LED carrier plate and display device

Abstract

The utility model discloses an LED carrier plate and a display device, the LED carrier plate is formed by combining a plurality of carrier plate units, each carrier plate unit comprises a hollow area and a solid area, the hollow areas at the corresponding positions of the adjacent carrier plate units can be combined to form a complete through hole, the back surface of the solid area of each carrier plate unit is provided with a first kind of sub-connecting lines, and the first kind of sub-connecting lines are connected with the solid area of each carrier plate unit. A plurality of first-class sub-connecting lines are combined and conducted to form first-class connecting lines, a plurality of carrier plate units are arranged and combined to form the LED carrier plate conducted by the first-class connecting lines, and due to the arrangement of thickened metal circuits of the first-class connecting lines, the technical problems that in the prior art, due to the fact that circuits are too long and voltage is attenuated, the brightness of far-end LEDs is weakened, and colors are distorted are solved. According to the utility model, the problem of unbalanced LED color display caused by inconsistent RGB arrangement of two adjacent lamp beads in the prior art is also solved, and the improvements provide possibility for realizing a large-size and high-performance LED screen.

Description

Technical Field

[0001] The utility model relates to the technical field of LED display, in particular to an LED carrier board and a display device. Background Art

[0002] The present technical solution relates to a transparent LED display device, such as an LED transparent screen. Common LED transparent screens in the prior art are LED line screens, which consist of rows of LED display strips and a supporting assembly. The prior art also discloses a perforated LED transparent screen, such as patent document CN114863868A, which discloses an LED carrier board and display device thereof, which can achieve LED transparent display. However, in order to achieve a better transparent display effect, the perforated transparent screen often has a small spacing between holes, resulting in less wiring space, which limits the overcurrent capacity of the circuit. This results in attenuation of light emission at the far end of the transparent screen, resulting in uneven color and brightness. This also limits the implementation of large transparent screen solutions.

[0003] In addition, the RGB arrangement of two adjacent lamp beads in the wiring structure of the prior art is inconsistent (such as Figure 14 ), this inconsistency will inevitably lead to inconsistent color display of the lamp beads, and the human eye can easily identify this display inconsistency, so the wiring structure in the prior art has a greater impact on the visual effect. Utility Model Content

[0004] In view of the above deficiencies in the prior art, the present utility model discloses three technical solutions.

[0005] The first technical solution is an LED carrier board. This technical solution records a thickened metal circuit with strong overcurrent capability, which solves the technical problem of uneven color and brightness of LED display due to poor overcurrent capability.

[0006] The second technical solution is an LED carrier board. The LED carrier board recorded in this technical solution is different from the wiring structure of the existing technology. Under the wiring structure of this technical solution, the RGB arrangement inside all lamp beads (or LED light-emitting bodies) is the same, so there is no problem of inconsistent color display of the lamp beads.

[0007] The third technical solution is a display device including the first technical solution or the second technical solution.

[0008] The first technical solution of the present utility model: an LED carrier board, which is composed of a plurality of carrier board units, wherein the carrier board units include a hollow area and a solid area. When the plurality of carrier board units are combined, the hollow areas at corresponding positions of adjacent carrier board units can be combined to form a complete through hole.

[0009] Furthermore, a first type of sub-connection line is provided on the back of the physical area of ​​the carrier unit, and a plurality of first type sub-connection lines are combined and conducted to form a first type of connection line, and a plurality of the carrier units are arranged and combined to form an LED carrier with a first type of connection line conducted.

[0010] The first type of connecting wire is used for power supply, and its thickness h is ≥ 213 μm.

[0011] In this technical solution, the value range of the thickness h of the first type of connecting wire is determined by the following formula:

[0012]

[0013] ρ is the resistivity of the material of the first type of connecting wire, L is the length of the first type of connecting wire, R is the resistance value of the first type of connecting wire, S1 is the total hollow area of ​​a single carrier unit, T is the physical transmittance of the LED carrier, r1 is the horizontal length from the center point of the through hole to the edge of the through hole, r2 is the vertical length from the center point of the through hole to the edge of the through hole, A is the ratio of the longitudinal straight side length b to the transverse straight side length a of the solid area, w is the width of the first type of connecting wire, θ is the visible light transmittance angle, d is the thickness of the physical area of ​​the carrier unit, where 0.2 mm ≤ r1 ≤ 20 mm, 0.2 mm ≤ r2 ≤ 20 mm, 0.5 ≤ a ≤ 5 mm, and 0.5 ≤ b ≤ 5 mm.

[0014] In a further technical solution, expansion portions are provided on both sides of the first type of sub-connection lines, and the area of ​​the first type of sub-connection lines is smaller than the area of ​​the solid area and does not block the hollow area.

[0015] When the extension portions are provided on both sides of the first-type sub-connection line, the value range of the thickness h of the first-type sub-connection line is determined by the following formula:

[0016]

[0017] ρ is the resistivity of the material of the first type of connecting wire, L is the length of the first type of connecting wire, R is the resistance value of the first type of connecting wire, S1 is the total hollow area of ​​a single carrier unit, T is the physical transmittance of the LED carrier, r1 is the horizontal length from the center point of the through hole to the edge of the through hole, r2 is the vertical length from the center point of the through hole to the edge of the through hole, A is the ratio of the longitudinal straight side length b to the transverse straight side length a of the solid area, W1 is the width of the equivalent circuit of the first type of connecting wire set in the expansion part, w 最大 is the maximum width of the first type of connecting line, θ is the visible light transmittance angle, d is the thickness of the physical area of ​​the carrier unit, where 0.2 mm ≤ r1 ≤ 20 mm, 0.2 mm ≤ r2 ≤ 20 mm, 0.5 ≤ a ≤ 5 mm, and 0.5 ≤ b ≤ 5 mm.

[0018] In this technical solution, the transverse side length of the carrier unit is a+2*r1, the longitudinal side length of the carrier unit is b+2*r2, and the ratio of the transverse side length to the longitudinal side length of the carrier unit is in the range of:

[0019] Furthermore, the value range of θ is: 90°≤θ≤154°.

[0020] The second technical solution of the present invention is an LED carrier board, which is composed of a plurality of carrier board units, and the carrier board units include a first carrier board unit and a second carrier board unit.

[0021] The first type of sub-connection line on the back side of the physical area of ​​the first carrier unit is a VDD power supply line, and the first type of sub-connection line on the back side of the physical area of ​​the second carrier unit is a GND line.

[0022] In this technical solution, multiple first carrier board units are combined to form a first sub-LED carrier board in which a row or a column of VDD power supply lines are connected to data signal lines; multiple second carrier board units are combined to form a second sub-LED carrier board in which a row or a column of GND lines are connected to data signal lines. The first sub-LED carrier board and the second sub-LED carrier board are arranged and combined to form the LED carrier board.

[0023] In a more preferred technical solution, the first sub-LED carrier board and the second sub-LED carrier board are alternately arranged and combined to form the LED carrier board.

[0024] In this technical solution, a first electrode pin, a second electrode pin and a third electrode pin are provided on the front of the LED carrier board. The first electrode pin is electrically connected to the VDD power supply line, the second electrode pin is electrically connected to the GND line, and the third electrode pin is electrically connected to the data signal line; a first branch line is provided on the first sub-LED carrier board, and a second branch line is provided on the second sub-LED carrier board.

[0025] One end of the first branch line is electrically connected to the second electrode pin on the first sub-LED carrier, and the other end is electrically connected to the GND line on the back of the adjacent second sub-LED carrier through a via; one end of the second branch line is electrically connected to the first electrode pin on the second sub-LED carrier, and the other end is electrically connected to the VDD power supply line on the back of the adjacent first sub-LED carrier through a via.

[0026] Furthermore, the second electrode pin of each first carrier unit in the first sub-LED carrier is electrically connected to one of the first branch lines, or multiple first carrier units in the first sub-LED carrier are grouped together, and the second electrode pins in the same group are electrically connected and then electrically connected to one of the first branch lines.

[0027] The first electrode pin of each second carrier unit in the second sub-LED carrier is electrically connected to one of the second branch lines, or multiple second carrier units in the second sub-LED carrier are grouped together, and the first electrode pins in the same group are electrically connected and then electrically connected to one of the second branch lines.

