A fingerprint identification module, its fingerprint identification method, and a display device
A fingerprint recognition module and display device technology, which is applied in the acquisition/organization of fingerprints/palmprints, character and pattern recognition, print image acquisition, etc., can solve problems such as affecting the quality of fingerprint recognition and low ultrasonic energy, and improve accuracy , Guaranteed quality effect
Active Publication Date: 2021-04-20
BOE TECH GRP CO LTD
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[0004] The object of the present invention is to provide a fingerprint recognition module and its fingerprint recognition method and display device, which are used to solve the problem that the energy of the emitted and received ultrasonic waves is low when using ultrasonic fingerprint recognition technology to carry out fingerprint recognition, which affects the quality of fingerprint recognition. The problem
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[0054] In order to further illustrate the fingerprint identification module, its fingerprint identification method, and the display device provided by the embodiments of the present invention, a detailed description will be given below in conjunction with the accompanying drawings.
[0055] In the related art, the ultrasonic transmitting / receiving structure mainly includes: an upper electrode and a lower electrode arranged oppositely, and a piezoelectric material layer located between the upper electrode and the lower electrode.
[0056] Such as figure 1As shown, the principle of ultrasonic emission is: connect the upper electrode 10 and the lower electrode 11 to the voltage source 13 respectively, and apply an AC voltage between the upper electrode 10 and the lower electrode 11. Exemplarily, an AC square wave voltage can be applied. Thus, an alternating electric field is generated between the upper electrode 10 and the lower electrode 11, and under the action of the alternati...
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The invention discloses a fingerprint identification module, its fingerprint identification method, and a display device, and relates to the technical field of fingerprint identification, in order to solve the problem that the energy of the emitted and received ultrasonic waves is low when the ultrasonic fingerprint identification technology is used for fingerprint identification, which affects fingerprint identification quality issues. The fingerprint recognition module includes: a transmitting electrode layer and a receiving electrode layer arranged oppositely, and a piezoelectric material layer arranged between the transmitting electrode layer and the receiving electrode layer, and also includes: a compensation electrode layer disposed opposite to each other; and a compensation piezoelectric material layer disposed between the emitter electrode layer and the compensation electrode layer, and a compensation emission region is formed between the compensation electrode layer and the emitter electrode layer. The fingerprint identification module provided by the invention is used for fingerprint identification.
Description
technical field [0001] The invention relates to the technical field of fingerprint identification, in particular to a fingerprint identification module, a fingerprint identification method, and a display device. Background technique [0002] With the continuous development of display technologies, the application range of display panels with fingerprint recognition functions is becoming wider and wider. At present, fingerprint recognition display panels generally use ultrasonic fingerprint recognition technology to realize the function of fingerprint recognition. Through this technology to realize the fingerprint recognition function, the recognition structure is not affected by the cleanliness of the touch fingerprint, and the ultrasonic waves generated during the fingerprint recognition process can be Through various types of materials, the accuracy of fingerprint recognition is not affected by the material of the applied product, which is more conducive to improving the a...
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IPC IPC(8): G06K9/00
CPCG06V40/1306
Inventor 刘英明王海生丁小梁王雷王鹏鹏韩艳玲姬雅倩杨锦李昌峰李佩笑
Owner BOE TECH GRP CO LTD