CN117215118A

CN117215118A - Display module and display device

Info

Publication number: CN117215118A
Application number: CN202311171175.4A
Authority: CN
Inventors: 宋琼; 杨雁; 钟彩娇
Original assignee: Xiamen Tianma Microelectronics Co Ltd
Current assignee: Xiamen Tianma Microelectronics Co Ltd
Priority date: 2023-09-12
Filing date: 2023-09-12
Publication date: 2023-12-12

Abstract

The application discloses a display module and a display device, which belong to the technical field of display, wherein the display module comprises a backlight module and a display panel positioned at one side of a light emitting surface of the backlight module; the display module comprises a hollowed-out part provided with a photosensitive element, the hollowed-out part at least penetrates through the backlight module, the backlight module at least comprises a back plate, a backlight source and a plurality of optical films, and the optical films at least comprise a light guide plate; the backlight module further comprises a dimming component, the dimming component is arranged around the hollowed-out part, and the dimming component is positioned on one side of the photosensitive element, which faces the optical membrane, along the direction parallel to the light-emitting surface of the display module; each dimming structure group of the dimming component comprises a first dimming film layer and a second dimming film layer which are arranged in a stacked mode; the refractive index of the first dimming film layer is larger than that of the second dimming film layer. The display device comprises the display module. The application can prevent the light of the backlight module from leaking into the camera area, and can improve the display effect of the full screen while influencing the shooting quality.

Description

Display module and display device

Technical Field

The application relates to the technical field of display, in particular to a display module and a display device.

Background

With the development demand of full-screen, more and more electronic photosensitive devices are required to be integrated into a display device, such as a display area of the display device (e.g., a tablet, a smart phone, etc.), and an in-plane camera (i.e., an under-screen camera) is provided to increase the screen occupation ratio of the display area. In a liquid crystal display device, a backlight hole is generally formed in a backlight module, and a camera is disposed in the backlight hole. The problem to be solved at present is that the corresponding area of the camera needs to realize high transmittance, so that the imaging quality is relatively good; the backlight module needs to dig holes in the camera area, and when the backlight module displays, the digged holes cannot be used for transmitting light; when in display, the normal display area is basically consistent with the display effect of the camera area.

However, in the shooting mode of the existing equipment, light emitted from the light guide plate easily leaks to the camera area at the boundary between the display area and the camera area, so that light leakage is caused, the shooting effect is poor, and the imaging quality of the camera is affected; if the hole digging position of the camera area is subjected to glue sealing treatment, although the light leakage can be blocked by using the black glue, black edges are easy to form in a display mode, and the display quality of the whole screen is affected.

Therefore, the technical problem to be solved by the person skilled in the art is to provide the display module and the display device which can avoid the influence on the overall screen display effect while avoiding the light of the backlight module from leaking into the camera area to influence the shooting quality.

Disclosure of Invention

In view of this, the present application provides a display module and a display device, so as to solve the problem that the display quality and the shooting quality in the existing under-screen camera technology cannot be considered.

The application discloses a display module, comprising: the backlight module and the display panel are oppositely arranged, and the display panel is positioned at one side of the light emitting surface of the backlight module; the display module comprises a hollowed-out part, the hollowed-out part at least penetrates through the backlight module along the direction perpendicular to the light-emitting surface of the display module, and a photosensitive element is arranged in the hollowed-out part; the backlight module at least comprises a back plate, a backlight source and a plurality of optical films, wherein the backlight source and the optical films are positioned on one side of the back plate facing the display panel, and the optical films are stacked along the direction perpendicular to the light emitting surface of the display module; the optical films at least comprise a light guide plate; the backlight module further comprises a dimming component, the dimming component is arranged around the hollowed-out part, and the dimming component is positioned on one side of the photosensitive element, which faces the optical membrane, along the direction parallel to the light-emitting surface of the display module; the dimming component comprises at least one dimming structure group, and each dimming structure group comprises a first dimming film layer and a second dimming film layer which are stacked along the direction parallel to the light emitting surface of the display module; the refractive index of the first dimming film layer is larger than that of the second dimming film layer.

Based on the same inventive concept, the application also discloses a display device, which comprises the display module.

