CN209804170U - A LED display - Google Patents

Abstract

The present application discloses an LED display screen, which is characterized in that it includes a substrate and a light-shielding frame, and the LED light-emitting units distributed in an array are arranged on the substrate; A plurality of grids distributed in an array, a plurality of first fixing elements are arranged on a side of the grid adjacent to the substrate, and a second fixing element is arranged on the area of the substrate corresponding to the first fixing elements. The first fixing part is set on the side of the light-shielding frame facing the substrate, and the second fixing part is arranged on the area corresponding to the substrate and the first fixing part. By assembling the inner surface of the light-shielding frame with the substrate, the installation traces are further reduced, so that when viewed from the front When using the LED display, the appearance will not be affected by the traces of installation.

Description

A LED display

technical field

The present application relates to the technical field of LED display screens, in particular to an LED display screen.

Background technique

Colored LED lamp beads have the characteristics of high luminance, and the large screen composed of dot matrix can display high brightness (easily higher than 1000Nit), and at the same time, the display uniformity is high, and it has a better viewing effect than projection. The color LED display has other advantages, such as each LED lamp bead responds quickly, can also be individually controlled on/off, and can be completely turned off when displaying a black field to have a high contrast. The LED lamp bead has a narrow spectrum and maintains a wide color gamut at high brightness. LED large-screen display has gradually entered the field of high-quality video projection. As the technology continues to mature, the application scenarios will continue to expand.

Due to the high luminous intensity of the LED lamp beads in the existing large-size LED display, and the light crosstalk between the LED lamp beads, which seriously affects the display effect, the existing solution is to add a shading frame between the LED lamp beads to prevent Prevent pixel crosstalk between each lamp bead. At present, one way to fix the shading frame of the LED screen is to paste it on the PCB board with adhesive. This way is not convenient for later maintenance and disassembly. The other way is to fix it by screws, but using screws to fix it from the front will affect the consistency of the screen appearance. Therefore, there is an urgent need for a new type of LED screen installation method.

Utility model content

The application provides an LED display screen, which is used to solve the problems of poor installation and poor display effect of the LED display screen.

In order to solve the above technical problems, a technical solution adopted by this application is: an LED display screen, which is characterized in that it includes a substrate and a light-shielding frame, and the LED light-emitting units distributed in an array are arranged on the substrate; the light-shielding frame is arranged on The outgoing light path of the LED light-emitting unit includes a plurality of grids distributed in an array, and a plurality of first fixing parts are arranged on the side of the grid adjacent to the substrate, and the substrate and the first fixing parts The corresponding area is provided with a second fixing member.

In one embodiment, the first fixing member includes a fastener integrally formed with the shade frame, the second fixing member is a through hole corresponding to the fastener, and the fastener and the The through-holes of the substrates are assembled by interference.

In one embodiment, the fastener includes a first structure and a second structure, one end of the first structure is connected to the shade frame, and the second structure is stacked at the other end of the first structure.

In one embodiment, the first structure is one of a truncated cone, a cylinder or a cone, and the second structure is one of a truncated cone, a cone or a cylinder.

In one embodiment, the outer surface of the first structure is provided with an elastic body or a thread structure.

In one embodiment, the first fixing piece includes a plurality of integrally formed buckle pieces, the second fixing piece is a through hole corresponding to the buckle piece, and the buckle piece is connected to the through hole Assembled by snap fit.

In one embodiment, the first fixing member includes a plurality of first fixing holes, the second fixing member includes a plurality of second fixing holes, and the first fixing holes and the second fixing holes are tightened by screws. solid.

In one embodiment, the LED display screen further includes an optical film, and the optical film includes one of a diffusion film, a polarizing film or a protective film, and the optical film is fixed on the The light-emitting surface of the shading frame.

In one embodiment, the light shielding frame further includes a positioning column, and the positioning column is used for positioning and assembling with the base plate.

In one embodiment, the shade frame includes a first grid and a second grid, and the first fixing member is disposed at an intersection area of the first grid and the second grid.

The beneficial effects of the present application are: the first fixing part is arranged on the side of the light-shielding frame facing the substrate, the second fixing part is arranged on the area corresponding to the substrate and the first fixing part, and the inner surface of the light-shielding frame is assembled with the substrate to further reduce The installation traces make the appearance of the LED display screen not affected by the installation traces when viewing the LED display from the front.

