Display device

Abstract

The application discloses a display device, which comprises a back plate, a mounting frame and a diffusion plate, wherein the back plate is provided with a light emitting part; the mounting frame is arranged on the back plate, and one side of the mounting frame close to the center of the back plate is provided with a mounting inclined surface which extends obliquely relative to the back plate; the diffusion plate is arranged in the mounting frame and spaced from the back plate, and the edge of the diffusion plate is provided with a matching inclined surface, wherein the matching inclined surface has the same oblique angle as the mounting inclined surface, and the diffusion plate and the mounting frame are engaged through the mounting inclined surface and the matching inclined surface. According to the display device, the mounting inclined surface is arranged on the mounting frame, and the matching inclined surface is arranged on the edge of the diffusion plate, the oblique angle of the matching inclined surface is the same as that of the mounting inclined surface, the light can be emitted from the edge of the diffusion plate, the brightness of the edge of the display device during light emission can be improved, the size of the edge frame of the display device can be reduced, and the use experience of the user can be improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of display, in particular to a display device. BACKGROUND

[0002] In the related art, the existing liquid crystal splicing screen module is prone to produce a dark frame at the edge when emitting light, resulting in poor visual effect after multiple modules are spliced together, affecting the user experience, and there is room for improvement. SUMMARY

[0003] The present application aims to at least solve one of the technical problems existing in the prior art. To this end, one object of the present application is to provide a display device with a narrower edge dark frame, which can improve the user experience.

[0004] The display device according to an embodiment of the present application comprises: a back plate, wherein a light emitting piece is arranged on the back plate; a mounting frame, wherein the mounting frame is arranged on the back plate, and one side of the mounting frame close to the center of the back plate has a mounting inclined surface, and the mounting inclined surface extends obliquely relative to the back plate; and a diffusion plate, wherein the diffusion plate is arranged in the mounting frame and spaced apart from the back plate, and the edge of the diffusion plate has a matching inclined surface, wherein the matching inclined surface has the same inclination angle as the mounting inclined surface, and the diffusion plate and the mounting frame are lapped and matched through the mounting inclined surface and the matching inclined surface.

[0005] The display device according to an embodiment of the present application, by arranging the mounting inclined surface on the mounting frame and arranging the matching inclined surface on the edge of the diffusion plate, and the matching inclined surface has the same inclination angle as the mounting inclined surface, so that the diffusion plate and the mounting frame are lapped and matched, thereby eliminating the need for double-sided adhesive tape for fixation, which can reduce the material and labor assembly costs; and since the lapped surface is inclined to the plane of the back plate, the lapped position will not block the transmission of light, which is conducive to the light emitted by the light emitting piece to pass through the edge of the diffusion plate, which can improve the brightness of the edge of the display device when emitting light, thereby reducing the size of the edge dark frame of the display device, and when multiple display devices are spliced together, the visual effect can be improved, and the user experience is improved.

[0006] According to some embodiments of the present application, the inclination angle of the mounting inclined surface is α, and the included angle between the light corresponding to the maximum value of the received illuminance of the mounting inclined surface and the back plate is θ1, wherein α = θ1 / 2 + 45°.

[0007] According to some embodiments of the present application, the display device further comprises an optical film, which is arranged on the side of the diffusion plate away from the back plate and spaced apart from the diffusion plate.

[0008] In some examples, a distance between the optical film and the diffusion plate is z, z=(ε*x*ΔT / 2)*tanα, where ε is an expansion coefficient of the diffusion plate, x is a long side dimension of the diffusion plate, ΔT is a temperature change value of the diffusion plate, and α is an inclination angle of the installation inclined surface.

[0009] In some examples, a slot is defined on the installation frame and extends in a direction perpendicular to the back plate, and a periphery of the optical film has a connecting piece adapted to be inserted into the slot and movable relative to the slot in an extending direction of the slot.

[0010] In some examples, the slot is formed on an outer side wall of the installation frame, and an outer side of the installation frame is provided with a limiting boss, and the connecting piece has a limiting opening, and the limiting boss is adapted to be inserted into the limiting opening, and a size of the limiting opening is greater than a size of the limiting boss.

[0011] According to some embodiments of the present application, the display device further comprises a support column arranged between the back plate and the diffusion plate, wherein one end of the support column is connected to the back plate by an elastic piece, and the other end of the support column abuts against the diffusion plate.

[0012] In some examples, one of the support column and the back plate has a guide column, and the other of the support column and the back plate has a guide slot, the guide column and the guide slot are inserted and matched, the elastic piece forms a spring, and the spring is sleeved outside the guide column, and two ends of the spring are fixedly connected to the support column and the back plate respectively.

