US 11,741,740 B2
Fingerprint sensor, method of fabricating the same, and display device including the same
Jae Ik Lim, Hwaseong-si (KR); Ji Hye Kim, Asan-si (KR); and Byung Han Yoo, Suwon-si (KR)
Assigned to SAMSUNG DISPLAY CO., LTD., Yongin-si (KR)
Filed by SAMSUNG DISPLAY CO., LTD., Yongin-si (KR)
Filed on Apr. 20, 2021, as Appl. No. 17/235,359.
Claims priority of application No. 10-2020-0058812 (KR), filed on May 18, 2020.
Prior Publication US 2021/0357613 A1, Nov. 18, 2021
Int. Cl. G06V 40/13 (2022.01); H10K 59/40 (2023.01); H10K 71/00 (2023.01)
CPC G06V 40/1318 (2022.01) [H10K 59/40 (2023.02); H10K 71/00 (2023.02)] 26 Claims
OG exemplary drawing
 
1. A fingerprint sensor, comprising:
a light sensing layer comprising a light sensing element; and
a light guide layer disposed on the light sensing layer,
wherein the light guide layer comprises:
a plurality of first light-transmitting films;
a light-blocking film disposed between neighboring light-transmitting films of the plurality of first light-transmitting films; and
a second light-transmitting film disposed between each of the plurality of first light-transmitting films and the light-blocking film,
wherein the second light-transmitting film is a single, continuous film,
wherein the second light-transmitting film is disposed on a top surface of each of the plurality of first light-transmitting films and a lower surface of the light-blocking film,
wherein the second light-transmitting film is disposed between a side surface of each of the plurality of first light-transmitting films and a side surface of the light-blocking film, and
wherein the second light-transmitting film is not disposed on a lower surface of each of the plurality of first light-transmitting films and a top surface of the light-blocking film.