Aerosol Delivery Device

Abstract

To provide an aerosol provision device.SOLUTION: An aerosol provision device 100 includes: a heater assembly configured to heat aerosol generating material; an indicator assembly 202, 204; and a controller. The controller is configured to cause the heater assembly to heat the aerosol generating material and determine a characteristic of the heater assembly. If the determined characteristic satisfies at least one criterion, the controller is configured to cause the indicator assembly 202, 204 to indicate that the device is ready for use.SELECTED DRAWING: Figure 6

Description

[Technical Field]

[0001] The present invention relates to an aerosol delivery device and a method of operating an aerosol delivery device. [Background technology]

[0002] Smoking articles, such as cigarettes and cigars, burn tobacco during use to produce tobacco smoke. Attempts have been made to provide alternatives to these tobacco-burning articles by creating products that release compounds without combustion. An example of such a product is a heating device that releases compounds by heating a material without burning it. This material may be, for example, tobacco or other non-tobacco products, and may or may not contain nicotine. Summary of the Invention

[0003] According to a first aspect of the present disclosure, there is provided an aerosol delivery device comprising: a heating assembly configured to heat the aerosol-forming material; and an indicator assembly; causing the heating assembly to heat the aerosol-forming material; determining a characteristic of the heating assembly; causing the indicator assembly to indicate that the device is ready for use if the determined characteristic satisfies at least one criterion; a controller configured to: An aerosol delivery device is provided, comprising:

[0004] According to another aspect of the present disclosure, there is provided an aerosol delivery device comprising: a heating assembly configured to heat the aerosol-forming material; and an indicator assembly; a temperature sensor configured to provide an output indicative of the temperature of the heating assembly; causing the heating assembly to heat the aerosol-forming material; receiving an output from a temperature sensor; determining a temperature of the heating assembly based on an output from the temperature sensor; causing the indicator assembly to indicate that the device is ready for use if the determined temperature meets at least one criterion; a controller configured to: An aerosol delivery device is provided, comprising:

[0005] According to a second aspect of the present disclosure, there is provided a method of operating an aerosol delivery device, comprising: causing a heating assembly of the device to heat the aerosol-forming material; determining a characteristic of the heating assembly; If the determined characteristic satisfies at least one criterion, causing an indicator assembly of the device to indicate that the device is ready for use; A method is provided, comprising:

[0006] According to another aspect of the present disclosure, there is provided a method of operating an aerosol delivery device, comprising: causing a heating assembly of the device to heat the aerosol-forming material; determining a temperature of the heating assembly based on an output from the temperature sensor; If the determined temperature meets at least one criterion, causing an indicator assembly of the device to indicate that the device is ready for use; A method is provided, comprising:

[0007] According to a third aspect of the present disclosure, there is provided an aerosol delivery device comprising: an inductor coil for generating a varying magnetic field; a susceptor configured to heat the aerosol-generating material, the susceptor being heatable by penetration of a varying magnetic field; an indicator assembly; causing an inductor coil to begin generating a varying magnetic field; causing the indicator assembly to indicate that the device has completed or is completing operation within a predetermined time after causing the inductor coil to begin heating the aerosol-generating material; a controller configured to: An aerosol delivery device is provided, comprising:

[0008] Further features and advantages of the present invention will become apparent from the following description of preferred embodiments of the invention, given by way of example only and with reference to the accompanying drawings, in which: [Brief explanation of the drawings]

[0009] [Figure 1] FIG. 1 is a front view of an example aerosol delivery device. [Figure 2] FIG. 2 is a front view of the aerosol delivery device of FIG. 1 with the outer cover removed. [Figure 3] 2 is a cross-sectional view of the aerosol delivery device of FIG. 1. [Figure 4] FIG. 3 is an exploded view of the aerosol delivery device of FIG. 2. [Figure 5] Figure 5A is a cross-sectional view of a heating assembly in an aerosol delivery device, and Figure 5B is an enlarged view of a portion of the heating assembly of Figure 5A. [Figure 6] FIG. 2 is a front view of the device. [Figure 7] FIG. 1 is a perspective view of the housing of the device. [Figure 8] FIG. 1 is a perspective view of the device without the housing. [Figure 9] FIG. 1 is a perspective view of an LED disposed within the device. [Figure 10] FIG. 10 illustrates an outer member with multiple openings. [Figure 11] FIG. 1 shows the device components positioned above the LED. [Figure 12] FIG. 1 illustrates a system including a controller, a heating assembly, an input interface, and an indicator assembly. [Figure 13A] FIG. 10 shows an outer member with multiple LEDs lit. [Figure 13B] FIG. 10 shows an outer member with multiple LEDs lit. [Figure 13C] FIG. 10 shows an outer member with multiple LEDs lit. [Figure 13D] FIG. 10 shows an outer member with multiple LEDs lit. [Figure 13E] FIG. 10 shows an outer member with multiple LEDs lit. [Figure 14] FIG. 1 is a flow diagram of a method of operating a device. [Figure 15] FIG. 1 is a flow diagram of a method of operating a device. DETAILED DESCRIPTION OF THE INVENTION

[0010] As used herein, the term "aerosol-generating material" includes materials that volatilize upon heating, typically in the form of an aerosol. Aerosol-generating materials include any tobacco-containing material, such as one or more of tobacco, tobacco derivatives, expanded tobacco, reconstituted tobacco, or tobacco substitutes. Aerosol-generating materials also include other non-tobacco products, which may or may not contain nicotine. Aerosol-generating materials may be in the form of, for example, a solid, liquid, gel, wax, etc. Aerosol-generating materials may also be a combination or blend of materials, for example. Aerosol-generating materials are sometimes known as "smoking materials."

[0011] Devices are known that heat aerosol-forming materials to volatilize at least one component of the aerosol-forming materials, typically forming an inhalable aerosol without burning or combusting the aerosol-forming materials. Such devices may be described as "aerosol-generating devices," "aerosol-delivery devices," "non-combustion heating devices," "tobacco heating product devices," "tobacco heating devices," or the like. Similarly, so-called e-cigarette devices exist that vaporize aerosol-forming materials, typically in liquid form (which may or may not contain nicotine). The aerosol-forming materials may be in the form of, or provided as, a part, such as a rod, cartridge, or cassette that can be inserted into the device. The heater that heats and volatilizes the aerosol-forming materials may be a "permanent" part of the device.

[0012] The aerosol delivery device can accept and heat an article containing an aerosol-forming material. In this context, an "article" is a component that, in use, comprises or contains the aerosol-forming material and is heated to volatilize the aerosol-forming material and, optionally, other components during use. After a user inserts the article into the aerosol delivery device, the aerosol delivery device may be heated to generate an aerosol that is subsequently inhaled by the user. The article may be of a predetermined or specific size, for example, configured to be placed within a heating chamber of a device sized to accept the article.

[0013] A first aspect of the present disclosure provides for an aerosol delivery device comprising a controller configured to: (i) cause a heating assembly to heat an aerosol-generating material; (ii) determine a characteristic of the heating assembly; and (iii) cause an indicator assembly to indicate that the device is ready for use if the determined characteristic meets at least one criterion.

[0014] Thus, the device can measure or monitor a characteristic of the heating assembly and, based on that characteristic, responsively notify the user when the device is ready for use. Thus, the device can notify the user that they can begin using the device. This avoids forcing the user to wait longer than necessary to inhale the aerosol, which can waste the aerosol and reduce customer satisfaction.

[0015] In one particular example, the characteristic is the temperature of the heating assembly. Thus, the controller may determine the temperature of the heating assembly and, in response, cause the indicator assembly to indicate that the device is ready for use if the temperature meets at least one criterion. The temperature of the aerosol-generating material being heated by the heating assembly may depend on the temperature of the heating assembly.

[0016] The temperature may be measured by a temperature sensor. Thus, the device may include a temperature sensor configured to provide an output (e.g., a signal) indicative of the temperature of the heating assembly (e.g., a component of the heating assembly). The controller receives the output from the temperature sensor and determines / calculates the temperature based on the output. If the temperature meets / satisfies a criterion, the controller may cause an indicator assembly of the device to indicate that the device is ready for use.

[0017] Thus, the device can measure or monitor the temperature of the heating assembly and, based on this temperature, respond to the user when the device is ready for use.

[0018] The temperature of the heating assembly may be measured or inferred by other means. For example, the heating assembly may include a susceptor. The susceptor may contain two or more different materials with different Curie temperatures. When a material reaches its Curie temperature (as it is heated), its properties may change. This change in state may be detectable by circuitry within the device. Thus, the controller may determine that the material has reached its Curie temperature without directly measuring the temperature with a more standard temperature sensor.

[0019] "If the determined characteristic meets at least one criterion, causing the indicator assembly to indicate that the device is ready for use" may mean "determining that the characteristic meets at least one criterion, and in response to determining that the characteristic meets the criterion, causing the indicator assembly to indicate that the device is ready for use."

[0020] At least one criterion may be met if the determined temperature is equal to or greater than a threshold temperature. Thus, the user is notified that the device is ready for use only if the temperature exceeds the threshold. This may ensure that the aerosol-generating material has been heated to a minimum temperature at which the aerosol-generating material is deemed to have emitted a sufficient amount / concentration of aerosol. Below this threshold, the aerosol is deemed unsuitable for inhalation.

[0021] The controller may be configured to cause the indicator assembly to indicate that the device is ready for use after a predetermined time has elapsed since the determined temperature was determined to satisfy at least one criterion. During this predetermined time, the temperature of the heating assembly may fluctuate above and below the threshold value as the heating assembly is driven to maintain its temperature. Thus, the temperature may not necessarily be at or above the threshold value. This predetermined time allows time for heat to penetrate the aerosol-generating material. The user may then be notified that the device is ready for use. In one example, the predetermined time is greater than approximately 10 seconds, greater than approximately 15 seconds, or greater than approximately 20 seconds after the heater reaches the threshold temperature.

