EP4093616A1 - Darstellungselement für lichtfleckenbild - Google Patents
Darstellungselement für lichtfleckenbildInfo
- Publication number
- EP4093616A1 EP4093616A1 EP21702159.1A EP21702159A EP4093616A1 EP 4093616 A1 EP4093616 A1 EP 4093616A1 EP 21702159 A EP21702159 A EP 21702159A EP 4093616 A1 EP4093616 A1 EP 4093616A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- display element
- optical elements
- fresnel
- light spot
- light
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
- B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
- B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
- B42D25/30—Identification or security features, e.g. for preventing forgery
- B42D25/324—Reliefs
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
- B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
- B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
- B42D25/20—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof characterised by a particular use or purpose
- B42D25/29—Securities; Bank notes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
- B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
- B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
- B42D25/30—Identification or security features, e.g. for preventing forgery
- B42D25/36—Identification or security features, e.g. for preventing forgery comprising special materials
- B42D25/373—Metallic materials
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
- B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
- B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
- B42D25/40—Manufacture
- B42D25/405—Marking
- B42D25/425—Marking by deformation, e.g. embossing
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B3/00—Simple or compound lenses
- G02B3/02—Simple or compound lenses with non-spherical faces
- G02B3/08—Simple or compound lenses with non-spherical faces with discontinuous faces, e.g. Fresnel lens
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B30/00—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images
- G02B30/20—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images by providing first and second parallax images to an observer's left and right eyes
- G02B30/26—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images by providing first and second parallax images to an observer's left and right eyes of the autostereoscopic type
- G02B30/27—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images by providing first and second parallax images to an observer's left and right eyes of the autostereoscopic type involving lenticular arrays
Definitions
- the invention relates to a display element for generating a light spot image from a plurality of light spots.
- the invention also relates to a method for producing such a display element and a data carrier with such a display element.
- Data carriers such as value or identity documents, but also other objects of value such as branded items, are often provided with security elements for protection that allow the authenticity of the data carrier to be checked and at the same time serve as protection against unauthorized reproduction.
- the invention is based on the object of further increasing the security against forgery and the visual attractiveness of a display element for a light spot image.
- the invention provides a display element with a substrate with a surface area in which a plurality of optical elements inclined towards the surface area are arranged.
- the display element is designed and intended, when illuminated with a calibration source, to generate a calibration spot image from a plurality of light spots which are real or virtual images of the illuminating calibration source.
- the light spots appear to be floating above or below the surface area to a viewer, and with a continuous change in their apparent floating height they follow a predetermined surface topography projecting and / or receding over the surface area.
- Each light spot of the light spot image is assigned a plurality of optical elements which are refractive and / or reflective optical elements which together form a Fresnel structure.
- the optical elements of a Fresnel structure work together when the display element is illuminated in order to generate the light spot assigned to them.
- the inclinations of the optical elements of the Fresnel structures are matched to one another in such a way that they continuously change the focal lengths of the Fresnel structures and thereby make the light spots appear to follow the predetermined surface topography for an observer.
- the optical elements are refractive optical elements for at least some of the Fresnel structures, which together form a Fresnel lens.
- Each Fresnel lens can be a uniform Have focal length, or their focal length can be continuously modified in order to take into account the given surface topography.
- the optical elements are reflective optical elements for at least some of the Fresnel structures, which together form a Fresnel mirror, in particular a Fresnel concave mirror or a Fresnel curved mirror.
- Each Fresnel mirror can have a uniform focal length, or its focal length can be continuously modified in order to take account of the given surface topography.
- the Fresnel structures in the areas of the surface topography that protrude and / or recede in relation to the surface area are preferably neither rotationally symmetrical nor elliptical, but rather follow a free form predetermined by the surface topography.
- optical elements are formed with particular advantage by flat microspie gel or by small microprisms. However, it is also advantageously possible for the optical elements to have curved surfaces and, for example, to represent the curved steps of a Fresnel step lens or a Fresnel step mirror.
- the optical elements and the floating heights of the spruce spots are designed so that the condition f / d ⁇ 5 applies to the spruce spots and the associated optical elements, where f denotes the amount of floating height of a spruce spot above or below the surface area and d indicates the optical diameter of the optical elements contributing to this spruce spot.
- f denotes the amount of floating height of a spruce spot above or below the surface area
- d indicates the optical diameter of the optical elements contributing to this spruce spot.
