Display control device

Details Display control device Display control device

1989-05-31

1991-06-11

Brier, Jeffery A.

Communications: electrical

Land vehicle alarms or indicators

Internal alarm or indicator responsive to a condition of the...

340703, 358 30, G09G 300

Patent

active

050236032

ABSTRACT:
A gradation level selecting circuit for selecting a gradation level consists of first and second selecting circuits (28, 29) and a selector (30). The first selecting circuit selects one of gradation level signals from a gradation level generator in accordance with monochrome data from a monochrome data generator (24) and predetermined one of color data from a color data generator (23). The second selecting circuit selects one of the gradation level signals in accordance with the color data. The selector (30) selects an output of the first selecting circuit (28) or an output of the second selecting circuit (29) in response to a content of a switching resistor (25), to supply it to a monochrome display device. Thus, appropriate gradation display can be carried out by the monochrome display device using software either for color display or for monochrome display.

REFERENCES:
patent: 4236175 (1980-11-01), Groothuis
patent: 4481529 (1984-11-01), Kerling
patent: 4549172 (1985-10-01), Welk
patent: 4626835 (1986-12-01), Nienaber et al.
patent: 4688031 (1987-08-01), Haggerty
patent: 4725833 (1988-02-01), Nakamura
patent: 4727414 (1988-02-01), Ranf et al.
patent: 4779083 (1988-10-01), Ishii et al.
patent: 4977398 (1990-12-01), Pleva et al.

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