Display module and display device

Abstract

The present invention relates to the technical field of display devices, and particularly to a display module and a display device. The display module includes a housing frame including a power box and a plurality of sub-frames located on both the left and right sides of the power box, with the sub-frames arranged vertically in order, and a plurality of display units corresponding to the sub-frames one-to-one, with the driving circuits and mounting members of the display units all located in the left and / or right regions, and sound-permeating holes evenly distributed in the middle region of the front panel, and the display modules are attached to the corresponding sub-frames by the mounting members in the left and / or right regions. The present invention can increase the sound-permeating area and improve sound permeability, and is suitable for splicing into large display devices, improving heat dissipation performance.

Description

[Technical Field]

[0001] The present invention relates to the technical field of display devices, and more particularly to display modules and display devices. [Background technology]

[0002] LED display devices have gradually entered a mature stage, and the speed of product changes has slowed down. LED display device companies are also actively exploring new markets to expand their application range and market size. The movie market is one of the directions they are exploring.

[0003] Currently, devices installed in commercial movie theaters that play commercial movies require audio synchronization with video, and audio playback and processing in movie theaters is considered as important as the screen display. When using display devices with speakers located on the edges of the screen, there is no sound in the middle, making it impossible to make the device larger.

[0004] To achieve sound transmission through the center of a display device, some prior art has proposed providing sound vents in the display device. For example, Patent Application No. CN216287381U discloses a display module with sound vents in the lamp panel. However, the lamp panel structure has a control chip located in the center of the lamp panel and a magnetic part located on the edge of the lamp panel. As a result, the sound vents are unevenly distributed across the lamp panel, and the control chip area and the magnetic part each occupy a certain amount of space, reducing the area available for the sound vents, significantly affecting the sound transmission effect. In addition, the control chip is concentrated in the center, making it difficult for heat to escape, which causes the luminous tube to overheat and shifts the chromaticity coordinates, significantly affecting the display effect. Summary of the Invention [Problem to be solved by the invention]

[0005] In order to solve the above technical problems, the present invention provides a display module and a display device that can increase the sound transmission area and improve the sound transmission effect, and can be applied to splicing connections to large display devices, thereby improving heat dissipation performance. [Means for solving the problem]

[0006] The display module of the present invention comprises: a housing frame including a power supply box and a plurality of sub-frames located on both sides of the power supply box, the sub-frames on each side being arranged in order along a vertical direction; a plurality of display units each corresponding to a plurality of the subframes on a one-to-one basis, wherein the drive circuits and mounting members of the display units are both provided in the left and / or right regions, and sound-permeable hole structures are uniformly distributed in the middle region of the display units, and the display units are mounted on the corresponding subframes by the mounting members in the left and / or right regions; Includes.

[0007] The power supply box includes a main body and a rear cover, and an anti-theft lock and a first microswitch are fitted and attached between the rear cover and the main body.

[0008] The main body has cable holes on the top and bottom.

[0009] the display unit includes a PCB substrate, a mask provided on a light-emitting surface of the PCB substrate, and a metal plate provided on a driving surface of the PCB substrate; an array of light-emitting pixels is provided over the entire light-emitting surface of the PCB board, and a first sound-passing hole is opened between every four adjacent light-emitting pixels in the middle region of the light-emitting surface of the PCB board; the drive circuit for driving the light-emitting pixels, the mounting member for fixedly mounting the metal plate and the sub-frame, a second microswitch, and a third microswitch are provided in the left and / or right region of the drive surface of the PCB board; a switch through-hole is opened in the left and / or right region of the metal plate at a position corresponding to the third microswitch, and a mounting member through-hole is opened in the middle region of the metal plate at a position corresponding to the mounting member for fixedly mounting the sub-frame; and a second sound-passing hole is opened in the middle region of the metal plate; A third sound-passing hole is opened in the middle region of the mask, and the third sound-passing hole opened in the mask and the first sound-passing hole opened in the PCB board correspond to each other.

