Display module and display device

Abstract

The present invention discloses a display module and a display device, which relates to the field of display technology, and includes a backlight module and a display panel, wherein the display panel is located in the light emitting direction of the backlight module; the backlight module is provided with a through hole, and the through hole penetrates the backlight module along the thickness direction of the backlight module; the backlight module includes a first area and a second area surrounding the first area, and the first area surrounds the through hole; the backlight module includes a back plate and a light emitting element arranged on the side of the back plate facing the display panel, the light emitting element includes a first light emitting element located in the first area and a second light emitting element located in the second area, the first light emitting element is arranged around the through hole, and the arrangement density of the first light emitting element is greater than the arrangement density of the second light emitting element. By increasing the arrangement density of the first light emitting element arranged around the hole, fill light of the display area corresponding to the through hole is achieved, which is conducive to improving the display brightness uniformity of the display product.

Description

Technical Field

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

[0002] With the development of display technology, display panels have an increasingly higher screen-to-body ratio. Full-screen displays have attracted widespread attention due to their narrow or even borderless display effects. At present, the front of display devices such as mobile phones and tablets often needs to reserve space for photosensitive elements such as front cameras, infrared sensors, and fingerprint recognition devices. For example, the front camera can be set in the area below the display panel. The corresponding area can shoot when the front camera is turned on and display the picture when the front camera is turned off, thereby achieving a full screen and a narrow border effect.

[0003] In the prior art, in order to form a light path for photosensitive elements such as front cameras, a high light-transmittance area can be opened in the display area of ​​the display panel to accommodate the above-mentioned photosensitive elements. Specifically, the high light-transmittance area is usually a through hole formed by digging a hole in the backlight module. Since the display panel above the through hole needs to play a display function, but no light source is set at the through hole position, the display brightness of the display area directly above the through hole and the regular display area is different, resulting in uneven display. Summary of the invention

[0004] In view of this, the present invention provides a display module and a display device, aiming to improve the problem of uneven display of display products.

[0005] In a first aspect, the present invention provides a display module, comprising: a backlight module and a display panel, wherein the display panel is located in a light emitting direction of the backlight module;

[0006] The backlight module is provided with a through hole, and the through hole penetrates the backlight module along the thickness direction of the backlight module; the backlight module comprises a first area and a second area surrounding the first area, and the first area surrounds the through hole;

[0007] The backlight module includes a back plate and light-emitting elements arranged on the side of the back plate facing the display panel, the light-emitting elements include a first light-emitting element located in a first area and a second light-emitting element located in the second area, the first light-emitting elements are arranged around the through holes, and the arrangement density of the first light-emitting elements is greater than the arrangement density of the second light-emitting elements.

[0008] In a second aspect, based on the same inventive concept, the present invention further provides a display device, comprising the display module provided in the first aspect of the present invention.

[0009] Compared with the prior art, the display module and display device provided by the present invention achieve at least the following beneficial effects:

[0010] In the display module and display device provided by the present invention, the display panel is arranged in the light emitting direction of the backlight module, the backlight module is provided with a through hole, the backlight module includes a first area arranged around the through hole and a second area arranged around the first area, a first light emitting element is arranged in the first area, a second light emitting element is arranged in the second area, the first light emitting element is arranged around the through hole, and the arrangement density of the first light emitting element is greater than the arrangement density of the second light emitting element. When the arrangement density of the first light emitting element is large, it is beneficial to increase the overall light output of the first light emitting element in the first area. Since the first light emitting element is arranged around the through hole, the light emitted by the first light emitting element can be directed to the display area corresponding to the through hole, and the brightness of the display area corresponding to the through hole is compensated. The arrangement density of the first light emitting element is large, which is beneficial to improve the brightness compensation effect of the display area corresponding to the through hole, so it is beneficial to reduce the display brightness difference between the conventional display area and the display area corresponding to the through hole, improve the overall display uniformity of the display panel, and then help improve the overall display effect of the display panel.

[0011] Of course, any product implementing the present invention does not necessarily need to achieve all of the above-mentioned technical effects at the same time.

[0012] Further features and advantages of the present invention will become apparent from the following detailed description of exemplary embodiments of the present invention with reference to the attached drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the invention and, together with the description, serve to explain the principles of the invention.

[0014] Figure 1 FIG. 1 is a schematic diagram of a structure of a display module provided by an embodiment of the present invention;

[0015] Figure 2 Shown Figure 1 An AA cross-sectional view of the module is shown in FIG.

[0016] Figure 3 The figure shows a schematic diagram of an arrangement of the first light emitting element and the second light emitting element in the backlight module;

[0017] Figure 4 The figure shows a relative position relationship diagram of the first light emitting element and the second light emitting element around the through hole;

[0018] Figure 5 FIG. 1 is a schematic diagram of a structure of a first light-emitting element provided in an embodiment of the present invention;

[0019] Figure 6FIG. 2 is another schematic diagram of the structure of the first light emitting element provided in an embodiment of the present invention;

[0020] Figure 7 FIG. 2 is another schematic diagram of the structure of the first light emitting element provided in an embodiment of the present invention;

[0021] Figure 8 Shown is a connection schematic diagram of the first light-emitting element arranged around the through hole;

[0022] Fig. 9 Another connection schematic diagram of the first light-emitting element arranged around the through hole is shown;

[0023] Fig.10 Shown Figure 1 Another AA cross-sectional view of the module is shown in the figure;

[0024] Fig.11 Shown Fig.10 A top view of the first optical film;

[0025] Fig.12 Shown is an enlarged schematic diagram of the first optical film;

[0026] Fig.13 Shown Figure 1 Another AA cross-sectional view of the module is shown in the figure;

[0027] Fig.14 The figure shows a relative position relationship diagram of the first optical film and the second optical film;

[0028] Fig.15 Shown Figure 1 Another AA cross-sectional view of the module is shown in the figure;

[0029] Fig.16 The figure shows a top view of the relationship between the first sealing glue, the first light-emitting element and the second light-emitting element;

[0030] Fig.17 Shown is a schematic diagram of a package of a first light-emitting element and a second light-emitting element;

[0031] Fig.18 FIG. 1 is a schematic diagram of a structure of a display device provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0032] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that the relative arrangement of components and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present invention unless otherwise specifically stated.

[0033] The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses.

[0034] Technologies, methods, and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and equipment should be considered as part of the specification.

[0035] In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not limiting. Therefore, other examples of the exemplary embodiments may have different values.

[0036] It is obvious to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the present invention. Therefore, the present invention is intended to cover modifications and variations of the present invention that fall within the scope of the corresponding claims (technical solutions claimed for protection) and their equivalents. It should be noted that the implementation methods provided in the embodiments of the present invention can be combined with each other without contradiction.

