Circuit boards, displays and display devices

Abstract

This application relates to a circuit board, a display screen, and a display device, including a first board layer and a second board layer. The first board layer and the second board layer are stacked along the thickness direction of the circuit board. The first board layer is equipped with a negative power supply and signal layer, and the second board layer is equipped with a positive power supply layer. Along the thickness direction of the circuit board, the cross-sectional area of ​​the second board layer is larger than that of the first board layer. The first board layer is used for electrical connection with a housing, and both the first and second board layers are used for electrical connection with light-emitting elements. In this solution, the housing, through contact electrical connection with a third board layer, can act as the negative power supply and signal lines embedded in the first and third board layers. That is, the negative power supply and signal lines that would originally be embedded in the first and third board layers can be transferred and merged into the housing, allowing the current and control signals to be conducted to different light-emitting elements within the board through the housing.

Description

Technical Field

[0001] This application relates to the technical field of display devices, and in particular to a circuit board, a display screen, and a display equipment. Background Technology

[0002] Outdoor LED grating screens are displays that incorporate LED light sources. Through their strip-shaped and perforated structure, they create unique visual effects. They not only inherit the brightness and clarity advantages of traditional LED displays but also achieve a perfect blend of transparency and aesthetics through their ingenious perforation design. To achieve better display results, the spacing requirements for outdoor LED grating screens are becoming increasingly smaller, while their application area is also growing larger, often exceeding several hundred square meters. This results in very long individual LED strips and a greater number of LEDs arranged on them.

[0003] Typically, a single LED has four pins, each requiring a wire connection. Furthermore, due to the minimum transmittance requirement of 66.7%, the width of the LED strip PCB is also limited, resulting in a large number of traces within the PCB, with small wire diameters and long wiring lengths. This leads to two main problems: firstly, the excessively long current conduction path causes significant power attenuation, resulting in poor display quality and insufficient brightness, failing to meet usage requirements. Using a higher-powered power supply to artificially increase brightness would further exacerbate overheating and power consumption. Secondly, the complex and dense wiring within the LED strip PCB increases the difficulty of layout design and etching, and tightening screws during installation can easily break the circuitry, causing display defects and safety hazards. Utility Model Content

[0004] Therefore, it is necessary to provide a circuit board, display screen, and display device to address the problems of high power loss, difficult design and manufacturing, and potential safety hazards of wire breakage in traditional technologies.

[0005] In a first aspect, this application provides a circuit board including a first board layer and a second board layer, wherein the first board layer and the second board layer are stacked along the thickness direction of the circuit board, the first board layer is provided with a negative power supply and a signal layer, the second board layer is provided with a positive power supply layer, and along the thickness direction of the circuit board, the cross-sectional area of ​​the second board layer is larger than the cross-sectional area of ​​the first board layer.

[0006] The first plate is used for electrical connection with the housing, and the first plate and the second plate are used for electrical connection with the light emitter.

[0007] The technical solution of this application will be further described below:

[0008] In one embodiment, the circuit board further includes a third board layer, and the second board layer is stacked between the first board layer and the third board layer. The first board layer and the third board layer are both provided with negative power supply and signal layers, and the second board layer is provided with a positive power supply layer.

[0009] The first plate, the second plate, and the third plate are all used for electrical connection with the light-emitting element.

[0010] In one embodiment, at least two second plates are provided, and at least two second plates are stacked between the first plate and the third plate.

[0011] In one embodiment, the first plate layer has a first connecting through hole, the second plate layer has a second connecting through hole, and the third plate layer has a third connecting through hole. An electrical connection structure is provided in the first connecting through hole, the second connecting through hole, and the third connecting through hole so that the first plate layer and the second plate layer, as well as the second plate layer and the third plate layer, are electrically connected and conductive through the electrical connection structure.

[0012] A second aspect of this application also provides a display screen comprising a plurality of display units, said display unit comprising:

[0013] A housing, on which a positive connection terminal and a negative connection terminal are mounted;

[0014] The circuit board as described in any of the above embodiments is mounted on the housing, and the first board layer is electrically connected to the housing;

[0015] Multiple light-emitting elements are arranged on the surface of the second board layer opposite to the first board layer, and the light-emitting elements are electrically connected to the circuit board; and

[0016] A first conductive component is electrically connected to the first plate and the second plate, electrically connected to the housing, and electrically connected to the positive connection terminal and the negative connection terminal.

