CN-119007663-B - Display device, control method and unit of backlight brightness of display device and storage medium

CN119007663BCN 119007663 BCN119007663 BCN 119007663BCN-119007663-B

Abstract

The invention provides a display device, a control method, a unit and a storage medium of backlight brightness thereof, which comprise the steps of obtaining characteristic brightness of a display partition to be controlled in a plurality of display partitions and actual brightness of the display partition to be controlled in a current environment, determining a difference value between the actual brightness of the display partition to be controlled and the characteristic brightness of the display partition to be controlled, sending a first control instruction to a backlight module based on a feedback signal obtained by comparing the difference value with a preset threshold value corresponding to the display partition to be controlled in the current environment, so that the backlight module controls the brightness of the backlight partition corresponding to the display partition to be controlled, and adjusting the brightness of all the display partitions according to the influence degree and the condition of different display partitions under the influence of ambient light.

Inventors

LI LEI
MENG ZHAOHUI
LONG FENG
LI SHUO
Feng Boshi
SONG HAO
Feng Yeyu
WU YANHUA

Assignees

北京京东方显示技术有限公司
京东方科技集团股份有限公司

Dates

Publication Date: 20260512
Application Date: 20240827

Claims (17)

1. The method for controlling the backlight brightness of the display device is characterized in that the display device comprises a display panel and a backlight module, the display panel comprises a plurality of display partitions, the backlight module comprises a plurality of backlight partitions which are in one-to-one correspondence with the plurality of display partitions, and the method comprises the following steps: The method comprises the steps of obtaining characteristic brightness of a display partition to be controlled in the plurality of display partitions and actual brightness of the display partition to be controlled in the current environment, wherein the characteristic brightness of the display partition to be controlled is the brightness of the display partition to be controlled in a preset environment, and the influence of ambient light on the brightness of the display partition is eliminated by the preset environment; determining the difference value between the actual brightness of the display partition to be controlled and the characteristic brightness of the display partition to be controlled; And sending a first control instruction to the backlight module based on a feedback signal obtained by comparing the difference value with a preset threshold value corresponding to the display partition to be controlled in the current environment, so that the backlight module controls the brightness of the backlight partition corresponding to the display partition to be controlled.
2. The method for controlling backlight brightness of a display device according to claim 1, wherein obtaining the characteristic brightness of the display section to be controlled comprises: acquiring a current video data stream of the display partition to be controlled and current backlight control data of the display partition to be controlled in a current environment; and determining the characteristic brightness of the display partition to be controlled according to the current video data stream and the current backlight control data.
3. The method of claim 2, wherein determining the characteristic brightness of the display section to be controlled based on the current video data stream and the current backlight control data, comprises: determining the current opening number of sub-pixels in the display partition to be controlled according to the current video data stream; determining the current backlight brightness of the display partition to be controlled according to the current backlight control data; determining the characteristic brightness of the display partition according to the current starting number of the sub-pixels, the current backlight brightness and a preset characteristic brightness relation library; The characteristic brightness relation library comprises the association relation among the starting number of sub-pixels in the to-be-controlled display partition under a preset environment, the backlight brightness of the to-be-controlled display partition under the preset environment and the characteristic brightness of the to-be-controlled display partition under the preset environment.
4. The method for controlling backlight brightness of a display device according to claim 1, wherein obtaining actual brightness of a display partition to be controlled among the plurality of display partitions in the current environment comprises: Receiving a brightness signal detected by a brightness detection device in the display partition to be controlled, wherein the brightness detection device is arranged on the surface of the display panel far away from the backlight module; and determining the actual brightness of the display partition to be controlled based on the brightness signal.
5. The method of controlling backlight luminance of a display device according to claim 4, wherein the luminance detecting means is: a photoresistor material layer laid on each display region, or And photoresistor devices individually disposed on each display area.
6. The method of controlling backlight brightness of a display device according to claim 1, further comprising: a preset threshold corresponding to the display partition to be controlled in the current environment is called from the storage medium; and comparing the difference value with the preset threshold value.
7. The method of controlling backlight brightness of a display device according to claim 1, further comprising: The difference is input to a first input of a comparator, And inputting a preset threshold corresponding to the display partition to be controlled into a second input end of the comparator.
8. The method for controlling backlight brightness of a display device according to claim 6 or 7, wherein the sending, by the feedback signal obtained based on the comparison result of the difference value and the preset threshold value corresponding to the to-be-controlled display partition in the current environment, a first control instruction to the backlight module includes: and responding to the comparison result that the difference value is larger than the preset threshold value, and sending a dimming instruction to the backlight module so that the backlight module changes the brightness of the backlight partition corresponding to the display partition to be controlled.
9. The method of claim 8, wherein the sending a dimming command to the backlight module to enable the backlight module to change the brightness of the backlight partition corresponding to the display partition to be controlled in response to the comparison result that the difference value is greater than the preset threshold value, comprises: And if the comparison results corresponding to the display partitions to be controlled are all that the difference value is larger than the preset threshold value, sending a dimming instruction to the backlight module, so that the backlight module changes the brightness of the backlight partition corresponding to the display partition to be controlled according to the sequence generated by the comparison results.
10. The method according to claim 1, wherein after sending a first control instruction to the backlight module to cause the backlight module to control the brightness of the backlight partition corresponding to the display partition to be controlled, the method further comprises: Receiving a detection signal, wherein the detection signal characterizes whether brightness interference of the display partition to be controlled is eliminated; And if the detection signal is received to indicate that the interference is eliminated, sending a second control instruction to the backlight module so that the backlight module recovers the brightness of the backlight partition corresponding to the display partition to be controlled.
11. The method for controlling backlight brightness of a display device according to claim 10, wherein, If the change value of the actual brightness of the display partition to be controlled is within a preset range, the detection signal indicates that the interference is not eliminated; If the change value of the actual brightness of the display partition to be controlled is outside a preset range, the detection signal indicates that the interference is eliminated.
12. A control unit of backlight brightness, characterized in that it comprises a processor and a memory, said memory being adapted to store a plurality of program codes, said program codes being adapted to be loaded and executed by said processor to perform the control method of backlight brightness according to any one of claims 1 to 11.
13. A computer readable storage medium, characterized in that a plurality of program codes are stored, which are adapted to be loaded and executed by a processor to perform the method of controlling backlight brightness according to any one of claims 1 to 11.
14. A display device, comprising A display panel including a plurality of display sections; the backlight module comprises a plurality of backlight partitions which are in one-to-one correspondence with the display partitions; the control unit of claim 12; And the brightness detection device is arranged on the surface of the display panel far away from the backlight module.
15. The display device according to claim 14, further comprising: And the comparator is used for comparing the difference value with a preset threshold value corresponding to the display partition to be controlled in the current environment.
16. The display device according to claim 15, wherein the number of comparators is one-to-one corresponding to the number of display partitions, and is used for comparing the difference value corresponding to the display partition with a preset threshold value.
17. The display device according to claim 15 or 16, wherein the comparator and the control unit are both disposed in a bonding region of the display panel.

