PATENT DOCUMENT

Publication Number: US-11463797-B2
Application Number: US-202117219799-A
Country: US
Kind Code: B2

Title: Force-activated earphone

Abstract:
An earphone includes a speaker housing; a speaker positioned in the speaker housing; a stem extending from the speaker housing, the stem defining an input surface; a conductive object disposed within the stem; a flexible circuit positioned between the stem and the conductive object; a member positioned between the flexible circuit and the conductive object operable to allow the flexible circuit to move with respect to the stem; a force sensor electrode disposed within the flexible circuit; and a controller operable to determine an input to the earphone using a change in capacitance detected using the force sensor electrode, the change in capacitance corresponding to a non-binary amount of a force applied to the input surface. In some examples, the earphone further includes a touch sensor electrode disposed within the flexible circuit.

Claims:
What is claimed is: 
     
       1. An earphone, comprising:
 a speaker housing; 
 a speaker positioned in the speaker housing; 
 a stem extending from the speaker housing, the stem defining an input surface; 
 a conductive object disposed within the stem; 
 a flexible circuit positioned between the stem and the conductive object; 
 a deformable material positioned between the flexible circuit and the conductive object operable to deform when a force is applied to the input surface; 
 a touch sensor electrode disposed within the flexible circuit facing the stem; 
 a force sensor electrode disposed within the flexible circuit facing the deformable material; and 
 a shield disposed between the touch sensor electrode and the force sensor electrode. 
 
     
     
       2. The earphone of  claim 1 , further comprising a controller that is operable to determine a first input to the earphone using a touch detected using the touch sensor electrode. 
     
     
       3. The earphone of  claim 2 , wherein the controller is operable to determine a second input to the earphone using a non-binary amount of the force, the non-binary amount of the force determined according to a change in capacitance detected using the force sensor electrode. 
     
     
       4. The earphone of  claim 1 , further comprising a controller, wherein:
 the touch sensor electrode comprises a first touch sensor electrode and a second touch sensor electrode; and 
 the controller is operable to detect a touch moving along the input surface using the first touch sensor electrode and the second touch sensor electrode. 
 
     
     
       5. The earphone of  claim 1 , further comprising a controller that is operable to determine an input to the earphone using a touch detected using the touch sensor electrode and a non-binary amount of the force, the non-binary amount of the force determined according to a change in capacitance detected using the force sensor electrode. 
     
     
       6. The earphone of  claim 5 , wherein the conductive object comprises the controller. 
     
     
       7. The earphone of  claim 6 , wherein the controller is sputtered, plated, or deposited with conductive material. 
     
     
       8. The earphone of  claim 1 , further comprising an antenna assembly. 
     
     
       9. The earphone of  claim 8 , wherein the flexible circuit extends between the conductive object and the antenna assembly. 
     
     
       10. The earphone of  claim 1 , wherein the deformable material comprises at least one of foam or gel. 
     
     
       11. An earphone, comprising:
 a speaker housing; 
 a speaker positioned in the speaker housing; 
 a stem extending from the speaker housing, the stem defining an input surface; 
 a conductive object disposed within the stem; 
 a flexible circuit positioned between the stem and the conductive object; 
 a spring member positioned between the flexible circuit and the conductive object operable to bias the flexible circuit toward the stem and allow the flexible circuit to move toward the conductive object when a force is applied to the input surface; 
 a touch sensor electrode disposed within the flexible circuit facing the stem; 
 a force sensor electrode disposed within the flexible circuit facing the spring member; and 
 a shield disposed between the touch sensor electrode and the force sensor electrode. 
 
     
     
       12. The earphone of  claim 11 , wherein the spring member is formed of metal. 
     
     
       13. The earphone of  claim 11 , wherein a first end of the flexible circuit overlaps a second end of the spring member. 
     
     
       14. The earphone of  claim 11 , further comprising an antenna assembly, wherein:
 the flexible circuit is coupled to the antenna assembly; and 
 the spring member is coupled to the conductive object. 
 
     
     
       15. The earphone of  claim 14 , wherein the flexible circuit is positioned between the antenna assembly and the conductive object. 
     
     
       16. The earphone of  claim 11 , wherein the conductive object functions as a ground for the force sensor electrode. 
     
     
       17. The earphone of  claim 11 , wherein a capacitance of the force sensor electrode changes as the flexible circuit moves with respect to the conductive object. 
     
     
       18. An earphone, comprising:
 a speaker housing; 
 a speaker positioned in the speaker housing; 
 a stem extending from the speaker housing, the stem defining an input surface; 
 a conductive object disposed within the stem; 
 a flexible circuit positioned between the stem and the conductive object; 
 a member positioned between the flexible circuit and the conductive object operable to allow the flexible circuit to move with respect to the stem; 
 a force sensor electrode disposed within the flexible circuit; and 
 a controller operable to determine an input to the earphone using a change in capacitance detected using the force sensor electrode, the change in capacitance corresponding to a non-binary amount of a force applied to the input surface. 
 
     
     
       19. The earphone of  claim 18 , wherein the flexible circuit is positioned around at least two sides of the conductive object. 
     
     
       20. The earphone of  claim 18 , wherein the conductive object is coupled to the stem.

Description:
CROSS-REFERENCE TO RELATED APPLICATIONS 
     This application is a continuation-in-part of U.S. patent application Ser. No. 16/539,515, filed Aug. 13, 2019, which is a nonprovisional of and claims the benefit under 35 U.S.C. § 119(e) of U.S. Provisional Patent Application No. 62/734,389, filed Sep. 21, 2018, entitled “Force-Activated Earphone,” the contents of which are incorporated herein by reference as if fully disclosed herein. 
    
    
     FIELD 
     The described embodiments relate generally to earphones. More particularly, the present embodiments relate to force-activated earphones. 
     BACKGROUND 
     Earphones are often used to provide audio output to users of electronic devices without overly disturbing people around them. For example, headsets for personal electronic devices (such as computing devices, digital media players, music players, transistor radios, and so on) typically include a pair of earphones. These earphones are usually configured with ear cups that go over the user&#39;s ears or with ear pieces or speakers that insert into the user&#39;s ear canal in order to form an acoustic chamber with the user&#39;s ear. The earphones typically produce acoustic waves that are transmitted into that acoustic chamber through one or more acoustic ports. In this way, the user can hear the audio output without overly disturbing people in the environment around the user. 
     Many such earphones include no input devices. Instead, such earphones may be controlled using input devices incorporated into external electronic devices to which the earphones may be wired or wirelessly coupled. 
     Other earphones may include one or more input devices. For example, earphones may be configured with one or more buttons, dials, switches, sliders, and so on. Such input devices may be used to activate (e.g., provide input to) the earphone. 
     SUMMARY 
     The present disclosure relates to force-activated electronic devices, such as earphones. A non-binary amount of a force applied to a force input surface defined by a housing of the earphone is determinable using a change in a mutual capacitance between first and second force electrodes. A spring member disposed within the housing biases the first force electrode towards the housing and allows it to move towards the second force electrode when the force is applied. In some implementations, the earphone may detect touch on a touch input surface defined by the housing. In various examples of such an implementation, the earphone may determine the non-binary amount of the force upon detection of the touch. In a particular embodiment, the first and second force electrodes may be implemented using separate sections of a single flexible circuit. This flexible circuit may flex to allow the first force electrode to move toward the second force electrode when the force is applied. This flexible circuit may also flex to allow the first force electrode to move away from the second force electrode when the force is no longer applied. 
     In various embodiments, an earphone includes a speaker housing; a speaker positioned in the speaker housing; a stem extending from the speaker housing, the stem defining an input surface; a conductive object disposed within the stem; a flexible circuit positioned between the stem and the conductive object; a deformable material positioned between the flexible circuit and the conductive object operable to deform when a force is applied to the input surface; a touch sensor electrode disposed within the flexible circuit facing the stem; a force sensor electrode disposed within the flexible circuit facing the deformable material; and a shield. The shield is disposed between the touch sensor electrode and the force sensor electrode. 
     In some examples, the earphone further includes a controller that is operable to determine a first input to the earphone using a touch detected using the touch sensor electrode. In various implementations of such examples, the controller is operable to determine a second input to the earphone using a non-binary amount of the force, the non-binary amount of the force determined according to a change in capacitance detected using the force sensor electrode. 
     In a number of examples, the earphone further includes a controller, the touch sensor electrode includes a first touch sensor electrode and a second touch sensor electrode, and the controller is operable to detect a touch moving along the input surface using the first touch sensor electrode and the second touch sensor electrode. In various examples, the earphone further includes a controller that is operable to determine an input to the earphone using a touch detected using the touch sensor electrode and a non-binary amount of the force, the non-binary amount of the force determined according to a change in capacitance detected using the force sensor electrode. In some implementations of such examples, the conductive object is the controller. In various implementations of such examples, the controller is sputtered, plated, or deposited with conductive material. 
     In some examples, the earphone further includes an antenna assembly. In various implementations of such examples, the flexible circuit extends between the conductive object and the antenna assembly. In a number of examples, the deformable material is at least one of foam or gel. 
     In some embodiments, an earphone includes a speaker housing; a speaker positioned in the speaker housing; a stem extending from the speaker housing, the stem defining an input surface; a conductive object disposed within the stem; a flexible circuit positioned between the stem and the conductive object; a spring member positioned between the flexible circuit and the conductive object operable to bias the flexible circuit toward the stem and allow the flexible circuit to move toward the conductive object when a force is applied to the input surface; a touch sensor electrode disposed within the flexible circuit facing the stem; a force sensor electrode disposed within the flexible circuit facing the spring member; and a shield. The shield is disposed between the touch sensor electrode and the force sensor electrode. 
     In various examples, the spring member is formed of metal. In a number of examples, a first end of the flexible circuit overlaps a second end of the spring member. In some examples, the earphone further includes an antenna assembly, the flexible circuit is coupled to the antenna assembly, and the spring member is coupled to the conductive object. In a number of implementations of such examples, the flexible circuit is positioned between the antenna assembly and the conductive object. 
     In some examples, the conductive object functions as a ground for the force sensor electrode. In various examples, a capacitance of the force sensor electrode changes as the flexible circuit moves with respect to the conductive object. 
     In a number of embodiments, an earphone includes a speaker housing; a speaker positioned in the speaker housing; a stem extending from the speaker housing, the stem defining an input surface; a conductive object disposed within the stem; a flexible circuit positioned between the stem and the conductive object; a member positioned between the flexible circuit and the conductive object operable to allow the flexible circuit to move with respect to the stem; a force sensor electrode disposed within the flexible circuit; and a controller. The controller is operable to determine an input to the earphone using a change in capacitance detected using the force sensor electrode, the change in capacitance corresponding to a non-binary amount of a force applied to the input surface. 
     In some examples, the flexible circuit is positioned around at least two sides of the conductive object. In various examples, the conductive object is coupled to the stem. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       The disclosure will be readily understood by the following detailed description in conjunction with the accompanying drawings, wherein like reference numerals designate like structural elements. 
         FIG. 1A  depicts a block diagram illustrating example functional relationships between example components that may be implemented in an electronic device. 
         FIG. 1B  depicts an example implementation of the electronic device of  FIG. 1A . 
         FIG. 1C  depicts a user using the example electronic device of  FIG. 1B . 
         FIG. 1D  depicts the electronic device of  FIG. 1C  forming an acoustic chamber with an ear canal of the user. 
         FIG. 2A  depicts an example cross-sectional view of the electronic device of  FIG. 1A , taken along line A-A of  FIG. 1B . 
         FIG. 2B  depicts the electronic device of  FIG. 2A  when a force is applied to the input surfaces. 
         FIG. 3A  depicts a first side of an example flexible circuit that may be used to implement the electronic device depicted in  FIG. 2A . 
         FIG. 3B  depicts a second side of the example flexible circuit of  FIG. 3A . 
         FIG. 4  depicts the assembly of the electronic device of  FIG. 2A  with the housing removed. 
         FIG. 5  depicts an example stack up that may be used to implement the touch sensor depicted in  FIG. 2A . 
         FIG. 6  depicts an example stack up that may be used to implement the force sensor depicted in  FIG. 2A . 
         FIG. 7  depicts a first alternative example of the electronic device of  FIG. 2A . 
         FIG. 8  depicts a second alternative example of the electronic device of  FIG. 2A . 
         FIG. 9  depicts a third alternative example of the electronic device of  FIG. 2A . 
         FIG. 10  depicts a fourth alternative example of the electronic device of  FIG. 2A . 
         FIG. 11  depicts a flow chart illustrating an example method for operating a device that includes a force sensor. This method may be performed using the electronic device of  FIGS. 1A-2B . 
         FIG. 12  depicts a flow chart illustrating an example method for assembling an electronic device. The method may assemble the electronic device of  FIG. 2A . 
         FIG. 13  depicts a fifth alternative example of the electronic device of  FIG. 2A . 
         FIG. 14  depicts a sixth alternative example of the electronic device of  FIG. 2A . 
         FIG. 15A  depicts an example cross-sectional view of the flexible circuit of  FIG. 14 , taken along line G-G of  FIG. 14 . 
         FIG. 15B  depicts a side view of an example stack up of the flexible circuit shown in  FIG. 15A . 
         FIG. 16  depicts a seventh alternative example of the electronic device of  FIG. 2A . 
     
