Field Period Polarity Reversal Patents (Class 345/209)
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Patent number: 8643580Abstract: 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: GrantFiled: August 19, 2011Date of Patent: February 4, 2014Assignee: Semiconductor Energy Laboratory Co., Ltd.Inventors: Yoshiyuki Kurokawa, Takayuki Ikeda
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Publication number: 20140028645Abstract: 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: ApplicationFiled: July 25, 2013Publication date: January 30, 2014Applicant: Semiconductor Energy Laboratory Co., Ltd.Inventors: Shunpei Yamazaki, Jun Koyama, Yoshiharu Hirakata, Hiroyuki Miyake
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Publication number: 20140028646Abstract: 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: ApplicationFiled: April 3, 2012Publication date: January 30, 2014Applicant: SHARP KABUSHIKI KAISHAInventors: Kohji Saitoh, Asahi Yamato, Masami Ozaki, Toshihiro Yanagi, Masakazu Wada
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Patent number: 8633884Abstract: 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: GrantFiled: November 16, 2006Date of Patent: January 21, 2014Assignee: Samsung Display Co., Ltd.Inventors: Seung-Soo Baek, Dong-Gyu Kim, Back-Won Lee
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Patent number: 8633886Abstract: 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: GrantFiled: September 14, 2011Date of Patent: January 21, 2014Assignee: Samsung Display Co., Ltd.Inventors: Thomas Lloyd Credelle, Matthew Osborne Schlegel
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Publication number: 20140015819Abstract: Power consumption is sufficiently reduced even when a moving image is displayed at an increased driving frequency. A liquid crystal display device includes a signal generation circuit which outputs a polarity inversion signal that is generated in accordance with a count value obtained by counting cycles of a vertical synchronization signal and a source driver which switches a polarity of video signals input to a pixel in accordance with the polarity inversion signal. The polarity of the video signals is kept the same for m (m is greater than or equal to 2) or more frame periods by the polarity inversion signal.Type: ApplicationFiled: July 11, 2013Publication date: January 16, 2014Applicant: Semiconductor Energy Laboratory Co., Ltd.Inventors: Shunpei Yamazaki, Jun Koyama, Yoshiharu Hirakata, Hiroyuki Miyake
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Patent number: 8624806Abstract: A pixel circuit and an organic light-emitting diode (OLED) display using the pixel circuit is provided. The pixel circuit includes: an OLED; a third N-channel metal-oxide semiconductor (NMOS) transistor coupled to a data line and a first scan line and configured to apply a data signal to a first node; a storage capacitor having one terminal coupled to the first node and the other terminal coupled to a second node; a fourth NMOS transistor coupled between a first power and the second node and configured to apply a voltage of the first power to the second node; a first NMOS transistor having a first electrode, a second electrode, and a gate electrode coupled to the second node; and a second NMOS transistor coupled between the second node and the first electrode of the first NMOS transistor and configured to diode-connect the first NMOS transistor.Type: GrantFiled: March 2, 2010Date of Patent: January 7, 2014Assignee: Samsung Display Co, Ltd.Inventors: Bo-Yong Chung, Keum-Nam Kim
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Patent number: 8624814Abstract: 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: GrantFiled: October 14, 2009Date of Patent: January 7, 2014Assignee: Samsung Display Co., Ltd.Inventor: Cheol-Min Kim
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Publication number: 20140002432Abstract: 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: ApplicationFiled: April 9, 2012Publication date: January 2, 2014Applicant: Sharp Kabushiki KaishaInventor: Nobuhiro Kuwabara
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Patent number: 8619016Abstract: 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: GrantFiled: December 8, 2006Date of Patent: December 31, 2013Assignee: Entropic Communications, Inc.Inventors: Patrick Oelhafen, Patrick Brunner
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Patent number: 8610748Abstract: Disclosed is a method for driving an electrophoretic display device including a first electrode, a second electrode facing the first electrode, and an electrophoretic element disposed between the first electrode and the second electrode. The method includes a display driving step of inputting a first potential to the first electrode and inputting a second potential different from the first potential to the second electrode, and a reverse potential driving step of applying a voltage to the electrophoretic element, the voltage having a polarity which is opposite to a polarity of the potential in the display driving step.Type: GrantFiled: October 27, 2010Date of Patent: December 17, 2013Assignee: Seiko Epson CorporationInventors: Eiji Miyasaka, Shigeaki Seki
