Display module and display device

Abstract

The invention discloses a display module and a display device. The display module comprises a display panel, a cover plate, a first light source and a light guide mechanism, the cover plate, the light guide mechanism and the display panel are sequentially arranged in the 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 the 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 light emitted by the first light source to the cover plate. According to the display module and the display device disclosed by the invention, on the basis of normal display, the infrared light capable of promoting the health of a user can be emitted.

Description

TECHNICAL FIELD

[0001] 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

[0002] 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 is an optimization to reduce the harm caused by the "eye injury" problem 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

[0003] 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.

[0004] The technical problem to be solved by the present disclosure is to provide a display module and a display device, by adding an infrared emission structure between the display panel and the cover plate, so that the display module can emit infrared light to promote user health on the basis of normal display.

[0005] At least one embodiment of the present disclosure provides a display module, comprising 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 arranged to emit infrared light, and the light guide mechanism is configured to guide the light emitted by the first light source to 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 assembly are further included, the display panel is mounted on the back plate, the heat dissipation assembly is arranged at the edge of the back plate, and the first light source is mounted on the heat dissipation assembly.

[0011] A normal projection of the heat dissipation component on the first plane is located within a normal 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 configured to convert the first light source into a surface light source.

[0013] In some example embodiments, a density of the dot structures is configured 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 configured 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 configured to be dot-shaped dot structures.

[0016] Alternatively, the dot structures are configured to be groove-shaped dot structures, the groove-shaped dot structures extend along a third direction, and a plurality of the groove-shaped dot structures are arranged at intervals in the second direction, the third direction being perpendicular to the second direction and parallel to the cover plate.

[0017] In some example embodiments, a side of the light guide mechanism close to the display panel is configured to be a light guide surface, an angle between a side of the dot structures close to the first light source and the light guide surface is a light incidence angle, and the light incidence angle is configured to be 30° to 60°.

[0018] In some example embodiments, the light guide mechanism is configured to be a plate material parallel to the cover plate and having a uniform thickness.

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

[0020] A normal projection of the first light guide portion on the first plane does not overlap a normal projection of the display panel on the first plane, a thickness of the first light guide portion is configured to gradually decrease from a side close to the first light guide portion to a side close to the first light source, and the first plane is parallel to the cover plate.

[0021] A thickness of the second light guide portion is less than a thickness of the first light guide portion, a normal projection of the second light guide portion on the first plane overlaps a normal projection of the display panel on the first plane, and a plurality of the dot structures are arranged on the second light guide portion.

[0022] In some example embodiments, two layers of anti-reflective films are further included,

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

[0025] In some example embodiments, a first optically transparent adhesive layer is further included 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 the refractive index of the light guide mechanism to the refractive index of 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, a plurality of first films are further included on an end surface of the light guide mechanism close to the display panel, and a normal projection of one of the dot structures on the cover plate is located within a normal projection of one of the first films on the cover plate.

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

[0030] In some example embodiments, the protective layer includes 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 configured as a soft light guide film, and the extension length of the bonding adhesive in the first direction is set to 0.001 to 0.05 mm.

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

[0035] One end of each of the plurality of bent segments is connected to one end of the flat segment in the second direction and arranged in a third direction in sequence, the third direction being 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 assembly is arranged as an integral piece with the back plate.

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

[0039] Other features and advantages of the present application will be set forth in the following description, and in part will become apparent from the description, or can be learned by practice of the present application. Other advantages of the present application will be realized and attained by the methods and solutions particularly pointed out in the written description and claims hereof. BRIEF DESCRIPTION OF DRAWINGS

[0040] The accompanying drawings are included to provide an understanding of the present application, and constitute a part of the specification, together with the embodiments of the present application, to explain the technical solutions of the present application, and do not constitute a limitation on the technical solutions of the present application.

[0041] Figure 1 A display module schematic diagram of the present example embodiment;

[0042] Figure 2 A spectrum diagram of the display module in Figure 1

[0043] Figure 3 A light guide mechanism schematic diagram of the present example embodiment;

[0044] Figure 4 A cross-sectional schematic diagram of A-A in Figure 3

[0045] Figure 5 Another light guide mechanism schematic diagram of the present example embodiment;

[0046] Figure 6 A cross-sectional schematic diagram of B-B in Figure 5

[0047] Figure 7 ​​​This is a schematic diagram illustrating the usage state of another display module in this exemplary embodiment;

[0048] Figure 8 This is a schematic diagram of yet another light guide mechanism according to this exemplary embodiment;

[0049] Figure 9 A schematic diagram of yet another display module according to this exemplary embodiment;

[0050] Figure 10 This is a schematic diagram of another light guide mechanism according to this exemplary embodiment;

[0051] Figure 11 This is a schematic diagram of yet another light guide mechanism according to this exemplary embodiment;

[0052] Figure 12 A schematic diagram of another display module for this exemplary embodiment;

[0053] Figure 13 A schematic diagram of yet another display module according to this exemplary embodiment;

[0054] Figure 14 for Figure 13 A partial schematic diagram of the light guide mechanism in the image;

[0055] Figure 15 for Figure 13 A schematic diagram showing the bonding between the light guiding mechanism and the first optically transparent adhesive layer.

