Spliced display screen

Abstract

The utility model discloses a splicing type display screen. A first lamp bead and a second lamp bead both comprise chip substrates with the same boundary dimension and color developing pixel groups with the same specification. The developing pixel groups are respectively positioned at the same positions of the two chip substrates; each of the first lamp bead and the second lamp bead comprises a power supply positive electrode bonding pad, a power supply negative electrode bonding pad, a signal output bonding pad, a signal input bonding pad and a standby input bonding pad which have the same functions and are electrically connected with the color developing pixel group; in the first lamp bead, each bonding pad is arranged at a specific position of the chip substrate; in the second lamp bead, the mounting positions of the bonding pads on the chip substrate are in central symmetry relative to the positions of the bonding pads in the first lamp bead; the first lamp panel and the second lamp panel are each provided with a PCB, and the PCB of the first lamp panel can be used as the PCB of the second lamp panel after being taken and rotated by 180 degrees. According to the technical scheme, the problem that display chromatic aberration exists between lamp panels is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of display screens, in particular to a spliced ​​display screen. Background Art

[0002] Spliced ​​display screens are usually used in some occasions that require large-screen displays, such as conference reports, large-scale studios, advertising, etc.

[0003] In the prior art, in order to optimize the voltage and signal distribution between the light boards of the spliced ​​display screen, symmetrical splicing is usually adopted between the light boards. However, the symmetrical splicing in the prior art mainly supplies the power signal in two ways to avoid the problem of voltage instability caused by excessive load. However, after adopting the existing symmetrical splicing, people can easily find that there will be obvious color difference between the two symmetrically spliced ​​light boards when displaying images. To address this problem, technicians in this field usually use control software to adjust the color of the light boards. However, this results in the need for separate program debugging of this spliced ​​display screen to make the display effects of the two light boards as consistent as possible, but it is still difficult to adjust to the same display effect. Utility Model Content

[0004] The utility model aims to provide a spliced ​​display screen to solve the problem of obvious color difference between symmetrically spliced ​​light panels on the existing spliced ​​display screen.

[0005] To achieve this purpose, the utility model adopts the following technical solutions:

[0006] A spliced ​​display screen comprises a first light panel and a second light panel which are adjacently spliced;

[0007] The first lamp board includes a plurality of first lamp beads, and the second lamp board includes a plurality of second lamp beads; the first lamp beads and the second lamp beads both include chip substrates with the same external dimensions and color pixel groups with the same specifications; the color pixel groups are respectively located at the same positions of the two chip substrates; the chip substrates of the first lamp beads and the second lamp beads are both provided with a positive power pad, a negative power pad, a signal output pad, a signal input pad, and a spare input pad having the same functions and being electrically connected to the color pixel groups;

[0008] In the first lamp bead, the power positive pad, the power negative pad, the signal output pad, the signal input pad and the spare input pad are respectively arranged at specific positions of the chip substrate;

[0009] In the second lamp bead, the positive power pad, the negative power pad, the signal output pad, the signal input pad and the spare input pad are respectively located at corresponding positions of the chip substrate and their specific positions on the chip substrate of the first lamp bead, which are symmetrical relative to the chip substrate.

[0010] The first lamp board and the second lamp board are both configured with PCB boards. The PCB board of the first lamp board is used for lead connections of the positive power pad, the negative power pad, the signal output pad, the signal input pad and the spare input pad of the first lamp bead; the PCB board of the second lamp board is used for lead connections of the positive power pad, the negative power pad, the signal output pad, the signal input pad and the spare input pad of the second lamp bead; the PCB board of the first lamp board is taken and rotated 180° to be used as the PCB board of the second lamp board.

[0011] In one embodiment, the second lamp bead further includes a first connection structure and a second connection structure, the positive power pad is electrically connected to the color display pixel group through the first connection structure, and the negative power pad is electrically connected to the color display pixel group through the second connection structure, so that the positive power pad and the negative power pad are symmetrical relative to the positive power pad and the negative power pad of the first lamp bead at the center of the installation position of the chip substrate.

