# US 10,872,558 B2 · Image display processing method and device, display device and non-volatile storage medium

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- Number: US 10,872,558 B2
- Document ID: US10872558B2
- Status: Granted
- Kind: B2
- Application number: 16/410,452
- Filed: 2019-05-13
- Published: 2019-11-21
- Granted: 2020-12-22
- Earliest claimed: 2018-05-18
- Assignees: Beijing Boe Optoelectronics Technology Co., Ltd.; Boe Technology Group Co., Ltd.
- Applicants: Beijing Boe Optoelectronics Technology Co., Ltd.; Boe Technology Group Co., Ltd.
- Inventors: Zhihua Ji; Tiankuo Shi; Yilang Sun; Xiaomang Zhang; Yanhui Xi; Lingyun Shi; Wenyu Li
- Web page: https://patentgrep.com/patent/US10872558B2

## CPC

- G09G 3/32: semiconductive, e.g. using light-emitting diodes [LED]
- G09G 3/3426: {the different display panel areas being distributed in two dimensions, e.g. matrix}
- G02F 1/133603: {with LEDs}
- G09G 2310/0264: Details of driving circuits
- G09G 2320/0626: for control of overall brightness
- G09G 2320/0646: Modulation of illumination source brightness and image signal correlated to each other
- G09G 2330/021: Power management, e.g. power saving
- G09G 2360/16: Calculation or use of calculated indices related to luminance levels in display data
- G09G: ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION (arrangements for transferring data between digital computers and displays G06F3/14; static indicating arrangements comprising an association of a number of separate sources or light control cells G09F9/00; static indicating arrangements comprising integral associations of a number of light sources H01J, H01K, H10H, H05B33/12; scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission, details thereof H04N1/00)
- G02F: OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS

## Abstract

An image display processing method for a display device, an image display processing device, a display device, and a non-volatile storage medium are provided. The display device includes a backlight unit, and the backlight unit includes a plurality of display backlight blocks and is configured to be driven by a local dimming mode. The image display processing method includes: obtaining a peak driving threshold of an (s−1)-th frame of image based on respective backlight values of the plurality of backlight blocks of the (s−1)-th frame of image after a first local dimming process is performed on the (s−1)-th frame of image; obtaining respective adjusted backlight values of the plurality of backlight blocks of the s-th frame of image; and displaying the s-th frame of image by using the respective adjusted backlight values of the plurality of backlight blocks of the s-th frame of image.

## Claims

### Claim 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 configured to be driven by a local dimming mode, and the image display processing method comprises:
obtaining a peak driving threshold of an (s-1)-th frame of image based on respective backlight values of the plurality of backlight blocks of the (s-1)-th frame of image after a first local dimming process is performed on the (s-1)-th frame of image;
acquiring respective initial backlight values of the plurality of backlight blocks of an s-th frame of image, and performing a peak driving process on the respective initial backlight values of the plurality of backlight blocks of the s-th frame of image based on the peak driving threshold of the (s-1)-th frame of image, so as to obtain respective adjusted backlight values of the plurality of backlight blocks of the s-th frame of image; and
displaying the s-th frame of image by using the respective adjusted backlight values of the plurality of backlight blocks of the s-th frame of image, wherein s is an integer greater than 1;
the method further comprises:
acquiring a maximum backlight value of the plurality of backlight blocks of the (s-1)-th frame of image;
judging whether the maximum backlight value of the plurality of backlight blocks of the (s-1)-th frame of image is greater than or equal to a preset threshold; and
judging whether a total backlight power consumption of the (s-1)-th frame of image is less than a conventional backlight power consumption,
wherein in a case where the maximum backlight values of the respective backlight blocks of the (s-1)-th frame of image is great than or equal to the preset threshold and the total backlight power consumption of the (s-1)-th frame of image is less than the conventional backlight power consumption, obtaining the peak driving threshold of the (s-1)-th frame of image based on the backlight values of the respective backlight blocks of the (s-1)-th frame of image after the first local dimming process is performed on the (s-1)-th frame of image is performed, and otherwise, the peak driving process on the respective initial backlight values of the plurality of backlight blocks of the s-th frame of image is not performed.

