Road Surface Light Projection for Vehicle Turn Visibility
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing vehicle drawing devices struggle to provide high visibility and alerting functions, especially in low-light conditions such as immediately before sunset, making it difficult for pedestrians and other vehicles to recognize the vehicle's presence and direction.
Innovation Solution
A vehicle drawing device that uses amber-colored light to draw signs on the road surface with a luminance contrast of 0.2 or more, synchronized with the turn signal lamp, and with a maximum luminous intensity three times that of the turn signal lamp, to enhance visibility and alerting functions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the luminance contrast is increased to improve visibility, then the alerting function is improved, but the power consumption increases
Solution Approach 1:
The patent applies parameter changes by carefully controlling the luminance contrast within a specific range (0.2 or more but less than 1.0) to achieve optimal visibility while managing power consumption. This quantitative parameter optimization resolves the contradiction between improving alerting function and reducing energy use.
Solution Approach 2:
The patent uses partial action by setting the luminance contrast to meet the minimum threshold (0.2 or more) required for effective visibility rather than maximizing it completely. This approach achieves sufficient alerting function while avoiding excessive power consumption that would result from higher contrast levels.
2Illumination intensity
If the maximum luminous intensity is increased to improve visibility, then the luminance contrast increases, but the amount of light irradiated increases
Solution Approach 1:
The patent optimizes the maximum luminous intensity parameter to be three times or more of the turn signal lamp's intensity, achieving sufficient luminance contrast without excessive light irradiation. This precise parameter control resolves the contradiction between visibility improvement and light quantity management.
3Reliability
If the luminance contrast is set to 0.2 or more to ensure visibility in low-light conditions, then the alerting function is improved, but the light irradiation increases
Solution Approach 1:
The patent sets the luminance contrast to meet the minimum threshold of 0.2 or more specifically for low-light conditions (immediately before sunset with background luminance of approximately 800 lux), achieving reliable visibility without unnecessary excess light irradiation. This targeted parameter optimization resolves the contradiction between reliability and resource consumption.
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
The device improves visibility and alerting functions by increasing luminance contrast, ensuring passengers and pedestrians can easily recognize the vehicle's presence and direction, even in low-light conditions, while reducing power consumption.
Implementation Method 1
a vehicle drawing device that draws a sign on a road surface with amber-colored light
Data Source
AI summary
A vehicle drawing device draws a figure on a road surface with a light. When a luminance of the figure is assumed as a road surface drawing luminance, and a luminance in a surrounding environment of a driving vehicle is assumed as a background luminance, the light is irradiated such that a luminance contrast calculated by the road surface drawing luminance and the background luminance is 0.2 or more, and an angle formed by an inclination direction at a tip end of the figure with respect to a light irradiation direction is less than 120 degrees.