Quantum-Dot Optical Glass Encapsulation for Narrower Display Seams
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Solution Overview
Problem
Large-size spliced screens face challenges in achieving '0 seam' display with high brightness, color saturation, and light uniformity, as physical seams between display units are difficult to minimize, and existing technologies fail to effectively protect quantum dot fluorescent agents from edge failures and moisture intrusion.
Innovation Solution
The development of optical glass with a glass substrate and encapsulated quantum dot fluorescent agents, which are protected by an encapsulation shell, reducing edge failures and allowing for improved luminous efficiency, color gamut, and reduced seam width in spliced screens, along with a manufacturing method involving mixing and photocuring of encapsulation mixtures with quantum dot fluorescent agents and glass substrate powder.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If quantum dot fluorescent agents are used to improve color gamut and luminous efficiency, then color expression range is greatly increased, but edge failures occur due to water vapor intrusion
Solution Approach 1:
The patent applies an encapsulation shell around quantum dot fluorescent agents to protect them from water vapor intrusion. This shell acts as a barrier that prevents harmful environmental factors from reaching the quantum dots, thereby maintaining their luminous efficiency and preventing edge failures while preserving the color gamut improvements.
Solution Approach 2:
The patent uses composite material structure by combining quantum dot fluorescent agents with an encapsulation shell material. This composite approach allows the quantum dots to maintain their optical properties for color gamut enhancement while the encapsulation material provides protection against water vapor, resolving the contradiction between reliability improvement and harmful factor exposure.
2Area of stationary object
If spliced display units are used to achieve large-size screens, then display area is increased, but physical seams between units are visible
Solution Approach 1:
The patent changes the expansion coefficient parameter of the optical glass to match that of the quantum dot fluorescent agents. This parameter matching ensures uniform expansion and contraction behavior across different display units when temperature varies, minimizing physical seams and achieving a more seamless appearance in large-size spliced screens.
3Shape
If expansion coefficient matching is optimized to reduce seam width in spliced screens, then visual splitting effect is weakened, but manufacturing precision requirements increase
Solution Approach 1:
The patent optimizes the expansion coefficient parameter of the optical glass to closely match that of the quantum dot fluorescent agents. By carefully controlling this physical parameter during material selection and formulation, the patent achieves minimal seam width in spliced screens while managing manufacturing precision requirements through systematic material design.
4Illumination intensity
If additional diffuser plates are added to improve light uniformity, then display quality is enhanced, but module thickness increases
Solution Approach 1:
The patent makes the optical glass perform multiple functions: it serves as both a structural component and a light diffusion element. By incorporating light diffusion properties directly into the optical glass, the patent eliminates the need for separate diffuser plates, thereby maintaining light uniformity while reducing overall module thickness.
Solution Approach 2:
The patent merges the functions of optical glass and diffuser plates into a single integrated component. The optical glass is designed to simultaneously provide structural support, optical clarity, and light diffusion capabilities, eliminating the need for additional separate layers and reducing the overall thickness of the display module.
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 optical glass enhances color gamut, prevents edge failures, and reduces seam width in spliced screens, improving display quality and eliminating the need for additional diffuser plates, resulting in a thinner and more efficient display module.
Implementation Method 1
each optical masterbatch comprises a quantum dot fluorescent agent inner core and an encapsulation shell which encloses the quantum dot fluorescent agent inner core
Implementation Method 2
red and green quantum dots are excited by high-energy blue light, narrow half-peak width spectra are emitted, and the purity of primary light is higher
Implementation Method 3
the glass is capable of preventing against the invasion of water vapor, even the quantum dot fluorescent agent at an edge of the glass rarely fails
Implementation Method 4
the expansion coefficient is small, and an expansion space reserved during assembly is extremely small, so that when the optical glass is applied to a spliced screen, a seam width may be greatly reduced
Data Source
AI summary
Optical glass, a preparation method thereof, a backlight module and a display module. The optical glass comprises a glass substrate and optical masterbatches, which are dispersed in the glass substrate, each optical masterbatch comprises a quantum dot fluorescent agent inner core and an encapsulation shell which encloses the quantum dot fluorescent agent inner core. A quantum dot fluorescent agent is protected by the encapsulation shell and the luminous efficiency is high; when the optical glass is applied to a display module, the color gamut may be improved; moreover, the glass is capable of preventing against the invasion of water vapor, even the quantum dot fluorescent agent at an edge of the glass rarely fails, and an edge failure size is basically avoided; meanwhile, the expansion coefficient is small, and an expansion space reserved during assembly is extremely small.