Inclined Mount Base LED Reflector for Uniform UV Curing
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Solution Overview
Problem
Conventional light emitting devices, particularly those using ultraviolet LEDs, face inefficiencies in light distribution and irradiation, leading to reduced light intensity and uneven curing of inks in offset printing, especially when the distance between the light source and the printed matter is significant, and when there are adjacent areas that should not be irradiated.
Innovation Solution
A light emitting device comprising a mount base with inclined plane portions, a light source portion with linearly aligned LEDs, and a reflector with distinct reflective surfaces that focus and redirect light to achieve efficient light distribution, reducing wastage and increasing peak illuminance by reflecting light perpendicularly and at narrow angles to ensure uniform irradiation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a cylindrical reflective mirror with paraboloid surface is used, then light can be focused at the focal point, but light distribution becomes uneven and peak illuminance is reduced at larger distances
Solution Approach 1:
The reflective mirror is divided into multiple reflective surfaces (first reflective surface, second reflective surface, third reflective surface) with different orientations and functions. Each surface segment directs light to specific areas, enabling precise control of light distribution while maintaining high peak illuminance at the target position.
Solution Approach 2:
Different regions of the reflective mirror are designed with different reflective properties and orientations. The first reflective surface faces the light source directly, the second reflective surface is oriented at a specific angle to redirect light, and the third reflective surface handles peripheral light redirection. This local differentiation optimizes light distribution uniformity while preserving peak illuminance.
2Use of energy by moving object
If the light source is positioned at the focus of the cylindrical reflective mirror, then light can be concentrated, but adjacent areas that should not be irradiated receive unwanted light
Solution Approach 1:
Each reflective surface is specifically oriented to direct light only to intended target areas. The first reflective surface directs light to the primary target, the second reflective surface redirects light to secondary areas, and the third reflective surface handles peripheral directions. This localized control prevents light from reaching adjacent areas that should not be irradiated, eliminating unwanted side effects while maintaining efficient light concentration.
Solution Approach 2:
The reflective mirror is segmented into multiple independently oriented surfaces that control light paths to different regions. This segmentation allows precise control over which areas receive light, preventing stray light from reaching unintended adjacent areas while maintaining efficient light concentration at authorized targets.
3Area of stationary object
If the distance between light source and printed matter is increased, then larger area can be covered, but light intensity decreases and curing efficiency is reduced
Solution Approach 1:
The reflective mirror is divided into multiple surfaces that work together to redirect light from the source to cover a larger area while maintaining intensity. By segmenting the reflection paths, the system can distribute light over extended distances without significant intensity loss, enabling effective curing of printed matter at larger working distances.
Solution Approach 2:
The invention utilizes multiple reflective surfaces oriented at different angles and positions, effectively adding dimensional complexity to the light path control. This multi-dimensional approach allows light to be redirected through various paths to cover larger areas while maintaining concentration and intensity, overcoming the inverse-square law limitations of simple point-source illumination.
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 device enhances light distribution characteristics and peak illuminance, allowing for effective curing of inks over larger distances and minimizing irradiation of undesired areas, thus improving the efficiency and precision of ultraviolet light application in printing processes.
Implementation Method 1
The reflector includes a first reflective surface and a second reflective surface. Light emitted from the light source portion is reflected on the first reflective surface to be emitted from the light emitting device in the emission direction. The light emitted from the light source portion is reflected on the second reflective surface toward the first reflective surface.
Data Source
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AI summary
A light emitting device includes a mount base, a light source portion, and a reflector. The mount base includes a first plane portion and a second plane portion that inclines with respect to the first plane portion. The first plane portion is provided to be parallel to an emission direction of the light emitting device. The light source portion is mounted on the second plane portion and includes at least one light emitting element. The reflector includes a first reflective surface and a second reflective surface. Light emitted from the light source portion is reflected on the first reflective surface to be emitted from the light emitting device in the emission direction. The light emitted from the light source portion is reflected on the second reflective surface toward the first reflective surface.