Backlight source, display device, and method for partition control

Patent metadata

Field	Value
Publication number	US-12416832-B2
Application number	US-202318338004-A
Country	US
Kind code	B2
Filing date	Jun 20, 2023
Priority date	Nov 1, 2022
Publication date	Sep 16, 2025
Grant date	Sep 16, 2025

Abstract

A backlight source, a display device, and a method for partition control are provided. The backlight source includes a lamp panel and multiple light-emitting elements disposed on the lamp panel and electrically connected to the lamp panel. The backlight source further includes a transmission member fixedly connected to the lamp panel. The transmission member is configured to rotatably drive the lamp panel to rotate at a preset rotation rate, to make the lamp panel drive the multiple light-emitting elements to rotate at the preset rotation rate, to form a surface light source.

First claim

What is claimed is:

1. A backlight module, comprising a plurality of backlight sources, wherein
the plurality of backlight sources each comprises a lamp panel and a plurality of light-emitting elements disposed on the lamp panel and electrically connected to the lamp panel,
the plurality of backlight sources each further comprises a transmission member, wherein the transmission member has one end directly fixedly connected to the lamp panel, the transmission member is configured to rotate so as to drive the lamp panel to rotate at a preset rotation rate, to make the lamp panel drive the plurality of light-emitting elements to rotate at the preset rotation rate, to form a surface light source, and
wherein the plurality of backlight sources are arranged in an array, a phase difference between two adjacent backlight sources is π/2, and an interval between rotation axes of two adjacent backlight sources is greater than a rotation radius of each of the plurality of backlight sources, and less than or equal to √{square root over (2)} times the rotation radius of each of the plurality of backlight sources, regions of surface light sources formed by rotation of two adjacent backlight sources being intersected.

2. The backlight module of claim 1 , wherein the plurality of light-emitting elements are arranged in an array on the lamp panel at intervals of a preset distance, and the preset rotation rate is greater than or equal to 12 Hz.

3. The backlight module of claim 2 , wherein the plurality of light-emitting elements are arranged in an X*N array on the lamp panel, wherein X and N each are a positive integer greater than or equal to 1, and Nis 20 to 30 times X.

4. A display device, comprising:
a backlight module, configured to provide light for display and comprising an optical regulating assembly, a back panel, a driving assembly, and a plurality of backlight sources, wherein
the plurality of backlight sources are disposed on the back panel and each comprises a lamp panel, a plurality of light-emitting elements disposed on the lamp panel and electrically connected to the lamp panel, and a transmission member, wherein the transmission member has one end directly fixedly connected to the lamp panel; the transmission member is configured to rotate so as to drive the lamp panel to rotate at a preset rotation rate, to make the lamp panel drive the plurality of light-emitting elements to rotate at the preset rotation rate, to form a surface light source; and wherein the plurality of backlight sources are arranged in an array, a phase difference between two adjacent backlight sources is π/2, and an interval between rotation axes of two adjacent backlight sources is greater than a rotation radius of each of the plurality of backlight sources, and less than or equal to √{square root over (2)} times the rotation radius of each of the plurality of backlight sources, regions of surface light sources formed by rotation of two adjacent backlight sources being intersected;
the optical regulating assembly is disposed at a light-exiting side of the backlight sources of the plurality of backlight sources and configured to regulate a light-emitting angle of the backlight sources of the plurality of backlight sources; and
the driving assembly is configured to drive the backlight sources of the plurality of backlight sources to rotate at the preset rotation rate; and

a display panel, disposed at a light-exiting side of the backlight module.

5. The display device of claim 4 , wherein each backlight source forms a partition-controlled surface light source, or a plurality of backlight sources cooperatively form a partition-controlled surface light source.

6. The display device of claim 4 , wherein the plurality of light-emitting elements are arranged in an array on the lamp panel at intervals of a preset distance, and the preset rotation rate is greater than or equal to 12 Hz.

7. The display device of claim 4 , wherein the driving assembly comprises a plurality of driving motors, wherein each of the plurality of driving motors is rotatably connected to an end of a corresponding transmission member away from the lamp panel, and each of the plurality of driving motors is configured to drive a corresponding transmission member to rotate at the preset rotation rate, to make the transmission member drive rotation of a lamp panel of a corresponding backlight source.

8. The display device of claim 4 , wherein the backlight module comprises a plurality of backlight sources, and the driving assembly comprises a gear transmission set and a driving motor, wherein the gear transmission set comprises a plurality of gears, and the driving motor is configured to drive the gears of the gear transmission set to mesh with each other and rotate, to make each gear drive a corresponding transmission member to rotate at the preset rotation rate, and further make the transmission member drive a corresponding lamp panel to rotate at the preset rotation rate.

9. The display device of claim 4 , wherein the backlight module further comprises a backlight driving circuit disposed on the lamp panel and electrically connected to the light-emitting elements of the backlight sources of the plurality of backlight sources, and the backlight driving circuit is configured to selectively control the light-emitting elements for partition light emission.

10. The display device of claim 4 , wherein the backlight source comprises m light-emitting elements, and the transmission member is provided with n concentric-circular connectors, wherein m and n satisfy n=m+1.

11. The display device of claim 10 , wherein each of m light-emitting elements has a first electrode and a second electrode, wherein
first electrodes of the m light-emitting elements each are electrically connected to a first concentric-circular connector on the transmission member; and
second electrodes of the m light-emitting elements each are electrically connected to a correspondingly concentric-circular connector of the n concentric-circular connectors other than the first concentric-circular connector.

12. The display device of claim 4 , wherein the backlight module further comprises a structural cover, and the structural cover is disposed at the light-exiting side of the backlight sources of the plurality of backlight sources of the backlight module.

13. The display device of claim 4 , wherein the backlight module further comprises a guiding block disposed on a side surface of the lamp panel of the backlight sources of the plurality of backlight sources, away from the light-emitting elements, and the guiding block is configured to transfer heat generated by the display panel to the outside of the display device.

14. The display device of claim 4 , wherein the backlight module further comprises a support assembly, the support assembly is configured to adjust a distance between the optical regulating assembly and the backlight sources of the plurality of backlight sources.

15. A method for partition control, performed by the display device of claim 4 , and the method comprising:
obtaining a brightness signal and an adaptation signal corresponding to an image to-be-displayed;
driving, with the driving assembly, the lamp panel to rotate at a preset rotation rate and driving, with the backlight driving circuit, the plurality of light-emitting elements on the lamp panel, according to the brightness signal; and
displaying, with the display panel, the image according to the adaptation signal and partition light emission of the plurality of light-emitting elements on the lamp panel.

16. The method of claim 15

Assignees

• Hkc Corp Ltd

Inventors

• Wan Ye
• Yuan Haijiang

Classifications

• G09G2320/0626

  for control of overall brightness · CPC title

• G09G3/32

  semiconductive, e.g. using light-emitting diodes [LED] · CPC title

• G09G3/005

  forming an image using a quickly moving array of imaging elements, causing the human eye to perceive an image which has a larger resolution than the array, e.g. an image on a cylinder formed by a rotating line of LEDs parallel to the axis of rotation · CPC title

• G09F19/12

  using special optical effects · CPC title

• G09F13/30

  with moving light sources, e.g. rotating luminous tubes · CPC title