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Title:
HORIZONTAL DEFLECTION CIRCUIT FOR DISPLAY DEVICE
Document Type and Number:
Japanese Patent JPS6339279
Kind Code:
A
Abstract:
PURPOSE:To stabilize horizontal deflection actions by providing a pulse phase adjustment circuit adjusting the phase of a horizontal output pulse and a pulse width adjustment circuit adjusting the width of the horizontal output pulse between a horizontal output circuit and a comparison signal generation circuit and adjusting the phase so as to delay the horizontal output pulse by an optional period. CONSTITUTION:A horizontal drive horizontal output circuit 7 generates the horizontal output pulse (d), which is delayed only by an adjustment phase tau1 by a horizontal pulse phase adjustment circuit 8 and the width of the pulse (f) obtained from it is adjusted into tau2 of width by the pulse width adjustment circuit 9. Thus, a comparison signal generation circuit 3 outputs a comparison signal. The output comparison signal (g) and a horizontal synchronizing signal (b) are phase detected in a phase detection circuit 4. And if the horizontal blanking period of a video signal (a) is made to alter from tauB to tauB1, the delay period by the horizontal pulse phase adjustment circuit 8 is adjusted from tau1 to tau11. Thus, a horizontal pull in range is kept constant regardless of the lengths tauB and tauB1 of the horizontal blanking period.

Inventors:
SUZUKI YOSHITERU
Application Number:
JP18381886A
Publication Date:
February 19, 1988
Filing Date:
August 04, 1986
Export Citation:
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Assignee:
MITSUBISHI ELECTRIC CORP
International Classes:
H04N5/12; (IPC1-7): H04N5/12
Domestic Patent References:
JPS5435616A1979-03-15



 
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