Display module, preparation method of display module and display device

Abstract

The application discloses a display module, a preparation method of the display module and a display device. The display module comprises a substrate, a light-emitting layer and a filter layer. The light-emitting layer is arranged on one side of the substrate and comprises a plurality of light-emitting units. The filter layer is arranged on the side of the light-emitting layer away from the substrate and comprises a filter part, a light-shielding part and an optical adjustment part. The filter part at least partially overlaps the light-emitting unit in the orthographic projection of the substrate. At least one optical adjustment part is arranged between adjacent filter parts. The optical adjustment part at least partially contacts the filter part, and the refractive index of the optical adjustment part is less than that of the filter part. The range of the orthographic projection of the light-shielding part on the substrate is within the range of the orthographic projection of the optical adjustment part on the substrate. The application can convert light with a large viewing angle into light with a normal viewing angle, thereby improving the light-emitting efficiency of the light with the normal viewing angle and reducing the power consumption of the display module.

Description

Technical Field

[0001] This application belongs to the field of display technology, and in particular relates to a display module, a method for preparing the display module, and a display device. Background Technology

[0002] Flat panel displays, such as liquid crystal display (LCD) panels, organic light-emitting diode (OLED) panels, and display panels utilizing light-emitting diode (LED) devices, are characterized by high... With its advantages such as high image quality, low power consumption, thin body, and wide range of applications, it has been widely used in various consumer electronics products such as mobile phones, televisions, personal digital assistants, digital cameras, laptops, and desktop computers, becoming the mainstream display device.

[0003] Currently, reducing the power consumption of display modules has become an urgent problem to be solved. Summary of the Invention

[0004] The purpose of this application is to provide a display module, a method for manufacturing the display module, and a display device, which aims to solve the problem of high power consumption in existing display modules.

[0005] A first aspect of this application provides a display module, including a substrate, a light-emitting layer, and a light-filtering layer. The light-emitting layer is disposed on one side of the substrate and includes a plurality of light-emitting units. The light-filtering layer is disposed on the side of the light-emitting layer opposite to the substrate and includes a filtering portion, a light-shielding portion, and an optical adjustment portion. The orthographic projection of the filtering portion onto the substrate at least partially overlaps with the orthographic projection of the light-emitting units onto the substrate. At least one optical adjustment portion is disposed between adjacent filtering portions, and the optical adjustment portion is at least partially in contact with the filtering portion. The refractive index of the optical adjustment portion is less than that of the filtering portion. The range of the orthographic projection of the light-shielding portion onto the substrate is within the range of the orthographic projection of the optical adjustment portion onto the substrate.

[0006] In some embodiments, the orthographic projection of the optical adjustment unit onto the substrate does not overlap with the orthographic projection of the light-emitting unit onto the substrate; Preferably, in the direction parallel to the substrate, the difference between the distance from the edge of the filter section to the optical adjustment section and the distance from the filter section to the edge of the light-shielding section is L, and L satisfies the following condition: 3μm≤L≤6μm; Preferably, the light-emitting unit includes a first light-emitting unit, a second light-emitting unit, and a third light-emitting unit with different colors, and the filter part includes a first filter part, a second filter part, and a third filter part. The orthographic projection of the first filter part on the substrate at least partially overlaps with the first light-emitting unit, the orthographic projection of the second filter part on the substrate at least partially overlaps with the second light-emitting unit, and the orthographic projection of the third filter part on the substrate at least partially overlaps with the third light-emitting unit. Along a direction parallel to the substrate, the difference between the distance from the edge of the first filter section to the optical adjustment section and the distance from the first filter section to the edge of the light-shielding section is L1, the difference between the distance from the edge of the second filter section to the optical adjustment section and the distance from the edge of the second filter section to the light-shielding section is L2, and the difference between the distance from the edge of the third filter section to the optical adjustment section and the distance from the edge of the third filter section to the light-shielding section is L3. L1, L2, and L3 satisfy the following conditions: L1 > L2, L1 > L3; wherein, the luminous efficiency of the first light-emitting unit is less than the luminous efficiency of the second light-emitting unit and the third light-emitting unit, respectively. Preferably, the first light-emitting unit is a blue light-emitting unit; Preferably, L1, L2, and L3 satisfy the following condition: L1 > L2 > L3; wherein, the white light brightness ratio of the third light-emitting unit is greater than that of the first light-emitting unit and the second light-emitting unit, respectively. Preferably, the third light-emitting unit is a green light-emitting unit.

[0007] In some embodiments, the orthographic projection of the optical adjustment section onto the substrate overlaps with the orthographic projection of the filter section onto the substrate. Preferably, the angle between the side wall of the optical adjustment section facing the filter section and the plane parallel to the substrate direction is α, and α satisfies the following condition: 60°≤α≤90°; Preferably, α satisfies the following condition: 70°≤α≤80°; Preferably, the light-emitting unit includes a first light-emitting unit, a second light-emitting unit, and a third light-emitting unit with different colors, and the filter part includes a first filter part, a second filter part, and a third filter part. The orthographic projection of the first filter part on the substrate at least partially overlaps with the first light-emitting unit, the orthographic projection of the second filter part on the substrate at least partially overlaps with the second light-emitting unit, and the orthographic projection of the third filter part on the substrate at least partially overlaps with the third light-emitting unit. The angle between the sidewall of the optical adjustment section facing the first filter and the plane parallel to the substrate direction is α1; the angle between the sidewall of the optical adjustment section facing the second filter and the plane parallel to the substrate direction is α2; and the angle between the sidewall of the optical adjustment section facing the third filter and the plane parallel to the substrate direction is α3. α1, α2, and α3 satisfy the following condition: |α1-β| < |α2-β|, and |α1-β| < |α3-β|, where β is the critical angle for total internal reflection at the interface where the optical adjustment section and the filter come into contact. The luminous efficiency of the first light-emitting unit is less than that of the second and third light-emitting units, respectively. Preferably, the first light-emitting unit is a blue light-emitting unit; Preferably, α1, α2, and α3 satisfy the following condition: |α1-α3|>|α1-α2|; wherein, the white light brightness ratio of the third light-emitting unit is greater than that of the first and second light-emitting units, respectively; Preferably, the third light-emitting unit is a green light-emitting unit.

[0008] In some embodiments, the light-emitting layer further includes a pixel definition layer having a pixel opening, the light-emitting unit being located within the pixel opening, and the orthographic projection of the optical adjustment unit onto the substrate being located within the orthographic projection of the pixel definition layer onto the substrate. Preferably, the distance between the optical adjustment part and the sidewall of the pixel opening in the direction parallel to the substrate is D, and D satisfies the following condition: 0μm≤D≤5μm.

[0009] In some embodiments, the optical adjustment section includes an organic material; Preferably, the thickness of the optical adjustment part is H, where H satisfies the following condition: 1.5μm≤H≤5μm; Preferably, the refractive index of the optical adjustment section is n1, and n1 satisfies the following condition: n1≤1.55; Preferably, n1 satisfies the following condition: 1.4 ≤ n1 ≤ 1.55; Preferably, the optical adjustment section includes at least one of polyimide and polymethyl methacrylate; Preferably, the refractive index of the filter section is n2, and n2 satisfies the following condition: n2≥1.6; Preferably, the display module further includes a protective layer disposed on the side of the filter layer away from the substrate, wherein the refractive index of the protective layer is less than the refractive index of the filter layer.

[0010] In some embodiments, the optical adjustment section is disposed on the side of the light-shielding section away from the substrate; Preferably, the optical adjustment section at least covers the sidewall surface of the light-shielding section; Preferably, the display module further includes a touch layer disposed between the light-emitting layer and the filter layer, the touch layer including an insulating layer, and the optical adjustment part being made of the same material as the insulating layer.