### Claim 2 (depends on 1)

The image display processing method according to claim 1, wherein obtaining the peak driving threshold of the (s-1)-th frame of image based on the respective backlight values of the plurality of backlight blocks of the (s-1)-th frame of image after the first local dimming process is performed on the (s-1)-th frame of image comprises:
acquiring a backlight power consumption margin of the (s-1)-th frame of image based on the respective backlight values of the plurality of backlight blocks of the (s-1)-th frame of image after the first local dimming process is performed on the (s-1)-th frame of image; and
acquiring the peak driving threshold of the (s-1)-th frame of image based on the backlight power consumption margin of the (s-1)-th frame of image.

### Claim 3 (depends on 2)

The image display processing method according to claim 2, wherein acquiring the backlight power consumption margin of the (s-1)-th frame of image based on the respective backlight values of the plurality of backlight blocks of the (s-1)-th frame of image after the first local dimming process is performed on the (s-1)-th frame of image comprises:
acquiring a total backlight power consumption of the (s-1)-th frame of image based on the respective backlight values of the plurality of backlight blocks of the (s-1)-th frame of image after the first local dimming process is performed on the (s-1)-th frame of image.

### Claim 4 (depends on 3)

The image display processing method according to claim 3, wherein acquiring the backlight power consumption margin of the (s-1)-th frame of image based on the respective backlight values of the plurality of backlight blocks of the (s-1)-th frame of image after the first local dimming process is performed on the (s-1)-th frame of image further comprises:
acquiring the backlight power consumption margin of the (s-1)-th frame of image based on the total backlight power consumption of the (s-1)-th frame of image and the conventional backlight power consumption of the backlight unit.

### Claim 5 (depends on 2)

The image display processing method according to claim 2, wherein acquiring the peak driving threshold of the (s-1)-th frame of image based on the backlight power consumption margin of the (s-1)-th frame of image comprises:
arranging the respective backlight values of the plurality of backlight blocks of the (s-1)-th frame of image in an ascending order to obtain a first sequence, and
acquiring the peak driving threshold of the (s-1)-th frame of image according to a following formula:
∑
x
=
G
b
⁢
⁢
1
⁢
_
⁢
⁢
m
⁢
⁢
ax
⁢
(
K
-
1
)
⁢
L
⁡
(
x
)
×
N
⁡
(
x
)
≤
M
⁡
(
s
)
,
and
∑
x
=
G
-
1
b
⁢
⁢
1
⁢
_
⁢
⁢
ma
⁢
⁢
x
⁢
(
K
-
1
)
⁢
L
⁡
(
x
)
×
N
⁡
(
x
)
>
M
⁡
(
s
)
,
where K represents a peak driving adjustment coefficient, G represents a serial number of each of the respective backlight values in the first sequence, M(s) represents the backlight power consumption margin of the (s-1)-th frame of image, L(x) represents a backlight value with a serial number x in the respective backlight values of the plurality of backlight blocks of the (s-1)-th frame of image, N(x) represents a number of backlight blocks of which the backlight value is L(x) in the plurality of backlight blocks of the (s-1)-th frame of image, and bl max represents a serial number of a maximum backlight value of the plurality of backlight blocks of the (s-1)-th frame of image in the first sequence.

### Claim 6 (depends on 5)

The image display processing method according to claim 5, wherein the backlight power consumption margin of the (s-1)-th frame of image is expressed as:
M(s)=PW(SD)−PWs−1(LD),
where PWs−1(LD) represents a total backlight power consumption of the (s-1)-th frame of image, and PW(SD) represents the conventional backlight power consumption of the backlight unit.

### Claim 7 (depends on 6)

The image display processing method according to claim 6, wherein the total backlight power consumption of the (s-1)-th frame of image is expressed as:
PW
s
-
1
⁡
(
LD
)
=
∑
i
=
1
I
⁢
∑
j
=
1
J
⁢
B
s
-
1
⁡
(
i
,
j
)
,
where Bs−1(i, j) represents a backlight value of an (i, j)-th backlight block of the (s-1)-th frame of image, 1<i<I, 1<j<J, and I and J respectively represent a number of rows and a number of columns of an array in which the plurality of backlight blocks are arranged and are both integers greater than 1.

### Claim 8 (depends on 7)

The image display processing method according to claim 7, wherein Bs−1(i, j) is obtained according to grayscales of a plurality of pixels corresponding to the (i, j)-th backlight block of the (s-1)-th frame of image.

### Claim 9 (depends on 8)

The image display processing method according to claim 8, wherein the conventional backlight power consumption of the backlight unit is expressed as:
PW(SD)=Hm*I*J,
where Hm represents a maximum conventional backlight value.

