CN117594611A - Stretchable display panel and stretchable display device - Google Patents

Stretchable display panel and stretchable display device Download PDF

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Publication number
CN117594611A
CN117594611A CN202311635508.4A CN202311635508A CN117594611A CN 117594611 A CN117594611 A CN 117594611A CN 202311635508 A CN202311635508 A CN 202311635508A CN 117594611 A CN117594611 A CN 117594611A
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CN
China
Prior art keywords
stretchable
display panel
stretchable display
wires
island
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Pending
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CN202311635508.4A
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Chinese (zh)
Inventor
徐传祥
曲燕
孟凡娜
黄雅莉
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BOE Technology Group Co Ltd
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BOE Technology Group Co Ltd
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Priority to CN202311635508.4A priority Critical patent/CN117594611A/en
Publication of CN117594611A publication Critical patent/CN117594611A/en
Pending legal-status Critical Current

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L27/00—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate
    • H01L27/02—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having potential barriers; including integrated passive circuit elements having potential barriers
    • H01L27/12—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having potential barriers; including integrated passive circuit elements having potential barriers the substrate being other than a semiconductor body, e.g. an insulating body
    • H01L27/1214—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having potential barriers; including integrated passive circuit elements having potential barriers the substrate being other than a semiconductor body, e.g. an insulating body comprising a plurality of TFTs formed on a non-semiconducting substrate, e.g. driving circuits for AMLCDs
    • H01L27/1218—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having potential barriers; including integrated passive circuit elements having potential barriers the substrate being other than a semiconductor body, e.g. an insulating body comprising a plurality of TFTs formed on a non-semiconducting substrate, e.g. driving circuits for AMLCDs with a particular composition or structure of the substrate
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
    • G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
    • G09F9/301—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements flexible foldable or roll-able electronic displays, e.g. thin LCD, OLED
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
    • G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
    • G09F9/33—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements being semiconductor devices, e.g. diodes
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
    • G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
    • G09F9/33—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements being semiconductor devices, e.g. diodes
    • G09F9/335—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements being semiconductor devices, e.g. diodes being organic light emitting diodes [OLED]
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L25/00—Assemblies consisting of a plurality of individual semiconductor or other solid state devices ; Multistep manufacturing processes thereof
    • H01L25/16—Assemblies consisting of a plurality of individual semiconductor or other solid state devices ; Multistep manufacturing processes thereof the devices being of types provided for in two or more different main groups of groups H01L27/00 - H01L33/00, or in a single subclass of H10K, H10N, e.g. forming hybrid circuits
    • H01L25/167—Assemblies consisting of a plurality of individual semiconductor or other solid state devices ; Multistep manufacturing processes thereof the devices being of types provided for in two or more different main groups of groups H01L27/00 - H01L33/00, or in a single subclass of H10K, H10N, e.g. forming hybrid circuits comprising optoelectronic devices, e.g. LED, photodiodes
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L27/00—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate
    • H01L27/02—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having potential barriers; including integrated passive circuit elements having potential barriers
    • H01L27/12—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having potential barriers; including integrated passive circuit elements having potential barriers the substrate being other than a semiconductor body, e.g. an insulating body
    • H01L27/1214—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having potential barriers; including integrated passive circuit elements having potential barriers the substrate being other than a semiconductor body, e.g. an insulating body comprising a plurality of TFTs formed on a non-semiconducting substrate, e.g. driving circuits for AMLCDs
    • H01L27/124—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having potential barriers; including integrated passive circuit elements having potential barriers the substrate being other than a semiconductor body, e.g. an insulating body comprising a plurality of TFTs formed on a non-semiconducting substrate, e.g. driving circuits for AMLCDs with a particular composition, shape or layout of the wiring layers specially adapted to the circuit arrangement, e.g. scanning lines in LCD pixel circuits
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L33/00—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
    • H01L33/48—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof characterised by the semiconductor body packages
    • H01L33/62—Arrangements for conducting electric current to or from the semiconductor body, e.g. lead-frames, wire-bonds or solder balls
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
    • H10K59/10—OLED displays
    • H10K59/12—Active-matrix OLED [AMOLED] displays
    • H10K59/131—Interconnections, e.g. wiring lines or terminals
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
    • H10K59/90—Assemblies of multiple devices comprising at least one organic light-emitting element
    • H10K59/95—Assemblies of multiple devices comprising at least one organic light-emitting element wherein all light-emitting elements are organic, e.g. assembled OLED displays
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K77/00—Constructional details of devices covered by this subclass and not covered by groups H10K10/80, H10K30/80, H10K50/80 or H10K59/80
    • H10K77/10—Substrates, e.g. flexible substrates
    • H10K77/111—Flexible substrates

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  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Power Engineering (AREA)
  • Computer Hardware Design (AREA)
  • Condensed Matter Physics & Semiconductors (AREA)
  • Theoretical Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Optics & Photonics (AREA)
  • Devices For Indicating Variable Information By Combining Individual Elements (AREA)
  • Electroluminescent Light Sources (AREA)

Abstract

The utility model provides a but stretchable display panel and stretchable display device, this panel include stretchable base plate and locate the flexible substrate of its one side, flexible substrate keep away from stretchable base plate one side and be equipped with a plurality of island structures, bridge structure and blank district, be equipped with at least one subpixel on the island structure, adjacent island structure is connected to the bridge structure, is equipped with the wiring of many electrical connection subpixels on the bridge structure. The flexible substrate comprises a solid part and a hollowed-out part, the island structure is arranged corresponding to the solid part, and the bridge structure, the blank area and the hollowed-out part are arranged corresponding to the hollowed-out part; the plurality of wires comprise a plurality of first wires extending along a first direction and a plurality of second wires extending along a second direction, and the plurality of first wires are independently arranged or arranged in the same bearing matrix; the second wirings are independently arranged or arranged in the same bearing matrix. The area corresponding to the bridge structure is the hollowed-out part, so that the area of the hollowed-out part is increased, and the stretchable rate of the stretchable display panel is increased.

