Vehicle Door Display Projector with Curved Mirror
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Solution Overview
Problem
Conventional vehicle display devices fail to effectively project images onto vehicle door bodies, particularly in terms of image clarity and positional accuracy.
Innovation Solution
A display device comprising a projector and a holding unit positioned on the vehicle door body, with a reflection unit that includes a magnifying mirror or free curved surface mirror to correct distortion and project images onto a surface on the vehicle interior side, ensuring optimal image projection without obstruction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the projector is positioned to project an image directly onto the door body surface, then the image projection is simple, but the image clarity and positional accuracy deteriorate
Solution Approach 1:
A reflection unit (mirror) is introduced as an intermediary between the projector and the door body surface. The projector projects light onto the reflection unit, which then reflects the light onto the door body at the desired position and angle, achieving accurate image projection without requiring the projector to be positioned precisely on the door body surface.
Solution Approach 2:
The reflection unit enables image projection by changing the dimensional relationship between the projector and the target surface. Instead of direct linear projection, the light path is redirected through a different spatial dimension via reflection, allowing flexible positioning of the projector while maintaining projection accuracy.
2Illumination intensity
If a magnifying mirror is used to enlarge the image, then the image visibility is improved, but the device complexity increases
Solution Approach 1:
The reflection unit utilizes optical parameter changes through magnification. By employing a magnifying mirror with specific curvature and focal properties, the image size and brightness are enhanced while maintaining a relatively simple single-component structure rather than requiring multiple optical elements.
3Volume of stationary object
If the projector is positioned close to the door body surface, then the interior space is maximized, but image projection stability during vehicle vibrations deteriorates
Solution Approach 1:
The reflection unit acts as a mediator that decouples the projector positioning from the door body surface. This allows the projector to be positioned in a stable location away from vibration-prone areas while still achieving accurate image projection onto the door body through the reflection path, maintaining both space efficiency and projection stability during vehicle vibrations.
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 solution enables clear and stable image projection onto the vehicle door body, improving visibility and reducing the likelihood of image shifting during vehicle vibrations, while maintaining a comfortable interior space.
Implementation Method 1
the reflection unit includes a magnifying mirror configured to enlarge and reflect the image represented by the projection light
Implementation Method 2
the reflection unit includes a free curved surface mirror configured to correct distortion of the image represented by the projection light and reflect the image
Data Source
AI summary
A display device and a vehicle door include a projection surface provided on a surface on a vehicle interior side of a door body provided at a vehicle, a projector configured to project an image, and a holding unit configured to hold the projector at the door body, in such a positional relationship that the image from the projector is projected on the projection surface. Thus, the display device and the vehicle door can effectively project an image appropriately on the vehicle door body.