CN117456847A

CN117456847A - Flexible transparent LED display screen and device

Info

Publication number: CN117456847A
Application number: CN202311369610.4A
Authority: CN
Inventors: 叶宗和; 董宇坤; 莫春鉴; 金程; 张召伟; 刘志恒
Original assignee: Zhuhai Huacui Technology Co ltd
Current assignee: Zhuhai Huacui Technology Co ltd
Priority date: 2023-10-20
Filing date: 2023-10-20
Publication date: 2024-01-26

Abstract

The invention discloses a flexible transparent LED display screen, which comprises display panels and connecting pieces, wherein at least two display panels are arranged, one display panel is at least arranged adjacent to the other display panel, the display panel comprises LED lamp beads and a driving circuit, and the LED lamp beads are electrically connected to the driving circuit; the connecting piece is used for connecting two adjacent display panels, the connecting piece comprises a flexible transparent substrate and a conductive structure, the flexible transparent substrate is arranged at the joint of the two adjacent display panels, and the conductive structure is arranged on the flexible transparent substrate and is welded with the driving circuits of the two adjacent display panels respectively so as to electrically connect the two adjacent display panels. The flexible transparent LED display screen has the advantages of good bending performance and high transparency.

Description

Flexible transparent LED display screen and device

Technical Field

The invention relates to the technical field of display screen maintenance, in particular to a flexible transparent LED display screen and a device.

Background

The LED display screen is a display device using a light emitting diode as a light emitting element, has the advantages of high brightness, low power consumption, long service life, high reliability and the like, and is widely applied to various occasions such as advertisements, exhibition, stages, sports and the like. With the continuous development of the technology of the LED display screen, the requirements of people on the LED display screen are also higher and higher, and especially the requirements on the flexibility and the transparency of the LED display screen are also higher and higher. The flexible transparent LED display screen is a bendable LED display screen with certain light transmittance.

LED displays are typically tiled to provide a larger display size. At present, two common splicing modes of an LED display screen in the market mainly exist: one is to directly weld two display panels by welding, and the other is to connect the two display panels by a connector or plug. However, when these two splicing methods are applied to a flexible transparent LED display screen, the following drawbacks exist: the two display panels are directly welded in a welding mode, so that the display screen obtained by splicing is insufficient in bending performance and cannot be bent at will; the two display panels are connected through the connector or the plug, so that a large gap or a large bulge is generated at the spliced part, and the overall transparency and the flatness of the display screen are affected.

Therefore, there is an urgent need in the market for a new flexible transparent LED display screen that overcomes the drawbacks of the existing solutions.

Disclosure of Invention

The invention mainly aims to provide a flexible transparent LED display screen, and aims to solve the problems of insufficient flexibility and transparency of the conventional spliced flexible transparent LED display screen.

In order to achieve the above object, the flexible transparent LED display screen according to the present invention includes:

the display device comprises at least two display panels, wherein the display panels are at least arranged adjacent to one another, each display panel comprises an LED lamp bead and a driving circuit, and the LED lamp beads are electrically connected to the driving circuits; and

the connecting piece is used for connecting two adjacent display panels, the connecting piece comprises a flexible transparent substrate and a conductive structure, the flexible transparent substrate is arranged at the joint of two adjacent display panels, and the conductive structure is arranged on the flexible transparent substrate and is welded with the driving circuits of the two adjacent display panels respectively so as to electrically connect the two adjacent display panels.

In an embodiment, the conductive structure includes a conductive layer disposed on a surface of the flexible transparent substrate facing the display panel.

In one embodiment, the driving circuit includes a power supply line, a signal line and a ground line which are arranged at intervals, wherein the power supply line, the signal line and the ground line;

the conductive structure comprises a plurality of conductive layers which are in one-to-one correspondence with the power supply line, the signal line and the grounding line.

In an embodiment, the display panel has a plurality of sets of driving circuits arranged in parallel, and a plurality of sets of conductive structures are arranged on the flexible transparent substrate in parallel corresponding to the plurality of sets of driving circuits.

In an embodiment, the coverage area of the flexible transparent substrate is not smaller than the coverage area of the conductive structure.