[0012] In one embodiment, the first connection structure and / or the second connection structure is a flying wire;

[0013] The first connection structure and / or the second connection structure is a copper foil wire, and the copper foil wire is attached to the surface of the chip substrate.

[0014] In one embodiment, the chip substrate of the second lamp bead further has a first via hole and a second via hole, one end of the first connection structure passes through the first via hole to be electrically connected to the positive power pad, and one end of the second connection structure passes through the second via hole to be electrically connected to the negative power pad.

[0015] In one embodiment, the PCB board of the first light board and the PCB board of the second light board are both provided with a first soldering pad and a second soldering pad having the same function and position, and the first soldering pad is electrically connected to the second soldering pad;

[0016] In the first lamp board, the first soldering pad is connected to the signal input soldering pad in the first lamp bead;

[0017] In the second lamp board, the second soldering pad is connected to the signal input soldering pad in the second lamp bead.

[0018] In one embodiment, the first lamp bead further includes a fifth connecting pad, the fifth connecting pad is electrically connected to the signal input pad, and the position of the fifth connecting pad on the first lamp bead chip substrate is the same as the position of the signal input pad in the second lamp bead.

[0019] In one embodiment, the first lamp bead and the second lamp bead both include driver ICs with the same specifications, and the driver ICs are respectively located at the same positions of the two chip substrates; the positive power pad and the negative power pad are electrically connected to the color pixel group through the driver IC.

[0020] In one embodiment, the color pixel group includes a red pixel, a green pixel, and a blue pixel; and the arrangement positions and arrangement order of the red pixel, the green pixel, and the blue pixel in the two color pixel groups are the same.

[0021] Compared with the prior art, the utility model has the following beneficial effects:

[0022] The technical solution of the utility model is to set two different first lamp beads and second lamp beads; in the same spliced ​​display screen, the chip substrates on the first lamp beads and the second lamp beads have the same external dimensions and the same specifications of the color pixel groups; that is, the size and external contour of the chip substrates are the same, and the size, power and luminous color of the color pixel groups are the same. When the first lamp board and the second lamp board are spliced, the color pixel groups on the first lamp board are in the same position, so that there is no color difference between the first lamp board and the second lamp board of the spliced ​​display screen, solving the problem of obvious color difference in the existing spliced ​​display screen.

[0023] Furthermore, after the two light boards of an ordinary spliced ​​display screen are symmetrically spliced, the two light boards are powered by two ends. The specific method is to rotate the PCB board and the lamp beads on one light board 180° together and then splice them with the other light board, thereby avoiding the problem of unstable voltage and uneven brightness of the lamp beads caused by excessive load on the lamp beads when the entire light board is powered.

[0024] It should also be noted that the first lamp bead and the second lamp bead usually have five types of pads, including a positive power pad (VDD) and a negative power pad (GND) for power supply, a signal output pad (DO) for transmitting digital signals, a signal input pad (DIN), and a spare input pad (FDIN). When transmitting power signals, the power supplies of each first lamp bead and each second lamp bead are connected in parallel. However, when transmitting digital signals, such as Figure 7As shown, the first lamp beads and the second lamp beads are connected in series in sequence, and the digital signal transmission relationship between the lamp beads can only be that the signal is input from the signal input pad (DIN) of the first lamp bead and the signal is output from the signal output pad (DO) of the first lamp bead, and the signal is input from the signal input pad (DIN) of the second lamp bead and the signal is output from the signal output pad (DO) of the second lamp bead, and the transmission direction of the digital signal is unidirectional.

