GB507582A - Improvements in or relating to television receivers - Google Patents
Improvements in or relating to television receiversInfo
- Publication number
- GB507582A GB507582A GB34875/37A GB3487537A GB507582A GB 507582 A GB507582 A GB 507582A GB 34875/37 A GB34875/37 A GB 34875/37A GB 3487537 A GB3487537 A GB 3487537A GB 507582 A GB507582 A GB 507582A
- Authority
- GB
- United Kingdom
- Prior art keywords
- tube
- fluorescent screen
- screen
- angle
- light
- 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.)
- Expired
Links
- 230000003287 optical effect Effects 0.000 abstract 2
- 238000012986 modification Methods 0.000 abstract 1
- 230000004048 modification Effects 0.000 abstract 1
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N9/00—Details of colour television systems
- H04N9/12—Picture reproducers
- H04N9/31—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM]
- H04N9/3141—Constructional details thereof
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Transforming Electric Information Into Light Information (AREA)
- Cathode-Ray Tubes And Fluorescent Screens For Display (AREA)
Abstract
507,582. Television receivers. FERNSEH AKT.-GES. Dec. 16, 1937, No. 34875. Convention date, Dec. 16, 1936. [Classes 39 (i) and 40 (iii)] Distortion, due to the image of the fluorescent screen 2 of a cathode-ray tube 1 being projected on a viewing screen 5 at an angle alpha to the normal, is compensated by distorting the image produced on the screen of the tube, which is inclined at an angle # to the optical axis. The normal to the fluorescent screen is inclined to the direction of the undeflected electronic beam. The angle # is a fraction of the angle alpha equal to the inverse of the magnification of the optical system. The tube is so mounted as to be movable about a horizontal axis. Elliptical distortion of the spot of light is avoided by a compensating elliptical focusing field. The electronic beam is maintained in focus by variation of the focusing field. According to modifications, the fluorescent screen is deposited on a reflecting surface, and the light passes through an optically flat surface forming part of the envelope of the tube, Fig. 4 (not shown); the light from the fluorescent screen is reflected from a mirror in the tube, Fig. 5 (not shown) ; the fluorescent screen is on a carrier which is adjusted by an external control.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE507582X | 1936-12-16 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB507582A true GB507582A (en) | 1939-06-16 |
Family
ID=6546798
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB34875/37A Expired GB507582A (en) | 1936-12-16 | 1937-12-16 | Improvements in or relating to television receivers |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US2234227A (en) |
| AT (1) | AT157643B (en) |
| FR (1) | FR830888A (en) |
| GB (1) | GB507582A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2185360A (en) * | 1986-01-11 | 1987-07-15 | Pilkington Perkin Elmer Ltd | Display system |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2438022A (en) * | 1945-03-22 | 1948-03-16 | Rca Corp | Projection device for television apparatus |
| US2508764A (en) * | 1945-05-22 | 1950-05-23 | William C Miller | Optical projection system |
| US2489835A (en) * | 1945-11-14 | 1949-11-29 | Philco Corp | Optical projection system having apertured concave image forming mirror |
| US2466338A (en) * | 1946-02-21 | 1949-04-05 | Philco Corp | Skewed schmidt television projector with directive screen |
| DE914020C (en) * | 1947-05-24 | 1954-06-24 | Philips Nv | Arrangement for television receiver of the projection type |
| US3115544A (en) * | 1956-04-25 | 1963-12-24 | Hazeltine Research Inc | Color-television receivers and deflection yokes |
| US3023668A (en) * | 1957-02-21 | 1962-03-06 | Upjohn Co | Portable slide projector |
| US4880300A (en) * | 1988-05-06 | 1989-11-14 | Payner Leonard E | Vision saver for computer monitor |
| US5200859A (en) * | 1988-05-06 | 1993-04-06 | Ergonomic Eyecare Products, Inc. | Vision saver for computer monitor |
-
1937
- 1937-12-13 AT AT157643D patent/AT157643B/en active
- 1937-12-15 US US180018A patent/US2234227A/en not_active Expired - Lifetime
- 1937-12-16 GB GB34875/37A patent/GB507582A/en not_active Expired
- 1937-12-16 FR FR830888D patent/FR830888A/en not_active Expired
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2185360A (en) * | 1986-01-11 | 1987-07-15 | Pilkington Perkin Elmer Ltd | Display system |
| US4772942A (en) * | 1986-01-11 | 1988-09-20 | Pilkington P.E. Limited | Display system having wide field of view |
| GB2185360B (en) * | 1986-01-11 | 1989-10-25 | Pilkington Perkin Elmer Ltd | Display system |
Also Published As
| Publication number | Publication date |
|---|---|
| AT157643B (en) | 1939-12-27 |
| US2234227A (en) | 1941-03-11 |
| FR830888A (en) | 1938-08-11 |
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