QD Glass Cell Encapsulation for LED Light Sources
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Solution Overview
Problem
Conventional quantum dot (QD) fluorescent powder used in LED light sources is prone to oxidation and temperature quenching, leading to reduced light emitting efficiency and uniformity, as well as a short lifespan.
Innovation Solution
A QD glass cell is developed, which encapsulates QD fluorescent powder within a glass cell with a receiving chamber, using a gel material mixed with the powder to prevent oxidation and humidity, and applying a curing process to seal the cell.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If QD fluorescent powder is directly applied to LED light source, then the structure is simple and easy to manufacture, but the QD fluorescent powder is prone to oxidation and temperature quenching, leading to reduced light emitting efficiency and short lifespan
Solution Approach 1:
The patent applies this principle by encapsulating the QD fluorescent powder within a glass cell that creates an inert protective environment. The glass cell structure isolates the QD fluorescent powder from oxygen and moisture, preventing oxidation while maintaining a relatively stable internal atmosphere that reduces temperature quenching effects, thereby extending the life cycle and maintaining light emitting efficiency.
Solution Approach 2:
The patent applies this principle by introducing a glass cell as an intermediary structure between the LED light source and the QD fluorescent powder. This glass cell acts as a mediator that protects the QD fluorescent powder from direct exposure to harmful environmental factors while still allowing light transmission, thus resolving the contradiction between protection and optical performance.
2Use of energy by moving object
If QD fluorescent powder is mixed with silica gel and coated on LED chip, then the application process is simple, but quenching effects with respect to temperature is serious and light emitting efficiency drops
Solution Approach 1:
The glass cell encapsulation creates a controlled inert environment that mitigates temperature quenching effects by isolating the QD fluorescent powder from external thermal fluctuations and oxidative conditions that exacerbate quenching at elevated temperatures.
Solution Approach 2:
The patent applies this principle by changing the physical and chemical environment parameters within the glass cell, such as controlling the internal atmosphere composition and thermal properties, to optimize the operating conditions for the QD fluorescent powder and minimize temperature-dependent quenching effects.
3Reliability
If QD fluorescent powder is used without protection, then the manufacturing process is simple and fast, but oxidation occurs and light color uniformity deteriorates
Solution Approach 1:
The glass cell provides an inert protective environment that prevents oxidation of the QD fluorescent powder, thereby maintaining light color uniformity. The encapsulation structure is designed to be compatible with existing manufacturing processes, balancing protection requirements with manufacturing ease.
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 QD glass cell extends the life cycle of the QD fluorescent powder, enhances light emitting efficiency, and improves light color uniformity compared to conventional technologies.
Implementation Method 1
the QD fluorescent powder and gel material are mixed uniformly to prepare QD fluorescent powder material... the gel material... to prevent oxidation and humidity
Implementation Method 2
a curing process is applied to the QD fluorescent powder material in the receiving chamber... sealing the injection port by hot melting
Implementation Method 3
the QD is of the semiconductor nano-structure binding the conduction band electrons, the holes in the valence band, and exciton in three dimensions... which may emit fluorescent lights after being activated
Data Source
AI summary
A QD glass cell includes a glass cell and QD fluorescent powder material. The glass cell includes a receiving chamber, and the QD fluorescent powder being encapsulated within the receiving chamber. A manufacturing method of the QD glass cell includes: S101: manufacturing a glass cell comprising a receiving chamber, and the glass cell comprising an injection port transmitting fluid into the receiving chamber; S102: manufacturing fluid QD fluorescent powder material; S103: filling the fluid QD fluorescent powder material into the receiving chamber via the injection port; S104: applying a curing process to the fluid QD fluorescent powder material within the receiving chamber; and S105: sealing the injection port by hot melting to obtain the QD glass cell. In addition, the above QD glass cell may be applied to LED light source.