CH717948A2 - Moon phase indicator by rotating disc. - Google Patents

Abstract

The present invention relates to a display device for a timepiece representing the phenomenon of lunar libration thanks to at least one Moon mobile (110), at least one aperture (120) and at least one drive member. Said at least one Moon mobile (110) comprises a set of Moon phase representation comprising at least three Moon phases with a first surface, a second surface and/or a boundary configured to delimit said first surface and said second surface. Said at least one aperture (120) being configured to reveal said Moon phase representation set and said at least one drive member is configured to move said at least one Moon mobile (110) so as to represent the phenomenon of lunar liberation.

Description

Technical area

This application relates to the field of watchmaking and more particularly the representation of the phases of the Moon. Preferably, the present invention relates to a faithful representation of the phases of the Moon as a function of certain parameters and/or at the request of the user.

Technology background

[0002] Most moon phase indicators use an element on which is represented two whole moons rotating under a mask and appearing in an aperture. The angular position of the rotating Moons relative to the mask and window attempts to simulate the appearance of the Moon phase seen in the sky. This mechanism only gives a rough representation of it, especially for the growth and waning phases respectively after and before the half-moon.

[0003] In addition, over time, the curvature of the bright face of the moon remains constant on these moon phase indicators, in this case convex beyond the first quarter for example, instead of becoming concave as this is observable in reality.

[0004] Several models offer another concept which consists in representing different moon phases on a dial and using a retrograde hand to indicate the moon phase. It appears however that the representations of the phases of the Moon are static and very coarse because there are only 3 or 4 representations to illustrate the 28 phases of the Moon approximately.

[0005] Moreover, it would seem that the phenomenon of libration is totally absent in these representations, which is deplored by a large majority of amateurs.

Summary of the invention

The present invention aims to solve all or part of these drawbacks by means of a display device for a timepiece and preferably a timepiece, in particular for displaying a set of representation of phases of Moon reproducing the image of the Moon in the sky, preferably during the phenomenon of lunar libration; said display device being configured to operate according to at least a first primary operating mode and/or according to at least a first secondary operating mode and comprising at least one: Mobile Moon; said at least one Moon mobile comprising said Moon phase representation assembly; said moon phase representation set comprising at least three moon phases and each moon phase of said at least three moon phases being configured to present a first surface, a second surface and/or a boundary configured to delimit said first surface and said second surface; Ticket office ; said at least one aperture being configured to reveal said set of moon phase representations, preferably one moon phase of said at least three moon phases; and, Drive unit; said at least one drive member being configured to move said at least one Moon mobile along a first axis in said at least one first primary mode of operation and/or to move said at least one window along a second axis in at least a first secondary operating mode.

Thanks to this arrangement, the present invention makes it possible to represent different phases of the Moon reproducing as faithfully as possible the image of the Moon in the sky, in the northern hemisphere or in the southern hemisphere, as well as the evolution lunar areas visible from the Earth, i.e. the illuminated structures, i.e. the phenomenon of lunar libration.

[0008] According to one embodiment, said at least one Moon mobile is configured to be movable along said first axis between at least one first primary position and at least one second primary position in said at least one first primary operating mode and /or said at least one counter is configured to be movable along said second axis between at least one first secondary position and at least one second secondary position in said at least one first secondary operating mode.

[0009] Thanks to this arrangement, said Moon phase representation assembly represents the Moon in different hemispheres depending on the mode of operation.

According to one embodiment, said display device comprises a switching device configured to switch between said first primary operating mode and said first secondary operating mode.

[0011] Thanks to this arrangement, the user can switch between said first primary mode of operation and said first secondary mode of operation.

[0012] According to one embodiment, said at least one Moon mobile is configured to be mobile in at least a first primary direction in said at least one first primary mode of operation and/or said at least one window is configured to be movable in at least a first secondary direction in said at least a first secondary mode of operation.

[0013] According to one embodiment, said at least one Moon mobile is configured to be mobile in at least a second primary direction in said at least one first primary mode of operation and/or said at least one window is configured to be movable in at least a second secondary direction in said at least a first secondary mode of operation.

[0014] According to one embodiment, said at least one first primary direction is contrary to said at least one first secondary direction and/or said at least one second primary direction is contrary to said at least one second secondary direction.