In one embodiment, the thickness of the flexible transparent substrate is at least 2 microns and at most 1 millimeter.

In one embodiment, the conductive layer has a thickness of at least 1 micron and at most 1 millimeter.

In an embodiment, the flexible transparent LED display screen further includes an encapsulation layer, where the encapsulation layer is used to encapsulate the display panel and the connecting piece after the splicing is completed, and form an outer layer of the flexible transparent LED display screen.

In an embodiment, the resistance of the driving circuit of the flexible transparent LED display screen satisfies the following condition:

wherein R represents the resistance of the driving circuit; v represents the safe voltage drop of the flexible transparent LED display screen; p represents the distance between LED lamp beads in the flexible transparent LED display screen in the splicing direction; a represents the working current of the LED lamp bead; l is the total length of the drive circuit of the flexible transparent LED display screen.

In an embodiment, the resistance of the conductive structure is less than the resistance of the driving circuit.

According to the flexible transparent LED display screen, the connecting piece is used for connecting the adjacent two display panels, the conductive structure can achieve connection and data/power transmission of the adjacent display panels, and the flexible transparent substrate can provide certain bending performance, so that when the flexible transparent LED display screen is bent, the connecting piece can deform along with deformation of the flexible transparent LED display screen, and the joint of the display panels cannot be broken or ruptured. Therefore, the LED display screen obtained by splicing can achieve the effect of flexibility and transparency, and the problem of insufficient bending performance caused by welding can be avoided. In addition, the flexible transparent substrate and the conductive structure in the connecting piece are both materials with good light transmittance, and the influence on the light transmittance of the LED display screen is weak, so that the light transmittance of the LED display screen can be ensured. Therefore, compared with the flexible transparent LED display screen obtained by adopting the traditional splicing scheme, the flexible transparent LED display screen of the technical scheme has the advantages of good bending performance and high transparency.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic diagram of a flexible transparent LED display screen according to an embodiment of the present invention;

FIG. 2 is a schematic view of a portion of the flexible transparent LED display screen shown in FIG. 1;

FIG. 3 is a schematic structural diagram of the flexible transparent LED display screen shown in FIG. 1 when two adjacent display panels are not connected by a connecting piece;

fig. 4 is a side view of the flexible transparent LED display screen shown in fig. 1.

Reference numerals illustrate:

10. a display panel; 11. a flexible transparent substrate; 12. a driving circuit; 121. a power supply line; 122. a signal line; 123. a ground wire; 13. LED lamp beads; 20. a connecting piece; 21. a flexible transparent substrate; 22. a conductive structure; 30. encapsulation layer

The achievement of the objects, functional features and advantages of the present invention will be further described with reference to the accompanying drawings, in conjunction with the embodiments.

Detailed Description

The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

It should be noted that, if directional indications (such as up, down, left, right, front, and rear … …) are included in the embodiments of the present invention, the directional indications are merely used to explain the relative positional relationship, movement conditions, etc. between the components in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indications are correspondingly changed.

In addition, if there is a description of "first", "second", etc. in the embodiments of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, the meaning of "and/or" as it appears throughout is meant to include three side-by-side schemes, for example, "A and/or B", including the A scheme, or the B scheme, or the scheme where A and B meet at the same time. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present invention.

The invention provides a flexible transparent LED display screen.

In the embodiment of the present invention, as shown in fig. 1 to 4, the flexible transparent LED display screen includes at least two display panels 10 and a connecting member 20, wherein one display panel 10 is disposed adjacent to another display panel 10, and the connecting member 20 is used for connecting the two adjacent display panels 10.

Specifically, the display panel 10 includes a flexible transparent substrate 11, LED beads 13, and a driving circuit 12, the driving circuit 12 is disposed on the flexible transparent substrate 11, and the LED beads 13 are electrically connected to the driving circuit 12.

