Electronic fabric with display function and preparation method thereof

Abstract

The invention discloses an electronic fabric with a display function, which comprises warps and wefts, the warps comprise electroluminescent active fibers, and inner electrodes of at least two electroluminescent active fibers are respectively connected with two electrodes of an external power supply; the wefts comprise textile yarns; and the polar medium is coated on a woven surface formed by the warps and the wefts, extends between the at least two electroluminescent active fibers and is used for electrically connecting the at least two electroluminescent active fibers. By the adoption of the technical scheme, the electronic fabric with the display function can be obtained, due to the fact that conductive fibers do not need to be connected, electrode connection becomes relatively simple, meanwhile, control of a drive circuit is not needed, the application range of the electronic fabric is widened, the problem that light emitting is affected by poor contact is solved, and under the condition that the conductive fibers do not exist, the display effect is good. And the service life is further prolonged. The invention also discloses a preparation method of the electronic fabric.

Description

Technical Field

[0001] The invention relates to the field of light-emitting devices, and in particular to an electronic fabric with display function and a preparation method thereof. Background Art

[0002] Wearable devices, as a new generation of electronic devices, have received extensive attention from the scientific and industrial communities. Display devices, as the core components of human-computer interaction, are an important development direction for the future technological revolution. However, traditional flat-panel display devices cannot adapt to physical deformations such as bending, friction, and stretching that occur in people's daily lives. Wearable electronic display fabrics provide broad development prospects for the digitization of human visual information.

[0003] At present, there are three main ways to construct electronic display fabrics: the first is to attach a flexible planar device with display function to the surface of the fabric (CN202310536800.4); the second is to sew fibrous electroluminescent active devices and conductive fibers on the surface of the fabric in a vertically intersecting form, and the vertical intersections form pixels. After the voltage is turned on, the intersections emit light, and multiple intersections form a light-emitting array (Cho et al., Sci. Adv. 10, eadk4295 (2024), doi: 10.1126 / sciadv.adk4295); the third is to use electroluminescent active fibers as warp threads and conductive fibers as weft threads, and form warp and weft interlacing points, i.e., light-emitting pixels, by weaving. The light-emitting pixel array is controlled by a driving circuit to produce a certain display pattern (CN202110071716.0; CN202310048457.9).

[0004] However, for the first method, flexible planar devices such as organic light-emitting diodes, polymer light-emitting electrochemical cells, electroluminescent films and other devices are not tightly bonded to the fabric surface, and cracks are easily generated in the functional layers, resulting in high difficulty in device preparation and limited service life; and the display pattern prepared by the second method of sewing is fixed. This is because the electroluminescent fibers and conductive fibers can only be sewn from one end to the other, and the formed cross units are at least lit in the same row or column at the same time, and a single interlaced unit cannot be controlled, which is a "pseudo pixel point". This method of displaying a fixed pattern and unable to change in real time will be greatly limited in practical applications.

[0005] The third type of display fabric constructed by flat weaving electroluminescent fibers and transparent conductive fibers has a relatively long service life and can form "pixels". A single interlaced unit can be controlled by independent control of the pixels. It has dynamic and flexible display functions and has a wider range of application scenarios than the first and second types. However, for the third type of display fabric, the control of the pixels needs to be realized through the driving circuit, which increases the complexity of the structure and the control is also more complicated. In particular, if each pixel is to be controlled, each electroluminescent fiber and transparent conductive fiber must be connected to the power supply. With the current technical level, the design of the driving circuit will be very complicated and the integration is low. A larger and more clumsy block driving circuit board is required, which inevitably limits the scope of application. At the same time, when there is poor contact between the electroluminescent fiber and the transparent conductive fiber, it will affect the luminescence and image formation. Moreover, further, although it is theoretically possible to obtain any pattern by controlling the pixels, in fact, the writing and implementation of the program are very complicated and difficult to carry out actual operations. Summary of the invention

[0006] In order to solve the above technical problems, the embodiment of the present invention discloses an electronic fabric with display function, comprising:

[0007] The warp includes electroluminescent active fibers, each of which includes an inner electrode, a luminescent layer and a protective layer arranged in sequence from the inside to the outside, and the inner electrodes of at least two electroluminescent active fibers are respectively connected to two electrodes of an external power source;

[0008] Weft, including textile yarn;

[0009] The polar medium is coated on the woven surface formed by the warp and weft threads and extends between at least two electroluminescent active fibers to electrically connect the at least two electroluminescent active fibers.

