Colored-light emitting display

Details Colored-light emitting display Colored-light emitting display

1979-10-12

1981-06-02

Trafton, David L.

Communications: electrical

Land vehicle alarms or indicators

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

40564, 40581, 340366B, 340782, G08B 536

Patent

active

042714087

ABSTRACT:
A plurality of cellular concave mirror surfaces are formed on a plate-like reflector unit, and a plurality of light-emitting diodes are disposed on these cellular concave mirror surfaces to jointly form a colored light source. Connection wirings to be connected with a power supply source are provided on a substrate laminated with the reflector unit. A lamp base of a conventional type may be coupled to the substrate for being electrically connected to the wirings. This colored light source can provide a single or multiple color displays. Improved shadow pattern display can be provided by forming a complementary color pattern on a front cover lens. Letter, symbol or pattern display can be provided by selectively arranging light-emitting diodes on the reflector unit. In case the above-mentioned light source is used as a traffic signal device, power dissipation and maintenance care are reduced by the light-emitting diodes having low power consumption and long service life, and high security of the traffic is assured by the elimination of false indications caused by external lights.

REFERENCES:
patent: 1626286 (1927-04-01), Keenan
patent: 2038409 (1936-04-01), Bone
patent: 3161853 (1964-12-01), Hart
patent: 3163949 (1965-01-01), Gley
patent: 3845468 (1974-10-01), Smith
patent: 4056733 (1977-11-01), Prestridge

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