Patents by Inventor Namjae Lim
Namjae Lim 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: 12260819Abstract: A display device includes a display unit which includes a plurality of pixels, a degradation controller which includes a voltage compensator configured to calculate a driving voltage increase amount based on a degradation amount of a maximum degradation pixel among the pixels and a global current controller configured to calculate calculates a first scale factor for compensating a power increase amount according to the driving voltage increase amount, a driving voltage provider which is configured to increase a driving voltage provided to the pixels based on the driving voltage increase amount, a data compensator which is configured to generate output image data by scaling the first scale factor to grayscale values of input image data, and a data driver which is configured to provide data voltages to the pixels based on the output image data.Type: GrantFiled: June 26, 2023Date of Patent: March 25, 2025Assignee: Samsung Display Co., Ltd.Inventors: Namjae Lim, Seokgyu Ban, Sangmyeon Han, Seungho Park, Byoungkwan An
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Patent number: 12183253Abstract: A display apparatus includes: a display panel; a driving controller, which receives input image data including a plurality of normal image frames and a plurality of black image frames, receives a flag indicating a type of each of frames included in the input image data, generates intermediate image data by adjusting a grayscale of the input image data based on the input image data and the flag, and generates a data signal based on the intermediate image data where the type includes a normal image frame and a black image frame; and a data driver, which generates a data voltage based on the data signal and outputs the data voltage to the display panel.Type: GrantFiled: November 18, 2022Date of Patent: December 31, 2024Assignee: SAMSUNG DISPLAY CO., LTD.Inventors: Sungjae Park, Seunghwan Park, Namjae Lim, Youngwoon Choi, Sung-Mo Yang, Jinho Lee
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Patent number: 12165578Abstract: A display driver includes a nonvolatile memory, an encoder, a decoder, and a compensator. The nonvolatile memory is configured to store accumulated stress data and compensation data corresponding to the accumulated stress data. The encoder is configured to encode the compensation data received from the nonvolatile memory to generate encoded compensation data. The decoder is configured to decode the encoded compensation data to generate decoded compensation data. The compensator is configured to process input image data based on the decoded compensation data and generate accumulated stress data.Type: GrantFiled: September 13, 2023Date of Patent: December 10, 2024Assignee: Samsung Display Co., Ltd.Inventors: Jongman Kim, Sangmyeon Han, Byoungkwan An, Seungho Park, Namjae Lim, Joonhyeok Jeon
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Patent number: 12142217Abstract: A display device includes a display panel including a plurality of pixels, a current sensor that senses a sensing current that flows through the pixels, and a data compensator. The data compensator calculates a target current from an image frame of input image data using a current deviation for each position of the image frame and a current contribution ratio for each color of the image frame, and that generates a scale factor by comparing the target current and the sensing current. The display device further includes a timing controller that generates output image data by scaling grayscale values of the input image data using the scale factor; and a data driver that provides a data signal corresponding to the output image data to the pixels.Type: GrantFiled: August 17, 2023Date of Patent: November 12, 2024Assignee: SAMSUNG DISPLAY CO., LTD.Inventors: Namjae Lim, Sungjae Park, Seunghwan Park, Youngwoon Choi, Jinho Lee
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Patent number: 12087207Abstract: A display device includes a display panel, a driving controller, and a voltage generator. The display panel includes a plurality of pixels. Each of the pixels receives a driving voltage through a first voltage line. The driving controller receives an input image signal including first to third color signals and outputs a voltage control signal for controlling a voltage level of the driving voltage based on the first to third color signals. The voltage generator provides the driving voltage to the first voltage line and determines the voltage level of the driving voltage based on the voltage control signal. The driving controller determines first to third gate-source voltages respectively corresponding to the first to third color signals and outputs the voltage control signal based on the first to third gate-source voltages.Type: GrantFiled: August 30, 2022Date of Patent: September 10, 2024Assignee: SAMSUNG DISPLAY CO., LTD.Inventors: Youngwoon Choi, Sungjae Park, Seunghwan Park, Jinho Lee, Namjae Lim