[0028] In this technical solution, the value range of the thickness h of the first type of connecting wire is determined by the following formula:

[0029]

[0030] ρ is the resistivity of the material of the first type of connecting wire, L is the length of the first type of connecting wire, R is the resistance value of the first type of connecting wire, S1 is the total hollow area of ​​a single carrier unit, T is the physical transmittance of the LED carrier, r1 is the horizontal length from the center point of the through hole to the through hole edge, r2 is the vertical length from the center point of the through hole to the through hole edge, A is the ratio of the longitudinal straight side length b of the solid area to the transverse straight side length a, w is the width of the first type of connecting wire, θ is the visible light transmittance angle, d is the thickness of the physical area of ​​the carrier unit, where 0.2 mm ≤ r1 ≤ 20 mm, 0.2 mm ≤ r2 ≤ 20 mm, 0.5 ≤ a ≤ 5 mm, and 0.5 ≤ b ≤ 5 mm.

[0031] When the first-type sub-connection line is provided with expansion portions on both sides, the value range of the first-type connection line h is determined by the following formula:

[0032]

[0033] ρ is the resistivity of the material of the first type of connecting wire, L is the length of the first type of connecting wire, R is the resistance value of the first type of connecting wire, S1 is the total hollow area of ​​a single carrier unit, T is the physical transmittance of the LED carrier, r1 is the horizontal length from the center point of the through hole to the edge of the through hole, r2 is the vertical length from the center point of the through hole to the edge of the through hole, A is the ratio of the longitudinal straight side length b to the transverse straight side length a of the physical area, W1 is the width of the equivalent circuit of the first type of connecting wire set in the expansion part, w 最大 is the maximum width of the first type of connecting line, θ is the visible light transmittance angle, d is the thickness of the physical area of ​​the carrier unit, where 0.2 mm ≤ r1 ≤ 20 mm, 0.2 mm ≤ r2 ≤ 20 mm, 0.5 ≤ a ≤ 5 mm, and 0.5 ≤ b ≤ 5 mm.

[0034] Furthermore, the value range of θ is: 90°≤θ≤154°.

[0035] In this technical solution, a fourth electrode pin is provided on the front side of the physical area of ​​the carrier unit, and the fourth electrode pin is electrically connected to the second type of sub-connection line. The second type of sub-connection line includes an interruption port, and the interruption port of the second type of sub-connection line is provided between the third electrode pin and the fourth electrode pin.

[0036] A fifth electrode pin and a sixth electrode pin are disposed on the front surface of the physical area of ​​the carrier unit, and the second type of connection lines include a first data signal line and a second data signal line.

[0037] The third electrode pin and the fourth electrode pin are electrically connected to the first data signal line, and the fifth electrode pin and the sixth electrode pin are electrically connected to the second data signal line; the second data signal line includes an interrupt port, and the interrupt port of the second data signal line is set between the fifth electrode pin and the sixth electrode pin.

[0038] The carrier unit further includes a third branch line, which is arranged on the front side of the physical area of ​​the carrier unit. One end of the third branch line is electrically connected to the third electrode pin, and the other end of the third branch line is electrically connected to the sixth electrode pin.

[0039] The third technical solution of the present invention is a display device including the first technical solution or the second technical solution.

[0040] The utility model provides an LED carrier board and display device to solve the technical problem in the prior art that inconsistent RGB arrangement of two adjacent lamp beads leads to inconsistent LED color display. The first type of connecting wire in this technical solution is a thickened metal circuit with strong overcurrent capability, which solves the technical problem in the prior art that the remote LED brightness is weakened and the color is distorted due to voltage attenuation due to excessively long circuits. These improvements make it possible to achieve large-size and high-performance transparent screens. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Figure 1 This is a structural diagram of a carrier board unit in an LED carrier board of the present invention;

[0042] Figure 2 This is a structural diagram of an LED carrier board of the utility model, which is composed of multiple carrier board units;

[0043] Figure 3This is a structural diagram of a first type of sub-connection line arranged on the back of a physical area of ​​a carrier unit in an LED carrier of the present invention;

[0044] Figure 4 This is a schematic diagram of an embodiment of the utility model in which the through hole in the LED carrier is a regular hexagon;

[0045] Figure 5 This is another structural diagram of an LED carrier board of the present invention in which a first type of sub-connection line is arranged on the back of the physical area of ​​the carrier board unit;

[0046] Figure 6 This is a structural diagram of an LED carrier board of the present invention, in which a second type of sub-connecting wires, electrode pins and LED illuminants are arranged on the front side of the physical area of ​​the carrier board unit;

[0047] Figure 7 This is a schematic diagram showing the relationship between the visible light transmittance angle of the transverse cross section of a carrier unit and the thickness of the first type of connecting wire in an LED carrier of the present invention;

[0048] Figure 8 This is a structural diagram of a second type of connecting wire formed by combining and conducting the second type of sub-connecting wires in an LED carrier board of the present invention;

[0049] Figure 9 This is a schematic structural diagram of a plurality of carrier board units arranged and combined in an LED carrier board of the present invention to form a first type of connecting wire to conduct to the back of the LED carrier board;

[0050] Figure 10 This is a structural diagram of an expansion portion of a first-type sub-connection line in an LED carrier board of the present invention;

[0051] Figure 11 This is a schematic diagram of the relative positions of the expansion portion and the physical area of ​​the carrier unit in an LED carrier of the present invention;

[0052] Figure 12 This is a structural diagram of a first type of connecting wire with an expansion portion in an LED carrier board of the present invention;

[0053] Figure 13 This is a schematic structural diagram of an embodiment of an LED carrier board of the present utility model;

[0054] Figure 14 This is a schematic diagram of the structure in which an LED light-emitting body is arranged on an LED carrier board in the prior art;

[0055] Figure 15 This is a schematic structural diagram of an embodiment of an LED carrier board of the present invention, in which a first sub-LED carrier board and a second sub-LED carrier board are alternately arranged and combined to form an LED carrier board, and a connection method of a first branch line and a second branch line;

[0056] Figure 16 This is a structural diagram of an embodiment of a connection method between the first carrier unit and the second carrier unit and the first branch line and the second branch line in an LED carrier of the utility model;

[0057] Figure 17 This is a structural diagram of an embodiment of a connection method of two first carrier board units and two second carrier board units, and a first branch line and a second branch line in an LED carrier board of the present invention;

[0058] Figure 18 This is a schematic structural diagram of an embodiment of an LED carrier board of the present invention, in which the first sub-LED carrier board and the second sub-LED carrier board are alternately arranged and combined to form an LED carrier board, and another connection method of the first branch line and the second branch line;

[0059] Figure 19 This is a structural diagram of an embodiment of a connection method of two first carrier board units and one second carrier board unit, as well as a first branch line and a second branch line in an LED carrier board of the present invention;

[0060] Figure 20 This is a schematic structural diagram of an embodiment of an LED carrier board of the present invention, in which a first sub-LED carrier board and two second sub-LED carrier boards are alternately arranged and combined to form an LED carrier board, and a connection method of a first branch line and a second branch line;

[0061] Figure 21 This is a schematic structural diagram of an embodiment of the present invention in which a fourth electrode pin and an interrupt port are provided in an LED carrier board;

[0062] Figure 22 This is a structural diagram of the second type of sub-connection wires in an LED carrier board of the present invention;

[0063] Figure 23 This is a schematic structural diagram of an embodiment of the present invention in which a fifth electrode pin, a sixth electrode pin, and an interruption port are provided in an LED carrier board;

[0064] Figure 24 This is a structural schematic diagram of a first data signal line and a second data signal line in an LED carrier board of the present invention. DETAILED DESCRIPTION

[0065] The present invention will be further described in detail below with reference to the accompanying drawings.

[0066] To better illustrate this embodiment, some components in the drawings may be omitted, enlarged, or reduced, and do not represent the actual dimensions of the product. Those skilled in the art will understand that some well-known structures and their descriptions are omitted in the drawings. The same or similar reference numerals correspond to the same or similar components.

[0067] There are many existing solutions for achieving transparent LED screens, such as line screens and grid screens. Patent CN114863868B also discloses a perforated LED carrier board. This board is made of a single PCB with regular transparent holes. LED illuminators are placed in the solid area. The LED carrier board, LED illuminators, and controller form a complete transparent LED screen, thus achieving a transparent visual effect.

