A method for detecting physiological characteristic(s), includes: providing at least one light emitting unit configuring the light emitting unit at a first plane to emit light to a skin surface position on a body part of a user providing at least one light sensing circuit configuring the light sensing circuit at a second plane to receive a sensing result of Photoplethysmography (PPG) signal from another skin surface position of the body part and generating a physiological characteristic(s) detection result according to the sensing result the first plane is different from the second plane, and the two plans forms a substantial angle.一種光學生理特徵偵測方法,包括:提供至少一光射出單元;設置至少一光射出單元於第一平面,發射光線至使用者之待測身體部位的皮膚表面位置;提供至少一光感測電路;設置該至少一光感測電路於第二平面,接收該光線從使用者之待測身體部位的另一皮膚表面位置所穿透出之光電容積脈搏波描記法的感測結果;以及根據該感測結果產生使用者之生理特徵偵測結果;第一平面不同於第二平面,且兩平面彼此形成一實質夾角。105~125‧‧‧步驟
