CN215868475U - Flexible transparent LED display screen - Google Patents
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- CN215868475U CN215868475U CN202120750156.7U CN202120750156U CN215868475U CN 215868475 U CN215868475 U CN 215868475U CN 202120750156 U CN202120750156 U CN 202120750156U CN 215868475 U CN215868475 U CN 215868475U
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Abstract
The utility model discloses a flexible transparent LED display screen which comprises a flexible transparent substrate, a conductive layer, a first low-reflection layer, a welding layer and LED lamp beads, wherein the conductive layer is arranged on one side or two sides of the flexible transparent substrate and is used for forming lamp bead circuits, and at least part of the lamp bead circuits are arranged in a grid shape; the first low-reflection layer is arranged on the conductive layer, and the reflectivity of the first low-reflection layer is less than 35%; the welding layer is arranged on the first low-reflection layer or the conducting layer and is used for forming a welding disc of the lamp bead circuit; the LED lamp beads are welded on the welding layer. The flexible transparent LED display screen has the advantages of low cost and high light transmission.
Description
Technical Field
The utility model relates to the technical field of LED display, in particular to a flexible transparent LED display screen.
Background
Transparent LED displays are gradually used in the market and are developed in various product forms. A transparent LED display screen technology in which LED lamps are arrayed on a transparent substrate has started to appear. The LED display screen generally adopts transparent conductive materials to manufacture a power supply circuit and a signal transmission circuit of the LED lamp bead.
The transparent conductive material is usually ITO (indium tin oxide), but ITO is expensive and has low economic efficiency. Instead, an LED display screen using copper as a conductive material appears in the market, but the light reflection rate of the copper wire is high, which is not beneficial to improving the transparency of the LED display screen.
Therefore, it is desirable to provide an LED display panel with low cost and high transparency.
SUMMERY OF THE UTILITY MODEL
The utility model mainly aims to provide a flexible transparent LED display screen, and aims to provide an LED display screen which is low in cost and high in transparency.
In order to achieve the above object, the flexible transparent LED display screen provided by the present invention comprises a flexible transparent substrate, a conductive layer, a first low reflection layer, a welding layer and LED lamp beads, wherein,
the conducting layer is arranged on one side or two sides of the flexible transparent substrate and is used for forming lamp bead circuits, and at least part of the lamp bead circuits are arranged in a grid shape;
the first low-reflection layer is arranged on the conductive layer, and the reflectivity of the first low-reflection layer is less than 35%;
the welding layer is arranged on the first low-reflection layer or the conducting layer and is used for forming a welding disc of the lamp bead circuit;
the LED lamp beads are welded on the welding layer.
In one embodiment, the thickness of the first low reflection layer is between 1nm and 3000 nm.
In one embodiment, the thickness of the first low reflection layer is between 20nm and 250 nm.
In one embodiment, the lamp bead circuit further comprises an adhesive layer,the bonding layer is arranged on the flexible transparent substrate, the conductive layer is bonded on the flexible transparent substrate through the bonding layer, and the bonding force between the bonding layer and the flexible transparent substrate is not less than 0.5kg/cm2。
In one embodiment, the thickness of the adhesive layer is between 1nm and 3000 nm.
In one embodiment, the thickness of the adhesive layer is 20nm to 250 nm.
In an embodiment, the lamp bead circuit further includes a second low reflection layer, the second low reflection layer is disposed on the adhesive layer, and the reflectivity of the second low reflection layer is not greater than 35%.
In one embodiment, the thickness of the conductive layer is between 0.1um and 300 um.
In one embodiment, the thickness of the conductive layer is between 0.5um and 50 um.
In one embodiment, when the conductive layers are disposed on both sides of the flexible transparent substrate, the projections of the lamp bead circuits on both sides of the flexible transparent substrate on the flexible transparent substrate are overlapped or staggered.
