Patent Publication Number: US-8541745-B2

Title: Methods and devices for clothing detection about a wearable electronic device

Description:
CROSS REFERENCE TO RELATED APPLICATIONS 
     This application is related to commonly assigned, U.S. application Ser. No. 13/297,662, entitled, “Display Device, Corresponding Systems, and Methods Therefor,” Cauwels, et al., inventors, filed concurrently herewith, and U.S. application Ser. No. 13/297,965, entitled, “Display Device, Corresponding Systems, and Methods for Orienting Output on a Display,” Dickinson, et al., inventors, filed concurrently herewith, which are incorporated by reference for all purposes. 
     BACKGROUND 
     1. Technical Field 
     This invention relates generally to electronic devices, and more particularly to wearable electronic devices. 
     2. Background Art 
     People are becoming more dependent upon portable electronic devices. Illustrating by example, a mobile telephone was once used only for making telephone calls. By contrast, people today rely upon “smart phones” to keep up with their calendars, address books, music collections, photo collections, and so forth. At the same time portable electronic devices are becoming more complex, their physical sizes and geometric form factors are becoming smaller. Modern portable electronic devices have developed to the point that it is common to have a small device that fits into a pocket and functions as a computing device, entertainment device, productivity device, and communication device. 
     These smaller, yet more powerful, devices are being used for many different applications in many different environments. It would be advantageous to be able to detect certain environments and adapt performance of an electronic device to better perform in a given environment. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG. 1  illustrates one explanatory electronic device configured in accordance with one or more embodiments of the invention. 
         FIG. 2  illustrates an exploded view of one explanatory electronic device with separable components configured in accordance with one or more embodiments of the invention. 
         FIG. 3  illustrates a schematic block diagram of one explanatory electronic device configured in accordance with one or more embodiments of the invention. 
         FIG. 4  illustrates a cut-away view of one explanatory electronic device configured in accordance with one or more embodiments of the invention. 
         FIG. 5  illustrates an exploded view of some internal components associated with one explanatory electronic device configured in accordance with one or more embodiments of the invention. 
         FIG. 6  illustrates a sectional view of one explanatory electronic device configured in accordance with one or more embodiments of the invention. 
         FIG. 7  illustrates a schematic block diagram of one explanatory wearable component suitable for use with an electronic device configured in accordance with one or more embodiments of the invention. 
         FIG. 8  illustrates a cut-away view of one explanatory wearable component suitable for use with an electronic device configured in accordance with one or more embodiments of the invention. 
         FIGS. 9-12  illustrate various stages of coupling between an explanatory wearable component and an explanatory electronic device configured in accordance with one or more embodiments of the invention. 
         FIG. 13  illustrates one explanatory electronic device having collapsible components configured in accordance with one or more embodiments of the invention. 
         FIG. 14  illustrates an explanatory wearable component having been separated from an explanatory electronic device configured in accordance with one or more embodiments of the invention. 
         FIG. 15  illustrates an exploded view of one explanatory electronic device having a display lens configured as an acoustic output transducer in accordance with one or more embodiments of the invention. 
         FIG. 16  illustrates one explanatory method of detecting clothing in a wearable electronic device in accordance with one or more embodiments of the invention. 
         FIG. 17  illustrates one explanatory method for performing an optional confirmation check whether a covering object is clothing in accordance with one or more embodiments of the invention. 
         FIG. 18  illustrates another explanatory method for performing an optional confirmation check whether a covering object is clothing in accordance with one or more embodiments of the invention. 
         FIG. 19  illustrates examples of operational mode and feature options that can be changed in a wearable device when covered by clothing in accordance with one or more embodiments of the invention. 
         FIG. 20  illustrates one explanatory wearable electronic device configured in accordance with one or more embodiments of the invention. 
         FIGS. 21-22  illustrate an explanatory use case for an illustrative wearable electronic device configured in accordance with one or more embodiments of the invention. 
     
    
    
     Skilled artisans will appreciate that elements in the figures are illustrated for simplicity and clarity and have not necessarily been drawn to scale. For example, the dimensions of some of the elements in the figures may be exaggerated relative to other elements to help to improve understanding of embodiments of the present invention. 
     DETAILED DESCRIPTION OF EMBODIMENTS OF THE INVENTION 
     Before describing in detail embodiments that are in accordance with the present invention, it should be observed that the embodiments reside primarily in combinations of method steps and apparatus components related to clothing detection in a wearable electronic device, such as an electronic device that can be worn on a wrist and, accordingly, covered by a sleeve. Any process descriptions or blocks in flow charts should be understood as representing modules, segments, or portions of code that include one or more executable instructions for implementing specific logical functions or steps in the process. Alternate implementations are included, and it will be clear that functions may be executed out of order from that shown or discussed, including substantially concurrently or in reverse order, depending on the functionality involved. Accordingly, the apparatus components and method steps have been represented where appropriate by conventional symbols in the drawings, showing only those specific details that are pertinent to understanding the embodiments of the present invention so as not to obscure the disclosure with details that will be readily apparent to those of ordinary skill in the art having the benefit of the description herein. 
     It will be appreciated that embodiments of the invention described herein may be comprised of one or more conventional processors and unique stored program instructions that control the one or more processors to implement, in conjunction with certain non-processor circuits, some, most, or all of the functions of clothing detection in a wearable electronic device as described herein. The non-processor circuits may include, but are not limited to, a radio receiver, a radio transmitter, signal drivers, clock circuits, power source circuits, and user input devices. As such, these functions may be interpreted as steps of a method to perform clothing detection by a wearable electronic device. Alternatively, some or all functions could be implemented by a state machine that has no stored program instructions, or in one or more application specific integrated circuits (ASICs), in which each function or some combinations of certain of the functions are implemented as custom logic. Of course, a combination of the two approaches could be used. Thus, methods and means for these functions have been described herein. Further, it is expected that one of ordinary skill, notwithstanding possibly significant effort and many design choices motivated by, for example, available time, current technology, and economic considerations, when guided by the concepts and principles disclosed herein will be readily capable of generating such software instructions and programs and ICs with minimal experimentation. 
     Embodiments of the invention are now described in detail. Referring to the drawings, like numbers indicate like parts throughout the views. As used in the description herein and throughout the claims, the following terms take the meanings explicitly associated herein, unless the context clearly dictates otherwise: the meaning of “a,” “an,” and “the” includes plural reference, the meaning of “in” includes “in” and “on.” Also, reference designators shown herein in parenthesis indicate components shown in a figure other than the one in discussion. Relational terms such as first and second, top and bottom, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. For example, talking about a device ( 10 ) while discussing figure A would refer to an element,  10 , shown in figure other than figure A. 
     Embodiments of the invention described below employ a combination of local sensors to determine whether clothing has covered a wearable electronic device. In one embodiment, a method for detecting clothing includes using a first sensor or sensors to detect whether a wearer is wearing the device. For example, a galvanic skin sensor can be used to determine that a wearer is wearing the device on their wrist. Alternatively, a tension sensor can be used in conjunction with a strap to determine whether the tension applied to the strap exceeds a predetermined threshold corresponding to a strap that has been secured about a wearer&#39;s limb. 
     A second sensor or sensors then determine whether the wearable electronic device is covered. For instance, an infrared sensor can be used to determine that the electronic device has been covered for an extended period of time. If a wearer straps the electronic device to a wrist, and then covers the device with a shirt or jacket sleeve, the second sensor or sensors can be configured to detect such coverage. 
     Once the second sensor or sensors detects that the device has been covered, in response to this detection, a third sensor or sensors can be used to prevent false positive coverage detection. For example, a third sensor can perform an additional determination of whether the wearable electronic device is covered with clothing. In one embodiment, an array of microphones disposed along the electronic device can be configured to detect a noise profile corresponding to a clothing object covering the electronic device. Where the device is covered by a jacket sleeve for instance, the microphones may detect an altered or muffled sound caused by the sleeve. Alternatively, the microphones may detect an altered acoustical spectrum during operation. If, for instance, an incoming call is received in a wearable communication device, and an on-board loudspeaker emits a sound, the microphones may detect that the clothing is altering the acoustic spectrum associated with this sound. This additional check provides a further confirmation that the object covering the electronic device is clothing, as opposed to a situation where the electronic device is merely placed in a box or drawer. 
     Where the confirmation check indicates that clothing is indeed covering the electronic device, a control circuit in the electronic device can be configured to adjust one or more device settings of the device. The adjustment can comprise changing an output notification of one or more loudspeakers of the wearable electronic device, such as changing the ring tone so that a user may better hear the device when alerts are emitted. Alternatively, the adjusting can comprise placing the device in a vibration mode so the user may feel the device when alerts are emitted. In another embodiment, where the user is near another wireless electronic device, such as a computer, television, media player, etc., the adjustment can comprise wirelessly delivering audio, video, or combinations thereof to the other electronic device. In so doing, the user can see, for example, video on the other device without the need for uncovering the wearable device. In another embodiment, the adjustment can comprise transmitting one or more notification messages. The device may answer incoming calls or messages, for example, with an automatic reply stating “The person you are calling has the device covered with clothing and may not hear the ring tone.” In yet another embodiment, the adjustment may comprise adjusting one or more of a pitch, tone, spectral content, pattern, volume, timbre, or combinations thereof of alert tones emitted by the wearable electronic device. The volume of a ring tone can be increased, moved to a pitch that is more likely to penetrate clothing, and so forth, in response to being covered. In yet another embodiment, the adjustment can comprise placing the device into a power saving mode. This list is illustrative only and is not exhaustive, as other adjustments will be readily apparent to those of ordinary skill in the art having the benefit of this disclosure. 
