A sensor and its preparation method, panel and identification device

An identification device and sensor technology, applied in the field of electronics, can solve the problems of short life, low yield, and difficult preparation of ultrasonic fingerprint identification devices, and achieve the advantages of improving yield and life, reducing preparation difficulty, and high-voltage electricity conversion efficiency. Effect

Active Publication Date: 2020-04-07
BOE TECH GRP CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The ultrasonic fingerprint recognition device has problems such as high difficulty in preparation, low yield, short life, and inapplicability to flexible displays.

Method used

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  • A sensor and its preparation method, panel and identification device
  • A sensor and its preparation method, panel and identification device
  • A sensor and its preparation method, panel and identification device

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Embodiment Construction

[0041] In order to make the purpose, technical solution and advantages of the present invention more clear, the embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined arbitrarily with each other.

[0042] The steps shown in the flowcharts of the figures may be performed in a computer system, such as a set of computer-executable instructions. Also, although a logical order is shown in the flowcharts, in some cases the steps shown or described may be performed in an order different from that shown or described herein.

[0043] Unless otherwise defined, the technical terms or scientific terms used in the present disclosure shall have the usual meanings understood by those skilled in the art to which the present invention belongs. "First", "second" and similar words used i...

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Abstract

A sensor and its preparation method, a panel, and an identification device, the sensor comprising: a substrate, a first electrode layer arranged on the substrate, a second electrode layer arranged on the side of the first electrode layer away from the substrate An electrode layer, a piezoelectric layer disposed between the first electrode layer and the second electrode layer and coupled to the first electrode layer and the second electrode layer respectively, wherein: the piezoelectric layer is away from Orthographic projections on the substrate from one side of the substrate to a side close to the substrate decrease sequentially. The sensor provided by an embodiment of the present invention reduces the difficulty of preparation and improves the service life.

Description

technical field [0001] The invention relates to electronic technology, in particular to a sensor, a preparation method thereof, a panel and an identification device. Background technique [0002] Biometric identification technology is an important direction for the development of display panels and modules. At present, the common implementation methods are capacitive sensing, optical detection, pressure sensing, temperature sensing and ultrasonic detection. Ultrasonic detection method has been paid more and more attention because of its advantages of no contact, no occlusion, and high precision. Such as figure 1 As shown, the current ultrasonic fingerprint identification device includes: upper electrode 1-1, piezoelectric material 1-2, lower electrode 1-3, pad 1-4, air 1-5 and substrate 1-6. The ultrasonic fingerprint identification device has problems such as high difficulty in preparation, low yield rate, short lifespan, and inability to be applied to flexible displays. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06K9/00
CPCG06V40/1306H10N30/302H10N30/87H10N30/1051
Inventor 王强
Owner BOE TECH GRP CO LTD
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