Computer monitor

Details Computer monitor Computer monitor

1988-02-22

1989-07-11

Blum, Theodore M.

Electric lamp and discharge devices: systems

Cathode ray tube circuits

Cathode-ray deflections circuits

340739, H01J 2952, G09G 110

Patent

active

048475394

ABSTRACT:
The computer monitor of the invention is divided into the Composite Signal Mode and the Transistor-Transistor Logic Signal Mode types depending on the computer circuit design. The compatible monitor is comprised of a composite monitor circuit adapted to the Composite Signal Mode and a transistor-transistor logic monitor circuit adapted to the Transistor-Transistor Logic Signal Mode. It includes circuits for correcting the electrical characteristics to operate on both the composite and transistor-transistor logic computer time charts. Those circuits include a horizontal shaft circuit which is connected to the horizontal oscillation/drive circuit, a vertical shift circuit is connected to the vertical oscillation/output circuit and a flyback transformer circuit. The invention also includes a circuit selecting switch integrated with a plurality of switches for freely selecting one of the computer output signals by manual switching in accordance with the mode of the computer output signal.

REFERENCES:
patent: 3751706 (1973-08-01), Owens, Jr. et al.
patent: 3916254 (1975-10-01), Worster et al.
patent: 4063133 (1977-12-01), Nero et al.
patent: 4459614 (1984-07-01), Holzgrafe
patent: 4491835 (1985-01-01), Aron

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