Pair of adaptive spectacles and method for controlling such a pair of adaptive spectacles

Abstract

The invention relates to a pair of adaptive spectacles (1) comprising a first lens (100a), a second lens (100b), a first electronic control device (40) comprising a first wireless communication member (45), and a second electronic control device (50) comprising a second wireless communication member (55); the first wireless communication member (45) and the second wireless communication member (55) being configured to exchange a set of data between them; the first electronic control device (40) and the second electronic control device (50) being further configured to vary the optical power of the first lens (100a) and the optical power of the second lens (100b), respectively, as a function of the set of data. The invention also relates to a method for controlling such a pair of adaptive spectacles (1).

Description

[0001] DESCRIPTION

[0002] TITLE: Pair of adaptive glasses and method of controlling such a pair of adaptive glasses.

[0003] Technical field of the invention

[0004] The present invention relates to a pair of adaptive glasses comprising two lenses, as well as a control method for controlling such a pair of adaptive glasses.

[0005] State of the art

[0006] The invention relates to the field of adaptive glasses. Generally speaking, such adaptive glasses are used in the field of optical correction, particularly for patients with ocular accommodation problems (presbyopia, accommodation spasm, after cataract surgery, etc.). However, such an application is not limiting because such adaptive glasses can, for example, be used in the field of virtual reality or augmented reality.

[0007] The state of the art offers several solutions to compensate for the lack of accommodation in patients with presbyopia, such as glasses, contact lenses, or intraocular lenses, for example. Patients can wear bifocal glasses comprising bifocal lenses that have an insert in their lower part, which ensures near vision when the user looks downwards. These bifocal glasses are essentially reading glasses, and have the disadvantage of providing poor intermediate vision. It is also possible to opt for progressive lenses that have a continuum of corrections ranging from the lower part (reading) to the upper part, they allow some intermediate vision. However, the intermediate vision is clear only within a narrow area, called the "corridor" of vision, the outside being blurred.Furthermore, progressive lenses have the limitation of significantly distorting images, by curving straight lines. Considering that 3 diopters are required for perfect vision between distance and near vision for people with fully developed presbyopia, progressive lenses still suffer from a lack of image quality.

[0008] For contact lenses or intraocular lenses, there is a treatment called "monovision," which involves adjusting the contact lenses to two different distances for the left and right eyes. This is obviously a compromise that can be uncomfortable, but a user can wear compensating glasses for a given fixed object distance (reading, intermediate, or distance). The other option is based on what is called multifocal optics: multiple images corresponding to near and far distances are projected onto the retina. The multifocal solution allows reading and vision at near and far distances, but always with somewhat degraded image quality. With this solution, blurred images can be problematic, for example when driving at night.

[0009] Finally, it is known from the state of the art to use adaptive glasses comprising electronic elements allowing to correct the optical power of the lenses. A very large proportion of electronic glasses (or "Smart eye-wears" according to the established Anglo-Saxon terminology), or virtual or augmented reality masks, house all or part of the electronics in one or more of the branches of the glasses. In certain applications, an active function is thus emulated, in order to make a projection or an optical function only on one side. However, other, more sophisticated glasses, require to have an optical function (for example focusing, for presbyopia) which is carried out on both eyes at the same time, and in a coordinated manner. In the case of presbyopia, it will be desirable to adjust synchronously the focus correction function on both eyes.In the case of video or music content, you will obviously want perfect synchronization of the content on both sides of the pair of glasses. One solution to achieve this synchronization is to use individual electrical wires, in ribbons or conductive tracks on a flexible element to transmit information or optical power from one side of the pair of glasses to the other.

[0010] Although such an architecture is satisfactory in that it allows transmission of power and information from one side of the pair of glasses to the other, it makes the precise balance of the electrical masses of the embedded electronic elements difficult. Furthermore, it is possible that the design and production of a model of glasses is complicated by the positioning and connection of the electronic elements embedded on the glasses, particularly when information or power is transmitted at the front face by conductors.

[0011] Subject of the invention

[0012] The present invention aims to propose a solution that addresses all or part of the aforementioned problems. This aim can be achieved by implementing a pair of adaptive glasses comprising: a front face comprising a first lens and a second lens; a first branch extending between a first free end portion and a first connecting end portion, said first branch cooperating with the front face at the first connecting end portion; a second branch distinct from the first branch extending between a second free end portion and a second connecting end portion, said second branch cooperating with the front face at the second connecting end portion, on the side opposite the first branch relative to the front face;a first electronic control device comprising a first computer, a first battery, and a first wireless communication device; a second electronic control device separate from the first electronic control device comprising a second computer, a second battery, and a second wireless communication device.;

[0013] The first wireless communication device and the second wireless communication device are configured to exchange with each other a set of data comprising at least one parameter chosen from: at least a distance between the pair of adaptive glasses and an external object, a focusing distance, a command from a user of the pair of adaptive glasses, an optical power value of the first lens, and an optical power value of the second lens, the first electronic control device and the second electronic control device being further configured to vary respectively the optical power of the first lens and the optical power of the second lens as a function of said set of data.

[0014] The arrangements described above make it possible to propose a pair of adaptive glasses with variable optical power for which coordination between the first lens and the second lens is achieved via wireless communication devices. Thus, it is possible to adjust and coordinate the correction provided by the lenses, which may for example be variable ophthalmic lenses, without requiring the presence of electrical wires passing through the front face.

[0015] Generally speaking, when referring to "optical power" applied to the first lens, applied to the second lens, or synchronization optical power, it is understood that this is an optical power added by the first lens or the second lens. In other words, it is also possible to use instead of the terms "optical power", the terms "dynamic optical power", or "added optical power", or "dynamic addition".

[0016] The pair of adaptive glasses may further have one or more of the following characteristics, taken alone or in combination.

[0017] According to one embodiment, the data set comprises any data or parameter useful for the operation of electro-variable lenses, for example: an indirect measurement of eye convergence, or pupil size, position of the pupils of the wearer of the pair of adaptive glasses, brightness data, perception of the environment, temperature.

[0018] According to one embodiment, the first electronic control device and the second electronic control device are configured to vary respectively the optical power of the first lens and the optical power of the second lens according to said data set via a technology using liquid crystals.

[0019] According to one embodiment, the electronic control device is configured to vary the optical power of said at least one lens chosen from the first lens and the second lens by means of a correction member comprising liquid crystals, said correction member being configured to allow the orientation of said liquid crystals by the application of an electric field in order to change the refractive index of said at least one lens.

[0020] The skilled person may, for example, refer to the following document: “Li, Guoqiang, et al. ''Switchable electro-optic diffractive lens with high efficiency for ophthalmic applications.'' Proceedings of the National Academy of Sciences 103.16 (2006): 6100-6104”, describing a technology using liquid crystals to vary the optical power of a lens.

[0021] According to one embodiment, at least one lens selected from the first lens and the second lens is an ophthalmic lens.

[0022] According to one embodiment, the optical power value of the first lens exchanged between the first wireless communication member and the second wireless communication member is determined by a calculator selected from among the first calculator and the second calculator. For example, the optical power value of the first lens may be proportional to the inverse of a distance between the first branch and an external object.

[0023] According to one embodiment, the optical power value of the second lens exchanged between the first wireless communication member and the second wireless communication member is determined by a calculator selected from among the first calculator and the second calculator. For example, the optical power value of the second lens may be proportional to the inverse of a distance between the second branch and an external object.

