Apparatus and method for suppressing double images on a combiner head-up display

摘要

A head-up display system and method are provided that suppress double images from a combiner by eliminating or reducing a reflection of a refracted image from the back surface of the combiner. The combiner contains a tilted axis polarizing structure that attenuates transmittance and subsequent reflection of a refracted polarized projector image but maintains high transmittance for the forward external scene imagery.

主权项

1. A head-up display system for overlaying a projected image onto an external scene image, the head-up display system comprising:
a combiner having a first surface and a second surface and including a uniaxially absorbing polarizing structure; a polarized image generation system configured to project polarized light onto the combiner; and the uniaxially absorbing polarizing structure having a local absorption axis and disposed on the combiner to define the first surface, or within the combiner between the first surface and the second surface, the local absorption axis being normal to the first surface, the combiner configured to reflect from the first surface a first portion of the polarized light from the image generation system toward a design eye point for the head-up display system, and the uniaxially absorbing polarizing structure configured to substantially absorb a second portion of the polarized light from the image generation system.