Light Source Device Air Flow Guide for Projector Cooling
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Solution Overview
Problem
In dual-lamp projectors, the existing technology for replacing light source devices from the lateral side results in uneven air induction, leading to reduced lifespan of light emitting tubes when both devices have the same structure, as the air induction port is not optimally positioned for both tubes, especially when one tube's port is on the upper side and the other's is on the lower side.
Innovation Solution
A light source device with a tubular member featuring vertically symmetrical air circulating units and a rotatable air flow guide member that pivots under its own weight to ensure efficient air introduction to the upper portion of the light emitting tube, regardless of the device's orientation, maintaining optimal airflow even when the projector is installed in various postures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If two light source devices are made to have the same structure for cost and usability, then manufacturing cost and ease of replacement are improved, but air induction becomes uneven when devices are disposed with vertically opposite postures, reducing light emitting tube lifespan
Solution Approach 1:
The air induction port is positioned asymmetrically within the light source device housing, specifically located toward one end of the housing rather than centrally. This asymmetric positioning ensures that when two identical light source devices are installed in vertically opposite orientations, only one device will have its air port in the upper position for optimal cooling, while the other will have it in the lower position. The asymmetry resolves the contradiction by accepting that not all devices will have optimal air induction, but the standardized symmetric device structure maintains manufacturing efficiency.
2Reliability
If air induction port is provided to cool the upper portion of the light emitting tube, then tube lifespan is extended, but the air induction port cannot be optimally positioned for both tubes when devices have the same structure and are disposed with opposite postures
Solution Approach 1:
The air induction port is positioned asymmetrically within the light source device housing, specifically located toward one end of the housing rather than centrally. This asymmetric positioning ensures that when two identical light source devices are installed in vertically opposite orientations, only one device will have its air port in the upper position for optimal cooling, while the other will have it in the lower position. The asymmetry resolves the contradiction by accepting that not all devices will have optimal air induction, but the standardized symmetric device structure maintains manufacturing efficiency.
3Ease of operation
If light source devices are replaced from the lateral side, then ease of operation is improved, but the air induction port positioning becomes problematic when both devices have the same structure
Solution Approach 1:
The light source device is designed with a universal structure that can be installed in multiple orientations (vertically opposite postures) while maintaining the same housing configuration and air port positioning. This universal design allows identical devices to be replaced from the lateral side without requiring orientation-specific modifications, achieving ease of operation. The compromise in air induction performance for one of the devices is accepted as a trade-off for maintaining standardized universal device structure.
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 ensures longer tube lifespan by ensuring efficient air feeding to the upper portion of both light emitting tubes, regardless of the projector's orientation, thereby extending the life of the light emitting tubes and maintaining performance across different installation postures.
Implementation Method 1
the air flow guide member is pivoted rotatably around a predetermined rotational axis with respect to the air circulating unit under own weight of the air flow guide member
Implementation Method 2
a discharge emission light source device causing discharge emission between a pair of electrodes
Implementation Method 3
a reflecting mirror adapted to reflect a luminous flux emitted from the light emitting section
Data Source
AI summary
A light source device includes: a light emitting tube; a reflecting mirror; and a tubular member disposed on a forward side of light emission of the reflecting mirror, and surrounding the light emitting tube, the tubular member has a pair of air circulating units communicating inside and outside of the tubular member and adapted to allow introduction of external air from the forward side toward a backward side of the light emission in a vertically symmetrical manner on a center axis of the light emitting tube, inside the air circulating unit there is disposed a air flow guide member, and the air flow guide member is pivoted rotatably around a predetermined rotational axis with respect to the air circulating unit under own weight of the air flow guide member, and rotates to thereby open and block at least a part of a flow passage inside the air circulating unit.