[0024] According to one embodiment, the optical power value of the second lens is equal to the optical power value of the first lens.

[0025] For example, said optical power values ​​of the first lens and the second lens may be proportional to the inverse of the smallest distance between a distance separating the first branch from an external object, and a distance separating the second branch from the same or another external object. In the particular case of ophthalmic lenses, the result of the calculation of the inverse of the distance expressed in meters may be limited by the patient's addition, said addition being expressed in diopters. The patient's addition quantifies his need for optical power correction during accommodation, and it is representative of the evolution of presbyopia. Generally, a low addition denotes the beginning of presbyopia, and a high addition (3D) denotes the end of the evolution of presbyopia.

[0026] According to one embodiment, the pair of adaptive glasses is configured to correct presbyopia.

[0027] According to one embodiment, the pair of adaptive glasses is a virtual reality or augmented reality mask.

[0028] It is understood that the previously described arrangements allow the first wireless communication device and the second wireless communication device to communicate with each other without necessarily requiring connection to an element external to the glasses such as a smartphone, or any other type of control unit.

[0029] According to one embodiment, the pair of adaptive glasses is symmetrical with respect to a plane passing through a nasal portion of the front face. Thus, any technical characteristic of the first branch, the first lens, and the first electronic control device can apply to the second branch, the second lens, and the second electronic control device. Generally, the first electronic control device is arranged on the first branch, and the second electronic control device is arranged on the second branch.

[0030] In this way, the first branch and the second branch can operate with energy autonomy. This makes it possible to propose a pair of adaptive glasses, where each lens is controlled by an associated electronic control device. In particular, in the case where the exchange of the data set is no longer possible between the first wireless communication device and the second wireless communication device, the pair of adaptive glasses can continue to operate in a degraded mode or each branch of the pair of adaptive glasses is autonomous.

[0031] Advantageously, the arrangement of the first electronic control device on the first branch and the second electronic control device on the second branch allows a greater variety of designs to be designed for the front face, particularly when this concerns a nasal portion of the front face arranged at the user's nose between the first lens and the second lens. Indeed, having connecting wires in the front face imposes constraints on the materials, shapes, and attachments of the nasal portion. Such a constraint is therefore absent for the pair of adaptive glasses.

[0032] Furthermore, the arrangement of the first electronic control device on the first branch and of the second electronic control device on the second branch makes it possible to guarantee a good balance of the electrical masses between the first electronic control device and the second electronic control device.

[0033] According to one embodiment, at least one lens selected from the first lens and the second lens comprises: a primary glass comprising a first transparent material, and having a first primary surface and a second primary surface, said primary glass being configured to transmit light between the first primary surface and the second primary surface; a secondary glass comprising a second transparent material, and having a first secondary surface and a second secondary surface, said secondary glass being configured to transmit light between the first secondary surface and the second secondary surface; a main chamber delimiting a main volume comprised between the second primary surface and the first secondary surface;and a membrane comprising a deformable portion, said deformable portion being at least partially comprised in the main chamber, and completely separating the main chamber into at least a first lens chamber configured to comprise at least one primary fluid and a second lens chamber configured to comprise at least one secondary fluid, the first lens chamber being comprised between the second primary surface and the deformable portion, and the second lens chamber being comprised between the deformable portion and the first secondary surface.;

[0034] According to one embodiment, the general architecture and operation of said at least one lens can be deduced by a person skilled in the art based on document W02018 / 007425.

[0035] According to one embodiment, said at least one lens selected from the first lens and the second lens comprises a primary fluid passage comprising a primary channel configured to transport the primary fluid and to open into the first lens chamber; and a secondary fluid passage comprising a secondary channel configured to transport the secondary fluid and to open into the second lens chamber.

[0036] According to one embodiment, the electronic control device is configured to vary the optical power of said at least one lens selected from the first lens and the second lens via a fluid displacement member configured: to allow the displacement of the primary fluid towards the first lens chamber or out of the first lens chamber through the primary fluid passage; and / or to allow the displacement of the secondary fluid towards the second lens chamber or out of the second lens chamber through the secondary fluid passage.

[0037] According to one embodiment, the fluid displacement member is an electrostatically actuated device of the type described in the embodiments described in document WO2018 / 041866.

[0038] According to one embodiment, the pair of adaptive glasses comprises at least one measuring system configured to detect the presence of an external object, and to communicate to at least one electronic control device chosen from the first electronic control and command device and the second electronic control device, a value of a distance separating said at least one measuring system and said external object.

[0039] According to one embodiment, the data set comprises the value of the distance separating the measuring system and the external object.

[0040] According to one embodiment, the data set comprises an estimated value of the focusing distance. For example, such an estimated value of the focusing distance can be determined by an eye-tracking system, or "Eye-T racking" according to the established Anglo-Saxon terminology.

[0041] According to one embodiment, said at least one measuring system is a time of flight sensor (or ToF for “Time of Flight” according to the established Anglo-Saxon term).

[0042] According to one embodiment, said at least one measuring system is a distance sensor.

[0043] According to one embodiment, said at least one measuring system comprises at least one viewing angle sensor configured to determine the value of a distance separating said at least one measuring system and said external object by an angle measurement.

[0044] According to one embodiment, the at least one measuring system is arranged on at least one connecting end portion chosen from the first connecting end portion and the second connecting end portion.

[0045] According to one embodiment, the pair of adaptive glasses comprises a first measuring system arranged on the first branch, for example at the first connecting end portion; and a second measuring system arranged on the second branch, for example at the second connecting end portion.

[0046] According to one embodiment, the measurement system is configured to detect the presence of the external object when said external object is arranged in a detection volume of the measurement system. For example, said detection volume is delimited by a cone having a vertex coinciding with the measurement system, and a directing line directed in a direction of observation of the use of the pair of adaptive glasses. In other words, the detection volume is directed towards the front of the pair of adaptive glasses.

[0047] According to one embodiment, the first electronic control device and the first measuring system are arranged on the first branch, and the second electronic control device and the second measuring system are arranged on the second branch so that the front face is devoid of an electronic element.

[0048] In this way, it is possible for an eyewear manufacturer to design and draw a new frame for the pair of adaptive glasses while retaining the possibility of controlling the lenses via the first and second electronic control devices arranged on the first and second arms.

[0049] According to one embodiment, at least a portion of the first branch is configured to pivot relative to the front face via a first hinge, at least a portion of the second branch is configured to pivot relative to the front face via a second hinge, the first wireless communication member, and the second wireless communication member are electrically connected respectively to a first antenna and to a second antenna, said first and second antennas being configured to allow the exchange of the data set between the first wireless communication member and the second wireless communication member; the first antenna being included in the first hinge, and the second antenna being included in the second hinge.

[0050] According to one embodiment, the first antenna and the second antenna are arranged respectively at the first connection end portion and at the second connection end portion.

[0051] In this way, it is possible to exchange the data set using extremely low radio power to establish communication between the first wireless communication device and the second wireless communication device. In addition, the positioning at the front face of the first antenna and the second antenna minimizes the amount of waves absorbed by the head of the user of the pair of adaptive glasses. Generally, sufficient power radiated by the first antenna or the second antenna is approximately 50 pW, which corresponds to an emitted power that is several orders of magnitude below the standards in force.

[0052] Advantageously, the inclusion of the first antenna in the first hinge makes it possible to simplify the architecture of the first wireless communication device.

