Display module, preparation method thereof and display device

Abstract

The application provides a display module, a preparation method thereof and a display device. The display module comprises a screen body with a light-emitting surface, a polaroid, an optical adhesive layer and a cover plate which are sequentially stacked on the screen body. The screen body comprises an opening area with a first through hole. The polaroid is provided with a circular truncated cone-shaped second through hole which is communicated with the first through hole. The optical adhesive layer is provided with a circular truncated cone-shaped third through hole which is communicated with the second through hole. The cover plate covers the third through hole. The first through hole, the second through hole and the third through hole are communicated to form a camera hole. The aperture area of one end of the camera hole close to the optical adhesive layer is smaller than that of the other end. The included angle between the generatrix of the second through hole and the axis of the second through hole and the included angle between the generatrix of the third through hole and the axis of the third through hole are both greater than 0° and less than 90°. The application improves the light leakage phenomenon of the camera hole edge position arranged in the display screen and improves the picture display effect at the camera hole edge position.

Description

Technical Field

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

[0002] With the increasing popularity and development of smartphones, photography has become a standard feature. Typically, a camera hole is set within the display screen to house one or more cameras. Due to reflection, some light emitted from the screen easily leaks through the edge of the camera hole, affecting the image display quality at that area. To improve this, existing technology places a light-shielding layer on the surface of the cover plate facing the polarizer. This layer covers the edge of the camera hole and can be considered as the camera's bezel. However, to improve the overall aesthetics of the display, camera bezels are becoming narrower, thus reducing the light-shielding effect of the layer and exacerbating light leakage, further affecting the image display quality at the camera's edge. Summary of the Invention

[0003] This application provides a display module and its manufacturing method, as well as a display device, which solves the problem of increased light leakage at the edge of the camera hole in existing displays, affecting the image display effect at the edge of the camera hole.

[0004] This invention is implemented as follows: a display module includes a screen body, a polarizer, an optical adhesive layer, and a cover plate. The screen body includes an opening area with a first through-hole penetrating the screen body, and the screen body has a light-emitting surface. The polarizer is disposed on the light-emitting surface of the screen body, and a frustum-shaped second through-hole penetrating the polarizer is formed on the polarizer, the second through-hole connecting to the first through-hole. The optical adhesive layer is disposed on the side surface of the polarizer facing away from the screen body, and a frustum-shaped second through-hole penetrating the optical adhesive layer is formed on the optical adhesive layer. A three-way hole, wherein the third through hole connects to the second through hole; a cover plate is bonded to the optical adhesive layer and covers the third through hole; the first through hole, the second through hole, and the third through hole are interconnected to form a camera hole, wherein the aperture area of ​​the camera hole at the end near the optical adhesive layer is smaller than the aperture area at the end near the screen body; the angle between the generatrix of the second through hole and the axis of the second through hole is greater than 0° and less than 90°; the angle between the generatrix of the third through hole and the axis of the third through hole is greater than 0° and less than 90°.

[0005] In one embodiment, the camera hole is a frustum-shaped hole, and the angle between the generatrix of the camera hole and the axis of the camera hole is greater than 0° and less than 90°.

[0006] In one embodiment, the angle between the generatrix of the camera hole and the axis of the camera hole is greater than 0° and less than or equal to a preset angle;

[0007] Wherein, the preset angle is C-θ, where C refers to the critical angle of incidence of light that produces total internal reflection when the light emitted from the light-emitting surface enters the camera hole, and θ refers to the minimum value of the angle between the light emitted from the light-emitting surface (103) and the light-emitting surface (103).

[0008] In one embodiment, the angle between the generatrix of the camera hole and the axis of the camera hole is greater than a preset angle and less than 90°;

[0009] Wherein, the preset angle is C-θ, where C refers to the critical angle of incidence of light that produces total internal reflection when the light emitted from the light-emitting surface enters the camera hole, and θ refers to the minimum value of the angle between the light emitted from the light-emitting surface (103) and the light-emitting surface (103).

[0010] In one embodiment, the cover plate has an annular light-shielding portion on one side surface facing the optical adhesive layer, and the orthographic projection of the annular light-shielding portion on the optical adhesive layer covers the edge of the camera hole.

[0011] In one embodiment, the central axis of the annular light-shielding portion coincides with the axis of the camera hole.

[0012] In one embodiment, the material of the annular light-shielding part is light-shielding tape or ink.

[0013] This application also provides a method for manufacturing a display module, used to manufacture the display module as described in the above embodiments, including:

[0014] A screen body is prepared, the screen body including an opening area;

[0015] A polarizer is disposed on the screen body;

[0016] An optical adhesive layer is formed on the polarizer;

[0017] The optical adhesive layer, the polarizer, and the opening area are cut to form a frustum-shaped camera hole that passes through the optical adhesive layer, the polarizer, and the screen body; wherein the area of ​​the camera hole at the end near the optical adhesive layer is smaller than the area of ​​the end near the screen body.

[0018] In one embodiment, cutting the optical adhesive layer, the polarizer, and the opening area to form a frustum-shaped camera hole penetrating the optical adhesive layer, the polarizer, and the screen body includes:

[0019] A laser is used to integrally cut the optical adhesive layer, the polarizer, and the opening area at a preset cutting angle to form a frustum-shaped camera hole that runs through the optical adhesive layer, the polarizer, and the screen.

[0020] Wherein, the preset cutting angle is greater than 0° and less than 90°, and the area of ​​the camera hole at the end near the optical adhesive layer is smaller than the area of ​​the hole at the end near the screen.

