Display module, method for manufacturing display module, and display device

Abstract

The present invention relates to the technical field of display devices, and in particular, to a display module, and also to a preparation method thereof and a display device comprising the same. The display module comprises a substrate, a driving circuit layer, a light-emitting layer, a packaging layer, a color conversion layer and a light-emitting layer which are stacked in sequence, wherein: a plurality of light-emitting units are arranged in an array in the light-emitting layer; a color film, a shading block and a bridge electrode which at least covers the side wall of the shading block are arranged in the color conversion layer, a plurality of color films are arranged and are arranged opposite to the light-emitting units one by one, the shading blocks are arranged between adjacent color films, and the bridge electrode covers part of the side wall of the shading block to form a reflective surface; a plurality of touch electrodes are arranged on the surface of the color conversion layer away from the substrate, the touch electrodes are arranged opposite to the shading blocks, and some of the touch electrodes are connected by bridge electrodes. The distance between the light-emitting unit and the color film in the color conversion layer is reduced, which increases the viewing angle of the light emission of the display module, increases the light emission utilization rate of the display module, and reduces the power consumption of the product.

Description

Technical Field

[0001] The present invention relates to the technical field of display equipment, and in particular to a display module, and also to a method for preparing the display module and a display device including the display module. Background Art

[0002] Organic light-emitting diode (OLED) is a must-have display device for current high-end flagship mobile phones, with advantages such as rich colors, light weight, and low power consumption. However, due to the low light efficiency of OLED, it is necessary to improve the existing module structure to achieve improved light efficiency. Summary of the invention

[0003] In view of this, an embodiment of the present invention provides a display module, a method for preparing the display module, and a display device including the display module to solve the technical problem of low light efficiency utilization rate in the display module structure design existing in the prior art.

[0004] In order to achieve the above objective, according to one aspect of an embodiment of the invention, a display module is provided.

[0005] According to a first aspect of an embodiment of the present invention, a display module comprises a substrate, a driving circuit layer, a light emitting layer, a packaging layer, a color conversion layer and a light emitting layer which are stacked in sequence, wherein:

[0006] A plurality of light-emitting units are arranged in an array in the light-emitting layer;

[0007] The color conversion layer is provided with a color film, a light shielding block and a bridge electrode covering at least the side wall of the light shielding block, the color film is provided in plurality and is arranged opposite to the light emitting units one by one, the light shielding block is arranged between adjacent color films, and the bridge electrode covers the side wall of the light shielding block to form a reflective surface;

[0008] A plurality of touch electrodes are arranged on a surface of the color conversion layer on one side away from the substrate. The touch electrodes are arranged opposite to the light shielding block, and some of the touch electrodes are connected through the bridge electrode.

[0009] In the display module provided in the embodiment of the present application, a surface of the color film on one side away from the substrate is bonded to the light emitting layer, and the refractive index of the light emitting layer is greater than the refractive index of the color film.

[0010] In the display module provided in the embodiment of the present application, the interface between the color film and the light output layer includes a plane parallel to the substrate.

[0011] In the display module provided in the embodiment of the present application, the interface between the color film and the light emitting layer includes a curved surface convex in a direction away from the substrate.

[0012] In the display module provided in the embodiment of the present application, the reflective surface is a plane facing the light emitting layer.

[0013] In the display module provided in the embodiment of the present application, the reflective surface is a curved surface facing the light emitting layer.

[0014] In the display module provided in the embodiment of the present application, the reflective surface is a plane perpendicular to the substrate.

[0015] In the display module provided in the embodiment of the present application, the bridge electrode at least covers the side wall and the top of the light shielding block, and the cross-sectional shape formed by the portion of the bridge electrode covering the light shielding block is an arc, a trapezoid or a rectangle.

[0016] In the display module provided in the embodiment of the present application, the light emitting layer includes a first light emitting layer and a second light emitting layer, the first light emitting layer covers the surface of the color film on the side away from the substrate, and the second light emitting layer covers the side of the first light emitting layer away from the substrate, and the refractive index of the color film, the refractive index of the first light emitting layer, and the refractive index of the second light emitting layer increase successively.

[0017] In the display module provided in the embodiment of the present application, the interface between the first light output layer and the second light output layer includes a plane parallel to the substrate.

[0018] In the display module provided in the embodiment of the present application, the interface between the first light output layer and the second light output layer includes a curved surface convex in a direction away from the substrate.

[0019] In order to achieve the above objective, according to a second aspect of an embodiment of the present invention, a display device is further provided. The display device includes the display module provided by the first aspect of the embodiment of the present invention.