[0056] Figure 16 A schematic diagram of another display module for this exemplary embodiment;

[0057] Figure 17 for Figure 16 A schematic diagram showing the bonding between the light guide mechanism and the protective layer.

[0058] Figure 18 This is a schematic diagram of the bending state of another light guide mechanism in this exemplary embodiment;

[0059] Figure 19 for Figure 18 Schematic diagram of the CC-direction section in the middle;

[0060] Figure 20 for Figure 18 A schematic diagram of the unfolded state of the light guide mechanism in the image;

[0061] Figure 21 for Figure 18 First schematic diagram of the fabrication of the light guide mechanism in the image;

[0062] Figure 22 A schematic diagram of yet another display module according to this exemplary embodiment;

[0063] Figure 23 FIG. 3 is a schematic view of another display module according to an exemplary embodiment of the present disclosure.

[0064] Reference signs:

[0065] 1 - cover plate; 2 - display panel; 3 - first light source;

[0066] 4 - light guide mechanism; 5 - back plate; 6 - backlight assembly;

[0067] 7 - second light source; 8 - backlight guide mechanism; 9 - air layer;

[0068] 10 - second optical transparent adhesive layer; 11 - dot structure; 12 - mounting groove;

[0069] 13 - light exit surface; 14 - light guide surface; 15 - display module;

[0070] 16 - user; 17 - second light guide part; 18 - first light guide part;

[0071] 19 - third light guide part; 20 - anti-reflection film; 21 - polarizing layer;

[0072] 22 - first optical transparent adhesive layer; 23 - first film; 24 - low adhesion area;

[0073] 25 - high adhesion area; 26 - protective layer; 27 - bonding adhesive;

[0074] 28 - protective substrate; 29 - flat section; 30 - bending section;

[0075] 31 - display area; 32 - bending line; 33 - bottom plate;

[0076] 34 - side plate; 35 - heat dissipation assembly; 36 - light exit side. DETAILED DESCRIPTION

[0077] 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 that the manners and contents 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 contents 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.

[0078] 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.

[0079] The ordinal numbers "first", "second", "third" and the like in this specification are used to avoid confusion among components, and are not intended to be limiting in terms of numbers.

[0080] In this specification, in order to facilitate the description and simplify the description, the 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.

[0081] In this specification, unless explicitly defined and limited otherwise, the terms "mount", "connected", "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.

[0082] 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.

[0083] 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.

[0084] 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.

[0085] 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.

[0086] 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".

[0087] 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.

[0088] 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.

[0089] 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.

[0090] With the proliferation of hardware, software, and content in electronic products, users are spending increasingly more time on screens and less time outdoors. This social phenomenon has led to a year-on-year increase in the incidence of eye diseases such as myopia, visual impairment, and strabismus, all negatively impacted by the light emitted from display screens. Infrared light, also known as infrared radiation, falls outside the red light spectrum and has wavelengths ranging from 0.77 μm to 1000 μm. It belongs to the electromagnetic spectrum and is a type of electromagnetic wave with strong thermal effects. Infrared light has a shorter wavelength than radio waves but longer than visible light, and is invisible to the naked eye. The wavelength range of infrared light is very wide, and it is divided into near-infrared, mid-infrared, and far-infrared regions, with corresponding electromagnetic waves called near-infrared, mid-infrared, and far-infrared light. For example, in the medical field, infrared light is often classified as follows: near-infrared light (0.76–3 micrometers), mid-infrared light (3–30 micrometers), and far-infrared light (30–1000 micrometers). The applicant discovered that far-infrared light has been applied in the medical field. Far-infrared light has the ability to stimulate the resonance of water molecules in cells, activate mitochondria, promote blood circulation, and activate cell function. It has unparalleled advantages in the health field compared to other wavelengths of light. Far-infrared therapy devices and far-infrared therapy patches have also been launched on the market.

[0091] Figure 1 This is a schematic diagram of a display module according to an exemplary embodiment of the present invention. This disclosure provides a display module, such as... Figure 1 As shown, the display module may 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 may be arranged sequentially in a first direction. The light guide mechanism 4 may be located on the light-emitting side 36 of the display panel 2, which is the side of the display panel 2 that emits light. The first light source 3 may be located on at least one side of the light guide mechanism 4 in a second direction. The first direction may be perpendicular to the cover plate 1, and the second direction may be parallel to the cover plate 1. The first light source 3 emits infrared light, and 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, having a positive impact on the user.

