Input Sensing Electrode and Antenna Layout for Reduced Display Borders
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Solution Overview
Problem
Display devices with integrated input sensing parts face challenges in minimizing inactive areas while maintaining effective antenna communication and sensing functionality, leading to reduced efficiency and increased inactive regions.
Innovation Solution
The input sensing part design includes strategically placed sensing electrodes, ground patterns, antenna patterns, and signal pads on different layers, with connecting lines and dummy patterns to optimize the use of space and reduce inactive areas, allowing for efficient communication and sensing without overlapping with the display panel.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If antennas and sensing electrodes are integrated in the active area, then communication and sensing functionality are improved, but inactive area increases and layout complexity increases
Solution Approach 1:
The patent extends antenna patterns from the active area into the inactive area, utilizing the inactive area as an additional dimensional space for antenna deployment. This allows the antenna to achieve sufficient length for effective communication while minimizing the impact on the active display area, thus resolving the contradiction between functionality and inactive area minimization.
Solution Approach 2:
The antenna pattern is segmented into multiple sections: a first section in the active area and a second section extending into the inactive area. This segmentation allows the antenna to be strategically distributed across different zones, optimizing both communication performance and space utilization without excessive inactive area occupation.
2Reliability
If ground patterns are placed adjacent to antenna patterns, then antenna communication performance is improved, but inactive area increases
Solution Approach 1:
Ground patterns are strategically positioned only in specific regions adjacent to the antenna patterns where they are most needed for electromagnetic shielding and signal reference. The ground patterns are concentrated in the inactive area near the antenna extensions, providing localized improvement in communication reliability without unnecessarily expanding the inactive area across the entire display.
3Reliability
If multiple ground pads are disposed adjacent to signal pads, then electrical connection reliability is improved, but device complexity increases
Solution Approach 1:
The patent extracts the ground connection function into separate dedicated ground pads (first ground pad, second ground pad, third ground pad) that are distinct from the signal pads. This separation allows each ground pad to be independently optimized and connected to appropriate ground patterns, improving electrical connection reliability while maintaining manageable device complexity through functional decomposition.
Data Source
AI summary
Disclosed is an input sensing part that includes sensing electrodes disposed in an active area, a first ground pattern disposed in an inactive area around the active area, a first ground pad disposed in the inactive area and electrically connected to the first ground pattern, a first antenna pattern insulated from the sensing electrodes and disposed in the active area, a first signal pad that extends from the first antenna pattern and disposed in the inactive area, a 1-1-th ground pad disposed adjacent to the first signal pad and electrically connected to the first ground pattern, and a 1-2-th ground pad disposed adjacent to the first signal pad.