Projector Light Source Hermetic Cooling and Dust Prevention
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Solution Overview
Problem
The existing light source apparatuses for projectors face issues with dust adhesion to phosphors and optical systems, leading to decreased light efficiency due to temperature increases and structural design limitations, which result in reduced image brightness and efficiency.
Innovation Solution
A light source apparatus with a solid-state light source, phosphor, and optical system housed in separate hermetic spaces, utilizing an air blowing mechanism and a holding member to maintain a hermetic seal and cool the phosphor, while allowing for the adjustment of the phosphor's position relative to the pickup lens to enhance light collection and prevent dust adhesion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the phosphor is disposed in a hermetic space to prevent dust adhesion, then dust adhesion is suppressed, but the temperature of the phosphor increases causing decreased fluorescence conversion efficiency
Solution Approach 1:
The patent divides the hermetic space into two separate accommodation spaces: a first accommodation space for the phosphor and a second accommodation space for the optical system. These spaces are separated by a holding member that holds the pickup lens. This segmentation allows independent thermal management of the phosphor while maintaining hermetic sealing to prevent dust adhesion.
2Use of energy by moving object
If the pickup lens is positioned close to the phosphor to improve light collection, then fluorescence pickup efficiency is improved, but the structural complexity of the hermetic space increases
Solution Approach 1:
The holding member that separates the first and second accommodation spaces also serves as the support structure for the pickup lens. This multi-functional design allows the pickup lens to be positioned close to the phosphor for efficient fluorescence collection while avoiding additional structural complexity in the hermetic space.
3Reliability
If the motor is hermetically accommodated in the casing to prevent dust adhesion, then dust adhesion is suppressed, but it becomes difficult to hold the motor in a stable rotational state
Solution Approach 1:
The patent extracts the motor from the first hermetic accommodation space and places it in the second accommodation space for the optical system. This extraction allows the motor to rotate stably without dust adhesion concerns, while the phosphor remains protected in the sealed first accommodation space.
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 suppresses dust adhesion and maintains high light efficiency by ensuring a hermetic seal and efficient cooling, resulting in brighter image projection.
Implementation Method 1
an air blowing mechanism that blows air into the first accommodation space
Implementation Method 2
a phosphor on which light emitted from the solid-state light source is incident
Data Source
AI summary
The disclosure relates to a light source apparatus including a solid-state light source, a phosphor on which light emitted from the solid-state light source is incident, an optical system that guides the light emitted from the solid-state light source at least to the phosphor, an enclosure member having a first accommodation space that accommodates the phosphor and a second accommodation space that accommodates the optical system, and an air blowing mechanism that blows air into the first accommodation space, wherein the optical system includes a pickup lens on which fluorescence emitted from the phosphor is incident, and the first accommodation space and the second accommodation space are separated from each other by a holding member that holds the pickup lens.