[0020] In order to achieve the above-mentioned purpose, according to the third aspect of the embodiment of the invention, a method for preparing a display module is also provided, and the method is used to prepare the display module provided by the first aspect of the embodiment of the invention. The method comprises the following steps:

[0021] A driving circuit layer, a light-emitting layer and a packaging layer are sequentially manufactured on the substrate;

[0022] Preparing the light shielding block, the bridge electrode and the color film on the encapsulation layer to form the color conversion layer;

[0023] A touch electrode is formed on a surface of the color conversion layer away from the substrate and covers the light emitting layer.

[0024] In the display module and display device provided by the embodiment of the present invention, the touch electrode is arranged on the side of the color conversion layer away from the substrate, and the bridge electrode is integrated in the color conversion layer. On the one hand, the insulating layer, the bridge electrode layer and the first flat layer are omitted between the light-emitting layer and the color conversion layer, so that the distance between the light-emitting unit in the light-emitting layer and the color film in the color conversion layer is reduced, which is equivalent to increasing the viewing angle of the light emitted by the display module, and the light emitted by the light-emitting unit can be emitted more from the color film, reducing the proportion of light emitted to the shading block; on the other hand, the bridge electrode is integrated in the color conversion layer, and the bridge electrode covers the side wall of the shading block, and the part of the bridge electrode covering the side wall of the shading block is formed with a reflective surface, so that the light emitted by the light-emitting unit to the side wall of the shading block can be emitted to the color film through the reflective surface and finally utilized, thereby avoiding this part of the relationship from being absorbed by the shading block. Through the above two aspects, the light output utilization rate of the display module of the embodiment of the present application can be increased, and the power consumption of the product can be reduced. In addition, by adopting the display module in the above embodiment, it is relatively easy to produce in the preparation process. Figure 1 The preparation process of the display module can save two mask processes, thereby reducing yield loss and saving costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The drawings constituting a part of this application are used to provide a further understanding of this application, so that other features, purposes and advantages of this application become more obvious. The schematic embodiment drawings and their descriptions of this application are used to explain this application and do not constitute an improper limitation on this application. In the drawings:

[0026] Figure 1 It is a cross-sectional view of a display module in the related art;

[0027] Figure 2 A cross-sectional view of a display module provided by an embodiment of the present invention Figure 1 ;

[0028] Figure 3 A cross-sectional view of a display module provided by an embodiment of the present invention Figure 2 ;

[0029] Figure 4 A cross-sectional view of a display module provided by an embodiment of the present invention Figure 3 ;

[0030] Figure 5 for Figure 2 The optical path schematic diagram of the display module is shown;

[0031] Figure 6 A cross-sectional view of a display module provided by an embodiment of the present invention Figure 4 ;

[0032] Figure 7A cross-sectional view of a display module provided by an embodiment of the present invention Figure 5 ;

[0033] Figure 8 A cross-sectional view of a display module provided by an embodiment of the present invention Figure 6 ;

[0034] Fig. 9 A cross-sectional view of a display module provided by an embodiment of the present invention Figure 7 ;

[0035] Fig.10 A cross-sectional view of a display module provided by an embodiment of the present invention Figure 8 ;

[0036] Fig.11 A cross-sectional view of a display module provided by an embodiment of the present invention Figure 9 ;

[0037] Fig.12 for Fig. 9 The optical path schematic diagram of the display module is shown;

[0038] Fig.13 A cross-sectional view of a display module provided by an embodiment of the present invention Figure 10 ;

[0039] Fig.14 A cross-sectional view of a display module provided by an embodiment of the present invention Figure 10 one;

[0040] Fig.15 A cross-sectional view of a display module provided by an embodiment of the present invention Figure 10 two;

[0041] Fig.16 A cross-sectional view of a display module provided by an embodiment of the present invention Figure 10 three;

[0042] Fig.17 A cross-sectional view of a display module provided by an embodiment of the present invention Figure 10 4; and

[0043] Fig.18 A cross-sectional view of a display module provided by an embodiment of the present invention Figure 10 five.

[0044] In the figure:

[0045] 1. Substrate; 2. Driving circuit layer; 3. Light-emitting layer; 4. Packaging layer; 5. Insulating layer; 6. Bridge electrode layer; 7. First flat layer; 8. Color conversion layer; 9. Second flat layer; 10. Light-emitting unit; 11. Color filter; 12. Shading block; 13. First touch electrode; 14. Second touch electrode; 15. Bridge electrode; 16. Light-emitting layer; 1601. First light-emitting layer; 1602. Second light-emitting layer; 17. Reflective surface; 18. Via hole. DETAILED DESCRIPTION

[0046] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present application.

[0047] It should be noted that the terms "including" and "having" and any variations thereof in the specification and claims of the present application and the above-mentioned drawings are intended to cover non-exclusive inclusions. For example, a system, product or device comprising a series of units is not necessarily limited to those units explicitly listed, but may include units that are not explicitly listed or inherent to these products or devices.

