Dual-Flow Cooling Illumination Apparatus for Dust-Free High Luminance
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Increasing the number of solid state light sources in projection image display apparatuses leads to enhanced luminance but poses challenges in cooling due to increased heat generation, and existing solutions require larger heat sinks to improve cooling performance, which is inconvenient and may allow dust to adhere to optical components.
Innovation Solution
An illumination apparatus with a solid state light source unit, optical elements, a heat conduction member, and a cooling unit that uses separate fluid flow paths to conduct heat and prevent dust adhesion, employing a heat sink and fans to supply cooling air, while maintaining a compact size by using clean air and sealing the light emitting side to prevent dust ingress.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the number of solid state light sources is increased to improve luminance, then the luminance of the projected image is improved, but the amount of heat generated increases making it difficult to cool the solid state light sources
Solution Approach 1:
The cooling function is segmented into two independent systems: a first cooling unit (heat sink) for cooling the light emitting side, and a second cooling unit for cooling the opposite side. This segmentation allows each cooling unit to be optimized independently, enabling effective cooling of multiple solid state light sources without requiring a single oversized cooling system.
2Temperature
If a heat sink is arranged on the opposite side of the light emitting side to improve cooling effect, then the cooling performance is improved, but the size of the heat sink increases
Solution Approach 1:
The heat sink is divided into two separate cooling units positioned at different locations (light emitting side and opposite side). This segmentation allows the total cooling capacity to be distributed across two smaller units rather than requiring one large unit, reducing the overall space requirement while maintaining effective cooling performance.
Solution Approach 2:
The cooling approach transitions from a single-location cooling system to a dual-location cooling system, utilizing three-dimensional space more efficiently by distributing cooling functions across different spatial positions within the housing.
3Object-affected harmful factors
If a sealed space is formed on the light emitting side to prevent dust adhesion, then dust prevention is improved, but the size of the cooling unit must be further increased to improve cooling performance
Solution Approach 1:
The sealing function is segmented and applied specifically to the light emitting side where dust prevention is most critical, rather than requiring a complete sealed enclosure. This localized sealing approach prevents dust adhesion to optical components without necessitating a large sealed volume, allowing the cooling units to remain compact.
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
Effectively cools solid state light sources without increasing the size of the cooling unit, improves cooling performance, and prevents dust from adhering to optical components, allowing for a more compact and efficient illumination system.
Implementation Method 1
a heat conduction member arranged in a space different from a space between the light emitting face of the solid state light source unit and the plurality of optical elements, configured to conduct heat from the solid state light source unit
Implementation Method 2
a cooling unit configured to supply a first fluid to the heat conduction member along a first flow path
Implementation Method 3
a cooling unit configured to supply a first fluid to the heat conduction member along a first flow path
Implementation Method 4
supply a second fluid to the space between the light emitting face and the optical elements along a second flow path, wherein the second fluid is a fluid from which dust or dust and moisture is reduced
Data Source
AI summary
An illumination apparatus includes a solid state light source unit including a plurality of light emitting points that emits light and is arranged on a light emitting face, a plurality of optical elements configured to guide light emitted from the plurality of light emitting points to an illumination target face, a heat conduction member arranged in a space different from a space between the light emitting face of the solid state light source unit and the plurality of optical elements, configured to conduct heat from the solid state light source unit, and a cooling unit configured to supply a first fluid to the heat conduction member along a first flow path and supply a second fluid to the space between the light emitting face and the optical elements along a second flow path, wherein the second fluid is a fluid from which dust or dust and moisture is reduced.