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Method and device for measuring liquid crystal parameters

A parameter, liquid crystal technology, applied in the field of measuring liquid crystal parameters

Active Publication Date: 2014-09-24
IND TECH RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This technology only requires normal incidence, so it simplifies the design of the mechanism, and is not suitable for liquid crystal panels with small twist angles (such as: π-cell)

Method used

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  • Method and device for measuring liquid crystal parameters
  • Method and device for measuring liquid crystal parameters
  • Method and device for measuring liquid crystal parameters

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Embodiment Construction

[0032] The implementation example of the present invention is based on a Linear Polarization Generator and a Polarization Analyzer, combined with a theoretical model of a slice layer, and considering the variation of the twist angle and the pretilt angle in the thickness direction, the Linear Polarization Generator Projecting linearly polarized light with different azimuth angles on an object to be measured, and matching or comparing at least one liquid crystal optical parameter with light intensities obtained from multiple sets of polarized light characteristics formed by a polarization analyzer. The liquid crystal optical parameters are applicable to the measurement of liquid crystal panels of various orientation types.

[0033] figure 2 Shown is a schematic diagram of an example of a device for measuring liquid crystal parameters of the present invention. The device may include a linear polarized light generator 102, a first electric controller 201 to modulate the linear ...

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Abstract

A device and method for measuring liquid crystal parameters, which uses a first electronic control controller to modulate a linear polarization generator to generate linear polarization at different azimuth angles, and a second electronic control controller to modulate a polarization analyzer. This linear polarization generator receives incident light from a light source and extracts multiple incident light polarizations, and the linear polarization light generated by it at different azimuth angles is modulated by the first electronic control controller, so that the linear polarization light is adjusted to the set value. The tilt angle is projected onto a sample to be measured, and the transmitted light penetrating the sample to be measured is received by the polarization analyzer. The second electronic control controller is connected to the polarization analyzer to extract a specific polarization intensity, and then receives the polarization data from the polarization analyzer through a data processing device placed at the back end, and solves the problem using a layer theory model. Output at least one liquid crystal optical parameter.

Description

technical field [0001] The invention relates to a method and a device for measuring parameters of a liquid crystal (liquid Crystal Cell, LC Cell). Background technique [0002] Liquid crystal display technology has a wide range of applications, such as touch screens or 3D stereoscopic TVs, which are promising developments in various industry research institutions. Among them, the liquid crystal plays the role of an optical switch in the liquid crystal panel, and the optical parameters of the liquid crystal have a great influence on the quality of the image. For example, the thickness of a filled LC panel is different from that of an empty LC panel, and the uniformity of the thickness of the liquid crystal will greatly affect the image quality. In particular, high-quality multi-quadrant vertical alignment (MVA) panels have higher requirements on the uniformity of the liquid crystal gap, which will produce a brightness difference (mura) of less than 5mm for small uneven liqui...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02F1/13G02B27/28
CPCG01M11/30G02F1/1309H01L22/12
Inventor 江直融刘志祥
Owner IND TECH RES INST