Image display apparatus with adaptive optics for adjusting an image size formed by a projecting light

• US 8,426,795 B2
• Filed: 12/08/2009
• Issued: 04/23/2013
• Est. Priority Date: 12/12/2008
• Status: Active Grant

• Current Assignee: Young Optics, Inc.
• Original Assignee: Young Optics, Inc.
• Inventors: Chung, Po-Jen, Chen, Tien-Pao, Chen, Huang-Ming, Cheng, Chu-Ming
• Primary Examiner(s): LE, QUE TAN
• Application Number:
  US12/654,008
• Publication Number:
  US 20100149498A1
• Time in Patent Office: 1,232 Days
• Field of Search: 250/208.1, 250/239, 250/216, 353/77, 353/76, 353/37, 353/119, 359453-460
• US Class Current: 250/208.1
• CPC Class Codes: G03B 21/28 Reflectors in projection beam in illumination beam G03B21/2066
• CPC Class Codes: G03B 21/62 Translucent screens

Abstract

An image display apparatus includes a screen, a reflection mirror, an adaptive optics, and a projection unit. The reflection mirror has a reflective surface facing a light incident surface of the screen, and is separated from the light incident surface by a space. The boundary of the space is defined by the edges of the reflective surface and the light incident surface. The adaptive optics is disposed on the boundary of the space. The projection unit is disposed outside the space. The adaptive optics has a light exit side facing the reflective surface of the reflection mirror, and a light incident side facing the projection unit. A projecting light is generated from the projection unit, passes through the adaptive optics for adjusting the image size formed by the projecting light, and then is projected to the reflective surface of the reflection mirror for being reflected to the light incident surface.

Claims

1. An image display apparatus, comprising:

a screen, having a light incident surface;

a reflection mirror, having a reflective surface facing the light incident surface of the screen and separated from the light incident surface of the screen by a space, and a boundary of the space defined by edges of the reflective surface and edges of the light incident surface;

an adaptive optics, disposed on the boundary of the space defined by the edges of the reflective surface and the light incident surface and having a light incident side and a light exit side facing the reflective surface of the reflection mirror, said adaptive optics for adjusting an image size formed by a projecting light; and

a projection unit, facing the light incident side of the adaptive optics and located outside the space,

wherein the projection unit is capable of generating the projecting light to pass through the adaptive optics for adjusting the image size formed by the projecting light, and the projecting light comprises a plurality of light beams, wherein the light beams do not intersect with each other when passing through the adaptive optics and the light beams also do not intersect with each other before entering into the adaptive optics, and the light beams are projected to the reflective surface of the reflection mirror for being reflected to the light incident surface of the screen and passing the screen.

2. The image display apparatus of claim 1, wherein the reflection mirror is a planar mirror.

3. The image display apparatus of claim 1, wherein the reflection mirror is a folding mirror.

4. The image display apparatus of claim 1, wherein the adaptive optics comprises two convex lenses.

5. The image display apparatus of claim 1, wherein the reflection mirror is a curve mirror.

6. The image display apparatus of claim 1, wherein a first included angle is formed between the reflective surface of the reflection mirror and a datum plane, and a second included angle is formed between the light incident surface of the screen and the datum plane, wherein the second included angle is twice as big as the first included angle.

7. The image display apparatus of claim 6, wherein the datum plane is a ground plane.

8. The image display apparatus of claim 1, wherein the screen, the reflection mirror, and the adaptive optics are formed integrally.

9. The image display apparatus of claim 1, wherein the screen is a Fresnel lens.

10. The image display apparatus of claim 1, wherein the projection unit, the reflection mirror, and the adaptive optics compose an optical system, and the range of an effective focal length of the optical system is between 2.54 millimeters and 127 millimeters.

