BACKLIGHT MODULE AND DISPLAY THEREOF

• US 20190317272A1
• Filed: 04/17/2019
• Published: 10/17/2019
• Est. Priority Date: 04/17/2018
• Status: Active Grant

• Current Assignee: TPK Universal Solutions Limited (TPK Holding Co., Ltd.)
• Original Assignee: TPK Universal Solutions Limited (TPK Holding Co., Ltd.)
• Inventors: Lin, Ming-Chuan, Wang, Kuo-Hsin, Lai, Sheh-Jung
• Granted Patent: US 10,866,355 B2
• Time in Patent Office: Days
• CPC Class Codes: G02B 6/0051 Diffusing sheet or layer
• CPC Class Codes: G02B 6/0055 Reflecting element, sheet or layer
• CPC Class Codes: G02B 6/0081 Mechanical or electrical aspects of the light guide and light source in the lighting device peculiar to the adaptation to planar light guides, e.g. concerning packaging
• CPC Class Codes: G02B 6/0088 of the light guide or other optical sheets in the package

Abstract

A backlight module includes a supporting member, a light source, a light guiding film and a colloid. The supporting member has a base plate and an extension cover plate opposite to the base plate. The base plate and the extension cover plate form an accommodating portion and a clamping portion in between. The light source is located at the accommodating portion. The light guiding film is located on the base plate. An end of the light guiding film is located at the clamping portion. The base plate has an extension portion exposed from the light guiding film. The colloid is disposed on the extension portion.

Claims

1. A backlight module, comprising:

a supporting member having a base plate and an extension cover plate over the base plate, wherein the base plate and the extension cover plate define an accommodating portion and a clamping portion in between;

a light source located at the accommodating portion;

a light guiding film located on the base plate, wherein an end of the light guiding film is located at the clamping portion, and the base plate comprises an extension portion exposed from the light guiding film; and

a colloid disposed on the extension portion.

2. The backlight module of claim 1, wherein a width of the extension portion is between about 0.2 mm and about 0.5 mm, and a width of the colloid is equal to or smaller than the width of the extension portion.

3. The backlight module of claim 1, wherein the base plate has a first side portion and a second side portion, the first side portion extends to form the extension cover plate, and the second side portion extends to form the extension portion.

4. The backlight module of claim 3, wherein the extension portion forms an inverted-U shape along edges of the base plate.

5. The backlight module of claim 1, wherein the supporting member further comprises a side plate connected between the base plate and the extension cover plate, wherein the base plate, the side plate and the extension cover plate are integrally formed by a metallic structure.

6. The backlight module of claim 1, wherein the base plate and the extension cover plate further form a gap in between, the gap is located between the accommodating portion and the clamping portion, and wherein a width of the gap is between about 1 mm and about 3 mm.

7. The backlight module of claim 6, wherein the extension cover plate comprises a reflective layer on a surface facing to the base plate, and at least a portion of the reflective layer aligns with the gap.

8. The backlight module of claim 6, further comprising a first reflective sheet located between the light guiding film and the base plate, wherein at least a portion of the first reflective sheet aligns with the gap.

9. The backlight module of claim 1, further comprising a second reflective sheet and a diffusion sheet, wherein the light guiding film is located between the second reflective sheet and the diffusion sheet, the second reflective sheet is located between the light guiding film and the base plate, and wherein the diffusion sheet and the light guiding film are adhered to each other, and the light guiding film and the second reflective sheet are adhered to each other.

10. The backlight module of claim 9, further comprising an assembling member located between the base plate and the second reflective sheet, wherein the colloid is fixed to the diffusion sheet, the light guiding film, the second reflective sheet and the assembling member.

11. The backlight module of claim 1, wherein the extension cover plate has a supporting portion, a gripping portion and a connecting portion formed between the supporting portion and the gripping portion, and a height of the supporting portion relative to the base plate is higher than a height of the gripping portion relative to the base plate.

12. A display, comprising:

a supporting member having a base plate and an extension cover plate over the base plate, wherein the base plate and the extension cover plate define an accommodating portion and a clamping portion in between;

a light source located at the accommodating portion;

a light guiding film located on the base plate, wherein an end of the light guiding film is located at the clamping portion, and the base plate comprises an extension portion exposed from the light guiding film;

a display element disposed on the light guiding film, wherein the display element and the light guiding film are adhered to each other; and

a colloid disposed on the extension portion, wherein the colloid is connected to the display element, the light guiding film and the extension portion.

13. The display of claim 12, wherein the extension cover plate has a supporting portion, a gripping portion and a connecting portion formed between the supporting portion and the gripping portion, a height of the supporting portion relative to the base plate is higher than a height of the gripping portion relative to the base plate, and the supporting portion abuts the display element.

14. The display of claim 12, wherein the base plate and the extension cover plate further form a gap in between, the gap is located between the accommodating portion and the clamping portion, and wherein a width of the gap is between about 1 mm and about 3 mm.

15. The display of claim 12, wherein the base plate has a first side portion and a second side portion, the first side portion extends to form the extension cover plate, and the second side portion extends to form the extension portion.

16. The display of claim 12, wherein the supporting member further comprises a side plate connected between the base plate and the extension cover plate, wherein the base plate, the side plate and the extension cover plate are integrally formed by a metallic structure.

17. The display of claim 12, further comprising a second reflective sheet and a diffusion sheet, wherein the light guiding film is located between the second reflective sheet and the diffusion sheet, the second reflective sheet is located between the light guiding film and the base plate, and wherein the diffusion sheet and the light guiding film are adhered to each other, and the light guiding film and the second reflective sheet are adhered to each other.

18. The display of claim 17, further comprising an assembling member located between the base plate and the second reflective sheet, wherein the colloid is fixed to the diffusion sheet, the light guiding film, the second reflective sheet and the assembling member.

19. The display of claim 12, wherein the extension cover plate comprises a reflective layer on a surface facing to the base plate.

20. The display of claim 12, wherein a width of the extension portion is between about 0.2 mm and about 0.5 mm, and a width of the colloid is equal to or smaller than the width of the extension portion.