Electric lamp and discharge devices: systems – Cathode ray tube circuits – Cathode-ray deflections circuits
Patent
1995-12-27
1998-06-23
Powell, Mark R.
Electric lamp and discharge devices: systems
Cathode ray tube circuits
Cathode-ray deflections circuits
H01J 2970
Patent
active
057709319
ABSTRACT:
A monitor generating a stable hold voltage includes a microprocessor for producing a mode line signal, a mode setting signal and an output voltage in accordance with an externally-supplied horizontal sync signal and vertical sync signal, a hold voltage generating section for generating a hold voltage by varying an output voltage of said microprocessor, and a horizontal deflection circuit for generating a horizontal drive signal of spherical wave having a frequency determined according to the hold voltage of the hold voltage generating section and generating a horizontal deflection signal of triangular waveform according to the horizontal drive signal to supply it to a cathode ray tube. Thus, the number of input port of the hold voltage generating section is reduced while preventing a malfunction thereof caused by unstable mode signals.
REFERENCES:
patent: 2468420 (1949-04-01), Wendt
patent: 2509761 (1950-05-01), Crooker
patent: 2832886 (1958-04-01), Morrill
patent: 3456075 (1969-07-01), Knight
patent: 3629720 (1971-12-01), Sedra
patent: 5023523 (1991-06-01), Tomita
patent: 5124792 (1992-06-01), Shimaoka
patent: 5138240 (1992-08-01), Shimura
Daewoo Electronics Co. Ltd.
Powell Mark R.
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