Display apparatus

Patent metadata

Field	Value
Publication number	US-10401679-B2
Application number	US-201715454240-A
Country	US
Kind code	B2
Filing date	Mar 9, 2017
Priority date	Mar 9, 2016
Publication date	Sep 3, 2019
Grant date	Sep 3, 2019

Abstract

The display apparatus reflects the light emitted from the light source to a display panel using a reflective member without a member such as a light guide plate. The reflective member is configured so that the light emitted from the light source can be provided uniformly and introduced uniformly to the display panel. Even if a board with the light source disposed at a side of the reflective member, the light emitted from the light source can be radiated substantially uniformly to the entire area of the display panel by the reflective surface of the reflective member.

First claim

What is claimed is:

1. A display apparatus comprising:
a display panel; and
a backlight unit configured to provide light to the display panel,
wherein the backlight unit comprises: a board on which a plurality of light sources are arranged; a first reflection member comprising a first reflective surface configured to diffusely reflect light emitted from the plurality of light sources toward the display panel; and a second reflection member comprising a second reflective surface disposed between the first reflection member and the plurality of light sources and configured to reflect the light emitted from the plurality of light sources toward the first reflection member;
wherein the first reflective surface comprises a polymer based material for diffusely reflecting light toward the display panel, and the second reflective surface comprises a metal based surface for regularly reflecting light from the light sources toward the first reflective surface,
wherein the second reflective surface is configured so that at least a part of the light emitted from the plurality of light sources and reflected toward the first reflective surface by the second reflective surface is parallel to the display panel
wherein the first reflective surface includes an upper reflective surface and a lower reflective surface to be configured to be concave toward the display panel, and
wherein the board is inclined with respect to the display panel so that a part of the light emitted from the plurality of light sources is radiated toward the display panel by being reflected by the lower reflective surface disposed on the upper side of the second reflection member and another part of the light emitted from the plurality of light sources is directly radiated toward the display panel.

2. The display apparatus according to claim 1 , wherein the board is inclined with respect to the display panel and the plurality of light sources are directed toward the second reflection member.

3. The display apparatus according to claim 1 , wherein the second reflective surface is concave toward the plurality of light sources.

4. The display apparatus according to claim 3 , wherein the second reflective surface of the second reflection member has a parabolic curved-surface shape.

5. The display apparatus according to claim 1 , wherein the second reflection member is disposed at the board.

6. The display apparatus according to claim 1 , wherein the board and the second reflection member are integrally formed with each other.

7. The display apparatus according to claim 1 , wherein the backlight unit further comprises a support structure configured to support the board, the first reflection member and the second reflection member.

8. The display apparatus according to claim 7 , wherein one side of the second reflection member is disposed at the board, and the other side of the second reflection member is coupled to the support structure.

9. A display apparatus comprising:
a display panel;
a top chassis provided at a front of the display panel;
a board disposed at a rear of the display panel and on which a plurality of light sources are disposed;
a bottom chassis disposed at the rear of the display panel and including a first reflective surface configured to diffusely reflect light emitted from the plurality of light sources toward the display panel; and
a reflection member comprising a second reflective surface and disposed between the first reflective surface and the plurality of light sources, the second reflective surface configured to regularly reflect the light emitted from the plurality of light sources toward the first reflective surface,
wherein the first reflective surface comprises a polymer based material for diffusely reflecting light toward the display panel, and the second reflective surface comprises a metal based surface for regularly reflecting light from the light sources toward the first reflective surface,
wherein the second reflective surface is configured so that at least a part of the light emitted from the plurality of light sources and reflected toward the first reflective surface by the second reflective surface is parallel to the display panel
wherein the first reflective surface includes an upper reflective surface and a lower reflective surface to be configured to be concave toward the display panel, and
wherein the board is inclined with respect to the display panel so that a part of the light emitted from the plurality of light sources is radiated toward the display panel by being reflected by the lower reflective surface disposed on the upper side of the second reflection member and another part of the light emitted from the plurality of light sources is directly radiated toward the display panel.

10. The display apparatus according to claim 9 , wherein the board is disposed at one side of the first reflective surface, such that the plurality of light sources are directed toward the bottom chassis.

11. The display apparatus according to claim 10 , wherein the board is disposed at a lower side of the bottom chassis and disposed, such that the plurality of light sources are directed toward a rear upper side.

12. The display apparatus according to claim 9 , wherein the reflection member is disposed at one side of the board, and the second reflective surface is concave toward the plurality of light sources and the first reflective surface.

13. The display apparatus according to claim 9 , wherein the board and the reflection member are disposed at the bottom chassis.

14. The display apparatus according to claim 9 , further comprising a support structure protruding toward a front of the bottom chassis,
wherein the board and the reflection member are disposed at the support structure.

15. The display apparatus according to claim 14 , wherein the support structure is integrally formed with the bottom chassis.

16. A display apparatus comprising:
a display panel;
a top chassis provided at a front of the display panel;
an optical sheet disposed at a rear of the display panel;
a diffusion plate disposed at a rear of the optical sheet;
a backlight unit disposed at a rear of the diffusion plate; and
a bottom chassis disposed at a rear of the backlight unit,
wherein the backlight unit comprises: a board on which a plurality of light sources are arranged; a first reflection member comprising a first reflective surface configured to diffusely reflect light emitted from the plurality of light sources toward the diffusion plate; and a second reflection member comprising a second reflective surface disposed between the first reflection member and the plurality of light sources and configured to regularly reflect the light emitted from the plurality of light sources toward the first reflection member,
wherein the first reflective surface comprises a polymer based material for diffusely reflecting light toward the display panel, and the second reflective surface comprises a metal based surface for regularly reflecting light from the light sources toward the first reflective surface,
wherein the second reflective surface is configured so that at least a part of the light emitted from the plurality of light sources and reflected toward the first reflective surface by the second reflective surface is parallel to the display panel
wherein the first reflective surface includes an upper reflective surface and a lower reflective surface to be configured to be concave toward the display panel, and
wherein the board is inclined with respect to the display panel so that a part of the light emitted from the plurality of l

Assignees

• Samsung Electronics Co Ltd

Inventors

• Cha Yong Dok
• Kim Jong Bin
• Na Jeong Shan
• Lee Young Chol
• Cho Jae Hak
• Hur Jean

Classifications

• G02F1/133615

  Edge-illuminating devices, i.e. illuminating from the side · CPC title

• G02F1/133606

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

• G02F1/133308

  Support structures for LCD panels, e.g. frames or bezels · CPC title

• G02F1/1336

  Illuminating devices · CPC title

• G02F1/133605 Primary

  including specially adapted reflectors · CPC title