WO2020227936A1 - 柔性显示屏及显示面板 - Google Patents

柔性显示屏及显示面板 Download PDF

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Publication number
WO2020227936A1
WO2020227936A1 PCT/CN2019/086887 CN2019086887W WO2020227936A1 WO 2020227936 A1 WO2020227936 A1 WO 2020227936A1 CN 2019086887 W CN2019086887 W CN 2019086887W WO 2020227936 A1 WO2020227936 A1 WO 2020227936A1
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WO
WIPO (PCT)
Prior art keywords
bending
flexible display
display screen
island
unit
Prior art date
Application number
PCT/CN2019/086887
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English (en)
French (fr)
Inventor
袁泽
康佳昊
Original Assignee
深圳市柔宇科技有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 深圳市柔宇科技有限公司 filed Critical 深圳市柔宇科技有限公司
Priority to PCT/CN2019/086887 priority Critical patent/WO2020227936A1/zh
Priority to CN201980079781.9A priority patent/CN113330503A/zh
Publication of WO2020227936A1 publication Critical patent/WO2020227936A1/zh

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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
    • 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
    • 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

Definitions

  • the embodiments of the present application relate to the field of display technology, and in particular to a flexible display screen and a display panel.
  • the flexible display that has been developed so far is in the stretch and bending process or in the stretch and bend state, due to the uneven force caused by the difference in the amount of deformation between the flexible display and the neutral surface, the flexible display is The display effect is poor in uniformity.
  • the embodiments of the present application aim to provide a flexible display screen and a display panel to solve the technical problem of poor display effect uniformity of the flexible display screen in the prior art.
  • a flexible display screen comprising: a bending portion; the bending portion includes a stroke compensation portion, which is used to compensate for the compression or stretching of the flexible display screen when the flexible display screen is bent or unfolded Extra trip.
  • the flexible display screen further includes a fixing part connected to both ends of the bending part, and when the flexible display screen is bent, the length of the fixing part remains unchanged.
  • the stroke compensation unit includes:
  • a bending bridge one end of the bending bridge is connected to one of the island-shaped parts, the other end of the bending bridge is connected to the other island-shaped part, and the bending bridge can bend and expand.
  • a plurality of the island-shaped portions are arranged in an array, the bending bridge is connected to the midpoint of the side edge of the island-shaped portion, and when the bending portion is bent, any two adjacent The rows or two columns of islands remain parallel.
  • the bending bridge includes at least two symmetrical arc-shaped portions, and when the bending portions are bent, the lengths of the bending bridges in the same row are the same.
  • the island portion includes a substrate unit and a pixel unit, and the pixel unit is disposed on the substrate unit;
  • the bending bridge includes a bending unit and a connecting line, the connecting line is disposed on the bending unit, and two ends of the bending unit are respectively fixedly connected to the substrates of two adjacent island-shaped portions The two ends of the connecting line are respectively electrically connected to the pixel units of the two adjacent island-shaped portions.
  • the bending unit and the substrate unit are made of the same material.
  • a plurality of the island-shaped portions are respectively connected along the first direction by the bending bridge;
  • a plurality of the island-shaped portions are respectively connected along the second direction by the bending bridge;
  • the first direction and the second direction are perpendicular to each other, and a plurality of the island-shaped portions are arranged in an array.
  • the bending portion may be bent along a bending axis
  • a plurality of the island-shaped portions are respectively connected along the first direction by the bending bridge;
  • a plurality of said island-shaped portions are respectively fixedly connected along a second direction;
  • the first direction and the second direction are perpendicular to each other, and the first direction is perpendicular to the bending axis.
  • the bending unit includes a first bending line and a second bending line, the first bending line and the second bending line extend opposite to each other, and the first bending line and the second bending line are The middle part is respectively provided with a first gap and a second gap.
  • the extension directions of the first bending line and the second bending line are perpendicular to the plane where the bending portion is located.
  • the extension directions of the first bending line and the second bending line are parallel to the plane where the bending portion is located.
  • the bending unit includes a plurality of bending lines, the plurality of bending lines extend in the same direction, and a gap is opened in the middle of the bending line.
  • four adjacent island-shaped portions constitute a quadrilateral, and a hollow portion is formed in a central area of the quadrilateral.
  • it further includes 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 fixed portion.
  • a display panel including: a first protective layer
  • An extruded deformation layer, the extruded deformation layer is located on the first protective layer;
  • the flexible display screen is located on a side of the squeezed deformation layer away from the first protective layer;
  • a second protective layer where the second protective layer is located on a side of the flexible display screen away from the first protective layer;
  • the pressure sensor is located between the second protective layer and the squeezed deformation layer.
  • the flexible display screen provided by the embodiment of the present application, by providing a stroke compensation part on the bending part, when the stroke compensation part is used to bend or unfold the flexible display screen, Compensate for the extra stroke of the flexible display screen being squeezed or stretched, so as to offset the stress generated when the flexible display screen is squeezed or stretched, and improve the flexibility of the flexible display The display effect.
  • FIG. 1 is a schematic structural diagram of a flexible display screen provided by one of the embodiments of the present application.
  • FIGS. 2 to 3 are schematic diagrams showing the structure of flexible display screens according to different embodiments
  • FIG. 4 is a schematic structural diagram of a bending bridge in one embodiment of the flexible display screen shown in FIG. 1;
  • Fig. 5 is a schematic structural diagram of a bending bridge of another embodiment of the flexible display screen shown in Fig. 1;
  • 6a to 6c are schematic diagrams of the manufacturing method of the flexible display screen of one embodiment shown in 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 in different stages;
  • FIG. 8 is a schematic structural diagram of a display panel provided by another embodiment of the present application.
  • a flexible display screen 100 provided in an embodiment of the present application includes a bending portion 10 that can be bent along a bending axis of the flexible display screen 100.
  • the bending portion 10 includes a stroke compensation portion 11 for compensating the extra stroke caused by the flexible display screen 100 being squeezed or stretched when the flexible display screen 100 is bent. For example: if the flexible display screen 100 is flat and relaxed in the unfolded state, then when closed, the flexible display screen 100 will be stretched (outward bending) or squeezing (inward bending) stress, resulting in the flexibility A certain degree of deformation of the display screen 100 affects the display effect.
  • the stroke compensation portion 11 can be used to compensate for the extra squeezing or stretching of the flexible display screen 100 when the flexible display screen 100 is bent.
  • the stroke thereby offsetting the tensile or squeezing stress of the flexible display screen 100, improves the display effect of the flexible display screen 100 in the bent state.
  • the flexible display screen 100 is flat and relaxed in the bent state, the flexible display screen 100 will be subjected to squeezing stress when it is unfolded, resulting in a certain degree of Deformation affects the display effect.