Description

Display device, control method and unit of backlight brightness of display device and storage medium Technical Field The present invention relates to the field of display technologies, and in particular, to a display device, a method, a unit, and a storage medium for controlling backlight brightness of the display device. Background In recent years, the Liquid crystal display (Liquid CRYSTAL DISPLAY, LCD) combines the light emitting diode (LIGHTEMITTING DIODE, LED) backlight area adjusting technology, so that the LCD display technology has the advantages of the novel flat panel display technology such as OLED and the like, and has the display characteristics of ultrahigh resolution, wide color gamut, high contrast, high brightness, high dynamic range and low power consumption However, large-sized LCDs are susceptible to ambient light, and have poor display effects due to local projection and reflection of light on the LCD. Disclosure of Invention The present invention has been made to overcome the above-mentioned drawbacks, and provides a display device, a method, an apparatus and a storage medium for controlling backlight brightness thereof, which solve or at least partially solve the technical problem that an LCD is susceptible to ambient light, resulting in poor display effect. In a first aspect, the present invention provides a method for controlling backlight brightness of a display device, where the display device includes a display panel and a backlight module, the display panel includes a plurality of display partitions, and the backlight module includes a plurality of backlight partitions corresponding to the plurality of display partitions one by one, the method includes: The characteristic brightness of the display subarea to be controlled in the plurality of display subareas and the actual brightness of the display subarea to be controlled in the current environment are obtained, wherein the characteristic brightness of the display subarea to be controlled is the brightness of the display subarea to be controlled in the preset environment; determining the difference value between the actual brightness of the display partition to be controlled and the characteristic brightness of the display partition to be controlled; And sending a first control instruction to the backlight module based on a feedback signal obtained by comparing the difference value with a preset threshold value corresponding to the display partition to be controlled in the current environment, so that the backlight module controls the brightness of the backlight partition corresponding to the display partition to be controlled. Further, in the method for controlling backlight brightness of a display device, obtaining the characteristic brightness of the display area to be controlled includes: acquiring a current video data stream of the display partition to be controlled and current backlight control data of the display partition to be controlled in a current environment; and determining the characteristic brightness of the display partition to be controlled according to the current video data stream and the current backlight control data. Further, in the method for controlling backlight brightness of a display device, determining, according to the current video data stream and the current backlight control data, the characteristic brightness of the display partition to be controlled includes: determining the current opening number of sub-pixels in the display partition to be controlled according to the current video data stream; determining the current backlight brightness of the display partition to be controlled according to the current backlight control data; determining the characteristic brightness of the display partition according to the current starting number of the sub-pixels, the current backlight brightness and a preset characteristic brightness relation library; The characteristic brightness relation library comprises the association relation among the starting number of sub-pixels in the to-be-controlled display partition under a preset environment, the backlight brightness of the to-be-controlled display partition under the preset environment and the characteristic brightness of the to-be-controlled display partition under the preset environment. Further, in the method for controlling backlight brightness of a display device, obtaining actual brightness of a display partition to be controlled in the plurality of display partitions in the current environment includes: Receiving a brightness signal detected by a brightness detection device in the display partition to be controlled, wherein the brightness detection device is arranged on the surface of the display panel far away from the touch module; and determining the actual brightness of the display partition to be controlled based on the brightness signal. Further, in the method for controlling backlight brightness of a display device, the brightness detection