[0068] The standard design specification for printed circuit boards, IPC-2152, issued by the International Association for Printed Circuits (IPC), stipulates that the thickness range of the inner copper foil (copper cladding) is 0.5-4oz (oz is ounce, 1oz equals 35μm), and the thickness range of the outer copper foil (copper cladding) is 0.5-6oz. In other words, the design range of the thickness of the inner copper foil (copper cladding) is 0.17-140μm, and the design range of the thickness of the outer copper foil (copper cladding) is 0.17-210μm. In the existing technology, the commonly used thicknesses of copper foil (copper cladding) are 35μm, 50μm, and 70μm. Generally, the copper foil (copper cladding) thickness of single-sided and double-sided PCB boards is 35μm. The surface thickness of multi-layer boards is generally 35μm, and the inner layer is 17μm.

[0069] Patent CN114863868B describes circuit thicknesses ranging from 17μm to 70μm. However, these circuits are too thin to effectively handle overcurrent. When the circuits are too long, the voltage will significantly decay, ultimately causing dimming and color distortion of the LEDs at the far end. Furthermore, overly long circuits can cause overheating, hindering the development of large-scale transparent LED screens.

[0070] Limited by traditional PCB manufacturing process standards, the overcurrent that PCB boards can withstand is relatively low, so it is impossible to produce PCB boards that are too large. Under current process standards, a PCB board of 2 meters in length is already the limit, which limits the development of large-scale LED display screens (over 2 meters) based on PCB substrates. The first type of connecting wire used in this technical solution is a thickened metal circuit with a thickness of up to 213μm. This is significantly different from the circuit thickness used in the prior art, so this technical solution has a stronger overcurrent capability. A single PCB substrate using this technical solution can easily reach 3 meters in length, which can achieve a large LED display while ensuring the brightness and color balance of the LED light source.

[0071] The specific embodiments of the present invention are as follows:

[0072] Example 1

[0073] This embodiment Figure 2As shown, an LED carrier is composed of multiple carrier units 100. It should be noted that the LED carrier is a whole that can be divided into multiple carrier units 100. This division can be virtual units divided from a complete LED carrier, or there can be a physical connection between the multiple carrier units. However, it should not be understood that the carrier units 100 are completely independent entities.

[0074] In this technical solution, the boundary of the LED carrier is composed of the boundary arrangement of multiple carrier units 100, so the splicing effect of the joint of two LED carriers is the same as the effect of the splicing of two carrier units 100, both of which have no sense of boundary and can form a perfect whole. In theory, the LED carrier can be expanded infinitely.

[0075] This embodiment Figure 1 As shown, the carrier unit 100 includes a hollow area 111 and a solid area 12 . When a plurality of the carrier units 100 are combined, the hollow areas 111 at corresponding positions of adjacent carrier units 100 can be combined to form a complete through hole 11 .

[0076] In the drawings related to the LED carrier, the dotted lines around the carrier unit 100, the dotted lines adjacent to the carrier unit 100, and the lines adjacent to the physical area 12 in the same LED carrier are for better understanding of the present technical solution.

[0077] It should be noted that the carrier unit 100 includes a hollow area 111 and a solid area 12. The carrier unit 100 is a subdivision of the LED carrier. The four corners of the carrier unit 100 are the hollow areas 111. The intersection of the extension lines of the longitudinal straight edges and the transverse straight edges of the carrier unit 100 is the center point of the through hole 11. The center point of the through hole 11 is connected to the longitudinal straight edges and the transverse straight edges of the carrier unit 100 to form a hollow area 111. Figure 1 and Figure 2 The carrier unit in this embodiment is square, and the square carrier unit is easier to understand the technical solution.

[0078] In this technical solution, regardless of the shape of the through-hole, a hollow area 111 can be formed by simply connecting the center point of each through-hole 11 with the longitudinal straight edge and the transverse straight edge of the carrier unit 100. The carrier units can be spliced ​​together, and after splicing, the through-hole is composed of the hollow areas 111 at the corresponding positions of adjacent carrier units. It should be noted that in this embodiment, the division method of the carrier units is intended to more accurately illustrate this technical solution. Although the division of the carrier units in different scenarios varies, in fact, they are still regarded as the same technical solution.

[0079] This utility model is a technical solution based on a transparent or translucent LED carrier board. The LED display screen based on the LED carrier board can display images while also presenting a transparent visual effect. The regularly arranged through-holes 11 play a role in achieving this transparent visual effect. Since this technical solution uses a large number of LED illuminators (or LED lamp beads), the heat generated by them is a difficult technical problem to overcome throughout the industry. These regularly arranged through-holes 11 can simultaneously solve the two major problems of ventilation and heat dissipation.

[0080] When not in use, natural light can pass through the multiple through-holes 11, forming a display screen with a certain light transmittance. Under natural light conditions, the amount of light transmitted is related to the aperture size and density of the through-holes 11. The larger the aperture size and the higher the density of the through-holes 11, the more light is transmitted, and the closer to a transparent visual effect. The longer the viewing distance, the better the transparent visual effect.

[0081] It should be pointed out that the present technical solution does not limit the specific shape of the through hole 11 , and round holes, elliptical holes, square holes, irregular holes, etc. can all achieve the above-mentioned technical effects.

[0082] This embodiment Figure 3 As shown, a first-class sub-connection line 211 is provided on the back of the carrier unit physical area 12, and a plurality of first-class sub-connection lines 211 are combined and conducted to form a first-class connection line 21. A plurality of the carrier units 100 are arranged and combined to form an LED carrier with a first-class connection line 21 conducted.

[0083] In this embodiment, Figure 5 This is the back of the LED carrier board. Figure 9 FIG. 2 shows a situation where the first-type sub-connection lines 211 are combined and conducted to form the first-type connection line 21 .

[0084] It should be noted that, in this embodiment, the data signal can be transmitted through the first type connection line 21 in the form of a carrier.

[0085] In another embodiment, a separate data signal line may be provided. Figure 6 As shown, a second type of sub-connection line 221 is set on the front of the carrier unit physical area 12, and multiple second type sub-connection lines 221 are combined and connected to form a second type of connection line 22. Multiple carrier units 100 are arranged and combined to form an LED carrier with a second type of connection line 22 connected. Figure 8 FIG. 4 shows a situation where the second-type sub-connection lines 221 are combined and connected to form the second-type connection lines 22 , and the second-type connection lines 22 are data signal lines.

[0086] In the same LED carrier board, the first-type connecting wires 21 and the second-type connecting wires 22 are both smooth and complete connecting wires. This embodiment is described in the form of a combination of multiple sub-connecting wires only for the convenience of description.

[0087] Furthermore, the first type of connecting wire 21 in this embodiment is a thickened metal circuit with strong overcurrent capability.

[0088] Because the thickened metal traces have low resistance and strong overcurrent capability, they ensure sufficient power to the rear end of the LED substrate. This results in excellent light uniformity and color reproduction for the LEDs across the entire substrate. The reduced resistance of the thickened metal traces also reduces heat generation, aiding heat dissipation.

[0089] In this embodiment, the first-type connecting lines 21 are lines with a uniform line width, that is, the line width of the entire first-type connecting lines 21 is the same.

[0090] At this time, the value range of the thickness h of the first type connecting line 21 is determined by the following formula:

[0091]

[0092] ρ is the resistivity of the material of the first type of connecting wire, L is the length of the first type of connecting wire, R is the resistance value of the first type of connecting wire, S1 is the total hollow area of ​​a single carrier unit, T is the physical transmittance of the LED carrier, r1 is the horizontal length from the center point of the through hole 11 to the through hole edge, r2 is the vertical length from the center point of the through hole 11 to the through hole edge, A is the ratio of the longitudinal straight side length b to the transverse straight side length a of the solid area, w is the width of the first type of connecting wire, θ is the visible light transmittance angle, d is the thickness of the solid area of ​​the carrier unit, where 0.2mm≤r1≤20mm, 0.2mm≤r2≤20mm, 0.5≤a≤5mm, 0.5≤b≤5mm, as Figure 3 and Figure 7 shown.

[0093] The minimum thickness h of the first type connecting wire 21 is determined by the required first type connecting wire resistance R, and the maximum thickness h is determined by the visible light transmission angle θ. In this embodiment, the optimal visible light transmission angle θ is: 90°≤θ≤154°.

