Tunable White Light Source Object Appearance Control
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Solution Overview
Problem
Existing white LED lighting systems struggle to maintain a consistent white appearance while enhancing the visual appeal of objects, as manipulation of light properties can disrupt the overall visual experience in settings that require continuous white illumination.
Innovation Solution
A system comprising a tunable white light source with a color-mixing multiple LED arrangement, a camera, and a light control module that captures images of objects, identifies optimal lighting conditions based on object attributes, and adjusts chromatic properties like brightness, color temperature, and color rendering to enhance object appearance without altering the overall white light appearance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If manipulation of light properties (brightness, color temperature, color rendering) is applied to enhance object appearance, then object visual appeal is improved, but overall white light appearance is disrupted
Solution Approach 1:
The patent applies different chromatic properties to different spatial zones within the illumination environment. By dividing the illumination area into multiple zones with independent controllable light properties, the system enhances object appearance in specific locations while preserving the overall white light appearance in other areas. This local differentiation allows selective optimization of color rendering for objects without compromising the general illumination quality.
Solution Approach 2:
The system dynamically adjusts chromatic properties of light outputs based on real-time detection of objects and their attributes. The controller modifies brightness, color temperature, and color rendering properties adaptively, allowing the lighting system to respond to changing conditions. This dynamic adjustment enables the system to enhance object appearance when needed while maintaining overall white light appearance during normal operation.
2Illumination intensity
If chromatic properties of LED light source are manipulated to alter brightness and color temperature, then color appearance of light is improved, but spectral composition complexity increases
Solution Approach 1:
The patent segments the LED light source into multiple independent LED elements or groups of LEDs, each capable of emitting light with different chromatic properties. This segmentation allows individual control of different LED components to achieve desired spectral compositions without requiring complex manipulation of a single light source. The segmented structure simplifies control by enabling independent adjustment of each segment's output characteristics.
Solution Approach 2:
The system achieves spectral composition control by changing operational parameters of the LED elements, such as drive current, pulse width modulation duty cycle, and mixing ratios of different colored LEDs. Rather than physically altering the light source structure, the patent utilizes parameter adjustments to achieve diverse chromatic outputs, thereby reducing device complexity while maintaining illumination quality.
3Use of energy by moving object
If white LED lighting is used to match incandescent efficacy, then energy efficiency is improved, but control flexibility for maintaining continuous white appearance is reduced
Solution Approach 1:
The patent designs the LED lighting system to perform multiple functions simultaneously: providing energy-efficient illumination, maintaining continuous white appearance, and enhancing object color rendering. By integrating multiple LED elements with different chromatic properties into a unified controllable system, the patent achieves versatility in lighting control while preserving the energy efficiency advantages of LED technology. The multi-functional design allows a single system to address various lighting requirements without compromising any single performance aspect.
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 system effectively enhances object appearance by providing optimal lighting conditions that make objects more saturated and visually distinct while maintaining the overall white light appearance, suitable for applications like retail and medical settings.
Implementation Method 1
the use of light emitting diodes (LEDs) has provided numerous benefits over the conventional lighting sources
Implementation Method 2
lamps have used LEDs as a light source to increase efficacy
Data Source
AI summary
A system for controlling a light source to enhance the appearance of one or more objects within an environment illuminated by the light source. The system includes a tunable white light source to illuminate an object and a camera configured to capture one or more digital images the object and identify attributes of the object, including object color values. The system further includes a light control module configured to determine at least one optimal lighting condition for the light source based, at least in part, on the object attributes, wherein the optimal lighting condition is configured to enhance the appearance of the object illuminated by the light source while maintaining the overall appearance of light within the environment. The light control module is further configured to adjust the spectral composition of the light source based on the optimal lighting condition.