[0025] The technical solution of the utility model retains the beneficial effect of double-end power supply in the background technical solution and achieves the beneficial effect that the PCB boards used by the first lamp board and the second lamp board are substantially the same, by setting the respective soldering pads of the first lamp bead or the second lamp bead to be symmetrical with respect to the center of the soldering pad on the other lamp bead. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0027] The structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification so as to facilitate understanding and reading by persons familiar with this technology. They are not used to limit the conditions under which the present invention can be implemented, and therefore have no substantive technical significance. Any structural modification, change in proportion or adjustment of size, without affecting the effects and purposes that can be achieved by the present invention, should still fall within the scope of the technical contents disclosed by the present invention.

[0028] Figure 1 It is a structural schematic diagram of the background technology of the utility model;

[0029] Figure 2 It is a structural schematic diagram of the background technology of the utility model;

[0030] Figure 3 3a is a front view of the first lamp bead, and 3b is a back view of 3a;

[0031] Figure 4 4a is a front view of the second lamp bead, and 4b is a back view of 4a;

[0032] Figure 5 is a structural schematic diagram of an embodiment of a first light board;

[0033] Figure 6 is a structural schematic diagram of an embodiment of a second light board;

[0034] Figure 7 It is a structural schematic diagram of an embodiment of a spliced ​​display screen;

[0035] Figure 8 This is the PCB circuit schematic diagram of the first light board;

[0036] Fig. 9 This is the schematic diagram of the PCB circuit of the second light board;

[0037] Illustrations: 2000, spliced ​​display screen; 200a, first lamp board; 20a, first lamp bead; 21a, chip substrate; 22a, positive power pad; 23a, negative power pad; 24a, signal output pad; 25a, spare input pad; 26a, signal input pad; 27a, driver IC; 28a, color pixel group; 29a, fifth connection pad; 201, PCB board of the first lamp board; 2011, first pad; 2012, second pad; 200b, second lamp board;

[0038] 20b, second lamp bead; 21b, chip substrate; 22b, positive power pad; 221b, first connection structure; 23b, negative power pad; 231b, second connection structure; 24b, signal output pad; 25b, spare input pad; 26b, signal input pad; 27b, driver IC; 28b, color pixel group; 281b, red pixel; 282b, green pixel; 283b, blue pixel; 291b, first via hole; 292b, second via hole; 202, PCB board of second lamp board; 2021, first pad; 2022, second pad;

[0039] 10. Light board; 10′ another light board; DETAILED DESCRIPTION

[0040] In order to make the technical purpose, features and advantages of the utility model more obvious and easy to understand, the technical scheme in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the embodiment described below is only a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0041] In the description of the present invention, it should be understood that the terms "upper", "lower", "top", "bottom", "inside", "outside", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. It should be noted that when a component is considered to be "connected" to another component, it may be directly connected to the other component or there may be a centrally arranged component at the same time.

[0042] The technical solution of the utility model is further explained below with reference to the accompanying drawings and through specific implementation methods.

[0043] See also Figure 1 and Figure 2 In the prior art, in order to optimize the voltage and signal distribution between the light boards 10 of the spliced ​​display screen, the light board 10 and another light board 10' are usually spliced ​​symmetrically. However, the symmetrical splicing method in the prior art mainly divides the power supply signal into multiple supply paths to avoid the problem of voltage instability caused by excessive load. However, after adopting the existing symmetrical splicing method, since the arrangement of the color display pixels of each lamp bead on the light board 10 is the same, such as Figure 1 As shown, after the light board 10 is arranged symmetrically relative to another light board 10', the color display pixels of the lamp beads in the two adjacent light boards 10 are arranged in a central symmetrical distribution (such as Figure 2 As shown in the figure, for example, the color display pixels of the lamp beads in one lamp board 10 are arranged from top to bottom as green pixels 12, red pixels 11, and blue pixels 13, and the color display pixels on another symmetrically spliced ​​lamp board 10 are arranged from top to bottom as blue pixels 13, red pixels 11, and green pixels 12. At the same horizontal position, the lamp beads on one side will be green pixels, and the lamp board 10 on the other side will be blue pixels 13, resulting in obvious color difference when the two relatively spliced ​​lamp boards 10 display images.

