Light source device emitting light in rectangular shape

• US 20050195339A1
• Filed: 02/07/2005
• Published: 09/08/2005
• Est. Priority Date: 02/05/2004
• Status: Abandoned Application

• Current Assignee: NEC Corporation
• Original Assignee: NEC Corporation
• Inventors: Okumura, Fujio, Saitoh, Goroh
• Application Number:
  US11/050,893
• Publication Number:
  US 20050195339A1
• Time in Patent Office: Days
• US Class Current: 349/61
• CPC Class Codes: G02F 1/133605 including specially adapted reflectors
• CPC Class Codes: G02F 1/133621 providing coloured light G02F1/133617, G02F1/133533 take precedence
• CPC Class Codes: G02F 1/133622 Colour sequential illumination
• CPC Class Codes: G03B 21/20 Lamp housings
• CPC Class Codes: H04N 9/3152 for shaping the light beam beam shaping per se G02B27/09

Abstract

A light source device comprises a light source element including a light emitting element for emitting light mainly from a yz-plane in a three-dimensional orthogonal coordinate system defined by an x-axis, a y-axis, and a z-axis, and an element reflection plane for reflecting the light emitted from the light emitting element in the x-axis direction to head in a di rection parallel with the yz-plane, and a device reflection plane for reflecting the light emitted from the light source element in a direction parallel with the yz-plane to head in the y-axis direction.

Claims

1. A light source device comprising:

a light source element including a light emitting element for emitting light mainly from a yz-plane in a three-dimensional orthogonal coordinate system defined by an x-axis, a y-axis, and a z-axis, and an element reflection plane for reflecting the light emitted from said light emitting element in the x-axis direction to head in a direction parallel with the yz-plane; and

a device reflection plane for reflecting the light emitted from said light source element in a direction parallel with the yz-plane to head in the y-axis direction.

2. The light source device according to claim 1, further comprising a lens disposed in the y-axis direction of said light source element.

3. The light source device according to claim 2, wherein said lens is a convex cylindrical lens.

4. The light source according to claim 1, wherein said device reflection plane has a concave shape in the yz-plane and in planes parallel with the yz-plane.

5. The light source device according to claim 4, wherein:

said device reflection plane has a concave shape in an xy-plane of the three-dimensional orthogonal coordinate system and in planes parallel with the xy-plane;

said device reflection plane has a pair of end surfaces in the z-axis direction formed to be plane parallel with the xy-plane; and

said device reflection plane has a pair of end surfaces in the x-axis direction formed to be plane parallel with the yz-plane.

6. The light source device according to claim 4, wherein said concave shape is a parabolic shape.

7. The light source device according to claim 1, wherein the emitted light from said light source element is at least one of red, green, and blue in color.

8. The light source device according to claim 1, wherein the emitted light from said light source element is white in color.

9. The light source device according to claim 1, wherein said light emitting element is a light emitting diode.

10. A combined light source device comprising a plurality of light source units, each comprising said light source device according to claim 1, said plurality of light source units being two-dimensionally arranged in alignment to the y-axis direction.

11. A combined light source device comprising a plurality of light source units, each comprising said light source device according to claim 2, said plurality of light source units being two-dimensionally arranged in alignment to the y-axis direction, and said lens being shared by said plurality of light source units.

12. The combined light source device according to claim 10, wherein any of said plurality of light source units emits light in the same color.

13. The combined light source device according to claim 10, wherein said plurality of light source units emit light in different colors from one another.

14. An projector apparatus comprising:

the light source devices according to claim 1 each for emitting red, green, and blue light;

display means for displaying an image for each of a red component, a green component, and a blue component; and

projection means for projecting the image on a screen by irradiating said display means with light in the same color as the image of the color component which is displayed on said display means, wherein the light is emitted from the associated light source device.

15. The projector apparatus according to claim 14, wherein:

said light source devices each sequentially emits the light in each of the colors, and

said display means sequentially displays the image for each of the color components in synchronization with said light source devices.

16. The projector apparatus according to claim 14, wherein:

said light source devices each emits light in a single color from an overall surface of said light source device, and

the color component displayed by said display means is in a single color over an overall surface of said display means.

17. The projector according to claim 14, wherein:

said light source device is divided into a plurality of areas for each of the colors, and

said display means is divided into a plurality of areas for each of the color components.

18. An illuminator comprising the light source device according to claim 1 for emitting red, green, and blue light.

19. An illuminator comprising the light source device according to claim 1 for emitting white light.

20. A liquid crystal display comprising:

a transmission type liquid crystal display panel; and

a back light disposed on a back of said liquid crystal display panel, said back light including the illuminator according to claim 18.

21. The liquid crystal display according to claim 20, wherein:

said illuminator sequentially emits red, green, and blue light, and

said liquid crystal display panel sequentially displays images of a red component, a green component, and a blue component in synchronization with lighting of said illuminator.

22. The liquid crystal display according to claim 21, wherein said illuminator illuminates an overall panel with a single color, and said liquid crystal display panel displays the image of a single color component over an overall panel.

23. The liquid crystal display according to claim 21, wherein:

said illuminator has an overall surface divided into a plurality of areas for each of the colors, and

said liquid crystal display panel has an overall panel surface divided into a plurality of areas for each of the color components.