EP3416521A1 - Séchage et coiffure de cheveux à ultrasons - Google Patents
Séchage et coiffure de cheveux à ultrasonsInfo
- Publication number
- EP3416521A1 EP3416521A1 EP17704502.8A EP17704502A EP3416521A1 EP 3416521 A1 EP3416521 A1 EP 3416521A1 EP 17704502 A EP17704502 A EP 17704502A EP 3416521 A1 EP3416521 A1 EP 3416521A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- hair
- ultrasound
- styling
- mhz
- drying
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 210000004209 hair Anatomy 0.000 title claims abstract description 111
- 238000002604 ultrasonography Methods 0.000 title claims abstract description 104
- 238000001035 drying Methods 0.000 title claims abstract description 42
- 238000005259 measurement Methods 0.000 claims abstract description 4
- 238000000034 method Methods 0.000 claims description 10
- 238000010438 heat treatment Methods 0.000 description 12
- 238000002663 nebulization Methods 0.000 description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 6
- 230000008901 benefit Effects 0.000 description 3
- 230000006378 damage Effects 0.000 description 3
- 238000002474 experimental method Methods 0.000 description 3
- 239000010408 film Substances 0.000 description 3
- 230000007246 mechanism Effects 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 230000001419 dependent effect Effects 0.000 description 2
- 239000000835 fiber Substances 0.000 description 2
- 230000003700 hair damage Effects 0.000 description 2
- 230000003806 hair structure Effects 0.000 description 2
- 229910052739 hydrogen Inorganic materials 0.000 description 2
- 239000001257 hydrogen Substances 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000013021 overheating Methods 0.000 description 2
- 210000004761 scalp Anatomy 0.000 description 2
- 206010019049 Hair texture abnormal Diseases 0.000 description 1
- 206010053615 Thermal burn Diseases 0.000 description 1
- 238000000889 atomisation Methods 0.000 description 1
- 238000002788 crimping Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000004925 denaturation Methods 0.000 description 1
- 230000036425 denaturation Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000009477 glass transition Effects 0.000 description 1
- 230000003803 hair density Effects 0.000 description 1
- 230000003695 hair diameter Effects 0.000 description 1
- 230000003699 hair surface Effects 0.000 description 1
- 235000000396 iron Nutrition 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 102000004169 proteins and genes Human genes 0.000 description 1
- 108090000623 proteins and genes Proteins 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 238000010897 surface acoustic wave method Methods 0.000 description 1
- 238000007669 thermal treatment Methods 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
Classifications
-
- A—HUMAN NECESSITIES
- A45—HAND OR TRAVELLING ARTICLES
- A45D—HAIRDRESSING OR SHAVING EQUIPMENT; EQUIPMENT FOR COSMETICS OR COSMETIC TREATMENTS, e.g. FOR MANICURING OR PEDICURING
- A45D1/00—Curling-tongs, i.e. tongs for use when hot; Curling-irons, i.e. irons for use when hot; Accessories therefor
- A45D1/28—Curling-tongs, i.e. tongs for use when hot; Curling-irons, i.e. irons for use when hot; Accessories therefor with means for controlling or indicating the temperature
-
- A—HUMAN NECESSITIES
- A45—HAND OR TRAVELLING ARTICLES
- A45D—HAIRDRESSING OR SHAVING EQUIPMENT; EQUIPMENT FOR COSMETICS OR COSMETIC TREATMENTS, e.g. FOR MANICURING OR PEDICURING
- A45D1/00—Curling-tongs, i.e. tongs for use when hot; Curling-irons, i.e. irons for use when hot; Accessories therefor
- A45D1/06—Curling-tongs, i.e. tongs for use when hot; Curling-irons, i.e. irons for use when hot; Accessories therefor with two or more jaws
-
- A—HUMAN NECESSITIES
- A45—HAND OR TRAVELLING ARTICLES
- A45D—HAIRDRESSING OR SHAVING EQUIPMENT; EQUIPMENT FOR COSMETICS OR COSMETIC TREATMENTS, e.g. FOR MANICURING OR PEDICURING
