Lighting System with Constant Illuminance Dimming via Dual Source Control
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Solution Overview
Problem
Existing lighting systems require complex user knowledge to balance different light beams for optimal light distribution, as dimming one type of lighting affects horizontal and vertical illuminance differently, leading to challenges in maintaining desired lighting properties.
Innovation Solution
A lighting system comprising a first and second light source with controllable radiant flux, where the control system adjusts one light source's power in a negative proportional dependence on the other, ensuring consistent directional or spatial lighting properties during dimming.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If multiple light sources with different angular distributions are used to provide both direct and indirect lighting, then lighting quality and room appearance are improved, but control complexity increases as users need knowledge to balance different light beams
Solution Approach 1:
The patent combines multiple light sources with different angular distributions (first light source with narrow distribution, second light source with wide distribution) into a single integrated lighting system. The control system merges the control of both light sources under a single dimming command, automatically balancing their outputs to maintain desired lighting properties without requiring user intervention.
Solution Approach 2:
The control system implements feedback control by monitoring the combined output of both light sources and automatically adjusting their individual intensities. When a dimming command is received, the system calculates the required adjustment for each light source based on their different characteristics, ensuring the overall lighting quality is maintained while simplifying user interaction.
2Illumination intensity
If separate dimming controls are provided for each light source to maintain lighting balance, then lighting quality is maintained, but ease of operation decreases as users need specialized knowledge
Solution Approach 1:
The control system provides a universal dimming control that performs multiple functions simultaneously: it controls both light sources, automatically balances their different angular distributions, and maintains the desired lighting ratio. This single control interface serves all lighting adjustment needs without requiring users to understand the complex interactions between different light sources.
Solution Approach 2:
The system performs self-service by automatically calculating and adjusting the individual dimming levels of both light sources based on a single user command. The control system knows the characteristics of each light source and autonomously balances their outputs to maintain the desired lighting properties, eliminating the need for user expertise in lighting balance.
3Use of energy by moving object
If direct lighting is used to maximize task illuminance efficiency, then energy utilization is improved, but room appearance and ceiling illuminance are reduced
Solution Approach 1:
The patent applies local quality by using different light sources with different angular distributions for different lighting purposes. The first light source with narrow angular distribution provides focused task lighting for efficient energy utilization, while the second light source with wide angular distribution provides diffuse lighting for pleasant room appearance and ceiling illuminance. Each light source is optimized for its specific local function.
Solution Approach 2:
The system dynamically balances the output of direct and indirect lighting components through the control system. When dimming is required, the control system automatically adjusts the ratio between direct (task) lighting and indirect (ambient) lighting to maintain both energy efficiency and aesthetic quality, allowing the lighting characteristics to adapt while preserving the benefits of both approaches.
4Illumination intensity
If indirect lighting is used to enhance room appearance and ceiling illuminance, then room aesthetics are improved, but task lighting efficiency is reduced
Solution Approach 1:
The patent applies local quality by using different light sources with different angular distributions for different lighting purposes. The first light source with narrow angular distribution provides focused task lighting for efficient energy utilization, while the second light source with wide angular distribution provides diffuse lighting for pleasant room appearance and ceiling illuminance. Each light source is optimized for its specific local function.
Solution Approach 2:
The system dynamically balances the output of direct and indirect lighting components through the control system. When dimming is required, the control system automatically adjusts the ratio between direct (task) lighting and indirect (ambient) lighting to maintain both energy efficiency and aesthetic quality, allowing the lighting characteristics to adapt while preserving the benefits of both approaches.
Data Source
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AI summary
The invention provides a lighting system (100) comprising a first light source (10), a second light source (20), and a control system (30), wherein: - the first light source (10) is configured to generate first light source light (11) with a controllable first radiant flux, wherein the first radiant flux is dimmable over a first dimming range; wherein the first light source light (11) has a first angular distribution relative to the lighting system (100); - the second light source (20) is configured to generate second light source light (21) with a controllable second radiant flux, wherein the second radiant flux is dimmable over a second dimming range; wherein the second light source light (21) has a second angular distribution relative to the lighting system (100), different from the first angular distribution; - the control system (30) is configured to control the first light source (10) and the second light source (20), wherein, in a controlling mode of the control system (30), the control system (30) is configured to control a value of one of the first radiant flux and the second radiant flux with a negative proportional dependence of a change in a value of the other of the first radiant flux and the second radiant flux over at least a respective part of the respective dimming range.