Description of drawings

Fig. 1 is the structural representation of an embodiment of the LED display screen of the present application;

Fig. 2 is a structural schematic diagram of a light-shielding frame and a fixing member of an embodiment of the LED display screen of the present application;

Fig. 3 is a partially enlarged schematic diagram of area III in Fig. 2;

Fig. 4 is a partially enlarged schematic diagram of area IV in Fig. 3;

Fig. 5 is a schematic diagram of the assembly process of the fixture of an embodiment of the LED display screen of the present application;

Fig. 6 is a schematic structural view of a fixture of an embodiment of the LED display screen of the present application;

Fig. 7 is another schematic structural view of the fixing part of an embodiment of the LED display screen of the present application;

Fig. 8 is another structural schematic diagram of the fixing part of an embodiment of the LED display screen of the present application;

Fig. 9 is another structural schematic diagram of a fixing part of an embodiment of the LED display screen of the present application;

Fig. 10 is another structural schematic diagram of the fixing part of an embodiment of the LED display screen of the present application;

Fig. 11 is a structural schematic diagram of a light-shielding frame and a buckle of an embodiment of the LED display screen of the present application;

Fig. 12 is a schematic diagram of the assembly process of the buckle of an embodiment of the LED display screen of the present application;

Fig. 13 is a schematic structural view of another embodiment of the LED display screen of the present application;

Fig. 14 is a structural schematic diagram of a light-shielding frame and fixing holes of an embodiment of the LED display screen of the present application;

Fig. 15 is a partially enlarged schematic diagram of area XV in Fig. 14;

Fig. 16 is a schematic diagram of the fixing holes and screw assembly structure of an embodiment of the LED display screen of the present application.

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the present application with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of them. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of this application.

The terms "first" and "second" in this application are only used for descriptive purposes, and should not be understood as indicating or implying relative importance or implicitly specifying the quantity of indicated technical features. Thus, the features defined as "first" and "second" may explicitly or implicitly include at least one of these features. In the description of the present application, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined. All directional indications (such as up, down, left, right, front, back...) in the embodiments of the present application are only used to explain the relative positional relationship between the various elements in a certain posture (as shown in the drawings) , sports conditions, etc., if the specific posture changes, the directional indication also changes accordingly. Furthermore, the terms "include" and "have", as well as any variations thereof, are intended to cover a non-exclusive inclusion. For example, a process, method, system, product or device comprising a series of steps or elements is not limited to the listed steps or elements, but optionally also includes unlisted steps or elements, or optionally also includes Other steps or elements inherent to the process, method, product or apparatus are included.

In the description of this application, it should be noted that, unless otherwise clearly stipulated and limited, the terms "installation", "connection", "connection", and "set on..." should be understood in a broad sense, for example, it can be A fixed connection can also be a detachable connection or an integral connection; it can be a mechanical connection; it can be a direct connection or an indirect connection through an intermediary, and it can be an internal communication between two elements. Those of ordinary skill in the art can understand the specific meanings of the above terms in this application depending on the specific circumstances.

Referring to FIG. 1, FIG. 1 is a schematic structural diagram of an embodiment of the LED display screen of the present application. The LED display screen 100 includes: a substrate 30 , a light-shielding frame 10 and an optical film 20 .

