Display Panel Asymmetric Capping Layers Color Purity
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Solution Overview
Problem
Existing display panels face challenges in achieving improved color purity, which is essential for high-quality image rendering.
Innovation Solution
The display panel incorporates a first display layer with a light emitting element, a color filter, and a color control layer encapsulated by capping layers. The capping layers have varying thicknesses to optimize the interaction between the light emitting element and the color control layers, enhancing color purity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If uniform thickness capping layers are used, then manufacturing simplicity is maintained, but color purity is insufficient
Solution Approach 1:
The patent applies local quality by varying the thickness of capping layers at different locations. Specifically, the first capping layer has a first thickness in a first region and a second thickness in a second region, while the second capping layer has a third thickness in the first region and a fourth thickness in the second region. This non-uniform thickness distribution is designed to optimize color purity in different regions of the display panel, allowing each region to have tailored optical properties for improved overall color performance.
2Manufacturing precision
If simple encapsulation structure is used, then device complexity is reduced, but color purity and image quality are compromised
Solution Approach 1:
The patent employs asymmetry by designing capping layers with different thickness configurations. The first capping layer has different thicknesses (first and second thicknesses) in different regions, and the second capping layer has corresponding different thicknesses (third and fourth thicknesses). This asymmetric thickness distribution creates optimized optical paths for different regions, enhancing color purity without requiring complete structural redesign of the encapsulation system.
3Reliability
If thicker capping layers are used, then encapsulation reliability is improved, but optical performance and color purity may be affected
Solution Approach 1:
The patent applies parameter changes by systematically varying the thickness parameters of the capping layers. The first capping layer has a first thickness in a first region and a second thickness in a second region, while the second capping layer has a third thickness in the first region and a fourth thickness in a second region. By optimizing these thickness parameters, the patent achieves both reliable encapsulation and enhanced color purity, as the specific thickness values are selected to balance mechanical protection with optical performance requirements.
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 significantly improves the color purity and reliability of the display panel, ensuring stable performance and enhanced image quality.
Implementation Method 1
Each of the first color control layer and the second color control layer may include a quantum dot
Data Source
AI summary
A display panel includes a display layer including a light emitting element generating a source light, a first color filter on the display layer, a first color control layer between the display layer and the first color filter and including a first surface facing the first display layer and a second surface facing the first color filter, and a plurality of capping layers encapsulating the first color control layer. Among the capping layers, a capping layer between the first surface of the first color control layer and the display layer has a first-first thickness that is different from a second-first thickness of a capping layer between the second surface of the first color control layer and the first color filter.