US 12,131,711 B2
Data processing method, data processing device, and display apparatus with a backlight module using an optical diffusion coefficient
Xitong Ma, Beijing (CN)
Assigned to BOE TECHNOLOGY GROUP CO., LTD., Beijing (CN)
Appl. No. 17/797,276
Filed by BOE TECHNOLOGY GROUP CO., LTD., Beijing (CN)
PCT Filed Jun. 9, 2021, PCT No. PCT/CN2021/099224
§ 371(c)(1), (2) Date Aug. 3, 2022,
PCT Pub. No. WO2022/022093, PCT Pub. Date Feb. 3, 2022.
Claims priority of application No. 202010763507.8 (CN), filed on Jul. 31, 2020.
Prior Publication US 2023/0059152 A1, Feb. 23, 2023
Int. Cl. G09G 3/34 (2006.01)
CPC G09G 3/3426 (2013.01) [G09G 2320/0233 (2013.01); G09G 2320/0276 (2013.01); G09G 2320/0626 (2013.01); G09G 2330/021 (2013.01); G09G 2360/16 (2013.01)] 15 Claims
OG exemplary drawing
 
1. A data processing method applied to a display apparatus, wherein the display apparatus includes a display panel and a backlight module disposed opposite to each other, the display panel includes a plurality of pixels, the backlight module has a plurality of backlight units, and each backlight unit corresponds to at least two pixels; the data processing method comprising:
obtaining first image data, the first image data including first pixel values of the plurality of pixels;
obtaining a brightness control value of each backlight unit according to first pixel values of pixels corresponding to the backlight unit;
determining relative positional relationships between a first pixel and at least two first backlight units in a plane perpendicular to a thickness direction of the display apparatus, wherein the relative positional relationships each include a reference distance and a reference angle, the first pixel is any pixel of the plurality of pixels, the at least two first backlight units include a backlight unit corresponding to the first pixel and at least one backlight unit adjacent thereto, and the backlight unit corresponding to the first pixel and the at least one backlight unit adjacent thereto are arranged consecutively, the at least two first backlight units overlap with a brightness diffusion region;
determining directly an optical diffusion coefficient of each first backlight unit at a corresponding position of the first pixel according to the relative positional relationships; and
determining a backlight brightness characteristic value of the first pixel according to a brightness control value of each first backlight unit and the optical diffusion coefficient of each first backlight unit at the corresponding position of the first pixel;
wherein obtaining the brightness control value of each backlight unit according to the first pixel values of the pixels corresponding to the backlight unit includes:
determining J times an average pixel value of the backlight unit to obtain the brightness control value of the backlight unit, the average pixel value of the backlight unit being an average value of the first pixel values of the pixels corresponding to the backlight unit, and J being greater than 1 and less than or equal to 2;
wherein obtaining the first image data includes:
receiving third image data; and
performing gamma correction on the third image data to obtain the first image data;
the data processing method further comprising:
obtaining a second pixel value of the first pixel according to a first pixel value of the first pixel and the backlight brightness characteristic value of the first pixel, including:
determining the second pixel value of the first pixel according to formula

OG Complex Work Unit Math
 wherein P2 is the second pixel value of the first pixel, P1 is the first pixel value of the first pixel, BLMAX is a maximum backlight brightness driving value of the backlight unit corresponding to the first pixel, N is a ratio parameter, N is greater than 1, BLP is the backlight brightness characteristic value of the first pixel, and γ is a gamma value of the gamma correction.