Rotating Polygonal Mirror UV LED Sweeping for Homogeneous Dosage
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Solution Overview
Problem
Existing UV LED technologies face challenges in achieving homogeneous radiation dosage over large areas and long distances due to fixed arrangements and limited wavelength applicability, leading to inefficient sterilization and curing processes, with issues of radiation heat and incomplete curing.
Innovation Solution
A bundle beam UV LED sweeping method using a rotating polygonal multiple-reflective-surface aluminum mirror to convert UV light from a line into a sectorial area, combined with a UV LED light source assembly and reflection chamber for enhanced radiation distribution and homogeneity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If UV LED is arranged in a fixed manner or static multiple-bead array with high density distribution, then the radiation coverage area is increased, but the radiation dosage homogeneity deteriorates
Solution Approach 1:
The patent employs a rotating polygonal mirror to dynamically scan the UV light beam across the treatment area. Instead of using a static high-density bead array, the system uses a single UV LED bead combined with a rotating mirror that sweeps the light coverage dynamically, achieving both large area coverage and homogeneous radiation dosage distribution through motion-based light distribution.
Solution Approach 2:
The rotating polygonal mirror acts as an intermediary between the UV LED light source and the target surface. The mirror reflects and redirects the UV light beam in a sweeping motion, enabling the light to cover a large area while maintaining uniform dosage distribution through controlled reflection angles and rotation speed.
2Object-affected harmful factors
If the projection distance is increased to reduce radiation heat and prevent scorching, then the harmful thermal effects are reduced, but the radiation intensity at the target surface deteriorates
Solution Approach 1:
The rotating mirror creates a periodic sweeping action that delivers UV radiation in controlled pulses to different areas. This periodic delivery allows the target surface to cool between exposures, preventing heat accumulation and scorching, while maintaining high peak radiation intensity during each sweep cycle for effective curing.
Solution Approach 2:
By using dynamic scanning with a rotating mirror instead of static illumination, the system can control the dwell time of UV light on any given point. The rapid movement and periodic exposure prevent heat buildup while delivering sufficient total energy for curing, resolving the contradiction between intensity and thermal damage.
3Area of stationary object
If the radiation area is enlarged to cover large surfaces, then the applicability to large-area sterilization and curing is improved, but the radiation intensity per unit area deteriorates
Solution Approach 1:
The rotating polygonal mirror enables a single UV LED bead to dynamically cover large areas by sweeping the light beam across the treatment zone. The high rotation speed ensures that while each point receives brief exposure, the cumulative effect covers the entire large area with sufficient intensity, achieving both large coverage and adequate radiation intensity per unit area.
Solution Approach 2:
The system adds the time dimension to the radiation process through rotating mirror scanning. Instead of trying to illuminate the entire large area simultaneously (which would dilute intensity), the system illuminates different areas sequentially in time, maintaining high intensity at each location while achieving comprehensive large-area coverage over the scanning cycle.
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 solution provides high radiation dosage with uniform distribution over large areas, effectively sterilizing bacteria and curing UV resins while preventing scorching, and is applicable for disinfection, sterilization, and phototherapy.
Implementation Method 1
a polygonal multiple-reflective-surface aluminum mirror is put into rotation to change the projection direction of ultraviolet light facet for cyclical and successive home-position-returning positional sweeping that converts UV light from a line into a sectorial area
Implementation Method 2
employing bundle beam UV LED ultraviolet light bead to supply a high-dosage radiation intensity
Implementation Method 3
arranged in a reflection chamber for repeated reflection realizable by the reflection chamber to make multiple use of the reflected ultraviolet light to enhance the radiation dosage
Data Source
AI summary
A bundle beam UV LED ultraviolet light sweeping method includes: activating electrical power to input into a PCB to light up a bundle beam UV LED ultraviolet light bead and driving a motor to cause a polygonal multiple-reflective-surface aluminum mirror to rotate, ultraviolet light from the UV LED being projected toward the reflective surface, and reflected by the reflective surface to change light direction for successive back-and-forth home-position-returning sweeping, the light converting from lines into sectorial shapes that are connected to form a large ultraviolet light operation region. The device includes a rotating device having a motor of which a spindle is mounted with a polygonal multiple-reflective-surface aluminum mirror; an UV LED bundle beam light source assembly having a bundle beam UV LED ultraviolet light bead fixed on a PCB; and a fixing base having a main body and a plurality of mounting braces.