EP3453282A1 - Haarstylingvorrichtung - Google Patents

Haarstylingvorrichtung Download PDF

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Publication number
EP3453282A1
EP3453282A1 EP17190265.3A EP17190265A EP3453282A1 EP 3453282 A1 EP3453282 A1 EP 3453282A1 EP 17190265 A EP17190265 A EP 17190265A EP 3453282 A1 EP3453282 A1 EP 3453282A1
Authority
EP
European Patent Office
Prior art keywords
hair
heat
hair styling
optical radiation
styling device
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.)
Withdrawn
Application number
EP17190265.3A
Other languages
English (en)
French (fr)
Inventor
Wouter Hendrik Cornelis SPOORENDONK
Nikolaj Vasiljevitsj ZJIROECHA
Laurentine COSTECALDE
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Koninklijke Philips NV
Original Assignee
Koninklijke Philips NV
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Koninklijke Philips NV filed Critical Koninklijke Philips NV
Priority to EP17190265.3A priority Critical patent/EP3453282A1/de
Priority to RU2020113294A priority patent/RU2770720C2/ru
Priority to CN201880072757.8A priority patent/CN111315253B/zh
Priority to KR1020207010301A priority patent/KR102581430B1/ko
Priority to US16/644,535 priority patent/US20200187618A1/en
Priority to MX2020002516A priority patent/MX2020002516A/es
Priority to PL18759140T priority patent/PL3681334T3/pl
Priority to EP18759140.9A priority patent/EP3681334B1/de
Priority to JP2020513291A priority patent/JP7012146B2/ja
Priority to PCT/EP2018/073508 priority patent/WO2019048357A1/en
Priority to BR112020004486-5A priority patent/BR112020004486B1/pt
Publication of EP3453282A1 publication Critical patent/EP3453282A1/de
Withdrawn legal-status Critical Current

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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
    • A45D2/00—Hair-curling or hair-waving appliances ; Appliances for hair dressing treatment not otherwise provided for
    • A45D2/36—Hair curlers or hair winders with incorporated heating or drying means, e.g. electric, using chemical reaction
    • A45D2/367—Hair curlers or hair winders with incorporated heating or drying means, e.g. electric, using chemical reaction with electrical heating means
    • 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
    • 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
    • A45D2200/205—Radiation, e.g. UV, infrared

