CN116206535A - Display module and preparation method thereof - Google Patents

Abstract

The application provides a display module and a preparation method of the display module, wherein the display module is provided with a bending area and comprises a support layer, a screen body and a protection layer which are arranged in a laminated mode, the support layer is positioned on the backlight side of the screen body, and the protection layer is positioned on the light emitting side of the screen body; the supporting layer in the bending area is provided with a groove, the notch of the groove deviates from the protective layer, and the groove is internally provided with a thermal expansion film layer. The support layer on the backlight side of the screen body is provided with the groove, and the thermal expansion film layer is arranged in the groove, so that the screen body can be protected by the thermal expansion film layer, and the normal use of the screen body can be ensured in the bending or curling process; meanwhile, due to the protection effect of the thermal expansion film layer, the thickness of the protective layer positioned on the light emitting side of the screen body can be reduced, and the thermal expansion film layer is positioned in the groove formed in the supporting layer, so that the overall thickness of the display module is not increased, the thickness of the display module can be reduced, the screen occupation ratio of the display device applied by the display module is improved, and the width of the frame is reduced.

Description

Display module and preparation method thereof

Technical Field

The application relates to the technical field of display, in particular to a display module and a preparation method of the display module.

Background

With the development of flexible display technology, flexible display has become an important part in the field of display electronics. At present, the folding or curling terminal is mainly considered to be used in the fields of mobile phones, notebooks, tablet computers, vehicle-mounted and the like, can be conveniently stored or portable, and the folding or curling flexible display screen is attracting more and more attention.

In the related art, in order to protect the display screen from damage during bending or curling, a curved protective layer is generally designed on the screen body. The thickness of the curved protective layer is generally large in order to secure the protective effect.

However, the thicker curved protective layer increases the thickness of the display screen, increases the frame width of the display screen, and decreases the screen duty ratio of the display screen.

Disclosure of Invention

In order to solve at least one problem mentioned in the background art, the application provides a display module and a preparation method of the display module, and aims to solve the technical problems that in the related art, a thicker bending protection layer can increase the thickness of a display screen, increase the frame width of the display screen and reduce the screen occupation ratio of the display screen.

In order to achieve the above object, in a first aspect, the present application provides a display module having a bending region, where the display module includes a support layer, a screen body, and a protection layer that are stacked, the support layer is located on a backlight side of the screen body, and the protection layer is located on a light emitting side of the screen body;

the support layer in the bending area is provided with a groove, the notch of the groove deviates from the protective layer, and the groove is internally provided with a thermal expansion film layer.

The application provides a display module, wherein the thermal expansion film layer can protect the screen body, and can ensure the normal use of the screen body in the bending or curling process; meanwhile, due to the protection effect of the thermal expansion film layer, the thickness of the protective layer positioned on the light emitting side of the screen body can be reduced, and the thermal expansion film layer is positioned in the groove formed in the supporting layer, so that the overall thickness of the display module is not increased, the thickness of the display module can be reduced, the screen occupation ratio of the display device applied by the display module is improved, and the width of the frame is reduced.

In the above display module, optionally, the groove is a blind groove, the thermal expansion film layer is connected with a bottom of the groove, and the thermal expansion film layer is abutted with a side wall of the groove;

preferably, the preparation material of the thermal expansion film layer is polyethylene or polyethylene terephthalate or thermoplastic polyurethane elastomer;

preferably, the Young's modulus of the thermal expansion film layer is in the range of 2 x 10 ⁹ -3*10 ⁹ Pa。

Therefore, the thermal expansion film layer can be prevented from being in direct contact with the screen body, and the structure of the screen body is prevented from being damaged; the effect of the supporting layer on supporting the screen body can be improved; the normal operation of the screen body can be ensured; stress concentration in the screen body can be reduced, and the screen body is prevented from being damaged.

In the above display module, optionally, the display module further includes an adhesive layer located between the supporting layer and the thermal expansion film layer, where the thermal expansion film layer is connected to the supporting layer through the adhesive layer.

Therefore, the thermal expansion film layer and the supporting layer can form a whole, and the supporting layer can be used for supporting the screen body.

In the above display module, optionally, the bonding layer is provided with a plurality of spheres, and the spheres are uniformly distributed in the bonding layer at intervals;

preferably, the material of the sphere includes at least one of rubber and silica gel.

Therefore, glue overflow of the bonding layer is avoided, and normal operation of the display module can be ensured.

In the above display module, optionally, the screen body includes a bending portion located in the bending region, and orthographic projection of the bending portion on the supporting layer at least covers the groove.

Like this, can provide better supporting effect for the kink, separate screen body and adhesive linkage simultaneously, avoid the adhesive linkage direct to contact with the kink, cause the influence to kink and screen body, can guarantee the normal work of screen body.

In the above display module, optionally, at least the bending portion is covered by orthographic projection of the protective layer on the screen body;

preferably, the distance between the edge of the protective layer and the edge of the corresponding bending part is in the range of 0.2-0.4mm.

Therefore, the bending part can be protected, the bending part is prevented from being damaged in the bending or curling process, and the normal operation of the screen body is ensured.