[0048] In this application, the directions or positional relationships indicated by the terms "upper", "lower", "inner", "middle", "outer", etc. are based on the directions or positional relationships shown in the drawings. These terms are mainly used to better describe the present application and its embodiments, and are not used to limit the indicated devices, elements or components to have a specific direction, or to be constructed and operated in a specific direction.

[0049] In addition, some of the above terms may be used to express other meanings in addition to indicating orientation or positional relationship. For example, the term "on" may also be used to express a certain dependency or connection relationship in some cases. For those of ordinary skill in the art, the specific meanings of these terms in this application can be understood according to specific circumstances.

[0050] In addition, the terms "disposed", "connected", and "fixed" should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection, or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, elements, or components. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0051] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application may be combined with each other.

[0052] Figure 1 It is a cross-sectional schematic diagram of the structure of an OLED display module in the related art, which includes a substrate 1, a driving circuit layer 2, a light-emitting layer 3, an encapsulation layer 4, an insulating layer 5, a bridge electrode layer 6, a first flat layer 7, a color conversion layer 8, and a second flat layer 9 which are stacked in sequence. As shown in the figure, a plurality of light-emitting units 10 are arranged in an array in the light-emitting layer 3, a color filter 11 and a light shielding block 12 are arranged in the color conversion layer 8, a plurality of color filters 11 are arranged and are arranged one by one opposite to the light-emitting units 10, and the light shielding block 12 is arranged between adjacent color filters 11, touch electrodes are distributed in the first flat layer 7, and the touch electrodes are arranged opposite to the light shielding block 12, and the touch electrodes include a first touch electrode 13 and a second touch electrode 14, and bridge electrodes 15 are distributed in the bridge electrode layer 6, and the first touch electrodes 13 are directly connected to each other in the first flat layer 7, and the second touch electrodes 14 are connected to each other through the bridge electrode 15 in the bridge electrode layer 6.

[0053] In the display module provided in the embodiment of the present application, a touch structure is directly formed on the packaging structure without the need for an additional touch screen. The display structure and the touch structure can be integrated together, and the display module has the advantages of being light, thin, and foldable, and can meet product requirements such as flexible folding and narrow bezels.

[0054] However, in Figure 1 In the display module shown in the figure, since a film layer related to the touch structure is arranged between the color conversion layer 8 and the display structure, the distance between the light-emitting unit 10 in the light-emitting layer 3 and the color film 11 in the color conversion layer 8 is increased, which is equivalent to reducing the viewing angle (L-Decaly) of the light-emitting of the display module. A large amount of light emitted by the light-emitting unit 10 is blocked and absorbed by the bottom and side surfaces of the shading block 12, thereby resulting in a reduction in the light output utilization rate. In order to obtain the required light output effect, the current of the driving circuit has to be increased, which will increase the power consumption.

[0055] Based on this, Figure 2-4As shown, an embodiment of the present application provides a display module, which includes a substrate 1, a driving circuit layer 2, a light-emitting layer 3, an encapsulation layer 4, a color conversion layer 8 and a light-emitting layer 16 which are stacked in sequence, wherein the light-emitting layer 3 has a plurality of light-emitting units 10 arranged in an array; the color conversion layer 8 is provided with a color filter 11, a shading block 12 and a bridge electrode 15, the bridge electrode 15 at least covers the side wall of the shading block 12, a plurality of color filters 11 are provided and are arranged opposite to the light-emitting units 10 one by one, the shading blocks 12 are arranged between adjacent color filters 11, and a portion of the side wall of the shading block 12 covered by the bridge electrode 15 is formed with a reflective surface 17; a plurality of touch electrodes are provided on a surface of the color conversion layer 8 away from the substrate 1, the touch electrodes are arranged opposite to the shading block 12, and some of the touch electrodes are connected through the bridge electrode 15.

[0056] A number of light-emitting units 10 arranged in an array in the light-emitting layer 3 emit upward, and are emitted after completing color conversion through the color film 11. The touch electrodes distributed in the light-emitting layer 16 include a first touch electrode 13 and a second touch electrode 14. The touch electrodes are arranged on the side of the color conversion layer 8 facing away from the substrate 1, and a bridge electrode 15 is designed in the color conversion layer 8. The first touch electrodes 13 are connected to each other in the light-emitting layer 16. Since the arrangement of the first touch electrodes 13 and the arrangement of the second touch electrodes 14 are intertwined in the light-emitting layer 16, after the first touch electrodes 13 are connected to each other in the light-emitting layer 16, the second touch electrodes 14 need to bypass the first touch electrodes 13 to complete the connection. In this embodiment, the second touch electrodes 14 are connected to each other through the bridge electrode 15 in the color conversion layer 8.