Description

Stretchable display panel and stretchable display device
Technical Field
The present disclosure relates to the field of display technologies, and in particular, to a stretchable display panel and a stretchable display device.
Background
With the development of display technology, display screens are gradually applied to various industries, and in application fields such as wearable display, rigid display screens cannot meet the application requirements, so that stretchable display screens are generated. However, the stretchable display screen has a low stretchability, and it is difficult to satisfy user demands.
Disclosure of Invention
An object of the embodiment of the application is to provide a stretchable display panel and a stretchable display device, which can improve the stretchable rate of the stretchable display panel and better meet the user demands. The specific technical scheme is as follows:
a first aspect of the present application provides a stretchable display panel comprising: the flexible substrate comprises a stretchable substrate and a flexible substrate arranged on one side of the stretchable substrate, wherein a plurality of island structures and a plurality of bridge structures are arranged on one side, away from the stretchable substrate, of the flexible substrate, at least one sub-pixel is arranged on each island structure, adjacent island structures are connected through the bridge structures, and a plurality of wirings electrically connected with the sub-pixels are arranged on each bridge structure; the flexible substrate comprises a solid part and a hollowed-out part, the island structure is arranged corresponding to the solid part, and the bridge structure is arranged corresponding to the hollowed-out part; the plurality of wires comprise a plurality of first wires extending along a first direction and a plurality of second wires extending along a second direction, and the plurality of first wires are independently arranged or the plurality of first wires are arranged in the same bearing matrix; the second wires are independently arranged, or the second wires are arranged in the same bearing matrix.
In addition, the stretchable display panel provided according to the first aspect of the present application may further have the following technical features:
in some embodiments, the first trace includes a first portion and a second portion connected to each other, the first portion is located in the bridge structure, the second portion is located in the island structure, the second trace includes a third portion and a fourth portion connected to each other, the third portion is located in the bridge structure, the fourth portion is located in the island structure, the island structure includes a pixel driving circuit corresponding to each sub-pixel, a plurality of signal lines of the pixel driving circuit are electrically connected to the second portion through a first transfer line, and the first transfer line is connected to the first trace by lap joint electrically through the flexible substrate; the plurality of signal wires of the pixel driving circuit are electrically connected with the fourth part through a second switching wire, and the second switching wire penetrates through the flexible substrate and is electrically connected with the second wiring in a lap joint mode.
In some embodiments, the second portion extends through the island structure along the first extension direction and is located between the flexible substrate and the stretchable substrate; alternatively, the fourth portion extends through the island structure in the second extension direction and is located between the flexible substrate and the stretchable substrate.
In some embodiments, the display panel further includes a first protective layer and a second protective layer, the first protective layer covers the first wiring, the second protective layer covers the second wiring, a plurality of signal lines of the pixel driving circuit penetrate through the first protective layer and are electrically connected with the second part lower lap joint, and a plurality of signal lines of the pixel driving circuit penetrate through the second protective layer and are electrically connected with the fourth part lower lap joint.
In some embodiments, the first plurality of traces and/or the second plurality of traces are arranged in a broken line, an S-shape, or a wavy line.
In some embodiments, the first trace includes a power supply voltage line, a common ground voltage line, a sensing trace, and a data signal line, and the second trace includes a scan signal (San) line, a light emission control signal (EM) line, an initial signal line, a touch trace, and a reset voltage line.
In some embodiments, the power supply voltage line, the common ground voltage line, and the data signal line are disposed in the same layer.
In some embodiments, the scan signal line is disposed adjacent to the light emission control signal line, and a pitch between the scan signal line and the light emission control signal line is greater than a pitch between the scan signal line and the initial signal line.
