Electronic shelf label and manufacturing method thereof

Abstract

The present invention provides an electronic shelf label and a manufacturing method thereof, wherein the manufacturing method of the electronic shelf label comprises: a front cover plate and an electronic paper display screen are bonded by an optically transparent bonding agent OCA, after bonding, the side of the electronic paper display screen is sealed with a waterproof edge-sealing glue to form a display component; the front cover plate is a transparent plastic cover plate; the assembled printed circuit board PCBA is crimped with the display component, after crimping, the battery and the PCBA are welded together to form an electrical component; the peripheral edge of the rear shell is bonded with the peripheral edge of the front cover plate, after bonding, the front cover plate and the rear shell protruding away from the electrical component form a receiving space; epoxy resin glue is injected into the receiving space, and the epoxy resin glue is cured to form a complete machine. The electronic shelf label provided by the above technical solution has a long service life, a thin thickness and a good display effect.

Description

Technical Field

[0001] The present invention relates to the technical field of electronic shelf labels, and in particular to an electronic shelf label and a manufacturing method thereof. Background Art

[0002] like Figure 1 As shown, the existing electronic shelf labels (ESL) are, from left to right: protective lens (Lens), electronic paper display screen (Screen), silica gel (Silica gel), assembled printed circuit board (PCBA), shell (Frame) and battery box (Battery). The functions of each component are: the protective lens and silica gel provide protection for the electronic paper display screen to prevent external impact and fall damage to the electronic paper display screen; the assembled printed circuit board realizes the relevant functions of the electronic shelf label; the button battery in the battery box provides power for the electronic shelf label. The manufacturing process of the electronic shelf label is: the welded circuit board is fixed to the shell by a buckle; the protective lens is fixed to the shell by hot melt adhesive or ultrasonic welding. The disadvantages of this electronic shelf label solution include:

[0003] 1. It is impossible to completely isolate water molecules. After long-term use, water molecules can easily invade the inside of the product from the edge sealing, and then invade the electronic paper, the main material of the electronic paper display screen. Electronic paper is sensitive to water vapor, causing the characteristics of the electronic paper to change, resulting in abnormal display and product failure.

[0004] 2. The protective lens and the electronic paper display screen cannot be completely fitted, the electronic paper display screen has poor light transmittance, and dust or foreign matter enters between the electronic paper display screen and the protective lens, causing product display defects.

[0005] 3. The existing solution uses conventional technology, which makes it difficult to achieve a lightweight design for the product. The entire product is heavy, which is very different from traditional paper electronic shelf labels, and creates obstacles to the comprehensive use of electronic shelf labels.

[0006] To address the above problems, no effective solution has been proposed yet. Summary of the invention

[0007] An embodiment of the present invention provides a method for manufacturing an electronic shelf label, which is used to provide an electronic shelf label with a long service life, a thin thickness and a good display effect. The method comprises:

[0008] The front cover plate and the electronic paper display screen are bonded together by an optically transparent bonding agent OCA. After bonding, the side edges of the electronic paper display screen are sealed with a waterproof edge sealing glue to form a display assembly; the front cover plate is a transparent plastic cover plate;

[0009] The assembled printed circuit board PCBA is crimped with the display assembly, and after the crimping is completed, the battery and the PCBA are welded together to form an electrical assembly;

[0010] The peripheral edge of the rear shell is bonded to the peripheral edge of the front cover. After bonding, the front cover and the protruding portion of the rear shell facing away from the electrical components form a receiving space. Epoxy resin glue is injected into the receiving space, and the epoxy resin glue is cured to form a complete machine.

[0011] The embodiment of the present invention further provides an electronic shelf label, which is used to provide an electronic shelf label with a long service life, a thin thickness and a good display effect. The electronic shelf label includes:

[0012] Electrical components; the electrical components include: a display component, an assembled printed circuit board PCBA and a battery; the display component includes: a front cover plate and an electronic paper display screen, wherein the front cover plate and the electronic paper display screen are bonded together by an optically transparent bonding agent OCA, and after bonding, the side edges of the electronic paper display screen are sealed with a waterproof edge-sealing glue; the front cover plate is a transparent plastic cover plate; the PCBA and the display component are connected by crimping, and the battery and the PCBA are welded together;

[0013] A rear shell, wherein the peripheral edge of the rear shell is bonded to the peripheral edge of the front cover, and after bonding, the front cover and the protruding portion of the rear shell facing away from the electrical component form a receiving space;

[0014] Epoxy resin glue is injected into the accommodation space, and the epoxy resin glue is cured to form a complete machine.

