RU2785855C2 - Provision of feedback to user of shaving device during shaving procedure - Google Patents

Abstract

FIELD: personal hygiene.

SUBSTANCE: invention relates to the field of personal hygiene, namely to a method for shaving with provision of feedback by pressure, using which a shaving device is applied to the skin. Values for one or more parameters are determined, as which at least one of the following is used: a shaving frequency indicator indicating how often a user performs a shaving procedure, using the shaving device, a skin irritation indicator indicating skin irritation appearing in the user during the shaving procedure, using the shaving device and/or after it, a shaving proximity indicator indicating a hair length desired by the user after the shaving procedure, using the shaving device, and whether the shaving device is used on wet or dry skin during the shaving procedure. A pressure range is determined for the user based on determined values of one or more parameters, while the pressure range has an upper pressure threshold and a lower pressure threshold. Values of measurement of pressure, which is pressure, using which the shaving device is applied to the user’s skin, are received. The shaving procedure is performed using the shaving device, and received values of pressure measurement are compared with the determined pressure range for determination of user feedback related to applied pressures, taking into account the determined pressure range. A feedback control signal is output to a feedback component connected to the shaving device, wherein the feedback control signal is intended for control of the feedback component for provision for the user of certain feedback.

EFFECT: improvement of the shaving quality is achieved.

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Description

FIELD OF TECHNOLOGY

The invention relates to a computer-implemented method, apparatus, and computer program product for providing feedback to a user of a shaving device during a shaving procedure, and in particular to feedback relating to the pressure with which the shaving device is applied to the skin.

BACKGROUND OF THE INVENTION

Shaving performance, for example in terms of closeness of shave and irritation caused to the skin, is greatly affected by the handling of the razor by the user. It is known that people with a high degree of skin irritation after shaving can benefit from advice or guidance on how to improve the movement and pressure with which the razor is applied to the user's skin during the shaving procedure.

Despite various improvements in razors over the years to ensure a good shave and the best results, recent tests have shown that a large proportion of men do not use the correct shaving technique when shaving their face in terms of applying the razor with the correct pressure and moving the razor correctly. movement. Particularly in the case of rotary razors (in which hair is cut using cutting elements that comprise one or more rapidly rotating circular blades), many men press the razor too hard or too little against their skin and use a linear motion instead of a circular motion. Using a razor with a suboptimal shaving technique may result in unsatisfactory shaving results.

Therefore, it is desirable to indicate to users the optimal shaving technique. WO 2018/206805 describes that feedback can be provided regarding the movement of the rotary shaver to encourage the user to move the rotary shaver using a slight rotational motion. However, as noted above, it is also desirable for the user to apply the shaving device to the skin with appropriate pressure.

Therefore, there is a need for methods that detect and provide appropriate feedback regarding the pressure with which the razor is applied to the skin, which can prompt the user to use the correct pressure.

DISCLOSURE OF THE INVENTION

According to a first aspect, a computer-implemented method is provided for providing feedback to a user of a shaving device during a shaving procedure. The method includes: determining values for one or more parameters, the one or more parameters including at least one of the following: (i) a shaving frequency value indicating how often a user performs shaving procedures using a shaving device, (ii) an irritation value skin irritation indicative of skin irritation experienced by the user during and/or after a shaving procedure using a shaving device, (iii) a closeness index indicating how short the hair should be desired by the user after shaving using a shaving device, and (iv a) whether the shaver is used on wet or dry skin during shaving; determining for the user a pressure range based on the determined values of one or more parameters, wherein the pressure range has an upper pressure threshold and a lower pressure threshold; receiving pressure measurement values representing the pressure with which the shaving device is applied to the user's skin during a shaving procedure using the shaving device; comparing the received pressure measurement values with the determined pressure range to determine feedback to the user regarding the applied pressures given the determined pressure range; and outputting a feedback control signal to a feedback component associated with the shaving device, wherein the feedback control signal is for controlling the feedback component to provide the user with specific feedback. Thus, the first aspect provides the ability to determine and provide appropriate feedback on the pressure with which the shaving device is applied to the skin, which may prompt the user to use the correct pressure.

In some embodiments, the step of determining values includes determining values for all of shave frequency metrics, skin irritation metrics, shave proximity metrics, and whether the shaving device is being used on wet or dry skin.

In some embodiments, when one or more of the parameters includes at least a shave frequency value, the step of determining the pressure range may include setting the lower pressure threshold to a first lower pressure threshold when the shave frequency value is at the first shave frequency value, and setting the lower pressure threshold pressure on the second lower pressure threshold, when the shaving frequency indicator has a second shaving frequency value, wherein the first shaving frequency value represents more frequent shaving than the second shaving frequency value, and the first lower pressure threshold value is lower than the second lower pressure threshold value. Thus, the more often the user performs shaving procedures, the lower the lower pressure threshold.

In some embodiments, when one or more of the parameters includes at least a skin irritation score, the step of determining the pressure range may include setting the upper pressure threshold to a first pressure upper threshold when the skin irritation score is at the first skin irritation value, and setting the pressure upper threshold to a second upper pressure threshold value, when the skin irritation index has a second skin irritation value, wherein the first skin irritation value represents a greater skin irritation than the second skin irritation value, and the first upper pressure threshold value is lower than the second upper pressure threshold value. Thus, the higher the skin irritation, the lower the upper pressure threshold, since skin irritation can be caused or exacerbated by pressing the shaver too hard against the skin.

In some embodiments, when one or more of the parameters includes at least a closeness value, the step of determining the pressure range may include setting the upper pressure threshold to a first upper pressure threshold when the closeness value is at the first closeness value, and setting the upper pressure threshold to a second upper pressure threshold when the shaving proximity index has a second shaving proximity value, wherein the first shaving proximity value represents a closer shave than the second shaving proximity value, and the first upper pressure threshold value is higher than the second upper pressure threshold value. Thus, the closer the shave should be (ie, the shorter the hair after the shave), the higher the upper pressure threshold should be.

In some embodiments, when one or more of the parameters includes at least determining whether the shaver is being used on wet or dry skin during a shaving procedure, the step of determining a pressure range may include setting a pressure high threshold to a first high pressure threshold when the shaver the device is used on dry skin, and setting the upper pressure threshold to the second upper pressure threshold when the shaving device is used on wet skin, wherein the first upper pressure threshold is higher than the second upper pressure threshold. Thus, the upper pressure threshold is lower when the shaving device is used on wet skin than when compared to dry skin.

In some embodiments, the step of determining values includes receiving one or more values as input through a user interface. This allows the user to enter their preferred values for one or more parameters, such as desired closeness and/or frequency of shaving.

In some embodiments, one or more of the parameters includes at least a measure of shaving frequency, and the step of determining the values includes obtaining information about the use of the shaving device for a certain period of time; and analyzing the usage information to determine how often the user shaves. Thus, in some embodiments, the shaving frequency score may be determined automatically.

In some embodiments, one or more of the parameters includes at least a skin irritation score, and the step of determining the values includes receiving a first measurement signal from a first sensor that observes or measures the user's skin; and analyzing the received first measurement signal to determine the amount of skin irritation. Thus, in some embodiments, the skin irritation score may be determined automatically.

In some embodiments, one or more of the parameters includes at least determining whether the shaver is being used on wet or dry skin during a shaving procedure, and determining the values includes receiving a second measurement signal from a moisture sensor that measures moisture on the user's skin and /or on a shaving device; and analyzing the received second measurement signal to determine whether the shaving device is used on wet or dry skin during the shaving procedure. Thus, in some embodiments, the determination of whether the shaving device is being used on wet or dry skin may be performed automatically.

In some embodiments, the step of determining feedback includes determining a first feedback indicating correct pressure if the applied pressure is within a certain pressure range and determining a second feedback indicating incorrect pressure if the applied pressure is outside a certain pressure range.

