Flexible display panel and display device

Abstract

The present application relates to a flexible display panel and a display device, wherein the flexible display panel includes a display layer and a bending layer, wherein the bending layer includes a plurality of support units, wherein the support units include a first support plate, a second support plate and a third support plate, wherein the first support plate is connected to the second support plate and the third support plate respectively through a connecting member, wherein the second support plate and the third support plate are located in the same plane, wherein the second support plate and the third support plate are arranged on two adjacent sides of the first support plate, wherein the first support plate is located above the second support plate and the third support plate, wherein the angles formed by the first support plate, the second support plate and the third support plate and the connecting member are all obtuse angles, wherein the plurality of support units are parallel to each other and are arranged in the horizontal and vertical directions, wherein in two adjacent support units in the horizontal direction, the first support plate is connected to the adjacent second support plate, and in two adjacent support units in the vertical direction, the first support plate is connected to the adjacent third support plate. The present application helps to improve the bending performance of the display panel.

Description

Technical Field

[0001] The present application relates to the technical field of optoelectronic devices, and in particular to a flexible display panel and a display device. Background Art

[0002] With the development of display technology, flexible display screens are being applied in more and more forms, such as curved screens, folding screens, and rolled screens. Among them, folding screens are a major trend in the future. Folding screens are currently mainly used in folding mobile phones, folding tablets, folding computers and other folding terminal products.

[0003] In related technologies, as flexible display panels become thinner and lighter, their overall bending and impact resistance are poor. The various film layers of the flexible display panels will be bent multiple times during long-term use, causing the film layer materials of each module to withstand the alternating stress generated by folding. Therefore, module debonding and display device layer failure often occur, which affects the development of foldable products.

[0004] Therefore, there is an urgent need for a flexible display panel and a display device. Summary of the invention

[0005] In order to improve the bending performance of a display panel, the present application provides a flexible display panel and a display device.

[0006] The following technical solutions are adopted:

[0007] A flexible display panel comprises a bending layer and a display layer, wherein the bending layer is arranged on a side away from a light emitting surface of the display layer, the bending layer comprises a plurality of support units, the support units comprise a first support plate, a second support plate and a third support plate, the first support plate is respectively connected to the second support plate and the third support plate through a connecting member, the second support plate and the third support plate are located in the same plane, the second support plate and the third support plate are arranged on two adjacent sides of the first support plate, the first support plate is located above the second support plate and the third support plate, the angles formed by the first support plate, the second support plate and the third support plate and the connecting member are all obtuse angles, the plurality of support units are parallel to each other and are arranged in the horizontal and vertical directions, in two adjacent support units in the horizontal direction, the first support plate is connected to the adjacent second support plate, and in two adjacent support units in the vertical direction, the first support plate is connected to the adjacent third support plate.

[0008] By adopting the above technical solution, the display panel can be bent in the horizontal and vertical directions through the support units that are parallel to each other and arranged in the horizontal and vertical directions, and the first support plate is arranged in parallel with the second support plate and the third support plate. The support plates are connected by connecting members so that the bending stiffness of the support unit is reduced when the display panel is bent, so as to improve the bending flexibility of the flexible display panel, thereby improving the overall force uniformity of the flexible display panel, and can effectively reduce the risk of device and colloid falling off.

[0009] Optionally, the first support plate is connected to the adjacent second support plate via a shock absorbing member, and the first support plate is connected to the adjacent third support plate via a shock absorbing member.

[0010] By adopting the above technical solution, a shock absorbing member is arranged between adjacent supporting units, which can buffer vibrations and greatly reduce problems such as cracking and falling of the display panel after the display panel is vibrated.

[0011] Optionally, the first support plate, the second support plate and the third support plate are all provided with mounting holes, and the shock absorbing member is provided with positioning columns corresponding to the mounting holes.

[0012] By adopting the above technical solution, the shock absorbing component can be more stably fixed between the corresponding support plates, and the shock absorbing component can be effectively prevented from falling off.

[0013] Optionally, the material of the shock-absorbing component is one or more of foam, polyethylene, chloroprene rubber, composite pearl cotton and foamed polypropylene.

[0014] By adopting the above technical solution, the shock-absorbing parts using the above materials can play a role in buffering vibrations, thereby preventing the light board from breaking, the chip from breaking, and other problems after the light-emitting layer is vibrated.

[0015] Optionally, chamfered corners are provided at connections between the first support plate, the second support plate, the third support plate and the connecting member.

[0016] By adopting the above technical solution, a rounded corner is set at the connection between the support plate and the connecting member, which can reduce the stress concentration at the connection between the support plate and the connecting member, thereby increasing the supporting strength and anti-deformation ability of the supporting unit as a whole.