Definitions

  • the invention relates to a hair styling device for e.g. hair crimping, curling, perming and straightening.
  • WO2017080957A1 discloses a hair styling device comprising a heat source for heating hair up till a first temperature that is no more than 150 °C, and a radiation source for - in combination with heat from the heat source - selectively heating a hair cortex to a second temperature exceeding the first temperature and sufficiently high for hair styling.
  • the heat source may be formed by e.g. hot plates which are directly or indirectly heated to a first temperature of e.g. 120 °C that is lower than a critical temperature for cuticle damage.
  • the radiation source may be formed by e.g.
  • a Continuous Wave, pulsed laser source or an Intense Pulsed Light device with a low pass filter, for emitting a wavelength range between 400 and 600 nm, and preferably between 450 and 550 nm, which will selectively heat the cortex to a second temperature of about 170 °C that is sufficiently high for styling, for a duration of about a few milliseconds to a few seconds.
  • Embodiments of the invention provide a hair styling device comprising a heat source for heating hair, and an optical radiation source for - in combination with heat from the heat source - heating the hair to a temperature sufficiently high for hair styling, in which the heat source obtains its heat from energy provided by the optical radiation source, and in a preferred embodiment, only from the optical radiation source.
  • the heat source may include a heat sink of the optical radiation source.
  • the optical radiation source may advantageously be covered by a cover that is not fully transparent, whereby optical radiation energy is transformed into thermal energy, the heat source including the cover.
  • the cover may advantageously be largely transparent for wavelengths effective for hair styling, while the cover is largely not transparent for wavelengths less effective for hair styling.
  • the optical radiation source may be covered by a cover that is heated by the heat source.
  • FIGS. 1A - 1E , 2-4 show various embodiments of the invention.
  • An embodiment of the invention features a handheld hair styling device of the type disclosed in applicant's earlier application EP3216368 (Attorney's ref. 2016PF00294), incorporated herein by reference, which comprises:
  • high brightness high efficiency LEDs outputting light in the range between 800 nm to 1000 nm may result in a better penetration depth.
  • the absorption is relatively lower than using lower wavelengths, styling by means of such LEDs emitting light in the range between 800 nm to 1000 nm could be more cost-effective than using high power near infrared LEDs.
  • the pulse width may be up to 1.5 s to achieve the required fluence with medium-power LEDs.
  • a certain range of wavelengths preferably between 400 and 900 nm and more preferably between 400 and 550 nm
  • a short period of time preferably shorter than 300 ms.
  • the hair is at room temperature (e.g. 20 °C).
  • room temperature e.g. 20 °C.
  • Temperature increases of 180 °C can be realized within a time frame of 0.05 - 1.5 s.
  • the light flash to achieve this temperature increase requires a lot of optical power.
  • the LED engine of a consumer device
  • the same temperature increase can be realized with much lower power requirements and thus lower costs.
  • the invention is based on the recognition that such light emitting diodes (LED) configured to deliver optical energy to hair, also produce heat. While LEDs are known to be very energy efficient, e.g. for blue light, using the most energy-efficient LEDs [2017], about 50% of the electrical input will become optical energy. However, while this is great compared to other light sources, it still means that the other 50% of the input energy becomes waste (heat)! In accordance with the principles of the present invention, this heat does not have to be wasted. While the thermal diffusion rate may be lower for conduction than for absorption, every form of heat applied towards the hairs is beneficial as it may be used to reduce the optical requirements.
  • the LEDs not only produce optical energy but also thermal energy, which must be removed from the LEDs by means of heat sinks, this heat can be advantageously used in a useful way to pre-heat the hair before the hair is exposed to the light.
  • a temperature of e.g. 60 °C the LEDs only need to heat up the hair from that 60 °C to a temperature sufficient for hair styling (i.e. above its glass transition temperature), instead of from room temperature (e.g. 20 °C) to that temperature sufficient for hair styling. So, the LEDs need to provide less optical energy to the hair, while the heat from the LEDs is efficiently re-used.
  • an intense light source (LEDs) is flashed at a short distance from the hair ( ⁇ 1 cm). This can be done with a short intense pulse ( ⁇ 0.1 s) however this requires a lot of optical power (> 4 J/cm 2 ). It is more efficient to heat the hair in multiple flashes or within a longer exposure time (> 0.3 s). For multiple flashes it is preferred to pulse again within the thermal relaxation time of the hair. This lowers the optical system requirements, and use can be made of the increased hair temperature as a new baseline. Directly after a light flash ( ⁇ 5 s, more preferably ⁇ 1 s, most preferred ⁇ 0.3 s) the hair temperature (To) is increased.
  • the temperature increase is only temporally: it decreases in time. Therefore, the shorter the interval between the flashes, the less time there is for the hair to cool down. As a result, the hair temperature is higher after two identical light flashes with a small interval ( ⁇ 0.2 s) in-between compared to two individual light flashes with a longer interval (> 0.3 s) in-between.
  • the hairs are heated in two of multiple light flashes, in such a way that the light interval between subsequent flashes is preferably within the thermal relaxation time of the hair volume ( ⁇ 0.3 s).
