A light source unit includes: a display device configured to emit light that has a substantially Lambertian light distribution and to display a picture; a first prism sheet on which the light emitted from the display device is incident; and an imaging optical system that includes an input element on which light emitted from the first prism sheet is incident and an output element on which light that has passed through the input element is incident, and configured such that light emitted from the output element forms a first image corresponding to the picture. The imaging optical system has a substantially telecentric property on a side of the first image.

There is provided a light source to emit an output light along an output path. The light source includes a substrate, and a plurality of light emitters disposed on the substrate in the output path. The light emitters each have a footprint on the substrate and extend away from the substrate laterally to the output path. The light emitters each include a quantum well to emit the output light when the light emitter is electrically biased. Moreover, the light emitters each have a refractive index higher than a corresponding refractive index of an environment outside of and abutting the light emitters. The light emitters may each include a nanorod, and each pair of neighboring nanorods may be spaced from one another along the output path by a distance being about n/2, where is a wavelength of the output light and n is a natural number.

The lighting device disclosed at an embodiment of the invention includes a substrate; a first reflective layer disposed on the substrate and having a plurality of reflection patterns; a light source disposed on the substrate; a resin layer disposed on the first reflective layer, and a second reflective layer disposed on the resin layer and having a plurality of holes, wherein an arrangement form of the plurality of holes is the same as that of the plurality of reflection patterns.

A self-monitoring system for a micro-LED display panel can track a health status of the micro-LED emitters over the life cycle of the display. The self-monitoring system can include, for example, light sensors and a coverglass treated with an anti-reflective coating that directs light emitted by the micro-LED array toward the light sensors. Light captured by the light sensors can then be analyzed to determine the current value of light attributes such as color, polarization, and intensity, and to compare the current values of the light attributes with their previous values to monitor changes over time.

A micro LED element, a micro LED display panel, and a display device are provided. The micro LED element includes: a first semiconductor layer, a light emitting layer, and a second semiconductor layer stacked from top down, wherein the first semiconductor layer includes: a main part for passing light generated by the light emitting layer; and an extension part for connecting to the extension part of the first semiconductor layer of an adjacent micro LED element; and a metal contact including a plurality of metal particles arranged on or above the extension part of the first semiconductor layer.

A display device for projecting light to an object includes a substrate having a first region overlapping a first curved surface of the object and a second region overlapping a second curved surface of the object, light-emitting elements disposed on the substrate, and a light adjusting layer disposed on the light-emitting elements. The light-emitting elements include a first light-emitting element disposed in the first region and a second light-emitting element disposed in the second region. The light adjusting layer includes a first light-adjusting element enabling the first light-emitting element to emit a first emitted light with a first light-emitting direction and a second light-adjusting element enabling the second light-emitting element to emit a second emitted light with a second light-emitting direction. An included angle between the second light-emitting direction and a normal direction of the substrate is greater than that between the first light-emitting direction and the normal direction.

A light emitting device includes a backplane, first, second and third light emitting diodes located on the backplane, a first patterned metamaterial lens containing first nanostructures located over the first light emitting diode, a second patterned metamaterial lens containing second nanostructures located over the second light emitting diode, and a third patterned metamaterial lens containing third nanostructures located over the light emitting diode. A configuration of the first nanostructures differs from a configuration of the second nanostructures, and a configuration of the third nanostructures differs from the configurations of the first and the second nanostructures.

A formulation for preparing an optical layer, preferably a particle-free optical layer, preferably to be used for nanoimprint lithography, more preferably to be used for direct UV nanoimprint lithography comprises compound A and a metal oxide precursor. Compound A is represented by the formula: X (NO.sub.2.sup.).sub.n, wherein X and n are defined herein. The formulation may exhibit at least one of properties as an advanced material or as a high performance material. The formulation may be used in the nanotechnology process to make semiconductor device/display device application, for example semiconductor chip, or a liquid crystal, quantum dot, OLED display fabricated on a substrate controlled by semiconductors.

A transparent display with lensless imaging capability includes display pixels configured to generate a display image, light emitters configured to illuminate a scene or an object with electromagnetic radiation outside the visible domain, photosensitive elements configured to capture electromagnetic radiation received from the scene or the object and to generate photo signals depending on the captured electromagnetic radiation, and an optical modulator configured to transmit electromagnetic radiation in the visible domain, and to modulate electromagnetic radiation within the illumination wavelength range. The display is substantially transparent in the visible domain.