In these embodiments, the pressure range may further include a first boundary region near the lower pressure threshold and a second boundary region near the upper pressure threshold; and the step of determining the feedback may include: (i) determining the first feedback indicating the correct pressure if the applied pressure is within a certain pressure range and outside the first boundary region and the second boundary region; (ii) determining a second feedback indicating an incorrect pressure if the applied pressure is outside the predetermined pressure range and outside the first boundary region and the second boundary region; and (iii) determining the intermediate feedback if the applied pressure is within the first boundary region or the second boundary region, wherein the intermediate feedback is a weighted combination of the first feedback and the second feedback, with each weighting for the first feedback and the weighting for the second feedback is performed based on linear functions of the applied pressure. Thus, these embodiments provide for a gradual transition between the first feedback and the second feedback, which can help the user interpret the feedback and adjust their actions to the correct pressure.

In alternative embodiments, the step of determining feedback includes determining a first feedback indicating correct pressure if the applied pressure is within a certain pressure range, determining a second feedback indicating low incorrect pressure if the applied pressure is below a low pressure threshold, and determining a third feedback. a link indicating a high incorrect pressure if the applied pressure is above the upper pressure threshold. The advantage of these embodiments is that the adjustment required from the user to achieve the correct pressure is more intuitive due to the fact that the feedback is different depending on whether the applied pressure is too high or too low.

In these embodiments, the pressure range may further comprise a first boundary region near the lower pressure threshold and a second boundary region near the upper pressure threshold; and the step of determining the feedback may include: (i) determining the first feedback indicating the correct pressure if the applied pressure is within a certain pressure range and outside the first boundary region and the second boundary region; (ii) determining a second feedback indicating low incorrect pressure if the applied pressure is below a lower pressure threshold and outside the first boundary region; (iii) determining a third feedback indicating a high false pressure if the applied pressure is above an upper pressure threshold and outside the second boundary region; (iv) determining the first intermediate feedback if the applied pressure is within the first boundary region, wherein the first intermediate feedback is a weighted combination of the first feedback and the second feedback, with each weighting for the first feedback and weighting for the second feedback perform on the basis of linear functions of the applied pressure; and (v) determining a second intermediate feedback if the applied pressure is within the second boundary region, wherein the second intermediate feedback is a weighted combination of the first feedback and the third feedback; wherein each weighting for the first feedback and the weighting for the third feedback are performed based on linear functions of the applied pressure. Thus, these embodiments provide a gradual transition between the first feedback and the second feedback, as well as between the first and third feedback, which can further assist the user in interpreting the feedback and adjusting their actions according to the correct pressure.

In some embodiments, the specific feedback is the color of one or more light elements. In alternative embodiments, the feedback component is one or more of the following: one or more light elements, one or more speakers, a display screen, and one or more haptic feedback components.

In some embodiments, the comparison step comprises filtering the received pressure measurement values with a low pass filter and comparing the filtered pressure measurement values to a specific pressure range to establish feedback. Because the applied pressure/force may change over a fairly short period of time during a shave and/or there may be noise/artifacts in the measured pressure, the advantage of low-pass filtering is that it avoids fast feedback changes, as this can complicate for the user to adjust their use of the shaving device in an appropriate manner, and this may distract the user's attention. In these embodiments, the implementation of the low-pass filter may have a time constant selected from the range from 0.1 seconds to 0.7 seconds, such as 0.2 seconds.

In some embodiments, the method further includes the steps of: obtaining movement measurements representing the movement of the shaving device by the user during a shaving procedure; processing the received movement measurements to determine by the user the type of movement of the shaving device; and determining motion feedback for the user related to the particular type of motion; wherein the feedback control signal is further for controlling the feedback component to provide the user with specific motion feedback. Thus, these embodiments provide feedback on both the pressure with which the shaving device is pressed against the skin and the movement of the shaving device.

In some embodiments, the method further includes the steps of receiving, after one or more shaves, an indication of user satisfaction with the one or more shaves; if the received indication indicates that the user is not satisfied with one or more shaving operations, providing the user with an output prompting the user to change the value of one or more parameters.

In some embodiments, the implementation of the method is performed in a shaving device. In alternative embodiments, the method is performed in a device separate from the shaving device.

In some embodiments, the feedback component is part of the shaving device.

According to a second aspect, a computer program product is provided, comprising a computer readable medium. The computer-readable medium has computer-readable code embodied therein. The computer readable code is configured such that, when executed by a suitable computer or processor, the computer or processor executes the method according to the first aspect, or any embodiment thereof.

According to a third aspect, a device is provided for providing feedback to a user of the shaving device during a shaving procedure. The device comprises a processing unit configured to: determine values of one or more parameters, wherein one or more parameters includes at least one of the following: (i) a shaving frequency indicator indicating how often the user performs shaving procedures using the shaving device, ( ii) a skin irritation score indicating skin irritation experienced by the user during and/or after shaving using the shaving device; (iii) a shave proximity score indicating how short the user's hair should be after a shave using the razor, and (iv) whether the razor is used on wet or dry skin during the shave; determining for the user a pressure range based on determined values for one or more parameters, wherein the pressure range has an upper pressure threshold and a lower pressure threshold; receiving pressure measurement values during a shaving procedure using the shaving device representing the pressure with which the shaving device is applied to the user's skin; comparing the received pressure measurement values with a certain pressure range to determine for the user feedback related to the applied pressures, taking into account the determined pressure range; and outputting a feedback control signal to a feedback component associated with the shaving device, wherein the feedback control signal is for controlling the feedback component to provide user specific feedback. Thus, the third aspect provides the ability to determine and provide suitable feedback regarding the pressure with which the shaving device is applied to the skin, which can prompt the user to use the correct shaving pressure.

In some embodiments, the processing unit is configured to determine values for all shave frequency metrics, skin irritation metrics, shave proximity metrics, and whether the shaver is being used on wet or dry skin.

In some embodiments, when one or more of the parameters includes at least a shave frequency value, the processing unit may be configured to determine a pressure range by setting the lower pressure threshold to a first lower pressure threshold when the shave frequency parameter has a first shave frequency value, and setting the lower pressure threshold to a second lower pressure threshold when the shaving frequency value has a second shaving frequency value, wherein the first shaving frequency value represents more frequent shaving than the second shaving frequency value and the first lower pressure threshold value is lower than the second lower shaving frequency value. pressure threshold. Thus, the more often the user performs shaving procedures, the lower the lower pressure threshold.

In some embodiments, when one or more of the parameters includes at least a skin irritation score, the step of determining the pressure range may include setting the upper pressure threshold to a first pressure upper threshold when the skin irritation score is at the first skin irritation value, and setting the pressure upper threshold to a second upper pressure threshold value, when the skin irritation index has a second skin irritation value, wherein the first skin irritation value represents a greater skin irritation than the second skin irritation value, and the first upper pressure threshold value is lower than the second upper pressure threshold value. Thus, the higher the skin irritation, the lower the upper pressure threshold, since skin irritation can be caused or exacerbated by pressing the shaver too hard against the skin.

In some embodiments, when one or more of the parameters includes at least a shave proximity score, the processing unit may be configured to determine a pressure range by setting an upper pressure threshold to a first upper pressure threshold when the shave proximity score has a first shave proximity value, and setting the upper pressure threshold to a second upper pressure threshold when the shaving proximity value has a second shaving proximity value, wherein the first shaving proximity value represents a closer shave than the second shaving proximity value, and the first upper pressure threshold value is higher than the second upper pressure threshold. pressure threshold. Thus, the closer the shave should be (ie, the shorter the hair after the shave), the higher the upper pressure threshold should be.

In some embodiments, when one or more of the parameters includes at least determining whether the shaver is being used on wet or dry skin during a shaving procedure, the processing unit may be configured to determine a pressure range by setting the upper pressure threshold to the first an upper pressure threshold when the shaving device is used on dry skin; and setting the upper pressure threshold to a second upper pressure threshold when the shaving device is used on wet skin, wherein the first upper pressure threshold is higher than the second upper pressure threshold. Thus, the upper pressure threshold is lower if the shaving device is used on wet skin than when compared to dry skin.

In some embodiments, the processing unit is configured to determine values by receiving one or more values as input via a user interface. This allows the user to enter their preferred values for one or more parameters, such as desired closeness and/or frequency of shaving.

