Vehicle Side Window Image Display for Rearward Confirmation
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Solution Overview
Problem
Conventional camera monitoring systems (CMS) for vehicles disrupt the driver's natural sight line movement, leading to increased risk of overlooking rearward or forward obstacles due to the separation of monitor and mirror views, and struggle with full-color moving image display on holographic panels, which is essential for urgent vehicle recognition.
Innovation Solution
An image display device that projects CMS images onto a semi-transmissive reflection plate on the side window, allowing direct frontward sight while providing rearward confirmation, using a micro projector and electrochromic reflectance control to maintain visibility and reduce eye fatigue, with adjustable brightness and contrast based on environmental conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a camera monitoring system with a monitor is used instead of door mirrors, then rearward confirmation capability is improved, but the driver's sight line movement for recognizing the vehicle surrounding area is increased
Solution Approach 1:
The patent combines the rearward confirmation function and forward sight function into a single door mirror structure. The mirror surface displays both the rearward camera monitor image and allows forward viewing through the gap between the mirror and front pillar, eliminating the need for separate sight line movements to different locations.
Solution Approach 2:
The patent utilizes the vertical dimension of the door mirror surface to display the rearward monitor image, while maintaining the horizontal gap for forward viewing. This dimensional arrangement allows both rearward and forward information to be accessible within the same visual field without requiring extensive sight line movement.
2Ease of operation
If a holographic panel is used for electronic side mirror display, then rearward image projection is achieved, but full-color moving image display performance is insufficient
Solution Approach 1:
The patent uses a conventional door mirror surface to copy and display the rearward camera image, rather than relying on holographic panels. This approach achieves full-color moving image display by projecting the camera output onto the mirror surface, maintaining color fidelity and motion clarity essential for urgent vehicle recognition.
3Reliability
If the monitor is positioned away from the door mirror gap, then rearward confirmation is provided, but frontward left and right view fields are compromised
Solution Approach 1:
The patent merges the rearward monitor display and forward viewing functions within the same door mirror structure. The monitor image is displayed on the mirror surface while the gap between the mirror and front pillar remains accessible for forward viewing, allowing both functions to coexist without spatial separation.
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
Enhances the driver's ability to recognize rearward and forward obstacles with minimal sight line movement, improving situational awareness and reducing the risk of accidents by integrating rearward and forward views within the same sight line, while maintaining efficient energy use and reducing eye fatigue.
Implementation Method 1
projects CMS images onto a semi-transmissive reflection plate on the side window
Implementation Method 2
electrochromic reflectance control to maintain visibility
Data Source
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AI summary
Provided is an image display device including: a display unit configured to display an image on a side window of a vehicle; and a control unit configured to control an opening and closing motion of the side window, according to a display state of the display unit.