ILLUMINATION SYSTEM

• US 20120243205A1
• Filed: 01/20/2012
• Published: 09/27/2012
• Est. Priority Date: 03/23/2011
• Status: Active Grant

• Current Assignee: Delta Electronics Incorporated
• Original Assignee: Delta Electronics Incorporated
• Inventors: LIN, Hung-Ying
• Granted Patent: US 8,926,109 B2
• Time in Patent Office: Days
• US Class Current: 362/84
• CPC Class Codes: G03B 21/204 using secondary light emission, e.g. luminescence or fluorescence using different colours G03B33/00; if related to video signals H04N9/3197
• CPC Class Codes: G03B 21/2066 Reflectors in illumination beam in projection beam G03B21/28
• CPC Class Codes: G03B 33/08 Sequential recording or projection G03B33/02, G03B33/04, G03B33/06 take precedence
• CPC Class Codes: H04N 9/3111 for displaying the colours sequentially, e.g. by using sequentially activated light sources sequential projection in colour photography G03B33/08
• CPC Class Codes: H04N 9/3164 using multiple light sources

Abstract

An illumination system for use in a projector is provided. The illumination system comprises a first light source, a first timing controlling unit, a curved reflecting component and a wavelength converting component. The first light source provides a first wavelength light, while the first timing controlling unit divides the first wavelength light into a first timing portion and a second timing portion. The curved reflecting component comprises a focal point. The wavelength converting component is disposed at the focal point for converting the first timing portion of the first wavelength light into a second wavelength light.

Claims

1. An illumination system for a projector, comprising:

a first light source for providing a first wavelength light;

a first timing controlling unit for dividing the first wavelength light into a first timing portion and a second timing portion;

a curved reflecting component, having a focal point; and

a wavelength converting component, disposed at the focal point for converting the first timing portion of the first wavelength light into a second wavelength light.

2. The illumination system of claim 1, wherein the first timing controlling unit has at least one transmitting portion and at least one reflecting portion, the first wavelength light passes through the at least one transmitting portion to become one of the first timing portion and the second timing portion, and the first wavelength light is reflected on the at least one reflecting portion to become the other one of the first timing portion and the second timing portion.

3. The illumination system of claim 1, further comprising a second timing controlling unit for dividing the first timing portion of the first wavelength light into a third timing portion and a fourth timing portion, wherein the third timing portion and the second timing portion have the same timing.

4. The illumination system of claim 3, wherein the second timing controlling unit has a rotary disk, the curved reflecting component has an opening, the rotary disk passes through the opening to be partly located within the curved reflecting component, the rotary disk has at least one converting portion and at least one reflecting portion, the wavelength converting component is formed on the at least one converting portion, the wavelength converting component is intermittently disposed at the focal point with the rotation of the rotary disk so as to convert the fourth timing portion of the first timing portion of the first wavelength light into the second wavelength light, and the third timing portion is reflected on the at least one reflecting portion to become the second timing portion.

5. The illumination system of claim 1, wherein the first timing controlling unit has a mirror wheel or a polygonal reflecting mirror.

6. The illumination system of claim 4, wherein the second timing controlling unit has a mirror wheel or a polygonal reflecting mirror.

7. The illumination system of claim 1, wherein the wavelength converting component is a green phosphor.

8. The illumination system of claim 1, wherein the curved reflecting component has a curved surface, which is an ellipsoidal surface or a parabolic surface.

9. The illumination system of claim 1, wherein the curved reflecting component has at least one hole.

10. The illumination system of claim 9, wherein a color separating film is disposed on the at least one hole, the first wavelength light passes through the at least one hole via the color separating film, and the second wavelength light is reflected by the color separating film.

11. An illumination system for a projector, comprising:

two first light sources, each providing a first wavelength light;

a curved reflecting component, disposed between the two first light sources, and having two halves, a through groove and two transmitting portions, wherein the through groove is disposed between the two halves, and the two transmitting portions are disposed on the two halves respectively;

a timing controlling unit, having a rotary shaft and a rotary disk, wherein the rotary shaft is rotatable and the rotary disk is fixedly connected with the rotary shaft so that the rotary disk rotatably passes through the through groove; and

a plurality of wavelength converting components, disposed on the rotary disk, wherein each of the wavelength converting components converts the first wavelength light into another wavelength light.

12. The illumination system of claim 11, wherein the timing controlling unit has a first surface and a second surface opposite to the first surface, the first surface has a first converting portion, a second converting portion and a first reflecting portion, and the second surface has a third converting portion, a second reflecting portion and a third reflecting portion;

the wavelength converting components comprises a first wavelength converting component, a second wavelength converting component and a third wavelength converting component, the first wavelength converting component is disposed on the first converting portion, the second wavelength converting component is disposed on the second converting portion, and the third wavelength converting component is disposed on the third converting portion.

13. The illumination system of claim 12, further comprising an internal color separating mirror which is disposed within the curved reflecting component and connected with one of the halves, wherein the first surface of the timing controlling unit faces the half that is connected with the internal color separating mirror.

14. The illumination system of claim 12, wherein each of the first wavelength converting component, the second wavelength converting component and the third wavelength converting component is one of a green phosphor, a red phosphor and a yellow phosphor.

15. The illumination system of claim 12, wherein each of the first surface and the second surface has a transmitting portion for enabling the first wavelength light to pass therethrough.

16. The illumination system of claim 12, wherein each of the first reflecting portion, the second reflecting portion and the third reflecting portion is provided with a color separating film so as to enable the first wavelength light to pass through the first reflecting portion, the second reflecting portion or the third reflecting portion;

and the first converting portion is opposite to the second reflecting portion, the second converting portion is opposite to the third reflecting portion, and the third converting portion is opposite to the first reflecting portion, so as to enable the first wavelength light to impinge on the first converting portion, the second converting portion or the third converting portion after passing through the first reflecting portion, the second reflecting portion or the third reflecting portion.

17. The illumination system of claim 16, wherein the third converting portion is partly provided with the third wavelength converting component.

18. The illumination system of claim 11, wherein the curved reflecting component has at least one curved surface, which is an ellipsoidal surface or a parabolic surface.

19. The illumination system of claim 11, wherein each of the two transmitting portions is a through hole or a transparent material.

20. The illumination system of claim 11, wherein the curved reflecting component is made of a transparent material, and a color separating film is disposed on a surface of the curved reflecting component for enabling the first wavelength light to pass through the curved reflecting component.