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Patent number: 8605067Abstract: A source-driving circuit comprises a plurality of first and second data-outputting units, a first and a second charge-sharing units and a charge-sharing switch circuit. The first and second data-outputting units have corresponding first and second output terminals respectively for outputting data signals with a first polarity and a second polarity. The first and second charge-sharing units comprise a plurality of first and second switches respectively. Each first switch is electrically connected between each two first output terminals and each two second output terminals. Each second switch is electrically connected between one of the first outputting terminals and a corresponding one of the second outputting terminals. A charge-sharing switch circuit is electrically connected to the first and second charge-sharing units for outputting a switch signal to the first and second charge-sharing units according to a polarity signal, so as to determine the on/off statuses of the first and second switches.Type: GrantFiled: December 1, 2011Date of Patent: December 10, 2013Assignee: Au Optronics Corp.Inventors: Jen-Chieh Chen, Chao-Ching Hsu, Ching-Lin Li
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Publication number: 20130321371Abstract: A light-emitting device capable of displaying an image using image signals having different polarities is provided. The light-emitting device includes a first circuit holding a first image signal having a first polarity, a second circuit holding a second image signal having a second polarity different from the first polarity and converting the second polarity of the held second image signal into the first polarity, and a light-emitting element whose luminance is sequentially determined in response to the first image signal held in the first circuit and the second image signal whose polarity is converted into the first polarity in the second circuit.Type: ApplicationFiled: May 23, 2013Publication date: December 5, 2013Applicant: Semiconductor Energy Laboratory Co., Ltd.Inventor: Jun KOYAMA
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Publication number: 20130314451Abstract: A method of driving a display panel includes receiving an input image data, based on which the display panel displays an image, outputting a first image data during N frames corresponding to a first reference time and outputting a second image data during M frames corresponding to a second reference time based on a inversion signal, where N and M are natural number, the first image data has a first polarity equal to a polarity of the input image data, and the second image data has a second polarity inverted from the polarity of the input image data, and skipping a first frame of the first image data and a first frame of the second image data based on the inversion signal.Type: ApplicationFiled: November 13, 2012Publication date: November 28, 2013Applicant: SAMSUNG DISPLAY CO., LTD.Inventors: Jong-Hee KIM, Joo-Young KIM, Joon-Chul GOH, Cheol-Gon LEE, Se-Hyoung CHO, Chong-Chul CHAI
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Patent number: 8593445Abstract: A display apparatus employs a pixel array section including pixel circuits forming a matrix, signal lines as columns, scan lines as rows and power-supply lines, and driving sections. The driving sections are a signal selector, a write scanner and a drive scanner. The signal selector provides an electric potential representing a gradation or a predetermined reference electric potential. The write scanner provides a control signal. The drive scanner provides a power-supply voltage changing the electric potential from high to low. The drive scanner drives adjacent power-supply lines as a group. The number of lines as a group is determined in advance. The drive scanner switches a power-supply voltage from high to low and vice versa, and applies the voltage to groups by shifting the phase from group to group. The voltage is supplied to a group at the same phase and switched the electric potential.Type: GrantFiled: April 30, 2009Date of Patent: November 26, 2013Assignee: Sony CorporationInventors: Tetsuro Yamamoto, Katsuhide Uchino, Naobumi Toyomura
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Patent number: 8593491Abstract: With respect to liquid crystal display inversion schemes, a large change in voltage on a data line can affect the voltages on adjacent floating data lines due to capacitive coupling between data lines. The change in voltage on these floating data lines can be increased when the application of voltage to the data line occurs after a toggling operation of the Vcom, i.e., when a voltage applied to the Vcom changes the voltage on the Vcom from one polarity to an opposite polarity. Various embodiments of the present disclosure serve to eliminate or reduce the effects of Vcom voltage toggling on data line voltages by applying a voltage (e.g., a fixed voltage) to the data lines while the voltage on Vcom toggles.Type: GrantFiled: May 24, 2011Date of Patent: November 26, 2013Assignee: Apple Inc.Inventors: Hopil Bae, Marduke Yousefpor
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Patent number: 8593444Abstract: 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: GrantFiled: July 12, 2011Date of Patent: November 26, 2013Assignee: Samsung Display Co., Ltd.Inventors: Whee-Won Lee, Seung-Hwan Moon, Jae-Hoon Lee, Jun-Yong Song
