CN108615454B - Reflective film containing dynamic three-dimensional spiral line and motor vehicle license plate - Google Patents
Reflective film containing dynamic three-dimensional spiral line and motor vehicle license plate Download PDFInfo
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- 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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
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- 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
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Abstract
The invention discloses a reflective membrane containing a dynamic three-dimensional spiral line, which comprises a reflective membrane main body, wherein at least one curve is respectively arranged on two opposite surfaces of the reflective membrane main body in a floating manner, the at least one curve on the two opposite surfaces is paired to form the spiral line, the spiral line is decomposed into the synthesis of reciprocating motion in the x direction and the z direction and the motion in the y direction, the x-y plane is a plane where the reflective membrane main body is located, the z direction is vertical to the x-y plane, the spiral line forms a closed curve or a synthetic motion track of a straight line segment in one period in the reciprocating motion in the x direction and the z direction, and the closed curve is stretched and expanded along the y direction in the motion in the y direction. The invention also discloses a motor vehicle license plate. The invention can meet the requirements of low cost and high safety of the reflective film, the reflective film does not need to be subjected to additive manufacturing, patterns do not need to be printed inside the reflective film, the spiral line cannot be copied by equipment such as a scanner, a camera and the like, and the optical characteristics of the dynamic three-dimensional spiral line of the manufactured reflective film are easily recognized by human eyes.
Description
Technical Field
The invention relates to a reflective film, in particular to a reflective film containing a dynamic three-dimensional spiral line and a motor vehicle license plate.
Background
The motor vehicle license plate is an effective certificate for carrying out system management on vehicles by a public security traffic control department, and the license plate identification is mainly based on the technical characteristics contained in the reflective film, usually adopts the modes of fluorescent patterns, printing special marks inside the reflective film interlayer and the like, has low technical level, and is difficult to effectively prevent the problems of license plate overlapping and the like.
Patent document CN499285Y proposes an intelligent anti-counterfeit technology in which an electronic chip is embedded in a number plate substrate, wherein a specific identification code is stored in the electronic chip, and the chip is scanned by a traffic management person through a handheld device, so as to obtain various data corresponding to the number plate. The method needs to establish a huge detection network and has huge investment. Patent document CN104494533A proposes a QR two-dimensional code made of invisible material on a motor vehicle number plate, the invisible material is ultraviolet fluorescent water-based invisible ink, each QR two-dimensional code is given to a unique code of each product, and a road traffic police inquires the number plate information through special scanning equipment. However, the ultraviolet fluorescent material belongs to the conventional technology, and the difficulty of implementing the technical process is not high. Patent document CN2363337 uses a layer of film inside a reflective film, and the film is thermoprinted with holographic patterns, this method increases the manufacturing cost of the reflective film, and the holographic patterns need to be observed in close range, and meanwhile, the manufacturing technology of holograms is popular, so it is difficult to have uniqueness and security when a common hologram is used on a number plate.
Disclosure of Invention
In order to solve the technical problems, the invention provides a reflective film containing a dynamic three-dimensional spiral line and a motor vehicle license plate, so as to meet the requirements of low cost and high safety of the reflective film, the reflective film does not need to be subjected to additive manufacturing on the reflective film, patterns do not need to be printed inside the reflective film, the spiral line cannot be copied by a scanner, a camera and other equipment, and the optical characteristics of the dynamic three-dimensional spiral line of the manufactured reflective film are easily recognized by human eyes.
In order to achieve the purpose, the technical scheme of the invention is as follows:
a reflective membrane containing a dynamic three-dimensional spiral line comprises a reflective membrane main body, wherein at least one curve is respectively arranged on two opposite surfaces of the reflective membrane main body in a floating mode, the at least one curve on the two opposite surfaces is paired to form the spiral line, the spiral line is decomposed into a synthesis of reciprocating motion in the x direction and the z direction and motion in the y direction, the x-y plane is a plane where the reflective membrane main body is located, the z direction is perpendicular to the x-y plane, the spiral line forms a closed curve or a synthesis motion track of a straight line segment in one period in the reciprocating motion in the x direction and the z direction, and the closed curve is stretched and unfolded in the y direction in the motion in the y direction.
Further, the above spiral has a parametric equation (1):
wherein A, B is the amplitude in x and z directions and the phase constant w0Adjusting the resultant motion curve locus of the x-z plane, v in the y direction0The motion causes the closed curve to stretch open in the y-direction.
Further, in the above parameter equation (1), the reciprocating motion in the x direction is simple harmonic motion, the z value is a constant, the spiral line includes a periodic sine curve or cosine curve of the upward floating and the downward sinking, and the parameter equation (2) of the upward floating curve is as follows:
the sinking curve parameter equation (3) is as follows:
in the above formula, A1，A2Is the amplitude of the sine line and,
v0, y0, z1, z2 are all constants for the initial phase.
