US 11,657,641 B2
Biometric sensing device and display apparatus including same
Yu-Tsung Liu, Miao-Li County (TW); and Te-Yu Lee, Miao-Li County (TW)
Assigned to Innolux Corporation, Miaoli County (TW)
Filed by Innolux Corporation, Miao-Li County (TW)
Filed on Jan. 11, 2022, as Appl. No. 17/573,622.
Claims priority of application No. 202110187545.8 (CN), filed on Feb. 18, 2021.
Prior Publication US 2022/0262157 A1, Aug. 18, 2022
Int. Cl. G06V 40/13 (2022.01); H01L 27/146 (2006.01)
CPC G06V 40/1318 (2022.01) [H01L 27/14678 (2013.01)] 16 Claims
OG exemplary drawing
 
1. A biometric sensing device, comprising:
a first thin film transistor, having a gate;
a second thin film transistor, having a semiconductor layer and a non-gate electrode terminal, wherein the non-gate electrode terminal is electrically connected to the gate of the first thin film transistor; and
a photodiode, contacting the semiconductor layer, wherein the photodiode comprises a doped semiconductor material layer contacting the semiconductor layer and a doping concentration of a portion of the semiconductor layer contacting the doped semiconductor material layer is greater than a doping concentration of the doped semiconductor material layer.