In-Vehicle Illumination Device with Light Guide Plate
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Solution Overview
Problem
Existing in-vehicle illumination devices with integrated room lamps and vanity mirrors lack versatility and effective color rendering, often resulting in inadequate lighting for both general and specific use cases, and are not optimized for size reduction and design aesthetics.
Innovation Solution
An in-vehicle illumination device featuring a room lamp section with a light guide plate and multiple color LED light sources, allowing for two illumination modes (general room lamp and vanity mirror modes) with adjustable color rendering and illuminance, along with a map lamp section for focused lighting, all integrated with efficient heat management and compact design.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If a single light source is used for both room lamp and vanity mirror functions, then device size is reduced, but color rendering quality deteriorates
Solution Approach 1:
The illumination device is segmented into multiple independent light sources: a first light source (LED) for room lamp function and a second light source (halogen lamp) for vanity mirror function. Each light source can be controlled separately to optimize performance for its specific function, resolving the contradiction between size reduction and color rendering quality.
Solution Approach 2:
The illumination device achieves multi-functionality by integrating both room lamp and vanity mirror functions into a single ceiling-mounted unit. The device can operate in different modes (room lamp mode, vanity mirror mode, or both simultaneously) to serve multiple purposes while maintaining appropriate light quality for each function.
2Volume of moving object
If illumination device is made compact for ceiling mounting, then vehicle interior space is increased, but design complexity increases
Solution Approach 1:
The room lamp function and vanity mirror function are merged into a single integrated illumination device that mounts on the vehicle ceiling. This combination reduces the overall number of separate components needed while providing both functions through coordinated light sources and optical elements.
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 provides enhanced practicality and aesthetic appeal with improved color rendering and versatility, reducing size and heat generation while maximizing customer convenience and illumination effectiveness.
Implementation Method 1
a light guide plate that guides a light of the first light source section from an end surface thereof and emits the light from a front surface thereof
Data Source
AI summary
In an in-vehicle illumination device including: a room lamp section provided with a first light source section, and a light guide plate that guides a light of the first light source section from an end surface thereof and emits the light from a front surface thereof; a first switch for use by the room lamp section; and a vanity mirror section provided with a mirror, when the first light source section is turned on through operation of the first switch, a mode change is made to a room lamp illumination mode in which a first illumination light comes from the room lamp section, and also when the vanity mirror section is in use, the first light source section is turned on, and a mode change is made to a vanity mirror illumination mode in which a second illumination light comes from the room lamp section. The resulting in-vehicle illumination device can be excellent in practicality with the smaller size, and can achieve improvement in terms of design.