Television picture tube with aperture mask having recesses therein
US4518892A · kind A · utility
3Cited by
7References
5Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Sep 13, 1982 |
| Grant date | May 21, 1985 |
| Priority date | — |
| Expiry date | Sep 13, 2002 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J29/076
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A television tube having an electron gun and an aperture mask with a plurality of line of sight openings in the aperture mask wherein the line of sight openings in the aperture mask are partially defined by material on the cone side surface of the aperture mask and partially defined by material on the grade side surface of the aperture mask with the aperture opening size and shape varying in accordance with the position of the opening in the aperture mask. Two techniques known as the capital I and capital H resist layout techniques are taught to illustrate the formation of the aperture mask.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.