Radiation Detection Panel Pixel Segmentation for Offset Correction

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Solution Overview

Problem

General radiation detection devices face challenges in accurately obtaining basic offset information due to dynamic factors like analog-to-digital converter variations and power supply noise, leading to differences between obtained offset and exposure information, and are unable to provide proper correction.

Innovation Solution

A radiation detection device with a detection panel featuring pixels arranged in rows, where some pixels are electrically insulated from the bias line or lack photodiodes, allowing for the effective measurement of background noise to correct radiation detection results.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If general correction mode shields photodiode to avoid exposure influence, then exposure interference is reduced, but dark current and circuit loop defects still contaminate the basic offset information

Engineering Contradiction:

Improvebasic offset information accuracyVSAvoiddark current and circuit loop defects

Core Design Contradiction:

Measurement precisionVSObject-affected harmful factors

Solution Approach 1:

The detection panel is segmented into three distinct pixel rows: first pixel rows without photodiodes for pure circuit noise measurement, second pixel rows with photodiodes connected to bias lines for full signal measurement, and third pixel rows with photodiodes insulated from bias lines for background noise measurement. This segmentation allows separate measurement and subtraction of different noise components to obtain accurate basic offset information.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The first pixel rows serve as intermediary elements that measure only circuit loop noise without photodiode contributions. These intermediary measurements are then used to subtract circuit noise from the measurements of other pixel rows, isolating the photodiode-related offset information.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Reliability

If all pixels include photodiodes to maintain detection functionality, then radiation detection capability is preserved, but inability to isolate circuit loop noise prevents accurate offset measurement

Engineering Contradiction:

Improveradiation detection capabilityVSAvoidoffset information accuracy

Core Design Contradiction:

ReliabilityVSMeasurement precision

Solution Approach 1:

Different regions of the detection panel are assigned different local qualities: first pixel rows have no photodiodes (circuit-only measurement), second pixel rows have connected photodiodes (full measurement), and third pixel rows have insulated photodiodes (background noise measurement). This local differentiation enables precise isolation and measurement of various noise components.

Inventive Principle:

Principle #3Local quality

3Reliability

If pixels are electrically connected to bias line to maintain proper photodiode operation, then photodiode functionality is ensured, but bias line noise contaminates background noise measurement

Engineering Contradiction:

Improvephotodiode operationVSAvoidbackground noise measurement

Core Design Contradiction:

ReliabilityVSMeasurement precision

Solution Approach 1:

The pixel array is segmented into groups with different bias line connections. Third pixel rows specifically have photodiodes electrically insulated from bias lines, creating a separate measurement channel that captures background noise without bias line contamination, while other rows maintain normal bias line connections for full functionality.

Inventive Principle:

Principle #1Segmentation

Applied Scientific Principles

This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.

Function Achieved in This Case

Enables the accurate correction of radiation detection results by isolating and measuring background noise, reducing the influence of dynamic factors and providing proper offset information.

Implementation Method 1

Each of the plurality of second pixels and the plurality of other second pixels includes a photodiode

Methodology Applied

Scientific EffectPhotoelectric effect: Photoelectric Effect

Data Source

PatentUS11874410B2Radiation detection device

Publication Date: 2024.01.16 INNOCARE OPTOELECTRONICS CORP

AI summary

A radiation detection device, including a detection panel, is provided. The detection panel includes multiple first pixels, arranged into a first row in an extending direction of a data line; multiple second pixels, arranged into a second row in the extending direction of the data line; and multiple other second pixels, arranged into a third row in the extending direction of the data line. Each of the multiple first pixels includes a first switch. Each of the multiple second pixels and the multiple other second pixels includes a second switch. Each of the multiple second pixels and the multiple other second pixels includes a photodiode. The multiple first pixels do not include a photodiode. That is, compared with the multiple first pixels, each of the multiple second pixels further includes the photodiode electrically connected with the second switch.