Display Module Charge-Discharge Layout for Static Shielding

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Solution Overview

Problem

Existing display modules suffer from static electricity accumulation due to the generation of charges on protective cover plates, leading to issues like green shift and four-split screen displays, which negatively affect the display panel's performance.

Innovation Solution

Incorporating a conductive shielding layer on the display panel and a conductive film on the cover plate, connected to the shielding layer, to effectively discharge static electricity and prevent its accumulation on the display panel.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If a protective cover plate with anti-fingerprint layer is used, then the display module gains protection and anti-fingerprint properties, but static electricity accumulates on the cover plate surface causing display anomalies

Engineering Contradiction:

Improveprotective cover plate protectionVSAvoidstatic electricity accumulation

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

A conductive layer is introduced as an intermediary between the cover plate and display panel. This conductive layer receives charges from the cover plate through electrical connection and conducts them to the display panel, preventing static electricity accumulation on the cover plate surface while maintaining the protective function.

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The harmful static electricity charges are extracted from the cover plate surface through the conductive layer connection. By providing a charge discharge path, the accumulated charges are removed from the cover plate, eliminating the harmful effect while preserving the protective cover plate's protective properties.

Inventive Principle:

Principle #2Taking out (Extraction)

2Ease of operation

If the cover plate is rubbed during use or testing, then touch function is activated or tested, but large amounts of charges are generated causing static electricity accumulation

Engineering Contradiction:

Improvetouch functionVSAvoidcharge generation

Core Design Contradiction:

Ease of operationVSObject-generated harmful factors

Solution Approach 1:

The friction-generated charges, which were previously harmful causing static electricity accumulation, are converted into a beneficial effect. The conductive layer provides a controlled discharge path that safely conducts these charges to the display panel, preventing harmful accumulation while allowing normal touch operation to function.

Inventive Principle:

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

Solution Approach 2:

The conductive layer serves as an intermediary that manages the charge generation process. It receives charges generated during normal touch operation and provides a controlled pathway for charge dissipation, preventing harmful static electricity buildup while maintaining ease of operation.

Inventive Principle:

Principle #24Intermediary (Mediator)

3Reliability

If static electricity accumulates on the display panel, then the display panel experiences green shift or four-split screen display anomalies

Engineering Contradiction:

Improvedisplay panel performanceVSAvoiddisplay quality

Core Design Contradiction:

ReliabilityVSManufacturing precision

Solution Approach 1:

The conductive layer acts as an intermediary charge management system between the cover plate and display panel. It prevents excessive charge accumulation on the display panel by providing a controlled discharge path, thereby maintaining both reliability and manufacturing precision in display quality.

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The conductive layer provides beforehand cushioning against static electricity accumulation. By establishing a charge discharge path in advance, it prevents the buildup of charges that would otherwise cause display anomalies, protecting the display quality before the harmful effect occurs.

Inventive Principle:

Principle #11Beforehand cushioning (Prior cushioning)

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 significantly reduces the impact of static electricity on the display panel, enhancing its reliability and preventing display anomalies such as green shift and four-split screen issues.

Implementation Method 1

the conductive film is connected to the cover plate and the conductive shielding layer separately... the conductive film conducts charges to the conductive shielding layer so as to discharge the static electricity

Methodology Applied

Scientific EffectElectrical conduction: Conduction (electrical)

Implementation Method 2

The conductive shielding layer is located on a side of the display panel... the conductive film conducts charges to the conductive shielding layer so as to discharge the static electricity, thereby reducing the effect of the static electricity on the display panel

Methodology Applied

Scientific EffectElectrostatic shielding: Faraday Cage

Data Source

PatentUS11917857B2Display module and display device

Publication Date: 2024.02.27 WUHAN TIANMA MICRO ELECTRONICS CO LTD

AI summary

Provided are a display module and display device. The display module includes a display panel, a cover plate and a conductive shielding layer. The conductive shielding layer is located on a side of the display panel, and the cover plate is located on a side of the display panel facing away from the conductive shielding layer. The display module includes a conductive film. The conductive film is located on a side of the cover plate facing the conductive shielding layer, and the conductive film is connected to the cover plate and the conductive shielding layer separately.