In the above display module, optionally, in a thickness direction of the display module, a thickness of the thermal expansion film layer is a first dimension, a sum of a thickness of the protective layer, a thickness of the screen body, and a thickness of the support layer where the groove is not provided is a second dimension, and a ratio of the first dimension to the second dimension ranges from 1/4 or more to 1/2 or less;

preferably, the ratio of the first dimension to the second dimension ranges from greater than or equal to 1/4 to less than or equal to 1/3.

Thus, the supporting performance of the thermal expansion film layer can be ensured, and the bending performance of the thermal expansion film layer can be ensured.

In the above display module, optionally, in a thickness direction of the display module, a sum of a thickness of the adhesive layer and a thickness of the thermal expansion film layer is greater than or equal to a depth of the groove;

and/or, in the thickness direction of the display module, the ratio of the depth of the groove to the thickness of the supporting layer without the groove is greater than or equal to 1/2 and less than or equal to 3/4.

Thus, the connection strength between the thermal expansion film layer and the supporting performance can be ensured.

In a second aspect, the present application further provides a method for manufacturing a display module, where the display module has a bending region, and the method includes:

providing a support layer, a screen body and a protective layer which are arranged in a stacked manner, wherein the support layer is positioned on the backlight side of the screen body, the protective layer is positioned on the light emitting side of the screen body, a groove is formed in the support layer positioned in the bending region, and the notch of the groove is away from the protective layer;

a thermal expansion film filling piece is arranged in the groove;

and heating the display module, bending the display module along the bending area, and heating and expanding the thermal expansion film filling piece to form a thermal expansion film layer.

The application provides a preparation method of a display module, which can prepare the display module with a thermal expansion film layer, wherein the thermal expansion film layer can protect a screen body, and can ensure the normal use of the screen body in the bending or curling process; meanwhile, due to the protection effect of the thermal expansion film layer, the thickness of the protective layer positioned on the light emitting side of the screen body can be reduced, and the thermal expansion film layer is positioned in the groove formed in the supporting layer, so that the overall thickness of the display module is not increased, the thickness of the display module can be reduced, the screen occupation ratio of the display device applied by the display module is improved, and the width of the frame is reduced.

In the above method for manufacturing a display module, optionally, a space is provided between the side wall of the thermal expansion film filling member and the groove side wall of the groove, and the space is in a range of 0.1-0.3mm.

Therefore, the thermal expansion film layer formed after the thermal expansion of the thermal expansion film filling piece can be abutted against the supporting layer, so that the supporting performance of the supporting layer is guaranteed.

The display module is provided with a bending area, and comprises a support layer, a screen body and a protection layer which are arranged in a stacked mode, wherein the support layer is positioned on the backlight side of the screen body, and the protection layer is positioned on the light emitting side of the screen body; the supporting layer in the bending area is provided with a groove, the notch of the groove deviates from the protective layer, and the groove is internally provided with a thermal expansion film layer. By arranging the thermal expansion film layer, the thermal expansion film layer can protect the screen body, and the normal use of the screen body can be ensured in the bending or curling process; meanwhile, due to the protection effect of the thermal expansion film layer, the thickness of the protective layer positioned on the light emitting side of the screen body can be reduced, and the thermal expansion film layer is positioned in the groove formed in the supporting layer, so that the overall thickness of the display module is not increased, the thickness of the display module can be reduced, the screen occupation ratio of the display device applied by the display module is improved, and the width of the frame is reduced.

The construction of the present application, as well as other application objects and advantages thereof, will be more readily understood from the description of the preferred embodiment taken in conjunction with the accompanying drawings.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are some embodiments of the present application, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic structural diagram of a display module provided in an embodiment of the present application;

FIG. 2 is an enlarged schematic view of the structure of FIG. 1 at A;

fig. 3 is a schematic structural diagram of a display module provided in an embodiment of the present application before a processing process;

fig. 4 is a schematic structural diagram of a display module according to an embodiment of the present disclosure during a processing process;

FIG. 5 is an enlarged schematic view of the structure at B in FIG. 3;

fig. 6 is a schematic flow chart of a method for manufacturing a display module according to an embodiment of the present application;

fig. 7 is a schematic flow chart of another method for manufacturing a display module according to an embodiment of the present disclosure;

fig. 8 is a schematic structural diagram of a display device according to an embodiment of the present application.

Reference numerals illustrate:

100-a display module;

101-a kink zone;

102-non-inflection region;

110-a support layer;

120-screen body;

130-a protective layer;

103-backlight side;

104-light-emitting side;

111-grooves;

140-a thermal expansion film layer;

150-an adhesive layer;

151-sphere;

121-a bending part;

s1-a first distance;

m1-a first dimension;

m2-a second dimension;

n3-a third dimension;

m4-fourth size;

m5-fifth size;

160-heightening the block;

170-a circuit board;

180-thermal expansion film filler;

200-heating the cavity;

300-jig;

400-display device.

Specific embodiments thereof have been shown by way of example in the drawings and will herein be described in more detail. These drawings and the written description are not intended to limit the scope of the inventive concepts in any way, but to illustrate the concepts of the present application to those skilled in the art by reference to specific embodiments.

