Embedded Quantum Dot Modules in Light Guide Plates

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Solution Overview

Problem

Quantum dot films used in backlight modules for LCDs are unstable when cut, leading to edge reactions with oxygen and water vapor, affecting light quality and display image performance.

Innovation Solution

A light guide plate with quantum dot modules embedded in the substrate, where the quantum dots are isolated by a layer to prevent reaction with air moisture, and the modules are arranged in an array close to the illuminating surface, eliminating the need for cutting and reducing light loss through interfaces.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of manufacture

If quantum dot film is cut and applied in the backlight module, then the quantum dot film can be installed in the display device, but the edge of the quantum dot film reacts with oxygen or water vapor in the air, causing failure and affecting light quality

Engineering Contradiction:

Improveinstallation of quantum dot filmVSAvoidstability of quantum dot film

Core Design Contradiction:

Ease of manufactureVSReliability

Solution Approach 1:

The quantum dot film is segmented into multiple quantum dot modules that are embedded into accommodation parts on the light guide plate. This segmentation allows each module to be independently positioned and protected, preventing edge reactions while maintaining installability.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The quantum dot modules are nested into accommodation parts formed on the light guide plate substrate. This nesting structure embeds the quantum dots within the light guide plate body, protecting them from air exposure while maintaining structural integration.

Inventive Principle:

Principle #7Nested doll (Nesting)

2Ease of manufacture

If quantum dot film is cut, then it can be applied in the backlight module, but the quality of the light emitted from the edge of the quantum dot film is affected

Engineering Contradiction:

Improveapplication of quantum dot filmVSAvoidlight quality

Core Design Contradiction:

Ease of manufactureVSIllumination intensity

Solution Approach 1:

The accommodation parts are pre-formed on the light guide plate before the quantum dot modules are installed. This preliminary preparation ensures that the quantum dots are immediately protected upon installation, preventing edge reactions that would degrade light quality.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The quantum dot modules are nested into the pre-formed accommodation parts, embedding them within the light guide plate structure. This eliminates exposed edges that would otherwise react with air and degrade light emission quality.

Inventive Principle:

Principle #7Nested doll (Nesting)

3Ease of manufacture

If quantum dot film is cut, then it can be installed in the backlight module, but the performance of the display image of the liquid crystal display device is influenced

Engineering Contradiction:

Improveinstallation processVSAvoiddisplay image performance

Core Design Contradiction:

Ease of manufactureVSReliability

Solution Approach 1:

The quantum dot film is divided into multiple modules that are separately embedded into accommodation parts. This segmentation allows for precise positioning and installation while protecting each module, ensuring consistent display performance without the degradation caused by cutting edges.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The quantum dot modules are nested into the light guide plate structure, integrating them securely. This embedding protects the quantum dots from air exposure that would otherwise degrade display image performance, while the modular approach maintains ease of installation.

Inventive Principle:

Principle #7Nested doll (Nesting)

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

Enhances light quality and display image performance by protecting quantum dots from air reactions and minimizing light loss, resulting in improved brightness and color gamut.

Implementation Method 1

the isolation layer covers the first surface of the substrate to make the accommodation parts and the quantum dots form the quantum dot modules, and the isolation layer is employed to isolate water vapor and oxygen

Methodology Applied

Scientific EffectPhysical barrier isolation:

Implementation Method 2

The quantum dots can be utilized to emit spectrally concentrated, very pure mono lights for achieving the better image colors

Methodology Applied

Scientific EffectPhotoluminescence: Photoluminescence

Implementation Method 3

the substrate material of molten state passes through the first predetermined gap between the first press roller and the second press roller, and cools down to form the substrate

Methodology Applied

Scientific EffectPhase change (cooling): Phase Change

Data Source

PatentUS10078166B2Light guide plate and manufacture method of light guide plate

Publication Date: 2018.09.18 TCL CHINA STAR OPTOELECTRONICS TECHNOLOGY CO LTD

AI summary

The present invention provides a light guide plate and a manufacture method of the light guide plate. The light guide plate comprises an illuminating surface and a plurality of quantum dot modules, and the quantum dot module is filled with quantum dots, and the quantum dot module is embedded in the light guide plate, and the quantum dot modules are located close to the illuminating surface and the quantum dot modules are distributed in an array.