Communications: electrical – Audible indication – Percussion-type sound producer
Patent
1977-09-12
1979-03-27
Trafton, David L.
Communications: electrical
Audible indication
Percussion-type sound producer
313510, G09F 932
Patent
active
041468830
ABSTRACT:
A display device having a plurality of information symbols for each light source such as an LED chip. The upper surface of each LED chip is divided into several light-emitting areas by a patterned array of electrically isolated, spaced electrodes. The LED chips are mounted to a substrate and can be selectively activated by a beam lead tape, which is also mounted to the substrate. A cover for the display forms thin, reflective light channels, each of which extends laterally from a light-emitting area to one or more optical openings in the cover. The optical openings form the information symbols. The lateral channels direct emissions from the LED chip to the openings via multiple reflection and optical dispersion to uniformly illuminate the openings.
REFERENCES:
patent: 3725910 (1973-04-01), McNaney
patent: 3858341 (1975-01-01), Wakabayashi
patent: 3876900 (1975-04-01), Amatsuka et al.
patent: 3911430 (1975-10-01), Jankowski et al.
patent: 3921026 (1975-11-01), Konishi et al.
patent: 4000437 (1976-12-01), Lederhandler et al.
patent: 4013916 (1977-03-01), Brown
Appeldorn Roger H.
Chern Mao J.
Alexander Cruzan
Beck Robert C.
Minnesota Mining and Manufacturing Company
Sell Donald M.
Trafton David L.
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