Waveform Generator Coupled To Display Elements Patents (Class 345/208)
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Patent number: 8525819Abstract: A horizontal scanning period is divided into n parts (n is a natural number), so that horizontal scanning can be performed (n×y) times in one frame period. That is, n signals can be outputted from each pixel, and storage times of the n signals are different from one another. Then, since a signal suited to the intensity of light irradiated to each pixel can be selected, information of an object can be accurately read.Type: GrantFiled: January 26, 2012Date of Patent: September 3, 2013Assignee: Semiconductor Energy Laboratory Co., Ltd.Inventor: Hajime Kimura
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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: 8525818Abstract: A display system includes a display device, a driving circuit, a flexible printed circuit (FPC), a charge pump circuit and a control circuit. The driving circuit is disposed on the display device, and utilized for driving the display device. The FPC is externally coupled to the display device. The charge pump circuit is disposed on the FPC, and utilized for generating at least an output voltage to the driving circuit. The control circuit is disposed on the display device and coupled to the driving circuit, and utilized for generating a control signal to control the charge pump circuit. The charge pump circuit has a control pin coupled to the control circuit for receiving the control signal generated from the control circuit.Type: GrantFiled: March 9, 2010Date of Patent: September 3, 2013Assignee: Himax Technologies LimitedInventors: Ssu-Chieh Yang, Yaw-Guang Chang, Hsien-Ting Huang
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Patent number: 8525768Abstract: A display panel includes a gate line circuit. The gate line circuit includes a gate driver, a control circuit and a gate line. The gate driver generates a first driving signal with alternate high and low levels. The first driving signal has a first rising edge and a first falling edge. The control circuit receives the first driving signal and generates a second driving signal. The second driving signal has a second rising edge and a second falling edge. The second rising edge and the second falling edge are respectively smoother than the first rising edge and the first falling edge. The control circuit includes at least one capacitor. The capacitor is charged in a first direction in response to the first rising edge of the first driving signal. The capacitor is charged in a second direction in response to the first falling edge of the first driving signal.Type: GrantFiled: December 28, 2009Date of Patent: September 3, 2013Assignee: Chimei Innolux CorporationInventor: Ping-Lin Liu
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Patent number: 8519940Abstract: The present invention relates to a display apparatus to synchronize a synchronous signal and an inverter driving signal in response to a display mode, and a control method thereof. A back light unit of the display apparatus makes a back light to dim based on an inverter driving signal, and a dimming frequency of the back light varies in response to a synchronous signal frequency of the image. When a synchronous signal having an abnormal frequency is inputted to the back light unit for several seconds, the back light unit holds the frequency of the inverter driving signal and the frequency of the inverter driving signal varies smoothly in response to the display mode.Type: GrantFiled: June 10, 2009Date of Patent: August 27, 2013Assignee: Samsung Display Co., Ltd.Inventors: Dong-Hyun Yeo, Jae-Hyoung Park, Byung-Kil Jeon
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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: 8519924Abstract: Aspects of the invention can provide an image display device, including a liquid crystal panel used to display an image, a light source, a light transmission unit that can make a light from the light source pass through pixels only for a predetermined length of time within a frame cycle of the image, a drive signal-generating unit that can generate a drive signal to periodically vibrate a transmissivity of each pixel of the liquid crystal panel, and a phase control unit that can control in phase the drive signal based on tone data carried by an image signal.Type: GrantFiled: September 21, 2005Date of Patent: August 27, 2013Assignee: Seiko Epson CorporationInventor: Hiroshi Hasegawa
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Publication number: 20130215160Abstract: A display apparatus includes pixels connected to gate lines and data lines crossing the gate lines, a data driver which drives the data lines, a gate driver which drives the gate lines, a timing controller which controls the data driver and the gate driver in response to an image signal and a control signal and outputs a first kickback signal and a second kickback signal, and a voltage generator which outputs a first gate-on voltage and a second gate-on voltage in response to the first and second kickback signals to drive the gate lines. The gate driver drives a first group of gate lines in response to the first gate-on voltage and drives a second group of the gate lines in response to the second gate-on voltage.Type: ApplicationFiled: July 10, 2012Publication date: August 22, 2013Applicant: SAMSUNG DISPLAY CO., LTD.Inventors: Kihyun PYUN, Sung-In KANG, Sedae KI, Seung-Woon SHIN, Hyeongseop IM, Jun-Ho HWANG