[0017] Optionally, the angles between the first support plate, the second support plate, and the third support plate and the connecting member are all in the range of 120°-150°.

[0018] By adopting the above technical solution, when the angle between the support plate and the connecting member is within this range, it can not only ensure that the support unit has good bending performance, but also make the support unit have a thinner thickness, which can achieve the effect of reducing the thickness and weight of the display panel.

[0019] Optionally, a bonding layer is provided on a side of the support unit in contact with the display layer, and the bonding layer is used to bond the display layer and the support unit together.

[0020] By adopting the above technical solution, an adhesive layer is provided to make the connection between the support unit and the display layer more stable, so as to avoid the support unit falling off due to bending of the display panel.

[0021] Optionally, the display layer includes a substrate, a driving circuit layer, a light-emitting layer, a functional layer and a packaging layer which are stacked in sequence from bottom to top.

[0022] By adopting the above technical solution, an encapsulation layer is provided to prevent water and oxygen from invading, thereby protecting other film layers in the display panel. The functional layer is used to adjust the light emitted by the light-emitting layer, thereby improving the performance of the display panel.

[0023] Optionally, the functional layer includes an organic insulating film and a polarizing film.

[0024] By adopting the above technical solution, a polarizing film is provided to remove stray light mixed in the light emitted by the light-emitting layer, and an organic insulating film is provided to reduce crosstalk that affects the display effect.

[0025] A display device comprises the above-mentioned flexible display panel.

[0026] By adopting the above technical solution and applying the above flexible display panel to a display device, the bending flexibility of the display device can be effectively improved, thereby improving the overall force uniformity of the display device and reducing the risk of device and colloid falling off.

[0027] In summary, the present application includes at least one of the following beneficial technical effects:

[0028] 1. The display panel can be bent in the horizontal and vertical directions by supporting units that are parallel to each other and arranged in the horizontal and vertical directions, and the first supporting plate is arranged in parallel with the second supporting plate and the third supporting plate, and the supporting plates are connected by connecting members so that the bending stiffness of the supporting unit is reduced when the display panel is bent, so as to improve the bending flexibility of the flexible display panel, thereby improving the uniformity of the overall force of the flexible display panel, and can effectively reduce the risk of device and colloid falling off;

[0029] 2. When the angle between the support plate and the connecting member is within this range, the support unit can be ensured to have a good bending performance while having a thinner thickness, which can achieve the effect of reducing the thickness and weight of the display panel;

[0030] 3. Shock-absorbing parts are arranged between adjacent supporting units to buffer vibrations, so that the display panel can be greatly reduced from breaking and falling off after being vibrated. Chamfered corners are arranged at the connection between the supporting plate and the connecting member to reduce the concentration of force at the connection between the supporting plate and the connecting member, thereby increasing the supporting strength and anti-deformation ability of the supporting unit as a whole, and further improving the shock-absorbing performance of the supporting frame. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a structural schematic diagram of a flexible display panel provided by the present application;

[0032] Figure 2 yes Figure 1 The enlarged view of point A in the middle;

[0033] Figure 3 yes Figure 1 A top view of the bending layer at A in the middle;

[0034] Figure 4 It is a structural schematic diagram of the support unit provided in this application.

[0035] Explanation of the accompanying drawings: 1. bending layer; 11. supporting unit; 111. first supporting plate; 112. second supporting plate; 113. third supporting plate; 114. connecting member; 115. shock absorbing member; 116. mounting hole; 117. positioning column; 118. bonding layer; 119. opening; 2. display layer; 21. substrate; 22. driving circuit layer; 23. light-emitting layer; 24. functional layer; 241. organic insulating film; 242. polarizing film; 25. encapsulation layer. DETAILED DESCRIPTION

[0036] The following is combined with Figure 1-4 The present application provides a flexible display panel for further detailed description. The following embodiments are used to illustrate the present invention, but are not used to limit the scope of the present invention.

[0037] In the description of the present invention, it is necessary to understand that the terms "middle", "upper", "lower", "front", "back", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0038] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0039] refer to Figures 1 to 4 This embodiment provides a flexible display panel, including a bending layer 1 and a display layer 2.

[0040] The bending layer 1 is arranged on the side away from the light emitting surface of the display layer 2, and the bending layer 1 includes a plurality of support units 11. The support units 11 are made of heat dissipation materials, such as aluminum alloy, so that the support units 11 can conduct the heat emitted by the light emitting layer while supporting the light emitting layer, thereby playing a role in heat dissipation.

