Display with housing having cavity for secondary light source

Details Display with housing having cavity for secondary light source Display with housing having cavity for secondary light source

2008-05-20

2008-05-20

Alavi, Ali (Department: 2875)

Illumination

Illuminated scale or dial

C362S029000, C362S231000

Reexamination Certificate

active

07374304

ABSTRACT:
A display with a housing and an indicium that may be selectively back-illuminated. The housing includes a cavity having a first portion and a second portion. A first light source that provides light of one color and a first intensity is disposed in the first portion. A second light source that provides light of another color and a second, higher intensity is disposed in the second portion. The second portion is disposed in-line and encompasses an area that includes the indicium. Operation of only the first light source back-illuminates the indicium with a first color. Operation of the second light source back-illuminates the indicium with a second color regardless of whether the first light source is illuminated or not. A member may be disposed between the first and second portions to aid in controlling the brightness and uniformity with which the indicium is illuminated by the first light source.

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