Display device

Abstract

The embodiment of the utility model provides a display device, relates to the technical field of display, and is used for solving the heat dissipation problem of the display device. The display device comprises an optical assembly, a shell and a heat dissipation assembly. The optical assembly comprises a display module and a reflection module. The display module has a light emitting surface. The reflector group comprises a first lens and a second lens, the first lens is provided with a first reflecting surface, and the second lens is provided with a second reflecting surface; light emitted from the light emitting surface sequentially passes through the first reflecting surface and the second reflecting surface and then is emitted out of the shell. The housing is used for fixing the optical assembly. The heat dissipation assembly is connected with the shell and located on the side, away from the light emitting face, of the display module. The display surface device is used for displaying images.

Description

Technical Field

[0001] The present disclosure relates to the field of display technology, and in particular to a display device. Background Art

[0002] The telescopic light screen is a display device that uses the principle of mirror reflection to achieve the purpose of long-distance reading while reading at a close distance, avoiding eye fatigue caused by long-term close-range eye use, thereby reducing the chance of myopia.

[0003] Among them, the telephoto light screen includes a display module. As the brightness and resolution of the display module increase, the heat generated by the display module gradually increases. However, the overall heat dissipation capacity of the existing telephoto light screen is insufficient and needs to be further optimized. Utility Model Content

[0004] An object of the embodiments of the present disclosure is to provide a display device for solving the heat dissipation problem of the display device.

[0005] To achieve the above objectives, the embodiments of the present disclosure provide the following technical solutions:

[0006] In one aspect, a display device is provided. The display device includes an optical component, a housing, and a heat dissipation component. The optical component includes a display module and a reflection module. The display module has a light-emitting surface. The reflection lens group includes a first lens and a second lens, the first lens has a first reflection surface, and the second lens has a second reflection surface; the light emitted from the light-emitting surface passes through the first reflection surface and the second reflection surface in sequence, and then is emitted out of the housing. The housing is used to fix the optical component. The heat dissipation component is connected to the housing, and the heat dissipation component is located on a side of the display module away from the light-emitting surface.

[0007] In the above display panel, after the light passes through the first reflective surface and the second reflective surface, an image with a longer viewing distance can be formed, which reduces the distance between the human eye and the final image, and effectively relieves visual fatigue. The heat dissipation component disperses the heat generated by the display module in the housing to the outside of the housing, plays a heat dissipation role, and prevents the optical component from operating at high temperature for a long time, thereby extending the service life of the optical component, and further extending the service life of the display device.

[0008] In some embodiments, the heat dissipation assembly includes heat dissipation fins, and the heat dissipation fins are connected to the housing.

[0009] In some embodiments, the heat dissipation fins include a heat conductive sheet and a heat sink, and the heat conductive sheet and the heat sink are sequentially arranged in a direction away from the display module.

[0010] In some embodiments, the thermal conductive sheet is a copper sheet, and / or the heat sink is an aluminum extruded heat sink.

[0011] In some embodiments, the heat dissipation assembly further includes at least one connecting member, and the heat dissipation fins are connected to the housing via the connecting member.

[0012] In some embodiments, the heat dissipation assembly further includes a refrigerator, the refrigerator includes a cooling surface and a heating surface, the cooling surface is closer to the display module than the heating surface, and the heating surface is connected to the heat dissipation fins.

[0013] In some embodiments, the heat dissipation assembly further includes a heat dissipation film, which is disposed between the display module and the heat dissipation fins.

[0014] In some embodiments, the heat dissipation film covers the surface of the display module away from the light emitting surface.

[0015] In some embodiments, the heat dissipation film includes a plurality of heat dissipation holes penetrating the heat dissipation film.

[0016] In some embodiments, the heat dissipation film has an edge region and a middle region, and the edge region is located on at least one side of the middle region; and a plurality of heat dissipation holes are disposed in the edge region of the heat dissipation film.

[0017] In some embodiments, the heat dissipation film includes at least one graphene layer and at least one copper foil layer which are stacked.

[0018] In some embodiments, the heat dissipation assembly further includes a fan, which is disposed on a side of the display module away from the light emitting surface.

[0019] In some embodiments, the display module is detachably disposed in the housing. The housing includes a main housing and a bottom cover, the bottom cover is opposite to a side of the display module away from the light-emitting surface, and the bottom cover is detachably connected to the main housing. The bottom cover is provided with a heat dissipation port, and a side of the bottom cover away from the display module is connected to a heat dissipation assembly.

[0020] In some embodiments, a first groove is provided on one side of the bottom cover close to the display module, the heat dissipation vent passes through the bottom of the first groove, and the display module is placed in the first groove.

[0021] In some embodiments, the optical component further includes a plano-convex lens. The plano-convex lens is disposed between the light-emitting surface of the display module and the first reflective surface of the first lens. The plano-convex lens includes a light-entering plane and a light-emitting convex surface, and the light-entering plane is closer to the display module than the light-emitting convex surface. The light-entering plane is parallel to the light-emitting surface of the display module, and the light-emitting convex surface protrudes in a direction away from the display module. The plano-convex lens is provided with an anti-reflection film.

[0022] In some embodiments, the display brightness of the display module is 2000 cd / m 2 ~3000cd / m 2 , and / or, the resolution of the display module is greater than or equal to 1080p. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the present disclosure, the following briefly introduces the drawings required to be used in some embodiments of the present disclosure. Obviously, the drawings described below are only drawings of some embodiments of the present disclosure. For ordinary technicians in this field, other drawings can also be obtained based on these drawings. In addition, the drawings described below can be regarded as schematic diagrams, and are not limitations on the actual size of the product involved in the embodiments of the present disclosure, the actual process of the method, the actual timing of the signal, etc.

[0024] Figure 1 A structural diagram of a display device provided in an embodiment of the present disclosure;

[0025] Figure 2 For along Figure 1 A cross-sectional view taken along line A1-A2 in FIG.

[0026] Figure 3 Light path diagram provided for an embodiment of the present disclosure.

