Alignment or correction of energy beam type displays

Details Alignment or correction of energy beam type displays Alignment or correction of energy beam type displays

1979-06-11

1981-09-22

Blum, Theodore M.

Electric lamp and discharge devices: systems

Cathode ray tube circuits

Cathode-ray deflections circuits

315 13C, H01J 2970, H01J 2976

Patent

active

042912563

ABSTRACT:
Multiple energy beams in a display, such as a color TV tube or computer terminal, can be accurately aligned or corrected using information acquired with a photodetector having a single sensitive spot which is precisely placed on the viewing surface of the display and the display unit, in turn, is equipped to be able independently to disable, to position, and to vary the intensity of each beam.

REFERENCES:
patent: 3723801 (1973-03-01), Oxenham
patent: 3743883 (1973-07-01), Burns
patent: 4001877 (1977-01-01), Simpson
patent: 4035834 (1977-07-01), Drury
patent: 4099092 (1978-07-01), Bristow
patent: 4159484 (1979-06-01), Strathman
patent: 4160935 (1979-07-01), Groot et al.

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