In some embodiments, one or more of the parameters includes at least a shaving frequency value and the processing unit is configured to determine the values by receiving information about the use of the shaving device over a period of time; and analyzing the usage information to determine how often the user shaves. Thus, in some embodiments, the shaving frequency value may be determined automatically.

In some embodiments, one or more of the parameters includes at least a skin irritation score and the processing unit is configured to determine the values by receiving a first measurement signal from a first sensor that observes or measures the user's skin; and analyzing the received first measurement signal to determine the amount of skin irritation. Thus, in some embodiments, the skin irritation score may be determined automatically.

In some embodiments, one or more of the parameters includes at least determining whether the shaver is being used on wet or dry skin during the shaving procedure, and the processing unit is configured to determine the values by receiving a second measurement signal from a moisture sensor that measures moisture. on the user's skin and/or on the shaving device; and analyzing the received second measurement signal to determine whether the shaving device is used on wet or dry skin during the shaving procedure. Thus, in some embodiments, it is possible to automatically determine whether the shaving device is being used on wet or dry skin.

In some embodiments, the processing unit is configured to provide feedback by determining a first feedback indicating correct pressure if the applied pressure is within a certain pressure range and determining a second feedback indicating incorrect pressure if the applied pressure is outside a certain pressure range. pressure.

In these embodiments, the pressure range may further include a first boundary region near the lower pressure threshold and a second boundary region near the upper pressure threshold; and the processing unit may be further configured to provide feedback by: (i) determining a first feedback indicating the correct pressure if the applied pressure is within a certain pressure range and outside of the first boundary region and the second boundary region; (ii) determining a second feedback indicating incorrect pressure if the applied pressure is outside the determined pressure range and outside the first boundary region and the second boundary region; and (iii) determining the intermediate feedback if the applied pressure is within the first boundary region or the second boundary region, wherein the intermediate feedback is a weighted combination of the first feedback and the second feedback, with each weighting for the first feedback and weighting for the second feedback is performed based on linear functions of the applied pressure. Thus, these embodiments provide a gradual transition between the first feedback and the second feedback, which can help the user interpret the feedback and adjust their actions to the correct pressure.

In alternative embodiments, the processing unit is configured to provide feedback by determining a first feedback indicating correct pressure if the applied pressure is within a certain pressure range, determining a second feedback indicating low incorrect pressure if the applied pressure is below a lower pressure threshold, and determining a third feedback indicating a high incorrect pressure if the applied pressure is above an upper pressure threshold. The advantage of these embodiments is that the adjustment required from the user to achieve the correct pressure is more intuitive due to the feedback being different depending on whether the applied pressure is too high or too low.

In these embodiments, the pressure range may further comprise a first boundary region near the lower pressure threshold and a second boundary region near the upper pressure threshold; and the processing unit may be further configured to provide feedback by: (i) determining a first feedback indicating the correct pressure if the applied pressure is within a certain pressure range and outside of the first boundary region and the second boundary region; (ii) determining a second feedback indicating low incorrect pressure if the applied pressure is below a lower pressure threshold and outside the first boundary region; (iii) determining a third feedback indicating a high false pressure if the applied pressure is above an upper pressure threshold and outside the second boundary region; (iv) determining the first intermediate feedback if the applied pressure is within the first boundary region, wherein the first intermediate feedback is a weighted combination of the first feedback and the second feedback, with each weighting for the first feedback and weighting for the second feedback are performed on the basis of linear functions of the applied pressure; and (v) determining a second intermediate feedback if the applied pressure is within the second boundary region, wherein the second intermediate feedback is a weighted combination of the first feedback and the third feedback; wherein each weighting for the first feedback and the weighting for the third feedback are performed based on linear functions of the applied pressure. Thus, these embodiments provide a gradual transition between the first feedback and the second feedback, and between the first feedback and the third feedback, which can further assist the user in interpreting the feedback and adjusting their actions according to the correct pressure.

In some embodiments, the specific feedback is the color of one or more light elements. In alternative embodiments, the feedback component is one or more of the following: one or more light elements, one or more speakers, a display screen, and one or more haptic feedback components.

In some embodiments, the processing unit is further configured to filter the received pressure measurements with a low pass filter and compare the filtered pressure measurements to a specific pressure range to provide feedback. Since the applied pressure/force may change within a fairly short time during a shaving session and/or noise/artifacts may be present in the measured pressure, the advantage of low-pass filtering is that it avoids rapid feedback changes, as this can make it difficult for the user to customize their use of the shaving device in an appropriate manner, and may be distracting to the user. In these embodiments, the implementation of the low-pass filter may have a time constant selected from the range from 0.1 seconds to 0.7 seconds, such as 0.2 seconds.

In some embodiments, the processing unit is further configured to: receive movement measurements representing the movement of the shaving device by the user during a shaving procedure; processing the received movement measurements to determine by the user the type of movement of the shaving device; and determining for the user feedback on the movement related to a certain type of movement; wherein the feedback control signal is further for controlling the feedback component to provide the user with specific motion feedback. Thus, these embodiments provide feedback on both the pressure with which the shaving device is pressed against the skin and the movement of the shaving device.

In some embodiments, the method is further configured to receive an indication of user satisfaction with one or more shaves after one or more shaves; providing the user with an output prompting the user to change the value of one or more parameters if the received indication indicates that the user is not satisfied with one or more shaving operations.

In some embodiments, the feedback component is part of the shaving device. In alternative embodiments, the device is separate from the shaving device.

In some embodiments, the feedback component is part of the shaving device.

These and other aspects will be apparent and explained with reference to the embodiment(s) described below.

BRIEF DESCRIPTION OF THE DRAWINGS

For a better understanding of the invention and a clearer idea of how it can be put into practice, reference will now be made solely by way of example to the accompanying drawings, in which:

in fig. 1 is a block diagram of a shaving system according to various embodiments that includes a shaving device and another device;

in fig. 2 is a flowchart of an exemplary method according to various embodiments;

in fig. 3 shows an exemplary user interface that can be used to enter values for various parameters; and

in fig. 4 is a graph representing the color of the light feedback provided by a light source for various values of applied pressure/force.

IMPLEMENTATION OF THE INVENTION

The methods described herein are applicable to a shaving device that is applied (pressed) against a user's skin and moved across the skin to perform a shaving procedure in which skin hairs are cut off. The shaving device may be any type of shaving device such as a foil shaver or rotary shaver. A rotary razor is a type of shaving device that cuts hair with cutting elements containing one or more rapidly rotating circular blades. Preferably, the inventors have found that the rotary razor should be moved across the skin using a rotational motion such that the razor, for example, follows an approximately circular path on the user's skin. A rotary razor typically comprises at least two cutting elements, and preferably three cutting elements arranged in a triangle, although rotary shavers with other numbers of cutting elements and/or layouts are also available. It has been found that moving the rotary razor in small rotational movements provides improved shaving performance, particularly in terms of reducing skin irritation. However, it is still important that the shaving device (both rotary and foil) be applied to the skin with the correct pressure. Thus, the methods described herein provide feedback on the pressure with which the razor is applied to the user's skin.

In FIG. 1 is a block diagram of a shaving system 2 according to various embodiments, which includes a shaving device 4 and device 6. In these various embodiments, device 6 can be used to determine a pressure range for a user based on values for one or more specific parameters; and to determine the feedback to be provided to the user by comparing the pressure range with measurements of the pressure with which the razor is applied to the skin. As noted below, in various other embodiments, the device 6 may only determine the pressure range, and the shaving device 4 may determine the feedback. Also, as noted below, in various other embodiments, the shaving system 2 may not include a separate device 6, and the functionality of the device 6 described herein may be provided in or with the shaving device 4.

In the illustrated embodiment, the device 6 includes a processing unit 8, a memory unit 10, user interface components 12, and an interface circuit 14. In some embodiments, device 6 is in the form of an electronic device such as a smartphone, tablet, personal digital assistant (PDA), laptop, desktop computer, smart mirror, etc., or it may be a charger or a cradle for shaving device 4.