[0027] Figure 4 A top view of a display device provided in an embodiment of the present disclosure;

[0028] Figure 5 An isometric view of a display device provided in accordance with an embodiment of the present disclosure;

[0029] Figure 6 A structural diagram of a housing provided in an embodiment of the present disclosure;

[0030] Figure 7 A structural diagram of a display device provided in an embodiment of the present disclosure;

[0031] Figure 8 A structural diagram of a display device provided in an embodiment of the present disclosure;

[0032] Fig. 9 A side view of a display device provided in accordance with an embodiment of the present disclosure;

[0033] Fig.10 A partial exploded view of a display device provided in an embodiment of the present disclosure;

[0034] Fig.11 Another exploded view of a display device provided in an embodiment of the present disclosure;

[0035] Fig.12 Another exploded view of a display device provided in an embodiment of the present disclosure;

[0036] Fig.13 An exploded view of a heat dissipation assembly and a display module provided in an embodiment of the present disclosure. DETAILED DESCRIPTION

[0037] The following will be combined with the accompanying drawings to clearly and completely describe the technical solutions in some embodiments of the present disclosure. Obviously, the described embodiments are only part of the embodiments of the present disclosure, rather than all the embodiments. Based on the embodiments provided by the present disclosure, all other embodiments obtained by ordinary technicians in this field belong to the scope of protection of the present disclosure.

[0038] Unless the context requires otherwise, throughout the specification and claims, the term "including" is to be interpreted as an open, inclusive meaning, that is, "including, but not limited to". In the description of the specification, the terms "one embodiment", "some embodiments", "exemplary embodiments", "examples" or "some examples" and the like are intended to indicate that specific features, structures, materials or characteristics associated with the embodiment or example are included in at least one embodiment or example of the present disclosure. The schematic representations of the above terms do not necessarily refer to the same embodiment or example. In addition, the specific features, structures, materials or characteristics described may be included in any one or more embodiments or examples in any appropriate manner.

[0039] In the following, the terms "first" and "second" are used for descriptive purposes only and are not to be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the embodiments of the present disclosure, unless otherwise specified, "plurality" means two or more.

[0040] When describing some embodiments, the expressions "coupled" and "connected" and their derivatives may be used. The term "connected" should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium. The term "coupled" indicates, for example, that two or more components are in direct physical or electrical contact. The term "coupled" or "communicatively coupled" may also refer to two or more components that are not in direct contact with each other, but still cooperate or interact with each other. The embodiments disclosed herein are not necessarily limited to the contents of this document.

[0041] “At least one of A, B, and C” has the same meaning as “at least one of A, B, or C” and both include the following combinations of A, B, and C: A only, B only, C only, the combination of A and B, the combination of A and C, the combination of B and C, and the combination of A, B, and C.

[0042] “A and / or B” includes the following three combinations: A only, B only, and a combination of A and B.

[0043] The use of "adapted to" or "configured to" herein is meant to be open and inclusive language that does not exclude devices adapted or configured to perform additional tasks or steps.

[0044] Additionally, the use of “based on” is meant to be open and inclusive, as a process, step, calculation, or other action “based on” one or more stated conditions or values ​​may, in practice, be based on additional conditions or values ​​beyond those stated.

[0045] As used herein, "about," "substantially," or "approximately" includes the stated value and an average value that is within an acceptable range of variation from the particular value as determined by one of ordinary skill in the art taking into account the measurements in question and the errors associated with the measurement of the particular quantity (i.e., the limitations of the measurement system).

[0046] As used herein, "parallel", "perpendicular", and "equal" include the situations described and situations similar to the situations described, and the range of the similar situations is within the acceptable deviation range, wherein the acceptable deviation range is determined by a person of ordinary skill in the art taking into account the measurement in question and the errors associated with the measurement of a particular quantity (i.e., the limitations of the measurement system). For example, "parallel" includes absolute parallelism and approximate parallelism, wherein the acceptable deviation range of approximate parallelism may be, for example, a deviation within 5°; "perpendicular" includes absolute perpendicularity and approximate perpendicularity, wherein the acceptable deviation range of approximate perpendicularity may also be, for example, a deviation within 5°. "Equal" includes absolute equality and approximate equality, wherein the acceptable deviation range of approximate equality may be, for example, the difference between the two equalities is less than or equal to 5% of either one.

[0047] It will be understood that when a layer or an element is referred to as being on another layer or substrate, it can be directly on the other layer or substrate, or intervening layers may be present between the layer or element and the other layer or substrate.

[0048] Exemplary embodiments are described herein with reference to cross-sectional views and / or plan views that are idealized exemplary drawings. In the drawings, the thickness of the layers and the area of ​​the regions are exaggerated for clarity. Therefore, variations in the shapes relative to the drawings due to, for example, manufacturing techniques and / or tolerances are conceivable. Therefore, the exemplary embodiments should not be interpreted as being limited to the shapes of the regions shown herein, but include shape deviations due to, for example, manufacturing. For example, an etched region shown as a rectangle will typically have curved features. Therefore, the regions shown in the drawings are schematic in nature, and their shapes are not intended to illustrate the actual shapes of the regions of the device, and are not intended to limit the scope of the exemplary embodiments.

[0049] With the popularity of mobile phones, computers and other products, people spend more and more time looking at electronic screens. Generally, the human eye can directly watch the image displayed on the electronic screen, and the distance between the human eye and the image is the viewing distance. If you watch an image with a short viewing distance for a long time, it is easy to cause visual fatigue. If you do this for a long time, you will have problems such as myopia. In order to relieve visual fatigue, the human eye needs to watch the distant scenery from time to time to increase the distance between the human eye and the image, so that the eye is in a relatively relaxed state.

[0050] The embodiments of the present disclosure provide a display device, wherein the distance between an image finally displayed by the display device and human eyes is relatively far, so as to achieve the purpose of near-field and far-field viewing.