[0010] By adopting the above technical scheme, electronic fabrics with display functions can be obtained through weaving warp and weft threads, connecting electrodes, and coating dielectrics. At the same time, no driving circuit control is required, and various patterns can be easily realized, thereby expanding the application scope of electronic fabrics.

[0011] Optionally, the warp threads further include textile yarns, and there is at least one textile yarn between two adjacent electroluminescent active fibers.

[0012] Optionally, the warp threads are the textile yarns and the electroluminescent active fibers arranged alternately, there is one textile yarn between two adjacent electroluminescent active fibers, the warp density of the electronic fabric is 4-20 threads / cm, and the inner electrodes of adjacent electroluminescent active fibers are respectively connected to the two electrodes of the external power supply.

[0013] Optionally, the weft yarn is a textile yarn, and the weft density of the electronic fabric is 5-30 yarns / cm.

[0014] Optionally, the polar medium is a polar solution, and the components of the polar solution include one or more of water, ethanol, acetone, an inorganic salt solution and glycerol.

[0015] Optionally, the polar solution further comprises a surfactant, which is one or more of sodium dodecylbenzene sulfonate, isoprene hydroxyphenyl ether, hydroxyethyl phenethyl ether and polyethanol ether. In the polar solution, the content of the surfactant is 0.05wt%-1wt% by mass.

[0016] Optionally, the polar medium is a polar hydrogel, the components of the polar hydrogel include a hydrogel material, and the hydrogel material is one or more of polyacrylamide, agar and polyacrylic acid.

[0017] Optionally, the polar hydrogel further comprises a photocuring agent, and the photocuring agent is one or more of N,N'-methylenebisacrylamide, 2-hydroxy-4'-(2-hydroxyethoxy)-2-methylpropiophenone, and ammonium dichromate.

[0018] Optionally, the content of the hydrogel material in the polar hydrogel is 1wt%-20wt% by mass.

[0019] According to another specific embodiment of the present invention, an embodiment of the present invention discloses a method for preparing an electronic textile, comprising the following steps:

[0020] Weaving: Weaving with warp and weft to obtain primary electronic fabrics;

[0021] Connecting to power supply: Connect the primary electronic fabric to an external power supply;

[0022] Coating: Coating polar medium on primary electronic fabric to obtain electronic fabric.

[0023] By adopting the above technical solution, electronic fabrics with display functions can be obtained through weaving warp and weft threads, connecting electrodes, and coating dielectrics, and various patterns can be easily realized, thereby expanding the application scope of electronic fabrics.

[0024] Optionally, the polar medium is a polar solution, and in the coating step, the polar solution is used to write or draw on the primary electronic textile to obtain the electronic textile.

[0025] Optionally, the polar medium is a polar hydrogel, and the coating step further includes a polar hydrogel preparation step, in which a hydrogel material is mixed with a photocuring agent and deionized water to obtain the polar hydrogel.

[0026] Optionally, in the coating step, the polar hydrogel is scraped onto the primary electronic fabric, a mask is placed on the polar hydrogel, and ultraviolet light curing is performed to obtain the electronic fabric. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 A schematic diagram of the structure of an electronic textile according to an embodiment of the present invention is shown;

[0028] Figure 2 A physical diagram of an electronic textile according to an embodiment of the present invention is shown;

[0029] Figure 3A A schematic diagram showing writing with a polar solution in Example 1 of the present invention is shown;

[0030] Figure 3B A physical picture of the electronic fabric according to Embodiment 1 of the present invention is shown;

[0031] Figure 4A A schematic diagram showing the polar solution painting in Example 2 of the present invention;

[0032] Figure 4B The electronic fabric of the second embodiment of the present invention is shown Figure 1 ;

[0033] Figure 4C The electronic fabric of the second embodiment of the present invention is shown Figure 2 ;

[0034] Figure 5A The electronic fabric of the third embodiment of the present invention is shown Figure 1 ;

[0035] Figure 5B The electronic fabric of the third embodiment of the present invention is shown Figure 2 ;

[0036] Figure 5C Figure 3 shows the electronic textile of Embodiment 3 of the present invention;

[0037] Figure 5D Figure 4 shows the electronic textile of Embodiment 3 of the present invention;

[0038] Figure 6 A graph showing the friction resistance test data of the electronic fabric of Example 1 of the present invention;

