US 11,694,466 B2
Biometric verification device
Hsun-Chen Chu, Hsinchu (TW)
Assigned to Au Optronics Corporation, Hsinchu (TW)
Filed by Au Optronics Corporation, Hsinchu (TW)
Filed on Mar. 9, 2022, as Appl. No. 17/689,991.
Claims priority of provisional application 63/189,960, filed on May 18, 2021.
Claims priority of application No. 110139384 (TW), filed on Oct. 22, 2021.
Prior Publication US 2022/0375248 A1, Nov. 24, 2022
Int. Cl. G06V 40/13 (2022.01); H01L 27/146 (2006.01); F21V 8/00 (2006.01)
CPC G06V 40/13 (2022.01) [G02B 6/003 (2013.01); H01L 27/14678 (2013.01)] 16 Claims
OG exemplary drawing
 
1. A biometric verification device, comprising:
a backlight module;
a photodetector, disposed on the backlight module;
a switching element, disposed on the backlight module, and electrically connected with the photodetector; and
at least one collimation structure, disposed on the backlight module, and having a first pinhole and a second pinhole therein,
wherein horizontal projections of the first pinhole and the second pinhole on the backlight module do not overlap with a horizontal projection of the photodetector on the backlight module,
wherein the first pinhole and the second pinhole are defined by a first collimation layer and a second collimation layer, respectively, and a ratio of a distance between the first pinhole and the second pinhole in a normal direction of the first collimation layer to a width of one of the first pinhole and the second pinhole falls within a range of 5 to 10.