UV-LED Irradiation Device for Ink Adhesion
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing ultraviolet ray irradiation apparatuses face challenges in achieving strong adhesion between ultraviolet ray curable ink and targets due to low illumination intensity and environmental factors, which affect the curing process.
Innovation Solution
A light irradiation apparatus with a light irradiation device featuring densely arrayed UV-LEDs on a base with reflective openings and a light irradiation chamber that maintains a consistent temperature, enhancing light extraction efficiency and surface free energy for improved adhesion, regardless of environmental conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If ultraviolet ray irradiation elements are used to replace traditional lamps, then energy consumption is reduced and durability is improved, but illumination intensity becomes insufficient for effective curing
Solution Approach 1:
The patent combines multiple ultraviolet ray irradiation elements (first and second irradiation elements) into a single integrated structure. This merging approach accumulates the illumination output of individual low-intensity elements to achieve the total intensity required for effective curing, while maintaining the energy efficiency and durability benefits of using ultraviolet ray irradiation elements instead of traditional high-pressure lamps.
Solution Approach 2:
The irradiation system is divided into multiple separate ultraviolet ray irradiation elements positioned at different locations (first irradiation element for first surface, second irradiation element for second surface). This segmentation allows each element to operate at optimal low power levels while collectively providing sufficient total illumination intensity for curing the ultraviolet ray curable ink.
2Illumination intensity
If conventional lighting systems are used, then sufficient illumination intensity is achieved, but adhesion between ultraviolet ray curable ink and target deteriorates due to environmental factors
Solution Approach 1:
The patent controls the temperature parameter within the light irradiation chamber to maintain it at 50°C or higher. This parameter change (elevating and stabilizing temperature) improves the adhesion between ultraviolet ray curable ink and target by creating optimal curing conditions, thereby achieving reliable adhesion even when using multiple low-intensity irradiation elements instead of conventional high-intensity lighting systems.
3Power
If multiple irradiation elements are mounted on support, then sufficient ultraviolet ray energy is obtained, but adhesion between ink and target becomes difficult to increase regardless of environment and ink type
Solution Approach 1:
The patent introduces temperature control as an additional parameter to optimize adhesion. By maintaining the light irradiation chamber at 50°C or higher, the system creates favorable thermal conditions that enhance ink adhesion to the target, complementing the ultraviolet ray energy provided by multiple irradiation elements and overcoming the adhesion problems that persist in conventional systems.
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 apparatus achieves strong adhesion between ultraviolet ray curable ink and targets by optimizing light intensity and surface free energy, ensuring effective curing across various environments and ink types.
Implementation Method 1
a light irradiation device (2) in which a light emitting element (20) is disposed on one main surface (11) of a base (10)
Implementation Method 2
the base (10) having opening portions (12) on the one main surface (11) and having a reflective layer (103) in each of the opening portions (12)
Implementation Method 3
a heating mechanism for heating the light irradiation chamber (3), thereby increasing surface free energy of the ultraviolet ray curable ink (5)
Data Source
AI summary
A light irradiation apparatus of the embodiment is a light irradiation apparatus that emits light including an ultraviolet ray to a target relatively moving in one direction, including a light irradiation device in which a light emitting element is disposed on one main surface of a base; and a light irradiation chamber in whose internal space the target moves with a light-irradiated surface up from an entrance to an exit thereof in the one direction, the light irradiation device being disposed in an upper section of the internal space.