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CN-115916045-B - Method for determining scalp type of user

CN115916045BCN 115916045 BCN115916045 BCN 115916045BCN-115916045-B

Abstract

A method (10) for determining a scalp (21) type of a user (20), the method (10) comprising obtaining a value indicative of a humidity level (111) of an area of the scalp (21) of the user (20) and a value indicative of a sebum level (112) in the area of the scalp (21) of the user (20), comparing a set comprising these two values with a reference range of scalp humidity levels (111) and sebum levels (112), the reference range forming at least five scalp sets (131-135), each scalp set (131-135) being associated with a humidity level (111) range and a sebum level (112) range, and also being associated with a skin and/or hair care composition and/or skin and/or hair care treatment compatible with a sebum level (112) range of a corresponding category, identifying a scalp (21) type of the user (20) based on the comparison, and outputting the identified scalp (21) type.

Inventors

  • SHI YI
  • CHANG XIAOWEI

Assignees

  • 汉高股份有限及两合公司

Dates

Publication Date
20260505
Application Date
20200630

Claims (13)

  1. 1. A method (10) for determining a scalp type of a user (20), the method comprising: obtaining a value indicative of a humidity level (111) of an area of the user's scalp (21); Obtaining a value indicative of sebum level (112) in the region of the scalp of the user; Comparing the obtained set comprising the value indicative of the humidity level and the value indicative of the sebum level with a reference range of scalp hydration levels and sebum levels, the reference range forming at least five scalp sets, each scalp set being associated with a humidity level range and a sebum level range, each scalp set also being associated with a corresponding category of skin care composition and/or hair care composition and/or skin care treatment and/or hair care treatment, the corresponding category of skin care composition and/or hair care composition and/or skin care treatment and/or hair care treatment being compatible with the humidity level range and sebum level range; identifying scalp types of the user in the at least five scalp groups based on the comparison, and The identified scalp type is output and, Wherein the at least five scalp groups comprise: A first scalp set corresponding to a hydration level of upper skin conductivity measurable between 0 μs and 40 μs and a reduced translucency sebum level of sebum absorbing band film measurable between 0 and 20% in contact with the scalp of the user; A second scalp group corresponding to a hydration level of upper skin conductivity measurable between 0 μs and 80 μs and a reduced translucency sebum level of sebum absorbing band film measurable between 20 and 60% in contact with the scalp of the user; A third scalp group corresponding to a hydration level of upper skin conductivity measurable between 0 μs and 80 μs and a reduced translucency sebum level of sebum absorbing band film measurable between 60 and 100% in contact with the scalp of the user; A fourth scalp group corresponding to a hydration level of upper skin conductivity measurable between 40 μs and 80 μs and a reduced translucency sebum level of sebum absorbing band film measurable between 0 and 40% in contact with the scalp of the user; a fifth scalp group corresponding to a hydration level of the upper layer skin conductivity measurable as 80 μs or more and a sebum level of reduced translucence of the sebum absorbing band film measurable as 0 to 60% in contact with the scalp of the user.
  2. 2. The method of claim 1, wherein the at least five scalp groups are established based on data extracted from the scalp of at least one hundred users using at least one of: measuring biophysical parameter values of the scalp, the biophysical parameter values including a hydration level value and a sebum level value for each scalp; Analysis of scalp features on enlarged photographs (430) of the scalp of the at least one hundred users.
  3. 3. The method of claim 1 or 2, wherein the value indicative of the humidity level of the region of the user's scalp and the value indicative of the sebum level of the region of the user's scalp are obtained using at least one of: Measuring a biophysical parameter value of the region of the scalp of the user, the biophysical parameter value comprising a hydration level value and a sebum level value of the region of the scalp of the user; analysis of scalp features on an enlarged photograph of the area of the user's scalp.
  4. 4. The method of claim 2, wherein the measurement of the biophysical parameter value of the scalp comprises a conductivity measurement or a resistance measurement on an upper layer of the scalp to obtain a hydration level value and a measurement of the translucence change of a sebum absorbing band film in contact with the scalp to obtain a sebum level.
  5. 5. The method of claim 2, wherein the feature on the enlarged photograph comprises at least one of: The intensity of light reflected by the region of the scalp; A count of dandruff (433) on said magnified photograph; A count of red portions (432) on the magnified photograph, the red portions being indicative of inflammation on the scalp, and The amount of fluorescence emitted from the hair follicles of the scalp, Wherein each scalp is photographed under natural light, ultraviolet light and polarized light conditions.
  6. 6. The method as recited in claim 2, further comprising: the at least five scalp groups are defined based on visual assessments of dryness and oiliness of the scalp of the at least one hundred users, the visual assessments corresponding to assessments of similarity of the skin and/or hair care compositions and/or skin and/or hair care treatments suitable for the scalp groups for each of the at least five scalp groups.
  7. 7. The method of claim 1 or 2, wherein the reference range is established based on data extracted from the scalp of at least one hundred users, the method further comprising, for each of the at least one hundred users: obtaining magnified photographs of the scalp of the at least one hundred users; Grouping the obtained magnified photographs according to the defined at least five scalp groups; for each of the at least five scalp groups, a combination of features found within the grouped magnified photographs of the scalp belonging to the scalp group is determined.
