CN113330503A - Flexible display screen and display panel - Google Patents
Flexible display screen and display panel Download PDFInfo
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- CN113330503A CN113330503A CN201980079781.9A CN201980079781A CN113330503A CN 113330503 A CN113330503 A CN 113330503A CN 201980079781 A CN201980079781 A CN 201980079781A CN 113330503 A CN113330503 A CN 113330503A
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
- G06F1/16—Constructional details or arrangements
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- 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
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K1/00—Printed circuits
- H05K1/02—Details
Abstract
The utility model provides a flexible display screen (100) and display panel (200), wherein flexible display screen (100) includes kink (10), be equipped with stroke compensation portion (11) on kink (10), when buckling or expand flexible display screen (100), stroke compensation portion (11) compensate flexible display screen (100) and receive the extra stroke that extrudees or stretch and produce to offset the stress that produces when flexible display screen (100) received extrusion or stretch, improved the display effect of flexible display screen (100) under extrusion or tensile state.
Description
The embodiment of the application relates to the technical field of display, in particular to a flexible display screen and a display panel.
With the progress of science and technology and the development of society, the flexible display screen gradually comes into the visual field of consumers, and the flexible display panel brings brand-new user experience to the consumers while facilitating the life of the consumers.
However, when the flexible display screen developed at present is in a stretching and bending process or in a stretching and bending state, the display effect uniformity of the flexible display screen is poor due to the difference between the deformation of the flexible display screen and the deformation of the neutral plane caused by the non-uniform stress.
Disclosure of Invention
The embodiment of the application aims at providing a flexible display screen and a display panel to solve the technical problem that the display effect uniformity of the flexible display screen is poor in the prior art.
The embodiment of the application solves the technical problem and provides the following technical scheme:
a flexible display screen comprising: a bending section; the bending part comprises a stroke compensation part for compensating an extra stroke generated by extrusion or stretching of the flexible display screen when the flexible display screen is bent or unfolded.
Optionally, the flexible display screen further includes a fixing portion connected to two ends of the bending portion, and when the flexible display screen is bent, the length of the fixing portion remains unchanged.
Optionally, the stroke compensation portion includes:
at least two islands;
the bridge of buckling, bridge one end of buckling with one the island portion is connected, the bridge other end of buckling with another the island portion is connected, the bridge of buckling can buckle and stretch out and draw back.
Optionally, a plurality of the islands are arranged in an array, the bending bridges are connected to the middle points of the side edges of the islands, and when the bending portions are bent, any two adjacent rows or two adjacent columns of the islands are parallel.
Optionally, the bending bridge includes at least two symmetrical arc portions, and when the bending portion is bent, the telescopic lengths of the bending bridges in the same row are the same.
Optionally, the island comprises a substrate unit and a pixel unit, the pixel unit being disposed on the substrate unit;
the bending bridge comprises bending units and connecting wires, the connecting wires are arranged on the bending units, two ends of each bending unit are fixedly connected to the substrate units of the two adjacent island-shaped portions respectively, and two ends of each connecting wire are electrically connected to the pixel units of the two adjacent island-shaped portions respectively.
Optionally, the bending unit and the substrate unit are made of the same material.
Optionally, a plurality of the island-shaped portions are respectively connected by the bending bridge along a first direction;
the plurality of island-shaped parts are respectively connected through the bending bridge along a second direction;
the first direction and the second direction are perpendicular to each other, and the plurality of island-shaped parts are arranged in an array.
Optionally, the bending part may bend along a bending axis;
the plurality of island-shaped parts are respectively connected through the bending bridge along a first direction;
the plurality of island-shaped parts are fixedly connected along a second direction respectively;
the first direction and the second direction are perpendicular to each other, and the first direction is perpendicular to the bending axis.
Optionally, the bending unit includes a first bending line and a second bending line, the first bending line and the second bending line extend in opposite directions, and a first gap and a second gap are respectively formed in the middle of the first bending line and the second bending line.
Optionally, the extending direction of the first bending line and the second bending line is perpendicular to the plane of the bending portion.
Optionally, the extending direction of the first bending line and the second bending line is parallel to the plane of the bending portion.