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Patent number: 8508519Abstract: An active level shift (ALS) driver circuit, a liquid crystal display device including the ALS driver circuit, and a method of driving the liquid crystal display device. A liquid crystal display device having a slim external black matrix may be provided by fabricating the ALS driver circuit using inverters and a transmission gate.Type: GrantFiled: January 4, 2011Date of Patent: August 13, 2013Assignee: Samsung Display Co., Ltd.Inventors: Seung-Kyu Lee, Dong-Hoon Lee, Chul-Ho Kim
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Patent number: 8508514Abstract: A display module includes a scan line, a data line, a driving circuit and a level converting circuit. The driving circuit has at least one first driving unit and at least one second driving unit electrically connected to the first driving unit. A non-DC signal is transmitted between the first driving unit and the second driving unit for controlling the first driving unit and/or the second driving unit. The first driving unit outputs a first driving signal to the scan line. The second driving unit outputs a second driving signal to the level converting circuit. The level converting circuit is electrically connected with the driving circuit and the data line, and outputs a display signal to the data line according to the second driving signal. A driving method of the display module is also disclosed.Type: GrantFiled: July 21, 2009Date of Patent: August 13, 2013Assignee: Pervasive Display Co., Ltd.Inventor: Wen-Jyh Sah
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Patent number: 8508562Abstract: The invention provides an image display device that has an especially satisfactory display quality for animated images, and sufficiently suppresses the irregularities of display quality among pixels. The image display device includes a light emitting drive means that drives a light emitting means, based on an analog display signal inputted to the pixels, and a light emitting control switch for controlling a light-on or light-off of the light emitting means on one end of the light emitting drive means in each pixel.Type: GrantFiled: December 19, 2011Date of Patent: August 13, 2013Assignees: Hitachi Displays, Ltd., Panasonic Liquid Crystal Display Co., Ltd.Inventors: Hajime Akimoto, Yoshirou Mikami, Kiyoshige Kinugawa, Shigeyuki Nishitani, Takeo Shiba
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Patent number: 8502764Abstract: A gate driving method for a liquid crystal display (LCD) and a gate driver thereof are provided. The LCD has a plurality of scan lines. The method starts by generating a gate driving signal. A correction signal is superposed to the gate driving signal to generate a corrected gate driving signal and to reduce a high voltage level of the gate driving signal, wherein a polarity of the correction signal is opposite to a polarity of the gate driving signal. The corrected gate driving signal is then outputted to drive one of the corresponding scan lines.Type: GrantFiled: January 31, 2011Date of Patent: August 6, 2013Assignee: AU Optronics CorporationInventors: Wen-Fa Hsu, Chien-Yu Yi
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Publication number: 20130181963Abstract: A driving apparatus applied in a liquid crystal display are disclosed. Its first channel includes a first latching module, a first level-shifting module, a P-type digital/analog converting module, a first R2R module, and a P-type amplifying module, the second channel includes a second latching module, a second level-shifting module, a N-type digital/analog converting module, a second R2R module, and a N-type amplifying module. The P-type digital/analog converting module and N-type digital/analog converting module are selectively coupled to the first R2R module or the second R2R module. The first latching module receives a first digital signal and the first latching module outputs a first analog signal corresponding to the first digital signal. The second latching module receives a second digital signal and the second latching module outputs a second analog signal corresponding to the second digital signal.Type: ApplicationFiled: January 11, 2013Publication date: July 18, 2013Applicant: Raydium Semiconductor CorporationInventor: Raydium Semiconductor Corporation
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Patent number: 8487935Abstract: There is provided a technique for smoothly performing position (movement) adjustment of a waveform marker by making switching between rough adjustment and fine adjustment in a series of marker operations possible with a single means and continuously. A display control section displays a measured waveform on the two-dimensional coordinates, which have a first axis and a second axis perpendicular to the first axis, on the display section. A waveform marker is movable by a marker operation corresponding to a direction parallel to the first axis. The display control section has a detecting section, which detects the marker operation corresponding to a direction parallel to the second axis, and changes either setting of the waveform marker or the display range of the measured waveform according to the detection result of the detecting section.Type: GrantFiled: March 31, 2010Date of Patent: July 16, 2013Assignee: Anritsu CorporationInventor: Kazunori Aoki
