Light source device and electronic apparatus

A light source device, comprising:

• a substrate including a first surface and a second surface opposite to the first surface;
• an electrode layer disposed on the first surface of the substrate;
• a surrounding frame disposed on the first surface;
• a light emitter and a light detector mounted on the electrode layer and spaced apart from each other, and located on an inner side of the surrounding frame;
• and
• a light permeable member disposed on the surrounding frame and covering the light emitter and the light detector,
• wherein when the light emitter receives a predetermined current, the light emitter emits an invisible light toward the light permeable member, and the light detector receives a part of the invisible light reflected from the light permeable member so as to generate an initial photocurrent,
• wherein when the light emitter receives a manipulation current so that a detection photocurrent generated from the light detector is less than a first ratio of the initial photocurrent or greater than a second ratio of the initial photocurrent, the light emitter stops receiving the manipulation current.