- A45D20/00—Hair drying devices; Accessories therefor
- A45D20/04—Hot-air producers
- A45D20/08—Hot-air producers heated electrically
- A45D20/10—Hand-held drying devices, e.g. air douches
- A45D20/12—Details thereof or accessories therefor, e.g. nozzles, stands
-
- A—HUMAN NECESSITIES
- A45—HAND OR TRAVELLING ARTICLES
- A45D—HAIRDRESSING OR SHAVING EQUIPMENT; EQUIPMENT FOR COSMETICS OR COSMETIC TREATMENTS, e.g. FOR MANICURING OR PEDICURING
- A45D7/00—Processes of waving, straightening or curling hair
-
- A—HUMAN NECESSITIES
- A45—HAND OR TRAVELLING ARTICLES
- A45D—HAIRDRESSING OR SHAVING EQUIPMENT; EQUIPMENT FOR COSMETICS OR COSMETIC TREATMENTS, e.g. FOR MANICURING OR PEDICURING
- A45D2200/00—Details not otherwise provided for in A45D
- A45D2200/20—Additional enhancing means
- A45D2200/207—Vibration, e.g. ultrasound
Definitions
- the invention relates to an ultrasound hair care device and method for drying and styling hair.
- hair styling as used herein is intended to encompass all actions such as hair crimping, curling, perming and straightening.
- US 2012/0291797 discloses a hair styling apparatus that includes a hair- heating device for applying heat to hair.
- the hair-heating device has a moisture-temperature setting and a dry-temperature setting less than moisture-temperature setting.
- a moisture sensor detects a moisture-indicating parameter of the hair, and generates a moisture-indicating signal indicative of whether the hair is at or below a predetemlined moisture threshold level.
- a control circuit adjusts the temperature of the hair-heating device from the moisture- temperature setting to the dry-temperature setting in response to the moisture sensor generating a moisture indicating signal indicative of the hair being at or below the
- the hair-heating device is active in the dry- temperature setting.
- US 2006/0272669 discloses hair styling appliances that utilize ultrasonic vibration for hair styling, and mentions that it is possible to atomize moisture inside hair to evaporate the moisture by ultrasonic vibration, even under room temperature. It is thus not necessary to use an extremely high temperature (e.g., 130° C) in order to evaporate moisture inside hair, which high temperature causes denaturation of protein and scald.
- an extremely high temperature e.g. 130° C
- the present invention is based on the new insight that nebulizing (the water for drying the hair) and styling with optimized but distinctively different ultrasound frequencies have significant benefits over using a single frequency range for both styling and drying with ultrasound. Moreover, styling can only be done in an optimal way when the hairs are dry.
- a first aspect of the invention provides an ultrasound hair care device for drying and styling hair.
- An ultrasound unit applies ultrasound to the hair.
- a hair moisture measurement unit measures a moisture level of the hair.
- a control unit controls the ultrasound unit based on the moisture level.
- ultrasound is applied to the hair at a first frequency not exceeding 1 MHz for drying the hair, and/or at a second frequency of at least 1 MHz for styling the hair in dependence on the moisture level.
- the first frequency does not exceed 0.5 MHz, and preferably does not exceed 0.4 MHz.
- the second frequency is advantageously at least 5 MHz, and preferably between 6.4 MHz and 500 MHz.
- the control unit may comprise a look-up-table for switching the ultrasound unit to operate at the first frequency and/or at the second frequency in dependence on the moisture level.
- a second aspect of the invention provides a hair care method of drying and styling hair, the hair care method comprising measuring a hair moisture level; and applying ultrasound to the hair at a first frequency not exceeding 1 MHz for drying the hair and/or at a second frequency of at least 1 MHz for styling the hair in dependence of the hair moisture level.
