Common Lens Illumination Device for Uniform Lighting
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Solution Overview
Problem
Existing lighting devices with perforated panels and lenses suffer from uneven room illumination and color shifts due to manufacturing and assembly tolerances, particularly when using inexpensive LED modules with dome-shaped primary lenses, leading to sensitivity issues with light source positioning and glare.
Innovation Solution
Combining light from multiple sources with different colors and color temperatures behind a common lens, which emits both direct and indirect beam components with overlapping radiation angles to achieve uniform illumination, and using a control device to adjust the power ratio of these sources for desired light color and intensity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a single light source is used with a lens to create a constricted beam through a small light passage opening, then the beam can be precisely directed and the light source can be hidden, but the system becomes highly sensitive to positioning tolerances and manufacturing defects, resulting in uneven illumination and color shifts
Solution Approach 1:
The patent combines multiple light sources (at least two LEDs) behind a single lens to form a common beam. This merging approach distributes the light generation across multiple sources, so that positioning tolerances and manufacturing defects in individual LEDs do not cause significant illumination不均匀ity or color shifts, as the defects are averaged out across the combined light output
Solution Approach 2:
The patent changes the parameter of light source configuration from a single point source to multiple distributed sources. By using multiple LEDs with potentially different characteristics (color, intensity), the system achieves more robust performance against manufacturing tolerances while maintaining the constricted beam geometry through the lens design
2Object-affected harmful factors
If small light passage openings are used to hide the lenses and lamps, then the light sources can be concealed and glare is reduced, but the beam must be precisely constricted and aligned, increasing sensitivity to positioning tolerances
Solution Approach 1:
By merging multiple light sources behind one lens, the system maintains the small light passage opening geometry needed for concealment and glare reduction, while the multiple sources provide tolerance compensation that reduces the sensitivity to alignment precision requirements
Solution Approach 2:
The light generation function is segmented into multiple independent LED sources, each contributing to the overall beam. This segmentation allows each individual source to have some positioning variation while the collective output remains consistent, reducing the overall sensitivity to alignment precision
3Ease of manufacture
If inexpensive LED modules with dome-shaped primary lenses are used, then the cost is reduced, but positioning tolerances move LED chips off-center, increasing problems of uneven light propagation and patchy radiation fields
Solution Approach 1:
The patent combines multiple inexpensive LED modules (each with dome-shaped primary lenses and potential positioning tolerances) behind a common secondary lens. The merging of light from multiple potentially misaligned sources creates a composite beam that averages out the positioning errors, maintaining uniform illumination despite the use of low-cost components
Solution Approach 2:
The patent accepts the use of inexpensive, potentially lower-precision LED modules and compensates for their limitations through the multi-source configuration. Rather than requiring expensive, high-precision single LEDs, the system uses multiple cheaper modules whose collective output achieves the desired uniformity through statistical averaging of their individual variations
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 significantly reduces sensitivity to manufacturing and assembly tolerances, providing uniform room illumination and allowing easy adjustment of light color or color temperature, while minimizing glare and patchy radiation fields.
Implementation Method 1
lenses are assigned to the lamps, which capture the emitted light and form it into a roughly hourglass-shaped beam of rays
Implementation Method 2
said indirect beam component, the beams of which can be reflected on the lateral surface of the lens
Data Source
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AI summary
The present invention relates to a lighting device, in particular in the form of ceiling spotlights, with a perforated panel (3) having at least one light transmission opening (4) and a lens (6) arranged behind the perforated panel (3) for emitting a beam of light rays (7) which tapers away from the lens (6) towards the perforated panel (3), passes through the light transmission opening (4) and widens again away from the perforated panel (3).According to the invention, several light sources (2) are associated with a common lens (6), the light of which is captured by the common lens (6) and passes through a light transmission aperture (4) in the form of the said beam of light (7), which tapers away from the lens (6) towards the perforated panel (3), and widens again away from the perforated panel (3), wherein the said lens (6) is contoured such that a direct radiation component (14) emitted without reflection by the lens (6) and an indirect radiation component (15) emitted reflected by the lens (6) have essentially the same radiation angles (16, 17) and each substantially completely fills the total beam of light (7) emitted by the lens (6).