Conductive Tape Discharge Path for LCD Static Electricity

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Solution Overview

Problem

Static electricity can damage driving chips and printed circuit boards in liquid crystal display devices, particularly due to external factors and voltage tests, leading to signal distortion and reliability issues.

Innovation Solution

A display device design incorporating a conductive tape with an uneven pattern, attached to both the top and bottom chassis, which provides a discharge path for static electricity, reducing its impact on internal components and improving display quality and reliability.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Strength

If a metal top chassis is used to protect internal components, then mechanical protection is improved, but static electricity damage risk increases

Engineering Contradiction:

Improvemechanical protectionVSAvoidstatic electricity damage

Core Design Contradiction:

StrengthVSObject-affected harmful factors

Solution Approach 1:

A conductive tape is introduced as an intermediary component between the metal top chassis and the internal components (driving chip-mounted film and printed circuit board). The conductive tape serves as a mediator that provides a controlled discharge path for static electricity, preventing it from directly damaging the sensitive internal components while allowing the metal chassis to maintain its mechanical protection function.

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The conductive tape converts the harmful static electricity that accumulates on the metal chassis into a beneficial protective mechanism. By providing a controlled discharge path through the conductive tape, the static electricity is safely directed away from sensitive components, transforming the potential harm into a protective function that enhances overall device reliability.

Inventive Principle:

Principle #22Blessing in disguise (Convert harm into benefit)

2Reliability

If static electricity discharge path is added to protect components, then reliability is improved, but device complexity increases

Engineering Contradiction:

Improvecomponent protectionVSAvoidstructure complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The conductive tape is implemented as a thin, flexible component that can be easily attached to the inner surface of the top chassis. This thin-film approach provides the necessary static electricity discharge functionality without adding significant structural complexity or volume to the device. The tape's flexibility allows it to conform to the chassis surface and integrate seamlessly into the existing device architecture.

Inventive Principle:

Principle #30Flexible shells and thin films

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 conductive tape effectively reduces or prevents damage from static electricity, enhancing the reliability and display quality of the device by directing external static electricity away from sensitive components.

Implementation Method 1

a conductive tape attached to the bottom chassis and the top chassis... providing a discharge path for static electricity

Methodology Applied

Scientific EffectElectrical conduction: Conduction (electrical)

Data Source

PatentUS10082691B2Display device

Publication Date: 2018.09.25 SAMSUNG DISPLAY CO LTD

AI summary

A display device may include a display panel, a light source configured to provide light to the display panel, a bottom chassis in which the light source is located, a top chassis coupled to the bottom chassis and covering an edge of the display panel, and a conductive tape attached to the bottom chassis and the top chassis. The conductive tape may have an uneven pattern.