EP4266133A1 - Watch comprising a solar cell - Google Patents
Watch comprising a solar cell Download PDFInfo
- Publication number
- EP4266133A1 EP4266133A1 EP22169468.0A EP22169468A EP4266133A1 EP 4266133 A1 EP4266133 A1 EP 4266133A1 EP 22169468 A EP22169468 A EP 22169468A EP 4266133 A1 EP4266133 A1 EP 4266133A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- intermediate part
- glass
- transparent
- seal
- solar cell
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000011521 glass Substances 0.000 claims abstract description 66
- 239000000463 material Substances 0.000 claims abstract description 43
- 239000012780 transparent material Substances 0.000 claims description 13
- 125000006850 spacer group Chemical group 0.000 claims description 5
- 230000002093 peripheral effect Effects 0.000 claims description 4
- 230000000873 masking effect Effects 0.000 claims description 3
- 239000002184 metal Substances 0.000 description 8
- 239000003292 glue Substances 0.000 description 5
- 238000005520 cutting process Methods 0.000 description 4
- 239000000919 ceramic Substances 0.000 description 3
- 241001639412 Verres Species 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000001228 spectrum Methods 0.000 description 2
- 239000000758 substrate Substances 0.000 description 2
- RIBGNAJQTOXRDK-UHFFFAOYSA-N 1,3-dichloro-5-(3-chlorophenyl)benzene Chemical compound ClC1=CC=CC(C=2C=C(Cl)C=C(Cl)C=2)=C1 RIBGNAJQTOXRDK-UHFFFAOYSA-N 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 238000004040 coloring Methods 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000005357 flat glass Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 230000000284 resting effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G04—HOROLOGY
- G04G—ELECTRONIC TIME-PIECES
- G04G19/00—Electric power supply circuits specially adapted for use in electronic time-pieces
-
- G—PHYSICS
- G04—HOROLOGY
- G04C—ELECTROMECHANICAL CLOCKS OR WATCHES
- G04C10/00—Arrangements of electric power supplies in time pieces
- G04C10/02—Arrangements of electric power supplies in time pieces the power supply being a radioactive or photovoltaic source
-
- G—PHYSICS
- G04—HOROLOGY
- G04B—MECHANICALLY-DRIVEN CLOCKS OR WATCHES; MECHANICAL PARTS OF CLOCKS OR WATCHES IN GENERAL; TIME PIECES USING THE POSITION OF THE SUN, MOON OR STARS
- G04B37/00—Cases
- G04B37/08—Hermetic sealing of openings, joints, passages or slits
-
- G—PHYSICS
- G04—HOROLOGY
- G04B—MECHANICALLY-DRIVEN CLOCKS OR WATCHES; MECHANICAL PARTS OF CLOCKS OR WATCHES IN GENERAL; TIME PIECES USING THE POSITION OF THE SUN, MOON OR STARS
- G04B39/00—Watch crystals; Fastening or sealing of crystals; Clock glasses
- G04B39/002—Watch crystals; Fastening or sealing of crystals; Clock glasses made of glass
-
- G—PHYSICS
- G04—HOROLOGY
- G04G—ELECTRONIC TIME-PIECES
- G04G17/00—Structural details; Housings
- G04G17/02—Component assemblies
-
- G—PHYSICS
- G04—HOROLOGY
- G04G—ELECTRONIC TIME-PIECES
- G04G17/00—Structural details; Housings
- G04G17/08—Housings
Definitions
- the invention relates to the field of watches equipped with at least one solar cell. More particularly, the invention relates to a watch having as an electrical power source a solar cell arranged at least mainly between the movement incorporated in a box and the glass of this box covering an analog time display and behind a part annular, in particular a spacer or a flange, laterally surrounding the analog display, this annular part being at least partly transparent or translucent and arranged so as to allow light passing through the glass to reach the solar cell.
- the documents EP 3093717 And JP 6474326 describe watches as defined in the field of the invention above.
- the watch case comprises a bezel middle having an annular part projecting relative to an interior wall of the middle and forming a shoulder on which the edge of the glass rests.
- This annular part is provided in the material of the bezel middle, this material being generally opaque, in particular a metal or ceramic.
- the document shows JP 6474326 comprises a conventional seal which is arranged at the periphery of the glass between a side surface of this glass and a vertical wall of the box.
- the document EP 3093717 does not represent such a seal, but this certainly results from a simplified drawing.
- the watches described in these two documents have an intermediate part laterally surrounding the analog display and a solar cell extending mainly axially between the movement and the glass, behind the intermediate part relative to the analog display.
- This intermediate part is formed by a material which allows passage to less partially light (this material therefore defining a transparent or translucent medium, that is to say a non-opaque medium) and being configured in such a way as to allow visible and/or infrared light, which passes through the glass and arrives in the space of the analog display, to propagate in the transparent or translucent material and then to reach the solar cell.
- the solar cell is arranged in a region located radially beyond the periphery of the glass.
- the present invention aims to increase the quantity of light that can be received by the solar cell in a watch having a solar cell arranged mainly behind an intermediate part made of transparent or translucent material and surrounding the analog display or, alternatively, to allow the production of a watch having a solar cell arranged radially behind such an intermediate part while maintaining an opaque appearance, in particular metallic, for an observer looking at the interior surface of this intermediate part through the watch glass, while ensuring that the solar cell receives enough light to enable it to power all or part of the movement incorporated in the watch.
- the second objective relates to the aesthetic aspect of a watch having a solar cell arranged behind an intermediate part laterally delimiting the space of the analog display, in particular a watch whose case is made of metal or ceramic.
- the invention relates to a watch comprising a case, a movement provided with an analog display and defining a main axis of the case which is orthogonal to the general plane of this case, a glass located above the display analog, a seal arranged at the periphery of the glass between a lateral surface of this glass and an axial wall of the box, an intermediate part laterally surrounding the analog display, a solar cell (understanding its active zone capturing the visible and/or infrared light) extending at least mainly between the movement and the glass and being arranged behind the intermediate part relative to the analog display.
- the intermediate part is formed at least partially by a transparent or translucent material and is configured so as to allow visible and/or infrared light passing through the glass from outside the watch to propagate in said transparent or translucent material and then reach the solar cell.
- This solar cell is arranged in a region located radially beyond the periphery of the glass. Then, the intermediate part defines a radial surface forming an axial stop for a peripheral zone of the glass internally running along its periphery.
