Combined traffic signal with stacked EL elements

Details Combined traffic signal with stacked EL elements Combined traffic signal with stacked EL elements

1987-10-06

1989-08-15

Orsino, Joseph A.

Communications: electrical

Traffic control indicator

313506, 313509, 313510, G08G 1095

Patent

active

048579203

ABSTRACT:
A highly reliable and economical traffic signal has only one light-emitting display section having two or more semiconductor thin-film EL plates of different colors such as green and red stacked one on top of the other. Green and red can be displayed by causing one of the EL plates to emit light and yellow can be displayed by causing both of them to emit light.

REFERENCES:
patent: 2867739 (1959-01-01), Michlin
patent: 3680237 (1972-08-01), Finnerty, Sr.
patent: 3870991 (1975-03-01), Hayes
patent: 4568928 (1986-02-01), Biferno
patent: 4666793 (1987-05-01), Hirate
patent: 4719385 (1988-01-01), Barrow et al.

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