Rotatable raster scan display
US4267555A · kind A · utility
63Cited by
5References
3Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 29, 1979 |
| Grant date | May 12, 1981 |
| Priority date | — |
| Expiry date | Jun 29, 1999 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F2200/1611
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Apparatus for rotating a cathode ray tube (CRT) which is operated as a graphic display through 90 degrees such that different size pages of data may be displayed while minimizing the control circuitry required. The display deflection yoke is fixedly attached to a support frame for the display. The CRT is rotatably mounted within the yoke and held by annular thrust bearing which allows the CRT to be rotated 90 degrees. A switch is actuated by the rotation of the CRT to select between sets of control resistors to control the raster scan of the CRT in accordance with its orientation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.