CN113269290A - Electronic shelf label and manufacturing method thereof - Google Patents
Electronic shelf label and manufacturing method thereof Download PDFInfo
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- CN113269290A CN113269290A CN202010093544.2A CN202010093544A CN113269290A CN 113269290 A CN113269290 A CN 113269290A CN 202010093544 A CN202010093544 A CN 202010093544A CN 113269290 A CN113269290 A CN 113269290A
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 34
- 238000002372 labelling Methods 0.000 title description 2
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- 238000003825 pressing Methods 0.000 claims abstract description 36
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 21
- 239000000084 colloidal system Substances 0.000 claims abstract description 8
- 238000004382 potting Methods 0.000 claims abstract description 8
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- KKEYFWRCBNTPAC-UHFFFAOYSA-N Terephthalic acid Chemical compound OC(=O)C1=CC=C(C(O)=O)C=C1 KKEYFWRCBNTPAC-UHFFFAOYSA-N 0.000 claims description 6
- 238000005096 rolling process Methods 0.000 claims description 6
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- 238000007650 screen-printing Methods 0.000 claims description 5
- 238000010030 laminating Methods 0.000 claims description 3
- 238000003801 milling Methods 0.000 claims description 3
- 239000004033 plastic Substances 0.000 claims description 3
- 229920006335 epoxy glue Polymers 0.000 claims 1
- 229920000139 polyethylene terephthalate Polymers 0.000 description 13
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- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 238000004026 adhesive bonding Methods 0.000 description 2
- 230000032683 aging Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
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Images
Classifications
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K19/00—Record carriers for use with machines and with at least a part designed to carry digital markings
- G06K19/06—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code
- G06K19/067—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components
- G06K19/07—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components with integrated circuit chips
- G06K19/077—Constructional details, e.g. mounting of circuits in the carrier
- G06K19/07701—Constructional details, e.g. mounting of circuits in the carrier the record carrier comprising an interface suitable for human interaction
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K19/00—Record carriers for use with machines and with at least a part designed to carry digital markings
- G06K19/06—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code
- G06K19/067—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components
- G06K19/07—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components with integrated circuit chips
- G06K19/077—Constructional details, e.g. mounting of circuits in the carrier
- G06K19/0772—Physical layout of the record carrier
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- Engineering & Computer Science (AREA)
- Computer Hardware Design (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
Abstract
The invention provides an electronic shelf label and a manufacturing method thereof, wherein the method comprises the following steps: assembling the PCBA and the electronic paper display screen together, and welding the battery to the PCBA to form an electrical component; placing the middle frame on the first PET film, forming a first accommodating space by the middle frame and the first PET film, and injecting epoxy resin glue into the first accommodating space to form a first sealing layer; one side of the battery of the electric assembly is fixedly attached to the first sealing layer, a second accommodating space is formed by the middle frame and one side of the electronic paper display screen of the electric assembly, and epoxy resin glue is injected into the second accommodating space to form a second sealing layer; after a second PET film is placed on the second sealing layer, pressing and curing treatment are carried out; and after the first sealing layer and the second sealing layer are cured, forming a complete potting colloid for isolating outside water vapor. The electronic shelf label provided by the technical scheme has the advantages of long service life, thin thickness and easiness in realization of automatic production.
Description
Technical Field
The invention relates to the technical field of electronic shelf labels, in particular to an electronic shelf label and a manufacturing method thereof.