[0017] In one embodiment, the first conductive component uses a first conductive screw, the first plate has a first mounting through hole, the second plate has a second mounting through hole, the third plate has a third mounting through hole, the housing has a first threaded hole, the first mounting through hole, the second mounting through hole, and the third mounting through hole are aligned with the first threaded hole, the first conductive screw passes through the first mounting through hole, the second mounting through hole, and the third mounting through hole, and the first conductive screw is screwed into the first threaded hole, with the screw head of the first conductive screw abutting against the first plate.

[0018] In one embodiment, the display unit further includes a second conductive component, which is spaced apart from one side of the first conductive component. The second conductive component is electrically connected to and installed with the first plate, the second plate, and the third plate, and is electrically connected to the housing.

[0019] In one embodiment, the second conductive component employs a second conductive screw. The first plate has a fourth mounting through hole, the second plate has a fifth mounting through hole, the third plate has a sixth mounting through hole, and the housing has a second threaded hole. The fourth, fifth, and sixth mounting through holes are aligned with the second threaded hole. The second conductive screw passes through the fourth, fifth, and sixth mounting through holes and is screwed into the second threaded hole. The screw head of the second conductive screw abuts against the second plate.

[0020] In one embodiment, the display screen further includes a first wire and a second wire, one end of the first wire being connected to the first conductive component and the other end of the first wire being connected to the positive connection terminal, one end of the second wire being connected to the first conductive component and the other end of the second wire being connected to the negative connection terminal.

[0021] In one embodiment, at least a portion of the positive connection terminal and / or the negative connection terminal extends outside the housing.

[0022] In one embodiment, the housing is recessed to form a receiving groove, and the circuit board and at least a portion of the light-emitting element are disposed inside the receiving groove.

[0023] In one embodiment, the housing is made of aluminum profile.

[0024] A third aspect of this application also provides a display device comprising:

[0025] Mounting frame; and

[0026] The display screen as described in any of the above embodiments is mounted on the mounting frame.

[0027] The circuit board in this solution is used in the display screen of a display device. During operation, the housing is electrically connected to the first board layer, allowing the housing to function as the negative power supply and signal lines embedded in the first board layer. In other words, some of the negative power supply and signal lines that would normally be embedded in the first board layer can be transferred and integrated into the housing. The housing then transmits current and control signals to different light-emitting elements within the board. The resulting technical advantages are: firstly, it significantly reduces the number of wiring layers and the amount of wiring for negative power supply and signal lines within the circuit board, reducing the difficulty of circuit board layout design and etching; secondly, due to the reduced number of wiring layers in the first board layer, the thickness of the first board layer can be reduced while maintaining the same circuit board thickness, allowing for a correspondingly larger thickness of the second board layer. By making the cross-sectional area of ​​the second layer larger than that of the first layer, more space is available in the second layer to accommodate the positive power lines. This also allows for wider wiring embedded in the second layer, making it less prone to breakage even if accidentally squeezed by the first and / or second conductive components during installation. This avoids display defects and safety hazards. Furthermore, the wider wiring in the second layer facilitates heat dissipation, preventing burnout due to overheating and improving reliability. Moreover, compared to wiring with smaller wire diameters, the larger cross-sectional area of ​​the housing for current and control signal transmission results in less signal and current attenuation, thus reducing power loss and ensuring display quality while meeting higher brightness requirements. This also eliminates the need for a high-power power supply, reducing costs. Attached Figure Description

[0028] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments of this application and their descriptions are used to explain this application and do not constitute an undue limitation of this application.

[0029] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0030] Figure 1 This is a schematic diagram of the structure of the display screen described in one embodiment.

[0031] Figure 2 This is a top view of the display unit in one embodiment.

[0032] Figure 3 for Figure 2 A side view of the display unit.

[0033] Figure 4 for Figure 2A cross-sectional view of the display unit at point AA.

[0034] Figure 5 This is a schematic cross-sectional view of the circuit board in one embodiment.

