An Electrically Switchable Bragg Grating (ESBG) despeckler device comprising at least one ESBG element recorded in a hPDLC sandwiched between transparent substrates to which transparent conductive coatings have been applied. At least one of said coatings is patterned to provide a two-dimensional array of independently switchable ESBG pixels. Each ESBG pixel has a first unique speckle state under said first applied voltage and a second unique speckle state under said second applied voltage.

A planar light source includes: a light guide member, a light source including a light-emitting element and a first light adjustment member and being disposed in a first hole of the light guide member, a first light-transmissive member disposed in the first hole between a lateral surface of the light source and the light guide member and on the light source, and a second light adjustment member disposed on the first light-transmissive member. A transmittance of the first light-transmissive member is higher than a transmittance of the first light adjustment member and a transmittance of the second light adjustment member with respect to light emitted from the light source. The first light-transmissive member includes a first light-transmissive portion 1ocated between the first light adjustment member and the second light adjustment member, and a second light-transmissive portion 1ocated between the lateral surface of the light source and the light guide member.

A system is provided. The system includes a waveguide configured to guide an image light to propagate inside the waveguide. The system also includes a plurality of diffractive components coupled to the waveguide and switchable between operating in a diffraction state to direct the image light from the waveguide to an eye-box of the system, and operating in a non-diffraction state to transmit a light from a real-world environment to the eye-box. The system further includes a controller coupled with the plurality of diffractive components and configured to switch each of the plurality of diffractive components between operating in the diffraction state during a virtual-world subframe of a display frame and operating in the non-diffraction state during a real-world subframe of the display frame.

A light guide body in a display device includes a first incident surface on which an image light is incident, and a second emission surface from which the image light is emitted. The light guide body includes a second emission optical element that diffracts the image light to emit a portion of the image light at a predetermined emission angle every time the image light enters the second emission optical element from a predetermined direction. The image light is diverged by being emitted from the second emission optical element such that the predetermined emission angle varies in accordance with a location in one predetermined region included in a plurality of predetermined regions of the optical element. The degree of divergence varies between the one predetermined region and other predetermined region included in the plurality of predetermined regions in accordance with the location of the virtual image.

A light emitting device comprises a lightguide formed from a film having an array of coupling lightguides in the form of strips extending from a lightguide region of the film, the coupling lightguides are folded and stacked, and a light source is positioned to emit light into edges of the stacked coupling lightguides to propagate into a light mixing region and then into a light emitting region. The light mixing region comprises a plurality of reflecting surfaces that reflect a portion of the light from the coupling lightguides toward one or more of the lateral edges of the film prior to exiting the film in the light emitting region. The plurality of reflecting surfaces may a light transmitting material printed in the form of lines on the surface of the film and may improve the uniformity of light emitted from the light emitting region.

A planar light source includes: a light guide member, a light source including a light-emitting element and a first light adjustment member and being disposed in a first hole of the light guide member, a first light-transmissive member disposed in the first hole between a lateral surface of the light source and the light guide member and on the light source, and a second light adjustment member disposed on the first light-transmissive member. A transmittance of the first light-transmissive member is higher than a transmittance of the first light adjustment member and a transmittance of the second light adjustment member with respect to light emitted from the light source. The first light-transmissive member includes a first light-transmissive portion 1ocated between the first light adjustment member and the second light adjustment member, and a second light-transmissive portion 1ocated between the lateral surface of the light source and the light guide member.

An optical system includes a partial-internal-reflection rectangular light guide (PRLG) (10) having three surfaces supporting internal reflection and a partially-reflecting fourth surface (34) with which a second light guide portion (30) is associated. A light beam redirecting arrangement, typically including a set of embedded partially-reflecting surfaces (12), in light guide portion (30) redirects light emerging from the PRLG towards a third light guide portion (20) that includes a coupling-out configuration (122), such as a further set of partially-reflecting surfaces (28), coupling-out light beams of an image towards the eye of a user.

An under-counter lighting system places a light-guide panel (LGP) or a set of LGPs under a countertop, or another such work surface, in order to backlight it. Specifically, a base layer is secured to a support, such as a cabinet. The base layer includes a support layer and a number of support posts attached to the support layer. An LGP layer includes the LGP or LGPs. Each of the LGPs has openings that correspond to positions of the support posts, such that the LGPs receive the support posts through their thicknesses. A countertop is secured to the tops of the support posts and may have a depending lip or other such feature sufficient to hide the base layer and the LGP layer. The resulting light, usually at least partially transmitted through the countertop itself, can serve as ambient light, task light, or accent light, depending on the installation.

A waveguide display includes light sources, a source waveguide, an output waveguide, and a controller. Light from each of the light sources is coupled into the source waveguide. The source waveguide includes gratings with a constant period determined based on the conditions for total internal reflection and first order diffraction of the received image light. The emitted image light is coupled into the output waveguide at several entrance locations. The output waveguide outputs expanded image lights at a location offset from the entrance location, and the location/direction of the emitted expanded image light is based in part on the orientation of the light sources. Each of the expanded image light is associated with a field of view of the expanded image light emitted by the output waveguide.

In an image display device in which two light guides are combined, flat plates (16, 17) of the same material as that of a substrate (11) of a first light guide (10) is affixed to the outsides of a first surface (11a) and a second surface (11b) of the substrate (11), the first surface (11a) and the second surface (11b) opposing each other. Image light introduced into the substrate (11) is reflected by an incident-side reflective surface (12) toward exit-side reflective surface (13a to 13f), which are half mirrors, and a part of the image light is reflected in stages by the respective exit-side reflective surfaces (13a and 13f) and the remainder of the image light is transmitted. The image light reflected by the exit-side reflective surfaces (13a to 13f) is emitted through the second flat plate (17) and introduced into a second light guide. The part of the image light reflected by the incident-side reflective surface (12) reaches the interface between the first surface (11a) and the first flat plate (16), but enters the flat plate (16) without being reflected, and hits and is absorbed by a light-absorbing sheet (18). This reduces the occurrence of stray light and improves the visibility of a virtual image displayed before user's eyes.