[0092] In some exemplary embodiments, such as Figure 1 As shown, the display module also includes a backplate 5 and a backlight assembly 6. The backplate 5 can form a mounting groove 12, and the backlight assembly 6 and the display panel 2 can be located within the mounting groove 12. The cover plate 1 and the light guide mechanism 4 are both located on the side of the display panel 2 away from the backlight assembly 6 and outside the mounting groove 12. The backlight assembly 6 includes a second light source 7 and a backlight guiding mechanism 8. The second light source 7 can emit display light, and the backlight guiding 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 from the cover plate 1.

[0093] In some example embodiments, as shown in Figure 1 A second optical 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 optical transparent adhesive layer 10. The cover plate 1 can be made of glass, and the second optical transparent adhesive layer 10 can be made of optical transparent adhesive. Both the cover plate 1 and the second optical transparent adhesive layer 10 can transmit light.

[0094] In some example embodiments, as shown in Figure 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 optical 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, and the light emitted by the first light source 3 is infrared light and irradiates the cover plate 1 through the light guide mechanism 4. As shown by the dashed arrows, the infrared light passes through the second optical 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 change 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.

[0095] Figure 2 For the spectrum of the display module in Figure 1 In some example embodiments, as shown in Figure 2 , Figure 2 The abscissa in is wavelength, and the ordinate is light intensity. The dashed line is the spectrum of the display light, and the solid line is the spectrum of the infrared light. It can be seen that 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.

[0096] Figure 3 is a schematic diagram of a light guide mechanism of the present example embodiment, Figure 4 is a schematic diagram of the A-A cross section in Figure 3 In some example embodiments, as shown in Figure 1 , Figure 3 and Figure 4As shown, the light guide 4 can be a flat plate, and the material of the light guide 4 can be a high polymer material with high transparency, such as Polymethyl Methacrylate (PMMA) or Polycarbonate (PC), and 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 is parallel to the cover plate 1, and the light guide 4 is an equal-thickness plate, i.e., the thickness (H) of the light guide 4 is uniform at all positions, and the thickness (H) of the light guide 4 is the size in the first direction. The thickness (H) of the light guide 4 can be slightly greater than the thickness (L) of the first light source 3, for example, the value of H can be 1.3 mm or 1.6 mm, and generally the thickness (L) of the first light source 3 can be 1.2 mm or 1.5 mm. The first light source 3 with a thickness (L) of 1.2 mm is a commonly used specification, and the first light source 3 with a smaller thickness (L) is less commonly used.

[0097] In some example embodiments, as shown in Figure 1 and Figure 3 The end surface of the light guide 4 facing the first light source 3 is the light-incident surface of the light guide 4, and the end surface of the light guide 4 away from the display panel 2 can be the light-outgoing surface 13, and the end surface of the light guide 4 close to the display panel 2 can be the light-guiding surface 14, and a plurality of dot structures 11 can be arranged on the light-guiding surface 14. The light of the first light source 3 enters the light guide 4 through the light-incident surface of the light guide 4, and when the light reaches each dot structure 11, the light is reflected, and the reflected light is diffused in various directions, and then repeatedly reflected between the light-outgoing surface 13 and the light-guiding surface 14 until the reflection condition of the light-outgoing surface 11 is broken and the light is emitted from the light-outgoing surface 11.

[0098] In some example embodiments, as shown in Figure 1 and Figure 3As shown, 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 realized by adjusting the dot density. In the present 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 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 of 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 of the first area (A1) to the second area (A2) can be 3 to 5, and the ratio of the density of the dot structure 11 of the second area (A2) to 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 the present 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%.

[0099] In some example embodiments, as Figure 3 and Figure 4As shown, the dot structure 11 can be a dotted network of dots, which are non-uniformly arranged on the light guide surface 14 to form a two-dimensional distribution. The dot structure 11 can be formed by a recess in the light guide surface 14, and the dot structure 11 can be a conical groove. The diameter of the circle formed by the dot structure 11 on the light guide surface 14 is 20 micrometers to 50 micrometers. The density of the dot structure 11 gradually increases in the second direction from the side closer to the first light source 3 to the side farther away from the first light source 3, and the density of the dot structure 11 remains basically consistent in the third direction. In this example, the viewing angle of the display module is 0°, that is, the user's face is directly facing the display module. The angle formed between the end face of the dot structure 11 near the first light source 3 and the light guide surface 14 is the light-attracting angle α, where the light-attracting angle α = 45°. The height of the dot structure 11 is the dimension of the dot structure 11 in the first direction. The greater the height of the dot structure 11, the stronger the light emission capability. However, it should be noted that the greater the height of the dot structure 11, the greater the visibility of the dot structure 11. That is, under normal display conditions, the dots are blurry and visible. Therefore, it is necessary to minimize the height and size of the dot structure 11 to reduce the risk of the dot structure 11 being visible.

