Patent Application
20130020962
[Not Applicable]
[Not Applicable]
[Not Applicable]
Generally, the present application relates to flameless candle circuits. Particularly, the present application relates to flameless candle circuits that cause light emitting diode(s) (“LED”) to generate light in two or more different modes.
Flameless candles may include a circuit (e.g., one or more circuits or sub-circuits) that drives one or more LEDs to generate light. Such a circuit may cause an LED to flicker, thereby creating an illusion of a flickering flame. The circuit may also include a timer that can automatically turn the LED off after a period of time. The timer may also turn the LED back on after another period of time.
The circuit 100 generally operates in the following manner. The ASIC 130 has an output that intermittently provides a current through the resistor 160 and the LED 150. The current causes the LED 150 to emit light. By pulsing the current, it is possible to cause the LED 150 to flicker. An oscillator 140 regulates the timing functions of the ASIC 130. The ASIC 130 has an input that can be high or low. Depending on the state of the input, the ASIC 130 operates in two modes. One mode constantly drives the LED 150 causing it to flicker. The other mode drives the LED 150 for a period of time and then stops. After another period of time, the ASIC 130 will again drive the LED 150 and the cycle will repeat.
Power to the circuit 100 is provided by the battery 120. The selected mode of operation is determined by the state of the 2P3T switch 110. The 2P3T switch 110 has three different positions. When the 2P3T switch 110 is in the first position, the circuit 100 is turned off. Specifically, the negative terminal of the battery 120 is disconnected from ground, causing it to float. Consequently, current can no longer flow to through the battery 120 thereby shutting off the power to the ASIC 130.
When the 2P3T switch 110 is in the second position, the circuit 100 is turned on. Specifically, the negative terminal of the battery 120 is connected to ground, thereby allowing current to flow through the battery and provide power to the ASIC 130. Furthermore, the ASIC 130 is configured to provide a signal through the output to flickeringly drive the LED 150. Additionally, a high signal is applied to the input of the ASIC 130. This causes the ASIC 130 to recognize that a timer should be implemented. Accordingly, the ASIC 130 will shut off the LED 150 after a period of time and then back on after another period of time.
When the 2P3T switch 110 is in the third position, the circuit 100 is turned on. Specifically, the negative terminal of the battery 120 is connected to ground, thereby allowing current to flow through the battery and provide power to the ASIC 130. Furthermore, the ASIC 130 is configured to provide a signal through the output to flickeringly drive the LED 150. Additionally, a low signal is applied to the input of the ASIC 130 (for example, there may be a pull-down resistor on the input line). This causes the ASIC 130 to recognize that no timer should be implemented. Accordingly, the ASIC 130 will constantly and flickeringly drive the LED 150.
The circuit 100, however, requires the relatively expensive 2P3T switch 110. In addition to the part cost, the 2P3T switch 110 requires relatively complex wiring, thereby increasing material costs again. Furthermore, such a component may take up more space on a printed-circuit board or in other dimensions. Therefore, a simplified, compact, and less-expensive circuit is needed.
According to embodiments of the present invention, a flameless candle circuit includes an ASIC having a first power terminal, a second power terminal, and an output. The circuit also includes an LED and a single-pole switch. The LED is configured to receive a signal from the output of the ASIC. The single-pole switch is configured to selectively provide a battery voltage to at least one of the first power terminal and the second power terminal. Additionally, the single-pole switch is configured to remove the battery voltage from both of the first power terminal and the second power terminal to turn the ASIC off. The ASIC is configured to drive the LED in a first mode when the battery voltage is provided to the first power terminal. The ASIC is also configured to drive the LED in a second mode when the battery voltage is provided to the second power terminal.
The ASIC may be configured to constantly provide a flickering signal to the LED in the first mode. The ASIC may also be configured to intermittently provide a flickering signal to the LED according to a slow timer in the second mode. One example of a slow timer is a repeating 24-hour cycle timer. Using such a timer, the ASIC may provide a flickering signal for 5 hours and turn off the flickering signal for 19 hours during one cycle of the repeating 24-hour cycle.
The ASIC may also be configured to drive the LED in a third mode when the battery voltage is provided to both the first power terminal and the second power terminal. In the third mode, the ASIC may intermittently provide a signal to the LED according to a fast timer. For example, the ASIC may cause the LED to blink for a predetermined number of times (e.g., 5 times) during a predetermined period of time (e.g., 5 seconds) such that an accuracy of the slow timer can be determined.