[0021] This application also provides a display device, including a display module as described in any of the above embodiments.

[0022] The beneficial effects of the display module, its manufacturing method, and the display device provided in this application are as follows: Compared with the prior art, this application sets the angle between the generatrix of the second through hole and the axis of the second through hole to be greater than 0° and less than 90°, and also sets the angle between the generatrix of the third through hole and the axis of the third through hole to be greater than 0° and less than 90°. That is, the end faces of the polarizer and the optical adhesive layer that are formed by the openings are tilted relative to the thickness direction of the screen body. Since the light emitted from the screen body will be directed towards the end faces of the polarizer and the optical adhesive layer that are formed by the second through hole, and then a portion of the light will be refracted into the camera hole and emitted from the opening of the camera hole, causing light leakage from the camera hole and affecting the display effect of the opening area. Therefore, tilting the end faces can reduce the proportion of light refracted on the end faces of the polarizer and the optical adhesive layer that are formed by the second through hole, thereby reducing the light leakage rate of the end faces of the polarizer and the optical adhesive layer, improving the light leakage phenomenon in the opening area, and reducing the impact on the image display in the opening area. Attached Figure Description

[0023] Figure 1 This is a structural diagram of a display module in the prior art;

[0024] Figure 2 This is a schematic diagram of the optical path of total internal reflection in a display module using existing technology;

[0025] Figure 3 This is a schematic diagram of the structure of the display module provided in the embodiment of this application;

[0026] Figure 4 This is a top view of the display module provided in the embodiment of this application;

[0027] Figure 5 This is a schematic diagram of the optical path of the display module provided in the embodiments of this application. Figure 1 ;

[0028] Figure 6 This is a schematic diagram of the optical path of the display module provided in the embodiments of this application. Figure 2;

[0029] Figure 7 This is a schematic diagram of the optical path of the display module provided in the embodiments of this application. Figure 3 ;

[0030] Figure 8 This is a schematic diagram of the optical path of the display module provided in the embodiments of this application. Figure 4 ;

[0031] Figure 9 This is a schematic diagram of the optical path of the display module provided in the embodiments of this application. Figure 5 ;

[0032] Figure 10 This is a flowchart of the manufacturing method of the display module provided in the embodiments of this application;

[0033] Figure 11 This is a flowchart of another method for manufacturing a display module provided in the embodiments of this application;

[0034] Figure 12 This is a schematic diagram of the structure of the display device provided in the embodiments of this application.

[0035] Reference numerals: 10, screen body; 101, opening area; 102, first through hole; 103, light-emitting surface; 20, polarizer; 201, second through hole; 30, optical adhesive layer; 301, third through hole; 40, cover plate; 50, camera hole; 60, annular light-shielding part; 70, support film; 100, display module. Detailed Implementation

[0036] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0037] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0038] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They 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. Therefore, they should not be construed as limitations on this application.

[0039] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0040] It should also be noted that in the embodiments of this application, the same reference numerals are used to represent the same component or part. For the same part in the embodiments of this application, the reference numerals may only be used to mark one part or component as an example. It should be understood that the reference numerals are also applicable to other identical parts or components.

[0041] With the development of display panels, people are no longer satisfied with just the conventional performance indicators such as large size and high definition; they also have more diverse requirements for display panels. Display devices with high screen-to-body ratios can bring users a brand-new feeling and experience, thus gaining popularity. Currently, display devices on the market generally place the camera in the non-display area, thereby increasing the area of ​​the non-display area, resulting in a reduced display area and a lower screen-to-body ratio, which is not conducive to users obtaining a good visual experience.

[0042] Therefore, in order to increase the screen-to-body ratio of display devices, full-screen display devices have gradually emerged on the market. These devices involve punching holes in the display panel in the area corresponding to cameras and other components, thus providing mounting space for these devices. However, if the punching is not handled properly, it can easily lead to light leakage from the inner wall of the hole, causing bright lines in the area corresponding to the camera and affecting the user experience. At the same time, the leaked light can enter the camera, affecting its shooting performance.

[0043] refer to Figure 1 To prevent light leakage in the perforated area of ​​the display device and to ensure the display quality, existing technologies typically create through holes 2 in the area of ​​the display panel 1 corresponding to devices such as cameras. The angle between the inner wall of the through hole 2 and the thickness direction of the display panel 1 is 0°, meaning that the through hole 2 is a straight hole. Then, a light-shielding material 4 is placed on the surface of the top cover plate 3 attached to the display panel 1 facing the display panel 1. The light-shielding material 4 covers the edge of the through hole 2. In this way, the light emitted from the display panel 1 is directed towards the inner wall of the through hole 2 and then refracted into the through hole 2. When the light shines from the opening of the through hole 2 onto the top cover plate 3, it will be blocked by the light-shielding material 4.

[0044] While covering the edge of the through hole 2, the light-shielding material 4 also covers part of the opening of the through hole 2. The larger the area of ​​the opening of the through hole 2 covered by the light-shielding material 4, the more it can reduce the light leakage phenomenon on the inner wall of the through hole 2. However, this will widen the bezel of the camera and other devices installed in the through hole 2, which is not conducive to the overall aesthetics of the display device. If the area occupied by the light-shielding material 4 is reduced, the light leakage phenomenon on the inner wall of the through hole 2 will become more serious, affecting the display effect of the screen in the hole area of ​​the display panel 1 and affecting the shooting performance of the camera.

[0045] To address the aforementioned issues, this application provides a display module, its manufacturing method, and a display device, which solves the problem of increased light leakage at the edge of the camera hole in existing displays, affecting the image display effect at the edge of the camera hole.

