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Fingerprint sensor and control method of fingerprint sensor

A fingerprint sensor and fingerprint detection technology, applied in the fields of instruments, computing, electrical digital data processing, etc., can solve the problems of waste of power consumption and high power consumption, and achieve the effect of reducing power consumption, low power consumption and reducing working time.

Active Publication Date: 2019-09-13
BYD SEMICON CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, from the process of entering the waiting fingerprint verification stage to completing the fingerprint detection, the actual fingerprint detection takes very little time, and what is detected most of the time is useless signals, which leads to a large waste of power consumption. The fingerprint detection pixel 2 on the fingerprint detection area 4 consumes a large amount of power

Method used

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  • Fingerprint sensor and control method of fingerprint sensor
  • Fingerprint sensor and control method of fingerprint sensor
  • Fingerprint sensor and control method of fingerprint sensor

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Embodiment Construction

[0018] 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.

[0019] In describing the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", " The orientations or positional relationships indicated by "vertical", "horizontal", "top", "bottom", "inner" and "outer" are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and Simplified descriptions, rather than indicating or implying that the device or element refe...

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Abstract

The invention discloses a fingerprint sensor and a control method for the fingerprint sensor. The fingerprint sensor comprises a fingerprint detection panel, a fingerprint detection region located on the fingerprint detection panel, a conductor layer arranged on the fingerprint detection panel for generating induction capacitance between the conductor layer and a finger when the finger gets close to the fingerprint detection region, a capacitance detection module used for detecting induction capacitance, and a control module used for judging the distance between the finger and each of several fingerprint detection units according to the induction capacitance change trend and controlling the fingerprint detection units to start working to scan the fingerprint when the distance is smaller than a preset value, wherein the fingerprint detection units are arranged in the fingerprint detection region. The fingerprint sensor has advantages of low power consumption and energy saving.

Description

technical field [0001] The invention relates to identity recognition control technology, in particular to a fingerprint sensor and a control method for the fingerprint sensor. Background technique [0002] Semiconductor fingerprint sensors are widely used in the field of identification. Semiconductor fingerprint sensors usually perform fingerprint detection based on the capacitance formed between the finger surface and the fingerprint detection panel. Such as figure 1 As shown, an existing fingerprint sensor 1 is shown, wherein the fingerprint detection pixel point 2 completes the detection of a single fingerprint pixel point, the fingerprint sensor frame 3 is usually used to transmit an excitation signal to the finger 5, and the fingerprint detection area 4 is arranged Full of fingerprint detection pixels 2. When the fingerprint sensor 1 is in the normal working mode, the detection pixels 2 distributed on the fingerprint detection area 4 scan the surface of the fingerpri...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06K9/00G06F1/3206
Inventor 张自宝张杰杨云
Owner BYD SEMICON CO LTD