Display module, manufacturing method and display device

Abstract

The invention discloses a display module, a manufacturing method and a display device.The display module of one embodiment comprises a substrate, a driving circuit layer arranged on the substrate, a color film layer arranged on the driving circuit layer, a scattering layer arranged on the color film layer and a light-emitting device layer arranged on the scattering layer. The light-emitting device layer comprises a first electrode arranged on the side, away from the substrate, of the scattering layer, a light-emitting material layer arranged on the side, away from the substrate, of the first electrode and a second electrode arranged on the side, away from the substrate, of the light-emitting material layer, the first electrode is a transparent electrode, and the second electrode is a transparent electrode. The second electrode is a reflecting electrode; the roughness of the second surface, close to one side of the light-emitting device layer, of the scattering layer is larger than that of the first surface, close to one side of the color film layer, of the scattering layer, and the scattering layer is used for scattering light emitted by the light-emitting device layer towards the substrate.

Description

Technical Field

[0001] The present invention relates to the field of display technology, and more specifically, to a display module, a manufacturing method and a display device. Background Art

[0002] Organic light-emitting diode (OLED) display devices have advantages such as response speed, viewing angle, high contrast, and flexibility. Since OLED devices are layered light-emitting devices, the materials of each functional layer have different optical refractive indexes, which will affect the optical performance of OLED devices. Summary of the invention

[0003] An object of the present invention is to provide a display module, a manufacturing method and a display device to solve at least one of the problems existing in the prior art.

[0004] In order to achieve the above object, the present invention adopts the following technical solutions:

[0005] A first aspect of the present invention provides a display module, the display module comprising:

[0006] a substrate, a driving circuit layer disposed on the substrate, a color filter layer disposed on the driving circuit layer, a scattering layer disposed on the color filter layer, and a light emitting device layer disposed on the scattering layer,

[0007] The light emitting device layer comprises a first electrode disposed on a side of the scattering layer away from the substrate, a light emitting material layer disposed on a side of the first electrode away from the substrate, and a second electrode disposed on a side of the light emitting material layer away from the substrate, wherein the first electrode is a transparent electrode and the second electrode is a reflective electrode;

[0008] The roughness of the second surface of the scattering layer close to the light emitting device layer is greater than the roughness of the first surface close to the color filter layer, and is used to scatter the light emitted from the light emitting device layer toward the substrate.

[0009] In an optional embodiment, the second surface includes a tooth-shaped structure, and the tooth-shaped structures at different positions have different vertical heights from a side surface of the substrate.

[0010] The tooth-shaped structure includes a plurality of scattering surfaces arranged in an array, and a protrusion of each scattering surface extends from the substrate toward the light-emitting device layer or from the light-emitting device layer toward the substrate.

[0011] In an optional embodiment, the color filter layer includes a red filter layer, a green filter layer and a blue filter layer, and the toothed structure is at least arranged at a position corresponding to the orthographic projection of the red filter layer, the green filter layer and the blue filter layer on the substrate.

[0012] In an optional embodiment, the surfaces of the first electrode, the light-emitting material layer and the film layer of the second electrode close to the substrate are toothed structures arranged in coordination with the scattering layer, the protruding directions of the surfaces of the first electrode, the light-emitting material layer and the film layer of the second electrode are the same as the protruding directions of the toothed structures on the second surface, and the second surface is in contact with the surface of the first electrode close to the substrate.

[0013] In an optional embodiment, the display module further includes an encapsulation layer, which covers a surface of the second electrode away from the substrate and a surface of a scattering layer between adjacent light-emitting device layers away from the substrate, and a surface of the encapsulation layer close to the substrate is a toothed structure arranged in coordination with the scattering layer, and a protruding direction of the toothed structure of the encapsulation layer is the same as a protruding direction of the toothed structure of the second surface.

[0014] In an optional embodiment, the orthographic projection of the scattering surface on the substrate is a patterned projection, and the shape of the patterned projection includes one or more of a circle, an ellipse, a triangle, a square, a pentagon or a hexagon.

[0015] In an optional embodiment, a protrusion height of each of the scattering surfaces in a direction from the substrate to the color filter layer or in a direction from the color filter layer to the substrate is 0.5-3 um.

[0016] In an optional embodiment, adjacent patterned projections corresponding to a plurality of scattering surfaces at the same color filter layer position have a common projection boundary;

[0017] or

[0018] There are gaps between projection boundaries of adjacent patterned projections of a plurality of scattering surfaces corresponding to the same color filter layer position.

[0019] In an optional embodiment, the display module is a white light organic light emitting diode display module.

[0020] In an optional embodiment, the refractive index of the film layer material of the encapsulation layer is the same as the refractive index of the film layer material of the scattering layer.