[0015] Compared with the electronic shelf label solution in the prior art, the technical solution provided by the embodiment of the present invention achieves the following beneficial technical effects:

[0016] 1. In the embodiment of the present invention: the edge-sealed display component is edge-sealed with waterproof edge-sealing glue at the edge position most susceptible to water vapor, that is, the side of the electronic paper display screen, to isolate the electronic paper display screen from water vapor in the external environment, and epoxy resin glue is injected into the accommodating space formed by the protruding portion of the front cover and the rear shell facing away from the electrical component, to further seal the electrical component including the electronic paper screen, further isolate water vapor, greatly extend the service life of the electronic paper display screen, and further extend the service life of the electronic shelf label.

[0017] 2. The embodiment of the present invention uses a thin transparent plastic cover plate instead of a thick protective lens, and the thickness of the whole device is reduced by about 50% compared with the traditional design, and the overall experience is closer to the effect of paper electronic shelf labels.

[0018] 3. In the embodiment of the present invention: the front cover plate and the electronic paper display screen are tightly bonded together by an optically transparent adhesive OCA, and the front cover plate is also a transparent plastic cover plate, which improves the light transmittance and thus improves the display effect of the electronic shelf label.

[0019] In addition, epoxy resin glue is injected into the accommodation space formed by the protruding portion of the front cover and the rear shell facing away from the electrical components. After the epoxy resin glue is cured, the whole machine is formed. The whole machine has high strength, which further extends the service life of the electronic shelf label.

[0020] In summary, the electronic shelf label provided by the embodiment of the present invention has a long service life, a thin thickness and a good display effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0022] Figure 1 It is a schematic diagram of the structure of an electronic shelf label in the prior art;

[0023] Figure 2 is a schematic flow chart of a method for manufacturing an electronic shelf label in an embodiment of the present invention;

[0024] Figure 3 is a schematic diagram of the principle of manufacturing an electronic shelf label in an embodiment of the present invention;

[0025] Figure 4 is a schematic diagram of a side cross-sectional structure of an electronic shelf label according to an embodiment of the present invention;

[0026] Figure 5 Schematic diagram of the structure of the electronic shelf label in an embodiment of the present invention. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] Before introducing the embodiments of the present invention, the nouns and full names involved in the embodiments of the present invention are first introduced.

[0029] 1. ESL: Electronic Shelf Label.

[0030] 2. MCU: Micro Controller Unit.

[0031] 3. RF: Radio Frequency.

[0032] 4. EPD: Electronic Paper Displays.

[0033] 5. SiP: System in Package.

[0034] 6. SoC: System on Chip, chip level system.

[0035] 7. PCB: Printed Circuit Board.

[0036] 8. PCBA: Printed Circuit Board Assembly, assembled printed circuit board.

[0037] 9. NFC: Near Field Communication.

[0038] 10. ACF: Anisotropic Conductive Film.

[0039] 11. CNC: Computerized Numerical Control, CNC machine tools.

[0040] 12. OCA: Optically Clear Adhesive.

[0041] The inventors found that the technical problems of the existing electronic shelf label solutions are:

[0042] 1. The protective lens and the shell are fixed by ultrasonic welding, hot melt adhesive bonding or snap fastening, which cannot completely isolate water molecules from invading the interior of the electronic shelf label product. The electronic paper widely used in the electronic paper display screen of the electronic shelf label is sensitive to water vapor. The main reason for its failure is that after long-term use, water molecules invade from the edge sealing, causing the electronic paper characteristics to change, resulting in abnormal display.

[0043] 2. In conventional designs, the protective lens and the electronic paper display screen cannot fit perfectly, the screen has poor light transmittance, and dust or foreign matter enters between the electronic paper display screen and the protective lens, resulting in display defects of electronic shelf label products.

[0044] 3. The existing design uses conventional technology, the whole product is heavy, and it is very different from traditional paper labels, which creates obstacles to the full use of electronic shelf labels.

[0045] Therefore, the inventors have considered the above technical problems and proposed an electronic shelf label and a manufacturing solution thereof, which solves the following problems:

[0046] 1. Isolate the main components such as the electronic paper display screen, circuit board, battery, etc. from the external environment to prevent the invasion of water molecules and solve the problem of the electronic paper display screen being affected by water vapor and failing.