The utility model provides a flexible transparent LED display screen, through set up first low reflection stratum on the conducting layer, and the reflectivity of controlling first low reflection stratum is less than 35%, so, the reflectivity of conducting layer is reduced on the first low reflection stratum of accessible, with the reflection rate of lamp pearl circuit on reducing transparent LED display screen, thereby, even adopt the lamp pearl circuit of the transparent LED display screen of conductive material (such as copper, nickel, iron etc.) preparation of choosing for use but high reflection rate, still can guarantee the low visuality of lamp pearl circuit, and then can reduce the cost of manufacture of high transparency's LED display screen. In addition, through making at least part lamp pearl circuit be latticed setting, still be favorable to reducing the area occupied of lamp pearl circuit to improve transparent display panel's light transmissivity, thereby can further improve the transparency degree of transparent LED display screen. Therefore, compared with a common transparent LED display screen, the flexible transparent LED display screen has the advantages of low cost and high light transmittance.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
FIG. 1 is a schematic structural diagram of a flexible transparent LED display screen according to an embodiment of the present invention;
FIG. 2 is an enlarged view of a portion of FIG. 1 at A;
FIG. 3 is a schematic cross-sectional view of the embodiment shown in FIG. 1;
FIG. 4 is a schematic diagram of a lamp bead circuit structure on two sides of a flexible transparent substrate in another embodiment of the flexible transparent LED display screen of the utility model;
FIG. 5 is a schematic diagram of a lamp bead circuit structure on two sides of a flexible transparent substrate in another embodiment of the flexible transparent LED display screen according to the utility model;
FIG. 6 is a schematic cross-sectional view of a flexible transparent LED display screen according to another embodiment of the present invention;
fig. 7 is a schematic cross-sectional view of a flexible transparent LED display according to another embodiment of the present invention.
The reference numbers illustrate:
10. a flexible transparent substrate; 20. a conductive layer; 20a, a lamp bead circuit; 20b, a lamp bead welding area; 30. a first low reflection layer; 40. welding the layers; 40a, a bonding pad; 50. LED lamp beads; 51. welding feet; 60. an adhesive layer; 70. second low reflection layer
The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that, if directional indications (such as up, down, left, right, front, and back … …) are involved in the embodiment of the present invention, the directional indications are only used to explain the relative positional relationship between the components, the movement situation, and the like in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indications are changed accordingly.
In addition, if there is a description of "first", "second", etc. in an embodiment 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 relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, the meaning of "and/or" appearing throughout is to include three juxtapositions, exemplified by "A and/or B" including either scheme A, or scheme B, or a scheme in which both A and B are satisfied. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.
The utility model provides a flexible transparent LED display screen.
In the embodiment of the utility model, as shown in fig. 1 to 3, the flexible transparent LED display screen includes a flexible transparent substrate 10, a conductive layer 20, a first low reflection layer 30, a welding layer 40, and LED beads 50.
Specifically, the flexible transparent substrate 10 may be glass or a transparent polymer base material. The glass substrate includes, but is not limited to, soda-silica glass, soda-lime-silica glass, potash-silica glass, and alumino-silica glass. The transparent polymer substrate includes, but is not limited to, PET (Polyethylene terephthalate, Chinese name), PMMA (polymethyl methacrylate), PI (polyimide), PC (Polycarbonate ). The substrate is made of a material with flexibility and transparency, so that the transparency of the LED display screen is improved, and free bending of the LED display screen is realized.
Optionally, the light transmittance of the flexible transparent substrate 10 is greater than 70%, and preferably greater than 90%. Illustratively, the light transmittance of the flexible transparent substrate 10 may be 71%, 72%, 73%, 74%, 75%, 76%, 77%, 78%, 79%, 80%, 81%, 82%, 83%, 84%, 85%, 86%, 87%, 88%, 89%, 90%, 91%, 92%, 93%, 94%, 95%, 96%.
It can be understood that the transparent flexible substrate with the light transmittance of more than 70% or even more than 90% is selected, which is beneficial to improving the transparency of the LED display screen.
The conductive layer 20 is provided on one side or both sides of the flexible transparent substrate 10, and specifically, the conductive layer 20 may be provided on one side of the flexible transparent substrate 10, or the conductive layers 20 may be provided on both sides of the flexible transparent substrate 10. Among them, when the conductive layer 20 is provided only on one side of the flexible transparent substrate 10, only one side of the flexible transparent LED display panel may be used to display a picture; when the conductive layers 20 are disposed on both sides of the flexible transparent substrate 10, both sides of the flexible transparent LED display screen can be used for displaying images. Specifically, the conductive layer 20 may be selectively disposed on one side or both sides of the flexible transparent substrate 10 according to the requirement of time product.
