Title:
ELECTRICALLY-CONDUCTIVE FOAM, ULTRASONIC FINGERPRINT MODULE, DISPLAY SCREEN ASSEMBLY, AND ELECTRONIC APPARATUS
Document Type and Number:
WIPO Patent Application WO/2021/175101
Kind Code:
A1
Abstract:
The present invention relates to an electrically-conductive foam, an ultrasonic fingerprint module, a display screen assembly, and an electronic apparatus. The electrically-conductive foam comprises the following uniformly mixed components in percentage by mass: 1.5%-2.5% of a carbon powder; 3%-5% of a copper powder; 3%-5% of a nickel powder; the remainder being a resin, wherein the carbon powder particle size is less than or equal to 0.005 mm, the copper powder particle size is less than or equal to 0.01 mm, and the nickel powder particle size is less than or equal to 0.01 mm. The electrically-conductive foam of the present invention can be used to form a shielding layer attachable to a substrate of an ultrasonic fingerprint module. When the ultrasonic fingerprint module is in an operating state, the shielding layer can reflect an ultrasound wave emitted by a piezoelectric layer toward one side at which the substrate is located. The reflected ultrasound wave resonates with an ultrasound wave emitted by the piezoelectric layer toward one side at which an electrode layer is located so as to increase the signal strength of an ultrasound wave used to capture a fingerprint image, thereby obtaining a clear captured fingerprint image. In addition, the shielding layer has favorable electromagnetic shielding performance, thereby providing protection against EMI.
Inventors:
LIU XUANXUAN (CN)
Application Number:
PCT/CN2021/075723
Publication Date:
September 10, 2021
Filing Date:
February 07, 2021
Export Citation:
Assignee:
OFILM GROUP CO LTD (CN)
JIANGXI OUMAISI MICROELECTRONICS CO LTD (CN)
JIANGXI OUMAISI MICROELECTRONICS CO LTD (CN)
International Classes:
C08K3/04; H05K9/00; C08K3/08; C08L33/04; C08L75/04; G06K9/00
Foreign References:
| CN111417295A | 2020-07-14 | |||
| CN1620845A | 2005-05-25 | |||
| CN105451527A | 2016-03-30 | |||
| CN109491552A | 2019-03-19 | |||
| CN203582791U | 2014-05-07 | |||
| CN107216476A | 2017-09-29 |
Attorney, Agent or Firm:
ADVANCE CHINA IP LAW OFFICE (CN)
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