[0022] In an alternative example, at least one criterion may be met if the determined temperature is at or above a threshold temperature for at least a predetermined time. Thus, the aerosol-generating material may be heated to or above this temperature for a specific length of time. This may ensure that heat has had time to penetrate the aerosol-generating material and generate a larger / higher concentration of aerosol. For example, the aerosol-generating material may still be at a relatively low temperature when the temperature exceeds the threshold. The predetermined time may be greater than approximately 10 seconds, greater than approximately 15 seconds, or greater than approximately 20 seconds after the heater reaches the threshold temperature.

[0023] The heater may be adapted to reach the threshold temperature in less than about 5 seconds, less than about 3 seconds, or less than about 2 seconds after the controller causes the heating assembly to begin heating the aerosol-forming material.

[0024] The threshold temperature may be the "set point" of the heater, i.e., the temperature at which the heater is maintained for at least part of a heating session. There may be different threshold temperatures within a heating session.

[0025] The threshold temperature may be greater than about 240° C., greater than about 250° C., greater than about 260° C., greater than about 270° C., greater than about 280° C., or greater than about 290° C. The threshold temperature may be greater than about 240° C. and less than about 290° C., greater than about 250° C. and less than about 260° C., or greater than about 280° C. and less than about 290° C.

[0026] In some examples, the device is configured to operate in one of a first mode and a second mode, the first mode having different heating characteristics than the second mode, and the threshold temperature is different between the first mode and the second mode. For example, the threshold temperature may be higher in the second mode. In some examples, the predetermined time is the same in both heating modes. In other examples, the predetermined time is different between the first mode and the second mode. For example, the predetermined time may be longer in the first mode due to a potentially lower threshold temperature.

[0027] Thus, the device can operate in two or more different heating modes. In one example, each heating mode can heat the aerosol-forming material to a different temperature and / or for a different length of time. Thus, each heating mode can have different characteristics.

[0028] In one example, the threshold temperature in the first mode is between approximately 240°C and approximately 260°C, and the threshold temperature in the second mode is between approximately 270°C and approximately 290°C.

[0029] The device may also be adapted to operate in other non-heating modes, for example, the device may be adapted to operate in a set mode, the heating mode and the non-heating mode being sometimes more commonly known as modes of operation of the device.

[0030] The first mode may be known as a default mode, and the second mode may be known as a boost mode, which may, for example, produce a larger or more concentrated aerosol than the first mode.

[0031] The characteristic of the heating assembly may be the energy used by the heating assembly. The controller may determine or calculate the energy used by the heater and cause the indicator assembly to indicate that the device is ready for use when the energy used by the heating assembly is equal to or greater than a threshold energy. Thus, this criterion may be met when the determined energy usage is equal to or greater than the threshold energy. For example, the controller may determine when the heating assembly has used more than about 50 J, more than about 60 J, more than about 80 J, more than about 100 J, or more than about 120 J since beginning to heat the aerosol-generating material. By measuring the energy used, the device may not require a temperature sensor, thereby reducing the number of components required for the device.

[0032] The threshold may be a percentage of the total energy used in the heating session. For example, the controller may determine when the heating assembly has used more than about 2%, more than about 3%, more than about 5%, more than about 7%, or more than about 10% of the total energy used in the heating session.

[0033] In some examples, the device further includes an input interface configured to accept input for operating the device. In one example, the input interface is configured to accept input for selecting a heating mode from a plurality of heating modes, including a first mode and a second mode. Thus, a user can select a heating mode by interacting with or manipulating the input interface. The controller detects the input for selecting the heating mode, and in response to detecting the input, determines the selected heating mode based on the input and causes the heating assembly to begin heating the aerosol-generating material according to the selected heating mode. The same input interface may also be used to accept input for selecting a setting mode from a plurality of operating modes. Thus, in some examples, the device begins heating only when the heating mode is selected. This can improve the energy efficiency of the device.

[0034] Preferably, the controller causes the heating assembly to begin heating the aerosol-generating material in accordance with the selected heating mode substantially simultaneously with determining the selected heating mode. For example, these may occur simultaneously. This reduces the amount of time a user must wait before beginning to use the device. In other examples, there may be a slight delay between the above steps, such as less than 1 second, less than 0.5 seconds, less than 0.1 seconds, less than 0.01 seconds, or less than 0.001 seconds.

[0035] In some examples, the indicator assembly indicates that the heating assembly has begun heating the aerosol-generating material, thereby avoiding the user from having to restart operation of the device.

[0036] In one configuration, the indicator assembly includes a visual component configured to indicate when the device is ready for use. For example, the visual component may include an LED, multiple LEDs, a display, an e-ink display, or a mechanical element that moves to display one or more patterns. In some examples, the visual component is configured to emit light.

[0037] In one particular example, the indicator assembly includes multiple LEDs, and the number of LEDs that are lit indicates when the device is ready for use. For example, a first number of LEDs may be lit when the heating assembly first begins heating the aerosol-generating material, and a second number of LEDs may be lit when the device is ready for use, with the second number being greater than the first number. The first number of LEDs may be zero. The second number may be all LEDs. Thus, the indicator assembly can indicate how close the device is to being ready for use. The LEDs may be lit sequentially as the heating assembly heats up. The LEDs may be lit sequentially based on the temperature measured by the temperature sensor.

[0038] In one particular example, there are multiple LEDs, such as four LEDs, that are sequentially turned on based on the temperature of the heating assembly (i.e., as the heating assembly heats up). For example, initially, all four LEDs may be turned off. When the temperature rises above a first threshold, one of the four LEDs may be turned on. When the temperature rises above a second threshold, another LED may be turned on. When the temperature rises above a third threshold, another LED may be turned on, and when the temperature rises above a fourth threshold, all four LEDs may be turned on. The fourth threshold may be equal to the threshold temperature. Thus, when the temperature equals the threshold temperature, all LEDs may be illuminated.

[0039] In another example, there may be multiple LEDs, such as four LEDs, that are sequentially turned on after the controller determines that the temperature is at or above a threshold temperature. For example, initially, all four LEDs may be turned off. One of the four LEDs may be turned on if a first threshold time has elapsed after the controller determines that the temperature is at or above the threshold temperature. The first threshold time may be zero seconds (i.e., an LED may be turned on as soon as the controller determines that the temperature is at or above the threshold temperature). A second LED may be turned on if a second threshold time has elapsed after the controller determines that the temperature is at or above the threshold temperature. A third LED may be turned on if a third threshold time has elapsed after the controller determines that the temperature is at or above the threshold temperature. The last LED may be turned on if a fourth threshold time has elapsed after the controller determines that the temperature is at or above the threshold temperature.

[0040] In another example, the indicator assembly includes a tactile component configured to provide tactile feedback indicating that the device is ready for use. For example, the tactile component may be a tactile motor that vibrates the device when it is ready for use. In some examples, the tactile component provides tactile feedback according to a first pattern after the heating assembly begins heating the aerosol-generating material and according to a second pattern when the device is ready for use. The first pattern may continue until the device is ready for use or may terminate after a short period of time. Thus, the tactile component may also indicate that the device has begun heating the aerosol-generating material, allowing the user to recognize that the device is operating.

[0041] In another example, the indicator assembly includes an audible indicator configured to emit a sound to indicate that the device is ready for use. The audible indicator may be a transducer, a buzzer, a bell, or the like.

[0042] In one particular example, the indicator assembly includes a tactile component and a visual component. The tactile component may be configured to provide a tactile indication that the heating assembly has begun heating the aerosol-generating material. The visual component may be configured to provide a visual indication that the device is ready for use.

[0043] In some examples, the indicator assembly is configured to provide an indication of the time remaining until the device terminates operation. For example, the indicator assembly may provide different indications depending on the time remaining until the device terminates operation. The device may "terminate operation" when power to the heating assembly is removed (i.e., when it is no longer actively heating or maintaining temperature) or when the aerosol temperature / amount is deemed to fall below an acceptable level (which may be several seconds after power to the heating assembly is removed). In one example, the device may "terminate operation" when the temperature of the heating assembly falls below a second threshold.

[0044] In one particular example, the indicator assembly includes multiple LEDs, with the number of lit LEDs indicating the time remaining until the device has finished operating. For example, if the device is operating, a first number of LEDs may be lit, and if the device has finished operating, a second number of LEDs may be lit, where the second number may be less than the first number. The second number may be, for example, zero. The first number may be all of the LEDs. Thus, the LEDs may perform a "countdown" as the device nears completion.

[0045] In one particular example, there are multiple LEDs, such as four LEDs, that are sequentially turned off based on the temperature of the heating assembly (i.e., as the end of the heating session approaches). For example, all four LEDs may be illuminated before the device terminates operation. One of the four LEDs may be turned off when the temperature drops by a first number of degrees. Another LED may be turned off when the temperature drops by a second number of degrees. Another LED may be turned off when the temperature drops by a third number of degrees, and all four LEDs may be turned off when the temperature drops by a fourth number of degrees. The first number of degrees may be approximately 5-10°C below the operating temperature (i.e., threshold temperature) of the heating assembly. The second number of degrees may be approximately 10-20°C below the operating temperature (i.e., threshold temperature) of the heating assembly. The third number of degrees may be approximately 15-30°C below the operating temperature (i.e., threshold temperature) of the heating assembly. The fourth degree may be approximately 20-40° C. below the operating temperature (i.e., threshold temperature) of the heating assembly. The fourth degree may be equal to the second threshold temperature mentioned above.

[0046] In another example, the tactile component may provide different tactile feedback patterns based on the temperature of the heating assembly. For example, the tactile component may provide tactile feedback indicating a decrease in the temperature of the heating assembly (which may indicate time remaining). The type of tactile feedback may indicate how much time is remaining.

[0047] In yet another example, the audible indicator may provide a different sound based on the temperature of the heating assembly (which may indicate time remaining), e.g., the pitch, tone, sound pattern, etc. may change over time.

