Projector Light Guide Temperature Control for Stable Color Gamut
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Solution Overview
Problem
The temperature rise in the wavelength conversion member of a light source device used in projectors can lead to increased temperature quenching of fluorescence, reducing wavelength conversion efficiency and color gamut, thereby deteriorating image quality.
Innovation Solution
A light source device with a temperature adjustment mechanism that includes a measurement unit to monitor the temperature of the wavelength conversion member, a controller to adjust the temperature based on measured values, and a support member to dissipate heat, thereby maintaining optimal operating temperatures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If the phosphor absorbs excitation light to convert wavelength, then wavelength conversion occurs, but the temperature of the wavelength conversion member rises causing temperature quenching of fluorescence
Solution Approach 1:
The patent extracts the harmful heat from the wavelength conversion member by introducing a heat dissipation member that makes thermal contact with the wavelength conversion member. This heat dissipation member conducts heat away from the phosphor, preventing temperature rise and the associated temperature quenching of fluorescence, thereby maintaining high wavelength conversion efficiency.
Solution Approach 2:
The heat dissipation member acts as an intermediary between the wavelength conversion member and the heat sink. It mediates the heat transfer process by providing a dedicated thermal conduction path that efficiently removes heat from the phosphor without interfering with the optical conversion process, thus resolving the contradiction between maintaining conversion efficiency and managing temperature.
2Temperature
If the temperature of the wavelength conversion member is too high, then heat dissipation is needed, but adding heat dissipation structures increases device complexity
Solution Approach 1:
The patent merges the heat dissipation function with existing structural components. The heat dissipation member is integrated into the housing or mounting structure, combining thermal management with the mechanical support structure. This approach provides effective temperature control without significantly increasing device complexity, as the heat dissipation pathway is incorporated into the existing structural framework.
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 temperature adjustment mechanism effectively maintains the efficiency and color gamut of the fluorescence emitted by the wavelength conversion member, enhancing the quality of projected images.
Implementation Method 1
a light source unit including a light emitting element that emits light
Implementation Method 2
a wavelength conversion member that converts the excitation light into fluorescence
Implementation Method 3
a support member that supports the light guide member, a pressing unit configured to press the light guide member against the support member
Data Source
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AI summary
A light source device according to the present disclosure includes a light source unit including a light emitting element configured to emit light, a light guide member onto which the light emitted from the light emitting element is incident and which is configured to emit light, a support member configured to support the light guide member, a pressing unit configured to press the light guide member against the support member, a measurement unit configured to measure a characteristic value correlated with a temperature of the light guide member, a controller configured to acquire the characteristic value measured by the measurement unit, and a temperature adjustment unit configured to adjust the temperature of the light guide member, wherein the controller controls the temperature adjustment unit based on the characteristic value.