Sliding Flexible Display Antenna Structure for Wireless Charging
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Solution Overview
Problem
In electronic devices with flexible displays and wireless charging modules, the limited space and interference from the expansion display make it difficult to efficiently integrate wireless charging and communication antennas, leading to performance issues.
Innovation Solution
The design integrates a wireless charging antenna and a communication antenna on a shared flexible circuit board, with a shielding material layer to prevent noise interference, and a sliding structure that allows the antennas to be positioned optimally for both charging and communication functions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a flexible display and wireless charging module are integrated in an electronic device, then the device can provide both display expansion and wireless charging functions, but the space for the wireless charging module becomes insufficient
Solution Approach 1:
The patent combines the wireless charging antenna and communication antenna into a shared structure, where the communication antenna serves dual purposes as both a communication element and a shielding element for the wireless charging antenna. This merging reduces the total space required while maintaining both wireless charging and communication functions.
Solution Approach 2:
The communication antenna is designed to perform multiple functions: wireless communication and electromagnetic shielding for the wireless charging module. This multi-functionality allows the device to maintain both display expansion and wireless charging capabilities without proportionally increasing the space required.
2Area of stationary object
If the flexible display is expanded, then the display area increases, but it becomes difficult to connect the wireless communication antenna to the communication circuit on the printed circuit board
Solution Approach 1:
The patent employs flexible circuit boards and flexible connectors that can dynamically adjust their configuration. When the display is expanded, these flexible connections can accommodate the changed spatial relationships, maintaining electrical connectivity between the antenna and communication circuit regardless of the display's state.
Solution Approach 2:
The patent uses flexible circuit boards and flexible connectors that can bend and deform. These flexible elements maintain electrical connections between the antenna and communication circuit even when the display is expanded, as they can accommodate the spatial changes without breaking the electrical pathway.
3Volume of moving object
If the wireless charging antenna and communication antenna are placed close together to save space, then spatial efficiency improves, but noise interference between the antennas increases
Solution Approach 1:
The patent introduces a shielding element (the communication antenna itself) as an intermediary between the wireless charging antenna and the external environment. This intermediary absorbs or redirects electromagnetic interference, allowing the antennas to be placed close together while maintaining signal quality.
Solution Approach 2:
The patent converts the potential harmful electromagnetic interference into a beneficial shielding effect. The communication antenna, which would normally be susceptible to interference, is designed to also serve as a shield for the wireless charging antenna, transforming a vulnerability into a protective feature.
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
This configuration enhances spatial efficiency and performance by allowing both wireless charging and communication functions to be performed effectively while minimizing noise interference between the antennas and the flexible display.
Implementation Method 1
a conductive pattern mounted on the second plate between the second surface and the second plate; a first conductive path extending between the conductive portion of the first side wall and the conductive pattern
Implementation Method 2
with a shielding material layer to prevent noise interference
Data Source
AI summary
An electronic device of an embodiment of the present invention may comprise: a first structure comprising a first plate including a first surface and a second surface facing away from the first surface; a second structure comprising a second plate facing the second surface of the first plate, a first sidewall perpendicular to the second plate, a second sidewall perpendicular to the first sidewall and the second plate, and a third sidewall perpendicular to the first sidewall and the second plate and parallel to the second sidewall, wherein the first sidewall includes a conductive portion, and the second plate, the first sidewall, the second sidewall, and the third sidewall together form a trough with one side open to receive at least a portion of the first structure, and the first structure is movable between an open state and a closed state with respect to the second structure in a first direction parallel to the second plate and the second sidewall such that the first structure is located at a first distance from the first sidewall in the closed state and is located at a second distance greater than the first distance from the first sidewall in the open state; a flexible touch screen display layer comprising: a planar portion extending across at least a portion of the first surface and mounted to the first surface; and a bendable portion extending, during the closed state, from the planar portion into a space between the first sidewall and the first structure, wherein when the first structure is moved from the closed state to the open state, at least a portion of the bendable portion forms a substantially planar surface between the planar portion and the first sidewall as viewed from the top of the first plate; a conductive pattern mounted on the second plate between the second surface and the second plate; a first conductive path extending between the conductive portion of the first sidewall and the conductive pattern; a printed circuit board mounted on the first structure; a wireless charging circuit mounted on the printed circuit board; a wireless communication circuit mounted on the printed circuit board; and a flexible conductive path connected between the printed circuit board and the conductive pattern, wherein the flexible conductive path includes a second conductive path electrically connected between the wireless charging circuit and the conductive pattern, and a third conductive path electrically connected between the communication circuit and the first conductive path.