[0046] refer to Figure 3 and Figure 4 The display module 100 provided in this application embodiment includes a screen body 10, a polarizer 20, an optical adhesive layer 30, and a cover plate 40; the screen body 10 has a light-emitting surface 103, the polarizer 20 is disposed on the light-emitting surface 103 of the screen body 10, the optical adhesive layer 30 is disposed on the side surface of the polarizer 20 facing away from the screen body 10, and the cover plate 40 is bonded to the optical adhesive layer 30.

[0047] The screen body 10 includes an opening area 101, with a first through hole 102 penetrating the screen body 10; a frustum-shaped second through hole 201 penetrating the polarizer 20 and connecting to the first through hole 102; a frustum-shaped third through hole 301 penetrating the optical adhesive layer 30 and connecting to the second through hole 201; a cover plate 40 covering the third through hole 301; the first through hole 102, the second through hole 201, and the third through hole 301 interconnect to form a camera hole 50, with the aperture area of ​​the end of the camera hole 50 near the optical adhesive layer 30 being smaller than the aperture area of ​​the end near the screen body 10; the angle between the generatrix of the second through hole 201 and the axis of the second through hole 201 is greater than 0° and less than 90°; the angle between the generatrix of the third through hole 301 and the axis of the third through hole 301 is greater than 0° and less than 90°.

[0048] In this embodiment, the angle between the generatrix of the second through-hole 201 and the axis of the second through-hole 201 is set to be greater than 0° and less than 90°, and the angle between the generatrix of the third through-hole 301 and the axis of the third through-hole 301 is also set to be greater than 0° and less than 90°. That is, the end faces of the polarizer 20 and the optical adhesive layer 30 formed by the openings are inclined relative to the thickness direction of the screen body 10. Since the light emitted from the screen body 10 will be directed towards the end face of the polarizer 20 with the second through-hole 201 and the end face of the optical adhesive layer 30 with the third through-hole 301, a portion of the light will be refracted to... Light leaks from the camera hole 50 and out of the opening of the camera hole 50, causing light leakage in the camera hole 50 and affecting the display effect of the opening area 101. Therefore, tilting the end face can reduce the proportion of light refracted on the end face of the polarizer 20 with the second through hole 201 and the end face of the optical adhesive layer 30 with the third through hole 301, thereby reducing the light leakage rate of the end face of the polarizer 20 with the second through hole 201 and the end face of the optical adhesive layer 30 with the third through hole 301, improving the light leakage phenomenon in the opening area 101, and reducing the impact on the image display of the opening area 101.

[0049] It is understandable that the screen 10 is used to display images, and the screen 10 contains data lines for transmitting signals. To prevent damage to the data lines inside the screen 10 when the first through-hole 102 is opened through the screen 10, an opening area 101 can be set during the manufacturing of the screen 10. There are no data lines arranged in the area corresponding to the opening area 101 inside the screen 10. Therefore, opening the first through-hole 102 in the opening area 101 of the screen 10 will not damage the data lines inside the screen 10 and will not affect the normal display of images by the screen 10. The opening area 101 here does not only refer to a part of the light-emitting surface 103 of the screen 10, but refers to a part of the entire screen 10, including a part inside the screen 10.

[0050] The main reason for light leakage in the camera hole 50 in this embodiment is that the light emitted from the screen 10 will be directed towards the end face of the polarizer 20 with the second through hole 201 and the end face of the optical adhesive layer 30 with the third through hole 301. Then, some of the light will be refracted into the camera hole 50 and emitted from the opening of the camera hole 50. Therefore, it is only necessary to design the second through hole 201 and the third through hole 301 as frustum shapes. As for the first through hole 102 opened in the opening area 101 of the screen 10, it can be set to any shape, such as frustum shape, cylinder shape, or prism shape.

[0051] In some embodiments, reference Figure 3 and Figure 4The camera hole 50 is a frustum-shaped hole, and the angle between the generatrix of the camera hole 50 and the axis of the camera hole 50 is greater than 0° and less than 90°. That is, the first through hole 102 is set as a frustum-shaped hole, and the sidewalls of the first through hole 102, the second through hole 201 and the third through hole 301 are flush with each other.

[0052] It should be noted that the first through hole 102, the second through hole 201 and the third through hole 301 are interconnected to form a frustum-shaped camera hole 50, which means that the first through hole 102, the second through hole 201 and the third through hole 301 are all frustum-shaped. At this time, the two ends of the first through hole 102 have different opening areas. In order to prevent part of the first through hole 102 from exceeding the opening area 101 and damaging the data lines inside the screen 10, when the first through hole 102 is opened in the opening area 101, it is necessary to ensure that both ends of the first through hole 102 are located within the opening area 101, that is, the entire first through hole 102 is located within the opening area 101.

[0053] It should be noted that the first through hole 102, the second through hole 201, and the third through hole 301 are interconnected to form the camera hole 50. Therefore, the sidewalls of the first through hole 102, the second through hole 201, and the third through hole 301 are flush with each other, and the inclination angle of the generatrix of each of the first through hole 102, the second through hole 201, and the third through hole 301 relative to the axis is the same. This ensures that the hole wall of the camera hole 50 remains smooth, which is beneficial for the installation of devices such as cameras, and also facilitates the simultaneous creation of the first through hole 102, the second through hole 201, and the third through hole 301 to form the camera hole 50.

