Patent ID: 10088609

Abstract:
There is provided a light diffuser which can alleviate glare of light emitted from a light source while preventing a decrease in brightness of the emitted light despite the presence of the light diffuser. The light diffuser, contains a thermoplastic resin and transparent particles added thereto. The light diffuser has a total light transmittance in a range of 50 to 85%, and a wavelength selectivity in a rectilinear light ratio in a range of 1.5 to 5.0, as obtained by following formulas (1)-(3): (wavelength selectivity in rectilinear light ratio)=(rectilinear light ratio of 550-nm light)/(rectilinear light ratio of 450-nm light)  (1)(rectilinear light ratio of 550-nm light)=(rectilinear light transmittance for 550-nm light)/(total transmittance for 550-nm light)  (2)(rectilinear light ratio of 450-nm light)=(rectilinear light transmittance for 450-nm light)/(total transmittance for 450-nm light)  (3).