Compared with the prior art, the display module and the display device provided by the application have the advantages that at least the following effects are realized:

the display module provided by the application comprises a backlight module, a display panel and a photosensitive element, wherein the photosensitive element is positioned at one side deviating from the light emitting surface of the backlight module, and the photosensitive element can be a camera component. The hollowed-out part of the display module at least penetrates through the backlight module, and the photosensitive element is fixedly arranged in the hollowed-out part. The display module is used for shooting when the camera component works in a non-display mode, and the photosensitive element of the camera component does not work in a display mode, so that the display module is used for displaying pictures of a full screen. The backlight module still includes the subassembly of adjusting luminance, adjust luminance the position that the subassembly set up light leak easily around the fretwork portion between sensitization component and optical diaphragm, adjust luminance the subassembly and include at least one structure group of adjusting luminance, every structure group of adjusting luminance is including range upon range of setting up first membrane layer and the second membrane layer of adjusting luminance, the first membrane layer of adjusting luminance and the membrane layer of second that the refracting index is different form at least a pair of membrane layer of adjusting luminance, the structure group of adjusting luminance has the total reflection effect of light promptly, when the light transmission who follows the light guide plate outgoing to the easy light leak position in fretwork portion edge, can utilize at least one structure group of adjusting luminance of this position, form the total reflection interface, when the light that follows the light guide plate outgoing reaches the fretwork portion edge promptly, can totally reflect back to backlight module's play plain noodles one side, and then can significantly reduce the light leak at the fretwork portion edge, improve the problem of fretwork portion edge towards sensitization component, under shooting mode, can improve shooting effect, and the image quality of head, and at least one structure group in the subassembly is the light guide plate also does not influence the light leak light structure for the second membrane layer, can not cause the overall light-tight structure to the display screen. Therefore, the dimming component arranged at the position of the edge of the hollowed-out part, which is easy to leak light, can avoid light leakage, ensure shooting quality, and simultaneously ensure display quality, so that better shooting quality and display quality can be achieved.

Of course, it is not necessary for any one product to practice the application to achieve all of the technical effects described above at the same time.

Other features of the present application and its advantages will become apparent from the following detailed description of exemplary embodiments of the application, which proceeds with reference to the accompanying drawings.

Drawings

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

Fig. 1 is a schematic plan view of a display module according to an embodiment of the present application;

FIG. 2 is a schematic cross-sectional view of the structure of FIG. 1 in the direction A-A';

FIG. 3 is an optical path diagram of the dimmer pack interface of FIG. 2;

FIG. 4 is a schematic view of another cross-sectional structure in the direction A-A' of FIG. 1;

FIG. 5 is a graph of reflectance simulation using the dimmer pack of FIG. 4;

FIG. 6 is a schematic view of another cross-sectional structure in the direction A-A' of FIG. 1;

FIG. 7 is a schematic view of another cross-sectional structure in the direction A-A' of FIG. 1;

FIG. 8 is a schematic view of a partial enlarged structure of the J1 region in FIG. 7;

FIG. 9 is a partial light path diagram of the light modulator module of FIG. 8 incident therein;

FIG. 10 is a schematic view of another cross-sectional structure in the direction A-A' of FIG. 1;

FIG. 11 is a schematic view of a partial enlarged structure of the J2 region in FIG. 10;

fig. 12 is a schematic plan view of a display device according to an embodiment of the present application.

Detailed Description

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

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

Techniques, methods, and apparatus known to one of ordinary skill in the relevant art may not be discussed in detail, but are intended to be part of the specification where appropriate.

In all examples shown and discussed herein, any specific values should be construed as merely illustrative, and not a limitation. Thus, other examples of exemplary embodiments may have different values.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present application without departing from the spirit or scope of the application. Accordingly, it is intended that the present application covers the modifications and variations of this application provided they come within the scope of the appended claims (the claims) and their equivalents. The embodiments provided by the embodiments of the present application may be combined with each other without contradiction.

It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further discussion thereof is necessary in subsequent figures.

Referring to fig. 1-3 in combination, fig. 1 is a schematic plan view of a display module according to an embodiment of the present application, fig. 2 is a schematic cross-sectional view of A-A' in fig. 1, fig. 3 is an optical path diagram of an interface of a light adjusting component in fig. 2, and the display module 000 provided in this embodiment includes: the backlight module 10 and the display panel 20 are arranged oppositely, and the display panel 20 (not filled in fig. 2) is positioned at one side of the light emitting surface 10E of the backlight module 10;

the display module 000 comprises a hollowed-out part 00K, the hollowed-out part 00K at least penetrates through the backlight module 10 along a direction Z perpendicular to the light emergent surface of the display module 000, and a photosensitive element 30 is arranged in the hollowed-out part 00K;

the backlight module 10 at least comprises a back plate 101, a backlight source 102 and a plurality of optical films 103, wherein the backlight source 102 and the optical films 103 are positioned on one side of the back plate 101 facing the display panel 20, and the optical films 103 are stacked along a direction Z perpendicular to the light emitting surface of the display module 000; the plurality of optical films 103 at least include a light guide plate 1031;

the backlight module 10 further includes a light adjusting component 104, where the light adjusting component 104 is disposed around the hollow portion 00K, and the light adjusting component 104 is located at a side of the photosensitive element 30 facing the optical film 103 along a direction X parallel to the light emitting surface of the display module 000;

the light modulation assembly 104 includes at least one light modulation structure group 1040, and each light modulation structure group 1040 includes a first light modulation film layer 1040A and a second light modulation film layer 1040B that are stacked along a direction X parallel to the light emitting surface of the display module 000;

the refractive index of the first light modulation film layer 1040A is greater than the refractive index of the second light modulation film layer 1040B.

