Quantum-Dot Backplate Structure With Thinner Protective Layers

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Solution Overview

Problem

Conventional quantum-dot thin films for mini LED backlights are too thick due to multiple layers, which hinders the development of thinner and lighter display backplates required for applications like augmented reality and virtual reality devices.

Innovation Solution

A display backplate design featuring a light-emitting module with a composite protective functional layer that is thinner than conventional protective layers, allowing for a reduced overall thickness by integrating the protective functions directly into the light-emitting module, thereby eliminating the need for additional thick base material layers.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If conventional quantum-dot thin films with multiple layers are used, then protective functions are maintained, but the thickness increases

Engineering Contradiction:

Improveprotective functionsVSAvoidthickness

Core Design Contradiction:

ReliabilityVSLength of stationary object

Solution Approach 1:

The patent merges the protective layer functions into the light-emitting module structure itself. The light-emitting module includes an encapsulation adhesive layer and a light extraction layer that serve both protective and functional purposes, eliminating the need for separate conventional quantum-dot thin film layers. This integration reduces overall thickness while maintaining protective functions.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The encapsulation adhesive layer and light extraction layer perform multiple functions simultaneously: they protect the light-emitting components, enable light extraction, and serve as the interface for the quantum-dot layer. This multi-functionality replaces the need for separate dedicated protective layers, achieving thickness reduction without compromising protection.

Inventive Principle:

Principle #6Universality (Multi-functionality)

2Reliability

If multiple layers are disposed on two sides of the quantum-dot film, then protective functions are enhanced, but the overall thickness increases

Engineering Contradiction:

Improveprotective functionsVSAvoidnumber of layers

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent combines multiple protective layer functions into the light-emitting module's encapsulation adhesive layer and light extraction layer. These layers are integrated directly into the module structure, eliminating the need for separate quantum-dot thin film layers and reducing the total number of layers while maintaining comprehensive protection.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The patent extracts the protective layer functions from the conventional quantum-dot thin film structure and relocates them to the light-emitting module's encapsulation adhesive layer and light extraction layer. This extraction separates the protective function from the quantum-dot film, allowing for a thinner overall structure.

Inventive Principle:

Principle #2Taking out (Extraction)

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

This design reduces the thickness of the display backplate by 50 μm to 100 μm, enabling thinner and lighter backlight solutions that meet the requirements for mini LED backlights, improving light diffusion and extraction efficiency while maintaining protection and support functions.

Implementation Method 1

a quantum-dot module disposed on the light-emitting module, wherein the quantum-dot module comprises a quantum-dot layer disposed on the composite functional layer

Methodology Applied

Scientific EffectQuantum confinement:

Implementation Method 2

the light-emitting main body comprises a light extraction layer disposed on the light-emitting components, and the composite protective functional layer covers the light extraction layer

Methodology Applied

Scientific EffectRefraction: Refraction

Data Source

PatentUS20240038941A1Quantum-dot thin film, display backplate, and manufacuturing method of the display backplate

Publication Date: 2024.02.01 WUHAN CHINA STAR OPTOELECTRONICS SEMICONDUCTOR DISPLAY TECHNOLOGY CO LTD

AI summary

A quantum-dot thin film, a display backplate, and a manufacturing method of the display backplate are provided. The display backplate includes a light-emitting module and a quantum-dot module. The light-emitting module includes a light-emitting main body and a composite protective functional layer which are stacked. The quantum-dot module includes a quantum-dot layer disposed on the composite protective functional layer and a common protective functional layer disposed on the quantum-dot layer. A thickness of the composite protective functional layer is less than a thickness of the common protective functional layer.