04257084 is referenced by 143 patents and cites 9 patents.

A light-projection device for digital instrumentation consists of a one-piece body including reflective and diffusive surfaces and a chamber to locate a plurality of sources of varicolored light. Light from the sources is diffused to fill an entire line segment of the seven in a typical digit, with varicolored sources of light affording the potential for polychromatic display, thus enhancing the data with color to signify danger, normality, negative values, et cetera.

Title
Display device
Application Number
6/13745
Publication Number
4257084
Application Date
February 21, 1979
Publication Date
March 17, 1981
Inventor
Christopher H Reynolds
314 Grove St., Westwood, 02090
MA, US
Agent
Abbott Spear
IPC
F21V 7/04
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