Detailed Description

In the related art, the display module has a bending region that can be bent or curled. In order to enable the screen body in the bending region to work normally after bending or curling, a bending protective layer is usually arranged on the light-emitting side of the screen body in the bending region. Meanwhile, in order to ensure that the screen body cannot be broken or torn, the thickness of the bending protection layer is generally larger, so that the normal operation of the screen body is better ensured. However, because the thickness of the bending protection layer is larger, the whole thickness of the display module is larger, and the display equipment adopting the display module has smaller screen occupation and larger frame.

Based on the technical problems, the embodiment of the application provides a display module and a preparation method of the display module, wherein the display module is provided with a bending area and comprises a support layer, a screen body and a protection layer which are arranged in a stacked manner, the support layer is positioned on the backlight side of the screen body, and the protection layer is positioned on the light emitting side of the screen body; the supporting layer in the bending area is provided with a groove, the notch of the groove deviates from the protective layer, and the groove is internally provided with a thermal expansion film layer. The support layer on the backlight side of the screen body is provided with the groove, and the thermal expansion film layer is arranged in the groove, so that the screen body can be protected by the thermal expansion film layer, and the normal use of the screen body can be ensured in the bending or curling process; meanwhile, due to the protection effect of the thermal expansion film layer, the thickness of the protective layer positioned on the light emitting side of the screen body can be reduced, and the thermal expansion film layer is positioned in the groove formed in the supporting layer, so that the overall thickness of the display module is not increased, the thickness of the display module can be reduced, the screen occupation ratio of the display device applied by the display module is improved, and the width of the frame is reduced.

For the purpose of making the objects, technical solutions and advantages of the present application more apparent, the technical solutions in the embodiments of the present application will be described in more detail below with reference to the accompanying drawings in the preferred embodiments of the present application. In the drawings, the same or similar reference numerals refer to the same or similar components or components having the same or similar functions throughout. The described embodiments are some, but not all, of the embodiments of the present application. The embodiments described below by referring to the drawings are exemplary and intended for the purpose of explaining the present application and are not to be construed as limiting the present application. All other embodiments, which can be made by one of ordinary skill in the art based on the embodiments herein without making any inventive effort, are intended to be within the scope of the present application. Embodiments of the present application are described in detail below with reference to the accompanying drawings.

Fig. 1 is a schematic structural diagram of a display module provided in an embodiment of the present application; fig. 2 is an enlarged schematic view of the structure at a in fig. 1.

Referring to fig. 1 and fig. 2, in a first aspect, a display module 100 is provided, the display module 100 has a bending region 101, the display module 100 includes a support layer 110, a screen 120 and a protection layer 130 that are stacked, the support layer 110 is located on a backlight side 103 of the screen 120, and the protection layer 130 is located on a light emitting side 104 of the screen 120. The supporting layer 110 in the bending area 101 is provided with a groove 111, the notch of the groove 111 faces away from the protective layer 130, and the groove 111 is internally provided with a thermal expansion film layer 140.

Specifically, the supporting layer 110 is used for supporting the screen 120, so as to ensure structural stability of the screen 120; the protective layer 130 is used for protecting the screen 120, so as to prevent the screen 120 from being damaged in the bending or curling process; the display module 100 may have a bending region 101 and a non-bending region 102, and during bending or curling of the display module 100, only a portion of the display module 100 in the bending region 101 bends or curls, and a portion of the display module 100 in the non-bending region 102 remains unchanged.

It can be understood that the thermal expansion film layer 140 is formed after the display module 100 is processed, and before the processing is started, the thermal expansion film filling member located in the groove 111 is the thermal expansion film layer 140 before being unexpanded, that is, the thermal expansion film filling member has a thermal expansion property, and the thermal expansion film filling member is heated and expanded by raising the temperature, so as to form the thermal expansion film layer 140. The thermal expansion film layer 140 after processing is described below.

It should be noted that, in the display module 100, the positions of the bending region 101 and the non-bending region 102 may be arbitrary, and as an example, the bending region 101 may separate the non-bending region 102 to form a structure of the non-bending region 102-the bending region 101-the non-bending region 102; the inflection region 101 may also be located on one side of the non-inflection region 102 to form a structure of the non-inflection region 102-inflection region 101 or the inflection region 101-non-inflection region 102; the inflection region 101 may also be separated by a non-inflection region 102, forming an inflection region 101-non-inflection region 102-inflection region 101 structure. The specific structure of the inflection region 101 and the non-inflection region 102 in the embodiment of the present application is not limited, and is not limited to the above example.

Further, the positions of the bending region 101 and the non-bending region 102 start from only one direction of the plane of the display module 100, and in the display module 100, the non-bending regions 102 may be disposed on the peripheral sides of the bending region 101, which also belongs to the structures of the non-bending region 102, the bending region 101 and the non-bending region 102.

The following will describe an example of the structure of the non-inflection region 102-inflection region 101-non-inflection region 102 in one of the directions described above.

It is understood that the material of the supporting layer 110 may be SUS301 (301 stainless steel), SUS304 (304 stainless steel), SUS316L (316L stainless steel), amorphous alloy, copper-nickel-tin alloy, titanium alloy, magnesium alloy, polymer, carbon fiber, glass, etc. The material of the supporting layer 110 is not limited to the above example.

