Method for exposing a color tri-cathode ray tube panel to form three separate color phosphor stripe patterns by exposure from three separate light source positions using combination of corrective lenses
US4696879A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 10, 1984 |
| Grant date | Sep 29, 1987 |
| Priority date | — |
| Expiry date | Oct 10, 2004 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J9/2273
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A method for constructing a color cathode ray tube wherein a light source is placed at a number of positions and exposures are made and a film on the inside surface of the panel is exposed to form prescribed stripe width patterns using the transmission light intensity distribution which are superposed plural Fresnel diffraction waveforms and wherein correction lens system is selected which correspond to the exposure of various light source positions and have different values and the absolute value of the transmission light intensity distribution and the derivative .differential.I/.differential.x of the transmission light intensity distribution at positions corresponding to the edge of the stripe width pattern are optimized throughout the inside surface of the panel.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.