In some embodiments, the island structures are square or rectangular, and the island structures are arranged in an array along a direction with a preset included angle between any side of the square or the rectangle and the horizontal direction, wherein the preset included angle is 0-45 degrees.
A second aspect of the present application provides a stretchable display device comprising a stretchable display panel as described above.
The beneficial effects of the embodiment of the application are that:
the flexible substrate of the stretchable display panel provided by the embodiment of the application comprises the entity part and the hollowed-out part, the entity part and the island structure are correspondingly arranged, so that the orthographic projection area of the entity part on the stretchable substrate is equal to the orthographic projection area of the island structure on the stretchable substrate, the entity part only exists at the position corresponding to the island structure, the thickness of the bridge structure and other areas where the island structure is not arranged is reduced, and the stretching performance of the stretchable display panel is increased. The hollow part enables the flexible substrate to generate stretching strain when being stretched, the area corresponding to the bridge structure is also set to be the hollow part, the area of the hollow part is further increased, and therefore the stretching strain of the flexible substrate can be further increased, and the stretching rate of the stretchable display panel is further increased.
In addition, the plurality of first wires are independently arranged, so that signal interference among the first wires can be reduced, and display quality is improved. The second wires are independently arranged, so that signal interference among the second wires can be reduced, and display quality is improved. Optionally, the first wires may be disposed in parallel and spaced apart from each other, and the second wires may be disposed in parallel and spaced apart from each other, so that the thickness of the stretchable display panel may be effectively controlled.
The first wires are arranged in the same bearing matrix, the bearing matrix can improve the tensile strength of the first wires, and the risk of damage of the first wires in the stretching process of the stretchable substrate is reduced. Similarly, the plurality of second wires are arranged in the same bearing matrix, the bearing matrix can improve the tensile strength of the second wires, and the risk of damaging the second wires in the stretching process of the stretchable substrate is reduced.
Of course, not all of the above-described advantages need be achieved simultaneously in practicing any one of the products or methods of the present application.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following description will briefly introduce the drawings that are required to be used in the embodiments or the description of the prior art, and it is obvious that the drawings in the following description are only some embodiments of the present application, and other embodiments may also be obtained according to these drawings to those skilled in the art.
Fig. 1 is a schematic structural diagram of a display panel according to an embodiment of the present disclosure;
fig. 2 is a schematic structural diagram of a display panel according to another embodiment of the present disclosure;
fig. 3 is a top view of a display panel according to an embodiment of the present disclosure;
fig. 4 is a schematic structural diagram of a display panel according to another embodiment of the present disclosure, where a first wire and a second wire are independently disposed;
fig. 5 is a schematic structural diagram of a display panel according to another embodiment of the present disclosure, where a first trace and a second trace are separately disposed;
FIG. 6 is a simplified cross-sectional view taken along the direction A-A' in FIG. 5;
FIG. 7 is a detailed cross-sectional view taken along the direction A-A' in FIG. 5;
fig. 8 is a schematic structural diagram of a display panel according to another embodiment of the present disclosure, where a first trace and a second trace are respectively disposed in a carrier substrate;
fig. 9 is a schematic structural diagram of a display panel according to another embodiment of the present disclosure, where a first trace and a second trace are respectively disposed in a carrier substrate;
FIG. 10 is a simplified cross-sectional view taken along the direction B-B' in FIG. 9;
FIG. 11 is a detailed cross-sectional view taken along the direction B-B' in FIG. 9;
fig. 12 is a schematic structural diagram of a display panel according to another embodiment of the present disclosure, in which the first trace or the second trace penetrates the island region.
The reference numerals are as follows:
a display area A; a non-display area B; a stretchable substrate 100; a flexible substrate 101; a buffer layer 102; a solid portion 1011; a hollowed-out portion 1012; island structures 200; a sub-pixel 201; a drive back plate 2011; a pixel electrode 2012; a light emitting element 2013; a red light emitting element 2013a; a green light-emitting element 2013b; a blue light-emitting element 2013c; a common electrode 2014; a packaging layer 2015; a thin film transistor T; a drain electrode T1; a gate T2; a source T3; a bridge structure 300; a first trace 301; a first portion 3011; a second portion 3012; a power supply voltage line 3013; a common ground voltage line 3014; a data signal line 3015; sensing wiring 3016; a second trace 302; a third portion 3021; a fourth portion 3022; a scanning signal line 3023; a light emission control signal line 3024; an initial signal line 3025; touch trace 3026; blank area 400; a first protective layer 500; a second protective layer 600; a first transfer line 700; a second patch cord 800; presetting an included angle alpha; a first direction X; a second direction Y.
Detailed Description
The following description of the embodiments of the present application will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all, of the embodiments of the present application. Based on the embodiments herein, a person of ordinary skill in the art would be able to obtain all other embodiments based on the disclosure herein, which are within the scope of the disclosure herein.
