Watch strap and method for preparing the same

Abstract

The present application provides a watchband and a method for manufacturing the watchband. The watchband is designed to be worn on an electronic device and includes a watchband body, a solar cell unit, and ECG electrodes. The solar cell unit includes a substrate and multiple solar cell modules, each of which is mounted on and electrically connected to the substrate. The ECG electrodes extend through the solar cell unit and are electrically connected to the substrate. The watchband provided in the present application provides power to the electronic device while also adding an ECG detection function, thereby increasing the electronic device's standby time and further expanding new functions.

Description

Technical Field

[0001] The present application relates to the technical field of electronic products, and in particular to a watch strap and a method for preparing the watch strap. Background Art

[0002] Wearable devices are becoming increasingly popular. With the continuous advancement of technology, wristbands, watches, and other wearable devices are becoming more multifunctional, dense, and intelligent. However, with the diversification of functions, the standby time requirements for wearable devices are becoming increasingly stringent.

[0003] In related technologies, the standby time of wearable devices can be increased by increasing the battery capacity. This can be achieved by increasing the thickness of the watch dial to accommodate the battery, or by increasing the size of the dial to increase the battery area, thereby increasing the battery capacity.

[0004] This makes the watch thicker, which is not conducive to miniaturization. Summary of the Invention

[0005] The embodiments of the present application provide a watch strap and a method for preparing the watch strap, which can provide power to an electronic device without affecting the thickness of the electronic device.

[0006] In a first aspect, embodiments of the present application provide a watch strap for holding or wearing an electronic device, the watch strap comprising a watch strap body and a solar cell unit, the solar cell unit comprising a substrate and a plurality of solar cell modules, each solar cell module being mounted on the substrate and electrically connected to the substrate;

[0007] A mounting groove is provided on the strap body, a substrate is provided in the mounting groove, each solar cell module is at least partially located in the mounting groove, and each solar cell module supplies power to the electronic device through the substrate. The accessories of the electronic device of the present application include a strap body and a solar cell unit provided on the strap body, the solar cell unit and the battery on the electronic device jointly supply power to the electronic device, or the solar cell module supplies power to the battery in the electronic device. Thus, the thickness of the electronic device is avoided from being affected, and the standby time of the electronic device is improved. Moreover, each solar cell module in the solar cell unit is firmly integrated on the substrate by mounting, and the connection is more reliable. In addition, the substrate is provided in the mounting groove of the strap body, and each solar cell module is at least partially located in the mounting groove of the strap body. Thus, the solar cell unit is avoided from occupying more space on the thickness of the strap body, thereby affecting the normal use of the strap body.

[0008] In one possible implementation, the accessories of the electronic device provided in the embodiment of the present application, the solar cell unit also includes a light-transmitting encapsulation layer, each solar cell module is encapsulated on the substrate through the light-transmitting encapsulation layer, and the solar cell module is located in the light-transmitting encapsulation layer. In this way, the solar cell module can be protected by the light-transmitting encapsulation layer without affecting the solar cell module's reception of light energy, so as to prevent impurities in the air from corroding the solar cell module and causing a decrease in electrical performance. The life of the solar cell module is improved, and the solar cell unit can have sufficient mechanical strength to withstand collisions, vibrations or other external forces that occur during transportation, installation and use.

[0009] In one possible implementation, in the watch strap provided in the embodiment of the present application, the light-transmitting packaging layer is a transparent epoxy resin layer, an EVA plastic layer, or a POE plastic layer.

[0010] In one possible implementation, in the watchband provided by the embodiment of the present application, each solar cell module and the light-transmitting encapsulation layer are located within the mounting groove. Thus, the mounting groove can protect each solar cell module and the light-transmitting encapsulation layer from being bumped or scratched.

[0011] In one possible implementation, the watchband provided by the embodiment of the present application has the solar cell modules evenly spaced apart on the substrate. This way, the arrangement of the solar cell modules is relatively regular, facilitating automatic mounting of the solar cell modules.

[0012] In one possible implementation, the watchband provided in an embodiment of the present application includes a solar cell unit further comprising a light-transmitting protective layer covering a surface of the light-transmitting encapsulation layer facing away from the substrate. The light-transmitting protective layer protects the light-transmitting encapsulation layer.

[0013] In one possible implementation, in the watch strap provided in an embodiment of the present application, the solar cell unit further includes a light-transmitting protective layer, and the light-transmitting protective layer covers each solar cell module.

[0014] In one possible implementation, the watchband provided in the embodiment of the present application has the mounting slot integrally formed with the watchband body, which makes processing more convenient and saves time.

[0015] In one possible implementation, the watchband provided in an embodiment of the present application has a mounting groove having an inner side surface and a groove bottom surface, and at least one of the groove bottom surface and at least a portion of the inner side surface is roughened. This allows the solar cell to be more firmly bonded within the mounting groove.

[0016] In one possible implementation, the watchband provided in an embodiment of the present application further includes a reflective layer disposed on the inner side surface. The reflective layer and the bottom surface of the groove together form a dissolving and accommodating cavity, and the substrate, the light-transmitting encapsulation layer, and the light-transmitting protective layer are connected to the accommodating cavity. By providing the reflective layer, the present application reflects incoming light onto the solar cell module, thereby increasing the amount of light entering the solar cell module.

[0017] In one possible implementation, the watch strap provided in an embodiment of the present application has a reflective layer including a transparent substrate and a reflective portion provided on the transparent substrate, wherein the reflective portion faces the inner side and is bonded to the inner side.

[0018] In one possible implementation, the watchband provided in the embodiment of the present application has one of the inner side and the reflective layer as an inclined surface, so that the size of the mounting slot opening is smaller than the size of the slot bottom. This allows the reflective layer to be inclined to improve the light reflection effect.

[0019] In one possible implementation, the end of the reflective layer facing away from the bottom of the groove is flush with the light-transmitting protective layer. This allows for a smooth transition between the solar cell and the watchband, resulting in a more aesthetically pleasing appearance.

[0020] In one possible implementation, the watchband provided in an embodiment of the present application further includes an ECG electrode, the ECG electrode covering a surface of the light-transmitting encapsulation layer facing away from the substrate, the ECG electrode being at least partially located outside the mounting groove, and the ECG electrode being electrically connected to the substrate;

[0021] The ECG electrode is provided with a plurality of first through holes, and the first through holes are arranged in a one-to-one correspondence with the solar cell modules.

[0022] In one possible implementation, the watchband provided in an embodiment of the present application further includes a plurality of electrical connection posts, at least one of which is disposed between adjacent solar cell modules. The electrical connection posts are located within the light-transmitting encapsulation layer, and the ECG electrodes are electrically connected to the substrate via the electrical connection posts. The ECG electrodes are used to receive pressure from a user's finger and collect electrical signals from the user's finger to form an ECG signal. The ECG signal is used to obtain the user's electrocardiogram waveform to determine whether the heart's activity is normal, slow, fast, or irregular.

[0023] In one possible implementation, the watchband provided in an embodiment of the present application further includes an ECG electrode, the ECG electrode being covered on a surface of the light-transmitting protective layer facing away from the light-transmitting encapsulation layer, and the ECG electrode being electrically connected to the substrate;

[0024] The ECG electrode is provided with a plurality of first through holes, and the first through holes are arranged in a one-to-one correspondence with the solar cell modules.

[0025] In one possible implementation, the watchband provided in an embodiment of the present application further includes a plurality of electrical connection posts, a plurality of second through holes are provided in the light-transmitting protective layer, the second through holes are arranged in a one-to-one correspondence with the electrical connection posts, and at least one electrical connection post is provided between adjacent solar cell modules;

[0026] The electrical connection column is located in the transparent packaging layer, one end of the electrical connection column is electrically connected to the substrate, and the other end of the electrical connection column is electrically connected to the ECG electrode via the second through hole; alternatively, an electrical connector is provided in the second through hole, and the other end of the electrical connection column is electrically connected to the ECG electrode via the electrical connector.

