Field Period Polarity Reversal Patents (Class 345/96)
  • Patent number: 8659528
    Abstract: An electro-optical device includes: a data line driver applying the signal potential in such a manner that a writing polarity is reversed more than once in the field time period, and the writing polarity of each of sub field time periods making up a certain field time period is the opposite of the writing polarity of the corresponding one of sub field time periods making up the next field time period; a scanning line driver applying the scanning signal in such a manner that a total length of the sub field time periods in which writing in one polarity is performed in each cycle of two consecutive fields one of which is an odd field and the other of which is an even field is different from a total length of the sub field time periods in which writing in the other polarity is performed in the each cycle of two consecutive fields.
    Type: Grant
    Filed: November 10, 2010
    Date of Patent: February 25, 2014
    Assignee: Seiko Epson Corporation
    Inventor: Hiroyuki Hara
  • Publication number: 20140043311
    Abstract: Embodiments of the present disclosure provide a liquid crystal display driving circuit, a driving method thereof and a liquid crystal display, and relate to a field of display technique. The liquid crystal display driving circuit comprises a timing control circuit and at least two source driving circuits, and further comprises a polarity inversion circuit; the timing control circuit is configured to transmit a polarity inversion signal to the polarity inversion circuit; the polarity inversion circuit is configured to convert the polarity inversion signal into a first polarity inversion signal and a second polarity inversion signal which are output to the at least two source driving circuits, respectively, so that voltages of source signals driven by the at least two source driving circuits have opposite polarities with each other; wherein a phase of the first polarity inversion signal is different from that of the second polarity inversion signal.
    Type: Application
    Filed: August 8, 2013
    Publication date: February 13, 2014
    Applicant: BOE Technology Group Co., Ltd.
    Inventors: Jiyang Shao, Chulgyu Jung, Shou Li
  • Patent number: 8648787
    Abstract: A pixel circuitry for a display apparatus is provided herein. The pixel circuitry includes a first storage element, and a switching element composed of a plurality of switches. The first storage element has a first terminal receiving a pixel signal and a second terminal coupled to a first voltage. The first storage element is used for storing the pixel signal. The switching element includes a first switch and a second switch respectively conducted in response to a first signal and a second signal. Each of the first switch and the second switch has an input terminal coupled to a data line and an output terminal coupled to the first storage element. The cooperation of the first switch and the second switch has benefit of delivering the pixel signal without influence of body effect.
    Type: Grant
    Filed: February 16, 2009
    Date of Patent: February 11, 2014
    Assignee: Himax Display, Inc.
    Inventors: Cheng-Chi Yen, Ju-Tien Cheng
  • Publication number: 20140035800
    Abstract: Disclosed are a segmented parallax barrier based display apparatus with 2D/3D mode switching and a method thereof. The parallax barrier based display apparatus may include a first panel reproducing an image; and a second panel positioned on a front surface of the first panel and including a first liquid crystal for forming a parallax barrier that blocks a part of the image reproduced by the first panel and a second liquid crystal for switching polarization of light that transmits the first liquid crystal.
    Type: Application
    Filed: August 5, 2013
    Publication date: February 6, 2014
    Applicants: CNO Co., Ltd., Electronics and Telecommunications Research Institute
    Inventors: Hyun LEE, Eung Don LEE, Young Heuk CHO
  • Patent number: 8643580
    Abstract: A method for driving a liquid crystal display device includes the steps of supplying a first image signal used to apply a positive voltage to liquid crystal to pixels via a first and second data lines during a first period; deselecting the pixels with scan lines to supply a second image signal used to apply a negative voltage to liquid crystal which is to be supplied to the pixels in the first row to first data lines and supply the second image signal used to apply a negative voltage to the liquid crystal which is to be supplied to the pixels in the (n+1)-th row to second data lines during a second period; and supplying the second image signal used to apply a negative voltage to the liquid crystal to the pixels via the first and second data lines during a third period.
    Type: Grant
    Filed: August 19, 2011
    Date of Patent: February 4, 2014
    Assignee: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Yoshiyuki Kurokawa, Takayuki Ikeda
  • 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
  • Publication number: 20140028646
    Abstract: A display device including a display panel and repeating a scanning period during which the display panel is scanned and a pause period during which the display panel is not scanned. A scanning period and a pause period are set successively to a preceding frame out of two consecutive frames. A pause period is set to an entire period of a subsequent frame out of the two consecutive frames.
    Type: Application
    Filed: April 3, 2012
    Publication date: January 30, 2014
    Applicant: SHARP KABUSHIKI KAISHA
    Inventors: Kohji Saitoh, Asahi Yamato, Masami Ozaki, Toshihiro Yanagi, Masakazu Wada
  • Publication number: 20140028645
    Abstract: A liquid crystal display device includes a plurality of pixels each including a transistor and a liquid crystal element, and a driver circuit that inputs at least a video signal and a reset signal to the plurality of pixels. The driver circuit makes the polarity of the video signal inverted every m frames (m is a natural number of 2 or more) and inputs the inverted video signal to the pixel, and inputs the reset signal to the pixel while not inputting the video signal.