Optionally, the bending unit includes a plurality of bending lines extending in the same direction, and a gap is formed in the middle of the bending lines.
Optionally, four adjacent islands form a quadrangle, and a hollow part is formed in a central area of the quadrangle.
Optionally, the bending device further comprises a fixing portion connected to one side of the bending portion, one end of the bending bridge is fixedly connected to the fixing portion, and the other end of the bending bridge is fixedly connected to the island-shaped portion.
The embodiment of the application also provides the following technical scheme for solving the technical problems:
a display panel, comprising: a first protective layer;
the extrusion deformation layer is positioned on the first protection layer;
the flexible display screen is positioned on one side of the extrusion deformation layer, which is far away from the first protection layer;
the second protective layer is positioned on one side, far away from the first protective layer, of the flexible display screen;
a pressure sensor located between the second protective layer and the crush deformation layer.
Compared with the prior art, in the flexible display screen that this application embodiment provided, through set up stroke compensation portion on the kink, stroke compensation portion is used for buckling or expandes during the flexible display screen, the compensation the flexible display screen receives the extrusion or tensile and the extra stroke that produces to offset the stress that the flexible display screen can receive the extrusion or produce when tensile, improved the display effect of flexible display screen under extrusion or tensile state.
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art that other drawings can be obtained according to the structures shown in the drawings without inventive labor.
Fig. 1 is a schematic structural diagram of a flexible display screen according to an embodiment of the present application;
2-3 are schematic structural diagrams of flexible display screens according to some different embodiments;
FIG. 4 is a schematic structural diagram of a bending bridge of one embodiment of the flexible display panel shown in FIG. 1;
FIG. 5 is a schematic view of a structure of a bending bridge of another embodiment of the flexible display panel shown in FIG. 1;
fig. 6a to 6c are schematic diagrams of the manufacturing method of the flexible display panel of fig. 1 at different stages;
fig. 7a to 7c are schematic diagrams of the manufacturing method of the flexible display screen of another embodiment shown in fig. 1 at different stages;
fig. 8 is a schematic structural diagram of a display panel according to another embodiment of the present application.
The technical solutions in the embodiments of the present application will be described clearly and completely with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. If in the embodiments of the present application there is a description referring to "first", "second", etc., the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present application.
Referring to fig. 1, a flexible display screen 100 provided in an embodiment of the present application includes a bending portion 10, where the bending portion 10 can be bent along a bending axis of the flexible display screen 100. The bending portion 10 includes a stroke compensation portion 11, which is used for compensating an extra stroke generated by pressing or stretching the flexible display screen 100 when the flexible display screen 100 is bent. For example: if the flexible display screen 100 is flat and relaxed in the unfolded state, when the flexible display screen 100 is closed, the flexible display screen 100 may be subjected to stretching (outward bending) or squeezing (inward bending) stress, so as to cause a certain degree of deformation of the flexible display screen 100, and affect the display effect, and the stroke compensation portion 11 may be configured to compensate an additional stroke generated when the flexible display screen 100 is squeezed or stretched when the flexible display screen 100 is bent, so as to offset the stretching or squeezing stress that the flexible display screen 100 may be subjected to, and improve the display effect of the flexible display screen 100 in the bent state. Another example is: if the flexible display screen 100 is flat and relaxed in the bent state, when the flexible display screen 100 is unfolded, the flexible display screen 100 is subjected to a squeezing stress, so that the flexible display screen 100 is deformed to a certain extent, and the display effect is affected, and the stroke compensation portion 11 may be configured to compensate an extra stroke generated by squeezing the flexible display screen 100 when the flexible display screen 100 is unfolded, so as to offset the squeezing stress that the flexible display screen 100 may be subjected to, and improve the display effect of the flexible display screen 100 in the unfolded state.
Referring to fig. 2, the stroke compensation portion 11 includes at least two islands 12 and a bending bridge 14, one end of the bending bridge 14 is connected to one island 12, the other end of the bending bridge 14 is connected to the other island 12, and the bending bridge 14 can be bent and extended. Preferably, in some embodiments, a plurality of the islands 12 are arranged in an array, the bending bridges 14 are connected to the middle points of the side edges of the islands 12, and when the bending portion 10 is bent, any two adjacent rows or two adjacent columns of the islands 12 are parallel.