  • the stroke compensation portion 11 can be used to compensate for the extra stroke generated by the flexible display screen 100 being squeezed when the flexible display screen 100 is unfolded, so as to offset the impact that the flexible display screen 100 will experience
  • the compression stress improves the display effect of the flexible display screen 100 in the unfolded state.
  • the stroke compensation portion 11 includes at least two island-shaped portions 12 and a bending bridge 14.
  • One end of the bending bridge 14 is connected to one of the island-shaped portions 12, and the other end of the bending bridge 14 Connected to the other island 12, the bending bridge 14 can bend and stretch.
  • a plurality of the island-shaped portions 12 are arranged in an array, the bending bridge 14 is connected to the midpoint of the side edge of the island-shaped portion 12, and the bending portion 10 is bent When folding, any two adjacent rows or columns of island-shaped portions 12 remain parallel.
  • the bending bridge 14 When the flexible display screen 100 is bent or unfolded, the bending bridge 14 will be bent or stretched to a certain extent, and drive the island 12 to move, but the size and shape of the island 12 It does not change to ensure that when the flexible display screen 100 is bent or unfolded, the substrate unit 122 and the pixel unit 124 on the island 12 will not be affected by stretching or pressing stress, thereby improving the The display effect of the flexible display screen 100 in the bent or unfolded state is described.
  • a plurality of the island-shaped portions 12 are connected in a sequence along the first direction L1 by the bending bridge 14; a plurality of the island-shaped portions 12 are connected in a sequence along the second direction L2 by the bending bridge 14
  • the bridge 14 is connected; the first direction L1 and the second direction L2 are perpendicular to each other, and a plurality of the islands 12 are arranged in an array.
  • a plurality of the island-shaped portions 12 are connected sequentially along the first direction L1 by the bending bridge 14; a plurality of the island-shaped portions 12 are sequentially fixedly connected along a second direction L2; A direction L1 and the second direction L2 are perpendicular to each other, and the first direction L1 is perpendicular to the bending axis.
  • the cross-sectional shape of the island 12 is rectangular or approximately rectangular. In some embodiments, the cross-sectional shape of the island 12 may also be a triangle, a circle, a rhombus, a pentagon, a hexagon, and so on.
  • the four adjacent islands 12 form a quadrilateral.
  • the central area of the quadrilateral is formed with a hollow portion 16.
  • the islands are respectively provided at both ends of one of the diagonals of the quadrilateral 12.
  • Two ends of the other diagonal of the quadrilateral are respectively provided with the island-shaped portions 12, and the two diagonals of the quadrilateral are perpendicular to each other.
  • the hollow portion 16 can better compensate the extra stroke of the flexible display screen 100 caused by bending stress when the flexible display screen 100 is bent, so as to offset the stress that the flexible display screen 100 will receive. The display effect of the flexible display screen 100 in the bent state is improved.
  • 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 of the pixel units 124.
  • the pixel units 124 are arranged on the substrate unit 122 at a predetermined distance .
  • the cross-sectional shape of the substrate unit 122 is rectangular or approximately rectangular.
  • the cross-sectional shape of the island 12 may also be a triangle, a circle, a rhombus, a pentagon, a hexagon, and so on.
  • the substrate unit 122 serves as a carrier for supporting the pixel unit 124.
  • the substrate unit 122 adopts a two-layer flexible copper clad laminate ("2L-FCCL" for short), which is composed of a flexible insulating base film and a metal foil.
  • the flexible insulating base film A polyimide film is used, which is made of pyromellitic dianhydride (PMDA) and diaminodiphenyl ether (DDE) in a strong polar solvent through polycondensation and casting into a film, and then imidization.
  • the metal foil is copper foil.
  • the bending radius of the two-layer flexible copper clad laminate is below 3mm, which has excellent flexibility; the thermal expansion coefficient of the two-layer flexible copper clad laminate is less than 7 ⁇ 10 -6 °C -1 , which has good
  • the thermal stability of the two-layer flexible copper clad laminate (WaterVaporTransmissionRate, WVTR for short) is less than 1 ⁇ 10 -6 g/(m 2 ⁇ d) and oxygen transmission rate (Oxygen Transmission Rale, for short OTR) is less than 1 ⁇ 10 -5 g/(m 2 ⁇ d), which has good water and oxygen resistance; the surface roughness of the two-layer flexible copper clad laminate is less than 1nm, which can not only have a multilayer structure Integrity, and it is not easy to produce cracks when the device is bent, and the device life is long.
  • the flexible insulating base film can be made of other types of flexible materials, such as polyester and polynaphthyl ester, etc.
  • the metal foil can also be made of other types of metal materials, such as aluminum foil and composite metal, as required. Foil etc.
  • the substrate unit 122 can also use other types of flexible materials as required, for example: thermoplastic semi-crystalline polymers, such as PI, PET, PEN, and PEEK, which have good transparency and low thermal expansion coefficient. , Good water and oxygen resistance, and relatively cheap; non-crystalline thermoplastic polymers, such as PC, PES, which are made by solvent injection or melt injection molding, have good optical transparency and high glass transition temperature When the thickness of PC and PES film reaches 0.1mm, the transmittance in the visible light range can reach over 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, etc.
  • the driving circuit includes a thin film transistor located on the island 12, and the drain of the thin film transistor is connected to the The pixel electrode is connected, the pixel electrode is electrically connected to one side of the organic light emitting element, and the opposite side of the organic light emitting element is electrically connected to the common electrode.
  • the driving circuit supplies current to the organic light-emitting element through the turned-on thin film transistor and pixel electrode, so that the organic light-emitting element emits light and displays the screen.
  • the pixel unit 124 and the substrate unit 122 are packaged with non-conductive adhesive (NCA) technology.
  • the non-conductive adhesive is a material that does not contain conductive particles, and non-conductive adhesive (NCP) may be used.
  • the non-conductive adhesive is a non-conductive film, and the non-conductive film is attached between the pixel unit 124 and the substrate unit 122 , Pressurizing causes the bumps of the pixel unit 124 to penetrate the non-conductive film directly below it and directly contact the corresponding circuit of the substrate unit 122, thereby achieving electrical connection.
  • the non-conductive film is cured by heat, and its shrinkage can fix the direct contact between the bumps of the pixel unit 124 and the printed lines.
  • the curing shrinkage of the non-conductive film at a certain temperature not only ensures a stable electrical connection between the pixel unit 124 and the substrate unit 122, but also provides a certain mechanical connection, which ensures good bonding of the package from these two aspects. performance.
  • 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, and both ends of the bending unit 142 are respectively fixedly connected to
  • the two adjacent substrate units 122 of the island-shaped portion 12 have two ends of the connecting line 144 electrically connected to the pixel units 124 of the two adjacent island-shaped portions 12 respectively.