- the seal is also formed at least mainly by a transparent or translucent material which defines at least mainly an axial surface against which the lateral surface of the glass presses.
- the seal forms with the outer part of the intermediate part a continuous medium or is arranged axially contiguous to this outer part or is separated axially from this outer part at least for the most part by a transparent intermediate medium or translucent, the seal being configured so as to allow visible and/or infrared light incident on its axial surface or on its upper surface to propagate in the transparent or translucent material which forms it to a surface lower geometric or lower surface delimiting the seal below.
- the outer part of the intermediate part is arranged so as to be able to substantially collect visible and/or infrared light passing through the lower geometric surface or lower surface of the seal and to allow this collected visible and/or infrared light to propagate in the transparent or translucent material of the intermediate part and then reaching at least partly the solar cell.
- the seal is made of material with at least one exterior part of the intermediate part and it forms with this at least one exterior part a single part consisting of the same transparent or translucent material.
- the seal is made integrally with the intermediate part and forms with this intermediate part a single piece made of the same transparent or translucent material.
- the intermediate part comprises an interior part delimiting a space for the analog display, this interior part comprising a translucent diffuser defining the interior surface of the intermediate part visible through the glass.
- this interior part comprising a translucent diffuser defining the interior surface of the intermediate part visible through the glass.
- at least one exterior part of the intermediate part is made of a transparent material.
- the intermediate part comprises an interior part delimiting a space for the analog display, this interior part comprising a semi-transparent film defining the interior surface of the intermediate part visible through the glass, this semi-transparent film being arranged so as to partially allow incident light to pass from the space reserved for the analog display while masking the solar cell for a user viewing, under normal light conditions, said interior surface through the glass.
- the semi-transparent film is arranged so as to present a metallic appearance on the side of said space for the user looking at the interior surface of the intermediate part through the glass.
- the radial surface of the intermediate part is at least mainly defined by the transparent or translucent material forming this intermediate part, which is arranged in such a way as to allow visible and/or infrared light passing through the radial surface to propagate in the transparent or translucent material forming the intermediate part and then reach at least partly the solar cell.
- the intermediate part has a lower surface which is covered by a reflective layer, this intermediate part forming a transparent or translucent medium between at least the lower geometric surface or lower surface of the seal and the reflective layer.
- a first embodiment is shown in Figures 1 to 6 .
- the watch 2 comprises a box 4, a movement 6 provided with an analog display 8 and defining a main axis 10 of the box, orthogonal to the general plane of this box which is parallel to the dial 12, a glass 14 located above the analog display 8, a part 16 forming in its upper part a seal 18 arranged at the periphery of the glass between a side surface 22 of this glass and an upper vertical wall 24 of the box. Part 16 also forms an intermediate part 20 laterally surrounding the analog display and located between the glass and the dial.
- the watch 2 also comprises a solar cell 30 extending between the movement 6 and the glass 14 and being arranged behind the intermediate part 20 relative to the analog display 8.
- the solar cell 30 comprises an active zone 32 and a connection zone 33 arranged below the active zone, this connection zone comprising an annular track 31 located on the interior side and forming a first electrode of the solar cell.
- the second electrode is formed by a very thin metal substrate located on the exterior side of the solar cell, behind a photosensitive silicon layer deposited on this metal substrate.
- the active zone of the solar cell is constituted by its upper part which extends from the annular track 31, the separation line between the active zone and the connection zone being defined by the upper edge of the annular track.
- the solar cell 30 is arranged in a region located radially beyond the periphery of the glass 14, defined by the lateral surface 22, in a recess 28 forming a circular, shallow housing in the box 4 for this solar cell 30, which is thus located slightly set back from the upper vertical surface 24 of the box.
- the solar cell has two lateral parts which extend in a generally horizontal plane respectively on both sides of a connector 34, which electrically connects the solar cell to an electronic module comprising a PCB 36, on which is soldered or glued (using a conductive glue) the connector, and a voltage booster 38 which powers a battery or a rechargeable storage capacity.
- the solar cell 30 has a certain elasticity so that it remains in position in the circular housing 28 once installed in this housing. Then, the length of the two lateral parts is provided so that the cell covers substantially the entire bottom of the recess 28, preferably by having the two respective ends of these two lateral parts which overlap a little in a diametrically opposite to that of connector 34. Note that a glue point can be provided between the two superposed ends. It is also possible to provide glue at least partially on the back of the solar cell so that it is stuck to the bottom of housing 28.
- the intermediate part 20 is formed by a translucent material and is configured so as to allow visible and/or infrared light passing through the glass 14 from outside the watch to propagate in the translucent material and then reach the solar cell 30.
- the intermediate part 20 defines a radial surface 42 forming an axial stop for a peripheral zone 15 of the glass internally running along its periphery.
- We define for the intermediate part an exterior part 46, in the vertical extension of the seal, and an interior part 48 (separated at the Figure 5 by a geometric line 52) which forms the radial surface supporting the glass.
- the seal 18 is also formed by a translucent material which defines an axial surface 44 against which the lateral surface 22 of the glass presses.
- the seal here forms a continuous translucent medium with the outer part 46 of the intermediate part 20 and is configured so as to allow visible and/or infrared light incident on its axial surface 44 and/or on its upper surface 45 to propagate in the translucent material which forms it to a lower geometric surface 50 delimiting the seal below.
- the intermediate part, in particular the outer part 46 thereof, is arranged so as to be able to substantially collect visible and/or infrared light passing through the lower geometric surface 50 of the seal and to allow this visible and/or infrared light to pass through the lower geometric surface 50 of the seal.
- the seal sealing 18 is integral with the intermediate part 20 and forms with this intermediate part a single piece 16 which is made of the same translucent material.
- the arrangement of the translucent part 16 allows visible and/or infrared light incident on the interior axial surface 44 and on the upper surface 45 of the seal 18, formed by this part 16, to propagate in the translucent material which forms it and then in the intermediate part 20, in particular in its exterior part 46, until 'to the solar cell 30, which is configured and arranged in the box 4 so as to be able to capture this visible and/or infrared light, in particular that corresponding to the maximum of the light spectrum effectively captured by the solar cell.
- the part 16 is made of a transparent material, that is to say forming a transparent medium for at least a useful part of the spectrum bright visible and/or infrared light.
