LED Light Illuminating Apparatus with Wind Tunnel Cooling
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Solution Overview
Problem
Light illuminating apparatuses using LEDs as a light source face issues with reduced emission efficiency and lifespan due to heat generation, leading to heating of the housing and non-uniform cooling of multiple LEDs, which results in lighting and curing non-uniformity of UV curable inks.
Innovation Solution
A light illuminating apparatus with a substrate and a heat dissipation unit featuring heat sink fins, a wind tunnel, and cooling fans to ensure uniform cooling of LEDs, preventing housing heating and maintaining temperature uniformity across multiple LEDs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If a heat dissipation element (heat sink) is used to suppress heat generation of LEDs, then the housing heating is reduced, but the temperature distribution becomes non-uniform causing lighting non-uniformity
Solution Approach 1:
The heat dissipation element is divided into multiple independent heat dissipation units, each corresponding to individual LEDs. This segmentation allows independent temperature control and heat dissipation for each LED, preventing temperature differences between adjacent LEDs while effectively reducing overall housing temperature.
Solution Approach 2:
Each heat dissipation unit is designed with localized heat dissipation structures (heat dissipation fins) that are thermally coupled to specific LEDs. This creates local quality variations in the heat dissipation system, where each region optimizes heat removal for its corresponding LED, ensuring uniform temperature distribution across all LEDs while effectively managing local heat generation.
2Productivity
If multiple LEDs are arranged in the light illuminating apparatus, then the curing efficiency is improved, but the heat generation increases leading to housing heating
Solution Approach 1:
The apparatus segments the heat dissipation function into multiple independent units, each dedicated to specific LEDs. This allows the system to accommodate multiple LEDs (improving curing efficiency) while independently managing the heat from each LED, preventing cumulative heat buildup in the housing.
Solution Approach 2:
The heat dissipation units act as intermediary components between the LEDs and the housing. They provide a thermal interface that conducts heat away from LEDs before it can transfer to the housing, thus allowing multiple LEDs to operate simultaneously without causing housing heating.
3Volume of moving object
If LEDs are closely arranged to reduce apparatus size, then the compactness is improved, but the heat dissipation becomes insufficient causing temperature non-uniformity
Solution Approach 1:
The heat dissipation units extend in the vertical direction (thickness direction) with heat dissipation fins, utilizing the third dimension for heat dissipation. This allows LEDs to be closely arranged in the horizontal plane (reducing apparatus footprint) while maintaining effective heat dissipation through vertical fin structures, preventing temperature non-uniformity despite close spacing.
Solution Approach 2:
The heat dissipation fins are nested within the housing structure, with each heat dissipation unit integrated into the housing's internal space. This nested arrangement allows compact integration of heat dissipation functionality within the limited apparatus volume, maintaining temperature uniformity without increasing overall apparatus size.
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 achieves uniform cooling of LEDs, reducing lighting non-uniformity and allowing for efficient curing of UV curable inks while minimizing the apparatus size by preventing housing heating, thus enhancing the overall performance and reliability of the light illuminating apparatus.
Implementation Method 1
a first cooling fan which generates the cooling wind flowing in the first direction within the wind tunnel
Implementation Method 2
a heat dissipation unit having a plurality of heat sink fins installed erectly at a predetermined interval along the first direction, and thermally coupled to an opposing surface side of the substrate
Implementation Method 3
a light source unit having a plurality of light sources arranged along the first direction on a surface of the substrate
Implementation Method 4
irradiates, onto a target surface, light of a line shape extending in a first direction and having a predetermined line width in a second direction perpendicular to the first direction
Data Source
AI summary
(Problem)To provide a small light illuminating apparatus configured to uniformly cool a plurality of light emitting diodes (LEDs)(Problem-solving approach)A light illuminating apparatus that irradiates light of a line shape includes a light source unit having a plurality of light sources arranged along a first direction on a surface of a substrate, a heat dissipation unit having a plurality of heat sink fins formed along the first direction, and thermally coupled to an opposing surface side of the substrate, a housing which receives the heat dissipation unit and forms a wind tunnel with a cooling wind flowing inside, wherein the cooling wind cools the heat sink fins, and a first cooling fan which generates the cooling wind flowing in the first direction within the wind tunnel, wherein at least one of opposite sides of a second direction of the housing has an air hole through which the cooling wind is discharged to outside via the plurality of heat sink fins, or the cooling wind is absorbed via the plurality of heat sink fins from outside, and the wind tunnel serves as a pressure chamber in which positive pressure or negative pressure is produced by the cooling wind.