Fluorescent backlighting device for an instrument panel

Details Fluorescent backlighting device for an instrument panel Fluorescent backlighting device for an instrument panel

1994-11-07

1997-03-25

Lazarus, Ira S.

Illumination

Illuminated scale or dial

Edge illuminated modifier or light rod/pipe

362 31, 362 32, 362260, 362223, 362256, G01D 1128

Patent

active

056137508

ABSTRACT:
A backlighting device for a backlit graphic display used in an instrument panel of an automobile. The backlighting system involves the use of a fluorescent light source and a lightpipe which is tailored for use with the fluorescent light source so as to promote uniform transmission of light to the display, and to achieve a suitable level of light intensity when backlit by a minimal number of light sources. The backlighting system further involves forming the lightpipe from a material which readily transmits light, and preferably is sensitive to ultraviolet radiation, so as to enhance the lighting capability of the light source while also producing an aesthetically pleasing appearance for the display.

REFERENCES:
patent: 3590774 (1971-07-01), Solow
patent: 4924612 (1990-05-01), Kopelman
patent: 5128846 (1992-07-01), Mills et al.
patent: 5190365 (1993-03-01), Cordy et al.
patent: 5268823 (1993-12-01), Yergenson

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