  • the bending unit 142 is spring-shaped, so that the bending unit 142 can be bent and stretched, and the material of the bending unit 142 and the substrate unit 122 are made of the same material, so that In the process of preparing the bending unit 142 and the substrate unit 122, it can be prepared by a one-time photolithography mask process, which simplifies the preparation process and improves the preparation efficiency.
  • the bending unit 142 includes a plurality of first bending lines 1442 and a plurality of second bending lines 1444, and the first bending lines 1442 and the second bending lines 1444 extend opposite to each other. Two ends of the first bending line 1442 are respectively fixedly connected to two adjacent second bending lines 1444, and two ends of the second bending line 1444 are respectively fixedly connected to two adjacent first bending lines 1442, so that the bending unit 142 is spring-shaped. One end of the first bending line 1442 or the second bending line 1444 on both sides of the bending unit 142 is respectively fixedly connected to the substrate unit 122.
  • the middle of the first bending line 1442 and the second bending line 1444 are respectively provided with a first gap 1443 and a second gap 1445, so that when the flexible display screen 100 is squeezed or stretched, the first The bending line 1442 and the second bending line 1444 have better flexibility, compensate for the extra stroke of the flexible display screen 100 being squeezed, so as to offset the squeezing stress that the flexible display screen 100 will receive, and improve the The display effect of the flexible display screen 100 in the expanded state.
  • the extension direction of the first bending line 1442 and the second bending line 1444 is perpendicular to the plane where the bending portion 10 is located.
  • the extending directions of the first bending line 1442 and the second bending line 1444 are parallel to the plane where the bending portion 10 is located.
  • the bending unit 142 includes a plurality of bending lines, the plurality of bending lines extend in the same direction, and two ends of one of the bending lines are respectively fixedly connected to two adjacent bending lines,
  • the bending unit 142 is spring-shaped. One ends of the bending lines on both sides of the bending unit 142 are respectively fixedly connected to the substrate unit 122.
  • the bending line has better stretchability, which compensates for the compression caused by the flexible display screen 100.
  • the extra stroke can offset the squeezing stress that the flexible display screen 100 will experience, and improve the display effect of the flexible display screen 100 in the unfolded state.
  • the shape of the bending unit 142 can be set as required, as long as the bending unit 142 can be bent and stretched.
  • the shape of the bending unit 142 can be linear and Other curve shapes and so on.
  • the bending bridge 14 includes at least two symmetrical arc-shaped portions, and the symmetrical arc-shaped portions are uniformly stressed during bending so that when the bending portion 10 is bent, the bending bridges in the same row The length of the expansion of 14 is the same.
  • the number of the bending units 142 between two adjacent island-shaped portions 12 can be set as required, for example, between two adjacent island-shaped portions 12, There are a plurality of bending units 142, and the plurality of bending units 142 are arranged at a predetermined distance, and two ends of each bending unit 142 are respectively fixedly connected to two adjacent island portions 12.
  • the flexible display screen 100 further includes a fixing part 20 connected to both ends of the bending part 10.
  • the length of the fixing part 20 remains unchanged.
  • one end of the bending bridge 14 is fixedly connected to the fixed portion 20, and the other end of the bending bridge 14 is fixedly connected to the island portion 12.
  • the difference between the bent portion 10 and the fixed portion 20 is that the island-shaped portion 12 of the fixed portion 20 is not connected by the bending bridge 14, but two adjacent ones of the fixed portion 20 The islands 12 are directly and fixedly connected together, and the connecting line 144 is disposed on the substrate unit 122.
  • the flexible display screen 100 further includes an electrode layer and a control unit, the electrode layer includes at least one first sub-electrode and at least one second sub-electrode, the first sub-electrode is insulated from the second sub-electrode , And are all located on the island 12.
  • One island-shaped portion 12 may have both the first sub-electrode and the second sub-electrode, or one island-shaped portion 12 may have only the first sub-electrode, and the other island-shaped portion 12 may have only the second sub-electrode.
  • the first sub-electrodes on at least one row of island-shaped structures are electrically connected in turn to form a first electrode.
  • the second sub-electrodes are sequentially electrically connected to form a second electrode.
  • the first sub-electrodes on a row of island-shaped portions 12 are electrically connected in sequence to form a first electrode, and the second sub-electrodes on a row of island-shaped portions 12 are sequentially electrically connected to form a first electrode.
  • the control unit is electrically connected with the first electrode and the second electrode.
  • the control unit determines the touch position and/or the stretched state of the stretchable panel according to the capacitance change of the first electrode and the second electrode.
  • One of the embodiments of the present application provides a method for manufacturing the flexible display screen 100. It should be noted that the above explanation of the embodiment of the flexible display screen 100 is also applicable to the method for manufacturing the flexible display screen 100 of this embodiment. To avoid redundancy, I will not expand it in detail here.
  • the following steps do not necessarily have a certain sequence. Those of ordinary skill in the art can understand from the description of the embodiments of the present application that in different embodiments, the following The steps may have a different execution order, that is, they may be executed in parallel, or they may be executed interchangeably. In different embodiments, some of the following steps may also be omitted or replaced.
  • the manufacturing method of the flexible display screen 100 includes:
  • Step S61 Provide a substrate.
  • the substrate 20 and the substrate unit 122 use the same material.
  • the material of the substrate 20 may be polyimide (PI), polycarbonate (PC) or polymer. Ethylene phthalate (PET) etc.
  • Step S62 patterning the substrate to form the substrate unit and the bending unit.
  • the patterning process may only include a photolithography process, or include a photolithography process and an etching step, and may also include printing, inkjet and other processes for forming predetermined patterns;
  • photolithography Process refers to the process of using photoresist, mask, exposure machine, etc., to form patterns including film formation, exposure, and development.
  • the corresponding patterning process can be selected according to the structure formed in the embodiment of the present application.
  • a layer of photoresist is formed on the substrate 20, the photoresist is exposed and developed, and then the substrate 20 is dry-etched to simultaneously form the substrate unit 122 and the curved surface. Fold unit 142.
  • Step S63 simultaneously forming pixel units and connecting lines on the substrate unit and the bending unit, respectively.
  • a pixel unit 124 is formed on the substrate unit 122, the pixel unit 124 and the substrate unit 122 are packaged with non-conductive adhesive (NCA) technology, and the pixel unit 124 includes a driving circuit, Pixel electrodes, organic light-emitting elements, common electrodes, gate lines, data lines, etc., the drive circuit includes a thin film transistor located on the island 12, the drain of the thin film transistor is connected to the pixel electrode, and the pixel The electrode is electrically connected to one side of the organic light emitting element, and the opposite side of the organic light emitting element is electrically connected to the common electrode.
  • NCA non-conductive adhesive
  • the driving circuit supplies current to the organic light-emitting element through the turned-on thin film transistor and pixel electrode, so that the organic light-emitting element emits light and displays the screen.
  • the manufacturing process of the pixel unit 124 belongs to the prior art and will not be repeated here.
