Fingerprint identification display panel, production method thereof, driving method thereof, and display device

Abstract

The invention discloses a fingerprint identification display panel, a production method thereof, a driving method thereof, and a display device. A plurality of ultrasonic wave detection units, a plurality of identification scanning lines, and a plurality of identification output lines are disposed in the display device. Every ultrasonic wave detection unit comprises a pressure-sensing unit used for generating ultrasonic waves and sensing the changes of the ultrasonic waves caused by pressing of fingerprints, and a control switch transistor used for controlling the pressure-sensing unit to convert the changes of the ultrasonic waves into different signals for output. When fingers of users are close to the surface of the display device, because of the uneven ridges and the uneven valleys of the skins of the fingers, the intensities of the ultrasonic waves transmitted by the pressure-sensing units reflected by the positions of the ridges and the valleys of the fingers back to the pressure-sensing units are different, and then the differences of the current signals converted by the pressure-sensing units are caused, and therefore the detection of the fingerprints is realized. The pressure-sensing unit is used for the detection of the fingerprints based on piezoelectric effect, and interferences on the internal parts in the display device are not easy to generate, and therefore high-quality fingerprint detection is easily realized.

Description

technical field [0001] The invention relates to the field of liquid crystal modules, in particular to a fingerprint recognition display panel, a manufacturing method thereof, a driving method thereof and a display device. Background technique [0002] With the rapid development of display technology, display panels with a fingerprint recognition function have gradually spread in people's lives. At present, fingerprint recognition display panels generally adopt capacitive structure to realize the function of fingerprint recognition. For example, in-cell fingerprint recognition display The fingerprint identification component is likely to generate parasitic capacitance with the components inside the display panel, so that the fingerprint identification detection signal and the display signal interfere with each other, thereby affecting the quality of fingerprint identification. Contents of the invention [0003] In view of this, the embodiments of the present invention prov...

AI Technical Summary

Problems solved by technology

At present, fingerprint recognition display panels generally adopt capacitive structure to realize the function of fingerprint recognition. For example, in-cell fingerprint recognition display Fingerprint identification components are easy to generate parasitic capacitance with the components inside the display panel, which makes the fingerprint identification detection signal and display signal interfere with each other, thus affecting the quality of fingerprint identification

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