[0037] It should be noted that like reference numerals and letters refer to similar items in the following figures, and therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0038] Figure 1 FIG. 1 is a schematic diagram of a structure of a display module provided by an embodiment of the present invention. Figure 2 Shown Figure 1 An AA cross-section of the display module is shown in the figure. Figure 3 The figure shows a schematic diagram of an arrangement of the first light emitting element and the second light emitting element in the backlight module. Figures 1 to 3 , a display module 100, comprising: a backlight module 20 and a display panel 10, wherein the display panel 10 is located in a light emitting direction of the backlight module 20;

[0039] The backlight module 20 is provided with a through hole K, which penetrates the backlight module 20 along the thickness direction of the backlight module 20; the backlight module 20 includes a first area Q1 and a second area Q2 surrounding the first area Q1, and the first area Q1 surrounds the through hole K;

[0040] The backlight module 20 includes a back plate 00 and a light-emitting element 30 arranged on the side of the back plate 00 facing the display panel 10. The light-emitting element 30 includes a first light-emitting element 31 located in the first zone Q1 and a second light-emitting element 32 located in the second zone Q2. The first light-emitting element 31 is arranged around the through hole K, and the arrangement density of the first light-emitting element 31 is greater than the arrangement density of the second light-emitting element 32.

[0041] It should be noted that Figure 1The illustrated embodiment only illustrates the display panel 10 of the present invention by taking the rounded rectangular display panel 10 as an example, and does not limit the specific structure of the display panel 10 of the present invention. In some other embodiments of the present invention, the shape of the display panel 10 may also be rectangular, circular, elliptical, or other structures including curved edges, and the present invention does not specifically limit this. Figure 1 Only one relative position of the through hole K on the display module is illustrated. In other embodiments of the present invention, the through hole K may also be disposed at other positions of the display module, and the shape of the through hole K may also be set according to actual conditions. Figure 1 The circle is only for illustration, and for example, the through hole K may also be set to be square, racetrack-shaped, etc. In addition, the size of the through hole K may also be flexibly set according to actual needs. Figure 2 The illustrated embodiment only schematically shows a relative position relationship diagram of the display panel 10, the backlight module 20, and the through hole K, and does not represent the actual size; the first light-emitting element 31 and the second light-emitting element 32 may include miniLED or MicroLED, etc., and the present application does not limit this.

[0042] In the related art, when a through hole K is set on the backlight module, in the light-sensing stage, such as the shooting stage, the through hole transmits light to the camera; in the display stage, the area corresponding to the through hole will display the picture. However, since the light provided by the backlight module cannot be directly provided to the area corresponding to the through hole, the display brightness of the display area corresponding to the through hole and other display areas is greatly different in the display stage, which affects the display effect of the full screen.

[0043] In the display module provided by the present invention, the display panel 10 is arranged in the light emitting direction of the backlight module 20, the backlight module 20 is provided with a through hole K, the backlight module 20 includes a first area Q1 arranged around the through hole K and a second area Q2 arranged around the first area Q1, a first light emitting element 31 is arranged in the first area Q1, and a second light emitting element 32 is arranged in the second area Q2, the first light emitting element 31 is arranged around the through hole K, and the arrangement density of the first light emitting element 31 is greater than the arrangement density of the second light emitting element 32, and the arrangement density of the light emitting element 30 refers to the number of light emitting elements 30 arranged in the same unit area, for example, please refer to Figure 3 , along the circumferential direction of the through hole K, the distance between two adjacent first light-emitting elements 31 in the first region Q1 is smaller than the distance between two adjacent second light-emitting elements 32 in the second region.

[0044] When the arrangement density of the first light-emitting elements 31 is relatively large, it is beneficial to increase the overall light output of the first light-emitting elements 31 in the first zone Q1. Since the first light-emitting elements 31 are arranged around the through hole K, the light emitted by the first light-emitting elements 31 can be directed to the display area corresponding to the through hole K, and the brightness of the display area corresponding to the through hole K is compensated. The arrangement density of the first light-emitting elements 31 is relatively large, so it is beneficial to improve the brightness compensation effect of the display area corresponding to the through hole K, so it is beneficial to reduce the display brightness difference between the conventional display area and the display area corresponding to the through hole K, improve the overall display uniformity of the display panel 10, and then help improve the overall display effect of the display panel 10.

[0045] Figure 4 The diagram shows a relative position relationship diagram of the first light emitting element 31 and the second light emitting element 32 around the through hole K. This embodiment illustrates the light patterns of the first light emitting element 31 and the second light emitting element 32 .

[0046] Please refer to Figure 4 , and combined with Figure 2 In an optional embodiment of the present invention, the first light-emitting element 31 and the second light-emitting element 32 have different light-emitting light patterns. Optionally, the light pattern corresponding to the first light-emitting element 31 is a unilateral special-shaped light pattern, and the light emitted by the first light-emitting element 31 is effectively deflected in the direction of the central axis Z of the through hole K, that is, among the light emitted by the first light-emitting element 31, more light will be emitted in the direction of the central axis of the through hole K. The light pattern corresponding to the second light-emitting element 32 is a conventional light pattern, that is, the light output is the largest at the normal viewing angle, and more light will be emitted in the direction of the display panel 10 directly above the second light-emitting element 32. The embodiment of the present invention introduces a first light-emitting element 31 of a unilateral special-shaped light structure in the first zone Q1 of the backlight module 20. Compared with the second light-emitting element 32 of a conventional light type (large light output at a normal viewing angle), the light output direction of the light emitted by the first light-emitting element 31 of the unilateral special-shaped light type has changed. More light emitted by the first light-emitting element 31 is emitted in the direction of the central axis of the through hole K, not in the normal viewing angle. Therefore, more light of the light emitted by the first light-emitting element 31 can be emitted to the display area directly above the through hole K, thereby achieving effective fill light for the display area directly above the through hole K, which is more conducive to reducing the display brightness difference between the display area above the through hole K and the conventional display area, and improving the overall display uniformity of the display module. In addition, the embodiment of the present invention sets the second light-emitting element 32 of the conventional light type in the second zone Q2. Since the second light-emitting element 32 has a large light output at a normal viewing angle, it is conducive to improving the brightness of the second zone Q2 at a normal viewing angle, so as to ensure the display brightness of the second zone Q2 in the display panel.

