Flexible display panel and electronic device

Abstract

A flexible display panel and an electronic device, the flexible display panel comprising an array substrate, an opposite substrate and a first capsule box, the array substrate being a flexible structure, the opposite substrate being opposite to the array substrate in a first direction, the opposite substrate being a flexible structure, the first capsule box being arranged between the array substrate and the opposite substrate, and a plurality of microcapsules being arranged in the first capsule box, wherein the flexible display panel has a foldable area, the array substrate and the opposite substrate are bendable in the foldable area, and the first capsule box is located in the foldable area. The flexible display panel in the application has high display uniformity.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of flexible display panels, in particular to a flexible display panel and an electronic device. BACKGROUND

[0002] A flexible display panel is an ultra-thin and ultra-light display screen, and its main working principle is to drive particles to move for color display through the upper and lower two layers of pixel electrodes and common electrodes on the array substrate and the electronic film. This display technology has the advantages of bright colors and high resolution, and is widely used in various electronic devices. In recent years, with the development of technology, flexible display panels have also begun to develop in the direction of flexibility, i.e., flexible display panels that can be bent and folded.

[0003] In the prior art, the microcapsules in the foldable area of the flexible and foldable flexible display panel will move and accumulate to the two sides of the flexible display panel, thereby causing uneven display. SUMMARY

[0004] The purpose of the present application is to provide a flexible display panel and an electronic device to solve the problem of uneven display of the flexible display panel.

[0005] To achieve the purpose of the present application, the present application provides the following technical solutions:

[0006] In a first aspect, the present application provides a flexible display panel, comprising an array substrate, an opposite substrate and a first capsule box, the opposite substrate is opposite to the array substrate in a first direction, the first capsule box is arranged between the array substrate and the opposite substrate, and the first capsule box has a plurality of microcapsules therein; wherein the flexible display panel has a foldable area, the array substrate and the opposite substrate are bendable in the foldable area, and the first capsule box is located in the foldable area.

[0007] In an embodiment, the first capsule box has a first opening and a second opening opposite to each other in a second direction, the flexible display panel further comprises a first spacing column and a second spacing column, the first spacing column is arranged at the first opening, the second spacing column is arranged at the second opening, the first spacing column and the second spacing column are both deformable structures, and the second direction intersects the first direction.

[0008] In an embodiment, the flexible display panel has a minimum folding angle A1 and a maximum folding angle A2; the folding angle of the flexible display panel is A, when A=A1, the flexible display panel is in a flat state, and the first opening and the second opening are in an open state, when A is greater than A1 and less than A2, the first spacer column and the second spacer column are deformed to make the first opening and the second opening in a closed state, and when A=A2, the first opening and the second opening are in an open state.

[0009] In an embodiment, the flexible display panel further has an intermediate folding angle A3, which satisfies A1

[0010] In an embodiment, the flexible display panel is further provided with a pressure sensor, which is used to detect the pressure applied by the first capsule box when the flexible display panel is bent, and the pressure detected by the pressure sensor is used to control the deformation of the first spacer column and the second spacer column.

[0011] In an embodiment, the pressure sensor includes a first pressure sensor and a second pressure sensor, both of which are arranged on the array substrate, the first pressure sensor is connected with the side of the first capsule box in which the first opening is formed, and the second pressure sensor is connected with the side of the first capsule box in which the second opening is formed.

[0012] In an embodiment, the array substrate and the opposite substrate further form a first adjusting space and a second adjusting space, the first adjusting space is located on the side of the first capsule box in which the first opening is formed, and the second adjusting space is located on the side of the first capsule box in which the second opening is formed, the first adjusting space is in communication with the first opening, and the second adjusting space is in communication with the second opening; when A is greater than A3 and less than or equal to A2, the first spacer column and the second spacer column are deformed to make the first opening and the second opening in an open state, at least part of the microcapsules in the first capsule box flow between the first capsule box and the first adjusting space through the first opening, and flow between the first capsule box and the second adjusting space through the second opening.

[0013] In one embodiment, the flexible display panel further comprises a second capsule and a third capsule, the second capsule and the third capsule are both arranged between the array substrate and the opposite substrate, the second capsule is arranged apart from the first capsule, and a space between the second capsule and the first capsule forms the first adjusting space, the third capsule is arranged apart from the first capsule, and a space between the third capsule and the first capsule forms the second adjusting space, and the second capsule and the third capsule each have a plurality of microcapsules.

[0014] In one embodiment, the second capsule has a third opening opposite to the first opening, and the first adjusting space is in communication with the first opening and the third opening; and the third capsule has a fourth opening opposite to the second opening, and the second adjusting space is in communication with the second opening and the fourth opening.

[0015] In a second aspect, the present application further provides an electronic device comprising a shell and the flexible display panel according to any one of the embodiments of the first aspect, and the flexible display panel is accommodated in the shell.

