Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Fingerprint detecting apparatus canceling offset and control method thereof

A technology for fingerprint detection and adjustment, which is applied in the acquisition/organization of fingerprints/palmprints, instruments, characters and pattern recognition, etc. It can solve the problem of the degradation of fingerprint image quality, different voltage values, and difficulty in judging the valley line of the sensor pad 20 fingers. Or ridges and other issues, to achieve the effect of improving the fingerprint recognition rate

Inactive Publication Date: 2016-04-27
KOREA KETAI HI TECH CO LTD +1
View PDF13 Cites 14 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In the conventional fingerprint detection device, even when the fingerprint of the same finger comes into contact with the sensor pad 20, there is a shift in the fingerprint recognition element that constitutes the basic unit of the fingerprint recognition sensor, or in each sensor pad 20. The offsets that occur will also be different, so the obtained voltage values ​​​​are different, which will eventually lead to a decrease in the quality of the obtained fingerprint image
[0008] Specifically, the response signal obtained by the sample-and-hold section 50 from the sensor circuit 40 includes the offsets generated by the respective sensor pads 20, so the offsets are recorded in the programmable gain amplifier (PGA) If zoomed in, it is difficult to judge whether the contact part on the sensor pad 20 is the valley line or the ridge line of the finger.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Fingerprint detecting apparatus canceling offset and control method thereof
  • Fingerprint detecting apparatus canceling offset and control method thereof
  • Fingerprint detecting apparatus canceling offset and control method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0053] Hereinafter, the present invention will be described with reference to the drawings. However, since the present invention can be realized in various forms, it is not limited to the examples described in this specification. In addition, in order to more clearly describe the present invention in the drawings, parts that are not relevant to the description are omitted, and similar reference numerals are attached to similar parts throughout the specification.

[0054] Throughout the specification, when it is mentioned that a certain part is "connected" to other parts, it includes not only the case of "direct connection", but also the case of "indirect connection" with other parts interposed therebetween. And when it is mentioned that a certain part "comprises" a certain constituent element, in the absence of a statement to the contrary, other constituents are not excluded and it is meant that other constituent elements may be included.

[0055] Hereinafter, embodiments of ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

According to an embodiment of the present invention, an apparatus for detecting a fingerprint is provided, which includes a plurality of sensor pads receiving a response signal from a finger applied to a driving signal, a sensing circuit outputting a sensing signal based on the response signal, and a sensing signal adjusting unit sampling the sensing signal outputted from the sensing circuit maintaining the sensing signal, and adjusting an average voltage level of the sensing signal based on a reference voltage.

Description

technical field [0001] The present invention relates to a fingerprint detection device and a driving method thereof, and more particularly to a method for obtaining a fingerprint of a predetermined quality by eliminating offsets of different degrees generated according to the operating state of the fingerprint detection device or according to each sensor pad constituting the fingerprint detection device. Image fingerprint detection device. Background technique [0002] Everyone's fingerprints are different, so fingerprints are widely used in the field of identification. Especially in many fields such as finance, criminal investigation, security, etc., fingerprints are widely used as identity authentication means. [0003] In order to identify such fingerprints to distinguish identities, fingerprint detection devices have been developed. The fingerprint detection device is a device that identifies the fingerprint of a finger through contact with a person's finger, and is wi...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): G06K9/00G06V30/144
CPCG06V40/1306
Inventor 许主日金俊式金东昊金泽武郑成益
Owner KOREA KETAI HI TECH CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com