Display device and television apparatus

• US 10,527,779 B2
• Filed: 01/07/2019
• Issued: 01/07/2020
• Est. Priority Date: 10/25/2011
• Status: Active Grant

• Current Assignee: Maxell, 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, Kono, Akifumi
• Primary Examiner(s): Nguyen, Sang V
• Application Number:
  US16/241,079
• Publication Number:
  US 20190137683A1
• Time in Patent Office: 365 Days
• CPC Class Codes: G02B 6/0055 Reflecting element, 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: 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 1/133317 Intermediate frames, e.g. between backlight housing and front frame
• CPC Class Codes: G02F 1/13332 Front frames
• 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: H04N 5/44 Receiver circuitry for the reception of television signals according to analogue transmission standards H04N5/14 takes precedence
• CPC Class Codes: H04N 5/64 Constructional details of receivers, e.g. cabinets or dust covers furniture aspects of television cabinets A47B81/06
• CPC Class Codes: H04N 5/655 Construction or mounting of chassis, e.g. for varying the elevation of the tube

Abstract

A display device includes a light source, a reflection sheet, a display panel, and a supporting unit. The reflection sheet reflects light from the light source. The supporting unit supports the reflection sheet. The supporting unit has a first protruding portion that contacts with a first area of a rear facing surface of the reflection sheet within a predetermined distance from a center portion of the reflection sheet, a second protruding portion that contacts with a second area of the rear facing surface of the reflection sheet that is spaced apart from the first area and a third protruding portion that contacts with a third area of the rear facing surface of the reflection sheet that is spaced apart from the first and second areas, the third area being located between the first and second areas.

Claims

1. A display device comprising:

a light source;

a reflection sheet that reflects light from the light source;

a display panel; and

a supporting unit that supports the reflection sheet,

the supporting unit having a first protruding portion that contacts with a first area of a rear facing surface of the reflection sheet within a predetermined distance from a center portion of the reflection sheet, a second protruding portion that contacts with a second area of the rear facing surface of the reflection sheet that is spaced apart from the first area and a third protruding portion that contacts with a third area of the rear facing surface of the reflection sheet that is spaced apart from the first and second areas, the third area being located between the first and second areas.

2. The display device according to claim 1, wherein

the light source includes a plurality of light sources that is arranged along a first direction that is parallel to a display surface of the display panel,

the third protruding portion being located between the first and second protruding portions in a second direction that is parallel to the display surface of the display panel and is perpendicular to the first direction.

3. The display device according to claim 2, wherein

the second and third protruding portions extend in the first direction, respectively.

4. The display device according to claim 2, wherein

the first, second and third protruding portions are aligned with respect to each other as viewed in the second direction.

5. The display device according to claim 2, wherein

the first, second and third area of the rear facing surface of the reflection sheet are spaced apart from each other along a center line of the display device extending in the second direction.

6. The display device according to claim 1, further comprising

a display panel driving board arranged along a first direction that is parallel to a display surface of the display panel,

the third protruding portion being located between the first and second protruding portions in the first direction.

7. The display device according to claim 6, wherein

the second and third protruding portions extend in a second direction that is parallel to the display surface of the display panel and is perpendicular to the first direction, respectively.

8. The display device according to claim 6, wherein

the first, second and third protruding portions overlap with respect to each other as viewed in the first direction.

9. The display device according to claim 6, wherein

the first, second and third area of the rear facing surface of the reflection sheet are spaced apart from each other along a center line of the display device extending in the first direction.

10. The display device according to claim 1, wherein

the display panel has a rectangular shape,

the third protruding portion being located between the first and second protruding portions in a longitudinal direction of the display panel,

the display panel being, longer in the longitudinal direction of the display panel than in a transverse direction of the display panel.

11. The display device according to claim 10, wherein

the second and third protruding portions extend in the transverse direction of the display panel.

12. The display device according to claim 10, wherein

the first, second and third protruding portions overlap with respect to each other as viewed in the longitudinal direction of the display panel.

13. The display device according to claim 10, wherein

end edges of the first protruding portion in the longitudinal direction of the display panel linearly extend along a transverse direction of the display panel, respectively.

14. The display device according to claim 10, wherein

the first protruding portion is longer in the longitudinal direction of the display panel than in the transverse direction of the display panel.

15. The display device according to claim 10, wherein

the first, second and third area of the rear facing surface of the reflection sheet are spaced apart from each other along a center line of the display device extending in the longitudinal direction of the display panel.

16. The display device according to claim 1, further comprising

a cover member that at least partially covers a rear facing surface of the supporting unit.

17. The display device according to claim 16, wherein

the first protruding portion is located in an area that is covered by the cover member.

18. The display device according to claim 1, wherein

the supporting unit further has a plurality of circuit board attachment projections, the circuit board attachment projections projecting toward a rear side of the display device,

the first protruding portion being aligned with one of the circuit board attachment projections in a longitudinal direction of the display panel, and

the display panel being longer in the longitudinal direction of the display panel than in a transverse direction of the display panel.

19. The display device according to claim 1, wherein

the supporting unit further has a plurality of circuit board attachment projections, the circuit board attachment projections projecting toward a rear side of the display device,

the second and third protruding portions being aligned with one of the circuit board attachment projections in a longitudinal direction of the display panel, and

the display panel being longer in the longitudinal direction of the display panel than in a transverse direction of the display panel.

20. The display device according to claim 1, wherein

the first, second and third protruding portions bulge towards the reflecting sheet relative to portions of the supporting unit about the first, second and third protruding portions, respectively.