LED Flexible Substrate for Liquid Crystal Display Device
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Solution Overview
Problem
The existing liquid crystal display devices face issues with bonding defects and increased costs due to the use of Hard-PCB LED circuit boards, which can lead to short circuits and limited flexibility in fabricating multi-layered circuits.
Innovation Solution
A liquid crystal display device utilizing an LED flexible substrate with a seating portion and bent flat portions to form a flexible printed circuit, eliminating the need for bonding and allowing for thinner line widths and improved heat dissipation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If a Hard-PCB LED circuit board is used, then the structural stability is improved, but bonding defects occur and manufacturing complexity increases
Solution Approach 1:
The patent extracts the bonding process entirely by replacing the Hard-PCB with a flexible printed circuit board (FPC) that integrates the LED mounting function directly into the circuit board structure, eliminating the separate bonding operation and its associated defects
Solution Approach 2:
The patent merges the LED mounting function with the circuit board structure itself by providing integrated LED mounting portions on the FPC, combining what were previously separate components (Hard-PCB, bonding material, LED) into a single integrated flexible circuit assembly
2Stability of the object's composition
If a Hard-PCB LED circuit board is used, then the structural stability is improved, but the manufacturing cost increases
Solution Approach 1:
The patent removes the costly bonding process and bonding materials by extracting this step from the manufacturing sequence, replacing it with a simpler FPC-based LED mounting approach that reduces material costs and process complexity
Solution Approach 2:
The patent employs a flexible printed circuit board that can be manufactured more economically than rigid Hard-PCB assemblies, using flexible substrate materials and simplified manufacturing processes that reduce overall production costs
3Length of stationary object
If a Hard-PCB is used, then the width is limited, but multi-layered circuit board fabrication becomes difficult
Solution Approach 1:
The patent transitions from rigid multi-layered Hard-PCB construction to a flexible single-layer or simplified multi-layer FPC structure, using the flexibility dimension to achieve circuit routing that would otherwise require complex multi-layer rigid board fabrication
Solution Approach 2:
The patent uses a flexible printed circuit board with flexible substrate and conductive patterns that can be bent and shaped, replacing rigid multi-layer Hard-PCB structures and enabling simpler fabrication processes while maintaining electrical functionality
Data Source
AI summary
The present invention relates to a liquid crystal display device having an LED flexible substrate which requires no bonding by making a simple structural change. The liquid crystal display device includes a liquid crystal display panel, an LED for providing a light to the liquid crystal display panel, and an LED flexible substrate having a seating portion for mounting the LED thereto, and first and second flat portions bent from the seating portion perpendicular thereto respectively, to form a flexible printed circuit (FPC).