[0100] Figure 5 This is a schematic diagram of another light guide mechanism in this exemplary embodiment. Figure 6 for Figure 5 The schematic diagram of the BB-direction section in some exemplary embodiments, such as Figure 5 As shown, the dot structure 11 can be a grooved dot structure, with the grooved dots non-uniformly arranged on the light guide surface 14 to form a one-dimensional distribution. The dot structure 11 can also be formed by a recess in the light guide surface 14, or it can be an elongated groove. The dot structure 11 extends along a third direction, and multiple dot structures 11 are spaced apart in a second direction. The cross-section of the groove formed by the dot structures 11 can be triangular, and the grooves formed by multiple dot structures 11 are parallel to each other and flush at both ends in the first direction. On the side closer to the first light source 3, the distance between two adjacent dot structures 11 is larger, and on the side farther from the first light source 3, the distance between two adjacent dot structures 11 is smaller. The density of the dot structures 11 gradually increases in the second direction from the side closer to the first light source 3 to the side farther from the first light source 3, and the density of the dot structures 11 remains consistent in the third direction. In some exemplary embodiments, the viewing angle of the display module is 0°, that is, the user's face is directly facing the display module, and the angle formed by the end face of the dot structure 11 near the first light source 3 and the light guide surface 14 is the light-facing angle, which can be 30° to 60°. In this example, the light-facing angle is equal to 45°.

[0101] Figure 7For another use state diagram of the display module of the present exemplary embodiment, in some exemplary embodiments, the viewing angle of the display module 15 is β, the viewing angle of the display module 15 can be the angle between the line connecting the user 16 and the center of the display module 14 and the straight line perpendicular to the display module 15, the value of β is not 0, the user 16 does not directly face the display module 15, but views the display module 15 at an angle, and 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 consider the refractive index of the light guide mechanism and the product use angle (viewing angle) in the use scenario.

[0102] In some exemplary embodiments, as shown in Figure 1 and Figure 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.

[0103] Figure 8 For another light guide mechanism diagram of the present exemplary embodiment, Figure 9 For another display module diagram of the present exemplary embodiment, in some exemplary embodiments, as shown in Figure 8 and Figure 9As shown, the light guide mechanism 4 can be a non-equal-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 part 18 and a second light guide part 17, one end of the first light guide part 18 in the second direction is connected to the second light guide part 17, and the other end is close to the first light source 3, and the thickness of the second light guide part 17 is less than the thickness of the first light guide part 18. The second light guide part 17 can be an equal-thickness planar plate, and a plurality of dot structures 11 can be located on the second light guide part 17, and the thickness of the second light guide part 17 can be H1, and the value of H1 can be 0.4mm to 0.8mm. The thickness of the first light guide part 18 gradually decreases from the end close to the first light source 3 to the end close to the first light guide part 18, so that the cross section of the first light guide part 18 can be a symmetrical horn shape. The thickness of the first light guide part 18 at the end away from the first light source 3 can be H2, wherein H2>H1, 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 part 19, which is located at the end of the first light guide part 18 away from the second light guide part 17, and the third light guide part 19 can be an equal-thickness plate, and the thickness of the third light guide part 19 can be H3, and the value of H3 is equal to the thickness of the first light guide part 18 at the end close to the first light source 3 (H2).

[0104] As shown in some example embodiments, Figure 8 and Figure 9 As shown, the second light guide part 17 is parallel to the cover plate 1, the second light guide part 17 is between the cover plate 1 and the display panel 2, and the orthographic projection of the second light guide part 17 on the cover plate 1 overlaps the orthographic projection of the display panel 2 on the cover plate 1. The second light guide part 17 can be bonded to the cover plate 1 through the second optically transparent adhesive layer 10, and the second light guide part 17 is spaced apart from the display panel 2. The orthographic projection of the first light guide part 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 part 19 is close to the first light source 3, the third light guide part 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 part 18 to the second light guide part 17, and then interacts with the dot structure 11 on the second light guide part 17.

[0105] Figure 10 is a schematic view of another light guide mechanism of the present example embodiment, Figure 11 is a schematic view of still another light guide mechanism of the present example embodiment, and as shown in some example embodiments, Figure 10 and Figure 11 As shown, the light guide mechanism 4 can be a non-equal-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 part 18 and a second light guide part 17, and the second light guide part 17 can be a non-symmetrical horn or a wedge-shaped horn.