[0035] Figure 6 This is an assembly structure diagram of the first conductive component, the second conductive component, the circuit board, and the housing in one embodiment.

[0036] Figure 7 This is a cross-sectional structural diagram of a circuit board according to another embodiment.

[0037] Explanation of reference numerals in the attached figures:

[0038] 100, Display screen; 10a, Display unit; 10, Housing; 11, Receiving slot; 20, Positive connection terminal; 30, Negative connection terminal; 40, Circuit board; 41, First board layer; 42, Second board layer; 43, Third board layer; 50, Light emitter; 60, First conductive component; 70, Second conductive component. Detailed Implementation

[0039] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0040] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0041] Furthermore, where the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0042] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0043] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0044] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.

[0045] For outdoor grating screens, the minimum transmittance of 66.7% limits the width of the LED strip PCB, resulting in a large number of traces with small wire diameters and long wiring lengths. This leads to several problems: firstly, the excessively long current conduction path causes significant power attenuation, resulting in poor display quality and insufficient brightness, failing to meet usage requirements. Using a higher-powered power supply to artificially increase brightness would further exacerbate overheating and power consumption. Secondly, the complex and dense wiring within the LED strip PCB increases the difficulty of layout design and etching, and tightening screws during installation can easily break the circuitry, causing display defects and safety hazards.

[0046] To address the aforementioned issues, this solution employs a housing 10 with current and signal conduction capabilities, combined with the circuit board 40. This transfers and merges some of the negative power supplies and signal lines that would otherwise be embedded within the circuit board 40 into the housing 10. The housing 10 then conducts current and control signals within the board to different light-emitting elements 50, significantly reducing the number of wiring layers and wiring quantities within the circuit board 40, thus simplifying the layout design and etching process. Furthermore, the larger cross-sectional area of ​​the housing 10 facilitates current and control signal conduction, resulting in less signal and current attenuation and reduced power loss, thereby ensuring display quality and meeting the demands for higher brightness.

[0047] See Figure 1 This application illustrates a display screen 100 in one embodiment, which can be an outdoor grating screen used in outdoor locations for displaying advertising and other content.

[0048] For example, the display screen 100 includes a plurality of display units 10a, which are arranged side-by-side with intervals along the same direction of the display screen 100 (e.g., the length or width direction of the display screen 100), or arranged in an array structure along two perpendicular directions of the display screen 100. Please continue reading Figure 2 , Figure 4 and Figure 6 Each display unit 10a includes a housing 10, a circuit board 40, multiple light emitters 50, a first conductive component 60, and a second conductive component 70. The second conductive components 70 are arranged at intervals on one side of the first conductive components 60.

[0049] The housing 10 is equipped with a positive connection terminal 20 and a negative connection terminal 30. For example, the positive connection terminal 20 and the negative connection terminal 30 are used to connect to an external power supply and controller to input current and control signals to the display screen 100.

[0050] Optionally, the positive connection terminal 20 and the negative connection terminal 30 can be any one of the following metal materials: columnar body, needle-shaped body, plate-shaped body, clamping body, etc., and can be flexibly selected according to actual needs.

[0051] like Figure 7 As shown, in one embodiment, the circuit board 40 is a double-layer board, that is, the circuit board 40 includes a first layer 41 and a second layer 42, which are stacked along the thickness direction of the circuit board 40. The first layer 41 is provided with a negative power supply and signal layer, and the second layer 42 is provided with a positive power supply layer. Furthermore, along the thickness direction of the circuit board 40, the cross-sectional area of ​​the second layer 42 is larger than the cross-sectional area of ​​the first layer 41.

[0052] During installation and use, the first plate layer 41 is used for electrical connection with the housing 10, and the first plate layer 41 and the second plate layer 42 are used for electrical connection with the light-emitting element 50.

[0053] For further information, please refer to [link / reference]. Figure 5 and Figure 6 Specifically, the circuit board 40 of this application is a multilayer board. Specifically, the circuit board 40 includes a first layer 41, a second layer 42 and a third layer 43, with the second layer 42 stacked between the first layer 41 and the third layer 43.