An embodiment of the present application provides a stretchable display panel, as shown in fig. 1, fig. 2, and fig. 5 to fig. 7, including: a stretchable substrate 100 and a flexible substrate 101 provided on one side of the stretchable substrate 100. The flexible substrate 101 is provided with a plurality of island structures 200 and a plurality of bridge structures 300 on a side far away from the stretchable substrate 100, and a blank area 400 outside the island structures 200 and the bridge structures 300, at least one sub-pixel 201 is arranged on the island structures 200, adjacent island structures 200 are connected through the bridge structures 300, and a plurality of wirings electrically connected with the sub-pixels 201 are arranged on the bridge structures 300. The flexible substrate 101 includes a solid portion 1011 and a hollow portion 1012, the island structure 200 is disposed corresponding to the solid portion 1011, and the bridge structure 300 and the blank area 400 are disposed corresponding to the hollow portion 1012. The plurality of wires comprise a plurality of first wires 301 extending along a first direction X and a plurality of second wires 302 extending along a second direction Y, wherein the plurality of first wires 301 are independently arranged or the plurality of first wires 301 are arranged in the same bearing matrix; the plurality of second wires 302 are disposed independently, or the plurality of second wires 302 are disposed in the same carrier substrate.
The display panel includes a display area a and a non-display area B, where the non-display area B may be disposed around the display area a, or the non-display area B may be disposed on one side or two opposite sides of the display area a, which is not limited in this application, and in fig. 3, only the non-display area B is disposed on one side of the display area a for illustration. Referring to fig. 3, the island structures 200 and the bridge structures 300 may be disposed only in the display region a, which is a high-ratio stretch region (e.g., 20 to 40% stretchable), and the non-display region B is a low-ratio stretch region (e.g., 1 to 10% stretchable), the stretch properties of which depend mainly on the deformability of the material itself. The island structure 200 and the bridge structure 300 may be disposed in both the display area a and the non-display area B, i.e., both the display area a and the non-display area B have a larger stretching ratio. Even though both the display area a and the non-display area B are provided with the island structure 200 and the bridge structure 300, the display area a is a major stretching area due to its area advantage.
In this embodiment, the arrangement of the solid portion 1011 corresponding to the island structure 200 can be understood that the orthographic projection of the solid portion 1011 on the stretchable substrate 100 is substantially equal to the orthographic projection area of the island structure 200 on the stretchable substrate 100, and the solid portion 1011 exists only at the position corresponding to the island structure 200, so as to reduce the thickness of the bridge structure 300 and other areas where the island structure 200 is not arranged, and increase the stretching performance of the stretchable display panel. The hollowed-out portion 1012 allows the flexible substrate 101 to generate tensile strain when being stretched, and the area corresponding to the bridge structure 300 is also set as the hollowed-out portion 1012, so that the area of the hollowed-out portion 1012 is further increased, and the tensile strain of the flexible substrate 101 can be further increased, thereby increasing the stretchability of the stretchable display panel.
Referring to fig. 4 and 5, the plurality of first traces 301 are independently arranged, so that signal interference between the first traces 301 can be reduced, and display quality can be improved. The plurality of second wires 302 are independently arranged, so that signal interference between the second wires 302 can be reduced, and display quality can be improved. Alternatively, the first wires 301 may be disposed in parallel and spaced apart from each other, and the second wires 302 may be disposed in parallel and spaced apart from each other, so that the thickness of the stretchable display panel may be effectively controlled.
Referring to fig. 8 and 9, the plurality of first traces 301 are disposed in the same carrier substrate, and the carrier substrate may improve the tensile strength of the first traces 301 and reduce the risk of the first traces 301 being damaged during the stretching process of the stretchable substrate 100. Similarly, the plurality of second wires 302 are disposed in the same carrier substrate, which can improve the tensile strength of the second wires 302 and reduce the risk of damaging the second wires 302 during the stretching process of the stretchable substrate 100.
Specifically, the step of disposing the plurality of first traces 301 in the same carrier substrate may be: a first portion of the carrier substrate below the first trace 301 is formed, then the first trace 301 is formed on the carrier substrate, and then a second portion of the carrier substrate is formed above the first trace 301, and the first trace 301 is wrapped therein after the first portion and the second portion are surrounded. The steps of disposing the second trace 302 in the same carrier substrate are the same as those of disposing the first trace 301.
The first and second wirings 301 and 302 may be made of a single-layer or multi-layer film stack of a metal material or an alloy such as titanium (Ti), aluminum (Al), molybdenum (Mo), neodymium (Nd), niobium (Nb), copper (Cu), silver (Ag), gold (Au), or the like.
