CN112447097A

CN112447097A - Display module, manufacturing method thereof and electronic equipment

Info

Publication number: CN112447097A
Application number: CN201910824255.2A
Authority: CN
Inventors: 贾玉虎
Original assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Current assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Priority date: 2019-09-02
Filing date: 2019-09-02
Publication date: 2021-03-05

Abstract

The application relates to a display module, a manufacturing method thereof and electronic equipment, wherein the manufacturing method comprises the following steps: providing a display panel; the display panel comprises a central area and an edge area surrounding the central area; placing the display panel in a profiling jig; and carrying out local heating treatment on the edge area, wherein the edge area can be subjected to pre-bending deformation relative to the central area along the profiling jig. This application embodiment carries out heat treatment to display panel to make marginal area's part take place the pre-bending deformation along the profile modeling tool, so that display panel laminates with transparent cover plate, especially with transparent cover plate's bight position, thereby improve quality problems such as piling up, fracture of display panel, and then improve display module's display effect.

Description

Display module, manufacturing method thereof and electronic equipment

Technical Field

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

Background

With the continuous popularization of electronic devices, electronic devices have become indispensable social and entertainment tools in people's daily life, and people have higher and higher requirements for electronic devices. At present, electronic devices (such as mobile phones) are no longer limited to existing flat panel displays, but focus more on curved displays (such as quadric screens), so that users can obtain larger display fields and better aesthetic appearance and handle feeling.

Disclosure of Invention

The embodiment of the application provides a manufacturing method of a display module, and the manufacturing method comprises the following steps: providing a display panel; the display panel comprises a central area and an edge area surrounding the central area; placing the display panel in a profiling jig; and carrying out local heating treatment on the edge area, wherein the edge area can be subjected to pre-bending deformation relative to the central area along the profiling jig.

The embodiment of the application also provides a display module, wherein the display module comprises a transparent cover plate and a display panel, and the display panel is attached to the transparent cover plate; the transparent cover plate comprises a main body part, a first bending part, a second bending part and a first connecting part which are of an integrally formed structure, wherein the first bending part and the second bending part are respectively connected to two adjacent side edges of the main body part; the display panel comprises a main display part, a first auxiliary display part, a second auxiliary display part and a first transition part which are of an integrally formed structure, the main display part is attached to the main body part, the first auxiliary display part is attached to the first bending part, the second auxiliary display part is attached to the second bending part, and the first transition part is of a pre-bending deformation structure so that the first transition part can be attached to the first connecting part.

The embodiment of the application further provides electronic equipment, wherein, electronic equipment includes back shroud and above-mentioned display module assembly, and the back shroud is located to the display module assembly lid.

The beneficial effect of this application is: the manufacturing method provided by the application comprises the following steps: providing a display panel; the display panel comprises a central area and an edge area surrounding the central area; placing the display panel in a profiling jig; and carrying out local heating treatment on the edge area, wherein the edge area can be subjected to pre-bending deformation relative to the central area along the profiling jig. This application embodiment carries out heat treatment to display panel to make marginal area's part take place the pre-bending deformation along the profile modeling tool, so that display panel laminates with transparent cover plate, especially with transparent cover plate's bight position, thereby improve quality problems such as piling up, fracture of display panel, and then improve display module's display effect.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

FIG. 1 is a schematic structural diagram of an embodiment of an electronic device provided in the present application;

FIG. 2 is a schematic side view of the electronic device of FIG. 1;

FIG. 3 is an exploded view of the electronic device of FIG. 1;

FIG. 4 is a schematic diagram of the basic structure of the display panel in FIG. 3;

FIG. 5 is an exploded view of the display module shown in FIG. 3;

FIG. 6 is a schematic view of the transparent cover plate of FIG. 5 being bent;

FIG. 7 is a schematic cross-sectional view taken along direction VII-VII of the display module of FIG. 1;

FIG. 8 is a schematic cross-sectional view taken along line VIII-VIII of the display module shown in FIG. 1;

FIG. 9 is a partially enlarged schematic view of portion A of FIG. 1;

fig. 10 is a partially enlarged structural view of a portion B in fig. 3;

FIG. 11 is a schematic structural diagram of another embodiment of the bezel of FIG. 1;

FIG. 12 is a schematic view of the display module shown in FIG. 3;

FIG. 13 is a flowchart illustrating a method of fabricating a display module according to an embodiment of the present disclosure;

fig. 14 is a schematic view illustrating a principle of the heat shrinking process performed on the display panel of fig. 13.

Detailed Description

The present application will be described in further detail with reference to the following drawings and examples. It is to be noted that the following examples are only illustrative of the present application, and do not limit the scope of the present application. Likewise, the following examples are only some examples and not all examples of the present application, and all other examples obtained by a person of ordinary skill in the art without any inventive work are within the scope of the present application.

Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. It is explicitly and implicitly understood by one skilled in the art that the embodiments described herein can be combined with other embodiments.

The inventors of the present application have found, through long-term research: because the functional plates such as the organic layer, the inorganic layer and the like in the display panel are generally prepared by the evaporation process, the structure is fragile; for a curved display (e.g. a quad flat panel), the main difficulty of manufacturing is that when the display panel is attached to four corners of the transparent cover, the functional boards such as the organic layer and the inorganic layer are easily stacked and broken due to extrusion, thereby causing abnormal display of the quad flat panel. In this regard, the present application proposes the following examples.

Referring to fig. 1 to 3 together, fig. 1 is a schematic structural diagram of an embodiment of an electronic device provided in the present application, fig. 2 is a schematic side structural diagram of the electronic device in fig. 1, and fig. 3 is an exploded structural diagram of the electronic device in fig. 1.

The electronic device 10 of the present embodiment may be a portable device such as a mobile phone, a tablet computer, a notebook computer, and a wearable device. The embodiment of the present application takes the electronic device 10 as a mobile phone as an example for description. The electronic device 10 of the embodiment of the present application includes a display module 11, a back cover 12, and a frame 13. The display module 11 and the rear cover plate 12 are respectively connected to the frame 13, that is, the display module 11 is covered on the rear cover plate 12, so that the display module 11 and the rear cover plate 12 form a basic structure for clamping the frame 13 together after the three are assembled, as shown in fig. 1 and 2. For example: the display module 11 and the rear cover plate 12 can be respectively covered on two opposite sides of the frame 13 by one or a combination of assembling modes such as clamping, gluing, welding and the like.