[0015] Thanks to this arrangement, the different phases of the Moon reproduce the image of the Moon in the sky as well as the movement of the illuminated structures and the visible surface in the northern hemisphere and/or in the southern hemisphere.

According to one embodiment, said at least one drive member is configured to move said at least one Moon mobile between said at least one first primary position and said at least one second primary position in said at least one first primary operating mode and/or said at least one window between said at least one first secondary position and said at least one second secondary position in said at least one first secondary operating mode.

[0017] According to one embodiment, said at least one drive member is configured to move in a first primary direction said at least one Moon mobile from said at least one first primary position to said at least one second primary position in said at least one first primary mode of operation and/or to move in a second primary direction said at least one Moon mobile from said at least one second primary position to said at least one first primary position in said at least one first mode of primary operation.

According to one embodiment, said at least one drive member is configured to move in a first secondary direction said at least one window from said at least one first secondary position to said at least one second secondary position in said at least at least one first secondary mode of operation and/or to move said at least one window in a second secondary direction from said at least one second secondary position to said at least one first secondary position in said at least one first secondary mode of operation.

[0019] Thanks to one or other of these preceding arrangements, said at least one window and/or said at least one Moon mobile reproduces or reproduces the exact image of the Moon in the sky as well as the movement of the illuminated structures and the visible surface, in the northern hemisphere and/or in the southern hemisphere according to the latitude at which the observer is and for a given moment.

[0020]According to one embodiment, said display device comprises at least one control unit configured to control the movement of said at least one Moon mobile between said at least one first primary position and said at least one second primary position via said at least one drive member in said at least one first primary operating mode and/or of said at least one window between said at least one first secondary position and said at least one second secondary position via said at least one drive in said at least one first secondary mode of operation.

[0021] Thanks to this arrangement, said at least one control unit controls the positioning of said at least one window and/or of said at least one Moon mobile so as to reproduce the image of the Moon in the sky as well as the movement illuminated structures and the visible surface, in the northern hemisphere and/or in the southern hemisphere.

According to one embodiment, said at least one control unit is configured to receive a set of data; said data set includes at least: a date ; one o'clock ; and or a geographical position.

[0023] Thanks to this arrangement, said display device makes it possible to represent different phases of the Moon reproducing as faithfully as possible the image of the Moon in the sky as well as the movement of the illuminated structures and the visible surface, according to said set of data.

According to one embodiment, said at least one first primary position, said at least one second primary position, said at least one first secondary position and/or said at least one second secondary position is determined or are determined by the user and/or by said at least one control unit, preferably by said data set.

According to one embodiment, said set of data is received by said at least one control unit via radio frequency communication, via satellite geo-positioning, and/or via wired and/or light communication or said set of data is entered manually.

[0026] Thanks to one or other of these previous arrangements, said display device makes it possible to represent different phases of the Moon reproducing as faithfully as possible the image of the Moon in the sky as well as the movement of the illuminated structures. and the visible surface, at the request of the user and/or automatically by said at least one control unit.

According to one embodiment, said first axis and said second axis are coaxial.

[0028] According to one embodiment, said at least one mobile moon is configured to be moved in rotation around said first axis and/or said window is configured to be moved in rotation around said second axis.

[0029] Thanks to one or other of these previous arrangements, the mechanism of said display device is simplified to represent the different phases of the Moon.

[0030] According to one embodiment, said first surface is an opening in said at least one mobile moon, transparent or translucent, said second surface is opaque or translucent, said first surface is more transparent or more translucent than said second surface, and/or said first surface is lighter than said second surface.

According to one embodiment, said display device comprises a Moon representation configured to appear in said opening, through said first surface and/or through said second surface.

Thanks to one or other of these previous arrangements, the present invention makes it possible to represent different phases of the Moon reproducing as faithfully as possible the image of the Moon in the sky, in the northern hemisphere or in the hemisphere, as well as the evolution of illuminated structures and the visible surface.

According to one embodiment, said display device comprises at least one light source, said at least one light source being configured to illuminate, preferably through, said first surface and/or said second surface, and /or a reflective surface, such as a mirror, such as a white diffuse surface and/or a shiny stone.

Thanks to this arrangement, said display device represents the different phases of the Moon by reproducing as faithfully as possible the image of the Moon in the dark.

