Claims
- 1. A liquid crystal display device using a hologram, characterized in that a liquid crystal display element is provided on a back surface side thereof opposite to a display surface side thereof with a diffuse reflection type hologram itself capable of diffusing and reflecting light of selected wavelengths incident from a specific direction only in a direction defined as a viewing region, wherein said hologram has a different optical function with respect to different respective wavelengths, wherein the diffuse reflection type hologram comprises a duplicate hologram of a single photosensitive layer.
- 2. A liquid crystal display device using a hologram, characterized in that a liquid crystal display element is provided on a back surface side thereof opposite to a display surface side thereof with a diffuse reflection type hologram itself capable of diffusing and reflecting light of selected wavelengths incident from a specific direction only in a direction defined as a viewing region, wherein said hologram has a different optical function with respect to different respective wavelengths, wherein the diffuse reflection type hologram comprises a plurality of layers including:a first hologram recorded on a first photosensitive material using a wavelength produced by a Kr laser; a second hologram recorded on a second photosensitive material using a wavelength produced by at least one of an Ar and a dye laser; a third hologram recorded on a third photosensitive material using a wavelength produced by an Ar laser.
- 3. The liquid crystal display device of claim 2, wherein a color tuning film is laminated on the hologram, wherein said color tuning film broadens a diffraction wavelength range of said hologram layer.
- 4. A liquid crystal display device using a hologram, characterized in that a liquid crystal display element is provided on a back surface side thereof opposite to a display surface side thereof with a diffuse reflection type hologram itself capable of diffusing and reflecting light of selected wavelengths incident from a specific direction only in a direction defined as a viewing region, wherein said hologram has a different optical function with respect to different respective wavelengths,characterized in that a diffuse reflection plate or a reflector plate is located on the back surface side of the diffuse reflection type hologram, wherein the diffuse reflection type hologram comprises a plurality of layers including: a first hologram recorded on a first photosensitive material using a wavelength produced by a Kr laser; a second hologram recorded on a second photosensitive material using a wavelength produced by at least one of an Ar and a dye laser; a third hologram recorded on a third photosensitive material using a wavelength produced by an Ar laser.
- 5. A liquid crystal display device using a hologram, characterized in that a liquid crystal display element is provided on a back surface side thereof opposite to a display surface side thereof with a diffuse reflection type hologram itself capable of diffusing and reflecting light of selected wavelengths incident from a specific direction only in a direction defined as a viewing region, wherein said hologram has a different optical function with respect to different respective wavelengths,characterized in that a diffuse reflection plate or a reflector plate is located on the back surface side of the diffuse reflection type hologram, characterized in that a polarizing plate, a hologram, a color tuning film and a reflecting layer are laminated together in order from a liquid crystal side.
- 6. A liquid crystal display device of claim 5, characterized in that said hologram is a color hologram with interference fringes recorded thereon in such a way as to diffract a plurality of wavelengths including red, green and blue wavelengths.
Priority Claims (5)
Number |
Date |
Country |
Kind |
7-312361 |
Nov 1995 |
JP |
|
7-312362 |
Nov 1995 |
JP |
|
7-322973 |
Dec 1995 |
JP |
|
8-008531 |
Jan 1996 |
JP |
|
8-008532 |
Jan 1996 |
JP |
|
Parent Case Info
This application is a DIV. of Ser. No. 08/758,093 filed Nov. 27, 1996 now U.S. Pat. No. 6,075,579.
US Referenced Citations (23)
Foreign Referenced Citations (7)
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1-152486 |
Jun 1989 |
JP |
7-92328 |
Apr 1995 |
JP |
8-240868 |
Aug 1996 |
JP |
8-334752 |
Dec 1996 |
JP |
9-138396 |
May 1997 |
JP |
09-211452 |
Aug 1997 |
JP |
9-281477 |
Oct 1997 |
JP |