The display module 11 may be a screen such as an lcd (liquid Crystal display), an OLED (Organic Light-Emitting Diode), a Mini-LED, or a Micro-LED. In the embodiment of the present application, the display module 11 is an OLED screen for example. Generally, the display module 11 includes a transparent cover 111 and a display panel 112, as shown in fig. 3. The display panel 112 may be attached to the transparent cover 111 by a sealant such as OCA (optical Clear Adhesive) or PSA (Pressure Sensitive Adhesive). In the embodiment of the present application, in order to facilitate the bonding of the display panel 112 and the transparent cover plate 111 and increase the bonding effect of the two at the corner position, a colloid with excellent fluidity and a thinner material is preferred; in view of the influence of the thickness of the colloid on the filling property of the ink, the colloid thickness is preferably 0.2mm or less, and more preferably 0.1 mm. Further, the transparent cover 111 may be tempered glass, which is mainly used to protect the display panel 112 and is used as an outer surface of the electronic device 10, so that a user can perform touch operations such as clicking, pressing, sliding and the like; the display panel 112 is mainly used for displaying a screen and serves as an interactive interface between a user and the electronic device 10. In some other embodiments, the outer surface of the electronic device 10 (i.e., the outer surface of the transparent cover plate 111) may be further provided with any one of other functional film layers, such as a tempered film, a frosted film, a decoration film, a peep-proof film, a water condensation film, and the like, so that the electronic device 10 provides different use effects for a user.

Generally, for an OLED screen, the basic structure of the display panel 112 includes a substrate 101, an organic electroluminescent layer 102, an encapsulation layer 103, and an optical film layer 104, which are stacked, as shown in fig. 4. The substrate 101 is far away from the transparent cover plate 111, and the optical film layer 104 is close to the transparent cover plate 111, that is, one side of the display panel 112 close to the optical film layer 104 is attached to the transparent cover plate 111. In the embodiment of the present application, the substrate 101 may be a polyimide film, a thermoplastic polyurethane film, a heat shrinkable film such as a polyolefin heat shrinkable film, an oriented polystyrene heat shrinkable film, a polyethylene terephthalate heat shrinkable film, or the like, so that the display panel 112 can be subjected to bending or heat shrinking treatment. Preferably, the substrate 101 of the embodiment of the present application is a heat shrinkable film to enable the display panel 112 to undergo pre-bending deformation during the heat shrinkage process. The organic electroluminescent layer 102 generally includes a light emitting control layer, a light emitting unit and a pixel unit (none of which are shown in fig. 4), and is mainly used for displaying pictures and different colors. The encapsulation layer 103 generally includes a plurality of inorganic and/or organic layers (not shown in fig. 4) stacked alternately, and is mainly used for blocking the organic electroluminescent layer 102 from being corroded by water, oxygen, and the like in the external environment, so as to prolong the service life of the organic electroluminescent layer 102. The optical film 104 generally includes a polarizer and an 1/4 wavelength phase film (neither shown in fig. 4), that is, the optical film 104 may be a circular polarizer, and is mainly used to eliminate the reflected light after the ambient light irradiates the display panel 112, so as to increase the contrast of the display panel 112. In the embodiment of the present application, in order to facilitate the bonding between the display panel 112 and the transparent cover plate 111 and increase the bonding effect between the display panel and the transparent cover plate at the corner, the optical film layer 104 with a thinner material is preferred, the thickness of the optical film layer 104 is preferably less than 0.147mm, and the thickness of the optical film layer 104 is more preferably 0.05 mm.

The rear cover 12 may be a battery cover of the electronic device 10, and may be made of glass, metal, hard plastic, or other electrochromic materials. The rear cover 12 has a certain structural strength, and is mainly used to protect the electronic device 10 together with the transparent cover 111. Accordingly, the material of the frame 13 may be glass, metal, rigid plastic, or the like. The frame 13 also has a certain structural strength, and is mainly used for supporting and fixing functional components such as a battery, a main board, a fingerprint module and a camera module inside the electronic device 10. Further, since the back cover plate 12 and the frame 13 are generally directly exposed to the external environment, the material of the back cover plate 12 and the frame 13 may preferably have certain wear-resistant, corrosion-resistant, scratch-resistant, and other properties, or the outer surface of the back cover plate 12 and the frame 13 (i.e., the outer surface of the electronic device 10) may be coated with a layer of functional material for wear-resistant, corrosion-resistant, scratch-resistant. In some embodiments, the back cover plate 12 and the frame 13 may be two separate structural members, as shown in fig. 3, and they may be assembled by one or a combination of clamping, gluing, and welding. In this case, the frame 13 may further extend into the electronic device 10, thereby forming a middle plate, a middle frame, and the like. In other embodiments, the rear cover plate 12 and the frame 13 may be an integral structure. For example: the two can be directly prepared by stamping, injection molding and the like.

Generally, the electronic device 10 may have a box-like appearance structure as a whole, that is, the display module 11, the rear cover 12 and the frame 13 may be rectangular. The display module 11 has four side edges, the rear cover plate 12 also has four side edges, and the frame 13 also has four side edges correspondingly; the two side edges of each structure are generally rounded to enhance the aesthetic appearance and grip of the electronic device 10. Further, at least one side edge of at least one of the display module 11 and the rear cover 12 connected to the frame 13 is bent toward the frame 13. In other words, at least one of the four side edges of the display module 11 is bent toward the frame 13; and/or at least one of the four side edges of the rear cover 12 is bent toward the bezel 13.

It should be noted that the side edges in the embodiments of the present application are simply said, and the width of the side edges and the size of the display module 11, the rear cover 12 and the frame 13 in the thickness direction of the electronic device 10 are not considered. Further, the side edges described in the embodiments of the present application should not be simply understood as lines in a general sense.

