Flexible light-emitting device

Abstract

The present invention discloses a flexible light-emitting device, comprising: a first electrode, a light-emitting functional layer and a second electrode arranged in a light-emitting area, and the light-emitting functional layer is arranged on a side of the first electrode away from a flexible substrate, and the second electrode is arranged on a side of the light-emitting functional layer away from the flexible substrate; an insulating layer covers the gap between adjacent first electrodes, covers a part of the first electrode, and covers at least a part of the non-light-emitting area; a first isolation column is arranged on a surface of the insulating layer away from the flexible substrate; a plurality of first electrodes are arranged in sequence along a first direction, each first electrode extends along a second direction, a plurality of second electrodes are arranged in sequence along the second direction, each second electrode extends along the first direction, a first isolation column extends along the first direction, and each first isolation column is arranged on both sides of the second electrode; the surface of the insulating layer provided with the first isolation column has a concave-convex structure. The present invention can improve the bending resistance of the flexible light-emitting device and improve the reliability of the flexible light-emitting device.

Description

Technical Field

[0001] The present invention relates to the field of organic light emitting technology, and in particular to a flexible light emitting device. Background Art

[0002] Organic lighting emitting display (OLED) has the advantages of active luminescence, wide color gamut, fast response, wide viewing angle, high contrast, and planarization. It is the development trend of the next generation of display and lighting technology.

[0003] When a flexible OLED light-emitting device is bent, compressive stress and tensile stress will exist. The greater the bending angle, the greater the force it is subjected to. For flexible PMOLED, multiple isolation columns are set in the screen body to realize the function of row and column scanning. When a flexible PMOLED is bent, the isolation columns are subjected to greater stress and are prone to fall off, affecting the light emission of the light-emitting device. Summary of the invention

[0004] The present invention provides a flexible light-emitting device to improve the bending resistance of the flexible light-emitting device and improve the reliability of the flexible light-emitting device.

[0005] According to one aspect of the present invention, there is provided a flexible light emitting device, comprising:

[0006] A flexible substrate, and a plurality of first electrodes, an insulating layer, a light-emitting functional layer, a plurality of first isolation columns, and a plurality of second electrodes arranged on the same side of the flexible substrate;

[0007] The flexible substrate comprises a light-emitting area and a non-light-emitting area; the plurality of first electrodes, the light-emitting functional layer and the second electrode are arranged in the light-emitting area, and the light-emitting functional layer is arranged on a side of the first electrode away from the flexible substrate, and the second electrode is arranged on a side of the light-emitting functional layer away from the flexible substrate; the insulating layer is arranged between the second electrode and the flexible substrate, and the insulating layer covers the gaps between adjacent first electrodes, covers a part of the first electrode and covers at least a part of the non-light-emitting area; the plurality of first isolation columns are arranged on a surface of the insulating layer away from the flexible substrate;

[0008] A plurality of the first electrodes are sequentially arranged along a first direction, each of the first electrodes extends along a second direction, a plurality of the second electrodes are sequentially arranged along a second direction, each of the second electrodes extends along the first direction, and the first direction and the second direction intersect each other; the first isolation pillars extend along the first direction, and each of the first isolation pillars is disposed on both sides of the second electrode;

[0009] The surface of the insulating layer where the first isolation column is disposed has a concavo-convex structure.

[0010] Optionally, a shape of the longitudinal section of the concavo-convex structure includes at least one of a polygon, a semicircle or a semi-ellipse; wherein the longitudinal section of the concavo-convex structure is perpendicular to an extension direction of the first isolation column.

[0011] Optionally, the flexible light-emitting device further includes:

[0012] at least two second isolation columns, the second isolation columns extending along the second direction, the second isolation columns being arranged on a surface of the insulating layer away from the flexible substrate, some of the second isolation columns being arranged on a first side of the light-emitting area, and some of the second isolation columns being arranged on a second side of the light-emitting area; the first side and the second side being arranged opposite to each other;

[0013] The second isolation column is connected to the first isolation column, and the surface of the insulating layer on which the second isolation column is provided is provided with the concavo-convex structure.

[0014] Optionally, at least two second isolation columns are disposed on the first side of the light-emitting area;

[0015] At least two second isolation columns are disposed on the second side of the light emitting area;

[0016] At least two first isolation columns are disposed on the third side of the light emitting area, and at least two first isolation columns are disposed on the fourth side of the light emitting area. The third side and the fourth side are disposed opposite to each other.

