Electric lamp and discharge devices – Cathode ray tube – Shadow mask – support or shield
Patent
1986-05-21
1988-04-12
Moore, David K.
Electric lamp and discharge devices
Cathode ray tube
Shadow mask, support or shield
313407, H01J 2906, H01J 2907
Patent
active
047376813
ABSTRACT:
A front assembly for a color cathode ray tube includes a faceplate having a peripheral sealing area adapted to mate with a funnel, with a centrally disposed phosphor screen. The assembly according to the invention includes a separate shadow mask support structure composed of ceramic material secured to the faceplate inner surface on opposed sides of the screen and within the sealing area for receiving and supporting a foil shadow mask in tension a predetermined distance from the screen. Other configurative aspects include a separate continuous or discontinuous metal cap or strip secured to the support structure for receiving and securing a mask, and a mask support structure comprising four discrete rails composed of ceramic with weldable metal strip means for interconnecting the rails to form a generally rectangular unitary shadow mask support structure. The ceramic may also serve as a "buffer" for compensating for the difference in thermal coefficients of the glass of the faceplate and the metal of the cap or strip.
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N. F. Fyler, "The CBS-Colortron: A Color Picture Tube of Advanced Design" Jan., pp. 326-334.
Robinder et al., "A High-Brightness Shadow-Mask Color CRT for Cockpit Displays", Tektronix, Inc.
Dietch Leonard
Fendley James R.
Jarosz John
Strauss Paul
Horabik Michael
Moore David K.
Zenith Electronics Corporation
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