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Patent number: 8482551Abstract: A display system includes a display device, a driving circuit, a flexible printed circuit (FPC), a charge pump circuit and a control circuit. The driving circuit is disposed on the display device, for driving the display device. The FPC is externally coupled to the display device. The charge pump circuit is disposed on the FPC, for generating at least an output voltage to the driving circuit. The control circuit is disposed on the display device and coupled to the driving circuit, for generating a plurality of control signals to control the charge pump circuit. The charge pump circuit has a plurality of control ports coupled to the control circuit for receiving the control signals generated from the control circuit, respectively.Type: GrantFiled: January 21, 2010Date of Patent: July 9, 2013Assignee: Himax Technologies LimitedInventors: Ssu-Chieh Yang, Yaw-Guang Chang, Hsien-Ting Huang
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Publication number: 20130169608Abstract: An image processing apparatus and a method of controlling the same are provided. The image processing apparatus includes: one or more receiving units which receive a plurality of contents; a signal processing unit which outputs a first image frame by processing first content of the plurality of contents and outputs a second image frame by processing second content of the plurality of contents; an output unit which outputs a plurality of contents views by combining the first image frame and the second image frame; and a control unit which, if a sharing restriction command regarding a first contents view from among the plurality of contents views is obtained, restricts matching of a glasses apparatus with the first contents view.Type: ApplicationFiled: December 19, 2012Publication date: July 4, 2013Applicant: SAMSUNG ELECTRONICS CO., LTD.Inventor: SAMSUNG ELECTRONICS CO., LTD.
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Patent number: 8477126Abstract: In a display driver, one scanning period is divided into a period P and a subsequent period D. In the period P, a pre-charge voltage equal to an original data voltage is applied in a time-sharing manner to data lines in one block, and in the period D after the period P, the original data voltage is applied again.Type: GrantFiled: March 11, 2010Date of Patent: July 2, 2013Assignee: Renesas Electronics CorporationInventors: Yasuyuki Kudo, Akihito Akai, Goro Sakamaki
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Publication number: 20130162614Abstract: A method of operating 3D glasses having left and right shutters including receiving a synchronization signal from a display device, determining a protocol of the display device based upon the received synchronization signal, and operating the left and right shutters of the 3D glasses using the determined protocol.Type: ApplicationFiled: August 26, 2011Publication date: June 27, 2013Applicant: X6D LIMITEDInventors: Boyd MacNaughton, Rodney W. Kimmell, David W. Allen, Jure Bezgovsek, Ziga Cetrtic
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Publication number: 20130162612Abstract: An electronic device includes a first display unit for displaying static images, a second display unit for displaying dynamic images, a gate driver connected to the first display unit and the second display unit; a source driver connected to the first display unit and the second display unit; a storage unit for storing visual content; and a processor. The processor is operative to determine at least one feature of the visual content; and control the gate driver and the source driver to selectively enable at least one of the first display unit and the second display unit, based on the at least one determined feature, to display the visual content.Type: ApplicationFiled: December 17, 2012Publication date: June 27, 2013Applicant: FITIPOWER INTEGRATED TECHNOLOGY, INC.Inventor: Fitipower Integrated Technology, Inc.
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Publication number: 20130162613Abstract: To suppress an adverse effect of change in held data in a sample-and-hold circuit as a result of increase in operation speed on a generated parallel data signal. A signal converter circuit includes a first sample-and-hold circuit and a second sample-and-hold circuit each of which has a function of extracting and holding part of a serial data signal as a data in accordance with a sampling control signal and has a function of generating a data signal which is one of data signals of a parallel data signal by using the held data and outputting the data signal. The second sample-and-hold circuit includes a switch which has a function of selecting whether the potential of the data of the second sample-and-hold circuit is set to a reference potential or not in accordance with the sampling control signal of the first sample-and-hold circuit.Type: ApplicationFiled: December 17, 2012Publication date: June 27, 2013Applicant: Semiconductor Energy Laboratory Co., Ltd.Inventor: Semiconductor Energy Laboratory Co., Ltd.
