Flexible pad

Abstract

The present invention relates to the technical field of display screens, and discloses a flexible pad. The flexible pad has a bottom surface, a contact curved surface, a first side surface, a second side surface, a third side surface and a fourth side surface; the contact curved surface is used for fitting with a display panel, and the bottom surface is disposed opposite to the contact curved surface; the first side surface and the second side surface are disposed opposite to each other, and the third side surface and the fourth side surface are disposed opposite to each other; the direction of the line connecting the first side surface and the second side surface is the first direction, and in the first direction, the distance between the third side surface and the fourth side surface gradually increases from the middle to both sides; during the fitting process of the flexible pad and the display panel, the third side surface and the fourth side surface will expand towards both sides under the action of pressure and approach to form a plane, thereby reducing the pressure gradient at the four corners of the contact curved surface of the flexible pad, thus preventing the formation of a low-pressure area at the four corners of the contact curved surface of the flexible pad, reducing the defects generated when the flexible pad is fitted with the display panel, improving the service life of the flexible pad, and reducing the use cost.

Description

[0001] This application is a divisional application. The application number of the original application is 202011495090.8, the filing date of the original application is December 17, 2020, and the title of the original application is "Flexible Pad and Display Device". The entire content of the original application is incorporated herein by reference. Technical Field

[0002] The present invention relates to the technical field of display screens, and in particular to a flexible pad. Background Art

[0003] The flexible pad is a key component for curved surface fitting, and the lifespan of the flexible pad directly affects the yield and performance of the display device.

[0004] In the prior art, a clip is usually used to copy the shape of the flexible pad, and then the flexible pad is attached to the display panel.

[0005] However, since the contact curved surface and width between the flexible pad after being profiled by the clip and the display panel are limited, it is easy to cause the pressing-in amount and the fitting pressure of the flexible pad to be very large when the flexible pad is attached to the display panel, resulting in defects in the flexible pad during fitting, thereby reducing the lifespan of the flexible pad, and thus increasing the use cost of the flexible pad. Summary of the Invention

[0006] The present invention provides a flexible pad, which can reduce the defects generated when the flexible pad is attached to the display panel, thereby improving the lifespan of the flexible pad and reducing the use cost of the flexible pad.

[0007] To achieve the above object, the present invention provides the following technical solutions:

[0008] A flexible pad for attaching to a display panel, the flexible pad having a bottom surface, a contact curved surface, a first side surface, a second side surface, a third side surface, and a fourth side surface; wherein, the contact curved surface is used for attaching to the display panel, and the bottom surface is disposed opposite to the contact curved surface; the first side surface and the second side surface are disposed opposite to each other, and the third side surface and the fourth side surface are disposed opposite to each other; the direction of the line connecting the first side surface and the second side surface is the first direction, and in the first direction, the distance between the third side surface and the fourth side surface gradually increases from the middle to both sides.

[0009] For the flexible pad provided by the present invention, since in the first direction, the distance between the third side surface and the fourth side surface gradually increases from the middle to both sides, and during the process of attaching the flexible pad to the display panel, the third side surface and the fourth side surface will deform under the action of pressure and expand towards both sides, then the third side surface and the fourth side surface approach to form a plane as the fitting progresses, thereby reducing the pressing-in amount of the flexible pad and reducing the pressure gradient at the four corners of the contact curved surface of the flexible pad.

[0010] Therefore, this setting method can prevent the formation of low-pressure areas at the four corners of the contact surface of the flexible pad, prevent the generation of air bubbles, thereby reducing the defects generated when the flexible pad is attached to the display panel, improving the lifespan of the flexible pad, and reducing the usage cost of the flexible pad.

[0011] Optionally, in the first direction, the distance between the third side surface and the fourth side surface gradually and uniformly increases from the middle to both sides.

[0012] Optionally, in the first direction, the distance between the bottom surface and the contact surface gradually decreases from the middle to both sides.

[0013] Optionally, in the first direction, the distance between the bottom surface and the contact surface gradually and uniformly decreases from the middle to both sides.

[0014] Optionally, the connection direction between the third side surface and the fourth side surface is the second direction, and the connection direction between the bottom surface and the contact surface is the third direction; the flexible pad has a plurality of cross-sections arranged uniformly along the first direction; the area difference between any two adjacent cross-sections in the third direction is equal to the area difference between the two adjacent cross-sections in the second direction.

[0015] Optionally, in the first direction, the relational expression of the area difference between any two adjacent cross-sections in the third direction and the area difference between the two adjacent cross-sections in the second direction is: ΔS hi =ΔS wli +ΔS wri ; where, ΔS hi is the area difference between two adjacent cross-sections in the third direction; ΔS wli is the area difference of the left side of two adjacent cross-sections in the second direction; ΔS wri is the area difference of the right side of two adjacent cross-sections in the second direction.

[0016] Optionally, the first side surface or the second side surface of the flexible pad has a decompression hole corresponding to the opening of the display panel.

[0017] Optionally, the material of the flexible pad is silica gel.

