X-Ray Sensor Wavelength Conversion Layer for Spectral Matching

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Solution Overview

Problem

The light conversion efficiency of X-ray detection devices is poor due to a mismatch between the emission spectrum peak of the scintillator layer and the absorption response spectrum peak of the sensor.

Innovation Solution

Incorporating a wavelength conversion layer between the scintillator layer and the sensor to convert visible light emitted by the scintillator layer into a wavelength closer to the absorption response spectrum peak of the sensor, thereby improving light conversion efficiency.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Loss of energy

If a scintillator layer is used to convert X-ray into visible light, then X-ray detection is enabled, but the light conversion efficiency is poor due to spectrum mismatch

Engineering Contradiction:

Improvelight conversion efficiencyVSAvoidspectrum matching accuracy

Core Design Contradiction:

Loss of energyVSReliability

Solution Approach 1:

A wavelength conversion layer is introduced as an intermediary between the scintillator layer and the sensor. This layer converts the visible light from the scintillator (peak wavelength 480nm) into a wavelength closer to the sensor's absorption peak (520nm), thereby improving light conversion efficiency without changing the scintillator material itself.

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The patent changes the wavelength parameter of the light by introducing a wavelength conversion layer with specific optical properties. The conversion layer has an emission spectrum peak at 520nm that matches the sensor's absorption response spectrum peak, optimizing the energy transfer efficiency.

Inventive Principle:

Principle #35Parameter changes

2Device complexity

If the emission spectrum peak of scintillator layer does not match the absorption response spectrum peak of sensor, then device structure is simple, but light conversion efficiency is poor

Engineering Contradiction:

Improvelayer structure complexityVSAvoidlight conversion efficiency

Core Design Contradiction:

Device complexityVSLoss of energy

Solution Approach 1:

The wavelength conversion layer serves as a mediator that bridges the spectral mismatch between the scintillator and sensor. It receives light from the scintillator layer and converts it to a wavelength optimized for sensor absorption, improving efficiency while maintaining a relatively simple three-layer structure.

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The patent employs composite material strategies by combining the scintillator layer material with a wavelength conversion layer material that has complementary optical properties. The conversion layer uses materials with emission spectrum peak at 520nm to match the sensor's absorption characteristics.

Inventive Principle:

Principle #40Composite materials

3Loss of energy

If wavelength conversion layer is added to improve light conversion efficiency, then spectrum matching improves, but device structure becomes more complex

Engineering Contradiction:

Improvelight conversion efficiencyVSAvoidnumber of layers

Core Design Contradiction:

Loss of energyVSDevice complexity

Solution Approach 1:

The wavelength conversion layer is positioned as an intermediary between the scintillator and sensor, performing the dual function of receiving light from the scintillator and converting it to an optimized wavelength for the sensor, thereby improving efficiency with minimal structural complexity.

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The patent optimizes the thickness and optical properties of the wavelength conversion layer to achieve the best balance between improving light conversion efficiency and maintaining structural simplicity. The layer thickness is controlled to ensure effective wavelength conversion without excessive complexity.

Inventive Principle:

Principle #35Parameter changes

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

Enhances the light conversion efficiency of the sensor by aligning the emission spectrum peaks, allowing for better material selection and stability of the scintillator layer, and facilitating easier thickness modulation.

Implementation Method 1

The X-ray detection device may convert an X-ray into visible light using a scintillator layer

Methodology Applied

Scientific EffectScintillation: Scintillation

Implementation Method 2

The wavelength conversion layer is disposed between the scintillator layer and the sensor

Methodology Applied

Scientific EffectWavelength conversion: Fluorescence

Implementation Method 3

receive the visible light using a sensor for subsequent image processing

Methodology Applied

Scientific EffectPhotoelectric effect: Photoelectric Effect

Data Source

PatentUS20250321340A1Electronic device

Publication Date: 2025.10.16 INNOCARE OPTOELECTRONICS CORP

AI summary

An electronic device includes a sensor, a scintillator layer, and a wavelength conversion layer. The scintillator layer is disposed on the sensor. The wavelength conversion layer is disposed between the scintillator layer and the sensor.