Synchronizing Means Patents (Class 345/213)
  • Publication number: 20140146035
    Abstract: A driving circuit for driving a display panel includes a dynamic ratioless shift register which is operated in a stable manner and can expand the degree of freedom of design. In the dynamic ratioless shift register which is provided with thin film transistors having semiconductor layers made of p-Si on a substrate surface, a node which becomes the floating state is connected to a fixed potential through a capacitance element.
    Type: Application
    Filed: February 3, 2014
    Publication date: May 29, 2014
    Applicants: PANASONIC LIQUID CRYSTAL DISPLAY CO., LTD., JAPAN DISPLAY INC.
    Inventors: Toshio MIYAZAWA, Iwao TAKEMOTO, Atsushi HASEGAWA, Masahiro MAKI, Kazutaka GOTO
  • Patent number: 8736596
    Abstract: A display panel includes a gate driving circuit, a plurality of gate lines, a plurality of data lines and a dummy gate line. The gate driving circuit is disposed in a peripheral area surrounding a display area. The gate lines are disposed in the display area and receive a plurality of gate signals sequentially outputted from the gate driving circuit. The data lines are disposed in the display area and cross the gate lines. The dummy gate line is disposed adjacent to the last gate line of the gate lines and receives a dummy gate signal transmitted from an external device. Thus, a dummy gate line is adjacent to the last gate line and a pixel electrode connected to the last gate line is affected by a dummy gate signal applied to the dummy gate line.
    Type: Grant
    Filed: July 30, 2009
    Date of Patent: May 27, 2014
    Assignee: Samsung Display Co., Ltd.
    Inventors: Soong-Yong Joo, Young-Bae Jung, Jung-Bae Bae, Jeong-Il Oh
  • Patent number: 8736595
    Abstract: A display driving device and method capable of canceling an offset voltage while suppressing a delay in outputting an image signal to the display device by the time required for the image signal to be completely received in the display device. In an exemplary embodiment, when an image signal is input to an operational amplifier, a pixel of the display device, to which a voltage based on the image signal is applied, and an output terminal of the operational amplifier are connected to each other. The image signal is input to the operational amplifier, and, when charges corresponding to an offset voltage generated in the operational amplifier have accumulated in a capacitor, the image signal is input to the operational amplifier together with the charges accumulated in the capacitor while the connection between the pixel and the output terminal of the operational amplifier is maintained.
    Type: Grant
    Filed: February 3, 2009
    Date of Patent: May 27, 2014
    Assignee: Oki Semiconductor Co., Ltd
    Inventor: Atsushi Hirama
  • Patent number: 8730230
    Abstract: The present invention provides an image/graphics data display mechanism for continuously displaying image/graphics data on multiple display devices of a computer that contains a system memory directly accessed by the computer's CPU during the CPU's power saving non-responding period, wherein there is provided sufficient system bandwidth, the mechanism of the present invention is independent on the resolution running on each display device and the number of display devices connected to the computer system. The mechanism provides two approaches to achieve continuous display of image/graphics data on multiple display devices computer system. In the first approach, a common clock source is used to coordinate display device horizontal synchronization signals, vertical synchronization signals, horizontal blank periods, and vertical blank periods. In the second approach, the mechanism has a control on the lengths and occurrences of the display device blank periods.
    Type: Grant
    Filed: August 12, 2003
    Date of Patent: May 20, 2014
    Assignee: VIA Technologies, Inc.
    Inventors: Yi-Fang Michael Shiuan, Xinwei Yang, Jinming Gu, Iming Pai
  • Patent number: 8730149
    Abstract: A method for backlight control includes: receiving a display synchronization signal; generating a backlight control signal according to the display synchronization signal; and driving a backlight source according to the backlight control signal. An apparatus for backlight control includes: a signal receiving circuit, for receiving a display synchronization signal; a control circuit, coupled to the signal receiving circuit, for generating a backlight control signal according to the display synchronization signal; and a driving circuit, coupled to the control circuit, for driving a backlight source according to the backlight control signal.
    Type: Grant
    Filed: August 11, 2009
    Date of Patent: May 20, 2014
    Assignee: ILI Technology Corp.
    Inventors: Wei-Shan Chiang, Meng-Yong Lin, Wei-Yang Ou, Chen-Hsien Han, Ming-Huang Liu
  • Patent number: 8723767
    Abstract: A display device including a display unit including first and second lines, light emitting elements and pixel circuits; a first drive unit sequentially applying a selection pulse to the first lines; and a second drive unit applying a signal pulse including first to third voltages to each of the second lines. Each of the pixel circuits includes a first transistor sampling the signal pulse, and a second transistor driving one of the light emitting elements. The first drive unit applies the selection pulse when the first voltage is being applied by the second drive unit, before a correction of a threshold voltage of the second transistor is initiated and within a period that the one of the light emitting elements is being turned out, and the first drive unit applies the selection pulse when the second voltage is being applied by the second drive unit.
