Display with heat radiation

• US 9,910,213 B2
• Filed: 03/29/2017
• Issued: 03/06/2018
• Est. Priority Date: 10/12/2011
• Status: Active Grant

• Current Assignee: Funai Electric Co., Ltd.
• Original Assignee: Funai Electric Co., Ltd.
• Inventors: Yokawa, Akira, Kita, Yuki, Fujikawa, Akihiro, Fukumoto, Yasuyuki, Mori, Yasuhiro, Suzuki, Yuto, Horiuchi, Hirofumi, Tsuji, Hirohiko, Yamanaka, Takahito, Yonezawa, Hideo
• Primary Examiner(s): Dastouri, Mehrdad
• Assistant Examiner(s): CATTUNGAL, ROWINA J
• Application Number:
  US15/472,851
• Publication Number:
  US 20170199320A1
• Time in Patent Office: 342 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;

a light source portion;

an optical member;

a first heat radiation member contacting with said light source portion and supporting said optical member; and

a housing contacting with said first heat radiation member;

wherein said first heat radiation member includes a wall portion positioned near an end portion of said optical member and contacting with said light source portion, a first projecting portion positioned near said wall portion and contacting with a main surface of said optical member, and an extending portion positioned farther than said first projecting portion with respect to said wall portion and contacting with said housing,

said extending portion is separated from said main surface of said optical member,

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,

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

wherein 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 contacting with said light source portion in a direction perpendicular to a main surface of said display.

2. The display apparatus according to claim 1, wherein

said first heat radiation member includes a second projecting portion positioned farther than said extending portion with respect to said wall portion and contacting with said main surface of said optical member.

3. The display apparatus according to claim 1, wherein

a height of said wall portion with respect to said surface of said bottom portion contacting with said light source portion is substantially equal to a length of said light source portion in a direction perpendicular to said main surface of said display.

4. The display apparatus according to claim 1, wherein

said first heat radiation member includes a second projecting portion positioned farther than said extending portion with respect to said wall portion and contacting with said main surface of said optical member,

a height of said second projecting portion with respect to said 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 contacting with said light source portion in a direction perpendicular to said main surface of said display.

5. The display apparatus according to claim 1, wherein

said first heat radiation member includes a second projecting portion positioned farther than said extending portion with respect to said wall portion and contacting with said main surface of said optical member,

a height of said first projecting portion with respect to said surface of said bottom portion contacting with said light source portion is substantially equal to a height of said second projecting portion with respect to said surface of said bottom portion contacting with said light source portion in a direction perpendicular to said main surface of said display.

6. The display apparatus according to claim 1, wherein

a height of said extending portion with respect to said surface of said bottom portion contacting with said light source portion in a first direction toward said housing and perpendicular to said main surface of said display is higher than a height of said first projecting portion with respect to said surface of said bottom portion contacting with said light source portion in a second direction opposite to said first direction and perpendicular to said main surface of said display.

7. The display apparatus according to claim 1, wherein

said first heat radiation member includes a second projecting portion positioned farther than said extending portion with respect to said wall portion and contacting with said main surface of said optical member,

a height of said extending portion with respect to said surface of said bottom portion contacting with said light source portion in a first direction toward said housing and perpendicular to said main surface of said display is higher than a height of said second projecting portion with respect to said surface of said bottom portion contacting with said light source portion in a second direction opposite to said first direction and perpendicular to said main surface of said display.

8. The display apparatus according to claim 1, wherein

said surface of said bottom portion contacting with said light source portion is arranged substantially perpendicular to said surface of said wall portion contacting with said light source portion.

9. The display apparatus according to claim 1, further comprising a cover member covering said housing, and

said first heat radiation member is positioned at a region corresponding to a region of said housing exposed outward from said cover member as viewed from a surface side of said housing at which said cover member is positioned.

10. The display apparatus according to claim 9, wherein

said extending portion is arranged on a surface opposite to said surface of said housing at which said cover member is positioned.

11. The display apparatus according to claim 1, wherein

said first heat radiation member is mounted to said housing with a screw member.

12. The display apparatus according to claim 11, wherein

both of a surface of said first heat radiation member and a surface of said housing are in the form of planer surfaces in a circumference of a region where said screw member is mounted.

13. The display apparatus according to claim 1, wherein

said light source portion includes a LED source.

14. The display apparatus according to claim 1, further comprising a cover member covering said housing,

a circuit board mounted on a portion of said housing covered with said cover member, and

a second heat radiation member contacting with both said circuit board and said housing.

15. The display apparatus according to claim 14, wherein

a third projecting portion protruding toward an inner surface of said cover member is formed on a region of said housing corresponding to said circuit board while said circuit board is arranged on a surface of said third projecting portion through said second heat radiation member.

16. The display apparatus according to claim 15, wherein

a surface of said third projecting portion of said circuit board-side is in the form of a planar surface.

17. The display apparatus according to claim 15, wherein

said housing has a board mounting portion protruding toward said circuit board so that said circuit board is fixed thereto.