[0054] Understandably, reference Figure 1 and Figure 2 , Figure 1 and Figure 2 The camera hole 50 is a straight hole. The end face of the polarizer 20 with its second through hole 201 and the end face of the optical adhesive layer 30 with its third through hole 301 are both perpendicular to the thickness direction of the screen body 10. When light emitted from the screen body 10 shines on the inner wall of the camera hole 50, some light is refracted into the camera hole 50, resulting in light leakage as it exits through the opening of the camera hole 50. Other light undergoes total internal reflection and shines back into the polarizer 20 or the optical adhesive layer 30, preventing light leakage as it exits through the opening of the camera hole 50. (Note: The reference is missing from the original text.) Figure 2 Taking a point O on the light-emitting surface 103 of the screen 10 as an example, the light emitted from this point O will be emitted in all directions. Only light emitted within an angle A will undergo total internal reflection on the inner wall of the camera hole 50. That is, only light within an angle A will not leak out of the opening of the camera hole 50. The minimum incident angle for total internal reflection of light on the inner wall of the camera hole 50 is set as α. According to... Figure 2It can be calculated that A equals 90° - a.

[0055] refer to Figure 5 , Figure 5 The camera hole 50 is a frustum-shaped hole, and the area of ​​the end of the camera hole 50 near the optical adhesive layer 30 is larger than the area of ​​the end of the camera hole 50 near the screen body 10. The end face of the polarizer 20 with the second through hole 201 and the end face of the optical adhesive layer 30 with the third through hole 301 are both inclined relative to the thickness direction of the screen body 10. When the light emitted from the screen body 10 shines on the inner wall of the camera hole 50, some of the light will be refracted into the camera hole 50, thus causing light leakage from the opening of the camera hole 50. Other light will undergo total internal reflection and shine into the polarizer 20 or the optical adhesive layer 30, without causing light leakage from the opening of the camera hole 50. (Refer to...) Figure 5 Taking a point O on the light-emitting surface 103 of the screen 10 as an example, the light emitted from this point O will be emitted in all directions. Only light emitted within an angle A will undergo total internal reflection on the inner wall of the camera hole 50. That is, only light within an angle A will not leak out of the opening of the camera hole 50. The minimum incident angle for total internal reflection of light on the inner wall of the camera hole 50 is set as α. According to... Figure 5 It can be calculated that A equals 90° - a + b, where b is the angle of inclination of the inner wall of the camera hole 50 relative to the thickness direction of the screen body 10, that is, b is the angle between the generatrix of the camera hole 50 and the axis of the camera hole 50.

[0056] It can be seen that, Figure 2 The value of A in the value is less than Figure 5 The value of A in the text is... Figure 5 The angle range of the light rays that will be totally internalized on the inner wall of the camera aperture 50 is greater than Figure 2 The angle range of light that will be totally internalized on the inner sidewall of the camera hole 50 is increased compared to the prior art where the sidewall of the camera hole 50 is set perpendicular to the thickness direction of the screen body 10. In this embodiment, the sidewall of the camera hole 50 is set to be inclined relative to the thickness direction of the screen body 10. This can increase the angle range of light that will be totally internalized on the inner sidewall of the camera hole 50, thereby reducing the angle range of light that will be refracted on the inner sidewall of the camera hole 50. This reduces the amount of light refracted into the camera hole 50 and the amount of light leaking out from the opening of the camera hole 50, effectively improving the light leakage phenomenon that occurs at the opening of the camera hole 50.

[0057] In this embodiment, the cover plate 40 is bonded to the optical adhesive layer 30, and no holes are drilled on the cover plate 40 at the position corresponding to the camera hole 50. This can better protect the camera and other photosensitive devices from interference from external moisture and oxygen, and at the same time, it can also provide physical protection for the screen 10.

[0058] In some embodiments, the angle between the generatrix of the camera aperture 50 and the axis of the camera aperture 50 is greater than 0° and less than or equal to a preset angle; wherein, the preset angle is C-θ, where C refers to the critical angle of incidence of light that produces total internal reflection when the light emitted from the light-emitting surface 103 enters the camera aperture 50, and θ refers to the minimum value of the angle between the light emitted from the light-emitting surface 103 and the light-emitting surface 103.

[0059] As we can understand, total internal reflection (TIR) ​​refers to the phenomenon where light only undergoes reflection and not refraction during propagation. When light travels from a medium with a higher refractive index to a medium with a lower refractive index, if the angle of incidence is greater than a certain critical angle (when the light ray moves away from the normal), the refracted ray will disappear, and all incident rays will be reflected and will not enter the medium with the lower refractive index. If the angle of incidence equals a certain critical angle, the angle of refraction is 90°, and total internal reflection will occur at the interface between the medium with the higher refractive index and the medium with the lower refractive index.

[0060] In this embodiment, when some of the light emitted from the light-emitting surface 103 enters the camera aperture 50, total internal reflection occurs on the inner wall of the camera aperture 50. At this point, the incident angle of the totally internalized light is greater than the critical angle. The preset angle is set to be equal to C-θ, and the angle between the generatrix of the camera aperture 50 and its axis is set to be greater than 0° and less than or equal to the preset angle. Thus, a portion of the light emitted from the light-emitting surface 103 will still be refracted on the inner wall of the camera aperture 50, and a portion of the light will exit along the inner wall of the camera aperture 50. However, compared to the prior art… The angle between the generatrix of the camera hole 50 and the axis of the camera hole 50 is set to 0°. The structure of the camera hole 50 provided in this embodiment can increase the proportion of light that undergoes total internal reflection on the inner wall of the camera hole 50, which means it will reduce the proportion of light that is refracted on the inner wall of the camera hole 50. This reduces the amount of light refracted into the camera hole 50 and the amount of light leaking out from the opening of the camera hole 50, effectively improving the light leakage phenomenon that occurs at the opening of the camera hole 50, reducing the impact on the image display of the opening area 101, and also reducing the impact on the shooting effect of the camera.