The substrate 30 is provided with an array of LED light-emitting units, the optical film 20 is fixed on one surface of the light-shielding frame 10, and the light-shielding frame 10 is arranged on the outgoing light path of the LED light-emitting units. The light-shielding frame 10 includes a plurality of grids 11 distributed in an array To accommodate the corresponding LED lighting unit. That is to say, the light-shielding frame 10 is located between the substrate 30 and the optical film 20, and the LED light-emitting units distributed in arrays on the substrate 30 are accommodated in the grids 11 of the light-shielding frame 10, so that each grid 11 accommodates LED light-emitting units so that Form a pixel of the LED display. A plurality of first fixing members are provided on the side adjacent to the grid 11 and the base plate 30 , and the first fixing members may be fasteners or buckles or fixing holes. The area of the substrate 30 corresponding to the first fixing member is provided with a second fixing member, and the second fixing member may be a through fixing hole or a fastener or the like. The first fixing member cooperates with the second fixing member to fix the shade frame 10 and the base plate 30 . The substrate 30 can be a metal plate or a PCB (Printed Circuit Board, printed circuit board), etc., and the LED light-emitting unit can be arranged on the substrate 30 by surface mounting or COB (Chips on Board, chip on board) packaging. The plurality of grids 11 distributed in the array of the light-shielding frame 10 are used to accommodate the LED light-emitting units, so that the LED light-emitting units distributed in the array can be separated, and optical crosstalk between the LED light-emitting units can be prevented. The material of the light-shielding frame 10 may be one or more of plastic, plastic, metal or metal alloy. The shape of the light-shielding frame 10 can be rectangular, square or circular, etc., which can be set according to actual conditions, and is not limited here. The optical film 20 may be one of a diffusion film, a polarizing film or a protective film, and the fixing method of the optical film 20 may be bonding, clipping or using a clamping piece, etc., which is not limited here.

The optical film 20 is fixed on one surface of the light-shielding frame 10 , and the other surface of the light-shielding frame 10 is fixed on the substrate 30 to separate the LED light-emitting units distributed in arrays. Therefore, the optical crosstalk between the LED light-emitting units on the substrate 30 can be reduced, and the display effect of the LED display screen 100 can be improved through the optical film 20 . Moreover, the way of assembling the inner surface of the light-shielding frame 10 with the substrate 30 further reduces the installation marks of the assembly, so that when viewing the LED display screen 100 from the front, the appearance will not be affected by the installation marks.

Optionally, referring to FIG. 2 , the thickness of the shade frame 10 is 0.1-10 mm. It can be understood that when the substrate 30 , the light-shielding frame 10 and the optical film 20 are fixed, the distance between the optical film 20 and the substrate 30 is the thickness of the light-shielding frame 10 , thereby leaving a space for accommodating the LED lighting unit. Prevent the optical film 20 from being pressed against the LED light-emitting unit and cause the LED light-emitting unit to be damaged.

Referring to FIG. 3 , the shade frame 10 may include a first grill 12 and a second grill 13 . The first grid 12 and the second grid 13 are interlaced to form a plurality of grids 11 distributed in an array on the shade frame 10 . Wherein, the space of each grid 11 can accommodate one, two or three LED light emitting units, so that each space corresponds to one pixel of the LED display screen 100 . The shape and quantity of the grids 11 are not limited here, for example, they may be seamlessly spliced quadrilaterals or seamlessly spliced hexagons, etc., and the number may be 64, 81, or 255. The first grid 12 and the second grid 13 of the shade frame 10 have the same thickness. That is, the width W1 of the first grid 12 and the width W2 of the second grid 13 are equal, and the thickness value may be 0.2-5 mm.

Optionally, referring to FIG. 4 and FIG. 5 , the first fixing member may include a fastener 40 integrally formed with the shade frame 10 , the second fixing member is a through hole corresponding to the fastener 40 , and the fastener 40 is connected to the base plate The through holes of 30 are assembled by interference. The fastener 40 may be a polyhedron (such as a cuboid, etc.) or a body of rotation (such as a circular truncated cone or a cone, etc.) composed of elastic materials such as plastic or plastic. The number of fasteners 40 may be 4, 5 or 9, etc. A plurality of fasteners 40 may be evenly distributed at the center, four corners and four sides of the light shielding frame 10 and toward one side of the base plate 30 . Specifically, the fastener 40 can be arranged on the first grid 12 or the second grid 13 or at the intersection of the first grid 12 and the second grid 13 , preferably at the intersection.