[0053] According to one embodiment, the first computer comprises a first microcontroller. According to one embodiment, the second computer comprises a second microcontroller.

[0054] According to one embodiment, at least one antenna chosen from the first antenna and the second antenna is electrically connected to at least one electronic control device chosen from the first electronic control device and the second electronic control device, via a flexible circuit so as to allow the transmission of the data set.

[0055] According to one embodiment, the first hinge and the second hinge comprise a metallic material.

[0056] According to one embodiment, the first hinge and the second hinge have an elongated shape along an axis parallel to a hinge axis, such that the first hinge is parallel to the second hinge.

[0057] Thus, and advantageously, the fact that the first hinge and the second hinge are positioned as two parallel segments separated by a few centimeters makes it possible to optimize the coupling between the first antenna and the second antenna.

[0058] According to one embodiment, the first hinge constitutes the first antenna, and / or the second hinge constitutes the second antenna.

[0059] It is therefore well understood that the first hinge and / or the second hinge serve as antennas to enable the exchange of data between the first wireless communication device and the second wireless communication device. The design of the pair of adaptive glasses is therefore simplified.

[0060] According to one embodiment, the first antenna is arranged at the first connection end portion, and the second antenna is arranged at the second connection end portion.

[0061] According to one embodiment, the first wireless communication means and the second wireless communication means are configured to exchange the data set with each other via a wireless transmission technique. For example, the wireless transmission technique includes Bluetooth low energy, near field magnetic field communication, near field communication, ultrasound, electromagnetic waves of other frequencies, or any other means.

[0062] According to one embodiment, at least one electronic control device selected from the first electronic control device and the second electronic control device comprises a user interface configured to receive at least one command from the user of the pair of adaptive glasses, said at least one command being configured to be included in the data set.

[0063] The aim of the invention can also be achieved by implementing a control method for controlling a pair of adaptive glasses of the type of one of those described above, the control method comprising: a reception step in which a set of data is received by at least one electronic control device chosen from the first electronic control device and the second electronic control device, said set of data comprising at least one parameter chosen from: a distance between the pair of adaptive glasses and an external object, a focusing distance, a command from a user of the pair of adaptive glasses, an optical power value of the first lens, and an optical power value of the second lens;an exchange step, in which the data set is exchanged by a wireless transmission technique between the first wireless communication means and the second wireless communication means;an optical power correction step, in which the optical power of the first lens and the optical power of the second lens are corrected according to the data set. The previously described arrangements make it possible to propose a control method for controlling a pair of adaptive glasses in order to adapt the correction provided by the pair of glasses in relation to a data set received by the pair of adaptive glasses. Such a method makes it possible in particular to correct presbyopia, or to coordinate the vision provided by virtual reality glasses. In the case of optical correction, the method is advantageous in that it makes it possible to provide an optical correction which is carried out on the two ophthalmic lenses and in a coordinated manner.;

[0064] The control method may further have one or more of the following features, taken alone or in combination.

[0065] According to one embodiment, during the optical power correction step, the optical power of at least one lens chosen from the first lens and the second lens is corrected by applying an electric field in order to change the refractive index of said at least one lens.According to one embodiment, the exchange step comprises the following steps, implemented simultaneously or not: a first transmission step in which the first wireless communication device transmits at least one first parameter of the data set to the second wireless communication device; a second transmission step in which the second wireless communication device transmits at least one second parameter of the data set to the first wireless communication device; a first reception step in which the first wireless communication device receives said at least one second parameter of the data set transmitted by the second wireless communication device; a second reception step in which the second wireless communication device receives said at least one first parameter of the data set transmitted by the first wireless communication device.

[0066] According to one embodiment, the optical power correction step is implemented so as to make the optical power value of the first lens and the second lens tend towards the same optical power value. In this way, the optical correction made to the two lenses is identical at the end of the optical power correction step, the user's viewing comfort is then improved.

[0067] According to one embodiment, the control method comprises a step of determining a synchronization optical power, the optical power correction step then comprising correcting the optical power of the first lens and the second lens so that the optical power of said lenses is equal to the synchronization optical power thus determined.

[0068] According to one embodiment, the step of determining a synchronization optical power comprises at least one of the following steps: a first step of calculating a first desired optical power value, equal to the inverse of a first distance between the pair of adaptive glasses and an external object; a second step of calculating a second desired optical power value, equal to the inverse of a second distance between the pair of adaptive glasses and an external object; a step of selecting the synchronization optical power, in which the synchronization optical power is determined to be equal to the largest value between the first desired optical power value, and the second desired optical power value.

[0069] According to one embodiment, the optical power correction step is implemented during a correction period strictly less than 2 s, and in particular less than or equal to 1 s.

[0070] In this way, it is possible to synchronize the optical powers of the two lenses in a correction period comparable to the time of adaptation of the focus, or of the convergence of the eyes.

[0071] According to one embodiment, during the optical power correction step, the optical power of the at least one lens chosen from the first lens and the second lens is corrected by deforming the deformable part of the membrane into a corrected position, said corrected position corresponding to a deformation of the deformable part so as to vary a volume of the first lens chamber, and a volume of the second lens chamber.

[0072] According to one embodiment, the optical power correction step is implemented such that the optical power of the first lens is substantially equal to the optical power of the second lens.

[0073] According to one embodiment, the deformation of the deformable part of the membrane is carried out by a variation in capacitance between two electrodes offset relative to the membrane. Thus, the optical power correction step may comprise a step of establishing a capacitance value in which a capacitance variation value is determined. For example, said capacitance variation value to be provided for the correction may be determined by a correspondence table recorded in a memory of the first electronic control device and / or the second electronic control device. Said correspondence table being configured to associate an optical power value to be applied to the lens with a capacitance value to be applied between the two electrodes.The step of correcting the optical power may then comprise a step of applying said capacitance variation value between the two electrodes, so as to cause a displacement of the deformable part of the membrane.

[0074] According to one embodiment, the control method comprises a step of updating the correspondence table.

[0075] According to one embodiment, the pair of adaptive glasses comprises at least one measuring system configured to detect the presence of an external object, and in which the step of receiving a set of data comprises: a measuring step in which a distance is measured between the measuring system and the external object, and a communication step in which said distance is communicated by the measuring system to at least one electronic control device chosen from the first electronic control device and the second electronic control device, the set of data then comprising said distance.

[0076] According to one embodiment, the first electronic control device is electrically connected to a first measuring system, and the second electronic control device is electrically connected to a second measuring system, the measuring step comprising a first measuring step in which a first distance is measured between the first measuring system and the external object, and a second measuring step in which a second distance is measured between the second measuring system and the external object; the communicating step then comprising the communication of the first distance by the first measuring system to the first electronic control device and the communication of the second distance by the second measuring system to the second electronic control device, the data set then comprising said first distance and the second distance.

[0077] Thus and advantageously, the optical power correction step allows both the correction made during this step to be synchronized at all times between the first lens and the second lens, and also allows the exchange of the data set which includes the data measured by the first measuring system and the second measuring system equipping the first branch and the second branch respectively. This is particularly advantageous for improving the correction of the pair of adaptive glasses because the first measuring system and the second measuring system measure different data on the first branch and on the second branch. In a synergistic manner, the measurement of the first distance by the first measuring system and the second distance by the second measuring system makes it possible to obtain measurement redundancy making this measurement more reliable.