The screen 120 may be a flexible screen 120, and may be bent or curled. The screen body 120 may include a substrate, a flexible screen, and a touch layer sequentially stacked, where the substrate, the flexible screen, and the touch layer have a specific film thickness, a neutral layer of the display module 100 is disposed between the flexible screen and the touch layer, the substrate and the flexible screen are both stressed by pressure when the display module 100 is bent or curled, and the touch layer is stressed by tensile when the display module 100 is bent or curled, and the neutral layer is neither stressed by pressure nor by tensile. The direct reduction of the thickness of the protective layer 130 may cause the neutral layer to deviate from the touch layer, and receive a tensile stress when the display module 100 is bent or curled, which may easily cause the neutral layer to break. By providing the groove 111 in the supporting layer 110 and providing the thermal expansion film layer 140 in the groove 111, the position of the neutral layer is kept unchanged, so that the neutral layer is ensured not to be stressed by compression or tension, and further the neutral layer is prevented from being broken, and the normal operation of the display module 100 is ensured.

Further, the material of the protective layer 130 may be one or more of aluminum oxide, silicon nitride, and silicon oxynitride, and the material of the protective layer 130 is not limited in the embodiment of the present application, and is not limited in the above examples.

As an alternative embodiment, the groove 111 is a blind groove, the thermal expansion film 140 is connected with the bottom of the groove 111, and the thermal expansion film 140 abuts against the side wall of the groove 111.

It is understood that the thermal expansion film layer 140 located in the groove 111 can play a role of supporting the auxiliary supporting layer 110, so as to ensure the normal operation of the display module 100.

Further, the groove 111 is a blind groove, and the thermal expansion film 140 is located in the groove 111, that is, a part of the supporting layer 110 is further included between the thermal expansion film 140 and the screen 120, so that the thermal expansion film 140 and the screen 120 can be prevented from directly contacting to damage the structure of the screen 120. The thermal expansion film layer 140 is respectively abutted against the bottom of the groove 111 and the side wall of the groove 111, that is, the thermal expansion film layer 140 fills the groove 111 of the supporting layer 110, so that the thermal expansion film layer 140 and the supporting layer 110 form a whole, and the effect of the supporting layer 110 on supporting the screen 120 can be improved. The groove 111 has the lateral wall and the tank bottom that is connected with the lateral wall, and the thermal expansion membrane layer 140 is connected with the tank bottom of groove 111, and the lateral wall of butt recess 111 simultaneously to butt supporting layer 110 avoids having the gap between supporting layer 110 and the thermal expansion membrane layer 140, influences the connection compactness of thermal expansion membrane layer 140 and supporting layer 110, can guarantee the normal work of screen 120.

It can be appreciated that by setting the thermal expansion film layer 140, in the process of forming the thermal expansion film layer 140 by thermal expansion, the gap between the thermal expansion film layer 140 and the groove 111 can be filled, and then the connection tightness between the thermal expansion film layer 140 and the supporting layer 110 can be improved, and further the supporting effect of the supporting layer 110 on the screen 120 can be ensured, and the normal operation of the screen 120 can be ensured. In addition, the thermal expansion film layer 140 is made of an organic material, and is in contact with the groove 111 of the support layer 110, the support layer 110 supports the screen 120, in use of the screen 120, the screen can transfer stress to the support layer 110, and the support layer 110 transfers stress to the thermal expansion film layer 140, so that stress concentration in the screen 120 is reduced, and breakage of the screen 120 is avoided.

As an alternative embodiment, the material of the thermal expansion film layer 140 is Polyethylene (PE) or Polyethylene terephthalate (Polyethylene Terephthalate PET) or thermoplastic polyurethane elastomer (Thermoplastic Polyurethanes TPU).

It is understood that the materials for preparing the thermal expansion film 140 are only examples, and other materials are also possible.

As an alternative embodiment, the young's modulus of the thermal expansion layer 140 ranges from 2×10 ⁹ -3*10 ⁹ Pa。

It can be appreciated that the thermal expansion film layer 140 with the young's modulus in the above range has a certain tensile property, that is, the thermal expansion film layer 140 can be tightly attached to the supporting layer 110, so that a gap between the supporting layer 110 and the thermal expansion film layer 140 is avoided, the connection tightness between the thermal expansion film layer 140 and the supporting layer 110 is affected, and the normal operation of the screen 120 can be ensured.

As an alternative embodiment, the display module 100 further includes an adhesive layer 150 located between the supporting layer 110 and the thermal expansion film layer 140, where the thermal expansion film layer 140 is connected to the supporting layer 110 through the adhesive layer 150, so that the thermal expansion film layer 140 and the supporting layer 110 form an integral body, and the supporting layer 110 can support the screen 120.

Specifically, the adhesive layer 150 covers at least the thermal expansion film layer 140, so as to ensure that the side of the thermal expansion film layer 140 near the bottom of the groove 111 is connected to the supporting layer 110 through the adhesive layer 150.

