Display device

Details Display device Display device

1977-04-05

1979-04-10

Curtis, Marshall M.

Communications: electrical

Land vehicle alarms or indicators

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

324 96, 340803, G06F 314

Patent

active

041491505

ABSTRACT:
A display device for displaying input analog quantities by lighting luminescent display elements, comprising an arithmetic circuit for dividing each of the input analog quantities into plural ranges and for amplifying each of the divided input quantities up to a predetermined level, a circuit for dividing the predetermined level into plural levels, comparison circuits each provided for the respective divided levels and for determining the lighting of the display elements by comparing the divided levels with a reference signal, a circuit for generating a clock signal for determining the timing of the lighting of the display elements, and drive circuits each connected between the respective comparison circuits and the respective display elements thereby for delivering effective voltages for lighting the display elements in response to the output signals of the comparison circuits and the clock signal, whereby resolution is improved over the whole ranges of the input analog quantities.

REFERENCES:
patent: 3133278 (1964-05-01), Millis
patent: 3914758 (1975-10-01), Ingle
patent: 3987392 (1976-10-01), Kugelmann et al.
patent: 4006412 (1977-02-01), Campbell et al.
patent: 4028620 (1977-06-01), Kitagawa et al.
patent: 4040719 (1977-08-01), Schiebelhuth
patent: 4040721 (1977-08-01), Kurita

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