WO2006082217A1

WO2006082217A1 - Displaying device for an interlaced printed item

Info

Publication number: WO2006082217A1
Application number: PCT/EP2006/050618
Authority: WO
Inventors: Yves Hansenne
Original assignee: Yves Hansenne
Priority date: 2005-02-03
Filing date: 2006-02-02
Publication date: 2006-08-10
Also published as: BE1016443A6

Abstract

The invention relates to a displaying device for an interlaced printed unit (17) comprising said interlaced printed unit (17), an optical lens (18) and a drive system (2) connected and arranged in such a way that said optical lens is driven in particular in the direction of translation movement.

Description

"INTERLACE PRINT DISPLAY DEVICE"

The present invention relates to a device for displaying an interlaced print comprising:

At least one interlaced print comprising a first printed side and a second side,

At least one optical lens, disposed against said first printed face of said at least one interlaced print,

• at least one first support, disposed against said second face of said interlaced print, and “at least one drive system.

There is generally known an interlaced print glued against a lens which makes it possible to view several images by varying the viewing angle of the observer. Indeed, depending on the relative movement of the observer and / or the device, a different image appears. Other devices as indicated above exist. For example, such a device is known from document US 6,226,906 which describes a system which moves an interlaced print behind a lens and which makes it possible to view several images without varying the angle of view of the observer. There are 3 common types of animated display, depending on the position of the observer relative to the animated display system.

Either the animated display is a lower animated display, i.e. the observer is located above the device, or the display is a random animated display, in this case, the observer is located anywhere relative to the level of the display, or else, the animated display is higher, that is to say that the observer is below the animated display device.

Unfortunately, the device of the US document is a lower animated device which does not allow the focal distance between the lens and the print to be properly respected. Indeed, the print is distorted under tensile or pushing forces. This results in poor visual quality.

The invention aims to overcome the drawbacks of the state of the art by providing a device for obtaining better visual quality without distortion of the image.

To solve this problem, there is provided according to the invention, a device as indicated at the start characterized in that said drive system is connected to and is arranged to drive said at least one optical lens, in particular according to a movement of translation. By moving the optical lens, the distortion of the image no longer occurs and the visual quality is directly improved.

Advantageously, the first support is inclined at an angle included, in a trigonometric coordinate system, in the range from 95 ° to 175 °, preferably from 100 ° to 135, and more preferably from an angle of approximately 105 °.

This device is therefore a lower display device which uses gravity. Indeed, gravity exerts a force perpendicular to the print and the support, therefore, the pressure exerted on the print is uniform and the focal distance is perfectly respected. In another particular embodiment according to the invention, said first support is a convex support against which said at least one lens is tensioned using tensioning means and in which said drive system is connected to the lens by the 'intermediate said tensioning means. This embodiment is particularly advantageous when used in arbitrary display devices. The resulting pressing force is uniform.

Those skilled in the art will understand from the above that the same result of uniform pressure force can be obtained if the pressure force is exerted by a deformation of the first support by the presence of a convex lens instead of the otherwise as mentioned above or the support is convex and deforms the lens to obtain a uniform pressing force.

Of course, the lens can be convex in the width or length direction or in any other direction other than the latter two, for example if the support is not a regular polygon.

The first support may have convexity in the width or length direction or in any other direction other than the latter two, for example if the support is not a regular polygon. Advantageously, said tensioning means are chosen from at least one elastic means, such as a spring or an elastic rubber, a counterweight means or any other means capable of exerting a tensile force and a restoring force, for example, a compressible material placed between the support and the print which would make the lens convex.

In a variant of the invention, if it is desired that the display be made above the observer, advantageously, the device according to the invention will also comprise a second transparent support, designed to be placed on the side of the lens opposite to the side directed towards said first support.

In another embodiment, it is also planned to use a second transparent support, for example when it is preferable, to reduce production costs, to reduce the thickness of the lens, and this in order to avoid curling of the lens. Advantageously, the first support and the second support have an inclination of an angle in the range from 5 ° to 85 °, preferably from 10 ° to 75, more preferably around 55 °.

