PROJECTION SYSTEM

• US 20100002196A1
• Filed: 11/14/2008
• Published: 01/07/2010
• Est. Priority Date: 07/01/2008
• Status: Abandoned Application

• Current Assignee: Arima Photovoltaic & Optical Corp.
• Original Assignee: Arima Photovoltaic & Optical Corp.
• Inventors: Chen, Peng-Fan, Yeh, Shih-Po, Lu, Ho, Wu, Tsung-Hsien
• Application Number:
  US12/271,366
• Publication Number:
  US 20100002196A1
• Time in Patent Office: Days
• US Class Current: 353/31
• CPC Class Codes: G02B 27/1053 having a single light modulator for all colour channels
• CPC Class Codes: G02B 27/1086 operating by diffraction only
• CPC Class Codes: G02B 27/123 The splitting element being a lens or a system of lenses, including arrays and surfaces with refractive power
• CPC Class Codes: G02B 27/145 having sequential partially reflecting surfaces
• CPC Class Codes: G02B 27/149 using crossed beamsplitting surfaces, e.g. cross-dichroic cubes or X-cubes
• CPC Class Codes: G03B 21/005 Projectors using an electronic spatial light modulator but not peculiar thereto
• CPC Class Codes: G03B 21/14 Details
• CPC Class Codes: G03B 21/2033 LED or laser light sources
• CPC Class Codes: G03B 33/14 using lenticular screens integral with film G03C
• CPC Class Codes: H04N 9/3161 using laser light sources using laser beams scanning the display screen H04N9/3129

Abstract

A projection system includes a multi-laser beam generator, a beam switching device, a split beam projecting device and a transmissive light valve. The multi-laser beam generator selectively generates a red beam, a green beam and a blue beam. The beam switching device receives the red, green and blue beams, splits the red, green and blue beams into a plurality of light beams of different angles, and directs the red, green and blue beams of the different angles into a common optical path. The split beam projecting device includes a plurality of micro-lenses. The transmissive light valve has a plurality of pixels for receiving the red, green and blue beams that are guided by the split beam projecting device. The red, green and blue beams of the different angles are received by the micro-lenses and guided onto the pixels of the transmissive light valve for imagining on the pixels.

Claims

1. A projection system comprising:

a multi-laser beam generator for selectively generating a red beam, a green beam and a blue beam;

a beam switching device for receiving said red, green and blue beams that are emitted by the multi-laser beam generator, splitting said red, green and blue beams into a plurality of light beams of different angles, and directing said red, green and blue beams of said different angles into a common optical path;

a split beam projecting device comprising a plurality of micro-lenses, wherein each micro-lens receives said red, green and blue beams of said different angles that are issued by said beam switching device; and

a transmissive light valve having a plurality of pixels for receiving said red, green and blue beams that are guided by said split beam projecting device, wherein said red, green and blue beams of said different angles are received by said micro-lenses of said split beam projecting device and guided onto said pixels of said transmissive light valve for imagining on said pixels.

2. The projection system according to claim 1 wherein said projection system is a single-panel transmissive projection system.

3. The projection system according to claim 1 further comprising a controlling device electrically connected to said multi-laser beam generator, said beam switching device and said transmissive light valve for controlling operations of said multi-laser beam generator, said beam switching device and said transmissive light valve.

4. The projection system according to claim 1 wherein said beam switching device comprises:

a beam splitter part comprising a holographic diffraction element for receiving said red, green and blue beams that are emitted by the multi-laser beam generator, splitting said red, green and blue beams into said plurality of light beams of said different angles; and

a beam combiner part for combining said red, green and blue beams issued by said beam splitter part into said common optical path such that said red, green and blue beams of said different angles are directed to said split beam projecting device.

5. The projection system according to claim 4 wherein said beam switching device is a mechanical beam switching device or an electronic beam switching device.

6. The projection system according to claim 5 wherein said beam splitter part of said mechanical beam switching device is a vibration-type beam splitter part or a rotation-type beam splitter part.

7. The projection system according to claim 4 wherein said beam splitter part comprises a plurality of beam-splitting regions.

8. The projection system according to claim 4 wherein said beam combiner part comprises multiple prisms.

9. The projection system according to claim 4 wherein said beam combiner part comprises multiple color beam splitters or reflective mirrors.

10. The projection system according to claim 4 wherein said beam combiner part comprises multiple color beam splitters or reflective mirrors and at least one cube prism.

11. The projection system according to claim 1 wherein each micro-lens of said split beam projecting device is aligned with multiple pixels of said transmissive light valve.

12. The projection system according to claim 11 wherein each micro-lens of said split beam projecting device is aligned with two, three, four, sixth or nine pixels of said transmissive light valve.

13. The projection system according to claim 11 wherein said light beams of said different angles that are issued by said beam switching device comprise a first angle beam and a second angle beam.

14. The projection system according to claim 13 wherein said first angle beam is periodically switched between said red, green and blue beams, and said second angle beam is periodically switched between said red, green and blue beams.

15. The projection system according to claim 14 wherein said first angle beam and said second angle beam are received by said micro-lenses and directed onto different ones of said pixels.

16. The projection system according to claim 11 wherein said light beams of said different angles that are issued by said beam switching device comprise a first angle beam, a second angle beam and a third angle beam.

17. The projection system according to claim 16 wherein said first angle beam is periodically switched between said red, green and blue beams, said second angle beam is periodically switched between said red, green and blue beams, and said third angle beam is periodically switched between said red, green and blue beams.

18. The projection system according to claim 17 wherein said first angle beam, said second angle beam and said third angle beam are received by said micro-lenses and directed onto different ones of said pixels.