Display Optical Pattern Layout for Front Luminance Redirection

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Solution Overview

Problem

Existing display devices struggle to maximize luminance in the front direction due to light being directed towards the sides rather than the front.

Innovation Solution

The use of organic patterns with varying refractive indices and angles to refract and totally reflect light towards the front, combined with a touch electrode configuration to reduce parasitic capacitance and enhance touch sensitivity.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Illumination intensity

If light-emitting elements are arranged in conventional configurations, then device structure is simple, but luminance in the front direction is insufficient

Engineering Contradiction:

Improveluminance in front directionVSAvoidstructure complexity

Core Design Contradiction:

Illumination intensityVSDevice complexity

Solution Approach 1:

The patent applies local quality by creating organic patterns with different refractive indices at specific locations between light-emitting elements. The first organic pattern has a first refractive index while the second organic pattern has a second refractive index, allowing different light paths and directions in different regions to redirect light toward the front direction

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The patent changes the refractive index parameter of the organic materials to control light propagation. By selecting organic materials with specific refractive indices (first refractive index and second refractive index) for different patterns, the patent manipulates light refraction and reflection to increase front-direction luminance

Inventive Principle:

Principle #35Parameter changes

2Illumination intensity

If organic patterns with different refractive indices are introduced to redirect light, then front direction luminance increases, but manufacturing complexity increases

Engineering Contradiction:

Improvefront direction luminanceVSAvoidmanufacturing process simplicity

Core Design Contradiction:

Illumination intensityVSEase of manufacture

Solution Approach 1:

The patent segments the organic layer into multiple distinct patterns (first organic pattern and second organic pattern) with different refractive indices, positioned at specific locations between light-emitting elements. This segmentation allows independent optimization of each pattern's function while maintaining overall manufacturability through established deposition techniques

Inventive Principle:

Principle #1Segmentation

3Illumination intensity

If light is redirected toward the front direction, then luminance improves, but light loss in other directions increases

Engineering Contradiction:

Improvefront direction luminanceVSAvoidlight energy distribution

Core Design Contradiction:

Illumination intensityVSLoss of energy

Solution Approach 1:

The patent converts the potentially harmful effect of light traveling in unwanted directions into a beneficial outcome. By strategically placing organic patterns with specific refractive indices, light that would otherwise be lost is redirected through refraction and total internal reflection to contribute to front-direction luminance, turning energy loss into useful illumination

Inventive Principle:

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

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

Increases luminance on the front side of the display device while improving touch sensitivity by redirecting light and reducing capacitance.

Implementation Method 1

A refractive index of the first organic pattern, a refractive index of the second organic pattern and a refractive index of the third organic pattern are each smaller than a refractive index of the fourth organic pattern

Methodology Applied

Scientific EffectRefraction: Refraction

Implementation Method 2

an angle formed by a side surface of the first organic pattern and a lower surface of the first organic pattern may be smaller than a first angle. The first angle may be a critical angle at which total reflection of light occurs between the first organic pattern and the fourth organic pattern

Methodology Applied

Scientific EffectTotal internal reflection: Total Internal Reflection

Data Source

PatentUS20260076076A1Display device and electronic device including the same

Publication Date: 2026.03.12 SAMSUNG DISPLAY CO LTD

AI summary

A display device includes a substrate; a plurality of light-emitting elements disposed on the substrate, the light-emitting elements being arranged in a plurality of light emitting areas, which output light, respectively; an encapsulation layer disposed on the plurality of light-emitting elements; a first organic pattern disposed on the encapsulation layer and located between adjacent ones of the light emitting areas; a second organic pattern and a third organic pattern, which are disposed on the first organic pattern, spaced apart from each other, and between the adjacent ones of the light emitting areas; and a fourth organic pattern disposed on the first organic pattern, the second organic pattern and the third organic pattern, where a refractive index of the first organic pattern, a refractive index of the second organic pattern and a refractive index of the third organic pattern are each smaller than a refractive index of the fourth organic pattern.