Method and device for measuring cylindrical spacer

Abstract

The invention discloses a method and a device for measuring a cylindrical spacer. The method comprises the following steps of: 1. pre-storing a standard image into a computer and pre-setting the positioning precision of the position of the cylindrical spacer; 2. using a measuring lens to collect the current image of the designated measurement position of the cylindrical spacer, and comparing the current image with the standard image; 3. determining whether the comparison result is in line with the preset positioning precision, if so, implementing the step 5, if not, implementing the step 4; 4.correcting the measurement position of the cylindrical spacer, and implementing the step 2; and 5. measuring the cylindrical spacer at the current position. The device comprises an image collection system, a microcomputer control system, a position correcting system and a measurement system of the cylindrical spacer. The method and the device for measuring the cylindrical spacer can achieve the automatic, high-efficient and precise positioning effect of the measurement position of the cylindrical spacer.

Description

technical field [0001] The invention relates to the field of liquid crystal display manufacture, in particular to a method and device for measuring columnar spacers. Background technique [0002] With the wide application of liquid crystal display, its production technology is constantly improving. At present, in the production process of liquid crystal display screens, the quality of liquid crystal display screens is directly related to whether the amount of liquid crystal injection is appropriate. A key parameter to measure whether the amount of liquid crystal injection in the LCD is appropriate is the height of the columnar spacers, so whether the measurement of the height of the columnar spacers is accurate will directly affect the quality of the LCD. For an ordinary 17-inch LCD display, there are millions of columnar spacers distributed on its color filter. When measuring process data, it is necessary to measure the height of a considerable number of columnar spacers. ...

AI Technical Summary

Problems solved by technology

First of all, when measuring the height of the columnar spacer, it is necessary to manually move the lens to the designated position, and then select an appropriate storage position according to the design characteristics of the columnar spacer and the position of the reference plane, which leads to the need for the operator to manually The measurement positions of the spacers are selected and saved one by one. The columnar spacer inspection equipment cannot intelligently select the images to be collected correctly. At this time, the template production is time-consuming, laborious and inefficient.

Secondly, due to different color filters, there are differences in the calibration effect, and the positioning of the columnar spacer in the field of view of the lens is also very demanding. As a result, the column spacer height measured by the edited selected column spacer is inaccurate when the measurement position deviates unexpectedly, and the column spacer inspection equipment itself cannot automatically identify and correct it.

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