The single-pole switch may be a single-pole, triple-throw switch including three positions. When in the first position, the single-pole switch may be configured to provide the battery voltage to the first power terminal but not the second power terminal of the ASIC. When in the first position, the single-pole switch may be configured to provide the battery voltage to second first power terminal but not the first power terminal of the ASIC. When in the first position, the single-pole switch may be configured to remove the battery voltage from the first power terminal and the second power terminal of the ASIC.
The single-pole switch may be a slide switch. The single-pole switch may have an input terminal configured to receive the battery voltage, a first output terminal electrically connected to the first power terminal of the ASIC, and a second output terminal electrically connected to the second power terminal of the ASIC.
According to embodiments of the present invention, method for operation of a flameless candle circuit includes operating an ASIC in a first manner by using a single-pole switch to apply a battery voltage to a first power terminal of the ASIC, and remove the battery voltage from a second power terminal of the ASIC. When operating in the first manner, the LED is driven in a first mode. The method also includes operating the ASIC in a second manner by using the single-pole switch to apply the battery voltage to the second power terminal of the ASIC and remove the battery voltage from the first power terminal of the ASIC. When operating in the second manner, the LED is driven in a second mode. The method further includes turning off the flameless candle circuit by using the single-pole switch to remove the battery voltage from the first power terminal of the ASIC, and remove the battery voltage from the second power terminal of the ASIC.
As discussed above in the flameless candle circuit embodiments, the ASIC may be configured to constantly provide a flickering signal to the LED in the first mode. The ASIC may also be configured to intermittently provide a flickering signal to the LED according to a slow timer in the second mode. One example of a slow timer is a repeating 24-hour cycle timer. Using such a timer, the ASIC may provide a flickering signal for 5 hours and turn off the flickering signal for 19 hours during one cycle of the repeating 24-hour cycle.
According to an embodiment, the method further includes operating the ASIC in a third manner by applying the battery voltage to both the first power terminal and the second power terminal of the ASIC. In this embodiment, the LED is driven in a third mode while operating the ASIC in the third manner. The third mode further may include intermittently providing a signal from the ASIC to the LED according to a fast timer. For example, an LED may be blinked for a predetermined number of times (e.g., 5 times) during a predetermined period of time (e.g., 5 seconds) to determine an accuracy of the slow timer.
According to additional embodiments of the method, the step of operating the ASIC in a first matter includes switching the single-pole, triple-throw switch into a first position. The step of operating an ASIC in a second manner includes switching the single-pole, triple-throw switch into a second position. Additionally, the step of turning off the flameless candle circuit includes switching the single-pole, triple-throw switch into a third position.
According to embodiments of the present invention, a flameless candle circuit includes an ASIC having a first ground terminal, a second ground terminal, and an output. The circuit also includes an LED and a single-pole switch. The LED is configured to receive a signal from the output of the ASIC. The single-pole switch is configured to selectively connect ground to at least one of the first ground terminal and the ground terminal. Additionally, the single-pole switch is configured to disconnect ground from both of the first ground terminal and the second ground terminal to turn the ASIC off. The ASIC is configured to drive the LED in a first mode when ground is connected to the first ground terminal. The ASIC is also configured to drive the LED in a second mode when ground is connected to the second ground terminal.
The ASIC may be configured to constantly provide a flickering signal to the LED in the first mode. The ASIC may also be configured to intermittently provide a flickering signal to the LED according to a slow timer in the second mode. One example of a slow timer is a repeating 24-hour cycle timer. Using such a timer, the ASIC may provide a flickering signal for 5 hours and turn off the flickering signal for 19 hours during one cycle of the repeating 24-hour cycle.
The ASIC may also be configured to drive the LED in a third mode when ground is connected to both the first ground terminal and the second ground terminal. In the third mode, the ASIC may intermittently provide a signal to the LED according to a fast timer. For example, the ASIC may cause the LED to blink for a predetermined number of times (e.g., 5 times) during a predetermined period of time (e.g., 5 seconds) such that an accuracy of the slow timer can be determined.
The single-pole switch may be a single-pole, triple-throw switch including three positions. When in the first position, the single-pole switch may be configured to connect ground to the first ground terminal but not the second ground terminal of the ASIC. When in the first position, the single-pole switch may be configured to connect ground to second first ground terminal but not the first ground terminal of the ASIC. When in the first position, the single-pole switch may be configured to disconnect ground from the first ground terminal and the second ground terminal of the ASIC.
