Display Panel Trench Layout for Moisture-Resistant Pixel Spacing

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Solution Overview

Problem

Existing display devices face issues with moisture penetration and reduced reliability due to external particles, such as moisture, affecting inorganic light-emitting elements.

Innovation Solution

A display panel design with trenches between light-emitting elements and a bending area to enhance operational reliability by preventing particle ingress.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If light-emitting elements are arranged closely to increase display resolution, then display quality is improved, but moisture penetration risk increases

Engineering Contradiction:

Improvedisplay resolutionVSAvoidmoisture resistance

Core Design Contradiction:

Measurement precisionVSReliability

Solution Approach 1:

The patent introduces trenches between adjacent light-emitting elements to segment the display structure into isolated regions. These trenches act as moisture barriers that prevent water penetration while maintaining close spacing of light-emitting elements for high resolution display.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent employs an encapsulation layer as an intermediary substance between the light-emitting elements and the external environment. This encapsulation layer fills the trenches and provides a protective barrier against moisture while allowing the elements to remain closely spaced.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Reliability

If trenches are introduced to prevent moisture penetration, then reliability is improved, but device complexity increases

Engineering Contradiction:

Improvemoisture resistanceVSAvoidstructure complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent uses thin film encapsulation layers to line the trenches and cover the light-emitting elements. These thin films provide effective moisture protection while adding minimal structural complexity and maintaining a compact device profile.

Inventive Principle:

Principle #30Flexible shells and thin films

3Illumination intensity

If different sized light-emitting elements are used for different colors, then display performance is improved, but manufacturing precision requirements increase

Engineering Contradiction:

Improvedisplay performanceVSAvoidelement placement precision

Core Design Contradiction:

Illumination intensityVSManufacturing precision

Solution Approach 1:

The patent applies different trench depths and encapsulation layer configurations to different regions corresponding to different colored light-emitting elements. This local customization allows optimization of each element's protection and positioning while accommodating size variations without requiring uniform high-precision manufacturing across all elements.

Inventive Principle:

Principle #3Local quality

Data Source

PatentUS20250374730A1Display panel and display device including the same

Publication Date: 2025.12.04 LG DISPLAY CO LTD

AI summary

A display panel and a display device including the same are disclosed. A display panel according to the present specification may include a first light-emitting element having a first size and implementing a first color, a second light-emitting element having a second size different from the first size and implementing a second color, a third light-emitting element having a third size different from the first size and implementing a third color, and a trench formed between the second light-emitting element and the third light-emitting element. According to the present specification, a design margin of a display device may be secured.