[0013] According to some embodiments of the present application, an edge of the diffusion plate is provided with a printed dot.

[0014] In some examples, the display device further comprises an outer frame defining an installation cavity, the back plate, the installation frame and the diffusion plate are located in the installation cavity; and a display screen is arranged in the outer frame, and the display screen is located on a side of the diffusion plate away from the back plate.

[0015] Additional aspects and advantages of the present application will be in part apparent and in part pointed out hereinafter. BRIEF DESCRIPTION OF DRAWINGS

[0016] The above and / or additional aspects and advantages of the present application will become apparent and be readily appreciated from the following description, including the appended drawings.

[0017] Figure 1 is a partial sectional view of a display device according to some embodiments of the present application;

[0018] Figure 2 is a partial sectional view of a display device according to some embodiments of the present application;

[0019] Figure 3 is Figure 2 is an enlarged view of structure A in FIG. 4;

[0020] Figure 4 is an assembly view of a mounting frame and an optical film according to some embodiments of the present application;

[0021] Figure 5 is a schematic view of a dot light path of a diffusion plate according to some embodiments of the present application;

[0022] Figure 6 is a schematic view of a partial structure of a diffusion plate according to some embodiments of the present application;

[0023] Figure 7 is a light distribution curve of a light emitting piece according to some embodiments of the present application;

[0024] Figure 8 is a simulation result of an edge brightness curve of a prior art solution;

[0025] Figure 9 is a simulation result of an edge brightness curve of a solution of the present application;

[0026] Figure 10 is a comparison view of edge brightness curves of a prior art solution and a solution of the present application;

[0027] Figure 11 is a display view of light emission of a light emitting surface of a product of a prior art solution;

[0028] Figure 12 is a display view of light emission of a light emitting surface of a product of a solution of the present application.

[0029] Reference signs:

[0030] a display device 100,

[0031] a back plate 10, a guide column 101,

[0032] a mounting frame 20, a mounting slope 201, a limiting boss 21, a slot 22,

[0033] a diffusion plate 30, a matching slope 301,

[0034] an optical film 40, a connecting piece 41, a limiting port 411,

[0035] a support column 50, a guide slot 501, an elastic piece 51,

[0036] an outer frame 61, a display screen 62. DETAILED DESCRIPTION

[0037] Embodiments of the present application are described below in detail with reference to the accompanying drawings, wherein the same or similar components are denoted by the same or similar reference numerals throughout the drawings. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application, and should not be understood as limiting the present application.

[0038] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only used to facilitate the description of the present application and simplify the description, and do not 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 limiting the present application. In addition, the features defined as "first", "second" can be explicitly or implicitly included one or more of the features. In the description of the present application, unless otherwise specified and limited, the term "a plurality of" means two or more.

[0039] In the description of the present application, it should be noted that, unless otherwise specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0040] Reference is made below Figures 1-12 A display device 100 according to an embodiment of the present application is described.

[0041] As Figures 1-12 As shown in the drawings, the display device 100 according to an embodiment of the present application comprises a back plate 10, a mounting frame 20 and a diffusion plate 30; the back plate 10 is provided with a light emitting member, the mounting frame 20 is arranged on the back plate 10; the diffusion plate 30 is mounted in the mounting frame 20, and the diffusion plate 30 is arranged spaced apart from the back plate 10, so as to reserve sufficient light mixing space for the light emitting member to uniformly mix light; one side of the mounting frame 20 close to the center of the back plate 10 (for example, the left side of the mounting frame 20 in the drawings) is provided with a plurality of mounting holes 21, and the other side of the mounting frame 20 away from the center of the back plate 10 (for example, the right side of the mounting frame 20 in the drawings) is provided with a plurality of mounting holes 22. Figure 1The inner side (shown) has a mounting slope 201, and the edge of the diffuser plate 30 has a mating slope 301. The mounting slope 201 extends obliquely relative to the back plate 10. For example, the mounting slope 201 extends obliquely upward in the direction from the inside to the outside. The mating slope 301 and the mounting slope 201 have the same inclination angle, so that the mating slope 301 and the mounting slope 201 can overlap together to achieve the overlapping fit between the diffuser plate 30 and the mounting frame 20.