[0021] In an optional embodiment, the display module further includes a shielding layer, and the shielding layer is located between the gaps between the orthographic projections of two adjacent filter layers on the substrate in an orthographic projection on the substrate.

[0022] In an optional embodiment, the surface of the shielding layer close to the substrate and the surface of the filter layer close to the substrate are located on the same film layer surface.

[0023] The scattering layer covers a surface of the shielding layer away from the substrate and covers a surface of the filter layer away from the substrate.

[0024] A second aspect of the present invention provides a display device, comprising the display module described in any one of the first aspects of the present invention.

[0025] The third aspect of the present invention provides a method for manufacturing the display module of the first aspect of the present invention, the method comprising:

[0026] forming a driving circuit layer on the substrate;

[0027] forming a color filter layer on the driving circuit layer;

[0028] forming a scattering layer on the color filter layer;

[0029] A light emitting device layer is formed on the scattering layer, wherein the roughness of a second surface of the scattering layer close to the light emitting device layer is greater than the roughness of a first surface close to the color filter layer, so as to scatter light emitted from the light emitting device layer toward the substrate;

[0030] Wherein, forming a light emitting device layer on the scattering layer further comprises:

[0031] forming a first electrode on a side of the scattering layer away from the substrate;

[0032] forming a light emitting material layer on a side of the first electrode away from the substrate; and

[0033] A second electrode is formed on a side of the light-emitting material layer away from the substrate, wherein the first electrode is a transparent electrode and the second electrode is a reflective electrode.

[0034] The beneficial effects of the present invention are as follows:

[0035] In the embodiment of the present invention, a scattering layer is arranged between the color filter layer and the light emitting device layer, and the first surface and the second surface of the scattering layer are arranged to have structures with different roughnesses, so that the roughness of the first surface located above the layer structure is greater than the roughness of the second surface located below the layer structure. Figure 1 As shown in the planar structure, the scattering structure of the embodiment of the present invention can break the total reflection of light in the film layer of the bottom reflection display module, thereby improving the light emission effect and improving the optical performance of the bottom reflection display module. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] The specific implementation modes of the present invention are further described in detail below in conjunction with the accompanying drawings.

[0037] Figure 1A schematic diagram showing the layer structure of a display module of the related art;

[0038] Figure 2 , Figure 3 , Figure 4 , Figure 5 as well as Figure 6 Schematic diagrams showing the layer structures of display modules according to different embodiments of the present invention;

[0039] Figure 7 , Figure 8 as well as Fig. 9 A schematic diagram showing the arrangement of the orthographic projection of the toothed structure of an embodiment of the present invention on a substrate;

[0040] Fig.10 Showing the present invention Figure 2 The process diagram of the display module shown;

[0041] Fig.11 Showing the present invention Figure 3 The schematic diagram of the manufacturing process of the display module is shown. DETAILED DESCRIPTION

[0042] In order to explain the present invention more clearly, the present invention is further described below in conjunction with embodiments and drawings. Similar components in the drawings are represented by the same reference numerals. It should be understood by those skilled in the art that the content specifically described below is illustrative rather than restrictive, and the protection scope of the present invention should not be limited thereto.

[0043] Since OLED (organic light emitting diode) devices are layered light emitting devices, the materials of each functional layer have different optical refractive indices, which leads to mismatch of optical coefficients at the interface of each film layer, causing reflection and refraction of light in the OLED device. When the incident angle of the light is too large and the refractive index of the incident medium is smaller than the medium in which the light is originally located, total reflection will occur, making it impossible for the light to be emitted to the outside of the device in each functional layer, resulting in the optical performance of the OLED device being affected.

[0044] Based on the above discussion, in practical applications, the optical performance of bottom-emitting OLED devices is more affected by the refractive index of the film layer, such as Figure 1 The schematic diagram of the structure of the bottom emission OLED device of the related art is shown as follows: Figure 1 As shown, the structure of the bottom-emitting OLED device is, from top to bottom, an opaque metal cathode 153, an organic functional layer 152, and a transparent anode 151. The light emitted from the organic functional layer 152 is reflected from the opaque metal cathode 153 and emitted from the transparent anode 151. Therefore, based on the light emission principle of the bottom-emitting OLED device, the light cannot be emitted to the outside of the device in each functional layer, resulting in the optical performance of the bottom-emitting OLED device being affected.

[0045] In view of this, an embodiment of the present invention provides a display module, a manufacturing method and a display device to solve the above problems.

