Optical Member With Protrusion Sealing for LED Displays
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Solution Overview
Problem
Current LED-based display devices face challenges in reducing light loss and improving color uniformity, particularly in backlight units, which affect image quality and reliability.
Innovation Solution
A display device incorporating a light source, wavelength conversion particles, a receptacle with a protrusion on its inner surface, and a sealing part that contacts the protrusion to securely house the particles, enhancing chemical resistance and protection from moisture and oxygen, while the wavelength conversion particles convert light emitted from the source to produce white light with improved color reproduction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If wavelength conversion particles are used to convert light wavelength, then color purity and brightness are improved, but light loss increases and color uniformity deteriorates
Solution Approach 1:
The patent applies local quality by creating a non-uniform distribution of wavelength conversion particles within the receptacle. The particles are concentrated more densely near the light source and become sparser toward the edges, allowing each region to optimize its light conversion efficiency locally while maintaining overall color uniformity across the display panel.
Solution Approach 2:
The patent introduces a spatial dimension to particle arrangement by positioning particles at different distances from the light source along the optical path. This three-dimensional arrangement allows particles at different positions to convert light differently, optimizing both brightness and reducing light loss through progressive wavelength conversion along the light path.
2Illumination intensity
If wavelength conversion particles are used to convert light wavelength, then color purity is improved, but color uniformity deteriorates
Solution Approach 1:
The patent applies local quality by creating a non-uniform distribution of wavelength conversion particles within the receptacle. The particles are concentrated more densely near the light source and become sparser toward the edges, allowing each region to optimize its light conversion efficiency locally while maintaining overall color uniformity across the display panel.
3Productivity
If wavelength conversion particles are exposed to light source, then wavelength conversion efficiency is improved, but chemical resistance deteriorates due to moisture and oxygen exposure
Solution Approach 1:
The patent applies preliminary anti-action by pre-sealing the wavelength conversion particles within the receptacle structure before they are exposed to environmental moisture and oxygen. The receptacle with its protrusion and sealing part creates a protective barrier in advance, preventing chemical degradation while allowing the particles to maintain high wavelength conversion efficiency through optimized optical coupling with the light source.
4Reliability
If sealing part is added to protect wavelength conversion particles, then chemical resistance is improved, but device complexity increases
Solution Approach 1:
The patent applies merging by integrating the sealing function directly into the receptacle structure itself. The protrusion formed on the inner surface of the receptacle serves dual purposes: it creates the sealing interface with the sealing part to protect particles from moisture and oxygen, while also serving as part of the optical cavity structure that holds and positions the wavelength conversion particles.
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 effectively reduces light loss and enhances color uniformity, leading to improved image quality and reliability of the display device by securely sealing wavelength conversion particles and optimizing their arrangement within the receptacle, thus protecting them from external factors and improving chemical resistance.
Implementation Method 1
a plurality of wavelength conversion particles to convert a wavelength of a light emitted from the light source
Data Source
AI summary
Disclosed are an optical member and a display device. The display device includes a light source, a plurality of wavelength conversion particles to convert a wavelength of a light emitted from the light source, a receptacle receiving the wavelength conversion particles and having a protrusion on an inner surface thereof, a sealing part inserted into the receptacle to seal an inner part of the receptacle, and a display panel to display an image by receiving a light converted by the wavelength conversion particles.