Further, this conducting layer 20 is used for forming LED display screen lamp pearl circuit 20a, and this lamp pearl circuit 20a is at least partly latticed setting. Specifically, the lamp bead circuit 20a includes an electrode line and a signal line, the electrode line is used for supplying power to the LED lamp bead 50, and the electrode line includes a positive electrode line and a negative electrode line; and the signal line is used for transmitting control signals between the LED lamp bead 50 and the control chip (module). In this embodiment, anodal electrode line and negative pole electrode line all are latticed setting (that is the electrode line is the net setting), can understand, set up the electrode line into latticed, are favorable to improving the light transmissivity of lamp pearl circuit 20a, and then are favorable to improving the transparency of flexible transparent LED display screen. In addition, the grid-shaped electrode wires are also favorable for improving the heat dissipation capacity of the electrode wires so as to ensure the stability of power supply of the electrode wires.
Specifically, the first low reflection layer 30 is disposed on the conductive layer 20, and the reflectivity of the first low reflection layer 30 is less than 35%. The reflectance is understood to be a light reflectance, and the reflectance of the first low reflection layer 30 is less than 35%, that is, the light reflectance of the first low reflection layer 30 is less than 35%. It is worth noting that the visibility of the object is higher when the light reflectance of the surface of the object is higher, whereas the visibility of the object is lower when the light reflectance of the surface of the object is lower. Generally, when the reflectance is less than 35%, the visibility of an object under light is low. Therefore, the first low-reflection layer 30 with the reflectivity lower than 35% is covered on the conducting layer 20, and the reflectivity of the conducting layer 20 can be reduced through the first low-reflection layer 30, so that the reflectivity of the lamp bead circuit 20a in the LED display screen can be reduced. Therefore, even if conductive materials (such as copper, nickel, iron and the like) with low cost and high light reflection rate are selected to manufacture the lamp bead circuit 20a of the transparent LED display screen, the low visibility of the lamp bead circuit 20a can be still ensured, and the manufacturing cost of the LED display screen with high transparency can be further reduced.
Specifically, the welding layer 40 is disposed on the first low reflection layer 30 or the conductive layer 20 to form a pad 40a of the lamp bead circuit 20a, the pad 40a is disposed corresponding to the lamp bead welding area 20b of the lamp bead circuit 20a, specifically, the lamp bead circuit 20a of the LED display screen has a plurality of lamp bead welding areas 20b, in the lamp bead welding area 20b, one pad 40a is disposed on each of the positive electrode line, the negative electrode line and each of the signal lines, and the welding layer 40 is disposed in the lamp bead welding area 20b to form a pad 40a of the electrode line and the signal line.
Illustratively, the material of the solder layer 40 is typically tin.
Specifically, the LED lamp beads 50 have a plurality of solder fillets 51, the solder fillets 51 correspond to the respective pads 40a in the lamp bead welding area 20b one to one, and the LED lamp beads 50 are welded to the welding layer 40 through the solder fillets 51.
It can be understood, this application technical scheme's flexible transparent LED display screen, through set up first low reflection stratum 30 on conducting layer 20, and the reflectivity of controlling first low reflection stratum 30 is less than 35%, so, the reflectivity of accessible first low reflection stratum 30 reduces conducting layer 20, with the reflection rate that reduces lamp pearl circuit 20a on the transparent LED display screen, thereby, even adopt the lamp pearl circuit 20a of the transparent LED display screen of the conductive material (such as copper, nickel, iron etc.) preparation of choosing for use but high reflection rate, still can guarantee the low visuality of lamp pearl circuit 20a, and then the cost of manufacture of the LED display screen of high transparency. In addition, through making at least part lamp pearl circuit 20a be latticed setting, still be favorable to reducing the area occupied of lamp pearl circuit 20a to improve transparent display panel's light transmissivity, thereby can further improve the transparency of transparent LED display screen. Therefore, compared with a common transparent LED display screen, the flexible transparent LED display screen has the advantages of low cost and high light transmittance.
