26‐3: Assessing Vehicle Driver Performance in Dual‐Depth Head‐Up Displays

Abstract

In recent years, the display information of automotive head‐up displays has gradually developed from single depth to multiple depths. To reduce the driver's workload and reduce the number of eye adjustments, the researchers used the human eye's visual perception to realize the image information that blends with the real world. The results of the study showed that the dual‐depth head‐up display was effective in reducing driver workload.

A varifocal augmented reality head‐up display using Alvarez freeform lenses

“…Several feasible dual-focal AR-HUDs have been proposed. 8,12,13 Generally, two focal planes can be produced by creating two object distances, as shown in Figure 1B. Considering such a design expands the system volume significantly, our recent studies developed a compact dual-focal HUD using one display panel with polarization multiplexing and relay optics.…”

“…[1][2][3][4] Figure 1A shows the widely used freeform mirror architecture of conventional HUDs, in which a display panel creates a fixed virtual image distance (VID) following the fundamentals of geometric optics. However, the benefits of conventional HUDs are limited since they only have a single focal plane with a typical VID of 2.5 m. [5][6][7][8] The fixed VID cannot adapt to varying road environments, which may cause visual fatigue, slower reactions, and so forth. [9][10][11] In addition, the field of view (FOV) of conventional HUDs is usually narrow, for example, 6 by 3 .…”

“…From an optics point of view, AR‐HUDs require at least two focal planes: a far virtual image for interacting with road scenes and a near virtual image for presenting essential driving information. Several feasible dual‐focal AR‐HUDs have been proposed 8,12,13 . Generally, two focal planes can be produced by creating two object distances, as shown in Figure 1B.…”