Display device with dynamic focus circuit

Details Display device with dynamic focus circuit Display device with dynamic focus circuit

1997-10-06

1999-03-23

Westin, Edward P.

Electric lamp and discharge devices: systems

Cathode ray tube circuits

Cathode-ray deflections circuits

315382, 348806, H04N 326, H01J 2958

Patent

active

058864822

ABSTRACT:
A display device for suppressing focus dislocation due to high voltage fluctuation and realizing a dynamic focus circuit with large output at low power consumption and low cost, in which a circuit for detecting high voltage fluctuation is provided, and the dynamic focus waveform is clamped, and the waveform of horizontal cycle is clipped during the retrace time, and a boot strap circuit including an emitter follower, DC feedback circuit, and capacitor is provided as an output circuit.

REFERENCES:
patent: 4891564 (1990-01-01), Crowley
patent: 5036259 (1991-07-01), Sutton et al.
patent: 5146142 (1992-09-01), Van Tol
patent: 5430358 (1995-07-01), George
patent: 5434485 (1995-07-01), Kawashima et al.
patent: 5455492 (1995-10-01), Turnbull
patent: 5463288 (1995-10-01), George et al.
patent: 5705900 (1998-01-01), Hwang

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