As shown in fig. 2, in an embodiment, when the conductive layers 20 are disposed on both sides of the flexible transparent substrate 10, projections of the bead lines 20a on both sides of the flexible transparent substrate 10 on the flexible transparent substrate 10 are overlapped. That is, the lamp bead lines 20a on both sides of the flexible transparent substrate 10 correspond to each other. Set up like this, can guarantee to be the uniformity that mesh set up in the lamp pearl circuit 20a (the electrode line) of latticed, and then be favorable to improving the transparency of flexible transparent LED display screen. Moreover, the design of the lamp bead circuits 20a with the same two sides is also beneficial to reducing the manufacturing cost of the flexible transparent LED display screen.
As shown in fig. 4, fig. 4 is a schematic view of a structure of lamp bead circuits on two sides of a flexible transparent substrate in an embodiment of the flexible transparent LED display screen of the present invention, in this embodiment, two sides of a flexible transparent substrate 10 are both provided with a conductive layer 20, and projections of lamp bead circuits 20a on two sides of the flexible transparent substrate 10 on the flexible transparent substrate 10 are mutually staggered.
Specifically, the lamp bead lines 20a on both sides of the flexible transparent substrate 10 are staggered with each other to form a grid structure in cooperation.
As shown in fig. 5, fig. 5 is a schematic diagram of a lamp bead circuit structure on two sides of a flexible transparent substrate in another embodiment of the flexible transparent LED display screen of the present invention; in this embodiment, the two sides of the flexible transparent substrate 10 are both provided with the conductive layers 20, and the projections of the lamp bead lines 20a on the two sides of the flexible transparent substrate 10 on the flexible transparent substrate 10 are mutually staggered.
Specifically, the lamp bead lines 20a on the two sides of the flexible transparent substrate 10 are respectively arranged in a grid shape, and the lamp bead lines 20a on the two sides of the flexible transparent substrate 10 are mutually staggered to form a new grid structure in a matching manner.
Specifically, the material of the conductive layer 20 is a metal or a mixture of a metal and a high molecular substance. Specifically, the metal includes pure metals and metal alloys, wherein the pure metals include, but are not limited to, nickel, titanium, chromium, copper, and iron. The alloy can be an alloy of at least two metals of nickel, titanium, chromium, copper and iron. The high molecular substance includes, but is not limited to, non-volatile acrylic resin, non-volatile epoxy-acrylic resin, modified products of any of the three, silicone, and solvent-free thermoplastic resin. Exemplary, solvent-free thermoplastic resins include, but are not limited to, hot melt adhesives, polyphenylene sulfide (PPS), Polysulfones (PSU), Polysulfones (PES), polyether ether ketone (PEEK), aromatic polyester Liquid Crystal Polymers (LCP), Polyetherimides (PEI), Polyamideimides (PAI), Polyacetals (POM), chinlon (nylon) (PA), poly (propylene carbonate) (PC), polybutylene terephthalate (PBT), polyethylene terephthalate (dacron) (PET), polyphenylene oxides (polyoxy-xylene, PPE, PPO), ABS resins (ABS), styrene-acryl-acrylonitrile (ASA), Polystyrene (PS), polymethyl methacrylate (PMMA), styrene copolymers (MS), Cellulose Acetate (CA), Thermoplastic Polyurethane (TPU), thermoplastic polyester elastomers (TPEE), styrenic elastomers (TPS), and the like, Nylon 12 elastomer (PAE), Polytetrafluoroethylene (PTFE), vinylon (vinylon), polypropylene (PP), Polyethylene (PE), ethylene/vinyl acetate copolymer (EVA), polyvinyl chloride (PVC), and the like.
It can be understood that the conductive layer 20 made of metal has the advantage of good conductivity, and the conductive layer 20 made of a mixture of metal and polymer material can improve the transparency of the conductive layer 20 and the adhesion of the conductive layer 20 on the transparent substrate on the basis of ensuring the conductivity of the conductive layer 20.
Specifically, the thickness of the conductive layer 20 is between 0.1um and 300 um. If the thickness of the conductive layer 20 is too thin, if the thickness is smaller than 0.1um, the conductivity of the bead circuit 20a formed by the conductive layer 20 is weak, and the power supply capacity is weak, so that the display effect of the LED display screen, such as brightness and uniformity, can be influenced, and if the thickness of the conductive layer 20 is too large, if the thickness is larger than 300um, the light transmittance of the conductive layer 20 can be influenced, so that the transparency of the LED display screen is influenced, and the manufacturing cost of the LED display screen can be increased. Therefore, the thickness of the conductive layer 20 is limited to 0.1um to 300um, and the conductivity, the transparency and the manufacturing cost of the LED display screen of the conductive layer 20 can be considered at the same time.
