sakakura
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Patent number: 8823607Abstract: A pixel circuit having a function of compensating for characteristic variation of an electro-optical element and threshold voltage variation of a transistor is formed from a reduced number of component elements. The pixel circuit includes an electro-optical element, a holding capacitor, a sampling transistor, and a drive transistor. The sampling transistor samples and supplies an input signal from a signal line so as to be held into the holding capacitor. The driving transistor drives the electro-optical element with current in response to the held signal potential. The threshold voltage of the drive transistor is imparted to the holding capacitor in order to cancel an influence of the threshold voltage.Type: GrantFiled: February 5, 2007Date of Patent: September 2, 2014Assignee: Sony CorporationInventors: Katsuhide Uchino, Junichi Yamashita, Tetsuro Yamamoto
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Patent number: 8823668Abstract: Disclosed is a liquid crystal device having improved assembly workability. A liquid crystal device of the present invention is provided with: a liquid crystal panel 31; a liquid crystal panel driver 21 that drives the liquid crystal panel 31; a touch panel 50 disposed on the display surface side of the liquid crystal panel 31; a touch panel driver 22 that drives the touch panel 50; and a flexible substrate 40, which is electrically connected to a control circuit board 12 that controls a drive of the liquid crystal panel 31 and a drive of the touch panel 50. The liquid crystal panel driver 21 and the touch panel driver 22 are electrically connected to the control circuit substrate 12, respectively, through the same flexible substrate 40.Type: GrantFiled: November 10, 2010Date of Patent: September 2, 2014Assignee: Sharp Kabushiki KaishaInventors: Akira Inoue, Isao Kajima
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Patent number: 8823620Abstract: A semiconductor device having a normal function means is provided, in which the amplitude of an output signal is prevented from being decreased even when a digital circuit using transistors having one conductivity is employed. By turning OFF a diode-connected transistor 101, the gate terminal of a first transistor 102 is brought into a floating state. At this time, the first transistor 102 is ON and its gate-source voltage is stored in a capacitor. Then, when a potential at the source terminal of the first transistor 102 is increased, a potential at the gate terminal of the first transistor 102 is increased as well by bootstrap effect. As a result, the amplitude of an output signal is prevented from being decreased.Type: GrantFiled: May 31, 2013Date of Patent: September 2, 2014Assignee: Semiconductor Energy Laboratory Co., Ltd.Inventors: Hajime Kimura, Yutaka Shionoiri
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Patent number: 8823619Abstract: Disclosed herein is a display apparatus, including, a pixel array section including a plurality of pixel circuits arrayed in rows and columns of a matrix and each including a light emitting portion, a plurality of signal lines disposed individually for the pixel columns of the matrix array of the pixel circuits and connected to the pixel circuits belonging to the pixel columns, and a selector circuit for distributing display signals given thereto in a time series from an input signal line time-divisionally to the signal lines, the pixel array section has, in regard to any of combinations of those two signal lines which are individually connected to the pixel circuits which belong to those two pixel columns which neighbor with each other, a first wiring region, and a second wiring region.Type: GrantFiled: April 8, 2013Date of Patent: September 2, 2014Assignee: Sony CorporationInventor: Mitsuru Asano
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Patent number: 8823608Abstract: A display device includes: a pixel array unit with pixel circuits disposed in matrix form, the pixel circuit including a driving transistor, an electro-optic element, a storage capacitor, and a sampling transistor, with the electro-optic element emitting light by generating a driving current based on information stored in the storage capacitor at the driving transistor to be applied to the electro-optic element; and a control unit, of which the output stage includes a buffer transistor, to output a pulse signal for driving the pixel array unit from the buffer transistor; wherein the pixel array unit and the control unit are formed with long laser beam irradiation to be scanned in the vertical direction or horizontal direction; and wherein with the control unit, the size of the buffer transistor is equal to or greater than the pixel pitch in the scanning direction of the laser beam.Type: GrantFiled: March 10, 2008Date of Patent: September 2, 2014Assignee: Sony CorporationInventors: Junichi Yamashita, Katsuhide Uchino