    
    
     DETAILED DESCRIPTION 
     Reference will now be made in detail to representative embodiments illustrated in the accompanying drawings. It should be understood that the following descriptions are not intended to limit the embodiments to one preferred embodiment. To the contrary, it is intended to cover alternatives, modifications, and equivalents as can be included within the spirit and scope of the described embodiments as defined by the appended claims. 
     The description that follows includes sample systems, methods, apparatuses, and products that embody various elements of the present disclosure. However, it should be understood that the described disclosure may be practiced in a variety of forms in addition to those described herein. 
     Earphones that include mechanical input devices (such as buttons, dials, switches, sliders, and so on) disposed on, or accessible through, a housing surface may be challenging to operate as a user may not be able to see the mechanical input devices while the earphones are worn. Some earphones may attempt to solve this by using input mechanisms that detect one or more taps from a user. However, though a user may be able to activate (e.g., provide input to) the earphone more easily by tapping than by locating a button to press, tapping the earphone may conduct sound. This may be unpleasant to the user. This may also disrupt audio output produced by the earphone. Further, in implementations where the earphone includes one or more microphones, the tapping may be picked up by a microphone. 
     The following disclosure relates to force-activated electronic devices, such as earphones. Embodiments may estimate or determine non-binary amounts of force applied to a force input surface on a housing by measuring a change in capacitance between first and second force electrodes. A spring member within the housing biases the first force electrode towards the housing while allowing it to move towards the second force electrode when the force is applied. In this way, the earphone can be activated by a force without requiring or using external mechanical input devices and/or without tapping. 
     In some implementations, an earphone may detect a touch on a touch input surface of the housing. In some embodiments, the earphone may determine a non-binary amount of input force upon detection of the touch. In this way, the earphone may improve power usage over implementations where force determination is performed more frequently. For example, the earphone may be a battery powered device and the improved power usage may improve battery life. In other implementations, the earphone may use signals from both a touch sensor and a force sensor to determine applied force by only using force detected when a touch is also detected. 
     In a particular embodiment, the first and second force electrodes may be implemented as separate sections of a single flexible circuit. This flexible circuit may flex to allow the first force electrode to move toward the second force electrode when the force is applied. This flexible circuit may also flex to allow the first force electrode to move away from the second force electrode when the force is no longer applied. 
     In certain embodiments, an earphone may detect touch on a first side of a stem and force on the other side of the stem. The sides where touch and force are detected may be opposite and substantially orthogonal with respect to each other (oriented 180 degrees) such that a user may simultaneously contact both sides when squeezing the stem between the user&#39;s fingers. The earphone may determine a force and use the force if a touch is detected, potentially ignoring the determined force if a touch is not detected. In this way, the earphone may use the touch and force detection of the two sides together to control operation of the earphone. 
     In some examples, the two sides may be oriented substantially perpendicular (90 degrees) from the user&#39;s head or other body part when in use to prevent or mitigate interference between the user&#39;s head and one or more sensors used to detect touch and/or force. For example, this orientation may prevent the two sides from touching the user&#39;s head or face during use of the earphone. The user&#39;s head or face touching the two sides could be falsely interpreted as input. As such, this orientation may reduce false inputs by preventing the user&#39;s head or face from touching the two sides during use. 
     However, it is understood that this is an example. In various implementations, the sides may be configured in other arrangements. For example, the two sides may be positioned 45 degrees away from each other and respectively 135 degrees away from the user when the user is wearing the earphone. 
     These and other embodiments are discussed below with reference to  FIGS. 1A-9 . However, those skilled in the art will readily appreciate that the detailed description given herein with respect to these figures is for explanatory purposes only and should not be construed as limiting. 
       FIG. 1A  depicts a block diagram illustrating example functional relationships between example components that may be used to implement an electronic device  101 . The electronic device  101  may include a controller  132  that is operative to interpret various touches to and/or forces exerted upon the electronic device  101  as input. For example, the electronic device  101  may be an earphone with one or more input surfaces defined on a housing. The controller  132  may use one or more touch sensors  130  and/or force sensors  131  to detect touches on one or more of the input surfaces, force applied to one or more of the input surfaces, and so on. For example, the electronic device  101  may include one or more mutual capacitance touch sensors, self-capacitance touch sensors, mutual capacitance force sensors, self-capacitance force sensors, strain gauges, optical sensors, pressure sensors, proximity sensors, switches, temperature sensors, dome switches, displacement sensors, and so on. 
     The electronic device  101  may also include an antenna  106 , one or more non-transitory storage media  180  (which may take the form of, but is not limited to, a magnetic storage medium; optical storage medium; magneto-optical storage medium; read only memory; random access memory; erasable programmable memory; flash memory; and so on), and/or one or more other components. The controller  132  may execute instructions stored in the non-transitory storage medium  180  to perform various functions, such as using the touch sensor  130  to detect touch, using the force sensor  131  to detect applied force, using the antenna  106  to communicate with an associated device, and so on 
       FIG. 1B  depicts an example implementation of the electronic device  101 . As illustrated, in some implementations, the electronic device  101  may be an earphone. In this example, the electronic device  101  is a wireless earphone. However, it is understood that this is an example. In various implementations, the electronic device  101  may be any kind of electronic device, such as a mobile computing device, a stylus, and so on. Various configurations are possible and contemplated. 
     The electronic device  101  may include a housing including a speaker  102  and/or a speaker housing and a stem  103  and/or a stem housing. The stem  103  may define the input surfaces  104   a,    104   b.  A user may be able to touch, press, hold, squeeze, and/or otherwise interact with one or more of the input surfaces  104   a,    104   b.  This may allow the user to activate and/or otherwise provide touch, force, and/or other input to the electronic device  101 . 
     The speaker  102  may define an acoustic chamber in cooperation with an ear of a user. In some implementations, the speaker  102  may also include a microphone acoustic port  105 . 
     As illustrated, the input surfaces  104   a,    104   b  may be defined on opposite sides (i.e., located opposite each other) of the stem  103 . This positioning of the input surfaces  104   a,    104   b  with respect to each other may allow force to be applied by squeezing the input surfaces  104   a,    104   b.  As described above with respect to  FIG. 1A , the electronic device  101  may include a number of different sensors for detecting touch on and/or force applied to one or more of the input surfaces  104   a,    104   b.    
     For example, the electronic device  101  may detect a non-binary amount of force applied to one or more input surfaces  104   a,    104   b.  The amount of the force detected may be non-binary because the electronic device  101  is operative to determine an amount of the force that is applied within a range of force amounts rather than only a binary detection of whether or not force is applied. The electronic device  101  may interpret the applied force as a first input if the amount of the force is less than a force threshold. However, the electronic device  101  may interpret the force as a second input if the amount of the force at least meets the force threshold. 
     In some examples, the electronic device  101  may determine other information about touch or applied force. For example, the electronic device  101  (or controller or other processing unit thereof) may also determine an amount of time that a force is applied. The electronic device  101  may interpret force that is applied for an extended period of time as a different input than a force that is applied and then immediately released. In such an example, the electronic device  101  may interpret an applied force as multiple different kinds of input depending on the amount of the force that is applied, the amount of time that the force is applied, the direction that force is applied, and/or other aspects of the applied force. 
     In some implementations, the input surfaces  104   a,    104   b  may be indents in the stem  103 . This may provide a physical cue to guide a user to the input surfaces  104   a,    104   b.  However, it is understood that this is an example. In other implementations, the input surfaces  104   a,    104   b  may be otherwise configured without departing from the scope of the present disclosure. By way of illustration, in other implementations, the input surfaces  104   a,    104   b  may be raised portions of the stem  103 , ridges on the stem  103 , and so on without departing from the scope of the present disclosure. 
     For example, in some implementations, the input surfaces  104   a,    104   b  may be configured as protrusions from the stem  103 . In other implementations, the input surfaces  104   a,    104   b  may be physically contiguous with other sections of the stem  103  but may be indicated by a different color than the other sections of the stem  103 . In still other implementations, the input surfaces  104   a,    104   b  may be visually indistinguishable from other sections of the stem  103 . Various configurations are possible and contemplated. 
     In some examples, the electronic device  101  may include both a force sensor and a touch sensor. For example, the force sensor may be positioned adjacent one of the input surfaces  104   a,    104   b  and the touch sensor may be positioned adjacent the other of the input surfaces  104   a,    104   b.  As such, the electronic device  101  may be operative to determine both touch and force to the input surfaces  104   a,    104   b.    
     In various examples, the electronic device  101  may use the force sensor to determine a non-binary amount of force applied only upon detection of a touch. This may prevent false readings, as objects other than a user could exert force on the housing. This may also reduce power consumption as compared to operating the force sensor more often or continuously. In examples where the electronic device  101  is powered by one or more batteries and/or is otherwise portable, this reduced power consumption may conserve the life of batteries and/or other components. 
     In other examples, the electronic device  101  may use the force sensor and a touch sensor to determine the amount of the force. For example, the electronic device  101  may use the force sensor regardless whether or not touch is detected, but may only use signals from the force sensor when a touch is detected. 
     In still other examples, force sensors may be positioned adjacent to both input surfaces  104   a,    104   b.  Force sensors may be operated at different power levels. The higher the power level at which a force sensor is operated, the higher a signal to noise ratio of force data from a force sensor may be. Conversely, the lower the power level at which a force sensor is operated, the lower the signal to noise ratio of the force data may be, resulting in less accurate force data due to higher noise. Higher signal to noise ratio is desirable whereas higher power is not. As force data from two force sensors may be evaluated in this example to determine non-binary amounts of applied force, the force sensors may operate in a manner that is less accurate but uses less power. This may be due to the ability to combine the force data for a higher signal to noise ratio despite the lower powered operation of the individual force sensors. The use of the multiple sets of force data may make up for the less accurate but lower powered operation of either force sensor individually. 
