Horizontal deflection circuit and cathode ray tube display appar

Details Horizontal deflection circuit and cathode ray tube display appar Horizontal deflection circuit and cathode ray tube display appar

1994-01-06

2000-02-15

Issing, Gregory C.

Electric lamp and discharge devices: systems

Cathode ray tube circuits

Cathode-ray deflections circuits

315408, G09G 104

Patent

active

06025680&

ABSTRACT:
A horizontal deflection circuit including a horizontal deflection output circuit and a horizontal sawtooth wave current generation circuit. The horizontal output deflection circuit has a horizontal deflection coil and an S-shape capacitor connected in series with the horizontal deflector coil for supplying a horizontal deflection current to the horizontal deflector coil and the S-shape capacitor in accordance with a horizontal drive pulse. The horizontal sawtooth wave current generation circuit supplies a horizontal sawtooth wave current to the S-shape capacitor in a direction opposite to the horizontal deflection current and has a power voltage thereof controlled so that a difference current between the horizontal deflection current and the horizontal sawtooth wave current flowing in the S-shape capacitor has an amplitude proportional to a horizontal deflection frequency raised to a power N, where N has a value greater than 1, thereby enabling continuous S-shape correction independent of changes in the horizontal deflection frequency. A display apparatus utilizing the horizontal deflection circuit provides for S-shape correction with a maximum linearity error at a constant value of less than 5%.

REFERENCES:
patent: 4540933 (1985-09-01), Teuling
patent: 4645985 (1987-02-01), Dietz
patent: 4733141 (1988-03-01), Watanuki
patent: 4871951 (1989-10-01), Teuling

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