Patents by Inventor Uk-Chul Choi
Uk-Chul Choi has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 10009604Abstract: A method of driving a display device includes displaying an image corresponding to a left eye image signal during a first frame set including one or more frames and displaying an image corresponding to a right eye image signal during a second frame set including one or more successive frames, in which the first frame set and the second frame set include at least one frame displaying a first image according to a first gamma curve and at least one frame displaying a second image according to a second gamma curve, and the first frame set and the second frame set include two successive frames displaying the second image.Type: GrantFiled: January 4, 2016Date of Patent: June 26, 2018Assignee: SAMSUNG DISPLAY CO., LTD.Inventors: Jung-Won Kim, Joon-Chul Goh, Bong Hyun You, Uk Chul Choi
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Patent number: 9653014Abstract: A method of driving an electro wetting display panel includes applying a first data voltage to a pixel part of the display panel during a first section of a frame and applying a second data voltage different from the first data voltage to the same pixel part during a second section of the frame. The first data voltage is converted from display data based on a first gamma curve. The second data voltage is converted from the display data based on a second gamma curve. Light transmittance through the pixel part is changed based on movement of a fluid within the pixel part.Type: GrantFiled: July 6, 2015Date of Patent: May 16, 2017Assignee: Amazon Technologies, Inc.Inventors: Hyun-Sik Hwang, Uk-Chul Choi, Yong-Jun Jang, Su-Hyeong Park, Ji-Myoung Seo
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Patent number: 9494788Abstract: A display device includes a first electrode, a second electrode, a third electrode, a lyophobic layer, a first liquid, and a second liquid, where the lyophobic layer is lyophobic to the second liquid. A method of driving the display device includes: providing a first potential difference between the first electrode and the third electrode to thereby cause the first liquid to begin moving toward the second electrode; providing a second potential difference between the second electrode and the third electrode while reducing the first potential difference to thereby cause the first liquid to move toward the first electrode; and removing the second potential difference to thereby cause the first liquid to slow down in its movement toward the first electrode or to stop in its movement toward the first electrode.Type: GrantFiled: July 27, 2012Date of Patent: November 15, 2016Assignee: Amazon Technologies, Inc.Inventors: Sang Min Shin, Chang Ku Hua, Woo Song Kim, Uk Chul Choi, Mun-Soo Park, So-Hyun Lee
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Patent number: 9466261Abstract: A display device includes a memory which stores gamma data for gamma curves including a first gamma curve and a second gamma curve; a gray voltage generator which generates gray voltages based on the gamma data; a data driver which receives an input image signal from a signal controller and converts the input image signal into a data voltage using the gray voltages; and a display panel including pixels which receives the data voltage and may display an image, where the pixel displays images corresponding to the input image signal during one frame set, one frame set includes consecutive frames, the images displayed by a pixel includes first and second images displayed based on the first and second gamma curves, respectively, a luminance of the first image is not less than a luminance of the second image, and the second image is displayed in two consecutive frames.Type: GrantFiled: November 30, 2012Date of Patent: October 11, 2016Assignee: SAMSUNG DISPLAY CO., LTD.Inventors: Bong Hyun You, Joon-Chul Goh, Uk Chul Choi, Jung-Won Kim, Nam-Gon Choi, Dong-Won Park
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Patent number: 9430973Abstract: A image signal processing method of a liquid crystal display according to an exemplary embodiment of the present invention includes: receiving a previous image signal and a current image signal as two sequential input image signals; performing a first correction (DCC) and a doubling for the current image signal to generate a correction image signal comprising a plurality of doubled frames for the current image signal; and post-processing the portion of the plurality of doubled frames to generate a final correction image signal.Type: GrantFiled: August 12, 2013Date of Patent: August 30, 2016Assignee: SAMSUNG DISPLAY CO., LTD.Inventors: Nam-Gon Choi, Yong Jun Jang, Jung-Won Kim, Geun Jeong Park, Ji-Woong Jeong, Uk Chul Choi, Joon-Chul Goh, Cheol Woo Park, Bong Hyun You
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Publication number: 20160173866Abstract: A method of driving a display device includes displaying an image corresponding to a left eye image signal during a first frame set including one or more frames and displaying an image corresponding to a right eye image signal during a second frame set including one or more successive frames, in which the first frame set and the second frame set include at least one frame displaying a first image according to a first gamma curve and at least one frame displaying a second image according to a second gamma curve, and the first frame set and the second frame set include two successive frames displaying the second image.Type: ApplicationFiled: January 4, 2016Publication date: June 16, 2016Inventors: Jung-Won KIM, Joon-Chul GOH, Bong Hyun YOU, Uk Chul CHOI