  • Another embodiment of the present application provides a method for manufacturing the flexible display screen 100. It should be noted that the above explanation of the embodiment of the flexible display screen 100 is also applicable to the method for manufacturing the flexible display screen 100 of this embodiment. To avoid redundancy, I will not expand it in detail here.
  • the manufacturing method of the flexible display screen 100 includes:
  • Step S71 Provide a substrate.
  • the substrate 20 and the substrate unit 122 use the same material.
  • the material of the substrate 20 may be polyimide (PI), polycarbonate (PC), or polymer. Ethylene phthalate (PET) etc.
  • Step S72 forming pixels and connecting lines 144 on the substrate respectively.
  • a pixel 30 is formed on a substrate 20, and a non-conductive adhesive (NCA) technology is used between the pixel 30 and the substrate 20.
  • the pixel 30 includes a plurality of driving circuits and a plurality of pixels. Electrodes, a plurality of organic light emitting elements, a plurality of common electrodes, a plurality of gate lines, a plurality of data lines, etc., the driving circuit includes a thin film transistor located on the island 12, the drain of the thin film transistor and the The pixel electrode is connected, 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 is electrically connected to the common electrode.
  • the driving circuit supplies current to the organic light-emitting element through the turned-on thin film transistor and pixel electrode, so that the organic light-emitting element emits light and displays the screen.
  • the manufacturing process of the pixel 30 belongs to the prior art and will not be repeated here.
  • Step S73 simultaneously patterning the substrate, the pixels and the connecting lines to form a substrate unit, a pixel unit and a bending unit.
  • the patterning process may only include a photolithography process, or include a photolithography process and an etching step, and may also include printing, inkjet, and other processes for forming predetermined patterns;
  • photolithography Process refers to the process of using photoresist, mask, exposure machine, etc., to form patterns including film formation, exposure, and development.
  • the corresponding patterning process can be selected according to the structure formed in the embodiment of the present application.
  • a layer of photoresist is formed on the substrate, the pixels and the connecting lines 144, the photoresist is exposed and developed, and then the substrate, the pixels and the connecting lines 144 are Dry etching to form the substrate unit 122, the pixel unit 124 and the bending unit 142 at the same time.
  • another embodiment of the present application further provides a display panel 200, including: a first protective layer 21, an extruded deformation layer 22, the flexible display screen 100 in any of the above embodiments, and a second protective layer 24 And the pressure sensor; the extrusion deformation layer 22 is located on the first protective layer 21; the flexible display screen 100 is located 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 flexible display screen 100 away from the first protective layer One side of the protective layer 21; the pressure sensor is located between the second protective layer 24 and the squeeze deformation layer 22.
