Arrangement for illuminating passive display

Details Arrangement for illuminating passive display Arrangement for illuminating passive display

1984-07-05

1987-07-07

Curtis, Marshall M.

Communications: electrical

Visual indication

Movable

34081512, G09G 300

Patent

active

046790446

ABSTRACT:
In a device for the illumination of a passive display element a flat light guide element made of plexiglass is arranged immediately behind the passive display element. The guide element has a peripheral edge which is sloped. A carrier plate is provided in the device, which has light-emitting diodes in chip form mounted thereon. The light-emitting diodes apply light onto the peripheral edge of the light guide element.

REFERENCES:
patent: 3553666 (1971-01-01), Melone
patent: 4045794 (1977-08-01), Ohta
patent: 4118110 (1978-10-01), Saurer et al.
patent: 4126383 (1978-11-01), Doriguzzi et al.
patent: 4196581 (1980-04-01), Nemoto
patent: 4365869 (1982-12-01), Hareng et al.

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