Industrial Technology Research Institute

Au Optronics Corporation

Chunghwa Picture Tubes, Ltd.

Hannstar Display Corporation

Chi Mei Optoelectronics Corporation

Toppoly Optoelectronics Corporation

Quanta Display Inc.

Taiwan Tft Lcd Association

Yu-Ming Chen

Ching-Wen Hsiao

Bang-Hao Wu

Hsin-Chun Chiang

Chung-Wen Wu

A method to control the pretilt angle of a liquid crystal device is disclosed. The claimed invention provides two substrates and at least one vertical alignment layers, which are fabricated on one side of each substrate and are opposite to each other. Moreover, a liquid crystal layer is sandwiched between the alignment layers, and the preferred embodiment of the liquid crystal device has an Optically Compensated Birefrigence (OCB) configuration. More particularly, before the process of alignment for the liquid crystal device is performed, a pretilt angle disclosed in the present invention is adjusted since at least one vertical alignment layer is treated with a particle beam generated by plasma or ions. The pretilt angle can range between 5 and 85 degrees.

Method to control the pretilt angle of liquid crystal device

A method that uses at least one hydrogen ion beam for alignment of liquid crystal molecules is proposed in the present invention. The method of the present invention is proposed to resolve the problems of physical destruction and surface deterioration of the alignment films caused by the conventional method using argon ions beams. The method of the present invention directly uses at least one hydrogen ion beam to impact the alignment film. Hence, the physical destruction of the alignment film is reduced. In addition, via the reaction between hydrogen ions and the alignment films, the quality of the alignment film is improved.

Method for alignment of liquid crystal molecules by using hydrogen ion beam in an amount greater than one hundred times that of non-hydrogen ions

Growing community of inventors

Hsinchu, Taiwan

Yu-Ming Chen