[0106] Figure 12 This is a schematic diagram of another display module for this exemplary embodiment. In some exemplary embodiments, such as Figure 12 As shown, the display module also includes an anti-reflection film 20. The light guide mechanism 4 and the display panel 2 are spaced apart, and an air layer 9 can be formed between the light guide mechanism 4 and the display panel 2. The display panel 2 includes a polarizing layer 21 located near the end of the cover plate 1. The end face of the light guide mechanism 4 near the air layer 9 and the end face of the display panel 2 near the air layer 9 are both provided with anti-reflection films 20, which can reduce the reflection of light by the air layer 9. The anti-reflection film 20 occupies part of the space of the air layer 9, and the orthographic projection of the anti-reflection film 20 on the cover plate 1 overlaps with the orthographic projection of the display panel 2 on the cover plate 1. The applicant discovered that the air layer 9 between the light guide mechanism 4 and the display panel 2 in the relevant display module may cause an increase in reflectivity. The display module in this example can use an anti-reflection coating (ARC) technology to add an anti-reflection film 20 at the air interface (the surface of the light guide mechanism 4 facing the display panel 2, and the surface of the polarizing layer 21 facing the light guide mechanism 4) to avoid this problem. The anti-reflection film 20 can be formed by pasting or vapor deposition / spraying anti-reflection materials. The addition of the anti-reflection film 20 can reduce the reflectivity of each of these two layers from approximately 4% to less than 1%.

[0107] Figure 13 This is a schematic diagram of another display module of this exemplary embodiment. In some exemplary embodiments, such as Figure 13 As shown, the display module also includes a first optically transparent adhesive layer 22, which is located between the light guide mechanism 4 and the display panel 2. The light guide mechanism 4 and the display panel 2 are bonded together by the first optically transparent adhesive layer 22. In this example, the first optically transparent adhesive layer 22 fills the gap between the light guide mechanism 4 and the display panel 2, resulting in higher structural stability and better image quality for the display module. The first optically transparent adhesive layer 22 can be made of the same material as the second optically transparent adhesive layer 10. The ratio of the refractive indices of the light guide mechanism 4 and the first optically transparent adhesive layer 22 can be between 1 and 1.5. In this example, the refractive index of the first optically transparent adhesive layer 22 is relatively low. The refractive index of the light guide mechanism 4 can be between 1.5 and 1.7, and the refractive index of the first optically transparent adhesive layer 22 can be between 1 and 1.7. In this example, the refractive index of the first optically transparent adhesive layer 22 can be 1.2.

[0108] Figure 14 for Figure 13 A partial schematic diagram of the light guide mechanism in the image. Figure 15 for Figure 13 A schematic diagram of the bonding between the light guide mechanism and the first optically transparent adhesive layer is shown below. Figures 13 to 15As shown, the display module also includes multiple first films 23, which are adhered to the light guide surface 14 of the light guide mechanism 4. Each of the multiple first films corresponds one-to-one with a multiple dot structure 11, and the orthographic projection of the dot structure 11 onto the cover plate 1 lies within the orthographic projection of the first film 23 onto the cover plate 1. The first film 23 is sandwiched between the light guide mechanism 4 and the first optically transparent adhesive layer 22. The first film 23 is circular, and its diameter is D. In this example, D can be 50 micrometers. The first film 23 is formed by molding the dot structure 11 with polydimethylsiloxane (PDMS), which avoids the problem of light not reflecting due to the adhesion of the dot structure 11 and the first optically transparent adhesive layer 22. The placement of the first film 23 does not affect the adhesion of areas outside the dot structure 11, achieving the goal of full lamination between the light guide mechanism 4 and the first optically transparent adhesive layer 22, allowing the dot structure 11 to emit light normally. The first thin film 23 can be obtained through a printing process. The light guiding mechanism 4 with the first thin film 23 can be divided into a low-viscosity region 24 covering the first thin film 23 and a high-viscosity region 25 not covered by the first thin film 23. The dot structure 11 is located in the low-viscosity 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 structure 11. Due to the setting of the first thin film 23, the viscosity is reduced, so that the first optically transparent adhesive layer 22 can use its own elasticity to restore the state of no contact with the dot structure 11, thereby avoiding the problem that the dot structure 11 is filled and cannot reflect light.

[0109] Figure 16 This is a schematic diagram of another display module according to this exemplary embodiment. Figure 17 for Figure 16 A schematic diagram of the bonding between the light guide mechanism and the protective layer is shown in some exemplary embodiments, such as... Figure 16 and Figure 17 As shown, the display module also includes a protective layer 26, which is located between the light guide mechanism 4 and the first optically transparent adhesive layer 22. The protective layer 26 is bonded to the light guide mechanism 4, and the first optically transparent adhesive layer 22 is bonded to the protective layer 26. The bonding between the light guide mechanism 4 and the display panel 2 is a "hard-to-hard" bonding, requiring a certain thickness of the first optically transparent adhesive layer 22 to avoid bonding bubbles caused by warping. The step absorption capacity (deformation capacity) of the fully bonded 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 absorption capacity will fill the dot structure 11 of the light guide mechanism 4, causing the dots to be unable to emit light. The bonding between the protective layer 26 and the light guide mechanism 4 is a "soft-to-hard" bonding. The protective layer 26 has better shape following properties, and the adhesive can be thinned. The setting of the protective layer 26 can prevent the dot structure 11 of the light guide mechanism 4 from being filled by the fully bonded first optically transparent adhesive layer 22.