     In yet other examples, multiple force sensors may be used for other purposes than increasing signal to noise ratios by averaging their data. For example, data from multiple force sensors may enable determination of force vector information. In other words, multiple force sensors may enable determination of both magnitude and direction of force. This force vector information may be used to discriminate between intentional application of force to provide input and accidental application of force, such as a user adjusting a position of the electronic device  101 . Various configurations are possible and contemplated without departing from the scope of the present disclosure. 
     As illustrated, the input surfaces  104   a,    104   b  may be substantially orthogonal to the microphone acoustic port  105 . This may prevent the input surfaces  104   a,    104   b  from touching a user&#39;s head during use of the electronic device  101 . 
       FIG. 1C  depicts a user  190  using the example electronic device  101  of  FIG. 1B . As shown, the user may touch and exert force on the input surfaces  104   a,    104   b  simultaneously by squeezing the input surfaces  104   a,    104   b  between the user&#39;s finger and thumb. As also shown, the input surfaces  104   a,    104   b  are positioned to prevent contact with the user&#39;s head during use of the electronic device  101 . 
       FIG. 1D  depicts the electronic device  101  forming an acoustic chamber  191  with an ear canal  192  of the user  190 . The acoustic chamber  191  may be defined by the speaker  102  of the electronic device  101  at one side of the ear canal  192  of the user  190  and by the eardrum  193  of the user  190  at the other side of the ear canal  192  of the user  190 . The electronic device  101  may transmit sound waves into the acoustic chamber  191  through an output acoustic port  121 . In this way, the user  190  may be able to hear the sound waves without overly disturbing people in the environment around the user  190 . 
       FIG. 2A  depicts an example cross-sectional view of the electronic device  101 , taken along line A-A of  FIG. 1B . An assembly  170  disposed within the stem  103  may include a flexible circuit  108 , a spring member  109 , an attachment spring member  107 , an antenna  106 , and a controller  132 . 
     The flexible circuit  108  may form a touch sensor  130  adjacent the input surface  104   a  and a force sensor  131  adjacent the input surface  104   b.  As such, the input surface  104   a  may be a touch input surface and the input surface  104   b  may be a force input surface. 
     In various implementations, force applied to the force input surface may be determined or estimated upon detection of a touch to the touch input surface. This may reduce power consumption over implementations where force detection is constantly or more frequently performed. 
     In other examples, the force sensor  131  and touch sensor  130  may be used to determine the amount of the force. For example, the force sensor  131  may be operated regardless whether or not touch is detected, but signals from the force sensor  131  may only be used when the touch sensor  130  detects a touch. This may ensure that a user intentionally applied the force. 
     The flexible circuit  108  may include multiple circuitry sections that are connected to each other. For example, as shown, the flexible circuit  108  may include a first circuitry section  111 , a second circuitry section  113 , and a third circuitry section  112 . The touch sensor  130  may be formed by the first circuitry section  111 . The force sensor  131  may be formed by the second circuitry section  113  and the third circuitry section  112 . 
     The flexible circuit  108  may be able to flex, bend, or otherwise deform to allow the second circuitry section  113  to move toward the third circuitry section  112  when a force is applied to the housing, such as the force input surface. This may reduce a gap  114  (which may be an air gap or otherwise be filled with a dielectric material such as silicone) between the second circuitry section  113  and the third circuitry section  112 . The flexible circuit  108  may also be able to flex, bend, or otherwise deform to allow the second circuitry section  113  to move away from the third circuitry section  112  when the force is no longer applied.  FIG. 2B  depicts the electronic device  101  of  FIG. 2A  when a force is applied to the input surfaces  104   a,    104   b.    
     With reference to  FIGS. 2A and 2B , a spring member  109  may be disposed within the stem  103 . The spring member  109  may bias the second circuitry section  113  toward the force input surface of the stem  103 . In other words, the spring member  109  may maintain the second circuitry section  113  at an initial position (shown) in the absence of force, allow the second circuitry section  113  to move when force is applied that moves the stem  103 , and allows the second circuitry section  113  to return to the initial position when the force is no longer applied. The spring member  109  may also bias the first circuitry section  111  toward the touch input surface of the stem  103 . 
     The spring member  109  may be a torsion spring and/or any other kind of spring. The spring member  109  may be formed of metal, plastic, a combination thereof, and so on. The spring member  109  may include a first arm  110   a  and a second arm  110   b  such that the spring member  109  may have an M-shaped cross section. The first arm  110   a  may bias the first circuitry section  111  toward the touch input surface of the stem  103 . The second arm  110   b  may bias the second circuitry section  113  toward the force input surface of the stem  103 . In other implementations, the spring member  109  may be shaped otherwise, such as embodiments where the spring member  109  has a C-shaped cross-section, a U-shaped cross-section, and so on. 
     Various portions of the flexible circuit  108  may be coupled or connected to the spring member  109 . For example, adhesive may couple the flexible circuit  108  to the spring member  109 , the first circuitry section  111  to the first arm  110   a,  the second circuitry section  113  to the second arm  110   b,  and so on. 
     As shown, the first circuitry section  111  is positioned between the first arm  110   a  and an internal surface  171  of the stem  103 . As also shown, the second arm  110   b  is shown positioned between the second circuitry section  113  and the internal surface  171  of the stem  103 . However, these are examples. In various implementations, these positions may be reversed and/or otherwise changed without departing from the scope of the present disclosure. 
     This configuration of the flexible circuit  108  and the spring member  109  may allow the touch sensor  130  and/or the force sensor  131  to be disposed within the stem  103  without being laminated and/or otherwise affixed to the stem  103 . This may simplify manufacture of the electronic device  101 . 
     The flexible circuit  108  may be coupled to an attachment spring member  107  (the spring member  109  being a movement spring member since the spring member  109  facilitates movement rather than attaching the flexible circuit  108 ) or other attachment member, such as using adhesive. The attachment spring member  107  may clamp or otherwise attach around an antenna  106 . The antenna  106  may be an assembly including an antenna carrier with an antenna resonator made of conductive material (such as gold, silver, copper, alloys, or the like) disposed thereon. The antenna  106  may be held in place by the stem  103 . By being coupled to the antenna  106 , other elements (such as the attachment spring member  107 , the flexible circuit  108 , and the spring member  109 ) may be held in place as well. 
     Although the above illustrates and describes the attachment spring member  107  as attached around the antenna  106 , it is understood that this is an example. In other implementations, the attachment spring member  107  and/or other elements (such as the flexible circuit  108 , the spring member  109 , and so on) may be attached to other components without departing from the scope of the present disclosure. For example, in some implementations, the electronic device  101  may include a battery pack. In such an implementation, the attachment spring member  107  may be attached to the battery pack. 
     With respect to  FIGS. 2A and 2B , a controller  132  or other processor or processing unit (or other control circuitry) may also be disposed in the stem  103 . In some implementations the controller  132  may be an integrated circuit, a SIP (a system in a package or “SIP” may be a number of integrated circuits enclosed in one or more chip carrier packages that may be stacked using package on package), and so on. The controller  132  may be electrically and/or otherwise communicably coupled to various portions of the flexible circuit  108 . The controller  132  may receive and/or evaluate touch data from the touch sensor  130 , receive and/or evaluate force data from the force sensor  131 , determine one or more touches using the touch data, determine a non-binary amount of applied force using the force data (and/or other information about the force, such as a duration that the force is applied), and so on. The controller  132  may be connected to a non-transitory storage medium that may store instructions executable by the controller  132 . 
     In various implementations, the controller  132  may only use the force sensor  131  to detect a force applied to the stem  103  or other portion of the housing (such as the input surface  104   b ) when the touch sensor detects a touch on the stem  103  or other portion of the housing (such as the input surface  104   a ). In some examples, the touch is on a first area of the housing and the force is applied to a second area of the housing. In various examples, the first area is located opposite the second area. In a number of examples, the first area and the second area are both positioned approximately 90 degrees from a user&#39;s head during use of the earphone. In various examples, the touch sensor  130  is inoperable to detect touches on the second area. In a number of examples, the controller  132  is operative to interpret the force as multiple different kinds of input. 
     Although the above illustrates and describes inputs as touches on and/or force applied to the input surfaces  104   a,    104   b,  it is understood that this is an example. In various implementations, the electronic device  101  may be operable to detect touches on and/or force applied to other portions of the housing without departing from the scope of the present disclosure. 
     For example, the stem  103  may move when force is applied to areas orthogonal to the input surfaces  104   a,    104   b.  This may cause the gap  114  to increase instead of decrease. Regardless, this may change the capacitance between the second circuitry section  113  and the third circuitry section  112 . The non-binary amount of this force may thus be determined using the force data represented by the change in the mutual capacitance. 
     In some implementations, this change may be opposite the change in the mutual capacitance resulting from force exerted on the input surface  104   b.  As such, the location that the force is exerted may be determined based on the change in the mutual capacitance. Various configurations are possible and contemplated without departing from the scope of the present disclosure. 
     Although the above is illustrated and described in the context of a gap  114  between the second circuitry section  113  and the third circuitry section  112  that may reduce when a force is applied to the input surfaces  104   a,    104   b  and increase when the force is no longer applied to the input surfaces  104   a,    104   b,  it is understood that this is an example. In other examples, electrodes may be positioned such that a gap between the electrodes increases when a force is applied to the input surfaces  104   a,    104   b  and reduce when the force is no longer applied to the input surfaces  104   a,    104   b.  By way of illustration, such electrodes may be positioned adjacent the controller  132  and the internal surface  171  of the stem  103 . Various configurations are possible and contemplated without departing from the scope of the present disclosure. 
     The flexible circuit  108  may be a flexible printed circuit board (e.g., a “flex”). In some implementations, the flexible circuit  108  may be formed of conductive material such as copper, silver, gold, or other metallic traces formed on a dielectric, such as polyimide or polyester. 
     The first circuitry section  111  that forms the touch sensor  130  may include one or more touch electrodes. For example, the first circuitry section  111  may include a touch drive electrode and a touch sense electrode. A touch on the touch input surface may be determined using a change in mutual capacitance of the touch drive electrode and the touch sense electrode. By way of another example, the first circuitry section  111  may include a single touch electrode and a touch to the touch input surface may be determined using a change in the self-capacitance of the single touch electrode. 