Further, in the above parametric equations (2) and (3), when the phase constants w1 and w2 are 0 and pi, the spiral line includes a rising and falling spatial inclined sinusoidal curve having an inclination angle of 45 ° with respect to the x-y plane.
Further, in the above parameter equation (1), the reciprocating motion in the x and z directions is simple harmonic motion, the spiral line includes a floating three-dimensional spiral curve and a sinking three-dimensional spiral curve, and the parameter equation (4) of the floating three-dimensional spiral curve is as follows:
the parametric equation (5) for the sinking three-dimensional spiral curve is as follows:
wherein, B1 and B2 are the amplitudes of the floating curve and the sinking curve in the z direction.
Furthermore, the projections of the floating three-dimensional spiral curve and the sinking three-dimensional spiral curve on an x-z plane are closed curves.
Further, the closed curve is a symmetrical closed curve.
Further, the closed curve is an ellipse, and the parameters of the major axis and the minor axis of the ellipse are the amplitudes in the x direction and the z direction respectively, wherein the phase constant can adjust the orientation of the major axis and the minor axis of the three-dimensional spiral curve in space.
Furthermore, the vertical positive projection curves of the upward-floating three-dimensional spiral curve and the downward-floating three-dimensional spiral curve on the plane of the reflective film are periodic corrugated lines.
The motor vehicle license plate comprises a license plate main body, wherein the license plate main body is provided with the reflecting film containing the dynamic three-dimensional spiral line.
In the reflective film of the invention, the spiral line has the geometric characteristics described by the above equation, and the double spiral line of the reflective film observed by human eyes has the following effects: 1) one of the double spiral lines is suspended above the surface of the reflective film, and the other spiral line is sunk below the surface of the reflective film, so that the three-dimensional effect is achieved; the floating curve is observed in a moving mode, and the effect of changing the spatial position of the upward-floating spiral line and the downward-floating spiral line is the same as that of observing a real-space three-dimensional object in daily life; 2) the observed result is a projection curve of the floating pattern on the plane of the reflective film, and the shape of the projection curve meets the general geometric light projection rule; when the reflector is observed in a moving way, the two projection curves move relatively on the plane of the reflector; 3) the observed floating curve or two-dimensional projection image is visible to human eyes within a certain field angle, the range of the observable field angle is preferably not less than +/-10 degrees, and the floating graph beyond the range of the field angle is invisible.
Therefore, the dynamic three-dimensional spiral line is manufactured on the reflective film, the dynamic three-dimensional spiral line can be recognized by human eyes under the irradiation of natural environment light, the recognized spiral line has a floating or sinking three-dimensional effect relative to the surface of the reflective film, and when an observer watches the reflective film in a moving mode, the spiral line has the characteristic of dynamic change. Therefore, the invention can meet the requirements of low cost and high safety of the reflective film, the reflective film does not need to be subjected to additive manufacturing, patterns do not need to be printed inside the reflective film, the spiral line cannot be copied by a scanner, a camera and other equipment, and the optical characteristics of the dynamic three-dimensional spiral line of the manufactured reflective film are easily recognized by human eyes.
Drawings
Fig. 1 is a schematic structural diagram of a three-dimensional (stereoscopic) double-spiral reflective film with floating and sinking effects and a number plate thereof in an embodiment of the invention.
Fig. 2 is a schematic diagram of a vertical projection curve of a dynamic three-dimensional double helix on the surface of a reflective film in the embodiment of the invention.
Fig. 3 is a schematic diagram of the double helix geometric position relationship observed when the number plate is turned upwards in the embodiment of the invention.
Fig. 4 is a schematic diagram of the double helix geometric position relationship observed when the number plate is turned downwards in the embodiment of the invention.
Fig. 5 is a schematic diagram of the geometric position relationship of the double spirals observed when the number plate is turned to the left in the embodiment of the invention.
Fig. 6 is a schematic diagram of the geometric position relationship of the double spirals observed when the number plate is turned to the right in the embodiment of the invention.
Fig. 7 is a schematic structural diagram of a reflective film with a floating and sinking three-dimensional double spiral line and a number plate thereof in the embodiment of the invention.
Fig. 8 is a schematic diagram of a geometric position relationship of a three-dimensional double helix projection curve observed when the number plate is turned left in the embodiment of the invention.
Fig. 9 is a schematic diagram of the geometric position relationship of the double spiral projection curve observed when the number plate is turned to the right in the embodiment of the invention.
Fig. 10 is a schematic structural diagram of a reflective film with a floating and sinking inclined two-dimensional double spiral line and a number plate thereof in the embodiment of the invention.
