Display module and display device

Abstract

A display module (15) and a display device. The display module (15) may comprise a display panel (2), a cover plate (1), a first light source (3), and a light guide mechanism (4); the cover plate (1), the light guide mechanism (4) and the display panel (2) are sequentially arranged in a first direction; the light guide mechanism (4) is located on a light exit side (36) of the display panel (2); the first light source (3) is located on at least one side of the light guide mechanism (4) in a second direction; the first direction is perpendicular to the cover plate (1), and the second direction is parallel to the cover plate (1); the first light source (3) is configured to emit infrared light, and the light guide mechanism (4) is configured to guide the light emitted from the first light source (3) to the cover plate (1). While performing normal display, the display module (15) and the display device can emit infrared light that promotes user health.

Description

Display module and display device

[0001] The present application claims priority from the Chinese patent application No. 202411083439.5 filed on August 7, 2024 and entitled "Display module and display device", the contents of which should be understood as incorporated by reference into the present application. TECHNICAL FIELD

[0002] The present disclosure relates to, but is not limited to, the field of display devices, and in particular, to a display module and a display device. BACKGROUND

[0003] Liquid Crystal Display (LCD), Organic Light Emitting Diode (OLED) and other display technologies have low blue light, wide viewing angle, circular polarization, anti-glare, automatic dimming and other eye protection technologies to achieve the purpose of eye protection. However, the above-mentioned technical knowledge makes optimization to reduce the harm caused by the "eye injury" of the display screen, which belongs to reducing the negative effects of the display screen. The light emitted by the display screen does not have a positive effect. SUMMARY

[0004] The following is a summary of the subject matter of the detailed description herein. This summary is not intended to limit the scope of the claims.

[0005] The display module provided by at least one embodiment of the present disclosure comprises a display panel, a cover plate, a first light source and a light guide mechanism.

[0006] The cover plate, the light guide mechanism and the display panel are sequentially arranged in a first direction, the light guide mechanism is located on the light emitting side of the display panel, the first light source is located on at least one side of the light guide mechanism in a second direction, the first direction is perpendicular to the cover plate, and the second direction is parallel to the cover plate.

[0007] The first light source is configured to emit infrared light, and the light guide mechanism is configured to guide the light emitted by the first light source towards the cover plate.

[0008] In some example embodiments, the orthographic projection of the light guide mechanism and the first light source on a first plane is located within the orthographic projection of the cover plate on the first plane, and the first plane is parallel to the cover plate.

[0009] The orthographic projection of the display panel on the first plane is arranged within the orthographic projection of the light guide mechanism on the first plane.

[0010] In some example embodiments, a back plate and a heat dissipation component are further included, the display panel is mounted on the back plate, and the heat dissipation component is arranged at an edge of the back plate, and the first light source is mounted on the heat dissipation component.

[0011] A projection of the heat dissipation component on the first plane is located within a projection of the cover plate on the first plane.

[0012] In some example embodiments, a plurality of dot structures are arranged on a side of the light guide mechanism close to the display panel, and the plurality of dot structures are arranged to convert the first light source into a surface light source.

[0013] In some example embodiments, a density of the dot structures is arranged to gradually increase from a side close to the first light source to a side away from the first light source in the second direction.

[0014] In some example embodiments, the dot structures are arranged to be recessed from a side of the light guide mechanism close to the display panel to a side away from the display panel.

[0015] The dot structures are arranged as dot-shaped dots.

[0016] Alternatively, the dot structures are arranged as groove dots, the groove dots extend along a third direction, and a plurality of the groove dots are arranged at intervals in the second direction, the third direction is perpendicular to the second direction and parallel to the cover plate.

[0017] In some example embodiments, an end surface of the light guide mechanism close to the display panel is arranged as a light guide surface, an angle between an end surface of the dot structure close to the first light source and the light guide surface is a light receiving angle, and the light receiving angle is arranged to be 30° to 60°.

[0018] In some example embodiments, the light guide mechanism is arranged as a plate material parallel to the cover plate and with equal thickness.

[0019] In some example embodiments, the light guide mechanism includes a first light guide part and a second light guide part, one end of the first light guide part in the second direction is connected to the second light guide part, and the other end extends to the first light source.

[0020] A projection of the first light guide part on the first plane does not overlap with a projection of the display panel on the first plane, a thickness of the first light guide part is arranged to gradually decrease from an end close to the first light source to an end close to the first light guide part, and the first plane is parallel to the cover plate.

[0021] The second light guide portion has a thickness smaller than that of the first light guide portion, and a projection of the second light guide portion on the first plane overlaps with a projection of the display panel on the first plane.

[0022] In some example embodiments, further comprising two layers of anti-reflection films,

[0023] The light guide mechanism and the display panel are spaced apart, and an air layer is formed between the light guide mechanism and the display panel.

[0024] The light guide mechanism is provided with a layer of the anti-reflection film on an end surface close to the air layer, and the display panel is provided with another layer of the anti-reflection film on an end surface close to the air layer, and the anti-reflection films are configured to reduce reflection of light by the air layer.

[0025] In some example embodiments, further comprising a first optically transparent adhesive layer between the light guide mechanism and the display panel, and the light guide mechanism and the display panel are bonded by the first optically transparent adhesive layer.

[0026] In some example embodiments, a ratio of refractive indices of the light guide mechanism and the first optically transparent adhesive layer is set to 1 to 1.5.

[0027] In some example embodiments, the refractive index of the light guide mechanism is set to 1.5 to 1.7, and the refractive index of the first optically transparent adhesive layer is 1.2.

[0028] In some example embodiments, further comprising a plurality of first films, and the plurality of first films are located on an end surface of the light guide mechanism close to the display panel, and a projection of one of the dot structures on the cover plate is located within a projection of one of the first films on the cover plate.

[0029] In some example embodiments, further comprising a protective layer between the light guide mechanism and the first optically transparent adhesive layer.

[0030] In some example embodiments, the protective layer comprises a protective substrate and a bonding adhesive stacked in the first direction, and the bonding adhesive is located on a side of the protective substrate close to the light guide mechanism.

[0031] A ratio of an extension length of the dot structure in the first direction to an extension length of the bonding adhesive in the first direction is set to 0.1 to 10.

[0032] In some example embodiments, the light guide mechanism is configured as a hard light guide plate, and the extension length of the bonding adhesive in the first direction is set to 0.01 to 0.05 mm.

[0033] In some example embodiments, the light guide mechanism is a soft light guide film, and the extension length of the adhesive in the first direction is 0.001-0.05 mm.

[0034] In some example embodiments, the light guide mechanism includes a flat plate segment and a plurality of bent segments, the flat plate segment has a projection on the cover plate that overlaps with a projection of the display panel on the cover plate, and a plurality of the dot structures are arranged on the flat plate segment.

[0035] One end of each of the plurality of bent segments is connected to one end of the flat plate segment in the second direction and arranged in a third direction in sequence, the third direction is perpendicular to the second direction and parallel to the cover plate.

[0036] The other end of each of the plurality of bent segments is bent towards the first light source and arranged in the first direction in a stack.

[0037] In some example embodiments, the heat dissipation component and the back plate are arranged as an integral piece.

[0038] At least one embodiment of the present disclosure provides a display device, which includes a housing and the display module described above, and the display module is mounted on the housing.

[0039] Other aspects can become apparent after reading and understanding the accompanying drawings and detailed description.