[0017] Optionally, a vertical projection of the first isolation column on the flexible substrate has a shape of at least one of a folded line, a wave, and an arc;

[0018] The vertical projection shape of the second isolation column on the flexible substrate is at least one of a folded line shape, a wave shape, and an arc shape.

[0019] Optionally, the first isolation column has a plurality of first hollow areas in a vertical projection of the flexible substrate;

[0020] The second isolation column has a plurality of second hollow areas in a vertical projection of the flexible substrate.

[0021] Optionally, a shape of a vertical projection of the first hollow area on the flexible substrate includes at least one of a polygon, a semicircle, a circle, a semi-ellipse and an ellipse;

[0022] The vertical projection shape of the second hollow area on the flexible substrate includes at least one of a polygon, a semicircle, a circle, a semi-ellipse and an ellipse.

[0023] Optionally, the first isolation column and the second isolation column are both made of organic materials.

[0024] Optionally, the longitudinal cross-section of the first isolation column is a trapezoid, and the length of the trapezoid away from the bottom of the insulating layer is greater than the width of the trapezoid adjacent to the bottom of the insulating layer; wherein the longitudinal cross-section of the first isolation column is perpendicular to the extension direction of the first isolation column.

[0025] Optionally, the light-emitting functional layer includes a first functional layer, an organic light-emitting layer, and a second functional layer which are stacked in sequence; the first functional layer is arranged on a side of the organic light-emitting layer adjacent to the first electrode;

[0026] When the first electrode is an anode and the second electrode is a cathode, the first functional layer includes at least one of a hole injection layer, a hole transport layer and an electron blocking layer, and the second functional layer includes at least one of an electron injection layer, an electron transport layer and a hole blocking layer;

[0027] When the second electrode is an anode and the first electrode is a cathode, the second functional layer includes at least one of a hole injection layer, a hole transport layer and an electron blocking layer, and the first functional layer includes at least one of an electron injection layer, an electron transport layer and a hole blocking layer.

[0028] In the flexible light-emitting device of the embodiment of the present invention, multiple first isolation columns are arranged on the surface of the insulating layer away from the flexible substrate, multiple first electrodes are arranged in sequence along the first direction, and each first electrode extends along the second direction, multiple second electrodes are arranged in sequence along the second direction, and each second electrode extends along the first direction. The first isolation columns extend along the first direction, and each first isolation column is arranged on both sides of the second electrode. The surface of the insulating layer on which the first isolation columns are arranged has a concave-convex structure, so that the contact area between the first isolation columns and the insulating layer is larger, and the adhesion force between the first isolation columns and the insulating layer is larger, so as to avoid the first isolation columns falling off when the flexible light-emitting device is bent, affecting the light emission of the light-emitting device, and improving the bending resistance of the flexible light-emitting device.

[0029] It should be understood that the contents described in this section are not intended to identify the key or important features of the embodiments of the present invention, nor are they intended to limit the scope of the present invention. Other features of the present invention will become easily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0031] Figure 1 It is a schematic diagram of a flexible light-emitting device provided by an embodiment of the present invention.

[0032] Figure 2 yes Figure 1 Cross-sectional view of the flexible light-emitting device along section line AA.

[0033] Figure 3 It is a partial enlarged view of a flexible light-emitting device provided by an embodiment of the present invention.

[0034] Figure 4 is a schematic diagram of another flexible light-emitting device provided by an embodiment of the present invention.

[0035] Figure 5 is a schematic diagram of another flexible light-emitting device provided by an embodiment of the present invention.

[0036] Figure 6 is a schematic diagram of another flexible light-emitting device provided by an embodiment of the present invention.

[0037] Figure 7 It is a schematic diagram of a first isolation column provided in an embodiment of the present invention.

[0038] Figure 8 It is a schematic diagram of a second isolation column provided by an embodiment of the present invention.