Specifically, the flexible transparent substrate 11 is a main base material of the display panel 10. It generally employs a flexible polymeric material or a transparent film as a substrate. The LED beads 13 are light sources of the display panel 10. The LED lamp beads 13 are typically composed of a plurality of LED chips, each of which emits light of a specific color, such as red, green, blue, and the like. The driving circuit 12 is disposed on the flexible transparent substrate 11, and is used for controlling the brightness and color of the LED lamp beads 13. The driving circuit 12 is connected with the display driving control chip and the power supply to transmit current and driving signals to the LED lamp beads 13, and the luminous intensity and the color of the LED lamp beads 13 are controlled by adjusting the current and the signals, so that the control and the adjustment of the display content are realized.

Further, the connecting piece 20 includes a flexible transparent substrate 21 and a conductive structure 22, the flexible transparent substrate 21 is disposed at a connection portion of two adjacent display panels 10, and the conductive structure 22 is disposed on the flexible transparent substrate 21 and is welded to the driving circuits 12 of two adjacent display panels 10 respectively to electrically connect the two adjacent display panels 10.

Specifically, the flexible transparent substrate 21 generally employs a flexible polymer material or a transparent film as a base. These materials have good flexibility and bendability and can be bent, curled or stretched at the joint without breaking or damaging. In addition, they have high transparency, so that light can pass through, and a transparent display effect is realized.

Further, the conductive structure 22 is typically made of a material having good conductive properties, such as a metal wire, a thin film conductive layer, or the like. These materials are capable of conducting electrical current efficiently and are flexible and transparent enough to accommodate the needs of flexible transparent displays. In the technical solution of the present application, after the adjacent display panels 10 are electrically connected through the conductive structures 22, the current can be smoothly transmitted in the connecting piece 20, so as to transmit signals and electric energy to the adjacent display panels 10.

It can be appreciated that, in the flexible transparent LED display screen according to the technical solution of the present application, two adjacent display panels 10 are connected through the connecting piece 20, wherein the conductive structure 22 can realize connection and data/power transmission of the adjacent display panels 10, and the flexible transparent substrate 21 can provide a certain bending performance, so that when the flexible transparent LED display screen is bent, the connecting piece 20 can deform along with deformation of the flexible transparent LED display screen, and the connection part of the display panels 10 cannot be broken or ruptured. Therefore, the LED display screen obtained by splicing can achieve the effect of flexibility and transparency, and the problem of insufficient bending performance caused by welding can be avoided. In addition, the flexible transparent substrate 21 and the conductive structure 22 in the connecting piece 20 are both materials with good light transmittance, and have weak influence on the light transmittance of the LED display screen, so that the light transmittance of the LED display screen can be ensured. Therefore, compared with the flexible transparent LED display screen obtained by adopting the traditional splicing scheme, the flexible transparent LED display screen of the technical scheme has the advantages of good bending performance and high transparency.

In some embodiments, the flexible transparent substrate 21 is the same material as the flexible transparent substrate 11. By the arrangement, consistency of the whole display screen can be maintained. The adjacent display panels 10 and the connecting members 20 will have similar physical and optical properties without causing uneven display effects due to material differences. In addition, the flexible transparent substrate 21 and the flexible transparent substrate 11 made of the same material can simplify the manufacturing flow and process, improve the production efficiency, and help to reduce the manufacturing cost of the flexible transparent LED display screen.

Of course, the design of the present application is not limited to this, and in other embodiments, there are cases where different materials are used for the flexible transparent substrate 21 and the flexible transparent substrate 11. This may be to meet specific design requirements, such as using different materials in different areas to achieve specific transparency, bending properties, or flexibility. In this case, special attention needs to be paid to compatibility between materials and stability of connection, ensuring that the overall performance of the display panel 10 is not affected.

Alternatively, the flexible transparent substrate 11 and the flexible transparent substrate 21 may be made of polyethylene terephthalate (PET), polyetheretherketone (PEEK), polycarbonate (PC), transparent polyimide (CPI), transparent nylon (CPA), or the like. The materials have better flexibility and transparency, and can be suitable for preparing flexible transparent display screens.

In some embodiments, the thickness of the flexible transparent substrate 21 is at least 2 microns and at most 1 millimeter. A selection within this range may provide adequate flexibility and strength while maintaining adequate transparency and reliability.