[0051] Figure 1 A structural diagram of a display device provided in an embodiment of the present disclosure. Figure 2 For along Figure 1 A cross-sectional view taken along line A1-A2 in FIG.

[0052] See also Figure 1 and Figure 2 The display device 1000 includes an optical assembly 100. The optical assembly 100 is used to form an image with a long viewing distance. Specifically, the optical assembly 100 includes a display module 10 and a reflector assembly 20.

[0053] The display module 10 is used to display images (including static images or dynamic images, where the dynamic images can be videos). The display module 10 has a light emitting surface 101 and a backlight surface away from the light emitting surface 101 . Light from the display module 10 is emitted outward from the light emitting surface 101 .

[0054] Exemplarily, the display module 10 can be a display panel, for example, a self-luminous display panel, and the display panel can be any one of an organic light emitting diode (OLED) display panel, a quantum dot light emitting diode (QLED) display panel, and a micro light emitting diode (Mini LED or Micro LED) display panel.

[0055] As another example, the display module 10 may include a display panel and a backlight module. The display panel may be a liquid crystal display panel. The backlight module is disposed on the back of the liquid crystal display panel and is configured to provide backlight to the liquid crystal display panel. For example, the backlight module is provided with lamp beads and a light guide plate. The lamp beads are disposed on at least one side of the light guide plate. The light emitted by the lamp beads is incident on the light guide plate to provide backlight for the display panel. Among them, the lamp beads may be full-natural spectrum lamp beads. The light generated by the full-natural spectrum lamp beads is closer to the reading effect under the sun, that is, the bionic outdoor distant image perception. Under high brightness conditions, the upper D1 receptors of the retinal cells are activated, achieving the effect of suppressing myopia, which can play a role in protecting eyesight.

[0056] In some examples, the lamp beads are evenly distributed on the sides of the light guide plate to provide uniform light.

[0057] The reflective lens assembly 20 includes a first lens 21 and a second lens 22 . Light emitted from the light-emitting surface 101 of the display module 10 is reflected by the first lens 21 and the second lens 22 in sequence and then emitted out of the housing 200 .

[0058] Specifically, the first lens 21 has a first reflective surface 211. The first reflective surface 211 is at least partially opposite to the light emitting surface 101. The light emitted from the light emitting surface 101 is at least partially (for example, partially, or all) irradiated to the first reflective surface 211, and then reflected by the first reflective surface 211 and emitted to the second lens 22. In some examples, the first lens 21 covers the light emitting surface of the display module 10. Exemplarily, in the orthographic projection to the plane where the light emitting surface 101 of the display module 10 is located, the first lens 21 covers the entire light emitting surface 101, and the light emitted from the light emitting surface 101 is irradiated to the first reflective surface 211 as much as possible, providing more light for the second reflection to improve the clarity of the image finally formed. The first lens 21 can be any lens that can reflect light, such as a free-form surface reflector, a plane reflector, a diffraction mirror, or a Fresnel reflector.

[0059] Specifically, the second lens 22 has a second reflective surface 221, and the second reflective surface 221 is at least partially opposite to the first reflective surface 211. After the light reflected by the first reflective surface 211, at least part (for example, part, or all) of it is irradiated to the second reflective surface 221, and the light is reflected by the second reflective surface 221 and emitted to the outside of the housing 200 to form the final displayed image. In some examples, the second lens 22 covers the first reflective surface 211 of the first lens 21. Exemplarily, in the orthographic projection to the plane where the first reflective surface 211 is located, the second lens 22 covers the entire first reflective surface 211, and the light reflected by the first reflective surface 211 is irradiated to the second reflective surface 221 as much as possible, so as to increase the number of light emitted outside the housing 200, so as to improve the clarity of the final image formed. The second lens 22 can be any one of a spherical mirror, a free-form reflector, a diffraction mirror, and a Fresnel reflector.

[0060] In some examples, a triangular cavity is formed between the first lens 21, the second lens 22 and the display module 10. That is, the extension directions of the first lens 21, the second lens 22 and the display module 10 intersect with each other, the first lens 21 is tilted relative to the display module 10, the second lens 22 is tilted relative to the first lens 21, and the second lens 22 is tilted relative to the display module 10. For example, the angle formed between the first lens 21 and the light-emitting surface 101 is an acute angle (for example, 45°), the angle formed between the second lens 22 and the first lens 21 is an acute angle, and the angle formed between the second lens 22 and the light-emitting surface 101 is an obtuse angle or a right angle, so that as much light as possible emitted from the light-emitting surface 101 is irradiated onto the first lens 21, and then onto the second lens 22, forming a light path. Only light emitted from the light-emitting surface 101 with a larger emission angle may irradiate the second lens 22, which can further reduce the number of light rays directly irradiated from the light-emitting surface 101 to the second reflective surface 221, thereby improving the clarity of the image finally formed. The embodiment of the present disclosure is exemplified by taking the first lens 21 as a plane reflector and the second lens 22 as a free-form reflector. The first lens 21 may be a semi-transparent and semi-reflective mirror, where semi-transparent and semi-reflective only means that part of the light is transmitted and part of the light is reflected.

[0061] Figure 3 Light path diagram provided for an embodiment of the present disclosure.

