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US 11,887,402 B2Granted
Fingerprint sensor and display device including the same
AssigneeSamsung Display Co., Ltd.
InventorsYoung Ok Park, Jun Woo You, Byung Hoon Kim, June Hyoung Park
Life of this patent
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Abstract
A fingerprint sensor includes: a light sensing layer including 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 including a light guide unit guiding light to the light sensing element. The light guide unit includes: 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.
Claims18
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.
7 more elements
A display device comprising:
- a display panel configured to display an image;
- and
- a fingerprint sensor disposed on a surface of the display panel and configured to sense light passing through the display panel,
- wherein the fingerprint sensor comprises:
- a light sensing layer comprising a light sensing element, wherein a sensing current flows in the light sensing element according to received light;
- and
- a collimator layer disposed on the light sensing layer and comprising a light guide unit guiding light to the light sensing element, and
- 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.
12 more elements
Dependencies are inferred from the claim text.