[0039] Fig. 9 It is a cross-sectional view of another light-emitting device provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0040] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0041] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0042] An embodiment of the present invention provides a flexible light-emitting device. Figure 1 is a schematic diagram of a flexible light-emitting device provided by an embodiment of the present invention, Figure 2 yes Figure 1 The cross-sectional view of the flexible light-emitting device along the section line AA, refer to Figure 1 and Figure 2 The flexible light-emitting device includes: a flexible substrate 10, and a plurality of first electrodes 20, an insulating layer 30, a light-emitting functional layer 40, a plurality of first isolation columns 50 and a plurality of second electrodes 60 arranged on the same side of the flexible substrate 10.

[0043] The flexible substrate 10 includes a light-emitting area 101 and a non-light-emitting area 102; a plurality of first electrodes 20, a light-emitting functional layer 40, and a second electrode 60 are arranged in the light-emitting area 101, and the light-emitting functional layer 40 is arranged on a side of the first electrode 20 away from the flexible substrate 10, and the second electrode 60 is arranged on a side of the light-emitting functional layer 40 away from the flexible substrate 10; an insulating layer 30 is arranged between the second electrode 60 and the flexible substrate 10, and the insulating layer 30 covers the gaps between adjacent first electrodes 20, covers a portion of the first electrode 20, and covers at least a portion of the non-light-emitting area 102; and a plurality of first isolation columns 50 are arranged on a surface of the insulating layer 30 away from the flexible substrate 10.

[0044] A plurality of first electrodes 20 are arranged in sequence along a first direction X, and each first electrode 20 extends along a second direction Y. A plurality of second electrodes 60 are arranged in sequence along the second direction Y, and each second electrode 60 extends along the first direction X. The first direction X and the second direction Y intersect with each other. The first isolation columns 50 extend along the first direction, and each first isolation column 50 is disposed on both sides of the second electrode 60. The surface of the insulating layer 30 on which the first isolation columns 50 are disposed has a concave-convex structure 31.

[0045] Among them, one of the first electrode 20 and the second electrode 60 is an anode and the other is a cathode. The area directly facing the first electrode 20 and the second electrode 60, and the light-emitting functional layer 40 located between the area directly facing the first electrode 20 and the second electrode 60 are a light-emitting unit 41. The first direction X and the second direction Y intersect with each other, and can be perpendicular to each other for example. The first electrode 20 and the second electrode 60 intersect with each other to form a plurality of light-emitting units 41 arranged in an array. By sending a driving signal to the plurality of first electrodes 20 and the plurality of second electrodes 60 in sequence, the light-emitting units 41 in the array can be lit in a scanning manner, and each light-emitting unit 41 works in a short pulse mode to achieve instantaneous high-brightness light emission. Each light-emitting unit 41 enters a dormant state after instantaneous high-brightness light emission, so the overall energy consumption is low. The light-emitting functional layer 40 may include film layers such as a hole injection layer, a hole transport layer, an electron blocking layer, an organic light-emitting layer, a hole blocking layer, an electron transport layer, and an electron injection layer.

[0046] The first spacer 50 is used to separate the adjacent second electrodes 60. The insulating layer 30 may be an organic insulating layer or an inorganic insulating layer. The first spacer 50 is disposed on the surface of the insulating layer 30. By arranging the concave-convex structure 31 on the surface of the insulating layer 30, the contact area between the first spacer 50 and the insulating layer 30 is larger, and the adhesion between the first spacer 50 and the insulating layer 30 is greater, so as to avoid the first spacer 50 falling off when the flexible light-emitting device is bent, thereby affecting the light-emitting unit. The concave-convex structure 31 may be a regular shape or an irregular shape. For example, the longitudinal section of the concave-convex structure 31 may include a triangle, a rectangle, a trapezoid, a semicircle, a semi-ellipse, etc. The concave-convex structure 31 may be formed by patterning the surface of the insulating layer 30. For example, the regular concave-convex structure 31 may be formed by processing the surface of the insulating layer 30 using a half-tone mask process. For the irregular concave-convex structure 31, the surface of the insulating layer 30 may be processed and formed using ashing or other processes. The ashing gas may be CF4+O2+Ar, etc.