[0039] Figure 7The figure shows the water washability test data of the electronic fabric of Example 2 of the present invention. DETAILED DESCRIPTION

[0040] The following specific embodiments illustrate the implementation of the present invention, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. Although the description of the present invention will be introduced in conjunction with the preferred embodiment, this does not mean that the features of this invention are limited to this implementation. On the contrary, the purpose of introducing the invention in conjunction with the implementation is to cover other options or modifications that may extend based on the claims of the present invention. In order to provide a deep understanding of the present invention, the following description will include many specific details. The present invention can also be implemented without using these details. In addition, in order to avoid confusion or blurring the focus of the present invention, some specific details will be omitted in the description. It should be noted that the embodiments of the present invention and the features in the embodiments can be combined with each other without conflict.

[0041] It should be noted that in this specification, similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings.

[0042] In order to make the objectives, technical solutions and advantages of the present invention more clear, the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings.

[0043] The first aspect of the present invention discloses an electronic fabric with display function, referring to Figure 1 , the electronic fabric includes warp and weft. Specifically, the electronic fabric is woven or spun by warp and weft, and the warp and weft can be interwoven. Among them, the warp includes electroluminescent active fibers 1, each electroluminescent active fiber 1 includes an inner electrode, a luminescent layer and a protective layer arranged in sequence from the inside to the outside, and the inner electrodes of at least two electroluminescent active fibers 1 are respectively connected to two electrodes of an external power supply. The weft includes textile yarn 2.

[0044] Electronic fabrics also include polar media ( Figure 1(not shown in the figure), which is coated on the fabric surface S formed by the warp and weft, and extends between at least two electroluminescent active fibers 1, and is used to electrically connect at least two electroluminescent active fibers 1. In the current electronic fabrics with display function, the electroluminescent active fibers and the transparent conductive fibers are the warp and weft, respectively. The inner electrodes of the electroluminescent active fibers and the transparent conductive fibers (equivalent to the outer electrodes) are respectively connected to the power supply to form a loop. At the overlap of the electroluminescent active fibers and the conductive fibers, the luminescent material can emit light in the electric field. In the technical solution of the present invention, the inner electrodes of at least two electroluminescent active fibers are respectively connected to the two electrodes of the power supply, and a polar medium is coated on the surface of the fabric so that the polar medium contacts and connects at least two electroluminescent active fibers, that is, the polar medium is used to make it a "bridge". At the place where the polar medium is coated, an electric field is generated between the electroluminescent active fibers, and the luminescent material in the electroluminescent active fibers emits light under the action of the electric field. Specifically, the external power supply is an AC power supply.

[0045] In a specific embodiment of the present invention, the electronic textile is specifically composed of warp threads, weft threads and a polar medium.

[0046] In a specific embodiment of the present invention, more specifically, the weft is a textile yarn, that is, the weft uses only textile yarn, the weft does not include transparent conductive fibers, and there is no need to use transparent conductive fibers to overlap with the luminescent active fibers.

[0047] Since the transparent conductive fiber is eliminated and only the electroluminescent active fiber needs to be connected to the power supply, the complexity of the circuit is reduced. In addition, light can be emitted by coating the polar medium without the need for additional control by the driving circuit, and the overall structural complexity is further reduced. As a wearable product, it can be more portable and more suitable for daily use, further broadening the use scenario. Such a setting will not cause the problem of affecting light emission due to inadequate overlap and poor contact. At the same time, since the transparent conductive fiber has a limited life and is susceptible to short circuit or open circuit caused by weaving or external friction damage, after the transparent conductive fiber is eliminated, the overall service life of the electronic fabric is further improved, and the eliminated transparent conductive fiber can be replaced by textile yarn, so the flexibility of the fabric can be further improved and more suitable for wear. In addition, the present application is connected in a way that the power supply and the inner electrode are connected, and the inner electrode is not easily damaged, which further improves the service life. The electronic fabric of the present invention not only retains the softness and comfort of the fabric, but also has a functional display effect, meeting the needs of practical use.

[0048] Furthermore, the warp includes a plurality of electroluminescent active fibers, and the inner electrodes of each electroluminescent active fiber are respectively connected to the power supply electrodes. By coating a polar medium, any pattern can be actually realized, and the operation is simple. At this time, there is no need to control the pattern through a bulky driving module, which is conducive to actual wear and expands the convenience and applicability of electronic fabrics. Furthermore, the electronic fabrics of the present invention can be further associated with intelligent scenes, such as brain wave control, to achieve more intelligent human-computer interaction applications. Moreover, compared to overlapping to form pixel points for pattern control, the electronic fabrics of the present invention are no longer limited to only the overlapping parts that can emit light, but the entire electroluminescent active fiber can be used for emitting light, which improves the consistency and display quality of the image display, and is particularly conducive to the formation of some more complex patterns.