Background
As shown in fig. 1, the conventional Electronic Shelf Label (ESL) is, from left to right: protective lenses (Lens), electronic paper display screens (Screen), silicone gel (Silica gel), assembled Printed Circuit Boards (PCBA), housings (Frame), and Battery packs (Battery). Wherein the functions of each part are as follows: the protective lens and the silica gel provide protection for the electronic paper display screen, and the electronic paper display screen is prevented from being damaged by external force impact and falling; the assembled printed circuit board realizes the related functions of the electronic shelf label; and a button battery in the battery box supplies power for the electronic shelf label. The manufacturing process of the electronic shelf label comprises the following steps: the welded circuit board is fixed on the shell through a buckle; the protective lens is fixed with the shell through hot melt adhesive or ultrasonic welding. Disadvantages of this electronic shelf label solution include:
1. the water molecules can not be thoroughly isolated, and after the water molecules are used for a long time, the water molecules easily invade the interior of the product from the edge sealing position, so that the water molecules invade the electronic paper which is a main material of an electronic paper display screen, and the electronic paper is sensitive to water vapor, so that the characteristic change of the electronic paper is caused, the normal display cannot be realized, and the product is invalid.
2. The conventional process is used in the existing scheme, so that the light and thin design of the product is difficult to realize, the thickness of the whole product is large, the difference from the traditional paper electronic shelf label is huge, and the electronic shelf label is prevented from being used comprehensively.
3. The whole machine assembly of the goods shelf label product has many manual links, and the full-automatic production can not be realized.
In view of the above problems, no effective solution has been proposed.
Disclosure of Invention
The embodiment of the invention provides a manufacturing method of an electronic shelf label, which is used for providing the electronic shelf label with long service life, thin thickness and easy realization of automatic production, and comprises the following steps:
assembling the assembled printed circuit board PCBA and the electronic paper display screen together, and welding the battery to the PCBA to form an electrical component;
placing the middle frame on a first poly terephthalic acid plastic PET film, forming a first accommodating space by the middle frame and the first PET film, and injecting epoxy resin glue into the first accommodating space to form a first epoxy resin glue sealing layer;
one surface of the electric component battery is fixedly attached to the first epoxy resin glue sealing layer, after the attachment is completed, a second accommodating space is formed by the middle frame and one surface of the electric component electronic paper display screen, and epoxy resin glue is injected into the second accommodating space to form a second epoxy resin glue sealing layer;
after a second PET film is placed on one surface, back to the electrical component, of the second epoxy resin glue sealing layer, pressing and curing are carried out to form the electronic shelf label; and after the first epoxy resin glue sealing layer and the second epoxy resin glue sealing layer are cured, a complete potting colloid for isolating external water vapor is formed among the first PET film, the second PET film and the middle frame.
The embodiment of the invention also provides an electronic shelf label, which is used for providing the electronic shelf label with long service life, thin thickness and easy realization of automatic production, and the electronic shelf label comprises:
a first PET film;
the middle frame is placed on the first PET film and then forms a first containing space together with the first PET film, and epoxy resin glue is injected into the first containing space to form a first epoxy resin glue sealing layer;
one surface of a battery of the electrical assembly is fixedly attached to the first epoxy resin glue sealing layer, after the electrical assembly is attached, a second accommodating space is formed by the middle frame and one surface of the electronic paper display screen of the electrical assembly, and epoxy resin glue is injected into the second accommodating space to form a second epoxy resin glue sealing layer; wherein, electric assembly includes: the electronic paper display screen comprises a PCBA, an electronic paper display screen assembled with the PCBA, and a battery welded to the PCBA;
the second PET film is placed on one surface, back to the electric component, of the second epoxy resin glue sealing layer for pressing and curing; and after the first epoxy resin glue sealing layer and the second epoxy resin glue sealing layer are cured, a complete potting colloid for isolating external water vapor is formed among the first PET film, the second PET film and the middle frame.
Compared with the scheme of the electronic shelf label in the prior art, the technical scheme provided by the embodiment of the invention has the following beneficial technical effects:
1. after the first epoxy resin glue sealing layer and the second epoxy resin glue sealing layer are cured, a complete potting colloid for isolating outside water vapor is formed among the first PET film, the second PET film and the middle frame, an electrical assembly comprising the electronic paper display screen is fully coated by the epoxy resin glue and is fully isolated from the outside water vapor, and the service life of the screen is prolonged from 5 years to 10 years through verification of an accelerated aging test.
