DISPLAY APPARATUS

• US 20170315400A1
• Filed: 04/04/2017
• Published: 11/02/2017
• Est. Priority Date: 04/29/2016
• Status: Active Grant

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: AHN, Joon Seok, YOO, Jun-Mo
• Granted Patent: US 10,473,960 B2
• Time in Patent Office: Days
• CPC Class Codes: G02B 6/0051 Diffusing sheet or layer
• CPC Class Codes: G02B 6/0085 Means for removing heat created by the light source from the package heat extraction or cooling elements for semiconductor light sources in general H01L33/64
• CPC Class Codes: G02B 6/0088 of the light guide or other optical sheets in the package
• CPC Class Codes: G02B 6/009 of the light source in the package G02B6/0021 takes precedence
• CPC Class Codes: G02F 1/133308 Support structures for LCD panels, e.g. frames or bezels
• CPC Class Codes: G02F 1/133314 Back frames
• CPC Class Codes: G02F 1/13332 Front frames
• CPC Class Codes: G02F 1/133615 Edge-illuminating devices, i.e. illuminating from the side
• CPC Class Codes: G02F 1/133628 with cooling means

Abstract

The present invention relates to a display apparatus that does not include a middle mold and a rear chassis, and is capable of supporting an internal configuration of a display apparatus such as a display panel and a light guide plate with only a front chassis and a rear cover. It is possible to effectively dissipate heat by including a separate heat sink. In addition, heat generated from the electrical component substrate can be dissipated through the plate coupled to the electrical component substrate, the electromagnetic wave can be shielded, and the heat sink and the plate can be connected to improve the heat dissipation and electromagnetic wave shielding efficiency.

Claims

1. A display apparatus comprising:

a display panel;

a front chassis provided in front of the display panel;

an optical sheet disposed behind the display panel and supported by the front chassis;

a light guide plate disposed behind the optical sheet;

a light emitting diode (LED) substrate disposed beside the light guide plate and configured to emit light toward the light guide plate;

a rear cover configured to form an exterior of the display panel, the rear cover being coupled to a rear side of the front chassis, and configured to press the light guide plate toward the front chassis; and

a heat sink connected to the LED substrate to dissipate heat generated by the LED substrate and disposed between the light guide plate and the rear cover.

2. The display apparatus of claim 1, wherein the rear cover comprises a plastic material.

3. The display apparatus of claim 1, wherein the heat sink is provided in a plate shape having a first dimension extending in a direction corresponding to a longitudinal direction of the LED substrate and a second dimension having a shorter length than the first dimension.

4. The display apparatus of claim 2, wherein an area of the heat sink is smaller than that of the light guide plate.

5. The display apparatus of claim 1, further comprising a reinforcing member coupled to the rear cover to reinforce strength of the rear cover,

wherein at least one side of the reinforcing member is configured to be in contact with the heat sink.

6. The display apparatus of claim 1, wherein the rear cover comprises a plurality of ribs configured to protrude toward the front chassis and press the light guide plate toward the front chassis so that the light guide plate is supported by the front chassis.

7. The display apparatus of claim 1, wherein:

the front chassis comprises a hook configured to protrude toward the optical sheet to fasten the optical sheet; and

the optical sheet comprises a hook hole to accommodate the hook.

8. The display apparatus of claim 7, further comprising a reflective sheet provided behind the light guide plate,

wherein the reflective sheet is hooked by the hook and supported by the front chassis.

9. The display apparatus of claim 1, wherein:

the front chassis comprises a light guide plate support configured to protrude toward the light guide plate and support the light guide plate,

wherein the light guide plate support protrudes to a length corresponding to a combined thickness of the display panel and the optical sheet.

10. The display apparatus of claim 1, wherein:

the front chassis comprises an insertion protrusion configured to protrude toward the heat sink and support the heat sink; and

the heat sink comprises an insertion groove to accommodate the insertion protrusion for coupling the heat sink to the front chassis.

11. The display apparatus of claim 1, further comprising an electrical component substrate on which an electrical component is mounted,

wherein the electrical component substrate is coupled to the rear cover.

12. The display apparatus of claim 11, wherein a coupling plate provided to have an area corresponding to that of the electrical component substrate is provided at one side of the electrical component substrate.

13. The display apparatus of claim 11, wherein the electrical component substrate is disposed between the light guide plate and the rear cover.

14. The display apparatus of claim 11, wherein:

the electrical component substrate is disposed behind the rear cover; and

the rear cover includes an auxiliary cover configured to cover the electrical component substrate.

15. The display apparatus of claim 12, wherein the coupling plate is connected to the heat sink.

16. A display apparatus comprising:

a display panel;

a front chassis provided in front of the display panel;

a rear cover provided behind the display panel and coupled to the front chassis;

an optical sheet and a light guide plate provided between and supported by the front chassis and the rear cover;

a light emitting diode (LED) substrate disposed beside the light guide plate and configured to emit light toward the light guide plate;

a heat sink connected to the LED substrate to dissipate heat generated by the LED substrate; and

a reinforcing member coupled to the rear cover and connected to the heat sink to reinforce strength of the rear cover.

17. The display apparatus of claim 16, further comprising an electrical component substrate coupled to the rear cover, wherein:

an electrical component is mounted on the electrical component substrate; and

a coupling plate configured to reduce electromagnetic waves generated by the electrical component substrate is disposed at one side of the electrical component substrate.

18. The display apparatus of claim 17, wherein the coupling plate is connected to at least one of the heat sink and the reinforcing member.

19. The display apparatus of claim 16, wherein the front chassis and the rear cover are coupled to each other via a hook.

20. A display device comprising:

a display panel;

an optical sheet disposed behind and in direct contact with the display panel;

a light guide plate disposed behind and in direct contact with the display panel;

a reflective sheet disposed behind and in direct contact with the light guide;

a heat sink disposed behind and in direct contact with the reflective sheet;

a front bezel disposed in front of the display panel, the front bezel covering edges of the display panel; and

a rear cover disposed behind and in direct contact with the heat sink, the rear cover being configured to apply a pressure to the display panel, the optical sheet, the light guide plate, the reflective sheet, and the heat sink toward the front bezel.