FR3088526A1 - METHOD FOR MODIFYING THE APPEARANCE OF A REGION OF THE FACE OF A USER COATED WITH A COSMETIC COMPOSITION - Google Patents

Abstract

Method for modifying the appearance of at least one region of a user's face coated with a cosmetic composition comprising at least one luminescent compound, in which said region is subjected to light pulses originating from a worn illumination device through the head of the user.

Description

METHOD FOR MODIFYING THE APPEARANCE OF A FACE REGION

OF A USER COATED WITH A COSMETIC COMPOSITION

Technical area

The present invention relates to a method for modifying the appearance of at least one region of the face of a user coated with a cosmetic composition, in particular the eyelashes or the skin of the face, in particular the eyelids, the lips or the cheeks, and an illumination device for implementing such a method.

Prior art

The purpose of makeup is to hide imperfections and / or improve the visibility of certain parts of the body. Thus, it is common to use products to hide imperfections, such as unsightly spots or reliefs, or to highlight certain areas, such as eyelashes, eyelids or lips. These areas are naturally considered attractive and users often want to further increase their appeal. In particular, certain morphologies are such that areas are less marked than the average, for example the cheekbones, and the user may therefore want to highlight them. It is also common to want to improve your appearance even further in certain situations, such as a date or a party.

In a known manner, users use compositions to color areas of keratin materials whose original color is different from that of the composition, for example blue, purple, or gray on the eyelids, which gives a visibility effect. and of notable appeal. The application of a composition having a natural color, such as pink or red, makes it possible to express emotion or youth, in particular to increase the attractiveness of the lips or the cheeks. It is also common to apply a colored material or not on the eyelashes, in order to increase the volume, which is particularly effective in the case of fine or rare eyelashes.

In any case, the user tries to dose the makeup so that the effect is visible but not excessively. Indeed, excessive application of makeup can produce an effect contrary to the desired effect. This dosage depends on each person, their tastes and their situation. Thus, several solutions exist at the present time, in particular ranges of products with different levels of effects, very varied colors, from the least to the most chromatic, textures from little to strongly covering. Advice to users is also available in stores or via the Internet.

However, despite these solutions, it would be beneficial to further increase the attractiveness of makeup areas. Indeed, users rarely change their makeup and make-up, rarely trying other colors or other covering powers, or quantity of products. This may be due to the apprehension of appearing to others with too much makeup, but also in a way too different from usual. Some users may also have the unpleasant feeling of not assuming themselves when they wear more makeup than usual. However, users, in certain situations, for example to go to an appointment, may wish to appear more attractive without, however, this desire being too conspicuous.

It is known from international application WO 2016/079038 to use a device for lighting the hair of a user, comprising a fixing element for fixing light-emitting diodes on the hair, coupled to an optical fiber configured to transmit the light emitted by the diodes to a luminescent material applied to the hair.

Application EP 3 023 024 relates to a device for emitting light on the nails of a user, similar to that disclosed in the international application described above.

Application KR 20120002069 describes the use of glasses fitted with light-emitting diode (LED) lamps to illuminate the skin so as to prevent and correct wrinkles for the user.

Objective of the invention

There is a need to benefit from new facial makeup effects.

Summary of the invention

The invention aims in particular to meet this objective and relates to, according to one of its aspects, a method for modifying the appearance of at least one region of the face of a user coated with a cosmetic composition comprising minus a luminescent compound, in which said region is subjected to light pulses coming from an illumination device carried by the head of the user.

According to another of its aspects, the invention relates to an illumination device intended to be worn by the head of a user to modify the appearance of at least one region of his face coated with a cosmetic composition comprising at least one luminescent compound, the device being configured to emit light pulses in the direction of said region, and comprising a module for automatic analysis of the user's environment and / or a receiver for a radio frequency control signal or optical, the emission of light pulses depending on the result of the analysis or the received signal.

The rendering of the makeup, due to the presence of at least one luminescent compound in the composition, changes in intensity according to the light pulses, offering an expressive makeup.

The invention makes it possible to create makeup that gains visibility, and to increase the visual appeal of the user, if necessary in a subliminal and not very conspicuous manner.

Thanks to the invention, a new category of makeup effects is possible, where the attraction obtained is greater than those of known makeup methods, without requiring an excess of color, and even without producing a permanent makeup effect in the case of tone-on-tone compositions. The invention is therefore specially adapted for users who do not wish to change their habits in the eyes of others.