[0010] The mask and the PCB substrate are fixed together by an adhesive.

[0011] The mask is made of an electromagnetic shielding material.

[0012] An insulating and vibration-damping material is filled between the metal plate and the PCB substrate.

[0013] The metal plate further has an accommodating space at a position corresponding to the protruding element of the driving circuit in the left and / or right region thereof.

[0014] The first sound-passing hole formed in the PCB substrate is a plated through-hole.

[0015] The housing frame is made of metal or is fitted into a metal protective case.

[0016] The display device includes at least one of the above display modules.

[0017] When the display device is a movie screen formed by splicing together a plurality of the display modules, a movie server is attached to one of the display modules, and the display module to which the movie server is attached is located in one corner of the movie screen. [Effects of the Invention]

[0018] The beneficial effects of the present invention are as follows: According to the display unit of the present invention, the driving circuit and the unit mounting position are two-in-one, and both are located in the side area, so that the sound-permeable hole structure in the display unit can be concentrated and evenly distributed in the middle position, thereby expanding the sound-permeable area and improving the sound-permeable effect. This is suitable for splicing into large display devices. Since the driving circuit is located in direct contact with the frame, the frame can easily conduct heat, thereby improving the heat dissipation performance. [Brief explanation of the drawings]

[0019] [Figure 1] 1 is a structural diagram of a display module according to an embodiment of the present invention from one viewing angle. [Figure 2] 1 is a partial structural view of a display module according to an embodiment of the present invention from another viewing angle; [Figure 3] 1 is a structural diagram of a display module including a specific structure of a power box according to an embodiment of the present invention, viewed from one angle. [Figure 4] FIG. 4 is an enlarged view of a portion A in FIG. [Figure 5] 1 is an exploded view of a display unit according to an embodiment of the present invention from one angle. [Figure 6] FIG. 2 is an exploded view of the display unit according to the embodiment of the present invention, viewed from another angle. [Figure 7] 1 is a structural diagram of a display unit according to an embodiment of the present invention from one viewing angle. [Figure 8] 1 is a structural diagram of a display module including a movie server according to an embodiment of the present invention, viewed from one angle. [Figure 9] 10 is a structural diagram of a display module including a movie server according to an embodiment of the present invention, viewed from another angle. DETAILED DESCRIPTION OF THE INVENTION

[0020] The following clearly and completely describes the technical configurations of the embodiments of the present invention with reference to the drawings in the embodiments of the present invention, and the described embodiments are only a part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments that a person skilled in the art can derive without any creative work fall within the scope of protection of the present invention.

[0021] As shown in Figures 1 and 2, the display module of this embodiment of the present invention includes a housing frame 100 and a plurality of display units 200. The housing frame 100 includes a power box 110 and a plurality of sub-frames 120 located on the left and right sides of the power box 110. The sub-frames 120 on each side are distributed sequentially along the vertical direction. The plurality of display units 200 correspond one-to-one to the plurality of sub-frames 120. The driving circuits and mounting members of the display units 200 are all located in the left and / or right regions. Sound-permeable hole structures are evenly distributed in the middle region of the display units 200. The display units 200 are mounted on the corresponding sub-frames 120 by the mounting members in the left and / or right regions.

[0022] According to the display module of the embodiment of the present invention, the driving circuit of the display unit and the unit mounting position are two-in-one, both located in the side area, so that the sound-permeable hole structure of the display unit can be concentrated and evenly distributed in the middle position, thereby expanding the sound-permeable area and improving the sound-permeable effect. It is suitable for splicing to large display devices. Since the driving circuit is located at the point where it directly contacts the frame, the frame can easily conduct heat, thereby improving the heat dissipation performance.