[0057] In the above embodiment, the touch electrode is arranged on the side of the color conversion layer 8 facing away from the substrate 1, and the bridge electrode 15 is integrated into the color conversion layer 8. Figure 1 The film layer related to the touch structure arranged between the color conversion layer 8 and the display structure is designed on the light-emitting side of the color conversion layer 8, so that the above embodiment of the present application is Figure 1For the display module, it has obvious technical effects. On the one hand, the insulating layer 5, the bridge electrode layer 6 and the first flat layer 7 are omitted between the light-emitting layer 3 and the color conversion layer 8, so that the distance between the light-emitting unit 10 in the light-emitting layer 3 and the color film 11 in the color conversion layer 8 is reduced, which is equivalent to increasing the viewing angle (L-Decaly) of the display module. The light emitted by the light-emitting unit 10 can be emitted more from the color film 11, reducing the proportion of light emitted to the shading block 12; on the other hand, the bridge electrode 15 is integrated in the color conversion layer 8, and the bridge electrode 15 covers the side wall of the shading block 12. The part of the bridge electrode 15 covering the side wall of the shading block 12 is formed with a reflective surface 17, so that the light emitted by the light-emitting unit 10 to the side wall of the shading block 12 can be emitted to the color film 11 through the reflective surface 17 and finally utilized, thereby avoiding this part of the relationship from being absorbed by the shading block 12. Through the above two aspects, the light output utilization rate of the display module of the embodiment of the present application can be increased, and the power consumption of the product can be reduced. In addition, by adopting the display module in the above embodiment, the manufacturing process is relatively simple. Figure 1 The preparation process of the display module can save two mask processes, thereby reducing yield loss and saving costs.

[0058] In some embodiments of the present application, Figure 2 and 3 As shown, the reflective surface 17 in the display module is arranged toward the light emitting layer 16, so that all light incident on the reflective surface 17 can be reflected toward the direction where the color film 11 is located, and the reflective surface 17 is toward the light emitting layer 16, so that the light emitting surface can form a positive slope, that is, the outer contour of the bridge electrode 15 on both sides of a shading block 12 is designed to be narrow on the top (the side originally away from the substrate 1) and wide on the bottom (the side close to the substrate 1). In this way, when the color film 11 is formed on the reflective surface 17, it can be made easier to achieve full contact between the reflective surface 17 and the color film 11 in terms of process, thereby avoiding film layer peeling, and also avoiding the formation of a hollow structure between the color film 11 and the reflective surface 17, thereby avoiding unnecessary refraction loss in the light path and enhancing the optical performance.

[0059] In some embodiments of the present application, the reflective surface 17 is a plane or a curved surface facing the light emitting layer 16, and the cross-sectional shape of the reflective surface 17 on the bridge electrodes 15 on both sides of a light shielding block 12 is an eight-shaped shape. It should be noted that the bridge electrode 15 can cover the top of the light shielding block 12 (the side away from the substrate 1) in addition to covering the side wall of the light shielding block 12. Such a design, on the one hand, can be easily implemented in terms of process, and only needs to deposit a whole layer of material on the module of the light shielding block 12 and then pattern it to form the bridge electrode 15; on the other hand, the part of the bridge electrode 15 covering the top surface of the light shielding block 12 can be conveniently connected to the touch electrode above, and the second touch electrode 14 is electrically connected across the layer through the via 18 with the bridge electrode 15. The distance between the part of the bridge electrode 15 covering the top of the light shielding block 12 and the second touch electrode 14 is the shortest. Making the via 18 here can make the via 18 shortest, and the conductive material filled therein is the least, which has certain advantages in terms of process and cost.

[0060] Specifically, in some embodiments, Figure 2 As shown, the bridge electrode 15 covers the side wall and the top of the light shielding block 12 at the same time, the reflective surface 17 is a curved surface facing the light emitting layer 16, and the portion of the bridge electrode 15 at the top of the light shielding block 12 is also a curved surface. At this time, the cross-sectional shape formed by the outer contour of the portion of the bridge electrode 15 covering the light shielding block 12 is a continuous curve, for example, it can be an arc shape. When the display module has large pixels, the density of the light shielding block 12 is high, and other bridge electrodes 15 are difficult to complete in terms of technology. The bridge electrode 15 with a curved shape such as an arc cross-section can be easily realized through existing processes to meet the design requirements.

[0061] Specifically, in other embodiments, Figure 3 As shown, the bridge electrode 15 covers the side wall and the top of the light shielding block 12 at the same time, the reflective surface 17 is a plane facing the light emitting layer 16, and the portion of the bridge electrode 15 on the top of the light shielding block 12 is arranged parallel to the substrate 1. At this time, the cross-sectional shape formed by the outer contour of the portion of the bridge electrode 15 covering the light shielding block 12 is a trapezoid (the trapezoid does not include the bottom). The bridge electrode 15 with a trapezoidal cross-section can be completed in the display module according to the existing process to meet the design requirements when the display module pixel requirements are not high, and those skilled in the art can select it according to needs.

