CN109064928A - A kind of optical information color-changing anti-counterfeit device - Google Patents
A kind of optical information color-changing anti-counterfeit device Download PDFInfo
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- CN109064928A CN109064928A CN201811179739.8A CN201811179739A CN109064928A CN 109064928 A CN109064928 A CN 109064928A CN 201811179739 A CN201811179739 A CN 201811179739A CN 109064928 A CN109064928 A CN 109064928A
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- light
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- elastic
- optical information
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F13/00—Illuminated signs; Luminous advertising
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F13/00—Illuminated signs; Luminous advertising
- G09F13/20—Illuminated signs; Luminous advertising with luminescent surfaces or parts
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F3/00—Labels, tag tickets, or similar identification or indication means; Seals; Postage or like stamps
- G09F3/02—Forms or constructions
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F3/00—Labels, tag tickets, or similar identification or indication means; Seals; Postage or like stamps
- G09F3/02—Forms or constructions
- G09F3/0291—Labels or tickets undergoing a change under particular conditions, e.g. heat, radiation, passage of time
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- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Inspection Of Paper Currency And Valuable Securities (AREA)
Abstract
The invention discloses a kind of optical information color-changing anti-counterfeit devices, including guide lighting channel, one end of the guide lighting channel is connect with the optically focused block that light source inputs, the other end and the light transmission block of light source output connect, the guide lighting channel includes the first light-strip and the second light-strip and the prism being arranged between the first light-strip and the second light-strip, one end of first light-strip is connect with optically focused block, the other end is set to the side of prism, one end of second light-strip is connect with light transmission block, the other end is provided with the elastic light-strip for capturing light source, the elasticity light-strip is located at the other side of prism, and surrounding is coated with the black coating of one layer of extinction.Novel in design, structure of the invention is simple and convenient to operate, by accessing white light source in the side of optically focused block, light source shows seven kinds of different coloured light after passing through prism, it is connected using elastic light-strip from different coloured light, is radiated at the anti-counterfeiting mark code on light guide plate and shows different anti-fake colors on displaying block.
Description
Technical field
The present invention relates to optical information field of anti-counterfeit technology more particularly to a kind of optical information color-changing anti-counterfeit devices.
Background technique
Simple optical path checking security design can be widely applied to can only it is disposable, maintain secrecy or anti-fake
Whether field can identify the object true and false before use and have been used, once use, i.e. not resilient, and can refer to
The true and false situation that the state having been used can be used to product used in secondary-confirmation is shown.
Simple optical path checking security deisgn product can be widely used in drinks, and cosmetics, combination lock etc. is high-grade to be needed to prevent
Pseudo- product needs highly confidential occasion, and simple optical path checking security production is simple, examines simplicity, low in cost,
It is suitble to extensive application on a large scale, while can also be especially tailored, is applicable in Code in Hazardous Special Locations.
Prism is the transparent body that optically cross section is triangle.It is that the section that is made by transparent material is triangular in shape
Optical instrument, belong to one kind of dispersing prism, can make polychromatic light that dispersion occur when passing through prism, show it is red, orange,
Seven color colour bands of yellow, green, blue, indigo, purple.
Application No. is the patents of CN201210385240.9, disclose a kind of optical path pre-programmed method for anti-counterfeit, including light
Carrier and anti-fake operating procedure are handled, the light processing carrier includes light source input terminal, test lead, enables end, pre-programmed light
Line dissemination process device, light path changing device and display end；The anti-pseudo-operation the following steps are included: step 1. bright light source,
It obtains product standard and shows information and initiate mode；Step 2. triggers test pattern, display test information；Step 3. stops test
Mode, test information disappear；Step 4. triggers enabling mode, and product enables information and is shown as enabled；Step 5. triggering is surveyed
Die trial formula, test information show no longer complete；Step 6. extinguishes light source, and display end is no longer shown for information about.The test gimmick
Simply, the tool told truth from falsehood is available anywhere without customization, distinguishes that effect is intuitive, reliable, easily manufactured, has a wide range of application, and one
Secondary property uses, strong security, it is difficult to crack, it is difficult to replicate.