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Patent number: 12073756Abstract: A method of compensating for luminance of a display device includes determining position compensation values of each of panel blocks for measurement grayscale values based on a difference between luminance of a reference panel block and luminance of the each of the panel blocks for the measurement grayscale values, generating a first gamma curve for a first driving frequency and the position compensation values of the each of the panel blocks for the measurement grayscale values, generating a second gamma curve for a second driving frequency and the luminance of the panel blocks for the measurement grayscale values at the first driving frequency, and compensating for input image data based on the first gamma curve and the second gamma curve.Type: GrantFiled: January 30, 2023Date of Patent: August 27, 2024Assignee: Samsung Display Co., Ltd.Inventors: Sungjae Park, Seunghwan Park, Jinho Lee, Namjae Lim, Kyung-Sik Joo
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Patent number: 11961493Abstract: A display device including: a display panel including first through N-th pixel rows; and a panel driver configured to sequentially receive first through N-th line data for the first through the N-th pixel rows in each frame period, and to drive the display panel based on the first through the N-th line data, the panel driver including: a current control circuit configured to determine a current control value for a (K+1)-th pixel row based on the first through K-th line data for the first through K-th pixel rows received in a current frame period and (K+1)-th through the N-th line data for the (K+1)-th through the N-th pixel rows received in a previous frame period; and a data correction circuit configured to correct the (K+1)-th line data for the (K+1)-th pixel row based on the current control value in the current frame period.Type: GrantFiled: September 13, 2022Date of Patent: April 16, 2024Assignee: SAMSUNG DISPLAY CO., LTD.Inventors: Jinho Lee, Seunghwan Park, Youngwoon Choi, Sungjae Park, Seungho Park, Kitae Yoon, Namjae Lim
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Patent number: 11948492Abstract: A display device includes a display panel and a display panel driver. The display panel includes pixels. The display panel driver determines an average image load of input image data, determines an operation mode based on a grayscale value of the input image data and the average image load as a first operation mode or a second operation mode, applies a first scale factor to the input image data in the first operation mode, applies a second scale factor different from the first scale factor to the input image data in the second operation mode, and drives the display panel.Type: GrantFiled: August 2, 2022Date of Patent: April 2, 2024Assignee: SAMSUNG DISPLAY CO., LTD.Inventors: Jinho Lee, Sungjae Park, Seunghwan Park, Namjae Lim, Youngwoon Choi, Jong Wook Kim
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Patent number: 11847978Abstract: A display device includes a display panel, a luminance compensator, and a data driver. The display panel includes a plurality of pixels. The luminance compensator is configured to calculate a scaling factor based on a target current, a black image current, and a sensing current. The target current is calculated based on an input current input to the display panel. The sensing current is measured from the display panel. The data driver is configured to generate a data voltage based on input image data to supply the data voltage to the pixels. The data voltage has a voltage level adjusted based on the scaling factor.Type: GrantFiled: August 8, 2022Date of Patent: December 19, 2023Assignee: Samsung Display Co., Ltd.Inventors: Namjae Lim, Sungjae Park, Seungho Park, Seunghwan Park, Jaehoon Lee, Jinho Lee, Youngwoon Choi
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Patent number: 11817031Abstract: A display device includes: a display panel including a plurality of pixels connected to a plurality of scan lines and a plurality of data lines, respectively; a scan driver, which provides a scan signal to the pixels through the scan lines; a data driver, which provides a data voltage to the pixels through the data lines; and a controller, which controls the scan driver and the data driver, and receives input image data at a variable input frame frequency. The controller determines whether a gray scale value of the input image data is included in any range of a first gray scale range and a second gray scale range different from the first gray scale range, and dithers the input image data when it is determined that the gray scale value of the input image data is included the first gray scale range.Type: GrantFiled: September 8, 2022Date of Patent: November 14, 2023Assignee: SAMSUNG DISPLAY CO., LTD.Inventors: Jinho Lee, Sungjae Park, Seunghwan Park, Youngwoon Choi, Seungho Park, Kyoungho Lim, Namjae Lim
