LED Irradiation Device Alternating Current Direction
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Solution Overview
Problem
Existing ultraviolet irradiation devices with LED arrays experience illumination distribution bias due to aligned current directions, leading to uneven illumination and potential curing issues in image recording devices.
Innovation Solution
The irradiation device incorporates alternating current directions in adjacent LED rows to counteract illumination distribution bias, with each row connected in series and aligned orthogonally to the array direction, allowing for balanced peak illumination and simplified wiring.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If all LED rows are arranged with current flowing in the same direction, then the structure is simple and easy to manufacture, but the illumination distribution becomes biased and uneven
Solution Approach 1:
The patent applies asymmetry by making adjacent LED rows have opposite current directions. Specifically, in alternating LED rows, the current flows in opposite directions, which causes the illumination peaks to be distributed more uniformly across the array rather than being biased to one side. This asymmetric current arrangement resolves the contradiction by sacrificing current direction uniformity to achieve illumination uniformity.
2Illumination intensity
If LED rows are arranged with alternating current directions, then illumination distribution uniformity is improved, but the wiring complexity increases
Solution Approach 1:
The patent applies segmentation by dividing the LED array into multiple independent LED rows, each with its own current path. This segmentation allows each row to have optimized current direction for uniform illumination while keeping the wiring for each row relatively simple. The overall complexity is managed by repeating this segmented pattern across multiple rows.
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 configuration effectively inhibits illumination distribution bias, ensuring uniform curing of photocurable liquids on recording media and facilitating efficient ink curing in image recording devices.
Implementation Method 1
The present invention relates to an irradiation device equipped with a plurality of LEDs (Light Emitting Diodes)
Implementation Method 2
The irradiation device is configured and arranged to cure the liquid discharged on the recording media by irradiating light on the recording media
Data Source
AI summary
An irradiation device includes a first LED row having a plurality of LEDs aligned in one row and electrically connected in series, and a second LED row having a plurality of LEDs aligned in one row and electrically connected in series. The first LED row and the second LED row are aligned adjacent to each other in a direction that crosses an array direction of the LEDs of the first LED row. A direction of current flowing in the first LED row is opposite to a direction of current flowing in the second LED row.