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Patent number: 9324281Abstract: A display device includes a first gate driver that applies a gate-on voltage to gate lines of a first gate line group in each period of n first scan periods for a first frame, n being a natural number. A second gate driver applies a gate-on voltage to gate lines of a second gate line group in each period of n second scan periods for a first frame. A data driver applies a data voltage to a plurality of data lines. A signal controller transmits a control signal to the first and second gate drivers and the data driver, wherein an interval between start points of the n first scan periods is gradually decreased according to time, and an interval between start points of the n second scan periods is gradually increased according to time.Type: GrantFiled: November 28, 2011Date of Patent: April 26, 2016Assignee: SAMSUNG DISPLAY CO., LTD.Inventors: Hyun-Sik Hwang, Uk-Chul Choi, Cheol-Woo Park, Jong-Hee Kim, KyoungHo Lim
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Patent number: 9230488Abstract: A method of driving a display device includes displaying an image corresponding to a left eye image signal during a first frame set including one or more frames and displaying an image corresponding to a right eye image signal during a second frame set including one or more successive frames, in which the first frame set and the second frame set include at least one frame displaying a first image according to a first gamma curve and at least one frame displaying a second image according to a second gamma curve, and the first frame set and the second frame set include two successive frames displaying the second image.Type: GrantFiled: December 3, 2012Date of Patent: January 5, 2016Assignee: SAMSUNG DISPLAY CO., LTD.Inventors: Jung-Won Kim, Joon-Chul Goh, Bong Hyun You, Uk Chul Choi
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Publication number: 20150310796Abstract: A method of driving an electro wetting display panel includes applying a first data voltage to a pixel part of the display panel during a first section of a frame and applying a second data voltage different from the first data voltage to the same pixel part during a second section of the frame. The first data voltage is converted from display data based on a first gamma curve. The second data voltage is converted from the display data based on a second gamma curve. Light transmittance through the pixel part is changed based on movement of a fluid within the pixel part.Type: ApplicationFiled: July 6, 2015Publication date: October 29, 2015Inventors: Hyun-Sik Hwang, Uk-Chul Choi, Yong-Jun Jang, Su-Hyeong Park, Ji-Myoung Seo
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Patent number: 9076378Abstract: A method of driving an electro wetting display panel includes applying a first data voltage to a pixel part of the display panel during a first section of a frame and applying a second data voltage different from the first data voltage to the same pixel part during a second section of the frame. The first data voltage is converted from display data based on a first gamma curve. The second data voltage is converted from the display data based on a second gamma curve. Light transmittance through the pixel part is changed based on movement of a fluid within the pixel part.Type: GrantFiled: October 11, 2012Date of Patent: July 7, 2015Assignee: Amazon Technologies, Inc.Inventors: Hyun-Sik Hwang, Uk-Chul Choi, Yong-Jun Jang, Su-Hyeong Park, Ji-Myoung Seo
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Patent number: 9064463Abstract: A display device includes a display capacitor, a data switching device, and a reset switching device. The data switching device may transmit a data voltage to the display capacitor in response to an activating gate signal that is applied to the data switching device for a activating gate signal duration. The reset switching device may transmit a storage voltage to the display capacitor in response to an activating reset signal that is applied to the first reset switching device for an activating reset signal duration. The storage voltage is configured for resetting a pixel associated with the first display capacitor. The activating reset signal duration is longer than the activating gate signal duration.Type: GrantFiled: September 7, 2012Date of Patent: June 23, 2015Assignee: Amazon Technologies, Inc.Inventors: Kwang-chul Jung, Meehye Jung, Uk Chul Choi, Hyun Sik Hwang
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Patent number: 9019200Abstract: A method of driving an electro-wetting display panel including a pixel part is provided. In the method, data voltages are applied to the electro-wetting display panel during a first time of a frame. The frame has the first time and a second time. The first time has a plurality of horizontal periods. The data voltages are generated based on reference gamma voltages. At least one of reference gamma voltages of one of the horizontal periods is different from another of the reference gamma voltages of another of the horizontal periods. A reset voltage is applied to the electro-wetting display panel during the second time of the frame.Type: GrantFiled: November 12, 2012Date of Patent: April 28, 2015Assignee: Amazon Technologies, Inc.Inventors: Hyun-Sik Hwang, Uk-Chul Choi, Su-Hyeong Park, Cheol-Woo Park, Ji-Myoung Seo, Yong-Jun Jang
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Patent number: 9001027Abstract: The present invention applies the voltage that is swung to the notch electrode of each pixel of the electrowetting display device to reset the oil layer to not backflow such that an additional element is not disposed in the pixel, thereby increasing the aperture ratio of the pixel. Also, the reset signal generator generating and applying the reset signal is disposed inside the electrowetting display device such that additional wiring may not be disposed in the outer part of the panel.Type: GrantFiled: July 20, 2012Date of Patent: April 7, 2015Assignee: Amazon Technologies, Inc.Inventors: Uk Chul Choi, Cheol Woo Park, Hyun Sik Hwang, Yong Jun Jang
