Preparation method and application of a flexible wearable wireless data glove
By using liquid metal and dispensing printing technology on a flexible substrate to fabricate wireless data gloves, the problems of bulkiness and low production efficiency of wireless data gloves have been solved, achieving a lightweight and comfortable wearing experience and efficient production.
Patent Information
- Application Number
- CN202510009089.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-03
- Publication Date
- 2025-11-28
- Estimated Expiration
- 2045-01-03
AI Technical Summary
Existing wireless data gloves are bulky and unsuitable for prolonged wear. The choice of materials restricts hand movement, resulting in low production efficiency and requiring multi-manufacturer collaboration for assembly.
Wireless data gloves were fabricated on flexible substrates using liquid metal and dispensing printing technology. The fluidity of the liquid metal was used to directly connect sensors, and conductive circuits were formed by pulsed light sintering. Different resistive inks were used to distinguish sensor types, and the gloves were then encapsulated into flexible gloves.
It improves the fit and production efficiency of gloves, reduces restrictions on hand movements, achieves a lightweight and comfortable wearing experience, and simplifies the production process.
Smart Images
Figure CN119794356B_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application belongs to the field of printed electronics, and particularly relates to a preparation method and application of a flexible wearable wireless data glove. BACKGROUND
[0002] The current wireless data glove is a high-tech wearable device designed for virtual reality (VR), augmented reality (AR) and human-computer interaction fields. It can accurately capture the motion trajectory of the user's hand and fingers through the built-in sensors, and transmit these data to the computer or mobile device in real time, so as to realize the control of objects in the virtual environment. Compared with the traditional wired data glove, the wireless data glove has the advantages of higher portability and comfort, and the user is no longer bound by the cable, and can operate and experience more freely. Wireless data gloves usually use advanced wireless communication technologies such as Bluetooth or Wi-Fi to ensure low-latency and high-stability data transmission. The sensors of the glove include gyroscopes, accelerometers, bending sensors and tactile feedback devices, etc. These elements work together to accurately capture finger bending, stretching, rotation and other subtle movements. In addition, the glove may also be equipped with force feedback function, so that the user can feel the tactile feedback in the virtual environment, further improving the sense of immersion.
[0003] The current wireless data glove still has many problems in design, such as the data glove is relatively heavy, and long-term wearing may cause discomfort. Especially in the scene where the hand needs to be operated finely, the design of the glove needs to be more lightweight and fit. In the selection of materials, the selection of the material of the glove also affects its comfort. The current data glove often uses hard materials, which will limit the movement of the hand. Moreover, in the production process, it needs to be assembled by multiple manufacturers, which greatly reduces the production efficiency. SUMMARY
[0004] In view of the above technical problems, the present application discloses a preparation method of a flexible wearable wireless data glove, which uses the characteristics of liquid metal and point glue printing, combined with a flexible substrate, to greatly improve the hand fit and production efficiency of the data glove.
[0005] One of the purposes of the present application is to provide a preparation method of a flexible wearable wireless data glove, which is carried out according to the following steps:
[0006] S1: ultrasonic mixing of liquid metal and three different concentrations of organic solution of high molecular dispersant, respectively obtaining three different high molecular dispersant content liquid metal ink;
[0007] S2: inject three kinds of liquid metal ink with different polymer dispersant content into the needle tube of the microelectronic printer, print on the flexible substrate, and then perform pulsed light sintering to obtain a bending sensor, a pressure sensor, and a circuit for connecting the sensors and modules;
[0008] S3: package with flexible material after assembly to obtain a flexible wearable wireless data glove.
[0009] Further limited, the liquid metal in S1 is gallium-based liquid metal.
[0010] Further limited, the gallium-based liquid metal is gallium, gallium-indium alloy or gallium-indium-tin alloy.
[0011] Further limited, the polymer dispersant in S1 is polyvinylpyrrolidone (PVP), and the solvent of the organic solution is ethanol. The selection of the solvent requires that it has the characteristics of fast evaporation, because if the evaporation speed is too slow, it will affect the heat input effect of light. Through experiments, ethanol is selected as the most suitable solvent.
[0012] Further limited, the concentration of the three different concentrations of polymer dispersant in S1 is between 1-25wt.%, and the concentration difference is 5-15wt.%.
[0013] Further limited, the flexible substrate in S2 is PDMS or Ecoflex.
[0014] Further limited, the printing parameters in S2: the dispensing height is 0.25-2mm. The dispensing speed and dispensing air pressure are selected according to the storage time of the liquid metal ink. As the storage time increases, the viscosity of the ink increases, which directly affects the printing difficulty. Through experiments, the dispensing speed range is 5-20mm / s, and the dispensing air pressure range is 15-120kPa.
