Deep Ultraviolet Light Module Liquid Sealing
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Solution Overview
Problem
Sealing semiconductor light-emitting elements that emit deep ultraviolet light with resins leads to a rapid drop in intensity due to high absorption, resulting in low reliability of the light-emitting module.
Innovation Solution
A light-emitting module with a semiconductor light-emitting element sealed in a transparent liquid and a package that includes a transparent member, allowing for efficient transmission of deep ultraviolet light, reducing absorption and maintaining transmittance over time.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a semiconductor light-emitting element emitting deep ultraviolet light is sealed with a resin having high transmittance to infrared light and blue light, then the light-emitting module can be manufactured with conventional sealing materials, but the intensity of deep ultraviolet light drops rapidly over the emission period due to high absorption by the resin
Solution Approach 1:
The patent changes the physical state of the sealing material from solid (cured resin) to liquid, and selects a liquid with specific optical parameters (high transmittance to deep ultraviolet light) to resolve the contradiction between ease of manufacture and light output stability
Solution Approach 2:
The patent uses a liquid sealing material that maintains its transparency to deep ultraviolet light over time, effectively replacing the need for complex cured resin systems while providing sustained performance
2Stability of the object's composition
If a cured resin is used to seal the semiconductor light-emitting element, then the sealing structure is stable and protective, but the deep ultraviolet light transmittance decreases significantly over time due to material absorption
Solution Approach 1:
The patent changes the sealing material from a cured resin (solid, yellowish, high absorption) to a liquid state material that maintains optical transparency, fundamentally altering the material parameters to achieve both stability and high transmittance
Solution Approach 2:
The liquid acts as an intermediary medium between the semiconductor light-emitting element and the external environment, providing both protective sealing and optical transparency functions that cured resin cannot achieve
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 provides a highly reliable light-emitting module with sustained deep ultraviolet light output and improved extraction efficiency, extending the module's lifespan and maintaining high light output power.
Implementation Method 1
The liquid is transparent to the deep ultraviolet light emitted from the semiconductor light-emitting element
Implementation Method 2
The package has a transparent member transparent to the deep ultraviolet light emitted from the semiconductor light-emitting element
Data Source
AI summary
A light-emitting module includes: a semiconductor light-emitting element which emits deep ultraviolet light; a liquid sealing the semiconductor light-emitting element; and a package for accommodating the semiconductor light-emitting element and the liquid. The liquid is transparent to the deep ultraviolet light. The package has a transparent member transparent to the deep ultraviolet light. For that reason, a highly reliable light-emitting module provided with the semiconductor light-emitting element that emits the deep ultraviolet light can be provided.