Display module and display device

Abstract

Disclosed in the present application are a display module and a display device. A bonding surface is provided on the side of a cover plate close to the display panel, and comprises a first flat surface and a first curved surface connected to the peripheral side of the first flat surface. A bonding arc area is provided on the side of the first curved surface close to the first flat surface; and in the bonding arc area, the average curvature radius of the area of a corner curved surface away from a lateral side curved surface to which the corner curved surface is connected is greater than the average curvature radius of the area of the corner curved surface close to the lateral side curved surface to which the corner curved surface is connected.

Description

Display module and display device Technical Field

[0001] The present application relates to the field of display technology, and in particular to a display module and a display device. Background Art

[0002] With the change of people's aesthetic level and the development of mobile terminal products, people are gradually pursuing the appearance of mobile phone terminals with rounded curves. Many curved screen terminals have appeared in the market. The current multi-curved screens are all curved on two sides, that is, hyperbolic. There are many hyperbolic products and the technical research is becoming more and more perfect. However, the quad-curved screen has gradually become a market hotspot due to its advantages such as more beautiful curves, differentiated appearance and no borders on all four sides. The quad-curved screen is also one of the inevitable trends in the development of mobile phone terminals.

[0003] In a four-curved screen, wrinkles are more likely to occur in the curved area, especially in the corner area. SUMMARY OF THE INVENTION

[0004] Embodiments of the present application provide a display module and a display device that can reduce the probability of wrinkles forming in the curved areas of a four-curved display panel.

[0005] An embodiment of the present application provides a display module, comprising:

[0006] Display panel;

[0007] a cover plate disposed on one side of the display panel, wherein a bonding surface is provided on a side of the cover plate close to the display panel, the bonding surface comprising a first flat surface and a first curved surface connected to a circumference of the first flat surface, the display panel being bonded to the first flat surface and at least a portion of the first curved surface;

[0008] Among them, one end of the first curved surface is connected to the first plane, and the other end of the first curved surface is bent toward the side close to the display panel. The first curved surface includes multiple side curved surfaces and a corner curved surface connected between two adjacent side curved surfaces. A fitting arc area is provided on the side of the first curved surface close to the first plane; within the fitting arc area, the average curvature radius of the corner curved surface in the area away from the side curved surface to which it is connected is greater than the average curvature radius of the corner curved surface in the area close to the side curved surface to which it is connected.

[0009] In accordance with the above-mentioned purpose of the present application, an embodiment of the present application further provides a display device, wherein the display device includes a display module, and the display module includes:

[0010] Display panel;

[0011] a cover plate disposed on one side of the display panel, wherein a bonding surface is provided on a side of the cover plate close to the display panel, the bonding surface comprising a first flat surface and a first curved surface connected to a circumference of the first flat surface, the display panel being bonded to the first flat surface and at least a portion of the first curved surface;

[0012] Among them, one end of the first curved surface is connected to the first plane, and the other end of the first curved surface is bent toward the side close to the display panel. The first curved surface includes multiple side curved surfaces and a corner curved surface connected between two adjacent side curved surfaces. A fitting arc area is provided on the side of the first curved surface close to the first plane; within the fitting arc area, the average curvature radius of the corner curved surface in the area away from the side curved surface to which it is connected is greater than the average curvature radius of the corner curved surface in the area close to the side curved surface to which it is connected. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] FIG1 is a schematic diagram of a partial structure of a display module provided in an embodiment of the present application;

[0014] FIG2 is a schematic structural diagram of a cover plate provided in an embodiment of the present application;

[0015] FIG3 is a schematic structural diagram of a display module provided in an embodiment of the present application;

[0016] FIG4 is a schematic structural diagram of a cover plate at a first curved surface provided by an embodiment of the present application;

[0017] FIG5 is a curvature variation curve diagram of a corner surface in a fitting arc area provided by an embodiment of the present application;

[0018] FIG6 is a schematic diagram of a curvature radius distribution of the cover plate at the first curved surface provided in an embodiment of the present application. Modes for Carrying Out the Invention

[0019] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the embodiments described are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without making creative efforts are within the scope of protection of this application.

[0020] The disclosure below provides many different embodiments or examples for realizing different structures of the present application. In order to simplify the disclosure of the present application, the components and settings of specific examples are described below. Of course, they are merely examples and are not intended to limit the present application. In addition, the present application may repeat reference numbers and / or reference letters in different examples, and such repetition is for the purpose of simplicity and clarity, and does not itself indicate the relationship between the various embodiments and / or settings discussed. In addition, the present application provides examples of various specific processes and materials, but those of ordinary skill in the art will appreciate the application of other processes and / or the use of other materials.

[0021] An embodiment of the present application provides a display module. Please refer to Figures 1 and 2. The display module includes a display panel 10 and a cover plate 20; the cover plate 20 is arranged on one side of the display panel 10, and a bonding surface 30 is provided on the side of the cover plate 20 close to the display panel 10. The bonding surface 30 includes a first plane 31 and a first curved surface 32 connected to the peripheral side of the first plane 31. The display panel 10 is bonded to the first plane 31 and at least a portion of the first curved surface 32.

