Backlight luminaire

Details Backlight luminaire Backlight luminaire

1997-08-20

1999-11-02

Spyrou, Cassandra

Illumination

Light source and modifier

Including reflector

362346, 362347, 359851, F21V 700

Patent

active

059757221

ABSTRACT:
A backlight luminaire (50) is provided with at least two tubular fluorescent lamps (44, 45), with portions of the lamps (44, 45) exhibiting a variation in spectral characteristic in the longitudinal direction. The portions of the lamps are so positioned relative to each other that the spectral characteristic of a portion of a first lamp (44) and the spectral characteristic of a portion of a second lamp (45), which portions are arranged one beside the other, vary in opposite directions. The luminaire is further provided with a plurality of sub-reflectors (42, 43), the majority of the sub-reflectors (43) being provided with said portion of the first lamp (44) and said portion of the second lamp (45). Preferably, the majority of the lamps (44, 45) is distributed over more than one sub-reflector (43). Preferably, the lamps (44, 45) are U-shaped and alternately connected in series. The backlight luminaire (50) is employed in liquid-crystal display devices (51) in order to attain a light distribution having a uniform spectral characteristic.

REFERENCES:
patent: 5143433 (1992-09-01), Farrell
patent: 5555162 (1996-09-01), Shemitz

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