RFID Mirror Reflective-Layer Antenna for Unobtrusive Vehicle Tagging
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Solution Overview
Problem
Conventional RFID transponders in vehicles are obtrusive and interfere with the aesthetic and line-of-sight, necessitating an integrated solution.
Innovation Solution
An RFID-enabled mirror is developed with a reflective layer that includes a booster antenna formed by selectively removing or adding metallic or dielectric materials, coupled with an RFID chip, allowing integration into vehicle mirrors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional RFID transponder is mounted on the vehicle's windshield or dashboard, then RFID communication functionality is achieved, but the driver's line-of-sight is obstructed and the aesthetic is interfered with
Solution Approach 1:
The patent merges the RFID transponder with the vehicle's existing mirror assembly, integrating the antenna and RFID chip into the mirror structure. This combination allows the mirror to serve dual purposes: maintaining its primary function for visibility while simultaneously providing RFID communication capabilities, thereby eliminating the need for separate transponder mounting that would obstruct the driver's view or compromise aesthetics
Solution Approach 2:
The mirror assembly is designed to perform multiple functions: it serves as both a traditional reflective mirror for driver visibility and as an RFID transponder for communication. The antenna is integrated into the mirror structure, enabling the single component to fulfill both optical and wireless communication roles, thus achieving multi-functionality without adding separate obstructive devices
2Reliability
If the reflective layer is modified to form a booster antenna, then RFID communication capability is enhanced, but mirror reflectivity may be affected
Solution Approach 1:
The patent applies local quality by creating a selective opening or aperture in the reflective layer at the specific location where the antenna needs to function. This localized modification allows the antenna elements to be exposed or formed only in the necessary region, while the surrounding reflective layer remains intact and maintains its mirror functionality, thus balancing RFID capability with reflectivity preservation
Solution Approach 2:
The reflective layer is segmented into different functional zones: one region is modified to form or expose the antenna elements for RFID communication, while other regions maintain the continuous reflective coating for mirror function. This segmentation allows both the antenna and mirror surfaces to coexist within the same component without compromising either function
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
The solution provides a non-obtrusive RFID system that maintains mirror functionality while enabling communication with various frequency bands, supporting toll systems and NFC devices, and offering notification capabilities.
Implementation Method 1
a booster antenna formed by selectively removing or adding metallic or dielectric materials
Implementation Method 2
a dielectric coating is applied to the mirror where the reflective layer was removed
Data Source
AI summary
A radio frequency identification (RFID) enabled mirror includes a mirror comprising a reflective layer. The reflective layer comprises at least one layer of a metallic material. At least one portion of the reflective layer is removed to form a booster antenna from a remaining portion of the reflective layer. A dielectric coating is applied to the mirror where the reflective layer was removed. The RFID-enabled mirror further includes an RFID chip coupled to the booster antenna.