Quantum Dot Display Panel Without Planarization or Adhesive Layers

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Solution Overview

Problem

Conventional display panels with semiconductor nanocrystals face challenges in process complexity, thickness, weight, and light efficiency due to the inclusion of planarization layers and adhesive layers between self-emission type color conversion layers and absorption-type color filter layers.

Innovation Solution

A display panel design that eliminates planarization and adhesive layers, directly overlapping self-emission type color conversion layers with absorption-type color filter layers, utilizing quantum dots for improved light conversion, resulting in a thinner, lighter, and more efficient display panel.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If planarization layers and adhesive layers are included between self-emission type color conversion layers and absorption-type color filter layers, then structural stability and ease of manufacturing are improved, but device thickness, weight, and light efficiency deteriorate

Engineering Contradiction:

Improvestructural stabilityVSAvoiddevice thickness

Core Design Contradiction:

ReliabilityVSLength of stationary object

Solution Approach 1:

The patent removes the planarization layer and adhesive layer from the conventional display structure. By extracting these unnecessary intermediate layers, the device achieves reduced thickness and weight while maintaining structural integrity through direct contact between the color conversion layer and color filter layer.

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The patent merges the functions of multiple layers into a simplified structure where the self-emission type color conversion layer is directly overlapped with the absorption-type color filter layer. This merging eliminates intermediate layers and improves light efficiency by reducing the number of interfaces that could scatter or absorb light.

Inventive Principle:

Principle #5Merging (Combining)

2Reliability

If planarization layers and adhesive layers are included between self-emission type color conversion layers and absorption-type color filter layers, then manufacturing process stability is improved, but fabrication complexity and cost deteriorate

Engineering Contradiction:

Improvemanufacturing process stabilityVSAvoidfabrication complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent extracts and eliminates the planarization layer and adhesive layer from the fabrication process. This reduction in the number of layers simplifies the manufacturing process, reduces fabrication steps, and lowers production costs while maintaining sufficient manufacturing stability.

Inventive Principle:

Principle #2Taking out (Extraction)

3Use of energy by moving object

If quantum dots are used in color conversion layers, then light efficiency and color purity are improved, but manufacturing precision requirements increase

Engineering Contradiction:

Improvelight efficiencyVSAvoidquantum dot placement precision

Core Design Contradiction:

Use of energy by moving objectVSManufacturing precision

Solution Approach 1:

The patent employs self-emission type color conversion layers where quantum dots are excited by blue light emitting elements to emit their characteristic wavelengths. This self-service mechanism allows the quantum dots to automatically convert light wavelengths without requiring external control systems, maintaining high light efficiency while reducing manufacturing precision requirements for complex control mechanisms.

Inventive Principle:

Principle #25Self-service

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 design achieves improved processability, reduced thickness and weight, lower fabrication costs, and enhanced light efficiency with higher color purity, making it suitable for various electronic devices.

Implementation Method 1

at least one of the plurality of color conversion layers includes quantum dots

Methodology Applied

Scientific EffectPhotoluminescence: Photoluminescence

Implementation Method 2

a plurality of absorption-type color filter layers directly disposed on and having a surface shape of the plurality of color conversion layers

Methodology Applied

Scientific EffectLight absorption: Absorption (EM radiation)

Data Source

PatentUS20260068370A1Display device, electronic device, and fabrication method thereof

Publication Date: 2026.03.05 SAMSUNG ELECTRONICS CO LTD

AI summary

The present disclosure provides a display panel including: a substrate; a plurality of light emitting elements including semiconductor light emitting chips and disposed on the substrate; a plurality of color conversion layers overlapped with the plurality of light emitting elements and disposed thereon, respectively; and a plurality of absorption-type color filter layers directly disposed and having a surface shape of the plurality of color conversion layers, respectively, where a pitch between adjacent light emitting elements of the plurality of light emitting elements is less than or equal to about 100 micrometers, and at least one of the plurality of color conversion layers includes quantum dots.