[0022] Among them, one end of the first curved surface 32 is connected to the first plane 31, and the other end is bent toward the side close to the display panel 10. The first curved surface 32 includes multiple side curved surfaces 321 and a corner curved surface 322 connected between two adjacent side curved surfaces 321. A fitting arc area 201 is provided on the side of the first curved surface 32 close to the first plane 31; within the fitting arc area 201, the average curvature radius of the corner curved surface 322 in the area away from the side curved surface 321 to which it is connected is greater than the average curvature radius of the corner curved surface 322 in the area close to the side curved surface 321 to which it is connected.

[0023] During the implementation and application process, the embodiment of the present application makes a differentiated design for the curvature radius of the corner curved surface 322, so that in the fitting arc area 201, the average curvature radius of the corner curved surface 322 away from the side curved surface 321 is greater than the average curvature radius of the corner curved surface 322 close to the side curved surface 321, thereby reducing the compression of the display panel 10 at the corner curved surface 322, and the closer to the center of the corner curved surface 322, the greater the degree of reduction in the compression of the display panel 10, thereby reducing the probability of wrinkles when the display panel 10 and the corner curved surface 322 are fitted, thereby improving the yield rate of the display module.

[0024] In one embodiment of the present application, within the fitting arc area, the corner curved surface includes a plurality of sub-portions, one end of each sub-portion is connected to the first plane, and the other end of each sub-portion extends in a direction away from the first plane;

[0025] Among them, the multiple sub-sections include a central sub-section, and the extension direction of the central sub-section has a preset angle with the boundary line between the corner curved surface and the side curved surface, and the preset angle includes 45°. In the fitting arc area, the average curvature radius of the central sub-section is greater than the average curvature radius of other sub-sections in the corner curved surface.

[0026] In one embodiment of the present application, within the fitting arc area, the average curvature radius of each of the sub-portions decreases as the distance between each of the sub-portions and the central sub-portion increases.

[0027] In one embodiment of the present application, within the fitting arc area, the plurality of sub-sections further include a first sub-section, a second sub-section located between the first sub-section and the side curved surface, and a third sub-section located between the second sub-section and the side curved surface. In the same corner curved surface, the distance between the first sub-section and the central sub-section is smaller than the distance between the second sub-section and the central sub-section, and the distance between the second sub-section and the central sub-section is smaller than the distance between the third sub-section and the central sub-section.

[0028] The average curvature radius of the first sub-section is greater than the average curvature radius of the second sub-section, the average curvature radius of the second sub-section is greater than the average curvature radius of the third sub-section, and the difference between the average curvature radius of the first sub-section and the average curvature radius of the second sub-section is greater than the difference between the average curvature radius of the second sub-section and the average curvature radius of the third sub-section.

[0029] In one embodiment of the present application, the second subsection is directly connected between the first subsection and the third subsection.

[0030] In one embodiment of the present application, within the fitting arc area, the average curvature radius of the corner curved surface is greater than the average curvature radius of the side curved surface.

[0031] In one embodiment of the present application, within the fitting arc area, the curvature radius of the first curved surface in a direction away from the first plane remains unchanged;

[0032] Alternatively, in the fitting arc area, the curvature radius of the first curved surface on a side away from the first plane is smaller than the curvature radius of the first curved surface on a side close to the first plane.

[0033] In one embodiment of the present application, the first curved surface further includes at least one non-fitting arc region located on a side of the fitting arc region away from the first plane, and an average curvature radius of the first curved surface in the fitting arc region is greater than an average curvature radius of the first curved surface in the non-fitting arc region;

[0034] The display panel is bonded to the first plane and the first curved surface within the bonding arc area, and the edge of the display panel does not exceed the boundary line between the bonding arc area and the non-bonding arc area.

[0035] In one embodiment of the present application, the first curved surface includes a plurality of non-bonding arc areas arranged on the side of the bonding arc area away from the first plane, and between two adjacent non-bonding arc areas, the average curvature radius of the first curved surface in one of the non-bonding arc areas close to the bonding arc area is greater than the average curvature radius of the first curved surface in one of the non-bonding arc areas away from the bonding arc area.

[0036] In one embodiment of the present application, the number of the non-fitting arc areas at the corner curved surface is less than or equal to the number of the non-fitting arc areas at the side curved surface.

[0037] In one embodiment of the present application, the number of the non-fitting arc areas of the corner surface away from the side curved surface connected thereto is smaller than the number of the non-fitting arc areas of the corner surface close to the side curved surface connected thereto.

[0038] In one embodiment of the present application, in the direction away from the first plane along the fitting arc area, the rate of change of the curvature radius of the first curved surface in the fitting arc area is less than the rate of change of the curvature radius of the first curved surface in the two adjacent non-fitting arc areas.

[0039] In one embodiment of the present application, the curvature radius of the first curved surface in the fitting arc area is greater than or equal to 1.5 mm, and the curvature radius of the first curved surface in the non-fitting arc area is greater than or equal to 0.5 mm.

