Method for online detection of warpage of glass cover plate

Abstract

The invention discloses a method for online detection of warpage of a glass cover plate. An image deformation degree of a glass reflecting grating plate is collected through a camera on the basis of a grating plate, and quantized data of the warpage deformation degree of the glass plate is reflected through treatment of a computer information technology software system. The method is simple in design principle; the device is low in cost in comparison with that in other detection methods; software research and development are simple and feasible; the operation is simple and the efficiency is high; and above all, the targets of full detection of the warpage of a product and quantization of a warpage image can be achieved and the detection accuracy is high.

Description

[0001] 【Technical field】 [0002] The invention belongs to the detection field, and in particular relates to a method for online detection of cover glass warpage. [0003] 【Background technique】 [0004] Since entering the era of touch control, capacitive touch screen solutions have become the mainstream of human-computer interaction for mobile terminals such as mobile phones, tablets, and touch notebooks due to their advantages such as stable performance and good tactile sensation. Regardless of the touch technology, the cover is an essential protective component, and the cover glass has gradually become the mainstream of the cover due to its high light transmission and strong scratch resistance. [0005] Cover glass inspection items and inspection methods are also being continuously established and improved. Cover glass warpage image inspection is an important inspection item for monitoring product warpage quality, which is essential. Product warping and poor quality can ca...

AI Technical Summary

Problems solved by technology

In the warpage image detection, the sample is placed on a glass support device, and a grid plate is installed in the opposite direction of the glass. Due to the principle of light reflection, the image of the grid plate will appear in the glass. The inspector uses a camera to take pictures of the glass. And compared with the limit sample, evaluate the deformation of the grid plate in the glass; the three-coordinate detection of the change of the warpage amount, place the product that has been detected by the warp image on the three-coordinate platform, and pass the glass surface and the standard The measurement of the change of the horizontal plane, so as to measure the warpage change of the glass, and evaluate it. According to the evaluation results of the two methods, the warpage of the glass is finally evaluated. However, the two detection methods cannot correspond. Currently, the image Mainly visually, can not be quantified

[0007] This kind of operation method is time-consuming and laborious, and the warped image detection is visual inspection of the warped image quality. The difference between the skills of the inspectors leads to the inconsistency of the inspection standards and inaccurate inspection results.

Moreover, the results of these two methods of detection and testing cannot correspond, and the detection method is unscientific

[0008] On the other hand, since this method of operation is only applicable to sampling operations, when the quality of the production line is unstable, the warpage quality of the product within the two sampling intervals is not stable, so the risk of missed inspection is relatively high

Images