Backlight control method and system, display device, and readable storage medium

Patent metadata

Field	Value
Publication number	US-12550241-B2
Application number	US-202218271034-A
Country	US
Kind code	B2
Filing date	Mar 25, 2022
Priority date	Mar 25, 2022
Publication date	Feb 10, 2026
Grant date	Feb 10, 2026

Abstract

Provided are a backlight control method and system, a display device and a readable storage medium. The backlight control method includes: obtaining a backlight control signal, where the backlight control signal includes a mode signal and a data signal (21); obtaining the mode signal in the backlight control signal, where the mode signal includes a phase adjustment signal or a local dimming signal (22); in response to that the mode signal is the phase adjustment signal, writing the data signal corresponding to the mode signal into a light source drive module, such that the light source drive module adjusts a phase of a backlight source based on the data signal (23). By adding the phase adjustment signal to the backlight control signal, a backlight refresh phase may be directly adjusted by a front end device, without adding hardware, bringing conveniences and speediness.

First claim

The invention claimed is:

1 . A backlight control method, comprising:
obtaining a backlight control signal, wherein the backlight control signal comprises a mode signal and a data signal; obtaining the mode signal in the backlight control signal, wherein the mode signal comprises a phase adjustment signal or a local dimming signal; in response to that the mode signal is the phase adjustment signal, writing the data signal corresponding to the mode signal into a light source drive module, such that the light source drive module adjusts a phase of a backlight source based on the data signal; and in response to detecting a report point signal, obtaining a backlight control signal comprising the mode signal that is a phase adjustment signal and the data signal that is a backlight refresh phase; wherein obtaining the backlight control signal comprising the mode signal that is the phase adjustment signal and the data signal that is the backlight refresh phase comprises:
obtaining a current backlight refresh phase and a current scanning frequency of a display screen;
obtaining, at the current scanning frequency, an immediately-next backlight refresh phase after the current backlight refresh phase in order in a preset lookup table; and
adjusting the mode signal of the backlight control signal to the phase adjustment signal and the data signal to the immediately-next backlight refresh phase so as to obtain the backlight control signal;
or, obtaining a backlight refresh phase corresponding to a position in the report point signal; determining a target backlight refresh phase whose difference from the backlight refresh phase is more than a preset threshold in a preset lookup table; adjusting the mode signal of the backlight control signal to the phase adjustment signal and the data signal to the target backlight refresh phase so as to obtain the backlight control signal.

2 . The method according to claim 1 , wherein obtaining the mode signal in the backlight control signal comprises:
analyzing the mode signal in the backlight control signal; wherein a value of the mode signal comprises a first value for indicating a phase adjustment mode and a second value for indicating a local dimming mode; in response to that the value of the mode signal is the first value, determining the mode signal is the phase adjustment signal; in response to that the value of the mode signal is the second value, determining the mode signal is the local dimming signal.

3 . The method according to claim 1 , further comprising:
sending a target scanning frequency corresponding to the phase adjustment signal to the display screen, such that a scanning frequency of the display screen is adjusted to the target scanning frequency.

4 . The method according to claim 1 , further comprising:
performing checking on the backlight control signal.

5 . The method according to claim 1 , further comprising:
in response to that the mode signal is the local dimming signal, writing the data signal corresponding to the mode signal into the light source drive module, such that the light source drive module adjusts a backlight brightness based on the data signal in the backlight control signal.

6 . A backlight system, comprising a master control board and a backlight control unit, the backlight control unit is connected with the master control board;
the master control board is configured to, in response to detecting a report point signal, obtain a backlight control signal comprising a mode signal that is a phase adjustment signal and a data signal that is a backlight refresh phase; the backlight control unit is configured to obtain the backlight control signal comprising the mode signal and the data signal, and obtain the mode signal in the backlight control signal, wherein the mode signal comprises a phase adjustment signal or a local dimming signal; and in response to that the mode signal is the phase adjustment signal, write the data signal corresponding to the mode signal into a light source drive module, such that the light source drive module adjusts a phase of a backlight source based on the data signal; wherein obtaining, by the master control board, the backlight control signal comprising the mode signal that is the phase adjustment signal and the data signal that is the backlight refresh phase comprises: obtaining a current backlight refresh phase and a current scanning frequency of a display screen; obtaining an immediately-next backlight refresh phase after the current backlight refresh phase in order under the current scanning frequency in a preset lookup table; adjusting the mode signal of the backlight control signal to the phase adjustment signal and the data signal to the immediately-next backlight refresh phase so as to obtain the backlight control signal;
or,
obtaining a backlight refresh phase corresponding to a position in the report point signal;
determining a target backlight refresh phase whose difference from the backlight refresh phase is more than a preset threshold in a preset lookup table;
adjusting the mode signal of the backlight control signal to the phase adjustment signal and the data signal to the target backlight refresh phase so as to obtain the backlight control signal.

7 . The system according to claim 6 , wherein obtaining, by the backlight control unit, the mode signal in the backlight control signal comprises:
analyzing the mode signal in the backlight control signal; wherein a value of the mode signal comprises a first value for indicating a phase adjustment mode and a second value for indicating a local dimming mode; in response to that the value of the mode signal is the first value, determining the mode signal is the phase adjustment signal; in response to that the value of the mode signal is the second value, determining the mode signal is the local dimming signal.

8 . The system according to claim 6 , wherein the master control board is further configured to send a target scanning frequency corresponding to the phase adjustment signal to the display screen, such that a scanning frequency of the display screen is adjusted to the target scanning frequency.

9 . The system according to claim 6 , wherein the backlight control unit is further configured to, after receiving the backlight control signal, perform checking on the backlight control signal.

10 . The system according to claim 6 , wherein the backlight control unit is further configured to:
in response to that the mode signal is the local dimming signal, write the data signal corresponding to the mode signal into the light source drive module, such that the light source drive module adjusts a backlight brightness based on the data signal in the backlight control signal.

11 . A display device, comprising the backlight system according to claim 6 and a display screen;
the display screen is configured to generate a report point signal and send the report point signal to the backlight system;
the backlight system is configured to, based on the report point signal, adjust a backlight refresh phase.

12 . A non-transitory computer readable storage medium, wherein executable computer programs in the storage medium are executed by a processor to perform:
obtaining a backlight control signal, wherein the backlight control signal comprises a mode signal and a data signal; obtaining the mode signal in the backlight control signal, wherein the mode signal comprises a phase adjustment signal or a local dimming signal; in response to that the mode signal is the phase adjustment signal, writing the data signal corresponding to the mode signal into a light source drive module

Assignees

• Beijing Boe Display Tech Co
• Boe Technology Group Co Ltd

Inventors

• He Jianzi
• Li Shou
• Guo Naijia
• Meng Zhiming
• Su Junning
• Chao He
• Zhao Yucheng
• Li Minghan

Classifications

• G02F1/1336

  Illuminating devices · CPC title

• G09G3/20

  for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix {no fixed position being assigned to or needed to be assigned to the individual characters or partial characters} · CPC title

• H05B47/105 Primary

  in response to determined parameters · CPC title