[0048] In another example, the controller is configured to cause the indicator assembly to indicate when the device has completed or is completing an operation. The indicator assembly may thereby indicate when the device has completed or is completing an operation. For example, the visual indicator may not provide any visual indication when the device has completed an operation. In one particular example, all LEDs may be turned off when the device has completed or is completing an operation, thereby indicating to the user that they should stop inhaling from the device.

[0049] The controller may cause the indicator assembly to indicate that the device has ceased operation or is about to cease operation if the determined temperature satisfies a second criterion. The second criterion may be satisfied if the determined temperature is equal to or less than a second threshold temperature. The second threshold temperature may be lower than the threshold temperature. For example, the second threshold temperature may be approximately 10°C to approximately 50°C below the threshold temperature.

[0050] In one particular example, there are multiple LEDs, such as four LEDs, that are sequentially turned off as the heating session nears its end. For example, all four LEDs may be lit 20 seconds before the device is finished operating. One of the four LEDs may be turned off when there are 15 seconds left. Another LED may be turned off when there are 10 seconds left. Another LED may be turned off when there are 5 seconds left, and all four LEDs may be turned off when there are 0 seconds left.

[0051] In another example, the haptic component may provide different haptic feedback patterns depending on the amount of time remaining. For example, the haptic component may provide haptic feedback indicating that a certain amount of time remains. The type of haptic feedback may indicate the amount of time remaining. For example, if 20 seconds remain, there may be short, low-intensity haptic feedback, and if only 5 or 0 seconds remain, the haptic feedback may be longer and more intense.

[0052] In yet another example, the auditory indicator may provide different sounds depending on the time remaining, such as pitch, tone, sound pattern, etc., that change over time.

[0053] The heating assembly may be configured to heat the aerosol-generating material such that the indicator assembly indicates that the device is ready for use in less than approximately 30 seconds, less than approximately 20 seconds, less than approximately 15 seconds, or less than approximately 10 seconds after the heating assembly begins heating the aerosol-generating material.

[0054] It has been found that certain heating assemblies, such as induction heating assemblies, can heat the aerosol-generating material to a suitable temperature in a shorter time than other types of heating assemblies. Thus, a user of the device may be able to inhale the aerosol using the device in, for example, less than approximately 20 seconds. Because certain heating assemblies can heat the aerosol-generating material so quickly, the aerosol-generating material will have released a sufficient amount of aerosol by the time the device indicates it is ready.

[0055] As previously mentioned, the device may be configured to operate in one of a first mode and a second mode, where when operating in the first mode, a component of the heating assembly is heated to a first temperature, and when operating in the second mode, a component of the heating assembly is heated to a second temperature, which may be higher than the first temperature.

[0056] In some examples, the timing at which the temperature meets at least one criterion is based on the heating mode. For example, in the second mode, the controller may be configured to cause the heating assembly to heat components of the heating assembly to a higher temperature than in the first mode. In the second mode, the timing at which the temperature meets the criterion may be earlier than when the device is operating in the first mode.

[0057] In some examples, the indicator assembly may indicate the selected heating mode. In some examples, this indicator is the same as the indicator that indicates the device is ready for use. Thus, the type of indicator used to indicate that the device is ready for use may be based on the selected heating mode. In other examples, the indicator that indicates the selected heating mode may occur after the heating mode is selected but before the device is ready for use. Thus, two separate indicators may occur. A first indicator may indicate the selected heating mode, and a second indicator may indicate that the device is ready for use. This may allow a user to cancel heating if they unintentionally select the wrong mode. In one particular example, the first indicator is provided by a tactile component, and the second indicator is provided by a visual component. This is useful because a user may hold the device when selecting a heating mode, but place the device on a surface while waiting for the device to be ready for use. The visual indicator is more easily visible when the user no longer holds the device.

[0058] The input interface may also be known as a user interface. The input interface may be a button, a touchscreen, a dial, a knob, or a wireless connection (e.g., Bluetooth) to a mobile device. The interface allows a user to select from a plurality of operating modes. The operating modes may include one or more heating modes and / or setting modes. When an input is received, the input interface may send one or more signals indicative of the input to the controller. Based on the signal(s), the controller may determine the selected operating mode, such as the selected heating mode or setting mode.

[0059] In one particular example, the input interface includes a button, and the input includes a signal indicating that the button has been released. The controller is capable of accepting input from the input interface. This causes the heating assembly to begin heating the aerosol-forming material only once the button is released. The heating assembly may not heat the aerosol-forming material while the user holds the button down. Thus, the predetermined time period begins when the user releases the button. The button may be a software button or a hardware button. The signal may be a single signal or two or more signals.

[0060] In one particular example, the input further includes a signal indicating the length of time the button is pressed, and the controller is configured to detect the input selecting the heating mode in response to (i) receiving a signal indicating that the button has been released and (ii) determining that the length of time the button has been pressed is equal to or greater than a threshold time. The signal indicating the length of time the button has been pressed may be part of the same signal indicating that the button has been released, or it may be a separate signal. Thus, in some examples, the heating assembly may begin heating only if the button is pressed for a specific length of time equal to or greater than the threshold time. In one particular example, the threshold time is 3 seconds or 5 seconds. If the button is held and released for less than the threshold time, the heating assembly may not begin heating. This can avoid heating the aerosol-generating material if the user accidentally presses the button, which could waste energy. Thus, if the controller determines that the button has been pressed for less than the threshold time, it determines not to cause the heating assembly to begin heating.

[0061] The controller may be configured to determine the selected heating mode based on the length of time the button is pressed. In one example, the device is configured to operate in a first mode when the button is pressed for a length of time that is equal to or greater than a first threshold time but less than a second threshold time, and to operate in a second mode when the button is pressed for a length of time that is equal to or greater than the second threshold time. For example, the first threshold time may be 3 seconds, and the second threshold time may be 5 seconds. This allows a user to select different modes using a single button. Selecting multiple modes through a single interface simplifies device operation and reduces the number of components. Fewer components means a lighter device with fewer parts to break or malfunction.

[0062] The heating assembly may be an inductive heating assembly. For example, the heating assembly may include one or more inductor coils and a susceptor. In another example, the heating assembly may be a resistive heating assembly. For example, one or more components that heat the aerosol-forming material may be resistively heated.

[0063] In one particular example, the heating assembly includes an inductor coil that generates a varying magnetic field and a susceptor configured to heat the aerosol-generating material, the susceptor being heatable by the penetration of the varying magnetic field. The controller is configured to cause the heating assembly to heat the aerosol-generating material by causing the inductor coil to generate the varying magnetic field. Thus, the susceptor may be a heated component of the heating assembly. For example, in a first mode, the inductor coil may be configured to heat the susceptor to a first temperature. For example, in a second mode, the inductor coil may be configured to heat the susceptor to a second temperature. Thus, a temperature sensor measures the temperature of the susceptor. The temperature sensor may be disposed between the susceptor and the first inductor coil. The temperature sensor is preferably disposed on the outer surface of the susceptor. The temperature sensor may be a thermistor or a thermocouple.

[0064] Induction heating systems have been found to be capable of heating the aerosol-forming material to a suitable temperature in a shorter amount of time than other types of heating assemblies, such as resistive heating assemblies.

[0065] In some examples, the inductor coil is a first inductor coil, and the device further includes a second inductor coil that generates a second varying magnetic field. In one particular configuration, the first inductor coil is adjacent to the second inductor coil in a direction along the longitudinal axis of the device, and the controller is configured to cause the second inductor coil to generate the second varying magnetic field after causing the indicator assembly to indicate that the device is ready for use. In use, the aerosol is drawn along the flow path of the device toward the proximal end of the device, and the first inductor coil is positioned closer to the proximal end of the device than the second inductor coil.

[0066] Thus, the device may include two inductor coils, with the first inductor coil being closer to the mouth end of the device. The first inductor coil heats the aerosol-generating material closer to the user's mouth. The first inductor coil is activated first. The second inductor coil can be activated later. For example, the controller may cause the second inductor coil to generate the second magnetic field a third predetermined time after causing the first inductor coil to generate the first magnetic field. The third predetermined time may be, for example, approximately 40 seconds to approximately 60 seconds. The third predetermined time may depend on the mode in which the device is operating.

[0067] The first inductor coil may continue to generate the first magnetic field while the second inductor coil generates the second magnetic field.

[0068] In one particular example, the first inductor coil has a first length and the second inductor coil has a second length, the first length being shorter than the second length. The shorter length reduces the amount of aerosol-generating material that is heated, thereby producing less aerosol, thereby reducing a phenomenon known as a "hot puff."

[0069] In another aspect, there is provided a method of operating the above-described aerosol delivery device, the method including causing a heating assembly of the device to heat an aerosol-generating material, determining a characteristic of the heating assembly, and causing an indicator assembly of the device to indicate that the device is ready for use if the determined characteristic meets at least one criterion.

[0070] The property may be the temperature of the heating assembly, for example, in an induction heating system, the temperature of the susceptor.

[0071] The at least one criterion may be met if the determined temperature is equal to or greater than a threshold temperature. The method may further include causing the indicator assembly to indicate that the device is ready for use a predetermined time after the determined temperature has been determined to meet the at least one criterion.

[0072] The method may further include causing the indicator assembly to indicate that the device is ready for use less than approximately 30 seconds after causing the heating assembly to begin heating the aerosol-forming material.

[0073] The method may further include causing the indicator assembly to indicate that the device has completed operation or is about to complete operation within a predetermined time after causing the heating assembly to begin heating the aerosol-generating material.

[0074] Although the method has been described with respect to any type of heating assembly, it is of course also applicable to devices with inductive heating assemblies.

[0075] In another aspect, an aerosol delivery device includes an inductor coil that generates a varying magnetic field, a susceptor configured to heat an aerosol-generating material, the susceptor being heatable by the penetration of the varying magnetic field, an indicator assembly, and a controller. The controller is configured to cause the inductor coil to begin generating the varying magnetic field and to cause the indicator assembly to indicate that the device has completed or is completing operation within a predetermined time after causing the inductor coil to begin heating the aerosol-generating material. This allows a user to be notified when the device has completed or is completing operation. This allows the user to stop continued use of the device if the amount, concentration, or temperature of the aerosol generated is no longer sufficient.