[0042] According to an embodiment of the present invention, the display device 100, by providing a mounting slope 201 on the mounting frame 20 and a mating slope 301 on the edge of the diffuser plate 30, with the inclination angle of the mating slope 301 being the same as that of the mounting slope 201, allows the diffuser plate 30 to overlap with the mounting frame 20, thereby eliminating the need for double-sided adhesive for fixation and reducing material and labor assembly costs. Furthermore, since the overlapping surface is inclined to the plane of the back plate 10, the overlapping position does not obstruct light transmission, which is beneficial for the light emitted by the light-emitting element to pass through the edge of the diffuser plate 30, thereby increasing the brightness of the edge of the display device 100 when emitting light, and thus reducing the size of the edge dark frame of the display device 100. When multiple display devices 100 are spliced ​​together, the visual effect can be improved, enhancing the user experience.

[0043] like Figures 1-3 As shown, according to some embodiments of the present invention, the tilt angle of the mounting ramp 201 is α, that is, as follows: Figure 3 The angle between the mounting ramp 201 and the horizontal plane shown is θ1, which is the angle between the ray corresponding to the maximum illuminance received by the mounting ramp 201 and the back plate 10. Figure 3 The angle between the incident light ray and the horizontal plane is shown; wherein, after the incident light ray hits the edge of the display device 100, it is reflected by the mounting slope 201 of the mounting frame 10, and the angle of the light ray is deflected, so that it can be emitted from the front of the display device 100, such as... Figure 3 As shown, θ2=90-θ1, θ3=(180-θ2) / 2, θ4=90-θ3, α=θ1+θ4, from which we can obtain α=θ1 / 2+45°. That is to say, by designing the tilt angle of the mounting slope 201 as described above, when the light emitted by the light source is incident on the edge area of ​​the diffuser plate 30, it can be ensured that the incident light is reflected by the overlapping surface between the diffuser plate 30 and the mounting frame 20, and the reflected light can be emitted vertically upwards. That is, the reflected light at the edge of the diffuser plate 30 can be emitted from the front of the display device 100, which can improve the brightness of the edge of the display device 100 when it emits light, making the brightness transition from the edge of the display device 100 to the middle area more natural, improving the edge image quality of the display device 100, and optimizing the visual effect after multiple display devices 100 are spliced ​​together.

[0044] In some examples, the display device 100 has multiple light-emitting elements, which are spaced apart on the side of the back panel 10 near the diffuser plate 30 (e.g., Figure 1 (as shown on the upper side), and each light-emitting element can emit light towards the edge of the diffuser plate 30, thereby using the illuminance calculation formula Ev=Iv*cos(θ) / r 2 And the formula for superimposing illuminance: Ev = Ev1 + Ev2 + ... + Ev n Combining these, θ1 can be calculated; specifically, Ev represents illuminance, that is, the luminous flux received per unit area of ​​the illuminated surface; Iv represents the luminous intensity of the light source; θ represents the half angle of the diverging beam emitted by the light source, which in this application can be represented by the angle between the normal of the mounting inclined plane 201 (illuminated surface) and the light emitted by the light source, and θ = θ1 / 2 + 45°; r represents the distance from the illuminated point to the light source.

[0045] It should be noted that the distance between the position of the light emitted by the multiple light-emitting elements at the edge of the diffuser plate 30 and the plane where the light-emitting elements are located is a constant value. Therefore, by obtaining the distance between each light-emitting element and the vertical plane where the mounting frame 20 is located, the corresponding r for each light-emitting element can be calculated according to the Pythagorean theorem. Furthermore, since the Iv and θ of a single light-emitting element can be obtained through measurement, the above values ​​can be substituted into the illuminance calculation formula Ev=Iv*cos(θ) / r 2 In this process, the illuminance of each light-emitting element can be calculated, namely Ev1, Ev2...Ev n Then, by summing the multiple illuminance values, the total illuminance Ev can be obtained, thus achieving the purpose of combining multiple light-emitting elements into a single light-emitting element for calculation. Then, according to the illuminance calculation formula Ev=Iv*cos(θ) / r 2 The value of θ is derived by deducing θ and the calculation of α is realized according to the above calculation formula α=θ=θ1 / 2+45°. The tilt angles of the mating inclined surface 301 and the mounting inclined surface 201 are both set to α, so that the reflected light at the edge of the diffuser plate 30 can be emitted from the front of the display device 100, which can improve the brightness of the edge of the display device 100 when it emits light, and make the brightness transition from the edge of the display device 100 to the middle area more natural.