    Type: Grant
    Filed: March 20, 2013
    Date of Patent: May 13, 2014
    Assignee: Sony Corporation
    Inventors: Naobumi Toyomura, Katsuhide Uchino
  • Publication number: 20140125648
    Abstract: A gate driver includes a plurality of stages respectively outputting a plurality of gate output signals. An N-th stage of the gate driver (where N is a positive integer) includes a first input part, a second input part, a pull up part, a pull down part, a holding part and a stabilizing part. The first input part transmits a first clock signal to a second node in response to a signal at a first node. The second input part transmits an input signal to the first node in response to a second clock signal. The pull up part pulls up the gate output signal in response to a signal at the second node. The pull down part pulls down the gate output signal in response to the signal at the first node. The holding part maintains the signal at the second node in response to the first clock signal. The stabilizing part stabilizes the gate output signal in response to the signal at the second node and a third clock signal.
    Type: Application
    Filed: August 6, 2013
    Publication date: May 8, 2014
    Inventors: Bo-Yong CHUNG, Jung-Mi CHOI
  • Patent number: 8717349
    Abstract: A source driver adapted to drive a display panel is provided herein. The source driver includes a first output buffer, a detection module and a conversion module. The first output buffer enhances a first pixel signal and thereby outputs a first enhanced pixel signal. The detection module detects a rise time of the first enhanced pixel signal. The conversion module adjusts a driving capability of the first output buffer in response to the rise time for adjusting a slew rate of the first output buffer. Therefore, the first output buffer in the source driver can dynamically and automatically adjusts the slew rate of the first output buffer through a feedback mechanism composed of the detection module and the conversion module.
    Type: Grant
    Filed: August 28, 2009
    Date of Patent: May 6, 2014
    Assignees: Himax Technologies Limited, NCKU Research & Development Foundation
    Inventors: Chien-Hung Tsai, Jia-Hui Wang, Chin-Tien Chang, Ying-Lieh Chen
  • Patent number: 8717348
    Abstract: System and method for synchronizing shutter glasses with a display system. An embodiment comprises displaying a first image from a first image stream on a display plane, displaying a second image from a second image stream on the display plane, and displaying a synchronization signal on the display plane, during a first, a second, and a third display period, respectively. The first image and the second image are displayed at least partially on the same area of the display plane and the first and the second display periods do not overlap. The display of the synchronization signal on the display plane enables the elimination of a dedicated synchronization signal broadcast unit, thereby reducing the cost while increasing the reliability of a display system.
    Type: Grant
    Filed: December 22, 2006
    Date of Patent: May 6, 2014
    Assignee: Texas Instruments Incorporated
    Inventors: Gregory Raymond Basile, Frank Joseph Poradish
  • Publication number: 20140118331
    Abstract: A display device includes a display panel including gate lines, data lines, and pixels each connected to a corresponding gate line and a corresponding data line, a gate driver configured to drive the gate lines, a data driver configured to drive the data lines, and a timing controller configured to generate control signals to control the data driver and to apply a vertical synchronization start signal including a first pulse, a second pulse, a first gate pulse signal, and a second gate pulse signal to the gate driver. The gate driver applies gate driving signals to the gate lines to pre-charge the pixels in response to the first pulse of the vertical synchronization start signal and the first gate pulse signal, and to main-charge the pixels in response to the second pulse of the vertical synchronization start signal and the second gate pulse signal.
    Type: Application
    Filed: July 23, 2013
    Publication date: May 1, 2014
    Applicant: Samsung Display Co., Ltd.
    Inventors: ByungKil JEON, Yong-Bum KIM, Dong-Hyun YEO, Suhyun JEONG, Heebum PARK, Junpyo LEE
  • Patent number: 8711087
    Abstract: A method for driving an electrophoretic display device, which includes a first electrode, a second electrode, and an electrophoretic element disposed between the first electrode and the second electrode, the method includes: setting a multiplication of a driving voltage and a voltage application time of the electrophoretic element in a unit period, which displays a first gradation with minimum reflectivity, and a multiplication of a driving voltage and a voltage application time of the electrophoretic element in the unit period, which displays a second gradation with maximum reflectivity, so as to be different from each other.
    Type: Grant
    Filed: January 25, 2010
    Date of Patent: April 29, 2014
    Assignee: Seiko Epson Corporation
    Inventors: Yoshiki Takei, Eiji Miyasaka
  • Patent number: 8711139
    Abstract: A stereoscopic display includes an image displayer. The image displayer includes a display that is configured to sequentially display a right-eye image and a left-eye image. The display includes a first region that includes first rows and a second region that includes second rows. A method of driving the stereoscopic display includes sequentially repeating: writing first image data to the second region when the first region is in an image displaying state; setting the second region to the image displaying state and the first region to an image not-displaying state after the image data is written to the second region; writing second image data to the first region when the second region is in the image displaying state; and setting the first region to the image displaying state and the second region to the image not-displaying state after the second image data is written to the first region.
