Field Emissive (e.g., Fed, Spindt, Microtip, Etc.) Patents (Class 345/75.2)
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Patent number: 11907626Abstract: A method, a device, and an electronic apparatus are provided. When a user performs the design operation in a display panel design program, the method includes steps of collecting display panel design parameters corresponding to a design operation of the user in the display panel design program obtaining a design strategy preset in the display panel; checking if the display panel design parameters are normal based upon the design strategy of the display panel; and alerting in the display panel design program when the display panel design parameters are abnormal.Type: GrantFiled: May 13, 2020Date of Patent: February 20, 2024Assignee: Shenzhen China Star Optoelectronics Semiconductor Display Technology Co., Ltd.Inventors: Bo Lv, Zui Wang
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Patent number: 11880641Abstract: A pixel design method, a pixel design device, and equipment are provided. The method includes obtaining design dimension and resolution information of a display panel configured by a user; computing dimensions of a single pixel of the display panel based on the design dimension information of the display panel and design resolution information of the display panel; and drawing a pixel design diagram of the single pixel in the display panel based on the dimensions of the single pixel and the pixel design strategy information.Type: GrantFiled: July 14, 2020Date of Patent: January 23, 2024Assignee: Shenzhen China Star Optoelectronics Semiconductor Display Technology Co., Ltd.Inventor: Yang Liu
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Patent number: 11790843Abstract: The present technology relates to a signal processing apparatus, a signal processing method, and a display apparatus that may reduce the effect of deterioration in element of a display panel. Provided is a signal processing apparatus including a signal processing unit configured to acquire, in changing a video signal from a low luminance display signal to a high luminance display signal by luminance enhancement, an accumulated load increase amount obtained by measuring and accumulating amounts of increase in load on a display panel caused by luminance enhancement, and adaptively control, in reference to the accumulated load increase amount acquired, a first gain for improving luminance of the video signal, according to a degree of effect of deterioration in element of the display panel. The present technology is applicable to self-luminous display apparatuses, for example.Type: GrantFiled: April 19, 2021Date of Patent: October 17, 2023Inventors: Masao Zen, Syunsuke Kikuchi, Daisuke Miki, Kazuhiro Nukiyama, Kazutaka Kobayashi, Yasushi Konuma, Kazuki Uchida
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Patent number: 11620933Abstract: A display driver includes image processing circuitry and driver circuitry. The image processing circuitry is configured to process first image data for pixels of a display panel comprising a first region and a second region to generate output voltage data. The first region and the second region have different pixel layouts. The driver circuitry is configured to update the pixels based on the output voltage data. Processing the first image data comprises IR-drop compensation based on first luminances of the pixels, each of the first luminances being determined based on the first image data and whether a corresponding pixel of the pixels is located in the first region.Type: GrantFiled: October 13, 2020Date of Patent: April 4, 2023Assignee: Synaptics IncorporatedInventors: Masao Orio, Takashi Nose, Hirobumi Furihata, Akio Sugiyama, Tomoo Minaki
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Patent number: 11501694Abstract: A display device includes: a plurality of pixels to receive data voltages based on converted grayscales; and a grayscale converter to: calculate first compensation offsets based on positions of the pixels and input grayscales for the pixels; convert the first compensation offsets into second compensation offsets according to a maximum luminance weight based on an input maximum luminance; and calculate the converted grayscales by applying the second compensation offsets to the input grayscales.Type: GrantFiled: January 25, 2021Date of Patent: November 15, 2022Assignee: Samsung Display Co., Ltd.Inventors: Si Beak Pyo, Seung Kyu Lee, Young Uk Hwang
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Patent number: 11307720Abstract: Particular embodiments described herein provide for an electronic device that can be configured to include a touchscreen that includes one or more biosensors. The touchscreen can include drive lines, sense lines, a photoconductive material, one or more biosensing areas, a touchscreen engine, and a biosensor engine. In a touchscreen mode, the touchscreen engine can be configured to couple with the sense lines and determine a place on the touchscreen where a user touched. In a biosensing mode, the biosensor engine can be configured to use the drive lines or sense lines and determine biometrics of the user.Type: GrantFiled: December 28, 2019Date of Patent: April 19, 2022Assignee: Intel CorporationInventor: Sean Jude William Lawrence
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Patent number: 11289026Abstract: The present disclosure provides a pixel circuit, including: a pixel driving circuit coupled to a gate line and a data line and configured to generate a driving current based on a data signal provided by the data line in response to a gate driving signal provided by the gate line and output the driving current through a current output terminal; and a shunt circuit coupled to the gate line and a first control signal line, and configured to control connection/disconnection between a first signal input terminal and a first signal output terminal in response to the gate driving signal and a first control signal provided by the first control signal line. The current output terminal is coupled to a first terminal of a light emitting device and the first signal input terminal, and the first signal output terminal is coupled to a to-be-charged pixel circuit.Type: GrantFiled: June 8, 2020Date of Patent: March 29, 2022Assignee: BOE TECHNOLOGY GROUP CO., LTD.Inventors: Ming Yang, Can Zhang, Shengji Yang, Weihai Wang, Minghua Xuan, Xiaochuan Chen