[0046] The first embodiment of the present invention provides a display module, such as Figure 2-Figure 5 As shown, the display module includes:

[0047] A substrate 11, a driving circuit layer 12 disposed on the substrate 11, a color filter layer 13 disposed on the driving circuit layer 12, a scattering layer 14 disposed on the color filter layer 13, and a light emitting device layer 15 disposed on the scattering layer 14,

[0048] The light-emitting device layer 15 includes a first electrode 151 disposed on a side of the scattering layer 14 away from the substrate 11, a light-emitting material layer 152 disposed on a side of the first electrode 151 away from the substrate 11, and a second electrode 153 disposed on a side of the light-emitting material layer 152 away from the substrate 11, wherein the first electrode 151 is a transparent electrode, and the second electrode 153 is a reflective electrode. Exemplarily, the first electrode 151 is a transparent cathode, and the second electrode 153 is an opaque reflective electrode, so as to realize the bottom emission of light from the light-emitting device layer 15 to the substrate 11 side;

[0049] The roughness of the second surface of the scattering layer 14 close to the light emitting device layer 15 is greater than the roughness of the first surface close to the color filter layer 13 , and is used to scatter the light emitted from the light emitting device layer 15 toward the substrate 11 .

[0050] In the embodiment of the present invention, a scattering layer 14 is provided between the color filter layer 13 and the light emitting device layer 15, and the first surface and the second surface of the scattering layer 14 are provided with structures with different roughnesses, so that the roughness of the first surface located above the layer structure is greater than the roughness of the second surface located below the layer structure. Figure 1 As shown in the planar structure, the scattering structure of the embodiment of the present invention can break the total reflection of light in the film layer of the bottom reflection display module, thereby improving the light emission effect and improving the optical performance of the bottom reflection display module.

[0051] The structure of the scattering layer 14 of the embodiment of the present invention is now exemplarily described: In an optional embodiment, as Figure 2 , Figure 3 as well as Figure 4 As shown, the second surface includes a tooth-shaped structure 141 , and the tooth-shaped structures 141 at different positions have different vertical heights from a side surface of the substrate 11 , thereby forming a rough second surface to improve the light reflection effect.

[0052] In this embodiment, the toothed structure 141 includes a plurality of scattering surfaces arranged in an array, and the protrusions of each scattering surface extend from the substrate 11 to the light-emitting device layer 15 or from the light-emitting device layer 15 to the substrate 11. That is, the scattering surface of this embodiment can be set to Figure 2 and Figure 3 The array structure shown as being recessed downward may also be configured as follows Figure 4 The array structure protruding upward as shown, that is, the embodiment of the present invention forms a second surface with roughness in the embodiment of the present invention by structurally designing the second surface, so that the roughness of the second surface is greater than the roughness of the first surface, thereby improving the light reflectivity of each film layer in the display module, and achieving the effect of improving the reflection of the light of the light emitting device layer 15 to the side of the substrate 11.

[0053] In an optional embodiment, the scattering surface of the tooth-shaped structure 141 of the embodiment of the present invention is an arc-shaped or bent structure, for example Figure 2-Figure 4 As shown, the schematic diagram of the layer structure interface of the scattering surface is an arc-shaped structure, and a plurality of scattering surfaces of the arc-shaped structure are arranged in an array to form a lens array capable of scattering light. The structure of the scattering surface of the embodiment of the present invention is not limited to Figure 2-Figure 4 The arc-shaped surface shown in the cross-sectional schematic diagram of the scattering surface of the embodiment of the present invention can also be a triangle, a rectangle, or a structure such as a gear. The vertical height of the surface at any position in the scattering surface from the surface of the substrate 11 is different as a design criterion to form a second surface with roughness, thereby achieving the purpose of improving the light emitting effect of the display module.

[0054] In an alternative embodiment, for example Figure 2-Figure 5 As shown, the color filter layer 13 includes a red filter layer 131 , a green filter layer 132 and a blue filter layer, and the toothed structure 141 is at least arranged at a position corresponding to the positive projection of the red filter layer 131 , the green filter layer 132 and the blue filter layer 133 on the substrate 11 .

[0055] In this embodiment, the distribution position of the tooth-shaped structures 141 on the second surface of the scattering layer 14 is designed, such as Figure 2 As shown, the tooth-shaped structure 141 not only overlaps with the red filter layer 131, the green filter layer 132 and the blue filter layer 133 in the orthographic projection of the substrate 11, but is also arranged in the intervals between adjacent filter layers of different colors. That is to say, the tooth-shaped structure 141 of the embodiment of the present invention can be arranged in a whole layer. The process manufacturing efficiency of this arrangement is relatively high. On the basis of improving the light output effect, it ensures the convenience and speed of the process.

[0056] In another embodiment, Figure 3As shown, the tooth-shaped structure 141 is only arranged at the position corresponding to the orthographic projection of the red filter layer 131, the green filter layer 132 and the blue filter layer 133 of the substrate 11, and is not arranged in the intervals between adjacent filter layers of different colors. That is to say, the tooth-shaped structure 141 of the embodiment of the present invention is arranged in an array corresponding to the position of the filter layer. Through this arrangement, the tooth-shaped structure 141 of the scattering layer 14 only scatters the light at the position of the filter layer, and does not scatter the light between adjacent filter layers (1521-1523). Through this arrangement, the light crosstalk between adjacent different colors can be avoided, and the light crosstalk is reduced on the basis of improving the light output effect, thereby improving the display effect.

