H - Electricity – 04 – N
Patent
H - Electricity
04
N
350/78
H04N 9/22 (2006.01)
Patent
CA 1114057
ABSTRACT OF THE DISCLOSURE A control system for a beam index cathode ray tube momentarily gates or turns off all beam current at the transition from one color modulating signal to another. The resulting dip in the electron beam density, as it scans across an index phosphor stripe located between adjacent color phosphor areas, produces a substantially corresponding dip in the index signal derived from excitation of the index phosphor stripe by the electron beam. The dip in the index signal is detectable as an indication of the phase of the index signal substantially independent of difference in the amplitude of the electron beam current.
318695
Hosono Takashi
Ohkoshi Akio
Toyama Akira
Toyama Takashi
Yukawa Takahiro
Gowling Lafleur Henderson Llp
Sony Corporation
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