In some embodiments, the four side edges of the display module 11 and the four side edges of the rear cover plate 12 may be curved toward the frame 13, as shown in fig. 1 to 3, that is, the side edges may be curved, and the effect of reducing or even hiding the width of the black edge of the display module 11 is achieved by four-side bending, so that a user can obtain a larger display view when using the electronic device 10. Further, in the embodiment of the present disclosure, the display module 11 and the rear cover 12 may have symmetrical structures relative to the frame 13, as shown in fig. 2, so that a user can obtain better aesthetic appearance and hand-holding feeling when using the electronic device 10. In other embodiments, the display module 11 and the rear cover 12 may have a single-curved, double-curved, or triple-curved structure, or only one of the display module 11 and the rear cover 12 may have the curved structure. The electronic device 10 in the embodiment of the present application is described by taking a structure in which the display module 11 and the back cover 12 are all four-sided curved as an example. The electronic device 10 shown in fig. 1 to 3 only describes a portion (e.g., one quarter) of the display module 11, the rear cover 12 and the frame 13, and the structures of other portions are the same as or similar to those in the drawings, and are not repeated herein. The detailed structure of the quarter portion of the display module 11 will be described in detail below.

Referring to fig. 5 to 8 together, fig. 5 is an exploded view of the display module shown in fig. 3, fig. 6 is a schematic view illustrating a principle of bending the transparent cover plate shown in fig. 5, fig. 7 is a schematic view illustrating a cross-sectional structure of the display module shown in fig. 1 along a direction VII-VII, and fig. 8 is a schematic view illustrating a cross-sectional structure of the display module shown in fig. 1 along a direction VIII-VIII.

The transparent cover 111 includes a main body 1111, a first bending portion 1112, a second bending portion 1113, and a first connecting portion 1114. The first bending portion 1112 and the second bending portion 1113 are connected to two adjacent sides of the main body portion 1111, respectively. The first connecting portion 1114 is connected to the main body portion 1111, the first bending portion 1112, and the second bending portion 1113 corresponding to the corner portion of the main body portion 1111, that is, the first connecting portion 1114 is located at the intersection of the first bending portion 1112 and the second bending portion 1113. The first bending portion 1112, the second bending portion 1113, and the first connecting portion 1114 are bent and extended toward the same side of the main body portion 1111, so that the transparent cover 111 is disposed in a bent shape, as shown in fig. 5.

It should be noted that the integrally formed structure in the embodiment of the present application means that the structure of the product is an organic whole, and the product cannot be easily split or divided. For example: the embodiment of the present application may utilize a hot bending technique to bend the flat tempered glass into the curved transparent cover 111 according to predetermined process parameters, as shown in fig. 6, and the curved portion and the flat portion are naturally in a circular arc transition. The above process parameters can be reasonably designed according to factors such as the type of raw material, the bending angle and the curvature radius, and are not limited herein. Therefore, lines between the main body portion 1111, the first bending portion 1112, the second bending portion 1113, and the first connecting portion 1114 in fig. 5 are only for illustrating the boundary lines between the above-mentioned portions. In other words, for the transparent cover 111 in an actual product, the lines are not true, i.e. the smooth transitions between the various parts.

In some embodiments, the first curved portion 1112 and the second curved portion 1113 have the same radius of curvature, that is, both are curved with respect to the main body portion 1111 to simplify the manufacturing process of the transparent cover plate 111. In other embodiments, the radii of curvature of the first curved portion 1112 and the second curved portion 1113 may be different, that is, the degree of curvature of the first curved portion 1112 and the second curved portion 1113 relative to the main body portion 1111 is different, so that the transparent cover 111 can have a richer appearance. In the present embodiment, the same radius of curvature of the first curved portion 1112 and the second curved portion 1113 is taken as an example for explanation. Furthermore, the curvature radius of the first curved portion 1112 and the second curved portion 1113 is smaller than or equal to the curvature radius of the first connecting portion 1114, that is, the degree of curvature of the first connecting portion 1114 relative to the main body portion 1111 may be smaller than the degree of curvature of the first curved portion 1112 and the second curved portion 1113, or the same. In other words, in the process of preparing the transparent cover 111, the first connection portions 1114 and the main body portion 1111 may be made flatter as shown in fig. 7 and 8, so that the display panel 112 and the transparent cover 111 (especially the first connection portions 1114) can be attached to each other. For example: the first and second

curved portions

1112 and 1113 may have a radius of curvature of 3mm, and the first connection portion 1114 may have a radius of curvature of 10 mm.

In the embodiment of the present application, the first bending portion 1112 and the second bending portion 1113 are bent with respect to the main body portion 1111 by an angle θ, as shown in fig. 6, and θ is 60 ° ≦ θ ≦ 90 °. The value of θ is mainly used to measure the degree of deviation of the side surface (i.e. the surface where the first bending portion 1112 and the second bending portion 1113 are located) of the transparent cover 111 from the front surface (i.e. the surface where the main body portion 1111 is located). For example: when θ approaches 90 ° (e.g., θ ═ 88 °), the side of the transparent cover plate 111 is almost perpendicular to its front face; then, when the display panel 112 is attached to the transparent cover plate 111, the picture displayed by the display panel 112 can extend from the front of the display module 11 to the side surface thereof in a form similar to a waterfall, so that the display module 11 creates a visual effect of surrounding display, thereby bringing a visual experience different from the bang screen, the water drop screen, the hole digging screen, the lifting full-face screen, the sliding cover full-face screen and other full-face screens to the user for the electronic device 10, and further increasing the experience and competitiveness of the electronic device 10.

Further, the display panel 112 includes a main display portion 1121, a first sub-display portion 1122, a second sub-display portion 1123, and a first transition portion 1124, which are integrally molded. After the display panel 112 is attached to the transparent cover 111, the main display portion 1121 is attached to the main body portion 1111 so that the front surface of the display module 11 can display a screen, the first sub display portion 1122 is attached to the first bending portion 1112, and the second sub display portion 1123 is attached to the second bending portion 1113 so that the side surface of the display module 11 can also display a screen, as shown in fig. 7.

Note that lines between the main display portion 1121, the first sub-display portion 1122, the second sub-display portion 1123, and the first transition portion 1124 in fig. 5 are only for illustrating boundaries between the above portions, and are similar to the related description of the transparent cover 111. In other words, for the display panel 112 in an actual product, the lines are not true, i.e., the transition between the parts is smooth.

