Segmented Light Conversion Member for LED Displays

Solution Overview

Problem

Current display devices using LEDs for light conversion suffer from energy loss and reduced brightness due to inefficient wavelength conversion, particularly when converting light into multiple colors without proper regional classification.

Innovation Solution

A light conversion member with distinct regions, each containing specific light conversion particles, is used to convert the light source's wavelength into different colors, reducing energy loss by preventing two-step wavelength conversion and enhancing brightness.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If light is converted into multiple colors without regional classification, then color variety is achieved, but energy loss increases and brightness decreases

Engineering Contradiction:

Improvecolor varietyVSAvoidenergy loss

Core Design Contradiction:

Adaptability or versatilityVSLoss of energy

Solution Approach 1:

The light conversion member is divided into multiple distinct regions, with each region containing light conversion particles optimized for converting light to a specific color. This segmentation prevents two-step wavelength conversion and reduces energy loss while achieving color variety.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Each region within the light conversion member has specialized light conversion particles tailored for specific wavelength conversion needs. This local optimization ensures that light is converted directly to the desired color in each region, improving brightness and reducing energy loss.

Inventive Principle:

Principle #3Local quality

2Adaptability or versatility

If light is converted into multiple colors without regional classification, then color variety is achieved, but brightness decreases

Engineering Contradiction:

Improvecolor varietyVSAvoidbrightness

Core Design Contradiction:

Adaptability or versatilityVSIllumination intensity

Solution Approach 1:

The light conversion member is divided into multiple distinct regions, with each region containing light conversion particles optimized for converting light to a specific color. This segmentation prevents two-step wavelength conversion and reduces energy loss while achieving color variety.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Each region within the light conversion member has specialized light conversion particles tailored for specific wavelength conversion needs. This local optimization ensures that light is converted directly to the desired color in each region, improving brightness and reducing energy loss.

Inventive Principle:

Principle #3Local quality

3Adaptability or versatility

If two-step wavelength conversion is used, then multiple colors are produced, but energy loss increases

Engineering Contradiction:

Improvecolor productionVSAvoidenergy efficiency

Core Design Contradiction:

Adaptability or versatilityVSUse of energy by moving object

Solution Approach 1:

The light conversion member is divided into multiple distinct regions, with each region containing light conversion particles optimized for converting light to a specific color. This segmentation prevents two-step wavelength conversion and reduces energy loss while achieving color variety.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Each region within the light conversion member has specialized light conversion particles tailored for specific wavelength conversion needs. This local optimization ensures that light is converted directly to the desired color in each region, improving brightness and reducing energy loss.

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 solution improves light conversion efficiency and reduces energy loss by classifying conversion regions by color, resulting in improved brightness and color accuracy in display devices.

Implementation Method 1

a light conversion member to convert a wavelength of light generated from the light source... a first region to convert first light generated from the light source into second light... and a second region to convert the first light generated from the light source into third light

Methodology Applied

Scientific EffectPhotoluminescence: Photoluminescence

Data Source

PatentUS9976722B2Display device and light conversion member

Publication Date: 2018.05.22 LG INNOTEK CO LTD

AI summary

A display device includes a light source, and a light conversion member to convert a wavelength of light generated from the light source. The light conversion member includes a first region to convert first light generated from the light source into a second light, and a second region to convert the first light generated from the light source into a third light. The second light has a wavelength longer than that of the third light. The first region is closer to the light source than the second region.