Operator control panel

Details Operator control panel Operator control panel

1987-06-18

1989-04-04

Brigance, Gerald L.

Communications: electrical

Land vehicle alarms or indicators

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

34081515, G09G 336

Patent

active

048189804

ABSTRACT:
In one embodiment, an operator control panel includes an enclosure in which a liquid crystal display and a pair of lamps are disposed. A first reflective surface is located inside the enclosure, and a second reflective surface is located outside the enclosure. The lamps are positioned so that light rays from their filaments are projected rearwardly onto the first reflective surface and then forwardly onto the back of the liquid crystal display while other light rays from the lamp filaments are projected forwardly onto the second reflective surface and then downwardly onto the front of the control panel. In another embodiment of the operator control panel, the lamps are disposed outside the enclosure and the second reflective surface is omitted.

REFERENCES:
patent: 4017155 (1977-04-01), Yagi et al.
patent: 4171874 (1979-10-01), Bigelow et al.
patent: 4367467 (1983-01-01), Emile, Jr.
patent: 4431966 (1984-02-01), Pucciarello
patent: 4453200 (1984-06-01), Trcka et al.
patent: 4618216 (1986-10-01), Suzawa
patent: 4642627 (1987-02-01), Hodsdon
patent: 4649381 (1987-03-01), Masuda et al.
patent: 4684939 (1987-08-01), Streit
patent: 4754275 (1988-06-01), Abbaticchio et al.

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