[0040] SUMMARY

[0041] FIG. 1 is a schematic diagram of a display module according to an example embodiment;

[0042] FIG. 2 is a spectral diagram of the display module in FIG. 1;

[0043] FIG. 3 is a schematic diagram of a light guide mechanism according to an example embodiment;

[0044] FIG. 4 is a schematic diagram of a cross section in A-A direction of FIG. 3;

[0045] FIG. 5 is a schematic diagram of another light guide mechanism according to an example embodiment;

[0046] FIG. 6 is a schematic diagram of a cross section in B-B direction of FIG. 5;

[0047] FIG. 7 is a schematic diagram of a use state of another display module according to an example embodiment;

[0048] FIG. 8 is a schematic diagram of another light guide mechanism according to an example embodiment;

[0049] FIG. 9 is a schematic diagram of another display module according to an example embodiment;

[0050] Fig. 10 is a schematic view of another light guide mechanism according to the present exemplary embodiment;

[0051] Fig. 11 is a schematic view of still another light guide mechanism according to the present exemplary embodiment;

[0052] Fig. 12 is a schematic view of another display module according to the present exemplary embodiment;

[0053] Fig. 13 is a schematic view of still another display module according to the present exemplary embodiment;

[0054] Fig. 14 is a partial schematic view of the light guide mechanism in Fig. 13;

[0055] Fig. 15 is a schematic view of the light guide mechanism in Fig. 13 adhered to a first optically transparent adhesive layer;

[0056] Fig. 16 is a schematic view of another display module according to the present exemplary embodiment;

[0057] Fig. 17 is a schematic view of the light guide mechanism in Fig. 16 adhered to a protective layer;

[0058] Fig. 18 is a schematic view of a folded state of still another light guide mechanism according to the present exemplary embodiment;

[0059] Fig. 19 is a schematic view of a C-C cross section of Fig. 18;

[0060] Fig. 20 is a schematic view of an unfolded state of the light guide mechanism in Fig. 18;

[0061] Fig. 21 is a schematic view of a first preparation of the light guide mechanism in Fig. 18;

[0062] Fig. 22 is a schematic view of still another display module according to the present exemplary embodiment;

[0063] Fig. 23 is a schematic view of another display module according to the present exemplary embodiment.

[0064] Explanation of reference signs: 1 - cover plate; 2 - display panel; 3 - first light source; 4 - light guide mechanism; 5 - back plate; 6 - backlight assembly; 7 - second light source; 8 - backlight guide mechanism; 9 - air layer; 10 - second optically transparent adhesive layer; 11 - dot structure; 12 - mounting groove; 13 - light exit surface; 14 - light guide surface; 15 - display module; 16 - user; 17 - second light guide portion; 18 - first light guide portion; 19 - third light guide portion; 20 - anti-reflection film; 21 - polarizing layer; 22 - first optically transparent adhesive layer; 23 - first film; 24 - low adhesion area; 25 - high adhesion area; 26 - protective layer; 27 - bonding adhesive; 28 - protective substrate; 29 - flat plate section; 30 - bending section; 31 - display area; 32 - bending line; 33 - bottom plate; 34 - side plate; 35 - heat dissipation assembly; 36 - light exit side.

[0065] DETAILED DESCRIPTION

[0066] In order to make the objects, technical solutions and advantages of the present disclosure clearer, below the embodiments of the present disclosure will be described in detail with reference to the drawings. Note that the embodiments can be implemented in multiple different forms. One of ordinary skill in the art can easily understand the fact that the means and content can be changed into various forms without departing from the spirit and scope of the present disclosure. Therefore, the present disclosure should not be interpreted as being limited to the content described in the following embodiments. The embodiments in the present disclosure and the features in the embodiments can be combined with each other arbitrarily without conflict.

[0067] The scale of the drawings in this disclosure can be used as a reference in the actual process, but is not limited thereto. For example, the width-length ratio of the channel, the thickness and spacing of each film layer, and the width and spacing of each signal line can be adjusted as needed. The number of pixels in the display panel and the number of sub-pixels in each pixel are also not limited to the number shown in the figure. The drawings described in this disclosure are only schematic diagrams, and one embodiment of this disclosure is not limited to the shapes or values shown in the drawings.

[0068] In this specification, ordinal numbers such as "first", "second", and "third" are used to avoid confusion among components, and are not intended to limit in terms of numbers.

[0069] In this specification, in order to facilitate the description and simplify the description, words indicating the orientation or positional relationship such as "middle", "upper", "lower", "front", "rear", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like are used to describe the positional relationship of the components with reference to the drawings, and are not intended to indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on this disclosure. The positional relationship of the components is appropriately changed according to the direction of describing each component. Therefore, it is not limited to the words described in the specification, and can be appropriately changed according to the situation.

[0070] In this specification, unless explicitly defined and limited otherwise, the terms "mount", "connected", and "connected" should be broadly understood. For example, it can be fixedly connected, or detachably connected, or integrally connected; it can be mechanically connected, or electrically connected; it can be directly connected, or indirectly connected through an intermediate, or communication between two elements. For those skilled in the art, the specific meaning of the above terms in this disclosure can be understood according to the specific circumstances.

[0071] In this specification, a transistor refers to an element including at least a gate electrode, a drain electrode, and a source electrode. The transistor has a channel region between the drain electrode (drain electrode terminal, drain region, or drain electrode) and the source electrode (source electrode terminal, source region, or source electrode), and current can flow through the drain electrode, the channel region, and the source electrode. Note that in this specification, the channel region refers to a region through which current mainly flows.

[0072] In this specification, the first electrode can be a drain electrode, and the second electrode can be a source electrode, or the first electrode can be a source electrode, and the second electrode can be a drain electrode. In the case of using a transistor with opposite polarity or in the case of changing the current direction in the circuit operation, the functions of "source electrode" and "drain electrode" are sometimes exchanged with each other. Therefore, in this specification, "source electrode" and "drain electrode" can be exchanged with each other, and "source terminal" and "drain terminal" can be exchanged with each other.

[0073] In this specification, "electrically connected" includes the case where elements are connected through an element having some electrical action. The element having some electrical action is not particularly limited as long as it can transmit and receive an electrical signal between the elements to be connected. Examples of the element having some electrical action include not only an electrode and a wiring but also a switching element such as a transistor, a resistor, an inductor, a capacitor, and another element having some function.

[0074] In this specification, "parallel" means a state where the angle formed between two straight lines is greater than or equal to -10° and less than or equal to 10°, and thus a state where the angle is greater than or equal to -5° and less than or equal to 5° is also included. In addition, "perpendicular" means a state where the angle formed between two straight lines is greater than or equal to 80° and less than or equal to 100°, and thus a state where the angle is greater than or equal to 85° and less than or equal to 95° is also included.

[0075] In this specification, "film" and "layer" can be interchanged with each other. For example, "a conductive layer" can be replaced with "a conductive film". Similarly, "an insulating film" can be replaced with "an insulating layer".

[0076] In this specification, a triangle, a rectangle, a trapezoid, a pentagon, or a hexagon is not strictly a triangle, a rectangle, a trapezoid, a pentagon, or a hexagon, and can be an approximately triangle, a rectangle, a trapezoid, a pentagon, or a hexagon. There can be some small deformation due to a tolerance, a rounded corner, a rounded side, or deformation.

[0077] In this specification, "about" means that a numerical value is not strictly limited, and a value within a range of a process and a measurement error is allowed.

[0078] At present, display technologies such as liquid crystal display (LCD), organic light emitting diode (OLED), and the like have eye protection technologies such as low blue light, wide viewing angle, circular polarization, anti-glare, and automatic dimming, but these technologies are optimizations for reducing the harm of display screens to the eyes, and belong to the category of reducing negative effects. No technology has been found that truly gives the light of a display screen a positive effect on the user, such as the positive effect of the light of a display screen promoting eye health.