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Publication number: 20140240209Abstract: Disclosed is a shift register, a gate driver and a display apparatus. The shift register comprises: a pulling-up transistor (M3), a pulling-down transistor (M10), an output transistor (M12) and a reset unit, and further comprises an output pulling-down unit for discharging the output terminal and connected to a pulling-down node (PD) of a present stage, a pulling-down node (PD) of an adjacent stage, a low voltage signal terminal (VSS) and an output terminal (OUTPUT) respectively, which turns on the connection between the output terminal and the low voltage signal terminal (VSS) when the pulling-down node (PD) of the present stage or the pulling-down node (PD) of the adjacent stage is at a high level; and a controlling transistor (M14) having a gate connected to the pulling-up node (PU), a drain connected to the pulling-down node (PD) of the adjacent stage, and a source connected to the low voltage signal terminal (VSS).Type: ApplicationFiled: February 18, 2013Publication date: August 28, 2014Applicant: BOE TECHNOLOGY GROUP CO., LTD.Inventor: Yuting Zhang
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Publication number: 20140240268Abstract: An active matrix includes an array of pixels individually addressable over a first frame-frequency range and over a second, higher frame-frequency range. The active matrix also includes, for each pixel of the array, a charging circuit through which that pixel is addressed. Each charging circuit includes an adjustable storage capacitance and is configured such that the storage capacitance is maintained at a first level over the first frame-frequency range, and at a second, lower level over the second frame-frequency range.Type: ApplicationFiled: May 6, 2014Publication date: August 28, 2014Applicant: ScanVue Technologies, LLCInventor: Willem den Boer
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Patent number: 8816949Abstract: In a shift register circuit, a defective operation while an output signal is not outputted and a drive capability lowering while the output signal is outputted are prevented. A unit shift register comprises a first transistor for supplying a clock signal inputted to a first clock terminal to an output terminal, and the first transistor is driven by a drive circuit. A second transistor is connected between the gate of the first transistor and the output terminal and has a gate connected to the first clock terminal. The second transistor connects the gate of the first transistor to the output terminal based on the clock signal when the gate of the first transistor is at L (Low) level.Type: GrantFiled: June 10, 2013Date of Patent: August 26, 2014Assignee: Mitsubishi Electric CorporationInventor: Youichi Tobita
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Publication number: 20140232712Abstract: A scanner includes a plurality of unit circuits configured with transistors of a same conductivity type. In the scanner, the unit circuit constituting the scanner includes an output transistor that selectively outputs, to an output terminal of the unit circuit, a signal given from an outside. A gate electrode of the output transistor is connected to one end of a voltage limiting transistor, and a gate electrode of the voltage limiting transistor is supplied with a first power supply potential.Type: ApplicationFiled: April 28, 2014Publication date: August 21, 2014Applicant: JAPAN DISPLAY WEST INC.Inventor: Yutaka KOBASHI
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Publication number: 20140232626Abstract: An electronic display system has a light transmissive panel, a region of display elements on the panel, and source lines coupled to the display elements. A demultiplexor circuit has multiple groups of pass gates. Each pass gate has a pair of complimentary on-panel transistors, and the signal outputs of each group are connected to a respective group of the source lines. A display driver integrated circuit (IC) receives video data and timing control signals. A signal input of each group of pass gates is connected to a respective output pin of the driver IC. The display driver IC provides digital timing control signals to control the pass gates of the demultiplexor circuit. Other embodiments are also described.Type: ApplicationFiled: January 17, 2014Publication date: August 21, 2014Applicant: Apple Inc.Inventors: Abbas Jamshidi-Roudbari, Ting-Kuo Chang, Hopil Bae, Cheng-Ho Yu, Shih Chang Chang