Patents by Inventor Sang-myeon Han
Sang-myeon Han 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: 20240153441Abstract: Provided is a control device connected to a display panel including a controller configured to display images by driving the display panel according to data corresponding to image frames, and a memory connected to the controller. The controller is configured to select at least one of the image frames as a reference image frame, and update stress data corresponding to a partial area of the display panel in the memory based on one image data block selected from image data blocks of the reference image frame.Type: ApplicationFiled: May 16, 2023Publication date: May 9, 2024Inventors: Jong Man KIM, Byoung Kwan AN, Sang Myeon HAN, Seung Ho PARK, Nam Jae LIM, Joon Hyeok JEON
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Patent number: 11972721Abstract: A display device is disclosed that includes pixels, a memory, and a degradation compensator. The pixels include light emitting elements. The memory is operable to store degradation information including degradation degrees of the light emitting elements. The degradation compensator is operable to receive the degradation information and generate output grayscales by changing each of input grayscales of the pixels in proportion to each of the degradation degrees. The degradation compensator includes a degradation information changer for changing the degradation information by decreasing a degradation degree having a variation greater than a threshold value among variations of the degradation degrees.Type: GrantFiled: September 20, 2022Date of Patent: April 30, 2024Assignee: Samsung Display Co., Ltd.Inventors: Jae Hoon Lee, Kyoung Ho Lim, Seung Ho Park, Hee Sook Park, Sang Myeon Han
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Publication number: 20240135858Abstract: A display device includes pixels connected to scan lines and data lines, each pixel including a driving transistor and at least one light emitting element, and a timing controller configured to generate output data using external input data. The timing controller includes a first compensator configured generate first data by correcting the external input data using at least one of optical measurement information, a threshold voltage of each of the driving transistors, mobility information, dimming information, and temperature information, and an afterimage compensator configured to generate second data based on age information of each light emitting element and the first data, generate third data based on a current amount corresponding to the first data and a current amount corresponding to the second data, and generate the age information by accumulating the third data.Type: ApplicationFiled: May 17, 2023Publication date: April 25, 2024Inventors: Joon Hyeok JEON, Byoung Kwan AN, Sang Myeon HAN, Chang Hun KIM, Seung Ho PARK, Seok Gyu BAN, Nam Jae LIM
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Patent number: 11830405Abstract: A display device includes: a display panel including a plurality of pixels; a deterioration compensator that outputs compensation data based on a lifetime value of the plurality of pixels and an input grayscale of input image data; a scan driver that supplies a scan signal to the display panel; and a data driver that supplies a data signal corresponding to the compensation data to the display panel. The deterioration compensator includes a grayscale-current converter that calculates an input current corresponding to the input grayscale.Type: GrantFiled: April 12, 2022Date of Patent: November 28, 2023Assignee: Samsung Display Co., Ltd.Inventors: Jae Hoon Lee, Kyung Sik Joo, Sang Myeon Han
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Patent number: 11670212Abstract: An image sticking compensation device includes: a deterioration calculator which calculates deterioration data of a current frame based on input image data and sensing frequency information which are received from a timing controller; an accumulator which accumulates the deterioration data and generates age data in which the deterioration data is accumulated; and a compensator which determines a grayscale compensation value corresponding to the age data and an input grayscale value of the input image data, and outputs age compensation data by applying the grayscale compensation value to the input image data. The sensing frequency information includes a frequency of the current frame, and the deterioration data varies in accordance with the frequency of the current frame.Type: GrantFiled: November 10, 2021Date of Patent: June 6, 2023Assignee: SAMSUNG DISPLAY CO., LTD.Inventors: Jae Hoon Lee, Seung Ho Park, Jin Ho Lee, Sang Myeon Han
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Publication number: 20230138436Abstract: A display device is disclosed that includes pixels, a memory, and a degradation compensator. The pixels include light emitting elements. The memory is operable to store degradation information including degradation degrees of the light emitting elements. The degradation compensator is operable to receive the degradation information and generate output grayscales by changing each of input grayscales of the pixels in proportion to each of the degradation degrees. The degradation compensator includes a degradation information changer for changing the degradation information by decreasing a degradation degree having a variation greater than a threshold value among variations of the degradation degrees.Type: ApplicationFiled: September 20, 2022Publication date: May 4, 2023Inventors: Jae Hoon LEE, Kyoung Ho LIM, Seung Ho PARK, Hee Sook PARK, Sang Myeon HAN
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Publication number: 20230038211Abstract: A image sticking compensating device according to example embodiments includes a degradation calculator configured to calculate a degradation weight based on input image data, and to calculate degradation data of a frame, an accumulator configured to accumulate the degradation data, and to generate age data using the accumulated degradation data, and a compensator configured to determine a grayscale compensation value corresponding to the age data and an input grayscale of the input image data, and to output age compensation data by applying the grayscale compensation value to the input image data.Type: ApplicationFiled: October 17, 2022Publication date: February 9, 2023Inventor: Sang-Myeon HAN
