Device and method for automatically and accurately positioning in touch screen and touch pen test equipment

Abstract

The invention discloses an automatic accurate positioning device and method in touch screen and touch pen testing equipment. The device comprises a testing platform, a three-axis linear displacement mechanism, a touch screen visual system, a measuring head visual system, a pressure sensing and collecting system, an angle rotating mechanism, a measuring head clamping mechanism and a data collecting and processing control system. The touch screen visual system is used for automatically positioning four corners of a VA area of a touch screen, the measuring head visual system is used for automatically positioning a central point of a measuring head, and the pressure sensing and collecting system is used for monitoring the testing pressure in the positioning and measuring process; the angle rotating mechanism is used for adjusting the angle of the measuring head; the measuring head clamping mechanism is used for clamping a measuring head. The method has the advantages that the alignment operation process of the test equipment can be simplified, and the overall test precision of the test equipment is improved.

Description

technical field [0001] The present invention relates to the technical field of touch screen testing, in particular to a device and method for automatic and precise positioning in touch screen and stylus pen testing equipment. Background technique [0002] The touch screen brings convenience to people when using electronic equipment, and the operation mode and corresponding products through the touch screen have been integrated into people's daily life, such as smart phones, tablet computers and so on. It is very convenient for people to click, slide and other basic operations on touch screen products with their fingers, but when they need fine or small graphics to operate, there will be problems such as failure to click or errors, and the stylus is designed to solve the problem. This problem, especially in recent years, with the promotion of Apple's Pencil and Microsoft's surface pen, active capacitive pens are gradually becoming popular. , support pen tilt angle and other ...

AI Technical Summary

Problems solved by technology

At present, there are some test methods and equipment for touch screens and products on the market, but these devices have the following problems: First, only copper rods or retractable pen tip fixtures can be used to simulate human fingers to test the touch screen, and there is no compatible test method. Active capacitive pen or testing equipment for active capacitive pens; the second is the positioning method, which is generally to manually control the movement mechanism to locate the starting point and end point of the test area of ​​the tested product through human eye observation or camera zoom-in imaging to assist observation. The operation method is more complicated and depends on the operator. Different people may have different results when operating. Third, there is no calibration function for the test contacts (usually copper rods). With the long-term operation of the equipment, or the installation position These deviations will affect the accuracy of the test results; the fourth is the lack of tilt angle test function

To be compatible with products such as copper rods, capacitive pens, and electromagnetic pens, the clamping mechanism cannot ensure that the center of the probe or capacitive pen / electromagnetic pen tip is exactly the same. If the center of the probe changes, the relative position relationship between the probe and the camera center will also change, in this case, there will be deviations in positioning using this method

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