In particular, thinner flexible transparent substrates 21 (e.g., 2 microns to tens of microns) are typically used in applications requiring higher flexibility and bending properties. Such substrates can be more easily bent, curled or stretched, and are suitable for display designs requiring large deformations or complex curved surfaces. Thicker flexible transparent substrates 21 (e.g., tens of microns to 1 millimeter) generally provide greater mechanical strength and stability. They may better protect the circuitry and components of the display panel 10 and provide a longer useful life.

By way of example, the thickness of the flexible transparent substrate 21 may be set to 2 microns, 5 microns, 10 microns, 20 microns, 30 microns, 40 microns, 50 microns, 60 microns, 70 microns, 80 microns, 90 microns, 100 microns, 200 microns, 300 microns, 400 microns, 500 microns, 600 microns, 700 microns, 800 microns, 900 microns, 1 millimeter, etc.

In some embodiments, the conductive structure 22 includes a conductive layer disposed on a side surface of the flexible transparent substrate 21 facing the display panel 10.

Specifically, the conductive layer is generally made of a conductive material such as a conductive oxide, a conductive polymer, or a metal thin film. The conductive layer and the driving circuit 12 of the display panel 10 may be electrically connected by soldering or other electrical connection methods.

It can be appreciated that the conductive layer is directly disposed on the surface of the flexible transparent substrate 21 to serve as the conductive structure 22, so that the arrangement scheme is relatively simple, and no additional connecting member 20 or assembly is required, so that the material cost and the production cost of the display panel 10 can be reduced on the basis of ensuring the reliability of the electrical connection of the adjacent display panels 10. In addition, since the conductive material is arranged on the surface of the flexible transparent substrate 21, the structural integrity of the flexible transparent substrate 21 can be ensured, and the structural strength of the flexible transparent substrate 21 can be ensured, so that the connecting piece 20 can provide enough support for the connection of the adjacent display panels 10 and the bending of the flexible transparent LED display screen.

In addition, the conductive structure 22 is configured as a conductive layer, and the bending performance of the flexible display screen can be maintained to the maximum extent by using the bending property of the conductive layer.

Of course, the design of the present application is not limited thereto, and in other embodiments, conductive tape, elastic conductive wire, elastic conductive pad, elastic conductive coating, etc. may be used as the conductive structure 22.

Alternatively, the conductive layer may be formed on the flexible transparent substrate 21 by sputtering, electroplating, electroless plating, calendaring, or the like. These methods may be selected as desired to meet the requirements of different applications.

Alternatively, the material of the conductive layer may be gold, silver, copper, nickel, aluminum, alloys or composite materials thereof, etc.; or a composite material of plastic and metal (namely metal colloid paint). In addition, the conductive layer can also be a colloid paint made of epoxy resin, acrylic resin or other polyester materials in the C stage or the B stage and metal powder such as gold, silver, copper, nickel, aluminum and alloys or composite materials thereof.

In some embodiments, the thickness of the conductive layer is at least 1 micron and at most 1 millimeter. This range may meet the needs of different applications. In particular, thinner conductive layers (e.g., 1 micron to tens of microns) generally have higher flexibility and transparency, suitable for applications requiring high flexibility and transparency. Thicker conductive layers (e.g., tens to hundreds of microns) provide better electrical conductivity and mechanical strength for applications requiring higher current transmission and structural support.

In practical production, the thickness of the conductive layer may be determined according to application requirements, characteristics of the conductive material, and manufacturing process, so as to balance factors such as conductive performance, mechanical strength, and transparency.

By way of example, the thickness of the conductive layer may be set to 1 micron, 10 microns, 20 microns, 30 microns, 40 microns, 50 microns, 100 microns, 200 microns, 300 microns, 400 microns, 500 microns, 600 microns, 700 microns, 800 microns, 900 microns, 1 millimeter, etc.

In some embodiments, the driving circuit 12 includes a power supply line 121, a signal line 122, and a ground line 123 that are disposed at intervals.

Specifically, the power supply line 121 is a line for supplying electric power, and connects a power source to the LED beads 13 and other electronic components to ensure their normal operation. The signal line 122 is used for transmitting control signals to control the brightness, color, display mode and the like of the LED lamp beads 13. The ground line 123 is used to establish a ground connection to ensure stability and tamper resistance of the system.