[0046] like Figure 3 As shown, according to some embodiments of the present invention, the display device 100 further includes: an optical film 40, the optical film 40 being disposed on the side of the diffuser 30 opposite to the back plate 10 (e.g., Figure 1As shown in the upper side of the figure), and the optical film 40 is arranged spaced apart from the diffusion plate 30, which can reserve space for thermal expansion of the diffusion plate 30, specifically, the diffusion plate 30 can be expanded by heat to press the mounting frame 20, so that the force of the diffusion plate 30 acting on the mounting frame 20 is decomposed into a force upward along the mounting slope 201 and a pressure perpendicular to the mounting slope 201, the pressure and the mounting slope 201 form a counteracting force, so that the diffusion plate 30 can move upward by thermal expansion, or the diffusion plate 30 can move downward by cooling and shrinking, and further, by arranging the optical film 40 spaced apart from the diffusion plate 30, the probability of the diffusion plate 30 pressing the optical film 40 can be reduced, and the stability and reliability of the product are improved.

[0047] As shown in the upper side of the figure), and the optical film 40 is arranged spaced apart from the diffusion plate 30, which can reserve space for thermal expansion of the diffusion plate 30, specifically, the diffusion plate 30 can be expanded by heat to press the mounting frame 20, so that the force of the diffusion plate 30 acting on the mounting frame 20 is decomposed into a force upward along the mounting slope 201 and a pressure perpendicular to the mounting slope 201, the pressure and the mounting slope 201 form a counteracting force, so that the diffusion plate 30 can move upward by thermal expansion, or the diffusion plate 30 can move downward by cooling and shrinking, and further, by arranging the optical film 40 spaced apart from the diffusion plate 30, the probability of the diffusion plate 30 pressing the optical film 40 can be reduced, and the stability and reliability of the product are improved. Figure 3 Figure 3 As shown in the upper side of the figure), and the optical film 40 is arranged spaced apart from the diffusion plate 30, which can reserve space for thermal expansion of the diffusion plate 30, specifically, the diffusion plate 30 can be expanded by heat to press the mounting frame 20, so that the force of the diffusion plate 30 acting on the mounting frame 20 is decomposed into a force upward along the mounting slope 201 and a pressure perpendicular to the mounting slope 201, the pressure and the mounting slope 201 form a counteracting force, so that the diffusion plate 30 can move upward by thermal expansion, or the diffusion plate 30 can move downward by cooling and shrinking, and further, by arranging the optical film 40 spaced apart from the diffusion plate 30, the probability of the diffusion plate 30 pressing the optical film 40 can be reduced, and the stability and reliability of the product are improved.

[0048] By limiting the distance z between the optical film 40 and the diffusion plate 30 to (ε*x*ΔT / 2)*tanα, it is beneficial to reserve sufficient expansion space for thermal expansion of the diffusion plate 30, and reduce the probability of the optical film 40 being pressed and lifted.

[0049] In some examples, the diffusion plate 30 can diffuse the light emitted by the light emitting member, so that the light is uniformly emitted, and the uniformity of the luminance of the light emitting surface of the display device 100 can be improved, wherein the diffusion plate 30 can be made of a material such as polystyrene (PS) or polycarbonate (PC) that is easy to bend, and the probability of deformation and damage of the diffusion plate 30 can be reduced.

[0050] In some examples, the optical film 40 can include a diffusion film and a brightness enhancement film, wherein the diffusion film can have the effect of uniform light, and improve the uniformity of the light emitted by the light emitting surface of the display device 100, and the brightness enhancement film includes a prism film or a dichroic beam splitter film (DBEF), etc., which can converge light and improve the working brightness of the display device 100.

[0051] As shown in the upper side of the figure), and the optical film 40 is arranged spaced apart from the diffusion plate 30, which can reserve space for thermal expansion of the diffusion plate 30, specifically, the diffusion plate 30 can be expanded by heat to press the mounting frame 20, so that the force of the diffusion plate 30 acting on the mounting frame 20 is decomposed into a force upward along the mounting slope 201 and a pressure perpendicular to the mounting slope 201, the pressure and the mounting slope 201 form a counteracting force, so that the diffusion plate 30 can move upward by thermal expansion, or the diffusion plate 30 can move downward by cooling and shrinking, and further, by arranging the optical film 40 spaced apart from the diffusion plate 30, the probability of the diffusion plate 30 pressing the optical film 40 can be reduced, and the stability and reliability of the product are improved. Figure 4 Figure 1 As shown in the upper side of the figure), and the optical film 40 is arranged spaced apart from the diffusion plate 30, which can reserve space for thermal expansion of the diffusion plate 30, specifically, the diffusion plate 30 can be expanded by heat to press the mounting frame 20, so that the force of the diffusion plate 30 acting on the mounting frame 20 is decomposed into a force upward along the mounting slope 201 and a pressure perpendicular to the mounting slope 201, the pressure and the mounting slope 201 form a counteracting force, so that the diffusion plate 30 can move upward by thermal expansion, or the diffusion plate 30 can move downward by cooling and shrinking, and further, by arranging the optical film 40 spaced apart from the diffusion plate 30, the probability of the diffusion plate 30 pressing the optical film 40 can be reduced, and the stability and reliability of the product are improved.​​Figure 1 As shown in the vertical direction), relative to the slot 22, so that the optical film 40 can move in the vertical direction when the diffusion plate 30 is deformed, reducing the probability of damage to the optical film 40 due to extrusion, improving the stability and reliability of the product.