[0062] See also Figure 3 , the image displayed by the display module 10 is the first image B1-B2, and the light emitted by the display module 10 is emitted from the light emitting surface 101 ( Figure 3The light is emitted from the first lens 21 (not shown) and is reflected for the first time by the first reflection surface 211 of the first lens 21. At this time, the first lens 21 forms a second image C1-C2 that is inverted left and right relative to the first image B1-B2, and the second image C1-C2 is a positive virtual image. The light after the first reflection is reflected for the second time by the second reflection surface 221 of the second lens 22. At this time, the second lens 22 forms a third image D1-D2 that is inverted left and right again relative to the second image C1-C2. The light after the second reflection passes through one side of the first lens 21 (the side close to the second reflection surface 221), and the observer standing on the other side of the first lens 21 (the side away from the second reflection surface 221) can see the third image D1-D2. At this time, due to the two left-right inversions, the left-right direction of the third image D1-D2 finally obtained is consistent with the first image B1-B2 directly displayed by the display module 10. Therefore, the distance between the third image D1-D2 finally displayed by the optical component 100 and the human eye is greater than the distance between the first image B1-B2 displayed by the display module 10 and the human eye. That is to say, the image actually seen by the human eye (the third image D1-D2) is located at a farther viewing distance. The light emitted by the display module 10 passes through the semi-transparent and semi-reflective first lens 21 and then presents an enlarged virtual image through the second lens 22, so that the image size seen by the human eye through the optical component 100 is enlarged. For example, for a 7-inch screen, the final enlarged virtual image can reach 100 inches to 200 inches. At this time, the viewing distance of the human eye is also increased. The user sees a virtual image 5m to 10m away in the optical component 100 with a thickness of several tens of centimeters, which increases the imaging distance and achieves the purpose of long-distance eye use. The human eye is always in a relatively relaxed state, which can effectively relieve visual fatigue.

[0063] In some embodiments, see Figure 2 The optical assembly 100 further includes a lens group 30. The lens group 30 is disposed between the light-emitting surface 101 of the display module 10 and the first reflective surface 211 of the first lens 21. The light emitted from the light-emitting surface 101 is refracted in the lens group 30, and then reflected by the first reflective surface 211 and the second reflective surface 221 in sequence, and then emitted out of the housing 200.

[0064] Since the lens group 30 has a refracting effect on light, the light emitted from the light emitting surface 101 of the display module 10 is refracted by the lens group 30 and then subjected to image distortion correction. The light irradiation area is large and the brightness is uniform, which can change the distortion at the corners of the final displayed image, making the displayed image clearer, thereby improving the viewing experience and usage experience.

[0065] In some embodiments, see Figure 2, the lens group 30 includes a plano-convex lens 31. That is, the plano-convex lens 31 is disposed between the light-emitting surface 101 of the display module 10 and the first reflective surface 211 of the first lens 21. The plano-convex lens 31 includes a light-entering plane 311 and a light-emitting convex surface 312. The light-entering plane 311 is closer to the display module 10 than the light-emitting convex surface 312, and the light-emitting convex surface 312 bulges away from the display module 10. The light-entering plane 311 is parallel to the light-emitting surface 101 of the display module 10, so that more light is emitted from the light-emitting surface 101, enters the plano-convex lens 31 from the light-entering plane 311, and after being refracted in the plano-convex lens 31, is set to the first lens 21 from the light-emitting convex surface 312. The more light enters the plano-convex lens 31, the more light is refracted, and the smaller the corner distortion of the image finally displayed is, so as to improve the imaging quality.

[0066] In some examples, the lens group 30 covers the light-emitting surface 101 of the display module 10. Exemplarily, in the orthographic projection to the plane where the light-emitting surface 101 of the display module 10 is located, the light-incident plane 311 of the plano-convex lens 31 covers the entire light-emitting surface 101, and as much light as possible emitted from the light-emitting surface 101 is refracted by the plano-convex lens 31 and then emitted, so as to improve the imaging quality of the image finally formed.

[0067] In some embodiments, the plano-convex lens 31 is provided with an anti-reflection film (not shown in the figure). Specifically, an anti-reflection film is provided on the outer surface of the plano-convex lens 31. The anti-reflection film can increase the intensity of the transmitted light, thereby improving the imaging quality. A portion of the light emitted from the light-emitting surface 101 is reflected on the surface of the light-entering plane 311. This portion of the reflected light not only reduces the light entering the lens group 30, but also forms stray light in the optical component 100, changes the light path, and affects the imaging quality of the display device 1000. The embodiment of the present disclosure increases the number of light emitted by the lens group 30 by providing an anti-reflection film, reduces the number of reflected light on the surface of the light-entering plane 311, and reduces stray light to improve the imaging quality. The material of the anti-reflection film can be MgF2, TiO2, ZnSe, ZnS ceramic infrared light infrared anti-reflection film, vinyl silsesquioxane hybrid film, etc. The refractive index of the anti-reflection film should be close to 1.23. The coating methods include vacuum evaporation, chemical vapor deposition, sol-gel coating and the like.

[0068] In some embodiments, the display brightness of the display module 10 is 2000 cd / m 2 ~3000cd / m 2 The greater the brightness of the display module 10, the more light is emitted from the light emitting surface 101. After secondary reflection, the final image has more light, which makes the final image brighter and improves the image quality.

[0069] In some embodiments, the resolution of the display module 10 is greater than or equal to 1080p. The larger the image resolution of the display module 10, the more pixels per unit area. After secondary reflection, the more pixels per unit area in the final image, so that the final image resolution is higher to improve the imaging quality.

[0070] Figure 4 A top view of a display device provided in an embodiment of the present disclosure. Figure 5 An isometric view of a display device provided in accordance with an embodiment of the present disclosure.

[0071] See also Figure 1 , Figure 2 , Figure 4 and Figure 5 In order to avoid interference of external light on the internal optical path of the optical component 100 (not shown in the figure) and affect the clarity of the final displayed image, the display device 1000 also includes a housing 200, which is used to fix the optical component 100. Exemplarily, the display module 10 is connected to the housing 200, and the connection method can be a fixed connection, such as welding the display module 10 to the inner wall of the housing 200, or connecting the display module 10 to the inner wall of the housing 200 through an adhesive; the connection method can also be a detachable connection, such as the display module 10 is clamped on the inner wall of the housing 200, or connecting the display module 10 to the housing 200 through bolts. The reflector group 20 is located in the housing 200, the first lens 21 is connected to the housing 200, and the second lens 22 is connected to the housing. The connection method can refer to the above description and will not be repeated here. The light emitting surface 101, the first reflection surface 211 and the second reflection surface 221 can be located in the housing 200, or on the side wall of the housing 200.

