Display Touch Sensor Electrode Layout With Overlapping Traces
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Solution Overview
Problem
Existing multimedia electronic devices face challenges in enhancing sensing performance through touch-based input methods, particularly in optimizing the design of sensor layers to improve sensitivity and accuracy.
Innovation Solution
The electronic device incorporates a sensor layer with a specific electrode and trace line configuration, including first and second electrode groups arranged in different directions, and trace lines that overlap the display area, with varying lengths and extensions to enhance sensing capabilities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If trace lines are extended to overlap the display area to improve sensing performance, then sensitivity and accuracy increase, but device complexity increases
Solution Approach 1:
The sensor layer is divided into multiple electrode groups (first electrode groups and second electrode groups) arranged in different directions, with trace lines selectively connected to specific electrode groups. This segmentation allows the sensing area to be expanded by having trace lines overlap the display area while maintaining manageable complexity through organized modular structure.
Solution Approach 2:
Different regions of the sensor layer are assigned different functions: first electrode groups are connected to first trace lines for sensing in one direction, while second electrode groups are connected to second trace lines for sensing in another direction. The trace lines are strategically positioned to overlap the display area only where needed, optimizing sensing performance without unnecessarily increasing overall device complexity.
2Measurement precision
If multiple electrode groups are arranged in different directions to enhance sensing capabilities, then input detection accuracy improves, but manufacturing complexity increases
Solution Approach 1:
The electrode structure is segmented into distinct first electrode groups and second electrode groups, each arranged in different directions and connected to separate trace lines. This segmentation enables independent optimization and simplifies the manufacturing process by allowing sequential formation of different electrode sets without requiring complex integrated patterning.
Solution Approach 2:
The first and second electrode groups are arranged asymmetrically in different directions (e.g., horizontal and vertical orientations), creating anisotropic sensing characteristics. This asymmetric arrangement improves input detection accuracy for directional inputs while maintaining manufacturability through standard lithographic processes that can accommodate directional variations.
Data Source
AI summary
An electronic device includes a display layer and a sensor layer. The sensor layer includes a plurality of first electrode groups arranged in a first direction, a plurality of second electrode groups arranged in a second direction crossing the first direction, and a plurality of trace lines electrically connected to the plurality of first electrode groups and the plurality of second electrode groups and at least partially overlapping the display area. Each of the plurality of first electrode groups includes a 1-1st electrode and a 1-2nd electrode spaced apart from each other in the second direction, and each of the plurality of second electrode groups includes a 2-1st electrode and a 2-2nd electrode spaced from each other in the first direction.