- the interior surface of the intermediate part is made opaque, semi-transparent or translucent for an observer who looks at this interior surface through the glass, so as to give a more classic appearance to the watch.
- the radial surface 42 of the intermediate part 20 is at least mainly defined by the translucent material forming this intermediate part, more particularly its interior part, or, in the particular variant mentioned above, by the transparent material forming the intermediate part, more particularly its interior part. This makes it possible to increase the quantity of light incident on the upper face of the watch which can reach the solar cell 30.
- the radial surface 42 of the intermediate part 20, forming an axial stop for the glass which generally rests on this radial surface is entirely defined by the translucent material forming the intermediate part 20, more particularly its interior part 48.
- the radial surface 42 is almost entirely or mainly defined by the translucent or transparent material forming the intermediate part, only a film or an internal annular part, defining an interior zone of the radial surface, not being translucent or transparent.
- the radial surface of the intermediate part is therefore at least mainly defined by the transparent or translucent material forming this intermediate part, which is arranged in such a way as to allow visible and/or infrared light passing through the radial surface to propagate in the transparent or translucent material forming the intermediate part and then reach at least partly the solar cell.
- the intermediate part 20 forms a spacer between the glass 14 and the dial 12, that is to say it defines, possibly with an additional lower reflective layer or sheet if necessary, the spacing between the dial and the glass which are both in contact with this spacer.
- This spacer also forms a flange according to watchmaking terminology, that is to say that it extends on the interior side between the dial and the glass, without necessarily resting on the dial and therefore without necessarily being in contact with the dial but covering the edge of the dial and defining the interior surface that visually delimits the space for the analog display.
- the flange also defines the radial surface forming an axial stop and a support for the edge of the watch glass, as is the case in the embodiments described.
- the seal and the intermediate part are configured so that, in an axial plane parallel to the main axis 10, an oblique geometric line 54 passing through the middle 56 of the active zone 32 of the solar cell 30 and the junction point between the radial surface 42 of the intermediate part and the axial surface 44 of the seal 18 forms an angle a whose value is between 35° and 70°.
- the value of said angle ⁇ is between 40° and 65°.
- FIG. 6 shows an alternative embodiment.
- the 2A watch of this variant differs from the variant shown on Figure 4 by the fact that the intermediate part 20A of the part 16A, more particularly its interior part 48A, comprises a semi-transparent film 60 defining the interior surface 52A of the intermediate part which is visible through the glass 14.
- This semi-transparent film partially lets the incident light pass from the space 62, reserved for the analog display, while masking the solar cell 30 for a user looking, under normal light conditions, at the interior surface 52A through the glass 14.
- This variant is particularly advantageous for classic watches having a case formed of a metallic material.
- the semi-transparent film can in another variant have an appearance other than metallic, in particular an appearance similar to a ceramic or, more generally, any opaque appearance.
- the intermediate part 20A has on its lower surface 66 a reflective lower layer, in particular a reflective metal film 64 which is deposited on the lower surface.
- This reflective layer or this reflective film reflects upwards the useful light which arrives on it, so as to return at least partly this incident light towards the solar cell 30.
- this layer or this film can either generate a classical reflection, or generate a diffraction in reflection which concentrates the reflection in an oblique direction oriented towards the solar cell 30.
- the internal surface of the reflective layer or of the reflective film or the lower surface 66 can present a structuring which mainly generates an oblique reflection for an incident light ray in the vertical/axial direction, so as to favor an oblique reflection in the direction of the solar cell.
- the intermediate part has a lower surface which is covered by a reflective layer, this intermediate part forming a transparent or translucent medium between at least the lower geometric surface or the lower surface (following variants) of the seal and the reflective layer.
- FIG. 7 shows in section a first variant of a second embodiment of a 2B watch according to the invention, this first variant having several differences relative to the described variants of the first embodiment. Not all references already described will be described again.
- This second embodiment differs from the first embodiment mainly in that the seal 18B and the intermediate part 20B form two separate parts. In the first variant, these two distinct parts are separated by an air gap 72 forming a transparent intermediate medium between the seal and the intermediate part.
- This first variant is distinguished from the previous embodiment variants by the fact that the solar cell 30 is not arranged in an internal circular recess of the box 4, as in the variants of the first embodiment shown in the figures, but against the internal vertical wall 24B of the box 4B which defines a cylindrical surface extending from the top of the seal 18B, against which the latter presses by its rear surface, to the bottom of the solar cell 30 (similar to that shown in Figure 3 ).
- the solar cell which has a small thickness, is located in the vertical extension of the rear zone of the seal.
- the seal 18B is made of a transparent or translucent material, that is to say it forms a transparent or translucent medium.
- the intermediate part 20B of the watch 2B is formed by a transparent material and by a translucent diffuser 70 defining the interior surface 52B of the intermediate part visible through the glass 14. More particularly, the exterior part of the intermediate part is made up of a transparent material and the interior part 48B of this intermediate part comprises an internal part, integral with the exterior part and made up of the same transparent material, and the translucent diffuser 70 which forms an interior ring blurring everything that is behind it, notably the solar cell 30. In particular, the diffuser 70 blurs the contours and reliefs of the objects located behind it for a user who looks at the interior surface 52B through the glass 14.
- the diffuser can have a certain coloring chosen by the designer of the watch. This diffuser can generate diffusion with a selected angular opening (relative to the direction orthogonal to the interior surface 52B) for the visible and/or infrared light incident from the space 62, so as to promote propagation of the visible and/or light. or infrared in the intermediate part 20B towards the solar cell 30.
- the first variant of the second embodiment does not have a lower reflective film arranged under the intermediate part, but the dial 12 advantageously has a reflective surface which is possibly also diffusing.
- the intermediate part can also include a translucent diffuser 70 described above.
- the seal is integral with the outer part and the inner part, similar to that mentioned above, of the intermediate part and forms with these outer and inner parts a single part consisting of the same transparent material.
- the seal is made of material with only the exterior part of the intermediate part and forms with this external part a single part made of the same transparent material.
- the interior part of the intermediate part is in the latter case formed entirely or in part by a translucent material arranged so as to diffuse the visible and/or infrared light coming from the space 62 provided for the analog display.
- the seal is made of material with at least one exterior part of the intermediate part and forms with this at least one exterior part a single part made of the same transparent material.
- FIG 8 shows in section a 2C watch according to a second variant of the second embodiment.