[0072] Figure 6 A structural diagram of a shell provided in an embodiment of the present disclosure. Figure 7 A structural diagram of a display device provided in an embodiment of the present disclosure. Figure 8 A structural diagram of a display device provided in an embodiment of the present disclosure.

[0073] See also Figure 6 , Figure 7 and Figure 8The housing 200 is provided with a first window 201, and at least a portion of the first lens 21 is opposite to the first window 201. The observer sees the image finally presented by the optical component 100 through the first window 201. The housing 200 may also be provided with a second window 202, and at least a portion of the second lens 22 is opposite to the second window 202. The light emitted by the light emitting surface 101 always propagates between the light emitting surface 101, the first reflection surface 211, and the second reflection surface 221. External light will not irradiate between the light emitting surface 101, the first reflection surface 211, and the second reflection surface 221. The light propagation is not affected by external light, thereby improving the imaging quality.

[0074] In some examples, the display module 10 generates heat during operation. Part of this heat comes from the luminous heat of the display module 10, part comes from the radiant energy generated by the light, and part comes from the circuit part of the display module 10. If the display module 10 is in a high temperature state for a long time, it will accelerate the aging of the electronic components and shorten the service life of the display module 10. In addition, this heat accumulates in the housing 200 and is difficult to be discharged in time, causing the housing 200 to heat up, and then causing the display device 1000 to heat up as a whole, affecting the service life, stability and safety of the display device 1000. Therefore, it is necessary to perform heat dissipation treatment on the display device 1000.

[0075] Fig. 9 A side view of a display device provided in accordance with an embodiment of the present disclosure.

[0076] See also Figure 7 to Figure 9 The display device 1000 of the embodiment of the present disclosure further includes a heat dissipation assembly 300, which is used to absorb and dissipate the heat generated inside the display device 1000 to maintain the normal operating temperature of the display device 1000. The heat dissipation assembly 300 is connected to the housing 200, and the heat dissipation assembly 300 disperses the heat transmitted from the display module 10 to the housing 200 to the outside of the housing 200, reduces the temperature inside the housing 200, and prolongs the service life of the display device 1000.

[0077] Fig.10 A partial exploded view of a display device provided in an embodiment of the present disclosure.

[0078] In some embodiments, see Fig.10 The heat dissipation component 300 is located on the side of the display module 10 away from the light emitting surface 101 (hereinafter referred to as the backlight surface 102). In this way, the distance between the heat dissipation component 300 and the display module 10 is relatively close, and the heat generated by the display module 10 can be directly dispersed and discharged outside the housing 200 through the heat dissipation component 300, so as to achieve the purpose of rapid heat dissipation.

[0079] In some embodiments, see Fig.10The housing 200 includes a main housing 40 and a bottom cover 50. Exemplarily, the main housing 40 is provided with an opening 41, and the bottom cover 50 covers the opening 41. The optical component 100 is connected to the main housing 40. The connection method can be referred to the above description and will not be repeated here.

[0080] The bottom cover 50 is opposite to the backlight surface 102 of the display module 10. In some examples, the bottom cover 50 is substantially parallel to the backlight surface of the display module 10. The main housing 40 and the bottom cover 50 are detachably connected. For example, the main housing 40 and the bottom cover 50 are connected by studs, such as hot melt studs; for another example, the main housing 40 and the bottom cover 50 are mutually clamped; the main housing 40 and the bottom cover 50 can also be detachably connected in other ways, which will not be described here. The detachable connection between the main housing 40 and the bottom cover 50 facilitates opening the main housing 40 and replacing the components of the optical assembly 100.

[0081] The bottom cover 50 is provided with at least one (e.g., one, or more) heat dissipation vent 51, which penetrates the bottom cover 50. The side of the bottom cover 50 away from the display module 10 is connected to the heat dissipation assembly 300. The heat dissipation assembly 300 may be opposite to the heat dissipation vent 51, and the heat generated by the display module 10 is quickly dispersed outside the housing 200 through the heat dissipation vent 51 through the heat dissipation assembly 300; the heat dissipation assembly 300 may also not be opposite to the heat dissipation vent 51, and the heat generated by the display module 10 is dispersed outside the housing 200 from the heat dissipation vent 51; the heat dissipation assembly 300 may also be partially opposite to the heat dissipation vent 51, and the other part may not be opposite to the heat dissipation vent.

[0082] Fig.11 Another exploded view of a display device provided according to an embodiment of the present disclosure.

[0083] In some embodiments, see Fig.11 , a first groove 52 is provided on one side of the bottom cover 50 close to the display module 10, a heat dissipation port 51 runs through the bottom of the first groove 52, the display module 10 is placed in the first groove 52, and the first groove 52 limits the display module 10, thereby preventing the display module 10 from moving during the use of the display device, causing the problem of light deviation. Exemplarily, in the direction parallel to the plane where the light emitting surface 101 is located, the size of the first groove 52 is the same as the size of the display module 10, and the display module 10 is placed in the first groove 52, which limits the position of the display module 10 and reduces the range of movement of the display module 10 in the direction parallel to the plane where the light emitting surface 101 is located.

[0084] It can be understood that, in the direction perpendicular to the plane where the display module 10 is located, the depth of the first groove 52 may be greater than the thickness of the display module 10, in which case the display module 10 is completely located in the first groove 52; the depth of the first groove 52 may be equal to the thickness of the display module 10, in which case the display module 10 is flush with the end of the first groove 52 away from the heat dissipation assembly 300; the depth of the first groove 52 may be less than the thickness of the display module 10, in which case the display module 10 exceeds the first groove 52.