### Claim 10 (depends on 1)

The image display processing method according to claim 1, wherein acquiring the respective initial backlight values of the plurality of backlight blocks of the s-th frame of image, and performing the peak driving process on the respective initial backlight values of the plurality of backlight blocks of the s-th frame of image based on the peak driving threshold of the (s-1)-th frame of image, so as to obtain the adjusted backlight values of the respective backlight blocks of the s-th frame of image, comprises:
acquiring the respective initial backlight values of the plurality of backlight blocks of the s-th frame of image after a second local dimming process is performed on the s-th frame of the image;
judging whether an initial backlight value of an (n, p)-th backlight block of the s-th frame of image is greater than or equal to the peak driving threshold of the (s-1)-th frame of image;
in a case where the initial backlight value of the (n, p)-th backlight block is greater than or equal to the peak drive threshold of the (s-1)-th frame of image, performing the peak driving process on the (n, p)-th backlight block to obtain the adjusted backlight value of the (n, p)-th backlight block; and
in a case where the backlight value of the (n, p)-th backlight block is less than the peak driving threshold of the (s-1)-th frame of image, keeping the initial backlight value of the (n, p)-th backlight block unchanged,
wherein 1<n<I, 1<p<J, I and j respectively represent a number of rows and a number of columns of an array in which the plurality of backlight blocks are arranged.

### Claim 11 (depends on 10)

The image display processing method according to claim 10, wherein performing the peak driving process on the (n, p)-th backlight block to obtain the adjusted backlight value of the (n, p)-th backlight block is performed according to a following formula:
Bs_set(n,p)=K* Bs_current(n,p),
where Bs_set(n, p) represents the adjusted backlight value after the peak driving process is performed on the (n, p)-th backlight block of the s-th frame of image, Bs_current(n, p) represents the initial backlight value before performing the peak driving process on the (n, p)-th backlight block of the s-th frame of image, and K is a peak driving adjustment coefficient.

### Claim 12

An image display processing device, comprising:
a peak driving threshold acquisition circuit, configured to obtain a peak driving threshold of an (s-1)-th frame of image based on respective backlight values of a plurality of backlight blocks of the (s-1)-th frame of image after a local dimming process is performed on the (s-1)-th frame of image;
an adjusting backlight value acquisition circuit, configured to acquire respective initial backlight values of the plurality of backlight blocks of an s-th frame of image, and perform a peak driving process on the respective initial backlight values of the plurality of backlight blocks of the s-th frame of image based on the peak driving threshold of the (s-1)-th frame of image, so as to obtain respective adjusted backlight values of the plurality of backlight blocks of the s-th frame of image; and
an image display circuit, configured to display the s-th frame of image by using the respective adjusted backlight values of the respective backlight blocks of the s-th frame of image,
wherein s is an integer greater than 1;
wherein the image display processing device is configured to:
acquire a maximum backlight value of the plurality of backlight blocks of the (s-1)-th frame of image;
judge whether the maximum backlight value of the plurality of backlight blocks of the (s-1)-th frame of image is greater than or equal to a preset threshold; and
judge whether a total backlight power consumption of the (s-1)-th frame of image is less than a conventional backlight power consumption of a backlight unit, and
obtain the peak driving threshold of the (s-1)-th frame of image based on the backlight values of the respective backlight blocks of the (s-1)-th frame of image after the first local dimming process is performed on the (s-1)-th frame of image is performed, wherein in a case where the maximum backlight values of the respective backlight blocks of the (s-1)-th frame of image is great than or equal to the preset threshold and the total backlight power consumption of the (s-1)-th frame of image is less than the conventional backlight power consumption, and otherwise, not perform the peak driving process on the respective initial backlight values of the plurality of backlight blocks of the s-th frame of image.

### Claim 13 (depends on 1)

An image display processing device, comprising:
a processor;
a storage; and
one or a plurality of computer program modules, wherein the one or the plurality of computer program modules are stored in the storage and are configured to be executed by the processor, and the one or the plurality of computer program modules comprise an instruction used for achieving the image display processing method according to claim 1.

### Claim 14 (depends on 12)

A display device, comprising the image display processing device according to claim 12.

### Claim 15 (depends on 13)

A display device, comprising the image display processing device according to claim 13.

### Claim 16 (depends on 1)

A non-volatile storage medium, storing a computer-readable instruction non-transitorily,
wherein the image display processing method according to claim 1 is executed in a case where the computer-readable instruction stored non-transitorily is executed by a computer.