Vaporization device with lip sensing

1. An apparatus comprising:

a reservoir configured to hold a vaporizable material;

a heater configured to heat the vaporizable material;

a mouthpiece in communication with the reservoir;

a capacitive sensor configured to output capacitance readings, wherein the capacitive sensor comprises a flexible circuit onto which a conductive region is layered; and

a controller configured to perform operations comprising:

regulating a temperature of the heater to a preselected temperature;

obtaining the capacitance readings from the capacitive sensor;

determining a baseline capacitance based on more than one of the capacitance readings;

determining a value based on a difference between a first capacitance reading of the capacitance readings and the baseline capacitance; and

increasing the temperature of the heater based on the value being at or above a threshold.

2. The apparatus of claim 1 , wherein the capacitive sensor is adjacent the mouthpiece.

3. The apparatus of claim 1 , wherein the capacitive sensor comprises a conductor positioned adjacent the mouthpiece.

4. The apparatus of claim 1 , wherein the heater is adjacent the reservoir.

5. The apparatus of claim 1 , wherein the controller is further configured to perform operations comprising:

determining the baseline capacitance based on filtering the capacitance readings.

6. The apparatus of claim 1 , wherein the controller is further configured to perform operations comprising:

determining the baseline capacitance based on a running average of the capacitance readings.

7. The apparatus of claim 1 , wherein the controller is further configured to perform operations comprising:

holding the baseline capacitance at a first baseline value while the capacitance readings are above the baseline capacitance by a first offset value or below the baseline capacitance by a second offset value.

8. The apparatus of claim 7 , wherein the holding the baseline capacitance comprises preventing the baseline capacitance from changing.

9. The apparatus of claim 7 , wherein the first offset value and the second offset value are each based on a percentage of the first baseline value.

10. The apparatus of claim 1 , wherein the determining the value comprises calculating a percent difference between the first capacitance reading and the baseline capacitance.

11. The apparatus of claim 1 , wherein the threshold comprises an indication of a 0.5% change between the first capacitance reading and the baseline capacitance.

12. The apparatus of claim 1 , wherein the threshold comprises an indication of a 1% change between the first capacitance reading and the baseline capacitance.

13. The apparatus of claim 1 , wherein the increasing the temperature of the heater comprises increasing power applied to the heater for a time period that is between 2 seconds and 5 seconds.

14. The apparatus of claim 1 , wherein the increasing the temperature of the heater comprises increasing a duty cycle of power applied to the heater for a time period.

15. The apparatus of claim 1 , wherein the vaporizable material includes one or more of a loose-leaf material, a liquid material, a gel material, and a semi-solid material.

16. The apparatus of claim 1 , wherein the vaporizable material includes one or more of a tobacco solution and a cannabis solution.

17. The apparatus of claim 1 , wherein the mouthpiece is in fluid communication with the reservoir.

18. The apparatus of claim 1 , wherein the difference is at or above the threshold when a lip of a user contacts the mouthpiece.

19. An apparatus comprising:

a reservoir configured to hold a vaporizable material;

a heater configured to heat the vaporizable material;

a mouthpiece in communication with the reservoir;

a capacitive sensor configured to output capacitance readings, wherein the capacitive sensor comprises a flexible circuit onto which a conductive region is layered; and

a controller configured to perform operations comprising:

regulating a temperature of the heater to a first temperature;

obtaining the capacitance readings from the capacitive sensor;

determining a baseline capacitance based on more than one of the capacitance readings;

determining a value based on a difference between a first capacitance reading of the capacitance readings and the baseline capacitance; and

reducing the temperature of the heater to a second temperature that is lower than the first temperature when the value is at or below a threshold for a first predetermined period of time.

20. The apparatus of claim 19 , wherein the capacitive sensor is adjacent the mouthpiece.

21. The apparatus of claim 19 , wherein the capacitive sensor comprises a conductor positioned adjacent the mouthpiece.

22. The apparatus of claim 19 , wherein the heater is adjacent the reservoir.

23. The apparatus of claim 19 , wherein the controller is further configured to perform operations comprising:

determining the baseline capacitance based on filtering the capacitance readings.

24. The apparatus of claim 19 , wherein the controller is further configured to perform operations comprising:

determining the baseline capacitance based on a running average of the capacitance readings.

25. The apparatus of claim 19 , wherein the controller is further configured to perform operations comprising:

holding the baseline capacitance at a first baseline value while the capacitance readings are above the baseline capacitance by a first offset value or below the baseline capacitance by a second offset value.

26. The apparatus of claim 25 , wherein the holding the baseline capacitance comprises preventing the baseline capacitance from changing.

27. The apparatus of claim 25 , wherein the first offset value and the second offset value are each based on a percentage of the first baseline value.

28. The apparatus of claim 19 , wherein the determining the value comprises calculating a percent difference between the first capacitance reading and the baseline capacitance.

29. The apparatus of claim 19 , wherein the first predetermined period of time is twenty seconds.

30. The apparatus of claim 19 , wherein the vaporizable material includes one or more of a loose-leaf material, a liquid material, a gel material, and a semi-solid material.

31. The apparatus of claim 19 , wherein the vaporizable material includes one or more of a tobacco solution and a cannabis solution.

32. The apparatus of claim 19 , wherein the mouthpiece is in fluid communication with the reservoir.

33. The apparatus of claim 19 , wherein the difference is at or below the threshold when there is no user contact with the mouthpiece.

34. An apparatus comprising:

a reservoir configured to hold a vaporizable material;

a heater configured to heat the vaporizable material;

a mouthpiece in communication with the reservoir;

a capacitive sensor configured to output capacitance readings; and

a controller configured to perform operations comprising:

regulating a temperature of the heater to a first temperature;

obtaining the capacitance readings from the capacitive sensor;

determining a baseline capacitance based on more than one of the capacitance readings;

determining a value based on a difference between a first capacitance reading of the capacitance readings and the baseline capacitance;

reducing the temperature of the heater to a second temperature that is lower than the first temperature when the value is at or below a threshold for a first predetermined period of time; and

reducing, when the value remains below the threshold for a second predetermined period of time, the temperature of the heater to a third temperature that is lower than the first temperature and lower than the second temperature.

35. The apparatus of claim 34 , wherein the controller is further configured to perform operations comprising:

powering off the heater when the value remains below the threshold for a third predetermined period of time.

36. The apparatus of claim 35 , wherein the third predetermined period of time is between 2 minutes and 5 minutes.