[0027] In one possible implementation, in the watch strap provided in an embodiment of the present application, the ECG electrodes are at least partially exposed from the mounting groove.

[0028] In one possible implementation, the watch strap provided in the embodiment of the present application has an ECG electrode that is a transparent electrode, and the ECG electrode is a nano silver wire thin film electrode, a carbon nanotube coating, a silk screen coating, or an electroplating coating.

[0029] In one possible implementation, the watch strap provided in an embodiment of the present application has a substrate that is a circuit board. The circuit board has at least two electrical connection parts, and the electrical connection parts are used for electrical connection of electronic devices.

[0030] In one possible implementation, the watchband provided in the embodiment of the present application has an accessory body that is a mobile phone case, and the mounting groove is located on the outer surface of the mobile phone case;

[0031] Alternatively, the watchband body is a watchband or a smart bracelet, and the mounting groove is located on the outer surface of the watchband or the smart bracelet, and is close to the display part of the electronic device.

[0032] In one possible implementation, the watch strap provided in the embodiment of the present application is detachably connected to the device body.

[0033] In a second aspect, an embodiment of the present application further provides a method for preparing a watch strap, comprising:

[0034] Mounting multiple solar cell modules on a substrate to form a solar cell unit;

[0035] A mounting groove is provided on the accessory body;

[0036] Install the solar cell unit in the installation groove.

[0037] In one possible implementation, the method for preparing a watchband provided in an embodiment of the present application, after mounting multiple solar cell modules on a substrate, includes:

[0038] The packaging substrate and the solar cell modules mounted on the substrate.

[0039] In one possible implementation, the method for preparing an accessory for an electronic device provided in an embodiment of the present application, after installing a solar cell unit in a mounting groove, includes:

[0040] An ECG electrode layer electrically connected to the substrate is provided on the solar cell. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Figure 1 Schematic diagram of the structure of the electronic device provided in the embodiment of the present application Figure 1 ;

[0042] Figure 2 Schematic diagram of the structure of the electronic device provided in the embodiment of the present application Figure 2 ;

[0043] Figure 3 Schematic diagram of the structure of the electronic device provided in the embodiment of the present application Figure 3 ;

[0044] Figure 4 Schematic diagram of the structure of the electronic device provided in the embodiment of the present application Figure 4 ;

[0045] Figure 5 for Figure 4 Cross-section of the middle AA section Figure 1 ;

[0046] Figure 6 for Figure 5 A top view of

[0047] Figure 7 for Figure 4 Cross-section of the middle AA section Figure 2 ;

[0048] Figure 8 for Figure 4 Cross-section of the middle AA section Figure 3 ;

[0049] Figure 9 for Figure 4 Cross-section of the middle AA section Figure 4 ;

[0050] Figure 10 for Figure 9 Structural diagram of the middle installation slot;

[0051] Figure 11 for Figure 9 Another structural diagram of the middle reflective layer and the mounting groove;

[0052] Figure 12 for Figure 4 Cross-section of the middle AA section Figure 5 ;

[0053] Figure 13 for Figure 12 Schematic diagram of the structure of ECG electrodes;

[0054] Figure 14 for Figure 4 Cross-section of the middle AA section Figure 6 ;

[0055] Figure 15 for Figure 4 Cross-section of the middle AA section Figure 7 ;

[0056] Figure 16 The process of the method for preparing the watch strap provided in the embodiment of the present application Figure 1 ;

[0057] Figure 17 The process of the method for preparing the watch strap provided in the embodiment of the present application Figure 2 ;

[0058] Figures 18a to 18e for Figure 17 The structural diagram corresponding to each step in the

[0059] Figure 19 The process of the method for preparing the watch strap provided in the embodiment of the present application Figure 3 ;

[0060] Figures 20a to 20d for Figure 19 The structural diagram corresponding to each step in the

[0061] Figure 21 The process of the method for preparing the watch strap provided in the embodiment of the present application Figure 4 ;

[0062] Figures 22a to 22d for Figure 21 The structural diagram corresponding to each step in the

[0063] Figure 23 The process of the method for preparing the watch strap provided in the embodiment of the present application Figure 4 ;

[0064] Figures 24a to 24c for Figure 23 The structural diagram corresponding to each step in .

[0065] Description of reference numerals:

[0066] 1-Electronic device; 10-Accessory of electronic device; 20-Display screen; 30-First watch strap; 31-First connecting portion; 32-First outer surface; 40-Second watch strap; 41-Second connecting portion; 42-Second outer surface; 50-Dial;

[0067] 100 - accessory body; 110 - outer surface of the phone case; 120 - mounting slot; 121 - inner side; 122 - bottom of the slot; 123 - receiving cavity;

[0068] 200 - solar cell unit; 210 - substrate; 211 - first green oil layer; 212 - first copper layer; 213 - dielectric layer; 214 - second copper layer; 215 - second green oil layer; 216 - electrical connection; 220 - solar cell module; 221 - single crystal silicon; 222 - silicon nitride; 230 - light-transmitting encapsulation layer; 240 - light-transmitting protective layer; 241 - second through hole; 2411 - electrical connection; 250 - first adhesive layer;

[0069] 300-reflective layer; 310-transparent substrate; 320-reflective portion; 330-second adhesive layer;

[0070] 400 - ECG electrode; 410 - first through hole;

[0071] 500-Electrical connection column. DETAILED DESCRIPTION

[0072] In order to make the technical solutions of the embodiments of the present application clearer, the terms involved in the embodiments of the present application are first explained.

[0073] Surface Mounted Technology (SMT) is a circuit assembly technology that mounts pinless or short-lead surface mount components on the surface of a circuit board or other substrate, and assembles them by soldering through methods such as reflow soldering or dip soldering.

[0074] Reflow soldering refers to the process of connecting one or more electronic components to contact pads using solder paste (a mixture of solder and flux), and then melting the solder through controlled heating to achieve a permanent joint. Soldering can be performed using different heating methods such as reflow ovens, infrared heating lamps or hot air guns.

[0075] "And / or" describes the association relationship of associated objects, indicating that three relationships can exist. For example, a and / or b can mean: a exists alone, a and b exist at the same time, and b exists alone, where a and b can be singular or plural.

[0076] "Plurality" means two or more.

[0077] In addition, in this application, the terms "first," "second," "third," etc. (if any) are used to distinguish similar objects and are not necessarily used to describe a specific order or precedence. It should be understood that the terms used in this manner are interchangeable where appropriate, so that the embodiments of the present application described herein, for example, can be implemented in an order other than those illustrated or described herein.

[0078] Electronic devices such as mobile phones and wearables are becoming increasingly widespread. Wearables are becoming more multifunctional, denser, and smaller, placing higher demands on their standby time. For example, this requires increasing the battery capacity of wearables and reducing the number of recharges required.

[0079] Wearable devices, such as watches, can increase the thickness of the dial to accommodate the battery. This allows thicker batteries to be placed within the dial, increasing the battery capacity by increasing the thickness. Alternatively, the dial's dimensions can be increased, for example, by increasing its diameter, thereby increasing the diameter of the battery compartment within the dial, thereby increasing the area of the battery that can be accommodated within the dial's battery compartment. In other words, a battery with a larger diameter can be placed within the dial. However, these approaches result in thicker watches, making them bulky and inconvenient to wear, and not conducive to miniaturization.