[0016] By arranging the first capsule between the array substrate and the opposite substrate, the first capsule is located in the foldable area of the flexible display panel, and the movement of the microcapsules in the first capsule is limited by the first capsule, so that the movement of the microcapsules in the foldable area to the edge of the flexible display panel can be inhibited, thereby ensuring the uniformity of the density of the microcapsules in the flexible display panel, and further improving the display uniformity of the flexible display panel and the display effect. BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without any creative effort on the basis of these drawings.

[0018] Figure 1 is a partial schematic view of a flexible display panel of an embodiment;

[0019] Figure 2 is a partial schematic view of a flexible display panel of an embodiment in a bending state;

[0020] Figure 3 is a partial schematic view of a flexible display panel of an embodiment in another bending state;

[0021] Figure 4 is a schematic view of a flexible display panel of an embodiment;

[0022] Figure 5 FIG. 1 is a schematic diagram of an electronic device according to an embodiment.

[0023] Reference Signs List:

[0024] 1000 - electronic device

[0025] 100 - flexible display panel, 10 - array substrate, 11 - flexible substrate, 12 - active switch layer, 13 - pixel electrode layer, 20 - counter substrate, 21 - counter substrate, 22 - common electrode, 30 - first capsule, 31 - first opening, 32 - second opening, 40 - microcapsule, 51 - foldable area, 52 - first connection area, 53 - second connection area, 61 - first spacer column, 62 - second spacer column, 70 - pressure sensor, 81 - first adjustment space, 82 - second adjustment space, 91 - second capsule, 911 - third opening, 92 - third capsule, 921 - fourth opening

[0026] 200 - housing

[0027] X - first direction, Y - second direction DETAILED DESCRIPTION

[0028] The technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, but not all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present application.

[0029] It should be noted that when a component is referred to as being "fixed" to another component, it can be directly on the other component or there can be an intervening component. When a component is referred to as being "connected" to another component, it can be directly connected to the other component or there can be an intervening component.

[0030] Unless otherwise defined, 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. The terminology used in the description of the application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The use of the terms "and / or" includes a combination of one or more of the associated listed items.

[0031] Some embodiments of the present application will be described in detail below with reference to the drawings. The following embodiments and features of the embodiments can be combined with each other in the case of no conflict.

[0032] Reference will be made to Figure 1The embodiment of the present application provides a flexible display panel 100, which comprises an array substrate 10, a counter substrate 20 and a first capsule box 30.

[0033] First, define the direction. Please refer to Figure 1 X is the first direction, Y is the second direction, the first direction X intersects with the second direction Y. Optionally, the first direction X is perpendicular to the second direction Y. Optionally, when the flexible display panel 100 is in an unfolded state without being bent and folded, the first direction X is the thickness direction of the flexible display panel 100.

[0034] The array substrate 10 is a flexible structure, the counter substrate 20 is opposite to the array substrate 10 in the first direction X, the counter substrate 20 is a flexible structure, the first capsule box 30 is arranged between the array substrate 10 and the counter substrate 20, and a plurality of microcapsules 40 are arranged in the first capsule box 30.

[0035] Please refer to Figure 1 The array substrate 10 comprises a flexible substrate 11 and an active switch layer 12 arranged on the flexible substrate 11, and the flexible substrate 11 can be made of a polymer material or an inorganic non-metal material. Optionally, the active switch layer 12 comprises a first metal layer, a first insulating layer, a semiconductor layer, a second metal layer and a second insulating layer which are arranged on the flexible substrate 11 in a stack. A plurality of active switches are formed in the active switch layer 12, and the active switch can be a top gate structure or a bottom gate structure. The embodiment of the present application takes the bottom gate structure as an example for explanation and description, the first metal layer comprises a gate and a common electrode, the second metal layer comprises a source and a drain, and the gate, the semiconductor layer, the source and the drain constitute the active switch.

[0036] Optionally, the array substrate 10 further comprises a pixel electrode layer 13 arranged on the active switch layer 12. Optionally, the materials of the first metal layer, the second metal layer and the pixel electrode layer 13 can be Al, Cu, Ag and the like. The material adopted should avoid the fact that the pixel electrode layer 13 of the flexible display panel 100 is not flexible enough and cracks in the foldable area 51, and the specific limitation is not made. When the pixel electrode layer 13 is prepared, a protective layer (not shown in the figure) can be arranged on the surface of the pixel electrode layer 13, so as to protect the pixel electrode layer 13. The material of the protective layer comprises Al2O3, Mo and the like, and the limitation is not made. Optionally, the orthographic projection of the pixel electrode on the flexible substrate 11 covers the orthographic projection of the active switch on the flexible substrate 11, so as to avoid the fact that the light irradiates the source and the drain of the active switch to generate photoelectric current. Optionally, the pixel electrode layer 13 comprises a plurality of pixel electrodes, the plurality of pixel electrodes correspond to the plurality of active switches one by one, and one pixel electrode corresponds to one pixel unit.

