LIGHT-DIFFUSING LAMINATED FILM

摘要

The present invention provides a photodiffusion film laminate having specific photo properties and constitutions of high brightness or illumination while used in surface source device, and the non-uniformity of the brightness or illumination may reduce. The characteristic of the photodiffusion film laminate is to be formed by laminating an inner photodisffusion film (A) which is satisfied with the following (i) to (iii) and a substrate (C) which its total light transmittance of the light with wavelength 550nm is 50 to 100%, and there is no air layer between the interfaces of these two: (i) total light transmittance of the light with wavelength 550nm is 48 to 84%; (ii) for the light with wavelength 550nm of the main diffusion direction, the ratio of the transmittance for its emergence angle 30 DEG (I30) to the transmittance for its emergence angle 0 DEG (I0) is 8.0 to 95%; (iii) the circumflexion of the light with wavelength 550nm is 4.0 to 100%.