The single-pole switch may be a slide switch. The single-pole switch may have an input terminal connected to ground, a first output terminal electrically connected to the first ground terminal of the ASIC, and a second output terminal electrically connected to the second ground terminal of the ASIC.
According to embodiments of the present invention, method for operation of a flameless candle circuit includes operating an ASIC in a first manner by using a single-pole switch to connect ground to a first ground terminal of the ASIC, and disconnect ground from a second ground terminal of the ASIC. When operating in the first manner, the LED is driven in a first mode. The method also includes operating the ASIC in a second manner by using the single-pole switch to connect ground to the second ground terminal of the ASIC and disconnect ground the battery voltage from the first ground terminal of the ASIC. When operating in the second manner, the LED is driven in a second mode. The method further includes turning off the flameless candle circuit by using the single-pole switch to disconnect ground from the first ground terminal of the ASIC, and disconnect ground from the second ground terminal of the ASIC.
As discussed above in the flameless candle circuit embodiments, the ASIC may be configured to constantly provide a flickering signal to the LED in the first mode. The ASIC may also be configured to intermittently provide a flickering signal to the LED according to a slow timer in the second mode. One example of a slow timer is a repeating 24-hour cycle timer. Using such a timer, the ASIC may provide a flickering signal for 5 hours and turn off the flickering signal for 19 hours during one cycle of the repeating 24-hour cycle.
According to an embodiment, the method further includes operating the ASIC in a third manner by connecting ground to both the first ground terminal and the second ground terminal of the ASIC. In this embodiment, the LED is driven in a third mode while operating the ASIC in the third manner. The third mode further may include intermittently providing a signal from the ASIC to the LED according to a fast timer. For example, an LED may be blinked for a predetermined number of times (e.g., 5 times) during a predetermined period of time (e.g., 5 seconds) to determine an accuracy of the slow timer.
According to additional embodiments of the method, the step of operating the ASIC in a first matter includes switching the single-pole, triple-throw switch into a first position. The step of operating an ASIC in a second manner includes switching the single-pole, triple-throw switch into a second position. Additionally, the step of turning off the flameless candle circuit includes switching the single-pole, triple-throw switch into a third position.
The foregoing summary, as well as the following detailed description of certain embodiments of the present invention, will be better understood when read in conjunction with the appended drawings. For the purposes of illustration, certain embodiments are shown in the drawings. It should be understood, however, that the claims are not limited to the arrangements and instrumentality shown in the attached drawings. Furthermore, the appearance shown in the drawings is one of many ornamental appearances that can be employed to achieve the stated functions of the system.
The circuit 200 generally operates in the following manner. The oscillator 240 regulates the timing functions of the ASIC 230. The ASIC 230 has an output that can provide a signal to the resistor 260 (e.g., current-limiting resistor) and the LED 250. The signal causes a current to flow through the LED 250, which then emits light. The switch 210 may be a single-pole switch. The switch 210 may be a single-pole, triple-throw switch. Other types of single-pole switches are also possible—e.g., double-throw, quadruple-throw, etc. The switch 210 may be a slide switch or another variety.
If the switch 210 is a single-pole, triple-throw switch (as shown in
The input terminal may be electrically connected to the battery 220 and configured to receive a battery voltage. The first output terminal may be electrically connected to VCC1 on the ASIC 230. The second output terminal may be electrically connected to VCC2 on the ASIC 230. The third output terminal may be floating or not connected—e.g., forming an open circuit. The third output terminal may otherwise be connected or arranged to prevent the circuit 200 from operating. Of course, the switch may be arranged differently—e.g., the first output may be connected to VCC2, the second output may be connected to VCC1, etc. Such modifications are within the scope of the present invention.
With such an arrangement, it may be possible to selectively provide the battery voltage to VCC1, VCC2, or to neither of VCC1 and VCC2 (e.g., remove the battery voltage from VCC1 and VCC2) according to the position of the switch 210. When the switch 210 is in the first position, the battery voltage is provided to VCC1 but not to VCC2. The ASIC 230 may receive power through VCC1 and operate in a first manner. When the switch 210 is in the second position, the battery voltage may be provided to VCC2 but not to VCC1. The ASIC 230 may receive power through VCC2 and operate in a second manner. When the switch 210 is in the third position, the battery voltage may be removed from both VCC2 and VCC1. The ASIC 230 may no longer receive power and consequently may cease its operation.