When the flexible display screen 100 is bent or unfolded, the bending bridge 14 is bent or stretched to a certain extent and drives the island 12 to move, but the size and shape of the island 12 do not change, so as to ensure that the substrate unit 122 and the pixel unit 124 on the island 12 are not affected by the stretching or squeezing stress when the flexible display screen 100 is bent or unfolded, thereby improving the display effect of the flexible display screen 100 in the bent or unfolded state.
In the present embodiment, the plurality of island portions 12 are connected in sequence to the bending bridges 14 in the first direction L1; the plurality of island-like portions 12 are connected in sequence to the bending bridges 14 in the second direction L2; the first direction L1 and the second direction L2 are perpendicular to each other, and the plurality of islands 12 are arranged in an array.
In some embodiments, a plurality of the islands 12 are respectively connected in sequence along the first direction L1 via the bending bridges 14; the plurality of islands 12 are sequentially fixedly connected in the second direction L2; the first direction L1 and the second direction L2 are perpendicular to each other, and the first direction L1 is perpendicular to the bending axis.
The island 12 has a rectangular or approximately rectangular cross-sectional shape. In some embodiments, the cross-sectional shape of the island 12 may also be triangular, circular, diamond, pentagonal, hexagonal, and the like.
Four adjacent islands 12 form a quadrangle, a hollow portion 16 is formed in the central area of the quadrangle, preferably, the islands 12 are respectively disposed at two ends of one diagonal line of the quadrangle, the islands 12 are respectively disposed at two ends of the other diagonal line of the quadrangle, and the two diagonal lines of the quadrangle are perpendicular to each other. The hollow portion 16 can better compensate an extra stroke generated by the bending stress of the flexible display screen 100 when the flexible display screen 100 is bent, so as to offset the stress that the flexible display screen 100 can be subjected to, and improve the display effect of the flexible display screen 100 in a bent state.
Referring to fig. 3, the island 12 includes a substrate unit 122 and a pixel unit 124, and the pixel unit 124 is disposed on the substrate unit 122. The substrate unit 122 carries one or more pixel units 124, and when the substrate unit 122 carries a plurality of pixel units 124, the pixel units 124 are disposed on the substrate unit 122 at intervals of a preset distance.
The cross-sectional shape of the substrate unit 122 is rectangular or approximately rectangular. In some embodiments, the cross-sectional shape of the island 12 may also be triangular, circular, diamond, pentagonal, hexagonal, and the like.
The substrate unit 122 serves as a carrier for supporting the pixel unit 124. In this embodiment, the substrate unit 122 is a two-layer flexible copper clad laminate (abbreviated as "2L-FCCL") composed of a flexible insulating base film and a metal foil, the flexible insulating base film is a polyimide film formed by polycondensing pyromellitic dianhydride (PMDA) and diaminodiphenyl ether (DDE) in a strong polar solvent, casting the resulting product into a film, and imidizing the film, and the metal foil is a copper foil. The bending curvature radius of the two-layer flexible copper clad laminate is less than 3mm, and the two-layer flexible copper clad laminate has excellent flexibility; the thermal expansion coefficient of the two-layer flexible copper clad laminate is less than 7 multiplied by 10－6℃ －1It has good heat resistance stability; the Water Vapor Transmission Rate (WVTR) of the two-layer flexible copper-clad plate is less than 1 multiplied by 10－6g/(m 2D) and Oxygen Transmission Rate (OTR) of less than 1X 10－5g/(m 2D) it has good water and oxygen blocking capacity; the surface roughness of the two-layer flexible copper-clad plate is small by 1nm, the two-layer flexible copper-clad plate not only has the integrity of a multi-layer structure, but also is not easy to crack when a device is bent, and the service life of the device is long.
In some embodiments, the flexible insulating base film may be made of other kinds of flexible materials, such as polyester, polynaphthalene, and the like, and the metal foil may be made of other kinds of metal materials, such as aluminum foil, composite metal foil, and the like, as needed.