[0052] As shown in the vertical direction), relative to the slot 22, so that the optical film 40 can move in the vertical direction when the diffusion plate 30 is deformed, reducing the probability of damage to the optical film 40 due to extrusion, improving the stability and reliability of the product. Figure 4 As shown in the vertical direction), relative to the slot 22, so that the optical film 40 can move in the vertical direction when the diffusion plate 30 is deformed, reducing the probability of damage to the optical film 40 due to extrusion, improving the stability and reliability of the product.

[0053] As shown in the vertical direction), relative to the slot 22, so that the optical film 40 can move in the vertical direction when the diffusion plate 30 is deformed, reducing the probability of damage to the optical film 40 due to extrusion, improving the stability and reliability of the product. Figure 1 and Figure 2 As shown in the vertical direction), relative to the slot 22, so that the optical film 40 can move in the vertical direction when the diffusion plate 30 is deformed, reducing the probability of damage to the optical film 40 due to extrusion, improving the stability and reliability of the product. Figure 1 As shown in the vertical direction), relative to the slot 22, so that the optical film 40 can move in the vertical direction when the diffusion plate 30 is deformed, reducing the probability of damage to the optical film 40 due to extrusion, improving the stability and reliability of the product. Figure 1 As shown in the vertical direction), relative to the slot 22, so that the optical film 40 can move in the vertical direction when the diffusion plate 30 is deformed, reducing the probability of damage to the optical film 40 due to extrusion, improving the stability and reliability of the product.

[0054] As shown in the vertical direction), relative to the slot 22, so that the optical film 40 can move in the vertical direction when the diffusion plate 30 is deformed, reducing the probability of damage to the optical film 40 due to extrusion, improving the stability and reliability of the product. Figure 1 and Figure 2 As shown in the vertical direction), relative to the slot 22, so that the optical film 40 can move in the vertical direction when the diffusion plate 30 is deformed, reducing the probability of damage to the optical film 40 due to extrusion, improving the stability and reliability of the product. Figure 1 As shown in the vertical direction), relative to the slot 22, so that the optical film 40 can move in the vertical direction when the diffusion plate 30 is deformed, reducing the probability of damage to the optical film 40 due to extrusion, improving the stability and reliability of the product. Figure 1The elastic member 51 can form a spring, the spring is sleeved outside the guide column 101, and two ends of the spring are fixedly connected with the supporting column 50 and the back plate 10 respectively, which can improve the stability of the abutment between the supporting column 50 and the diffusion plate 30, and is beneficial to improve the stability of the diffusion plate 30 when moving up and down, and reduces the influence of temperature difference on product quality.

[0055] As shown in Figure 1 and Figure 2 In some examples, the supporting column 50 can form a conical structure with a sharp upper end and a wide lower end, which can improve the stability of the supporting column 50 when moving up and down, and the upper end of the supporting column 50 can be spherical transition processing, which can protect the diffusion plate 30 and reduce the probability of the supporting column 50 pressing the diffusion plate 30 to pierce the diffusion plate 30. The supporting column 50 can be made of white polycarbonate (PC) material, which is easy to injection molding, has good transparency, and has long service life.

[0056] The specific assembly process of the supporting column 50 is as follows: first, the spring is sleeved on the guide column 101, and then the supporting column 50 is sleeved on the guide column 101 to realize the normal installation of the supporting column 50, which is easy to maintain. Of course, the spring can also be integrally injection molded with the supporting column 50, that is, the upper end of the spring is injection molded in the supporting column 50, and then the supporting column 50 is directly sleeved on the guide column 101 to realize the installation of the supporting column 50, which is convenient to operate and can improve the stability of the overall structure.