     To illustrate with a simple use case, presume that the wearable electronic device is a communication device (e.g., a mobile phone) and personal digital assistant configured to resemble a wristwatch, and that is wearable on the wrist. A person with such a wearable device may place it on their wrist and then don a coat before heading outdoors. The sleeve of the coat may, presumably, cover the wearable device. Embodiments of the present invention detect this coverage and automatically adjust one or more operational settings for more appropriate functionality in the covered environment. 
     Skin and tension sensors can confirm that the user is wearing the device. Infrared sensors can be used to determine that something is covering the device. Microphone arrays can detect muffled sounds to confirm that clothing is covering the device. A control unit can then use these inputs to conclude that clothing is covering the device. Additional sensors can be used to supplement the determination that the device is covered. The control unit can consider ambient temperature, time of day, weather, season, location of the device, whether the device is indoors or outdoors, and so forth. The operational mode of the device can then be altered for better performance. Options for changing the operational mode include: not engaging the display until the device is uncovered; increasing output loudspeaker gain to ensure the user could hear alerts, calls, and so forth; selection of appropriate ring tones and alerts that could be better heard or through clothing; employing ring tones and alerts that are spectrally altered to better penetrate through clothing; notifying the user that clothing is obscuring the device via vibration, alert beeps, and so forth; selection of a microphone or loudspeaker on the device from an array of microphones or speakers for optimum (least obscured) performance; replying to incoming communication with automatic messages indicating non-availability of the user; forwarding communication to other devices, e.g., car systems, speakers, displays, and so forth. 
     As will be described below, the sensors used with embodiments of the present invention can vary. In addition to those mentioned above, other sensors can be used to detect clothing. For example, cameras and imaging devices can be used to detect objects covering the device. Pressure sensors for detecting either covering or that the device is being worn can include capacitive sensors, piezo electric sensors, resistive pressure sensors, mechanical strain sensors, skin conductivity sensors, and so forth. 
     Where microphones are used to detect muffled sounds corresponding to acoustic profiles associated with clothing covering the device, those acoustic profiles can be configured to correspond to various types of clothing, e.g., wool, cotton, leather, and so forth. These acoustic profiles can be set in a factory and stored in the device for a match comparison. 
     For explanatory purposes below, the electronic device used in the figures is a wearable device configured as a wristwatch. However, it will be clear to those of ordinary skill in the art having the benefit of this disclosure that the sensors, control circuits, and associated modules used to detect clothing covering the device and to alter the operational mode of the device could be integrated into any of a number of portable electronic devices, including mobile telephones, personal digital assistants, smart phones, palm-top computers, tablet devices, portable computers, and so forth. As these latter devices can be placed in pockets and sleeves, they too can benefit from clothing detection embodiments described below. 
     Turning now to  FIG. 1 , illustrated therein is one explanatory example of an electronic device  100  suitable for use with clothing detection systems described herein. For illustration purposes and simplicity of discussion, the electronic device  100  used in many of the figures is configured as a wearable electronic device. For example, the electronic device  100  of  FIG. 1  is configured as a wristwatch having an active strap  102  and a detachable electronic module  101 . This electronic device  100  is useful for discussion purposes because wearable devices configured in accordance with embodiments described herein can perform additional functions that traditional electronic devices cannot. However, it will be clear to those of ordinary skill in the art having the benefit of this disclosure that the additional features are optional and can be used in some applications, while the clothing detection techniques can be applied to simpler, non-wearable devices without employing all of the advanced features of the illustrative wearable device. 
     As shown in  FIG. 2 , in one embodiment the detachable electronic module  101  can be configured so as to be selectively detachable from the active strap  102 . Accordingly, the detachable electronic module  101  so as to be used as a stand alone electronic device. For example, the detachable electronic module  101  can be configured with cellular communication capabilities and may be detached from the active strap  102  to be used more privately as a mobile telephone than if it were coupled to a wearer&#39;s wrist. In other embodiments, the active strap  102  can optionally be configured with mechanically configurable characteristics such that it can be used as a configurable stand when the electronic device  100  is placed on a table. Both the active strap  102  and the detachable electronic module  101  can be configured as “active” devices. An active device refers to a device that includes a power source and hardware. Active devices can include control circuits or processors as well. 
     In one or more embodiments, the detachable electronic module  101  can be detached from the active strap  102  so that it can be coupled with, or can communicate or interface with, other devices. For example, where the detachable electronic module  101  includes wide area network communication capabilities, such as cellular communication capabilities, the detachable electronic module  101  may be coupled to a folio or docking device to interface with a tablet-style computer. In this configuration, the detachable electronic module  101  can be configured to function as a modem or communication device for the tablet-style computer. In such an application, a user may leverage the large screen of the tablet-style computer with the computing functionality of the detachable electronic module  101 , thereby creating device-to-device experiences for telephony, messaging, or other applications. The detachable nature of the detachable electronic module  101  serves to expand the number of experience horizons for the user. 
     Turning back to  FIG. 1 , in one embodiment the detachable electronic module  101  includes a display  103  configured to provide visual output having a presentation orientation  104  associated therewith. The visual output can be text, pictures, video, audio, or other content. As will be shown in subsequent figures, in one or more embodiments, the electronic device  100  can be configured with various combinations of the following features: wide area network communication capabilities, e.g., cellular or other mobile communication capabilities; local area network communication capabilities, e.g., Bluetooth™ or other similar communication capabilities; voice call capabilities including conventional phone functionality, speaker phone functionality, or private mode capabilities via a wired or wireless headset; one or more wellness sensors, such as heart rate sensors, temperature sensors, or sweat sensors; context sensors, such as accelerometers, global positioning sensors, microphones, local infrared sensors, local light sensors, and local touch sensors; and other safety and security sensors and applications. These features can be integrated into the detachable electronic module  101 , the active strap  102 , or by way of a combination of the two when coupling the detachable electronic module  101  to the active strap  102  is both an electrical and mechanical coupling. 
     The detachable electronic module  101 , in one embodiment, is equipped with a first detachable electronic module extension  107  and a second detachable electronic module extension  108 . The detachable electronic module extensions  107 , 108  can be coupled to the housing of the detachable electronic module  101  by way of hinge. Accordingly, the first electronic module extension  107  can be hingedly coupled to a first side of the housing such that it extends distally from the first side of the housing, while the second electronic module extension  108  can be hingedly coupled to a second side of the housing that different from the first side, such that it extends distally from the second side of the housing. The hinged attachment allows the first electronic module extension  107  and the second electronic module extension  108  to selectively pivot from a closed position, where the electronic module extensions  107 , 108  are disposed against a rear, major face of the housing, to an angularly displaced open position extending distally outward from the housing. 
     The illustrative electronic device  100  of  FIGS. 1 and 2  includes a form factor that is thin, pleasing, functional, and practical. Exemplary dimensions of some of the components will aid in understanding the shape and size of one explanatory embodiment. For instance, the display  103  can be configured with a 1.6 inch diagonal dimension. The detachable electronic module  101  can have a length  105  of about 62 millimeters, and a width of about 49 millimeters. (The term “about” is used to refer to dimensions inclusive of manufacturing and component tolerances. For example, a measurement of 48.1 or 49.9 millimeters will be about 49 millimeters when the manufacturing tolerances are plus or minus 1 millimeter.) In this illustrative embodiment, the detachable electronic module extensions  107 , 108  have a width  109  of about 42 millimeters, and a length  110  of between 20 and 40 millimeters, depending upon the application. An illustrative detachable electronic module  101  with communication capabilities, wellness detectors, and audio capabilities can be formed with a thickness (into the page) of about 10 millimeters. The length  111  of the active strap  102  can vary based upon target wearer&#39;s wrist size or application. 
     Turning now to  FIG. 3 , illustrated therein is a schematic block diagram of various components and modules suitable for inclusion in the detachable electronic module  101 . It will be clear to those of ordinary skill in the art having the benefit of this disclosure that the components and modules can be used in different combinations, with some components and modules included and others omitted. Components or modules can be included or excluded based upon need or application. 
     A control circuit  301  is coupled to the display  103 . The control circuit  301  can be operable with a memory  302 . The control circuit  301 , which may be any of one or more microprocessors, programmable logic, application specific integrated circuit device, or other similar device, is capable of executing program instructions and methods described herein. The program instructions and methods may be stored either on-board in the control circuit  301 , or in the memory  302 , or in other computer readable media coupled to the control circuit  301 . The control circuit  301  can be configured to operate the various functions of the detachable electronic module  101 , and also to execute software or firmware applications and modules that can be stored in a computer readable medium, such as memory  302 . The control circuit  301  executes this software or firmware, in part, to provide device functionality. 
     The memory  302  may include either or both static and dynamic memory components, may be used for storing both embedded code and user data. One suitable example for control circuit  301  is the MSM7630 processor manufactured by Qualcomm, Inc. The control circuit  301  may operate one or more operating systems, such as the Android™ mobile operating system offered by Google, Inc. In one embodiment, the memory  302  comprises an 8-gigabyte embedded multi-media card (eMMC). 
     The control circuit  301 , which in one embodiment is disposed in the central housing of the detachable electronic module  101  and not within either the first detachable electronic module extension  107  or the second detachable electronic module extension  108 , can be configured to alter an operating mode of the electronic module to one of a plurality of functional modes. Functional modes of the detachable electronic module  101  can include a desktop mode, a telephone mode, a wristwatch mode, a health monitoring mode, a clock mode, a calendar mode, a gaming mode, or a media player mode. The control circuit  301  can be configured to select an appropriate mode based upon whether the detachable electronic module  101  is covered by clothing. Alternatively, in other embodiments, the control circuit  301  can select an operational mode from these functional modes by detecting an angularly displaced orientation of the first detachable electronic module extension  107 , the second detachable electronic module extension  108 , or combinations thereof. 