[0080] Due to the limitations of the actual volume of the wearable device (such as the volume of the dial) and the volume of the battery compartment, it is difficult to provide more space for the battery compartment inside the dial, and the volume of the battery cannot be further expanded.

[0081] Based on this, the embodiments of the present application provide an accessory for an electronic device, an electronic device, and a method for preparing an accessory for an electronic device. The accessory for the electronic device includes an accessory body and a solar cell unit provided on the accessory body. The solar cell unit and the battery on the electronic device jointly power the electronic device, or the solar cell module powers the battery in the electronic device. Thus, the thickness of the electronic device is avoided from being affected, and the standby time of the electronic device is improved. Moreover, each solar cell module in the solar cell unit is firmly integrated on the substrate by mounting, and the connection is more reliable. In addition, the substrate is provided in the mounting groove of the accessory body, and each solar cell module is at least partially located in the mounting groove of the accessory body. Thus, the solar cell unit is avoided from occupying more space on the thickness of the accessory body, thereby affecting the normal use of the accessory body.

[0082] The electronic device 1 of the present application is described below with reference to the accompanying drawings and embodiments.

[0083] In this application, the electronic device 1 (eg, the device body) is a wearable device. The wearable device may include, but is not limited to, a wristband or a watch, wherein the watch may be a smart watch and the wristband may be a smart wristband.

[0084] In a possible implementation, the electronic device 1 may be a watch or a bracelet. For example, the electronic device 1 is described as a watch. Figure 1 Shows the structure of a watch in the first state, see Figure 1As shown, in this embodiment, the accessory 10 of the electronic device can be a watch strap or a wristband. The watch strap can include a first watch strap 30 and a second watch strap 40. The watch can include a dial 50. The first watch strap 30 and the second watch strap 40 are detachably connected to opposite sides of the dial 50. The first watch strap 30 is provided with a first connecting portion 31, and the second watch strap 40 is provided with a second connecting portion 41 that cooperates with the first connecting portion 31. The first connecting portion 31 on the first watch strap 30 is connected to the second connecting portion 41 on the second watch strap 40 to enable the watch to be worn. In other words, the first watch strap 30 and the second watch strap 40 can be worn by the watch.

[0085] It should be noted that the present application does not limit the manner in which the first strap 30 and the second strap 40 are detachably connected to the dial 50, and the structures of the first connecting portion 31 and the second connecting portion 41, and reference may be made to the relevant art. This embodiment will not be described in detail here.

[0086] Figures 2 to 4 FIG2 shows another second state of the watch, for example, a state where the first connecting portion 31 is connected to the second connecting portion 41. In this embodiment, the accessory body 100 can be the first watch strap 30 and / or the second watch strap 40. In other words, Figure 2 As shown, in some embodiments, the first strap 30 and the second strap 40 are both provided with a solar cell unit 200. Figure 3 As shown, in another embodiment, a solar cell unit 200 is provided on the second strap 40. Figure 4 As shown, in yet another embodiment, a solar cell unit 200 is provided on the first strap 30 .

[0087] In the present application, in order to facilitate the solar cell unit 200 to absorb light energy and avoid being blocked when the watch is worn, the solar cell unit 200 can be arranged on the first outer surface 32 of the first watchband 30 and / or the second outer surface 42 of the second watchband 40. There is no limitation on the specific position of the solar cell unit 200 on the first outer surface 32 and / or the second outer surface 42, as long as it does not affect the wearing of the watch.

[0088] In order to facilitate electrical connection between the solar cell unit 200 and the dial 50, thereby powering the dial 50, the solar cell unit 200 on the first strap 30 and / or the second strap 40 can be arranged close to the dial 50. In this way, the solar cell unit 200 is closer to the dial 50, making it easier for the solar cell unit 200 to electrically connect to the dial 50.

[0089] Next, the structure of the solar cell unit 200 will be described. Figure 5 Shown Figure 4It is understood that the structures of the solar cell unit 200 in the mobile phone case and the watch strap are the same. For ease of description, the structure of the solar cell unit 200 in the watch strap is used as an example for illustration.

[0090] Figure 5 Shown Figure 4 The first type of cross-section is the AA cross-section. Figure 4 and Figure 5 As shown, in the present application, the solar cell unit 200 includes a substrate 210 and a plurality of solar cell modules 220 . Each solar cell module 220 is mounted on the substrate 210 and electrically connected to the substrate 210 .

[0091] The accessory body 100 is provided with a mounting groove 120 , the substrate 210 is disposed in the mounting groove 120 , each solar cell module 220 is at least partially located in the mounting groove 120 , and each solar cell module 220 supplies power to the electronic device 1 through the substrate 210 .

[0092] In this embodiment, the substrate 210 is used to support each solar cell module 220. In addition, the substrate 210 also has a conductive function. Each solar cell module 220 converts absorbed light energy into electrical energy, which is then transmitted to the electronic device 1 through the substrate 210, so that each solar cell module 220 supplies power to the electronic device 1. In this way, the solar cell module 220 and the battery within the electronic device 1 jointly supply power to the electronic device 1, or the solar cell module 220 supplies power to the battery within the electronic device 1. This avoids affecting the thickness of the device body of the electronic device 1 (such as a mobile phone or watch face 50), improves the endurance of the electronic device 1, and in other words, increases the standby time of the electronic device 1, which is conducive to the miniaturization of the electronic device 1.

[0093] Exemplarily, the substrate 210 can be a circuit board, which has high reliability, light weight, and thin thickness. In the embodiments and drawings of the present application, the substrate 210 is described as a double-layer circuit board. Specifically, the substrate 210 may include a first green oil layer 211, a first copper layer 212, a dielectric layer 213, a second copper layer 214, and a second green oil layer 215 stacked in sequence, and a plurality of vias 2131 are provided in the dielectric layer 213, and the first copper layer 212 and the second copper layer 214 are connected through the vias 2131. The substrate 210 can be prepared by a masking method (also known as a tenting process) to achieve patterning of the first copper layer 212 and the second copper layer 214. The substrate 210 prepared by the tenting process has a lower cost, a smoother surface, and better reflectivity.

[0094] In a specific implementation, the substrate 210 has at least two electrical connection portions 216, which are used for electrical connection of electronic devices. The electrical connection portions 216 can be a flexible circuit board (e.g., FPC), a wire, silver paste, or a flexible electrical connection material. The electrical connection portions 216 can serve as extraction electrodes, which can extend to the dial 50. The dial 50 has a dial electrical connection portion. The dial electrical connection portion and the electrical connection portion 216 can be electrically connected by magnetic attraction or snap connection, thereby electrically connecting the solar cell module 220 to the dial 50.

[0095] In this application, there is no limitation on the solar cell module 220, which can be a single crystal silicon, amorphous silicon, or gallium arsenide solar cell. In the embodiments and drawings of this application, the solar cell module 220 is described as a single crystal silicon solar cell.

[0096] Specifically, the solar cell module 220 may include two electrode layers and a single crystal silicon layer located between the two electrode layers. The solar cell module 220 may also include a single crystal silicon 221 and a silicon nitride 222 arranged in a stacked manner. Among them, the silicon nitride 222 reduces light reflection. Both electrodes of the single crystal silicon 221 face the substrate 210 and are electrically connected to the substrate 210. The solar cell module 220 formed by the single crystal silicon 221 and the silicon nitride 222 is thinner, and compared with the solar cell module 220 with two electrode layers, the electrode layer on the top of the single crystal silicon 221 is reduced to prevent it from affecting the absorption of light by the single crystal silicon 221, thereby improving the conversion efficiency of the single crystal silicon 221.