[0011] In some embodiments, the optical adjustment section is disposed between the light-emitting layer and the light-shielding section; Preferably, the display module further includes a touch layer disposed between the light-emitting layer and the filter layer, and the optical adjustment unit is reused as an insulating layer in the touch layer.

[0012] A second aspect of this application provides a method for manufacturing a display module, comprising the following steps: A light-emitting layer is formed on one side of the substrate; wherein the light-emitting layer includes multiple light-emitting units; A light-shielding portion and an optical adjustment portion of a filter layer are formed on the side of the light-emitting layer away from the substrate; wherein the range of the light-shielding portion in the orthogonal projection of the substrate is within the range of the optical adjustment portion in the orthogonal projection of the substrate. A filter portion of a filter layer is formed on the side of the light-emitting layer away from the substrate; wherein the orthographic projection of the filter portion onto the substrate and the orthographic projection of the light-emitting unit onto the substrate at least partially overlap, at least one optical adjustment portion is located between adjacent filter portions, the optical adjustment portion is at least partially in contact with the filter portion, and the refractive index of the optical adjustment portion is less than the refractive index of the filter portion.

[0013] In some embodiments, the step of forming a light-shielding portion and an optical adjustment portion on the side of the light-emitting layer opposite to the substrate includes: A light-shielding portion is formed on the side of the light-emitting layer that faces away from the substrate; An optical adjustment section is formed on the side of the light-shielding section that is away from the substrate; or, An optical adjustment section is formed on the side of the light-emitting layer that is away from the substrate; A light-shielding part is formed on the side of the optical adjustment part that is away from the substrate; or, An electrode layer for the touch layer is formed on the side of the light-emitting layer that faces away from the substrate; An optical adjustment section is formed on the side of the electrode layer away from the substrate; wherein the optical adjustment section is reused as an insulating layer of the touch layer; A light-shielding section is formed on the side of the optical adjustment section away from the substrate.

[0014] A third aspect of this application provides a display device, including a display module according to any of the above embodiments, or prepared using the preparation method of any of the above embodiments.

[0015] The display module of this application embodiment includes a substrate, a light-emitting layer, and a filter layer. The filter layer includes a filter portion, a light-shielding portion, and an optical adjustment portion. The orthographic projection of the filter portion onto the substrate at least partially overlaps with the orthographic projection of the light-emitting unit onto the substrate. The range of the orthographic projection of the light-shielding portion onto the substrate is within the range of the orthographic projection of the optical adjustment portion onto the substrate. At least one optical adjustment portion is located between adjacent filter portions, and the optical adjustment portion and the filter portion are at least partially in contact. The refractive index of the optical adjustment portion is less than that of the filter portion. Therefore, when light with a wide viewing angle enters the optical adjustment portion from the filter portion, total internal reflection easily occurs at the interface where the filter portion and the optical adjustment portion are in contact, and it is not absorbed by the light-shielding portion. This converts the light with a wide viewing angle into a positive viewing angle, thereby improving the light extraction efficiency of the positive viewing angle and reducing the power consumption of the display module. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the embodiments of this application will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 A cross-sectional schematic diagram of a display module provided in an embodiment of this application; Figure 2 This is another cross-sectional schematic diagram of the display module provided in the embodiments of this application; Figure 3 This is another cross-sectional schematic diagram of the display module provided in the embodiments of this application; Figure 4 This is a partial schematic diagram of a display module provided in an embodiment of this application; Figure 5 This is another partial schematic diagram of the display module provided in the embodiments of this application; Figure 6 This is another cross-sectional schematic diagram of the display module provided in the embodiments of this application; Figure 7 This is a partial schematic diagram of a display module provided in an embodiment of this application; Figure 8 This is another cross-sectional schematic diagram of the display module provided in the embodiments of this application; Figure 9 This is another partial schematic diagram of the display module provided in the embodiments of this application; Figure 10 This is another cross-sectional schematic diagram of the display module provided in the embodiments of this application; Figure 11 This is another cross-sectional schematic diagram of the display module provided in the embodiments of this application; Figure 12A schematic flowchart illustrating the manufacturing method of the display module provided in this application embodiment; Figures 13-20 This is a schematic diagram illustrating the manufacturing process of the display module provided in the embodiments of this application.

[0018] The attached icons are numbered as follows: 100. Display module; 10. Substrate; 20. Light-emitting layer; 21. First electrode; 22. Light-emitting unit; First light-emitting unit 22a; Second light-emitting unit 22b; Third light-emitting unit 22c; 23. Second electrode; 30. Filter layer; 31. Filter section; 31a. First filter section; 32a. Second filter section; 32c. Third filter section; 32. Light-shielding section; 33. Optical adjustment section; 34. Lens; 40. Encapsulation layer; 50. Pixel definition layer; 51. Pixel limiting section; 52. Pixel opening; 60. Protective layer; 70. Touch layer; 71. Insulating layer; 72. Electrode layer. Detailed Implementation

[0019] The embodiments of this application will be described in further detail below with reference to the accompanying drawings and examples. The detailed description of the following embodiments and the accompanying drawings are used to illustrate the principles of this application by way of example, but should not be used to limit the scope of this application, that is, this application is not limited to the described embodiments.

[0020] In the description of this application, it should be noted that, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," and "outer," etc., indicating orientation or positional relationships, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this application. Furthermore, the terms "first," "second," and "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance. "Vertical" is not vertical in the strict sense, but within the allowable tolerance range. "Parallel" is not parallel in the strict sense, but within the allowable tolerance range.

[0021] In this application, the reference to "embodiment" means that a specific feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a mutually exclusive, independent, or alternative embodiment. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described in this application can be combined with other embodiments.

[0022] The directional terms used in the following description refer to the directions shown in the figures and are not intended to limit the specific structure of this application. It should also be noted in the description of this application that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0023] Because the display module reflects ambient light outdoors or in high-brightness environments, its visibility is reduced, affecting its display performance. Furthermore, the metal traces and anodes within the display module have extremely high reflectivity, resulting in a generally high reflectivity for the entire display module.

[0024] For organic light-emitting diode (OLED) display panels, polarizers effectively reduce the reflectivity of the display panel under strong light, but this results in a loss of nearly 58% of the light emitted by the display module. This significantly increases the lifespan of the display module. Furthermore, the polarizer's thickness of approximately 100μm is relatively large and the material is brittle, which is detrimental to the development of flexible products. To develop flexible products based on display modules, polarizer-free (POL-less) technology is typically used to manufacture the display module. POL-less technology refers to the use of color filters (CF) technology instead of polarizers. The color filter layer consists of a filter element and a black matrix (BM). In the display module, the filter element is responsible for the light emission of different colored sub-pixels, while the black matrix mainly serves to prevent light leakage and reduce the reflectivity of the display module. Since light from wide viewing angles is absorbed by the black matrix, the light emission efficiency is reduced, thereby increasing the power consumption of the display module.

[0025] To address the aforementioned issues, this application provides a display module, a method for manufacturing the display module, and a display device. The following description, in conjunction with the accompanying drawings, details various embodiments of the display module, the method for manufacturing the display module, and the display device.

[0026] This application provides a display module, which can be an organic light-emitting diode (OLED) display module, or other types of display panels, such as micro light-emitting diode (Micro-LED) or quantum light-emitting diode (QLED) display modules.

