A watch dial comprising autonomous lighting device

Abstract

One aspect of the utility model relates to a watch dial comprising an autonomous lighting device, the autonomous lighting device (3) comprises the following functional elements: at least one light emitting source (4), an autonomous power supply unit (21), and a control unit (7) used for managing the operation of the at least one light emitting source (4), the dial (2a, 2b) is formed by a plurality of assemblies (9a, 9b) through stacked layers (10, 11, 12, 13, 14), the plurality of layers (10, 11, 12, 13, 14) are connected together via stacked layers (10, 11, 12, 13, 14) and each comprise one or more functional elements of the autonomous lighting device (3).

Description

TECHNICAL FIELD

[0001] The present utility model relates to a dial of a watch with a completely autonomous lighting device. BACKGROUND

[0002] In the prior art, various types of lighting devices have been proposed for watches to enable reading the time in low light conditions. These devices are essentially based on the presence of phosphorescent materials on the dial of the watch. The use of such materials has achieved different degrees of success, although they all suffer from the well-known drawback of decreasing effectiveness over time. In addition, these materials usually require periodic recharging by exposure to light to maintain the level of phosphorescence emission.

[0003] In this context, it should be understood that it is necessary to find a solution that does not have the drawbacks of the prior art. SUMMARY

[0004] The object of the present utility model is to overcome these drawbacks by providing a watch whose dial lighting has a constant efficiency over time.

[0005] One aspect of the present utility model relates to a dial for a watch, the dial comprising an autonomous lighting device, said autonomous lighting device comprising the following functional elements:

[0006] - at least one light source,

[0007] - an autonomous power supply unit, and

[0008] - a control unit for managing the operation of said at least one light source,

[0009] The dial is formed by a plurality of stacked layers connected together and each comprising one or more functional elements of said autonomous lighting device.

[0010] Another aspect of the present utility model relates to:

[0011] - said assembly consists of a first layer forming the visible face of the dial, said first layer comprising at least one light source;

[0012] - said first layer is configured to be crossed in whole or in part by light radiation, in particular solar radiation;

[0013] - said first layer is completely or partially transparent or translucent;

[0014] - said assembly comprises a second layer comprising a photovoltaic module constituting said autonomous power supply unit;

[0015] - said second layer comprises a substrate on which said photovoltaic module is printed;

[0016] - said photovoltaic module is disposed on an active area of said second layer, said area being configured to receive light rays from the first layer of said assembly;

[0017] - said assembly comprises a third layer comprising an electrical energy accumulator constituting said autonomous electrical power supply unit;

[0018] - said third layer comprises a substrate on which said electrical energy accumulator is printed;

[0019] - said assembly comprises a fourth layer forming a hidden face of said dial, said hidden face comprising said control unit;

[0020] - said assembly comprises a third layer comprising a hidden face of said dial, said hidden face comprising said control unit and an electrical energy accumulator constituting said autonomous electrical power supply unit;

[0021] - said first layer is rigid with respect to the other layers comprised in said assembly, said other layers being flexible.

[0022] The present utility model relates to a watch comprising such a dial.

[0023] Advantageously, said watch comprises a mechanical or mechatronic or electronic watch movement. BRIEF DESCRIPTION OF DRAWINGS

[0024] The objects, advantages and features of the watch according to the present utility model will be more apparent from the following description based on at least one non-limiting embodiment illustrated in the attached drawings, wherein:

[0025] - Figure 1 shows a perspective view of a watch comprising a dial provided with an autonomous lighting device, according to one embodiment of the present utility model;

[0026] - Figure 2 shows an exploded view of a first variant of an assembly of four stacked layers forming said dial provided with an autonomous lighting device, each of said layers comprising one or more constituent elements of said lighting device, according to a first embodiment of the present utility model;

[0027] - Figure 3 shows a schematic view of this first variant of an assembly of layers forming a dial provided with an autonomous lighting device, according to the first embodiment of the present utility model;