[0097] Each solar cell module 220 is placed on the substrate 210 in sequence and mounted on the substrate 210 by SMT (for example, surface mount technology). Among them, reflow soldering can be used to fix each solar cell module 220 on the substrate 210. In this way, the solar cell module 220 is firmly connected to the substrate 210, and the connection strength between each solar cell module 220 and the substrate 210 is high. Even when wearing a watch for running or other sports, each solar cell module 220 is not easy to fall off. In addition, the use of a mounting method to fix each solar cell module 220 on the substrate 210 shortens the processing time and saves costs. The single crystal silicon 221 is electrically connected to the first copper layer 212 or the second copper layer 214.

[0098] It is understood that the solar cell modules 220 on the substrate 210 can be connected in parallel or in series. In specific implementation, the number of solar cell modules 220 and the electrical connection method between the solar cell modules 220 are selected according to design requirements.

[0099] It should be noted that the present application does not limit the shape of the solar cell module 220 . For example, the solar cell module 220 may be circular or square.

[0100] To prevent the solar cell unit 200 from occupying a large amount of space within the thickness of the accessory body 100, thereby increasing the thickness of the accessory body 100 and thus affecting its usability, in the present application, a mounting groove 120 is provided on the accessory body 100, a substrate 210 is disposed within the mounting groove 120, and each solar cell module 220 is at least partially located within the mounting groove 120.

[0101] The electronic device accessory provided in an embodiment of the present application includes an accessory body 100 and a solar cell unit 200 disposed on the accessory body 100. The accessory body 100 can be a watch strap or a protective case for a mobile phone. By disposing the solar cell unit 200 on the accessory body 100, the solar cell unit 200 is prevented from occupying the space of the watch dial or the mobile phone, thereby affecting the thickness of the watch dial or the mobile phone. The solar cell unit 200 includes a substrate 210 and a plurality of solar cell modules 220. Each solar cell module 220 absorbs light energy and converts the light energy into electrical energy through the substrate 210 to transmit it to the electronic device 1, such as the watch dial or the mobile phone, thereby forming a form in which the solar cell module 220 and the battery in the electronic device 1 jointly power the electronic device 1, or the solar cell module 220 powers the battery in the electronic device 1. As a result, the standby time of the electronic device 1 is increased and the function of the accessory body 100 is expanded. Furthermore, each solar cell module 220 is miniaturized and securely integrated on the substrate 210 through mounting. The substrate 210 is disposed within the mounting groove 120 of the accessory body 100, and each solar cell module 220 is at least partially located within the mounting groove 120 of the accessory body 100. This prevents the solar cell unit 200 from occupying a large amount of space within the thickness of the accessory body 100.

[0102] Figure 6 Shown Figure 5 A top view of the . Figure 5 and Figure 6 As shown, in the electronic device accessory provided by the embodiment of the present application, each solar cell module 220 is evenly spaced and arranged on the substrate 210. In this way, the arrangement of each solar cell module 220 is relatively regular, which facilitates the automatic mounting of each solar cell module 220.

[0103] Figure 7 Shown Figure 4 The second cross-section of the AA section. Figure 4 and Figure 7As shown, in some embodiments, the solar cell unit 200 further includes a light-transmitting encapsulation layer 230, and each solar cell module 220 is encapsulated on the substrate 210 through the light-transmitting encapsulation layer 230, and the solar cell module 220 is located within the light-transmitting encapsulation layer 230. In this way, without affecting the solar cell module 220 receiving light energy, the solar cell module 220 can be protected by the light-transmitting encapsulation layer 230 to prevent impurities in the air from corroding the solar cell module 220 and causing a decrease in electrical performance. The life of the solar cell module 220 is improved, and the solar cell unit 200 can have sufficient mechanical strength to withstand collisions, vibrations, or other external forces that occur during transportation, installation, and use.

[0104] The thickness of the light-transmitting encapsulation layer 230 can be between 300 μm and 1000 μm, that is, the thickness of the light-transmitting encapsulation layer 230 is greater than or equal to 300 μm and less than or equal to 1000 μm. If the thickness of the light-transmitting encapsulation layer 230 is less than 300 μm, it is difficult to encapsulate the solar cell module 220 within the light-transmitting encapsulation layer 230. If the thickness of the light-transmitting encapsulation layer 230 is greater than 1000 μm, the thickness of the solar cell unit 200 is affected, resulting in a thicker solar cell unit 200, which in turn affects the thickness of the accessory body 100.

[0105] In some embodiments, the light-transmitting encapsulation layer 230 is a transparent epoxy resin layer, an EVA plastic layer, or a POE plastic layer. In one embodiment, transparent epoxy resin can be used to encapsulate each solar cell module 220. Transparent epoxy resin can cure at low or room temperature and cures quickly. After curing, it has high bonding strength, good bonding hardness, a certain degree of toughness, and good resistance to moisture, water, oil, and dust. It also has excellent insulation, compression resistance, and bonding strength. In another embodiment, EVA plastic can be used to encapsulate each solar cell module 220. EVA is a copolymer of ethylene and acetic acid. Ethylene vinyl acetate copolymer (EVA) is abbreviated as EVA. EVA with a vinyl acetate content of 20-28% is used in hot-melt adhesives. EVA has excellent toughness, impact resistance, filler compatibility, and heat sealing properties. POE (Polyolefin elastomer) plastic is a thermoplastic elastomer produced by in-situ polymerization of ethylene and octene using a metallocene catalyst. POE plastic combines toughness with good processability and excellent aging resistance.

[0106] Please continue to see Figure 7As shown, in some embodiments, each solar cell module 220 and the light-transmitting encapsulation layer 230 are located in the mounting groove 120. In this way, the mounting groove 120 can protect each solar cell module 220 and the light-transmitting encapsulation layer 230, thereby preventing each solar cell module 220 and the light-transmitting encapsulation layer 230 from being bumped, thereby preventing the solar cell module 220 from being damaged.

[0107] Figure 8 Shown Figure 4 The third cross-section of the AA section. Figure 4 and Figure 8 As shown, in some embodiments, the solar cell unit 200 further includes a light-transmitting protective layer 240, which covers the surface of the light-transmitting encapsulation layer 230 facing away from the substrate 210. The light-transmitting protective layer 240 is made of at least one of a microcrystalline glass layer and tempered glass. The light-transmitting protective layer 240 has a greater hardness than the light-transmitting encapsulation layer 230 and protects the light-transmitting encapsulation layer 230.

[0108] In a specific implementation, the light-transmitting protective layer 240 and the light-transmitting encapsulation layer 230 are bonded using an optically clear adhesive (OCA) or rubber adhesive. This securely connects the light-transmitting protective layer 240 and the light-transmitting encapsulation layer 230 while allowing light to enter the solar cell module 220 without affecting the solar cell module's absorption of light energy. Optically clear adhesive (OCA) is a specialty adhesive used to bond transparent optical components. OCA is colorless and transparent, boasts a light transmittance exceeding 95%, and offers excellent bonding strength.

[0109] In addition, in the present application, the solar cell unit 200 is bonded to the mounting groove 120. That is, the side of the solar cell module 220, the light-transmitting protective layer 240, and the light-transmitting encapsulation layer 230 opposite to the mounting groove 120 are bonded to the mounting groove 120. By bonding the solar cell unit 200 to the mounting groove 120, compared to other connection methods such as screw connection and snap connection, there is no need to set up a dedicated connection part, which saves space. Accordingly, the saved space can be used to increase the size of the solar cell module 220.

[0110] Exemplarily, the solar cell unit 200 and the mounting groove 120 can be bonded together by a first adhesive layer 250. The first adhesive layer 250 can be an RTV silicone layer, a fluororubber adhesive layer, or a thermosetting adhesive layer. In a specific implementation, the solar cell unit 200 and the mounting groove 120 can be bonded together using RTV silicone. RTV silicone (room temperature vulcanized silicone rubber) is a type of room temperature vulcanized silicone rubber. RTV silicone has good adhesion, sealing, insulation, moisture resistance, and shock resistance. The solar cell unit 200 and the mounting groove 120 can also be fixed using fluororubber adhesive or thermosetting adhesive, as long as the adhesive material is a transparent material. This embodiment is not limited here.

