Oblong Optic Lighting Apparatus for Uniform Rotational Symmetry
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Solution Overview
Problem
Existing lighting apparatuses that generate white light struggle to produce adjustable correlated color temperature (CCT) with uniform light distribution without increasing optic size or reducing output light, as they often result in a checkerboard pattern or reduced light intensity when trying to achieve rotational symmetry.
Innovation Solution
A lighting apparatus with oblong optics and linearly arranged light sources of different CCTs, where each optic is configured to emit a rotationally symmetric output beam, allowing for adjustable CCT by varying the intensity of the light sources and using textures to enhance light mixing and distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a checkerboard pattern of light sources with different CCTs is used with a rotationally symmetric optic, then white light tuning capability is achieved, but the optic size increases and the light distribution appears as a checkerboard pattern
Solution Approach 1:
The patent applies asymmetry by using an oblong optic instead of a rotationally symmetric optic. The oblong shape has a long axis parallel to the linear arrangement of light sources, allowing the optic to efficiently collect light from the linear array while producing a rotationally symmetric light distribution pattern. This asymmetric optic design reduces the required optic size compared to using multiple light sources with a symmetric optic.
2Stability of the object's composition
If only one color is turned on at a time to achieve a more uniform light distribution, then the light distribution uniformity improves, but the amount of output light is reduced by a factor of two
Solution Approach 1:
The patent segments the light sources into two groups with different CCTs (first light source with 2700K and second light source with 5000K) arranged linearly. Both light sources operate simultaneously and their light is collected by the oblong optic, which mixes the different color temperatures to produce a uniform rotationally symmetric light distribution. This segmentation approach allows both colors to contribute to the output while maintaining uniformity through the optic's light mixing capability.
3Stability of the object's composition
If multiple light sources with different CCTs are arranged to produce rotationally symmetric light distribution, then the light distribution uniformity improves, but color bias increases
Solution Approach 1:
The patent applies local quality by positioning specific light sources with different CCTs at specific locations along the linear array. The first light source (2700K) and second light source (5000K) are placed at different positions, and the oblong optic collects light from each position to create a rotationally symmetric distribution. This spatial arrangement of different color temperatures with different local properties allows the optic to mix the light effectively, producing uniform distribution with minimal color bias.
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
The solution achieves a substantially rotationally symmetric light distribution with minimal color bias and increased light output, maintaining uniformity and adjustability of CCT while avoiding the issues of increased optic size and reduced light intensity.
Implementation Method 1
The optic may be a total internal reflector (TIR)
Data Source
AI summary
Disclosed herein are lighting apparatuses that have an oblong optic that corresponds to a plurality of light sources. According to certain embodiments, a lighting apparatus includes a plurality of light sources that are arranged along a linear direction, and an optic that is configured to receive light from each light source of the plurality of light sources. The optic has an oblong shape with a long axis that is parallel to the linear direction, and the optic is configured to emit an output light beam that is substantially rotationally symmetric in a plane that is orthogonal to an emission direction of the plurality of light sources.