[0015] Further limited, the voltage of the pulsed light sintering in S2 is 400-480V, and the energy density is 4.5-6.5J / cm 2 .
[0016] The second purpose of the present application is to provide a flexible wearable wireless data glove prepared by the above method.
[0017] The third purpose of the present application is to provide an application of the above method in the preparation of a flexible wireless data acquisition and transmission device.
[0018] The fourth purpose of the present application is to provide an application of the flexible wearable wireless data glove prepared by the above method in the field of virtual reality (VR), augmented reality (AR) and human-computer interaction.
[0019] Compared with the prior art, the present application has the following remarkable effects:
[0020] This invention uses dispensing printing of liquid metal ink to create circuit and flexible device patterns on a flexible substrate, integrally molding the flexible data transmission part of a data glove. Thermal stress is applied to the circuit patterns and flexible devices using pulsed light sintering, causing conductive lines to be sintered between the liquid metal ink particles. This design uses low-resistance liquid metal ink for printing the data transmission circuit of the data glove. Two other inks with different resistances are used as the glove's bending and pressure sensors. The purpose of using two inks with different resistances is to differentiate sensor types by acquiring basic resistance in the data collection and processing module. Then, based on the principle of resistive sensors, the resistance change rate is calculated, and the data is fitted to the actual situation to obtain the desired data or to simulate actions in VR. Due to the fluidity of liquid metal, electrical connections for surface-mount chips can be directly completed without soldering. After further encapsulation, the data glove is directly obtained. Attached Figure Description
[0021] Figure 1 This is a flowchart of the preparation process of the liquid metal ink of the present invention; wherein 1-PVP, 2-centrifuge tube, 3-liquid metal, 4-vibrating rod of ultrasonic disruptor, 5-coolant, 6-microelectronic printer needle;
[0022] Figure 2 This is a schematic diagram of the structure of the wireless data glove of the present invention;
[0023] Figure 3 This is a process flow diagram for manufacturing the wireless data glove of the present invention;
[0024] Figure 4 SEM images of liquid metal inks with different PVP contents before sintering in Example 1; where (a)-5wt.%, (b)-10wt.%, (c)-15wt.%.
[0025] Figure 5 The dispensing pressure in Example 1 was 18 kPa, and the effect of different dispensing speeds on line width was investigated.
[0026] Figure 6 To and Figure 5 The corresponding line widths are shown in the photos; (a)-6mm / s, (b)-7mm / s, (c)-8mm / s, (d)-9mm / s, (e)-10mm / s, (f)-11mm / s, (g)-12mm / s, (h)-13mm / s, (i)-14mm / s.
[0027] Figure 7 The effect of different dispensing air pressures on line width was investigated in Example 1, where the dispensing speed was 12 mm / s.
[0028] Figure 8For example, the liquid metal ink of the present application can be used to form a conductive trace on a substrate, such as a printed circuit board (PCB). The liquid metal ink can be applied to the substrate using any suitable method, such as screen printing, inkjet printing, or dispensing. The liquid metal ink can then be cured, or solidified, by applying heat to the substrate. The heat can be applied using any suitable method, such as a hot plate, an oven, or a laser. The heat can be applied at a temperature and for a time sufficient to cure the liquid metal ink. The temperature and time can be selected based on the specific composition of the liquid metal ink and the desired properties of the conductive trace. Once the liquid metal ink has been cured, the conductive trace can be used in any suitable application, such as a circuit, a sensor, or an antenna. Figure 7 Corresponding line width actual photos; wherein (a) -15.5 kPa, (b) -16 kPa, (c) -16.5 kPa, (d) -17 kPa, (e) -17.5 kPa, (f) -18 kPa, (g) -18.5 kPa, (h) -19 kPa, (i) -19.5 kPa;
[0029] Figure 9 For example, the liquid metal ink of the present application can be used to form a conductive trace on a substrate, such as a printed circuit board (PCB). The liquid metal ink can be applied to the substrate using any suitable method, such as screen printing, inkjet printing, or dispensing. The liquid metal ink can then be cured, or solidified, by applying heat to the substrate. The heat can be applied using any suitable method, such as a hot plate, an oven, or a laser. The heat can be applied at a temperature and for a time sufficient to cure the liquid metal ink. The temperature and time can be selected based on the specific composition of the liquid metal ink and the desired properties of the conductive trace. Once the liquid metal ink has been cured, the conductive trace can be used in any suitable application, such as a circuit, a sensor, or an antenna.