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Patent number: 8587620Abstract: 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: GrantFiled: December 19, 2011Date of Patent: November 19, 2013Assignee: AU Optronics Corp.Inventors: Hsiao-Chung Cheng, Jen-Chieh Chen, Chao-Ching Hsu
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Patent number: 8587507Abstract: 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: GrantFiled: June 21, 2011Date of Patent: November 19, 2013Assignee: Oki Semiconductor Co., Ltd.Inventors: Hideaki Hasegawa, Atsushi Hirama, Koji Higuchi
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Publication number: 20130300781Abstract: 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: ApplicationFiled: May 29, 2013Publication date: November 14, 2013Inventor: Sang Tae Lee
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Patent number: 8581894Abstract: 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: GrantFiled: August 5, 2011Date of Patent: November 12, 2013Assignee: Renesas Electronics CorporationInventor: Hiroshi Tsuchi
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Publication number: 20130285994Abstract: A liquid crystal display device includes: a display control unit configured to cause the liquid crystal panel to display a right eye image and a left eye image in an alternating manner; and a polarity control unit configured to cause the polarity of the drive voltage for the liquid crystal panel to be reversed. The polarity control unit causes the polarity of the drive voltage to be reversed such that, in one cycle including a number of display frames for right and left eye images, the number being a multiple of 8, the combination of polarities for image display in one pair of display frames composed of right and left eye images is one of four combinations and a number of occurrences of each of the four combinations is equal.Type: ApplicationFiled: January 5, 2012Publication date: October 31, 2013Applicant: SHARP KABUSHIKI KAISHAInventor: Yusuke Masuda
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Patent number: 8570311Abstract: The general field of the invention is that of display devices including a liquid-crystal matrix screen composed of elementary pixels, said screen including at least a first electrode used as voltage reference and called the “backplane,” a second electrode in the form of a matrix electronic network delivering the drive voltages for controlling the pixels and control electronics for said electrodes, said screen being used in the so-called “normally black” mode, that is to say that in the absence of applied voltages, the optical transmission of the pixels is substantially zero. In the device according to the invention, the “backplane” drive voltage is a variable periodic voltage, the amplitude of variation of this voltage being sufficient so that in the absence of voltage on the second electrode, the optical transmission of the pixels is sufficient to be detected by an observer.Type: GrantFiled: August 25, 2008Date of Patent: October 29, 2013Assignee: ThalesInventors: Philippe Airault, Laurent Canal, Gérard Voisin
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Patent number: 8570314Abstract: An emissive type display device includes: a pixel array section having pixels ready for an active matrix driving system; a circuit for setting a peak luminance level of each display frame; and a driving circuit for variably controlling a total application period length of a driving voltage applied to a power supply line connected to each pixel and amplitude of the driving voltage so as to obtain a set peak luminance level, when the set peak luminance level is lower than a set value, the driving circuit dividing the driving voltage into a plurality of times of pulse waveform, and variably controlling the amplitude of the driving voltage at each output time according to the peak luminance level such that the amplitude of the driving voltage at least one output time is lower than a maximum driving voltage in a non-emission period.Type: GrantFiled: November 18, 2009Date of Patent: October 29, 2013Assignee: Sony CorporationInventors: Hiroshi Hasegawa, Teppei Isobe
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Patent number: 8565830Abstract: A mobile terminal and a method of displaying 3D images thereon are disclosed. A display module in a mobile terminal may include a touchscreen and a controller. The touchscreen may be configured to display a plurality of icons and to receive a touch input that sets a 3D display setting for at least one of the icons. The controller may be configured to set the 3D display setting according to a pattern of the touch input. The touch pattern may determine whether the displayed 3D image of the icon is perceived to project or recede into the touch screen and/or a magnitude of a projection or recession.Type: GrantFiled: February 25, 2011Date of Patent: October 22, 2013Assignee: LG Electronics Inc.Inventors: Seonhwi Cho, Baik Han
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Publication number: 20130271439Abstract: 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: ApplicationFiled: March 27, 2013Publication date: October 17, 2013Applicant: Japan Display East Inc.Inventors: Keitoku KATO, Hiroyuki NITTA, Gou YAMAMOTO
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Publication number: 20130265288Abstract: 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: ApplicationFiled: April 5, 2013Publication date: October 10, 2013Applicant: Samsung Electronics Co., Ltd.Inventors: Sooyoung Woo, Ji Haeng Lee, Choonsik Jung