[0047] In the flexible light-emitting device of the embodiment of the present invention, multiple first isolation columns 50 are arranged on the surface of the insulating layer 30 away from the flexible substrate 10, multiple first electrodes 20 are arranged in sequence along the first direction X, each first electrode 20 extends along the second direction Y, multiple second electrodes 60 are arranged in sequence along the second direction Y, each second electrode 60 extends along the first direction X, the first isolation column 50 extends along the first direction, each first isolation column 50 is arranged on both sides of the second electrode 60, and the surface of the insulating layer 30 on which the first isolation column 50 is arranged has a concave-convex structure 31, so that the contact area between the first isolation column 50 and the insulating layer 30 is larger, and the adhesion between the first isolation column 50 and the insulating layer 30 is larger, so as to avoid the first isolation column 50 falling off when the flexible light-emitting device is bent, which affects the light emission of the light-emitting device, and improves the bending resistance of the flexible light-emitting device.

[0048] Figure 3 is a partial enlarged view of a flexible light-emitting device provided in an embodiment of the present invention. Based on the above embodiment, optionally, refer to Figure 2 and Figure 3 The shape of the longitudinal section of the concavo-convex structure 31 includes at least one of a polygon, a semicircle or a semi-ellipse; wherein the longitudinal section of the concavo-convex structure 31 is perpendicular to the extension direction of the first isolation column 50 .

[0049] Specifically, the concave-convex structure 31 includes a concave portion and a convex portion, and the shape of the longitudinal section of the concave-convex structure 31 includes at least one of a polygon, a semicircle, or a semi-ellipse. The shape of the concave portion may include at least one of a polygon, a semicircle, or a semi-ellipse, and the shape of the convex portion may include at least one of a polygon, a semicircle, or a semi-ellipse. The polygon may be a triangle, a square, a rectangle, a rhombus, a pentagon, etc. The shape of the longitudinal section of the concave-convex structure 31 includes at least one of a polygon, a semicircle, or a semi-ellipse, that is, the shape of the longitudinal section of the concave-convex structure 31 may be a polygon, a semicircle, or a semi-ellipse, or may be a combination of a polygon, a semicircle, and a semi-ellipse.

[0050] Polygonal, semicircular and semi-elliptical concave-convex structures 31 are easier to manufacture and can greatly increase the contact area between the first isolation column 50 and the insulating layer 30. The longitudinal section of the concave-convex structure 31 adopts the above-mentioned shape, which can reduce the difficulty of the manufacturing process of the concave-convex structure 31 while ensuring that the adhesion between the first isolation column 50 and the insulating layer 30 can be greatly improved.

[0051] Figure 4 is a schematic diagram of another flexible light-emitting device provided by an embodiment of the present invention. Based on the above embodiment, optionally, refer to Figure 4 The flexible light-emitting device also includes: at least two second isolation columns 70, the second isolation columns 70 extend along the second direction Y, the second isolation columns 70 are arranged on the surface of the insulating layer 30 away from the flexible substrate 10, part of the second isolation columns 70 are arranged on the first side of the light-emitting area 101, and part of the second isolation columns 70 are arranged on the second side of the light-emitting area 101; the first side and the second side are arranged opposite to each other; the second isolation columns 70 are connected to the first isolation columns 50; and the surface of the insulating layer 30 on which the second isolation columns 70 are arranged is provided with a concave-convex structure.

[0052] Among them, the second isolation column 70 is arranged in the non-light-emitting area 102, and the surface of the insulating layer 30 provided with the second isolation column 70 is provided with a concavo-convex structure, which can increase the adhesion between the second isolation column 70 and the insulating layer 30. By arranging the second isolation column 70 at the periphery of the light-emitting area 101, when the flexible light-emitting device is bent, the second isolation column 70 can withstand a large bending stress, reduce the stress borne by the light-emitting area 101, avoid the film layer of the light-emitting area 101 from falling off and affecting the light emission, and further improve the bending resistance of the light-emitting device.

[0053] Based on the above embodiment, optionally, refer to Figure 4 At least two second isolation columns 70 are arranged on the first side of the light-emitting area 101; at least two second isolation columns 70 are arranged on the second side of the light-emitting area 101; at least two first isolation columns 50 are arranged on the third side of the light-emitting area 101, and at least two first isolation columns 50 are arranged on the fourth side of the light-emitting area 101, and the third side and the fourth side are arranged opposite to each other.