The transparent support being much more rigid than the lens, the deformation of the materials will be minor and therefore, the pressure exerted on the image will be uniform and will be mainly due to the force of gravity of the weight of the device and the reaction force exerted by the second transparent support on the print.

In some improvements of the prior art, there are display devices in which a compressible material exerts pressure on the print, which improves the respect of the focal distance.

Unfortunately, this pressure is difficult to uniform, in particular because of the deformation of the materials.

To overcome this, the device according to the invention comprises a pressure regulating device, arranged to exert a uniform pressure on said second face of said at least one interlaced print.

Advantageously, the pressure regulating device is a gas pocket arranged between the support and said second face of said at least one interlaced print.

Since a gas tends to occupy all the space at its disposal, as soon as there is a deformation of any material, the gas fills this deformation and this makes it possible to maintain a uniform pressure over the entire surface of the printed. In addition, this gas pocket makes it possible to play a role as a pressure absorber, for example, in the case of irregularity in the support materials used. In a variant, the pressure regulating device is a compressible material arranged between the support and said second face of said at least one interlaced print. By compressible material is meant a material intended to trap a gas and there may be mentioned, by way of example, expanded materials, foams, sponge-like materials, textiles (fabric, wool, etc.).

Advantageously, the device according to the invention further comprises a lever and a pivot fixed to said first support, both arranged to ensure mutual adjustment of position between said at least one lens and said at least one interlaced print. This allows for adjustment of the lens and print and can help with phase adjustment. In Indeed, so that the cycle does not start between 2 images, it is necessary to provide an adjustment of phase of the lens compared to that of the support.

Consequently, the lever is fixed to the support by the pivot, the lens is fixed by at least one fixing means at a first end, the other end being free to allow adjustment. Of course, the reverse is also possible.

By fixing means is meant any type of fixing making it possible to fix a lever to a substantially flat surface, while maintaining a slight movement, allowing the pivot to play its role in the movement of the lever.

The lever makes it possible to modify the position of the lens, by moving the suspension point or support point. It is understood that the lever making it possible to modify the position of the lens may be the same as that mentioned previously or may be another lever. A person skilled in the art, on reading the above, will understand that a friction material can be provided to maintain the print in the chosen position.

The term “friction material” means any material having a non-negligible coefficient of friction, such as for example a material of the rubber type.

By suspension or support point of the lens is meant a drive point, which can also be the point of attachment or the pivot.

In a preferred embodiment, said drive system comprises a gear and a cam. More particularly, the drive system comprises a motor and a reduction gear, a shaft of which drives a cam, which cam drives a cam follower which is intended to be on the one hand in contact with said cam and on the other hand connected to said lens.

This helps maintain order in viewing the images. The term vision order is understood to mean any predetermined order imposed by the cam, which will be observed at each turn of the cam. Indeed, in the display device according to the invention, it is possible to design a device with three interlaced images in the printout, which will display the following sequence of images: image No. 1, image No. 2, the image n ° 3, image n ° 1, image n ° 3, image n ° 2, image n ° 1, etc. In fact, in the devices of the prior art, the order in which the images are displayed is a real problem. Indeed, the movement is of the sinusoidal type. So to go from the last image to the first image, it is necessary to go through the intermediate images in the reverse order of the previous movement. The order is thus reversed. It is also not possible in these prior art devices for each image to appear the same number of times.

In the invention described here, the return to the starting point is, for example, ensured by gravity. The result is a movement whose order is always respected. This cam also makes it possible to modify the display speed, by modifying the fulcrum of the cam follower. The speed is modified when the cam acts as a lever, by playing on the position of the pivot relative to the lever on the cam follower. One can also advantageously keep the order of the images by keeping part of the sinusoid, the return being effected by gravity or via an opposite direction force.

In the device according to the invention, the work of the motor can be relieved if a force opposite to the force of gravity is applied by means of a spring or a counterweight. This saves electrical energy, which can be particularly useful, especially if the device is powered by batteries or small accumulators.

It can also be advantageous to lubricate the print (the visual) and / or the lens in order to reduce the wear and the frictional forces and consequently, the engine work.

