Electronic device with magnetic field sensor design for detection of multiple accessories

An electronic device is disclosed. The electronic device includes a device magnet designed to magnetically couple with an accessory device magnet. The electronic device further includes a display assembly and a magnetic field sensor configured to detect the accessory device magnet, thereby providing an indication that the accessory device is covering the display assembly. The electronic device further includes a shunt assembly designed to reduce the magnitude of the magnetic field of the device magnet, as determined by the magnetic field sensor, while allowing the magnetic field from the accessory device to sufficiently reach the magnetic field sensor. As such, the magnetic field sensor can be placed near the device magnet without triggering the magnetic field sensor. The electronic device may further include a microphone. Communication between the microphone and an integrated circuit can cease based on the magnetic field sensor detecting the accessory device magnet.

FIELD

The following description relates to electronic devices. In particular, the following description relates to electronic devices, including portable electronic devices, with modifications designed to limit or prevent transmission of magnetic flux using a shunt assembly so as to prevent detection of the magnetic flux by a magnetic field sensor. However, while the shunt assembly limits transmission of magnetic flux by some magnets, the shunt assembly can allow or enhance transmission of magnetic flux by other magnets so as to promote detection of magnetic flux by the magnetic field sensor. Regarding the latter, the shunt assembly can promote compatibility of multiple accessory devices with the electronic device. Further, the magnetic field sensor can be used as an input to prevent communication by a microphone as an input to an integrated circuit.

BACKGROUND

Electronic devices use sensors to detect the presence of an accessory device. For example, an electronic device may use a sensor to determine whether a display of the electronic device is covered by the accessory device, and the electronic device can determine whether to activate or deactivate the display based upon whether the display is uncovered or covered, respectively. Additionally, in order to render multiple accessory devices compatible with the electronic device, the electronic device includes multiple sensors, with some sensors positioned in a particular location (of the electronic device) to detect a particular accessory device.

However, additional design modifications to electronic device can create certain drawbacks. For example, some electronic device with increased battery dimensions (offering longer device usage times) can limit the number of locations for a sensor. Further, when the sensor is a magnetic field sensor used to detect a magnet in an accessory device, the magnetic field sensor should not be placed in proximity to magnets within the electronic device for risk of the magnetic field sensor detecting the magnets within the electronics device. By limiting the location of the magnetic field sensor, similar corresponding limitations must be placed on the magnets (used as targets) in the accessory devices. Accordingly, without additional modifications, a magnetic field sensor within the electronic device has considerable limits.

SUMMARY

In one aspect, an electronic device is described. The electronic device may include a display assembly. The electronic device may further include an enclosure coupled with the display assembly. The enclosure can define an internal volume that carries components. The components may include a device magnet that emits a first magnetic field. The components may further include a magnetic field sensor configured to generate a switching signal based upon detection of at least a threshold magnetic field. The components may further include a shunt assembly that alters the first magnetic field below the threshold magnetic field at the magnetic field sensor. In some embodiments, the magnetic field sensor provides the switching signal based upon detection of a second magnetic field from a magnet external to the enclosure and the display assembly.

In another aspect, an electronic device is described. The electronic device may include a display assembly. The electronic device may further include an enclosure coupled with the display assembly. The enclosure can define an internal volume that carries components. The components may include a device magnet that emits a magnetic field. The components may further include a magnetic field sensor configured to provide a switching signal when an external magnetic field provided by an external magnet is detected. The components may further include an integrated circuit. The components may further include a microphone electrically coupled with the integrated circuit. The components may further include a switching circuit that forms a circuit with the microphone and the integrated circuit. In some embodiments, the switching circuit opens the circuit when the magnetic field sensor provides the switching signal. The components may further include a shunt assembly that at least partially absorbs the magnetic field by the device magnet such that the magnetic field sensor does not detect the magnetic field.