[0111] In one embodiment, the surface of the solar cell module 220 facing away from the substrate 210 may be modified by electroplating, electrophoresis, laser engraving, etc., so as to improve the overall aesthetics of the solar cell unit 200 .

[0112] In some embodiments, a light-transmitting protective layer 240 is directly provided on the solar cell module 220 to protect the solar cell module 220. In other words, the light-transmitting encapsulation layer 230 is not provided in this embodiment. Figure 8 In the embodiment, a light-transmitting encapsulation layer 230 is provided between the solar cell module 220 and the light-transmitting protective layer 240 , so as to reduce the thickness of the entire solar cell unit 200 .

[0113] In this application, the mounting groove 120 is integrally formed with the accessory body 100. This facilitates processing and saves time. In practice, the accessory body 100 with the mounting groove 120 can be manufactured by injection molding or flat-plate compression molding. The watchband material includes, but is not limited to, fluororubber, leather, or titanium alloy.

[0114] In order to firmly bond the solar cell unit 200 to the mounting groove 120, in the present application, at least one surface within the mounting groove 120 is a rough surface. Exemplarily, the mounting groove 120 can be in the shape of a rectangular parallelepiped, and the mounting groove 120 has four inner side surfaces 121 and a groove bottom surface 122. The four inner side surfaces 121 are respectively wrapped around the circumference of the groove bottom surface 122, and at least one of the groove bottom surface 122 and the four inner side surfaces 121 is a rough surface. Thus, the solar cell unit 200 can be firmly bonded to the mounting groove 120. The four inner side surfaces 121 and the groove bottom surface 122 can all be rough surfaces, so that the solar cell unit 200 can be more firmly bonded to the mounting groove 120.

[0115] In a specific implementation, the groove 120 can be installed by tool friction or solution etching (eg, allyltriethoxysilane solution) to form a rough surface on the inner side surface 121 and / or the groove bottom surface 122 .

[0116] Figure 9 Shown Figure 4 The fourth cross-section of the AA section. Figure 4 and Figure 9 As shown, the electronic device accessory provided in the embodiment of the present application further includes a reflective layer 300, which is disposed on the inner side surface 121. The reflective layer 300 and the groove bottom surface 122 together form a receiving cavity 123. The substrate 210, the light-transmitting encapsulation layer 230, and the light-transmitting protective layer 240 are connected to the receiving cavity 123. By providing the reflective layer 300, the present application reflects incoming light onto the solar cell module 220, thereby increasing the amount of light entering the solar cell module 220 and improving the utilization rate of sunlight.

[0117] In some embodiments, the reflective layer 300 includes a transparent substrate 310 and a reflective portion 320 disposed on the transparent substrate 310. The reflective portion 320 faces the inner side surface 121 and is bonded to the inner side surface 121. The transparent substrate 310 may be tempered glass or glass-ceramics. The surface of the tempered glass or glass-ceramics is coated with trace amounts of stannous chloride solution, silver nitrate solution, and reducing solution to form, for example, the reflective portion 320 (a silver layer or an aluminum layer).

[0118] The reflective portion 320 and the inner side surface 121 may be bonded together by a second adhesive layer 330 , wherein the second adhesive layer 330 may be a fluororubber adhesive layer.

[0119] One of the inner side surface 121 of the mounting groove 120 or the reflective layer 300 can be configured as an inclined surface. In this way, the reflective layer 300 can be inclined to improve the light reflection effect.

[0120] Figure 10 Shown Figure 9 A mounting slot structure. Figure 9 and Figure 10 As shown, in a possible implementation, the inner side surface 121 of the mounting groove 120 is an inclined surface, so that the size of the groove opening of the mounting groove 120 is smaller than the size of the groove bottom surface 122. In other words, the mounting groove 120 is a groove with a large opening and a small bottom.

[0121] Figure 11 Shown Figure 9 Another structure of the mounting groove and the reflective layer 300. Figure 9 and Figure 11 As shown, in another possible implementation, one of the reflective layers 300 is an inclined surface, so that the size of the slot opening of the mounting slot 120 is smaller than the size of the slot bottom 122. Specifically, the transparent substrate 310 can be configured to have a thickness that gradually decreases from the slot opening of the mounting slot 120 toward the slot bottom 122 of the mounting slot 120.

[0122] The substrate 210 , the light-transmitting encapsulation layer 230 , the light-transmitting protective layer 240 and the receiving cavity 123 are bonded together by a first adhesive layer 250 .

[0123] In some embodiments, the end of the reflective layer 300 away from the groove bottom surface 122 is flush with the light-transmitting protective layer 240. In this way, the solar cell unit 200 can smoothly transition to the watchband, making the solar cell unit 200 more beautiful in appearance.

[0124] The above embodiment integrates a solar cell unit 200 into a watch strap, thereby enabling the watch strap to power the watch dial. In some possible implementations, other functions may also be integrated into the watch strap, such as a touch screen (e.g., TP) or biometric information detection.

[0125] The following describes the biometric information detection function of the watchband in conjunction with the accompanying drawings and embodiments.

[0126] Figure 12 Shown Figure 4 The fifth cross-section of the AA section, Figure 13 shows the structure of ECG electrodes. Figure 4 、 Figure 12 and Figure 13 As shown, based on the above embodiment, the accessory 10 of the electronic device provided in this application further includes an ECG electrode 400 , which covers the surface of the light-transmitting packaging layer 230 facing away from the substrate 210 , and is electrically connected to the substrate 210 .

[0127] The ECG electrode 400 has a plurality of first through holes 410, each corresponding to a solar cell module 220. This allows the solar cell module 220 to be exposed through the first through holes 410, preventing the ECG electrode 400 from blocking the solar cell module 220 and thus affecting the solar cell module 220's absorption of light energy. The ECG electrode 400 and the light-transmitting encapsulation layer 230 can be bonded together using a conductive adhesive.

[0128] Among them, the ECG electrode 400 is used to receive the pressure of the user's finger and collect the electrical signal of the user's finger to form an ECG signal. The user's electrocardiogram waveform is obtained through the ECG signal to determine whether the heart activity is normal, slow, fast or irregular.

[0129] In order to achieve electrical connection between the ECG electrode 400 and the substrate 210, in some embodiments, the accessory 10 of the electronic device further includes a plurality of electrical connection posts 500, at least one electrical connection post 500 is provided between adjacent solar cell modules 220, the electrical connection post 500 is located within the light-transmitting encapsulation layer 230, and the ECG electrode 400 and the substrate 210 are electrically connected via the electrical connection post 500. In other words, the electrical connection post 500 is fixed by the light-transmitting encapsulation layer 230, and the electrical connection post 500 can simultaneously encapsulate the electrical connection post 500 and the solar cell module 220, which is more convenient to operate. The electrical connection post 500 electrically connects the ECG electrode 400 and the substrate 210, thereby transmitting the ECG signal formed on the ECG electrode 400 to the dial.

[0130] Figure 14 Shown Figure 4 The sixth section of the AA section. Figure 4 and Figure 14 As shown, based on the above embodiment, the accessory 10 of the electronic device provided by the present application further includes an ECG electrode 400, which is covered on the surface of the light-transmitting protective layer 240 away from the light-transmitting packaging layer 230, and the ECG electrode 400 is electrically connected to the substrate 210. Figure 12 The ECG electrode 400 has the same structure and function as that in the embodiment, and will not be described in detail here.

