Embodiments of the present disclosure disclose a polarizer sheet, a liquid crystal display device and a fabricating method of a polarizer sheet a polarizer sheet. The polarizer sheet includes a polarizing layer and an up-conversion luminescence material layer located on a side of the polarizing layer, the up-conversion luminescence material layer being capable of emitting visible light under excitation of an external light.

A laser projection system having built-in safety systems is disclosed. Further disclosed is a method of operating a laser projection system such that safe operation is a factor only of meeting a threshold distance between the laser unit and an audience member. To accomplish safe operation at the threshold distance, the laser projection system is pre-calibrated to operate below maximum permitted exposure levels at the threshold distance. In this manner of operation, laser lighting can be accomplished by non-laser professionals without the complexity, external sensors, and need for calibration at the venue.

A laser projection system having built-in safety systems is disclosed. Further disclosed is a method of operating a laser projection system such that safe operation is a factor only of meeting a threshold distance between the laser unit and an audience member. To accomplish safe operation at the threshold distance, the laser projection system is pre-calibrated to operate below maximum permitted exposure levels at the threshold distance. In this manner of operation, laser lighting can be accomplished by non-laser professionals without the complexity, external sensors, and need for calibration at the venue.

A structured light system may include a semiconductor laser to emit light and a diffractive optical element to diffract the light such that one or more diffracted orders of the light, associated with forming a structured light pattern, are transmitted by the diffractive optical element. The diffractive optical element may be arranged such that the light is to be incident on the diffractive optical element at a substantially non-normal angle of incidence. The substantially non-normal angle of incidence may be designed to cause the diffractive optical element to transmit a zero-order beam of the light outside of a field of view associated with the diffractive optical element.

Facilitating support functionalities through a support appliance device in advanced networks (e.g., 4G, 5G, and beyond) is provided herein. A method can comprise facilitating, by a support appliance device comprising a processor, a dedicated communication link with a remote support entity via a secure internet connection. The method also can comprise, based on a receipt of a request for an active session, establishing, by the support appliance device, the active session with the remote support entity via the dedicated communication link. Further, the method can comprise receiving, by the support appliance device, input data associated with an item. The method also can comprise outputting, by the support appliance device, an indication on the item based on the support appliance device being in proximity of the item. An instruction related to the indication can be controlled by the remote support entity and implemented by the support appliance device.

Facilitating support functionalities through a support appliance device in advanced networks (e.g., 4G, 5G, and beyond) is provided herein. A method can comprise facilitating, by a support appliance device comprising a processor, a dedicated communication link with a remote support entity via a secure internet connection. The method also can comprise, based on a receipt of a request for an active session, establishing, by the support appliance device, the active session with the remote support entity via the dedicated communication link. Further, the method can comprise receiving, by the support appliance device, input data associated with an item. The method also can comprise outputting, by the support appliance device, an indication on the item based on the support appliance device being in proximity of the item. An instruction related to the indication can be controlled by the remote support entity and implemented by the support appliance device.

An illumination device includes an emission layer including a semiconductor-based light emitter; and an optical layer disposed on the emission layer. The optical layer includes an optical element, such as a lens, at least partially aligned with the semi-conductor-based light emitter. The optical layer is formed of a material having a negative coefficient of thermal expansion (CTE). For instance, the semiconductor-based light emitter is configured to emit light at a wavelength λ, and in which a pitch p of the MLA, a thickness z of the optical layer, and the wavelength λ satisfy a predefined relationship.

A structured light system may include a semiconductor laser to emit light and a diffractive optical element to diffract the light such that one or more diffracted orders of the light, associated with forming a structured light pattern, are transmitted by the diffractive optical element. The diffractive optical element may be arranged such that the light is to be incident on the diffractive optical element at a substantially non-normal angle of incidence. The substantially non-normal angle of incidence may be designed to cause the diffractive optical element to transmit a zero-order beam of the light outside of a field of view associated with the diffractive optical element.

An optical system of a cross line laser, and a cross line laser. The optical system of the cross line laser includes light emitting elements, which include a first light emitting element and a second light emitting element, which emit a first light ray and a second light ray, respectively, of different colors; the control unit is connected with the light emitting elements, and turns on or off the first light emitting element and the second light emitting element; the optical means includes a semi-transparent mirror fixed on the optical path of the first light ray and the second light ray; the first light ray passes through the semi-transparent mirror and is emitted as a third light ray; and the second light ray is refracted by the semi-transparent mirror as a fourth light ray. The colors of the cross line laser can be switched using the optical system.

An optical lens assembly is provided. The optical lens assembly includes first, second, third and fourth lens elements having refracting power arranged along an optical axis in a sequence from a light output side to a light input side. The first lens element is arranged to be a lens element in a fourth order from the light input side to the light output side. The second lens element is arranged to be a lens element in a third order from the light input side to the light output side. The third lens element is arranged to be a lens element in a second order from the light input side to the light output side. The fourth lens element is arranged to be a lens element in a first order from the light input side to the light output side.