[0047] Figure 5FIG. 1 is a schematic diagram of a structure of the first light emitting element 31 provided in an embodiment of the present invention. Figure 4 and Figure 5 In an optional embodiment of the present invention, the first light-emitting element 31 includes a light-emitting body 310 and a reflective layer 313, the light-emitting body 310 includes a first body 311 and a second body 312 arranged along the radial direction of the through hole K, the first body 311 is located between the second body 312 and the through hole K, and the reflective layer 313 is at least located on the surface of the second body 312 away from the back panel 00.

[0048] Specifically, when the first light-emitting element 31 is a single-sided special-shaped light type, in order to realize the single-sided special-shaped light type, this embodiment shows a solution in which a reflective layer 313 is provided on a portion of the surface of the light-emitting body 310 away from the back plate 00. When the light-emitting body 310 of the first light-emitting element 31 emits light, when the light is irradiated to the reflective layer 313, it will be reflected back into the light-emitting body 310 after being reflected by the reflective layer 313, and emitted from the surface of the light-emitting body 310 where the reflective layer 313 is not provided. When the first light-emitting element 31 is arranged around the through hole K, along the direction in which the first light-emitting element 31 points to the through hole K, assuming that the light-emitting body 310 of the first light-emitting element 31 includes a first body 311 and a second body 312, the first body 311 is located between the second body 312 and the through hole K, the surface of the first body 311 away from the back plate 00 is the first surface S1, and the surface of the second body 312 away from the back plate 00 is the second surface S2, wherein the first surface S1 is located between the second surface S2 and the through hole K, then the reflective layer 313 is located on the second surface S2. , and the reflective layer 313 is not provided on the first surface S1. Thus, more light emitted by the light-emitting body 310 will be emitted through the first surface S1. Since the first surface S1 is a surface closer to the through hole K, the light emitted through the first surface S1 will be able to be emitted toward the central axis of the through hole K, and then toward the display area directly above the through hole K, which can effectively fill in the light for the display area directly above the through hole K, thereby facilitating reducing the display brightness difference between the display area directly above the through hole K and the conventional display area, and improving the overall display uniformity of the display panel 10.

[0049] It should be noted that the reflective layer 313 mentioned in the embodiment of the present invention may include any material with reflective properties, such as aluminum and other materials with high reflectivity, and the reflective layer 313 may be fixed to the light-emitting body 310 of the first light-emitting element 31 by coating or pasting.

[0050] Figure 6 FIG. 1 is another schematic diagram of the structure of the first light emitting element 31 provided in an embodiment of the present invention. This embodiment illustrates another feasible structure of the first light emitting element 31 with a single-sided irregular light pattern. Figure 6In an optional embodiment of the present invention, the reflective layer 313 is also located on at least a portion of the side wall of the second body 312 .

[0051] Specifically, please combine Figure 4 and Figure 6 When the first light-emitting element 31 is arranged around the through hole K, along the direction of the first light-emitting element 31 pointing to the through hole K, it is assumed that the first light-emitting element 31 includes a first side surface CS1 and a second side surface CS2, wherein the first side surface CS1 is located between the second side surface CS2 and the through hole K, that is, the first side surface CS1 is a side surface of the first body 311, and the second side surface CS2 is a side surface of the second body 312. This embodiment shows a solution in which, in addition to setting a reflective layer 313 on the second surface S2 of the light-emitting body 310 of the first light-emitting element 31 on the side away from the back plate 00, a reflective layer 313 is also set on the second side CS2 of the second body 312. When the reflective layer 313 is set on the second surface S2 and the second side CS2 of the second body 312, when the light emitted by the light-emitting body 310 is irradiated to the second surface S2 and the second side CS2, the light will be further reflected into the light-emitting body 310, and most of this part of the light will be able to be emitted through the first surface S1 and the first side CS1 where the reflective layer 313 is not set. Through the further reflection effect of the reflective layer 313 on the second side CS2, the amount of light emitted from the first surface and the first side CS1 of the light-emitting body 310 is further increased, that is, the amount of light emitted in the direction of the central axis of the through hole K is increased, thereby increasing the amount of fill light for the display area directly above the through hole K, which is more conducive to improving the brightness of the display area directly above the through hole K and reducing the display brightness difference between the display area and other display areas.

[0052] Figure 5 and Figure 6 The light emitting body 310 of the first light emitting element 31 is taken as an example of a rectangular parallelepiped structure, but the actual structure of the light emitting body 310 of the first light emitting element 31 is not limited. The light emitting body 310 of the first light emitting element 31 is taken as an example of other structures.

[0053] Figure 7 FIG. 1 is another schematic diagram of the structure of the first light emitting element 31 provided in an embodiment of the present invention. In this embodiment, the light emitting body 310 of the first light emitting element 31 is a special-shaped structure for illustration.

[0054] Please refer to Figure 7In an optional embodiment of the present invention, the first body 311 includes a first surface M1, a second surface M2, and a third surface M3 located between the first surface M1 and the second surface M2 along the first direction F1, wherein the third surface M3 is connected to the first surface M1 and the second surface M2 respectively, the second surface M2 is located on the side of the first surface M1 facing the back panel 00, the first direction F1 is perpendicular to the back panel 00; the angle between the first surface M1 and the third surface M3 is an obtuse angle.

[0055] When the light-emitting body 310 of the first light-emitting element 31 is a special-shaped structure, this embodiment shows a scheme in which the first body 311 without the reflective layer 313 in the first light-emitting element 31 is a special-shaped structure. Among the first surface M1, the second surface M2 and the third surface M3 connected in sequence by the first body 311, the second surface M2 is a surface parallel to the back plate 00 and closest to the back plate 00, the third surface M3 connects the first surface M1 and the second surface M2, the first surface M1 is the first surface of the first body 311, the first surface M1 is an inclined surface, and the angle between the first surface M1 and the third surface M3 is an obtuse angle, that is, the distance between the end of the first surface M1 connected to the second body 312 and the back plate 00 is greater than the distance between the end of the first surface M1 connected to the third surface M3 and the back plate 00. When the first light-emitting element 31 is arranged around the through hole K, the first body 311 is arranged obliquely toward the display area directly above the through hole K. In this way, when the light-emitting body 310 emits light, the inclined first surface M1 can adjust the light output direction, so that more light is emitted toward the display area above the through hole K, which is beneficial to increase the amount of light emitted to the display area directly above the through hole K, and has a better light compensation effect on the display area directly above the through hole K.

[0056] In an optional embodiment of the present invention, the display module further includes a photosensitive element 90 disposed in the through hole K, and the photosensitive element 90 and the first light-emitting element 31 are activated in a time-sharing manner. Optionally, the photosensitive element is a functional device such as a camera.