[0054] Optionally, the first layer 41, the second layer 42, and the third layer 43 can be connected as a single unit using processes such as lamination and bonding.

[0055] The first board layer 41 and the third board layer 43 are both equipped with negative power supply and signal layers, while the second board layer 42 is equipped with a positive power supply layer.

[0056] It should be noted that the first board layer 41 and the third board layer 43 are configured as negative power supply and signal layers. Specifically, the traces embedded in the first board layer 41 and the third board layer 43 serve as both VCC- (i.e., the negative power supply terminal in the circuit) and signal lines, used to connect to the negative terminal of the external power supply and to connect to the controller. The second board layer 42 is configured as a positive power supply layer. Specifically, the traces in the second board layer 42 serve as VCC+ (i.e., the positive power supply terminal in the circuit), used to connect to the positive terminal of the external power supply.

[0057] It should be noted that when the circuit board 40 is a double-layer board, multiple light-emitting elements 50 are arranged on the surface of the second layer 42 away from the first layer 41, and the light-emitting elements 50 are electrically connected to the circuit board 40. When the circuit board 40 is a multilayer board, multiple light-emitting elements 50 are arranged on the surface of the third layer away from the second layer 42.

[0058] For example, the light source 50 can be any one of the following: LED beads, LED strips, LED belts, etc.

[0059] Furthermore, when the light-emitting element 50 uses lamp beads, the lamp beads are specifically LED lamp beads. LED lamp beads have high luminous brightness and save energy.

[0060] The first conductive component 60 is electrically connected to the first plate layer 41, the second plate layer 42 and the third plate layer 43. The first conductive component 60 is electrically connected to the housing 10 and is also electrically connected to the positive connection terminal 20 and the negative connection terminal 30.

[0061] The second conductive component 70 is electrically connected to the first plate layer 41, the second plate layer 42 and the third plate layer 43, and the second conductive component 70 is electrically connected to the housing 10.

[0062] In summary, implementing the technical solution of this embodiment will achieve the following beneficial effects: In the display screen 100 of this solution, the current and control signals transmitted from the outside during operation are connected to the display screen 100 through the positive connection terminal 20 and the negative connection terminal 30 and transmitted to the first conductive component 60. Since the first conductive component 60 forms an electrical connection with the first plate layer 41, the second plate layer 42, the third plate layer 43 and the housing 10, the first conductive component 60 can directly transmit the current and control signals to the light-emitting element 50 that is installed adjacent to it on the first plate layer 41, so that the light-emitting element 50 can be lit up and operated.

[0063] Simultaneously, current and control signals are conducted along the housing 10 and transmitted to the second conductive component 70. Since the second conductive component 70 is electrically connected to the first plate 41, the second plate 42, and the third plate 43, it can transmit current and control signals to other light-emitting elements 50 mounted adjacent to it on the first plate 41, so that the light-emitting elements 50 can be lit up. That is, through the cooperation of the first conductive component 60 and the second conductive component 70, current and control signals can be transmitted to a wider distribution and a larger number of light-emitting elements 50, meeting the need for a larger number of light-emitting elements 50 to be arranged on a single display unit 10a.

[0064] Understandably, more than one second conductive component 70 can be provided. When two or more second conductive components 70 are provided, they can be arranged simultaneously on the same side of the first conductive component 60, or they can be arranged on the left and right sides of the first conductive component 60 respectively; the specific choice can be made flexibly according to actual needs.

[0065] Compared to traditional technologies, the housing 10 in this solution is electrically connected to the first board layer 41, allowing the housing 10 to function as part of the negative power supply and signal lines embedded within the first board layer 41. In other words, some of the negative power supply and signal lines that would normally be embedded in the first board layer 41 can be transferred and integrated into the housing 10. The housing 10 then transmits current and control signals within the board to different light-emitting elements 50. The resulting technical advantages are: firstly, it significantly reduces the number of wiring layers and the amount of wiring for negative power supply and signal lines within the circuit board 40, reducing the layout design and etching difficulty of the circuit board 40; secondly, because the number of wiring layers within the first board layer 41 is reduced, the thickness of the first board layer 41 can be reduced while maintaining the same thickness, allowing for a corresponding increase in the thickness of the second board layer 42. This means that the cross-sectional area of ​​the second layer 42 is larger than that of the first layer 41. As a result, the second layer 42 has more space to arrange the positive power line, and the width of the wiring embedded in the second layer 42 can be increased. This makes it less likely to be crushed by the first conductive component 60 and / or the second conductive component 70 during installation, avoiding display defects and safety hazards. In addition, the wider wiring in the second layer 42 is more conducive to heat dissipation and will not burn out due to excessive heat, thus improving reliability. Furthermore, compared with wiring with smaller wire diameter, the transmission of current and control signals through the housing 10 with a larger cross-sectional area has less signal and current attenuation, thereby reducing power attenuation, ensuring display effect and meeting the display requirements of higher brightness, while eliminating the need for a high-power power supply, thus reducing costs.

