公开(公告)号：US20250022892A1

公开(公告)日：2025-01-16

申请号：US18350031

申请日：2023-07-11

Applicant: Japan Display Inc.

Inventor： Xingle WANG ,  Chungkai CHEN ,  Naoki TAKADA

IPC: H01L27/144

Abstract: An optical sensor system includes a thin-film transistor (TFT) optical panel including an array of TFT pixels, a charge amplifier configured to temporarily store a charge received from a TFT pixel in the array of TFT pixels and generate a voltage based on the temporarily stored charge, an analog-to-digital converter to generate a digitized value based on the voltage, an accumulator configured to store the digitized value, and a controller circuit configured to cause the temporarily stored charge in the charge amplifier to be reset based on one of the voltage and the digitized value.

公开(公告)号：US20240125647A1

公开(公告)日：2024-04-18

申请号：US17967898

申请日：2022-10-18

Applicant: Japan Display Inc.

Inventor： Naoki TAKADA ,  Xingle WANG ,  Chung-Kai CHEN

IPC: G01J1/44 ,  G01J1/46

CPC classification number: G01J1/44 ,  G01J1/46 ,  G01J2001/446 ,  G01J2001/448

Abstract: According to one embodiment, a sensor device comprises a sensor configured to output a sense signal, a value the sense signal changing over time based on incident light, a first reset circuit configured to set the value of the sense signal to a reset value when the value of the sense signal exceeds a threshold, a counter configured to count a first number of times of reset by the first reset circuit, and an arithmetic operation circuit configured to calculate an amount of incident light of a certain period based on the value of the sense signal, the reset value, and the first number of times of reset.