2. According to the embodiment of the invention, the thin PET film is used for replacing a thick protective lens, the thickness of the whole machine is reduced by about 60% compared with that of the traditional design, and the whole experience is closer to the effect of a paper electronic shelf label.
3. The technical scheme provided by the embodiment of the invention can realize full-automatic production, avoid inconsistency caused by manual operation and reduce labor cost.
In addition, the epoxy resin glue is used for encapsulation to increase the strength of the whole machine, and the service life of the electronic shelf label is further prolonged.
In conclusion, the electronic shelf label provided by the embodiment of the invention has the advantages of long service life, thin thickness and easiness in realization of automatic production.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic diagram of a prior art electronic shelf label;
FIG. 2 is a schematic flow chart of a method for manufacturing an electronic shelf label according to an embodiment of the invention;
FIG. 3 is a schematic illustration of the fabrication of an electronic shelf label in an embodiment of the invention;
FIG. 4 is a schematic structural view of an entire middle frame plate according to an embodiment of the present invention;
FIG. 5 is a schematic diagram of an electronic shelf label in an embodiment of the invention;
fig. 6 is a schematic structural diagram of an entire electronic shelf label board in an embodiment of the invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Before describing the embodiments of the present invention, the terms and full names related to the embodiments of the present invention will be described.
1. ESL: electronic Shelf Label (Electronic Shelf Label).
2. MCU: micro Controller Unit, microcontroller.
3. RF: radio Frequency, Radio Frequency.
4. EPD: electronic Paper Displays.
5. SiP: system in Package.
6. SoC: system on Chip, Chip level System.
7. PCB: printed Circuit Board, Printed Circuit Board.
8. PCBA: printed Circuit Board Assembly, Printed Circuit Board has been assembled.
9. NFC: near Field Communication.
10. ACF: anisotropic Conductive Film.
11. CNC: computerized Numerical Control (CNC).
The inventor finds that the technical problems of the existing electronic shelf label scheme are as follows:
1. the protective lens and the shell are welded through ultrasonic waves, the hot melt adhesive is adhered or the buckle mode is fixed, and water molecules cannot be completely isolated from the inside of the product. The electronic paper widely used in the electronic shelf label is sensitive to water vapor, and the main reason for the failure is that water molecules invade from the edge sealing position after long-time use, so that the characteristic of the electronic paper is changed, and the normal display cannot be realized.
2. The conventional process is used in the existing design, the whole machine product is thick and heavy, the difference from the traditional paper label is huge, and the electronic shelf label is prevented from being used comprehensively.
3. The whole machine assembly of the goods shelf label product has many manual links, and the full-automatic production can not be realized.
Therefore, as the inventor considers the above technical problems, an electronic shelf label and a manufacturing scheme thereof are proposed, which solves the following problems:
1. the electronic paper display screen, the circuit board, the battery and other main components are isolated from the external environment, water molecule invasion is avoided, and the problem that the electronic paper screen is affected by water vapor and has function failure is solved.
2. The problem of thick and heavy product of the whole machine is solved, the whole machine is closer to the use mode of paper labels, and the large-scale popularization of electronic shelf labels is facilitated.
3. The full-automatic production of electronic shelf label products is realized, and manual links are reduced.
The electronic shelf label scheme is described in detail below.