Continuing to refer to FIG. 4 , the fastener 40 may include a first structure 41 and a second structure 42 , one end of the first structure 41 is connected to the shade frame 10 , and the second structure 42 is stacked on the other end of the first structure 41 . Optionally, the first structure 41 is one of a truncated cone, a cylinder or a cone, and the second structure 42 is one of a truncated cone, a cone or a cylinder. For example, the fastener 40 may be integrally formed and the first structure 41 located at the junction of the first grid 12 and the second grid 13 is a combined structure of a cylinder and the second structure 42 is a circular frustum. Wherein the height h1 of the cylinder may be 0.1-3 mm. The diameter D1 of the cylinder may be 0.2-5 mm. The diameter of the cylinder may be larger than the width W1 of the first grid 12 or the width W2 of the second grid 13 . The height h2 of the truncated circle may be less than or equal to the height h1 of the cylinder, and the diameter D2 of the truncated circle may be smaller than the diameter D1 of the cylinder. As shown in (a) and (b) in FIG. 5 , the second fixing member in the corresponding area on the substrate 30 can be a through hole, the diameter of the through hole can be D3, and the diameter D2 of the second structure 42 is a truncated cone smaller than the through hole. The diameter D3 of the hole is convenient for guiding the fastener 40 to be inserted into the through hole. Since the tolerance zone of the cylinder of the first structure 41 is larger than the tolerance zone of the through hole, and the fastener 40 is usually made of elastic materials such as plastic and plastic, the fastener 40 can be pressed into the through hole of the substrate 30 with a little force during installation. In the hole, the elastic deformation of the fastener 40 will increase the friction between it and the base plate 30 , so that the light-shielding frame 10 can be fixed on the base plate 30 . The fastener 40 can be completely inserted into the through hole of the base plate 30 , thereby preventing the fastener 40 from affecting the shading effect of the shading frame 10 . In other embodiments, the second fixing member provided on the substrate 30 is an integrated fastener 40 , and the first fixing member provided on the shade frame 10 is a fixing hole, and the two are fixed by interference fit.

In some embodiments, referring to FIG. 6 , the fastener 40 can be a combination of a cylinder 41a and a cone 42a. The height and diameter of the cylinder 41a and the cone 42a can be similar to those of the previous embodiments, and will not be repeated here. Since the cone 42 a is provided on the cylinder 41 a, it is beneficial for the fastener 40 to pass through the through hole of the base plate 30 , thereby improving the assembly efficiency of the light-shielding frame 10 and the base plate 30 . Referring to Fig. 7, fastener 40 can be the step body that structure 41b and structure 42b are combined, and structure 41b and structure 42b can all be polyhedron (such as cuboid) or rotating body (such as cylinder), and the height of structure 41b and structure 42b Similar to the previous embodiments, the radial width of structure 41b is greater than the radial width of structure 42b.

Optionally, the outer surface of the first structure 41 may be provided with an elastic body or a screw structure. Referring to FIG. 8 , the outer surface of the first structure 41c of the fastener 40 can be provided with a raised elastic body 43 to further increase the frictional force. The elastic body 43 can be made of the same material as the fastener 40 , for example, it can be rubber or elastic plastic. The fastener 40 can be a combination of a cylinder 41c and a round platform 42c. The difference from the previous embodiment is that in this embodiment, the outer surface of the cylinder 41c is provided with a protruding elastic body 43 so that when the cylinder 41c fits into the hole During fixing, the elastic body 43 further enhances the frictional force between the fastener 40 and the inner wall of the hole of the base plate 30 , so that the assembly and fixing between the light shielding frame 10 and the base plate 30 is more firm. Referring to FIG. 9 , the fastener 40 can be an integral circular platform 41d. That is to say, the second structure 42 is removed and the first structure 41 is directly integrated. At this time, the height of the circular platform 41d is the sum of the heights of the cylinder 41 and the circular platform 42 in the previous embodiment. And a protruding elastic body 43 is provided on the outer surface of the end of the round platform 42 in the circumferential direction. When the round platform 41d is fixed with the through hole of the base plate 30, the elastic body 43 can further enhance the frictional force between the first fixing part and the inner wall of the through hole of the base plate 30, reduce the risk of the light shielding frame 10 falling off from the base plate 30, and save Removing the cylindrical part makes the manufacturing of the fastener 40 easier and saves the manufacturing cost. Of course, the fastener 40 can also be a separate cylindrical structure (not shown), at this time the height of the cylinder is the sum of the heights of the cylinder 41 and the round platform 42 in the previous embodiment, and it is circumferentially arranged on the outer surface of the end of the cylinder Raised elastic body (not shown) to enhance the frictional force when it is fixed.