In order to improve the heat dissipation capability and the light transmittance of the driving circuit 12, the power supply lines 121, the signal lines 122, and the ground lines 123 are arranged in a grid shape.

Further, the conductive structure 22 includes a plurality of conductive layers corresponding to the power supply lines 121, the signal lines 122 and the ground lines 123, and the plurality of conductive layers are used for respectively connecting the power supply lines 121, the signal lines 122 and the ground lines 123 on the adjacent display panels 10.

Specifically, in the present embodiment, the conductive structure 22 includes three conductive layers, and the three conductive layers are connected one by one to the power supply lines 121, the signal lines 122, and the ground lines 123 on the adjacent display panels 10, respectively. In some embodiments, the conductive structure 22 is also configured to include a corresponding number of conductive layers, since the driving circuit 12 may include two or more signal lines 122 at the same time.

It will be appreciated that the plurality of conductive layers are provided to connect the power supply lines 121, the signal lines 122 and the ground lines 123 on the adjacent display panels 10, respectively, so that on one hand, different circuits can be effectively isolated, and interference and cross interference between the circuits can be reduced. This helps to improve the stability and reliability of the circuit, ensuring the accuracy and consistency of signal transmission. On the other hand, the number of channels for current transmission can be increased, so that the current transmission capacity and reliability of the whole circuit are improved. In addition, the provision of a plurality of conductive layers can enhance the bending capability of the connector 20 on the basis of ensuring the structural strength of the connector 20, so as to ensure the mechanical strength and bending performance of the flexible transparent LED display panel 10.

Accordingly, the width of the conductive layer matches the driving circuit 12 to which it is connected. This arrangement ensures good electrical connection between the conductive layer and the drive circuit 12 so that the conductive layer can effectively transmit power and signals. At the same time, this arrangement may also ensure that the connector 20 has sufficient strength to support the bending of the flexible transparent LED display screen.

Alternatively, the material of the driving circuit 12 may be gold, silver, copper, nickel, aluminum, alloy thereof or composite material thereof, or nano silver, indium tin oxide, conductive polymer, etc.

In some embodiments, the thickness of the drive circuit 12 is at least 1 nanometer and at most 0.5 millimeters. This range of selection takes into account a number of factors including circuit performance, flexibility performance and manufacturing process limitations.

In particular, a thinner thickness of the driving circuit 12 may provide better flexibility, so that the display screen may be more freely bent and twisted, adapting to application scenarios of various curved surfaces and shapes. In addition, the thinner driving circuit 12 can reduce the thickness of the whole display screen, make it lighter and thinner, and increase flexibility and portability. The thicker and thinner driving circuit 12 can improve the circuit performance of the flexible transparent LED display screen to carry stronger current.

By way of example, the thickness of the drive circuit 12 may be set to 1 nm, 5 nm, 10 nm, 20 nm, 30 nm, 40 nm, 50 nm, 60 nm, 70 nm, 80 nm, 90 nm, 100 nm, 200 nm, 300 nm, 400 nm, 500 nm, 600 nm, 700 nm, 800 nm, 900 nm, 1 micron, 5 microns, 10 microns, 20 microns, 30 microns, 40 microns, 50 microns, 60 microns, 70 microns, 80 microns, 90 microns, 100 microns, 200 microns, 300 microns, 400 microns, 500 microns, etc.

In some embodiments, the display panel 10 has multiple sets of driving circuits 12 arranged in parallel, and multiple sets of conductive structures 22 are arranged on the flexible transparent substrate 21 in parallel corresponding to the multiple sets of driving circuits 12.

In particular, in a flexible transparent LED display screen, in order to improve the circuit efficiency and response speed of the display panel 10, a plurality of sets of driving circuits 12 arranged in parallel are often employed. This means that there are multiple independent sets of driving circuits 12 on the display panel 10, each set being responsible for controlling and driving the LED light beads 13 in a specific area.

