Vehicle HUD Shielding Detection and Notification Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In construction machines and other vehicles, the movement of the operator's line of sight and the wide range of the operation target cause image light from head-up displays (HUDs) to be frequently shielded by the operator's body, making it difficult to recognize essential information, especially in bright environments or when concentrating on driving.
Innovation Solution
A projection type display device comprising a spatial light modulation unit, a detection unit to identify when image light is shielded by the operator's body, and a control unit that performs notification processes to alert the operator of the shielded areas, using visual and auditory cues to ensure information visibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If image light is projected over a wide range of the windshield to ensure visibility, then the coverage area is improved, but the likelihood of image light being shielded by the operator's body increases
Solution Approach 1:
The detection unit performs preliminary detection of shielded areas before the operator can notice the missing information. The system proactively identifies when the operator's body is blocking projected information and triggers notification before the operator fails to obtain critical data.
Solution Approach 2:
A detection unit is introduced as an intermediary between the projection system and the operator. This intermediary detects shielded areas and communicates this information to the notification unit, which then alerts the operator about blocked information without requiring the operator to notice the absence of projected content.
2Productivity
If the operator concentrates on driving or operating the vehicle, then the operational focus is improved, but the ability to notice shielded image light decreases
Solution Approach 1:
The system establishes a feedback loop where the detection unit continuously monitors for shielded areas and provides real-time feedback to the notification unit. When shielding is detected, the notification unit immediately alerts the operator through sound or visual cues, creating a closed-loop system that compensates for the operator's inability to self-detect blocked information during concentrated operation.
Solution Approach 2:
The system replaces the operator's mechanical visual detection capability with an automated optical detection unit. Instead of relying on the operator's eyes and attention to notice missing projected information, an automated sensor system detects shielded areas and triggers notifications, substituting human detection with machine detection.
3Illumination intensity
If the surroundings are bright, then the ambient visibility is improved, but the contrast of projected image light decreases making shielding harder to notice
Solution Approach 1:
The detection unit performs preliminary detection of shielded areas before the reduction in contrast makes the shielding noticeable to the operator. By detecting the presence of the operator's body blocking light paths through sensors rather than relying on visual contrast, the system identifies information loss before the operator can perceive it.
Solution Approach 2:
The detection unit serves as an intermediary that detects shielded areas through non-visual means (such as optical sensors detecting light blockage) and communicates this to the notification unit. This intermediary system bypasses the need for visual contrast that is degraded in bright environments, allowing detection of shielding regardless of ambient light conditions.
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 ensures that critical information is accurately and consistently presented to the operator, even when image light is shielded, by adjusting the projection and using notifications to draw attention to obscured areas, thereby enhancing operational safety and efficiency.
Implementation Method 1
a light modulation element that spatially modulates light emitted from a light source on the basis of image information
Data Source
AI summary
Provided are a projection type display device and a projection control method capable of accurately performing information presentation to an operator of a vehicle even in an image light shielded state where image light to be projected onto a projection surface is shielded by an object. An HUD 10 that is mounted in a construction machine 100 having a windshield 5 notifies, in a case where it is detected that image light to be projected onto the windshield 5 is in an image light shielded state where at least a part of the image light is shielded by an object, such as part of the body of an operator of a vehicle, the presence of the state.