[0030] Figure 10 For example, the liquid metal ink of the present application can be used to form a conductive trace on a substrate, such as a printed circuit board (PCB). The liquid metal ink can be applied to the substrate using any suitable method, such as screen printing, inkjet printing, or dispensing. The liquid metal ink can then be cured, or solidified, by applying heat to the substrate. The heat can be applied using any suitable method, such as a hot plate, an oven, or a laser. The heat can be applied at a temperature and for a time sufficient to cure the liquid metal ink. The temperature and time can be selected based on the specific composition of the liquid metal ink and the desired properties of the conductive trace. Once the liquid metal ink has been cured, the conductive trace can be used in any suitable application, such as a circuit, a sensor, or an antenna. DETAILED DESCRIPTION
[0031] For the purposes of the present application, the term "comprising" means including, but not limited to, whatever follows the word "comprising". Generally "comprising" will be understood to encompass the terms "including" and "consisting of".
[0032] The experimental methods used in the following examples are conventional unless otherwise specified. The materials, reagents, methods and instruments used are conventional in the art unless otherwise specified, and are available to those skilled in the art through commercial channels.
[0033] The terms "comprising", "including", "containing", "having" or any other similar
[0034] The terms "one embodiment" or "an embodiment" as may appear in the present description are to be interpreted to mean that a particular feature, structure, or characteristic described is included in at least one embodiment of the present application. The appearances of the phrases "in one embodiment" or "in an embodiment" in various places in the specification are not necessarily all referring to the same embodiment, nor are they necessarily all directed to a single feature, structure, or characteristic of an embodiment.
[0035] The endpoints of the ranges and any values disclosed in the application are not limited to the precise values recited as the exact dimensions are not critical to the present application. Any numerical value, however, can contain certain errors associated with testing measurements inherent in the art of testing. Ranges can be expressed as from one of these non- critical values and / or to another of these non-critical values. These ranges are only another way of expressing the limiting values as the endpoints of the range.
[0036] Example 1:Figures 1-3 The preparation method of the flexible wearable wireless data glove of the present embodiment is carried out in the following steps:
[0037] (1) Combination Figure 1 The liquid metal ink was prepared as follows: first, 0.86 mL of EGaIn alloy was added to three 5 mL centrifuge tubes respectively, and then 2 mL of polyvinylpyrrolidone (PVP) ethanol solution with a concentration of 5 wt.%, 10 wt.% and 15 wt.% was added to the centrifuge tubes respectively. Then, the mixture was ultrasonically treated using an ultrasonic disrupter, the vibration rod of the ultrasonic disrupter was inserted into the mixture, the ultrasonic power was set to 360 W, the ultrasonic time was 2 minutes, and the ultrasonic duration was 2 seconds with 2 seconds of interval, to obtain the liquid metal ink. From Figure 4 It can be seen that, with the increase of the PVP concentration, although its effect on the ink coating and dispersion is similar, the distance between the particles is not much different, but its insulation will cause the increase of the base resistance after sintering.
[0038] (2) Combination Figures 2-3 The liquid metal ink with a PVP content of 5 wt.% was injected into the needle tube of the microelectronic printer, and the required circuit pattern was printed on the PDMS flexible substrate, the ink storage time was 20 min, the dispensing height was 0.4 mm, the dispensing speed was 12 mm / s, and the dispensing air pressure was 18 kPa. The liquid metal ink with a PVP content of 10 wt.% was injected into the needle tube of the microelectronic printer, and the required pressure sensor was printed on the PDMS flexible substrate, the ink storage time was 30 min, the dispensing height was 0.4 mm, the dispensing speed was 11 mm / s, and the dispensing air pressure was 20 kPa. The liquid metal ink with a PVP content of 15 wt.% was injected into the needle tube of the microelectronic printer, and the required bending sensor was printed on the PDMS flexible substrate, the ink storage time was 40 min, the dispensing height was 0.4 mm, the dispensing speed was 10 mm / s, and the dispensing air pressure was 22 kPa. As shown in Figures 5-8 , by adjusting the dispensing parameters, different patch chip sizes can be adapted.
[0039] (3) Place the substrate loaded with the circuit and the sensor on the worktable, and perform pulsed light sintering. The light sintering was performed on the three positions (circuit, bending sensor, pressure sensor) through the light shield, and the sintering voltages were 465 V, 460 V and 450 V respectively, and the sintering conditions were as shown in Figure 9As shown, the conductive circuit and flexible sensor device are obtained. Then, a patch data processing module and a power supply module are attached at the preset pads. Finally, a PDMS encapsulation layer is spin-coated on the substrate of the load circuit, the spin-coating speed is 200 r / min, the time is 1 min, the spin-coated PDMS thickness is 0.5 mm, and after spin-coating, the PDMS is dried in a vacuum drying box at 80°C for 3 h, and the flexible wearable wireless data glove is obtained after drying.
[0040] From Figure 9 It can be seen that after pulse light sintering processing, the liquid metal particles complete sintering, and sintering neck morphology is generated.
