Patents by Inventor Min-Weun Kim
Min-Weun Kim 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: 20230316991Abstract: A display device includes a luminance correction unit that corrects input data based on a dimming code value and outputs correction data, a gamma correction unit that corrects the correction data and generates output data, a gamma voltage generator that generates gamma voltages depending on a first voltage code value, a data driver that converts the output data into data voltages based on the gamma voltages, and a controller that supplies the dimming code value and the input data to the luminance correction unit and provides the first voltage code value to the gamma voltage generator. The controller compares a highest dimming compares a highest dimming grayscale value of the output data determined by the dimming code value with a highest reference grayscale value and updates the first voltage code value with a second voltage code value.Type: ApplicationFiled: January 20, 2023Publication date: October 5, 2023Inventors: DOWON KIM, MIN-WEUN KIM, SUNG-YEOL BAEK
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Publication number: 20230237949Abstract: An electronic device includes a display layer, a data driving circuit, a scan driving circuit, a driving controller, and a temperature sensor which measures a temperature of the display layer to generate temperature data. The driving controller includes a first lookup table calculating unit which calculates a first lookup table based on the image signal, the temperature data, and a reference lookup table set for each of a plurality of gray levels, a luminance compensating unit which calculates a luminance weight based on luminance data, and a second lookup table calculating unit which calculates a second lookup table based on the first lookup table and the luminance weight, and the driving controller generates the image data based on the image signal and the second lookup table.Type: ApplicationFiled: November 14, 2022Publication date: July 27, 2023Inventors: DOWON KIM, YOON KANG, MIN-WEUN KIM, SUNG-YEOL BAEK
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Publication number: 20230230541Abstract: A display device is disclosed that includes a display panel, a timing controller, and a data driver. The display panel includes a plurality of pixels. The timing controller is configured to calculate an on-pixel ratio of first image data and correct the first image data into second image data based on the on-pixel ratio. The data driver is configured to generate a data signal based on the second image data and provide the data signal to the pixels. The timing controller calculates the second image data by estimating a temperature of the display panel using the on-pixel ratio and gamma-correcting the first image data in response to the temperature.Type: ApplicationFiled: December 23, 2022Publication date: July 20, 2023Inventor: Min Weun KIM
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Patent number: 11386828Abstract: A display device may include a display panel including a plurality of pixels. An interpolator may be configured to generate a first voltage value corresponding to an input data value using a preset gamma lookup table. A gamma compensator may be configured to, based on a dimming value, select at least one of a plurality of preset dimming lookup tables, and may calculate a first output data value by correcting the first voltage value based on the at least one dimming lookup table. A gamma voltage generator may be configured to generate a plurality of gamma voltages having a linear relationship. A data driver may be configured to select a first gamma voltage from among the gamma voltages based on the first output data value, and provide the first gamma voltage, as a data voltage, to the display panel.Type: GrantFiled: May 29, 2020Date of Patent: July 12, 2022Assignee: Samsung Display Co., Ltd.Inventors: Min Weun Kim, Chan Gyeong Lee, Hyeong Uk Lee
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Publication number: 20210110752Abstract: A display device may include a display panel including a plurality of pixels. An interpolator may be configured to generate a first voltage value corresponding to an input data value using a preset gamma lookup table. A gamma compensator may be configured to, based on a dimming value, select at least one of a plurality of preset dimming lookup tables, and may calculate a first output data value by correcting the first voltage value based on the at least one dimming lookup table. A gamma voltage generator may be configured to generate a plurality of gamma voltages having a linear relationship. A data driver may be configured to select a first gamma voltage from among the gamma voltages based on the first output data value, and provide the first gamma voltage, as a data voltage, to the display panel.Type: ApplicationFiled: May 29, 2020Publication date: April 15, 2021Inventors: Min Weun KIM, Chan Gyeong LEE, Hyeong Uk LEE
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Patent number: 10186184Abstract: A display apparatus includes a display panel, a timing controller, and a data driver. The display panel includes subpixels for displaying images. The timing controller accumulates a count value when a same grayscale value repeats for one of the subpixels, determines a boundary portion of the image based on the accumulated count value, and generates a data signal to compensate the boundary portion. The data driver converts the data signal to a data voltage for the display panel.Type: GrantFiled: February 3, 2016Date of Patent: January 22, 2019Assignee: SAMSUNG DISPLAY CO., LTD.Inventor: Min-Weun Kim
