Display panel, preparation method for display panel, and display device

Patent metadata

Field	Value
Publication number	US-12598960-B2
Application number	US-202218065874-A
Country	US
Kind code	B2
Filing date	Dec 14, 2022
Priority date	Jun 27, 2022
Publication date	Apr 7, 2026
Grant date	Apr 7, 2026

Abstract

A display panel and a preparation method thereof, and a display device. The display panel includes a display main body, which includes a display area and an encapsulation area, and the display panel further has deformation detection elements, including: an electro-display module having one or more electro-display units, and a piezoelectric module positioned on a surface of at least one deformable functional layer in the display main body, and positioned in the encapsulation area. The piezoelectric module includes two or more piezoelectric units disposed at intervals on the surface of the deformable functional layer, and a voltage difference is applied between two adjacent piezoelectric units. An electro-display unit is connected in series between the two adjacent piezoelectric units. The display panel can detect in real time whether deformation occurs through the deformation detection means, thereby ensuring the encapsulation quality and display effect.

First claim

What is claimed is:

1 . A display panel, comprising a display main body, the display main body comprising a display area and an encapsulation area, wherein the display panel further comprises a deformation detection means, the deformation detection means comprises:
an electro-display module comprising one or more electro-display units; and a piezoelectric module positioned on a surface of at least one deformable functional layer in the display main body and positioned in the encapsulation area; wherein the piezoelectric module comprises at least one first piezoelectric unit and at least one second piezoelectric unit, and a voltage difference is applied between the first piezoelectric unit and the second piezoelectric unit; and wherein the first piezoelectric unit and the second piezoelectric unit disposed on the surface of a same deformable functional layer are alternated and spaced apart from each other, two adjacent piezoelectric units are connected in series by an electro-display unit therebetween, and a spacing between the two adjacent piezoelectric units is such that when the deformable functional layer is deformed, the two adjacent piezoelectric units contact each other to generate a pressure signal which is converted into an electrical signal, and the electrical signal excites the electro-display unit that is connected in series between the first piezoelectric unit and the second piezoelectric unit to display.

2 . The display panel according to claim 1 , wherein the first piezoelectric unit comprises a first electrode layer and a first piezoelectric layer laminated and bonded with the first electrode layer, the second piezoelectric unit comprises a second electrode layer and a second piezoelectric layer laminated and bonded with the second electrode layer, and the first electrode layer and the second electrode layer are disposed alternately and spaced apart on the surface of the deformable functional layer, when the deformable functional layer is deformed, the two adjacent piezoelectric units contact each other to generate the pressure signal which is converted into the electrical signal; and/or
each of the electro-display units comprises an electrochromic unit and/or an electroluminescent unit; and/or the electro-display units and the first and second piezoelectric units are disposed on the surface of the same deformable functional layer, and the electro-display units are located in a non-display area of the display main body; and/or the deformable functional layer comprises a color film substrate; and/or the first and second piezoelectric units are disposed surrounding the display area.

3 . The display panel according to claim 2 , wherein the spacing between the first piezoelectric unit and the second piezoelectric unit adjacent with each other is 100-200 μm; and/or
the first piezoelectric unit and/or the second piezoelectric unit is in a block-like shape, a length of a cross section of the first piezoelectric unit and/or the second piezoelectric unit parallel to the deformable functional layer is 100-1000 μm, and a width is 100-500 μm; and/or
a thickness of the first electrode layer and/or the second electrode layer is 100-500 μm; and/or
a thickness of the first piezoelectric layer and/or the second piezoelectric layer is 100-500 μm; and/or
a piezoelectric material of the first piezoelectric layer and/or the second piezoelectric layer independently comprises one of polyvinylidene fluoride, lead metaniobate, lithium gallate, lithium germanate, titanium germanate, iron transistor lithium niobate, and lithium tantalate; and/or
the first piezoelectric unit comprises a first insulating layer laminated and bonded on a surface of the first piezoelectric layer facing away from the first electrode layer; and/or
the second piezoelectric unit comprises a second insulating layer laminated and bonded on a surface of the second piezoelectric layer facing away from the second electrode layer.

4 . The display panel according to claim 3 , wherein at least part of an edge of the first insulating layer extends to contact the first electrode layer and covers the first piezoelectric layer, and a first piezoelectric protrusion is formed by the first piezoelectric layer extending out of the first insulating layer on a side facing an adjacent piezoelectric unit; and/or
at least part of an edge of the second insulating layer extends to contact the second electrode layer, and covers the second piezoelectric layer, and a second piezoelectric protrusion is formed by the second piezoelectric layer extending out of the second insulating layer on a side facing an adjacent piezoelectric unit; and/or a material of the first insulating layer and/or the second insulating layer independently comprises at least one of silicon oxide, indium tin oxide, polyethylene, and epoxy resin; and/or a thickness of the first insulating layer and/or the second insulating layer is 100-500 □m.

5 . The display panel according to claim 4 , wherein a length of the first piezoelectric protrusion and/or the second piezoelectric protrusion is 100-250 μm; and/or
the first piezoelectric unit is in the block-like shape, and four corners of the first insulating layer extend, covering four corners of the first piezoelectric layer, until contact the first electrode layer; and/or
the second piezoelectric unit is in the block-like shape, and four corners of the second insulating layer extend, covering four corners of the second piezoelectric layer, until contact the second electrode layer.

6 . The display panel according to claim 2 , wherein polarities of the first electrode layer and the second electrode layer are different; or
the polarities of the first electrode layer and the second electrode layer are the same, and materials of the first piezoelectric layer and the second piezoelectric layer are different; or the polarities of the first electrode layer and the second electrode layer are the same, and the materials of the first piezoelectric layer and the second piezoelectric layer are the same, while volumes of the first piezoelectric layer and the second piezoelectric layer are different; or the polarities of the first electrode layer and the second electrode layer are the same, while the materials and the volumes of the first piezoelectric layer and the second piezoelectric layer are different; or the polarities of the first electrode layer and the second electrode layer are different, the materials of the first piezoelectric layer and the second piezoelectric layer are different, and the volumes of the first piezoelectric layer and the second piezoelectric layer are different.

7 . The display panel according to claim 3 , wherein polarities of the first electrode layer and the second electrode layer are different; or
the polarities of the first electrode layer and the second electrode layer are the same, and materials of the first piezoelectric layer and the second piezoelectric layer are different; or the polarities of the first electrode layer and the second electrode layer are the same, and the materials of the first piezoelectric layer and the second piezoelectric layer are the same, while volumes of the first piezoelectric layer and the second piezoelectric layer are different; or the polarities of the first electrode layer and the second electrode layer are the same, while the materials and the volumes of the first piezoelectric layer and the second piezoelectric layer are different; or the polarities of the first electrode layer and the second electrode layer are different, the materials of the first piezoelectric layer and the second piezoelectric layer are different, and the volumes of the first piezoelectric layer and the second piezoelectric layer are different.

Assignees

• Mianyang Hkc Optoelectronics Tech Co Ltd
• Hkc Corporation Ltd

Inventors

• Zhang Jianying
• Yuan Haijiang

Classifications

• H10P74/203

  Structural properties, e.g. testing or measuring thicknesses, line widths, warpage, bond strengths or physical defects · CPC title

• G02F1/1341

  Filling or closing of cells · CPC title

• G02F1/1309 Primary

  Repairing; Testing · CPC title

• G02F2201/44

  Arrangements combining different electro-active layers, e.g. electrochromic, liquid crystal or electroluminescent layers · CPC title

• G02F1/163

  Operation of electrochromic cells, e.g. electrodeposition cells; Circuit arrangements therefor · CPC title