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Patent number: 8471834Abstract: A display device includes: a pixel array section having pixels arranged in a form of a matrix on a display panel; a first terminal group disposed on the display panel so as to correspond to each control line of a first control line group arranged in each pixel row of the pixel array section; a first wiring group for electrically connecting each terminal of the first terminal group to each control line of the first control line group; a second terminal group disposed on the display panel for a second control line group arranged in each pixel row of the pixel array section with a plurality of control lines as a unit; and a second wiring group for electrically connecting each terminal of the second terminal group to each control line of the second control line group through parts between the terminals of the first terminal group.Type: GrantFiled: May 21, 2009Date of Patent: June 25, 2013Assignee: Sony CorporationInventors: Tetsuro Yamamoto, Katsuhide Uchino
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Patent number: 8462098Abstract: An electro-optical device is configured to be capable of using a region of a gate line drive circuit efficiently and preventing rising speed of a gate line selection signal from decreasing (rising delay), and a shift register circuit is composed of a single conductivity type transistor which is suitable for the device. The gate line drive circuit including an odd driver to drive odd rows of a plurality of gate lines, and an even driver to drive even rows thereof. Each unit shift register in the odd and even drivers receives a selection signal in the second previous row and activates its own selection signal two horizontal periods later. A start pulse of the even driver is delayed in phase by one horizontal period with respect to a start pulse of the odd driver.Type: GrantFiled: February 12, 2010Date of Patent: June 11, 2013Assignee: Mitsubishi Electric CorporationInventor: Youichi Tobita
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Patent number: 8462144Abstract: A pixel in a plurality of pixels in an LCD of a system comprises a transmissive part, a reflective part and a latched driving circuit. The driving circuit comprises a transmissive section comprising a transmissive data input coupled to the transmissive part of the pixel, and is configured to drive a transmissive data value from the transmissive data input and to set the transmissive part to a transmissive display state based on the transmissive data value; a reflective section comprising a reflective data input (independent of the transmissive data input) coupled to the reflective part of the pixel, and is configured to drive a reflective data value from the reflective data input and to set the reflective part to a reflective display state based on the reflective data value.Type: GrantFiled: July 28, 2009Date of Patent: June 11, 2013Assignee: Pixel Qi CorporationInventor: Mary Lou Jepsen
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Patent number: 8462145Abstract: A digital-to-analog converter includes a voltage-to-current converter, a current-mode digital-to-analog converter and an operational amplifier. The voltage-to-current converter generates a first current signal, and the current-mode digital-to-analog converter generates a second current signal. The operational amplifier modulates a drain current in response to the second current signal and generates an output signal having an offset.Type: GrantFiled: December 16, 2009Date of Patent: June 11, 2013Assignee: Samsung Electronics Co., Ltd.Inventors: Hyoung-Rae Kim, Yong-Joon Jeon, Gyu-Hyeong Cho, Sung-Woo Lee, Hyung-Min Lee, Yoon-Kyung Choi
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Publication number: 20130135269Abstract: This disclosure provides systems, methods and apparatus, including computer programs encoded on computer storage media, for driving electromechanical display devices that suffer from adhesion forces. In one aspect, a method for driving a display element is provided that includes applying a first series of voltages to a first electrode and applying a second series of voltages from a set of voltage levels to a second electrode to selectively place a movable layer into an actuated state or un-actuated state based on a voltage difference between the first and second electrodes. The method further includes applying a third series of voltages levels from the set of voltage levels to a third electrode. The third series of voltage levels are applied to the third electrode such that a non-zero voltage exists between the third and second electrodes during a release time period where a desired state is the un-actuated state.Type: ApplicationFiled: November 30, 2011Publication date: May 30, 2013Applicant: QUALCOMM MEMS Technologies, Inc.Inventor: William J. Cummings
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Publication number: 20130135270Abstract: A method for updating image frames displayed on a display device including charged particles is provided and includes steps as below. A first image frame is displayed according to a first image data value. A second image frame is displayed according to a second image data value. Whether an image frame switching period between the first image frame and the second image frame is less than or equal to a predetermined period is determined to decide an updating manner for the second image frame displayed on the display device. When the image frame switching period is greater than the predetermined period, a reset pulse and a second data pulse are sequentially generated such that the display device operates in a second updating mode. A display device is also disclosed herein.Type: ApplicationFiled: April 23, 2012Publication date: May 30, 2013Applicant: AU Optronics CorporationInventors: Chia-Hsien CHU, Chun-Chi Lai