     The second circuitry section  113  that forms the force sensor  131  may include a first force electrode and the third circuitry section  112  may include a second force electrode. For example, in some implementations, the first force electrode may be a force drive electrode and the second force electrode may be a force sense electrode. In other implementations, these may be reversed. Changes in mutual capacitance between the second circuitry section  113  and the third circuitry section  112  (such as between first and second force electrodes respectively included in the second circuitry section  113  and the third circuitry section  112 ) may be used to determine a non-binary amount of the force. 
     As such, in some implementations, both the touch sensor  130  and the force sensor  131  may be capacitance sensors. Both may be mutual capacitance sensors. However, it is understood that this is an example. In various implementations, one or more of the touch sensor  130  and the force sensor  131  may be a self-capacitance sensor and/or another kind of sensor without departing from the scope of the present disclosure. 
     For example,  FIG. 3A  depicts a first side of an example flexible circuit  108  that may be used to implement the electronic device  101  depicted in  FIG. 2A .  FIG. 3B  depicts a second side of the example flexible circuit  108  shown in  FIG. 3A .  FIGS. 3A and 3B  illustrate how a single sheet or other structure of dielectric material (such as polyimide, polyester, and so on) may be configured to form the first circuitry section  111 , the second circuitry section  113 , and the third circuitry section  112 ; components such as the controller  132 , the touch drive electrode  117 , the touch sense electrode  118 , the first force electrode  120 , and the second force electrode  119  may be coupled thereto; and conductive material such as metal traces may be added thereto to connect such components. This single sheet or other structure may then be bent, folded, and/or otherwise deformed to configure the flexible circuit  108  as shown in  FIGS. 2A-2B . 
     For example, the flexible circuit  108  may be folded along line C-C so that the first circuitry section  111  that includes the touch drive electrode  117  and the touch sense electrode  118  is positioned approximately perpendicular to a central portion of the flexible circuit  108 . Similarly, the flexible circuit  108  may be folded along lines D-D and F-F so that the second circuitry section  113  that includes the first force electrode  120  and the third circuitry section  112  that includes the second force electrode  119  are positioned approximately perpendicular to the central portion of the flexible circuit  108 . The flexible circuit  108  may then be folded along line E-E so that that the second circuitry section  113  that includes the first force electrode  120  and the third circuitry section  112  that includes the second force electrode  119  are positioned approximately parallel to each other. Finally, the flexible circuit  108  may be folded along line B-B to position the controller  132  over the central portion of the flexible circuit  108 . This may result in a configuration similar to that shown in  FIGS. 2A-2B  and  FIG. 4 . 
       FIG. 4  depicts the assembly  170  of the electronic device  101  of  FIG. 2A , including the antenna  106 , with the housing removed.  FIGS. 2A-2B  illustrate the portions of the spring member  109 , the first arm  110   a,  the first circuitry section  111 , the second arm  110   b,  and the second circuitry section  113  that contact the stem  103  as substantially flat. However, it is understood that this is an example and is depicted in this fashion for the purposes of simplicity and clarity. In various implementations, various features (such as one or more protrusions, domes, and/or other features) may be configured on or between one or more of these components without departing from the scope of the present disclosure. Various configurations are possible and contemplated. 
       FIG. 5  depicts an example stack up that may be used to implement the touch sensor  130  depicted in  FIG. 2A . The orientation of the stack up may correspond to the position of the stem  103 , the first circuitry section  111 , and the first arm  110   a  illustrated in  FIG. 2A . The stack up may include the stem  103 , the first circuitry section  111 , adhesive  115 , and the first arm  110   a.  The first circuitry section  111  may include one or more touch drive electrodes  117  and touch sense electrodes  118  positioned on or within a dielectric  116  (such as polyimide, polyester, and so on). 
     A touch of a user on the stem  103  may alter a capacitance between the touch drive electrode  117  and the touch sense electrode  118 . As illustrated in  FIG. 3 , a controller  132  may be electrically connected to the touch drive electrode  117  and the touch sense electrode  118  and may monitor the capacitance between the touch drive electrode  117  and the touch sense electrode  118  to determine when a touch occurs using changes in the capacitance. 
     The touch drive electrode  117  and the touch sense electrode  118  are illustrated as having a particular configuration and orientation with respect to each other. The configuration and orientation of the touch drive electrode  117  and the touch sense electrode  118  with respect to each other may affect the capacitance between the touch drive electrode  117  and the touch sense electrode  118  and how that capacitance changes when a user touches the stem  103 . The touch drive electrode  117  and the touch sense electrode  118  may be arranged in a variety of different configurations and orientations to obtain specific properties with respect to the capacitance between the touch drive electrode  117  and the touch sense electrode  118  and how that capacitance changes when a user touches the stem  103 . 
       FIG. 6  depicts an example stack up that may be used to implement the force sensor  131  depicted in  FIG. 2A . The orientation of the stack up may correspond to the position of the stem  103 , the second arm  110   b,  the second circuitry section  113 , the third circuitry section  112 , the attachment spring member  107 , and the antenna  106  in  FIG. 2A . The stack up may include the antenna  106 , the attachment spring member  107 , adhesive  115 , the third circuitry section  112 , the gap  114 , the second circuitry section  113 , adhesive  115 , the second arm  110   b,  and the stem  103 . The second circuitry section  113  may include one or more first force electrodes  120  positioned on or within a dielectric  116  (such as polyimide, polyester, and so on). The third circuitry section  112  may include one or more second force electrodes  119  positioned on or within a dielectric  116  (such as polyimide, polyester, and so on). In some implementations, the first force electrode  120  may be a force drive electrode and the second force electrode  119  may be a force sense electrode. In other implementations, the first force electrode  120  may be a force sense electrode and the second force electrode  119  may be a force drive electrode. 
     Force exerted by a user on the stem  103  may alter the gap  114  between the first force electrode  120  and the second force electrode  119 . Altering the gap  114  between the first force electrode  120  and the second force electrode  119  may alter a capacitance between the first force electrode  120  and the second force electrode  119 . As illustrated in  FIG. 3 , a controller  132  may be electrically connected to the first force electrode  120  and the second force electrode  119  and may monitor the capacitance between the first force electrode  120  and the second force electrode  119  to determine or estimate a non-binary amount of the force that is applied using the changes in the capacitance. 
     The first force electrode  120  and the second force electrode  119  are illustrated as having a particular configuration and orientation with respect to each other. The configuration and orientation of the first force electrode  120  and the second force electrode  119  with respect to each other may affect the capacitance between the first force electrode  120  and the second force electrode  119  and how that capacitance changes when a user applies force to the stem  103 . The first force electrode  120  and the second force electrode  119  may be arranged in a variety of different configurations and orientations to obtain specific properties with respect to the capacitance between the first force electrode  120  and the second force electrode  119  and how that capacitance changes when a user applies force to the stem  103 . 
       FIGS. 2A-6  illustrate and describe touch sensors  130  and force sensors  131  having particular configurations and particular manners of operation. However, it is understood that these are examples and that other implementations are possible and contemplated. For example, the touch sensor  130  may be replaced with one or more proximity sensors without departing from the scope of the present disclosure. 
     By way of another example, in some implementations, one or more strain gauges may be laminated and/or otherwise coupled or attached to internal areas of the housing adjacent one or more of the input surfaces  104   a,    104   b.  An applied force may cause strain in or on the housing. The strain gauges may detect the strain. Such strain data may be evaluated to determine a non-binary amount of the force exerted. 
     By way of yet another example, in some implementations, one or more touch or force sensors (and/or one or more touch sensing electrodes of such a touch or force sensor) may be laminated and/or otherwise coupled or attached to internal areas of the housing (and/or embedded within the housing) adjacent one or more of the input surfaces  104   a,    104   b.  The housing may deform from an initial position when a force is applied and return to the initial position when the force is removed. As such, the housing may function as the spring member  109  in some embodiments. The touch or force sensors may detect the deformation and output signals that may be used to determine a touch and/or an amount of the applied force. 
     In some examples, one or more switches, such as one or more dome switches, may be positioned adjacent to the input surfaces  104   a,    104   b.  Applied force may deform the housing, which may collapse the domes and close the switch. Output from the switches may be used to determine a non-binary amount of the applied force. 
     In various examples, one or more optical sensors may be disposed in the housing. The optical sensors may detect movement of the housing caused by the application of force. In such an example, output from the optical sensors may be evaluated to determine a non-binary amount of a force that is applied. 
     In a number of examples, one or more temperature sensors may be used to detect temperature changes of the input surfaces  104   a,    104   b.  When the user  190  exerts different amounts of force on the input surfaces  104   a,    104   b,  the body of the user  190  may change the temperature of the input surfaces  104   a,    104   b.  For example, body heat of the user  190  may thermally conduct to the input surfaces  104   a,    104   b  when the user  190  exerts force on the input surfaces  104   a,    104   b,  raising the temperature of the input surfaces  104   a,    104   b.  This thermally conducted heat may increase the temperature of the input surfaces  104   a,    104   b  higher the more force the user  190  exerts. As such, a non-binary amount of the force may be determined based on the temperature changes detected by the temperature sensors. 
     In some examples, one or more pressure sensors may be disposed within the housing. The pressure sensor may measure the pressure of an internal cavity defined within the housing. Force applied to one or more of the input surfaces  104   a,    104   b  may change the pressure of the internal cavity. The electronic device  101  may determine a non-binary amount of the force based on pressure changes detected by the pressure sensor. 
     In various examples, force may be determined using self-capacitance of a force electrode. By way of illustration,  FIG. 7  depicts a first alternative example of the electronic device  101  of  FIG. 2A . The electronic device  701  may include a stem  703  of a housing that defines a touch input surface  704   a  and a force input surface  704   b.  The electronic device  701  may also include a flexible circuit  708  with a first circuitry section  711  that forms a touch sensor  730  and a second circuitry section  712  that forms a force sensor  731 . The electronic device  701  may additionally include a spring member  709  with a first arm  710   a  that biases the first circuitry section  711  toward the touch input surface  704   a  and a second arm  710   b.    
     The second circuitry section  712  may include a force electrode. The force sensor  731  may monitor the self-capacitance of that force electrode. The second arm  710   b  may function as a ground that affects the self-capacitance depending on the size of the gap  714  between the second circuitry section  712  and the second arm  710   b.  A non-binary amount of force applied to the force input surface  704   b  may be determined using changes in the self-capacitance of the force electrode. 