Nowadays, with the development of lamination techniques and nanotechnology, the development of mold production process and precision molding technology will
The above technology combines, and that realizes optical path checking security deisgn product has become simple possible, fakes, is counterfeit and crack skill
The raising of art makes many traditional anti-counterfeiting technologies become more and more unreliable, and marginal period waits for that more, confidentiality is stronger anti-fake
Technology occurs, and currently there are a variety of anti-counterfeiting technologies: as electronics IC encodes reading code anti-counterfeiting technology, laser antifalsification technology, machine
Tool beyond retrievable anti-counterfeiting technology etc., but all there is technological deficiency in the above technology, be easy to be cracked by person who is ambitious or tenacious of purpose, need often to update
It regenerates, after a period of time, the product before update cannot tell truth from falsehood very well, therefore terminal user can only ensure to prevent newly
Pseudo- design update can buy authentic genuine piece after regenerating in a short time, and operate trouble, only improves only counterfeit threshold, not
It is avoided that person who is ambitious or tenacious of purpose's is counterfeit.
Such as: there is internal information not would know that, can be compiled with counnter attack for electronics IC inside programming, code reader decryption identification technology
It is the advantages that journey, very difficult to crack, but this technology relies on special code reader, it is difficult to it popularizes, while can not avoid having opened
Used, the unspoiled part IC is recycled, while code reader needs stringent control to be obtained once being lost by counterfeiter,
Oneself carries out electronics IC inside programming, is read with genuine piece code reader, even if what reads, what is anti-fake, mixes the spurious with the genuine, it is difficult to know
Not, the use of IC inside programming technology can become the accomplice to fake instead at this time, and technological deficiency is obvious.
Another example is: mechanical beyond retrievable anti-counterfeiting technology, this technology is using the structure that complexity is easily ruined come anti-fake, operation letter
Singly, it is intuitively obvious that foreign object, effect are not depended on, once use, the structure that complexity is easily ruined i.e. beyond retrievable is damaged, not reproducible benefit
With antifalse effect is obvious, but because its complicated fragile structures used is single entities construction, in the development of nondestructive testing technique
Under, pure mechanic structure is easy to become visible under X-ray irradiation and CT imaging, exposes true features, is not avoided that counterfeiter
It is forged from the source of packaging, technological deficiency is obvious.
Summary of the invention
It is an object of the invention to overcome problem above of the existing technology, a kind of optical information color-changing anti-counterfeit dress is provided
It sets, the present invention is novel in design, structure is simple and convenient to operate, and by accessing white light source in the side of optically focused block, light source passes through three
Seven kinds of different coloured light are showed after prism, are connected using elastic light-strip from different coloured light, are made the anti-counterfeiting label on light guide plate
Knowledge code, which is radiated at, shows different anti-fake colors on displaying block.
To realize above-mentioned technical purpose and the technique effect, the invention is realized by the following technical scheme:
A kind of optical information color-changing anti-counterfeit device, including guide lighting channel, the optically focused block of one end of the guide lighting channel and light source input
The light transmission block of connection, the other end and light source output connects, the guide lighting channel include the first light-strip and the second light-strip and
Prism between first light-strip and the second light-strip is set, and one end of first light-strip is connect with optically focused block, separately
One end is set to the side of prism, and one end of second light-strip is connect with light transmission block, and the other end is provided with capture light source
Elastic light-strip, the elasticity light-strip is located at the other side of prism, and surrounding is coated with the black coating of one layer of extinction.
Preferably, being additionally provided with light source projects plate, the light source projects plate between the prism and elastic light-strip
On be provided with multiple positioning and guiding platforms for connecting elastic light-strips, the positioning and guiding platform is set between different color light.Using
This technical solution, white light source form red, orange, yellow, green, blue, indigo, purple seven kinds of coloured light after prism；Light source projects plate is used
In the light source projects of prism, seven kinds of coloured light projection after formation is shown above；Positioning and guiding platform is set to different color light
Between, it not only can isolate the color between different color light, but also the different color light for facilitating elastic light-strip and projection connects,
For transmitting the coloured light of different colours.
