Projection system of changing environment influence on display

• US 20070171379A1
• Filed: 01/26/2006
• Published: 07/26/2007
• Est. Priority Date: 01/26/2006
• Status: Abandoned Application

• Current Assignee: Chunghwa Picture Tubes Limited (Tatung Co., Ltd.)
• Original Assignee: Chunghwa Picture Tubes Limited (Tatung Co., Ltd.)
• Inventors: Mo, Chi-Neng, Wu, Shih-Min, Chen, Hun-Wei
• Application Number:
  US11/339,688
• Publication Number:
  US 20070171379A1
• Time in Patent Office: Days
• US Class Current: 353/37
• CPC Class Codes: G03B 21/28 Reflectors in projection beam in illumination beam G03B21/2066

Abstract

A system of changing environment influence on display is applied to a projection system. A reflection device is disposed between light management module and lenses module and configured for preventing environment light from the lenses module, so as to change the brightness of dark field and enhance contrast for display screen.

Claims

1. A projection system of changing environment influence on display, comprising:

a light management module;

a lenses module; and

reflecting means placed between said light management module and said lenses module, wherein said reflecting means is configured for preventing the environmental stray light coming from said lenses module from entering into said light management module.

2. The projection system of changing environment influence on display according to claim 1, wherein said reflecting means comprises a reflecting lens.

3. The projection system of changing environment influence on display according to claim 2, wherein the reflecting surface of said reflecting lens is faced onto but unparallel to the reflecting surface of said lenses module.

4. The projection system of changing environment influence on display according to claim 3, wherein said reflecting surface is a plane surface.

5. The projection system of changing environment influence on display according to claim 1, wherein said reflecting means comprises a reflecting concave lens.

6. The projection system of changing environment influence on display according to claim 1, wherein said reflecting means comprises a reflecting material attached on a surface of said lenses module, which said surface is faced onto said light management module.

7. The projection system of changing environment influence on display according to claim 1, wherein said reflecting means comprises a reflecting material attached on a surface of said light management module, which said surface is faced onto said lenses module.

8. A projection system of changing environment influence on display, comprising:

a light source;

a light management module;

a lenses module receiving a beam output through said light management module from said light source; and

reflecting means configured to place said light management module between said light source and said reflecting means, wherein said reflecting means is configured for reflecting light coming from said lenses module.

9. The projection system of changing environment influence on display according to claim 8, wherein said reflecting means comprises a reflecting concave lens.

10. The projection system of changing environment influence on display according to claim 8, wherein said reflecting means is a reflecting plane lens.

11. The projection system of changing environment influence on display according to claim 9, wherein said reflecting plane lens is tilted non-horizontally placed by an angle to said lenses module.

12. The projection system of changing environment influence on display according to claim 8, wherein said reflecting means comprises a reflecting material attached on an optical element of said light management module which is faced said lenses module.

13. The projection system of changing environment influence on display according to claim 8, wherein said reflecting means comprises a reflecting material attached on said lenses module and faced onto said lenses module.

14. The projection system of changing environment influence on display according to claim 8, wherein said light management module is composed of a plurality of optical components selected from the group consisting of polarization beam splitter, filter, polarizer, color plate, half wave plate, quarter wave plate.