  8. 8. The method according to claim 1, wherein: the first scalp group is associated with a corresponding class of skin and/or hair care compositions comprising 10 to 18% surfactant and having a zein value of less than 0.75; The second scalp group is associated with a corresponding class of skin and/or hair care compositions comprising 12 to 20% surfactant and having a zein value of less than 1; The third scalp group is associated with a corresponding class of skin and/or hair care compositions comprising 14 to 20% surfactant and having a zein value of less than 2.5; the fourth scalp group being associated with a corresponding class of skin and/or hair care compositions comprising from 10 to 18% of surfactant and having a zein value of less than 2, and The fifth scalp group is associated with a corresponding class of skin and/or hair care compositions comprising 10 to 18% surfactant and having a zein value of less than 1.5.
  9. 9. The method according to claim 1, wherein: The first scalp group is associated with a corresponding category of skin and/or hair care compositions comprising 0 to 2% anti-dandruff agent; The second scalp group is associated with a corresponding category of skin and/or hair care compositions comprising 0 to 2% anti-dandruff agent; The third scalp group is associated with a corresponding category of skin and/or hair care compositions comprising 0 to 1% anti-dandruff agent; The fourth scalp group is associated with a corresponding class of skin and/or hair care compositions which are free of anti-dandruff agents, and The fifth scalp group is associated with a corresponding class of skin and/or hair care compositions that do not contain an anti-dandruff agent.
  10. 10. A method for recommending a skin care composition and/or a hair care composition and/or a skin care treatment and/or a hair care treatment to a user, comprising: Determining the scalp type of the user using the method according to one of claims 1 to 9; Determining the corresponding category of skin care composition and/or hair care composition and/or skin care treatment and/or hair care treatment based on the identified scalp type of the user, the corresponding category of skin care composition and/or hair care composition and/or skin care treatment and/or hair care treatment being compatible with the moisture level range and sebum level range of the scalp type of the user, and Outputting the corresponding class of skin and/or hair care compositions and/or skin and/or hair care treatments.
  11. 11. The method as recited in claim 10, further comprising: obtaining an enlarged photograph of the area of the user's scalp; When the number of red portions above a predetermined threshold on the magnified photograph is identified, a skin and/or hair care composition comprising a reduced proportion of surfactant suitable for sensitive scalp is recommended.
  12. 12. The method of claim 10 or 11, further comprising: Comparing a current value indicative of the moisture level of the region of the user's scalp and a current value indicative of the sebum level of the region of the user's scalp with previously obtained values for the region of the user's scalp; Outputting a suggestion to increase a frequency of shampooing using a hair care composition compatible with the scalp type of the user when determining that the sebum level of the area of the scalp of the user increases; when it is determined that the sebum level of the area of the scalp of the user is reduced, a suggestion to use a hair care composition or a skin care composition comprising a lower proportion of surfactant is output.
  13. 13. A computer program product comprising instructions for performing a method for determining a scalp type of a user, the method comprising: Obtaining as input a value indicative of a humidity level of an area of the user's scalp; Obtaining as input a value indicative of sebum level in the area of the scalp of the user; Comparing the obtained set comprising the value indicative of the humidity level and the value indicative of the sebum level with a reference range of scalp hydration levels and sebum levels, the reference range forming at least five scalp sets, each scalp set being associated with a humidity level range and a sebum level range, each scalp set also being associated with a corresponding category of skin care composition and/or hair care composition and/or skin care treatment and/or hair care treatment, the corresponding category of skin care composition and/or hair care composition and/or skin care treatment and/or hair care treatment being compatible with the humidity level range and sebum level range; identifying scalp types of the user in the at least five scalp groups based on the comparison, and The identified scalp type is output and, Wherein the at least five scalp groups comprise: A first scalp set corresponding to a hydration level of upper skin conductivity measurable between 0 μs and 40 μs and a reduced translucency sebum level of sebum absorbing band film measurable between 0 and 20% in contact with the scalp of the user; A second scalp group corresponding to a hydration level of upper skin conductivity measurable between 0 μs and 80 μs and a reduced translucency sebum level of sebum absorbing band film measurable between 20 and 60% in contact with the scalp of the user; A third scalp group corresponding to a hydration level of upper skin conductivity measurable between 0 μs and 80 μs and a reduced translucency sebum level of sebum absorbing band film measurable between 60 and 100% in contact with the scalp of the user; A fourth scalp group corresponding to a hydration level of upper skin conductivity measurable between 40 μs and 80 μs and a reduced translucency sebum level of sebum absorbing band film measurable between 0 and 40% in contact with the scalp of the user; a fifth scalp group corresponding to a hydration level of the upper layer skin conductivity measurable as 80 μs or more and a sebum level of reduced translucence of the sebum absorbing band film measurable as 0 to 60% in contact with the scalp of the user.