[0110] In some example embodiments, as shown in Figure 16 and Figure 17 The protective layer 26 includes a bonding adhesive 27 and a protective substrate 28 stacked in the first direction, and the bonding 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 bonding adhesive 27 can be H4, and the thickness of the bonding adhesive 27 can be the extension length of the bonding adhesive 27 in the first direction, wherein the ratio of H3 and H4 can be 0.1 to 10.

[0111] In some example embodiments, as shown in Figure 16 and Figure 17 The light guide mechanism 4 is set as a hard light guide plate, and the thickness (H4) of the bonding 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 bonding adhesive 27 can be 10 microns, the step absorption capacity is only 2 to 3 microns, and the thickness of the bonding 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 10-micron-high dot structure 11, resulting in that the dot structure 11 is filled, and the step absorption capacity of the bonding adhesive 27 in this example is only 2 to 3 microns, which does not affect the reflection ability of the dot structure 11.

[0112] In some example embodiments, as shown in Figure 16 and Figure 17 The light guide mechanism 4 can be a soft light guide film, the thickness of the light guide mechanism 4 is relatively thin, and the thickness of the bonding adhesive 27 can be 0.001 to 0.05 mm, so that the thickness of the bonding 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.

[0113] Figure 18 is a schematic view of another bending state of the light guide mechanism of the example embodiment, Figure 19 is a cross-sectional view of C-C in Figure 18 is a schematic view of the unfolded state of the light guide mechanism in Figure 20 is a schematic view of the preparation of the light guide mechanism in Figure 18 is a schematic view of the unfolded state of the light guide mechanism in Figure 21 is a schematic view of the preparation of the light guide mechanism in Figure 18 In some example embodiments, as shown in Figures 18 to 21As shown, the light guide mechanism 4 can be a soft light guide film, and the thickness of the light guide mechanism 4 is thin, which can be 50-200 microns. The thickness of the light guide film is small, and the size of the first light source 3 matched with the light guide film is too small to be processed and manufactured. The difficulty is reflected in the dispersion of the fluorescent glue, the high precision of the die bonding and welding. 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), wherein the material of the light guide film substrate (not shown in the figure) can be PC material and the thickness is 50 microns, and 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, and the resin layer (not shown in the figure) is cured after imprinting, forming the dot structure 11 with a height of 5 microns.

[0114] In some example embodiments, as Figures 18 to 21As shown, the light guide mechanism 4 can include a flat plate segment 29 and a plurality of bending segments 30, one end of the plurality of bending 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 flat plate segment 29 and the bending segments 30 have the same thickness, which is H5, the flat plate segment 29 and the bending segments 30 can be cut from a 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 bending 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 bending segments 30 is bent towards the third direction and extends to the first light source 3, the plurality of bending segments 30 are in the shape of "L", the ends of the plurality of bending 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 bending segments 30 close to the first light source 3 constitute the light inlet of the bending segments 30. The plurality of bending segments 30 includes a first bending segment 30-1, a second bending segment 30-2, …, and an Nth bending 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 bending segments 30 are arranged in sequence, and are stacked in the order of the first bending segment 30-1, the second bending segment 30-2, …, and the Nth bending segment 30-n, so that the thickness of the light guide mechanism 4 at this position is the sum of the thicknesses of the plurality of bending segments 30, i.e. equal to 60×n microns. In this example, the number of bending segments 30 is 30, i.e. n = 30, the total thickness (H) of the ends of the plurality of bending 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.

[0115] In some example embodiments, as Figures 18 to 21As shown, before completing the bending state, the light guide mechanism 4 needs to be prepared in an unfolded state. A light guide film is cut to form a flat plate segment 29 and multiple bent segments 30 extending in the second direction. The multiple bent segments 30 are arranged sequentially in the third direction, that is, in the order of first bent segment 30-1, second bent segment 30-2, ..., Nth bent segment 30-n. The length of the bent segment 30 is the dimension of the bent segment 30 along the second direction. The lengths of the multiple bent segments 30 are not equal, and the lengths of the multiple bent segments 30 increase sequentially along the third direction. For example, the length (S2) of the second bent segment 30-2 is greater than the length (S1) of the first bent segment 30-1. The length (S1) of the first bent segment 30-1 is the shortest, and the length of the Nth bent segment 30-n is the longest, so that the multiple bent 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. Multiple bending segments 30 need to be folded along the bending line 32 (i.e., folded along the bending line 32) to form the bent state of the light guide mechanism 4. The angle between the bending line 32 and the second direction is 45°, so that after folding along the bending line 32, the bending segments 30 bend towards the third direction. The bending lines 32 of the multiple bending segments 30 correspond in the second direction. During bending, the shortest bending segment 30-1 can be bent first, as shown... Figure 20 As shown, 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 multiple bending segments 30 will be superimposed on each other in the first direction at the end close to the first light source and flush in the third direction. The light inlets of the multiple bending segments 30 are gathered together, and the thickness of the multiple bending segments 30 after superposition is slightly greater than the thickness (L) of the first light source 3, which is beneficial 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. The bending tool can assist in the positioning and bending of the multiple bending segments 30.

