A location method of pasting ACF membrane on screen substrate of flat-panel display

Abstract

The invention provides a location method of pasting ACF membrane on screen substrate of flat-panel display, which is characterized by: defining two identification points on the screen substrate in advance; after the screen substrate is moved onto calibrating countertop, performing initial location by the appearance of the substrate, capturing images of the two identification points by a camera, translating images of the two identification points into position coordinates of image coordinate system by image processing system, translating the image coordinate value of the two identification points into machinery coordinate value in machinery coordinate system according to the correspondent relationship between image coordinate system and machinery coordinate system, determining the offset between practical position and theoretical position in the direction of X axis, the offset in the direction of Y axis, and the angular deflection around Z axis by calculating, adjusting the position of the two identification points to theoretical position by using the motion mechanism in the direction of X axis, the motion mechanism in the direction of Y axis, the rotating mechanism around Z axis, thereby ensuring that the position of driving terminal area on the screen substrate and the position of the ACF membrane required to be pasted are aligned. The present invention greatly improves the location accuracy of the ACF membrane pasted.

Description

technical field [0001] The invention relates to the field of processing and manufacturing of flat panel displays, in particular to an alignment method for pasting ACF films on LCD or PDP display substrates. Background technique [0002] In the manufacturing process of flat panel displays (FPD) such as LCD (liquid crystal) and PDP (plasma), it is important to correctly assemble drive circuits such as driver ICs or FPC (Flexible Printed Circuit) into the drive terminal area of ​​the display substrate. The purpose of the work is to drive the display screen to correctly display text and pattern information. ACF film attachment is a process of attaching an ACF film on the drive terminal area of ​​the display substrate to mount a drive circuit such as a driver IC or FPC. ACF film (Anisotropic Conductive Film) is an anisotropic conductive film, which is a film with conductive particles scattered on an adhesive resin. The principle and process of LCD or PDP display substrate carry...

AI Technical Summary

Problems solved by technology

The above-mentioned Japanese patent relies on the shape of the LCD liquid crystal panel to locate the method, which cannot guarantee the accuracy requirements of ACF film application. Among them, the position error may directly lead to the appearance of defective products loaded with IC, and the excessive length of ACF film application will not only cause high-priced products. ACF film is wasteful and will cause short circuit

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