[0028] - Figure 4 shows an exploded view of a second variant of an assembly of three stacked layers forming said dial provided with an autonomous lighting device, each of said layers comprising one or more constituent elements of said lighting device, according to a second embodiment of the present utility model;

[0029] - Figure 5 a schematic view showing this second variant of the assembly of layers forming a dial provided with an autonomous lighting device according to a second embodiment of the application. DETAILED DESCRIPTION

[0030] Figure 1 a schematic representation of table 1 comprising a watch case 19 provided with a central portion to which a bottom cover and a watch crystal 22 are fixed, a set of components forming a watch movement, and a dial 2a, 2b housed between the watch movement and the watch crystal 22.

[0031] In a manner known to those skilled in the art, the watch movement drives a hands assembly comprising a hour hand, a minute hand and possibly a second hand. To this end, the dial 2a, 2b comprises through holes receiving the axes of the hands. This dial 2a, 2b also comprises two faces 20a, 20b, among which:

[0032] - a face 20a visible from the outside of table 1, also called the “visible portion” or the “visible upper portion” of this dial 2a, 2b, and

[0033] - a face called hidden face 20b, arranged in the enclosure of the watch case 19 of table 1 opposite the watch movement, this face 20b also being called the “hidden portion” or the “hidden lower portion” of this dial 2a, 2b, 2b.

[0034] Such a visible face 20a comprises at least one graphical representation, such as:

[0035] - reference (or display) elements, such as for example numbers, indices, lines or dots, whether or not there are hands, which contribute to the display of the watch information / measurement or physical information / measurement measured by a sensor or the like included in the movement;

[0036] - inscriptions, patterns, texts, logos, etc.

[0037] Furthermore, it should be noted that, in the embodiment illustrated in Figures 1 to 5 , the dial 2a, 2b preferably has a circular shape. It should be understood that the application can also be implemented for dials 2a, 2b having other shapes, such as for example a triangular shape or a shape similar to a quadrilateral.

[0038] In the embodiments of the application, the watch movement is a mechanical movement. Alternatively, this movement can be an electronic movement or an electromechanical movement. In the following, when the movement is mechanical, they will be called mechanical watches and when they comprise respectively an electromechanical and an electronic movement, they will be called electromechanical and electronic watches.

[0039] with reference Figure 2 andFigure 4 Such dial 2a, 2b comprises an autonomous lighting device 3. This lighting device 3 has its own electric power supply, as will be seen later. Such lighting device 3 is considered autonomous, in particular with respect to the movement of watch 1, and in particular with respect to the energy source of this movement, for example when this source is an electric power supply, as in an electronic movement or an electromechanical movement. Under these conditions, it is understood that the energy used by this lighting device 3 does not compromise the autonomy of the movement.

[0040] In this context, the dial 2a, 2b can be removably mounted in the watch 1, regardless of the type of watch 1. The only condition to be met is that the dial 2a, 2b comprises this lighting device 3, thus independently of the movement of the watch 1.

[0041] This lighting device 3 comprised in this dial 2a, 2b comprises at least one light-emitting source 4, also called light source, an autonomous power supply unit 21 and a control unit 7.

[0042] In this context, the light-emitting source 4 can correspond to any electroluminescent element chosen from the following list, in a non-exhaustive and non-limiting manner, this list comprising:

[0043] - an electroluminescent capacitor, abbreviated LEC;

[0044] - a light-emitting diode of LED type, for "Light Emitting Diode", OLED type, for "Organic Light Emitting Diode", AMOLED type, for "Active Matrix Organic Light Emitting Diode" or QLED type, for "Quantum Light Emitting Diode";

[0045] - any electroluminescent material activated by a local electric field;

[0046] - any electroluminescent material activated by an electric current;

[0047] - any combination of these electroluminescent elements.

[0048] It should be noted that, in certain embodiments of the application, this light-emitting source 4 can be a light-emitting source 4 capable of forming an extended light-emitting source. This allows to give an extended light-emitting source a predetermined shape, not exhaustively listed or limited, a shape related to the graphical representation of a number, a letter, a logo or a text. It should also be noted that this light-emitting source 4 can produce light of any color and / or in any direction.

