Browsing by Author "Chung Te-Chen"

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A design of liquid crystal lens with low voltage driving
(2013-08-01)
Tang Xian-Zhu
;
Chung Te-Chen
;
Jen T'ing-Hsien
;
Lu Jian-Gang
;
Shieh Han-Ping
Design rules for liquid crystal (LC) lens with low driving voltage are studied in this paper. Many rules are obtained from simulations of five kinds of LC materials. If normalized Delta n(eff) of the LC material is less than 95%, the driving voltage of LC lens will be less than 10 V. On the premise that the performance of LC lens is satisfied and fabrication process is permitted, the smaller the normalized Aneff, the lower the driving voltage of the designed LC lensis. The results in can guide people in this paper designing and preparing the LC lens with high performance.
A design of liquid crystal lens with low voltage driving
(2013-08-01)
Tang Xian-Zhu
;
Chung Te-Chen
;
Jen T'ing-Hsien
;
Lu Jian-Gang
;
Shieh Han-Ping
Design rules for liquid crystal (LC) lens with low driving voltage are studied in this paper. Many rules are obtained from simulations of five kinds of LC materials. If normalized Delta n(eff) of the LC material is less than 95%, the driving voltage of LC lens will be less than 10 V. On the premise that the performance of LC lens is satisfied and fabrication process is permitted, the smaller the normalized Aneff, the lower the driving voltage of the designed LC lensis. The results in can guide people in this paper designing and preparing the LC lens with high performance.
A measurement method of cell gap for liquid crystal lens
(2013)
Tang Xian-Zhu
;
Chung Te-Chen
;
Jen Ting-Hsien
;
Lu Jian-Gang
;
Shieh Han-Ping
There was a problem in current cell gap measurement of liquid crystal (LC) lens. A method was proposed by adopting interference of linearly polarized light in this paper. It was claimed that the incident light was monochromatic light with a uniform distribution of light intensity. The polarization axis of the analyzer was perpendicular or parallel to the polarization axis of polarizer. The difference between light and dark interference fringes was the biggest when the angle was equal to 45 degrees between the rubbing direction of alignment layer in the LC lens and the polarization axis of polarizer. The cell gap of LC lens can be calculated by the transmittance of LC lens center and the max transmittance of its other locations. The tilt angle was equal to the pre-tilt angle of LC at the LC lens center. This method was simple and reliable. Its accuracy is relatively high due to the use of optical interference principle.