Signal Transmission Apparatus Using Flexible Circuit Board Port Connection
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Solution Overview
Problem
The existing signal transmission apparatuses in touch control liquid crystal displays face limitations in size reduction due to the need for multiple ports and are prone to variations in the soldering process, which affects the quality and reliability of connections between flexible printed circuit boards.
Innovation Solution
A signal transmission apparatus comprising a first flexible printed circuit board connected to a display module and a system, with a second flexible printed circuit board connected through a port connection member, and optionally a third board, using an alignment mark for fixation, and an interlayer conduction structure with through holes and conductive layers to replace conventional soldering, enhancing connection strength and reducing manufacturing errors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If multiple flexible printed circuit boards are electrically connected to the system through different ports, then the signals can be transmitted to the system, but the system requires larger space for multiple ports which limits size reduction
Solution Approach 1:
The patent merges multiple flexible printed circuit boards (for LCD panel, touch panel, and light source) into a single integrated flexible printed circuit board. This board contains multiple connection members that can electrically connect to corresponding connection members on a rigid printed circuit board, allowing multiple signals to be transmitted through a single port interface rather than requiring separate ports for each component.
Solution Approach 2:
The rigid printed circuit board's connection members are designed to serve multiple functions by simultaneously connecting to multiple flexible printed circuit boards. The single rigid board interface replaces multiple separate ports, making the system more compact while maintaining the ability to transmit signals from all display components.
2Reliability
If soldering is used to electrically connect flexible printed circuit boards to the rigid printed circuit board, then the connections can be established, but the soldering process is prone to variations affecting connection quality
Solution Approach 1:
The patent replaces the traditional soldering process with a mechanical insertion and engagement system. The flexible printed circuit board connection members are designed to be inserted into and mechanically engaged with corresponding connection members on the rigid printed circuit board. This mechanical connection eliminates the variability inherent in soldering processes while ensuring consistent and reliable electrical connections.
3Ease of manufacture
If manual or mechanical soldering is used to connect circuit boards, then electrical connections can be established, but the process is difficult to control and produces variations in quality
Solution Approach 1:
The patent replaces the difficult-to-control soldering process with a simple mechanical insertion and engagement system. The connection members are designed with complementary geometries that guide proper alignment and ensure consistent mechanical engagement, making the manufacturing process easier to control and eliminate quality variations associated with soldering.
Solution Approach 2:
The mechanical connection system is designed to be self-aligning and self-securing. The insertion structure includes features that automatically guide the flexible printed circuit board into the correct position and maintain stable electrical connection without requiring complex external control mechanisms, thereby simplifying the manufacturing process.
Data Source
AI summary
The present disclosure illustrates a signal transmission apparatus and a display apparatus using the same. The signal transmission apparatus comprises a first flexible printed circuit board electrically connected to a display module and a system, and comprising a port; and a second flexible printed circuit board electrically connected to the display module, and comprising a port connection member, and the port connection member corresponding to the port. The second flexible printed circuit board is electrically connected to the first flexible printed circuit board through the port connection member and the port, and is further electrically connected to the system. The signal transmission apparatus is used to replace the conventional manner of soldering multiple circuit boards for connection, so as to prevent the variation during the soldering process, and reduce errors of the manufacturing process, and improve yield rate of the display product. Furthermore, compared with the soldering manner, the signal transmission apparatus of the present disclosure improves connection strength between multiple circuit boards.