Illustratively, the thickness of the conductive layer 20 can be 0.1um, 0.2um, 0.3um, 0.4um, 0.5um, 0.6um, 0.7um, 0.8um, 0.9um, 1um, 2um, 3um, 4um, 5um, 6um, 7um, 8um, 9um, 10um, 20um, 30um, 40um, 50um, 60um, 70um, 80um, 90um, 100um, 110um, 120um, 130um, 140um, 150um, 160um, 170um, 180um, 190um, 200um, 210um, 220um, 230um, 240um, 250um, 300um, 400um, 500um, 600um, 700um, 800um, 900um, 1000um, 1500um, 2000um, 2500um, 3000um, etc.
Preferably, the thickness of the conductive layer 20 is between 0.5um and 50 um. Within the range of 0.5um to 50um, the conductive layer 20 can be ensured to have good conductivity and transparency, and the manufacturing cost of the LED display screen can be effectively controlled.
In one embodiment, the thickness of the first low reflection layer 30 is between 1nm and 3000 nm. Among them, if the thickness of the first low reflection layer 30 is too thin, for example, less than 1nm, the coverage effect of the conductive layer 20 is reduced on the one hand, and the reduction of the reflectance of the conductive layer 20 cannot be ensured; on the other hand, the manufacturing process of the first low reflection layer 30 is complicated, which is not favorable for cost control. If the thickness of the first low reflection layer 30 is too thick, for example, greater than 3000nm, it is not favorable to control the reflectivity and transmittance of the first low reflection layer 30, and the transparency of the LED display screen is affected. In addition, the first low reflection layer 30 is too thick, which also increases the cost of the LED display screen. Therefore, the thickness of the first low reflection layer 30 is limited to 1 nm-3000 nm, and the low reflectivity of the first low reflection layer 30 and the production cost of the LED display screen can be considered at the same time.
Illustratively, the thickness of the first low reflection layer 30 may be 1nm, 10nm, 20nm, 30nm, 40nm, 50nm, 60nm, 70nm, 80nm, 90nm, 100nm, 110nm, 120nm, 130nm, 140nm, 150nm, 160nm, 170nm, 180nm, 190nm, 200nm, 210nm, 220nm, 230nm, 240nm, 250nm, 300nm, 400nm, 500nm, 600nm, 700nm, 800nm, 900nm, 1000nm, 1500nm, 2000nm, 2500nm, 3000nm, and the like.
Preferably, the thickness of the first low reflection layer 30 is between 20nm and 250 nm. Within the range of 20nm to 250nm, the first low reflection layer 30 can be ensured to have good low reflectivity, and the manufacturing cost of the LED display screen is easy to control.
Specifically, the material of the first low reflection layer 30 includes at least one of a metal, an alloy, a metal compound, and a metal oxide. Wherein, the metal includes but is not limited to nickel, titanium, chromium, copper, iron. The alloy can be an alloy of at least two metals of nickel, titanium, chromium, copper and iron. The metal compound can be obtained by combining any two metals of nickel, titanium, chromium, copper and iron. The metal oxide can be obtained by reacting any one of nickel, titanium, chromium, copper and iron with an oxide.
It can be understood that the first low reflection layer 30 prepared by at least one of metal, alloy, metal compound and metal oxide has conductivity, so that the conductivity of the bead circuit 20a of the LED display screen, such as power supply uniformity and conductivity, can be improved by the aid of the first low reflection layer 30, and further the working stability of the LED display screen can be improved. Meanwhile, the conductive layer 20 also comprises metal-related materials, so that the first low reflection layer 30 containing metal materials is prepared, and the stability of combination of the first low reflection layer 30 and the conductive layer 20 is improved, so that the service life of the LED display screen is prolonged. In addition, the first low reflection layer 30 made of the above materials is also advantageous to achieve a dark color treatment of the first low reflection layer 30, that is, to reduce the reflectance of the first low reflection layer 30.