[0057] As shown in Figure 5 and Figure 6 According to some embodiments of the present application, the edge of the diffusion plate 30 can be provided with a printing dot, so that the direction of light propagation can be scattered when the light is transmitted to the edge of the diffusion plate 30, so that more light is incident to the edge of the diffusion plate 30, and the edge quality of the display device 100 can be optimized.

[0058] It should be noted that, as shown in Figure 6 The setting of the printing dot needs to be analyzed and processed in combination with the overall picture. The specific scheme is as follows: according to the width of the dark area, the brightness difference of the dark area is analyzed by using an instrument, and a gray scale chart is generated according to the brightness data, and then the specific calculation and simulation of the overall light compensation design scheme is carried out through the gray scale chart, which can improve the use effect of the printing dot, and thus reduce the brightness loss and avoid the local dark band of the display device 100.

[0059] As shown in Figure 1 and Figure 2 In some examples, the display device 100 further comprises an outer frame 61 and a display screen 62, and the outer frame 61 is defined on one side (such as Figure 1The upper side) open mounting cavity, and the back plate 10, the mounting frame 20 and the diffusion plate 30 are all installed in the mounting cavity, by setting the outer frame 61, the light source can be fully utilized to reduce energy loss; the display screen 62 is arranged in the outer frame 61, and the display screen 62 is located on the side of the diffusion plate 30 away from the back plate 10 (such as Figure 1 The upper side) open mounting cavity, and the back plate 10, the mounting frame 20 and the diffusion plate 30 are all installed in the mounting cavity, by setting the outer frame 61, the light source can be fully utilized to reduce energy loss; the display screen 62 is arranged in the outer frame 61, and the display screen 62 is located on the side of the diffusion plate 30 away from the back plate 10 (such as

[0060] In some examples, the display screen 62 can be a liquid crystal screen which takes liquid crystal material as a basic component, that is, filling liquid crystal material between two substrates, driving by thin film transistor, and changing the arrangement of particles in the liquid crystal material by voltage to realize the display of different pictures.

[0061] As shown in Figure 1 In some examples, the two sides (such as Figure 1 As shown in the outer side) of the back plate 10 can extend upward and be fixedly connected with the outer frame 61 through fasteners, which can realize the fixation of the light emitting member and the optical film 40, and the display screen 62, and improve the stability of the display device 100 as a whole. The fastener can be a screw or a bolt, etc., which has good fastening effect.

[0062] As shown in Figure 2 In other examples, the outer side of the mounting frame 20 has a downwardly open groove, and the two sides (such as Figure 1 As shown in the outer side) of the back plate 10 can extend upward and be insertedly matched with the groove, which realizes the fixed connection of the back plate 10 and the mounting frame 20, and realizes the fixation of the light emitting member and the optical film 40, and the display screen 62, and improves the stability of the display device 100 as a whole.

[0063] In some examples, the back plate 10 can be made of SECC or SGCC, etc., which is beneficial to protect the electronic components inside the display device 100 from external interference or corrosion.

[0064] In some examples, the mounting frame 20 can be made of white PET and aluminum alloy, etc., which can improve the strength and toughness of the mounting frame 20, and can be used to protect the display device 100, and can improve the durability of the display device 100.

[0065] In some examples, the light emitting member can be a direct type LED light bar, and the light bar can be fixed on the back plate 10 through double-sided adhesive tape or screws to ensure its heat dissipation effect.

[0066] As shown in Figure 1 and Figure 2As shown, in some examples, a reflective film is arranged inside the display device 100, and the reflective film is arranged on the inner side of the mounting frame 20 and the back plate 10, and the reflective film has high reflectivity to re-reflect the light incident on the bottom of the display device 100 to the display screen 62, thereby reducing the brightness loss of the display device 100.

[0067] In the following, a specific embodiment according to the present application is described. Figures 2-12

[0068] The display device 100 comprises a back plate 10, a mounting frame 20 and a diffusion plate 30, the back plate 10 is provided with a light emitting piece, and the outer end of the back plate 10 has an upwardly extending boss, the mounting frame 20 is arranged on the back plate 10, and the outer end of the mounting frame 20 has a downwardly recessed groove, and the boss is inserted into the groove to realize the connection between the mounting frame 20 and the back plate 10.

[0069] The inner side of the mounting frame 20 has a mounting slope 201, and the inclination angle of the mounting slope 201 is α; the diffusion plate 30 is mounted in the mounting frame 20, and the outer side of the diffusion plate 30 has a matching slope 301, and the inclination angle of the matching slope 301 is the same as that of the mounting slope 201, so that the diffusion plate 30 and the mounting frame 20 are lap-jointed, and the light emitted by the light emitting piece can irradiate to the edge of the diffusion plate 30 and be emitted from directly above the diffusion plate 30.

