Laser projection system

• US 20100110389A1
• Filed: 11/03/2009
• Published: 05/06/2010
• Est. Priority Date: 11/05/2008
• Status: Abandoned Application

• Current Assignee: Young Optics, Inc. (Coretronic Corporation)
• Original Assignee: Young Optics Company Limited
• Inventors: Liao, Cheng-Shun, Cheng, Chu-Ming, Chen, S-Wei
• Application Number:
  US12/588,944
• Publication Number:
  US 20100110389A1
• Time in Patent Office: Days
• US Class Current: 353/31
• CPC Class Codes: G02B 27/1033 having a single light modulator for all colour channels
• CPC Class Codes: G02B 27/141 using dichroic mirrors
• CPC Class Codes: G02B 27/48 Laser speckle optics
• CPC Class Codes: G03B 21/14 Details
• CPC Class Codes: G03B 21/2033 LED or laser light sources

Abstract

A laser projection system includes a plurality of laser light sources, a light combining module, an image generating module, a lens, a diffusion module. and a projection lens. The laser light sources are used to provide a plurality of light beams with different colors. The light combining module is disposed in the light path of the laser beams for mixing the laser beams to form a mixing light beam. The image generating module is disposed in the light path of the mixing light beam for receiving the mixing light beam to generate a first image. The lens is disposed in the light path of the first image and provides an imaging position. The first image passes through the lens to form a second image at the imaging position. The diffusion module includes a diffuser and an actuator. The projection lens projects the second image on a screen.

Claims

1. A laser projection system, comprising:

a plurality of laser light sources, for providing a plurality of laser light beams with different colors;

a light combining module, disposed in the light path of the laser light beams for mixing the laser beams to form a mixing light beam;

an image generating module, disposed in the light path of the mixing light beam for receiving the mixing light beam to generate a first image;

a lens, disposed in the transmitting path of the first image for providing an imaging position, wherein the first image is capable of passing through the lens to form a second image at the imaging position;

a diffusion module, comprising a diffuser and an actuator, wherein the diffuser is disposed at the imaging position of the lens, and the actuator is connected to the diffuser; and

a projection lens, disposed in the transmitting path of the second image for projecting the second image on a screen.

2. The laser projection system of claim 1, wherein the image generating module comprises a transparent liquid crystal panel.

3. The laser projection system of claim 2, further comprising an illuminating module disposed in the light path of the mixing light beam and between the light combining module and the transparent liquid crystal panel, wherein the illuminating module comprises a focus lens, an integration rod, and a plurality of relay lenses, and the focus lens is disposed between the light combining module and the integration rod, and the integration rod is disposed between the focus lens and the relay lenses.

4. The laser projection system of claim 1, wherein the lens is a relay lens.

5. The laser projection system of claim 1, wherein the image generating module comprises a reflective liquid crystal panel and a polarization beam splitter.

6. The laser projection system of claim 5, further comprising an illuminating module disposed in the light path of the mixing light beam and between the light combining module and the reflective liquid crystal panel, wherein the illuminating module comprises a fly eye lens and a plurality of relay lenses, and the fly eye lens is disposed between the light combining module and the relay lenses.

7. The laser projection system of claim 1, wherein the image generating module comprises a plurality of one-dimensional scanning lenses.

8. The laser projection system of claim 7, wherein the lens is an f-theta lens.

9. The laser projection system of claim 1, wherein the actuator of the diffusion module comprises a motor for rotating the diffuser, and the diffuser is a disc.

10. The laser projection system of claim 1, wherein the actuator of the diffusion module is capable of driving the diffuser moving back and forth in two different directions in a preset frequency selectively.

11. The laser projection system of claim 1, wherein the laser light sources comprises a red laser light source, a blue laser light source, and a green laser light source, and the light combing module comprises two parallel dichroic mirrors.