公开(公告)号：US20220148528A1

公开(公告)日：2022-05-12

申请号：US17521274

申请日：2021-11-08

Applicant: Shanghai Tianma Micro-Electronics Co., Ltd.

Inventor： Kouichi OOGA

IPC: G09G3/34

Abstract: Disclosed is a method of controlling a backlight for of a display panel. The backlight includes backlight blocks. The display panel includes display region blocks opposite to the backlight blocks in one-to-one correspondence. The method determines, for each of the backlight blocks, a luminance value demanded from each of pixels in display region blocks including a display region block opposite to the backlight block and one or more display region blocks adjacent to the opposite display region block to the backlight block based on a luminance value of the pixel and a weight determined depending on a relation of a location of the pixel and a location of the backlight block. The method determines, for each of the backlight blocks, a highest value among the demanded luminance values for the backlight block to be a luminance value for the backlight block.

公开(公告)号：US20230139266A1

公开(公告)日：2023-05-04

申请号：US17979135

申请日：2022-11-02

Applicant: Shanghai Tianma Micro-Electronics Co., Ltd.

Inventor： Kouichi OOGA

IPC: G09G3/34

Abstract: A controller acquires video data, determines provisional luminance values for backlight blocks based on the video data, determines an adjustment coefficient for a backlight block of interest selected from the backlight blocks, determines an adjusted luminance value for the backlight block of interest based on the provisional luminance value and the adjustment coefficient for the backlight block of interest, and controls the backlight block of interest in accordance with the adjusted luminance value. In determining the adjustment coefficient, the controller calculates a statistic of provisional luminance values for reference backlight blocks including backlight blocks adjacent to the backlight block of interest, calculates a relative value of the statistic with respect to the provisional luminance value for the backlight block of interest, and determines the adjustment coefficient for the backlight block of interest based on the relative value and a predefined function.

公开(公告)号：US20220165224A1

公开(公告)日：2022-05-26

申请号：US17526035

申请日：2021-11-15

Applicant: Shanghai Tianma Micro-Electronics Co., Ltd.

Inventor： Kouichi OOGA

IPC: G09G3/34 ,  G09G3/36

Abstract: A method of controlling a backlight of a display device is disclosed. The display device includes a display panel and the backlight. The backlight includes a plurality of backlight blocks. The method determines provisional luminance values for the plurality of backlight blocks in accordance with an input video frame. The method adjusts the provisional luminance values by amounts of reduction based on a total sum of the provisional luminance values and individual provisional luminance values.