CONTROLLABLE BACKLIGHT STRUCTURE AND DISPLAY DEVICE

• US 20200133037A1
• Filed: 01/18/2018
• Published: 04/30/2020
• Est. Priority Date: 12/28/2017
• Status: Abandoned Application

• Current Assignee: Huizhou China Star Optoelectronics Technology Co., Ltd.
• Original Assignee: Huizhou China Star Optoelectronics Technology Co., Ltd.
• Inventors: LI, Dehua
• Application Number:
  US15/752,463
• Publication Number:
  US 20200133037A1
• Time in Patent Office: Days
• CPC Class Codes: G02F 1/1336 Illuminating devices
• CPC Class Codes: G02F 1/133601 for spatial active dimming
• CPC Class Codes: G02F 1/133606 including a specially adapted diffusing, scattering or light controlling members
• CPC Class Codes: G09G 3/3406 Control of illumination source illumination devices structurally associated with liquid crystal cells G02F1/1336
• CPC Class Codes: G09G 3/36 using liquid crystals

Abstract

The present disclosure discloses a controllable backlight structure and a display device using the structure. The controllable backlight structure includes a liquid crystal panel and a backlight source for providing a light source for the liquid crystal panel, wherein a shutter unit is disposed between the liquid crystal panel and the backlight source, the shutter unit includes a plurality of blades arranged in an array, each blade is connected with at least one rotating mechanism, the rotating mechanism is connected with a control circuit, a rotation of each rotating mechanism opens and closes one blade to control the backlight source to have different incident light in different regions of the liquid crystal panel. The structure of the controllable backlight of the present disclosure is simple and easy to implement. The structure of the controllable backlight with improved image quality of the liquid crystal is simple and easy to be implemented.

Claims

1. A controllable backlight structure, comprising a liquid crystal panel and a backlight source for providing a light source for the liquid crystal panel, a shutter unit disposed between the liquid crystal panel and the backlight source, wherein the shutter unit comprises a plurality of blades arranged in an array, each blade is connected with at least one rotating mechanism, the rotating mechanism is connected with a control circuit, a rotation of each rotating mechanism opens and closes one blade to control the backlight source to have different incident light in different regions of the liquid crystal panel.

2. The controllable backlight structure according to claim 1, wherein the shutter unit further comprises a shutter bracket to which the blade is mounted, and both ends of the blade are rotatably connected to the shutter bracket.

3. The controllable backlight structure according to claim 2, wherein the rotating mechanism is provided at a tip of the blade, and the rotating mechanism comprises:

a first rotating shaft rotatably connected to the shutter bracket and having one end fixedly connected with the blade;

a coil disposed on an end of the first rotating shaft away from the blade and connected to the control circuit; and

a permanent magnet fixed to the shutter bracket and disposed on both sides of the coil, wherein a magnetic field of the permanent magnet rotates the energized coil.

4. The controllable backlight structure according to claim 3, wherein the rotating mechanism further comprises a second rotating shaft, one end of the second rotating shaft is fixed to one end of the blade away from the first rotating shaft, and the other end of the second rotating shaft is rotatably connected to the shutter bracket.

5. The controllable backlight structure according to claim 3, wherein the rotating mechanism further comprises an angle sensor provided on the shutter bracket, and the angle sensor is connected to the control circuit to control a rotation angle of the first rotating shaft.

6. The controllable backlight structure according to claim 2, wherein the rotating mechanism is disposed at the tip of the blade, and the rotating mechanism comprises:

a first rotating shaft rotatably connected to the shutter bracket and having one end fixedly connected with the blade;

a permanent magnet spaced from the first rotating shaft and fixed to the shutter bracket;

a coil disposed outside the permanent magnet and connected with the control circuit to slide relative to the permanent magnet after being electrified; and

a connecting rod, one end of the connecting rod is rotatably connected to one side of the coil, and the other end of the connecting rod is rotatably connected to an end of the first rotating shaft away from the blade.

7. The controllable backlight structure according to claim 6, wherein the rotating mechanism further comprises a second rotating shaft, one end of the second rotating shaft is fixed to one end of the blade away from the first rotating shaft, and the other end of the second rotating shaft is rotatably connected to the shutter bracket.

