US 2020/0029048 A1 · OPTICAL DETECTION PIXEL UNIT, OPTICAL DETECTION CIRCUIT, OPTICAL DETECTION METHOD AND DISPLAY DEVICE

Abstract

The present disclosure provides an optical detection pixel unit, an optical detection pixel circuit, an optical detection method and a display device. The optical detection pixel unit comprise a photosensitive element and a detection transistor, wherein the photosensitive element has a first electrode connected with a photovoltage terminal, and a second electrode connected with a gate of the detection transistor; the photosensitive element is configured to detect an optical signal under the control of the photovoltage terminal; and the detection transistor has a first electrode connected with a detection voltage line, and a second electrode connected with a reading line.

Claims19

Dependent claims

An optical detection pixel unit, comprising a photosensitive element and a detection transistor, wherein

the photosensitive element has a first electrode connected with a photovoltage terminal, and a second electrode connected with a gate of the detection transistor;
and
the detection transistor has a first electrode connected with a detection voltage line, and a second electrode connected with a reading line.

An optical detection circuit, comprising N rows of detection voltage lines, M columns of reading lines, and optical detection pixel units arranged in N rows and M columns;

the optical detection pixel unit in the nth row and the mth column comprises a photosensitive element in the nth row and the mth column and a detection transistor in the nth row and the mth column, wherein
the photosensitive element in the nth row and the mth column has a first electrode connected with an nth photovoltage terminal, and a second electrode connected with a gate of the detection transistor in the nth row and the mth column;
the detection transistor in the nth row and the mth column has a first electrode connected with a detection voltage line in the nth row, and a second electrode connected with a reading line in the mth column;
an mth current source is connected with the reading line in the mth column for providing an mth constant current for the reading line in the mth column;
and
both N and M are positive integers, n is a positive integer less than or equal to N, and m is a positive integer less than or equal to M.

3 more elements

Dependencies are inferred from the claim text.

Facts

Application

16/454,281Filed 27 Jun 2019

Priority

CN 201810782411.917 Jul 2018

Published

23 Jan 2020

Term ends

Not estimatedThe source records don’t support an estimate.

Classification9 codes

H10F 39/8037
Pixels having integrated switching, control, storage or amplification elements: the integrated elements comprising a transistor
H04N 25/76
SSIS architectures; Circuits associated therewith: addressed sensors, e.g. MOS or CMOS sensors
H04N 25/77
Addressed sensors, e.g. MOS or CMOS sensors: pixel circuitry, e.g. memories, A/D converters, pixel amplifiers, shared circuits or shared components
H04N 25/78
Addressed sensors, e.g. MOS or CMOS sensors: readout circuits for addressed sensors, e.g. output amplifiers or A/D converters

Optical detection pixel unit, optical detection circuit, optical detection method and display device

Life of this patent

Optical detection pixel unit, optical detection circuit, optical detection method and display device

Life of this patent

Abstract

Claims19