Light source apparatus and display apparatus

• US 7,583,018 B2
• Filed: 06/29/2006
• Issued: 09/01/2009
• Est. Priority Date: 07/01/2005
• Status: Expired due to Fees

• Current Assignee: Saturn Licensing LLC (Sony Group Corp.)
• Original Assignee: Sony Corporation (Sony Group Corp.)
• Inventors: Izawa, Hisataka, Onouchi, Kazuyasu, Ohta, Masayuki, Fujino, Toyomi
• Primary Examiner(s): Patel; Vip
• Application Number:
  US11/427,557
• Publication Number:
  US 20070008722A1
• Time in Patent Office: 1,160 Days
• Field of Search: 362/231, 362/235, 362/296, 313/498
• US Class Current: 313/498
• 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 1/133609 including means for improving the color mixing, e.g. white
• CPC Class Codes: G02F 1/133611 including means for improving the brightness uniformity

Abstract

A light source apparatus and display apparatus are provided. The light source apparatus includes light-emitting devices for emitting lights of at least more than two kinds of colors and one light-emitting device group composed of the light-emitting devices located close to each other, wherein each of the light-emitting device group includes a plurality of light-emitting devices for emitting lights of at least more than one kind of color of more than two kinds of colors, a plurality of light-emitting devices being disposed such that central positions of light-emitting devices for emitting lights of respective colors are substantially matched with each other.

Claims

1. A light source apparatus comprising:

a light-emitting device group composed of a plurality of light-emitting diode chips for emitting lights of at least three colors, wherein for each of the at least three colors, the light-emitting diode chips for emitting light of that color form a light-emitting device color set, and wherein the light-emitting diode chips are located close to each other and are disposed symmetrically with respect to a central point such that, for each light-emitting device color set, a central position of the light-emitting diode chips forming the light-emitting device color set is coincident with the central point.

2. A light source apparatus according to claim 1, wherein said light source apparatus includes a plurality of said light-emitting device groups.

3. A light source apparatus according to claim 1, wherein said light-emitting device group includes an optical member having a substantially conical reflective surface disposed over said central point to reflect or refract light emitted from the light-emitting diode chips so that a radiated direction of said emitted light is changed.

4. A light source apparatus according to claim 3, wherein said light-emitting device group does not include a light-emitting diode chip disposed at said central point.

5. A light source apparatus according to claim 3, wherein said light-emitting device group includes said light-emitting diode chips disposed from said central point at an equal distance.

6. A light source apparatus according to claim 1, wherein said light-emitting device group includes at least a light-emitting diode chip for emitting red light, a light-emitting diode chip for emitting green light and a light-emitting diode chip for emitting blue light.

7. A light source apparatus according to claim 6, wherein said light-emitting device group includes a plurality of light-emitting diode chips for emitting green lights.

8. A light source apparatus according to claim 6, wherein said light-emitting device group includes a plurality of light-emitting diode chips for emitting red lights and a plurality of light-emitting diode chips for emitting green lights.

9. A light source apparatus according to claim 1, wherein said light-emitting device group includes said light-emitting diode chips for emitting lights of said at least three colors in which a light-emitting diode chip for emitting light of one color has an area larger than those of light-emitting diode chips for emitting lights of other colors.

10. A light source apparatus according to claim 6, wherein said light-emitting diode chip for emitting green light has an area larger than those of light-emitting diode chips for emitting lights of other colors.

11. A light source apparatus according to claim 6, wherein said light-emitting diode chip for emitting green light and said light-emitting diode chip for emitting red light each have areas larger than that of said light-emitting diode chip for emitting blue light.

14. A light source apparatus according to claim 1, wherein one of the light-emitting diode chips is disposed at said central point.

15. A light source apparatus according to claim 14, wherein said light-emitting device group further includes four light-emitting devices-diode chips disposed from said central point at an equal distance.

12. A display apparatus comprising:

a display portion; and

a light source apparatus for illuminating said display portion from a back side, wherein said light source apparatus includes a light-emitting device group composed of a plurality of light-emitting diode chips for emitting lights of at least three colors, wherein for each of the at least three colors, the light-emitting diode chips for emitting light of that color form a light-emitting device color set, and wherein the light-emitting diode chips are located close to each other and are disposed symmetrically with respect to a central point such that, for each light-emitting device color set, a central position of the light-emitting diode chips forming the light-emitting device color set is coincident with the central point.

13. A display apparatus according to claim 12, wherein said display portion is a color liquid-crystal display panel.

16. A display apparatus according to claim 12, wherein one of the light-emitting diode chips is disposed at said central point.

17. A display apparatus according to claim 16, wherein said light-emitting device group further includes four light-emitting diode chips disposed from said central point at an equal distance.