Specifically, the display module 000 provided in this embodiment includes a backlight module 10, a display panel 20 and a photosensitive element 30, where the photosensitive element 30 is located at a side facing away from the light-emitting surface 10E of the backlight module 10; alternatively, the photosensitive element 30 may be a camera module or a photosensor or the like. The present embodiment is exemplified by the configuration of the photosensitive element 30 as a camera module and the display module 000 as an under-screen camera. The display panel 20 is located at one side of the light emitting surface 10E of the backlight module 10, and the backlight module 10 and the display panel 20 can form a liquid crystal display module. The display module 000 includes a hollow portion 00K, the hollow portion 00K at least penetrates through the backlight module 10 along a direction Z perpendicular to the light emitting surface of the display module 000, and the photosensitive element 30 is fixedly disposed in the hollow portion 00K. The fixing connection mode of the photosensitive element 30 and the backlight module 10 is not particularly limited in this embodiment, the photosensitive element 30 and the iron frame or the back plate 101 of the backlight module 10 may be directly fixed, or the photosensitive element 30 and the iron frame of the backlight module 10 may be fixed by adhesive sealing (not illustrated in the drawings), and the adhesive sealing may be located in the hollowed-out portion 00K.

The backlight module 10 of the present embodiment at least includes a back plate 101 (not filled in fig. 2), a backlight source 102 and a plurality of optical films 103 located on a side of the back plate 101 facing the display panel 20, the back plate 101 may be understood as a part of a housing containing other film structures of the backlight module 10, for example, the back plate 101 may be understood as a part of an iron frame of the backlight module 10, and in the hollow portion 00K area, the iron frame may also form a light-shielding iron frame side wall, so that the shape and material of the back plate 101 are not limited specifically, and only needs to satisfy that structures such as space can be formed and support can be formed for the optical films. The backlight source 102 disposed on the back plate 101 facing the display panel 20 may be a side-in backlight source, the optical films 103 are stacked along the direction Z perpendicular to the light-emitting surface of the display module 000, the optical films 103 at least include a light guide plate 1031, and the backlight source 102 may be disposed at an edge position of one side of the light guide plate 1031 in a strip-shaped arrangement structure, so that the side-in backlight source 102 may be converted into a uniform surface light source, and light-emitting uniformity of the light-emitting surface 10E of the backlight module 10 is improved. The light guide plate 1031 may be an optical acrylic or polycarbonate plate, and light guide points (not shown) are printed on the bottom surface of the optical acrylic plate by laser engraving, V-shaped cross-grid engraving, UV screen printing technology, etc., and when light is guided, light emitted from the side-entry backlight 102 may be sucked by the optical acrylic plate, and when the light reaches each light guide point, reflected light may spread at various angles, and then be emitted from the front surface of the light guide plate 1031 (i.e., the surface of the light guide plate 1031 facing the display panel 10) after the reflection condition is destroyed. The light-homogenizing principle of the light-guiding plate 1031 is to make the light-guiding plate 1031 uniformly emit light through various light-guiding points with different densities and sizes. It is to be understood that the thickness of the light guide plate 1031 illustrated in fig. 2 in this embodiment does not represent the thickness in actual implementation, and may be designed according to actual requirements in actual implementation.

Optionally, the optical films 103 stacked in the direction Z perpendicular to the light emitting surface of the display module 000 in this embodiment may further include a reflective sheet 1032 located on a side of the light guide plate 1031 facing the back plate 101, and may further include a diffusion sheet 1033 and a brightness enhancement sheet 1034 located on a side of the light guide plate 103 away from the back plate 101, where the reflective sheet 1032 may be used to reflect the light exposed from the bottom surface back into the light guide plate 1031, so as to improve the light use efficiency, so that the light emitting efficiency is high and the power consumption is low under the condition of the same area of light emitting brightness. The diffusion sheet 1033 may include a plurality of light diffusion particles having different particle sizes, and the light diffusion particles can refract, scatter and reflect the light during the process of passing through the diffusion sheet 1033, so as to improve the diffusion effect of the backlight. Since the directivity of the light emitted from the diffusion sheet 1033 is poor, the prism structure on the brightness enhancement sheet 1034 above the diffusion sheet 1033 is required to correct the direction of the light, and refraction and reflection of the light are adopted to achieve the purposes of condensing the light and improving the brightness of the emitted light, so as to increase the service efficiency of the light emitted from the diffusion sheet 1033 and improve the brightness of the whole backlight module 10.