[0035] According to one embodiment, said first surface comprises a shiny, reflective, photoluminescent luminescent material, and/or barium sulphate, and/or said second surface comprises an opaque, photo-absorbent material, and/or carbon and/or carbon nanotubes.

[0036] Thanks to this arrangement, said display device represents the different phases of the Moon by reproducing the image of the Moon as faithfully as possible.

According to one embodiment, said delimitation comprises a radius of curvature, preferably said delimitation of each Moon phase of said at least three phases comprises a distinct radius of curvature best representing the actual shape of the terminator.

Thanks to this arrangement, said display device represents the different moon phases by reproducing as faithfully as possible the image of the different moon phases.

According to one embodiment, said Moon phase representation set is configured to represent the libration phenomenon of the Moon.

[0040] According to one embodiment, said moon phase representation assembly comprising at least twenty-eight moon phases.

[0041] Thanks to one or other of these previous arrangements, said display device reproduces the movement of the illuminated structures and the visualization of the different parts of the lunar surface at different times.

[0042] According to one embodiment, said display device comprises at least a second primary mode of operation, in which said at least one Moon mobile is stationary and/or at least a second secondary mode of operation, in which said at least one wicket is stationary.

According to one embodiment, said first surface, said second surface and/or said at least one light source comprises or comprises at least one relief such as a lunar crater.

Thanks to this arrangement, the present invention makes it possible to represent different phases of the Moon reproducing as faithfully as possible the image of the Moon in the sky.

The present invention relates to a watch comprising a display device according to at least one embodiment of the present invention.

Thanks to this arrangement, the present invention makes it possible to represent different phases of the Moon reproducing as faithfully as possible the image of the Moon in the sky, in the northern hemisphere or in the southern hemisphere, as well as the evolution illuminated structures, that is to say the phenomenon of lunar libration.

Brief description of figures

The invention will be described below in more detail using the accompanying drawings, given by way of non-limiting examples, in which: FIG. 1 illustrates at least one Moon mobile 110 according to one embodiment of the invention; FIG. 2 shows at least one window 120 according to one embodiment of the invention; FIG. 3 presents the different shapes and relative positions of each moon phase 116 of said set of moon phase representations 115 and of said at least one window 120 according to certain parameters and/or at the request of the user, according to an embodiment of the invention; FIGS. 4A, 4B and 7 show the implementation of said at least one Moon mobile 110 and of said at least one counter 120 according to a first embodiment; FIGS. 5A, 5B and 8 represent the implementation of said at least one Moon mobile 110 and of said at least one counter 120 according to a second embodiment; and, FIGS. 6A, 6B and 9 show the implementation of said at least one Moon mobile 110 and of said at least one window 120 according to a third embodiment.

Detailed description of the invention

[0048] There are watches comprising Moon phase indicators with an element on which is represented two whole Moons rotating under a mask and appearing in a window in a rough manner without being faithful in the phases of increase and decrease, nor for areas visible from the Earth, regardless of the position of the observer on the globe.

The present invention makes it possible to represent different phases of the Moon reproducing as faithfully as possible the image of the Moon in the sky, in the northern hemisphere or in the southern hemisphere, as well as the evolution of the illuminated structures and the visible surface.

[0050] Indeed, the present invention may relate to a watch comprising a display device 100 for a timepiece and preferably a timepiece. Said display device 100 is configured to display a set of Moon phase representations 115 reproducing the image of the Moon in the sky, and is configured to operate according to at least one operating mode among at least a first primary operating mode 150, at least a second primary operating mode159, at least one first secondary operating mode160 and/or at least one second secondary operating mode169.

[0051] A changeover between at least a first primary operating mode150, at least a second primary operating mode159, at least a first secondary operating mode160 and/or at least a second secondary operating mode169 is permitted thanks to a changeover device configured to switch between at least a first primary operating mode150, at least a second primary operating mode159, at least a first secondary operating mode160 and/or at least a second secondary operating mode169, so that the user can switch between at least one at least one first primary operating mode150, at least one second primary operating mode159, at least one first secondary operating mode160 and/or at least one second secondary operating mode169.

[0052] Said display device 100 may comprise at least one mobile Moon 110, at least one window 120 and at least one drive member 130 configured to move said at least one mobile Moon 110 and/or to move said at least one window 120.