[0062] In some embodiments of the present application, Figure 4As shown, the reflective surface 17 can also be a plane perpendicular to the substrate 1. The vertically arranged reflective surface 17 can prevent the reflected light from emitting out of the display module in a direction perpendicular to the substrate 1, and can prevent the display module from leaking light in some usage conditions. In this embodiment, similarly, in addition to covering the side walls of the light shielding block 12, the bridge electrode 15 can also cover the top of the light shielding block 12 (the side away from the substrate 1), thereby facilitating the preparation of the bridge electrode 15 and facilitating the connection between the second touch electrode 14 and the bridge electrode 15. The portion of the bridge electrode 15 at the top of the light shielding block 12 is arranged parallel to the substrate 1, and at this time, the cross-sectional shape formed by the outer contour of the portion of the bridge electrode 15 covering the light shielding block 12 is a rectangle (the rectangle does not include the bottom edge).

[0063] It should be noted that the shapes of the light shielding block 12 and the bridge electrode 15 covering it can be the same or different, as long as the bridge electrode 15 can cover the side of the light shielding block 12 to form the reflective surface 17. However, from a process perspective, the shapes of the light shielding block 12 and the bridge electrode 15 covering it are usually kept consistent, so that the bridge electrode 15 is grown on the surface of the light shielding block 12 through a process such as deposition or sputtering, and can form a conformal design with the light shielding block 12. For example, the cross-sectional shape of the light shielding block 12 is an arc, and the bridge electrode 15 grown thereon is also an arc. The cross-sectional shape of the light shielding block 12 is a trapezoid or a rectangle, so that the outline of the bridge electrode 15 grown thereon is also not a trapezoid or a rectangle.

[0064] In the display module provided in the embodiment of the present application, the surface of the color filter 11 away from the substrate 1 is bonded to the light emitting layer 16, and the refractive index of the light emitting layer 16 is greater than the refractive index of the color filter 11. Figure 5 As shown, when light is emitted from the color film 11 to the light emitting layer 16, light refraction occurs, and the incident angle and the refraction angle conform to the law of refraction, that is, n1sinβ=n0sinβ′, where n0 and n1 are the refractive indexes of the light emitting layer 16 and the color film 11, respectively, β is the incident angle, and β′ is the refraction angle. As the incident angle β changes, the refraction angle β′ changes accordingly, because the refractive index n0 of the light emitting layer 16 is greater than the refractive index n1 of the color film 11. Therefore, the incident angle β will be greater than the refraction angle β′, that is, the outgoing light is deflected in the direction close to the normal relative to the incident light, so that the outgoing light presents a gathering effect, further improving the light utilization effect.

[0065] Optionally, in the above embodiment, if Figure 2-4 As shown, the interface between the color filter 11 and the light emitting layer 16 includes a plane parallel to the substrate 1. At this time, the normal line on the plane interface between the color filter 11 and the light emitting layer 16 is always perpendicular to the substrate 1.

[0066] Optionally, in the above embodiment, if Figure 6-8As shown, the interface between the color filter 11 and the light emitting layer 16 includes a curved surface convex in a direction away from the substrate 1. At this time, the normal line on the curved interface between the color filter 11 and the light emitting layer 16 is always perpendicular to the tangent line at the incident point. Compared with the plane interface, the curved interface can further enhance the gathering effect of the emitted light.

[0067] In the above display module provided in the embodiment of the present application, if Figure 9-18 As shown, the light emitting layer 16 includes a first light emitting layer 1601 and a second light emitting layer 1602, the first light emitting layer 1601 covers the surface of the side of the color film 11 away from the substrate 1, and the second light emitting layer 1602 covers the side of the first light emitting layer 1601 away from the substrate 1, and the refractive index of the color film 11, the refractive index of the first light emitting layer 1601, and the refractive index of the second light emitting layer 1602 increase successively.

