Display panel and display device

Abstract

The invention provides a display panel and a display device.The display panel comprises a display substrate and a polarization layer which are arranged in a stacked mode, the display substrate comprises a display area and a bending area, and the orthographic projection of the polarization layer on the display substrate at least covers the display area; the protection film layer is arranged on the side, away from the display substrate, of the polarization layer, and the orthographic projection of the protection film layer on the display substrate at least covers the polarization layer; wherein in the first direction, the end of the protective film layer exceeds the end of the polarization layer, the first direction is perpendicular to the thickness direction of the display panel and faces the bending area, or the protective film layer comprises a first film layer section and a second film layer section, the first film layer section and the second film layer section are continuously arranged in the first direction, the first film layer section is close to the bending area, and the second film layer section is close to the bending area. And the thickness of the first film layer section is smaller than that of the second film layer section. According to the technical scheme, the crack and fracture phenomena of the bending area of the display panel can be improved, and therefore the bending performance of the display panel is improved.

Description

Technical Field

[0001] The present application relates to the technical field of display devices, and more specifically, to a display panel and a display apparatus. Background Art

[0002] With the development of information technology, display devices such as mobile phones have become an indispensable tool in people's lives, and "full screen" has become the pursuit of more and more users. In order to make the display panel achieve a full-screen display effect, the non-display area is usually bent, that is, the non-display area of ​​the display panel is bent to the back of the display panel to reduce the width of the screen frame, thereby increasing the screen-to-body ratio. When the non-display area of ​​the display panel is bent, the bending area of ​​the display panel is prone to stress concentration. In order to solve the above problem, a rubber material is coated on the bending area of ​​the display panel to form a stress neutralization layer to relieve the bending stress of the bending area of ​​the display panel.

[0003] Generally speaking, the adhesive coating position is flush with the polarizing layer, but due to the siphon phenomenon, the adhesive will be adsorbed to the protective film layer above the polarizing layer, resulting in an increase in the adhesive climbing height and uneven thickness of the stress neutralization layer. When in the bent state, the uneven thickness of the stress neutralization layer causes uneven stress in the bending area, making the bending area prone to cracks or even breakage. Summary of the Invention

[0004] In view of the above problems, embodiments of the present application provide a display panel and a display device, which can improve cracks and breakages in the bending area of ​​the display panel, thereby improving the bending performance of the display panel.

[0005] In a first aspect, a display panel is provided, comprising: a stacked display substrate and a polarizing layer, the display substrate comprising a display area and a bending area, the orthographic projection of the polarizing layer on the display substrate covering at least the display area; a protective film layer arranged on a side of the polarizing layer away from the display substrate, the orthographic projection of the protective film layer on the display substrate covering at least the polarizing layer; wherein, in a first direction, an end of the protective film layer extends beyond an end of the polarizing layer, the first direction is perpendicular to the thickness direction of the display panel and toward the bending area, or, the protective film layer comprises a first film layer segment and a second film layer segment, the first film layer segment and the second film layer segment are continuously arranged in the first direction, the first film layer segment is close to the bending area, and the thickness of the first film layer segment is less than the thickness of the second film layer segment.

[0006] In combination with the first aspect, in certain implementations of the first aspect, in the first direction, when the end of the protective film layer exceeds the end of the polarizing layer, the distance ΔL1 between the end of the protective film layer and the end of the polarizing layer ranges from 20 μm to 30 μm.

[0007] In combination with the first aspect, in certain implementations of the first aspect, the thickness of the protective film layer is greater than 50 μm.

[0008] In some implementations of the first aspect, the thickness of the first film layer section is in a range from 5 μm to 10 μm.

[0009] In some implementations of the first aspect, the size of the first film layer section in the first direction is in a range from 5 mm to 10 mm.

[0010] In some implementations of the first aspect, the thickness of the second film layer section is greater than 50 μm.

