Flexible PCB NFC Antenna Reusing Display Bonding Test Pins
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The increasing slimness of mobile devices restricts the space available for NFC antennas, leading to the abandonment of the NFC function, which negatively impacts user experience.
Innovation Solution
A flexible printed circuit board design that reuses the impedance test loop of bonding pins as an NFC antenna coil, utilizing helical and broken metal connecting wires, and incorporates anti-electromagnetic interference layers to minimize space usage and interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Weight of moving object
If the device is made thinner and lighter, then the portability is improved, but the space for NFC antenna is reduced
Solution Approach 1:
The patent merges the impedance test loop structure with the NFC antenna coil by making the impedance test pins serve dual purposes: as bonding pins for the display panel and as the NFC antenna coil. This integration eliminates the need for separate antenna components, reducing overall space occupation while maintaining both testing and NFC functionality.
Solution Approach 2:
The impedance test pins are designed to perform multiple functions: they serve as bonding pins for electrical connection to the display panel, as test pins for impedance measurement, and as the NFC antenna coil. This multi-functionality reduces the number of separate components needed, thereby saving space in thin devices.
2Adaptability or versatility
If a separate NFC antenna is added, then the NFC function is improved, but the device complexity increases
Solution Approach 1:
The patent combines the NFC antenna coil with the existing impedance test loop structure on the circuit board. By using the same metal traces and pins for both impedance testing and NFC communication, the design avoids adding separate antenna components, thereby maintaining circuit board simplicity while enabling NFC functionality.
Solution Approach 2:
The impedance test pins are designed to serve multiple purposes: as bonding pins for the display panel, as test pins for impedance measurement, and as the NFC antenna coil. This multi-functionality reduces the number of separate components needed, thereby simplifying the overall device structure.
3Reliability
If additional materials are used for the NFC antenna, then the NFC performance is improved, but the manufacturing cost increases
Solution Approach 1:
The patent merges the NFC antenna coil with the existing impedance test loop structure, utilizing the same metal traces and bonding pins already present on the circuit board. This integration eliminates the need for additional antenna materials, thereby reducing manufacturing costs while maintaining NFC performance.
Solution Approach 2:
The impedance test pins are designed to serve multiple purposes, including as the NFC antenna coil. By reusing existing materials and structures for multiple functions, the design avoids additional material costs while ensuring reliable NFC operation.
Data Source
AI summary
The present disclosure provides a flexible printed circuit board and a display apparatus. The flexible printed circuit board includes a plurality of bonding pins, where the plurality of bonding pins are configured to be bonded with a display panel, and the plurality of bonding pins include impedance test pins; and an antenna coil, including two metal connecting wires and the two impedance test pins, where the metal connecting wires are electrically connected between the impedance test pins and a near field communication module; and when the plurality of bonding pins are bonded with the display panel, the two impedance test pins are electrically connected through a conducting wire in the display panel.