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Patent number: 11211586Abstract: A flexible display device includes a base substrate, a display panel disposed on the base substrate, and a first protective film disposed on one surface of the base substrate. The display panel includes a plurality of pixels and a plurality of signal lines connected to the plurality of pixels. The first protective film has one or more vacuum holes.Type: GrantFiled: December 5, 2019Date of Patent: December 28, 2021Assignee: SAMSUNG DISPLAY CO., LTD.Inventor: Taean Seo
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Patent number: 11205376Abstract: A display compensation method for a display panel, a display compensation device, a display device and a storage medium. The display compensation method includes: acquiring compensation data of i pixels adjacent to the target pixel of the display panel respectively; deleting deviation data from the compensation data of i pixels; calculating the compensation data of the target pixel according to the remaining compensation data; i is an integer greater than 2.Type: GrantFiled: March 6, 2019Date of Patent: December 21, 2021Assignee: BOE TECHNOLOGY GROUP CO., LTD.Inventors: Mingi Chu, Lirong Wang
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Patent number: 11132084Abstract: The present disclosure generally relates to the field of display technologies and, more particularly, to a touch circuit, a touch detection method, a display panel, and a display device. The touch circuit includes a touch electrode, a touch signal line, and a driving transistor. The driving transistor has a control terminal coupled to the touch electrode, a first terminal receiving a first power signal, and a second terminal coupled to the touch signal line, and is configured to output a current signal to the touch signal line based on a voltage signal of the touch electrode.Type: GrantFiled: May 22, 2019Date of Patent: September 28, 2021Assignees: Chengdu BOE Optoelectronics Technology Co., Ltd., BOE TECHNOLOGY GROUP CO., LTD.Inventor: Aojun Bai
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Patent number: 10916170Abstract: The present disclosure provides a gate driving circuit and a driving method thereof as well as a display device. The gate driving circuit comprises a driving circuit connected to a gate line for outputting a gate scanning signal; and a detecting circuit connected to the gate line for collecting and recording the gate scanning signal.Type: GrantFiled: June 17, 2019Date of Patent: February 9, 2021Assignees: HEFEI XINSHENG OPTOELECTRONICS TECHNOLOGY CO., LTD., BOE TECHNOLOGY GROUP CO., LTD.Inventors: Meng Li, Yongqian Li, Zhidong Yuan, Can Yuan
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Patent number: 10775420Abstract: A system includes at least one electric field sensor and at least one magnetic field sensor, wherein the at least one electric field sensor and the at least one magnetic field sensor are formed as an integrated sensor unit with a single electrical circuit, and wherein the integrated sensor is configured to measure power of an energized cable.Type: GrantFiled: September 21, 2017Date of Patent: September 15, 2020Assignee: The United States of America as represented by the Secretary of the ArmyInventors: Sean M. Heintzelman, Simon J. Ghionea, David M. Hull
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Patent number: 10769986Abstract: The disclosure provides an OLED display device and a driving method thereof. The OLED display device includes an OLED display module, a driving module, and a system module, and the driving module includes a display driving module and a human eye recognition module; the system module generates display data based on an image, the display driving module drives the OLED display module to display according to the data, and the human eye recognition module senses a human eye's focus area and gives feedback information to the system module; when the human eye recognition module senses the human eye's focus area, information thereof is fed back to the system module, the system module determines the focus and non-focus areas according to the information, then the display driving module turns off all or part of predetermined sub-pixels in the non-focus area. The disclosure can prolong the lifetime of the OLED display device.Type: GrantFiled: October 19, 2017Date of Patent: September 8, 2020Assignee: WUHAN CHINA STAR OPTOELECTRONICS TECHNOLOGY CO., LTD.Inventor: Qingcheng Zuo
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Patent number: 10602595Abstract: An illumination level of a luminous element of a user interface for an electrical device is controlled by a processor driving the luminous element with a pulse-width-modulated (PWM) or other type of control signal that is calculated based on a) a signal corresponding to a desired time-varying illumination level of the luminous element to be perceived by a human observer and b) a nonlinear sensitivity relationship between an actual illumination level and a resulting illumination level perceived by a human eye, wherein the corresponding signal comprises an increasing sinusoidal-based ramp function and a decreasing sinusoidal-based ramp function.Type: GrantFiled: September 5, 2019Date of Patent: March 24, 2020Assignee: The Gillette Company LLCInventor: Benjamin Heinrich Niestroj
