Multi-Sensor Light Detection Layout for Low-Interference Sensing
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Solution Overview
Problem
Existing vehicle systems lack an efficient and cost-effective method to integrate multiple light detection sensors, such as solar radiation, illuminance, and rain sensors, while minimizing interference and optimizing detection accuracy and manufacturing costs.
Innovation Solution
A light detection device with multiple sensors, including rain, illuminance, and solar radiation sensors, integrated on a single substrate, utilizing a light transmitting body and shielding body to optimize sensor placement and reduce interference, allowing for efficient light collection and detection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If multiple sensors are placed at different positions, then each sensor can detect light from its specific direction, but the device size and complexity increase
Solution Approach 1:
Multiple sensors (illuminance sensor, solar radiation sensor, rain sensor) that were previously placed at different positions are merged onto a single substrate. The substrate integrates all sensor components, allowing them to function together while reducing the overall number of substrates and simplifying the optical design.
Solution Approach 2:
The patent uses a light shielding body with specific three-dimensional positioning to control light paths. By strategically placing opening portions in the light shielding body at different heights and positions, light from different directions can reach different sensors on the same substrate, effectively using spatial dimensionality to differentiate detection angles without requiring separate substrate placements.
2Reliability
If multiple substrates are used for different sensors, then each sensor can be optimized for its function, but manufacturing costs and assembly complexity increase
Solution Approach 1:
The patent combines multiple sensor types (illuminance sensor, solar radiation sensor, rain sensor) onto a single substrate, eliminating the need for multiple separate substrates. This integration reduces manufacturing steps, lowers material costs, and simplifies the assembly process while maintaining the functional optimization of each sensor type through careful positioning and light path control.
3Volume of moving object
If sensors are placed close together on the same substrate, then device size is reduced, but interference between sensors increases
Solution Approach 1:
The patent extracts and removes interfering light paths by introducing a light shielding body with strategically positioned opening portions. The shielding body blocks stray light from reaching unintended sensors, effectively eliminating cross-interference between the illuminance sensor, solar radiation sensor, and rain sensor while allowing them to be closely positioned on the same substrate.
Solution Approach 2:
The light shielding body acts as an intermediary element between the light sources and the sensors. By positioning opening portions in the shielding body at specific locations, it selectively guides light from different directions to the appropriate sensors, preventing direct interference between sensors while maintaining their close proximity on the substrate.
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 integrated sensor system enhances detection accuracy, reduces manufacturing costs, and minimizes interference among sensors, facilitating downsizing and optimizing optical design.
Implementation Method 1
a light transmitting body made of a light transmitting resin and configured to cover the substrate and the plurality of sensors
Implementation Method 2
a light shielding body configured to cover a periphery of the light transmitting body with a shape that shields the periphery of the light transmitting body from light
Data Source
AI summary
A light detection device, includes: a substrate; sensors provided on the substrate; a light transmitting body made of a light transmitting resin and covering the substrate and the sensors; and a light shielding body covering a periphery of the light transmitting body with a shape that shields light and including an opening facing the substrate, wherein the sensors are on a substrate surface at positions to receive light entering the light transmitting body from outside the light shielding body through the opening, and the sensors include at least two sensors among: a first illuminance sensor detecting illuminance according to light received from a certain direction at the substrate surface; a second illuminance sensor detecting illuminance according to light received from a wider direction than the first illuminance sensor; a solar radiation sensor detecting solar radiation according to received light; and a rain sensor detecting rain according to received light.