Light-Emitting Module Structure to Minimize Substrate Light Interference

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Solution Overview

Problem

The epitaxial growth substrate used in forming light-emitting unit layers can interfere with light, thereby affecting the display effect in existing technologies.

Innovation Solution

A light-emitting module is designed with an electrical connection layer, a light-emitting unit layer, and a light conversion layer, where the light-emitting unit layer is either formed without an epitaxial growth substrate or has it partially covering, and an intermediate layer structure can be included between the light conversion and light-emitting unit layers, allowing for various configurations to minimize substrate influence.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Manufacturing precision

If an epitaxial growth substrate is used to form the light-emitting unit layer, then the light-emitting unit layer can be successfully formed, but the substrate influences light and deteriorates the display effect

Engineering Contradiction:

Improvelight-emitting unit layer formationVSAvoidlight influence from substrate

Core Design Contradiction:

Manufacturing precisionVSObject-affected harmful factors

Solution Approach 1:

The patent removes the epitaxial growth substrate from the final light-emitting module structure. The substrate is used only during the manufacturing process to form the light-emitting unit layer via epitaxial growth, then it is completely extracted/removed before the module is assembled. This eliminates the substrate's harmful light influence while preserving its manufacturing utility.

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The light-emitting unit layer is formed on the epitaxial growth substrate in advance during the manufacturing process. Once the layer is successfully formed with the required properties, the substrate completes its preliminary function and is then removed. This preliminary action allows the substrate to serve its manufacturing purpose without interfering with the final product performance.

Inventive Principle:

Principle #10Preliminary action

2Object-affected harmful factors

If the epitaxial growth substrate is completely removed, then the display effect is improved, but the manufacturing process becomes more difficult

Engineering Contradiction:

Improvelight influence from substrateVSAvoidmanufacturing process complexity

Core Design Contradiction:

Object-affected harmful factorsVSEase of manufacture

Solution Approach 1:

The substrate removal is integrated into the existing manufacturing flow as a standard extraction step. By planning for substrate removal from the beginning of the manufacturing process, the patent avoids adding complex post-processing steps. The extraction is performed at an optimal point in the process where it is most efficient, balancing manufacturing ease with performance improvement.

Inventive Principle:

Principle #2Taking out (Extraction)

3Device complexity

If the light conversion layer is placed directly on the light-emitting unit layer, then the structure is simplified, but the substrate's light influence cannot be minimized

Engineering Contradiction:

Improvemodule structureVSAvoidlight influence from substrate

Core Design Contradiction:

Device complexityVSObject-affected harmful factors

Solution Approach 1:

By removing the substrate entirely, the patent enables the light conversion layer to be placed directly on the light-emitting unit layer without any substrate-related interference. This extraction of the harmful element (substrate) simultaneously achieves both structure simplification and elimination of light influence, resolving the apparent contradiction.

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 helps improve the display effect by reducing the impact of the epitaxial growth substrate on light, enhancing the overall performance of the light-emitting module.

Implementation Method 1

a light conversion layer, wherein the light-emitting unit layer is provided with no epitaxial growth substrate, or is provided with an epitaxial growth substrate at least partially covering the light-emitting unit layer

Methodology Applied

Scientific EffectLight conversion: Fluorescence

Data Source

PatentUS20230352625A1Light-emitting module, display module, display screen and display

Publication Date: 2023.11.02 BEIJING IVISUAL 3D TECH CO LTD

AI summary

The present disclosure relates to the technical field of optics, and discloses a light-emitting module, comprising: an electrical connection layer, a light-emitting unit layer and a light conversion layer, wherein the light-emitting unit layer is provided with no epitaxial growth substrate, or is provided with an epitaxial growth substrate at least partially covering the light-emitting unit layer. In terms of the light-emitting module, the formed light-emitting module is provided with no epitaxial growth substrate for forming the light-emitting unit layer, or is provided with the epitaxial growth substrate at least partially covering the light-emitting unit layer, to prevent influence of the epitaxial growth substrate on light which supports display as much as possible, thereby benefiting improvement of display effect. The present disclosure further discloses a display module, a display screen and a display.