It should be noted that, the adhesive layer 150 may be an optical adhesive (Optical Clear Adhesive, abbreviated as OCA) or may be other types of adhesive, and the specific type of the adhesive layer 150 is not limited in the embodiment of the present application, and is not limited to the above examples.

As an alternative embodiment, a plurality of spheres 151 are disposed in the adhesive layer 150, and the plurality of spheres 151 are uniformly spaced apart in the adhesive layer 150. Through setting up the spheroid 151 in adhesive linkage 150, the shape of adhesive linkage 150 can be fixed to the spheroid 151, avoids adhesive linkage 150 to take place to overflow to glue, and simultaneously, the surface of spheroid 151 is smooth curved surface, and the possibility that bumps into with supporting layer 110 contact is less, can guarantee the normal work of display module assembly 100.

It is to be understood that the number of the spheres 151 may be arbitrary, and exemplary, the number of the spheres 151 may be two, four, six, or ten, and the number of the spheres 151 is not limited in the embodiment of the present application, and may be correspondingly set according to the size of the adhesive layer 150.

As an alternative embodiment, the material of the sphere 151 includes at least one of rubber and silica gel.

It can be understood that the material of the sphere 151 may be rubber or silica gel, or a mixture of rubber and silica gel, that is, the sphere 151 has a smaller mass and a smoother surface, so that the mass of the display module 100 is not greatly increased, and meanwhile, the possibility of occurrence of the support layer 110 is avoided, and the normal operation of the display module 100 is ensured.

As an alternative embodiment, the screen 120 includes a bending portion 121 located in the bending region 101, and an orthographic projection of the bending portion 121 on the supporting layer 110 covers at least the groove 111.

Specifically, the bending portion 121 is a portion of the screen 120 where bending or curling may occur, and it is understood that a circular arc track may be formed during the bending or curling of the bending portion 121. Through covering recess 111 with the orthographic projection of kink 121 on supporting layer 110 at least, and because at buckling or the in-process of curling, kink 121 is kept away from the centre of a circle of convex orbit in recess 111, consequently make recess 111 can correspond kink 121, and then make supporting layer 110 set up the part of recess 111 correspond with kink 121, can provide better supporting effect for kink 121, separate screen 120 and adhesive linkage 150 simultaneously, avoid adhesive linkage 150 direct and kink 121 contact, cause the influence to kink 121 and screen 120, can guarantee the normal work of screen 120.

As an alternative embodiment, the front projection of the protective layer 130 on the screen 120 covers at least the bending portion 121.

Specifically, the front projection of the protective layer 130 on the screen 120 may cover the bending portion 121 completely, or may exceed the covering bending portion 121, so as to protect the bending portion 121, avoid the bending portion 121 from being damaged during bending or curling, and ensure the normal operation of the screen 120.

The following description will take an example in which the front projection of the protective layer 130 on the screen 120 exceeds the cover bending portion 121.

As an alternative embodiment, referring to fig. 1 and 2, the distance between the edge of the protective layer 130 and the edge of the corresponding bent portion 121 ranges from 0.2 to 0.4mm.

Specifically, the distance between the edge of the protective layer 130 and the edge of the corresponding bending portion 121 is a first distance S1, and the distance range of the first distance S1 is 0.2-0.4mm, so that the protective layer 130 can be realized to exceed the covering bending portion 121 to better protect the bending portion 121, meanwhile, the first distance S1 is smaller, other components located on the screen 120 are not affected, and further the normal operation of the screen 120 can be ensured.

As an alternative embodiment, referring to fig. 1 and 2, in the thickness direction of the display module 100, the thickness of the thermal expansion film layer 140 is a first dimension M1, the sum of the thickness of the protective layer 130, the thickness of the screen body 120, and the thickness of the support layer 110 without the grooves 111 is a second dimension M2, and the ratio of the first dimension M1 to the second dimension M2 is greater than or equal to 1/4 and less than or equal to 1/2.

Specifically, the thickness of the thermal expansion film layer 140 is the first dimension M1, the sum of the thickness of the protective layer 130, the thickness of the screen body 120, and the thickness of the support layer 110 without the grooves 111 is the second dimension M2, and the support performance of the thermal expansion film layer 140 can be ensured by setting the ratio of the first dimension M1 to the second dimension M2 to be greater than or equal to 1/4, that is, the first dimension M1 is at least 1/4 of the second dimension M2; by setting the ratio of the first dimension M1 to the second dimension M2 to be less than or equal to 1/2, i.e., the first dimension M1 is at most 1/2 of the second dimension M2, the bending property of the thermal expansion film layer 140 can be ensured. If the ratio of the first dimension M1 to the second dimension M2 is less than 1/4, the thickness of the thermal expansion film layer 140 is smaller, the supporting capability is weaker, and the screen 120 cannot be supported; if the ratio of the first dimension M1 to the second dimension M2 is greater than 1/2, the thickness of the thermal expansion film layer 140 is too large, and the difficulty of bending or curling the screen 120 is increased, so that the preset bending or curling cannot be completed.

