Patents by Inventor Sun-Koo KANG
Sun-Koo KANG 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).
-
Patent number: 11893946Abstract: A display device includes: a display panel, a data driver, and a scan driver. The data driver outputs data signals during a writing frame and outputs a bias voltage during a holding frame. The data driver includes a plurality of driving chips, and each of the driving chips includes: a gamma voltage generator, a data converter, a main output part for outputting corresponding data signals of the data signals during the writing frame, and a sub-output part for outputting the bias voltage during the holding frame. The gamma voltage generator of a selected driving chip among the plurality of driving chips is electrically connected to the sub-output parts disposed in the plurality of driving chips, respectively.Type: GrantFiled: January 19, 2023Date of Patent: February 6, 2024Assignee: SAMSUNG DISPLAY CO., LTD.Inventors: Sun-Koo Kang, Hyunha Yang, Myeongbin Lim
-
Publication number: 20230343296Abstract: A display device includes: a display panel, a data driver, and a scan driver. The data driver outputs data signals during a writing frame and outputs a bias voltage during a holding frame. The data driver includes a plurality of driving chips, and each of the driving chips includes: a gamma voltage generator, a data converter, a main output part for outputting corresponding data signals of the data signals during the writing frame, and a sub-output part for outputting the bias voltage during the holding frame. The gamma voltage generator of a selected driving chip among the plurality of driving chips is electrically connected to the sub-output parts disposed in the plurality of driving chips, respectively.Type: ApplicationFiled: January 19, 2023Publication date: October 26, 2023Inventors: SUN-KOO KANG, HYUNHA YANG, MYEONGBIN LIM
-
Patent number: 11676553Abstract: A display device includes a display panel including first data lines, second data lines, gate lines, and a plurality of pixels, a voltage generator which generates a first driving voltage and a second driving voltage, and a source driver which generates a first data voltage having a first polarity based on the first driving voltage and a second data voltage having a second polarity based on the second driving voltage. The source driver includes a first source driver coupled to the first data lines and a second source driver coupled to the second data lines. The voltage generator alternately provides the first driving voltage and the second driving voltage to each of the first source driver and the second source driver.Type: GrantFiled: June 24, 2019Date of Patent: June 13, 2023Assignee: SAMSUNG DISPLAY CO., LTD.Inventors: Wontae Kim, Sun-Koo Kang
-
Patent number: 11551601Abstract: A display device includes: a gray converter which adds compensation grays to input grays to provide output grays; a data driver which provides data voltages corresponding to the output grays; and a display panel which includes pixels which receives the data voltages, where the gray converter includes: a voltage domain converter which converts the input grays into conversion grays; and a compensation gray calculator which calculates the compensation grays based on the conversion grays.Type: GrantFiled: February 3, 2021Date of Patent: January 10, 2023Assignee: SAMSUNG DISPLAY CO., LTD.Inventors: Ik Hyun Ahn, Sun Koo Kang, Cheol Min Kim, Ji Ye Moon, Ju Gon Seok, Hyeon Uk Won
-
Patent number: 11521558Abstract: The present disclosure relates to a display device. The display device includes a display panel, data lines, a constant voltage line, a feedback line, and a display driver. The display panel includes pixels. The data lines transfer data voltages to the pixels. The constant voltage line transfers a constant voltage to the pixels. The feedback line is coupled to the constant voltage line. The display driver is configured to sense a change amount of the constant voltage through the feedback line, generate compensated image data by compensating image data according to the sensed change amount of the constant voltage, and provide the data voltages corresponding to the compensated image data to the pixels.Type: GrantFiled: December 30, 2020Date of Patent: December 6, 2022Assignee: SAMSUNG DISPLAY CO., LTD.Inventors: Won Tae Kim, Sun-Koo Kang
-
Patent number: 11222601Abstract: A display panel includes: a plurality of pixels connected to a plurality of data lines and a peripheral area at the periphery of the display area; a first channel group including a plurality of first shared channels respectively connected to shared data lines among the data lines; a second channel group including a plurality of second shared channels respectively connected to the shared data lines; a first source driver connected to the first channel group, the first source driver being configured to supply data signals to the shared data lines through the first channel group; and a second source driver connected to the second channel group, the second source driver being configured to supply the data signals to the shared data lines through the second channel group, wherein the first channel group and the second channel group forms a pair to be commonly connected the shared data lines.Type: GrantFiled: February 21, 2020Date of Patent: January 11, 2022Assignee: Samsung Display Co., Ltd.Inventors: Won Tae Kim, Sun Koo Kang
-
Publication number: 20210398473Abstract: A display device includes: a gray converter which adds compensation grays to input grays to provide output grays; a data driver which provides data voltages corresponding to the output grays; and a display panel which includes pixels which receives the data voltages, where the gray converter includes: a voltage domain converter which converts the input grays into conversion grays; and a compensation gray calculator which calculates the compensation grays based on the conversion grays.Type: ApplicationFiled: February 3, 2021Publication date: December 23, 2021Inventors: Ik Hyun AHN, Sun Koo KANG, Cheol Min KIM, Ji Ye MOON, Ju Gon SEOK, Hyeon Uk WON