[0094] The thickness of the first type of connecting wire 21 affects the transparency of the LED carrier board. The thicker the first type of connecting wire 21, the worse the transparency of the LED carrier board. The visible light transmission angle θ indirectly affects the thickness of the first type of connecting wire 21. Figure 7 As shown, H is the sum of the thickness d of the physical area of ​​the carrier unit and the thickness h of the first type of connecting line 21. The smaller the visible light transmission angle θ, the thicker H is, which indirectly reflects the thicker the first type of connecting line 21.

[0095] Because 90° ≤ θ ≤ 154°, within this range, the maximum thickness h of the first-type connecting wire 21 occurs when θ = 90°. θ is a range of values, and the thickness h varies within different ranges. In this embodiment, the minimum value of θ is used to define the maximum thickness h of the first-type connecting wire 21.

[0096] In this embodiment, the first type of connecting lines 21 are lines with uniform line width. Then, the formula Meaning:

[0097] The horizontal straight edge length is calculated from S1, the total hollow area of ​​a single carrier unit, the physical transmittance T, r1, r2 and A.

[0098] The resistance formula is: Wherein S is the cross-sectional area of ​​the first type connecting line 21 , w is the width of the first type connecting line 21 , and S=w*h.

[0099] When w is at its maximum value, it is equal to the length of the horizontal straight side a, and at this time k1=1. In this embodiment, Right now:

[0100]

[0101] In this embodiment, the LED carrier is composed of carrier units 100. The physical light transmittance of the LED carrier is equal to the ratio of the total hollow area of ​​each carrier unit 100 to the total area of ​​the carrier units 100. When the through hole 11 is a circular hole, r1 and r2 are the transverse and longitudinal radii of the through hole 11. When r1 = r2, the through hole 11 is a perfect circle; when r1 ≠ r2, the through hole 11 is an ellipse. The length L of the first-type connecting wire 21 is equal to the length of the LED carrier. A longer LED carrier will result in a larger LED display device.

[0102] In this embodiment, the length of the vertical straight side of the solid area is b, and the length of the horizontal straight side is a. The preferred range of A is: 0.5≤A≤2. When A=1, the spacings between the through holes 11 from top to bottom and from left to right are equal.

[0103] In the preferred embodiment, the through hole 11 is a perfect circle, that is, r1=r 2, S1 is a circle with a diameter of r1, The length of the vertical straight side of the solid area is the same as the length of the horizontal straight side, a=b, that is, A=1, and the carrier unit 100 is a square. Can be simplified to:

[0104]

[0105] In this embodiment, the thickness h of the first-type connecting line is related to the transmittance T, the length L of the first-type connecting line, and the resistance R of the first-type connecting line. The longer the length L of the first-type connecting line and the higher the transmittance T, the thicker the required thickness h of the first-type connecting line is for the same resistance R.

[0106] It should be noted that the formula in this embodiment is also applicable when the through hole 11 in this embodiment is other regular holes, such as Figure 4 The regular hexagonal through hole shown in FIG will not be described in detail in this article.

[0107] In this embodiment, the formula meaning:

[0108] Figure 7 Schematic diagram of the relationship between the visible light transmittance angle of the carrier unit transverse cross section and the thickness of the first type of connecting line. Wherein, H is the sum of the thickness d of the carrier unit solid area and the thickness h of the first type of connecting line 21, 21 is the first type of connecting line when the width w=a, 21a is the extreme position of the thickness of the first type of connecting line under the same resistance R, and the extreme position is at the middle position of the transverse straight side length a, and the angle Into a trigonometric relationship:

[0109]

[0110] Right now:

[0111] Specific examples are as follows:

[0112] An LED carrier board, r1 = r2 = 1.5 * 10 -3 m, a=b=0.90*10 -3 m、 T = 0.463, L = 3m, the material of the first type connecting wire 21 is copper, and the copper resistivity ρ = 1.72×10 -8 . 120°≤θ≤154°, d=0.3*10 -3 m.

[0113] In this embodiment, the first type of connecting wire 21 meets the requirement of passing the target high current at the lowest voltage drop, so as to meet the power supply demand of each LED light-emitting body on the line and achieve the purpose of uniform light emission.

[0114] Specifically in this example, when L = 3m, the required line voltage drop U = 0.4V and the required high current I ≥ 3.5A, then the resistance R = U / I ≤ 0.114Ω, then according to the minimum end formula:

[0115]

[0116] That is to say, when the thickness h of the first-type connecting wire 21 is greater than or equal to 503 μm, the requirements of the line voltage drop U and the current I can be met.

[0117] According to the maximum value, when θ=120 0 When h reaches its maximum value:

[0118]

[0119] Therefore, it can be determined that when 503μm≤h≤1690μm, the requirements for line voltage drop U=0.4V and high current I≥100A can be met. Furthermore, when h equals 1690μm, the display transparency can be guaranteed at a relatively wide visible light transmission angle. In other words, within the range of 503μm≤h≤1690μm, the brightness and color performance of LED luminaires in different areas are balanced while maintaining the transparency of the display.

[0120] In another improved embodiment, an extension portion 212 is provided on both sides of the first type sub-connection line 211, and the extension length of the extension portion 212 does not exceed the boundary of the solid area 12. The area of ​​the first type sub-connection line 211 is smaller than the area of ​​the solid area 12 and does not block the hollow area 111. Figure 10 and Figure 11 shown.

[0121] In this embodiment, the outline of the first type of sub-connection line of the extension portion 212 is entirely or partially beyond the LED light-emitting body, so that the through hole 40 (described below) provided on the front of the carrier unit 100 can be ensured. Figure 16 ) can be directly connected to the first type of sub-connection line on the back.

[0122] In this embodiment, a plurality of first-type sub-connection lines 211 are combined and connected to form a first-type connection line 21, so a plurality of extension portions 212 are regularly distributed on both sides of the first-type connection line 21. At this time, the shape of the first-type connection line 21 is not a line with uniform line width, but a long strip with regularly protruding extension portions. Figure 12 and Figure 13 The extended portion 212 can further reduce the resistance of the first type connecting line 21 .

[0123] In the embodiment in which the extension portion 212 is provided, the value range of the thickness h of the first type of connecting line is determined by the following formula:

[0124]

[0125] ρ is the resistivity of the material of the first type of connecting wire, L is the length of the first type of connecting wire, R is the resistance value of the first type of connecting wire, S1 is the total hollow area of ​​a single carrier unit, T is the physical transmittance of the LED carrier, r1 is the horizontal length from the center point of the through hole 11 to the edge of the through hole, r2 is the vertical length from the center point of the through hole 11 to the edge of the through hole, A is the ratio of the longitudinal straight side length b to the transverse straight side length a of the physical area, W1 is the width of the equivalent circuit of the first type of connecting wire set in the expansion part, w 最大 is the maximum width of the first type of connecting line, θ is the visible light transmittance angle, d is the thickness of the physical area of ​​the carrier unit, where 0.2 mm ≤ r1 ≤ 20 mm, 0.2 mm ≤ r2 ≤ 20 mm, 0.5 ≤ a ≤ 5 mm, and 0.5 ≤ b ≤ 5 mm.

[0126] According to the basic principles of physics, while keeping the volume, thickness h, length and current flow direction the same, the resistance of the first sub-connection line 211 of the extension part 212 is higher than that of the first sub-connection line 211 of the extension part 212. Figure 5 The resistance of the uniform width line 213 is such that the uniform width line 213 can be regarded as an equivalent line of the first type of connecting line (the part indicated by the dotted line).

[0127] W1 is the width of the uniform width line 213, and the cross-sectional area S2 of the uniform width line 213 = w1*h, then:

[0128]

[0129] In the limit case, the area of ​​the first type of sub-connection line 211 is the same as the area of ​​the physical area 12, w 最大 is the maximum width of the first type of connecting line. At this time, the above parameters can be calculated:

[0130]

[0131] In practice, the formula is:

[0132] While maintaining the same volume, thickness h, length and current flow direction, the resistance of the line 213 with uniform width is smaller than the resistance of the first type of sub-connection line 211 with the extended portion 212 .

