Method for attaching mobile phone cover lens to liquid crystal display

Abstract

The invention relates to the field of machine vision and image processing, in particular to a method for attaching a mobile phone cover lens to a liquid crystal display .The method comprises the steps of detecting and positioning the angular point of the cover lens through Canny edge detection and Hough transformation, detecting and positioning the angular point of the liquid crystal display through wavelet algorithm, Sobel edge detection and Hough transformation, calculating the actual three-dimensional coordinates of the cover lens and the liquid crystal display through coordinate system transformation based on the stereoscopic parallax principle, and then adjusting the cover lens and the liquid crystal display according to the three-dimensional coordinate difference value of the two to coincide in the X-Y plane, so that automatic attaching of the cover lens and the liquid crystal display is achieved under visual guidance .By the adoption of the method, automatic attaching of the cover lens and the liquid crystal display is achieved, attaching speed is high, efficiency and precision are high, processes are simple, no personnel limitation is set, manpower resource is saved a lot, cost is low, and adaptability is high.

Description

technical field [0001] The invention belongs to the field of machine vision and image processing, and in particular relates to a bonding method of a mobile phone cover glass and a liquid crystal screen. Background technique [0002] Machine vision (Machine Vision, referred to as MV) is a device that automatically receives and processes an image of a real object through optical devices and non-contact sensors to obtain the required information or to control machine movement. In short, machine vision is a system that uses machine cameras to capture images and uses computers for calculation and processing to replace human eyes to complete measurement and judgment. [0003] At present, machine vision has been successfully applied in the field of industrial inspection, which has greatly improved the quality and reliability of products and ensured the efficiency of production. On the one hand, it can be used to replace artificial vision and reduce labor costs; on the other hand, ...

AI Technical Summary

Problems solved by technology

For the ever-increasing demand for touch screens, in the production of industrial mobile phones, many of the chip production and the production and installation of the shell are completed by automated assembly lines. With working experience and high lamination technology, and the existing schemes mostly rely on molds, different types and sizes of mobile phone screens require corresponding molds to complete the lamination, which is inconvenient to use and high in cost

The liquid crystal display screen of a mobile phone is the most intuitive thing of a mobile phone. Its fitting accuracy will have a serious impact on the quality of the product. For this reason, it is necessary to use a special defect detector to detect it in production to ensure Sufficient precision, many processes, high cost

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