Information Reading Apparatus Antenna Layout for Stable Communication
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Solution Overview
Problem
Existing information reading apparatuses face challenges in integrating information reading means and contactless communication means with a display means, leading to unstable contactless communication due to potential interference and increased costs and space requirements.
Innovation Solution
An information reading apparatus with a loop antenna where the reading port is arranged inside the loop antenna, and the display means is positioned not to overlap the loop antenna, allowing for increased antenna size and minimizing interference, while a magnetic holding member enhances magnetic flux collection for improved communication performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the display means is integrated into the terminal with the information reading means and contactless communication means, then the terminal can display reading results, but the display means may affect contactless communication performed by the contactless communication means
Solution Approach 1:
The patent resolves the spatial conflict between the display means and antenna by transitioning from a two-dimensional planar layout to a three-dimensional arrangement. The display means is positioned on the rear surface of the terminal body, while the antenna is arranged on the front surface, utilizing the third dimension (depth) to separate interfering components while maintaining device integration
2Reliability
If the antenna size is increased to improve contactless communication performance, then communication performance is improved, but the terminal size increases
Solution Approach 1:
By arranging the display means on the rear surface and the antenna on the front surface of the terminal body, the patent utilizes three-dimensional space to accommodate a larger antenna area without increasing the terminal's footprint. This spatial separation allows the antenna to achieve optimal size for communication performance while the terminal maintains a compact form factor
3Device complexity
If multiple reading functions (barcode reader, IC card reader) are integrated into a single terminal, then cost and space requirements are reduced, but interference between different reading functions may occur
Solution Approach 1:
The patent applies three-dimensional spatial arrangement to separate components that may interfere with each other. The display means is positioned on the rear surface while the antenna and reading functions are arranged on the front surface, creating physical separation that reduces electromagnetic interference and crosstalk between different reading functions while maintaining integration in a single terminal
Solution Approach 2:
The patent introduces a shutter mechanism as an intermediary component that controls and manages the operation of different reading functions. The shutter can selectively block or enable access to the reading port, preventing simultaneous operation of barcode scanning and IC card reading functions, thereby avoiding crosstalk and interference between these functions
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
Ensures stable contactless communication and improved communication performance by minimizing the impact of the display means on the antenna and increasing antenna size, while maintaining the integration of information reading and display functions.
Implementation Method 1
a contactless communication means (30) for reading information stored in a contactless communication medium (100) held over a reading surface (12), the information being read through contactless communication according to transmission/reception of electromagnetic waves via a loop antenna (34)
Implementation Method 2
a magnetic holding member enhances magnetic flux collection for improved communication performance
Data Source
Figure 1
Figure 2
Figure 3~4
AI summary
An information reading apparatus (10) is provided. The information reading apparatus (10) enables stable contactless communication with a contactless communication medium (100) even when the apparatus (10) includes a display device (24) for displaying information associated with reading results, in addition to an information reading device (40) and a contactless communication device (30). The information stored in the contactless communication medium (100) held over a reading surface (12) is read by the contactless communication device (30) according to transmission/reception of electromagnetic waves via an antenna (34). The reading surface (12) includes a reading port (13) on the inside of the antenna (34) in plan view of the reading surface, and includes a mark arranged not to overlap the antenna (34).