Touch-Sensing Display Antenna Switching to Reduce Signal Interference
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Solution Overview
Problem
Signal interference between touch sensors and antennas in display devices deteriorates antenna performance, affecting wireless communication quality.
Innovation Solution
Incorporating multiple antenna sets on the touch sensing area of a display device, with an input sensing circuit and antenna module that determine the location of user inputs to switch between antenna sets for improved wireless communication, thereby minimizing interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If touch sensors and antennas are integrated on the same display panel, then the device achieves compact design and enhanced functionality, but signal interference occurs between the antenna and touch sensor causing antenna performance deterioration
Solution Approach 1:
The antenna is divided into multiple antenna sets (first antenna set and second antenna set) positioned at different locations on the touch sensing area. This segmentation allows the system to switch between different antenna segments based on touch input location, reducing signal interference while maintaining integrated functionality.
Solution Approach 2:
The system dynamically switches between different antenna sets based on real-time touch input detection. When a touch input is detected in a specific area, the corresponding antenna set is activated while others are deactivated, creating a dynamic adaptation mechanism that minimizes interference and maintains reliable wireless communication.
2Device complexity
If a single antenna set is used for wireless communication, then the device structure is simple, but signal interference from touch inputs in the antenna area degrades communication quality
Solution Approach 1:
The single antenna is segmented into multiple antenna sets positioned at different locations. This segmentation enables the system to avoid interference by selecting antenna sets that are not affected by touch inputs in specific areas, thereby maintaining communication quality without significantly increasing overall device complexity.
Solution Approach 2:
The touch sensing circuit acts as an intermediary that monitors touch input locations and controls the switching between different antenna sets. This intermediary mechanism coordinates the operation of multiple antenna sets to prevent interference while maintaining a relatively simple overall device structure.
3Reliability
If multiple antenna sets are disposed on the touch sensing area, then signal interference is minimized by switching between antenna sets, but the device complexity increases
Solution Approach 1:
The touch sensing circuit serves multiple functions: it detects touch inputs for user interaction and simultaneously controls the switching between different antenna sets for wireless communication. This multi-functionality reduces the need for separate control circuits, thereby limiting the increase in device complexity while maintaining improved signal quality.
Solution Approach 2:
The multiple antenna sets are merged into a single integrated antenna structure on the touch sensing area, sharing common support structures and control mechanisms. This merging approach reduces the overall complexity increase that would result from having completely separate antenna systems.
Data Source
AI summary
A display device includes: a display panel; a sensor substrate disposed on the display panel, the sensor substrate including a touch sensing area; sensing electrodes and antenna sets, disposed on the touch sensing area of the sensor substrate; and an input sensing circuit for sensing an external input based on sensing signals from the sensing electrodes. The input sensing circuit determines whether the external input occurred on an area in which the antenna sets are disposed in the touch sensing area, based on the sensing signals.