[0044] The embodiment of the utility model provides a spliced ​​display screen 2000 .

[0045] See also Figures 3 to 9 In one embodiment, the spliced ​​display screen 2000 includes adjacently spliced ​​first light panels 200a and second light panels 200b;

[0046] The first lamp board 200a includes a plurality of first lamp beads 20a, and the second lamp board 200b includes a plurality of second lamp beads 20b; the first lamp beads 20a and the second lamp beads 20b both include chip substrates 21b / 21a and color pixel groups 28b / 28a of the same specifications; the color pixel groups 28b / 28a are respectively located at the same positions of the two chip substrates 21b / 21a; the first lamp beads 20a and the second lamp beads 20b both include power positive pads 22b / 22a, power negative pads 23b / 23a, signal output pads 24b / 24a, signal input pads 26b / 26a, and spare input pads 25b / 25a, which have the same functions and are electrically connected to the color pixel groups;

[0047] In the first lamp bead 20a, the positive power pad 22a, the negative power pad 23a, the signal output pad 24a, the signal input pad 26a and the spare input pad 25a are respectively arranged at specific positions of the chip substrate 21a;

[0048] In the second lamp bead 20b, the positive power pad 22b, the negative power pad 23b, the signal output pad 24b, the signal input pad 26b and the spare input pad 25b are respectively located at corresponding positions of the chip substrate 21b and its specific position on the chip substrate 21a of the first lamp bead 20a, which are symmetrical relative to the center of the chip substrate 21b;

[0049] The first lamp board and the second lamp board are both configured with PCB boards. The PCB board of the first lamp board is used for the lead connection of the positive power pad 22a, the negative power pad 23a, the signal output pad 24a, the signal input pad 26a and the spare input pad 25a of the first lamp bead; the PCB board of the second lamp board is used for the lead connection of the positive power pad 22b, the negative power pad 23b, the signal output pad 24b, the signal input pad 26b and the spare input pad 25b of the second lamp bead; the PCB board 201 of the first lamp board is taken and rotated 180°, and can be used as the PCB board 202 of the second lamp board.

[0050] It can be understood that the technical solution of the utility model is to set two different first lamp beads 20a and second lamp beads 20b; in the same spliced ​​display screen 2000, the chip substrates 21b / 21a on the first lamp beads 20a and the second lamp beads 20b have the same external dimensions and the same specifications of the color pixel groups 28b / 28a; that is, the size and external contour of the chip substrates 21b / 21a are the same, and the size, power and luminous color of the color pixel groups 28b / 28a are the same. When the first lamp board 200a and the second lamp board 200b are spliced, the color pixel groups 28a on the first lamp board 200a and the color pixel groups 28b on the second lamp board 200b are in the same position, so that there is no color difference between the first lamp board 200a and the second lamp board 200b of the spliced ​​display screen 2000, which solves the problem of obvious color difference in the existing spliced ​​display screen 2000.

[0051] Furthermore, after two lamp boards of an ordinary spliced ​​display screen are symmetrically spliced, the two lamp boards are powered by two ends. The specific method is to rotate the PCB board on one lamp board 10 and the lamp beads on one lamp board 10 together by 180° and then splice them with another lamp board 10′, thereby avoiding the problem of unstable voltage and uneven brightness of the lamp beads caused by excessive load on the lamp beads when the entire lamp board is powered.