Preferably, being provided with shell on the outside of the guide lighting channel, the shell, which is located at the top of elastic light-strip, to be set
It is equipped with by impression.It adopts this technical solution, the operation for facilitating user by impression of setting.
Preferably, the shell is internally provided with avoid holes, the elastic light-strip of connection is provided in the avoid holes
Elasticity reset device.It adopts this technical solution, so that the elastic light-strip after pressing, under the action of no external force, by compressing
Elasticity reset device reset.
Preferably, the elasticity reset device includes spring or elastic slice or elastic resin or elastic rubber or is enclosed with bullet
The foam-rubber cushion of spring or elastic slice.
Preferably, the light transmission block far from the side of the second light-strip be provided with pre-programmed light transmission device and with
The light path changing device and displaying block of pre-programmed light transmission device connection.
Preferably, the pre-programmed light transmission device includes connecting the light guide plate of light transmission block and being arranged in light guide plate
On can be with the anti-counterfeiting mark code of the preediting of light transmission.It adopts this technical solution, anti-counterfeiting mark code may be configured as two dimensional code and product
Board, date of manufacture, beginning of production etc..
Preferably, the light path changing device includes the light shielding block for connecting light guide plate and driving light shielding block in light guide plate
The disposable enabling of upper movement switchs.It adopts this technical solution, mobile light shielding block is switched using disposable enable, after making movement
Light shielding block can not restore.
Preferably, the displaying block is set as the glass or acrylic of transparent scratch, the glass or acrylic
There is the fluorescent powder of one layer of light transmission positioned at the side painting figure of pre-programmed light transmission device.
Preferably, the optically focused block, light transmission block and prism are made of transparent glass or pressure gram material；It is described
First light-strip, the second light-strip and elastic light-strip use, and there is transparent elastic material to be made；The transparent elastic material
Material includes PVC or TPE plastics.It adopts this technical solution, facilitates the propagation of light source.
The beneficial effects of the present invention are:
1. novel in design, structure is simple and convenient to operate, by accessing white light source in the side of optically focused block, light source passes through trigone
Seven kinds of different coloured light are showed after mirror, are connected using elastic light-strip from different coloured light, are made the anti-counterfeiting mark on light guide plate
Code, which is radiated at, shows different anti-fake colors on displaying block；
2. present invention test gimmick is simple, the tool told truth from falsehood is available anywhere without customization, distinguishes that effect is intuitive, reliable, system
It makes conveniently, has a wide range of application, disposable, strong security, it is difficult to crack, it is difficult to replicate；
3. the irreversibility that the present invention possesses mechanical beyond retrievable anti-counterfeiting technology；
4. the present invention can be to avoid the mixing the spurious with the genuine property of laser antifalsification technology.
The above description is only an overview of the technical scheme of the present invention, in order to better understand the technical means of the present invention,
And can be implemented in accordance with the contents of the specification, with presently preferred embodiments of the present invention and attached drawing is cooperated to be described in detail below.This hair
Bright specific embodiment is shown in detail by following embodiment and its attached drawing.
Detailed description of the invention
The drawings described herein are used to provide a further understanding of the present invention, constitutes part of this application, this hair
Bright illustrative embodiments and their description are used to explain the present invention, and are not constituted improper limitations of the present invention.In the accompanying drawings:
Fig. 1 is structural schematic diagram of the present invention；
Fig. 2 is pressing structure schematic diagram of the present invention；
Fig. 3 is the partial schematic diagram that positioning and guiding platform of the present invention is connect with elastic guide-lighting block；
Fig. 4 is the schematic diagram of the present invention shown by guide lighting channel in displaying block using front light-source；
Fig. 5 is the schematic diagram of the present invention shown by guide lighting channel in displaying block using rear light source；
Fig. 6 be it is of the present invention using front light-source not by the display schematic diagram of guide lighting channel；
Fig. 7 is the display schematic diagram of the present invention for passing through guide lighting channel using front light-source；
Fig. 8 be it is of the present invention using rear light source not by the display schematic diagram of guide lighting channel；
Fig. 9 is the display schematic diagram of the present invention for passing through guide lighting channel using rear light source.
