LIGHTING DEVICE, DISPLAY DEVICE AND TELEVISION RECEIVER

• US 20120293724A1
• Filed: 11/02/2010
• Published: 11/22/2012
• Est. Priority Date: 11/12/2009
• 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: Ueyama, Munetoshi
• Granted Patent: US 8,998,442 B2
• Time in Patent Office: Days
• US Class Current: 348/739
• CPC Class Codes: G02B 6/0046 Tapered light guide, e.g. wedge-shaped light guide
• 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 6/0078 Side-by-side arrangements, e.g. for large area displays
• CPC Class Codes: G02B 6/0083 Details of electrical connections of light sources to drivers, circuit boards, or the like
• CPC Class Codes: G09G 2300/0426 Layout of electrodes and connections
• CPC Class Codes: G09G 3/34 by control of light from an independent source

Abstract

A lighting device having a simplified connection configuration between light sources and a light source driver is provided. A backlight unit 12 according to this invention includes a plurality of LED boards 18 on which LEDs 17 are mounted. The LEDs 17 are light sources. Each LED board 18 includes a connection wiring pattern 27 electrically connected to the LEDs 17 and a through wiring pattern 28 not electrically connected to the LEDs 17. The connection wiring pattern 27 is connected to the through wiring pattern 28 on the other LED board 18. The connection wiring pattern 27 of each LED board 18 electrically connected to the LEDs 17 is electrically connected to the through wiring pattern 28 of the other LED board 18 not electrically connected to the LEDs 17.

Claims

1. A lighting device comprising a plurality of light source boards including light sources mounted thereon, each light source board including a connection wiring pattern and a through wiring pattern, the connection wiring pattern being electrically connected to the light source and the through wiring pattern of the other light source board, the through wiring pattern not being electrically connected to the light source.

2. The lighting device according to claim 1, wherein

each light source board includes a first terminal portion at one end and a second terminal portion at another end, the first terminal portion including a first connection terminal and a first through terminal arranged adjacent to each other, the first terminal portion being provided at an end of the connection wiring pattern, the first through terminal being provided at an end of the through wiring pattern, the second terminal portion including a second connection terminal and a second through terminal arranged adjacent to each other, the second connection terminal being provided at another end of the connection wiring pattern, the second through terminal being provided at another end of the through wiring pattern, and

the connection wiring pattern and the through wiring pattern include an intersection such that an arrangement of the first connection terminal and the first through terminal in the first terminal portion is different from an arrangement of the second connection terminal and the second through terminal in the second terminal portion.

3. The lighting device according to claim 2, wherein

the light source boards include at least a first light source board, a second light source board, and a third light source board, each including at least two through wiring patterns,

the connection wiring pattern of the first light source board is connected to any one of the through wiring patterns of the second light source board and any one of the through wiring patterns of the third light source board, and

the at least two through wiring patterns of the first light source board is connected to the connection wiring pattern of the second light source board and the through wiring patterns of the second light source board other than the through wiring pattern connected to the connection wiring pattern of the first light source board, respectively, and to the connection wiring pattern of the third light source board and the through wiring patterns of the third light source board other than the through wiring pattern connected to the connection wiring pattern of the first light source board, respectively.

4. The lighting device according to claim 2, wherein each light source board includes a connector having the first terminal portion and a connector joint having the second terminal portion and plugged into the connector of the other light source board.

5. The lighting device according to claim 3, further comprising a first relay component and a second relay component, the first relay component relay-connecting the second terminal portion of the first light source board to the first terminal portion of the second light source board, the second relay component relay-connecting the second terminal portion of the second light source board to the second terminal portion of the third light source board, the first relay component including a plurality of parallel relay wiring patterns parallel to each other and connected to the second terminal portion of the first light source board and the first terminal portion of the second light source board, the second relay component including a plurality of crossing relay wiring patterns crossing each other and connected to the second terminal portion of the second light source board and the second terminal portion of the third light source board.

6. The lighting device according to claim 5, wherein

the first light source board and the second light source board are arranged such that the second terminal portion of the first light source board and the first terminal portion of the second light source board are adjacent to each other, and

the second light source board and the third light source board are arranged in a direction crossing an arrangement direction in which the first light source board and the second light source board are arranged.

7. The lighting device according to claim 5, wherein

the light source boards include first connectors having the first terminal portions and second connectors having the second terminal portions, and

the first relay component and the second relay component are plugged into the first connectors and the second connectors.

8. The lighting device according to claim 1, further comprising at least one light guide member arranged opposite light emitting surfaces of the light sources.

9. The lighting device according to claim 8, wherein the at least one light guide member includes a plurality of light guide members corresponding to the light source boards, the light guide members being arranged parallel to each other.

10. The lighting device according to claim 8, wherein the at least one light guide member has a light entrance surface and a light exit surface, the light entrance surface being opposite the light emitting surfaces and through which light enters, the light exit surface through which the light exits and extending in a direction crossing the light entrance surface and parallel to an arrangement direction in which the light sources and the light entrance surface are arranged.

11. The lighting device according to claim 1, wherein the light sources are LEDs.

12. The lighting device according to claim 1, further comprising a light source driver electrically connected to the light source boards.

13. 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.

14. The display device according to claim 13, wherein the display panel is a liquid crystal display including a pair of substrates with liquid crystals sealed therebetween.

15. A television receiver comprising the display device according to claim 13.