Communications: electrical – Land vehicle alarms or indicators – Internal alarm or indicator responsive to a condition of the...
Patent
1982-11-03
1986-03-04
Curtis, Marshall M.
Communications: electrical
Land vehicle alarms or indicators
Internal alarm or indicator responsive to a condition of the...
340748, 340745, 358140, G09G 116
Patent
active
045742790
ABSTRACT:
A video display system having two different selectable screen formats for displaying images in a display field is disclosed. The system includes circuitry for switching from a first screen format defining a display field of a first number of horizontal scan lines to a second screen format having a second number of scan lines, where the height and width of the display field remains the same for both screen formats. The first and second screen formats are generated, respectively, from first and second horizontal scan frequencies, which frequencies differ significantly from format-to-format. The system further includes adjustment circuitry for adjusting the height of the display field to remain the same for each screen format.
REFERENCES:
patent: 3999168 (1976-12-01), Findley et al.
patent: 4107664 (1978-08-01), Marino
patent: 4283724 (1981-08-01), Edwards
patent: 4365270 (1982-12-01), Rutishauser
patent: 4400717 (1983-08-01), Southworth et al.
patent: 4455572 (1984-06-01), Malden
Hewlett-Packard Journal; Apr. 1978 (Re: Model HP-9845A Desktop Computer).
Compaq Computer Corporation
Curtis Marshall M.
White T. Gordon
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