[0049] In this lighting device 3, the autonomous power supply unit 21 comprises an electric energy accumulator 6 and a photovoltaic module 5 comprising at least one photovoltaic cell, also called solar cell. This photovoltaic module 5 is via the Figure 3 and Figure 5Connecting elements labeled 17b and 18 are connected to the energy storage device 6. This photovoltaic module 5 may include one or more heterojunction or multijunction type basic cells connected in parallel or series. Each photovoltaic cell of this module 5 may be made in a manner known to those skilled in the art from copper, indium, gallium, and selenium, cadmium telluride, monocrystalline gallium arsenide, or monocrystalline or polycrystalline silicon or perovskite semiconductor materials. It should be noted that these examples are not limiting, and those skilled in the art will be able to find types of photovoltaic cells suitable for this invention.

[0050] In this lighting device 3, the control unit 7 (also referred to as a microcontroller) includes electronic circuitry 8, which includes hardware resources, particularly at least one processor cooperating with memory elements and address, data, and control buses. This control unit 7 includes algorithms in its memory elements for managing the illumination of the at least one light source 4. These algorithms are executed by the processor of this control unit 7, taking into account data from event sensors included in the lighting device 3, in order to manage the operation of the at least one light source 4.

[0051] It should be noted that such data can, for example, provide information related to events detected by these sensors that may contribute to the operation of the at least one light source 4. In a non-limiting and non-exhaustive manner, these events may include: detecting a specific light intensity level in the environment of Table 1, detecting a specific sound element or a specific sound level, detecting a specific visual object, detecting movement of a part of the user's body, including Table 1, on it, etc.

[0052] In this context, and specifically and in a non-limiting and non-exhaustive manner, the event sensors of this autonomous lighting device 3 include:

[0053] - A brightness sensor that allows the detection of ambient light levels;

[0054] - Motion sensors for a part of the user's body included in Table 1, such as gyroscopes and / or inertial sensors in the form of electronic components of the type of gyroscope and / or inertial electromechanical microsystem circuits;

[0055] - Microphone-type sound sensor, and / or

[0056] - Camera sensor type optical sensor.

[0057] Furthermore, when the lighting device 3 includes several light sources 4, the control unit 7 can manage / control their operation simultaneously and / or sequentially. Alternatively, this control unit 7 can manage / control each light source 4 individually. In this context, the management of the operation of each light source 4, in a non-limiting and non-exhaustive manner, may include the following operations: sequentially turning on or off, simultaneously turning on or off two or more light sources 4, causing one or more light sources 4 to flash, defining the flashing frequency of each light source 4, the flashing duration of each light source 4, the on or off duration of each light source 4, etc.

[0058] Such control unit 7 may also include in its memory elements algorithms for managing the energy storage device 6, particularly for managing the recharging of the energy storage device 6 by the photovoltaic module 5, and for managing the power consumption of the light source 4.

[0059] Therefore, as described above, the autonomous lighting device 3 is thus included in the dials 2a and 2b. In this configuration, the components of this lighting device 3 (i.e., the light source 4, the energy storage device 6, the photovoltaic module 5, and the control unit 7) are included in one or more layers 10, 11, 12, 13, and 14 forming the dials 2a and 2b.

[0060] refer to Figures 2 to 5 The dials 2a and 2b are formed from components 9a and 9b consisting of multiple material layers 10, 11, 12, 13, and 14 joined together. Within these components 9a and 9b, these layers 10, 11, 12, 13, and 14 are connected together by connecting elements such as adhesives, thus forming a single component 9a and 9b, and consequently, a one-piece dial 2a and 2b. These connecting elements can be clamps or screws. These layers 10, 11, 12, 13, and 14 are stacked within components 9a and 9b, meaning they are arranged vertically to each other in a defined order within the dials 2a and 2b.

