Measuring method of optical path differences of liquid crystal display panels

Abstract

The invention discloses a measuring method of optical path differences of liquid crystal display panels. The measuring method comprises the following steps: obtaining brightness corresponding to the at least two optical path differences under the same preset condition; according to the brightness corresponding to the different optical path differences, fitting to obtain a relation between the optical path difference when the reference optical path difference of the first reference liquid crystal display panel is taken as the fixed optical path difference and the brightness ratio; under the preset condition, calculating the brightness ratio of the to-be-measured liquid crystal display panel to the first reference liquid crystal display panel; obtaining the optical path difference of the to-be-measured liquid crystal display panel according to a relation between the brightness ratio and the optical path difference. In such a manner, the optical path difference of the to-be-measured liquid crystal display panel is obtained by utilizing the relation between the optical path difference and the brightness ratio, so that the measuring process of the optical path difference of the liquid crystal display panel is simplified, and the measuring cost is reduced.

Description

technical field [0001] The invention relates to the field of optical technology, in particular to a method for measuring the optical path difference of a liquid crystal panel. Background technique [0002] At present, liquid crystal panels have gradually become an important role in consumer electronics products, and are widely used in displays of devices such as mobile terminals with high-resolution color screens. The liquid crystal panel includes a dark state that does not pass light and a bright state that can be turned off. The liquid crystal display acts as a voltage-controlled light valve during the switching between the dark state and the bright state and the entire display process. The transmittance of the liquid crystal panel is the ratio between the transmitted luminous flux and the total incident luminous flux when the liquid crystal display is in the dark state, that is, the transmittance of the liquid crystal panel characterizes the degree of light leakage of the...

AI Technical Summary

Problems solved by technology

In the prior art, special equipment is often used to measure the optical path difference of the liquid crystal panel. During the measurement process, the polarizer of the liquid crystal panel needs to be removed. The measurement process is complicated and will cause damage to the liquid crystal panel. In addition, these dedicated The equipment is usually large in size, occupies a large area, and is expensive, resulting in a high cost for the measurement of the transmittance of the liquid crystal display.

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