Vehicle Interior Lighting Control Circuit Simplification
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Solution Overview
Problem
Vehicle interior lighting systems with multi-color LEDs face complexity and high costs due to the need for individual control of numerous components, complicating light emission control and increasing costs.
Innovation Solution
A vehicle interior lighting apparatus using a controller to simultaneously control the on/off operations and luminance levels of two primary colors across all light source units, while individually controlling the remaining color, reducing the number of components and simplifying control, and utilizing light guide members to achieve gradation effects.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If light sources emitting various colors are controlled individually to enhance decorative effect, then the decorative effect is improved, but the number of components in the control circuit increases and the control becomes complicated
Solution Approach 1:
The patent merges the control of multiple light sources into a single control circuit. The control unit simultaneously controls multiple light sources emitting different colors (red, green, blue) to produce gradation effects, eliminating the need for separate control circuits for each light source while maintaining decorative lighting effects.
Solution Approach 2:
The single control unit performs multiple functions by controlling different combinations of light sources to achieve various lighting effects including gradation, color changing, and simultaneous multi-color emission, replacing what would otherwise require multiple specialized control circuits.
2Ease of operation
If light sources are controlled individually with separate control circuits, then precise control is achieved, but the cost increases due to more components
Solution Approach 1:
Multiple control functions are merged into a single control unit that can independently regulate the intensity and timing of each light source type (red, green, blue LEDs) while maintaining precise control over the overall lighting output, thereby reducing component quantity without sacrificing control precision.
3Device complexity
If multiple light sources are controlled simultaneously, then system simplicity is improved, but the ability to achieve individual color gradation is reduced
Solution Approach 1:
The control unit dynamically adjusts the intensity and timing of different light sources based on predetermined control signals. By varying the emission intensity of red, green, and blue light sources at different rates and patterns, the system achieves color gradation effects while maintaining a simple unified control structure.
Solution Approach 2:
The control unit employs periodic variation in light source activation and intensity adjustment to create gradation effects. Different light sources are activated in sequences or with varying duty cycles, producing the appearance of smooth color transitions while using a single control circuit.
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
This approach simplifies light emission control, reduces costs, and achieves a high decorative effect through gradation lighting while minimizing hue variations, by controlling two primary colors simultaneously and one color individually, and using rod-shaped light guide members for effective illumination.
Implementation Method 1
a light guide member for guiding light coming from the light source
Data Source
AI summary
A vehicle interior lighting apparatus for illuminating the interior of a vehicle, being equipped with a plurality of light source units each having a light source emitting the three primary colors of light and a control connector for simultaneously controlling the on/off operations and the luminance levels of predetermined two colors in all the light source units and for individually controlling the on/off operation and the luminance level of one color other than the predetermined two colors in each of the light source units.