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Patent number: 8451208Abstract: An organic light emitting display device is disclosed. The device has a drive circuit which generates a reference clock to be used for synchronizing data signals supplied to the pixels. The reference clock is based on the frame frequency. As a result, the display will provide images of consistent quality which do not vary with input data frequency.Type: GrantFiled: January 7, 2009Date of Patent: May 28, 2013Assignee: Samsung Display Co., Ltd.Inventors: Kyoung-Soo Lee, Wook Lee
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Patent number: 8451261Abstract: Disclosed is an LCD driver IC including: a POR (Power On Reset) circuit; and a counter, which receives a signal from the POR circuit to delay time and releases a RESETB of the POR circuit after power of a gate driver IC is stabilized.Type: GrantFiled: December 17, 2008Date of Patent: May 28, 2013Assignee: Dongbu Hitek Co., Ltd.Inventor: Jang Hyun Yoon
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Patent number: 8446402Abstract: A liquid crystal display is disclosed. The liquid crystal display includes a liquid crystal display panel on which a plurality of data lines and a plurality of gate lines are positioned to cross one another and a plurality of liquid crystal cells driven according to a voltage difference between a data voltage and a common voltage are positioned in a matrix format, a side printed circuit board (PCB) connected to the side of the liquid crystal display panel, and a DC to DC converter that is mounted on the side PCB to produce a driving voltage of the liquid crystal display panel.Type: GrantFiled: October 15, 2009Date of Patent: May 21, 2013Assignee: LG Display Co. Ltd.Inventors: Wookyu Sang, Juyoung Lee, Yunsung Yang
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Patent number: 8446399Abstract: In a two-phase driving operation that is performed in at least a sub-field having a largest luminance weight, a first ramp waveform that drops from a first potential to a second potential is applied to a plurality of first scan electrodes, a second ramp waveform that drops from a third potential that is higher than the first potential to a fourth potential that is higher than the second potential is applied to a plurality of second scan electrodes in a setup period, and a scan pulse is sequentially applied to the plurality of first scan electrodes, and then a scan pulse is sequentially applied to the plurality of second scan electrodes in a write period. The two-phase driving operation is employed to prevent a discharge failure during a write discharge.Type: GrantFiled: August 26, 2008Date of Patent: May 21, 2013Assignee: Panasonic CorporationInventors: Takahiko Origuchi, Hidehiko Shoji, Hideki Nakata
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Publication number: 20130120334Abstract: A display driving device a driving unit, an output unit, and an output control unit. The driving unit includes a first buffer and a second buffer generating a first driving voltage and a second driving voltage, respectively. The output unit includes a first output pad and a second output pad to which voltages are respectively applied via first second data driving paths, respectively, and which output the voltages to outside. The output control unit includes a charge share path that connects the first output pad and the second output pad. Each of the first data driving path and the second data driving path includes a first electro-static discharge (ESD) protection element, and the charge share path includes a second ESD protection element that is disposed separately from the first data driving path and the second data driving path.Type: ApplicationFiled: September 12, 2012Publication date: May 16, 2013Inventors: Hyung-tae KIM, Ji-woon JUNG, Jeong-ah AHN
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Publication number: 20130120333Abstract: A method of establishing a look-up table for an electrophoretic display is disclosed. The method is for establishing a plurality of driving waveforms of the electrophoretic display to the look-up table. The method includes dividing the plurality of driving waveforms to a plurality of time intervals according to a plurality of voltage values of the plurality of driving waveforms. The method also includes preparing a plurality of voltage waveform records according to the plurality of the voltage values and numbers of a unit times of the corresponding time intervals, and storing the plurality of voltage waveform records into the look-up table. Therefore, the storing capacity occupied by the look-up table of the electrophoretic display may be saved.Type: ApplicationFiled: August 29, 2012Publication date: May 16, 2013Applicant: E INK HOLDINGS INC.Inventor: CHUN TA CHIEN