[0078] According to one embodiment, the control method further comprises a data encryption step implemented before the exchange step, in which the data set is encrypted, the exchange step then comprising the exchange of the encrypted data set between the first wireless communication device and the second wireless communication device.

[0079] In this way, it is possible to prevent two pairs of adaptive glasses located close to each other from exchanging their data sets. Furthermore, it is also possible to prevent the data set from being consulted by any other detection system.

[0080] Summary description of the drawings

[0081] Other aspects, aims, advantages and characteristics of the invention will appear better on reading the following detailed description of preferred embodiments thereof, given by way of non-limiting example, and made with reference to the appended drawings in which:

[0082] Figure 1 is a schematic view of the pair of adaptive glasses seen from above according to one embodiment of the invention.

[0083] Figure 2 is a schematic perspective view of the pair of adaptive glasses, according to one embodiment of the invention.

[0084] Figure 3 is a schematic sectional view of a lens of the pair of adaptive glasses according to one embodiment of the invention.

[0085] Figure 4 is a schematic view of a fluid displacement member according to one embodiment of the invention.

[0086] Figure 5 is a schematic view of a control method according to one embodiment of the invention.

[0087] Detailed description

[0088] In the figures and in the remainder of the description, the same references represent identical or similar elements. In addition, the different elements are not shown to scale so as to enhance the clarity of the figures. Furthermore, the different embodiments and variants are not mutually exclusive and can be combined with each other.

[0089] As illustrated in Figures 1 and 2, the invention relates to a pair of adaptive glasses 1. The pair of adaptive glasses 1 comprises a front face 3 comprising a first lens 100a and a second lens 100b. The first lens 100a is generally included in a first circle which is connected with a second circle including the second lens 100b, by means of a bridge forming all or part of a nasal portion 5 of the front face 3.

[0090] The pair of adaptive glasses 1 further comprises a first branch 10 extending between a first free end portion 11, also called the first sleeve, and a first connecting end portion 12. The first branch 10 cooperates with the front face 3 at the first connecting end portion 12. For example, at least a portion of the first branch 10 is configured to pivot relative to the front face 3 via a first hinge 14. More particularly, it is possible for the entirety of the first branch 10 to cooperate by pivoting with the front face 3 via the first hinge 14. The first hinge 14 then comprises a first tenon fixed to an outer end of the first rim opposite the nasal portion 5 relative to the second rim.The pair of adaptive glasses 1 also comprises a second branch 30 distinct from the first branch 10 extending between a second free end portion 31, also called the second sleeve, and a second connecting end portion 32. The second branch 30 then cooperates with the front face 3 at the second connecting end portion 32, on the side opposite the first branch 10 relative to the front face 3. In the same way as for the first branch 10, the second branch 30 can cooperate by pivoting with the front face 3 via a second hinge 34. For example, the second hinge 34 can comprise a second tenon fixed to an external end of the second rim opposite the nasal portion 5 relative to the first rim. In general, the first hinge 14 and / or the second hinge 34 comprise a larger dimension of the order of a few centimeters, and comprise a metallic material.

[0091] As illustrated in Figure 1, the pair of adaptive glasses 1 can be symmetrical with respect to a plane denoted “X” passing through the nasal part 5 of the front face 3. Thus, in the remainder of the description, any technical characteristic of the first branch 10 or of the elements associated with it, and of the first lens 100a can apply to the second branch 30, and to the second lens 100b.

[0092] Generally, the first electronic control device 44 and the second electronic control device 45 are configured to vary respectively the optical power of the first lens 100a and the optical power of the second lens 100b as a function of said data set via a correction member 701, or a fluid displacement member 700.

[0093] Thus, according to a first variant, the electronic control device 44, 45 is configured to vary the optical power of at least one lens chosen from the first lens 100a and the second lens 100b by means of a correction member 701 comprising liquid crystals. The correction member 701 may in particular be configured to allow the orientation of said liquid crystals by the application of an electric field in order to change the refractive index of said at least one lens.

[0094] The skilled person may, for example, refer to the following document: “Li, Guoqiang, et al. “Switchable electro-optic diffractive lens with high efficiency for ophthalmic applications.” Proceedings of the National Academy of Sciences 103.16 (2006): 6100-6104”, describing a technology using liquid crystals to vary the optical power of a lens.

[0095] According to a second variant, illustrated in FIG. 3, at least one lens chosen from the first lens 100a and the second lens 100b is an ophthalmic lens corresponding to one of the embodiments described in document WO2018 / 007425.

[0096] Generally, the first lens 100a and the second lens 100b have an identical architecture and comprise a primary glass 120, a secondary glass 160, a main chamber 140, a membrane 400, a primary fluid and a secondary fluid.

[0097] The primary lens 120 may include a first transparent material, and have a first primary surface 210 and a second primary surface 220. These surfaces may be configured to transmit light from one side or from one end to the other. More specifically, the primary lens 120 may be configured to transmit light from the first primary surface 210 to the second primary surface 220 through the first transparent material. The light may travel further and may pass through the primary chamber 140 and the membrane 400 to reach the secondary lens 160. The secondary lens 160 may include a second transparent material, and may have a first secondary surface 610 and a second secondary surface 620. These surfaces may also be configured to transmit light from one side or from one end to the other.More specifically, the secondary glass 160 may be configured to transmit light from the first secondary surface 610 to the second secondary surface 620 through the second transparent material. The main chamber 140 defines a main volume between the second primary surface 220 and the first secondary surface 610 and the main chamber 140 may be defined between the second primary surface 220 and the first secondary surface 610.

[0098] The membrane 400 comprises a deformable portion 470 located at least partially in the main chamber 140, and which separates the main chamber 140 into at least a first lens chamber 110 and a second lens chamber 115. The first lens chamber 110 may be configured to comprise the primary fluid and may be comprised between the second primary surface 220 and the deformable portion 470. On the other side of the membrane 400, between the deformable portion 470 and the first secondary surface 610, is located the second lens chamber 115 which may be configured to comprise the secondary fluid.

[0099] In the embodiment illustrated in Figure 3, said at least one lens selected from the first lens 100a and the second lens 100b comprises a primary fluid passage 111 comprising a primary channel configured to transport the primary fluid and to open into the first lens chamber 110; and a secondary fluid passage 121 comprising a secondary channel configured to transport the secondary fluid and to open into the second lens chamber 115. The primary fluid passage 111, and the secondary fluid passage 121 may be configured to fluidly communicate with a fluid moving member 700 which will be described later.

[0100] Referring again to Figures 1 and 2, the pair of adaptive glasses comprises: a first electronic control device 40 comprising a first computer 41, a first battery 43, and a first wireless communication member 45; and a second electronic control device 50 separate from the first electronic control device 40 comprising a second computer 51, a second battery 53, and a second wireless communication member 55.

[0101] The first wireless communication device 45 and the second wireless communication device 55 are further configured to exchange between them a set of data comprising at least one parameter chosen from: at least a distance between the pair of adaptive glasses 1 and an external object, a focusing distance, a command from a user of the pair of adaptive glasses 1, an optical power value of the first lens 100a, and an optical power value of the second lens 100b.