[0011] In some implementations of the first aspect, in the first direction, the end of the first film layer section is beyond the end of the polarizing layer.

[0012] In some implementations of the first aspect, in the first direction, the spacing ΔL2 between the end of the first film layer section and the end of the polarizing layer is in a range from 20 μm to 30 μm.

[0013] A second aspect provides a display device including the display panel of any possible implementation of the first aspect. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 is a schematic diagram of a display panel showing a siphon phenomenon of a glue material of a bending area of the display panel;

[0015] Figure 2 is a schematic structural diagram of a display panel disclosed by an embodiment of the present application;

[0016] Figure 3 is a schematic structural diagram of another display panel disclosed by an embodiment of the present application;

[0017] Figure 4 is a schematic structural diagram of yet another display panel disclosed by an embodiment of the present application. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the present application will be described below with reference to the drawings. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments of the present application.

[0019] The technical solutions in the embodiments of the present application will be described below with reference to the drawings. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments of the present application.

[0020] Hereinafter, the terms "first", "second", etc. are used only for the purpose of description, and should not be understood as indicating or implying relative importance or implying the number of the technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In addition, in the description of the embodiments, the meaning of "a plurality of" is two or more, unless otherwise stated.

[0021] Reference to "one embodiment" or "some embodiments" etc. described in the embodiments of the present application means that the specific features, structures or characteristics described in connection with the embodiment are included in one or more embodiments of the present application. Therefore, the statements "in one embodiment", "in some embodiments", "in other some embodiments", "in further some embodiments" etc. appearing in different places in the specification are not necessarily all referring to the same embodiment, but mean "one or more but not all embodiments", unless otherwise specifically emphasized. The terms "include", "contain", "have" and their variants mean "including but not limited to", unless otherwise specifically emphasized.

[0022] With the development of information technology, display devices such as mobile phones have become an indispensable tool in people's lives, and "full screen" has become the pursuit of more and more users. In order to make the display panel achieve the full screen display effect, the method of bending the non-display area is usually adopted, that is: the non-display area of the display panel is bent to the back of the display panel to reduce the width of the screen body frame, thereby improving the screen ratio. When the non-display area of the display panel is bent, the bending area of the display panel is prone to stress concentration. In order to solve the above problem, a stress neutralizing layer is formed on the bending area of the display panel by coating glue, so as to relieve the bending stress of the bending area of the display panel.

[0023] Generally, the glue coating position of the glue is flush with the polarizing layer, but due to the adsorption phenomenon, i.e. the siphon phenomenon, occurring on the surface of the solid polarizing layer when the liquid glue contacts the solid polarizing layer, the glue is adsorbed onto the protective film layer above the polarizing layer, so that the thickness of the glue at the starting end of the glue coating is the sum of the thicknesses of the polarizing layer and the protective film layer (much larger than the designed thickness of the stress neutralizing layer), resulting in an increased climbing height of the glue. Moreover, in an ultra-narrow bottom frame module, the reserved glue climbing area is limited, and the thickness of the glue in this limited area cannot be uniformly controlled, which leads to uneven stress on the bending area due to the uneven thickness of the stress neutralizing layer in the bending state, and the bending area is prone to cracks or even breakage.

[0024] For example, reference can be made to Figure 1, the end of the polarizing layer 12 is flush with the end of the protective film layer 13, the adhesive is coated from the position aligned with the end of the polarizing layer 12, and the adhesive coating on the bending area 112 is designed to form a glue layer structure Figure 1 , the neutral stress layer 14 in the above embodiment, but due to the siphon phenomenon, the adhesive flows to the end of the protective film layer 13, and finally forms a glue layer structure of the neutral stress layer 14 and the excess coated climbing layer 14', and the climbing height of the adhesive increases.

