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Fingerprint detection method, fingerprint detection device and mobile terminal

A fingerprint detection and fingerprint technology, which is applied in the direction of acquiring/arranging fingerprints/palmprints, character and pattern recognition, instruments, etc., can solve time-consuming problems, achieve the effect of ensuring quality and improving processing efficiency

Active Publication Date: 2019-04-19
CHIPONE TECH BEIJINGCO LTD
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  • Fingerprint detection method, fingerprint detection device and mobile terminal
  • Fingerprint detection method, fingerprint detection device and mobile terminal
  • Fingerprint detection method, fingerprint detection device and mobile terminal

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[0051] The present application will be described in more detail below with reference to the accompanying drawings. In the various figures, like elements are designated by like reference numerals. For the sake of clarity, various parts in the figures have not been drawn to scale. Additionally, some well-known parts may not be shown.

[0052] It should be pointed out that although fingerprint detection is used as an example in this article, the fingerprint detection method and detection device provided by the present invention are also applicable to other fingerprints, such as palm print, toe print, sole print, hand shape, iris, retina, etc. Detection and recognition of characteristic fingerprints.

[0053] Figure 3a It is a schematic circuit diagram of the signal processing circuit of the fingerprint detection device according to the embodiment of the present invention. The signal processing circuit includes a signal source 330 , an amplifier 320 and an analog-to-digital con...

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Abstract

The invention provides a fingerprint detection method, a fingerprint detection device and a mobile terminal. The fingerprint detection method comprises the following steps: collecting a first fingerprint image of a fingerprint by adopting an initial first parameter combination; Obtaining a fingerprint signal interval corresponding to the first fingerprint image; Comparing the fingerprint signal interval with a capacitance value range in a pre-stored configuration table to obtain a second parameter combination; And collecting a second fingerprint image of the fingerprint by adopting a second parameter combination. The second fingerprint image is collected again by adopting the preferred parameter combination in the configuration table, and all the parameter combinations do not need to be polled, so that the processing efficiency of the fingerprint detection device is improved, and the quality effect of the fingerprint image is ensured.

Description

technical field [0001] The present application relates to the technical field of fingerprint sensors, and more particularly, to a fingerprint detection method, a fingerprint detection device and a mobile terminal. Background technique [0002] A fingerprint sensor is a sensor device for imaging fingerprints, and has been widely used in access control systems, attendance systems, and mobile terminals such as mobile phones and tablet computers to verify the identity of users. Fingerprint sensors include optical sensors and capacitive sensors. Optical fingerprint sensors include optical scanning elements for capturing an optical image of the fingerprint. The capacitive fingerprint sensor acquires the capacitance characteristics of each local position of the effective area of ​​the finger, so as to form a fingerprint image by using the variation of capacitance. The signal acquisition and processing circuit of the optical fingerprint sensor is separated from the finger, so it h...

Claims

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Application Information

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IPC IPC(8): G06K9/00
CPCG06V40/1306
Inventor 王长海
Owner CHIPONE TECH BEIJINGCO LTD
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