Brain photo-stimulation device in the form of a stroboscopic light device

Abstract

The invention relates to a brain photo-stimulation device (1) comprising, in a housing (2), flashing light sources (3) and means (4) for managing the flashing frequency of the sources. The means (4) for managing the flashing frequency of the light sources (3) comprise, on the one hand, at least two oscillators (50, 51, 52, 53), each of the oscillators (50, 51, 52, 53) controlling at least the flashing frequency of at least one group (31, 32, 33, 34, 35, 36, 37, 38, 39) comprising at least one flashing light source (3) and, on the other hand, means (6) for controlling the oscillators (50, 51, 52, 53), such that each group comprising at least one light source (3) generates a clean strobe frequency (70, 71, 72, 73), which, together with at least one other strobe frequency (70, 71, 72, 73), forms a light signal (8) in the direction of a user (9).

Description

Description Title of the invention: Brain photostimulation device in the form of a stroboscopic light device

[0001] [The present invention relates to the field of photostimulation devices.

[0002] The main objective of the present invention is to propose a photo-stimulation device, in particular cerebral photo-stimulation, in the form of a stroboscopic light device having, through light, an action on the cognition of a user, leading, in particular, to an alteration of his state of consciousness, and the creation of an introspective state.

[0003] The photostimulation device generally comprises a source emitting light perceived by the user's eye, and a control device for controlling said source.

[0004] Traditionally, we know, in the state of the art, light therapy devices allowing the user to be exposed to an artificial light source having an intensity and a light spectrum close to those provided by sunlight.

[0005] Such devices are generally used to regulate circadian rhythm disorders, seasonal affective disorder or classic depression.

[0006] However, such devices do not allow action on the user's state of consciousness.

[0007] Also known in the state of the art, from the international application published under number WO 2010 / 139480, is a light therapy device comprising, necessarily, on the one hand, a continuous, or constant, uninterrupted light source, the intensity and color of which can vary and, on the other hand, a flickering light source which is superimposed on the first continuous light source so that the user is subjected to both light sources simultaneously.

[0008] The frequency of the flickering light is increased by means of a control module, between the beginning of the experiment, from an initial frequency, and the end of the experiment, where the aim is to reach a target frequency which is, at least, double the initial frequency, to induce a psychophysical experience in the subject by the phenomenon of acceleration of the flickering frequency.

[0009] Thus, in this document, it is only sought that the user feels the phenomenon of acceleration of the flicker during a session.

[0010] However, such an acceleration phenomenon induced by the increase in the flickering frequency of light sources between the start and the end of the session can have harmful effects on certain users.

[0011] In addition, since the light therapy device necessarily requires at least one continuous light source and a plurality of flickering light sources, it is of complicated design.

[0012] Also known from the state of the art is the American patent document US2010 / 130812 which describes a device for modulating projected light, so as to generate modulated output signals of a color component, for a light projection device.

[0013] The device described herein comprises a light modulator which generates color component output signals (red, green and blue) according to both an intensity and a color parameter, the color parameter and, in communication with said modulator, a color modulation generator for generating the modulated color signal.

[0014] This device, whose objective is to create a soft and scintillating vibration with an imperceptible effect, does not allow the generation of a stroboscopic signal, via a luminous flashing phenomenon, perceived by the user.

[0015] In addition, since this device requires means of modulating signals of different colors, it is also of complicated design.

[0016] We also know, from American patent document U S2021 / 023332, a system for promoting in particular the sleep of a user, which system receives, from at least one sensor, data associated with one or more biometric markers of the user to determine a brain state, based on data associated with the biometric marker(s), before determining a desired altered cognitive state of the user and causing a transmitter device to apply a stimulus to the user.

[0017] The aim of such a system is to facilitate the user's circadian training, and in particular to promote sleep.

[0018] In this system, the light emitting device comprises a first light and a second light, the first light being configured to emit a first wavelength of light, the second light being configured to emit a second wavelength.

