Variable color digital multimeter

Details Variable color digital multimeter Variable color digital multimeter

1986-01-15

1988-12-27

Birmiel, Howard A.

Communications: electrical

Land vehicle alarms or indicators

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

340702, 340762, 324 99D, G01R 1302, G09G 316

Patent

active

047943831

ABSTRACT:
A multimeter with variable color digital display indicates measured values in digital format and in variable color. The multimeter includes a color control circuit for selectively controlling color of the digital display in accordance with the measurement quantity, method, unit, mode, function, range, location, modifier, control, limits, and the like. A color converter circuit is disclosed for converting analog voltage to variable color.

REFERENCES:
patent: 3740570 (1973-06-01), Kaelin
patent: 3840873 (1974-10-01), Usui
patent: 4086514 (1978-04-01), Havel
patent: 4228394 (1980-10-01), Cosby
patent: 4298837 (1981-11-01), Koslar
patent: 4303913 (1981-12-01), Tohda et al.
patent: 4360804 (1982-11-01), Ohura
patent: 4484187 (1984-11-01), Brown et al.
patent: 4630040 (1986-12-01), Haertling

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