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Patent number: 9842569Abstract: A display device is disclosed. The display device comprises a display panel whose luminance changes from a start luminance to a target luminance lower than the start luminance and which displays an image, wherein the image comprises a start frame having the start luminance and a start gamma, a target frame having the target luminance and a target gamma, and a plurality of intermediate frames sequentially placed between the start frame and the target frame, where a difference in the luminance of the display panel between adjacent frames is reduced.Type: GrantFiled: November 11, 2016Date of Patent: December 12, 2017Assignee: Samsung Display Co., Ltd.Inventor: Min Weun Kim
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Patent number: 9720589Abstract: A touch display device includes a touch sensor, a visual accelerator, and a display. The touch sensor senses a touch. The visual accelerator visualizes the touch. The display displays information corresponding to the visualized touch. When the touch is outside a visual acceleration area, the visual accelerator does not process the touch. When the touch is in the visual acceleration area, the visual accelerator visualizes the touch on the display.Type: GrantFiled: March 30, 2015Date of Patent: August 1, 2017Assignee: Samsung Display Co., Ltd.Inventors: Bo Young An, Min-Weun Kim, Sang Rak Kim, Dong Rock Seo, Seong-Keun Ha
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Publication number: 20170061929Abstract: A display device is disclosed. The display device comprises a display panel whose luminance changes from a start luminance to a target luminance lower than the start luminance and which displays an image, wherein the image comprises a start frame having the start luminance and a start gamma, a target frame having the target luminance and a target gamma, and a plurality of intermediate frames sequentially placed between the start frame and the target frame, where a difference in the luminance of the display panel between adjacent frames is reduced.Type: ApplicationFiled: November 11, 2016Publication date: March 2, 2017Inventor: Min Weun Kim
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Patent number: 9508290Abstract: A display device is disclosed. The display device comprises a display panel whose luminance changes from a start luminance to a target luminance lower than the start luminance and which displays an image, wherein the image comprises a start frame having the start luminance and a start gamma, a target frame having the target luminance and a target gamma, and a plurality of intermediate frames sequentially placed between the start frame and the target frame, where a difference in the luminance of the display panel between adjacent frames is reduced.Type: GrantFiled: December 4, 2012Date of Patent: November 29, 2016Assignee: Samsung Display Co., Ltd.Inventor: Min Weun Kim
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Publication number: 20160307492Abstract: A display apparatus includes a display panel, a timing controller, and a data driver. The display panel includes subpixels for displaying images. The timing controller accumulates a count value when a same grayscale value repeats for one of the subpixels, determines a boundary portion of the image based on the accumulated count value, and generates a data signal to compensate the boundary portion. The data driver converts the data signal to a data voltage for the display panel.Type: ApplicationFiled: February 3, 2016Publication date: October 20, 2016Inventor: Min-Weun KIM
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Patent number: 9392653Abstract: An organic light emitting display device includes a display panel including an organic light emitting diode, a power supply including a DC-DC converter that generates a driving voltage for the organic light emitting diode and that provides the driving voltage to the display panel, the DC-DC converter including an inductor and a switch, and an over-current prevention unit that blocks supply of the driving voltage when a value of a current flowing through the inductor is greater than a reference value.Type: GrantFiled: August 22, 2012Date of Patent: July 12, 2016Assignee: Samsung Display Co., Ltd.Inventors: Hee-Chul Lee, Min-Weun Kim
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Patent number: 9324274Abstract: An organic light emitting display device includes a scan driving unit configured to provide a scan signal to pixel circuits via a plurality of scan lines, a data driving unit configured to provide a data signal to the pixel circuits via a plurality of data lines, a power unit configured to provide a first power voltage and a second power voltage to the pixel circuits, the first power voltage being greater than the second power voltage, a gamma reference voltage generating unit configured to generate a gamma reference voltage corresponding to a voltage difference between the first power voltage and a subtraction reference voltage, a gamma voltage generating unit configured to generate a plurality of gamma voltages based on the gamma reference voltage, and to provide the gamma voltages to the data driving unit, and a timing control unit.Type: GrantFiled: May 24, 2013Date of Patent: April 26, 2016Assignee: SAMSUNG DISPLAY CO., LTD.Inventor: Min-Weun Kim