[0054] Specifically, at least two first isolation columns 50 are respectively arranged on the third side and the fourth side of the light-emitting area 101, and at least two second isolation columns 70 are respectively arranged on the first side and the second side of the light-emitting area 101, so that the first isolation columns 50 and the second isolation columns 70 fully surround the light-emitting area 101. When the flexible light-emitting device is bent, the first isolation columns 50 and the second isolation columns 70 surrounding the light-emitting area 101 can withstand greater bending stress, reduce the greater stress on the light-emitting area 101, avoid the film layer of the light-emitting area 101 from falling off and affecting the light emission, and further improve the bending resistance of the light-emitting device. Exemplarily, 2-3 second isolation columns 70 can be respectively arranged on the first side and the second side of the light-emitting area 101, and 2-3 first isolation columns 50 can be respectively arranged on the third side and the fourth side of the light-emitting area 101.

[0055] Figure 5 is a schematic diagram of another flexible light-emitting device provided by an embodiment of the present invention. Based on the above embodiment, optionally, refer to Figure 4 and Figure 5 The vertical projection shape of the first isolation column 50 on the flexible substrate 10 is at least one of a broken line, a wave, and an arc; the vertical projection shape of the second isolation column 70 on the flexible substrate 10 is at least one of a broken line, a wave, and an arc.

[0056] The vertical projection of the first spacer column 50 on the flexible substrate 10 is in the shape of at least one of a folded line, a wave, and an arc, and the vertical projection of the center line and the edge of the first spacer column 50 on the flexible substrate 10 may be in the shape of at least one of a folded line, a wave, and an arc. The vertical projection of the second spacer column 70 on the flexible substrate 10 is in the shape of at least one of a folded line, a wave, and an arc, and the vertical projection of the center line and the edge of the second spacer column 50 on the flexible substrate 10 may be in the shape of at least one of a folded line, a wave, and an arc.

[0057] Specifically, curved shapes such as zigzag, wavy and arc shapes can better release stress and avoid stress concentration. By setting the vertical projection shape of the first isolation column 50 and the second isolation column 70 on the flexible substrate 10 to be at least one of a zigzag, a wavy and an arc shape, when the flexible light-emitting device is bent, the first isolation column 50 and the second isolation column 70 can provide a stress release path to avoid excessive stress concentration causing the first isolation column 50 and the second isolation column 70, as well as other film layers of the light-emitting device to fall off. In addition, when the zigzag, wavy and arc shapes are bent, the force points are concentrated at the bending point rather than the bending direction of the flexible light-emitting device, which can better disperse the stress in the bending direction of the flexible light-emitting device, and further avoid excessive stress concentration causing the first isolation column 50 and the second isolation column 70, as well as other film layers of the light-emitting device to fall off.

[0058] Figure 6 is a schematic diagram of another flexible light-emitting device provided by an embodiment of the present invention, Figure 7 is a schematic diagram of a first isolation column provided by an embodiment of the present invention, Figure 8 is a schematic diagram of a second isolation column provided by an embodiment of the present invention. Based on the above embodiment, optionally, refer to Figure 6-Figure 8 The vertical projection of the first isolation column 50 on the flexible substrate 10 has a plurality of first hollow areas 51 ; the vertical projection of the second isolation column 70 on the flexible substrate 10 has a plurality of second hollow areas 71 .

[0059] Specifically, the first hollow area 51 can be set at the edge of the first isolation column 50, or can be set inside the first isolation column 50. The first hollow area 51 can be set on one edge of the first isolation column 50, or can be set on both edges of the first isolation column 50. The second hollow area 71 can be set on the edge of the second isolation column 70, or can be set inside the second isolation column 70. The second hollow area 71 can be set on one edge of the second isolation column 70, or can be set on both edges of the second isolation column 70.

[0060] By providing a plurality of first hollow areas 51, when the flexible light-emitting device is bent, the first hollow areas 51 can disperse and release the stress on the first isolation column 50, thereby preventing the first isolation column 50 and other film layers of the light-emitting device from falling off due to excessive stress concentration. By providing a plurality of second hollow areas 71, when the flexible light-emitting device is bent, the second hollow areas 71 can disperse and release the stress on the second isolation column 70, thereby preventing the second isolation column 70 and other film layers of the light-emitting device from falling off due to excessive stress concentration.

[0061] On the basis of the above embodiment, optionally, the shape of the vertical projection of the first hollow area 51 on the flexible substrate 10 includes at least one of a polygon, a semicircle, a circle, a semi-ellipse and an ellipse; the shape of the vertical projection of the second hollow area 71 on the flexible substrate 10 includes at least one of a polygon, a semicircle, a circle, a semi-ellipse and an ellipse.

