DEVICE FOR RELIEVING DEMENTIA SYMPTOMS

1 . A device for relieving dementia symptoms, comprising:

a first light stimulation part disposed at a location within a preset radius from an eyeball and frontal lobe of a patient and configured to radiate light having a preset wavelength band to an optic nerve and frontal lobe of the patient;

an acoustic stimulation part configured to stimulate a brain of the patient by outputting a sonorant having a gamma frequency band;

a second light stimulation part mounted within a location within the preset radius from the eyeball and frontal lobe of the patient and configured to radiate, to an optic nerve and frontal lobe of the patient, light having a wavelength band different from the preset wavelength band;

a first light-receiving part disposed within a preset radius along with the light stimulation part and configured to receive light that is reflected by an artery within a skin of the patient after being radiated by the light stimulation part;

a plurality of second light-receiving parts disposed outside a preset radius along with the light stimulation part and configured to receive light that is reflected by the frontal lobe of the patient after being radiated by the light stimulation part; and

a controller configured to control an operation of the first light stimulation part, the second light stimulation part, and the acoustic stimulation part,

wherein some of the plurality of second light-receiving parts are disposed to be directed toward a left brain of the patient and remaining second light-receiving parts thereof are disposed to be directed toward a right brain of the patient so that the second light-receiving parts are able to receive all of reflected light reflected by the left brain and the right brain, and

the controller synchronizes and outputs an optical signal that is output by the light stimulation part and an acoustic signal that is output by the acoustic stimulation part.

2 . The device of claim 1 , wherein the preset wavelength band is a near-infrared ray wavelength band.

3 . The device of claim 1 , wherein the light stimulation part comprises:

a first light stimulation part configured to radiate light having a wavelength band within a preset range on the basis of 730 nm, and

a second light stimulation part configured to radiate light having a wavelength band within a preset range on the basis of 850 nm.

4 . The device of claim 1 , wherein the light stimulation part radiates light having a preset frequency band.

5 . The device of claim 4 , wherein the controller is capable of changing the frequency band of the light radiated by the light stimulation part into a second preset frequency band.

6 . The device of claim 5 , further comprising a first light-receiving part disposed within a preset radius from the light stimulation part and configured to receive light that is radiated to have the second preset frequency band from the light stimulation part and that is reflected by an artery within a skin of the patient.

7 . The device of claim 6 , wherein the controller measures a heart rate and oxygen saturation of the patient based on information received by the first light-receiving part.

8 . The device of claim 5 , further comprising a second light-receiving part disposed outside a preset radius from the light stimulation part and configured to receive light that is radiated to have the second preset frequency band from the light stimulation part and that is reflected by the frontal lobe of the patient.

9 . The device of claim 8 , wherein the controller measures a patient's brain oxygen saturation based on information received by the second light-receiving part.

10 . The device of claim 8 , wherein the second light-receiving part is included in a plural number.