[0023] In one embodiment of the present invention, as shown in Figures 1, 2, 3, and 4, a power supply box 110 includes a main body 111 and a rear cover 112. All display unit power supplies, control panels, power lines, control lines, and signal lines are installed in the power supply box 110. An anti-theft lock 113 and a first microswitch 114 can be fitted and installed between the rear cover 112 and the main body 111. The anti-theft lock 113 makes it difficult for unauthorized persons to open the rear cover 112 of the power supply box 110, thereby improving the anti-theft performance. The first microswitch 114 is installed in the main body 111, and its switch button is pressed when the rear cover 112 is properly installed. When the rear cover 112 is removed and the pressure on the switch button is released, the first microswitch 114 can be triggered. The first microswitch 114 is connected to a safety monitoring circuit or a safety execution circuit, and when it is triggered, it can issue a safety alarm, that is, send information to the outside that the power box 110 has been accidentally opened, or perform a safety operation. For example, in a movie screen application scenario, the movie server can stop playing the movie when the first microswitch 114 is triggered, thereby preventing the movie data information from being stolen and the movie material from being pirated.

[0024] In addition, as shown in Figures 1 and 3, a self-check switch 115 is further provided in the power supply box 110, and the self-check switch 115 is connected to a self-check circuit on a control board in the main body 111, and is opened only when the power supply box 110 is unavoidable. Therefore, by providing the self-check switch 115, when power is applied to the display module, the self-check switch 115 is triggered, and it is possible to detect whether the display module is normal.

[0025] As shown in Figures 1, 2 and 3, cable holes 116 are provided on the upper and lower sides of the main body 111, and the cable holes 116 are used to pass cables such as power lines, control lines and signal lines when the display module is spliced ​​to form a display device or when it is externally connected to other electrical equipment or electrical elements.

[0026] As shown in FIGS. 1, 2 and 3, the four peripheral surfaces of the housing frame 100 are flat, and these flat surfaces can be used as joining surfaces when splicing display modules together, allowing adjacent display modules to be brought into close contact with each other.

[0027] 5 and 6, a display unit 200 includes a PCB substrate 210, a mask 220 provided on the light-emitting surface of the PCB substrate 210, and a metal panel 230 provided on the driving surface of the PCB substrate 210. The light-emitting surface of the PCB substrate 210 is generally provided with an array of light-emitting pixels 211, and a first sound-passing hole 212 is provided between every four adjacent light-emitting pixels 211 in the central region of the light-emitting surface of the PCB substrate 210. The left and / or right regions of the driving surface of the PCB substrate 210 are provided with a driving circuit 213 for driving the light-emitting pixels 211 (only some elements of the driving circuit 213 are enclosed in FIG. 5), a mounting member 214 for fixedly mounting the metal plate 230 and the sub-frame 120, a second microswitch 215, and a third microswitch 216. A switch 216 is provided, and in the left and / or right regions of the metal plate 230, a switch through hole 231 is opened at a position corresponding to the third microswitch 216, and a mounting member through hole 232 is opened at a position corresponding to the mounting member 214 that fixedly mounts the subframe 120, a second sound hole is opened in the middle region of the metal plate 230, and a third sound hole is opened in the middle region of the mask 220, and the third sound hole opened in the mask 220 and the first sound hole 212 opened in the PCB board 210 correspond to each other.

[0028] It should be noted that the PCB substrate 210, the mask 220, and the metal plate 230 are attached over each other and aligned to form a single display module plate as shown in FIG. 7, so the shapes and areas of the three are the same, and the sizes of the middle region and left and right side regions of the three are also correspondingly the same.

[0029] In one embodiment of the present invention, the light-emitting pixels 211 are LEDs, and the first sound holes 212 of the PCB substrate 210 are circular. Since the main purpose of installing the mask 220 is to enhance the display effect, the mask 220 and the first sound holes 212 of the PCB substrate 210 should correspond in position, shape, and size to each other in order to enhance the display effect itself and ensure that the sound transmission effect of the display unit 200 is the same as when the mask 220 is not installed. Since the metal plate 230 is located on the rear side of the PCB substrate 210, the size, shape, and distribution of its second sound holes do not affect vision. Therefore, the second sound holes of the metal plate 230 only need to be arranged so as not to block the first sound holes 212 of the PCB substrate 210 in the front-rear direction and to allow sound to smoothly pass through the first sound holes 212 of the PCB substrate 210. Optionally, the second acoustic holes formed in the metal plate 230 can be made to correspond to the first acoustic holes 212 formed in the PCB board 210 .