As shown in fig. 6, in an embodiment, the flexible transparent LED display screen of the present application further includes an adhesive layer 60, the adhesive layer 60 is disposed on the flexible transparent substrate 10, and the conductive layer 20 is adhered to the flexible transparent substrate 10 through the adhesive layer 60, wherein the adhesion isThe adhesion of the layer 60 to the flexible transparent substrate 10 is not less than 0.5kg/cm2。
Specifically, the adhesive force refers to the adhesive strength between the adhesive layer 60 and the flexible transparent substrate 10, and may be understood as the adhesiveness between the adhesive layer 60 and the flexible transparent substrate 10. In general, the greater the adhesion force, the stronger the adhesion between the adhesive layer 60 and the flexible transparent substrate 10, and the more stable the adhesion between the adhesive layer 60 and the flexible transparent substrate 10.
It can be understood that, since the flexible transparent substrate 10 is made of glass or organic polymer and the conductive layer 20 is made of metal, the two are not made of the same type of material, and the conductive layer 20 is directly disposed on the flexible transparent substrate 10, the bonding stability between the conductive layer 20 and the flexible transparent substrate 10 is not good. In order to solve this problem, the flexible transparent LED display screen of the present application is advantageous to increase the stability of the adhesion of the conductive layer 20 on the flexible transparent substrate 10 by providing the adhesive layer 60 on the flexible transparent substrate 10 to adhere the flexible transparent substrate 10 and the conductive layer 20. Further, the adhesion force with the flexible transparent substrate 10 by the restriction of the adhesion layer 60 is not less than 0.5kg/cm2The stability of the adhesion of the adhesive layer 60 on the flexible transparent substrate 10 can be ensured.
Specifically, the material of the adhesion layer 60 includes at least one of a metal, an alloy, a metal compound, a metal oxide, and a transparent polymer substance. The metal includes, but is not limited to, nickel, titanium, chromium, copper, and iron. The alloy can be an alloy of at least two metals of nickel, titanium, chromium, copper and iron. The metal compound can be obtained by combining any two metals of nickel, titanium, chromium, copper and iron. The metal oxide can be obtained by reacting any one of nickel, titanium, chromium, copper and iron with an oxide. The transparent polymer can be at least one of non-volatile acrylic resin, non-volatile epoxy-acrylic resin, and their modified substances.
In one embodiment, when the material of the adhesion layer 60 includes at least one of a metal, an alloy, a metal compound and a metal oxide, the thickness of the adhesion layer 60 is between 1nm and 3000 nm. Among these, if the thickness of the adhesive layer 60 is too thin, for example, less than 1nm, the adhesive ability of the adhesive layer 60 is reduced, and it is difficult to secure the adhesive strength between the flexible transparent substrate 10 and the conductive layer 20, while the manufacturing process of the adhesive layer 60 is complicated, which is disadvantageous in cost control. If the thickness of the adhesive layer 60 is too thick, for example, greater than 3000nm, the thickness of the LED display screen may be increased, which may affect the transparency of the LED display screen. And will result in increased cost of the LED display screen. Therefore, the thickness of the bonding layer 60 is limited to 1 nm-3000 nm, and the bonding capability of the bonding layer 60 and the production cost of the LED display screen can be considered at the same time.
Illustratively, the adhesive layer 60 may have a thickness of 1nm, 10nm, 20nm, 30nm, 40nm, 50nm, 60nm, 70nm, 80nm, 90nm, 100nm, 110nm, 120nm, 130nm, 140nm, 150nm, 160nm, 170nm, 180nm, 190nm, 200nm, 210nm, 220nm, 230nm, 240nm, 250nm, 300nm, 400nm, 500nm, 600nm, 700nm, 800nm, 900nm, 1000nm, 1500nm, 2000nm, 2500nm, 3000nm, and the like.
Preferably, the thickness of the adhesive layer 60 is between 20nm and 250 nm. Within the range of 20nm to 250nm, the good adhesion of the adhesive layer 60 can be ensured, and the production cost of the LED display screen can be effectively controlled.