- a plurality of mutually adjacent optical elements is assigned to each light spot of the light spot image.
- each light spot of the light spot image is associating a plurality of spaced apart on the FLAE chen Scheme distributed optical elements.
- several groups of optical elements which are each assigned to different light spots, can be arranged nested in one another in the same surface area. In this way, a particularly high spatial resolution can be achieved in the light spot image, as explained in more detail below.
- nesting all types of symbols that consist of more than one image point can also be generated with light spots.
- light spot patterns are formed by a plurality of light spots which seem to follow the predetermined surface topography for a viewer.
- the light spot patterns can in particular be formed from a grid of pxq light spot positions, p and q preferably assuming one of the values 2, 3, 4, 5 or 6 independently of one another. By occupying part of the pxq light spot positions with light spots and part remaining unoccupied, the desired dot matrix patterns can be generated.
- the light spot patterns represent partly letters, numbers, logos, symbols or simple geometric shapes such as circles, ovals, triangles, rectangles or squares.
- the light spot pattern can, for example, the value of the banknote, such as the number "10" and / or a currency symbol bol, for example " €".
- the predetermined surface topography advantageously represents a curved surface and is preferably a spherical segment that bulges out of the surface area or into the surface area, in particular a hemisphere.
- the optical elements are designed as embossed structures in an embossed lacquer layer.
- the embossed structures are preferably provided with a reflection-increasing coating.
- a full-surface or screened metallization, a high-index coating, a thin-layer element with a color shift effect or a cholesteric liquid crystal layer are particularly suitable as a reflection-increasing coating.
- the structure heights of the embossed structures are preferably below 100 gm, preferably below 20 gm, particularly preferably below 5 gm.
- the display element is advantageously a security element for security papers, documents of value and other objects to be secured, in particular a security thread, a security tape, a security strip, a label or a transfer element.
- the display elements according to the invention can be combined with other security features, for example with diffractive structures, with hologram structures in all variants, metalized or non-metalized, with sub-wavelength structures, metalized or non-metalized, with sub-wavelength gratings, with layer systems that show a color change when tilted, semitransparent or opaque, with diffractive optical elements, with refractive optical elements such as prism beam shapers, with special hole shapes, with safety features with specifically set electrical conductivity, with incorporated substances with magnetic coding, with substances with phosphorescent, fluorescent or luminescent effects, paint with security features based on liquid crystals, with matt structures, with additional micromirror elements, with elements with a blind effect or with sawtooth structures.
- the display elements according to the invention are particularly advantageously combined with a background that completely surrounds them, in particular with a radial background, as can be generated by the designs described in the document DE 102010055688 A1.
- the display elements according to the invention can advantageously also have static pattern elements that are formed, for example, by a mirror surface or a micromirror arrangement with noisy micromirrors of the type described in WO 2011/066991 A2.
- the disclosure of the two cited publications is included in the present application.
- the invention also includes a method for producing a display element of the type described above, which is designed and intended to produce a light spot image from a plurality of light spots when illuminated which are real or virtual images of the illuminating light source and which appear to be floating above or below the surface area to a viewer, with a continuous change in their apparent floating height following a predetermined surface topography that protrudes and / or recedes from the surface area.
- a substrate is provided and a plurality of optical elements inclined with respect to the surface area are arranged in a surface area of the substrate.
- Each light spot of the light spot image is assigned a plurality of optical elements which are refractive and / or reflective optical elements which together form a Fresnel structure.
- the optical elements of a Fresnel structure work together when the display element is illuminated in order to generate the light spot assigned to them.
- the inclinations of the optical elements of the Fresnel structures are matched to one another in such a way that they continuously change the focal lengths of the Fresnel structures and thus make the light spots appear to follow the given surface topography for an observer.
- the desired, perceptible surface topography is specified by a vector-valued function f (x, y), the gradients (dxo, dyo) of unmodified optical elements are determined, which lead to uniform, in particular rotationally symmetrical or elliptical Fresnel structures, and the modified, coordinated gradients (dx, dy) of the optical elements are determined.
- the display element is then generated with the modified gradients of the optical elements.
- the invention further includes a data carrier with a display element of the type described, the display element being arranged in particular as a reflective security element in an opaque area of the data carrier, or as an at least partially transparent security element in or above a transparent window area or a continuous opening in the data carrier can.
- the data carrier can in particular be a value document, such as a bank note, in particular a paper bank note, a polymer bank note or a film composite bank note, but also an identification card, such as a credit card, a bank card, a cash card, an authorization card, a Trade ID card or a passport personalization page.