Based on the above detailed description, since the functional plates such as the organic layer and the inorganic layer in the display panel 112 are generally formed by the evaporation process, the structure thereof is fragile; then, after the main display portion 1121, the first sub-display portion 1122, and the second sub-display portion 1123 of the display panel 112 are respectively bonded to the main body portion 1111, the first curved portion 1112, and the second curved portion 1113 of the transparent cover 111, the portions (e.g., corresponding to the corner portions of the first connecting portion 1114) to which the display panel 112 is not bonded are pressed together, thereby causing quality problems such as stacking and breaking. At this time, the appearance of the display panel 112 is too large locally, so that the first transition portion 1124 cannot be smoothly attached to the first connection portion 1114. Therefore, the first transition portion 1124 of the embodiment of the present application is a pre-bending deformation structure for improving the above-mentioned squeezing problem of the display panel 112. For example: the pre-bending deformation structure may be formed by performing a thermal shrinkage process on a portion of the display panel 112 in advance, so that the first transition portion 1124 is bent in advance and can be flatly attached to the first connection portion 1114, as shown in fig. 8, thereby improving the quality problems of stacking, breaking, and the like, further improving the display effect of the display module 11, and increasing the reliability of the electronic device 10.

For OLED screens, the organic electroluminescent layer 102 can be generally formed by evaporating organic layers and/or inorganic materials. The pixel unit in the organic electroluminescent layer 102 is generally fragile in structure. Generally, the higher the density of the pixel units (pixel density for short), the better the display effect of the display panel 112; accordingly, the smaller the gap between the pixel units, the weaker the ability of the first transition portion 1124 to undergo pre-bending deformation, and the higher the probability that the display panel 112 (middle pixel unit) will be stacked. Conversely, the lower the pixel density, the worse the display effect of the display panel 112; accordingly, the larger the gap between the pixel units, the stronger the ability of the first transition portion 1124 to undergo pre-bending deformation, and the lower the probability that the display panel 112 (middle pixel unit) will be stacked. Therefore, in the embodiment of the present application, in consideration of the display effect and the stacking problem of the display panel 112, the pixel density of the first sub-display portion 1122 and the second sub-display portion 1123 is equal to and less than the pixel density of the main display portion 1121, and the pixel density of the first transition portion 1124 is less than or equal to the pixel density of the first sub-display portion 1122 and the second sub-display portion 1123, so that the first sub-display portion 1122, the second sub-display portion 1123, and the first transition portion 1124 can exhibit an excellent display effect and improve the stacking problem. In addition, by properly designing the pixel density of the main display portion 1121, the first sub-display portion 1122, the second display portion 1123, and the first transition portion 1124, the display difference between the above portions in the display panel 112 can be reduced to some extent, thereby increasing the overall uniformity of the display effect of the display module 11. For example: when designing the pixel density of each portion of the display panel 112, the pixel density of the main display portion 1121, the first sub-display portion 1122, and the second display portion 1123 may be designed to be 200, and the pixel density of the first transition portion 1124 may be designed to be 100 or 80.

Generally, when the display module 11 is operated for a long time, the display panel 112 generates a large amount of heat. Although the transparent cover 111 is directly exposed to the external environment to perform the heat dissipation function, the heat dissipation capability of the transparent cover 111 (the main component is silicon dioxide) is limited, which easily causes the above heat accumulation, and further affects the display effect of the display module 11. In this embodiment, the display module 11 may further include a function board 115, and the function board 115 is attached to a surface of the display panel 112 away from the transparent cover 111. Wherein, the function board 115 can be a heat-dissipating copper foil, a graphite sheet, etc., and is mainly used to assist the transparent cover plate 111 to dissipate heat of the display panel 112, so as to improve the heat dissipation effect of the display module 11, thereby ensuring the display effect of the display module 11. Further, the size, shape, etc. of the function board 115 may be the same as or similar to those of the display panel 112; in addition, the portion of the function board 115 corresponding to the first transition portion 1124 is provided with an avoiding structure 113, as shown in fig. 5, so that the function board 115 can be attached to not only the main display portion 1121, the first sub display portion 1122, and the second sub display portion 1123, but also the first transition portion 1124, thereby increasing the heat dissipation capability of each portion of the display module 11 and further ensuring the display effect of the display module 11. The avoiding structure 113 may be a cut arranged in a rectangular or wedge shape, a hole arranged in a circular or semicircular shape, or some other irregular shapes. In other embodiments, since the ratio of the first transition portion 1124 on the display panel 112 is not very large, the portion of the function board 115 corresponding to the first transition portion 1124 may be directly removed, that is, the function board 115 is not attached to the first transition portion 1124, so as to simplify the structure of the function board 115 and the assembly process of the display module 11.

Referring to fig. 9 and 10 together, fig. 9 is a partially enlarged structural diagram of a portion a in fig. 1, and fig. 10 is a partially enlarged structural diagram of a portion B in fig. 3.

The frame 13 includes a bottom wall 131 and a side wall 132, and the side wall 132 stands on an edge of the bottom wall 131 and extends away from the bottom wall 131. The bottom wall 131 may be simply considered a middle panel of the electronic device 10, with the side wall 132 partially exposed to the external environment for contact with a user. The side wall 132 and the bottom wall 131 may be an integrally formed structure, that is, the frame 13 may be an integrally formed structural member, so that the structure of the frame 13 can be simplified, and the manufacturing cost of the frame 13 is reduced. Of course, in other embodiments, the side wall 132 and the bottom wall 131 can be connected by one or a combination of clamping, gluing, welding, and the like. In the embodiment of the present application, the display module 11 is disposed on a surface of the sidewall 132 away from the bottom wall 131, and the rear cover 12 is disposed on the bottom wall 131 and a surface of the sidewall 132 close to the bottom wall 131, as shown in fig. 1 to 3.