[0085] In some embodiments, see Fig.11 The shell 200 also includes a lens holder 60 for supporting the lens group 30. The lens holder 60 is located inside the main shell 40, and can also be located on the side wall of the main shell 40. The lens holder 60 is connected to the main shell 40, and the connection method can refer to the connection method between the first lens 21 and the shell 200 mentioned above, which will not be repeated here. The lens group 30 is connected to the lens holder 60. For example, the lens group 30 is detachably arranged on a side of the lens holder 60 away from the display module 10. The lens holder 60 is provided with a first opening 61, and the first opening 61 passes through the lens holder 60, and the first opening 61 is located between the lens group 30 and the display module 10. In this way, the light emitted from the light emitting surface 101 of the display module 10 enters the lens group 30 through the first opening 61, thereby improving the quality of the displayed image.

[0086] Fig.12 Another exploded view of a display device provided according to an embodiment of the present disclosure.

[0087] In some embodiments, see Fig.12 , a second groove 62 is provided on one side of the lens holder 60 close to the display module 10, and the first opening 61 passes through the bottom of the second groove 62. The display module 10 can be placed in the second groove 62. The second groove 62 plays a limiting role, thereby preventing the display module 10 from moving during the use of the display device, causing the problem of light deviation. Exemplarily, in the direction parallel to the plane where the light emitting surface 101 is located, the size of the second groove 62 is the same as the size of the display module 10, and the display module 10 is placed in the second groove 62 to limit the position of the display module 10 and reduce the movement range of the display module 10 in the direction parallel to the plane where the light emitting surface 101 is located.

[0088] In a direction perpendicular to the plane where the display module 10 is located, the depth of the first groove 52 and the second groove 62 may be greater than or equal to the thickness of the display module 10 , limiting the movement range of the display module 10 in the direction perpendicular to the plane where the display module 10 is located.

[0089] Fig.13 An exploded view of a heat dissipation assembly and a display module provided in an embodiment of the present disclosure.

[0090] In some embodiments, see Fig.13 The heat dissipation assembly 300 includes a heat dissipation module including heat dissipation fins 70, and the heat dissipation fins 70 are connected to the housing 200. The connection method can be a fixed connection, such as welding the heat dissipation fins 70 to the outer wall of the housing 200, or connecting the heat dissipation fins 70 to the outer wall of the housing 200 through an adhesive; the connection method can also be a detachable connection, such as connecting the heat dissipation fins 70 to the housing 200 through bolts. The heat dissipation fins 70 can be located outside the housing 200, on the side wall of the housing 200, or inside the housing 200. The heat dissipation fins 70 absorb the heat generated by the display module 10 and disperse the heat absorbed by the heat dissipation fins 70 to the outside of the housing 200, thereby reducing the temperature inside the housing 200. In addition, the heat dissipation fins 70 are opposite to the backlight surface 102 of the display module 10. The heat generated by the display module 10 can be quickly transferred from the side of the backlight surface 102 to the heat dissipation fins 70, so as to reduce the time that the display module 10 works in a high temperature state, thereby improving the service life of the display module 10, and further improving the service life of the display device 1000.

[0091] In some embodiments, see Fig.13 The heat sink 70 includes a heat conductive sheet 71 and a heat sink 72. The heat conductive sheet 71 is arranged on the side of the heat sink 72 close to the display module 10. In this way, the heat conductive sheet 71 and the heat sink 72 are arranged in sequence in the direction away from the display module 10. The heat conductive sheet 71 is connected to the heat sink 72. The heat conductive sheet 71 absorbs heat and the heat sink 72 disperses heat. The heat sink 72 includes a plurality of metal sheets with strong thermal conductivity. The surface area of ​​the plurality of metal sheets is large. Heat transfer occurs between these metal sheets and between the metal sheets and the air. Convection channels are formed between adjacent metal sheets, which significantly increases the heat dissipation speed of the heat sink 70. Heat can also be transferred from a high temperature zone to a low temperature zone by convection. The heat transferred from the heat conductive sheet 71 is dispersed to the outside of the housing 200 by using exchange heat dissipation and convection heat dissipation in combination, further improving the heat dissipation effect of the heat dissipation module, so as to increase the service life of the display device 1000.

[0092] In some embodiments, see Fig.13 , the heat conducting sheet 71 is a copper sheet. Copper has a relatively high thermal conductivity of 401 (W / mk), has good heat dissipation, and is a relatively good thermal conductive material. The specific heat of copper is 0.385 J / g K, which is about half of that of aluminum. Therefore, when the heat conducting sheet 71 is a copper sheet, the temperature drops quickly and the heat dissipation is more efficient.

[0093] In some embodiments, see Fig.13The heat sink 72 is an aluminum extruded heat sink, that is, the material of the heat sink 72 is aluminum. Using heat capacity instead of specific heat, the density of copper (8.9) is more than three times higher than the density of aluminum (2.7), so the specific heat should be multiplied by the density to calculate the heat capacity. The result after multiplication is: the heat capacity of copper is 3.43 J / Gv; the heat capacity of aluminum is 2.42 J / Gv. That is to say, under the same volume, aluminum is easier to cool down.

[0094] Copper conducts heat three times faster than aluminum, but aluminum has a 1.5 times higher cooling efficiency than copper in the same volume. Therefore, the material of the heat conducting sheet 71 is copper, which is close to the display module 10. The copper sheet has a large heat transfer rate and can efficiently transfer the heat of the display module 10 to the heat sink 72 to achieve rapid heat conduction; the material of the heat sink 72 is aluminum, and the contact area between the heat sink 72 and the air is large, which can quickly radiate the heat transferred to the heat sink 72 to the air for output, quickly take away the heat, and cool down faster.

[0095] In some embodiments, see Fig.10 and Fig.13 The heat dissipation assembly 300 further includes at least one (e.g., one, or more) connector 80. The heat dissipation fins 70 are connected to the connector 80, and the connector 80 is connected to the housing 200. Exemplarily, the connector 80 is connected to the bottom cover 50 of the housing 200 by bolts to increase the connection strength between the heat dissipation module and the housing 200, and prevent the heat dissipation assembly 300 from being separated from the housing 200.

