Rotating Concave Reflector Lighting Device for Pattern Formation
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Solution Overview
Problem
Existing vehicle lighting devices that form patterns on road surfaces require a large number of parts, which increases complexity and cost.
Innovation Solution
A lighting device comprising a light source, a concave-shaped reflector, and an actuator controlled by a controller to rotate the reflector, where the light source is kept on for a duration shorter than the rotation period, allowing the casting direction of light to be inclined relative to the rotation axis, thereby forming patterns using a minimal number of parts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional lighting devices use multiple parts to form patterns on road surfaces, then pattern formation capability is improved, but device complexity increases
Solution Approach 1:
The reflector serves multiple functions: it reflects light to form patterns, rotates to create different pattern positions, and its curved surface shape controls light distribution. This multi-functionality allows a single component to replace what would traditionally require multiple separate parts, reducing device complexity while maintaining pattern formation capability
Solution Approach 2:
The reflector is designed to rotate around the light source, transforming a static lighting system into a dynamic one. This rotation enables the single reflector to cover multiple pattern positions and orientations that would otherwise require multiple fixed lighting units, thereby reducing the number of parts needed
2Duration of action of stationary object
If the light source remains on continuously during reflector rotation, then continuous illumination is achieved, but energy consumption increases
Solution Approach 1:
The light source operates periodically rather than continuously, being activated only during specific phases of the reflector's rotation cycle. This periodic operation maintains the appearance of continuous illumination through the persistence of vision effect while significantly reducing energy consumption by keeping the light source off during portions of the rotation period
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 solution enables the formation of patterns on a surface using a reduced number of components, enhancing efficiency and simplifying the design while maintaining effective light casting capabilities.
Implementation Method 1
The reflector has a first reflection surface that is curved in a concave shape and is configured to receive light emitted from the light source
Data Source
AI summary
An lighting device 100 includes a light source, a reflector, an actuator, and a controller. The reflector has a first reflection surface that is concave recessed toward a direction away from the light source and is configured to receive light emitted from the light source. The actuator is configured to rotate the reflector with an axis passing through the light source being a rotation axis. The controller is configured to keep the light source on over a time shorter than a rotation period of the reflector according to a rotation angle of the reflector while controlling the actuator to rotate the reflector. A casting direction of light emitted from the first reflection surface is inclined with respect to an extension direction of the rotation axis.