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公开(公告)号：US20180158408A1
公开(公告)日：2018-06-07
申请号：US15835121
申请日：2017-12-07
发明人： Se Byung Chae , Weon Jun Choe , Jin Young Jeon
IPC分类号： G09G3/3233
CPC分类号： G09G3/3233 , G09G3/20 , G09G3/3275 , G09G3/3685 , G09G2310/0264 , G09G2310/0275 , G09G2310/0291 , G09G2330/021
摘要： A data driver includes an input unit configured to receive data from outside, a digital-analog converter configured to generate a data signal by using the data, a data comparator configured to compare a reference gray scale value with the data and to generate a first control signal or a second control signal corresponding to a comparison result, and an output unit configured to supply the data signal to data lines, wherein the output unit includes at least one buffer, and a slew rate of the at least one buffer is set to vary depending on whether the first control signal or the second control signal is generated.
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公开(公告)号：US11462146B2
公开(公告)日：2022-10-04
申请号：US17519921
申请日：2021-11-05
发明人： Se Byung Chae , Su Bin Kim , Jin Young Jeon
摘要： A display device includes a display unit including a pixel which displays an image based on a first power voltage and a data signal, a gamma voltage generator which generates gamma voltages, and a data driver which generates the signal using the gamma voltages and provides the data signal to the pixel. The gamma voltage generator generates first and second reference voltages, generates first and second corrected reference voltages by correcting the first and second reference voltages using a target voltage and an external power voltage provided from the display unit in correspondence with the first power voltage, and generates the gamma voltages by dividing the first and second corrected reference voltages. The gamma voltage generator sets the target voltage based on at least one selected from the first reference voltage, the second reference voltage, and a ground voltage.
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公开(公告)号：US09812066B2
公开(公告)日：2017-11-07
申请号：US14680518
申请日：2015-04-07
发明人： Cheol Min Kim , Hyung ryul Kang , Se Byung Chae
IPC分类号： G09G3/20 , G09G3/3291
CPC分类号： G09G3/3291 , G09G3/2092 , G09G2300/0852 , G09G2300/0861 , G09G2310/0251 , G09G2310/0262 , G09G2310/0297 , G09G2320/043
摘要： An organic light emitting display includes a plurality of pixel row groups, a scan driver, a data driver, and a data distributor. Each pixel group includes the same number of pixel rows, and the pixel row groups are sequentially driven. The data distributor demultiplexes data signals for input into the pixels. The data signals are input to the pixels after threshold voltage compensation is performed at substantially a same time for pixels in each of the pixel row groups. Data signals are to be input to pixels in one pixel row group while threshold voltage compensation is performed for pixels in another pixel row group adjacent to the one pixel row group.
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公开(公告)号：US11763723B2
公开(公告)日：2023-09-19
申请号：US17958126
申请日：2022-09-30
发明人： Se Byung Chae , Su Bin Kim , Jin Young Jeon
CPC分类号： G09G3/2007 , G09G3/32 , G09G2310/027 , G09G2310/0291 , G09G2310/0297 , G09G2310/08 , G09G2320/0673
摘要： A display device includes a display unit including a pixel which displays an image based on a first power voltage and a data signal, a gamma voltage generator which generates gamma voltages, and a data driver which generates the signal using the gamma voltages and provides the data signal to the pixel. The gamma voltage generator generates first and second reference voltages, generates first and second corrected reference voltages by correcting the first and second reference voltages using a target voltage and an external power voltage provided from the display unit in correspondence with the first power voltage, and generates the gamma voltages by dividing the first and second corrected reference voltages. The gamma voltage generator sets the target voltage based on at least one selected from the first reference voltage, the second reference voltage, and a ground voltage.
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5.发明授权公开(公告)号：US11587487B2
公开(公告)日：2023-02-21
申请号：US17412609
申请日：2021-08-26
发明人： Hyun Chang Kim , Se Byung Chae
IPC分类号： G09G3/20
摘要： A display driving circuit includes a clock signal generator which generates a clock signal at a frequency in response to a frequency control signal, a frequency variation determiner which adaptively changes a frequency variation of the clock signal, based on a magnitude of a deviation between the frequency of the clock signal and a target frequency calculated based on a reference clock signal supplied from the outside, and a frequency controller which generates the frequency control signal which updates the frequency of the clock signal, based on the frequency variation, and provides the frequency control signal to the clock signal generator.
