04271408 is referenced by 400 patents and cites 6 patents.

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.

Title
Colored-light emitting display
Application Number
6/84384
Publication Number
4271408
Application Date
October 12, 1979
Publication Date
June 2, 1981
Inventor
Yasunori Kishi
Tokyo
JP
Jun ichi Nishizawa
Sendai
JP
Toru Teshima
Yokohama
JP
Agent
Cushman Darby & Cushman
Assignee
Stanley Electric
JP
IPC
G08B 5/36
View Original Source