Alternatively, the stretchable substrate 100 has an elastic modulus smaller than that of the flexible substrate 101. Modulus refers to the ratio of stress to strain of a material in a stressed state, and the stress and strain of the material are in a proportional relationship (namely, accord with Hooke's law) in an elastic deformation stage, and the proportional coefficient is called elastic modulus. The elastic modulus can be regarded as an index for measuring the degree of difficulty in generating elastic deformation of a material, and the larger the value is, the larger the stress for generating certain elastic deformation of the material is, namely the larger the rigidity of the material is, namely the smaller the elastic deformation is under the action of certain stress. The elastic modulus E refers to the stress required by the material to generate unit elastic deformation under the action of external force. It is an index reflecting the ability of the material to resist elastic deformation, corresponding to the stiffness in a conventional spring.
When the modulus of elasticity is relatively high, the strength may be relatively high. Accordingly, the plurality of flexible substrates 101 may be rigid substrates that are more rigid than the stretchable substrate 100.
In general, a stretchable display device requires a flexible or stretchable property, and thus attempts have been made to use a substrate having a flexible property due to a small modulus. However, when a flexible material having a small modulus such as Polydimethylsiloxane (PDMS) is used as the stretchable substrate 100, the material having a small modulus is not heat-resistant, and thus, there is a problem in that the substrate is damaged by a high temperature (e.g., a temperature exceeding 100 ℃ generated in the process of forming the transistor and the light emitting element 2013) due to this characteristic. Accordingly, the light emitting element 2013 of each sub-pixel 201 is formed on the flexible substrate 101 having a high elastic modulus, such as Polyimide (PI), and the flexible substrate 101 has a high elastic modulus, and can withstand high temperatures, and damage to the light emitting element 2013 of each sub-pixel 201 can be suppressed during manufacturing.
The first direction X and the second direction Y may be vertical, and one of the first direction X and the second direction Y may be a horizontal direction, and the other may be a vertical direction. In fig. 1, 2, 4, 5, and 8 and 9, the first direction X is shown as the horizontal direction.
In some embodiments, referring to fig. 6-9, the first trace 301 includes a first portion 3011 and a second portion 3012 connected to each other, the first portion 3011 being located within the bridge structure 300, the second portion 3012 being located within the island structure 200, the second trace 302 including a third portion 3021 and a fourth portion 3022 connected to each other, the third portion 3021 being located within the bridge structure 300, the fourth portion 3022 being located within the island structure 200. The island structure 200 includes a pixel driving circuit corresponding to each sub-pixel 201, and a plurality of signal lines of the pixel driving circuit are electrically connected to the second portion 3012 through a first switching line 700, and the first switching line 700 penetrates through the flexible substrate 101 and is electrically connected to the first wiring 301 in a lap joint manner; the plurality of signal lines of the pixel driving circuit are electrically connected to the fourth portion 3022 through the second patch cord 800, and the second patch cord 800 penetrates through the flexible substrate 101 and is electrically connected to the second trace 302 in a lap joint manner.
It will be appreciated that the marking of 301 and 302 at the same routing location does not necessarily represent the same routing, but rather means that 3011 and 3021, 3012 and 3022, 700 and 800, etc. may be similarly routed.
The sub-pixel 201 includes a pixel electrode 2012, a light emitting element 2013, a common electrode 2014, a package layer 2015, and the like in addition to a pixel driving circuit. The pixel driving circuit includes a thin film transistor T on the flexible substrate 101 of the island structure 200, and controls whether the light emitting element 2013 emits light or not through on/off of the thin film transistor T, wherein the light emitting element 2013 may be a Micro LED, a Micro-LED or an organic light emitting element 2013, which is not limited in this application. For example, the light emitting elements 2013 include a red light emitting element 2013a, a green light emitting element 2013b, and a blue light emitting element 2013c, and at least one red light emitting element 2013a, at least one green light emitting element 2013b, and at least one blue light emitting element 2013c constitute one sub-pixel 201. Optionally, a buffer layer 102 is further disposed on one side of the flexible substrate 102, and the thin film transistor T is disposed on the buffer layer 102.
For Micro LEDs and Micro-LEDs, a pixel driving circuit is formed on the driving back plate 2011. As shown in fig. 6 and 7, the pixel driving circuit includes a thin film transistor T on the island structure 200, a drain electrode T1 of the thin film transistor T is connected to a pixel electrode 2012, the pixel electrode 2012 is electrically connected to one side of a light emitting element 2013, and the other side opposite to the light emitting element 2013 is electrically connected to a common electrode 2014. After the scanning signal line 3023 transmits a scanning signal to the driving circuit through the gate electrode T2 of the thin film transistor T and the data signal line 3015 transmits a data signal to the driving circuit through the source electrode T3 of the thin film transistor T, the pixel driving circuit supplies a current to the light emitting element 2013 through the thin film transistor T and the pixel electrode 2012 which are turned on, so that the light emitting element 2013 emits light and displays a screen.
It will be appreciated that the island structure 200 of the display area a may be provided with not only the sub-pixels 201 but also other structures located in the display area a, such as touch electrodes.