[0079] The hardware and software of electronic products, the content of which is emerging, the user's screen use time is also getting longer, and the outdoor activity time is gradually shortened. This social phenomenon leads to the increasing incidence of myopia, weakness, and strabismus of users, which are caused by the negative effects of the light of the display screen. The light outside the red light, which is in the wavelength range of 0.77 μm to 1000 μm in the spectrum, is called infrared light, also known as infrared ray. Infrared light belongs to the category of electromagnetic waves, which is a kind of electromagnetic wave with strong heat effect. The wavelength of infrared light is shorter than that of radio wave and longer than that of visible light, and the infrared light cannot be seen by the naked eye. The wavelength range of infrared light is very wide, and people divide the infrared rays of different wavelength ranges into near-infrared, mid-infrared and far-infrared regions, and the corresponding wavelength electromagnetic waves are called near-infrared light, mid-infrared light and far-infrared light. For example, in the medical field, infrared light is often divided as follows: 0.76-3 microns of near-infrared light, 3-30 microns of mid-infrared light, and 30-1000 microns of far-infrared light. The applicant found that far-infrared light has been applied in the medical field. Far-infrared light has the ability to excite intracellular water molecules, activate mitochondria, promote blood circulation, and activate cell functions, which has an advantage over other wave bands of light in the health field. Far-infrared therapy instruments and far-infrared therapy patches have appeared on the market.

[0080] FIG. 1 is a schematic diagram of a display module according to an example embodiment. The display module can include a display panel 2, a cover plate 1, a first light source 3, and a light guide mechanism 4. The cover plate 1, the light guide mechanism 4, and the display panel 2 can be sequentially arranged in a first direction. The light guide mechanism 4 can be located on the light emitting side 36 of the display panel 2. The light emitting side 36 of the display panel 2 can be the side from which the display panel 2 emits light. The first light source 3 can be located on at least one side of the light guide mechanism 4 in a second direction. The first direction can be perpendicular to the cover plate 1, and the second direction can be parallel to the cover plate 1. The first light source 3 can emit infrared light. The light guide mechanism 4 is configured to guide the light emitted by the first light source 3 towards the cover plate 1. Thus, the display module can emit infrared light that promotes user health without affecting image display, which has a positive impact on users.

[0081] In some example embodiments, as shown in FIG. 1, the display module further includes a back plate 5 and a backlight assembly 6. The back plate 5 can enclose a mounting slot 12. The backlight assembly 6 and the display panel 2 can be located in the mounting slot 12. The cover plate 1 and the light guide mechanism 4 are located on the side of the display panel 2 away from the backlight assembly 6 and are located outside the mounting slot 12. The backlight assembly 6 includes a second light source 7 and a backlight guide mechanism 8. The second light source 7 can emit display light. The backlight guide mechanism 8 can guide the light emitted by the second light source 7 to propagate towards the display panel 2. The light emitted by the second light source 7 displays an image through the display panel 2 and continues to be emitted by the cover plate 1.

[0082] In some example embodiments, as shown in FIG. 1, a second optically transparent adhesive layer 10 can be provided between the cover plate 1 and the light guide mechanism 4, and the cover plate 1 and the light guide mechanism 4 are bonded by the second optically transparent adhesive layer 10. The cover plate 1 can be made of glass, and the second optically transparent adhesive layer 10 can be made of optically transparent adhesive. Both the cover plate 1 and the second optically transparent adhesive layer 10 can transmit light.

[0083] In some example embodiments, as shown in FIG. 1, in the working state of the display module, the first light source 3 and the second light source 7 work simultaneously, the light emitted by the second light source 7 irradiates the display panel 2, and an image is formed on the display panel 2. The display light, as shown by the solid arrows, sequentially passes through the light guide mechanism 4, the second optically transparent adhesive layer 10, and the cover plate 1, and is emitted from the display module and received by the user. At the same time, the first light source 3 can be a packaged LED, the light emitted by the first light source 3 is infrared light, and the infrared light irradiates the cover plate 1 through the light guide mechanism 4. As shown by the dashed arrows, the infrared light passes through the second optically transparent adhesive layer 10 and the cover plate 1 and is emitted from the display module. Thus, the display module can emit display light visible to the naked eye and infrared light invisible to the naked eye at the same time, and both can be received by the user's eyes. The user receives the display image, ensuring normal display function, and the infrared light irradiation promotes user health. Moreover, the image formed by the display module does not change due to the switching and changes of the first light source 3, but is limited by the light emitted by the second light source 7. In addition, the first light source 3 can work alone, i.e., when the second light source 7 does not work, the first light source 3 is turned on, and the display module only emits infrared light, which has a therapeutic effect on the user's eyes and face.

[0084] FIG. 2 is a spectral diagram of the display module in FIG. 1. In some example embodiments, as shown in FIG. 2, the horizontal axis in FIG. 2 is wavelength, and the vertical axis is light intensity. The dashed line is the spectral diagram of the display light, and the solid line is the spectral diagram of the infrared light. As can be seen, the display module can emit uniform and high-intensity infrared light, and the infrared light does not affect the normal display function of the display module, and the display clarity and image quality are not reduced, and the brightness is not lost.

[0085] Figure 3 is a schematic diagram of a light guide according to an example embodiment, and Figure 4 is a schematic diagram of a cross-section of the light guide of Figure 3 along the A-A line. In some example embodiments, the light guide 4 can be a flat plate as shown in Figures 1, 3 and 4. The light guide 4 can be made of a high polymer material with high transparency, such as Polymethyl Methacrylate (PMMA) or Polycarbonate (PC). The light guide 4 can be made by injection molding. The refractive index of the light guide 4 can be 1.5. The light guide 4 can be parallel to the cover plate 1. The light guide 4 can be a plate with uniform thickness, i.e. the thickness (H) of the light guide 4 can be uniform along the light guide 4. The thickness (H) of the light guide 4 can be the dimension of the light guide 4 along the first direction. The thickness (H) of the light guide 4 can be slightly larger than the thickness (L) of the first light source 3. For example, the thickness (H) of the light guide 4 can be 1.3mm or 1.6mm. The thickness (L) of the first light source 3 can be 1.2mm or 1.5mm. The first light source 3 with a thickness (L) of 1.2mm can be a commonly used specification. The first light source 3 with a thickness (L) smaller than 1.2mm can be less commonly used.

[0086] In some example embodiments, the end surface of the light guide 4 facing the first light source 3 can be the light entry surface of the light guide 4 as shown in Figures 1 and 3. The end surface of the light guide 4 away from the display panel 2 can be the light exit surface 13. The end surface of the light guide 4 close to the display panel 2 can be the light guide surface 14. The light guide surface 14 can have a plurality of dot structures 11. The light from the first light source 3 can enter the light guide 4 through the light entry surface of the light guide 4. When the light hits the dot structures 11, the light can be reflected. The reflected light can be diffused in various directions. The light can be reflected between the light exit surface 13 and the light guide surface 14 until the light exits the light exit surface 13.

