White Point Determination for Multi-Color Lighting Scenes
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Solution Overview
Problem
Modern lighting devices lack intuitive and simplified control options for emitting white light, which is essential for various applications such as reading, navigation, and illuminating objects, and some devices are limited in their color output, requiring a method to determine a suitable white point from a set of colors for effective lighting control.
Innovation Solution
A method that receives a set of colors, determines a set of white points, and calculates a single white point based on these, allowing lighting devices to emit white light that is a specific mixture of frequencies, tailored to the colors in the scene, either through user input or automatic generation, and can be adjusted for processing efficiency and device limitations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a lighting device emits colored light to create atmosphere, then the aesthetic effect is improved, but the functionality for tasks like reading and navigation deteriorates
Solution Approach 1:
The lighting device dynamically switches between colored light modes for atmosphere creation and white light modes for functional tasks. The controller adjusts the light output based on detected user needs, allowing the same device to serve both aesthetic and functional purposes at different times.
Solution Approach 2:
The lighting device is designed to perform multiple functions: creating atmospheric effects with colored light and providing functional illumination with white light. This multi-functionality allows a single device to replace separate devices for different purposes.
2Ease of manufacture
If a lighting system uses multiple colors of light, then the visual appeal is improved, but the ability to provide natural white light deteriorates
Solution Approach 1:
The lighting system segments the color output into distinct categories: colored light for atmosphere and white light for functionality. The controller manages these segments separately, ensuring that when white light is needed, it provides natural illumination without being contaminated by colored light hues.
Solution Approach 2:
The controller acts as an intermediary between the light sources and the user's needs. It processes user input, detects the required light type, and coordinates the appropriate light output, ensuring that colored and white light sources work together harmoniously without compromising either function.
3Ease of operation
If the lighting device is controlled with simple user interface, then the ease of operation is improved, but the precision of color control deteriorates
Solution Approach 1:
The lighting device performs self-service by automatically detecting user needs and selecting appropriate light modes. The system uses sensors to detect ambient light, user activity, and contextual information to autonomously determine when colored or white light should be emitted, reducing the need for manual control while maintaining precision.
Solution Approach 2:
The system incorporates feedback mechanisms where sensors continuously monitor the lighting environment and user interactions. This feedback loop allows the controller to adjust light output in real-time, maintaining precise color control while keeping the user interface simple through automated responses to detected conditions.
Data Source
AI summary
When a light scene comprises multiple colors of light, not all white light is suitable for matching the scene. A method is provided such that a white point is determined for each color in a set of colors, to create a set of white points. A single white point is then determined based on the set of white points. This allows, for example, a user to select a light scene (e.g. a romantic scene featuring red colors) for a living room, such that lighting devices contributing to the scene emit colored light. A functional lighting device (e.g. reading light) can then emit white light, determined according to the method, to provide more functional light (e.g. light suitable for reading) that matches the scene (e.g. warm white instead of cold white).