Direct type back-light module and display device having a frameless visual effect

Patent metadata

Field	Value
Publication number	US-10852586-B2
Application number	US-202016826315-A
Country	US
Kind code	B2
Filing date	Mar 23, 2020
Priority date	Apr 1, 2019
Publication date	Dec 1, 2020
Grant date	Dec 1, 2020

Abstract

A direct type backlight module includes a back plate, a light emitting element, and a frame body. The light emitting element is disposed on the back plate and configured to provide an illumination beam. The frame body is disposed on the back plate to surround the light emitting element. The frame body includes a light transmitting portion and a reflecting portion. The light transmitting portion is located at an edge of a light emitting side of the direct type backlight module. The reflecting portion is located between the light transmitting portion and the back plate. The light transmitting portion has a carrier portion, wherein the illumination beam is configured to be transmitted into the light transmitting portion, transmitted to the carrier portion of the light transmitting portion by reflection of the reflecting portion, and then emitted. A display device including the direct type backlight module is also provided.

First claim

What is claimed is:

1. A direct type backlight module comprising a back plate, a light emitting element, and a frame body, wherein
the light emitting element is disposed on the back plate and is configured to provide an illumination beam, and
the frame body is disposed on the back plate to surround the light emitting element, the frame body comprises a light transmitting portion and a reflecting portion, the light transmitting portion is located at an edge of a light emitting side of the direct type backlight module, the reflecting portion is located between the light transmitting portion and the back plate, and the light transmitting portion has a carrier portion, wherein the illumination beam is configured to be transmitted into the light transmitting portion, transmitted to the carrier portion of the light transmitting portion by reflection of the reflecting portion, and then emitted.

2. The direct type backlight module according to claim 1 , wherein the reflecting portion has a first optical surface inclined to an overall extending direction of the direct type backlight module, and the light transmitting portion is connected to the reflecting portion and covers the first optical surface.

3. The direct type backlight module according to claim 1 , wherein the light transmitting portion has a second optical surface parallel to an overall extending direction of the direct type backlight module, and the second optical surface has a prism structure.

4. The direct type backlight module according to claim 1 , further comprising at least one optical element, wherein the carrier portion carries the at least one optical element.

5. The direct type backlight module according to claim 4 , wherein the at least one optical element comprises a diffusion element and at least one optical film.

6. The direct type backlight module according to claim 1 , wherein the reflecting portion and the light transmitting portion are made of different materials and are simultaneously manufactured.

7. The direct type backlight module according to claim 1 , wherein the frame body further comprises an adhesive layer connected between the light transmitting portion and the reflecting portion to fix the light transmitting portion and the reflecting portion.

8. The direct type backlight module according to claim 1 , wherein both the light transmitting portion and the reflecting portion have at least one engaging structure, and the light transmitting portion and the reflecting portion are combined by the at least one engaging structure thereof.

9. The direct type backlight module according to claim 1 , wherein the frame body further comprises a light transmitting buffer member connected to a top end of the light transmitting portion, and the light transmitting portion is located between the light transmitting buffer member and the reflecting portion.

10. The direct type backlight module according to claim 1 , wherein the reflecting portion is made of a white material having a reflecting property.

11. The direct type backlight module according to claim 1 , wherein the frame body further comprises a light transmitting support member disposed on the light transmitting portion to support a part of the light transmitting portion.

12. The direct type backlight module according to claim 11 , wherein the light transmitting support member and the light transmitting portion are made of the same material and are integrally manufactured.

13. A display device comprising a direct type backlight module and a display panel, wherein
the direct type backlight module is configured to provide an illumination beam and comprises a back plate, a light emitting element, and a frame body, wherein
the light emitting element is disposed on the back plate and is configured to provide the illumination beam, and
the frame body is disposed on the back plate to surround the light emitting element, the frame body comprises a light transmitting portion and a reflecting portion, the light transmitting portion is located at an edge of a light emitting side of the direct type backlight module, the reflecting portion is located between the light transmitting portion and the back plate, and the light transmitting portion has a carrier portion, and

the display panel is disposed on a transmission path of the illumination beam and on the frame body, wherein the illumination beam is configured to be transmitted into the light transmitting portion, transmitted to the carrier portion of the light transmitting portion by reflection of the reflecting portion, and then emitted to an edge of the display panel.

14. The display device according to claim 13 , wherein the reflecting portion has a first optical surface inclined to an overall extending direction of the direct type backlight module, and the light transmitting portion is connected to the reflecting portion and covers the first optical surface.

15. The display device according to claim 13 , wherein the light transmitting portion has a second optical surface parallel to an overall extending direction of the direct type backlight module, and the second optical surface has a prism structure.

16. The display device according to claim 13 , further comprising at least one optical element, wherein the carrier portion carries the at least one optical element.

17. The display device according to claim 15 , further comprising:
a connecting element disposed on the second optical surface and connected between at least one optical element and the light transmitting portion.

18. The display device according to claim 13 , wherein the light transmitting portion is trimmed flush with the display panel.

19. The display device according to claim 13 , wherein the display panel is a liquid crystal display panel.

20. The display device according to claim 16 , wherein the at least one optical element comprises a diffusion element and at least one optical film.

Assignees

• Coretronic Suzhou Co Ltd
• Coretronic Corp

Inventors

• Li Bin
• Tsao Liang-Kuo
• Feng Hua-Te
• Yang Wen-Pin

Classifications

• G02F1/133317

  Intermediate frames, e.g. between backlight housing and front frame · CPC title

• G02F1/133606

  including a specially adapted diffusing, scattering or light controlling members · CPC title

• G02F1/133608 Primary

  including particular frames or supporting means · CPC title

• G02F2203/01

  transmissive · CPC title

• G02F1/133605

  including specially adapted reflectors · CPC title