- Fig. 1 shows a first embodiment of an ultrasound hair care device for drying and styling hair in accordance with the present invention.
- Fig. 2 schematically represents how the ultrasound frequencies for drying and styling can be applied over time.
- Fig. 3 illustrates ultrasound threshold intensities of the three identified main mechanisms involved in hair drying and styling as a function of ultrasound intensity.
- Fig. 4 shows a second embodiment of an ultrasound hair care device for drying and styling hair in accordance with the present invention.
- Fig. 1 shows an embodiment of an ultrasound hair care device 10 for drying hair and styling of hair.
- a first ultrasound generator 12 generates ultrasound at a frequency between 20 kHz to 0.4 MHz.
- a second ultrasound generator 14 generates ultrasound at a frequency between 6.4 MHz to 500 MHz.
- a first ultrasound transducer 16 in electrical communication with the first ultrasound generator 12 applies ultrasound to the water in hair lock 20 for nebulizing the water in hair lock as to dry hair.
- a second ultrasound transducer 18 in electrical communication with the second ultrasound generator 14 applies ultrasound to the hair lock 20 to style the hair.
- a hair moisture measurement unit 22 measures the moisture level of the hair lock 20.
- a control unit 24 controls a level of energy of the first ultrasound generator 12 and the second ultrasound generator 14 based on the measured hair moisture level as to provide optimum drying and styling to the hair.
- Nebulization by means of ultrasound can be achieved within a frequency range of 20 kHz - 1 MHz. To prevent cavitation, a frequency range of 20 kHz - 0.4 MHz is preferably selected. Styling by means of ultrasound can be achieved within a frequency range of 1 MHz - 500 MHz. To prevent cavitation, a frequency range of 6.4 MHz - 500 MHz could be selected. Finally, moisture sensing by means of ultrasound can be achieved within a frequency range of 100 kHz to 1 MHz. The preferred range of intensity of an effective ultrasound-based hair styling device is between 1 W/cm 2 and 10 W/cm 2 measured at the transducer-hair interface.
- Fig. 2 schematically represents how the ultrasound frequencies for drying D and styling S can be applied over time.
- Starting with wet hair initially relatively much ultrasound energy is applied at the ultrasound frequency for drying D, and relatively little ultrasound energy is applied at the ultrasound frequency for styling S.
- the amount of ultrasound energy applied at the ultrasound frequency for drying D becomes smaller, and the amount of ultrasound energy applied at the ultrasound frequency for styling S becomes larger.
- ultrasound styling and drying can be accomplished with different as well as overlapping frequency ranges.
- An average power limit of 10 W/cm 2 and application time was set to max 60 s to maintain practical relevance.
- Fig. 3 illustrates ultrasound threshold intensities of the three identified main mechanisms involved in hair drying and styling as a function of ultrasound intensity.
- the horizontal axis indicates frequencies in MHz, and the vertical axis indicates the threshold intensity in W/cm 2 .
- Curve A shows the threshold for styling through ultrasound heating (assuming all power is absorbed by hairs, 60 s).
- Curve B shows the threshold for styling through ultrasound heating (60% relative humidity, matched to experiments, 60 s).
- Curve C shows the threshold for nebulization (typical water film thickness), and curves CI - C2 show thresholds for nebulization (limits for 2-10 ⁇ water film thickness).
- Curve D shows the threshold for cavitation.
- Region 1 is a preferred region for ultrasound based styling (heating + cavitation).
- Region 2 is a preferred region for ultrasound based drying (nebulization).
- Region 3 is a preferred region for ultrasound based styling & drying.
- Region 4 is a preferred region for ultrasound based styling (heating).
- cavitation For cavitation to take place at least a thin film of liquid has to be present on the hairs.
- cavitation can play a role to enhance the drying process.
- Styling should preferably only take place once the hair has fully dried to prevent cavitation from happening.
