An electronic device, fingerprint detection device and method
A fingerprint detection and fingerprint technology, which is applied in measuring devices, data processing power supplies, liquid/fluid solid measurement, etc., can solve the problems of high cost, low detection efficiency and response sensitivity of the fingerprint detection system, and achieve improved detection efficiency and response sensitivity , solve the effect of high cost and improve response speed
Active Publication Date: 2022-05-20
BYD SEMICON CO LTD
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[0006] The object of the present invention is to provide an electronic device, fingerprint detection device and method, aiming at solving the problems of high cost, low detection efficiency and low response sensitivity in the existing fingerprint detection system
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[0095] Further, as a preferred embodiment of the present invention, the fingerprint detection method also includes:
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The invention belongs to the technical field of fingerprint detection and provides an electronic device, a fingerprint detection device and a method. In the present invention, by adopting a fingerprint detection device comprising a main control MCU, a power supply module, a fingerprint detection module, a DSP chip and a sensing module, when the fingerprint detection device is in a dormant mode, the main control MCU controls the power supply module to provide the DSP chip The working voltage is set to the dormant voltage, and at the same time, the function of detecting whether there is a finger touching the fingerprint detection chip is integrated into the fingerprint detection chip itself, which improves the integration of the system and effectively reduces the system cost; in addition, when a finger touches the fingerprint When detecting the chip, the main control MCU controls the power supply module to switch the working voltage provided to the DSP chip from the dormant voltage to the normal power supply voltage. At the same time, the fingerprint detection chip scans the fingerprint image without waiting for the power switch, which effectively improves the response to finger touch Speed, thereby improving the detection efficiency and response sensitivity of the fingerprint detection system.
Description
technical field [0001] The invention belongs to the technical field of fingerprint detection, and in particular relates to an electronic device, a fingerprint detection device and a method. Background technique [0002] With the improvement of people's requirements for equipment security, fingerprint recognition is now widely used in various security equipment. At present, the fingerprint detection systems used in the prior art are mainly as figure 1 As shown, its working principle is: when the system is in sleep mode (the working mode of detecting whether there is a finger touch), the voltage VCC1 output by the power module is zero, the voltage VCC2 is VCC, and the touch chip detects whether there is a finger touch on the metal ring. If a finger touches the metal ring, the fingerprint detection system will switch to the working mode. The operation process of the fingerprint detection system in the working mode is as follows: [0003] The touch chip sends a signal to the m...
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IPC IPC(8): G06V40/13G06F1/26
CPCG06F1/26G06V40/13Y02D30/70
Inventor 张杰郭亮亮黄臣杨云
Owner BYD SEMICON CO LTD