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Patent number: 11763745Abstract: A display device includes a display panel including a plurality of pixels, a current sensor that senses a sensing current that flows through the pixels, and a data compensator. The data compensator calculates a target current from an image frame of input image data using a current deviation for each position of the image frame and a current contribution ratio for each color of the image frame, and that generates a scale factor by comparing the target current and the sensing current. The display device further includes a timing controller that generates output image data by scaling grayscale values of the input image data using the scale factor; and a data driver that provides a data signal corresponding to the output image data to the pixels.Type: GrantFiled: October 3, 2022Date of Patent: September 19, 2023Assignee: SAMSUNG DISPLAY CO., LTD.Inventors: Namjae Lim, Sungjae Park, Seunghwan Park, Youngwoon Choi, Jinho Lee
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Patent number: 11514867Abstract: A display apparatus includes a display panel, a driving controller and a data driver. The display panel is configured to display an image. The driving controller is configured to generate a compensated image data for compensating a decrease of a luminance of an edge portion of the display panel based on input image data. The data driver is configured to output a data voltage to the display panel based on the compensated image data. The driving controller is configured to generate the compensated image data by comparing a maximum value among subpixel grayscale values of the input image data to which a luminance compensating coefficient is applied and a maximum grayscale value of the input image data. The luminance compensating coefficient is configured to be determined according to a location in the display panel.Type: GrantFiled: March 7, 2022Date of Patent: November 29, 2022Inventors: Jinpil Kim, Namjae Lim, Hoisik Moon, Jae Sung Bae
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Publication number: 20220189413Abstract: A display apparatus includes a display panel, a driving controller and a data driver. The display panel is configured to display an image. The driving controller is configured to generate a compensated image data for compensating a decrease of a luminance of an edge portion of the display panel based on input image data. The data driver is configured to output a data voltage to the display panel based on the compensated image data. The driving controller is configured to generate the compensated image data by comparing a maximum value among subpixel grayscale values of the input image data to which a luminance compensating coefficient is applied and a maximum grayscale value of the input image data. The luminance compensating coefficient is configured to be determined according to a location in the display panel.Type: ApplicationFiled: March 7, 2022Publication date: June 16, 2022Inventors: Jinpil KIM, Namjae LIM, Hoisik MOON, Jae Sung BAE
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Patent number: 11355052Abstract: A display apparatus includes a display panel including a plurality of pixels, and a driver which receives input image data, generates final image data by compensating the input image data to increase luminances of pixels disposed in at least one edge portion of the display panel among the plurality of pixels, and drives the display panel based on the final image data. The input image data for a pixel of the pixels is compensated based on a compensation constant determined according to a position of the pixel when the input image data for the pixel represents a gray level higher than or equal to a first reference gray level, and is compensated based on a reduced compensation constant that is reduced from the determined compensation constant when the input image data for the pixel represents the gray level lower than the first reference gray level.Type: GrantFiled: December 2, 2019Date of Patent: June 7, 2022Assignee: SAMSUNG DISPLAY CO., LTD.Inventors: Tae-Jong Jun, Jae Sung Bae, Sanghyun Lee, Daeki Park, Namjae Lim
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Patent number: 11302261Abstract: A display apparatus includes a display panel, a driving controller and a data driver. The display panel is configured to display an image. The driving controller is configured to generate a compensated image data for compensating a decrease of a luminance of an edge portion of the display panel based on input image data. The data driver is configured to output a data voltage to the display panel based on the compensated image data. The driving controller is configured to generate the compensated image data by comparing a maximum value among subpixel grayscale values of the input image data to which a luminance compensating coefficient is applied and a maximum grayscale value of the input image data. The luminance compensating coefficient is configured to be determined according to a location in the display panel.Type: GrantFiled: March 30, 2020Date of Patent: April 12, 2022Inventors: Jinpil Kim, Namjae Lim, Hoisik Moon, Jae Sung Bae