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Publication number: 20230030225Abstract: A display device includes: a display panel including a plurality of pixels; a deterioration compensator that outputs compensation data based on a lifetime value of the plurality of pixels and an input grayscale of input image data; a scan driver that supplies a scan signal to the display panel; and a data driver that supplies a data signal corresponding to the compensation data to the display panel. The deterioration compensator includes a grayscale-current converter that calculates an input current corresponding to the input grayscale.Type: ApplicationFiled: April 12, 2022Publication date: February 2, 2023Inventors: Jae Hoon LEE, Kyung Sik JOO, Sang Myeon HAN
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Patent number: 11501700Abstract: A image sticking compensating device according to example embodiments includes a degradation calculator configured to calculate a degradation weight based on input image data, and to calculate degradation data of a frame, an accumulator configured to accumulate the degradation data, and to generate age data using the accumulated degradation data, and a compensator configured to determine a grayscale compensation value corresponding to the age data and an input grayscale of the input image data, and to output age compensation data by applying the grayscale compensation value to the input image data.Type: GrantFiled: November 5, 2020Date of Patent: November 15, 2022Inventor: Sang-Myeon Han
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Patent number: 11398173Abstract: Provided is a display device. The display device includes pixels including light emitting elements, a weight calculation unit configured to calculate a weight of one of the pixels based on an amount of current flowing therethrough and a number of light emitting elements thereof, a deterioration accumulation unit configured to accumulate a deterioration amount of the one of the pixels based on the weight and previous compensation data thereof, and a data compensation unit configured to generate compensation data to be supplied to the one of the pixels based on the deterioration amount thereof.Type: GrantFiled: June 9, 2021Date of Patent: July 26, 2022Assignee: Samsung Display Co., Ltd.Inventor: Sang Myeon Han
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Publication number: 20220223092Abstract: An image sticking compensation device includes: a deterioration calculator which calculates deterioration data of a current frame based on input image data and sensing frequency information which are received from a timing controller; an accumulator which accumulates the deterioration data and generates age data in which the deterioration data is accumulated; and a compensator which determines a grayscale compensation value corresponding to the age data and an input grayscale value of the input image data, and outputs age compensation data by applying the grayscale compensation value to the input image data. The sensing frequency information includes a frequency of the current frame, and the deterioration data varies in accordance with the frequency of the current frame.Type: ApplicationFiled: November 10, 2021Publication date: July 14, 2022Inventors: JAE HOON LEE, Seung Ho PARK, Jin Ho LEE, Sang Myeon HAN
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Patent number: 11315524Abstract: A method for restoring deterioration data of a display device, includes: reading deterioration data from a first storage unit; determining whether the deterioration data is abnormal by comparing a first deterioration value of a first block with adjacent deterioration values of adjacent blocks adjacent to the first block; restoring the deterioration data based on a look-up table in which a luminance retention rate according to a degree of deterioration is set and sensing data provided from a sensing unit, when the deterioration data is determined to be abnormal; and generating second image data by compensating for first image data based on the restored deterioration data. The display device includes blocks each including a pixel, the blocks include the first and adjacent blocks, the deterioration data includes deterioration values each representing a degree of deterioration of each of the blocks, and the deterioration values include the first and adjacent deterioration values.Type: GrantFiled: February 26, 2021Date of Patent: April 26, 2022Assignee: SAMSUNG DISPLAY CO., LTD.Inventors: Byoung Kwan An, Sang Myeon Han, Joon Hyeok Jeon
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Publication number: 20220068176Abstract: Provided is a display device. The display device includes pixels including light emitting elements, a weight calculation unit configured to calculate a weight of one of the pixels based on an amount of current flowing therethrough and a number of light emitting elements thereof, a deterioration accumulation unit configured to accumulate a deterioration amount of the one of the pixels based on the weight and previous compensation data thereof, and a data compensation unit configured to generate compensation data to be supplied to the one of the pixels based on the deterioration amount thereof.Type: ApplicationFiled: June 9, 2021Publication date: March 3, 2022Inventor: Sang Myeon Han
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Publication number: 20220059051Abstract: A method for restoring deterioration data of a display device, includes: reading deterioration data from a first storage unit; determining whether the deterioration data is abnormal by comparing a first deterioration value of a first block with adjacent deterioration values of adjacent blocks adjacent to the first block; restoring the deterioration data based on a look-up table in which a luminance retention rate according to a degree of deterioration is set and sensing data provided from a sensing unit, when the deterioration data is determined to be abnormal; and generating second image data by compensating for first image data based on the restored deterioration data. The display device includes blocks each including a pixel, the blocks include the first and adjacent blocks, the deterioration data includes deterioration values each representing a degree of deterioration of each of the blocks, and the deterioration values include the first and adjacent deterioration values.Type: ApplicationFiled: February 26, 2021Publication date: February 24, 2022Inventors: Byoung Kwan AN, Sang Myeon HAN, Joon Hyeok JEON