[0025] Therefore, the present application provides a display panel and a display device. Specifically, the display panel includes a display substrate and a polarizing layer arranged in a stack, the display substrate includes a display area and a bending area, and the polarizing layer has a normal projection on the display substrate covering at least the display area; a protective film layer arranged on a side of the polarizing layer away from the display substrate, the protective film layer covering at least the polarizing layer; and in a first direction, an end of the protective film layer exceeds an end of the polarizing layer, the first direction being perpendicular to a thickness direction of the display panel and towards the bending area, or the protective film layer includes a first film layer segment and a second film layer segment, the first film layer segment and the second film layer segment being arranged continuously in the first direction, the first film layer segment being close to the bending area, and a thickness of the first film layer segment being less than a thickness of the second film layer segment. In the present application, by making the end of the protective film layer exceed the end of the polarizing layer, when the adhesive is coated from the position aligned with the end of the polarizing layer, the adhesive can be prevented from flowing to the end of the protective film layer due to the siphon phenomenon, the climbing height of the adhesive is controlled, the thickness of the stress neutralization layer formed is uniform, the stress on the bending area is uniform, the cracking and breaking phenomenon of the bending area is improved, and the bending performance of the display panel is improved. In the present application, the protective film layer can also be divided into the first film layer segment and the second film layer segment with different thicknesses, and the thickness of the first film layer segment close to the bending area is less than the thickness of the second film layer segment, so that when the adhesive is coated from the position aligned with the end of the polarizing layer, even if the adhesive flows to the end of the first film layer segment due to the siphon phenomenon, the increase in the climbing height is only the thickness of the first film layer segment, that is, the increase in the climbing height is small, the increase in the climbing height of the adhesive is small, the thickness of the stress neutralization layer formed is uniform, the stress on the bending area is uniform, the cracking and breaking phenomenon of the bending area is improved, and the bending performance of the display panel is improved.

[0026] The present application will be described in detail below with reference to the accompanying drawings.

[0027] Figure 2 A schematic structural diagram of a display panel provided by the present application is shown.

[0028] As shown in Figure 2 , the display panel 10 includes a display substrate 11, a polarizing layer 12, and a protective film layer 13 arranged in a stack.

[0029] For example, the display substrate 11, the polarizing layer 12 and the protective film layer 13 are sequentially stacked along the thickness direction of the display panel 10. For example, the thickness direction of the display panel 10 can be Figure 2 It should be understood that the x-direction is only an exemplary description of the thickness direction of the display panel 10 and does not constitute a limitation on the thickness direction of the display panel 10 of the present application. For the convenience of description, the following description will be based on the thickness direction of the display panel 10 as the x-direction.

[0030] Specifically, if Figure 2 As shown, the display substrate 11 includes a display area 111 and a bending area 112 . The orthographic projection of the polarizing layer 12 on the display substrate 11 at least covers the display area 111 , and the orthographic projection of the protective film layer 13 on the display substrate 11 at least covers the polarizing layer 12 .

[0031] In the first direction, the end of the protective film layer 13 exceeds the end of the polarizing layer 12. The first direction is perpendicular to the x-direction and faces the bending region 112. For example, Figure 2 The y direction is shown (the direction indicated by the arrow).

[0032] It should be understood that the y direction is only an exemplary description of the first direction and does not constitute a limitation on the first direction of the present application. For the convenience of description below, the first direction is described as the y direction.

[0033] In the embodiment of the present application, by extending the end of the protective film layer 13 beyond the end of the polarizing layer 12, when the adhesive is applied at a position flush with the end of the polarizing layer 12, the end of the protective film layer 13 extends beyond the end of the polarizing layer 12, thereby preventing the adhesive from flowing toward the end of the protective film layer 13 due to a siphon phenomenon, controlling the climbing height of the adhesive, and making the thickness of the formed stress neutralization layer 14 uniform, thereby ensuring uniform stress in the bending area 112, improving cracks and fractures in the bending area 112, and thus improving the bending performance of the display panel 10.