     The display  103  is configured to provide visual output, images, or other visible indicia to a user. In one embodiment, the display  103  comprises a 1.6 inch organic light emitting diode (OLED) device. In one embodiment, the display  103  comprises a touch sensor  312  to form touch sensitive display configured to receive user input across the surface of the display  103 . The display  103  can also be configured with a force sensor  310 . Where configured with both a touch sensor  312  and force sensor  310 , the control circuit  301  can determine not only where the user contacts the display  103 , but also how much force the user employs in contacting the display  103 . Where configured with a force sensor  310  but no touch sensitive capabilities, the display  103  can be used as a large “push button” or input control for the detachable electronic module  101 . In one embodiment, explained in more detail below with reference to  FIG. 15 , the outer lens of the display  103  can be configured with piezoelectric sensors  315  or other actuators to be used as both an input device and an acoustic transducer. 
     The touch sensor  312  can include a capacitive touch sensor, an infrared touch sensor, or another touch-sensitive technology. Capacitive touch-sensitive devices include a plurality of capacitive sensors, e.g., electrodes, which are disposed along a substrate. Each capacitive sensor is configured, in conjunction with associated control circuitry, e.g., control circuit  301  or another display specific control circuit, to detect an object in close proximity with—or touching—the surface of the display  103  or the housing of the detachable electronic module  101  by establishing electric field lines between pairs of capacitive sensors and then detecting perturbations of those field lines. 
     The electric field lines can be established in accordance with a periodic waveform, such as a square wave, sine wave, triangle wave, or other periodic waveform that is emitted by one sensor and detected by another. The capacitive sensors can be formed, for example, by disposing indium tin oxide patterned as electrodes on the substrate. Indium tin oxide is useful for such systems because it is transparent and conductive. Further, it is capable of being deposited in thin layers by way of a printing process. The capacitive sensors may also be deposited on the substrate by electron beam evaporation, physical vapor deposition, or other various sputter deposition techniques. For example, commonly assigned U.S. patent application Ser. No. 11/679,228, entitled “Adaptable User Interface and Mechanism for a Portable Electronic Device,” filed Feb. 27, 2007, which is incorporated herein by reference, describes a touch sensitive display employing a capacitive sensor. 
     The force sensor  310  can take various forms. For example, in one embodiment, the force sensor  310  comprises resistive switches or a force switch array configured to detect contact with either the display  103  or the housing of the detachable electronic module  101 . An “array” as used herein refers to a set of at least one switch. The array of resistive switches can function as a force-sensing layer, in that when contact is made with either the surface of the display  103  or the housing of the detachable electronic module  101 , changes in impedance of any of the switches may be detected. The array of switches may be any of resistance sensing switches, membrane switches, force-sensing switches such as piezoelectric switches, or other equivalent types of technology. In another embodiment, the force sensor  310  can be capacitive. One example of a capacitive force sensor is described in commonly assigned, U.S. patent application Ser. No. 12/181,923, filed Jul. 29, 2008, published as US Published Patent Application No. US-2010-0024573-A1, which is incorporated herein by reference. In yet another embodiment, piezoelectric sensors  315  can be configured to sense force as well. For example, where coupled with the lens of the display  103 , the piezoelectric sensors  315  can be configured to detect an amount of displacement of the lens to determine force. The piezoelectric sensors  315  can also be configured to determine force of contact against the housing of the detachable electronic module  101  rather than the display  103 . 
     A mobile communication circuit  303  can be included to provide wide area communication capabilities. Where included, the mobile communication circuit  303  is operable with the control circuit  301 , and is used to facilitate electronic communication with various networks, such as cellular networks, data networks, or the Internet. Note that it is possible to combine the control circuit  301 , the memory  302 , and the mobile communication circuit  303  into a single device or into devices having fewer parts while retaining the functionality of the constituent parts. 
     The mobile communication circuit  303 , which may be one of a receiver or transmitter, and may alternatively be a transceiver, operates in conjunction with the control circuit  301  to electronically communicate through a communication network. For example, in one embodiment, the mobile communication circuit  303  can configured to communicate through a traditional cellular network, such as a Code Division Multiple Access (CDMA) network or Global System for Mobile communication (GSM) network. Other examples of networks with which the communication circuit may communicate include Push-to-Talk (PTT) networks, proprietary networks, dual band CDMA networks, or Dual Band Universal Mobile Telecommunications System (UMTS) networks, and direct communication networks. 
     The mobile communication circuit  303  can be configured to provide messaging functionality to the detachable electronic module  101 . In one or more embodiments, the detachable electronic module can communicate with one or more social networking applications through the mobile communication circuit  303  as well. News feeds and other data can be received through the mobile communication circuit  303 . Moreover, context and location sensitive notifications can be sent and received via the mobile communication circuit  303 . 
     A battery  304  or other energy source can be included to provide power for the various components of the detachable electronic module  101 . While a battery  304  is shown in  FIG. 3 , it will be obvious to those of ordinary skill in the art having the benefit of this disclosure that other energy storage deices can be used instead of the battery  304 , including a fuel container or an electrochemical capacitor. The battery  304  can include a lithium ion cell or a nickel metal hydride cell, such cells having reasonably large energy capacity, wide operating temperature range, large number of charging cycles, and long useful life. The battery  304  may also include overvoltage and overcurrent protection and charging circuitry. In one embodiment, the detachable electronic module  101  includes two batteries, with a battery being stored in each of the detachable electronic module extensions  107 , 108 . In one embodiment, the battery  304  is configured as an 800 mAh lithium polymer cell. 
     In one or more embodiments, the battery  304  disposed within the first electronic module extension  107 , the second electronic module extension  108 , or combinations thereof, and not within the central housing of the detachable electronic module  101 . In such a configuration, the battery  304  is configured to deliver energy to electronic components, e.g., the control circuit  301 , memory  302 , display  103 , etc., each of which is disposed only within the central housing of the detachable electronic module  101 . 
     One or more microphones  305  can be included to receive voice input, voice commands, and other audio input. A single microphone can be included. Optionally, two or more microphones can be included for selective beam steering. For example a first microphone can be located on a first side  330  of the detachable electronic module  101  for receiving audio input from a first direction  332 . Similarly, a second microphone can be placed on a second side  331  of the detachable electronic module  101  for receiving audio input from a second direction  333 . As will be described below, an infrared sensor  314 , light sensor  306 , or other sensor can detect a direction in which a user is located. The control circuit  301  can then select between the first microphone and the second microphone to beam steer audio reception toward the user. Alternatively, the control circuit  301  processes and combines the signals from two or more microphones to perform beam steering. The one or more microphones  305  can be used for voice commands. When altering the presentation orientation of information presented on the display, the one or more microphones  305  can be configured to be responsive to the control circuit  301 . Accordingly, the control circuit  301  can switch between microphones upon altering the presentation orientation in response to the user input. 
     A light sensor  306  is configured to detect changes in optical intensity, color, light, or shadow in the near vicinity of the detachable electronic module  101 . For example, the light sensor  306  can be configured as an image sensing device that captures successive images about the device and compares luminous intensity, color, or other spatial variations between images to detect motion or the presence of an object near the detachable electronic module  101 . Such sensors can be useful in determining whether the detachable electronic module  101  is covered by clothing. Additionally, these sensors can determine at which side of the detachable electronic module  101  a user is standing. An infrared sensor  314  can be used in conjunction with, or in place of, the light sensor  306 . The infrared sensor  314  can be configured to operate in a similar manner, but on the basis of infrared radiation rather than visible light. The light sensor  306  and/or infrared sensor  314  can be used for gesture commands, as will be described with reference to subsequent figures. 
     A near field communication circuit  307  can be included for communication with local area networks. Examples of suitable near field communication circuits include Bluetooth communication circuits, IEEE 801.11 communication circuits, infrared communication circuits, magnetic field modulation circuits, and Wi-Fi circuits. 
     A global positioning system device  308  can be included for determining where the detachable electronic module  101  is located. (Note that the global positioning system device  308  can also be used to determine the spatial orientation of the detachable electronic module  101  in three-dimensional space by determining the change in position of the device relative to the earth.) The global positioning system device  308  is configured for communicating with a constellation of earth orbiting satellites or a network of terrestrial base stations to determine an approximate location. Examples of satellite positioning systems suitable for use with embodiments of the present invention include, among others, the Navigation System with Time and Range (NAVSTAR) Global Positioning Systems (GPS) in the United States of America, the Global Orbiting Navigation System (GLONASS) in Russia, and other similar satellite positioning systems. The satellite positioning systems based location fixes of the global positioning system device  308  autonomously or with assistance from terrestrial base stations, for example with assistance from a cellular communication network or other ground based network, or as part of a Differential Global Positioning System (DGPS), as is well known by those having ordinary skill in the art. While a global positioning system device  308  is one example of a location determination module, it will be clear to those of ordinary skill in the art having the benefit of this disclosure that other location determination devices, such as electronic compasses or gyroscopes, could be used as well. 
     A user interface  309  can be included. As noted above, in one embodiment, the display  103  is configured as a touch sensitive display, and accordingly functions as a user interface in and of itself. However, some applications will be better served with additional user interface components as well. The user interface  309 , where included, can be operable with the control circuit  301  to deliver information to, and receive information from, a user. The user interface  309  can include a keypad  335 , navigation devices, joysticks, rocker switches, slider pads, buttons, or other controls, and optionally a voice or touch command interface. These various components can be integrated together. 
