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Method and device for measuring liquid crystal display compensation film in-plane phase difference values

A phase difference, liquid crystal display technology, applied in nonlinear optics, instruments, optics, etc., can solve the problems of reduced picture contrast and picture clarity, and achieve the effect of low measurement cost

Active Publication Date: 2017-03-22
TCL CHINA STAR OPTOELECTRONICS TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] As the viewing angle of the liquid crystal display increases, the contrast of the picture decreases continuously, and the clarity of the picture decreases.

Method used

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  • Method and device for measuring liquid crystal display compensation film in-plane phase difference values

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Embodiment Construction

[0044] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0045] In the description of the present invention, it should be noted that unless otherwise specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection. Ground connection, or integral connection; can be mechanical connection; can be directly connected, can also be indirectly connected through an intermediary, and can be i...

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Abstract

The invention discloses a method for measuring liquid crystal display compensation film in-plane phase difference values. The method includes simulating light leakage variation of the different liquid crystal display compensation film in-plane phase difference values; selecting compensation film in-plane phase difference values to be used as standards according to the simulated light leakage variation and acquiring ratio multiples of different compensation film in-plane phase difference values and standard compensation film in-plane phase difference values; fitting relational expressions of the compensation film in-plane phase difference values and light leakage multiples by the aid of the ratio multiples; utilizing liquid crystal display compensation films with known compensation film in-plane phase difference values as standards and measuring light leakage values of the liquid crystal display compensation films; measuring light leakage values of liquid crystal display compensation films with to-be-measured compensation film in-plane phase difference values; acquiring light leakage ratios of the measured light leakage values of the liquid crystal display compensation films with the to-be-measured compensation film in-plane phase difference values to standard light leakage values for measuring compensation film surfaces of liquid crystal displays; substituting the light leakage ratios into the fitted relational expressions of the compensation film in-plane phase difference values and the light leakage multiples to calculate the to-be-measured liquid crystal display compensation film in-plane phase difference values.

Description

technical field [0001] The invention relates to the technical field of liquid crystal display, in particular to a method and device for measuring the in-plane retardation value of a liquid crystal display compensation film. Background technique [0002] As the viewing angle of the liquid crystal display increases, the contrast of the picture decreases continuously, and the definition of the picture decreases. This is the result of the birefringence of the liquid crystal molecules in the liquid crystal layer changing with the viewing angle. Using a wide viewing angle compensation film to compensate can effectively reduce the light leakage of the dark state screen and greatly improve the contrast of the screen within a certain viewing angle. [0003] The compensation film has an in-plane retardation value Ro and an out-of-plane retardation value Rth in the thickness direction. The Ro of the compensation film will affect the dark state light leakage and taste of the liquid crys...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02F1/13
Inventor 海博
Owner TCL CHINA STAR OPTOELECTRONICS TECH CO LTD
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