Example display devices include a waveguide configured to propagate visible light under total internal reflection in a direction parallel to a major surface of the waveguide. The waveguide has formed thereon an outcoupling element configured to outcouple a portion of the visible light in a direction normal to the major surface of the waveguide. The example display devices additionally include a polarization-selective notch reflector disposed on a first side of the waveguide and configured to reflect visible light having a first polarization while transmitting the portion of the visible light having a second polarization. The example display devices further include a polarization-independent notch reflector disposed on a second side of the waveguide and configured to reflect visible light having the first polarization and the second polarization, where the polarization-independent notch reflector is configured to convert a polarization of visible light reflecting therefrom.

The present disclosure relates to modular waveguide displays including: a modular frame; a waveguide lens attached to the modular frame, where the waveguide lens in configured to be attached to the modular frame to locate one or more waveguides within the waveguide lens in front of the modular frame; and an optical engine which is configured to be attached to the modular frame, wherein, when the optical engine is attached to the modular frame, the optical engine is configured to provide image containing information to a front side of the one or more waveguides. Advantageously, a modular waveguide display allows for customization by a user. The modular waveguide display is designed to operate without such components as the optical engine when such functionality is undesired to save weight and power. Also, modular waveguide displays allow for parallel development of components such as the waveguide lens and the optical engine.

A planar light source includes: a support member including a wiring substrate, a light guide member, a light source disposed in a hole of the light guide member, and a first reinforcing member disposed on the support member and surrounding the light guide member in a plan view. The first reinforcing member includes first and second portions extending in a first direction and facing each other, and includes third and fourth portions extending in a second direction orthogonal to the first direction and facing each other. At least one of the first portion, the second portion, the third portion, and the fourth portion has light reflectivity to light emitted from the light source. In the plan view, the light guide member is located between the first and second portions in the second direction, and is located between the third and fourth portions in the first direction.

A backlight module includes a flexible circuit board and a light guide plate. A first light source assembly, a second light source assembly, and a positioning member are disposed on the flexible circuit board. The light guide plate is disposed over the flexible circuit board and includes a first single key light guide area, a second single key light guide area, and a connection area. The first single key light guide area has a first through hole accommodating the first light source assembly. The second single key light guide area has a second through hole accommodating the second light source assembly. The connection area is located between the first and second single key light guide areas and has an accommodating hole. The flexible circuit board is overlapped with the light guide plate with the positioning member being accommodated in the accommodating hole.

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 method of making suspended lighting fixtures that includes the use of flexible sheets of optically transmissive material, LED strips, and a linear heat-dissipating structure. The method comprises providing a first flexible sheet having a first major surface, an opposing second major surface, and a first edge having a first light input surface. A pair of flexible sheets of an optically transmissive material are provided, each having an edge with a light input surface. A first LED strip and a second LED strip are provided along with a linear heat-dissipating structure having a first channel and a second channel. The LED strips are positioned within the respective channels and attached to the body of the linear heat-dissipating structure. The edges of the flexible sheets are positioned within the respective channels and in proximity to the respective LED strips. The flexible sheets may be bent to a curved shape.

To improve brightness of an image to be perceived by a user and enhance visibility there is provided a light guide plate including an incident diffraction grating which diffracts incident imaging light, an exit diffraction grating through which the imaging light goes out, and an intermediate diffraction grating existing in optical paths from the incident diffraction grating to the exit diffraction grating. In this light guide plate, a periodic linear corrugated pattern is formed as the incident diffraction grating, and when an imaginary line is established that passes through an incident point of imaging light onto the incident diffraction grating and is parallel with a periodic direction of the corrugated pattern, the intermediate diffraction grating has a first region on one side of the imaginary line and a second region on another side of the imaginary line.

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 refrigerator includes a cabinet having a storage chamber therein, and a door for opening and closing the cabinet, the door includes a door body and a panel assembly coupled to a front face of the door body, the panel assembly includes a front plate forming an outer appearance of a front face of the panel assembly, a light guide plate disposed to be spaced apart from a rear face of the front plate, a lighting device including a light source for irradiating light to the light guide plate and a substrate where the light source is disposed, wherein the lighting device is disposed to be spaced apart from one surface of the light guide plate, and a bracket having a receiving space for accommodating the lighting device therein, and the bracket includes a support for supporting the light guide plate or for determining the position of the light source.

A light emitting device includes a light source and a waveguide structure. The light source emits light having a directionality. The waveguide structure includes an optical waveguide and an exterior part. The optical waveguide has an incident end surface and an emission end surface, converts a wavelength of the light incident from the incident end surface, and emits the light from the emission end surface. The exterior part is optically transparent and covers the optical waveguide such that the incident end surface and the emission end surface are exposed from the exterior part. The optical waveguide is elongated in a length direction. The length direction of the optical waveguide is inclined at a predetermined angle with respect to an optical axis of the light in a predetermined plane including the length direction of the optical waveguide and the optical axis of the light. The predetermined angle is set to allow the light to propagate in the optical waveguide with total internal reflection at a boundary surface between the optical waveguide and the exterior part.