The bottom wall 132 includes a first bottom surface 1321 and a second bottom surface 1322. The first bottom surface 1321 is adjacent to the rear cover 12 and may be used to attach the rear cover 12, as shown in fig. 9; the second bottom surface 1322 may be used to mount and fix functional components such as a battery, a motherboard, a fingerprint module, and a camera module. The sidewall 132 includes a first side 1321, a second side 1322, a third side 1323, and a fourth side 1324 connected in sequence. The first side 1321 and the third side 1323 are disposed opposite to each other and are respectively used for connecting the rear cover plate 12 and the display module 11, as shown in fig. 10; the second side 1322 is exposed to an external environment to contact a user when using the electronic device 10. In the embodiment of the present application, the width of the second side surface 1322 in the thickness direction of the frame 13 is less than or equal to 1.8mm, and preferably, the width of the second side surface 1322 in the thickness direction of the frame 13 is greater than or equal to 1.4mm and less than or equal to 1.6mm, so that the display module 11 can be bent towards the frame 13 as much as possible, and the electronic device 10 can obtain a larger display field of view. The second side 1322 may be a straight plane or an arc convex surface, so that the electronic device 10 can obtain better aesthetic appearance and handle feeling. Further, an edge of the first side 1321 away from the second side 1322 is connected to the first bottom surface 1321, and an edge of the fourth side 1324 away from the third side 1323 is connected to the second bottom surface 1322, as shown in fig. 10, so that the side wall 132 is connected to the bottom wall 132.

It should be noted that, the thickness direction of the frame 13 in the embodiment of the present application refers to the thickness direction of the frame 13 when the frame 13 is applied to the electronic device 10, which is the overall thickness direction of the electronic device 10.

Further, the width of the fourth side surface 1324 in the thickness direction of the bezel 13 is greater than the width of the second side surface 1322 in the thickness direction of the bezel 13, that is, the side wall 132 becomes thinner from the inside to the outside of the electronic device 10, as shown in fig. 10, so that the bezel 13 can meet both requirements of ultra-thinning and structural strength, thereby increasing the reliability of the bezel 13.

Based on the above detailed description, since the display module 11 and the back cover 12 may be both curved structures that are bent toward the frame 13, when the display module 11 is connected to the third side 1323 and the back cover 12 is connected to the first bottom 1321 and the first side 1321, an arc-shaped space is formed between the display module 11 and the back cover 12, as shown in fig. 9. Therefore, the first side surface 1321 may be a curved surface having a radius of curvature the same as or similar to the curved radius of curvature of the back cover 12, and the third side surface 1323 may also be a curved surface having a radius of curvature the same as or similar to the curved radius of curvature of the display module 11, as shown in fig. 9, so that the side wall 132 supports the back cover 12 and the display module 11 through the first side surface 1321 and the third side surface 1323, respectively, thereby increasing the structural strength of the whole electronic device 10 and further increasing the reliability of the electronic device 10. At this time, the first side 1321 and the third side 1323 are disposed to be arc convex surfaces, the display module 11 and the back cover 12 may be bent toward the bezel 13, the display module 11 may also extend along the third side 1323, and the back cover 12 may also extend along the first side 1321. In other embodiments, for example, when the curvature radius of the first curved portion 114 and the second curved portion 122 is larger, the first side surface 1321 and the third side surface 1323 may be disposed in a straight plane, so as to simplify the structures of the first side surface 1321 and the third side surface 1323, thereby reducing the difficulty in processing the supporting portion 134.

In the embodiment of the present application, the first side 1321 is recessed toward a direction close to the third side 1323 to form a first groove 1325, the third side 1323 is recessed toward a direction close to the first side 1321 to form a second groove 1326, a distance between the second groove 1326 and the first groove 1325 is smaller than a width of the second side 1322 in the thickness direction of the bezel 13, as shown in fig. 10, so that the back cover 12 can extend to the first groove 1325 along the first side 1321, and the display module 11 can extend to the second groove 1326 along the third side 1323, as shown in fig. 9, so that the display module 11 and the back cover 12 can be partially hidden in the side wall 13, that is, the bezel 13 can protect edge regions of the display module 11 and the back cover 12 to a certain extent, and further increase reliability of the electronic device 10. In other embodiments, a first step surface 1327 is formed at a connection point of the first side surface 1321 and the second side surface 1322, a second step surface 1328 is formed at a connection point of the third side surface 1323 and the second side surface 1322, and a distance between the second step surface 1328 and the first step surface 1327 is equal to a width of the second side surface 1322 in the thickness direction of the bezel 13, as shown in fig. 11, so that an end surface of the back cover 12 abuts against the first step surface 1327, and an end surface of the display module 11 abuts against the second step surface 1328, so as to simplify a structure of the sidewall 132, and reduce a processing difficulty of the bezel 13.

Referring to fig. 12, fig. 12 is a schematic view of a complete structure of the display module shown in fig. 3. It should be noted that the display module shown in fig. 3 can be simply regarded as a part (e.g., a quarter) of the display module shown in fig. 12. Therefore, other structures of the display module in fig. 12 are the same as or similar to those of the display module in fig. 3, and reference may be made to the above detailed description for brevity. The structure of the display module 11 will be briefly described as a whole.

The transparent cover 111 is integrally formed, and includes a third bending portion 1115, a fourth bending portion 1116, a second connecting portion 1117, a third connecting portion 1118, and a fourth connecting portion 1119 in addition to the main body portion 1111, the first bending portion 1112, the second bending portion 1113, and the first connecting portion 1114.

The main body 1111 may be rectangular, the third bending portion 1115 and the first bending portion 1112 are respectively connected to two opposite sides of the main body 1111, and the fourth bending portion 1116 and the second bending portion 1113 are respectively connected to two opposite sides of the main body 1111, as shown in fig. 12. Further, the first connection portion 1114, the second connection portion 1117, the third connection portion 1118, and the fourth connection portion 1119 are connected to the main body portion 1111 at positions corresponding to one corner of the main body portion 1111, as shown in fig. 12. Specifically, the first connecting portion 1114 is continuously disposed between the first bending portion 1112 and the second bending portion 1113, the second connecting portion 1117 is continuously disposed between the second bending portion 1113 and the third bending portion 1115, the third connecting portion 1118 is continuously disposed between the third bending portion 1115 and the fourth bending portion 1116, and the fourth connecting portion 1119 is continuously disposed between the fourth bending portion 1116 and the first bending portion 1112. In the embodiment of the present application, the first bending portion 1112, the second bending portion 1113, the third bending portion 1115, the fourth bending portion 1116, the first connecting portion 1114, the second connecting portion 1117, the third connecting portion 1118, and the fourth connecting portion 1119 are bent and extended toward the same side of the body portion 1111, so that the transparent cover plate 111 is integrally disposed in a bent shape, as shown in fig. 12.