[0041] The support unit 11 includes a first support plate 111, a second support plate 112 and a third support plate 113. The first support plate 111 is connected to the second support plate 112 through a connecting member 114. The first support plate 111 is connected to the third support plate 113 through a connecting member 114. The second support plate 112 and the third support plate 113 are located in the same plane. The second support plate 112 and the third support plate 113 are arranged on two adjacent sides of the first support plate 111. The first support plate 111 is located above the second support plate 112 and the third support plate 113. The angle formed by the first support plate 111 and the connecting member 114 is an obtuse angle, the angle formed by the second support plate 112 and the connecting member 114 is also an obtuse angle, and the angle formed by the third support plate 113 and the connecting member 114 is also an obtuse angle. The multiple support units 11 are parallel to each other and arranged in the X direction and the Y direction. In two adjacent support units 11 in the X direction, the first support plate 111 is connected to the adjacent second support plate 112, and in two adjacent support units 11 in the Y direction, the first support plate 111 is connected to the adjacent third support plate 113.

[0042] The display panel can be bent in the horizontal and vertical directions by supporting units 11 that are parallel to each other and arranged in the horizontal and vertical directions, and the first supporting plate 111 is arranged in parallel with the second supporting plate 112 and the third supporting plate 113. The supporting plates are connected by a connecting member 114 so that the bending stiffness of the supporting unit 11 is reduced when the display panel is bent, so as to improve the bending flexibility of the flexible display panel, thereby improving the overall force uniformity of the flexible display panel, and can effectively reduce the risk of device and colloid falling off.

[0043] refer to Figure 2In this embodiment, a plurality of adjacent support units 11 are connected through the shock absorber 115, the first support plate 111 is connected to the adjacent second support plate 112 through the shock absorber 115, and the first support plate 111 is connected to the adjacent third support plate 113 through the shock absorber 115. That is, the support unit 11 extends from the side of the previous shock absorber 115 close to the light-emitting layer 23 to the side of the next shock absorber 115 away from the light-emitting layer 23.

[0044] The material of the shock absorbing member 115 is any one of foam, polyethylene PE, chloroprene rubber CR, composite pearl cotton, polyurethane foam material PORON and foamed polypropylene.

[0045] By arranging the shock absorbing member 115 between adjacent supporting units 11 , it is possible to buffer the vibration, so that the display panel can be greatly reduced from being broken or falling off after being vibrated.

[0046] The first support plate 111, the second support plate 112 and the third support plate 113 are all provided with mounting holes 116, and the shock absorber 115 is provided with positioning posts 117 corresponding to the mounting holes 116. The shock absorber 115 can be more stably fixed between the corresponding support plates, and the shock absorber 115 can be effectively prevented from falling off.

[0047] refer to Figure 3 and Figure 4 The first support plate 111 of the first support unit 11 and the second support plate 112 of the second support unit 11 are correspondingly arranged, and mounting holes 116 are opened in the axial direction of the first support plate 111 of the first support unit 11 and the second support plate 112 of the second support unit 11, and the first support plate 111 of the first support unit 11 and the second support plate 112 of the second support unit 11 are fixed by positioning columns 117 protruding from the shock-absorbing member 115 corresponding to the mounting holes 116. Similarly, the first support plate 111 of the first support unit 11 and the third support plate 113 of the third support unit 11 are fixed by positioning columns 117, which will not be repeated here.

[0048] The connection between the first support plate 111, the second support plate 112 and the third support plate 113 and the connecting member 114 is provided with a rounded corner. The rounded corner is provided at the connection between the support plate and the connecting member 114, so that the connection between the support plate and the connecting member 114 can reduce the stress concentration, thereby increasing the support strength and anti-deformation capability of the support unit 11 as a whole.

[0049] In one example, triangular openings 119 are provided on both sides of the connection between the support plate and the connection member 114 . When the display panel is bent in different directions, the openings 119 can effectively reduce the influence of stress caused by the bending on the display panel.

[0050] refer to Figure 4 , the angle range θ between the first support plate 111, the second support plate 112, and the third support plate 113 and the connecting member 114 is 120°-150°. When the angle between the support plate and the connecting member 114 is within this range, it can ensure that the support unit 11 has a good bending performance while making the support unit 11 thinner, which can achieve the effect of reducing the thickness and weight of the display panel.

[0051] The side of the support unit 11 in contact with the display layer 2 is provided with an adhesive layer, and the adhesive layer is used to bond the display layer 2 and the support unit 11 together. The adhesive layer is provided to make the connection between the support unit 11 and the display layer 2 more stable, so as to prevent the support unit 11 from falling off due to bending of the display panel.

[0052] At the same time, an adhesive layer can be provided on both sides of the shock absorber 115 contacting the support plate. The adhesive layer replaces the mounting hole 116 opened on the support plate and the fixing column protruding from the shock absorber to form a fixing structure, thereby achieving mutual fixation of the support units 11 and reducing the steps of opening holes in the support plate, making it easier to fix each support unit 11.

