Input Sensor Electrode Patterns for Touch Sensing
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Solution Overview
Problem
Current electronic apparatuses face challenges in providing improved sensing performance for both passive and active type inputs, particularly in accurately detecting touch or pressure inputs for fine touch applications like drawing or sketching.
Innovation Solution
The electronic apparatus incorporates a unique input sensor design with intersecting first and second electrodes, featuring specific patterns and bridge patterns on a display panel, which enhances sensing sensitivity by ensuring uniform signal generation across the input area.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional input sensor designs are used, then the structure is simple, but the sensing performance for both passive and active type inputs is insufficient
Solution Approach 1:
The first electrode is divided into multiple first patterns spaced apart from each other, and the second electrode is divided into multiple second patterns spaced apart from each other. This segmentation increases the number of sensing nodes and improves sensing performance for both passive and active type inputs while maintaining a manageable structural complexity through systematic arrangement.
Solution Approach 2:
Bridge patterns are specifically disposed between corresponding pairs of adjacent first patterns and second patterns at locations where sensing performance needs enhancement. This local addition of bridge patterns improves sensing accuracy in critical areas without requiring complete restructuring of the entire electrode system, thus balancing performance improvement with structural complexity.
2Measurement precision
If electrodes are arranged to improve sensing sensitivity, then sensing accuracy improves, but signal uniformity across the input area may be compromised
Solution Approach 1:
The first patterns and second patterns are arranged asymmetrically with respect to each other, with bridge patterns connecting specific pairs of adjacent patterns. This asymmetric arrangement creates multiple sensing nodes with different characteristics, improving overall sensing accuracy by capturing varied touch interactions while the systematic distribution maintains signal uniformity across the input area.
Solution Approach 2:
The bridge patterns are designed to create equipotential regions between adjacent first patterns and second patterns, ensuring uniform signal distribution across the input area. By strategically placing bridge patterns between corresponding pairs of adjacent patterns, the design maintains electrical potential balance, which preserves signal uniformity while enhancing sensing accuracy through increased node density.
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 improves the apparatus's ability to detect both passive and active type inputs, increasing sensitivity and accuracy, particularly for fine touch applications, by ensuring uniform signal generation and reducing parasitic capacitance.
Implementation Method 1
The input sensor may sense a touch or pressure applied by a user's body
Data Source
AI summary
An electronic apparatus includes a display panel, and an input sensor disposed on the display panel and including a first electrode, a second electrode, a first sensing line connected to the first electrode, and a second sensing line connected to the second electrode. The first electrode includes first patterns, which are spaced apart from each other and include a first side and a second side that is longer than the first side and first bridge patterns disposed between the first patterns spaced apart from each other. The second electrode includes second patterns, which are spaced apart from each other and include a third side and a fourth side that is longer than the third side and second bridge patterns disposed between the second patterns spaced apart from each other. The first side faces the fourth side, and the second side faces the third side.