Head-Up Display Position Control for Moving Vehicles
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Solution Overview
Problem
High-speed movement of vehicles and other moving bodies leads to rapid changes in the display position of information providing images on head-up displays, reducing viewability due to increased focus adjustment time and potential fatigue for drivers, as well as increased risk of missing critical information.
Innovation Solution
An information providing apparatus with a display unit that adjusts the display position of information providing images to maintain a decreasing deviation from a straight line reaching position as the moving body approaches a predetermined location, allowing for a lower changing rate of the display position compared to the moving body's velocity, and ensuring continued visibility of information even at high speeds.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the display position of the information providing image follows the movement of the viewing position at the same rate, then the positional relationship between the object and the information providing image is maintained, but the changing rate of the display position becomes too high at high velocities, reducing viewability
Solution Approach 1:
The patent changes the parameter of display position changing rate relative to the moving body's velocity. Instead of maintaining a 1:1 correspondence between viewing position movement and display position change, the system adjusts the display position at a lower changing rate, thereby reducing focus adjustment requirements while still maintaining adequate positional relationship
Solution Approach 2:
The system dynamically adjusts the display position based on the moving body's velocity and the distance to the object. As the moving body approaches the object, the display position changing rate is increased to maintain accuracy, while at higher velocities or greater distances, the changing rate is reduced to improve viewability
2Measurement precision
If the display position changes rapidly to follow the viewing position movement, then the information providing image stays aligned with the object, but the focus adjustment time increases and driver fatigue increases
Solution Approach 1:
The patent modifies the parameter of display position changing rate to be lower than the viewing position changing rate. This reduction in changing rate directly decreases the focus adjustment time required while maintaining sufficient alignment accuracy through adaptive adjustment based on distance and velocity
3Reliability
If the display position follows the viewing position movement closely, then the information relationship is maintained, but at high speeds the image becomes difficult to see
Solution Approach 1:
The system changes the parameter of display position changing rate to a value lower than the viewing position changing rate at high velocities. This parameter adjustment reduces the harmful effect of rapid image movement on visibility while maintaining the information-object relationship through distance-based and velocity-based adaptive control
Data Source
AI summary
An information providing apparatus includes one or more processors; and a memory storing instructions, which when executed by the processors, cause the processors to acquire, by a display unit, information on a predetermined position outside a moving body to display an information providing image for providing information associated with the predetermined position as a virtual image; and control the display unit to change a display position of the information providing image according to movement of the moving body. The display position of the information providing image is changed such that a deviation amount between the predetermined position and a position at which a straight line passing through a reference point within the moving body and the display position of the information providing image reaches a surface on which the moving body is moving decreases as a distance between the moving body and the predetermined position decreases.