[0030] In each PCB board 210, the drive circuit 213 may be provided in the areas on both the left and right sides of the drive surface, or may be provided in either the left or right side area of ​​the drive surface, the mounting member 214 for fixedly attaching the metal plate 230 may be provided in the areas on both the left and right sides of the drive surface, or may be provided in either the left or right side area of ​​the drive surface, the mounting member 214 for fixedly attaching the subframe 120 may be provided in the areas on both the left and right sides of the drive surface, or may be provided in either the left or right side area of ​​the drive surface, the second microswitch 215 may be provided in the areas on both the left and right sides of the drive surface, or may be provided in either the left or right side area of ​​the drive surface, and the third microswitch 216 may be provided in the areas on both the left and right sides of the drive surface, or may be provided in either the left or right side area of ​​the drive surface.

[0031] 5, 6, and 7, in one specific embodiment of the present invention, a mask 220 is attached to cover the light-emitting surface of a PCB substrate 210, and a metal plate 230 is attached to cover the driving surface of the PCB substrate 210. Assuming that the metal plate 230 is positioned at the rear and the mask 220 is positioned at the front, the driving circuit 213 is only provided on the right side of the driving surface. Mounting members 214 for fixedly mounting the metal plate 230 are provided on both the left and right sides of the driving surface. The three cylindrical bodies on the right side of the PCB substrate 210 in FIG. 5 are the mounting members 214 for fixedly mounting the metal plate 230. To achieve fitting, the metal plate 230 has three through-holes corresponding to the three cylindrical bodies, and the same is true on the left side. Mounting member 214 for fixedly mounting subframe 120 is provided only in the right region of the drive surface, and in Figure 7 it is this mounting member 214 that passes through mounting member through-hole 232 for fixedly mounting display unit 200 to subframe 120. Second microswitches 215 are provided in the regions on both the left and right sides of the drive surface, two on each side, and the switch button is pressed when metal plate 230 is correctly mounted, and when the pressure on the switch button is released upon removal of metal plate 230, second microswitch 215 can be triggered. The third microswitches 216 are provided in the regions on both the left and right sides of the drive surface, with two provided in each region on each side. As shown in FIG. 7, the third microswitches 216 pass through the switch through-holes 231, and the switch button is pressed when the display unit 200 is attached to the subframe 120. When the display unit 200 is removed and the pressure on the switch button is released, the third microswitch 216 can be triggered.The second microswitch 215 and the third microswitch 216 are both connected to a safety monitoring circuit or a safety execution circuit, and when the second microswitch 215 is triggered, a safety alarm can be issued, i.e., information is transmitted to the outside that the metal plate 230 has been detached from the PCB board 210; when the third microswitch 216 is triggered, a safety alarm can be issued, i.e., information is transmitted to the outside that the display unit 200 has been detached from the sub-frame 120; or when the second microswitch 215 or the third microswitch 216 is triggered, a safety operation can be performed. For example, in a movie screen application scenario, when the second microswitch 215 or the third microswitch 216 is triggered, the playback of the movie can be stopped, thereby preventing the movie data information from being stolen and the movie material from being pirated.

[0032] In one embodiment of the present invention, the mask 220 and the PCB substrate 210 are fixed with adhesive, which avoids the need for screws, fasteners, or inserts on the light-emitting surface, thereby avoiding any adverse effect on the display.

[0033] In one embodiment of the present invention, the mounting members 214 for fixedly mounting the metal plate 230 and the sub-frame 120 may be conventional screw members, locking members, insert members, etc. In other embodiments of the present invention, the mounting between the PCB board 210 and the metal plate 230 and the mounting between the display unit 200 and the sub-frame 120 may also be replaced with adhesive, and in this case, the mounting members 214 may be embodied as adhesive regions.