[0087] In some example embodiments, as shown in FIG. 1 and FIG. 3, the first light source 3 can be a point light source or a line light source, and the light guide mechanism 4 can convert the point light source or the line light source into a surface light source, so that the output light source of the first light source 3 is a surface light source and is emitted to the cover plate 1. The adjustment of the light density can be achieved by adjusting the dot density. In this example, the density of the dot structure 11 gradually increases from the side close to the first light source 3 to the side away from the first light source 3 in the second direction, that is, the closer to the first light source 3, the smaller the density of the dot structure 11, and the farther away from the first light source 3, the greater the density of the dot structure 11. The infrared light gradually decreases in the transmission process due to emission and loss, and the density of the dot structure 11 needs to be increased to ensure the uniformity of the overall light energy emission far away from the first light source 3. The density of the dot structure 11 can be: the proportion of the dot area to the area of the light guide plate in a local part of the light guide surface 14. In some example embodiments, the light guide mechanism 4 can be divided into a first area (A1), a second area (A2), and a third area (A3) arranged in sequence in the second direction, wherein the density of the dot structure 11 in the first area (A1), the second area (A2), and the third area (A3) decreases in sequence, and the ratio of the density of the dot structure 11 in the first area (A1) and the second area (A2) can be 3 to 5, and the ratio of the density of the dot structure 11 in the second area (A2) and the third area (A3) can be 2 to 3. The density of the dot structure 11 in the first area (A1) can be 30% to 50%, the density of the dot structure 11 in the second area (A2) can be 10% to 15%, and the density of the dot structure 11 in the third area (A3) can be 3% to 7%. In this example, the density of the dot structure 11 in the first area (A1) can be 40%, the density of the dot structure 11 in the second area (A2) can be 13%, and the density of the dot structure 11 in the third area (A3) can be 5%.

[0088] In some example embodiments, as shown in FIG. 3 and FIG. 4, the dot structures 11 can be dot-shaped dots, which are arranged non-uniformly on the light guide surface 14 to form a two-dimensional distribution. The dot structures 11 can be formed by recessing the light guide surface 14. The dot structures 11 can be conical grooves. The diameter of the circle formed by the dot structures 11 on the light guide surface 14 can be 20 microns to 50 microns. The density of the dot structures 11 gradually increases from the side close to the first light source 3 to the side away from the first light source 3 in the second direction. In the third direction, the density of the dot structures 11 remains substantially constant. In this example, the viewing angle of the display module is 0°, i.e., the user's face is directly opposite the display module. The angle between the end surface of the dot structures 11 close to the first light source 3 and the light guide surface 14 is the light-incident angle a, where the light-incident angle a = 45°. The height of the dot structures 11 is the dimension of the dot structures 11 in the first direction. The greater the height of the dot structures 11, the stronger the light-emitting capability. However, it should be noted that the greater the height of the dot structures 11, the greater the visibility of the dot structures 11, i.e., the dot structures 11 are visible in the normal display image. Therefore, it is necessary to reduce the height and size of the dot structures 11 as much as possible to reduce the risk of visibility of the dot structures 11.

[0089] FIG. 5 is a schematic diagram of another light guide mechanism of the example embodiments, and FIG. 6 is a schematic diagram of a B-B cross section in FIG. 5. In some example embodiments, as shown in FIG. 5, the dot structures 11 can be groove dots, which are arranged non-uniformly on the light guide surface 14 to form a one-dimensional distribution. The dot structures 11 can be formed by recessing the light guide surface 14. The dot structures 11 can be long strip grooves. The dot structures 11 extend in the third direction. A plurality of dot structures 11 are arranged at intervals in the second direction. The cross section of the groove surrounded by the dot structures 11 can be a triangle. The grooves surrounded by the plurality of dot structures 11 are parallel to each other and flush at both ends in the first direction. On the side close to the first light source 3, the distance between two adjacent dot structures 11 is large. On the side away from the first light source 3, the distance between two adjacent dot structures 11 is small. The density of the dot structures 11 gradually increases from the side close to the first light source 3 to the side away from the first light source 3 in the second direction. In the third direction, the density of the dot structures 11 remains constant. In some example embodiments, the viewing angle of the display module is 0°, i.e., the user's face is directly opposite the display module. The angle between the end surface of the dot structures 11 close to the first light source 3 and the light guide surface 14 is the light-incident angle a, which can be 30° to 60°. In this example, the light-incident angle a = 45°.

[0090] Figure 7 is a schematic diagram of another use state of the display module of the present exemplary embodiment. In some exemplary embodiments, the viewing angle of the display module 15 is β, which is the angle between the line connecting the user 16 and the center of the display module 14 and the line perpendicular to the display module 15. The value of β is not 0, and the user 16 is not directly facing the display module 15, but is viewing the display module 15 at an angle. The light receiving angle of the dot structure 11 is also adjusted accordingly. In the present example, when the refractive index of the light guide mechanism is about 1.5, the viewing angle (β) is 45°, and the light receiving angle of the dot structure is 14°. Regardless of whether the dot structure is one-dimensional or two-dimensional, the design of the light receiving angle of the dot structure needs to take into account the refractive index of the light guide mechanism and the product use angle (viewing angle) in the use scenario.

[0091] In some exemplary embodiments, as shown in Figures 1 and 3, the orthographic projection of the light guide mechanism 4 and the first light source 3 on the first plane (P1) is located within the orthographic projection of the cover plate 1 on the first plane (P1). The first plane (P1) can be parallel to the cover plate 1, and the first plane (P1) is also parallel to the light guide mechanism 4, so that the cover plate 1 can cover the light guide mechanism 4 and the first light source 3. At the same time, the orthographic projection of the display panel 2 on the first plane (P1) can be located within the orthographic projection of the light guide mechanism 4 on the first plane (P1), so that the light guide mechanism 4 can cover the display panel 2.

[0092] Figure 8 is a schematic view of another light guide mechanism of the present exemplary embodiments, and Figure 9 is a schematic view of another display module of the present exemplary embodiments. In some exemplary embodiments, as shown in Figures 8 and 9, the light guide mechanism 4 can be a non-uniform thickness plate, and the thickness of the light guide mechanism 4 can be adjusted according to the location to achieve the purpose of thinning the display module on the basis of the size of the first light source 3. The light guide mechanism 4 can include a first light guide portion 18 and a second light guide portion 17, one end of the first light guide portion 18 in the second direction is connected to the second light guide portion 17, and the other end is close to the first light source 3, and the thickness of the second light guide portion 17 is less than the thickness of the first light guide portion 18. The second light guide portion 17 can be a uniform thickness planar plate, and a plurality of dot structures 11 can be located on the second light guide portion 17, and the thickness of the second light guide portion 17 can be H1, and the value of H1 can be 0.4mm to 0.8mm. The thickness of the first light guide portion 18 gradually decreases from the end close to the first light source 3 to the end close to the first light guide portion 18, so that the cross section of the first light guide portion 18 can be a symmetrical horn shape. The thickness of the first light guide portion 18 at the end away from the first light source 3 can be H2, wherein H2>H1, and the ratio of H2 and H1 can be 1.5 to 30, and the value of H2 can be close to the thickness of the first light source 3. In addition, the light guide mechanism 4 further includes a third light guide portion 19, and the third light guide portion 19 is located at the end of the first light guide portion 18 away from the second light guide portion 17, and the third light guide portion 19 can be a uniform thickness plate, and the thickness of the third light guide portion 19 can be H3, and the value of H3 is equal to the thickness of the first light guide portion 18 at the end close to the first light source 3 (H2).