In a preferred embodiment, for an interlaced print with n interlaced images, said cam follower is provided for describe a trajectory along the circumference of said cam comprising:

a number x of circumferential parts, x being greater than or equal to n, each circumferential part having a predetermined radius, the number of different predetermined radii being at least equal to n,

- A number x of transition parts, each transition part connecting two consecutive circumferential parts.

Once the trajectory of the cam follower has been defined, and therefore the circumference of the cam has been designed, the planned order is respected each time. If on a cam turn, image 1 must be displayed three times and each time be followed by image 2 which will be followed by image 3, at each cam turn, this sequence will be repeated. In the case of an advertising display, it is also possible to conceive that one image remains longer or that another appears occasionally, for example, it is possible that image 1 is displayed each time between the image 2 and image 3, it will therefore be exposed twice as often.

Advantageously, the n images of the interlaced print are intended to be displayed at a speed which is all the greater as x is large. As mentioned above, the display of n images is very flexible and modular, it is possible to display the images a very large number of times and for a very short time, or to do the opposite. It all depends on the level of animation you want.

In a particular embodiment, each transition part connecting two consecutive circumferential parts has a predetermined length intended to be traversed by said cam follower during a passage from one image to another.

In this particular form of the invention, it is possible to greatly reduce or even eliminate the chained fade effect, by modifying the uniform displacement of the lens and therefore by reducing this predetermined length and by replacing the uniform displacement of the lens by a jerky movement in slots. The sinusoid becomes a signal periodic square and / or rectangle, or a periodic signal consisting of a plurality of squares and / or rectangle.

This characteristic results in that the more the predetermined length of the transition part will be great, the more the effect of crossfade between two images will be important. On the contrary, the smaller the predetermined length, the more rapid and clear the transition from one image to another. Of course, depending on the wishes of the user, both are possible, it is possible to provide a faded effect between a first image and a second image and a net transition effect from the second image to the third image.

Advantageously, the interlaced print is glued to a third support placed between said interlaced print and said first support.

In some cases, when the movement of the lens is imposed for a long period of time, it is possible that the print will move slightly since it is caused by friction by the movement of the lens. As the print is usually a flexible sheet, it is easily carried by the lens and this can cause a phase shift. To remedy this, provision has been made to stick it to a third support, for example a substantially rigid cardboard, a thin plastic or another type of support to prevent it from being able to be entrained by the movement of the lens. The bonding of the interlaced print on a third support prevents the displacement of the print which could completely phase the animation. This results in a very clear image sequence, without lag. It is also conceivable to provide one or more rivets which will connect all the layers together (first support, third support, printed matter, pressure regulating material, etc.). If the lens is also connected to the rest, provision should be made for the rivet to pass through substantially elongated orifices which will not prevent movement thereof for the animation of the display. Another advantage of the device according to the invention is that it can be integrated on existing supports. For example, it can be integrated on inclined supports, such as poster supports, drink or food dispensers. It can also be integrated on displays containing products, or product packaging, or on any other print medium, the print can even be the medium since it can be printed.

It is also possible to obtain a relief effect which would also be animated when the lenses are oriented vertically. In general, the phase and the amplitude of the movement must be such that the stage must correspond to the middle of the image. The square periodic signal must therefore be adapted to the number of images. A sinusoid is particularly suitable for 2 images. For three images, a sinusoid does not maintain the order in which the images are viewed.

The invention also relates to a drive system for a device for displaying an interlaced print.

Other characteristics, details and advantages of the invention will emerge from the description given below, without implied limitation and with reference to the attached drawings.

Figure 1 is a rear view of the display device of an interlaced print according to the invention, illustrating inter alia the drive system.

Figure 2 is a perspective view of the display device of an interlaced print according to the invention.

FIG. 3 is a schematic view of an image sequence of a device for displaying an interlaced print according to the invention.

Figures 4 a to d are particular embodiments of the cam of the drive system of the display device of an interlaced print according to the invention. In the figures, identical or similar elements have the same references.