Said at least one mobile Moon110, visible in Figure 1, may include said set of representation of phases of Moon115 mentioned above. Said Moon phase representation set 115 comprises at least three Moon phases and each Moon phase 116 of said at least three Moon phases is configured to present a first surface 118, a second surface 119 and/or a delimitation 117 configured to delimit said first surface 118 and said second surface 119. Said first surface 118 and/or said second surface 119 comprises or comprises at least one relief effect such as a lunar crater, and this either printed in 3D or microstructured or printed in 2D with shades of color so as to better represent the Moon.

[0054] Said delimitation 117 may be absent or merge with the curvature of the representation of the Moon during the full Moon and/or during the new Moon. Thus, said delimitation117 comprises a radius of curvature, preferably said delimitation117of each phase of the Moon116of said at least three phases comprises a distinct radius of curvature so that each phase of Moon116of said at least three phases reproduces as faithfully as possible the image of the corresponding phase .

According to the embodiments, said first surface 118 can be more transparent or more translucent than said second surface 119, and/or said first surface 118 can be lighter than said second surface 119. Furthermore, depending on the variants, said first surface 118 may be an opening in said at least one Moon mobile 110, be transparent or be translucent and/or said second surface 119 may be opaque or be translucent. In these embodiments, said display device 100 may include a representation of the Moon configured to appear in said aperture, through said first surface 118 and/or through said second surface 119. Said representation of the Moon can be static and can be found on a part of said watch, preferably on a portion of the dial of said watch.

Furthermore, said display device 100 can comprise at least one light source 140 configured to illuminate, preferably through, said first surface 118 and/or said second surface 119 and on which, that is to say on said at least one source of light140, can be said representation of the Moon. Thus, advantageously, said first surface 118, whether open, transparent or translucent, allows light to pass more easily than said second surface 119, which is rather opaque or less translucent, so that the different phases of the Moon reproduce the most faithfully possible the image of the Moon in the dark. It is also possible to replace said at least one light source 140 by a reflective surface, such as for example a mirror, a white diffuse surface and/or a shiny stone in order to obtain the same result.

[0057] It should be noted that although said first surface 118 can be open, transparent or translucent, these variants cannot be considered to be equivalent since an opening can have advantages that a transparent or translucent surface cannot offer. Indeed, it is possible, thanks to a laser, to make an opening in said second surface 119 so as to create said first surface 118 as well as said delimitation 117, and to avoid problems of alignment with said at least one light source 140, which can be arranged all around said at least one mobile Moon 110 as for example in the second and third embodiments, on the one hand and on the other hand, while said second surface 119 can increasingly limit the passage of light rays from said at least one light source140, over time, said first surface118, that is to say said opening, will remain unchanged and therefore will represent, over time, the different phases of the Moon by reproducing as faithfully as possible the image of the Moon in the sky. This is the case, for example, when the image of the Moon is printed on said at least one light source 140 and said second surface 119 hides all or part of the image of the Moon printed on said at least one light source 140, and said opening, although constant therefore will remain unchanged, will reveal the luminous part of the representation of the Moon, that is to say said first surface 118 which will evolve over time.

According to other variants, said first surface 118 can be closed, or solid as opposed to open, and can comprise a shiny, reflective, luminescent, photoluminescent, and/or barium sulphate material. It should be borne in mind that it is not excluded that said second surface 119 may be made of opaque or translucent material while being totally or partially covered with an opaque, photo-absorbing material, and/or carbon and/ or carbon nanotubes.

[0059] The attentive observer will notice that said Moon phase representation set115, illustrated in the present application, can comprise at least four Moon phases and up to twenty-nine, even thirty, Moon phases and can thus represent the phases of the Moon as finely as possible. To do this, said first surface 118 and said second surface 119, preferably in collaboration with said delimitation 117, present for each phase of the Moon different parts of the surface of the Moon observable in the sky and this at each phase.

Furthermore, said at least one Moon mobile 110 is configured to be movable along a first axis 111 between at least one first primary position 151 and at least one second primary position 152 in said at least one first primary operating mode 150 so that said phase representation set de Lune115can represent the Moon in different hemispheres depending on the mode of operation.

[0061] Said at least one window 120, meanwhile, is configured to reveal said set of Moon phase representations 115, preferably one Moon phase 116 of said at least three Moon phases, and is configured to be movable along a second axis 121 between at least one first secondary position 161 and at least one second secondary position 162 in said at least one first secondary operating mode 160. It should be noted that said first axis 111 and said second axis 121 can be coaxial or separate.