[0041] From Figure 10 It can be seen that when treating inks with different PVP concentrations under the same sintering power, there are differences in the resistance of the obtained circuit and device. Therefore, the synergistic effect of the light sintering power and the PVP concentration can be used to realize the preparation of low-resistance circuits and different-resistance sensors.
[0042] Example 2: in combination Figures 1-3 The preparation method of the flexible wearable wireless data glove of the present embodiment is carried out in the following steps:
[0043] (1) in combination Figure 1 , liquid metal ink is prepared: first, 0.86 mL of EGaIn alloy is added to three 5 mL centrifuge tubes respectively, then 2 mL of polyvinylpyrrolidone (PVP) ethanol solution with a concentration of 2 wt.% / 7.5 wt.% / 20 wt.% is added to the centrifuge tubes respectively. Then, the mixture is ultrasonically treated using an ultrasonic disruptor, the ultrasonic disruptor vibration rod is inserted into the mixed solution, the ultrasonic power is set to 360 W, the ultrasonic time is 2 minutes, the ultrasonic duration is 2 seconds and the interval is 2 seconds, and the liquid metal ink is obtained.
[0044] (2) in combination Figures 2-3 , the liquid metal ink with a PVP content of 2 wt.% is injected into the needle tube of the microelectronic printer, and the required circuit pattern is printed on the PDMS flexible substrate, the ink storage time is 10 min, the dispensing height is 0.4 mm, the dispensing speed is 14 mm / s, and the dispensing air pressure is 16 kPa. The liquid metal ink with a PVP content of 7.5 wt.% is injected into the needle tube of the microelectronic printer, and the required pressure sensor is printed on the PDMS flexible substrate, the ink storage time is 20 min, the dispensing height is 0.4 mm, the dispensing speed is 12 mm / s, and the dispensing air pressure is 18 kPa. The liquid metal ink with a PVP content of 20 wt.% is injected into the needle tube of the microelectronic printer, and the required bending sensor is printed on the PDMS flexible substrate, the ink storage time is 30 min, the dispensing height is 0.4 mm, the dispensing speed is 10 mm / s, and the dispensing air pressure is 21 kPa.
[0045] (3) Place the substrate of the load circuit and sensor on the loading platform, and perform pulse light sintering. The three positions (circuit, bending sensor, and pressure sensor) are sintered by light shielding respectively, and the sintering voltages are 470V, 455V, and 450V respectively, to obtain the conductive circuit and flexible sensor device. Then, a data processing module and a power supply module are attached at the preset pads. Finally, a PDMS encapsulation layer is spin-coated on the substrate of the load circuit, the spin-coating speed is 200r / min, the time is 1min, the spin-coating thickness of the PDMS is 0.5mm, and after spin-coating, the PDMS is dried in a vacuum drying box at 80℃ for 3h, and the flexible wearable wireless data glove is obtained after drying.
[0046] The above merely illustrates the preferred embodiments of the present application, which are different implementations based on the overall concept of the present application, and the protection scope of the present application is not limited thereto. Any person skilled in the art can easily think of changes or replacements within the technical range disclosed by the present application, which should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.
Claims
1. A method for preparing a flexible wearable wireless data glove, characterized in that, The method described: S1: Liquid metal and organic solutions of three different concentrations of polymeric dispersants were ultrasonically mixed to obtain three liquid metal inks with different polymeric dispersant contents; the polymeric dispersant was PVP, the solvent was ethanol, and the concentrations of the organic solutions of the three different concentrations of polymeric dispersants were between 1-25 wt.%, with a concentration difference of 5-15 wt.%. S2: Liquid metal inks with three different contents of polymer dispersant are injected into the needle of a microelectronic printer and printed on a flexible substrate. Then, pulsed light sintering is performed to obtain a bending sensor, a pressure sensor, and circuits for connecting each sensor and module. Printing parameters: dispensing height 0.25-2mm, dispensing speed 5-20mm / s, dispensing air pressure 15-120kPa, pulsed light sintering voltage 400-480V, energy density 4.5-6.5J / cm³. 2 ; S3: After assembly, flexible materials are used for encapsulation to obtain a flexible wearable wireless data glove.
2. The method according to claim 1, characterized in that, The liquid metal in S1 is a gallium-based liquid metal.
3. The method according to claim 2, characterized in that, Gallium-based liquid metals are gallium, gallium-indium alloys, or gallium-indium-tin alloys.
4. The method according to claim 1, characterized in that, The flexible substrate in S2 is PDMS or Ecoflex.
5. The flexible wearable wireless data glove made by the method of any one of claims 1-4.
6. The application of the flexible wearable wireless data glove as described in claim 5 in the fields of VR, AR and human-computer interaction.
Citation Information
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Automobile intelligent cabin steering wheel hand-leaving detection device adopting flexible force sensor
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Preparation method of liquid metal microparticle ink conductive circuit
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