Method and apparatus for testing line screen CRT registration
US4439735A · kind A · utility
20Cited by
2References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 17, 1981 |
| Grant date | Mar 27, 1984 |
| Priority date | — |
| Expiry date | Jul 17, 2001 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R31/257
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method and apparatus are described for testing a line screen CRT for misregistration between its electron beam and the beam's phosphor stripe targets. The test method includes sensing light output at a plurality of test areas on the CRT screen as the electron beam is stepped across its phosphor targets. The maximum and minimum light outputs of each test area, and the beam locations at which the maximum and minimum light outputs were obtained, are used to compute the degree of misregistration for each test area.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.