HOLOGRAPHIC COLLECTION AND EMISSION TURNING FILM SYSTEM

摘要

Various examples of diffraction grating layers for touch/proximity sensing apparatus are provided. The touch/proximity sensing apparatus may include a light guide and light sources edge-coupled to first side of the light guide. Light sensors may be edge-coupled to a second side of the light guide. The apparatus may include light sensors edge-coupled to the first side of the light guide and/or light sources edge-coupled to the second side of the light guide. A single diffraction grating layer proximate the light guide may be capable of extracting light from the light guide and of directing incident light into the light guide and towards the light sensors. In some examples, a single area or volume of the diffraction grating layer may include a diffraction grating capable of extracting light from the light guide and a diffraction grating capable of directing incident light into the light guide and towards a light sensor.

主权项

1. An apparatus, comprising:
a light guide; a light source system including a first plurality of light sources capable of coupling light into a first side of the light guide; a light sensor system including a plurality of light sensors edge-coupled to at least a second side of the light guide; and a diffraction grating layer proximate the light guide, the diffraction grating layer including:
a first plurality of diffraction grating elements capable of extracting light from the light guide and directing extracted light out of the light guide; anda second plurality of diffraction grating elements capable of directing incident light into the light guide and towards the plurality of light sensors.