- FIG. 1 shows a schematic representation of a bank note with a security element according to the invention
- FIG. 2 schematically shows a cross-section of a display element according to the invention to explain its basic mode of operation
- FIG. 3 shows a plan view of the surface area of the display element of FIG. 2 when illuminated with a spruce source which produces extensive spruce spots
- Fig. 5 in (a) to (c) each shows the spruce stain image belonging to the surface areas of Figs. 4 (a) to (c),
- FIG. 6 schematically shows an enlarged view of a section VI from FIG. 4 (a) with four Fresnel concave mirrors
- FIG. 7 is a schematic plan view of a section of an inventive display element with two nested Fresnel concave mirrors
- FIG. 8 shows a schematic side view of the detail from FIG. 7, and
- FIG. 7 is a schematic plan view of a section of an inventive display element with two nested Fresnel concave mirrors
- FIG. 9 shows a plan view of the surface area of a display element according to the invention which, when illuminated, shows light spot patterns in the form of the letter sequence "EU".
- FIG. 1 shows a schematic representation of a bank note 10 which is provided with a security element 12 according to the invention.
- the security element 12 shows a multitude of light spots 16 when illuminated, which seem to float above or below the plane of the security element 12 for a viewer and which, when the security element 12 moves, the curved surface of a hemisphere bulging out of the plane in the middle of the security element 14 seem to follow.
- the display element 20 has a substrate 22 with a surface area 24, in which a plurality of micromirrors 26 inclined with respect to the surface area 24 is arranged.
- the display element 20 or the multitude of micromirrors 26 of the display element When illuminated with parallel light, for example a light source 30 ideally far away, the display element 20 or the multitude of micromirrors 26 of the display element generates a light spot image a plurality of light spots 32a, 32b.
- the light spots represent real or virtual images of the illuminating light source 30.
- the light spots appear floating above (light spots 32b) or below (light spots 32a) of the surface area 24, the amount of the floating height being denoted below by f referred to as.
- the light spots 32a are identical to the light spots 32a,
- Each light spot 32a, 32b of the light spot image is assigned a plurality of micro mirrors 26 in the surface area 24, which in the concerningsbei game of FIG. 2 together each form a Fresnel curved mirror 28.
- the micromirrors 26 of each Fresnel mirror 28 interact in order to generate the respective light spot 32a or 32b assigned to them.
- two Fresnel mirrors 28, each formed from a plurality of micromirrors 26, and correspondingly two light spots 32a, 32b of the light spot image are shown.
- FIG. 3 shows a plan view of the surface area 24 of the display element 20 when illuminated with a broad light source 30 which generates extensive light spots 32. While the light spots 32 seem to float in an outer area 52 at a constant height below the surface area, the apparent floating height of the light spots 32 in the central area of the element continuously follows the surface profile of a hemisphere 50 protruding over the surface area Apparent floating height in the plan view of FIG. 3 through the two-dimensional Projek tion in the plane of the paper is not visible, the topography of the protruding hemisphere 50 is nevertheless already clearly recognizable by the distortion of the light spots 32.
- This special effect is generated by a continuous modification of the focal length of the Fresnel mirror 28 over the surface of the display element 20 according to a mathematical function that describes the desired, projecting and / or recessed surface topography.
- the inclination of the micromirrors 26 relative to the surface area 24 can be described by the inclination of the micromirrors in the x and y directions, with the unmodified inclines of the micromirrors at the location (x, y) also given by uniform, for example rotationally symmetrical Fresnel structures (dxo, dyo).
- the design of such micro mirrors and the determination of the slopes (dxo, dyo) can be found in the publication WO 2012/048847 A1, in particular the description on pages 31 and 32, for example.
- the disclosure of the publication WO 2012/048847 A1 is included in the present application.
- the desired, perceptible surface topography can be described by a vector-valued function f (x, y), which can only differ from zero in certain areas, so that the modification only affects a sub-area of the display element 20.
- ⁇ 1, f (x, y) (0,0) if
- the display element itself can extend, for example, in the range of -1 ⁇ x ⁇ 3 and -1 ⁇ y ⁇ 3.
- the radius R of the hemisphere can also assume other values that are given by the desired design and appearance.
- a parameter c 1 By multiplying the function f (x, y) shown above by a parameter c 1, it is also possible to generate flattened or more strongly curved ellipsoidal surfaces.