[0057] The display area directly above the through hole K includes two working stages, namely, the photosensitive stage and the display stage, wherein the photosensitive stage and the display stage are performed in time-sharing, that is, the photosensitive element 90 in the through hole K and the first light-emitting element 31 around the through hole K are started in time-sharing. In the photosensitive stage, the first light-emitting element 31 is in a closed state, and the photosensitive element in the through hole K plays the function of light sensing. The light of the first light-emitting element 31 will not be emitted to the through hole K, so as to avoid affecting the light sensing effect of the photosensitive element. In the display stage, the photosensitive element is turned off, and the light emitted by the first light-emitting element 31 is emitted to the display area directly above the through hole K, providing the display area directly above the through hole K with the light required for display, which is equivalent to providing a display light source for the display area directly above the through hole K. Compared with the method in the prior art in which no light source is provided to the area directly above the through hole K, the display brightness of the display area directly above the through hole K is increased, thereby facilitating to reduce the display brightness difference between the display area directly above the through hole K and the conventional display area, and improving the display uniformity of the display panel 10.

[0058] Figure 8 FIG. 1 is a schematic diagram showing a connection of the first light emitting element 31 arranged around the through hole K. It should be noted that, in order to clearly illustrate the connection relationship of the first light emitting element 31, Figure 8 Different fillings are used to distinguish the first sub-light emitting element 311 and the second sub-light emitting element 312 in the first light emitting element 31, but the structures of the first sub-light emitting element 311 and the second sub-light emitting element 312 are not limited. In fact, the first sub-light emitting element 311 and the second sub-light emitting element 312 are light emitting elements 30 with exactly the same structure.

[0059] Please refer to Figure 8 In an optional embodiment of the present invention, the first light-emitting element 31 includes a plurality of first sub-light-emitting elements 311 and a plurality of second sub-light-emitting elements 312 alternately arranged around the through hole K, the plurality of first sub-light-emitting elements 311 are connected in series, the plurality of second sub-light-emitting elements 312 are connected in series, the first sub-light-emitting elements 311 and the second sub-light-emitting elements 312 are connected to different signal terminals respectively, and optionally, the signal terminal here refers to the terminal to which the positive electrode of the light-emitting element is connected. Optionally, the negative electrodes of the first sub-light-emitting elements 311 connected in series and the second sub-light-emitting elements 312 connected in series can be connected to the same ground terminal.

[0060] Specifically, Figure 8A situation in which the first light-emitting element 31 and the second light-emitting element 32 are alternately arranged along the circumferential direction of the through hole K is shown, and a second light-emitting element 312 is arranged between every two first sub-light-emitting elements 311, and a first light-emitting element 311 is arranged between every two second sub-light-emitting elements 312. Among them, a plurality of first sub-light-emitting elements 311 are connected in series, a plurality of second sub-light-emitting elements 312 are connected in series, and the first sub-light-emitting element 311 and the second sub-light-emitting element 312 are respectively connected to different signal terminals, that is, the light-emitting conditions of the first sub-light-emitting element 311 and the second sub-light-emitting element 312 can be controlled by the signal terminal. One feasible implementation is that only the first sub-light-emitting element 311 connected in series emits light, another feasible implementation is that only the second sub-light-emitting element 312 connected in series emits light, and another feasible implementation is that the first sub-light-emitting element 311 and the second sub-light-emitting element 312 emit light at the same time. The way in which the first sub-light-emitting element 311 and the second sub-light-emitting element 312 are connected in series and controlled separately is conducive to improving the flexibility of the brightness of the light provided by the first light-emitting element 31 to the display area directly above the through hole K. In addition, when only the first sub-light-emitting element 311 emits light, or only the second sub-light-emitting element 312 emits light, the present application adopts an alternating arrangement of the first sub-light-emitting element 311 and the second sub-light-emitting element 312, which is beneficial to improving the uniformity of light provided to the display area directly above the through hole K, and thus helps to improve the display brightness uniformity of the display area directly above the through hole K.

[0061] It should be noted that Figure 8 Taking the first sub-light emitting elements 311 and the second sub-light emitting elements 312 as an example, this method is conducive to improving the uniformity of the light provided to the display area. In some other embodiments of the present invention, the first sub-light emitting elements 311 and the second sub-light emitting elements 312 can also be arranged in pairs, that is, two second sub-light emitting elements are arranged between every two first sub-light emitting elements, and two first sub-light emitting elements are arranged between every two second sub-light emitting elements. For example, please refer to Fig. 9 , which can also provide uniform light to the display area, Fig. 9 Another connection schematic diagram of the first light-emitting element arranged around the through hole K is shown.

[0062] Continue to combine Figure 2 and Figure 3 In an optional embodiment of the present invention, the second light-emitting element 32 includes a third sub-light-emitting element 323 and a fourth sub-light-emitting element 324, the third sub-light-emitting element 323 surrounds the first light-emitting element 31, and the fourth sub-light-emitting element 324 surrounds the third sub-light-emitting element 323;

[0063] The photosensitive element 90 is in an off state, one of the first sub-light emitting element 311 and the second sub-light emitting element 312 is in an on state, and the driving current of the third sub-light emitting element 323 is greater than the driving current of the fourth sub-light emitting element 324;

[0064] Alternatively, the photosensitive element 90 is in an off state, the first sub-light emitting element 311 and the second sub-light emitting element 312 are both in an on state, and the driving current of the third sub-light emitting element 323 is smaller than the driving current of the fourth sub-light emitting element 324 .

[0065] Specifically, Figure 3 A schematic diagram of the arrangement of the first light-emitting element 31 and part of the second light-emitting element 32 around the through hole K is shown. The second light-emitting element 32 includes a third sub-light-emitting element 323 adjacent to the first light-emitting element 31 and arranged around the second light-emitting element 32, and a fourth sub-light-emitting element 324 arranged around the third sub-light-emitting element 323. That is, the third sub-light-emitting element 323 is closer to the through hole K, and the fourth sub-light-emitting element 324 is farther from the through hole K. At least part of the light emitted by the third sub-light-emitting element 323 will also be transmitted to the display area directly above the through hole K, so the light brightness of the third sub-light-emitting element 323 will also affect the brightness of the display area directly above the through hole K. In the display stage, the photosensitive element 90 is turned off. If the first light-emitting element 31 is not introduced, the display brightness of the display area directly above the through hole K is different from that of the normal display area, but the difference is not large. In this case, it is not necessary to turn on the first sub-light-emitting element 311 and the second sub-light-emitting element 312 at the same time to provide light to the display area directly above the through hole K. At this time, one of the first sub-light-emitting element 311 and the second sub-light-emitting element 312 can be in the turned-on state. If the light provided by the first sub-light-emitting element 311 or the second sub-light-emitting element 312 to the display area directly above the through hole K is not enough to compensate for the brightness difference of the display area, the third sub-light-emitting element 311 can be turned on at the same time. The driving current of the light element 323 is greater than the driving current of the fourth sub-light-emitting element 324 to increase the luminous brightness of the third sub-light-emitting element 323, thereby increasing the amount of light emitted by the third sub-light-emitting element 323 and directed toward the display area directly above the through hole K. The light emitted by the third sub-light-emitting element 323 toward the display area directly above the through hole K is used to compensate for the difference in display brightness between the display area corresponding to the through hole K and the conventional display area, thereby achieving a fine adjustment of the display brightness of the display area corresponding to the through hole K, which is more conducive to balancing the difference in display brightness between the display area corresponding to the through hole K and the conventional display area, and improving the overall display uniformity of the display panel 10.

