Vehicle HUD Motion Indicator for Pedestrian Guidance
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Solution Overview
Problem
Existing driving assistance systems using head-up displays (HUDs) can irritate drivers and fail to reliably guide their attention to pedestrians, especially when the vehicle turns, due to the abrupt on and off nature of indicators, which can cause discomfort and difficulty in recognizing pedestrians.
Innovation Solution
A driving assistance apparatus that uses an imaging device, electronic control unit, and head-up display to project a motion indicator that smoothly guides the driver's line of sight towards a pedestrian by calculating the vehicle's turning track and relative positional information, ensuring the indicator's tip approaches the pedestrian along a virtual straight line, reducing positional shift and discomfort.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the indicator is turned on and off to guide the driver's line of sight, then the driver can recognize the pedestrian's location, but the driver experiences strong eye irritation and discomfort
Solution Approach 1:
The indicator uses periodic blinking to attract driver attention and enable pedestrian recognition, but this periodic on/off action causes strong eye irritation and discomfort to the driver
Solution Approach 2:
The patent transitions from static on/off indicators to dynamic motion indicators that continuously move along a trajectory toward the pedestrian, eliminating the abrupt on/off transitions that cause eye irritation while maintaining effective line-of-sight guidance
2Object-affected harmful factors
If the motion indicator is displayed for a predetermined time to smoothly guide the driver's line of sight, then driver discomfort is reduced, but the vehicle's turning causes the indicator to point in the wrong direction by the time display ends
Solution Approach 1:
The system calculates the vehicle's turning trajectory in advance and uses this information to dynamically adjust the motion indicator's trajectory, ensuring the indicator continuously points toward the pedestrian's current position even as the vehicle turns, rather than maintaining a fixed display timeline
Solution Approach 2:
The motion indicator's position and direction are continuously adjusted based on real-time feedback from the vehicle's actual turning state and the pedestrian's relative position, ensuring the indicator remains accurate throughout the display period despite vehicle movement
Data Source
AI summary
A driving assistance apparatus for a vehicle includes an imaging device, an ECU, and a head-up display device. When a position in which a straight line connecting a predetermined position and a position of a particular object intersects with a position estimating plane that is a virtual plane position on the same plane as a virtual display area is defined as a particular object estimation position, an indicator is a motion indicator moving such that a tip end of the indicator approaches the estimation position along a virtual straight line set in the virtual display area with lapse of time, and the ECU is configured to perform control such that a position shift amount of the estimation position shifted from the virtual straight line in a width direction of a vehicle on the position estimating plane is equal to or less than a predetermined value in a predetermined pre-collision time.