[0057] Those skilled in the art can design according to actual application and can choose Figure 2 The toothed structure 141 shown in the figure is arranged in a whole layer, and it is also possible to select Figure 3 The tooth-shaped structures 141 are arranged in an array and will not be described in detail here.

[0058] In an optional embodiment, if Figure 2-Figure 4 As shown, the luminescent material layer 152 includes a red luminescent layer 1521 arranged at a position corresponding to the red filter layer 131, a green luminescent layer 1522 arranged at a position corresponding to the green filter layer 132, and a blue luminescent layer 1523 arranged at a position corresponding to the blue filter layer 133. Based on this arrangement, the color display of the display module is realized.

[0059] Furthermore, in an optional embodiment, the display module is a white organic light emitting diode (WOLED) display module. In this embodiment, the light emitting material layer 152 further includes a white light emitting layer, and the display module further includes a white filter layer disposed at a position corresponding to the white light emitting layer.

[0060] That is to say, the luminescent material layer 152 of the embodiment of the present invention further adds a white luminescent layer to the structure of the red, yellow and blue luminescent pixel areas formed in the aforementioned embodiment to form a white luminescent pixel area. Through this setting, the white luminescent layer added to the WOLED can increase the screen brightness, further improving the applicable scenarios of the bottom reflection display module with a scattering layer 14 of the present invention.

[0061] In an optional embodiment, if Figure 2-Figure 4As shown, the film surfaces of the first electrode 151, the light-emitting material layer 152 and the second electrode 153 close to the substrate 11 are tooth-shaped structures 141 that are the same as the surface of the scattering layer 14, and the protruding directions of the film surfaces of the first electrode 151, the light-emitting material layer 152 and the second electrode 153 are the same as the protruding directions of the tooth-shaped structures 141 on the second surface, and the second surface is in contact with the surface of the first electrode 151 close to the substrate 11.

[0062] Based on the process of the layer structure, the scattering layer 14 is first formed in the embodiment of the present invention, and the light-emitting device layer 15 is formed on the scattering layer 14. Therefore, the structure of the light-emitting device layer 15 formed at the position of the tooth-shaped structure 141 of the scattering layer 14 is the same as the tooth-shaped structure 141 of the scattering layer 14, and morphology tracking is formed on the layer structure.

[0063] In an optional embodiment, if Figure 2-Figure 4 As shown, the display module further includes an encapsulation layer 16, the encapsulation layer 16 covers the surface of the second electrode 153 away from the substrate 11 and covers the surface of the scattering layer 14 between adjacent light-emitting device layers 15 away from the substrate 11, the surface of the encapsulation layer 16 close to the substrate 11 is the same as the tooth-shaped structure 141 of the second surface of the scattering layer 14, and the protruding direction of the tooth-shaped structure 141 of the encapsulation layer 16 is the same as the protruding direction of the tooth-shaped structure 141 of the second surface. In this embodiment, the encapsulation layer 16 is used to encapsulate the light-emitting device layer 15 to prevent water vapor intrusion, so as to improve the reliability of the display module.

[0064] Similarly, based on the process of the layer structure, in the embodiment of the present invention, a scattering layer 14 is first formed, a light-emitting device layer 15 is formed on the scattering layer 14, and then an encapsulation layer 16 is formed on the light-emitting device layer 15. Therefore, the structure of the encapsulation layer 16 formed at the position of the tooth-shaped structure 141 of the scattering layer 14 is the same as the tooth-shaped structure 141 of the scattering layer 14, and morphology tracking is formed on the layer structure.

[0065] The aforementioned embodiments of the present invention have made different arrangements for the distribution positions of the toothed structures 141 of the scattering layer 14, for example Figure 2 As shown, the entire second surface of the scattering layer 14 is provided with a tooth-shaped structure 141, and the surface of the encapsulation layer 16 close to the substrate 11 is designed to correspond to the morphology of the second surface of the scattering layer 14, and the entire surface of the encapsulation layer 16 is the tooth-shaped structure 141. Figure 3As shown, the tooth-shaped structure 141 is not provided at some positions on the second surface of the scattering layer 14. For example, the tooth-shaped structure 141 is not provided at the second surface of the scattering layer 14 corresponding to the interval between adjacent filter layers (1521-1523). Therefore, the surface of the encapsulation layer 16 close to the substrate 11 corresponds to the position where the second surface is not provided with the tooth-shaped structure 141, and the tooth-shaped structure 141 is also not provided. The morphology tracking is formed on the layer structure. That is, the surface of the second surface of the scattering layer 14 corresponding to the position of the interval between adjacent filter layers (1521-1523) is a plane. Based on this arrangement, optical crosstalk at the position of the interval between adjacent filter layers (1521-1523) can be avoided, thereby improving the display effect and the optical effect.

