Phosphor Substrate Partition Light Scattering for Display Efficiency
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Phosphor substrates with black matrices absorb fluorescence emitted from phosphor layers, preventing sufficient light output due to absorption or confinement, which limits the efficiency of display devices.
Innovation Solution
A phosphor substrate with a partition surrounding the phosphor layers, where at least the portion in contact with the phosphor layers has light-scattering properties, composed of a material containing resin and light-scattering particles, or is white, or has an uneven shape, to scatter and enhance fluorescence output.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a black matrix is disposed on the phosphor substrate to define pixel regions, then the structural definition and pixel separation are improved, but the fluorescence emitted from phosphor layers is absorbed by the black matrix, reducing light output efficiency
Solution Approach 1:
The invention extracts the light-absorbing function from the partition structure by removing the black matrix material and replacing it with a light-scattering material. This separates the pixel definition function (still performed by the partition) from the light absorption function, allowing the partition to only define pixels while the light-scattering material preserves fluorescence output.
Solution Approach 2:
The invention changes the optical property of the partition from light-absorbing (black) to light-scattering (white or translucent with scattering particles). This color/optical property change allows the partition to maintain its structural definition function while no longer absorbing the fluorescence light, thereby resolving the contradiction between pixel definition and light output efficiency.
2Manufacturing precision
If a partition is disposed around phosphor layers to separate pixels, then the pixel separation and display definition are improved, but the partition absorbs and confines light emitted from phosphors, reducing overall light output
Solution Approach 1:
The invention extracts the light-absorbing property from the partition and replaces it with light-scattering property. The partition maintains its pixel-separation function while the light-scattering material (white paste or particles) ensures that fluorescence light is scattered rather than absorbed, thereby maintaining both display definition and light output.
Solution Approach 2:
The invention uses composite materials for the partition, specifically combining a translucent resin matrix with light-scattering particles (such as silica beads or titania particles). This composite structure provides both the mechanical/structural integrity needed for pixel separation and the optical property of light scattering to preserve fluorescence output.
3Shape
If conventional phosphor color conversion display uses a black matrix for pixel definition, then the structural boundaries are clear, but the light emitted from phosphors is absorbed or confined in the matrix, so light-output efficiency is not increased
Solution Approach 1:
The invention changes the optical appearance of the partition from black (light-absorbing) to white or translucent with light-scattering particles. This visual and optical change allows the partition to maintain clear pixel boundaries while preventing the absorption of fluorescence light, thereby improving light-output efficiency without sacrificing pixel boundary definition.
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 allows for improved light output by reducing absorption and enhancing the scattering of fluorescence, thereby increasing the light-output efficiency of the display device.
Implementation Method 1
a phosphor layer disposed on the substrate, the phosphor layer emitting fluorescence using incident excitation light
Implementation Method 2
a partition surrounding side faces of the phosphor layer, in which at least a portion of the partition in contact with the phosphor layer has light-scattering properties
Data Source
AI summary
A phosphor substrate (10) includes a substrate (1), phosphor layers (3R, 3G, and 3B) which are disposed on the substrate (1) and which emit fluorescences (L2) using incident excitation light (L1), and a partition (7) surrounding side faces of the phosphor layers (3R, 3G, and 3B), in which at least portions of the partition (7) in contact with the phosphor layers (3R, 3G, and 3B) have light-scattering properties.