[0066] When the first light-emitting element 31 is not introduced, and the display brightness of the display area directly above the through hole K is greatly different from that of the normal display area, in the display stage, the first sub-light-emitting element 311 and the second sub-light-emitting element 312 can be turned on at the same time to jointly provide compensation light to the display area directly above the through hole K. At this time, in order to avoid the problem that the brightness of the display area directly above the through hole K is too bright when the third light-emitting element 30 also provides more light to the display area directly above the through hole K, the present embodiment can also appropriately reduce the driving current of the third sub-light-emitting element 323, so that the driving current of the third sub-light-emitting element 323 is less than the driving current of the fourth sub-light-emitting element 324, thereby reducing the luminous brightness of the third sub-light-emitting element 323, and reducing the amount of light provided by the third sub-light-emitting element 323 to the display area directly above the through hole K, so that the brightness of the display area directly above the through hole K and the brightness of the normal display area are better balanced.

[0067] Fig.10 Shown Figure 1 Another AA cross-section of the module is shown in the figure. Fig.11 Shown Fig.10 A top view of the first optical film 50, Fig.12 FIG. 5 is an enlarged schematic diagram of the first optical film 50 . This embodiment shows a solution of introducing the first optical film 50 into the display module.

[0068] Please refer to Figures 10 to 12 In an optional embodiment of the present invention, the display module provided by the embodiment of the present invention further includes a first optical film 50, the first optical film 50 is located in the through hole K, and is located between the display panel 10 and the first light-emitting element 31; the first optical film 50 includes a first hollow portion K1 penetrating the first optical film 50 along the thickness direction of the first optical film 50, and the orthographic projection of the first light-emitting element 31 to the plane where the back plate 00 is located surrounds the orthographic projection of the first hollow portion K1 on the plane where the back plate 00 is located;

[0069] A first microstructure 51 is disposed on one side of the first optical film 50 facing the first light emitting element 31 ; at least part of the light emitted by the first light emitting element 31 is emitted into the first hollow portion K1 through the first microstructure 51 and is transmitted to the display panel 10 .

[0070] Specifically, this embodiment shows a solution of introducing the first optical film 50 in the through hole K. The first optical film 50 is located on the side of the first light-emitting element 31 facing the display panel 10. The first optical film 50 is provided with a first hollow portion K1. The central axis of the first hollow portion K1 is collinear with the central axis of the through hole K. That is, the first optical film 50 is an annular structure disposed in the through hole K and directly above the first light-emitting element 31. Along the thickness direction of the display module, the annular structure of the first optical film 50 overlaps with the first light-emitting element 31. The first microstructure 51 is provided on the side of the annular structure of the first optical film 50 facing the first light-emitting element 31. Fig.12 The sawtooth microstructure is used as an example for explanation. After at least part of the light emitted by the first light-emitting element 31 is emitted to the first microstructure 51, the light path changes, and more light is emitted toward the display area directly above the through hole K. The introduction of the first microstructure 51 allows the light emitted by the first light-emitting element 31 to further converge toward the display area directly above the through hole K, thereby facilitating the increase in the amount of light emitted to the display area directly above the through hole K, and improving the effective utilization rate of the light emitted by the first light-emitting element 31.

[0071] Fig.13 Shown Figure 1 Another AA cross-section of the module is shown in the figure. Fig.14 The diagram shows a relative position relationship between the first optical film 50 and the second optical film 60 . This embodiment shows a solution of simultaneously introducing the first optical film 50 and the second optical film 60 into the display module.

[0072] Please refer to Fig.13 and Fig.14 In an optional embodiment of the present invention, the display module further includes a second optical film 60, which is located in the through hole K and on a side of the first optical film 50 away from the first light-emitting element 31; the second optical film 60 is a planar structure, and the second optical film 60 includes a first surface S01 and a second surface S02 that are oppositely arranged, and the second surface S02 is located between the first surface S01 and the first optical film 50;

[0073] The first surface S01 is parallel to the back plate 00, and the second surface S02 is provided with a second microstructure 61. The light emitted from the first optical film 50 passes through the second microstructure 61 and then emits in a direction perpendicular to the first surface S01. Optionally, the second microstructure 61 on the second surface S02 is a wavy microstructure.

[0074] Specifically, this embodiment further shows a solution of further introducing a second optical film 60 into the through hole K, and the second optical film 60 is located on the side of the first optical film 50 facing the display panel 10. The light emitted by the first light-emitting element 31 changes the light path through the first optical film 50 and is emitted toward the area directly above the through hole K. This part of the light passes through the second optical film 60 before being emitted toward the display panel 10. The surface of the second optical film 60 facing the first optical film 50 is provided with a second microstructure 61. After the light passes through the second microstructure 61, the light path is further changed, and finally the light is emitted toward the display panel 10 in a direction perpendicular to the display panel 10. Considering that if the light emitted to the display panel 10 is an inclined light, part of the light may be emitted to a position in the display panel 10 that does not correspond to the through hole K, and this part of the light cannot be effectively utilized (it does not contribute to the brightness of the display area corresponding to the through hole). When the second optical film 60 is introduced on the side of the first optical film 50 facing the display panel 10, the light emitted through the second optical film 60 is perpendicular to the direction of the display panel 10, which is beneficial to ensure that the remaining part of the light emitted from the second optical film 60 is emitted to the display area corresponding to the through hole K, which can further improve the utilization rate of the light emitted by the first light-emitting element 31, and further help to further improve the display brightness of the display area directly above the through hole K, reduce the display brightness difference between the display area directly above the through hole K and the conventional display area, and therefore is more conducive to improving the display brightness uniformity of the display module.

[0075] Continue to refer Fig.13 In an optional embodiment of the present invention, the backlight module 20 also includes an optical module 21 arranged on the side of the light-emitting element 30 away from the back panel 00. Along the direction parallel to the back panel 00, the optical module 21 surrounds the first optical film 50; along the direction perpendicular to the back panel 00, the optical module 21 covers the second light-emitting element 32 and does not overlap with the first light-emitting element 31.

