Color Conversion Panel With Multilayer SiON Capping for Stain Control

Solution Overview

Problem

Existing color conversion panels suffer from stain generation while attempting to increase color conversion efficiency.

Innovation Solution

A color conversion panel with a capping layer composed of a multi-layer structure of SiON having different nitrogen and oxygen compositions, where the first layer is N-rich and the second layer is O-rich, is used to prevent stain generation while enhancing efficiency.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If a single-layer SiON capping layer is used to increase color conversion efficiency, then color conversion efficiency is improved, but stain generation occurs

Engineering Contradiction:

Improvecolor conversion efficiencyVSAvoidstain generation

Core Design Contradiction:

ProductivityVSObject-affected harmful factors

Solution Approach 1:

The capping layer is divided into multiple layers (first SiON layer and second SiON layer) with different nitrogen and oxygen compositions. This segmentation allows each layer to perform different functions: the first layer optimizes for color conversion efficiency while the second layer prevents stain generation, thereby resolving the contradiction between efficiency improvement and stain prevention.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Different regions of the capping layer structure are assigned different material compositions tailored to local requirements. The first SiON layer has a composition optimized for enhancing color conversion, while the second SiON layer has a composition specifically designed to prevent stains. This local differentiation of material properties enables simultaneous achievement of high efficiency and stain resistance.

Inventive Principle:

Principle #3Local quality

2Productivity

If SiON composition is optimized for color conversion efficiency, then efficiency is improved, but stain resistance deteriorates

Engineering Contradiction:

Improvecolor conversion efficiencyVSAvoidstain resistance

Core Design Contradiction:

ProductivityVSReliability

Solution Approach 1:

The capping layer is divided into multiple layers (first SiON layer and second SiON layer) with different nitrogen and oxygen compositions. This segmentation allows each layer to perform different functions: the first layer optimizes for color conversion efficiency while the second layer prevents stain generation, thereby resolving the contradiction between efficiency improvement and stain prevention.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Different regions of the capping layer structure are assigned different material compositions tailored to local requirements. The first SiON layer has a composition optimized for enhancing color conversion, while the second SiON layer has a composition specifically designed to prevent stains. This local differentiation of material properties enables simultaneous achievement of high efficiency and stain resistance.

Inventive Principle:

Principle #3Local quality

Data Source

PatentUS12411273B2Color conversion panel and display device including the same

Publication Date: 2025.09.09 SAMSUNG DISPLAY CO LTD

AI summary

A color conversion panel including: a first substrate; light blocking members disposed on the first substrate while being separated from each other; a first color conversion layer, a second color conversion layer, and a transmissive layer that are respectively disposed between the light blocking members; and a capping layer disposed on the first color conversion layer, the second color conversion layer, and the transmissive layer. The capping layer is a multi-layer structure containing SiON having different compositions.