Tension mask assembly for a color CRT

Details Tension mask assembly for a color CRT Tension mask assembly for a color CRT

1986-12-17

1988-08-23

Moore, David K.

Electric lamp and discharge devices

Cathode ray tube

Shadow mask, support or shield

313408, 313482, H01J 2907

Patent

active

047663421

ABSTRACT:
An improved front assembly for a color cathode ray tube having a tension foil shadow mask is disclosed. The faceplate of the tube has on its inner surface a centrally disposed phosphor screen surrounded by a peripheral sealing area adapted to mate with a funnel. A shadow mask support structure is provided for securing a shadow mask in tension on the structure and spacing the shadow mask from the screen. The support structure includes an undulated strip defining a bottom sinuous edge for securing the support structure to the faceplate and a top sinuous edge for securing the shadow mask to the support structure. A cap may be provided for securement to the top sinuous edge of the undulated strip to provide a land for securing the shadow mask to the support structure.

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Robinder et al., "A High-Brightness Shadow-Mask Color CRT for Cockpit Displays", Tektronix, Inc., Beaverton, OR, 1983 SID Digest.
Fyler et al., "The CBS-Colortron: A Color Picture Tube of Advanced Design" Proceedings of the IRE.

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