Display device

Details Display device Display device

1996-04-29

1998-02-10

Issing, Gregory C.

Electric lamp and discharge devices: systems

Cathode ray tube circuits

Cathode-ray deflections circuits

315395, G09G 104, H01J 2974

Patent

active

057172960

ABSTRACT:
A horizontal saw tooth wave voltage VSAW is compared with an error output voltage VVP from the error amplifier circuit 115 in level by the comparator 16 and a comparison output voltage VCO of a square wave is obtained. The transistor 19 performs the switching operation at the comparison output voltage VCO, and a horizontal size control current IO flowing via the choke coil 21 is controlled by it, and a horizontal deflection current I.sub.DY in the horizontal deflection output circuit 65 is controlled. The comparison output voltage VCO is inverted and integrated by the inverter 24 and the integral circuit 23 in the feedback voltage generation circuit 80 and a feedback voltage VFB is generated. The feedback voltage VFB is supplied to the error amplifier circuit 115 together with a horizontal size reference voltage Vref for deciding the horizontal size of the screen and the level of the error output voltage VVP is controlled so that a relation that these levels are fixed is established.

REFERENCES:
patent: 5059874 (1991-10-01), Oliver
patent: 5220251 (1993-06-01), Gawell et al.

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