| abstract |
This disclosure provides systems, methods, and apparatuses for hiding optical contrast features. To reduce visibility of an elongated optical contrast feature, such as a wire on a transparent light guide, neighboring light-turning features in the light guide are “moved” relative to their location in a layout where they are physically uniformly distributed. This movement renders the local optical density in the region around the wire more equal to the optical density in other regions of the light guide. The movement of neighboring light-turning features occurs principally within a distance from the wire that is within the width of the line spread function of the human eye at a normal viewing distance. The uniformity of the local optical density is therefore increased, and the human eye does not perceive the wires as being separate structures. Thus, the wires can be “hidden” within a field of light-turning features. |