Further, the main body portion 1111 may be disposed in a planar shape to facilitate the user to use the electronic device 10 and simplify the manufacturing process of the transparent cover plate 111. On the other hand, the main body portion 1111 may be disposed in a rounded manner at four corner positions corresponding to the first connection portion 1112, the second connection portion 1117, the third connection portion 1118, and the fourth connection portion 1119, respectively; on the other hand, the third bending portion 1115 and the first bending portion 1112 may be symmetrically disposed with respect to the body portion 1111, the fourth bending portion 1116 and the second bending portion 1113 may be symmetrically disposed with respect to the body portion 1111, and the first connection portion 1114, the second connection portion 1117, the third connection portion 1118, and the fourth connection portion 1119 may be symmetrically disposed with respect to the body portion 1111, as shown in fig. 12, so that the transparent cover 111 appears more rounded in appearance and more uniform in overall structure, thereby increasing the aesthetic appearance and grip feel of the electronic device 10.

The display panel 112 has an integrally molded structure, and includes a third sub display portion 1125, a fourth sub display portion 1126, a second transition portion 1127, a third transition portion 1128, and a fourth transition portion 1129 in addition to the main display portion 1121, the first sub display portion 1122, the second sub display portion 1123, and the first transition portion 1124.

After the display panel 112 is attached to the transparent cover 111, the main display portion 1121 is attached to the main body portion 1111 so that the front surface of the display module 11 can display a screen. The first sub-display portion 1122 is attached to the first bending portion 1112, the second sub-display portion 1123 is attached to the second bending portion 1113, the third sub-display portion 1125 is attached to the third bending portion 1115, and the fourth sub-display portion 1126 is attached to the fourth bending portion 1116, so that the screen can be displayed on the side surface of the display module 11. In the embodiment of the present application, the first transition portion 1124, the second transition portion 1127, the third transition portion 1128, and the fourth transition portion 1129 are all pre-bent and deformed structures, that is, the display panel 112 is pre-shrunk corresponding to four corner portions of the first connection portion 1114, the second connection portion 1117, the third connection portion 1118, and the fourth connection portion 1119 of the transparent cover 111, so that the first transition portion 1124, the second transition portion 1127, the third transition portion 1128, and the fourth transition portion 1129 are pre-bent and deformed. Through the pre-bending processing mode, the first transition portion 1124 can be flatly attached to the first connection portion 1114, the second transition portion 1127 can be flatly attached to the second connection portion 1117, the third transition portion 1128 can be flatly attached to the third connection portion 1118, and the fourth transition portion 1129 can be flatly attached to the fourth connection portion 1119, so that quality problems of stacking, breaking and the like when the display panel 112 is attached to the transparent cover plate 111 are improved, the display effect of the display module 11 is further improved, and the reliability of the electronic device 10 is increased.

Further, after the display panel 112 and the transparent cover 111 are attached to each other, the third sub-display 1125 and the first sub-display 1122 may be provided symmetrically with respect to the main display 1121, and the fourth sub-display 1126 and the second sub-display 1123 may be provided symmetrically with respect to the main display 1121; the first transition portion 1124, the second transition portion 1127, the third transition portion 1128, and the fourth transition portion 1129 may be symmetrically disposed with respect to the main display portion 1121, so that the display panels 112 are more uniform in the overall structure, and the symmetry of the display screen of the display module 11 is increased.

Referring to fig. 13, fig. 13 is a flowchart illustrating a manufacturing method of a display module according to an embodiment of the disclosure. The manufacturing method comprises the following steps:

s131: a display panel is provided.

The display panel includes a central region 201 and an edge region 202 surrounding the central region 201, as shown in fig. 14. The central region 201 is mainly used for bonding to the main body portion of the transparent cover plate, and the edge region 202 is mainly used for bonding to the other regions of the transparent cover plate except the main body portion.

Further, the display panel may be rectangular, and four corner positions of the display panel may be rounded, as shown in fig. 14, so as to improve the situation that the four corner positions are easily squeezed when the display panel is attached to the transparent cover plate, thereby improving the quality problems of stacking, breaking, and the like. Wherein, the fillet size isoparametric of display panel can carry out reasonable design according to display panel and transparent cover plate's laminating demand, does not do the restriction here.

In the embodiment of the present application, before the heat shrinkage process is performed on the display panel, the display panel may be disposed in a flat plate shape; in the process of carrying out heat shrinkage treatment on the display panel, the display panel is subjected to bending deformation due to heating; after the heat shrinkage treatment is performed on the display panel, the display panel is disposed in a curved shape. In the embodiment of the present application, the substrate of the display panel is preferably a heat shrinkable film for increasing the bending deformation capability of the display panel during the heat shrinkage treatment. Among them, the heat shrinkable film may be a polyolefin heat shrinkable film, an oriented polystyrene heat shrinkable film, a polyethylene terephthalate heat shrinkable film, or the like.

S132: and placing the display panel in the profiling jig.

The profiling fixture 300 includes a main wall 301 and a sidewall 302 surrounding the main wall 301, wherein the sidewall 302 and the main wall 301 are in arc transition, as shown in fig. 14. The specific size, shape, structure, etc. of the profiling fixture 300 can be designed reasonably according to the actual heat shrinkage process, and are not limited herein.

For example: when the display panel is placed on the profiling fixture 300, the central region of the display panel can be attached to the main body wall 301 of the profiling fixture 300, so that the display panel and the profiling fixture are pre-fixed, and the reliability of the subsequent heat shrinkage treatment is improved. Further, the substrate of the display panel contacts the main body wall 301, so that the display panel is bent and deformed toward the profiling fixture 300 during the subsequent heat shrinkage process.

S133: and carrying out local heating treatment on the edge area, wherein the edge area can be subjected to pre-bending deformation relative to the central area along the profiling jig.