    Type: Application
    Filed: July 25, 2013
    Publication date: January 30, 2014
    Applicant: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Shunpei Yamazaki, Jun Koyama, Yoshiharu Hirakata, Hiroyuki Miyake
  • Patent number: 8633884
    Abstract: A liquid crystal display having specific dispositions of pixels of a liquid crystal display so as to prevent the coupling defect and the stripe defect in high speed driving. The liquid crystal display includes a plurality of pixels arranged in a matrix shape, a switching element connected to each pixel, data lines and gate lines connected to the switching elements, and a data driver generating data voltages and applying the data voltages to the data lines. The data lines are disposed at both sides of the pixels in pairs, and data voltages of the same magnitude with different polarities are applied to the pairs of data lines. In this manner, preventing the coupling defect and the stripe defect, high speed driving can be performed.
    Type: Grant
    Filed: November 16, 2006
    Date of Patent: January 21, 2014
    Assignee: Samsung Display Co., Ltd.
    Inventors: Seung-Soo Baek, Dong-Gyu Kim, Back-Won Lee
  • Patent number: 8633885
    Abstract: A display panel driving apparatus supplies pixel driving potentials corresponding to pixel data to the source lines of a display panel. The pixels are located at the intersections of the source lines and a set of scanning lines. For each pixel, the driving potentials are alternately positive and negative with respect to a common reference potential supplied to the display panel. While the display driving apparatus is latching the pixel data for the pixels on each scanning line, the output circuits of the display driving apparatus are disconnected from the source lines, allowing the source lines to return to the common reference potential, thereby avoiding unwanted current flows in the output circuits and unwanted distortion of the pixel driving waveforms.
    Type: Grant
    Filed: November 16, 2009
    Date of Patent: January 21, 2014
    Assignee: Oki Semiconductor Co., Ltd.
    Inventor: Akira Nakayama
  • Patent number: 8633886
    Abstract: A display is disclosed having crossover connections effecting polarity inversion. The display includes a panel comprising a subpixel repeating group having an even number of repeating subpixels in a first direction. The display also includes a driver circuit coupled to the panel to provide image data signals effecting polarity inversion to the panel. The display also includes a plurality of crossover connections from the driver circuit to the columns of the panel such that polarities of same color subpixels in the first direction alternate at a spatial frequency sufficient to abate undesirable visual effects on the panel when an image is displayed thereon; each crossover connection applying the same polarity to each subpixel in the column.
    Type: Grant
    Filed: September 14, 2011
    Date of Patent: January 21, 2014
    Assignee: Samsung Display Co., Ltd.
    Inventors: Thomas Lloyd Credelle, Matthew Osborne Schlegel
  • Patent number: 8633974
    Abstract: An image display device includes an image display panel including a plurality of pixels configured to display a 2D image or a 3D image, a driving circuit configured to apply a data voltage in a 2D image format or a data voltage in a 3D image format to the image display panel, a controller configured to control the driving circuit in a 2D mode for displaying the 2D image or in a 3D mode for displaying the 3D image, and a patterned retarder configured to convert light from the image display panel to alternately have a first polarization and a second polarization, wherein each pixel includes first to fourth subpixels, and the data voltage in the 2D image format is applied to the first to third subpixels and a luminance compensation voltage is applied to the fourth subpixel in the 2D mode, while the data voltage in the 3D image format is applied to the first to third subpixels and a dark gray voltage is applied to the fourth subpixel in the 3D mode.
    Type: Grant
    Filed: May 14, 2010
    Date of Patent: January 21, 2014
    Assignee: LG Display Co., Ltd.
    Inventor: Hoon Kang
  • Patent number: 8629824
    Abstract: A liquid crystal display device is disclosed, which can reduce a unit cost and prevent deterioration of picture quality caused by unfilled pixel cells, the liquid crystal display device comprising a liquid crystal panel including a plurality of pixel cells formed at every regions defined by ‘n’ gate lines and ‘m’ data lines, three colors alternatively arranged along the data line direction, and the same colors arranged along the gate line direction; a gate built-in circuit, built-in the liquid crystal panel, for supplying gate-on voltages to the gate lines; and a driving integrated circuit, formed in the liquid crystal panel, for driving the gate built-in circuit, inverting a polarity of video signal in the unit of each data line and at least three gate lines, and supplying the video signal having the inverted polarity to the data lines.
    Type: Grant
    Filed: December 26, 2007
    Date of Patent: January 14, 2014
    Assignee: LG Display Co., Ltd.