[0076] Specifically, the optical module 21 mentioned in the embodiment of the present invention is an optical module 21 disposed above the second light-emitting element 32 to process the light emitted by the second light-emitting element 32. This part of the optical module 21 may include, for example, film layers such as a diffuser and a brightness enhancement film. Optionally, the first light-emitting element 31 and the second light-emitting element 32 in the embodiment of the present invention are disposed on the same backplane 00. The portion of the backplane corresponding to the first light-emitting element 31 can be regarded as extending the backplane corresponding to the second light-emitting element 32 into the through hole K. Along the thickness direction of the display module, the first light-emitting element 31 does not overlap with the optical module 21. When the first optical film 50 is introduced, the first optical film 50 is disposed directly above the first light-emitting element 31 and the backplane corresponding to the first light-emitting element 31. At this time, the optical module 21 surrounds the first optical film 50 as a whole. The light emitted by the first light-emitting element 31 is emitted toward the display area corresponding to the through hole K after being processed by the first optical film 50, and the light emitted by the second light-emitting element 32 is emitted toward the conventional display area after being processed by the optical module 21. In this way, the problem of uneven display brightness between the display area corresponding to the through hole K and the conventional display area is effectively solved.

[0077] Please refer to Figure 2 In an optional embodiment of the present invention, the backlight module 20 also includes an optical module 21 arranged on the side of the light-emitting element 30 away from the back plate 00, and the optical module 21 covers the first light-emitting element 31 and the second light-emitting element 32 along a direction perpendicular to the back plate 00.

[0078] Specifically, this embodiment shows a relative positional relationship between the first light-emitting element 31, the second light-emitting element 32 and the optical module 21 when the first optical film 50 is not introduced into the display module. Optionally, the optical module 21 includes film layers such as a diffuser and a brightness enhancement film. In this embodiment, along the direction perpendicular to the back plate 00, that is, the thickness direction of the display module, the optical module 21 covers the first light-emitting element 31 and the second light-emitting element 32, wherein the first light-emitting element 31 is arranged close to the through hole K. In this embodiment, by introducing the first light-emitting element 31 and increasing the arrangement density of the first light-emitting element 31, the light-emitting direction of the first light-emitting element 31 can be changed by setting the first light-emitting element 31 and the second light-emitting element 32 to different light types, so that more light in the light emitted by the first light-emitting element 31 is emitted in the direction of the display area corresponding to the through hole K, and the light in the display area directly above the through hole K can be compensated without changing other structures of the display module, which is beneficial to improving the overall display brightness uniformity of the display panel 10 and simplifying the overall structural design of the display panel 10, thereby reducing the manufacturing process of the display module and improving production efficiency.

[0079] Please combine Fig.15 and Fig.16 ,in, Fig.15 Shown Figure 1 Another AA cross-section of the module is shown in the figure. Fig.16 The figure shows a top view of the relationship between the first sealant 70, the first light-emitting element 31 and the second light-emitting element 32. In an optional embodiment of the present invention, the light-emitting element 30 is a blue light-emitting element. The backlight module 20 further includes a quantum dot film 22 disposed on the side of the light-emitting element 30 away from the back plate 00. In a direction perpendicular to the back plate 00, the orthographic projection of the quantum dot film 22 on the back plate 00 covers the orthographic projection of the light-emitting element 30 on the back plate 00.

[0080] The display module also includes a first sealant 70. Along a direction perpendicular to the back plate 00, the first sealant 70 is located between the quantum dot film 22 and the back plate 00. Along a direction parallel to the back plate 00, the first sealant 70 surrounds the through hole K, and the first sealant 70 is located between the first light-emitting element 31 and the through hole K. The first sealant 70 is a non-transparent sealant.

[0081] Specifically, when the first light-emitting element 31 and the second light-emitting element 32 in the embodiment of the present invention are both blue light-emitting elements 30, a quantum dot film 22 can be introduced on the side of the first light-emitting element 31 and the second light-emitting element 32 facing the display panel 10. Through the color conversion effect of the quantum dot film 22, the blue light emitted by the light-emitting element 30 can be converted into white light and provided to the display panel 10. In the embodiment of the present invention, a non-transparent first sealant 70 is introduced between the first light-emitting element 31 and the through hole K. The first sealant 70 is arranged around the through hole K. The first sealant 70 can block the blue light emitted by the first light-emitting element 31 from entering the through hole K from the side of the first light-emitting element 31. The non-transparent first sealant 70 plays a role in blocking the blue light from being transmitted to the through hole K, so that the light emitted by the first light-emitting element 31 to the through hole K is the light after color conversion through the quantum dot film 22, which is conducive to avoiding the blue phenomenon in the display area corresponding to the through hole K, so as to improve the overall display effect of the display panel 10.

[0082] Optionally, the non-transparent first sealant 70 can be implemented by a sealant with poor transmittance but does not affect the display effect. In an optional embodiment of the present invention, the first sealant 70 is a white sealant. When a white sealant is used, the white sealant can block the conduction of the blue light emitted by the first light-emitting element 31, and will not produce a display boundary in the area corresponding to the through hole K, thereby helping to improve the overall display effect of the display module.

[0083] Continue to refer Fig.15 In an optional embodiment of the present invention, the light emitting element 30 is a blue light emitting element; the backlight module 20 further includes a quantum dot film 22 disposed on the side of the light emitting element 30 away from the back plate 00, and along a direction perpendicular to the back plate 00, the orthographic projection of the quantum dot film 22 on the back plate 00 covers the back plate 00;

[0084] The orthographic projection of the quantum dot film 22 on the back plate 00 includes a first edge B1 adjacent to the through hole K, and the back plate 00 includes a second edge B2 adjacent to the through hole K. The first edge B1 is located on the side of the second edge B2 close to the through hole K, and the distance between the first edge B1 and the second edge B2 is D, 0.2mm≤D≤0.6mm.

