Fabrication method of a compensation film comprising rubbing and using a beam
View Patent ↗A method of fabricating an LCD is provided. According to the method, an alignment film is printed and hardened on a first substrate and a second substrate. Subsequently, the alignment film is subject to a primary alignment process and a subsequent secondary alignment process. The primary alignment process includes a rubbing process and the secondary alignment process includes irradiating light on the entire surface of the rubbed alignment film. Finally, retarder LC materials are coated and hardened on the light-irradiated alignment film to form a first compensation film and a second compensation film.
1. A method of fabricating a compensation film, comprising:
printing an alignment film on a substrate;
evaporating a solvent of the alignment film at the temperature range of 60-80° C. and aligning a LC molecule of the alignment film;
hardening the alignment film at the temperature range of 80-200° C.;
applying a first alignment process including a rubbing process to the alignment film;
applying a second alignment process including a first irradiation process using a beam without any mask to an entire surface of the alignment film applied with the first alignment process to secure an alignment uniformity of a coatable retarder liquid crystal (“LC”) material;
coating a the coatable retarder liquid crystal (“LC”) material on the alignment film applied with the second alignment process; and
hardening the retarder LC material by performing a second irradiation process using non-polarized ultraviolet light,
wherein the beam is directly applied to the alignment film to align the alignment film,
wherein the first irradiation process shortly after the rubbing process is performed, and
wherein the beam is irradiated in the same direction as a rubbing direction of the rubbing process,
wherein the rubbing process is performed by rubbing the alignment film with a rubbing cloth,
wherein the rubbing cloth is one of velvet, rayon, nylon,
wherein the beam is one of ion beam, plasma-beam, and electron-beam irradiated on an entire surface of the rubbed alignment film.
2. The method according to claim 1 , wherein applying the first alignment process comprises rubbing the alignment film.
3. The method according to claim 1 , wherein the beam is irradiated with an angle to the substrates.
4. The method according to claim 1 , wherein the one of ion beam, plasma-beam, and electron-beam is irradiated in the same direction as the direction of the rubbing process.
5. The method according to claim 1 , further comprising applying one of a linear polarization and a partial polarization to the light.