The processing unit 8 generally controls the operation of the device 6 and may implement one or more of the processing steps provided by the methods described herein. To perform the various functions described below, the processing unit 8 may be implemented in a variety of ways in software and/or hardware. The processing unit 8 may include one or more microprocessors or digital signal processors (DSPs) that can be programmed using software or computer program code to perform the required functions and/or control the components of the processing unit 4 to perform the required functions. The processing unit 8 may be implemented as a combination of specialized equipment for performing some functions (for example, amplifiers, preamplifiers, analog-to-digital converters (ADCs) and/or digital-to-analog converters (DACs)) and a processor (for example, one or more programmable microprocessors, controllers, DSPs, and associated circuitry) to perform other functions. Examples of components that can be used in various embodiments of the present invention include, without limitation, conventional microprocessors, DSPs, application specific integrated circuits (ASICs), and field programmable gate arrays (FPGAs).

The processing unit 8 is connected to a memory unit 10 which can store data, information and/or signals for use by the processing unit 8 in controlling the operation of the device 6 and/or in carrying out or performing the methods described herein. In some implementations, the memory unit 10 stores computer-readable code that can be executed by the processing unit 8 such that the processing unit 8 performs one or more functions, including the methods described herein. In specific implementations, the program code may be in the form of an application for a smart watch, smartphone, tablet, laptop, or computer. The memory unit 10 may comprise any type of non-volatile computer-readable media such as a cache or system memory, including both volatile and non-volatile computer memory such as random access memory (RAM), static RAM (SRAM), dynamic RAM (DRAM). read-only memory (ROM), programmable ROM (PROM), erasable ROM (EPROM), and electrically erasable ROM (EEPROM) implemented as a memory chip, optical disc (e.g., compact disc (CD), digital versatile disc (DVD) or Blu-ray Disc), hard drive, tape storage or solid state device including memory card, solid state drive (SSD), memory card, etc.

User interface components 12 include one or more components that enable a user of device 6 to enter information, values, data, and/or commands into device 6, such as entering values for particular parameter(s) used to determine a pressure range, and/ or allows the device 6 to display information or data to the user of the device 6. The user interface components 12 may comprise any suitable input component(s), including, but not limited to, a keyboard, keypad, one or more buttons, switches or number dials, a mouse, a trackpad, touch screen, stylus, camera, microphone, etc., and user interface components 12 may comprise any suitable output component(s), including but not limited to a display screen, one or more lights or light elements, one or more speakers , one or more haptic feedback components such as a vibrating element, etc.

In the embodiment of the shaving system 2 shown in FIG. 1, since the device 6 is separated from the shaving device 4, the interface circuit 14 in the device 6 allows data to be transferred to and/or from the shaving device 4 and/or data to be transferred to other devices such as a server, a database, etc., and/or from them. The connection may be direct or indirect (for example, over the Internet), and thus the interface circuitry 14 may allow communication between the device 6 and a network such as the Internet, or between the device 6 and the shaver 4, via any desired protocol, wired or wireless connection. For example, interface circuitry 14 may operate using Wi-Fi, Bluetooth, Zigbee, or any cellular protocol (including but not limited to Global System for Mobile Communications (GSM), Universal Mobile Telecommunications System (UMTS), Long Term Evolution (LTE), LTE improvement system, etc.). In the case of a wireless connection, the interface circuitry 14 (and hence the device 6) may comprise one or more suitable antennas for transmitting/receiving over a transmission medium (eg, air). Alternatively, in the case of a wireless connection, interface circuitry 14 may include means (e.g., a connector or plug) to allow interface circuitry 14 to be connected to one or more suitable antennas external to device 6 for transmitting/receiving via a transmission medium (e.g., , air). The interface circuit 14 is connected to the processing unit 8 to enable information or data received by the interface circuit 14 to be transmitted to the processing unit 8 and/or information or data from the processing unit 8 to be transmitted by the interface circuit 14.

The shaving device 4 includes a processing unit 18, a memory unit 20, a pressure sensor 22 and an interface circuit 24. The processing unit 18 generally controls the operation of the shaving device 4 and may implement one or more of the processing steps provided by the methods described herein. The processing unit 18 may be implemented in the device 6 in any of the ways described above with respect to the processing unit 8.

The memory unit 20 is connected to the processing unit 18 and may store data, information and/or signals for use by the processing unit 18 in controlling the operation of the shaving unit 4 and/or in performing or performing the methods described herein. In some implementations, the memory unit 20 stores computer-readable code that can be executed by the processing unit 18 such that the processing unit 18 performs one or more functions, including the methods described herein. The memory unit 20 may be implemented in the device 6 in any of the ways described above with respect to the memory unit 20.

A pressure sensor 22 is provided to measure the pressure or force with which the shaving device 4 is applied or pressed against the user's skin during a shaving procedure. Any suitable type of pressure sensor may be used, such as a piezoelectric pressure sensor. The pressure sensor 22 is typically positioned adjacent to the surface of the shaver 4 that is brought into contact with the skin during a shaving procedure so that the pressure can be measured. For example, the pressure sensor may be placed under the cutting element or partially adjacent to the cutting element. In some embodiments, the shaving device 4 may include a plurality of pressure sensors 22, each of which, for example, is associated with a respective cutting element.

The pressure sensor 22 can measure the pressure in accordance with the sampling frequency and output a time series of pressure measurement values as a pressure measurement signal to the processing unit 18 . The pressure sensor 22 may use any desired sampling rate, such as 50 measurements per second (50 Hz), 64 Hz, 100 Hz, 2 Hz, 4 Hz, etc.

The pressure measurements or the pressure measurement signal may be stored by the processing unit 18 in the memory unit 20 .

The interface circuitry 24 in the shaving device 4 allows a data connection to and/or from the device 6 and/or a data connection to and/or from other devices such as a server, database, etc.. The interface circuit 24 may operate and/or be implemented in any of the ways described above with respect to the interface circuit 14 in the device 6. The interface circuit 24 is coupled to the processing unit 18 to enable the processing unit 18 to be provided with the information or data received by the interface circuit 24, and /or information or data from the processing unit 18 (for example, pressure measurement values or a pressure measurement signal) to be transmitted by the interface circuit 24 .

In order to provide the user with feedback on the pressure applied during the shaving procedure, the shaving system 2 further includes a feedback component that is configured to provide feedback to the user. The feedback component may reside in the device 6, in which case it may be one of the elements in the user interface components 12, as shown in FIG. 1 through the feedback component 26 in the user interface components 12. Alternatively, the feedback component may be located in the shaving device 4, as shown by the feedback component 28, which is connected to the processing unit 18. In both cases, the respective processing unit 8, 18 may issue a feedback control signal to the feedback component 26, 28 in order to control the feedback component 26, 28 to provide the necessary feedback. The feedback may take any suitable or desired form, including one or more of the following: a visual element, an audible element, a touch (tactile) element, etc., and the feedback component 26, 28 may take a form that is able to provide or output these items. The visual element may contain a message in the form of lights, letters, numbers, symbols, pictures, etc., and therefore, the feedback unit 26, 28 may include or be a display screen such as that used in a smartphone, tablet, smart mirror or other personal electronic device. Alternatively (or additionally), the visual element may be provided using one or more lamps (e.g., one or more light emitting diodes (LEDs)) having one or more colors (e.g., red, orange, yellow, green, blue, etc.). .d.). The sound element may include a tone or beep, a verbal message, etc., and therefore the feedback unit 26, 28 may include a speaker to produce the desired sound. The tactile element may include a vibration of a certain intensity and/or duration, and therefore, the feedback unit 26, 28 may contain a component that can generate vibrations, such as a vibration motor. It should be understood that the feedback to be provided may comprise several types of feedback (e.g., visual and audible), and therefore the feedback unit 26, 28 may be configured or able to provide feedback of the appropriate ( corresponding) type(s). In a preferred embodiment, the feedback component 28 in shaving device 4 is a light source that is operated or controlled to emit light of different colors to provide feedback.

