Insulation Layer Contacts Color Conversion and Filter Layers
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Solution Overview
Problem
Current display devices with color conversion layers using semiconductor nanocrystals face challenges in simplifying the manufacturing process and achieving excellent barrier characteristics.
Innovation Solution
A display device design incorporating a color conversion portion with a first and second color conversion layer, a transmissive portion, and an insulation layer, where the insulation layer is made of a polysilazane-based compound and contacts both the color conversion and filter layers, simplifying the manufacturing process and enhancing barrier characteristics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If multiple separate layers are used for color conversion and filtering, then color accuracy is improved, but manufacturing complexity increases
Solution Approach 1:
The patent combines the color conversion layer and color filter layer into a single integrated structure where quantum dots are deposited directly on the color filter layer. This merging eliminates the need for separate manufacturing processes for each layer while maintaining color accuracy, as the quantum dots and filters work together in a unified configuration.
Solution Approach 2:
The color filter layer serves dual functions: it acts as both the color filtering element and the substrate for quantum dot deposition. This multi-functionality reduces the total number of layers required while maintaining both color accuracy and simplifying the manufacturing process.
2Manufacturing precision
If multiple separate layers are used for color conversion and filtering, then color purity is improved, but the number of manufacturing steps increases
Solution Approach 1:
By merging the color conversion and filtering functions into a single integrated layer structure, the patent reduces the number of manufacturing steps while maintaining color purity. The quantum dots and color filters are formed in an integrated process rather than as separate sequential steps.
3Reliability
If insulation layer is positioned only between specific layers, then electrical insulation is improved, but structural simplicity is reduced
Solution Approach 1:
The insulation layer is positioned to serve multiple functions simultaneously: it provides electrical insulation between the color conversion layer and color filter layer, acts as a structural support layer, and serves as a base for subsequent layer deposition. This multi-functionality maintains electrical insulation while reducing overall structural complexity.
Data Source
AI summary
A display device includes: a display portion including a plurality of pixels; and a color conversion portion overlapping the display portion. The color conversion portion includes: a first color conversion portion, a second color conversion portion, a transmissive portion, and a light blocking portion, the first color conversion portion includes: a first color conversion layer including first semiconductor nanocrystals and a first color filter overlapping the first color conversion layer, the second color conversion portion includes: a second color conversion layer including second semiconductor nanocrystals and a second color filter overlapping the second color conversion layer, and the transmissive portion includes: a transmissive layer. The color conversion portion further includes an insulation layer positioned between the first color conversion layer and the first color filter, and the insulation layer contacts both the first color conversion layer and the first color filter.