JPS5550792A - Video projector - Google Patents
Video projectorInfo
- Publication number
- JPS5550792A JPS5550792A JP12262078A JP12262078A JPS5550792A JP S5550792 A JPS5550792 A JP S5550792A JP 12262078 A JP12262078 A JP 12262078A JP 12262078 A JP12262078 A JP 12262078A JP S5550792 A JPS5550792 A JP S5550792A
- Authority
- JP
- Japan
- Prior art keywords
- mirror
- cathode ray
- screen
- respect
- angle
- 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
- Video Image Reproduction Devices For Color Tv Systems (AREA)
- Projection Apparatus (AREA)
- Transforming Electric Information Into Light Information (AREA)
Abstract
PURPOSE: To obtain the stable optical focus by projecting the light scattered from the projecting tube at a fixed angle with respect to the screen from the mirror surface.
CONSTITUTION: Cathode ray tubes 11R, 11B, 11G have the center line C of the axial direction thereof disposed at an angle with respect to the horizontal line A. The mirror 13 has an upper end surface inclined at an angle of α in the opposite direction to the cathode ray tube with respect to the vertical line. The emitted light X from the cathode ray tubes 11R, 11B, 11G is refelected on the mirror 13 and projected on the screen 14. The audience 15 watches the screen 14 from the back ward of the mirror 15. In addition, the center line G from the virtual image S of the cathode ray tube due to the mirror 13 to the screen 14 has angle of elevation α+2β with respect to the horizontal line A. Accordingly, the adjustment of the focus can be carried out by approaching to or separating from the direction of the mirror 13 the cathode ray tubes 11R, 11B, 11G axially along the center line C.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP12262078A JPS5550792A (en) | 1978-10-06 | 1978-10-06 | Video projector |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP12262078A JPS5550792A (en) | 1978-10-06 | 1978-10-06 | Video projector |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5550792A true JPS5550792A (en) | 1980-04-12 |
Family
ID=14840459
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP12262078A Pending JPS5550792A (en) | 1978-10-06 | 1978-10-06 | Video projector |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5550792A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS58211937A (en) * | 1982-06-04 | 1983-12-09 | Nippon Tokushu Toryo Kk | Lightweight ceiling member for car |
JPS58221738A (en) * | 1982-06-17 | 1983-12-23 | Nippon Tokushu Toryo Kk | Soundproof ceiling material for vehicle |
WO2007141933A1 (en) * | 2006-06-08 | 2007-12-13 | Panasonic Electric Works Co., Ltd. | Image display device |
-
1978
- 1978-10-06 JP JP12262078A patent/JPS5550792A/en active Pending
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS58211937A (en) * | 1982-06-04 | 1983-12-09 | Nippon Tokushu Toryo Kk | Lightweight ceiling member for car |
JPS58221738A (en) * | 1982-06-17 | 1983-12-23 | Nippon Tokushu Toryo Kk | Soundproof ceiling material for vehicle |
WO2007141933A1 (en) * | 2006-06-08 | 2007-12-13 | Panasonic Electric Works Co., Ltd. | Image display device |
US7980702B2 (en) | 2006-06-08 | 2011-07-19 | Panasonic Electric Works Co., Ltd. | Image display device |
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