公开(公告)号：US20180158173A1

公开(公告)日：2018-06-07

申请号：US15711831

申请日：2017-09-21

Applicant: Apple Inc.

Inventor： Shengkui GAO ,  Hung Sheng LIN ,  Hyunsoo KIM ,  Hyunwoo NHO ,  Katherine W. SONG ,  Mohammad HAJIROSTAM ,  Myung-Je CHO ,  Rui ZHANG ,  Sang Y. YOUN ,  Wei H. YAO ,  Yafei BI

IPC: G06T3/40 ,  G06T5/00 ,  G06T7/00 ,  G06T7/90

CPC classification number: G06T3/40 ,  G06T5/001 ,  G06T5/009 ,  G06T7/0002 ,  G06T7/90

Abstract: A display device may include a display having a pixels and a processor. The processor may receive image data, determine a digital offset value for a pixel based on a location of the pixel, such that the digital offset value compensates for one or more non-uniformity properties of the pixel. The processor may determine a scale factor associated with the pixel based on at least two of a luminance setting for the display, a driving mode of the display, and a gray level value for the pixel. The processor may then generate correction image data by applying the scale factor to the digital offset value, generate compensated image data based on the correction image data and the image data, and provide the compensated image data to the display.

公开(公告)号：US20170358255A1

公开(公告)日：2017-12-14

申请号：US15438448

申请日：2017-02-21

Applicant: Apple Inc.

Inventor： Chaohao WANG ,  Paolo SACCHETTO ,  Sheng ZHANG ,  Yang LI ,  Myung-Je CHO ,  Marc ALBRECHT

IPC: G09G3/20

CPC classification number: G09G3/2055 ,  G09G3/2022 ,  G09G2320/0247 ,  G09G2320/0666

Abstract: This application relates to performing certain dithering processes to eliminate display artifacts such as flicker, which can be caused by charge accumulation at the display. The dither process can be performed by a display controller that uses a group lookup method for identifying groups of dithering patterns that can be combined to expand a number of color values available to the display. The dither process can also be performed as a temporal process that incorporates groups of dithering patterns into frames and shifts a spatial arrangement of the groups of dithering patterns over a sequence of frames. Additionally, the dither process can incorporate counters that count the number of times a particular spatial arrangement of dithering patterns has been used in a sequence of frames in order that each spatial arrangement of dithering patterns will share an average count with other spatial arrangements over a sequence of frames.