Vehicle Door Handle Antenna Module Integrating NFC LF RF
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Solution Overview
Problem
Conventional smart key systems for vehicle door control require users to carry a smart key, which is inconvenient, as they need to approach the vehicle and manually control the door using a passive switch.
Innovation Solution
A vehicle door control system that uses a communication unit for wireless communication with a smart key or portable terminal, including LF, RF, and NFC communication, allowing authentication and door control via a controller and motor driver, enabling door control without the need for a smart key.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a conventional smart key system is used for vehicle door control, then the door can be locked or unlocked through authentication, but the user must carry a smart key and manually approach the vehicle to operate the passive switch
Solution Approach 1:
The patent replaces the mechanical interaction of manually pressing a passive switch with a smart key with contactless NFC communication between the portable terminal and the vehicle door handle. The NFC discovery signal and response signal enable automatic authentication without physical contact or manual switch operation, substituting mechanical action with electromagnetic field-based wireless communication.
Solution Approach 2:
The system enables self-service door control by allowing the portable terminal to automatically perform authentication with the vehicle door handle through NFC communication. The user simply needs to have the portable terminal near the door handle, and the system automatically discovers the terminal, authenticates it, and controls the door without requiring manual intervention or carrying a separate smart key.
2Adaptability or versatility
If NFC communication is integrated into the door handle along with LF and RF communication, then wireless communication capabilities are enhanced, but the antenna module structure becomes more complex
Solution Approach 1:
The patent merges the NFC antenna with the existing LF and RF antennas into a single integrated antenna module located at the door handle. The antenna module includes a first antenna for LF communication, a second antenna for RF communication, and a third antenna for NFC communication, all combined in one structure to reduce the number of separate components and simplify installation.
Solution Approach 2:
The antenna module is designed to perform multiple communication functions simultaneously - LF communication for smart key discovery, RF communication for smart key authentication, and NFC communication for portable terminal authentication. This multi-functional antenna module eliminates the need for separate antenna structures for each communication type, reducing overall system complexity despite enhanced versatility.
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
Enhances user convenience by allowing door control through authentication with a portable terminal, improving usability and performance by integrating NFC, LF, and RF communication technologies within a single antenna module at the door handle.
Implementation Method 1
a communication unit (11, 12, 13) configured to wirelessly communicate with a smart key (2) or a portable terminal (3) located around a vehicle
Data Source
AI summary
Disclosed is a vehicle door control technology such as a vehicle door control system. The vehicle door control system includes a communication unit configured to wirelessly communicate with a smart key or a portable terminal located around a vehicle, a controller configured to communicate with the smart key or the portable terminal using the communication unit, perform authentication on the smart key or the portable terminal based on a received signal, and output a door control signal for controlling a vehicle door when the authentication is successful, and a motor driver configured to lock or unlock the vehicle door according to the door control signal.