[0052] It should also be noted that the first lamp bead and the second lamp bead usually have five types of pads, including a positive power pad (VDD) and a negative power pad (GND) for power supply, a signal output pad (DO) for transmitting digital signals, a signal input pad (DIN), and a spare input pad (FDIN). When transmitting power signals, the power supplies of each first lamp bead and each second lamp bead are connected in parallel. However, when transmitting signals, Figure 7 As shown, the first lamp beads and the second lamp beads are connected in series in sequence, and the digital signal transmission relationship between the lamp beads can only be that the signal is input from the signal input pad (DIN) of the first lamp bead and the signal is output from the signal output pad (DO) of the first lamp bead, and the signal is input from the signal input pad (DIN) of the second lamp bead and the signal is output from the signal output pad (DO) of the second lamp bead, and the transmission direction of the digital signal is unidirectional.

[0053] Furthermore, in order to retain the beneficial effects of the double-end power supply in the background technology solution and to achieve symmetry and the sameness of the PCB boards used respectively between the first lamp board 200a and the second lamp board 200b.

[0054] In the second lamp bead 20b, the positive power pad 22b, the negative power pad 23b, the signal output pad 24b, the signal input pad 26b and the spare input pad 25b are respectively located at corresponding positions of the chip substrate 21b and its specific position on the chip substrate 21a of the first lamp bead 20a, which are symmetrical relative to the center of the chip substrate 21b; the first lamp board and the second lamp board are both configured with PCB boards, and the PCB board of the first lamp board is used for the lead connection of the positive power pad 22a, the negative power pad 23a, the signal output pad 24a, the signal input pad 26a and the spare input pad 25a of the first lamp bead; the PCB board of the second lamp board is used for the lead connection of the positive power pad 22b, the negative power pad 23b, the signal output pad 24b, the signal input pad 26b and the spare input pad 25b of the second lamp bead; the PCB board 201 of the first lamp board is taken and rotated 180°, and can be used as the PCB board 202 of the second lamp board.

[0055] Specifically, when the circuit routing of the PCB board 201 of the first lamp board does not change, the PCB board 201 of the first lamp board is rotated 180 degrees to be used as the PCB board 202 of the second lamp board, thereby achieving the beneficial effect that the PCB boards used by the first lamp board 200a and the second lamp board 200b are substantially the same. That is to say, when manufacturing PCB boards, only one type of routing form needs to be manufactured.

[0056] See also Figure 4 In a specific embodiment of the utility model, in the second lamp bead 20b, the second lamp bead 20b also includes a first connection structure 221b and a second connection structure 231b, the positive power pad 22b is electrically connected to the color pixel group through the first connection structure 221b, and the negative power pad 23b is electrically connected to the color pixel group 28b through the second connection structure 231b, so that the installation position of the positive power pad 22b and the negative power pad 23b on the chip substrate 21b is symmetrical relative to the position center of the positive power pad 22a and the negative power pad 23a in the first lamp bead 20a.

[0057] It can be understood that the position center symmetry of the positive power pad 22b and the negative power pad 23b in the second lamp bead 20b relative to the positive power pad 22a and the negative power pad 23a in the first lamp bead 20a is achieved by setting the first connection structure 221b and the second connection structure 231b.

[0058] It should also be noted that in the above technical solution, since the positions of the corresponding color pixel groups 28b / 28a on the chip substrate 21b / 21a / are the same, the same process parameters or the same processing equipment can be used when packaging the color pixel groups 28b / 28a, thereby saving production and processing costs. On the other hand, since the electrical connection relationship between the positive power pad 22b / 22a and the negative power pad 23b / 23a on the first lamp bead 20a and the second lamp bead 20b and the color pixel group 28b / 28a is different, it is necessary to process the first connection structure 221b and the second connection structure 231b separately on the chip substrate 21b used for the second lamp board 200b, but the manufacturing process of the first connection structure 221b and the second connection structure 231b belongs to a different process from packaging the color pixel group 28b on the chip substrate 21b. Therefore, the technical solution of the utility model solves the technical problems pointed out in the background technology at a relatively low cost.

