Continuously Adjustable Interior Lighting Without Color Recalibration
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Solution Overview
Problem
Existing luminaire systems for interior spaces, such as in vehicles, require time-consuming and inflexible calibration processes to achieve discrete target colors, necessitating recalibration for changes, which complicates the individualization and flexibility of lighting.
Innovation Solution
An illuminant device with a computing unit and driver unit that calculates and outputs driver current signals based on a calibration algorithm, allowing continuous adjustment of colors without the need for prior calibration, using input color coordinates to directly set target colors through current and voltage adjustments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If discrete calibration values are stored in an electronic module for each target color, then color accuracy is improved, but device complexity and flexibility deteriorate due to the need for recalibration and storage management
Solution Approach 1:
The system performs self-calibration by automatically determining calibration values through measurement of the actual light output from the illuminant elements. The computing unit calculates the difference between measured and reference color values, then automatically adjusts driver current signals without requiring external calibration intervention or storage of pre-stored calibration tables.
Solution Approach 2:
The system performs calibration measurements and calculations in advance to generate calibration values that are then stored for future use. The computing unit determines calibration values through preliminary measurements and stores them in a storage unit, eliminating the need for recalibration when changing target colors.
2Measurement precision
If recalibration is performed for each color change, then color precision is maintained, but time consumption increases significantly
Solution Approach 1:
The system performs calibration measurements and calculations in advance to generate calibration values that are then stored for future use. The computing unit determines calibration values through preliminary measurements and stores them in a storage unit, eliminating the need for recalibration when changing target colors.
Solution Approach 2:
The system performs self-calibration by automatically determining calibration values through measurement of the actual light output from the illuminant elements. The computing unit calculates the difference between measured and reference color values, then automatically adjusts driver current signals without requiring external calibration intervention or storage of pre-stored calibration tables.
3Measurement precision
If calibration values are stored in an electronic module, then discrete colors can be reproduced accurately, but continuous color adjustment and flexibility are limited
Solution Approach 1:
The system transitions from static, pre-stored calibration values to dynamic, continuously adjustable calibration parameters. The computing unit can generate calibration values for any arbitrary color within the color space by performing real-time calculations based on measured illuminant element characteristics, enabling continuous color adjustment rather than discrete color selection.
Solution Approach 2:
The system changes the calibration approach from fixed stored values to dynamically calculated values based on measurable parameters. The computing unit determines calibration values through measurements of actual light output and calculates appropriate driver current signals, allowing continuous adjustment of color parameters rather than selection from discrete stored options.
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
Enables flexible and efficient adjustment of colors with high resolution, compensating for production tolerances and aging effects, improving color perception and individualization of interior lighting without the need for stored calibration values.
Implementation Method 1
The illuminant elements are configured as LEDs
Implementation Method 2
whose perceptible light is mixed from light of several individual luminaires... red, green and blue light-emitting diodes (LEDs) are combined in such a way that their emitted light mixes to form a perceptible colour
Data Source
AI summary
The invention relates to an illuminant device for emitting light of a continuously adjustable colour, more particularly for individualizing and/or illuminating an interior, comprising the following:at least one illuminant unit comprising a plurality of illuminant elements;at least one driver unit which is configured to output driver current signals to the illuminant elements of the illuminant unit in such a way that a target colour of the illuminant unit can be set in accordance with the driver current signals;at least one computing unit, which is configured to calculate the driver current signals necessary for setting the target colour and to control the driver unit accordingly so that the driver unit outputs the driver current signals.