Fig. 2 is a schematic flow chart of a method for manufacturing an electronic shelf label according to an embodiment of the present invention, as shown in fig. 2, the method includes the following steps:
step 101: assembling the assembled printed circuit board PCBA and the electronic paper display screen together, and welding the battery to the PCBA to form an electrical component;
step 102: placing the middle frame on a first poly terephthalic acid plastic PET film, forming a first accommodating space by the middle frame and the first PET film, and injecting epoxy resin glue into the first accommodating space to form a first epoxy resin glue sealing layer;
step 103: one surface of the electric component battery is fixedly attached to the first epoxy resin glue sealing layer, after the attachment is completed, a second accommodating space is formed by the middle frame and one surface of the electric component electronic paper display screen, and epoxy resin glue is injected into the second accommodating space to form a second epoxy resin glue sealing layer;
step 104: after a second PET film is placed on one surface, back to the electrical component, of the second epoxy resin glue sealing layer, pressing and curing are carried out to form the electronic shelf label; and after the first epoxy resin glue sealing layer and the second epoxy resin glue sealing layer are cured, a complete potting colloid for isolating external water vapor is formed among the first PET film, the second PET film and the middle frame.
In one embodiment, the method of manufacturing an electronic shelf label may further include:
preparing a first PET film whole plate, a middle frame whole plate, a battery pack, a PCBA group, an electronic paper display screen group and a second PET film whole plate; wherein: the whole first PET film plate comprises a plurality of first PET films for preparing electronic shelf labels, the whole middle frame plate comprises a plurality of middle frames for preparing electronic shelf labels, the battery pack comprises a plurality of batteries for preparing electronic shelf labels, the PCBA group comprises a plurality of PCBAs for preparing electronic shelf labels, the electronic paper display screen group comprises a plurality of electronic paper display screens for preparing electronic shelf labels, and the whole second PET film plate comprises a plurality of second PET films for preparing electronic shelf labels; each first PET film is provided with a middle frame, a battery, PCBA, an electronic paper display screen and a second PET film which correspond to the positions of the first PET film;
operating each first PET film and the middle frame, the battery, the PCBA, the electronic paper display screen and the second PET film corresponding to the first PET film according to the method in the steps 101 to 104 to obtain an electronic shelf label whole plate;
and milling a plurality of single electronic shelf labels on the whole electronic shelf label plate through CNC (computer numerical control) of a numerical control machine.
When the electronic shelf label manufacturing method is specifically implemented, the electronic shelf label is manufactured on the whole plate through the obtained electronic shelf label, and then a plurality of single electronic shelf labels are milled through CNC (computer numerical control) machine tools, so that the electronic shelf labels are easy to realize automatic production, and the manufacturing efficiency of the electronic shelf labels is improved.
In order to facilitate understanding of how the present invention is implemented, a detailed description of the implementation of the present invention is provided below with reference to fig. 2 to 6.
Preparation of PET:
in one embodiment, the first and second PET film integral sheets 10 and 60 may be prepared as follows:
respectively finishing the screen printing treatment of the first PET film whole plate and the second PET film whole plate;
after the silk-screen printing is finished, carrying out positioning hole punching operation on the first PET film whole plate and carrying out positioning hole punching operation on the second PET film whole plate; the positioning hole is used for positioning during pressing treatment.
When the electronic shelf label is specifically implemented, the screen printing is respectively completed on the whole first PET film (PET rear film) plate and the whole second PET film (PET front film), and then the punching holes (positioning holes) are used for positioning during pressing, so that the quality and the manufacturing efficiency of the electronic shelf label are improved. The following steps also perform a positioning hole punching operation on the whole middle frame plate, wherein the positioning holes 21 on the whole middle frame plate correspond to the positioning holes on the whole first PET film plate and the whole second PET film plate.
2. Preparing a middle frame: in one embodiment, the middle frame plate may be prepared as follows:
each middle frame of the whole middle frame plate is provided with a glue overflowing half hole 22 for communicating the first accommodating space with the second accommodating space;
and arranging a glue overflow groove for accommodating the redundant epoxy resin glue in the pressing treatment process on the whole middle frame plate.
