Antistatic Paper PCB Cover for LCD Devices
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Solution Overview
Problem
Conventional PCB protecting covers for LCD devices face challenges in balancing mechanical strength, antistatic ability, and cost, with metal covers offering high strength and antistatic properties but high costs, and plastic covers lacking antistatic ability, necessitating additional design measures.
Innovation Solution
A PCB protecting cover made from antistatic paper material, which can include a paper layer with an antistatic layer on one or both sides, or an antistatic layer between two paper layers, integrated with an antistatic agent, providing mechanical strength and antistatic properties while reducing material and production costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a metal PCB protecting cover is used, then mechanical strength and antistatic ability are improved, but material cost and mould cost increase
Solution Approach 1:
The patent applies composite materials by combining paper material with antistatic coating to create a PCB protecting cover that achieves both antistatic ability and cost-effectiveness. The paper substrate provides mechanical strength while the antistatic coating layer provides electrostatic protection, resolving the contradiction between reliability and manufacturing cost.
Solution Approach 2:
The patent changes the material parameters by transitioning from traditional metal or plastic to paper-based material with antistatic properties. This parameter change in material composition allows the cover to achieve antistatic ability while significantly reducing material and mould costs compared to metal alternatives.
2Ease of manufacture
If a plastic PCB protecting cover is used, then material cost is reduced, but antistatic ability is lost
Solution Approach 1:
The patent creates a composite structure where paper material serves as the base and antistatic coating is applied as a functional layer. This composite approach maintains the cost advantage of non-metal materials while adding the critical antistatic property that plain plastic lacks, thereby resolving the contradiction between cost and reliability.
3Reliability
If antistatic layer is applied on both sides of paper layer, then antistatic effect is enhanced, but material cost and processing time increase
Solution Approach 1:
The patent applies local quality by selectively coating only one side of the paper layer with antistatic material when the electronic components are located on a single side. This localized approach provides sufficient antistatic protection where needed while reducing material consumption and processing time compared to coating both sides, thereby resolving the contradiction between reliability and productivity.
Data Source
AI summary
The invention provides a PCB protective cover, an LCD device, and a method for manufacturing a PCB protective cover. The PCB protecting cover is made of an antistatic paper material. The invention provides a novel paper PCB protecting cover. The PCB protecting cover has the advantages of good mechanical strength, simple processing, and low cost, and has antistatic ability because of being added with an antistatic material, thereby greatly reducing the cost of the PCB protecting cover when satisfying the function requirement of the PCB protecting cover, and improving the overall competitiveness of the LCD device.