Software Technology for As antennas that are connected to touch pads, these sensors work

Facebook Technologies, LLC (Menlo Park, CA)

A waveguide display includes light sources as well as a source waveguide, an output waveguide, as well as an electronic controller. Light from each of the sources of light is coupled into the source waveguide. The source waveguide has gratings that have a constant duration calculated based on the requirements for total internal reflection and first order diffraction of the image light received. In a variety of entrance points, the image that is emitted is connected to the output waveguide. The output waveguide emits the expanded image lights at a location that is offset from the entry point. This direction and location is determined by the direction of the source of light. Each of the expanded image lights are linked to a particular field of view of the expanded image light emitted by the output waveguide.

The disclosure is generally related to near-eye-display systems and more specifically to tiled waveguide displays.

Near-eye light fields project images directly into the user’s eye. This is the case for both electronic viewfinders and near-eye displays (NEDs). Conventional near-eye displays (NEDs) typically have a display element that generates image lightthat passes through one or more lenses before reaching the user’s eyes. NEDs utilized in virtual reality or AR systems must be small and lightweight and feature a large exit-pupil and a broad field of view to make it easy to use. A conventional NED could have lenses that are large and be heavy.

The use of waveguide displays is to show information to users. Waveguide displays include a first light source that produces the first image light which corresponds to a specific portion of an image. It also has a secondary light source that emits second light sources that correspond to a portion of an image that is not the first. A source waveguide comprises an initial entrance area, second exit area, and the second exit area and an output waveguide with a third entrance area and the third exit zone. The controller generates scan instructions for the source.

The source waveguide is in-coupled with the first picture light at the first entry area. It then expands the initial light by at most one dimension before releasing it through the first exit. The source waveguide is in-coupled with the second lamp in the second entry point, and expands the second light in a different direction, and then outputs the expanded light via the second exit. The output waveguide couples the first image light and the second image lightat the third entrance, and expands the expanded first image light and expanded second image light in at least one dimension that is opposite to the first to produce an area of magnified image, and then outputs the portion of the magnified image via the third exit area to an eyebox. In certain configurations, the expanded first image light travels along a first direction and the second image light is expanded and propagates along a second direction opposite to the first direction.

In certain instances, the source waveguide receives the first image light at one region, and the second light at a second region that is the first region, and the second region located on the edge of the source waveguide. The first entrance may contain an initial coupling region as well as the second entry zone could contain a second coupling area. Each of the first coupling elements and the second coupling elements comprise grating elements having a certain grating period.

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