[0102] As will be detailed later, the first lens 100a and the second lens 100b are respectively characterized by an optical power value that can vary between an initial optical power value and a final optical power value. Initially, the first lens 100a is therefore characterized by a first initial optical power value, and the second lens is characterized by a second initial optical power value. These optical power values ​​can be included in the data set and be exchanged between the first electronic control device 40 and the second electronic control device 50.Subsequently, the first computer 41 and the second computer 51 can determine a synchronization optical power value intended to be exchanged between the first electronic control device 40 and the second electronic control device 50 in order to vary the initial optical power values ​​towards final optical power values ​​which tend towards said synchronization optical power value.

[0103] According to one embodiment, the first computer 41 comprises a first microcontroller, and the second computer 51 comprises a second microcontroller.

[0104] Generally, the first electronic control device 40 is arranged on the first branch 10, and the second electronic control device 50 is arranged on the second branch 30. Figure 1 illustrates in particular an embodiment in which the first computer 41 and the first wireless communication member 45 are arranged on an electronic card at a central position of the first branch 10, and are electrically connected to the first battery 43 which is arranged at the first sleeve, that is to say at the first free end portion 11. Symmetrically, the second computer 51 and the second wireless communication member 55 are arranged on an electronic card at a central position of the second branch 30, and are electrically connected to the second battery 53 which is arranged at the second sleeve, that is to say at the second free end portion 31.

[0105] Advantageously, the arrangement of the first electronic control device 40 on the first branch 10 and of the second electronic control device 50 on the second branch 30 makes it possible to design a greater variety of models for the front face 3. Indeed, having connection wires in the front face 3 imposes constraints on the materials, shapes, and attachments of the nasal part 5. Such a constraint is absent for the pair of adaptive glasses 1 which is the subject of the invention.

[0106] Furthermore, the arrangement of the first electronic control device 40 on the first branch 10 and of the second electronic control device 50 on the second branch 30 makes it possible to guarantee a good balance of the electrical masses between the first electronic control device 40 and the second electronic control device 50, and also makes it possible to balance the weights carried by the pair of adaptive glasses 1.

[0107] Furthermore, the presence of the first battery 43 and the second battery 53 allows the first branch 10 and the second branch 30 to operate with energy autonomy. This makes it possible to propose a pair of adaptive glasses 1, where each lens 100a, 100b is controlled by an associated electronic control device 40, 50.

[0108] In particular, in the case where the exchange of the data set is no longer possible between the first wireless communication device 45 and the second wireless communication device 55, the pair of adaptive glasses 1 can continue to operate in a degraded mode or each branch 10, 30 of the pair of adaptive glasses 1 is autonomous.

[0109] It is well understood that the arrangements previously described allow the first wireless communication member 45 and the second wireless communication member 55 to communicate with each other without necessarily requiring connection to an element external to the glasses such as a smartphone, or any other type of control unit.

[0110] Generally, the first wireless communication device 45 and the second wireless communication device 55 are electrically connected respectively to a first antenna 16 and to a second antenna 36. These first and second antennas 16, 36 are configured to allow the exchange of the data set between the first wireless communication device 45 and the second wireless communication device 55. The first antenna 16 and the second antenna 36 can be electrically connected respectively to the first electronic control device 40 and to the second electronic control device 50 via a flexible circuit so as to allow the transmission of the data set.

[0111] As illustrated in Figures 1 and 2, the first antenna 16 may be included in the first hinge 14, and the second antenna 36 may be included in the second hinge 34. More specifically, the first hinge 14 constitutes the first antenna 16, and the second hinge 34 constitutes the second antenna 36. It is therefore understood that the first hinge 14 and / or the second hinge 34 serve as antennas to allow the exchange of data between the first wireless communication member 45 and the second wireless communication member 55. The design of the pair of adaptive glasses 1 is therefore simplified.

[0112] The arrangements described above make it possible to arrange the first antenna 16 and the second antenna 36 respectively at the first link end portion 12, and at the second link end portion 32. In this way, it is possible to exchange the data set using extremely low radio power to establish communication between the first wireless communication device 45 and the second wireless communication device 55. In addition, the positioning at the front face 3 of the first antenna 16 and the second antenna 36 minimizes the quantity of waves absorbed by the head of the user of the pair of adaptive glasses 1. Generally, the sufficient power radiated by an antenna will be approximately 50 pW, which corresponds to an emitted power which is several orders of magnitude below the standards in force 20 mW.

[0113] According to one embodiment, the first hinge 14 and the second hinge 34 have an elongated shape along an axis parallel to a hinge axis, so that the first hinge 14 is parallel to the second hinge 34. Thus, and advantageously, the fact that the first hinge 14 and the second hinge 34 are positioned as two parallel segments separated by a few centimeters makes it possible to optimize the coupling between the first antenna 16 and the second antenna 36.

[0114] The first wireless communication device 45 and the second wireless communication device 55 are configured to exchange the set of data between them via a wireless transmission technique. For example, the wireless transmission technique includes low-energy Bluetooth called BLE or “Bluetooth Low Energy” according to the established Anglo-Saxon term, near-field magnetic field communication called NFMI or “Near-Field Magnetic Induction communication” according to the established Anglo-Saxon term, near-field communication called NFC or “Near Field Communication” according to the established Anglo-Saxon term, ultrasound, electromagnetic waves of other frequencies, or any other means.

[0115] The first electronic control device 40 and the second electronic control device 50 are further configured to vary respectively the optical power of the first lens 100a and the optical power of the second lens 100b as a function of said data set. For this, it may be provided that the electronic control devices 40, 50 are configured to implement all or part of the steps of the control method which will be described later.

[0116] According to one embodiment, the optical powers of the first lens 100a and the second lens 100b may be varied as a function of a distance between the pair of adaptive glasses 1 and an external object. For this, the pair of adaptive glasses 1 may comprise at least one measuring system 47, 57 configured to detect the presence of an external object, and to communicate to at least one electronic control device chosen from the first electronic control device 40 and the second electronic control device 50, a value of a distance separating said at least one measuring system 47, 57 and said external object. In this case, the data set comprises the value of the distance separating the measuring system 47, 57 and the external object.As shown in Figures 1 and 2, the at least one measuring system 47, 57 is arranged on at least one connecting end portion chosen from the first connecting end portion 12 and the second connecting end portion 32. In order to provide a symmetrical pair of adaptive glasses 1, and to make the distance measurement more reliable, it is generally provided that the at least one measuring system 47, 57 comprises a first measuring system 47 arranged on the first branch 10, for example at the first connecting end portion 12, and a second measuring system 57 arranged on the second branch 30, for example at the second connecting end portion 32.According to this non-limiting variant, the first electronic control device 40 and the first measuring system 47 are arranged on the first branch 10, and the second electronic control device 50 and the second measuring system 57 are arranged on the second branch 30 so that the front face 3 is devoid of any electronic element. In this way, it is possible for an eyewear manufacturer to design and draw a new frame for the pair of adaptive glasses 1 while retaining the possibility of controlling the lenses 100a, 100b via the first and second electronic control devices 40, 50 arranged on the first and second branches 10, 30.