  • the first protective layer 21 bends and squeezes the deformed layer 22, and the bending area corresponds to the squeezed
  • the compressive deformation layer 22 is compressed.
  • the compressive deformation layer 22 converts the deformation force when the flexible display panel 200 is bent into a compressive force, and transmits the compressive force to the pressure sensor through the flexible display 100, and is flexible
  • the user can adjust the degree of bending of the flexible display panel 200 according to the force detected by the pressure sensor to make the flexible display panel 200 bend.
  • the force received by the fold is kept within a certain range, thereby improving the use safety of the flexible display panel 200 to a certain extent.
  • the first protective layer 21 is also used to protect the extrusion deformation layer 22 from being damaged
  • the second protective layer 24 is used to protect the pressure sensor from being damaged.
  • the second protective layer 24 can also protect the flexible display screen 100. effect.
  • the squeeze deformation layer 22 can be deformed under the action of force, when the side where the first protective layer 21 is provided in the flexible display panel 200 is impacted, the squeeze deformation layer 22 can be deformed and act as a buffer. Therefore, the probability of damage to the flexible display panel 200 upon impact is reduced.
  • the display panel of the present application provides a flexible display screen, the flexible display screen includes the bending portion, and the bending portion includes a stroke compensation portion for bending or unfolding the
  • the flexible display screen When the flexible display screen is squeezed or stretched, it compensates for the extra stroke generated by the flexible display screen, so as to offset the stress generated when the flexible display screen is squeezed or stretched, thereby improving the compression of the flexible display screen. Or the display effect in the stretched state.

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Abstract

一种柔性显示屏（100）及显示面板（200），其中柔性显示屏（100）包括弯折部（10），弯折部（10）上设有行程补偿部（11），当弯折或展开柔性显示屏（100）时，行程补偿部（11）补偿柔性显示屏（100）受挤压或拉伸而产生的额外行程，从而抵消柔性显示屏（100）受到挤压或拉伸时产生的应力，提高了柔性显示屏（100）在挤压或拉伸状态下的显示效果。

Description

柔性显示屏及显示面板 技术领域
本申请实施例涉及显示技术领域，特别是涉及一种柔性显示屏及显示面板。
背景技术
随着科技的进步与社会的发展，柔性显示屏逐渐走入了消费者的视野，柔性显示面板在方便消费者生活的同时也为消费者带来了全新的用户体验。
然而，目前已开发的柔性显示屏在拉伸弯折过程中或处于拉伸弯折状态时，由于受力的不均匀造成柔性显示屏与中性面的变形量存在差异，导致柔性显示屏的显示效果均一性较差。
发明内容
本申请实施例旨在提供一种柔性显示屏及显示面板，以解决现有技术中柔性显示屏的显示效果均一性较差的技术问题。
本申请实施例解决其技术问题提供以下技术方案：
一种柔性显示屏，包括：弯折部；所述弯折部包括行程补偿部，用于弯折或展开所述柔性显示屏时，补偿所述柔性显示屏受挤压或拉伸而产生的额外行程。
可选地，所述柔性显示屏还包括与所述弯折部两端相连接的固定部，当柔性显示屏弯折时，所述固定部长度保持不变。
可选地，所述行程补偿部包括：
至少两个岛状部；
弯折桥，所述弯折桥一端与一个所述岛状部连接，所述弯折桥另一端与另一个所述岛状部连接，所述弯折桥可弯折与伸缩。
可选地，多个所述岛状部呈阵列式排布，所述弯折桥连接于所述岛状部侧边缘的中点，当所述弯折部弯折时，任意相邻的两行或者两列岛状部保持平行。
可选地，所述弯折桥至少包括两个对称的弧状部，当所述弯折部弯折时，同一列的弯折桥的伸缩的长度相同。
可选地，所述岛状部包括基板单元和像素单元，所述像素单元设置于所述基板单元上；
所述弯折桥包括弯折单元和连接线，所述连接线设置于所述弯折单元上，所述弯折单元的两端分别固定连接于相邻的两个所述岛状部的基板单元，所述连接线的两端分别电连接于相邻的两个所述岛状部的像素单元。
可选地，所述弯折单元和所述基板单元为同一种材料。
可选地，多个所述岛状部分别沿第一方向通过所述弯折桥连接；
多个所述岛状部分别沿第二方向通过所述弯折桥连接；
所述第一方向和所述第二方向相互垂直，多个所述岛状部呈阵列式排布。
可选地，所述弯折部可沿弯折轴进行弯折；
多个所述岛状部分别沿第一方向通过所述弯折桥连接；
多个所述岛状部分别沿第二方向固定连接；
所述第一方向和所述第二方向相互垂直，且所述第一方向与所述弯折轴垂直。
可选地，所述弯折单元包括第一弯折线和第二弯折线，所述第一弯折线和所述第二弯折线相向延伸，所述第一弯折线和所述第二弯折线的中部分别开设有第一空隙和第二空隙。
可选地，所述第一弯折线和所述第二弯折线的延伸方向垂直于所述弯折部所在的平面。
可选地，所述第一弯折线和所述第二弯折线的延伸方向平行于所述弯折部所在的平面。
可选地，所述弯折单元包括多个弯折线，多个所述弯折线同向延伸，所述弯折线的中部开设有空隙。
可选地，相邻的四个所述岛状部构成一四边形，所述四边形的中心区域形成有镂空部。
