Patents by Inventor Seok Ha HONG
Seok Ha HONG 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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Publication number: 20160266704Abstract: A tiled display device includes a first display device including a first display panel configured to sense a touch thereon and display an image signal, and a first controller configured to control the first display panel and transmit a reference signal wirelessly, and a second display device including a second display panel configured to sense a touch thereon and display the image signal, and a second controller configured to control the second display panel and transmit a first ACK signal to the first controller after receiving the reference signal, in which the first controller is configured to determine a first latency time of the second display device by using the reference signal and the first ACK signal and synchronize touch information of the first and second display devices according to the first latency time.Type: ApplicationFiled: September 8, 2015Publication date: September 15, 2016Inventors: Dong-Won PARK, Bong Hyun YOU, Nam-Gon CHOI, Seok Ha HONG, Jung-Won KIM, Dong Gyu LEE, Jae Hyun CHO, Jae Hyung CHO
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Patent number: 9412321Abstract: A display device includes a display panel, a data driver, a gate driver, and a signal controller. The display panel includes a pixel connected to the gate and data lines, and the pixel includes a liquid crystal capacitor. The signal controller obtains compensation data and normal data based on input data for a still image. The signal controller apples the compensation data and normal data to the pixel during different periods of a frame. The compensation data has a value that reduces a difference of operation characteristics of liquid crystal molecules in the liquid crystal capacitor when a data voltage for the display panel changes between different polarities.Type: GrantFiled: July 18, 2014Date of Patent: August 9, 2016Assignee: SAMSUNG DISPLAY CO., LTD.Inventors: Seok Ha Hong, Dae-Gwang Jang, Gi Geun Kim, Sang Mi Kim, Ji Myoung Seo
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Patent number: 9293106Abstract: A controller controls the driving frequency and voltages for a display device. If image data corresponds to a moving picture, the controller drives a data driver and a gate driver at a moving picture frequency. If image data corresponds to a still image, drives the data driver and the gate driver at a still image frequency lower frequency than the moving picture frequency. When the still image is to be displayed, the signal controller also controls leakage current of a thin film transistor of a pixel based on a representative value of the image data, such that positive leakage current applied for a positive data voltage is equal to negative leakage current applied for a negative data voltage.Type: GrantFiled: January 3, 2014Date of Patent: March 22, 2016Assignee: SAMSUNG DISPLAY CO., LTD.Inventors: Seok Ha Hong, Dae-Gwang Jang, Byung Sun Kim, Sang Mi Kim, Ung Gyu Min, Hyun Sik Hwang, Gi Geun Kim, Kyoung Won Lee
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Patent number: 9208712Abstract: A display panel driving apparatus includes a first switching element and a second switching element. The first switching element applies first pixel data to a first pixel connected with a first data line of a display panel during a first sub frame period. The first switching element is connected with a data channel of a data driving part. The second switching element applies second pixel data having a level higher than a level of the first pixel data to a second pixel connected with a second data line of the display panel during a second sub frame period. The second switching element is connected with the data channel. Thus, display quality of a display apparatus may be enhanced.Type: GrantFiled: November 16, 2012Date of Patent: December 8, 2015Assignee: SAMSUNG DISPLAY CO., LTD.Inventors: Hyun-Sik Hwang, Dae-Gwang Jang, Byung-Sun Kim, Sang-Mi Kim, Ji-Myoung Seo, Seok-Ha Hong
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Patent number: 9153196Abstract: A display device includes a display panel including a gate line, a data line, and a pixel connected to the gate line and the data line, a data driver connected to the data line, a gate driver connected to the gate line, and a signal controller controlling the data driver and the gate driver, wherein a circuits powering power source voltage that is normally used for driving the data driver is selectively not applied during a new-image blanking time when the signal controller is not supplying image data to the data driver.Type: GrantFiled: July 11, 2013Date of Patent: October 6, 2015Assignee: Samsung Display Co., Ltd.Inventors: Seok Ha Hong, Dae-Gwang Jang, Sang Mi Kim, Ung Gyu Min, Ji Myoung Seo, Bong Hyun You, Hyun Sik Hwang, Gi Geun Kim, Jong Hee Kim, Kyoung Won Lee