[0085] Specifically, this embodiment shows a scheme in which the quantum dot film 22 is extended into the through hole K when the quantum dot film 22 is introduced into the display module. The edge of the quantum dot film 22 adjacent to the through hole K is the first edge B1, and the edge of the back plate 00 adjacent to the through hole K is the second edge B2. The distance between the first edge B1 and the central axis of the through hole K is less than the distance between the second edge B2 and the central axis of the through hole K. That is, the quantum dot film 22 is further extended toward the central axis of the through hole K on the basis of covering the light-emitting element 30. If the distance between the first edge B1 and the second edge B2 is too small, for example, when D is less than 0.2 mm, at least part of the lateral light (blue light) of the first light-emitting element 31 toward the through hole K may be emitted from the gap between the quantum dot film 22 and the first light-emitting element 31, resulting in the appearance of blue light in the through hole K. If the distance between the first edge B1 and the second edge B2 is set to be larger, the quantum dot film 22 will occupy the space of the through hole K, and even affect the sensing effect of the photosensitive element in the through hole K on light. Therefore, the embodiment of the present invention sets the distance between the first edge B1 and the second edge B2 to 0.2mm≤D≤0.6mm, so that a certain distance is maintained between the first light-emitting element 31 and the first edge B1 of the quantum dot film 22, thereby avoiding or reducing the amount of blue light emitted from the gap between the quantum dot film 22 and the first light-emitting element 31 to the through hole K, and also avoiding the quantum dot film 22 from affecting the photosensitive effect of the photosensitive element in the through hole K, which is beneficial to improving the photosensitive accuracy of the photosensitive element. Optionally, 0.3mm≤D≤0.5mm.

[0086] Please refer to Figure 1 and Figure 2 The display panel provided in the embodiment of the present invention is a liquid crystal display panel. In an optional embodiment of the present invention, the display panel 10 includes a first display area A1 and a second display area A2 surrounding the first display area A1, and the first display area A1 overlaps with the through hole K along a direction perpendicular to the back plate 00; the refractive index of the liquid crystal in the first display area A1 is greater than the refractive index of the liquid crystal in the second display area A2.

[0087] The first display area A1 is the display area directly above the through hole K, and the second display area A2 is the conventional display area mentioned in the above embodiment. Optionally, in order to prevent the display area directly above the through hole K from being bluish, the structure of the display panel 10 in the first display area may be designed in other ways to achieve yellowing of the first display area. For example, a high refractive index liquid crystal is set in the first display area, so that the refractive index of the liquid crystal in the first display area is greater than the refractive index of the liquid crystal in the second display area, so that the first display area is yellowish. When blue light is directed to the first display area, the yellowish first display area will absorb part of the blue light, thereby improving the bluish problem of the first display area.

[0088] Fig.17 The figure shows a packaging schematic diagram of the first light-emitting element 31 and the second light-emitting element 32, wherein when the first light-emitting element 31 and the second light-emitting element 32 are blue light-emitting elements, the first light-emitting element 31 is packaged with yellow fluorescent glue 71, and the second light-emitting element 32 is packaged with transparent sealing glue 72. The first light-emitting element 31 and the second light-emitting element 32 are packaged with glue, which can improve the light-emitting reliability of the first light-emitting element 31 and the second light-emitting element 32. In particular, when the first light-emitting element 31 is packaged with yellow fluorescent glue 71 in the embodiment of the present invention, the light emitted by the first light-emitting element 31 is converted into white light after passing through the yellow fluorescent glue 71, thereby preventing the blue light emitted by the first light-emitting element 31 from being emitted into the through hole K, which is also conducive to improving the problem of blue light emission in the first display area corresponding to the through hole K.

[0089] Please refer to Fig.10 In an optional embodiment of the present invention, the display module also includes a first polarizer P1, which is located between the display panel 10 and the backlight module 20; the vertical distance between the surface of the light-emitting element 30 facing the display panel 10 and the surface of the first polarizer P1 facing the backlight module 20 is H, where H≥2mm.

[0090] Specifically, this embodiment limits the distance between the first polarizer P1 of the display module and the upper surface of the light emitting element 30 facing the display panel 10, so that the distance between the two is greater than or equal to 2 mm. When the distance between the two increases, it is equivalent to increasing the mixing distance of the light emitted by the light emitting element 30 before it is emitted to the first polarizer P1, so that the light can be fully mixed on the side of the first polarizer P1 facing the backlight module 20, so that the light provided to the display panel 10 through the backlight module 20 is more uniform, which is more conducive to improving the overall display uniformity of the display panel 10. In the actual production process, the distance between the first polarizer P1 and the light emitting element 30 can be increased by appropriately increasing the thickness of the adhesive between the backlight module 20 and the first polarizer P1.

[0091] In an optional embodiment of the present invention, H≤3mm. The larger the distance between the first polarizer P1 and the light emitting element 30, the better the light mixing effect. However, considering the thickness of the display module as a whole, this embodiment further limits the distance between the first polarizer P1 and the light emitting element 30 to be less than or equal to 3mm, so as to avoid the display module, which is conducive to improving the overall display uniformity of the product while achieving the requirement of product thinning.

[0092] Based on the same inventive concept, the present invention also provides a display device, Fig.18 The figure shows a schematic diagram of the structure of a display device provided by an embodiment of the present invention, and the display device 200 includes the display module 100 provided by the above embodiment of the present invention. The embodiment of the present invention is conducive to improving the display brightness of the display area corresponding to the through hole in the display device by increasing the arrangement density of the first light-emitting elements around the through hole, reducing the brightness difference between the display area corresponding to the through hole and other display areas in the display stage, and improving the uniformity of the display brightness of the conventional display area and the display area corresponding to the through hole of the display device, thereby helping to improve the display effect of the display device in the display stage. At the same time, since the area corresponding to the through hole can play a display role in the display stage, it is also conducive to improving the screen-to-body ratio of the display device to achieve a narrow frame design of the display module.

[0093] It should be noted that the embodiment of the display device 200 provided in the embodiment of the present invention can refer to the embodiment of the display module 100, and the repeated parts will not be repeated. The display device 200 provided in the present invention can be: a mobile phone, a tablet computer, a television, a monitor, a laptop computer, a digital photo frame, a navigator, and any other product or component with real functions.

[0094] It can be seen from the above embodiments that the display module and display device provided by the present invention achieve at least the following beneficial effects:

[0095] In the display module and display device provided by the present invention, the display panel is arranged in the light emitting direction of the backlight module, the backlight module is provided with a through hole, the backlight module includes a first area arranged around the through hole and a second area arranged around the first area, a first light emitting element is arranged in the first area, a second light emitting element is arranged in the second area, the first light emitting element is arranged around the through hole, and the arrangement density of the first light emitting element is greater than the arrangement density of the second light emitting element. When the arrangement density of the first light emitting element is large, it is beneficial to increase the overall light output of the first light emitting element in the first area. Since the first light emitting element is arranged around the through hole, the light emitted by the first light emitting element can be directed to the display area corresponding to the through hole, and the brightness of the display area corresponding to the through hole is compensated. The arrangement density of the first light emitting element is large, which is beneficial to improve the brightness compensation effect of the display area corresponding to the through hole, so it is beneficial to reduce the display brightness difference between the conventional display area and the display area corresponding to the through hole, improve the overall display uniformity of the display panel, and then help improve the overall display effect of the display panel.