[0061] It should be noted that, within the range of 0° to the preset angle, the larger the angle between the generatrix of the camera hole 50 and the axis of the camera hole 50, the larger the angle of inclination of the end face of the polarizer 20 with the second through hole 201 and the end face of the optical adhesive layer 30 with the third through hole 301 relative to the thickness direction of the screen body 10. As a result, the proportion of light that undergoes total internal reflection on the inner wall of the camera hole 50 is greater, the proportion of light that is refracted on the inner wall of the camera hole 50 is smaller, the amount of light refracted into the camera hole 50 is less, and the amount of light leaking out of the opening of the camera hole 50 is less, thus improving the light leakage phenomenon at the opening of the camera hole 50.

[0062] In some embodiments, the angle between the generatrix of the camera aperture 50 and the axis of the camera aperture 50 is greater than a preset angle and less than 90°; wherein, the preset angle is C-θ, C refers to the critical angle of incidence of light that produces total internal reflection when the light emitted from the light-emitting surface 103 enters the camera aperture 50, and θ refers to the minimum value of the angle between the light emitted from the light-emitting surface (103) and the light-emitting surface (103).

[0063] It should be noted that when some of the light emitted from the light-emitting surface 103 in this embodiment enters the camera hole 50, total internal reflection will occur on the inner wall of the camera hole 50. At this time, the incident angle of the light that produces total internal reflection is greater than the critical angle. The preset angle is set to be equal to C-θ, and the angle between the generatrix of the camera hole 50 and the axis of the camera hole 50 is set to be greater than the preset angle and less than 90°. In this way, all the light emitted from the light-emitting surface 103 will undergo total internal reflection on the inner wall of the camera hole 50, so that no light will be refracted into the camera hole 50 and no light will leak out from the opening of the camera hole 50. This effectively avoids the phenomenon of light leakage at the opening of the camera hole 50, and will not affect the image display effect of the opening area 101 or the shooting effect of the camera.

[0064] In this embodiment, depending on the light-emitting chip used in the screen 10, the minimum angle between the light emitted by the light-emitting surface 103 and the light-emitting surface can be various. For example, it can be 0°, that is, the light-emitting surface 103 can emit light in a direction perpendicular to the axis of the camera hole 50. Of course, it can also be greater than 0°.

[0065] When θ is 0°, reference Figure 6 , Figure 6 Among the multiple light rays incident from the light source O towards the camera aperture 50, the light ray incident along the direction perpendicular to the axis of the camera aperture 50 has the smallest angle of incidence. If the light ray incident along the direction perpendicular to the axis of the camera aperture 50 can undergo total internal reflection at the inner wall of the camera aperture 50, then... Figure 6Each of the multiple light rays emitted from the light-emitting point O towards the camera aperture 50 can undergo total internal reflection on the inner wall of the camera aperture 50. Therefore, in this embodiment, the incident angle of the light rays emitted into the camera aperture 50 along a direction perpendicular to the axis of the camera aperture 50 can be set to be greater than the critical angle. Thus, the light rays emitted into the camera aperture 50 along a direction perpendicular to the axis of the camera aperture 50 can undergo total internal reflection on the inner wall of the camera aperture 50, thereby... Figure 6 Each of the multiple rays of light emitted from the light source O toward the camera aperture 50 can undergo total internal reflection on the inner wall of the camera aperture 50.

[0066] Based on this, refer to Figure 7 Taking the light path diagram of total internal reflection of light rays incident on the inner wall of the camera aperture 50 along a direction perpendicular to the axis of the camera aperture 50 as an example, it can be concluded that the angle between the generatrix of the camera aperture 50 and the axis of the camera aperture 50 is the angle of incidence of light rays incident on the camera aperture 50 along a direction perpendicular to the axis of the camera aperture 50. Therefore, the range of values ​​for the angle between the generatrix of the camera aperture 50 and the axis of the camera aperture 50 is equivalent to the range of values ​​for the angle of incidence of light rays incident on the camera aperture 50 along a direction perpendicular to the axis of the camera aperture 50. The range of values ​​for the angle of incidence of light rays incident on the camera aperture 50 along a direction perpendicular to the axis of the camera aperture 50 is 0°-90°. When the value is between 0° and the critical angle, the light rays incident on the camera aperture 50 along a direction perpendicular to the axis of the camera aperture 50 cannot undergo total internal reflection on the inner wall of the camera aperture 50. When the value is between the critical angle and 90°... Figure 7 Each of the multiple rays of light emitted from the light-emitting point O toward the camera hole 50 can undergo total internal reflection on the inner wall of the camera hole 50. Therefore, in this embodiment, the angle between the generatrix of the camera hole 50 and the axis of the camera hole 50 can be greater than 0° and less than or equal to a preset angle, or it can be greater than the preset angle and less than 90°.

