Sound generating panel and method for manufacturing the same, display device with screen generating sound

Patent metadata

Field	Value
Publication number	US-12389165-B2
Application number	US-202117913510-A
Country	US
Kind code	B2
Filing date	Sep 13, 2021
Priority date	Sep 13, 2021
Publication date	Aug 12, 2025
Grant date	Aug 12, 2025

Abstract

A sound generating panel, a display device with a screen generating sound and a method for manufacturing a sound generating panel are provided. The sound generating panel includes sound generating unit groups, each of which includes sound generating units. Each sound generating unit includes a support layer with openings and two piezoelectric structures resonating through a cavity, improving a sound pressure generated by the sound generating panel. Each sound generating unit group includes sound generating units with different radii, thereby realizing sound generating at different frequencies, and improving a sound effect of the sound generating panel. Each of some sound generating unit groups includes ultrasonic detection units for detecting a distance between a listener and the sound generating panel, so that an effect of automatically regulating and controlling a volume of sound is realized. In the display device, the sound generating panel is on a display side of a display panel, so that sound waves can directly enter human ears. The sound generating panel provided by the present disclosure is capable of automatically regulating and controlling the volume of sound and having a vivid sound effect, and the sound generating panel is integrated to the display panel, improving a level of integration of a screen.

First claim

What is claimed is:

1. A sound generating panel, comprising at least one sound generator unit group,
wherein each of the at least one sound generator group comprises at least one sound generator, each of the at least one sound generator comprises a support layer, a first piezoelectric structure and a second piezoelectric structure; the first piezoelectric structure and the second piezoelectric structure are on opposite sides of the support layer, respectively;
the support layer comprises openings, and orthographic projections of the first piezoelectric structure and the second piezoelectric structure on a plane where the support layer is located partially overlaps an orthographic projection of the opening, corresponding to the first piezoelectric structure and the second piezoelectric structure, on the plane;
the first piezoelectric structure comprises a first electrode on the support layer, a first piezoelectric material layer on a side of the first electrode away from the support layer, and a second electrode on a side of the first piezoelectric material layer away from the first electrode; and
the second piezoelectric structure comprises a third electrode on a side of the support layer away from the first piezoelectric structure, a second piezoelectric material layer on a side of the third electrode away from the support layer and a fourth electrode on a side of the second piezoelectric material layer away from the third electrode,
the sound generating panel further comprises an encapsulation layer comprising a first encapsulation layer on a side of the second electrode away from the first piezoelectric material layer and a second encapsulation layer on a side of the fourth electrode away from the second piezoelectric material layer,
wherein an orthographic projection of each first sound generator on the encapsulation layer is greater than an orthographic projection of each second sound generator on the encapsulation layer, and the orthographic projection of each second sound generator on the encapsulation layer is greater than an orthographic projection of each third sound generator on the encapsulation layer.

2. The sound generating panel according to claim 1 , wherein the orthographic projection of the first piezoelectric structure on the plane where the support layer is located overlaps the orthographic projection of the opening, corresponding to the first piezoelectric structure, on the plane,
and/or the orthographic projection of the second piezoelectric structure on the plane where the support layer is located overlaps the orthographic projection of the opening, corresponding to the second piezoelectric structure, on the plane.

3. The sound generating panel according to claim 2 , further comprising a first insulating layer between the second electrode and the first piezoelectric material layer, and a second insulating layer between the fourth electrode and the second piezoelectric material layer.

4. The sound generating panel according to claim 3 , wherein each of the at least one sound generator is configured to emit sound waves having a frequency in a range from about 20 Hz to about 20000 Hz.

5. The sound generating panel according to claim 4 , wherein each of the at least one sound generator unit group comprises at least one first sound generator and at least one second sound generator, the at least one first sound generator is configured to emit sound waves having a first frequency; and the at least one second sound generator is configured to emit sound waves having a second frequency; the first frequency and the second frequency are in different frequency ranges respectively.