[0059] Of course, the signal output pad 24b and the spare signal input pad 25b can also be implemented using the third connection structure or the fourth connection structure, and the signal output pad 24b and the spare signal input pad 25b on the chip substrate of the second lamp bead are symmetrical with respect to the signal output pad 24a and the spare signal input pad 25a on the chip substrate of the first lamp bead. Specifically, the signal output pad 24b is electrically connected to the color pixel group through the third connection structure, and the spare signal input pad 25b is electrically connected to the color pixel group 28b through the fourth connection structure.

[0060] Preferably, a plurality of first lamp beads 20a are distributed on the PCB board 201 of the first lamp board in an evenly spaced rectangular array; a plurality of second lamp beads 20b are distributed on the PCB board 202 of the second lamp board in an evenly spaced rectangular array.

[0061] In one embodiment of the present utility model, the first connection structure 221b and / or the second connection structure 231b are flying wires;

[0062] The first connection structure 221b and / or the second connection structure 231b are copper foil wires, and the copper foil wires are attached to the surface of the chip substrate 21b21a.

[0063] It is understandable that the above-mentioned flying wire refers to a wire wrapped by an insulating material. The above-mentioned copper foil wire is a copper foil wire formed by using a printed circuit board etching technology.

[0064] Furthermore, if Figure 4 As shown, the chip substrate of the second lamp bead 20b also has a first via 291b and a second via 292b, one end of the first connection structure 221b passes through the first via 291b to be electrically connected to the positive power pad 22b, and one end of the second connection structure 231b passes through the second via 292b to be electrically connected to the negative power pad 23b.

[0065] Specifically, when the first connection structure 221 b is a conductive line, the conductive line may pass through the first via hole 291 b .

[0066] When the first connection structure 221b is a copper foil line, the surface of the first via 291b is attached with copper foil. It can be understood that the arrangement of the first via 291b and the second via 292b simplifies the layout of the first connection structure 221b and the second connection structure 231b on the chip substrate 21b, saving processing costs.

[0067] See also Figure 8 and Fig. 9 The PCB board 201 of the first light board and the PCB board 202 of the second light board are both provided with a first soldering pad 2011 / 2021 and a second soldering pad 2012 / 2022 having the same function and position, and the first soldering pad 2011 / 2021 is electrically connected to the second soldering pad 2012 / 2022;

[0068] In the first lamp board 200a, the first soldering pad 2011 is connected to the signal input soldering pad 24a in the first lamp bead 20a;

[0069] In the second lamp board 200b, the second pad 2022 is connected to the signal input pad 24b in the second lamp bead 20b.

[0070] Furthermore, the first lamp bead 20a also includes a fifth connecting pad 29a, which is electrically connected to the signal input pad 24a, and the position of the fifth connecting pad 29a on the chip substrate 21a of the first lamp bead 20a is the same as the position of the signal input pad 24b in the second lamp bead 20b.

[0071] See also Figure 3 and Figure 4 The first lamp bead 20a and the second lamp bead 20b both include a driving IC 27b / 27a of the same specification, and the driving IC 27b / 27a is respectively located at the same position of the two chip substrates 21b / 21a; the positive power pad 22b / 22a and the negative power pad 23b / 23a are electrically connected to the color pixel group 28b / 28a through the driving IC 27b / 27a.

[0072] It can be understood that in order to save costs and avoid color difference between the first light board 200a and the second light board 200b, the driver IC 27b / 27a is located at the same position of the two chip substrates 21b / 21a.

[0073] Please continue reading Figure 3 and Figure 4The color pixel group 28b / 28a includes red pixels 281ba / 281b, green pixels 282a / 282b, and blue pixels 283a / 283b. The arrangement positions and arrangement orders of the red pixels 281ba / 281b, green pixels 282a / 282b, and blue pixels 283a / 283b in the two color pixel groups 28b / 28a are the same.

[0074] Optionally, the color pixel group 28b / 28a may also consist of only red pixels 281b or green pixels 282b or blue pixels 283b or white pixels.