- the seal 18C and the intermediate part 20C form two distinct parts which are assembled by a layer of glue 76 forming a transparent or translucent intermediate medium between the seal and the intermediate part.
- the solar cell 30C is arranged, as in the variants described in the first embodiment, in a recess/housing 28C of the box 4C.
- the intermediate part 20C has a lower part which rests on the edge of the movement 6, or alternatively on a casing circle of this movement or on a part of the case presenting a horizontal surface on which also rests at least the edge of the dial 12 (as in Figures 1-6 ).
- the intermediate part 20C comprises a translucent diffuser 70 defining its interior surface 52B.
- the seal 18C is transparent or translucent, just like the glue layer 76.
- the intermediate part 20C is formed of a transparent material. This second variant still has a specificity in that the 30C solar cell extends partly below of the lower level of the dial 12.
- the movement 6 has a frustoconical peripheral surface 78 which frees a lateral space to allow the propagation of light below the lower level of the dial, which makes it possible to further increase the height of the solar cell and to increase the quantity of light incident behind the intermediate part which is captured by the solar cell. We thus also capture light emerging from the lower surface of the intermediate part.
- the frustoconical surface 78 is a metallic surface which reflects light.
- the glass 14C is a flat glass, unlike the curved glass 14 of the embodiments described previously.
- the intermediate part 20D comprises an inner ring 80 partially forming the inner part of the intermediate part.
- the inner ring 80 forms an opaque medium. It is preferably formed by a metal and thus has an interior surface 52D which is metallic and also an exterior surface 82 which is metallic and which entirely reflects the light which propagates in the region of the intermediate part located outside this inner ring, which is preferably transparent.
- the seal 18D is separate from the intermediate part, but its lower surface 50D is in contact with the upper surface of the intermediate part. More precisely, the outer part of the intermediate part 20D and the seal 18B are contiguous.
- the intermediate part 20D is supported via its lower surface 86 on a caging circle 7 provided for the movement 6 in the box 4D.
- the intermediate part has a frustoconical surface 84.
- the surfaces 84 and 86 are covered by a metal film so as to reflect the incident light from the part intermediate 20D and thus increase the quantity of light which finally arrives on the active zone 32D of the solar cell 30D.
- the seal 18B and the transparent part of the intermediate part 20D are made from one material and form a single part made of the same transparent material.
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- Power Engineering (AREA)
- Electric Clocks (AREA)
Abstract
La montre comprend un joint d'étanchéité (18) agencé à la périphérie du verre (14), une partie intermédiaire (20) entourant latéralement l'affichage analogique et définissant une surface radiale formant une butée axiale pour le verre, une cellule solaire (30) s'étendant au moins en majeure partie entre le niveau inférieur du cadran et le verre et étant agencée derrière la partie intermédiaire, laquelle est formée au moins partiellement par un matériau transparent ou translucide et configurée pour permettre à de la lumière incidente de se propager dans cette partie intermédiaire et d'atteindre ensuite la cellule solaire. Le joint d'étanchéité est également formé au moins en majeure partie par un matériau transparent ou translucide et il forme avec la partie intermédiaire axialement un milieu continu. Dans des variantes, le joint d'étanchéité est agencé axialement de manière contiguë à la partie intermédiaire ou il est séparé axialement de cette partie intermédiaire par un milieu intermédiaire transparent ou translucide.The watch comprises a seal (18) arranged at the periphery of the glass (14), an intermediate part (20) laterally surrounding the analog display and defining a radial surface forming an axial stop for the glass, a solar cell ( 30) extending at least mainly between the lower level of the dial and the glass and being arranged behind the intermediate part, which is formed at least partially by a transparent or translucent material and configured to allow incident light to shine propagate in this intermediate part and then reach the solar cell. The seal is also formed at least mainly by a transparent or translucent material and it forms with the intermediate part axially a continuous medium. In variants, the seal is arranged axially contiguous to the intermediate part or it is separated axially from this intermediate part by a transparent or translucent intermediate medium.
Description
L'invention concerne le domaine des montres munies d'au moins une cellule solaire. Plus particulièrement, l'invention concerne une montre ayant comme source d'alimentation électrique une cellule solaire agencée au moins en majeure partie entre le mouvement incorporé dans une boîte et le verre de cette boîte recouvrant un affichage analogique de l'heure et derrière une partie annulaire, notamment une entretoise ou un rehaut, entourant latéralement l'affichage analogique, cette partie annulaire étant au moins en partie transparente ou translucide et agencée de manière à permettre à de la lumière traversant le verre d'atteindre la cellule solaire.The invention relates to the field of watches equipped with at least one solar cell. More particularly, the invention relates to a watch having as an electrical power source a solar cell arranged at least mainly between the movement incorporated in a box and the glass of this box covering an analog time display and behind a part annular, in particular a spacer or a flange, laterally surrounding the analog display, this annular part being at least partly transparent or translucent and arranged so as to allow light passing through the glass to reach the solar cell.
Les documents
Les réalisations décrites précédemment permettent de récolter, pour la cellule solaire, seulement la lumière qui se trouve dans l'espace de l'affichage analogique entre le verre et le cadran et qui traverse radialement la partie intermédiaire située entre la partie annulaire en saillie de la boîte, formant le support du verre, et le cadran. La quantité d'énergie lumineuse pouvant être captée par la cellule solaire est donc limitée, surtout si le cadran est peu réfléchissant. Ensuite, le caractère transparent ou translucide de la partie intermédiaire dans ces réalisations peut poser un problème esthétique pour des montres classiques qui comprennent généralement un rehaut, situé entre le cadran et le verre, ayant un aspect opaque et en particulier un reflet métallique.The achievements described above make it possible to collect, for the solar cell, only the light which is in the space of the analog display between the glass and the dial and which passes radially through the intermediate part located between the protruding annular part of the box, forming the glass support, and the dial. The quantity of light energy that can be captured by the solar cell is therefore limited, especially if the dial is not very reflective. Then, the transparent or translucent nature of the intermediate part in these embodiments can pose an aesthetic problem for classic watches which generally include a flange, located between the dial and the glass, having an opaque appearance and in particular a metallic reflection.