6. The sound generating panel according to claim 5 , wherein each of the at least one sound generator group comprises a plurality of first sound generators arranged along a first direction and a plurality of second sound generators arranged along the first direction, and each first sound generator is adjacent to the second sound generator, corresponding to said each first sound generator, in a second direction; the first direction and the second direction intersect with each other.

7. The sound generating panel according to claim 5 , wherein each of the at least one sound generator group further comprises at least one third sound generator configured to emit sound waves having a third frequency, and the first frequency is in a range from 20 Hz to 500 Hz, the second frequency is in a range from 500 Hz to 2000 Hz, and the third frequency is in a range from 2000 Hz to 20000 Hz.

8. The sound generating panel according to claim 1 , wherein the at least one sound generator group comprises at least one ultrasonic detector configured to transmit and receive sound waves having a frequency of above 20000 Hz; each of the at least one ultrasonic detector comprises a receiving electrode in the same layer as the second electrode, a transmitting electrode in the same layer as the fourth electrode, a third piezoelectric material layer in the same layer and made of the same material as the first piezoelectric material layer, a fourth piezoelectric material layer in the same layer and made of the same material as the second piezoelectric material layer, and an ultrasonic support layer in the same layer as the support layer.

9. The sound generating panel according to claim 8 , further comprising a third insulating layer between the third piezoelectric material layer and the receiving electrode, and a fourth insulating layer between the fourth piezoelectric material layer and the transmitting electrode.

10. The sound generating panel according to claim 9 , wherein an orthographic projection of each ultrasonic detector on the plane where the support layer is located is smaller than an orthographic projection of each sound generator on the encapsulation layer.

11. The sound generating panel according to claim 1 , further comprising a first adhesive layer between the support layer and the first electrode, and a second adhesive layer between the support layer and the third electrode, wherein each of the first adhesive layer and the second adhesive layer is made of an optically clear adhesive.

12. The sound generating panel according to claim 11 , further comprising a first flexible layer between the first adhesive layer and the first electrode, and a second flexible layer between the second adhesive layer and the third electrode, wherein each of the first flexible layer and the second flexible layer is made of a polyimide resin.

13. A display device with a screen generating sound, comprising a display panel and the sound generating panel according to claim 1 .

14. The display device according to claim 13 , wherein the display panel comprises a display region and a peripheral region, a plurality of pixel arranged in an array are provided in the display region; an orthographic projection of each sound generator group on the display panel covers at least one pixel.

15. The display device according to claim 14 , wherein an orthographic projection of each ultrasonic detector on the display panel partially overlaps the peripheral region.

16. The display device according to claim 14 , wherein an orthographic projection of each ultrasonic detector on the display panel covers at least one pixel.

17. A sound generating panel, comprising at least one sound generator group,
wherein each of the at least one sound generator group comprises at least one sound generator, each of the at least one sound generator comprises a support layer, a first piezoelectric structure and a second piezoelectric structure; the first piezoelectric structure an

Assignees

• Boe Technology Group Co Ltd

Inventors

• Cui Zhao
• Zhang Feng
• Liu Wenqu
• Lv Zhijun
• Dong Liwen
• Meng Detian
• Wang Libo
• Hou Dongfei
• Huang Haitao
• Li Liuqing
• Yao Qi

Classifications

• H04R2499/15

  Transducers incorporated in visual displaying devices, e.g. televisions, computer displays, laptops · CPC title

• H10N30/852

  Composite materials, e.g. having 1-3 or 2-2 type connectivity · CPC title

• H10N30/883

  Additional insulation means preventing electrical, physical or chemical damage, e.g. protective coatings · CPC title

• H10N30/081 Primary

  by coating or depositing using masks, e.g. lift-off · CPC title

• H04R3/12

  for distributing signals to two or more loudspeakers {(specially adapted for hearing aids H04R25/407)} · CPC title