High-luminance light box for displays

Details High-luminance light box for displays High-luminance light box for displays

2007-07-10

2007-07-10

Sember, Thomas M. (Department: 2885)

Illumination

Plural light sources

With modifier

C362S223000

Reexamination Certificate

active

10524835

ABSTRACT:
The invention relates to light boxes comprising fluorescent tubes, which are used to illuminate display screens with optical valves, in particular liquid-crystal matrix screens. More specifically, the invention is suitable for use in the field of head-up or medium-head collimated displays used on aircraft. The invention consists in improving the photometric properties of said light boxes using a novel fluorescent tube arrangement, whereby said tubes are distributed over several stacked layers. In this way, the number of fluorescent tubes present in the light box is increased and acceptable heating is maintained. The photometric performances of the light box are thus increased while the correct service life of the tubes is retained.

REFERENCES:
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patent: 5661608 (1997-08-01), Barbier
patent: 5791770 (1998-08-01), Hoyt et al.
patent: 5975722 (1999-11-01), Van Duijneveldt
patent: 6570710 (2003-05-01), Nilsen et al.
patent: 6791528 (2004-09-01), Adler
patent: 0 540 140 (1993-05-01), None
patent: 0 992 837 (2000-04-01), None
patent: 11039915 (1999-02-01), None

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