Rollable Display Antenna Structure for Hidden Bezel Radiation
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Solution Overview
Problem
In electronic devices with rollable displays, securing antenna performance is challenging since the antenna area is often hidden by the display, leading to reduced signal emission and reception efficiency.
Innovation Solution
The integration of an array antenna and a director unit made of conductive material on the printed circuit board within the bezel area of the rollable display, which directs radio waves and maintains antenna gain even when the display is wound, ensuring effective signal transmission and reception.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If a rollable display is wound on the housing, then the display can be compacted and portability is improved, but the antenna area is hidden by the display and antenna gain is reduced
Solution Approach 1:
The antenna system is segmented into multiple functional components: array antenna elements for signal transmission, director elements for beam direction, and reflector elements for signal reinforcement. This segmentation allows each component to perform its specific function independently, maintaining overall antenna performance even when the display is wound and obscuring parts of the antenna structure.
Solution Approach 2:
The patent transitions from a two-dimensional planar antenna layout to a three-dimensional spatial configuration. Director elements are positioned at specific distances from the array antenna elements along the beam direction, and reflector elements are placed behind the array antenna. This three-dimensional arrangement enables the antenna system to maintain gain and directivity even when the display is wound, as the spatial relationships between elements are preserved in the rolled state.
2Ease of manufacture
If the array antenna is disposed in the bezel area, then the antenna structure is simplified and manufacturing is easier, but the antenna area is still partially hidden when the display is wound
Solution Approach 1:
The antenna system employs a nested configuration where director elements are positioned in front of the array antenna elements, and reflector elements are positioned behind them. This nested arrangement maximizes the use of the limited bezel area while maintaining the functional separation of antenna components. The multi-layer nesting allows the antenna system to achieve adequate radiation area and performance within the constrained space of the rolled display 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
This configuration enhances antenna gain by up to 6 dBi compared to comparative examples, maintaining efficient communication performance despite the display being rolled, thereby addressing the issue of hidden antenna areas.
Implementation Method 1
an array antenna mounted or embedded on the printed circuit board as a module
Implementation Method 2
a director unit comprising at least one director comprising a conductive material corresponding to a beam being formed by the array antenna
Data Source
AI summary
An electronic device according to various embodiments may include: a column-shaped housing including a processor and a communication module comprising communication circuitry disposed therein; a rollable display wound on a column face of the housing, wherein a printed circuit board is disposed on the housing; an array antenna mounted or embedded on the printed circuit board as a module; and a director unit including at least one director comprising a conductive material corresponding to a beam being formed by the array antenna and disposed on at least a part of the rollable display in a state in which the rollable display is wound.