Figure 1 illustrates a rear view of a display device of an interlaced print according to the invention. The display device for an interlaced print comprises at least a first support 1 and at least one drive system 2 connected to said at least one optical lens.

The display device further comprises a lever 3 and a pivot 4 fixed to said first support 1.

The drive system 2 is fixed on the first support 1 and comprises a motor and a reduction gear, both represented schematically by the housing 5, a shaft of which drives a cam 6. The cam 6 drives a cam follower 7 which is provided to be on the one hand in contact with said cam 6 and on the other hand connected to said lens by means of a rivet 8. The cam follower is designed to transform a circular movement of cam 6 into a movement of translation which is transmitted to the lens via a support point 9, movable in a guide means 10. The part of the cam follower 7 in contact with the cam 6 comprises a protrusion 1 1 which is provided for slide on the circumference of the cam 6. For flexibility, it is possible to change the cam 6 when the number of images or the sequence of images desired differs. Therefore, the protrusion 1 1 must be able to be placed on the cam follower 7 in an adjustable and adjustable manner. Therefore, the protrusion 1 1 is slidably mounted in a guide groove 12 and can be held in place for example by a butterfly screw. Similarly, the elements of the drive system must be able to be moved in order to be adaptable to larger or smaller systems, the cams must be able to be interchanged, etc. Therefore, a series of grooves 13 for adjusting the size or position of the elements are provided. In addition, an elastic element 14 keeps contact between the cam follower 7, more particularly between the protuberance 1 1 and the cam 6. In fact, when the radius of a circumferential part 15 is reduced, it is necessary to maintain contact between the cam follower 7 and the cam 6. For this purpose, the elastic element 14 returns the protuberance 1 1 against the cam 6, even when the radius of a circumferential part varies suddenly. The cam 6 comprises a number x of circumferential parts 15. In the example illustrated, the number x is 9, the print, not illustrated in FIG. 1 includes 3 interlaced images. The x circumferential parts 15 are each separated from a transition part 16. Since the number x is equal to 9, this means that each image of the printout will be displayed three times per cam turn 6. The number of predetermined rays different from the parts circumferential is n and therefore in the above example 3.

For an interlaced print with n interlaced images, said cam follower 7 is provided to describe a trajectory along the circumference of said cam 6 comprising:

a number x of circumferential parts 15, x being greater than or equal to n, each circumferential part 15 having a predetermined radius, the number of different predetermined radii being at least equal to n,

a number x of transition parts 16, each transition part 16 connecting two consecutive circumferential parts 15.

As mentioned previously, the n images of the interlaced print are intended to be displayed at a speed which is all the greater as x is large. Per cam turn 6, the minimum number of appearances for each image is 1. In a particular embodiment, each transition part 16 connecting two consecutive circumferential parts 15 has a predetermined length intended to be traversed by said cam follower 7 during a passage from one image to another.

The larger the predetermined length of the transition portion 16, the more the crossfade effect between the images will be important. The more this predetermined length is small, the more the passage from one image to another is fast and clear, even jerky.

FIG. 2 illustrates an exploded perspective view of the interlaced display device according to the invention. The display device according to the invention therefore comprises the first support 1 on which the drive means 2 are fixed, at least one interlaced print 17 comprising a first printed face and a second face, and at least one optical lens 18, disposed against said first printed face of said at least one interlaced print. The first support 1 is preferably disposed against said second face of said interlaced print 17. The drive system 2 is connected to the optical lens 18 for example by means of a rivet 9 so that the movement transmitted by the cam 6 from the motor 5 to the cam follower 7 can also be transmitted to the optical lens 18, in particular in a translational movement. To this end, the guide groove 10 allows the movement of the lens 18 thanks to a movement of the rivet 9.

As also mentioned previously, the device according to the invention comprises a lever 3 and a pivot 4. The lever 3 and the pivot 4 are both arranged to ensure mutual adjustment of position between said at least one lens 18 and said at least one interlaced print 17.

