Violet-Blue Visible Light Sterilization Device

Patent metadata

Field	Value
Publication number	US-2026048160-A1
Application number	US-202519370885-A
Country	US
Kind code	A1
Filing date	Oct 28, 2025
Priority date	May 4, 2023
Publication date	Feb 19, 2026
Grant date	—

Abstract

A sterilization device includes at least one flexible sheet; a plurality of violet-blue visible light light-emitting diodes (LEDs) at least partially or fully embedded in or attached to the at least one flexible sheet; and a housing having at least one reflective surface into which the at least one flexible sheet is insertable.

First claim

What is claimed is:

1 . A sterilization device, comprising:
at least one flexible sheet; a plurality of violet-blue visible light light-emitting diodes (LEDs), wherein each LED is fully embedded in the at least one flexible sheet; and a housing having at least one reflective surface into which the at least one flexible sheet is insertable.

2 . The sterilization device according to claim 1 , comprising an array of violet-blue LEDs having a wavelength of about 400 to about 420 nm.

3 . The sterilization device according to claim 1 , comprising an array of violet-blue LEDs having a wavelength of about 405 nm.

4 . The sterilization device according to claim 1 , wherein the at least one flexible sheet comprises a silicone sheet.

5 . The sterilization device according to claim 4 , wherein the silicone sheet has a thickness of about 0.1 to about 1 mm.

6 . The sterilization device according to claim 1 , wherein the housing comprises a MYLAR® bag.

7 . The sterilization device according to claim 1 , further comprising a circuit board structure comprising a plurality of metal strips, each strip attached at one end to a positive voltage supply rail and at an opposing end to negative ground power rail, wherein two or more violet-blue LEDs are affixed or attached to each metal strip.

8 . The sterilization device according to claim 7 , wherein the metal strips comprise aluminum.

9 . The sterilization device according to claim 7 , wherein the plurality of metal strips is configured so that a back or rear surface of each strip is exposed to the air within the sterilization device.

10 . The sterilization device according to claim 1 , wherein the violet-blue LEDs are connected via a wire mesh.

11 . The sterilization device according to claim 1 , further comprising at least one fan and at least one air vent.

12 . The sterilization device according to claim 1 , further comprising at least one rechargeable battery.

13 . The sterilization device according to claim 1 , wherein the device weights about 1 pound to about 5 pounds.

14 . The sterilization device according to claim 1 , wherein the at least one flexible sheet comprising the plurality of violet-blue visible light LEDs is folded into two layers and is configured so that a number of LEDs face each other and a space is formed between the two layers for an object to be sterilized.

15 . The sterilization device according to claim 1 , further comprising a reflective or mirrored sheet or coating embedded in the at least one flexible sheet.

16 . The sterilization device according to claim 1 , wherein the at least one flexible sheet has a plurality of elements, with one violet-blue LED mounted on and/or attached to each element.

17 . The sterilization device according to claim 1 , wherein each LED has its own heat sink comprising a body having at least one projection or fin extending outwardly from the body.

18 . The sterilization device according to claim 17 , wherein the heat sink comprises two or more projections or fins extending outwardly from the body.

19 . The sterilization device according to claim 17 , comprising at least two separate layers, each layer comprising at least one flexible sheet and a plurality of violet-blue visible light LEDs, wherein the at least two separate sheets are configured so that the respective LEDs face each other and a space is formed between the at least two separate layers for an object to be sterilized.

20 . A method for sterilizing an object, comprising:
placing or wrapping an object in need of sterilization in the device according to claim 1 ; and applying violet-blue visible light from the violet-blue visible light LEDs to the object for a set amount of time, thereby sterilizing the object by reducing or eliminating bacteria or viruses on the object, wherein the object in need of sterilization comprises at least one surgical instrument, wherein the radiant exposure is about 180 J/cm 2 to about 300 J/cm 2 .

Assignees

• Us Gov Sec Army
• Us Navy

Inventors

• Pierce Bradley T
• Pierce Lisa M
• Brill Jason B

Classifications

• A61L2202/16

  Mobile applications, e.g. portable devices, trailers, devices mounted on vehicles · CPC title

• A61L2202/14

  Means for controlling sterilisation processes, data processing, presentation and storage means, e.g. sensors, controllers, programs · CPC title

• A61L2202/11

  Apparatus for generating biocidal substances, e.g. vaporisers, UV lamps · CPC title

• A61L2103/15

  Laboratory, medical or dentistry appliances, e.g. catheters or sharps · CPC title

• A61L2/084 Primary

  Visible light · CPC title