[0040] In one embodiment of the present application, an appearance surface is provided on a side of the cover plate away from the display panel, and the appearance surface includes a second plane arranged opposite to the first plane and a second curved surface arranged opposite to the first curved surface, and the second plane is parallel to the first plane;

[0041] The second curved surface is parallel to the first curved surface, and the thickness of the cover plate is equal at all locations;

[0042] Alternatively, the second curved surface is not parallel to the first curved surface, the cover plate has a first thickness in an area corresponding to the corner curved surface away from the side curved surface to which it is connected, and the cover plate has a second thickness in an area corresponding to the corner curved surface close to the side curved surface to which it is connected, and the first thickness is less than the second thickness.

[0043] In one embodiment of the present application, the average curvature radius of the second curved surface is greater than or equal to the average curvature radius of the first curved surface.

[0044] In one embodiment of the present application, one end of the first curved surface away from the first plane extends along a first direction, and the angle between the first direction and the second direction is less than or equal to 90°, the second direction is a direction along the first plane pointing to the first curved surface, and the second direction is parallel to the first plane.

[0045] Specifically, please continue to refer to Figures 1, 2 and 3. The display module includes a stacked display panel 10 and a cover plate 20, and the cover plate 20 is arranged on the light-emitting side of the display panel 10, wherein the four edges of the cover plate 20 are bent toward one side of the display panel 10 to form a four-curved cover plate, and the flat part and the curved part of the display panel 10 and the cover plate 20 are bonded to form a four-curved display module, which can achieve a narrow-border display effect.

[0046] In one embodiment, the display panel 10 may include a panel body, a polarizer attached between the panel body and the cover plate 20, a back plate arranged on the side of the panel body away from the cover plate 20, and a heat dissipation buffer composite layer (Super Clean Foam, SCF) arranged on the side of the back plate away from the panel body.

[0047] Furthermore, a fitting surface 30 is provided on the side of the cover plate 20 close to the display panel 10, and an appearance surface 40 is provided on the side of the cover plate 20 away from the display panel 10; in one embodiment, the edges of the fitting surface 30 and the appearance surface 40 are both bent toward the side close to the display panel 10.

[0048] Among them, the bonding surface 30 includes a first plane 31 and a first curved surface 32 connected to the circumference of the first plane 31, and the display panel 10 is bonded to the first plane 31 and at least part of the first curved surface 32, and the position where the display panel 10 is bonded to the first curved surface 32 forms a curved display part.

[0049] In the embodiment of the present application, the curvature radius of the first curved surface 32 is designed differently to improve the phenomenon that wrinkles are easily generated during the bonding process between the display panel 10 and the cover plate 20 .

[0050] Specifically, the first curved surface 32 includes multiple side curved surfaces 321 and a corner curved surface 322 connected between two adjacent side curved surfaces 321; in one embodiment, the first plane 31 can be a polygon, such as a rectangle, and the side curved surface 321 is connected to the side of the first plane 31, and the corner curved surface 322 is connected to the corner between the two sides of the first plane 31, so that the corner curved surface 322 is located between two adjacent side curved surfaces 321.

[0051] In the embodiment of the present application, the display panel 10 is bonded to the bonding arc area 201 and the first plane 31. Within the bonding arc area 201, the average curvature radius of the corner curved surface 322 is greater than the average curvature radius of the side curved surface 321. Since the display panel 10 is more likely to generate wrinkles at the corner position during the bonding process, the average curvature radius of the corner curved surface 322 will be increased in the embodiment of the present application so that when the display panel 10 is bonded at the corner curved surface 322, the compression amount can be reduced, thereby reducing the probability of wrinkles on the display panel 10 at the corner curved surface 322.

[0052] Furthermore, in the embodiment of the present application, within the bonding arc area 201, the average curvature radius of the corner curved surface 322 in the area away from the side curved surface 321 to which it is connected is greater than the average curvature radius of the corner curved surface 322 in the area close to the side curved surface 321 to which it is connected, so that the average curvature radius is larger the closer to the center position of the corner curved surface 322, and thus the display panel 10 is compressed less during the bonding process when it is closer to the center position of the corner curved surface 322, which can effectively reduce the probability of wrinkles on the display panel 10 at the corners, thereby improving the bonding yield of the display panel 10.

[0053] Further, in one embodiment, please continue to combine Figures 1, 2 and 4, the corner surface 322 includes multiple sub-portions 320, one end of the sub-portion 320 is connected to the first plane 31, and the other end of the sub-portion 320 extends in a direction away from the first plane 31; wherein, the multiple sub-portions 320 include a central sub-portion 3224, one end of the central sub-portion 3224 is connected to the first plane 31, and the other end of the central sub-portion 3224 extends in a direction away from the first plane 31, and the extension direction of the central sub-portion 3224 has a preset angle with the boundary line between the corner surface 322 and the side surface 321. Within the fitting arc area 201, the average curvature radius of the central sub-portion 3224 is greater than the average curvature radius of other sub-portions 320 in the corner surface 322.

[0054] In one embodiment, the preset angle includes 45°, and the angle between the two intersection lines between the same corner surface 322 and the side surfaces 321 on both sides can be 90°, and the average curvature radius of the corner surface 322 is the largest at the angle of 45° between its extension direction and the intersection line between the corner surface 322 and the side surface 321.