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Patent number: 10424263Abstract: Provided is a liquid crystal display device, including: a plurality of scanning connection lines formed on at least one side of edges of the image display region, the plurality of scanning connection lines connecting together a scanning signal drive circuit and a plurality of scanning signal lines; a selection circuit formed so as to be interposed between the plurality of scanning connection lines and the plurality of scanning signal lines, the selection circuit being configured to selectively short-circuit one of a plurality of the scanning signal lines to one of the plurality of scanning connection lines based on a selection signal; and a selection signal line connected to the selection circuit, the selection signal line transmitting the selection signal to the selection circuit.Type: GrantFiled: October 30, 2018Date of Patent: September 24, 2019Assignee: Panasonic Liquid Crystal Display Co., Ltd.Inventors: Genshiro Kawachi, Kazuo Kita
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Patent number: 10403198Abstract: A display apparatus includes a plurality of pixels, and a plurality of scan lines, a plurality of data lines, and a plurality of light emission lines connected to the pixels. Scan signals are applied to the pixels through the scan lines, each of the scan signals has a first level and a second level higher than the first level, an amplitude of each of the scan signals is a difference between the first level and the second level, and the amplitude of a scan signal applied to an (h+1)th scan line is larger than the amplitude of a scan signal applied to an hth scan line.Type: GrantFiled: May 30, 2017Date of Patent: September 3, 2019Assignee: Samsung Display Co., Ltd.Inventors: Taejin Kim, Hae-kwan Seo, Ahyoung Son
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Patent number: 10049715Abstract: A semiconductor storage device includes a memory cell, a switch, a source driver, a drain driver, a voltage measurement circuit and a control electrode driver. The memory cell has a control electrode, a floating electrode, a source and a drain. In a writing to the memory cell, the voltage measurement circuit measures a voltage generated between the control electrode and the source when the switch is in an on state connecting the control electrode and the drain and a predetermined current flows from the current source to the memory cell, and the control electrode driver applies to the control electrode a voltage that is controlled based on the voltage measured by the voltage measurement circuit.Type: GrantFiled: August 1, 2016Date of Patent: August 14, 2018Assignee: DENSO CORPORATIONInventor: Yoshihide Kai
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Patent number: 10042495Abstract: A touch display panel, a manufacturing method and a driving method thereof and a touch display device are provided. The touch display panel includes an array substrate, a plurality of subpixels and a driver chip for outputting a signal to cathode layers in each subpixel group. Each subpixel includes an anode layer, a light-emitting layer and a cathode layer; one subpixel group is formed by at least two adjacent subpixels and cathode layers of the subpixels in a same subpixel group are connected. The driver chip is electrically connected with a cathode layer of at least one subpixel in the subpixel group through a conductive wire, and configured to output a common voltage signal to cathode layers in each subpixel group in a display period of one frame and to output a touch drive signal to the cathode layers in each subpixel group in a touch period of one frame.Type: GrantFiled: July 22, 2016Date of Patent: August 7, 2018Assignees: BOE TECHNOLOGY GROUP CO., LTD, BEIJING BOE OPTOELECTRONICS TECHNOLOGY CO., LTDInventors: Ming Yang, Xue Dong, Xiaochuan Chen, Haisheng Wang, Yingming Liu, Yanchen Li
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Patent number: 9898970Abstract: A display device includes a data driver configured to generate a data signal based on a data voltage; a display panel configured to be driven based on a first power supply voltage and the data signal; a timing controller configured to control operations of the data driver and the display panel and configured to generate a ready signal indicating a power supply timing; a first voltage regulator configured to generate the first power supply voltage based on a first input voltage and a first enable signal; a second voltage regulator configured to generate the data voltage based on the first input voltage and a second enable signal; and a power sequence controller configured to generate the first enable signal based on the ready signal and the data voltage and configured to generate the second enable signal based on the ready signal and the first power supply voltage.Type: GrantFiled: February 17, 2015Date of Patent: February 20, 2018Assignee: Samsung Display Co., Ltd.Inventors: Byeong-Doo Kang, Jong-Man Bae
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Patent number: 9881588Abstract: An imaging and display apparatus for passive displays evaluates the illumination of an input scene and incorporates data representative of such input scene within a transfer media. The transfer media may be a broadcast or transmission of image data, illumination data and gamma information that can be received by a display system, which includes a passive display illuminated by incident light, to display images while adjusting the incident light and/or gamma based on the received data to reduce energy requirements, to increase contrast or shades of gray in the displayed image, and to optimize light source operation for color fidelity. The data may be provided as a video signal, modulated video signal, s-video signal, digital signal, or other signal that can be used by a passive display system to display images.Type: GrantFiled: August 10, 2012Date of Patent: January 30, 2018Assignee: Fergason Licensing LLCInventor: James L. Fergason