The device according to the invention is notably configured to illuminate the user's eyelashes, eyelids, lips, or cheeks, in particular the cheekbones.

People around them feel a particular attraction without necessarily detecting that the makeup has increased in intensity during the show. Surprisingly, the increase in the intensity of makeup is not detected when the light pulse is of the order of a second because, most of the time, the surrounding people do not look at the user attentively. , especially in the areas of the face particularly affected by the invention.

Thanks to the invention, the surrounding persons are thus capable of detecting a pleasant effect, without however realizing the exact nature of the phenomenon and without associating it with the makeup of the user. Since the emission of light is non-continuous, the origin of the effect felt cannot be understood.

Emission of light pulses

The illumination device is capable of emitting light in the form of light pulses.

Preferably, the illumination device emits the light pulses non-continuously. The energy consumption of the device according to the invention is thus reduced. The emission of the pulses is advantageously stealthy, being for example limited to less than 10% of the period during which the device is worn by the user.

Preferably, the user's environment is analyzed automatically, in particular by means of a circuit integrated into the device, in particular using a camera or a motion detector, and / or a radio or optical control signal, in particular using a radio receiver or an optical sensor, the emission of light pulses depending on the result of the analysis or on the signal received.

The camera or the motion detector can thus detect a blink of an eye, or a movement or the proximity of a person, or recognize a face, and react for example by modifying the frequency of emission of the light pulses or by emitting a light pulse; this can make it possible, for example, to avoid emitting light pulses in the absence of people in the vicinity of the wearer of the device, and thus to increase the autonomy of the device.

The device may also include a sensor giving a state of ambient light, indicating the clarity or darkness, and making it possible to automatically adjust the intensity of the emitted light.

The aforementioned command signal can be sent via a mobile phone or a remote control placed, for example, in the user's pocket.

Being able to control or remote control the operation of the device makes it easier to reserve the attraction effect for a particular situation, for example to attract one person rather than another, or only at a certain time of the day, for example in the evening. This avoids the drawbacks of too marked makeup, which can attract too much attention, for example in a work environment, where it is not necessarily well seen.

It is possible to act automatically on the light pulses as a function of information coming from an illumination device worn by another user, in particular situated at a distance of between 1 m and 20 m, preferably from 2 m to 10 m. In this case, the control signal is a function of said information coming from another illumination device. Two or more people can recognize each other via the device and communicate through light pulses. Coded language can be used, notably using the frequency of the pulses, their length or a coding such as Morse code.

A light pulse appearing as a short-term continuous illumination to the human eye, can thus include digital information coded at high frequency, not perceptible to the eye because of its high frequency, but capable of being read by a circuit. adapted electronics, in particular with a frequency greater than 5 Hz, preferably greater than 50 Hz. For example, the pulse is perceived as a continuous flash of 0.2 seconds duration, but during this duration of 0.2 seconds a signal has been encoded in digital form at a frequency of a few kHz for example. The coding can be chosen so as to prevent the light from going out for the duration of the pulse. This coded information can convey a predefined message. The device can be arranged to enable the information encoded within a light pulse to be configured, for example by using a mobile telephone, and if necessary to program a response scenario upon receipt of information encoded by another device.

According to yet another of its aspects, the invention relates to a method of communication between several lighting devices carried by the heads of different users, each lighting device being configured to emit light pulses towards a region of the user's face coated with a cosmetic composition comprising at least one luminescent compound, process in which, depending on information coming from an illumination device worn by one of the users, the illumination device at least one other user emits at least one light pulse, in order to initiate communication between the devices.

The invention can thus serve as discreet communication between different users, and make makeup interactive, as a new language of communication.

The pulses in question can convey coded information at high frequency, as mentioned above.

Following the triggering of the emission of light pulses, the illumination device can emit it for a predetermined duration, in particular between a few seconds and a few minutes.

Light sources, power and pulses

The frequency of the light pulses is advantageously between 0.01 Hz and 200 Hz, preferably between 1 Hz and 100 Hz

The illumination device advantageously comprises at least one light source whose average wavelength is between 280 nm and 500 nm, corresponding to the ultraviolet and to very little visible, being in particular between 350 nm and 450 nm. The light pulses are thus not detectable in the absence of luminescence, which makes the method according to the invention very discreet.

The light source (s) of the illumination device can be miniature LED sources or a laser diode.

The light source (s) may be placed at a distance from the region intended to be subjected to illumination. In this case, the light can be routed near the region via an optical fiber.

