Display-Integrated Shield Layer for Antenna Efficiency in Metal Frames
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Solution Overview
Problem
In electronic devices with tight internal structures, improving antenna efficiency is challenging due to compressed headroom regions, and existing shield structures complicate product design and assembly.
Innovation Solution
An electronic device with a metal shield layer that is annular and insulated from the metal frame and radio frequency circuit, reducing energy absorption by transparent metal materials in the display module, while allowing near-field communication signals to be transmitted through openings in the shield layer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a shield structure connected to an end of an antenna is disposed to improve antenna efficiency, then antenna efficiency is improved, but product design complexity increases and assembly process becomes more complex
Solution Approach 1:
The shield structure is merged with the display module by making the shield layer an integral part of the display module structure. The shield layer is formed on the same substrate as the display elements, combining shielding functionality with the display module without requiring separate shield components or complex assembly processes.
Solution Approach 2:
The display module serves multiple functions: it displays images and simultaneously acts as a shield structure for the antenna. The shield layer within the display module provides electromagnetic shielding while the display module maintains its primary function of visual output, achieving multi-functionality without additional components.
2Reliability
If a shield structure connected to an end of an antenna is disposed to improve antenna efficiency, then antenna efficiency is improved, but the assembly process becomes more complex
Solution Approach 1:
The shield structure is merged with the display module by making the shield layer an integral part of the display module structure. The shield layer is formed on the same substrate as the display elements, combining shielding functionality with the display module without requiring separate shield components or complex assembly processes.
3Reliability
If a metal shield layer is used to shield energy radiated from the metal frame, then antenna efficiency is improved by reducing energy absorption, but the display module may be affected
Solution Approach 1:
The shield layer is positioned specifically within the display module at locations where electromagnetic interference would most affect antenna performance, such as near transparent metal materials that absorb radiated energy. This localized shielding approach protects critical areas while maintaining overall display functionality and avoiding excessive interference with the display module.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enhances antenna efficiency by reducing energy absorption and maintaining communication signal integrity, simplifying assembly and design without compromising display effectiveness.
Implementation Method 1
the metal shield layer in the shield structure may generate reflection between the metal frame and the display module, thereby weakening field strength generated in the display module by radiated energy from the metal frame
Implementation Method 2
reduce absorption of the antenna-radiated energy by a lossy material inside the display module
Data Source
AI summary
The present invention provides an electronic device. The electronic device includes a mainboard, a metal frame, a display module, and a shield structure. The mainboard includes a radio frequency circuit. The metal frame is coupled to the radio frequency circuit, and configured to receive or transmit a radio frequency signal. The shield structure is located in the display module or on a side of the display module closer to the mainboard, and is connected to the display module. The shield structure includes a metal shield layer. The metal shield layer is insulated from the metal frame and the radio frequency circuit, and the metal shield layer can generate reflection between the metal frame and the display module, weaken field strength generated in the display module by radiated energy from the metal frame, and shield the energy radiated from the metal frame to the display module.