可选地，还包括固定部，所述固定部连接于所述弯折部的一侧，所述弯折桥一端固定连接于所述固定部，所述弯折桥的另一端固定连接于所述岛状部。
本申请实施例解决其技术问题还提供以下技术方案：
一种显示面板，包括：第一保护层；
挤压变形层，所述挤压变形层位于所述第一保护层上；
以上所述的柔性显示屏，所述柔性显示屏位于所述挤压变形层远离所述第一保护层的一侧；
第二保护层，所述第二保护层位于所述柔性显示屏远离所述第一保护层的一侧；
压力传感器，所述压力传感器位于所述第二保护层和所述挤压变形层之间。
与现有技术相比较，在本申请实施例提供的柔性显示屏中，通过在所述弯折部上设置行程补偿部，所述行程补偿部用于弯折或展开所述柔性显示屏时，补偿所述柔性显示屏受挤压或拉伸而产生的额外行程，从而抵消柔性显示屏会受挤压或拉伸时产生的应力，提高了所述柔性显示屏在挤压或拉伸状态下的显示效果。
附图说明
为了更清楚地说明本申请实施例中的技术方案，下面将对实施例描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本申请的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的 前提下，还可以根据这些附图示出的结构获得其他的附图。
图1是本申请其中一实施例提供的一种柔性显示屏的结构示意图；
图2至图3是根据不同的一些实施例示出的柔性显示屏的结构示意图；
图4是图1所示的柔性显示屏其中一实施例的弯折桥的结构示意图；
图5是图1所示的柔性显示屏另一实施例的弯折桥的结构示意图；
图6a至图6c是图1示出的其中一实施例的柔性显示屏的制造方法在不同阶段的制备示意图；
图7a至图7c是图1示出的另一实施例的柔性显示屏的制造方法在不同阶段的制备示意图；
图8是本申请另一实施例提供的一种显示面板的结构示意图。
具体实施方式
下面将结合本申请实施例中的附图，对本申请实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本申请的一部分实施例，而不是全部的实施例。基于本申请中的实施例，本领域普通技术人员在没有作出创造性劳动前提下所获得的所有其他实施例，都属于本申请保护的范围。
除非另有定义，本文所使用的所有的技术和科学术语与属于本申请的技术领域的技术人员通常理解的含义相同。若本申请实施例中有涉及“第一”、“第二”等的描述，则该“第一”、“第二”等的描述仅用于描述目的，而不能理解为指示或暗示其相对重要性或者隐含指明所指示的技术特征的数量。由此，限定有“第一”、“第二”的特征可以明示或者隐含地包括至少一个该特征。另外，各个实施例之间的技术方案可以相互结合，但是必须是以本领域普通技术人员能够实现为基础，当技术方案的结合出现相互矛盾或无法实现时应当认为这种技术方案的结合不存在，也不在本申请要求的保护范围之内。
请参阅图1，本申请一实施例提供的一种柔性显示屏100，包括弯折部10，所述弯折部10可沿所述柔性显示屏100的弯折轴进行弯折。所述弯折部10 包括行程补偿部11，用于弯折所述柔性显示屏100时，补偿所述柔性显示屏100受挤压或拉伸而产生的额外行程。例如：如果展开状态下，柔性显示屏100是平整、弛豫的，那么在闭合时，柔性显示屏100则会受到拉伸(外弯)或挤压(内弯)应力，从而造成所述柔性显示屏100一定程度上的形变，影响显示效果，所述行程补偿部11可以用于当弯折所述柔性显示屏100时，补偿所述柔性显示屏100受挤压或拉伸而产生的额外行程，从而抵消柔性显示屏100会受到拉伸或挤压应力，提高了所述柔性显示屏100在弯折状态下的显示效果。又例如：如果弯折状态下，所述柔性显示屏100是平整、弛豫的，那么展开时，所述柔性显示屏100则受到挤压应力，从而造成所述柔性显示屏100一定程度上的形变，影响显示效果，所述行程补偿部11可以用于当展开所述柔性显示屏100时，补偿所述柔性显示屏100受挤压而产生的额外行程，从而抵消柔性显示屏100会受到的挤压应力，提高所述柔性显示屏100在展开状态下的显示效果。
请参阅图2，所述行程补偿部11包括至少两个岛状部12和弯折桥14，所述弯折桥14一端与一个所述岛状部12连接，所述弯折桥14另一端与另一个所述岛状部12连接，所述弯折桥14可弯折与伸缩。优选地，在一些实施例中，多个所述岛状部12呈阵列式排布，所述弯折桥14连接于所述岛状部12侧边缘的中点，所述弯折部10弯折时，任意相邻的两行或者两列岛状部12保持平行。
当所述柔性显示屏100弯折或展开时，所述弯折桥14会在一定程度上被弯折或拉伸，并带动所述岛状部12移动，但是岛状部12的大小和形状并不会变化，以保证当所述柔性显示屏100弯折或展开时，所述岛状部12上的基板单元122和像素单元124不会受到拉伸或挤压应力的影响，从而提高所述柔性显示屏100在弯折或展开状态下的显示效果。
在本实施例中，多个所述岛状部12分别沿第一方向L1依次通过所述弯折桥14连接；多个所述岛状部12分别沿第二方向L2依次通过所述弯折桥14 连接；所述第一方向L1和所述第二方向L2相互垂直，多个所述岛状部12呈阵列式排布。
在一些实施例中，多个所述岛状部12分别沿第一方向L1依次通过所述弯折桥14连接；多个所述岛状部12依次沿第二方向L2固定连接；所述第一方向L1和所述第二方向L2相互垂直，且所述第一方向L1与所述弯折轴垂直。
所述岛状部12的截面形状为矩形或近似矩形。在一些实施例中，所述岛状部12的截面形状还可以为三角形、圆形、菱形、五边形和六边形等等。
相邻的四个所述岛状部12构成一四边形，所述四边形的中心区域形成有镂空部16，优选地，所述四边形的其中一个对角线的两端分别设置有所述岛状部12，所述四边形的另一对角线的两端分别设置有所述岛状部12，所述四边形的两个所述对角线相互垂直。所述镂空部16能够在所述所述柔性显示屏100弯折时，更好的补偿所述柔性显示屏100受弯折应力而产生的额外行程，从而抵消柔性显示屏100会受到的应力，提高所述柔性显示屏100在弯折状态下的显示效果。
请参阅图3，所述岛状部12包括基板单元122和像素单元124，所述像素单元124设置于所述基板单元122上。所述基板单元122承载有一个或多个所述像素单元124，当所述基板单元122承载有多个所述像素单元124，所述像素单元124间隔预设距离设置于所述基板单元122上。
所述基板单元122的截面形状为矩形或近似矩形。在一些实施例中，所述岛状部12的截面形状还可以为三角形、圆形、菱形、五边形和六边形等等。
所述基板单元122作为载体，用于支承所述像素单元124。在本实施例中，所述基板单元122采用的是二层型挠性覆铜板(简称“2L-FCCL”)，是由挠性绝缘基膜与金属箔组成的，所述挠性绝缘基膜采用的是聚酰亚胺薄膜，其是由均苯四甲酸二酐(PMDA)和二胺基二苯醚(DDE)在强极性溶剂中经缩聚并流延成膜再经亚胺化而成，所述金属箔采用的是铜箔。所述二层型挠性覆铜板弯折曲率半径为到3mm以下,其具有优良的柔韧性；所述二层型挠性覆铜板的 热膨胀系数小于7×10 －6℃ －1，其具有良好的耐热稳定性；所述二层型挠性覆铜板水汽穿透率(WaterVaporTransmissionRate，简称WVTR)小于1×10 －6g/(m 2·d)以及氧气穿透率(Oxygen Transmission Rale,简称OTR)小于1×10 －5g/(m 2·d)，其具有良好的阻水阻氧能力；所述二层型挠性覆铜板表面粗糙度小1nm，其不仅能具有多层结构的完整性，而且在器件弯曲时不易产生裂纹，器件寿命高。
在一些实施例中，所述挠性绝缘基膜可采用其他种类的柔性材料，例如聚酯和聚萘酯等，所述金属箔也可根据需要采用其他种类的金属材料，例如铝箔、复合金属箔等。
在一些实施例中，所述基板单元122也可根据需要采用其他种类的柔性材料，例如：热塑性半结晶聚合物，如PI、PET、PEN和PEEK，其具有良好的透明度、较低的热膨胀系数、良好的阻水阻氧能力，而且价格比较便宜；非结晶热塑性聚合物，如PC、PES，其由溶剂注造或熔融注塑而成，具有较好的光学透明度和较高的玻璃化转变温度，当PC、PES薄膜的厚度达到0.1mm时，在可见光范围内的透过率可以达到85％以上。