In some embodiments, the substrate unit 122 may also be made of other kinds of flexible materials as needed, for example: thermoplastic semi-crystalline polymers, such as PI, PET, PEN and PEEK, have good transparency, low coefficient of thermal expansion, good water and oxygen barrier properties, and are relatively inexpensive; the non-crystalline thermoplastic polymer, such as PC and PES, is formed by solvent injection molding or melt injection molding, has better optical transparency and higher glass transition temperature, and when the thickness of a PC film or PES film reaches 0.1mm, the transmittance in a visible light range can reach more than 85%.
The pixel unit 124 includes a driving circuit, a pixel electrode, an organic light emitting element, a common electrode, a gate line, a data line, and the like, the driving circuit includes a thin film transistor on the island 12, a drain of the thin film transistor is connected to the pixel electrode, the pixel electrode is electrically connected to one side of the organic light emitting element, and the other side of the organic light emitting element opposite to the pixel electrode is electrically connected to the common electrode. After the gate line transmits a scan signal to the driving circuit and the data line transmits a data signal to the driving circuit, the driving circuit supplies a current to the organic light emitting element through the turned-on thin film transistor and the pixel electrode, so that the organic light emitting element emits light and displays a picture.
In this embodiment, the pixel unit 124 and the substrate unit 122 are packaged by using a non-conductive adhesive (NCA) technology, the non-conductive adhesive is a material without conductive particles, and may be of two types, namely, a non-conductive adhesive (NCP) and a non-conductive film (NCF), in this embodiment, the non-conductive adhesive is a non-conductive film, the non-conductive film is attached between the pixel unit 124 and the substrate unit 122, and the pixel unit 124 bumps penetrate through the non-conductive film directly below the pixel unit 124 to directly contact with the corresponding substrate unit 122 lines under pressurization, thereby achieving electrical connection. The non-conductive film is cured by heat and its shrinkage fixes the direct contact between the bumps of pixel element 124 and the printed lines. The curing shrinkage of the non-conductive film at a certain temperature not only ensures stable electrical connection between the pixel unit 124 and the substrate unit 122, but also provides a certain mechanical connection, thereby ensuring good bonding performance of the package body.
Referring to fig. 3, the bending bridge 14 includes a bending unit 142 and a connecting line 144, the connecting line 144 is disposed on the bending unit 142, two ends of the bending unit 142 are respectively and fixedly connected to the substrate units 122 of two adjacent islands 12, and two ends of the connecting line 144 are respectively and electrically connected to the pixel units 124 of two adjacent islands 12.
In this embodiment, the bending unit 142 is in a spring shape, so that the bending unit 142 can be bent and stretched, and meanwhile, the material of the bending unit 142 and the material of the substrate unit 122 are made of the same material, so that the bending unit 142 and the substrate unit 122 can be prepared by a single photolithographic mask process in the process of preparing the bending unit 142 and the substrate unit 122, thereby simplifying the preparation process and improving the preparation efficiency.
Referring to fig. 4, in the embodiment, the bending unit 142 includes a plurality of first bending lines 1442 and a plurality of second bending lines 1444, the first bending lines 1442 and the second bending lines 1444 extend in opposite directions, two ends of the first bending lines 1442 are respectively and fixedly connected to two adjacent second bending lines 1444, and two ends of the second bending lines 1444 are respectively and fixedly connected to two adjacent first bending lines 1442, so that the bending unit 142 is in a spring shape. One end of the first bending line 1442 or the second bending line 1444 on two sides of the bending unit 142 is fixedly connected to the substrate unit 122, respectively.
Meanwhile, a first gap 1443 and a second gap 1445 are respectively formed in the middle of the first bending line 1442 and the second bending line 1444, so that when the flexible display screen 100 is squeezed or stretched, the first bending line 1442 and the second bending line 1444 have better flexibility, and an extra stroke generated by squeezing the flexible display screen 100 is compensated, thereby counteracting a squeezing stress that the flexible display screen 100 can be subjected to, and improving a display effect of the flexible display screen 100 in a spreading state.
