The invention provides a luminaire comprising an optical element configured to spread light uniformly across a full visible face of the luminaire. The optical element comprises a central region and an outer peripheral region, each configured to receive light emitted by a light source arrangement and to direct this light out through a respective region of the light exit area of the luminaire. The central region receives light through a central transmissive surface portion which partially bounds it across its top. A further reflective tapered portion of the central region acts to reflect light incident at either of its two opposing sides, and provides a mixing function both within the central region of the optical element and within an inner compartment of the luminaire which extends between the optical element and the housing.

A patient warming system for stabilizing and/or heating and cooling a patient includes a plurality of solid-surface sections arranged for attachment to a surgical table and a warming pad layer comprising a plurality of warming pads configured for removable connection to the plurality of solid-surface sections. At least one of the plurality of solid-surface sections includes a power connector for connection to an external power source. Each warming pad of the plurality of warming pads includes a foam insulation layer, a distributed heating element layer having a warming-pad power connection for connection to the power connector, an isothermal layer, and a flexible waterproof layer. Power supplied to the warming-pad power connection of the distributed heating element layer of the respective warming pad can be used to provide a user-selected uniform temperature over the surface of the flexible waterproof layer in order to prevent hot spots.

The present invention discloses a lamp structure. An accommodating cavity is provided for disposing a lamp board. An insulating unit seals the opening of the accommodating cavity for preventing accidental electric shocks when a user cleans or maintains the lamp structure. Placing the lamp board inside the accommodating cavity, the space occupied by the lamp board on the base may be saved. The insulating unit may prevent foreign matters or water from contacting the lamp board and resulting in short circuit or failure in the lamp board. One or more heat dissipating unit may be disposed in the accommodating cavity and used as the heat dissipating structure for the lamp board. A recess may be disposed on an inner side of the accommodating cavity. The recess communicates with the accommodating cavity. A capacitor may be disposed in the recess and connected electrically to the lamp board.

A lighting system includes an LED downlight mountable to a ceiling, a driver, and an insulation displacement connector (IDC). Light from the downlight can be faced downward to project light or upward to reflect light off of the ceiling. The driver has an input with a first voltage and an output with a second voltage, the second voltage being lower than the first and being provided through a wire system extending from the LED driver. The IDC connects the downlight to the wire system. The lighting system can be changed from a first to a second configuration by at least one of adding an additional downlight using a corresponding IDC or removing an existing downlight using a corresponding IDC. The second configuration does not significantly affect a desired output range of light from any downlight or any LED circuit of any downlight that remains or preexists from the first configuration.

Technologies are described for an LED ceiling frame light configured to be mounted with a ceiling support grid. The LED ceiling frame light has a rectangular or square configuration with outwardly extending flanges configured and disposed to lay on inwardly extending flanges on the ceiling support grid. At least two connectors are configured and disposed to removably connect legs, or portions of the LED ceiling frame light, together and form the LED ceiling frame light into a rectangular or square shape with a rectangular or square opening.

Liquid crystal (LC) beam modulation devices are applied to lighting control or to optical wireless communications to improve performance of lighting or communications. A flexible optical network using LC beam modulation and common control of beam intensity and solid angle of beams are also described.

An angle-adjustable lamp comprises a lamp body, a plurality of heat sinks, a plurality of connecting rods, and a plurality of light-transmitting covers. The plurality of heat sinks are rotatably connected to a side wall of the lamp body respectively through the plurality of connecting rods. The plurality of heat sinks are rotationally symmetrically disposed around a longitudinal center axis of the lamp body. Each of the plurality of light-transmitting covers is disposed on a side of a corresponding one of the plurality of heat sinks facing away from the lamp body. When the plurality of heat sinks are rotated around the plurality of connecting rods, an angle between each of the plurality of light-transmitting covers and the lamp body is correspondingly changed, so that a light exit angle of light transmitted through each of the plurality of light-transmitting covers is correspondingly changed.

A lamp is provided, it includes a lamp body, a light-transmitting part, a light source and a power supply component. The lamp body includes a lamp base, the light source is mounted between the lamp base and the light-transmitting plate or mounted in a first cavity between the light-transmitting part and the lamp base, and the light source includes a filament which includes a power supply end electrically connected with the power supply component. The filament includes a plurality of LED chips connected in series, in parallel or in a mixed series-parallel manner. The filament or part of the filament is not in direct contact with the lamp base. Shapes of the light source of the lamp disclosed by the application varies, with better lighting effect and more design freedom at the same time.

An overhead light fixture includes a driver assembly and a light-emitting assembly. The driver assembly includes a driver and a housing. The light-emitting assembly is operably connected to the driver and configured for downward emission of light from a light source of the light-emitting assembly. The light-emitting assembly is detachably secured to the driver assembly. The light fixture is configured to be mounted to a canopy sheet of an overhead canopy, with the driver assembly disposed above the canopy sheet and the light-emitting assembly disposed below the canopy sheet. The driver assembly is optionally configured so that, when the light-emitting assembly is detached from the driver assembly, the driver is removable downwardly through the base portion. A bezel is optionally disposed around a lens of the light-emitting assembly, for aesthetic reasons and/or for controlling a degree of lateral emission of light from the light fixture.

An overhead light fixture includes a driver assembly and a light-emitting assembly. The driver assembly includes a driver and a housing. The light-emitting assembly is operably connected to the driver and configured for downward emission of light from a light source of the light-emitting assembly. The light-emitting assembly is detachably secured to the driver assembly. The light fixture is configured to be mounted to a canopy sheet of an overhead canopy, with the driver assembly disposed above the canopy sheet and the light-emitting assembly disposed below the canopy sheet. The driver assembly is optionally configured so that, when the light-emitting assembly is detached from the driver assembly, the driver is removable downwardly through the base portion. A bezel is optionally disposed around a lens of the light-emitting assembly, for aesthetic reasons and/or for controlling a degree of lateral emission of light from the light fixture.