NFC Alignment via Optical Sensor and Directional Indicators
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Solution Overview
Problem
In mobile wireless communication systems, aligning near-field communication (NFC) devices can be challenging, especially when the second NFC device is outside the field of view or hidden by the mobile device, leading to difficulties in establishing communication due to the localized active region of the NFC antenna.
Innovation Solution
A mobile wireless communications system that includes a display, an optical sensor, a movement sensor, and a controller, which displays the field of view, locates a second NFC device, and provides directional indicators to align the first NFC device with the second NFC device, even when it is out of view, using movement sensors like accelerometers or gyroscopes to guide realignment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the mobile device is used for NFC communication, then communication capability is achieved, but alignment difficulty increases when the second NFC device is outside the field of view or hidden by the mobile device
Solution Approach 1:
The patent introduces an optical sensor as an intermediary to detect the position of the second NFC device and a display with directional indicators as another intermediary to guide the user. These intermediaries bridge the gap between the user and the hidden NFC device, enabling alignment without direct visual contact between the user and the target NFC device.
Solution Approach 2:
The patent replaces the mechanical/physical line-of-sight alignment requirement with an optical detection system. The optical sensor detects the second NFC device's position and the system calculates directional indicators, substituting the need for direct visual alignment with an automated optical-mechanical guidance system.
2Adaptability or versatility
If the mobile device size is increased (e.g., tablets), then device functionality is improved, but NFC alignment difficulty increases due to larger device dimensions
Solution Approach 1:
The patent adds a visual guidance dimension to the NFC alignment process. By displaying directional indicators and field of view information on the screen, the system transforms the alignment task from a purely spatial/physical operation into a guided visual task, making larger devices easier to align.
3Ease of operation
If directional indicators are provided to guide alignment, then alignment ease is improved, but device complexity increases due to additional sensors and processing
Solution Approach 1:
The patent makes the optical sensor and display serve multiple functions: detecting the second NFC device position, displaying the field of view, and providing directional alignment indicators. This multi-functionality reduces the need for separate dedicated components, thereby limiting the increase in device complexity.
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
Enables successful NFC communication by providing visual guidance to relocate the mobile device and align the NFC devices, improving the usability of NFC technology in larger mobile devices like tablets where alignment is difficult.
Implementation Method 1
an optical sensor having a field of view, a controller coupled with the display, the optical sensor
Implementation Method 2
a movement sensor, and a controller capable of displaying the field of view
Implementation Method 3
NFC technology is commonly used for contactless short-range communications based on radio frequency identification (RFID) standards, using magnetic field induction to enable communication between electronic devices
Data Source
AI summary
A mobile device may include a display, an optical sensor having a field of view, a movement sensor, a first near-field communication (NFC) device, and a controller. The controller may be configured to display the field of view of the optical sensor on the display, locate a second NFC device within the field of view, and display a direction indicator(s) on the display to indicate a guide direction of movement to align the first NFC device with the second NFC device. When the second NFC device falls outside the field of view, the controller may be configured to display the guide direction indicator(s) on the display to relocate the second NFC device within the field of view based upon the movement sensor. The controller may also be configured to cause the first NFC device to communicate with the second NFC device based upon proximity to the second NFC device.