In specific implementation, according to the stacking shape of the whole machine, a PC plate is used for processing the whole middle frame (whole middle frame plate) by CNC, and the schematic diagram of the whole middle frame plate is shown in FIG. 4. The half-hole 22 of glue overflow in fig. 4 makes the epoxy resin glue flow between the PET front film and the PET back film, more be convenient for form complete encapsulating glue for isolating external steam, this encapsulating glue more fully coats the electrical component including the electronic paper display screen, fully isolates with external steam, further prolongs electronic shelf label's life. In addition, a transverse glue overflow groove 23 and a longitudinal glue overflow groove 24 are reserved on the whole middle frame plate, and redundant glue flows into the glue overflow grooves in the pressing process, so that the glue can fully fill the whole middle frame and gaps between the middle frame and the PET front and rear films.
In one embodiment, each middle frame of the whole middle frame plate is provided with a glue overflowing half hole for communicating the first accommodating space with the second accommodating space, and the glue overflowing half hole comprises: and the inner side edge of each middle frame of the whole middle frame plate is provided with a glue overflowing half hole for communicating the first accommodating space with the second accommodating space.
During specific implementation, as shown in fig. 4, the glue overflowing half hole is formed in the edge of the inner side of each middle frame, so that implementation is facilitated, and glue can flow between the PET front film and the PET rear film more conveniently. The number of the flash half holes can be more than one.
In one embodiment, the step of providing an overflow groove for accommodating excess epoxy resin glue during the pressing process on the middle frame whole plate comprises the following steps: the whole middle frame plate is provided with a transverse glue overflow groove and a longitudinal glue overflow groove for accommodating redundant epoxy resin glue in the pressing process; the transverse glue overflow groove is perpendicular to the pressing direction, and the longitudinal glue overflow groove is parallel to the pressing direction.
In specific implementation, as shown in fig. 4, the design of the transverse glue overflow groove and the longitudinal glue overflow groove is more convenient for accommodating the excess epoxy resin glue in the pressing process, so as to ensure the elegant appearance of the electronic shelf label. The transverse glue overflowing grooves can be multiple, can be arranged on the transverse edge of the whole middle frame plate, and can also be arranged between every two rows of middle frames. The longitudinal glue overflowing grooves can be multiple, can be arranged on the side edge of the whole middle frame plate, and can also be arranged between every two rows of middle frames.
3. Electrical component preparation, i.e. step 101 above:
in one embodiment, assembling the assembled printed circuit board PCBA and electronic paper display screen together may comprise: and pressing and assembling the PCBA and the electronic paper display screen together through the ACF.
When the electronic shelf label is specifically implemented, relevant components of the electronic shelf label are welded on a PCB to form PCBA, the PCBA and the electronic paper display screen are connected together in a compression joint mode through ACF, then a battery is welded, and the electric component is manufactured. Through ACF technology crimping connection PCBA and electronic paper display screen, guaranteed the fastness of electronic shelf label, further prolonged electronic shelf label's life.
PET pretreatment:
in one embodiment, the method for manufacturing an electronic shelf label may further include: a pretreatment operation for the first and second PET films.
When the method is specifically implemented, the PET film is cleaned by PET pretreatment, so that the combination of the PET, the glue and the middle frame is firmer.
5. Gluing, namely the step 102: the middle frame is placed on the first PET film, the middle frame and the first PET film form a first accommodating space (the first accommodating space can be a small gap and is not marked in figures 5 and 6), and epoxy resin glue is injected into the first accommodating space to form a first epoxy resin glue sealing layer. Specifically, the PET rear film and the middle frame are placed on a working platform in sequence, the two parts are positioned through positioning holes, and then epoxy resin glue is coated.
6. Electrical component assembly, i.e. step 103 above: and (3) putting the electrical assembly into the middle frame of the '5', namely, fixedly attaching one surface of the electrical assembly battery to the first epoxy resin glue sealing layer.
7. Gluing: that is, after the attachment is completed, the middle frame and one side of the electronic paper display screen of the electrical component form a second accommodating space (the second accommodating space may be a small gap, which is not marked in fig. 5 and 6).
