Image display processing method and device thereof, display device and storage medium

Patent metadata

Field	Value
Publication number	US-10984736-B2
Application number	US-201916391892-A
Country	US
Kind code	B2
Filing date	Apr 23, 2019
Priority date	Jul 20, 2018
Publication date	Apr 20, 2021
Grant date	Apr 20, 2021

Abstract

An image display processing method for a display device, an image display processing device, a display device and a storage medium are provided. The display device includes a backlight unit, the backlight unit includes a plurality of backlight blocks and is driven by a local dimming mode, and the image display processing method includes: acquiring a regional eigenvalue of each backlight block of an (n)th frame image and a regional eigenvalue of each backlight block of an (n−1)th frame image; and performing a peak driving processing on a backlight luminance of each backlight block of the (n)th frame image, based on a preset threshold, the regional eigenvalue of each backlight block of the (n)th frame image and the regional eigenvalue of each backlight block of the (n−1)th frame image, so as to acquire an adjusted backlight luminance of each backlight block of the (n)th frame image.

First claim

What is claimed is:

1. An image display processing method for a display device, wherein the display device comprises a backlight unit, the backlight unit comprises a plurality of backlight blocks and is driven by a local dimming mode, and the image display processing method comprises:
acquiring a regional eigenvalue of each backlight block of an (n)th frame image and a regional eigenvalue of each backlight block of an (n-1)th frame image;
performing a peak driving processing on a backlight luminance of each backlight block of the (n)th frame image, based on a preset threshold, the regional eigenvalue of each backlight block of the (n)th frame image, and the regional eigenvalue of each backlight block of the (n-1)th frame image, so as to acquire an adjusted backlight luminance of each backlight block of the (n)th frame image; and
displaying the (n)th frame image based on the adjusted backlight luminance of each backlight block of the (n)th frame image,
wherein n is an integer greater than 1;
wherein performing the peak driving processing on the backlight luminance of each backlight block of the (n)th frame image based on the preset threshold, the regional eigenvalue of each backlight block of the (n)th frame image and the regional eigenvalue of each backlight block of the (n-1)th frame image so as to acquire the adjusted backlight luminance of each backlight block of the (n)th frame image comprises:
judging whether a regional eigenvalue of an (i, j)th backlight block of the (n)th frame image is greater than the preset threshold;
judging whether the regional eigenvalue of the (i, j)th backlight block of the (n)th frame image is equal to a regional eigenvalue of an (i, j)th backlight block of the (n-1)th frame image; and
in a case where the regional eigenvalue of the (i, j)th backlight block of the (n)th frame image is greater than the preset threshold, and the regional eigenvalue of the (i, j)th backlight block of the (n)th frame image is unequal to the regional eigenvalue of an (i, j)th backlight block of the (n-1)th frame image, performing a peak driving processing on a backlight luminance of the (i, j)th backlight block of the (n)th frame image, so as to acquire an adjusted backlight luminance of the (i, j)th backlight block of the (n)th frame image, otherwise, not performing the peak driving processing on the backlight luminance of the (i, j)th backlight block of the (n)th frame image,
wherein 1≤i≤I, 1≤j≤J, I and J are integers greater than 1, and I and J respectively represent a row number and a column number of an array in which the plurality of backlight blocks are arranged.

2. The image display processing method according to claim 1 , wherein the adjusted backlight luminance is expressed as:

L

1
⁢

(
n
)

⁡

(

i
,
j

)

=

(

1
+
A

)

*

G

(
n
)

⁡

(

i
,
j

)

Hm

*

L
max

,

where L 1(n) (i, j) represents an adjusted backlight luminance of an (i, j)th backlight block of the (n)th frame image, A represents a backlight luminance adjustment coefficient, G (n) (i, j) represents a regional eigenvalue of the (i, j)th backlight block of the (n)th frame image, Hm represents a highest grayscale value, and L max represents a backlight luminance corresponding to the highest grayscale value.

3. The image display processing method according to claim 1 , wherein in a case where the peak driving processing is not performed on the backlight luminance of the (i, j)th backlight block of the (n)th frame image, a backlight luminance corresponding to the regional eigenvalue of the (i, j)th backlight block of the (n)th frame image is expressed as:

L

2
⁢

(
n
)

⁡

(

i
,
j

)

=

G

(
n
)

⁡

(

i
,
j

)

Hm

*

L
max

,

where L 2(n) (i, j) represents the backlight luminance of the (i, j)th backlight block of the (n)th frame image without the peak driving processing, G (n) (i, j) represents the regional eigenvalue of the (i, j)th backlight block of the (n)th frame image, Hm represents a highest grayscale value, and L max represents a backlight luminance corresponding to the highest grayscale value Hm.

4. The image display processing method according to claim 1 , wherein displaying the (n)th frame image based on the adjusted backlight luminance of each backlight block of the (n)th frame image comprises:
obtaining a backlight diffusion model by fitting based on the adjusted backlight luminance of each backlight block, and acquiring an actual backlight luminance of each pixel in each backlight block based on the backlight diffusion model;
compensating display data of the display device according to the actual backlight luminance, so as to obtain compensated display data; and
displaying the (n)th frame image by using the compensated display data and the actual backlight luminance.

5. The image display processing method according to claim 1 , wherein the regional eigenvalue of an (i

Assignees

• Boe Technology Group Co Ltd

Inventors

• Xi Yanhui
• Chen Ming
• Zhang Xiaomang
• Sun Yan
• Dai Bin
• Ji Zhihua
• Shi Tiankuo
• Bi Yuxin
• Shi Lingyun

Classifications

• G09G3/3426 Primary

  the different display panel areas being distributed in two dimensions, e.g. matrix · CPC title

• G09G2360/16

  Calculation or use of calculated indices related to luminance levels in display data · CPC title

• G09G2320/0646

  Modulation of illumination source brightness and image signal correlated to each other · CPC title

• G09G2330/021

  Power management, e.g. power saving · CPC title

• G09G3/342 Primary

  using several illumination sources separately controlled corresponding to different display panel areas, e.g. along one dimension such as lines · CPC title