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Fingerprint sensor and electronic equipment

A fingerprint sensor and sensing electrode technology, applied in the direction of acquiring/arranging fingerprints/palmprints, instruments, time registers, etc., can solve problems such as damage to fingerprint sensor components

Active Publication Date: 2017-05-31
柳州梓博科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As a human-machine interface, the fingerprint sensor needs to be in contact with the human finger and the outside world. Electrostatic discharge (ESD) will directly enter the fingerprint sensor, which may easily cause damage to the internal components of the fingerprint sensor.

Method used

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  • Fingerprint sensor and electronic equipment
  • Fingerprint sensor and electronic equipment
  • Fingerprint sensor and electronic equipment

Examples

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Embodiment Construction

[0025] Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary only for explaining the present invention and should not be construed as limiting the present invention.

[0026] In the description of the present invention, it should be understood that the terms "first" and "second" are used for description purposes only, and cannot be interpreted as indicating or implying relative importance or implicitly indicating the quantity of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of said features. In the description of the present invention, "plurality" means two or more, unless otherwise specifically defined.

[0027] In the de...

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Abstract

The invention discloses a fingerprint sensor and electronic equipment. The fingerprint sensor comprises sensing electrodes, a protective layer and operational amplifiers. The protective layer and the sensing electrodes are arranged in the same layer, the protective layer is arranged surrounding each sensing electrode, and is connected to a reference ground, and the reference ground loads changing reference signals. Each operational amplifier comprises an amplifier and a feedback branch, the amplifier comprises an in-phase end, an anti-phase end and an output end, the anti-phase end is connected with one corresponding sensing electrode, the feedback branch is connected between the anti-phase end and the output end, the in-phase end is connected to the reference ground directly or indirectly, and thus, the voltage difference between the sensing electrodes and the protective layer is kept unchanged. In the fingerprint sensor, when an electrostatic discharge (ESD) phenomenon occurs in the surface of the fingerprint sensor, electrostatic energy can be released to the reference ground via the protective layer, and the ESD resistance of the fingerprint sensor can be improved. The voltage difference between the sensing electrodes and the reference ground is kept unchanged, so that the sensitivity of the fingerprint sensor is not influenced.

Description

technical field [0001] The invention relates to the field of fingerprint identification, and more specifically, to a fingerprint sensor and electronic equipment. Background technique [0002] In related technologies, with the popularization of fingerprint sensors in smart mobile terminals, the demand for fingerprint sensors is increasing. As a human-machine interface, the fingerprint sensor needs to be in contact with human fingers and the outside world. Electrostatic discharge (ESD) will directly enter the fingerprint sensor, which may easily cause damage to the internal components of the fingerprint sensor. Contents of the invention [0003] The embodiments of the present invention aim to solve at least one of the technical problems in the prior art. Therefore, the embodiment of the present invention needs to provide a fingerprint sensor and an electronic device. [0004] A fingerprint sensor includes a plurality of sensing electrodes, a protective layer and a pluralit...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06K9/00G06F21/32G07C9/00
CPCG06F21/32G07C9/257G07C9/37G06V40/1306
Inventor 王小明
Owner 柳州梓博科技有限公司
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