Capacitive touch screen with fingerprint recognition function and manufacturing method

Abstract

The present invention discloses a capacitive touch screen with a fingerprint recognition function and a manufacturing method. The capacitive touch screen comprises an ITO substrate, an ITO circuit layer arranged on the ITO substrate, and a flexible circuit board connected to the ITO circuit layer. The ITO circuit layer comprises a plurality of ITO wires, and the plurality of the ITO wires form a plurality of capacitive sensing points. The wire width of the ITO wire is a preset wire width value, so that the capacitive sensing points can sense different capacitance values of fingerprint ridges and fingerprint valleys. The flexible circuit board recognizes fingerprint information according to the different capacitance values of the fingerprint ridges and the fingerprint valleys. According to the capacitive touch screen, cover glass is not required to be provided with a hole for arranging a fingerprint recognition module, so that the production cost is reduced, production efficiency is improved, and strength of the cover glass is ensured, thereby ensuring quality of a final product of the capacitive touch screen. In addition, the cover glass is not required to be provided with a hole, and the situation that the fingerprint recognition module cannot be installed due to the limit of the entire device is avoided, so that product application is wider.

Description

technical field [0001] The invention relates to the field of capacitive touch screens, in particular to a capacitive touch screen with a fingerprint identification function and a manufacturing method. Background technique [0002] With the wide application of electronic products such as smartphones and tablet computers and the development of touch screen technology, it has become a trend in the development of current electronic products to apply touch screens to electronic products such as smart phones and tablet computers to realize human-computer interaction functions. Fingerprints refer to the uneven lines on the skin on the front of the end of a human finger. The lines are regularly arranged to form different patterns. Fingerprint identification technology is currently the most mature and cheap biometric identification technology, which has a wide range of applications, such as notebook computers, mobile phones, automobiles, bank payments and other fields. [0003] At p...

AI Technical Summary

Problems solved by technology

[0005] Since it is necessary to open a hole 17 on the cover glass 14 to place the fingerprint identification module, the strength of the glass cover is damaged, resulting in an increase in production costs, a decrease in efficiency, and may affect the quality of the finished product to a certain extent.

Moreover, due to the limitation of the whole machine, the touch screen of some electronic products cannot open the hole 17 on the cover glass 14, making it impossible to install the fingerprint recognition module

In addition, since the touch module and the fingerprint recognition module are set independently, two independent circuit boards need to be installed on the capacitive touch screen, and the corresponding sensing circuit should be processed, which makes its production cost relatively high.

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