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Patent number: 8432389Abstract: The present invention provides a panel, including: a plurality of pixel circuits disposed in rows and columns and each including a light emitting element for emitting light in response to driving current, a sampling transistor for sampling an image signal, a driving transistor for supplying the driving current to the light emitting element, and a storage capacitor for storing a predetermined potential; and a power supplying section configured to supply a power supply voltage of a high potential or a low potential at a time to all of the pixel circuits arranged in rows and columns; the power supplying section setting the power supply voltage to be supplied to the low potential, with which the gate-source voltage of the driving transistor becomes higher than a threshold voltage of the driving transistor, by Q times within a one-field period, Q being equal to or greater than 2.Type: GrantFiled: March 11, 2009Date of Patent: April 30, 2013Assignee: Sony CorporationInventors: Tetsuro Yamamoto, Katsuhide Uchino
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Publication number: 20130100098Abstract: A micro-projector, a control signal for a micro-projector and a method for generating the same are disclosed. The micro-projector includes a scanning module and a control module. The scanning module includes a micro reflection mirror and at least one scan axis connected to the micro reflection mirror. The control module connected to the scanning module outputs at least one scan axis control signal to the scanning module. The scan axis control signal is a periodic signal and has a waveform which includes a substantially linear portion and a non-linear portion. The proportion of the substantially linear portion to the waveform is larger than that of the non-linear portion to the waveform. In this manner, the unwanted vibration occurring in the micro reflection mirror of the micro-projector can be prevented.Type: ApplicationFiled: December 9, 2011Publication date: April 25, 2013Applicant: WALSIN LIHWA CORPORATIONInventors: Hung-Hsiang Shen, Keng-Cheng Lin
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Publication number: 20130100099Abstract: This disclosure provides systems, methods and apparatus, including computer programs encoded on computer storage media, for determining a line time for writing data to display elements on one or more common lines of an array of display elements. In one aspect, the line time is determined for writing data to a line of display elements based on the received image data to be written to the line of display elements.Type: ApplicationFiled: May 31, 2012Publication date: April 25, 2013Applicant: QUALCOMM MEMS Technologies, Inc.Inventors: Nao S. Chuei, Mark M. Todorovich, Koorosh Aflatooni, Hemang Shah
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Patent number: 8427596Abstract: The present invention relates to a TFT-LCD array substrate and a driving method thereof. The TFT-LCD array substrate comprises a substrate, on which pixel regions arranged in matrix are formed, a first pixel electrode and a first thin film transistor located in an odd column and a second pixel electrode and a second thin film transistor located in an even column are formed in each pixel region; a first gate line and a second gate line are formed in each pixel region, the first gate line is connected to gate of the first thin film transistor, and the second gate line is connected to gate of the second thin film transistor; one data line is formed in each pixel region, and the data line is connected to source of the first thin film transistor and source of the second thin film transistor, respectively.Type: GrantFiled: December 22, 2009Date of Patent: April 23, 2013Assignee: Beijing Boe Optoelectronics Technology Co., Ltd.Inventor: Zhanjie Ma
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Patent number: 8427464Abstract: Provided is a display device including a photoreception unit on an active matrix substrate in correspondence with one or two or more pixels, and a driving unit that drives the photoreception unit. The photoreception unit includes a photodiode, a capacitor that accumulates a charge in accordance with the electrical signal from when a reset signal (RST) from the driving unit has switched from the high level to the low level to when a readout signal (RWS) at the high level from the driving unit has been applied, and a switching element that, while the readout signal (RWS) is at the high level, allows output of a photoreception signal whose output level changes in accordance with the amount of accumulated charge. In a row selection period, after writing of an image signal to pixel electrodes in the row selected in the row selection period has ended, the driving unit switches the reset signal (RST) applied to the photoreception unit in the same row from the high level to the low level.Type: GrantFiled: July 1, 2009Date of Patent: April 23, 2013Assignee: Sharp Kabushiki KaishaInventors: Christopher Brown, Hiromi Katoh
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Patent number: 8427404Abstract: The method comprises, in addition to emission periods, depolarization periods during which a predetermined depolarization voltage, which exhibits a polarity opposite to the polarity opposite to the voltage applied during the emission periods, is applied and sustained at the control terminal of said driver circuits of the panel, and a reference depolarization voltage, which is different from the reference emission voltage, is applied to the reference electrodes to which reference terminals of the driver circuits are linked. This method makes it possible to use conventional and inexpensive column control means.Type: GrantFiled: December 19, 2006Date of Patent: April 23, 2013Assignee: Thomson LicensingInventors: Sylvain Thiebaud, Jean-Paul Dagois, Philippe Le Roy