[0019] The lights are controlled by a controller, based on data collected by biometric information sensors, including heart rate, blood flow, blood pressure, body temperature, etc. Based on this data, the controller system determines or predicts the user's cognitive state and determines the stimulus to be applied to the user to change it. In addition to being visual, the applied stimulus can be auditory, tactile, etc.

[0020] Here, the system, based on the presence of a plurality of biometric sensors intended to collect information on the user's state, is also of complex design.

[0021] The present invention is intended to remedy, at least in part, the drawbacks of the devices of the state of the art.

[0022] In an inventive approach, a cerebral photostimulation device was imagined comprising only flashing light sources, of the LED (light-emitting diode) type, arranged in a plurality of groups, which can be controlled independently of each other, so as to be able to generate different stroboscopic frequencies which accumulate to form a single stroboscopic signal, inducing a gentle modification of the cerebral activity of the user, through stimulation, initially, of the latter's optic nerve.

[0023] To this end, the invention relates to a photo-stimulation device in the form of a stroboscopic light device, comprising at least, in a housing, a plurality of flashing light sources under form of LEDs and means for managing the flashing frequency of said light sources.

[0024] Said photo-stimulation device according to the present invention is particular in that said means for managing the flashing frequency of the light sources comprise, on the one hand, at least two oscillators, each of the oscillators controlling the flashing frequency, the light intensity and the extinguishing / igniting duty cycle of at least one group comprising at least one flashing light source and, on the other hand, means for controlling said oscillators, so that each group comprising at least one light source generates its own stroboscopic frequency, the addition of which with at least one other stroboscopic frequency forms a stroboscopic light signal towards a user.

[0025] Furthermore, according to a feature of the stroboscopic device of the invention, said control means control said oscillators on the basis of a computer file in the form of a code of a stroboscopic light session which must be projected to the user, the session consisting of at least two successive steps, each step being defined by an index, a duration d and, at the beginning and at the end of the step, the flashing frequency f, the duty cycle R of a square signal with pulse width modulation applied to the flashing frequency (or extinguishing / ignition duty cycle or "duty cycle") and the light intensity L of the LEDs of the group(s) of LEDs to be controlled, the values ​​f, R and L being modified and recalculated at a given periodicity of between 80 ms and 120 ms.

[0026] According to particular embodiments of this photostimulation device:

[0027] - said means for controlling said oscillators consist of a microcontroller;

[0028] - it has four oscillators;

[0029] - it comprises nine groups, each comprising at least one and at most three flashing light source(s), the latter consisting of LEDs.

[0030] The present invention also relates to a method for managing sequences of control signals from the oscillators and intended for the drivers of the groups of LEDs of a cerebral photo-stimulation device according to the invention.

[0031] Such a method is characterized by the generation of at least one sequence of control signals by the oscillators, on the basis of a program selected from a plurality of predefined programs stored in the control means, the sequence consisting of at least two successive steps, each step performing a calculation of frequency and intensity for controlling the LEDs, each step being defined by an index, a duration d and a parameterization comprising the identification of the group or groups of LEDs to be controlled and, at the beginning and at the end of the step:

[0032] - the flashing frequency f of the LEDs of the group(s) of LEDs to be controlled;

[0033] - the duty cycle R of a pulse width modulated square signal applied to the flashing frequency of the group(s) of LEDs to be controlled; and

[0034] - the light intensity L of the group(s) of LEDs to be controlled, by modifying the duty cycle R of the square signal.

[0035] For each group of LEDs, the parameters can vary during a step, the values ​​of f, R and L being modified and recalculated at a predetermined periodicity p.

[0036] The periodicity p is advantageously between 80 ms and 120 ms.

[0037] As for the frequency of the square signal, it can be between 1 and 200 Hz.

[0038] It should be noted that the method for managing sequences of control signals from the oscillators and intended for the drivers of the groups of LEDs of a cerebral photo-stimulation device in accordance with the invention does not have a therapeutic objective and does not have a therapeutic effect for the purposes of curing or prophylaxis of a disease or organic dysfunction.

[0039] Other aims and advantages of the present invention will appear during the description which follows relating to embodiments which are given only as indicative and non-limiting examples.