[0047] 2. Solve the problem of gap between the protective lens and the electronic paper display screen, resulting in poor light transmittance and deteriorated display effect.

[0048] 3. Solve the problem of the weight of the whole product, and the whole machine is closer to the use of paper labels, which is conducive to the large-scale promotion of electronic shelf labels.

[0049] The electronic shelf label and its manufacturing solution are introduced in detail below.

[0050] Figure 2 FIG. 1 is a flow chart of a method for manufacturing an electronic shelf label according to an embodiment of the present invention. Figure 2 As shown, the method comprises the following steps:

[0051] Step 101: The front cover plate and the electronic paper display screen are bonded together by using an optically transparent bonding agent OCA. After bonding, the sides of the electronic paper display screen are sealed by using a waterproof edge sealing glue to form a display assembly; the front cover plate is a transparent plastic cover plate;

[0052] Step 102: crimping the assembled printed circuit board PCBA to the display assembly, and after the crimping is completed, welding the battery and the PCBA together to form an electrical assembly;

[0053] Step 103: Bond the peripheral edge of the rear shell to the peripheral edge of the front cover. After bonding, the front cover and the protruding portion of the rear shell facing away from the electrical components form a receiving space; inject epoxy resin glue into the receiving space, and the epoxy resin glue is cured to form a complete machine.

[0054] Next, combine Figures 2 to 5 , each step involved in the embodiment of the present invention is introduced in detail.

[0055] 1. First, the above step 101 is introduced.

[0056] When implementing it, Figure 3 and Figure 5 As shown, the main process of the above step 101 is:

[0057] 1. A transparent polyethylene terephthalate plastic PET, polycarbonate PC or polymethyl methacrylate PMMA material is cut to form a front cover 1.

[0058] In one embodiment, the manufacturing method of the electronic shelf label may further include: a step of pre-cleaning the front cover.

[0059] In specific implementation, the PET pretreatment completes the cleaning of the PET film, so that the subsequent PET and OCA are more firmly bonded, thereby making the electronic shelf label more secure.

[0060] 2. Screen OCA bonding:

[0061] In one embodiment, the front cover plate and the electronic paper display screen are bonded together by an optically transparent bonding agent OCA. After bonding, the side edge of the electronic paper display screen is sealed with a waterproof edge sealing glue to form a display assembly, which may include:

[0062] The front cover and the electronic paper display screen are bonded together by an optically transparent adhesive OCA (the OCA is Figure 5 (not shown) are fitted together;

[0063] After the bonding is completed, the air bubbles that may be introduced during the bonding are eliminated through the degassing process;

[0064] After the degassing process is completed, the sides of the electronic paper display screen are sealed with waterproof edge sealing glue to form a display component.

[0065] In specific implementation, the front cover plate and the display screen are bonded together by OCA glue, and the bubbles that may be introduced during bonding are eliminated through a degassing process, thereby improving the quality of the electronic shelf label.

[0066] 3. Screen edge sealing: After the lamination and degassing process, the sides of the display screen (if the shape of the electronic label is a quadrilateral, then it is "four sides", for example, you can refer to the four side edges of a mobile phone. Of course, if the electronic shelf label is designed to be circular or elliptical, it can be the side of a circular or elliptical shape, such as a circumferential edge) are sealed with a special waterproof edge sealing glue (the special waterproof edge sealing glue is Figure 5 The edge sealing is performed on the substrate (not shown) to form a screen assembly (display assembly), and the display assembly is formed after the edge sealing is completed.

[0067] The EPD electronic paper screen commonly used in existing electronic shelf labels is sensitive to water vapor in the use environment. After long-term use, water molecules usually invade the display material electronic paper from all sides, resulting in display abnormalities. In the embodiment of the present invention, the edge-sealed display component is edge-sealed with waterproof edge-sealing glue at the edge position most susceptible to water vapor, isolating the screen from water vapor in the external environment, greatly extending the service life of the electronic paper screen, and further extending the service life of the electronic shelf label.

[0068] 2. Next, the above step 102 is introduced.

[0069] When implementing it, Figure 3 and Figure 5 As shown, the main process of the above step 102 is:

[0070] 1. PCBA preparation: The relevant components of the electronic shelf label are soldered to the PCB board, and the relevant programs of the electronic shelf label are burned.

[0071] 2. ACF crimping: PCBA and screen assembly complete the connection of electrical signals (such as display control signals from receiving base stations, product price update signals, etc.) through ACF crimping.

