Flexible Printed Circuit Board Antenna Integration
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Solution Overview
Problem
Conventional mobile terminals face space constraints that prevent the integration of antennas, necessitating external wiring or network usage, and suffer from unstable MIPI signal transmission during register detection, affecting miniaturization and user experience.
Innovation Solution
A flexible printed circuit board (FPC) with a backlight source on one surface and an antenna on the opposite surface, allowing for compact integration of antennas within the device, reducing the need for external antennas and improving signal quality by optimizing antenna design and placement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If external wiring is used as antenna due to space constraints, then antenna function can be achieved, but device complexity and user experience deteriorate
Solution Approach 1:
The patent combines the antenna function with the existing FPC structure by disposing the antenna on the back surface of the FPC, merging two separate components (antenna and display connection) into a single integrated element, thereby eliminating external wiring and reducing device complexity
Solution Approach 2:
The FPC is designed to serve multiple functions: it acts as both the display signal transmission medium and the antenna structure, allowing a single component to fulfill multiple roles and eliminating the need for separate external antenna wiring
2Volume of moving object
If antenna is integrated into mobile terminal, then device miniaturization is achieved, but space for antenna integration is limited
Solution Approach 1:
The patent utilizes the back surface of the FPC (a different spatial dimension/plane) for antenna integration, effectively expanding the available area for antenna placement without increasing the overall device volume, thus achieving miniaturization while providing sufficient space for antenna functionality
3Difficulty of detecting and measuring
If MIPI signal transmission is used for register detection, then detection capability is achieved, but signal stability deteriorates
Solution Approach 1:
The patent extracts the register detection function from the unstable MIPI signal path and implements it through the stable antenna signal path, separating the detection capability from the problematic transmission medium and achieving both detection capability and signal stability
Data Source
AI summary
A flexible printed circuit board (FPC), a mobile terminal and a fault detection method thereof are disclosed. The FPC includes: a first surface and a second surface which are disposed opposite to each other, a backlight source is disposed on the first surface, and an antenna is disposed on the second surface.