LED Accent Color Compensation for Luminance-Induced Perception Shifts
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Perceived color of accent lights in lighting systems is influenced by surrounding reference luminance, leading to unintended changes in perceived color, which current technologies fail to compensate for effectively.
Innovation Solution
A method and system that determine desired color perception independent of reference luminance, calculate corrected color components, and adjust drive conditions for light sources, such as LEDs, to maintain the intended accent color appearance despite varying reference luminance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the intensity level of reference luminance is modified to create lighting effects, then the aesthetic versatility is improved, but the perceived color accuracy of accent lights deteriorates due to color perception changes
Solution Approach 1:
The system changes the drive conditions (current, voltage, pulse width modulation duty cycle) of accent light sources based on the detected reference luminance level. When reference luminance increases, the system adjusts parameters such as reducing the accent light intensity or shifting its spectral composition to compensate for the luminance-induced color perception shift, thereby maintaining accurate color rendering across varying lighting conditions
Solution Approach 2:
The system implements a feedback mechanism where the reference luminance is continuously measured using luminance sensors or calculated from control signals, and this information is fed back to the control electronics. The control electronics then dynamically adjust the drive conditions of accent lights based on the feedback signal, creating a closed-loop control system that maintains color accuracy despite changes in reference luminance
2Stability of the object's composition
If drive conditions are adjusted to compensate for reference luminance effects, then the perceived color consistency is improved, but the device complexity increases due to additional control electronics
Solution Approach 1:
The control electronics perform multiple functions: they control the reference luminance intensity, measure or calculate reference luminance levels, determine the appropriate compensation, and adjust the drive conditions of accent lights. By integrating these functions into a single multi-functional control unit, the system achieves color consistency without proportionally increasing device complexity
Solution Approach 2:
The system uses its own control infrastructure to measure reference luminance (either through dedicated sensors or by monitoring its own output signals) and automatically adjusts accent light drive conditions without requiring external calibration or manual intervention. The control electronics self-regulate the color accuracy based on real-time operating conditions
3Adaptability or versatility
If multiple illumination panels with different colors are used to create patterns, then the aesthetic value is improved, but the difficulty of maintaining color accuracy across all panels increases
Solution Approach 1:
The system applies different drive condition adjustments to different accent light panels based on their specific locations and the local reference luminance conditions. Each panel's compensation is tailored to its individual operating context, allowing the system to maintain color accuracy across diverse lighting patterns and configurations without requiring a single universal adjustment that would compromise any individual panel's performance
Data Source
AI summary
A method of generating drive conditions for light sources to maintain a desired color of a light emitted by the light sources, as perceived by a human observer, over a change in a reference luminance, includes determining a corrected color that produces perception of the desired color, by the human observer, in the presence of the reference luminance; and determining light source drive conditions to produce the corrected color. A light fixture includes multiple illumination panels and control electronics. Some of the illumination panels emit a reference luminance; others emit light of an accent color different from the reference luminance. The control electronics modify an intensity level of the reference luminance, and compensate drive conditions supplied to LED chips that emit the accent color, to compensate the accent color for effects of modifying the intensity level, on human perception of the accent color.