The ratio of the first dimension M1 to the second dimension M2 may be 1/4, 1/3, 2/5, 3/7, 3/8, 7/16, 7/19, 9/27, etc., and the specific ratio between the first dimension M1 and the second dimension M2 is not limited, and the embodiment is not limited to the above examples.

As an alternative embodiment, the ratio of the first dimension M1 to the second dimension M2 ranges from greater than or equal to 1/4 and less than or equal to 1/3.

It can be appreciated that by setting the ratio range of the first dimension M1 to the second dimension M2 to be greater than or equal to 1/4 and less than or equal to 1/3, the bending performance of the thermal expansion film 140 can be ensured while the supporting performance of the thermal expansion film 140 is ensured.

The ratio of the first dimension M1 to the second dimension M2 may be 1/4, 1/3, 2/7, 3/11, 4/15, 7/25, 9/29, etc., and the specific ratio between the first dimension M1 and the second dimension M2 is not limited in the embodiment of the present application.

As an alternative embodiment, referring to fig. 1 and 2, the sum of the thickness of the adhesive layer 150 and the thickness of the thermal expansion layer 140 is greater than or equal to the depth of the groove 111 in the thickness direction of the display module 100.

Specifically, the sum of the thickness of the adhesive layer 150 and the thickness of the thermal expansion film layer 140 is a third dimension N3, the depth of the groove 111 is a fourth dimension M4, and the third dimension N3 may be greater than the fourth dimension M4 or equal to the fourth dimension M4, so as to ensure the connection strength and the supporting performance between the thermal expansion film layer 140 and the supporting layer 110. If the third dimension N3 is smaller than the fourth dimension M4, the thickness of the thermal expansion layer 140 is smaller, and the supporting capability is weaker; or the thickness of the adhesive layer 150 is smaller, the adhesive performance is weaker, and the connection strength between the thermal expansion film layer 140 and the supporting layer 110 cannot be ensured, so that the normal operation of the screen 120 is affected.

As an alternative embodiment, referring to fig. 1 and 2, the ratio of the depth of the groove 111 to the thickness of the supporting layer 110 where the groove 111 is not provided is in the range of 1/2 or more and 3/4 or less in the thickness direction of the display module 100.

Specifically, referring to the above, the depth of the groove 111 is the fourth dimension M4, and by setting the depth of the groove 111 and the thickness of the support layer 110 where the groove 111 is not provided to be the fifth dimension M5, the ratio range of the fourth dimension M4 to the fifth dimension M5 is set to be greater than or equal to 1/2 and less than or equal to 3/4, the support performance of the support layer 110 to the bent portion 121 can be ensured.

For example, if the ratio of the fourth dimension M4 to the fifth dimension M5 is greater than 3/4, that is, the distance between the bottom of the groove 111 and the screen 120 is smaller, the supporting layer 110 at the bottom of the groove 111 is easily broken during the bending or curling process of the display module 100, which affects the normal operation of the screen 120.

For another example, if the ratio of the fourth dimension M4 to the fifth dimension M5 is less than 1/2, that is, the distance between the bottom of the groove 111 and the screen 120 is larger, that is, the depth of the groove 111 is smaller, the space provided for the thermal expansion film 140 is smaller, which is not beneficial to reducing the screen ratio of the display device applied to the display module 100.

The display module 100 provided in this embodiment of the present application has a bending region 101, where the display module 100 includes a support layer 110, a screen body 120 and a protection layer 130 that are stacked, the support layer 110 is located on a backlight side 103 of the screen body 120, and the protection layer 130 is located on a light emitting side 104 of the screen body 120; the supporting layer 110 in the bending area 101 is provided with a groove 111, the notch of the groove 111 faces away from the protective layer 130, and the groove 111 is internally provided with a thermal expansion film layer 140. By providing the groove 111 on the support layer 110 on the backlight side 103 of the screen 120 and providing the thermal expansion film layer 140 in the groove 111, the thermal expansion film layer 140 can protect the screen 120, and can ensure the normal use of the screen 120 in the bending or curling process; meanwhile, due to the protection effect of the thermal expansion film layer 140, the thickness of the protective layer 130 on the light emitting side 104 of the screen body 120 can be reduced, and the thermal expansion film layer 140 is positioned in the groove 111 formed in the supporting layer 110, so that the overall thickness of the display module 100 is not increased, the thickness of the display module 100 can be reduced, the screen occupation ratio of the display device applied by the display module 100 is improved, and the width of the frame is reduced.

Fig. 3 is a schematic structural diagram of a display module provided in an embodiment of the present application before a processing process; fig. 4 is a schematic structural diagram of a display module according to an embodiment of the present disclosure during a processing process, and fig. 5 is an enlarged schematic structural diagram of a portion B in fig. 3; fig. 6 is a schematic flow chart of a method for manufacturing a display module according to an embodiment of the present application; fig. 7 is a schematic flow chart of another method for manufacturing a display module according to an embodiment of the present disclosure;

referring to fig. 3 to fig. 7, in a second aspect, the present application further provides a method for manufacturing a display module 100, where the display module 100 has a bending region 101, and the method includes:

s100: the support layer, the screen body and the protective layer that the range upon range of setting are provided, and the support layer is located the back light side of screen body, and the protective layer is located the play light side of screen body, is provided with the recess on the support layer that is located the district of buckling, and the notch of recess deviates from the protective layer.