Description

Method for determining scalp type of user Technical Field The present invention relates to the field of skin and hair care, and more particularly to a method for determining scalp type of a user in order to classify scalp type into groups associated with suitable skin and hair care products or treatment advice. More specifically, it is an object of the present invention to make the determination of scalp type more objective to avoid false assessment of scalp condition that may lead to the selection of unsuitable scalp or hair care products, and to be more convenient to the user. Background Hair care involves selecting a product or treatment that is compatible with the condition of a person's hair. Damaged hair may often require products that can maintain hair structure without causing further damage. Hair care is not independent of skin care, particularly scalp care, as scalp conditions may have a strong impact on the overall appearance of a person's hairstyle and contribute to a healthy and attractive appearance or provide a negative overall impression, for example in the case of redness, oiliness or the presence of dandruff. Although treatments and products that are selected to hold both hair and scalp have a correlation, there is no general rule for selecting such products or treatments. Some people often have higher sebum secretion on their scalp and will therefore benefit from treatments and products that reduce sebum levels on their scalp, while others do the other way around. However, it is difficult to accurately assess a person's scalp condition because this portion of skin typically requires intervention by a third party to examine and is mostly hidden under the hair. Visual assessment of a person's scalp condition is often difficult and results in inaccurate observations. Oiliness and humidity can lead to similar visual evaluations, although they do not trigger the same treatment recommendations. To more accurately assess the scalp type of the user, biophysical measurements of skin conditions may be used. Typically, the electrodes may be used to infer humidity levels from measured skin conductivity. The oiliness can be determined as sebum level using a translucent band that contacts the scalp to absorb sebum. The presence of sebum on the bands changes their optically measurable translucency. Such measurements provide only a set of raw data that can help assess the true condition of the user's scalp. However, it is difficult to interpret individual measurements without any comparison means with other scalp. Document US 2019/02377194 A1 describes an example of a method for evaluating the scalp of a user and recommending a skin treatment product. The assessment of scalp type relies on measurements of hydration and sebum, which are compiled with further information provided by the user or other supplemental measurements. All provided information is converted into a health score to determine the type of scalp treatment. The method requires several inputs from the user in order to accurately assess his scalp condition. This approach is inconvenient for users who do not have too much time to answer a questionnaire or know how to answer questions at all and add subjectivity elements to the assessment of health scores. Furthermore, assessing a person's scalp type is a continuous process because scalp condition changes after each shampoo step and this may result in a change in the recommended hair and/or scalp treatment product or treatment. A method for simply and objectively evaluating the scalp type of a user is thus sought. Disclosure of Invention To address the above-mentioned need, the present invention provides a method for determining the scalp type of a user, the method comprising: obtaining a value indicative of a humidity level of an area of the user's scalp; obtaining a value indicative of sebum levels in the region of the scalp of the user; Comparing the obtained set comprising the value indicative of the humidity level and the value indicative of the sebum level with a reference range of scalp hydration levels and sebum levels, the reference range forming at least five scalp sets, each scalp set being associated with a humidity level range and a sebum level range, each scalp set being further associated with a corresponding category of skin and/or hair care compositions and/or skin and/or hair care treatments that are compatible with the humidity level range and sebum level range; identifying scalp types of the user in the at least five scalp groups based on the comparison, and Outputting the identified scalp type. The present invention overcomes the burden of subjectively assessing the scalp type of a user by visual observation by providing a simple and objective method of determining the scalp type of a user, which may be implemented with a portable device and a processor or computer (which may be part of the portable device). In order to be able to make this automatic and objective assessm