Method of fabricating hologram diffuser for liquid crystal display and liquid crystal display device using the same
View Patent ↗A hologram diffuser for a liquid crystal display wherein a resin layer with a desired thickness is formed on an upper substrate. A hologram pattern is formed in the resin layer using a hologram plate. A smoothing layer with a desired thickness is formed on the hologram layer provided with the hologram pattern. Accordingly, it is possible to assure a wide visual angle and realize a high picture quality.
1. A method for fabricating a hologram diffuser which comprises:
providing a substrate;
forming a resin layer on the substrate;
forming a hologram pattern in the resin layer to uniformly diffuse light in all orientations by pressing an original hologram pattern into the resin layer;
forming a smoothing film on the patterned resin layer, wherein the smoothing layer smoothes a surface of the hologram pattern and activates light beam diffusion at the hologram pattern; and
forming color filters or thin film transistors at an upper portion of the smoothing layer.
2. The method of claim 1 , wherein forming the hologram pattern includes:
locating an original hologram plate at an upper portion of the resin layer;
hardening the resin; and
removing the original hologram plate.
3. The method of claim 2 , wherein the resin layer is made from a thermal hardening resin, and further including the step of curing the resin layer by applying heat.
4. The method according to claim 2 , wherein the resin layer is made from an ultraviolet hardening resin, and further including the step of curing the resin layer by applying ultraviolet light.
5. The method of claim 1 , wherein the resin layer has a thickness of 0.5 to 10 μm.
6. The method of claim 1 , wherein the resin layer is formed using spin coating, knife coating or extrusion coating.
7. The method of claim 1 , wherein the smoothing layer has a thickness of 0.1 to 5 μm.
8. The method of claim 1 , wherein the smoothing layer has a refractive index difference of greater than 0.1 compared to the refractive index of the resin layer.