Flexible Circuit Board Wrapping LCD Driver PCB
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Solution Overview
Problem
Existing liquid crystal display devices face difficulties in coupling the circuit board to the liquid crystal display, particularly due to the complexity of aligning and fixing the circuit board with the flexible circuit board and touch panel, which can lead to disconnection issues and reduced yield.
Innovation Solution
A liquid crystal display device design that incorporates a flexible circuit board wrapping around the circuit board, covering both the top and bottom surfaces, with direct fixation methods such as pressure-sensitive adhesive tape, solder, or clips, to simplify the coupling process and reduce the risk of disconnection, while allowing for easier alignment and installation without damaging the touch panel.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the circuit board is connected to the liquid crystal display using a flexible circuit board with direct fixation methods, then the ease of coupling is improved and disconnection risk is reduced, but the device complexity increases due to the wrapping configuration covering top and bottom surfaces
Solution Approach 1:
The flexible circuit board is configured to wrap around the circuit board in a nested manner, with the circuit board positioned within the loop formed by the flexible circuit board. The first and second ends of the flexible circuit board are connected to form this enclosing structure, creating a nested arrangement that simplifies coupling while maintaining stability.
Solution Approach 2:
The flexible circuit board extends in multiple dimensions by covering both the top surface and bottom surface of the circuit board. This multi-dimensional wrapping configuration provides enhanced mechanical stability and connection reliability through fixation at multiple locations and orientations.
2Reliability
If the flexible circuit board wraps around the circuit board covering both top and bottom surfaces, then the reliability of connection is improved, but the manufacturing precision requirements increase due to alignment complexity
Solution Approach 1:
The flexible circuit board is pre-formed with the wrapping configuration and connection ends before final assembly. This preliminary preparation of the flexible circuit board structure allows for easier alignment and fixation during manufacturing, reducing the precision requirements compared to forming the complete wrapping structure during assembly.
Solution Approach 2:
The flexible circuit board utilizes the flexibility and conformability of thin film structures to wrap around the circuit board. This flexibility allows the circuit board to be positioned and fixed without requiring extremely precise alignment, as the flexible material can accommodate minor positioning variations while maintaining reliable connection.
3Ease of manufacture
If direct fixation methods such as pressure-sensitive adhesive tape or solder are used, then the ease of manufacture is improved, but the strength of connection may be compromised compared to mechanical fastening
Solution Approach 1:
The invention combines multiple fixation methods - the flexible circuit board wrapping structure provides mechanical constraint through the nested configuration, while additional fixation elements such as pressure-sensitive adhesive tape or solder are applied to enhance the connection strength. This merging of mechanical wrapping with chemical or thermal bonding achieves both ease of manufacture and strong connection.
Data Source
AI summary
The instant application describes a liquid crystal display device comprising: a liquid crystal display; a circuit board including a top surface, a bottom surface, and a drive circuit for driving the liquid crystal display; and a flexible circuit board for connecting the liquid crystal display and the circuit board to each other. The flexible circuit board includes a first end connected to the liquid crystal display and a second end connected to the bottom surface of the circuit board. The flexible circuit board is configured to wrap around the circuit board, covering the top surface and the bottom surface of the circuit board. The top surface of the circuit board is fixed to the flexible circuit board.