[0067] When θ is greater than 0°, refer to Figure 8 , Figure 8 Among the multiple light rays incident from the light-emitting point O onto the camera aperture 50, the ray with an angle θ between it and the light-emitting surface 103 has the smallest angle of incidence. If the ray with an angle θ between it and the light-emitting surface 103 can undergo total internal reflection on the inner wall of the camera aperture 50, then... Figure 6 Each of the multiple light rays emitted from the light-emitting point O towards the camera aperture 50 can undergo total internal reflection on the inner wall of the camera aperture 50. Therefore, in this embodiment, the incident angle of the light ray with an angle θ between it and the light-emitting surface 103 can be set to be greater than the critical angle. Thus, the light ray with an angle θ between it and the light-emitting surface 103 can undergo total internal reflection on the inner wall of the camera aperture 50, thereby... Figure 6Each of the multiple rays of light emitted from the light source O toward the camera aperture 50 can undergo total internal reflection on the inner wall of the camera aperture 50.

[0068] Based on this, refer to Figure 9 Taking the light path diagram of a ray with an angle θ between itself and the light-emitting surface 103, resulting in total internal reflection on the inner wall of the camera aperture 50 as an example, it can be concluded that the angle between the generatrix of the camera aperture 50 and its axis is equal to the incident angle of the ray with an angle θ between itself and the light-emitting surface 103 minus θ. Therefore, the range of the angle between the generatrix of the camera aperture 50 and its axis is equivalent to the range of the incident angle of the ray with an angle θ between itself and the light-emitting surface 103 minus θ. The range of the incident angle of the ray with an angle θ between itself and the light-emitting surface 103 is θ-90°. When the value is between θ and the critical angle, the ray with an angle θ between itself and the light-emitting surface 103 cannot produce total internal reflection on the inner wall of the camera aperture 50. When the value is between the critical angle and 90°, ... Figure 9 Each of the multiple rays of light emitted from the light-emitting point O toward the camera hole 50 can undergo total internal reflection on the inner wall of the camera hole 50. Therefore, in this embodiment, the angle between the generatrix of the camera hole 50 and the axis of the camera hole 50 can be greater than 0° and less than or equal to a preset angle, or it can be greater than the preset angle and less than 90°.

[0069] In this embodiment, the angle between the generatrix of the camera hole 50 and the axis of the camera hole 50 can be set to a value between 0° and a preset angle, or it can be set to a value between the preset angle and 90°. Regardless of which value is selected, the light refracted into the camera hole 50 can be reduced, and the light leaking out from the opening of the camera hole 50 can be reduced. This effectively improves the light leakage phenomenon at the opening of the camera hole 50, reduces the impact on the image display in the opening area 101, and also reduces the impact on the shooting effect of the camera.

[0070] When actually manufacturing the display module 100, a preset angle needs to be calculated to facilitate the opening of the camera hole 50. In this embodiment, the preset angle is C-θ, where C refers to the critical angle of incidence of light that is smaller than the angle at which total internal reflection occurs when light emitted from the light-emitting surface 103 enters the camera hole 50, and θ refers to the minimum angle between the light emitted from the light-emitting surface 103 and the light-emitting surface 103. Since it is related to the performance of the light-emitting chip inside the screen 10, it should be a definite value. Therefore, calculating the preset angle is equivalent to calculating the critical angle. The specific calculation method of the critical angle is as follows:

[0071] The law of refraction of light is: sini / sinr = n2 / n1, where i is the angle of incidence, r is the angle of refraction, n1 is the refractive index of the optically denser medium, and n2 is the refractive index of the optically rarer medium. The critical angle is the angle of incidence at which the angle of refraction is 90°. Therefore, the formula for calculating the critical angle is sinC = sini = sin90°(n2 / n1), or sinC = n2 / n1. Here, C refers to the critical angle.

[0072] It is known that the specific value of the critical angle is related to the refractive index of the medium through which light is transmitted. In this embodiment, the screen 10 and the polarizer 20 are made of glass material with a refractive index of approximately 1.5. The optical adhesive layer 30 is made of a material with a refractive index of approximately 1.5. The medium inside the camera hole 50 is air with a refractive index of approximately 1.

[0073] refer to Figure 7 Since the light emitted from the light-emitting surface 103 of the screen 10 will illuminate the camera hole 50, n1 = 1.5 and n2 = 1, thus achieving the desired effect. Figure 7 Based on the optical path diagram, and according to the calculation formula for the critical angle mentioned above, C is approximately equal to 42°. Thus, the preset angle can be set to 42°, so the angle b between the generatrix of the camera hole 50 and the axis of the camera hole 50 can be greater than 0° and less than or equal to 42°, or it can be greater than 42° and less than 90°.

[0074] refer to Figure 9 Since the light emitted from the light-emitting surface 103 of the screen 10 will illuminate the camera hole 50, n1 = 1.5 and n2 = 1, thus achieving the desired effect. Figure 9 Based on the optical path diagram, and according to the calculation formula for the critical angle mentioned above, C is approximately equal to 42°. Therefore, the preset angle can be set to 42°-θ, and the angle b between the generatrix of the camera aperture 50 and the axis of the camera aperture 50 can be greater than 0° and less than or equal to 42°-θ, or greater than 42°-θ and less than 90°.

[0075] In some embodiments, reference Figure 3 and Figure 4 The cover plate 40 has an annular light-shielding part 60 on the side facing the optical adhesive layer 30. The orthogonal projection of the annular light-shielding part 60 on the optical adhesive layer 30 covers the edge of the camera hole 50.

[0076] It should be noted that the annular light-shielding part 60 covers the edge of the camera hole 50, so that when the user views the image displayed on the screen 10 from the side of the cover plate 40 facing away from the optical adhesive layer 30, the edge of the camera hole 50 will not be visible, thus improving the user's viewing experience. Furthermore, covering the edge of the camera hole 50 also enhances the overall aesthetic appearance of the display module 100.