When operating in the first manner, the ASIC 230 may drive the LED 250 in a first mode. The ASIC 230 may drive the LED 250 through its output terminal. In the first mode, the ASIC 230 may constantly provide a flickering signal to the LED. By pulsing the flickering, it is possible to cause the LED 250 to flicker.
The flickering may be caused by rapidly strobing the LED 250 to create different degrees of perceptible light intensity. The different intensities may be strung together to create an illusion of a flickering candle flame. The signal may be a pulse-width modulated (“PWM”) signal created by the ASIC 230. By changing the duty cycle of the PWM signal, different apparent light intensities from the LED 250 may be achieved—e.g., higher duty cycles result in higher apparent light intensities from the LED 250 and lower duty cycles result in lower apparent light intensities from the LED 250.
When operating in the second manner, the ASIC 230 may drive the LED 250 in a second mode. The ASIC 230 may drive the LED 250 through its output terminal. In the second mode, the ASIC 230 may intermittently provide a flickering signal to the LED. The second mode may be implemented with a slow timer. One example of a slow timer is a timer having a 24-hour full cycle. The full cycle may repeat—one full cycle per 24 hours. During the cycle, the flickering signal may be driven for a first period of time and turned off for a second period of time. The first period of time may be less than the second period of time. The first period of time may be 5 hours, approximately. The second period of time may be 19 hours, approximately.
The ASIC 230 may also be configured to operate in a third manner. For example, the battery voltage may be applied to both VCC1 and VCC2 and the third manner of operation may result. The battery voltage may be applied to VCC1 and VCC2 by a circuit configuration or addition that is not shown in
While operating in the third manner, the ASIC 230 may drive the LED 250 in a third mode. During the third mode, a signal (either flickering or non-flickering) may be provided from the ASIC 230 to the LED 250 using a fast timer. The fast timer may have a full cycle on the order of seconds or minutes and may be relatively fast (compared to the slow timer). The third mode may cause the LED 250 to blink for a predetermined number of times over a predetermined period of time (e.g., 5 blinks in 5 seconds). A user, for example, may count and time the LED 250 to see if an expected number of blinks (e.g., 5 blinks) occur within the predetermined period of time (e.g., 5 seconds). If the counted number of blinks is equal to the predetermined number of blinks during the predetermined period of time, then the slow timer may be deemed to be functioning properly—e.g., having a full cycle of expected duration (e.g., 24-hour full cycle). Otherwise there may be a problem with the accuracy of the slow timer.
The flow begins and at step 310, the flow is routed step 350 if a battery voltage is applied to VCC1. At step 350, the flow is routed to one of steps 360 or 370 according to whether the battery voltage is applied to VCC2. If the battery voltage is not applied to VCC2, then the ASIC operates in a first manner—e.g., as described above in conjunction with circuit 200. If the battery voltage is applied to VCC2, then the ASIC operates in a third manner—e.g., as described above in conjunction with circuit 200.
Going back to step 310, the flow is routed step 320 if the battery voltage is not applied to VCC1. At step 320, the flow is routed to one of steps 330 or 340 according to whether the battery voltage is applied to VCC2. If the battery voltage is applied to VCC2, then the flow proceeds to step 330 at which the ASIC is operated in a second manner—e.g., as described above in conjunction with circuit 200. If the battery voltage is not applied to VCC2, then the flow proceeds to step 340 at which the ASIC is off—e.g., as described above in conjunction with circuit 200.
The circuit 500 generally operates in the following manner. The oscillator 540 regulates the timing functions of the ASIC 530. The ASIC 530 has an output that can provide a signal to the resistor 560 (e.g., current-limiting resistor) and the LED 550. The signal causes a current to flow through the LED 550, which then emits light. The switch 510 may be a single-pole switch. The switch 510 may be a single-pole, triple-throw switch. Other types of single-pole switches are also possible—e.g., double-throw, quadruple-throw, etc. The switch 510 may be a slide switch or another variety.
If the switch 510 is a single-pole, triple-throw switch (as shown in
The input terminal may be electrically connected to the negative terminal of the battery 520 or ground. As used herein, the term “ground” can encompass the negative terminal of the battery, earth ground, signal ground, and/or the like. The first output terminal may be electrically connected to GND1 on the ASIC 530. The second output terminal may be electrically connected to GND2 on the ASIC 530. The third output terminal may be floating or not connected—e.g., forming an open circuit. The third output terminal may otherwise be connected or arranged to prevent the circuit 500 from operating. Of course, the switch may be arranged differently—e.g., the first output may be connected to GND2, the second output may be connected to GND1, etc. Such modifications are within the scope of the present invention.