- other distortions can also be generated, for example concave or convex distortions, such as the "barrel distortion” known from photography, which in extreme forms leads to a fish-eye effect.
- This modification of the gradients produces a distortion of the light spots 32 in such a form that the modified surface area 50 is perceived by the observer 40 as a three-dimensional hemisphere bulging out of the surface area 24.
- the individual light spots 32 and their spacing are namely greatly enlarged by the modified micromirrors at the equator of the hemisphere, on the other hand they are compressed towards the poles.
- the modification of the mirror slopes not only produces a change in the effective focal length of the Fresnel mirror 28, but also distorts the entire structure.
- the modification of the mirror slopes in a real representation element generates not only the distortion but also a dynamic effect that appears when the element is tilted horizontally as well as vertically.
- the light spots 32 move namely in the modified area 50 for a viewer when tilting the display element 20 slower and generally on curved paths.
- FIG. 3 further shows that the individual Fresnel structures in the modified area 50 are larger and therefore allow the light spots 32 a larger range of movement when tilted.
- the light spots 32 move more slowly in this larger area than the light spots in the unmodified areas 52. This effect is most pronounced at the poles of the hemisphere, where the mirror slopes are due to the modification changed the most.
- These different speeds of movement of the light spots 32 within the modified area 50 give the viewer the illusion that the light spots 32 are actually moving on the protruding surface of a three-dimensional hemisphere, i.e. at the north pole the light spots move slowly towards the viewer , they run faster over the equator and at the South Pole they move more slowly and away from the viewer.
- FIG. 4 shows in (a) to (c) the surface area 24 of a display element according to the invention with a row of Fresnel hollow mirrors 28, which, as described above, are each formed from a plurality of micromirrors.
- FIG. 4 (a) shows an undistorted Fresnel mirror structure
- FIG. 4 (b) shows a Fresnel mirror structure with low distortion
- FIG. 4 (c) shows a Fresnel mirror structure with strong distortion.
- Fig. 6 is a ver enlarged view of a section VI of Fig. 4 (a) with four Fresnelhohlspie rules 28 shown schematically.
- FIG. 6 is a ver enlarged view of a section VI of Fig. 4 (a) with four Fresnelhohlspie rules 28 shown schematically.
- FIG. 5 shows in (a) to (c) the light spot image of light spots 32 belonging to the surface areas 24 of FIGS. 4 (a) to (c).
- the three-dimensional image impression that is to say the perception of the viewer 40 that the light spots 32 appear to float above or below the surface area 24 of the substrate 22 at a certain height f, is produced by seeing with both eyes. If a light spot 32 is to be visible to both eyes as seen from the observer 40, the condition f / d must be met with a typical eye distance of a «6.5 cm (FIG. 2) and a typical viewing distance b « 30 cm (FIG. 2) ⁇ 5 must be fulfilled, where f denotes the amount of floating height of the light spot 32 and d denotes the optics diameter of the Fresnel mirror 28 generating the light spot 32, i.e.
- the micromirrors 26, which together form a Fresnel mirror 28 are arranged directly next to one another without any space, so that the optical diameter d is simply the sum of the dimensions of the micromirrors 26 forming the Fresnel mirror.
- the distance between two adjacent light spots 32 in the plane of the surface area then essentially corresponds to the linear dimension of the Fresnel mirror 28.
- more complex light spot patterns are formed from small light spots lying close to one another, which when the display element is tilted migrate together over the projecting and / or recessed surface topography.
- the micromirrors 26 assigned to the Fresnel mirrors 28 are nested in one another in the surface area 24.
- the principle is explained in more detail with reference to FIGS. 7 and 8, in which two closely spaced light spots 72, 74 are generated by nesting the micromirrors 62, 64 of two Fresnel concave mirrors A and B in a checkerboard manner.
- the Fresnel mirrors in a simple example are initially each formed from 30 x 30 micromirrors 62, which form a Fresnel concave mirror A and from 30 x 30 micromirrors 64, which bil a Fresnel concave mirror B.
- every second mirror is then alternately discarded and the remaining micromirrors are nested in one another in a chessboard-like manner, as shown schematically in the top view of FIG. 7 and the side view of FIG.
- the micromirrors 62, 64 can each have a base area of 20 ⁇ , for example 20 mih 2 , so that the nesting area 60 takes up a total area of 600 ⁇ 600 gm 2 .