     Additionally, the electronic device  701  may include an antenna assembly  706 , an attachment spring  707  that is coupled to the antenna assembly  706  and the flexible circuit  708 . Moreover, the electronic device  701  may include a controller  732  that is electrically and/or otherwise communicably coupled to the flexible circuit  708 . 
     In still other implementations, one or more of the components of the electronic device  701  may be changed. For example, in some implementations, the touch sensor  730  may be replaced with a proximity sensor. In such implementations, the force sensor  731  may be operated upon detection of proximity using the proximity sensor. 
     In other examples, the touch sensor  730  may be replaced with another force sensor. The force sensor may be similar to the force sensor  731 , the force sensor  131  of  FIGS. 2A-2B  (such as using third and fourth force electrodes that move with respect to each other when force is applied or removed where a non-binary amount of force may be determined based on changes in mutual capacitance between the third and fourth force electrodes), and/or otherwise configured. In such cases where multiple force sensors are used, touch or proximity may not be used to trigger operation of a force sensor. In such examples, the two force sensors may be operated more frequently. In some implementations, the two force sensors may be operated at a lower power that yields less accurate measurements. The less accuracy of the measurement may be compensated for by using the additional force data supplied from having multiple force sensors. 
     In some implementations, the touch input surface  704   a  and the force input surface  704   b  may be reversed. One or more of the touch sensor  730  or the force sensor  731  may be more sensitive to interference from proximity to a user&#39;s neck or other body part. As such, the respective sensor may be located so as to be as far from that body part as is possible to minimize interference. Various configurations are possible and contemplated without departing from the scope of the present disclosure. 
       FIG. 8  depicts a second alternative example of the electronic device  101  of  FIG. 2A . In this example, an electronic device  801  may electrically connect a flexible circuit  808  to a spring member  809  and an attachment spring member  807 . An insulator  840  may separate and/or electrically isolate the spring member  809  and the attachment spring member  807  from each other. Movement of a first arm  810   a  and a second arm  810   b  with respect to the attachment spring member  807  changes a capacitance between the spring member  809  and the attachment spring member  807 . In this example, the electronic device  801  may determine amounts of force applied using changes in capacitance between the spring member  809  and the attachment spring member  807 . As such, the spring member  809  and the attachment spring member  807  may function as electrodes of a force sensor. 
     In some implementations of this example, the attachment spring member  807  may be used as a drive force sensor and the spring member  809  may be used as a sense force electrode. However, in other examples, the roles of these electrodes may be reversed without departing from the scope of the present disclosure. 
       FIG. 9  depicts a third alternative example of the electronic device  101  of  FIG. 2A . In this example electronic device  901 , a controller  932  may be electrically connected to an attachment spring member  907  via a flexible circuit  908 . The controller  932  may be operative to monitor a self-capacitance of the attachment spring member  907 . A spring member  909  may also be coupled to the controller  932 , such as via a laser weld  941  so as to be operable as a ground for the attachment spring member  907 . Movement of a first arm  910   a  and a second arm  910   b  with respect to the attachment spring member  907  changes the self-capacitance of the attachment spring member  907 . In this example, the electronic device  901  may determine amounts of force applied using changes in the self-capacitance of the attachment spring member  907 . 
     Although this example uses the spring member  909  as a ground for the self-capacitance of the attachment spring member  907 , it is understood that this is an example. In other implementations, the spring member  909  may be electrically connected to the controller  932  such that the controller  932  is operable to monitor a mutual capacitance between the spring member  909  and the attachment spring member  907 . 
       FIG. 10  depicts a fourth alternative example of the electronic device  101  of  FIG. 2A . In this example electronic device  1001 , a spring member  1009  may allow a flexible circuit  1008  to move with respect to an attachment spring member  1007  when force is applied. The flexible circuit  1008  may be electrically coupled to the attachment spring member  1007 , which may be electrically isolated from the spring member  1009  by an insulator  1040 . Movement of a first arm  1010   a  and a second arm  1010   b  of the spring member  1009  may change a capacitance between the attachment spring member  1007  and circuitry included in the flexible circuit  1008 . The capacitance may be used to determine an amount of applied force. As such, the attachment spring member  1007  and/or one or more portions of the flexible circuit  1008  may form a force sensor and/or a touch sensor. 
     In other implementations, the insulator  1040  may be omitted. In such other implementations, the spring member  1009  may be coupled to the attachment spring member  1007  via a controller and a flexible circuit similar to how the controller  932  and the flexible circuit  908  of  FIG. 9  connect the spring member  909  and the attachment spring member  907 . Various configurations are possible and contemplated without departing from the scope of the present disclosure. 
     In various implementations, an earphone includes a housing, a flexible circuit disposed in the housing, and a controller disposed in the housing. The housing includes a speaker and a stem extending from the speaker and defining a touch input surface and a force input surface opposite the touch input surface. The flexible circuit includes a first circuitry section, a second circuitry section, and a third circuitry section. The flexible circuit flexes to allow the second circuitry section to move toward the third circuitry section when a force is applied to the force input surface and away from the third circuitry section when the force is no longer applied. The controller is operative to determine a touch to the touch input surface using a first change in a first mutual capacitance detected using the first circuitry section and a non-binary amount of the force using a second change in a second mutual capacitance detected using the second circuitry section and the third circuitry section. 
     In some examples, the controller uses the second circuitry section and the third circuitry section to determine the non-binary amount of the force upon determining the touch. In a number of examples, the earphone further includes an antenna disposed within the housing. The flexible circuit may be mounted to the antenna. In some examples, the speaker defines an acoustic port and the touch input surface and the force input surface are substantially orthogonal to the acoustic port. 
     In various examples, the controller determines an amount of time that the force is applied. In some examples, the controller interprets the force as a first input if the non-binary amount of the force is below a force threshold and a second input if the non-binary amount of the force at least meets the force threshold. 
     In some implementations, an electronic device includes a housing defining a force input surface, a first force electrode disposed within the housing, a second force electrode disposed within the housing, a spring member biasing the first force electrode toward the housing and allowing the first force electrode to move toward the second force electrode when an input force is applied to the force input surface, and a controller. The controller is operative to determine a non-binary amount of the force using a change in a capacitance between the first force electrode and the second force electrode. The capacitance may be a mutual capacitance. 
     In some examples, the electronic device further includes a touch sensor disposed within the housing. In some embodiments of such examples, the housing defines a touch input surface and the spring member includes a first arm that biases the touch sensor toward the touch input surface and a second arm that biases the first force electrode toward the force input surface. 
     In various examples, the spring member is at least one of metal or plastic. In a number of examples, the spring member has an M-shaped cross-section. 
     In some examples, the housing defines an additional force input surface. In some embodiments of such examples, the earphone further includes a third force electrode disposed within the housing adjacent to the additional force input surface and a fourth force electrode disposed within the housing. In such embodiments, the non-binary amount of the input force is determinable using the capacitance between the first force electrode and the second force electrode and an additional capacitance between the third force electrode and the fourth force electrode. 
     In a number of examples, the controller is operative to determine an additional force applied to an area of the housing other than the force input surface using an additional change in the capacitance between the first force electrode and the second force electrode. The area may be orthogonal to the force input surface and the additional change in the capacitance may be opposite the change in the mutual capacitance. 
       FIG. 11  depicts a flow chart illustrating an example method  1100  for operating a device that includes a force sensor. This method may be performed using the electronic device  101  of  FIGS. 1A-2B . 
     At  1110 , a controller determines whether or not a touch is detected. The controller may determine whether or not a touch is detected using one or more touch sensors. If so, the flow proceeds to  1120 . Otherwise, the flow returns to  1110  where the controller again determines whether or not a touch is detected. 
     At  1120 , after the touch is detected, the controller detects force data using a force sensor. The flow then proceeds to  1130  where the controller determines or estimates a non-binary amount of the force from the force data. The flow then returns to  1110  where the controller again determines whether or not a touch is detected. 
     Although the example method  1100  is illustrated and described as including particular operations performed in a particular order, it is understood that this is an example. In various implementations, various orders of the same, similar, and/or different operations may be performed without departing from the scope of the present disclosure. 
     For example, in some implementations, an action may be performed using the determined non-binary amount of the force. In some examples, the controller may interpret the determined non-binary amount of the force as an input. The controller may perform one or more actions according to the input corresponding to the determined non-binary amount of the force. 
     In various implementations, an earphone includes a housing, a spring member disposed within the housing that moves when a force is applied to the housing, a touch sensor coupled to the spring member, a touch sensor coupled to the spring member that is configured to detect a touch on the housing, a force sensor coupled to the spring member, and a controller that uses the force sensor and the touch sensor to determine an amount of the force. 
     In some examples, the touch is on a first area of the housing and the force is applied to a second area of the housing. In various such examples, the first area is located opposite the second area. In some such examples, the first area and the second area are both positioned approximately 90 degrees from a user&#39;s head during use of the earphone. 
     In various examples, the touch sensor is inoperable to detect touches on the second area. In some examples, the controller is operative to interpret the force as multiple different kinds of input. 
       FIG. 12  depicts a flow chart illustrating an example method  1200  for assembling an electronic device. The method  1200  may assemble the electronic device of  FIG. 2A . 
     At  1210 , an attachment spring member may be coupled to an antenna. At  1220 , a flexible circuit may be coupled to the attachment spring member. At  1230 , the flexible circuit may be coupled to a movement spring member. At  1240 , the movement spring member may be deformed. For example, the movement spring member may be deformed so that the assembly produced by  1210 - 1230  can fit into an opening in a housing. At  1250 , the assembly produced by  1210 - 1240  is inserted into a housing. At  1260 , the housing is sealed. 
     For example, sealing the housing may include coupling a cap to an opening in a housing into which the assembly produced by  1210 - 1240  is inserted. The opening may be in an end of a stem of a housing. The electronic device may be an earphone with a housing that includes the stem and a speaker. 