It should be understood that in FIG. 1 shows only elements of shaving device 4 and device 6 that are useful in explaining the techniques described herein, but shaving device 4 and device 6 will include other elements that are not shown in FIG. 1. For example, it is understood that both shaving device 4 and shaving device 6 will require a power source such as a rechargeable battery and/or an electrical connection in order to perform the described functions, and shaving device 4 will include one or more cutting elements for cutting hair and a drive for driving the cutting element (elements). The shaving device 4 may also include one or more user interface components that can allow a user to interact with and control the shaving device 4, for example, to activate or deactivate the cutting element(s) on the shaving device 4 and/or to control one or more settings or operations of the shaving unit 4. User interface components on the shaving unit 4 may provide the user with information about the shaving unit 4, such as battery charge status, etc. In additional embodiments, shaving device 4 may include a motion sensor, such as an accelerometer, for measuring movement or movement of shaving device 4 during use by a user. The motion sensor measurements can be used to provide a user with feedback on the movement of the shaving device 4 during a shaving procedure using the techniques described in WO 2018/206805.

As noted above, the methods described herein provide feedback on the pressure with which the razor is applied to the user's skin. It is generally possible to determine the range of pressure within which a typical user must press the shaving device 4 against their skin in order to achieve an acceptable shaving result. However, this "general" pressure range will not be suitable for every user, as users may differ in their desired shave (e.g. some users may want to shave as close as possible while others prefer to keep the stubble at some level), users may different understandings of what a “good” shave is and may differ in the degree of skin irritation resulting from shaving. Therefore, it has been found that it is not possible to determine a general pressure range that is suitable for all users and their expected results. Therefore, the methods presented herein allow the pressure range to be personalized for a particular user based on the values of one or more parameters related to their shaving. To do this, the pressure during the shaving procedure is measured and compared with a pressure range set by the user, with applied pressure feedback based on the result of this comparison.

In FIG. 2 shows a method for providing feedback to a user of a shaving device 4 during a shaving procedure in accordance with an aspect of the techniques described herein. Any of the steps of the method may be performed by the processing unit 8 in the device 6 or the processing unit 18 in the shaving unit 4 in combination with any of the following: pressure sensor 22, memory unit 10, memory unit 20, interface circuit 14, interface circuit 24, user interface components 12 interface and/or feedback component 26, 28, as appropriate. Any processing unit 8, 18 may perform one or more steps in response to execution of computer program code, which may be stored on a computer-readable medium such as, for example, memory unit 10 and memory unit 20, respectively.

At step 101, the values of one or more parameters are determined for the user. The one or more parameters include at least one of a shaving frequency score, a skin irritation score, a closeness score, and an indication of whether the shaving device 4 is used on wet or dry skin during a shaving procedure. In some embodiments, values for two or more parameters are determined in step 101. In some embodiments, values for all four of the listed parameters are determined in step 101.

The Shaving Frequency Value indicates how often the user shaves using the shaving unit 4. Possible values for the Shaving Frequency Value may include "every day", "every 2 days", "once a week", etc. In some embodiments, the shaving frequency value is determined at step 101 by receiving input from the user through the user interface components 12 in the device 6 indicating the shaving frequency, or by retrieving a value previously entered by the user from the memory unit 10 or memory unit 20. Alternatively, the frequency of shaving may be determined automatically by analyzing usage information indicating how often the shaving device 4 is used to perform a shaving procedure. In this case, the value of the shaving frequency index can be determined based on the usage information collected by the shaving unit 4.

The Skin Irritation Score is indicative of skin irritation experienced by the user during and/or after shaving with the razor head 4. Possible values for the Skin Irritation Score can range from "no irritation" to "severe irritation" and so on. or skin irritation may be expressed as a numerical value. In some embodiments, the skin irritation score is determined at step 101 by receiving input from the user through the user interface components 12 in the device 6 indicating skin irritation, or by retrieving a value previously entered by the user from memory 10 or memory 20. Alternatively, skin irritation can be determined from measurements of the skin after a previous shave. For example, an image or measurement signal may be obtained from the skin after a shaving procedure, and the image or measurement signal may be analyzed using methods known in the art to determine the amount of irritation, as indicated by, for example, the amount of reddening of the skin (or the amount redness of the skin after shaving compared to before shaving). In this case, the skin irritation index value may be dynamically determined in step 101 by analyzing the skin image or measurement signal, or by retrieving a previously determined skin irritation value from a memory, such as memory unit 10 or memory unit 20 .

The Shave Proximity Value indicates how short the user's desired hair should be after shaving using the shaving device 4. Possible values for the Shave Proximity Value may be "very close", "close", or "standard", etc. In some embodiments, the shaving proximity value is determined at step 101 by receiving input from the user via the user interface components 12 in the device 6 indicating the desired shaving proximity, or by retrieving a value previously entered by the user from the memory 10 or memory 20.

An indication of whether the shaving device 4 is used on wet or dry skin during the shaving procedure may have possible meanings such as "wet", "dry", and "both". In some embodiments, a value relating to whether the shaving device 4 is used on wet or dry skin is determined at step 101 by receiving input from the user via the user interface components 12 in the device 6 or by extracting a value previously entered by the user from block 10 memory or block 20 memory. Alternatively, this can be determined based on the moisture sensor measurements taken during the previous shave, assuming that the next shave will be performed under similar conditions. In this case, the value of whether the shaving device 4 will be used on wet or dry skin can be dynamically determined in step 101 by analyzing the measurements obtained by the humidity sensor when using the shaving device 4 in the previous period, or by retrieving a previously determined indication from memory, for example block 10 memory or block 20 memory. The moisture sensor measures the moisture on the skin and/or shaving device 4 during the shaving procedure.

It should be understood that the values determined in step 101 may refer to previous shaves performed by the user (in particular, skin irritation score and shave frequency score), or they may refer to next or future shaves performed by the user (in particular , the closeness of the shave and whether it will be a wet or dry shave).

In FIG. 3 shows an exemplary user interface 40 that may be displayed on the display screen of device 6 that allows the user to enter values for each of the four parameters defined above. Thus, there is a user interface (UI) input element for each of the following: a shave frequency score (UI element 42), a skin irritation score (UI element 44), a shave proximity score (UI element 46), and whether the shaving operation is performed on wet or dry skin (PI element 48). In this example, each UI element 42, 44, 46, 48 is a slider, with the value of each parameter entered by the user by moving the slider along the slide bar to the appropriate value. Those skilled in the art will appreciate that other UI elements may be used in the user interface 40. For example, any of the UI elements 42, 44, 46, 48 could be a drop-down list, a list of possible values, a set of radial buttons associated with corresponding values, a free text entry field, and so on.

At step 103, a pressure range for the user is determined based on the values of one or more parameters determined at step 101. The pressure range is a personalized pressure range that the user can use in the next shaving procedure. The pressure range is between the upper and lower pressure thresholds. The exemplary user interface 40 shown in FIG. 3 also includes a PI element 50 representing a specific pressure range. Element 50 PI is a scale that includes a range of pressure in the form of a bar 52 on the scale between the lower threshold 54 pressure and the upper threshold 56 pressure. In this example, the scale is in units of force (newton, N), since the area of the surface to which the force is applied is constant. Also in this example, the pressure range 52 shown is 0.9 to 2.1 N.

In some embodiments, the values of a particular parameter may change or set one or more of the lower pressure threshold values, the upper threshold values, or the size or width of the pressure band (ie, the magnitude of the difference between the upper pressure threshold and the lower pressure threshold).

Additional details of step 103 are provided below.

After the pressure value range is determined in step 103, pressure measurement values representing the pressure with which the shaving device 4 is applied to the user's skin are received in step 105 (step 105). In order to provide the user with real-time or near-real-time feedback (ie, fast enough that the user can use the feedback to correct their current shaving actions), pressure measurements are received during the shaving procedure. Thus, in step 105, the pressure measurement results obtained by the pressure sensor 22 are received by the processing unit 8 or the processing unit 18 (as appropriate, depending on which processing unit performs the subsequent steps of the method).

Then, at step 107, the obtained pressure measurement results are compared with the pressure range determined at step 103 to determine feedback to the user regarding the applied pressure.