    Inventor: Chang Keun Park
  • Patent number: 8629826
    Abstract: The present invention discloses a method for driving thin film transistor liquid crystal display (TFT-LCD) and the storage medium for storing computer program representative of the method thereof. The method utilizes a timing controller to send polarity control signals to a plurality of source drivers in a TFT-LCD panel for changing the polarity distribution of the liquid crystal molecules in the panel. The method is characterized by dynamically changing the positions of polarity inversion for alleviating the problem of undercharging under high resolution and high frequency conditions; utilizing both polar and reverse polar driving signals for solving the problem of color shift in “checker board” checking signals; and providing a mechanism for mending the problem of undercharging of the first horizontal line.
    Type: Grant
    Filed: April 8, 2010
    Date of Patent: January 14, 2014
    Assignee: Chunghwa Picture Tubes, Ltd.
    Inventors: Mu-Shan Liao, Yuan-Jing Chang, Hung-Chun Li
  • Patent number: 8629825
    Abstract: A liquid crystal display device and a method of driving the same are provided. The liquid crystal display device includes a first coupling capacitor and a second coupling capacitor, which are coupled to corresponding data lines among a plurality of data lines and are coupled to a first auxiliary data line and a second auxiliary data line, respectively. Using a plurality of the first and second coupling capacitors, the liquid crystal display device can be driven by a dot inversion driving method with reduced power consumption as a result of using a low data signal voltage.
    Type: Grant
    Filed: December 11, 2008
    Date of Patent: January 14, 2014
    Assignee: Samsung Display Co., Ltd.
    Inventor: Jin-Woo Park
  • Patent number: 8629858
    Abstract: A liquid crystal device includes a first substrate, a second substrate, liquid crystal which is in between the first and the second substrate, and a detection electrode provided on a side of the first substrate, opposite to a side of the liquid crystal. The second substrate includes pixel electrodes connected through switching elements to signal lines, opposite electrodes formed between the pixel electrodes and the liquid crystal and are connected to control lines, a selection circuit that conducts the switching element during a selection period and interrupts conduction after the selection period has elapsed, a signal supplying circuit which supplies a data electric potential during the selection periods, a electric potential control circuit which sets the control lines to an predetermined electric potential when the scanning lines to the control line is selected and sets to a reference electric potential after the selection period has elapsed.
    Type: Grant
    Filed: February 15, 2008
    Date of Patent: January 14, 2014
    Assignee: Japan Display West Inc.
    Inventors: Takeshi Koshihara, Sumio Utsunomiya
  • Patent number: 8624815
    Abstract: An LCD device being stably driven is disclosed. The LCD device includes: gate lines and data lines crossing each other; a gate driver applying gate scan signals to the gate lines; and a data driver applying pixel data voltages to the data lines. The data driver includes a multiplexer which includes first and second switches that allow a power supply terminal and a ground terminal to be alternatively connected.
    Type: Grant
    Filed: November 4, 2008
    Date of Patent: January 7, 2014
    Assignee: LG. Display Co. Ltd.
    Inventor: Sung Jin So
  • Patent number: 8624814
    Abstract: A liquid crystal display (“LCD”) includes a liquid crystal panel having gate lines, data lines and pixels. The pixels are grouped into pixel lines. The LCD further includes a data driver which performs line-inversion driving by applying a data voltage having a positive or a negative polarity to the pixels such that the pixels in each pixel line have a same polarity. The pixel lines are grouped into first and second pixel line groups. A polarity of the pixels in each pixel line of the first pixel line group is the same as a polarity of the pixels in at least one pixel line disposed on an immediately adjacent side thereof. A polarity of the pixels in each pixel line of the second pixel line group is opposite to a polarity of both pixels in pixel lines disposed on two immediately adjacent sides thereof.
    Type: Grant
    Filed: October 14, 2009
    Date of Patent: January 7, 2014
    Assignee: Samsung Display Co., Ltd.
    Inventor: Cheol-Min Kim
  • Publication number: 20140002432
    Abstract: In this liquid crystal display device, a potential propagation line (PVID) and video signal lines SL(1) to SL(M) are connected via coupling capacitive elements Cp(1) to Cp(M), and a capacitance drive circuit (100) causes the potential of the potential propagation line (PVID) to change in the same direction in which the potential of a video signal S(m) varies during a period of nonselection. As a result, even if there is not enough time to perform a precharge operation, the potentials of video signal lines can be similarly raised or lowered without performing a precharge operation.
    Type: Application
    Filed: April 9, 2012
    Publication date: January 2, 2014
    Applicant: Sharp Kabushiki Kaisha
    Inventor: Nobuhiro Kuwabara
  • Patent number: 8619016
    Abstract: Active matrix display module (10) comprising a driving circuit with a source driver (20) and a gate driver (12). Furthermore, a display panel (11) with pixels consisting of three sub-pixels is provided. The sub-pixels are arranged in rows and columns and each sub-pixel comprises a sub-pixel selection transistor arranged at an intersection of a row and a column. The gate driver (12) is employed to select and deselect all pixels of a row of the display panel (11) and the source driver (20) is employed for providing the required voltage levels to all sub-pixels of a currently selected row, said voltage levels corresponding to the desired intensity for each color. Demultiplexer switches (21) are integrated onto the display panel (11) for demultiplexing columns of the display panel (11). The active matrix display module (10) further comprises means (18) for color shift compensation. These means (18) implement a selection order for the selection of the sub-pixels to compensate unintentional color shifts.