[0053] The display layer 2 includes a substrate 21, a driving circuit layer 22, a light-emitting layer 23, a functional layer 24 and a packaging layer 25 which are stacked in sequence from bottom to top. The packaging layer 25 is provided to prevent the invasion of water and oxygen, thereby protecting the other film layers in the display panel. The functional layer 24 is used to adjust the light emitted by the light-emitting layer 23, thereby improving the performance of the display panel.

[0054] The driving circuit layer 22 may be a bendable flexible printed circuit board or a composite printed circuit board of a flexible printed circuit board and a rigid printed circuit board, and the light emitting layer 23 may be a sub-millimeter light emitting diode, an LED light source, an OLED light source, or an ordinary white light source lamp.

[0055] The functional layer 24 includes but is not limited to an organic insulating film 241 , a polarizing film 242 and an optical film material, wherein the optical film material is PET, TAC, CPI, COP, PC, PMMA and the like.

[0056] A polarizing film 242 is provided to remove stray light mixed in the light emitted by the light emitting layer 23 , an organic insulating film 241 is provided to reduce crosstalk affecting the display effect, and an optical film material is provided to further enhance the light emitting effect of the display layer 2 .

[0057] The present application also provides a display device, comprising the above-mentioned flexible display panel.

[0058] In this embodiment, the flexible display panel can be an organic light-emitting diode display panel (Organic Light-Emitting Diode, OLED), a light-emitting diode display panel (Light-Emitting Diode, LED) and a liquid crystal display panel, and this embodiment does not make any specific restrictions on this.

[0059] Applying the above-mentioned flexible display panel to a display device can effectively improve the bending flexibility of the display device, thereby improving the overall force uniformity of the display device, thereby reducing the risk of device and colloid falling off.

[0060] The embodiments of this specific implementation method are all preferred embodiments of the present application, and are not intended to limit the protection scope of the present application. Therefore, all equivalent changes made based on the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A flexible display panel, characterized in that: A bending layer (1) and a display layer (2), wherein the bending layer (1) is arranged on a side away from a light emitting surface of the display layer (2), the bending layer (1) comprises a plurality of support units (11), the support units (11) comprise a first support plate (111), a second support plate (112) and a third support plate (113), the first support plate (111) is respectively connected to the second support plate (112) and the third support plate (113) via a connecting member (114), the second support plate (112) and the third support plate (113) are located in the same plane, the second support plate (112) and the third support plate (113) are arranged on two adjacent sides of the first support plate (111), and the first support plate (111) is located between the second support plate (112) and the third support plate (113). The display layer (113) is a top surface of the display unit (114), and the angles formed by the first support plate (111), the second support plate (112), and the third support plate (113) and the connecting member (114) are all obtuse angles. The plurality of support units (11) are parallel to each other and are arranged in the horizontal and vertical directions. In two adjacent support units (11) in the horizontal direction, the first support plate (111) is connected to the adjacent second support plate (112). In two adjacent support units (11) in the vertical direction, the first support plate (111) is connected to the adjacent third support plate (113). A bonding layer (118) is provided on the side of the support unit (11) in contact with the display layer (2). The bonding layer (118) is used to bond the display layer (2) and the support unit (11) together.

2. The flexible display panel according to claim 1, characterized in that: The first support plate (111) is connected to the adjacent second support plate (112) via a shock absorbing member (115), and the first support plate (111) is connected to the adjacent third support plate (113) via a shock absorbing member (115).

3. The flexible display panel according to claim 2, characterized in that: The first support plate (111), the second support plate (112) and the third support plate (113) are all provided with mounting holes (116), and the shock absorbing member (115) is provided with positioning columns (117) corresponding to the mounting holes (116).

4. The flexible display panel according to claim 2, characterized in that: The material of the shock absorbing member (115) is one or more of foam, polyethylene, chloroprene rubber, composite pearl cotton and foamed polypropylene.

5. The flexible display panel according to claim 1, characterized in that: The connection points between the first support plate (111), the second support plate (112) and the third support plate (113) and the connecting member (114) are provided with rounded corners.

6. The flexible display panel according to claim 1, characterized in that: The included angles between the first support plate (111), the second support plate (112) and the third support plate (113) and the connecting member (114) are all in the range of 120°-150°.

7. The flexible display panel according to claim 1, characterized in that: The display layer (2) comprises a substrate (21), a drive circuit layer (22), a light-emitting layer (23), a functional layer (24), and a packaging layer (25) which are stacked in sequence from bottom to top.

8. The flexible display panel according to claim 7, characterized in that: The functional layer (24) includes an organic insulating film (241) and a polarizing film (242).

9. A display device, characterized in that: A flexible display panel comprising any one of claims 1 to 8.

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