LED sources are preferred if they are placed directly near the face. The laser diode is preferred in the case where it is placed at a distance from the region intended to be subjected to illumination.

The duration D of each light pulse can be between 1 ms and 100 seconds, better between 10 ms and 10 s, even better between 50 ms and 2 s.

The light pulses can have a variable duration. Two consecutive light pulses of rows n and n + 1 can thus have different durations D _n + i and D _{n respectively} .

The frequency of emission of light pulses can be constant. In a variant, the frequency of emission of the light pulses is variable.

The time interval I between the emission of two light pulses can be between 0.1 seconds and 3 minutes, better still between 2 seconds and 120 seconds.

In the case where the illumination device comprises several light sources, in particular emitting at different wavelengths, these sources can be triggered non-simultaneously for the emission of light pulses. This achieves eye-catching effects.

For example, in the case where the illumination device comprises three light sources, the first light source can be triggered to emit the pulses, then, after a predetermined period of time, the second, then, again after a lapse of predetermined time, the third, so that the three sources emit at the same time.

When multiple sources are used, the sources can each emit over different wavelength ranges, to create effects where different parts of the face are not subjected to light pulses at the same time.

In the case where the device is configured to illuminate two different regions, for example left eye and right eye, the device can be configured to match or alternate the pulses from one region to another to increase the attraction.

The characteristics of the light pulses can be adapted according to the desired effect, and / or according to the proximity of the surrounding persons, and / or according to the light environment of the place where the user is located. It is particularly advantageous to follow a random transmission rate.

The light power of a pulse can be between 0.001 Watt and 500 Watts, being in particular between 0.1 Watt and 100 W. The average light power emitted by the device during illumination can be less than 10 W, being preferably less than 5 W for high pulse powers and less than 2 W for lower powers.

In the case of a single pulse train, the average light power corresponds to the light power of the pulse.

It is advantageous to limit the duration and the number of pulses so that an energy factor E depending on the number of pulses n, the light power Pimpuision of a pulse and its duration D is less than 200 J, preferably less than 100 J, with E = nx Pimpuision x D, with Pimpuision expressed in Watts and D in seconds.

Thus, when the pulses are emitted at low power, for example below 1 W, rather long pulse durations, for example up to 3 seconds, and a large number of pulses n, for example up to 333 , are preferably chosen, so that the attraction effect is effective.

When the pulses are transmitted at high power, for example above 10 W, in particular 30 W, the number of pulses n may be limited, preferably less than 33, and / or the duration of the pulses D may be short, preferably less than 0.3 s.

In the intermediate power zone, when the pulses are transmitted at medium power, in particular between 1 W and 10 W, a large number of pulses n can be transmitted, preferably less than 60, and the duration of the pulses D can be average, preferably less than 1 s.

The extent of the region illuminated by a light pulse can be between 10 mm ² and 2500 mm ² .

The distance between the light source of the illumination device, when carried by the user's head, and the illuminated region can be between 5 mm and 100 mm, preferably from 10 mm to 50 mm.

The light source (s) may be arranged so as to emit essentially only towards the person wearing the device. The source or sources can thus have a small angle of divergence of the emitted beam and / or comprise a cover which blocks the rays directed towards the outside.

Where appropriate, the source or sources are mounted in an orientable manner on the device.

The illumination device may include an optic, for example capable of collimating the light rays in the case of LED sources, or capable of diverging the light rays in the case of a laser diode.

The source or sources can be controlled remotely, for example using a mobile phone, so as to allow the user to adjust the intensity for example.

Device

In a preferred embodiment of the invention, the illumination device is worn by glasses. Such a device is particularly suitable for illuminating the eyes, the cheeks or the lips. In this case, the light source or sources of the illumination device are advantageously positioned so that the eye does not perceive the light pulses, for example on one of the arms of the glasses, on the side opposite their free end, or on deck or circles. The source or sources can be supplied with electricity from a battery contained in one of the branches for example. The source or sources can be carried by a box arranged to be removably attached to an existing mount, if necessary.

In variants, the device according to the invention is a nose jewel or brow bone, for example a piercing or a pastille glued, a head covering, for example a cap, a hat, or a visor, or a scarf intended to be placed on the head of the user. The nose jewel is particularly suitable for illuminating the lips, while the brow bone jewel can illuminate the eyes or cheeks, and the headgear can be adapted to illuminate the eyes, cheeks or lips.