[0037] The opposite substrate 20 includes an opposite substrate 21 and a common electrode 22 disposed on the opposite substrate 21. The opposite substrate 21 is also a flexible substrate. The common electrode 22 can be made of Al, Cu, Ag, or the like.

[0038] Optionally, the first capsule box 30 is connected with the array substrate 10 and the opposite substrate 20 respectively at two opposite sidewalls in the first direction. The first capsule box 30 can be made of a material with certain elasticity and strength, such as polymethyl methacrylate (PMMA) or the like. The thickness of the first capsule box 30 can be about 0.2 mm to 0.7 mm, and can be 0.2 mm, 0.3 mm, 0.4 mm, 0.5 mm, 0.6 mm, 0.7 mm, or the like. The first capsule box 30 can contain electrophoretic coating liquid and a plurality of microcapsules 40 uniformly distributed in the electrophoretic coating liquid.

[0039] The microencapsulated electrophoretic display technology uses the electrophoretic display principle to encapsulate pigment particles and a deep dye solution in a capsule, and realizes electrophoretic display in the capsule, thereby suppressing the agglomeration and deposition of electrophoretic particles in a range larger than the size of the capsule, improving the stability, and prolonging the service life.

[0040] The capsule wall of the microcapsule includes gelatin and a negatively charged polymer material. The negatively charged polymer material is well known to those skilled in the art, and any negatively charged polymer material that can form a capsule wall with gelatin can be used without limitation. The microcapsule contains a suspension and a plurality of charged pigment particles dispersed in the suspension. The charged pigment particles can be inorganic particles and / or organic particles. The inorganic particles can be one or more of titanium dioxide, zinc white, and cadmium yellow. The organic particles can be one or more of large red powder, toluidine red, titanium cyanin blue, and pigment yellow, without limitation. When the flexible display panel 100 is black and white, the charged pigment particles include black electrophoretic particles and white electrophoretic particles. When the flexible display panel 100 is color, the charged pigment particles include color electrophoretic particles.

[0041] The solvent in the suspension is an organic solvent. The organic solvent can be an epoxy compound (such as epoxy decane), an aromatic compound (such as toluene, naphthalene), a halogenated hydrocarbon (such as tetrachloroethylene), and an oligomer thereof (such as polytrichloroethylene with a polymerization degree of 2-10). Fluorine-containing (or perfluorinated) organic solvents are more suitable as the solution of the suspension because of their larger density, good chemical stability, and environmental friendliness. Further specifically, the suspension can further include a charge control agent. The charge control agent can be an organic sulfate (calcium dodecylbenzenesulfonate, barium dinonylnaphthalene sulfonate, etc.), a metal soap, an organic amine, an organic phosphate, or a phosphoric acid ester, etc. In order to enhance the efficiency of the charge control agent, a certain amount of a charge auxiliary agent, such as a polyhydroxy compound or an amino alcohol compound, can also be added to the suspension.

[0042] The microcapsules 40 can be stably dispersed in the first capsule box 30 by an electrophoretic coating liquid. The electrophoretic coating liquid contains a resin monomer and / or an unsaturated resin, and one end of the alkenal compound reacts with the gelatin in the capsule wall of the microcapsules 40, and the other end reacts with the double bond in the resin monomer and / or the unsaturated resin, forming a firm molecular structure, so that the microcapsules 40 are stably dispersed in the first capsule box 30.

[0043] The flexible display panel 100 has a foldable area 51, and the array substrate 10 and the opposite substrate 20 can be bent in the foldable area 51. The first capsule box 30 is located in the foldable area 51.

[0044] The foldable area 51 includes a folding line of the flexible display panel 100 and a partial area located on both sides of the folding line. Optionally, in the orthographic projection of the first direction X, the first capsule box 30 can coincide with the foldable area 51, or the first capsule box 30 is located in the foldable area 51, or the foldable area 51 is located in the first capsule box 30, and the above manners are all acceptable and are not limited.

[0045] Optionally, the number of the foldable areas 51 can be one or more, and is not limited. For example, the flexible display panel 100 is a single-fold flexible display panel 100, and the flexible display panel 100 can be folded horizontally or vertically in the foldable area 51; or the flexible display panel 100 is a three-fold flexible display panel 100, and the foldable area 51 is two, and the flexible display panel 100 can be folded in both foldable areas 51. The number of the first capsule boxes 30 corresponds to the number of the foldable areas 51, and is not limited.

[0046] For the existing bendable and foldable flexible display panel 100, the bending of the curved flexible display panel 100 can cause the microcapsules 40 at the arc top of the flexible display panel 100 to move to the edge position, resulting in a low density of the microcapsules 40 at the middle position (i.e., the foldable position) of the flexible display panel 100 and a high density of the microcapsules 40 at the edge position. Since the flexible display panel 100 displays by reflecting ambient light during display, the low density of the microcapsules 40 at the middle position leads to a low corresponding brightness and a low resolution, and the high density of the microcapsules 40 at the edge position leads to a high corresponding brightness, which causes the display of the flexible display panel 100 to be non-uniform.