[0061] Therefore, such one-piece dials 2a and 2b not only facilitate their integration into the case 19, but also have the advantage of being removably mounted in the case 19 of the watch 1.

[0062] exist Figure 3 In the first variant of component 9a shown in the figure, it consists of four consecutive layers 10, 11, 12, and 13:

[0063] - A first layer 10 forming / constructing the visible surface 20a of the dial 2a, which includes at least one light source 4 of the lighting device 3.

[0064] - Second layer 11, the second layer 11 includes photovoltaic module 5;

[0065] - The third layer 12 includes the energy storage device 6, also known as a rechargeable battery, and

[0066] - A fourth layer 13 forming the hidden surface 20b of the dial 2a, which includes the control unit 7.

[0067] Compared to the second, third, and fourth layers 11, 12, and 13, the first layer 10 of this component 9a is preferably rigid or semi-rigid, while the second, third, and fourth layers 11, 12, and 13 are preferably soft or flexible. It should be understood here that this first layer 10 helps to structurally reinforce component 9a, and therefore dial 2a.

[0068] In this component 9a, the first, second, third and fourth layers 10, 11, 12 and 13 each include an upper surface and a lower surface.

[0069] The first layer 10 is formed of a rigid or semi-rigid substrate that is transparent or translucent, or at least partially transparent or at least partially translucent. Such a substrate is made of a material whose transmittance to solar radiation, particularly ultraviolet radiation (also known as UVT, "ultraviolet transmission"), is between 65% and 95%. This transmittance is preferably 85%. Such a material can be transparent or translucent. In a non-exhaustive and non-limiting manner, this material can be a polymer, glass, or ceramic.

[0070] In this context, it should be understood that this substrate is configured such that:

[0071] - Light generated by the at least one light source can escape to the outside of the dials 2a, 2b, and therefore of the table 1, and

[0072] - Light from the surrounding environment in Table 1 can penetrate the dials 2a and 2b toward the photovoltaic module 5 of the lighting device 3. When this light is from a natural source, it includes solar radiation.

[0073] In other words, this transparent or semi-transparent substrate is configured to allow solar radiation to pass through in order to power the photovoltaic module 5, so that the photovoltaic module 5 can convert the solar energy from this radiation into electrical energy.

[0074] This first layer 10 also includes at least one light source 4 disposed in the body of the substrate. Such arrangement of the light source 4 in this substrate is configured to provide illumination of all or part of the visible surface 20a of the dial 2a. For example, illumination of a graphical representation of reference (or display) elements such as numbers, indexes, lines, dots, etc., illumination of one or more hands, or illumination of all or part of the visible surface of the dial 2a. In one variation, the light source 4 may have a predetermined shape, such as the shape of numbers, letters, indexes, lines, dots, logos, or text.

[0075] When the light source 4 is arranged in a cavity defined in the substrate, this illumination can be backlighting or semi-direct illumination. More precisely, the cavity can be a blind opening formed in the lower surface of the substrate. In this configuration, when the back side of the cavity includes a graphic representation, the light radiation or light generated by the light source 4 can escape through the visible surface 20a of the dial 2a to the outside of the dial 2a, thus allowing at least one graphic representation to be viewed in the dark. In particular, the light radiation escaping from the visible surface 20a outlines the shape of this graphic representation. In this context, the graphic representation included in or on the upper or lower surface of the substrate forming the first layer 10 is preferably opaque or non-transparent or opaque.

[0076] When the light source 4 is arranged in a cavity defined in the substrate, this illumination can be direct illumination. This cavity can be a blind opening formed in the lower surface of the substrate, with no patterned representation on its back side. In this configuration, the light radiation or light generated by the light source 4 can pass through the back side of this cavity toward the outside of the dial 2a, and thus escape through the visible surface 20a of the dial 2a.

[0077] When the light source 4 is arranged in a through-hole extending through the thickness of the substrate of the first layer 10, this illumination can also be direct illumination, with the through-hole opening leading to the upper and lower surfaces of the substrate at its two ends, respectively. In this configuration, all or part of the light source 4 can protrude from the upper surface of the substrate, and thus from the first layer 10 or from the visible surface 20a of the dial 2a, to form graphical representations such as indexes, numbers, dots, lines, etc.