The operation modes of the display module 000 of the present embodiment may include a display mode and a non-display mode, for example, the photosensitive element 30 is a camera module, in the non-display mode, the camera module operates to take a picture, in the display mode, the photosensitive element 30 of the camera module does not operate, and the display module 000 performs a full-screen display.

However, in the non-display mode, in the edge region of the hollowed-out portion 00K, light emitted from the light guide plate 1031 is likely to leak to the region where the camera module is located, resulting in light leakage, which deteriorates the photographing effect. If the light-shielding glue is filled in the edge area of the hollowed-out portion 00K, the light-shielding glue can shield the light of the light guide plate 1031 and other film materials in the backlight module 10 at the edge of the hollowed-out portion 00K, but the backlight light is difficult to be incident to the display panel 20 at the position where the light-shielding glue is located, so that the area cannot be displayed in the display mode to form a black edge, and the display effect of the overall screen is easily affected although the space occupied by the filled light-shielding glue is small.

In order to solve the above-mentioned problem, the backlight module 10 according to the present embodiment further includes a light adjusting component 104, where the light adjusting component 104 is disposed around the hollow portion 00K, and along the direction X parallel to the light emitting surface of the display module 000, the light adjusting component 104 is located on a side of the photosensitive element 30 facing the optical film 103, that is, the light adjusting component 104 is disposed at a position at an edge of the hollow portion 00K, where light is easily leaked, and is disposed between the photosensitive element 30 and the optical film 103. The light modulation assembly 104 of the present embodiment includes at least one light modulation structure set 1040, along a direction X parallel to the light emitting surface of the display module 000, each light modulation structure set 1040 includes a first light modulation film layer 1040A and a second light modulation film layer 1040B that are stacked, i.e. the stacking direction of the first light modulation film layer 1040A and the second light modulation film layer 1040B is different from the stacking direction of the optical films 103, the plurality of optical films 103 are stacked along a direction Z perpendicular to the light emitting surface of the display module 000, and the first light modulation film layer 1040A and the second light modulation film layer 1040B are stacked along a direction X parallel to the light emitting surface of the display module 000.

In each light-dimming structure group 1040 disposed at the position of the edge of the hollowed-out portion 00K, the refractive index of the first light-dimming film layer 1040A is greater than that of the second light-dimming film layer 1040B, the first light-dimming film layer 1040A and the second light-dimming film layer 1040B with different refractive indexes form at least one pair of light-dimming film layers, namely one light-dimming structure group 1040, having a total reflection effect of light, when the light emitted from the light guide plate 1031 is transmitted to the position of the edge of the hollowed-out portion 00K, at least one light-dimming structure group 1040 at the position can be utilized to form a total reflection interface, that is, when the light emitted from the light guide plate 1031 reaches the edge of the hollowed-out portion 00K, the light emitted from the light guide plate 1031 can be totally reflected back to the light-emitting surface 10E side of the backlight module 10, so that the light emitted from the light guide plate 1031 at the edge of the hollowed-out portion 00K is greatly reduced, the light leakage problem of the edge of the hollowed-out portion 00K towards the light sensing element 30 is improved, in the shooting mode, the imaging quality of the camera is improved, and in the shooting mode, and the at least one light-dimming structure group 1040 in the display mode is also not influenced by the light-dimming structure group 1040, so that the light-dimming structure group is not influenced by the light-dimming structure layer 1040. Therefore, the light-dimming component 104 disposed at the position of the edge of the hollowed-out portion 00K, which is easy to leak light, can avoid light leakage, ensure the shooting quality, and simultaneously ensure the display quality, so as to give consideration to better shooting quality and display quality.

It should be understood that, in the present embodiment, the number of the dimming structures 1040 included in the dimming component 104 is not limited, and the dimming component 104 may include at least one dimming structure 1040, and in practice, the number of the dimming structures 1040 included in the dimming component 104 may be set according to the module space. In this embodiment, the materials for manufacturing the first light modulation film layer 1040A and the second light modulation film layer 1040B of the light modulation structure set 1040 are not particularly limited, the first light modulation film layer 1040A may be silicon nitride (SiNx, refractive index is about 1.82), and the second light modulation film layer 1040B may be silicon oxide (SiO ₂ Refractive index of about 1.48), the refractive index of the two materials is required to be different, and the materials are non-shading materials.