In one embodiment, when the material of the adhesive layer 60 is a transparent polymer, the thickness of the adhesive layer 60 is between 1um and 100 um. When the organic layer is made of a transparent organic polymer material, a transparent organic coating may be first formed and then coated on the flexible transparent substrate 10. Since the coating method has certain limitations and the transparency of the transparent organic polymer material is good, the thickness of the adhesive layer 60 made of the transparent organic polymer material can be between 1um and 100 um. If the thickness of the adhesive layer 60 is less than 1um, the adhesive performance is not favorably exerted, and if the thickness of the adhesive layer 60 is greater than non-100 um, the thickness and the cost of the LED display screen are affected by the excessive thickness of the adhesive layer 60, so that the adhesive capacity of the adhesive layer 60 and the production cost of the LED display screen can be considered at the same time by limiting the thickness of the adhesive layer 60 to 1 um-100 um.
Illustratively, the thickness of the adhesive layer 60 can be 1um, 2um, 3um, 4um, 5um, 6um, 7um, 8um, 9um, 10um, 15um, 20um, 25um, 30um, 40um, 50um, 60um, 70um, 80um, 90um, 100um, etc.
Preferably, the thickness of the adhesive layer 60 is between 5um and 30 um. Within the range of 5um to 30um, the bonding layer 60 can be ensured to have good bonding property, and the production cost of the LED display screen can be effectively controlled.
As shown in fig. 7, in an embodiment, the flexible transparent LED display further includes a second low reflection layer 70, the second low reflection layer 70 is disposed between the adhesive layer 60 and the conductive layer 20, and the reflectivity of the second low reflection layer 70 is not greater than 35%.
Specifically, the material and the manufacturing method of the second low reflection layer 70 can refer to the first low reflection layer 30, and are not described herein again. It can be understood that the second reflective layer is disposed between the adhesive layer 60 and the conductive layer 20, so that the reflectivity of the adhesive layer 60 can be effectively reduced, and the transparency of the LED display screen can be improved.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (10)
1. A flexible transparent LED display screen, comprising:
a flexible transparent substrate;
the conductive layer is arranged on one side or two sides of the flexible transparent substrate and is used for forming lamp bead circuits, and at least part of the lamp bead circuits are arranged in a grid shape;
a first low reflection layer disposed on the conductive layer, the first low reflection layer having a reflectivity of less than 35%;
the welding layer is arranged on the first low-reflection layer or the conducting layer and is used for forming a welding disc of the lamp bead circuit; and
and the LED lamp bead is welded on the welding layer.
2. The flexible transparent LED display of claim 1, wherein the first low reflective layer has a thickness of 1nm to 3000 nm.
3. The flexible transparent LED display of claim 2, wherein the first low reflective layer has a thickness of 20nm to 250 nm.
4. The flexible transparent LED display screen of any one of claims 1 to 3, wherein the lamp bead circuit further comprises an adhesive layer, the adhesive layer is disposed on a flexible transparent substrate, the conductive layer is adhered to the flexible transparent substrate through the adhesive layer, and the adhesion force between the adhesive layer and the flexible transparent substrate is not less than 0.5kg/cm2。
5. The flexible transparent LED display of claim 4, wherein the adhesive layer has a thickness of 1nm to 3000 nm.
6. The flexible transparent LED display of claim 5, wherein the adhesive layer has a thickness of 20nm to 250 nm.
7. The flexible transparent LED display of claim 4, wherein the bead circuitry further comprises a second low-reflection layer disposed on the adhesive layer, the second low-reflection layer having a reflectivity of no greater than 35%.
8. The flexible transparent LED display of claim 1, wherein the conductive layer has a thickness of 0.1um to 300 um.
9. The flexible transparent LED display of claim 8, wherein the conductive layer has a thickness of 0.5um to 50 um.
10. The flexible transparent LED display screen of claim 1, wherein when the conductive layers are disposed on both sides of the flexible transparent substrate, the projections of the bead lines on both sides of the flexible transparent substrate onto the flexible transparent substrate are overlapped.
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| CN112885254A (en) * | 2021-04-13 | 2021-06-01 | 深圳市蝉翼科技有限公司 | Flexible transparent LED display screen |
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2021
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112885254A (en) * | 2021-04-13 | 2021-06-01 | 深圳市蝉翼科技有限公司 | Flexible transparent LED display screen |
| WO2022218060A1 (en) * | 2021-04-13 | 2022-10-20 | 珠海华萃科技有限公司 | Flexible transparent led display screen |
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