[0133] so,

[0134] When the through hole 11 is a perfect circle, that is, r1 = r 2, S1 is a circle with a diameter of r1, The length of the vertical straight side of the solid area is the same as the length of the horizontal straight side, a=b, that is, A=1, and the carrier unit 100 is a square. Can be simplified to:

[0135] In the above embodiment, the transverse side length of the carrier unit 100 is a+2*r1, and the longitudinal side length of the carrier unit 100 is b+2*r2. The common ratio range of the transverse side length to the longitudinal side length of the carrier unit 100 is:

[0136] This is the optimal ratio of this embodiment, and the carrier unit 100 is a square.

[0137] when When a=b, the carrier unit 100 is a square with uniform intervals between the hollow areas 111 , and the LED carrier is an LED carrier with uniform intervals between the through holes 11 .

[0138] when When a=b and r1=r2, the carrier unit 100 is a square with uniform spacing between the hollow areas 111 , the through holes 11 are regular polygons or circles, and the LED carrier exhibits uniform spacing between the through holes 11 .

[0139] Specific examples are as follows:

[0140] An LED carrier board, r1 = r2 = 1.5 * 10 -3 m, a=b=0.90*10 -3 m、 T = 0.463, L = 3m, the material of the first type connecting wire 21 is copper, and the copper resistivity ρ = 1.72×10 -8 . 120°≤θ≤154°, d=0.3*10 - 3 m.

[0141] In this example, when L = 3m, the required line voltage drop U = 0.4V and the required high current I ≥ 3.5A, then the resistance R = U / I ≤ 0.114Ω, then according to the minimum end formula:

[0142]

[0143] That is to say, when the thickness h of the first-type connecting wire 21 is greater than or equal to 271 μm, the requirements of the line voltage drop U and the current I can be met.

[0144] According to the maximum value end, when θ = 120°, h reaches its maximum value:

[0145]

[0146]

[0147] Therefore, it can be determined that a thickness of 271μm ≤ h ≤ 1690μm can meet the requirements of a supply voltage of U = 4V and a high current of I ≥ 100A. This means that within this range, the brightness and color of the LEDs in different areas are balanced while maintaining the transparency of the display. The actual thickness h of the first-type connecting wire in this product with an expansion section is 500μm.

[0148] It should be noted that when k1 is 1, the width of the first-type connecting line is equal to the horizontal straight edge length a, and when k2 is 1, the width of the equivalent circuit of the first-type connecting line is equal to the horizontal straight edge length a. When k1 and k2 are both 1, the maximum values ​​that the width of the first-type connecting line and the width of the equivalent circuit of the first-type connecting line can reach. However, due to the limitations of PCB production processes and actual application scenarios, k1 and k2 values ​​of 1 are not optimal.

[0149] On the one hand, it is because the PCB production process requires a safe distance to be reserved. When k1 and k2 are less than 1, the production yield of the LED substrate will be improved.

[0150] Secondly, when multiple LED carrier boards need to be spliced ​​together, metal clips are often used to secure the joints (to meet the requirements of lightness, thinness, and transparency, metal clips provide the required connection strength). If k1 and k2 are 1, the first-class connecting wires are likely to come into contact with the metal clips and cause a short circuit. Therefore, under this condition, keeping k1 and k2 less than 1 can prevent short circuits on the LED carrier boards.

[0151] As can be seen from this example, the first-type connecting wire 21 with an expanded portion can be made thinner while maintaining the same resistance requirement. In other words, with the expanded portion, the resistance R of the first-type connecting wire 21 can be reduced by 50% at the same thickness. Because the cross-section of the first-type connecting wire 21 with the expanded portion is significantly larger at the expanded portion, the average cross-section of the entire first-type connecting wire 21 also increases. According to the resistance formula, the resistance R decreases while L remains unchanged.

[0152] The first type of connecting wire 21 in this embodiment is a thickened metal circuit. When the first type of connecting wire 21 is provided with an expansion portion, the thickness of the first type of connecting wire 21 will be thinner. The larger the horizontal straight side length a, the more sufficient setting space there is for the width of the first type of connecting wire or the width of the equivalent circuit of the first type of connecting wire, and the smaller k1 and k2 can be set. Within the value range of the parameters r1, r2, a, n, and k2, setting r1 = 20mm, r2 = 20mm, a = 5mm, b = 5mm and k2 = 0.125 is the minimum value of the thickness h of the first type of connecting wire 21. Then, the minimum value of the thickness h of the first type of connecting wire 21 is determined by the following formula:

[0153]

[0154] In this example, the material of the first type connecting wire 21 is copper, and the resistivity of copper is ρ=1.72×10 -8 , L = 3m, the required line voltage drop U = 0.4V and the required high current I ≥ 3.5A, then the resistance R = U / I ≤ 0.114Ω.

[0155] At this time, T = 0.62:

[0156]

[0157] Therefore, in this embodiment, the thickness h of the first type connecting wire 21 is ≥ 213 μm.

[0158] In another setting of this embodiment, when r1=20 mm, r2=20 mm, a=4 mm, b=4 mm, and k2=0.125, the minimum value of the thickness h of the first type connecting wire 21 is obtained. Then, the minimum value of the thickness h of the first type connecting wire 21 is determined by the following formula:

[0159]

[0160] In this example, the material of the first type connecting wire 21 is copper, and the resistivity of copper is ρ=1.72×10 -8 , L = 3m, the required line voltage drop U = 0.4V and the required high current I ≥ 3.5A, then the resistance R = U / I ≤ 0.114Ω.

[0161] At this time, T = 0.65:

[0162]

[0163] Therefore, in this setting, the thickness h of the first type connecting wire 21 is ≥ 236 μm.

[0164] In the further setting of this embodiment, r1=20 mm, r2=20 mm, a=3 mm, b=3 mm and k2=0.125 are the minimum values ​​of the thickness h of the first type connecting wire 21. Then, the minimum value of the thickness h of the first type connecting wire 21 is determined by the following formula:

[0165]

[0166] In this example, the material of the first type connecting wire 21 is copper, and the resistivity of copper is ρ=1.72×10 -8 , L = 3m, the required line voltage drop U = 0.4V and the required high current I ≥ 3.5A, then the resistance R = U / I ≤ 0.114Ω.

[0167] At this time, T = 0.68:

[0168]

[0169] Therefore, in this setting, the thickness of the first type connecting wire 21 is h≥264 μm.

[0170] In another embodiment, when r1=0.2 mm, r2=0.2 mm, a=0.5 mm, b=0.5 mm, and k2=1, the thickness h of the first type connecting wire 21 is the smallest, which is:

[0171]

[0172] In this example, the material of the first type connecting wire 21 is copper, and the resistivity of copper is ρ=1.72×10 -8 , L = 3m, the required line voltage drop U = 0.4V and the required high current I ≥ 3.5A, then the resistance R = U / I ≤ 0.114Ω.

[0173] At this time, T = 0.155:

[0174]

[0175] Therefore, in this embodiment, the thickness h of the first type connecting wire 21 is ≥ 595 μm.

[0176] Therefore, the thickness h of the first type of connecting wire 21 in Example 1 must be greater than the maximum value of the printed circuit board standard design specification IPC-2152 promulgated by the International Association for Printed Circuits (IPC).

[0177] Example 2

[0178] The difference between this embodiment and embodiment 1 is that a branch line structure is provided on the LED carrier board.

[0179] The technical problem addressed by this embodiment is the inconsistent RGB arrangement of adjacent LED beads in conventional transparent LED screens, or the requirement for multiple specifications of LED beads in conventional transparent LED screens. These issues not only lead to poor visual effects but also complicate the production process and increase costs (at least two types of beads must be produced: A and B. Furthermore, it's very easy to mistake A for B during assembly).

[0180] In the prior art, LED illuminators or LED lamp beads are usually composed of an LED driver chip, three types of lamp beads R (red), G (green) and B (blue). Figure 14As shown, GND is the GND line, VDD is the VDD power supply line, LED luminous body 71 (A lamp bead) and LED luminous body 72 (B lamp bead) are two kinds of LED luminous bodies with different RGB arrangements. In common application scenarios, due to the limitations of the wiring structure (such as Figure 14 As shown in , two types of LED light-emitting bodies are usually required in the LED carrier board, namely LED light-emitting body 71 and LED light-emitting body 72, wherein the interior of LED light-emitting body 71 is R, G and B lamp beads from left to right, and the interior of LED light-emitting body 72 is B, G and R lamp beads from left to right, that is, the arrangement of the lamp beads inside LED light-emitting body 71 and LED light-emitting body 72 is different. It can be understood by those skilled in the art that the color presented by the LED light-emitting body is the color after the RGB three-color lamp beads are dimmed by the driving signal. When the physical position of the RGB three-color lamp beads inside the LED light-emitting body changes, the color presented by the dimming under the same driving signal will have a certain deviation. Therefore, due to the different arrangement of the lamp beads inside the above-mentioned LED light-emitting bodies, the display effects of the two light-emitting bodies in actual applications are also different. This leads to poor color consistency of the entire LED display device, and the human eye can easily see this deviation, so it is difficult to achieve ideal color reproduction in this way.