[0040] Understanding of this description will be facilitated by referring to the attached drawings in which:

[0041] [Fig.1] represents a schematic view of a particular embodiment of the cerebral photo-stimulation device according to the invention, comprising a plurality of flashing light sources arranged in groups, each of the groups being managed independently of the other groups by a control means for the emission of a light signal towards a user.

[0042] [Fig.2] represents a second schematic view of the cerebral photostimulation device of figure 1.

[0043] With reference to the figures of the attached drawings, the present invention relates to a cerebral photo-stimulation device 1 having the final objective of generating, in a user, a modification of his or her cerebral activity, via a phenomenon of flickering, or flashing, light, which is perceived by the user's eye.

[0044] The cerebral photo-stimulation device 1 in accordance with the present invention incorporates, within a housing 2 advantageously in the form of a lamp which can have various shapes and dimensions.

[0045] Within this housing 2 are found a plurality of flashing light sources 3, symbolized, in figure 1 of the attached drawings, by triangular shapes.

[0046] Advantageously, said flashing light sources 3 consist of flashing light-emitting diodes, or LEDs.

[0047] According to a preferred characteristic of the cerebral photo-stimulation device 1 of the invention, the latter comprises only flashing light sources, and does not incorporate any continuous light source.

[0048] It should also be noted that, advantageously, the device 1 of the invention only comprises light sources emitting white light, and no light source emitting light of another color, which allows a simplification of the device, compared to certain existing devices in the state of the art.

[0049] In the present brain photostimulation device 1, in accordance with what is illustrated in the figures, the flashing light sources 3 are arranged in a plurality of groups referenced 31 to 39, each of these groups incorporating at least one flashing light source 3, consisting in particular of an LED.

[0050] Preferably, each of the groups 31 to 39 of flashing light source(s) comprises between one and three LEDs 3.

[0051] Thus, in Figure 1, groups 31, 32, 34, 38 comprise three flashing light sources 3, while groups 33, 35, 36, 39 each comprise two flashing light sources, and, finally, group 37 only comprises one.

[0052] Obviously, this is a particular example of an embodiment of the present cerebral photo-stimulation device 1, which should not, under any circumstances, be considered as limiting the invention.

[0053] In particular, the number of groups of flashing light sources, which is nine in the attached figure 1, can be increased or reduced, as can the number of flashing light sources 3 within each of these groups.

[0054] In addition to the plurality of flashing light sources 3 arranged in the form of groups, the cerebral photo-stimulation device 1 of the invention comprises means 4 for managing the flashing frequency of said flashing light sources 3, and also the light intensity and the switching-on / switch-on cycle ratio of these light sources 3.

[0055] Note that the extinction / ignition cycle ratio, which can also be commonly called “duty cycle”, corresponds, over a given period of time, to the duration during which the light source is lit in relation to the total duration of the period (ignition + extinction time).

[0056] According to a particular feature specific to the present cerebral photo-stimulation device 1, these management means 4 comprise, on the one hand, at least two oscillators and, on the other hand, means 6 for controlling said oscillators, consisting in particular of a microcontroller 6.

[0057] The microcontroller 6 controls the oscillators according to information from a computer file 61 in the form of a code of a strobe light session which is to be projected to the user.

[0058] In a preferred and non-limiting embodiment of the invention, said cerebral photo-stimulation device 1 comprises more than two oscillators, and in particular three, or even four oscillators, each having its own operating frequency.

[0059] Note that, in a preferred embodiment, the oscillators are in the microcontroller 6.

[0060] The preferred embodiment illustrated in figures 1 and 2 of the attached drawings also illustrates a cerebral photo-stimulation device 1 whose means for managing the flashing frequency, the light intensity, and the switching-off / switching-on ratio of the light sources 3 comprise four oscillators 50, 51, 52 and 53.

[0061] Each of these oscillators 50, 51, 52, 53 has the function of controlling, at least, the flashing frequency, the light intensity, and the switching off / on ratio, of at least one group 31 to 39 comprising at least one flashing light source 3.

[0062] Thus, said oscillators 50, 51, 52, 53 control the parameters of each of the groups 31 to 39 of flashing light sources 3, from the start to the end of a session projected to a user.