[0018] A display device includes any one of the above flexible pads. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a schematic structural diagram of the flexible pad provided by an embodiment of the present invention;

[0020] Figure 2 is a top view of the flexible pad provided by an embodiment of the present invention;

[0021] Figure 3 is a front view of the flexible pad provided by an embodiment of the present invention;

[0022] Figure 4 Schematic cross-sectional view of the flexible pad provided by the embodiment of the present invention in the first direction;

[0023] Figure 5 Schematic diagram of the positional relationship when the flexible pad provided by the embodiment of the present invention is attached to the display panel.

[0024] Icons: 1 - bottom surface; 2 - contact curved surface; 3 - first side surface; 4 - second side surface; 5 - third side surface; 6 - fourth side surface; 7 - cross-section; 8 - pressure relief hole. Detailed implementation manners

[0025] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0026] Figure 1 Schematic structural diagram of the flexible pad provided by the embodiment of the present invention; Figure 2 Top view of the flexible pad provided by the embodiment of the present invention; Figure 3 Front view of the flexible pad provided by the embodiment of the present invention; As Figures 1 - 3 shown, the flexible pad provided by the embodiment of the present invention is used to be attached to the display panel. The flexible pad has a bottom surface 1, a contact curved surface 2, a first side surface 3, a second side surface 4, a third side surface 5, and a fourth side surface 6; wherein, the contact curved surface 2 is used to be attached to the display panel, and the bottom surface 1 is disposed opposite to the contact curved surface 2; the first side surface 3 is disposed opposite to the second side surface 4, and the third side surface 5 and the fourth side surface 6 are disposed opposite to each other; the connection direction between the first side surface 3 and the second side surface 4 is the first direction, as Figure 2 shown by the vertical dotted double-headed arrow in the figure, in the first direction, the distance between the third side surface 5 and the fourth side surface 6 gradually increases from the middle to both sides.

[0027] For the flexible pad provided in this embodiment, since in the first direction, the distance between the third side surface 5 and the fourth side surface 6 gradually increases from the middle to both sides, and during the process of attaching the flexible pad to the display panel, the third side surface 5 and the fourth side surface 6 will deform under the action of pressure and expand to both sides, then the third side surface 5 and the fourth side surface 6 approach to form a plane as the attachment progresses, thereby reducing the penetration amount of the flexible pad and reducing the pressure gradient at the four corners of the contact curved surface 2 of the flexible pad.

[0028] Therefore, this setting method can prevent the contact surface 2 of the flexible pad from forming a low-pressure area at the four corners, prevent the generation of air bubbles, thereby reducing the defects generated when the flexible pad is attached to the display panel, improving the lifespan of the flexible pad, and reducing the usage cost of the flexible pad.

[0029] Reference Figure 2 , as an alternative embodiment, in the first direction, the distance between the third side surface 5 and the fourth side surface 6 gradually and uniformly increases from the middle to both sides.

[0030] In this embodiment, since in the first direction, the distance between the third side surface 5 and the fourth side surface 6 gradually and uniformly increases from the middle to both sides, when the flexible pad is attached to the display panel, the expansion amounts of the third side surface 5 and the fourth side surface 6 towards both sides are consistent, so that when the flexible pad can be attached to the display panel, the force can be evenly distributed.

[0031] This setting method can make the third side surface 5 and the fourth side surface 6 of the flexible pad be evenly extruded, so as to ensure that the contact surface 2 of the flexible pad can deform uniformly, and further avoid the formation of a low-pressure area at the four corners of the contact surface 2. Therefore, it can further reduce the defects generated when the flexible pad is attached to the display panel, further improve the lifespan of the flexible pad, and further reduce the usage cost of the flexible pad.

[0032] Reference Figure 3 , as an alternative embodiment, in the first direction, the distance between the bottom surface 1 and the contact surface 2 gradually decreases from the middle to both sides.

[0033] In this embodiment, since in the first direction, the distance between the bottom surface 1 and the contact surface 2 gradually decreases from the middle to both sides, and the distance between the third side surface 5 and the fourth side surface 6 gradually and uniformly increases from the middle to both sides; during the process of attaching the flexible pad to the display panel, the contact surface 2 will be extruded to deform and spread from the center to the periphery, further reducing the indentation amount of the flexible pad, thus better relieving the pressure between the contact surface 2 and the display panel, and further playing a role in reducing the pressure on the flexible pad.

[0034] Reference Figure 3 , as an alternative embodiment, in the first direction, the distance between the bottom surface 1 and the contact surface 2 gradually and uniformly decreases from the middle to both sides.

[0035] In this embodiment, similarly, in the first direction, the distance between the bottom surface 1 and the contact curved surface 2 gradually and uniformly decreases from the middle to both sides, and the distance between the third side surface 5 and the fourth side surface 6 gradually and uniformly increases from the middle to both sides. During the process of the flexible pad being attached to the display panel, the deformation generated due to the extrusion of the contact curved surface 2 will be more uniform, that is to say, the contact curved surface 2 will uniformly spread from the center to the periphery.

[0036] This setting method can make the contact curved surface 2 of the flexible pad be evenly extruded to generate uniform deformation, further avoiding the formation of low-pressure areas at the four corners of the contact curved surface 2. Therefore, it can further reduce the defects generated when the flexible pad is attached to the display panel, thereby further improving the service life of the flexible pad and further reducing the use cost of the flexible pad.