[0181] This embodiment only requires one specification of LED illuminators, and solves the above technical problems through a special wiring structure formed by the first type of connecting wires 21, the second type of connecting wires 22, and the first branch wires and the second branch wires to be introduced below.

[0182] The details of this embodiment are as follows:

[0183] This embodiment is an LED carrier board composed of a plurality of carrier board units. The carrier board unit 100 includes a first carrier board unit 100a and a second carrier board unit 100b. Figure 16 and Figure 17 shown.

[0184] The first carrier unit 100a and the second carrier unit 100b are defined as follows:

[0185] The carrier unit whose first sub-connection line on the back of the physical area 12 is a VDD power supply line is defined as a first carrier unit 100a; the carrier unit whose first sub-connection line on the back of the physical area 12 is a GND line is defined as a second carrier unit 100b.

[0186] In this embodiment, a plurality of the first carrier units 100a are combined to form a first sub-LED carrier 101 in which a row or a column of VDD power supply lines are connected to data signal lines; a plurality of the second carrier units 100b are combined to form a second sub-LED carrier 102 in which a row or a column of GND lines are connected to data signal lines. The first sub-LED carrier 101 and the second sub-LED carrier 102 are arranged and combined to form the LED carrier.

[0187] Figure 15 In the figure, a row of first sub-LED carrier boards 101 and a row of second sub-LED carrier boards 102 are alternately arranged and combined to form an LED carrier board. It should be noted that Figure 15 The arrangement and combination of the first sub-LED carrier board 101 and the second sub-LED carrier board 102 is the best combination in this technical solution. Other combinations that can achieve the technical effect of this technical solution are also within the scope of protection of this patent, such as Figure 20 The case where one row of first sub-LED carriers 101 and two rows of second sub-LED carriers 102 are alternately arranged and combined to form an LED carrier, or the case where one row of second sub-LED carriers 102 and two rows of first sub-LED carriers 101 are alternately arranged and combined to form an LED carrier, etc., etc., will not be repeated here.

[0188] It should be noted that the front of the carrier unit physical area 12 is provided with a first electrode pin 41, a second electrode pin 42 and a third electrode pin 43, and the first electrode pin 41, the second electrode pin 42 and the third electrode pin 43 are used to fix and electrically connect the LED light-emitting body 3.

[0189] In this embodiment, the first type of connection line 21 includes a VDD power supply line and a GND line, the second type of connection line 22 is a data signal line, the first electrode pin 41 is electrically connected to the VDD power supply line, the second electrode pin 42 is electrically connected to the GND line, and the third electrode pin 43 is electrically connected to the data signal line.

[0190] The first branch line and the second branch line provided in this embodiment can solve the technical problem of poor color consistency caused by inconsistent RGB arrangement of two adjacent lamp beads on the LED transparent screen.

[0191] Specifically, if Figure 15 As shown, the first sub-LED carrier board 101 is provided with a first branch line 23 , and the second sub-LED carrier board 102 is provided with a second branch line 24 .

[0192] One end of the first branch line 23 is electrically connected to the second electrode pin 42 on the first sub-LED carrier board 101, and the other end is connected to the second electrode pin 42 on the first sub-LED carrier board 101 through the via hole 40 (such as Figure 16) is electrically connected to the GND line on the back side of the adjacent second sub-LED carrier board 102.

[0193] One end of the second branch line 24 is electrically connected to the first electrode pin 41 on the second LED carrier board 102, and the other end is connected to the first electrode pin 41 on the second LED carrier board 102 through the via hole 40 (eg Figure 16 ) is electrically connected to the VDD power supply line on the back side of the adjacent first sub-LED carrier board 101.

[0194] The arrangement of the first branch line 23 and the second branch line 24 can ensure that the arrangement order of the first electrode pin 41, the second electrode pin 42 and the third electrode pin 43 on the first sub-LED carrier board 101 and the second sub-LED carrier board 102 is consistent, and can only adapt to one specification of LED light-emitting body, so the color consistency of this technical solution is better.

[0195] In this embodiment, the following important (non-exhaustive) configurations of the first branch line 23 and the second branch line 24 are possible:

[0196] 1. The second electrode pin 42 of each first carrier unit 100a in the first sub-LED carrier 101 is electrically connected to one of the first branch lines 23 , and the first electrode pin 41 of each second carrier unit 100b in the second sub-LED carrier 102 is electrically connected to one of the second branch lines 24 .

[0197] For example, Figure 15 and Figure 16 As shown, under a row of first sub-LED carriers 101 and a row of second sub-LED carriers 102 alternately arranged, adjacent first carrier units 100a and second carrier units 100b are connected to each other through a first branch line 23 and a second branch line 24 .

[0198] You can also Figure 19 As shown, a row of first LED sub-carriers 101 and a row of second LED sub-carriers 102 are alternately arranged. Figure 20 From left to right, the first carrier unit 100a on the left is connected to the second carrier unit 100b in the middle via the first branch line 23, the second carrier unit 100b in the middle is connected to the first carrier unit 100a on the right via the second branch line 24, and so on...

[0199] 2. The plurality of first carrier board units 100a in the first sub-LED carrier board 101 are grouped together, and the second electrode pins 42 in the same group are electrically connected and then electrically connected to one of the first branch lines 23. The plurality of second carrier board units 100b in the second sub-LED carrier board 102 are grouped together, and the first electrode pins 41 in the same group are electrically connected and then electrically connected to one of the second branch lines 24.

[0200] For example, Figure 17 and Figure 18 As shown, a row of first LED sub-carriers 101 and a row of second LED sub-carriers 102 are alternately arranged. Figure 15 Two adjacent first carrier board units 100a in the first sub-LED carrier board 101 are grouped together, and the second electrode pins 42 are electrically connected via a connecting line 25 and then electrically connected to one of the first branch lines 23. Two adjacent second carrier board units 100b in the second sub-LED carrier board 102 are grouped together, and the first electrode pins 41 are electrically connected via a connecting line 26 and then electrically connected to the second branch line 24. The two adjacent first carrier board units 100a in the first sub-LED carrier board 101 and the two adjacent second carrier board units 100b in the second sub-LED carrier board 102 are connected via one of the first branch lines 23 and one of the second branch lines 24.

[0201] For another example, in a row of first sub-LED carrier boards 101 and a row of second sub-LED carrier boards 102 arranged alternately, three adjacent first carrier board units 100a in the first sub-LED carrier board 101 are grouped together, and the second electrode pins 42 are electrically connected and then electrically connected to one of the first branch lines 23. Three adjacent second carrier board units 100b in the second sub-LED carrier board 102 are grouped together, and the first electrode pins 41 are electrically connected and then electrically connected to the second branch line 24. The three adjacent first carrier board units 100a in the first sub-LED carrier board 101 and the three adjacent second carrier board units 100b in the second sub-LED carrier board 102 are connected via one of the first branch lines 23 and one of the second branch lines 24.

[0202] All first carrier board units 100a in the first sub-LED carrier board 101 are grouped together. The second electrode pins 42 in the same group are electrically connected and then electrically connected to one of the first branch lines 23. The second carrier board units 100b in the second sub-LED carrier board 102 can be freely combined.

[0203] Or all the second carrier units 100b in the second sub-LED carrier 102 are grouped together, and the first electrode pins 41 in the same group are electrically connected and then electrically connected to one of the second branch lines 24. The first carrier units 100a in the first sub-LED carrier 101 can be freely combined.

[0204] etc.