[0093] In some exemplary embodiments, as shown in Figures 8 and 9, the second light guide portion 17 is parallel to the cover plate 1, the second light guide portion 17 is between the cover plate 1 and the display panel 2, and the orthographic projection of the second light guide portion 17 on the cover plate 1 overlaps the orthographic projection of the display panel 2 on the cover plate 1. The second light guide portion 17 can be bonded to the cover plate 1 through the second optically transparent adhesive layer 10, and the second light guide portion 17 is spaced apart from the display panel 2. The orthographic projection of the first light guide portion 18 on the cover plate 1 does not overlap the orthographic projection of the display panel 2 on the cover plate 1. The third light guide portion 19 is close to the first light source 3, the third light guide portion 19 receives the light of the first light source 3, the light of the first light source 3 is transmitted through the first light guide portion 18 to the second light guide portion 17, and then interacts with the dot structure 11 on the second light guide portion 17.

[0094] Figure 10 is a schematic view of another light guide mechanism of the present exemplary embodiments, and Figure 11 is a schematic view of another light guide mechanism of the present exemplary embodiments. In some exemplary embodiments, as shown in Figures 10 and 11, the light guide mechanism 4 can be a non-uniform thickness plate, and the thickness of the light guide mechanism 4 can be adjusted according to the location to achieve the purpose of thinning the display module on the basis of the thickness of the first light source. The light guide mechanism 4 can include a first light guide portion 18 and a second light guide portion 17, and the second light guide portion 17 can be a non-symmetrical horn shape or a wedge-shaped horn shape.

[0095] Figure 12 is a schematic diagram of another display module of the present exemplary embodiment. In some exemplary embodiments, as shown in Figure 12, the display module further comprises an anti-reflective film 20, the light guide 4 and the display panel 2 are spaced apart, and an air layer 9 is formed between the light guide 4 and the display panel 2. The display panel 2 comprises a polarizing layer 21 at one end close to the cover plate 1. The end surface of the light guide 4 close to the air layer 9 and the end surface of the display panel 2 close to the air layer 9 are provided with the anti-reflective film 20, which can reduce the reflection of light by the air layer 9. The anti-reflective film 20 occupies part of the space of the air layer 9, and the orthographic projection of the anti-reflective film 20 on the cover plate 1 overlaps the orthographic projection of the display panel 2 on the cover plate 1. The applicant has found that the air layer 9 between the light guide 4 and the display panel 2 in the related display module can cause an increase in reflectivity, and the display module of the present example can use the Anti-Reflection Coating (ARC) technology to increase the anti-reflective film 20 at the air interface (the surface of the light guide 4 facing the display panel 2, the surface of the polarizing layer 21 facing the light guide 4) to avoid the problem of increased reflectivity. The anti-reflective film 20 can be formed by pasting or evaporating / spraying anti-reflective materials. The provision of the anti-reflective film 20 can reduce the reflectivity of the two layers of about 4% each to a reflectivity of less than 1%.

[0096] Figure 13 is a schematic diagram of yet another display module of the present exemplary embodiment. In some exemplary embodiments, as shown in Figure 13, the display module further comprises a first optically transparent adhesive layer 22, which is located between the light guide 4 and the display panel 2, and the light guide 4 and the display panel 2 are bonded by the first optically transparent adhesive layer 22. In the present example, the first optically transparent adhesive layer 22 fills the gap between the light guide 4 and the display panel 2, making the product structure of the display module more stable and the image quality better. The first optically transparent adhesive layer 22 can be of the same material as the second optically transparent adhesive layer 10. The ratio of the refractive index of the light guide 4 to the first optically transparent adhesive layer 22 can be 1 to 1.5. In the present example, the refractive index of the first optically transparent adhesive layer 22 is low, the refractive index of the light guide 4 can be 1.5 to 1.7, the refractive index of the first optically transparent adhesive layer 22 can be 1 to 1.7, and in the present example, the refractive index of the first optically transparent adhesive layer 22 can be 1.2.

[0097] Fig. 14 is a partial schematic view of the light guide mechanism in Fig. 13, and Fig. 15 is a schematic view of the light guide mechanism in Fig. 13 and the first optically transparent adhesive layer. As shown in Figs. 13-15, the display module further includes a plurality of first films 23 attached to the light guide surface 14 of the light guide mechanism 4. The first films 23 correspond to the plurality of dot structures 11 one-to-one, and the orthographic projection of the dot structures 11 on the cover plate 1 is located within the orthographic projection of the first films 23 on the cover plate 1. The first films 23 are sandwiched between the light guide mechanism 4 and the first optically transparent adhesive layer 22. The first films 23 are circular, and the diameter of the first films 23 is D. In the present example, the value of D can be 50 microns. The first films 23 are formed by a PDMS (Polydimethylsiloxane) reverse molding process on the dot structures 11, which can avoid the problem of the dot structures 11 being unable to reflect light due to being attached to the first optically transparent adhesive layer 22. The arrangement of the first films 23 does not affect the attachment of the non-dot structure 11 region, and the full-attachment goal of the light guide mechanism 4 and the first optically transparent adhesive layer 22 is achieved, in which the dot structures 11 can normally emit light. The first films 23 can be obtained by a printing process. The light guide mechanism 4 with the first films 23 can be divided into a low-adhesion region 24 covering the first films 23 and a high-adhesion region 25 not covered by the first films 23. The dot structures 11 are located in the low-adhesion region 24. During the preparation of the first optically transparent adhesive layer 22, the first optically transparent adhesive layer 22 is in short-term contact with the dot structures 11. Due to the arrangement of the first films 23, the adhesion is reduced, and the first optically transparent adhesive layer 22 restores the state of no contact with the dot structures 11 by using its own elasticity, thereby avoiding the problem of the dot structures 11 being filled and unable to reflect light.

[0098] Fig. 16 is a schematic view of another display module of the present example embodiment, and Fig. 17 is a schematic view of the light guide mechanism in Fig. 16 and the protective layer. In some example embodiments, as shown in Figs. 16 and 17, the display module further includes a protective layer 26 located between the light guide mechanism 4 and the first optically transparent adhesive layer 22. The protective layer 26 is attached to the light guide mechanism 4, and the first optically transparent adhesive layer 22 is attached to the protective layer 26. The attachment between the light guide mechanism 4 and the display panel 2 is a “hard-to-hard” attachment, and a certain thickness of the first optically transparent adhesive layer 22 is needed to avoid attachment bubbles caused by warping. The step difference absorption capacity (deformation capacity) of the full-attachment first optically transparent adhesive layer 22 is generally between 1 / 5 and 1 / 3 of the thickness of the first optically transparent adhesive layer 22. The step difference absorption capacity fills the dot structures 11 of the light guide mechanism 4, resulting in the dot structures being unable to emit light. The attachment between the protective layer 26 and the light guide mechanism 4 is a “soft-to-hard” attachment. The protective layer 26 has better shape following properties, and the adhesive can be thinned. The arrangement of the protective layer 26 can avoid the dot structures 11 of the light guide mechanism 4 being filled by the full-attachment first optically transparent adhesive layer 22.

[0099] In some example embodiments, as shown in FIGS. 16 and 17, the protective layer 26 includes the adhesive 27 and the protective substrate 28 stacked in the first direction, and the adhesive 27 is located on the side of the protective substrate 28 close to the light guide mechanism 4. The extension length of the dot structure 11 in the first direction can be H3, the thickness of the adhesive 27 can be H4, and the thickness of the adhesive 27 can be the extension length of the adhesive 27 in the first direction, wherein the ratio of H3 and H4 can be 0.1 to 10.