     In one or more embodiments, the lens of the display  103  can be configured as a lens transducer  311  to deliver audio output to a user. While this will be described in more detail with reference to  FIG. 15  below, piezoelectric transducers can be operably disposed with a lens of the display  103 . Actuation of the piezoelectric transducers can cause the lens of the display  103  to vibrate, thereby emitting acoustic output. An example of a piezo-driven lens speaker is described in commonly assigned, pending U.S. Ser. No. 12/967,208, filed Dec. 14, 2010, entitled “A PORTABLE ELECTRONIC DEVICE,” which is incorporated herein by reference. 
     An accelerometer  313  can be included to detect motion of the detachable electronic module  101 . The accelerometer  313  can also be used to determine the spatial orientation of the detachable electronic module  101  in three-dimensional space by detecting a gravitational direction. In addition to, or instead of, the accelerometer  313 , an electronic compass can be included to detect the spatial orientation of the detachable electronic module  101  relative to the earth&#39;s magnetic field. Similarly, one or more gyroscopes can be included to detect rotational motion of the detachable electronic module  101 . The gyroscope can be used to determine the spatial rotation of the detachable electronic module  101  in three-dimensional space. 
     Where the detachable electronic module  101  is configured as a wellness device, or is capable of operating in a health monitoring mode, one or more wellness sensors  334  can be included as well. Examples of wellness sensors are described in commonly assigned U.S. patent application Ser. No. 10/396,621, filed Mar. 24, 2003, published as US Published Patent Application No. 2004/0015058, which is incorporated herein by reference. 
     For example, a heart monitor  316  can be configured to employ EKG or other sensors to monitor a user&#39;s heart rate. The heart monitor  316  can include electrodes configured to determine action potentials from the skin of a user. A temperature monitor  317  can be configured to monitor the temperature of a user. A pulse monitor  318  can be configured to monitor the user&#39;s pulse. The pulse monitor  318  lends itself to the wristwatch configuration of the electronic device ( 100 ) of  FIG. 1  because the wrist serves as an advantageous location from which to measure a person&#39;s pulse. These devices can be used to determine when the detachable electronic module  101  is coupled to a user&#39;s wrist. 
     A moisture detector  319  can be configured to detect the amount of moisture present on a person&#39;s skin. The moisture detector  319  can be realized in the form of an impedance sensor that measures impedance between electrodes. As moisture can be due to external conditions, e.g., rain, or user conditions, perspiration, the moisture detector  319  can function in tandem with ISFETS configured to measure pH or amounts of NaOH in the moisture or a galvanic sensor  320  to determine not only the amount of moisture, but whether the moisture is due to external factors, perspiration, or combinations thereof. This device can be used to determine whether the detachable electronic module  101  or active strap  102  is being worn by the user. 
     The medical history of a user, as well as the determinations made by the various wellness sensors  334 , can be stored in a medical profile  321 . Periodic updates can be made to the medical profile  321  as well. The medical profile  321  can be a module operable with the control circuit  301 . Such modules can be configured as sets of instructions stored in the memory  302  that are usable by the control circuit  301  to execute the various wellness monitoring functions of the detachable electronic module  101 . Alternatively, the modules could be configured in hardware, such as through programmable logic. The wellness sensors  334  shown in  FIG. 3  are illustrative only. Embodiments of the present invention may use various combinations of wellness sensors  334 , including subsets of the wellness sensors  334  shown in  FIG. 3 . Further, other modules may be added to further increase device functionality. The wellness sensors  334  can be used to provide the user with a sensor-based health and wellness data assessment. The wellness sensors  334  can be used in conjunction with the medical profile  321  to provide context sensitive recommendations on the display  103 . 
     Turning now to  FIG. 4 , illustrated therein is a cut-away view of the detachable electronic module  101  illustrating how some of the components of  FIG. 3  may be disposed within the housing of the detachable electronic module  101 . The battery ( 304 ) in the embodiment of  FIG. 4  comprises a first cell  407  disposed in a first detachable electronic module extension  107  and a second cell  408  disposed in a second detachable electronic module extension  108 . All other electrical components, such as the control circuit  301 , are disposed within a central housing of the detachable electronic module  101 , with the exception of any conductors or connectors required to deliver energy from the first cell  407  and second cell  408  to the electronic components disposed within the central housing. In this illustrative embodiment, the first cell  407  and second cell  408  each comprise 400 mAh lithium cells. Where the detachable electronic module  101  is configured for communication with both wide area networks, e.g., cellular networks, and local area networks, e.g., WiFi networks, both the first cell  407  and the second cell  408  can be included. However, in some embodiments where only local area network communication or no communication capability is included, one of the first cell  407  or second cell  408  may be omitted. 
     The mobile communication circuit  303  is disposed at a first end of the detachable electronic module  101 . The near field communication circuit  307  can be disposed on a side of the detachable electronic module  101  opposite the mobile communication circuit  303 . The global positioning system device ( 308 ), where included, can also be disposed on a side opposite the mobile communication circuit  303 . In this illustrative embodiment, the global positioning system device ( 308 ) is displaced from the near field communication circuit  307  to avoid interference. The light sensor  306  and/or infrared sensor  314  can be disposed on a side of the device. 
     The microphones ( 305 ) in this illustrative embodiment comprise a first microphone  405  disposed on a first side of the detachable electronic module  101  and a second microphone  406  disposed on a second side of the detachable electronic module  101  that is opposite the first side. As noted above, multiple microphones can be included to receive voice input, voice commands, and other audio input. The microphones ( 305 ) can also be used to detect muffled sounds when clothing is covering the device. Said differently, the microphones can be used to detect a noise profile corresponding to a clothing object covering the wearable electronic device ( 100 ). 
     In this explanatory embodiment, the first microphone  405  and second microphone  406  can be used for selective beam steering. The infrared sensor  314 , light sensor  306 , or other sensor can detect a directional position of a user. The control circuit  301  can then select between the first microphone  405  and the second microphone  406  to beam steer audio reception toward the user. 
     Turning now to  FIGS. 5 and 6 , illustrated therein are additional internal components associated with one explanatory detachable electronic module  101  configured in accordance with one or more embodiments of the invention.  FIG. 5  illustrates an exploded view, while  FIG. 6  illustrates a sectional view. 
     The detachable electronic module  101  includes a housing  501  configured to carry internal components. This illustrative housing  501  is curved and contoured so as to form a wearable housing, in that it can be coupled to either a passive or active strap and worn about a wrist, arm, or leg. Alternatively, it could be coupled about a waist as well. In one embodiment, the housing  501  and a cover layer  502  of the display assembly bound the internal components. An optional mechanical upper housing  503  can also be used to retain the cover layer  502  within the housing  501 . (The optional mechanical upper housing  503  is not shown in  FIG. 6 .) 
     The cover layer  502  can be a substrate manufactured from thin plastic film, sheet plastic, or reinforced glass. The cover layer  502  serves as a fascia member for the detachable electronic module  101 . A “fascia” is a covering or housing, which may or may not be detachable, for an electronic device like the detachable electronic module  101  of  FIGS. 5 and 6 . To provide ornamentation, text, graphics, and other visual indicators, the cover layer  502 , in one embodiment, includes printing disposed on the rear face. Selective printing on the cover layer  502  may be desirable, for instance, around the perimeter of the cover layer  502  to cover electrical traces connecting internal components. Printing may be desired on the front face of the cover layer  502  for various reasons as well. For example, a subtle textural printing or overlay printing may be desirable to provide a translucent matte finish atop the detachable electronic module  101 . Such a finish is useful to prevent cosmetic blemishing from sharp objects or fingerprints. By printing only on the rear face, the front face can remain smooth and glossy. The cover layer  502  may also include an ultra-violet barrier as well. Such a barrier is useful both in improving the visibility of the display module  504  and in protecting internal components of the detachable electronic module  101 . As noted above, the cover layer  502  can include a plurality of indium tin oxide or other electrodes, which function as a capacitive sensor, to covert the display to a touch-sensitive display. 
     Beneath the cover layer  502  is the display module  504 , which in this case is an OLED display module. The display module  504  is configured to provide visual output having a presentation orientation through the cover layer  502  to the user. 
     As noted above, in one or more embodiments, the display ( 103 ) or cover layer  502  can be can be used as a user input and as a transducer for acoustic output. In some embodiments, the cover layer  502 , display module  504 , or combinations thereof will be moveable relative to the housing  501 . In some embodiments, an acoustic roll of compliant material  505  can be disposed between the cover layer  502  and the housing  501 . The inclusion of the acoustic roll facilitates small movement of the cover layer  502 , display module  504 , or combinations thereof relative to the housing  501 . A design gap  605  can be included between the cover layer  502  and the housing  501  for insertion of the acoustic roll of compliant material  505  and to facilitate travel of the cover layer  502  relative to the housing  501 . In embodiments that have an exposed display ( 103 ) or display module with no cover layer  502 , the display ( 103 ) or display module can be attached to the acoustic roll of compliant material  505  in place of the cover layer  502 . In these embodiments, the movable display module would serve the as the user input and transducer for acoustic output. 
     A circuit carrier  506  can then include the control circuit ( 301 ) and other electronic circuitry components and modules. In one embodiment, the circuit carrier  506  comprises a printed circuit board manufactured from FR-4 fiberglass. In another embodiment, the circuit carrier  506  comprises a flexible substrate disposed about flexible conductors, which is known in the art as a “flex” circuit. The circuit carrier  506  can include components disposed on the top and bottom sides. Alternatively, the circuit carrier  506  can have components disposed on a single side to conserve cost. The circuit carrier  506  can comprise one or more substrates that are coupled together with electrical conductors, wires, or other flex circuits. 
