Fingerprint sensing device and electronic device

Abstract

The invention discloses a fingerprint sensing device. The fingerprint sensing device includes a first unit including multiple switch tubes, multiple second units which are arranged on the first unit and are used for providing induction signals, multiple third units used for providing detection signals according to the induction signals, and multiple fourth units which are connected between the corresponding second units and the corresponding third units and are used for providing release paths of static charges and conduction paths of the induction signals, wherein each fourth unit includes atleast one static protection element, and a parasitic diode of at least one of the multiple switch tubes provides at least one of the static protection elements. The fingerprint sensing device is advantaged in that the parasitic diodes of the switch tubes are utilized to form at least one of the static protection elements, the occupation land of a circuit is reduced, the multiple fourth units canbe corresponding connected with the multiple second units, and static protection capability is improved.

Description

technical field [0001] The invention relates to the technical field of integrated circuits, and more specifically, to a fingerprint sensing device and electronic equipment. Background technique [0002] The prior art fingerprint sensing device has a plurality of second units. When a user places a finger on the surface of the fingerprint sensing device, the variation of the capacitance of the second units is used to determine the pattern of the fingerprint. [0003] figure 1 A schematic diagram of a fingerprint sensing device according to the prior art is shown. Such as figure 1 As shown, the fingerprint sensing device 100 includes a first unit 110 , a second unit 120 located on the first unit 110 , and a protective layer 130 covering the second unit 120 . A third unit 140 connected to the second unit 120 is formed on the first unit 110, and the second unit 120 includes a plurality of second units 120 arranged in a matrix. When the finger 150 touches or approaches the pro...

AI Technical Summary

Problems solved by technology

The voltage difference between the two ends of the above-mentioned electric field increases with the increase of ESD energy. When the voltage difference is greater than the gate breakdown voltage of the semiconductor element, it will cause damage or damage to the semiconductor element, resulting in reduced performance or functional failure of the fingerprint sensor device.

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