[0205] It should be noted that the thickness of the first type of connecting wire in this embodiment is preferably a thickened metal line, and the thickness of the first type of connecting wire is:

[0206] When the first-type connecting lines 21 are lines with a uniform line width, the value range of the thickness h of the first-type connecting lines is determined by the following formula:

[0207]

[0208] ρ is the resistivity of the material of the first type of connecting wire, L is the length of the first type of connecting wire, R is the resistance value of the first type of connecting wire, S1 is the total hollow area of ​​a single carrier unit, T is the physical transmittance of the LED carrier, r1 is the horizontal length from the center point of the through hole 11 to the through hole edge, r2 is the vertical length from the center point of the through hole 11 to the through hole edge, A is the ratio of the longitudinal straight side length b to the transverse straight side length a of the solid area, w is the width of the first type of connecting wire, θ is the visible light transmittance angle, d is the thickness of the physical area of ​​the carrier unit, where 0.2 mm ≤ r1 ≤ 20 mm, 0.2 mm ≤ r2 ≤ 20 mm, 0.5 ≤ a ≤ 5 mm, and 0.5 ≤ b ≤ 5 mm.

[0209] When the first-type sub-connection line is provided with extension portions on both sides, the value range of the first-type sub-connection line h is determined by the following formula:

[0210]

[0211] ρ is the resistivity of the material of the first type of connecting wire, L is the length of the first type of connecting wire, R is the resistance value of the first type of connecting wire, S1 is the total hollow area of ​​a single carrier unit, T is the physical transmittance of the LED carrier, r1 is the horizontal length from the center point of the through hole 11 to the edge of the through hole, r2 is the vertical length from the center point of the through hole 11 to the edge of the through hole, A is the ratio of the longitudinal straight side length b to the transverse straight side length a of the physical area, W1 is the width of the equivalent circuit of the first type of connecting wire set in the expansion part, w 最大 is the maximum width of the first type of connecting line, θ is the visible light transmittance angle, d is the thickness of the physical area of ​​the carrier unit, where 0.2 mm ≤ r1 ≤ 20 mm, 0.2 mm ≤ r2 ≤ 20 mm, 0.5 ≤ a ≤ 5 mm, and 0.5 ≤ b ≤ 5 mm.

[0212] The visible light transmission angle θ in this embodiment is: 90°≤θ≤154°.

[0213] It should be noted that the thickness parameter setting and algorithm of the first type of connecting wire in this embodiment are the same as those in Example 1. For details, please refer to Example 1 and will not be repeated in this embodiment.

[0214] In other embodiments, Figure 21 and Figure 22As shown, a fourth electrode pin 44 is provided on the front side of the carrier unit physical area 12, and the fourth electrode pin 44 is electrically connected to the second-type sub-connection line 221, and the second-type sub-connection line 221 includes an interruption 222, and the interruption of the second-type sub-connection line 221 is provided between the third electrode pin 43 and the fourth electrode pin 44.

[0215] When the LED light-emitting body is mounted on the LED carrier board, the first electrode pin 41 , the second electrode pin 42 , the third electrode pin 43 and the fourth electrode pin 44 are all electrically connected to the LED light-emitting body.

[0216] It should be noted that the LED light-emitting body in this embodiment uses an LED light-emitting body with a data signal input terminal DIN and a data signal output terminal DOUT interface. The LED light-emitting body contains an LED driver chip (the LED light-emitting body in the aforementioned embodiment also contains an LED driver chip). In this embodiment, the third electrode pin 43 is connected to the data signal input terminal DIN of the LED driver chip, and the fourth electrode pin 44 is connected to the data signal output terminal DOUT of the LED driver chip, or the third electrode pin 43 is connected to the data signal output terminal DOUT of the LED driver chip, and the fourth electrode pin 44 is connected to the data signal input terminal DIN of the LED driver chip.

[0217] The second type of sub-connection line 221 in this embodiment includes a break 222, such as Figure 22 The interrupt port 222 shown in FIG is located between the third electrode pin 43 and the fourth electrode pin 44. When the LED light-emitting element is connected to the first electrode pin 41, the second electrode pin 42, the third electrode pin 43, and the fourth electrode pin 44, the second-type sub-connection line 221 located therein is connected or electrically communicated. Therefore, the data signal is transmitted to the next-level LED light-emitting element through the LED light-emitting element provided on the second-type sub-connection line 221. This data transmission method is a commonly used "one-in, one-out" data signal transmission method in the industry. In contrast, the second-type sub-connection line 221 in the aforementioned embodiment is entirely conductive, and data signals are transmitted through the address code of each LED light-emitting element. The two adopt different technical means.

[0218] In other embodiments, Figure 23 and Figure 24 As shown, the front of the carrier unit physical area 12 is further provided with a fifth electrode pin 45 and a sixth electrode pin 46, and the second type of connection line 22 includes a first data signal line 22a and a second data signal line 22b. It should be noted that the first data signal line 22a is connected to the first data signal line 22a. Figure 19 The second type of sub-connection line 221 in the figure overlaps.

[0219] When the LED light-emitting body is mounted on the LED carrier board, the first electrode pin 41 , the second electrode pin 42 , the third electrode pin 43 , the fourth electrode pin 44 , the fifth electrode pin 45 and the sixth electrode pin 46 are all electrically connected to the LED light-emitting body.

[0220] In this embodiment, the third electrode pin 43 and the fourth electrode pin 44 are electrically connected to the first data signal line 22 a , and the fifth electrode pin 45 and the sixth electrode pin 46 are electrically connected to the second data signal line 22 b .

[0221] The second data signal line 22 b includes a plurality of interrupts 222 , and the interrupts of the second data signal line 22 b are disposed between the fifth electrode pin 45 and the sixth electrode pin 46 .

[0222] After the first electrode pin 41, the second electrode pin 42, the third electrode pin 43, the fourth electrode pin 44, the fifth electrode pin 45 and the sixth electrode pin 46 are electrically connected to the LED light-emitting body, the disconnected second-type sub-connection line 221 (first data signal line 22a) is electrically connected through the circuit inside the LED light-emitting body and the driving data is transmitted to the next-level LED light-emitting body.

[0223] It should be noted that this embodiment also electrically connects the first data signal line 22a and the second data signal line 22b through the internal circuitry of the LED light-emitting element. Specifically, the LED light-emitting element electrically connects the third electrode pin 43 of the first data signal line 22a and the sixth electrode pin 46 of the second data signal line 22b. This allows the first data signal line 22a and the second data signal line 22b to be electrically connected through the internal circuitry. In this way, if an LED light-emitting element fails and the path for transmitting drive data to the next-level LED light-emitting element via the first data signal line 22a is interrupted, the drive data can be transmitted via the electrically connected path between the first data signal line 22a and the second data signal line 22b of the previous level.

[0224] In this embodiment, the carrier unit 100 further includes a third branch line 27 , which is disposed on the front surface of the carrier unit physical area 12 . One end of the third branch line 27 is electrically connected to the third electrode pin 43 , and the other end is electrically connected to the sixth electrode pin 46 .

[0225] In this embodiment, there is no line connecting the first data signal line 22a and the second data signal line 22b inside the LED light-emitting body, and such a line needs to be set outside the LED light-emitting body. The third branch line 27 is the line connecting the first data signal line 22a and the second data signal line 22b set outside the LED light-emitting body.

[0226] An embodiment of the present utility model also discloses a display device, which includes the LED carrier board disclosed in Example 1 or Example 2. The display device can realize a large-size LED transparent screen and present high-definition, high-brightness, delicate and natural, and three-dimensional transparent visual effects.

[0227] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention, and are not intended to limit the implementation methods of the present invention. A person skilled in the art will be able to make other variations or modifications based on the above description. It is not necessary and impossible to enumerate all implementation methods here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the claims of the present invention.

Claims

1. An LED carrier board, characterized in that: The LED carrier board is composed of a plurality of carrier board units; The carrier unit comprises a hollow area and a solid area. When a plurality of the carrier units are combined, the hollow areas at corresponding positions of adjacent carrier units can be combined to form a complete through hole. The back side of the physical area of ​​the carrier unit is provided with a first-type sub-connection line, a plurality of first-type sub-connection lines are combined and conducted to form a first-type connection line, and a plurality of the carrier units are arranged and combined to form an LED carrier with the first-type connection lines being conducted; The first type of connecting wire is a thickened metal line used for power supply.