[0068] The surface of the color film 11 away from the substrate 1 is bonded to the first light emitting layer 1601 to form a first interface, and the surface of the first light emitting layer 1601 away from the substrate 1 is bonded to the second light emitting layer 1602 to form a second interface. Fig.12 As shown, when light is emitted from the color film 11 to the first light emitting layer 1601, light refraction occurs, and the incident angle and refraction angle at the first interface conform to the law of refraction, that is, n1sinβ=n 01 sinα, where n 01 , n1 are the refractive indices of the first light emitting layer 1601 and the color film 11, β is the incident angle at the first interface, and α is the refractive angle at the first interface. 01 is greater than the refractive index n1 of the color film 11, so the incident angle β at the first interface is greater than the refractive angle α at the first interface, that is, the outgoing light at the first interface is deflected toward the direction close to the normal relative to the incident light at the first interface, so that the light at the first interface presents a gathering effect; similarly, when the light is emitted from the first light emitting layer 1601 to the second light emitting layer 1602, the light is refracted again, and the incident angle and refraction angle at the second interface conform to the law of refraction, that is, n 01 sinα′=n 02 sinγ, where n 01 、n 02 are the refractive index of the first light extraction layer 1601 and the refractive index of the second light extraction layer 1602, α′ is the incident angle at the second interface, and γ is the refractive angle at the second interface. 02 Greater than the refractive index n of the first light emitting layer 1601 01Therefore, the incident angle α′ at the second interface will be greater than the refraction angle γ at the second interface, that is, the outgoing light at the second interface is deflected toward the direction close to the normal relative to the incident light at the second interface, so that the light at the second interface further presents a gathering effect. By designing the light emitting layer 16 as a first light emitting layer 1601 and a second light emitting layer 1602, the light directly emitted by the light emitting unit 10 into the color film 11 and the light reflected by the bridge electrode 15 into the color film 11 will be refracted twice in succession when entering the first light emitting layer 1601 and the light emitting layer 16, resulting in two gathering effects, which greatly improves the light emitting effect.

[0069] Optionally, in the above embodiment, if Figure 9-11 The second interface between the first light extraction layer 1601 and the second light extraction layer 1602 includes a plane parallel to the substrate 1. At this time, the normal line on the second interface between the first light extraction layer 1601 and the second light extraction layer 1602 is always perpendicular to the substrate 1. Figure 9-11 The first interface between the color film 11 and the first light emitting layer 1601 is also planar. At this time, the normals on the two interfaces are parallel, and the refraction angle α of the same light at the first interface is equal to the incident angle α′ at the second interface.

[0070] Optionally, in the above embodiment, if Figure 13-18 As shown, the second interface between the first light emitting layer 1601 and the second light emitting layer 1602 includes a curved surface parallel to the substrate 1. At this time, the normal line on the curved second interface between the first light emitting layer 1601 and the second light emitting layer 1602 is always perpendicular to the tangent line at the incident point. At this time, whether the first interface between the color filter 11 and the first light emitting layer 1601 is a plane (such as Figure 13-15 ) or a curved surface (as shown Figure 16-18 As shown), as long as the normals on the two interfaces are not parallel, the refraction angle α of the same light at the first interface is not equal to the incident angle α′ at the second interface. Only when the normals on the two interfaces are parallel, the refraction angle α of the same light at the first interface is equal to the incident angle α′ at the second interface. Compared with the second interface in the form of a plane, the second interface in the form of a curved surface can further enhance the gathering effect of the outgoing light. It should be noted that the first interface between the first light emitting layer 1601 and the color film 11 can be in the form of a curved surface, or in the form of a plurality of curved surfaces arranged continuously or in the form of a plurality of curved surfaces arranged at intervals; the second interface between the first light emitting layer 1601 and the second light emitting layer 1602 can be in the form of a curved surface, or in the form of a plurality of curved surfaces arranged continuously or in the form of a plurality of curved surfaces arranged at intervals.

[0071] For example, the following is a method provided by an embodiment of the present invention. Figure 2-18 The method for preparing the display module shown may specifically be:

[0072] Step S100 , manufacturing a driving circuit layer 2 , a light emitting layer 3 and a packaging layer 4 in sequence on a substrate 1 .

[0073] In this step, the substrate 1 may be a hard substrate 1 or a flexible substrate 1. The material of the hard substrate 1 includes but is not limited to glass, and the material of the flexible substrate 1 includes but is not limited to polyimide (PI). For example, the substrate 1 provided in the embodiment of the present application may be a PI flexible film layer formed by deposition or coating on a rigid glass. After the display module is prepared, the display module of the flexible substrate 1 may be obtained by peeling off the rigid glass.

[0074] The driving circuit layer 2 in the present application is provided with a pixel driving circuit, which may include a number of transistor structures. The entire surface of the substrate 1 may be deposited with a buffer layer first and then the driving circuit layer 2 may be formed. Of course, the buffer layer may not be included or may include multiple buffer layers depending on the situation. The driving circuit layer 2 is provided with an active layer and a gate insulating layer 5, and the gate insulating layer 5 covers the active layer, and the gate insulating layer 5 has a gate on the surface away from the substrate 1; the gate insulating layer 5 has an interlayer dielectric layer covering the gate on the surface away from the substrate 1, and the interlayer dielectric layer has a source and a drain on the surface away from the substrate 1, and the source and the drain are electrically connected to the active layer in a cross-layer manner.

