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公开(公告)号：US11276370B2
公开(公告)日：2022-03-15
申请号：US16805804
申请日：2020-03-01
发明人： Su Bin Kim , Se Byung Chae
IPC分类号： G09G5/10
摘要： A display device including a display unit including a scan line, a data line, and a pixel, a gate driver supplying a scan signal, and a source driver supplying a data voltage, in which the source driver includes a gamma voltage generator generating different gamma voltages in response to a gamma enable signal, a digital-to-analog converter generating the data voltage corresponding to a gray scale value using the gamma voltages, and a source buffer outputting the data voltage, the gamma voltage generator includes a first resistor string setting a range of the gamma voltages, gamma buffers outputting selected voltages among divided voltages within the voltage range, and a second resistor string including tabs to divide a voltage between the tabs to generate the gamma voltages, and at least some of the gamma buffers are turned on in a first period and are turned off in a second period.
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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：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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公开(公告)号：US12118959B2
公开(公告)日：2024-10-15
申请号：US18136299
申请日：2023-04-18
发明人： Su Bin Kim , Se Byung Chae
IPC分类号： G09G5/10 , G09G3/20 , G09G3/3275 , G09G3/36 , G06F1/3234 , G09G3/3208
CPC分类号： G09G5/10 , G06F1/3265 , G09G3/2007 , G09G3/3208 , G09G3/3275 , G09G3/3696 , G09G2310/0267 , G09G2310/027 , G09G2310/0291 , G09G2310/061 , G09G2310/08 , G09G2320/0276 , G09G2320/0673 , G09G2330/021 , G09G2330/022 , G09G2330/028 , G09G2340/0435
摘要： A display device including a display panel including a scan line, a data line, and a pixel connected thereto, a gate driver, and a source driver including a gamma voltage generator to generate gamma voltages having different voltage levels, a digital-to-analog converter to generate the data voltage corresponding to a gray scale value using the gamma voltages, and a source buffer, in which the gamma voltage generator includes a first resistor string to set a voltage range of the gamma voltages, a second resistor string to set tab gamma voltages corresponding to some of the gamma voltages within the voltage range, gamma buffers to output the tab gamma voltages, and a third resistor string including tabs respectively connected to output terminals of the gamma buffers, the third resistor string being configured to divide a voltage between the tabs to generate the gamma voltages.
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公开(公告)号：US11037479B2
公开(公告)日：2021-06-15
申请号：US16812059
申请日：2020-03-06
发明人： Se Byung Chae , Su Bin Kim
IPC分类号： G09G3/20
摘要： A source driver includes a gamma voltage generator to generate gamma voltages having mutually different voltage levels, a digital-to-analog converter to generate a data voltage corresponding to a grayscale value using the gamma voltages, an output buffer unit to output the data voltage, and a chopping controller to generate a chopping control signal, and to provide the chopping control signal to the output buffer unit. The output buffer unit includes an amplifier connected to an output terminal of the digital-to-analog converter, and a chopping circuit to periodically change a polarity of an offset of the amplifier in response to the chopping control signal. The chopping controller is to change a slew rate of the chopping control signal.
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