Input Sensing Electrode Layout for Uniform Touch Response
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Solution Overview
Problem
Existing display devices often suffer from non-uniform sensing performance across their surface, leading to inconsistent touch input responsiveness.
Innovation Solution
A display device design featuring a display panel with an input sensing layer that includes a plurality of sensing electrodes and dummy electrodes, arranged in specific configurations to ensure uniform sensing performance across the entire area.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If sensing electrodes are arranged uniformly across the display panel, then the structure is simple, but sensing performance becomes non-uniform across different areas
Solution Approach 1:
The patent applies local quality by introducing dummy electrodes with different extents in different regions of the display panel. Specifically, dummy electrodes have smaller extents in certain areas compared to other areas, creating region-specific characteristics that compensate for variations in sensing performance across the panel. This allows each region to have optimized electrode configurations tailored to its specific sensing requirements, thereby achieving uniform overall sensing performance.
Solution Approach 2:
The patent employs parameter changes by varying the extent (size) of dummy electrodes across different regions. By adjusting the extent parameter of dummy electrodes in specific areas, the patent compensates for regional differences in sensing performance. This parameter variation allows the sensing system to maintain uniform performance characteristics across the entire display panel despite the underlying structural variations.
2Measurement precision
If dummy electrodes are added to compensate for sensing performance variations, then sensing uniformity improves, but device complexity increases
Solution Approach 1:
The patent applies local quality by introducing dummy electrodes with different extents in different regions of the display panel. Specifically, dummy electrodes have smaller extents in certain areas compared to other areas, creating region-specific characteristics that compensate for variations in sensing performance across the panel. This allows each region to have optimized electrode configurations tailored to its specific sensing requirements, thereby achieving uniform overall sensing performance.
Solution Approach 2:
The patent uses dummy electrodes as copies or replicas of sensing electrodes. These dummy electrodes replicate the basic electrode structure and function while being strategically positioned and sized to compensate for regional performance variations. By creating these auxiliary copies, the patent can balance out sensing performance without requiring complete redesign of the entire electrode system.
Data Source
AI summary
A display device includes: a display panel; and an input sensing layer on the display panel. The input sensing layer includes: a plurality of sensing electrodes; and a plurality of dummy electrodes on a layer different from the plurality of sensing electrodes and overlapping the plurality of sensing electrodes. The plurality of sensing electrodes includes: a first sensing electrode; and a second sensing electrode adjacent to the first sensing electrode, electrically separated from the first sensing electrode, and having a smaller extent than that of the first sensing electrode. The plurality of dummy electrodes includes: a first dummy electrode overlapping the first sensing electrode; and a second dummy electrode overlapping the second sensing electrode, and the first and second dummy electrodes are connected at a boundary area between the first and second sensing electrodes.