As mentioned above, said at least one drive member 130, shown in Figures 1 and 2, can move in a first primary direction 155 said at least one Moon mobile 110 from said at least one first primary position 151 to said at least one second primary position 152 in said at least one first primary mode of operation150and/or can move in a second primary direction156, which may be opposite to said first primary direction155, said at least one Moon mobile110from said at least one second primary position152to said at least one first primary position151in said at least one first primary mode of operation150.

[0063] Quite similarly, said at least one drive member 130 can also move in a first secondary direction 165 said at least one window 120 from said at least one first secondary position 161 to said at least one second secondary position 162 in said at least one first mode of secondary operation160and/or can move in a second secondary direction166, which may be contrary to said first secondary direction165, said at least one window120from said at least one second secondary position162to said at least one first secondary position161in said at least one first secondary operating mode160 . In the embodiments where said first axis 111 and said second axis 121 are separate, said at least one drive member 130 can be placed between said at least one window 120 and said at least one mobile Moon 110 and a disengageable gear system, well known to the skilled in the art, makes it possible to move said at least one mobile Moon110according to said first axis111, preferably in rotation around said first axis111, and/or to move said aperture120according to said second axis121, preferably in rotation around said second axis121. An alternative to this embodiment may provide two drive members 130, so that said at least one Moon mobile 110 and said at least one window 120 are moved independently.

As mentioned above, said display device 100 can be configured to operate according to said at least one second primary operating mode 159 and/or according to said at least one second secondary operating mode 169 . As can be seen in FIGS. 4A and 4B, said at least one Moon mobile 110 is stationary in said at least one second primary mode of operation 159 , whereas it is said at least one window 120 which is stationary in said at least one second mode of operation. secondary operation169, Figures 5A and 5B.

As illustrated in Figures 6A and 6B, the directions of mobility 155, 156, 165 165 of said at least one Moon mobile 110 and of said at least one window 120 in said at least one first primary operating mode 150 and/or in said at least one first mode secondary operating modes 160 can be respected in the third embodiment, since said at least one Moon mobile 110 and said at least one aperture 120 can be mobile simultaneously or independently, so that the different Moon phases reproduce the image of the Moon in the sky in the northern hemisphere and/or in the southern hemisphere.

This mobility of said at least one Moon mobile 110 and/or said at least one window 120 can be controlled by at least one control unit allowing the movement of said at least one Moon mobile 110 between said at least one first primary position 151 and said at least one second primary position152via said at least one drive member130in said at least one first primary operating mode150and/or of said at least one window120between said at least one first secondary position161and said at least one second secondary position162via said at least one drive member130in said at least at least a first secondary mode of operation160.

[0067] Said at least one control unit is configured to receive a set of data170 that may include at least one date171, at least one time172 and/or at least one geographical position173, preferably indicated by airport trigrams such as certain watches offering several time zones timetables, figure 3.

Indeed, according to the embodiments, said at least one first primary position151, said at least one second primary position152, said at least one first secondary position161 and/or said at least one second secondary position162 can be determined or can be determined by the user and/or by said at least one control unit via said set of data 170 which can be received by said at least one control unit via radio frequency communication, via satellite geo-positioning, and/or via wired communication and/or luminous or introduced manually so that the various phases of the Moon are reproduced as faithfully as possible and whether at the request of the user and/or whether automatically by said at least one control unit. Furthermore, it is not excluded to introduce the position or a latitude manually, for a mechanical watch for example, using a crown or a bezel.

One of the advantages offered by said at least one control unit is to make it possible to control the positioning of said at least one window 120 and/or of said at least one mobile Moon 110 so as to reproduce the image of the Moon in the sky as well as the movement of the illuminated structures, that is to say the phenomenon of lunar libration, in the northern hemisphere and/or in the southern hemisphere.

It is also possible, thanks to these arrangements, to represent different phases of the Moon reproducing as faithfully as possible the position, such as the elevation of the Moon in the sky.

First embodiment

In this first embodiment represented in FIGS. 4A and 4B, said display device 100 can operate according to said at least one first primary operating mode 150 and/or according to said at least one second secondary operating mode 169 .

