A fingerprint identification device and method without a metal ring and a touch detection chip

Abstract

The invention discloses a fingerprint identification device without a metal ring and a touch detection chip, and the device comprises a fingerprint sensor which supports a low-power-consumption fingerdetection mode, and is used for collecting fingerprint data; The fingerprint algorithm chip is connected to the fingerprint sensor; The power supply unit is used for providing power; MCU controller:the Fingerprint sensor, The fingerprint algorithm chip and the power supply unit are electrically connected to the MCU controller. The MCU controller is used for controlling the MCU controller to be used for controlling the MCU controller. when the fingerprint sensor detects that a finger touches the fingerprint sensor in a finger detection mode, the output end of the power supply unit is connected with the power supply end of the fingerprint algorithm chip, so that the fingerprint algorithm chip is powered on, and fingerprint data collected by the fingerprint sensor are processed. A metal ring and a touch detection chip are not needed, and the finger detection function and the low-power-consumption standby requirement can be met.

Description

Technical field [0001] The invention relates to a fingerprint touch chip, in particular to a fingerprint identification device and method without a metal ring and a touch detection chip. Background technique [0002] In the prior art, fingerprint identification devices have begun to be widely used in various access control security smart locks, fingerprint identification electronic padlocks, etc., which can use the fingerprint characteristics of the human body to identify personal identity. Among all biometric identification technologies, fingerprint identification technology is Currently the most mature and widely used biometric technology. Among the types of fingerprint sensors, capacitive fingerprint sensors are widely used in fingerprint locks and various intelligent embedded devices due to their small size. According to the application scenarios of the embedded fingerprint identification system, the fingerprint sensor chip in the mainstream fingerprint locks on the market i...

AI Technical Summary

Problems solved by technology

Since the structural casing of many fingerprint locks on the market currently uses conductive metal alloy materials, it is often necessary to ground the system casing in applications. The metal ring here is particularly abrupt in the structure of the fingerprint lock and cannot be connected. Contact or connect to the metal shell, otherwise it will cause the sensing electrode of the touch chip to be short-circuited to the system ground and thus cannot play the role of detecting fingers, so the design will be limited; in the metal structure close to the shell, the metal ring and the fingerprint lock The shell structure needs to be insulated and isolated, and the use of modified touch detection chips and metal rings increases user costs

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