Patent ID: 9429753
Filing Date: 2016-08-30
CPC Classification: G02B

Claim Text:
1. A head-up display device for mounting on and for use with a vehicle, comprising: a projector configured to project display light including a display image onto a reflecting plate; and a first light source and a second light source configured to project emitted light onto the reflecting plate, wherein the display light from the projector is reflected by the reflecting plate in a viewing direction to define a first display area on the reflecting plate, the emitted light from the first light source is reflected by the reflecting plate in the viewing direction to display a first guiding light in a position adjacent to the first display area on the reflecting plate, the emitted light from the second light source is reflected by the reflecting plate in the viewing direction to display a second guiding light outside the first guiding light on the reflecting plate, and an optical path length from the reflecting plate to the projector is greater than an optical path length from the reflecting plate to the first light source, which is greater than an optical path length from the reflecting plate to the second light source in the viewing direction, wherein when an event involving a need to guide a sight line outward in a first guide direction from the first display area through the first guiding light toward the second guiding light has occurred, the first light source displays the first guiding light, and thereafter, the second light source displays the second guiding light.