Radiation Detection Element Shared Signal Lines
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Solution Overview
Problem
Existing radiographic imaging devices face challenges in achieving optimal resolution and imaging speed while minimizing device size, as they require different data lines for high-resolution still images and high-frame-rate moving images, leading to increased device size and complexity.
Innovation Solution
A radiation detection element with a grid of pixels, each equipped with a sensor section and two switching elements, uses shared control lines and signal lines to read charges from multiple pixels simultaneously, allowing for adjustable resolution and frame rate based on imaging purpose without increasing device size.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If different data lines are provided for high-resolution still images and high-frame-rate moving images, then both imaging modes can be achieved, but the number of lines and signal detection circuits increases, leading to increased device size
Solution Approach 1:
The patent makes a single data line serve multiple functions by enabling it to handle both high-resolution still image data and high-frame-rate moving image data through the use of two switching elements per pixel. The first switching element routes data for still images while the second switching element routes data for moving images, allowing one data line to functionally replace what would traditionally require separate dedicated lines for each imaging mode.
Solution Approach 2:
The patent combines the data line requirements for still images and moving images into a single shared data line infrastructure. By merging the output paths of both switching elements to the same data line, the design eliminates the need for separate parallel data line sets, thereby reducing the total number of lines and associated signal detection circuits while maintaining support for both imaging modes.
2Adaptability or versatility
If more signal lines and control lines are provided to support dual imaging modes, then imaging versatility improves, but device complexity increases
Solution Approach 1:
Each pixel is equipped with two switching elements that share common data lines and control lines. The first switching element is controlled by a first control line for still image operations, while the second switching element is controlled by a second control line for moving image operations. This multi-functional switching architecture allows the same physical infrastructure to support different imaging modes without requiring separate dedicated circuits for each mode.
Solution Approach 2:
The patent introduces dynamic switching capability within each pixel using two controllable switching elements. By dynamically selecting which switching element is active based on the imaging mode (still or moving), the system adapts its data routing behavior without requiring permanent, static circuit configurations for each mode. This dynamic approach reduces overall circuit complexity compared to having fixed, separate pathways for each imaging type.
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
This configuration enables optimal resolution and imaging speed for both still and moving images while reducing the number of signal lines and control lines, thereby minimizing the device's size and improving pixel density and frame rate.
Implementation Method 1
a sensor section that generates charges according to irradiated radiation
Data Source
AI summary
The present invention provides a radiation detection element and a radiographic imaging device that may provide optimal resolution that corresponds to the purpose of imaging and to imaging speed, and that may suppress increase in device size. Namely, TFTs of plural pixels in a column direction are connected to the same signal lines. When a moving image is imaged, a control signal is output via a control line, the TFTs of the pixels are turned on, and the charges are read-out from sensor sections. Since the two pixels×two pixels are operated as one pixel and the charges are extracted, resolution may be lowered when compared with a still image and a frame rate may be improved.