Referring to fig. 6, 7, 10 and 11, the second portion 3012 of the first trace 301 is located in the island structure 200, so that a plurality of signal lines of pixel driving circuits of each sub-pixel 201 are electrically connected to the second portion 3012, connection positions of the plurality of signal lines of the pixel driving circuits and the second portion 3012 are located in the island structure 200, and connection points are placed between the flexible substrate 101 and the stretchable substrate 100 through the first transfer line 700, and the flexible substrate 101 has better rigidity to protect the connection points, so that the connection points are not easily broken due to stretching deformation. Illustratively, the pixel driving circuit may employ a 2T1C structure, i.e., a structure of two thin film transistors plus one capacitor, to convert a voltage into a current. Specifically, the 2T1C pixel driving circuit includes: the first thin film transistor, the second thin film transistor and the capacitor. The first thin film transistor is an N-type thin film transistor, and is used as a switching thin film transistor: the second thin film transistor is a P-type thin film transistor, and is used as a driving thin film transistor: the capacitor is a storage capacitor. The gate of the first thin film transistor is electrically connected to the scan signal line 3023 to access the scan signal, the source is electrically connected to the data signal line 3015 to access the data signal, and the drain is electrically connected to the gate of the second thin film transistor and one end of the capacitor: the source of the second thin film transistor is electrically connected to the power supply voltage line 3013, and the drain is electrically connected to the anode of the organic light emitting diode: the cathode of the organic light emitting diode is electrically connected with a common ground voltage line to be connected with a common ground Voltage (VSS): one end of the capacitor is electrically connected with the grid electrode of the second thin film transistor, and the other end of the capacitor is electrically connected with the source electrode of the second thin film transistor. When the OLED displays, the Scan signal (Scan) transmitted by the Scan signal line 3023 controls the first thin film transistor to be turned on, the Data signal (Data) transmitted by the Data signal line 3015 enters the gate electrode and the capacitor of the second thin film transistor through the first thin film transistor, then the first thin film transistor is turned off, and the gate voltage of the second thin film transistor still can keep the Data signal voltage due to the storage effect of the capacitor, so that the second thin film transistor is in an on state, and the driving current enters the organic light emitting diode through the second thin film transistor to drive the organic light emitting diode to emit light. Of course, the pixel driving circuit may also adopt a 7T1C structure, which is not limited in this application.
Of course, the number of the first wirings 301 and the second wirings 302 may vary according to the pixel driving circuit employed. Taking fig. 1 and fig. 2 as an example, the first trace 301 and the second trace 302 are only for illustrating the wiring manner of the first trace 301 and the second trace 302, and do not represent the actual number of traces.
Referring to fig. 6, 7, 10 and 11, the fourth portion 3022 of the second trace 302 is located in the island structure 200, so that a plurality of signal lines of pixel driving circuits of each sub-pixel 201 are electrically connected with the fourth portion 3022, connection positions of the plurality of signal lines of the pixel driving circuits and the fourth portion 3022 are located in the island structure 200, and connection points are placed between the flexible substrate 101 and the stretchable substrate 100 by the second patch cord 800, the flexible substrate 101 has good rigidity to protect the connection points, so that the connection points are not easily broken due to stretching deformation
Alternatively, referring to fig. 12, the second portion 3012 penetrates the island structure 200 in the first extending direction and is located between the flexible substrate 101 and the stretchable substrate 100; alternatively, the fourth portion 3022 penetrates the island structure 200 in the second extension direction and is located between the flexible substrate 101 and the stretchable substrate 100.
The second portion 3012 of the first trace 301 spans the entire island 200 area or the fourth portion 3022 of the second trace 302 spans the entire island 200 area. Taking the example of the second portion 3012 of the first trace 301 crossing the entire island 200 region as an example, by penetrating the second portion 3012 of the first trace 301 through the island 200 in the first direction X, i.e., the second portion 3012 crosses the entire island 200 region, the total length of the first trace 301 is increased, thereby increasing the total deformation of the first trace 301 and reducing the risk of breakage of the first trace 301 when the stretchable substrate 100 is stretch deformed.
The same effect is achieved when the fourth portion 3022 of the second trace 302 spans the entire island structure 200 region, and will not be described here again.
As shown in fig. 10 and 11, the display panel further includes a first protection layer 500 and a second protection layer 600, the first protection layer 500 covers the first wiring 301, the second protection layer 600 covers the second wiring 302, a plurality of signal lines of the pixel driving circuit penetrate through the first protection layer 500 and are electrically connected to the second portion 3012 in a lap joint manner, and a plurality of signal lines of the pixel driving circuit penetrate through the second protection layer 600 and are electrically connected to the fourth portion 3022 in a lap joint manner.
