Patent ID: 9022575
Filing Date: 2015-05-05
Classification: G02B,G03B

Abstract:
1. A portable display device, comprising: a pico-projector positioned relative to a transparent bottom surface of a multilayer display so as to project onto the transparent bottom surface of the multilayer display; wherein the multilayer display includes a focusing layer and a light redirection layer comprising a composite bottom layer of the multilayer display and a focus plane comprising a top layer of the multilayer display; wherein the focus plane comprises a planar region of transparent regions surrounded by an opaque region; wherein the composite bottom layer of the multi-layer display focuses and directs incoming light rays striking the transparent bottom surface of the multilayer display from the pico-projector to corresponding transparent regions of the focus plane, thereby causing the projection of the pico-projector from the bottom of the multilayer display to appear on the top of the multilayer display through the transparent regions of the focus plane; and a transparent layer disposed between the focus plane and composite bottom layer to space micro-reflectors within the focusing layer at a distance from the focus plane that is sufficient to ensure that focal points of each micro-reflector coincide with the transparent regions of the focus plane.