Display with Heat Radiation

• US 20170199323A1
• Filed: 03/29/2017
• Published: 07/13/2017
• Est. Priority Date: 10/12/2011
• Status: Active Grant

• Current Assignee: Funai Electric Co., Ltd.
• Original Assignee: Funai Electric Co., Ltd.
• Inventors: FUKUMOTO, Yasuyuki, SUZUKI, Yuto, HORIUCHI, Hirofumi, KITA, Yuki, FUJIKAWA, Akihiro, YOKAWA, Akira, MORI, Yasuhiro, TSUJI, Hirohiko, YAMANAKA, Takahito, YONEZAWA, Hideo
• Granted Patent: US 9,921,366 B2
• Time in Patent Office: Days
• CPC Class Codes: G02B 6/0068 Arrangements of plural sources, e.g. multi-colour light sources
• CPC Class Codes: G02B 6/0073 Light emitting diode [LED]
• 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: G02F 1/133314 Back frames
• CPC Class Codes: G02F 1/133317 Intermediate frames, e.g. between backlight housing and front frame
• CPC Class Codes: G02F 1/133328 Segmented 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
• CPC Class Codes: G06F 1/20 Cooling means
• CPC Class Codes: H05K 1/0209 External configuration of printed circuit board adapted for heat dissipation, e.g. lay-out of conductors, coatings
• CPC Class Codes: H05K 2201/0162 Silicon containing polymer, e.g. silicone
• CPC Class Codes: H05K 2201/09909 Special local insulating pattern, e.g. as dam around component
• CPC Class Codes: H05K 7/20963 Heat transfer by conduction from internal heat source to heat radiating structure H05K7/20972 takes precedence

Abstract

This display includes a light source portion, a first heat radiation member for radiating heat generated by the light source portion, a rear housing covering the first heat radiation member in a state in contact with the first heat radiation member, and a cover member covering a rear surface of the rear housing so that the rear surface of the rear housing is partially exposed outward. The first heat radiation member is arranged on a region corresponding to a region of the rear housing exposed outward from the cover member as viewed from the side of the rear surface.

Claims

1. A display apparatus comprising:

a display;

an optical member;

a light source portion positioned near an end portion of said optical member; and

a heat radiation member contacting with said light source portion;

wherein said heat radiation member includes a first projecting portion contacting with a main surface of said optical member, and a second projecting portion which is separated from said first projecting portion and contacting with said main surface of said optical member,

a first distance between said end portion of said optical member and an end portion of a portion of said first projecting portion contacting with said main surface of said optical member that is closer to said end portion of said optical member is shorter than a second distance between said end portion of said optical member and an end portion of a portion of said second projecting portion contacting with said main surface of said optical member that is closer to said end portion of said optical member.

2. The display apparatus according to claim 1, wherein

a length of said portion of said first projecting portion contacting with said main surface of said optical member is shorter than a length of said portion of said second projecting portion contacting with said main surface of said optical member in a direction perpendicular to a longitudinal direction of said light source portion and parallel to said main surface of said optical member.

3. The display apparatus according to claim 1, wherein

said first distance is shorter than said second distance in a direction perpendicular to a longitudinal direction of said light source portion and parallel to said main surface of said optical member.

4. The display apparatus according to claim 1, wherein

each of said first projecting portion and said second projecting portion extends along a direction substantially parallel to a longitudinal direction of said light source portion.

5. The display apparatus according to claim 1, wherein

said first projecting portion and said second projecting portion are positioned in the vicinity of a center of said light source portion.

6. The display apparatus according to claim 5, wherein

said first projecting portion and said second projecting portion extend from a substantially central region of said light source portion to one side direction and other side direction along a longitudinal of said light source portion.

7. The display apparatus according to claim 1, wherein

said first projecting portion and said second projecting portion extend along a longitudinal of said light source portion.

8. The display apparatus according to claim 1, wherein

said heat radiation member curves in the vicinity of peripheral edge of said first projecting portion.

9. The display apparatus according to claim 1, wherein

said heat radiation member curves in the vicinity of peripheral edge of said second projecting portion.

10. The display apparatus according to claim 1, further comprising a housing, and

said heat radiation member includes an extending portion contacting with said housing,

a length of a portion of said extending portion contacting with said housing is longer than said first distance in a direction perpendicular to a longitudinal direction of said light source portion and parallel to said main surface of said optical member.

11. The display apparatus according to claim 10, wherein

said extending portion is positioned at substantially center in said longitudinal direction of said light source portion.

12. The display apparatus according to claim 11, wherein

said extending portion extends along a direction substantially parallel to said longitudinal direction of said light source portion.

13. The display apparatus according to claim 10, wherein

said heat radiation member includes a recess portion arranged between said extending portion and said main surface of said optical member.

14. The display apparatus according to claim 13, wherein

said recess portion has a shape tapered toward said housing.

15. The display apparatus according to claim 1, wherein

said heat radiation member includes a wall portion positioned near said end portion of said optical member and contacting with said light source portion.

16. The display apparatus according to claim 15, wherein

a surface of said wall portion contacting with said light source portion is arranged substantially perpendicular to said main surface of said optical member.

17. The display apparatus according to claim 16, wherein

said heat radiation member includes a bottom portion contacting with said light source portion and intersecting with said wall portion,

a height of said first projecting portion with respect to a surface of said bottom portion contacting with said light source portion is lower than a height of said wall portion with respect to said surface of said bottom portion in a direction perpendicular to a main surface of said display.

18. The display apparatus according to claim 1, further comprising a housing, and

said heat radiation member includes an extending portion contacting with said housing,

a length of a portion of said extending portion contacting with said housing is shorter than said second distance in a direction perpendicular to a longitudinal direction of said light source portion and parallel to said main surface of said optical member.