Electronic Mirror Light Control Filter Visibility
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Solution Overview
Problem
Conventional electronic mirror devices provide low visibility for drivers when using either the camera image display or the reflection surface, as the half mirror offers limited reflection and image display visibility compared to direct viewing.
Innovation Solution
An electronic mirror device with a light control filter that switches between light reflecting and transmitting modes based on electricity supply, combined with a controller to manage the image display unit and light control filter, enhancing visibility by adjusting reflectance and transmittance for improved rear-view confirmation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a half mirror is used to display camera images, then the device can show rear-view images, but the visibility is low compared to direct viewing
Solution Approach 1:
The patent applies a light control filter that can dynamically switch between different optical states (reflecting mode and transmitting mode) based on electrical control. This dynamic capability allows the system to adapt its optical properties to different operating conditions, resolving the contradiction by providing high visibility in both mirror and display modes without requiring complex mechanical adjustments
Solution Approach 2:
The light control filter changes its optical parameters (reflectance and transmittance) based on electrical signals. By controlling the reflectance to be 5% or more and transmittance to be 80% or more in different modes, the system achieves high visibility in both operating states while maintaining a relatively simple device structure
2Illumination intensity
If a light control filter is added to improve visibility, then visibility in both mirror and display modes improves, but device complexity increases
Solution Approach 1:
The light control filter serves multiple functions: it acts as a reflective surface for mirror mode, a transmissive element for display mode, and provides glare reduction. By integrating these multiple functions into a single component controlled by a simple controller, the system achieves high visibility without proportionally increasing device complexity
Solution Approach 2:
The light control filter acts as an intermediary element between the camera/image display unit and the driver. It mediates the light transmission and reflection to optimize visibility while the controller manages its operation, distributing the complexity across manageable components
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 device improves visibility by offering higher reflectance in mirror mode and higher transmittance in image display mode, reducing glare and enhancing clarity for the driver, while maintaining better visibility than conventional half mirrors.
Implementation Method 1
The light control filter can switch between at least two modes including a light reflecting mode and a light transmitting mode based on supply of electricity
Data Source
AI summary
The electronic mirror device includes a display and a controller. The display includes a body case, an image display unit, and a light control filter, and is mounted on an installation position of a rear-view mirror in an interior of a vehicle for displaying an image captured by a camera mounted to the vehicle. The body case has an opening, and the image display unit is mounted to the opening of the body case. The light control filter is disposed to face a display surface of the image display unit. The light control filter can switch between at least two modes including a light reflecting mode and a light transmitting mode based on supply of electricity. The controller controls the image display unit and the light control filter.