Rearview Mirror Glare Compensation via Local Transmittance Control
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Solution Overview
Problem
Rearview mirrors in vehicles experience glare issues due to strong sunlight or high beams from following vehicles, which can obstruct the driver's view and compromise traffic safety.
Innovation Solution
A display control method and system that detects glare on a semi-translucent polarizing film layer and generates a driving signal to display a non-black image in the glare compensation region, increasing light transmittance and reducing light reflectance to mitigate the glare intensity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a semi-translucent polarizing film layer is used on the rearview mirror to reflect light, then the driver can see the rear view clearly, but glare is created on the reflective film when strong light irradiates the surface, resulting in the driver being unable to see the road
Solution Approach 1:
The patent divides the rearview mirror into different functional regions: a first region with a semi-translucent polarizing film layer for normal reflection, and a second region (glare compensation region) with different optical properties. This local differentiation allows the mirror to maintain reflection in most areas while creating a specific zone that compensates for glare effects by having different light transmission characteristics.
Solution Approach 2:
The patent changes the optical parameters (transmittance and reflectance) of different regions of the rearview mirror. The glare compensation region is designed with specific transmittance and reflectance values that differ from the first region, allowing it to handle strong light differently and reduce glare intensity while maintaining overall visibility.
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
Effectively reduces glare intensity on the rearview mirror, enhancing visibility for the driver and improving traffic safety by increasing light transmittance and reducing light reflectance in the glare region.
Implementation Method 1
A surface of the rearview mirror is provided with a reflective film, which serves as a mirror reflection
Implementation Method 2
semi-translucent polarizing film layer
Implementation Method 3
detecting a photoelectric current created by ambient light irradiated onto the surface of the semi-translucent polarizing film layer
Data Source
AI summary
A display control device and a display system are provided. The display control method includes: detecting if a glare is presented on the surface of the semi-translucent polarizing film layer on the emergent light side of the display device; generating a driving signal for driving the display device to display a non-black image in a glare compensation region if a glare is detected to be presented on the surface of the semi-translucent polarizing film layer; in which the glare compensation region corresponds to a glare region in the semi-translucent polarizing film layer and the glare region is an region in which a glare is presented. The display control method of the present disclosure may reduce glare intensity when a glare is created on a mirror surface such as a rearview mirror.