Measuring method of polarized light
A measurement method and a technology of polarization degree, which is applied in the direction of measuring device, optical instrument test, machine/structural component test, etc., can solve problems such as damage, polarizer deformation, and influence on polarization measurement results, so as to avoid damage and avoid Destructive, maneuverable effects
Active Publication Date: 2020-04-03
HUIZHOU CHINA STAR OPTOELECTRONICS TECHNOLOGY CO LTD
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Problems solved by technology
The disadvantage of the traditional method is that before the test, the polarizer to be tested needs to be removed from the TFT substrate or the CF substrate for testing. During the removal process, the polarizer will be deformed, which will affect the measurement results of the degree of polarization. This method is destructive measurement and cannot be monitored online in large quantities
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[0023] Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary only for explaining the present invention and should not be construed as limiting the present invention.
[0024] In describing the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", " Orientation indicated by rear, left, right, vertical, horizontal, top, bottom, inside, outside, clockwise, counterclockwise, etc. The positional relationship is based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating ...
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Abstract
A method for measuring a degree of polarization, for use in measuring the degree of polarization of a polarizer, comprising: making linearly polarized light in each direction incident to a module formed by combining a polarizer and a substrate, measuring the reflectivity of the module, using the maximum reflectivity of the module as a parallel reflectivity of the module, and using the minimum reflectivity of the module as an orthogonal reflectivity of the module; and calculating the degree of polarization of the polarizer according to the reflectivity of a reference polarizer, the reflectivity of a reference substrate, the parallel reflectivity of the module, and the orthogonal reflectivity of the module. By using the reflective measurement method, there is no need to remove the polarizer from the module before measuring the degree of polarization, thereby avoiding the impact on the degree of polarization of the polarizer due to damage to the module and damage to the polarizer. In addition, this method for measuring a degree of polarization can implement large-scale online monitoring and has high operability.
Description
technical field [0001] The invention relates to the field of display devices, in particular to a method for measuring the degree of polarization of a polarizer. Background technique [0002] With the advancement of display technology, thin film transistor liquid crystal display (TFT-LCD) has become the main product in the display market due to its advantages of lightness, thinness, low radiation, and small size without occupying space. [0003] The liquid crystal display mainly uses the linearly polarized light generated by two polarizers to achieve the display effect of bright and dark contrast. The main light source is provided by the backlight module, and the light passes through the first polarizing plate to produce linearly polarized light. After twisting with the arrangement of liquid crystal molecules, it passes through the second polarizing plate to produce bright and dark changes, and finally reaches the viewer. The display effect is achieved in the eye. [0004] ...
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IPC IPC(8): G01M11/02G02F1/13
CPCG01M11/00G02F1/1309
Inventor 陈俊吉
Owner HUIZHOU CHINA STAR OPTOELECTRONICS TECHNOLOGY CO LTD