Preferably, the light source or sources are positioned in a chosen location so that they are not visible.

The device may include a control circuit for triggering the emission of light pulses. The light source or sources, in this case, are advantageously connected to said control circuit.

Alternatively, the device according to the invention is connected by wireless communication to a control circuit for triggering the emission of light pulses.

The control circuit can be a dedicated circuit or a programmable logic circuit, for example comprising an internal memory, such as an electrically erasable and programmable read-only memory (EEPROM). It can be part of an electronic machine, in particular a personal computer or a smartphone.

The module for automatic analysis of the user's environment can include or be connected to a camera or a motion detector performing the analysis. The device analysis module can be integrated into the control circuit. In a variant, the analysis module is separate from the control circuit, and is in communication with the latter.

The duration D of emission of the light pulses and their frequency are preferably recorded in the control circuit or accessible by the latter.

Such a control circuit is advantageously able to control the triggering of the emission of the light pulses from emission parameters.

The parameters for the emission of light pulses can be predetermined, in particular by the user, and saved or accessible by the control circuit, thus knowing when and what type of pulse must be emitted.

In a variant or in combination, the parameters for emitting the light pulses can be adjusted by the user when the device is used, for example using a remote control or a smartphone in communication with the circuit. control. The user can thus personalize the device and the conditions of emission of the light pulses according to the desired effects and the conditions of use of the device.

One of the parameters for the emission of light pulses can indicate the triggering of the emission depending on the analysis result or upon reception of the signal, as described above. One of the light pulse emission parameters can indicate that the emission is triggered when information is received from an illumination device worn by another user.

The control circuit can also be capable of decoding the light pulses emitted by the illumination device, in particular in the case of communication with one or more other devices.

An application, in particular running on a smartphone, can be used to control the broadcast and serve as a user interface.

The control circuit can be part of a watch connected to a smartphone or to a remote device connected by wire or wirelessly, for example by radio frequency, WIFI or Bluetooth®.

The illumination device can also comprise at least one transistor, for example of the field effect type with metal-oxide-semiconductor structure (Mosfet), and a power source, in particular a Lithium ion battery, allowing d '' supply the light source (s).

Together

According to yet another of its aspects, the invention relates to a set comprising:

a cosmetic composition to be applied to at least one region of the face of a user, in particular the eyelashes, the eyelids, the lips or the cheeks, this composition comprising at least one luminescent compound, and

- an illumination device intended to be worn by the head of the user and configured to emit light pulses in the direction of said region.

The assembly can be in the form of a box containing the device and the composition.

The assembly may also include one or more means for applying the composition, for example a brush, a puff or a foam.

Preferably, the illumination device is worn by glasses.

The characteristics set out above for the method and the device apply to the assembly and vice versa.

Luminescent cosmetic composition

Preferably, said at least one luminescent compound contained in the composition is a fluorescent compound.

The term "fluorescent compound" should be understood to mean a substance which, under the effect of ultraviolet rays and / or visible light, re-emits in the visible part of light which it has absorbed. The naturally reflected color is thus reinforced by the re-emitted color and appears extremely brilliant. Such fluorescent compounds are for example described in the article "Luminescent materials (fluorescent daylightfl \ Encyclopedia of Chemical Technology, Kirk-Othmer, vol 14, p. 546-569, 3rd edition, 1981, Wiley.

Preferably, the fluorescent compounds according to the invention are cosmetically acceptable compounds capable of absorbing light between 280 nm and 500 nm and of reemitting in the visible at a wavelength between 400 nm and 800 nm.

Said at least one luminescent compound may be contained in the composition in pigmentary or soluble form.

Said at least one fluorescent compound contained in the composition may be a pigment. By “pigment”, it is necessary to understand a particle, mineral or organic, insoluble in the medium of the composition.

In a variant, said at least one fluorescent compound contained in the composition is a dye. By “dye”, it is necessary to understand a chemical compound dissolved in the medium of the composition.

The dye (s) can be water-soluble or liposoluble.

The fluorescent compounds can belong to the fluorone group, such as erythosines, rhodamines, or fluoresceins. In a variant, the fluorescent compounds belong to the aminophenyl ethylene pyridinium group or its equivalents aminophenyl ethylene imidazolium or aminophenylethylene benzyimidazole.

In another variant, the fluorescent compounds belong to the triarylmethane group, such as T auramine O, or to the benzyimidazolium group.

