Light Source Apparatus Cooling Air Segmentation
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Solution Overview
Problem
Existing light source apparatuses for ultra high pressure mercury lamps face challenges in maintaining optimal temperature for the light emitting tube, leading to issues such as reduced luminous flux, color balance deterioration, and potential tube breakage due to inadequate cooling, which affects the service life and performance of the lamp.
Innovation Solution
A light source apparatus with a concave-shaped reflector and a transparent glass plate covering the opening, utilizing a cooling fan to direct cooling air specifically to the sealing portion of the discharge electrodes and incorporating an ultraviolet and infrared reflection filter to absorb returning ultraviolet light, ensuring appropriate cooling and reducing ultraviolet light exposure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If the light emitting tube is cooled by blowing air to the entire reflector, then the temperature of the tube is controlled stably, but the sealing portion of the discharge electrodes cannot be cooled sufficiently
Solution Approach 1:
The cooling air flow is segmented into multiple paths: one path cools the outer surface of the reflector, another path cools the sealing portion of the discharge electrodes through the lead wire hole, and a third path cools the transparent glass plate. This segmentation allows each critical area to be cooled independently and effectively.
Solution Approach 2:
Different regions of the light source apparatus are provided with different cooling characteristics. The sealing portion of the discharge electrodes receives directed cooling air through the lead wire hole, while the outer reflector surface receives cooling from the side, and the glass plate receives cooling from the front. This local quality approach ensures each area gets the appropriate cooling it needs.
2Loss of energy
If the light emitting tube is directly cooled by blowing air through the reflector, then cooling efficiency is improved, but temperature control stability deteriorates
Solution Approach 1:
The cooling system is segmented into multiple independent cooling paths that work simultaneously. Cooling air is divided to cool the outer reflector, the sealing portion through the lead wire hole, and the glass plate, allowing efficient heat removal while maintaining stable temperature control through distributed cooling.
Solution Approach 2:
The lead wire hole serves as an intermediary channel that allows cooling air to reach the sealing portion of the discharge electrodes without directly exposing the light emitting tube to uncontrolled cooling. This intermediary path enables efficient cooling while maintaining temperature stability.
3Reliability
If cooling air is blown to the sealing portion through the lead wire hole, then the service life of the lamp is extended, but ultraviolet light returns to the light emitting tube causing excessive heating
Solution Approach 1:
The cooling air path that was potentially harmful by allowing UV light to return to the light emitting tube is converted into a benefit by positioning the ultraviolet and infrared reflection filter to intercept and reflect UV and IR light away from the light emitting tube, while still allowing the cooling air flow to function.
Solution Approach 2:
The ultraviolet and infrared reflection filter acts as an intermediary that blocks harmful UV and IR light from returning to the light emitting tube while allowing the cooling air flow to pass through. This mediator resolves the conflict between cooling efficiency and UV light exposure.
4Object-affected harmful factors
If an ultraviolet and infrared reflection filter is added to block returning UV light, then ultraviolet exposure is reduced, but device complexity increases
Solution Approach 1:
The ultraviolet and infrared reflection filter performs multiple functions: it blocks UV light from returning to the light emitting tube, reflects infrared light, and is positioned to also serve as a structural element in the cooling air path. This multi-functionality reduces the overall device complexity despite adding the filter.
Solution Approach 2:
The ultraviolet and infrared reflection filter is merged with the existing optical path and cooling structure. The filter is positioned to simultaneously handle UV/IR light management and accommodate the cooling air flow, combining multiple functions into a single integrated component.
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 solution effectively maintains the light emitting tube within a stable temperature range, preventing quartz glass crystallization, ensuring desired luminous flux, and enhancing color balance, thereby extending the lamp's service life and improving image display quality.
Implementation Method 1
a cooling fan blowing cooling air toward a side portion of the concave-shaped reflector
Implementation Method 2
an ultraviolet and infrared reflection filter upon which light is incident, the light having been reflected by the concave-shaped reflector and passing through the transparent glass plate
Data Source
AI summary
A light source apparatus according to one embodiment of the present invention is comprised of a light emitting tube having a first electrode in one end and a second electrode in the other end thereof, the tube having both ends closed, a concave-shaped reflector having a hole in its deepest portion, the hole being provided for holding the light emitting tube, a transparent glass plate covering an opening of the reflector, a lead wire whose ends connects to the second electrode and extends out through a hole formed on a side surface of the reflector, respectively, a cooling fan blowing cooling air toward the reflector, and an air guiding member that separates the cooling air from the fan into a first cooling air cooling an outer surface of the reflector and a second cooling air cooling the other end of the lead wire extending out from the reflector.