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Abstract

An illumination system comprises a 1st signal generator to generate signals with a frequency range of the alpha rhythms of human brain waves, a 2nd signal generator to generate signals with a power spectrum distribution expressed by 1/f.sup.n, where n is between 0 and 2, and also with a frequency range below 50 Hz, a driver amplifier a and a driver amplifier b, both serving as light controllers to control the illumination of light sources according to the signals from the 1st and 2nd signal generators respectively and finally a light source 1 and a light source 2 to shed lights, and contributes to inducing a person under the light shedding from it to generate alpha rhythms without having an uncomfortable impression due to flickering illumination in a readily available illumination environment. Thus, the illumination from the light source 1 contributes to the entrainment of alpha rhythms and that from the light source 2 contributes to masking the illumination from the light source 1 eliminating the unpleasant flickering impression with a resultant ready creation of an illumination environment wherein alpha rhythms are induced. If necessary, it is possible to enhance the alpha rhythm entrainment effect by using sounds and also it is possible to apply a bio-feedback for stabilizing and intensifying the alpha rhythms through a brain wave feedback loop formed visually and/or acoustically, if necessary, with the analyzed signals of the brain waves from a person under the illumination environment used as the control signals for the 1st signal generator.

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First Claim