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Publication number: 20150243217Abstract: Provided is a pixel including an organic light emitting diode, a driving circuit, and a light receiving circuit. The driving circuit is configured to supply a driving current corresponding to a data signal supplied through a data line during a scan period to the organic light emitting diode during an emission period, and to supply a first sensing current corresponding to threshold voltage/mobility information of a driving transistor or degradation information of the organic light emitting diode to a feedback line during a current sensing period. The light receiving circuit is configured to supply a second sensing current corresponding to luminance of the organic light emitting diode to the feedback line during the emission period.Type: ApplicationFiled: January 29, 2015Publication date: August 27, 2015Inventors: Dong-Won Park, Joon-Chul Goh, Seok-Ha Hong
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Publication number: 20150221273Abstract: A liquid crystal display device includes a plurality of pixels arranged substantially in a matrix form, where a part of the plurality of pixels defines a pixel column block, a first scan signal is simultaneously applied to an n-th row pixel and an (n+2)-th row pixel of the pixel column block, a second scan signal, which is applied prior to the first scan signal, is simultaneously applied to an (n+1)-th row pixel and an (n+3)-th row pixel of the pixel column block, a first data voltage is applied to the n-th row pixel and the (n+1)-th row pixel, a second data voltage having a polarity different from a polarity of the first data voltage is applied to the (n+2)-th row pixel and the (n+3)-th row pixel, and the polarities of the first data voltage and the second data voltage are inverted on a frame-by-frame basis.Type: ApplicationFiled: June 3, 2014Publication date: August 6, 2015Applicant: Samsung Display Co. Ltd.Inventors: Sang Ik LEE, Young Soo YOON, Joon Chul GOH, In Jae HWANG, Byung Sun KIM, Dae Gwang JANG, Seok Ha HONG
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Publication number: 20150179117Abstract: A method of driving a display panel includes detecting a position of a viewer to output a viewer position detection signal, determining whether the position of the viewer is in a first area or in a second area based on the viewer position detection signal to output a viewer position signal, and driving a unit pixel of the display panel using a plurality of gamma values according to the viewer position signal. The first area is less than a reference distance, and the second area is not less than the reference distance. Thus, side visibility of a display apparatus may be improved.Type: ApplicationFiled: August 19, 2014Publication date: June 25, 2015Inventors: Seok-Ha Hong, Joon-Chul Goh, Bong-Hyun You, Dae-Gwang Jang
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Patent number: 9030452Abstract: The described technology relates to a liquid crystal display and a driving method thereof. The liquid crystal display includes a plurality of pixels arranged in a matrix form. The pixels include a liquid crystal capacitor including a pixel electrode and a common electrode as two terminals. A plurality of data lines transfer data to the plurality of pixels. The pixels include a first pixel and a second pixel, which are adjacent to each other. First and second common signals are applied to the common electrode of the first and second pixels, respectively. The second common signal is inverted to the first common signal. The first and second common signals swing between a first voltage and a second voltage. The polarity of the data voltage transferred by a data line with respect to the first common signal or the second common signal is constant during one frame.Type: GrantFiled: September 10, 2013Date of Patent: May 12, 2015Assignee: Samsung Display Co., Ltd.Inventors: Dae-Gwang Jang, Seok Ha Hong, Joon-Chul Goh, Byung Sun Kim, Sang Mi Kim, Ji Myoung Seo
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Patent number: 8982108Abstract: A display device including: a display panel; and a signal controller which controls signals for driving the display panel, where the signal controller includes a representative value generator which sequentially operates a portion of image data of one frame, where the representative value generator moves a last position digit into another position digit of the portion of the image data and generates a representative value representing a portion of a frame image corresponding to the portion of the image data; a storage portion which stores the representative value therein; and a comparator which compares the representative values of present and prior frames to determine whether the portion of the frame image is a still image or a motion picture, and the signal controller controls the signals for driving the display panel such that a driving frequency for the still image is lower than a driving frequency for the motion picture.Type: GrantFiled: November 30, 2012Date of Patent: March 17, 2015Assignee: Samsung Display Co., Ltd.Inventors: Kyoung Won Lee, Seung Seok Nam, Cheol Woo Park, Kyoung Ho Lim, Dae-Gwang Jang, Gi Geun Kim, Eun Ho Lee, Ung Gyu Min, Seok Ha Hong
