Light source system and projection system applied thereby

Patent metadata

Field	Value
Publication number	US-9500345-B2
Application number	US-201214346300-A
Country	US
Kind code	B2
Filing date	Aug 10, 2012
Priority date	Sep 22, 2011
Publication date	Nov 22, 2016
Grant date	Nov 22, 2016

Abstract

A light source system and a projection system employing the same. The light source system includes a light source emitting an excitation light, a moving device carrying a wavelength conversion material and an adjustment device. The excitation light irradiates on the wavelength conversion material. When the moving device is in a periodical moving state, the light spot position irradiated by the excitation light on the moving device moves following a first working track. The adjustment device is used for adjusting the light spot position irradiated by the adjusted excitation light on the moving device so that it moves following a second working track. The first working track is separated from the second working track. The system can reduce the working load of the wavelength conversion material on the first working track, thus slowing the aging of the wavelength conversion material, and improving the life of the light source system.

First claim

What is claimed is:

1. A light source system, comprising:
a light source emitting an excitation light;
a moving device carrying wavelength conversion materials, the excitation light illuminating the wavelength conversion materials; and
an adjusting device for adjusting a position of a light spot of the excitation light formed on the wavelength conversion materials to at least a first position and a second position,
wherein when the position of the light spot of the excitation light is adjusted to the first position and the moving device is in a periodic moving state, the light spot moves relative to the wavelength conversion materials periodically along a first working track on the wavelength conversion materials, and when the position of the light spot of the excitation light is adjusted to the second position and the moving device is in a periodic moving state, the light spot moves relative to the wavelength conversion materials periodically along a second working track on the wavelength conversion materials, wherein the first working track is separate from the second working track.

2. The light source system of claim 1 , wherein the adjusting device adjusts the light spot position when the moving device stops its periodic movement, and then triggers the moving device to resume its periodic movement after the adjustment.

3. The light source system of claim 1 , further comprising a control device for triggering the adjusting device to adjust the light spot position at regular time intervals.

4. The light source system of claim 1 , further including a detection system for detecting a light emission intensity from the wavelength conversion materials, and when the light emission intensity is below a predetermined value, sending a signal indicating aged materials to trigger the adjusting device to adjust the light spot position.

5. The light source system of claim 1 , wherein the adjusting device is coupled to the light source for causing the light source to shift or rotate so that the light spot position is displaced in a direction that intersects the first working track.

6. The light source system of claim 1 , wherein the adjusting device is coupled to the moving device for causing the moving device to shift or rotate so that the light spot position is displaced in a direction that intersects the first working track.

7. The light source system of claim 1 , further comprising an optical component disposed along a light path of the excitation light between the light source device and the moving device, wherein the adjusting device is coupled to the optical component for causing the optical component to shift or rotate so that the light spot is displaced in the a direction that intersects the first working track.

8. The light source system of claim 7 , wherein the optical component includes a prism or a reflecting mirror.

9. The light source system of claim 1 , wherein the adjusting device adjusts the light spot position so that it is displaced in a direction perpendicular to the first working track.

10. The light source system of claim 9 , wherein the moving device is a circular disk, and the first working track is a ring shape concentric with the moving device, and the adjusting device adjusts light spot to be displaced along to radial direction of the moving device.

11. A light source system, comprising a light source emitting an excitation light and a moving device carrying wavelength conversion materials, the excitation light illuminating the wavelength conversion materials, wherein when the moving device is in a first moving state, a light spot of the excitation light on the moving device moves periodically along a first direction, wherein the light source system further includes an adjusting device for continuously adjusting a position of the light spot back and forth along a second direction, the second direction intersects the first direction, wherein the adjusted light spot position moves periodically along a working track in a third direction that is a composite of the first and second directions, and wherein compared to the light spot that periodically moves in the first direction, any unit area on the working track is illuminated by the excitation light for a shorter amount of time within a given time period.

12. The light source system of claim 11 , wherein the adjusting device is coupled to the light source for adjusting the light source to continuously shift back and forth or rotate when the moving device is in the first moving state, so that the light spot position shifts continuously along the second direction.

13. The light source system of claim 11 , wherein the adjusting device is coupled to the moving device for adjusting the moving device to continuously shift back and forth or rotate when the moving device is in the first moving state, so that the light spot position shifts continuously along the second direction.

14. The light source system of claim 11 , further comprising an optical component disposed along a light path of the excitation light between the light source device and the moving device, wherein the adjusting device is coupled to the optical component for causing the optical component to continuously shift back and forth or rotate when the moving device is in the first moving state, so that the light spot is displaced in the second direction.

15. The light source system of claim 14 , wherein the optical component includes a prism or a reflecting mirror.

16. The light source system of claim 12 , wherein a period of the continuous back and forth shift or rotation is greater than or equal to twice a period of the light spot movement in the first direction.

17. The light source system of claim 11 , wherein then first direction is perpendicular to the second direction.

18. The light source system of claim 17 , wherein the moving device is a circular disk shape, wherein the first direction is an angular direction of the moving device and the second direction is a radial direction of the moving device.

19. A projection system comprising the light source system of claim 1 .

20. A projection system comprising the light source system of claim 11 .

Assignees

• Yang Yi
• Li Yi
• Appotronics (China) Corp

Inventors

• Yang Yi
• Li Yi

Classifications

• F21V9/45

  by adjustment of photoluminescent elements · CPC title

• F21V13/08

  the elements being filters or photoluminescent elements and reflectors · CPC title

• G03B21/16

  Cooling; Preventing overheating · CPC title

• G03B21/204

  using secondary light emission, e.g. luminescence or fluorescence (using different colours G03B33/00; if related to video signals H04N9/3197) · CPC title

• G01J1/0448

  Adjustable, e.g. focussing · CPC title