During specific implementation, glue is continuously poured on the electrical component, then a PET front film is placed, namely a second PET film is placed on one surface, back to the electrical component, of the second epoxy resin glue sealing layer (a second PET film is placed on one surface, back to the electrical component, of the second epoxy resin glue sealing layer), and the front film is accurately aligned with the middle frame and the rear film through the same positioning columns.
8. Rolling: and rolling the front film after the front film is assembled in place, so that redundant glue and air bubbles enter a glue overflow groove designed in the middle frame.
9. Flat pressing: the rolled assembly is pressed flatly, the middle frame and the front and rear PET films are combined more tightly during the flat pressing, and the glue begins to solidify.
10. Laminating and curing: and (3) superposing and placing a plurality of flat-pressed product jointed boards (whole electronic shelf label boards), and completely curing at normal temperature.
By the above description of "8-10", in one embodiment, the pressing process may be performed as follows:
after the second PET film is put in place, rolling operation is carried out;
after the rolling operation, carrying out flat pressing operation;
after the flat pressing operation, a laminating operation is performed.
When the electronic shelf label is specifically implemented, the electronic shelf label provided by the pressing processing mode is high in quality and firm, and the service life is further prolonged.
11. Complete machine CNC: and after the glue is completely cured, milling each single electronic shelf label product in the assembly through CNC (computer numerical control), and finishing the preparation of the whole machine.
In summary, the technical solution provided in this embodiment provides the following method:
1. the method for realizing the electronic shelf label by adopting a normal-temperature pressing mode.
2. The method uses glue to isolate the screen from external environment water vapor, and improves the service life of the screen.
3. The middle frame design is provided with a middle glue overflow half hole and a transverse/longitudinal glue overflow groove.
4. A method for improving the structural strength of the whole electronic shelf label through encapsulation and lamination of epoxy resin glue.
Based on the same inventive concept, the embodiment of the present invention further provides an electronic shelf label, as described in the following embodiments. Because the principle of solving the problem of 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 repeated parts are not described again.
Fig. 5 is a schematic structural diagram of an electronic shelf label in an embodiment of the present invention, and as shown in fig. 5, the electronic shelf label includes:
a first PET film 1;
the middle frame 2 is placed on the first PET film and then forms a first containing space together with the first PET film, and epoxy resin glue is injected into the first containing space to form a first epoxy resin glue sealing layer;
one surface of a battery of the electrical assembly is fixedly attached to the first epoxy resin glue sealing layer, after the electrical assembly is attached, a second accommodating space is formed by the middle frame and one surface of the electronic paper display screen of the electrical assembly, and epoxy resin glue is injected into the second accommodating space to form a second epoxy resin glue sealing layer; wherein, electric assembly includes: PCBA4, electronic paper display screen 5 assembled with the PCBA, and battery 3 soldered to the PCBA;
the second PET film 6 is placed on one surface, back to the electric component, of the second epoxy resin glue sealing layer for pressing and curing; and after the first epoxy resin glue sealing layer and the second epoxy resin glue sealing layer are cured, a complete potting colloid for isolating external water vapor is formed among the first PET film, the second PET film and the middle frame.
In one embodiment, the electronic shelf label is milled from the whole electronic shelf label plate through CNC (computer numerical control) of a numerical control machine; the whole electronic shelf label plate comprises: a first PET film whole plate 10, a middle frame whole plate 20, a battery pack 30, a PCBA group 40, an electronic paper display screen group 50 and a second PET film whole plate 60; wherein: the first PET film whole plate comprises a plurality of first PET films, the middle frame whole plate comprises a plurality of middle frames, the battery pack comprises a plurality of batteries 3, the PCBA group comprises a plurality of PCBAs, the electronic paper display screen group comprises a plurality of electronic paper display screens, and the second PET film whole plate comprises a plurality of second PET films; each first PET film is provided with a middle frame, a battery, PCBA, an electronic paper display screen and a second PET film which correspond to the positions of the first PET film.
