Pixel Encapsulation Structure for Color Shift Correction
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Micro light-emitting devices experience significant color shift when viewed from different angles due to variations in light emission wavelengths, which existing technologies have not effectively addressed.
Innovation Solution
A pixel encapsulating structure comprising a substrate with three light-emitting devices of different emission wavelengths, a filling material, and a first encapsulation layer with portions of varying refractive indices to correct color shift by refracting light emitted from each device, aligning wavelength distribution when viewed from off-angles with that from a normal direction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If light-emitting devices with different emission wavelengths are used, then the display color range is improved, but color shift when viewed from different angles occurs
Solution Approach 1:
The patent applies local quality by providing different encapsulation layers with specific refractive indices for different light-emitting devices emitting different wavelengths. Each encapsulation layer is locally optimized to compensate for the specific color shift characteristics of the corresponding light-emitting device, thereby maintaining color consistency across the entire display while preserving the broad color range.
Solution Approach 2:
The patent changes the refractive index parameter of the encapsulation layers to correct color shift. By selecting encapsulation materials with appropriate refractive indices matching the emission wavelengths of different light-emitting devices, the optical path is adjusted to compensate for angle-dependent color variations, thus improving color consistency without sacrificing display color range.
2Manufacturing precision
If encapsulation layers with different refractive indices are used for different light-emitting devices, then color shift is corrected, but device complexity increases
Solution Approach 1:
The patent implements local quality by assigning specific encapsulation layers with tailored refractive indices to specific light-emitting devices based on their emission characteristics. This localized optimization approach corrects color shift for each device individually while maintaining an overall systematic structure that does not excessively increase device complexity.
Solution Approach 2:
The encapsulation layers serve multiple functions: they provide physical protection for the light-emitting devices, act as optical elements with specific refractive indices to correct color shift, and maintain structural integrity of the display. This multi-functionality reduces the need for additional separate components, thereby limiting the increase in device complexity while achieving color consistency.
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 structure effectively corrects color shift by using refractive indices to refract light emitted from light-emitting devices, ensuring a consistent wavelength distribution when viewed from any angle, thereby improving display accuracy.
Implementation Method 1
One of the first encapsulation layer and the filling material has three portions respectively covering the three light-emitting devices, and two of the three portions have different refractive indices
Data Source
AI summary
A pixel encapsulating structure including a substrate, three light-emitting devices, a filling material, and a first encapsulation layer is provided. The three light-emitting devices are present on the substrate. Two of the three light-emitting devices have different emission wavelengths. The filling material is present on the substrate and the three light-emitting devices. The first encapsulation layer is present on the filling material and covers the three light-emitting devices. One of the first encapsulation layer and the filling material has three portions respectively covering the three light-emitting devices, and two of the three portions have different refractive indices.