[0034] In some embodiments, as Figure 2 As shown, in the y direction, the distance ΔL1 between the end of the protective film layer 13 and the end of the polarizing layer 12 ranges from 20 μm to 30 μm.

[0035] Specifically, the distance ΔL1 between the end of the protective film layer 13 and the end of the polarizing layer 12 can be 20 μm, 22 μm, 25 μm, 27 μm, 30 μm, or a value within the range obtained by combining any two of the above values.

[0036] In some embodiments, as Figure 2 As shown, the thickness H1 of the protective film layer 13 is greater than 50 μm, for example, 60 μm, 70 μm, 80 μm or 90 μm.

[0037] Figure 3 Another schematic structural diagram of a display panel is provided for the embodiments of the present application.

[0038] As shown in Figure 3 , the display panel 10 includes a display substrate 11, a polarizing layer 12 and a protective film layer 13 which are stacked along the x direction.

[0039] Specifically, with continued reference to Figure 3 , the protective film layer 13 includes a first film layer segment 131 and a second film layer segment 132, the first film layer segment 131 and the second film layer segment 132 are continuously arranged in the y direction, the first film layer segment 131 is close to the bending area 112, and the thickness of the first film layer segment 131 is less than the thickness of the second film layer segment 132.

[0040] In the embodiments of the present application, by dividing the protective film layer 13 into the first film layer segment 131 and the second film layer segment 132 with different thicknesses, and setting the thickness of the first film layer segment 131 close to the bending area 112 to be less than the thickness of the second film layer segment 132, when the glue starts to be coated at the position flush with the end of the polarizing layer 12, even if it flows to the end of the first film layer segment 131 due to the siphon phenomenon, the increase of the climbing height is only the thickness value of the first film layer segment 131, that is, the increase of the climbing height of the glue is small, the thickness of the stress neutralization layer 14 formed is also uniform, thereby ensuring that the stress on the bending area 112 is uniform, improving the crack and fracture phenomenon of the bending area 112, and thereby improving the bending performance of the display panel 10.

[0041] In some embodiments, the glue for forming the stress neutralization layer 14 can be MCL (Micro Coating Layer) glue. The MCL glue has high water resistance, which can prevent water vapor and other external impurities from entering the inside of the display panel to affect the stability and service life of the display panel.

[0042] In some embodiments, as shown in Figure 3 , the thickness H2 of the first film layer segment 131 ranges from 5 μm to 10 μm.

[0043] Specifically, the thickness H2 of the first film layer segment 131 can be 5 μm, 6 μm, 7 μm, 8 μm, 9 μm, 10 μm, or a value within the range obtained by any two of the above combinations.

[0044] In some embodiments, as shown in Figure 3 , the size L1 of the first film layer segment 131 in the y direction ranges from 5 mm to 10 mm.

[0045] Specifically, the size L1 of the first film layer section 131 in the y direction can be 5 mm, 6 mm, 7 mm, 8 mm, 9 mm, 10 mm, or a value within a range obtained by combining any two of the above values.

[0046] In some embodiments, as shown in Figure 3 The thickness H3 of the second film layer section 132 can be greater than 50 μm. For example, it can be 60 μm, 70 μm, 80 μm, or 90 μm.

[0047] In the embodiments of the present application, by setting the thickness of the first film layer section 132 to be less than the thickness of the second film layer section 132, the increase in the ramp height of the starting end of the adhesive coating is reduced, the problem of uneven thickness of the stress neutral layer 14 is improved, and the cracking and breaking phenomenon of the bending area 112 is further improved. However, the thickness of the protective film layer 13 must also be ensured, so that the flatness of the polarizing layer 12 can be ensured by the arrangement of the protective film layer 13. Therefore, the thickness H3 of the second film layer section 132 is set to be greater than 50 μm to ensure the flatness of the polarizing layer 12.

[0048] In some embodiments, as shown in Figure 4 In the y direction, the end of the first film layer section 131 extends beyond the end of the polarizing layer 12.