[0070] The light emitting piece can be an LED lamp using a refractive lens, according to the light distribution curve of the LED as shown in Figure 7 The relative intensity refers to the ratio of the light intensity of the light emitting piece at a certain angle to the peak light intensity in the optical axis direction, so it can be known that the light emitting piece can reach the maximum light emitting intensity when the light emitting angle is ±75°, and the expansion coefficient ε of the diffusion plate 30 is 8×10 -5 / K.

[0071] The plurality of LED lamps can be arranged at non-equal intervals, and in the direction from the outside to the inside, the distance between adjacent two LED lamps can gradually increase until the plurality of LED lamps inside are arranged at equal intervals, specifically, the distance between the outermost LED lamp and the outer edge of the display device 100 is 40mm, the distance between the outermost LED lamp and the adjacent LED lamp is 64mm, and the distance between the plurality of LED lamps inside the outermost LED lamp is all 77mm, and the light mixing distance of the LED can be 31mm, that is, the distance between the surface of the back plate 10 and the upper surface of the display device 100 is 31mm, which is beneficial to fully mixing the light of the plurality of LED lamps, can improve the uniformity of the picture of the display device 100, can reduce the probability of forming bright and dark bands when the display device 100 emits light, and improves the user experience.

[0072] ​In the above embodiments, according to theoretical calculations and optical simulations, the tilt angle α of the mounting slope 201 is 60°, which can improve the luminous brightness of the edge of the display device 100, optimize the edge brightness curve of the display device 100, improve the visual effect after multiple display devices 100 are spliced ​​together, and improve the product grade; the long side dimension x of the diffuser plate 30 is equal to 1209.6mm, the highest temperature in the reliability process of the display device 100 is 60℃, compared with the normal temperature of 25℃, we can get ΔT is 35K. According to z=(ε*x*ΔT / 2)*tanα, we know that d=1.68mm, z=2.9064. Therefore, the gap between the optical film 40 and the diffuser plate 30 in this application can be designed to be 3mm, which can reduce the probability of the optical film 40 being squeezed and pushed up, and improve the stability and reliability of the product.

[0073] Figure 8 This is a simulation result of the edge brightness curve of the existing technology, combined with... Figure 8 As can be seen from the structural diagram of the existing product of a, the diffuser plate 30 is directly horizontally overlapped on the mounting frame 20; combined with Figure 8 As can be seen from the luminous diagram of the existing luminous surface of product b, its dark frame at the edge is relatively wide; combined with Figure 8 The curve showing the relationship between illuminance and distance from the edge for existing product c (this curve is...) Figure 8 As shown by the horizontal line (b), the curve is relatively steep between -100mm and -85mm, meaning that the difference between the illuminance at the edge of the luminous surface and the illuminance in the middle area of ​​the luminous surface is large, and the luminous surface of the product has a large dark frame.

[0074] Figure 9 This is a simulation result of the edge brightness curve of the technology in this application, combined with... Figure 9 As shown in the structural diagram of the product in this application, the diffuser plate 30 is inclined and overlaps the mounting frame 20; combined with Figure 9 As can be seen from the light-emitting schematic diagram of the light-emitting surface of the product in this application (b), the dark frame at its edge is relatively narrow; combined with Figure 9 c. A curve showing the relationship between the illuminance of the product of this application and the distance from the edge (this curve is...) Figure 9 As shown by the horizontal line (b), the curve is relatively flat between -95mm and -85mm, meaning that the difference between the illuminance at the edge of the luminous surface and the illuminance in the middle area of ​​the luminous surface is small, and the dark frame of the luminous surface of the product is narrow.

[0075] By comparing the edge brightness curves of the product samples in this application with existing products, the results are as follows: Figure 10As shown, the curve of the example of the present application starts to flatten at 8mm from the edge area, and the relative intensity (the ratio of the actual light intensity and the average light intensity) at the position 5mm from the edge area is greater than 0.95, and the energy loss value (i.e. the area value between the curve and the left ordinate) is only 1.13, while the curve of the existing product starts to flatten at 10mm from the edge area, and the relative intensity at the position 5mm from the edge area is only 0.86, and the energy loss is as high as 3.27, and by comparison, it can be seen that the display frame width of the display screen of the scheme of the present application is small, the rising speed of the curve is fast, the energy loss is small, and the edge frame problem is well solved.

