公开(公告)号：US20240021155A1

公开(公告)日：2024-01-18

申请号：US18119513

申请日：2023-03-09

Applicant: Samsung Display Co., Ltd.

Inventor： MOONSANG HWANG

IPC: G09G3/3233 ,  G09G3/3266 ,  G09G3/3275

CPC classification number: G09G3/3233 ,  G09G3/3266 ,  G09G3/3275 ,  G09G2310/0297 ,  G09G2300/0439 ,  G09G2300/0842 ,  G09G2300/0819 ,  G09G2300/0452 ,  G09G2360/14 ,  G09G2320/0285 ,  G09G2310/0291

Abstract: A display device includes: a display panel which includes a plurality of display areas having different pixel densities from each other, where each of the display areas includes a plurality of pixels; a gate driver, which provides a first gate signal and a second gate signal to each of the pixels; and a data driver, which provides data voltages to the pixels in an address-scan period and provides different bias voltages to the display areas, respectively, in a self-scan period following the address-scan period.

公开(公告)号：US20230186832A1

公开(公告)日：2023-06-15

申请号：US17968571

申请日：2022-10-18

Applicant: Samsung Display Co., Ltd.

Inventor： KYOUNGJU SHIN ,  DOHYUN KANG ,  YANGSOO KIM ,  JUNGKOOK PARK ,  MOONSANG HWANG

IPC: G09G3/32

CPC classification number: G09G3/32 ,  G09G2300/0426 ,  G09G2310/0278 ,  G09G2300/0842 ,  G09G2320/0626

Abstract: A pixel circuit includes a light emitting element, a driving transistor, a first emission transistor applying a first power voltage to the driving transistor in response to a first emission signal, a second emission transistor applying the driving current to the light emitting element in response to a second emission signal, a first initialization transistor applying a first initialization voltage to an anode electrode of the light emitting element in response to the second emission signal, a data write transistor, a compensation transistor, a second initialization transistor, and a storage capacitor. A first off-duty ratio which is a ratio of a high voltage level period of the first emission signal in one frame is determined according to a set luminance level, and a second off-duty ratio which is a ratio of a high voltage level period of the second emission signal in the one frame is fixed.

公开(公告)号：US20240013730A1

公开(公告)日：2024-01-11

申请号：US18321099

申请日：2023-05-22

Applicant: Samsung Display Co., LTD.

Inventor： MOONSANG HWANG ,  KYOUNGJU SHIN

IPC: G09G3/3266 ,  G09G3/3233

CPC classification number: G09G3/3266 ,  G09G3/3233 ,  G09G2300/0819 ,  G09G2300/0842 ,  G09G2340/04 ,  G09G2310/0291 ,  G09G2310/08 ,  G09G2320/045 ,  G09G2330/021

Abstract: A display device includes a display panel including pixels, and a first gate driver including first stages that output first carry signals, respectively, and first buffers that output first gate signals, respectively, and providing the first gate signals to the pixels. In case that the display panel includes a first display area and a second display area, the pixels disposed in the first display area are driven at a first frequency, and the pixels disposed in the second display area are driven at a second frequency; a first gate signal among the first gate signals output from a first buffer corresponding to the first display area is provided to the pixels disposed in the first display area, a first buffer corresponding to the second display area does not output the first gate signal, and the first gate signal is not provided to the pixels disposed in the second display area.

公开(公告)号：US20230316979A1

公开(公告)日：2023-10-05

申请号：US18156536

申请日：2023-01-19

Applicant: SAMSUNG DISPLAY CO., LTD.

Inventor： MOONSANG HWANG ,  Donghak Pyo

IPC: G09G3/20 ,  G09G3/3233

CPC classification number: G09G3/2007 ,  G09G3/3233 ,  G09G2320/0276 ,  G09G2360/16 ,  G09G2320/0693 ,  G09G2330/12

Abstract: The gamma correction method for a display device measures a first driving current according to a first grayscale voltage corresponding to the low grayscale value, determines a predicted luminance based on a driving current-luminance calibration function and the first driving current, compares the predicted luminance and a first target luminance for the low grayscale value, determines a first offset value based on the first driving current and the first target luminance when the predicted luminance is different from the first target luminance, and corrects the first grayscale voltage based on the first offset value. That is, the gamma correction method may measure the driving current to perform gamma correction for the low grayscale value, and shorten a process time of the gamma correction compared to performing the gamma correction for the low grayscale value by measuring luminance.