[0076] In another aspect, a method of operating an aerosol delivery device includes the steps of causing an inductor coil of the aerosol delivery device to generate a varying magnetic field that heats a susceptor, and causing an indicator assembly of the aerosol delivery device to indicate that the device has completed operation or is about to complete operation within a predetermined time after causing the inductor coil assembly to begin heating the aerosol-generating material.

[0077] Although the method is described with respect to an inductive heater, it should be understood that the method is also applicable to devices with non-inductive heating assemblies. For example, instead of an inductor coil, the device may include a heating assembly configured to heat the aerosol-forming material.

[0078] In one particular example, the indicator assembly includes one or more light-emitting diodes (LEDs) and an outer member disposed above the one or more LEDs. The outer member includes a plurality of openings visible from outside the aerosol delivery device. Electromagnetic radiation (e.g., in the form of visible light) passes through the plurality of openings and is visible to a user. At least a portion of the outer member may form the exterior surface of the device.

[0079] The indicator assembly may further include a light shaping member disposed between the one or more LEDs and the outer member. The light shaping member may include one or more light guides through which light is guided to create a particular pattern or design. The light shaping member may include opaque regions configured to block a portion of the light from the LEDs. The light shaping member may include transparent or translucent regions through which light may pass. Alternatively, the light shaping member may include openings through which light may pass. Light shaping members including opaque and transparent or translucent regions may be more robust than light shaping members with openings. Additionally, the translucent regions may further diffuse / reduce light.

[0080] In some instances, the light shaping element is formed by more than one overmolding component, for example, the opaque and transparent / translucent regions may be formed by two overmolding components.

[0081] In one example, the light shaping member includes an opaque region extending around its periphery / surrounding / outer perimeter, which can prevent light from leaking around the outer periphery of the outer member. The opaque region can be an outer ring.

[0082] In one example, the opaque areas are colored black or dark gray.

[0083] In one example, the opaque region is cross-shaped.

[0084] In one particular example, the device includes four LEDs, each of which is positioned below a light shaping member and between adjacent opaque regions such that light from the LEDs is separated into four quadrants, and the opaque regions are configured to prevent light from leaking from one quadrant to an adjacent quadrant.

[0085] Preferably, the device is a tobacco heating device, also known as a non-combustion heating device.

[0086] 1 shows an example of an aerosol delivery device 100 for generating an aerosol from an aerosol-generating medium / material. Generally, device 100 may be used to heat a replaceable item 110 containing an aerosol-generating medium to generate an aerosol or other inhalable medium that is inhaled by a user of device 100.

[0087] Device 100 comprises a housing 102 (in the form of an outer cover) that surrounds and houses the various components of device 100. Device 100 has an opening 104 at one end through which an item 110 may be inserted for heating by the heating assembly. In use, item 110 may be inserted in whole or in part into the heating assembly and heated by one or more components of the heating assembly.

[0088] The device 100 of this example includes a first end member 106 having a lid 108 that can be moved relative to the first end member 106 to close the opening 104 when the item 110 is not in place. While the lid 108 is shown in an open configuration in Figure 1, the lid 108 can also be moved to a closed configuration. For example, a user may slide the lid 108 in the direction of arrow "A."

[0089] Device 100 may also include an input interface 112, which may include buttons or switches that, when pressed, activate device 100. For example, a user may turn on device 100 by manipulating input interface 112.

[0090] Device 100 may also include an electrical connector / component, such as a socket / port 114, that can accept a cable for charging a battery in device 100. For example, socket 114 may be a charging port, such as a USB charging port. In some examples, socket 114 may additionally or alternatively be used to transfer data between device 100 and another device, such as a computing device.

[0091] 2 shows the device 100 of FIG. 1 without the outer cover 102 and without the item 110 present. The device 100 defines a longitudinal axis 134.

[0092] 2, a first end member 106 is disposed at one end of the device 100, and a second end member 116 is disposed at the opposite end of the device 100. The first and second end members 106, 116 together at least partially define an end surface of the device 100. For example, the bottom surface of the second end member 116 at least partially defines the bottom surface of the device 100. An edge of the outer cover 102 may also define a portion of the end surface. In this example, the lid 108 also defines a portion of the top surface of the device 100.

[0093] The end of the device nearest opening 104 is considered to be known as the proximal end (or mouth end) of device 100, as it is closest to the user's mouth during use. During use, a user inserts item 110 into opening 104 and operates user control 112 to initiate heating of the aerosol-generating material and utilize the aerosol generated in the device. This causes the aerosol to flow through device 100 along a flow path toward the proximal end of device 100.

[0094] The other end of the device furthest from opening 104 is considered to be known as the distal end of device 100, as this is the end that will be farthest from a user's mouth when in use. When a user utilizes the aerosol generated in the device, the aerosol flows in a direction away from the distal end of device 100.

[0095] Device 100 further includes a power source 118. Power source 118 may be a battery, such as a rechargeable or non-rechargeable battery. Examples of suitable batteries include lithium batteries (e.g., lithium-ion batteries), nickel batteries (e.g., nickel-cadmium batteries), and alkaline batteries. The battery is electrically coupled to the heating assembly to provide power as needed and heat the aerosol-forming material under the control of a controller (not shown). In this example, the battery is connected to a central support 120 that holds battery 118 in place. Central support 120 may also be known as a battery support or battery carrier.

[0096] The device further includes at least one electronics module 122. The electronics module 122 may include, for example, a printed circuit board (PCB). The PCB 122 may support at least one controller, such as a processor, and a memory. The PCB 122 may also include one or more electrical tracks that electrically connect together various electronic components of the device 100. For example, battery terminals may be electrically connected to the PCB 122 so that power can be distributed throughout the device 100. The socket 114 may also be electrically coupled to the battery via the electrical tracks.

[0097] In the exemplary device 100, the heating assembly is an induction heating assembly, comprising various components for heating the aerosol-generating material of the article 110 via an induction heating process. Induction heating is a process for heating an electrical conductor (such as a susceptor) via electromagnetic induction. The induction heating assembly may comprise an induction element (e.g., one or more inductor coils) and a device for passing a varying current, such as an alternating current, through the induction element. The varying current in the induction element generates a varying magnetic field. The varying magnetic field penetrates a susceptor suitably positioned relative to the induction element, generating eddy currents inside the susceptor. Because the susceptor has an electrical resistance to eddy currents, the flow of eddy currents against this resistance heats the susceptor via Joule heating. Additionally, if the susceptor comprises a ferromagnetic material, such as iron, nickel, or cobalt, heat may also be generated by magnetic hysteresis losses in the susceptor, i.e., the varying orientation of magnetic dipoles in the magnetic material as a result of alignment with the varying magnetic field. Induction heating allows for faster heating than, for example, conduction heating, because heat is generated inside the susceptor. Furthermore, no physical contact between the induction heater and the susceptor is required, which allows for greater flexibility in design and application.

[0098] The induction heating assembly of the exemplary device 100 includes a susceptor structure 132 (referred to herein as the "susceptor"), a first inductor coil 124, and a second inductor coil 126. The first and second inductor coils 124, 126 are constructed from a conductive material. In this example, the first and second inductor coils 124, 126 are constructed from litz wire / cable that is helically wound to provide the helical inductor coils 124, 126. Litz wire comprises multiple individual wires that are individually insulated and twisted together to form a single wire. Litz wire is designed to reduce skin effect losses in electrical conductors. In the exemplary device 100, the first and second inductor coils 124, 126 are constructed from copper litz wire with a rectangular cross section. In other examples, the litz wire may have other cross sections, such as a circular cross section.

[0099] The first inductor coil 124 is configured to generate a first varying magnetic field that heats a first portion of the susceptor 132, and the second inductor coil 126 is configured to generate a second varying magnetic field that heats a second portion of the susceptor 132. In this example, the first inductor coil 124 is adjacent to the second inductor coil 126 in a direction along the longitudinal axis 134 of the device 100 (i.e., the first and second inductor coils 124, 126 do not overlap). The susceptor structure 132 may comprise a single susceptor or may comprise two or more separate susceptors. Ends 130 of the first and second inductor coils 124, 126 are connectable to the PCB 122.

[0100] Of course, in some examples, the first and second inductor coils 124, 126 may have at least one characteristic that differs from one another. For example, the first inductor coil 124 may have at least one characteristic that differs from the second inductor coil 126. More specifically, in one example, the first inductor coil 124 may have a different inductance value than the second inductor coil 126. In FIG. 2 , the first and second inductor coils 124, 126 have different lengths such that the first inductor coil 124 is wound around the susceptor 132 by a smaller amount than the second inductor coil 126. Therefore, the first inductor coil 124 may have a different number of turns than the second inductor coil 126 (assuming the spacing between individual turns is substantially the same). In yet another example, the first inductor coil 124 may be made of a different material than the second inductor coil 126. In some examples, the first and second inductor coils 124, 126 may be substantially identical.

[0101] In this example, the first inductor coil 124 and the second inductor coil 126 are wound in opposite directions. This can be useful when the inductor coils are activated at different times. For example, the first inductor coil 124 may be activated first to heat a first portion of the article 110, and then the second inductor coil 126 may be activated to heat a second portion of the article 110. Winding the coils in opposite directions can help reduce current induced in the inactive coil when used in conjunction with certain types of control circuitry. In FIG. 2, the first inductor coil 124 is a right-handed spiral and the second inductor coil 126 is a left-handed spiral. However, in other embodiments, the inductor coils 124 and 126 may be wound in the same direction, or the first inductor coil 124 may be a left-handed spiral and the second inductor coil 126 may be a right-handed spiral.

[0102] The susceptor 132 in this example is hollow, thus defining a receptacle in which the aerosol-generating material is received, for example, the article 110 is insertable into the susceptor 132. In this example, the susceptor 120 is tubular with a circular cross section.

