Positioning method, device and system

Abstract

The embodiment of the invention provides a positioning method, device and system, and relates to the technical field of electronics. The accuracy and efficiency of wiping a printing plate are improved. The scheme includes the steps that if a substrate comprises a bad point position, the positioning device obtains first coordinate information, in a substrate coordinate system, of the bad point position, and the first coordinate information is used for indicating the position, on the substrate, of the bad point position; according to the preset coordinate corresponding relation between the substrate coordinate system and a printing plate coordinate system, the positioning device converts the first coordinate information into second coordinate information in the printing plate coordinate system, and the second coordinate information is used for indicating the position, corresponding to the bad point position on the substrate, of the printing plate; the positioning device outputs a position signal, corresponding to the second coordinate information, on the printing plate. The scheme can be used for positioning the bad point position on the printing plate.

Description

technical field [0001] The invention relates to the field of electronic technology, in particular to a positioning method, a positioning device and a positioning system. Background technique [0002] Liquid Crystal Display (LCD) is mainly composed of an array substrate and a color film substrate. During the manufacturing process of a liquid crystal display, an alignment film needs to be printed on the array substrate or color film substrate by a printing machine, so that the liquid crystal molecules in the liquid crystal display arranged in a certain direction. [0003] Such as figure 1 As shown, the printing machine 100 specifically includes a plate barrel 01, an APR (Ashahikasei Photosensitive Resin, a resin plate for liquid crystal alignment film printing, also called a printing plate) 02, and an alignment film 03 attached to the APR 02. The printing machine 100 is rotating The alignment film 03 is printed on the surface of the substrate 04 (array substrate or color fil...

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Problems solved by technology

[0004] However, in the above-mentioned printing process, the APR 02 may be polluted. At this time, there will be defective spots on the APR 02. Then, when the printing machine 100 prints the alignment film 03 to the substrate 04, it will cause the substrate 04 to be contaminated. Bad spots also appear on the corresponding positions of the bad spots on APR 02. Therefore, it is necessary to wipe the contaminated bad spots on APR 02 in time to ensure the printing quality of substrate 04.

[0005] At present, when determining the bad points on the APR 02, it mainly relies on the identification and judgment of the human eye. Obviously, this method of determining the bad points on the APR 02 is time-consuming and laborious, and cannot guarantee the accuracy of the bad points determined. Accuracy, and thus the APR 02 cannot be accurately wiped

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