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Patent number: 11170703Abstract: There are provided a display device, driving method and sensing unit thereof, where a display device includes a display unit having pixels connected to signal lines; a sensing unit including at least one current sensor connected to at least one of the signal lines; and a compensator connected between the sensing unit and the display unit, wherein the compensator is configured to: calculate degradation weights for positions of the pixels, based on a sensing current measured by the sensing unit and a predetermined reference current value, update degradation accumulated values for the positions whenever the sensing current is measured, by accumulating degradation degrees in which the degradation weights are reflected, generate compensated grayscale values by compensating input grayscale values based on the updated degradation accumulated values, and output the compensated grayscale values to the pixels.Type: GrantFiled: September 10, 2020Date of Patent: November 9, 2021Assignee: SAMSUNG DISPLAY CO., LTD.Inventors: Jae Hoon Lee, Sang Myeon Han, Jong Wook Kim, Byoung Kwan An
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Publication number: 20210210000Abstract: There are provided a display device, driving method and sensing unit thereof, where a display device includes a display unit having pixels connected to signal lines; a sensing unit including at least one current sensor connected to at least one of the signal lines; and a compensator connected between the sensing unit and the display unit, wherein the compensator is configured to: calculate degradation weights for positions of the pixels, based on a sensing current measured by the sensing unit and a predetermined reference current value, update degradation accumulated values for the positions whenever the sensing current is measured, by accumulating degradation degrees in which the degradation weights are reflected, generate compensated grayscale values by compensating input grayscale values based on the updated degradation accumulated values, and output the compensated grayscale values to the pixels.Type: ApplicationFiled: September 10, 2020Publication date: July 8, 2021Inventors: Jae Hoon Lee, Sang Myeon Han, Jong Wook Kim, Byoung Kwan An
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Patent number: 11056053Abstract: A display device and a method of driving the same. The display device includes a display panel including a plurality of pixels, a degradation compensator configured to output compensation data based on age values of the plurality of pixels and an input grayscale value of input image data, a scan driver configured to supply a scan signal to the display panel, and a data driver configured to supply a data signal corresponding to the compensation data to the display panel. The degradation compensator includes a first compensation unit configured to generate a first compensation grayscale value with reference to the input grayscale value and a first age value, and a second compensation unit configured to generate a second compensation grayscale value with reference to the first compensation grayscale value and the first age value.Type: GrantFiled: May 15, 2019Date of Patent: July 6, 2021Assignee: Samsung Display Co., Ltd.Inventors: Jae Hoon Lee, Dong Hak Pyo, Seung Ho Park, Kyoung Ho Lim, Sang Myeon Han
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Patent number: 10971065Abstract: A display device includes a display panel including first, second, and third color sub-pixels, a data driver, a scan driver, a power supply to provide a power supply voltage to the display panel, and a controller. The controller includes a pure color index calculator to calculate first through third pure color indexes of first through third sub-pixel data, a pure color index histogram generator to generate first through third high pure color index histograms, and first through third low pure color index histograms, a histogram analyzer to determine first through third effective maximum gray levels for the first through third color sub-pixels according to the first through third high pure color index histograms and the first through third low pure color index histograms, and a power supply voltage controller to determine a voltage level of the power supply voltage according to the first through third effective maximum gray levels.Type: GrantFiled: May 13, 2020Date of Patent: April 6, 2021Assignee: Samsung Display Co., Ltd.Inventors: Seokha Hong, Sang Myeon Han, Jae Hoon Lee
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Patent number: 10950181Abstract: Systems and methods are described for displaying an image during an initial driving period. An exemplary display device includes a timing controller configured to reconstruct compensation reference data from a first memory into a plurality of transmission data, sequentially transmit the plurality of transmission data to a second memory, and display an image on the display panel when partial transmission data of the plurality of transmission data are transmitted and stored to the second memory during the initial driving period.Type: GrantFiled: June 26, 2019Date of Patent: March 16, 2021Assignee: SAMSUNG DISPLAY CO., LTD.Inventors: Sang Myeon Han, Seung Ho Park, Jae Hoon Lee
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Publication number: 20210065623Abstract: A display device includes a display panel including first, second, and third color sub-pixels, a data driver, a scan driver, a power supply to provide a power supply voltage to the display panel, and a controller. The controller includes a pure color index calculator to calculate first through third pure color indexes of first through third sub-pixel data, a pure color index histogram generator to generate first through third high pure color index histograms, and first through third low pure color index histograms, a histogram analyzer to determine first through third effective maximum gray levels for the first through third color sub-pixels according to the first through third high pure color index histograms and the first through third low pure color index histograms, and a power supply voltage controller to determine a voltage level of the power supply voltage according to the first through third effective maximum gray levels.Type: ApplicationFiled: May 13, 2020Publication date: March 4, 2021Inventors: Seokha HONG, Sang Myeon HAN, Jae Hoon LEE