     Where the cover layer  502  is used in conjunction with piezoelectric devices  507 , a piezo frame  508  can be used as a mechanical support extending from the piezoelectric devices  507  and the cover layer  502 . When the piezoelectric devices  507  are actuated, the piezo frame  508  transfers force to the cover layer  502  to make it move in response to the forces generated by the piezoelectric devices  507 . Alternatively, when a user engages the cover layer  502  to use it as a control input, user exerted force is transferred through the piezo frame  508  to the piezoelectric devices  507 , which function as an input sensor in this mode. 
     The piezoelectric devices  507  can be configured as disks or pills as shown in  FIG. 5 . Alternatively, the piezoelectric devices  507  can be configured as bendable elements bonded to the piezo frame  508 . In the case where piezoelectric disks are couple to the piezo frame  508 , one portion of the piezoelectric disks can be coupled to the piezo frame  508  while another portion of the piezoelectric disks is coupled to the housing  501  or another portion of detachable electronic module  101  that is more massive than the cover layer  502 . Alternatively the piezoelectric disks can be disposed between the cover layer  502  and the piezo frame  508 , reversing the order of the components, but still providing the same effective functionality. This latter embodiment serves as an effective mechanical grounding for the piezoelectric system. In an embodiment where the piezoelectric devices  507  are bendable elements bonded to the piezo frame  508 , the bendable elements can be bonded only to the piezo frame  508 , with the frame being coupled to both the cover layer  502  and the housing  501 . 
     Turning to  FIG. 7  illustrated therein are components that can be included in the active strap  102 . Note that in many embodiments, the detachable electronic module ( 101 ) can be coupled to passive straps or attachments to form a wearable electronic device. In one or more embodiments, functionality can be increased by providing an active strap  102  that also includes a power source and hardware components. The components shown in  FIG. 7  provide an illustration of components that can be included with the active strap  102 . However, as with the modules shown in  FIG. 3 , the active strap  102  can include subsets of the modules, with only those modules being included as required by a particular application. 
     The active strap  102  can include its own control circuit  701 . The control circuit  701  can be operable with a memory  702 . The control circuit  701 , which may be any of one or more microprocessors, programmable logic, application specific integrated circuit device, or other similar device, is capable of executing program instructions associated with the functions of the active strap  102 . The program instructions and methods may be stored either on-board in the control circuit  701 , or in the memory  702 , or in other computer readable media coupled to the control circuit  701 . 
     The active strap  102  can include a display  703 . In one embodiment, the display  703  comprises one or more flexible display devices. Since the active strap  102  can be configured as a wristband for a wristwatch-type wearable device, flexible displays disposed on the active strap  102  can “wrap” around the wearer&#39;s wrist without compromising operational performance. While the display  703  can include non-flexible displays as well, the inclusion of flexible display devices not only increases comfort for the wearer but also allows the display  703  to be larger as well. The display  703  can be configured to be touch sensitive also, thereby allowing the display  703  to be used as a control input. The display is configured to provide visual output, images, or other visible indicia to a user. The display  703  can also be configured with a force sensor. Where configured with both, the control circuit  701  can determine not only where the user contacts the display  703 , but also how much force the user employs in contacting the display  703 . Where configured with a force sensor only, the display  703  can be used as a large “push button” or input control. 
     A battery  704  or other energy source can be included to provide power for the various components of the active strap  102 . In one or more embodiments, the battery  704  is selectively detachable from the active strap  102 . Charging circuitry  705  can be included in the active strap  102  as well. The charging circuitry  705  can include overvoltage and overcurrent protection. In one embodiment, the battery  704  is configured as a flexible lithium polymer cell. 
     One or more microphones  706  can be included to receive voice input, voice commands, and other audio input. A single microphone can be included. Optionally, two or more microphones can be included for selective beam steering. As with the detachable electronic module ( 101 ) described above, a first microphone can be located on a first side of the active strap  102  for receiving audio input from a first direction, while a second microphone can be placed on a second side of the active strap  102  for receiving audio input from a second direction. In response to a sensor, perhaps located in the detachable electronic module ( 101 ), a user location direction can be determined. The control circuit  701  can then select between the first microphone and the second microphone to beam steer audio reception toward the user. Alternatively, the control circuit  701  can employ a weighted combination of the microphones to beam steer audio reception toward the user. 
     A near field communication circuit  707  can be included for communication with local area networks. A global positioning system device  708  can be included for determining location information. One or more audio output devices  709  can be included to deliver audio output to a user. Piezoelectric devices  710  can be configured to both receive input from the user and deliver haptic feedback to the user. 
     Where desired, one or more wellness sensors  711  can be included as well. As described above, the wellness sensors  711  can include a heart monitor, moisture detector, temperature monitor, pulse monitor, galvanic devices, and so forth. 
     Tension and/or pressure sensors  712  can be used to determine when the active strap  102  is being worn or is otherwise coupled to a wearer or is otherwise secured. The tension and/or pressure sensors  712 , which are operable with the control circuit  701  of the active strap  102 , the control circuit  701  of the detachable electronic module ( 101 ), or combinations thereof, can be configured to determine whether the active strap  102  of a wearable electronic device has a tension force applied in excess of a predetermined threshold indicative of the strap being worn. One example of the predetermined threshold is 0.5 lbs of force. Alternatively, the pressure sensors can be placed within a clasp or buckle of the active strap to determine when the clasp or buckle is closed. 
     Turning now to  FIG. 8 , illustrated therein is a cut-away view of the active strap  102  that demonstrates illustrative locations of some of the components shown in  FIG. 7 . In this illustrative embodiment, the display ( 703 ) comprises a first display  803  disposed on a first side of the active strap  102  and a second display  804  disposed on a second side of the active strap  102 . The first display  803  and the second display  804  are flexible displays, and cover substantial portions of the outer surface of the upper face of the active strap  102 . Disposition of the displays in this arrangement lends itself to interesting applications. For example, when used with a light sensor ( 306 ) of a detachable electronic module ( 101 ) coupled to the active strap, the displays can present a color that is complementary to the colors worn by the user, thereby transforming the active strap  102  into a fashion accessory. Alternatively, the displays can present data, images, video, or other indicia to the user. 
     The battery  704  in this illustrative embodiment has been disposed beneath an attachment bay  801 . The attachment bay  801  is configured for attachment to other electronic devices, one example being the detachable electronic module ( 101 ) of  FIG. 4 . Where included, the near field communication circuit  707  can be disposed within the attachment bay  801  as well. Alternatively, the near field communication circuit  707  can be disposed in the outer portions of the active strap  102 . 
     Turning now to  FIG. 9 , illustrated therein is another embodiment of an electronic device  900  configured in accordance with embodiments of the present invention. The electronic device  900  is configured as a wearable device. A detachable electronic module  901  is coupled to an active strap  902  to form a wrist wearable device. The illustrative electronic device  900  of  FIG. 9  includes a mobile communication circuit ( 303 ), a touch sensitive display  903 , wellness sensors ( 334 ), a near field communication circuit ( 307 ), a global positioning system device ( 308 ), an infrared sensor ( 314 ), twin microphones configured for selective beam steering, and a cover layer configured with piezoelectric sensors ( 315 ) so as to function as an acoustic transducer and input control device. Accordingly, the electronic device  900  can function in a telephone mode to not only serve as a personal communication device akin to a mobile telephone, but can also function in a health monitoring mode to also serve as a personal safety and security device capable of detecting falls, user accidents, user drowsiness, user sleep and sleep patterns. Moreover, the electronic device  900  is capable of sending and receiving emergency alert communication messages, as well as delivering alert notifications to the user. In one or more embodiments, the electronic device  900  can be configured to communicate with social networks to provide automatic wellness and other updates to friends or family. The wearable electronic device  900  functions as a wearable wireless communication device that is compact and includes wellness sensing capabilities. The electronic device  900  has an efficient, compact design with a simple user interface configured for efficient operation with one hand (which is advantageous when the electronic device  900  is worn on the wrist). 
     In addition to the touch sensitive input of the touch sensitive display  903 , the electronic device  900  is further equipped with an accelerometer ( 313 ) that can detect movement. Accordingly, when the electronic device  900  is worn on a wrist, the user can make gesture commands by moving the arm in predefined motions. Additionally, the user can deliver voice commands to the electronic device  900  via the twin microphones. 
     The user interface of the electronic device  900  is specially designed for a small screen. It included an intuitive touch interface. When the piezoelectric sensors ( 315 ) in conjunction with the cover layer of the touch sensitive display  903  are utilized as a touch interface, special functions can be realized. For example, the cover layer can be pressed for a short time, e.g., less than two seconds, to power on and off the electronic device  900 . Alternatively, the cover layer can be pressed for a long time, e.g., more than two seconds, to perform a special function, such as transmission of an emergency message. 
     When the touch sensitive display  903  is configured as a touch sensitive display, control input can be entered in some embodiments with a single swiping action across the surface of the touch sensitive display  903 . When operating in conjunction with the piezoelectric sensors ( 315 ), the touch sensitive display  903  can deliver intelligent alerts, acoustics, and haptic feed back in addition to visual output. In one or more embodiments, the touch sensitive display  903  is configured to alter magnification of the visual output for special applications. For instance, the touch sensitive display  903  can alter the magnification of a keypad during mobile communication dialing operations. 
     Using the near field communication circuit ( 307 ), the electronic device  900  can communicate with other electronic devices to provide “device to device” connectivity. For example, the electronic device  900  can link to a tablet-style computer to permit viewing of the visual output of the touch sensitive display  903  on a larger screen. Alternatively, the electronic device  900  can connect to external devices such as monitors, speakers, or other devices and wirelessly deliver audio, video, or combinations thereof to another electronic device disposed within a near-field communication radius of the electronic device  900 . The electronic device  900  can further serve as a communication portal for the peripheral device, providing telephony functionality, messaging functionality, and notification functionality for the tablet-style computer. 