[0063] Thus, each group of flashing light sources can be controlled by an oscillator independently of the other group, or, as the case may be, of the other groups, of flashing light sources 3, with regard to the flashing frequency, the light intensity and the switching-off / switching-on duty cycle.

[0064] Thus, each group 31 to 39 comprising at least one light source 3 generates, by means of the at least two oscillators, a specific stroboscopic frequency with also a specific light intensity and duty cycle, the addition of which with at least one other signal also having a particular stroboscopic frequency / intensity / duty cycle, forms a light signal 8 in the direction of a user 9.

[0065] In the example illustrated in the attached figure 2, each of the four oscillators 50, 51, 52, 53 sends a command, via an electrical signal, of a stroboscopic frequency, respectively 70, 71, 72, 73, to the group(s) of flashing light source(s) that it controls.

[0066] It should be noted that, according to the instructions transmitted by the control means 6, each of the four oscillators 50, 51, 52, 53 will be able to control the operation of none, one, or several group(s) of flashing light source(s) among all the groups that the device 1 comprises.

[0067] The simultaneous operation of the different oscillators 50, 51, 52, 53 therefore makes it possible to create different variations of light parameters on separate LEDs, arranged in groups.

[0068] In short, the light flicker 8 finally emitted by the cerebral photo-stimulation device 1 of the invention corresponds to a combination of the different stroboscopic light frequencies 70, 71, 72, 73 emitted by the groups 31 to 39 of flashing light sources 3, under the control of the oscillators 50, 51, 52, 53, controlled by the microcontroller 6.

[0069] By this means, the user 9, who is positioned relative to the cerebral photo-stimulation device 1 of the invention so as to perceive, with his eyes closed, the luminous flashing emitted by the flashing light sources 3 which the said device 1 comprises, will feel different effects.

[0070] On the one hand, the user perceives visual hallucinations, in particular in the form of colors, geometric patterns, movement, textures, light patterns and, consequently, overall, a subjective impression of a change in visual perception.

[0071] On the other hand, the user will experience an altered state of consciousness. Through the new brain activity, or rhythm, induced by the brain photostimulation device 1, a non-ordinary state of consciousness will be established. In this non-ordinary state, certain brain waves of frequency higher or lower, compared to the brain wave frequency of an ordinary state of consciousness, will appear or be more present.

[0072] It is also conceivable that the cerebral photo-stimulation device 1 of the invention induces, in the user, according to the light signals emitted, a state of sleep.

[0073] An effect induced by means of the cerebral photostimulation device 1 of the invention may persist after the end of the experiment, in other words once the light session has ended. This is not the case, however, with regard to visual hallucinations, which are likely to develop only during the experiment.

[0074] Depending on the combination in particular of light flashing frequencies controlled by the oscillators under the control of the control means 6, the cerebral photo-stimulation device 1 is capable of leading the user 9 to a second state by a phenomenon of synchronization of his cerebral electrical activity.

[0075] For this purpose, the control means 6, in the form of a microcontroller, act on the basis of a computer file 61 in the form of a code of the stroboscopic light session which must be projected to the user. The stroboscopic light sessions can be modified so as to adapt the light signal 8 which is finally emitted following the combination of light frequencies, intensities and extinction / ignition ratios, according to the effect which is sought on the user 9.

[0076] It should be noted that the control means 6 of the photo-stimulation device 1 according to the present invention can, in an exemplary embodiment, be connected to a computer application containing the digital files for controlling the lamp.

[0077] Thus, the user or a professional can directly select, from a smartphone or a tablet in particular, a session or light sequence for the execution of the stroboscopic sequence by the photostimulation lamp 1.

[0078] According to a particular feature of the device 1 of the invention, said control means 6 therefore control said oscillators 50, 51, 52, 53 on the basis of a computer file 61 in the form of a code of the stroboscopic light session which must be projected to the user.