    Type: Grant
    Filed: June 29, 2011
    Date of Patent: April 29, 2014
    Assignee: Panasonic Corporation
    Inventors: Shinya Tsuchida, Shinya Ono
  • Publication number: 20140111503
    Abstract: A light emission driver for a display device is disclosed. In one aspect, the driver includes a first node to which first and second light emitting power source voltages are applied according to respective clock signals. The driver also includes a second node to which the first and third light emitting power source voltages are applied according to the respective clock signals. The driver further includes first and second transistors respectively turned on by the first and second nodes and respectively transmitting the second and first light emitting power source voltages to a light emitting signal output terminal, respectively.
    Type: Application
    Filed: May 28, 2013
    Publication date: April 24, 2014
    Inventors: Tae-Hoon Kwon, Ji-Hyun Ka
  • Publication number: 20140111502
    Abstract: The present disclosure discloses a scan driving circuit of a liquid crystal display (LCD) panel, an LCD device and a driving method. The scan driving circuit of the LCD panel includes a time delay component. An input end of the time delay component is coupled to an output enable. An output end of the time delay component is coupled to a dock voltage pulse. A delay time of the time delay component is less than an action time of a single output enable cycle.
    Type: Application
    Filed: October 26, 2012
    Publication date: April 24, 2014
    Inventor: Dongsheng Guo
  • Patent number: 8704811
    Abstract: The present invention provides an active matrix image display apparatus including an organic EL element capable of efficiently arranging a wiring pattern on an insulating substrate compared to the related art. The present invention provides a dummy region arranged at the outermost periphery of a display unit as a scanning line coupling region or a pitch conversion region. A power supply scanning line is commonly used by a pixel circuit of an odd-numbered line and a pixel circuit of a following even-numbered line.
    Type: Grant
    Filed: October 31, 2013
    Date of Patent: April 22, 2014
    Assignee: Sony Corporation
    Inventors: Tomoaki Handa, Takayuki Taneda, Katsuhide Uchino
  • Patent number: 8704819
    Abstract: There is provided a display device capable of displaying an image that barely changes with low power consumption on the basis of video data included in a transmitted command, and there is also provided a method for driving the same. A display timing controller (31) determines every frame period whether or not an externally transmitted command includes updated video data. As a result, when it is determined that no updated video data is included, screen refreshing is paused by not reading video data stored in frame memory (36). Moreover, when it is determined that updated video data is included, the screen refreshing is performed by reading video data stored in the frame memory (36).
    Type: Grant
    Filed: August 29, 2012
    Date of Patent: April 22, 2014
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Yasuyuki Ogawa, Seiji Kaneko, Kaoru Yamamoto, Kohhei Tanaka, Seiichi Uchida, Yutaka Takamaru, Shigeyasu Mori
  • Patent number: 8698726
    Abstract: There is provided an SSD display device with reduced power consumption. A selection circuit (400) consists of k selection blocks (410(1) to 410(k)). Each selection block consists of three thin-film transistors. The three thin-film transistors respectively have three phases of selection control signal (CT) provided to their gate terminals. A scanning period (T1) is provided and followed by an idle period (T2). In the idle period (T2), the three thin-film transistors in each selection block are brought into ON state in accordance with selection control signals (CT) at an idle period frequency (fck2). The idle period frequency (fck2) is lower than a scanning period frequency (fck1).
    Type: Grant
    Filed: July 25, 2012
    Date of Patent: April 15, 2014
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Kaoru Yamamoto, Seiji Kaneko, Yasuyuki Ogawa, Kohhei Tanaka, Seiichi Uchida, Yutaka Takamaru, Shigeyasu Mori
  • Publication number: 20140098083
    Abstract: An organic light emitting display device includes a scan driving unit supplying a first scan signal and a second scan signal to each of a plurality of scan lines; a data driving unit supplying data signals to each of a plurality of data lines to be synchronized with the second scan signal; pixels positioned at intersections of the scan lines with the data lines, receiving bias power when the first scan signal is supplied, and receiving the data signals when the second scan signal is supplied.
    Type: Application
    Filed: June 3, 2013
    Publication date: April 10, 2014
    Inventors: Dong-Hwan LEE, Seung-Kyun HONG, So-Young PARK, In-Soo LEE
  • Patent number: 8692822
    Abstract: A display controller is capable of changing a refresh rate, indicative of how often a screen displayed on a display device having a plurality of pixels is switched, between a low refresh rate of 40 Hz and a normal refresh rate of 60 Hz and generates (i) a dot clock (reference clock) serving as a timing signal indicative of a timing of operation in the display device, (ii) video data indicative of an image to be displayed on the screen, (iii) Hsync for defining a horizontal period of a display on the screen, and (vi) Vsync for defining a vertical period of the display on the screen, so as to supply the dot clock, the video data, Hsync, and Vsync to the display device, wherein the display controller includes a dot clock generation circuit for generating the reference clock whose frequency is constant without depending on a change of the refresh rate.
