Input Sensing Unit Electrode Segmentation for Signal Isolation
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Solution Overview
Problem
Existing input sensing units in display apparatuses suffer from reduced electrical reliability and external input sensitivity, which affects the performance and durability of electronic devices.
Innovation Solution
The input sensing unit is designed with a specific electrode configuration comprising first, second, and third electrodes, each with distinct patterns and connection patterns, where the third electrodes receive a ground voltage, enhancing electrical reliability and sensitivity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the input sensing unit uses a conventional electrode configuration, then the device complexity is reduced, but the electrical reliability and external input sensitivity deteriorate
Solution Approach 1:
The input sensing unit is divided into three distinct electrodes (first, second, and third electrodes) with separate connection patterns. Each electrode is configured independently with specific patterns (e.g., first main patterns, second main patterns, third main patterns) that are spaced apart from each other in plan view, allowing independent optimization of each electrode's function while maintaining overall system reliability
Solution Approach 2:
Different regions of the input sensing unit are assigned different electrode types with specific characteristics. The first and second electrodes have connection patterns that overlap with display pixels, while the third electrode has connection patterns spaced apart from both first and second connection patterns. This local differentiation optimizes electrical reliability by preventing signal interference in specific regions
2Measurement precision
If the connection patterns are arranged to overlap with display pixels, then the external input sensitivity is improved, but the electrical reliability deteriorates due to potential interference
Solution Approach 1:
The connection patterns are segmented into different types (first connection patterns, second connection patterns, third connection patterns) with distinct spatial arrangements. The third connection patterns are specifically spaced apart from both first and second connection patterns in plan view, creating electrical isolation that prevents interference while maintaining sensitivity
Solution Approach 2:
The third electrode acts as an intermediary element that receives a different electrical signal than the first and second electrodes. This intermediary configuration allows the system to distinguish between touch inputs and display signals, preventing electrical interference while maintaining external input sensitivity
Data Source
AI summary
An input sensing unit including a plurality of first electrodes, each of which including a plurality of first main patterns and a plurality of connection patterns disposed between the first main patterns to connect two first main patterns adjacent to each other, a plurality of second electrodes each of which including a plurality of second main patterns and a plurality of connection patterns disposed between the second main patterns to connect two second main patterns adjacent to each other, and a plurality of third electrodes receiving an electrical signal that is different from that received by the second electrode. Each of the third electrodes includes a plurality of third main patterns spaced apart from the second sensing patterns in a plan view and a plurality of third connection patterns disposed between the third main patterns to connect two third main patterns adjacent to each other and spaced apart from the first connection patterns in a plan view.