Two-piece small-size liquid crystal panel conveying accuracy monitoring method

Abstract

The invention relates to a conveying precision monitoring method for double small liquid crystal panels. The method is characterized by comprising the following steps that 1, a liquid crystal panel A and a liquid crystal panel B are marked; 2, a CCD lens is used for irradiating the MARKs at the left end and the right end of the liquid crystal panel A and the liquid crystal panel B respectively, recording the positions, and marking the positions of the MARKs in a rectangular plane coordinate system built in an image processing system, wherein the MARKs are recorded as A1, A2, B1 and B2 respectively; 3, a straight line a is made according to A1 and B2, the included angle between the straight line a and the X axis is the angle 1, a straight line b is made according to A2 and B1, the included angle between the straight line b and the X axis is the angle 2, and the Q-type error delta Q is made to be equal to an absolute value of a difference between the angle 1 and the angle 2; 4, if delta Q is greater than 4.5 degrees, it is judged that the panels are in a Q-type position variation state, otherwise the next step is carried out; 5, the vertical coordinate delta Y1 of the intersection point between the straight line a and the Y axis and the vertical coordinate delta Y2 of the intersection point between the straight line b and the Y axis are solved, and the Y-type error is made to be an absolute value of a difference between the delta Y1 and the delta Y2; 6, if the absolute value of the difference between the delta Y1 and the delta Y2 is greater than one, it is judged that the panels are in a Y-type position variation state, otherwise it is judged that the panels are not in a position variation state. The conveying precision monitoring method for the double small liquid crystal panels can improve the panel conveying precision and reduce the panel breaking risk and quality hidden danger.

Description

technical field [0001] The invention relates to a method for monitoring the conveying accuracy of a double-piece small-size liquid crystal panel. Background technique [0002] At the end of 2012, CTOC decision-makers decided to transform small and medium-sized modules and transform the 4th line of installation. After the transformation, if the operation cost of continuing to use a single-chip LCD panel is high, there is little profit to be discussed, so the 4-line transformation is based on the simultaneous operation of two-chip LCD panels. In 2013, 4M completed the transformation and mass production of 4#, and introduced the dual-chip LCD panel simultaneous operation mode to increase the production capacity from 8K / day to 12K / day. But there is following shortcoming simultaneously: 1, conveying precision is low. Due to the transfer of two-chip LCD panels, each time the P&P is transported, the LCD panel will be slightly displaced. In the past, the CCD image can be used to c...

AI Technical Summary

Problems solved by technology

But there are the following disadvantages at the same time: 1. Low conveying accuracy

Due to the transfer of two-chip LCD panels, each time the P&P is transported, the LCD panel will be slightly displaced. In the past, the CCD image can be used to correct the single-chip operation, but the CCD image correction of the two-chip LCD panel at the same time can only be corrected. The limitation of taking MARK from both ends of the double-chip LCD panel will affect the calibration accuracy; 2. The risk of fragmentation is high

The movement of the LCD panel in the ACF sticking mechanism and the pressing mechanism will cause fragments; 3. High quality hidden dangers

The movement of the liquid crystal panel will cause the ACF to be attached to the skew, the voltage is not good, and the area of ​​the conductive particles of the voltage is insufficient

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