IR-Transparent Glass Trim for Concealed Automotive LiDAR
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Solution Overview
Problem
Current LiDAR sensors in autonomous cars are unaesthetic and space-consuming, and existing solutions do not allow IR signals to effectively pass through car bodies or glass parts, limiting their integration and functionality.
Innovation Solution
Integration of infrared-based remote sensing LiDAR sensors within a glass trim element with a low absorption coefficient in the 750-1650 nm wavelength range, enabling IR signal transmission and 3D mapping capabilities while maintaining a minimal design change and higher safety.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If LiDAR sensors are placed on the car body (mushroom shape), then autonomous navigation capability is achieved, but aesthetic appearance deteriorates and space consumption increases
Solution Approach 1:
The patent combines the LiDAR sensor with the glass trim element, merging the sensing function into an existing aesthetic component. The sensor is integrated behind the glass surface, allowing the glass to serve both as a decorative trim piece and as a housing for the LiDAR sensor, thus eliminating the need for separate mushroom-shaped sensors.
Solution Approach 2:
The LiDAR sensor is nested within the glass trim element structure. The sensor is positioned behind the glass surface, with the glass acting as a cover that encloses the sensor while maintaining the overall aesthetic shape. This nesting approach allows the sensor to be hidden within the trim element rather than protruding outward.
2Device complexity
If LiDAR sensors are embedded into bumpers or headlights, then integration is improved, but exposure to damage and climatic conditions increases
Solution Approach 1:
The patent uses a glass trim element as a protective shell covering the LiDAR sensor. The glass provides a rigid, protective enclosure that shields the sensor from physical damage and climatic factors while allowing optical signals to pass through. The glass acts as a protective film or shell that maintains sensor functionality while providing environmental protection.
3Shape
If glass trim elements are used, then aesthetic appearance and functionality are improved, but IR signal transmission through existing glass is insufficient
Solution Approach 1:
The patent modifies the optical parameters of the glass by selecting specific glass compositions and coatings that have high transmission properties in the infrared wavelength range (750-1650 nm). The glass is engineered with specific absorption coefficients to ensure adequate IR signal transmission while maintaining aesthetic appearance in the visible range.
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 precise surrounding mapping for autonomous vehicle navigation, preventing obstacles, and concealing unsightly sensors while maintaining performance and aesthetics.
Implementation Method 1
a glass sheet having an absorption coefficient comprised between 5 m−1 and 15 m−1 in the wavelength range from 750 to 1650 nm
Implementation Method 2
having an absorption coefficient comprised between 5 m−1 and 15 m−1 in the wavelength range from 750 to 1650 nm
Implementation Method 3
LiDAR (acronym of Light Detection And Ranging)... emitting light pulses which reflect off objects
Implementation Method 4
LiDAR sensors are new generation LIDAR based on scanning, rotating, flashing or solid state LiDARs... illuminating a target with a laser light
Data Source
AI summary
A trim element for a motor vehicle that includes at least one glass sheet having an absorption coefficient comprised between 5 m−1 and 15 m−1 in the wavelength range from 750 to 1650 nm and having an external and an internal faces. An infrared-based remote sensing device in the wavelength range from 750 to 1650 nm is placed behind the internal face of the glass sheet.