[0079] The light session in question consists of at least two successive steps, and preferably a plurality of steps, and each of these steps is defined by an index, a duration d and, at the beginning and at the end of the step, the flashing frequency f, the cyclic ratio R of extinction / ignition (or cyclic ratio of a square signal with pulse width modulation applied to the flashing frequency, or "duty cycle") and the luminous intensity L of the LEDs of the group(s) of LEDs to be controlled, the values ​​f, R and L being modified and recalculated at a given periodicity of between 80 ms and 120 ms.

[0080] Thus, the cerebral photo-stimulation device 1 of the invention allows, in addition to modulation of the stroboscopic light modalities in a precise and complex manner, but above all in optimal control of temporal variability.

[0081] As mentioned previously, modulation is carried out on four main dimensions:

[0082] - Frequency in Hertz

[0083] - Turn-on / turn-on ratio or “duty cycle”

[0084] - Light Intensity

[0085] - Time

[0086] In other words, one of the main characteristics and the specificity of said device 1 lies in the control of the evolution of the aforementioned parameters over time, such temporal variability making it possible to give the device 1 its capacity to generate a light signal that is both complex and precise.

[0087] More specifically, each strobe session is composed of several steps, each defined by a duration, in seconds, and six data:

[0088] - Duration (T0 to T1)

[0089] - Duty Cycle at start (TO)

[0090] - Light Intensity at Start (TO)

[0091] - Frequency at start (TO)

[0092] - Duty Cycle at the end (T 1 )

[0093] - Light Intensity at the end (T 1 )

[0094] - Frequency at the end (T 1 )

[0095] A strobe light session can consist of hundreds of these steps, each with its own parameters, which evolve over time according to a specific algorithm.

[0096] The control means 6, which comprise said device 1, are designed to manage this temporal complexity. To ensure a smooth transition between the different "stages", each evolution is divided into segments with a periodicity p of between 80 and 120 ms, preferably 100 ms.

[0097] This time division allows the recalculation of the new value to be applied to each parameter, thus providing an impression of fluidity and continuity in the evolution of the stroboscopic parameters.

[0098] Example of a stroboscopic session with temporal variability

[0099] The example below is for a 10-second strobe session consisting of two separate steps:

[0100] Step 1: Duration 0 to 5 seconds

[0101] - Duty Cycle at the start (T0): 20%

[0102] - Light intensity at the start (T0): 50%

[0103] - Frequency at start (T0): 10 Hz

[0104] - Duty Cycle at the end (T1): 40%

[0105] - Light Intensity at the end (T1): 70%

[0106] - Frequency at the end (T1): 15 Hz

[0107] Step 2: 5 to 10 seconds

[0108] - Duty Cycle at start (T0): 40%

[0109] - Light intensity at the start (T0): 70%

[0110] - Frequency at start (TO): 15 Hz

[0111] - Duty Cycle at the end (T1): 60%

[0112] - Light Intensity at the end (T1): 90%

[0113] - Frequency at the end (T1): 20 Hz

[0114] In this example, the time operation is as follows:

[0115] - from 0 to 5 seconds: The system starts with a duty cycle of 20%, a light intensity of 50% and a frequency of 10 Hz. During these 5 seconds, each parameter gradually evolves until reaching the values ​​of T1 (40% for the duty cycle, 70% for the light intensity and 15 Hz for the frequency).

[0116] - 5 to 10 seconds: The system continues to evolve from the T1 values ​​of step 1 (which correspond to the T0 values ​​of step 2) to reach the T1 values ​​of step 2.

[0117] To ensure a smooth transition, the control means 6 of the device 1, based on the computer file 61 in the form of a session code, divide each step into segments, for example, of 100 ms. Thus, during step 1, the system recalculates the values ​​of each parameter every 100 ms to ensure a smooth transition from T0 to T1.

[0118] Thus, the present invention also relates to a method for managing sequences of control signals from the oscillators 50, 51, 52, 53 and intended for the drivers of the groups 31, 32, 33, 34, 35, 36, 37, 38, 39 of light sources 3, in particular LEDs of a cerebral photostimulation device 1 according to the invention.

