Light radiation device for medical treatment

Abstract

A light radiation device includes a housing, a substrate provided in the housing, and a light source mounted on the substrate. The light source includes a first light source including at least one first light source to emit first light having a blue wavelength band, a second light source including at least one second light source to emit second light having a ultraviolet wavelength band, and a control unit to control the first light source and the second light source such that the second light source sequentially emits the second light after the first light source emits the first light. A dose of the second light source is less than 1/10 of a dose of the first light source.

We claim: 
     
         1 . A light radiation device comprising:
 a housing;   a substrate provided in the housing; and   a light source mounted on the substrate,   wherein the light source includes:
 a first light source including at least one first light source and configured to emit first light having a blue wavelength band; 
 a second light source including at least one second light source and configured to emit second light having a ultraviolet wavelength band; and 
 a control unit that controls light emission of the first light source and the second light source such that the first light and the second light are emitted sequentially, or at timings close to each other, regardless of whether emission of the first light overlaps with emission of the second light, or not, and 
   wherein a dose of the second light source is less than 1/10 of a dose of the first light source.   
     
     
         2 . The light radiation device of  claim 1 , wherein the control unit controls the first light source and the second light source to emit the second light after starting to emit the first light. 
     
     
         3 . The light radiation device of  claim 1 , wherein the second light corresponds to at least one of UVA (ultraviolet A), UVB (ultraviolet B), and UVC (Ultraviolet C) wavelength bands. 
     
     
         4 . The light radiation device of  claim 2 , wherein the first light has a wavelength band in a range of about 400 nm to about 500 nm. 
     
     
         5 . The light radiation device of  claim 1 , wherein the first light further includes light having a wavelength band corresponding to a visible light. 
     
     
         6 . The light radiation device of  claim 5 , wherein the first light has a wavelength band in a range of about 380 nm to about 780 nm. 
     
     
         7 . The light radiation device of  claim 1 , wherein the second light has a wavelength band in a range of about 240 nm to about 280 nm. 
     
     
         8 . The light radiation device of  claim 7 , wherein the first light is irradiated for a first time, and the second light is irradiated for a second time shorter than the first time. 
     
     
         9 . The light radiation device of  claim 8 , wherein the second light starts to be irradiated after the first light stops irradiation. 
     
     
         10 . The light radiation device of  claim 8 , wherein the second light starts to be irradiated before the first light stops irradiation, and at least a portion of the first time and the second time has a mutually overlapping duration. 
     
     
         11 . The light radiation device of  claim 8 , wherein the first light is continuously irradiated. 
     
     
         12 . The light radiation device of  claim 8 , wherein the second light is discontinuously irradiated. 
     
     
         13 . The light radiation device of  claim 8 , wherein the second light is periodically irradiated. 
     
     
         14 . The light radiation device of  claim 1 , wherein the light radiation device is used to treat a human body. 
     
     
         15 . The light radiation device of  claim 14 , wherein the light radiation device is used to treat acute wound. 
     
     
         16 . The light radiation device of  claim 1 , wherein the second light source emits the second light within a predetermined dose per day, and the predetermined dose per day is in a harmless range to be an allowable dose when the second light is applied to a human body. 
     
     
         17 . The light radiation device of  claim 16 , wherein the second light is irradiated with a dose in a range of about 30 J/m 2  to about 1,000,000 J/m 2 . 
     
     
         18 . A light radiation device for treating a wound, wherein the light irradiation device comprises:
 a first light source including at least one first light source and configured to emit first light in a blue wavelength band;   a second light source including at least one second light source and configured to emit second light in a ultraviolet wavelength band; and   a control unit that controls the first light source and the second light source such that the second light source sequentially emits the second light after the first light source emits the first light,   wherein a dose of the second light source is less than 1/10 of a dose of the first light source.   
     
     
         19 . The light radiation device of  claim 18 , wherein the first light has a wavelength band in a range of about 400 nm to about 500 nm, and
 wherein the second light has a wavelength band in a range of about 240 nm to about 280 nm.   
     
     
         20 . The light radiation device of  claim 19 , wherein the first light is irradiated for a first time, and
 the second light is irradiated for a second time shorter than the first time.