The fluorescent compounds can be derived from 2 - {(E) -2- [4 (dimethylamino) phenyl] vinyl} -l-ethylpyridinium chloride, 3H-Indolium, 2- (2- (4 - ((2 cyanoethyl) methylamino) phenyl) ethenyl) -l, 3,3-trimethyl- (CID 6435843), or 2- (7 (Diethylamino) -2-oxo-2H-1 -benzopyran-3-yl) -1,3-dimethyl -IH-benzimidazolium chloride (CID 169053).

The pigments can be derived from fluorescent dyes previously dissolved in a support resin in order to obtain a solid solution, which is then ground into a powder of resin particles having fluorescent properties, as described in patents EP 0 370 470, US 2,851,424, US 3,711,604, US 3,856,550 or US 2,938,878.

An inorganic fluorescent compound can be used, as for example described in the application JP 05-117127.

The fluorescent compound can also be a quantum dot, or “quantum dots” in English. Quantum dots are luminescent semiconductor nanoparticles capable of emitting, under light excitation, radiation having a wavelength between 400 nm and 700 nm. These nanoparticles can be manufactured according to the methods described in US Patents 6,225,198 or US 5,990,479, or in the following articles: Dabboussi BO et al (CdSe) ZnS core-shell quantum dots: synthesis and characterization of a size series of highly luminescent nanocristallites, 58 Journal of phisical chemistry B, vol 101, 1997, pp 9463-9475, and Peng, Xiaogang et al, Epitaxial Growth of highly Luminescent CdSe / CdS core / shell nanocrystals with photostability and electronic accessibility Journal of the American Chemical Society, vol 119, N ° 30, pp 7019-7029.

Compounds known as optical brighteners can be used, such as for example those described in the article Fluorescent Whitening Agent, Encyclopedia of Chemical Technology, Kirk-Othmer, vol 11, p. 227-241, 4th edition, 1994, Wiley. These compounds can be defined as compounds absorbing essentially in the ultraviolet A, between 300 nm and 390 nm, and reemitting between 400 nm and 525 nm. Among the optical brighteners, mention may more particularly be made of stilbene derivatives, in particular polystyrylstilbene and triazinstilbene, coumarin derivatives, in particular hydroxycoumarins and aminocoumarins, oxazole, benzoxazole, imidazole, triazole, pyrazoline derivatives, derivatives of pyrene and porphyrin derivatives and / or mixtures thereof.

Such compounds can be:

- the stilbenic derivative of naphtho-triazole sold under the trade name "Tinopal GS",

- di-styryl-4,4 ’biphenyl sulfonate di-sodium (CTFA name: disodium distyrylbiphenyl disulfonate) sold under the trade name" Tinopal CBS-X ",

- the cationic derivative of aminocoumarin sold under the trade name "Tinopal SWN CONC. ",

- 4,4'-bis - [(4,6-dianilino-1,3,5-triazin-2-yl) amino] sodium stilbene-2,2'-disulfonate sold under the trade name "Tinopal SOP" , 4,4'-bis - [(4-anilino-6-bis (2-hydroxyethyl) amino- 1,3,5-triazin-2yl) amino] stilbene-2,2'-disulfonic acid sold under the name "Tinopal UNPA-GX" commercial product,

- 4,4'-bis- [anilino-6-morpholine-1,3,5-triazin-2-yl) amino] stilbene sold under the trade name "Tinopal AMSGX", 4,4'-bis- [ (4-anilino-6- (2-hydroxyethyl) methyl amino-1,3,5-triazin-2yl) amino] stilbene-2,2'-disodium sulfonate sold under the trade name "Tinopal 5BM-GX" ("Tinopal And derivatives are all sold by the company CIBA Spécialités Chimiques),

- 2,5 thiophene di-yl bis (5 ter-butyl-1,3 benzoxazole) sold under the trade name “Uvitex OB” by the company CIBA,

- the anionic derivative of di-aminostilbene in dispersion in water sold under the trade name "Leucophor B SB liquid" by the company CLARIANT, or

- optical brightener lacquers sold under the trade name "COVAZUR" by the company WACKHER.

The composition can be a colored composition or not. Thus, the composition in its "inactive" form, that is to say not illuminated, can be a red, an orange, a blue, or a green. In this case, it is therefore visible and becomes even more so when activated by the illumination of the light pulse. The composition in its “inactive” form can also be of the natural color of the area, in particular the color of the lips or of the skin of the cheeks. It is therefore almost not detectable, and becomes so when illuminated by the light pulse.