In this embodiment, the extending directions of the first bending line 1442 and the second bending line 1444 are perpendicular to the plane of the bending portion 10.
Referring to fig. 5, in some embodiments, the extending directions of the first bending line 1442 and the second bending line 1444 are parallel to the plane of the bending portion 10.
In some embodiments, the bending unit 142 includes a plurality of bending lines extending in the same direction, and two ends of one of the bending lines are respectively and fixedly connected to two adjacent bending lines, so that the bending unit 142 is in a spring shape. One end of the bending line on both sides of the bending unit 142 is fixedly connected to the substrate unit 122, respectively.
Simultaneously the space has been seted up at the middle part of kinking, makes when flexible display screen 100 receives the extrusion or stretches, the kinking has better elasticity, compensates the extra stroke that flexible display screen 100 received the extrusion and produced to offset the extrusion stress that flexible display screen 100 can receive, improve flexible display screen 100 is at the display effect under the expansion state.
In some embodiments, the shape of the bending unit 142 may be set as required, and only the bending unit 142 needs to be bendable and retractable, for example, the bending unit 142 may have a linear shape, other curved shapes, and the like.
In some embodiments, the bending bridges 14 include at least two symmetrical arcs, and the symmetrical arcs are uniformly stressed during bending so that the bending bridges 14 in the same row have the same length during bending of the bending portion 10.
In some embodiments, the number of the bending units 142 between two adjacent islands 12 may be set as required, for example, a plurality of the bending units 142 are disposed between two adjacent islands 12, the plurality of the bending units 142 are disposed at a predetermined distance, and two ends of each of the bending units 142 are respectively fixedly connected to two adjacent islands 12.
In some embodiments, the flexible display 100 further includes a fixing portion 20 connected to both ends of the bending portion 10, and when the flexible display 100 is bent, the length of the fixing portion 20 remains unchanged. Specifically, one end of the bending bridge 14 is fixedly connected to the fixing portion 20, and the other end of the bending bridge 14 is fixedly connected to the island 12.
The difference between the bending portion 10 and the fixing portion 20 is that the island portions 12 of the fixing portion 20 are not connected by the bending bridges 14, but two adjacent island portions 12 of the fixing portion 20 are directly and fixedly connected together, and the connecting line 144 is disposed on the substrate unit 122.
In some embodiments, the flexible display screen 100 further comprises an electrode layer and a control unit, wherein the electrode layer comprises at least one first sub-electrode and at least one second sub-electrode, and the first sub-electrode is insulated from the second sub-electrode and is located on the island 12. One island 12 may have both the first sub-electrode and the second sub-electrode, or one island 12 may have only the first sub-electrode and the other island 12 may have only the second sub-electrode. However, whether the island 12 has the first sub-electrode and the second sub-electrode at the same time, the first sub-electrodes on at least one column of island structures are electrically connected in sequence to form one first electrode, and the second sub-electrodes on at least one row of island 12 are electrically connected in sequence to form one second electrode. In order to ensure the touch detection accuracy and the stretch detection accuracy, the first sub-electrodes on one column of islands 12 are electrically connected in sequence to form a first electrode, and the second sub-electrodes on one row of islands 12 are electrically connected in sequence to form a second electrode.
The control unit is electrically connected with the first electrode and the second electrode. The control unit determines a touch position and/or a stretching state of the stretchable panel according to the capacitance change of the first electrode and the second electrode.
In one embodiment of the present application, a method for manufacturing a flexible display panel 100 is provided, and it should be noted that the above explanation of the embodiment of the flexible display panel 100 is also applicable to a method for manufacturing the flexible display panel 100 of the present embodiment, and details are not repeated here to avoid redundancy.
It should be noted that, in the following embodiments, a certain sequence does not necessarily exist between the following steps, and it can be understood by those skilled in the art from the description of the embodiments of the present application that, in different embodiments, the following steps may have different execution sequences, that is, may be executed in parallel, may also be executed interchangeably, and the like; in various embodiments, some of the steps described below may be omitted or replaced.