Indeed, said at least one mobile Moon 110, visible in Figure 4A, can be rotatable along said first axis 111 between said at least one first primary position 151 and said at least one second primary position 152 in said at least one first mode of primary functioning150. Said at least one window 120, for its part, can be stationary according to said at least one second secondary mode of operation 169, FIG. 4B.

[0073] Without user request or modification of said set of data170, such as for example a modification of said at least one geographical position173, said at least one Moon mobile110, FIG. , along said first axis111between said at least one first primary position151and said at least one second primary position152in said at least one first primary operating mode150and said at least one window120remains stationary according to said at least one second secondary operating mode169, figure 7.

[0074] At the request of the user or according to said set of data170, if on 12.05, the user is for example in Zürich and is traveling in the southern hemisphere, or wishes to know what is the phase of the Moon in this hemisphere for example, said at least one control unit then moves said at least one Moon mobile110via said at least one drive member130, in said first primary direction155, from said at least one first primary position151to said at least one second primary position152or according to said second primary direction156, from said at least one second primary position152to said at least one first primary position151so as to pass from the first quarter of the Moon observable from ZRH to the first quarter of the Moon visible from EZE, figure 3. The user will see a part of said moon phase representation assembly 115 through said at least one window 120 immobile in said at least one second mode of operation condaire169.

Second embodiment

In this second embodiment represented in FIGS. 5A and 5B, said display device 100 can operate according to said at least one first secondary operating mode 160 and/or according to said at least one second primary operating mode 159.

Indeed, said at least one window 120, visible in Figure 5B, can be rotatable along said second axis 121 between said first secondary position 161 and said at least one second secondary position 162 in said at least one first secondary operating mode 160. Said at least one Moon mobile 110, for its part, can be stationary according to said at least one second primary operating mode 159, FIG. 5A.

[0077] Consequently, at the request of the user or according to said set of data170, if on 12.05, the user is for example in Zürich and is traveling in the southern hemisphere, or wishes to know what is the phase of Moon in this hemisphere for example, said at least one control unit then moves said at least one window120via said at least one drive member130, according to said first secondary direction165, from said at least one first secondary position161to said at least one second position secondary162or according to said second secondary direction166, from said at least one second secondary position162to said at least one first secondary position161, so as to pass from the first quarter of the Moon observable from ZRH to the first quarter of the Moon visible from EZE, figures 3 and 8. L the user will see scrolling, through said at least one window 120, a part of said Moon phase representation set 115 immobile in said at least a second primary mode of operation159.

Third embodiment

In this third embodiment represented in FIGS. 6A, 6B and 9, said display device 100 can operate according to said at least one first primary operating mode 150 and according to said at least one first secondary operating mode 160 .

To do this, said at least one mobile Moon110, visible in Figure 6A, can be rotatable along said first axis 111 between said at least one first primary position 151 and said at least one second primary position 152 in said at least one first mode primary operating mode 150 and said at least one window 120, visible in FIG. 6B, can be rotatable along said second axis 121 between said first secondary position 161 and said at least one second secondary position 162 in said at least one first secondary operating mode 160.

[0080] Consequently, at the request of the user or according to said set of data170, if on 12.05, the user is for example in Zürich and is traveling near the equator, or wishes to know what the phase of Moon in Indonesia, said at least one control unit then moves said at least one Moon mobile110via said at least one drive member130, according to said first primary direction155, from said at least one first primary position151to said at least one second primary position152or according to said second primary direction 156, from said at least one second primary position 152 to said at least one first primary position 151 so as to pass from the first quarter Moon observable at ZRH to the first quarter Moon visible at CGK. Simultaneously or offline, said at least one control unit also moves said at least one window 120 via said at least one drive member 130, in said first secondary direction 165, from said at least one first secondary position 161 to said at least one second position secondary162or according to said second secondary direction166, from said at least one second secondary position162to said at least one first secondary position161, so as to pass from the first quarter of the Moon observable at ZRH to the first quarter of the Moon visible at CGK, figures 3 and 9.

One of the major advantages of this embodiment is to be able to represent the shape of the terminator for all the different latitudes and as well as the orientation of the craters visible on the Moon.

