Display Conductive Sheet Antenna for Foldable Radiation Performance
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Solution Overview
Problem
Electronic devices with large screen displays face challenges in antenna placement due to reduced radiation performance caused by displays and metal bezels, especially in foldable devices with flexible displays, leading to issues with frequency bands and bandwidths.
Innovation Solution
Incorporating a conductive sheet on the rear surface of the display panel as a radiator, connected to a wireless communication circuit and a grounding structure, allowing efficient frequency shifting and radiation performance enhancement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If a large screen display is included in the electronic device, then the display area is improved, but antenna placement becomes difficult and radiation performance deteriorates
Solution Approach 1:
The patent merges the display structure with the antenna function by using the conductive sheet of the second display as the radiator. The display panel and its conductive sheet are integrated to form an antenna that can transmit and receive wireless signals, eliminating the need for separate antenna components in the display area.
Solution Approach 2:
The conductive sheet of the second display serves multiple functions: it acts as both the backlight conductive layer for display functionality and as the radiator for wireless communication. This multi-functional design allows the same component to fulfill both display and antenna roles, improving space utilization and radiation performance.
2Ease of operation
If an antenna is disposed between the first and second displays or near a metal bezel, then the antenna placement is achieved, but radiation performance is reduced due to nulls
Solution Approach 1:
The patent converts the potentially harmful effect of the metal bezel and display structures into a beneficial antenna radiation structure. By using the conductive sheet of the second display as the radiator and strategically placing the grounding structure, the metal components that could cause nulls are instead utilized to enhance radiation performance through controlled current distribution.
Solution Approach 2:
The patent applies different functional properties to different parts of the conductive sheet. The region near the power feed unit serves as the active radiating element, while the grounding structure is positioned at a specific location to provide reference potential and control current flow, creating localized functional zones that optimize overall radiation performance.
3Adaptability or versatility
If antennas are disposed between and/or near the bending areas of the flexible display, then the antenna placement is achieved, but radiation performance is reduced
Solution Approach 1:
The patent designs the antenna system to be dynamic and adaptable to the flexible display's bending states. The conductive sheet antenna and grounding structure are positioned and dimensioned to maintain effective radiation characteristics whether the display is flat or bent, allowing the antenna to function reliably in both folded and unfolded states of the foldable device.
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
The solution enhances radiation performance by using the display's conductive sheet as a radiator, maintaining frequency shift and bandwidth expansion without affecting nearby antennas.
Implementation Method 1
the wireless communication circuit is configured to transmit or receive wireless signals in the specified frequency band through at least a portion of the conductive sheet
Data Source
AI summary
According to various embodiments, the electronic device may include at least one housing; a first display disposed in the inner space of at least one housing; a second display disposed in the inner space to be facing the opposite direction of the first display and including a display panel and a conductive sheet disposed on the rear surface of the display panel; a board disposed in the inner space; a wireless communication circuit disposed on the board and electrically connected through the first point of the conductive sheet; and a grounding structure electrically connected to the conductive sheet in the second point spaced at a distance from the first point, wherein the wireless communication circuit is configured to transmit or receive wireless signals in the specified frequency band through at least a portion of the conductive sheet.