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Patent number: 9792870Abstract: Provided is a liquid crystal display device, including: a plurality of scanning connection lines formed on at least one side of edges of the image display region, the plurality of scanning connection lines connecting together a scanning signal drive circuit and a plurality of scanning signal lines; a selection circuit formed so as to be interposed between the plurality of scanning connection lines and the plurality of scanning signal lines, the selection circuit being configured to selectively short-circuit one of a plurality of the scanning signal lines to one of the plurality of scanning connection lines based on a selection signal; and a selection signal line connected to the selection circuit, the selection signal line transmitting the selection signal to the selection circuit.Type: GrantFiled: October 10, 2014Date of Patent: October 17, 2017Assignee: Panasonic Liquid Crystal Display Co., Ltd.Inventors: Genshiro Kawachi, Kazuo Kita
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Patent number: 9728127Abstract: A pixel includes a driving circuit, a first organic light emitting diode, a second organic light emitting diode, and a self-repair circuit. The driving circuit supplies current based on a data signal supplied through a data line. The first organic light emitting diode is coupled to the driving circuit through a first current path. The second OLED is coupled to the driving circuit through a second current path. The self-repair circuit interrupts the first current path and supplies the current to the second current path when the first organic light emitting diode has a defect.Type: GrantFiled: September 18, 2014Date of Patent: August 8, 2017Assignee: SAMSUNG DISPLAY CO., LTD.Inventors: Hai-Jung In, Yong-Sung Park
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Patent number: 9728114Abstract: The present invention relates to liquid crystal display manufacturing technology. There provides a display drive signal compensating method, comprising the steps of: acquiring an original drive signal of every row of input pixels in a display; determining a position of the row of input pixels, based on the original drive signal; generating a compensation signal for compensating the original drive signal, based on a transmission line internal resistance at the position of the row of input pixels; and outputting a superposed signal obtained by superposing the compensation signal on the original drive signal to the row of input pixels. This method can compensates a voltage drop of the drive signal resulted by the transmission line internal resistance and thus improves the display effect. Meanwhile, there also provide a display drive signal compensating device for carrying out the abovementioned method, and correspondingly, a display comprising such device.Type: GrantFiled: June 26, 2014Date of Patent: August 8, 2017Assignee: BOE TECHNOLOGY GROUP CO., LTD.Inventor: Tuo Sun
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Patent number: 9390666Abstract: A display device capable of driving at low speed includes a display panel, on which display lines each including a plurality of pixels are formed, a driver unit for driving the pixels, and a timing controller which controls an operation of the driver unit and includes a first control logic unit and a second control logic unit. When a mode conversion control signal of an on-level is input during a normal drive, in which a length of one frame is set to P, the first control logic unit expands a length of one frame for a low speed drive to (n×P), where n is a positive integer equal to or greater than 2, assigns a length P to each of n sub-frames included in the one frame for the low speed drive, and controls the operation of the driver unit in an interlaced low speed driving scheme.Type: GrantFiled: June 18, 2014Date of Patent: July 12, 2016Assignee: LG DISPLAY CO., LTD.Inventors: Daeseok Oh, Bogun Seo, Yonghwa Park, Moonsoo Chung
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Patent number: 9155157Abstract: An electroluminescent device (9) for emitting light (7) whose color point is able to be set variably, comprising at least two electroluminescent regions (41, 42) that, to allow the same operating voltage to be applied, are arranged to be connected in parallel electrically, wherein the electroluminescent regions (41, 42) comprise—at least one first electroluminescent region (41) of a first electroluminescent material for emitting light in a first spectral band in accordance with a first luminance vs. voltage characteristic (81), and—at least one second electroluminescent region (42) of a second electroluminescent material for emitting light in a second spectral band that is not the same as the first spectral band, in accordance with a second luminance vs. voltage characteristic (82) that is not the same as the first luminance vs. voltage characteristic (81).Type: GrantFiled: August 14, 2007Date of Patent: October 6, 2015Assignee: KONINKLIJKE PHILIPS N.V.Inventors: Hans-Peter Loebl, Volker Van Elsbergen, Edward Willem Albert Young
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Patent number: 9123258Abstract: An interface apparatus (1600A) comprises a surface (1642) touchable by a finger (120). The surface has a touch-sensitive area with a predetermined position (1646), to which a function is assigned. The finger's presence at the predetermined position (1646) is detected. An electrosensory stimulus is generated to the finger by applying an alternating electrical drive to one or more electrodes (1662). Each electrode is provided with an insulator, which prevents DC flow from the electrode to the finger and a capacitive coupling over the insulator is formed between the electrode (1662) and the finger (120). The capacitive coupling and electrical drive are dimensioned to produce an electrosensory sensation, independently of mechanical vibration of the electrode. The electrosensory stimulus is varied temporally based on the detected presence or absence of the of the finger (120) near the at least one touch-sensitive area having the predetermined position (1646).Type: GrantFiled: May 19, 2009Date of Patent: September 1, 2015Assignee: Senseg Ltd.Inventors: Ville Makinen, Petro Suvanto, Jukka Linjama