[0096] In some embodiments, see Fig.13, the heat dissipation module also includes a refrigerator 90. The refrigerator 90 can be a semiconductor refrigerator (TEC), which uses the Peltier effect of semiconductor materials to produce cooling. Among them, the Peltier effect refers to the phenomenon that when a direct current passes through a couple composed of two semiconductor materials, one end absorbs heat and the other end releases heat. Depending on the size of the current passing through, the heat-absorbing end can be reduced by 30°C to 40°C. Specifically, the refrigerator 90 includes a cooling surface 91 and a heating surface 92. The cooling surface 91 is closer to the display module 10 than the heating surface 92, and the heating surface 92 is connected to the heat dissipation fins 70. In other words, the refrigerator 90 and the heat dissipation fins 70 are arranged in sequence in the direction away from the display module 10. Exemplarily, the cooling surface 91 is connected to the display module 10, for example, through a thermal pad. The cooling surface 91 cools and absorbs the heat of the display module 10 to cool the display module 10. At this time, the heating surface 92 generates heat. The heating surface 92 contacts the heat sink 70 through the thermal pad. The heat is dispersed to the outside of the display device 1000 through the heat sink 70 to achieve a cooling effect. The thermal pad can be made of copper or aluminum that has its own deformation ability and good thermal conductivity, or it can be made of a flexible pad that has its own deformation ability and is doped with thermal grease, glass fiber, metal oxide particles, graphene or carbon nanotubes with good thermal conductivity. In some embodiments, continue to refer to Fig.13 The heat dissipation assembly 300 further includes a heat dissipation film 1001, the main function of which is heat dissipation and electromagnetic shielding. The heat dissipation film 1001 is disposed between the display module 10 and the heat dissipation fins 70. For example, see Fig.10 , a heat dissipation film 1001 (not shown in the figure) is attached to the side of the bottom cover 50 away from the display module 10. At this time, the heat dissipation film 1001 is located outside the housing 200. Fig.10 , the heat dissipation film 1001 (not shown in the figure) is attached to the side of the bottom cover 50 close to the display module 10. At this time, the heat dissipation film 1001 is located inside the housing 200. In the above two examples, the heat dissipation film 1001 can cover the first groove 52 and the heat dissipation port 51 of the bottom cover 50. For example, see Fig.13 The heat dissipation film 1001 is directly attached to the backlight surface of the display module 10 .

[0097] In some embodiments, see Fig.13 , the heat dissipation film 1001 covers the surface of the display module 10 away from the light emitting surface 101. That is to say, the heat dissipation film 1001 covers the backlight surface of the display module 10, so that the display module 10 can achieve uniform heat dissipation, avoid the situation of local overheating of the display module 10, and can also conduct heat to the outside of the display module 10 in time to achieve the effect of fast and uniform heat dissipation. In some embodiments, continue to see Fig.13The heat dissipation film 1001 includes a plurality of heat dissipation holes P penetrating the heat dissipation film 1001. The plurality of heat dissipation holes P allow airflow to flow more easily and provide better heat dissipation performance.

[0098] In some embodiments, see Fig.13 The heat dissipation film 1001 has an edge region and a middle region, and the edge region is located on at least one side (e.g., one side, or all around) of the middle region. The display module 10 includes a display area and a non-display area. The middle region may correspond to the display area of ​​the display module 10, and the edge region may correspond to the non-display area of ​​the display module 10. A plurality of heat dissipation holes P are located in the edge region of the heat dissipation film 1001, which can enhance the heat dissipation capacity of the edge region of the heat dissipation film 1001 and prevent the first receiving hole 15 from affecting the display area, thereby affecting the display effect of the display device 1000.

[0099] In some embodiments, the heat dissipation film 1001 includes at least one (e.g., one or more) graphene layer and at least one (e.g., one or more) copper foil layer stacked. The graphene layer and the copper foil layer can be stacked alternately. The main function of the graphene layer is to dissipate heat to prevent excessive temperature from damaging the display effect; the graphene itself has a thermal conductivity of 150W / (m·K)-1500W / (m·K) in the plane, which is equivalent to the thermal conductivity of metal. It is also a flexible material and can be deformed, which is conducive to better attachment to the backlight surface of the display module 10. The main function of the copper foil layer is electromagnetic shielding and heat dissipation. Since copper foil has excellent electrical conductivity and heat dissipation, using copper foil as a heat dissipation layer can make the heat dissipation film 1001 have excellent electrical conductivity and heat dissipation. The graphene layer and the copper foil layer form a composite film material with high thermal conductivity and high thermal radiation efficiency, which has low cost and can cool the entire display device by 6 to 15°C. The material of the heat dissipation film 1001 may also be other materials, such as a graphite sheet, and may be specifically configured according to actual needs.

[0100] In some examples, the material of the heat dissipation film 1001 may also include mesh glue, foam, graphite sheet, copper foil, etc., and each layer is attached together with conductive glue. Among them, the main function of the mesh glue is to avoid bubbles when attaching the heat dissipation film 1001 and the display module 10 together; the foam is mainly used to absorb impact, so that the display module 10 can reduce damage when it is hit.

[0101] In some embodiments, see Fig.13, along the direction away from the display module 10, the heat dissipation film 1001, the refrigerator 90 and the heat dissipation fins 70 are stacked in sequence. Exemplarily, the heat dissipation film 1001 is connected to the backlight surface of the display module 10, and the cooling surface 91 of the refrigerator 90 is connected to the heat dissipation film 1001. The cooling surface of the refrigerator can be coated with thermal conductive silicone grease and attached to the heat dissipation film 1001 to further reduce the heat of the display module 10. The heating surface 92 of the refrigerator 90 is connected to the thermal conductive sheet 71, and the thermal conductive sheet 71 is connected to the heat dissipation sheet 72. The heat generated by the display module 10 is conducted to the outside of the housing 200 through the heat dissipation film 1001, the refrigerator 90 and the heat dissipation fins 70 to achieve the purpose of cooling.

