Lighting module for instruments with a liquid-crystal matrix

Details Lighting module for instruments with a liquid-crystal matrix Lighting module for instruments with a liquid-crystal matrix

1994-09-16

1996-01-23

Lazarus, Ira S.

Illumination

Illuminated scale or dial

Internal light source

362260, 362247, 362346, 359 50, G02F 11335

Patent

active

054869838

ABSTRACT:
A lighting module for instruments with a liquid-crystal matrix (1) is disclosed. The module has a casing (5) including a back (8) and lateral walls (7), the said matrix closing off the casing on its face opposite the back, and at least one fluorescent tube (9). The fluorescent tube is disposed in the casing near the back. The back is reflective and shaped to form at least one parabolic cylindrical surface. The axis of the said fluorescent tube is substantially merged with the focal line of the said surface.

REFERENCES:
patent: 4425604 (1984-01-01), Imai et al.
patent: 5143433 (1992-09-01), Farrell
patent: 5253151 (1993-10-01), Mepham et al.
Patent Abstracts of Japan, vol. 12, No. 102, p. 684, Apr. 5, 1988 & JP-A-62 234 126 (NEC Home Electronics Ltd.) 14 Oct. 1987, abstract.

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