[0076] Figure 11 is the actual picture display diagram of the light-emitting surface of the product of the prior art scheme, and as shown in the figure, the lower edge of the screen light-emitting surface has a relatively wide dark frame; Figure 12 is the actual picture display diagram of the light-emitting surface of the product of the present application scheme, and as shown in the figure, the dark frame of the lower edge of the screen light-emitting surface is extremely narrow, and even the dark frame is difficult to observe; thus, the technical scheme of the present application has obvious improvement compared with the prior art scheme, the brightness of the edge of the light-emitting surface of the display device 100 can be improved, the dark frame of the edge of the light-emitting surface is narrowed, the edge picture quality of the display device 100 is improved, and the visual effect after the plurality of display devices 100 are spliced together is improved.

[0077] Other configurations and operations of the display device 100 according to the embodiments of the present application are known to those skilled in the art, and will not be described in detail here. In the description of the present application, the "first feature", "second feature" can include one or more features. Among them, the up-down direction, the left-right direction and the front-rear direction are based on the up-down direction, the left-right direction and the front-rear direction shown in the figure.

[0078] In the description of the present application, unless otherwise explicitly specified and limited, the first feature is "above" or "below" the second feature, which can include that the first and second features are in direct contact, or the first and second features are not in direct contact but are in contact through another feature between them. Moreover, the first feature is "above", "above" and "above" the second feature, which includes that the first feature is directly above and obliquely above the second feature, or only means that the first feature is higher than the second feature in horizontal height.

[0079] In the description of the specification, reference to "one embodiment", "some embodiments", "an exemplary embodiment", "an example", "a specific example", or "some examples" means that a particular feature, structure, material, or characteristic being described is included in at least one embodiment or example of the application. The appearances of the phrases "in one embodiment", "in some embodiments", "in an exemplary embodiment", "an example", "a specific example", or "some examples" in various places in the specification are not necessarily referring to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics can be combined in any suitable manner in one or more embodiments or examples.

[0080] Although embodiments of the application have been shown and described, it will be appreciated that those skilled in the art can make various changes, modifications, substitutions and alterations thereto without departing from the principles and scope of the application, which are defined by the claims and their equivalents.

Claims

1. A display device, characterized in that, include: Back plate, wherein a light-emitting element is provided on the back plate; The mounting frame is disposed on the back plate, and the mounting frame has a mounting ramp on the side near the center of the back plate, the mounting ramp extending obliquely relative to the back plate. A diffuser plate is installed within the mounting frame and spaced apart from the back plate, and the edge of the diffuser plate has a mating bevel. Wherein, the inclination angle of the mating inclined surface is the same as that of the mounting inclined surface, and the diffuser plate and the mounting frame are mated and connected through the mounting inclined surface and the mating inclined surface; The inclination angle of the mounting slope is α, and the angle between the light ray corresponding to the maximum illuminance received by the mounting slope and the back plate is θ1, where α = θ1 / 2 + 45°. It also includes: an optical film, which is disposed on the side of the diffuser plate opposite to the back plate and spaced apart from the diffuser plate; The distance between the optical film and the diffuser plate is z. , Where ε is the expansion coefficient of the diffuser plate, x is the long side dimension of the diffuser plate, ΔT is the temperature change value of the diffuser plate, and α is the tilt angle of the mounting slope. The mounting frame defines a slot that extends in a direction perpendicular to the back plate. The outer periphery of the optical film has a connector that is adapted to be inserted into the slot and is movable relative to the slot in the extension direction of the slot. The slot is formed on the outer side wall of the mounting frame, and the outer side of the mounting frame is provided with a limiting boss. The connector has a limiting port, and the limiting boss is adapted to be inserted into the limiting port, and the size of the limiting port is larger than the size of the limiting boss. It also includes: a support column, which is disposed between the back plate and the diffuser plate, wherein one end of the support column is connected to the back plate by an elastic element, and the other end of the support column abuts against the diffuser plate.

2. The display device according to claim 1, characterized in that, One of the support column and the back plate has a guide column, and the other of the support column and the back plate has a guide groove. The guide column is inserted into the guide groove. The elastic element forms a spring. The spring is sleeved on the outside of the guide column, and the two ends of the spring are fixedly connected to the support column and the back plate, respectively.

3. The display device according to claim 1, characterized in that, The edge of the diffuser plate is provided with printed dots.

4. The display device according to any one of claims 1-3, characterized in that, Also includes: An outer frame defining a mounting cavity, wherein the back plate, the mounting frame, and the diffuser plate are located within the mounting cavity; The display screen is disposed within the outer frame and is located on the side of the diffuser plate opposite to the back plate.

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