In another aspect, an electronic device is described. The electronic device may include a display assembly. The electronic device may further include an enclosure coupled with the display assembly. The enclosure can define an internal volume that carries components. The components may include a microphone. The components may further include an integrated circuit. The components may further include a magnetic field sensor configured to provide an electrical signal based upon detection of a threshold magnetic field. In some embodiments, the microphone is deactivated when the integrated circuit receives the electrical signal. The components may further include a device magnet that emits a first magnetic field greater than the threshold magnetic field. The components may further include a shunt assembly that alters that at least partially absorbs the first magnetic field, thereby reducing the first magnetic field to a second magnetic field at the magnetic field sensor. The second magnetic field may be less than the threshold magnetic field.

Those skilled in the art will appreciate and understand that, according to common practice, various features of the drawings discussed below are not necessarily drawn to scale, and that dimensions of various features and elements of the drawings may be expanded or reduced to more clearly illustrate the embodiments of the present invention described herein.

DETAILED DESCRIPTION

The following disclosure relates to electronic devices, such as mobile wireless computing devices (including smartphones and tablet computing devices). In particular, the electronic devices described herein includes modifications and enhancements that allow an electronic device to rely upon a magnetic field sensor to detect a magnet in different accessory devices, despite the varying location of the magnet in the respective accessory devices. By detecting the magnet in the accessory device, the magnetic field sensor can signal to the electronic device that a display assembly (of the electronic device) is covered by the accessory device, and the electronic device can subsequently deactivate the display assembly. In order for the magnetic field sensor to detect magnets in different (relative) positions in different accessory devices, the location of the magnetic field sensor can be relocated within the electronic device. However, the relocated magnetic field sensor may be positioned in proximity to a magnet within the electronic device.

In order to prevent unwanted detection of the magnet(s) within the electronic device, electronic devices described herein may include a shunt assembly. A shunt assembly described herein may include one or more magnetic shunts designed to prevent the magnetic field from detection by the magnetic field sensor. For example, the shunt assembly can redirect, or divert, the magnetic field generated by a magnet(s) within the electronic device, and as a result, the magnetic field sensor does not detect the magnetic field. Alternatively, the shunt assembly may minimize the magnetic field generated by the magnet(s) such that the magnetic field detected by the magnetic field sensor is below a threshold magnetic field required trigger the magnetic field sensor and generate an electrical (indicating the presence of a magnet).

While shielding the magnetic field sensor from a magnetic field from magnets within the electronic device, the shunt assembly may allow detection of magnetic fields by magnets external to the electronic device. Moreover, the shunt assembly may direct a magnetic field from a magnet within accessory devices to the magnetic field sensor. As a result, the magnetic field sensor can detect the magnetic field while the magnet in the accessory devices is not directly aligned with the magnetic field sensor. In other words, the magnet in the accessory device may be offset with respect to the magnetic field sensor. This allows the magnetic field sensor to detect a magnet positioned in different locations, with the differing locations being a function of different accessory devices that are compatible with the electronic device.

Additionally, electronic devices described herein may include various input modules designed to capture user-generated information. For example, an electronic device may include a microphone designed to capture audible sound and provide electrical signals in accordance with the audible sound. In order to enhance privacy, the microphone can be deactivated when the magnetic field sensor detects the magnet in the accessory device. In some exemplary embodiments, the electrical signal generated by the magnetic field sensor (in response to detecting the magnet) can be used to disable the microphone, rendering the microphone unable to communicate with an integrated circuit, such as a system-on-chip (“SOC”), used to process the electrical signals provided by the microphone. As a result, the microphone is disabled and unable to communicate with the integrated circuit.

Moreover, the electrical signal provided by the magnetic field sensor can deactivate the microphone without intervening processes and/or controls by the integrated circuit. For example, the electronic device may include a switching circuit that forms a circuit with the microphone and the integrated circuit. When the switching circuit receives the electrical signal from the magnetic field sensor, the switching circuit opens a circuit, thereby preventing the microphone from communicating with the integrated circuit. The switching circuitry is designed to operate without a control signal(s) from the integrated circuit. Further, in some exemplary embodiments, the integrated circuit is unaware the microphone is unable to provide an input (in the form of electrical signals corresponding to audible sounds received by the microphone). In this manner, the integrated circuit does not monitor the microphone with respect to the ability of the microphone to communicate with the integrated circuit in an intended/desired manner. As a result, electronic devices described herein may include a disabling mechanism for preventing communication between the microphone and the integrated circuit without providing notification to the integrated circuit, with the disabling event triggered by the magnetic field sensor detecting a magnet, which corresponds to an accessory device covering the display of the electronic device. This feature may enhance a user's privacy as the electronic device will not “listen” to the user, i.e., the microphone will not relay audible sound (from the user) to the integrated circuit for further processing and/or memory storage.

