초록 ▼

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 chara

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.

대표청구항 ▼

[ I claim:] [1.] A backlight luminaire for a display device, said luminaire comprisingat least one first elongate fluorescent lamp having a first portion and a second portion and a spectral characteristic which varies in a longitudinal direction from said first portion to said second portion,at leas

[ I claim:] [1.] A backlight luminaire for a display device, said luminaire comprisingat least one first elongate fluorescent lamp having a first portion and a second portion and a spectral characteristic which varies in a longitudinal direction from said first portion to said second portion,at least one second fluorescent lamp having a first portion and a second portion and a spectral characteristic which varies in a longitudinal direction from said first portion to said second portion, said second elongate fluorescent lamp being substantially identical to said first elongate fluorescent lamp, each said first portion of each said second fluorescent lamp is side-by-side with one of said second portions of said at least one first fluorescent lamp, and each said second portion of each said second fluorescent lamp side-by-side with one of said first portions of said at least one first fluorescent lamp, anda reflector comprising a plurality of side-by-side concave sub-reflectors, said first and second lamps being arranged over said reflector, one of said first portions and one of said second portions being arranged side-by-side with respective said sub-reflectors.