Picture display device comprising a field deflection circuit and a field blanking circuit
AssigneeU.S. Philips Corporation
InventorPeter A. Duijkers
Life of this patent
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Abstract
A picture display device is disclosed having a field deflection circuit and a field blanking circuit. A pulse generator is also included in said device and comprises a gate circuit with OR-function to which is supplied a signal originating from the deflection circuit as well as a signal originating from the field deflection coil. This gate circuit produces a signal which causes the electron beam(s) in the picture display tube to be blanked.
Claims5
A picture display device comprising a picture display tube, a field deflection circuit for generating a deflection current having a trace and a retrace through a field deflection coil for the vertical deflection of one of more electron beam(s) generated in the picture display tube, and a pulse generator for generating a signal for blanking the electron beam(s) at least in the field retrace period, wherein the pulse generator comprises a gate circuit, the operation of which exhibits an OR-function, having means for receiving two input signals, namely a first input signal derived from the field deflection circuit and a second input signal derived from the field deflection coil, the gate circuit producing the blanking signal for the electron beam(s).
Dependencies are inferred from the claim text.