With such an arrangement, it may be possible to selectively connect ground or the negative terminal of the battery to GND1, GND2, or to neither of GND1 and GND2 according to the position of the switch 510. When the switch 510 is in the first position, ground is connected to GND1 but not to GND2. In this scenario, the ASIC 530 may operate in a first manner. When the switch 510 is in the second position, ground is connected to GND2 but not to GND1. In this scenario, the ASIC 530 may operate in a second manner. When the switch 510 is in the third position, the ground may be disconnected from both GND1 and GND2. In this scenario, the ASIC 530 may no longer receive power and consequently may cease operating.
When operating in the first manner, the ASIC 530 may drive the LED 550 in a first mode. The ASIC 530 may drive the LED 550 through its output terminal. In the first mode, the ASIC 530 may constantly provide a flickering signal to the LED. By pulsing the flickering, it is possible to cause the LED 550 to flicker.
The flickering may be caused by rapidly strobing the LED 550 to create different degrees of perceptible light intensity. The different intensities may be strung together to create an illusion of a flickering candle flame. The signal may be a pulse-width modulated (“PWM”) signal created by the ASIC 530. By changing the duty cycle of the PWM signal, different apparent light intensities from the LED 550 may be achieved—e.g., higher duty cycles result in higher apparent light intensities from the LED 550 and lower duty cycles result in lower apparent light intensities from the LED 550.
When operating in the second manner, the ASIC 530 may drive the LED 550 in a second mode. The ASIC 530 may drive the LED 550 through its output terminal. In the second mode, the ASIC 530 may intermittently provide a flickering signal to the LED. The second mode may be implemented with a slow timer. One example of a slow timer is a timer having a 24-hour full cycle. The full cycle may repeat—one full cycle per 24 hours. During the cycle, the flickering signal may be driven for a first period of time and turned off for a second period of time. The first period of time may be less than the second period of time. The first period of time may be 5 hours, approximately. The second period of time may be 19 hours, approximately.
The ASIC 530 may also be configured to operate in a third manner. For example, the ground may be connected to both GND1 and GND2 and the third manner of operation may result. The ground may be connected to both GND1 and GND2 by a circuit configuration or addition that is not shown in
While operating in the third manner, the ASIC 530 may drive the LED 550 in a third mode. During the third mode, a signal (either flickering or non-flickering) may be provided from the ASIC 530 to the LED 550 using a fast timer. The fast timer may have a full cycle on the order of seconds or minutes and may be relatively fast (compared to the slow timer). The third mode may cause the LED 550 to blink for a predetermined number of times over a predetermined period of time (e.g., 5 blinks in 5 seconds). A user, for example, may count and time the LED 550 to see if an expected number of blinks (e.g., 5 blinks) occur within the predetermined period of time (e.g., 5 seconds). If the counted number of blinks is equal to the predetermined number of blinks during the predetermined period of time, then the slow timer may be deemed to be functioning properly—e.g., having a full cycle of expected duration (e.g., 24-hour full cycle). Otherwise there may be a problem with the accuracy of the slow timer.
The flow begins and at step 610, the flow is routed step 650 if ground is connected to GND1. At step 650, the flow is routed to one of steps 660 or 670 according to whether ground is connected to GND2. If GND2 is not connected to ground, then the ASIC operates in a first manner—e.g., as described above in conjunction with circuit 500. If GND2 is connected to ground, then the ASIC operates in a third manner—e.g., as described above in conjunction with circuit 500.
Going back to step 610, the flow is routed step 620 if ground is not connected to GND1. At step 620, the flow is routed to one of steps 630 or 640 according to whether ground is connected to GND2. If ground is connected to GND2, then the flow proceeds to step 630 at which the ASIC is operated in a second manner—e.g., as described above in conjunction with circuit 500. If ground is not connected to GND2, then the flow proceeds to step 640 at which the ASIC is off—e.g., as described above in conjunction with circuit 500.
While the invention has been described with reference to certain embodiments, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted without departing from the scope of the invention. In addition, many modifications may be made to adapt a particular situation or material to the teachings of the invention without departing from its scope. Therefore, it is intended that the invention not be limited to the particular embodiment disclosed, but that the invention will include all embodiments falling within the scope of the appended claims.