Fig. 11 is a schematic diagram of the geometric position relationship of the inclined two-dimensional double spiral lines observed when the number plate is turned upwards in the embodiment of the invention.
Fig. 12 is a schematic diagram of the geometric position relationship of the inclined two-dimensional double spiral lines observed when the number plate is turned downwards in the embodiment of the invention.
Fig. 13 is a schematic diagram of the geometric position relationship of the oblique two-dimensional double spiral lines observed when the number plate is turned to the right in the embodiment of the invention.
Fig. 14 is a schematic diagram of the geometric position relationship of the two-dimensional double spiral lines observed when the number plate is turned to the left in the embodiment of the invention.
FIG. 15 is a schematic diagram of a closed curve with a symmetrical structure according to an embodiment of the present invention.
Fig. 16 is a schematic structural diagram of a reflective film with a floating three-dimensional spiral line and a sinking two-dimensional spiral line and a license plate thereof in the embodiment of the invention.
Fig. 17 is a schematic structural diagram of a reflective film with a floating two-dimensional spiral line and a sinking three-dimensional spiral line and a license plate thereof in the embodiment of the invention.
FIG. 18 is a schematic structural diagram of a reflective film and its number plate with suspended and sunken double spirals at other positions in an embodiment of the present invention.
FIG. 19 is a diagram illustrating the relationship between the observation angle and the observation distance of the double spiral line of the number plate according to the embodiment of the present invention.
Detailed Description
Preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
This example describes primarily a reflective film containing a dynamic three-dimensional double helix, the double helix having one visually floating above the surface of the reflective film and the other visually sinking below the surface of the reflective film, the stereoscopic vision effects of floating and sinking being referred to collectively hereinafter as floating. The moving viewing of the floating double helix has a dynamically changing viewing effect, and the parameters of the observed double helix structure and the visual characteristics are described in more detail below.
The parametric equation for a spatially floating spiral curve has the form:
the spatial helix can be decomposed into a composition of the following motions: reciprocating motion in the x and z directions and uniform (or non-uniform) motion in the y direction. The x-y plane is the plane of the reflective film, and the z direction is perpendicular to the plane of the reflective film. A, B in the parameter equation are amplitudes in the x and z directions. The reciprocating motion in the x and z directions ensures that the resultant motion track in one period is a closed curve or a straight line segment with a phase constant w0Adjusting the resultant motion curve locus of the x-z plane, v in the y direction0The motion causes the closed curve to stretch open in the y-direction, forming a spatially distributed spiral curve.
In the reflective film of the embodiment, the spiral line has the geometric characteristics described by the above equation, and the double spiral line of the reflective film observed by human eyes has the following effects: 1) one of the double spiral lines is suspended above the surface of the reflective film, and the other spiral line is sunk below the surface of the reflective film, so that the three-dimensional effect is achieved; the floating curve is observed in a moving mode, and the effect of changing the spatial position of the upward-floating spiral line and the downward-floating spiral line is the same as that of observing a real-space three-dimensional object in daily life; 2) the observed result is a projection curve of the floating pattern on the plane of the reflective film, and the shape of the projection curve meets the general geometric light projection rule; when the reflector is observed in a moving way, the two projection curves move relatively on the plane of the reflector; 3) the observed floating curve or two-dimensional projection image is visible to human eyes within a certain field angle, the range of the observable field angle is preferably not less than +/-10 degrees, and the floating graph beyond the range of the field angle is invisible.
Therefore, this embodiment makes the three-dimensional helix of developments on the reflective membrane, and the three-dimensional helix of developments can be discerned by the people's eye under natural environment light irradiation, and the relative reflective membrane surface of helix discerned has the cubic effect that floats or sink, and when the observer removed and watches, the helix had dynamic change's characteristic. Therefore, the embodiment can meet the requirements of low cost and high safety of the reflective film, additive manufacturing on the reflective film is not needed, patterns do not need to be printed inside the reflective film, the spiral line cannot be copied by equipment such as a scanner and a camera, and the optical characteristics of the dynamic three-dimensional spiral line of the manufactured reflective film are easily recognized by human eyes.
The following will describe in detail by way of specific examples.
Example 1
In the floating double-helix parameter equation (1), the reciprocating motion in the x direction is preferably simple harmonic motion, the z value is a constant, a floating and sinking periodic sine or cosine curve is contained on the reflective film, and the floating and sinking curve parameter equation is as follows:
upward floating curve:
sinking curve:
in the above formula, A1，A2Is the amplitude of the sine line and,
v0, y0, z1, z2 are all constants for the initial phase. For example, the parameter a 1-B1-10 mm,
v0 is 20mm/s, y0 is 30mm, w is 1, z1 is 20mm, z2 is 20mm, the floating sine curve has a floating height of 20mm relative to the surface of the reflective film, the sinking sine curve has a sinking height of 20mm relative to the surface of the reflective film, and the floating and sinking sine curves are observed in an orientation plane with parallax in the horizontal plane (or vertical plane) of the license plateThe chord curve has a floating effect as shown in figure 1, wherein 1 is a reflecting film plane, 1a is a floating curve, and 1b is a sinking curve. The floating curve is observed in a moving mode, and the spatial position change relation is the same as that of a real-space three-dimensional object observed in a daily dynamic mode.
