Dynamic focus control and power supply for cathode ray tube...

Details Dynamic focus control and power supply for cathode ray tube... Dynamic focus control and power supply for cathode ray tube...

H - Electricity

01

J

355/11

H01J 29/58 (2006.01) H01J 29/70 (2006.01) H04N 3/26 (2006.01)

Patent

CA 1152224

ABSTRACT OF THE DISCLOSURE Apparatus is provided for effecting automatic dynamic compensation of the focal characteristics of electron beam tubes having substantially flat viewing faces, compensation in terms of two dynamic inputs including low frequency components primarily representing display brightness and high frequency components primarily representing electron beam displacement.

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