[0100] In some example embodiments, as shown in FIGS. 16 and 17, the light guide mechanism 4 is provided as a hard light guide plate, and the thickness (H4) of the adhesive 27 can be 0.01 to 0.05 mm. In this example, the extension length H3 of the dot structure 11 in the first direction can be 10 microns, the thickness (H4) of the adhesive 27 can be 10 microns, the step absorption capacity is only 2 to 3 microns, and the thickness of the adhesive 27 invading the dot structure 11 is 2 to 3 microns, which cannot completely fill the space in the dot structure 11. The first optical transparent adhesive layer 22 with a thickness of 0.2 mm, the step absorption capacity of the first optical transparent adhesive layer 22 is generally above 30 microns, which can easily fill the space of the dot structure 11 with a height of 10 microns, resulting in that the dot structure 11 is filled, and the step absorption capacity of the adhesive 27 in this example is only 2 to 3 microns, which does not affect the reflection capacity of the dot structure 11.

[0101] In some example embodiments, as shown in FIGS. 16 and 17, the light guide mechanism 4 can be a soft light guide film, the thickness of the light guide mechanism 4 is thinner, and the thickness of the adhesive 27 can be 0.001 to 0.05 mm, so that the thickness of the adhesive 27 is further thinned, the requirement for the height of the dot structure 11 on the light guide film is reduced, the dot structure 11 can be designed to be smaller in size and lower in height, the visibility is further reduced, and the display screen of the product is more transparent.

[0102] Figure 18 is a schematic view of a bending state of another light guide mechanism according to the present exemplary embodiment, Figure 19 is a schematic view of a C-C cross section of Figure 18, Figure 20 is a schematic view of an unfolding state of the light guide mechanism of Figure 18, and Figure 21 is a schematic view of a first preparation of the light guide mechanism of Figure 18. In some exemplary embodiments, as shown in Figures 18 to 21, the light guide mechanism 4 can be a soft light guide film, and the thickness of the light guide mechanism 4 is thin. The thickness of the light guide film can be 50 microns to 200 microns. The thickness of the light guide film is small, and the size of the first light source 3 matched with the light guide mechanism 4 is too small to be processed. The difficulty is reflected in the dispersion of the fluorescent glue, the high precision of die bonding and soldering. In some examples, the light guide film can be processed by striping, folding and superimposing to avoid the necessity of using small size LEDs, and is suitable for more easily processed and used LEDs. In the present example, the light guide mechanism 4 uses a laminated light guide film substrate (not shown in the figure) and a resin layer (not shown in the figure). The material of the light guide film substrate (not shown in the figure) can be PC material and the thickness can be 50 microns. The material of the resin layer (not shown in the figure) can be acrylic resin, and the thickness of the resin layer (not shown in the figure) can be 10 microns. In the preparation process of the light guide mechanism 4, the acrylic resin with a thickness of 10 microns is coated on the light guide film substrate (not shown in the figure), and then the dot structure 11 with a height of 5 microns is engraved on the copper roll mold, and then transferred to the resin layer (not shown in the figure) by the method of resin imprinting. After imprinting, the resin layer (not shown in the figure) is cured to form the dot structure 11 with a height of 5 microns.

[0103] In some example embodiments, as shown in FIGS. 18-21, the light guide mechanism 4 can include a flat plate segment 29 and a plurality of bent segments 30, one end of the plurality of bent segments 30 being connected to one end of the flat plate segment 29 in the second direction and arranged in sequence along the third direction, the flat plate segment 29 and the bent segments 30 having a same thickness H5, the flat plate segment 29 and the bent segments 30 can be cut from one piece of light guide film, and the value of H5 can be 60 microns. The flat plate segment 29 has a display area 31, and the dot structures 11 are arranged in the display area 31 of the flat plate segment 29. Before assembly, the light guide mechanism 4 needs to be prepared in a bent state, in which one end of the plurality of bent segments 30 is connected to one end of the flat plate segment 29 in the second direction and arranged in sequence along the third direction, the other end of the plurality of bent segments 30 is bent toward the third direction and extends to the first light source 3, the plurality of bent segments 30 are in the shape of “L”, the ends of the plurality of bent segments 30 close to the first light source 3 are arranged in a stack in the first direction, and the ends of the plurality of bent segments 30 close to the first light source 3 constitute the light inlet of the bent segments 30. The plurality of bent segments 30 include a first bent segment 30-1, a second bent segment 30-2, …, and an Nth bent segment 30-n, where n is a natural number greater than 1. At the end close to the first light source 3, the plurality of bent segments 30 are arranged in sequence in a stack in the order of the first bent segment 30-1, the second bent segment 30-2, …, and the Nth bent segment 30-n, so that the thickness of the light guide mechanism 4 at this location is the sum of the thicknesses of the plurality of bent segments 30, i.e., equal to 60 x n microns. In this example, the number of bent segments 30 is 30, i.e., n = 30, the total thickness (H) of the ends of the plurality of bent segments 30 close to the first light source 3 is 1800 microns, and the thickness (L) of the first light source 3 is 1500 microns, so that the light guide mechanism 4 can match the first light source 3 with a thickness of 1.5 millimeters.

[0104] In some example embodiments, as shown in FIGS. 18-21, before the bending state is completed, the light guide mechanism 4 needs to be prepared into an unfolded state. A light guide film is cut to form a flat plate segment 29 and a plurality of second directionally extending bending segments 30. The plurality of bending segments 30 are arranged in sequence in the third direction, i.e., in the order of first bending segment 30-1, second bending segment 30-2, …, and Nth bending segment 30-n. The length of the bending segment 30 is the dimension of the bending segment 30 in the second direction. The lengths of the plurality of bending segments 30 are different from each other, and the lengths of the plurality of bending segments 30 increase in sequence in the third direction. For example, the length (S2) of the second bending segment 30-2 is greater than the length (SI) of the first bending segment 30-1. The length (SI) of the first bending segment 30-1 is the shortest, and the length of the Nth bending segment 30-n is the longest, so that the plurality of bending segments 30 form a stepped shape at the end away from the flat plate segment 29. The light guide mechanism 4 is made of a flexible material and can be bent. The plurality of bending segments 30 need to be folded according to the bending line 32 (i.e., folded along the bending line 32) to form the bending state of the light guide mechanism 4. The angle between the bending line 32 and the second direction is 45°, so that the plurality of bending segments 30 are folded to the side in the third direction after being folded according to the bending line 32, and the bending lines 32 of the plurality of bending segments 30 correspond in the second direction. During the bending, the first bending segment 30-1 with the shortest length can be bent first. As shown in FIG. 20, the first bending segment 30-1 is bent into an “L” shape, so that one end of the first bending segment 30-1 is close to the first light source 3. Then, the remaining bending segments 30 are bent, and finally, the Nth bending segment 30-n is bent. The plurality of bending segments 30 are stacked together in the first direction and flush in the third direction at the end close to the first light source 3. The light inlets of the plurality of bending segments 30 are gathered together, and the thickness of the plurality of bending segments 30 after being stacked is slightly greater than the thickness (L) of the first light source 3, which is conducive to improving the utilization efficiency of the first light source 3. In addition, a bending tool can be used during the bending process of the bending line 32 to assist in positioning and bending of the plurality of bending segments 30.

