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Finger detection element and detection method for fingerprint sensing integrated circuit

A technology of integrated circuits and detection components, which is applied in the direction of acquiring/arranging fingerprints/palmprints, printing image collection, computer components, etc., and can solve the problems of power consumption, easy power exhaustion, inconvenience, etc.

Active Publication Date: 2015-03-25
IMAGE MATCH DESIGN
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  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, traditional fingerprint identification devices or devices must always be in a standby state to identify the user's identity at any time, which consumes a lot of power, especially for portable fingerprint identification devices, which are easy to run out of power, which is very inconvenient

Method used

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  • Finger detection element and detection method for fingerprint sensing integrated circuit
  • Finger detection element and detection method for fingerprint sensing integrated circuit
  • Finger detection element and detection method for fingerprint sensing integrated circuit

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Embodiment Construction

[0035] Please refer to FIG. 1, FIG. 2 and FIG. 3. FIG. 1 and FIG. 2 are schematic top views of a finger detection element of a fingerprint sensing integrated circuit according to an embodiment of the present invention, and FIG. 3 is a schematic diagram of an embodiment of the present invention. A partial cross-sectional schematic diagram of a fingerprint sensing integrated circuit. The finger detection element 1 of the fingerprint sensing integrated circuit includes a plurality of sensing electrodes 10 , a capacitive sensing layer 20 , a signal processing circuit 30 , a multiplex processing module 40 and a signal temporary storage area 50 . A plurality of sensing electrodes 10 form an array to define a fingerprint sensing area 11 ; the capacitive sensing layer 20 covers the plurality of sensing electrodes 10 . In one embodiment, the capacitive sensing layer 20 is manufactured by depositing silicon oxynitride by deposition method, or is manufactured by alternately stacking depo...

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Abstract

The invention provides a finger detection element and a detection method for a fingerprint sensing integrated circuit. The finger detection element comprises a plurality of sensing electrodes, a capacitance inductive layer, a signal processing circuit, a multiplex processing module, and a signal temporary storage region. The sensing electrodes are used to define a fingerprint sensing region. The capacitance inductive layer covers the plurality of sensing electrodes. The signal processing circuit is disposed below the plurality of sensing electrodes and is electrically connected with the plurality of sensing electrodes. The multiplex processing module is used to define a finger detection region. The finger detection region comprises at least a sensing electrode. The signal temporary storage region is electrically connected with the signal processing circuit, and is used to receive a detection signal generated by the finger detection region and compare the detection signal with a preset value. Through just starting at least a part of sensing electrodes, whether a finger gets close or contact can be detected, so as to start the circuit or come into dormancy, thereby saving electric power.

Description

technical field [0001] The invention relates to a finger detection element and a detection method, in particular to a finger detection element and a detection method of a fingerprint sensing integrated circuit. Background technique [0002] Since human beings have higher requirements for privacy, data security and property security, biometric technology has emerged as the times require. Its main purpose is to screen and confirm the correct identity of the target from many targets. Biometric technology mainly uses the unique physiological characteristics of human beings, including fingerprints, faces, irises, voices and so on. Because the fingerprint identification is easy to detect; moreover, the cost of the instrument is low, so it has a wide range of applications. [0003] Among various fingerprint recognition technologies, capacitive sensing technology has the most prospect. The reason is that the sensing element can be integrated through an integrated circuit chip, and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06K9/00
CPCG06V40/1306
Inventor 王廷熏
Owner IMAGE MATCH DESIGN
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