Conductive Backplane Protrusions for LCD Static Discharge
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Solution Overview
Problem
Liquid crystal display devices face issues with static electricity discharge, leading to electrostatic breakthrough affecting the quality and lifespan, with existing solutions increasing costs and labor due to the use of conductor pieces and potential detachment issues.
Innovation Solution
A liquid crystal display device design featuring a conductive backplane with protrusions and a conductive aluminum foil film on the front enclosure, allowing for effective static electricity discharge through an electrical path without the need for additional conductor pieces, made from plastic materials for cost control and ease of assembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conductor piece is used to connect the conductive film on the front enclosure to the backplane, then static electricity discharge is achieved, but manufacturing cost and assembly complexity increase
Solution Approach 1:
The patent removes the conductor piece from the assembly by making the backplane itself conductive. The backplane is changed from an insulating material to a conductive material, thereby extracting the need for separate conductor pieces while maintaining the static electricity discharge function through the backplane's inherent conductivity.
Solution Approach 2:
The patent merges the functions of the backplane and conductor piece by making the backplane conductive. The backplane simultaneously serves as both the structural support and the conductive path for static electricity discharge, eliminating the need for a separate conductor piece and simplifying the overall structure.
2Reliability
If a conductor piece is used to connect the conductive film to the backplane, then static electricity discharge is achieved, but manufacturing cost increases
Solution Approach 1:
The patent extracts the conductor piece from the bill of materials by making the backplane conductive. This eliminates the need to purchase and install separate conductor pieces, thereby reducing manufacturing costs while maintaining the static electricity discharge function.
Solution Approach 2:
The backplane is designed to serve multiple functions: structural support, electrical connection for the conductive film, and static electricity discharge path. This multi-functionality reduces the total component count and manufacturing cost while maintaining reliability.
3Ease of manufacture
If the front enclosure is made of plastic material for cost control, then manufacturing cost is reduced, but static electricity discharge capability is compromised
Solution Approach 1:
The patent applies local quality by adding a conductive film specifically to the inner surface of the front enclosure where electrical connection is needed. The rest of the plastic front enclosure maintains its insulating properties and cost advantages, while the localized conductive film provides the necessary static electricity discharge capability.
Solution Approach 2:
The front enclosure becomes a composite structure combining plastic material with a conductive film layer. This composite approach allows the enclosure to maintain the cost and manufacturing advantages of plastic while gaining the electrical conductivity needed for static electricity discharge through the conductive film.
4Reliability
If conductor pieces are used to connect the conductive film to the backplane, then static electricity discharge is achieved, but detachment issues and quality problems occur
Solution Approach 1:
The patent merges the backplane and conductor piece functions into a single conductive backplane structure. This eliminates the connection interface between separate components, thereby eliminating detachment issues and improving connection stability while maintaining static electricity discharge capability.
Solution Approach 2:
The patent extracts the conductor piece from the assembly, removing the potential failure point of connection detachment. The conductive backplane provides a permanent, integrated connection path that cannot detach, thereby improving reliability and connection stability.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution effectively prevents static electricity from breaking through flexible circuit boards and integrated circuits, extending the device's lifespan while maintaining a simple structure and reducing manufacturing costs.
Implementation Method 1
The conductive film has an end that is set in contact engagement with the liquid crystal display panel and an opposite end in contact engagement with the protrusions
Implementation Method 2
effectively prevents static electricity from breaking through flexible circuit boards and integrated circuits
Data Source
AI summary
The present invention provides a liquid crystal display device, which includes a backlight module, a backlight module, a mold frame arranged on the backlight module, a liquid crystal display panel arranged on the mold frame, and a front enclosure arranged on the liquid crystal display panel. The backlight module includes a backplane, a backlight source mounted in the backplane, and a light guide plate received in the backplane. The backplane is made of a conductive material and has a bottom board and side boards connected to the bottom board. At least one of the side boards forms protrusions projecting outward from an outside surface thereof. The front enclosure has an inside surface opposing said one of the side boards and including a conductive film mounted thereto and having an end in contact engagement with the liquid crystal display panel and an opposite end in contact engagement with the protrusions.