[0055] In other embodiments of the present application, the preset angle may also include any other angles except 0° and 360°, and the embodiment of the present application takes the preset angle of 45° as an example for explanation.

[0056] In one embodiment, within the fitting arc area 201, the curvature radius of each sub-portion 320 decreases as the distance between each sub-portion 320 and the central sub-portion 3224 increases; it can be understood that the distance between each sub-portion 320 and the central sub-portion 3224 in the corner curved surface 322 can be the central arc length of the corner fan-shaped area in the top view.

[0057] It should be noted that the average curvature radius of the corner surface 322 gradually increases from the edge of the corner toward the center of the corner, and the degree of increase can become larger and larger, that is, the rate of change of the average curvature radius can become larger and larger. This is because the closer to the center of the corner, the greater the compression of the display panel 10 during the bonding process. For example, a Gaussian surface needs to be bonded to form a Gaussian surface. In the embodiment of the present application, the rate of change of the average curvature radius of the corner surface 322 is increased, so that the closer the corner surface 322 is to the center of the corner, the faster its average curvature radius increases, so as to more effectively reduce the probability of wrinkles forming at the corner of the display panel 10.

[0058] Specifically, in one embodiment, please refer to Figures 1, 2 and 4. Within the fitting arc area 201, the multiple sub-sections 320 also include a first sub-section 3221, a second sub-section 3222 and a third sub-section 3223, wherein, in the same corner curved surface 322, the second sub-section 3222 is located between the first sub-section 3221 and the side curved surface 321, the third sub-section 3223 is located between the second sub-section 3222 and the side curved surface 321, the distance between the first sub-section 3221 and the central sub-section 3224 is smaller than the distance between the second sub-section 3222 and the central sub-section 3224, and the distance between the second sub-section 3222 and the central sub-section 3224 is smaller than the distance between the third sub-section 3223 and the central sub-section 3224.

[0059] Furthermore, the average curvature radius of the first sub-section 3221 is greater than the average curvature radius of the second sub-section 3222, the average curvature radius of the second sub-section 3222 is greater than the average curvature radius of the third sub-section 3223, and the difference between the average curvature radius of the first sub-section 3221 and the average curvature radius of the second sub-section 3222 is greater than the difference between the average curvature radius of the second sub-section 3222 and the average curvature radius of the third sub-section 3223. The second sub-section 3222 can be directly connected between the first sub-section 3221 and the third sub-section 3223. This means that in the corner curved surface 322, the closer to the center of the corner, the faster its average curvature radius increases, thereby more effectively reducing the probability of wrinkles forming at the corner of the display panel 10.

[0060] It should be noted that within the fitting arc area 201, the first sub-section 3221, the second sub-section 3222 and the third sub-section 3223 are only three sub-sections 320 connected in the corner surface 322, and the relationship between the average curvature radii of the multiple sub-sections 320 can be set with reference to the first sub-section 3221, the second sub-section 3222 and the third sub-section 3223.

[0061] Continuing from the above, in one embodiment, referring to FIG1, FIG2, and FIG6, within the fitting arc area 201, when the change curve of the average curvature radius of the corner curved surface 322 changes smoothly, the corner curved surface 322 includes a first position A, a second position B1 and B2, a third position C1 and C2, and a fourth position D1 and D2; wherein, between the fourth position D1 and the first position A, the average curvature radius of the corner curved surface 322 gradually increases, and the rate of change of the average curvature radius also gradually increases; between the first position A and the fourth position D2, the average curvature radius of the corner curved surface 322 gradually increases. The rate radius gradually decreases, and the rate of change of the average curvature radius also gradually decreases, and the average curvature radius of the fourth position D1 and D2 can be equal to the average curvature radius of the side curved surface 321; further, the angle between the third position C1 and the fourth position D1, the angle between the second position B1 and the third position C1, the angle between the first position A and the second position B1, the angle between the first position A and the second position B2, the angle between the second position B2 and the third position C2, and the angle between the third position C2 and the fourth position D2 can all be 15°.

[0062] The width of each sub-section 320 can be selected according to actual needs. In the embodiment of the present application, the length of each sub-section 320 in the direction of the arc length of the corner sector area in the top view can be made sufficiently small so that the change curve of the average curvature radius of the corner curved surface 322 changes smoothly, as shown in Figure 5, wherein the ordinate represents the average curvature radius within the corner curved surface 322, and the abscissa represents different positions within the corner curved surface 322. Please refer to Figures 4 and 5. The 0° position in the abscissa can be the fourth position D1, and the α in the abscissa is the angle α between other positions within the corner curved surface 322 and the fourth position D1. For example, 15° can be the third position C1, 30° can be the second position B1, 45° can be the first position A, etc., 60° can be the second position B2, 75° can be the third position C2, and 90° can be the fourth position D2. Furthermore, the peak of the curve corresponds to the curvature radius of the corner surface 322 at the center of the corner, and the troughs on both sides of the curve correspond to the curvature radius of the corner surface 322 near the edge of the side surface 321, thereby improving the fitting effect between the display panel 10 and the cover plate 20, as well as the display effect of the display module; it can be seen that the slope of the curve in Figure 5 gradually increases in the direction close to the center of the corner, that is, the rate of change of the average curvature radius gradually increases in the direction close to the center of the corner, so as to further reduce the compression amount of the display panel 10 near the center of the corner, and improve the probability of wrinkles generated during the fitting process of the display panel 10.