[0117] The type of measurement system 47, 57 used is not limited, and may comprise for example a time of flight or ToF sensor for "Time of Flight" according to the established Anglo-Saxon term, or a viewing angle sensor configured to determine the value of a distance separating said at least one measurement system 47, 57 and said external object by an angle measurement, or any other type of system or sensor making it possible to measure a distance. In particular, the measurement system 47, 57 is configured to detect the presence of the external object when said external object is arranged in a detection volume of the measurement system 47, 57. For example, said detection volume is delimited by a cone having a vertex coinciding with the measurement system 47, 57, and a directing line directed in a direction of observation of the use of the pair of adaptive glasses 1. In other words, the detection volume is directed towards the front of the pair of adaptive glasses 1.As will be described later, and in particular with reference to the method for controlling the pair of adaptive glasses 1, the distances measured by the measuring systems 47, 57 will be added to the data set, in order to correct the value of the optical power of the lenses 100a, 100b with respect to these distances.

[0118] As indicated previously, the optical power value to be applied to the first lens 100a, and the optical power value to be applied to the second lens 100b can be determined by a computer chosen from the first computer 41 and the second computer 51. For example, the optical power value to be applied to the first lens 100a can be proportional to the inverse of a first distance between the first branch 10 and an external object. This first distance can be measured by the first measuring system 47. Furthermore, the optical power value to be applied to the second lens 100b can be proportional to the inverse of a second distance between the first branch 10 and an external object. This second distance can be measured by the second measuring system 57.

[0119] However, it is particularly advantageous for the comfort of the user of the pair of adaptive glasses 1 to have a correction synchronized on both eyes. Thus, following the determination of the inverse of the first distance and the inverse of the second distance, these data can be exchanged between the first wireless communication member 45 and the second wireless communication member 55. The optical power values ​​to be applied to the first lens 100a and to the second lens 100b are then set to be equal to the synchronization optical power value, which is proportional to the inverse of the smallest distance between the first distance and the second distance. In this case the final optical power value of the second lens 100b is then equal to the final optical power value of the first lens 100a, and to the synchronization optical power value.Then, each electronic control device 45, 55 can be configured to vary the optical power of the first lens 100a and the second lens 100b via at least one fluid displacement member 700 which is configured: to allow the displacement of the primary fluid into the first lens chamber 110 or out of the first lens chamber 110 through the primary fluid passage 111; and / or to allow the displacement of the secondary fluid into the second lens chamber 115 or out of the second lens chamber 115 through the secondary fluid passage 121.

[0120] Advantageously, the at least one fluid displacement member 700 comprises a first fluid displacement member arranged on the first branch 10 which is associated with the first lens 100a, and a second fluid displacement member arranged on the second branch 30 which is associated with the second lens 100b.

[0121] According to one embodiment, the fluid displacement member 700 is an electrostatically actuated device of the type described in the embodiments described in document WO2018 / 041866.

[0122] An exemplary fluid displacement member 700 is shown in Figure 4. This fluid displacement member 700 is described below for the displacement of the primary fluid and the secondary fluid between the fluid displacement member 700 and the first lens 100a, but it is understood that a second similar fluid displacement member 700 can be implemented in the same manner to allow the displacement of said fluids between this second fluid displacement member 700 and the second lens 100b. As shown in Figure 4, the fluid displacement member 700 includes a first buffer chamber 710 configured to include the primary fluid, and a second buffer chamber 720 configured to include the secondary fluid.The primary fluid may be configured to pass through the primary fluid passage 111 opening into the first buffer chamber 710, which fluidly communicates with the primary fluid passage 111 of the first lens 100a. The secondary fluid may be configured to pass through the secondary fluid passage 121 which fluidly communicates with the secondary fluid passage 121 of the first lens 100a. It is therefore well understood that the first buffer chamber 710 communicates with the first lens chamber 110 via the primary fluid passage 111, and that the second buffer chamber 720 communicates with the second lens chamber 115 via the secondary fluid passage 121.

[0123] The first buffer chamber 710 may be at least partially defined by a primary partition wall 200 comprising a plurality of primary fluid passage ports 230 configured to allow passage of the primary fluid. The second buffer chamber 720 may be at least partially defined by a secondary partition wall 300 comprising a plurality of secondary fluid passage ports 330 configured to allow passage of the secondary fluid.

[0124] An electrode chamber 500 may then be located between the first buffer chamber 710 and the second buffer chamber 720, and in particular be defined at least partially by the primary separation wall 200 and the secondary separation wall 300. The electrode chamber may comprise a deformable electrode 600 arranged in the electrode chamber 500 so as to form a first electrode chamber 615 and a second electrode chamber 625 which are isolated from each other, such that no fluid can pass through the deformable electrode 600. On the other hand, the first electrode chamber 615 may communicate fluidically with the first buffer chamber 710 via at least one primary fluid passage orifice 230, and the second electrode chamber 625 may communicate fluidically with the second buffer chamber 720 via at least one secondary fluid passage orifice 330.

[0125] The fluid displacement member 700 may also comprise electrodes that are part of the primary partition wall 200 and the secondary partition wall 300. These electrodes may then be configured to cooperate with the deformable electrode 600 so as to actuate the deformable electrode 600 between different positions to move the primary fluid and the secondary fluid. This fluid displacement at the fluid displacement member causes fluid displacement also at the first lens 100a, in order to vary the position of the membrane 400 of the first lens 100a, and thus allow the variation of the optical power value of the first lens 100a.

[0126] Finally, and according to an embodiment not shown, at least one electronic control device chosen from the first electronic control device 40 and the second electronic control device 50 comprises a user interface configured to receive at least one command from the user of the pair of adaptive glasses 1, said at least one command being configured to be included in the data set. For example, this command may correspond to an instruction from the user to stop the correction provided by the pair of adaptive glasses 1, or to manually set a synchronization optical power value to be applied to the first lens 100a, or to the second lens 100b.

[0127] The arrangements described above make it possible to propose a pair of adaptive glasses 1 with variable optical power for which coordination between the first lens 100a and the second lens 100b is carried out by means of wireless communication devices 45, 55. Thus, it is possible to adjust and coordinate the correction provided by the lenses 100a, 100b, which may for example be variable ophthalmic lenses, without requiring the presence of electrical wires passing through the front face 3. The pair of adaptive glasses 1 can therefore be configured to correct presbyopia, or be a virtual reality or augmented reality mask.

[0128] The invention also relates to a control method for controlling a pair of adaptive glasses 1 of the type described above. An embodiment of such a control method is illustrated in Figure 5.

[0129] The control method firstly comprises a reception step E1 in which a set of data is received by at least one electronic control device chosen from the first electronic control device 40 and the second electronic control device 50. The set of data comprises at least one parameter chosen from: a distance between the pair of adaptive glasses 1 and an external object, a focusing distance, a command from a user of the pair of adaptive glasses 1, an optical power value of the first lens 100a, and an optical power value of the second lens 100b.It is understood that this list is not limiting, and that depending on the embodiment, the data set may include any data or parameter useful for the operation of electro-variable lenses, for example: an indirect measurement of eye convergence, or pupil size, position of the pupils of the wearer of the pair of adaptive glasses, brightness data, perception of the environment, temperature.

[0130] As illustrated in Figure 5, and according to a variant in which the pair of adaptive glasses 1 comprises at least one measuring system 47, 57 configured to detect the presence of an external object, the step E1 of receiving a set of data comprises: a measuring step E10 in which a distance is measured between the measuring system 47, 57 and the external object, and a communication step E13 in which said distance is communicated by the measuring system 47, 57 to at least one electronic control device chosen from the first electronic control device 40 and the second electronic control device 50, the set of data then comprising said distance.

