Fluorescent lamp
OwnerMasanori Shimizu, Yoko Shimomura +1inventors
InventorsMASANORI SHIMIZU, YOKO SHIMOMURA, YOSHINORI TANABE
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Abstract
A two-wavelength band light emitting type fluorescent lamp the main light emission of which is obtained by fluorescent substances in which the ranges of the wavelength peak of light emission are located from 470 to 540 nm and from 600 to 650 nm. The fluorescent lamp has light colors located within a range where y is not larger than −0.43x+0.60 and x is not smaller than 0.16 on xy chromaticity coordinates and having Duv not lower than 5. The fluorescent lamp can perform a categorical identification of colors including at least red, green, blue, yellow and white for surface colors of an object to be illuminated.
Claims20
A two-wavelength band light emitting type fluorescent lamp a main light emission of which is obtained by fluorescent substances in which ranges of wavelength peak of light emission are located from 470 to 540 nm and from 600 to 650 nm,
- wherein the fluorescent lamp has light colors located within a range where y is not larger than −0.43x+0.60 and x is not smaller than 0.16 on xy chromaticity coordinates and having Duv not lower than 5, and
- a categorical identification of colors including at least red, green, blue, yellow and white can be carried out for a surface color of an object to be illuminated.
A two-wavelength band light emitting type fluorescent lamp a main light emission of which is obtained by fluorescent substances in which the ranges of a wavelength peak of light emission are located from 470 to 540 nm and from 600 to 650 nm,
- wherein the fluorescent lamp has light colors located within a range where y is not larger than −0.43x+0.60, y is not smaller than 0.64x+0.15 and x is not smaller than 0.16 on xy chromaticity coordinates and
- a categorical identification of colors including at least red, green, blue, yellow and white can be carried out for a surface color of an object to be illuminated.
Dependencies are inferred from the claim text.