Irradiation Device with Sequential UV Sources for Uniform Curing

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Solution Overview

Problem

Existing irradiation devices often result in uneven curing of objects due to insufficient irradiation of certain surfaces, leading to regions that are either over-cured or under-cured.

Innovation Solution

The use of multiple ultraviolet ray sources with different ray distributions and emission peak wavelengths, where one source emits before the other, ensuring comprehensive irradiation of the object by alternating between sources to achieve uniform curing.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Device complexity

If a single ray source is used for irradiation, then the device structure is simple, but uneven curing occurs on the object surface

Engineering Contradiction:
Improveirradiation device structureVSAvoidcuring uniformity
Core Design Contradiction:
Device complexityVSManufacturing precision

Solution Approach 1:

The irradiation device is segmented into multiple ray sources (first ray source and second ray source), each responsible for different regions or angles of irradiation. This segmentation allows comprehensive coverage of the object surface, eliminating shadow regions and improving curing uniformity without requiring an overly complex single-source system

Inventive Principle:
Principle #1Segmentation

2Manufacturing precision

If multiple ray sources with different ray distributions are used, then curing uniformity is improved, but the device complexity increases

Engineering Contradiction:
Improvecuring uniformityVSAvoidray source configuration
Core Design Contradiction:
Manufacturing precisionVSDevice complexity

Solution Approach 1:

Different ray sources are configured with different ray distributions tailored to specific local requirements. The first ray source provides one type of ray distribution while the second ray source provides another, allowing each source to optimize its contribution to specific regions of the object, achieving overall uniformity through localized optimization

Inventive Principle:
Principle #3Local quality

Solution Approach 2:

Multiple ray sources with different ray distributions are merged into a single irradiation system. The controller coordinates the operation of these sources to combine their effects, achieving comprehensive and uniform irradiation coverage that neither source could accomplish alone

Inventive Principle:
Principle #5Merging (Combining)

3Manufacturing precision

If sequential irradiation with multiple ray sources is implemented, then curing uniformity is improved, but irradiation time increases

Engineering Contradiction:
Improvecuring uniformityVSAvoidirradiation time
Core Design Contradiction:
Manufacturing precisionVSLoss of time

Solution Approach 1:

The controller implements periodic or sequential activation of different ray sources. By alternating between the first and second ray sources in a controlled sequence, the system achieves comprehensive coverage while optimizing the total irradiation time, preventing both under-curing and excessive exposure time

Inventive Principle:
Principle #19Periodic action

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

This approach reduces uneven curing by ensuring all surfaces of the object receive adequate ultraviolet exposure, improving the overall curing process efficiency and uniformity.

Implementation Method 1

a first ray source configured to emit first ultraviolet ray

Methodology Applied
Scientific EffectUltraviolet emission: Light

Implementation Method 2

a second ray source configured to emit second ultraviolet ray having a ray distribution different from a ray distribution of the first ultraviolet ray

Methodology Applied
Scientific EffectUltraviolet emission: Light

Implementation Method 3

an irradiation controller configured to cause the object to be irradiated with the first ultraviolet ray prior to the second ultraviolet ray

Methodology Applied
Scientific EffectPhotopolymerization: Photopolymerisation

Data Source

PatentUS20250332611A1Irradiation device, ray-emitting device, and ultraviolet ray irradiation method
Publication Date: 2025.10.30 NICHIA CORP
  • US20250332611A1 patent drawing
  • US20250332611A1 patent drawing
  • US20250332611A1 patent drawing

AI summary

An irradiation device configured to irradiate an object with ray is provided. The irradiation device includes a ray-emitting device including a first ray source and a second ray source that emit ultraviolet ray having different ray distributions, a placement table including an arrangement region in which the object is disposed for irradiation, and an irradiation controller that causes the object to be irradiated with the ultraviolet ray from the first ray source prior to the ultraviolet ray from the second ray source.