It should be noted that, fig. 1 and 2 of the present embodiment only schematically illustrate that the shape of the hollowed-out portion 00K may be a circular shape, but the shape is not limited to this shape, and the shape of the hollowed-out portion 00K may also be other shapes, which are not limited herein. The specific structures of the backlight module 10 and the display panel 20 in this embodiment are not limited to the above-mentioned structures, and can be specifically understood by referring to the structures of the liquid crystal display device in the related art, and the description of this embodiment is omitted herein.

In some alternative embodiments, please refer to fig. 1 and fig. 4 in combination, fig. 4 is a schematic cross-sectional view of the direction A-A' in fig. 1, in which the dimming component 104 includes N dimming structure groups 1040, and the N dimming structure groups 1040 are stacked along a direction X parallel to the light emitting surface of the display module 000; wherein N is an integer greater than or equal to 25.

When the N light modulation structure groups 1040 are stacked along the direction X parallel to the light emitting surface of the display module 000, a second light modulation film layer 1040B is included between two adjacent first light modulation film layers 1040A, and a first light modulation film layer 1040A is included between two adjacent second light modulation film layers 1040B.

The present embodiment illustrates that the number of the dimming structure groups 1040 included in the dimming component 104 can be set as much as possible, for example, the dimming component 104 includes N dimming structure groups 1040, where N is an integer greater than or equal to 25, and the N dimming structure groups 1040 are stacked along the direction X parallel to the light-emitting surface of the display module 000, so as to form the dimming component 104 with better total reflection effect. According to the research of the inventor, the light modulation component 104 with the total reflection function is formed by stacking a plurality of films with different refractive indexes, and the films with high refractive index and low refractive index are sequentially and alternately and periodically arrangedWherein n is _H Is the high refractive index of the first light modulation film 1040A, and n _L The low refractive index of the second dimming film 1040B, N is the number of dimming structure groups 1040 included in the dimming component 104; as can be seen from the above formula, the larger the difference between the high refractive index of the first light modulation film layer 1040A and the low refractive index of the second light modulation film layer 1040B, the higher the reflectivity r%, and the higher the number of light modulation structure groups 1040 included in the light modulation assembly 104. Therefore, the light modulation assembly 104 at least includes 25 light modulation structure groups 1040, that is, the light modulation assembly 104 formed by stacking 25 groups of the first light modulation film layers 1040A and the second light modulation film layers 1040B is beneficial to further improving the total reflection effect of the light modulation assembly 104 at the position where light is easily leaked at the edge of the hollowed-out portion 00K, so that the light leakage problem of the camera area can be further improved.

It can be appreciated that under the condition that the module space allows, the more and better the dimming structure group 1040 included in the dimming component 104 can be set, the structural performance of the module is not affected, the reflectivity of the dimming component 104 to light leakage can be improved to the greatest extent, and the shooting quality of the module is ensured.

In some alternative embodiments, please continue to refer to fig. 1 and fig. 4 in combination, in this embodiment, along a direction X parallel to the light-emitting surface of the display module 000, the thickness of the first light-adjusting film layer 1040A is D1, and the thickness of the second light-adjusting film layer 1040B is D2, wherein 120nm is equal to or less than D1 is equal to or less than 130nm, and 120nm is equal to or less than D2 is equal to or less than 130nm.

Along the direction X parallel to the light emitting surface of the display module 000, the thickness D1 of the first light modulation film layer 1040A and the thickness D2 of the second light modulation film layer 1040B are the same.

The present embodiment illustrates that the number of the dimming structure groups 1040 included in the dimming component 104 can be set as much as possible, for example, the dimming component 104 includes N dimming structure groups 1040, where N is an integer greater than or equal to 25, and the N dimming structure groups 1040 are stacked along the direction X parallel to the light-emitting surface of the display module 000, so as to form the dimming component 104 with better total reflection effect. At this time, the range of the thickness D1 of the first light modulation film layer 1040A and the range of the thickness D2 of the second light modulation film layer 1040B in each light modulation structure group 1040 may be substantially identical, for example, 120nm is less than or equal to D1 is less than or equal to 130nm,120nm is less than or equal to D2 is less than or equal to 130nm, preferably D1 may be about 125nm, D2 may be about 125nm (the thicknesses of D1 and D2 are generally 1/4 wavelength of the incident light, assuming that the wavelength of the incident light is about 500nm, the thickness D1 of the first light modulation film layer 1040A with a high refractive index may be about 125nm, the thickness D2 of the second light modulation film layer 1040B with a low refractive index may be about 125 nm), so that the sum of the thicknesses of one light modulation structure group may be about 250nm, when the number of light modulation structure groups 1040 included in the light modulation assembly 104 is at least 25, the total thickness of the light modulation assembly 104 may be at least 6.25 μm, and the total reflection effect of the light modulation structure group may be further improved by the application, and the total reflection light modulation structure may further be expected by the application.