[0047] Therefore, in the embodiments of the present application, the first capsule box 30 is arranged between the array substrate 10 and the opposite substrate 20, the first capsule box 30 is located in the foldable area 51 of the flexible display panel 100, the movement of the microcapsules 40 in the first capsule box 30 is limited by the first capsule box 30, the movement of the microcapsules 40 in the foldable area 51 to the edge position of the flexible display panel 100 can be inhibited, the uniformity of the density of the microcapsules 40 of the flexible display panel 100 is ensured, and the display uniformity of the flexible display panel 100 is improved, and the display effect is good.

[0048] In an embodiment, referring to Figure 1 , the first capsule box 30 has a first opening 31 and a second opening 32 opposite in the second direction Y, and the flexible display panel 100 further includes a first spacing column 61 and a second spacing column 62, the first spacing column 61 is arranged at the first opening 31, and the second spacing column 62 is arranged at the second opening 32, and the first spacing column 61 and the second spacing column 62 are both deformable structures.

[0049] The size of the first spacing column 61 and the second spacing column 62 in the first direction X can change, that is, the first spacing column 61 and the second spacing column 62 can be elongated or shortened in the first direction X. Optionally, the maximum size of the first spacing column 61 in the first direction X is greater than the size of the first opening 31 in the first direction X, and the maximum size of the second spacing column 62 in the first direction X is greater than the size of the second opening 32 in the first direction X, so as to close the first opening 31 and the second opening 32.

[0050] The first spacing column 61 and the second spacing column 62 can be arranged on the array substrate 10 or the opposite substrate 20. Optionally, the first spacing column 61 and the second spacing column 62 can be a thermal deformation structure, a magnetostrictive structure, a mechanical expansion structure, etc., or any other feasible deformable structure, and the specific structure is not limited. For example, the first spacing column 61 and the second spacing column 62 adopt a magnetic material with a magnetostrictive effect, when magnetized by an external magnetic field, the internal magnetic domains will rearrange, causing the first spacing column 61 and the second spacing column 62 to slightly elongate or shorten in the magnetization direction; or the first spacing column 61 and the second spacing column 62 adopt a thermal deformation material with a thermal expansion and contraction effect, and the elongation or shortening of the first spacing column 61 and the second spacing column 62 is controlled by heating or cooling, and the specific structure is not limited.

[0051] By arranging the first spacing column 61 and the second spacing column 62, the first spacing column 61 can be used to close the first opening 31 of the first capsule box 30, and the second spacing column 62 can close the second opening 32, so as to inhibit the movement of the microcapsules 40 in the first capsule box 30 to the edge position of the flexible display panel 100, thereby improving the display uniformity of the flexible display panel 100.

[0052] In one embodiment, as shown in FIGS. 1A and 1B, the flexible display panel 100 has a minimum folding angle A1 and a maximum folding angle A2, and the folding angle of the flexible display panel 100 is A. Figure 1 , Figure 2 , Figure 3 and Figure 4 , the flexible display panel 100 has a minimum folding angle A1 and a maximum folding angle A2, and the folding angle of the flexible display panel 100 is A.

[0053] Optionally, the flexible display panel 100 further comprises a first connecting area 52 and a second connecting area 53, the first connecting area 52 is connected to one side of the foldable area 51, and the second connecting area 53 is connected to the side of the foldable area 51 opposite to the first connecting area 52, and the included angle between the second connecting area 53 and the first connecting area 52 is A (i.e. the folding angle of the foldable area 51 of the flexible display panel 100).

[0054] When A = A1, the flexible display panel 100 is in a flat state, and the first opening 31 and the second opening 32 are in an open state. When A = A1 = 0°, as shown in FIG. 1A, the flexible display panel 100 is in an unfolded state (i.e. a flat state), and at this time the flexible display panel 100 is a flat panel, and the first opening 31 and the second opening 32 are in an open state, so that the microcapsules 40 in the first capsule box 30 can flow freely between the array substrate 10 and the opposite substrate 20. Figure 1

[0055] When A is greater than A1 and less than A2, both the first spacing column 61 and the second spacing column 62 deform to make the first opening 31 and the second opening 32 in a closed state. When A = A2, i.e. the display panel 100 is bent to the maximum bending angle, the first opening 31 and the second opening 32 are in an open state.

[0056] Optionally, the value of A1 can be 0°, 0.5°, 1°, 1.5°, 2°, etc., and the value of A2 can be 175°, 176°, 177°, 178°, 179°, 180°, etc., without limitation.

[0057] Optionally, the deformation process of the first spacing column 61 can coincide with at least part of the bending process of the flexible display panel 100. Specifically, when the foldable area 51 of the flexible display panel 100 starts to bend, A gradually increases from the minimum folding angle A1, and in the process of increasing A, the first spacing column 61 also deforms slowly and closes the first opening 31, and the deformation time of the first spacing column 61 can be the same as or less than the bending time of the foldable area 51.

