Filter Lens with Irregular Slots for Uniform LED Illumination
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Solution Overview
Problem
LED lamps often suffer from uneven illumination, with excessive brightness near the source and insufficient illumination farther away due to concentrated illuminance, making it difficult to achieve uniform brightness across the desired irradiation range.
Innovation Solution
A filter lens with irregular slots and curved strips is integrated into the LED lamp, where the light incident surface features a series of irregular slots with concave and convex lenses, and the light-emitting surface comprises curved strips, allowing for the expansion of the irradiation range and uniformization of brightness by adjusting the positional relationship between the LED lamp and the illuminated surface.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If LED lamps use conventional light sources with simple lenses, then the device structure is simple and manufacturing is easy, but the illumination is concentrated near the lamp causing uneven brightness and limited irradiation range
Solution Approach 1:
The filter lens is divided into multiple irregular slots arranged in sequence, where each slot contains independent concave and convex lens sections. This segmentation allows different regions of the lens to redirect light to different areas, distributing illumination more evenly across the irradiation range while managing the complexity through modular design
Solution Approach 2:
Different sections of the filter lens are designed with different optical properties - concave lens portions in some slots and convex lens portions in others. This local differentiation enables specific control over light distribution in different directions, achieving uniform illumination across varying distances from the light source
2Area of stationary object
If the light is emitted directly from the LED lamp without redirection, then the device complexity is low, but the illuminance is too concentrated in the vertical direction near the lamp and insufficient in farther places
Solution Approach 1:
The irregular slots are arranged in a specific sequence and orientation, with their extending directions and arrangements designed to redirect light not only horizontally but also at different vertical angles. This multi-dimensional light redirection expands the effective irradiation range while distributing illuminance more evenly across both near and far areas
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 ensures substantially uniform illuminance across the illuminated area, compensating for attenuation at greater distances by directing more light to areas farther from the lamp, resulting in consistent illumination near and far from the LED lamp.
Implementation Method 1
the outline of each of the irregular slots comprises a irregular slot optical axis, a concave lens on the side of the irregular slot optical axis, and a convex lens on the other side of the irregular slot optical axis
Data Source
AI summary
A filter lens, an LED lamp with the filter lens, and an illumination system, the illumination system comprises an LED lamp with a filter lens, and an illuminated surface. The LED lamp with a filter lens comprises a light-emitting module, a collimating lens, and a filter lens, the filter lens comprises a light incident surface, and a light-emitting surface disposed on an opposite side of the light incident surface. The light incident surface comprises a plurality of irregular slot arranged end to end. Since the illumination system uses the LED lamp with a filter lens, and the filter lens of the LED lamp with the filter lens comprises the above-mentioned irregular slot, to adjust the positional relationship between the LED lamp with a filter lens and the illuminated surface. relative to the side of the illuminated surface that is closer to the LED lamp, the light directed to one side of the illuminated surface farther from the LED lamp can compensate for more attenuation due to reaching a distance from the LED lamp, it is possible to have substantially the same illuminance in which is near to or far from the LED lamp.