Blind Spot Mirror Light-Guiding Base Glare Reduction
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Solution Overview
Problem
Conventional vehicle blind spot detection systems emit dazzling point light sources at night, potentially causing driver distraction and accidents due to excessive glare.
Innovation Solution
A vehicle blind spot detection system featuring a rearview mirror with a light-guiding base and circuit board that refracts and diffuses light from emitters, reducing glare through indirect irradiation and uniform diffusion, and includes a second emitter for fill light to prevent dimness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a conventional LED light emitter is used to indicate blind spot detection, then the warning function is clear and visible, but the light causes excessive glare and dazzles the driver at night
Solution Approach 1:
The patent introduces a light-guiding base with light-guiding surfaces and a light-gathering room as an intermediary between the LED light emitter and the transmitting area. This intermediary structure refracts and diffuses the light, transforming the direct point light source into a distributed light pattern that reduces glare while maintaining visibility. The light-guiding base acts as a mediator that modifies the light's propagation path and distribution characteristics.
Solution Approach 2:
The patent changes the physical parameters of light propagation by using inclined light-guiding surfaces with specific angles and a curved light-emitting surface. These geometric parameters control the refraction and diffusion of light, transforming the light's intensity distribution from a concentrated point source to a dispersed pattern. The parameter changes in light direction, angle, and distribution achieve glare reduction while preserving the warning function.
2Object-affected harmful factors
If the light is diffused to reduce glare, then driver safety is improved, but the light intensity may become too dim to provide effective warning
Solution Approach 1:
The patent extends the light emission in multiple spatial dimensions by using inclined light-guiding surfaces at different angles and a curved light-emitting surface. This multi-dimensional light distribution spreads the light across a broader area and at various angles, reducing concentration in any single direction (thereby reducing glare) while maintaining overall visibility through distributed illumination in multiple dimensions.
Solution Approach 2:
The patent segments the light emission path into multiple functional zones within the light-guiding base, including inclined light-guiding surfaces, a light-gathering room, and a curved light-emitting surface. This segmentation allows different portions of the light to be directed and diffused in controlled ways, achieving both glare reduction through distribution and sufficient intensity through strategic light path design.
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
Significantly reduces glare at night, enhancing driver safety by providing a non-dazzling warning system that minimizes the risk of unexpected traffic accidents.
Implementation Method 1
the light from the first light emitter is configured to pass through and be refracted by the light-guiding surface
Implementation Method 2
the lights are diffused evenly through the curved light-emitting surface
Data Source
AI summary
A vehicle blind spot detection system may include a rearview mirror and an indicating unit. The rearview mirror has a shell and a mirror, and a transmitting area is formed on the mirror. The indicating unit installed in the shell is horizontally aligned with the transmitting area of the mirror. The indicating unit comprises a light-guiding base and a circuit board, and a front side of the light-guiding base has a recess to form a first housing, a light-gathering room, and a second housing therein. A first light emitter and a second light emitter are respectively mounted on the circuit board, and the circuit board has a through hole. When the circuit board is coupled on a rear side of the light-guiding base, the first light emitter and the second light emitter are respectively accommodated in the first housing and the second housing.