The composition may be in liquid or solid form, for example in the form of a powder, free or compact, or in the form of a bread of composition.

The composition can be a mascara, a lipstick, an eyeshadow, or a blush.

The composition can be applied directly to the finger, by means of a grape of composition, a soaked pad, or else a flocked applicator, a brush, a brush or any other means of application, impregnated with composition, such as a puff or foam.

Glasses and jewelry

According to another of its aspects, the invention relates to glasses intended to be worn by the head of a user to modify the appearance of at least one region of his face coated with a cosmetic composition comprising at least one luminescent compound, and carrying an illumination device configured to emit light pulses towards said region and comprising a module for automatic analysis of the environment of the user and / or a receiver of a radio frequency control signal or optical, the emission of light pulses depending on the result of the analysis or the received signal.

According to yet another of its aspects, the invention relates to a piece of jewelry intended to be worn by the head of a user to modify the appearance of at least one region of his face coated with a cosmetic composition comprising at least a luminescent compound, and carrying an illumination device configured to emit light pulses in the direction of said region and comprising a module for automatic analysis of the user's environment and / or a receiver for a radio frequency control signal or optical, the emission of light pulses depending on the result of the analysis or on the signal received.

The characteristics set out above for the process, the device and the set apply to glasses and jewelry.

Description of the figures

The invention will be better understood on reading the detailed description which follows, of nonlimiting examples of implementation thereof, and on examining the appended drawing, in which:

FIG. 1 is an illustration of different stages of an example of a method according to the invention,

FIG. 2 represents glasses carrying an illumination device according to the invention, and

- Figure 3 illustrates an example of implementation of the method according to the invention.

detailed description

Different steps of an exemplary method according to the invention for modifying the appearance of at least one region of the face of a user coated with a cosmetic composition comprising at least one luminescent compound, are shown in FIG. 1, and will be described in detail in the following.

The cosmetic composition comprises at least one compound such as a pigment or dye, and / or mattifying filler, which modifies the appearance of the made-up region independently of the presence of a light pulse emitted in accordance with the invention. This method implements an illumination device according to the invention, worn by the user's head and configured to illuminate in particular his eyelashes, eyelids, lips, or cheeks.

During a step 11a, the environment of the user is automatically analyzed, in particular using a camera or a motion detector. In an alternative step 11b, the device receives a radio frequency or optical control signal, in particular using a radio receiver or an optical sensor. In another alternative step 11c, the device receives information from an illumination device worn by another user.

In a step 12, the emission of the light pulses is triggered as a function of the result of the analysis, or of the signal received, which can be a function of the information coming from the other illumination device, said region of the face of the eye. user being thus subjected to light pulses from the illumination device.

The spectacles 2 shown in FIG. 2 carry, on the right arm, on the side opposite its free end, an illumination device 3 according to the invention, configured to emit light pulses in the direction of the face region of a user coated with a cosmetic composition comprising at least one luminescent compound. As described above, the device 3 includes an automatic analysis module of the user's environment and / or a receiver of a radio or optical control signal, the emission of the light pulses depending on the result of the analysis. or received signal.

In the example considered, the illumination device 3 comprises a light source, of LED type, on each branch, each emitting at a wavelength of 405 nm of 30 W, advantageously triggered non-simultaneously for the emission of light pulses.

The frequency of emission of the light pulses can be constant or variable, being for example between 1 ms and 5 seconds, and the light pulses can be spaced from 1 to 10 seconds.

In a variant, the illumination device 3 comprises six light sources on each branch, of LED type, each emitting at a wavelength of 360 nm of 40 mW, advantageously triggered non-simultaneously for the emission of the pulses bright.

The frequency of emission of the light pulses can be constant or variable, being for example between 1 ms and 10 seconds, and the light pulses can be spaced from 1 to 10 seconds.

Preferably and in these two examples, the average light power for each source varies from 0.03 W to 3 W.

One can for example emit n = 100 pulses of duration D = 2 seconds and of power Pimpuision = 1W (low power), for example spaced by I = 7 seconds, which gives an energy factor E equal to 200 J, corresponding to the energy sent. This high value, corresponding to 35 minutes of solar illumination at midday in a geographic region with rather high sunshine, is considered acceptable if this illumination operation of 15 min in total occurs only once in the day and dispersed over an area of skin of several cm ² , typically 10 cm ² . Rather, it is possible to emit n = 100 pulses of D = 0.9 seconds and of Pimpuision power = 1W, for example spaced apart from I = 11.1 seconds, producing an energy E of 90 J for an operation which lasts approximately 20 minutes. This can be done one or more times during the day.