     Although the example method  1200  is illustrated and described as including particular operations performed in a particular order, it is understood that this is an example. In various implementations, various orders of the same, similar, and/or different operations may be performed without departing from the scope of the present disclosure. 
     For example, the method  1200  is illustrated and described as deforming the movement spring member and then inserting the assembly produced by  1210 - 1240  into a housing. However, in some implementations, insertion of the assembly into the housing may deform the movement spring member sufficiently to allow insertion. In such implementations, a separate operation to deform the movement spring member may be omitted. 
     As discussed above, in some examples, the touch sensor  130  of the electronic device  101  of  FIG. 2A  may be replaced and/or supplemented with another force sensor  131 . For example,  FIG. 13  depicts a fifth alternative example of the electronic device  101  of  FIG. 2A . Similar to the electronic device  101  of  FIG. 2A , an electronic device  1301  may include an assembly  1370  disposed within a stem  1303  that may include a flexible circuit  1308 , a spring member  1309 , an attachment spring member  1307 , an antenna  1306  or antenna assembly, and a controller  1332 . Unlike the electronic device  101  of  FIG. 2A , which includes the touch sensor  130 , the flexible circuit  1308  of the electronic device  1301  may form a first force sensor  1331   a  adjacent the input surface  1304   a  and a second force sensor  1331   b  adjacent the input surface  104   b.  As such, the input surface  1304   a  and the input surface  1304   b  may both be force input surfaces. 
     In various implementations, one or more touch sensors may also be included (such as laminated and/or otherwise combined with one or more components of one or more of the first force sensor  1331   a  or the second force sensor  1331   b  and/or otherwise located) and one or more forces applied to one or more of the force input surfaces may be determined or estimated upon detection of one or more touches. This may reduce power consumption over implementations where force detection is constantly or more frequently performed. 
     In various examples, the first force sensor  1331   a  and the second force sensor  1331   b  may be cooperatively used to determine the amount of the force. In other examples, the first force sensor  1331   a  and the second force sensor  1331   b  may be separately and/or independently used to determine the amount of the force. 
     The flexible circuit  1308  may include multiple circuitry sections that are connected to each other. For example, as shown, the flexible circuit  1308  may include a first circuitry section  1313   a,  a second circuitry section  1312   a,  a third circuitry section  1313   b,  and a fourth circuitry section  1312   b  The first force sensor  1331   a  may be formed by the first circuitry section  1313   a  and the second circuitry section  1312   a.  The second force sensor  1331   b  may be formed by the third circuitry section  1313   b  and the fourth circuitry section  1312   b.    
     The flexible circuit  1308  may be able to flex, bend, or otherwise deform to allow the first circuitry section  1313   a  to move toward the the second circuitry section  1312   a  and/or to allow the third circuitry section  1313   b  to move toward the fourth circuitry section  1312   b  when one or more forces are applied to the housing, such as to one or more of the force input surfaces. This may reduce a respective gap  1314   a,    1314   b  (which may be an air gap or otherwise be filled with a dielectric material such as silicone) between the first circuitry section  1313   a  and the second circuitry section  1312   a  and/or between the third circuitry section  1313   b  and the fourth circuitry section  1312   b.  The flexible circuit  1308  may also be able to flex, bend, or otherwise deform to allow the first circuitry section  1313   a  to move away from the second circuitry section  1312   a  and/or to allow the third circuitry section  1313   b  to move away from the fourth circuitry section  1312   b  when the force(s) is no longer applied. 
     As shown, the first circuitry section  1313   a  is positioned between a first arm  1310   a  of the spring member  1309  and an internal surface  1371  of the stem  1303 . As also shown, a second arm  1310   b  of the spring member  1309  is shown positioned between the third circuitry section  1313   b  and the internal surface  1371  of the stem  1303 . Additionally as shown, the second circuitry section  1312   a  and the fourth circuitry  1312   b  may be coupled to the attachment spring member  1307 . However, these are examples. In various implementations, these positions may be reversed and/or otherwise changed without departing from the scope of the present disclosure. 
     Although a specific configuration of components is illustrated and described above with respect to  FIG. 13 , it is understood that this is an example. Other configurations are possible and contemplated without departing from the scope of the present disclosure. For example, the first force sensor  1331   a  and/or the second force sensor  1331   b  may be replaced in other implementations and/or supplemented with one or more strain gauges (such as one or more piezoelectric strain gauges, other types of strain gauges, and so on), touch sensors, and so on. Various configurations are possible and contemplated without departing from the scope of the present disclosure. 
     Although the above is illustrated and described in the context of a gap  1314   a  between the second circuitry section  1313   a  and the third circuitry section  1312   a  and a gap  1314   b  between the third circuitry section  1313   b  and the fourth circuitry section  1312   b  that may reduce when a force is applied to the input surfaces  1304   a,    1304   b  and increase when the force is no longer applied to the input surfaces  1304   a,    1304   b,  it is understood that this is an example. In other examples, electrodes may be positioned such that a gap between the electrodes increases when a force is applied to the input surfaces  1304   a,    1304   b  and reduce when the force is no longer applied to the input surfaces  1304   a,    1304   b.  By way of illustration, such electrodes may be positioned adjacent the controller  1332  and the internal surface  1371  of the stem  1303 . Various configurations are possible and contemplated without departing from the scope of the present disclosure. 
       FIG. 14  depicts a sixth alternative example of the electronic device  101  of  FIG. 2A . An electronic device  1401  may include an assembly  1470  disposed within a stem  1403  and/or a stem that may include a flexible circuit  1408 , a deformable material  1461 , an antenna  1406  or antenna assembly (which may be coupled to the stem  1403 ), and a conductive object  1432  (which may be coupled to the stem  1403 ). The conductive object  1432  may be a controller at least partially encased and/or enclosed in conductive material, such as sputter. For example, the controller may be sputtered, plated, or deposited with conductive material. The flexible circuit  1408  may include one or more touch sensors and/or force sensors and/or other components positioned adjacent an input surface  1404   a.  As such, the input surface  1404   a  may be a touch and/or force surface. 
     The deformable material  1461  may be capable of deforming. For example, the deformable material  1461  may deform when force is applied to the input surface  1404   a  and thus to the deformable material  1461  via the flexible circuit  1408 , allowing the flexible circuit  1408  to move closer to the conductive object  1432 . The deformable material  1461  may also return to an un-deformed configuration when the force is no longer applied, allowing the flexible circuit  1408  to move further away to the conductive object  1432 . The deformable material may be formed of a foam, gel, spring member, and/or other material that is capable of deformation. 
     The electronic device  1401  may include one or more touch sensors  1430  and/or force sensors  1431 . For example, the flexible circuit  1408  may include one or more touch electrodes and/or other touch sensors, one or more force electrodes and/or other force sensors, and so on. The controller included at least partially within the conductive object  1432  may use one or more of the one or more touch sensors  1430  and/or force sensors  1431  to detect touch on the stem  1403 , estimate and/or determine a location of the touch, estimate and/or determine a duration of the touch, estimate and/or determine movement of the touch along the stem  1403 , estimate and/or determine a non-binary amount of force exerted on the stem  1403 , and so on. The controller included at least partially within the conductive object  1432  may interpret such touches, forces, locations, durations, movement, detections, estimations, determinations, combinations thereof, and so on as one or more inputs. For example, the controller included at least partially within the conductive object  1432  may interpret movement along the stem  1403  as an input to raise and/or lower a volume of media presented by the electronic device. Various configurations are possible and contemplated without departing from the scope of the present disclosure. 
     As discussed above, the flexible circuit  1408  may include a force electrode. In some examples, the conductive object  1432  may function as a ground for the force electrode such that a capacitance of the force electrode changes in proportion to the size of a gap  1414  between the flexible circuit  1408  and the conductive object 
     As shown, the flexible circuit  1408  may be coupled to the antenna  1406  and/or the conductive object  1432 . The flexible circuit  1408  may extend around multiple sides of the antenna  1406  and/or the conductive object  1432 . 
       FIG. 15A  depicts an example cross-sectional view of the flexible circuit  1408  of  FIG. 14 , taken along line G-G of  FIG. 14 .  FIG. 15B  depicts a side view of an example stack up of the flexible circuit shown in  FIG. 15A . With respect to  FIGS. 14 and 15A-15B , the flexible circuit  1408  may include one or more dielectric materials  1516 , one or more touch sensor electrodes  1518  disposed within the one or more dialectic materials  1516  facing (i.e. the direction in which the one or more touch sensor electrodes  1518  are capable of detecting touch) the stem  1403 , one or more force sensor electrodes  1520  disposed within the one or more dialectic materials  1516  facing the deformable material (i.e. the direction in which the one or more force sensor electrodes  1520  are capable of detecting capacitance related to proximity between the one or more force sensor electrodes  1520  and the conductive object  1432 ), and one or more shields  1522  disposed within the one or more dialectic materials  1516  between the one or more touch sensor electrodes  1518  and the one or more force sensor electrodes  1520 . 
       FIG. 15B  depicts a side view of an example stack up of the flexible circuit  1408  shown in  FIG. 15A . As shown, the flexible circuit  1408  may include multiple touch sensor electrodes  1518 . 
     This configuration illustrated in  FIGS. 14 and 15A-15B  and described above may enable the one or more touch sensors  1430  to detect a touch (and/or a location of such a touch, a duration of such a touch, movement of such a touch, and so on) on the stem  1403  according to one or more changes in capacitance of the one or more touch sensor electrodes  1518  caused by a conductive object touching the stem  1403 . This configuration may also enable the one or more force sensors  1431  to detect a non-binary amount of force exerted on the stem  1403  according to one or more changes in capacitance of the one or more force sensor electrodes  1520  caused by changes in proximity between the one or more force sensor electrodes  1520  and the conductive object  1432 . 
     Although the electronic device  1401  is illustrated and described above as including a particular configuration of components, it is understood that this is an example. In other implementations, other configurations may be used without departing from the scope of the present disclosure. For example, in some implementations, the flexible circuit  1408  may be flexible yet semi-rigid such that the flexible circuit  1408  is operable to deform and move toward the conductive object  1432  when one or more forces are applied to the stem  1403  and return to an un-deformed position when the one or more forces are no longer applied. Various configurations are possible and contemplated without departing from the scope of the present disclosure. 