- the micromirrors 62 contribute to the generation of the light spot 72 and together form the Fresnel concave mirror A.
- the micromirrors 64 accordingly contribute to the generation of the light spot 74 and together form the Fresnel concave mirror B.
- the distance between the light spots 72 corresponds
- more than two small light spots can be arranged close to one another in this way and a desired light spot pattern can be generated as a result.
- the motifs tend to become blurred, provided they are not viewed with a practically point-like light source.
- a high degree of interleaving therefore requires good viewing conditions, while light spot images with a lower degree of interleaving (2 to 10) can be resolved well even under moderate or poor viewing conditions.
- the Fresnel mirrors 28 are generally formed by an arrangement of nxn micromirrors with a linear dimension d m and the desired patterns are generated by a grid with kxk elements, the optical diameter d of the Fresnel mirrors 28 in each case d « k * n * d m , so that there is a maximum floating height of fmax ⁇ 5 * k * n * dm, while the minimum distance between two light spots is only Amin - k dm, i.e. is a factor n smaller than at non-nested arrangement. In this way, a small distance A m m between adjacent light spots can be combined with a large floating height f max .
- the light spot patterns can also be generated by other grids or arrangements than the square light spot grids with kxk elements assumed for simplicity of explanation.
- FIG. 9 shows a plan view of the surface area 24 of a corresponding display element 80 which, when illuminated, shows a plurality of light spot patterns 82 in the form of the letter sequence “EU”.
- the light spot patterns 82 are each formed from a plurality of small light spots. Analogous to the illustration in FIG. 3, the light spot patterns 82 seem to float at a constant height for the viewer in the area 52, while their floating height in the central area of the display element 80 continuously follows the surface profile of a hemisphere 50 protruding from the surface area.
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102020000389.3A DE102020000389A1 (de) | 2020-01-22 | 2020-01-22 | Darstellungselement für Lichtfleckenbild |
PCT/EP2021/025022 WO2021148244A1 (de) | 2020-01-22 | 2021-01-21 | Darstellungselement für lichtfleckenbild |
Publications (1)
Publication Number | Publication Date |
---|---|
EP4093616A1 true EP4093616A1 (de) | 2022-11-30 |
Family
ID=74347035
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP21702159.1A Pending EP4093616A1 (de) | 2020-01-22 | 2021-01-21 | Darstellungselement für lichtfleckenbild |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP4093616A1 (de) |
CN (1) | CN114728535B (de) |
DE (1) | DE102020000389A1 (de) |
WO (1) | WO2021148244A1 (de) |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN1888949A (zh) * | 2006-07-12 | 2007-01-03 | 张华升 | 隐藏图像识别系统、制品、识别装置及制作方法 |
DE102010047250A1 (de) | 2009-12-04 | 2011-06-09 | Giesecke & Devrient Gmbh | Sicherheitselement, Wertdokument mit einem solchen Sicherheitselement sowie Herstellungsverfahren eines Sicherheitselementes |
DE102009056934A1 (de) * | 2009-12-04 | 2011-06-09 | Giesecke & Devrient Gmbh | Sicherheitselement, Wertdokument mit einem solchen Sicherheitselement sowie Herstellungsverfahren eines Sicherheitselementes |
DE102010048262A1 (de) * | 2010-10-12 | 2012-04-12 | Giesecke & Devrient Gmbh | Darstellungselement |
DE102010055688A1 (de) | 2010-12-22 | 2012-06-28 | Giesecke & Devrient Gmbh | Optisch variables Element |
AU2012100985B4 (en) * | 2012-06-29 | 2012-11-15 | Ccl Secure Pty Ltd | Optically variable colour image |
DE102015202106A1 (de) * | 2015-02-06 | 2016-08-11 | Tesa Scribos Gmbh | Optisch variables Sicherheitselement |
-
2020
- 2020-01-22 DE DE102020000389.3A patent/DE102020000389A1/de active Pending
-
2021
- 2021-01-21 WO PCT/EP2021/025022 patent/WO2021148244A1/de unknown
- 2021-01-21 CN CN202180006681.0A patent/CN114728535B/zh active Active
- 2021-01-21 EP EP21702159.1A patent/EP4093616A1/de active Pending
Also Published As
Publication number | Publication date |
---|---|
WO2021148244A1 (de) | 2021-07-29 |
DE102020000389A1 (de) | 2021-07-22 |
CN114728535B (zh) | 2023-10-03 |
CN114728535A (zh) | 2022-07-08 |
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