Vehicular lighting device

Details Vehicular lighting device Vehicular lighting device

1990-12-17

1992-05-05

Dority, Carroll B.

Electric lamp and discharge devices

With optical device or special ray transmissive envelope

Polarizer or special ray transmission

313115, H01J 516

Patent

active

051111055

ABSTRACT:
An optical valve for use in a lamp of a motor vehicle comprises a main filament, and a sub-main filament. A multi-layer film is coated over a glass tube at the portion corresponding to the sub-main filament to produce yellow light. When driving at night and passing by a motor vehicle coming from the opposite direction, the sub-main filament is heated and produces yellow light which will not daze a driver's eyes, thus preventing dangerous situations to the drivers.

REFERENCES:
patent: 5017825 (1991-05-01), Heijnen et al.

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