Cathode ray tube screen exposure system
US4256390A · kind A · utility
9Cited by
4References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 20, 1980 |
| Grant date | Mar 17, 1981 |
| Priority date | — |
| Expiry date | Mar 20, 2000 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J9/2274
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
The invention relates to an improvement in the photo-exposure system utilized in the forming of stripe-patterned screens on the viewing panels of color cathode ray tubes. The versatile system incorporates an adjustable electronically controlled cam arrangement for achieving desired oscillation of the exposure light source. A cam associated multi-apertured control disk initiates a pre-determined number of pulses which accurately control the degree of cam movement and resultant light source oscillation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.