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US 2017/0255040 A1Published application
Measurement techniques for liquid crystal parameters including twist elastic constant with light measurement
AssigneeInstec, Inc.
InventorsHENRY ZHONG ZOU, LIANHUA JI
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Abstract
Provided is a set of techniques for measuring different properties or parameters of liquid crystal mixtures by applying a driving waveform and measuring the response current and/or the optical response. This may be done by using specific liquid crystal test cells. Also provided are the optimized test cell parameters that are used in the algorithms for calculating the properties.
Claims18
1-4. (canceled)
A method for measuring the twist elastic constant (K22) of a liquid crystal mixture under test, the method comprising:
- providing a liquid crystal test cell having a pair of electrodes;
- providing a light source that directs light into one side of the test cell and a light sensor to measure light that exits the test cell;
- placing the liquid crystal mixture under test into the liquid crystal test cell;
- applying an electrical driving signal to the electrodes of the liquid crystal test cell;
- measuring an amount of light that exits the test cell;
- and
- based on the electrical driving signal and the measured light, determining the twist elastic constant (K22) for the liquid crystal mixture under test.
4 more elements
11-27. (canceled)
Dependencies are inferred from the claim text.