The manufacturing method of the flexible display screen 100 includes:
in step S61, a substrate is provided.
Referring to fig. 6a, specifically, the substrate 20 and the substrate unit 122 are made of the same material, for example, the material of the substrate 20 may be Polyimide (PI), Polycarbonate (PC), polyethylene terephthalate (PET), or the like.
Step S62, patterning the substrate to form the substrate unit and the bending unit.
Referring to fig. 6b, specifically, the patterning process may include only a photolithography process, or include a photolithography process and an etching step, and may also include other processes for forming a predetermined pattern, such as printing, ink-jetting, etc.; the photolithography process refers to a process of forming a pattern by using a photoresist, a mask plate, an exposure machine, and the like, including processes of film formation, exposure, development, and the like. The corresponding patterning process may be selected according to the structure formed in the embodiments of the present application.
In this embodiment, a layer of photoresist is formed on the substrate 20, exposed and developed, and then the substrate 20 is dry-etched to simultaneously form the substrate unit 122 and the bending unit 142.
Step S63, pixel units and connection lines are simultaneously formed on the substrate unit and the bending unit, respectively.
Referring to fig. 6c, specifically, a pixel unit 124 is formed on a substrate unit 122, the pixel unit 124 and the substrate unit 122 are packaged by using a non-conductive adhesive (NCA) technology, the pixel unit 124 includes a driving circuit, a pixel electrode, an organic light emitting element, a common electrode, a gate line, a data line, and the like, the driving circuit includes a thin film transistor located on the island 12, a drain of the thin film transistor is connected to the pixel electrode, the pixel electrode is electrically connected to one side of the organic light emitting element, and the other side of the organic light emitting element opposite to the pixel electrode is electrically connected to the common electrode. After the gate line transmits a scan signal to the driving circuit and the data line transmits a data signal to the driving circuit, the driving circuit supplies a current to the organic light emitting element through the turned-on thin film transistor and the pixel electrode, so that the organic light emitting element emits light and displays a picture. The preparation process of the pixel unit 124 belongs to the prior art, and is not described herein again.
In another embodiment of the present application, a manufacturing method of the flexible display panel 100 is provided, and it should be noted that the above explanation of the embodiment of the flexible display panel 100 is also applicable to the manufacturing method of the flexible display panel 100 of the present embodiment, and details are not repeated here to avoid redundancy.
The manufacturing method of the flexible display screen 100 includes:
in step S71, a substrate is provided.
Referring to fig. 7a, specifically, the substrate 20 and the substrate unit 122 are made of the same material, for example, the material of the substrate 20 may be Polyimide (PI), Polycarbonate (PC), polyethylene terephthalate (PET), or the like.
In step S72, pixels and connection lines 144 are formed on the substrate, respectively.
Referring to fig. 7b, specifically, a pixel 30 is formed on a substrate 20, the pixel 30 and the substrate 20 are packaged by a non-conductive adhesive (NCA) technology, the pixel 30 includes a plurality of driving circuits, a plurality of pixel electrodes, a plurality of organic light emitting elements, a plurality of common electrodes, a plurality of gate lines, a plurality of data lines, and the like, the driving circuits include thin film transistors located on the island 12, drain electrodes of the thin film transistors are connected to the pixel electrodes, the pixel electrodes are electrically connected to one side of the organic light emitting elements, and the other side of the organic light emitting elements opposite to the one side is electrically connected to the common electrodes. After the gate line transmits a scan signal to the driving circuit and the data line transmits a data signal to the driving circuit, the driving circuit supplies a current to the organic light emitting element through the turned-on thin film transistor and the pixel electrode, so that the organic light emitting element emits light and displays a picture. The preparation process of the pixel 30 belongs to the prior art and is not described in detail herein.
And step S73, patterning the substrate, the pixels and the connecting lines simultaneously to form a substrate unit, a pixel unit and a bending unit.
Referring to fig. 7c, in particular, the patterning process may include only a photolithography process, or include a photolithography process and an etching step, and may also include other processes for forming a predetermined pattern, such as printing, ink-jetting, etc.; the photolithography process refers to a process of forming a pattern by using a photoresist, a mask plate, an exposure machine, and the like, including processes of film formation, exposure, development, and the like. The corresponding patterning process may be selected according to the structure formed in the embodiments of the present application.