[0078] Such illumination can also be remote illumination when at least one light source 4 is coupled to at least one waveguide. This waveguide (also called an optical guide) allows light to be carried from its point of entry into the guide to a substrate or a region of the substrate near its upper surface (e.g., a cavity, a through-hole). Such an optical guide can be an optical fiber, which allows light to bypass any obstacles that may exist in the substrate, such as between the electroluminescent element and a region of the substrate near its upper surface, through which the light will escape. In this variation, light is thus carried from the electroluminescent element to the region of the substrate to be illuminated via the waveguide.

[0079] In this configuration, the first end of the waveguide is connected to the light source 4, and the second end of the waveguide can be arranged in the following part:

[0080] - A cavity, which may be a blind opening formed in the lower surface of the substrate of this first layer 10, or

[0081] - A through opening extending through the thickness of the substrate of the first layer 10 and opening at both ends to the substrate, and thus to the upper and lower surfaces of the first layer 10. Thus, this second end can protrude from the substrate or the upper surface of the first layer 10 or from the visible surface 20a of the dial 2a, in order to form, for example, a graphical representation of the dial 2a, such as, for example, reference elements such as indexes, numbers, dots, lines, etc.

[0082] In this context, indirect illumination can be achieved by a single light source 4, which is included on the lower surface of the substrate of the first layer 10 and connected to several waveguides, with its second end arranged in the following portion:

[0083] - Each cavity emits light radiation from the light source 4, which escapes to the outside of the dial 2a via the visible surface 20a, thus enabling at least one graphic representation to be viewed in the dark. In this context, this graphic representation, including in or on the upper surface of the visible surface 20a or the substrate of the dial 2a, is preferably opaque, and / or

[0084] - A through opening, which may or may not protrude from the upper surface of the substrate to form reference elements such as indexes, lines or dots, and each emits light radiation from the light source 4.

[0085] In this first layer 10, the light source 4 is applied / fixed to the lower surface of the substrate of this first layer 10, in the cavity, or on the inner wall of the previously mentioned through opening by printing or evaporation.

[0086] In addition, it should be noted that the lower surface of this first layer 10 may be self-adhesive, so that it can be assembled to the second layer 11.

[0087] In this component 9a, the second layer 11 includes a substrate on which the photovoltaic module 5 is mounted. Such a substrate is preferably flexible or soft. The substrate of the second layer 11 may be a film on which the photovoltaic module 5 is mounted, or it may be made of a material belonging to the polymer family.

[0088] In this second layer 11, the photovoltaic module 5 preferably extends over the entire area of ​​the upper surface of this substrate, referred to as the active region. This active region is a portion of the upper surface of the substrate, capable of receiving light from the lower surface of the first layer 10 of the dial 2a. This light, which has passed through all or part of the first layer 10, originates from the dial 2a and therefore from the external environment of Table 1, which, in this case, is primarily from solar radiation when it is a natural source.

[0089] It should be noted that the photovoltaic module 5 is applied to the upper surface of this substrate using inkjet or screen printing methods or thermal evaporation printing methods. Reference will be made here to the second layer 11, which includes the printed photovoltaic module 5. Specifically, the photovoltaic module 5 is printed on the substrate of the second layer 11.

[0090] Note that once the photovoltaic module 5 has been applied to the substrate, a layer of self-adhesive material can be placed on all or part of the upper and / or lower surface of the substrate. Under these conditions, the second layer 11 can be a self-adhesive layer, which helps facilitate its assembly with other layers, particularly with the first layer 10 and / or the third layer 12 of this component 9a.

[0091] In component 9a, this third layer 12 also includes a preferably flexible or soft substrate, which includes the energy storage device 6 of the autonomous lighting device 3. This substrate of the third layer 12 may be a film thereon including the storage device 6. Such a substrate may be made of a material belonging to the polymer family.

