Roughened Wavelength Conversion Member for Phosphor Layer Cooling

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Solution Overview

Problem

Optical projectors face increasing heat dissipation challenges due to rising brightness requirements, particularly for fluorescent materials and wheels in light source configurations.

Innovation Solution

A wavelength conversion member comprising a substrate with a phosphor layer and a non-ventilated blade, where the blade has a roughness between 5 μm and 1.25 mm or a specific surface area exceeding its geometric area by more than 10%, generating micro-vortices to enhance air turbulence and heat dissipation, is used in conjunction with a light source module that rotates the substrate to produce turbulence and accelerate airflow.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Illumination intensity

If the brightness requirements for optical projectors are increased, then the luminous efficiency is improved, but the heat dissipation requirements become increasingly stringent

Engineering Contradiction:

ImprovebrightnessVSAvoidheat dissipation requirements

Core Design Contradiction:

Illumination intensityVSTemperature

Solution Approach 1:

The patent applies fluid dynamics principles by introducing ventilated blades with through-holes that generate vortex effects when air flows through them during rotation. This pneumatic approach creates turbulent airflow patterns that significantly enhance heat dissipation from the phosphor layer, allowing higher brightness operation without excessive temperature increase.

Inventive Principle:

Principle #29Pneumatics and hydraulics

Solution Approach 2:

The ventilated blade functions as a porous structure with through-holes that allow air penetration. As air flows through these holes during rotation, it generates micro-vortex effects that accelerate heat removal from the phosphor layer, effectively managing thermal loads at high brightness levels.

Inventive Principle:

Principle #31Porous materials

2Temperature

If a ventilated blade with through holes is used to generate vortex effect, then the heat dissipation is improved, but the blade size and weight must be reduced

Engineering Contradiction:

Improveheat dissipationVSAvoidblade weight

Core Design Contradiction:

TemperatureVSWeight of moving object

Solution Approach 1:

The ventilated blade uses a porous structure with through-holes that enables vortex generation without requiring large blade dimensions. The holes allow air to pass through and create turbulent flow patterns, achieving effective heat dissipation while maintaining a compact, lightweight blade design.

Inventive Principle:

Principle #31Porous materials

Solution Approach 2:

The patent changes the structural parameters of the blade by introducing through-holes and optimizing their size, distribution, and shape. This parameter modification enables the blade to generate sufficient vortex effects for heat dissipation while keeping the overall blade size and weight reduced.

Inventive Principle:

Principle #35Parameter changes

3Temperature

If the roughness of the non-ventilated blade is increased to generate micro-vortex effect, then the heat dissipation is improved, but the manufacturing precision requirements are increased

Engineering Contradiction:

Improveheat dissipationVSAvoidblade roughness control

Core Design Contradiction:

TemperatureVSManufacturing precision

Solution Approach 1:

The patent modifies the surface parameter of the non-ventilated blade by controlling its roughness within a specific range (5 μm to 1.25 mm). This parameter change enables the generation of micro-vortex effects that enhance heat dissipation while maintaining manufacturability through conventional roughness control methods.

Inventive Principle:

Principle #35Parameter changes

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

This configuration effectively reduces the temperature of the phosphor layer, maintains luminous efficiency as light source power increases, and allows for higher operating power without heat decay, thereby addressing heat dissipation needs in optical projectors.

Implementation Method 1

the non-ventilated blade has a roughness between 5 μm and 1.25 mm, or a specific surface area of the non-ventilated blade exceeds a geometric area of the non-ventilated blade by more than 10%... generates turbulence, and the non-ventilated blade simultaneously produces a micro-vortex effect

Methodology Applied

Scientific EffectTurbulence: Turbulence

Implementation Method 2

the overall geometry generates turbulence, and the non-ventilated blade simultaneously produces a micro-vortex effect

Methodology Applied

Scientific EffectVortex: Vortex Ring

Implementation Method 3

the phosphor layer is disposed on the substrate... configured to receive the light

Methodology Applied

Scientific EffectLight absorption and thermal conversion: Absorption (EM radiation)

Data Source

PatentUS20240072219A1Wavelength conversion member and light source module

Publication Date: 2024.02.29 DELTA ELECTRONICS INC(CN)

AI summary

A wavelength conversion member includes a substrate, a phosphor layer, and a non-ventilated blade. The substrate is configured to rotate based on an axis. The phosphor layer is disposed on the substrate. The non-ventilated blade has a roughness between 5 μm and 1.25 mm, or a specific surface area of the non-ventilated blade exceeds a geometric area of the non-ventilated blade by more than 10%.