Wavelength Converting Device Composite Binder Reliability
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Optical projectors face challenges in enhancing the brightness and durability of fluorescence and reflective materials, particularly in withstanding high-power irradiation and large temperature differences.
Innovation Solution
A wavelength converting device is developed with a diffused-reflecting layer comprising a hydrophilic binder and lipophilic binders, each distributed uniformly, along with reflecting particles, to enhance optical and heat resistance, allowing better optical conversion efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a single-type binder is used in the diffused-reflecting layer, then the manufacturing process is simple, but the ability to withstand high-power irradiation and large temperature differences is insufficient
Solution Approach 1:
The patent applies composite materials by combining hydrophilic binder and lipophilic binder in the diffused-reflecting layer. The hydrophilic binder (e.g., silicone resin with hydroxyl group) provides resistance to high-power irradiation, while the lipophilic binder (e.g., oil-based resin) provides resistance to large temperature differences. This composite binder system resolves the contradiction by achieving enhanced reliability through material composition rather than simple single-material use.
2Reliability
If conventional fluorescent and reflective materials are used, then the device structure is simple, but the optical conversion efficiency deteriorates under high-power irradiation
Solution Approach 1:
The patent uses composite materials in the diffused-reflecting layer that include both hydrophilic and lipophilic binders along with reflective particles. This composite structure maintains optical conversion efficiency under high-power irradiation by combining materials with complementary properties: the hydrophilic binder resists degradation from light exposure while the lipophilic binder manages thermal stress, thereby resolving the contradiction between reliability and material complexity.
3Reliability
If the fluorescent material is coated on a rotating wheel, then the device structure is simple, but the material durability deteriorates under high-power irradiation
Solution Approach 1:
The patent enhances material durability by using composite binder materials in the coating layer. The combination of hydrophilic and lipophilic binders creates a more robust coating structure that can withstand high-power irradiation and thermal cycling better than conventional single-binder coatings, thus resolving the contradiction between durability and structural complexity.
Solution Approach 2:
The patent changes the chemical and physical parameters of the binder materials by selecting specific hydrophilic and lipophilic components with appropriate molecular structures and properties. This parameter optimization enables the coating to maintain durability under high-power irradiation while managing the complexity through controlled material selection rather than structural complexity.
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 device effectively withstands high-power irradiation and large temperature differences, maintaining optical conversion efficiency and preventing breakdown during heating or cooling, as demonstrated by comparative testing.
Implementation Method 1
since the wavelength converting device includes the hydrophilic binder and the lipophilic binder each distributed uniformly in the diffused-reflecting layer, abilities of the diffused-reflecting layer to withstand a high power irradiation and a large temperature difference can be enhanced
Implementation Method 2
a laser light source provides first light incident on a fluorescence material to emit second light
Data Source
AI summary
A wavelength converting device includes a diffused-reflecting layer, a substrate, and a photoluminescence layer. The diffused-reflecting layer has a first surface and a second surface facing away from the first surface, and the diffused-reflecting layer includes a hydrophilic binder and a lipophilic binder. The substrate is on the first surface of the diffused-reflecting layer. The photoluminescence layer is on the second surface of the diffused-reflecting layer.