LCDs and/or CRTs have widely been used as display devices in the information terminals, ie. GPS navigation systems, installed in automobiles built in 1990s-2000s. However, no method of determining the luminance of color images necessarily meets the visual environment in the automobiles. In order to solve this visual environmental issue, we examined the… (More)
First this paper discusses the relation behveen perception of displayed image and angle of depression in automotive Head-Up Displays (HUDs). Second, we can point out a new serious problem of misconception of displayed information, if the angle is very small in practical HUDs. Lastly we describe what this stems from through psycho physical experiments.