Pixel Sensor Control Circuit Reducing Wiring Complexity
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Solution Overview
Problem
Current X-ray detectors require multiple signals and complex timing control, leading to increased circuit complexity and wiring requirements, which complicates the control of pixel sensors and can result in noise and ripple issues during the reset process.
Innovation Solution
A pixel sensor design incorporating a photoelectric conversion circuit, energy storage circuit, reset circuit, and switch circuits, along with delay circuits, to convert optical signals into electrical signals, store, and amplify them, while simplifying control signals and reducing noise through controlled switching and scanning signals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple signals and complex timing control are used to control pixel sensor, then the pixel sensor can perform photoelectric conversion and signal output, but the circuit complexity and wiring requirements increase
Solution Approach 1:
The patent combines multiple control functions into a single scanning signal. The scanning signal simultaneously controls the reset circuit to release the storage node and the switch circuit to output the signal, merging what would traditionally require separate control signals into one unified timing mechanism. This reduces the number of control lines and simplifies the overall circuit architecture while maintaining reliable photoelectric conversion functionality.
2Reliability
If multiple signals and complex timing control are used to control pixel sensor, then the pixel sensor can perform photoelectric conversion and signal output, but the wiring requirements increase
Solution Approach 1:
The patent merges multiple control functions into a single scanning signal that simultaneously triggers the reset circuit and the switch circuit. This consolidation reduces the number of separate control lines required, thereby reducing wiring space and simplifying the overall layout of the pixel sensor array.
3Reliability
If reset circuit is turned on to transmit power signal to energy storage circuit, then the energy storage circuit can be reset, but noise and ripple issues occur during the reset process
Solution Approach 1:
The patent applies a delay circuit to postpone the activation of the reset circuit until after the photoelectric conversion is complete and the signal is ready for output. This preliminary timing adjustment ensures that the reset operation does not occur simultaneously with other sensitive operations, thereby reducing noise and ripple interference during the reset process while maintaining effective reset functionality.
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 design reduces the number of signals and signal lines, simplifies control, saves wiring space, and improves noise reduction during the reset process, enhancing the stability and versatility of X-ray detectors.
Implementation Method 1
a photoelectric conversion circuit, configured to convert an optical signal into an electrical signal
Data Source
AI summary
The present disclosure relates to a pixel sensor, a control method thereof, and a detector. The pixel sensor includes a photoelectric conversion circuit, an energy storage circuit, a reset circuit, a first switch circuit, and a second switch circuit; wherein, the energy storage circuit is connected to the photoelectric conversion circuit, and the photoelectric conversion circuit is further connected to a second power supply; a control end of the reset circuit is connected to a second scanning signal end; the first switch circuit is connected between the first power supply and a first node, and a control end thereof is connected to the first end of the energy storage circuit; second switch circuit is connected between the first node and a signal output end, and a control end thereof is connected to a first scanning signal end.