Controller for Light-Emitting Devices with Chromaticity-Based Color Mixing
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Solution Overview
Problem
Lighting designers face challenges in efficiently controlling the color output of light-emitting devices to achieve a McCandless effect and a desired mixed light color, which is time-consuming and complicated due to the need for manual experimentation with multiple lighting fixtures.
Innovation Solution
A controller that allows users to set the color output of one light-emitting device and a desired mixed color, with processing circuitry determining the necessary parameters for the second device to ensure the mixed color is achieved while maintaining the McCandless effect, using a color space chromaticity diagram to calculate and adjust lighting parameters for LED devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If manual experimentation with multiple lighting fixtures is used to achieve desired mixed light color, then the lighting designer can control the color output, but the process becomes time-consuming and complicated
Solution Approach 1:
A controller device is introduced as an intermediary between the lighting designer and the lighting fixtures. The controller includes processing circuitry that automatically calculates the second color and adjusts lighting parameters based on user input for the first color and desired mixed color, eliminating the need for manual experimentation while maintaining precise color control
Solution Approach 2:
The system automatically changes lighting parameters (such as intensity and color temperature) based on mathematical relationships in the color space chromaticity diagram. By calculating the second color parameters from the first color and desired mixed color, the system adjusts fixture settings without requiring the lighting designer to manually experiment with multiple parameters
2Adaptability or versatility
If the lighting designer changes the mixed color, then color versatility is improved, but the McCandless effect may be lost
Solution Approach 1:
The controller continuously monitors and adjusts lighting parameters based on the relationship between first color, second color, and desired mixed color. When the lighting designer changes the mixed color, the processing circuitry automatically recalculates the second color parameters to maintain the McCandless effect, providing real-time feedback control that preserves effect consistency while allowing color versatility
Solution Approach 2:
The system dynamically adjusts the second color parameters in response to changes in the desired mixed color. The processing circuitry continuously calculates new parameter sets that maintain the McCandless effect relationship, allowing the mixed color to be changed while automatically preserving the depth-enhancing effect through dynamic parameter optimization
3Adaptability or versatility
If LED devices are used to provide various colors, then color versatility is improved, but precise control of color mixing becomes more difficult
Solution Approach 1:
The patent replaces manual mechanical adjustment of lighting parameters with an automated electronic control system. The processing circuitry uses mathematical calculations in the color space chromaticity diagram to determine the second color parameters, substituting complex manual control with automated computational logic that simplifies the user interface while handling LED color mixing precision
Data Source
AI summary
The present invention relates to a controller (30) for controlling the light-output of two light-emitting devices (10, 20). The two light-emitting devices are adapted to provide a McCandless effect on an illuminated object (40). The controller (30) comprises a first user interface for a user to set a first color (11) to be output by a first light-emitting device (10) and second user interface for a user to set a desired mixed color (81) of a common area (80) being illuminated by both light-emitting devices (10, 20). The controller (30) further comprises a processing circuitry for determining first lighting parameters resulting in said first color (11) when provided to the first light-emitting device (10), and for determining second lighting parameters resulting in a second color (21) when provided to a second light-emitting device (20). A mix of the first color (11) and the second color (21) provides the mixed color (81). The first color (11) and the mixed color (81) are represented in a color space chromaticity diagram such that they define a line and the second color (21) is determined such that it is located on said line in the color space chromaticity diagram on an opposite side of the desired mixed color (81) relative to the first color (11). Further, the second color (21) is determined by the processing circuitry such that the desired mixed color (81) is achieved when the first (11) and the second (21) colors are mixed.