The first protective layer 500 and the second protective layer 600 may be inorganic insulating layers or organic insulating layers. The first protection layer 500 wraps the first wire 301, so that the chance that water vapor, air and the like contact the first wire 301 can be reduced, and the risk that the first wire 301 is corroded by water vapor or air is reduced. The second protection layer 600 wraps the second trace 302, so that the chance that water vapor, air, etc. contacts the second trace 302 can be reduced, and the risk that the second trace 302 is corroded by water vapor or air is reduced.
It should be understood that the cladding herein refers to that the first protective layer 500 wraps the outer surface of the first trace 301 except the bottom surface, and the second protective layer 600 wraps the outer surface of the second trace 302 except the bottom surface, as shown in fig. 10 and 11. The first protection layer 500 may be coated on the outer surface of each independent first trace 301, or may be coated on the outer surface of the carrier substrate; the second protection layer 600 may be coated on the outer surface of each independent second trace 302, or may be coated on the outer surface of the carrier substrate.
As shown in fig. 1, 2, 4, 5, 8 and 9, the first plurality of traces 301 and/or the second plurality of traces 302 are arranged in a broken line, S-shape or wavy line.
The first trace 301 may be in a polygonal line, an S-shape, or a wave shape, or the second trace 302 may be in a polygonal line, an S-shape, or a wave shape, or the first trace 301 and the second trace 302 are simultaneously in a polygonal line, an S-shape, or a wave shape.
When the first trace 301 is in a fold line, S-shape or wave-shape, the stretchable rate of the stretchable display panel along the first direction X may be increased, and when the second trace 302 is in a fold line, S-shape or wave-shape, the stretchable rate of the stretchable display panel along the second direction Y may be increased. When the first trace 301 and the second trace 302 are simultaneously arranged in a fold line, an S shape or a wave shape, the stretching ratio of the stretchable display panel in the first direction X and the second direction Y can be increased simultaneously.
In particular, the fold line may be zigzag, the first trace 301 and the second trace 302 as shown in fig. 1, 5 and 9 may be understood as zigzag, the wave shape may be a sinusoidal waveform, and the wave shape as shown in fig. 2, 4 and 8 may be understood as sinusoidal waveform.
Alternatively, as shown in fig. 4 and 5, the first trace 301 may include a power voltage line 3013 (e.g., VDD), a common ground voltage line 3014 (e.g., VSS), a data signal line 3015, a sensing trace 3016, and the like, and the second trace 302 may include a scan signal line 3023, a light emission control signal line 3024, an initial signal line 3025, a touch trace 3026, a reset voltage line, and the like.
As shown in fig. 7, 11 and 12, the power supply voltage line 3013, the common ground voltage line 3014 and the data signal line 3015 are arranged in the same layer, and the number of wiring layers can be further reduced, so that the thickness of the stretchable display panel can be reduced. Meanwhile, the number of masks (masks) can be reduced, and the manufacturing process of the stretchable display panel is simplified.
In some embodiments, as shown in fig. 4, the scan signal line 3023 is disposed adjacent to the emission control signal line 3024, and the pitch between the scan signal line 3023 and the emission control signal line 3024 is larger than the pitch between the scan signal line 3023 and the initial signal.
The interval between the scanning signal line 3023 and the emission control signal line 3024 is large, so that crosstalk between the scanning signal and the emission control signal can be avoided, and display quality can be improved.
As shown in fig. 1, 2, 4, 5, 8 and 9, the island structure 200 is square or rectangular, but may be circular, and the present application is not limited thereto.
When the island structure 200 is square or rectangular, the island structures 200 are arranged in an array along a direction in which any one side of the square or rectangular forms a preset included angle alpha with the horizontal direction, and the preset included angle alpha is 0-45 degrees. Fig. 1, fig. 5, fig. 9 are schematic diagrams showing that the preset included angle α is 0 °, and fig. 2, fig. 4, and fig. 8 are schematic diagrams showing that the preset included angle α is 45 °.
It is understood that the first direction X and the second direction Y may not change with the array direction of the island structure 200. Whether the preset included angle alpha between the array direction of the island structure 200 and any side of the square or rectangle is 0 degrees or 45 degrees, one of the first direction X and the second direction Y is always parallel to the horizontal direction, and the other is vertical.
Of course, the first direction X and the second direction Y may also be changed along with the array direction of the island structure 200, which is not limited in this application.
The application also provides a stretchable display device comprising the stretchable display panel.
The stretchable display device may be a mobile phone, a tablet, a wearable device, a display screen, or the like, since the stretchable display device may be referred to as a display device that can display an image even if it is bent or stretched. Since it includes the stretchable display panel, the stretchable display device has higher flexibility than the general display device. Accordingly, the shape of the stretchable display apparatus can be freely changed according to a user's operation such as bending or stretching the stretchable display apparatus. For example, when a user holds and pulls one end of the stretchable display device, the stretchable display device may be stretched by the force of the user. Alternatively, when the user places the stretchable display device on an uneven wall, the stretchable display device may be configured to be curved in accordance with the surface shape of the wall. Further, when the force applied by the user is removed, the stretchable display apparatus may return to the original shape.
