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1. WO2019025763 - LIQUID DISPENSING SYSTEM CREATING AND MAINTAINING A PERSONALISED BUBBLE WITH A DEFINED RADIUS AND CONCENTRATION

Note: Text based on automatic Optical Character Recognition processes. Please use the PDF version for legal matters

CLAIMS:

1 . A method of creating and maintaining a personalised bubble of scent, the method comprising:

providing a wearable device comprising a perfume reservoir, a perfume dispenser coupled to the scent reservoir, and a controller to dispense a volume of perfume from the wearable device at intervals;

controlling said wearable device to dispense a pulse volume of perfume from said scent reservoir at a pulse interval; and

determining said pulse volume and said pulse interval to maintain a mass per unit volume concentration of said perfume above a threshold level within a defined radius from said wearable device.

2. A method as claimed in claim 1 wherein said threshold level is an average human nasal detection threshold for the scent.

3. A method as claimed in claim 1 or 2 wherein said controlling comprises controlling to maintain said concentration at greater than said threshold level at a radius r from said wearable device, where said concentration is determined from a minimum over time, t, or from an integral over time, t, of C(r, t) where


where M is a mass of scent material per pulse volume, D represents a mass diffusivity of the scent, and f() is a function representing diffusion of the scent in 3D space.

4. A method as claimed in claims 1 , 2 or 3 further comprising using said perfume substantially undiluted in said perfume reservoir,

5. A method as claimed in any preceding claim wherein said radius is less than 100cm and wherein said pulse volume is less than 1 nanolitre.

6. A method as claimed in any preceding claim further comprising providing a wearable device comprising a plurality of perfume reservoirs; providing a user interface to enable a user to control the scent; and in response to user scent control data from the user interface selecting one or more perfume reservoirs from the plurality of perfume reservoirs and/or controlling a pulse volume and/or pulse interval for the selected reservoir(s).

7. A method as claimed in any preceding claim further comprising providing a wearable device comprising a plurality of perfume reservoirs holding different perfume ingredients, and using different pulse volumes and/or pulse intervals to control dispensing from the different perfume reservoirs in order to compensate for different respective dispersal rates of the perfume ingredients in the reservoirs.

8. A method, in particular as claimed in any preceding claim, comprising inputting context data relating to a use context of the wearable device; providing the context data to a scent control neural network, wherein the scent control neural network outputs scent control data in response to the context data; and controlling a scent dispensed by a wearable device dependent upon the scent control data.

9. A method as claimed in claim 8 further comprising providing a user interface to enable a user to control the scent, and training the or another neural network using the user scent control data from the user interface and corresponding context data.

10. A non-transitory data carrier carrying processor control code to implement the method of any preceding claim.

1 1 . A wearable device comprising:

a liquid reservoir;

a liquid dispenser coupled to the liquid reservoir; and

a controller to dispense a volume of liquid from the wearable device at intervals; wherein said controller is configured to control said wearable device to dispense a pulse volume of liquid from said liquid reservoir at a pulse interval,

such that said pulse volume and said pulse interval maintain a mass per unit volume concentration of said liquid above a threshold level within a defined radius from said wearable device.

12. A wearable device as claimed in claim 1 1 wherein the wearable device has an acoustic transducer, and wherein the acoustic transducer is coupled to a processor to process a speech signal of a wearer of the wearable device to detect one or more speech characteristics of the wearer and, in response, to provide a signal for the controller to dispense one or more pulses of liquid.

13. A wearable device as claimed in claim 12 wherein the one or more speech characteristics comprise one or more speech characteristics of mania or depression, and wherein processor is configured to process the speech signal to classify the wearer as in a manic or depressive state and in response to provide the signal for the controller to dispense the one or more pulses of liquid.

14. A wearable device as claimed in claim 1 1 , 12 or 13, wherein the liquid is perfume.

15. A wearable device as claimed in claim 14 comprising a plurality of the liquid reservoirs, wherein the device has a user interface to enable a user to control the scent; and wherein the device is configured to, in response to user scent control data from the user interface, select one or more liquid reservoirs from the plurality of liquid reservoirs and/or control a pulse volume and/or pulse interval for the selected liquid reservoir(s).

16. A wearable device as claimed in claim 14 or 15 comprising a plurality of the liquid reservoirs for holding different perfume ingredients, and wherein the device is configured to use different pulse volumes and/or pulse intervals to control dispensing from the liquid reservoirs in order to compensate for different respective dispersal rates of perfume ingredients in the liquid reservoirs.

17. A wearable device as claimed in any one of claims 1 1 to 16 wherein the wearable device includes, or is coupled to, a dispensing control neural network

configured to receive context data relating to a use context of the wearable device, wherein the dispensing control neural network is further configured to output dispensing control data in response to the context data, for controlling a liquid dispensed by a wearable device dependent upon the dispensing control data.

18. A wearable device comprising:

a plurality of perfume reservoirs each for a respective perfume or perfume ingredient;

at least one dispenser coupled to the perfume reservoirs; and

a controller to dispense perfume or a perfume ingredient from the wearable device at intervals;

wherein the controller is configured to control the wearable device to dispense a pulse volume of the perfume or perfume ingredient from each perfume reservoir at a respective pulse interval.

19. A wearable device as claimed in claim 18 wherein the device has a user interface to enable a user to control the scent; and wherein the device is configured to, in response to user scent control data from the user interface, select one or more reservoirs from the plurality of reservoirs and/or control a pulse volume and/or pulse interval for the selected reservoir(s).

20. A wearable device as claimed in claim 18 or 19 and wherein the device is configured to use different pulse volumes and/or pulse intervals to control dispensing from the reservoirs in order to compensate for different respective dispersal rates of perfume ingredients in the reservoirs

21 . A wearable device as claimed in claim 18, 19 or 20 wherein the wearable device includes, or is coupled to, a scent control neural network; wherein the scent control neural network is configured to receive context data relating to a use context of the wearable device and in response to output scent control data for controlling a scent dispensed by a wearable device.

22. A method of calming a person, the method comprising:

providing the person with a wearable device comprising a liquid reservoir, a liquid dispenser coupled to the liquid reservoir, and a controller to dispense a volume of liquid from the wearable device at intervals;

capturing speech data from the person as the person is speaking;

processing the captured speech data to detect one or more characteristics of the speech and, in response, to the detected characteristic:

controlling said wearable device to dispense a pulse volume of liquid from said liquid reservoir at pulse intervals; and

controlling said pulse volume and said pulse interval to maintain a mass per unit volume concentration of said liquid above a threshold level within a defined radius from said wearable device.

23. A method as claimed in claim 22 comprising processing the captured speech data to detect a state of mania or depression in the person from a voice of the person, and creating and maintaining the personalised bubble of liquid in response to the detected state of mania or depression.

24. A method as claimed in claim 22 or 23 wherein said controlling comprises controlling to maintain said concentration at greater than said threshold level at a radius r from said wearable device, where said concentration is determined from a minimum over time, t, or from an integral over time, t, of C(r, t) where


where M is a mass of liquid per pulse volume, D represents a mass diffusivity of the scent, and f() is a function representing diffusion of the liquid in 3D space.

25. A non-transitory data carrier carrying processor control code to implement the method of any one of claims 22-24.

26. A method as claimed in claim 8 or 9 or wearable device as claimed in claim 17 or 21 , wherein the context data comprises music data identifying or classifying music currently heard by a wearer of the wearable device.