[0027] likeFigure 1 As shown, the first aspect of this application provides a display module 100, including a substrate 10, a light-emitting layer 20, and a light-filtering layer 30. The light-emitting layer 20 is disposed on one side of the substrate 10 and includes a plurality of light-emitting units 22. The light-filtering layer 30 is disposed on the side of the light-emitting layer 20 away from the substrate 10 and includes a light-filtering portion 31, a light-shielding portion 32, and an optical adjustment portion 33. The orthographic projection of the light-filtering portion 31 onto the substrate 10 at least partially overlaps with the orthographic projection of the light-emitting unit 22 onto the substrate 10. At least one optical adjustment portion 33 is disposed between adjacent light-filtering portions 31 and is at least partially in contact with the light-filtering portion 31. The refractive index of the optical adjustment portion 33 is less than the refractive index of the light-filtering portion 31. The range of the orthographic projection of the light-shielding portion 32 onto the substrate 10 is within the range of the orthographic projection of the optical adjustment portion 33 onto the substrate 10.

[0028] The substrate 10 includes a substrate and an array layer. The substrate can be a flexible substrate made of materials such as polyimide (PI) or polyethylene terephthalate (PET) to allow the display panel to be bent, or a rigid substrate made of materials such as glass or ceramic. The array layer contains a driving circuit for controlling the light emission of the light-emitting layer 20. The array layer is generally composed of inorganic film layers such as metal layers, semiconductor layers (active layers), and insulating layers. By patterning these inorganic film layers, a driving circuit for controlling the light emission of the light-emitting layer 20 can be formed. There are various ways to implement the specific circuit structure, which will not be elaborated here.

[0029] The light-emitting layer 20 includes a first electrode 21, a light-emitting unit 22, and a second electrode 23 sequentially stacked along a direction away from the substrate 10. The first electrode 21, the light-emitting unit 22, and the second electrode 23 are sequentially stacked to form a sub-pixel. The light-emitting unit 22 can be formed by stacking various film layer structures. For example, the light-emitting unit 22 may include a hole injection layer (HIL), a hole transport layer (HTL), a light-emitting layer, an electron injection layer (EIL), and an electron transport layer (ETL). When the first electrode 21 and the second electrode 23 are energized, the first electrode 21 can be an anode and the second electrode 23 can be a cathode. Electrons and holes migrate from the electron transport layer and the hole transport layer to the light-emitting layer, respectively, and meet in the light-emitting layer to form excitons that excite the light-emitting molecules, thereby generating visible light for display purposes. In other embodiments, multiple light-emitting units 22 may also be disposed between the first electrode 21 and the second electrode 23, and a charge generation layer (CGL) may be disposed between the light-emitting units 22.

[0030] The display module 100 includes multiple pixel units, each of which may contain three sub-pixels: red, green, and blue. Each sub-pixel's light-emitting unit 22 has a corresponding light-emitting material; it may also contain sub-pixels of other colors. The orthographic projection of the filter section 31 onto the substrate 10 at least partially overlaps with the orthographic projection of the light-emitting unit 22 onto the substrate 10. That is, multiple filter sections 31 and multiple light-emitting units 22 are respectively and correspondingly arranged. The filter section 31 is used to filter light of other colors, ensuring that only the desired color of light passes through. For example, the filter section 31 above the light-emitting unit 22 of the red sub-pixel only allows red light to pass through, the filter section 31 above the light-emitting unit 22 of the green sub-pixel only allows green light to pass through, and the filter section 31 of the light-emitting unit 22 of the blue sub-pixel only allows blue light to pass through. Thus, when current passes through the corresponding light-emitting unit 22, each sub-pixel will only emit light of a specific color, thereby forming a color image.

[0031] The projection of the light-shielding part 32 onto the substrate 10 does not overlap with the projection of the light-emitting unit 22 onto the substrate 10. The light-shielding part 32 can be a black matrix, which can reduce or prevent ambient light from entering the area between adjacent light-emitting units 22, thus improving display interference without affecting the light emission of the light-emitting unit 22.

[0032] The orthographic projection of the light-shielding portion 32 onto the substrate 10 is located within the range of the orthographic projection of the optical adjustment portion 33 onto the substrate 10. At least one optical adjustment portion 33 is disposed between adjacent light-filtering portions 31, and the optical adjustment portion 33 and the light-filtering portion 31 are at least partially in contact with each other. Figure 2 As shown, an optical adjustment section 33 can be provided only beside the filter section 31 of the light-emitting unit 22 of a certain color. For example, since the power consumption of the light-emitting unit 22 of the blue sub-pixel is relatively high, an optical adjustment section 33 can be provided beside the filter section 31 of the light-emitting unit 22 of the blue sub-pixel. Or as... Figure 1 As shown, an optical adjustment section 33 may also be provided on the side of the filter section 31 of all light-emitting units 22.

[0033] There is a contact interface between the optical adjustment section 33 and the filter section 31. The contact interface may be only the side wall of the optical adjustment section 33; or it may include the side wall of the optical adjustment section 33 and part of the top edge of the optical adjustment section 33.

[0034] It should be noted that "the orthographic projection of the light-shielding portion 32 onto the substrate 10 is within the range of the orthographic projection of the optical adjustment portion 33 onto the substrate 10" means that the outline of the orthographic projection of the light-shielding portion 32 onto the substrate 10 is within the outline of the orthographic projection of the optical adjustment portion 33 onto the substrate 10. For example, the optical adjustment portion 33 is disposed on the side of the light-shielding portion 32 away from the light-emitting layer 20. The optical adjustment portion 33 can completely cover the side of the light-shielding portion 32 away from the light-emitting layer 20, or it can partially cover the side of the light-shielding portion 32 away from the light-emitting layer 20, for example, only covering the edge of the light-shielding portion 32. In addition, the optical adjustment portion 33 can also be disposed between the light-shielding portion 32 and the light-emitting layer 20.

[0035] Since the refractive index of the filter section 31 is generally high, by providing an optical adjustment section 33 with a lower refractive index, total internal reflection occurs between the optical adjustment section 33 and the filter section 31. For example, when a wide-angle light ray S enters the optical adjustment section 33 from the filter section 31, total internal reflection easily occurs at the interface where the filter section 31 and the optical adjustment section 33 contact, and it is not absorbed by the light-shielding section 32, thus converting the wide-angle light ray S into a positive angle. In other words, the wide-angle light ray S that would otherwise be absorbed by the light-shielding section 32 is converted and utilized, thereby improving the light extraction efficiency at a positive angle and reducing the power consumption of the display module 100.

[0036] It should be noted that "large angle of view" refers to a side angle that deviates significantly from the normal angle of view, such as 30° to 89°. "Total internal reflection" refers to the phenomenon where light is completely reflected at an interface. When light travels from a denser medium to a less dense medium, if the angle of incidence is greater than the critical angle, the angle of refraction will exceed 90 degrees. This means that the light cannot pass through the interface and is completely reflected back to the incident medium. In this case, all the energy of the light at the interface is reflected, and no light is transmitted.

[0037] In summary, the embodiments of this application utilize color filter (CF) technology. By adding a low-refractive-index optical adjustment unit 33, which works in conjunction with the color filter unit 31 to form a microlens array (MLA), the light from a wide viewing angle is converted into a positive viewing angle, thereby improving the light extraction efficiency of the positive viewing angle and reducing the power consumption of the display module 100.

[0038] Furthermore, in this embodiment, only a low-refractive-index optical adjustment unit 33 needs to be added, without the need to fabricate additional high-refractive-index films, to form a microlens array (MLA), simplifying the process, saving on the number of photomasks, and reducing costs. Moreover, since this embodiment only requires the optical adjustment unit 33 and does not require additional films to form a microlens array, it can also reduce light loss.

