Wavelength Conversion Device with Integrated Air Cooling Channels
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Solution Overview
Problem
Existing light source devices face challenges in achieving high luminance and long-term reliability due to inadequate heat radiation of the phosphor layer, leading to temperature quenching and decreased light emission efficiency.
Innovation Solution
A wavelength conversion device with a base material and a light transmitting member that allows air circulation to efficiently cool the phosphor layer, preventing dust adhesion and temperature rises, thereby maintaining high luminance and reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If light intensity of the excitation light is increased to emit light having higher luminance, then luminance is improved, but temperature of the phosphor layer rises causing temperature quenching and deteriorated light emission efficiency
Solution Approach 1:
The patent introduces air as an intermediary cooling medium that flows through channels formed in the base material beneath the phosphor layer. This air flow acts as a heat transfer mediator, carrying away excess heat from the phosphor layer to prevent temperature quenching while allowing the excitation light to maintain high intensity for high luminance output.
Solution Approach 2:
The patent employs pneumatic cooling by circulating air through channels in the base material. The air flow serves as a fluid cooling system that efficiently removes heat from the phosphor layer, enabling the system to sustain high excitation light intensity without excessive temperature rise that would cause temperature quenching.
2Reliability
If heat radiation property is improved to prevent temperature rise, then temperature quenching is prevented, but device complexity increases due to additional cooling structures
Solution Approach 1:
The patent merges the cooling function with the base material structure by forming channels directly within the base material itself. This integration combines the structural support function of the base material with the heat dissipation function, eliminating the need for separate cooling components and reducing overall device complexity while maintaining effective heat radiation.
Solution Approach 2:
The base material is designed to serve multiple functions: providing structural support for the phosphor layer and simultaneously acting as a heat dissipation structure through integrated channels. This multi-functionality reduces the need for additional dedicated cooling components, thereby preventing temperature quenching without significantly increasing device complexity.
3Object-affected harmful factors
If phosphor layer is sealed to protect from dust, then dust adhesion is prevented, but heat radiation efficiency is reduced
Solution Approach 1:
The patent segments the sealing function from the heat radiation function by providing dedicated channels within the base material that allow air flow for cooling while the phosphor layer remains sealed against dust. The channels are positioned and configured to enable thermal management without compromising the protective sealing of the phosphor layer.
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 effectively prevents temperature quenching and maintains high luminance by efficiently cooling the phosphor layer and preventing dust adhesion, ensuring reliable light emission.
Implementation Method 1
a wavelength conversion layer that is excited by excitation light to thereby emit light in a wavelength band different from a wavelength band of the excitation light
Implementation Method 2
by circulating air in the channel of the base material, it is possible to cause the air to flow out from the opening section and change a flow of the air with the light transmitting member to cause the air to flow to the wavelength conversion layer
Data Source
AI summary
A wavelength conversion device includes a phosphor layer that is excited by excitation light to thereby emit light in a wavelength band different from a wavelength band of the excitation light, a base material that includes a first surface and holds the phosphor layer on the first surface, and a third lens disposed to be opposed to the phosphor layer. An opening section juxtaposed with the phosphor layer is provided on the first surface. A channel that causes the opening section and the outside of the wavelength conversion device to communicate is provided in the base material. The third lens includes an opposed surface opposed to the phosphor layer and the opening section.