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公开(公告)号：US20220358881A1
公开(公告)日：2022-11-10
申请号：US17735990
申请日：2022-05-03
发明人： Se Byung Chae , Weon Jun Choe
IPC分类号： G09G3/3233 , G09G3/20
摘要： A display device includes a display panel, a scan driver, a data compensator, and a data driver. The display panel includes a first area and a second area distinguished from each other along a scan direction. Each of the first and second areas include pixels. The scan driver is configured to sequentially provide scan signals to the display panel along the scan direction. The data compensator is configured to: detect a pattern in which a difference between adjacent grayscale values in image data is greater than a reference value; and generate compensated image data by compensating for grayscale values corresponding to the second area in the image data based on the pattern corresponding to the first area. The data driver is configured to: generate data signals based on the compensated image data; and provide the data signals to the display panel.
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公开(公告)号：US10535301B2
公开(公告)日：2020-01-14
申请号：US15835121
申请日：2017-12-07
发明人： Se Byung Chae , Weon Jun Choe , Jin Young Jeon
IPC分类号： G09G3/3233
摘要： A data driver includes an input unit configured to receive data from outside, a digital-analog converter configured to generate a data signal by using the data, a data comparator configured to compare a reference gray scale value with the data and to generate a first control signal or a second control signal corresponding to a comparison result, and an output unit configured to supply the data signal to data lines, wherein the output unit includes at least one buffer, and a slew rate of the at least one buffer is set to vary depending on whether the first control signal or the second control signal is generated.
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公开(公告)号：US20190340974A1
公开(公告)日：2019-11-07
申请号：US16177779
申请日：2018-11-01
发明人： Ji Hyun Ka , Tae Hoon Kwon , Ki Myeong Eom , Chung Yi , Se Byung Chae , Deok Jun Choi , Moon Sang Hwang
IPC分类号： G09G3/3225 , G09G3/3275
摘要： A display device includes: a display region including a first pixel region, a second pixel region, and a third pixel region; a dummy region including a first dummy region disposed between the second pixel region and the third pixel region; first, second, and third pixels respectively arranged in the first pixel region, the second pixel region, and the third pixel region in a matrix of vertical lines and horizontal lines; a data converter configured to: receive first image data including effective data corresponding to the display region and dummy data corresponding to the dummy region; and generate second image data by converting a gray scale value of dummy data corresponding to at least one region of the first dummy region in the first image data into a predetermined first gray scale value, the first gray scale value being between a lowest gray scale value and a highest gray scale value.
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公开(公告)号：US12020629B2
公开(公告)日：2024-06-25
申请号：US17975006
申请日：2022-10-27
发明人： Se Byung Chae
IPC分类号： G09G3/32
CPC分类号： G09G3/32 , G09G2310/027 , G09G2310/0278 , G09G2320/0276
摘要： A display device including: a display panel; a scan driver; and a data driver, wherein the data driver includes: a controller configured to generate a gamma voltage control signal with respect to gamma voltage information corresponding to a target luminance level of an image displayed by the display panel; a gamma voltage generator configured to generate gamma voltages having a voltage range corresponding to the target luminance level based on the gamma voltage control signal; and a decoder configured to generate the data signal corresponding to a grayscale value using the gamma voltages, and wherein the controller calculates an offset value corresponding to the target luminance level and applies the offset value to values obtained using gamma voltage information about sample luminance levels to obtain gamma voltage information corresponding to the target luminance level.
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公开(公告)号：US11996048B2
公开(公告)日：2024-05-28
申请号：US18143071
申请日：2023-05-04
发明人： Se Byung Chae , Seung Kyu Lee
IPC分类号： G09G3/3233 , G09G3/3275
CPC分类号： G09G3/3233 , G09G3/3275 , G09G2300/0819 , G09G2300/0842 , G09G2300/0861 , G09G2310/08 , G09G2320/0214 , G09G2320/0233 , G09G2320/045
摘要： A display device includes a display panel including pixels coupled to a first scan line and a data line, a power supply to supply voltages, a scan driver to provide a first scan signal to the first scan line a plurality of times for a first frame period (FFP), a data driver to supply a data signal to the data line, and a timing controller to control driving of components. The FFP includes: a first active period (FAP), in which the data signal is supplied; and a first blank period (FBP), in which the data signal is not supplied. The power supply provides on-bias power having a first voltage level (FVL) in the FAP, and provides on-bias power having a second voltage level (SVL) in the FBP. The FBP following the FAP includes a first dimming period in which the on-bias power gradually changes from the FVL to the SVL.
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