Panasonic Corporation

Shimane University

Panasonic Electric Works Co., Ltd.

Chosei Hamada

Masato Kinoshita

Takashi Matsuzaki

Masako Yamasaki

Yasuhiro Satou

Kaori Suzuki

Kaname Okuno

Kaori Naganuma

Toshitatsu Nogita

Takehiro Nakagawa

To provide a light irradiation device capable of easily removing and reducing hair with low power light without burden on skin. The light irradiation device according to the present invention includes a light source giving pulses of light in a wavelength range from 400 to 1200 nm and a light guide distributing the pulses of light given from the light source with energy intensity of 0.2 to 10 J/cmat a predetermined distance from the light outgoing surface.

Light irradiation device

A hair-growth adjusting light emitting device includes a device body, a light-emitting unit attached to the device body, and a locking unit for locking the light-emitting unit to the device body. The device body has a main capacitor, a device body connector, an electric power switch, a release switch, and an electric power supplying part. The light-emitting unit has a light-emitting body and a light-emitting body side connector. Furthermore, the hair-growth adjusting light emitting device includes a release restriction mechanism for preventing the light-emitting unit from being released by the release button when the electric power switch is at a power-on position where the electric power supplying part feeds the electric power to the main connector, and a power-on restriction mechanism for preventing the electric power switch from moving to the power-on position when the light-emitting unit is detached from the device body.

Hair-growth adjusting light emitting device

A modulating light having a wavelength of 600 nm to 1000 nm excluding a range of 870 nm to 910 nm is irradiated to a portion around hair roots such that a light absorptive component existing in a human body around the hair roots absorbs the light for modulating hair growth. The light having the wavelength in the above range enhances hair growth free from causing inflammation, yet safely and gentle to skin.

Hair growth modulating method and modulation device thereof

A modulating light having a wavelength of 400 nm to 600 nm is irradiated to a portion around hair roots at an energy of 0.01 J/cmto 1 J/cmover a time period of not more than 1 ms as a flash light such that a light absorptive component existing in a human body around the hair roots absorbs the light for modulating hair growth without causing substantial adverse effect.

A hair growth modulation device is configured to impart a suitable quantity of irradiated light to a target site while lowering the irradiation intensity required by a light irradiator that generates modulating light for modulating hair growth. This device is provided with a hair follicle approximating means that causes hair follicles of body hairs at the target site to approach the skin surface, thereby enhancing the irradiation efficiency of modulating light irradiated to the hair follicles.

Growing community of inventors

Kadoma, Japan

Chosei Hamada