Vehicle Display Optical Warning for Acoustic Failure
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Solution Overview
Problem
Existing motor vehicle display devices do not provide adequate optical confirmation when acoustic warnings fail, potentially leading drivers to rely solely on inaudible alerts and misjudge vehicle safety conditions.
Innovation Solution
The display device integrates an optical warning system that activates when an acoustic warning malfunction is detected, utilizing a coupling-out circuit, storage unit for audio signals, and dual computing units to ensure accurate output and functionality testing of the acoustic output, including inaudible test signals to avoid driver distraction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If acoustic warnings are used to alert drivers without requiring visual attention, then driver safety is improved by keeping eyes on the road, but reliability deteriorates when the acoustic warning system fails silently
Solution Approach 1:
The patent implements a feedback mechanism where the control unit continuously monitors the acoustic output signal and compares it against expected warning signals. When a discrepancy is detected, the system provides visual feedback through the display device to indicate acoustic warning failure, allowing drivers to understand the system status without requiring separate manual checks.
Solution Approach 2:
The patent transitions from a single-acoustic-dimension warning system to a multi-dimensional system by adding visual display as a secondary dimension. This allows the system to communicate both the primary acoustic warning and the secondary visual status indication, enabling drivers to perceive system state through multiple sensory channels simultaneously.
2Reliability
If acoustic warnings are provided for serious errors and dangers, then driver alertness is improved, but safety deteriorates when the acoustic warning fails and drivers incorrectly assume no danger exists
Solution Approach 1:
The patent prepares for potential acoustic warning failures by implementing a preemptive monitoring system. The control unit continuously checks the acoustic output functionality before and during warning operations, and has visual backup indicators ready to activate. This cushioning mechanism ensures that if acoustic warning fails, the visual display is already prepared to compensate, preventing driver misconception.
3Reliability
If the display device monitors acoustic output functionality, then reliability is improved by detecting failures, but device complexity increases due to additional monitoring circuits
Solution Approach 1:
The control unit serves multiple functions: it generates acoustic warning signals, monitors acoustic output functionality, compares signals, and controls visual display output. By making the control unit universal and multi-functional, the patent avoids adding separate dedicated monitoring circuits, thereby improving reliability while minimizing the increase in device complexity.
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
Enhances vehicle safety by ensuring drivers attend to optical warnings and the environment when acoustic alerts fail, reducing reliance on potentially inactive systems and improving the reliability of the acoustic warning system through efficient evaluation and testing mechanisms.
Implementation Method 1
a coupling-out circuit that rectifies the signal present at the loudspeaker and integrates it with a capacitor
Implementation Method 2
a coupling-out circuit that rectifies the signal present at the loudspeaker and integrates it with a capacitor
Data Source
AI summary
A display device for a motor vehicle includes: a display for displaying vehicle information; a computing device receiving vehicle data via a data bus, evaluating the received vehicle data, and causing an acoustic warning as a function of the evaluation of the vehicle data; and a connection between the display device and a loudspeaker for outputting of the acoustic warning, the connection to the loudspeaker being connected to an input of an evaluation device in such a way that, depending on a signal present at the connection of the loudspeaker, a malfunctioning or a functioning of the acoustic output is determined, and an optical warning display is provided for outputting an optical warning in the case of a malfunction of the acoustic output.