It is noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
In this specification, each embodiment is described in a related manner, and identical and similar parts of each embodiment are all referred to each other, and each embodiment mainly describes differences from other embodiments. In particular, for system embodiments, since they are substantially similar to method embodiments, the description is relatively simple, as relevant to see a section of the description of method embodiments.
The foregoing description is only of the preferred embodiments of the present application and is not intended to limit the scope of the present application. Any modifications, equivalent substitutions, improvements, etc. that are within the spirit and principles of the present application are intended to be included within the scope of the present application.

Claims (10)

1. A stretchable display panel, comprising:
a stretchable substrate;
the flexible substrate is arranged on one side of the stretchable substrate, one side of the flexible substrate, which is far away from the stretchable substrate, is provided with a plurality of island structures, a plurality of bridge structures and a blank area positioned outside the island structures and the bridge structures, at least one sub-pixel is arranged on the island structures, adjacent island structures are connected through the bridge structures, and a plurality of wirings electrically connected with the sub-pixels are arranged on the bridge structures;
the flexible substrate comprises a solid part and a hollowed-out part, the island structure is arranged corresponding to the solid part, and the bridge structure, the blank area and the hollowed-out part are arranged corresponding to each other;
the plurality of wires comprise a plurality of first wires extending along a first direction and a plurality of second wires extending along a second direction, and the plurality of first wires are independently arranged or the plurality of first wires are arranged in the same bearing matrix;
the second wires are independently arranged, or the second wires are arranged in the same bearing matrix.
2. The stretchable display panel according to claim 1, wherein the first wiring comprises a first portion and a second portion connected to each other, the first portion is located in the bridge structure, the second portion is located in the island structure, the second wiring comprises a third portion and a fourth portion connected to each other, the third portion is located in the bridge structure, the fourth portion is located in the island structure, the island structure comprises a pixel driving circuit corresponding to each sub-pixel, a plurality of signal lines of the pixel driving circuit are electrically connected to the second portion through a first transfer line, and the first transfer line is connected to the first wiring by lap joint through the flexible substrate;
the plurality of signal wires of the pixel driving circuit are electrically connected with the fourth part through a second switching wire, and the second switching wire penetrates through the flexible substrate and is electrically connected with the second wiring in a lap joint mode.
3. The stretchable display panel according to claim 2, wherein the second portion extends through the island structure in the first extension direction and is located between the flexible substrate and the stretchable substrate; alternatively, the fourth portion extends through the island structure in the second extension direction and is located between the flexible substrate and the stretchable substrate.
4. The stretchable display panel according to claim 2, further comprising a first protective layer and a second protective layer, wherein the first protective layer covers the first wiring, the second protective layer covers the second wiring, a plurality of signal lines of the pixel driving circuit penetrate through the first protective layer and are electrically connected with the second portion lower lap joint, and a plurality of signal lines of the pixel driving circuit penetrate through the second protective layer and are electrically connected with the fourth portion lower lap joint.
5. The stretchable display panel according to any of claims 1-4, wherein the plurality of first traces and/or the plurality of second traces are arranged in a fold line, S-shape, or wavy line.
6. The stretchable display panel according to any one of claims 1-4, wherein the first trace comprises a power supply voltage line, a common ground voltage line, a sensing trace, and a data signal line, and the second trace comprises a scan signal line, a light emission control signal line, an initial signal line, a touch trace, and a reset voltage line.
7. The stretchable display panel according to claim 6, wherein the power supply voltage line, the common ground voltage line, and the data signal line are arranged in the same layer.
8. The stretchable display panel according to claim 6, wherein the scan signal line is disposed adjacent to the light emission control signal line, and a pitch between the scan signal line and the light emission control signal line is larger than a pitch between the scan signal line and the initial signal line.
9. The stretchable display panel according to any of claims 1-4, wherein the island structures are square or rectangular, and the island structures are arranged in an array along a direction in which any one side of the square or the rectangle forms a predetermined angle with respect to a horizontal direction, the predetermined angle being 0 ° -45 °.
10. A stretchable display device, characterized in that it comprises the stretchable display panel according to any one of claims 1-9.
CN202311635508.4A 2023-11-30 2023-11-30 Stretchable display panel and stretchable display device Pending CN117594611A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202311635508.4A CN117594611A (en) 2023-11-30 2023-11-30 Stretchable display panel and stretchable display device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202311635508.4A CN117594611A (en) 2023-11-30 2023-11-30 Stretchable display panel and stretchable display device

Publications (1)

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CN117594611A true CN117594611A (en) 2024-02-23

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Family Applications (1)

Application Number Title Priority Date Filing Date
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