Imaging Apparatus Signal Processing Circuit Wiring Layout
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Solution Overview
Problem
Imaging apparatuses face noise contamination from external magnetic fields due to the capture of magnetic fields by loops formed by power source and reference voltage supplying wires, which affects the quality of captured images.
Innovation Solution
The imaging apparatus is designed with a configuration where signal processing units and pixel groups receive voltages from specific external terminals in alternating directions, minimizing the area of loops that can capture external magnetic fields, thereby reducing noise interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If power source voltage and reference voltage are supplied through shared wiring paths to pixel units and signal processing circuits, then device complexity is reduced, but external magnetic fields are captured by the formed loops causing noise
Solution Approach 1:
The patent segments the voltage supply paths by providing separate power source voltage supply terminals and reference voltage supply terminals for different circuit blocks (pixel units and signal processing circuits). This segmentation prevents the formation of large loops that would capture external magnetic fields, thereby reducing magnetic noise while maintaining wiring simplicity through systematic terminal distribution.
2Object-affected harmful factors
If separate signal processing units are arranged in different directions with respect to the pixel region, then magnetic field noise is reduced, but device complexity increases
Solution Approach 1:
The patent employs asymmetric arrangement of signal processing units by positioning them in different directional relationships with respect to the pixel region. Specifically, at least one signal processing unit is arranged in a direction different from the arrangement direction of the pixel units themselves. This asymmetric configuration minimizes the area of loops formed by wiring paths, thereby reducing magnetic field noise capture while maintaining manageable device complexity through purposeful spatial optimization.
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 configuration effectively decreases noise originating from external magnetic fields, particularly in imaging apparatuses with closely packed pixels and multiple signal processing circuits, enhancing image quality by minimizing loop areas and noise contamination.
Implementation Method 1
a pixel region which has pixels that are each driven by a power source voltage arrayed therein
Data Source
AI summary
An imaging apparatus includes: a first signal processing circuit arranged in a first direction to process a signal from a first group of pixels; a second signal processing circuit arranged in a second direction to process a signal from a second group of pixels; a first external connecting terminal arranged in the first direction to supply a first potential to the first signal processing circuit; a second external connecting terminal arranged in the second direction to supply the first potential to the second signal processing circuit; a third external connecting terminal arranged in the first direction to supply a second potential to the first group of pixels; and a fourth external connecting terminal arranged in the second direction to supply the second potential to the second group of pixels.