Structure of LED illuminating apparatus

• US 20050083696A1
• Filed: 10/20/2003
• Published: 04/21/2005
• Est. Priority Date: 10/20/2003
• Status: Abandoned Application

• Current Assignee: United Microelectronics Corporation
• Original Assignee: United Microelectronics Corporation
• Inventors: Liu, Yi-Wei, Chiang, Po-Liang
• Application Number:
  US10/687,618
• Publication Number:
  US 20050083696A1
• Time in Patent Office: Days
• US Class Current: 362/268
• CPC Class Codes: G03B 21/2033 LED or laser light sources
• CPC Class Codes: G03B 21/208 Homogenising, shaping of the illumination light
• CPC Class Codes: H04N 9/3105 for displaying all colours simultaneously, e.g. by using two or more electronic spatial light modulators simultaneous projection in colour photography G03B33/10; beam splitting or combining systems per se G02B27/10
• CPC Class Codes: H04N 9/3114 by using a sequential colour filter producing one colour at a time
• CPC Class Codes: H04N 9/315 Modulator illumination systems general applications of lighting devices F21V; general optical systems G02B; lamp houses for projectors not peculiar to the presence of an electronic spatial light modulator G03B21/20

Abstract

The present invention provides a structure of an LED illuminating apparatus, which is used as the light source to prevent damage to the optical components by the UV and IR radiation emitted from the conventional UHP mercury lamp. The red, green, and blue monochromatic LED arrays emit desirable wavelengths such as the primary colors rather than starting with a broadband light source and filter out the undesired wavelengths of the conventional projector.

Claims

1. A structure of LED illuminating apparatus, comprising:

a plurality of LED modules; and

a cubical prism surrounded by said plurality of LED modules, arranged to integrate lights emitted from said plurality of LED modules.

2. The structure of LED illuminating apparatus according to claim 1, wherein said plurality of LED modules comprise a red LED module, a green LED module, and a blue LED module.

3. The structure of LED illuminating apparatus according to claim 2, wherein said red LED module comprises a red LED array and a corresponding condense lens, said condense lens is arranged between said red LED array and said cubical prism.

4. The structure of LED illuminating apparatus according to claim 2, wherein said green LED module comprises a green LED array and a corresponding condense lens, said condense lens is arranged between said green LED array and said cubical prism.

5. The structure of LED illuminating apparatus according to claim 2, wherein said blued LED module comprises a blue LED array and a corresponding condense lens, said condense lens is arranged between said blue LED array and said cubical prism.

6. The structure of LED illuminating apparatus according to claim 1 further comprising a lens module, arranged on a light outgoing side of said cubical prism.

7. The structure of LED illuminating apparatus according to claim 6 further comprising an optical integrator, arranged on a light outgoing side of said lens module.

8. The structure of LED illuminating apparatus according to claim 7, wherein said optical integrator comprise a first lens array and a second lens array.

9. The structure of LED illuminating apparatus according to claim 7 further comprising a polarization conversion system on a light outgoing side of said optical integrator.

10. A structure of projector with an LED illuminating apparatus, comprising:

a plurality of LED modules as a light source;

a plurality of LCD light valve panels, arranged to modulate lights emitted from said corresponding LED modules;

a cubical prism surrounded by said plurality of LCD light valve panels, arranged to integrate modulated lights transmitted from said plurality of LCD light valve panels; and

a lens module, arranged on a light outgoing side of said cubical prism.

11. The structure of projector with an LED illuminating apparatus according to claim 10, wherein said plurality of LED modules comprise a red LED module, a green LED module, and a blue LED module.

12. The structure of projector with an LED illuminating apparatus according to claim 11, wherein said red LED module comprises a red LED array and a corresponding condense lens, said condense lens is arranged between said red LED array and said corresponding LCD light valve panel.

13. The structure of projector with an LED illuminating apparatus according to claim 11, wherein said green LED module comprises a green LED array and a corresponding condense lens, said condense lens is arranged between said green LED array and said corresponding LCD light valve panel.

14. The structure of projector with an LED illuminating apparatus according to claim 11, wherein said blue LED module comprises a blue LED array and a corresponding condense lens, said condense lens is arranged between said blue LED array and said corresponding LCD light valve panel.

15. The structure of projector with an LED illuminating apparatus according to claim 10 further comprising an optical integrator, arranged on a light outgoing side of said lens module.

16. The structure of projector with an LED illuminating apparatus according to claim 15, wherein said optical integrator comprises a first lens array and a second lens array.

17. The structure of projector with an LED illuminating apparatus according to claim 15 further comprising a polarization conversion system on a light outgoing side of said optical integrator, arranged to raise the light utilization efficiency and project a color image to a projection screen.

18. A structure of projector with an LED illuminating apparatus, comprising:

a plurality of LED modules as a light source;

a plurality of LCOS light valve panels, arranged to modulate lights emitted from said corresponding LED modules;

a plurality of polarizing beam splitters, arranged to direct unmodulated lights emitted from said corresponding LED modules enter said corresponding of LCOS light valve panels;

a cubical prism surrounded by said plurality of polarizing beam splitters, arranged to integrate the modulated lights transmitted from said plurality of polarizing beam splitters; and

a lens module, arranged on a light outgoing side of said cubical prism.

19. The structure of projector with an LED illuminating apparatus according to claim 18, wherein said plurality of LED modules comprise a red LED module, a green LED module, and a blue LED module.

20. The structure of projector with an LED illuminating apparatus according to claim 19, wherein said red LED module comprises a red LED array and a corresponding condense lens, said condense lens is arranged between said red LED array and said corresponding polarizing beam splitter.

21. The structure of projector with an LED illuminating apparatus according to claim 19, wherein said green LED module comprises a green LED array and a corresponding condense lens, said condense lens is arranged between said green LED array and said corresponding polarizing beam splitter.

22. The structure of projector with an LED illuminating apparatus according to claim 19, wherein said blue LED module comprises a blue LED array and a corresponding condense lens, said condense lens is arranged between said blue LED array and said corresponding polarizing beam splitter.

23. The structure of projector with an LED illuminating apparatus according to claim 18 further comprising an optical integrator, arranged on a light outgoing side of said lens module.

24. The structure of projector with an LED illuminating apparatus according to claim 23, wherein said optical integrator comprises a first lens array and a second lens array.

25. The structure of projector with an LED illuminating apparatus s according to claim 23 further comprising a polarization conversion system on a light outgoing side of said optical integrator, arranged to raise the light utilization efficiency and project a color image to a projection screen.