    Type: Grant
    Filed: March 27, 2007
    Date of Patent: April 8, 2014
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Toshihiro Yanagi, Takuji Miyamoto, Atsuhito Murai
  • Patent number: 8692824
    Abstract: The invention discloses a driving apparatus for driving an LCD. The driving apparatus comprises a voltage control unit, an operating unit, a resistance unit, and a voltage selection unit. The operating unit comprises two sets of buffers formed by a plurality of operational amplifiers in negative feedback circuit. The two sets of buffers selectively receive positive polarity voltages and negative polarity voltages respectively. The voltage selection unit is provided with the positive polarity voltages and negative polarity voltages through the operating unit and the resistance unit. The voltage selection unit selectively provides the pixels of the LCD with the positive polarity voltage and the negative polarity voltage. Accordingly, each of the pixels is provided either with the positive polarity voltages or the negative polarity voltages by one of the two sets of buffers.
    Type: Grant
    Filed: October 30, 2008
    Date of Patent: April 8, 2014
    Assignee: Raydium Semiconductor Corporation
    Inventors: Yong-Nien Rao, Yu-Lung Lo, Chih-Yu Lee
  • Patent number: 8692758
    Abstract: A display device of an embodiment of the present invention is a display device of an active matrix type, and includes a display driver supplied with image data included in serial data by serial transmission. The serial data has a first flag for specifying a polarity of voltage of a common electrode added thereto. The display driver generates, in accordance with a timing of a serial clock, a timing signal for a horizontal period for a data signal line driver, and a timing signal for a gate signal line driver. This realizes a display device capable of easily generating, within a driver IC, a timing signal for writing the image data in pixels.
    Type: Grant
    Filed: January 29, 2009
    Date of Patent: April 8, 2014
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Noboru Matsuda, Isao Takahashi, Takahiro Yamaguchi
  • Publication number: 20140092082
    Abstract: An LCD device according to an embodiment includes a liquid crystal display panel in which n gate lines are formed; a timing controller to generate first to sixth clock signals; a first gate driver to apply a high gate voltage to one ends of the (2k?1)th gate lines in response to the first, third and fifth clock signals; a second gate driver to apply the high gate voltage to one ends of the (2k)th gate lines in response to the second, fourth and sixth clock signals; left discharge circuits each to apply a low gate voltage to the other end of the (2k?1)th gate line according to a voltage level on (2k+1)th gate line; and right discharge circuits each to apply the low gate voltage to the other end of the (2k)th gate line according to the voltage level on (2k+2)th gate line.
    Type: Application
    Filed: December 26, 2012
    Publication date: April 3, 2014
    Applicant: LG DISPLAY CO., LTD.
    Inventor: Joung Mi CHOI
  • Publication number: 20140092081
    Abstract: A driving method of a liquid crystal display (LCD) device includes a step A and a step B. In the step A, using frequency conversion on a received source image signal when a type of the received source image signal is different from a preset target frequency, and converting a display frequency of the received source image signal into a target frequency, generating a target image signal based on the target frequency. In the step B, performing an overvoltage drive output using an overvoltage driving table matching with the target frequency of the target image signal.
    Type: Application
    Filed: October 29, 2012
    Publication date: April 3, 2014
    Applicant: SHENZHEN CHINA STAR OPTOELECTRONICS TECHNOLOGY CO., LTD.
    Inventors: Liangchan Liao, Yuyeh Chen, Yinhung Chen
  • Publication number: 20140092149
    Abstract: A pixel of a display apparatus includes at least a first transistor and at least a second transistor. A cell of transparent fluid including particles charged to have different polarities from each other is arranged between a pixel electrode and a common electrode. The first and second transistors are connected to the pixel electrode. The pixel is drivable according to pulse amplitude modulation (PAM) and pulse width modulation (PWM) such that a frame of an image is displayable using a single field.
    Type: Application
    Filed: December 3, 2013
    Publication date: April 3, 2014
    Applicant: Samsung Electronics Co., Ltd.
    Inventor: Jung-woo KIM
  • Patent number: 8681094
    Abstract: A display apparatus and a method for controlling the display apparatus are provided. If a display apparatus is in a power off state and an interface is connected to a cable, an output of a cable connection sensing signal is blocked. Accordingly, the display apparatus may be able to report its power off state to an external device.
    Type: Grant
    Filed: June 24, 2010
    Date of Patent: March 25, 2014
    Assignee: Samsung Electronics Co., Ltd.
