High Contrast CRT.
Interim technical rept. 1 Jan-30 Apr 77,
WATKINS-JOHNSON CO SCOTTS VALLEY CA
Pagination or Media Count:
The objective of this program is the development of a three-inch, high contrast, two color CRT employing evaporated thin film phosphors. The initial green layers fabricated on CRT faceplates under this program exhibit luminous efficiencies approximately 25 of those previously achieved on layers fabricated on sapphire. This reduction results from the lower processing temperature required for use with the Type 1723 glass faceplates. Type 1720 glass originally envisioned for use in this effort and capable of higher temperature processing than 1723 glass was not available at the start of the program. Faceplates of 1723 glass and funnels of 7052 glass have been ordered to build and study fabrication problems. Data taken on the laminarflo gun in a three-inch monochrome CRT indicates that the gun can achieve current densities on the order of 12 Asq cm at a screen potential of 12 kV and therefore should easily satisfy the requirements for a current density of 1 to 2 Asq cm at 10 to 20 kV to achieve the required brightness. Author
- Electrooptical and Optoelectronic Devices