US 10,501,342 B2Granted

UV-C water purification device

AssigneeSignify Holding B.V.

InventorsDaiyu Hayashi, Jianghong Yu, Paul Dijkstra, Michiel Van Der Meer, Arie Jan Hovestad

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Abstract

Methods and apparatus are provided for ultraviolet (UV) water purification, comprising UV-C LED modules having improved light extraction efficiency. UV-C LED dies (12) are solidly coupled to associated translucent output windows (14), such that light is transmitted directly from light-emitting surface(s) of the dies (12) to output window(s) (14) of the LED package—without propagation across interstitial air gaps. Gas-to-solid (and solid-to-gas) light transition boundaries are thus eliminated, significantly reducing the amount of light lost through inter-medium boundary reflection, and thereby increasing efficiency of light extraction.

Claims7

Dependent claims

A UV-C water purification device, comprising:

one or more UV-C LED modules for administering UV-C light to a body of water, each module comprising:
one or more UV-C LED dies, each die having a bottom surface and a top surface, and
one or more UV-C-translucent window elements,
wherein each of the UV-C LED dies is at least partly embedded in a UV-C-translucent window element, and wherein each of the UV-C LED dies is solidly coupled against an associated UV-C-translucent window element, such that at least one of the bottom or top surfaces of the UV-C die is in optical communication with the associated UV-C-translucent window element, and wherein the one or more UV-C-translucent window elements comprise electrical tracks for delivering current to one or more terminals of the one or more UV-C LED dies, and wherein the one or more UV-C-translucent window elements is for transferring heat from the one or more UV-C LED dies,
wherein the UV-C water purification device further comprises a sealing layer disposed over either the top or bottom surface of the or each UV-C LED die, the sealing being UV-C light reflective.

2 more elements

Dependencies are inferred from the claim text.

Facts

Application: 15/559,280Filed 10 Mar 2016
Priority: EP 1516001720 Mar 2015
Published: US 2018/0086649 A129 Mar 2018
Granted: 10 Dec 2019
Term ends: Not estimatedThe source records don’t support an estimate.

Classification12 codes

C02F 1/325
With ultraviolet light: irradiation devices or lamp constructions
C02F 2201/3222
Lamp arrangement: units using UV-light emitting diodes [LED]
C02F 2201/3227
Lamp arrangement: units with two or more lamps
C02F 2201/3228
Lamp arrangement: units having reflectors, e.g. coatings, baffles, plates, mirrors

Family

US 2018/0086649 A1Pre-grant publication · published 29 Mar 2018
US 10,501,342 B2This patent

From the US filing history. Foreign family members aren’t listed.

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