Vehicle Head-Up Display for Traffic Signal Change Visualization
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Solution Overview
Problem
Current head-up display systems in vehicles do not effectively inform drivers about upcoming traffic signal changes, which can lead to inefficient driving, increased vehicle wear, and traffic congestion.
Innovation Solution
A head-up display system that includes a communication module to receive traffic signal change periods, a distance module to calculate the vehicle's position relative to the signal changes, and a light source to project virtual indicators on the windshield, displaying the location and color of upcoming traffic signal changes based on the vehicle's speed and the signal states.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If traditional infotainment displays are used to show traffic signal information, then drivers can access traffic signal data, but drivers must take their eyes off the road to view the display
Solution Approach 1:
The patent projects traffic signal information from a traditional 2D infotainment screen onto the 3D windshield surface, creating a heads-up display that overlays digital information onto the driver's existing field of view. This dimensional transition allows traffic signal change location and timing data to be displayed without requiring driver attention to shift from the road.
Solution Approach 2:
The windshield serves as an intermediary medium between the traffic signal information system and the driver. By projecting information onto the windshield glass, the system creates a transparent display layer that mediates information delivery while maintaining the driver's primary visual connection to the road environment.
2Productivity
If drivers manually monitor traffic signals and adjust speed, then drivers maintain control, but driving efficiency decreases due to reactive rather than proactive speed management
Solution Approach 1:
The system performs preliminary action by calculating and displaying the location where traffic signals will change before the driver would naturally observe or react to the change. By showing the future signal state and its location ahead of time, the system enables proactive speed adjustment, allowing drivers to optimize their approach speed to reach the intersection at the optimal moment.
Solution Approach 2:
The system provides beforehand cushioning by giving drivers advance warning of upcoming signal changes, creating a temporal buffer that allows smooth, planned deceleration or acceleration rather than abrupt reactive maneuvers. This cushioning effect reduces stress on the vehicle and enables more efficient energy management.
3Productivity
If frequent braking and acceleration occur to adapt to traffic signals, then vehicles can maintain smooth operation, but vehicle wear increases
Solution Approach 1:
By displaying information about upcoming signal changes before the vehicle reaches the intersection, the system enables drivers to plan their speed trajectory in advance. This allows for gentle, progressive speed adjustments rather than frequent emergency braking or last-minute acceleration, significantly reducing mechanical stress on brake systems, engines, and transmission components.
4Ease of operation
If drivers react to traffic signals at the moment of change, then simple control is maintained, but traffic congestion increases due to synchronized stopping waves
Solution Approach 1:
The system maintains control simplicity while improving traffic flow by providing preliminary information about signal changes. Drivers receive advance notice of where and when signals will change, enabling them to adjust their following distance and speed proactively. This prevents the domino effect of simultaneous braking that occurs when all drivers react at the same moment, thereby maintaining simple reactive control while achieving smoother traffic flow.
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
This solution enhances driver awareness of traffic signal changes, allowing for better timing of braking, acceleration, and speed adjustments, thereby improving vehicle efficiency, reducing wear, and minimizing congestion.
Implementation Method 1
a light source configured to, via a windshield of the vehicle, generate a virtual display that is visible within a passenger cabin of the vehicle
Data Source
AI summary
A head up display system of a vehicle includes: a communication module configured to receive a period until a traffic signal of an intersection of roads will change from a first state to a second state; a distance module configured to, based on the period and a present speed of the vehicle, determine a distance in front of the vehicle where the vehicle will be when the traffic signal transitions from the first state to the second state; a light source configured to, via a windshield of the vehicle, generate a virtual display that is visible within a passenger cabin of the vehicle; and a display control module configured to, based on the distance, control the light source to include, in the virtual display, a visual indicator of a location in a path of the vehicle where the traffic signal will transition from the first state to the second state.