As shown in fig. 5, fig. 5 is a graph of reflectance simulation after the dimming component shown in fig. 4 is adopted, the present inventors adopted the dimming component 104 to include 25 dimming structure groups 1040 stacked, wherein the thickness D1 of the first dimming film layer 1040A in each dimming structure group 1040 is 125nm, the thickness D2 of the second dimming film layer 1040B is 125nm, the first dimming film layer 1040A is silicon nitride SiNx, and the second dimming film layer 1040B is silicon oxide SiO ₂ For different viewsThe reflectance of the incident light of the whole wavelength band (the wavelength range of the whole wavelength band of the visible light of 400-700 nm) at the angle was simulated and tested on the dimming component 104 of the above structure, the abscissa in fig. 5 represents the wavelength of the incident light, the ordinate represents the reflectance, and the multiple curves represent different angles of view, resulting in the test results shown in the following table one:

table one:

polar angle	Mean reflectance R% in full band
		0°	12.9
10°	13.0
		20°	13.2
30°	12.4
		40°	12.8
50°	20.4
		60°	31.0
70°	43.8
		80°	63.5

As can be seen from the above table, the average reflectivity of the light incident from different wavelengths through the dimming component 104 with the above structure can be shown in the second column of the above table under different polar angles, for example, under a front viewing angle (i.e. the polar angle is 0 °), the average reflectivity r% of the whole band is 12.9%; at a large viewing angle (e.g., at an oblique viewing angle of 80 ° polar angle), the average reflectance R% of the full band is 63.5%; therefore, the reflectivity of the light gradually increases with the larger viewing angle, and the dimming components 104 stacked by the number of the 25 dimming structure groups 1040 and the dimming film layer with the thickness of 125nm can meet the expected effect of reflecting the light leakage even under the positive viewing angle with the minimum reflectivity.

It is appreciated that the first light modulation film layer 1040A and the second light modulation film layer 1040B in this embodiment may be manufactured by a plating process, such as PVD (Physical Vapor Deposition ) sputtering process, and the thicknesses of the first light modulation film layer 1040A and the second light modulation film layer 1040B manufactured by the process are substantially the same, so that the thickness of each film layer in the light modulation assembly 104 may be precisely controlled.

In some alternative embodiments, please continue to refer to fig. 1 and fig. 4, in this embodiment, the backlight module 10 includes a side plate 105, the side plate 105 is disposed around the hollow portion 00K, and in a direction X parallel to the light emitting surface of the display module 000, the side plate 105 is located between the light modulating component 104 and the photosensitive element 30;

the back plate 101 and the side plates 105 form a space for accommodating the backlight 102, the plurality of optical films 103, and the dimming component 104.

The embodiment illustrates that the backlight module 10 may further include a side plate 105, where the side plate 105 and the back plate 101 may be integrally formed to form a space for accommodating the backlight 102, the optical films 103, and the dimming component 104, for example, the side plate 105 and the back plate 101 may be integrally formed to be a frame structure, where the side plate 105 is disposed around the hollowed-out portion 00K, and in the direction X parallel to the light-emitting surface of the display module 000, the side plate 105 is disposed between the dimming component 104 and the photosensitive element 30, and the hollowed-out portion 00K may be shielded by heightening the side plate 105, so that the stability of the module is further ensured, and meanwhile, the possibility of light leakage around the hollowed-out portion 00K is reduced.

In some alternative embodiments, referring to fig. 1 and fig. 6 in combination, fig. 6 is a schematic view of another cross-sectional structure of the direction A-A' in fig. 1, in this embodiment, along a direction Z perpendicular to the light emitting surface of the display module 000, the light modulating component 104 includes a first end 104A far from the back plate 101, and the plurality of optical films 103 includes a first surface 103A far from the back plate; the distance H1 from the first end 104A to the back plate 101 is greater than the distance H2 from the first surface 103A to the back plate 101.