[0066] In an optional embodiment, the refractive index of the film material of the encapsulation layer 16 is the same as the refractive index of the film material of the scattering layer 14 .

[0067] The scattering layer 14 of the embodiment of the present invention is used to scatter the light emitted from the light-emitting device layer 15 toward the substrate 11. Since the film layer of the scattering layer 14 itself has a refractive index, in order to avoid the film layer refractive index of the scattering layer 14 affecting the light emitting effect of the display module, the refractive index of the film layer material of the encapsulation layer 16 is set to be the same as the refractive index of the film layer material of the scattering layer 14 in this embodiment, so as to reduce the refraction and reflection of light between different film layers, thereby ensuring the display effect while improving the optical effect of the display module. In a specific example, the refractive index of the scattering layer 14 is 1.4-2.0, so as to have a good display effect.

[0068] In an optional embodiment, if Figure 5 and Figure 6 As shown, the display module further includes a shielding layer 17 , and the shielding layer 17 is located between the gaps between the orthographic projections of two adjacent filter layers ( 1521 - 1523 ) on the substrate 11 in the orthographic projection of the substrate 11 .

[0069] In this embodiment, a shielding layer 17 is provided, and the shielding layer 17 is used to improve the light crosstalk between filter layers (1521-1523) of different colors. In this embodiment, the orthographic projection position of the shielding layer 17 and the filter layer (1521-1523) in the top-view direction is designed, but this embodiment does not limit the film layer position relationship between the shielding layer 17 and the filter layer (1521-1523) in the layer structure.

[0070] For example, in one embodiment, Figure 5 As shown, the shielding layer 17 and the filter layer (1521-1523) are not in the same layer, and the shielding layer 17 is arranged on the surface of the light emitting device layer 15 away from the substrate 11. The display module also includes:

[0071] a first planar layer 181 covering a surface of the light emitting device layer 15 away from the substrate 11,

[0072] A second flat layer 182 is arranged on the surface of the first flat layer 181 away from the substrate 11, and a shielding layer 17 is arranged on the surface of the first flat layer 181 away from the substrate 11, and the shielding layer 17 is located at positions corresponding to the red filter layer 131, the green filter layer 132 and the blue filter layer 133. Exemplarily, the thickness of the second flat layer 182 in the stacking direction is greater than the thickness of the shielding layer 17 in the stacking direction, thereby ensuring the surface flatness of the display module.

[0073] In an optional embodiment, the refractive index of the material of the first flat layer 181 and the second flat layer 182 is equal to the refractive index of the material layer of the encapsulation layer 16. Based on the principle of setting the refractive index of the material of the encapsulation layer 16 and the scattering layer 14 in the aforementioned embodiment, the embodiment of the present invention further ensures the display effect and light output effect of the display module under the structure of different layers of filter layers (1521-1523) and the shielding layer 17 by designing the refractive index.

[0074] In an alternative embodiment, Figure 6 As shown, the surface of the shielding layer 17 close to the substrate 11 and the surface of the filter layer (1521-1523) close to the substrate 11 are located on the same film layer surface, and the scattering layer 14 covers the surface of the shielding layer 17 away from the substrate 11 and covers the surface of the filter layer (1521-1523) away from the substrate 11.

[0075] In this embodiment, the shielding layer 17 is arranged on the same film surface as the filter layer (1521-1523), thereby reducing the film thickness. In this embodiment, the scattering layer 14 is arranged as a whole layer, so the scattering layer 14 also covers the shielding layer 17, and forms a topography following with the surface of the shielding layer 17 away from the substrate 11, so that the second surface of the scattering layer 14 corresponding to the surface at this position is a plane, thereby reducing the light crosstalk at the corresponding position of the shielding layer 17.

[0076] The height of each protrusion of the scattering surface in the direction from the substrate 11 to the color filter layer 13 or in the direction from the color filter layer 13 to the substrate 11 is 0.5 to 3 um. Based on the above embodiments, the embodiment of the present invention proposes a toothed structure 141 with a certain roughness, which plays a role in reflecting light out of the display module.

[0077] The above embodiments of the present invention illustrate the layer structure of the display module. Now, a projection pattern of the orthographic projection of the second surface of the scattering layer 14 on the substrate 11 is described with reference to a specific embodiment.

