Fingerprint identification device and fingerprint identification method thereof

Abstract

The invention relates to a fingerprint identification device, which comprises a substrate; a sensor located on the substrate, and a plurality of sensing finger touch pads on the periphery of the sensor; an oscillator electrically connected with the plurality of sensing finger touch pads and outputting at least one oscillation frequency signal; a timer used for outputting a clock pulse signal to the oscillator; and a counting and digital comparator used for counting and comparing the oscillation frequency signals. A fingerprint identification method comprises: the oscillator receives the clock pulse signal and outputs the oscillation frequency signal; a finger touches the plurality of sensing finger touch pads; and the oscillation frequency signals and the oscillation frequency signals after touching are counted and compared. The fingerprint identification device is applied to a display surface of an electronic product and is used for sensing whether a finger touches the fingerprint identification device or not.

Description

technical field [0001] The present invention relates to the field of fingerprint identification, in particular to a fingerprint identification device and a fingerprint identification method thereof. Background technique [0002] Biometric technologies, such as fingerprint recognition, voiceprint recognition and retinal recognition, have gradually matured and are widely used in personal identification and confirmation. Since fingerprint feature data requires less storage space than other types of biometric feature data, fingerprint identification has become the mainstream of biometric identification technology. Therefore, many products currently on the market, such as notebook computers, tablet computers, mobile phones, etc., have integrated fingerprint recognition functions to enhance the security of use. [0003] Since the known capacitive fingerprint recognition device needs to be equipped with an additional frame (such as an iron frame) to contact the user's finger to de...

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Problems solved by technology

[0003] Since the known capacitive fingerprint recognition device needs to be equipped with an additional frame (such as an iron frame) to contact the user's finger to determine whether a touch event occurs, if the fingerprint recognition device is to be attached to the display surface of an electronic product , which will reduce the visibility of the display surface, thereby limiting the application of the fingerprint identification device to a specific position of electronic products, and the additional matching of the outer frame also increases the manufacturing cost of the fingerprint identification device

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