Simple parameter determination for twisted nematic liquid-crystal display
Applied Optics, Vol. 46, Issue 17, pp. 3493-3497 (2007)
http://dx.doi.org/10.1364/AO.46.003493
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Abstract
A simple and accurate measurement method for determining the cell parameters of a twisted nematic liquid-crystal display (TN-LCD) is proposed. Based on the measurement of the maximum reflectance and the maximum transmittance of a TN-LCD by rotating the polarizer at a particular angle, between the front director of the liquid crystals and the transmission axis of the polarizer, the cell gap and the twist angle can be determined according to the Jones matrix theory, and the twist sense can also be determined easily by applying an external small voltage to slightly change the effective refractive index of the liquid crystal.
© 2007 Optical Society of America
OCIS Codes
(120.2040) Instrumentation, measurement, and metrology : Displays
(120.4630) Instrumentation, measurement, and metrology : Optical inspection
(230.3720) Optical devices : Liquid-crystal devices
ToC Category:
Instrumentation, Measurement, and Metrology
History
Original Manuscript: October 11, 2006
Revised Manuscript: February 25, 2007
Manuscript Accepted: March 12, 2007
Published: May 18, 2007
Citation
Wen-chi Hung, Ming-shan Tsai, Chien-ren Wang, I-min Jiang, and Wood-hi Cheng, "Simple parameter determination for twisted nematic liquid-crystal display," Appl. Opt. 46, 3493-3497 (2007)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-46-17-3493
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