     As the electronic device  900  is configured with a small form factor in a wearable configuration, it provides advantages over prior art devices. For example, with prior art devices, a user employing a tablet-style computer frequently had to carry a mobile telephone to provide communication capability for the tablet-style computer. The wearable nature of the electronic device  900  alleviates the need to carry a large communication device for device-to-device connectivity with portable computers or tablet style computers. Moreover, the wearable nature of the electronic device  900  is compact and simple for a user to carry. 
     The inclusion of wellness sensors ( 334 ) provides advantageous applications in the area of wellness and health. For example, the medical profile ( 321 ) permits a user to store a medical history or wellness profile in the electronic device  900 . Applications operable on the electronic device  900  can then draw on this information to provide wellness applications that are specifically tailored to the wearer. Additionally, sensors like the heart monitor ( 316 ), pulse monitor ( 318 ), and temperature monitor ( 317 ) can continually monitor vital signals of the user while the electronic device  900  is worn. By maintaining a record of this monitoring in the medical profile ( 321 ), the electronic device can provide a wellness assessment by analyzing the data. Sleep can be detected based upon pulse and temperature. Additionally, high-risk situations can be detected from elevated pulse, heartbeat, and excessive perspiration. 
     Applications operable on the electronic device  900  can provide timely wellness and health reminders, such as when a user should ingest medicine or when the user should exercise. Further, wellness outcomes, such as the results of an exercise session, can be presented on the touch sensitive display  903 . The wellness sensors ( 334 ) can be configured to monitor vital signals only upon predetermined criteria. For example, when the moisture detector ( 319 ) detects moisture, the wellness sensors ( 334 ) may presume the user is exercising and actuate vital sign monitoring. The wellness sensors ( 334 ) can be configured to make wellness recommendations based upon location, history, and/or activity. The wellness sensors ( 334 ) can be configured to provide early warnings that anticipate health events based upon data detected using onboard sensors. The wellness sensors ( 334 ) can be configured to automatically journal daily physical and wellness activity. The wellness sensors ( 334 ) can be configured to provide real time updates to trusted family members, friends, or medical service providers. 
     The wellness sensors ( 334 ) can be configured to automatically deliver messages to third parties, e.g., doctors, family members, or friends, when abnormal wellness conditions are detected. As noted above, in one or more embodiments, a user can send such a message by pressing the cover layer of the touch sensitive display  903  for a predetermined time. The wellness sensors ( 334 ) can be configured to detect falls, auto accidents, extended lack of motion of a wearer, or sleep. This will be described in more detail with reference to  FIG. 24  below. In one embodiment, the wellness sensors ( 334 ) can be configured to provide awakening alerts to the user when drowsiness or sleep is detected. 
     Turning now to  FIG. 10 , the detachable nature of the detachable electronic module  901  from the active strap  902  is shown. In this illustrative embodiment, the detachable electronic module extensions  1007 , 1008  are non-planar, in that they are curved in cross section. This geometric configuration provides a wearable configuration for the detachable electronic module  901  in that the non-planar geometries of the detachable electronic module extensions  1007 , 1008  are complementary to the shape of a wearer&#39;s arm. Where this is the case, energy storage devices disposed within the detachable electronic module extensions  1007 , 1008  can be non-planar as well. 
     In  FIG. 10 , the detachable electronic module  901  has been released from the attachment bay  1001 , thus converting it to a stand-alone device that can be used individually by the user or docked for use with other devices. In addition to providing wearable capabilities for the overall electronic device  900 , the active strap  902  can be used for a stand. Since it is an active device with hardware and a power source, the active strap  902  can remain on the wrist to monitor wellness or other conditions while the detachable electronic module  901  is not connected. Upon reconnection, the detachable electronic module  901  can retrieve such monitored data and process it or communicate it as directed by a particular application. 
     Turning now to  FIG. 11 , the detachable electronic module  901  has been rotated to reveal electrical couplings  1101 , 1102 , 1103 , 1104  that allow the detachable electronic module  901  and the active strap  902  to work in tandem. In this illustrative embodiment, the attachment bay  1001  includes electrical couplings  1101 , 1102  that mate with complementary electrical couplings  1103 , 1104  disposed on the detachable electronic module extensions  1007 , 1008 . The location of these electrical couplings  1101 , 1102 , 1103 , 1104  is illustrative only. Other electrical coupling embodiments will be described below. The tension and/or pressure sensors ( 712 ) of the active strap  902  can deliver information to the detachable electronic module  901  through these electrical couplings  1101 , 1102 , 1103 , 1104 . 
     Turning to  FIG. 12 , the detachable electronic module  901  is shown by itself with one example of visual output  1201  being presented on the touch sensitive display  903 . The visual output  1201  in this embodiment is a telephone dialer, as the detachable electronic module  901  is operating in a telephone mode. As noted above, in one or more embodiments, the control circuit ( 301 ) of the detachable electronic module  901  can be configured to alter one of a color, a resolution, a scaling, an operating mode, or a magnification of the visual output  1201 . For example, one or more of these characteristics can be altered when the control circuit ( 301 ) determines that clothing is covering the detachable electronic module  901 , its corresponding strap, or combinations thereof. 
     Turning to  FIG. 13 , illustrated therein is an optional mechanical feature associated with one detachable electronic module  1301  configured in accordance with one or more embodiments of the invention. As shown in  FIG. 13 , the detachable electronic module extensions  1307 , 1308  are coupled to the detachable electronic module  1301  with folding hinges and have been folded  1302 , 1303  about the rear side of the detachable electronic module  1301 . This position is referred to a “closed” position because the detachable electronic module extensions  1307 , 1308  are disposed against a major face, i.e., the back surface, of the housing of the detachable electronic module  1301 . This collapsible feature allows the detachable electronic module  1301  to become a more compact device when being used in the absence of a passive or active strap. Additionally, the collapsible feature can allow a user to alter the operational modes of the detachable electronic module  1301  by moving the detachable electronic module extensions  1307 , 1308  relative to the central housing of the detachable electronic module  1301 . 
     In this illustrative embodiment, each detachable electronic module extension  1307 , 1308  is equipped with pivoting power and ground contacts so that power from the cells disposed within the detachable electronic module extensions  1307 , 1308  deliver power to the control circuit and other components in the detachable electronic module  1301  regardless of their radial orientation relative to the detachable electronic module  1301 . In this illustrative embodiment, the detachable electronic module  1301  has a thickness  1309  of between twenty and thirty millimeters. 
     While the detachable electronic module extensions  1307 , 1308  are shown completely folded in  FIG. 13 , it should be noted that the folding hinges can be configured to be resistive so as to be pivotable to any number of rotational orientations as desired by a user. For example, each detachable electronic module extension  1307 , 1308  can be rotated halfway so as to serve as a stand when the detachable electronic module  1301  is placed on its side. In one or more embodiments, the detachable electronic module extensions  1307 , 1308  are coupled to the central housing of the detachable electronic module with a detented hinge that provides pseudo mechanical stops so that the detachable electronic module extensions  1307 , 1308  can be easily stopped at a variety of pre-defined angularly displaced orientations relative to the central housing of the detachable electronic module  1301 . In such an embodiment, the detented hinge comprises a plurality of detent stops configured to hold the one or both of the first detachable electronic module extension  1307  or the second detachable electronic module extension  1308  in one of a plurality of angularly displaced alignments relative to the housing. 
     Turning to  FIG. 14 , illustrated therein are the detachable electronic module  1301  of  FIG. 13  and an electronic device  1400  placed on a table  1410 .  FIG. 14  illustrates a few of the many options for using the electronic devices configured in accordance with embodiments of the invention when not being worn. The detachable electronic module extensions  1307 , 1308  have been folded about detachable electronic module  1301 . The detachable electronic module  1301  has then been placed face up, with each detachable electronic module extension  1307 , 1308  serving as a stand. This configuration can be useful, for example, when multiple people are using the detachable electronic module  1301  as a speakerphone during a group call. Further, the active strap to which the detachable electronic module  1301  was coupled can remain on the wrist performing wellness monitoring. With electronic device  1400 , the active strap  1402  has been straightened from its wearable configuration to serve as a stand. This configuration can be useful, for example, when using the electronic device  1400  as an alarm clock. 
     Turning now to  FIG. 15 , a detachable electronic device  1501  having piezoelectric devices  1515  configured work with the cover layer  1502  of the display to provide input and output capabilities. Piezo frame elements  1516  function as mechanical couplers between the cover layer  1502  and the piezoelectric devices  1515 . The control circuit disposed within the detachable electronic device  1501  is operable with the piezoelectric devices  1515 . The control circuit can actuate the piezoelectric devices  1515  to employ them as output devices. Alternatively, when forces act upon the piezo frame elements  1516 , those forces are transferred to the piezoelectric devices  1515 , thereby delivering signals to the control circuit. Accordingly, the piezoelectric devices  1515  can be used as either input or output devices. 
     The inclusion of the piezoelectric devices  1515  provides many advantageous functions to the detachable electronic device  1501 . As noted above, when the cover layer  1502  is touched or pressed by a user, the cover layer  1502  becomes an input control device for receiving user input. The piezoelectric devices  1515  can sense this input and deliver a corresponding signal to the control circuit. By using multiple piezoelectric devices  1515  that are spread out within the detachable electronic device  1501 , the signals can be read individually to determine an approximate location along the cover layer  1502  contacted by the user. In this manner, the cover layer  1502  can be used as a navigation device by defining, for example, a “left edge press” with a different function from a “right edge press,” and so forth. 