[0103] 2 further includes an insulating member 128 that may be generally tubular and at least partially surround the susceptor 132. The insulating member 128 may be constructed of any insulating material, such as, for example, plastic. In this particular example, the insulating member is constructed of polyetheretherketone (PEEK). The insulating member 128 may help to insulate various components of the device 100 from heat generated in the susceptor 132.

[0104] Additionally, the insulating member 128 can support all or part of the first and second inductor coils 124, 126. For example, as shown in FIG. 2 , the first and second inductor coils 124, 126 are disposed around the insulating member 128 and are in contact with the radially outer surface of the insulating member 128. In some examples, the insulating member 128 does not abut the first and second inductor coils 124, 126. For example, a small gap may exist between the outer surface of the insulating member 128 and the inner surfaces of the first and second inductor coils 124, 126.

[0105] In one particular example, the susceptor 132 , the insulating member 128 , and the first and second inductor coils 124 , 126 are coaxial about a central longitudinal axis of the susceptor 132 .

[0106] 3 is a partial cross-sectional side view of device 100. In this example, outer cover 102 is present. The rectangular cross-sectional shapes of first and second inductor coils 124, 126 are more clearly visible.

[0107] The device 100 further comprises a support 136 that engages one end of the susceptor 132 to hold the susceptor 132 in place. The support 136 is connected to the second end member 116.

[0108] The device may also include a second printed wiring board 138 associated with the input interface 112 .

[0109] The device 100 further includes a second lid / cap 140 and a spring 142 disposed at the distal end of the device 100. The spring 142 allows opening of the second lid 140 to provide access to the susceptor 132. A user may open the second lid 140 to clean the susceptor 132 and / or the support 136.

[0110] The device 100 further includes an expansion chamber 144 extending from the proximal end of the susceptor 132 toward the opening 140 of the device. Located within the expansion chamber 144 is at least a portion of a retention clip 146 that abuts and retains an article 110 received within the device 100. The expansion chamber 144 is connected to the end member 106.

[0111] FIG. 4 is an exploded view of the device 100 of FIG. 1 without the outer cover 102.

[0112] FIG. 5A of FIG. 5 shows a cross section of a portion of the device 100 of FIG. 1. FIG. 5B of FIG. 5 shows an enlarged view of a region of FIG. 5A. Both FIGS. 5A and 5B show an article 110 received within a susceptor 132, with the article 110 sized so that its outer surface abuts the inner surface of the susceptor 132, thereby providing the most efficient heating. In this example, the article 110 includes an aerosol-forming material 110a. The aerosol-forming material 110a is disposed within the susceptor 132. The article 110 may also include other components, such as a filter, packaging, and / or a cooling structure.

[0113] FIG. 5B shows that the outer surface of the susceptor 132 is spaced a distance 150 from the inner surfaces of the inductor coils 124, 126, measured in a direction perpendicular to the longitudinal axis 158 of the susceptor 132. In one particular example, the distance 150 is approximately 3 mm to 4 mm, approximately 3 mm to 3.5 mm, or approximately 3.25 mm.

[0114] 5B shows that the outer surface of the insulating member 128 is spaced a distance 152 from the inner surfaces of the inductor coils 124, 126, measured in a direction perpendicular to the longitudinal axis 158 of the susceptor 132. In one particular example, the distance 152 is approximately 0.05 mm. In another example, the distance 152 is substantially 0 mm, such that the inductor coils 124, 126 abut and contact the insulating member 128.

[0115] In one example, the susceptor 132 has a wall thickness 154 of approximately 0.025 mm to 1 mm, or approximately 0.05 mm.

[0116] In one example, the susceptor 132 has a length of approximately 40 mm to 60 mm, approximately 40 mm to 45 mm, or approximately 44.5 mm.

[0117] In one example, the insulating member 128 has a wall thickness 156 of approximately 0.25 mm to 2 mm, approximately 0.25 mm to 1 mm, or approximately 0.5 mm.

[0118] 6 is a front view of device 100. As briefly mentioned above, the device may include an input interface 112. In some examples, a user may operate device 100 by interacting with input interface 112. An indicator assembly may be located proximate input interface 112 and may indicate to the user the occurrence of one or more events, such as when the device is ready for use and / or when the device has completed operation. The indicator assembly may also indicate the mode in which device 100 is operating.

[0119] 6 shows outer member 202 positioned above (i.e., in front of) the indicator assembly. In other examples, the indicator assembly may be positioned elsewhere on the device. In the examples described herein, the indicator assembly includes a visual component configured to provide a visual indication. The visual component includes a plurality of LEDs that emit electromagnetic radiation, such as light, to indicate a particular event to a user. Of course, the indicator assembly may additionally or alternatively include a tactile component or an audible indicator. In this device 100, the indicator assembly includes a visual component and a tactile component.

[0120] The outer member 202 constitutes the outermost component of the input interface 112. A user may interact with the device 100 by pressing on the outer member 202. As described in more detail below, the outer member 202 includes a number of openings 204 through which light from a number of LEDs can pass.

[0121] 7 shows the housing 102 (also known as the outer cover) of the device 100. The housing 102 defines an opening 206. An outer member (not shown in FIG. 7) can be positioned within the opening 206. For example, the outer member can be positioned flush with the outer surface of the housing 102 or can be raised above or below the outer surface of the housing 102.

[0122] 8 shows the device 100 without the housing 102 in place. In this example, the outer member 202 is attached to the photoshaping member 210 via an adhesive layer 208. The adhesive in the adhesive layer 208 may cover some or all of the inner surface of the outer member 202. A sealing member 212 extends around the photoshaping member 210.

[0123] In some examples, the outer member 202, adhesive layer 208, photoshaping member 210, and sealing member 212 may be omitted from the device.

[0124] 9 shows device 100 with outer member 202, light shaping member 210, and sealing member 212 removed. Device 100 includes a visual component with four LEDs 214, although in other examples there may be a different number of LEDs, such as one or more LEDs 214. LEDs 214 are positioned below outer member 202 such that light travels from LEDs 214 through a plurality of openings 204 formed in outer member 202. Thus, light also passes through light shaping member 210 and adhesive layer 208. One or more additional components may also be positioned between LEDs 214 and outer member 202.

[0125] 9, the LEDs 214 are positioned around the input interface 112, which is configured to detect interactions from a user. For example, the user may press or actuate the outer member 202, which is detected by the input interface 112. The input interface 112 may be a button or switch that is activated when the user applies force to the outer member 202. In another example, the input interface 112 and the outer member 202 may be part of a capacitive sensor that detects when the user touches the outer member 202.

[0126] 10 is a front view of outer member 202. As previously mentioned, outer member 202 defines a plurality of openings 204. In this example, openings 204 each define a slot having a length and a width.

[0127] The opening 204 is preferably located on the periphery / periphery / outer periphery of the outer member 202. As shown in Figure 10, the opening 204 is located closer to the periphery of the outer member 202 than the center of the outer member 202. This allows the opening 204 to be exposed (and thus the light visible) even when a user is pressing on the outer member 202. A user may be more likely to press / hold the center of the outer member 202 than the edge of the outer member 202.

[0128] 11 is an exploded view showing some of the components of device 100. As mentioned above, device 100 may include an adhesive layer 208 disposed between LED 214 and outer member 202. In the illustrated example, the adhesive layer is the same shape and size as outer member 202 so that the adhesive covers opening 204. Light may then pass through adhesive layer 208 before passing through opening 204. Thus, adhesive layer 208 may be transparent or translucent. A translucent adhesive layer 208 may help diffuse the light from the LED so that "hot spots" are avoided. A hot spot is an area where the light intensity is higher than the surrounding area.

[0129] In some examples, the outer member 202 is attached to the light shaping member 210 via an adhesive layer 208. In the illustrated example, the light shaping member 210 includes one or more opaque regions 230 (which may be integrally joined) and one or more translucent or transparent regions 232 (which may also be integrally joined). The translucent or transparent regions 232 are sometimes known as light guides because they guide light through the light shaping member 210. Light from the LEDs 214 may pass through the translucent or transparent regions 232 but is blocked by the opaque regions 230. Thus, the opaque regions 230 reduce the intensity of light passing through some of the openings 204 (i.e., openings 204 located above the opaque regions 230). The opaque regions 230 and the translucent or transparent regions 232 may be regions of a single, integral component, or one or both regions may be treated to have unique optical properties. In another example, the opaque regions 230 and the translucent or transparent regions 232 are separate, overmolded components.

[0130] In this example, the light shaping member 210 includes an opaque region 230 extending around its periphery / surroundings / outer perimeter, which can prevent light from leaking around the outside of the outer member 202. The opaque region can be, for example, an outer ring.

[0131] In this example, device 100 includes four LEDs 214, each positioned between adjacent opaque regions 230 such that the light from the LED is separated into four quadrants. In other words, LEDs 214 may be positioned below a transparent or translucent region. By separating the light into different regions, different indications can be provided to the user. For example, the number of lit quadrants may indicate a particular event to the user. Thus, light may be blocked by the opaque regions such that it cannot pass through some of the openings.

[0132] In some instances, the areas between the opaque regions 230 are apertures and therefore do not contain translucent or transparent material.

[0133] A sealing member 212, such as a gasket, is disposed between the light shaping member 210 and the LED 214. The outer diameter of the sealing member 212 is larger than the outer diameters of the outer member 202 and the light shaping member 210. In some examples, the sealing member 210 abuts against the inner surface of the housing 102 to prevent liquid and dust from entering the device 100.

[0134] Indication that the device is ready to use 12 illustrates a system including a controller 302 (e.g., one or more processors), a heating assembly 304, a temperature sensor 308, an indicator assembly 306, and an input interface 112. In some examples, the input interface 112 may be omitted. The controller 302 is communicatively coupled to the heating assembly 304, the temperature sensor 308, the indicator assembly 306, and the input interface 112 via one or more wired or wireless connections (shown in dashed lines).

