Image display device and adjustment for alignment

• US 20060098294A1
• Filed: 09/27/2005
• Published: 05/11/2006
• Est. Priority Date: 05/10/2000
• Status: Active Grant

• Current Assignee: Hiroshi Suzuki, Jiro Suzuki, Kohei Teramoto, Shinsuke Shikama
• Original Assignee: Hiroshi Suzuki, Jiro Suzuki, Kohei Teramoto, Shinsuke Shikama
• Inventors: Suzuki, Hiroshi, Teramoto, Kohei, Suzuki, Jiro, Shikama, Shinsuke
• Granted Patent: US 7,230,774 B2
• Time in Patent Office: Days
• US Class Current: 359/631
• CPC Class Codes: G02B 13/16 for use in conjunction with image converters or intensifiers , or for use with projectors, e.g. objectives for projection TV
• CPC Class Codes: G02B 13/18 with lenses having one or more non-spherical faces, e.g. for reducing geometrical aberration G02B13/002 takes precedence
• CPC Class Codes: G02B 17/002 Arrays of reflective systems
• CPC Class Codes: G02B 17/08 Catadioptric systems used in non-imaging applications G02B19/00
• CPC Class Codes: G02B 17/0852 having a field corrector only
• CPC Class Codes: G02B 17/086 wherein the system is made of a single block of optical material, e.g. solid catadioptric systems
• CPC Class Codes: G02B 27/0025 for optical correction, e.g. distorsion, aberration
• CPC Class Codes: G02B 27/18 for optical projection, e.g. combination of mirror and condenser and objective photographic, cine and overhead projectors G03B21/00; photographic projection printing G03B27/32; photolithographic projectors G03F7/20; projection television H04N5/74; colour projection television H04N9/31
• CPC Class Codes: G02B 5/09 Multifaceted or polygonal mirrors , e.g. polygonal scanning mirrors; Fresnel mirrors
• CPC Class Codes: G02B 7/181 with means for compensating for changes in temperature or for controlling the temperature; thermal stabilisation
• CPC Class Codes: G02B 7/28 Systems for automatic generation of focusing signals
• CPC Class Codes: G03B 21/10 Projectors with built-in or built-on screen
• CPC Class Codes: G03B 21/16 Cooling; Preventing overheating
• CPC Class Codes: G03B 21/28 Reflectors in projection beam in illumination beam G03B21/2066
• CPC Class Codes: G03B 21/53 Means for automatic focusing, e.g. to compensate thermal effects
• CPC Class Codes: H04N 5/74 Projection arrangements for image reproduction, e.g. using eidophor
• CPC Class Codes: H04N 5/7458 the modulator being an array of deformable mirrors, e.g. digital micromirror device [DMD]
• CPC Class Codes: H04N 9/12 Picture reproducers H04N9/11 takes precedence
• CPC Class Codes: H04N 9/3141 Constructional details thereof details not peculiar to the presence of an electronic spatial light modulator G03B21/14
• CPC Class Codes: H04N 9/3147 Multi-projection systems displays in general H04N9/12; video walls G06F3/1446, G09G2300/026
• CPC Class Codes: H04N 9/317 : Convergence or focusing systems electronic adjustment of convergence H04N9/3185; convergence or focusing arrangements for cathode ray tubes H04N9/28; means for automatic focusing of projectors not peculiar to the presence of an electronic spatial light modulator G03B21/53
• CPC Class Codes: H04N 9/3194 : including sensor feedback

Abstract

An image display device comprises an optical imaging arrangement for providing image information to illumination light and for transmitting the light as an optical image signal; a display for receiving the optical image signal and for displaying an image based on the image information; and a projecting optical arrangement including a reflecting part having a reflecting surface for reflecting the optical image signal, and a refracting optical part having a refracting surface for projecting the optical image signal onto the reflecting part. At least one of the reflecting surface and the refracting surface is aspherical.

Claims

1. An image display device comprising:

a transmitting unit for providing image information to illumination light and for transmitting said light as an optical image signal;

a reflecting part for reflecting said optical image signal;

a refracting optical part for projecting said optical image signal onto said reflecting part; and

a display unit for receiving said optical image signal and for displaying an image based on said image information, wherein

said refracting optical part includes a path-bending unit for reflecting said optical image signal from a first lens unit to a second lens unit.

2. The image display device according to claim 1, wherein said path-bending unit bends said optical image signal in a horizontal plane.

3. The image display device according to claim 1, further comprising a plane mirror which reflects said optical image signal from said reflecting part to said display unit, and is disposed in parallel with a light receiving plane of said display unit.

4. An image display device comprising:

A transmitting unit for providing image information to illumination light and for transmitting said light as an optical image signal;

a reflecting part for reflecting said optical image signal;

a refracting optical part for projecting said optical image signal onto said reflecting part; and

a display unit for receiving said optical image signal and for displaying an image based on said image information, wherein said transmitting unit includes;

an illumination light source part for emitting illumination light;

a reflecting type image information providing part for receiving said illumination light emitted from said illumination light source part, for providing image information to said illumination light and for reflecting said illumination light as said optical image signal; and

a prism unit for transmitting incident light to said reflecting type image information providing part and outgoing light from said reflecting type image information providing part to said refracting optical part.

5. The image display device according to claim 4, wherein said prism unit is a total internal reflection prism.