In this embodiment, a layer of photoresist is formed on the substrate, the pixels and the connection lines 144, the photoresist is exposed and developed, and then dry etching is performed on the substrate, the pixels and the connection lines 144 to simultaneously form the substrate unit 122, the pixel unit 124 and the bending unit 142.
Referring to fig. 8, another embodiment of the present application further provides a display panel 200, including: a first protective layer 21, an extrusion deformation layer 22, the flexible display screen 100 in any of the above embodiments, a second protective layer 24, and a pressure sensor; the extrusion deformation layer 22 is positioned on the first protective layer 21; the flexible display screen 100 is positioned on the side of the extrusion deformation layer 22 away from the first protective layer 21; the second protective layer 24 is located on the side of the flexible display 100 away from the first protective layer 21; the pressure sensor is located between the second protective layer 24 and the crush deformation layer 22.
After setting up pressure sensor between flexible display screen 100 and second protective layer 24, when flexible display panel 200 takes place to buckle, first protective layer 21 is crooked and extrusion deformation layer 22, the extrusion deformation layer 22 that the regional correspondence of buckling can be compressed, the deformation power when extrusion deformation layer 22 will buckle flexible display panel 200 at this moment changes for the extrusion force, and transmit the extrusion force to pressure sensor through flexible display screen 100 on, and the degree that flexible display panel 200 buckles is big, then the power that transmits to pressure sensor is also big more, the degree of buckling of user's ability adjustment flexible display panel 200 according to the size of the power that pressure sensor detected, the power that the department of buckling that makes flexible display panel 200 received keeps in the certain limit, thereby the safety in utilization of flexible display panel 200 has been improved to a certain extent. The first protective layer 21 also serves to protect the compression deformation layer 22 from being damaged, the second protective layer 24 serves to protect the pressure sensor from being damaged, and the second protective layer 24 also serves to protect the flexible display screen 100. Moreover, since the deformation of the compression deformation layer 22 can occur under the action of force, when one side of the flexible display panel 200, which is provided with the first protection layer 21, is impacted, the deformation of the compression deformation layer 22 can occur, so that the buffering effect is achieved, and the probability of damage to the flexible display panel 200 when the impact is received is reduced.
Compared with the prior art, the flexible display screen is provided in the display panel of the application, the flexible display screen includes the kink, the kink includes stroke compensation portion for buckle or expand during flexible display screen, the compensation the flexible display screen receives the extrusion or tensile and the extra stroke that produces to offset the stress that the flexible display screen can receive the extrusion or produce when tensile, improved the display effect of flexible display screen under extrusion or tensile state.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit the same; within the context of the present application, where technical features in the above embodiments or in different embodiments can also be combined, the steps can be implemented in any order and there are many other variations of the different aspects of the present application as described above, which are not provided in detail for the sake of brevity; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present application.
Claims (15)
- The utility model provides a flexible display screen, includes the kink, its characterized in that, the kink includes stroke compensation portion for when buckling or expanding flexible display screen, compensate the extra stroke that flexible display screen received the extrusion or tensile and produced.
- Flexible display screen according to claim 1,the flexible display screen further comprises fixing parts connected with the two ends of the bending part, and when the flexible display screen is bent, the length of the fixing parts is kept unchanged.
- The flexible display of claim 1, wherein the travel compensation portion comprises:at least two islands;the bridge of buckling, bridge one end of buckling with one the island portion is connected, the bridge other end of buckling with another the island portion is connected, the bridge of buckling can buckle and stretch out and draw back.
- Flexible display screen according to claim 3,the plurality of island-shaped parts are arranged in an array mode, the bending bridges are connected to the middle points of the side edges of the island-shaped parts, and when the bending parts are bent, any two adjacent rows or two adjacent columns of the island-shaped parts are kept parallel.
- Flexible display screen according to claim 4,the bending bridge at least comprises two symmetrical arc-shaped parts, and when the bending part is bent, the telescopic lengths of the bending bridges in the same row are the same.