In the case of a higher power, for example Pimpuision = 30 W, one can emit n = 20 pulses of D = 0.3 seconds, for example spaced by I = 5.7 seconds, which gives an E factor of 180 J. In a variant, it is possible to emit n = 20 pulses of D = 0.1 seconds, for the same power, for example spaced 1 = 1.9 seconds, producing an energy E of 60 J for an operation which lasts 40 s, performed one or more times during the day.

In the case of an average power for example Pimpuision = 3 W, we can emit n = 60 pulses of D = 1 second, for example spaced by I = 9 seconds, which gives an E factor of 180. In a variant, we can emit n = 30 pulses of D = 0.5 seconds, for the same power, for example spaced I = 9.5 seconds, producing an energy E of 45 J for an operation of approximately 5 minutes, performed one or several times a day.

In the case of high powers, the average power can be 3 W, with pulses of 30 W for 0.3 seconds every 3 seconds, corresponding to 9 J for 3 seconds.

In the case of average powers, the average power can be 1 W, with pulses of 3W for 1 second every 3 seconds, corresponding to 3 J for 3 seconds.

In the case of low powers, the average power can be 0.3 W, with pulses of 1 W for 0.3 seconds every second, corresponding to 1 J for 3 seconds.

These parameters for the emission of light pulses depend on the situation in which the user finds himself. For example, in the case where the surrounding persons are not in close contact, it is possible to use rather long pulses, for example between 0.1 seconds and 1 second, and / or spaced apart, for example one pulse per second. Conversely, when the user is in a situation where the surrounding people are in close contact, for example during an appointment, a one-on-one dinner, short pulses are advantageously used, for example between 0.01 and 0.1 seconds, and rather spaced, one pulse every 10 to 100 seconds. The intensity of the emission, depending on the wavelength of the light sources, can also be adapted according to the situation. For example, in the case of a weak light atmosphere, especially in the evening, a low intensity is advantageously used, it being understood that the darkness makes the makeup thus illuminated more visible.

The device 3 comprises in the example described a control circuit for triggering the emission of light pulses. In a variant not shown, the device is connected by wireless communication to a control circuit for triggering the emission of light pulses.

The composition may be as described above, for example being a mascara, a lipstick, an eyeshadow, or a blush.

Different examples of implementations of the method according to the invention will now be described.

Example 1

In this example, illustrated in FIG. 3, an eyeshadow cosmetic composition comprising a fluorescent compound, 2 - {(E) -2- [4 (dimethylamino) phenyl] vinyl} -l-ethylpyridinium iodide, a been deposited on a user's eyelids.

An illumination device 3 according to the invention is worn by the user's glasses. In this example, when the analysis module of the device detects that the user is moving his head or hands, the control circuit of the device triggers the emission of a light pulse, represented by the peak of the curve in the figure. 3. You can see, for example from 2 m away, that the makeup is more visible and attracts the eye. In two different moods, in daylight and indoors, we observe a remarkable superior effect without however giving the impression of being too much made up.

In this example, the illumination device 3 according to the invention comprises six light sources per branch, 40 mW LEDs emitting at a wavelength of 360 nm, for example of model UV5TZ-405-30 from the Manufacturer Bivar , spaced apart on the branches by a few millimeters. One can achieve effects attractive to the eye of a third person by triggering the emission of each source at intervals, for example a pulse of 1 second every 5 seconds on a single source, then on three at the same time, then out of six at the same time. Thus, in this example, the total light power varies from 0 to 420 mW, and the average power reaches 60 mW.

Example 2

In another example, using the same device as in the first example, the triggering of the light pulses takes place automatically as a function of information coming from an illumination device carried by another user, located at a close distance . This other user can be part of a friend's list of friends, saved in a database to which the device of the first user has access.

Example 3

The same test is carried out as in Example 1, except that a 3W LED source is placed per branch (reference 3W UV Ultraviolet 400-405nm High Power

SMD LED from Epi star with 4 V supply), and pulses of 100 ms are emitted every 9.9 seconds, producing six pulses for 1 minute. The average power is 0.03 W. To increase the attraction effect, a single train of 10 pulses is restarted by increasing their duration to 300 ms every 4.7 s, producing six pulses for 30 seconds. The average power of 0.18 W.