[0078] In an optional embodiment, if Figure 7 , Figure 8 as well as Fig. 9 As shown, the orthographic projection of the scattering surface on the substrate 11 is a patterned projection, and the shape of the patterned projection includes one or more of a circle, an ellipse, a triangle, a square, a pentagon or a hexagon.

[0079] In an optional embodiment, adjacent patterned projections of multiple scattering surfaces corresponding to the same color filter layer position have a common projection boundary. Figure 7 FIG. 1 shows a schematic diagram of the arrangement of the tooth-shaped structure 141 formed on the second surface of the scattering layer 14 at a position corresponding to the orthographic projection of a filter layer on the substrate 11, as shown in FIG. Figure 7 As shown, the patterned projections formed by the multiple scattering surfaces of the toothed structure 141 are closely packed structures, that is, the projection boundary of one hexagon is the projection boundary of another hexagon, realizing boundary multiplexing. Through this setting, the optimal scattering effect can be achieved, and the maximum utilization of light efficiency can be realized.

[0080] In an optional embodiment, the distance d1 between the endpoints of two projection boundaries of a patterned projection of a scattering surface is 2-20 um, based on Figure 7 In the structural diagram shown, the aperture of the patterned projection is 2 to 20 um.

[0081] In another embodiment, the projection boundaries of adjacent patterned projections of a plurality of scattering surfaces corresponding to the same color filter layer position at least have a common projection boundary. Figure 8 As shown, Figure 8 FIG. 1 shows another arrangement schematic diagram of the tooth-shaped structure 141 formed on the second surface of the scattering layer 14 at a position corresponding to the orthographic projection of a filter layer on the substrate 11, as shown in FIG. Figure 8 As shown, the patterned projections formed by the multiple scattering surfaces of the tooth-shaped structure 141 are multiple closely arranged circular projections arranged in an array, that is, the projection boundary of one circle and the projection boundary of another circle have an arc-shaped repeated boundary. Figure 2-Figure 4 The scattering surface of the embodiment shown in the cross-section of the layer structure is projected as an upward or downward semicircle. Therefore, the tooth-shaped structure 141 of this embodiment is a three-dimensional hemispherical structure. Figure 7 The hexagonal patterned projection shown is easier to manufacture, thereby improving process efficiency and product yield.

[0082] based on Figure 8In the structural diagram shown in FIG. 1 , in an optional embodiment, the diameter d2 of the circular patterned projection is 2 to 20 μm. In another embodiment, there is a gap between the projection boundaries of the adjacent patterned projections corresponding to the plurality of scattering surfaces at the same color filter layer position. In this embodiment, Fig. 9 As shown, the patterned projections formed by the multiple scattering surfaces of the tooth-shaped structure 141 are multiple array-arranged non-closely arranged hexagonal projections, that is, there is a gap between the projection boundary of one hexagon and the projection boundary of another hexagon. This setting is relative to Figure 7 The hexagonal patterned projection shown is easier to manufacture, and the process can adopt more manufacturing methods, thereby improving the process efficiency and product yield. Based on the above embodiments, the embodiments of the present invention do not limit the specific shapes of each scattering surface in a toothed structure 141, and the art is designed according to actual applications.

[0083] like Fig. 9 As shown, in an optional embodiment, the distance d3 between the projection boundaries of adjacent patterned projections with gaps is 1-5 um.

[0084] Based on the design of the toothed structure 141 of the above embodiment, the scattering layer 14 with roughness in this embodiment can be processed by laser direct writing, diamond processing, photolithography thermal reflow, dry etching, nanoimprinting and other methods. Therefore, the structure of this embodiment has process applicability.

[0085] Another embodiment of the present invention provides a display device, which includes the display module of the above embodiment. The display device can be any product or component with a display function, such as electronic paper, mobile phone, tablet computer, television, monitor, notebook computer, digital photo frame, navigator, etc., which is not limited in this embodiment.

[0086] Another embodiment of the present invention provides a method for manufacturing the display module of the above embodiment, the method comprising:

[0087] A driving circuit layer 12 is formed on the substrate 11;

[0088] forming a color filter layer 13 on the driving circuit layer 12;

[0089] forming a scattering layer 14 on the color filter layer 13;

[0090] A light emitting device layer 15 is formed on the scattering layer 14, wherein the roughness of a second surface of the scattering layer 14 close to the light emitting device layer 15 is greater than the roughness of a first surface close to the color filter layer 13, so as to scatter light emitted from the light emitting device layer 15 toward the substrate 11;

[0091] Wherein, forming the light emitting device layer 15 on the scattering layer 14 further comprises:

[0092] A first electrode 151 is formed on a side of the scattering layer 14 away from the substrate 11;

[0093] forming a light emitting material layer 152 on a side of the first electrode 151 away from the substrate 11; and

[0094] A second electrode 153 is formed on a side of the light emitting material layer 152 away from the substrate 11 , wherein the first electrode 151 is a transparent electrode and the second electrode 153 is a reflective electrode.

