Cathode ray tube display arrangements

Details Cathode ray tube display arrangements Cathode ray tube display arrangements

1987-02-18

1988-12-20

Blum, Theodore M.

Electric lamp and discharge devices: systems

Cathode ray tube circuits

Cathode-ray deflections circuits

315401, 358220, H01J 2952

Patent

active

047927330

ABSTRACT:
A cathode ray tube (CRT) display arrangement including protection means for protecting the screen of the CRT (1) against excessive heating, by the electron beam, e.g. due to failure of the beam deflection drive circuits (5), the protection means comprising an electronic storage means (27 to 41) having storage locations in which are stored values indicative of the temperature at different locations on the CRT screen, and means (7) for controlling the electron beam current in dependence on the contents of the storage means.

REFERENCES:
patent: 4338623 (1982-07-01), Asmus et al.

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