[0075] The light-emitting unit 10 in the light-emitting layer 3 is preferably an OLED light-emitting device. There is no special requirement for the specific structure of the light-emitting layer 3 where the OLED light-emitting device is located, and those skilled in the art can flexibly select it according to actual conditions. For example, the light-emitting layer 3 may include a pixel defining layer having a plurality of openings, an anode arranged in the opening (the anode is electrically connected to the drain through a cross-layer), a HTL (hole transport layer), a light-emitting material, an ETL (electron transport layer) and a cathode arranged on the anode in sequence.

[0076] There are no special requirements for the specific structure of the encapsulation layer 4, and those skilled in the art can flexibly select various encapsulation film layers in the relevant technology according to actual conditions. For example, an inorganic film layer can be first deposited on the aforementioned light-emitting layer 3, and then a second organic film layer can be formed by inkjet printing, and finally a second inorganic film layer can be deposited to complete the encapsulation layer 4 including an inorganic / organic / inorganic three-layer structure. Of course, the structure of the encapsulation layer 4 is not limited to this, and those skilled in the art can select a single-layer or more-layer film structure as the encapsulation layer 4 as needed.

[0077] Step S200 , preparing the light shielding block 12 , the bridge electrode 15 and the color filter 11 on the encapsulation layer 4 to form the color conversion layer 8 .

[0078] On the basis of the formed encapsulation layer 4, a light shielding layer film is coated, and a light shielding block 12 pattern is formed by a photolithography process. Specifically, the light shielding block 12 is preferably a black matrix (BM). In the orthographic projection formed on the surface of the substrate 1, the orthographic projection of the light shielding block 12 is located outside the pixel opening area in the light emitting layer 3 to avoid blocking light.

[0079] After the light shielding block 12 is fabricated, a metal film is deposited, and the metal film is patterned by a patterning process to form a covering bridge electrode 15. The bridge electrode 15 can be made of metal materials, such as any one or more of silver (Ag), copper (Cu), aluminum (Al) and molybdenum (Mo), or alloy materials of the above metals, such as aluminum-neodymium alloy (AlNd) or molybdenum-niobium alloy (MoNb).

[0080] After the bridge electrode 15 is made, the color filter 11 is made. The types of the multiple color filters 11 may include a first color filter 11, a second color filter 11 and a third color filter 11, for example, the first color filter 11 is a red color filter 11, the second color filter 11 is a green color filter 11, and the third color filter 11 is a blue color filter 11; of course, the types of the multiple color filters 11 may also include a fourth color filter 11, for example, the fourth color filter 11 is a yellow color filter 11. This embodiment takes the example that the types of the multiple color filters 11 may include the first color filter 11, the second color filter 11 and the third color filter 11 to illustrate its preparation process. On the structure forming the aforementioned pattern, a first filter film is coated, and a pattern of the first color filter 11 is formed by a photolithography process; a second filter film is coated, and a pattern of the second color filter 11 is formed by a photolithography process; a third filter film is coated, and a pattern of the third color filter 11 is formed by a photolithography process. The first color filter 11 , the second color filter 11 , and the third color filter 11 are filled in the spaces between the light shielding blocks 12 and cover the bridge electrode 15 and the light shielding blocks 12 .

[0081] Step S300 : forming a touch electrode on a surface of the color conversion layer 8 away from the substrate 1 and covering the light emitting layer 16 .

[0082] On the basis of forming the above structure, a plurality of vias 18 are formed on the color film 11 to expose the bridge electrode 15, and the vias 18 are filled with conductive material, a metal film layer is formed on the surface of the color conversion layer 8, and the patterns of the first touch electrodes 13 and the second touch electrodes 14 are formed by a patterning process, the first touch electrodes 13 are directly connected within the same layer by the patterning process, the second touch electrodes 14 are connected to the bridge electrode 15 through the conductive material in the vias 18, and the second touch electrodes 14 are electrically connected to each other through the vias 18. The first touch electrodes 13 and the second touch electrodes 14 can be made of metal materials, such as any one or more of silver (Ag), copper (Cu), aluminum (Al) and molybdenum (Mo), or alloy materials of the above metals, such as aluminum-neodymium alloy (AlNd) or molybdenum-niobium alloy (MoNb).

[0083] On the basis of the aforementioned structure with the touch electrode, a light emitting layer 16 thin film is coated and cured to form a shape, and the light emitting layer 16 has both light emitting and planarization functions. The material of the light emitting layer 16 may include inorganic or organic substances, such as silicon nitride SiNx or silicon oxide SiOx, etc., and the organic substance may be various organic resins, such as unsaturated polyester or acrylic resin.

[0084] The above is an exemplary description and illustration of the display module in an embodiment of the present invention. Other structures of the display module and other operations of its preparation method are known to ordinary technicians in the field and will not be described in detail here. Those skilled in the art can refer to the records of the prior art for understanding and application.