[0135] The controller 302 may be located on the PCB 122, for example. The controller 302 may control the operation of the device 100, such as causing the heating assembly 304 to heat the aerosol-generating material. In some examples, the controller 302 receives signals from the input interface 112 and, in response, controls the heating assembly 304 and the indicator assembly 306. A user may operate the device by providing input to the input interface 112. In particular examples, a heating mode is selected via the input interface 112.

[0136] As previously mentioned, the indicator assembly 306 can indicate to a user the occurrence of one or more events. The controller 302 can send a signal or command to the indicator assembly 306 to cause the indicator assembly 306 to provide an indication. In the example of Figures 6-11, the indicator assembly 306 includes a visual component that includes a plurality of LEDs 214. Of course, the following description is applicable to other types of indicator assemblies 306.

[0137] The temperature sensor 308 is configured to measure the temperature of the heating assembly 304. For example, the temperature sensor 308 can measure the temperature of the susceptor 132. The temperature sensor 308 can provide an output (e.g., in the form of one or more signals) indicative of the temperature of the heating assembly 304. The output can be received by the controller 302 and the temperature can be determined based on the output. In some examples, the output is indicative of the temperature. In other examples, the controller uses the output to calculate or determine the temperature. Thus, the controller 302 can monitor the temperature of the components of the heating assembly 304.

[0138] The controller 302 can control the heating assembly 304 based on the temperature. For example, the controller 302 can maintain the heating assembly 304 at or near a threshold temperature. If the temperature exceeds the threshold temperature, the controller 302 can control the heating assembly 304 to decrease the temperature. For example, the controller 302 can temporarily stop the heating assembly 304 from heating or can decrease the power output of the heating assembly 304. If the temperature falls below the threshold temperature, the controller 302 can control the heating assembly 304 to increase the temperature. For example, the controller 302 can start or continue heating the heating assembly or can increase the power output of the heating assembly 304.

[0139] In the following example, the heating assembly 304 includes one or more inductor coils that generate one or more magnetic fields to heat the susceptor. The controller 302 can cause the inductor coil(s) of the device 100 to generate the varying magnetic fields. For example, the controller 302 can send one or more signals to the inductor coil(s). When the inductor coil(s) generate the varying magnetic fields, the susceptor 132 is heated, which in turn heats the aerosol-generating material near the susceptor 132. Therefore, the temperature sensor 308 can be configured to measure the temperature of the susceptor 132. Of course, the following description can also apply to other types of heating assemblies 304.

[0140] The controller 302 may cause the one or more inductor coils to heat the susceptor to a threshold temperature of approximately 240°C to approximately 290°C. In one particular example, the device is configured to operate in one of a first mode and a second mode, the first and second modes being heating modes. In one example, when the device is operating in the first (default) mode, the controller 302 may cause the first inductor coil 124 to heat the first region of the susceptor 132 to a threshold temperature of approximately 240°C to approximately 260°C (e.g., approximately 250°C). In another example, when the device is operating in the second (boost) mode, the controller 302 may cause the first inductor coil 124 to heat the first region of the susceptor 132 to a threshold temperature of approximately 270°C to approximately 290°C (e.g., approximately 280°C).

[0141] The second inductor coil 126 may generate the second magnetic field later during the heating session. For example, the second inductor coil 126 may generate the second magnetic field approximately 60 seconds to approximately 130 seconds after the first inductor coil 124 generates the first magnetic field. The second inductor coil is configured to heat a second region of the susceptor 132. In some examples, both inductor coils 124, 126 operate simultaneously.

[0142] After the first inductor coil 124 begins heating the susceptor 132, the controller 302 can periodically or continuously determine the temperature of the heating assembly 304 based on the output from the temperature sensor 308. Thus, the controller 302 can determine the temperature of the susceptor 132 and determine whether this temperature satisfies at least one criterion. If the controller 302 determines that the temperature meets the criterion, the controller 302 causes the indicator assembly 306 to indicate that the device is ready for use. For example, the controller 302 can send a signal or command to the indicator assembly 306 to provide a particular indication.

[0143] In one example, the criteria is met if the determined temperature is greater than or equal to a threshold temperature.

[0144] In another example, the above criteria are met when the determined temperature is equal to or greater than the threshold temperature, but the controller 302 does not cause the indicator assembly 306 to indicate that the device is ready for use until a predetermined time has elapsed since the determined temperature was determined to be equal to or greater than the threshold temperature. This can be useful because, in some examples, the temperature of the susceptor 132 may fluctuate above and below the threshold temperature. Delaying the indicator assembly 306 from indicating that the device is ready for use allows time for heat to penetrate the aerosol-generating material. For example, even if the susceptor 132 is close to the threshold temperature, it may take at least 10 seconds to emit a suitable amount of aerosol. It may take up to approximately 60 seconds for the aerosol-generating material to heat up sufficiently.

[0145] In another example, the criterion is met if the determined temperature is at or above the threshold temperature for at least a predetermined period of time, again allowing time for heat to penetrate the aerosol-forming material.

[0146] Preferably, heating assembly 304 is configured so that the device is ready for use within approximately 30 seconds of initiating heating of the aerosol-forming material.

[0147] In one example, LEDs 214 emit light to indicate when device 100 is ready for use. For example, when device 100 is ready for use (i.e., after criteria have been met), one or all of LEDs 214 may be illuminated.

[0148] In one particular example, the number of LEDs 214 that are lit indicates when the device is ready for use. For example, the device may be ready for use when all LEDs 214 are lit.

[0149] 13A-13E show outer member 202 positioned above four LEDs 214. In this example, LEDs 214 illuminate sequentially as heating assembly 304 heats. For example, the number of illuminated LEDs may indicate how close the device is to being ready. When all four LEDs are illuminated, the device is ready for use.

[0150] 13A shows a point in time when none of the LEDs 214 are illuminated. At this point, the criteria have not been met and the controller 302 may or may not cause the inductor coil 124 to begin generating a varying magnetic field.

[0151] FIG. 13B shows the outer member 202 some time later than in FIG. 13A. At this point, one of the LEDs is illuminated, and light passes through some of the openings 204, illuminating one quadrant of the outer member 202. The LED may be configured to illuminate if the temperature of the susceptor 132 exceeds a first threshold. For example, the device may be operating in a mode in which the heating assembly is maintained at a threshold temperature of approximately 250°C. The first threshold may be below the threshold temperature. For example, the first threshold may be 220°C. Alternatively, the heating assembly may have already reached the threshold temperature and a first threshold time may have elapsed since reaching the threshold temperature. The heating assembly may still be at or above the threshold temperature or may have fallen below the threshold temperature at least once. The first threshold time may be, for example, 5 seconds after the controller determines that the temperature has reached the threshold temperature.

[0152] FIG. 13C shows the outer member 202 some time after FIG. 13B. At this point, two of the LEDs are illuminated, and light passes through some of the openings 204, illuminating two quadrants of the outer member 202. A second LED may be illuminated if the temperature of the susceptor 132 exceeds a second threshold. The second threshold may be higher than the first threshold but lower than the threshold temperature. For example, the first threshold may be 230° C. Alternatively, the heating assembly may have already reached the threshold temperature and a second threshold time may have elapsed since reaching the threshold temperature. The heating assembly may still be at or above the threshold temperature or may have fallen below the threshold temperature at least once. The second threshold time may be, for example, 10 seconds after the controller determines that the temperature has reached the threshold temperature.

[0153] FIG. 13D shows the outer member 202 some time after FIG. 13C. At this point, three of the LEDs are illuminated, and light passes through some of the openings 204, illuminating three quadrants of the outer member 202. A third LED may be illuminated if the temperature of the susceptor 132 exceeds a third threshold. The third threshold may be higher than the second threshold but lower than the threshold temperature. For example, the first threshold may be 240° C. Alternatively, the heating assembly may have already reached the threshold temperature and a third threshold time may have elapsed since reaching the threshold temperature. The heating assembly may still be at or above the threshold temperature or may have fallen below the threshold temperature at least once. The third threshold time may be, for example, 15 seconds after the controller determines that the temperature has reached the threshold temperature.

[0154] FIG. 13E shows the outer member 202 some time after FIG. 13D. At this point, all four LEDs are illuminated, allowing light to pass through the openings 204 and illuminate all four quadrants of the outer member 202. The fourth LED may be illuminated if the temperature of the susceptor 132 exceeds a fourth threshold. The fourth threshold may be equal to the threshold temperature. Alternatively, the heating assembly may have already reached the threshold temperature and a fourth threshold time may have elapsed since reaching the threshold temperature. The heating assembly may still be at or above the threshold temperature or may have fallen below the threshold temperature at least once. The fourth threshold time may be, for example, 20 seconds after the controller determines that the temperature has reached the threshold temperature. At this point, the criteria have been met and the device is ready for use. By illuminating all four LEDs, the indicator assembly 306 indicates that the device is ready for use.

[0155] In another example, the first threshold time may be between about 3 seconds and about 5 seconds, the second threshold time may be between about 6 seconds and about 10 seconds, the third threshold time may be between about 9 seconds and about 15 seconds, and the fourth threshold time may be between about 12 seconds and about 20 seconds. The first, second, third, and fourth threshold times may depend on the mode in which the device is operating. For example, when the device is operating in the first default mode, the first, second, third, and fourth threshold times may be longer than the first, second, third, and fourth threshold times, respectively, when the device is operating in the second boost mode. This may be because the aerosol-generating material heats up more rapidly in the second boost mode.

[0156] In one particular example, indicator assembly 306 may further include a tactile component configured to provide tactile feedback indicating that the device has begun heating the aerosol-generating material. This may be useful if none of the LEDs are lit when the inductor coil begins generating a magnetic field. The tactile feedback may indicate the mode in which the device is operating.

[0157] In another example, indicator assembly 306 may include a tactile component configured to provide tactile feedback that indicates that the device is ready for use. This may occur as an alternative to or in addition to any other type of indication. For example, indicator assembly 306 may provide both a visual indication and tactile feedback that indicates that the device is ready for use.

[0158] In another example, indicator assembly 306 may include an audible indicator configured to emit a sound to indicate that the device is ready for use. This may occur as an alternative to or in addition to any other type of indicator. For example, indicator assembly 306 may provide both a visual indicator and an audible emission to indicate that the device is ready for use.

