Open-Loop Display Signal Line Layout for NFC Transmission
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Solution Overview
Problem
The development of display apparatuses with near-field communication technology faces challenges in ensuring efficient signal transmission due to circuit limitations that interfere with antenna signals.
Innovation Solution
A display apparatus design featuring a signal line with an annular shape and gaps surrounding the display region, which avoids loop formation and minimizes interference with the wireless transmitting unit, thereby enhancing transmission performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the signal line is designed as a complete loop surrounding the display region, then the signal line can provide comprehensive electromagnetic shielding and maintain stable common electric potential, but it forms a closed loop that interferes with wireless signal transmission
Solution Approach 1:
The signal line is segmented by introducing gaps to break the closed loop structure. This segmentation maintains the shielding function while eliminating the harmful loop effect that interferes with wireless signals, resolving the contradiction between signal stability and wireless transmission quality.
Solution Approach 2:
The signal line transitions from a symmetric closed loop to an asymmetric open structure with gaps. This asymmetric design preserves the essential shielding function while disrupting the continuous loop that causes interference, allowing both display signal stability and wireless transmission to coexist.
2Object-affected harmful factors
If the signal line is broken into separate segments, then wireless signal transmission is improved by eliminating loop interference, but the electromagnetic shielding effect and signal stability are reduced
Solution Approach 1:
The signal line structure is optimized with different local characteristics - gaps are strategically positioned to eliminate loop interference in critical areas, while other segments maintain continuity to preserve shielding effectiveness. This local differentiation resolves the contradiction between breaking loops and maintaining stability.
Solution Approach 2:
The signal line acts as an intermediary structure that balances two conflicting requirements. By designing it as an open annular structure with gaps rather than a complete loop, it mediates between the need for electromagnetic shielding (stability) and the need to avoid wireless signal interference, achieving both goals simultaneously.
Data Source
AI summary
A display apparatus includes a wireless transmission unit and a display panel. The display panel includes a substrate, a plurality of pixel units and a signal line. The substrate includes a display region and a periphery region. The periphery region surrounds the display region. The pixel units are disposed on the display region. Each of the pixel units includes an active device and a pixel electrode. The active device is electrically connected to the pixel electrode. The signal line is on the periphery region. As viewed from a top view, the signal line has an annular shape having a gap and surrounds the display region.