Fingerprint identification device and fingerprint identification method

A fingerprint identification and fingerprint information technology, applied in the field of communication, can solve the problems of difficulty in implementation and high cost of strained film materials, and achieve the effects of imaging consistency assurance, flexible adjustment, and increased distribution range

Inactive Publication Date: 2014-12-31
SHENZHEN GOODIX TECH CO LTD
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

However, the cost of strained thin film materials is high in process manufacturing, and it is difficult to realize

Method used

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  • Fingerprint identification device and fingerprint identification method
  • Fingerprint identification device and fingerprint identification method
  • Fingerprint identification device and fingerprint identification method

Examples

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no. 1 example

[0068] See Figure 7 , The first embodiment of the fingerprint identification method of the present invention is proposed. The fingerprint identification method includes the following steps:

[0069] Step S101: The fingerprint collection module collects fingerprint information and outputs it to the analog-to-digital conversion module

[0070] The fingerprint acquisition module includes a fingerprint sensor unit, a signal amplifier, and a signal enhancement unit (or noise shaping and signal enhancement unit) connected in sequence. The fingerprint sensor unit collects fingerprint information, and the signal amplifier amplifies the collected fingerprint information to enhance the signal. The unit performs processing such as noise shaping and signal-to-noise ratio improvement on the fingerprint information, and outputs the processed fingerprint information to the analog-to-digital conversion module.

[0071] Step S102: The analog-to-digital conversion module generates a quantized voltage...

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Abstract

The invention discloses a fingerprint identification device and a fingerprint identification method. The fingerprint identification device comprises a fingerprint acquisition module, an analog-to-digital conversion module and a control module which are connected sequentially, the analog-to-digital conversion module comprises a quantified voltage generator for generating quantified voltage, the fingerprint acquisition module is used for acquiring fingerprint information, the analog-to-digital conversion module is used for carrying out analog-to-digital conversion for the fingerprint information and outputting quantified fingerprint information data, and the control module is used for controlling the quantified voltage generator to adjust the output range of quantified voltage according to the distribution range of the fingerprint information data in order to broaden the distribution range of the quantified fingerprint information data. Consequently, with the simple circuit and low cost, the fingerprint identification device realizes the dynamic regulation of fingerprint image contrast. By increasing the analog-to-digital conversion resolution of the fingerprint information, the invention increases the grey information contrast and signal-to-noise ratio of the fingerprint image, thus ultimately increasing the rate of subsequent fingerprint identification.

Description

Technical field [0001] The present invention relates to the field of communication technology, in particular to a fingerprint identification device and method. Background technique [0002] There are differences in the depth of the fingerprint path of a person's hand. The convex places are called "ridges" and the concave places are called "valleys". Capacitive fingerprint identification devices use the principle that the “peaks” and “valleys” contained in the fingerprint correspond to the different inductive capacitances, so the amplitude of the output signal is also different under the same AC signal excitation. The image information is transformed into corresponding electrical signals. [0003] For a capacitive fingerprint identification device that uses a fingerprint sensing unit as the basic unit, the fingerprint sensing unit extracts the capacitive coupling signal of each pixel, and then sends it to other parts of the fingerprint identification device to perform operations su...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06K9/00
CPCG06V40/1306H03K17/962G06V40/1347G06V10/28
Inventor 陈松涛
Owner SHENZHEN GOODIX TECH CO LTD
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