In some embodiments, if it is determined in step 107 that the applied pressure is within a predetermined pressure range (i.e., the applied pressure is above a lower pressure threshold and below an upper pressure threshold), then in this case, step 107 may include determining a first feedback , which is an indication of the correct pressure. For example, the first feedback may be a green light, a check mark, an indicator of applied pressure in a graphical representation of the pressure range, a specific sound, an audible message, or any other type of feedback that conveys, or may be understood to convey, positive feedback to the user. If it is determined that the applied pressure is not within the predetermined pressure range (i.e., the applied pressure is below the lower pressure threshold or above the upper pressure threshold), then step 107 may include determining a second feedback indicative of incorrect pressure. For example, the second feedback may be a red light, a cross, an applied pressure indicator on a pressure range graphic, a specific sound, an audible message, or any other type of feedback that conveys, or may be understood to convey, negative feedback to the user.

In order to improve the advice given to the user on the correct pressure to use, instead of providing one type of feedback in case the applied pressure is not correct as in the above embodiments, other negative feedback may be provided in alternative embodiments depending on whether the applied pressure is below a certain pressure range (ie, below a lower pressure threshold) or above a certain pressure range (ie, above an upper pressure threshold). In these embodiments, if the applied pressure is within a certain pressure range, the first feedback may be determined as described above. If the applied pressure is below a certain pressure range, a second feedback may be determined that indicates a low incorrect pressure. For example, the second feedback may be a blue light, an arrow pointing down, an indicator of applied pressure on a graphical representation of the pressure range, a specific sound, an audible message, or any other type of feedback that conveys, or may be understood to convey to the user, feedback about that the applied pressure is too low. When the applied pressure is above a certain pressure range, a third feedback can be determined that indicates a high abnormal pressure. For example, the second feedback may be a red light, an upward pointing arrow, an indicator of applied pressure on a graphical representation of the pressure range, a specific sound, an audible message, or any other type of feedback that conveys feedback, or may be understood as giving feedback to the user, indicating that the applied pressure is too high.

Finally, at step 109, the processing unit 8, 18 generates and transmits a feedback control signal to the feedback component 26, 28. The feedback control signal is generated such that it controls the feedback component 26, 28 to provide the user with specific feedback. For example, if the applied pressure is within the set pressure range, the feedback control signal may control the feedback light component 26, 28 to generate green light.

In some embodiments, the implementation of the method may further include the step of generating certain feedback using the component 26, 28 feedback in response to the feedback control signal.

In additional embodiments, as noted above, the method may further include providing feedback on the movement of the shaving device 4 during the shaving procedure. Therefore, during a shaving procedure, movement measurements that represent the movement of the shaving device 4 by the user can be obtained, and the resulting movement measurements can be processed to determine the type of movement of the shaving device 4 by the user (e.g., linear movement, large circle movement, small circle movement, etc.). .d.), and then the motion feedback related to the particular type of motion can be defined. In these embodiments, the feedback control signal is defined such that it controls the feedback component 26, 28 to provide the user with specific motion feedback in addition to pressure feedback.

In some embodiments, after the user has completed one or more shaves (eg, over several days), the user may enter a measure of their satisfaction with the one or more shaves. For example, the user may enter data indicating whether the user experiences mild or severe skin irritation, whether the closeness of the shave is desired, or, more generally, whether the user is satisfied with the shaving operation or shaving device 4. If the resulting readings indicate that the user is not satisfied with the shaving operations or shaving device 4, then the user may be provided with an output to indicate that the value of one or more of the parameters determined in step 101 should be changed (and in some cases, the output may provide a proposed change, for example, more frequent/rare shaving, wet/dry shaving, etc.). Thus, the user may be prompted to change their behavior (in the form of input in step 101) to increase their satisfaction with the shaving device 4 or the shaving operation.

At step 103, the lower pressure threshold may depend on the value of the shaving frequency index. Generally, the more frequently a user shaves, the lower the lower pressure threshold. Thus, in the embodiments of step 103, the lower pressure threshold may be set to a first lower pressure threshold when the shave frequency value has the first shave frequency value, and the lower pressure threshold may be set to the second lower pressure threshold when the shave frequency value has second value for shaving frequency. The first shaving frequency value represents more frequent shaving than the second shaving frequency value (eg, every day or once a week), and the first lower pressure threshold is lower than the second lower pressure threshold.

In step 103, the upper pressure threshold and/or the lower pressure threshold may be dependent on the skin irritation score value. In general, the higher the skin irritation, the lower the upper pressure threshold and the lower the lower pressure threshold, since skin irritation may be caused or exacerbated by pressing the shaving device 4 too hard against the skin. Thus, in embodiments of step 103, the upper pressure threshold may be set to the first upper pressure threshold when the skin irritation score is at the first skin irritation value, and the upper pressure threshold may be set at the second upper pressure threshold when the skin irritation score is the second meaning is skin irritation. The first skin irritation value represents more skin irritation than the second skin irritation value, and the first upper pressure threshold is lower than the second upper pressure threshold. Alternatively or additionally, in embodiments of step 103, the lower pressure threshold may be set to a first lower pressure threshold when the skin irritation score has a first skin irritation value, and the lower pressure threshold may be set to a second lower pressure threshold when the measure skin irritation has the second meaning of skin irritation. Again, the first skin irritation value represents more skin irritation than the second skin irritation value, and the first lower pressure threshold is lower than the second lower pressure threshold.

At step 103, the upper pressure threshold and/or the lower pressure threshold may be dependent on the Shave Proximity Index value. In general, the closer the shave should be (ie, the shorter the hair after shaving), the higher the upper pressure threshold and/or the lower pressure threshold should be. Thus, in embodiments of step 103, the upper pressure threshold may be set to the first upper pressure threshold when the closeness value is at the first closeness value, and the upper pressure threshold may be the second upper pressure threshold when the closeness value is at the second value. shaving proximity. The first shaving proximity value represents a closer shave than the second shaving proximity value, and the first upper pressure threshold value is higher than the second upper pressure threshold value. Alternatively or additionally, in embodiments of step 103, the lower pressure threshold may be set to a first lower pressure threshold when the closeness value is at the first closeness value, and the lower pressure threshold may be a second lower pressure threshold when the closeness value is has a second shaving proximity value. Again, the first closeness value represents a closer shave than the second closeness value, and the first lower pressure threshold is higher than the second lower pressure threshold.

At step 103, the upper pressure threshold and/or the lower pressure threshold may depend on whether the shaving device 4 is used on wet or dry skin during the shaving procedure. In general, the pressure should be lower if the shaving unit 4 is used on wet skin than on dry skin (i.e., the upper pressure threshold and/or the lower pressure threshold should be lower for use on wet skin compared to use on dry skin). ). Thus, in embodiments of step 103, the upper pressure threshold may be set to the first upper pressure threshold when the shaving apparatus 4 is used on dry skin, and the upper pressure threshold may be set to the second upper pressure threshold when the shaving apparatus 4 is applied on dry skin. wet skin. In this case, the first upper pressure threshold is higher than the second upper pressure threshold. Alternatively or additionally, in embodiments of step 103, the lower pressure threshold may be set to the first lower pressure threshold when the shaving device 4 is used on dry skin, and the lower pressure threshold may be set to the second lower pressure threshold when the shaving device 4 is used on wet skin. In this case, the first lower pressure threshold is higher than the second lower pressure threshold.

It should be appreciated that in embodiments where one or more of the parameters includes a plurality of shave frequency, shave closeness, skin irritation, and whether the shaver 4 is used on wet or dry skin, the values of each of the parameters may affect the value of the upper pressure threshold and/or lower pressure threshold. For example, the lower pressure threshold and the upper pressure threshold may differ from the minimum possible values when the Shave Frequency score indicates "every day", the Skin Irritation Frequency score indicates "Severe irritation", the Shave Closeness score indicates "Normal" or "Less close", and the shaving unit 4 is used on wet skin to the highest possible values, when the shaving frequency index indicates "once a week", the skin irritation index indicates "no irritation", the shaving proximity index indicates "very close", and the shaving unit 4 is used dry skin.

Table 1 shows an exemplary setting of the lower pressure threshold, the upper pressure threshold, and the pressure range (i.e., the difference between the lower pressure threshold and the upper pressure threshold).