FIG.1illustrates a front isometric view of an embodiment of an electronic device100. In some embodiments, electronic device100is a laptop computing device or a desktop computing device. In the embodiment shown inFIG.1, electronic device100is a mobile wireless communication device, such as a smartphone or a tablet computing device.

As shown, electronic device100may include an enclosure102, or housing, that provides a protective body as well as defines an internal volume, or cavity, that receives several components, such as processing circuitry, memory circuitry, batteries, speaker modules, microphones, cameras, antennae, and flexible circuits that electrically couples together the various components. Enclosure102may include a metal, such as aluminum, steel (including stainless steel), or a metal alloy that includes the aforementioned metals (as non-limiting examples). Alternatively, enclosure102may include non-metals, such as plastic or glass (as non-limiting examples).

Electronic device100may further include a display assembly104. Display assembly104may include a touchscreen with capacitive touch input capabilities designed to receive user inputs and gestures. Electronic device100may further include a protective layer106that covers/overlays display assembly104. Protective layer106can be formed from a transparent material, such as glass, plastic, or sapphire (as non-limiting examples). In order to receive additional inputs, electronic device100may further include a button108aand a button108b(each protruding through a respective opening of enclosure102). Buttons108aand108bmay be depressed to actuate a respective switch (not shown inFIG.1) of electronic device100.

Electronic device100may include a port112designed to electrically couple with an external source (not shown inFIG.1), which may include an external data source and/or an external power source. Electronic device100may further include openings114aand openings114b, both formed in enclosure102. Openings114aand114bmay allow for acoustical energy transmission, in the form of audible sound, through enclosure102. In this manner, electronic device100may include audio speakers and microphones (not shown inFIG.1) that communicate with the external environment. Additionally, electronic device100may include a camera module116adesigned to capture still images and motion (video) images.

FIG.2illustrates a rear isometric view of electronic device100shown inFIG.1. As shown, electronic device100includes a camera assembly115, which includes a camera module116band a camera module116c. Camera modules116band116cmay provide any features described for camera module116a(shown inFIG.1), as well as additional resolution and zoom capabilities. Camera assembly115may further include a flash module118used to provide additional lighting during an image capture event by camera module116band/or camera module116c. Electronic device100may further include a non-metal component120that defines a radio frequency (“RF”) window. Non-metal component120may include plastic, glass, and/or resin. In this manner, non-metal component120allows RF transmission to and from antennae (not shown inFIG.2) of electronic device100. Electronic device100may further include a switch122that can be toggled by a user to change a configuration of electronic device100, such as muting the audio speakers of electronic device100. Also, electronic device100may include contacts123. Contacts123may define electrical contacts designed to electrically couple electronic device100with an accessory device (not shown inFIG.2).

FIG.3illustrates a plan view of electronic device100shown inFIG.1, showing various internal components of electronic device100. For purposes of simplicity and illustration, display assembly104and protective layer106(shown inFIG.1) are removed. Also, several additional components, such as flexible circuitry, are not shown. Electronic device100may include several speaker modules, such as a speaker module124a, a speaker module124b, a speaker module124c, and a speaker module124d. Although not shown inFIG.3, electronic device100may include additional speaker modules. Further, electronic device100may include a microphone125, or audio transducer, designed to receive audible sound and transmit information, in the form electrical signals, in accordance with the audible sound. In order for microphone125to receive audible sound external to electronic device100, enclosure102may include an opening127.

