Display device

Patent metadata

Field	Value
Publication number	US-9366803-B2
Application number	US-201414154869-A
Country	US
Kind code	B2
Filing date	Jan 14, 2014
Priority date	Jul 4, 2013
Publication date	Jun 14, 2016
Grant date	Jun 14, 2016

Abstract

A display device includes: a light guide member under the display panel and including a light incident surface; a heat discharge member including a heat discharge surface which extends in a first direction opposite to the light incident surface of the light guide member, and a first flat surface which extends in a second direction from the heat discharge surface; and a light source on the heat discharge member, which provides light to the light incident surface and includes a light emitting device on the heat discharge surface and including a light emitting surface opposite to the light incident surface, a circuit board on the first flat surface of the heat discharge member and electrically connected to the light emitting device, and a heat discharge portion on the heat discharge member and which couples the light emitting device to the heat discharge surface of the heat discharge member and discharges a heat generated from the light emitting device.

First claim

What is claimed is:

1. A display device comprising:
a protective member;
a display panel disposed in the protective member;
a light guide member disposed under the display panel, wherein the light guide member comprises a light incident surface;
a heat discharge member comprising:
a heat discharge surface and a first flat surface bent from the heat discharge surface, wherein the heat discharge surface disposed opposite to the light incident surface of the light guide member in a first direction in a cross section view, and the heat discharge surface extending in a second direction in the cross section view different from the first direction; and
the first flat surface which extends in the first direction in the cross section view; and

a light source which is disposed on the heat discharge member, provides a light to the light incident surface, and
the light source comprises:
a light emitting device disposed on the heat discharge surface, wherein the light emitting device comprises a light emitting surface disposed opposite to the light incident surface;
a circuit board disposed on the first flat surface of the heat discharge member and electrically connected to the light emitting device; and
a heat discharge portion which is disposed on the heat discharge member, couples the light emitting device to the heat discharge surface of the heat discharge member, and discharges a heat generated from the light emitting device.

2. The display device of claim 1 , wherein the light guide member further comprises:
a first surface, from which the light incident to the light guide member through the light incident surface exits to the display panel;
a second surface disposed opposite to the first surface; and
a plurality of connection surfaces which connects the first surface and the second surface, wherein the light incident surface is defined by one of the connection surfaces.

3. The display device of claim 2 , wherein the light incident surface is disposed at a corner of the light guide member.

4. The display device of claim 1 , wherein
the light source further comprises first and second conductive portions which electrically connect the circuit board to the light emitting device, and
the first and second conductive portions are insulated from the heat discharge portion.

5. The display device of claim 4 , wherein the heat discharge portion is spaced apart from the first and second conductive portions.

6. The display device of claim 1 , wherein the light emitting device further comprises:
a light emitting diode which defines the light emitting surface; and
a body portion comprising:
a first surface on which the light emitting diode is disposed; and
a second surface attached to the heat discharge surface of the heat discharge member.

7. The display device of claim 6 , wherein
the heat discharge portion is disposed through and within the body portion, and
the light emitting diode is disposed directly on the heat discharge portion.

8. The display device of claim 1 , wherein
the light emitting device further comprises a plurality of light emitting diodes disposed to be spaced apart from each other, and
the light emitting diodes are disposed on the heat discharge portion.

9. The display device of claim 8 , wherein
the heat discharge portion comprises a plurality of sub-heat discharge portions insulated from each other and corresponding to the light emitting diodes, respectively, and
each of the sub-heat discharge portions comprises:
a first surface on which a corresponding light emitting diode of the light emitting diodes is disposed; and
a second surface coupled to the heat discharge surface of the heat discharge member.

10. The display device of claim 1 , wherein the heat discharge member further comprises a second flat surface which extends in the second direction from the heat discharge surface and is disposed opposite to the first flat surface.

11. The display device of claim 10 , wherein the circuit board is in contact with the first flat surface.

12. The display device of claim 10 , wherein the circuit board is in contact with the second flat surface.

13. The display device of claim 12 , wherein the circuit board comprises a reflective layer disposed on a surface thereof which is disposed opposite to the light guide member.

14. A display device comprising:
a protective member;
a display panel disposed in the protective member;
a light guide member disposed under the display panel, wherein the light guide member comprises: a first surface, a second surface, and a light incident surface which connected the first and second surfaces;
a heat discharge member comprising:
a side surface portion comprising a heat discharge surface disposed opposite to the light incident surface and the heat discharge surface which extends in a first direction; and
a first extension portion which extends in second direction different from the first direction, and the first extension portion which extends from the side surface portion and is disposed opposite to a lower surface of the light guide member; and

a light source comprising:
a light emitting device coupled to the side surface portion of the heat discharge member; and
a circuit board disposed on the first extension portion of the heat discharge member and electrically connected to the light emitting device,

wherein the light emitting device comprises:
a light emitting diode;
a first conductive portion insulated from the side surface portion of the heat discharge member and electrically connected to the light emitting diode;
a second conductive portion insulated from the side surface portion of the heat discharge member and electrically connected to the light emitting diode; and
a heat discharge portion insulated from the first and second conductive portions, the heat discharge portion comprising:
a first surface on which the light emitting diode is disposed, and a second surface coupled to the side surface portion of the heat discharge member.

15. The display device of claim 14 , wherein the second surface of the heat discharge portion is in direct contact with the heat discharge surface.

16. The display device of claim 14 , wherein the heat discharge portion is spaced apart from the first and second conductive portions.

17. The display device of claim 14 , wherein
the heat discharge member further comprises a second extension portion which extends in the second direction from the side surface portion and is disposed opposite to the first extension portion, and
the light guide member is disposed between the first extension portion and the second extension portion.

18. The display device of claim 17 , wherein
the first extension portion is disposed on the first surface of the light guide member, and
the circuit board is disposed between the first extension portion and the light guide member.

19. The display device of claim 17 , wherein
the first extension portion is disposed on the second surface the light guide member, and
the circuit board is disposed between the first extension portion and the light guide member.

20. A display device comprising:
a protective member;
a display panel disposed in the protective member;
a light guide member disposed under the display panel, wherein the light guide member comprises a light incident surface;
a heat discharge member comprising:
a side surface portion including a heat discharge surface disposed opposite to the light incident surface, and the heat discharge s

Assignees

• Samsung Display Co Ltd

Inventors

• Yang Jung-Hyun
• Park Young-Min
• Nam Seokhyun
• Park Seki
• Shin Ho-Sik

Classifications

• G02B6/0085 Primary

  Means for removing heat created by the light source from the package · CPC title

• G02B6/0083

  Details of electrical connections of light sources to drivers, circuit boards, or the like · CPC title

• G02B6/0031

  Reflecting element, sheet or layer · CPC title

• H05K7/20 Primary

  Modifications to facilitate cooling, ventilating, or heating · CPC title

• G09F9/00

  Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements (in which the variable information is permanently attached to a movable support G09F11/00; abacus G06C1/00; slide-rules G06G1/00) · CPC title