[0095] The process method for manufacturing a display module provided with a scattering layer 14 according to an embodiment of the present invention has a simple and efficient overall process and is not complicated. A variety of manufacturing processes can be used to manufacture the display module according to the embodiment of the present invention, and the process has wide process applicability. The scattering layer 14 with a roughness formed by the manufacturing method of this embodiment has a first surface and a second surface of the scattering layer 14 set to structures with different roughnesses, so that the roughness of the first surface located above the layer structure is greater than the roughness of the second surface located below the layer structure. Compared with Figure 1 As shown in the planar structure, the scattering structure of the embodiment of the present invention can break the total reflection of light in the film layer of the bottom reflection display module, thereby improving the light emission effect and improving the optical performance of the bottom reflection display module.

[0096] Now Figure 2 The structure of the display module shown in the figure is used to exemplify the manufacturing process of the structure:

[0097] A driving circuit layer 12 is formed on the substrate 11, and a color filter layer 13 is formed on the driving circuit layer 12, thereby forming Fig.10 10a structural diagram, using nano-imprinting process to form a scattering layer 14 having a toothed structure 141 on the color filter layer 13 to form a Fig.10 10b structural diagram, such as Fig.10 As shown in FIG. 10b, the toothed structure 141 of the scattering layer 14 is provided as a whole layer, and then the light emitting device layer 15 is formed on the scattering layer 14 to form a Fig.10 10c and 10d in the structural schematic diagrams, the patterned positions of the functional film layers of the light-emitting device layer 15 correspond to the red filter layer 131 , the blue filter layer 133 and the green filter layer 132 .

[0098] In a specific example, if Fig.10In the structural diagram 10c in FIG. 10 , the deposition and patterning process of the first electrode 151 of the light-emitting device layer 15 are first performed, so that the first electrode 151 corresponds to the red filter layer 131, the blue filter layer 133 and the green filter layer 132 respectively. In the description of the above embodiments, when the display module is a white light display module (WOLED), a white light-emitting layer is also formed at a position corresponding to the white filter layer, so as to realize a wide application of the display module of the present invention.

[0099] Further, such as Fig.10 In the structural diagram 10d in FIG. 1 , a light-emitting material layer 152 is deposited on the first electrode 151, and a second electrode 153 is deposited on the light-emitting material layer 152. The light-emitting material layer 152 and the second electrode 153 correspond to the red filter layer 131, the blue filter layer 133, and the green filter layer 132. Finally, the encapsulation layer 16 is deposited to form Fig.10 Schematic diagram of the structure of 10e is shown.

[0100] In another embodiment, Figure 3 The structure of the display module shown in the figure is used to exemplify the manufacturing process of the structure:

[0101] A driving circuit layer 12 is formed on the substrate 11, and a color filter layer 13 is formed on the driving circuit layer 12, thereby forming Fig.11 11a structural diagram, using nano-imprinting process to form the color filter layer 13 as shown in FIG. Fig.11 In the embodiment, the tooth-shaped structure 141 is formed at the positions corresponding to the red filter layer 131, the blue filter layer 133 and the green filter layer 132 by using a patterning process, but the intervals between the adjacent filter layers (1521-1523) are not patterned, so as to form the tooth-shaped structure 141 shown in FIG. Fig.11 Schematic diagram of the structure shown in Figure 11c.

[0102] In a specific example, if Fig.11 In the structural diagram 11d, the deposition and patterning process of the first electrode 151 of the light-emitting device layer 15 is first performed, so that the first electrode 151 corresponds to the red filter layer 131, the blue filter layer 133 and the green filter layer 132. In the description of the above embodiments, when the display module is a white light display module (WOLED), a white light-emitting layer is also formed at a position corresponding to the white filter layer, so as to realize a wide application of the display module of the present invention.

[0103] Further, such as Fig.11In the structural diagram 11e, the light emitting material layer 152 is deposited on the first electrode 151, and the second electrode 153 is deposited on the light emitting material layer 152. The light emitting material layer 152 and the second electrode 153 correspond to the red filter layer 131, the blue filter layer 133 and the green filter layer 132. Finally, the encapsulation layer 16 is deposited to form Fig.11 Schematic diagram of the 11f structure.

[0104] The process method for manufacturing a display module provided with a scattering layer 14 according to the embodiment of the present invention has a simple and efficient overall process and is not complicated. The display module according to the embodiment of the present invention can be manufactured by using a variety of manufacturing processes and has wide process applicability.

[0105] In the description of the present invention, relational terms such as first and second, etc. are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "comprise", "include" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the statement "comprises a ..." does not exclude the presence of other identical elements in the process, method, article or device including the element.