    Type: Grant
    Filed: December 8, 2006
    Date of Patent: December 31, 2013
    Assignee: Entropic Communications, Inc.
    Inventors: Patrick Oelhafen, Patrick Brunner
  • Patent number: 8610703
    Abstract: A liquid crystal display device is provided which is capable of realizing high-quality display screen with low power consumption. A charge equilibration control signal VCST is outputted by a control unit (for example, driving timing generating section) for charge equilibration time in accordance with a video signal. At time of change in polarities of common voltages vCOM1 and vCOM2, a charge equilibration unit causes a shorting of a circuit between common electrodes COM1 and COM2 in accordance with the charge equilibration control signal so that a charge equilibration occurs between the common electrodes COM1 and COM2. The switching section turns off common voltages vCOM1 and vCOM respectively to the common electrodes COM1 and COM2. According to the charge equilibration control signal, the connection is turned on between the common electrodes COM1 and COM2.
    Type: Grant
    Filed: January 14, 2010
    Date of Patent: December 17, 2013
    Assignee: NLT Technologies, Ltd.
    Inventor: Makoto Kouno
  • Patent number: 8605023
    Abstract: An apparatus and method for driving an LCD device is disclosed, in which an inversion method of an LCD panel is changed depending on a specific pattern of image data so as to improve picture quality of images displayed on the LCD panel. The apparatus for driving an LCD device includes an LCD panel displaying images, a polarity control signal generator comparing image data with pattern data previously stored for the unit of frame and generating a polarity control signal in accordance with the compared result, a data driver converting an inversion method in accordance with the polarity control signal and supplying the received image data to the LCD panel, a gate driver supplying scan pulses to the LCD panel, and a timing controller controlling the data driver and the gate driver.
    Type: Grant
    Filed: December 28, 2006
    Date of Patent: December 10, 2013
    Assignee: LG Display Co., Ltd.
    Inventors: Hong Sung Song, Oh Hyun Lee, Woong Ki Min, Hyuk Jin Kim
  • Patent number: 8605024
    Abstract: To keep down deterioration in picture quality caused by an AC driving method to enable image display with high quality to be achieved.
    Type: Grant
    Filed: January 3, 2007
    Date of Patent: December 10, 2013
    Assignees: Japan Display Inc., Panasonic Liquid Crystal Display Co., Ltd.
    Inventor: Yasuhiko Yamagishi
  • Patent number: 8605019
    Abstract: A display device of at least one embodiment of the present invention includes at least one correcting device for, in a case where a first data signal is to be written to a first pixel during a unique horizontal period, (i) carrying out a first gray scale correction with respect to display data corresponding to the first data signal to be written to the first pixel during the unique horizontal period, and (ii) supplying the display data to a display driver, the unique horizontal period being a first horizontal period for one of the driving signals supplied to respective storage capacitor bus lines which first horizontal period occurs a first number of horizontal periods after an initial horizontal period included in a given cyclic term for either or both of a binary level, the given cyclic term being a second cyclic term for the driving signals which second cyclic term occurs a second number of cyclic terms after a first cyclic term including a horizontal period during which the data signals start to be writte
    Type: Grant
    Filed: June 24, 2009
    Date of Patent: December 10, 2013
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Hiroto Suzuki, Fumikazu Shimoshikiryoh, Masae Kawabata, Kentarou Irie, Toshikazu Tsuchiya
  • Patent number: 8593440
    Abstract: A liquid crystal display is disclosed. The liquid crystal display includes a liquid crystal layer between an upper substrate and a lower substrate, m×n liquid crystal cells arranged in a matrix format according to a crossing structure of m/2 data lines and 2n gate lines, and thin film transistors respectively connected to the m×n liquid crystal cells; a data drive circuit supplying a data voltage to the data lines in response to a polarity control signal; a gate drive circuit sequentially supplying a gate pulse to the gate lines; and a POL logic circuit controlling the polarity control signal so that a phase of the polarity control signal varies every frame period.
    Type: Grant
    Filed: December 2, 2009
    Date of Patent: November 26, 2013
    Assignee: LG Display Co., Ltd.
    Inventors: Jinsung Bae, Woongki Min, Byungjin Choi, Donghak Lee
  • Patent number: 8593444
    Abstract: A method of driving a display panel includes generating a gate on voltage, generating first and second gate off voltages based on an external voltage in a first operating mode, and first and second gate off voltages based on the gate on voltage in a second operating mode, generating a clock signal based on the gate on voltage and the second gate off voltage and outputting a gate voltage generated based on the clock signal and the first and second gate off voltages to a gate line of the display panel.