[0058] ​Alternatively, when A is greater than A1 and less than A2, the first spacing column 61 deforms again and closes the first opening 31 after the flexible display panel 100 is bent by a certain angle (i.e., when the foldable area 51 of the flexible display panel 100 is bent by a certain angle and remains). Specifically, the first spacing column 61 starts to deform and close the first opening 31 when the foldable area 51 of the flexible display panel 100 is bent by a certain angle and remains for a preset time (the preset time can be 0.1s-2s), and the deformation time of the first spacing column 61 can be 0.1s-1s, which is not limited in particular. After the flexible display panel 100 is bent by a certain angle and remains at this angle (satisfying 0°<A≤150°), the foldable area 51 of the flexible display panel 100 can still be used for display.

[0059] Similarly, the deformation mode of the second spacing column 62 can refer to the foregoing first spacing column 61, which is not limited in particular.

[0060] When the flexible display panel 100 is bent at the foldable area 51, the array substrate 10 and the opposing substrate 20 are bent at the foldable area 51 and approach each other, so that the space between the array substrate 10 and the opposing substrate 20 is compressed to be small, and the microcapsules 40 move to the first and second connecting areas 52 and 53 on both sides under the action of the pressure. At this time, the first spacing column 61 deforms and closes the first opening 31, and / or the second spacing column 62 deforms and closes the second opening 32, which can inhibit the microcapsules 40 of the foldable area 51 from moving to the first and second connecting areas 52 and 53 of the flexible display panel 100, thereby ensuring the uniformity of the density of the microcapsules 40 of the flexible display panel 100, and further improving the display uniformity of the flexible display panel 100, and the display effect is good. When the bending angle of the flexible display panel 100 is large, to avoid the microcapsules 40 being crushed, the first and second spacing columns 61 and 62 deform to make the first and second openings 31 and 32 in the open state, so that at least part of the microcapsules 40 in the first capsule box 30 can flow out through the first and second openings 31 and 32, thereby prolonging the service life of the flexible display panel 100.

[0061] By setting the bending angle of the foldable area 51 of the flexible display panel 100 as A, A=0°, the microcapsules 40 in the first capsule box 30 flow freely between the array substrate 10 and the opposing substrate 20, 0°<A≤150°, the first spacing column 61 deforms and closes the first opening 31, and / or the second spacing column 62 deforms and closes the second opening 32, which can inhibit the microcapsules 40 of the foldable area 51 from moving to the first and second connecting areas 52 and 53, thereby ensuring the uniformity of the density of the microcapsules 40 of the flexible display panel 100, and further improving the display uniformity of the flexible display panel 100, and the display effect is good.

[0062] In one embodiment, the flexible display panel 100 further has an intermediate folding angle A3, satisfying: A1 < A3 < A2, and A2 - A3 < A3 - A1. When A is greater than A1 and less than or equal to A3, both the first spacer 61 and the second spacer 62 deform to block the first opening 31 and the second opening 32. When A is greater than A3 and less than or equal to A2, both the first spacer 61 and the second spacer 62 deform to open the first opening 31 and the second opening 32.

[0063] Optionally, the condition A2-A3 < A3-A1 is met, meaning the difference between A3 and A2 is less than the difference between A3 and A1. For example, A1 = 0°, A2 = 180°, and A3 = 150°. When the folding angle A of the flexible display panel 100 is greater than A1 and less than or equal to A3, both the first spacer 61 and the second spacer 62 deform to seal the first opening 31 and the second opening 32, allowing the folded flexible display panel 100 to still be used for display. When A is greater than A3 and less than or equal to A2, the folding angle of the flexible display panel 100 is larger, and the space inside the first capsule box 30 becomes smaller. To prevent the microcapsules 40 from being squeezed and ruptured, the first opening 31 and the second opening 32 are open, allowing at least a portion of the microcapsules 40 inside the first capsule box 30 to flow out through the first opening 31 and the second opening 32.

[0064] When the flexible display panel 100 is unfolded from the folded state (i.e., A gradually decreases from A2 to A1), the lengths of the first spacer 61 and the second spacer 62 remain unchanged, that is, the first opening 31 and the second opening 32 remain open. The outflowing microcapsules 40 can flow back into the first capsule box 30 under external pressure, which avoids uneven distribution of microcapsules 40 in the flexible display panel 100 after folding and unfolding, which would cause bright or dark lines to appear in the flexible display panel 100. This can improve the display uniformity of the flexible display panel 100.

[0065] In one embodiment, such as Figure 1 As shown, the flexible display panel 100 is also provided with a pressure sensor 70. The pressure sensor 70 is used to detect the pressure applied to the outside by the first capsule 30 when the flexible display panel 100 is bent. The pressure detected by the pressure sensor 70 is used to control the deformation of the first spacer 61 and the second spacer 62.

