Micro LED Light Conversion Structure to Prevent Crosstalk

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

Conventional micro LED display devices with thick protection substrates suffer from crosstalk or wave guiding problems, which degrade display quality and increase thickness and weight.

Innovation Solution

A micro LED display device structure that includes an epitaxial structure layer with micro LEDs, a connection layer, a light conversion layer, and a transparent layer, where the ratio of the transparent layer's thickness to the light conversion portion's width is between 0.1 and 40, and the transparent layer's thickness is less than or equal to 20 μm, effectively reducing the need for a thick protection substrate.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If a thick protection substrate (100 μm or thicker) is attached to protect internal components from moisture and oxygen, then protection reliability is improved, but device thickness and weight increase significantly

Engineering Contradiction:

Improveprotection reliabilityVSAvoiddevice thickness

Core Design Contradiction:

ReliabilityVSLength of stationary object

Solution Approach 1:

The patent extracts and removes the thick protection substrate (100 μm or thicker) from the display device structure. By eliminating this bulky protective layer while maintaining protection functionality through alternative means, the device thickness is significantly reduced without sacrificing protection reliability.

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The patent employs thin film structures to replace the thick protection substrate. These thin films provide the necessary protection against moisture and oxygen while maintaining a much smaller thickness profile, thus resolving the contradiction between protection reliability and device thickness.

Inventive Principle:

Principle #30Flexible shells and thin films

2Reliability

If a thick protection substrate (100 μm or thicker) is attached to protect internal components from moisture and oxygen, then protection reliability is improved, but device weight increases significantly

Engineering Contradiction:

Improveprotection reliabilityVSAvoiddevice weight

Core Design Contradiction:

ReliabilityVSWeight of stationary object

Solution Approach 1:

The patent extracts and removes the thick protection substrate (100 μm or thicker) from the display device structure. By eliminating this bulky protective layer while maintaining protection functionality through alternative means, the device weight is significantly reduced without sacrificing protection reliability.

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The patent employs thin film structures to replace the thick protection substrate. These thin films provide the necessary protection against moisture and oxygen while maintaining a much smaller weight, thus resolving the contradiction between protection reliability and device weight.

Inventive Principle:

Principle #30Flexible shells and thin films

3Reliability

If a thick protection substrate is used, then protection reliability is improved, but crosstalk and wave guiding problems occur that degrade display quality

Engineering Contradiction:

Improveprotection reliabilityVSAvoidcrosstalk and wave guiding problems

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The patent extracts and removes the thick protection substrate that causes optical interference. By eliminating this substrate, the crosstalk and wave guiding problems are resolved, improving display quality while maintaining protection reliability through alternative thin film structures.

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 configuration prevents crosstalk and wave guiding issues, enhancing display quality while significantly reducing the thickness and weight of the micro LED display device.

Implementation Method 1

the light conversion layer is fixed on the epitaxial structure layer through the connection layer and comprises a plurality of light conversion portions

Methodology Applied

Scientific EffectPhotoluminescence: Photoluminescence

Implementation Method 2

the display device that uses the quantum dots technology to perform light color conversion

Methodology Applied

Scientific EffectQuantum dot light color conversion:

Data Source

PatentUS12211960B2Micro light-emitting diode display device and manufacturing method thereof

Publication Date: 2025.01.28 PLAYNITRIDE DISPLAY CO LTD

AI summary

A micro LED display device includes an epitaxial structure layer, a connection layer, a light conversion layer and a transparent layer. The epitaxial structure layer includes a plurality of micro LEDs disposed apart from each other. The connection layer is disposed at one side of the epitaxial structure layer away from the micro LEDs. The light conversion layer is fixed on the epitaxial structure layer through the connection layer and includes a plurality of light conversion portions. Each of the light conversion portions corresponds to one of the micro LEDs. The transparent layer is disposed at one side of the light conversion layer away from the epitaxial structure layer. The ratio of the thickness of the transparent layer to the width of each light conversion portion is between 0.1 and 40. A manufacturing method of the micro LED display device is also provided.