     By way of another example,  FIG. 16  depicts a seventh alternative example of the electronic device  101  of  FIG. 2A . Similar to the electronic device  1401  of  FIG. 14 , the electronic device  1601  may include an assembly  1670  disposed within a stem  1603  and/or a stem that may include a flexible circuit  1608 , an antenna  1606  or antenna assembly (which may be coupled to the stem  1603  and/or the flexible circuit  1608 ), and a conductive object  1632  (which may be coupled to the stem  1603  and/or include one or more controllers at least partially enclosed therein). Further to the electronic device  1401  of  FIG. 14 , the flexible circuit  1608  may include one or more touch sensors and/or force sensors and/or other components positioned adjacent an input surface  1604   a.  As such, the input surface  1604   a  may be a touch and/or force surface. However, by way of contrast with the electronic device  1401  of  FIG. 14 , the electronic device  1601  may omit the deformable material  1461 . Instead, the electronic device  1601  may include a spring member  1609  disposed within the stem. 
     The spring member  1609  may be coupled to the conductive object  1632  (and/or the stem  1603  and/or other components in other implementations) and/or the flexible circuit  1608 . The spring member  1609  may bias the flexible circuit  1608  toward the stem  103 . In other words, the spring member  109  may maintain the flexible circuit  1608  at an initial position (shown) in the absence of force, allow the flexible circuit  1608  to move toward the conductive object  1632  when force is applied that moves the stem  103 , and allows the flexible circuit  1608  to return to the initial position when the force is no longer applied. The spring member  1609  may be formed of metal, plastic, a combination thereof, and so on. 
     The electronic device  1601  may include one or more touch sensors  1630  and/or force sensors  1631 . For example, the flexible circuit  1608  may include one or more touch electrodes and/or other touch sensors, one or more force electrodes and/or other force sensors, and so on. The controller included at least partially within the conductive object  1632  may use one or more of the one or more touch sensors  1630  and/or force sensors  1631  to detect touch on the stem  1603 , estimate and/or determine a location of the touch, estimate and/or determine a duration of the touch, estimate and/or determine movement of the touch along the stem  1603 , estimate and/or determine a non-binary amount of force exerted on the stem  1603 , and so on. The controller included at least partially within the conductive object  1632  may interpret such touches, forces, locations, durations, movement, detections, estimations, determinations, combinations thereof, and so on as one or more inputs. For example, the controller included at least partially within the conductive object  1632  may interpret movement along the stem  1603  as an input to raise and/or lower a volume of media presented by the electronic device. Various configurations are possible and contemplated without departing from the scope of the present disclosure. 
     As discussed above, the flexible circuit  1608  may include a force electrode. In some examples, the conductive object  1632  may function as a ground for the force electrode such that a capacitance of the force electrode changes in proportion to the size of a gap  1614  between the flexible circuit  1608  and the conductive object. 
     As shown, a first end of the flexible circuit  1608  may overlap a second end of the spring member  1609 . The flexible circuit may also be positioned between the antenna  1606  and the conductive object  1632 . 
     Although the electronic device  1601  of  FIG. 16  and the electronic device  1401  of  FIG. 14  are illustrated and described above as including particular configurations of components, it is understood that these are examples. In other implementations, other configurations may be used without departing from the scope of the present disclosure. For example, electronic device  1601  of  FIG. 16  and the electronic device  1401  of  FIG. 14  are illustrated and described above as including a touch sensor  1430 ,  1630  and a force sensor  1431 ,  1631  positioned adjacent to the input surface  1404   a,    1604   a.  However, in other implementations, such a touch sensor  1430 ,  1630  and/or a force sensor  1431 ,  1631  and/or one or more additional touch sensors  1430 ,  1630  and/or force sensors  1431 ,  1631  may instead and/or additionally be positioned adjacent to an input surface  1404   b,    1604   b  and/or otherwise located. Various configurations are possible and contemplated without departing from the scope of the present disclosure. 
     By way of another example, the electronic device  1601  of  FIG. 16  and the electronic device  1401  of  FIG. 14  are illustrated and described above as respectively including an antenna  1406 ,  1606  and a conductive object  1432 ,  1632 . However, in other implementations, one or more of these components may be omitted, combined, and so on. By way of illustration, in some implementations, an electronic device may include a controller at least partially encased and/or enclosed within conductive material, such as sputter. For example, the controller may be sputtered, plated, or deposited with conductive material. One or more portions of the conductive material may be removed in order to form one or more antennas and/or other components from the remaining conductive material. Various configurations are possible and contemplated without departing from the scope of the present disclosure. 
     In various implementations, an earphone may include a speaker housing; a speaker positioned in the speaker housing; a stem extending from the speaker housing, the stem defining an input surface; a conductive object disposed within the stem; a flexible circuit positioned between the stem and the conductive object; a deformable material positioned between the flexible circuit and the conductive object operable to deform when a force is applied to the input surface; a touch sensor electrode disposed within the flexible circuit facing the stem; a force sensor electrode disposed within the flexible circuit facing the deformable material; and a shield. The shield may be disposed between the touch sensor electrode and the force sensor electrode. 
     In some examples, the earphone may further include a controller that is operable to determine a first input to the earphone using a touch detected using the touch sensor electrode. In various such examples, the controller may be operable to determine a second input to the earphone using a non-binary amount of the force, the non-binary amount of the force determined according to a change in capacitance detected using the force sensor electrode. 
     In a number of examples, the earphone may further include a controller, the touch sensor electrode may include a first touch sensor electrode and a second touch sensor electrode, and the controller may be operable to detect a touch moving along the input surface using the first touch sensor electrode and the second touch sensor electrode. In various examples, the earphone may further include a controller that is operable to determine an input to the earphone using a touch detected using the touch sensor electrode and a non-binary amount of the force, the non-binary amount of the force determined according to a change in capacitance detected using the force sensor electrode. In some such examples, the conductive object may be the controller. In various such examples, the controller may be sputtered, plated, or deposited with conductive material. 
     In some examples, the earphone may further include an antenna assembly. In various such examples, the flexible circuit may extend between the conductive object and the antenna assembly. In a number of examples, the deformable material may be at least one of foam or gel. 
     In some implementations, an earphone may include a speaker housing; a speaker positioned in the speaker housing; a stem extending from the speaker housing, the stem defining an input surface; a conductive object disposed within the stem; a flexible circuit positioned between the stem and the conductive object; a spring member positioned between the flexible circuit and the conductive object operable to bias the flexible circuit toward the stem and allow the flexible circuit to move toward the conductive object when a force is applied to the input surface; a touch sensor electrode disposed within the flexible circuit facing the stem; a force sensor electrode disposed within the flexible circuit facing the spring member; and a shield. The shield may be disposed between the touch sensor electrode and the force sensor electrode. 
     In various examples, the spring member may be formed of metal. In a number of examples, a first end of the flexible circuit may overlap a second end of the spring member. In some examples, the earphone may further include an antenna assembly, the flexible circuit may be coupled to the antenna assembly, and the spring member may be coupled to the conductive object. In a number of such examples, the flexible circuit may be positioned between the antenna assembly and the conductive object. 
     In some examples, the conductive object may function as a ground for the force sensor electrode. In various examples, a capacitance of the force sensor electrode may change as the flexible circuit moves with respect to the conductive object. 
     In a number of implementations, an earphone may include a speaker housing; a speaker positioned in the speaker housing; a stem extending from the speaker housing, the stem defining an input surface; a conductive object disposed within the stem; a flexible circuit positioned between the stem and the conductive object; a member positioned between the flexible circuit and the conductive object operable to allow the flexible circuit to move with respect to the stem; a force sensor electrode disposed within the flexible circuit; and a controller. The controller may be operable to determine an input to the earphone using a change in capacitance detected using the force sensor electrode, the change in capacitance corresponding to a non-binary amount of a force applied to the input surface. 
     In some examples, the flexible circuit may be positioned around at least two sides of the conductive object. In various examples, the conductive object may be coupled to the stem. 
     As described above and illustrated in the accompanying figures, the present disclosure relates to force-activated electronic devices, such as earphones. A non-binary amount of a force applied to a force input surface defined by a housing is determinable using a change in capacitance between first and second force electrodes. A spring member disposed within the housing biases the first force electrode towards the housing and allows it to move towards the second force electrode when the force is applied. In some implementations, an earphone may detect touch on a touch input surface defined by the housing. In various examples of such an implementation, the earphone may determine the non-binary amount of the force upon detection of the touch. In other implementations, the earphone may use signals from both a touch sensor and a force sensor to determine applied force. In a particular embodiment, the first and second force electrodes may be implemented using separate sections of a single flexible circuit. This flexible circuit may flex to allow the first force electrode to move toward the second force electrode when the force is applied. This flexible circuit may also flex to allow the first force electrode to move away from the second force electrode when the force is no longer applied. 
     In the present disclosure, the methods disclosed may be implemented using one or more sets of instructions or software readable by a device. Further, it is understood that the specific order or hierarchy of steps in the methods disclosed are examples of sample approaches. In other embodiments, the specific order or hierarchy of steps in the method can be rearranged while remaining within the disclosed subject matter. The accompanying method claims present elements of the various steps in a sample order, and are not necessarily meant to be limited to the specific order or hierarchy presented. 
     The described disclosure may be provided as a computer program product, or software, that may include a non-transitory machine-readable medium having stored thereon instructions, which may be used to program a computer system (or other electronic devices) to perform a process according to the present disclosure. A non-transitory machine-readable medium includes any mechanism for storing information in a form (e.g., software, processing application) readable by a machine (e.g., a computer). The non-transitory machine-readable medium may take the form of, but is not limited to, a magnetic storage medium (e.g., floppy diskette, video cassette, and so on); optical storage medium (e.g., CD-ROM); magneto-optical storage medium; read only memory (ROM); random access memory (RAM); erasable programmable memory (e.g., EPROM and EEPROM); flash memory; and so on. 
     The foregoing description, for purposes of explanation, used specific nomenclature to provide a thorough understanding of the described embodiments. However, it will be apparent to one skilled in the art that the specific details are not required in order to practice the described embodiments. Thus, the foregoing descriptions of the specific embodiments described herein are presented for purposes of illustration and description. They are not targeted to be exhaustive or to limit the embodiments to the precise forms disclosed. It will be apparent to one of ordinary skill in the art that many modifications and variations are possible in view of the above teachings.