[0049] In a specific embodiment of the present invention, the inner electrode of the electroluminescent active fiber is selected from one or more of metal-coated nanoparticle chemical fiber, metal enameled wire, and metal bare wire. Specifically, the diameter of the inner electrode is 20 μm-500 μm, and the conductivity is 10 -5 S / cm-10 5 S / cm, which is beneficial to improve the electroluminescent efficiency and luminous effect. Preferably, the diameter of the inner electrode is 50μm-200μm, and the conductivity is 10 -3 S / cm-10 -1 S / cm, which is beneficial to improve the resolution of displayed fabrics, ensure good conductivity within a certain fabric density range, and obtain a balance between material flexibility and conductivity.

[0050] In a specific embodiment of the present invention, the light-emitting layer surrounds the inner electrode. During the preparation, the light-emitting layer slurry is coated on the surface of the inner electrode to obtain the light-emitting layer. The components of the light-emitting layer slurry include electroluminescent materials, solvents, adhesives, wetting agents, and surfactants. The electroluminescent material is more specifically an inorganic electroluminescent material selected from metal sulfide electroluminescent materials, including CaS, SrS, ZnS, CaGa 2 S 4 , SrGa 2 S 4 One of them. Furthermore, the particle size of the electroluminescent material is 50nm-50μm, and, by mass percentage, the proportion of the electroluminescent material in the light-emitting layer slurry is 20wt%-90wt%, and the luminous efficiency and stability of the light-emitting layer can be guaranteed. Preferably, the particle size of the electroluminescent material is 10-30μm, and the proportion of the electroluminescent material in the light-emitting layer slurry is 40wt%-60wt%, providing good luminous performance and uniform luminous effect, and also ensuring that the material has a suitable viscosity, so that the coating performance is better.

[0051] In the luminescent layer slurry, the solvent is one or more of acetone, N,N dimethylformamide, ethyl acetate, and N-methylpyrrolidone, and the proportion of the solvent in the luminescent layer slurry is 5wt%-50wt%, which is beneficial to the dispersion of the electroluminescent material and the preparation effect of the luminescent layer. Preferably, the proportion of the solvent in the luminescent layer slurry is 15wt%-30wt%, so that the slurry is easy to coat, the material is not easy to agglomerate, the uniformity is good, and it is more conducive to the handling and processing of the slurry.

[0052] In the luminescent layer slurry, the binder can be a solvent type, selected from one or more of polyvinyl alcohol, polyurethane, vinyl acetate, acrylic adhesive, epoxy water-based adhesive, phenolic water-based adhesive, and silicone water-based adhesive. The binder accounts for 5wt%-50wt% in the luminescent layer slurry. Preferably, the binder accounts for 15wt%-30wt% in the luminescent layer slurry, which is more suitable for the slurry system of the luminescent layer of the present invention.

[0053] In the luminescent layer slurry, the wetting agent and the surfactant are commonly used in the art.

[0054] In a specific embodiment of the present invention, the protective layer of the electroluminescent active fiber is a transparent insulating encapsulation layer located on its outermost layer, which can prevent the electroluminescent active fiber from being broken down. Specifically, the protective layer is a solvent-based solid transparent resin, which is dip-coated on the surface of the light-emitting layer and is selected from epoxy resin, acrylate resin, polyurethane resin, polyvinylidene fluoride resin, and silicone resin. More specifically, the weight average molecular weight of the resin is 50,000-200,000, and the thickness of the resin is 5μm-50μm. Preferably, the thickness of the resin is 10μm-20μm, which is beneficial to the visual effect of the electronic textile, and can fully play a protective role and improve the reliability of the electronic textile.

[0055] In a specific embodiment of the present invention, the electronic fabric can be obtained by various weaving methods, such as weaving and plain weaving. Preferably, the electronic fabric is obtained by plain weaving, which has a higher luminous density and a more coherent image.

[0056] In a specific embodiment of the present invention, Figure 1 As shown, the warp also includes textile yarns 2, and there is at least one textile yarn 2 between two adjacent electroluminescent active fibers 1. Through this arrangement, the wearability can be further improved.

