Projection type display

• US 6,517,212 B2
• Filed: 12/08/2000
• Issued: 02/11/2003
• Est. Priority Date: 12/08/1999
• Status: Expired due to Fees

• Current Assignee: Sharp Kabushiki Kaisha (Hon Hai Precision Industry Co., Ltd.)
• Original Assignee: Sharp Kabushiki Kaisha (Hon Hai Precision Industry Co., Ltd.)
• Inventors: Satou, Yasuhito
• Primary Examiner(s): Adams, Russell
• Assistant Examiner(s): ESPLIN, DAVID B
• Application Number:
  US09/732,973
• Publication Number:
  US 20020071103A1
• Time in Patent Office: 795 Days
• Field of Search: 353/38, 353/51, 353/81, 353/98, 353/99
• US Class Current: 353/99
• CPC Class Codes: H04N 9/3105 for displaying all colours simultaneously, e.g. by using two or more electronic spatial light modulators simultaneous projection in colour photography G03B33/10; beam splitting or combining systems per se G02B27/10
• CPC Class Codes: H04N 9/3164 using multiple light sources

Abstract

In a projection type display, light rays emitted from two light sources pass through an integrator made up of fly-eye lenses or the like, and proceed through predetermined light paths including condenser lenses, and are focused on liquid crystal light valves of liquid crystal panels or the like, where the light rays are converted into video information. This projection type display includes: two light sources; two parabolic reflectors for condensing light rays from the light sources; and a multiple number of prisms for dividing the light rays condensed by the parabolic reflectors in the substantially same direction into multiple elongate rectangular sections.

Claims

1. A projection type display, wherein light rays emitted from light sources pass through an integrator including fly-eye lenses and proceed through predetermined light paths including condenser lenses and are focused on liquid crystal light valves of liquid crystal panels or the like, where the light rays are converted into video information, comprising:

a plurality of light sources;

a plurality of reflectors for condensing the light rays from the light sources; and

a multiple number of separation/reflection means for dividing the light rays condensed by the reflectors in the substantially same direction into multiple elongate rectangular sections, wherein each of the multiple number of separation/reflection means is comprised of a multiple number of prisms arranged in an array, and wherein the width of the reflection light rays divided by the multiple number of separation/reflection means is set equal to an integral multiple of a single cell width of the fly-eye lens.

2. The projection type display according to claim 1, wherein each array has two sides defining the right-angled portion formed with a reflective coating.

3. The projection type display according to claim 1, wherein the separation/reflection means is made up of a multiple number of prisms being arranged in an array, each having the two sides defining the right-angled portion formed with a reflective coating.

4. The projection type display according to claim 1, wherein the separation/reflection means is made up of a multiple number of glass substrates having reflective portions and transparent portions formed alternately thereon, the glass substrates being arranged in a zigzag manner.

5. The projection type display according to claim 1, wherein the separation/reflection means is made up of a multiple number of glass substrates having reflective portions and transparent portions formed alternately thereon, the glass substrates being arranged in a zigzag manner.

6. The projection type display according to claim 1, wherein the separation/reflection means is configured of prisms arranged in an array, the opposing side of the right-angled portion of each prism being used as the reflective surface.

7. The projection type display according to claim 1, wherein the separation/reflection means is configured of prisms arranged in an array, the opposing side of the right-angled portion of each prism being used as the reflective surface.

8. The projection type display according to any one of claims 1, 2, 3, 4, 5, 6, and 7, further comprising a control means for activating and deactivating the multiple number of light sources.

9. A projection type display, wherein light rays emitted from light sources pass through an integrator including fly-eye lenses and proceed through predetermined light paths including condenser lenses and are focused on liquid crystal light valves of liquid crystal panels or the like, where the light rays are converted into video information, comprising:

a plurality of light sources;

a plurality of reflectors for condensing the light rays from the light sources; and

a multiple number of separation/reflection means for dividing the light rays from two light sources that are arranged alternately, wherein the light rays are condensed by the reflectors in the substantially same direction into multiple elongate rectangular sections, and wherein the width of the reflection light rays divided by the multiple number of separation/reflection means is set equal to an integral multiple of a single cell width of the fly-eye lens.

10. A projection type display, wherein light rays emitted from light sources pass through an integrator including fly-eye lenses and proceed through predetermined light paths including condenser lenses and are focused on liquid crystal light valves of liquid crystal panels or the like, where the light rays are converted into video information, comprising:

a plurality of light sources;

a plurality of reflectors for condensing the light rays from the light sources; and

a multiple number of separation/reflection means for dividing the light rays condensed by the reflectors in the substantially same direction into multiple elongate rectangular sections, wherein each of the multiple number of separation/reflection means is comprised of a multiple number of prisms being arranged in an array, each array having two sides defining the right-angled portion formed with a reflective coating, and wherein the width of the reflection light rays divided by the multiple number of separation/reflection means is set equal to an integral multiple of a single cell width of the fly-eye lens.