2. The LED carrier board according to claim 1, characterized in that: The value range of the thickness h of the first type of connecting wire is determined by the following formula: Wherein, ρ is the resistivity of the material of the first type of connecting wire, L is the length of the first type of connecting wire, R is the resistance value of the first type of connecting wire, S1 is the total hollow area in a single carrier unit, T is the physical transmittance of the LED carrier, r1 is the horizontal length from the center point of the through hole to the edge of the through hole, r2 is the vertical length from the center point of the through hole to the edge of the through hole, A is the ratio of the longitudinal straight side length b of the physical area to the lateral straight side length a, w is the width of the first type of connecting wire, θ is the visible light transmittance angle, and d is the thickness of the solid area of ​​the carrier unit.

3. The LED carrier board according to claim 1, characterized in that: The first type of sub-connection line is provided with expansion parts on both sides, and the value range of the thickness h of the first type of connection line is determined by the following formula: Wherein, ρ is the resistivity of the material of the first type of connecting wire, L is the length of the first type of connecting wire, R is the resistance value of the first type of connecting wire, S1 is the total hollow area in a single carrier unit, T is the physical transmittance of the LED carrier, r1 is the horizontal length from the center point of the through hole to the edge of the through hole, r2 is the vertical length from the center point of the through hole to the edge of the through hole, A is the ratio of the longitudinal straight side length b of the physical area to the lateral straight side length a, W1 is the width of the equivalent circuit of the first type of connecting wire set in the expansion part, w 最大 is the maximum width of the first type of connecting line, θ is the visible light transmittance angle, and d is the thickness of the solid area of ​​the carrier unit.

4. The LED carrier board according to claim 2 or 3, characterized in that: The transverse side length of the carrier unit is a+2*r1, the longitudinal side length of the carrier unit is b+2*r2, and the ratio of the transverse side length to the longitudinal side length of the carrier unit is in the range of:

5. The LED carrier board according to claim 2 or 3, characterized in that: The value range of θ is: 90°≤θ≤154°.

6. The LED carrier board according to claim 2 or 3, characterized in that: The value range of r1 is: 0.2mm≤r1≤20mm; the value range of r2 is: 0.2mm≤r2≤20mm; The value range of a is: 0.5≤a≤5mm; the value range of b is: 0.5≤b≤5mm.

7. The LED carrier board according to claim 2, characterized in that: The value range of k1 is: 0.25≤k1≤1.

8. The LED carrier board according to claim 3, characterized in that: The value range of k2 is: 0.125≤k2≤1.

9. An LED carrier board, characterized in that: The LED carrier is composed of a plurality of carrier units, wherein the carrier units include a first carrier unit and a second carrier unit; The first type of sub-connection line on the back of the physical area of ​​the first carrier unit is a VDD power supply line, and the first type of sub-connection line on the back of the physical area of ​​the second carrier unit is a GND line. A plurality of the first type of sub-connection lines are combined and connected to form a first type of connection line, and the first type of connection line includes a VDD power supply line and a GND line; A plurality of the first carrier board units are combined to form a first sub-LED carrier board in which a row or a column of VDD power supply lines are connected to data signal lines; a plurality of the second carrier board units are combined to form a second sub-LED carrier board in which a row or a column of GND lines are connected to data signal lines, and the first sub-LED carrier board and the second sub-LED carrier board are arranged and combined to form the LED carrier board.

10. The LED carrier board according to claim 9, characterized in that: The first sub-LED carrier board and the second sub-LED carrier board are alternately arranged and combined to form the LED carrier board.

11. The LED carrier board according to claim 9, characterized in that: The front of the LED carrier is provided with a first electrode pin, a second electrode pin and a third electrode pin, the first electrode pin is electrically connected to the VDD power supply line, the second electrode pin is electrically connected to the GND line, and the third electrode pin is electrically connected to the data signal line; The first sub-LED carrier is provided with a first branch line, and the second sub-LED carrier is provided with a second branch line; One end of the first branch line is electrically connected to the second electrode pin on the first sub-LED carrier board, and the other end is electrically connected to the GND line on the back of the adjacent second sub-LED carrier board through a via hole; One end of the second branch line is electrically connected to the first electrode pin on the second sub-LED carrier board, and the other end is electrically connected to the VDD power supply line on the back side of the adjacent first sub-LED carrier board through a via hole.

12. The LED carrier board according to claim 11, characterized in that: The second electrode pin of each first carrier unit in the first sub-LED carrier is electrically connected to one of the first branch lines, or a plurality of first carrier units in the first sub-LED carrier are grouped together, and the second electrode pins in the same group are electrically connected and then electrically connected to one of the first branch lines; The first electrode pin of each second carrier unit in the second sub-LED carrier is electrically connected to one of the second branch lines, or a plurality of second carrier units in the second sub-LED carrier are grouped together, and the first electrode pins in the same group are electrically connected and then electrically connected to one of the second branch lines.

13. The LED carrier board according to claim 9, characterized in that: The value range of the thickness h of the first type of connecting line is determined by the following formula: Wherein, ρ is the resistivity of the material of the first type of connecting wire, L is the length of the first type of connecting wire, R is the resistance value of the first type of connecting wire, S1 is the total hollow area of ​​a single carrier unit, T is the physical transmittance of the LED carrier, r1 is the horizontal length from the center point of the through hole to the edge of the through hole, r2 is the vertical length from the center point of the through hole to the edge of the through hole, A is the ratio of the vertical straight side length b of the solid area to the horizontal straight side length a, w is the width of the first type of connecting wire, θ is the visible light transmittance angle, and d is the thickness of the solid area of ​​the carrier unit.

14. The LED carrier board according to claim 9, characterized in that: When the first type of sub-connection line is provided with expansion portions on both sides, the value range of the first type of connection line h is determined by the following formula: Wherein, ρ is the resistivity of the material of the first type of connecting wire, L is the length of the first type of connecting wire, R is the resistance value of the first type of connecting wire, S1 is the total hollow area of ​​a single carrier unit, T is the physical transmittance of the LED carrier, r1 is the horizontal length from the center point of the through hole to the edge of the through hole, r2 is the vertical length from the center point of the through hole to the edge of the through hole, A is the ratio of the longitudinal straight side length b of the physical area to the lateral straight side length a, W1 is the width of the equivalent circuit of the first type of connecting wire set in the expansion part, w 最大 is the maximum width of the first type of connecting line, θ is the visible light transmittance angle, and d is the thickness of the solid area of ​​the carrier unit.

15. The LED carrier board according to claim 13 or 14, characterized in that: The value range of θ is: 90°≤θ≤154°.

16. The LED carrier board according to claim 13 or 14, characterized in that : The value range of r1 is: 0.2mm≤r1≤20mm; the value range of r2 is: 0.2mm≤r2≤20mm; The value range of a is: 0.5≤a≤5mm; the value range of b is: 0.5≤b≤5mm.

17. The LED carrier board according to claim 13, characterized in that: The value range of k1 is: 0.25≤k1≤1.

18. The LED carrier board according to claim 14, characterized in that: The value range of k2 is: 0.125≤k2≤1.

19. The LED carrier board according to claim 9, characterized in that: A fourth electrode pin is arranged on the front side of the physical area of ​​the carrier unit, and the fourth electrode pin is electrically connected to a second type of sub-connection line, the second type of sub-connection line includes an interruption port, and the interruption port of the second type of sub-connection line is arranged between the third electrode pin and the fourth electrode pin.

20. The LED carrier board according to claim 19, characterized in that: The front side of the physical area of ​​the carrier unit is provided with a fifth electrode pin and a sixth electrode pin, and the second type of connection line includes a first data signal line and a second data signal line; The third electrode pin and the fourth electrode pin are electrically connected to the first data signal line, and the fifth electrode pin and the sixth electrode pin are electrically connected to the second data signal line; The second data signal line includes an interrupt port, and the interrupt port of the second data signal line is arranged between the fifth electrode pin and the sixth electrode pin.

21. The LED carrier board according to claim 20, characterized in that: The carrier unit further includes a third branch line, which is disposed on the front side of the physical area of ​​the carrier unit. One end of the third branch line is electrically connected to the third electrode pin, and the other end of the third branch line is electrically connected to the sixth electrode pin.

22. A display device, characterized in that: It comprises the LED carrier board described in any one of claims 1-8 or the LED carrier board described in any one of claims 9-21.

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