[0057] In a specific embodiment of the present invention, the warp is a textile yarn and an electroluminescent active fiber arranged alternately, a textile yarn is between two adjacent electroluminescent active fibers, the warp density of the electronic fabric is 4-20 yarns / cm, and, with reference to Figure 1, the inner electrodes of adjacent electroluminescent active fibers are respectively connected to the electrodes of the external power supply. At this time, the luminous performance and wearability of the electronic textile are satisfied at the same time, the air permeability, softness and comfort are good, the structural stability and strength are guaranteed, and various patterns can be flexibly realized. At the same time, the inner electrodes of adjacent electroluminescent active fibers are respectively connected to the electrodes of the external power supply, which can improve the uniformity of the electric field, improve the luminous quality of the entire electronic textile, and the visual effect of the image display is better. Preferably, the warp density of the electronic textile is 6-8 strands / cm, and both the image display and wearability are satisfied.

[0058] In a specific embodiment of the present invention, the weft is a textile yarn, and the weft density of the electronic fabric is 5-30 yarns / cm, and the air permeability, softness and comfort are further improved. Preferably, the weft density is 8-12 yarns / cm.

[0059] In the embodiment of the present invention, the warp is a textile yarn and the electroluminescent active fiber is arranged alternately, there is a textile yarn between two adjacent electroluminescent active fibers, the weft is a textile yarn, and under the control of the warp density and the weft density, Figure 2 As shown, polar media can be used to achieve better luminous performance and are easy to wear.

[0060] In a specific embodiment of the present invention, the polar medium is a polar solution, and the components of the polar solution include one or more of water, ethanol, acetone, inorganic salt solution and glycerol, which can ensure visual requirements, meet the requirements of electrical connection, and facilitate the processing of electronic textiles. For example, the polar solution can be applied to the surface of the electronic textile by writing and painting. Preferably, an organic polar solution can be selected, and the protective layer formed by such a polar solution and the resin has better interface performance.

[0061] In a specific embodiment of the present invention, the polar medium is a polar hydrogel, and the components of the polar hydrogel include a hydrogel material, and the hydrogel material is one or more of polyacrylamide, agar and polyacrylic acid. Such a hydrogel material can ensure visual requirements, meet the requirements of electrical connection, and facilitate the processing of electronic fabrics. For example, the polar hydrogel can be applied to the surface of the electronic fabric by scraping or mask covering.

[0062] In particular, since the polar solution and the polar hydrogel have different survival times on the fabric surface, for example, the polar solution may dissipate relatively quickly, so it can be used in some occasions that require short-term luminescence, and after the polar solution dissipates, it can be rewritten or painted and reused, or the polar solution can be dried. The polar hydrogel has a longer survival time and is suitable for some occasions that require long-term luminescence. If different patterns are required, it can be dried to obtain other patterns again.

[0063] In a specific embodiment of the present invention, the polar solution also includes a surfactant, so that the contact and wettability of the polar solution with the fabric are improved, and the displayed pattern is clearer. The surfactant is one or more of sodium dodecylbenzene sulfonate, isoprene hydroxyphenyl ether, hydroxyethyl phenyl ether and polyethanol ether. In the polar solution, the content of the surfactant is 0.05wt%-1wt% by mass percentage. Preferably, the content of the surfactant is 0.1wt%-0.5wt%, which is convenient for the reuse of the electronic fabric.

[0064] In a specific embodiment of the present invention, when a hydrogel material that needs to be photocured is used, the components of the polar hydrogel also include a photocuring agent, and the photocuring agent is one or more of N,N'-methylenebisacrylamide, 2-hydroxy-4'-(2-hydroxyethoxy)-2-methylpropiophenone, and ammonium dichromate.

[0065] In a specific embodiment of the present invention, the content of the hydrogel material in the polar hydrogel is 1wt%-20wt%, and the content of the photocuring agent is 0.1wt%-3wt%, which ensures that the hydrogel has sufficient strength and stability while maintaining good flexibility and light transmittance. Preferably, the content of the hydrogel material is 5wt%-10wt%, and the content of the photocuring agent is 0.5wt%-2wt%, which is more convenient for curing of the hydrogel, and the electronic fabric has a better luminous effect and better durability.

