Imaging Device Signal Line Layout for Reduced Wiring Area
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Solution Overview
Problem
Existing imaging devices with multilayer wiring configurations do not optimize the layout of signal lines for pixels, leading to inefficiencies in wiring area usage and potential signal interference.
Innovation Solution
The proposed imaging device arranges signal lines in a specific layout where overlapping and non-overlapping positions of signal lines are strategically positioned relative to pixels in different rows to minimize wiring area and reduce signal interference, with shield wirings used to manage coupling capacitance between signal lines.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If signal lines are arranged in a multilayer wiring configuration without optimization, then the wiring area is reduced, but signal interference and coupling capacitance increase
Solution Approach 1:
The patent applies local quality by making different parts of the signal line arrangement have different properties. Specifically, signal lines are arranged at overlapping positions for pixels in odd rows and at non-overlapping positions for pixels in even rows. This local variation in arrangement strategy reduces coupling capacitance and signal interference while maintaining compact wiring area.
2Area of stationary object
If signal lines are arranged at overlapping positions to minimize wiring area, then wiring area is reduced, but coupling capacitance between signal lines increases
Solution Approach 1:
The patent segments the signal line arrangement into different patterns based on row parity. Signal lines for pixels in odd rows are arranged at overlapping positions, while signal lines for pixels in even rows are arranged at non-overlapping positions. This segmentation strategy reduces overall coupling capacitance while maintaining wiring compactness.
Solution Approach 2:
Different arrangement strategies are applied locally to different row groups. By making signal lines overlap for odd rows and non-overlap for even rows, the patent creates local variations in capacitance distribution that reduce the total coupling capacitance effect while maintaining small wiring area.
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 reduces the wiring area and minimizes signal interference, enhancing the accuracy of analog-to-digital conversions and increasing the frame rate of the imaging device by effectively managing parasitic capacitance between signal lines.
Implementation Method 1
enhancing the accuracy of analog-to-digital conversions and increasing the frame rate of the imaging device by effectively managing parasitic capacitance between signal lines
Data Source
AI summary
An imaging device is provided in which, at a position where a line passes a pixel in a first row along a second direction intersecting with a first direction, a first signal line and a second signal line are arranged at overlapping positions, in which, at a position where a line passes a pixel in a second row along the second direction, the first and the second signal lines are arranged at non-overlapping positions, and, in which, at a position where a line passes a pixel in a third row along the second direction, the first and the second signal lines are arranged at overlapping positions.