Patent
Method and apparatus for determining liquid crystal cell parameters from full Mueller matrix measurements
TLDR
In this paper, a model of the polarization properties of an LCD cell is developed based on estimations of what the physical parameters of the LCD cell (30) are believed to be.Abstract:
Method and apparatus for testing of LCD panels is disclosed. An LCD panel under lest (30) may be mounted to a translatable table (40) between polarization state generator (10) and polarization state analyzer (16). For each location on cell (30) to be tested, a variety of known polarization states (22) are launched through the LCD cell (30) and detected by the polarization state analyzer (16). Electrical signals representative of polarization states are acquired by a computer. Within the computer, a model of polarization properties of the LCD cell (30) is developed based on estimations of what the physical parameters of the LCD cell (30) are believed to be. RMS differences between simulated polarization properties and measured polarization properties are minimized by iteratively refining the modeled physical cell properties, at which point cell thickness and other physical parameters of the LCD cell may be deduced.read more
Citations
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References
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Journal ArticleDOI
Propagation of partially polarized light through anisotropic media with or without depolarization: A differential 4 × 4 matrix calculus
TL;DR: In this article, the Stokes vector S of a light beam that propagates through a linear depolarizing anisotropic medium obeys the first-order linear differential equation dS/dz = mS, where z is the distance traveled along the direction of propagation and m is a 4 × 4 real matrix that summarizes the optical properties of the medium which influence the stokes vector.
Journal ArticleDOI
Phase-only modulation of a twisted nematic liquid-crystal TV by use of the eigenpolarization states
TL;DR: The eigenpolarization states of a commercially available liquid-crystal television display are presented and it is shown that phase-only modulation can be achieved over a large dynamic range of video voltages for several bias voltage settings if the eigenmagnification states are used.
Proceedings ArticleDOI
Mueller matrix algorithms
TL;DR: In this paper, a method for the correction of systematic errors generated by large orientational and retardance errors in the polarization optics in the dual rotating retarder polarimeter is presented.
Patent
Reflection liquid crystal display and reflection liquid crystal display provided with built-in touch panel and comprising the same
TL;DR: In this article, a reflection color liquid crystal display with an easy-to-view multi-color image with a high contrast ratio is presented, which is not marred even when a pressure sensitive input unit is present.
Patent
System and method for improving data acquisition capability in spectroscopic rotatable element, rotating element, modulation element, and other ellipsometer and polarimeter and the like systems
TL;DR: In this article, a system and method for controlling polarization state determining parameters of a polarized beam of light in an ellipsometer or polarimeter and the like system, so that they are in ranges wherein the sensitivity, (of a sample system characterizing PSI and DELTA value monitoring detector used to measure changes in said polarization state resulting from interaction with a "composite sample system," comprised of a sample systems per se), is reduced.