UV Irradiation Device with Dynamic Wavelength Control
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Solution Overview
Problem
Current ultraviolet-curing resin curing technologies face inefficiencies in curing speed and electrical power consumption, as they rely on fixed wavelength ultraviolet irradiation devices that do not adapt to the specific curing requirements of different resins.
Innovation Solution
An ultraviolet irradiation device comprising multiple light-emitting elements with different peak wavelengths, a temperature control system, and a control circuit that adjusts the temperature and current to emit ultraviolet light with a peak wavelength optimized for efficient curing, using pulse currents to prevent temperature increases and wavelength shifts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a fixed wavelength ultraviolet irradiation device is used, then the device structure is simple, but the curing efficiency is low and cannot adapt to different resin requirements
Solution Approach 1:
The ultraviolet irradiation device is segmented into multiple light-emitting elements, each emitting at a different peak wavelength. This allows the system to select the appropriate wavelength for different resin types, improving curing efficiency without requiring a completely different device for each application.
Solution Approach 2:
The device incorporates dynamic control capabilities through a control circuit that can selectively activate different light-emitting elements based on the resin type. The temperature control element also provides dynamic temperature adjustment, enabling the system to adapt to different curing requirements in real-time.
2Productivity
If high power is used to speed up curing, then the curing speed increases, but the temperature of the light-emitting element increases causing wavelength shifts
Solution Approach 1:
The device incorporates a temperature control element that monitors and adjusts the temperature of the light-emitting element in real-time. This feedback mechanism ensures that even when high power is applied for fast curing, the temperature remains stable and the peak wavelength does not shift, maintaining curing quality.
Solution Approach 2:
The system changes the operating parameters (current pulse width, duty cycle) of the light-emitting elements to achieve high curing speeds without excessive temperature rise. By using short pulse widths (10ms or less) and appropriate duty cycles, the device delivers high peak power for effective curing while allowing cooling periods that prevent temperature accumulation.
3Illumination intensity
If continuous current is applied to the light-emitting element, then the radiant flux is high, but the temperature increases and wavelength shifts occur
Solution Approach 1:
Instead of continuous current, the device uses periodic pulse current with pulse widths of 10 milliseconds or less. This periodic action delivers high radiant flux during the pulse to ensure effective curing, while the intervals between pulses allow the light-emitting element to cool down, preventing temperature accumulation and wavelength shifts.
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
Enables efficient curing of ultraviolet-curing resins by selecting the appropriate peak wavelength and radiant flux, reducing power consumption and ensuring seamless control across a wide wavelength range, while preventing unnecessary temperature fluctuations.
Implementation Method 1
a light-emitting element configured to emit an ultraviolet light
Implementation Method 2
A relationship between a temperature of a light-emitting element and a peak wavelength of an ultraviolet light to be emitted by the light-emitting element is acquired
Implementation Method 3
An ultraviolet-curing resin that is cured by irradiating an ultraviolet ray
Data Source
AI summary
An ultraviolet irradiation device includes a light-emitting element, a temperature control element, and a control circuit. The light-emitting element is configured to emit an ultraviolet light. The temperature control element is configured to control a temperature of the light-emitting element. The control circuit is configured to control the temperature control element based on a voltage of the light-emitting element so as to control a peak wavelength of the ultraviolet light.