    Type: Grant
    Filed: July 12, 2011
    Date of Patent: November 26, 2013
    Assignee: Samsung Display Co., Ltd.
    Inventors: Whee-Won Lee, Seung-Hwan Moon, Jae-Hoon Lee, Jun-Yong Song
  • Patent number: 8587620
    Abstract: The present invention provides a method for driving a liquid crystal display panel. The liquid crystal display panel has a plurality of pixels arranged in a matrix form and a plurality of data lines. The method includes generating gray level signals corresponding to the plurality of pixels according to input image data; determining whether the gray level values of the pixels in a same row corresponding to the plurality of data lines of a first color are all outside a first range; and when the gray level values of the pixels in the same row corresponding to the plurality of data lines of the first color are all outside the first range, controlling polarity of the gray level signals of the pixels in the same row corresponding to the plurality of data lines of the first color in a column inversion mode.
    Type: Grant
    Filed: December 19, 2011
    Date of Patent: November 19, 2013
    Assignee: AU Optronics Corp.
    Inventors: Hsiao-Chung Cheng, Jen-Chieh Chen, Chao-Ching Hsu
  • Patent number: 8587507
    Abstract: A driving circuit includes a pair of operational amplifiers, one producing an analog voltage output of positive polarity, the other producing an analog voltage output of negative polarity. An output switching circuit interchanges these outputs between a pair of data lines. One or both of the operational amplifiers includes a parasitic diode having one terminal connected to the output terminal of the operational amplifier and another terminal normally connected to a power supply voltage of the operational amplifier. When the output of the operational amplifier is switched, a protective switching circuit temporarily disconnects the parasitic diode from the power supply of the operational amplifier and instead connects it to a power supply line carrying a voltage high enough, or low enough, to ensure that the parasitic diode is not forward biased by the existing voltage on the data line to which the output is switched.
    Type: Grant
    Filed: June 21, 2011
    Date of Patent: November 19, 2013
    Assignee: Oki Semiconductor Co., Ltd.
    Inventors: Hideaki Hasegawa, Atsushi Hirama, Koji Higuchi
  • Patent number: 8587580
    Abstract: A pixel structure of a liquid crystal cell that is implemented in a filed sequential liquid crystal display and a method of driving the same. The liquid crystal display includes: a liquid crystal display panel including a plurality of scan lines and data lines, and a plurality of pixels connected to the scan lines and the data lines and arranged in a matrix form; a control signal generating unit for providing a control signal and a reset signal to the pixels of the liquid crystal display panel respectively; a common voltage generating unit for providing a common voltage to the respective pixels; and a boosting voltage generating unit for providing a boosting voltage to the respective pixels.
    Type: Grant
    Filed: December 13, 2010
    Date of Patent: November 19, 2013
    Assignee: Samsung Display Co., Ltd.
    Inventors: Il-Nam Kim, Won-Sang Park, Min-Woo Kim, Jae-Kyoung Kim, Dong-Hun Lim
  • Publication number: 20130300781
    Abstract: In first aspect of the invention, driving methods of gate interlaced scanning for color LCD are disclosed. This interlaced scanning involves powering odd gate lines sequentially first and then powering even gate lines sequentially, which can minimize the voltage polarity swing to reduce power consumption in source output block. In second aspect of the invention, driving methods of FSCLCD having an RGB LED backlight unit scanning with an increased LED lamp turn on time and reduced potential non-uniformity near modular light guid panel are disclosed. Novel driving methods of variabnt sub-color frame periods are also disclosed with various color sub-frames. In third aspect of the invention, a dual common electrode color LCD with a source driver IC block with lower driving voltage and lower power consumption in the display panel is disclosed, wherein each common electrode voltage has opposite voltage phase to reduce the source driving voltage.
    Type: Application
    Filed: May 29, 2013
    Publication date: November 14, 2013
    Inventor: Sang Tae Lee
  • Patent number: 8581823
    Abstract: A liquid crystal display (LCD) device and a driving method can produce reduced direct current image sticking and flicker. An LCD panel for the LCD device has liquid crystal cells having a common same color in each horizontal line and has columns of liquid crystal cells having a repeating sequence of color, a timing controller for generating a polarity control signal such that the polarity control signal is varied at intervals of one frame period, a data driving circuit supplying data voltages to the data lines in response to the polarity control signal, and a gate driving circuit supplying scan pulses to the gate lines. The liquid crystal cells include first liquid crystal cell groups supplied with data voltages having polarities inverted from polarities the previous frame period, and second liquid crystal cell groups supplied with data voltages having polarities identical to the polarities supplied in the previous frame period.
    Type: Grant
    Filed: December 18, 2008
    Date of Patent: November 12, 2013
    Assignee: LG Display Co., Ltd.
