A Novel Fingerprint Sensing Technology Based on Electrostatic.pptx - A NOVEL FINGERPRINT SENSING TECHNOLOGY BASED ON ELECTROSTATIC IMAGING INTRODUCTION

A Novel Fingerprint Sensing Technology Based on Electrostatic.pptx

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A NOVEL FINGERPRINT SENSING TECHNOLOGY BASED ON ELECTROSTATIC IMAGING
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INTRODUCTION When use of internet and mobile technology got increased, biometric personal based personal identification technology provided its own benefits Facial recognition, fingerprint recognition and iris recogniation commonly used biometric techonlogies Pressure, optical temperature, capacitive and acoustic methods are highly used for finger print recognition Fingerprint image is captured by optical fingerprint sensor with the help of lens and penetrates thick glass
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CONT.… Pressure fingerprint sensor use piezoelectric effect, ridge only gets in contact with sensor unit when a finger is placed on surface Principle of ultrasound is used by ultrasonic fingerprint sensor for creating visualisation 250 μm is common detection distance of capacitive commercial fingerprint sensor It has been increased to 300 μm from researchers For increasing quality of dedection electrostatic detection is introduced which have been used in electrostatic protection and lightning warnings etc only
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ELECTROSTATIC FIELD DISTRIBUTION OF FINGERPRINTS Electrostatic gets charged when human body gets moved and static charge focus on tip (Finger) of human body For formation of non uniform electric field distribution, ridges and depressed valleys are raised when finger gets closed to screen
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  • Spring '13

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