Claims (16)

1. Display device (100) for a timepiece and preferably a timepiece, in particular for displaying a moon phase representation assembly (115) reproducing the image of the Moon in the sky, preferably with the phenomenon of lunar libration; said display device (100) being configured to operate according to at least a first primary operating mode (150) and/or according to at least a first secondary operating mode (160) and comprising at least one: - Mobile Moon (110); said at least one Moon mobile (110) comprising said Moon phase representation assembly (115); said moon phase representation assembly (115) including at least three moon phases and each moon phase (116) of said at least three moon phases being configured to have a first surface (118), a second surface (119) and/or a boundary (117) configured to bound said first surface (118) and said second surface (119); - Counter (120); said at least one window (120) being configured to reveal said moon phase representation set (115), preferably one moon phase (116) of said at least three moon phases; and, - Drive member (130); said at least one drive member (130) being configured to move said at least one Moon mobile (110) along a first axis (111) in said at least one first primary operating mode (150) and/or to move said at least one window (120) along a second axis (121) in at least a first secondary operating mode (160). 2. Display device (100) according to claim 1, in which said at least one mobile moon (110) is configured to be movable along said first axis (111) between at least a first primary position (151) and at least one at least one second primary position (152) in said at least one first primary operating mode (150) and/or said at least one window (120) is configured to be movable along said second axis (121) between at least one first position secondary (161) and at least one second secondary position (162) in said at least one first secondary operating mode (160). 3. A display device (100) according to claim 2, wherein said at least one mobile moon (110) is configured to be movable in at least a first primary direction (155) in said at least a first mode of operation primary (150) and/or said at least one counter (120) is configured to be movable in at least one first secondary direction (165) in said at least one first secondary operating mode (160). 4. Display device (100) according to any one of the preceding claims, which comprises at least one control unit configured to control the movement of said at least one Moon mobile (110) between said at least one first primary position ( 151) and said at least one second primary position (152) via said at least one drive member (130) in said at least one first primary operating mode (150) and/or said at least one window (120) between said at least one first secondary position (161) and said at least one second secondary position (162) via said at least one drive member (130) in said at least one first secondary operating mode (160). 5. A display device (100) according to claim 4, wherein said at least one control unit is configured to receive a set of data (170); said data set (170) comprises at least: - a date (171); - one hour (172); and or - a geographical position (173). 6. A display device (100) according to any preceding claim, wherein said at least one first primary position (151), said at least one second primary position (152), said at least one first secondary position ( 161) and/or said at least one second secondary position (162) is or are determined by the user and/or by said at least one control unit, preferably by said data set (170). 7. A display device (100) according to claim 5 or 6, wherein said set of data (170) is received by said at least one control unit via radio frequency communication, via satellite geo-positioning, and/or or via wired and/or light communication where said data set (170) is entered manually. 8. A display device (100) according to any one of the preceding claims 2 to 7, wherein said first axis (111) and said second axis (121) are coaxial. 9. Display device (100) according to any one of the preceding claims, wherein said first surface (118) is an opening in said at least one mobile moon (110), transparent or translucent, said second surface (119 ) is opaque or translucent, said first surface (118) is more transparent or more translucent than said second surface (119), and/or said first surface (118) is lighter than said second surface (119). 10. A display device (100) according to claim 9, which comprises at least one light source (140), said at least one light source (140) being configured to illuminate, preferably through, said first surface ( 118) and/or said second surface (119), and/or a reflective surface, such as a mirror, such as a white diffuse surface and/or a shiny stone. 11. A display device (100) according to any preceding claim, wherein said first surface (118) comprises a glossy, reflective, luminescent, photoluminescent, and/or barium sulphate material, and/or said second surface (119) comprises a matte, light-absorbing, carbon and/or carbon nanotube material. 12. Display device (100) according to any one of the preceding claims, in which said delimitation (117) comprises a radius of curvature, preferably said delimitation (117) of each moon phase (116) of said at least three phases includes a distinct radius of curvature. 13. A display device (100) according to any preceding claim, wherein said Moon phase representation assembly (115) is configured to represent the libration phenomenon of the Moon. 14. Display device (100) according to any one of the preceding claims, which comprises at least one second primary mode of operation (159), in which said at least one mobile moon (110) is stationary and/or at at least one second secondary operating mode (169), in which said at least one window (120) is stationary. 15. Display device (100) according to any one of the preceding claims, in said first surface (118), said second surface (119) and/or said at least one light source (140) comprises or comprises at least relief like a lunar crater. 16. Watch or clock comprising a display device (100) according to any one of the preceding claims.