[0077] Furthermore, when the angle between the generatrix of the camera hole 50 and the axis of the camera hole 50 in this embodiment is set to be greater than 0° and less than or equal to 42°-θ, a portion of the light emitted from the light-emitting surface 103 of the screen 10 will be refracted from the inner wall of the camera hole 50 into the camera hole 50. The annular light-shielding part 60 covers the edge of the camera hole 50 and also covers a portion of the opening of the camera hole 50. Thus, when the light refracted into the camera hole 50 is emitted from the opening of the camera hole 50, a portion of the light will illuminate the annular light-shielding part 60 and will not leak out from the opening of the camera hole 50. This reduces the proportion of light leaking out from the opening of the camera hole 50, effectively improves the light leakage phenomenon at the opening of the camera hole 50, reduces the impact on the image display of the opening area 101, and also reduces the impact on the shooting effect of the camera.

[0078] In some embodiments, the central axis of the annular light-shielding portion 60 coincides with the axis of the camera hole 50.

[0079] With the above settings, the area covered by the annular light-shielding part 60 at the opening of the camera hole 50 can be made into a ring, thereby uniformly blocking a portion of the light refracted into the camera hole 50 to prevent that portion of the light from escaping from the opening of the camera hole 50. This also facilitates the installation of devices such as cameras within the camera hole 50 without affecting the aesthetic appearance of the display module 100 after the camera or other devices are installed in the camera hole 50.

[0080] In some embodiments, the material of the annular light-shielding portion 60 is light-shielding tape or ink.

[0081] For example, the annular light-shielding part 60 can be made using ink. Before the cover plate 40 is attached to the optical adhesive layer 30, the ink can be applied to the surface of the cover plate 40 by deposition or spraying to form the annular light-shielding part 60.

[0082] refer to Figure 10 This application provides a method for manufacturing a display module 100, including the following steps:

[0083] S101. Prepare screen body 10, screen body 10 including opening area 101;

[0084] It is understandable that the screen body 10 is made of transparent glass. The screen body 10 is used to display images and has data lines for transmitting signals inside. The opening area 101 here refers to the position inside the screen body 10 where there are no data lines. Thus, when an opening is made in the opening area 101, it will not damage the data lines inside the screen body 10 and will not affect the normal display of images by the screen body 10.

[0085] S102. A polarizer 20 is provided on the screen 10;

[0086] S103. An optical adhesive layer 30 is formed on the polarizer 20;

[0087] S104. The optical adhesive layer 30, the polarizer 20 and the opening area 101 are cut to form a frustum-shaped camera hole 50 that runs through the optical adhesive layer 30, the polarizer 20 and the screen body 10; wherein, the area of ​​the camera hole 50 at the end near the optical adhesive layer 30 is smaller than the area of ​​the end near the screen body 10.

[0088] It should be noted that, in the embodiment of this application, when preparing the camera hole 50, a whole piece of unperforated polarizer 20 can be first set on the light-emitting surface 103 of the screen 10, and then an optical adhesive layer 30 can be fully covered on the surface of the polarizer 20. Then, the optical adhesive layer 30 can be integrally cut on the surface of the optical adhesive layer 30 by a cutting device, so that the optical adhesive layer 30, the polarizer 20 and the screen 10 can be integrally cut to form the camera hole 50 at one time. This not only simplifies the opening steps of the camera hole 50 and improves the opening efficiency of the camera hole 50, but also makes the inner wall of the camera hole 50 formed by integral cutting smoother, which is more conducive to the installation of devices such as cameras in the camera hole 50.

[0089] The camera hole 50 in the display module 100 prepared by the preparation method of this application is set as a frustum shape, and the area of ​​the end of the camera hole 50 near the optical adhesive layer 30 is smaller than the area of ​​the end of the camera hole 50 near the screen body 10. In this way, the end faces of the screen body 10, polarizer 20 and optical adhesive layer 30 are tilted relative to the thickness direction of the screen body 10 due to the opening of the camera hole 50. This reduces the proportion of light refracted on the end faces of polarizer 20 and optical adhesive layer 30, thereby reducing the light leakage ratio of the end faces of polarizer 20 and optical adhesive layer 30, improving the light leakage phenomenon of the opening area 101 and reducing the impact on the image display of the opening area 101.

[0090] refer to Figure 11 This application provides another method for manufacturing a display module 100, including the following steps:

[0091] S201. Prepare screen body 10, screen body 10 including opening area 101;

[0092] S202, A polarizer 20 is provided on the screen 10;

[0093] S203. An optical adhesive layer 30 is formed on the polarizer 20;

[0094] S204. A laser is used to integrally cut the optical adhesive layer 30, the polarizer 20, and the opening area 101 at a preset cutting angle to form a frustum-shaped camera hole 50 that runs through the optical adhesive layer 30, the polarizer 20, and the screen body 10. The preset cutting angle is greater than 0° and less than 90°, and the area of ​​the camera hole 50 at the end near the optical adhesive layer 30 is smaller than the area of ​​the end near the screen body 10.

[0095] It should be noted that using a laser to cut the optical adhesive layer 30, polarizer 20, and the opening area 101 of the screen body 10 can more quickly complete the integrated cutting of the camera hole 50. Moreover, calculating the preset cutting angle before cutting and cutting according to the preset cutting angle can make the resulting camera hole 50 meet the actual needs. For example, the size of the camera hole 50 can be more adapted to the size of the camera and other devices to be installed in the camera hole 50, or the structure of the camera hole 50 can prevent the light emitted from the light-emitting surface 103 of the screen body 10 from leaking out of the opening of the camera hole 50.

