自動車用ヘッドアップディスプレイの前景視認特性 表示像と前景が重畳する場合

Abstract

Although originally developed for aircraft use, head-up displays (HUDs) have recently been applied to automobiles. As these devices are adapted to other applications such as navigation, route guidance, and obstacle avoidance systems, they will require more complex display patterns and wider display areas.It is critical that these HUD images do not affect a driver's ability to recognize objects in the outside environment under any condition because recognizing these objects is always a primary driver task.In driving a vehicle equipped with a HUD, the most difficult condition for recognizing the outside environment seems to be when the displayed image is superimposed on objects in the road and more than 50 percent of oncoming vehicles have their headlights turned on.In this paper, we investigate a driver's ability to recognize the outside environment, under these conditions in both the central and the peripheral field of vision, using tachistoscopic exposure of test targets.It is determined that the level of displayed image luminance affects a driver's ability to recognize outside objects. However, objects recognition in the forward view is found to be much improved, not only in the central field of vision, but also in the peripheral field of vision if the velocity of the vehicle is increased slgihtly.