SCHALTUNGSANORDNUNG ZUR ANSTEUERUNG EINER FLUESSIGKRISTALL-ANZEIGEVORRICHTUNG MIT RASTERFOERMIG ANGEORDNETEN BILDELEMENTEN

摘要

In a circuit arrangement for controlling a liquid crystal display device with pixels in a grid array, in which video signals (R, G, B) and horizontal and vertical frequency synchronous pulses (H, V) can be supplied to an integrated control circuit, there is a controllable oscillator with a phase comparator circuit and a frequency divider to derive a beat signal. In addition, to the control circuit may be supplied a time control signal (DTMG) which essentially assumes a first logic level during the active lines of the video signal and a second logic level during the horizontal and line frequency synchronous pulses and subsequent predetermined times.