Lighting device, display device, and television device

• US 9,127,814 B2
• Filed: 09/01/2011
• Issued: 09/08/2015
• Est. Priority Date: 09/06/2010
• 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: Nozawa, Shinnosuke
• Primary Examiner(s): Sawhney, Hargobind S
• Application Number:
  US13/820,577
• Publication Number:
  US 20130162915A1
• Time in Patent Office: 1,468 Days
• Field of Search: 362 971- 974, 362/249.01, 362/249.02, 362/561, 362/23.16, 362/23.19, 349/57, 349/58, 349/61, 349/62, 349/64, 349/65
• US Class Current: 1/1
• CPC Class Codes: F21K 9/00 Light sources using semiconductor devices as light-generating elements, e.g. using light-emitting diodes [LED] or lasers
• CPC Class Codes: G02F 1/133603 with LEDs
• CPC Class Codes: G02F 1/133608 including particular frames or supporting means
• CPC Class Codes: H01L 2924/00 Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
• CPC Class Codes: H01L 2924/0002 Not covered by any one of groups H01L24/00, H01L24/00 and H01L2224/00
• CPC Class Codes: H01L 33/486 adapted for surface mounting

Abstract

An object of this invention is to provide a lighting device in which a predetermined distance between the LED units and the optical member can be maintained without increasing the number of the parts, and to provide a display device, and a television device including the same. The lighting device includes a chassis 21, an LED unit 30, and an optical member 22. The chassis 21 houses the LED unit 30. The LED unit 30 includes an LED package 31 and a printed circuit board 32. The LED package 31 is mounted on the LED package 31. The LED package 31 includes an LED chip sealed therein and a spacer portion 37. The optical member 22 is arranged opposite the LED package 31. The spacer portion 37 is in contact with and maintains the optical member 22 having a predetermined distance away from the LED package 31.

Claims

1. A lighting device comprising:

a chassis;

an LED unit housed in the chassis and including an LED package, a printed circuit board, and at least one spacer portion; and

an optical member including an opposing surface, wherein

the LED package includes and LED chip and is mounted on the printed circuit board such that the LED package is opposite to the opposing surface of the optical member and located a predetermined distance away from the optical member;

the at least one spacer portion projects from the LED package in a projecting direction such that an axis of the spacer portion in the projecting direction is oblique to the opposing surface of the optical member;

the at least one spacer portion is in contact with the optical member to maintain the Predetermined distance between the LED package and the optical member; and

the LED package and the at least one spacer portion are integrally formed as a unitary single part.

2. The lighting device according to claim 1, wherein

the LED package includes a light emitting portion and a base portion, the light emitting portion including the LED chip sealed therein, the base portion extending over sides of the light emitting portion and being connected with the printed circuit board, and

the at least one spacer portion from the base portion.

3. The lighting device according to claim 1, wherein the at least one spacer portion is elastically in contact with the opposing surface of the optical member at an angle to the opposing surface different from the angle at which the at least one spacer portion projects.

4. The lighting device according to claim 1, the at least one spacer portion of the LED package is a single spacer portion.

5. The lighting device according to claim 1, the at least one spacer portion includes a plurality of spacer portions.

6. The lighting device according to claim 5, the plurality of spacer portions are arranged symmetric about the light emitting portion.

7. The lighting device according to claim 1, wherein

the lighting device is a lighting device for a display device including a display panel,

the optical member is arranged opposite the display panel, and

the LED unit is arranged adjacent to a surface of the optical member opposite from a surface thereof facing the display panel.

8. The lighting device according to claim 1, wherein

the lighting device is a lighting device for display device including a display panel,

the optical member is arranged opposite the display panel, and

the LED unit is arranged adjacent to a side of the optical member that faces the display panel.

9. A display device comprising:

the lighting device according to claim 1; and

a display panel for providing display using light from the lighting device.

10. The display device according to claim 9, wherein the display panel is a liquid crystal panel using liquid crystals.