[0072] In one embodiment, crimping the assembled printed circuit board PCBA3 with the display assembly may include: crimping the assembled printed circuit board PCBA with the display assembly through an ACF process.

[0073] In specific implementation, the PCBA and the display assembly are crimped and connected through the ACF process to ensure the firmness of the electronic shelf label.

[0074] 3. Battery welding: Weld the positive and negative contacts of the battery 4 to the PCBA to form a complete electrical assembly.

[0075] After the PCB welding is completed, the PCBA and display components are crimped through the ACF process, and then the battery welding is completed to form a complete electrical assembly.

[0076] 3. Next, the above step 103 is introduced.

[0077] When implementing it, Figure 3 and Figure 5 As shown, the implementation process of the above step 103 mainly includes:

[0078] 1. Use hot melt adhesive to bond the electrical components to the back cover.

[0079] In one embodiment, bonding the peripheral edge of the rear shell to the peripheral edge of the front cover includes: bonding the peripheral edge of the rear shell to the peripheral edge of the front cover by hot melt adhesive.

[0080] In a specific implementation, the peripheral edge of the rear shell is bonded to the peripheral edge of the electrical component by hot melt adhesive to ensure the firmness of the electronic shelf label. If the electronic shelf label is a quadrilateral, the peripheral edge mentioned above can be the peripheral edge. Of course, if the electronic shelf label is circular, it can be the circumferential edge, etc.

[0081] 2. Potting: Inject epoxy resin glue into the back shell.

[0082] In one embodiment, injecting epoxy resin glue into the accommodation space may include: injecting epoxy resin glue into the accommodation space through a glue injection port (such as Figure 5 The black filled area shown in the figure is all the gaps between the front cover and the back cover, including the long strip gap between the back cover and the electrical components. The epoxy resin glue injected into the accommodation space fully covers the electronic paper display screen including the electrical components, further preventing water vapor from entering, further improving the service life of the electronic paper display screen, and further improving the service life of the electronic shelf label. Figure 4 Among them, 8 is edge sealing glue and 9 is epoxy resin glue.

[0083] 3. Curing: After a certain period of time, the epoxy resin glue is fully bonded and cured to form a complete machine.

[0084] The electrical components are bonded to the back shell with hot melt glue. After bonding, epoxy resin glue is added through the glue injection port 6 to complete the bonding of the electrical components and the back shell, and further seal the electrical components. After the epoxy resin glue is cured, a high-strength sealed whole machine is formed.

[0085] In summary, the technical solution provided in this embodiment realizes:

[0086] 1. Use edge sealing glue on the edge of the screen to block water vapor from entering the four sides of the screen, thereby increasing the service life of the entire machine.

[0087] 2. Use potting epoxy resin glue to isolate the screen from external environmental moisture, thereby increasing the service life of the entire machine.

[0088] 3. Using OCA in electronic shelf labels fully fits the protective front cover and the electronic paper display screen, improving light transmittance and thus improving the display effect.

[0089] 4. Using thin PET film instead of thick protective lenses, the thickness of the whole machine is reduced by about 50% compared with the traditional design, and the overall experience is closer to the effect of paper electronic shelf labels.

[0090] 5. The use of potting epoxy resin glue in electronic shelf labels increases the structural strength of the entire machine.

[0091] Based on the same inventive concept, an electronic shelf label is also provided in the embodiment of the present invention, as described in the following embodiment. Since the principle of solving the problem by the electronic shelf label is similar to the manufacturing method of the electronic shelf label, the implementation of the electronic shelf label can refer to the implementation of the manufacturing method of the electronic shelf label, and the repeated parts will not be repeated.

[0092] Figure 5 is a schematic diagram of the structure of an electronic shelf label according to an embodiment of the present invention. Figure 5 As shown, the electronic shelf label includes:

[0093] Electrical components; the electrical components include: a display component, an assembled printed circuit board PCBA3 and a battery 4; the display component includes: a front cover plate 1 and an electronic paper display screen 2, wherein the front cover plate and the electronic paper display screen are bonded together by an optically transparent bonding agent OCA, and after bonding, the side edges of the electronic paper display screen are sealed with a waterproof edge sealing glue; the front cover plate is a transparent plastic cover plate;

[0094] A rear shell 5, the peripheral edge of the rear shell is bonded to the peripheral edge of the front cover, and after bonding, the front cover and the protruding portion of the rear shell facing away from the electrical components form a receiving space;

[0095] Epoxy resin glue is injected into the accommodation space, and the epoxy resin glue is cured to form a complete machine.