[0116] Figure 22 This is a schematic diagram of another display module of this exemplary embodiment. In some exemplary embodiments, such as Figure 22As shown, the photoelectric conversion efficiency of the first light source 3 is lower than that of the visible light source. To ensure sufficient and effective infrared light is emitted from the display module, the heat emitted by the first light source 3 can be dissipated through the heat dissipation component 35, reducing the temperature of the first light source 3 and ensuring its efficient operation at a suitable temperature. The display module includes the heat dissipation component 35, which can be connected to the back plate 5. The first light source 3 is mounted on the heat dissipation component 35. The cover plate 1 can cover the heat dissipation component 35, meaning that the orthographic projection of the heat dissipation component 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 or stainless steel, and the heat dissipation component 35 can be integrally formed with the back plate 5, processed through bending, stamping, and other processes of a metal sheet. The backplate 5 includes a base plate 33 and an annular side plate 34. The base plate 33 is parallel to the cover plate 1, and the side plate 34 is perpendicular to the base plate 33 and connected to the base plate 33 at one end in a first direction. The base plate 33 and the side plate 34 form a mounting groove 12, with the end of the side plate 34 away from the base plate 33 forming the opening of the mounting groove 12. The heat dissipation assembly 35 may be plate-shaped. One end of the heat dissipation assembly 35 is connected to the end of the side plate 34 away from the base plate 33, and the other end of the heat dissipation assembly 35 extends away from the mounting groove 12. The heat dissipation assembly 35 is perpendicular to the side plate 34. The pads of the first light source 3 (not shown in the figure) are located on the side of the first light source 3 away from the cover plate 1. The pads of the first light source 3 (not shown in the figure) are mounted on the heat dissipation assembly 35. The light-emitting surface of the first light source 3 is the side surface of the first light source 3, that is, facing the end face of the light guide assembly 4. To further improve heat dissipation efficiency, thermally conductive tape can be used to fix the first light source 3 and the heat dissipation assembly 35. However, it is not limited to the heat dissipation component 35 and the back plate 5 being an integral part. For example, the heat dissipation component 35 and the back plate 5 can be connected by a detachable structure such as a snap-fit ​​or bolt, which can also achieve heat dissipation. In some exemplary embodiments, the heat dissipation component 35 has a heat dissipation structure on the side away from the first light source 3. The heat dissipation structure can be a device made of a material with high thermal conductivity, such as a graphite sheet or a graphene film, which is attached to the heat dissipation component 35.

[0117] Figure 23 This is a schematic diagram of another display module for this exemplary embodiment. In some exemplary embodiments, such as Figure 23As shown, 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 emitted from the display module, the heat generated by the first light source 3 can be discharged 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 the heat dissipation assembly 35, which can be connected with the back plate 5, and the first light source 3 is installed on the heat dissipation assembly 35. The cover plate 1 can cover the heat dissipation assembly 35, that is, 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 an aluminum plate or a 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 to 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 to 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, that is, the side of the first light source 3 away from the light guide assembly 4, and the solder pad (not shown in the figure) of the first light source 3 is installed on the heat dissipation assembly 35. The light emitting surface of the first light source 3 is the side surface of the first light source 3 opposite to the solder pad (not shown in the figure), that is, 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. In some example embodiments, a display device can include a housing and the display module described above, and the display module is installed on the housing. In some example 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 specific form of the display device is not specially limited in the embodiments of the present application.

[0118] In the above embodiments, the display module of the present example can emit infrared light that promotes user health without affecting image display, which has a positive impact on users.

[0119] Although the embodiments of the present application have been shown and described above, it should be understood that the above embodiments are exemplary and should not be construed as limiting the present application. Those skilled in the art can make changes, modifications, replacements and variations to the above embodiments within the scope of the present application.

Claims

1. A display module, characterized in that, Includes display panel, cover plate, first light source and light guide mechanism; The cover plate, the light guide mechanism, and the display panel are arranged sequentially 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. The first light source is configured to emit infrared light, and the light guiding mechanism is configured to guide the light emitted by the first light source toward the cover plate.