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Patent number: 8421723Abstract: In a stereoscopic display apparatus having optical directory elements (21) such as lenticular elements an overdrive voltage, e.g. obtained by introducing a resonant impedance (22) in one of the switching states, enhances switching speed between the 2D and the 3D state.Type: GrantFiled: December 5, 2005Date of Patent: April 16, 2013Assignee: Koninklijke Philips Electronics N.V.Inventor: Willem L. Ijzerman
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Publication number: 20130088471Abstract: The light source device includes a first light source component, a fluorescent component, a first illuminance homogenizer, and a relay optical system. The first light source component emits laser light. The fluorescent component has a phosphor. The phosphor is excited by laser light. The first illuminance homogenizer converts the laser light into laser light showing a spatially uniform light intensity distribution. The first illuminance homogenizer is disposed between the first light source component and the fluorescent component. The relay optical system guides laser light emitted from the first illuminance homogenizer to the fluorescent component. The relay optical system is disposed between the first illuminance homogenizer and the fluorescent component.Type: ApplicationFiled: October 4, 2012Publication date: April 11, 2013Applicant: Panasonic CorporationInventor: Hiroshi Kitano
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Publication number: 20130088470Abstract: A liquid crystal display having adaptive pulse shaping control mechanism includes a first gate driver for providing a first gate signal based on a first modulation voltage, a second gate driver for providing a second gate signal based on a second modulation voltage, a first pixel array unit for illustrating image according to the first gate signal, a second pixel array unit for illustrating image according to the second gate signal, a timing controller for performing a pulse compare operation over the first and second gate signals so as to generate a first shaping control signal and a second shaping control signal, a first gate pulse modulation unit for providing the first modulation voltage according to the first shaping control signal, and a second gate pulse modulation unit for providing the second modulation voltage according to the second shaping control signal.Type: ApplicationFiled: November 23, 2011Publication date: April 11, 2013Inventors: Meng-Sheng Chang, Hsiao-Chung Cheng, Tien-chin Huang
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Patent number: 8416228Abstract: In a plasma display panel apparatus, luminance when a display state of a panel is all-black is reduced. In a first period, in which a first ramp waveform dropping from a first potential to a second potential is applied to a plurality of scan electrodes, within a setup period, a second ramp waveform dropping from a third potential to a fourth potential is applied to a plurality of sustain electrodes in a second period in the case of not all-black, and a third ramp waveform dropping from the third potential to a fifth potential is applied to the plurality of sustain electrodes in a third period which is longer than the second period in the case of all-black. In addition, a scan pulse is not applied to the plurality of scan electrodes in a write period in the case of all-black.Type: GrantFiled: August 20, 2008Date of Patent: April 9, 2013Assignee: Panasonic CorporationInventors: Hidehiko Shoji, Takahiko Origuchi
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Publication number: 20130082994Abstract: Methods and devices employing circuitry for display turn-off that offsets the effect of kickback voltage are provided. In one example, a method may include determining an amount of kickback voltage that is expected to occur in pixels of the electronic display during shutdown of the display, supplying a common voltage output to a common electrode of a pixel of the electronic display, and supplying an activation signal to the pixel to activate the pixel. The method may also include supplying a data signal to a pixel electrode of the pixel. The data signal may be substantially equal to the sum of the common voltage output and the determined kickback voltage. The method may include removing the activation signal from the pixel to store the data signal in the pixel to reduce the effect of kickback voltage on the pixel electrode of the pixel during shutdown of the electronic display.Type: ApplicationFiled: September 30, 2011Publication date: April 4, 2013Applicant: APPLE INC.Inventor: Ahmad Al-Dahle
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Publication number: 20130083086Abstract: A display device includes: a display element having memory properties; an electrostatic capacitance detection circuit; a temperature sensor detecting the temperature of the display element; and a control unit, wherein the control unit includes: a drive condition adjustment circuit configured to adjust the drive condition of the display element based on the electrostatic capacitance detected in the display state where the display element is driven under a predetermined drive condition; and a temperature compensation storage circuit storing one or more temperature compensation models indicating a correspondence relationship of the drive condition with which the display element has the optimum display characteristics across a predetermined temperature range, and the control unit changes the drive conditions of the display element at temperatures other than the temperature when the adjustment is performed based on: the temperature when the drive condition of the display element is adjusted; and the temperature coType: ApplicationFiled: July 13, 2012Publication date: April 4, 2013Applicant: FUJITSU LIMITEDInventor: Masaki NOSE
