Fingerprint sensor, fingerprint sensing module and electronic equipment
A sensor and fingerprint technology, which is applied in the direction of acquiring/arranging fingerprints/palmprints, instruments, characters and pattern recognition, etc., can solve the problems of difficult fingerprint recognition, poor sensing effect, and not too far away, so as to improve Touch effect, increase strength, increase effective area effect
Inactive Publication Date: 2018-03-27
FOCALTECH ELECTRONICS
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Problems solved by technology
However, the distance between the fingerprint surface of the finger and the capacitive sensing unit should not be too far. If the distance is too far, the sensing effect will be poor, and it will be difficult to accurately complete fingerprint recognition. That is, when the thickness of the insulating cover increases, the sensing effect will decrease. become worse
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[0031] As mentioned in the background section, when the thickness of the insulating cover increases in the current fingerprint sensor, the sensing effect will be deteriorated.
[0032] Based on this, an embodiment of the present invention provides a fingerprint sensor, including a capacitive sensing unit, the front of the capacitive sensing unit is provided with at least one through hole, groove or boss, and the groove is vertically The projection of the direction is in the opening of the groove, or the projection of the boss in the vertical direction is in the contact surface between the boss and the capacitance sensing unit.
[0033] In addition, the embodiment of the present invention also provides a fingerprint sensor, which includes a first conductive layer arranged on the capacitive sensing unit and a plurality of blocks arranged directly above the first conductive layer and connected to the first conductive layer through a connecting column. The second conductive block ...
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The invention provides a fingerprint sensor. The fingerprint sensor comprises a capacitance sensing unit; at least one through hole and a groove or boss is formed in the front of the capacitance unit;the projection of the groove in the vertical direction is in the opening of the groove; or the projection of the boss in the vertical direction is in a contact surface between the boss and the capacitance sensing unit. The invention furthermore provides a fingerprint sensing module and electronic equipment. The fingerprint sensing module comprises the fingerprint sensor, a packaging body, an insulating cover plate and a circuit board, wherein the packaging body is used for packaging the fingerprint sensor in a cavity; the insulating cover plate is used for covering the packaging body; and a circuit connection end of the fingerprint sensor goes through the packaging body to be connected with the circuit board. Through arranging the through hole and the groove or the boss in the front of the capacitance sensing unit, an existing two-dimensional induced electric field is changed into a three-dimensional induced electric field, so that effective area of the capacitance sensing unit for receiving the electric field is increased and the intensity of the induced electric field is improved.
Description
technical field [0001] The invention relates to the technical field of fingerprint identification, and more specifically, to a fingerprint sensor, a fingerprint sensing module and electronic equipment. Background technique [0002] refer to figure 1 , the fingerprint sensor 100 in the prior art includes a signal processing unit 101 and a capacitive sensing array composed of a plurality of capacitive sensing units 102 . [0003] refer to figure 2 , the fingerprint sensing module in the prior art includes a fingerprint sensor 102, an insulating cover 200, and the insulating cover 200 covers the fingerprint sensor 102 and serves as a finger contact surface. [0004] After the user's finger presses the insulating cover, electric field lines 210 are formed between the fingerprint ridges and valleys of the finger 300 and the capacitance sensing unit 102 of the fingerprint sensor. The size of the capacitance value is used to detect the position of the ridges and valleys of the ...
Claims
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Login to View More IPC IPC(8): G06K9/00
CPCG06V40/1306
Inventor 王运华张凯许丽梅
Owner FOCALTECH ELECTRONICS