公开(公告)号：US11176876B1

公开(公告)日：2021-11-16

申请号：US17151601

申请日：2021-01-18

Applicant: Samsung Display Co., Ltd.

Inventor： Hyo Jin Lee ,  Hong Soo Kim ,  Jin Young Roh ,  Se Hyuk Park ,  Jae Keun Lim

IPC: G09G3/32

Abstract: A display device includes the following elements: a display panel including a first pixel emitting first-color light, a second pixel emitting second-color light, and a third pixel emitting third-color light; a controller generating generated image data based on input image data according to a driving frequency of the display panel, and generating output image data using the generated image data; and a data driver supplying data signals to the display panel based on the output image data. The input image data includes first, second, and third grayscales for the first, second, and third pixels, respectively. The generated image data includes first, second, and third generated grayscales for the first, second, and third pixels, respectively, with different ratios to the first, second, and third grayscales, respectively.

公开(公告)号：US11151924B2

公开(公告)日：2021-10-19

申请号：US16828726

申请日：2020-03-24

Applicant: Samsung Display Co., Ltd.

Inventor： Jinyoung Roh ,  Sangan Kwon ,  Sehyuk Park ,  Hyo Jin Lee ,  HongSoo Kim ,  Sukhun Lee

IPC: G09G5/393 ,  G09G3/20

Abstract: A display driver includes a still image detector configured to receive a compressed image bitstream at an input frame frequency from a host processor, and to detect a still image by comparing the compressed image bitstream of a current frame and the compressed image bitstream of a previous frame, a driving frequency changer configured to output the compressed image bitstream at a first output frame frequency equal to the input frame frequency when the still image is not detected, and to output the compressed image bitstream at a second output frame frequency lower than the input frame frequency when the still image is detected, and a decoder configured to generate original image data at the first output frame frequency and the second output frame frequency.

公开(公告)号：US11069295B2

公开(公告)日：2021-07-20

申请号：US16579476

申请日：2019-09-23

Applicant: Samsung Display Co., Ltd.

Inventor： Hui Nam ,  Hyo Jin Lee ,  Jinyoung Roh ,  Sehyuk Park

IPC: G09G3/3258 ,  G09G3/3266 ,  G09G3/3291

Abstract: A display apparatus includes a display panel, a gate driver, a data driver and an emission driver. The display panel includes a pixel. The gate driver outputs a data write gate signal having a corresponding active level and a data initialization gate signal having a corresponding active level to the pixel in a writing frame, outputs the data write gate signal not having the corresponding active level and the data initialization gate signal not having the corresponding active level to the pixel in a holding frame and outputs the data write gate signal having the corresponding active level and the data initialization gate signal not having the corresponding active level to the pixel in a writing compensation frame. The data driver outputs a data voltage to the pixel. The emission driver outputs an emission signal to the pixel.

公开(公告)号：US10770001B2

公开(公告)日：2020-09-08

申请号：US16542125

申请日：2019-08-15

Applicant: Samsung Display Co., Ltd.

Inventor： Se Hyuk Park ,  Hui Nam ,  Hyo Jin Lee

IPC: G09G3/3258 ,  G09G3/3266 ,  G09G3/3275

Abstract: A flicker quantification system includes a display device driven in units of reference periods having a first frame for writing data and at least one second frame for holding data. A luminance measurer generates luminance data by measuring a luminance of a display during the reference period. A voltage measurer measures a voltage of a photo sensor corresponding to light emitted. First voltage data representing an accumulation amount of voltage during the first frame and second voltage data representing an accumulation amount of voltage during the at least one second frame is generated. A processor calculates a flicker index value representing a ratio of a measured luminance difference to a just noticeable difference, based on the luminance data, the first voltage data, and the second voltage data. The measured luminance difference may represent the difference between a luminance during the first frame and a luminance during the second frame.