Preferably, the floating sinusoid of the retroreflective sheeting has a 360 full parallax, and the viewer can observe both floating stereopsis and real space dynamics in any orientation plane.
In another preferred embodiment, the reflective film has no parallax in the horizontal direction and has parallax in the vertical direction. The horizontal direction is the long side direction of the reflective film as shown in fig. 2, and the vertical direction is the short side direction. As described above, only two-dimensional projection curves of floating curves can be observed in the long-side direction, and the maximum dynamic change effect is exhibited between the projection curves in dynamic observation. Fig. 2, 1a and 1b, show the forward projection curves of the floating sine lines in the plane perpendicular to the reflective film. It is readily apparent that the projected curve 1a and the floating curve 1b are different visual responses of the same object. At this time, the curves 1a and 1b are located in the same strip-shaped position of the reflective film plane 1, the distances between the wave troughs of the projected curves 1a and 1b and the long edge of the reflective film plane 1 are D, the curves 1a and 1b preferably have the same period T and amplitude a, the curves 1a and 1b have a certain phase difference, and the geometric expression shows that the adjacent wave crests of the curves shown in fig. 2 have a spacing P. The parameters D25 mm, T27 mm, a 10mm and P7 mm are preferred. When the floating curves 1a and 1b on the reflective film are continuously and dynamically observed within an observable visual angle, the floating curve 1a and the sinking curve 1b have dynamic visual characteristics of relatively and continuously moving on the surface of the reflective film. The two curves 1a and 1b have the dynamic characteristic of relatively continuous movement when the number plate is turned up and down for a certain angle to be dynamically observed.
Fig. 3 is a position relationship of a projection curve when the number plate is turned upwards to the maximum observable viewing angle, and in the process of turning upwards, the observer can see that the curve 1a continuously moves towards the upper part of the surface 1 of the reflective film, and the curve 1b continuously moves towards the lower part.
Fig. 4 shows the position relationship of the two projection curves when the number plate is turned downwards to the maximum observable viewing angle position, which is opposite to fig. 3. in the dynamic observation, the curve 1a moves downwards in the plane 1 of the reflective film and the curve 1b moves upwards. The principles of stereopsis and dynamic viewing characteristics described above are equally applicable to interpreting visual effects on retroreflective sheeting that have other parallax information. For example, the floating curve of the reflective film has parallax in the horizontal direction, but has no parallax in the vertical direction, so that a floating spatial sinusoidal curve can be observed in the horizontal direction, and no stereoscopic effect can be observed in the vertical direction, so that only a projection curve of the floating curve can be observed.
Similar to the dynamic observation behavior of the number plate turned up and down, when the number plate is turned left and right within the observable viewing angle, the change relationship of the projection curve of the floating sine line is shown in the attached drawings 5 and 6, wherein the attached drawing 5 is the relationship between the shape and the spatial position of the double spiral curve when the number plate is turned left to the maximum observable viewing angle, and the attached drawing 6 is the relationship between the shape and the spatial position of the projection curves 1a and 1b when the reflective film is turned right.
In this embodiment, the shape of the floating spiral is not limited to the preferred sinusoidal line, but may be other curves or patterns, and the waveform in the half period of the curve may be a parabolic curve, a gaussian bell-shaped curve, a spline curve, or other similar curves. Viewing other shapes of the helix in an orientation plane with or without parallax, the visual response characteristics satisfy the foregoing principles.
Example 2
In the three-dimensional double-helix parameter equation (1), the reciprocating motion in the x and z directions is preferably simple harmonic motion, a floating and sinking three-dimensional double-helix curve can be manufactured on a reflective film, and the floating and sinking three-dimensional curve parameter equation is as follows:
upward floating curve:
sinking curve:
b1 and B2 are upward floating curve and downward sinking curve in the z directionThe other variables have the same meaning as in example 1, preferably the variable w is 1, a1 is 10mm for a2, B1 is 10mm for B2,
v 0-20 mm/s, y 0-30 mm, w 1-w 2-pi/2, z 1-20 mm, z 2-15 mm. According to the optimized parameters, the x-z plane projection curves of the three-dimensional double spiral curve are all circular and have the diameter of 10 mm.