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Patent number: 9001106Abstract: A display apparatus includes a display panel, a gate driver, and a data driver. The display panel includes a plurality of gate lines, a plurality of data lines, and a plurality of pixels connected to the gate lines and the data lines to display an image. The gate driver is configured to apply a gate signal to the gate lines and the data driver is configured to apply a data signal to the data lines. At least one intermediate voltage having a voltage level between a first voltage and a second voltage and a data voltage corresponding to a specific gray scale are sequentially applied to at least one pixel of the pixels as the data signal during a frame period.Type: GrantFiled: March 7, 2012Date of Patent: April 7, 2015Assignee: Samsung Display Co., Ltd.Inventors: Uk Chul Choi, Cheol Woo Park, Hyun Sik Hwang, Yongjun Jang
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Patent number: 8970474Abstract: A method for driving an electrophoresis display device includes applying a reset voltage having a first polarity to electrophoresis material of the display device for at least one frame period to display a reset image, applying a first gradation voltage having a second polarity opposite to the first polarity to the electrophoresis material for one frame period to display a first grey image after the reset image is displayed, applying a second gradation voltage having the second polarity to the electrophoresis material corresponding to at least one pixel region of the display device for at least two frame periods to display a second grey image, after the first grey image is displayed; and applying a third gradation voltage having the first polarity to the electrophoresis material corresponding to at least one pixel region for one frame period to display a third grey image, after the second grey image is displayed.Type: GrantFiled: October 19, 2011Date of Patent: March 3, 2015Assignee: Samsung Display Co., Ltd.Inventors: KyoungHo Lim, Cheolwoo Park, Uk chul Choi, JongHee Kim, Hyun Sik Hwang
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Publication number: 20140232756Abstract: A image signal processing method of a liquid crystal display according to an exemplary embodiment of the present invention includes: receiving a previous image signal and a current image signal as two sequential input image signals; performing a first correction (DCC) and a doubling for the current image signal to generate a correction image signal comprising a plurality of doubled frames for the current image signal; and post-processing the portion of the plurality of doubled frames to generate a final correction image signal.Type: ApplicationFiled: August 12, 2013Publication date: August 21, 2014Inventors: Nam-Gon CHOI, Yong Jun Jang, Jung-Won Kim, Geun Jeong Park, Ji-Woong Jeong, UK Chul Choi, Joon-Chul Goh, Cheol Woo Park, Bong Hyun You
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Publication number: 20140063052Abstract: A transparent display apparatus includes a display panel that displays an image, a front camera, a rear camera, and a timing controller. The front camera is disposed on a front surface of the display panel and takes a picture of a user to generate a user data. The rear camera is disposed on a rear surface of the display panel and takes a picture of a background to generate a whole background data. The timing controller receives an image data, the user data, and the whole background data, generates a background data on the basis of the user data and the whole background data, and merges the image data and the background data to generate a modulation data. The user perceives the image obtained by merging the image data with the background data.Type: ApplicationFiled: January 23, 2013Publication date: March 6, 2014Applicant: Samsung Display Co., Ltd.Inventor: Uk Chul CHOI
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Publication number: 20140002509Abstract: A method of driving a display device includes displaying an image corresponding to a left eye image signal during a first frame set including one or more frames and displaying an image corresponding to a right eye image signal during a second frame set including one or more successive frames, in which the first frame set and the second frame set include at least one frame displaying a first image according to a first gamma curve and at least one frame displaying a second image according to a second gamma curve, and the first frame set and the second frame set include two successive frames displaying the second image.Type: ApplicationFiled: December 3, 2012Publication date: January 2, 2014Applicant: SAMSUNG DISPLAY CO., LTD.Inventors: Jung-Won KIM, Joon-Chul Goh, Bong Hyun You, Uk Chul Choi
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Patent number: 8564520Abstract: A method for driving a display panel, the display panel including a plurality of pixels, each of the plurality of pixels including a cholesteric liquid crystal capacitor, includes; applying a common voltage to the display panel, displaying a video on the display panel by applying a data voltage to at least one of the plurality of pixels, the data voltage having a phase which is one of inverted to and substantially the same as a phase of the common voltage with respect to a reference voltage.Type: GrantFiled: September 15, 2009Date of Patent: October 22, 2013Assignee: Samsung Display Co., Ltd.Inventors: Uk-Chul Choi, Nak-Cho Choi, Sung-Woon Kim
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Publication number: 20130257914Abstract: A display device includes a display capacitor, a data switching device, and a reset switching device. The data switching device may transmit a data voltage to the display capacitor in response to an activating gate signal that is applied to the data switching device for a activating gate signal duration. The reset switching device may transmit a storage voltage to the display capacitor in response to an activating reset signal that is applied to the first reset switching device for an activating reset signal duration. The storage voltage is configured for resetting a pixel associated with the first display capacitor. The activating reset signal duration is longer than the activating gate signal duration.Type: ApplicationFiled: September 7, 2012Publication date: October 3, 2013Applicant: SAMSUNG DISPLAY CO., LTDInventors: Kwang-chul JUNG, Meehye JUNG, Uk Chul CHOI, Hyun Sik HWANG