[0085] The embodiment of the present invention further provides a display device, which adopts the display module provided by the embodiment of the present invention, that is, the display module in the display device includes a substrate 1, a driving circuit layer 2, a light-emitting layer 3, an encapsulation layer 4, a color conversion layer 8 and a light-emitting layer 16 which are stacked in sequence, wherein the light-emitting layer 3 has a plurality of light-emitting units 10 arranged in an array; the color conversion layer 8 is provided with a color filter 11, a shading block 12 and a bridge electrode 15, the bridge electrode 15 at least covers the side wall of the shading block 12, a plurality of color filters 11 are provided and are arranged opposite to the light-emitting units 10 one by one, the shading blocks 12 are arranged between adjacent color filters 11, and a portion of the side wall of the shading block 12 covered by the bridge electrode 15 is formed with a reflective surface 17; a plurality of touch electrodes are provided on a surface of the color conversion layer 8 away from the substrate 1, the touch electrodes are arranged opposite to the shading block 12, and some of the touch electrodes are connected through the bridge electrode 15.

[0086] The display device provided in the embodiment of the present application may be: a liquid crystal panel, an electronic paper, an organic light emitting diode (OLED) panel, an active matrix organic light emitting diode (AMOLED) panel, a mobile phone, a tablet computer, a television, a display, a laptop computer, a digital photo frame or a navigator, or any other product or component with a display function. Since the display device disclosed in the embodiment of the present application includes the display module provided in the above embodiment, the display device having the display module also has all the above-mentioned technical effects, which will not be described one by one here. The other structures, principles and preparation methods of the display module and the display device are known to those of ordinary skill in the art and will not be described in detail here.

[0087] Some embodiments in this specification are described in a progressive manner. Each embodiment focuses on the differences from other embodiments, and the same or similar parts between the embodiments can be referenced to each other.

[0088] The above is only a specific embodiment of the present invention, so that those skilled in the art can understand or implement the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but should conform to the widest scope consistent with the principles and novel features applied herein.

Claims

1. A display module, characterized in that: It includes a substrate, a driving circuit layer, a light-emitting layer, a packaging layer, a color conversion layer and a light-emitting layer which are stacked in sequence, wherein: A plurality of light-emitting units are arranged in an array in the light-emitting layer; The color conversion layer is provided with a color film, a light shielding block and a bridge electrode covering at least the side wall of the light shielding block, the color film is provided in plurality and is arranged opposite to the light emitting units one by one, the light shielding block is arranged between adjacent color films, and the bridge electrode covers the side wall of the light shielding block to form a reflective surface; A plurality of touch electrodes are arranged on a surface of the color conversion layer on one side away from the substrate. The touch electrodes are arranged opposite to the light shielding block, and some of the touch electrodes are connected through the bridge electrode.

2. The display module according to claim 1, characterized in that: A surface of the color film on one side away from the substrate is bonded to the light emitting layer, and the refractive index of the light emitting layer is greater than the refractive index of the color film.

3. The display module according to claim 2, characterized in that: The interface between the color film and the light emitting layer includes a plane parallel to the substrate.

4. The display module according to claim 2, characterized in that: The interface between the color filter and the light emitting layer includes a curved surface that convexly moves away from the substrate.

5. The display module according to claim 1, characterized in that: The light reflecting surface is a plane facing the light emitting layer; or The light reflecting surface is a curved surface facing the light emitting layer; or The reflective surface is a plane perpendicular to the substrate.

6. The display module according to claim 1, characterized in that: The bridge electrode at least covers the side wall and the top of the light shielding block, and the cross-sectional shape formed by the portion of the bridge electrode covering the light shielding block is an arc, a trapezoid or a rectangle.

7. The display module according to any one of claims 1 to 6, characterized in that: The light emitting layer includes a first light emitting layer and a second light emitting layer, the first light emitting layer covers a surface of the color film on a side away from the substrate, the second light emitting layer covers a side of the first light emitting layer away from the substrate, and the refractive index of the color film, the refractive index of the first light emitting layer and the refractive index of the second light emitting layer increase sequentially.

8. The display module according to claim 7, characterized in that: An interface between the first light extraction layer and the second light extraction layer includes a plane parallel to the substrate.

9. The display module according to claim 7, characterized in that: The interface between the first light extraction layer and the second light extraction layer includes a curved surface convex in a direction away from the substrate.

10. A display device, characterized in that: A display module comprising any one of claims 1-9.

11. A method for preparing a display module, used for preparing the display module according to any one of claims 1 to 9, characterized in that: The following steps are involved: A driving circuit layer, a light-emitting layer and a packaging layer are sequentially manufactured on the substrate; Preparing the light shielding block, the bridge electrode and the color film on the encapsulation layer to form the color conversion layer; A touch electrode is formed on a surface of the color conversion layer away from the substrate and covers the light emitting layer.

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