Functional requirements of automotive head-up displays: A systematic review of literature from 1994 to present

Ecological Interface Design and Head-Up Displays: The Contact-Analog Visualization Tradeoff

OBJECTIVE

This study investigated how the visualization of an ecological interface affects its subjective and objective usefulness. Therefore, we compared a simple 2D visualization against a contact-analog 3D visualization.

BACKGROUND

Recently, head-up displays (HUDs) have become contact-analog and visualizations have been enabled to be merged with the real environment. In this regard, ecological interface design visualizing boundaries of acceptable performance might be a perfect match. Because the real-world environment already provides such boundaries (e.g., lane markings), the interface might directly use them. However, visual illusions and undesired interference with the environment might influence the overall usability.

METHOD

To allow for a comparison, 49 participants tested the same ecological interface in two configurations, contact-analog (3D) and two dimensional (2D). Both visualizations were shown in the car's head-up display (HUD).

RESULTS

The driving simulator experiment reveals that 3D was rated as more demanding and more disturbing, but also more innovative and appealing. However, regarding driving performance, the 3D representation decreased the accuracy of speed control by 6% while significantly increasing lane stability by 20%.

CONCLUSION

We conclude that, if we want environmental boundaries guiding our behavior, the indicator for the behavior should be visualized contact-analog. If we desire artificial boundaries (e.g., speed limits) to guide behavior, the behavioral indicator should be visualized in 2D. This is less prone to optical illusions and allows for a more precise control of behavior.

APPLICATION

These findings provide guidance to human factors engineers, how contact-analog visualizations might be used optimally.

Awareness of the real-world environment when using augmented reality head-mounted display

Augmented reality (AR) systems are becoming common tools in industrial workplaces. However, factory workers are still concerned about whether head-mounted display (HMD)-based AR systems distract their awareness of the environment and therefore pose safety risks. The purpose of this study was to assess users' experience of real-world awareness when using an AR system. 19 study participants played a wooden block logic game in a laboratory with three different setups: real, AR and virtual reality (VR). Based on this study, it can be concluded that HMD-based AR systems do not decrease users' awareness of their surroundings if the virtual content is minimal and the task is done while seated. However, it was seen that more research in this area with more interactive virtual content is required. This study is an important step in understanding how AR may affect future work in industrial and safety-critical environments.

The Application of Augmented Reality in the Automotive Industry: A Systematic Literature Review

Augmented reality (AR) is a fairly new technology enabling human machine interaction by superimposing virtual information on a real environment. Potential applications can be found in many areas of research from recent years. This study presents a systematic review of existing AR systems in the automotive field, synthesizing 55 studies from 2002 to 2019. The main research questions are: where AR technology has been applied within the automotive industry, what is the purpose of its application, what are the general characteristics of these systems, and what are the emphasized benefits and challenges of using AR in this field? The aim of this paper is to provide an insight into the AR applications and technologies in the automotive field.