[0039] Optionally, the display module 100 may further include an encapsulation layer 40, which is located between the light-emitting layer 20 and the light-filtering layer 30. The encapsulation layer 40 covers the light-emitting layer 20 to protect it from corrosion and damage by moisture and oxygen. The encapsulation layer 40 may be a thin-film encapsulation layer 40, for example, it may include an inorganic encapsulation layer 40, an organic encapsulation layer 40, and an inorganic encapsulation layer 40 stacked together to block moisture and oxygen.

[0040] In some embodiments, the orthographic projection of the optical adjustment unit 33 onto the substrate 10 does not overlap with the orthographic projection of the light-emitting unit 22 onto the substrate 10, thereby ensuring that the light-emitting unit 22 is directly above the filter unit 31, which does not affect the light emission efficiency of the light-emitting unit 22 at the orthographic viewing angle.

[0041] Please refer to the following: Figures 1-3 In some embodiments, the difference between the distance from the filter section 31 to the optical adjustment section 33 and the distance from the filter section 31 to the edge of the light-shielding section 32 in a direction parallel to the substrate 10 is L, and L satisfies the following condition: L > 0 μm.

[0042] It should be noted that the "difference between the distance from the edge of the filter section 31 to the edge of the optical adjustment section 33 and the distance from the edge of the filter section 31 to the edge of the light-shielding section 32" refers to the distance between the edge of the optical adjustment section 33 along the direction parallel to the substrate 10 and the edge of the light-shielding section 32 along the direction parallel to the substrate 10. Furthermore, the aforementioned filter section 31, optical adjustment section 33, and light-shielding section 32 are based on the same light-emitting unit 22, meaning they are located above and corresponding to the same light-emitting unit 22. For example, the optical adjustment section 33 can be disposed above the light-shielding section 32 and cover the sidewall of the light-shielding section 32; the optical adjustment section 33 can also be disposed below the light-shielding section 32, with the edge of the optical adjustment section 33 protruding outward relative to the edge of the light-shielding section 32. In this embodiment, since the edge of the optical adjustment section 33 protrudes from the edge of the light-shielding section 32, the protruding part replaces part of the original light-shielding section 32, thereby reducing the absorption of wide-angle light by the light-shielding section 32. Moreover, the contact interface between the optical adjustment section 33 and the filter section 31 is increased, so more wide-angle light can undergo total internal reflection at the contact interface, thereby further improving the light output efficiency at the positive angle and reducing power consumption.

[0043] Optional, such as Figure 3 As shown, the filter section 31 can cover the entire extended edge of the optical adjustment section 33 relative to the light-shielding section 32. Figure 4 As shown, a lens 34 can also be provided on the side of the optical adjustment section 33 away from the light-emitting layer 20. The lens 34 is positioned close to the light-shielding section 32, and the filter section 31 covers both the optical adjustment section 33 and the lens 34 to further improve the luminous efficiency of the light-emitting unit 22. Or as... Figure 5As shown, it is also possible to cover only the portion of the optical adjustment section 33 that extends relative to the light-shielding section 32, that is, the filter section 31 and the light-shielding section 32 do not contact each other, and there is a gap between them.

[0044] like Figure 3 As shown, in some embodiments, the extension length of the optical adjustment part 33 relative to the light-shielding part 32 in the direction parallel to the substrate 10 is L, and L satisfies the following condition: 3μm≤L≤6μm.

[0045] If L is too small, it cannot effectively convert and utilize more light from a wide viewing angle that would otherwise be absorbed by the light-shielding part 32, thus failing to improve luminous efficiency. If L is too large, it will affect the function of the light-shielding part 32, making it impossible to reduce or prevent ambient light from entering the area between adjacent light-emitting units 22, thus failing to improve display interference and affecting the light emission of the light-emitting units 22. In this embodiment, the extension length L of the optical adjustment part 33 relative to the light-shielding part 32 is reasonable, which can improve luminous efficiency and reduce the reflectivity of ambient light and the reflectivity inside the display module 100.

[0046] like Figure 6 As shown, in some embodiments, the light-emitting layer 20 includes a first light-emitting unit 22a, a second light-emitting unit 22b, and a third light-emitting unit 22c, each with a different color. The light-filtering section 31 includes a first light-filtering section 31a, a second light-filtering section 32a, and a third light-filtering section 32c. The orthographic projection of the first light-filtering section 31a onto the substrate 10 at least partially overlaps with the first light-emitting unit 22a. The orthographic projection of the second light-filtering section 32a onto the substrate 10 at least partially overlaps with the second light-emitting unit 22b. The orthographic projection of the third light-filtering section 32c onto the substrate 10 at least partially overlaps with the third light-emitting unit 22c. For example, the first light-filtering section 31a is located directly above the first light-emitting unit 22a, the second light-filtering section 32a is located directly above the second light-emitting unit 22b, and the third light-filtering section 32c is located directly above the third light-emitting unit 22c. The light emitted by the first light-emitting unit 22a passes through the first filter 31a and is emitted from the light-emitting side of the display module 100. The light emitted by the second light-emitting unit 22b passes through the second filter 32a and is emitted from the light-emitting side of the display module 100. The light emitted by the third light-emitting unit 22c passes through the third filter 32c and is emitted from the light-emitting side of the display module 100.

[0047] Along a direction parallel to the substrate 10, the difference between the distance from the edge of the first filter section 31a to the optical adjustment section 33 and the distance from the first filter section 31a to the edge of the light-shielding section 32 is L1; the difference between the distance from the edge of the second filter section 32a to the optical adjustment section 33 and the distance from the edge of the second filter section 32a to the light-shielding section 32 is L2; ​​and the difference between the distance from the edge of the third filter section 32c to the optical adjustment section 33 and the distance from the edge of the third filter section 32c to the light-shielding section 32 is L3. L1, L2, and L3 satisfy the following conditions: L1 > L2, L1 > L3; wherein, the luminous efficiency of the first light-emitting unit 22a is less than the luminous efficiency of the second light-emitting unit 22b and the third light-emitting unit 22c, respectively.

[0048] Since the light-emitting materials of the different colored light-emitting units 22 are different, their luminous efficiencies are also different, resulting in different power consumption. For example, the first light-emitting unit 22a is a blue light-emitting unit 22, the second light-emitting unit 22b is a red light-emitting unit 22, and the third light-emitting unit 22c is a green light-emitting unit 22. Compared with the light-emitting materials of the red and green light-emitting units 22, the electron-photon energy conversion efficiency of the light-emitting material of the blue light-emitting unit 22 is lower, resulting in relatively lower luminous efficiency and therefore the highest power consumption. In this embodiment, the first light-emitting unit 22a with the lowest luminous efficiency is configured such that the difference L1 between the distance from the first filter section 31a to the edge of the optical adjustment section 33 and the distance from the first filter section 31a to the edge of the light-shielding section 32 is the longest. This maximizes the light emission efficiency of the first light-emitting unit 22a at its forward viewing angle, thereby reducing the power consumption of the display module 100.

[0049] In some embodiments, L1, L2, and L3 satisfy the following condition: L1 > L2 > L3; wherein the white light brightness ratio of the third light-emitting unit 22c is greater than the white light brightness ratio of the first light-emitting unit 22a and the second light-emitting unit 22b, respectively.

[0050] It should be noted that "white light brightness ratio" refers to the proportion of the luminous brightness contributed by each luminous unit 22 when the first luminous unit 22a, the second luminous unit 22b, and the third luminous unit 22c are mixed to produce white light, with a total brightness of 100%. For example, if the first luminous unit 22a is a blue luminous unit 22, the second luminous unit 22b is a red luminous unit 22, and the third luminous unit 22c is a green luminous unit 22, then the third luminous unit 22c has the largest white light brightness ratio, for example, 60%, while the white light brightness ratios of the first luminous unit 22a and the second luminous unit 22b are 20% each.