    Inventors: Woong Ki Min, Yong Gi Son, Su Hyuk Jang
  • Patent number: 8581894
    Abstract: An output circuit includes a differential amplifier circuit, an output amplifier circuit, a control circuit. The third power supply voltage is intermediate between the first and second power supply voltages. The differential amplifier circuit includes, between the first and second power supplies, a differential input stage, first and second current mirror and first and second junction circuits. The output amplifier circuit includes first and second transistors connected between the first and third power supplies. The control circuit includes a third transistor connected between the output of the second current mirror and an end of the second junction circuit and supplied with a bias signal having a voltage in accordance with the third power supply voltage.
    Type: Grant
    Filed: August 5, 2011
    Date of Patent: November 12, 2013
    Assignee: Renesas Electronics Corporation
    Inventor: Hiroshi Tsuchi
  • Patent number: 8576153
    Abstract: There is disclosed a liquid crystal display device and driving method are provided. The liquid crystal display device includes a liquid crystal display panel where pixels are defined by gate lines and data lines that are arranged in a matrix shape. A gate driver is operable to supply a gate voltage to the liquid crystal display panel. A data driver is operable to supply a data voltage to the liquid crystal display panel. The pixels are each independently operable to be driven by drive voltages, which have different polarities from each other, and include first and second liquid crystal cells which realize the same gray level.
    Type: Grant
    Filed: October 30, 2006
    Date of Patent: November 5, 2013
    Assignee: LG Display Co., Ltd.
    Inventors: Ki Bok Park, Sang Ho Choi
  • Publication number: 20130285892
    Abstract: A Liquid Crystal Display (LCD) panel includes a pixel array, a scanning line driver, a common electrode driver, and a data line driver. During a current frame, the scanning lines receive a scanning signal. The common electrode driver applies a common electrode signal to the common electrode line during a time window in which the scanning line corresponding to the common electrode line receives the scanning signal. The data line driver applies a data signal to the data lines during a time window in which the scanning line driver outputs the scanning signal. The data signals of adjacent pixel rows have opposite polarities, the common electrode signal during the current frame is opposite to the common electrode signal during a next frame, and the data signals of the pixel row in the current frame have opposite polarities of the data signals applied on the pixel row during the next frame.
    Type: Application
    Filed: June 25, 2013
    Publication date: October 31, 2013
    Inventors: Dong QIAN, Hanyu GU, Chang-ho TSENG, Meng CUI
  • Patent number: 8570265
    Abstract: A liquid crystal display includes a first gate line transmitting a first gate signal, a first data line transmitting a first data voltage, and a first pixel connected to the first gate line and the first data line and including a first subpixel and a second subpixel. The first subpixel includes a first switching element connected to the first gate line, a first liquid crystal capacitor connected to the first switching element, and a first storage capacitor having a first terminal and a second terminal. The second subpixel includes a second switching element connected to the first gate line and the first data line, a second liquid crystal capacitor connected to the second switching element, and a second storage capacitor having a first terminal and a second terminal and having a capacitance different from a capacitance of the first storage capacitor.
    Type: Grant
    Filed: October 1, 2008
    Date of Patent: October 29, 2013
    Assignee: Samsung Display Co., Ltd.
    Inventors: Kwang-Chul Jung, Mee-Hye Jung
  • Publication number: 20130271439
    Abstract: A liquid crystal display device includes a plurality of video signal lines that extends in columns in a display area, a plurality of inversion control signal line each supplied with an inversion control signal for controlling inversion, a first selector that selects one of a pair of amplifiers different in the polarity from each other to input signals corresponding to a pair of adjacent video signal lines on the basis of the inversion control signal, and a second selector that selects one of a pair of the corresponding adjacent video signal lines to input signals output from the pair of amplifiers on the basis of the inversion control signal, in which at least one of the signals to be supplied to the plurality of inversion control signal lines is a signal different from other signals.
    Type: Application
    Filed: March 27, 2013
    Publication date: October 17, 2013
    Applicant: Japan Display East Inc.
    Inventors: Keitoku KATO, Hiroyuki NITTA, Gou YAMAMOTO
  • Patent number: 8558774
    Abstract: An exemplary liquid crystal display includes a data circuit, a memory, and a timing controller. The data circuit includes a polarity generating circuit. The timing controller includes: a data analysis circuit configured for analyzing video signals stored in the memory and generates a corresponding symbol bit to each datum according to the category of each datum; and a symbol bit generating circuit configured for receiving the video data from the data analysis circuit, and keeping or altering the symbol bit of each datum according to the symbol bit of each datum outputted from the data analysis circuit. The data circuit is configured for receiving the video data having symbol bits from the timing controller. The polarity generating circuit is configured for generating a corresponding polarity control signal according to each of the symbol bits of the video data. A related method for driving the liquid crystal display is also provided.