[0037] Figure 4 It is a schematic cross-sectional view of the flexible pad provided by the embodiment of the present invention in the first direction. Refer to Figures 2 - 4 , as an optional embodiment, the connection direction between the third side surface 5 and the fourth side surface 6 is the second direction, as shown by the horizontal dotted double-headed arrow in Figure 2 ; the connection direction between the bottom surface 1 and the contact curved surface 2 is the third direction, as shown by the dotted double-headed arrow in Figure 3 ; the flexible pad has a plurality of cross-sections 7 uniformly arranged in the first direction; the area difference between any two adjacent cross-sections 7 in the third direction is equal to the area difference between two adjacent cross-sections 7 in the second direction.

[0038] In the first direction, the relational expression of the area difference between any two adjacent cross-sections 7 in the third direction and the area difference between two adjacent cross-sections 7 in the second direction is:

[0039] ΔS hi =ΔS wli +ΔS wri …………………………………………… Formula (1);

[0040] In Formula (1), ΔS hi is the area difference between two adjacent cross-sections 7 in the third direction; ΔS wli is the area difference between the left sides of two adjacent cross-sections 7 in the second direction; ΔS wri is the area difference between the right sides of two adjacent cross-sections 7 in the second direction.

[0041] In addition, it should be noted that if the flexible pad has n cross-sections 7 uniformly arranged in the first direction, according to Lagrange's theorem, the expression for the fitting contact pressure that can be reduced by setting n cross-sections is:

[0042]

[0043] In formula (2), F normal is the contact pressure that can be reduced by setting n cross sections, x i is the height difference between two adjacent sections (i.e. the difference in the third direction), k i is the contact stiffness corresponding to the height difference between two adjacent sections, and λ is the additional factor.

[0044] Figure 5 Schematic diagram of the positional relationship between the flexible pad and the display panel provided by the embodiment of the present invention when they are attached, refer to Figure 1 and Figure 5 As an optional embodiment, the first side surface 3 or the second side surface 4 of the flexible pad has a pressure relief hole 8 corresponding to the opening of the display panel.

[0045] In the present embodiment, since the pressure relief hole 8 is arranged corresponding to the opening of the display panel, it plays a role of unloading force. Therefore, when the flexible pad and the display panel are bonded together, the contact pressure between the two can be further reduced, thereby more effectively preventing the flexible pad from having defects during bonding, and more effectively improving the life of the flexible pad, thereby further reducing the use cost of the flexible pad.

[0046] As an optional embodiment, the material of the flexible pad is silicone.

[0047] In this embodiment, the silicone has certain tensile strength and tear strength, which meets the characteristics of the flexible pad to produce a certain deformation. In addition, the silicone has stable chemical properties and will not change its chemical properties due to squeezing, thereby affecting the performance of the overall product.

[0048] An embodiment of the present invention further provides a display device, comprising any one of the above-mentioned flexible pads.

[0049] In this embodiment, the beneficial effects of the display device are the same as those of any of the above-mentioned flexible pads, and will not be described in detail.

[0050] Obviously, those skilled in the art can make various changes and modifications to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is also intended to include these modifications and variations.

Claims

1. A flexible pad for fitting with a display panel, characterized in that, The flexible pad has a bottom surface, a contact curved surface, a first side surface, a second side surface, a third side surface, and a fourth side surface; wherein, The contact curved surface is used for fitting with the display panel, and the bottom surface is disposed opposite to the contact curved surface; The first side surface and the second side surface are disposed opposite to each other, and the third side surface and the fourth side surface are disposed opposite to each other; The first side surface or the second side surface has a pressure relief hole; The connection direction between the first side surface and the second side surface is the first direction. In the first direction, the distance between the third side surface and the fourth side surface gradually increases from the middle to both sides; The connection direction between the third side surface and the fourth side surface is the second direction, and the connection direction between the bottom surface and the contact curved surface is the third direction; The flexible pad has a plurality of cross-sections arranged uniformly along the first direction; The area difference between any two adjacent cross-sections in the third direction is equal to the area difference between the two adjacent cross-sections in the second direction; In the first direction, the relationship expression of the area difference between any two adjacent cross-sections in the third direction and the area difference between the two adjacent cross-sections in the second direction is: ； wherein, is the area difference between the cross-sections of the two adjacent ones in the third direction; is the difference in the left-side area in the second direction between the cross-sections of the two adjacent ones; is the difference in the right-side areas in the second direction of the cross-sections of the two adjacent ones.

2. The flexible pad according to claim 1, wherein, There is one pressure relief hole.

3. The flexible pad according to claim 2, wherein The display panel has an opening; When the flexible pad is fitted with the display panel, the pressure relief hole is correspondingly disposed with the opening of the display panel.

4. The flexible pad according to claim 3, wherein, In the first direction, the distance between the bottom surface and the contact curved surface gradually decreases from the middle to both sides.

5. The flexible pad according to any one of claims 1-4, characterized in that, The material of the flexible pad is silica gel.

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