Flexible Printed Circuit Board U-Shape for Liquid Crystal Display Assembly
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Solution Overview
Problem
Existing liquid crystal display devices that overlap two panels to create a stereoscopic image face challenges in simplifying the connection of flexible printed circuit boards and optimizing material cutting efficiency, leading to increased costs and potential errors in assembly.
Innovation Solution
The use of flexible printed circuit boards with elongated and large-width portions that are folded in a U-shape, allowing for connection to a drive printed circuit board with adjustable terminal positions and multi-layered structures for improved flexibility and material cutting efficiency, enabling the same specification boards to be used for both front and rear panels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If different specifications of flexible printed circuit boards are used for front and rear panels, then connection can be achieved, but device complexity increases and assembly errors occur
Solution Approach 1:
The patent applies universality by designing a single specification of flexible printed circuit board that can be used for both front and rear panels. The FPC is designed with an elongated portion and a large-width portion that can be folded back, allowing the same board design to accommodate both panels' connection needs, thereby reducing specification variety and preventing assembly errors.
2Ease of operation
If the large-width portion extends along the elongated portion, then connection flexibility improves, but material cutting efficiency decreases
Solution Approach 1:
The patent resolves this contradiction by changing the spatial arrangement from a linear extension to a folded-back configuration. The large-width portion is folded back towards the elongated portion, creating a U-shaped or hook-like structure. This dimensional change allows the board to reach and connect to both front and rear panels while maintaining compactness that improves material cutting efficiency.
Data Source
AI summary
To long sides of a front-side liquid crystal display panel and a rear-side liquid crystal display panel on the same side, elongated portions of flexible printed circuit boards having a substantially U-shape in a plan view are respectively connected by thermo-compression bonding. Due to such a constitution, when the front-side liquid crystal display panel and the rear-side liquid crystal display panel overlapping each other use the flexible printed circuit boards having the same specification, the flexible printed circuit boards can be easily pulled around and connected to a drive printed circuit board and, at the same time, can enhance a material cutting efficiency of flexible printed circuit boards, and can provide a liquid crystal display device at a low cost.