Table 1

individual differences Value range MaxΔ if value = MIN MaxΔ if value = MAX ° min Max reference ∆L1 ΔH1 ΔL2 ΔH2 Shaving frequency (days between shaves) one 7 2 0.1 Skin irritation score (1=no irritation, 5=high irritation) one five 3 0.5 -0.5 -1.0 Shave proximity value (1 = normal,
3 = very close) one 3 2 -0.5 0.5 0.5 Shaving device is used on dry skin (1), wet skin (3) or both types (2) one 3 one -0.1 -0.1 -0.2 -0.2

Table 1 shows the range of values for each of the four parameters and the reference value (Reference) for each parameter, where the reference value is the nominal value or the default value for the parameter (for example, the nominal value for the shaving frequency value is "shaves every 2 days" , the skin irritation rating is "moderate irritation", the smoothness rating is "moderately close", and the wet/dry rating is "dry"). The column "Max if Δ = Min" contains the corresponding correction factors for the nominal values of the lower threshold (ΔL1) pressure and the upper threshold (ΔH1) pressure when the parameter value is below the set value. The column "Max if Δ = Min" also contains the corresponding correction factors for the nominal values of the lower threshold (ΔL2) pressure and the upper threshold (ΔH2) pressure, if the parameter value is below the set value. Correction factors for pressure thresholds are expressed in newtons, N. The lower pressure threshold may have a default value to which the settings in Table 1 apply. For example, the default value may be 1.5 N. The upper pressure threshold may have a value default to which the settings in Table 1 apply. For example, the default value might be 3.0 N.

Equations (1) and (2) are exemplary formulas for use in step 103 to determine lower pressure threshold and upper pressure threshold values, respectively. In these equations, the shaving frequency value is represented by Days (w) ∈ {1,2,3,4,5,6,7}, the skin irritation value is represented by Irritation (x) ∈ {1, 2, 3, 4, 5} , the shaving closeness index value is represented by Proximity (y) ∈ {1,2,3}, and the use value of the shaver 4 on wet or dry skin is given by DCW (z) ∈ {1,2,3}. The default value for the lower pressure threshold is labeled Nominal L and the default value for the upper pressure threshold is labeled Nominal H . Thus, the lower pressure threshold (denoted as Low pressure ) can be set as follows:

(1)

(one)

(2)

(2)

where * reference represents the reference value for the parameter * specified in Table 1, and ΔL1 *, ΔL2 *, ΔH1 * and ΔH2 * represent the correction for the lower pressure threshold or the upper pressure threshold depending on the value of the parameter *.

As noted above, in some embodiments of step 107, various feedback may be determined for the user, the feedback being determined directly based on a comparison of the applied pressure/force with an upper pressure threshold and a lower pressure threshold. For example, the feedback may be blue if the applied pressure/force is above the lower pressure threshold and below the upper pressure threshold, and the feedback may be red if the applied pressure/force is above the upper pressure threshold. As a result, in these embodiments, there may be abrupt changes in the feedback provided (eg, switching between red and green) when the user uses the shaving device 4 as the applied natural pressure changes during the shaving procedure. Therefore, in some embodiments, a boundary region may be defined around one or both of the lower pressure threshold and the upper pressure threshold, and the feedback to be provided if the applied pressure/force is in one of these boundary regions is a combination of feedback for ambient pressure range. For example, for a boundary region near the lower pressure threshold, when the applied pressure/force is in the boundary region, the established feedback may be a combination of blue light and green light.

In some embodiments, when the applied pressure/force is in the boundary region, the feedback is defined as a function of the applied pressure/force, such as a linear combination of the feedbacks of the surrounding areas. This is illustrated in FIG. 4 which shows a graph representing the color of the light feedback provided by the light source for various values of applied pressure/force. A lower pressure threshold 60 and an upper pressure threshold 62 are shown, as well as a first boundary region 64 centered on the lower pressure threshold 60 and a second boundary region 66 centered on the upper pressure threshold 62. The solid line 68 represents the green intensity and it can be seen that the feedback is only green 68 if the applied pressure/force is between the lower pressure threshold 60 and the upper pressure threshold 62, and in particular between the first boundary region 64 and the second boundary region 66. The dotted line 70 represents the red light intensity, and it can be seen that the feedback is only red light 70 if when the applied pressure/force is above the upper pressure threshold 62 and in particular above the second boundary region 66. However, when the applied pressure/force is in the second boundary region 66, the feedback includes both the green light 68 and the red light 70. In the illustrated embodiment, the feedback is determined if the applied pressure/force in the second boundary region 66 is a linear combination of the intensities of the green light 68 and red light 70, so that there is a gradual transition feedback color code through the second boundary region 66. It is understood that the linear combination may be a weighted combination of green light 68 and red light 70 intensities, with weighting for green light intensity 68 and weighting for red light intensity 70, each of which is determined based on a linear a function of the applied pressure/force, i.e. based on a linear relationship between the corresponding light intensity and the applied pressure/force.

The dashed line 72 represents the blue light intensity and it can be seen that the feedback is only blue light 72 if the applied pressure/force is below the lower pressure threshold 64 and in particular below the first boundary region 64. However, if the applied pressure/force is in the first boundary region 64, the feedback includes both blue light 72 and green light 68. In the illustrated embodiment, the feedback determined when the applied pressure/force is in the first boundary region 64 is a linear combination of blue light intensities 72 and green light 68, so that the feedback color gradually transitions through the first boundary region 64. It will be understood that the linear combination may be a weighted combination of blue light intensity 72 and green light 68, green light intensity weighting 68 and blue light intensity weighting 72 determined on the basis of a linear function of the applied pressure ion/force, i.e. based on a linear relationship between the corresponding light intensity and the applied pressure/force.

It should be appreciated that the boundary regions described above can also be applied to embodiments where the feedback is the same (e.g. red light) whether the applied pressure/force is below the lower pressure threshold 60 or above the upper pressure threshold 62 pressure. In other words, when the applied pressure/force is in the first boundary region 64 or the second boundary region 66, the feedback may be a combination of red light and green light.

Although in FIG. 4 shows the boundary regions 64, 66 with regard to the feedback in terms of the color of the emitted light, it should be understood that the use of the boundary regions 64, 66 and the combination of different feedbacks when the applied pressure/force is in the boundary region 64, 66 can be applied to other types of feedback, such as different colors and/or light intensities, sounds, vibrations, etc.

In FIG. 4 also shows a second lower pressure threshold 74. This second lower pressure threshold 74 may be used as a shutdown threshold below which no feedback is provided to the user. In particular, during a shaving procedure, when the shaving device 4 is lifted from the skin and moved to another location on the skin, the applied pressure/force will fall below the lower pressure threshold 60, but at these pressures/forces, it is not necessary to tell the user that the pressure is too low. . Therefore, the second lower pressure threshold 74 may be a shutdown threshold below which no feedback is determined for the user at step 107. For example, if the applied pressure/force is below the second lower pressure threshold 74, no light may be emitted.

In FIG. 4 also shows a third boundary region 76 which is centered on the second lower pressure threshold 74 and which can be used similarly to the first and second boundary regions 64, 66 as described above. That is, the feedback provided to the user may be a function of the applied pressure/force, with the effect that the feedback provided if the applied pressure/force is below the lower pressure threshold 60 and below the first boundary region 64 is linearly reduced within third boundary region 76 as the applied pressure/force decreases.

In any of the aforementioned embodiments, step 107 may include comparing raw (ie, raw) pressure measurement values with a specific pressure range. Alternatively, given that applied pressure/force may change over fairly short periods of time during a shave and/or noise/artifacts may be present in the measured pressure, it is desirable to avoid rapid feedback changes (e.g. flashing between red and green) as this may make it difficult for the user to properly adapt the use of the shaving device 4 and/or may be distracting to the user. Therefore, in some embodiments, the obtained pressure measurements may be filtered with a low pass filter to smooth out noise/artifacts or other transient changes in the measured pressure. The filtered pressure measurements can then be compared to the pressure range determined in step 107. In some embodiments, the low pass filter is a first order low pass filter. In some embodiments, the implementation of the low pass filter has a time constant in the range from 0.1 seconds to 0.7 seconds. For example, the time constant may be 0.2 seconds. It should be understood that the time constant should not be too small (e.g., less than 0.1 second or less than 0.2 second), as this may result in a rapid change or alternation of the feedback, which may distract the user or create embarrassment or interference for the user. when properly adapting their use of the shaving device 4. It should also be understood that the time constant should not be too large (for example, more than 0.7 seconds or more than 0.63 seconds), as then it will be difficult for the user to relate feedback to their own actions when using the shaving device 4 due to the delay between the corresponding movement and the feedback.