The present embodiment is explained in the description that, along the direction Z perpendicular to the light emitting surface of the display module 000, the dimming component 104 includes a first end 104A away from the side of the back plate 101, the plurality of optical films 103 includes a first surface 103A away from the side of the back plate, the first surface 103A may be understood as an upper surface of one optical film closest to the display panel 10 of the plurality of optical films 103, for example, a brightness enhancing film closest to the display panel 10 of the plurality of optical films 103, the first surface 103A may be an upper surface of a brightness enhancing film, for example, a top surface of another optical film closest to the display panel 10 of the plurality of optical films 103, and the first surface 103A may be a top surface of one optical film closest to the display panel 10 of the plurality of optical films 103. In this embodiment, the distance H1 from the first end 104A (the end of the dimming component 104 near the display panel 10) to the back plate 101 is greater than the distance H2 from the first surface 103A to the back plate 101, so that the height of the dimming component 104 is higher than the thickness of the stacked optical films 103, the dimming component 104 has a region with a part exceeding the first surface 103A, it can be further ensured that the light leakage of the backlight film can be totally reflected by the dimming component 104, and when the first end 104A is not as high as the first surface 103A, a gap is necessarily present between the backlight module 10 and the display panel 20, and the light leakage of the backlight film is easy to exit from the gap to the camera component with the hollowed-out portion 00K, resulting in residual light leakage.

In some alternative embodiments, please refer to fig. 1 and fig. 7 in combination, fig. 7 is a schematic cross-sectional view of fig. 1 along the direction A-A', and in this embodiment, an optical adhesive layer 40 is filled between the first surface 103A and the display panel 20.

The embodiment explains that when the light modulation component 104 has a portion exceeding the area of the first surface 103A, it can be further ensured that the light leakage of the backlight film material can be totally reflected by the light modulation component 104, the optical adhesive layer 40 can be filled between the first surface 103A and the display panel 20, and the optical adhesive layer 40 is transparent adhesive, so that the light emission of the backlight module 10 can not be affected, and the stability of the whole module can be improved.

In some alternative embodiments, please refer to fig. 1, fig. 7, fig. 8, fig. 9, fig. 8 is a schematic view of a partial enlarged structure of a region J1 in fig. 7, fig. 9 is a partial light path diagram of the light modulator in fig. 8, and in this embodiment, along a direction Z perpendicular to a light emitting surface of the display module 000, a side of the light modulator 104 away from the back plate 101 includes a plurality of grooves 104K.

The present embodiment explains that along the direction Z perpendicular to the light emitting surface of the display module 000, the light modulating element 104 includes a first end 104A far away from the back plate 101, and the first end 104A of the light modulating element 104 may be polished to form a plurality of grooves 104K on the side of the light modulating element 104 far away from the back plate 101, so that the surface of the side of the light modulating element 104 far away from the back plate 101 is an uneven surface, which is beneficial to enhancing the scattering (as indicated by the light path with arrow in fig. 9) of the total reflection light in the light modulating element 104, so as to avoid the total reflection light leaking into the light modulating element 104 from being directly concentrated and emitted from the first end 104A of the light modulating element 104 to the display panel 20, and affect the display quality of the display panel 10 in the area.

It is to be understood that the shape of the plurality of grooves 104K disposed on the side of the dimming component 104 away from the back plate 101 is not limited in this embodiment, and may be an irregular groove shape, and only needs to satisfy that light scattering can be achieved by the structure of the grooves 104K.

In some alternative embodiments, referring to fig. 1 and 10 in combination, fig. 10 is a schematic cross-sectional view of the direction A-A' in fig. 1, and in this embodiment, the light modulation device 104 includes a diffusion portion 106 along a direction Z perpendicular to the light emitting surface of the display module 000, and is located on a side away from the back plate 101.

In the embodiment, the first end 104A of the light modulation component 104 disposed around the hollowed-out portion 00K in the display module 000 is provided with the diffusion portion 106, that is, along the direction Z perpendicular to the light emitting surface of the display module 000, the side of the light modulation component 104 away from the back plate 101 includes the diffusion portion 106, and the diffusion portion 106 may be a structure made of a high-haze material, such as a structure doped with diffusion particles, so that bright lines can be dizziness through the diffusion portion 106, so that bright lines which may occur when total reflection light rays in the light modulation component 104 exit from the first end 104A of the light modulation component 104 are avoided, brightness uniformity of the upper portion and other areas of the light modulation component 104 is guaranteed, and further, uniformity of light emitting on the light emitting surface 10E side of the whole backlight module 10 is improved, and display quality is improved.

It will be appreciated that the specific material of the diffusion 106 is not limited in this embodiment, and only high haze materials that can vignetting the bright line need be satisfied.

Optionally, referring to fig. 1, 10 and 11 in combination, fig. 11 is a schematic view of a partial enlarged structure of a region J2 in fig. 10, and in this embodiment, an orthographic projection of the diffusing portion 106 on a plane of the back plate 101 covers an orthographic projection of the dimming component 104 on the plane of the back plate 101.

