Vehicle Image Projection Using 1.4 μm Light for Road Sensing
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Solution Overview
Problem
Conventional image projection apparatuses for vehicles are not effectively utilizing their projector functions, particularly in detecting road surface conditions under sunlight, as they struggle to accurately acquire necessary road surface images.
Innovation Solution
An image projection apparatus that utilizes a projector attached to a vehicle, employing an acquisition unit, an image projection unit, and imaging means to project light in a wavelength band centered on 1.4 μm, allowing for the detection of road surface conditions and hidden vehicles by imaging the projected light, which is not affected by sunlight.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If conventional projectors are used to display information on road surface, then portability and ease of operation are improved, but measurement precision and reliability deteriorate under sunlight conditions
Solution Approach 1:
The patent changes the wavelength parameter of the light source to 1.4μm infrared band, which is not affected by sunlight. This parameter change allows the imaging means to accurately detect road surface conditions and hidden vehicles even under strong sunlight conditions, resolving the contradiction between ease of operation and measurement precision.
2Adaptability or versatility
If conventional projectors display information on road surface, then adaptability is improved, but measurement precision deteriorates due to sunlight interference
Solution Approach 1:
By changing the light wavelength parameter to 1.4μm infrared, the system maintains adaptability to various road conditions while eliminating sunlight interference. The imaging means can now accurately measure road surface conditions across different environmental conditions, simultaneously achieving adaptability and measurement precision.
3Productivity
If projector functions are expanded for road surface imaging, then productivity is improved, but device complexity increases
Solution Approach 1:
The patent makes the projection apparatus multi-functional by enabling it to both display information and perform road surface condition detection using the same 1.4μm light source and imaging means. This universality increases productivity by combining multiple functions in one device while minimizing the increase in device complexity.
4Ease of operation
If imaging is performed in visible light band, then ease of operation is improved, but measurement precision deteriorates under sunlight
Solution Approach 1:
The patent changes the operating wavelength parameter from visible light to 1.4μm infrared band. This parameter change allows the imaging means to operate easily while achieving high measurement precision by detecting infrared radiation that is not overwhelmed by sunlight, resolving the contradiction between ease of operation and measurement precision.
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
Enables effective utilization of the projector's functions for acquiring road surface condition information and detecting hidden vehicles, providing accurate data for safer vehicle operation and improved road surface awareness.
Implementation Method 1
the image projection unit projects light in a wavelength band centered on a wavelength of 1.4 μm and the imaging means images an image projected based on the light in the wavelength band centered on the wavelength of 1.4 μm
Data Source
AI summary
An image projection apparatus that can be attached to a vehicle and can be effectively utilized for acquisition of road surface condition information, detection of a hidden vehicle, and the like is provided. The image projection apparatus that projects an image includes: an acquisition unit that acquires information related to a vehicle; an image projection unit that projects an image based on the information acquired by the acquisition unit; and imaging means that acquires an image outside the vehicle, the image projection unit projects light in a wavelength band centered on a wavelength of 1.4 μm and the imaging means provides the information related to the vehicle by imaging an image projected based on the light in the wavelength band centered on the wavelength of 1.4 μm.