Communications: electrical – Land vehicle alarms or indicators – Internal alarm or indicator responsive to a condition of the...
Patent
1985-01-30
1987-03-31
Curtis, Marshall M.
Communications: electrical
Land vehicle alarms or indicators
Internal alarm or indicator responsive to a condition of the...
340749, G09G 116
Patent
active
046546502
ABSTRACT:
A device and method for providing a smooth scroll of a display on a cathode ray tube display device having a display area, horizontal deflecting means receiving horizontal drive pulses for effecting horizontal scans, vertical deflecting means receiving vertical drive pulses for moving said video display vertically, and a video input for receiving a video input signal. The device includes a microprocessor having an input and an output. The microprocessor counts, and places on its output, digital signals corresponding to its count. A digital-to-analog converter converts the digital signals to an analog signal. A summing device is connected between the digital-to-analog converter output and the vertical deflecting means of the cathode ray tube display device for summing a vertical deflection pulse and the analog signal output of said digital-to-analog converter, thereby vertically displacing the video input signal of the cathode ray tube display device.
REFERENCES:
patent: 3611348 (1971-10-01), Rogers
patent: 4160981 (1979-07-01), Raney, Jr.
Curtis Marshall M.
Dugas Edward
Gonzalez Floyd A.
Hawk Jr. Wilbert
NCR Corporation
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