    Inventor: Young-kook Kim
  • Publication number: 20140078133
    Abstract: A panel display apparatus is provided which includes a timing controller, a plurality of source drivers, a first data path, and a second data path. The first data path and the second data path are both coupled between the timing controller and the source drivers. The timing controller transmits multiple display data to the source drivers via the first data path. When the source drivers detect an event (e.g. error event), the source drivers transmit at least one event data (e.g. notification data) to the timing controller via the second data path to notify the timing controller that event correction (e.g. error correction) is needed.
    Type: Application
    Filed: September 2, 2013
    Publication date: March 20, 2014
    Applicant: Novatek Microelectronics Corp.
    Inventors: Hsin-Hung Lee, Jr-Ching Lin, Chia-Wei Su, Po-Yu Tseng, Shun-Hsun Yang, Po-Hsiang Fang
  • Patent number: 8674977
    Abstract: A driving method of a display device having a driving transistor and a display element, one source/drain region of the driving transistor connected to a power supply part, the other source/drain region connected to an anode electrode provided in the display element, the method includes the steps of: setting a potential of the anode electrode by applying a predetermined intermediate voltage to the anode electrode so that a potential difference between the anode electrode of the display element and a cathode electrode at the other end of the display element does not exceed a threshold voltage of the display element; and then holding the driving transistor in OFF-state while a drive voltage is applied from the power supply part to one source/drain region of the driving transistor.
    Type: Grant
    Filed: December 22, 2009
    Date of Patent: March 18, 2014
    Assignee: Sony Corporation
    Inventors: Junichi Yamashita, Katsuhide Uchino
  • Patent number: 8674906
    Abstract: An organic light emitting display device operates for an initializing period, a scan period and an emission period divided from one frame period. The organic light emitting display device includes: a data driver for supplying data signals to output lines; a connecting unit for selectively coupling a data line of data lines to a corresponding one of the output lines or an initial power supply, and being positioned between the output lines and the data lines; a second power driver for applying second power having a low level and a high level to pixels positioned at crossing regions of scan lines and the data lines; and a first control line commonly coupled to the pixels, in which each of the pixels includes an organic light emitting diode, and an anode electrode of the organic light emitting diode is supplied with a voltage of the initial power supply for the initializing period.
    Type: Grant
    Filed: January 10, 2011
    Date of Patent: March 18, 2014
    Assignee: Samsung Display Co., Ltd.
    Inventors: Young-In Hwang, Yong-Sung Park, Chul-Kyu Kang, Seong-Il Park
  • Publication number: 20140071176
    Abstract: An organic light emitting display device capable of improving image quality. A driving method of an organic light emitting display device in which a plurality of sub-fields may be included in one frame, wherein a first sub-field includes an initialization period in which voltage of an initialization power supply is supplied to a gate electrode of a driving transistor included in each of the pixels, a scan period that voltage corresponding to a data signal is stored in the pixels, and a light emitting period that the pixels emit light, and wherein the remaining sub-fields with the exception of the first sub-field include only a scan period and a light emitting period.
    Type: Application
    Filed: February 22, 2013
    Publication date: March 13, 2014
    Applicant: SAMSUNG DISPLAY CO., LTD.
    Inventor: Yang-Wan KIM
  • Patent number: 8669975
    Abstract: A driving circuit of an electro-optical device, a capacitance-line-driving circuit shifting voltage of a capacitance line to one voltage of two-value voltage, and the capacitance-line-driving circuit includes a unit control circuit provided correspondingly to the capacitance line at both end portions of the capacitance line, and the unit control circuit corresponding to one capacitance line includes, a latch circuit maintaining a logic level at one level for at least a period of the scanning line corresponding to the one capacitance line being selected, a switch provided between the capacitance line and a signal line supplying a capacitance signal in which the two-value voltage is switched over at a predetermined cycle, the switch being electrically connected when the logic level is one level and electrically disconnected when the logic level is the other level.
    Type: Grant
    Filed: October 7, 2009
    Date of Patent: March 11, 2014
    Assignee: Japan Display West Inc.
    Inventor: Shin Fujita
  • Patent number: 8671359
    Abstract: A scroll display control device is provided, which is capable of scroll-displaying a text corresponding to a picture in such manner that the text can be easily understood. The scroll display control device scroll-displays, in synchronism with reproduction of the picture correlated to text information (TI), the corresponding text information (TI) on a text display screen (TW). A scroll speed calculation unit (102) dynamically calculates a text scroll speed (v) on the basis of a time length of a picture section presently under reproduction, a text quantity of the corresponding text section and text display setting information. A picture text control unit (104) scroll-displays text of the text section at a predetermined reference position of the text display screen (TW) according to the scroll speed (v). By displaying preceding and succeeding texts with respect to the text corresponding to the picture section presently under reproduction, it is possible to read back and pre-read.