[0159] Input Interface As previously described, the controller 302 detects input from the input interface 112 and, in response, determines the selected heating mode and causes the inductor coil 124 to generate a varying magnetic field. In this example, the input interface 112 includes a single button that sends a signal to the controller 302 indicating that the user has operated the input interface 112. In one particular example, this signal indicates that the user has released the button. Thus, the user can press and hold the button, and the controller 302 determines the selected heating mode and causes the inductor coil 124 to generate a varying magnetic field after the button is released.

[0160] In one particular example, a user can press and hold a button for different lengths of time, with the device operating in a particular mode depending on the length of time. Thus, the input received from the input interface 112 may include a signal indicating the length of time the button was pressed, and the controller 302 may be configured to cause the inductor coil 124 to generate a varying magnetic field in response to receiving a signal indicating that the button has been released and determining that the length of time the button was pressed is equal to or greater than a threshold time. The signal indicating the length of time may be an indication of the time itself or a button press signal that allows the controller to determine the length of time by measuring the time between the button press and button release signals. If the length of time is less than the threshold time, the device 100 does not begin heating. Based on this length of time, the controller 302 can determine the selected mode. In one particular example, if the length of time is less than the threshold time, the device 100 may display the power level of the device's power source 118.

[0161] As previously described, device 100 may be configured to operate in a first mode or a second mode. Thus, in one particular example, controller 302 is configured to operate the device in the first mode if the button is pressed for a length of time that is equal to or greater than a first threshold time but less than a second threshold time. If the button is pressed for a length of time that is equal to or greater than a second threshold time, the device is configured to operate in the second mode. For example, the first threshold time may be three seconds, and the second threshold time may be five seconds. This allows a user to select different modes using a single button. If the user holds the button down for more than three seconds but less than five seconds, the device operates in the first mode.

[0162] In one particular example, the device is configured to operate in a configuration mode if the button is pressed for a length of time equal to or greater than a third threshold time. The configuration mode allows a user to configure the device. The third threshold time may be greater than the second threshold time. In one particular example, the third threshold time is 8 seconds. If the user holds the button down for more than 5 seconds but less than 8 seconds, the device operates in a second mode.

[0163] In another example, the device is configured to display the power level of the power source 118 if the button is pressed for a length of time equal to or greater than a fourth threshold time but less than the first time. The fourth threshold time may be, for example, one second. If the user holds the button down for more than one second but less than three seconds, the device can display the power level. The power level may be indicated by the indicator assembly 306. For example, a power level between 0% and 25% may illuminate one of the four LEDs 214. A power level between 25% and 50% may illuminate two of the LEDs 214. A power level between 50% and 75% may illuminate three of the LEDs 214. A power level between 75% and 100% may illuminate four of the LEDs 214.

[0164] Only one particular type of input interface 112 has been described above. In another example, a user selects an operating mode using a touchscreen. In another example, there may be one or more input interfaces. For example, to operate the device in a first mode, a user may operate a first input interface, and to operate the device in a second mode, a user may operate a second input interface. Thus, the controller 302 may be configured to cause the inductor coil to generate a varying magnetic field in response to input received from one of the first and second input interfaces.

[0165] Indication that the device has finished working As described above, indicator assembly 306 can indicate when the device is ready for use or when the device has begun heating the aerosol-generating material. Alternatively or additionally, indicator assembly 306 can indicate when the device has completed or is completing an operation. In certain examples, indicator assembly 306 is configured to indicate the time remaining until the device has completed its operation.

[0166] The device may be configured to heat the aerosol-generating material for a predetermined period of time. Accordingly, the controller 302 may cause the indicator assembly 306 to indicate that the device has finished operating or is about to finish operating within a predetermined period of time after causing the inductor coil to generate the varying magnetic field. This predetermined period of time may be, for example, approximately three minutes, three minutes and 30 seconds, or four minutes. In some examples, this predetermined period of time depends on the mode in which the device is operating.

[0167] In one example, indicator assembly 306 indicates that the device has completed or is completing an operation by ceasing any indicators. For example, while the device is operating, visual components such as one or more LEDs may provide a visual indication that the device is operating. When the visual indicators cease, the user may be informed that the device has completed an operation. For example, if one or more LEDs are illuminated while the device is operating, and the device has completed an operation, the LEDs may be turned off to provide an indication to the user.

[0168] In another example, indicator assembly 306 indicates that the device has completed an operation with a particular indicator. For example, a visual component may indicate that the device has completed or is completing an operation with a particular indicator. This visual indicator may be different from the previous visual indicator. For example, if one or more LEDs are lit while the device is operating, they may flash in a particular pattern to indicate that the device has completed or is completing an operation.

[0169] In one particular example, indicator assembly 306 may further include a tactile component configured to provide tactile feedback indicating that the device has completed or is completing an operation. In another example, indicator assembly 306 may include an audio indicator configured to emit a sound to indicate that the device has completed or is completing an operation. Two or more different types of indicators may be provided.

[0170] In some examples, the controller 302 may cause the indicator assembly 306 to indicate that the device has completed operation or is completing operation if the determined temperature meets a second criterion. The second criterion may be met if the determined temperature is equal to or less than a second threshold temperature. The second threshold temperature may be approximately 10° C. to approximately 50° C. below the aforementioned threshold temperature. Thus, if the heating assembly 304 drops below a certain point, the indicator assembly 306 may indicate that the device has completed operation or is completing operation.

[0171] In some examples, indicator assembly 306 is configured to provide an indication of the time remaining before the device completes its operation, for example, at various times when the device approaches its end time.

[0172] In one example, the haptic component may provide haptic feedback 20 seconds from the end of the heating session, 15 seconds from the end of the heating session, 10 seconds from the end of the heating session, 5 seconds from the end of the heating session, and at the end of the heating session. The haptic feedback provided at each time point may be the same or different. For example, the feedback may be stronger or longer lasting toward the end of the heating session.

[0173] In another example, indicator assembly 306 includes multiple LEDs, with the number of lit LEDs indicating the time remaining until the device has finished operating. For example, a first number of LEDs may be lit when the device is operating, and a second number of LEDs may be lit when the device has finished operating, where the second number may be less than the first number. The second number may be, for example, zero. The first number may be all of the LEDs. Thus, the LEDs may perform a "countdown" as the device nears completion.

[0174] In one particular example, there are multiple LEDs, such as four LEDs, that are sequentially turned off as the heating session nears its end. FIG. 13E may show the outer member 202 when the device is operating. The first and / or second inductor coils may or may not be activated at this point. At this point, all four LEDs are lit, indicating that the user can still use the device. A threshold time may remain before the device terminates operation. For example, 20 seconds may remain before the device terminates operation.

[0175] In one example, the device may be said to have "completion of operation" when the first and / or second inductor coils stop generating the varying magnetic field. In another example, the device may be said to have "completion of operation" when the aerosol temperature / amount is deemed to have fallen below acceptable levels (which may be after the first and / or second inductor coils stop generating the varying magnetic field).

[0176] Figure 13D may show the outer member 202 at a later point in time than Figure 13E. For example, there may only be 15 seconds left until the device is finished operating. At this point, one of the four LEDs is off, and light passes through some of the openings 204, illuminating three quadrants of the outer member 202.

[0177] Figure 13C may show the outer member 202 at a later point in time than Figure 13D. For example, there may only be 10 seconds left before the device finishes operation. At this point, two of the four LEDs are off, and light passes through some of the openings 204, illuminating two quadrants of the outer member 202.

[0178] Figure 13B may show the outer member 202 at a later point in time than Figure 13C. For example, there may only be five seconds left before the device finishes operation. At this point, three of the four LEDs are off, and light is passing through some of the openings 204, illuminating one quadrant of the outer member 202.

[0179] Figure 13A may show outer member 202 at a later point in time than Figure 13B. For example, the device may have finished operating. At this point, all four LEDs are off and no light is visible. Thus, indicator assembly 306 indicates that the device has finished operating, while also indicating the time remaining until the device has finished operating.

[0180] In another example, the LEDs are sequentially turned off based on the temperature of the heating assembly (i.e., as the end of the heating session approaches). For example, all four LEDs may be illuminated before the device terminates operation. One of the four LEDs may be turned off when the temperature drops by a first number of degrees. Another LED may be turned off when the temperature drops by a second number of degrees. Another LED may be turned off when the temperature drops by a third number of degrees, and all four LEDs may be turned off when the temperature drops by a fourth number of degrees. The first number of degrees may be approximately 5-10°C below the operating temperature (i.e., threshold temperature) of the heating assembly. The second number of degrees may be approximately 10-20°C below the operating temperature (i.e., threshold temperature) of the heating assembly. The third number of degrees may be approximately 15-30°C below the operating temperature (i.e., threshold temperature) of the heating assembly. The fourth degree may be approximately 20-40° C. below the operating temperature (i.e., threshold temperature) of the heating assembly. The fourth degree may be equal to the second threshold temperature mentioned above.

[0181] 14 is a flow diagram of a method of operating an aerosol delivery device. The method includes, at block 402, causing a heating assembly of the device to heat an aerosol-generating material. The method includes, at block 404, determining a temperature of the heating assembly based on output from a temperature sensor. The method includes, at block 406, causing an indicator assembly of the device to indicate that the device is ready for use if the determined temperature meets at least one criterion.

[0182] 15 is a flow diagram of another method of operating an aerosol delivery device. The method includes, at block 502, causing an inductor coil of the aerosol delivery device to generate a varying magnetic field that heats a susceptor. The method includes, at block 504, causing an indicator assembly of the aerosol delivery device to indicate that the device has completed or is completing operation within a predetermined time after causing the inductor coil assembly to begin heating the aerosol-generating material.