In the embodiment of the present application, the laser heater 400 may be used to perform a local heating process on the edge region 202, so that the edge region 202 can undergo a thermal shrinkage deformation along the sidewall 302, thereby forming a pre-bending deformation structure of the edge region 202 relative to the central region 201, so as to facilitate the attachment of the display panel to the transparent cover plate, especially to the corner position of the transparent cover plate.

It should be noted that the local heating treatment described in the embodiments of the present application mainly means that a local region (for example, a portion shown as a region 203 in fig. 14) corresponding to a corner position of the display panel and the transparent cover plate is subjected to a heat shrinkage treatment.

Generally, the subsequent display panel is attached to the transparent cover plate, and the probability of the display panel being squeezed is larger and larger in the direction from the edge region 202 to the central region 201, and the squeezing area is also larger and larger. In other words, the degree of the pre-bending deformation of the edge region 202 is not necessarily the same when the display panel is subjected to the heat shrinkage treatment. In contrast, in the embodiment of the present application, in the direction in which the edge area 202 is far away from the central area 201, as shown in fig. 14, on one hand, the light spot irradiated by the laser heater 400 on the edge area 202 is a wedge-shaped light spot, and the width of the wedge-shaped light spot is gradually increased, so that the deformation range of the edge area 202 is gradually increased; on the other hand, the heated temperature of the edge region 202 gradually increases, so that the deformation amount of the edge region 202 gradually increases, and the degree of the pre-bending deformation of the edge region 202 gradually increases, thereby meeting the subsequent requirement of the display panel and the transparent cover plate.

Since the thermal shrinkage film has good deformation capability when being heated, the temperature of the display panel can be 120-140 ℃ when the laser heater 400 performs thermal shrinkage treatment on the edge region 202.

Among them, the laser heater 400 may be an external one, as shown in fig. 14; the heat shrinkage treatment may be performed on the display panel from another direction (relative to the external one) by using a built-in type, that is, by using the heat shrinkage treatment, which is provided inside the copying jig 300. In other embodiments, a heating wire may be disposed inside the profiling fixture 300 to assist or replace the laser heater 400 to perform the heat shrinking process.

Further, after the display panel is subjected to the heat shrinkage treatment, the display panel can be attached to the transparent cover plate.

The transparent cover plate comprises a main body part, a first bending part, a second bending part and a first connecting part which are of an integrally formed structure. The first bending part and the second bending part are respectively connected to two adjacent sides of the main body part. The first connecting portion corresponds to a corner portion of the main body portion and is connected to the main body portion, the first bending portion and the second bending portion, that is, the first connecting portion is located at an intersection of the first bending portion and the second bending portion. The first bending part, the second bending part and the first connecting part are bent and extended towards the same side of the main body part, so that the transparent cover plate is arranged in a bending shape. For example: according to the embodiment of the application, the tempered glass in the flat plate shape can be bent into the transparent cover plate in the bent shape according to the preset process parameters by utilizing the hot bending technology, and the bent part and the flat plate part are in arc transition naturally.

For the specific structure of the transparent cover plate, reference may be made to fig. 1 to 12 and the related description thereof, which are not repeated herein.

The central region 201 is attached to the main body portion and serves as a main display portion, and the edge region 202 is attached to the first bending portion and the second bending portion and serves as a first sub-display portion and a second sub-display portion, respectively. After the display panel is subjected to the heat shrinkage treatment, the pre-bending deformation enables the edge region 202 to be further attached to the first connection portion and serve as a first transition portion.

Furthermore, the function board can be attached to one surface of the display panel far away from the transparent cover plate. The functional layer is mainly used for radiating the display panel together with the transparent cover plate, so that the radiating effect of the display module is improved. Wherein, the function board can be a radiating copper foil, a graphite sheet and the like. The functional board can also be subjected to incision or punching treatment so as to increase the attaching effect of the functional board and the display panel (particularly the corner position); the functional board can be directly removed from the corner position of the display panel, so that the functional board is not attached to the corner position of the display panel, the structure of the functional board is simplified, and the assembly difficulty is reduced.

For the specific structure of the display module, reference may be made to fig. 1 to 12 and the related description thereof, which are not repeated herein.

In some other embodiments, the profiling fixture 300 may be directly a transparent cover plate, that is, the central region 201 of the display panel may be attached to the main body of the transparent cover plate, and the edge region 202 of the display panel is attached to the first bending portion and the second bending portion of the transparent cover plate, and then the corner position of the edge region 202 corresponding to the first connection portion of the display panel is subjected to a local heating process, so that the edge region 202 is pre-bent and deformed along the first connection portion with respect to the central region 201, and the edge region 202 can be further attached to the first connection portion of the display panel.

The above description is only a part of the embodiments of the present application, and not intended to limit the scope of the present application, and all equivalent devices or equivalent processes performed by the content of the present application and the attached drawings, or directly or indirectly applied to other related technical fields, are also included in the scope of the present application.

Claims

1. A manufacturing method of a display module is characterized by comprising the following steps:

providing a display panel; the display panel comprises a central area and an edge area surrounding the central area;

placing the display panel in a profiling jig;

and carrying out local heating treatment on the edge area, wherein the edge area can be subjected to pre-bending deformation relative to the central area along the profiling jig.

2. The method of claim 1, wherein the substrate of the display panel is a heat shrinkable film.

3. The manufacturing method of claim 2, wherein the substrate of the display panel is one of a polyolefin heat shrinkable film, an oriented polystyrene heat shrinkable film and a polyethylene terephthalate heat shrinkable film.

4. The method as claimed in claim 2, wherein the profiling fixture comprises a main wall and a sidewall surrounding the main wall, the sidewall being in arc transition with the main wall;

the step of placing the display panel in a profiling jig comprises the following steps:

the central area is attached to the main body wall, and a base body of the display panel is in contact with the main body wall;

the step of locally heating the edge region, wherein the edge region can be subjected to pre-bending deformation relative to the central region along the profiling jig, comprises:

and carrying out local heating treatment on the edge area by using a laser heater, wherein the edge area can be subjected to thermal shrinkage deformation along the side wall, and a pre-bending deformation structure of the edge area relative to the central area is formed.

5. The manufacturing method according to claim 4, wherein a light spot of the laser heater irradiating the edge region is a wedge-shaped light spot, and a width of the wedge-shaped light spot is gradually increased in a direction in which the edge region is away from the central region, so that a deformation range of the edge region is gradually increased.

