Backlight module and display device

• US 10,209,433 B2
• Filed: 09/19/2016
• Issued: 02/19/2019
• Est. Priority Date: 01/05/2016
• Status: Active Grant

• Current Assignee: Beijing BOE Display Technology Co Ltd (BOE Technology Group Co., Ltd.), BOE Technology Group Co., Ltd.
• Original Assignee: Beijing BOE Display Technology Co Ltd (BOE Technology Group Co., Ltd.), BOE Technology Group Co., Ltd.
• Inventors: Lee, Sangjig
• Primary Examiner(s): Breval, Elmito
• Application Number:
  US15/511,376
• Publication Number:
  US 20180113252A1
• Time in Patent Office: 883 Days
• Field of Search: None
• CPC Class Codes: F21S 8/00 Lighting devices intended for fixed installation F21S9/00, F21S10/00 take precedence; using a string or strip of light sources F21S4/00
• CPC Class Codes: F21V 17/16 by deformation of parts; Snap action mounting
• CPC Class Codes: G02B 6/00 Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
• CPC Class Codes: G02B 6/0051 Diffusing sheet or layer
• CPC Class Codes: G02B 6/0088 of the light guide or other optical sheets in the package
• CPC Class Codes: G02F 1/133322 Mechanical guidance or alignment of LCD panel support components
• CPC Class Codes: G02F 1/133615 Edge-illuminating devices, i.e. illuminating from the side
• CPC Class Codes: G02F 2201/54 Arrangements for reducing warping-twist

Abstract

A backlight module and a display device are disclosed. The backlight module includes a light guide plate and a position limit structure. The position limit structure includes a support plate and an elastic position limit protrusion disposed on the support plate, the elastic position limit protrusion corresponds to a side surface of the light guide plate, and the elastic position limit protrusion generates elastic deformation along a direction perpendicular to the support plate upon being pressed by the side surface of the light guide plate.

Claims

1. A backlight module, comprising:

a light guide plate and a position limit structure,

wherein the position limit structure comprises a support plate and an elastic position limit protrusion disposed on the support plate, the elastic position limit protrusion corresponds to a side surface of the light guide plate, and the elastic position limit protrusion is configured to generate elastic deformation along a direction perpendicular to the support plate upon being subjected to a pressure from the side surface of the light guide plate;

wherein the side surface of the light guide plate is provided with a groove, the elastic position limit protrusion corresponds to the groove, and the elastic position protrusion is configured to generate the elastic deformation along the direction perpendicular to the support plate upon being subjected to the pressure from the groove;

wherein a top surface of the elastic position protrusion and a bottom surface of the groove contact with each other, and the side surface of the light guide plate and the support plate have a first distance therebetween upon the pressure that the elastic position limit protrusion is subjected to being smaller than a preset value; and

the top surface of the elastic position limit protrusion and the bottom surface of the groove contact with each other, and the side surface of the light guide plate and the support plate have a second distance therebetween upon the pressure that the elastic position limit protrusion is subjected to being larger than or equal to the preset value, the second distance is smaller than the first distance.

2. The backlight module according to claim 1, further comprising:

a back plate, wherein the light guide plate is disposed on the back plate, the position limit structure is disposed at an edge of the back plate and corresponds to the side surface of the light guide plate.

3. The backlight module according to claim 2, wherein the back plate has a polygon shape, the position limit structure is disposed on at least one edge of the back plate and corresponds to at least one side surface of the light guide plate.

4. The backlight module according to claim 3, wherein the support plate is connected to the back plate, the support plate is provided with a fixing element, configured to keep relative fixation of the elastic position limit protrusion and the back plate along a direction perpendicular to a direction of elastic deformation of the elastic position limit protrusion.

5. The backlight module according to claim 4, wherein the support plate and the back plate have an integrated structure.

6. The backlight module according to claim 4, wherein the elastic position limit protrusion comprises a position limit element and an elastic element which are relatively fixed, the elastic element and the fixing element are relatively fixed along a direction perpendicular to a direction of elastic deformation of the elastic element.

7. The backlight module according to claim 6, wherein the elastic element is a spring, the position limit element comprises a columnar body and a top surface, a diameter of the top surface is larger than an internal diameter of the spring, and the spring is sleeved on the columnar body.

8. The backlight module according to claim 7, wherein the fixing element is a columnar protrusion, an internal diameter of the columnar body is larger than an external diameter of the columnar protrusion, and the columnar body is sleeved on the columnar protrusion.

9. The backlight module according to claim 8, wherein a bottom surface of the columnar body and the support plate has a third distance therebetween upon the elastic position limit protrusion not being pressed, and the bottom surface of the columnar body and the support plate contact with each other upon the elastic position limit protrusion being pressed.

10. The backlight module according to claim 8, further comprising:

a detachable support element,

wherein the columnar protrusion has a hollow structure, a diameter of the detachable support element is smaller than the internal diameter of the columnar protrusion, the detachable support element is configured to fix the position limit element, so as to make the bottom surface of the columnar body and the support plate have a fourth distance therebetween upon being inserted in the columnar protrusion.

11. The backlight module according to claim 10, wherein the fourth distance comprises zero.

12. The backlight module according to claim 10, wherein an internal top surface of the columnar body is provided with a fixing groove, an end of the detachable support element is fixed in the fixing groove, so as to make the top surface of the position limit element and the bottom surface of the groove have a fifth distance therebetween upon the detachable support element supporting the position limit element.

13. The backlight module according to claim 12, wherein the fifth distance comprises zero.

14. The backlight module according to claim 12, wherein the detachable support element comprises a screw, at least one selected from the group consisting of an internal wall of the columnar protrusion and the fixing groove is provided with a screw thread matching with the screw.

15. The backlight module according to claim 1, wherein a length of the elastic position limit protrusion is smaller than a length of the groove.

16. A display device, comprising the backlight module according to claim 1.