The embodiment explains that the orthographic projection of the diffusion portion 106, which plays a role of halation bright line, on the plane of the back plate 101 covers the orthographic projection of the dimming component 104 on the plane of the back plate 101, so that the width W1 of the diffusion portion 106 in the direction X parallel to the light emitting surface of the display module 000 is greater than or equal to the width W2 of the dimming component 104 in the direction X parallel to the light emitting surface of the display module 000, so that the first end 104A of the whole dimming component 104 can be covered by the diffusion portion 106 above the diffusion portion, and further, the brightness uniformity above the dimming component 104 and in other areas can be further improved, which is more beneficial to improving the display quality.

In some alternative embodiments, please refer to fig. 12, fig. 12 is a schematic plan view of a display device according to an embodiment of the present application, and the display device 111 according to the present embodiment includes a display module 000 according to the above embodiment of the present application. The embodiment of fig. 12 is only an example of a mobile phone, and the display device 111 is described, and it is to be understood that the display device 111 provided in the embodiment of the present application may be other display devices 111 having a display function, such as a computer, a television, and a vehicle-mounted display device, which is not particularly limited in the present application. The display device 111 provided in the embodiment of the present application has the beneficial effects of the display module 000 provided in the embodiment of the present application, and the specific description of the display module 000 in the above embodiments may be referred to specifically, and this embodiment is not repeated here.

According to the embodiment, the display module and the display device provided by the application have the following beneficial effects:

While certain specific embodiments of the application 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 application. It will be appreciated by those skilled in the art that modifications may be made to the above embodiments without departing from the scope and spirit of the application. The scope of the application is defined by the appended claims.

Claims

1. A display module, comprising: the backlight module and the display panel are oppositely arranged, and the display panel is positioned at one side of the light emitting surface of the backlight module;

the display module comprises a hollowed-out part, the hollowed-out part at least penetrates through the backlight module along the direction perpendicular to the light-emitting surface of the display module, and a photosensitive element is arranged in the hollowed-out part;

the backlight module at least comprises a back plate, a backlight source and a plurality of optical films, wherein the backlight source and the optical films are positioned on one side of the back plate facing the display panel, and the optical films are stacked along the direction perpendicular to the light emitting surface of the display module; the optical films at least comprise a light guide plate;

the backlight module further comprises a dimming component, the dimming component is arranged around the hollowed-out part, and is positioned on one side of the photosensitive element, which faces the optical film, along the direction parallel to the light-emitting surface of the display module;

the light adjusting assembly comprises at least one light adjusting structure group, and each light adjusting structure group comprises a first light adjusting film layer and a second light adjusting film layer which are arranged in a stacked manner along the direction parallel to the light emitting surface of the display module;

the refractive index of the first dimming film layer is larger than that of the second dimming film layer.

2. The display module assembly of claim 1, wherein the display module assembly comprises,

the light adjusting component comprises N light adjusting structure groups, and the N light adjusting structure groups are stacked along the direction parallel to the light emitting surface of the display module; wherein N is an integer greater than or equal to 25.

3. The display module of claim 2, wherein one of the second light modulation film layers is included between two adjacent first light modulation film layers, and one of the first light modulation film layers is included between two adjacent second light modulation film layers.

4. The display module of claim 1, wherein the first light modulation film layer has a thickness D1 and the second light modulation film layer has a thickness D2 along a direction parallel to the light emitting surface of the display module, wherein 120nm is equal to or less than 130nm, and 120nm is equal to or less than 2 nm.

5. The display module of claim 1, wherein the thickness of the first light modulation film layer is the same as the thickness of the second light modulation film layer along a direction parallel to the light emitting surface of the display module.

6. The display module assembly of claim 1, wherein the display module assembly comprises,

the backlight module comprises a side plate, wherein the side plate is arranged around the hollowed-out part, and is positioned between the light modulation component and the photosensitive element in a direction parallel to the light emitting surface of the display module;

the back plate and the side plates form a space for accommodating the backlight source, the optical films and the dimming component.

7. The display module assembly of claim 1, wherein the display module assembly comprises,

along the direction perpendicular to the light emitting surface of the display module, the light adjusting component comprises a first end far away from one side of the back plate, and the optical films comprise a first surface far away from one side of the back plate; the first end is spaced from the back plate a distance greater than the first surface.

8. The display module of claim 7, wherein an optical glue layer is filled between the first surface and the display panel.

9. The display module of claim 1, wherein the dimming component comprises a plurality of grooves on a side away from the back plate along a direction perpendicular to the light emitting surface of the display module.

10. The display module of claim 1, wherein the dimming component comprises a diffusion portion on a side away from the back plate along a direction perpendicular to the light emitting surface of the display module.

11. The display module assembly of claim 10, wherein the display module assembly comprises,

the orthographic projection of the diffusion part on the plane of the backboard covers the orthographic projection of the dimming component on the plane of the backboard.

12. A display device comprising a display module according to any one of claims 1-11.