Advanced control of imitation candle devices
View Patent ↗The disclosed embodiments relate to devices and methods for facilitating the operations and usage of electronic candle devices. In one exemplary aspect, an imitation candle device is disclosed. The imitation candle device comprises a body; a flame element protruding from top of the body; one or more light sources providing illumination for the flame element to produce an appearance of a true fire flame; a tapered chamber with an opening; a sensor component positioned at an end of the tapered chamber, the sensor component operable to produce an electrical signal in response to an input signal; and an electronic control circuitry coupled to the power supply operable to: receive the electrical signal, classify the electrical signal into a category among a plurality of categories, and control at least an output of the one or more light sources based on the electrical signal and the category of the electrical signal.
1. An imitation candle device, comprising:
a body;
a flame element protruding from top of the body;
one or more light sources providing illumination for the flame element to produce an appearance of a true fire flame;
a tapered chamber with an opening, wherein the opening is flush with respect to a top surface of the body and positioned in proximity to the flame element;
a sensor component positioned at an end of the tapered chamber, the sensor component operable to produce an electrical signal in response to an acoustic signal, a blow of air, or a vibration;
a power supply; and
an electronic control circuitry coupled to the power supply and to the sensor component operable to:
receive the electrical signal produced in response to the acoustic signal, a blow of air, or vibration,
classify the electrical signal into a category among a plurality of categories, and
control at least an output of the one or more light sources based on the electrical signal and the category of the electrical signal.
2. The imitation candle device of claim 1 , wherein the sensor component includes an air flow sensor.
3. The imitation candle device of claim 1 , wherein the sensor component includes a sound sensor.
4. The imitation candle device of claim 1 , wherein the sensor component includes microphone.
5. The imitation candle device of claim 1 , wherein the plurality of categories includes a category of vibration, a category of sound, and a category of a blow of air.
6. The imitation candle device of claim 1 , wherein the electronic control circuitry is operable to change a movement of the flame element based on the electrical signal and the category of the electrical signal.
7. The imitation candle device of claim 1 , further comprising a waveform generator implemented at least partially in electronic circuitry to produce an electrical waveform based on the electrical signal.
8. The imitation candle device of claim 7 , wherein the electronic control circuitry includes a waveform detection unit operable to classify the electrical waveform.
9. The imitation candle device of claim 8 , wherein the waveform detection unit includes a low-voltage detection unit operable to detect a voltage level that is below a predetermined threshold and to indicate whether the electrical signal is produced in response to the vibration.
10. The imitation candle device of claim 1 , wherein the electronic control circuitry is operable to control at least an output of the one or more light sources by comparing an amplitude of the electrical signal with at least two predetermined threshold values.
11. The imitation candle device of claim 10 , wherein the electronic control circuitry is operable to turn off one or more light sources upon determining that the amplitude of the electrical signal is larger than a first predetermined threshold of the two predetermined threshold values.
12. The imitation candle device of claim 10 , wherein the electronic control circuitry is operable to modify a flickering speed of the one or more light sources upon determining that the amplitude of the electrical signal is smaller than the first predetermined threshold but lager than a second predetermined threshold of the two predetermined threshold values.
13. The imitation candle device of claim 12 , wherein the flickering speed is linearly correlated to the amplitude of the electrical signal.
14. The imitation candle device of claim 7 , wherein the electronic control circuitry is operable to control at least an output of the one or more light sources by comparing the electrical waveform with one or more voice control commands.
15. The imitation candle device of claim 7 , wherein the electronic control circuitry is operable to control a movement of the flame element by comparing the electrical waveform with one or more voice control commands.
16. The imitation candle device of claim 14 , further comprising a recording component operable to record the one or more voice control commands and store the one or more voice commands in a memory device.
17. A method of controlling an imitation candle device, comprising:
producing an analog electrical signal in response to detection of a perturbation by a sensor component of the imitation candle device,
converting the analog electrical signal to a digital signal,
processing the digital signal to categorize the digital signal into a particular category of events based on a plurality of parameters of the digital signal, and
controlling at least an output of one or more light sources of the imitation candle device based on the digital signal and the category of the digital signal.
18. The method of claim 17 , wherein the perturbation is one of a sound, a vibration, or a blow of air.
19. The method of claim 17 , wherein the processing of the digital signals includes:
detecting an voltage level that is received by a control circuitry of the imitation candle device;
classifying the digital signal into a vibration category of events upon determining that the input voltage level is substantially lower than a voltage level of a power source of the imitation candle device;
determining, upon a detection that the input voltage level is substantially similar to the voltage level of the power source, whether a current cycle of the digital signal is from a blow-off action based on the parameters of the digital signal; and
classifying the digital signal into either a blow-off category or a sound category of events.
20. The method of claim 19 , wherein the classifying the digital signal into either a blow-off category or a sound category of events includes:
incrementing a counter to count a number of cycles of the digital signal that form a valid blow-off signal,
classifying the digital signal into a blow-off category of events upon determining that the counter is larger than a predetermined threshold value within a predetermined time interval, and
classifying the digital signal into a sound category of events upon determining that the counter is smaller than the predetermined threshold value within the predetermined time interval.
21. The method of claim 20 , wherein the predetermined threshold value is in a range of five to twenty.
22. The method of claim 20 , wherein the predetermined time interval is in a range of 50 to 200 ms.
23. The method of claim 17 , wherein the parameters of the digital signal include:
a high amplitude signal duration of a cycle of the digital signal; and
a low amplitude signal duration of a cycle of the digital signal.
24. The method of claim 23 , wherein the parameters further include a frequency of the digital signal and an maximal amplitude of the digital signal.
25. The method of claim 19 , wherein the determining whether a current cycle of the digital signal is from a blow-off action comprises:
determining whether a high amplitude signal duration is within a first predetermined range; and
determining whether a low amplitude signal length is within a second predetermined range.
26. The method of claim 25 , wherein the first predetermined range is between 2 ms to 300 ms.
27. The method of claim 25 , wherein the second predetermined range is between 1.5 ms to 10 ms.
28. The method of claim 17 , wherein the controlling includes:
turning off the one or more light sources of the imitation candle device upon determining that the digital signal is in the blow-off category and an amplitude of the digital signal exceeds a first amplitude threshold.
29. The method of claim 28 , wherein the controlling includes:
changing a flickering speed of the one or more light sources upon determining that:
the digital signal is classified in the blow-off category, and
the amplitude of the digital signal is smaller than the first amplitude threshold and bigger than a second amplitude threshold.
30. The method of claim 29 , wherein the controlling further includes:
controlling the flickering speed, wherein the flickering speed has a linear relationship with respect to the amplitude of the digital signal.
31. The method of claim 17 , wherein the controlling includes:
switching the one or more light sources of the imitation candle device to a particular mode of operation upon determining that the digital signal is in the sound category and the digital signal matches a voice control command indicative of the particular mode of operation.