[0066] The electronic fabric of the present invention can not only realize flexible pattern design and good luminous performance without additional control, but also has 100-500cd / m 2 Adjustable brightness, and service life of up to 3000h, the fabric can be repeatedly washed and dried, and remains stable after 30 industrial washing tests. The fabric has excellent flexibility and breathability, and remains stable after 100,000 friction tests.

[0067] The second aspect of the present invention discloses a method for preparing an electronic textile, comprising the following steps:

[0068] Weaving: Weaving with warp and weft to obtain primary electronic fabrics;

[0069] Connecting to power supply: Connect the primary electronic fabric to an external power supply;

[0070] Coating: Coating polar medium on primary electronic fabric to obtain electronic fabric.

[0071] There is no specific limitation on the order of the steps of coating and connecting the power supply, and the coating may be performed first and then the power supply may be connected, or the power supply may be connected first and then the coating may be performed.

[0072] In a specific embodiment of the present invention, the polar medium is a polar solution, and the coating step includes a polar solution preparation step, in which a surfactant is mixed with one or more of water, ethanol, acetone, an inorganic salt solution and glycerol. In the coating step, the polar solution is used to write or draw on the primary electronic fabric to obtain the electronic fabric.

[0073] In a specific embodiment of the present invention, the polar medium is a polar hydrogel, and the coating step includes a polar hydrogel preparation step. In the polar hydrogel preparation step, the hydrogel material is mixed with a photocuring agent and deionized water to obtain the polar hydrogel.

[0074] In a specific embodiment of the present invention, in the coating step, the polar hydrogel is scraped onto the primary electronic fabric, and then a mask is placed on the polar hydrogel, and UV curing is performed to obtain the electronic fabric. In a specific embodiment of the present invention, the thickness of the scraped hydrogel is 100 μm-2 cm, preferably, the thickness is 200 μm-1 cm. The mask material is metal, including but not limited to stainless steel, molybdenum, copper, and iron, and the mask thickness is 20 μm-500 μm, preferably, the thickness is 100 μm-300 μm. Specifically, the UV curing time is 5s-60s.

[0075] In an embodiment of the present invention, before the weaving step, an electroluminescent active fiber preparation step is also included, including preparing a luminescent layer and a protective layer outside the inner electrode. Specifically, a luminescent layer slurry is coated on the outside of the inner electrode, and operations such as drying are performed, and then a protective layer raw material is coated and operations such as drying are performed.

[0076] The following will be described in conjunction with more specific embodiments. Examples 1-3 are electronic fabrics of the present invention.

[0077] Embodiment 1:

[0078] The preparation method of Example 1 is:

[0079] Preparation of electroluminescent active fiber: At room temperature 25°C, add 25g of copper-doped commercial zinc sulfide powder (diameter 15μm) to 40g of ethanol solvent, then add 22.5g of polyvinyl alcohol adhesive, 0.4g of sodium dodecylbenzene sulfonate surfactant and other additives, magnetically stir for 60min, and the stirring speed is 400rpm to obtain a uniformly dispersed luminescent layer slurry. Turn on the dip coating device, and evenly coat the luminescent layer slurry on the surface of silver-plated nylon fiber (diameter 40D) at a speed of 12m / min, then dry it online at 120°C, and finally collect and wind it on a bobbin. Turn on the encapsulation device, and evenly coat the 50wt% aqueous polyurethane solution on the fiber surface at a speed of 8m / min, then dry it online at 120°C, and finally collect and wind it on a bobbin to obtain encapsulated electroluminescent active fiber, and the thickness of the encapsulation layer is controlled to be about 20μm.

[0080] Weaving: Turn on the rapier weaving machine, use the electroluminescent active fiber and 30D cotton thread as the warp, and use the 30D cotton thread as the weft to weave, adjacent electroluminescent active fibers are separated by cotton thread, and the warp and weft density is 60×100 (indicating that the warp density is 60 strands per ten centimeters and the weft density is 100 strands per ten centimeters, that is, the warp density is 6 strands / cm and the weft density is 10 strands / cm), to obtain primary electronic fabrics.

[0081] Preparation of polar solution: At room temperature (25°C), add 0.1 g of sodium dodecylbenzene sulfonate to 10 g of deionized water and stir magnetically for 10 min to obtain a uniformly dispersed polar solution.

[0082] Connecting the power supply: connecting the electroluminescent active fibers spaced apart in the prepared primary electronic textile to the same electrode, and connecting the adjacent electroluminescent active fibers to the opposite electrode, and applying a square AC voltage of 100V with a frequency of 2 kHz between the two electrodes.