[0131] To electrically connect the ECG electrodes 400 to the substrate 210, in this embodiment, the accessory 10 for an electronic device further includes a plurality of electrical connection posts 500. A plurality of second through holes 241 are defined in the light-transmitting protective layer 240. The second through holes 241 correspond to the electrical connection posts 500 in a one-to-one relationship. At least one electrical connection post 500 is provided between adjacent solar cell modules 220. The electrical connection posts 500 may be copper pins.

[0132] In some embodiments, the electrical connection post 500 is located within the light-transmitting encapsulation layer 230. One end of the electrical connection post 500 is electrically connected to the substrate 210, and the other end of the electrical connection post 500 is electrically connected to the ECG electrode 400 via the second through-hole 241. In other words, the electrical connection post 500 passes through the light-transmitting protective layer 240 to electrically connect the ECG electrode 400 and the substrate 210, thereby transmitting the ECG signal generated on the ECG electrode 400 to the dial.

[0133] Figure 15 Shown Figure 4 The seventh section of the AA section. Figure 4 and Figure 15As shown, in another embodiment, an electrical connector 2411 is disposed in the second through hole 241, and the other end of the electrical connection post 500 is electrically connected to the ECG electrode 400 via the electrical connector 2411. In other words, the electrical connection post 500 is located in the light-transmitting encapsulation layer 230, and the electrical connector 2411 on the light-transmitting protective layer 240 is connected to the electrical connection post 500, thereby electrically connecting the ECG electrode 400 and the substrate 210.

[0134] The electrical connector 2411 may be formed by filling the second through hole 241 with a conductor through electroplating or silk-screen plugging.

[0135] In a specific implementation, the area of one of the end of the electrical connector 2411 facing the electrical connection column 500 and the end of the electrical connection column 500 facing the electrical connector 2411 is larger than the area of the other. This facilitates the docking of the electrical connector 2411 and the electrical connection column 500 and avoids misalignment between the two. For example, the drawings of this embodiment show that the area of the end of the electrical connector 2411 facing the electrical connection column 500 is larger than the area of the end of the electrical connection column 500 facing the electrical connector 2411. It is understandable that in some embodiments, the area of the end of the electrical connection column 500 facing the electrical connector 2411 may also be larger than the area of the end of the electrical connector 2411 facing the electrical connection column 500.

[0136] In some embodiments, the ECG electrode 400 is at least partially exposed from the mounting groove 120. In this way, the user's finger can fully contact the ECG electrode 400, the effect of collecting the electrical signal of the user's finger is better, and the detection result is more accurate.

[0137] In the present application, the ECG electrode 400 is a transparent electrode, and the ECG electrode 400 is a nanosilver wire thin film electrode, a carbon nanotube coating, a silk screen coating, or an electroplating coating. The nanosilver wire thin film electrode has low cost and a simple integration process, and can be directly adhered to the light-transmitting protective layer 240 using ACF (anisotropic conductive adhesive). The carbon nanotube coating can etch fine grooves on the light-transmitting protective layer 240, and generate a carbon nanotube network in the grooves through a deposition process, which is scratch-resistant and highly reliable. Silk screen coating and electroplating coating deposit a conductive coating on the glass surface through a deposition process.

[0138] See also Figure 16 As shown, an embodiment of the present application also provides a method for preparing an accessory for an electronic device, wherein the method for preparing an accessory for an electronic device is used to prepare the accessory 10 for the electronic device provided in the above embodiment. It can be understood that the structure of the accessory 10 for the electronic device is described in the above embodiment and will not be repeated here.

[0139] The method for preparing an accessory of an electronic device comprises the following steps:

[0140] S101 , mounting a plurality of solar cell modules on a substrate to form a solar cell unit.

[0141] Specifically, the solar cell module 220 can be automatically mounted on the substrate 210 using a chip mounter.

[0142] S102: Setting a mounting groove on the accessory body.

[0143] The mounting groove 120 can be made by injection molding or flat plate molding.

[0144] S103: Install the solar cell unit in the installation groove.

[0145] Specifically, the solar cell unit 200 may be bonded into the mounting groove 120 .

[0146] It should be noted that there is no specific order between step S101 and step S102. It is understandable that step 102 may be performed first and then step 101; or step 101 and step 102 may be performed simultaneously.

[0147] The method for preparing an accessory for an electronic device provided in an embodiment of the present application prevents the solar cell unit 200 from occupying space on a watch dial or mobile phone, thereby reducing the thickness of the watch dial or mobile phone. The solar cell unit 200 includes a substrate 210 and multiple solar cell modules 220. Each solar cell module 220 absorbs light energy and converts it into electrical energy, which is then transmitted through the substrate 210 to an electronic device 1, such as a watch dial or mobile phone. This allows the solar cell module 220 and the battery within the electronic device 1 to jointly power the electronic device 1, or the solar cell module 220 to power the battery within the electronic device 1. This increases the standby time of the electronic device 1 and expands the functionality of the accessory body 100. Furthermore, each solar cell module 220 is miniaturized and securely integrated on the substrate 210 through mounting. The substrate 210 is positioned within the mounting slot 120 of the accessory body 100, with each solar cell module 220 at least partially located within the mounting slot 120 of the accessory body 100. This prevents the solar cell unit 200 from occupying too much space in the thickness of the accessory body 100 .

[0148] See also Figure 17 As shown, an embodiment of the present application provides a method for preparing an accessory of an electronic device, comprising the following steps:

[0149] S201, preparing a substrate.

[0150] like Figure 18aAs shown, specifically, the substrate 210 can be prepared by a masking method (also known as a tenting process) to achieve patterning of the first copper layer 212 and the second copper layer 214. The substrate 210 prepared by the tenting process has a lower cost, a smoother surface, and better reflectivity.

[0151] The substrate 210 may include a first green paint layer 211, a first copper layer 212, a dielectric layer 213, a second copper layer 214, and a second green paint layer 215, which are stacked in sequence. The dielectric layer 213 has a plurality of vias 2131, which connect the first copper layer 212 and the second copper layer 214. The first green paint layer 211 and the second green paint layer 215 may be black.

[0152] S202 , mounting the solar cell module on the substrate, and encapsulating the solar cell module and the substrate to form a solar cell unit.

[0153] like Figure 18b As shown, specifically, the solar cell module 220 may include a single crystal silicon 221, a silicon nitride 222 and an anti-reflection film stacked in sequence. Each solar cell module 220 is placed on the substrate 210 in sequence and mounted on the substrate 210 by SMT (for example, surface mount technology). Among them, reflow soldering can be used to fix each solar cell module 220 on the substrate 210. In this way, the solar cell module 220 is firmly connected to the substrate 210, and the connection strength between each solar cell module 220 and the substrate 210 is high. Even when wearing a watch for running or other sports, each solar cell module 220 is not easy to fall off. In addition, the solar cell module 220 is fixed to the substrate 210 by mounting, which shortens the processing time and saves costs. The single crystal silicon 221 is electrically connected to the first copper layer 212 or the second copper layer 214.

[0154] Each solar cell module 220 is encapsulated on the substrate 210 by a light-transmitting encapsulation layer 230, thereby forming a solar cell unit 200. The solar cell module 220 is located within the light-transmitting encapsulation layer 230. The light-transmitting encapsulation layer 230 is a transparent epoxy resin layer or EVA plastic layer, and is tightly bonded to the first green oil layer 211. A wire or FPC is electrically connected to the second copper layer 214 by hot press soldering (e.g., hot bar), laser welding (e.g., ACF), or spot welding, thereby forming an electrical connection portion 216.

[0155] S203: Processing the accessory body with the installation groove.