In a particular embodiment, said first support 1 is a convex support 1 against which the lens 18 is tensioned using tensioning means 8, 19. In a variant, the drive system 2 is connected to the lens 18 by means of said tensioning means 8. For example, the tensioning means 8,19 may be a screw and in the case where the first support 1 is slightly smaller in size than the lens 18, the fact of fixing them together to a end on either side (in width or in length) will make the lens 18 convex and maintain it in this shape, which will allow perfect contact between the lens and the print and therefore excellent visualization of the various interlaced images. In a variant; the tensioning means 8, 19 are chosen from at least one elastic means, such as a spring or an elastic rubber, a counterweight means or any other means capable of exerting tension and a return. The display device according to the invention also comprises a pressure regulating device 20, arranged to exert a uniform pressure on the second face of the interlaced print 17. The pressure regulating device is in some cases a gas pocket arranged between the support 1 and the interlaced print 17. In other cases, the pressure regulating device 20 is a compressible material, designed to trap a gas, arranged between the support 1 and the interlaced print 17.

In certain embodiments, as mentioned previously, the device can be an upper device or a lower device. In these embodiments, provision is made for the first support to be inclined at an angle included, in a trigonometric coordinate system, in the range from 95 ° to 175 °, preferably from 10 ° to 135 ° and more preferably from an angle of approximately 11 ° or else the first support has an inclination of an angle in the range from 5 ° to 85 °, preferably from 10 ° to 75 °, more preferably around 55 °. In the case where a second support is present, to be placed in front of the lens 18, for example to use less expensive and finer lenses, the first 1 and the second support will have similar inclinations, whatever the inclination of the device chosen. In other embodiments, it may be desirable for the interlaced print 17 to be glued to a third support 21 placed between the interlaced print 17 and the first support 1.

Alternatively, it is also expected that the first support 1 on which the drive system 2 is placed is much narrower than the display device (see Figure 1). Indeed, the support 1, on which the drive system 2 is placed, must be substantially rigid so as not to deform during the movement of the cam 6. On the other hand, the device must generally be able to be suspended, it will therefore be preferable to lighten this more rigid part 1 therefore necessarily heavier. In this case, a second first support 1a which advantageously has a width similar to that of the interlaced print 17 and that of the lens 18 will be placed between the first support 1 on which the drive system 2 is placed and the pressure regulator 20.

If one wants a convexity in a direction other than that obtained by stretching the lens between the tensioning elements 8 and 19, it is possible to place tensioning elements 22. The grooves 23 on the lens 18 will have a U shape, because it must be possible to adjust the phase by means of the lever 4 and the pivot 3, even if the tensioning elements 22 are present. As can be seen in FIG. 3, an interlaced print 17 comprises several superimposed images which are called interlaced images. When the interlaced print 17 is placed in the display device according to the invention, for example, the image sequence A, B and C can be observed. In the case of a cyclic display, the sequence A, B, C, A, B, C, A, B, C, ... will be displayed. Of course all the variants of this sequence, within the same cycle can be observed. One cycle corresponds to one cam revolution 6.

FIGS. 4 illustrate different configurations of cam circumference 6. The images observed when the cam follower 7 is on a particular circumferential part 15 of the cam 6, are by way of example, represented by Roman numerals I, II and III, the same as those represented in FIG. 3.

In FIG. 4a, for an interlaced print comprising two images, for example the sun (I) and the moon (II), the drawn cam makes it possible to obtain a display of the sun and the moon during the same interval of time since the lengths of the arcs of the circumferential parts are identical. In detail, when the projection 1 1 of the cam follower 7 is in contact with the circumferential part 15 (I) of the cam 6, the sun is displayed, the cam being in rotation, the cam follower will then be in contact with the transition part 16 (I), in this case, the image of the sun changes to the image of the moon (II). The steeper the slope of the transition part 16 (I), the sharper the change and the less there is fade. When the projection 1 1 of the cam follower 7 is in contact with the circumferential part 15 (II) of the cam 6, the moon is displayed, the cam being always in rotation, the cam follower 7 will then be in contact with the transition part 16 (II), in this case, the image of the moon changes to the image of the sun.