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Publication number: 20160077618Abstract: A touch display device includes a touch sensor, a visual accelerator, and a display. The touch sensor senses a touch. The visual accelerator visualizes the touch. The display displays information corresponding to the visualized touch. When the touch is outside a visual acceleration area, the visual accelerator does not process the touch. When the touch is in the visual acceleration area, the visual accelerator visualizes the touch on the display.Type: ApplicationFiled: March 30, 2015Publication date: March 17, 2016Inventors: Bo Young AN, Min-Weun KIM, Sang Rak KIM, Dong Rock SEO, Seong-Keun HA
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Patent number: 8994762Abstract: An apparatus for generating gray scale voltage includes a brightness/color coordinate correction unit having a gamma table including data corresponding to an image displayed on a pixel unit of an OLED device at a first brightness level, and a gamma reference voltage look-up table including voltage values of red, green, and blue data corresponding to each gray scale and brightness values at the first brightness level in accordance with the gamma table, a gamma control signal output unit configured to output a gamma reference voltage control signal corresponding to a second brightness level in accordance with the gamma table and the gamma reference voltage look-up table, and a gamma correction circuit configured to receive the gamma reference voltage control signal, to generate gray scale voltages corresponding to the second brightness level, and to output the generated gray scale voltages to a data driver.Type: GrantFiled: June 22, 2012Date of Patent: March 31, 2015Assignee: Samsung Display Co., Ltd.Inventors: Sang-Rak Kim, Jeong-Geun Yoo, Min-Weun Kim
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Publication number: 20140111402Abstract: An organic light emitting display device includes a scan driving unit configured to provide a scan signal to pixel circuits via a plurality of scan lines, a data driving unit configured to provide a data signal to the pixel circuits via a plurality of data lines, a power unit configured to provide a first power voltage and a second power voltage to the pixel circuits, the first power voltage being greater than the second power voltage, a gamma reference voltage generating unit configured to generate a gamma reference voltage corresponding to a voltage difference between the first power voltage and a subtraction reference voltage, a gamma voltage generating unit configured to generate a plurality of gamma voltages based on the gamma reference voltage, and to provide the gamma voltages to the data driving unit, and a timing control unit.Type: ApplicationFiled: May 24, 2013Publication date: April 24, 2014Inventor: Min-Weun KIM
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Publication number: 20140063075Abstract: A display device is disclosed. The display device comprises a display panel whose luminance changes from a start luminance to a target luminance lower than the start luminance and which displays an image, wherein the image comprises a start frame having the start luminance and a start gamma, a target frame having the target luminance and a target gamma, and a plurality of intermediate frames sequentially placed between the start frame and the target frame, where a difference in the luminance of the display panel between adjacent frames is reduced.Type: ApplicationFiled: December 4, 2012Publication date: March 6, 2014Applicant: Samsung Display Co., Ltd.Inventor: Min Weun Kim
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Publication number: 20130249955Abstract: An apparatus for generating gray scale voltage includes a brightness/color coordinate correction unit having a gamma table including data corresponding to an image displayed on a pixel unit of an OLED device at a first brightness level, and a gamma reference voltage look-up table including voltage values of red, green, and blue data corresponding to each gray scale and brightness values at the first brightness level in accordance with the gamma table, a gamma control signal output unit configured to output a gamma reference voltage control signal corresponding to a second brightness level in accordance with the gamma table and the gamma reference voltage look-up table, and a gamma correction circuit configured to receive the gamma reference voltage control signal, to generate gray scale voltages corresponding to the second brightness level, and to output the generated gray scale voltages to a data driver.Type: ApplicationFiled: June 22, 2012Publication date: September 26, 2013Inventors: Sang-Rak KIM, Jeong-Geun YOO, Min-Weun KIM
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Publication number: 20130113773Abstract: An organic light emitting display device includes a display panel including an organic light emitting diode, a power supply including a DC-DC converter that generates a driving voltage for the organic light emitting diode and that provides the driving voltage to the display panel, the DC-DC converter including an inductor and a switch, and an over-current prevention unit that blocks supply of the driving voltage when a value of a current flowing through the inductor is greater than a reference value.Type: ApplicationFiled: August 22, 2012Publication date: May 9, 2013Inventors: Hee-Chul Lee, Min-Weun Kim