To achieve such parallel arrangement, a plurality of sets of conductive structures 22 are provided on the same flexible transparent substrate 21 in parallel to a plurality of sets of driving circuits 12. Each conductive structure 22 is connected to its corresponding drive circuit 12 and is responsible for transmitting current and signals to the respective LED light beads 13. By the design, a plurality of LED lamp beads 13 can be activated simultaneously, parallel processing is realized, and therefore the refresh rate and the image quality of the display panel 10 are improved.

It can be appreciated that the plurality of groups of conductive structures 22 are arranged on the same flexible transparent substrate 21, so that the structural strength of the connecting piece 20 can be improved, and the bending performance of the flexible transparent LED display screen can be ensured to the greatest extent; moreover, the arrangement can also ensure the transparency consistency and the appearance integrity of the connection parts of the adjacent display panels 10 so as to ensure the aesthetic property of the flexible transparent LED display screen. In addition, the plurality of groups of conductive structures 22 are arranged on the same flexible transparent substrate 21, which is more beneficial to reducing the material cost and the production cost of the display screen.

Of course, the design of the present application is not limited to this, and in other embodiments, a plurality of connectors 20 may be disposed corresponding to a plurality of sets of driving circuits 12, or two or more sets of driving circuits 12 may be connected by one connector 20.

In some embodiments, the footprint of the flexible transparent substrate 21 is not less than the footprint of the conductive structures 22.

Specifically, the coverage area of the flexible transparent substrate 21 is not smaller than the coverage area of the conductive structure 22, which means that the size of the flexible transparent substrate 21 is larger than or equal to the size of the conductive structure 22, so as to ensure that the substrate can completely cover the conductive structure 22.

It should be noted that the flexible transparent substrate 21 is subjected to a certain stress when it is bent or twisted, and by increasing the coverage area of the substrate, the stress can be distributed more uniformly, and the possibility of local stress concentration can be reduced. This helps to reduce the risk of fatigue and damage to the substrate, improving the reliability and lifetime of the display. So arranged, the connector 20 can provide sufficient support to ensure the bending performance and structural strength of the flexible transparent LED display screen. This design can help reduce the area of weakness in the flexible transparent substrate 21 and ensure that the entire display screen does not become overstressed or broken when bent or twisted, improving the reliability of the display screen and extending its lifetime.

In some embodiments, the flexible transparent LED display further includes an encapsulation layer 30, where the encapsulation layer 30 encapsulates the display panel 10 and the connector 20 that are spliced together, and forms an outer layer of the flexible transparent LED display.

Specifically, the encapsulation layer 30 can protect the flexible transparent substrate 21, the conductive structure 22, the driving circuit 12 and the LED lamp beads 13, and encapsulate the upper and lower surfaces of all the display panels 10, so that the whole LED display screen has enough toughness and bending resistance after being spliced. In addition, the encapsulation layer 30 may also prevent damage to the display panel 10 and the connector 20 by external factors such as dust, moisture, chemicals, etc., and protect it from mechanical impact and physical impact.

Alternatively, the encapsulation layer 30 is generally made of a transparent or translucent material to maintain the transparency and flexibility characteristics of the display panel 10. Common encapsulating materials include polymeric materials such as Ethylene Vinyl Acetate (EVA), polyvinyl butyral Ding Quanzhi (PVB), ionic interlayers (SGP), thermoplastic polyurethane elastomer rubber (TPU), thermoplastic elastomer (TPE), silicone, or composites of the above. The materials have good flexibility and transparency and can adapt to the bending and curved shape of the display screen.

In some embodiments, the resistance of the drive circuit of the flexible transparent LED display screen satisfies the following condition:

wherein R represents the resistance of the driving circuit;

v represents the safe voltage drop of the flexible transparent LED display screen, namely the voltage drop allowed by the display screen under the normal working condition;

p represents the distance between the LED lamp beads in the flexible transparent LED display screen in the splicing direction, namely the distance between the adjacent LED lamp beads;

a represents the working current of LED lamp beads in the flexible transparent LED display screen, namely the current of each LED lamp bead when the LED display screen works at normal brightness;

l represents the length of the driving circuit of the flexible transparent LED display screen, i.e. the total length of the driving circuit.