The three-dimensional effect of the floating three-dimensional double helix is observed in the orientation plane of the reflective film with parallax, as shown in figure 7, wherein the helix 2a floats above the plane of the reflective film, and the helix 2b sinks below the plane. Unlike the floating two-dimensional sinusoidal lines 1a and 1b in embodiment 1, the three-dimensional structure of the three-dimensional double spiral line itself can also be visually perceived by an observer. The three-dimensional object is observed in a moving mode, the three-dimensional double spiral line floats, and the spatial position change relation is the same as that of a real-space three-dimensional object observed in a daily dynamic mode. Preferably, the manufactured floating and sinking spiral curves have 360-degree full parallax, and the observer can observe stereoscopic vision and real space dynamic change effects of suspension and sinking in any orientation plane.
In the same manner as in example 1, another preferable embodiment is that the light reflecting film has no parallax in the horizontal direction and has a parallax in the vertical direction thereof, or vice versa. The horizontal and vertical directions are as described in example 1. As before, a real three-dimensional double helix structure can be observed on the reflective film with parallax direction, one helix floats above the reflective film, and the other helix sinks on the plane of the reflective film. When the mobile observation is carried out, the position relation of the double spiral lines changes as the three-dimensional object in the real space, and an observer can understand the three-dimensional object according to the experience of daily life. And when the two-dimensional light projection curves of the suspended and sinking spiral lines on the plane of the reflective film are observed in the direction without parallax, and the maximum dynamic change effect exists between the projection curves when the two-dimensional light projection curves are observed in a moving way. As described in embodiment 1, there is parallax in the horizontal direction and no parallax in the vertical direction, and the typical viewing angle projection effect observed is moire as depicted in fig. 2, and the same parameters are used to describe the characteristics of moire lines. When the number plate is turned up and down, the dynamic change relationship of the projection curve is similar to that described in the attached figures 3 and 4. In contrast, when there is parallax in the horizontal direction and there is no parallax information in the vertical direction, the relationship between the waveform change and the geometric position change of the projection curve when the number plate is turned left and right is as shown in fig. 8 and 9. It is easy to see that the variation of the projection curve of the double helix in different directions is different from the variation relationship of the two-dimensional sine curve in the embodiment 1 due to the three-dimensional structure of the double helix.
Example 3
In the preferred parametric equations (4) and (5) in example 2, when the amplitudes in the x and z directions are different, the reflective film contains a floating and sinking three-dimensional double-spiral curve, the projections of the floating and sinking three-dimensional curves in the x-z directions are ellipses, and the parameters of the major axis and the minor axis of the ellipses are the amplitudes in the x and z directions respectively, wherein the phase constant can adjust the orientation of the major axis and the minor axis of the three-dimensional spiral curve with the elliptic section in space. Preferred parameters a 1-a 2-B1-15 mm, B2-5 mm,
the section of the double-helix curve x-z is an ellipse according to the selected parameters, wherein v0 is 20mm/s, y0 is 30mm, w1 is w2 pi/2, w is 1, z1 is 20mm, and z2 is 15 mm. The visual observation effect of the elliptic three-dimensional double spiral line made on the reflective film depends on the parallax information of the spiral line, preferably, the parallax information is the same as that in embodiment 1 and embodiment 2, the three-dimensional dynamic observation effect is similar to that in embodiment 2, the projection curve of the three-dimensional curve on the reflective film is observed in the direction without parallax, and the projection waveforms in different view angle directions conform to the geometric light projection rule of the three-dimensional object on the plane.
Example 4
In the preferred parametric equation of example 2, when the phase constants w1 and w2 are 0 and pi, the reflective film contains a floating and sinking spatial inclined sinusoidal curve, the floating and sinking sinusoidal curve forms an inclination angle of 45 ° with the reflective film plane 1, and the observed floating and sinking stereoscopic effects of the spatial inclined sinusoidal curve are shown in fig. 10, where 3a is a floating curve and 3b is a sinking curve. Preferred parameters a 1-a 2-B1-15 mm, B2-5 mm,
and v0 is 20mm/s, y0 is 30mm, w is 1, z1 is 20mm, and z2 is 15mm, and the projections of the sections of the double spiral curve x-z are all straight-line segments according to selected parameters. The visual observation effect of the inclined double-sinusoidal curve on the reflective film depends on the parallax information of the spiral line, and preferably, the parallax information is the same as that of embodiment 1 and embodiment 2, and the three-dimensional dynamic observation effect is similar to that described above. The projection curve of the three-dimensional curve on the surface 1 of the reflective film is observed in the direction without parallax, the projection waveforms in different view angle directions conform to the projection rule of the geometric light of the three-dimensional object on the plane, and the observed typical view angle projection effect, such as the ripple depicted in figure 2, has the same characteristic parameters of the ripple lines. When there is no parallax in the horizontal or vertical direction of the plane of the reflective film, and the number plate is turned up, down, left, and right to the maximum observable viewing angle, the positional relationship of the projection curves is shown in fig. 11, 12, 13, and 14, respectively, and in the process of turning the number plate, the waveform and positional change relationship of the projection curves 3a and 3b are determined by the projection rule of the three-dimensional object on the plane 1 of the reflective film, similar to those in embodiment 1. For example, as shown in fig. 11, since the spatially floating sine line has an oblique angle with the number plate plane 1, the floating projection curves 3a and 3b on the reflective film plane 1 have a visual effect of stretching and compressing, respectively, when the number plate is turned upwards.