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Patent number: 9013372Abstract: Disclosed herein is a display apparatus, including: a pixel array section including a plurality of pixels, a writing transistor, a driving transistor, a first switching transistor, a holding capacitor, and a second switching transistor; a first scanning section configured to drive the writing transistor in a unit of a row of the pixels; a second scanning section configured to drive the switching transistors in synchronism with scanning by the first scanning section; and a third scanning section configured to control the second switching transistors to a non-conducting state within a period after the image signal is written by the writing transistor until the signal writing period of the same row of the pixels ends but to a conducting state within any other period.Type: GrantFiled: May 8, 2012Date of Patent: April 21, 2015Assignee: Sony CorporationInventors: Yutaka Mitomi, Masatsugu Tomida, Katsuhide Uchino
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Patent number: 8963812Abstract: A method and apparatus for displaying a reflective image in response to light emitted from an emissive display is disclosed. An apparatus includes an emissive display, a processor in communication with the emissive display, and an electronic cover proximate to the emissive display. The electronic cover includes a passive display layer having a plurality of passive display elements and a photosensitive layer responsive to emitted light from the emissive display. A method includes forming an emitted light image on the emissive display and exposing the photoconductor layer of the electronic cover to an emitted light image, causing the plurality of passive display elements to form a reflective image on the passive display layer so that the reflective image corresponds to the displayed image.Type: GrantFiled: March 13, 2013Date of Patent: February 24, 2015Assignee: Xerox CorporationInventors: Nan-Xing Hu, Johann E. Junginger, Gregory McGuire, Vladislav Skorokhod
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Patent number: 8933864Abstract: A flat panel display including a plurality of electrically addressable pixels; using a passive matrix on a first substrate, a passivating layer on at least partially around the pixels; a conductive frame on the passivating layer, and a plurality of cold cathode emitters on select portions of the conductive frame within the display, wherein exciting the conductive frame and addressing one of the pixels using the associated passive matrix causes electrons to strike at least one of the pixels and result in the emission of light from those pixels. Using a metal layer (ML) on a second substrate the extent of electrons emitted is enhanced through the incorporation of a noble gas or mixture thereof, causing a multiplication of the electrons emitted by the cold cathode when the gas is ionized.Type: GrantFiled: October 20, 2008Date of Patent: January 13, 2015Assignee: CopyTele, Inc.Inventors: Frank J. DiSanto, Denis Krusos
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Patent number: 8698785Abstract: An image adjusting apparatus is provided for adjusting the color of an image. The image adjusting apparatus includes a converting module, a processing module, an output module, a display module, a measuring module and a computing module. The converting module converts an input image into an image signal. The processing module is coupled with the converting module for adjusting the image signal and generating an output signal according to a gain value. The output module is coupled with the processing module for generating an output image according to the output signal. The display module is coupled with the output module for displaying the output image. The measuring module is coupled with the display module for measuring the output image and generating a measurement. The computing module is coupled with the measuring module and the processing module for generating the gain value according to the measurement.Type: GrantFiled: February 1, 2008Date of Patent: April 15, 2014Assignee: Princeton Technology CorporationInventors: Chun-Ming Cheng, Tsung-Hsiang Huang
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Patent number: 8576258Abstract: For improving the brightness decay of a display due to its aging, a non-volatile memory such as Flash can be used to store a brightness accumulation value of each point of the display, and each point can be compensated for its brightness accordingly. However, the non-volatile memory suffers from incorrect write-in data or temporary power disconnection, and thus the error will exist all the time to make the display non-even. Hence, the present invention uses a multiple data backups and CRC error detection, plus new/old data comparison to protect data the non-volatile memory from incorrect brightness compensation value so as to uniform the brightness of the display.Type: GrantFiled: December 16, 2009Date of Patent: November 5, 2013Assignee: Holtek Semiconductor Inc.Inventors: Tzong-Kwei Chen, Chun-Lin Shen, Yi-Chen Liu, Chen-Ting Kuan
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Patent number: 8576145Abstract: A method for controlling an electroluminescent display to produce an image for display that has reduced luminance to reduce burn-in on the display while maintaining visible contrast, includes providing the electroluminescent (EL) display having a plurality of EL emitters, the luminance of the light produced by each EL emitter being responsive to a respective drive signal; receiving a respective input image signal for each EL emitter; and transforming the input image signals to a plurality of drive signals that have a reduced peak frame luminance value but maintains contrast in the displayed image to reduce burn-in by adjusting the drive signals to have reduced luminance provided by each pixel with the luminance decrease in a shadow range being less than the luminance decrease in a non-shadow range.Type: GrantFiled: November 14, 2008Date of Patent: November 5, 2013Assignee: Global OLED Technology LLCInventors: Michael E. Miller, Christopher J. White