[0062] Specifically, the manufacturing process of polygonal, semicircular, circular, semi-elliptical and elliptical hollow areas is relatively simple. The vertical projection shapes of the first hollow area 51 and the second hollow area 71 on the flexible substrate 10 include at least one of polygonal, semicircular, circular, semi-elliptical and elliptical shapes, which can reduce the process difficulty while improving the bending resistance of the flexible light-emitting device.

[0063] On the basis of the above embodiment, optionally, the materials used for the first isolation column 50 and the second isolation column 70 are both organic materials.

[0064] Specifically, organic materials have greater flexibility and can better buffer and release stress. The first isolation column 50 and the second isolation column 70 are made of organic materials, which can better buffer and release the bending stress of the light-emitting device, avoid excessive stress concentration that causes the first isolation column 50 and the second isolation column 70, as well as other film layers of the light-emitting device to fall off, and improve the bending resistance of the flexible light-emitting device.

[0065] Based on the above embodiment, optionally, refer to Figure 2 The longitudinal section of the first isolation column 50 is a trapezoid, and the length of the bottom side of the trapezoid away from the insulating layer 30 is greater than the width of the bottom side of the trapezoid adjacent to the insulating layer 30; wherein the longitudinal section of the first isolation column 50 is perpendicular to the extension direction of the first isolation column 50.

[0066] Specifically, when the second electrode 60 is manufactured, the electrode material is deposited on the surface of the light-emitting functional layer 40, and the first isolation column 50 cuts off the electrode material to form a plurality of second electrodes 60. By setting the longitudinal section of the first isolation column 50 to be an inverted trapezoid, when the second electrode 60 is manufactured, the first isolation column 50 can better cut off the electrode material and separate the second electrodes 60.

[0067] Fig. 9 is a cross-sectional view of another light emitting device provided by an embodiment of the present invention. Based on the above embodiment, optionally, refer to Fig. 9 The light-emitting functional layer 40 includes a first functional layer 42 , an organic light-emitting layer 43 , and a second functional layer 44 which are stacked in sequence. The first functional layer 42 is disposed on a side of the organic light-emitting layer 43 adjacent to the first electrode 20 .

[0068] When the first electrode 20 is an anode and the second electrode 60 is a cathode, the first functional layer 42 includes at least one of a hole injection layer, a hole transport layer and an electron blocking layer, and the second functional layer 44 includes at least one of an electron injection layer, an electron transport layer and a hole blocking layer.

[0069] When the second electrode 60 is an anode and the first electrode 20 is a cathode, the second functional layer 44 includes at least one of a hole injection layer, a hole transport layer and an electron blocking layer, and the first functional layer 42 includes at least one of an electron injection layer, an electron transport layer and a hole blocking layer.

[0070] Among them, the hole injection layer is arranged on the side of the hole transport layer adjacent to the anode, the electron blocking layer is arranged on the side of the hole transport layer adjacent to the organic light-emitting layer 43, the hole injection layer is used to improve the hole injection efficiency, the hole transport layer is used to improve the hole transport rate, and the electron blocking layer is used to block electrons. The electron injection layer is arranged on the side of the electron transport layer adjacent to the cathode, the hole blocking layer is arranged on the side of the electron transport layer adjacent to the organic light-emitting layer 43, the electron injection layer is used to improve the electron injection efficiency, the electron transport layer is used to improve the electron transport rate, and the hole blocking layer is used to block holes. By arranging the first functional layer 42 and the second functional layer 44, the luminous efficiency of the light-emitting unit can be improved.

[0071] It should be understood that the various forms of processes shown above can be used to reorder, add or delete steps. For example, the steps described in the present invention can be executed in parallel, sequentially or in different orders, as long as the desired results of the technical solution of the present invention can be achieved, and this document does not limit this.