[0131] More particularly, if the pair of adaptive glasses 1 comprises a first measuring system 47 electrically connected to the first electronic control device 40, and a second measuring system 57 electrically connected to the second electronic control device 50, the measuring step E10 comprises a first measuring step E11 in which a first distance is measured between the first measuring system 47 and the external object, and a second measuring step E12 in which a second distance is measured between the second measuring system 57 and the external object.

[0132] In this case, the communication step E13 then comprises the communication of the first distance by the first measuring system 47 to the first electronic control device 40 and the communication of the second distance by the second measuring system 57 to the second electronic control device 50, and the data set then comprises the first distance and the second distance.

[0133] The control method further comprises an exchange step E3, in which the data set is exchanged by a wireless transmission technique between the first wireless communication device 45 and the second wireless communication device 55. According to a non-limiting variant, the control method may comprise a data encryption step E2 implemented before this exchange step E3. During this encryption step E2, the data set is encrypted, according to any encryption method accessible to those skilled in the art. In this case, the exchange step E3 then comprises the exchange of the encrypted data set between the first wireless communication device 45 and the second wireless communication device 55. In this way, it is possible to prevent two pairs of adaptive glasses 1 close to each other from exchanging their data set with each other.Furthermore, it is also possible to avoid consultation of the data set by any other detection system.

[0134] Generally, the exchange step E3 comprises the following steps, implemented simultaneously or not: a first transmission step E31 in which the first wireless communication device 45 transmits at least one first parameter of the data set to the second wireless communication device 55; a second transmission step E33 in which the second wireless communication device 55 transmits at least one second parameter of the data set to the first wireless communication device 45; a first reception step E32 in which the first wireless communication device 45 receives said at least one second parameter of the data set transmitted by the second wireless communication device 45; a second reception step E34 in which the second wireless communication device 55 receives said at least one first parameter of the data set transmitted by the first wireless communication device 55.

[0135] For example, if the control method comprises a first measurement step E11, the first transmission step E31 may comprise the transmission by the first wireless communication device 45 of the first distance to the second wireless communication device 55. The reverse process may be implemented in the other direction if the control method comprises a second measurement step E12.

[0136] Once the data has been exchanged between the electronic control devices 45, 55, the control method may comprise a step of determining an optical synchronization power E4, for example implemented by the first computer 41 and / or the second computer 51.The step of determining a synchronization optical power E4 comprises at least one of the following steps: a first step of calculating E41 a first desired optical power value, equal to the inverse of a first distance between the pair of adaptive glasses 1 and an external object; a second step of calculating E42 a second desired optical power value, equal to the inverse of a second distance between the pair of adaptive glasses 1 and an external object; a step of selecting E43 the synchronization optical power, in which the synchronization optical power is determined to be equal to the largest value between the first desired optical power value and the second desired optical power value.

[0137] Thus, at the end of the step of determining a synchronization optical power E4, a synchronization optical power value is determined.

[0138] The control method then comprises an optical power correction step E5, in which the optical power of the first lens 100a and the optical power of the second lens 100b is corrected according to the data set. As indicated above, before implementing the optical power correction step E5, the first lens 100a may be characterized by a first initial optical power value, and the second lens may be characterized by a second initial optical power value. Following the implementation of the optical power correction step E5, the optical power values ​​of the lenses 100a, 100b are varied to reach a first final optical power value for the first lens 100a, and a second final optical power value for the second lens 100b.It is particularly advantageous for the optical power correction step E5 to be implemented so as to set the first final optical power value and the second final optical power value to the same value, and particularly to the synchronization optical power value determined during the step of determining a synchronization optical power E4. In this way, the optical correction made to the two lenses 100a, 100b is identical at the end of the optical power correction step E5, and the user's viewing comfort is then improved. In general, the optical power correction step E5 is implemented during a correction period strictly less than 1 s, and particularly less than or equal to 2 s. In this way, it is possible to synchronize the optical powers of the two lenses 100a, 100b in a correction period comparable to the time taken to adapt the focus of the eyes.

[0139] To implement the E5 optical power correction step, different solutions can be considered.

[0140] According to a first variant in which the pair of adaptive glasses comprises a correction member, the optical power correction step E5 can be implemented by applying an electric field in order to change the refractive index of one or both lenses among the first lens 100a and the second lens 100b. According to a second variant using a fluid displacement member 700, the optical power of the at least one lens chosen from the first lens 100a and the second lens 100b can be corrected by deforming the deformable portion 470 of the membrane 400 into a corrected position. This corrected position corresponds for example to a deformation of the deformable portion 470 so as to vary a volume of the first lens chamber 110, and a volume of the second lens chamber 115.For example, such a variation may be implemented by actuating the fluid displacement member 700 in a manner as previously described. In other words, the deformation of the deformable portion 470 of the membrane 400 may be achieved by a variation in capacitance between two electrodes offset relative to the membrane 400. These electrodes may be included in the primary separation wall 200 and the secondary separation wall 300. Thus, the optical power correction step E5 may comprise a step of establishing a capacitance value E51 in which a capacitance variation value is determined. For example, said capacitance variation to be provided for the correction may be determined by a look-up table recorded in a memory of the first electronic control device 40 and / or the second electronic control device 50.Said correspondence table being configured to associate an optical power value to be applied to the lens 100a, 100b with a capacitance value to be applied between the two electrodes.

[0141] An example of a correspondence table is given in Table 1 below, the optical power being expressed in hundredths of diopters and the capacitance applied between the electrodes in pico farad.

[0142] [Table 1]

[0143] Table 1: Correspondence between the optical power of the lens and the capacitance applied between two electrodes of the fluid displacement member 700. A negative (respectively positive) sign is applied to the capacitance, by convention, when the voltage is applied to the electrode which allows the low index (respectively high index) liquid to be pushed.

[0144] The optical power correction step E5 can then comprise a step E52 of applying said capacitance variation value between the two electrodes, so as to cause a displacement of the deformable part 470 of the membrane 400.

[0145] Thus and advantageously, the optical power correction step E5 allows both the correction made during this step to be synchronized at all times between the first lens 100a and the second lens 100b, and also allows the exchange of the data set which comprises the data measured by the first measuring system 47 and the second measuring system 57 equipping the first branch 10 and the second branch 30 respectively. This is particularly advantageous for improving the correction of the pair of adaptive glasses 1 because the first measuring system 47 and the second measuring system 57 measure different data on the first branch 10 and on the second branch 30. In a synergistic manner, the measurement of the first distance by the first measuring system 47 and the second distance by the second measuring system 57 makes it possible to obtain measurement redundancy making this measurement more reliable.

[0146] Finally, the control method may comprise a step E6 of updating the correspondence table, in which the correspondence table is updated in order to provide a finer or more suitable correction for the pair of adaptive glasses 1.

[0147] The previously described arrangements make it possible to propose a control method for controlling a pair of adaptive glasses 1 in order to adapt the correction provided by the pair of adaptive glasses 1 in relation to a set of data received by the pair of adaptive glasses 1. Such a method makes it possible in particular to correct presbyopia, or to coordinate the vision provided by virtual reality glasses. In the case of optical correction, the control method is advantageous in that it makes it possible to provide optical correction by focusing which is carried out on the two ophthalmic lenses 100a, 100b, and in a coordinated manner.