Example 5
As mentioned above, the preferred simple harmonic motion in x and z directions in embodiments 2, 3 and 4 uses different parameters, and the projection curve on the x-z plane is a closed curve or a straight line segment, and the closed curve is a circle or an ellipse. In this embodiment, the synthetic locus of the periodic reciprocating motion in the x and z directions may also be other closed curves, the closed curve is shown in fig. 15, the closed curve has an axisymmetric characteristic, half of the symmetric graph is the synthetic locus of the x and z half-cycle motions, the half-cycle trajectory curve is a parabola, a gaussian bell-shaped curve, a spline curve or other closed curves similar in appearance, the closed curve in the x and z directions is stretched and deformed into a spatial spiral by the uniform motion in the y direction, and the spatial double spiral made on the reflective film is observed, and has one floating on the surface of the reflective film and the other sinking below the surface. A floating and sinking three-dimensional space double helix line can be observed in an orientation plane with parallax, the three-dimensional helix line is observed in a direction without parallax, and the observation result is a two-dimensional projection image. The forward projected moire curve on the vertical retroreflective sheeting plane 1 is a sine curve, cosine curve, circular arc curve, elliptic curve, parabolic curve, gaussian bell curve, spline curve, and other appearance similar moire curves. The three-dimensional figure on the plane of the number plate is dynamically observed, and the visual effect is the same as the law described in the embodiments 1, 2, 3 and 4.
The floating double helix observed in the reflective film containing the three-dimensional double helix and the motor vehicle license plate using the reflective film of the embodiment is composed of the helix pairs described in embodiments 1, 2, 3 and 4. For example, the observed helix levitation and sinking effects are shown in fig. 16, 17. In the reflective film of fig. 16, the observed sunken helix is the two-dimensional sinusoidal line 1b described in example 1, while the floating helix is the three-dimensional helix 2a in example 2, and fig. 17 is the reverse of fig. 16. The floating double helix of fig. 16, 17 in this embodiment is only two instances of the combination of helices in the previous embodiments. It is obvious that the spiral or other patterns described in the foregoing embodiments and other possible combinations of patterns are within the scope of the invention of the present embodiment. The observed characteristics and preferred characteristic parameters of the double helix, depicted in figures 16 and 17 and including other possible floats and sinks, are the same as in the previous embodiment.
Example 6
In order to make the reflective film of the present invention suitable for various specifications of motor vehicle license plates and other applications, it is observed that the reflective film of the present invention has a double helix of suspension and sinking, which is not limited to the position described in the embodiments, and can be any position and any direction on the reflective film, for example, the direction of the helix can be as shown in fig. 18. Obviously, observing the helix at different locations on the reflective film does not add any creative work. Embodiments in which the observed floating helix characteristics are the same as in the previous embodiments but are located differently on the reflective film are within the scope of the invention.
When the motor vehicle license plate of the reflective film is installed on a motor vehicle, the floating and sinking double helix patterns can be conveniently observed by human eyes under the irradiation of ambient light. Since the number plate has double spiral lines which can be seen only in a certain angle of view, as shown in fig. 19, assuming that the maximum upward observable viewing angle forms an angle θ with the horizontal plane, and the height of the observer's eye from the horizontal plane is L, the minimum observable distance D from the number plate plane is L/tan θ, the observer can move the double spiral line pattern of the number plate downward at the distance, or move the double spiral line pattern backward to increase the observation distance to decrease the observation viewing angle, and the observed double spiral line dynamic visual effect is the same as the changing effect when the number plate is turned upward in the foregoing embodiment, and the observation effect in other directions can be understood according to the observation characteristics of up, down, left and right. From the observation effect, under the outdoor environment, with the light irradiation of directionality, the effect of the double helix figure of observation is better, especially adopts illumination such as flashlight, cell-phone light, and the observation effect is better. At night, when the automobile is irradiated by a high beam lamp of the automobile, the reflecting film reflects the light backwards, and the number plate is observed within the field range of the high beam retroreflection direction, so that double spirals with strong contrast can be seen.
