Quantum Dot Light Converter Sealed Unit for Display Color Reproducibility
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Display apparatuses using quantum dots for improved color reproducibility face challenges due to the vulnerability of quantum dots to moisture and oxidation, especially when exposed as a sheet over a large area, requiring protective coating and potential damage from intense light.
Innovation Solution
A light source package design that includes a light converter with quantum dots sealed within a hermetically closed unit body and a reflector system to direct light away from the quantum dots, preventing exposure and damage, while ensuring uniform light emission and color reproduction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If quantum dots are formed as a sheet to improve color reproducibility, then color quality is improved, but the quantum dots become vulnerable to moisture and oxidation
Solution Approach 1:
The quantum dot sheet is divided into multiple quantum dot layers, each containing quantum dots of a specific size range that emit specific colors. This segmentation allows for better protection of each layer while maintaining overall color quality.
Solution Approach 2:
Multiple quantum dot layers are stacked in sequence, with each layer nested within the overall structure. The layers are arranged from shortest to longest wavelength emission, creating a protected nested structure that shields quantum dots from environmental damage.
2Area of stationary object
If quantum dots are exposed as a sheet over a large area, then color coverage is improved, but protective coating is required adding complexity
Solution Approach 1:
Multiple quantum dot layers are stacked to form a nested structure that inherently protects the quantum dots. This eliminates the need for separate protective coating layers while maintaining large area coverage for color reproduction.
Solution Approach 2:
Each quantum dot layer is formed as a composite structure with specific materials designed to protect the quantum dots while allowing light transmission. The layered composite structure provides both protection and optical functionality.
3Illumination intensity
If intense light is used to illuminate the quantum dots, then brightness is improved, but the quantum dots may be damaged
Solution Approach 1:
The stacked layered structure of quantum dots provides mutual protection against intense light exposure. Each layer shields the others, distributing the light energy load and preventing damage to individual quantum dot layers while maintaining high overall brightness.
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
Enhances color reproducibility and protects quantum dots from moisture and light-induced damage, maintaining their effectiveness and longevity within the display apparatus.
Implementation Method 1
a light converter including quantum dots and a unit body forming an arrangement space for the quantum dots
Implementation Method 2
a first reflector disposed around the light source to reflect light from the light source to the light converter; a second reflector disposed adjacent to the light converter, and configured to reflect light generated by the light source or reflected by the light converter
Data Source
Figure 1
Figure 2
Figure 3
AI summary
A display apparatus includes: a display panel; a light source package configured to supply light; and a light guide plate configured to receive the light supplied by the light source package and guide the light to the display panel. The light source package includes: a light source configured to generate the light; a first reflector disposed around the light source; a light converter disposed between the light source and the light guide plate, the light converter being configured to convert properties of the light directed toward the light guide plate; and a second reflector protruding from the light converter toward the light source, the second reflector being configured to reflect the light generated by the light source toward the first reflector, and to reflect light reflected by the light converter toward the light guide plate.