Vehicle HUD Segmentation for Speed-Dependent Safety
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Solution Overview
Problem
Existing head-up display (HUD) systems for vehicles face challenges in maintaining driver safety during high-speed travel by narrowing the field of vision, as they either reduce the amount of information projected or increase the image size, which can lead to insufficient information transmission to the driver.
Innovation Solution
A projection-type display device that includes a light modulation unit, a projection unit, a first image information generation unit, and a second image information generation unit, controlled by a unit that adjusts the information amount based on traveling speed, switching between projecting reduced information on the windshield and additional information on a dashboard display to ensure safety and information sufficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the amount of information projected onto the windshield is reduced during high-speed traveling, then driver safety is improved by narrowing the field of vision, but the information transmission to the driver becomes insufficient
Solution Approach 1:
The display information is segmented into two parts: essential safety-critical information is projected onto the windshield with reduced amount, while additional information is displayed on the dashboard display device. This segmentation allows the system to maintain safety by limiting windshield projections while preserving comprehensive information transmission through the dashboard.
Solution Approach 2:
The dashboard display device acts as an intermediary to handle information that is not critical for immediate safety. By transferring non-essential information to the dashboard, the system reduces the information load on the windshield projection, thereby improving safety while maintaining overall information availability through the combined display system.
2Illumination intensity
If the size of the projected image is increased during high-speed traveling, then visibility of the projected information is improved, but the field of vision is further narrowed
Solution Approach 1:
The system segments the display function between windshield projection and dashboard display. The windshield projection maintains appropriate size to avoid excessive field of vision narrowing, while the dashboard display handles additional information needs, preventing the need to increase windshield projection size at the expense of driver's field of vision.
Solution Approach 2:
The system transitions from a single-dimension display (windshield only) to a two-dimension display system by adding the dashboard display device. This dimensional expansion allows information to be distributed across different display planes, enabling visibility maintenance without compromising the driver's field of vision through excessive windshield projection enlargement.
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 system effectively secures driver safety by reducing the information amount on the windshield during high-speed travel while providing sufficient information on the dashboard, thereby maintaining visibility and information transmission.
Implementation Method 1
a light modulation unit (44) that modulates light emitted from a light source unit (40A) in accordance with input image information
Implementation Method 2
a projection unit (46) that projects the light modulated by the light modulation unit (44) onto a windshield (1)
Data Source
AI summary
Provided are a projection-type display device, a safe-driving support method, and a non-transitory computer readable recording medium storing a safe-driving support program capable of securing safety while providing sufficient information to a driver even in a situation where a field of vision in a traveling direction of a motor vehicle is poor. An HUD includes a light modulation unit that modulates light emitted from a light source unit; a projection unit that projects the light modulated by the light modulation unit onto a combiner; a first image information generation unit that generates first image information and outputs the first image information to the light modulation unit; a second image information generation unit that generates second image information and outputs the second image information to a display device; and a control unit that controls operations of the first image information generation unit and the second image information generation unit.