    Type: Grant
    Filed: June 2, 2008
    Date of Patent: October 15, 2013
    Assignees: Innocom Technology (Shenzhen) Co., Ltd., Chimei Innolux Corporation
    Inventor: Shun-Ming Huang
  • Publication number: 20130265288
    Abstract: A liquid crystal display device is provided which includes a gate driver, a source driver, and a timing controller. The timing controller classifies an image signal and generates a gate control signal and a data control signal such that a liquid crystal panel is driven in an inversion manner corresponding to the classifying result.
    Type: Application
    Filed: April 5, 2013
    Publication date: October 10, 2013
    Applicant: Samsung Electronics Co., Ltd.
    Inventors: Sooyoung Woo, Ji Haeng Lee, Choonsik Jung
  • Patent number: 8552957
    Abstract: Methods and apparatus for switching the voltages supplied to the electrodes of pixels disposed within a liquid crystal display device. By reducing the frequency associated with an alternating voltage supplied to a first set of liquid crystal electrodes, the power required to drive the liquid crystal display device can be reduced. At the same time, a reordered schedule for updating rows of pixels in the liquid crystal display device can provide improved image quality.
    Type: Grant
    Filed: August 21, 2009
    Date of Patent: October 8, 2013
    Assignee: Apple Inc.
    Inventor: Steven Porter Hotelling
  • Patent number: 8552950
    Abstract: A liquid crystal display device with no flicker and with bright excellent display is provided. A polarity pattern of a conventional frame inversion driving is one kind of display. A polarity pattern of a conventional source line inversion driving is two kinds of display, and a disclination pattern is one kind of display. On the contrary, in a circuit structure of the present invention, polarity patterns are made to have not less than four kinds, and disclination patterns are made to have not less than two kinds. By this, bright display in which flicker is not included and poor display due to disclination is improved, can be obtained.
    Type: Grant
    Filed: September 9, 2010
    Date of Patent: October 8, 2013
    Assignee: Semiconductor Energy Laboratory Co., Ltd.
    Inventor: Yoshiharu Hirakata
  • Patent number: 8553165
    Abstract: A pixel structure includes a plurality of data lines and a common line. The common line overlaps each data line, and is coupled with each data line to respectively form a first coupling capacitor, a second coupling capacitor, a third coupling capacitor, a fourth coupling capacitor, a fifth coupling capacitor, and a sixth coupling capacitor. The third coupling capacitor is smaller than the second coupling capacitor, and the fifth coupling capacitor is smaller than the fourth coupling capacitor.
    Type: Grant
    Filed: February 14, 2011
    Date of Patent: October 8, 2013
    Assignee: AU Optronics Corp.
    Inventors: Peng-Bo Xi, Yi-Jen Chen, Shin-Hung Yeh, Ya-Ling Hsu, Wei-Kai Huang
  • Patent number: 8542228
    Abstract: In a liquid crystal display, a first data signal line and a second data signal line are provided for each pixel column. In at least one embodiment, in a case where every two pixels in the pixel column are paired, one of two pixels in each pair is connected with the first data signal line and the other of the two pixels is connected with the second data signal line, two scanning signal lines respectively connected with the two pixels are simultaneously selected during one horizontal scanning period so that signal potentials are written into the two pixels from the first data signal line and the second data signal line, respectively, during each horizontal scanning period, supply of the signal potentials to the first data signal line and the second data signal line is performed after supply of preliminary potentials to the first data signal line and the second data signal line.
    Type: Grant
    Filed: November 11, 2008
    Date of Patent: September 24, 2013
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Toshinori Sugihara, Atsushi Ban, Toshihide Tsubata
  • Patent number: 8537153
    Abstract: A source driver includes a first differential amplifier, a first output stage, a second differential amplifier, a second output stage and a multiplexer. The first differential amplifier is utilized for receiving a first differential input signal pair to generate a first differential output signal pair. The second differential amplifier is utilized for receiving a second differential input signal pair to generate a second differential output signal pair. The multiplexer couples the first differential amplifier to the first output stage and couples the second differential amplifier to the second output stage under a first configuration, and couples the first differential amplifier to the second output stage and couples the second differential amplifier to the first output stage under a second configuration.
    Type: Grant
    Filed: December 30, 2009
    Date of Patent: September 17, 2013
    Assignee: Himax Technologies Limited
    Inventor: Jia-Hao Wu
  • Patent number: 8537089
    Abstract: A display device includes a first substrate, a first electrode comprising first electrode extensions formed on the first substrate, a second electrode comprising second electrode extensions formed on the first substrate and arranged alternately with the first electrode extensions, a second substrate facing the first substrate, liquid crystal molecules interposed between the first substrate and the second substrate, wherein electrode gaps formed between the first electrode extensions and the second electrode extensions comprise first electrode gaps and second electrode gaps, and the first electrode gaps are different from the second electrode gaps, and wherein the liquid crystal molecules are aligned vertically to the first and the second substrate, when the electric field is not formed between the first and the second substrate.
    Type: Grant
    Filed: January 8, 2008
    Date of Patent: September 17, 2013
    Assignee: Samsung Display Co., Ltd.
