Optical Fingerprint Sensor and Electronic Device Having Same

An electronic device, comprising:

• a housing;
• a display screen arranged to the housing and defining a mounting space together with the housing;
• a cover plate arranged to the housing, stacked with the display screen and located on a side of the display screen facing away from the mounting space;
• an optical fingerprint sensor, comprising:
• a light-sensing element comprising:
• a light-sensing base layer having a plurality of grooves formed in a side surface thereof;
• a plurality of first light-sensing layers configured to receive visible light, and corresponding to the plurality of grooves one to one, each first light-sensing layer being arranged in the corresponding groove;
• and
• a second light-sensing layer configured to receive invisible light, and arranged between an inner wall surface of at least part of the plurality of grooves and an outer wall surface of the first light-sensing layer;
• an optical filter layer stacked with the light-sensing element and located on a side of the light-sensing element where the plurality of grooves are formed;
• and
• an optical lens configured for focusing, stacked with the optical filter layer and located on a side of the optical filter layer facing away from the light-sensing element,
• wherein the optical fingerprint sensor is arranged in the mounting space, and the light-sensing base layer is stacked with the display screen;
• and
• an invisible light emitting layer configured to emit invisible light towards the cover plate, arranged between the optical fingerprint sensor and the cover plate, stacked with the cover plate and the optical fingerprint sensor, and opposite to the optical fingerprint sensor.

An optical fingerprint sensor, comprising:

• a light-sensing element comprising:
• a light-sensing base layer having a groove in a side surface thereof;
• a first light-sensing layer configured to receive visible light and arranged in the groove;
• and
• a second light-sensing layer configured to receive invisible light, and arranged between an inner wall surface of the groove and an outer wall surface of the first light-sensing layer;
• an optical filter layer stacked on a side of the light-sensing element where the groove is formed;
• and
• an optical lens configured for focusing and stacked on a side of the optical filter layer facing away from the light-sensing element.