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Publication number: 20150022747Abstract: A display device includes a display panel, a data driver, a gate driver, and a signal controller. The display panel includes a pixel connected to the gate and data lines, and the pixel includes a liquid crystal capacitor. The signal controller obtains compensation data and normal data based on input data for a still image. The signal controller apples the compensation data and normal data to the pixel during different periods of a frame. The compensation data has a value that reduces a difference of operation characteristics of liquid crystal molecules in the liquid crystal capacitor when a data voltage for the display panel changes between different polarities.Type: ApplicationFiled: July 18, 2014Publication date: January 22, 2015Inventors: Seok Ha HONG, Dae-Gwang JANG, Gi Geun KIM, Sang Mi KIM, Ji Myoung SEO
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Publication number: 20150009241Abstract: A method of driving a display panel includes determining a source voltage level by a vertical portion in a present horizontal line of the display panel based on data of the present horizontal line, the display panel including a plurality of vertical portions extended along a vertical direction and arranged in a horizontal direction (the plurality of vertical portions including a vertical portion), generating correction data of the present horizontal line by the vertical portion utilizing the source voltage level of the present horizontal line determined by the vertical portion, generating a source voltage of the present horizontal line by the vertical portion utilizing the source voltage level of the horizontal line determined by the vertical portion, and driving the display panel by the vertical portion utilizing the correction data and the source voltage of the present horizontal line.Type: ApplicationFiled: October 30, 2013Publication date: January 8, 2015Applicant: Samsung Display Co., Ltd.Inventors: Jung-Taek Kim, Young-Soo Yoon, Eun-Ho Lee, Ji-Woong Jeong, Seok-Ha Hong
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Publication number: 20140375627Abstract: A display device and driving method thereof are disclosed. In one aspect, the display device includes a display panel displaying a still image and a moving image and a signal control unit controlling signals for driving the display panel and controlling a frequency of the display panel based on a low frequency enable signal. The signal control unit controls the driving of the display panel at a low frequency when the still image is applied to the display panel and the driving of the display panel at a normal driving frequency after a first time elapses. The signal control unit further controls the driving of the display panel at a low frequency after a second time elapses.Type: ApplicationFiled: June 17, 2014Publication date: December 25, 2014Inventors: Byung Sun Kim, Dae-Gwang Jang, Seok Ha Hong
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Publication number: 20140354619Abstract: A controller for a liquid crystal display includes a data driver and a gate driver. The data driver applies data voltages having different polarities to a first pixel and a second pixel. The gate driver applies different gate-on voltages to a first gate line coupled to the first pixel and a second gate line coupled to the second pixel. The gate-on voltages have at least one of a different width or a different level when at least one of a still image or a moving picture is to be displayed. The different gate-on voltages translate into different pixel charging speeds, which may translate into improvements in the luminance and/or other properties of the display.Type: ApplicationFiled: December 27, 2013Publication date: December 4, 2014Applicant: Samsung Display Co., Ltd.Inventors: Dae-Gwang JANG, Seok Ha HONG
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Publication number: 20140313181Abstract: A controller controls the driving frequency and voltages for a display device. If image data corresponds to a moving picture, the controller drives a data driver and a gate driver at a moving picture frequency. If image data corresponds to a still image, drives the data driver and the gate driver at a still image frequency lower frequency than the moving picture frequency. When the still image is to be displayed, the signal controller also controls leakage current of a thin film transistor of a pixel based on a representative value of the image data, such that positive leakage current applied for a positive data voltage is equal to negative leakage current applied for a negative data voltage.Type: ApplicationFiled: January 3, 2014Publication date: October 23, 2014Applicant: SAMSUNG DISPLAY CO., LTD.Inventors: Seok Ha HONG, Dae-Gwang JANG, Byung Sun KIM, Sang Mi KIM, Ung Gyu MIN, Hyun Sik HWANG, Gi Geun KIM, Kyoung Won LEE