[0183] The above-described embodiments are to be understood as illustrative examples of the invention. Other embodiments of the invention are contemplated. It is to be understood that any feature described with respect to any one embodiment can be used alone or in combination with other described features, and can also be used in combination with one or more features of any other embodiment or any combination thereof. Furthermore, equivalents and modifications not described above may be employed without departing from the scope of the invention as defined in the appended claims. The present disclosure includes the following embodiments. (Embodiment 1) 1. An aerosol delivery device comprising: a heating assembly configured to heat the aerosol-forming material; and an indicator assembly; causing the heating assembly to heat the aerosol-forming material; determining a characteristic of the heating assembly; causing the indicator assembly to indicate that the device is ready for use if the determined characteristic meets at least one criterion; a controller configured to: An aerosol delivery device comprising: (Embodiment 2) 2. The aerosol delivery device of embodiment 1, wherein the characteristic is a temperature of the heating assembly. (Embodiment 3) a temperature sensor configured to provide an output indicative of the temperature of the heating assembly; The control device receiving the output from the temperature sensor; determining the temperature of the heating assembly based on the output from the temperature sensor; 3. The aerosol delivery device of embodiment 2, configured to: (Embodiment 4) 4. The aerosol delivery device of embodiment 3, wherein the at least one criterion is met if the determined temperature is equal to or greater than a threshold temperature. (Embodiment 5) An aerosol delivery device as described in embodiment 4, wherein the control device is configured to cause the indicator assembly to indicate that the device is ready for use after a predetermined time has passed since the determined temperature was determined to satisfy at least one criterion. (Embodiment 6) 4. The aerosol delivery device of embodiment 3, wherein the at least one criterion is met if the determined temperature is equal to or greater than a threshold temperature for at least a predetermined period of time. (Embodiment 7) 7. The aerosol delivery device of any one of embodiments 4 to 6, wherein the threshold temperature is greater than approximately 240°C. (Embodiment 8) 8. The aerosol delivery device of any one of embodiments 4 to 7, wherein the device is configured to operate in one of a first mode and a second mode, the first mode having different heating characteristics than the second mode, and the threshold temperature is different between the first mode and the second mode. (Embodiment 9) 9. The aerosol delivery device of any one of embodiments 1 to 8, wherein the indicator assembly comprises a visual component that indicates when the device is ready for use. (Embodiment 10) An aerosol delivery device as described in any one of embodiments 1 to 9, wherein the indicator assembly comprises a tactile component configured to provide tactile feedback indicating that the device is ready for use. (Embodiment 11) 11. The aerosol delivery device of any one of embodiments 1 to 10, wherein the indicator assembly comprises an auditory component configured to emit a sound indicating that the device is ready for use. (Embodiment 12) 12. The aerosol delivery device of any one of claims 1 to 11, wherein the heating assembly is configured to heat the aerosol-generating material such that the indicator assembly indicates that the device is ready for use in less than approximately 30 seconds after the heating assembly begins heating the aerosol-generating material. (Embodiment 13) 12. The aerosol delivery device of any one of claims 1 to 11, wherein the control device is configured to cause the heating assembly to heat the aerosol-generating material such that the indicator assembly indicates that the device is ready for use in less than approximately 30 seconds after causing the heating assembly to begin heating the aerosol-generating material. (Embodiment 14) An aerosol delivery device described in any one of embodiments 1 to 13, wherein the control device is configured to cause the indicator assembly to indicate that the device has completed operation or is about to complete operation within a predetermined time after causing the heating assembly to heat the aerosol-generating material. (Embodiment 15) the heating assembly: an inductor coil for generating a varying magnetic field; a susceptor configured to heat the aerosol-generating material, the susceptor being heatable by penetration of the varying magnetic field; Equipped with An aerosol delivery device described in any one of embodiments 1 to 14, wherein the control device is configured to cause the inductor coil to generate the varying magnetic field, thereby causing the heating assembly to heat the aerosol-generating material. (Embodiment 16) the inductor coil is a first inductor coil, and the heating assembly further comprises a second inductor coil that generates a second varying magnetic field; the first inductor coil is adjacent to the second inductor coil in a direction along the longitudinal axis of the device; the controller is configured to cause the second inductor coil to generate the second varying magnetic field after causing the indicator assembly to indicate that the device is ready for use; 16. An aerosol delivery device as described in embodiment 15, wherein, in use, the aerosol is drawn along a flow path of the device toward the proximal end of the device, and the first inductor coil is positioned closer to the proximal end of the device than the second inductor coil. (Embodiment 17) 1. A method of operating an aerosol delivery device, comprising: causing a heating assembly of the device to heat an aerosol-forming material; determining a characteristic of the heating assembly; causing an indicator assembly of the device to indicate that the device is ready for use if the determined characteristic satisfies at least one criterion; A method comprising: (Embodiment 18) 18. The method of claim 17, wherein the property is the temperature of the heating assembly. (Embodiment 19) 19. The method of embodiment 18, wherein the at least one criterion is met if the determined temperature is greater than or equal to a threshold temperature. (Embodiment 20) 20. The method of claim 19, comprising causing the indicator assembly to indicate that the device is ready for use a predetermined time after the determined temperature has been determined to satisfy the at least one criterion. (Embodiment 21) 19. The method of embodiment 18, wherein the at least one criterion is met if the determined temperature is equal to or greater than a threshold temperature for at least a predetermined period of time. (Embodiment 22) 22. The method of any one of embodiments 19 to 21, wherein the threshold temperature is greater than approximately 240°C. (Embodiment 23) 23. The method of any one of embodiments 19 to 22, wherein the device is configured to operate in one of a first mode and a second mode, the first mode having different heating characteristics than the second mode, and the threshold temperature is different between the first mode and the second mode. (Embodiment 24) 24. The method of any one of embodiments 17 to 23, comprising causing the indicator assembly to indicate that the device is ready for use less than approximately 30 seconds after the heating assembly begins to heat the aerosol-generating material. (Embodiment 25) 25. The method of any one of embodiments 17 to 24, further comprising the step of causing the indicator assembly to indicate that the device has completed operation or is about to complete operation within a predetermined time after the heating assembly begins heating the aerosol-generating material.

Claims

1. 1. An aerosol delivery device comprising: a heating assembly configured to heat the aerosol-forming material; and an indicator assembly; causing the heating assembly to heat the aerosol-forming material; causing the indicator assembly to indicate that the device has completed or is completing an operation; causing the indicator assembly to indicate the time remaining until the device has completed operation by providing indicators at a plurality of different times as the device approaches its end time; a controller configured to: An aerosol delivery device comprising:

2. the controller is configured to cause the indicator assembly to indicate that the device has completed operation or is completing operation within a predetermined time after causing the heating assembly to heat the aerosol-forming material. The aerosol delivery device of claim 1 .

3. the predetermined time period is determined by the mode in which the device is operating; The aerosol delivery device of claim 2 .

4. a temperature sensor configured to provide an output indicative of a temperature of the heating assembly; The control device receiving the output from the temperature sensor; determining a temperature of the heating assembly based on the output from the temperature sensor; configured to: The aerosol delivery device of claim 1 .

5. The control device determining a temperature of the heating assembly; causing the indicator assembly to indicate that the device has completed operation or is completing operation if the determined temperature meets a criterion; configured to:

5. The aerosol delivery device of claim 4.

6. The criterion is met if the determined temperature is less than or equal to a threshold temperature.

6. The aerosol delivery device of claim 5.

7. the threshold temperature is less than approximately 230°C; The aerosol delivery device of claim 6 .

8. The indicator assembly includes a plurality of LEDs, the number of lit LEDs indicating the time remaining until the device is finished operating. The aerosol delivery device according to any one of claims 1 to 7.

9. the indicator assembly includes a visual component that indicates that the device has completed or is completing an operation; 9. The aerosol delivery device according to any one of claims 1 to 8.

10. the indicator assembly indicates that the device has completed or is completing an operation by ceasing to provide a visual indication; 10. The aerosol delivery device of claim 9.

11. the indicator assembly comprises a tactile component configured to provide tactile feedback indicating that the device has completed or is completing an operation.

11. The aerosol delivery device according to any one of claims 1 to 10.

12. the indicator assembly comprises an audible component configured to emit a sound indicating that the device has completed or is completing an operation.

12. The aerosol delivery device according to any one of claims 1 to 11.

13. the heating assembly: an inductor coil for generating a varying magnetic field; a susceptor configured to heat the aerosol-generating material, the susceptor being heatable by penetration of the varying magnetic field; the controller is configured to cause the inductor coil to generate the varying magnetic field, thereby causing the heating assembly to heat the aerosol-forming material.

13. The aerosol delivery device according to any one of claims 1 to 12.

14. the inductor coil is a first inductor coil, and the heating assembly further comprises a second inductor coil that generates a second varying magnetic field; the first inductor coil is adjacent to the second inductor coil in a direction along a longitudinal axis of the device; the controller is configured to cause the indicator assembly to indicate that the device is ready for use and then cause the second inductor coil to generate the second varying magnetic field; In use, the aerosol is drawn along a flow path of the device towards a proximal end of the device, and the first inductor coil is positioned closer to the proximal end of the device than the second inductor coil.

14. The aerosol delivery device of claim 13.

15. 1. A method of operating an aerosol delivery device, comprising: causing a heating assembly of the device to heat an aerosol-forming material; causing an indicator assembly of the device to indicate that the device has completed or is completing an operation; causing the indicator assembly to indicate the time remaining until the device has finished operating by providing indicators at a plurality of different times as the device approaches its end time; A method comprising:

16. causing the indicator assembly to indicate that the device has completed operation or is completing operation within a predetermined time after causing the heating assembly to heat the aerosol-forming material.

16. The method of claim 15.

17. the predetermined time period is determined by the mode in which the device is operating; 17. The method of claim 16.

18. determining a temperature of the heating assembly; If the determined temperature meets a criterion, causing the indicator assembly to indicate that the device has completed operation or is completing operation; 16. The method of claim 15, comprising:

19. At least one of the criteria is met if the determined temperature is less than or equal to a threshold temperature.

20. The method of claim 18.

20. the threshold temperature is less than approximately 230°C; 20. The method of claim 19.

Images