  • the optical requirements can decrease, but in turn the diodes will heat up much more (around 100 °C) compared to small duty cycles (e.g. 0.1 s).
  • the generated heat will, in the end, decrease the optical efficacy.
  • this heat is cooled down and/or dissipated in the environment (air) but now it is an aspect of this invention to recycle the heat loss of the light system. In one embodiment, this is done by creating a thermally isolated bridge between the heat sink of the LEDs and the treatment area. This way the generated heat of the light engine is fed into the hairs via conduction. This will lower the optical system requirements or at least compensates for any efficiency decrease during heating of the LEDs.
  • Embodiments of the invention thus provide that the heat loss of the light system is reused and guided to the hairs, and that the heat sinks of the light sources are thermally connected to "hot plates" which are located next to the light emitting treatment areas. In accordance with an embodiment of the invention, only the light sources produce heat.
  • Exemplary embodiments of the heat recycling of the LEDs feature a handheld hair styling device 20 in the form of a hair straightener, and comprise light exposure units 21 with arrays of light-emitting diodes (LEDs) inside.
  • Fig. 1A shows a side-view of the hair straightener
  • Fig. 1B shows a cross-section of one leg of the hair straightener.
  • the heat sinks of the LEDs are thermally connected to a thermal bridge 22 which surfaces next to the LED treatment area. In this embodiment, the hairs will be in contact with the heat bridge 22 before they are exposed to light.
  • the hairs are heated both via the heat bridge 22 and the light exposure unit 21, and thus less optical power is needed, as the required styling temperatures (120 - 180 °C) are obtained by the combination of conduction heating by the heat bridge 22 and absorption of light from the light exposure unit 21.
  • the contact area of the hot plate 22 is preferably as large as possible to allow as much hair temperature increase.
  • the LEDs will only be powered if the device is closed, i.e. if the legs of the hair straightener of Fig. 1A are in a position in which the hair is clamped between the legs, which can be detected by means of a switch that is only pushed if the legs of this straightener touch one another.
  • Figs. 1C-1E shows advantageous layouts of the LEDs 21 in the upper and lower legs of the hair straightener 20, in a zone between parts of the heat bridge 22.
  • This layout is based on the following considerations. In case no hair is clamped in-between the two legs of the hair straightener, or if the hairs do not cover the full treatment area, the LEDs in the upper and lower legs of the hair straightener will irradiate each other. The LEDs will absorb the light from the opposed member and will start to heat up, which will negatively affect the lifetime of the LEDs. Secondly, if the irradiance is absorbed by other material than the hair it is not used for treatment. Therefore, in the embodiments of Fig.
  • the opposed LEDs are positioned "out of phase”: a LED in one leg of the hair straightener will not face another LED in the other leg of the hair straightener. If reflective materials are used at the opposed blank spaces, photons can be recycled. As the reflected light preferably should not be guided back into the LED it came from, the reflective materials should reflect side-wards (herein, the notion side-wards covers all directions except for reflecting light back into the LED or LEDs from which the light originated).
  • the zone between the parts of the heat bridge 22 that touch the hairs is provided with a transparent cover that is heated by the heat bridge 22, either from the side or because the cover also covers the heat bridge 22.
  • the transparent cover is not fully transparent, in that it absorbs wavelengths > 1000 nm that are not useful for hair styling. This way wavelengths that are not effective to treat hairs are used to heat the treatment area, which heat is again useful for hair styling.
  • a second embodiment of the invention illustrates an auto-curler (e.g. of the type as shown in WO2016042476 or WO2017029382 ) in which according to the present invention, hair H is first guided along a heat bridge 22, before it is exposed to light L from a LED unit 21 and wrapped around a cylinder C.
  • the heat bridge 22 ensures that the heat generated by the LED unit 21 is used to preheat the hair H before the hair is exposed to the light L from the LED unit 21.
  • this device is inherently safe as there is no risk of light reaching the eyes.
  • FIG. 3 Another embodiment of the invention, shown in Fig. 3 , features a handheld hair curling device 30 (e.g. an auto-curler) comprising a light exposure unit 31 (e.g. rod-shaped) with light-emitting diodes (LEDs).
  • the light exposure unit 31 is covered by a transparent material around which hair to be treated is wrapped.
  • the inside of the hair curling device 30 around the light exposure unit 31 may be reflective to ensure that all emitted photons are optimally used for hair styling.
  • Option 1 In the transparent material a filter is included which is ideally completely transparent to the LED light emitted but absorbs the heat reflected or conducted via the hairs. The filter only works from the outside in. Not vice versa.
  • Option 2 In the transparent material a filter is included which is transparent for wavelengths smaller than 1000 nm (in particular between 400 nm and 1000 nm, i.e. the wavelengths useful for hair styling) and absorbs wavelengths > 1000 nm that are not useful for hair styling. This way wavelengths that are not effective to treat hairs are used to heat the treatment area, which heat is again useful for hair styling.
  • Option 3 In the transparent material a filter is included which is transparent to the LED light emitted while it is thermally connected to the heat sink of the LED. This way the transparent material is heated to temperatures around 60 to 100 °C.