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Publication number: 20140313113Abstract: The described technology relates to a liquid crystal display and a driving method thereof. The liquid crystal display includes a plurality of pixels arranged in a matrix form. The pixels include a liquid crystal capacitor including a pixel electrode and a common electrode as two terminals. A plurality of data lines transfer data to the plurality of pixels. The pixels include a first pixel and a second pixel, which are adjacent to each other. First and second common signals are applied to the common electrode of the first and second pixels, respectively. The second common signal is inverted to the first common signal. The first and second common signals swing between a first voltage and a second voltage. The polarity of the data voltage transferred by a data line with respect to the first common signal or the second common signal is constant during one frame.Type: ApplicationFiled: September 10, 2013Publication date: October 23, 2014Applicant: Samsung Display Co., Ltd.Inventors: Dae-Gwang Jang, Seok Ha Hong, Joon-Chul Goh, Byung Sun Kim, Sang Mi Kim, Ji Myoung Seo
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Publication number: 20140160182Abstract: A display device includes a display panel including a gate line, a data line, and a pixel connected to the gate line and the data line, a data driver connected to the data line, a gate driver connected to the gate line, and a signal controller controlling the data driver and the gate driver, wherein a circuits powering power source voltage that is normally used for driving the data driver is selectively not applied during a new-image blanking time when the signal controller is not supplying image data to the data driver.Type: ApplicationFiled: July 11, 2013Publication date: June 12, 2014Applicant: Samsung Display Co., Ltd.Inventors: Seok Ha HONG, Dae-Gwang JANG, Sang Mi KIM, Ung Gyu MIN, Ji Myoung SEO, Bong Hyun YOU, Hyun Sik HWANG, Gi Geun KIM, Jong Hee KIM, Kyoung Won LEE
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Publication number: 20140085276Abstract: A driving method of a display device includes: determining each of a plurality of pixel rows of the display device as one of a motion picture display pixel row and a still image display pixel row by comparing image data of each of the pixel rows in a current frame and in a previous frame; and driving the motion picture display pixel row with a motion picture frequency and driving the still image display pixel row with a still image display frequency, which is lower than or equal to the motion picture frequency, where a plurality of still image display pixel rows are driven with at least two still image display frequencies.Type: ApplicationFiled: July 24, 2013Publication date: March 27, 2014Applicant: Samsung Display Co., Ltd.Inventors: Dae-Gwang JANG, Ung Gyu MIN, Seok Ha HONG, Hyun Sik HWANG, Byung Sun KIM, Sang Mi KIM, Bong Hyun YOU, Ji Myoung SEO
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Publication number: 20140022220Abstract: A display device including: a display panel; and a signal controller which controls signals for driving the display panel, where the signal controller includes a representative value generator which sequentially operates a portion of image data of one frame, where the representative value generator moves a last position digit into another position digit of the portion of the image data and generates a representative value representing a portion of a frame image corresponding to the portion of the image data; a storage portion which stores the representative value therein; and a comparator which compares the representative values of present and prior frames to determine whether the portion of the frame image is a still image or a motion picture, and the signal controller controls the signals for driving the display panel such that a driving frequency for the still image is lower than a driving frequency for the motion picture.Type: ApplicationFiled: November 30, 2012Publication date: January 23, 2014Applicant: SAMSUNG DISPLAY CO., LTD.Inventors: Kyoung Won LEE, Seung Seok NAM, Cheol Woo PARK, Kyoung Ho LIM, Dae-Gwang JANG, Gi Geun KIM, Eun Ho LEE, Ung Gyu MIN, Seok Ha HONG
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Publication number: 20140015821Abstract: A display panel driving apparatus includes a first switching element and a second switching element. The first switching element applies first pixel data to a first pixel connected with a first data line of a display panel during a first sub frame period. The first switching element is connected with a data channel of a data driving part. The second switching element applies second pixel data having a level higher than a level of the first pixel data to a second pixel connected with a second data line of the display panel during a second sub frame period. The second switching element is connected with the data channel. Thus, display quality of a display apparatus may be enhanced.Type: ApplicationFiled: November 16, 2012Publication date: January 16, 2014Applicant: SAMSUNG DISPLAY CO., LTD.Inventors: Hyun-Sik HWANG, Dae-Gwang Jang, Byung-Sun Kim, Sang-Mi Kim, Ji-Myoung Seo, Seok-Ha Hong