[0051] In this embodiment, the third light-emitting unit 22c with the highest white light brightness ratio is configured such that the difference L3 between the distance from the third filter section 32c to the edge of the optical adjustment section 33 and the distance from the third filter section 32c to the edge of the light-shielding section 32 is the shortest. Compared with the first light-emitting unit 22a and the second light-emitting unit 22b, the proportion of light emitted from a wide viewing angle to light emitted from a normal viewing angle can be reduced. This ensures that the proportion of light emitted from the third light-emitting unit 22c at a wide viewing angle is still relatively large while improving the luminous efficiency. This further ensures that color shift is not easily generated when observing the display module 100 at a wide viewing angle.

[0052] In some embodiments, the orthographic projection of the optical adjustment section 33 onto the substrate 10 partially overlaps with the orthographic projection of the filter section 31 onto the substrate 10. That is, the filter section 31 covers the sidewalls of the optical adjustment section 33 and may also cover a portion of the top surface of the optical adjustment section 33. Since the optical adjustment section 33 and the filter section 31 are partially overlapped in this embodiment, not only can the contact interface between the optical adjustment section 33 and the filter section 31 be increased, but space can also be saved and the spacing between each sub-pixel can be reduced, thereby improving the luminous efficiency of the display module 100.

[0053] like Figure 7 As shown, in some embodiments, the angle between the sidewall of the optical adjustment unit 33 and the plane parallel to the direction of the substrate 10 is α, where α satisfies the condition: 60°≤α≤90°. The sidewall of the optical adjustment unit 33 can be an inclined plane, a vertical plane perpendicular to the substrate 10, or a curved surface. When it is a curved surface, the angle α is the angle between the tangent of the curved surface and the plane parallel to the direction of the substrate 10. The magnitude of α determines whether the light is mainly emitted from the side view or from the front view when total internal reflection occurs at the contact interface between the optical adjustment unit 33 and the filter unit 31. If α is set too small, when total internal reflection occurs at the contact interface between the optical adjustment unit 33 and the filter unit 31, most of the light will be emitted from the side view. In this embodiment, α is set to 60°~90°. When most of the light from the wide viewing angle enters the optical adjustment section 33 through the filter section 31, total internal reflection occurs at the contact interface between the optical adjustment section 33 and the filter section 31, and the light will be emitted from the positive viewing angle, thereby further improving the light output efficiency of the positive viewing angle.

[0054] Furthermore, α satisfies the following condition: 70°≤α≤80°. If the angle of α is too large, for example, 80°<α≤90°, then when total internal reflection occurs at the contact interface between the optical adjustment unit 33 and the filter unit 31, some light may still exit from the side viewing angle. Setting α to 70°≤α≤80° can further ensure that more light will exit from the frontal viewing angle when total internal reflection occurs at the contact interface between the optical adjustment unit 33 and the filter unit 31, thereby improving the light extraction efficiency at the frontal viewing angle.

[0055] In some embodiments, the light-emitting unit 22 includes a first light-emitting unit 22a, a second light-emitting unit 22b, and a third light-emitting unit 22c, each with a different color. The light-filtering part 31 includes a first light-filtering part 31a, a second light-filtering part 32a, and a third light-filtering part 32c. The orthographic projection of the first light-filtering part 31a onto the substrate 10 at least partially overlaps with the first light-emitting unit 22a. The orthographic projection of the second light-filtering part 32a onto the substrate 10 at least partially overlaps with the second light-emitting unit 22b. The orthographic projection of the third light-filtering part 32c onto the substrate 10 at least partially overlaps with the third light-emitting unit 22c.

[0056] like Figure 8 As shown, the angle between the sidewall of the optical adjustment unit 33 facing the first filter unit 31a and the plane parallel to the direction of the substrate 10 is α1; the angle between the sidewall of the optical adjustment unit 33 facing the second filter unit 32a and the plane parallel to the direction of the substrate 10 is α2; and the angle between the sidewall of the optical adjustment unit 33 facing the third filter unit 32c and the plane parallel to the direction of the substrate 10 is α3. α1, α2, and α3 satisfy the following condition: |α1-β| < |α2-β|, and |α1-β| < |α3-β|, where β is the critical angle for total internal reflection at the interface where the optical adjustment unit 33 and the filter unit 31a contact; and the luminous efficiency of the first light-emitting unit 22a is less than that of the second light-emitting unit 22b and the third light-emitting unit 22c, respectively.

[0057] Because the light-emitting materials of the different colored light-emitting units 22 are different, their luminous efficiencies are also different, resulting in different power consumption. For example, the first light-emitting unit 22a is a blue light-emitting unit 22, the second light-emitting unit 22b is a red light-emitting unit 22, and the third light-emitting unit 22c is a green light-emitting unit 22. Compared with the light-emitting materials of the red and green light-emitting units 22, the electron-photon energy conversion efficiency of the light-emitting material of the blue light-emitting unit 22 is lower, resulting in a relatively lower luminous efficiency and therefore the highest power consumption for the blue light-emitting unit 22.

[0058] The critical angle for total internal reflection is determined by the difference in refractive index when light travels from an optically denser medium to an optically less dense medium. When light travels from an optically denser medium to an optically less dense medium, it refracts. At a specific angle, when the angle of refraction equals 90 degrees, total internal reflection occurs, and the light returns completely to its original medium without crossing the interface. The critical angle is the maximum angle of incidence that allows total internal reflection, and it can be calculated using Snell's law. Snell's law states that when light passes through the interface between two media, the angle of incidence (θ) is the maximum angle of incidence. i ) and angle of refraction (θ) r The following relationship exists between n and n: i *sin(θ) i)=n r *sin(θ) r ), where n i and n r These are the refractive indices of the optically denser and optically less dense media, respectively, θ i It is the angle of incidence, θ r It is the angle of refraction. When the angle of refraction (θ) r When θ equals 90 degrees, that is, sin(θ) r ) = 1, according to Snell's law, n i *sin(θ) i )=n r *1, i.e., sin(θ) i )=n r / n i This angle θ i This is the critical angle at which total internal reflection occurs. When the angle of incidence of light is greater than the critical angle, total internal reflection will occur; when the angle of incidence is less than the critical angle, refraction will occur.

[0059] In this embodiment, the critical angle for total internal reflection at the interface where the optical adjustment unit 33 and the filter unit 31 are in contact is β. In this embodiment, the first light-emitting unit 22a with the lowest luminous efficiency is configured such that the difference between the angle α1 between the side wall of the optical adjustment unit 33 facing the first filter unit 31a and the plane parallel to the direction of the substrate 10 and the critical angle β is minimized. That is, α1 is set to be closest to the critical angle β, so that when more light undergoes total internal reflection at the interface where the optical adjustment unit 33 and the first filter unit 31a are in contact, it will be emitted from the positive viewing angle. The light emission efficiency of the first light-emitting unit 22a at the positive viewing angle is improved the most, thereby reducing the power consumption of the display module 100.

[0060] In some embodiments, α1, α2, and α3 satisfy the following condition: |α1-α3|>|α1-α2|; wherein, the white light brightness ratio of the third light-emitting unit 22c is greater than the white light brightness ratio of the first light-emitting unit 22a and the second light-emitting unit 22b, respectively.

