Scan Driving Unit I/O Reduction for Radiation Image Capturing
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Solution Overview
Problem
The existing radiation image capturing apparatuses require a large number of I/O ports and intricate wiring, leading to increased costs and complexity due to the need for multiple signal lines connecting to individual scan driving units, which limits the reduction of signal readout time and frame rate.
Innovation Solution
A radiation image capturing apparatus with a reduced number of I/O ports and simplified wiring, utilizing switches and scan driving units that apply ON and OFF voltages to selectively read image data from effective pixel regions, allowing for sequential shifting of scan lines and efficient data readout.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If signal lines are connected from the controller to the scan driving units individually, then signals can be input to any scan driving unit(s) flexibly and it is easy to perform trimming control, but the required number of I/O ports of the controller is large and the wiring becomes intricate
Solution Approach 1:
The patent merges the control of multiple scan driving units into a single integrated scan driving unit. This consolidation reduces the number of I/O ports required at the controller and simplifies the wiring structure, while the merged unit maintains the capability to selectively control different scan line groups through internal switching mechanisms, thus preserving trimming control functionality without requiring individual connections to each scan driving unit.
Solution Approach 2:
The single scan driving unit is designed with multi-functionality to perform the roles of multiple individual scan driving units. It can selectively drive different scan line groups (first through fourth groups) based on control signals, providing universal control capability that replaces the need for dedicated scan driving units for each region, thereby reducing I/O ports while maintaining operational flexibility.
2Loss of time
If the signal readout process is performed only on the effective pixel region, then the time required for the signal readout process is reduced and frame rate increases, but the wiring and I/O port requirements increase
Solution Approach 1:
The patent combines the scanning and readout control functions into a unified system where a single scan driving unit controls multiple scan line groups. This integration allows the system to perform rapid switching between different scan line groups corresponding to effective pixel regions, enabling fast selective readout without requiring separate dedicated wiring for each region, thus reducing readout time without proportionally increasing wiring complexity.
Solution Approach 2:
The system employs dynamic control where the scan driving unit can adaptively switch between different scan line groups based on the imaging requirements. This dynamic switching capability allows the system to optimize readout by activating only the necessary scan line groups for the current effective pixel region, reducing the time required for signal readout while avoiding the need for permanent dedicated wiring for all possible regions.
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 solution reduces the time required for signal readout and frame rate improvement by focusing on trimming control, minimizing unnecessary signal processing and simplifying the board configuration, thereby lowering costs and enhancing operational efficiency.
Implementation Method 1
electric charges generated in the radiation detectors according to the dose(s) of radiation that has been emitted from a radiation emission apparatus and passed through a subject
Data Source
AI summary
A radiation image capturing apparatus includes scan lines of 1st to nth lines, scan driving units, a controller, an OE signal line and a CPV signal line. The OE signal line is to input OE signal by which an ON voltage is applied to a scan line. The CPV signal line is to input CPV signal by which the scan line, to which the ON voltage is applied by the input of the OE signal, is shifted to a next scan line. To the scan driving units, the controller inputs the CPV signal to sequentially shift the scan line from the 1st line to the nth line, and inputs the OE signal to apply the ON voltage only when the scan line is a scan line of an effective pixel region from which image data is read.