Low Refractive Layer Layout for Cost-Competitive Color Conversion Displays

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

Existing display devices face challenges in securing cost competitiveness due to high material costs and inefficiencies in the application of low refractive materials.

Innovation Solution

A display device design that incorporates a low refractive layer disposed in the opening of a bank, reducing the amount of low refractive material required and enhancing cost competitiveness.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Illumination intensity

If low refractive material is applied extensively to achieve optimal display quality, then display quality is improved, but material cost increases

Engineering Contradiction:

Improvedisplay qualityVSAvoidmaterial cost

Core Design Contradiction:

Illumination intensityVSQuantity of substance

Solution Approach 1:

The patent applies low refractive material selectively only in the opening region of the bank structure, rather than uniformly across the entire display surface. This localized application maintains the optical benefits where needed (in the pixel opening) while reducing overall material consumption and cost.

Inventive Principle:

Principle #3Local quality

2Illumination intensity

If low refractive material is applied uniformly across the entire surface, then display quality is maximized, but the amount of material required increases

Engineering Contradiction:

Improvedisplay qualityVSAvoidmaterial consumption

Core Design Contradiction:

Illumination intensityVSLoss of substance

Solution Approach 1:

The patent extracts the low refractive material application from the entire surface and confines it only to the necessary region (the opening of the bank). This extraction eliminates unnecessary material application in non-critical areas while preserving the optical performance in the functional region.

Inventive Principle:

Principle #2Taking out (Extraction)

3Quantity of substance

If low refractive layer is disposed only in the opening of the bank, then material cost is reduced, but display quality may be compromised

Engineering Contradiction:

Improvematerial costVSAvoiddisplay quality

Core Design Contradiction:

Quantity of substanceVSIllumination intensity

Solution Approach 1:

The patent strategically places the low refractive material in the opening region where it most effectively influences light extraction and display quality. This localized positioning ensures optimal performance in the critical optical path while minimizing material usage.

Inventive Principle:

Principle #3Local quality

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 implementation of the low refractive layer in the display device reduces material costs while maintaining or improving display quality, thereby securing cost competitiveness.

Implementation Method 1

a low refractive layer disposed on the color conversion layer in the opening

Methodology Applied

Scientific EffectRefraction: Refraction

Data Source

PatentUS12211965B2Display device with low refractive layer disposed on color conversion layer

Publication Date: 2025.01.28 SAMSUNG DISPLAY CO LTD

AI summary

A display device includes a bank including an opening defining a plurality of pixels; a plurality of light emitting elements disposed in the plurality of pixels; a color conversion layer disposed on the plurality of light emitting elements in the opening; and a low refractive layer disposed on the color conversion layer in the opening.