[0156] like Figure 18cAs shown, specifically, the accessory body 100 having the mounting groove 120 can be manufactured by injection molding or flat-plate compression molding. For example, the accessory body 100 can be a watchband, and the material of the watchband includes, but is not limited to, fluororubber, leather, or titanium alloy. The mounting groove 120 has an inner side surface 121 and a groove bottom surface 122. The mounting groove 120 can be roughened by tool friction or solution etching (e.g., allyltriethoxysilane solution) to ensure that the inner side surface 121 and / or the groove bottom surface 122 are roughened. This allows the solar cell 200 to be more firmly bonded within the mounting groove 120.

[0157] S204, filling the installation groove with adhesive.

[0158] like Figure 18d As shown, specifically, an excess amount of rubber adhesive is filled in the mounting groove 120. The rubber adhesive is used to adhere the solar cell unit 200 in the mounting groove 120 to improve the reliability of the solar cell unit 200.

[0159] The adhesive may adopt a multi-layer structure, and illustratively, the adhesive may also include fluororubber adhesive, RTV silicone rubber, etc. After the adhesive is substantially cured, it is placed in a high-temperature oven for curing.

[0160] S205: Place the solar cell unit into the installation slot.

[0161] like Figure 18e Specifically, the solar cell unit 200 is pressed into the mounting groove 120 and maintained under a certain pressure for several minutes to fully cure the excess adhesive inside the mounting groove 120. The excess adhesive on the surface of the solar cell unit 200 and the notch of the mounting groove 120 is wiped off with acetone. The adhesive forms a first bonding layer 250.

[0162] S206 , bonding the light-transmitting protective layer to the top of the solar cell unit.

[0163] like Figure 8 Specifically, the light-transmitting protective layer 240 is made of at least one of a glass-ceramic layer and tempered glass. The light-transmitting protective layer 240 is bonded to the light-transmitting encapsulation layer 230 using an OCA optical adhesive or a rubber adhesive. This ensures a secure connection between the light-transmitting protective layer 240 and the light-transmitting encapsulation layer 230 while allowing light to enter the solar cell module 220 normally without affecting the solar cell module 220's ability to absorb light energy.

[0164] See also Figure 19 As shown, the embodiment of the present application also provides another method for preparing an accessory of an electronic device. The first three steps of the method are the same as those described above. Figure 17 The first three steps (eg, step S201 to step S203) in the embodiment are the same, and reference may be made to the above description, which will not be repeated here.

[0165] The method for preparing an accessory for an electronic device comprises the following steps:

[0166] S304, preparing a reflective layer.

[0167] like Figure 20a As shown, the reflective layer 300 may include a transparent substrate 310 and a reflective portion 320 disposed on the transparent substrate 310. The transparent substrate 310 may be tempered glass or glass-ceramics. The surface of the tempered glass or glass-ceramics is coated with a trace amount of stannous chloride solution, silver nitrate solution, and reducing solution to form, for example, the reflective portion 320 (a silver layer or an aluminum layer).

[0168] S305: Bonding the reflective layer in the installation groove.

[0169] like Figure 20b Specifically, a rubber adhesive is applied to the mounting groove 120, and the reflective layer 300 is bonded to the inner side surface 121 of the mounting groove 120 via the rubber adhesive. Thus, the reflective layer 300 and the groove bottom surface 122 together form a receiving cavity 123. After the rubber adhesive is substantially cured, the accessory body 100 with the reflective layer 300 is placed in a high-temperature oven for curing. This allows the transparent substrate 310 in the reflective layer 300 to partially harden the cavity structure, thereby improving the bonding strength.

[0170] S306: Fill the receiving cavity with adhesive.

[0171] like Figure 20c As shown, specifically, an excess amount of rubber adhesive is filled on the bottom surface 122 of the mounting groove 120 and the reflective layer 300. The rubber adhesive is used to bond the solar cell unit 200 to the accommodating cavity 123 to improve the reliability of the solar cell unit 200 (such as the substrate 210, the solar cell module 220 and the light-transmitting packaging layer 230).

[0172] S307: Place the solar cell unit into the receiving cavity.

[0173] like Figure 20d As shown, specifically, the solar cell unit 200 (such as the substrate 210, the solar cell module 220 and the light-transmitting packaging layer 230) is pressed into the accommodating cavity 123 and maintained under a certain pressure for several minutes to allow the excess adhesive inside the accommodating cavity 123 to fully solidify, and the overflowing adhesive on the surface of the solar cell unit 200 and the groove of the accommodating cavity 123 is wiped off with acetone.

[0174] S308 , bonding the light-transmitting protective layer to the top of the solar cell unit. The adhesive forms a first bonding layer 250 .

[0175] like Figure 9Specifically, the light-transmitting protective layer 240 is made of at least one of a glass-ceramic layer and tempered glass. The light-transmitting protective layer 240 is bonded to the light-transmitting encapsulation layer 230 using an OCA optical adhesive or a rubber adhesive. This ensures a secure connection between the light-transmitting protective layer 240 and the light-transmitting encapsulation layer 230 while allowing light to enter the solar cell module 220 normally without affecting the solar cell module 220's ability to absorb light energy.

[0176] See also Figure 21 As shown, the embodiment of the present application also provides another method for preparing an accessory of an electronic device, comprising the following steps:

[0177] S401, preparing a substrate.

[0178] The method for preparing the substrate 210 is the same as that described above. Figure 17 The method for preparing the substrate 210 is the same as in the embodiment and will not be repeated here.

[0179] S402 , mounting the solar cell module on a substrate, fixing the electrical connection pillars on the substrate, and electrically connecting the electrical connection pillars to the substrate.

[0180] like Figure 22a As shown, the structure of the solar cell module 220 can be the same as that of the above Figure 17 The solar cell modules 220 have the same structure in the embodiment. Each solar cell module 220 is sequentially placed on the substrate 210 and mounted on the substrate 210 using SMT (surface mount technology). Reflow soldering can be used to secure and electrically connect each solar cell module 220 to the substrate 210.

[0181] Then, the electrical connection between the electrical connection column 500 and the substrate 210 is completed by steel screen printing, or pre-setting solder paste and screen reflow process. Among them, an electrical connection column 500 is set between two adjacent solar cell modules 220, and the electrical connection column 500 can be a copper pin.

[0182] S403, packaging substrate, solar cell module and electrical connection column.

[0183] like Figure 22b As shown, each solar cell module 220 and each electrical connection column 500 are encapsulated on the substrate 210 by a light-transmitting encapsulation layer 230. Each solar cell module 220 and each electrical connection column 500 are located in the light-transmitting encapsulation layer 230. The light-transmitting encapsulation layer 230 is a transparent epoxy resin layer or an EVA plastic layer.

[0184] S404 , thinning the light-transmitting packaging layer to expose the electrical connection pillars.

[0185] like Figure 22cAs shown, the light-transmitting encapsulation layer 230 is mechanically thinned by chemical mechanical polishing (such as CMP) or ultrafine diamond suspension to control the thickness of the light-transmitting encapsulation layer 230 and expose the electrical connection column 500, and then the solar cell module 220, the electrical connection column 500, the light-transmitting encapsulation layer 230 and the substrate 210 are baked and dehumidified.

[0186] S405 , connecting ECG electrodes on the light-transmitting packaging layer, and electrically connecting the ECG electrodes to the electrical connection posts.

[0187] like Figure 22d As shown, the ECG electrode 400 is bonded to the light-transmitting packaging layer 230 with conductive glue, and the ECG electrode 400 is electrically connected to the electrical connection column 500. The conductive glue can be ACF (for example, anisotropic conductive glue). The ECG electrode 400 has a plurality of first through holes 410, and the first through holes 410 are arranged in a one-to-one correspondence with the solar cell module 220. In this way, the solar cell module 220 can be exposed through the first through holes 410, thereby preventing the ECG electrode 400 from blocking the solar cell module 220, thereby affecting the solar cell module 220 from absorbing light energy. The ECG electrode 400 and the light-transmitting packaging layer 230 can be bonded by conductive glue. Then the above-mentioned solar cell unit 200 with the ECG electrode 400 is bonded into the accommodating cavity 123.