[0092] This accumulator 6 can be a lithium battery or a semiconductor battery. Such an accumulator 6 is applied to the upper surface of this substrate using processes known in the prior art, such as:

[0093] - A method for printing on flexible polymer substrates such as lithium batteries, or

[0094] - For example, a three-dimensional printing method for semiconductor batteries such as semiconductor lithium-metal batteries.

[0095] Reference will be made here to the third layer 12, which includes the printed energy storage device 6. In particular, the energy storage device 6 is printed on the substrate of the third layer 12.

[0096] Therefore, such a method allows for the creation of a third layer 12, including this accumulator 6, which is flexible and ultra-thin.

[0097] Furthermore, it should be noted that once the accumulator 6 has been applied to the substrate, a layer of self-adhesive material can be placed on all or part of the upper and / or lower surfaces of the substrate. Under these conditions, the third layer 12 can be a self-adhesive layer, which helps facilitate its assembly with other layers, particularly with the second layer 11 and / or the fourth layer 13 of this component 9a.

[0098] Note that this accumulator 6 is used to store the electrical energy generated by the photovoltaic module 5 and to release the electrical energy as needed to power the at least one light source 4.

[0099] In this component 9a, the fourth and final layer 13 forms the hidden surface of the dial 2a. This fourth layer 13 is formed from a preferably flexible or soft substrate including the control unit 7. Such a substrate for the fourth layer 13 can be, for example, a flexible PCB on which the control unit 7 is disposed, particularly on the upper surface of this PCB and therefore the substrate. In this context, the construction of the control unit 7 on this upper surface of the substrate can be performed using a three-dimensional printing method or a polymer printing method.

[0100] In the second variant, the component 9b forming the dial 2b includes three interconnecting layers 10, 11, and 14. Therefore, note that this second variant differs from the first variant in that it includes three layers 10, 11, and 14, instead of four layers 10, 11, 12, and 13 as in the first variant. In this second variant, the energy storage 6 of the autonomous lighting device 3 is now included, along with the control unit 7, in the third and final layer 14 of this component 9b.

[0101] The third and final layer 14 of this component 9b, which forms the hidden surface of the dial 2b, is preferably composed of a flexible or soft substrate, on which the accumulator 6 and the electronic circuitry 8 constituting the control unit 7 are constructed, preferably on the upper surface of this substrate. This construction of the accumulator 6 and the control unit 7 on this upper surface of the substrate can be performed using a three-dimensional printing method or a polymer printing method. It should be noted that such a substrate can be, for example, a flexible PCB.

[0102] In summary, in this second variant, component 9b thus includes:

[0103] - First layer 10, the first layer 10 forms the visible surface 20a of the dial 2b, which includes the at least one light source 4 of the lighting device 3;

[0104] - Second layer 11, second layer 11 includes photovoltaic module 5, and

[0105] - The third layer 14 forms the hidden surface 20b of the dial 2b, which includes the accumulator 6 and the control unit 7.

[0106] Note that in this second variant, the first and second layers 10 and 11 are similar to those layers in the first variant of component 9a.

[0107] In addition, refer to Figure 3 and Figure 5 The electronic circuit 8 of the control unit 7 includes a first connecting element 15a, which is connected to a connecting element 16 of the at least one light source 4 for managing the operation of the light source 4. The electronic circuit 8 also includes a second connecting element 15b connected to a first connecting element 17a of the accumulator 6.

[0108] Furthermore, it should be noted that the aforementioned event sensors of the lighting device 3 are preferably arranged in the first layer 10 and / or the last layer 13, 14 of the components 9a, 9b, and are connected to the control unit 7 of this device 3.

[0109] In a third variant (not shown), the dial assembly includes two interconnecting layers. Note that this third variant differs from the second variant in that it includes two layers, instead of three layers 10, 11, and 14 as in the second variant. In this third variant, the photovoltaic module 5 of the autonomous lighting device 3 is now included in the first layer, and particularly on the lower surface of the substrate forming this first layer. This photovoltaic module 5 can be applied to this lower surface of the substrate of this first layer using inkjet or screen printing methods or using thermal evaporation printing methods. Therefore, it should be noted that this first layer is similar to the first layer 11 of the first and second variants, except that in this third variant, the first layer additionally includes the photovoltaic module.