[0119] In this method, at least one sequence of control signals is generated by the oscillators 50, 51, 52, 53, on the basis of a program selected from a plurality of predefined programs stored in the control means 6.

[0120] The signal sequence thus generated consists of at least two successive steps, and each of these steps performs at least one frequency and intensity calculation for controlling the LEDs 3.

[0121] Most preferably, each successive step of the sequence is defined by an index, a duration d and a parameter including the identification of the group(s) of LEDs to be controlled and, at the beginning and end of the step:

[0122] - the flashing frequency f of the LEDs of the group(s) of LEDs to be controlled;

[0123] - the cyclic ratio R of extinction ignition (or cyclic ratio of a square signal with pulse width modulation applied to the flashing frequency or “duty cycle”) of the group(s) of LEDs to be controlled; and

[0124] - the light intensity L of the group(s) of LEDs to be controlled, by modifying the duty cycle R of the square signal.

[0125] For each group of LEDs, the parameters can vary during a step, the values ​​of f, R and L being modified and recalculated at a predetermined periodicity p.

[0126] Thus, during this duration d of a step, the control system 6 periodically and at regular time intervals, for example according to this periodicity p which is preferably between 80 and 120 ms, preferably every 100 ms, performs a verification of the parameters (brightness, duty cycle, flashing frequency) applied by each of the oscillators to the group(s) of LEDs that it controls, in comparison with the information contained in the computer program that has been selected for the user.

[0127] If at least one of the parameters applied by one of the oscillators is no longer in line with the information in the computer file, the latter is modified by the control system 6 so that the control signal sent by the oscillator to the group(s) of LEDs that it controls is again in line.

[0128] On the contrary, if the parameters applied by each of the oscillators are always in line with the information in the computer file, no change in the control signals is made by the system. pilot 6, and it performs a check again, for example 100 ms later.

[0129] Thus, a sequence or session consists more particularly of a series of instructions intended for a group of LEDs, controlled by an oscillator, over a given time and on certain parameters which correspond to variables inherent to stroboscopic light effects, namely at least the flashing frequency of the LEDs, and possibly the light intensity and / or a cyclical extinction / ignition ratio.

[0130] A sequence will give, to one or more groups of LEDs, one or more series of modifications of this or these variable(s). In short, over a given time, each group of LEDs can follow a different instruction so that different stroboscopic effects accumulate to form the light signal 8 for the user 9.

[0131] More particularly, a complete sequence is composed of a plurality of stages which can also be called "steps".

[0132] Each step is therefore defined by a duration and the parameterization of the oscillators, in particular the four oscillators 50, 51, 52, 53, taking the preferred embodiment of figures 1 and 2.

[0133] In short, each of the steps of a light session is composed of a set of data linked to the evolution of the variables, such as the light intensity, the cyclic ratio of extinction / ignition and the flashing frequency, of the different oscillators 50, 51, 52, 53 for the different groups of LEDs, each step taking place over a given time.

[0134] For the record, each oscillator 50, 51, 52, 53 can configure in the same way several groups of LEDs 3 chosen from groups 31 to 39 illustrated in figure 1.

[0135] One or more oscillator(s) 50, 51, 52, 53 can also configure a single group 31 to 39 of LEDs.

[0136] In the case of a photo-stimulation device 1 comprising four oscillators 50, 51, 52, 53, it is therefore possible to obtain, at most, four different LED operations per step.

[0137] Oscillators 50, 51, 52, 53 can be defined in particular with the following parameters:

[0138] - Group(s) of LEDs that they will control;

[0139] - Flashing frequency at the start and end of the step; note here that the flashing frequency of the LEDs can be fixed throughout the session, therefore at the start and end of a step, and from one step to another. This frequency can also be variable during a session, for example according to a linear increase or decrease over a certain duration during said session; for example, on a step of a light session, the flashing frequency of a group of LEDs controlled by an oscillator can increase from a starting frequency of 12 Hz to an arrival frequency equal to 16 Hz, over a step duration of, for example, 1 minute;

[0140] - Cyclic ratio of this flashing frequency at the start and end of the step;

[0141] - light intensity of the LEDs at the beginning and end of the stage.