6. The production method according to claim 4, wherein the heated temperature of the edge region is gradually increased in a direction in which the edge region is away from the central region, so that the amount of deformation of the edge region is gradually increased.

7. The method according to claim 1, wherein the step of locally heating the edge region to deform the edge region along the profiling fixture in a pre-bending manner with respect to the central region further comprises:

attaching the display panel to a transparent cover plate;

the transparent cover plate comprises a main body part, a first bending part, a second bending part and a first connecting part, wherein the main body part, the first bending part, the second bending part and the first connecting part are of an integrally formed structure, the first bending part and the second bending part are respectively connected to two adjacent side edges of the main body part, the first connecting part corresponds to the corner position of the main body part and is connected to the main body part, the first bending part and the second bending part, and the first bending part, the second bending part and the first connecting part are bent and extend towards the same side of the main body part; the central region is attached to the main body portion and serves as a main display portion, the edge region is attached to the first bending portion and the second bending portion and serves as a first auxiliary display portion and a second auxiliary display portion respectively, and the pre-bending deformation enables the edge region to be further attached to the first connecting portion and serves as a first transition portion.

8. The manufacturing method according to claim 1, wherein the profiling jig is a transparent cover plate, the transparent cover plate includes a main body portion, a first bending portion, a second bending portion and a first connecting portion, the main body portion, the first bending portion, the second bending portion and the first connecting portion are integrally formed, the first bending portion and the second bending portion are respectively connected to two adjacent sides of the main body portion, the first connecting portion corresponds to a corner position of the main body portion and is connected to the main body portion, the first bending portion and the second bending portion, and the first bending portion, the second bending portion and the first connecting portion are bent and extended toward the same side of the main body portion;

the central region is attached to the main body and serves as a main display portion, and the edge region is attached to the first bending portion and the second bending portion and serves as a first sub-display portion and a second sub-display portion;

and carrying out local heating treatment on the corner position of the edge area corresponding to the first connecting part, wherein the edge area can be subjected to pre-bending deformation relative to the central area along the first connecting part, so that the edge area can be further attached to the first connecting part and serves as a first transition part.

9. A display module is characterized by comprising a transparent cover plate and a display panel, wherein the display panel is attached to the transparent cover plate; the transparent cover plate comprises a main body part, a first bending part, a second bending part and a first connecting part, wherein the main body part, the first bending part, the second bending part and the first connecting part are of an integrally formed structure, the first bending part and the second bending part are respectively connected to two adjacent side edges of the main body part, the first connecting part corresponds to the corner position of the main body part and is connected to the main body part, the first bending part and the second bending part, and the first bending part, the second bending part and the first connecting part are bent and extended towards the same side of the main body part; the display panel comprises a main display part, a first auxiliary display part, a second auxiliary display part and a first transition part which are of an integrally formed structure, wherein the main display part is pasted on the main body part, the first auxiliary display part is pasted on the first bending part, the second auxiliary display part is pasted on the second bending part, the first transition part is of a pre-bending deformation structure, and therefore the first transition part can be pasted on the first connecting part.

10. The display module according to claim 9, wherein the first curved portion and the second curved portion have the same radius of curvature and are smaller than or equal to the radius of curvature of the first connecting portion.

11. The display module of claim 10, wherein the first and second curved portions are curved with respect to the main body portion at an angle θ, and wherein θ is greater than or equal to 60 ° and less than or equal to 90 °.

12. The display module assembly of claim 9, wherein the main body portion and the main display portion are both rectangular; the transparent cover plate further comprises a third bending part, a fourth bending part, a second connecting part, a third connecting part and a fourth connecting part which are of an integrally formed structure, wherein the third bending part and the first bending part are respectively connected to two opposite side edges of the main body part, the fourth bending part and the second bending part are respectively connected to two opposite side edges of the main body part, the first connecting part, the second connecting part, the third connecting part and the fourth connecting part respectively correspond to one corner position of the main body part and are connected to the main body part, the second connecting part is connected and arranged between the second bending part and the third bending part, the third connecting part is connected and arranged between the third bending part and the fourth bending part, and the fourth connecting part is connected and arranged between the fourth bending part and the first bending part, the first bending portion, the second bending portion, the third bending portion, the fourth bending portion, the first connecting portion, the second connecting portion, the third connecting portion, and the fourth connecting portion extend in a bent manner toward the same side of the main body portion; the display panel further comprises a third auxiliary display part, a fourth auxiliary display part, a second transition part, a third transition part and a fourth transition part which are of an integrally formed structure, the third auxiliary display part is pasted and arranged on the third bending part, the fourth auxiliary display part is pasted and arranged on the fourth bending part, the second transition part is pasted and arranged on the third transition part and the fourth transition part, the second transition part is of a pre-bending deformation structure, so that the second transition part can be pasted and arranged on the second connecting part, the third transition part can be pasted and arranged on the third connecting part, and the fourth transition part can be pasted and arranged on the fourth connecting part.

13. The display module according to claim 12, wherein the third curved portion and the first curved portion are symmetrically disposed with respect to the main body portion, and the fourth curved portion and the second curved portion are symmetrically disposed with respect to the main body portion; the first connecting portion, the second connecting portion, the third connecting portion and the fourth connecting portion are symmetrically arranged relative to the main body portion.

14. The display module according to claim 13, wherein the third sub-display portion and the first sub-display portion are symmetrically disposed with respect to the main display portion, and the fourth sub-display portion and the second sub-display portion are symmetrically disposed with respect to the main display portion; the first transition portion, the second transition portion, the third transition portion and the fourth transition portion are symmetrically arranged relative to the main display portion.

15. The display module according to claim 12, wherein the main body portion is disposed in a planar shape, and four corner positions of the main body portion corresponding to the first connecting portion, the second connecting portion, the third connecting portion and the fourth connecting portion are rounded.

16. An electronic device, comprising a back cover and the display module of any one of claims 9-15, wherein the display module is disposed on the back cover.

17. The electronic device according to claim 16, wherein the rear cover plate is rectangular, and four edges of the rear cover plate are all curved toward the display module.