[0063] In summary, in the embodiment of the present application, the average curvature radius of the corner curved surface 322 is increased to reduce the probability of wrinkles at the corners of the display panel 10 during the bonding process. At the same time, the average curvature radius of the corner curved surface 322 is set to gradually increase from the edge of the corner toward the center of the corner to further reduce the compression of the display panel 10 at the corner, and the compression of the display panel 10 gradually changes from the side curved surface 321 to the corner curved surface 322, and from the edge of the corner curved surface 322 to the center of the corner curved surface 322, and gradually increases. Therefore, on the basis of reducing the probability of the display panel 10 generating bonding wrinkles, poor bonding and optical anomalies caused by sudden changes in the cover plate morphology during bonding of the display panel 10 are avoided, thereby improving the yield rate and display effect of the display module.

[0064] Furthermore, since the embodiment of the present application increases the average curvature radius of the corner curved surface 322 within the bonding arc area 201, the probability of wrinkles on the display panel 10 during the bonding process can be reduced. However, the increase in the average curvature radius of the corner curved surface 322 will cause the edge size of the cover plate 20 to increase, and thus cause the border width of the display module to increase, which will be detrimental to the four-curved display module to achieve a narrow border. Therefore, the embodiment of the present application also designs the first curved surface 32 into a segmented arc.

[0065] Specifically, please combine Figures 1 and 2, the first curved surface 32 also includes at least one non-bonding arc area 202 located on the side of the bonding arc area 201 away from the first plane 31, wherein the average curvature radius R1 of the first curved surface 32 in the bonding arc area 201 is greater than the average curvature radius R2 of the first curved surface 32 in the non-bonding arc area 202.

[0066] In one embodiment of the present application, the appearance surface 40 includes a second plane 41 arranged opposite to the first plane 31, and a second curved surface 42 arranged opposite to the first curved surface 32, and one end of the second curved surface 42 is connected to the second plane 41, and the other end of the second curved surface 42 is bent in a direction close to the display panel 10; wherein, the second plane 41 is parallel to the first plane 31, and the second curved surface 42 is parallel to the first curved surface 32, and thus the average curvature radius of the second curved surface 42 is equal to the average curvature radius of the first curved surface 32, and the thickness of the cover plate 20 corresponding to the first curved surface 32 is uniform, and the thickness of the cover plate 20 is equal at all locations.

[0067] It can be understood that since the curvature radius of the cover plate 20 in the fitting arc area 201 is greater than the curvature radius of the cover plate 20 in the non-fitting arc area 202, and the curvature radius of the second curved surface 42 is equal to the curvature radius of the first curved surface 32, the second curved surface 42 will bulge away from the display panel 10 at the larger curvature radius relative to the smaller curvature radius. For example, the second curved surface 42 will bulge away from the display panel 10 in the area where the corresponding corner curved surface 322 is away from the side curved surface 321 to which it is connected, relative to the area where the corresponding corner curved surface 322 is close to the side curved surface 321 to which it is connected.

[0068] Furthermore, the display panel 10 is bonded to the first plane 31 and the bonding arc area 201, that is, the display panel 10 is bonded to the portion of the first curved surface 32 with a larger average curvature radius, and the average curvature radius of the non-bonding arc area 202 is reduced relative to the bonding arc area 201, that is, the average curvature radius of the second curved surface 42 away from the second plane 41 is also reduced, thereby reducing the edge size of the cover plate 20 and the frame width of the display module, which is beneficial for the four-curved display module to achieve a narrow frame.

[0069] In which, the edge of the display panel 10 does not exceed the boundary between the bonding arc area 201 and the non-bonding arc area 202, and the arc length distance from the edge of the display panel 10 to the boundary between the bonding arc area 201 and the non-bonding arc area 202 is greater than or equal to 0.25 mm.

[0070] It can be understood that the number of non-bonding arc areas 202 can be multiple, and the multiple non-bonding arc areas 202 are arranged along the direction of the first plane 31 close to the bonding arc area 201, and between two adjacent non-bonding arc areas 202, the average curvature radius of the first curved surface 32 in a non-bonding arc area 202 close to the bonding arc area 201 is greater than the average curvature radius of the first curved surface 32 in a non-bonding arc area 202 away from the bonding arc area 201, that is, the curvature of the multiple bonding arc areas 202 gradually decreases along the direction of the bonding arc area 201 close to the non-bonding arc area 202, thereby allowing the edge of the cover plate 20 to deviate toward the vertical direction as quickly as possible, so as to reduce the edge size of the cover plate 20 and reduce the border width of the display module, which is beneficial for the four-curved display module to achieve a narrow border.

