Patent ID: 9679367
Date: 2017-06-13
CPC Classifications: B60K,G02B,G06T,H04N

Claim:
1. A head up display for use in a cockpit environment for providing light from an image source, the head up display comprising: a sensor array; a combiner configured to allow viewing of an outside scene and information from the image source, wherein the combiner comprises a waveguide have an input and an output, the light associated with the information traveling from the input to the output by total internal reflection within the waveguide, wherein bright light from the cockpit environment is virtually provided through the waveguide into an eye box at a virtual location; a processing circuit configured to determine the virtual location in response to data from the sensor array and provide a control signal; and a dynamic gradient disposed to selectably reduce or prevent transmission through the combiner of the bright light from the cockpit environment observed by the sensor array in response to the control signal, the dynamic gradient utilizing at least one selectably opaque area to reduce or prevent transmission of the bright light through the combiner, the at least one selectably opaque area corresponding to the virtual location of the bright light on the combiner, and wherein the at least one selectably opaque area is shaped to a correspond to a shape of the bright location at the virtual location on the combiner.