Active Matrix Image Sensing Device Light Guiding Structures
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Solution Overview
Problem
Traditional X-ray imaging technologies using digital image sensing panels face reduced imaging spatial resolution due to non-directional visible light generated by scintillators, and there is a need for a device with high spatial resolution and flexibility for various applications.
Innovation Solution
An active matrix image sensing device is designed with an image sensing substrate and a scintillator substrate, featuring guiding members, a reflective layer, and scintillator layers to restrict the traveling path of visible light, enhancing spatial resolution and incorporating a flexible substrate for improved flexibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a traditional scintillator layer is used to transform X-ray to visible light, then the X-ray detection function is achieved, but the imaging spatial resolution is reduced due to non-directional visible light
Solution Approach 1:
The scintillator layer is divided into multiple independent light guiding structures, each corresponding to a pixel. This segmentation restricts the propagation of visible light to specific directions, preventing light from spreading to adjacent pixels, thereby improving spatial resolution while maintaining a manageable structural complexity through modular design
Solution Approach 2:
Different regions of the scintillator layer are given different local structures (light guiding structures with specific geometries) that control the direction of visible light emission. Each local structure is optimized to guide light directionally toward its corresponding pixel, improving spatial resolution without requiring complete redesign of the entire device
2Adaptability or versatility
If a rigid substrate is used for the image sensing device, then structural stability is maintained, but flexibility is reduced
Solution Approach 1:
The patent employs a flexible substrate instead of a rigid one, allowing the entire image sensing device to be bent or conform to different shapes. This flexible substrate maintains sufficient structural stability through appropriate material selection and thickness control, while enabling the device to be applied to curved surfaces or mobile applications, significantly improving adaptability
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
The solution significantly improves spatial resolution and flexibility of X-ray image sensing devices, allowing for more effective light sensing and broader application in X-ray imaging technologies.
Implementation Method 1
After the X-ray enters the image sensing device, it will pass through a scintillator layer for transforming the X-ray to the visible light
Implementation Method 2
The reflective layer is disposed on the guiding members
Data Source
AI summary
An active matrix image sensing device includes an image sensing substrate and a scintillator substrate. The image sensing substrate has a plurality of image sensing pixels. The scintillator substrate is disposed opposite to the image sensing substrate and includes a first substrate, a plurality of guiding members, a reflective layer and a scintillator layer. The guiding members are disposed on the first substrate and protruded from the first substrate toward the image sensing substrate. The guiding members are located corresponding to the image sensing pixels, respectively. The reflective layer is disposed on the guiding members, and the scintillator layer is disposed between the reflective layer and the image sensing substrate.