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Patent number: 8553165Abstract: 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: GrantFiled: February 14, 2011Date of Patent: October 8, 2013Assignee: AU Optronics Corp.Inventors: Peng-Bo Xi, Yi-Jen Chen, Shin-Hung Yeh, Ya-Ling Hsu, Wei-Kai Huang
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Patent number: 8552950Abstract: 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: GrantFiled: September 9, 2010Date of Patent: October 8, 2013Assignee: Semiconductor Energy Laboratory Co., Ltd.Inventor: Yoshiharu Hirakata
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Organic light emitting display for improving display quality and lifetime and driving method thereof
Patent number: 8547369Abstract: Provided is an organic light emitting display for improving the display quality and lifetime, the organic light emitting display includes a display panel comprising sub pixels disposed at intersections of data lines and first and second scan lines; a data driver alternately outputting a positive data signal and a negative data signal to the data lines; and a scan driver respectively outputting a first scan signal and a second scan signal to the first scan lines and the second scan lines.Type: GrantFiled: September 3, 2010Date of Patent: October 1, 2013Assignee: LG Display Co., Ltd.Inventors: Inhwan Kim, Juhnsuk Yoo -
Patent number: 8542225Abstract: An emission control line driver includes even-numbered stages that are connected to even-numbered emission control lines, respectively, and are driven by a first clock signal, and odd-numbered stages that are connected to odd-numbered emission control lines, respectively, and are driven by a second clock signal, wherein each of the stages includes an input unit adapted to receive a control signal and an inverted control signal output from a previous one of the even and odd numbered stages or from an external source, the input unit being adapted to control voltages of a first node and a second node, a first output unit adapted to generate an emission control signal based on the voltages of the first node and the second node, and a second output unit adapted to generate an inverted emission control signal based on the voltages of the first node and the second node.Type: GrantFiled: August 23, 2010Date of Patent: September 24, 2013Assignee: Samsung Display Co., Ltd.Inventor: Sam-Il Han
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Patent number: 8542228Abstract: 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: GrantFiled: November 11, 2008Date of Patent: September 24, 2013Assignee: Sharp Kabushiki KaishaInventors: Toshinori Sugihara, Atsushi Ban, Toshihide Tsubata
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Patent number: 8537153Abstract: 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: GrantFiled: December 30, 2009Date of Patent: September 17, 2013Assignee: Himax Technologies LimitedInventor: Jia-Hao Wu
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Publication number: 20130235010Abstract: Disclosed are a direct current converter and an organic light emitting display including the converter. The converter includes a power supply generating an input power, a first power generator receiving the input power and a selected voltage from a selector and generating a first voltage, a first output terminal connected to the first power generator and outputting the first voltage; a second power generator receiving the input power and generating a second voltage, a second output terminal connected to the second power generator and outputting the second voltage, an external feedback wiring providing a feedback voltage, a feedback terminal connected to the external feedback wiring and inputting the feedback voltage to the selector, and the selector connected to and transferring the selected voltage to the first power generator, where the selected voltage is one of the feedback voltage and the voltage output from the first output terminal.Type: ApplicationFiled: June 28, 2012Publication date: September 12, 2013Applicant: Samsung Mobile Display Co., Ltd.Inventor: Sung-Cheon Park
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Publication number: 20130229398Abstract: 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: ApplicationFiled: June 25, 2012Publication date: September 5, 2013Inventors: Dae-Yeon Lee, Sangwon Kim, Seungyoung Lee
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Patent number: 8525769Abstract: 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: GrantFiled: April 29, 2010Date of Patent: September 3, 2013Assignee: Casio Computer Co., Ltd.Inventor: Takashi Miyashita
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Patent number: 8525767Abstract: 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: GrantFiled: May 29, 2008Date of Patent: September 3, 2013Assignee: Beijing Boe Optoelectronics Technology Co., Ltd.Inventor: Xinshe Yin