[0142] Each oscillator 50, 51, 52, 53 therefore controls a flashing frequency specific to at least one group 31 to 39 of flashing light sources 3, or LEDs. The system can therefore have groups of LEDs which can flash at different frequencies from each other.

[0143] It should also be noted that several brain photostimulation devices 1 according to the invention can be networked so as to allow synchronized activity of these devices and the emission of different light signals 8 for the attention of a user 9.

Claims

Claims

1. [Brain photo-stimulation device (1) in the form of a stroboscopic light apparatus, comprising at least, in a housing (2), a plurality of flashing light sources (3) in the form of LEDs and means (4) for managing the flashing frequency of said light sources (2), said photo-stimulation device (1) being characterized in that said means (4) for managing the flashing frequency of the light sources (3) comprise, on the one hand, at least two oscillators (50, 51, 52, 53), each of the oscillators (50, 51, 52, 53) controlling the flashing frequency, the light intensity and the extinguishing / igniting duty cycle of at least one group (31, 32, 33, 34, 35, 36, 37, 38, 39) comprising at least a flashing light source (3) and, on the other hand, means (6) for controlling said oscillators (50, 51, 52, 53),such that each group comprising at least one light source (3) generates a specific stroboscopic frequency (70, 71, 72, 73) the addition of which with at least one other stroboscopic frequency (70, 71, 72, 73) forms a stroboscopic light signal (8) in the direction of a user (9) and in that said control means (6) control said oscillators (50, 51, 52, 53) on the basis of a computer file (61) in the form of a code of the stroboscopic light session which must be projected to the user, the session consisting of at least two successive stages, each stage being defined by an index, a duration d and, at the beginning and at the end of the stage, the flashing frequency f, the duty cycle R of a square signal with pulse width modulation applied to the flashing frequency and the light intensity L of the LEDs of the group or groups of LEDs to be controlled, the f values,R and L being modified and recalculated at a given periodicity between 80 ms and 120 ms.,

2. Cerebral photo-stimulation device (1) according to claim 1 characterized in that said control means (6) of said oscillators (50, 51, 52, 53) consist of a microcontroller.

3. Cerebral photo-stimulation device (1) according to claim 1 or claim 2 characterized in that it comprises four oscillators (50, 51, 52, 53) each having its own operating frequency.

4. Brain photostimulation device (1) according to claim 2, characterized in that the oscillators (50, 51, 52, 53) are in the microcontroller.

5. Cerebral photo-stimulation device (1) according to any one of the preceding claims, characterized in that it comprises nine groups (31, 32, 33, 34, 35, 36, 37, 38, 39) each comprising at least one and at most three flashing light source(s) (3), the latter consisting of LEDs.

6. Method for managing sequences of control signals from the oscillators (50, 51, 52, 53) and intended for drivers of the groups (31, 32, 33, 34, 35, 36, 37, 38, 39) of LEDs of a cerebral photo-stimulation device (1) according to one of claims 1 to 5, characterized by the generation of at least one sequence of control signals by the oscillators (50, 51, 52, 53), on the basis of a program selected from a plurality of predefined programs stored in the control means (6), the sequence consisting of at least two successive steps, each step carrying out a calculation of frequency and intensity for the control of the LEDs, each step being defined by an index, a duration d and a parameterization comprising the identification of the group or groups of LEDs to be controlled and, at the beginning and at the end of the step: - the flashing frequency f of the LEDs of the group(s) of LEDs to be controlled; - the duty cycle R of a pulse width modulated square signal applied to the flashing frequency of the group(s) of LEDs to be controlled; and - the luminous intensity L of the group(s) of LEDs to be controlled, by modifying the duty cycle R of the square signal and in that for each group of LEDs, the parameters can vary during a step, the values ​​of f, R and L being modified and recalculated at a predetermined periodicity p of between 80 and 120 ms.

7. Method for managing sequences of control signals according to claim 6 in which the periodicity p is equal to 100 ms.

8. A method of managing control signal sequences according to claim 6 or claim 7 wherein the frequency of the square signal is 1 to 200 Hz.]

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