Shield Wiring Layout for Imaging Device Signal Integrity
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Solution Overview
Problem
Existing imaging devices face challenges in reducing parasitic capacitance between signal lines while maintaining the wiring area, particularly due to the lack of optimal shield wiring layouts, which affects the accuracy of signal processing and frame rate.
Innovation Solution
The proposed imaging device incorporates a shield wiring arrangement where shield wires are strategically placed between specific signal lines, reducing coupling capacitance and allowing signal lines to operate in phase or different phases without the need for extensive shield wiring, thereby minimizing parasitic capacitance and maintaining a compact wiring area.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If shield wiring is placed between all adjacent signal lines, then parasitic capacitance is reduced, but wiring area increases
Solution Approach 1:
The shield wiring is segmented and placed only between specific signal lines (e.g., between signal lines of different phases) rather than between all adjacent signal lines. This selective placement reduces the total wiring area while still providing shielding where it is most needed to maintain signal processing accuracy.
Solution Approach 2:
Different regions between signal lines are treated differently based on local requirements. Shield wiring is placed only in regions where signal lines operate in different phases and require isolation, while regions with signal lines operating in the same phase omit shield wiring to reduce area.
2Area of stationary object
If shield wiring is reduced to minimize wiring area, then wiring area decreases, but parasitic capacitance increases
Solution Approach 1:
Instead of uniformly placing shield wiring between all signal lines, the shield wiring is segmented and placed only between signal lines that operate in different phases. This selective approach maintains signal processing accuracy by providing shielding where phase differences cause interference, while omitting shields where phases are the same.
Solution Approach 2:
Rather than placing shield wiring between all adjacent signal lines as conventionally done, the invention inverts the approach by placing shields only between non-adjacent signal lines or between lines of different phases, thereby reducing total shield wiring while maintaining or even improving signal integrity.
3Productivity
If signal lines are arranged densely to increase pixel density, then pixel density increases, but coupling capacitance between signal lines increases
Solution Approach 1:
The shield wiring arrangement provides localized isolation between signal lines of different phases, enabling denser signal line packing without uniformly increasing parasitic capacitance. By placing shields only where phase differences create interference, the design maintains signal accuracy while achieving higher pixel density.
Solution Approach 2:
The shield wiring is segmented to provide targeted isolation between specific signal lines, allowing dense overall arrangement while maintaining signal integrity through selective shielding in critical regions where phase differences occur.
Data Source
AI summary
An imaging device is provided in which a shield wiring is arranged between signal lines of a first set out of a plurality of signal lines, and, in which signal lines of a second set out of a plurality of signal lines are adjacent to each other.