Flexible Display Panel Repulsion Layer Cell Thickness

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Solution Overview

Problem

Flexible liquid crystal display panels face challenges in maintaining uniform cell thickness due to excessive softness, leading to issues like light leakage and mura defects caused by high spacer density, which affects displaying quality.

Innovation Solution

Incorporating a repulsion layer with magnetic particles of the same polarity on both flexible substrates to provide a repulsive force that maintains a uniform distance between them, thereby stabilizing cell thickness and improving display quality.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Manufacturing precision

If the density of the spacer is increased to maintain uniform cell thickness, then the cell thickness uniformity is improved, but the possibility of rubbing mura defect increases and friction increases causing light leakage

Engineering Contradiction:

Improvecell thickness uniformityVSAvoiddisplay quality

Core Design Contradiction:

Manufacturing precisionVSReliability

Solution Approach 1:

The patent introduces a repulsion layer as an intermediary component between the array substrate and color filter substrate. This repulsion layer, containing magnetic particles with the same polarity, generates a repulsive force that prevents the substrates from adhering to each other, thereby maintaining cell thickness uniformity without requiring high spacer density, thus avoiding rubbing mura defects and light leakage issues

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The patent replaces the purely mechanical support system (spacers) with a magnetic field-based repulsion system. By doping magnetic particles into the repulsion layer, the patent uses magnetic repulsion forces to maintain cell thickness, substituting the need for high-density mechanical spacers and thereby eliminating the associated defects

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

2Manufacturing precision

If the density of the spacer is increased to maintain uniform cell thickness, then the cell thickness uniformity is improved, but the friction increases preventing position recovery

Engineering Contradiction:

Improvecell thickness uniformityVSAvoidposition recovery

Core Design Contradiction:

Manufacturing precisionVSEase of operation

Solution Approach 1:

The repulsion layer acts as a mediator that reduces friction between substrates by introducing magnetic repulsion forces. This allows the substrates to slide smoothly over each other and recover their original positions without being hindered by excessive friction from high-density spacers

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The patent substitutes the high-friction mechanical contact system (high-density spacers) with a low-friction magnetic field interaction system, enabling easy position recovery when substrates are displaced

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

3Adaptability or versatility

If the flexible substrate is made softer to achieve flexibility, then the bendability is improved, but the cell thickness becomes uneven

Engineering Contradiction:

Improveflexibility and bendabilityVSAvoidcell thickness uniformity

Core Design Contradiction:

Adaptability or versatilityVSManufacturing precision

Solution Approach 1:

The patent applies the counterweight principle by introducing a repulsion force that counteracts the softness-induced deformation of the flexible substrate. The magnetic repulsion from the repulsion layer provides an opposing force that maintains cell thickness uniformity even when the substrate is soft and flexible

Inventive Principle:

Principle #8Anti-weight (Counterweight)

Solution Approach 2:

The patent replaces the mechanical rigidity approach (using rigid spacers) with a magnetic field approach, allowing the substrate to remain soft and flexible while still maintaining uniform cell thickness through magnetic repulsion forces

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

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 repulsion layer effectively maintains a uniform cell thickness, reducing the need for high spacer density and minimizing defects like light leakage, resulting in enhanced displaying effects for flexible display panels.

Implementation Method 1

both of the first substrate and the second substrate are provided with a repulsion layer therein, which enables the first substrate and the second substrate to repel each other... the repulsion layer comprises magnetic particles with the same polarity

Methodology Applied

Scientific EffectMagnetic repulsion: Magnetism

Data Source

PatentUS10025125B2Display panel and display apparatus

Publication Date: 2018.07.17 BOE TECHNOLOGY GROUP CO LTD

AI summary

This disclosure pertains to the technical field of liquid crystal display, and in particular to a display panel and a display apparatus. This display panel comprises a first substrate and a second substrate provided by cell-assembling, wherein the first substrate and the second substrate are both flexible and bendable, and wherein both of the first substrate and the second substrate are provided with a repulsion layer therein, which enables the first substrate and the second substrate to repel each other. By the addition of the repulsion layer to the display panel, the effect of maintaining a uniform cell thickness of the flexible display panel is achieved and the display panel is allowed to have a better displaying effect.