Bifocal head-up display system

摘要

A bifocal head-up display system includes a projector, at least one projection surface in an intermediate image plane, and relay optics to direct a display image to a reflector in a vehicle operator's field of view. The display image includes two image portions focused at different distances from the vehicle operator. A first image portion focused at a first distance may include information related to vehicle operation, and a second image portion focused at a second distance may include to information related to extra-vehicular objects.

主权项

1. A head-up display device to display an image in a vehicle operator's field of view, the head-up display device having a bifocal projection apparatus to focus a first portion of the image at a first distance from the vehicle operator, and to focus a second portion of the image at a second distance further from the vehicle operator than the first distance, wherein the bifocal projection apparatus comprises a projector, relay optics, and a movable projection surface that occupies an intermediate image plane between the projector and the relay optics, and wherein the projection surface is operable to move through a calibrated distance faster than a refresh rate of the projector to enable imaging of the intermediate image plane at different virtual image planes through the relay optics.