Windshield Display Cover Detection for Recessed Dashboard Surfaces
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Solution Overview
Problem
Reflection display systems in vehicles, such as PHUD, face challenges in detecting foreign objects on the display surface, which can conceal safety-relevant information due to their arrangement in a depression on the dashboard, making it difficult to distinguish between non-display and obstruction, and are affected by ambient light reflections.
Innovation Solution
A reflection display system with a detection sensor system that includes light barrier, reflection light measurement, cover pane, touch, image acquisition, and ultrasonic sensors to detect foreign objects on the display surface, signaling disturbances to the control unit for warning or countermeasures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the display unit is arranged in a depression on the dashboard to prevent direct view and blinding, then user safety is improved, but foreign objects on the display surface become invisible and can conceal safety-relevant information
Solution Approach 1:
The patent introduces a detection sensor system as an intermediary device to detect foreign objects on the display surface. The sensor system includes light sources and sensors positioned to detect objects in the display area without requiring direct user visibility, thus resolving the contradiction between hiding the display from direct view and detecting foreign objects.
Solution Approach 2:
The patent replaces manual visual inspection with an automated optical detection system. Instead of relying on users to visually detect foreign objects (which is difficult due to the depressed arrangement), the system uses light sources, photodetectors, and evaluation units to automatically detect and signal foreign objects.
2Loss of information
If foreign objects rest on the display surface, then they conceal parts of the display including safety-relevant symbols, but the absence of these symbols is not noticed since they are not permanently displayed
Solution Approach 1:
The patent implements a feedback mechanism where the detection sensor system continuously monitors the display surface for foreign objects. When an object is detected, the system provides feedback by signaling the disturbance, alerting the user to the presence of a foreign object that may be concealing safety-relevant information.
Solution Approach 2:
The system performs preliminary detection of foreign objects before they can conceal critical display information. By continuously monitoring the display surface and signaling disturbances, the system alerts users in advance potential information concealment issues.
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 automated detection and signaling of foreign objects obstructing the display, ensuring visibility of safety-relevant information and reducing ambient light interference, thereby improving the reliability of the reflection display system.
Implementation Method 1
a detection sensor system which is designed to detect a foreign object present on the display surface
Implementation Method 2
designed to output the display image via a display surface of the display unit, wherein the display unit is in particular arranged in a depression on an upper side of a dashboard so that a reflection of the display image is perceptible via the windshield
Data Source
AI summary
A reflection display system for displaying a display image for a vehicle occupant of a motor vehicle by reflecting the display image on a windshield is provided. The system includes a display unit which is designed to display the display image via a display surface of the display unit, wherein the display unit is arranged on an upper face of a dashboard, in a recess, such that a reflection of the display image via the windshield can be perceived in the eye region of a vehicle occupant, a detection sensor system which is designed to detect a foreign object present on the display surface, and a control unit which is designed to signal a disruption of the display of the display image if the foreign object is detected on the display surface.