LIGHT DIFFUSIVE FILM AND VERTICAL TYPE SURFACE LIGHT SOURCE USING THE SAME

摘要

PROBLEM TO BE SOLVED: To obtain a light diffusive film which is thin and has luminance unevenness reduction effect needed for a right-under type surface light sources while maintaining high luminance.

SOLUTION: The light diffusive film is a film of 15 to 60% in total light beam transmissivity T(%) and ≥80% in total value of diffused light reflectivity R(%) and total light beam transmissivity T(%), and the right-under type surface light source is mounted with the light diffusive film on its projection surface.

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