[0061] For example, the first light-emitting unit 22a is a blue light-emitting unit 22, the second light-emitting unit 22b is a red light-emitting unit 22, and the third light-emitting unit 22c is a green light-emitting unit 22. The white light brightness ratio of the third light-emitting unit 22c is the largest, for example, the white light brightness ratio of the third light-emitting unit 22c is 60%, while the white light brightness ratios of the first light-emitting unit 22a and the second light-emitting unit 22b are 20% each. Since the white light brightness ratio of the third light-emitting unit 22c is the highest, the difference between α1 and α3 is set to be greater than the difference between α1 and α2. This can be understood as the difference between α1 and the critical angle β for total internal reflection being the largest. Therefore, the proportion of light undergoing total internal reflection at the interface where the optical adjustment unit 33 contacts the third filter unit 32c is the lowest, so that the proportion of light emitted from the third light-emitting unit 22c at a large viewing angle is still relatively large, thereby ensuring that color shift is not easily generated when observing the display module 100 at a large viewing angle.

[0062] like Figure 7 As shown, in some embodiments, the light-emitting layer 20 further includes a pixel definition layer 50, which has a pixel opening 52, and the light-emitting unit 22 is located within the pixel opening 52. Specifically, the pixel definition layer 50 includes a pixel defining portion 51 and a pixel opening 52 formed by the pixel defining portion 51. The pixel definition layer 50 may include inorganic materials or polymer materials, such as inorganic materials like silicon oxide, silicon nitride, and silicon, or polymer materials like polyimide. Multiple light-emitting units 22 may be arranged in a one-to-one correspondence with multiple pixel openings 52, or a light-emitting unit 22 may be arranged in a correspondence with one pixel opening 52, thereby reducing the phenomenon of mutual interference between sub-pixels.

[0063] The orthographic projection of the optical adjustment unit 33 onto the substrate 10 is located within the orthographic projection range of the pixel definition layer 50 onto the substrate 10. That is, the edge of the optical adjustment unit 33 is located within the edge of the pixel definition layer 51, or the edge of the optical adjustment unit 33 is flush with the edge of the pixel definition layer 51. The optical adjustment unit 33 will not block the light-emitting unit 22, thereby not affecting the light emission of the light-emitting unit 22 at the orthographic viewing angle.

[0064] In some embodiments, the distance between the optical adjustment section 33 and the sidewall of the pixel opening 52 in a direction parallel to the substrate 10 is D, where D satisfies the following condition: 0μm≤D≤5μm.

[0065] It should be noted that "the distance between the optical adjustment section 33 and the side wall of the pixel opening 52" refers to the distance between the edge of the optical adjustment section 33 and the edge of the pixel limiting section 51. If D is too large, it will not be able to effectively convert and utilize more light from a wide viewing angle that would otherwise be absorbed by the light-shielding section 32, thus failing to improve luminous efficiency. In this embodiment, the distance D between the optical adjustment section 33 and the side wall of the pixel opening 52 is within a reasonable range, enabling more light from a wide viewing angle to be effectively converted and utilized, thereby improving luminous efficiency.

[0066] In some embodiments, the display module 100 further includes a protective layer 60 disposed on the side of the filter layer 30 away from the substrate 10. The protective layer 60 can prevent the filter layer 30 from being damaged by external factors, such as preventing scratches, wear and chemical corrosion on the surface of the filter layer 30, and extending the service life of the filter layer 30.

[0067] In some embodiments, the refractive index of the protective layer 60 is less than that of the filter portion; for example, an existing optical adhesive layer (OC) may be used.

[0068] In some embodiments, the optical adjustment unit 33 comprises an organic material. Exemplarily, the optical adjustment unit 33 can be made of materials such as organic polymers, fluoropolymers, etc., for example, polyimide, polymethyl methacrylate, etc. Since the optical adjustment unit 33 in this embodiment uses an organic material, it can form a thicker film layer, thus eliminating the need for additional film layers to elevate the optical adjustment unit 33 to form an interface with the filter unit 31. This allows for the conversion of some wide-angle light into positive-angle light, simplifying the process, saving the number of photomasks, and reducing costs. Furthermore, compared to the display module 100 which requires additional film layers to elevate the optical adjustment unit 33, this embodiment reduces light loss. In addition, using organic materials improves bending performance and avoids the problem of film peeling during bending, which affects the display effect.

[0069] like Figure 9 As shown, in some embodiments, the thickness of the optical adjustment part 33 is H, and H satisfies the following condition: 1.5μm≤H≤5μm, so as to ensure that the optical adjustment part 33 has a high thickness, which increases the area of ​​the contact interface between the optical adjustment part 33 and the filter part 31, so that more wide-angle light can undergo total internal reflection at the contact interface.

[0070] In some embodiments, the refractive index of the optical adjustment section 33 is n1, where n1 satisfies the condition that n1 ≤ 1.55. If the refractive index of the optical adjustment section 33 is too large, total internal reflection can only occur when the critical angle of incidence at the contact interface between the optical adjustment section 33 and the filter section 31 is very large. In this embodiment, n1 is set to n1 ≤ 1.55 to facilitate total internal reflection of light rays with a large viewing angle at the contact interface between the optical adjustment section 33 and the filter section 31.

[0071] Furthermore, 1.4 ≤ n1 ≤ 1.55. If the refractive index of the optical adjustment section 33 is too small, the range of materials that can be selected for the optical adjustment section 33 is limited. The refractive index range of the optical adjustment section 33 in this embodiment is reasonable, which ensures that the range of materials that can be selected for the optical adjustment section 33 is large, and also facilitates total internal reflection of light rays with a large viewing angle at the contact interface between the optical adjustment section 33 and the filter section 31. For example, n1 can be 1.4, 1.42, 1.45...1.5...1.55.

[0072] In some embodiments, the refractive index of the filter section 31 is n2, where n2 satisfies the condition that n2 ≥ 1.6. The large difference between the refractive index of the filter section 31 and the refractive index of the optical adjustment section 33 in this embodiment further facilitates total internal reflection of wide-angle light rays at the interface between the optical adjustment section 33 and the filter section 31. For example, n2 can be 1.6, 1.65, 1.68, 1.72…1.8…

[0073] like Figure 10 As shown, in some embodiments, the optical adjustment section 33 is disposed on the side of the light-shielding section 32 away from the substrate 10. The light-shielding section 32 can be fabricated first, and then the optical adjustment section 33 can be fabricated.

[0074] In some embodiments, the optical adjustment section 33 covers the side wall of the light-shielding section 32, which can increase the contact area between the optical adjustment section 33 and the filter section 31.

[0075] In some embodiments, the display module 100 further includes a touch layer 70 disposed between the light-emitting layer 20 and the filter layer 30. The touch layer 70 includes an insulating layer 71, and the optical adjustment part 33 is made of the same material as the insulating layer 71.

[0076] The touch layer 70 is a transparent layer used to receive user touch input. Located on top of the display panel, it enables touch interaction and input, allowing users to control the display device by directly touching the screen. The insulating layer 71 within the touch layer 70 isolates the touch input signal. When a user touches the screen, the touch input signal (such as electrical charge) is sensed and transmitted to the touch layer 70. Through its insulating properties, the insulating layer 71 confines the touch input signal to a specific area, preventing misconduction and interference. The presence of the insulating layer 71 also improves touch sensitivity by preventing excessive diffusion and leakage of the touch input signal, allowing the touch layer to more accurately detect and interpret the user's touch actions. In capacitive touchscreens, the insulating layer 71 also helps reduce mutual capacitance interference. When multiple touch points exist simultaneously, the insulating layer 71 prevents current interference between different touch areas, improving the accuracy and reliability of multi-touch. The insulating layer 71 also helps ensure the normal transmission of touch input signals by providing a reliable dielectric environment, preventing charge loss and leakage, and ensuring the touch layer can accurately sense and interpret touch input.