[0066] The pressure sensor 70 can be a resistive pressure sensor, a capacitive pressure sensor, a piezoelectric pressure sensor, or any other feasible pressure sensor, without limitation. The pressure sensor 70 can be disposed inside or outside the first capsule box 30, and the pressure sensor 70 and the first capsule box 30 can be bonded, snap-fitted, or otherwise, without limitation.

[0067] The pressure sensor 70 can be directly connected with the first spacing column 61 and / or the second spacing column 62 in a manner of bonding, clamping or the like, which is not limited; or the pressure sensor 70 is electrically connected with the first spacing column 61 and / or the second spacing column 62; or the pressure sensor 70 has no connection relationship with the first spacing column 61 and / or the second spacing column 62, and the first spacing column 61 can be deformed according to the data detected by the pressure sensor 70, which is not limited in particular.

[0068] Optionally, the number of the pressure sensor 70 can be one, and the first spacing column 61 and the second spacing column 62 are deformed according to the detection data thereof. Alternatively, the pressure sensor 70 can also be two, and one pressure sensor 70 is arranged at the first opening 31 and the second opening 32 respectively, the first spacing column 61 is deformed according to the detection data of the pressure sensor 70 at the first opening 31, and the second spacing column 62 is deformed according to the detection data of the pressure sensor 70 at the second opening 32, which is more accurate.

[0069] When the flexible display panel 100 is bent at the foldable area 51, the space between the array substrate 10 and the opposite substrate 20 becomes smaller, resulting in an increase in the pressure in the first capsule box 30. The pressure sensor 70 is used to detect the change in the pressure applied by the first capsule box 30 to the outside, and the first spacing column 61 and the second spacing column 62 are deformed according to the change in the pressure value, so as to inhibit the movement of the microcapsules 40 in the foldable area 51 to the positions of the first connection area 52 and the second connection area 53 of the flexible display panel 100, which is sensitive in response and simple in control logic.

[0070] In one embodiment, as shown in Figure 1 The pressure sensor 70 includes a first pressure sensor and a second pressure sensor, both of which are arranged on the array substrate 10, the first pressure sensor is connected with the side of the first capsule box 30 which is provided with the first opening 31, and the second pressure sensor is connected with the side of the first capsule box 30 which is provided with the second opening 32.

[0071] Optionally, the first pressure sensor is connected and fixed with the array substrate 10 in a manner of bonding, clamping or the like, and is in close contact with the side of the first capsule box 30 which is provided with the first opening 31, so as to facilitate the first pressure sensor to detect the change in the pressure transmitted from the side of the first capsule box 30. The first spacing column 61 is arranged on the first pressure sensor and is deformed according to the change in the pressure value detected by the first pressure sensor.

[0072] Optionally, the flexible display panel 100 further comprises a first control member, the first control member being electrically connected with the first pressure sensor and the first spacing column 61, the pressure data detected by the first pressure sensor being transmitted to the first control member, and the first control member performing corresponding control on the first spacing column 61 according to the pressure data detected by the first pressure sensor, so as to make the first spacing column 61 elongate or shorten in the first direction X.

[0073] Similarly, as shown in Figure 1 , the second pressure sensor can be arranged in the same way as the first pressure sensor, and the specific arrangement is not limited.

[0074] By arranging the first pressure sensor and the second pressure sensor, the first pressure sensor is connected with the side of the first capsule box 30 in which the first opening 31 is arranged, and the second pressure sensor is connected with the side of the first capsule box 30 in which the second opening 32 is arranged, so that the pressure changes at different positions can be sensitively sensed and more accurately.

[0075] In one embodiment, as shown in Figure 3 and Figure 4 , a first adjusting space 81 is further formed between the array substrate 10 and the opposite substrate 20, the first adjusting space 81 being located at the side of the first capsule box 30 in which the first opening 31 is arranged, and the first adjusting space 81 being in communication with the first opening 31. A second adjusting space 82 is further formed between the array substrate 10 and the opposite substrate 20, the second adjusting space 82 being located at the side of the first capsule box 30 in which the second opening 32 is arranged, and the second adjusting space 82 being in communication with the second opening 32.

[0076] In the case that A is greater than A3 and less than or equal to A2, both the first spacing column 61 and the second spacing column 62 are deformed to make the first opening 31 and the second opening 32 be in an open state, and at least part of the microcapsules 40 in the first capsule box 30 flow between the first capsule box 30 and the first adjusting space 81 through the first opening 31, and flow between the first capsule box 30 and the second adjusting space 82 through the second opening 32.

[0077] Optionally, in the case that A is greater than A3 and less than or equal to A2, the length of the first spacing column 61 can be the same as the length of the first spacing column 61 when A=A1, or the length of the former can be smaller than the length of the latter, so as to facilitate the microcapsules 40 in the first capsule box 30 to flow out of the first opening 31 and the second opening 32 when the first capsule box 30 is under greater pressure.