Specifically, the display module 100 may further include a spacer 160 and a circuit board 170, where the spacer 160 is located on the backlight side 103 of the screen 120, and is connected to the support layer 110 without the groove 111 and is disposed near the groove 111; the circuit board 170 is located on the light emitting side 104 of the panel 120, electrically connected to the panel 120, and spaced apart from the protective layer 130.

S200: and a thermal expansion film filling piece is arranged in the groove.

It is understood that the thermal expansion membrane filling member 180 may form the thermal expansion membrane layer 140 as described above, and will not be described herein.

S300: and heating the display module and bending the display module along the bending area, wherein the thermal expansion film filling piece is heated and expanded to form a thermal expansion film layer.

Wherein, the display module 100 is bent along the bending region 101, and the thermal expansion film filling member 180 is heated and filled to form the thermal expansion film layer 140 in the above description, so as to protect the screen 120; during the bending or curling process, the normal use of the screen 120 can be ensured; meanwhile, due to the protection effect of the thermal expansion film layer 140, the thickness of the protective layer 130 on the light emitting side 104 of the screen body 120 can be reduced, and the thermal expansion film layer 140 is positioned in the groove 111 formed in the supporting layer 110, so that the overall thickness of the display module 100 is not increased, the thickness of the display module 100 can be reduced, the screen occupation ratio of the display device applied by the display module 100 is improved, and the width of the frame is reduced.

Further, the heating display module 100 includes:

s310: and providing a heating cavity, and arranging the display module in the heating cavity.

S320: the heating chamber is heated to a preset temperature.

Bending the display module 100 along the bending region 101 includes:

s330: providing a jig and controlling the jig to adsorb the circuit board of the screen body.

S340: and bending the display module along the bending area until the supporting layer on one side of the jig adsorption circuit board is connected with the supporting layer connected with the elevating block, and heating and expanding the thermal expansion film filling piece to form a thermal expansion film layer.

As an alternative embodiment, referring to fig. 3 and 5, the thermal expansion membrane filler 180 has a space between the sidewall and the groove sidewall of the groove 111 in the range of 0.1-0.3mm.

Specifically, the distance between the sidewall of the thermal expansion film filling member 180 and the groove sidewall of the groove 111 is a second distance S2, and the second distance is in the range of 0.1-0.3mm, so that the thermal expansion film layer 140 formed by the thermal expansion film filling member 180 after being heated and expanded can be ensured to abut against the supporting layer 110.

For example, if the second distance is smaller than 0.1mm, the distance between the thermal expansion film filling member 180 and the supporting layer 110 is too small, the thermal expansion film filling member 180 after thermal expansion will cause too large pressure on the supporting layer 110, so that the structure of the supporting layer 110 is easily damaged, the supporting performance of the supporting layer 110 is affected, and normal use of the screen 120 cannot be guaranteed.

For another example, if the second distance is greater than 0.3mm, the distance between the thermal expansion film filling member 180 and the supporting layer 110 is too large, and the thermal expansion film filling member 180 after being heated and expanded cannot abut against the supporting layer 110, i.e. the supporting performance of the thermal expansion film layer 140 is insufficient, so that the normal use of the screen 120 cannot be ensured.

According to the manufacturing method of the display module 100 provided by the embodiment of the application, the display module 100 with the thermal expansion film layer 140 can be formed by using the manufacturing method, the display module 100 comprises a support layer 110, a screen body 120 and a protection layer 130 which are stacked, the support layer 110 is positioned on the backlight side 103 of the screen body 120, and the protection layer 130 is positioned on the light emitting side 104 of the screen body 120; the groove 111 is located on the supporting layer 110 in the bending region 101, and the notch of the groove 111 faces away from the protective layer 130. By providing the groove 111 on the support layer 110 on the backlight side 103 of the screen 120 and providing the thermal expansion film layer 140 in the groove 111, the thermal expansion film layer 140 can protect the screen 120, and can ensure the normal use of the screen 120 in the bending or curling process; meanwhile, due to the protection effect of the thermal expansion film layer 140, the thickness of the protective layer 130 on the light emitting side 104 of the screen body 120 can be reduced, and the thermal expansion film layer 140 is positioned in the groove 111 formed in the supporting layer 110, so that the overall thickness of the display module 100 is not increased, the thickness of the display module 100 can be reduced, the screen occupation ratio of the display device applied by the display module 100 is improved, and the width of the frame is reduced.

Fig. 8 is a schematic structural diagram of a display device according to an embodiment of the present application.

In a third aspect, referring to fig. 8, there is further provided a display apparatus 400 including a housing (not shown) and a display module 100 manufactured by the above manufacturing method, wherein the display module 100 is located in the housing.

It is understood that the display device 400 may be a personal terminal, a notebook computer, a tablet computer, a vehicle-mounted terminal, a camera, a smart wearable display terminal, etc., and the specific form of the display device 400 is not limited, nor is the embodiment of the application limited to the above examples.

