Title :
LCD pretilt angle measurement using QHQ compensation method
Author :
Li, Y.W. ; Kwok, H.S.
Author_Institution :
Dept. of Electron. & Electr. Eng., Hong Kong Univ. of Sci. & Technol., Kowloon, China
Abstract :
We would like to propose a new, simple method to evaluate the pretilt angle of a transmissive or reflective LCD cell. The compensator is consisted of two quarter-wave plates (QWP) and one half-wave plate (HWP). By proper adjusting the orientation of quarter wave plate and half wave plate, the phase value of the compensator which corresponding to the minimum transmission can be obtained. We can make use such value for calculating the actual pretilt angle.
Keywords :
light reflection; light transmission; liquid crystal displays; molecular orientation; optical retarders; LCD pretilt angle measurement; QHQ compensation method; half-wave plate; quarter-wave plates; reflective LCD cell; transmissive LCD cell; Delay lines; Goniometers; Laser theory; Liquid crystal displays; Manufacturing; Optical reflection; Optical retarders; Polarization; Solid modeling; Testing;
Conference_Titel :
Optoelectronics, Proceedings of the Sixth Chinese Symposium
Print_ISBN :
0-7803-7887-3
DOI :
10.1109/COS.2003.1278211
