Patent ID: 9651779
Date: 2017-05-16
CPC Classifications: B60K,B60Q,G02B,G09G

Claim:
1. A head-up display device mounted on a vehicle, comprising: a projector configured to project display light including a display image through a first emitting port onto a reflecting plate directed toward a driver's eye; a pair of first light sources and a pair of second light sources configured to project emitted light through a second emitting port onto the reflecting plate, the first light sources and the second light sources are fixed in a respective position relative to the projector; and a controller connected to the first light sources and the second light sources, wherein the display light from the projector is reflected by the reflecting plate in a viewing direction to define a display area on the reflecting plate, the emitted light from the first light sources is reflected by the reflecting plate in the viewing direction to display a pair of first guide lights side by side adjacent to a common side of the display area on the reflecting plate such that the first guide lights remain adjacent to the common side of the display area, the emitted light from the second light sources is reflected by the reflecting plate in the viewing direction to display a pair of second guide lights at outer sides of the respective first guide lights and on the common side of the display area on the reflecting plate such that the second guide lights remain adjacent to the common side of the display area and remain fixed relative to the first guide lights, the controller controls lighting states of the first light sources and the second light sources to change at least one of a number of light sources to be lit, a lighting cycle, and a lighting order of the first light sources and the second light sources in accordance with a differential value between a current traveling speed of the vehicle and a speed limit set for a road on which the vehicle is traveling, and a first pair of prisms positioned in first and second light paths, respectively, of the pair of first light sources, and a second pair of prisms positioned in third and fourth light paths, respectively, of the pair of second light sources.