Device and method for measuring warping degree of substrate, touch screen and manufacturing method of touch screen

Abstract

The invention discloses a device and method for measuring the warping degree of a substrate, a touch screen and a manufacturing method of the touch screen. The measuring device comprises at least one laser device and charge coupling elements which correspond to the laser devices in a one-to-one mode and are fixedly connected with the laser devices. The measuring device is moved in a plane parallel to the surface, to be measured, of the substrate, lasers emitted by the laser devices irradiate multiple measuring points of the surface to be measured, and the lasers are received by the charge coupling elements after being reflected at the measuring points. According to the position offset of the lasers irradiating to the laser incidence faces of the charge coupling elements, the distance of a reference point, the preset incident angles of the lasers emitted by the laser devices and the position relation between the laser devices and the corresponding charge coupling elements are preset, and the warping degree of all the measuring points can be obtained rapidly and accurately. In the manufacturing process of the touch screen, the warping degree of a touch panel and the warping degree of a display panel are measured through the measuring device, the warping degrees of the two panels are controlled strictly, only the two panels with smaller warping degrees are attached to each other, and the yield of the touch screen can be improved.

Description

technical field [0001] The invention relates to the field of display technology, in particular to a measuring device and method for warpage of a substrate, a touch screen and a manufacturing method. Background technique [0002] According to the composition and structure, the touch screen can be divided into: Add on Mode Touch Panel, On Cell Touch Panel, and In Cell Touch Panel. Wherein, the plug-in touch screen is formed by laminating a touch panel and a display panel. [0003] At present, the manufacturing process of the plug-in touch screen specifically includes the following steps: first, make the touch panel and the display panel respectively; then, remove the centrifugal film on the surface of the touch panel and the display panel respectively; The control panel and the display panel are cleaned separately; after that, the water glue is applied to the entire surface of the touch panel where the centrifugal film is removed, and the frame glue is applied to the non-disp...

AI Technical Summary

Problems solved by technology

When the touch panel with a large warpage is bonded to the display panel with a large warpage, air bubbles are likely to be generated, and the touch panel with a large warpage and the display panel with a large warpage It is easy to fall off after the bonding process, which seriously affects the yield rate of the external touch screen

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