Dynamic Color Transition Controller Avoiding White
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Solution Overview
Problem
Conventional light control systems for changing colors often result in undesirable intermediate colors, such as white, which are not pleasing to users, during transitions from one color to another.
Innovation Solution
A lighting system with a controller that dynamically changes the color from an initial to a final color through multiple phases, specifically by maintaining constant hue in the first phase, changing saturation to a minimum value, then adjusting hue in the second phase, and finally increasing saturation to the final value, thereby avoiding undesirable colors like white.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If linear interpolation method is used to change colors from one color to another, then the color transition is simple and direct, but undesirable intermediate colors (such as white, magenta, green) appear during the transition
Solution Approach 1:
The color transition is divided into multiple phases: first phase changes saturation to minimum while maintaining initial hue, second phase changes hue to final hue while maintaining minimum saturation, third phase increases saturation to final saturation while maintaining final hue. This segmentation avoids undesirable intermediate colors by controlling the transition path through hue-saturation space.
Solution Approach 2:
The patent transitions from direct RGB linear interpolation to operating in hue-saturation space. By converting colors to HSV/HSB representation and manipulating hue and saturation independently, the patent creates a different dimensional path that avoids unpleasant intermediate colors like white, magenta, and green that appear in direct RGB interpolation.
2Ease of operation
If white color is used as an in-between transition color, then the color change is smooth and neutral, but white is not perceived as a color and is disliked by users
Solution Approach 1:
Instead of using white as an intermediary transition color, the patent uses minimum saturation (near-black) as the intermediary state. This mediator allows smooth color transition while avoiding the disliked white color. The minimum saturation acts as a bridge that connects initial and final colors without passing through unpleasant intermediate hues at full saturation.
3Productivity
If edge of color gamut is used for color changing, then the color change is dramatic and noticeable, but users do not prefer or dislike certain colors making the transition unpleasant
Solution Approach 1:
The patent dynamically adjusts the color transition path based on the relationship between initial and final colors. When colors are far apart in hue, the system uses minimum saturation as an intermediary to create a two-step transition. When colors are close, direct interpolation is used. This dynamic adaptation ensures pleasant transitions regardless of the specific color pair.
Data Source
AI summary
A lighting system (900) has a light source (920) configured to provide a light, and a controller (930) configured to control hue and saturation of the light to change a color of the light from an initial color to a final color during at least two phases.