  • Option 4 Around the surface of the light exposure unit 31, strips of LEDs alternate with strips of a heat sink of the LEDs. The strips are preferably oriented in the longitudinal direction of the rod-shaped light exposure unit 31.
  • a transparent cover 23 (e.g. made of polycarbonate or glass) covering the light engine(s) 21 is not fully transparent (80% transparent or higher) to the light. This way the cover 23 is heated which will (pre-)heat the hair via conduction.
  • the transparent cover 23 covering the light engine is only transparent to wavelengths between 400 and 1000 nm, i.e. the wavelengths that are useful for hair styling. Other wavelengths are absorbed in the cover 23 which will heat the cover plate. This heat is used to (pre-)heat the hairs via conduction, and so again in a way that is useful for hair styling.
  • the cover 23 may cover the heat bridge 22 so that the cover 23 is heated also by the heat bridge 22.
  • the system uses pulsed LEDs to style hair.
  • the output wavelength is preferably in the range between 400 and 900 nm, and more preferably in the range between 450 and 550 nm.
  • the pulse width is preferably shorter than or equal to 200 ms, and more preferably shorter than or equal to 100 ms.
  • the output energy fluence on the hair surface is preferably in the range between 1 J/cm 2 and 10 J/cm 2 , more preferably between 3 J/cm 2 and 7 J/cm 2 , and most preferably between 4 and 6 J/cm 2 .
  • the LED heat is guided towards the treatment area via a "heat bridge", and a light filter (absorber) may be included in the treatment area.
  • embodiments of the present invention feature technology to heat and therefore style hairs by both absorption and conduction. Primarily hairs are heated by absorption (optical energy). However, during light generation heat will be generated as well. The latter does not have to be wasted in the process: this heat is reused into the system to lower the optical system requirements or at least compensate for any efficiency decrease during heating of the LEDs.
  • embodiments of the present invention are related to a hair styling device comprising a light engine to deliver optical energy to hair, in which the hair styling device is arranged to allow moist escaping from the hair in response to optical energy being applied to the hair, to escape from the hair styling device.
  • the light engine is the sole energy source for hair styling.
  • a ventilator may move the moist away from the light engine.
  • a processor may control the light engine, in which case the ventilator may also serve to cool the processor and/or the light engine.
  • the hair styling device may comprise clamping members arranged for allowing hair to be guided between and styled by the clamping members, at least one of the clamping members being provided with the light engine. At least one of the clamping members may be provided with openings for allowing moist to escape, or with openings for allowing air to enter so as to convey the moist out of the hair styling device.
  • the clamping members may have non-conforming shapes to allow the moist to escape from the hair styling device.
  • a hair treatment area comprising the light engine may have a gap through which the hair can be guided, the gap being sufficiently wide to allow the moist to escape.
  • a width of the gap may be between 0.3 and 5 mm, and preferably between 1 and 2 mm.
  • embodiments of the present invention are related to a hair styling device that comprises an optical radiation source for radiating hair, a sensor unit for measuring effects from radiating hair, and a feedforward control device for controlling the optical radiation source in dependence on a signal from the sensor unit.
  • the optical radiation source may produce a first flash having a first energy density that may be lower than required for photo-thermal hair reshaping, the optical radiation source being controlled to produce a subsequent flash in dependence on a sensor signal obtained in response to the first flash, which subsequent flash may have at least the first energy density.
  • the sensor unit may include a sensor arranged before the optical radiation source in a hair flow direction.
  • the hair styling device may comprise, along a direction in which the hair is guided, a first sensor, a first LED unit being controlled in dependence on a signal from the first sensor, a second sensor, and a second LED unit being controlled in dependence on a signal from the second sensor.
  • the direction in which hair is guided through the hair styling device may determine which part of the optical radiation source will act as the first LED unit.
  • the hair styling device may comprise a drive mechanism to move the hair along the optical radiation source at a speed controlled by the feedforward control device in dependence on the signal from the sensor unit.
  • embodiments of the present invention are related to a hair styling device having a two-dimensional array of elements to bring hair at a styling temperature, in which the elements produce optical radiation energy.
  • the elements may include one or more LEDs, and preferably a plurality of LEDs, in which case the LEDS are driven in clusters that may be of mutually different shapes and sizes.
  • the hair styling device may comprise sensors to obtain an areal light absorption measurement opposed to the two-dimensional array of elements, and a control unit for individually controlling the elements in dependence of the measurement.
  • the hair styling device may radiate hair from two sides, both of which includes an areal light absorption measurement.
  • the sensors may include LEDs that momentarily do not produce light.
  • a control unit for controlling the optical radiation source may be implemented by means of hardware comprising several distinct elements, and/or by means of a suitably programmed processor.

