A heat sink and power interconnect for a UV LED array are provided. A first circuit is disposed on a surface of a first substrate. A UV LED array is positioned thereon. A second substrate and second circuit are spaced apart from the first substrate and a first heat sink is positioned adjacent thereto. An aperture passes through each of the first substrate, the second substrate, and the heat sink. An electrical insulator lines the aperture with an electrically and thermally conductive liner positioned adjacent to the electrical insulator. A fastener is positioned in the aperture and electrically interconnects the first circuit and the second circuit through the electrically and thermally conductive liner and electrically communicates with an external power supply. The fastener carries one or more of a power or an electrical signal, and dissipates heat through the electrically and thermally conductive liner to the heat sink.

(Problem) To provide a small light illuminating apparatus configured to uniformly cool a plurality of light emitting diodes (LEDs) (Problem-solving approach) A light illuminating apparatus that irradiates light of a line shape includes a light source unit having a plurality of light sources arranged along a first direction on a surface of a substrate, a heat dissipation unit having a plurality of heat sink fins formed along the first direction, and thermally coupled to an opposing surface side of the substrate, a housing which receives the heat dissipation unit and forms a wind tunnel with a cooling wind flowing inside, wherein the cooling wind cools the heat sink fins, and a first cooling fan which generates the cooling wind flowing in the first direction within the wind tunnel, wherein at least one of opposite sides of a second direction of the housing has an air hole through which the cooling wind is discharged to outside via the plurality of heat sink fins, or the cooling wind is absorbed via the plurality of heat sink fins from outside, and the wind tunnel serves as a pressure chamber in which positive pressure or negative pressure is produced by the cooling wind.

An emitter, in particular a lamp, and a method for emitting light are described. The emitter comprises at least one LED element for producing electromagnetic radiation in a first frequency range and an active cooling unit for cooling the at least one LED element, having at least one cooling channel for a coolant. The at least one cooling channel is arranged at least partially in a beam path of the electromagnetic radiation produced by the at least one LED element. The coolant comprises at least one phosphor for converting at least a part of the electromagnetic radiation into light to be emitted in a second frequency range, which is different from the first frequency range.

The inventive device efficiently cools, with a simple construction, heat generated from an ultraviolet light-emitting diode (UV-LED). The UV-LED is accommodated in a housing that has an open end and an ultraviolet-transparent closing end. A portion of the housing adjacent to the closing end contacts to-be-treated liquid, ultraviolet rays generated from the UV-LED are irradiated to the to-be-treated liquid, and the housing is cooled by the to-be-treated liquid. In this way, the heat generated from the UV-LED can be cooled with a simple construction without use of arrangements for introducing dedicated cooling fluid for cooling the UV-LED. A heat discharge block for discharging to the outside the heat generated from the UV-LED may be provided at or adjacent to the open end of the housing. Further, the present invention may be constructed in such a manner that a portion of the discharge section directly contacts the to-be-treated liquid.

A light emitting device including a first LED sub-unit, a second LED sub-unit disposed under the first LED sub-unit, a third LED sub-unit disposed under the second LED sub-unit, a first ohmic electrode interposed between the first LED sub-unit and the second LED sub-unit, and in ohmic contact with the first LED sub-unit, a second ohmic electrode interposed between the second LED sub-unit and the third LED sub-unit, and in ohmic contact with the second LED sub-unit, a third ohmic electrode interposed between the second ohmic electrode and the third LED sub-unit, and in ohmic contact the third LED sub-unit, a plurality of electrode pads disposed on the first LED sub-unit, in which at least one of the first ohmic electrode, the second ohmic electrode, and the third ohmic electrode has a patterned structure.

A method of producing a wavelength converting member is provided. The method includes forming a quantum dot layer on a bottom organic layer, and forming a top organic layer on the quantum dot layer. The quantum dot layer includes quantum dots. A moisture vapor transmission rate of the top organic layer and the bottom organic layer is at least 0.006 g/(m.sup.2.Math.day) and less than 9 g/(m.sup.2.Math.day).

An ultraviolet curing device and a control method thereof. The device comprises an ultraviolet light source and a controller connected by means of a cable. The ultraviolet light source is a water-cooled ultraviolet light source or an air-cooled ultraviolet light source. The controller is provided inside or outside of the ultraviolet light source. The ultraviolet light source comprises a shell (101), a copper substrate (103), multiple paths of LED chips (104), and a cooling assembly. The controller comprises a constant-current circuit board (105). The constant-current circuit board (105) performs multi-path constant-current control on the multiple paths of LED chips (104) to monitor anomaly of the voltage drop of the multiple paths of LED chip (104)s, thereby achieving control of the multiple paths of LED chips (104).

The present inventive concept relates to a thermal radiation body for cooling a heating element, which includes a pattern unit including a pore part provided as an empty space or filled with a gas phase and a cover part covering the pore part and dissipates heat of the heating element through heat radiation.

An LED curing apparatus comprising at least one LED radiation source mounted on an LED mount; a housing comprising at least one air inlet; at least one finned heat sink; and at least one air passage through the housing from the or each air inlet through the or each finned heat sink to at least one air outlet; wherein the housing comprises an inlet cavity below the or each finned heat sink and an outlet cavity above the or each finned heat sink to maintain a higher air pressure below the or each finned heat sink and a lower air pressure above the or each finned heat sink.

An LED curing apparatus cooling system comprising at least one LED mount for mounting a plurality of LEDs; at least one bore in the LED mount; at least one thermal transfer member comprising an evaporator section and a condenser section, wherein the or each thermal transfer member is removably connected to a bore; and wherein each thermal transfer member comprises a collar having an outer surface to mate with an inner surface of a bore.