11. An image display apparatus, comprising:

a screen, having a light incident surface;

a reflection mirror, having a reflective surface facing the light incident surface of the screen and separated from the light incident surface of the screen by a space, and a boundary of the space defined by edges of the reflective surface and edges of the light incident surface;

an adaptive optics, comprising a folding mirror and a curve mirror, and disposed on the boundary of the space defined by the edges of the reflective surface and the light incident surface, wherein the adaptive optics has a light incident side located on the folding mirror and a light exit side located on the curve mirror, and the light exit side facing the reflective surface of the reflection mirror, said adaptive optics for adjusting an image size formed by a projecting light; and

a projection unit, facing the light incident side of the adaptive optics and located outside the space,

wherein the projection unit is capable of generating the projecting light to pass through the adaptive optics for adjusting the image size formed by the projecting light, and the image having an adjusted size is projected to the reflective surface of the reflection mirror for being reflected to the light incident surface of the screen and passing the screen, and

wherein the projecting light comprises a plurality of light beams, the light beams do not intersect with each other when being reflected by the folding mirror, when passing between the folding mirror and the curve mirror, and when being reflected by the curve mirror.

12. The image display apparatus of claim 11, wherein the reflection mirror is a curve mirror.

13. The image display apparatus of claim 11, wherein a first included angle is formed between the reflective surface of the reflection mirror and a datum plane, and a second included angle is formed between the light incident surface of the screen and the datum plane, wherein the second included angle is at least twice as big as the first included angle.

14. The image display apparatus of claim 13, wherein the datum plane is a ground plane.

15. The image display apparatus of claim 11, wherein the screen, the reflection mirror, and the adaptive optics are formed integrally.

16. The image display apparatus of claim 11, wherein the screen comprises a Fresnel lens.

17. The image display apparatus of claim 11, wherein the projection unit, the reflection mirror, and the adaptive optics compose an optical system, and range of an effective focal length of the optical system is between 2.54 millimeters and 127 millimeters.

18. An image display apparatus, comprising:

a screen, having a light incident surface;

a reflection mirror, having a reflective surface facing the light incident surface of the screen and separated from the light incident surface of the screen by a space, and a boundary of the space defined by edges of the reflective surface and edges of the light incident surface;

an adaptive optics, comprising a light guiding element and a folding mirror, and disposed on the boundary of the space defined by the edges of the reflective surface and the light incident surface, wherein the adaptive optics has a light incident side located on the light guiding element and a light exit side located on the folding mirror, and the light exit side facing the reflective surface of the reflection mirror, said adaptive optics for adjusting an image size formed by a projecting light; and

a projection unit, facing the light incident side of the adaptive optics and located outside the space,

wherein the projection unit is capable of generating the projecting light to pass through the adaptive optics for adjusting the image size formed by the projecting light, and the image having an adjusted size is projected to the reflective surface of the reflection mirror for being reflected to the light incident surface of the screen and passing the screen, and

wherein the projecting light comprises a plurality of light beams, the light beams do not intersect with each other when passing through the light guiding element, when passing between the light guiding element and the folding mirror, and when being reflected by the folding mirror.

19. The image display apparatus of claim 18, wherein the light guiding element comprises a light incident surface facing the projection unit and a light exit surface being substantially orthogonal to the light incident surface of the light guiding element.

20. The image display apparatus of claim 18, wherein the reflection mirror is a folding mirror.

21. The image display apparatus of claim 18, wherein a first included angle is formed between the reflective surface of the reflection mirror and a datum plane, and a second included angle is formed between the light incident surface of the screen and the datum plane, wherein the second included angle is twice as big as the first included angle.

22. The image display apparatus of claim 21, wherein the datum plane is a ground plane.

23. The image display apparatus of claim 18, wherein the screen, the reflection mirror, and the adaptive optics are formed integrally.

24. The image display apparatus of claim 18, wherein the screen comprises a Fresnel lens.

25. The image display apparatus of claim 18, wherein the projection unit, the reflection mirror, and the adaptive optics compose an optical system, and range of an effective focal length of the optical system is between 2.54 millimeters and 127 millimeters.