[0034] In one embodiment of the present invention, one of the functions of the metal plate 230 is to cover the driving circuit to prevent it from being exposed to the outside and signal theft, as well as to shield electromagnetic signals and maintain electromagnetic compatibility, preventing metal objects from entering the driving surface through the second sound hole to steal signals and pirate film material. To further improve this effect, in one embodiment of the present invention, the mask 220 can be made of an electromagnetic shielding material, and the first sound hole 212 opened in the PCB board 210 is a plated through hole.

[0035] In addition, since some elements in the driving circuit 213 on the driving surface of the PCB substrate 210 may be large in volume and may protrude significantly relative to other elements, in one embodiment of the present invention, in order to avoid increasing the thickness of the display unit 200 and ensure the flatness of the metal plate 230, an accommodation space may be provided in the left and / or right regions of the metal plate 230 at a position corresponding to the protruding element of the driving circuit 213. The accommodation space may be a sink groove or a sink hole that can accommodate the protrusion of the element.

[0036] In one embodiment of the present invention, in consideration of the requirements of vibration damping, sound absorption and insulation, an insulating vibration-damping material, such as an insulating vibration-damping pad made of rubber, can be filled between the metal plate 230 and the PCB substrate 210.

[0037] In one embodiment of the present invention, the housing frame 100 may be made of metal or may be fitted into a metal protective case, which improves the overall mechanical strength of the display module while also improving heat conduction efficiency and further improving heat dissipation performance.

[0038] According to the above, the display module of the embodiment of the present invention has a uniform and concentrated sound-venting hole structure for each display unit, and the display device formed by splicing them together is suitable for placing the sound on the back side, which is applicable to large display devices and ensures the sound-venting effect of large display devices. Its driving circuit is in direct contact with the frame, which has excellent heat dissipation performance. The installation of three microswitches can prevent theft of hardware and movie information. The design of the metal plate, shielding mask and plated sound-venting holes can effectively prevent electromagnetic interference and effectively prevent theft of video information. The insulating vibration-damping material filled between the metal plate and the PCB board can improve the vibration-damping and sound-deadening effect and meet the needs of insulation.

[0039] The present invention further provides a display device based on the display module of the above embodiment.

[0040] The display device of the embodiment of the present invention is formed by splicing together at least one of the display modules of the above embodiment, and has excellent sound transmission and heat dissipation properties.

[0041] When the display device is a movie screen made up of multiple display modules spliced ​​together, the movie server must be attached to one of the display modules, and as shown in Figures 8 and 9, when the movie server 300 is attached to the display module, some of the sound-permeable hole structures are blocked, resulting in a lower sound transmission rate for this display module than for other display modules. In order to avoid significantly affecting the sound transmission effect of the movie screen, in one embodiment of the present invention, the display module to which the movie server 300 is attached can be located in one corner of the movie screen (e.g., the lower left corner or the lower right corner).

[0042] In describing the invention, the terms "first" and "second" are used for descriptive purposes only and should not be understood to denote or imply the relative importance or number of the indicated technical features. Thus, features defined as "first" and "second" may explicitly or implicitly include one or more of such features. "Plurality" means two or more, unless otherwise specified.

[0043] In the present invention, unless otherwise specified, the terms "attached," "coupled," "connected," "fixed," etc. should be understood in a broad sense, and may refer to, for example, a fixed connection, a detachable connection, or an integral connection, a mechanical connection, an electrical connection, a direct connection, an indirect connection via an intermediate medium, internal communication between two elements, or an interactive relationship between two elements. Those skilled in the art will be able to understand the specific meanings of the above terms in the present invention depending on the specific situation.

[0044] In this invention, unless otherwise specified, a first feature being "above" or "below" a second feature may mean that the first feature and the second feature are in direct contact with each other, or that the first feature and the second feature are in indirect contact with each other via an intermediate medium. Furthermore, a first feature being "above," "above," or "upper side" of a second feature simply means that the first feature is directly above or diagonally above the second feature, or that the first feature is higher in the horizontal plane than the second feature. A first feature being "below," "below," or "lower side" of a second feature simply means that the first feature is directly below or diagonally below the second feature, or that the first feature is lower in the horizontal plane than the second feature.