8. The controllable backlight structure according to claim 6, wherein the rotating mechanism further comprises an angle sensor provided on the shutter bracket, and the angle sensor is connected to the control circuit to control a rotation angle of the first rotating shaft.

9. The controllable backlight structure according to claim 2, wherein the plurality of blades arranged in an array form a group of blades, the group of the blades are arranged vertically or transversely.

10. The controllable backlight structure according to claim 2, wherein the blades arranged in the plurality of arrays form two groups of the blades, the two groups of the blades are arranged at intervals, comprising a vertical blade group and a transverse blade group, and the two groups of the blades are both fixed on the shutter bracket;

wherein the transverse blade group is disposed between the liquid crystal panel and the vertical blade group, or the vertical blade group is disposed between the liquid crystal panel and the transverse blade group.

11. A display device, comprising a controllable backlight structure, the controllable backlight structure comprises a liquid crystal panel and a backlight source for providing a light source for the liquid crystal panel, a shutter unit disposed between the liquid crystal panel and the backlight source, wherein the shutter unit comprises a plurality of blades arranged in an array, each blade is connected with at least one rotating mechanism, the rotating mechanism is connected with a control circuit, a rotation of each rotating mechanism opens and closes one blade to control the backlight source to have different incident light in different regions of the liquid crystal panel.

12. The display device according to claim 11, wherein the shutter unit further comprises a shutter bracket to which the blade is mounted, and both ends of the blade are rotatably connected to the shutter bracket.

13. The display device according to claim 12, wherein the rotating mechanism is provided at a tip of the blade, and the rotating mechanism comprises:

a first rotating shaft rotatably connected to the shutter bracket and having one end fixedly connected with the blade;

a coil disposed on an end of the first rotating shaft away from the blade and connected to the control circuit; and

a permanent magnet fixed to the shutter bracket and disposed on both sides of the coil, wherein a magnetic field of the permanent magnet rotates the energized coil.

14. The display device according to claim 13, wherein the rotating mechanism further comprises a second rotating shaft, one end of the second rotating shaft is fixed to one end of the blade away from the first rotating shaft, and the other end of the second rotating shaft is rotatably connected to the shutter bracket.

15. The display device according to claim 13, wherein the rotating mechanism further comprises an angle sensor provided on the shutter bracket, and the angle sensor is connected to the control circuit to control a rotation angle of the first rotating shaft.

16. The display device according to claim 12, wherein the rotating mechanism is disposed at the tip of the blade, and the rotating mechanism comprises:

a first rotating shaft rotatably connected to the shutter bracket and having one end fixedly connected with the blade;

a permanent magnet spaced from the first rotating shaft and fixed to the shutter bracket;

a coil disposed outside the permanent magnet and connected with the control circuit to slide relative to the permanent magnet after being electrified; and

a connecting rod, one end of the connecting rod is rotatably connected to one side of the coil, and the other end of the connecting rod is rotatably connected to an end of the first rotating shaft away from the blade.

17. The display device according to claim 16, wherein the rotating mechanism further comprises a second rotating shaft, one end of the second rotating shaft is fixed to one end of the blade away from the first rotating shaft, and the other end of the second rotating shaft is rotatably connected to the shutter bracket.

18. The display device according to claim 16, wherein the rotating mechanism further comprises an angle sensor provided on the shutter bracket, and the angle sensor is connected to the control circuit to control a rotation angle of the first rotating shaft.

19. The display device according to claim 12, wherein the plurality of blades arranged in an array form a group of blades, the group of the blades are arranged vertically or transversely.

20. The display device according to claim 12, wherein the blades arranged in the plurality of arrays form two groups of the blades, the two groups of the blades are arranged at intervals, comprising a vertical blade group and a transverse blade group, and the two groups of the blades are both fixed on the shutter bracket;

wherein the transverse blade group is disposed between the liquid crystal panel and the vertical blade group, or the vertical blade group is disposed between the liquid crystal panel and the transverse blade group.