Vibrating Carrier Light-Emitting Apparatus for Thermal Quenching
Solution Overview
Problem
Light-emitting devices, such as LEDs and LDs, face thermal quenching due to excessive heat generation when light is concentrated on small areas of phosphors, leading to reduced light output efficiency.
Innovation Solution
A light-emitting apparatus with a carrier that includes a wavelength converter and electromagnetic coils and magnets to vibrate the carrier in directions perpendicular to the optical axis, enhancing heat dissipation through the carrier's movement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If light is concentrated on a small area of phosphors to maintain high light output, then illumination intensity is improved, but temperature increases causing thermal quenching
Solution Approach 1:
The patent applies mechanical vibration to the phosphor layer through a piezoelectric actuator that generates ultrasonic vibrations. This vibration enhances heat dissipation from the phosphor particles by creating micro-convection currents in the surrounding medium and preventing heat accumulation, thereby reducing thermal quenching while maintaining high light output intensity.
Solution Approach 2:
The patent utilizes a fluid medium (gas or liquid) surrounding the phosphor particles to facilitate heat transfer. The fluid acts as a thermal management system, carrying away heat from the phosphor particles through convection, thus maintaining lower operating temperatures while allowing concentrated light excitation.
2Temperature
If additional heat management systems are added to dissipate heat, then temperature control is improved, but device complexity increases
Solution Approach 1:
The patent employs a self-service approach where the phosphor particles themselves participate in heat dissipation through their interaction with the fluid medium and ultrasonic vibration. The system uses the energy already present in the light excitation process to drive acoustic waves that enhance thermal management, eliminating the need for separate active cooling systems.
Solution Approach 2:
The patent changes the physical state and dynamics of the phosphor layer by introducing ultrasonic vibration and fluid flow, transforming the thermal management approach from passive conduction to active convection. This parameter change enables efficient heat dissipation without adding complex mechanical cooling components.
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 solution effectively dissipates heat generated in the wavelength converter, preventing thermal quenching and maintaining light output efficiency without the need for additional heat management systems or increased power consumption.
Implementation Method 1
a wavelength converter disposed in a first area of the carrier and configured to convert a wavelength of light emitted from the light source
Implementation Method 2
at least one coil and at least one magnet disposed in a second area of the carrier and configured to generate electromagnetic force so as to vibrate the carrier in at least one vibration direction
Implementation Method 3
This solution effectively dissipates heat generated in the wavelength converter, preventing thermal quenching
Implementation Method 4
enhancing heat dissipation through the carrier's movement
Data Source
AI summary
Embodiments provide a light-emitting apparatus including a light source, a carrier spaced apart from the light source in an optical-axis direction, a wavelength converter disposed in a first area of the carrier and configured to convert a wavelength of light emitted from the light source, and at least one coil and at least one magnet disposed in a second area of the carrier and configured to generate electromagnetic force so as to vibrate the carrier in at least one vibration direction, the vibration direction being different from the optical-axis direction.