Implementation and assessment of a tilt-angle-measurement system for liquid-crystal cells

1992 ◽  
Author(s):  
Shu-Hsia Chen ◽  
Chen-Lung Kuo ◽  
Jong G. Wei ◽  
Chia-Wei Hao
Keyword(s):  
Liquid Crystal ◽  
Measurement System ◽  
Tilt Angle ◽  
Angle Measurement ◽  
Crystal Cells

Determination of surface tilt angle of splay and bend liquid crystal cells

2008 ◽  
Vol 48 (1) ◽  
pp. 43 ◽  
Author(s):  
Jy-Shan Hsu ◽  
Chun-Hao Yeh
Keyword(s):  
Liquid Crystal ◽  
Tilt Angle ◽  
Crystal Cells

Small twist angle measurement in homogeneously aligned liquid crystal cells

2009 ◽  
Vol 94 (9) ◽  
pp. 093507 ◽  
Author(s):  
Chang-Hun Lee ◽  
S. J. Elston ◽  
E. P. Raynes
Keyword(s):  
Liquid Crystal ◽  
Twist Angle ◽  
Angle Measurement ◽  
Crystal Cells

Note: Differential amplified high-resolution tilt angle measurement system

2014 ◽  
Vol 85 (9) ◽  
pp. 096104 ◽  
Author(s):  
Shijie Zhao ◽  
Yan Li ◽  
Enyao Zhang ◽  
Pei Huang ◽  
Haoyun Wei
Keyword(s):  
High Resolution ◽  
Measurement System ◽  
Tilt Angle ◽  
Angle Measurement

Design of Tilt Angle Measurement System

2013 ◽  
Vol 710 ◽  
pp. 534-537 ◽  
Author(s):  
Hua Huang
Keyword(s):  
Measurement System ◽  
Tilt Angle ◽  
Maximum Error ◽  
Angle Measurement ◽  
Heat Convection ◽  
Measuring System ◽  
Nonlinear Relationship ◽  
Single Chip ◽  
Repeatability Error ◽  
Conditioning Circuit

For the purpose of inclination measurement and monitoring, a tilt angle measurement system using a heat convection accelerometer is presented in this study. A conditioning circuit that center around the single chip processor is designed and built. Experiments were carried out to characterize the measuring system with the range of-90° to +90°. The output results show nonlinear relationship. The calibration result indicates that the sensitivity of the accelerometer is about 650mV/g. The maximum error is 5.5% while the repeatability error is 3%. Experiments proved that the developed measurement system is capable of measuring tilt angle.

Modifying electrooptics of orthoconic antiferroelectric liquid crystal cells by manufacturing procedures

2007 ◽  
Vol 15 (1) ◽  
Author(s):  
A. Spadło ◽  
N. Bennis ◽  
R. Dąbrowski ◽  
X. Quintana ◽  
J. Otón ◽  
...  
Keyword(s):  
Liquid Crystal ◽  
Liquid Crystals ◽  
Tilt Angle ◽  
Antiferroelectric Liquid Crystals ◽  
Crystal Cells ◽  
Electrooptical Response ◽  
Cell Thickness

AbstractOrthoconic antiferroelectric liquid crystals (AFLCs) having 45° tilt angle have been proposed to overcome the problem of reduced contrast usually exhibited by regular antiferroelectric displays. However, the pitch of the helix induced by chirality is customarily short in existing orthoconic materials, making it difficult to achieve surface stabilized configurations when the material’s pitch is smaller than the cell thickness.In this work, the influence of different manufacturing procedures on the electrooptical behaviour of orthoconic AFLCs is studied. Using the same orthoconic AFLC mixture, aligning surfaces and manufacturing protocol, we have observed two dissimilar responses, true orthoconic behaviour, and orthoconic V-shape response. The electrooptical response depends ultimately on the rubbing strategy adopted in either case.

Analytic twist angle measurement in liquid crystal cells

2009 ◽  
Vol 95 (8) ◽  
pp. 083505
Author(s):  
Chang-Hun Lee ◽  
P. Salter ◽  
E. P. Raynes ◽  
S. J. Elston
Keyword(s):  
Liquid Crystal ◽  
Twist Angle ◽  
Angle Measurement ◽  
Crystal Cells
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