Embedded Display Panel Antenna Layout for Broadband Bezel Constraints
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Solution Overview
Problem
The reduction in bezel areas of mobile electronic devices poses a challenge for designing antennas, as there is limited space for their disposition, impacting the design flexibility and compatibility with various display panels.
Innovation Solution
An antenna is embedded within the display panel, comprising a first transmission line portion, impedance matching portion, second transmission line portion, and radiation pattern portion, with specific arrangements of power supply lines, grounds, and radiation slots to optimize space utilization and performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the antenna is disposed in the non-display area of the display panel, then the antenna area is reduced and design flexibility is improved, but the antenna may not have sufficient space for broadband operation
Solution Approach 1:
The antenna is divided into multiple functional segments: a first transmission line portion in the protrusion area, a second transmission line portion in the non-display area, an impedance matching portion with multiple slots, and a radiation pattern portion with asymmetric radiation slots. This segmentation allows each part to be optimized for its specific function while fitting within the limited non-display area.
Solution Approach 2:
The antenna structure utilizes the protrusion area extending from the display panel as an additional dimensional space. By placing the first transmission line portion in this protruding region and connecting it to the second transmission line portion in the non-display area, the design effectively uses three-dimensional space rather than being constrained to a two-dimensional plane, thereby achieving sufficient electrical length for broadband operation without increasing the footprint area.
2Adaptability or versatility
If the antenna is embedded in the display panel with asymmetric radiation slots, then broadband performance is maintained, but the device complexity increases
Solution Approach 1:
Different portions of the antenna are assigned different structural characteristics optimized for their specific functions: the impedance matching portion features multiple slots of varying sizes to control impedance transformation across frequencies, while the radiation pattern portion uses asymmetric radiation slots to broaden the frequency response. This local optimization allows broadband performance without requiring complex overall structure.
Solution Approach 2:
The radiation pattern portion incorporates asymmetric radiation slots that are not uniformly distributed or sized. This asymmetry breaks the symmetry of traditional antenna designs, enabling broader frequency operation by creating multiple resonant modes. The asymmetric configuration is strategically designed to achieve broadband performance while maintaining manufacturing feasibility.
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 allows for a compact antenna design that is easily adaptable to different display panels, preventing gain reduction across broadband frequencies and ensuring stable operation.
Implementation Method 1
an antenna for transmitting and receiving electromagnetic waves is embedded in a display panel
Data Source
AI summary
Provided are a display device and a mobile electronic device. The display device includes a display panel including a display area, a non-display area disposed outside the display area and a protrusion area extended from a portion of the non-display area, and a circuit board connected to the protrusion area. The antenna is electrically connected to the circuit board in the protrusion area. The antenna includes a first transmission line portion positioned in the protrusion area, an impedance matching portion disposed in the protrusion area and extended from the first transmission line portion, a second transmission line portion extended from the impedance matching portion and disposed over a first area of the non-display area corresponding to a corner of the display panel from the protrusion area, and a radiation pattern portion extended from the second transmission line portion and disposed in a second area of the non-display area corresponding to a side of the display panel, wherein the radiation pattern portion includes a plurality of radiation slots asymmetrically arranged.