[0110] Furthermore, in the third variation, and similar to the second variation, the energy accumulator 6 of the autonomous lighting device 3 is included together with the control unit 7 in the second and final layer of this assembly. This second layer, forming the hidden surface of the dial, is preferably composed of a flexible or pliable substrate, on which the accumulator 6 and the electronic circuitry 8 constituting the control unit 7 are constructed, preferably on the upper surface of this substrate. This construction of the accumulator 6 and the control unit 7 on the upper surface of the substrate can be performed using a three-dimensional printing method or a polymer printing method. It should be noted that such a substrate can be, for example, a flexible PCB.

[0111] In summary, in this third variation, the component then includes:

[0112] - A first layer, forming the visible surface 20a of the dial, which includes at least one light source 4 of the lighting device 3 and a photovoltaic module 5, and

[0113] - The second layer forms the hidden surface 20b of the dial, which includes the accumulator 6 and the control unit 7.

[0114] It goes without saying that this invention is not limited to the embodiments just described, and those skilled in the art can consider various simple modifications and variations without departing from the scope of this invention as defined by the appended claims.

Claims

1. A dial (2a, 2b) of a watch (1) including an autonomous lighting device (3), characterized in that, The autonomous lighting device (3) includes the following functional components: - At least one light source (4), - Autonomous electrical power supply unit (21), and - A control unit (7) for managing the operation of the at least one light source (4), The dials (2a, 2b) are formed of a plurality of stacked components (9a, 9b) connected together and each including one or more functional elements of the autonomous lighting device (3). The components (9a, 9b) are formed by a first layer (10) of a visible surface (20a) forming the dial (2a, 2b), the first layer (10) including at least one light source (4). The components (9a, 9b) include a second layer (11), which includes photovoltaic modules (5) constituting an autonomous electrical power supply unit (21). The component (9a) includes a third layer (12), which includes an energy storage device (6) constituting an autonomous electrical power supply unit (21).

2. The dial (2a, 2b) according to claim 1, characterized in that, The first layer (10) is configured to be passed through by light radiation, either entirely or partially.

3. The dial (2a, 2b) according to claim 1, characterized in that, The first layer (10) is configured to be fully or partially penetrated by solar radiation.

4. The dial (2a, 2b) according to claim 1, characterized in that, The first layer (10) is completely or partially transparent or semi-transparent.

5. The dial (2a, 2b) according to claim 1, characterized in that, The second layer (11) includes a substrate on which the photovoltaic module (5) is printed.

6. The dial (2a, 2b) according to claim 1, characterized in that, The photovoltaic module (5) is placed on the active region of the second layer (11), which is configured to receive light rays from the first layer (10) of the components (9a, 9b).

7. The dial (2a) according to claim 1, characterized in that, The third layer (12) includes a substrate on which the energy storage device (6) is printed.

8. The dial (2a) according to claim 1, characterized in that, The component (9a) includes a fourth layer (13) that forms a hidden surface (20b) of the dial (2a), the hidden surface (20b) including the control unit (7).

9. The dial (2b) according to claim 1, characterized in that, The component (9b) includes a third layer, which includes a hidden surface (20b) of the dial (2a), the hidden surface (20b) including the control unit (7) and an energy accumulator (6) constituting the autonomous electrical power supply unit (21).

10. The dial (2a, 2b) according to claim 1, characterized in that, The first layer (10) is rigid relative to the other layers included in the components (9a, 9b), which are flexible.

11. A table (1), characterized in that, The table includes a dial (2a, 2b) according to any one of the preceding claims 1-10.

12. The table (1) according to claim 11, characterized in that, The watch includes a mechanical, electromechanical, or electronic watch movement.

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