Capacitive fingerprint identification module and electronic equipment
A fingerprint recognition module, capacitive technology, applied in character and pattern recognition, electrical digital data processing, instruments, etc., can solve the problems of poor environmental adaptability of fingerprint recognition modules, achieve excellent sensing sensitivity, and improve sensing sensitivity Effect
Active Publication Date: 2020-09-08
成都芯曌科技有限公司
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Problems solved by technology
[0004] In order to overcome the shortcomings of poor environmental adaptability of existing fingerprint identification modules, the present invention provides a capacitive fingerprint identification module and electronic equipment
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[0019] In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention will be further described in detail below in conjunction with the accompanying drawings and implementation examples. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.
[0020] see figure 1 , the first embodiment of the present invention provides a capacitive fingerprint identification module 1 for identifying fingerprints of fingers, and the capacitive fingerprint identification module 1 includes a dielectric layer 10 and a sensing layer 20 . The dielectric layer 10 is a piezoelectric material layer, and the sensing layer 20 includes electrode elements (not shown) stacked with the dielectric layer 10; When the finger is turned sideways, a capacitance is formed between the finger and the electrode element (not shown) or the finger causes a change ...
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Abstract
The invention provides a capacitance type fingerprint identifying module which is intended for identifying a finger's fingerprint. The module herein includes a dielectric layer and a sensing layer. The dielectric layer is a piezoelectric material layer. The sensing layer includes an electrode component which is in lamination with the dielectric layer. When the finger is applied to one side of thedielectric layer distant from the sensing layer, the finger and the electrode component form a capacitance or the finger causes the capacitance that is formed among electrode components to have changes so as to acquire the finger's fingerprint information. Since the dielectric layer is a piezoelectric material layer which often has a greater dielectric constant, the dielectric layer can effectively increase the sensing sensitivity in identifying the capacitance fingerprint. The invention also provides an electronic device which is advantaged by high sensing sensitivity in identifying fingerprints.
Description
【Technical field】 [0001] The invention relates to the technical field of fingerprint identification, in particular to a capacitive fingerprint identification module and electronic equipment. 【Background technique】 [0002] With the development of fingerprint identification technology, it is widely used in electronic products, such as mobile phones, tablet computers, and access control systems, to simplify operations such as unlocking or transaction payment, which has the advantages of fast operation and high security. [0003] At present, fingerprint recognition technology includes optical fingerprint recognition, capacitive fingerprint recognition and ultrasonic fingerprint recognition, among which capacitive fingerprint recognition has the advantages of low cost and small size, and is the most widely used. However, the sensing sensitivity of the current capacitive fingerprint recognition chip is limited, which cannot meet the needs of users. 【Content of invention】 [00...
Claims
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IPC IPC(8): G06K9/00G06F3/044
Inventor 吴露王开安向勇
Owner 成都芯曌科技有限公司