Of course, the invention is not limited to the exemplary embodiments which have just been described.

The invention is not limited to the devices or light sources described, 15 and other types of devices or light sources could be used.

Other types of luminescent compounds can also be used.

Other emission conditions for light pulses can be envisaged.

Claims (23)

1. Method for modifying the appearance of at least one region of the face of a user coated with a cosmetic composition comprising at least one luminescent compound, in which said region is subjected to light pulses originating from a device for illumination carried by the user's head. 2. Method according to claim 1, in which the frequency of the light pulses is between 0.01 Hz and 200 Hz, better still between 1 Hz and 100 Hz. 3. Method according to claim 1 or 2, in which the user's environment is analyzed automatically, in particular by a circuit integrated into the device, in particular using a camera or a motion detector. , and / or a radio or optical control signal is received, in particular using a radio receiver or an optical sensor, and in which the emission of the light pulses depends on the result of the analysis or of the received signal. 4. Method according to any one of claims 1 to 3, wherein one acts automatically on the light pulses as a function of information coming from an illumination device carried by another user. 5. Method according to any one of the preceding claims, in which the illumination device comprises at least one light source, in particular an LED source or a laser diode, emitting at an average wavelength between 280 nm and 500 nm, especially between 350 nm and 450 nm. 6. Method according to any one of the preceding claims, in which the duration (D) of each light pulse is between 1 ms and 100 s, better still between 50 ms and 2 s. 7. Method according to any one of the preceding claims, in which the light pulses have a variable duration. 8. Method according to any one of the preceding claims, in which the frequency of emission of the light pulses is constant. 9. Method according to any one of claims 1 to 7, wherein the frequency of emission of the light pulses is variable. 10. Method according to any one of the preceding claims, in which the illumination device comprises several light sources, in particular emitting at different wavelengths, these sources being triggered non-simultaneously for the emission of light pulses. . 11. Method according to any one of the preceding claims, in which the illumination device is worn by glasses. 12. Set including: a cosmetic composition to be applied to at least one region of the face of a user, in particular the eyelashes, the eyelids, the lips or the cheeks, this composition comprising at least one luminescent compound, and - an illumination device intended to be worn by the head of the user and configured to emit light pulses in the direction of said region. 13. The assembly of claim 12, wherein the composition is a mascara, a lipstick, an eyeshadow, or a blush. 14. The assembly of claim 12 or 13, wherein the illumination device is carried by glasses. 15. Illumination device intended to be worn by the head of a user to modify the appearance of at least one region of his face coated with a cosmetic composition comprising at least one luminescent compound, the device being configured to emit light pulses in the direction of said region, and comprising an automatic analysis module of the user's environment and / or a receiver of a radio or optical control signal, the emission of the light pulses depending on the result of analysis or received signal. 16. Device according to the preceding claim, comprising at least one light source, in particular LED, emitting at an average wavelength between 280 nm and 500 nm, especially between 350 nm and 450 nm. 17. Device according to any one of claims 15 or 16, comprising a control circuit for triggering the emission of light pulses. 18. Device according to any one of claims 15 or 16, being connected by wireless communication to a control circuit for triggering the emission of light pulses. 19. Device according to any one of claims 15 to 18, being configured to illuminate the eyelashes, the eyelids, the lips, or the cheeks of the user. 20. Device according to any one of claims 15 to 19, in which the light power of the light pulses is between 0.001 Watt and 500 Watts, being in particular between 0.1 Watt and 100 W. 21. Device according to any one of claims 15 to 20, in which the extent of region illuminated by a light pulse is between 10 mm ² and 2500 mm ² . 22. Glasses intended to be worn by the head of a user to modify the appearance of at least one region of his face coated with a cosmetic composition comprising at least one luminescent compound, and carrying an illumination device configured for emitting light pulses towards said region and comprising an automatic analysis module of the user's environment and / or a receiver of a radio or optical control signal, the emission of light pulses depending on the result of analysis or received signal. 23. Jewel intended to be worn by the head of a user to modify the appearance of at least one region of his face coated with a cosmetic composition comprising at least one luminescent compound, and carrying an illumination device configured to emitting light pulses towards said region and comprising an automatic analysis module of the user's environment and / or a receiver of a radio or optical control signal, the emission of light pulses depending on the result of analysis or received signal.