Metadata:
Filing Date: 20210331
Publication Date: 20221004
Grant Date: 20221004
Priority Date: 20180921
Inventors: HARJEE, Nahid
TWEHUES, BRIAN R.
SONGATIKAMAS, TEERA
LI, AONAN
OWENS, TRAVIS N.
CAMPIOTTI, KYLE J.
Assignee: APPLE INC
CPC Classifications: [{"code": "H03K17/975", "inventive": true, "first": false, "tree": "[]"}, {"code": "H04R1/1016", "inventive": true, "first": false, "tree": "[]"}, {"code": "H04R1/1041", "inventive": true, "first": false, "tree": "[]"}, {"code": "H03K2017/9613", "inventive": false, "first": false, "tree": "[]"}, {"code": "H03K17/962", "inventive": true, "first": true, "tree": "[]"}, {"code": "H04R1/1075", "inventive": true, "first": false, "tree": "[]"}, {"code": "H04R2420/07", "inventive": false, "first": false, "tree": "[]"}, {"code": "H04R2201/10", "inventive": false, "first": false, "tree": "[]"}, {"code": "G06F3/044", "inventive": true, "first": false, "tree": "[]"}, {"code": "H04R1/1041", "inventive": true, "first": true, "tree": "[]"}, {"code": "G06F2203/04105", "inventive": false, "first": false, "tree": "[]"}, {"code": "H03K17/9625", "inventive": true, "first": false, "tree": "[]"}, {"code": "H03K2217/96076", "inventive": false, "first": false, "tree": "[]"}, {"code": "H03K2217/960775", "inventive": false, "first": false, "tree": "[]"}, {"code": "H04R1/1016", "inventive": true, "first": false, "tree": "[]"}, {"code": "H04R1/1075", "inventive": true, "first": false, "tree": "[]"}, {"code": "H04R1/1041", "inventive": true, "first": true, "tree": "[]"}, {"code": "H04R2420/07", "inventive": false, "first": false, "tree": "[]"}, {"code": "G06F3/044", "inventive": true, "first": false, "tree": "[]"}, {"code": "G06F2203/04105", "inventive": false, "first": false, "tree": "[]"}]
Family ID: 76760522