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Patent number: 8547299Abstract: Provided is a pulse drive-type field emission device. The pulse drive-type field emission device includes anode and cathode substrates that are spaced apart from and face each other, a cathode electrode formed on the cathode substrate, and a field emitter formed on the cathode electrode. The pulse drive-type field emission device further includes a metal mesh-type gate electrode having an opening through which electrons emitted from the field emitter pass and a power source which applies a compensated pulse wave power to the gate electrode or the cathode electrode to compensate for vibration of the gate electrode. Thus, noise from the metal mesh can be prevented without additional fabrication processes by modifying a waveform in pulse driving.Type: GrantFiled: October 7, 2009Date of Patent: October 1, 2013Assignee: Electronics and Telecommunications Research InstituteInventors: Jin Woo Jeong, Yoon Ho Song
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Publication number: 20130176349Abstract: A display device and a method of driving such a display device including a display module and a DC-DC converter provided outside the display module to supply first and second power source voltages to the display module. The display module includes a gamma voltage generator for generating a plurality of gamma voltages from a first driving voltage and a second driving voltage and a driving voltage varying unit for correcting the first driving voltage and the second driving voltage based on a change in the first power source voltage.Type: ApplicationFiled: March 27, 2012Publication date: July 11, 2013Inventors: Jung-Kook Park, Jae-Yong Kim, Byung-Hoon Chae, Joong-Yong Lee, Si-Baek Pyo
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Patent number: 8390538Abstract: A field emission pixel includes a cathode on which a field emitter emitting electrons is formed, an anode on which a phosphor absorbing electrons from the field emitter is formed, and a thin film transistor (TFT) having a source connected to a current source in response to a scan signal, a gate receiving a data signal, and a drain connected to the field emitter. The field emitter is made of carbon material such as diamond, diamond like carbon, carbon nanotube or carbon nanofiber. The cathode may include multiple field emitters, and the TFT may include multiple transistors having gates to which the same signal is applied, sources to which the same signal is applied, and drains respectively connected to the field emitters. An active layer of the TFT is made of a semiconductor film such as amorphous silicon, micro-crystalline silicon, polycrystalline silicon, wide-band gap material like ZnO, or an organic semiconductor.Type: GrantFiled: September 23, 2011Date of Patent: March 5, 2013Assignee: Electronics and Telecommunications Research InstituteInventors: Yoon Ho Song, Dae Jun Kim, Jin Woo Jeong, Jin Ho Lee, Kwang Yong Kang
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Patent number: 8319709Abstract: A display device of the invention includes a display panel attached to one face side of a light transmissive circuit board and a light transmissive substrate attached to the other face side of the circuit board. A mounted component is mounted on the other face side of the circuit board. The circuit board includes a light transmissive junction layer for joining the circuit board to the light transmissive substrate at a position avoiding the mounted component. The junction layer includes a core substrate formed of a resin, an adhesive layer formed on one face of the core substrate, and a bonding layer formed on the other face of the core substrate and cured. The adhesive layer is adhered to the circuit board, and the bonding layer is firmly fixed to the light transmissive substrate.Type: GrantFiled: November 20, 2009Date of Patent: November 27, 2012Assignees: Hitachi Displays, Ltd., Panasonic Liquid Crystal Display Co., Ltd.Inventors: Hiroshi Ito, Kazunori Ojima, Hideaki Abe, Shinji Tanabe, Masayuki Yanagihara
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Patent number: 8223101Abstract: A flat panel display is disclosed. The flat panel display includes a plurality of electrically addressable pixels, a plurality of thin-film transistor driver circuits each been electrically coupled to an associated at least one of the pixels, respectively, a passivating layer on the thin-film transistor driver circuits and at least partially around the pixels, a conductive frame on the passivating layer, and a plurality of nanostructures on the conductive frame, wherein, creating a voltage difference between the pixels and the conductive frame by addressing one of the pixels using the associated driver circuit causes the nanostructures to emit electrons that induce a corresponding one of the pixels to emit light.Type: GrantFiled: October 29, 2008Date of Patent: July 17, 2012Assignee: Copytele, Inc.Inventors: Frank DiSanto, Denis Krusos
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Patent number: 8212487Abstract: Provided are a field emission device enabling rapid pulse operation and a method of operating the same. The field emission device includes a cathode electrode including a field emission source, an anode electrode disposed to face the cathode electrode and accelerating electrons emitted from the field emission source, a current controller controlling field emission current flowing through the cathode electrode, and a field emission controller applying a pull-up voltage to the cathode electrode when the current controller is turned off.Type: GrantFiled: July 22, 2010Date of Patent: July 3, 2012Assignee: Electronics and Telecommunications Research InstituteInventors: Jin Woo Jeong, Yoon Ho Song, Jae Woo Kim
