Biological information detector and biological information measurement device

Abstract

A biological information detector includes a light-emitting part, a reflecting part, and a light-receiving part. The light-emitting part is configured and arranged to emit light directed at a detection site of a test subject. The reflecting part is arranged at the periphery of the light-emitting part. The light-receiving part is configured and arranged to receive reflected light at the detection site including biological information. The light-emitting part and the light-receiving part are arranged not to overlap each other in plan view. A distance between the detection site and the light-emitting part is different from a distance between the detection site and the light-receiving part.

What is claimed is: 
     
         1 . A biological information detector comprising:
 a light-emitting part configured and arranged to emit light directed at a detection site of a test subject;   a reflecting part arranged at the periphery of the light-emitting part; and   a light-receiving part configured and arranged to receive reflected light at the detection site including biological information, wherein   the light-emitting part and the light-receiving part are arranged not to overlap each other in plan view, and   a distance between the detection site and the light-emitting part is different from a distance between the detection site and the light-receiving part.   
     
     
         2 . The biological information detector according to  claim 1 , wherein
 the reflecting part includes a first reflecting part which surrounds the light-emitting part.   
     
     
         3 . The biological information detector according to  claim 1 , wherein
 the light-emitting part has a quadrangular shape, and at least one side of the quadrangular shape is 100 μm to 10000 μm.   
     
     
         4 . The biological information detector according to  claim 1 , wherein
 the light-receiving part has a quadrangular shape.   
     
     
         5 . The biological information detector according to  claim 1 , further comprising
 a protector arranged on the side of the detection site of at least one of the light-receiving part and the light-emitting part.   
     
     
         6 . The biological information detector according to  claim 1 , wherein
 the light-receiving part, the light-emitting part, and the reflecting part are arranged on a single substrate.   
     
     
         7 . The biological information detector according to  claim 1 , wherein
 the light-emitting part emits light whose maximum value of intensity is in a wavelength range from 425 nm to 625 nm.   
     
     
         8 . The biological information detector according to  claim 5 , wherein
 the protector has an optical filter which cuts a predetermined wavelength.   
     
     
         9 . The biological information detector according to  claim 8 , wherein
 the optical filter is an infrared-cutting filter.   
     
     
         10 . The biological information detector according to  claim 1 , wherein
 at least a part of the reflecting part is formed in a curved shape in plan view.   
     
     
         11 . The biological information detector according to  claim 1 , wherein
 an area of the reflecting part is larger than an area of the light-emitting part in plan view.   
     
     
         12 . The biological information detector according to  claim 1 , wherein
 an area of the light-receiving part is larger than an area of the light-emitting part in plan view.   
     
     
         13 . The biological information detector according to  claim 1 , wherein
 the light-emitting part is arranged above the reflecting part.   
     
     
         14 . The biological information detector according to  claim 13 , wherein
 the reflecting part has a concave portion and a reflecting member arranged on a bottom portion of the concave portion, and   the light-emitting part is arranged above the reflecting member.   
     
     
         15 . The biological information detector according to  claim 1 , wherein
 the reflectivity of the reflecting part is 80 to 90%.   
     
     
         16 . The biological information detector according to  claim 1 , further comprising
 an acceleration rate sensor.   
     
     
         17 . A biological information measurement device comprising:
 the biological information detector according to  claim 1 ; and   a biological information measurement unit for measuring biological information on the basis of signals generated in a first light-receiving part and signals generated in a second light-receiving part.   
     
     
         18 . The biological information measurement device according to  claim 17 , wherein
 the biological information is a pulse count.   
     
     
         19 . The biological information measurement device according to  claim 17 , further comprising
 a motherboard, wherein   the biological information detector and the motherboard are connected with a flexible board.