[0066] Please continue reading. Figure 5 Furthermore, based on the above embodiments, at least two second board layers 42 are provided, and at least two second board layers 42 are stacked between the first board layer 41 and the third board layer 43. By increasing the number of second board layers 42 arranged between the first board layer 41 and the third board layer 43, not only can high-speed connections be established between different board layers, reducing interference and loss during signal transmission, thereby improving signal transmission speed and stability; in addition, different second board layers 42 can be set as dedicated power layers, ground layers, and signal layers, etc., to better manage power supply and current flow, reduce electromagnetic interference (EMI), and improve the anti-interference capability of the display device; furthermore, by increasing the number of second board layers 42, the number of board layers of the circuit board 40 can be increased to provide more wiring space, which can accommodate more signal lines and power lines, reduce crosstalk between signal lines, and is suitable for complex circuit systems.

[0067] For example, Figure 5 The diagram shows a second plate layer 42 with two layers.

[0068] To enable the conduction of current and signals between the first layer 41, the second layer 42, and the third layer 43, the first layer 41 has a first connecting via, the second layer 42 has a second connecting via, and the third layer 43 has a third connecting via. Electrical connection structures are provided within these vias to ensure electrical connection between the first layer 41 and the second layer 42, and between the second layer 42 and the third layer 43. Specifically, the electrical connection structures electrically connect the traces within the first layer 41, the second layer 42, and the third layer 43.

[0069] For example, the electrical connection structure can be in the form of copper plating, embedded wires, etc., and can be flexibly selected according to actual needs.

[0070] In an optional embodiment, the first conductive component 60 employs a first conductive screw, the first plate 41 has a first mounting through hole, the second plate 42 has a second mounting through hole, the third plate 43 has a third mounting through hole, and the housing 10 has a first threaded hole. The first mounting through hole, the second mounting through hole, and the third mounting through hole are aligned with the first threaded hole. The first conductive screw passes through the first mounting through hole, the second mounting through hole, and the third mounting through hole, and is screwed into the first threaded hole. The screw head of the first conductive screw abuts against the first plate 41.

[0071] The first conductive screw is inserted through the first mounting through hole, the second mounting through hole, and the third mounting through hole, and screwed into the first threaded hole. On the one hand, the circuit board 40 can be firmly installed on the housing 10 by the screw head abutting against the first plate layer 41 and the threaded locking structure, thereby improving the structural stability. On the other hand, the metal first conductive screw itself also has the ability to conduct current and control signals to the circuit board 40 and the light-emitting element 50.

[0072] In another embodiment, the second conductive component 70 adopts a second conductive screw. The first plate 41 has a fourth mounting through hole, the second plate 42 has a fifth mounting through hole, the third plate 43 has a sixth mounting through hole, and the housing 10 has a second threaded hole. The fourth, fifth, and sixth mounting through holes are aligned with the second threaded hole. The second conductive screw passes through the fourth, fifth, and sixth mounting through holes and is screwed into the second threaded hole. The screw head of the second conductive screw abuts against the second plate 42.

[0073] Similarly, a second conductive screw is inserted through the fourth, fifth, and sixth mounting through holes and screwed into the second threaded hole. On the one hand, by using the screw head to abut against the first board layer 41 and the threaded locking structure, the second conductive screw and the first conductive screw cooperate to form more locking points, thereby enabling the circuit board 40 to be more securely installed on the housing 10 and improving structural stability. On the other hand, the metal second conductive screw itself also has conductive capabilities, enabling the transmission of current and control signals to the circuit board 40 and the light-emitting element 50.

