Radar Antenna Layout for Bezel-Less Gesture Sensing
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Solution Overview
Problem
The challenge lies in integrating radar hardware into computing devices with limited space, such as mobile devices, while minimizing interference from display panels and maintaining aesthetic design, particularly in bezel-less or minimal bezel configurations.
Innovation Solution
Radar hardware, including transmission and reception antennas and integrated circuits, is positioned within the bezel or along the sides of the device to avoid attenuation by the display panel, allowing for effective radar signal transmission and reception without obstructive interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If radar hardware is integrated into the bezel, then radar signal transmission and reception is improved, but device complexity increases
Solution Approach 1:
The radar hardware components (transmission antenna, reception antenna, and integrated circuit) are nested within the existing bezel structure of the display device. This allows the radar system to be integrated into the device without requiring additional external components, thereby improving radar signal transmission while minimizing the increase in device complexity.
Solution Approach 2:
The bezel structure serves multiple functions: it provides structural support for the display panel and simultaneously houses the radar hardware components. This multi-functionality approach allows the same structural element to serve both mechanical and sensing purposes, improving radar transmission capability without proportionally increasing device complexity.
2Shape
If radar hardware is positioned behind the display panel, then device aesthetics are improved, but signal attenuation increases
Solution Approach 1:
The radar hardware is extracted from the position behind the display panel and relocated to the bezel area. This extraction removes the harmful interference of the display panel from the radar signal path, significantly reducing signal attenuation. The radar components are positioned in the bezel where they can transmit and receive signals without obstruction from the display panel layers.
Solution Approach 2:
The bezel acts as an intermediary structure that houses the radar hardware at an optimal position relative to the display panel. By placing the radar components in the bezel rather than directly behind or in front of the display panel, the system achieves a compromise that maintains aesthetics while minimizing signal attenuation through strategic positioning.
3Ease of operation
If device size is reduced for portability, then ease of operation is improved, but space for input-sensing components decreases
Solution Approach 1:
Instead of placing radar hardware in the traditional position behind the display panel (using depth space), the system relocates components to the bezel area (using lateral space). This dimensional repositioning allows the radar system to be integrated into the device's lateral profile rather than requiring additional depth, enabling compact device design while maintaining adequate space for all input-sensing components.
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 enables the detection of user gestures and proximity without the limitations of bezel size, ensuring radar functionality in both bezel-less and traditional designs, while reducing signal attenuation and maintaining design aesthetics.
Implementation Method 1
a first radar integrated circuit configured to transmit radar waves via the first radar transmission antenna and receive radar waves via the first radar reception antenna
Data Source
AI summary
Devices are provided that include radar circuits arranged to send and receive radar signals that can be used to, for example, detect gestures performed in the vicinity of the device. Arrangements of the circuits and associated antennas allow for the device to have no bezel or a minimal bezel.