[0077] The optical adjustment section 33 in this embodiment is made of the same material as the insulating layer 71, which facilitates manufacturing and reduces costs.

[0078] like Figure 11 As shown, in some embodiments, the optical adjustment part 33 is disposed between the light-emitting layer 20 and the light-shielding part 32. The optical adjustment part 33 can be prepared first, and then the light-shielding part 32 can be prepared.

[0079] Preferably, the display module 100 further includes a touch layer 70 disposed between the light-emitting layer 20 and the filter layer 30, and the optical adjustment unit 33 is reused as the insulating layer 71 in the touch layer 70. When preparing the insulating layer 71 and the optical adjustment unit 33, a single mask can be used to prepare them using the same process and materials. Compared to preparing the insulating layer 71 and the optical adjustment unit 33 separately, this embodiment saves one mask, simplifies the process steps, reduces costs, and improves production efficiency.

[0080] like Figure 12 As shown, a second aspect of this application provides a method for manufacturing a display module 100, comprising the following steps: like Figure 13 As shown, in step S10, a light-emitting layer 20 is formed on one side of the substrate 10.

[0081] The light-emitting layer 20 includes multiple light-emitting units 22.

[0082] Please combine Figure 14 and Figure 15 S20, a light-shielding portion 32 and an optical adjustment portion 33 are formed on the side of the light-emitting layer 20 away from the substrate 10.

[0083] The light-shielding portion 32 and the optical adjustment portion 33 can be formed by photolithography. The range of the light-shielding portion 32 projected onto the substrate 10 is within the range of the optical adjustment portion 33 projected onto the substrate 10.

[0084] Please combine Figure 16 and Figure 17 S30, A filter portion 31 is formed on the side of the light-emitting layer 20 away from the substrate 10.

[0085] In this configuration, the orthographic projection of the filter section 31 onto the substrate 10 at least partially overlaps with the orthographic projection of the light-emitting unit 22 onto the substrate 10. At least one optical adjustment section 33 is located between adjacent filter sections 31, and the optical adjustment section 33 is at least partially in contact with the filter section 31. Furthermore, the refractive index of the optical adjustment section 33 is less than the refractive index of the filter section 31.

[0086] In summary, this embodiment utilizes color filter (CF) technology. By adding a low-refractive-index optical adjustment unit 33, which works in conjunction with the filter unit 31, a microlens array (MLA) can be formed. This transforms light from a wide viewing angle into a positive viewing angle, thereby improving the light extraction efficiency over a wide viewing angle and reducing the power consumption of the display module 100. Furthermore, by simply adding the low-refractive-index optical adjustment unit 33, a microlens array (MLA) can be formed without the need for additional high-refractive-index films, simplifying the process, reducing the number of photomasks, and lowering costs. Moreover, this embodiment only requires the optical adjustment unit 33, eliminating the need for additional films to form the microlens array, which also reduces light loss.

[0087] In some embodiments, the step of forming a light-shielding portion 32 and an optical adjustment portion 33 on the side of the light-emitting layer 20 facing away from the substrate 10 includes: forming a light-shielding portion 32 on the side of the light-emitting layer 20 facing away from the substrate 10; forming an optical adjustment portion 33 on the side of the light-shielding portion 32 facing away from the substrate 10; or, forming an optical adjustment portion 33 on the side of the light-emitting layer 20 facing away from the substrate 10; and forming a light-shielding portion 32 on the side of the optical adjustment portion 33 facing away from the substrate 10. That is, the order in which the light-shielding portion 32 and the optical adjustment portion 33 are fabricated is not limited.

[0088] In some embodiments, the step of forming a light-shielding portion 32 and an optical adjustment portion 33 on the side of the light-emitting layer 20 facing away from the substrate 10 includes: like Figure 18 As shown, in step S21, an electrode layer 72 of the touch layer 70 is formed on the side of the light-emitting layer 20 away from the substrate 10.

[0089] The electrode layer 72 includes multiple touch electrodes, which can be used to implement the touch function of the display module 100. In the mutual capacitance touch display module 100, the touch electrodes can be used as mutual capacitance touch electrodes, for example, as touch transmitting electrodes, receiving touch signals through touch signal lines, forming mutual capacitance with touch receiving electrodes, and determining the touch point by detecting changes in mutual capacitance. In the self-capacitance touch display module 100, the touch electrodes can be used as self-capacitance touch electrodes, receiving touch signals through touch signal lines, and transmitting the sensing signal generated by the change in self-capacitance when a touch point is detected to the touch detection circuit through the touch signal lines.

[0090] like Figure 19 As shown, S22, an optical adjustment section 33 is formed on the side of the electrode layer 72 away from the substrate 10.

[0091] In this embodiment, the optical adjustment section 33 is reused as the insulating layer 71 of the touch layer 70. A single mask can be used to prepare the layer using the same process and materials. Compared to preparing the insulating layer 71 and the optical adjustment section 33 separately, this embodiment saves one mask, simplifies the process, reduces costs, and improves production efficiency.

[0092] like Figure 20 As shown, in S23, a light-shielding portion 32 is formed on the side of the optical adjustment portion 33 away from the substrate 10.

[0093] A third aspect of this application provides a display device, including a display module 100 according to any of the above embodiments, or manufactured using the manufacturing method of any of the above embodiments. Since this display device employs all the technical solutions of all the above embodiments, it possesses at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be elaborated upon here.

[0094] The display device can be any device with display function, such as mobile devices such as mobile phones, tablets, laptops, handheld computers, in-vehicle electronic devices, wearable devices, ultra-mobile personal computers (UMPCs), netbooks, or personal digital assistants (PDAs), as well as non-mobile devices such as personal computers (PCs), televisions (TVs), ATMs, or self-service machines.

[0095] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in this application, and these modifications or substitutions should all be covered within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A display module, characterized in that, include: substrate; A light-emitting layer is disposed on one side of the substrate, and the light-emitting layer includes a plurality of light-emitting units; A filter layer is disposed on the side of the light-emitting layer opposite to the substrate. The filter layer includes a filter portion, a light-shielding portion, and an optical adjustment portion. The orthographic projection of the filter portion onto the substrate at least partially overlaps with the orthographic projection of the light-emitting unit onto the substrate. At least one optical adjustment portion is disposed between adjacent filter portions, and the optical adjustment portion is at least partially in contact with the filter portion. The refractive index of the optical adjustment portion is less than that of the filter portion. The range of the orthographic projection of the light-shielding portion onto the substrate is within the range of the orthographic projection of the optical adjustment portion onto the substrate. The optical adjustment section is disposed between the light-emitting layer and the light-shielding section, the edge of the optical adjustment section protrudes relative to the edge of the light-shielding section, and the filter section covers at least a portion of the protruding edge of the optical adjustment section relative to the light-shielding section; The light-emitting unit includes a first light-emitting unit, a second light-emitting unit, and a third light-emitting unit with different colors. The filter part includes a first filter part, a second filter part, and a third filter part. The orthographic projection of the first filter part on the substrate at least partially overlaps with the first light-emitting unit. The orthographic projection of the second filter part on the substrate at least partially overlaps with the second light-emitting unit. The orthographic projection of the third filter part on the substrate at least partially overlaps with the third light-emitting unit. Along a direction parallel to the substrate, the difference between the distance from the first filter portion to the edge of the optical adjustment portion and the distance from the first filter portion to the edge of the light-shielding portion is L1, the difference between the distance from the second filter portion to the edge of the optical adjustment portion and the distance from the second filter portion to the edge of the light-shielding portion is L2, and the difference between the distance from the third filter portion to the edge of the optical adjustment portion and the distance from the third filter portion to the edge of the light-shielding portion is L3. L1, L2, and L3 satisfy the following conditions: L1 > L2, L1 > L3; wherein, the luminous efficiency of the first light-emitting unit is less than the luminous efficiency of the second light-emitting unit and the third light-emitting unit, respectively.

