Input Sensor Electrode Routing With Signal Subtraction for Touch Sensitivity
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing input sensors in multimedia electronic devices experience sensitivity deterioration due to structural limitations, leading to reduced performance in touch-based input schemes.
Innovation Solution
The input sensor design incorporates a first and second electrode with intersecting sensor patterns and wires on the same layer, connected by bridges on different layers, and a sensor driving circuit that subtracts signals to enhance sensitivity, preventing deterioration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If sensor patterns are connected using wires on different layers, then structural complexity is reduced, but sensitivity deteriorates due to increased path length and potential interference
Solution Approach 1:
The patent transitions from vertical wire connections (different layers) to horizontal in-plane connections (same layer) for intersecting wires. This dimensional change allows the wires to be connected without increasing vertical path length, thereby maintaining sensitivity while simplifying the overall structural complexity of the sensor assembly.
Solution Approach 2:
The patent introduces a bridge structure as an intermediary element that connects sensor patterns when wires would otherwise intersect. This bridge acts as a mediator that allows electrical connection while maintaining the geometric separation needed for sensitivity, solving the contradiction between connection requirements and sensitivity preservation.
2Adaptability or versatility
If wires are arranged to intersect sensor patterns, then routing flexibility is improved, but short-circuit risk increases and sensitivity deteriorates
Solution Approach 1:
The patent segments the wire paths by routing intersecting wires on different layers rather than allowing them to cross in the same plane. This segmentation separates the wire paths spatially, eliminating short-circuit risk while maintaining routing flexibility through the multi-layer structure.
Solution Approach 2:
The bridge structure serves as an intermediary that enables wire routing flexibility while preventing short-circuits. It allows wires to connect sensor patterns at intersections without creating direct electrical pathways between adjacent wires, thus maintaining reliability while preserving routing adaptability.
3Measurement precision
If in-plane connection is used for intersecting wires, then sensitivity is maintained, but device area increases
Solution Approach 1:
The patent utilizes the vertical dimension (different layers) to route wires instead of expanding horizontally. By connecting intersecting wires on different layers, the solution maintains sensitivity through in-plane connection geometry while avoiding the area penalty that would result from additional horizontal routing space.
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 design maintains and improves sensitivity by preventing short-circuits and ensuring effective signal transmission, enhancing the performance of touch-based input in electronic devices.
Implementation Method 1
a sensor driving circuit including an output part outputting a signal obtained by subtracting the third signal from the second signal
Data Source
AI summary
An input sensor includes: a first electrode extending along a first direction and transmitting a first signal; a second electrode transmitting a second signal different from the first signal, and including a plurality of first sensor patterns arranged along a second direction intersecting the first direction and a first intersecting wire and connecting the first sensor patterns to each other; a third electrode transmitting a third signal different from the first signal, and including a plurality of second sensor patterns alternately arranged with the first sensor patterns along the second direction and a second intersecting wire and connecting the second sensor patterns to each other; and a sensor driving circuit including an output part configured to output a signal obtained by subtracting the third signal from the second signal.