Figure label explanation: 1, optically focused block, 2, light transmission block, the 3, first guide-lighting block, the 4, second guide-lighting block, 5, prism, 6,
Elastic light-strip, 7, black coating, 8, light source projects plate, 9, positioning and guiding platform, 10, shell, 11, press impression, 12, avoid holes,
13, elasticity reset device, 14, displaying block, 15, light guide plate, 16, anti-counterfeiting mark code, 17, light shielding block, 18, disposable enable open
It closes, 19, coloured light.
Specific embodiment
The invention will be further described with reference to the accompanying drawing:
Shown in referring to Fig.1~Fig. 9, a kind of optical information color-changing anti-counterfeit device, including guide lighting channel, one end of the guide lighting channel with
The optically focused block 1 of light source input connects, and the light transmission block 2 of the other end and light source output connects, and the guide lighting channel includes first guide-lighting
Item 3 and the second light-strip 4 and the prism 5 being arranged between the first light-strip 3 and the second light-strip 4, described first is guide-lighting
One end of item 3 is connect with optically focused block 1, and the other end is set to the side of prism 5, one end of second light-strip 4 and light transmission
Block 2 connects, and the other end is provided with the elastic light-strip 6 for capturing light source, and the elasticity light-strip 6 is located at the other side of prism 5,
And surrounding is coated with the black coating 7 of one layer of extinction.
Preferably, being additionally provided with light source projects plate 8, the light source projects between the prism 5 and elastic light-strip 6
Be provided with multiple positioning and guiding platforms 9 for connecting elastic light-strips 6 on plate 8, the positioning and guiding platform 9 be set to different color light it
Between.It adopts this technical solution, white light source forms red, orange, yellow, green, blue, indigo, purple seven kinds of coloured light after prism 5；Light source
The light source projects that plate 8 is used for prism 5 are projected, seven kinds of coloured light projection after formation is shown above；Positioning and guiding platform 9 is arranged
Between different color light, the color between different color light not only can isolate, but also facilitate elastic light-strip 6 and project not
Homochromy light connects, for transmitting the coloured light of different colours.
Preferably, being provided with shell 10 on the outside of the guide lighting channel, the shell 10 is located at the top of elastic light-strip 6
Portion is provided with by impression 11.It adopts this technical solution, the operation for facilitating user by impression 11 of setting.
Preferably, the shell 10 is internally provided with avoid holes 12, connection elasticity is provided in the avoid holes 12
The elasticity reset device 13 of light-strip 6.It adopts this technical solution, so that the elastic light-strip 6 after pressing, in the effect of no external force
Under, it is resetted by the elasticity reset device 13 compressed.
Preferably, the elasticity reset device 13 includes spring or elastic slice or elastic resin or elastic rubber or is enclosed with
The foam-rubber cushion of spring or elastic slice.
Preferably, the light transmission block 2 far from the side of the second light-strip 4 be provided with pre-programmed light transmission device and
The light path changing device and displaying block 14 being connect with pre-programmed light transmission device.
Preferably, the pre-programmed light transmission device includes that the light guide plate 15 for connecting light transmission block 2 and setting are being led
It can be with the anti-counterfeiting mark code 16 of the preediting of light transmission on tabula rasa 15.It adopts this technical solution, anti-counterfeiting mark code 16 may be configured as two
Tie up code and brand, date of manufacture, beginning of production etc..
Preferably, the light path changing device includes that the light shielding block 17 for connecting light guide plate 15 and driving light shielding block 17 exist
The disposable enabling switch 18 moved on light guide plate 15.It adopts this technical solution, enables the mobile shading of switch 18 using disposable
Block 17, the light shielding block 17 after making movement can not restore.