[0074] It should be noted that the display screen 100 typically includes multiple display units 10a, which are arranged side-by-side at intervals along a preset direction of the display screen 100. For example, when the display screen 100 is rectangular, the multiple display units 10a, i.e., multiple circuit boards 40, can be arranged side-by-side at intervals along the length or width of the display screen 100. Each circuit board 40 has a rectangular strip structure, such that multiple light-emitting elements 50 on each circuit board 40 are arranged side-by-side at intervals along the length of the circuit board 40. Therefore, multiple second conductive screws are typically installed on each circuit board 40, and the spacing of the second conductive screws is reasonably arranged according to the arrangement of the light-emitting elements 50.

[0075] For example, consider a second conductive screw arranged in conjunction with four light-emitting elements 50 to transmit current and control signals to these four light-emitting elements 50. This means that a second conductive screw is installed in the area where every four light-emitting elements 50 are arranged on the circuit board 40. The advantage of this arrangement is that the housing 10 synchronously transmits current and control signals to each second conductive screw. Furthermore, by shortening the distance between the second conductive screw and the light-emitting elements 50, the transmission path of current and control signals between the second conductive screw and the light-emitting elements 50 is shortened, further suppressing power attenuation and ensuring display quality.

[0076] Furthermore, based on any of the above embodiments, the display screen 100 also includes a first wire and a second wire (not shown in the figure). One end of the first wire is connected to the first conductive component 60, and the other end of the first wire is connected to the positive connection terminal 20. One end of the second wire is connected to the first conductive component 60, and the other end of the second wire is connected to the negative connection terminal 30. By using the first wire and the second wire to connect the first conductive component 60 to the positive connection terminal 20 and the negative connection terminal 30, current and control signals can be conducted between the first conductive component 60 and the positive connection terminal 20 and the negative connection terminal 30 through the first wire and the second wire. The connection method is simple and the implementation cost is low.

[0077] Of course, in other optional embodiments, the first conductive component 60 can also be connected to the positive connection terminal 20 and the negative connection terminal 30 through other intermediate media, or the first conductive component 60 can be directly connected to the positive connection terminal 20 and the negative connection terminal 30. The appropriate method can be chosen flexibly according to actual needs.

[0078] To facilitate connection to external power supplies and controllers, in one embodiment, at least a portion of the positive connection terminal 20 and / or the negative connection terminal 30 extends outside the housing 10. This ensures that the positive connection terminal 20 and the negative connection terminal 30 are not interfered with by the housing 10, and that there is sufficient space around them for connection operations.

[0079] Optionally, the positive connection terminal 20 and the negative connection terminal 30 can be connected to the external power supply and the controller by wiring, direct contact, etc., as needed, and no specific limitation is made here.

[0080] Please continue reading. Figure 3 In one embodiment, the housing 10 is recessed to form a receiving groove 11, and the circuit board 40 and at least a portion of the light-emitting element 50 are installed inside the receiving groove 11. On the one hand, the built-in circuit board 40 and light-emitting element 50 avoid protruding from the housing 10 and occupying too much installation space, thus achieving a thinner design for the display screen 100; on the other hand, the built-in circuit board 40 and light-emitting element 50 are protected by the housing 10, thereby avoiding direct exposure to the environment and easy contamination and damage, improving the protective performance of the display screen 100.

[0081] It should be noted that the light-emitting part of the light-emitting body 50 needs to extend outside the slot of the receiving groove 11 to avoid blocking the emitted light, ensure a sufficiently large light-emitting area, and ensure the display effect of the display screen 100.

[0082] In addition, a certain distance can be maintained between the light-emitting element 50 and the housing 10 to form a heat dissipation gap, which helps to dissipate the heat generated by the light-emitting element 50 and / or the circuit board 40 in a timely manner during operation. Of course, the light-emitting element 50 and the housing 10 can also be in close contact, and heat dissipation holes can be opened on the housing 10 to dissipate heat, or both heat dissipation gaps and heat dissipation holes can be provided at the same time; the specific solution can be flexibly selected according to actual needs.