     The cover layer  1502  can also be used as an output. In one or more embodiments, the control circuit actuates the piezoelectric devices  1515  in accordance with an audio signal to use the cover layer  1502  as an audio transducer. Accordingly, the cover layer becomes a loudspeaker through which audio output can be delivered to a user. In some embodiments, the control circuit can actuate the piezoelectric devices  1515  in accordance with pulse functions to deliver haptic feedback to the user as well. 
     Turning now to  FIG. 16 , illustrated therein is a method  1600 , suitable for an electronic device such as the wearable electronic devices described above, for determining that clothing is covering the electronic device. The method  1600  can be configured as executable code and stored in a memory that is operable with one or more processors to execute the various steps of the method  1600 . Alternatively, one or more hardware modules can be configured to execute the steps of the method  1600  as well. 
     At step  1601 , the method  1600  detects whether the wearable electronic device is being worn. In one embodiment, this step  1601  detects whether the wearable electronic device is coupled to the wearer, e.g., strapped about a wrist, being worn about a neck, and so forth. This step  1601  can be performed with the use of at least a first sensor or sensors. One explanatory example of such a sensor is a galvanic skin sensor that is used to determine that the wearer is wearing the device. The skin sensor can detect that the wearable electronic device is proximately located with skin of the wearer. Another explanatory example of such a sensor is a tension sensor deployed in a strap of the wearable electronic device configured to detect that the wearer has the strap secured. Another explanatory example of such a sensor is a pressure sensor, which may be disposed beneath the strap of the wearable electronic device, between the strap and a detachable electronic module of the wearable electronic device, in a clasp or buckle of the wearable electronic device, or in combinations thereof. Such tension and pressure sensors, used alone or in combination, can be configured to detect whether the strap of the wearable electronic device is applying a tension force to the wearable electronic device in excess of a predetermined threshold. As noted above, one example of a predetermined threshold is a force in excess of 0.5 lbs. Other thresholds, for example, 0.25 lbs, 0.33, lbs, 0.15 lbs, 0.75 lbs, and so forth can be used. 
     At step  1602 , the method  1600  determines whether the wearable electronic device is covered. As with step  1601 , step  1602  can be performed by at least a second sensor or sensors. In one illustrative embodiment, the second sensor can be an infrared sensor configured to detect that the wearable electronic device has been covered for an extended period of time. The infrared sensor can determine the same by detecting a saturation state resulting from high levels of reflected signals received from the covering object. In another embodiment, cameras or image capture devices can detect that the wearable electronic device is covered by capturing images of proximately located objects. Of course, combinations of these sensors can be used. Further, additional sensors will be obvious to those of ordinary skill in the art having the benefit of this disclosure. 
     At optional step  1603 , in response to the determination of step  1602 , the method  1600  can perform an additional determination to increase a probability that the wearable electronic device is covered with clothing. Step  1603  helps to prevent false positives by attempting to further identify that the covering object is clothing. Illustrating by example, step  1602  may determine that the wearable electronic device is covered when the user rests his wrist upside down on a desk. The desk covers the device, but is not clothing. In an effort to increase the probability that the covering object is in fact clothing, step  1603  can be performed. In one embodiment step  1603  performs an additional determination to provide further confirmation regarding whether the wearable electronic device is covered with clothing. 
     As with steps  1601  and  1602 , step  1603  can be accomplished in conjunction with one or more sensors. In one embodiment, the sensors used in step  1603  are different from those used in step  1602 . Generally stated, the sensors used in step  1603  can be at least a third sensor or sensors that are different from the second sensors used in step  1602 . The second sensor or sensors determine that the wearable electronic device is covered, while the third sensor or sensors perform a secondary check to obtain a positive indication that the object is the clothing. 
     Examples of the third sensor or sensors include an array of microphones. The microphones can be actuated at step  1603  to detect a noise profile corresponding to a clothing object covering the wearable electronic device. The noise profile can be a muffled sound caused by the proximately located clothing. In one embodiment, the noise profile is a stored acoustic profile of a covered wearable electronic device having different clothing materials, e.g., cotton, silk, wool, leather, and so forth, that has been previously recorded in factory setting during rubbing and/or covering actions. This profile can indicate noises and/or alterations caused by the clothing, as well as spectral changes in reflected noise. The profile can be stored in a memory of the wearable electronic device for match comparison performed at decision  1604 . 
     Another example of the third sensor or sensors includes a capacitive or other electrical sensor configured to determine conductance. Such a sensor can determine whether the object covering the wearable electronic device is electrically conductive. Wool tends not to be electrically conductive, while a metal drawer would be conductive. The conductivity of the surrounding material may indicate whether the covering object is clothing. 
     In one embodiment, hysteresis can be added to ensure not only that the device is covered, but that is covered for a sufficiently long amount of time. While the operational mode of the wearable electronic device can be changed by user control settings, such as when covered by an object other than clothing, in many cases a user may not want the operational modes or output settings changed when the wearable electronic device is only briefly covered. Turning briefly to  FIG. 17 , illustrated therein is one explanatory series of steps illustrating how this can occur. 
     From step  1602  of  FIG. 16 , it is determined at decision  1701  that an object is covering the wearable electronic device. At step  1702  a timer is set for a predetermined amount of time. The amount of time can vary based upon application. Examples of predetermined times include 5 seconds, 10 seconds, 30 seconds, 2 minutes, 5 minutes, and so forth. In one or more embodiments, the predetermined time can be set by the user. Moreover, the user may additionally define what action is to be taken, i.e., how the operational mode will change, for any predefined times defined by the user. 
     Whether the timer expires while the wearable electronic device is covered is determined at decision  1703 . Where the wearable electronic device was covered for the duration of the timer, step  1603  concludes that it is clothing covering the wearable electronic device at step  1704 . Where the device was uncovered while the timer was running, step  1603  can conclude that the object covering the wearable electronic device was not clothing at step  1705 . The wearable electronic device may have been covered in passing by a hand or other object. The steps shown in  FIG. 17  work well in practice because clothing tends to be worn for extended time periods. A user is not likely to repeatedly don and remove clothing. By contrast, any number of passing objects can momentarily cover the device, including paper, hands, desks, and so forth. The steps of  FIG. 17  ensure consistent operation of the wearable electronic device when not covered by clothing. 
     There are other ways of performing the secondary check of step  1603  as well. Turning briefly to  FIG. 18 , illustrated therein is one explanatory example. 
     As shown in  FIG. 18 , rather than confirming that clothing is covering the device by coverage time as was shown in  FIG. 17 , contextual data is consulted. In this illustrative embodiment, step  1603  comprises accessing contemporary contextual data of the wearable electronic device, accessing expected contextual data based upon one or more of time, temperature, date, environment, ambient lighting near device, about the wearable electronic device, weather within a predetermined vicinity of the wearable electronic device, motion of the wearable electronic device, illumination of the wearable electronic device, location of the wearable electronic device, operational mode of the device, e.g., when the device is in a communication mode, or combinations thereof, and comparing the contemporary contextual data with the expected contextual data. 
     Explaining by way of example, at step  1801  contextual data is accessed. Recall from above that the wearable electronic device has a control circuit that is operable with a variety of sensors. The wearable electronic device may consult a temperature sensor to detect ambient temperature as contextual data. Alternatively, the wearable electronic device may consult a moisture sensor to determine whether the wearable electronic device is wet. Alternatively, the wearable electronic device may consult a light sensor to determine whether ambient light is illuminating the wearable electronic device. Alternatively, the wearable electronic device may consult a location sensor to determine the location of the wearable electronic device or whether the wearable electronic device is inside a building or structure or outside. Of course, combinations of these contextual data can be accessed at step  1801  as well. Further, other contextual data will be obvious to those of ordinary skill in the art having the benefit of this disclosure. 
     Once the current contextual data is accessed at step  1801 , expected contextual data can be accessed at step  1802 . Illustrating by example, the wearable electronic device may use a communication circuit to consult a weather service to obtain weather information as expected contextual data to determine the expected ambient temperature or season. Alternatively, the wearable electronic device my consult a clock to determine the time of day as expected contextual data. Other examples of expected contextual data will be obvious to those of ordinary skill in the art having the benefit of this disclosure. 
     After obtaining both the contextual data and the expected contextual data, a comparison can be made at decision  1803  to further determine whether the covering object is in fact clothing. If, for example, step  1802  reveals that it is 1:15 PM, which means that sun should be shining, and step  1801  reveals that no ambient light is illuminating the wearable electronic device, step  1804  can conclude that a covering object is indeed clothing. Similarly, if step  1802  reveals that rain is expected, and step  1801  reveals that the wearable electronic device is dry and not wet, step  1804  can conclude that the covering object is clothing. (Note that multiple confirmation steps can be performed as well. For example, in addition to comparing contextual data, a tertiary check can be performed by, in one embodiment, employing a sensor to also determine whether the covering object is conductive.) 
     By contrast, where the contextual data matches the expected contextual data, step  1805  can conclude that no clothing is covering the object. If step  1802  reveals that the ambient temperature is expected to be 55 degrees, and step  1801  reveals that a detected temperature is 58 degrees, step  1805  can conclude that no clothing is covering the object because the wearable electronic device is not being thermally warmed by the wearer&#39;s body heat being captured by the clothing. 
     Turning back to  FIG. 16 , where decision  1604  indicates that the covering material is likely to be clothing, i.e., where the additional determination of step  1603  is positive, the method  1600  in one embodiment adjusts one or more device settings of the wearable electronic device at step  1605 . Where decision  1604  indicates that the covering object is likely not clothing, two actions can occur. First, in one embodiment, normal operation can continue at step  1608 . Optionally, the method  1600  can adjust another function or operational mode at step  1609  when clothing is not detected. For example, when a wearable electronic device is temporarily covered by a hand, in one embodiment the method  1600  can convert visible notifications to audio, and so forth. 
