An optical device includes a first waveguide, having parallel first and second faces and parallel third and fourth faces forming a rectangular cross-section, that guides light by four-fold internal reflection and is associated with a coupling-out configuration that couples light out of the first waveguide into a second waveguide. The first or second face is subdivided into first and second regions having different optical characteristics. The optical device also includes a coupling-in configuration having a surface that transmits light into the first waveguide. The surface is deployed in association with a portion of the third or fourth face adjoining the second region such that an edge associated with the surface trims an input collimated image in a first dimension, and a boundary between the first and second regions trims the input collimated image in a second dimension to produce a trimmed collimated image that advances by four-fold internal reflection.

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 luminaire module (100) includes light-emitting elements (LEEs) (110) arranged to provide light; a light guide (130) including a receiving end (131a) and an opposing end (131b), the receiving end (131a) arranged to receive light provided by the LEEs (110), a core (134) including a first transparent material with a first refractive index (n1), the core (134) having a pair of opposing side surfaces (132a, 132b) extending along a length of the light guide (130) between the receiving and opposing ends (131a, 131b), and a cladding (136) including a second material having a second smaller refractive index (n2), the cladding (136) extending across and being in contact with at least a portion of the opposing side surfaces (132a, 132b) forming a cladding-core interface. The cladding-core interface is optically smooth. Additionally, the luminaire module (100) includes an optical extractor (140) arranged to receive guided light from the opposing end (131b) of the light guide (130) and configured to output into the ambient environment at least some of the received guided light.

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.

A variety of illumination devices are disclosed that are configured to manipulate light provided by one or more light-emitting elements (LEEs). In general, embodiments of the illumination devices feature one or more optical couplers that redirect illumination from the LEEs to a reflector which then directs the light into a range of angles. In some embodiments, the illumination device includes a second reflector that reflects at least some of the light from the first reflector. In certain embodiments, the illumination device includes a light guide that guides light from the collector to the first reflector. The components of the illumination device can be configured to provide illumination devices that can provide a variety of intensity distributions. Such illumination devices can be configured to provide light for particular lighting applications, including office lighting, task lighting, cabinet lighting, garage lighting, wall wash, stack lighting, and downlighting.

A light-emitting module includes a light guide plate including a first surface, and a second surface opposite to the first surface; a light-emitting device disposed at a second surface side of the light guide plate; a first light-reflective member provided at a periphery of the light-emitting device at the second surface side; and a second light-reflective member provided outward of the first light-reflective member at the second surface. A diffuse reflectance of the first light-reflective member for light emitted by the light-emitting device is greater than a diffuse reflectance of the second light-reflective member for the light emitted by the light-emitting device.

An optical element includes a transparent layer, outcoupling elements, and a waveguide structure. The outcoupling elements are positioned across the transparent layer. The waveguide structure provides non-visible light to the outcoupling elements and the outcoupling elements outcouple the non-visible light as non-visible illumination light to illuminate an eye region.

The liquid crystal display device includes an edge backlight including a transparent light guide plate and light-emitting elements of multiple colors that are disposed such that the light-emitting elements of multiple colors are adjacent to each other, a dimming liquid crystal layer that is disposed such that the dimming liquid crystal layer overlaps at least an end portion of the transparent light guide plate that faces the light-emitting elements of multiple colors in a plan view and that has a degree of haze that increases or decreases by applying a voltage, and a transmissive liquid crystal display panel that includes pixels. With the backlight on, the dimming liquid crystal layer is in a diffusion state, and the liquid crystal display panel performs the color display. With the backlight off, the dimming liquid crystal layer is in a transmission state, and the liquid crystal display panel performs the transparent display.

A display device has two flat regions and a bending region located between the two flat regions. The display device includes a reflective display device, a cover structure, and a light guide plate. The cover structure is located above the reflective display device. The light guide plate is located between the reflective display device and the cover structure. The light guide plate has a microstructure, and the microstructure is located on a top surface of the light guide plate close to the cover structure. The microstructure has a plurality of second microstructures located at the bending region, and the sizes of the second microstructures vary along with the distances between the second microstructures and a center position of the light guide plate.

A light-emitting device is provided, which includes a circuit board, a plurality of light-emitting elements, a first reflective element, and a second reflective element. The light-emitting elements are arranged on the circuit board. The first reflective element is disposed on the circuit board. The second reflective element is disposed on the circuit board. The first reflective element has a first reflectivity R1. The second reflective element has a second reflectivity R2. The first reflectivity R1 is different from the second reflectivity R2. The first reflectivity R1 and the second reflectivity R2 satisfy the following formula: 0<|(R1−R2)|/Max (R1, R2)<20%.