Array Sensor Global Clearing Signal Lines Residual Charge
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Solution Overview
Problem
Existing array sensors face performance degradation due to residual signals from ambient light and electronic leakage, which require multiple clearing cycles, prolonging image capture time.
Innovation Solution
The array sensor incorporates a driving circuit with global clearing signal lines to simultaneously activate odd and even rows of pixel units, allowing for simultaneous discharge of residual charge, reducing the time needed to clear residual signals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If pixel units are cleared row by row sequentially, then the clearing process can be implemented with simple control, but the time required to clear all pixel units is prolonged
Solution Approach 1:
The patent segments the pixel array into odd rows and even rows, and divides the control circuit into first and second driving circuits that independently control these segments. This segmentation allows simultaneous clearing of different row groups, reducing total clearing time while maintaining manageable control complexity through modular circuit design
Solution Approach 2:
The patent transitions from sequential row-by-row clearing (one-dimensional time progression) to parallel clearing of odd and even rows (two-dimensional simultaneous operation). By adding the temporal dimension of simultaneous operation, the system clears all pixel units in half the time compared to sequential processing
2Measurement precision
If multiple clearing cycles are performed to eliminate residual signals, then signal accuracy is improved, but the image capture time is prolonged
Solution Approach 1:
The patent performs preliminary clearing action by simultaneously activating both odd and even row pixel units at the beginning of the image capture process. This preliminary simultaneous clearing eliminates residual signals from previous frames before new image data is accumulated, ensuring high signal accuracy without requiring multiple sequential clearing cycles
Solution Approach 2:
The patent ensures continuous useful action by maintaining the clearing function as an integral part of each image capture cycle. The simultaneous clearing of odd and even rows occurs continuously at the start of each frame, eliminating the need for separate clearing cycles and ensuring that signal accuracy is maintained without time penalties
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 approach significantly reduces the time required to clear residual signals, thereby improving the performance and efficiency of the array sensor in capturing image information.
Implementation Method 1
the plurality of odd rows of pixel units simultaneously discharge residual charge; and the plurality of even rows of pixel units simultaneously discharge residual charge
Data Source
AI summary
An array sensor and a method for forming and operating the same are provided. The array sensor includes: a sensor circuit including an array of pixel units that includes N rows of pixel units; and a driving circuit including at least N rows of shifting units; where the driving circuit further includes: a first global clearing signal line connected with odd rows of shifting units, a signal of which being applied to trigger the odd rows of shifting units to simultaneously turn on odd rows of pixel units, so that the odd rows of pixel units simultaneously discharge residual charge; and a second global clearing signal line connected with even rows of shifting units, a signal of which being applied to trigger the even rows of shifting units to simultaneously turn on even rows of pixel units, so that the even rows of pixel units simultaneously discharge residual charge.