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Patent number: 8519950Abstract: An input device for a user interface comprises means to monitor movement of a user by mapping and recording deformations of their skin. The input device comprises conformable/reversibly stretchable material for placement onto the skin of a user. A plurality of sensors are mounted on, or embedded in, the stretchable material and arranged to undergo, and track in-plane and out-of-plane deformations corresponding to stretching and flexure of the underlying skin. A signal for controlling another device is then generated, based on the detected movement, gesture or positioning of the user based on the detected deformations. In wearable electronics applications, the other device may be mounted on the same stretchable material. The sensors may be arranged to provide active feedback, by selectively applying vibrations or pressure to the user's skin.Type: GrantFiled: November 19, 2007Date of Patent: August 27, 2013Assignee: Nokia CorporationInventors: Zoran Radivojevic, Jarkko Tapio Saunamaki, Teuvo Tapani Ryhanen, Stephanie P. Lacour
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Patent number: 8514169Abstract: 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: GrantFiled: October 13, 2009Date of Patent: August 20, 2013Assignee: QUALCOMM MEMS Technologies, Inc.Inventors: Clarence Chui, Manish Kothari
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Patent number: 8514215Abstract: Dynamically managing power consumption of a computer, the computer including two or more graphics adapters, the computer having a number of graphics adapter configurations including one or more of the graphics adapters, where managing power consumption includes: monitoring, by a graphics driver, operation of a current graphics adapter configuration, the operation characterized by a graphics processing load; determining, in dependence upon the graphics processing load, whether operation of the current graphics adapter configuration conforms to predefined graphics processing criteria; if operation conforms, processing graphics, by the graphics adapter, for display with the one or more graphics adapters of the current graphics adapter configuration; and if operation does not conform, processing graphics, by the graphics adapter, for display with the one or more graphics adapters of another graphics adapter configuration.Type: GrantFiled: November 12, 2008Date of Patent: August 20, 2013Assignee: International Business Machines CorporationInventors: Moises Cases, Bhyrav M. Mutnury, William G. Pagan
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Patent number: 8508522Abstract: Methods for producing a remote current for driving a load, include one of sourcing and sinking a local current, Iref, through a distributed impedance line, at a first node thereof; the other of sourcing and sinking a remote current, Iref, through the distributed impedance line in response to the local current Iref; determining a rate change of voltage of the first node; and sourcing or sinking additional current, into or out of the first node, in response to the rate of change of voltage of the first node in order to settle the voltage on the distributed impedance line, and apparatus for providing such are disclosed.Type: GrantFiled: September 9, 2008Date of Patent: August 13, 2013Assignee: Rochester Institute of TechnologyInventors: Robert J. Bowman, Chris J. Nassar
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Patent number: 8493371Abstract: A portable computer system that comprises dynamically adjustable brightness range settings and brightness control for providing improved user readability and prolonged component lifetime of the display screen. The main processor can change the range settings based on ambient light conditions or the user can perform the changes. The brightness level of the display changes according to a user selected setting within the range selected. The time required to implement the brightness change can be set to a value which can be configured by the user.Type: GrantFiled: April 23, 2009Date of Patent: July 23, 2013Assignee: Palm, Inc.Inventor: Shawn R. Gettemy
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Patent number: 8493370Abstract: A portable computer system that comprises adjustable brightness settings and brightness control for providing improved user readability and prolonged life of the display screen is disclosed. The main processor can change the brightness range settings in response to a change in ambient light conditions. The user can also control the brightness of the display. The time required to implement a brightness change can be set to a value which can be configured by the user.Type: GrantFiled: July 24, 2007Date of Patent: July 23, 2013Assignee: Palm, Inc.Inventor: Shawn R. Gettemy
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Patent number: 8487857Abstract: A liquid crystal display (LCD) device includes a data drive circuit that inverts polarities of data every 2k horizontal periods (k is an integer not less than 2); and an LCD panel including a plurality of data lines and a plurality of gate lines crossing each other to define a plurality of pixels, each pixel including a switching device, wherein source electrodes of the switching devices in the pixels arranged in a vertical direction are connected to two different data lines.Type: GrantFiled: December 8, 2006Date of Patent: July 16, 2013Assignee: LG Display Co., Ltd.Inventors: Binn Kim, Nam Wook Cho, Sung Hak Jo