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Publication number: 20130082995Abstract: Disclosed herein are a display, a source driver of the display and a method for driving the same. The source driver includes a determining unit. The determining unit is configured to temporarily store data in response to a latch enable signal, to output a plurality of digital data values continuous in time sequence, and to sequentially convert a first digital data value and a second digital data value of the digital data values to a first analog signal and a second analog signal, respectively, and to compare the first digital data value with the second digital data value. When the first digital data value and the second digital data value are the same, the determining unit continuously outputs the first analog signal and the second analog signal.Type: ApplicationFiled: February 29, 2012Publication date: April 4, 2013Applicant: E INK HOLDINGS INC.Inventors: Chun-Wei Hsieh, Sung-Kon Kim
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Patent number: 8411006Abstract: In a display device having a plurality of scan signal line driving circuits, its display quality is improved. The display device comprises a plurality of scan signal lines, a plurality of image signal lines, and a plurality of scan signal line driving circuits for generating scan signals for driving the scan signal lines. Each of the scan signal line driving circuit internally generates a driving signal having the waveform of such potential variation that the potential decreases with a slope from a high potential to an intermediate potential between the high potential and a low potential. Each of the scan signal line driving circuits further includes a signal wiring for connecting the scan signal line driving circuits to one another and applying the driving signal.Type: GrantFiled: September 5, 2006Date of Patent: April 2, 2013Assignee: Sharp Kabushiki KaishaInventors: Toshihiro Yanagi, Kazuhiro Tani
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Publication number: 20130076714Abstract: A method for driving a display panel and a display apparatus applying the same are provided. The method includes driving all lines of the display panel in a first scanning section of a section to display one frame, and driving one of an even line and an odd line of the display panel in a second scanning section of the section to display the one frame. Accordingly, a crosstalk phenomenon in the display apparatus is removed and image quality of a 3D stereoscopic image is improved.Type: ApplicationFiled: April 6, 2012Publication date: March 28, 2013Applicant: Samsung Electronics Co., Ltd.Inventors: Sung-jin LIM, Gang-mo KOO, Sung-soo KIM, Kyu-chan LEE, Ho-seop LEE
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Publication number: 20130076713Abstract: A display apparatus includes a micro-shutter including first and second electrodes, a latch circuit including first and second input nodes, and first and second output nodes to receive an operation voltage and a common voltage, a capacitor including a first electrode and a second electrode applied with a shutter voltage, a first switching device applying a data signal to the first electrode of the capacitor in response to a gate signal, and a second switching device applying the voltage of the first electrode of the capacitor to the first input node of the latch circuit in response to an update voltage.Type: ApplicationFiled: March 30, 2012Publication date: March 28, 2013Inventors: Jung-taek Kim, Unggyu Min, Cheolwoo Park
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Patent number: 8405768Abstract: A distribution ratio Rt? of sub-frames Pt and Qt that correspond to an input frame Ft is calculated based on motion of an image in an input frame. The calculated distribution ratio Rt? is then corrected according to a distribution ratio Rt?1 between sub-frames Pt?1 and Qt?1 corresponding to an input frame Ft?1 which is to be reproduced before the input frame Ft. A distribution ratio Rt is thus acquired.Type: GrantFiled: November 18, 2009Date of Patent: March 26, 2013Assignee: Canon Kabushiki KaishaInventor: Ai Kawai
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Patent number: 8400372Abstract: In displaying a predetermined image on a plasma display panel, occurrence of an initializing bright point can be suppressed to reduce the maximum voltage in an all-cell initializing operation, light emission in the all-cell initializing operation is suppressed to reduce the black luminance, and the contrast is sharpened. In driving the plasma display panel, one field period includes a plurality of subfields having a setup period for causing initializing discharge in discharge cells, an address period, and a sustain period. One field period includes at least one subfield for applying ramp waveform voltage increasing in the setup period to the scan electrodes. The maximum voltage of the ramp waveform voltage can be varied.Type: GrantFiled: August 9, 2007Date of Patent: March 19, 2013Assignee: Panasonic CorporationInventors: Hidehiko Shoji, Takahiko Origuchi