JPS6444925A - Projection type color display device - Google Patents
Projection type color display deviceInfo
- Publication number
- JPS6444925A JPS6444925A JP20091487A JP20091487A JPS6444925A JP S6444925 A JPS6444925 A JP S6444925A JP 20091487 A JP20091487 A JP 20091487A JP 20091487 A JP20091487 A JP 20091487A JP S6444925 A JPS6444925 A JP S6444925A
- Authority
- JP
- Japan
- Prior art keywords
- lens
- light
- fresnel lens
- ready
- equal
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Landscapes
- Liquid Crystal (AREA)
- Overhead Projectors And Projection Screens (AREA)
Abstract
PURPOSE:To use a ready-made overhead projector by respectively arranging a concave Fresnel lens on the light source side of a laminating liquid crystal panel and a convex Fresnel lens on an optical system side. CONSTITUTION:After the light from the light source 2 is converged by the Fresnel lens 3 equal to the concave lens disposed in the ready-made OHP or a device having the same structure, the converged light is made incident on the laminating liquid crystal panels 4 and 14 as objects to be projected after adjusted to parallel light once by the Fresnel lens 5 equal to the concave lens. Then, image light passing through the laminating panels 4 and 14 is condensed by the Fresnel lens 6 equal to the convex lens and made incident on the optical system for enlarging and projecting, for example, an image-formation lens. The light can be made perpendicularly incident on the panel and failures such as the deviation of picture element, etc., can be evaded. Thus, the ready-made OHP can be used.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62200914A JP2588541B2 (en) | 1987-08-13 | 1987-08-13 | Projection color display device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62200914A JP2588541B2 (en) | 1987-08-13 | 1987-08-13 | Projection color display device |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS6444925A true JPS6444925A (en) | 1989-02-17 |
JP2588541B2 JP2588541B2 (en) | 1997-03-05 |
Family
ID=16432374
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP62200914A Expired - Fee Related JP2588541B2 (en) | 1987-08-13 | 1987-08-13 | Projection color display device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP2588541B2 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0259788A (en) * | 1988-08-25 | 1990-02-28 | Fujitsu Ltd | Liquid crystal display device for enlarged projection |
JPH03146941A (en) * | 1989-11-02 | 1991-06-21 | Toshiba Corp | Liquid crystal projection type display device |
JPH05257114A (en) * | 1992-03-13 | 1993-10-08 | Hitachi Ltd | Liquid crystal projection type display |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6313019A (en) * | 1986-07-04 | 1988-01-20 | Hitachi Ltd | Liquid crystal display device |
-
1987
- 1987-08-13 JP JP62200914A patent/JP2588541B2/en not_active Expired - Fee Related
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6313019A (en) * | 1986-07-04 | 1988-01-20 | Hitachi Ltd | Liquid crystal display device |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0259788A (en) * | 1988-08-25 | 1990-02-28 | Fujitsu Ltd | Liquid crystal display device for enlarged projection |
JPH03146941A (en) * | 1989-11-02 | 1991-06-21 | Toshiba Corp | Liquid crystal projection type display device |
JPH05257114A (en) * | 1992-03-13 | 1993-10-08 | Hitachi Ltd | Liquid crystal projection type display |
Also Published As
Publication number | Publication date |
---|---|
JP2588541B2 (en) | 1997-03-05 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
LAPS | Cancellation because of no payment of annual fees |