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Patent number: 8487902Abstract: An image input device is provided with: a display unit for displaying an image, the display unit including a transparent flat plate; an image sensing unit for sensing an image on a contact surface of a document placed on the flat plate, the contact surface being in contact with the display unit; a contact sensing unit for sensing a contact of the document with the flat plate; and a display control unit for controlling to display an image in an even and specific color when the contact of the document has been sensed by the contact sensing unit.Type: GrantFiled: August 29, 2008Date of Patent: July 16, 2013Assignee: Sharp Kabushiki KaishaInventor: Kazuyuki Nako
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Publication number: 20130176348Abstract: A liquid crystal display (LCD) and an operating method thereof are provided. The operating method includes the following steps. It is determined whether a first frame and a second frame following the first frame are dynamic frames. When the first frame and the second frame are dynamic frames, a timing controller of the LCD performs a polarity inversion on a polarity signal, so that the polarity signal corresponding to the first frame is the same as the polarity signal corresponding to the second frame. When the second frame is written into an LCD panel of the LCD, energy written into the LCD panel is reduced.Type: ApplicationFiled: January 9, 2012Publication date: July 11, 2013Applicant: HIMAX TECHNOLOGIES LIMITEDInventors: Cheng-Che Tsai, Yu-Chu Yang, Pu-Jen Cheng
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Patent number: 8482503Abstract: A liquid crystal display and a method of driving the same are disclosed. The liquid crystal display includes a liquid crystal display panel including data lines and gate lines crossing each other and liquid crystal cells, a timing control signal generating unit, a data drive circuit supplying a data voltage to the data lines, and a gate drive circuit. The timing control signal generating unit generates a first gate timing control signal for controlling a scan direction of the liquid crystal display panel in a sequential direction and a second gate timing control signal for controlling the scan direction in a reverse sequential direction. The gate drive circuit supplies a gate pulse to the gate lines while a shift direction of the gate pulse changes in response to the first and second gate timing control signals.Type: GrantFiled: November 19, 2008Date of Patent: July 9, 2013Assignee: LG Display Co., Ltd.Inventors: Hongsung Song, Woongki Min, Yonggi Son, Suhyuk Jang
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Publication number: 20130169609Abstract: Disclosed are a shift register, and a gate driving circuit including a plurality of shift registers connected in sequence to respectively supply scan signals to a plurality of gate lines of a display device. Each shift register includes: an input unit which outputs a directional input signal having a gate high or low voltage based on an output signal from a previous or subsequent shift register to a first node; an inverter unit which is connected to the first node, generates an inverting signal to a signal at the first node, and outputs the inverting signal to a second node; and an output unit which includes a pull-up unit connected to the first node and activating an output clock signal based on the signal at the first node, and a pull-down unit activating and outputting a pull-down output signal based on a signal at the second node.Type: ApplicationFiled: December 17, 2012Publication date: July 4, 2013Applicant: HYDIS TECHNOLOGIES CO., LTD.Inventor: Hydis Technologies Co., Ltd.
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Patent number: 8477127Abstract: A liquid crystal display device includes a display portion having a first substrate, a second substrate opposing to the first substrate, a liquid crystal layer held between the first and second substrates, and a plurality of pixels arranged in a delta shape. A plurality of pixel electrodes are respectively connected to signal lines extending in a first direction via a switch. The switch is controlled by scanning lines extending in a second direction which orthogonally crosses the first direction. The signal lines extend in a space between the pixel electrodes in a meandering shape in the second direction, and two kinds of color pixels are connected with a common signal line in turn via the pixel switch.Type: GrantFiled: April 30, 2010Date of Patent: July 2, 2013Assignee: Japan Display Central Inc.Inventors: Yukio Tanaka, Tetsuo Fukami, Emi Higano, Shigesumi Araki, Ken Shiiba
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Patent number: 8477128Abstract: A driving circuit and a liquid crystal display using the same. In the driving circuit, a first switch and a second switch are provided in a VCOM driver thereof. The first switch is designed to be turned on to a ground a VCOM terminal of a display capacitor, and the second switch is designed to be turned on to couple a constant voltage level DC VCOM to the VCOM terminal of the display capacitor. In addition, a timing controller of the driving circuit is designed for reducing power consumption, which controls the statuses of the first and second switches and determines when to allow a positive polarity voltage to be coupled to the display capacitor to charge the display capacitor for positive polarity display.Type: GrantFiled: October 27, 2010Date of Patent: July 2, 2013Assignee: Himax Technologies LimitedInventors: Wen-Lin Yang, Chih-Lung Kuo