2. The display module according to claim 1, characterized in that, The light guide mechanism and the first light source are both projected onto the first plane, and their projections are both located within the projection of the cover plate onto the first plane. The first plane is parallel to the cover plate. The orthographic projection of the display panel on the first plane is positioned within the orthographic projection of the light guide mechanism on the first plane.

3. The display module according to claim 2, characterized in that, It also includes a back panel and a heat dissipation assembly, the display panel is mounted on the back panel, the heat dissipation assembly is disposed at the edge of the back panel, and the first light source is mounted on the heat dissipation assembly; The orthographic projection of the heat dissipation component on the first plane lies within the orthographic projection of the cover plate on the first plane.

4. The display module according to claim 1, characterized in that, The light guide mechanism has multiple dot structures on the side near the display panel, and the multiple dot structures are configured to convert the first light source into a surface light source.

5. The display module according to claim 4, characterized in that, The density of the dot structure is set to gradually increase in the second direction from the side closer to the first light source to the side farther away from the first light source.

6. The display module according to claim 5, characterized in that, The dot structure is configured such that the end of the light guide mechanism near the display panel is recessed on the side away from the display panel; The dot structure is set as a dotted dot structure; Alternatively, the dot structure can be configured as a grooved dot structure, with the grooved dots extending along a third direction, and multiple grooved dots arranged at intervals in a second direction, the third direction being perpendicular to the second direction and parallel to the cover plate.

7. The display module according to claim 6, characterized in that, The end face of the light guide mechanism near the display panel is set as a light guide surface, and the angle between the end face of the dot structure near the first light source and the light guide surface is the light-facing angle, which is set to 30° to 60°.

8. The display module according to claim 4, characterized in that, The light guide mechanism is configured as a plate material of equal thickness that is parallel to the cover plate.

9. The display module according to claim 4, characterized in that, The light guiding mechanism includes a first light guiding part and a second light guiding part. The first light guiding part is connected to the second light guiding part at one end in the second direction, and the other end extends toward the first light source. The orthographic projection of the first light guide portion on the first plane does not overlap with the orthographic projection of the display panel on the first plane. The thickness of the first light guide portion is set to gradually decrease from the end closer to the first light source to the end closer to the first light guide portion. The first plane is parallel to the cover plate. The thickness of the second light guide is less than that of the first light guide. The orthographic projection of the second light guide on the first plane overlaps with the orthographic projection of the display panel on the first plane. Multiple dot structures are disposed on the second light guide.

10. The display module according to claim 1, characterized in that, It also includes two antireflective coatings. 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; The light guide mechanism is provided with an anti-reflection film on the end face near the air layer, and the display panel is provided with another anti-reflection film on the end face near the air layer. The anti-reflection film is configured to reduce the reflection of light by the air layer.

11. The display module according to claim 4, characterized in that, It also includes a first optically transparent adhesive layer, which is located between the light guide mechanism and the display panel, and the light guide mechanism and the display panel are bonded together by the first optically transparent adhesive layer.

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

5.

13. The display module according to claim 12, characterized in that, 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.

14. The display module according to claim 11, characterized in that, It also includes a plurality of first films, which are located on the end face of the light guide mechanism near the display panel, and the orthographic projection of one of the dot structures on the cover plate is located within the orthographic projection of one of the first films on the cover plate.

15. The display module according to claim 11, characterized in that, It also includes a protective layer located between the light guide mechanism and the first optically transparent adhesive layer.

16. The display module according to claim 15, characterized in that, The protective layer includes an adhesive and a protective substrate stacked in the first direction, wherein the adhesive is located on the side of the protective substrate closer 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 adhesive in the first direction is set to 0.1 to 10.

17. The display module according to claim 16, characterized in that, The light guide mechanism is configured as a rigid light guide plate, and the extension length of the adhesive in the first direction is set to 0.01 to 0.05 mm.

18. The display module according to claim 16, characterized in that, The light guiding mechanism is configured as a soft light guiding film, and the extension length of the adhesive in the first direction is set to 0.001 to 0.05 mm.

19. The display module according to claim 18, characterized in that, The light guide mechanism includes a flat plate segment and multiple bent segments. The orthographic projection of the flat plate segment on the cover plate overlaps with the orthographic projection of the display panel on the cover plate. Multiple dot structures are disposed on the flat plate segment. One end of each of the multiple bent segments is connected to one end of the flat plate segment in the second direction and arranged sequentially along a third direction, the third direction being perpendicular to the second direction and parallel to the cover plate; The other ends of the plurality of bent segments are bent toward the first light source and are stacked in the first direction.

20. The display module according to claim 3, characterized in that, The heat dissipation component and the back plate are integrated into one piece.

21. A display device, characterized in that, It includes a housing and a display module as described in any one of claims 1 to 20, wherein the display module is mounted on the housing.

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