     The adjustment of step  1605  can take a variety of forms. Turning now to  FIG. 19 , illustrated therein are a few explanatory examples. In a first embodiment, step  1605  can include causing the wearable electronic device to enter a power saving operational mode  1901 . In another embodiment, step  1605  can include adjusting an output gain  1902  of one or more audio output devices. For example, the volume of loudspeakers can be increased when the wearable electronic device is covered by clothing. 
     In another embodiment, step  1605  can include adjusting comprises changing an output notification  1903  of one or more loudspeakers of the wearable electronic device. For example, a unique ring tone can be selected for the covered mode of operation. The ring tone selected may be more audible through clothing. In another embodiment, step  1605  can include actuating a vibration mode  1904  of the wearable electronic device. In yet another embodiment, step  1605  can include adjusting one or more of a pitch, tone, spectral content, pattern, timbre, or combinations thereof  1905  of alert tones emitted by the wearable electronic device. For example, a ring tone could be spectrally altered to better penetrate through clothing. 
     In another embodiment, step  1605  can include providing an alert  1906  to the user. The alert, which may be in the form of a vibration, alert beep, or other indicator, can be configured to notify the user that clothing is obscuring the wearable electronic device. In another embodiment, step  1605  can include transmitting one or more notification messages  1907 . For example, when incoming messages or calls are received, an automatic notification may be returned indicating that the user may not be aware that the incoming communication was received. 
     In yet another embodiment, step  1605  can include changing a voice mail message  1908  or sending automated replies to incoming communications  1909 . A pre-recorded voice mail message may be changed from “I&#39;m available but away from the phone,” to “I&#39;m in transit and cannot answer the phone.” Such a change in a voice mail message may be dependent, in one embodiment, upon a contextual data comparison with expected contextual data. For example, if sensors in the wearable electronic device indicate that the user is outside of any building or dwelling, that the season is winter, and that the temperature of the device is substantially warmer than the expected ambient temperature, the wearable electronic device may conclude that the user is wearing a coat and in transit. 
     In another embodiment, step  1605  can include detecting nearby electronic devices  1910  and, where available, wirelessly delivering audio, video, or combinations thereof to another electronic device disposed within a near-field communication radius of the wearable electronic device. Accordingly, the user could see information normally presented on the display of the wearable device on another local device, e.g., a personal computer, without the need of removing a jacket or other garment. 
     In another embodiment, the nearby electronic devices  1910  may comprise audio or video or communication systems in a vehicle. For example, a user may be in a vehicle having audio output devices, video output devices, or built-in communication devices such as On-Star™ safety systems or mobile phones. In one embodiment, when covered, step  1605  can include detecting one or more of the vehicular systems and, where available, wirelessly delivering audio, video, or combinations thereof to another electronic device disposed within the vehicle. 
     In an alternate embodiment, the device may transfer communication control. For example, if the user is in a vehicle and the wearable electronic device is covered, step  1605  can include detecting nearby electronic devices  1910  and transferring functions to a complementary device. In this example, the wearable electronic device may forward phone functionality to the built-in phone system of the vehicle while the wearer is in the vehicle. When the device is uncovered, or when the user exits the vehicle, the wearable electronic device can reclaim any functionality that was delegated due to clothing coverage. 
     In yet another embodiment, step  1605  can include the actuation of new operating modes. For example, when the wearable electronic device is being worn and is covered, a near-field communication mode may be launched to locate audio or video output devices proximately located with the wearer. In yet another embodiment, sensors or electronic components can be deactuated  1913  in the wearable mode. For example, the display of the wearable electronic device may be turned OFF until the device is uncovered. 
     The examples above are illustrative only. Step  1605  can include other steps  1914  as well. For instance, where the wearable electronic device includes multiple microphones, step  1605  can include would select a microphone from the array that is least obscured or that provides the best performance. Alternatively, step  1605  can include enabling or disabling a touch-sensitive display, turning OFF backlighting features of a user interface or display, turning OFF unnecessary features or functions, disabling wireless links, and so forth. Other steps will be obvious to those of ordinary skill in the art having the benefit of this disclosure. In one or more embodiments, step  1605  occurs only where the wearable electronic device is fully covered, as a partially covered device may work fine without changing the operating mode. 
     Returning to  FIG. 16 , once the device mode or feature has been changed at step  1605 , this mode of operation is continued, in one embodiment, at step  1606  for as long as the wearable electronic device is covered. When the device is uncovered, as detected at decision  1607 , the device can return to a normal, uncovered operating mode at step  1608 . 
     Turning now to  FIG. 20 , illustrated therein is a schematic block diagram of a wearable electronic device  2000  configured to detect clothing coverage in accordance with one or more embodiments of the invention. Several of the components of  FIG. 20  have been largely described in the preceding specification and thus will be only briefly discussed here. 
     A control circuit  2001  is disposed within the wearable electronic device  2000 , and is operable with an associated memory  2002 . A plurality of sensors  2011  is operable with the control circuit  2001 . Examples of sensors  2011  include time sensors, temperature sensors, date sensors, environmental sensors, weather sensors, ultrasonic sensors, motion sensors, light sensors, location sensors, and so forth. These sensors are collectively shown as other sensors  2009  in  FIG. 20 . 
     In one embodiment, a skin sensor  2005  is configured to determine when the wearable electronic device  2000  is proximately located with the skin of a wearer. A tension sensor  2007  is configured to determine whether a strap  2010  of the wearable electronic device  2000  has a tension force applied in excess of a predetermined threshold, such as 0.25 lbs. An infrared sensor  2006  is configured to determine when the wearable electronic device is covered. One or more microphones  2008  are configured to detect an audio signature corresponding to a clothing object covering the wearable electronic device. Other sensors, subsets of these sensors, and so forth can be used in accordance with the methods described herein. 
     A clothing detection module  2003 , which can be configured as executable code stored in the memory  2002  having instructions for the control circuit  2001 , is operable with the control circuit  2001  and the sensors. In one embodiment the control circuit  2001  is configured to detect whether clothing is covering the wearable electronic device  2000 , and also whether a wearer is wearing the wearable electronic device  2000 . The clothing detection module  2003  can be configured to detect whether the wearable electronic device is coupled to a wearer, determine whether the wearable electronic device is covered, and confirm that the wearable electronic device is covered with clothing. 
     An adjustment module  2004  is configured to adjust one or more device settings of the wearable electronic device. This can include not engaging the display until the wearable electronic device is uncovered. Alternatively, this can include increasing the speaker gain to ensure the user could hear alerts, calls, and so forth. Still further, the adjustment can include selecting appropriate ring tones and alerts that are more audible through clothing. The adjustment can include selecting ring tones and alerts that are spectrally altered to better penetrate through clothing. The adjustment can include notifying the user that clothing is obscuring the wearable electronic device, with the notification being provided by a vibration signal, an alert beep, and so forth. The control circuit  2001  can employ the adjustment module  2004  to adjust one or more of these device output settings, in one embodiment, in response to the clothing detection module  2003  detecting whether the clothing is covering the wearable electronic device when the wearable electronic device is being worn by the wearer. 
     Turning to  FIGS. 20 and 21 , a simple use case is illustrated. At step  2101 , a user  2102  has donned a wearable electronic device  2103 . The wearable electronic device  2103  is uncovered and unobstructed. Accordingly, the wearable electronic device  2103  is operating in a normal operational mode. 
     At step  2105 , the user  2102  has donned clothing  2106 , which is completely covering the wearable electronic device  2103 . A first sensor  2107 , operable with a clothing detection module, is configured to determine whether the wearable electronic device  2103  is covered by an object. At step  2201 , to increase the probability of accurately concluding that the object is indeed the clothing  2106 , a second sensor  2202  performs a secondary check to obtain a positive indication that the object is the clothing  2106 . In this illustrative embodiment, the first sensor  2107  and the second sensor  2202  are different. For example, the first sensor  2107  may be an infrared sensor, while the second sensor  2202  is a capacitive sensor configured to detect electrical conductivity. 
     At step  2203 , the control circuit of the wearable electronic device  2103  is configured to adjust one or more device output settings of the wearable electronic device  2103  in response to the clothing detection module detecting whether the clothing  2106  is completely covering the wearable electronic device  2103  when the wearable electronic device  2103  is being worn by the user  2102 . 
     As described, embodiments of the present invention device detect clothing covering a device and then automatically adjust one or more device settings appropriate for the current environment. One or more sensors and control circuits can determine whether a user is wearing a device and whether something is covering the device. Secondary checks can further confirm that the object is clothing. Where it is concluded that the device is covered with clothing, such as a coat sleeve, a control circuit can take the appropriate action to alter an operational state of the device. 
     In the foregoing specification, specific embodiments of the present invention have been described. However, one of ordinary skill in the art appreciates that various modifications and changes can be made without departing from the scope of the present invention as set forth in the claims below. Thus, while preferred embodiments of the invention have been illustrated and described, it is clear that the invention is not so limited. Numerous modifications, changes, variations, substitutions, and equivalents will occur to those skilled in the art without departing from the spirit and scope of the present invention as defined by the following claims. Accordingly, the specification and figures are to be regarded in an illustrative rather than a restrictive sense, and all such modifications are intended to be included within the scope of present invention. The benefits, advantages, solutions to problems, and any element(s) that may cause any benefit, advantage, or solution to occur or become more pronounced are not to be construed as a critical, required, or essential features or elements of any or all the claims.