- cavitation can damage the hair structure.
- two non-overlapping frequencies are preferred for several reasons:
- a combined ultrasound styling & drying effect requires a very narrow frequency range and a setup with little losses (Region 3).
- the threshold for styling through ultrasound heating will lie somewhere between the threshold as predicted by 100% absorption of ultrasound power in hairs (Curve A) and less efficient absorption of ultrasound power in hairs as found in experiments (Curve B), thus significantly shrinking the preferred region for ultrasound based styling & drying (Region 3).
- Variation in moisture content, relative humidity, hair density, hair diameter, volume etc. will all influence the preferred region for ultrasound based styling and drying, making it very hard to predict the right settings let alone to predetermine said parameters to fall in a viable frequency range for styling and drying.
- Fig. 4 shows a second embodiment of an ultrasound hair care device for drying and styling hair in accordance with the present invention.
- the main features of the ultrasound hair drying system of Fig. 4 include an ultrasound generator 100, an ultrasound amplifier 101, three ultrasound transducers 102 A, 102B, 102C (one for styling, one for drying, one for moisture sensing), a droplet handler 105, water film and droplets 103, 103 A, a control system 106, a user interface 107, and a thermal detector 108 to prevent overheating.
- the ultrasound generator 100 generates fixed or variable low- voltage ultrasound pulses, with frequency, voltage and pulse duration controlled by the control system 106 depending on treatment settings selected through the user interface 107 and the moisture content of the hairs detected by the ultrasound receiver 102C. This will enable atomization of liquid (103 A, 103B) from the hair surface 104. The resulting droplets will be removed or extracted by the droplet handler 105, which could be a simple air blower/extractor or something more complex.
- the hair care device can then be made to be safe for use if it is carefully designed such that:
- a material with low acoustic impedance e.g. air
- a material with low acoustic impedance e.g. air
- the transducer does not emit ultrasound.
- Piezoelectric crystals are used to produce ultrasound (> 20 kHz).
- Non-piezoelectric techniques like Capacitance Micro -machined Ultrasonic Transducers (CMUT) can be used for higher frequencies (typically up to -100 MHz) and can be used with this invention. These techniques use relatively small transducers and are cheaper, thereby making it attractive for both home use and semi-professional hair care applications.
- CMUT Capacitance Micro -machined Ultrasonic Transducers
- CMUT transducers are used, a single ultrasound transducer may be used for both ultrasound frequencies. It is possible to have a hard switch between the different ultrasound frequencies in that below a certain moisture level the first frequency is produced while above that moisture level the second frequency is produced. It is alternatively possible to have a soft switch allowing for a gradual reduction of the intensity of the ultrasound produced at the first frequency, and a gradual increase of the intensity of the ultrasound produced at the second frequency, as a result of a decreasing moisture level of the hair. In such a soft switching embodiment, a look-up table is preferably used in the control unit for determining the intensities of the ultrasound produced at the first and second frequencies in dependence of the moisture level.
- any reference signs placed between parentheses shall not be construed as limiting the claim.
- the word “comprising” does not exclude the presence of elements or steps other than those listed in a claim.
- the word "a” or “an” preceding an element does not exclude the presence of a plurality of such elements.
- the invention may be implemented by means of hardware comprising several distinct elements, and/or by means of a suitably programmed processor. In the device claim enumerating several means, several of these means may be embodied by one and the same item of hardware. The mere fact that certain measures are recited in mutually different dependent claims does not indicate that a combination of these measures cannot be used to advantage.
