Color CRT front assembly with tension mask support

Details Color CRT front assembly with tension mask support Color CRT front assembly with tension mask support

1986-02-21

1987-08-11

DeMeo, Palmer C.

Electric lamp and discharge devices

Cathode ray tube

Shadow mask, support or shield

313408, 313479, 313472, 313284, H01J 2907, H01J 2988

Patent

active

046864164

ABSTRACT:
A front assembly for a color cathode tube is disclosed. The tube faceplate has on its inner surface a centrally disposed screen area for receiving process materials during the spin-application process. The front assembly has a shadow mask support structure secured to the inner surface of the faceplate on opposed sides of the screen area. The structure has a first surface for receiving and securing a foil shadow mask, and a second surface inclined from the first surface to the screen area effective to conduct from the screen area any excess of coating material applied during the spin-application process. As a result, discontinuities in phosphor application visible to the viewer, and non-adherence of phosphor resulting in wash-off and flake-off, are avoided. An embodiment is also shown in which electrical connection is made between a mask support structure and a screen.

REFERENCES:
patent: 3632339 (1972-01-01), Khan
patent: 3792300 (1974-02-01), Benda et al.
patent: 4072876 (1978-02-01), Morrell
patent: 4495437 (1985-01-01), Kume et al.
patent: 4547695 (1985-10-01), Rath
patent: 4595857 (1986-06-01), Rowe et al.
patent: 4605879 (1986-08-01), Rath

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