Patent ID: 9470393
Filing Date: 2016-10-18
CPC Classification: F21V,G02B

Claim Text:
1. An optical plate, comprising: a base substrate; a plurality of micro lens patterns formed on a first surface of the base substrate; and a low refraction layer disposed on a second surface of the base substrate, wherein the second surface of the base substrate is opposite to the first surface of the base substrate, wherein a refraction index of the low refraction layer is lower than that of the base substrate, wherein a fill factor of the micro lens pattern is in a range of 0.5 to 1.0 to reduce UGR, wherein the fill factor is an occupied area rate of the micro lens pattern per each unit area of the base substrate, and wherein sag (a ratio of a height H to a diameter of a lens R) of the micro lens patterns is in a range of 0.1 to 0.25.