Landscapes
- Cleaning And Drying Hair (AREA)
- Cosmetics (AREA)
Abstract
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PL17704502T PL3416521T3 (pl) | 2016-02-17 | 2017-02-16 | Suszenie i stylizacja włosów ultradźwiękami |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP16156168.3A EP3207817A1 (fr) | 2016-02-17 | 2016-02-17 | Séchage et coiffure des cheveux par ultrasons |
PCT/EP2017/053461 WO2017140757A1 (fr) | 2016-02-17 | 2017-02-16 | Séchage et coiffure de cheveux à ultrasons |
Publications (2)
Publication Number | Publication Date |
---|---|
EP3416521A1 true EP3416521A1 (fr) | 2018-12-26 |
EP3416521B1 EP3416521B1 (fr) | 2020-04-08 |
Family
ID=55405168
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP16156168.3A Withdrawn EP3207817A1 (fr) | 2016-02-17 | 2016-02-17 | Séchage et coiffure des cheveux par ultrasons |
EP17704502.8A Active EP3416521B1 (fr) | 2016-02-17 | 2017-02-16 | Séchage et coiffure des cheveux par ultrasons |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP16156168.3A Withdrawn EP3207817A1 (fr) | 2016-02-17 | 2016-02-17 | Séchage et coiffure des cheveux par ultrasons |
Country Status (6)
Country | Link |
---|---|
US (1) | US20210204667A1 (fr) |
EP (2) | EP3207817A1 (fr) |
CN (1) | CN108697217B (fr) |
ES (1) | ES2792081T3 (fr) |
PL (1) | PL3416521T3 (fr) |
WO (1) | WO2017140757A1 (fr) |
Families Citing this family (26)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2513884B (en) | 2013-05-08 | 2015-06-17 | Univ Bristol | Method and apparatus for producing an acoustic field |
US9612658B2 (en) | 2014-01-07 | 2017-04-04 | Ultrahaptics Ip Ltd | Method and apparatus for providing tactile sensations |
GB2530036A (en) | 2014-09-09 | 2016-03-16 | Ultrahaptics Ltd | Method and apparatus for modulating haptic feedback |
WO2016132144A1 (fr) | 2015-02-20 | 2016-08-25 | Ultrahaptics Ip Limited | Perceptions dans un système haptique |
EP3259654B1 (fr) | 2015-02-20 | 2021-12-29 | Ultrahaptics Ip Ltd | Améliorations d'algorithme dans un système haptique |
US10818162B2 (en) | 2015-07-16 | 2020-10-27 | Ultrahaptics Ip Ltd | Calibration techniques in haptic systems |
US11189140B2 (en) | 2016-01-05 | 2021-11-30 | Ultrahaptics Ip Ltd | Calibration and detection techniques in haptic systems |
US10268275B2 (en) | 2016-08-03 | 2019-04-23 | Ultrahaptics Ip Ltd | Three-dimensional perceptions in haptic systems |
US10943578B2 (en) | 2016-12-13 | 2021-03-09 | Ultrahaptics Ip Ltd | Driving techniques for phased-array systems |
US11531395B2 (en) | 2017-11-26 | 2022-12-20 | Ultrahaptics Ip Ltd | Haptic effects from focused acoustic fields |
US11704983B2 (en) | 2017-12-22 | 2023-07-18 | Ultrahaptics Ip Ltd | Minimizing unwanted responses in haptic systems |
WO2019122912A1 (fr) | 2017-12-22 | 2019-06-27 | Ultrahaptics Limited | Suivi dans des systèmes haptiques |
WO2019211616A1 (fr) | 2018-05-02 | 2019-11-07 | Ultrahaptics Limited | Structure de plaque de blocage pour une efficacité de transmission acoustique améliorée |
US11098951B2 (en) | 2018-09-09 | 2021-08-24 | Ultrahaptics Ip Ltd | Ultrasonic-assisted liquid manipulation |