Optionally, referring to FIG. 10 , the fastener 40 may be a combination of a cylinder 41e and a circular platform 42e. In this embodiment, grooves may be provided on the outer surface of the cylinder 41c to form a thread structure. Corresponding threaded holes may be provided on the base plate 30 . It can be understood that the fastener 40 and the base plate 30 are fixed through thread matching, so that the fixing of the fastener 40 and the base plate 30 is more firm.

In some embodiments, referring to FIG. 11 , the first fixing part of the shade frame 10 may include an integrally formed buckle 50 , and the buckle 50 may be made of elastic materials such as plastic or plastic. The second fixing part is a through hole corresponding to the buckle part 50 , and the buckle part 50 and the through hole are assembled by snap fit to fix the light shielding frame 10 and the base plate 30 . A plurality of locking members 50 can be evenly distributed at the center, four corners and four sides of the light shielding frame 10 and facing one side of the base plate 30 . Specifically, the buckle 50 can be arranged on the first grid 12 or the second grid 13 or at the intersection of the first grid 12 and the second grid 13 , preferably at the intersection. The buckle 50 may include a supporting part 51 and a buckling part 52 integrally formed, and the diameter of the bottom of the supporting part 51 may be 0.2-8 mm. The buckle part 52 can be a hollow circular truncated structure, the diameter of the bottom of the truncated circle is greater than the diameter of the bottom of the support part 51, and the diameter of the top of the truncated circle can be between the bottom diameter of the support part 51 and its own bottom diameter, so as to facilitate the insertion of the buckle 50. Continuing to refer to (a) and (b) in FIG. 12 , the base plate 30 can be provided with a through hole matching the buckle 50, and when the buckle 50 is not subjected to external force, the diameter of the bottom of the round table of the buckle 52 is larger than The diameter of the through hole, when the buckle part 50 is subjected to an external force, the diameter of the bottom of the round platform of the buckle part 52 is smaller than the diameter of the through hole, when the buckle part 52 passes through the through hole completely, due to its own elasticity, the diameter of the buckle part 52 The diameter is larger than the diameter of the through hole. At this time, the buckling member 50 is buckled on the side of the substrate 30 away from the light-shielding frame 10 . The height of the support portion 51 may be the same as the thickness of the base plate 30 , so that the buckle 50 is firmly locked in the through hole, preventing the buckle 50 from loosening.

In some other embodiments, referring to Fig. 13, Fig. 14, Fig. 15 and Fig. 16, the first fixing member includes a plurality of first fixing holes 60, the second fixing member may include a plurality of second fixing holes, and the first fixing hole 60 and the second fixing hole are fastened by screws 61 (such as self-tapping screws, etc.). The first fixing holes 60 may be uniformly distributed at the center, four corners and four sides of the light shielding frame 10 and face one side of the substrate 30 . Specifically, the first fixing hole 60 may be provided on the first grid 12 or the second grid 13 or at the intersection of the first grid 12 and the second grid 13 , preferably at the intersection. The first fixing hole 60 can be used to receive and rotate the screw 61 to fix the light shielding frame 10 and the base plate 30 . During assembly, the screw 61 can pass through the second fixing hole of the base plate 30 to the first fixing hole 60 on the shade frame 10 from the side of the base plate 30 away from the shade frame 10, so as to realize fixing. Part of the drawings after successful assembly can be See Figure 16. The above method can prevent the screws 61 from being exposed on the surface of the light-shielding frame 10 , thereby ensuring the appearance consistency of the light-shielding frame 10 and preventing the screws from affecting the display of the LED display screen 100 . Of course, other types of screws (bolts) can also be used to pass through the second fixing hole of the base plate 30 from the side of the base plate 30 facing away from the shade frame 10 to the first fixing hole 60 on the shade frame 10, and to achieve fixing by screwing .

