Light Detection Device Auto-Detection via Signal Difference
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Solution Overview
Problem
Traditional digital light detection devices for X-ray imaging face limitations due to synchronization issues when connected to X-ray generation devices, leading to potential disturbances in signal synchronization and affecting the accuracy of image capture.
Innovation Solution
A light detection device with a first and second switching unit and a readout circuit that calculates the difference between readout signals from these units to determine if it is irradiated by detection light, allowing for an auto-detection mode that eliminates the need for synchronization with the X-ray generation device.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the light detection device is connected to the X-ray generation device for synchronization, then image capture can be performed under X-ray irradiation, but limitations in use and signal disturbance occur
Solution Approach 1:
The light detection device performs auto-detection by comparing readout signals from different switching units to determine whether X-ray irradiation has occurred, enabling the device to autonomously detect irradiation events without requiring external synchronization signals from the X-ray generation device, thus eliminating usage limitations and signal disturbance issues
2Reliability
If connection to X-ray generation device is established, then synchronized image capture is enabled, but device complexity increases
Solution Approach 1:
The patent extracts the synchronization dependency from the system by implementing an autonomous auto-detection function within the light detection device that compares readout signals from different switching units, removing the need for external connection to the X-ray generation device while maintaining reliable image capture capability
3Reliability
If traditional detection methods are used, then image capture is possible, but X-ray dose cannot be reduced
Solution Approach 1:
The patent applies partial action by performing auto-detection through signal comparison before triggering full image capture, allowing the system to identify and respond only to actual irradiation events, thereby reducing unnecessary X-ray exposure while maintaining reliable detection accuracy
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 accurate auto-detection and reduces the X-ray dose required for image capture, improving sensitivity and simplifying the detection process by eliminating the need for synchronization with the X-ray generation device.
Implementation Method 1
Photo diodes are generally used as light sensing units in the digital light detection device for detecting X-ray energy
Data Source
AI summary
A light detection device includes a first gate line, a second gate line adjacent to the first gate line, a first switching unit, a second switching unit, and a readout circuit. The first switching unit includes a first gate electrode connected to the first gate line, and a first drain electrode electrically connected to a light sensing unit. The second switching unit includes a second gate electrode connected to the second gate line, and a second drain electrode electrically connected to a light sensing unit. An operation method of the light detection device includes receiving a first readout signal and a second readout signal from the first switching unit and the second switching unit respectively by the readout circuit and calculating a difference between the first readout signal and the second readout signal for determining whether the light detection device is irradiated by detection light.