[0096] In one embodiment, the peripheral edge of the rear shell is bonded to the peripheral edge of the front cover plate by hot melt adhesive.

[0097] In one embodiment, Figure 5 As shown, the electronic shelf label may further include: a glue filling port 6, which is arranged on the side of the rear shell and is used to inject epoxy resin glue into the accommodation space.

[0098] In one embodiment, the glue filling port is arranged on a side edge of the rear shell.

[0099] During specific implementation, the glue filling port is arranged on the side of the rear shell, which is beautiful and elegant.

[0100] In one embodiment, Figure 5 As shown, a glue filling port cover 7 is provided on the glue filling port.

[0101] In a specific implementation, the glue filling cover can be a sticker, and the setting of the glue filling cover facilitates the glue filling implementation of the electronic shelf label.

[0102] In one embodiment, the PCBA and the display assembly are crimped and connected through an ACF process.

[0103] In one embodiment, after the front cover plate and the electronic paper display screen are bonded together by optically transparent adhesive OCA, bubbles that may be introduced during bonding are eliminated by a degassing process, and then the sides of the electronic paper display screen are sealed with waterproof edge sealing glue to form a display assembly.

[0104] In one embodiment, the thickness of the electronic shelf label may range from 6 mm to 7 mm.

[0105] In specific implementation, the thickness of the electronic shelf label ranges from 6 mm to 7 mm, which is beautiful and elegant.

[0106] In one embodiment, the thickness of the electronic shelf label is 6.5 mm.

[0107] In specific implementation, the thickness of the electronic shelf label is 6.5 mm, which is more beautiful and elegant.

[0108] In one embodiment, the thickness of the front cover plate ranges from 0.2 mm to 1.2 mm.

[0109] In a specific implementation, the thickness of the front cover plate ranges from 0.2 mm to 1.2 mm, which is beautiful and elegant.

[0110] In one embodiment, the thickness of the front cover plate is 0.5 mm.

[0111] In specific implementation, the thickness of the front cover is 0.5 mm, which is more beautiful and elegant.

[0112] In one embodiment, the electronic shelf label is in a rectangular shape.

[0113] In specific implementation, the electronic shelf label is in a rectangular shape, which is beautiful and easy to implement.

[0114] In one embodiment, the width of the front cover plate is wider than the width of the electrical component, and the difference between the width of the front cover plate and the width of the electrical component is in the range of 1.2 mm to 1.6 mm; the length of the front cover plate is longer than the length of the electrical component, and the difference between the length of the front cover plate and the length of the electrical component is in the range of 1.2 mm to 1.6 mm.

[0115] In a specific implementation, the difference setting scheme of the thickness of the electronic shelf label, the thickness of the front cover plate, the length and width of the front cover plate and the length and width of the electrical component facilitates the electronic shelf label to form a storage space that fully covers the electronic paper display screen, further isolates water vapor, greatly prolongs the service life of the electronic paper display screen, and further prolongs the service life of the electronic shelf label.

[0116] In one embodiment, the front cover is a cover made of polyethylene terephthalate plastic PET, a cover made of polycarbonate PC, or a cover made of polymethyl methacrylate PMMA.

[0117] In specific implementation, the advantages of the front cover being a cover made of polyethylene terephthalate plastic PET, a cover made of polycarbonate PC, or a cover made of polymethyl methacrylate PMMA include:

[0118] 1. Use thin polyethylene terephthalate plastic PET cover, polycarbonate PC cover or polymethyl methacrylate PMMA cover instead of thick protective lenses. The thickness of the whole machine is reduced by about 50% compared with the traditional design, and the overall experience is closer to the effect of paper electronic shelf labels.

[0119] 2. The front cover is a transparent polyethylene terephthalate plastic PET cover, polycarbonate PC cover or polymethyl methacrylate PMMA cover, which improves light transmittance and thus improves the display effect of the electronic shelf label.

[0120] The beneficial technical effects of the technical solution provided by the embodiment of the present invention are:

[0121] 1. The electrical components including the electronic paper display screen are fully coated with epoxy resin glue and fully isolated from external moisture. The accelerated aging test verifies that the equivalent life of the screen is extended from 5 years to 10 years.

[0122] 2. Use potting glue epoxy resin to increase the strength of the whole machine, and use a thin transparent plastic cover, such as a transparent polyethylene terephthalate plastic PET cover, polycarbonate PC cover or polymethyl methacrylate PMMA cover instead of a thick protective lens. The thickness of the whole machine is reduced by about 50% compared with the traditional design, and the overall experience is closer to the effect of a paper price tag.

