LIGHTING DEVICE, DISPLAY DEVICE AND TELEVISION RECEIVER

• US 20120327311A1
• Filed: 05/18/2010
• Published: 12/27/2012
• Est. Priority Date: 07/02/2009
• Status: Active Grant

• Current Assignee: Sharp Kabushiki Kaisha (Hon Hai Precision Industry Co., Ltd.)
• Original Assignee: Sharp Kabushiki Kaisha (Hon Hai Precision Industry Co., Ltd.)
• Inventors: Kuromizu, Yasumori
• Granted Patent: US 8,894,237 B2
• Time in Patent Office: Days
• US Class Current: 348/739
• CPC Class Codes: G02F 1/133603 with LEDs
• CPC Class Codes: G02F 1/133605 including specially adapted reflectors
• CPC Class Codes: G02F 1/133608 including particular frames or supporting means

Abstract

A backlight unit 12 according to the present invention includes an LED 17, an LED board 18, a connector 25, a chassis-side reflection sheet 22, and a support 26. The LED 17 is a light source. The LED 17 is mounted on the LED board 18. The connector 25 is a mounted component mounted on a mounting surface 18a of the LED board 18 on which the LED 17 is mounted. The chassis-side reflection sheet 22 is a reflection sheet 21 configured to reflect light and arranged on a side on which the mounting surface 18a is arranged. The mounting surface 18a is the surface on which the LED 17 and the connector 25 are mounted. The support 26 holds the chassis-side reflection sheet 22 away from the mounting surface 18a of the LED board 18.

Claims

1. A lighting device comprising:

a light source;

a light source board on which the light source is mounted;

a mounted component mounted on a mounting surface of the light source board, the mounting surface on which the light source is mounted;

a reflection member configured to reflect light and arranged on the mounting surface of the light source board, the mounting surface on which the light source and the mounted component are mounted; and

a support holding the reflection member away from the mounting surface of the light source board.

2. The lighting device according to claim 1, wherein the support is formed so as to hold the reflection member away from a surface of the mounted component, the surface being away from the light source board.

3. The lighting device according to claim 1, wherein the support is formed so as to hold the reflection member on a same plane on which a surface of the mounted component away from the light source board is located.

4. The lighting device according to claim 1, further comprising a chassis having an opening through which light from the light source exits and housing the light source board and the reflection member.

5. The lighting device according to claim 4, wherein the support is integrally provided with the chassis.

6. The lighting device according to claim 5, wherein the support is integrally formed with the chassis.

7. The lighting device according to claim 5, wherein:

the support includes a board-overlapping support arranged in an area overlapping the light source board in plan view; and

the light source board has a through hole through which the board-overlapping support portion is passed.

8. The lighting device according to claim 5, wherein the support includes at least one pair of board-non-overlapping supports arranged in areas not overlapping the light source board and on respective sides of the light source board in plan view.

9. The lighting device according to claim 8, wherein a plurality of the board-non-overlapping supports are arranged along outer edges of the light source board.

10. The lighting device according to claim 8, wherein the board-non-overlapping portions extend along outer edges of the light source board.

11. The lighting device according to claim 4, wherein:

the reflection member includes a board-side reflection member and a chassis-side reflection member, the board-side reflection member being overlaid on the mounting surface of the light source board, the chassis-side reflection member being arranged along an inner surface of the chassis and closer to the opening than the board-side reflection member; and

the support is formed so as to hold the chassis-side reflection member away from a surface of the board-side reflection member on an opening side.

12. The lighting device according to claim 4, further comprising a board holding member holding the light source board between the chassis and the board holding member.

13. The lighting device according to claim 12, wherein the support is integrally provided with the board holding member.

14. The lighting device according to claim 1, wherein the reflection member has a hole through which light from at least the light source passes, the hole being formed in an area overlapping the light source in plan view.

15. The lighting device according to claim 14, further comprising a diffuser lens configured to diffuse light from the light source, the diffuser lens being mounted in an area of the light source board overlapping the light source in plan view,

wherein the hole has a size that allows light at least from the diffuser lens to pass through.

16. The lighting device according to claim 15, wherein the support is formed so as to hold the reflection member away from the diffuser lens on a side away from the mounting surface of the light source board.

17. The lighting device according to claim 15, wherein:

the hole has a size that allows the diffuser lens to pass through; and

the support is formed so as to hold the reflection member such that the diffuser lens is arranged within the hole.

18. The lighting device according to claim 1, further comprising a holding member holding the reflection member between the support and the holding member.

19. The lighting device according to claim 18, wherein:

the support includes a with-hole support having a mounting hole; and

the holding member includes a body portion and a fixing portion, the body portion holding the reflection member between the with-hole support and the body portion, the fixing portion projecting from the body portion on a with-hole support side, and being passed through the mounting hole and held to an edge of the hole.

20. The lighting device according to claim 19, wherein the support includes a without-hole support not having a mounting hole in addition to the with-hole support.

21. The lighting device according to claim 1, wherein:

the light source board includes a plurality of light source boards; and

the mounted part includes a connecting component connecting the adjacent light source boards.

22. The lighting device according to claim 1, wherein the light source is an LED.

23. A display device comprising:

the lighting device according to claim 1; and

a display panel configured to provide display using light from the lighting device.

24. The display device according to claim 25, wherein the display panel is a liquid crystal display including a pair of substrates with liquid crystals sealed therebetween.

25. A television receiver comprising the display device according to claim 23.