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Ultrasonic module and display screen

A display and ultrasonic technology, applied in character and pattern recognition, fluids using vibration, instruments, etc., can solve problems such as low ultrasonic conversion rate

Active Publication Date: 2019-09-24
BOE TECH GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention at least partly solves the problem of low ultrasonic conversion rate of existing ultrasonic modules, and provides an ultrasonic module with high ultrasonic conversion rate

Method used

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  • Ultrasonic module and display screen
  • Ultrasonic module and display screen
  • Ultrasonic module and display screen

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Such as figure 2 , Figure 3a , Figure 3b as well as Figure 3c As shown, the present embodiment provides an ultrasonic module 10, including:

[0030] Piezoelectric material layer 13;

[0031] The first electrode unit 11 is arranged on one side of the piezoelectric material layer 13;

[0032] The second electrode unit 12 is arranged on the side of the piezoelectric material layer 13 away from the first electrode unit 11, the second electrode unit 12 includes a plurality of first sub-electrode layers 121 and a first conductive elastic material 123 spaced apart from each other, the first The conductive elastic material 123 is located at least in a partial area between the first sub-electrode layer 121 and the piezoelectric material layer 13 .

[0033] Wherein, that is to say, the structure of the ultrasonic module 10 is sequentially the first electrode unit 11 , the piezoelectric material layer 13 , the first conductive elastic material 123 and the first sub-electr...

Embodiment 2

[0050] Such as figure 2 , Figure 3a , Figure 3b as well as Figure 3c As shown, this embodiment provides a display screen, including:

[0051] the first substrate 21;

[0052] A second substrate 22 that is boxed with the first substrate 21;

[0053] In the ultrasonic module 10 in Embodiment 1, the ultrasonic module 10 is arranged on the first substrate 21 and

[0054] Between the second substrates 22 , the first substrate 21 is located on a side of the first electrode unit 11 away from the second electrode unit 12 , and the second substrate 22 is located on a side of the second electrode unit 12 away from the first electrode unit 11 .

[0055] Wherein, since at least one side of the piezoelectric material layer 13 of the ultrasonic module 10 is provided with a conductive elastic material, even if the ultrasonic module 10 is arranged between the rigid first substrate 21 and the second substrate 22, the piezoelectric material layer 13 Larger deformation can occur, there...

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Abstract

The invention provides an ultrasonic module and a display screen, and belongs to the technical field of display, which can at least partially solve the problem of low ultrasonic conversion rate of an existing ultrasonic module. The ultrasonic module comprises a piezoelectric material layer; a first electrode unit which is arranged on one side of the piezoelectric material layer; a second electrode unit which is arranged on the side, away from the first electrode unit, of the piezoelectric material layer, wherein the second electrode unit comprises a plurality of first sub-electrode layers and first conductive elastic materials, wherein the first sub-electrode layers and the first conductive elastic materials are spaced from one another, and the first conductive elastic materials are located in at least a part of areas between the first sub-electrode layers and the piezoelectric material layer.

Description

technical field [0001] The invention belongs to the field of display technology, and in particular relates to an ultrasonic module and a display screen. Background technique [0002] As the full-screen display has received widespread attention, more and more people have paid attention to the fingerprint recognition technology under the screen. An under-screen fingerprint recognition technology in the prior art uses ultrasonic fingerprint recognition, specifically, as figure 1 As shown, the ultrasound module includes a first electrode 11 , a second electrode 12 and a piezoelectric material layer 13 between the two electrodes. Its working principle is as follows: the voltage between the first electrode 11 and the second electrode 12 is constantly changing, causing the piezoelectric material layer 13 to deform and generate mechanical vibration, thereby emitting ultrasonic waves; when a finger or other things approach or touch the display screen, Ultrasonic waves reflected fro...

Claims

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Application Information

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IPC IPC(8): G06F1/16G06K9/00
CPCG06F1/1643G06V40/1306H10K59/65B06B1/0692B06B1/0207B06B2201/56B06B2201/70G02F1/13338
Inventor 刘英明王海生丁小梁王雷王鹏鹏赵利军李佩笑
Owner BOE TECH GRP CO LTD