Drive method for synchronizing scanning and modulation of flat-c

Details Drive method for synchronizing scanning and modulation of flat-c Drive method for synchronizing scanning and modulation of flat-c

1988-04-25

1990-04-24

Brigance, Gerald

Facsimile and static presentation processing

Static presentation processing

Attribute control

358 69, 340703, G09G 100

Patent

active

049204106

ABSTRACT:
A drive method for a color CRT in which a point-sequential color video signal is produced to drive a modulation electrode of the CRT, in which an index signal is generated consisting of pulses at a frequency identical to a frequency of scanning successive screen phosphor color trios of the CRT, multi-phase index signals are derived from that index signal, and respective time differences between scanning timings of each color trio in each scan line and a specific index signal phase are successively measured, stored in memory, and subsequently read out to produce timing control signals for gating the color components of the point-sequential video signal. Requirements for timing accuracy and assembly precision of the CRT can thereby be substantially relaxed by comparison with a prior art single-phase index signal method.

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