Source of white surface light and display with fluid crystal

摘要

A white surface light source comprising a light diffuser plate and a light source provided on the back side of the light diffuser plate, wherein the light source comprises at lease one LED element which emits lights including a red color, and the light diffuser plate comprises a transparent material and light diffusing particles dispersed in the transparent material, and wherein an absolute value An of a refractive index difference between the transparent material and the light diffusing particles, and a 50% cumulative particle diameter D₅₀ (mum) of the light diffusing particles satisfy the relationship: 0.2550<0.61 or 0.7550.