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Patent number: 11056067Abstract: A display apparatus includes a display panel including a plurality of pixels, and a driver which receives input image data, divides a border portion of the display panel into edge regions and corner regions, generates final image data by compensating the input image data such that luminances of the edge regions are increased by a first multiplicative factor and luminances of the corner regions are increased by a second multiplicative factor greater than the first multiplicative factor, and drives the display panel based on the final image data.Type: GrantFiled: December 3, 2019Date of Patent: July 6, 2021Assignee: SAMSUNG DISPLAY CO., LTD.Inventors: Tae-Jong Jun, Daeki Park, Namjae Lim, Jae Sung Bae, Sanghyun Lee
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Patent number: 11043184Abstract: A display device includes a display panel comprising a plurality of pixels, a data driver configured to generate data voltages based on a gamma reference voltage, and to provide the data voltages to the plurality of pixels, a gate driver configured to provide gate signals to the plurality of pixels, and a controller configured to control the data driver and the gate driver. The controller is configured to initialize the gamma reference voltage when a blank period starts in a frame period comprising an active period and the blank period, and to change the gamma reference voltage when a duration of the blank period reaches at least one threshold time.Type: GrantFiled: July 26, 2019Date of Patent: June 22, 2021Assignee: Samsung Display Co., Ltd.Inventors: Taehyeong An, Jai-Hyun Koh, Hoi Sik Moon, Jae Sung Bae, Namjae Lim, Nam-Gon Choi
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Patent number: 10950202Abstract: A display apparatus includes a local dimmer, an image compensator, a display panel and a light source. The local dimmer is configured to generate a dimming signal representing a degree of dimming for a light source block based on input image data. The image compensator is configured to determine a grayscale gain based on input grayscale value of the input image data and the dimming signal and to compensate luminance of the input image data based on the grayscale gain. The display panel is configured to display an image based on the compensated input image data. The light source is configured to provide light to the display panel based on the dimming signal.Type: GrantFiled: October 14, 2019Date of Patent: March 16, 2021Assignee: Samsung Display Co., Ltd.Inventors: Nam-Gon Choi, Hoi Sik Moon, Jai-Hyun Koh, Yoongu Kim, Namjae Lim, Seung Young Choi, JaeSung Bae, Taehyeong An, Byoung Seok Yoo
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Patent number: 10922800Abstract: An image processing circuit includes a memory, a gamma converter which converts a first image data signal of a frame to a current image data signal thereof corresponding to first or second gamma types based on a spatial distribution pattern, a compression circuit which separates the current image data signal into first and second gamma signals corresponding to the first and second gamma types and compresses the first and second gamma signals to first and second compression gamma signals to store the first and second compression gamma signals, a decompression circuit which output a previous image data signal of a previous frame by decompressing the first and second compression gamma signals and combines first and second decompression gamma signals, and a gamma correction circuit which performs a gamma adjustment based on current and previous image data signals to output a second image data signal.Type: GrantFiled: April 10, 2019Date of Patent: February 16, 2021Assignee: SAMSUNG DISPLAY CO., LTD.Inventors: Jinpil Kim, Hoisik Moon, Jaesung Bae, Jeongwoon Lee, Namjae Lim
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Publication number: 20200410940Abstract: A display apparatus includes a display panel, a driving controller and a data driver. The display panel is configured to display an image. The driving controller is configured to generate a compensated image data for compensating a decrease of a luminance of an edge portion of the display panel based on input image data. The data driver is configured to output a data voltage to the display panel based on the compensated image data. The driving controller is configured to generate the compensated image data by comparing a maximum value among subpixel grayscale values of the input image data to which a luminance compensating coefficient is applied and a maximum grayscale value of the input image data. The luminance compensating coefficient is configured to be determined according to a location in the display panel.Type: ApplicationFiled: March 30, 2020Publication date: December 31, 2020Inventors: Jinpil KIM, Namjae LIM, Hoisik MOON, Jae Sung BAE