La présente invention a pour objectif d'augmenter la quantité de lumière pouvant être reçue par la cellule solaire dans une montre ayant une cellule solaire agencée en majeure partie derrière une partie intermédiaire en matériau transparent ou translucide et entourant l'affichage analogique ou, alternativement, de permettre la réalisation d'une montre ayant une cellule solaire agencée radialement derrière une telle partie intermédiaire en conservant un aspect opaque, notamment métallique, pour un observateur regardant la surface intérieure de cette partie intermédiaire au travers du verre de montre, tout en assurant que la cellule solaire reçoive suffisamment de lumière pour lui permettre d'alimenter tout ou partie du mouvement incorporé dans la montre. Le deuxième objectif est relatif à l'aspect esthétique d'une montre ayant une cellule solaire agencée derrière une partie intermédiaire délimitant latéralement l'espace de l'affichage analogique, en particulier une montre dont la boîte est prévue en métal ou en céramique.The present invention aims to increase the quantity of light that can be received by the solar cell in a watch having a solar cell arranged mainly behind an intermediate part made of transparent or translucent material and surrounding the analog display or, alternatively, to allow the production of a watch having a solar cell arranged radially behind such an intermediate part while maintaining an opaque appearance, in particular metallic, for an observer looking at the interior surface of this intermediate part through the watch glass, while ensuring that the solar cell receives enough light to enable it to power all or part of the movement incorporated in the watch. The second objective relates to the aesthetic aspect of a watch having a solar cell arranged behind an intermediate part laterally delimiting the space of the analog display, in particular a watch whose case is made of metal or ceramic.
A cet effet, l'invention concerne une montre comprenant une boîte, un mouvement muni d'un affichage analogique et définissant un axe principal de la boîte qui est orthogonal au plan général de cette boîte, un verre situé au-dessus de l'affichage analogique, un joint d'étanchéité agencé à la périphérie du verre entre une surface latérale de ce verre et une paroi axiale de la boîte, une partie intermédiaire entourant latéralement l'affichage analogique, une cellule solaire (étant entendu sa zone active captant de la lumière visible et/ou infrarouge) s'étendant au moins en majeure partie entre le mouvement et le verre et étant agencée derrière la partie intermédiaire relativement à l'affichage analogique. La partie intermédiaire est formée au moins partiellement par un matériau transparent ou translucide et est configurée de manière à permettre à de la lumière visible et/ou infrarouge traversant le verre depuis l'extérieur de la montre de se propager dans ledit matériau transparent ou translucide et ensuite d'atteindre la cellule solaire. Cette cellule solaire est agencée dans une région située radialement au-delà du pourtour du verre. Ensuite, la partie intermédiaire définit une surface radiale formant une butée axiale pour une zone périphérique du verre longeant intérieurement son pourtour. Le joint d'étanchéité est également formé au moins en majeure partie par un matériau transparent ou translucide qui définit au moins en majeure partie une surface axiale contre laquelle presse la surface latérale du verre. De plus, le joint d'étanchéité forme avec la partie extérieure de la partie intermédiaire un milieu continu ou est agencé axialement de manière contiguë à cette partie extérieure ou est séparé axialement de cette partie extérieure au moins en majeure partie par un milieu intermédiaire transparent ou translucide, le joint d'étanchéité étant configuré de manière à permettre à de la lumière visible et/ou infrarouge incidente sur sa surface axiale ou sur sa surface supérieure de se propager dans le matériau transparent ou translucide qui le forme jusqu'à une surface géométrique inférieure ou surface inférieure délimitant inférieurement le joint d'étanchéité. La partie extérieure de la partie intermédiaire est agencée de manière à pouvoir substantiellement collecter la lumière visible et/ou infrarouge traversant la surface géométrique inférieure ou surface inférieure du joint d'étanchéité et à permettre à cette lumière visible et/ou infrarouge collectée de se propager dans le matériau transparent ou translucide de la partie intermédiaire et d'atteindre ensuite au moins en partie la cellule solaire.For this purpose, the invention relates to a watch comprising a case, a movement provided with an analog display and defining a main axis of the case which is orthogonal to the general plane of this case, a glass located above the display analog, a seal arranged at the periphery of the glass between a lateral surface of this glass and an axial wall of the box, an intermediate part laterally surrounding the analog display, a solar cell (understanding its active zone capturing the visible and/or infrared light) extending at least mainly between the movement and the glass and being arranged behind the intermediate part relative to the analog display. The intermediate part is formed at least partially by a transparent or translucent material and is configured so as to allow visible and/or infrared light passing through the glass from outside the watch to propagate in said transparent or translucent material and then reach the solar cell. This solar cell is arranged in a region located radially beyond the periphery of the glass. Then, the intermediate part defines a radial surface forming an axial stop for a peripheral zone of the glass internally running along its periphery. The seal is also formed at least mainly by a transparent or translucent material which defines at least mainly an axial surface against which the lateral surface of the glass presses. In addition, the seal forms with the outer part of the intermediate part a continuous medium or is arranged axially contiguous to this outer part or is separated axially from this outer part at least for the most part by a transparent intermediate medium or translucent, the seal being configured so as to allow visible and/or infrared light incident on its axial surface or on its upper surface to propagate in the transparent or translucent material which forms it to a surface lower geometric or lower surface delimiting the seal below. The outer part of the intermediate part is arranged so as to be able to substantially collect visible and/or infrared light passing through the lower geometric surface or lower surface of the seal and to allow this collected visible and/or infrared light to propagate in the transparent or translucent material of the intermediate part and then reaching at least partly the solar cell.
Dans un mode de réalisation avantageux, le joint d'étanchéité est venu de matière avec au moins une partie extérieure de la partie intermédiaire et il forme avec cette au moins une partie extérieure une seule partie constituée d'un même matériau transparent ou translucide. Dans une variante avantageuse, le joint d'étanchéité est venu de matière avec la partie intermédiaire et forme avec cette partie intermédiaire une seule pièce constituée d'un même matériau transparent ou translucide.In an advantageous embodiment, the seal is made of material with at least one exterior part of the intermediate part and it forms with this at least one exterior part a single part consisting of the same transparent or translucent material. In an advantageous variant, the seal is made integrally with the intermediate part and forms with this intermediate part a single piece made of the same transparent or translucent material.