[0105] Figure 22 is a schematic diagram of another display module of the present exemplary embodiment. In some exemplary embodiments, the photoelectric conversion efficiency of the first light source 3 is lower than that of the light source of visible light. In order to ensure that sufficient and effective infrared light is emitted from the display module, the heat generated by the first light source 3 can be dissipated through the heat dissipation assembly 35 to reduce the temperature of the first light source 3 and ensure that the first light source 3 works efficiently at an appropriate temperature. The display module includes a heat dissipation assembly 35, which can be connected to the back plate 5, and the first light source 3 is mounted on the heat dissipation assembly 35. The cover plate 1 can cover the heat dissipation assembly 35, i.e. the orthographic projection of the heat dissipation assembly 35 on the first plane can be located within the orthographic projection of the cover plate 1 on the first plane. The back plate 5 can be made of aluminum plate or stainless steel plate, and the heat dissipation assembly 35 can be integrally formed with the back plate 5 by bending, stamping and other processes of a piece of metal plate. The back plate 5 includes a bottom plate 33 and a ring-shaped side plate 34, the bottom plate 33 is parallel to the cover plate 1, and the side plate 34 is perpendicular to the bottom plate 33 and connected to the bottom plate 33 at one end in the first direction, the bottom plate 33 and the side plate 34 form the mounting groove 12, and the end of the side plate 34 away from the bottom plate 33 forms the slot of the mounting groove 12. The heat dissipation assembly 35 can be plate-shaped, one end of the heat dissipation assembly 35 is connected to the end of the side plate 34 away from the bottom plate 33, the other end of the heat dissipation assembly 35 extends away from the mounting groove 12, and the heat dissipation assembly 35 is perpendicular to the side plate 34. The pads (not shown in the figure) of the first light source 3 are located on the side of the first light source 3 away from the cover plate 1, and the pads (not shown in the figure) of the first light source 3 are mounted on the heat dissipation assembly 35, and the light emitting surface of the first light source 3 is the side surface of the first light source 3, i.e. the end surface facing the light guide assembly 4. In order to further improve the heat dissipation efficiency, a heat-conducting adhesive tape can be used to fix the first light source 3 and the heat dissipation assembly 35. However, the heat dissipation assembly 35 and the back plate 5 are not limited to be an integral part, for example, the heat dissipation assembly 35 and the back plate 5 can be connected through a detachable structure such as a buckle or a bolt, and heat dissipation can also be achieved. In some exemplary embodiments, the heat dissipation assembly 35 is provided with a heat dissipation structure on the side away from the first light source 3, and the heat dissipation structure can be a device made of a material with high heat conductivity such as a graphite sheet or a graphene film.

[0106] Figure 23 is a schematic view of another display module of the present exemplary embodiment. In some exemplary embodiments, as shown in Figure 23, the photoelectric conversion efficiency of the first light source 3 is lower than that of the light source of visible light. In order to ensure sufficient and effective infrared light to be emitted from the display module, the heat generated by the first light source 3 can be dissipated through the heat dissipation assembly 35 to reduce the temperature of the first light source 3 and ensure the high efficiency of the first light source 3 at an appropriate temperature. The display module includes the heat dissipation assembly 35, which can be connected with the back plate 5, and the first light source 3 is mounted on the heat dissipation assembly 35. The cover plate 1 can cover the heat dissipation assembly 35, i.e. the orthographic projection of the heat dissipation assembly 35 on the first plane can be located within the orthographic projection of the cover plate 1 on the first plane. The back plate 5 can be made of aluminum plate or stainless steel plate, and the heat dissipation assembly 35 can be integrally formed with the back plate 5 through bending, stamping and other processes of a metal plate. The back plate 5 includes a bottom plate 33 and a ring-shaped side plate 34, the bottom plate 33 is parallel to the cover plate 1, and the side plate 34 is perpendicular to the bottom plate 33 and connected with the bottom plate 33 at one end in the first direction, the bottom plate 33 and the side plate 34 enclose the mounting groove 12, and the end of the side plate 34 away from the bottom plate 33 encloses the slot of the mounting groove 12. The heat dissipation assembly 35 can be a right-angle type, one end of the heat dissipation assembly 35 is connected with the end of the side plate 34 away from the bottom plate 33, and the other end of the heat dissipation assembly 35 extends away from the mounting groove 12 and bends towards one side of the cover plate 1. The solder pad (not shown in the figure) of the first light source 3 is located on the side of the first light source 3, i.e. the side of the first light source 3 away from the light guide assembly 4, the solder pad (not shown in the figure) of the first light source 3 is mounted on the heat dissipation assembly 35, and the light emitting surface of the first light source 3 is the side of the surface of the first light source 3 opposite to the solder pad (not shown in the figure), i.e. the end surface facing the light guide assembly 4. In order to further improve the heat dissipation efficiency, the heat-conducting adhesive tape can be used to fix the first light source 3 and the heat dissipation assembly 35. In some exemplary embodiments, a display device can include a housing and the above-mentioned display module, and the display module is mounted on the housing. In some exemplary embodiments, the display device is a product with image display function, such as a display, a television, a billboard, a digital photo frame, a telephone, a mobile phone, a digital camera, a camcorder, a navigator, a household appliance or a device with display function. The present application does not specially limit the specific form of the above-mentioned display device.

[0107] The above-mentioned embodiments, the display module of the present example, can emit infrared light to promote the health of users without affecting image display, which has a positive impact on users.

[0108] Although the embodiments of the present application have been shown and described above, it should be understood that the above-mentioned embodiments are exemplary and cannot be understood as limiting the present application, and those skilled in the art can make changes, modifications, replacements and variations to the above-mentioned embodiments within the scope of the present application.

Claims

1. A display module, wherein, The display panel, the cover plate, the first light source and the light guide mechanism are provided in sequence in a first direction, the light guide mechanism is located on the light exit side of the display panel, the first light source is located on at least one side of the light guide mechanism in a second direction, the first direction is perpendicular to the cover plate, and the second direction is parallel to the cover plate. The first light source is arranged to emit infrared light, and the light guide mechanism is configured to guide the light emitted by the first light source towards the cover plate. The first light source is arranged to emit infrared light, and the light guide mechanism is configured to guide the light emitted by the first light source towards the cover plate. 2.The display module of claim 1, wherein, The first light source is arranged to emit infrared light, and the light guide mechanism is configured to guide the light emitted by the first light source towards the cover plate. The first light source is arranged to emit infrared light, and the light guide mechanism is configured to guide the light emitted by the first light source towards the cover plate.

3. The display module of claim 2, wherein, The first light source is arranged to emit infrared light, and the light guide mechanism is configured to guide the light emitted by the first light source towards the cover plate. The first light source is arranged to emit infrared light, and the light guide mechanism is configured to guide the light emitted by the first light source towards the cover plate.

4. The display module of claim 1, wherein, The first light source is arranged to emit infrared light, and the light guide mechanism is configured to guide the light emitted by the first light source towards the cover plate.

5. The display module of claim 4, wherein, The first light source is arranged to emit infrared light, and the light guide mechanism is configured to guide the light emitted by the first light source towards the cover plate.

6. The display module of claim 5, wherein, The first light source is arranged to emit infrared light, and the light guide mechanism is configured to guide the light emitted by the first light source towards the cover plate. The first light source is arranged to emit infrared light, and the light guide mechanism is configured to guide the light emitted by the first light source towards the cover plate. The first light source is arranged to emit infrared light, and the light guide mechanism is configured to guide the light emitted by the first light source towards the cover plate.

7. The display module of claim 6, wherein, The first light source is arranged to emit infrared light, and the light guide mechanism is configured to guide the light emitted by the first light source towards the cover plate.

8. The display module of claim 4, wherein, The first light source is arranged to emit infrared light, and the light guide mechanism is configured to guide the light emitted by the first light source towards the cover plate.

