Self-Triggering X-Ray Detector Read-Out Circuit
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Solution Overview
Problem
Conventional X-ray photographing systems require a separate device for triggering the X-ray detector before X-ray generation, which is not efficient and lacks real-time detection capabilities.
Innovation Solution
An X-ray detector with a panel of photo-sensing pixels and a read-out integrated circuit that generates a self-triggering signal based on electrical signals from the pixels, allowing the detector to initiate its operation without external triggering, using a read-out unit with an amplifier, capacitor, and reset switch to detect X-ray incidence and switch to integration mode.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a separate triggering device is used to trigger the X-ray detector before X-ray generation, then the detector can be activated in time, but the system complexity increases and real-time detection capability is reduced
Solution Approach 1:
The triggering function is extracted from a separate external device and integrated into the read-out integrated circuit itself. The read-out integrated circuit now contains the capability to generate trigger signals internally based on its own detection of X-ray photons, eliminating the need for separate triggering hardware and reducing overall system complexity while maintaining reliable detection timing.
Solution Approach 2:
The read-out integrated circuit serves itself by generating trigger signals based on its own detection of X-ray photons. When the circuit detects sufficient photon signals indicating X-ray incidence, it automatically generates a trigger signal to activate the detector, enabling self-triggering operation without external control devices.
2Ease of operation
If external signal exchange is required to trigger the X-ray detector, then the detector can be controlled, but the operation efficiency decreases due to additional communication steps
Solution Approach 1:
The read-out integrated circuit performs self-triggering by monitoring its own detection signals and generating trigger commands autonomously. This eliminates the need for external signal exchange and communication steps, significantly improving operation efficiency while maintaining adequate detector control through the integrated circuit's internal logic.
Solution Approach 2:
The triggering control function is merged with the signal reading function within the same read-out integrated circuit. By combining detection and control functions in one component, the system eliminates separate communication steps between external devices, improving operational efficiency while maintaining control capability through integrated decision-making logic.
3Reliability
If a separate triggering device is used, then the detector can be activated, but the system lacks real-time detection capability
Solution Approach 1:
The read-out integrated circuit continuously monitors detection signals in real-time and immediately generates trigger signals when X-ray photons are detected, without waiting for external commands. This self-service mechanism enables real-time detection response while ensuring reliable detector activation through the integrated circuit's immediate reaction to detected photons.
Solution Approach 2:
The read-out integrated circuit continuously reads and monitors detection signals in advance, preparing to generate trigger signals immediately when X-ray photons are detected. This preliminary monitoring action enables real-time detection response by having the system ready to activate the detector at the exact moment of photon detection, without external communication delays.
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 real-time detection of X-ray incidence and automatic switching to integration mode, eliminating the need for a separate triggering device and improving the efficiency of X-ray detection in X-ray photographing systems.
Implementation Method 1
a panel including a plurality of photo-sensing pixels, the photo-sensing pixels being configured to detect an X-ray and to perform photoelectric conversion to output electrical signals
Data Source
AI summary
An X-ray detector includes a panel including a plurality of photo-sensing pixels, the photo-sensing pixels being configured to detect an X-ray and to perform photoelectric conversion to output electrical signals, and a read-out integrated circuit connected to the panel, the read-out integrated circuit being configured to read out the electrical signals from the photo-sensing pixels and to generate a self-triggering signal based on the read-out electrical signals.