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  • Radiation-Therapy Devices (AREA)
EP17190265.3A 2017-09-10 2017-09-10 Haarstylingvorrichtung Withdrawn EP3453282A1 (de)

Priority Applications (11)

Application Number Priority Date Filing Date Title
EP17190265.3A EP3453282A1 (de) 2017-09-10 2017-09-10 Haarstylingvorrichtung
RU2020113294A RU2770720C2 (ru) 2017-09-10 2018-08-31 Устройство для укладки волос
CN201880072757.8A CN111315253B (zh) 2017-09-10 2018-08-31 毛发造型设备
KR1020207010301A KR102581430B1 (ko) 2017-09-10 2018-08-31 헤어 스타일링 장치
US16/644,535 US20200187618A1 (en) 2017-09-10 2018-08-31 Hair stying device
MX2020002516A MX2020002516A (es) 2017-09-10 2018-08-31 Dispositivo para estilizar cabello.
PL18759140T PL3681334T3 (pl) 2017-09-10 2018-08-31 Urządzenie do stylizacji włosów
EP18759140.9A EP3681334B1 (de) 2017-09-10 2018-08-31 Haarstylingvorrichtung
JP2020513291A JP7012146B2 (ja) 2017-09-10 2018-08-31 毛髪スタイリング装置
PCT/EP2018/073508 WO2019048357A1 (en) 2017-09-10 2018-08-31 HAIRSTOCKING DEVICE
BR112020004486-5A BR112020004486B1 (pt) 2017-09-10 2018-08-31 Dispositivo para fazer penteados

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP17190265.3A EP3453282A1 (de) 2017-09-10 2017-09-10 Haarstylingvorrichtung

Publications (1)

Publication Number Publication Date
EP3453282A1 true EP3453282A1 (de) 2019-03-13

Family

ID=59846450

Family Applications (1)

Application Number Title Priority Date Filing Date
EP17190265.3A Withdrawn EP3453282A1 (de) 2017-09-10 2017-09-10 Haarstylingvorrichtung

Country Status (1)

Country Link
EP (1) EP3453282A1 (de)

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6423942B1 (en) * 2001-09-11 2002-07-23 Nanica-Taiwan Incorporated Portable hair curler having lamp type heat source member
WO2010067323A1 (en) * 2008-12-10 2010-06-17 L'oreal A method of treating a keratinous fiber with light to obtain remanence of its shape prior to irradiation
WO2014108775A1 (en) * 2013-01-11 2014-07-17 Daniel Moyal Hair straightening with vapors
US20150173480A1 (en) * 2013-12-19 2015-06-25 The Procter & Gamble Company Appliance for Shaping Fibrous Material
WO2016042476A1 (en) 2014-09-17 2016-03-24 Koninklijke Philips N.V. Baffle mechanism of hair curler and hair curler having the same
WO2017029382A1 (en) 2015-08-19 2017-02-23 Koninklijke Philips N.V. Automatic hair curler
WO2017080957A1 (en) 2015-11-10 2017-05-18 Koninklijke Philips N.V. Hair care device
EP3216368A1 (de) 2016-03-09 2017-09-13 Koninklijke Philips N.V. Haarstyling

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6423942B1 (en) * 2001-09-11 2002-07-23 Nanica-Taiwan Incorporated Portable hair curler having lamp type heat source member
WO2010067323A1 (en) * 2008-12-10 2010-06-17 L'oreal A method of treating a keratinous fiber with light to obtain remanence of its shape prior to irradiation
WO2014108775A1 (en) * 2013-01-11 2014-07-17 Daniel Moyal Hair straightening with vapors
US20150173480A1 (en) * 2013-12-19 2015-06-25 The Procter & Gamble Company Appliance for Shaping Fibrous Material
WO2016042476A1 (en) 2014-09-17 2016-03-24 Koninklijke Philips N.V. Baffle mechanism of hair curler and hair curler having the same
WO2017029382A1 (en) 2015-08-19 2017-02-23 Koninklijke Philips N.V. Automatic hair curler
WO2017080957A1 (en) 2015-11-10 2017-05-18 Koninklijke Philips N.V. Hair care device
EP3216368A1 (de) 2016-03-09 2017-09-13 Koninklijke Philips N.V. Haarstyling

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