    Inventors: Yong-hwan Shin, Sung-woon Kim, Hwa-sung Woo, Hee-seop Kim
  • Patent number: 8531371
    Abstract: A liquid crystal display includes a liquid crystal layer disposed between first and second substrates. A gate line transmits gate signals; a first data line transmits data voltages; a first voltage line alternately transmits a first voltage and a second voltage that is than greater than the first voltage; a first switching element is connected to the gate line and the first data line; a second switching element is connected to the gate line and the first voltage line; a first pixel electrode is connected to the first switching element; and a second pixel electrode is connected to the second switching element. The first pixel electrode and the second pixel electrode form a liquid crystal capacitor along with the liquid crystal layer, and at least one of the first voltage and the second voltage is variable.
    Type: Grant
    Filed: July 19, 2010
    Date of Patent: September 10, 2013
    Assignee: Samsung Display Co., Ltd.
    Inventors: Hyun-Sik Yoon, Hee-Bum Park, Seung-Soo Baek, Dong-Gyu Kim, Gwon-Heon Ryu
  • Publication number: 20130229398
    Abstract: A display apparatus includes a signal controller, a data driver, a display part, and a gate driver. The signal controller receives an image signal in accordance with a data transmission mode, receives a mode selection signal indicating the data transmission mode, and outputs one of a first inversion signal and a second inversion signal based on the indicated type. The data driver converts the image signal from the signal controller to data signals and controls a polarity of the data signals based on the output inversion signal. The display part includes a plurality of pixels to display an image. The signal controller is further configured to control the gate driver to sequentially output a plurality of gate signals to operate the pixels to receive the data signals.
    Type: Application
    Filed: June 25, 2012
    Publication date: September 5, 2013
    Inventors: Dae-Yeon Lee, Sangwon Kim, Seungyoung Lee
  • Patent number: 8525769
    Abstract: A liquid crystal display apparatus includes color filters, a display signal voltage application circuit, a common voltage application circuit, and a polarity inversion circuit. Each color filter corresponds to one of sub-pixels arranged two-dimensionally in a display section. The display signal voltage application circuit applies a display signal voltage to a pixel electrode of each of the sub-pixels. The common voltage application circuit applies a common voltage to a common electrode of each of the sub-pixels. The polarity inversion circuit inverts a polarity indicating a magnitude relationship between a pixel electrode voltage and the common voltage that is applied to the common electrode. The polarity inversion circuit makes the polarity of at least one of the sub-pixels arranged in a row of the display section different from the polarity of another sub-pixel of the same color arranged in the same row of the display section.
    Type: Grant
    Filed: April 29, 2010
    Date of Patent: September 3, 2013
    Assignee: Casio Computer Co., Ltd.
    Inventor: Takashi Miyashita
  • Patent number: 8525767
    Abstract: The present invention directs to a method for automatically compensating a common electrode voltage, comprising: calculating an average shift amount of a common electrode voltage according to gray scale data in a line on a displayed image, processing the average shift amount of the common electrode voltage to be a digital signal then converting it into an analog signal then into an average shift amount voltage waveform, and superposing it with a common electrode voltage waveform to form a new output signal waveform for driving the common electrode; the present invention also directs to a device for automatically compensating a common electrode voltage, comprising a data input module, a looking up module, a data operation module, a data encoding and converting module, a waveform generator and an operational amplification module.
    Type: Grant
    Filed: May 29, 2008
    Date of Patent: September 3, 2013
    Assignee: Beijing Boe Optoelectronics Technology Co., Ltd.
    Inventor: Xinshe Yin
  • Patent number: 8519931
    Abstract: A source driver and drive control method that cancel offset voltages and enable quality display when a vertical synchronization signal is not fed to the source driver. A source driver receives a horizontal synchronization signal of an image signal, and a binary control signal which varies in two values in synchronization with the horizontal synchronization signal and in which start values of adjacent frames of the image signal are different, excluding a vertical synchronization signal of the image signal, to apply a drive voltage to source signal lines of a display panel. In the source driver, the vertical cycle of the image signal is analyzed based on the binary control signal; a pseudo vertical synchronization signal is generated based on the vertical cycle; and a cancel operation of an offset voltage component of the drive voltage is performed based on the pseudo vertical synchronization signal.
    Type: Grant
    Filed: May 28, 2009
    Date of Patent: August 27, 2013
    Assignee: Oki Semiconductor Co., Ltd.
    Inventor: Haisong Wang
  • Patent number: 8514169
    Abstract: Charge balanced display data writing systems, apparatuses, and methods use write and hold cycles of opposite polarity during selected frame update periods. A release cycle may be provided to reduce the chance that a given display element will become stuck in an actuated state.
    Type: Grant
    Filed: October 13, 2009
    Date of Patent: August 20, 2013
    Assignee: QUALCOMM MEMS Technologies, Inc.
    Inventors: Clarence Chui, Manish Kothari