US11378997B2 (en) | 2018-10-12 | 2022-07-05 | Ultrahaptics Ip Ltd | Variable phase and frequency pulse-width modulation technique |
EP3643196A1 (fr) * | 2018-10-25 | 2020-04-29 | Koninklijke Philips N.V. | Coiffage utilisant un chauffage diélectrique |
US11550395B2 (en) | 2019-01-04 | 2023-01-10 | Ultrahaptics Ip Ltd | Mid-air haptic textures |
US11842517B2 (en) | 2019-04-12 | 2023-12-12 | Ultrahaptics Ip Ltd | Using iterative 3D-model fitting for domain adaptation of a hand-pose-estimation neural network |
CA3154040A1 (fr) | 2019-10-13 | 2021-04-22 | Benjamin John Oliver LONG | Capotage dynamique avec microphones virtuels |
US11374586B2 (en) | 2019-10-13 | 2022-06-28 | Ultraleap Limited | Reducing harmonic distortion by dithering |
US11169610B2 (en) | 2019-11-08 | 2021-11-09 | Ultraleap Limited | Tracking techniques in haptic systems |
US11715453B2 (en) | 2019-12-25 | 2023-08-01 | Ultraleap Limited | Acoustic transducer structures |
US11816267B2 (en) | 2020-06-23 | 2023-11-14 | Ultraleap Limited | Features of airborne ultrasonic fields |
EP3935993A1 (fr) | 2020-07-07 | 2022-01-12 | Koninklijke Philips N.V. | Sèche-cheveux |
WO2022058738A1 (fr) | 2020-09-17 | 2022-03-24 | Ultraleap Limited | Ultrahapticons |
CN112325570A (zh) * | 2020-11-02 | 2021-02-05 | 中国兵器科学研究院宁波分院 | 一种基于压电晶片的夹板式超声干燥装置及其干燥方法 |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
ES2014803A6 (es) * | 1989-07-17 | 1990-07-16 | Sinetics Sa | Secador por ultrasonidos. |
US6196236B1 (en) * | 1997-06-30 | 2001-03-06 | Matsushita Electric Works, Ltd. | Ultrasonic hair curling device |
JP2006334110A (ja) * | 2005-06-01 | 2006-12-14 | Matsushita Electric Works Ltd | 超音波毛髪処理装置 |
JP2006334109A (ja) | 2005-06-01 | 2006-12-14 | Matsushita Electric Works Ltd | ヘアセット装置 |
JP4944839B2 (ja) * | 2008-06-09 | 2012-06-06 | パナソニック株式会社 | ヘアセット装置 |
US9138038B2 (en) | 2011-05-20 | 2015-09-22 | Spectrum Brands, Inc. | Hair styling apparatus having hair-protection function |
US20120312320A1 (en) | 2011-06-13 | 2012-12-13 | Humphreys James D | Method and hair care tool for dynamic and optimum hair styling temperature control |
US10267772B2 (en) * | 2014-03-03 | 2019-04-23 | Empire Technology Development Llc | Hair moisture measuring device, and methods of making and using the device |
-
2016
- 2016-02-17 EP EP16156168.3A patent/EP3207817A1/fr not_active Withdrawn
-
2017
- 2017-02-16 WO PCT/EP2017/053461 patent/WO2017140757A1/fr active Application Filing
- 2017-02-16 ES ES17704502T patent/ES2792081T3/es active Active
- 2017-02-16 CN CN201780011865.XA patent/CN108697217B/zh active Active
- 2017-02-16 EP EP17704502.8A patent/EP3416521B1/fr active Active
- 2017-02-16 PL PL17704502T patent/PL3416521T3/pl unknown
- 2017-02-16 US US15/999,589 patent/US20210204667A1/en not_active Abandoned
Also Published As
Publication number | Publication date |
---|---|
US20210204667A1 (en) | 2021-07-08 |
ES2792081T3 (es) | 2020-11-10 |
CN108697217A (zh) | 2018-10-23 |
PL3416521T3 (pl) | 2020-11-02 |
EP3416521B1 (fr) | 2020-04-08 |
CN108697217B (zh) | 2022-08-12 |
EP3207817A1 (fr) | 2017-08-23 |
WO2017140757A1 (fr) | 2017-08-24 |
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