Display Touch Electrode Segmentation for Visibility and Noise Reduction
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Solution Overview
Problem
Existing electronic apparatuses with touch sensors face challenges in achieving optimal touch sensitivity and visibility due to limitations in sensor pattern design and layer configurations, which can lead to reduced performance and user experience.
Innovation Solution
The electronic apparatus incorporates a display panel with active regions featuring light-emitting regions, specifically designed sensor patterns, and connection patterns arranged in a manner that includes floating patterns and sub-pixels, enhancing touch sensitivity and visibility by minimizing overlap and optimizing signal line arrangements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If sensor patterns are densely arranged to improve touch sensitivity, then touch sensitivity is improved, but visibility deteriorates due to increased pattern overlap and noise
Solution Approach 1:
The sensor patterns are divided into multiple segments (first sensor patterns and second sensor patterns) that are spatially separated and arranged in different regions. This segmentation reduces the overlap between patterns while maintaining sufficient sensing coverage, thereby improving visibility without significantly compromising touch sensitivity
Solution Approach 2:
The patent introduces a floating pattern layer that is electrically isolated from other layers and positioned at a different spatial dimension. This floating pattern compensates for the reduced sensing coverage from segmented patterns, maintaining touch sensitivity while allowing the segmented patterns to improve visibility by reducing overlap
2Reliability
If connection patterns are added to connect sensor patterns, then electrical reliability is improved, but device complexity increases due to additional patterns and layers
Solution Approach 1:
The connection patterns are merged with the sensor patterns in terms of material composition and manufacturing process. Both are formed using the same transparent conductive oxide (TCO) material and are deposited in the same processing step, reducing the number of distinct manufacturing steps and simplifying the overall device structure despite the increased pattern count
Solution Approach 2:
The floating pattern serves multiple functions: it acts as a connection element for sensor patterns, provides additional touch sensing capability, and serves as a shielding layer against external electromagnetic interference. This multi-functionality reduces the need for separate dedicated structures, thereby managing complexity
3Measurement precision
If floating patterns are introduced to improve touch sensitivity, then touch sensitivity is improved, but manufacturing complexity increases due to additional layers
Solution Approach 1:
The floating pattern is manufactured using the same transparent conductive oxide material and deposition process as the sensor and connection patterns. By combining the manufacturing process for all conductive patterns into a single step, the patent avoids adding separate manufacturing stages, thereby managing manufacturing complexity while introducing the floating pattern layer
Solution Approach 2:
The floating pattern acts as an intermediary layer that is electrically isolated from other conductive layers by an insulating layer. This intermediary structure allows the floating pattern to provide additional sensing capability without creating direct electrical conflicts with other layers, simplifying the overall electrical design and manufacturing
Data Source
AI summary
Provided is an electronic apparatus including a display panel configured to provide an active region including a plurality of light-emitting regions, a first electrode including a plurality of first sensor patterns disposed in the active region and a plurality of first connection patterns respectively connected to the first sensor patterns, and a second electrode including a plurality of second sensor patterns insulated from the first electrode and disposed in the active region and a plurality of second connection patterns respectively connected to the second sensor patterns, wherein each of the first connection patterns includes a first pattern and a second pattern separated from each other in a first direction and respectively having a bar shape extending along a second direction crossing the first direction, and the light-emitting regions include at least one light-emitting pixel spaced apart from and disposed between the first pattern and the second pattern.