公开(公告)号：US20240151580A1

公开(公告)日：2024-05-09

申请号：US17981497

申请日：2022-11-07

Applicant: Japan Display Inc.

Inventor： Chungkai CHEN ,  Naoki TAKADA

IPC: G01J1/44

CPC classification number: G01J1/44

Abstract: A light sensing apparatus includes a pixel array including Thin Film Transistors (TFTs) and an interface integrated circuit including silicon transistors. The pixel array includes a plurality of pixel circuits. Each of the plurality of pixel circuits includes a light sensitive device and a detection TFT connected to the light sensitive device. The pixel array may also include a plurality of correlated double sampling (CDS) circuits each including a current source configured to provide current that biases a detection TFT in one of the pixel circuits to be configured as a source-follower. The interface integrated circuit includes at least one receiver circuit configured to receive an output of at least one of the CDS circuits. The CDS circuits may also include a bypass TFT, and the interface integrated circuit may also include a current source that provides current that biases a detection TFT in one of the pixel circuits to be configured as a source-follower when the bypass TFT is active.

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.