[0096] Although some specific embodiments of the present invention have been described in detail by way of example, it will be appreciated by those skilled in the art that the above examples are for illustration only and are not intended to limit the scope of the present invention. It will be appreciated by those skilled in the art that the above embodiments may be modified without departing from the scope and spirit of the present invention. The scope of the present invention is defined by the appended claims.

Claims

1. A display module, characterized in that: include: A backlight module and a display panel, wherein the display panel is located in the light emitting direction of the backlight module; The backlight module is provided with a through hole, and the through hole penetrates the backlight module along the thickness direction of the backlight module; The backlight module comprises a first area and a second area surrounding the first area, and the first area surrounds the through hole; The backlight module includes a back plate and light-emitting elements arranged on a side of the back plate facing the display panel, the light-emitting elements include a first light-emitting element located in a first area and a second light-emitting element located in the second area, the first light-emitting elements are arranged around the through holes, and the arrangement density of the first light-emitting elements is greater than the arrangement density of the second light-emitting elements; The display module further includes a photosensitive element disposed in the through hole, and the photosensitive element and the first light-emitting element are activated in a time-sharing manner; The first light-emitting element includes a plurality of first sub-light-emitting elements and a plurality of second sub-light-emitting elements alternately arranged around the through hole, the plurality of first sub-light-emitting elements are connected in series, the plurality of second sub-light-emitting elements are connected in series, and the first sub-light-emitting elements and the second sub-light-emitting elements are respectively connected to different signal terminals; The second light emitting element includes a third sub-light emitting element and a fourth sub-light emitting element, the third sub-light emitting element surrounds the first light emitting element, and the fourth sub-light emitting element surrounds the third sub-light emitting element; The photosensitive element is in an off state, one of the first sub-light emitting element and the second sub-light emitting element is in an on state, and a driving current of the third sub-light emitting element is greater than a driving current of the fourth sub-light emitting element; Alternatively, the photosensitive element is in a closed state, the first sub-light-emitting element and the second sub-light-emitting element are both in an open state, and the driving current of the third sub-light-emitting element is smaller than the driving current of the fourth sub-light-emitting element.

2. The display module according to claim 1, characterized in that: The first light emitting element and the second light emitting element have different light emission patterns.

3. The display module according to claim 1, characterized in that: The first light-emitting element includes a light-emitting body and a reflective layer. The light-emitting body includes a first body and a second body arranged radially along the through hole. The first body is located between the second body and the through hole. The reflective layer is at least located on a surface of the second body away from the back plate.

4. The display module according to claim 3, characterized in that: The reflective layer is also located on at least a portion of the sidewall of the second body.

5. The display module according to claim 3, characterized in that: The first body includes a first surface, a second surface, and a third surface located between the first surface and the second surface along a first direction, wherein the third surface is connected to the first surface and the second surface respectively, the second surface is located on a side of the first surface facing the back plate, and the first direction is perpendicular to the back plate; The included angle between the first surface and the third surface is an obtuse angle.

6. The display module according to claim 1, characterized in that: It also includes a first optical film, which is located in the through hole and between the display panel and the first light-emitting element; the first optical film includes a first hollow portion that penetrates the first optical film along the thickness direction of the first optical film, and the orthographic projection of the first light-emitting element to the plane where the back plate is located surrounds the orthographic projection of the first hollow portion on the plane where the back plate is located; A first microstructure is disposed on a side of the first optical film facing the first light-emitting element; At least part of the light emitted by the first light emitting element is emitted into the first hollow portion through the first microstructure and is transmitted to the display panel.

7. The display module according to claim 6, characterized in that: Also includes a second optical film, the second optical film is located in the through hole and located on a side of the first optical film away from the first light-emitting element; the second optical film is a planar structure, the second optical film includes a first surface and a second surface arranged opposite to each other, and the second surface is located between the first surface and the first optical film; The first surface is parallel to the back plate, and the second surface is provided with a second microstructure; the light emitted from the first optical film passes through the second microstructure and then is emitted in a direction perpendicular to the first surface.

8. The display module according to claim 6, characterized in that: The backlight module further comprises an optical module disposed on a side of the light emitting element away from the back plate, and the optical module surrounds the first optical film along a direction parallel to the back plate; Along a direction perpendicular to the back plate, the optical module covers the second light emitting element and does not overlap with the first light emitting element.

9. The display module according to claim 1, characterized in that: The backlight module further comprises an optical module arranged on a side of the light emitting element away from the back plate, and the optical module covers the first light emitting element and the second light emitting element along a direction perpendicular to the back plate.

10. The display module according to claim 1, characterized in that: The light-emitting element is a blue light-emitting element; the backlight module further comprises a quantum dot film disposed on the side of the light-emitting element away from the back plate, and along a direction perpendicular to the back plate, the orthographic projection of the quantum dot film on the back plate covers the orthographic projection of the light-emitting element on the back plate; It also includes a first sealant, which is located between the quantum dot film and the back plate along a direction perpendicular to the back plate; along a direction parallel to the back plate, the first sealant surrounds the through hole, and the first sealant is located between the first light-emitting element and the through hole, and the first sealant is a non-transparent sealant.

11. The display module according to claim 10, characterized in that: The first sealing glue is white sealing glue.

12. The display module according to claim 1, characterized in that: The light emitting element is a blue light emitting element; the backlight module further comprises a quantum dot film disposed on a side of the light emitting element away from the back plate, and along a direction perpendicular to the back plate, the orthographic projection of the quantum dot film on the back plate covers the back plate; The quantum dot film includes a first edge adjacent to the through hole in its orthographic projection on the back plate, and the back plate includes a second edge adjacent to the through hole. The first edge is located on a side of the second edge close to the through hole, and a distance D between the first edge and the second edge is 0.2mm≤D≤0.6mm.

13. The display module according to claim 1, characterized in that: It also includes a first polarizer, which is located between the display panel and the backlight module; the vertical distance between the surface of the light-emitting element facing the display panel and the surface of the first polarizer facing the backlight module is H, where H≥2mm.

14. The display module according to claim 13, characterized in that: H≤3mm.

15. The display module according to claim 1, characterized in that: The display panel includes a first display area and a second display area surrounding the first display area, and the first display area overlaps with the through hole along a direction perpendicular to the back panel; the refractive index of the liquid crystal in the first display area is greater than the refractive index of the liquid crystal in the second display area.

16. A display device, characterized in that: A display module comprising any one of claims 1 to 15.

Images