    Type: Grant
    Filed: March 5, 2004
    Date of Patent: March 11, 2014
    Assignee: NEC Corporation
    Inventors: Hirokazu Koizumi, Naohiro Takeda, Makoto Iwata, Ryoma Oami
  • Patent number: 8669974
    Abstract: A timing controller adapted to a flat display includes a voltage detecting circuit, a clock generator, a first multiplexer and a second multiplexer. The voltage detecting circuit detects a variation of an operating voltage and thus outputs a reset signal. The clock generator outputs a start signal and a first clock signal. The first multiplexer is controlled by the reset signal and coupled to the start signal and a constant voltage. The second multiplexer is controlled by the reset signal and coupled to the first clock signal and a second clock signal. A frequency of the second clock signal is obviously higher than a frequency of the first clock signal.
    Type: Grant
    Filed: June 13, 2007
    Date of Patent: March 11, 2014
    Assignee: Himax Technologies Limited
    Inventors: Yu-Chu Yang, Fa-Ming Chen, Po-Hsien Tsai, Mao-Hsiung Kuo
  • Patent number: 8665255
    Abstract: An object of the present invention is to provide a power supply circuit including a charge-pumping booster section which uses switching elements provided only by N-channel transistors yet does not have a problem of voltage drop by threshold value. In a booster section (11a), capacitors (C1) and (C2) have their respective first terminals connected with transistors (Q1, Q3) and (Q2, Q4) respectively. Each transistor has its gate terminal supplied with control signals generated in a driver section (11b). The driver section (11b) includes capacitors (C3, C4) connected with input terminals (Ti3, Ti4) for respective supply of clock signals DCK2, DCK2B each having a voltage alternating between ?VDD and VDD (VDD represents an input supply voltage from outside), as level-shifted signals of clock signals DCK1, DCK1B which are supplied to second terminals of the capacitors (C1, C2) respectively.
    Type: Grant
    Filed: July 24, 2008
    Date of Patent: March 4, 2014
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Sachio Tsujino, Shuji Nishi, Yuhichiroh Murakami, Yasushi Sasaki, Seijirou Gyouten
  • Publication number: 20140055444
    Abstract: An emission control driver includes stages sequentially outputting emission control signals through emission control lines. Each stage includes a first signal processor receiving a first voltage and generating first and second signals in response to first and second sub-control signals, a second signal processor receiving a second voltage having a level higher than a level of the first voltage and generating third and fourth signals in response to the third sub-control signal, the first signal, and the second signal, and a third signal processor receiving the first and second voltages and generating the emission control signal in response to the third and fourth signals. The first signal processor of each stage receives the emission control signal output from a previous stage as the first sub-control signal, and the first signal processor of a first stage among the stages receives a start signal as the first sub-control signal.
    Type: Application
    Filed: March 1, 2013
    Publication date: February 27, 2014
    Inventor: Hwan Soo JANG
  • Patent number: 8659537
    Abstract: Disclosed are a backlight unit and a display device. The backlight unit includes alight emitting module including a plurality of light emitting devices; a controller for controlling an operation of the light emitting module; a light guide plate disposed at one side of the light emitting module; and an optical member disposed on or under the light guide plate. The light emitting module includes a first light emitting device and a second light emitting device. Light linearity of the first light emitting device is superior to light linearity of the second light emitting device, and a light orientation angle of the first light emitting device is smaller than a light orientation angle of the second light emitting device. The controller selectively drives the first and second light emitting devices.
    Type: Grant
    Filed: January 12, 2011
    Date of Patent: February 25, 2014
    Assignee: LG Innotek Co., Ltd.
    Inventor: Sung Min Kong
  • Patent number: 8659588
    Abstract: A display substrate includes a base substrate including a display area and a peripheral area, a pixel disposed on the display area, wherein the pixel includes; a pixel transistor connected to a gate line and a data line which cross each other, and a pixel electrode connected to the pixel transistor and the pixel electrode, and a gate driving circuit disposed on the peripheral area, wherein the gate driving circuit outputs a gate signal to the gate line and comprises a plurality of stages, an n-th stage of the gate driving circuit including a plurality of circuit transistors and a boosting capacitor including a first capacitor and a second capacitor, the plurality of circuit transistors and the first capacitor being disposed on a first area and the second capacitor being disposed on a second area of the peripheral area positioned between the first area and the display area.
    Type: Grant
    Filed: May 19, 2011
    Date of Patent: February 25, 2014
    Assignee: Samsung Display Co., Ltd.
    Inventor: Bon-Yong Koo
  • Publication number: 20140049532
    Abstract: A display device includes a data driver for applying a data signal to a data line; a gate driver for applying a gate signal to a gate line; a level shifter for shifting a voltage level of a signal applied to the gate driver; and a signal controller for controlling the data driver, the level shifter, and the gate driver, wherein when a signal exchange between the data driver and the signal controller has an abnormality, the signal controller maintains a control signal applied to the level shifter in an off level.
    Type: Application
    Filed: January 4, 2013
    Publication date: February 20, 2014
    Applicant: SAMSUNG DISPLAY CO., LTD.