Dans une première variante particulière, la partie intermédiaire comprend une partie intérieure délimitant un espace pour l'affichage analogique, cette partie intérieure comprenant un diffuseur translucide définissant la surface intérieure de la partie intermédiaire visible au travers du verre. De préférence, au moins une partie extérieure de la partie intermédiaire est constituée d'un matériau transparent.In a first particular variant, the intermediate part comprises an interior part delimiting a space for the analog display, this interior part comprising a translucent diffuser defining the interior surface of the intermediate part visible through the glass. Preferably, at least one exterior part of the intermediate part is made of a transparent material.
Dans une deuxième variante particulière, la partie intermédiaire comprend une partie intérieure délimitant un espace pour l'affichage analogique, cette partie intérieure comprenant un film semi-transparent définissant la surface intérieure de la partie intermédiaire visible au travers du verre, ce film semi-transparent étant agencé de manière à laisser partiellement passer la lumière incidente depuis l'espace réservé à l'affichage analogique tout en masquant la cellule solaire pour un utilisateur regardant, sous des conditions lumineuses normales, ladite surface intérieure au travers du verre. De préférence, le film semi-transparent est agencé de manière à présenter un aspect métallique du côté dudit espace pour l'utilisateur regardant la surface intérieure de la partie intermédiaire au travers du verre.In a second particular variant, the intermediate part comprises an interior part delimiting a space for the analog display, this interior part comprising a semi-transparent film defining the interior surface of the intermediate part visible through the glass, this semi-transparent film being arranged so as to partially allow incident light to pass from the space reserved for the analog display while masking the solar cell for a user viewing, under normal light conditions, said interior surface through the glass. Preferably, the semi-transparent film is arranged so as to present a metallic appearance on the side of said space for the user looking at the interior surface of the intermediate part through the glass.
Dans une variante principale, la surface radiale de la partie intermédiaire est au moins en majeure partie définie par le matériau transparent ou translucide formant cette partie intermédiaire, laquelle est agencée de manière à permettre que la lumière visible et/ou infrarouge traversant la surface radiale peut se propager dans le matériau transparent ou translucide formant la partie intermédiaire et atteindre ensuite au moins en partie la cellule solaire.In a main variant, the radial surface of the intermediate part is at least mainly defined by the transparent or translucent material forming this intermediate part, which is arranged in such a way as to allow visible and/or infrared light passing through the radial surface to propagate in the transparent or translucent material forming the intermediate part and then reach at least partly the solar cell.
Dans une variante avantageuse, la partie intermédiaire présente une surface inférieure qui est recouverte par une couche réfléchissante, cette partie intermédiaire formant un milieu transparent ou translucide entre au moins la surface géométrique inférieure ou surface inférieure du joint d'étanchéité et la couche réfléchissante.In an advantageous variant, the intermediate part has a lower surface which is covered by a reflective layer, this intermediate part forming a transparent or translucent medium between at least the lower geometric surface or lower surface of the seal and the reflective layer.
L'invention sera décrite ci-après de manière plus détaillée à l'aide des dessins annexés, donnés à titre d'exemples nullement limitatifs, dans lesquels :
- la
Figure 1 est une coupe axiale d'une montre selon un premier mode de réalisation de l'invention ; - la
Figure 2 est un agrandissement partiel de laFigure 1 ; - la
Figure 3 est une vue en perspective d'une cellule solaire qui est incorporée dans la boîte de la montre de laFigure 1 ; - la
Figure 4 est une autre coupe axiale, selon une autre direction radiale, de la montre de laFigure 1 ; - la
Figure 5 est une vue semblable à celle de laFigure 4 avec en plus des traits de construction définissant la configuration d'une pièce en matériau translucide formant un rehaut entre le cadran et le verre et conjointement un joint d'étanchéité entre ce verre et une paroi verticale supérieure de la boîte ;
- la
Figure 6 est une coupe, selon un même plan de coupe que celui de laFigure 4 , d'une variante de réalisation ; - la
Figure 7 est une coupe, selon un même plan de coupe que celui de laFigure 4 , d'une première variante d'un deuxième mode de réalisation d'une montre selon l'invention ; - la
Figure 8 est une coupe, selon un même plan de coupe que celui de laFigure 4 , d'une deuxième variante du deuxième mode de réalisation d'une montre selon l'invention ; - la
Figure 9 est une coupe, selon un même plan de coupe que celui de laFigure 4 , d'un troisième mode de réalisation d'une montre selon l'invention.
- there
Figure 1 is an axial section of a watch according to a first embodiment of the invention; - there
Figure 2 is a partial enlargement of theFigure 1 ; - there
Figure 3 is a perspective view of a solar cell that is incorporated into the watch case of theFigure 1 ; - there
Figure 4 is another axial section, in another radial direction, of the watch of theFigure 1 ; - there
Figure 5 is a view similar to that of theFigure 4 with in addition construction features defining the configuration of a piece of translucent material forming a highlight between the dial and the glass and jointly a seal between this glass and an upper vertical wall of the box;
- there
Figure 6 is a section, according to the same cutting plane as that of theFigure 4 , of an alternative embodiment; - there
Figure 7 is a section, according to the same cutting plane as that of theFigure 4 , a first variant of a second embodiment of a watch according to the invention; - there
Figure 8 is a section, according to the same cutting plane as that of theFigure 4 , a second variant of the second embodiment of a watch according to the invention; - there
Figure 9 is a section, according to the same cutting plane as that of theFigure 4 , of a third embodiment of a watch according to the invention.
En référence aux figures on décrira ci-après divers modes de réalisation et variantes d'une montre selon l'invention.With reference to the figures, various embodiments and variants of a watch according to the invention will be described below.