[0123] 3. The front cover fits tightly with the screen, improving light transmittance and display effect.

[0124] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the embodiments of the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A method for manufacturing an electronic shelf label, characterized in that: include: The front cover plate and the electronic paper display screen are bonded together by an optically transparent bonding agent OCA. After bonding, the side edges of the electronic paper display screen are sealed with a waterproof edge sealing glue to form a display assembly; the front cover plate is a transparent plastic cover plate; The assembled printed circuit board PCBA is crimped with the display assembly, and after the crimping is completed, the battery and the PCBA are welded together to form an electrical assembly; Bonding the peripheral edge of the rear shell to the peripheral edge of the front cover, after bonding, the front cover and the protruding portion of the rear shell facing away from the electrical component form a receiving space; Epoxy resin glue is injected into the accommodation space, and the epoxy resin glue is cured to form a complete machine.

2. The method for manufacturing an electronic shelf label according to claim 1, wherein: The front cover and the electronic paper display screen are bonded together by an optically transparent adhesive OCA. After bonding, the sides of the electronic paper display screen are sealed with a waterproof edge-sealing glue to form a display assembly, including: The front cover and the electronic paper display screen are bonded together by optically transparent adhesive OCA; After the lamination is completed, the degassing process is carried out; After the degassing process is completed, the sides of the electronic paper display screen are sealed with waterproof edge sealing glue to form a display component.

3. The method for manufacturing an electronic shelf label according to claim 1, wherein: The method of crimping the assembled printed circuit board PCBA with the display assembly comprises: crimping the assembled printed circuit board PCBA with the display assembly through an ACF process.

4. The method for manufacturing an electronic shelf label according to claim 1, wherein: Bonding the peripheral edge of the rear shell to the peripheral edge of the front cover includes: bonding the peripheral edge of the rear shell to the peripheral edge of the front cover by hot melt adhesive.

5. The method for manufacturing an electronic shelf label according to claim 1, wherein: Injecting epoxy resin glue into the accommodation space includes: injecting epoxy resin glue into the accommodation space through a glue injection port.

6. The method for manufacturing an electronic shelf label according to claim 1, wherein: Also includes: The step of pre-cleaning the front cover plate.

7. An electronic shelf label, characterized in that: include: Electrical components; The electrical component includes: a display component, an assembled printed circuit board PCBA and a battery; the display component includes: a front cover plate and an electronic paper display screen, wherein the front cover plate and the electronic paper display screen are bonded together by an optically transparent bonding agent OCA, and after bonding, the side edges of the electronic paper display screen are sealed with a waterproof edge sealing glue; the front cover plate is a transparent plastic cover plate; the PCBA and the display component are connected by crimping, and the battery and the PCBA are welded together; A rear shell, wherein the peripheral edge of the rear shell is bonded to the peripheral edge of the front cover, and after bonding, the front cover and the protruding portion of the rear shell facing away from the electrical component form a receiving space; Epoxy resin glue is injected into the accommodation space, and the epoxy resin glue is cured to form a complete machine.

8. The electronic shelf label according to claim 7, wherein: The peripheral edge of the rear shell is specifically bonded to the peripheral edge of the front cover plate by hot melt adhesive.

9. The electronic shelf label according to claim 7, wherein: Also includes: The glue injection port is arranged on the side of the rear shell and is used to inject epoxy resin glue into the accommodating space.

10. The electronic shelf label according to claim 9, wherein: The glue filling port is arranged on the side of the rear shell.

11. The electronic shelf label according to claim 9 or 10, characterized in that: The glue filling port is provided with a glue filling port cover.

12. The electronic shelf label according to claim 7, wherein: The PCBA and the display assembly are crimped and connected through an ACF process.

13. The electronic shelf label according to claim 7, wherein: The width of the front cover plate is wider than the width of the electrical component, and the difference between the width of the front cover plate and the width of the electrical component is in the range of 1.2 mm to 1.6 mm; the length of the front cover plate is longer than the length of the electrical component, and the difference between the length of the front cover plate and the length of the electrical component is in the range of 1.2 mm to 1.6 mm.

14. The electronic shelf label according to claim 7, wherein: The front cover is a cover made of polyethylene terephthalate plastic PET, a cover made of polycarbonate PC or a cover made of polymethyl methacrylate PMMA.

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