-
Patent number: 11176889Abstract: A display apparatus includes a display panel, a data driver, and a power voltage generator. The display panel includes a plurality of pixels and configured to display an image. The data driver is configured to apply a data voltage to the display panel. The power voltage generator is configured to provide a power voltage and an initialization voltage to the display panel. The power voltage generator is configured to receive a feedback initialization voltage from the display panel and configured to compensate the initialization voltage based on the feedback initialization voltage.Type: GrantFiled: July 13, 2020Date of Patent: November 16, 2021Assignee: Samsung Display Co., Ltd.Inventors: Wontae Kim, Bong-Hyun You, Sun-Koo Kang, Joon Chul Goh, Soon-Dong Kim, Jin-Wook Yang, Ki Hong Song
-
Publication number: 20210295781Abstract: The present disclosure relates to a display device. The display device includes a display panel, data lines, a constant voltage line, a feedback line, and a display driver. The display panel includes pixels. The data lines transfer data voltages to the pixels. The constant voltage line transfers a constant voltage to the pixels. The feedback line is coupled to the constant voltage line. The display driver is configured to sense a change amount of the constant voltage through the feedback line, generate compensated image data by compensating image data according to the sensed change amount of the constant voltage, and provide the data voltages corresponding to the compensated image data to the pixels.Type: ApplicationFiled: December 30, 2020Publication date: September 23, 2021Inventors: WON TAE KIM, Sun-Koo KANG
-
Publication number: 20210074216Abstract: A display apparatus includes a display panel, a data driver, and a power voltage generator. The display panel includes a plurality of pixels and configured to display an image. The data driver is configured to apply a data voltage to the display panel. The power voltage generator is configured to provide a power voltage and an initialization voltage to the display panel. The power voltage generator is configured to receive a feedback initialization voltage from the display panel and configured to compensate the initialization voltage based on the feedback initialization voltage.Type: ApplicationFiled: July 13, 2020Publication date: March 11, 2021Inventors: Wontae KIM, Bong-Hyun YOU, Sun-Koo KANG, Joon Chul GOH, Soon-Dong KIM, Jin-Wook YANG, Ki Hong SONG
-
Patent number: 10878760Abstract: A display device including: a display panel including a plurality of pixels; and a data driver configured to arrange the display panel into a plurality of pixel blocks, and to output a data voltage with different slew rates to the plurality of pixel blocks, wherein the slew rates are based on distances of the plurality of pixel blocks from the data driver, wherein a boundary between adjacent pixel blocks with different slew rates is changeable.Type: GrantFiled: February 11, 2019Date of Patent: December 29, 2020Assignee: SAMSUNG DISPLAY CO., LTD.Inventors: Sooyeon Kim, Sun-Koo Kang, Boyeon Kim, Jae-Han Lee, Taegon Im, Moonshik Kang, Junghwan Cho
-
Patent number: 10878774Abstract: A display device includes a timing controller configured to supply a first set signal to a data control signal line in a first frequency mode, and to supply a second set signal and a data signal to the data control signal line in a second frequency mode that is different from the first frequency mode, a data driver configured to recover the data signal supplied to the data control signal line according to a signal recovery characteristic value, to generate a plurality of data voltages based on the recovered data signal, and to adjust the signal recover characteristic value based on the first set signal and the second set signal, and a display unit including a plurality of pixels that emit lights with gray scales corresponding to the plurality of data voltages.Type: GrantFiled: February 27, 2019Date of Patent: December 29, 2020Assignee: Samsung Display Co., Ltd.Inventors: Tae Gon Im, Myeong Su Kim, Bo Yeon Kim, Sun Koo Kang, Yong Bum Kim, Dong Won Park, Jung Hwan Cho
-
Patent number: 10867570Abstract: A display device includes a display panel including data lines, gate lines, and pixels connected to the data lines and the gate lines, a data driver configured to drive the data lines, a plurality of gate drivers, each configured to drive a corresponding portion of the gate lines, and a plurality of feedback lines connected to one of the data lines at a plurality of measurement positions corresponding to the plurality of gate drivers. The data driver applies a test voltage to the data line, receives the test voltage as a plurality of feedback voltages through the plurality of feedback lines, and determines gate shift amounts at the plurality of measurement positions corresponding to the plurality of gate drivers based on the plurality of feedback voltages. The gate drivers apply gate signals to the gate lines that are shifted by the determined gate shift amounts.Type: GrantFiled: April 29, 2019Date of Patent: December 15, 2020Assignee: SAMSUNG DISPLAY CO., LTD.Inventors: Jae-Han Lee, Sun-Koo Kang, Soo Yeon Kim, Tae Gon Im, Moon Shik Kang, Jung Hwan Cho
-