Un premier mode de réalisation est représenté aux
La montre 2 comprend une boîte 4, un mouvement 6 muni d'un affichage analogique 8 et définissant un axe principal 10 de la boîte, orthogonal au plan général de cette boîte qui est parallèle au cadran 12, un verre 14 situé au-dessus de l'affichage analogique 8, une pièce 16 formant dans sa partie supérieure un joint d'étanchéité 18 agencé à la périphérie du verre entre une surface latérale 22 de ce verre et une paroi verticale supérieure 24 de la boîte. La pièce 16 forme également une partie intermédiaire 20 entourant latéralement l'affichage analogique et située entre le verre et le cadran. La montre 2 comprend aussi une cellule solaire 30 s'étendant entre le mouvement 6 et le verre 14 et étant agencée derrière la partie intermédiaire 20 relativement à l'affichage analogique 8. La cellule solaire 30 comprend une zone active 32 et une zone de connexion 33 agencée en dessous de la zone active, cette zone de connexion comprenant une piste annulaire 31 située du côté intérieur et formant une première électrode de la cellule solaire. La deuxième électrode est formée par un substrat métallique très mince situé du côté extérieur de la cellule solaire, derrière une couche photosensible en silicium déposée sur ce substrat métallique. Par définition dans la présente description, la zone active de la cellule solaire est constituée par sa partie supérieure qui s'étend depuis la piste annulaire 31, la ligne de séparation entre la zone active et la zone de connexion étant définie par le bord supérieur de la piste annulaire. La cellule solaire 30 est agencée dans une région située radialement au-delà du pourtour du verre 14, défini par la surface latérale 22, dans un évidement 28 formant un logement circulaire, peu profond, dans la boite 4 pour cette cellule solaire 30, laquelle est ainsi située légèrement en retrait de la surface verticale supérieure 24 de la boîte. A la
La partie intermédiaire 20 est formée par un matériau translucide et est configurée de manière à permettre à de la lumière visible et/ou infrarouge traversant le verre 14 depuis l'extérieur de la montre de se propager dans le matériau translucide et ensuite d'atteindre la cellule solaire 30. La partie intermédiaire 20 définit une surface radiale 42 formant une butée axiale pour une zone périphérique 15 du verre longeant intérieurement son pourtour. On définit pour la partie intermédiaire une partie extérieure 46, dans le prolongement vertical du joint d'étanchéité, et une partie intérieure 48 (séparée à la
Le joint d'étanchéité 18 est également formé par un matériau translucide qui définit une surface axiale 44 contre laquelle presse la surface latérale 22 du verre. Le joint d'étanchéité forme ici un milieu translucide continu avec la partie extérieure 46 de la partie intermédiaire 20 et est configuré de manière à permettre à de la lumière visible et/ou infrarouge incidente sur sa surface axiale 44 et/ou sur sa surface supérieure 45 de se propager dans le matériau translucide qui le forme jusqu'à une surface géométrique inférieure 50 délimitant inférieurement le joint d'étanchéité. La partie intermédiaire, en particulier la partie extérieure 46 de celle-ci, est agencée de manière à pouvoir substantiellement collecter la lumière visible et/ou infrarouge traversant la surface géométrique inférieure 50 du joint d'étanchéité et à permettre à cette lumière visible et/ou infrarouge collectée de se propager dans le matériau translucide de la partie intermédiaire, en particulier de la partie extérieure de celle-ci, et d'atteindre ensuite au moins en partie la cellule solaire 30. Dans ce premier mode de réalisation avantageux, le joint d'étanchéité 18 est venu de matière avec la partie intermédiaire 20 et forme avec cette partie intermédiaire une seule pièce 16 qui est constituée d'un même matériau translucide.The
Il résulte de la présente invention que l'agencement de la pièce translucide 16 permet à de la lumière visible et/ou infrarouge incidente sur la surface axiale intérieure 44 et sur la surface supérieure 45 du joint d'étanchéité 18, formé par cette pièce 16, de se propager dans le matériau translucide qui le forme et ensuite dans la partie intermédiaire 20, en particulier dans sa partie extérieure 46, jusqu'à la cellule solaire 30, laquelle est configurée et agencée dans la boîte 4 de manière à pouvoir capter cette lumière visible et/ou infrarouge, notamment celle correspondant au maximum du spectre de lumière capté efficacement par la cellule solaire. Ainsi, non seulement de la lumière ayant pénétré au travers du verre dans l'espace intérieur 62 prévu pour l'affichage analogique peut parvenir à la cellule solaire via la surface intérieure 52 de la partie intermédiaire, comme dans l'art antérieur, mais également de la lumière incidente sur le joint d'étanchéité 18, à savoir sur sa surface supérieure 45 et sur sa surface axiale / verticale intérieure 44. Ainsi, la quantité de lumière pouvant être captée par la cellule solaire est augmentée.It results from the present invention that the arrangement of the
Dans une variante particulière permettant d'augmenter encore la quantité de lumière captée par la cellule solaire 30, la pièce 16 est constituée d'un matériau transparent, c'est-à-dire formant un milieu transparent pour au moins une partie utile du spectre lumineux de la lumière visible et/ou infrarouge. Dans des variantes ou autres modes de réalisation, dont certains sont présentés par la suite, la surface intérieure de la partie intermédiaire est rendue opaque, semi-transparente ou translucide pour un observateur qui regarde cette surface intérieure au travers du verre, de manière à donner un aspect plus classique à la montre.In a particular variant making it possible to further increase the quantity of light captured by the
Selon une variante préférée, la surface radiale 42 de la partie intermédiaire 20 est au moins en majeure partie définie par le matériau translucide formant cette partie intermédiaire, plus particulièrement sa partie intérieure, ou, dans la variante particulière susmentionnée, par le matériau transparent formant la partie intermédiaire, plus particulièrement sa partie intérieure. Ceci permet d'augmenter la quantité de lumière incidente sur la face supérieure de la montre qui peut parvenir à la cellule solaire 30. Dans la variante préférée décrite ici, la surface radiale 42 de la partie intermédiaire 20, formant une butée axiale pour le verre qui repose généralement sur cette surface radiale, est entièrement définie par le matériau translucide formant la partie intermédiaire 20, plus particulièrement sa partie intérieure 48. On notera que, dans d'autres variantes ou d'autres modes de réalisation en partie décrits par la suite, la surface radiale 42 est quasi entièrement ou en majeure partie définie par le matériau translucide ou transparent formant la partie intermédiaire, seul un film ou une partie annulaire interne, définissant une zone intérieure de la surface radiale, n'étant pas translucide ou transparent. De manière générale, la surface radiale de la partie intermédiaire est donc au moins en majeure partie définie par le matériau transparent ou translucide formant cette partie intermédiaire, laquelle est agencée de manière à permettre que la lumière visible et/ou infrarouge traversant la surface radiale peut se propager dans le matériau transparent ou translucide formant la partie intermédiaire et atteindre ensuite au moins en partie la cellule solaire.According to a preferred variant, the