[0083] Furthermore, the housing 10 is made of aluminum profile. The aluminum profile housing 10 not only has excellent electrical conductivity, but also excellent heat dissipation capabilities.

[0084] In addition to the above, this application also provides a display device, which includes a mounting frame and a display screen 100 as described in any of the above embodiments, the display screen 100 being mounted on the mounting frame.

[0085] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0086] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A wiring board, characterized by, It includes a first board layer and a second board layer, which are stacked along the thickness direction of the circuit board. The first board layer is provided with a negative power supply and a signal layer, and the second board layer is provided with a positive power supply layer. Along the thickness direction of the circuit board, the cross-sectional area of ​​the second board layer is larger than that of the first board layer. The first plate is used for electrical connection with the housing, and the first plate and the second plate are used for electrical connection with the light emitter.

2. The circuit board according to claim 1, characterized by The circuit board further includes a third board layer, and the second board layer is stacked between the first board layer and the third board layer. The first board layer and the third board layer are both provided with negative power supply and signal layers, and the second board layer is provided with a positive power supply layer. The first plate, the second plate, and the third plate are all used for electrical connection with the light-emitting element.

3. The circuit board according to claim 2, wherein The second plate layer is provided in at least two, and the at least two second plate layers are stacked between the first plate layer and the third plate layer.

4. The circuit board according to claim 2 or 3, characterized by The first plate has a first connecting through hole, the second plate has a second connecting through hole, and the third plate has a third connecting through hole. An electrical connection structure is provided in the first connecting through hole, the second connecting through hole, and the third connecting through hole so that the first plate and the second plate, as well as the second plate and the third plate, are electrically connected and conductive through the electrical connection structure.

5. A display screen comprising a plurality of display units, characterized in that, The display unit includes: A housing, on which a positive connection terminal and a negative connection terminal are mounted; The circuit board as described in any one of claims 1 to 4, wherein the circuit board is mounted on the housing, and the first board layer is electrically connected to the housing; Multiple light-emitting elements are arranged on the surface of the second board layer opposite to the first board layer, and the light-emitting elements are electrically connected to the circuit board; and A first conductive component is electrically connected to the first plate and the second plate, electrically connected to the housing, and electrically connected to the positive connection terminal and the negative connection terminal.

6. The display screen of claim 5, wherein, The first conductive component uses a first conductive screw. The first plate has a first mounting through hole, the second plate has a second mounting through hole, and the housing has a first threaded hole. The first mounting through hole and the second mounting through hole are aligned with the first threaded hole. The first conductive screw passes through the first mounting through hole and the second mounting through hole, and the first conductive screw is screwed into the first threaded hole. The screw head of the first conductive screw abuts against the second plate.

7. The display screen of claim 5, wherein, The display unit further includes a second conductive component, which is spaced apart on one side of the first conductive component. The second conductive component is electrically connected to the first plate and the second plate, and is also electrically connected to the housing.

8. The display screen of claim 7, wherein, The second conductive component uses a second conductive screw. The first plate has a fourth mounting through hole, the second plate has a fifth mounting through hole, and the housing has a second threaded hole. The fourth and fifth mounting through holes are aligned with the second threaded hole. The second conductive screw passes through the fourth and fifth mounting through holes and is screwed into the second threaded hole. The screw head of the second conductive screw abuts against the second plate.

9. The display screen of claim 5, wherein, The display screen also includes a first wire and a second wire. One end of the first wire is connected to the first conductive component, and the other end of the first wire is connected to the positive connection terminal. One end of the second wire is connected to the first conductive component, and the other end of the second wire is connected to the negative connection terminal.

10. The display screen of claim 5, wherein, At least a portion of the positive connection terminal and / or the negative connection terminal extends outside the housing.

11. The display screen of claim 5, wherein, The housing is recessed to form a receiving groove, and the circuit board and at least part of the light-emitting element are installed inside the receiving groove.

12. The display screen of claim 5, wherein, The housing is made of aluminum profile.

13. A display device, characterized by comprising: include: Mounting framework; as well as The display screen as described in any one of claims 5 to 12, wherein the display screen is mounted on the mounting frame.

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