Patent ID: 9348077
Filing Date: 2016-05-24
CPC Classification: G02B

Claim Text:
1. A method of manufacturing a patterned retarder, comprising: forming a single retarder material layer by applying a retarder material to a substrate; drying the single retarder material layer at a first temperature; exposing the single retarder material layer to linearly-polarized UV, wherein the single retarder material layer has an optical anisotropic property; heat treating the single retarder material layer at a second temperature higher than the first temperature to increase the optical anisotropic property of the single retarder material layer, and dividing the patterned retarder into unit patterned retarders by cutting the patterned retarder using a laser beam, wherein exposing the single retarder material layer to the linearly-polarized UV includes irradiating first polarized UV to the single retarder material layer and irradiating second polarized UV to the single retarder material layer, wherein the first polarized UV is irradiated to all over the single retarder material layer, and the second polarized UV is irradiated to the single retarder material layer through a mask including light-transmitting portions and light-blocking portions, which alternate each other, wherein an energy of the second polarized UV is larger than an energy of the first polarized UV, wherein the retarder material includes a photosensitive group, which shows the optical anisotropic property when the linearly-polarized light is exposed thereto, and a liquid crystal polymer, a liquid crystal monomer, an oligomer or a mixture thereof having a mesogen group, which shows a liquid crystal property within a range of predetermined temperatures, wherein the linearly-polarized UV has an energy of 60 mJ/cm wherein heat treating the single retarder material layer is performed through a thermal radiation or thermal convection phenomenon using a far infrared heater or an oven and is carried out under the temperature of 80 degrees Celsius to 150 degrees Celsius for 30 seconds to 30 minutes, and wherein the single retarder material layer exposed to the linearly-polarized UV and heat treated has a retardation value between 112 nm and 128 nm.