    Inventors: Kyung-Uk Choi, Seon Hye Kim, Sang Hyun Lee, Jeong Bong Lee
  • Publication number: 20140049533
    Abstract: A display module of the present invention includes: a plurality of source drivers (SDa); a plurality of memory sections (30a, 30b) respectively provided for the plurality of source drivers (SDa), each of the plurality of memory sections (30a, 30b) being for storage of at least data of a video signal to be displayed on that one of a plurality of divided regions for which that one of the plurality of source drivers is provided, for which the memory section (30a, 30b) is provided; and timing control means (33a) serving as sync control means for synchronizing the plurality of source drivers (SDa) to synchronously output video signals that the plurality of source drivers (SDa) output based on data respectively supplied from the plurality of memory sections (30a, 30b), so that the synchronized video signals are supplied to corresponding ones of the plurality of divided regions.
    Type: Application
    Filed: April 23, 2012
    Publication date: February 20, 2014
    Applicant: SHARP KABUSHIKI KAISHA
    Inventors: Kohji Saitoh, Asahi Yamato, Masami Ozaki, Toshihiro Yanagai
  • Publication number: 20140049528
    Abstract: A display device including a voltage generator is disclosed. The voltage generator includes an analog driving voltage generator to convert a source voltage from an external source to an analog driving voltage and to output the analog driving voltage through an output terminal, a capacitor connected between the output terminal and a ground voltage node, and a discharge circuit connected between the output terminal and the ground voltage node to discharge a current at the output terminal in response to a blank synchronization signal.
    Type: Application
    Filed: January 2, 2013
    Publication date: February 20, 2014
    Applicant: Samsung Display Co., Ltd.
    Inventors: Bon-Sung KOO, Jong Jae LEE, Eui-Dong HWANG
  • Patent number: 8654115
    Abstract: A gate driver includes: a scan signal output circuit for performing alternately scanning whereby either odd-numbered scan signal lines or even-numbered scan signal lines are sequentially driven and scanning whereby the remaining scan signal lines are sequentially driven; a rise counter circuit for sensing the rise count for a clock signal in a HIGH level period of an externally supplied start signal; a scan sequence setup circuit for setting up a scan sequence to be followed by the scan signal output circuit according to the rise count; and a start signal generating circuit for generating a start signal to be supplied to a next scan signal line driver circuit. Hence, the resultant scan signal line driver circuit and method thereof is capable of producing high quality images at low cost while restricting power consumption and heat generation by a data signal line driver circuit.
    Type: Grant
    Filed: June 5, 2012
    Date of Patent: February 18, 2014
    Assignee: Sharp Kabushiki Kaisha
    Inventor: Takuya Watanabe
  • Patent number: 8654056
    Abstract: Disclosed is a display apparatus including two scanning circuits of the same configuration and layout, arranged on either sides of the display part. As long as one of the scanning circuits is in operation, the other scanning circuit is in a state in which no output signal is output.
    Type: Grant
    Filed: December 29, 2011
    Date of Patent: February 18, 2014
    Assignee: NLT Technologies, Ltd.
    Inventors: Tomohiko Otose, Masamichi Shimoda
  • Patent number: 8654114
    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: July 29, 2008
    Date of Patent: February 18, 2014
    Assignee: Canon Kabushiki Kaisha
    Inventors: Hisae Shimizu, Katsumi Abe, Ryo Hayashi
  • Publication number: 20140043317
    Abstract: A display device including a display panel including gate and data line that cross each other; a first control signal generation unit generating a source output enable signal and a first gate output enable signal in synchronization with a data enable signal modulated according to a spread frequency clock signal; a second control signal generation unit starting to count a number of clocks of a fixed-frequency clock signal based on a point of time at which a first state of the source output enable signal ends, and outputting a second gate output enable signal when the counted number of the clocks becomes equal to a reference value; and a gate driving unit controlling an outputting of a gate signal to the gate lines using the second gate output enable signal.
    Type: Application
    Filed: August 8, 2013
    Publication date: February 13, 2014
    Applicant: LG DISPLAY CO., LTD.
    Inventors: Young-Ho KIM, Tae-Wook LEE, Jae-Hak KIM
  • Patent number: 8648841
    Abstract: A scan-line driving device for a LCD apparatus is provided. The scan-line driving device comprises a PWM signal generating circuit, two impedances with different resistance values, a capacitor and two scan drivers. The PWM signal generating circuit outputs a PWM signal with two potentials and a predetermined duty cycle. A terminal of the capacitor is electrically coupled to a ground potential, and the other terminal of the capacitor receives the PWM signal. Each of the scan drivers comprises a core circuit and a transistor. A source/drain terminal of each transistor is electrically coupled to a PWM signal input terminal of a corresponding core circuit and the other terminal of the capacitor, the other source/drain terminal of each transistor is electrically coupled to the ground potential through a corresponding one of the impedances, and the gate terminal of each transistor receives a turn-on control signal.