Preferably, the displaying block 14 is set as the glass or acrylic of transparent scratch, the glass or Asia gram
The side painting figure that power is located at pre-programmed light transmission device has the fluorescent powder of one layer of light transmission.
Preferably, the optically focused block 1, light transmission block 2 and prism 5 are made of transparent glass or pressure gram material；
First light-strip 3, the second light-strip 4 and elastic light-strip 6 are made of with transparent elastic material；It is described transparent
Elastic material includes PVC or TPE plastics.It adopts this technical solution, facilitates the propagation of light source.
Specific embodiment:
After lighting white light source, light source is radiated on prism by the first light-strip connected, is refracted to light by prism
Red, orange, yellow, green, blue, indigo, purple seven kinds of coloured light are formed on source projection plate.As shown in Fig. 1, Fig. 6, under using preceding normal state,
For elastic light-strip far from seven kinds of coloured light on light source projects plate, displaying block part can not show any information and prompt；Such as figure
2, it shown in Fig. 4, Fig. 7, in the case where pressing elastic light-strip, connects elastic light-strip from different anti-fake coloured light, shows block portion
Divide the information such as not enabled, brand name, two dimensional code, date of manufacture, place and the class of display different preventing puppet coloured light, makes user logical
The information contents such as the coloured light of display are crossed to analyze result.As shown in Fig. 1, Fig. 8, after use under normal state, elastic light-strip
Far from seven kinds of coloured light on light source projects plate, displaying block part can not show any information and prompt；Such as Fig. 2, Fig. 5, Fig. 8 institute
Show, in the case where pressing elastic light-strip, connects elastic light-strip from different anti-fake coloured light, displaying block part shows different preventing
The information such as enabling, brand name, two dimensional code, date of manufacture, place and the class of pseudo- coloured light.It has been opened although representing in this way
Envelope, but this is genuine piece.It effectively conveyed the current information of article, anti-fake value with higher.
The above description is merely a specific embodiment, but scope of protection of the present invention is not limited thereto, any
Those familiar with the art in the technical scope disclosed by the present invention, can easily think of the change or the replacement, and should all contain
Lid is within protection scope of the present invention.Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. a kind of optical information color-changing anti-counterfeit device, including guide lighting channel, it is characterised in that: one end of the guide lighting channel and light source
The optically focused block (1) of input connects, and the light transmission block (2) of the other end and light source output connects, and the guide lighting channel includes first guide-lighting
Item (3) and the second light-strip (4) and the prism (5) being arranged between the first light-strip (3) and the second light-strip (4), institute
The one end for stating the first light-strip (3) is connect with optically focused block (1), and the other end is set to the side of prism (5), and described second is guide-lighting
One end of item (4) is connect with light transmission block (2), and the other end is provided with the elastic light-strip (6) for capturing light source, the elasticity light-strip
(6) it is located at the other side of prism (5), and surrounding is coated with the black coating (7) of one layer of extinction.
2. a kind of optical information color-changing anti-counterfeit device according to claim 1, it is characterised in that: the prism (5) and bullet
Light source projects plate (8) are additionally provided between property light-strip (6), are provided with multiple connection elastic conductings on the light source projects plate (8)
The positioning and guiding platform (9) of striation (6), the positioning and guiding platform (9) are set between different color light.
3. a kind of optical information color-changing anti-counterfeit device according to claim 1, it is characterised in that: the outside of the guide lighting channel
It is provided with shell (10), the shell (10), which is located at the top of elastic light-strip (6), to be provided with by impression (11).
4. a kind of optical information color-changing anti-counterfeit device according to claim 3, it is characterised in that: the inside of the shell (10)
It is provided with avoid holes (12), the elasticity reset device (13) for connecting elastic light-strip (6) is provided in the avoid holes (12).
5. a kind of optical information color-changing anti-counterfeit device according to claim 4, it is characterised in that: the elasticity reset device
It (13) include spring or elastic slice or elastic resin or elastic rubber or the foam-rubber cushion for being enclosed with spring or elastic slice.