[0071] In one embodiment, when the size of each non-fitting area 202 in the direction away from the first plane 31 is small enough, the curvature radius of the first curved surface 32 in the multiple non-fitting arc areas 202 in the direction away from the first plane 31 gradually decreases.

[0072] Optionally, one end of the first curved surface 32 away from the first plane 31 extends along the first direction M, and the angle between the first direction M and the second direction N is less than or equal to 90°, the second direction N is a direction pointing to the first curved surface 32 along the first plane 31, and the second direction N is parallel to the first plane 31. When the angle between the first direction M and the second direction N is 90°, the edge of the cover plate 20 will no longer extend outward, and the edge of the cover plate 20 transitions from a curved surface to a vertical state, which can improve the grip feel of the display panel.

[0073] In one embodiment, the number of non-fitting arc areas 202 at the corner curved surface 322 is less than or equal to the number of non-fitting arc areas 202 at the side curved surface 321, thereby enabling the average curvature radius at the side curved surface 321 to decrease more quickly, thereby more effectively reducing the border width of the display module at each side, thereby realizing a narrow-border display module.

[0074] Furthermore, the number of non-fitting arc areas 322 at the corner curved surface 322 away from the side curved surface 321 to which it is connected is smaller than the number of non-fitting arc areas 321 at the corner curved surface 322 close to the side curved surface 321 to which it is connected, thereby allowing the border width of the display module to gradually change from the corner to the side, thereby avoiding uneven stress and poor appearance caused by sudden changes in the border width.

[0075] It should be noted that in the embodiment of the present application, within the bonding arc region 201, the radius of curvature of the first curved surface 32 remains constant in a direction away from the first plane 31, that is, the radius of curvature of the first curved surface 32 in the bonding arc region 201 is uniform in a direction away from the first plane 31, thereby effectively improving the bonding yield of the display panel 10 within the bonding arc region 201. Alternatively, within the bonding arc region 201, the radius of curvature of the first curved surface 32 away from the first plane 31 is smaller than the radius of curvature of the first curved surface 32 near the first plane 31, and the radius of curvature of the first curved surface 32 within the bonding arc region 201 gradually decreases in a direction away from the first plane 31. In the direction away from the first plane 31 along the bonding arc region 201, the rate of change of the radius of curvature of the first curved surface 32 within the bonding arc region 201 is smaller than the rate of change of the radius of curvature of the first curved surface 32 in the two adjacent non-bonding arc regions 202.

[0076] Furthermore, when the curvature radii of the corner curved surface 322 in the fitting arc area 201 are equal, the average curvature radius of the corner curved surface 322 in the fitting arc area 201 can refer to the curvature radius of the corner curved surface 322 at any point in the fitting arc area 201; when the curvature radii of the corner curved surface 322 in the fitting arc area 201 are uneven, the average curvature radius of the corner curved surface 322 in the fitting arc area 201 can be the average value of the curvature radii of the corner curved surface 322 in the fitting arc area 201.

[0077] It can be understood that the average curvature radius defined in the non-fitting arc area 202 and the second curved surface 42 is the same as the average curvature radius defined in the fitting arc area 201, and will not be repeated here.

[0078] Continuing from the above, the embodiment of the present application increases the average curvature radius of the first curved surface 32 that is bonded to the display panel 10, thereby reducing the compression of the display panel 10 at the first curved surface 32. At the same time, the average curvature radius of the corner curved surface 322 is set to be larger than the average curvature radius of the side curved surface 321, and the average curvature radius of the corner curved surface 322 is set to gradually increase from the corner edge to the corner center, so as to further reduce the compression of the display panel 10 at the corner curved surface 322, reduce the probability of the display panel 10 generating bonding wrinkles at the first curved surface 32, especially the corner curved surface 322, and improve the yield rate of the display panel; at the same time, the embodiment of the present application sets a bonding arc area 201 with a larger average curvature radius and a non-bonding arc area 202 with a smaller average curvature radius in the first curved surface 32, thereby improving the bonding wrinkle phenomenon of the display module while reducing the border width of the display module to achieve a narrow-border display module.

[0079] Furthermore, in another embodiment of the present application, the second plane 41 is parallel to the first plane 31, and the second curved surface 42 is not parallel to the first curved surface 32, and the average curvature radius of the second curved surface 42 is greater than or equal to the average curvature radius of the first curved surface 32. Specifically, the average curvature radius of the second curved surface 42 can be equal to the average curvature radius of the first curved surface 32 in the fitting arc area 201, and the average curvature radius of the second curved surface 42 can be greater than the average curvature radius of the first curved surface 32 in the non-fitting arc area 202, and the curvature radius of the second curved surface 42 is uniform.

[0080] It should be noted that, in this embodiment, the area of ​​the cover plate 20 corresponding to the corner curved surface 322 away from the side curved surface 321 to which it is connected has a first thickness, and the area of ​​the cover plate 20 corresponding to the corner curved surface 322 close to the side curved surface 321 to which it is connected has a second thickness, and the first thickness is less than the second thickness; further, the thickness of the cover plate 20 in the non-bonding arc area 202 is greater than the thickness of the cover plate 20 in other areas; that is, the smaller the curvature radius corresponding to the first curved surface 32, the greater the thickness of the cover plate 20, and the part of the cover plate 20 with increased thickness in the non-bonding arc area 202 is located on the side of the cover plate 20 close to the display panel 10, so that the second curved surface 42 of the cover plate 20 can maintain a uniform curvature, which is beneficial to improving the appearance and gripping effect of the display panel.

