公开(公告)号：US20230015271A1

公开(公告)日：2023-01-19

申请号：US17958126

申请日：2022-09-30

Applicant: SAMSUNG DISPLAY CO., LTD.

Inventor： Se Byung CHAE ,  Su Bin KIM ,  Jin Young JEON

IPC: G09G3/20 ,  G09G3/32

Abstract: 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.

公开(公告)号：US20220358884A1

公开(公告)日：2022-11-10

申请号：US17736040

申请日：2022-05-03

Applicant: Samsung Display Co., Ltd.

Inventor： Se Byung CHAE ,  Seung Kyu LEE

IPC: G09G3/3266 ,  G09G3/3275

Abstract: 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.

公开(公告)号：US20200286417A1

公开(公告)日：2020-09-10

申请号：US16812059

申请日：2020-03-06

Applicant: Samsung Display Co., Ltd.

Inventor： Se Byung CHAE ,  Su Bin KIM

IPC: G09G3/20

Abstract: 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.

公开(公告)号：US20230306916A1

公开(公告)日：2023-09-28

申请号：US18124975

申请日：2023-03-22

Applicant: SAMSUNG DISPLAY CO., LTD.

Inventor： Se Byung CHAE

IPC: G09G3/3291 ,  G09G3/3233

CPC classification number: G09G3/3291 ,  G09G3/3233 ,  G09G2310/027 ,  G09G2310/0291 ,  G09G2320/02 ,  G09G2300/0819 ,  G09G2300/0842 ,  G09G2300/0861

Abstract: A display device includes: a pixel which emits light at a luminance corresponding to a data voltage applied thereto; and a data driver which supplies the data voltage to the pixel. The data driver includes: a first amplifier which outputs a first reference voltage; a first booster circuit including an input terminal connected to a first input terminal of the first amplifier, and an output terminal connected to a second input terminal of the first amplifier; a second amplifier which outputs a second reference voltage; a resistance string which receives the first and second reference voltages, and generate gamma voltages which are intermediate voltages between the first and second reference voltages; a digital-analog converter which outputs a gamma voltage corresponding to a gray scale of the pixel among the gamma voltages; and a source amplifier which outputs the gamma voltage as the data voltage.

公开(公告)号：US20230177995A1

公开(公告)日：2023-06-08

申请号：US18160265

申请日：2023-01-26

Applicant: SAMSUNG DISPLAY CO., LTD.

Inventor： Hyun Chang KIM ,  Se Byung CHAE

IPC: G09G3/20

CPC classification number: G09G3/20 ,  G09G2310/08 ,  G09G2310/0267 ,  G09G2310/0275

Abstract: 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.

公开(公告)号：US20220351703A1

公开(公告)日：2022-11-03

申请号：US17694624

申请日：2022-03-14

Applicant: Samsung Display Co, Ltd.

Inventor： Su Bin KIM ,  Se Byung CHAE

IPC: G09G5/10

Abstract: 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.

公开(公告)号：US20220223082A1

公开(公告)日：2022-07-14

申请号：US17412609

申请日：2021-08-26

Applicant: SAMSUNG DISPLAY CO., LTD.

Inventor： Hyun Chang KIM ,  Se Byung CHAE

IPC: G09G3/20

Abstract: 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.

公开(公告)号：US20220199011A1

公开(公告)日：2022-06-23

申请号：US17693025

申请日：2022-03-11

Applicant: Samsung Display Co., Ltd.

Inventor： Ji Hyun KA ,  Tae Hoon KWON ,  Ki Myeong EOM ,  Chung YI ,  Se Byung CHAE ,  Deok Jun CHOI ,  Moon Sang HWANG

IPC: G09G3/3225 ,  G09G3/3275

Abstract: 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.

公开(公告)号：US20200286448A1

公开(公告)日：2020-09-10

申请号：US16805804

申请日：2020-03-01

Applicant: Samsung Display Co., Ltd.

Inventor： Su Bin KIM ,  Se Byung CHAE

IPC: G09G5/10

Abstract: 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.

公开(公告)号：US20160155387A1

公开(公告)日：2016-06-02

申请号：US14680518

申请日：2015-04-07

Applicant: SAMSUNG DISPLAY CO., LTD.

Inventor： Cheol Min KIM ,  Hyung ryul KANG ,  Se Byung CHAE

IPC: G09G3/32

CPC classification number: G09G3/3291 ,  G09G3/2092 ,  G09G2300/0852 ,  G09G2300/0861 ,  G09G2310/0251 ,  G09G2310/0262 ,  G09G2310/0297 ,  G09G2320/043

Abstract: 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.

Abstract translation: 有机发光显示器包括多个像素行组，扫描驱动器，数据驱动器和数据分配器。 每个像素组包括相同数量的像素行，并且像素行组被依次驱动。 数据分配器将用于输入到像素中的数据信号解复用。 在每个像素行组中的像素基本相同的时间执行阈值电压补偿之后，将数据信号输入到像素。 将数据信号输入到一个像素行组中的像素，同时对与该像素行组相邻的另一个像素行组中的像素进行阈值电压补偿。