Light-Diffusion Layer Structure for Uniform LED Display Emission
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Solution Overview
Problem
Display devices using light emitting diodes face challenges in achieving uniform light emission without deteriorating optical characteristics, particularly when a separate light diffusion member is added, which can affect luminance.
Innovation Solution
A display device structure incorporating a light emitting element with a light diffusion layer containing particles like silver nanowires, gold nanowires, or titanium oxide, strategically positioned to enhance light uniformity without compromising optical characteristics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a separate light diffusion member is added to improve light uniformity, then light uniformity is improved, but optical characteristics such as luminance are deteriorated
Solution Approach 1:
The patent combines the light diffusion function with the encapsulation structure by forming the light diffusion layer within the encapsulation resin that already surrounds the light emitting element. This integration eliminates the need for separate light diffusion members while maintaining both light uniformity and optical characteristics.
Solution Approach 2:
The patent introduces a light diffusion layer as an intermediary component between the light emitting element and the external environment. This layer uses light diffusion particles to scatter light and improve uniformity while being transparent enough to preserve luminance, acting as a mediator that balances both requirements.
2Illumination intensity
If light diffusion particles are added to the encapsulation resin, then light uniformity is improved, but the structural integrity may be compromised
Solution Approach 1:
The patent applies local quality by concentrating light diffusion particles specifically in the encapsulation resin surrounding the light emitting element, rather than throughout the entire device structure. This localized application provides light uniformity where needed while preserving the overall structural integrity of the device.
Solution Approach 2:
The patent creates a composite material by combining encapsulation resin with light diffusion particles to form the light diffusion layer. This composite structure integrates the optical function of light diffusion with the protective and structural function of the encapsulation resin, achieving both light uniformity and structural integrity.
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 solution provides improved light uniformity in display devices without degrading optical characteristics, such as luminance, by using a light diffusion layer with specific particles to diffuse light emitted from point sources, effectively addressing the issue of non-uniformity.
Implementation Method 1
a light diffusion layer on the second insulating layer and including a light diffusion particle
Data Source
AI summary
A display device includes a substrate; a first electrode and a second electrode arranged to be spaced apart from each other on the substrate; a first insulating layer on the substrate; a light emitting element on the first insulating layer, located between the first electrode and the second electrode, and including a first end portion and a second end portion; a third electrode on the substrate and electrically connected to the first electrode and the first end portion; a fourth electrode on the substrate and electrically connected to the second electrode and the second end portion; a second insulating layer on the substrate and covering the light emitting element, the third electrode, and the fourth electrode; and a light diffusion layer on the second insulating layer and including a light diffusion particle.