2016 Volume 21 Issue 1 Pages 16-23
Combiner head-up display (HUD) has a screen between windshield and driver’s eye-point, and this type of HUD has large structural advantage. However, there are technical problems on ergonomics to design its layout. In this study, depression angle requirements were examined through laboratory experiments focused on the human visual field characteristics. Interference feeling which is elicited by the combiner in driver’s front view was studied by an experiment with a method of adjustment. As a result, it turned out that the depression angle to the top edge of combiner required minimum 8.0 degree to reduce unpleasant feeling, and required minimum 5.8 degree to accept the interference of the combiner. Next, in order to clarify the depression angle requirement which allows a driver to perceive a change in the front view even if the driver is looking at visual information on the combiner, upper useful field of view was measured through an experiment with peripheral vision task. It was thought that the depression angle to the visually presented information should not exceed 9 degree.