- Flexible display screen according to claim 3,the island-shaped part comprises a substrate unit and a pixel unit, and the pixel unit is arranged on the substrate unit;the bending bridge comprises bending units and connecting wires, the connecting wires are arranged on the bending units, two ends of each bending unit are fixedly connected to the substrate units of the two adjacent island-shaped portions respectively, and two ends of each connecting wire are electrically connected to the pixel units of the two adjacent island-shaped portions respectively.
- Flexible display screen according to claim 6,the bending unit and the substrate unit are made of the same material.
- Flexible display screen according to claim 7,the plurality of island-shaped parts are respectively connected through the bending bridge along a first direction;the plurality of island-shaped parts are respectively connected through the bending bridge along a second direction;the first direction and the second direction are perpendicular to each other, and the plurality of island-shaped parts are arranged in an array.
- Flexible display screen according to claim 7,the bending part can be bent along the bending shaft;the plurality of island-shaped parts are respectively connected through the bending bridge along a first direction;the plurality of island-shaped parts are fixedly connected along a second direction respectively;the first direction and the second direction are perpendicular to each other, and the first direction is perpendicular to the bending axis.
- A flexible display screen according to any one of claims 6 to 9,the bending unit comprises a first bending line and a second bending line, the first bending line and the second bending line extend in opposite directions, and a first gap and a second gap are respectively formed in the middle of the first bending line and the middle of the second bending line.
- Flexible display screen according to claim 10,the extending direction of the first bending line and the second bending line is perpendicular to the plane of the bending part.
- Flexible display screen according to claim 10,the extending directions of the first bending line and the second bending line are parallel to the plane of the bending part.
- A flexible display screen according to any one of claims 6 to 9,the bending unit comprises a plurality of bending lines, the plurality of bending lines extend in the same direction, and a gap is formed in the middle of each bending line.
- Flexible display screen according to claim 3,and the four adjacent island-shaped parts form a quadrangle, and a hollow part is formed in the central area of the quadrangle.
- A display panel, comprising:a first protective layer;the extrusion deformation layer is positioned on the first protection layer;the flexible display of any of claims 1-14, on a side of the crush-deformed layer away from the first protective layer;the second protective layer is positioned on one side, far away from the first protective layer, of the flexible display screen;a pressure sensor located between the second protective layer and the crush deformation layer.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/CN2019/086887 WO2020227936A1 (en) | 2019-05-14 | 2019-05-14 | Flexible display screen and display panel |
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| Publication Number | Publication Date |
|---|---|
| CN113330503A true CN113330503A (en) | 2021-08-31 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201980079781.9A Pending CN113330503A (en) | 2019-05-14 | 2019-05-14 | Flexible display screen and display panel |
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| CN (1) | CN113330503A (en) |
| WO (1) | WO2020227936A1 (en) |
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| CN113345326B (en) * | 2021-05-17 | 2022-12-09 | 武汉天马微电子有限公司 | Stretchable display panel and stretchable display device |
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| CN105516409B (en) * | 2015-12-29 | 2018-03-02 | 广东欧珀移动通信有限公司 | Mobile terminal |
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| CN108447401B (en) * | 2018-03-28 | 2020-06-05 | 武汉华星光电技术有限公司 | Flexible display device and deformation compensation method of flexible display screen |
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- 2019-05-14 CN CN201980079781.9A patent/CN113330503A/en active Pending
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| CN107710885A (en) * | 2015-06-30 | 2018-02-16 | 苹果公司 | Electronic equipment with soft inputoutput unit |
| CN108122502A (en) * | 2016-11-30 | 2018-06-05 | 乐金显示有限公司 | Foldable display device |
| CN107331300A (en) * | 2017-07-21 | 2017-11-07 | 上海天马微电子有限公司 | A kind of flexible display panels and flexible display apparatus |
| CN108346377A (en) * | 2018-01-19 | 2018-07-31 | 昆山国显光电有限公司 | A kind of flexible display panels and preparation method thereof, display device |
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| WO2020227936A1 (en) | 2020-11-19 |
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