[0083] Coating: As Figure 3A As shown, writing with polar medium water on the primary electronic fabric can obtain Figure 3B The electronic fabric with customized display pattern shown has a luminous intensity of 100cd / m 2 The electronic fabric can withstand 100,000 frictions (such as Figure 6 As shown, Figure 6 The horizontal axis represents the number of cycles. Figure 6 The vertical axis represents the ratio of each test brightness to the initial brightness) and it still works stably after that.

[0084] Embodiment 2:

[0085] The preparation method of Example 2 is:

[0086] Preparation of electroluminescent active fiber: At room temperature 25°C, add 25g of copper-doped commercial zinc sulfide powder (diameter 15μm) to 40g of ethanol solvent, then add 22.5g of polyvinyl alcohol adhesive, 0.4g of sodium dodecylbenzene sulfonate surfactant and other additives, magnetically stir for 60min, and the stirring speed is 400rpm to obtain a uniformly dispersed luminescent layer slurry. Turn on the dip coating device, and evenly coat the luminescent layer slurry on the surface of silver-plated nylon fiber (diameter 40D) at a speed of 12m / min, then dry it online at 120°C, and finally collect and wind it on a bobbin. Turn on the encapsulation device, and evenly coat the 50wt% aqueous polyurethane solution on the fiber surface at a speed of 8m / min, then dry it online at 120°C, and finally collect and wind it on a bobbin to obtain encapsulated electroluminescent active fiber, and the thickness of the encapsulation layer is controlled to be about 20μm.

[0087] Weaving: Turn on the rapier weaving machine, use the electroluminescent active fiber and 30D cotton thread as the warp, and use the 30D cotton thread as the weft to weave. Adjacent electroluminescent active fibers are separated by cotton thread. The warp and weft density is 40×80 to obtain primary electronic fabrics.

[0088] Connecting the power supply: connecting the electroluminescent active fibers spaced apart in the prepared primary electronic textile to the same electrode, and connecting the adjacent electroluminescent active fibers to the opposite electrode, and applying a square AC voltage of 200V with a frequency of 2 kHz between the two electrodes.

[0089] Coating: As Figure 4A As shown, by using glycerol as a polar medium to paint on primary electronic fabrics, electronic fabrics with customized display patterns can be obtained (such as Figure 4B and Figure 4C As shown), reaching 240cd / m 2 The electronic fabric still works stably after 30 washes (such as Figure 7 As shown, Figure 7 The horizontal axis represents the number of cycles. Figure 7 The ordinate represents the ratio of each tested brightness to the initial brightness), and can be reused by washing and drying.

[0090] Embodiment 3:

[0091] The preparation method of Example 3 is:

[0092] Preparation of electroluminescent active fiber: At room temperature 25°C, add 25g of copper-doped commercial zinc sulfide powder (diameter 15μm) to 40g of ethanol solvent, then add 22.5g of polyvinyl alcohol adhesive, 0.4g of sodium dodecylbenzene sulfonate surfactant and other additives, magnetically stir for 60min, and the stirring speed is 400rpm to obtain a uniformly dispersed luminescent layer slurry. Turn on the dip coating device, and evenly coat the luminescent layer slurry on the surface of silver-plated nylon fiber (diameter 40D) at a speed of 12m / min, then dry it online at 120°C, and finally collect and wind it on a bobbin. Turn on the encapsulation device, and evenly coat the 50wt% aqueous polyurethane solution on the fiber surface at a speed of 8m / min, then dry it online at 120°C, and finally collect and wind it on a bobbin to obtain encapsulated electroluminescent active fiber, and the thickness of the encapsulation layer is controlled to be about 20μm.

[0093] Weaving: Turn on the rapier weaving machine, use the electroluminescent active fiber and 30D cotton thread as the warp, and use the 30D cotton thread as the weft to weave, adjacent electroluminescent active fibers are separated by cotton thread, the warp and weft density is 60×100, and primary electronic fabrics are obtained.

[0094] Preparation of polar hydrogel: At room temperature 25°C, 10 g of polyacrylamide was added to 190 g of deionized water, and 0.3 g of 2-hydroxy-4'-(2-hydroxyethoxy)-2-methylpropiophenone was added, and magnetic stirring was performed for 60 min to obtain a uniformly dispersed polar hydrogel medium.