In one embodiment, the middle frame whole plate may include: and a plurality of positioning holes 21 for positioning during the press-fitting process.
In one embodiment, each middle frame of the whole middle frame plate is provided with a glue overflowing half hole 22 for communicating the first accommodating space and the second accommodating space.
In one embodiment, the flash half holes are disposed on the inside edge of each middle frame.
In one embodiment, the whole middle frame plate is provided with an adhesive overflow groove for accommodating excess epoxy resin glue in the pressing process.
In one embodiment, the glue overflow grooves comprise a transverse glue overflow groove 23 and a longitudinal glue overflow groove 24; the transverse glue overflow groove is perpendicular to the pressing direction, and the longitudinal glue overflow groove is parallel to the pressing direction.
The technical scheme provided by the embodiment of the invention has the beneficial technical effects that:
1. the electric assembly comprising the electronic paper display screen is fully coated by glue and fully isolated from external water vapor, and the service life of the screen is prolonged from 5 years to 10 years through the verification of an accelerated aging test.
2. The encapsulating glue epoxy resin is used for increasing the strength of the whole machine, the thin PET film is used for replacing thick protective lenses, the thickness of the whole machine is reduced by about 50% compared with that of the traditional design, and the whole experience is closer to the effect of paper price tags.
3. Full-automatic production can be realized, inconsistency caused by manual operation is avoided, and labor cost is reduced.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes may be made to the embodiment of the present invention by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (14)
1. A method of manufacturing an electronic shelf label, comprising:
assembling the assembled printed circuit board PCBA and the electronic paper display screen together, and welding the battery to the PCBA to form an electrical component;
placing the middle frame on a first poly terephthalic acid plastic PET film, forming a first accommodating space by the middle frame and the first PET film, and injecting epoxy resin glue into the first accommodating space to form a first epoxy resin glue sealing layer;
one surface of the electric component battery is fixedly attached to the first epoxy resin glue sealing layer, after the attachment is completed, a second accommodating space is formed by the middle frame and one surface of the electric component electronic paper display screen, and epoxy resin glue is injected into the second accommodating space to form a second epoxy resin glue sealing layer;
after a second PET film is placed on one surface, back to the electrical component, of the second epoxy resin glue sealing layer, pressing and curing are carried out to form the electronic shelf label; and after the first epoxy resin glue sealing layer and the second epoxy resin glue sealing layer are cured, a complete potting colloid for isolating external water vapor is formed among the first PET film, the second PET film and the middle frame.
2. The method of manufacturing an electronic shelf label as defined in claim 1, further comprising:
preparing a first PET film whole plate, a middle frame whole plate, a battery pack, a PCBA group, an electronic paper display screen group and a second PET film whole plate; wherein: the whole first PET film plate comprises a plurality of first PET films, the whole middle frame plate comprises a plurality of middle frames, the battery pack comprises a plurality of batteries, the PCBA group comprises a plurality of PCBAs, the electronic paper display screen group comprises a plurality of electronic paper display screens, and the whole second PET film plate comprises a plurality of second PET films; each first PET film is provided with a middle frame, a battery, PCBA, an electronic paper display screen and a second PET film which correspond to the positions of the first PET film;
the method of claim 1, operating each first PET film and the middle frame, the battery, the PCBA, the electronic paper display screen and the second PET film corresponding to the position of the first PET film to obtain an electronic shelf label whole plate;
and milling a plurality of single electronic shelf labels on the whole electronic shelf label plate through CNC (computer numerical control) of a numerical control machine.
3. The method of manufacturing an electronic shelf label as set forth in claim 2, wherein the first whole PET film sheet and the second whole PET film sheet are prepared as follows:
respectively finishing the screen printing treatment of the first PET film whole plate and the second PET film whole plate;
after the silk-screen printing treatment is finished, carrying out positioning hole punching operation on the first PET film whole plate and the second PET film whole plate; the positioning hole is used for positioning during pressing treatment.
