Patent ID: 9557597
Date: 2017-01-31
CPC Classifications: G02B,G02F

Claim:
1. A liquid crystal display device comprising: a light source; a liquid crystal panel that modulates light emitted from the light source; and an optical control film that is arranged on a first side closer to a viewing person than the liquid crystal panel, and that utilizes total reflection, wherein the optical control film includes a transparent base material, a plurality of light blocking layers, and a light diffusing portion, the plurality of light blocking layers being provided in a random and non-cyclic arrangement on a first region of one surface of the transparent base material, the light diffusing portion being provided on a second region of the one surface, the first region being different from the second region, a film thickness of the light diffusing portion is larger than a thickness of the plurality of light blocking layers, the light diffusing portion includes a light output end surface on a second side closer to the transparent base material and a light input end surface on a third side opposite to the transparent base material, the light input end surface having a larger area than the light output end surface, the optical control film including a lower refractive-index material that has a lower refractive index than the light diffusing portion, and that is present in a cavity defined by the light diffusing portion, the optical control film anisotropically diffusing light, the lower refractive-index material being air or inert gas, the light diffusing portion includes an opening at the light input end surface, the opening being opposite to the plurality of light blocking layers, the opening having a smaller area than the plurality of light blocking layers, and shapes of the plurality of light blocking layers when viewed in plan from a direction normal to the one surface of the transparent base material include an isotropic shape and an anisotropic shape, the anisotropic shape having a long axis and a short axis.