Image display apparatus

• US 20100149498A1
• Filed: 12/08/2009
• Published: 06/17/2010
• Est. Priority Date: 12/12/2008
• Status: Active Grant

• Current Assignee: Young Optics, Inc.
• Original Assignee: Young Optics Company Limited
• Inventors: Chen, Tien-Pao, Chen, Huang-Ming, Chung, Po-Jen, Cheng, Chu-Ming
• Granted Patent: US 8,426,795 B2
• Time in Patent Office: Days
• US Class Current: 353/99
• 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 the boundary of the space defined by the edges of the reflective surface and the edges of the light incident surface;

an adaptive optics, disposed on the boundary of the space and having a light incident side and a light exit side facing the reflective surface of the reflection mirror; and

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

wherein the projection unit is capable of generating a projecting light to pass the adaptive optics for adjusting the image size formed by the projecting light, and the projecting light 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.

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 3, wherein the adaptive optics comprises a light guiding element and a folding mirror, 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.

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

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

7. The image display apparatus of claim 6, wherein the adaptive optics comprises a folding mirror and a curve mirror.

8. 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.

9. The image display apparatus of claim 8, wherein the datum plane is a ground plane.

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

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

12. 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.