[0072] The above specific implementations do not constitute a limitation on the protection scope of the present invention. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions can be made according to design requirements and other factors. Any modification, equivalent substitution and improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A flexible light-emitting device, characterized in that: include: A flexible substrate, and a plurality of first electrodes, an insulating layer, a light-emitting functional layer, a plurality of first isolation columns, and a plurality of second electrodes arranged on the same side of the flexible substrate; The flexible substrate comprises a light-emitting area and a non-light-emitting area; the plurality of first electrodes, the light-emitting functional layer and the second electrode are arranged in the light-emitting area, and the light-emitting functional layer is arranged on a side of the first electrode away from the flexible substrate, and the second electrode is arranged on a side of the light-emitting functional layer away from the flexible substrate; the insulating layer is arranged between the second electrode and the flexible substrate, and the insulating layer covers the gaps between adjacent first electrodes, covers a part of the first electrode and covers at least a part of the non-light-emitting area; the plurality of first isolation columns are arranged on a surface of the insulating layer away from the flexible substrate; A plurality of the first electrodes are sequentially arranged along a first direction, each of the first electrodes extends along a second direction, a plurality of the second electrodes are sequentially arranged along a second direction, each of the second electrodes extends along the first direction, and the first direction and the second direction intersect each other; the first isolation pillars extend along the first direction, and each of the first isolation pillars is disposed on both sides of the second electrode; The surface of the insulating layer where the first isolation column is disposed has a concavo-convex structure.

2. The flexible light-emitting device according to claim 1, characterized in that: The shape of the longitudinal section of the concavo-convex structure includes at least one of a polygon, a semicircle or a semi-ellipse; wherein the longitudinal section of the concavo-convex structure is perpendicular to the extension direction of the first isolation column.

3. The flexible light-emitting device according to claim 1, characterized in that: Also includes: at least two second isolation columns, the second isolation columns extending along the second direction, the second isolation columns being arranged on a surface of the insulating layer away from the flexible substrate, some of the second isolation columns being arranged on a first side of the light-emitting area, and some of the second isolation columns being arranged on a second side of the light-emitting area; the first side and the second side being arranged opposite to each other; The second isolation column is connected to the first isolation column, and the surface of the insulating layer on which the second isolation column is provided is provided with the concavo-convex structure.

4. The flexible light-emitting device according to claim 3, characterized in that: At least two second isolation columns are disposed on a first side of the light-emitting area, and at least two second isolation columns are disposed on a second side of the light-emitting area; At least two first isolation columns are disposed on the third side of the light emitting area, and at least two first isolation columns are disposed on the fourth side of the light emitting area. The third side and the fourth side are disposed opposite to each other.

5. The flexible light-emitting device according to claim 3, characterized in that: The vertical projection shape of the first isolation column on the flexible substrate is at least one of a folded line shape, a wave shape, and an arc shape; The vertical projection shape of the second isolation column on the flexible substrate is at least one of a folded line shape, a wave shape, and an arc shape.

6. The flexible light-emitting device according to claim 3, characterized in that: The vertical projection of the first isolation column on the flexible substrate has a plurality of first hollow areas; The second isolation column has a plurality of second hollow areas in a vertical projection of the flexible substrate.

7. The flexible light-emitting device according to claim 6, characterized in that: The vertical projection of the first hollow area on the flexible substrate includes at least one of a polygon, a semicircle, a circle, a semi-ellipse and an ellipse; The vertical projection shape of the second hollow area on the flexible substrate includes at least one of a polygon, a semicircle, a circle, a semi-ellipse and an ellipse.

8. The flexible light-emitting device according to claim 3, characterized in that: The first isolation column and the second isolation column are both made of organic materials.

9. The flexible light-emitting device according to claim 1, characterized in that: The longitudinal section of the first isolation column is a trapezoid, and the length of the trapezoid away from the bottom of the insulating layer is greater than the width of the trapezoid adjacent to the bottom of the insulating layer; wherein the longitudinal section of the first isolation column is perpendicular to the extension direction of the first isolation column.

10. The flexible light emitting device according to claim 1, characterized in that: The light-emitting functional layer comprises a first functional layer, an organic light-emitting layer and a second functional layer which are stacked in sequence; the first functional layer is arranged on a side of the organic light-emitting layer adjacent to the first electrode; When the first electrode is an anode and the second electrode is a cathode, the first functional layer includes at least one of a hole injection layer, a hole transport layer and an electron blocking layer, and the second functional layer includes at least one of an electron injection layer, an electron transport layer and a hole blocking layer; When the second electrode is an anode and the first electrode is a cathode, the second functional layer includes at least one of a hole injection layer, a hole transport layer and an electron blocking layer, and the first functional layer includes at least one of an electron injection layer, an electron transport layer and a hole blocking layer.

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