Displaying substrate, manufacturing method thereof, and display panel

Patent metadata

Field	Value
Publication number	US-11968901-B2
Application number	US-202117432433-A
Country	US
Kind code	B2
Filing date	Feb 23, 2021
Priority date	Mar 30, 2020
Publication date	Apr 23, 2024
Grant date	Apr 23, 2024

Abstract

The disclosure provides a displaying substrate, a manufacturing method thereof, and a display panel, and relates to the technical field of display. The displaying substrate comprises a first supporting base ( 1 ), plurality of vibrating element modules ( 2 ), and a display module ( 3 ). The display module ( 3 ) comprises display units ( 31 ), connecting units ( 32 ) and hollowed-out units ( 33 ). Each connecting unit ( 32 ) is located between two adjacent display units ( 31 ). Each hollowed-out unit ( 33 ) is located between two adjacent display units ( 31 ) except an area where the corresponding connecting unit ( 32 ) is located. The hollowed-out units ( 33 ) are provided with cavities ( 40 ) corresponding to the vibrating element modules ( 2 ). Orthographic projections of the hollowed-out units ( 33 ) on a reference plane cover orthographic projections of the vibrating element modules ( 2 ) on the reference plane. The vibrating element modules ( 2 ) and the cavities ( 40 ) form a transducer.

First claim

The invention claimed is:

1. A displaying substrate, wherein the displaying substrate is provided with a display area,
the display substrate comprises a first supporting base, a plurality of vibrating element modules and a display module, wherein the plurality of vibrating element modules and the display module are respectively disposed on two opposite sides of the first supporting base;
the display module and the plurality of vibrating element modules are located in the display area;
the display module comprises: a plurality of display units that are disposed in an array, a plurality of connecting units, and a plurality of hollowed-out units;
each display unit comprises at least one sub-pixel; each connecting unit is located between two adjacent display units and connects to the two adjacent display units; and each hollowed-out unit is located between two adjacent display units except an area where the corresponding connecting unit is located;
the hollowed-out units are provided with cavities corresponding to the vibrating element modules, and the cavities penetrate through the first supporting base; orthographic projections of the hollowed-out units on a reference plane cover orthographic projections of the vibrating element modules on the reference plane, and the reference plane is parallel to the first supporting base; and
the vibrating element modules and the cavities form a transducer, the vibrating element modules are configured to convert electric signals into acoustic signals, and the cavities are configured to propagate the acoustic signals.

2. The displaying substrate according to claim 1 , wherein each vibrating element module comprises: a second supporting base, a first electrode, a piezoelectric layer and a second electrode of the second supporting base are sequentially disposed away from a side of the first supporting base;
the piezoelectric layer is configured to vibrate mechanically under the effect of an electric field to generate ultrasonic waves; and
the cavities are configured to propagate the ultrasonic waves.

3. The displaying substrate according to claim 2 , wherein the cavities are disposed in a display side of the first supporting base, a positive electrode is applied to the first electrode, and the second electrode is grounded, so that the piezoelectric layer vibrates towards the display side.

4. The displaying substrate according to claim 2 , wherein the first electrodes in the vibrating element modules are not connected with each other, and the second electrodes in the vibrating element modules are connected with each other.

5. The displaying substrate according to claim 4 , further comprising a plurality of connecting electrodes are disposed on a same layer as the second electrodes, and the second electrodes of the vibrating element modules are connected throughout the plurality of connecting electrodes.

6. The displaying substrate according to claim 2 , wherein the first electrode comprises at least one sub-electrode, and the second electrode comprises a planar electrode.

7. The displaying substrate according to claim 6 , wherein the first electrode comprises plurality of said first sub-electrodes that are not connected with each other.

8. The displaying substrate according to claim 2 , wherein the piezoelectric layer is made of an organic piezoelectric material.

9. The displaying substrate according to claim 2 , wherein the displaying substrate further comprising a bonding layer located between the first supporting base and the second supporting base.

10. The displaying substrate according to claim 2 , wherein the displaying substrate further comprising a circuit module and a non-display area, the circuit module is located in the non-display area and is configured to input different electric signals to the first electrode and the second electrode.

11. The displaying substrate according to claim 1 , wherein the sub-pixel comprising a source and a drain, and each connecting unit comprising a connecting line, and it is disposed on a same layer as the source and the drain.

12. The displaying substrate according to claim 11 , wherein the sub-pixel further comprising: a first barrier part, a buffer layer, a display area, a gate insulating layer, a gate and an interlayer dielectric layer are sequentially disposed between the source and the drain.

13. The displaying substrate according to claim 12 , wherein the connecting unit further comprising: a second barrier part and a first organic layer are sequentially disposed between the connecting line and the first supporting base, and the first barrier part and the second barrier part are disposed on a same layer.

14. The displaying substrate according to claim 11 , wherein the sub-pixel further comprising: a pixel defining layer, an emitting layer and a first packaging part are sequentially disposed on a side away from the first supporting base of the source and the drain.

15. The displaying substrate according to claim 14 , wherein the connecting unit further comprising: a second organic layer and a second packaging part are sequentially disposed on a side away from the first supporting base of the connecting line, and the first packaging part and the second packaging part are disposed on a same layer.

16. The displaying substrate according to claim 14 , wherein the emitting unit comprising an anode, an emitting layer and a cathode;
the displaying substrate further comprising a post spacer and a post spacer cover.

17. A display panel, wherein the display panel comprising: a packaging substrate, the displaying substrate according to claim 1 , and a bonding unit located between the packaging substrate and the displaying substrate.

18. A manufacturing method of the displaying substrate according to claim 1 , comprising:
forming a display module on a first supporting base, wherein the display module comprising: the plurality of display units arranged in an array, the plurality of connecting units and the plurality of hollowed-out units;
forming the plurality of vibrating element modules on a second supporting base; and
bonding a side away from the vibrating element modules of the second supporting base formed with the plurality of vibrating element modules on a side away from the display module of the first supporting base formed with the display module.

19. The manufacturing method according to claim 18 , wherein forming the plurality of vibrating element modules on a second supporting base comprises:
forming a first electrode layer, wherein the first electrode layer comprises the plurality of first electrodes that are not connected with each other, and each said first electrode comprises at least one first sub-electrode;
forming a piezoelectric layer covering the first electrode layer; and
forming a second electrode layer covering the piezoelectric layer, wherein the second electrode layer comprising a plurality of second electrodes and a plurality of connecting electrodes.

20. The manufacturing method according to claim 18 , wherein forming a display module on a first supporting base comprises:
sequentially forming a barrier layer, a buffer layer, a display area, a gate insulating layer, a gate and an interlayer dielectric layer on the first supporting base;
removing the buffer layer, the gate insulating layer and the interlayer dielectric layer located in areas of the connecting units and the hollowed-out units by etching;
removing the first supporting base located in the areas of the hollowed-out units by etching;
filling in the

Assignees

• Boe Technology Group Co Ltd

Inventors

• Cui Zhao
• Zhang Feng
• Lv Zhijun
• Liu Wenqu
• Dong Liwen
• Song Xiaoxin
• Meng Detian
• Wang Libo
• Hou Dongfei
• Yao Qi

Classifications

• H10D86/60

  wherein the TFTs are in active matrices · CPC title

• H10D86/481

  integrated with passive devices, e.g. auxiliary capacitors · CPC title

• H10N30/20 Primary

  with electrical input and mechanical output, e.g. functioning as actuators or vibrators · CPC title

• H10K59/1201

  Manufacture or treatment · CPC title

• H10K59/122

  Pixel-defining structures or layers, e.g. banks · CPC title