Vehicle Door Window Glass Fluorescent Light Emission
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Solution Overview
Problem
Existing vehicle door light emission devices are not practical for notifying pedestrians and drivers of the opening of side doors, especially for sashless doors, as they require separate attachments and are difficult to recognize from the backside.
Innovation Solution
A light emission device integrated into the vehicle door's window glass that emits visible light through incident excitation radiation, using a multilayer structure with a transparent plate and a resin film containing a fluorescent material, allowing the glass to illuminate based on the door's opening state without external attachments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If a light emission device is attached to the outside of the door as a separate part, then the door opening can be notified to the outside of the vehicle, but it requires additional external components and is not practical
Solution Approach 1:
The light emission device is merged with the window glass by integrating the fluorescent material directly into the glass structure. The window glass serves dual functions: as a structural component of the door and as a light emission element. This eliminates the need for separate attachment structures while maintaining the notification function.
Solution Approach 2:
The window glass is given multiple functions: it serves as both the structural window component and the light emission device. By incorporating fluorescent material into the glass, the same component performs both protective/transparent functions and light emission notification functions, reducing overall system complexity.
2Loss of information
If a light emission device is attached to the outside of the door body, then light can be emitted to notify of door opening, but it is difficult to recognize the emission from the back side
Solution Approach 1:
The light emission is transitioned from an external attachment to an integrated component within the window glass itself. By placing the fluorescent material within the glass matrix, light can be emitted from the glass structure that is visible from multiple angles including the back side, improving recognition without requiring external positioning.
3Illumination intensity
If the window glass contains a fluorescent material, then the glass can emit visible light through incident excitation light, but the glass structure becomes more complex
Solution Approach 1:
The window glass is created as a composite material combining glass matrix with fluorescent material particles or compounds embedded within it. This composite structure allows the glass to maintain its structural properties while gaining light emission capabilities through the fluorescent component that converts excitation light to visible light.
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
Enables easy recognition of the opening and closing of vehicle doors by pedestrians and drivers without additional external components, enhancing safety by preventing accidents through effective notification of the door's status.
Implementation Method 1
a resin film comprising a resin and a fluorescent material capable of emitting visible light through incident radiation of excitation light
Data Source
AI summary
A light emission device 20 comprises a light source 21 irradiating excitation light; and a window glass 13 emitting visible light through incident radiation of the excitation light, which is attached to a car door 10, wherein the window glass 13 emits the light by irradiation with the excitation light depending on an opening/closing state of the car door 10. The present invention can provide a light emission device that enables the opening and closing of a vehicle door to be easily recognized by a person in the back, without attaching any separate part to an outer side of the vehicle door or the like.