Patent ID: 11887402
Assignee: SAMSUNG ELECTRONICS CO., LTD.
Field: Computer technology (Electrical engineering)
Classification: CPC G  H | IPC G  H

Claim 0:
1. A fingerprint sensor comprising:
a light sensing layer comprising a light sensing element, wherein a sensing current flows in the light sensing element according to incident light; and
a collimator layer disposed on the light sensing layer and comprising a light guide unit guiding light to the light sensing element,
wherein the light guide unit comprises:
a light-transmitting unit configured to provide light to the light sensing element; and
a first light-blocking unit disposed on an inner surface of the light-transmitting unit, wherein a height of the first light-blocking unit is different from a height of the light-transmitting unit,

wherein a distance between a first outer surface of the light-transmitting unit and the inner surface of the light transmitting unit decreases as the light sensing layer is approached,
wherein a lowermost portion of the first light-blocking unit overlaps a lowermost portion of the light-transmitting unit in a thickness direction of the first light-blocking unit, wherein the lowermost portion of the first light-blocking unit is spaced apart from the lowermost portion of the light-transmitting unit in the thickness direction,
wherein the lowermost portion of the first light-blocking unit is a first vertex formed by a first side surface of the first light-blocking unit and a second side surface of the first-light blocking unit, and the lowermost portion of the light-transmitting unit is a second vertex formed by the first outer surface and a second outer surface of the light-transmitting unit.