4. The method for manufacturing an electronic shelf label as set forth in claim 2, wherein the middle frame plate is prepared as follows:
each middle frame of the whole middle frame plate is provided with a glue overflow half hole for communicating the first accommodating space and the second accommodating space;
and arranging a glue overflow groove for accommodating the redundant epoxy resin glue in the pressing treatment process on the whole middle frame plate.
5. The method for manufacturing an electronic shelf label according to claim 1, wherein the press-fitting treatment is performed as follows:
after the second PET film is put in place, rolling operation is carried out;
after the rolling operation, carrying out flat pressing operation;
after the flat pressing operation, a laminating operation is performed.
6. A method of manufacturing an electronic shelf label as defined in claim 1, wherein assembling the assembled printed circuit board PCBA and the electronic paper display screen together comprises: and pressing and assembling the PCBA and the electronic paper display screen together through the ACF.
7. The method of manufacturing an electronic shelf label as defined in claim 1, further comprising: a pretreatment operation for the first and second PET films.
8. An electronic shelf label, comprising:
a first PET film;
the middle frame is placed on the first PET film and then forms a first containing space together with the first PET film, and epoxy resin glue is injected into the first containing space to form a first epoxy resin glue sealing layer;
one surface of a battery of the electrical assembly is fixedly attached to the first epoxy resin glue sealing layer, after the electrical assembly is attached, a second accommodating space is formed by the middle frame and one surface of the electronic paper display screen of the electrical assembly, and epoxy resin glue is injected into the second accommodating space to form a second epoxy resin glue sealing layer; wherein, electric assembly includes: the electronic paper display screen comprises a PCBA, an electronic paper display screen assembled with the PCBA, and a battery welded to the PCBA;
the second PET film is placed on one surface, back to the electric component, of the second epoxy resin glue sealing layer for pressing and curing; and after the first epoxy resin glue sealing layer and the second epoxy resin glue sealing layer are cured, a complete potting colloid for isolating external water vapor is formed among the first PET film, the second PET film and the middle frame.
9. The electronic shelf label as defined in claim 8, wherein the electronic shelf label is CNC milled from a full sheet of electronic shelf labels; the whole electronic shelf label plate comprises: the electronic paper display screen comprises a first PET film whole plate, a middle frame whole plate, a battery pack, a PCBA group, an electronic paper display screen group and a second PET film whole plate; wherein: the whole first PET film plate comprises a plurality of first PET films, the whole middle frame plate comprises a plurality of middle frames, the battery pack comprises a plurality of batteries, the PCBA group comprises a plurality of PCBAs, the electronic paper display screen group comprises a plurality of electronic paper display screens, and the whole second PET film plate comprises a plurality of second PET films; each first PET film is provided with a middle frame, a battery, PCBA, an electronic paper display screen and a second PET film which correspond to the positions of the first PET film.
10. The electronic shelf label as defined in claim 9, wherein the middle frame full panel comprises: and the positioning holes are used for positioning during pressing treatment.
11. The electronic shelf label as defined in claim 9, wherein each of the middle frames of the whole middle frame plate is provided with a half hole for glue overflow for communicating the first receiving space and the second receiving space.
12. An electronic shelf label as defined in claim 11, wherein the flash half holes are provided on the inside edge of each middle frame.
13. The electronic shelf label as defined in claim 9, wherein the entire middle frame plate is provided with an overflow groove for receiving excess epoxy glue during the pressing process.
14. The electronic shelf label as defined in claim 13, wherein the glue-overflow slot comprises a transverse glue-overflow slot and a longitudinal glue-overflow slot; the transverse glue overflow groove is perpendicular to the pressing direction, and the longitudinal glue overflow groove is parallel to the pressing direction.
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| CN202010093544.2A CN113269290A (en) | 2020-02-14 | 2020-02-14 | Electronic shelf label and manufacturing method thereof |
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