Optionally, the optical film 20 can be fixed on the light-emitting surface of the light-shielding frame 10 by glue or a clamp. The selection of the optical film 20 may be a diffusion film for diffusing the angle of the outgoing light to increase the filling rate of the LED display screen 100 , or a polarizing film for realizing 3D display. It can be understood that, in one embodiment, the optical film 20 may also be a protective film for waterproofing and dustproofing the LED display screen, and its material may be high polymer or special glass. During assembly, the light-shielding frame 10 can be fixed on the substrate 30 first, and then the optical film 20 can be fixed on the light-emitting surface of the light-shielding frame 10 by glue or clamping parts, so as to avoid damage to the optical film 20 . The optical film 20 can also prevent dust and water from entering the light-shielding frame 10 and improve the packaging tightness of the LED display screen 100 .

In some embodiments, a positioning column (not shown in the figure) can also be provided on the shade frame 10, and the positioning column can be arranged on the first grid 12 or the second grid 13 or the first grid 12 and the second grid. The intersection of grille 13. The positioning column can be used for positioning and assembling with the base plate 30 . Wherein, a positioning hole (not shown) matching the positioning column can be set on the base plate 30. When the light-shielding frame 10 is fixedly installed on the base plate 30, the positioning column and the positioning hole can play a positioning role, and the fixedly installed position can be lifted. efficiency. Of course, positioning posts may also be provided on the base plate 30 , and positioning holes may be provided on the light shielding frame 10 .

Optionally, the inner walls of the first grid 12 and the second grid 13 of the light-shielding frame 10 are coated with a light-shielding layer, so that a light-tight chamber is formed inside each, so that light leakage between the light-shielding frames 10 can be avoided. Therefore, when the LED light-emitting unit is placed in the light-shielding frame 10, it is further ensured that the light of the LED light-emitting units in the adjacent grid 11 does not crosstalk, and only the light is emitted from the side where the optical film 20 is provided on the light-shielding frame 10, further The brightness and uniformity of light are improved to enhance the display effect of the LED display screen 100 .

It should be understood that the above-mentioned structures do not represent all components of the LED display screen 100, and the LED display screen 100 may also be provided with other components to complete its functions, such as drive components or power supply components.

The above is only the implementation of the application, and does not limit the patent scope of the application. Any equivalent structure or equivalent process conversion made by using the specification and drawings of the application, or directly or indirectly used in other related technologies fields, are all included in the scope of patent protection of this application in the same way.

Claims (10)

1. A kind of LED display screen, it is characterized in that, comprise substrate and light-shielding frame, described substrate is provided with the LED light-emitting unit of array distribution; The light-shielding frame is arranged on the outgoing light path of the LED light-emitting unit, and includes a plurality of grids distributed in an array, and a plurality of first fixing members are arranged on the side of the grid adjacent to the substrate. The area corresponding to the first fixing part is provided with a second fixing part. 2. The LED display screen according to claim 1, wherein the first fixing member includes a fastener integrally formed with the shade frame, and the second fixing member is a fastener corresponding to the fastener. Through holes, the fastening member is assembled with the through holes of the base plate in an interference manner. 3. The LED display screen according to claim 2, wherein the fastener comprises a first structure and a second structure, one end of the first structure is connected to the shade frame, and the second structure is stacked It is arranged at the other end of the first structure. 4. The LED display screen according to claim 3, wherein the first structure is one of a frustum of a cone, a cylinder or a cone, and the second structure is one of a frustum of a cone, a cone or a cylinder kind of. 5. The LED display screen according to claim 4, wherein the outer surface of the first structure is provided with an elastic body or a screw structure. 6. The LED display screen according to claim 1, wherein the first fixing member comprises a plurality of integrally formed buckles, the second fixing member is a through hole corresponding to the buckling members, The buckle is assembled with the through hole through snap fit. 7. The LED display screen according to claim 1, wherein the first fixing member includes a plurality of first fixing holes, the second fixing member includes a plurality of second fixing holes, and the first fixing hole And the second fixing hole is fastened by screws. 8. The LED display screen according to claim 1, further comprising an optical film, the optical film comprising one of a diffusion film, a polarizing film or a protective film, and the optical film is passed through glue or The clamping piece is fixed on the light emitting surface of the light shielding frame. 9 . The LED display screen according to claim 1 , wherein the shade frame further comprises a positioning column, and the positioning column is used for positioning and assembling with the substrate. 10. The LED display screen according to claim 1, wherein the shade frame comprises a first grid and a second grid, and the first fixing member is arranged on the first grid and the second grid. The intersection area of the grid.