[0106] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not limitations on the embodiments of the present invention. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is impossible to list all the embodiments here. All obvious changes or modifications derived from the technical solution of the present invention are still within the protection scope of the present invention.

Claims

1. A display module, characterized in that: The display module comprises: a substrate, a driving circuit layer disposed on the substrate, a color filter layer disposed on the driving circuit layer, a scattering layer disposed on the color filter layer, and a light emitting device layer disposed on the scattering layer, The light emitting device layer comprises a first electrode disposed on a side of the scattering layer away from the substrate, a light emitting material layer disposed on a side of the first electrode away from the substrate, and a second electrode disposed on a side of the light emitting material layer away from the substrate, wherein the first electrode is a transparent electrode and the second electrode is a reflective electrode; The roughness of the second surface of the scattering layer close to the light emitting device layer is greater than the roughness of the first surface close to the color filter layer, and is used to scatter the light emitted from the light emitting device layer toward the substrate.

2. The display module according to claim 1, characterized in that: The second surface includes a tooth-shaped structure, and the tooth-shaped structures at different positions have different vertical heights from a side surface of the substrate. The tooth-shaped structure includes a plurality of scattering surfaces arranged in an array, and a protrusion of each scattering surface extends from the substrate toward the light-emitting device layer or from the light-emitting device layer toward the substrate.

3. The display module according to claim 2, characterized in that: The color filter layer includes a red filter layer, a green filter layer and a blue filter layer, and the tooth-shaped structure is arranged at a position corresponding to the orthographic projection of the red filter layer, the green filter layer and the blue filter layer on the substrate.

4. The display module according to claim 3, characterized in that: The surfaces of the first electrode, the light-emitting material layer and the film layer of the second electrode close to the substrate are tooth-shaped structures arranged in cooperation with the scattering layer, the protruding directions of the surfaces of the first electrode, the light-emitting material layer and the film layer of the second electrode are the same as the protruding directions of the tooth-shaped structures on the second surface, and the second surface is in contact with the surface of the first electrode close to the substrate.

5. The display module according to claim 4, characterized in that: The display module also includes an encapsulation layer, which covers the surface of the second electrode away from the substrate and the surface of the scattering layer between adjacent light-emitting device layers away from the substrate. The surface of the encapsulation layer close to the substrate is a toothed structure arranged in coordination with the scattering layer, and a protruding direction of the toothed structure of the encapsulation layer is the same as a protruding direction of the toothed structure of the second surface.

6. The display module according to claim 2, characterized in that: The orthographic projection of the scattering surface on the substrate is a patterned projection, and the shape of the patterned projection includes one or more of a circle, an ellipse, a triangle, a square, a pentagon or a hexagon.

7. The display module according to claim 6, characterized in that: The height of the protrusion of each scattering surface in the direction from the substrate to the color filter layer or in the direction from the color filter layer to the substrate is 0.5-3 um.

8. The display module according to claim 6, characterized in that: Adjacent patterned projections corresponding to a plurality of scattering surfaces at the same color filter layer position have a common projection boundary; or There are gaps between projection boundaries of adjacent patterned projections of a plurality of scattering surfaces corresponding to the same color filter layer position.

9. The display module according to claim 1, characterized in that: The display module is a white light organic light emitting diode display module.

10. The display module according to claim 5, characterized in that: The refractive index of the film material of the encapsulation layer is the same as the refractive index of the film material of the scattering layer.

11. The display module according to any one of claims 3 to 5, characterized in that: The display module further comprises a shielding layer, wherein the orthographic projection of the shielding layer on the substrate is located between the gaps between the orthographic projections of two adjacent filter layers on the substrate.

12. The display module according to claim 11, characterized in that: The surface of the shielding layer close to the substrate and the surface of the filter layer close to the substrate are located on the same film layer surface. The scattering layer covers a surface of the shielding layer away from the substrate and covers a surface of the filter layer away from the substrate.

13. A display device, characterized in that: The display device comprises the display module according to any one of claims 1-12.

14. A method for manufacturing the display module according to any one of claims 1 to 12, characterized in that: The method comprises: forming a driving circuit layer on the substrate; forming a color filter layer on the driving circuit layer; forming a scattering layer on the color filter layer; A light emitting device layer is formed on the scattering layer, wherein the roughness of a second surface of the scattering layer close to the light emitting device layer is greater than the roughness of a first surface close to the color filter layer, so as to scatter light emitted from the light emitting device layer toward the substrate; Wherein, forming a light emitting device layer on the scattering layer further comprises: forming a first electrode on a side of the scattering layer away from the substrate; forming a light emitting material layer on a side of the first electrode away from the substrate; and A second electrode is formed on a side of the light-emitting material layer away from the substrate, wherein the first electrode is a transparent electrode and the second electrode is a reflective electrode.

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