[0075] As described above, the above embodiments are only used to illustrate the technical solutions of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments can still be modified, or some of the technical features can be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the utility model.

Claims

1. A spliced ​​display screen, characterized in that: It includes a first light panel and a second light panel which are adjacently spliced; The first lamp board includes a plurality of first lamp beads, and the second lamp board includes a plurality of second lamp beads; the first lamp beads and the second lamp beads both include chip substrates with the same external dimensions and color pixel groups with the same specifications; the color pixel groups are respectively located at the same positions of the two chip substrates; the chip substrates of the first lamp beads and the second lamp beads are both provided with a positive power pad, a negative power pad, a signal output pad, a signal input pad, and a spare input pad having the same functions and being electrically connected to the color pixel groups; In the first lamp bead, the power positive pad, the power negative pad, the signal output pad, the signal input pad and the spare input pad are respectively arranged at specific positions of the chip substrate; In the second lamp bead, the power positive pad, the power negative pad, the signal output pad, the signal input pad and the spare input pad are respectively located at corresponding positions of the chip substrate and a specific position thereof on the chip substrate of the first lamp bead, which are symmetrical relative to the center of the chip substrate; The first lamp board and the second lamp board are both configured with PCB boards. The PCB board of the first lamp board is used for lead connections of the positive power pad, the negative power pad, the signal output pad, the signal input pad and the spare input pad of the first lamp bead; the PCB board of the second lamp board is used for lead connections of the positive power pad, the negative power pad, the signal output pad, the signal input pad and the spare input pad of the second lamp bead; the PCB board of the first lamp board is taken and rotated 180°, and can be used as the PCB board of the second lamp board.

2. The spliced ​​display screen according to claim 1, characterized in that: The second lamp bead also includes a first connecting structure and a second connecting structure, the positive power pad is electrically connected to the color display pixel group through the first connecting structure, and the negative power pad is electrically connected to the color display pixel group through the second connecting structure, so that the positive power pad and the negative power pad are symmetrical relative to the positive power pad and the negative power pad of the first lamp bead at the center of the installation position of the chip substrate.

3. The spliced ​​display screen according to claim 2, characterized in that: The first connection structure and / or the second connection structure is a flying line; The first connection structure and / or the second connection structure is a copper foil wire, and the copper foil wire is attached to the surface of the chip substrate.

4. The spliced ​​display screen according to claim 2, characterized in that: The chip substrate of the second lamp bead also has a first via hole and a second via hole, one end of the first connection structure passes through the first via hole to be electrically connected to the positive power pad, and one end of the second connection structure passes through the second via hole to be electrically connected to the negative power pad.

5. The spliced ​​display screen according to claim 1, characterized in that: The PCB board of the first light board and the PCB board of the second light board are both provided with a first soldering pad and a second soldering pad having the same function and position, and the first soldering pad is electrically connected to the second soldering pad; In the first lamp board, the first soldering pad is connected to the signal input soldering pad in the first lamp bead; In the second lamp board, the second soldering pad is connected to the signal input soldering pad in the second lamp bead.

6. The spliced ​​display screen according to claim 5, characterized in that: The first lamp bead also includes a fifth connecting pad, which is electrically connected to the signal input pad, and the position of the fifth connecting pad on the first lamp bead chip substrate is the same as the position of the signal input pad in the second lamp bead.

7. The spliced ​​display screen according to claim 1, characterized in that: The first lamp bead and the second lamp bead both include driver ICs with the same specifications, and the driver ICs are respectively located at the same positions of the two chip substrates; the positive power pad and the negative power pad are electrically connected to the color pixel group through the driver IC.

8. The spliced ​​display screen according to claim 1, characterized in that: The color pixel group includes red pixels, green pixels, and blue pixels; and the arrangement positions and arrangement order of the red pixels, the green pixels, and the blue pixels in the two color pixel groups are the same.

Images