9. The display module of claim 4, wherein, The first light source is arranged to emit infrared light, and the light guide mechanism is configured to guide the light emitted by the first light source towards the cover plate. The first light source is arranged to emit infrared light, and the light guide mechanism is configured to guide the light emitted by the first light source towards the cover plate. The first light source is arranged to emit infrared light, and the light guide mechanism is configured to guide the light emitted by the first light source towards the cover plate.

10. The display module of claim 1, wherein, The first light source is arranged to emit infrared light, and the light guide mechanism is configured to guide the light emitted by the first light source towards the cover plate. The first light source is arranged to emit infrared light, and the light guide mechanism is configured to guide the light emitted by the first light source towards the cover plate. The first light source is arranged to emit infrared light, and the light guide mechanism is configured to guide the light emitted by the first light source towards the cover plate. The first light source is arranged to emit infrared light, and the light guide mechanism is configured to guide the light emitted by the first light source towards the cover plate. The first light source is arranged to emit infrared light, and the light guide mechanism is configured to guide the light emitted by the first light source towards the cover plate. The first light source is arranged to emit infrared light, and the light guide mechanism is configured to guide the light emitted by the first light source towards the cover plate. The first light source is arranged to emit infrared light, and the light guide mechanism is configured to guide the light emitted by the first light source towards the cover plate. The first light source is arranged to emit infrared light, and the light guide mechanism is configured to guide the light emitted by the first light source towards the cover plate. The first light source is arranged to emit infrared light, and the light guide mechanism is configured to guide the light emitted by the first light source towards the cover plate. The first light source is arranged to emit infrared light, and the light guide mechanism is configured to guide the light emitted by the first light source towards the cover plate. 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The first light source is arranged to emit infrared light, and the light guide mechanism is configured to guide the light emitted by the first light source towards the cover plate. The first light source is arranged to emit infrared light, and the light guide mechanism is configured to guide the light emitted by the first light source towards the cover plate. The first light source is arranged to emit infrared light, and the light guide mechanism is configured to guide the light emitted by the first light source towards the cover plate. The first light source is arranged to emit infrared light, and the light guide mechanism is configured to guide the light emitted by the first light source towards the cover plate. The first light source is arranged to emit infrared light, and the light guide mechanism is configured to guide the light emitted by the first light source towards the cover plate. The first light source is arranged to emit infrared light, and the light guide mechanism is configured to guide the light emitted by the first light source towards the cover plate. The first light source is arranged to emit infrared light, and the light guide mechanism is configured to guide the light emitted by the first light source towards the cover plate. The first light source is arranged to emit infrared light, and the light guide mechanism is configured to guide the light emitted by the first light source towards the cover plate. The first light source is arranged to emit infrared light, and the light guide mechanism is configured to guide the light emitted by the first light source towards the cover plate. The first light source is arranged to emit infrared light, and the light guide mechanism is configured to guide the light emitted by the first light source towards the cover plate. The first light source is arranged to emit infrared light, and the light guide mechanism is configured to guide the light emitted by the first light source towards the cover plate. The first light source is arranged to emit infrared light, and the light guide mechanism is configured to guide the light emitted by the first light source towards the cover plate. The first light source is arranged to emit infrared light, and the light guide mechanism is configured to guide the light emitted by the first light source towards the cover plate. The first light source is arranged to emit infrared light, and the light guide mechanism is configured to guide the light emitted by the first light source towards the cover plate. The first light source is arranged to emit infrared light, and the light guide mechanism is configured to guide the light emitted by the first light source towards the cover plate. The first light source is arranged to emit infrared light, and the light guide mechanism is configured to guide the light emitted by the first light source towards the cover plate. The first light source is arranged to emit infrared light, and the light guide mechanism is configured to guide the light emitted by the first light source towards the cover plate. The first light source is arranged to emit infrared light, and the light guide mechanism is configured to guide the light emitted by the first light source towards the cover plate. The first light source is arranged to emit infrared light, and the light guide mechanism is configured to guide the light emitted by the first light source towards the cover plate. The first light source is arranged to emit infrared light, and the light guide mechanism is configured to guide the light emitted by the first light source towards the cover plate. The first light source is arranged to emit infrared light, and the light guide mechanism is configured to guide the light emitted by the first light source towards the cover plate. The first light source is arranged to emit infrared light, and the light guide mechanism is configured to guide the light emitted by the first light source towards the cover plate. The first light source is arranged to emit infrared light, and the light guide mechanism is configured to guide the light emitted by the first light source towards the cover plate. The first light source is arranged to emit infrared light, and the light guide mechanism is configured to guide the light emitted by the first light source towards the cover plate. The first light source is arranged to emit infrared light, and the light guide mechanism is configured to guide the light emitted by the first light source towards the cover plate. The first light source is arranged to emit infrared light, and the light guide mechanism is configured to guide the light emitted by the first light source towards the cover plate. The first light source is arranged to emit infrared light, and the light guide mechanism is configured to guide the light emitted by the first light source towards the cover plate. The first light source is arranged to emit infrared light, and the light guide mechanism is configured to guide the light emitted by the first light source towards the cover plate. The first light source is arranged to emit infrared light, and the light guide mechanism is The light guide mechanism is provided with a layer of the anti-reflection film close to the end face of the air layer, and the display panel is provided with another layer of the anti-reflection film close to the end face of the air layer, and the anti-reflection film is configured to reduce the reflection of the air layer to light.

11. The display module of claim 4, wherein, The display module further comprises a first optically transparent adhesive layer between the light guide mechanism and the display panel, and the light guide mechanism and the display panel are bonded by the first optically transparent adhesive layer.

12. The display module of claim 11, wherein, The ratio of the refractive index of the light guide mechanism to the refractive index of the first optically transparent adhesive layer is 1 to 1.

5.

13. The display module of claim 12, wherein, The refractive index of the light guide mechanism is 1.5 to 1.7, and the refractive index of the first optically transparent adhesive layer is 1.

2.

14. The display module of claim 11, wherein, The display module further comprises a plurality of first films on the end face of the light guide mechanism close to the display panel, and the orthographic projection of one dot structure on the cover plate is located in the orthographic projection of one first film on the cover plate.

15. The display module of claim 11, wherein, The display module further comprises a protective layer between the light guide mechanism and the first optically transparent adhesive layer.

16. The display module of claim 15, wherein, The protective layer comprises a protective substrate and a bonding adhesive stacked in the first direction, and the bonding adhesive is located on the side of the protective substrate close to the light guide mechanism. The ratio of the extension length of the dot structure in the first direction to the extension length of the bonding adhesive in the first direction is 0.1 to 10.

17. The display module of claim 16, wherein, The light guide mechanism is a hard light guide plate, and the extension length of the bonding adhesive in the first direction is 0.01 to 0.05 mm.

18. The display module of claim 16, wherein, The light guide mechanism is a soft light guide film, and the extension length of the bonding adhesive in the first direction is 0.001 to 0.05 mm.

19. The display module of claim 18, wherein, The light guide mechanism comprises a flat plate segment and a plurality of bending segments, the orthographic projection of the flat plate segment on the cover plate overlaps the orthographic projection of the display panel on the cover plate, and a plurality of dot structures are arranged on the flat plate segment. One end of each of the plurality of bending segments is connected to one end of the flat plate segment in the second direction and arranged in a third direction in sequence, the third direction is perpendicular to the second direction and parallel to the cover plate. The other end of each of the plurality of bending segments is bent towards the first light source and stacked in the first direction.

20. The display module of claim 3, wherein, The heat dissipation assembly and the back plate are configured as an integral piece.

21. A display device, wherein, The display module comprises a housing and a display module as claimed in any one of claims 1 to 20, and the display module is mounted on the housing.

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