| 摘要 |
PURPOSE:To obtain a reflecting plate base for surface light source that can obtain a bright. screen at high reflectance. CONSTITUTION:Expressions G1<=50%, G2/G1>=0.05, G3/G1>=0.05 are satisfied where G1 is glossiness of incident angle 60 deg.-light receiving angle 60 deg., G2 is glossiness of incident angle 60 deg.-light. receiving angle 45 deg., and G3 is glossiness of incident angle 60 deg.-light receiving angle 75 deg., and average reflectance in the wavelength region of the light of 400nm-700nm is not less than 90%. Since the glossiness is low, while scattering reflecting component is strong and the reflectance of the whole light is increased, a bright and clear screen of brightness higher than ever is obtained, when used as a reflecting plate 11 of a side-light type surface emitter. |
