公开(公告)号：US11232736B1

公开(公告)日：2022-01-25

申请号：US17313347

申请日：2021-05-06

Applicant: SAMSUNG DISPLAY CO., LTD.

Inventor： Se Yun Kim ,  Min Gyu Kim ,  Sang Cheol Park

IPC: G09G3/20

Abstract: A mura compensation method for a display device in which a data driver and a scan driver disposed at a first side of a pixel unit, includes capturing an image of the pixel unit based on a predetermined first sample gray level; calculating mum luminance of diagonal mura corresponding to the first sample gray level by sharpening the diagonal mura based on light components of the captured image for a first sample area including the diagonal mura; calculating target luminance based on the mura luminance and a luminance distribution of the imaged first sample area; and calculating a first compensation value corresponding to the first sample gray level and a pixel corresponding to the diagonal mura in the first sample area by using the first sample gray level, the mura luminance, and the target luminance.

公开(公告)号：US10991346B2

公开(公告)日：2021-04-27

申请号：US16855953

申请日：2020-04-22

Applicant: Samsung Display Co., Ltd.

Inventor： Jeong Woon Lee ,  Min Gyu Kim ,  Sang Cheol Park ,  Hoi Sik Moon

IPC: G09G5/393 ,  G09G3/20

Abstract: A controller includes a bit shifter and a stain compensator. The bit shifter may determine a bit shift value corresponding to a stain compensation value according to an area of a display panel. The bit shift value represents a quantity of integer bits and a quantity of decimal bits. At least one of the quantity of integer bits and the quantity of decimal bits corresponds to a quantity of stain compensation steps. The stain compensator may compensate a grayscale value of input image data using the stain compensation value and the bit shift value to generate compensated image data.