US 11,872,014 B2
Optical detection device for physiological characteristic identification
Cheng-Nan Tsai, Hsin-Chu (TW)
Assigned to PixArt Imaging Inc., Hsin-Chu (TW)
Filed by PixArt Imaging Inc., Hsin-Chu (TW)
Filed on Dec. 28, 2021, as Appl. No. 17/564,143.
Application 17/564,143 is a continuation of application No. 16/202,022, filed on Nov. 27, 2018, granted, now 11,284,799.
Prior Publication US 2022/0117490 A1, Apr. 21, 2022
Int. Cl. A61B 5/00 (2006.01); A61B 5/1455 (2006.01)
CPC A61B 5/0059 (2013.01) [A61B 5/14552 (2013.01); A61B 2560/0252 (2013.01); A61B 2562/0233 (2013.01); A61B 2562/0271 (2013.01)] 4 Claims
OG exemplary drawing
 
1. An optical detection device for physiological characteristic identification, comprising:
a first light source adapted to emit a first optical signal towards a target object;
a second light source adapted to emit a second optical signal towards the target object;
a third light source adapted to emit a third optical signal towards the target object, the second light source being symmetrically disposed between the first light source and the third light source; and
an optical receiver adapted to receive and simultaneously analyze the first optical signal, the second optical signal and the third optical signal simultaneously reflected from the target object for acquiring the physiological characteristic identification of the target object;
wherein the first light source, the second light source and the third light source are light emitting diodes and emit the optical signals having wavelengths different from each other.