Claims

CLAIMS 1. Pair of adaptive glasses (1) comprising: - a front face (3) comprising a first lens (100a) and a second lens (100b); - a first branch (10) extending between a first free end portion (11) and a first connecting end portion (12), said first branch (10) cooperating with the front face (3) at the first connecting end portion (12); - a second branch (30) distinct from the first branch (10) extending between a second free end portion (31) and a second connecting end portion (32), said second branch (30) cooperating with the front face (3) at the level of the second connecting end portion (32), on the side opposite the first branch (10) relative to the front face (3); - a first electronic control device (40) comprising a first computer (41), a first battery (43), and a first wireless communication device (45); - a second electronic control device (50) separate from the first electronic control device (40) comprising a second computer (51), a second battery (53), and a second wireless communication device (55);the first wireless communication member (45) and the second wireless communication member (55) being configured to exchange with each other a set of data comprising at least one parameter chosen from: at least a distance between the pair of adaptive glasses (1) and an external object, a focusing distance, a command from a user of the pair of adaptive glasses (1), an optical power value of the first lens (100a), and an optical power value of the second lens (100b), the first electronic control device (40) and the second electronic control device (50) being further configured to vary respectively the optical power of the first lens (100a) and the optical power of the second lens (100b) as a function of said set of data.; 2. Pair of adaptive glasses (1) according to claim 1, wherein the electronic control device (45, 55) is configured to vary the optical power of at least one lens selected from the first lens (100a) and the second lens (100b) by means of a correction member (701) comprising liquid crystals, said correction member (701) being configured to allow the orientation of said liquid crystals by the application of an electric field in order to change the refractive index of said at least one lens. Pair of adaptive glasses (1) according to claim 1, in which at least one lens selected from the first lens (100a) and the second lens (100b) comprises: - a primary glass (120) comprising a first transparent material, and having a first primary surface (210) and a second primary surface (220), said primary glass (120) being configured to transmit light between the first primary surface (210) and the second primary surface (220); - a secondary glass (160) comprising a second transparent material, and having a first secondary surface (610) and a second secondary surface (620), said secondary glass (160) being configured to transmit light between the first secondary surface (610) and the second secondary surface (620); - a main chamber (140) delimiting a main volume between the second primary surface (220) and the first secondary surface (610); and - a membrane (400) comprising a deformable portion (470), said deformable portion (470) being at least partially included in the main chamber (140), and completely separating the main chamber (140) into at least a first lens chamber (110) configured to comprise at least one primary fluid and a second lens chamber (115) configured to comprise at least one secondary fluid, the first lens chamber (110) being included between the second primary surface (220) and the deformable portion (470), and the second lens chamber (115) being included between the deformable portion (470) and the first secondary surface (610). Pair of adaptive glasses (1) according to claim 3, wherein said at least one lens selected from the first lens (100a) and the second lens (100b) comprises a primary fluid passage (111) comprising a primary channel configured to transport the primary fluid and to open in the first lens chamber (110); and a secondary fluid passage (121) comprising a secondary channel configured to carry the secondary fluid and to open into the second lens chamber (115).

5. Pair of adaptive glasses (1) according to claim 4, wherein the electronic control device (45, 55) is configured to vary the optical power of said at least one lens chosen from the first lens (100a) and the second lens (100b) by means of a fluid displacement member (700) configured: - to allow movement of the primary fluid into the first lens chamber (110) or out of the first lens chamber (110) through the primary fluid passage (111); and / or - to allow movement of the secondary fluid into the second lens chamber (115) or out of the second lens chamber (115) through the secondary fluid passage (121).

6. Pair of adaptive glasses (1) according to any one of claims 1 to 5, comprising at least one measuring system (47, 57) configured to detect the presence of an external object, and to communicate to at least one electronic control device chosen from the first electronic control device (40) and the second electronic control device (50), a value of a distance separating said at least one measuring system (47, 57) and said external object.

7. Pair of adaptive glasses (1) according to claim 6, wherein the at least one measuring system (47, 57) is arranged on at least one connecting end portion chosen from the first connecting end portion (12) and the second connecting end portion (32).

8. Pair of adaptive glasses (1) according to any one of claims 1 to 7, wherein at least a portion of the first branch (10) is configured to pivot relative to the front face (3) by means of a first hinge (14), wherein at least a portion of the second branch (30) is configured to pivot relative to the front face (3) by means of a second hinge (34), and wherein the first wireless communication member (45), and the second wireless communication member (55) are electrically connected respectively to a first antenna (16) and to a second antenna (36), said first and second antennas (16, 36) being configured to allowing the exchange of the data set between the first wireless communication member (45) and the second wireless communication member (55); the first antenna (16) being included in the first hinge (14), and the second antenna (36) being included in the second hinge (34).

9. Pair of adaptive glasses (1) according to claim 8, in which the first hinge (14) constitutes the first antenna (16), and / or in which the second hinge (34) constitutes the second antenna (36).

10. Pair of adaptive glasses (1) according to any one of claims 8 or 9, wherein the first antenna (16) is arranged at the first connecting end portion (12), and the second antenna (36) is arranged at the second connecting end portion (32).

11. Pair of adaptive glasses (1) according to any one of claims 1 to 10, wherein at least one electronic control device selected from the first electronic control device (40) and the second electronic control device (50) comprises a user interface configured to receive at least one command from the user of the pair of adaptive glasses (1), said at least one command being configured to be included in the data set.

12. A control method for controlling a pair of adaptive glasses (1) according to any one of claims 1 to 11, the control method comprising: - a receiving step (El) in which a set of data is received by at least one electronic control device chosen from the first electronic control device (40) and the second electronic control device (50), said set of data comprising at least one parameter chosen from: a distance between the pair of adaptive glasses (1) and an external object, a focusing distance, a command from a user of the pair of adaptive glasses (1), an optical power value of the first lens (100a), and an optical power value of the second lens (100b); - an exchange step (E3), in which the data set is exchanged by a wireless transmission technique between the first wireless communication device (45) and the second wireless communication device (55); - an optical power correction step (E5), in which the optical power of the first lens (100a) and the optical power of the second lens (100b) are corrected according to the data set.

13. Control method according to claim 12, of a pair of adaptive glasses (1) according to claim 2, wherein during the optical power correction step (E5), the optical power of at least one lens chosen from the first lens (100a) and the second lens (100b) is corrected by the application of an electric field in order to change the refractive index of said at least one lens.

14. Control method according to claim 12, of a pair of adaptive glasses (1) according to any one of claims 3 to 5, wherein during the optical power correction step (E5), the optical power of the at least one lens chosen from the first lens (100a) and the second lens (100b) is corrected by deforming the deformable part (470) of the membrane (400) into a corrected position, said corrected position corresponding to a deformation of the deformable part (470) so as to vary a volume of the first lens chamber (110), and a volume of the second lens chamber (115).

15. Control method according to any one of claims 12 to 14, wherein the pair of adaptive glasses (1) comprises at least one measuring system (47, 57) configured to detect the presence of an external object, and wherein the step of receiving (El) a set of data comprises: - a measuring step (E10) in which a distance is measured between the measuring system (47, 57) and the external object, and - a communication step (E13) in which said distance is communicated by the measuring system (47, 57) to at least one electronic control device chosen from the first electronic control device (40) and the second electronic control device (50), the data set then comprising said distance.

16. Control method according to any one of claims 12 to 15, further comprising a data encryption step (E2) implemented before the exchange step (E3), in which the set of data is encrypted, the exchange step (E3) then comprising the exchange of the set of encrypted data between the first wireless communication means (45) and the second wireless communication means (55).

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