The cam 6 illustrated in FIG. 4b operates on exactly the same principle except that the time interval during which the sun (I) is displayed is longer than the time interval during which the moon (II) is displayed.

The cam 6 illustrated in FIG. 4c applies to an interlaced print comprising 3 images, for example a sun (I) a moon (II) and a star (III). On a cam turn 6, each image is represented 4 times. Of course this multiplier number can be much lower or much higher, all combinations being possible. According to the design of the cam, each image is intended to be displayed during the same time interval, the lengths of the arcs of the circumferential parts are all equal to each other. Of course, all variations are also possible. The images are also intended to be displayed each the same number of times and the symmetry of the cam makes it possible to reproduce each time an identical sequence. More particularly, on a cam turn, the following sequence is observed: sun, moon, star, sun, moon, star, sun, moon, star and again sun, moon, star. Of course, in certain applications, it may be advantageous that the sun be replaced, by way of nonlimiting example, by a product for sale, the moon by the product in function and the star by the price of the product.

In detail and in operation, when the projection 1 1 of the cam follower 7 is in contact with the circumferential part 15 (I) of the cam 6, the sun is displayed, the cam being in rotation, the cam follower will then be in contact with the transition part 16 (I), in this case, the image of the sun changes to the image of the moon (II). The steeper the slope of the transition part 16 (I), the sharper the change and the less there is fade. When the projection 1 1 of the cam follower 7 is in contact with the circumferential part 15 (II) of the cam 6, the moon is displayed, the cam being always in rotation, the cam follower 7 will then be in contact with the transition part 16 (II), in this case, the image of the moon changes to the image of the star (III). When the protrusion 1 1 of the cam follower 7 is in contact with the circumferential part 15 (III) of the cam 6, the star is displayed, the cam being always in rotation, the cam follower 7 will then be in contact with the transition part 16 (III), in this case, the image of the star changes to the image of the sun, and the cycle resumes as above. This happens four times for a cam turn 6.

In FIG. 4b, the order of the images is not a repeated sequence, and the display times as well as the numbers of appearance of each image are different.

The operation is identical to what has been described above, except that the sequence is as follows (start indicated by an arrow): sun, star, moon, sun, star, moon, sun, moon, star and the cycle starts again ... As we can easily see, some images remain displayed for a long time compared to others, which could be particularly advantageous when in the context of an advertising campaign we want to emphasize a characteristic more than on the price for example. Other embodiments of the device according to the invention are indicated in the appended claims. It is understood that the present invention is in no way limited to the embodiments described above and that many modifications can be made thereto without departing from the scope of the appended claims. For example, it is also within the scope of the invention that the drive system comprises a stepping motor controlled by electronic components well known to those skilled in the art or even a solenoid. Of course all the drive systems capable of being adapted on a display device of an interlaced print according to the invention are also included in the claimed protection.

List of references

1. first support

1 bis. Second first support

2. drive system 5 3. lever

4. pivot

5. motor and reduction gearbox

6. cam

7. cam follower

10 8. medium tensor, for example a rivet

9. support point, for example a rivet

10. means of guiding the fulcrum

1 1. protuberance

12. guide groove

15 13. size or position adjustment grooves

14. elastic element

15. circumferential part

16. transition part

17. interlaced print 20 18. optical lens

19. medium tensor

20. pressure regulating device

21. third support

22. tensor elements 25 23. lens grooves

Claims

1. Display device for an interlaced print (17) comprising

At least one interlaced print (17) comprising a first printed side and a second side,

At least one optical lens (18), disposed against said first printed face of said at least one interlaced print (17),

• at least one first support (1), disposed against said second face of said interlaced print (17), and • at least one drive system (2), characterized in that said drive system (2) is connected to and is arranged to drive said at least one optical lens (18), in particular in a translational movement.

2. A device for displaying an interlaced print (17) according to claim 1, wherein the first support (1) is inclined at an angle included, in a trigonometric reference, in the range from 95 ° to 175 ° , preferably from 100 ° to 135 ° and more preferably from an angle of about 1 15 °.