6. a kind of optical information color-changing anti-counterfeit device according to claim 1, it is characterised in that: the light transmission block (2) is separate
The optical path that the side of second light-strip (4) is provided with pre-programmed light transmission device and connect with pre-programmed light transmission device
Change device and displaying block (14).
7. a kind of optical information color-changing anti-counterfeit device according to claim 6, it is characterised in that: the pre-programmed light is propagated
Device includes the light guide plate (15) of connection light transmission block (2) and setting can be with the anti-fake of the preediting of light transmission on light guide plate (15)
Identification code (16).
8. a kind of optical information color-changing anti-counterfeit device according to claim 6, it is characterised in that: the light path changing device packet
The disposable enabling that the light shielding block (17) and driving light shielding block (17) for including connection light guide plate (15) move on light guide plate (15)
It switchs (18).
9. a kind of optical information color-changing anti-counterfeit device according to claim 6, it is characterised in that: displaying block (14) setting
For the glass or acrylic of transparent scratch, the side that the glass or acrylic are located at pre-programmed light transmission device applies figure
There is the fluorescent powder of one layer of light transmission.
10. a kind of optical information color-changing anti-counterfeit device according to claim 1, it is characterised in that: the optically focused block (1), thoroughly
Light block (2) and prism (5) are made of transparent glass or pressure gram material；First light-strip (3), the second light-strip
(4) it is made with elastic light-strip (6) of with transparent elastic material；The transparent elastic material includes PVC or TPE modeling
Material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811179739.8A CN109064928B (en) | 2018-10-10 | 2018-10-10 | Optical information color-changing anti-counterfeiting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811179739.8A CN109064928B (en) | 2018-10-10 | 2018-10-10 | Optical information color-changing anti-counterfeiting device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109064928A true CN109064928A (en) | 2018-12-21 |
| CN109064928B CN109064928B (en) | 2021-03-16 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811179739.8A Active CN109064928B (en) | 2018-10-10 | 2018-10-10 | Optical information color-changing anti-counterfeiting device |
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| Country | Link |
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| CN102999845A (en) * | 2012-10-12 | 2013-03-27 | 苏州征之魂专利技术服务有限公司 | Light path pre-programmed anti-counterfeiting method |
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| CN107480757A (en) * | 2017-08-24 | 2017-12-15 | 深圳市光域物联科技有限公司 | Light antifalsification label, system and verification method |
| CN207116282U (en) * | 2017-06-28 | 2018-03-16 | 微鲸科技有限公司 | Light guide key device and electronic equipment |
| CN209149743U (en) * | 2018-10-10 | 2019-07-23 | 苏州征之魂专利技术服务有限公司 | A kind of optical information color-changing anti-counterfeit device |
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2018
- 2018-10-10 CN CN201811179739.8A patent/CN109064928B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| ATE314716T1 (en) * | 1999-06-23 | 2006-01-15 | Tripseal Ltd | ELECTRONIC SEAL, METHOD AND SECURITY SYSTEM |
| US6394022B1 (en) * | 2000-08-25 | 2002-05-28 | The Regents Of The University Of California | Triboluminescent tamper-indicating device |
| CN102999845A (en) * | 2012-10-12 | 2013-03-27 | 苏州征之魂专利技术服务有限公司 | Light path pre-programmed anti-counterfeiting method |
| CN105206176A (en) * | 2015-10-30 | 2015-12-30 | 合肥华凌股份有限公司 | Color-changing tag system and method as well as refrigerator adopting color-changing tag system |
| CN207116282U (en) * | 2017-06-28 | 2018-03-16 | 微鲸科技有限公司 | Light guide key device and electronic equipment |
| CN107480757A (en) * | 2017-08-24 | 2017-12-15 | 深圳市光域物联科技有限公司 | Light antifalsification label, system and verification method |
| CN209149743U (en) * | 2018-10-10 | 2019-07-23 | 苏州征之魂专利技术服务有限公司 | A kind of optical information color-changing anti-counterfeit device |
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| Publication number | Publication date |
|---|---|
| CN109064928B (en) | 2021-03-16 |
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