Particulate water-activatable luminescent materials

Patent metadata

Field	Value
Publication number	US-10107489-B2
Application number	US-201515509100-A
Country	US
Kind code	B2
Filing date	Aug 28, 2015
Priority date	Sep 9, 2014
Publication date	Oct 23, 2018
Grant date	Oct 23, 2018

Abstract

The invention provides a water-activatable luminescent particulate material ( 1 ) comprising particles ( 100 ), wherein each particle ( 100 ) comprises a solid state light source ( 10 ) functionally coupled with a water-activatable battery ( 20 ) and a water absorbing shell ( 120 ) enclosing at least part of the water-activatable battery ( 20 ). The invention also provides a luminescent particulate material spray device comprising a container configured to host the water-activatable luminescent particulate material.

First claim

The invention claimed is:

1. A water-activatable luminescent particulate material comprising particles, wherein each particle comprises a solid state light source functionally coupled with a water-activatable battery, and a water absorbing shell enclosing at least part of the water-activatable battery.

2. The water-activatable luminescent particulate material according to claim 1 , wherein the shell is light transmissive.

3. The water-activatable luminescent particulate material according to claim 1 , wherein one or more particles comprise a plurality of water-activatable batteries arranged in series functionally coupled with the solid state light source, or wherein one or more particles comprise a step-up converter functionally coupled with the solid state light source and the water-activatable battery.

4. The water-activatable luminescent particulate material according to claim 1 , wherein the particles have dimensions selected from the range of 50 μm-50 mm.

5. The water-activatable luminescent particulate material according to claim 1 , wherein the particles have dimensions selected from the range of 100-500 μm.

6. The water-activatable luminescent particulate material according to claim 1 , wherein one or more particles comprise a stack, the stack comprising a p-n junction diode, with a p-type part electrically connected to a first battery electrode and with the n-type part electrically connected to a second battery electrode, wherein the first battery electrode comprises magnesium and wherein the second battery electrode comprises one or more of AgCl, CuCl, PbCl 2 , Cu 2 I 2 , CuSCN and MnO 2 .

7. A luminescent particulate material spray device comprising a container configured to host the water-activatable luminescent particulate material as defined in claim 1 , a spray opening to provide a spray of luminescent particulate material, and one or more of a fluid to propel the luminescent particulate material via the spray opening out of the spray device and an inlet for such fluid.

8. The spray device according to claim 7 , further comprising an aqueous liquid contained in the spray device separately from the water-activatable luminescent particulate material.

9. The spray device according to claim 7 , wherein the spray device is configurable on a fire hose nozzle for use of at least part of the extinguishing material that is transported through the fire hose nozzle during use of the fire hose as fluid to propel the luminescent particulate material.

10. The spray device according to claim 7 , comprising a first container and a second container, each configured to host the water-activatable luminescent particulate material, wherein a first water-activatable luminescent particulate material in said first container is configured to provide luminescence upon contact with water having a first spectral distribution, and wherein a second water-activatable luminescent particulate material in said second container is configured to provide luminescence upon contact with water having a second spectral distribution, wherein the spectral distributions differ, and wherein the spray device is configured to spray the water-activatable luminescent particulate material wherein during spraying the content of first water-activatable luminescent particulate material and second water-activatable luminescent particulate material in the spray varies over time.

11. Use of the luminescent particulate material according to claim 1 or the spray device in an emergency situation.

12. The use according to claim 11 , to find or mark an object, human or animal in a situation of reduced daylight.

13. The use according to claim 11 , to mark a route in a building.

14. The use according to claim 13 , wherein a marking is provided with varying spectral distributions over the length of the marking, and wherein the marking is made to indicate a direction.

Assignees

• Philips Lighting Holding Bv

Inventors

• Van Grunsven Eric Cornelis Egbertus
• De Samber Marc Andre
• Jacobs Egbertus Reinier
• Janssen Esther Anna Wilhelmina Gerarda

Classifications

• F21Y2115/10

  Light-emitting diodes [LED] · CPC title

• A62B3/00 Primary

  Devices or single parts for facilitating escape from buildings or the like, e.g. protection shields, protection screens; Portable devices for preventing smoke penetrating into distinct parts of buildings (A62B1/00 takes precedence) · CPC title

• F21L4/02

  characterised by the provision of two or more light sources · CPC title

• B05B7/1481

  Spray pistols or apparatus for discharging particulate material · CPC title

• F21V23/0414

  specially adapted to be used with portable lighting devices · CPC title