Abstract: An apparatus for use in replicating an image associated with an input-pupil to an output-pupil includes a planar optical waveguide including a bulk-substrate, and also including an input-coupler, an intermediate-component and an output-coupler. The input-coupler couples light corresponding to the image into the bulk-substrate and towards the intermediate-component. The intermediate-component performs horizontal or vertical pupil expansion and directs the light corresponding to the image towards the output-coupler. The output-coupler performs the other one of horizontal or vertical pupil expansion and couples light corresponding to the image, which travels from the input-coupler to the output-coupler, out of the waveguide. The apparatus further includes an adjacent planar optical component to provide a more uniform intensity distribution compared to if the adjacent planar optical component were absent.

Abstract: A Si-based light emitting diode structure and a method for fabricating the Si-based light emitting diode structure are each predicated upon a multilayer material layer that comprises alternating, interposed and laminated sub-layers of: (1) a group IV nanocrystal material; and (2) an erbium or neodymium doped dielectric material. The light emitting diode structure is preferably laterally actuated to provide both efficient photoluminescence and electroluminescence. The group IV nanocrystal material may comprise a silicon nanocrystal material and the doped dielectric material may comprise an erbium doped silicon oxide material.

Abstract: The present disclosure describes touch interfaces that feature optical touch navigation. A lighting device distributes a light over an optical element that, in turn, generates a light beam at an exit of the optical element by internally reflecting the light. A sensing device captures images in response to the light beam striking the sensing device. A processing device detects an object proximate to the optical element by comparing successive images captured by the sensing device.