[0096] The camera hole 50 in the display module 100 prepared by the preparation method of this application is set as a frustum shape, and the area of ​​the end of the camera hole 50 near the optical adhesive layer 30 is smaller than the area of ​​the end of the camera hole 50 near the screen body 10. In this way, the end faces of the screen body 10, polarizer 20 and optical adhesive layer 30 are tilted relative to the thickness direction of the screen body 10 due to the opening of the camera hole 50. This reduces the proportion of light refracted on the end faces of polarizer 20 and optical adhesive layer 30, thereby reducing the light leakage ratio of the end faces of polarizer 20 and optical adhesive layer 30, improving the light leakage phenomenon of the opening area 101 and reducing the impact on the image display of the opening area 101.

[0097] refer to Figure 12 This application provides a display device, including a display module 100 as described in any of the above embodiments.

[0098] The display device also includes a support film 70, and the screen body 10 is disposed on the support film 70. When the camera hole 50 is opened, the support film 70 needs to be perforated at the same time, and the perforation on the support film 70 is adapted to the camera hole 50.

[0099] The detailed structure of the display module 100 can be referred to the above embodiments, and will not be repeated here. It is understood that since the display module 100 is used in the display device of this application, the embodiments of the display device of this application include all the technical solutions of all the embodiments of the display module 100, and can achieve the technical effects achieved by the above technical solutions.

[0100] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included 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: The screen body (10) includes an opening area (101), the opening area (101) has a first through hole (102) that passes through the screen body (10), and the screen body (10) has a light-emitting surface (103). A polarizer (20) is disposed on the light-emitting surface (103) of the screen body (10). A frustum-shaped second through hole (201) is provided on the polarizer (20), and the second through hole (201) is connected to the first through hole (102). An optical adhesive layer (30) is disposed on the side surface of the polarizer (20) facing away from the screen (10). A frustum-shaped third through hole (301) is formed on the optical adhesive layer (30), and the third through hole (301) is connected to the second through hole (201). A cover plate (40) is bonded to the optical adhesive layer (30) and covers the third through hole (301); The first through hole (102), the second through hole (201) and the third through hole (301) are interconnected to form a camera hole (50). The area of ​​the camera hole (50) at the end near the optical adhesive layer (30) is smaller than the area of ​​the end near the screen body (10). The angle between the generatrix of the second through hole (201) and the axis of the second through hole (201) is greater than 0° and less than 90°; the angle between the generatrix of the third through hole (301) and the axis of the third through hole (301) is greater than 0° and less than 90°.

2. The display module according to claim 1, characterized in that, The camera hole (50) is a frustum-shaped hole, and the angle between the generatrix of the camera hole (50) and the axis of the camera hole (50) is greater than 0° and less than 90°.

3. The display module according to claim 2, characterized in that, The angle between the generatrix of the camera hole (50) and the axis of the camera hole (50) is greater than 0° and less than or equal to a preset angle; Wherein, the preset angle is C-θ, where C refers to the critical angle of incidence of light that produces total internal reflection when light emitted from the light-emitting surface (103) enters the camera hole (50), and θ refers to the minimum value of the angle between the light emitted from the light-emitting surface (103) and the light-emitting surface (103).

4. The display module according to claim 2, characterized in that, The angle between the generatrix of the camera hole (50) and the axis of the camera hole (50) is greater than a preset angle and less than 90°; Wherein, the preset angle is C-θ, where C refers to the critical angle of incidence of light that produces total internal reflection when light emitted from the light-emitting surface (103) enters the camera hole (50), and θ refers to the minimum value of the angle between the light emitted from the light-emitting surface (103) and the light-emitting surface (103).

5. The display module according to any one of claims 1-4, characterized in that, The cover plate (40) has an annular light-shielding part (60) on one side of the optical adhesive layer (30), and the orthographic projection of the annular light-shielding part (60) on the optical adhesive layer (30) covers the edge of the camera hole (50).

6. The display module according to claim 5, characterized in that, The central axis of the annular light-shielding part (60) coincides with the axis of the camera hole (50).

7. The display module according to claim 6, characterized in that, The material of the annular light-shielding part (60) is light-shielding tape or ink.

8. A method for manufacturing a display module, used to manufacture the display module as described in any one of claims 2-7, characterized in that, include: Prepare a screen body (10), the screen body (10) including an opening area (101); A polarizer (20) is provided on the screen (10); An optical adhesive layer (30) is formed on the polarizer (20); The optical adhesive layer (30), the polarizer (20), and the opening area (101) are cut to form a frustum-shaped camera hole (50) that runs through the optical adhesive layer (30), the polarizer (20), and the screen body (10); wherein the area of ​​the camera hole (50) at the end near the optical adhesive layer (30) is smaller than the area of ​​the end near the screen body (10).

9. The preparation method according to claim 8, characterized in that, The step of cutting the optical adhesive layer (30), the polarizer (20), and the opening area (101) to form a frustum-shaped camera hole (50) penetrating the optical adhesive layer (30), the polarizer (20), and the screen body (10) includes: A laser is used to integrally cut the optical adhesive layer (30), the polarizer (20) and the opening area (101) at a preset cutting angle to form a frustum-shaped camera hole (50) that runs through the optical adhesive layer (30), the polarizer (20) and the screen body (10); Wherein, the preset cutting angle is greater than 0° and less than 90°, and the area of ​​the end of the camera hole (50) near the optical adhesive layer (30) is smaller than the area of ​​the end of the camera hole (50) near the screen body (10).

10. A display device, characterized in that, Includes the display module (100) as described in any one of claims 1-7.

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