[0102] In some embodiments, see Fig.13 , the heat dissipation component 300 also includes a fan 301. The fan 301 is arranged on a side of the display module 10 away from the light emitting surface 101. When the temperature of the display module 10 is too high, the fan 301 can be started to accelerate air convection and improve the heat dissipation speed. Exemplarily, the fan 301 is arranged on a side of the heat dissipation module away from the display module 10. The heat generated by the display module 10 is dissipated by the heat dissipation module, and then the heat is conducted to the outside of the housing 200 through the fan 301. Also exemplarily, the fan 301 and the heat dissipation module are arranged in parallel, and the heat dissipation module and the fan 301 are basically arranged in the same plane instead of a layered stacking design. This design can minimize the thickness of the display device 1000.

[0103] In some examples, the fan 301 is connected to the heat dissipation module, for example, the fan 301 is connected to the first connector 80 of the heat dissipation module. In some other examples, the fan 301 is connected to the housing 200, and the connection method can refer to the connection between the heat dissipation fins 70 and the housing 200, which will not be repeated here. The fan 301 can be configured to automatically adjust the cooling power and fan speed according to the ambient temperature to improve the heat dissipation efficiency.

[0104] The fan 301 can be an axial flow fan, and the airflow direction is in the same direction as the axis of the fan blade, which can further improve the heat dissipation efficiency. It is understandable that the fan 301 can also be another device that can promote airflow movement.

[0105] In some embodiments, see Fig.11 The display device further includes a controller 400, which is connected to the optical component and the heat dissipation component. The controller 400 can be configured to control the image display of the display module 10 (e.g., turn on the image display, change the image, etc.), and can also be configured to control the heat dissipation of the heat dissipation component. In some examples, the material of the light guide plate of the display module 10 can also be a high temperature resistant material, such as polycarbonate (PC), and the light guide plate is formed by an injection molding process.

[0106] In some examples, since the display device is provided with a heat dissipation component, the material of the light guide plate of the display module 10 can be a material that is not resistant to high temperatures, such as polymethyl methacrylate (PMMA). The material that is not resistant to high temperatures can be hot-pressed to form a light guide plate, and there is no need to use an injection molding process that requires high temperatures, which can reduce the mold opening costs for injection molding and reduce costs.

[0107] The above is only a specific embodiment of the present disclosure, but the protection scope of the present disclosure is not limited thereto. Any changes or substitutions that can be thought of by any person skilled in the art within the technical scope disclosed in the present disclosure should be included in the protection scope of the present disclosure. Therefore, the protection scope of the present disclosure should be based on the protection scope of the claims.

Claims

1. A display device, characterized in that: include: The optical component comprises a display module and a reflector group, wherein the display module has a light-emitting surface, the reflector group comprises a first lens and a second lens, the first lens has a first reflective surface, and the second lens has a second reflective surface; the light emitted from the light-emitting surface passes through the first reflective surface and the second reflective surface in sequence and then is emitted out of the housing; A housing, used for fixing the optical component; The heat dissipation component is connected to the housing; the heat dissipation component is located on a side of the display module away from the light emitting surface.

2. The display device according to claim 1, characterized in that The heat dissipation component comprises: The heat dissipation fins are connected to the shell.

3. The display device according to claim 2, characterized in that: The heat dissipation fins include a heat conductive sheet and a heat sink, and the heat conductive sheet and the heat sink are sequentially arranged in a direction away from the display module.

4. The display device according to claim 3, characterized in that: The heat conducting sheet is a copper sheet, and / or the heat sink is an aluminum extruded heat sink.

5. The display device according to claim 2, characterized in that: The heat dissipation component also includes: At least one connecting member; the heat dissipation fins are connected to the housing through the connecting member.

6. The display device according to any one of claims 2 to 5, characterized in that: The heat dissipation component also includes: The refrigerator comprises a cooling surface and a heating surface, wherein the cooling surface is closer to the display module than the heating surface; and the heating surface is connected to the heat dissipation fins.

7. The display device according to any one of claims 2 to 5, characterized in that: The heat dissipation component also includes: The heat dissipation film is arranged between the display module and the heat dissipation fins.

8. The display device according to claim 7, characterized in that: The heat dissipation film covers a surface of the display module away from the light emitting surface.

9. The display device according to claim 7, characterized in that: The heat dissipation film includes a plurality of heat dissipation holes penetrating the heat dissipation film.

10. The display device according to claim 9, characterized in that: The heat dissipation film has an edge region and a middle region, wherein the edge region is located at at least one side of the middle region; and the plurality of heat dissipation holes are arranged in the edge region of the heat dissipation film.

11. The display device according to claim 7, characterized in that: The heat dissipation film comprises at least one graphene layer and at least one copper foil layer which are stacked.

12. The display device according to any one of claims 2 to 5, characterized in that: The heat dissipation component also includes: The fan is arranged on a side of the display module away from the light emitting surface.

13. The display device according to claim 1, characterized in that: The display module is detachably disposed in the housing; The shell includes: a main shell and a bottom cover, the bottom cover is opposite to the side of the display module away from the light-emitting surface, and the bottom cover is detachably connected to the main shell; the bottom cover is provided with a heat dissipation port, and the side of the bottom cover away from the display module is connected to the heat dissipation component.

14. The display device according to claim 13, characterized in that: A first groove is provided on one side of the bottom cover close to the display module, and the heat dissipation port runs through the bottom of the first groove; the display module is placed in the first groove.

15. The display device according to claim 1, characterized in that: The optical assembly further comprises: A plano-convex lens is arranged between the light-emitting surface of the display module and the first reflective surface of the first lens; the plano-convex lens includes a light-entering plane and a light-emitting convex surface, the light-entering plane is closer to the display module than the light-emitting convex surface; the light-entering plane is parallel to the light-emitting surface of the display module, and the light-emitting convex surface protrudes in a direction away from the display module; the plano-convex lens is provided with an anti-reflection film.

16. The display device according to claim 1, characterized in that: The display brightness of the display module is 2000cd / m 2 ~3000cd / m 2 , and / or, the resolution of the display module is greater than or equal to 1080p.

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