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Patent number: 8120550Abstract: The present invention relates to a display device that employs edge emitters as a source for pixel electrons. The edge emitters allow the viewing glass plate to be made very small or eliminated, thereby substantially reducing the size of or eliminating the spacers typically utilized in conventional display devices and thereby enabling a simple and compact assembly structure. In one embodiment a pixel configuration comprises a phosphor area disposed between a plurality edge emitters, each of which are associated with tynes that are adapted to reduce the distance between the emitters and that separate the phosphor area into segments such that the emitters emit electrons when the voltage between a phosphor segment and the an emitter exceed a threshold voltage to cause the phosphor segment to emit light.Type: GrantFiled: August 4, 2006Date of Patent: February 21, 2012Assignee: Copytele, Inc.Inventors: Frank J. DiSanto, Denis A. Krusos
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Patent number: 8085224Abstract: An image display apparatus of this invention includes a neighborhood data integration section 20 which integrates image data on respective colors corresponding to electron emitting devices proximate to an electron emitting device to be driven, and corresponding to a phosphor contributing to a halation, an adder 6 adds the integrated image data R22, G22, and B22 on the respective colors, a coefficient operation section 7 which multiplies an addition result by a predetermined coefficient according to a luminous intensity of the halation, an adder 8 which adds outputs R23, G23, and B23 obtained by inverting a sign of multiplication results to image data R14, G14, and B14 corresponding to the electron emitting device to be driven, respectively, and a comparator 11 which compares an addition result with zero in magnitude, and which outputs a driving signal R25 for the respective colors.Type: GrantFiled: June 30, 2008Date of Patent: December 27, 2011Assignee: Canon Kabushiki KaishaInventors: Izumi Kanai, Hisanobu Azuma
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Patent number: 8068070Abstract: An image display apparatus includes a display panel having a plurality of electron emission portions that emit electrons, a plurality of light emitting regions positioned corresponding to the plurality of electron emission portions to emit light in response to irradiation of electrons from the electron emission portion thereon, and a shielding member provided between a substrate having the electron emission portions provided thereon and an opposing substrate having the light emitting regions thereon, and a correction circuit that corrects a pixel signal for modulating the electron emission portions. The shielding member shields electrons reflected from peripheral light emitting regions adjacent to a predetermined one of the light emitting regions to the predetermined light emitting region, and irradiates electrons from the shielding member to the predetermined light emitting region.Type: GrantFiled: March 5, 2009Date of Patent: November 29, 2011Assignee: Canon Kabushiki KaishaInventors: Hideaki Yui, Akira Hayama
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Patent number: 8054249Abstract: Provided is a field emission display (FED) capable of driving on the basis of current and preventing leakage current caused by thin film transistors (TFTs). The FED includes: a plurality of unit pixels including an emission element in which cathode luminescence of a phosphor occurs and a TFT for driving the emission element; a current source for applying a scan signal to each unit pixel; and a voltage source for applying a data signal to each unit pixel. Here, the on-current of the current source is high enough to take care of the load resistance and capacitance of a scan row within a given writing time, and the off-current of the current source is so low that the electron emission of each pixel can be ignored. In addition, the pulse amplitude or pulse width of the data signal applied from the voltage source is changed, and thereby the gray scale of the display is represented.Type: GrantFiled: November 27, 2006Date of Patent: November 8, 2011Assignee: Electronics and Telecommunications Research InstituteInventors: Yoon Ho Song, Dae Jun Kim, Jin Woo Jeong, Jin Ho Lee, Kwang Yong Kang
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Patent number: 8049683Abstract: There is provided a driving circuit capable of driving current flowing in cathode electrodes with high accuracy and displaying without brightness variation. For driving a cathode electrode in a display panel, a first current mirror circuit is fabricated by connecting a gate of first FET and a gate of second FET and a second current mirror circuit is fabricated by connecting a gate of a third FET connected in series to the second FET and a gate of a fourth FET. A brightness signal controls the magnitude of current flowing in the first FET, so that the current flowing to the cathode electrode via the fourth FET can be controlled with high accuracy.Type: GrantFiled: September 11, 2008Date of Patent: November 1, 2011Assignee: Futaba CorporationInventor: Terukazu Sugimoto
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Patent number: 7995851Abstract: A method of and an apparatus for image enhancement taking ambient illuminance into consideration. The image enhancement method includes calculating an original-luminance contrast which is a luminance contrast with respect to an original-luminance of pixels forming an original image, calculating a fade-luminance by reflecting the variation of perceived luminance based on an ambient illuminance into the original-luminance, calculating a defade-luminance by converting the fade-luminance to maintain the original-luminance contrast, and calculating a display-luminance by reflecting the variation of perceived luminance by the ambient illuminance into the defade-luminance. Improving luminance contrast through adjustment of luminance based on ambient illuminance, effectively reduces the fade phenomenon.Type: GrantFiled: February 15, 2006Date of Patent: August 9, 2011Assignee: Samsung Electronics Co., Ltd.Inventors: Seong-deok Lee, Chang-veong Kim, Dmitry Lebedev, Galina Rozhkova, Vladmir Bastakov, Young-Shin Kwak
