Patent RU-2707365-C2 (RU)
Title: System and method for light therapy and circadian rhythm variation
Inventor: KOLBO Majkl Edvard
IPC: A61N5/06
Filed: 2014-07-23
Granted: 2019-11-26
Abstract: FIELD: medicine. 
     SUBSTANCE: system for conducting light therapy with respect to a subject and a method of controlling emission of electromagnetic radiation relate to medicine, namely to physiotherapy, and can be used for light therapy and control of emission of electromagnetic radiation. Light therapy system for a subject having S-cone receptors comprises a light source, one or more processing devices. Light source is configured to emit electromagnetic radiation containing electromagnetic radiation. Electromagnetic radiation has first intensity and second intensity. Electromagnetic radiation emitted at the first intensity is used to stimulate the S-cone receptors of the subject under the action and is characterized by the fact that at least 90 % of the spectral power density lies in 450–510 nm band, and not more than 10 % of power spectral density is in band of more than 510 nm. Emitted electromagnetic radiation consists of electromagnetic radiation in the wave band with width of up to 70 nm. Second intensity is lower than the first intensity. Processing units are configured to execute computer program modules comprising a light control module. Light control module is configured to control the light emission by the light source for light therapy with respect to the subject such that the electromagnetic radiation has a pulse duration of up to approximately 10 minutes and a pulse interval of approximately 0.1 seconds to approximately 10 minutes. Light control module is configured to control the light emission by the light source for light therapy with respect to the subject as a response to a result of determining that one or more eyes of the subject are closed and/or a result of determining that the subject is in a sleep state or specific stage of sleep. Subject has a circadian rhythm, and light therapy for the subject shifts the circadian rhythm of the subject. Method for controlling emission of electromagnetic radiation, which acts on a subject having S-cone receptors, according to which emitter is emitted by a light source, wherein control of light emission by a light source for light therapy with respect to a subject is carried out by a reaction to the determination that one or more eyes of the subject are closed and/or to determine that the subject is in a sleep state or at a specific sleep stage. Subject has a circadian rhythm, and light therapy for the subject shifts the circadian rhythm of the subject. Emitted electromagnetic radiation comprises electromagnetic radiation having a first intensity and a second intensity. Electromagnetic radiation emitted at a first intensity is used to stimulate the S-cone receptors of the subject under exposure and is characterized by that not less than 90 % of the spectral power density lies in 450–510 nm band, and not more than 10 % of power spectral density is in band of more than 510 nm. Emitted electromagnetic radiation consists essentially of electromagnetic radiation in the range of waves with width of up to 70 nm. Second intensity is lower than the first intensity. Emission of electromagnetic radiation is controlled so that electromagnetic radiation has pulse duration of up to approximately 10 minutes and duration of pulse interval from approximately 0.1 seconds to approximately 10 minutes. 
     EFFECT: group of inventions provides the possibility of treating the circadian rhythm disturbance by the colour therapy. 
     10 cl, 10 dwg