JPS6448056A - Electronic ohp - Google Patents
Electronic ohpInfo
- Publication number
- JPS6448056A JPS6448056A JP20559287A JP20559287A JPS6448056A JP S6448056 A JPS6448056 A JP S6448056A JP 20559287 A JP20559287 A JP 20559287A JP 20559287 A JP20559287 A JP 20559287A JP S6448056 A JPS6448056 A JP S6448056A
- Authority
- JP
- Japan
- Prior art keywords
- information
- strong
- ohp
- light
- utmost
- 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.)
- Pending
Links
Landscapes
- Overhead Projectors And Projection Screens (AREA)
- Liquid Crystal (AREA)
Abstract
PURPOSE:To take out the light quantity of information to the utmost and to brighten a projected image by setting the angle between a direction where polarization characteristic including information of an overhead projector (OHP) is strong and an incident direction on a metallic surface to nearly 90 deg.. CONSTITUTION:Outgoing light 6 from a unit 2 using a TN type liquid crystal light valve 1 functioning as an OHP information source is near to linear polarization which has strong polarized wave characteristic 7 in a direction perpendicular to the surface of paper and it is made incident on a reflector 4 through a lens 3 to project the reflected light on a screen 5. By setting the angle between a direction where the polarization characteristic is strong and an incident direction on the metallic surface 4 to nearly 90 deg., the light quantity of the information can be taken out to the utmost and the projected image can be brightened.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP20559287A JPS6448056A (en) | 1987-08-19 | 1987-08-19 | Electronic ohp |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP20559287A JPS6448056A (en) | 1987-08-19 | 1987-08-19 | Electronic ohp |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS6448056A true JPS6448056A (en) | 1989-02-22 |
Family
ID=16509434
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP20559287A Pending JPS6448056A (en) | 1987-08-19 | 1987-08-19 | Electronic ohp |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6448056A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH07281299A (en) * | 1995-01-24 | 1995-10-27 | Casio Comput Co Ltd | Projection type liquid crystal display device |
-
1987
- 1987-08-19 JP JP20559287A patent/JPS6448056A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH07281299A (en) * | 1995-01-24 | 1995-10-27 | Casio Comput Co Ltd | Projection type liquid crystal display device |
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