[0081] In addition, since the curvature radius of the second curved surface 42 remains consistent, and the curvature radius of the first curved surface 32 in the non-fitting arc area 202 becomes smaller, the thickness of the cover plate 20 in the non-fitting arc area 202 can be increased, thereby improving the protection effect of the cover plate 20 on the side of the display module.

[0082] In one embodiment, the radius of curvature of the first curved surface 32 in the fitting arc area 201 is greater than or equal to 1.5 mm, and the radius of curvature of the first curved surface 32 in the non-fitting arc area 202 is greater than or equal to 0.5 mm.

[0083] Furthermore, the radius of curvature of the first curved surface 32 in the fitting arc area 201 is greater than or equal to 3 mm and less than or equal to 5 mm, and the radius of curvature of the first curved surface 32 in the non-fitting arc area 202 is greater than or equal to 1 mm; please combine Figures 1 and 6, the radius of curvature of the corner curved surface 322 in the fitting arc area 201 at the first position A is greater than or equal to 3.3 mm.

[0084] In addition, an embodiment of the present application further provides a display device, which includes the display module described in the above embodiment.

[0085] In one embodiment, the display device may include a mobile phone, a television, a computer, a tablet, and other large-screen display devices.

[0086] To sum up, in the embodiment of the present application, the average curvature radius of the corner curved surface 322 is increased to reduce the probability of wrinkles at the corners of the display panel 10 during the bonding process. At the same time, the average curvature radius of the corner curved surface 322 in the bonding arc area 201 is set to gradually increase from the edge of the corner toward the center of the corner to further reduce the compression of the display panel 10 at the corner, and the compression of the display panel 10 gradually changes from the side curved surface 321 to the corner curved surface 322, and from the edge of the corner curved surface 322 to the center of the corner curved surface 322, and gradually increases. Therefore, on the basis of reducing the probability of bonding wrinkles on the display panel 10, poor bonding and optical anomalies caused by sudden changes in the cover plate morphology during bonding of the display panel 10 are avoided, thereby improving the yield rate and display effect of the display module.

[0087] In the above embodiments, the description of each embodiment has its own focus. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0088] The above is a detailed introduction to a display module and a display device provided in the embodiments of the present application. Specific examples are used herein to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the technical solutions and core ideas of the present application. Ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. These modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A display module, comprising: A display panel; A cover plate disposed on one side of the display panel. A bonding surface is provided on the side of the cover plate close to the display panel. The bonding surface includes a first plane and a first curved surface connected to the periphery of the first plane. The display panel is bonded to the first plane and at least a part of the first curved surface; Wherein, one end of the first curved surface is connected to the first plane, and the other end of the first curved surface bends towards the side close to the display panel. The first curved surface includes a plurality of side curved surfaces and corner curved surfaces connected between adjacent two of the side curved surfaces. A bonding arc region is provided on the side of the first curved surface close to the first plane; within the bonding arc region, the average curvature radius in the region where the corner curved surface is far from the side curved surface it is connected to is greater than the average curvature radius in the region where the corner curved surface is close to the side curved surface it is connected to.

2. The display module according to claim 1, wherein, Within the bonding arc region, the corner curved surface includes a plurality of sub-parts. One end of each sub-part is connected to the first plane, and the other end of each sub-part extends in a direction away from the first plane; Wherein, the plurality of sub-parts include a central sub-part. The extending direction of the central sub-part has a preset included angle with the intersection line between the corner curved surface and the side curved surface. The preset included angle includes 45°. Within the bonding arc region, the average curvature radius of the central sub-part is greater than the average curvature radius of the other sub-parts in the corner curved surface.

3. The display module according to claim 2, wherein, Within the bonding arc region, the average curvature radius of each sub-part decreases as the distance between each sub-part and the central sub-part increases.

4. The display module according to claim 2, wherein, Within the bonding arc region, the plurality of sub-parts further include a first sub-part, a second sub-part located between the first sub-part and the side curved surface, and a third sub-part located between the second sub-part and the side curved surface. In the same corner curved surface, the distance between the first sub-part and the central sub-part is less than the distance between the second sub-part and the central sub-part, and the distance between the second sub-part and the central sub-part is less than the distance between the third sub-part and the central sub-part; Wherein, the average curvature radius of the first sub-part is greater than the average curvature radius of the second sub-part, the average curvature radius of the second sub-part is greater than the average curvature radius of the third sub-part, and the difference between the average curvature radius of the first sub-part and the average curvature radius of the second sub-part is greater than the difference between the average curvature radius of the second sub-part and the average curvature radius of the third sub-part.

5. The display module according to claim 4, wherein, The second sub-part is directly connected between the first sub-part and the third sub-part.

