Sliding Housing Antenna Structure for Stable Flexible Display Feeding
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Solution Overview
Problem
Antennas in flexible electronic devices face challenges with limited radiation areas due to blocking by metal components, making implementation difficult during relative movements of structures.
Innovation Solution
Utilize the external metal structure of the second housing as part of the antenna structure, with a feeding structure connected to symmetrical parts of the antenna structure to maintain stable power feeding and resonance characteristics during sliding movements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If an antenna is designed in the first housing with driving components mounted therein, then the antenna can be integrated with the device structure, but the radiation area is blocked by other metal components making antenna implementation difficult
Solution Approach 1:
The patent transitions the antenna from a two-dimensional planar structure on the circuit board to a three-dimensional structure utilizing the external surface of the second housing. This dimensional change allows the antenna to access additional space and avoid blockage from internal metal components, thereby improving radiation area while maintaining integration with the device structure
Solution Approach 2:
The patent introduces a feeding structure as an intermediary element that electrically connects the antenna on the second housing to the circuit board inside the first housing. This mediator enables the antenna to be positioned externally for better radiation while maintaining electrical connection to the internal circuitry, resolving the contradiction between integration and radiation area
2Ease of operation
If the first housing slides in and out of the second housing, then the flexible display can be extended, but the relative movement causes unstable power feeding to the antenna structure
Solution Approach 1:
The patent employs an asymmetric feeding structure design where the feeding path is configured to maintain consistent electrical connection characteristics regardless of the sliding position. The feeding structure includes contact elements and conductive paths arranged to ensure stable power delivery to the antenna during the asymmetric motion of sliding in and out, thereby maintaining reliability during display extension operations
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
Ensures stable antenna performance and resonance characteristics during slide-in and slide-out operations of flexible displays, maintaining consistent communication capabilities.
Implementation Method 1
a feeding structure disposed on the circuit board and configured to feed power to the antenna structure
Implementation Method 2
an antenna structure formed on an outer surface of the second housing and including a first part and a second part latitudinally symmetrical with respect to a first axis perpendicular to a direction of the sliding
Data Source
AI summary
An electronic device according to various embodiments of the present disclosure may comprise: a first housing; a second housing configured to accommodate at least a portion of the first housing and to guide a sliding motion of the first housing; a flexible display including a first display area connected to the first housing, and a second display area extending from the first display area and capable of bending or rolling; a circuit board disposed in the first housing and movable in response to the sliding motion of the first housing; an antenna structure formed on an outer surface of the second structure, and including a first part and a second part that are symmetrical about a first axis perpendicular to the sliding motion direction; and a feeding structure disposed on the circuit board configured to feed power to the antenna structure. The feeding structure is electrically connected to a first point of the first part in a state in which the flexible display slides in, and the feeding structure is electrically connected to a second point of the second part in a state in which the flexible display slides out. The first point and the second point may be spaced apart from each other by the same distance as the first axis.