The floating double spiral line is preferably a two-dimensional sine or cosine curve or a three-dimensional spiral line. The forward vertical projection curve of the two-dimensional sine or cosine curve on the plane of the reflective film is the curve itself, and the projection curve shapes in other visual angle directions meet the projection rule of geometric rays. The projection pattern of the floating three-dimensional double-spiral curve on the x-z plane is a symmetrical closed curve, preferably a circle, an ellipse, a straight line segment, a parabola, a Gaussian bell line, a spline curve and other closed curves. The vertical forward projection curve of the floating double spiral line on the plane of the reflective film is a periodic corrugated line, and the half-cycle waveform of the corrugated line is a sine curve, a cosine curve, an arc line, an elliptic line, a parabola, a Gaussian bell-shaped line, a spline curve and other similar curves in appearance. Characteristic parameters describing the two periodic projection curves include: period T, amplitude A, phase difference P. The parallax provided by the double helix is isotropic or anisotropic. The isotropic parallax is that floating double spiral lines can be observed in any orientation plane within an observable visual angle range, the anisotropy is different, only the projection curve of the floating double spiral lines in the plane of the reflective film can be observed in the orientation plane without parallax information, and the anisotropy is preferably that the horizontal direction has parallax and the vertical direction has no parallax or is opposite. Moving the observation double helix in the orientation plane with parallax, the double helix has dynamic characteristics like relative movement of real space objects. And moving observation in an orientation plane without parallax, only the geometric light projection curves of the spiral line on the surface of the reflective film in different visual angle directions can be seen visually, and the positions of the projection curves have the visual characteristic of relative movement. The position of the floating spiral line can be manufactured at any position of the plane of the reflective film, and the floating spiral line can have any required line width. The floating spiral line is visible to the human eye under ambient light illumination, and the best observation effect is to use a directional light source for illumination (such as sunlight, a flashlight, a mobile phone light source and the like).
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various changes and modifications can be made without departing from the inventive concept of the present invention, and these changes and modifications are all within the scope of the present invention.
Claims (8)
1. The reflective film is characterized by comprising a reflective film main body, wherein at least one three-dimensional curve is respectively arranged on two opposite surfaces of the reflective film main body in a floating mode, the at least one three-dimensional curve on the two opposite surfaces is paired to form a spiral line, the spiral line is decomposed into the synthesis of reciprocating motion in the x direction and the z direction and the synthesis of motion in the y direction, the x-y plane is a plane where the reflective film main body is located, the z direction is perpendicular to the x-y plane, the spiral line forms a closed curve or a synthesized motion track of a straight line segment in one period in the reciprocating motion in the x direction and the z direction, and the closed curve is stretched and unfolded in the y direction.
2. A reflective film comprising a dynamic solid spiral according to claim 1, wherein said spiral has the parameter equation (1):
wherein A, B is the amplitude in x and z directions and the phase constant w0Adjusting the resultant motion curve trajectory of the x-z plane, v in the y direction0The motion causes the closed curve to stretch open in the y-direction.
3. The reflective film containing a dynamic three-dimensional spiral line as claimed in claim 2, wherein in the parameter equation (1), the reciprocating motion in the x and z directions is simple harmonic motion, the spiral line comprises a floating three-dimensional spiral curve and a sinking three-dimensional spiral curve, and the parameter equation (4) of the floating three-dimensional spiral curve is as follows:
the parametric equation (5) of the sinking three-dimensional spiral curve is as follows:
wherein, B1 and B2 are the amplitudes of the floating curve and the sinking curve in the z direction.
4. The reflective film containing a dynamic solid helical line according to claim 3, wherein the projections of the floating three-dimensional helical curve and the sinking three-dimensional helical curve on the x-z plane are closed curves.
5. The reflective film containing a dynamic solid spiral according to claim 4, wherein the closed curve is a symmetric closed curve.
6. The reflective film according to claim 4 or 5, wherein the closed curve is an ellipse, and the parameters of the major axis and the minor axis of the ellipse are the amplitudes in the x and z directions, respectively, and the phase constant can adjust the orientation of the major axis and the minor axis of the three-dimensional spiral curve in space.
7. The reflective film containing the dynamic solid helical line as claimed in claim 3, wherein the vertical forward projection curves of the upward-floating three-dimensional helical curve and the downward-sinking three-dimensional helical curve on the reflective film plane are periodic corrugated lines.