所述像素单元124包括驱动电路、像素电极、有机发光元件、公共电极、栅极线和数据线等，所述驱动电路包括位于岛状部12上的薄膜晶体管，所述薄膜晶体管的漏极与所述像素电极相连，所述像素电极与所述有机发光元件的一侧电连接，所述有机发光元件相对的另一侧与所述公共电极电连接。栅极线向驱动电路传输扫描信号、数据线向驱动电路传输数据信号后，驱动电路通过导通的薄膜晶体管和像素电极向有机发光元件提供电流，以使有机发光元件发光、进行画面的显示。
在本实施例中，所述像素单元124与所述基板单元122之间采用非导电胶(NCA)技术封装，所述非导电胶是不含导电颗粒的材料，可采用非导电胶(NCP)和非导电膜(NCF)两种类型，在本实施例中，所述非导电胶采用的是非导电膜，所述非导电膜被贴合于所述像素单元124与所述基板单元122 之间，加压使像素单元124凸点穿透其正下方的所述非导电膜而与对应的基板单元122线路直接接触，由此实现电连接。所述非导电膜受热固化，其收缩可以固定像素单元124凸点和印制线间的直接接触。所述非导电膜在一定温度下的固化收缩不仅能保证了像素单元124和基板单元122之间稳定的电连接，还提供了一定的机械连接，从这两方面保证了封装体良好的键合性能。
请继续参阅图3，所述弯折桥14包括弯折单元142和连接线144，所述连接线144设置于所述弯折单元142上，所述弯折单元142的两端分别固定连接于相邻的两个所述岛状部12的基板单元122，所述连接线144的两端分别电连接于相邻的两个所述岛状部12的像素单元124。
在本实施例中，所述弯折单元142为弹簧状，使所述弯折单元142可弯折与伸缩，同时所述弯折单元142的材料与所述基板单元122采用同一种材料，使其在制备所述弯折单元142和基板单元122的过程中，可采用一次光刻掩膜工艺制备而成，简化了制备流程，提高了制备效率。
请参阅图4，在本实施例中，所述弯折单元142包括若干第一弯折线1442和若干第二弯折线1444，所述第一弯折线1442和所述第二弯折线1444相向延伸，所述第一弯折线1442的两端分别固定连接相邻的两个所述第二弯折线1444，所述第二弯折线1444的两端分别固定连接相邻的两个所述第一弯折线1442，使其所述弯折单元142呈弹簧状。所述弯折单元142两侧的第一弯折线1442或第二弯折线1444的一端分别固定连接于所述基板单元122。
同时所述第一弯折线1442和所述第二弯折线1444的中部分别开设有第一空隙1443和第二空隙1445，使所述柔性显示屏100受挤压或拉伸时，所述第一弯折线1442和所述第二弯折线1444具有更好的伸缩性，补偿所述柔性显示屏100受挤压而产生的额外行程，从而抵消柔性显示屏100会受到的挤压应力，提高所述柔性显示屏100在展开状态下的显示效果。
在本实施例中，所述第一弯折线1442和所述第二弯折线1444的延伸方向垂直于所述弯折部10所在的平面。
请参阅图5，在一些实施例中，所述第一弯折线1442和所述第二弯折线1444的延伸方向平行于所述弯折部10所在的平面。
在一些实施例中，所述弯折单元142包括多个弯折线，多个所述弯折线同向延伸，其中一个所述弯折线的两端分别固定连接相邻的两个所述弯折线，使其所述弯折单元142呈弹簧状。所述弯折单元142两侧的所述弯折线的一端分别固定连接于所述基板单元122。
同时所述弯折线的中部开设有空隙，使所述柔性显示屏100受到挤压或拉伸时，所述弯折线具有更好的伸缩性，补偿所述柔性显示屏100受挤压而产生的额外行程，从而抵消柔性显示屏100会受到的挤压应力，提高所述柔性显示屏100在展开状态下的显示效果。
在一些实施例中，所述弯折单元142的形状可根据需要设置，只需使所述弯折单元142可弯折与伸缩即可，例如所述弯折单元142的形状可为直线形和其他曲线形状等等。
在一些实施例中，所述弯折桥14至少包括两个对称的弧状部，对称的弧状部在弯折时均匀受力以使所述弯折部10弯折时，同一列的弯折桥14的伸缩的长度相同。
在一些实施例中，相邻的两个所述岛状部12之间的所述弯折单元142的数量可根据需要设置，例如相邻的两个所述岛状部12之间的设置有若干所述弯折单元142，若干所述弯折单元142间隔预设距离设置，且每个所述弯折单元142的两端分别固定连接于相邻的两个所述岛状部12。
在一些实施例中，所述柔性显示屏100还包括与所述弯折部10两端相连接的固定部20，当柔性显示屏100弯折时，所述固定部20长度保持不变。具体地，所述弯折桥14一端固定连接于所述固定部20，所述弯折桥14的另一端固定连接于所述岛状部12。
所述弯折部10和所述固定部20的区别在于，所述固定部20的岛状部12不通过所述弯折桥14进行连接，而是所述固定部20的相邻的两个岛状部12 直接固定连接在一起，且所述连接线144设置于所述基板单元122上。
在一些实施例中，所述柔性显示屏100还包括还电极层和控制单元，所述电极层包括至少一个第一子电极和至少一个第二子电极，第一子电极与第二子电极绝缘，且均位于岛状部12上。一个岛状部12上可以同时具有第一子电极和第二子电极，也可以一个岛状部12上只具有第一子电极，另一个岛状部12上只具有第二子电极。但是，无论一个岛状部12上是否同时具有第一子电极和第二子电极，至少一列岛状结构上的第一子电极依次电连接构成一个第一电极，至少一行岛状部12上的第二子电极依次电连接构成一个第二电极。其中，为了保证触摸检测精度以及拉伸检测精度，一列岛状部12上的第一子电极依次电连接构成一个第一电极，一行岛状部12上的第二子电极依次电连接构成一个第二电极。
所述控制单元与第一电极和第二电极电连接。该控制单元根据第一电极和第二电极的电容变化确定触摸位置和/或可拉伸面板的拉伸状态。
本申请其中一个实施例提供一种柔性显示屏100的制造方法，需要说明的是，上述对柔性显示屏100的实施例的解释说明也适用于本实施例的柔性显示屏100的制备方法，为避免冗余，在此不再详细展开。
需要说明的是，在下述各个实施例中，下述各步骤之间并不必然存在一定的先后顺序，本领域普通技术人员，根据本申请实施例的描述可以理解，不同实施例中，下述各步骤可以有不同的执行顺序，亦即，可以并行执行，亦可以交换执行等等；不同实施例中，下述有些步骤亦可以省略或被代替。
所述柔性显示屏100的制造方法包括：
步骤S61:提供一基板。
请参阅图6a,具体地，所述基板20与所述基板单元122使用的材料相同，例如所述基板20的材料可为是聚酰亚胺(PI)、聚碳酸酯(PC)或聚对苯二甲酸乙二醇酯(PET)等。
步骤S62:对所述基板进行图案化处理以形成所述基板单元和弯折单元。
请参阅图6b,具体地，所述图案化处理可只包括光刻工艺，或包括光刻工艺以及刻蚀步骤，同时还可以包括打印、喷墨等其他用于形成预定图形的工 艺；光刻工艺，是指包括成膜、曝光、显影等工艺过程的利用光刻胶、掩模板、曝光机等形成图形的工艺。可根据本申请实施例中所形成的结构选择相应的构图工艺。
在本实施例中，在所述基板20上形成一层光刻胶，对光刻胶进行曝光和显影，然后对所述基板20进行干法刻蚀，以同时形成所述基板单元122和弯折单元142。
步骤S63:在所述基板单元和所述弯折单元上分别同时形成像素单元和连接线。
请参阅图6c,具体地，在基板单元122上形成像素单元124，所述像素单元124与所述基板单元122之间采用非导电胶(NCA)技术封装，所述像素单元124包括驱动电路、像素电极、有机发光元件、公共电极、栅极线和数据线等，所述驱动电路包括位于岛状部12上的薄膜晶体管，所述薄膜晶体管的漏极与所述像素电极相连，所述像素电极与所述有机发光元件的一侧电连接，所述有机发光元件相对的另一侧与所述公共电极电连接。栅极线向驱动电路传输扫描信号、数据线向驱动电路传输数据信号后，驱动电路通过导通的薄膜晶体管和像素电极向有机发光元件提供电流，以使有机发光元件发光、进行画面的显示。所述像素单元124的制备过程属于现有技术，在此不再赘述。