[0188] See also Figure 23 As shown, the embodiment of the present application also provides a method for preparing an accessory of an electronic device. The first three steps of the method are the same as those described above. Figure 21 The first three steps (eg, step S401 to step S403) in the embodiment are the same, and reference may be made to the above description, which will not be repeated here.

[0189] The method for preparing an accessory for an electronic device comprises the following steps:

[0190] S504 , connecting a light-transmitting protective layer to the light-transmitting encapsulation layer, and providing mounting holes corresponding to the electrical connection posts on the light-transmitting protective layer.

[0191] like Figure 24a As shown, the transparent packaging layer 230 is adhered to the transparent protective layer 240 by screen printing OCA, and the transparent protective layer 240 is provided with mounting holes (such as the second through hole 241) corresponding to the electrical connection column 500. The mounting holes are formed by dry method, wet chemical method, laser or mechanical drilling.

[0192] S505: Install an electrical connector in the mounting hole.

[0193] like Figure 24bAs shown, the second through hole 241 can be filled with a conductor by electroplating or silk screen plugging to form an electrical connector 2411. The light-transmitting protective layer 240 is then polished by chemical mechanical polishing (such as CMP) or mechanical thinning to make the surface of the light-transmitting protective layer 240 smooth.

[0194] S506 , connecting ECG electrodes on the light-transmitting protective layer, wherein the ECG electrodes are electrically connected to the electrical connection posts via electrical connectors.

[0195] like Figure 24c As shown, the ECG electrode 400 is bonded to the light-transmitting protective layer 240 using conductive adhesive. The ECG electrode 400 is electrically connected to the electrical connection post 500 via an electrical connector 2411. The conductive adhesive can be ACF. The solar cell unit 200 with the ECG electrode 400 is then bonded into the receiving cavity 123.

[0196] The above specific implementation methods further illustrate the purpose, technical solutions and beneficial effects of this application in detail. It should be understood that the above are only specific implementation methods of this application and are not intended to limit the scope of protection of this application. Any modifications, equivalent replacements, improvements, etc. made on the basis of the technical solutions of this application should be included in the scope of protection of this application.

Claims

1. A watch strap for wearing an electronic device, wherein the electronic device is a smart watch, characterized in that: include: strap body; a solar cell unit, disposed on the watch band body, the solar cell unit comprising a plurality of solar cell modules and a substrate, configured to be electrically connected to the electronic device through the substrate and to supply power to the electronic device; a plurality of electrical connection posts, disposed on the substrate, at least one electrical connection post being disposed between adjacent solar cell modules, one end of each electrical connection post being electrically connected to the substrate; A light-transmitting encapsulation layer, wherein each of the solar cell modules and each of the electrical connection pillars is encapsulated on the substrate through the light-transmitting encapsulation layer; a light-transmitting protective layer covering a surface of the light-transmitting encapsulation layer facing away from the substrate and covering each of the solar cell modules, wherein a plurality of second through holes are formed in the light-transmitting protective layer, the second through holes being arranged in a one-to-one correspondence with the electrical connection posts, and an electrical connector being disposed in each of the second through holes; an ECG electrode, wherein the ECG electrode is a transparent electrode having a plurality of first through holes, covering a surface of the light-transmitting protective layer facing away from the light-transmitting encapsulation layer; the first through holes correspond one-to-one to each of the solar cell modules, the ECG electrode is electrically connected to the solar cell unit through the first through holes, and is electrically connected to the other end of the electrical connection column through the electrical connector to achieve electrical connection with the electronic device; A mounting groove is provided on the outer surface of the strap body and is located near the display portion of the electronic device. The mounting groove is used to accommodate the solar cell unit, the light-transmitting packaging layer and the ECG electrode, and the ECG electrode is at least partially exposed in the mounting groove. Each of the solar cell modules and the light-transmitting packaging layer is located in the mounting groove.

2. The watch strap according to claim 1, characterized in that The mounting groove has an inner side surface and a groove bottom surface, and the mounting groove is integrally formed with the watchband body.

3. The watch strap according to claim 1, characterized in that: The light-transmitting packaging layer is a transparent epoxy resin layer, an EVA plastic layer or a POE plastic layer.

4. The watch strap according to claim 1, characterized in that The solar cell modules are evenly spaced and arranged on the substrate.

5. The watch strap according to claim 2, characterized in that: Also includes: The reflective layer comprises a transparent substrate and a reflective portion disposed on the transparent substrate, wherein the reflective portion faces the inner side surface and is bonded to the inner side surface.

6. The watch strap according to claim 5, characterized in that: One of the inner side surface and the reflective layer is an inclined surface, so that the size of the notch of the installation groove is smaller than the size of the bottom surface of the groove.

7. The watch strap according to claim 5, characterized in that: The end of the light reflecting layer away from the bottom surface of the groove is flush with the light-transmitting protective layer.

8. The watch strap according to claim 1, characterized in that The ECG electrode is a nano silver wire thin film electrode, a carbon nanotube coating, a silk screen coating or an electroplating coating.

9. The watch strap according to claim 1, characterized in that: The substrate is a circuit board having at least two electrical connection parts, and the electrical connection parts are used for electrical connection of the electronic equipment.

10. The watch strap according to claim 2, characterized in that: At least one of the groove bottom surface and at least a portion of the inner side surface is a rough surface.

11. The watch strap according to claim 5, characterized in that: The reflective layer is arranged on the inner side surface, and the reflective layer and the bottom surface of the groove together form an accommodating cavity. The substrate, the light-transmitting encapsulation layer and the light-transmitting protective layer are connected to the accommodating cavity.

12. The watch strap according to claim 1, characterized in that The watch strap is detachably connected to the device body of the electronic device.

13. A method for preparing a watch strap, wherein the watch strap is used for wearing an electronic device, wherein the electronic device is a smart watch, wherein: include: A plurality of solar cell modules are mounted on a substrate to form a solar cell unit, and a plurality of electrical connection posts are fixed on the substrate, with one end of each electrical connection post being electrically connected to the substrate; wherein at least one electrical connection post is provided between adjacent solar cell modules; Encapsulating each of the solar cell modules and each of the electrical connection pillars on the substrate through a light-transmitting encapsulation layer, wherein each of the solar cell modules and each of the electrical connection pillars are located within the light-transmitting encapsulation layer; A mounting groove is provided on the outer surface of the strap body at a position close to the display portion of the electronic device; Installing the substrate and the solar cell unit in the installation groove; wherein each of the solar cell modules and the light-transmitting encapsulation layer are located in the installation groove; A light-transmitting protective layer is connected to the light-transmitting encapsulation layer, the light-transmitting protective layer covers the surface of the light-transmitting encapsulation layer facing away from the substrate and covers each of the solar cell modules; a plurality of second through holes corresponding to the electrical connection posts are defined in the light-transmitting protective layer, and an electrical connector is disposed in each of the second through holes; An ECG electrode is connected to the light-transmitting packaging layer, wherein the ECG electrode is a transparent electrode having a plurality of first through holes, covering the surface of the light-transmitting protective layer facing away from the light-transmitting packaging layer and at least partially exposed in the mounting groove, the first through holes being arranged in a one-to-one correspondence with the solar cell module, being electrically connected to the solar cell unit through the first through holes, and being electrically connected to the other end of the electrical connection column through the electrical connector.

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