2. The display module according to claim 1, characterized in that, The orthographic projection of the optical adjustment unit onto the substrate does not overlap with the orthographic projection of the light-emitting unit onto the substrate.

3. The display module according to claim 1, characterized in that, Along a direction parallel to the substrate, the difference between the distance from the edge of the filter section to the edge of the optical adjustment section and the distance from the filter section to the edge of the light-shielding section is L, and L satisfies the following condition: 3μm≤L≤6μm.

4. The display module according to claim 1, characterized in that, The first light-emitting unit is a blue light-emitting unit.

5. The display module according to claim 1, characterized in that, The L1, L2, and L3 satisfy the following condition: L1 > L2 > L3; wherein the white light brightness ratio of the third light-emitting unit is greater than the white light brightness ratio of the first light-emitting unit and the second light-emitting unit, respectively.

6. The display module according to claim 5, characterized in that, The third light-emitting unit is a green light-emitting unit.

7. The display module according to claim 1, characterized in that, The orthographic projection of the optical adjustment unit onto the substrate overlaps with the orthographic projection of the filter unit onto the substrate.

8. The display module according to claim 1, characterized in that, The angle between the sidewall of the optical adjustment section facing the filter section and the plane parallel to the substrate is α, and α satisfies the following condition: 60°≤α≤90°.

9. The display module according to claim 8, characterized in that, The α satisfies the following condition: 70°≤α≤80°.

10. The display module according to claim 1, characterized in that, The angle between the sidewall of the optical adjustment unit facing the first filter and the plane parallel to the substrate direction is α1; the angle between the sidewall of the optical adjustment unit facing the second filter and the plane parallel to the substrate direction is α2; and the angle between the sidewall of the optical adjustment unit facing the third filter and the plane parallel to the substrate direction is α3. α1, α2, and α3 satisfy the following condition: |α1-β| < |α2-β|, and |α1-β| < |α3-β|, where β is the critical angle for total internal reflection at the interface where the optical adjustment unit and the filter contact each other. The luminous efficiency of the first light-emitting unit is less than that of the second and third light-emitting units, respectively.

11. The display module according to claim 10, characterized in that, The α1, α2, and α3 satisfy the following condition: |α1-α3|>|α1-α2|; wherein, the white light brightness ratio of the third light-emitting unit is greater than the white light brightness ratio of the first light-emitting unit and the second light-emitting unit, respectively.

12. The display module according to claim 11, characterized in that, The third light-emitting unit is a green light-emitting unit.

13. The display module according to claim 1, characterized in that, The light-emitting layer further includes a pixel definition layer, which has a pixel opening. The light-emitting unit is located within the pixel opening, and the orthographic projection of the optical adjustment unit onto the substrate is located within the orthographic projection of the pixel definition layer onto the substrate.

14. The display module according to claim 13, characterized in that, Along a direction parallel to the substrate, the distance between the optical adjustment part and the sidewall of the pixel opening is D, and D satisfies the following condition: 0μm≤D≤5μm.

15. The display module according to claim 1, characterized in that, The optical adjustment unit comprises organic materials.

16. The display module according to claim 15, characterized in that, The thickness of the optical adjustment part is H, and H satisfies the following condition: 1.5μm≤H≤5μm.

17. The display module according to claim 15, characterized in that, The refractive index of the optical adjustment part is n1, and n1 satisfies the following condition: n1≤1.

55.

18. The display module according to claim 17, characterized in that, The n1 satisfies the following condition: 1.4≤n1≤1.

55.

19. The display module according to claim 15, characterized in that, The optical adjustment unit includes at least one of polyimide and polymethyl methacrylate.

20. The display module according to claim 1, characterized in that, The refractive index of the filter is n2, and n2 satisfies the following condition: n2≥1.

6.

21. The display module according to claim 1, characterized in that, The display module further includes a protective layer disposed on the side of the filter layer facing away from the substrate, wherein the refractive index of the protective layer is less than the refractive index of the filter layer.

22. The display module according to claim 1, characterized in that, The display module further includes a touch layer disposed between the light-emitting layer and the filter layer, and the optical adjustment unit is reused as an insulating layer in the touch layer.

23. A method for manufacturing a display module, characterized in that, Includes the following steps: A light-emitting layer is formed on one side of a substrate; wherein the light-emitting layer includes a plurality of light-emitting units; A light-shielding portion and an optical adjustment portion of a filter layer are formed on the side of the light-emitting layer opposite to the substrate; wherein the range of the light-shielding portion projected onto the substrate is within the range of the optical adjustment portion projected onto the substrate. A filter portion of the filter layer is formed on the side of the light-emitting layer opposite to the substrate; wherein the orthographic projection of the filter portion on the substrate at least partially overlaps with the orthographic projection of the light-emitting unit on the substrate, at least one optical adjustment portion is located between adjacent filter portions, the optical adjustment portion is at least partially in contact with the filter portion, and the refractive index of the optical adjustment portion is less than the refractive index of the filter portion; The optical adjustment section is disposed between the light-emitting layer and the light-shielding section, the edge of the optical adjustment section protrudes relative to the edge of the light-shielding section, and the filter section covers at least a portion of the protruding edge of the optical adjustment section relative to the light-shielding section; The light-emitting unit includes a first light-emitting unit, a second light-emitting unit, and a third light-emitting unit with different colors. The filter part includes a first filter part, a second filter part, and a third filter part. The orthographic projection of the first filter part on the substrate at least partially overlaps with the first light-emitting unit. The orthographic projection of the second filter part on the substrate at least partially overlaps with the second light-emitting unit. The orthographic projection of the third filter part on the substrate at least partially overlaps with the third light-emitting unit. Along a direction parallel to the substrate, the difference between the distance from the first filter portion to the edge of the optical adjustment portion and the distance from the first filter portion to the edge of the light-shielding portion is L1, the difference between the distance from the second filter portion to the edge of the optical adjustment portion and the distance from the second filter portion to the edge of the light-shielding portion is L2, and the difference between the distance from the third filter portion to the edge of the optical adjustment portion and the distance from the third filter portion to the edge of the light-shielding portion is L3. L1, L2, and L3 satisfy the following conditions: L1 > L2, L1 > L3; wherein, the luminous efficiency of the first light-emitting unit is less than the luminous efficiency of the second light-emitting unit and the third light-emitting unit, respectively.

24. The preparation method according to claim 23, characterized in that, The step of forming a light-shielding portion and an optical adjustment portion on the side of the light-emitting layer opposite to the substrate includes: An optical adjustment section is formed on the side of the light-emitting layer opposite to the substrate; A light-shielding portion is formed on the side of the optical adjustment portion that is away from the substrate; or, An electrode layer for a touch layer is formed on the side of the light-emitting layer opposite to the substrate; An optical adjustment section is formed on the side of the electrode layer opposite to the substrate; wherein the optical adjustment section is reused as the insulating layer of the touch layer; A light-shielding portion is formed on the side of the optical adjustment portion that is away from the substrate.

25. A display device, characterized in that, This includes the display module according to any one of claims 1 to 22, or the display module formed by the preparation method according to claim 23 or 24.

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