A method for realizing positioning and lamination of cover glass and liquid crystal screen

Abstract

The invention discloses a method for realizing the positioning and bonding of a cover glass and a liquid crystal screen. The steps include: acquiring the image of the cover glass and the LCD screen, detecting the feature points in the image, selecting a group of diagonal marks and connecting lines through conditional restrictions, and refining the pixel coordinate values ​​of the obtained feature points to obtain sub-pixels level coordinates, obtain control parameters, control the movement of the cover glass and LCD screen to complete the single-purpose preliminary verification; obtain the image of a group of corner points of the cover glass and LCD screen, detect the edge of the image, and obtain the image with only the edge line Image; finally extract the straight line in the edge image, and filter the line to determine the two edge straight lines of the required corner points, calculate the coordinates of the corner points, and obtain the midpoint coordinates of the cover glass and the diagonal of the LCD screen and The slope, the coordinate difference between the two midpoints and the angle between the two straight lines; control the movement of the cover glass and the LCD screen so that the two straight lines are parallel and the midpoints coincide, and the touch screen cover glass and the LCD screen are bonded together.

Description

technical field [0001] The invention relates to the field of image processing, in particular to a method for laminating a cover glass of a touch screen and a liquid crystal screen based on machine vision guidance. Background technique [0002] Driven by high-end electronic products in recent years, the market size of the touch screen industry has also continued to expand. The touch screen has many advantages such as responsiveness, convenient operation, and low cost. With this technology, as long as you touch the corresponding icon or text on the LCD screen with your finger, you can operate applications such as software access or text editing, which makes human-computer interaction more friendly. Extremely intuitive, and this technology also greatly facilitates the user's operation. Today, touch screens can be widely used in products such as smart phones, tablet computers, and vehicle-mounted mobile terminals. [0003] For the ever-increasing demand for touch screens, in ...

AI Technical Summary

Problems solved by technology

[0003] For the ever-increasing demand for touch screens, in industrial mobile phone production projects, most of the chip production and casing production and installation are completed by automated assembly lines, but the screen pasting process still requires manual operations.

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