8. A motor vehicle number plate, which comprises a number plate main body, and is characterized in that the number plate main body is provided with a reflecting film containing a dynamic three-dimensional spiral line as claimed in any one of claims 1 to 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201810445607.9A CN108615454B (en) | 2016-07-08 | 2016-07-08 | Reflective film containing dynamic three-dimensional spiral line and motor vehicle license plate |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810445607.9A CN108615454B (en) | 2016-07-08 | 2016-07-08 | Reflective film containing dynamic three-dimensional spiral line and motor vehicle license plate |
| CN201610534526.7A CN105957446B (en) | 2016-07-08 | 2016-07-08 | A kind of reflective membrane and automotive number plate containing dynamic solid helix |
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| CN201610534526.7A Division CN105957446B (en) | 2016-07-08 | 2016-07-08 | A kind of reflective membrane and automotive number plate containing dynamic solid helix |
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| CN108615454A CN108615454A (en) | 2018-10-02 |
| CN108615454B true CN108615454B (en) | 2020-03-20 |
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| CN201810445607.9A Active CN108615454B (en) | 2016-07-08 | 2016-07-08 | Reflective film containing dynamic three-dimensional spiral line and motor vehicle license plate |
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| WO (1) | WO2018006637A1 (en) |
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| CN105957446B (en) * | 2016-07-08 | 2018-07-03 | 公安部交通管理科学研究所 | A kind of reflective membrane and automotive number plate containing dynamic solid helix |
| CN109300392A (en) * | 2018-10-22 | 2019-02-01 | 海南亚元防伪技术研究所（普通合伙） | Anti- recycling label can be removed |
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| DE102004017093B4 (en) * | 2004-04-07 | 2007-09-20 | Leonhard Kurz Gmbh & Co. Kg | Embossing foil for the production of counterfeit-proof motor vehicle number plates and counterfeit-proof motor vehicle license plate with such embossing foil and use |
| CN101505998B (en) * | 2006-08-23 | 2012-08-22 | 日本电石工业株式会社 | Vehicle license plate and retroreflective sheet used for the same |
| CN201208940Y (en) * | 2008-02-03 | 2009-03-18 | 陈志龙 | Vehicle license rank anti-counterfeit light-reflection film |
| US10082609B2 (en) * | 2009-11-12 | 2018-09-25 | 3M Innovative Properties Company | Irradiation marking of retroreflective sheeting |
| CN101811481A (en) * | 2010-04-28 | 2010-08-25 | 燕山大学 | Anti-counterfeiting license plate containing optical hidden code and production and identification method thereof |
| CN202608159U (en) * | 2012-02-29 | 2012-12-19 | 3M中国有限公司 | Safe-guarding and anti-counterfeiting thin film |
| CN102750874B (en) * | 2012-06-05 | 2015-07-08 | 北京华商电力管道有限公司 | Light-reflection anti-fake label |
| CN105957446B (en) * | 2016-07-08 | 2018-07-03 | 公安部交通管理科学研究所 | A kind of reflective membrane and automotive number plate containing dynamic solid helix |
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2016
- 2016-07-08 CN CN201610534526.7A patent/CN105957446B/en active Active
- 2016-07-08 CN CN201810445607.9A patent/CN108615454B/en active Active
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- 2017-04-26 WO PCT/CN2017/081983 patent/WO2018006637A1/en active Application Filing
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| CN103314314A (en) * | 2011-01-19 | 2013-09-18 | 日本电石工业株式会社 | Micro glass bead retroreflective sheet in which images having visible directivities are installed |
| CN103640530A (en) * | 2013-12-24 | 2014-03-19 | 曹庆发 | Reflective membrane with anti-counterfeiting mark, manufacture method of reflective membrane and anti-counterfeiting license plate |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN105957446B (en) | 2018-07-03 |
| CN108615454A (en) | 2018-10-02 |
| WO2018006637A1 (en) | 2018-01-11 |
| CN105957446A (en) | 2016-09-21 |
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Address after: 214000 Jiangsu city of Wuxi province Qian Rong Lu No. 88 Co-patentee after: SUZHOU SUDAVIG SCIENCE AND TECHNOLOGY GROUP Co.,Ltd. Patentee after: TRAFFIC MANAGEMENT Research Institute OF THE MINISTRY OF PUBLIC SECURITY Address before: 214000 Jiangsu city of Wuxi province Qian Rong Lu No. 88 Co-patentee before: SVG OPTRONICS, Co.,Ltd. Patentee before: TRAFFIC MANAGEMENT Research Institute OF THE MINISTRY OF PUBLIC SECURITY |
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Inventor after: Wei Guojun Inventor after: Dong Kui Inventor after: Wei Yukuan Inventor after: Yu Liying Inventor after: Chen Linsen Inventor after: Jiang Fan Inventor after: Fan Guangfei Inventor after: Li Xiaowu Inventor after: Lu Guo Inventor after: Weng Yufeng Inventor after: Zhou Yang Inventor before: Wei Guojun Inventor before: Chen Linsen Inventor before: Fan Guangfei Inventor before: Lu Guo Inventor before: Zhou Yang Inventor before: Wei Yukuan |