The display device 400 provided in the embodiment of the application includes a housing and a display module 100 manufactured by the above manufacturing method, where the display module 100 includes a support layer 110, a screen 120 and a protection layer 130 that are stacked, the support layer 110 is located on a backlight side 103 of the screen 120, and the protection layer 130 is located on a light emitting side 104 of the screen 120; the supporting layer 110 in the bending area 101 is provided with a groove 111, the notch of the groove 111 faces away from the protective layer 130, and the groove 111 is internally provided with a thermal expansion film layer 140. By providing the groove 111 on the support layer 110 on the backlight side 103 of the screen 120 and providing the thermal expansion film layer 140 in the groove 111, the thermal expansion film layer 140 can protect the screen 120, and can ensure the normal use of the screen 120 in the bending or curling process; meanwhile, due to the protection effect of the thermal expansion film layer 140, the thickness of the protective layer 130 on the light emitting side 104 of the screen body 120 can be reduced, and the thermal expansion film layer 140 is positioned in the groove 111 formed in the supporting layer 110, so that the overall thickness of the display module 100 is not increased, the thickness of the display module 100 can be reduced, the screen occupation ratio of the display device applied by the display module 100 is improved, and the width of the frame is reduced.

In the description of the embodiments of the present application, it should be understood that the terms "mounted," "connected," and "connected" are to be interpreted broadly, as they may be, for example, fixedly connected, indirectly connected via an intermediary, in communication between two elements, or in an interaction relationship between two elements, unless explicitly stated and defined otherwise. The specific meaning of the terms in this application will be understood by those of ordinary skill in the art as the case may be.

The terms "upper," "lower," "front," "rear," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like refer to an orientation or positional relationship based on that shown in the drawings, merely for convenience of description and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present application. In the description of the present application, the meaning of "a plurality" is two or more, unless specifically stated otherwise.

The terms first, second, third, fourth and the like in the description and in the claims of the present application and in the above-described figures, are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that such data may be interchanged where appropriate such that embodiments of the present application described herein may be implemented in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application.

Claims (10)

1. The display module is characterized by comprising a bending area, wherein the display module comprises a support layer, a screen body and a protective layer which are arranged in a stacked mode, the support layer is positioned on the backlight side of the screen body, and the protective layer is positioned on the light emitting side of the screen body;

the support layer in the bending area is provided with a groove, the notch of the groove deviates from the protective layer, and the groove is internally provided with a thermal expansion film layer.

2. The display module according to claim 1, wherein the groove is a blind groove, the thermal expansion film layer is connected with the bottom of the groove, and the thermal expansion film layer is abutted with the side wall of the groove;

preferably, the preparation material of the thermal expansion film layer is polyethylene or polyethylene terephthalate or thermoplastic polyurethane elastomer;

preferably, the Young's modulus of the thermal expansion film layer is in the range of 2 x 10 ⁹ -3*10 ⁹ Pa。

3. The display module of claim 2, further comprising an adhesive layer between the support layer and the thermal expansion film layer, the thermal expansion film layer being connected to the support layer by the adhesive layer.

4. A display module according to claim 3, wherein a plurality of spheres are arranged in the adhesive layer, and the spheres are uniformly distributed in the adhesive layer at intervals;

preferably, the material of the sphere includes at least one of rubber and silica gel.

5. The display module of claim 2, wherein the screen includes a bend located in the bend region, and an orthographic projection of the bend on the support layer covers at least the recess.

6. The display module assembly of claim 5, wherein the front projection of the protective layer on the screen body at least covers the bending portion;

preferably, the distance between the edge of the protective layer and the edge of the corresponding bending part is in the range of 0.2-0.4mm.

7. The display module according to claim 2, wherein in a thickness direction of the display module, a thickness of the thermal expansion film layer is a first size, a sum of a thickness of the protective layer, a thickness of the screen body, and a thickness of the support layer where the groove is not provided is a second size, and a ratio of the first size to the second size ranges from 1/4 or more to 1/2 or less;

preferably, the ratio of the first dimension to the second dimension ranges from greater than or equal to 1/4 to less than or equal to 1/3.

8. A display module according to claim 3, wherein the sum of the thickness of the adhesive layer and the thickness of the thermal expansion film layer is greater than or equal to the depth of the groove in the thickness direction of the display module;

and/or, in the thickness direction of the display module, the ratio of the depth of the groove to the thickness of the supporting layer without the groove is greater than or equal to 1/2 and less than or equal to 3/4.

9. A method for manufacturing a display module, wherein the display module has a bending region, the method comprising:

providing a support layer, a screen body and a protective layer which are arranged in a stacked manner, wherein the support layer is positioned on the backlight side of the screen body, the protective layer is positioned on the light emitting side of the screen body, a groove is formed in the support layer positioned in the bending region, and the notch of the groove is away from the protective layer;

a thermal expansion film filling piece is arranged in the groove;

and heating the display module, bending the display module along the bending area, and heating and expanding the thermal expansion film filling piece to form a thermal expansion film layer.

10. The method of manufacturing a display module according to claim 9, wherein a space is provided between the side wall of the thermal expansion film filling member and the groove side wall of the groove, and the space is in the range of 0.1-0.3mm.

Images