[0045] In the description herein, when a description refers to terms such as "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," it means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, general descriptions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any appropriate manner in any one or more embodiments or examples. Furthermore, those skilled in the art may combine and combine different embodiments or examples and features of different embodiments or examples described herein without mutual contradiction.

[0046] Although the embodiments of the present invention have been shown and described above, the above embodiments are illustrative and should not be construed as limiting the present invention, and it should be understood that those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention. [Explanation of symbols]

[0047] 100 Housing Frame 200 display units 300 Movie Server 110 Power Box 120 subframe 210 PCB board 220 Mask 230 Metal Panel 111 Main Unit 112 Rear cover 113 Anti-theft lock 114 First microswitch 115 Self-check switch 116 Cable port 211 luminescent pixels 212 First sound hole 213 Drive Circuit 214 Mounting material 215 Second microswitch 216 Third Microswitch 231 Switch through hole 232 Mounting member through hole

Claims

1. a housing frame including a power supply box and a plurality of sub-frames located on both sides of the power supply box, the sub-frames on each side being arranged in order along a vertical direction; a plurality of display units corresponding one-to-one to the plurality of subframes, wherein the drive circuits and mounting members of the display units are both provided in the left and / or right regions, and sound-permeable hole structures are uniformly distributed in the middle region of the display module, and the display units are mounted on the corresponding subframes by the mounting members in the left and / or right regions; A display module comprising:

2. 2. The display module according to claim 1, wherein the power supply box includes a main body and a rear cover, and an anti-theft lock and a first microswitch are fitted and attached between the rear cover and the main body.

3. 3. The display module according to claim 2, wherein cable holes are provided on the upper and lower sides of the main body.

4. the display unit includes a PCB substrate, a mask provided on a light-emitting surface of the PCB substrate, and a metal plate provided on a driving surface of the PCB substrate; An array of light-emitting pixels is provided over the entire light-emitting surface of the PCB substrate, and a first sound-passing hole is opened between every four adjacent light-emitting pixels in a middle region of the light-emitting surface of the PCB substrate, and the drive circuit for driving the light-emitting pixels, the mounting member for fixedly mounting the metal plate and the sub-frame, a second microswitch, and a third microswitch are provided in a left and / or right region of the drive surface of the PCB substrate, In the left and / or right regions of the metal plate, a switch through-hole is opened at a position corresponding to the third microswitch, a mounting member through-hole is opened at a position corresponding to the mounting member that fixedly mounts the subframe, and a second sound-passing hole is opened in the middle region of the metal plate, A display module described in any one of claims 1 to 3, characterized in that a third sound-passing hole is opened in the middle region of the mask, and the third sound-passing hole opened in the mask and the first sound-passing hole opened in the PCB substrate correspond to each other.

5. 5. The display module according to claim 4, wherein the mask and the PCB substrate are fixed by an adhesive.

6. 6. The display module of claim 5, wherein the mask is made of an electromagnetic shielding material.

7. 7. The display module according to claim 6, wherein an insulating vibration-damping material is filled between the metal plate and the PCB substrate.

8. 8. The display module according to claim 7, wherein an accommodating space is further provided in the left and / or right regions of the metal plate at a position corresponding to the protruding element of the driving circuit.

9. 9. The display module according to claim 8, wherein the first sound-passing hole formed in the PCB substrate is a plated through-hole.

10. 2. The display module according to claim 1, wherein the housing frame is made of a metal material or is fitted into a metal protective case.

11. A display device comprising at least one display module according to any one of claims 1 to 10.

12. 12. The display device according to claim 11, wherein when the display device is a movie screen formed by splicing together a plurality of the display modules, a movie server is attached to one of the display modules, and the display module to which the movie server is attached is provided in one corner of the movie screen.

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