Fluorescent Glass Wavelength Conversion Element for Projection Devices
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Solution Overview
Problem
Conventional projection devices have limited luminous efficiency and color coordinate adjustment capabilities due to the reliance on phosphor in fluorescent layers, where glass serves only as a binding agent without light-emitting function.
Innovation Solution
A wavelength conversion element comprising a substrate with a wavelength conversion material that includes fluorescent glass and a second fluorescent material, where the fluorescent glass covers the second fluorescent material, allowing for the conversion of excitation beams into multiple beams with different wavelength peaks, thereby enhancing luminous efficiency and adjusting color coordinates.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If glass is used only as a binding agent in the fluorescent layer, then the structure is simple and easy to manufacture, but the luminous efficiency is limited and the glass does not contribute to light emission
Solution Approach 1:
The glass material is transformed from a single function (binding agent) to multiple functions: it still binds the phosphor particles together while simultaneously serving as a fluorescent material that converts excitation light. This multi-functionality allows the glass to contribute to light emission in addition to its structural role, thereby improving luminous efficiency without complicating the manufacturing process.
Solution Approach 2:
The invention creates a composite fluorescent glass material by combining glass基质 with phosphor particles. This composite structure integrates the binding properties of glass with the fluorescent properties of phosphor, allowing both materials to work synergistically. The glass component itself becomes fluorescent when doped with appropriate materials, creating a system where the binder and the light-emitting material are unified.
2Device complexity
If only phosphor is used for wavelength conversion, then the material composition is simple, but the color coordinate adjustment capability is limited
Solution Approach 1:
The invention applies local quality by creating regions with different phosphor compositions within the fluorescent glass layer. Different areas of the glass can contain different phosphor materials or concentrations, allowing for spatial variation in emission characteristics. This enables precise control over color coordinates across different regions of the projection device, enhancing adaptability while maintaining a relatively simple overall structure.
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 achieves a composite luminous effect, improves luminous efficiency, and adjusts color coordinates by utilizing the wavelength differences of beams generated by exciting two different fluorescent materials, optimizing the color coordinate in the CIE color space compared to conventional systems.
Implementation Method 1
The fluorescent glass is configured to convert the excitation beam into a first beam
Implementation Method 2
the second fluorescent material is configured to convert the excitation beam into a second beam
Data Source
AI summary
A wavelength conversion element includes a substrate and a wavelength conversion material, wherein the wavelength conversion material is disposed on the substrate, and the wavelength conversion material is configured to convert an excitation beam into a conversion beam. The wavelength conversion material includes a fluorescent glass and a second fluorescent material. The fluorescent glass includes a glass material and a first fluorescent material. The fluorescent glass covers the second fluorescent material, and the first fluorescent material and the second fluorescent material are different.