    Type: Grant
    Filed: September 29, 2011
    Date of Patent: February 11, 2014
    Assignee: AU Optronics Corp.
    Inventor: Meng-Sheng Chang
  • Patent number: 8643633
    Abstract: One frame period of image data is divided into a plurality of subframes and driven. A first subframe included in one frame and a second subframe following the first subframe are output at opposite polarities. The image data is output while switching a phase mode between a first mode of driving the first subframe at positive polarity and the second subframe at negative polarity and a second mode of driving the first subframe at negative polarity and the second subframe at positive polarity.
    Type: Grant
    Filed: August 7, 2012
    Date of Patent: February 4, 2014
    Assignee: Canon Kabushiki Kaisha
    Inventor: Yukihiko Sakashita
  • Patent number: 8643781
    Abstract: Methods and systems for implementing video driving circuitry are disclosed. For example, in an embodiment, a system for driving a plurality of different types of video devices is disclosed. The system includes, for example, a System on a Chip (SoC) that itself includes a Liquid Crystal Display (LCD) controller circuit configured to generate digital video data, a first synchronization signal for controlling a first characteristic of the digital video data, and a second synchronization signal for controlling a second characteristic of the digital video data. The SoC further includes a delay circuit configured to variably delay the first synchronization signal and the second synchronization signal relative to the digital video data to generate a delayed first synchronization signal and a delayed second synchronization signal.
    Type: Grant
    Filed: December 29, 2010
    Date of Patent: February 4, 2014
    Assignee: Marvell Israel (M.I.S.L) Ltd.
    Inventors: Dan Ilan, Guy Nakibly, Eilon Argov
  • Patent number: 8643638
    Abstract: The display device includes a driving circuit and a panel. The driving circuit is configured to generate a source output enable signal having at least one pulse during one horizontal scanning period in response to a mode signal and configured to generate a source driving signal by latching an image data in response to the source output enable signal. The driving circuit is further configured to generate an internal horizontal synchronization signal in response to the source output enable signal and configured to generate a gate driving signal in response to the internal horizontal synchronization signal. The panel is configured to display the image data in response to the gate driving signal and the source driving signal.
    Type: Grant
    Filed: December 17, 2009
    Date of Patent: February 4, 2014
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Jong-Kon Bae, Hae-Woon Park, Min-Hwa Jang, Han-Min Cho, Young-Bae Moon
  • Publication number: 20140028659
    Abstract: A liquid crystal material is prevented from being degraded by a voltage to control the shift of the threshold voltage which is applied to a back gate on the same conductive film as a pixel electrode. A liquid crystal display device includes a pixel circuit including a pixel electrode which applies an electric field to a liquid crystal layer; and a driver circuit including a transistor including a first gate and a second gate with a semiconductor film interposed therebetween. The transistor overlaps with the liquid crystal layer. A signal for controlling on/off of the transistor is input to the first gate. A signal for applying a first voltage is input to the second gate in a gate line selection period. A signal for alternately applying the first voltage and a second voltage is input to the second gate in a vertical retrace period.
    Type: Application
    Filed: July 24, 2013
    Publication date: January 30, 2014
    Applicant: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Shunpei YAMAZAKI, Jun KOYAMA
  • Publication number: 20140022234
    Abstract: There is provided a display device capable of displaying an image that barely changes with low power consumption on the basis of video data included in a transmitted command, and there is also provided a method for driving the same. A display timing controller (31) determines every frame period whether or not an externally transmitted command includes updated video data. As a result, when it is determined that no updated video data is included, screen refreshing is paused by not reading video data stored in frame memory (36). Moreover, when it is determined that updated video data is included, screen refreshing is performed by reading video data stored in the frame memory (36).
    Type: Application
    Filed: August 29, 2012
    Publication date: January 23, 2014
    Applicant: SHARP KABUSHIKI KAISHA
    Inventors: Yasuyuki Ogawa, Seiji Kaneko, Kaoru Yamamoto, Kohhei Tanaka, Seiichi Uchida, Yutaka Takamaru, Shigeyasu Mori
  • Patent number: 8633923
    Abstract: In order that a boost converter of an LDI can reduce electromagnetic interference by generating a panel driving voltage through the use of a variable frequency, while achieving a stable boosting operation using the same frequency whenever each frame begins, an oscillator generates an oscillation signal having a frequency, which varies in a predetermined pattern or hops in a random pattern around a center frequency, and generates an oscillation signal having a preset fixed frequency whenever each frame begins.
    Type: Grant
    Filed: July 1, 2010
    Date of Patent: January 21, 2014
    Assignee: Silicon Works Co., Ltd.
    Inventors: Yong-Sung Ahn, Jung-Min Choi, Sang-Rok Cha