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Fingerprint Detecting System and Method

A fingerprint and fingerprint signal technology, applied in the direction of acquiring/organizing fingerprints/palmprints, instruments, characters and pattern recognition, etc., can solve problems such as interference and increased difficulty in fingerprint recognition.

Pending Publication Date: 2021-08-13
NOVATEK MICROELECTRONICS CORP
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  • Summary
  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

In other words, the fingerprint detection operation co-existing with the touch sensing and / or display operation will generate non-negligible interference on the fingerprint signal, which greatly increases the difficulty of fingerprint identification

Method used

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  • Fingerprint Detecting System and Method
  • Fingerprint Detecting System and Method
  • Fingerprint Detecting System and Method

Examples

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Embodiment Construction

[0026] Please refer to figure 2 , figure 2 It is a schematic diagram of a fingerprint detection system 20 . The fingerprint detection system 20 includes a fingerprint module 200 and a signal processing circuit 210 , and the signal processing circuit 210 is coupled to the fingerprint module 200 . The fingerprint module 200 can receive the fingerprint driving signal "Write" to enable the fingerprint detection function, and then perform frequency modulation on the fingerprint driving signal, so as to shift the fingerprint driving signal from the base frequency to a first frequency f1 (such as higher than the base frequency frequency of the frequency), thus avoiding interference in the fundamental frequency range. In addition, the fingerprint module 200 includes a sensor pad (sensor pad) 202, which is used to detect the light reflected from the user's fingerprint, and the fingerprint module 200 uses the received "Write" signal and the signal detected by the sensor pad 202 , g...

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Abstract

Disclosed are a fingerprint detecting system and method. The fingerprint detecting system comprises a fingerprint module, for receiving a fingerprint driving signal and performing a frequency modulation on the fingerprint driving signal, to correspondingly outputting a fingerprint signal with a first frequency based on the fingerprint driving signal; and a signal processing circuit, coupled to the fingerprint module, for receiving the fingerprint signal with the first frequency, performing a frequency demodulation to shift the first frequency of the fingerprint signal to a second frequency, and filtering the fingerprint signal with the second frequency based on the first frequency, whereby the filtered fingerprint signal is used for a fingerprint data analysis.

Description

technical field [0001] The invention relates to a fingerprint detection system, in particular to a fingerprint detection system which can use frequency modulation to remove noise. Background technique [0002] With the advancement of technology, various types of mobile devices, such as smart phones, tablets, laptops, GPS navigator systems and electronic books, etc., It has become an indispensable part of people's life. Different from traditional mobile phones that only have the function of calling, today's mobile devices integrate functions such as communication, networking, photography, games, and data processing. The multi-functional design makes mobile devices more popular among consumers. Fingerprinting is a common feature used to address security and privacy concerns. For example, a mobile phone may have a fingerprint recognition module built into a home button or a specific area (such as a sensor pad) to detect a user's fingerprint. [0003] In recent years, optical...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06K9/40G06K9/00
CPCG06V40/13G06V10/30G06V40/1318G06V40/1347
Inventor 陈弘凯洪挺轩张志远詹丰林
Owner NOVATEK MICROELECTRONICS CORP
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