6. The display module according to claim 1, wherein, Within the bonding arc region, the average curvature radius of the corner curved surface is greater than the average curvature radius of the side curved surface.

7. The display module according to claim 1, wherein, Within the bonding arc region, the curvature radius of the first curved surface in the direction away from the first plane remains unchanged; Or, within the bonding arc region, the curvature radius of the first curved surface on the side away from the first plane is less than the curvature radius of the first curved surface on the side close to the first plane.

8. The display module according to claim 7, wherein, The first curved surface further includes at least one non - conforming arc region located on a side of the conforming arc region away from the first plane, and an average radius of curvature of the first curved surface within the conforming arc region is greater than an average radius of curvature of the first curved surface within the non - conforming arc region; Wherein, the display panel is in conformity with the first plane and the first curved surface within the conforming arc region, and an edge of the display panel does not extend beyond a boundary line between the conforming arc region and the non - conforming arc region.

9. The display module according to claim 8, wherein, The first curved surface includes a plurality of the non - conforming arc regions provided on a side of the conforming arc region away from the first plane. Between two adjacent non - conforming arc regions, an average radius of curvature of the first curved surface within a non - conforming arc region closer to the conforming arc region is greater than an average radius of curvature of the first curved surface within a non - conforming arc region farther from the conforming arc region.

10. The display module according to claim 9, wherein, A number of the non - conforming arc regions at the corner curved surface is less than or equal to a number of the non - conforming arc regions at the side curved surface.

11. The display module according to claim 9, wherein, A number of the non - conforming arc regions at the corner curved surface away from the side curved surface it is connected to is less than a number of the non - conforming arc regions at the corner curved surface closer to the side curved surface it is connected to.

12. The display module according to claim 9, wherein, In a direction away from the first plane along the conforming arc region, a rate of change of the radius of curvature of the first curved surface within the conforming arc region is less than a rate of change of the radius of curvature of the first curved surface within two adjacent non - conforming arc regions.

13. The display module according to claim 8, wherein, The radius of curvature of the first curved surface within the conforming arc region is greater than or equal to 1.5 mm, and the radius of curvature of the first curved surface within the non - conforming arc region is greater than or equal to 0.5 mm.

14. The display module according to claim 1, wherein, An appearance surface is provided on a side of the cover plate away from the display panel, and the appearance surface includes a second plane disposed opposite to the first plane and a second curved surface disposed opposite to the first curved surface, and the second plane is parallel to the first plane; The second curved surface is parallel to the first curved surface, and a thickness of each part of the cover plate is equal; Or, the second curved surface is not parallel to the first curved surface. The cover plate has a first thickness in a region corresponding to the corner curved surface away from the side curved surface it is connected to, and the cover plate has a second thickness in a region corresponding to the corner curved surface closer to the side curved surface it is connected to, and the first thickness is less than the second thickness.

15. The display module according to claim 14, wherein, An average radius of curvature of the second curved surface is greater than or equal to an average radius of curvature of the first curved surface.

16. The display module according to claim 1, wherein, One end of the first curved surface away from the first plane extends along a first direction, and an angle between the first direction and a second direction is less than or equal to 90°, where the second direction is a direction pointing from the first plane to the first curved surface and is parallel to the first plane.

17. A display device, the display device includes a display module, and the display module includes: A display panel; A cover plate disposed on one side of the display panel. A conforming surface is provided on a side of the cover plate close to the display panel, and the conforming surface includes a first plane and a first curved surface connected to a periphery of the first plane. The display panel is in conformity with the first plane and at least part of the first curved surface; Wherein, one end of the first curved surface is connected to the first plane, and the other end of the first curved surface is bent toward the side close to the display panel. The first curved surface includes a plurality of side curved surfaces and corner curved surfaces connecting between two adjacent side curved surfaces. A fitting arc region is provided on the side of the first curved surface close to the first plane. In the fitting arc region, the average curvature radius in the region where the corner curved surface is far from the side curved surface it is connected to is greater than the average curvature radius in the region where the corner curved surface is close to the side curved surface it is connected to.

18. The display device according to claim 17, wherein, In the fitting arc region, the curvature radius of the first curved surface in the direction away from the first plane remains unchanged; Alternatively, in the fitting arc region, the curvature radius of the side of the first curved surface away from the first plane is smaller than the curvature radius of the side of the first curved surface close to the first plane.

19. The display device according to claim 18, wherein, The first curved surface further includes at least one non-fitting arc region on the side of the fitting arc region away from the first plane, and the average curvature radius of the first curved surface in the fitting arc region is greater than the average curvature radius of the first curved surface in the non-fitting arc region; Wherein, the display panel is in contact with the first plane and the first curved surface in the fitting arc region, and the edge of the display panel does not extend beyond the boundary line between the fitting arc region and the non-fitting arc region.

20. The display device according to claim 19, wherein, The first curved surface includes a plurality of non-fitting arc regions provided on the side of the fitting arc region away from the first plane. Between two adjacent non-fitting arc regions, the average curvature radius of the first curved surface in one non-fitting arc region close to the fitting arc region is greater than the average curvature radius of the first curved surface in one non-fitting arc region away from the fitting arc region.

Images