本申请另一实施例提供一种柔性显示屏100的制造方法，需要说明的是，上述对柔性显示屏100的实施例的解释说明也适用于本实施例的柔性显示屏100的制备方法，为避免冗余，在此不再详细展开。
所述柔性显示屏100的制造方法包括：
步骤S71:提供一基板。
请参阅图7a,具体地，所述基板20与所述基板单元122使用的材料相同，例如所述基板20的材料可为是聚酰亚胺(PI)、聚碳酸酯(PC)或聚对苯二甲酸乙二醇酯(PET)等。
步骤S72:在所述基板上分别形成像素和连接线144。
请参阅图7b,具体地，在基板20上形成像素30，所述像素30与所述基 板20之间采用非导电胶(NCA)技术封装，所述像素30包括多个驱动电路、多个像素电极、多个有机发光元件、多个公共电极、多个栅极线和多个数据线等，所述驱动电路包括位于岛状部12上的薄膜晶体管，所述薄膜晶体管的漏极与所述像素电极相连，所述像素电极与所述有机发光元件的一侧电连接，所述有机发光元件相对的另一侧与所述公共电极电连接。栅极线向驱动电路传输扫描信号、数据线向驱动电路传输数据信号后，驱动电路通过导通的薄膜晶体管和像素电极向有机发光元件提供电流，以使有机发光元件发光、进行画面的显示。所述像素30的制备过程属于现有技术，在此不再赘述。
步骤S73:对所述基板、所述像素和连接线同时进行图案化处理以形成基板单元、像素单元和弯折单元。
请参阅图7c,具体地，所述图案化处理可只包括光刻工艺，或包括光刻工艺以及刻蚀步骤，同时还可以包括打印、喷墨等其他用于形成预定图形的工艺；光刻工艺，是指包括成膜、曝光、显影等工艺过程的利用光刻胶、掩模板、曝光机等形成图形的工艺。可根据本申请实施例中所形成的结构选择相应的构图工艺。
在本实施例中，在所述基板、所述像素和连接线144上形成一层光刻胶，对光刻胶进行曝光和显影，然后对所述基板、所述像素和连接线144上进行干法刻蚀，以同时形成所述基板单元122、像素单元124和弯折单元142。
请参阅图8，本申请另一实施例还提供一种显示面板200，包括：第一保护层21、挤压变形层22、上述任一实施例中的柔性显示屏100，第二保护层24和压力传感器；挤压变形层22位于第一保护层21上；柔性显示屏100位于挤压变形层22远离第一保护层21的一侧；第二保护层24位于柔性显示屏100远离第一保护层21的一侧；压力传感器位于第二保护层24和挤压变形层22之间。
将压力传感器设置在柔性显示屏100和第二保护层24之间后，在柔性显示面板200发生弯折时，第一保护层21弯曲并挤压挤压变形层22，弯折区域对应的挤压变形层22会被压缩，此时挤压变形层22将弯折柔性显示面板200 时的形变力转变为了挤压力，并通过柔性显示屏100将挤压力传递到压力传感器上，并且柔性显示面板200弯折的程度越大，则传递至压力传感器上的力也就越大，用户可以根据压力传感器检测到的力的大小调整柔性显示面板200的弯折程度，使柔性显示面板200的弯折处受到的力保持在一定范围内，从而在一定程度上提高了柔性显示面板200的使用安全性。其中，第一保护层21还用于保护挤压变形层22不被损坏，第二保护层24用于保护压力传感器不被损坏，该第二保护层24还能够起到保护柔性显示屏100的作用。并且，由于挤压变形层22在力的作用下能够发生形变，因此当柔性显示面板200中设置有第一保护层21的一侧受到撞击时，挤压变形层22能够发生形变，起到缓冲的作用，进而降低了柔性显示面板200收到撞击时损坏的概率。
与现有技术相比较，本申请显示面板中提供了一种柔性显示屏，所述柔性显示屏包括所述弯折部，所述弯折部包括行程补偿部，用于弯折或展开所述柔性显示屏时，补偿所述柔性显示屏受挤压或拉伸而产生的额外行程，从而抵消柔性显示屏会受挤压或拉伸时产生的应力，提高了所述柔性显示屏在挤压或拉伸状态下的显示效果。
最后应说明的是：以上实施例仅用以说明本申请的技术方案，而非对其限制；在本申请的思路下，以上实施例或者不同实施例中的技术特征之间也可以进行组合，步骤可以以任意顺序实现，并存在如上所述的本申请的不同方面的许多其它变化，为了简明，它们没有在细节中提供；尽管参照前述实施例对本申请进行了详细的说明，本领域的普通技术人员应当理解：其依然可以对前述各实施例所记载的技术方案进行修改，或者对其中部分技术特征进行等同替换；而这些修改或者替换，并不使相应技术方案的本质脱离本申请各实施例技术方案的范围。

Claims (15)

  1. 一种柔性显示屏，包括弯折部，其特征在于，所述弯折部包括行程补偿部，用于弯折或展开所述柔性显示屏时，补偿所述柔性显示屏受挤压或拉伸而产生的额外行程。
  2. 根据权利要求1所述的柔性显示屏，其特征在于，
    所述柔性显示屏还包括与所述弯折部两端相连接的固定部，当柔性显示屏弯折时，所述固定部长度保持不变。
  3. 根据权利要求1所述的柔性显示屏，其特征在于，所述行程补偿部包括：
    至少两个岛状部；
    弯折桥，所述弯折桥一端与一个所述岛状部连接，所述弯折桥另一端与另一个所述岛状部连接，所述弯折桥可弯折与伸缩。
  4. 根据权利要求3所述的柔性显示屏，其特征在于，
    多个所述岛状部呈阵列式排布，所述弯折桥连接于所述岛状部侧边缘的中点，当所述弯折部弯折时，任意相邻的两行或者两列岛状部保持平行。
  5. 根据权利要求4所述的柔性显示屏，其特征在于，
    所述弯折桥至少包括两个对称的弧状部，当所述弯折部弯折时，同一列的弯折桥的伸缩的长度相同。
  6. 根据权利要求3所述的柔性显示屏，其特征在于，
    所述岛状部包括基板单元和像素单元，所述像素单元设置于所述基板单元上；
    所述弯折桥包括弯折单元和连接线，所述连接线设置于所述弯折单元上，所述弯折单元的两端分别固定连接于相邻的两个所述岛状部的基板单元，所述连接线的两端分别电连接于相邻的两个所述岛状部的像素单元。
  7. 根据权利要求6所述的柔性显示屏，其特征在于，
    所述弯折单元和所述基板单元为同一种材料。
  8. 根据权利要求7所述的柔性显示屏，其特征在于，
    多个所述岛状部分别沿第一方向通过所述弯折桥连接；
    多个所述岛状部分别沿第二方向通过所述弯折桥连接；
    所述第一方向和所述第二方向相互垂直，多个所述岛状部呈阵列式排布。
  9. 根据权利要求7所述的柔性显示屏，其特征在于，
    所述弯折部可沿弯折轴进行弯折；
    多个所述岛状部分别沿第一方向通过所述弯折桥连接；
    多个所述岛状部分别沿第二方向固定连接；
    所述第一方向和所述第二方向相互垂直，且所述第一方向与所述弯折轴垂直。
  10. 根据权利要求6-9任一项所述的柔性显示屏，其特征在于，
    所述弯折单元包括第一弯折线和第二弯折线，所述第一弯折线和所述第二弯折线相向延伸，所述第一弯折线和所述第二弯折线的中部分别开设有第一空隙和第二空隙。
  11. 根据权利要求10所述的柔性显示屏，其特征在于，
    所述第一弯折线和所述第二弯折线的延伸方向垂直于所述弯折部所在的平面。
  12. 根据权利要求10所述的柔性显示屏，其特征在于，
    所述第一弯折线和所述第二弯折线的延伸方向平行于所述弯折部所在的平面。
  13. 根据权利要求6-9任一项所述的柔性显示屏，其特征在于，
    所述弯折单元包括多个弯折线，多个所述弯折线同向延伸，所述弯折线的中部开设有空隙。
  14. 根据权利要求3所述的柔性显示屏，其特征在于，
    相邻的四个所述岛状部构成一四边形，所述四边形的中心区域形成有镂空部。
  15. 一种显示面板，其特征在于，包括：
    第一保护层；
    挤压变形层，所述挤压变形层位于所述第一保护层上；
    如权利要求1至14任一项所述的柔性显示屏，所述柔性显示屏位于所述挤压变形层远离所述第一保护层的一侧；
    第二保护层，所述第二保护层位于所述柔性显示屏远离所述第一保护层的一侧；
    压力传感器，所述压力传感器位于所述第二保护层和所述挤压变形层之间。
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