[0049] In some embodiments, continuing to refer to Figure 4 In the y direction, the spacing ΔL2 between the end of the first film layer section 131 and the end of the polarizing layer 12 is in the range of 20 μm to 30 μm.

[0050] Specifically, the spacing ΔL2 between the end of the first film layer section 131 and the end of the polarizing layer 12 can be 20 μm, 22 μm, 25 μm, 27 μm, 30 μm, or a value within a range obtained by combining any two of the above values.

[0051] In some embodiments, as shown in Figures 2 to 4 The display panel 10 can further include a heat dissipation layer 15 arranged on a side of the display substrate 11 away from the polarizing layer 12, and a normal projection of the heat dissipation layer 15 on the display substrate 11 covers at least the display area 111.

[0052] The heat dissipation layer 15 can dissipate heat for the display area 111 to avoid the use temperature of the display panel 10 being too high.

[0053] In some embodiments, the material of the heat dissipation layer can be short-cutting carbon fiber (SCF), which has good heat dissipation performance and is conducive to heat dissipation for the display area 111.

[0054] In some embodiments, as shown in Figures 2 to 4As shown, the display panel 10 can further include a support layer 16 disposed between the display area 112 and the heat dissipation layer 15.

[0055] The embodiments of the present application also provide a display device including the display panel in any of the possible implementation embodiments.

[0056] The display device can be a display device such as an OLED display, and any product or component having a display function such as a television, a digital camera, a mobile phone, a tablet computer, and the like, which includes the display device.

[0057] The above is merely specific implementation of the present application, but the protection scope of the present application is not limited thereto, any person skilled in the art can easily think of changes or replacements within the technical range disclosed by the present application, which should be covered in the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A display panel, characterized by, Comprising: a display substrate (11) and a polarizing layer (12) arranged in a stack, the display substrate (11) comprising a display area (111) and a bending area (112), the polarizing layer (12) having a projection on the display substrate (11) covering at least the display area (111); a protective film layer (13) arranged on a side of the polarizing layer (12) away from the display substrate (11), the protective film layer (13) having a projection on the display substrate (11) covering at least the polarizing layer (12); wherein, in a first direction perpendicular to a thickness direction of the display panel and towards the bending area (112), an end of the protective film layer (13) is beyond an end of the polarizing layer (12), or the protective film layer (13) comprises a first film layer segment (131) and a second film layer segment (132), the first film layer segment (131) and the second film layer segment (132) are arranged continuously in the first direction, the first film layer segment (131) is close to the bending area (112), and a thickness of the first film layer segment (131) is less than a thickness of the second film layer segment (132).

2. The display panel of claim 1, wherein, In the first direction, in the case where the end of the protective film layer (13) is beyond the end of the polarizing layer (12), a spacing ΔL1 between the end of the protective film layer (13) and the end of the polarizing layer (12) is in a range of 20 μm to 30 μm.

3. The display panel of claim 2, wherein, A thickness H1 of the protective film layer (13) is greater than 50 μm.

4. The display panel of claim 1, wherein, A thickness H2 of the first film layer segment (131) is in a range of 5 μm to 10 μm.

5. The display panel of claim 1 or 4, wherein, A size L1 of the first film layer segment (131) in the first direction is in a range of 5 mm to 10 mm.

6. The display panel of any one of claims 1, 4 and 5, wherein, A thickness H3 of the second film layer segment (132) is greater than 50 μm.

7. The display panel of any of claims 1, 4-6, wherein, In the first direction, the end of the first film layer segment (131) is beyond the end of the polarizing layer (12).

8. The display panel of claim 7, wherein, In the first direction, a spacing ΔL2 between the end of the first film layer segment (131) and the end of the polarizing layer (12) is in a range of 20 μm to 30 μm.

9. A display device, characterized by comprising: The display panel as claimed in any one of claims 1 to 8.

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