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Patent number: 7973742Abstract: A method for driving a field emission device (FED) applies an alternating (AC) voltage as a driving voltage for emitting electrons in a field emission device comprising cathode electrode including an emitter and an anode electrode facing the cathode electrode. A method for aging an FED uses a constant voltage so that electrons cannot be emitted from the electron emission source, and an AC voltage so that electrons can be periodically emitted from the emitter when the FED is aged.Type: GrantFiled: May 2, 2007Date of Patent: July 5, 2011Assignee: Samsung Electronics Co., Ltd.Inventors: Chan-Wook Baik, Jeong-Hee Lee, Jeong-Na Heo, Deuk-Seok Chung, Tae-Won Jeong, Kyoung-Won Min
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Patent number: 7944457Abstract: An image display method adapted for a digital display apparatus is provided. The image display method includes the steps of: first, detecting a maximum average picture level of each picture displayed by the digital display apparatus; judging whether the maximum average picture level is larger than a reference value; determining a displaying mode of each picture according to the judgment. The image display method is adapted for improving the displaying quality of a digital display apparatus.Type: GrantFiled: May 17, 2006Date of Patent: May 17, 2011Assignee: Coretronic CorporationInventors: Tzung-I Lin, Yi-Chun Lu, Chia-Yin Lu
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Patent number: 7924243Abstract: The present invention relates to an image display apparatus for forming an image with a plurality of luminescent spots to be precisely aligned in a matrix. For example, a spacer disposed between an electron source and a face plate causes luminescent spots on the face plate spaced unevenly. The luminescent spots spaced unevenly will produce a visual unevenness in luminance which deteriorates the quality of produced image. By modifying the quantity of light of luminescent spots spaced unevenly, the visual unevenness in luminance is compensated.Type: GrantFiled: April 21, 2006Date of Patent: April 12, 2011Assignee: Canon Kabushiki KaishaInventors: Izumi Kanai, Yukio Hiraki, Makiko Mori, Kohei Inamura, Masaru Tada, Toshiyuki Kanda, Tatsuro Yamazaki
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Publication number: 20110007062Abstract: A display panel and a driving method thereof are disclosed. The display panel comprises a plurality of pixel rows, a plurality of data lines and a plurality of gate lines. Each of the pixel rows includes pairs of first and second pixels adjacent to each other. The data lines are positioned between the first and the second pixels, respectively. The gate lines include first, second, third and fourth gate lines arranged in an alternating manner. The method comprises the following steps: turning on the gate lines in a sequence of first, second, fourth and third gate lines; and transmitting the data signal to the pixels through the data lines. The panel is applicable to an LCD panel and an LCD apparatus.Type: ApplicationFiled: October 13, 2009Publication date: January 13, 2011Applicant: CHUNGHWA PICTURE TUBES, LTD.Inventors: SHU-MING CHANG, MING-WEI HUANG, HSIANG-LUN LIU
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Patent number: 7863823Abstract: A method of improving uniformity of brightness between pixels in an electron emission panel includes respectively applying a scan driving voltage and a data driving voltage to a scan electrode and a data electrode of each of a plurality of pixels, wherein one of the scan driving voltage and the data driving voltage is higher than the other; measuring a brightness of each of the pixels; and respectively applying a scan adjustment voltage and a data adjustment voltage to the scan electrode and the data electrode of each of the pixels based on the measured brightness of a respective one of the pixels, wherein a higher one of the scan adjustment voltage and the data adjustment voltage is applied to a same one of the scan electrode and the data electrode to which a lower one of the scan driving voltage and the data driving voltage is applied.Type: GrantFiled: March 22, 2006Date of Patent: January 4, 2011Assignee: Samsung SDI Co., Ltd.Inventor: Ji-Hong Lim
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Patent number: 7855500Abstract: An electron emission display that can mitigate or prevent problems of an arc discharge and a wire disconnection due to increases in resistance at portions where a sealing member contacts electrodes includes: an electron emission device on which upper surfaces of electrodes are exposed, a front panel that is disposed in front of the electron emission device, the front panel being of a phosphor material, and a sealing member that seals a space formed by the electron emission device and the front panel by being disposed on the edges of the space in contact with the electrodes. The electrodes are formed on an entire surface of the electron emission device with a narrow width at an end portion of the electron emission device where the electrodes are connected to an external power source, and the sealing member contacts the electrodes closer to the space than end portions of the electrodes where the width of the electrodes is narrowed.Type: GrantFiled: March 7, 2007Date of Patent: December 21, 2010Assignee: Samsung SDI Co., Ltd.Inventor: Jae-Sang Ha