[0095] Coating: A polar hydrogel medium was coated on the primary electronic fabric by doctor blade coating, a customized mask was placed on top of the hydrogel, UV-cured for 1 min, and the uncured part was washed off.

[0096] Connect the power supply: connect the alternate electroluminescent active fibers in the primary electronic fabric to the same electrode, and connect the adjacent electroluminescent active fibers to the opposite electrode. Apply a square AC voltage of 2 kHz and 500V between the two electrodes to realize the customized pattern display function (such as Figure 5A-5D As shown), reaching 500cd / m 2 The luminous intensity of the electronic fabric can reach 3000h.

[0097] Although the present invention has been illustrated and described with reference to certain preferred embodiments of the present invention, it should be understood by those skilled in the art that the above is a further detailed description of the present invention in conjunction with specific embodiments, and it cannot be determined that the specific implementation of the present invention is limited to these descriptions. Those skilled in the art may make various changes in form and details, including making several simple deductions or substitutions, without departing from the spirit and scope of the present invention.

Claims

1. An electronic fabric with display function, characterized in that: include: The warp includes electroluminescent active fibers, each of which includes an inner electrode, a luminescent layer and a protective layer arranged in sequence from the inside to the outside, and the inner electrodes of at least two of the electroluminescent active fibers are respectively connected to two electrodes of an external power source; Weft, including textile yarn; The polar medium is coated on the woven surface formed by the warp and the weft and extends between the at least two electroluminescent active fibers to electrically connect the at least two electroluminescent active fibers.

2. The electronic textile according to claim 1, characterized in that: The warp also includes textile yarns, and at least one textile yarn is located between two adjacent electroluminescent active fibers.

3. The electronic textile according to claim 2, characterized in that: The warp threads are the textile yarns and the electroluminescent active fibers arranged alternately, one textile yarn is located between two adjacent electroluminescent active fibers, the warp density of the electronic fabric is 4-20 yarns / cm, and the inner electrodes of adjacent electroluminescent active fibers are respectively connected to the two electrodes of the external power supply.

4. The electronic textile according to claim 1, characterized in that: The weft yarn is a textile yarn, and the weft density of the electronic fabric is 5-30 yarns / cm.

5. The electronic textile according to claim 1, characterized in that: The polar medium is a polar solution, and the components of the polar solution include one or more of water, ethanol, acetone, inorganic salt solution and glycerol.

6. The electronic textile according to claim 5, characterized in that: The polar solution also includes a surfactant, which is one or more of sodium dodecylbenzene sulfonate, isoprene hydroxyphenyl ether, hydroxyethyl phenethyl ether and polyethanol ether. In the polar solution, the content of the surfactant is 0.05wt%-1wt% by mass.

7. The electronic textile according to claim 1, characterized in that: The polar medium is a polar hydrogel, and the components of the polar hydrogel include hydrogel materials, and the hydrogel material is one or more of polyacrylamide, agar and polyacrylic acid.

8. The electronic textile according to claim 7, characterized in that: The polar hydrogel also includes a photocuring agent, which is one or more of N,N'-methylenebisacrylamide, 2-hydroxy-4'-(2-hydroxyethoxy)-2-methylpropiophenone, and ammonium dichromate.

9. The electronic textile according to claim 7, characterized in that: Calculated by mass percentage, the content of the hydrogel material in the polar hydrogel is 1wt%-20wt%.

10. A method for preparing an electronic textile as claimed in any one of claims 1 to 9, characterized in that: The steps include: Weaving: Weaving with warp and weft to obtain primary electronic fabrics; Connecting a power source: connecting the primary electronic textile to an external power source; Coating: coating a polar medium on the primary electronic textile to obtain the electronic textile.

11. The method for preparing the electronic textile according to claim 10, characterized in that: The polar medium is a polar solution, and in the coating step, the polar solution is used to write or draw on the primary electronic textile to obtain the electronic textile.

12. The method for preparing the electronic textile according to claim 10, characterized in that: The polar medium is a polar hydrogel. Before the coating step, a polar hydrogel preparation step is also included. In the polar hydrogel preparation step, a hydrogel material is mixed with a photocuring agent and deionized water to obtain the polar hydrogel.

13. The method for preparing the electronic textile according to claim 12, characterized in that: In the coating step, the polar hydrogel is scraped onto the primary electronic fabric, a mask is placed on the polar hydrogel, and ultraviolet light curing is performed to obtain the electronic fabric.

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