[0078] When the folding angle of the foldable area 51 is large, at least part of the microcapsules 40 in the first capsule box 30 can flow between the first capsule box 30 and the first regulating space 81 through the first opening 31, and also flow between the first capsule box 30 and the second regulating space 82 through the second opening 32, so as to avoid the microcapsules 40 being squeezed and broken, and prolong the service life of the flexible display panel 100. When the flexible display panel 100 is unfolded from the folded state (i.e., A gradually changes from A2 to A1), the lengths of the first spacing column 61 and the second spacing column 62 remain unchanged, and the microcapsules 40 squeezed into the first regulating space 81 and the second regulating space 82 can flow back into the first capsule box 30 under the action of external pressure, so as to avoid the uneven distribution of the microcapsules 40 in the flexible display panel 100 after being unfolded from the folded state, which can cause bright lines or dark lines in the flexible display panel 100, and can improve the display uniformity of the flexible display panel 100.

[0079] Optionally, a barrier wall can be arranged between the array substrate 10 and the opposite substrate 20, the barrier wall, the array substrate 10, the opposite substrate 20 and the side of the first capsule box 30 provided with the first opening 31 together enclose the first regulating space 81, and the barrier wall, the array substrate 10, the opposite substrate 20 and the side of the first capsule box 30 provided with the second opening 32 together enclose the second regulating space 82, so as to limit the flow range of the microcapsules 40 in the first capsule box 30.

[0080] In an embodiment, referring to Figure 1 and Figure 4 The flexible display panel 100 further includes a second capsule box 91 and a third capsule box 92, the second capsule box 91 and the third capsule box 92 are arranged between the array substrate 10 and the opposite substrate 20, the second capsule box 91 is arranged apart from the first capsule box 30, and the space between the second capsule box 91 and the first capsule box 30 forms the first regulating space 81. The third capsule box 92 is arranged apart from the first capsule box 30, and the space between the third capsule box 92 and the first capsule box 30 forms the second regulating space 82. The second capsule box 91 and the third capsule box 92 each have a plurality of microcapsules 40.

[0081] Optionally, the first capsule box 30, the second capsule box 91 and the third capsule box 92 together constitute a display area of the flexible display panel 100.

[0082] Optionally, the material and thickness of the second capsule box 91 and the third capsule box 92 are similar to the first capsule box 30, and refer to the foregoing description, which will not be repeated here. Optionally, the second capsule box 91 is located at the first connection area 52, and the third capsule box 92 is located at the second connection area 53. Since the foldable area 51 of the flexible display panel 100 occupies a smaller area of the flexible display panel 100 as a whole, the area of the first connection area 52 and the area of the second connection area 53 are larger than the area of the foldable area 51, the size of the second capsule box 91 and the third capsule box 92 in the second direction Y is larger than the size of the first capsule in the second direction Y, and the size of the second capsule box 91 and the third capsule box 92 in the second direction Y can be substantially the same.

[0083] Optionally, the second capsule box 91 can be a closed structure, and the second capsule box 91 has a plurality of microcapsules 40. Alternatively, as shown in FIG. 6, the second capsule box 91 has a third opening 911, the third opening 911 is opposite to the first opening 31, and the first opening 31 and the third opening 911 are both in communication with the first adjustment space 81. In this way, the flowability between the first capsule box 30, the first adjustment space 81 and the second capsule box 91 can be increased. Alternatively, in an embodiment, the volume of the first adjustment space 81 is very small, the first adjustment space 81 can be approximately the space between the third opening 911 and the first opening 31 of the second capsule box 91, and the second capsule box 91 is closely arranged away from the side of the first spacing column 61 away from the first capsule box 30. The above settings can be made, and are not limited in particular. Figure 4 Similarly, the third capsule box 92 has a fourth opening 921, the fourth opening 921 is opposite to the second opening 32, and the second opening 32 and the fourth opening 921 are both in communication with the second adjustment space 82. The arrangement of the third capsule box 92 and the second adjustment space 82 is similar to the arrangement of the second capsule box 91 and the first adjustment space 81, and refer to the foregoing description, which will not be repeated here.

[0084] By arranging the flexible display panel 100 to further include the second capsule box 91 and the third capsule box 92, the first capsule box 30, the second capsule box 91 and the third capsule box 92 jointly constitute a display area of the flexible display panel 100, and the second capsule box 91 and the third capsule box 92 each have a plurality of microcapsules 40, so that the display degree of the flexible display panel 100 is high and the display effect is good.

[0085] Please refer to

[0086] , the embodiment of the present application further provides an electronic device 1000, which comprises a shell 200 and the flexible display panel in the embodiment of the present application, and the flexible display panel is accommodated in the shell 200. Figure 5

[0087] ​Optionally, the electronic device 1000 can be a mobile phone, a tablet, a computer, electronic paper, etc., and is not specifically limited. The electronic device 1000 can be a single-fold electronic device 1000, such as a single-fold mobile phone, a three-fold mobile phone, etc. The electronic device 1000 can be horizontally folded to increase the display area when unfolded, or can be vertically folded to reduce the volume when folded, and is not specifically limited.