Specifically, when designing the resistance of the flexible transparent LED display screen, we can set the number of LED lamp beads 13 connected in series on the driving circuit 12 as N, set the length of the non-voltage drop driving circuit 12 (including the length of the conductive structure 22 on the connecting piece 20) as L, and set the distance between each lamp strain as P.

Then, the number N of LED beads 13 connected in series on the driving circuit 12 is:

N＝L/P……(1)；

total current a to be sustained by no-voltage drop driving circuit 12 _Total The method comprises the following steps:

A _Total ＝A×N……(2)；

maximum resistance R of no-voltage-drop driving circuit 12 _max The method comprises the following steps:

R _max ＝V/A _Total ……(3)；

by transforming the formulas (1), (2) and (3), we can obtain the maximum resistance R of the voltage-drop-free driving circuit 12 _max The method comprises the following steps:

based on the formula (4), we can obtain the design condition of the resistance R of the middle driving circuit required by the normal operation of the flexible transparent LED display screen, namely:

through the design condition, the driving circuit of the flexible transparent LED display screen can be limited, so that the excessively high voltage drop and power consumption caused by overlarge resistance of the spliced LED display screen are avoided, and the normal operation of the spliced flexible transparent LED display screen can be ensured.

It should be noted that the distance between each of the single beads connected in series may be equally or unequally distributed along the length direction of the electrode, which is not limited thereto.

It should be further noted that the parameters of the length of the driving circuit 12, the number of the lamp beads, the distance between the lamp beads, the safety voltage drop, etc. may be obtained from the design standard of the flexible transparent LED display screen, or may be obtained according to the calculation test of the corresponding sample screen.

In some embodiments, the resistance of the conductive structure 22 is less than the resistance of the drive circuit 12.

It will be appreciated that the conductive structure 22 is the key part responsible for connecting the driving circuit 12 with the LED beads 13 of the display panel 10. If the resistance of the conductive structure 22 is large and the resistance of the driver circuit 12 is small, a large impedance difference is encountered between the conductive structure 22 and the driver circuit 12 by the current. This results in a large voltage drop at the conductive structure 22, which may cause unstable current distribution and operational problems.

Based on this, the resistance of the conductive structure 22 is set smaller than the resistance of the driving circuit 12. In this way, by reducing the resistance of the conductive structure 22, the voltage drop at the conductive structure 22 may be reduced, ensuring a more uniform distribution of current between the drive circuit 12 and the conductive structure 22. This helps to improve the stability, reliability and performance of the display screen and to facilitate accurate calculation of the resistance limits of the drive circuit 12.

The foregoing description is only of the preferred embodiments of the present invention and is not intended to limit the scope of the invention, and all equivalent structural changes made by the description of the present invention and the accompanying drawings or direct/indirect application in other related technical fields are included in the scope of the invention.

Claims

1. A flexible transparent LED display screen, comprising:

2. The flexible transparent LED display of claim 1, wherein the conductive structure comprises a conductive layer disposed on a side surface of the flexible transparent substrate facing the display panel.

3. The flexible transparent LED display of claim 2, wherein the drive circuit comprises power supply lines, signal lines, and ground lines arranged at intervals;

4. A flexible transparent LED display as recited in claim 3, wherein the display panel has a plurality of sets of driving circuits arranged in parallel, and a plurality of sets of the conductive structures are arranged in parallel on the flexible transparent substrate corresponding to the plurality of sets of driving circuits.

5. The flexible transparent LED display of claim 4, wherein the flexible transparent substrate has a footprint that is not less than the footprint of the conductive structure.

6. The flexible transparent LED display of claim 4, wherein the thickness of the flexible transparent substrate is at least 2 microns and at most 1 millimeter.

7. The flexible transparent LED display of claim 4, wherein the conductive layer has a thickness of at least 1 micron and at most 1 millimeter.

8. The flexible transparent LED display of claim 1, further comprising an encapsulation layer for encapsulating the spliced display panel and the connector and forming an outer layer of the flexible transparent LED display.

9. The flexible transparent LED display of claim 1, wherein the resistance of the drive circuit of the flexible transparent LED display satisfies the following condition:

10. A flexible transparent LED display as claimed in claim 1 or 9, wherein the resistance of the conductive structure is less than the resistance of the drive circuit.