Dans le premier mode de réalisation, la partie intermédiaire 20 forme une entretoise entre le verre 14 et le cadran 12, c'est-à-dire qu'elle définit, éventuellement avec une couche ou feuille réfléchissante inférieure additionnelle le cas échéant, l'écartement entre le cadran et le verre qui sont tous deux en contact avec cette entretoise. Cette entretoise forme aussi un rehaut selon la terminologie horlogère, c'est-à-dire qu'il s'étend du côté intérieur entre le cadran et le verre, sans nécessairement prendre appui sur le cadran et donc sans nécessairement être en contact avec le cadran mais en recouvrant le bord du cadran et en définissant la surface intérieure qui délimite visuellement l'espace pour l'affichage analogique. En général, le rehaut définit aussi la surface radiale formant une butée axiale et un appui pour le bord du verre de montre, comme c'est le cas dans les modes de réalisation décrits.In the first embodiment, the
Comme indiqué à la
La
Selon une autre variante avantageuse, également montrée à la
La
Le joint d'étanchéité 18B est constitué d'un matériau transparent ou translucide, c'est-à-dire qu'il forme un milieu transparent ou translucide. La partie intermédiaire 20B de la montre 2B est formée par un matériau transparent et par un diffuseur translucide 70 définissant la surface intérieure 52B de la partie intermédiaire visible au travers du verre 14. Plus particulièrement, la partie extérieure de la partie intermédiaire est constituée d'un matériau transparent et la partie intérieure 48B de cette partie intermédiaire comprend une partie interne, venue de matière avec la partie extérieure et constituée du même matériau transparent, et le diffuseur translucide 70 qui forme un anneau intérieur floutant tout ce qui se trouve derrière lui, notamment la cellule solaire 30. En particulier, le diffuseur 70 rend flou les contours et reliefs des objets situés derrière lui pour un utilisateur qui regarde la surface intérieure 52B au travers du verre 14. Le diffuseur peut avoir une certaine coloration choisie par le concepteur de la montre. Ce diffuseur peut engendrer une diffusion avec une ouverture angulaire sélectionnée (relativement à la direction orthogonale à la surface intérieure 52B) pour la lumière visible et/ou infrarouge incidente depuis l'espace 62, de sorte à favoriser une propagation de la lumière visible et/ou infrarouge dans la partie intermédiaire 20B en direction de la cellule solaire 30. On remarquera que la première variante du deuxième mode de réalisation n'a pas de film inférieur réfléchissant agencé sous la partie intermédiaire, mais le cadran 12 présente avantageusement une surface réfléchissante qui est éventuellement aussi diffusante.The
On notera que dans une variante non représentée du premier mode de réalisation, la partie intermédiaire peut également comprendre un diffuseur translucide 70 décrit ci-avant. Dans une telle variante du premier mode de réalisation, le joint d'étanchéité est venu de matière avec la partie extérieure et la partie interne, semblable à celle susmentionnée, de la partie intermédiaire et forme avec ces parties extérieure et interne une seule partie constituée d'un même matériau transparent. Dans une variante particulière, le joint d'étanchéité est venu de matière avec seulement la partie extérieure de la partie intermédiaire et forme avec cette partie extérieure une seule partie constituée d'un même matériau transparent. La partie intérieure de la partie intermédiaire est dans ce dernier cas formé entièrement ou en partie par un matériau translucide agencé de manière à diffuser la lumière visible et/ou infrarouge provenant de l'espace 62 prévu pour l'affichage analogique. Ainsi, de manière générale, le joint d'étanchéité est venu de matière avec au moins une partie extérieure de la partie intermédiaire et forme avec cette au moins une partie extérieure une seule partie constituée d'un même matériau transparent.Note that in a variant not shown of the first embodiment, the intermediate part can also include a
La
A la
Dans une variante avantageuse, le joint d'étanchéité 18B et la partie transparente de la partie intermédiaire 20D sont venus de matière et forme une seule partie constituée d'un même matériau transparent.In an advantageous variant, the
Claims (11)
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EP22169468.0A EP4266133A1 (en) | 2022-04-22 | 2022-04-22 | Watch comprising a solar cell |
US18/165,671 US20230341820A1 (en) | 2022-04-22 | 2023-02-07 | Watch comprising a solar cell |
CN202310235939.5A CN116931414A (en) | 2022-04-22 | 2023-03-13 | Watch comprising a solar cell |
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EP22169468.0A EP4266133A1 (en) | 2022-04-22 | 2022-04-22 | Watch comprising a solar cell |
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EP3093717A1 (en) | 2014-06-24 | 2016-11-16 | Citizen Holdings Co., Ltd. | Electronic timepiece with solar cell |
JP6474326B2 (en) | 2015-06-22 | 2019-02-27 | シチズン時計株式会社 | Electronic clock with solar battery |
-
2022
- 2022-04-22 EP EP22169468.0A patent/EP4266133A1/en active Pending
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2023
- 2023-02-07 US US18/165,671 patent/US20230341820A1/en active Pending
- 2023-03-13 CN CN202310235939.5A patent/CN116931414A/en active Pending
Patent Citations (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS60146887U (en) * | 1984-03-13 | 1985-09-30 | セイコーエプソン株式会社 | solar battery clock |
JP2003121567A (en) * | 2001-10-17 | 2003-04-23 | Citizen Watch Co Ltd | Electronic timepiece with solar cell |
EP1574919A1 (en) * | 2002-12-16 | 2005-09-14 | Citizen Watch Co. Ltd. | Electronic timepiece with solar cell |
EP1586963A1 (en) * | 2003-01-23 | 2005-10-19 | Citizen Watch Co. Ltd. | Electronic timepiece with solar cell |
JP2005114650A (en) * | 2003-10-10 | 2005-04-28 | Citizen Watch Co Ltd | Timepiece with solar cell |
JP2006184059A (en) * | 2004-12-27 | 2006-07-13 | Citizen Watch Co Ltd | Timepiece having solar cell |
JP2010210295A (en) * | 2009-03-09 | 2010-09-24 | Citizen Holdings Co Ltd | Electronic wristwatch with solar cell |
EP3093717A1 (en) | 2014-06-24 | 2016-11-16 | Citizen Holdings Co., Ltd. | Electronic timepiece with solar cell |
JP6474326B2 (en) | 2015-06-22 | 2019-02-27 | シチズン時計株式会社 | Electronic clock with solar battery |
Also Published As
Publication number | Publication date |
---|---|
US20230341820A1 (en) | 2023-10-26 |
CN116931414A (en) | 2023-10-24 |
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