3. A device for displaying an interlaced print (17) according to claim 1 or 2, wherein said first support (1) is a convex support against which said at least one lens (18) is stretched using tensioning means (8,19) and wherein said drive system (2) is connected to the lens via said tensioning means (8,19).

4. Device for displaying an interlaced print (17) according to claim 3 wherein said tensioning means (8,19) are chosen from at least one elastic means, such as a spring or an elastic rubber, a means of counterweight or any other means likely to exert tension and recall.

5. Device for displaying an interlaced print (17) according to any one of claims 1 to 4 further comprising a second transparent support, intended to be disposed on the side of the lens (18) opposite the side directed towards said first support (1).

6. A device for displaying an interlaced print (17) according to claim 5 wherein said first support (1) and said second support have an inclination of an angle in the range from 5 ° to 85 ° preferably from 10 ° to 75 ° more preferably around 55 °

7. Device for displaying an interlaced print (17) according to any one of the preceding claims, further comprising a pressure control device (20), arranged to exert a uniform pressure on said second face of said at least one print. interlaced (17).

8. Device for displaying an interlaced print (17) according to claim 7 wherein the pressure regulating device (20) is a gas pocket arranged between the first support (1) and said second face of said at least one interlaced print (17).

9. Display device for an interlaced print according to claim 7 wherein the pressure regulating device (20) is a compressible material (20) arranged between the first support (1) and said second face of said at least one print interlaced (17).

10. A device for displaying an interlaced print (17) according to any one of the preceding claims further comprising a lever (3) and a pivot (4) fixed to said first support, both arranged to ensure a mutual adjustment of position between said at least one lens (18) and said at least one interlaced print (17).

1 1. Device for displaying an interlaced print (17) according to any one of the preceding claims, in which said drive system (2) comprises a motor (5) and a reduction gear (5), a shaft of which drives a cam (6), which cam (6) drives a cam follower (7) which is intended to be on the one hand in contact with said cam (6) and on the other hand connected to said lens (18).

12. Device for displaying an interlaced print (17) according to claim 1 1, in which, for an interlaced print (17) with n interlaced images, said cam follower (7) is designed to describe a trajectory along of the circumference of said cam (6) comprising: - a number x of circumferential parts (15), x being greater than or equal to n, each circumferential part (15) having a predetermined radius, the number of different predetermined radii being at least equal to n,

- a number x of transition parts (16), each transition part

(16) connecting two consecutive circumferential parts (15).

13. An interlaced print display device (17) according to claim 12, in which the n images of the interlaced print (17) are intended to be displayed at a speed which is all the greater as x is tall.

14. A device for displaying an interlaced print (17) according to claim 12 or 13, in which each transition part (16) connecting two consecutive circumferential parts (15) has a predetermined length intended to be traversed by said follower of cam (7) when switching from one image to another.

15. Device for displaying an interlaced print (17) according to one of the preceding claims, in which said interlaced print

(17) is glued to a third support (21) placed between said interlaced print (17) and said first support (1).

16. Drive system (2) for a device for displaying an interlaced print (17) comprising a motor (5) and a reduction gear (5), a shaft of which drives a cam (6), which cam (6) drives a cam follower (7) which is intended to be on the one hand in contact with said cam (6) and on the other hand connected to a lens (18) disposed on said interlaced print (17).

17. Drive system (2) for an interlaced print display device (17) according to claim 16, wherein, for an interlaced print (17) with n interlaced images, said cam follower (7) is intended to describe a trajectory along the circumference of said cam (6) comprising:

a number x of circumferential parts (15), x being greater than or equal to n, each circumferential part (15) having a predetermined radius, the number of different predetermined radii being at least equal to n,

- A number x of transition parts (16), each transition part (16) connecting two circumferential parts (15) consecutive.

18. Drive system (2) for an interlaced print display device (17) according to claim 17, in which the n images of the interlaced print (17) are intended to be displayed at a speed which is the greater the greater that x is.

19. Drive system (2) for an interlaced print display device (17) according to claim 17 or 18, wherein each transition part (16) connecting two consecutive circumferential parts (15) has a predetermined length intended to be traversed by said cam follower (7) when passing from one image to another.