Method and apparatus for testing a liquid crystal cell

Abstract

A test method for a liquid crystal display panel in which the pixels providing liquid crystal elements having sealed in liquid crystal material are arranged in a matrix between opposing electrodes is comprised of a charging process for supplying charge to the above-mentioned liquid crystal element of a pixel under test, a measurement process for discharging the charge from the above-mentioned charged liquid crystal element and measuring the amount of charge discharged, and a decision process for determining whether defects are present in the liquid crystal element of the above-mentioned pixel under test from the above-mentioned measurement results.

Description

technical field [0001] The present invention relates to a manufacturing method, an inspection method and an inspection device of a display panel, in particular to a manufacturing method of a liquid crystal display panel sealed with a liquid crystal material. Background technique [0002] A mainstream display device using a liquid crystal material is composed of a backlight as a light source, a polarization filter that transmits only light having a certain polarization state, a display panel that controls the polarization state of light for each pixel, and Manufactures color filters for the three primary colors. Among them, the general structure of a display panel is to arrange liquid crystal elements on an active matrix array substrate, wherein the active matrix array substrate is obtained by forming elements such as transistors and storage capacitors for each pixel on a substrate such as a glass plate. [0003] FIG. 2 shows the structure of a liquid crystal element 233 of ...

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Problems solved by technology

[0005] However, although the pixels on a liquid crystal display panel preferably have uniform characteristics, it is difficult to form a panel with stable characteristics over a wide area by existing manufacturing techniques

For example, if a foreign matter is mixed in the region where the liquid crystal material is sealed, or the gap between the opposing electrodes 300 and 304 becomes uneven, or a defect occurs in the formation stage of the alignment films 301 and 304, or the liquid crystal material 302 itself If it is not uniform, it will cause defects due to various reasons

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