Dynamic focusing circuit for a monitor

Details Dynamic focusing circuit for a monitor Dynamic focusing circuit for a monitor

1997-11-14

1999-10-12

Westin, Edward P.

Electric lamp and discharge devices: systems

Cathode ray tube circuits

Cathode-ray deflections circuits

348806, H04N 326, H04N 928, G09G 100

Patent

active

059659904

ABSTRACT:
A dynamic focusing circuit for a monitor has a microcomputer which generates a mode control signal by determining a mode when inputting horizontal and vertical synchronization signals, and provides a dynamic focus signal to a focus grid of a cathode ray tube through a flyback transformer according to the mode control signal. A focus signal generation section generates horizontal and vertical dynamic focus signals according to the waveform control signal of the waveform control signal generation section and a waveform adjustment section adjusts a waveform of the dynamic focus signal of the focus signal generation section by inputting the mode control signal.

REFERENCES:
patent: 4560910 (1985-12-01), Midland
patent: 4707639 (1987-11-01), Truskalo
patent: 5235257 (1993-08-01), Kresock
patent: 5245254 (1993-09-01), Lee
patent: 5442263 (1995-08-01), Alig
JAPIO Abstract Accession No. 02850368 & JP 010147968 A (Mitsubishi) Sep. 6, 1989.

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