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Ultrasonic fingerprint identification module and electronic device

A fingerprint recognition module, ultrasonic technology, used in character and pattern recognition, acquisition/organization of fingerprints/palmprints, instruments, etc.

Inactive Publication Date: 2019-03-19
NANCHANG OUFEI BIOLOGICAL IDENTIFICATION TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Based on this, it is necessary to provide an ultrasonic fingerprint recognition module and electronic equipment for the problem of how to optimize the performance of the ultrasonic fingerprint recognition module

Method used

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  • Ultrasonic fingerprint identification module and electronic device
  • Ultrasonic fingerprint identification module and electronic device
  • Ultrasonic fingerprint identification module and electronic device

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Embodiment Construction

[0019] In order to facilitate the understanding of the present invention, the present invention will be described more fully below with reference to the associated drawings. Preferred embodiments of the invention are shown in the accompanying drawings. However, the present invention can be embodied in many different forms and is not limited to the embodiments described herein. On the contrary, these embodiments are provided to make the understanding of the disclosure of the present invention more thorough and comprehensive.

[0020] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the technical field of the invention. The terminology used herein in the description of the invention is for the purpose of describing specific embodiments only, and is not intended to limit the present invention. As used herein, the term "and / or" includes any and all combinations of one or more of the ...

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Abstract

The invention relates to an ultrasonic fingerprint identification module and an electronic device. The ultrasonic fingerprint identification module comprises a cover plate and an ultrasonic sensor. The cover plate covers the ultrasonic sensor. The ultrasonic sensor is capable of emitting ultrasonic waves and detecting reflected ultrasonic waves. The ultrasonic sensor comprises a TFT substrate, a piezoelectric layer and an electrode layer. The piezoelectric layer, the electrode layer and the TFT substrate are stacked in a direction away from the cover plate side in turn, and the piezoelectric layer is bonded to the bottom surface of the cover plate through a first adhesive. According to the ultrasonic fingerprint identification module and the electronic device, as that piezoelectric lay, the electrode layer and the TFT substrate are sequentially arrange below the cover plate, ultrasonic waves generated by the piezoelectric lay only need to penetrate through the cover plate to reach thecontact object, thereby reducing the distance between the ultrasonic emission source (i.e. the piezoelectric layer) and the contact object, thereby reducing the ultrasonic wave loss and improving theultrasonic signal intensity.

Description

technical field [0001] The invention relates to the technical field of fingerprint identification, in particular to an ultrasonic fingerprint identification module and electronic equipment. Background technique [0002] Ultrasonic fingerprint recognition technology uses the ability of ultrasonic waves to penetrate materials, and produces echoes of different sizes with different materials (that is, when ultrasonic waves reach the surface of different materials, the reflected ultrasonic energy and the distance traveled are different) for fingerprint identification. of. Therefore, the location of the fingerprint ridge and the fingerprint valley can be distinguished by utilizing the difference in acoustic impedance between the skin and the air. Ultrasonic fingerprint recognition technology can conduct deeper analysis and sampling of fingerprints, and can even penetrate below the surface of the skin to identify the unique three-dimensional characteristics of fingerprints. Moreo...

Claims

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Application Information

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IPC IPC(8): G06K9/00
CPCG06V40/1306
Inventor 刘宣宣朱晃亿
Owner NANCHANG OUFEI BIOLOGICAL IDENTIFICATION TECH