[0088] Optionally, the shell 200 can be bent or folded synchronously with the flexible display panel. The connection mode of the shell 200 and the flexible display panel can be adhesion, clamping, screwing, magnetic attraction, etc., and is not specifically limited. The shape of the flexible display panel can be square, circular, rectangular, trapezoidal, irregular, etc., and the shape of the shell 200 corresponds to the flexible display panel, and is not specifically limited.

[0089] The electronic device 1000 in the embodiments of the present application has high display uniformity and good display effect by using the flexible display panel in the embodiments of the present application.

[0090] In the description of the embodiments of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate the orientation or positional relationship based on the drawings, and are only used to facilitate the description of the present application and simplify the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0091] The above disclosure is only a preferred embodiment of the present application, and of course cannot limit the scope of the present application. Those skilled in the art can understand that the above-mentioned all or part of the processes are implemented, and equivalent changes made according to the claims of the present application still belong to the scope covered by the present application.

Claims

1. A flexible display panel, characterized in that, The flexible display panel comprises: an array substrate; an opposite substrate opposite to the array substrate in a first direction; a first capsule box arranged between the array substrate and the opposite substrate, the first capsule box having a plurality of microcapsules therein; wherein the flexible display panel has a foldable area, the array substrate and the opposite substrate being bendable in the foldable area, and the first capsule box being located in the foldable area; the first capsule box has a first opening in a second direction, and the flexible display panel further comprises a first spacing column arranged at the first opening, the first spacing column being a deformable structure and sealing the corresponding first opening when the flexible display panel is bent by a preset angle, and the second direction intersects the first direction.

2. The flexible display panel of claim 1, wherein, The first capsule box further has a second opening opposite to the first opening in the second direction, and the flexible display panel further comprises a second spacing column arranged at the second opening, the second spacing column being a deformable structure and sealing the corresponding second opening when the flexible display panel is bent by a preset angle.

3. The flexible display panel of claim 2, wherein, The flexible display panel has a minimum folding angle A1 and a maximum folding angle A2; the folding angle of the flexible display panel is A, the flexible display panel is in a flat state when A=A1, and the first opening and the second opening are in an open state, when A is greater than A1 and less than A2, the first spacing column and the second spacing column are deformed to make the first opening and the second opening in a sealed state, and when A=A2, the first opening and the second opening are in an open state.

4. The flexible display panel of claim 3, wherein, The flexible display panel further has an intermediate folding angle A3, which satisfies: A1 5. The flexible display panel according to claim 3 or 4, characterized in that, The flexible display panel is further provided with a pressure sensor, the pressure sensor is used for detecting the pressure applied by the first capsule box when the flexible display panel is bent, and the pressure detected by the pressure sensor is used for controlling the deformation of the first spacing column and the second spacing column.

6. The flexible display panel of claim 5, wherein, The pressure sensor comprises a first pressure sensor and a second pressure sensor, the first pressure sensor and the second pressure sensor are both arranged on the array substrate, the first pressure sensor is connected with the side of the first capsule box where the first opening is formed, and the second pressure sensor is connected with the side of the first capsule box where the second opening is formed.

7. The flexible display panel of claim 4, wherein, A first adjusting space and a second adjusting space are further formed between the array substrate and the counter substrate, the first adjusting space is located at one side of the first capsule box provided with the first opening, the second adjusting space is located at one side of the first capsule box provided with the second opening, the first adjusting space is communicated with the first opening, and the second adjusting space is communicated with the second opening; When A is greater than A3 and less than or equal to A2, the first spacer column and the second spacer column are deformed to make the first opening and the second opening in an open state, at least part of the microcapsules in the first capsule box flow between the first capsule box and the first adjusting space through the first opening, and flow between the first capsule box and the second adjusting space through the second opening.

8. The flexible display panel of claim 7, wherein, The flexible display panel further comprises a second capsule box and a third capsule box, the second capsule box and the third capsule box are both arranged between the array substrate and the counter substrate, the second capsule box is arranged apart from the first capsule box, and a space between the second capsule box and the first capsule box forms the first adjusting space; the third capsule box is arranged apart from the first capsule box, and a space between the third capsule box and the first capsule box forms the second adjusting space; the second capsule box and the third capsule box both have a plurality of microcapsules therein.

9. The flexible display panel of claim 8, wherein, The second capsule box has a third opening opposite to the first opening, and the first adjusting space is communicated with the first opening and the third opening; the third capsule box has a fourth opening opposite to the second opening, and the second adjusting space is communicated with the second opening and the fourth opening.

10. An electronic device, comprising: The flexible display panel as claimed in any one of claims 1 to 9 is contained in the shell.

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