Publication number: 20200312251Abstract: A display panel includes: a plurality of pixels connected to a plurality of data lines and a peripheral area at the periphery of the display area; a first channel group including a plurality of first shared channels respectively connected to shared data lines among the data lines; a second channel group including a plurality of second shared channels respectively connected to the shared data lines; a first source driver connected to the first channel group, the first source driver being configured to supply data signals to the shared data lines through the first channel group; and a second source driver connected to the second channel group, the second source driver being configured to supply the data signals to the shared data lines through the second channel group, wherein the first channel group and the second channel group forms a pair to be commonly connected the shared data lines.Type: ApplicationFiled: February 21, 2020Publication date: October 1, 2020Inventors: Won Tae KIM, Sun Koo KANG
-
Patent number: 10762816Abstract: A display device may include a timing controller, a data driver and a plurality of pixels. The timing controller supplies a clock training pattern over a data/clock signal line in a first time period, and supplies pixel/control data over the data/clock signal line in a second time period. The data driver generates a clock signal, using the clock training pattern, in the first period, and generate a plurality of data voltages based on the plurality of pixel data, using the clock signal, in the second period. The plurality of pixels receive the plurality of data voltages and emit corresponding light. During the second period, the data driver outputs a feedback signal to the timing controller indicating that the locking of the clock signal has failed. The timing controller re-supplies the clock training pattern in response to the feedback signal.Type: GrantFiled: July 26, 2018Date of Patent: September 1, 2020Assignee: SAMSUNG DISPLAY CO., LTD.Inventors: Jae Han Lee, Myeong Su Kim, Sun Koo Kang, Bo Yeon Kim, Dong Won Park, Tae Gon Im, Jung Hwan Cho
-
Patent number: 10665148Abstract: A display apparatus includes a display panel, a first driver and a second driver. The display panel includes a plurality of gate lines and a plurality of data lines. The display panel is configured to display an image based on input image data. The first driver is configured to output compensating gate signals having the same timing to the gate lines during a first period and scan gate signals having different timings to the gate lines during a second period. The second driver is configured to apply a compensating data voltage corresponding to a compensating grayscale value to the data lines during the first period and a target data voltage corresponding to a target grayscale value to the data lines during the second period.Type: GrantFiled: January 11, 2018Date of Patent: May 26, 2020Assignee: SAMSUNG DISPLAY CO., LTD.Inventors: Sun-Koo Kang, Jae-Han Lee, Ok-Kwon Shin
-
Patent number: 10636375Abstract: A display apparatus includes a display panel and a data driver. The display panel is configured to display an image and includes first through fourth data line groups. The first and second data line groups are adjacent to each other, and the third and fourth data line groups are adjacent to each other. The data driver includes a first data driving circuit configured to output first data voltages to the second data line group later than to the first data line group by a first delay time, and configured to output second data voltages to the fourth data line group later than to the third data line group by a second delay time that is different from the first delay time.Type: GrantFiled: March 17, 2017Date of Patent: April 28, 2020Assignee: SAMSUNG DISPLAY CO., LTD.Inventors: Guhui Jo, Sun-Koo Kang, Wontae Kim
-
Publication number: 20200051517Abstract: A display device includes a display panel including first data lines, second data lines, gate lines, and a plurality of pixels, a voltage generator which generates a first driving voltage and a second driving voltage, and a source driver which generates a first data voltage having a first polarity based on the first driving voltage and a second data voltage having a second polarity based on the second driving voltage. The source driver includes a first source driver coupled to the first data lines and a second source driver coupled to the second data lines. The voltage generator alternately provides the first driving voltage and the second driving voltage to each of the first source driver and the second source driver.Type: ApplicationFiled: June 24, 2019Publication date: February 13, 2020Inventors: Wontae KIM, Sun-Koo KANG
-
Patent number: 10482832Abstract: A display apparatus includes a display panel, a gate driving part, and a data driving part. The display panel is configured to display an image, and includes a gate line and a data line. The gate driving part is configured to output a gate signal to the gate line. The data driving part is configured to output a data signal to the data line. A transition time of the data signal is a time when the data signal transitions from a low level to a high level, and the transition time of the data signal increases according to a decrease of a load of the display panel.Type: GrantFiled: March 17, 2017Date of Patent: November 19, 2019Assignee: SAMSUNG DISPLAY CO., LTD.Inventors: Byungkil Jeon, Sun-Koo Kang, Seunghwan Moon, Junpyo Lee
-
Patent number: 10475487Abstract: A data driver includes a first latch, a second latch, a digital-to-analog converter, and an output buffer. The first latch sequentially stores first line data in response to a first sampling signal and outputs the stored data in parallel. The second latch sequentially stores second line data in response to a second sampling signal and outputs the stored data in parallel. The digital-to-analog converter converts the parallel data provided from one of the first and second latches to data voltages. The output buffer outputs the data voltages in response to a delay clock.Type: GrantFiled: March 7, 2018Date of Patent: November 12, 2019Assignee: SAMSUNG DISPLAY CO., LTD.Inventors: Guhui Jo, Wontae Kim, Sun-koo Kang, Taegon Im