Optical Member Light Conversion Layer Moisture Barrier
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Solution Overview
Problem
Current display devices face challenges in achieving improved durability and display quality, particularly in terms of light management and optical efficiency, which affects their overall performance and longevity.
Innovation Solution
The implementation of a display device configuration that includes a light source, a display panel, a light guide, and an optical member with a low refractive index layer, a light conversion layer, and specific barrier layers to enhance light management and conversion, featuring a layered structure with distinct refractive indices and densities to optimize light transmission and durability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a single barrier layer is used in the optical member, then the device complexity is reduced, but the moisture barrier effectiveness and durability are insufficient
Solution Approach 1:
The barrier layer is divided into multiple sub-layers (first barrier layer and second barrier layer) with different materials and densities. This segmentation allows each sub-layer to contribute differently to moisture barrier performance, achieving superior overall protection compared to a single homogeneous layer.
Solution Approach 2:
The optical member uses composite material structure with at least two different inorganic materials in the barrier layers. This composite approach combines the advantages of different materials to achieve both excellent moisture barrier properties and optical performance.
2Illumination intensity
If the refractive index of the low refractive index layer is increased, then the light transmission efficiency is improved, but the luminance uniformity deteriorates
Solution Approach 1:
The refractive index of the low refractive index layer is precisely controlled within a specific range (1.1 to 1.3) to achieve the optimal balance between light transmission efficiency and luminance uniformity. This parameter optimization ensures both high light extraction and uniform display quality.
3Reliability
If the thickness of the barrier layers is increased, then the moisture barrier performance is improved, but the manufacturing precision requirements increase
Solution Approach 1:
Different barrier layers are designed with different thicknesses and material compositions tailored to their specific functions. The first barrier layer and second barrier layer have optimized local properties that collectively achieve superior moisture barrier performance without requiring excessive total thickness.
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 improves the durability and display quality by effectively managing light transmission, reducing luminance changes over time, and providing a moisture barrier, thus enhancing the overall performance and longevity of the display device.
Implementation Method 1
a light conversion layer on the first cover layer, the light conversion layer being configured to convert a wavelength band of an incident light
Implementation Method 2
a low refractive index layer on a light exit surface of the light guide; a refractive index of the low refractive index layer may be greater than or substantially equal to about 1.1 and less than or substantially equal to about 1.3
Data Source
AI summary
A display device includes: a light source configured to generate a light; a display panel configured to display images using the light; a light guide having at least one surface adjacent the light source; and an optical member between the light guide member and the display panel. The optical member includes: a low refractive index layer on a light exit surface of the light guide member; a first cover layer on the low refractive index layer; and a light conversion layer on the first cover layer and configured to convert a wavelength band of an incident light.