Thus, methods are provided that determine and provide appropriate feedback regarding the pressure with which the shaving device 4 is applied to the skin.

Other variations of the disclosed embodiments may be understood and carried out by those skilled in the art in the practice of the claimed invention based on a study of the drawings, description and appended claims. In the claims, the word "comprising" does not exclude other elements or steps, and the grammatical form of the singular does not exclude the presence of a plurality. One processor or other module can perform the functions of several elements listed in the claims. The mere fact that certain measures are set forth in mutually distinct different claims does not mean that a combination of these measures cannot be used effectively. The computer program may be stored or distributed on a suitable medium, such as an optical storage medium or solid state media supplied with or as part of other equipment, but may also be distributed in other forms, such as over the Internet or other wired or wireless telecommunication systems. No reference positions in the claims should be construed as limiting the scope of the invention.

Claims (39)

1. A method for providing feedback to a user of a shaving device during a shaving procedure, implemented by a computer and including: determining values for one or more parameters, where one or more parameters includes at least one of the following: (i) a shaving frequency indicator indicating how often a user performs a shaving procedure using a shaving device, (ii) a skin irritation score indicative of skin irritation experienced by the user during and/or after shaving with the razor, (iii) a closeness index indicating how short the hair should be at the request of the user after being shaved with the razor, and (iv) whether the shaver is used on wet or dry skin during the shaving procedure; determining for the user a pressure range based on determined values for one or more parameters, wherein the pressure range has an upper pressure threshold and a lower pressure threshold; receiving pressure measurement values representing the pressure with which the shaving device is applied to the user's skin during a shaving procedure using the shaving device; comparing the received pressure measurement values with the determined pressure range to determine feedback to the user regarding applied pressures given the determined pressure range; and outputting a feedback control signal to a feedback component associated with the shaving device, wherein the feedback control signal is for controlling the feedback component to provide a certain feedback to the user. 2. The method of claim 1, wherein the one or more parameters comprise at least a shave frequency value, and the step of determining the pressure range includes setting the lower pressure threshold to a first lower pressure threshold when the shave frequency value is at the first shave frequency value , and setting the lower pressure threshold to a second lower pressure threshold when the shaving frequency value has a second shaving frequency value, wherein the first shaving frequency value represents more frequent shaving than the second shaving frequency value, and the first lower pressure threshold value is lower than the second lower threshold value. pressure values. 3. The method of claim 1 or 2, wherein the one or more parameters comprise at least a skin irritation score, and the step of determining the pressure range includes setting an upper pressure threshold to a first upper pressure threshold when the skin irritation score is at a first value. of skin irritation, and setting the upper pressure threshold to a second upper pressure threshold when the skin irritation score has a second skin irritation value, wherein the first skin irritation value represents a greater skin irritation than the second skin irritation value, and the first upper pressure threshold is lower than the second upper pressure threshold. 4. The method according to any one of paragraphs. 1-3, wherein the one or more parameters comprise at least a shave proximity value, and the step of determining a pressure range includes setting an upper pressure threshold to a first upper pressure threshold when the shave proximity value has a first shave proximity value, and setting an upper pressure threshold to a second upper pressure threshold when the closeness index has a second closeness value, wherein the first closeness value represents a closer shave than the second upper closeness threshold and the first upper pressure threshold is higher than the second upper pressure threshold . 5. The method according to any one of paragraphs. 1-4, wherein one or more of the parameters comprises at least determining whether the shaving device is used on wet or dry skin during the shaving procedure, and the step of determining the pressure range includes setting the upper pressure threshold to the first upper pressure threshold, when the shaving device is used on dry skin, and setting the upper pressure threshold to the second upper pressure threshold, when the shaving device is used on wet skin, wherein the first upper pressure threshold is higher than the second upper pressure threshold. 6. The method according to any one of paragraphs. 1-5, wherein the step of determining the feedback includes determining a first feedback indicating the correct pressure if the applied pressure is within a certain pressure range and determining a second feedback indicating an incorrect pressure if the applied pressure is outside the determined pressure range. 7. The method of claim 6, wherein the step of determining feedback includes determining a first feedback indicating correct pressure if the applied pressure is within a certain pressure range, determining a second feedback indicating low incorrect pressure if the applied pressure is below a lower threshold. pressure, and determining a third feedback indicating a high incorrect pressure if the applied pressure is above an upper pressure threshold. 8. The method according to p. 7, in which the pressure range further comprises a first boundary region near the lower pressure threshold and a second boundary region near the upper pressure threshold; and while the stage of determining the feedback includes: (i) determining a first feedback indicating the correct pressure if the applied pressure is within a certain pressure range and outside the first boundary region and the second boundary region; (ii) determining a second feedback indicating low incorrect pressure if the applied pressure is below a lower pressure threshold and outside the first boundary region; (iii) determining a third feedback indicating a high false pressure if the applied pressure is above an upper pressure threshold and outside the second boundary region; (iv) determining the first intermediate feedback if the applied pressure is within the first boundary region, wherein the first intermediate feedback is a weighted combination of the first feedback and the second feedback, wherein the weighting for the first feedback and the weighting for the second feedback are performed based on linear functions of applied pressure; and (v) determining a second intermediate feedback if the applied pressure is within the second boundary region, wherein the second intermediate feedback is a weighted combination of the first feedback and the third feedback; wherein the weighting for the first feedback and the weighting for the third feedback are performed based on linear functions of the applied pressure. 9. The method according to any one of paragraphs. 1-8, wherein the comparison step includes filtering the received pressure measurement values with a low pass filter and comparing the filtered pressure measurement values to a specific pressure range to determine feedback. 10. A computer-readable medium containing a computer program product and having a computer-readable code implemented therein, the computer-readable code being configured such that its execution by a computer or processing unit causes said computer or processing unit to execute the method according to any one of paragraphs. 1-9. 11. Device for providing feedback to the user of the shaving device during the shaving procedure for implementing the method according to any one of paragraphs. 1-9, containing a processing unit, which is configured to: defining values for one or more parameters, wherein one or more parameters contains at least one of the following: (i) a shaving frequency indicator indicating how often a user performs a shaving procedure using a shaving device, (ii) a skin irritation score indicative of skin irritation experienced by the user during and/or after shaving with the razor, (iii) a closeness index indicating how short the hair should be at the request of the user after being shaved with the razor, and (iv) whether the shaver is used on wet or dry skin during the shaving procedure; determining a pressure range for the user based on determined values for one or more parameters, wherein the pressure range has an upper pressure threshold and a lower pressure threshold; receiving pressure measurement values representing the pressure with which the shaving device is applied to the user's skin during a shaving procedure using the shaving device; comparing the received pressure measurement values with the determined pressure range to determine feedback to the user regarding applied pressures given the determined pressure range; and outputting a feedback control signal to a feedback component associated with the shaving device, wherein the feedback control signal is for controlling the feedback component to provide the user with specific feedback. 12. The apparatus of claim. 11, in which the processing unit is configured to determine the feedback by determining the first feedback indicating the correct pressure, if the applied pressure is within a certain pressure range, determining the second feedback indicating low incorrect pressure, if the applied the pressure is below the lower pressure threshold, and determining a third feedback indicating a high incorrect pressure if the applied pressure is above the upper pressure threshold. 13. The apparatus of claim 11 or 12, wherein the processing unit is configured to filter the received pressure measurement values with a low pass filter and compare the filtered pressure measurement values to a specific pressure range to determine feedback. 14. The device according to any one of paragraphs. 11-13, in which the specified device is made as part of a shaving device. 15. The device according to any one of paragraphs. 11-13, wherein said device is separate from the shaving device.

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