Electronic device100may include a power supply126(or battery) that provides electrical energy to operational components of electronic device100. Electronic device100may further include a circuit board128that carries several components, such as processing circuits, memory circuits, integrated circuits (including application-specific integrated circuits, a central processing unit, system-on-chip (“SOC”), and a graphics processing unit, as non-limiting examples). As shown, an integrated circuit129is electrically coupled to circuit board128. Integrated circuit129may include a SOC, as a non-limiting example, electrically coupled to microphone125(as well as additional microphones of the electronic device). In this regard, microphone125provides an input, in the form of electrical signals, to integrated circuit129.

Electronic device100may further include an antenna130for wireless communication. Antenna130(representative of one or more antennae) may include an antenna that supports BLUETOOTH® or WI-FI® communication. Although not shown, electronic device100may include additional antennae in other locations, and as a result, electronic device100can support not only BLUETOOTH® and WI-FI® communication, but also cellular network communication.

Electronic device100may further include several magnets designed to magnetically couple with magnets in accessory devices (not shown inFIG.3) that are compatible with electronic device100. For example, electronic device100includes a magnet132aand a magnet134a, each of which are representative of additional magnets, designed to secure an accessory device to a sidewall103, which defines an edge region of enclosure102. Additionally, electronic device100includes a magnet136aand a magnet138a, each of which are representative of additional magnets, designed to secure an accessory device to a bottom wall105, which defines rear or back wall of enclosure102. The magnets located within, or carried by, electronic device100, may be referred to as device magnets.

Some accessory devices are designed to cover electronic device100, and in particular, display assembly104(shown inFIG.1). As a result, when display assembly104is covered by an accessory device (shown later), it is generally advantageous to deactivate (i.e., disable or turn off) display assembly104. In this regard, electronic device100may include a sensor140aand a sensor140b. In some embodiments, sensors140aand140bare magnetic field sensors, which may include a Hall Effect sensor or an anisotropic magneto-resistive (“AMR”) sensor (as non-limiting examples). When sensors140aand140bare magnetic field sensors, sensors140aand140bcan each detect a magnetic field through display assembly104from a magnet located in an accessory device (not shown inFIG.3) that covers display assembly104. Further, sensors140aand140bcan be triggered by either polarity, i.e., either a North Pole or South Pole. Sensors140aand140bcan subsequently provide a switching signal to integrated circuit129. Based on the programming logic, when integrated circuit129receives an electrical signal from sensors140aand140b, integrated circuit129can provide a command to deactivate display assembly104. When integrated circuit129no longer receives a respective electrical signal from sensors140aand140b, integrated circuit129can provide a command to activate display assembly104.

Ideally, sensors140aand140bare sufficiently displaced from magnets within electronic device100so as to prevent sensor140aand/or sensor140bfrom false triggering, i.e., detecting magnetic fields from magnets within electronic device100. While sensor140bis sufficiently displaced from magnets within electronic device100, sensor140ais within proximity of magnet132asuch that a magnetic field (not shown inFIG.3) emanating from magnet132acan be detected by sensor140a. However, electronic device100includes a shunt assembly150designed to prevent or limit the magnetic field generated by magnet132a(as well as any other nearby magnet) from detection by sensor140a. Shunt assembly150includes a size and shape, as well as a position within the electronic device, that reduces the magnetic field such that magnet132a(as well as any other nearby magnet) does not provide a threshold magnetic field at sensor140a. Furthermore, shunt assembly150does not prevent sensor140afrom detecting a magnetic field from a magnet external to electronic device100, such as a magnet in an accessory device. This will be shown and described below.

Shunt assembly150, also referred to as a magnetic shunt assembly, may include a shunt element152aand a shunt element152b, also referred to as a first shunt element and a second shunt element, respectively, or a first magnetic shunt and a second magnetic shunt, respectively. The components of shunt assembly150may include a metal, such as stainless steel (as a non-limiting example). As shown, sensor140ais located on shunt element152b. While a particular location is shown for the placement of sensor140aon a surface shunt element152b, sensor140acan generally be placed anywhere on the surface of shunt element152b.

Additionally, when sensor140adetects the magnetic field, the electrical signal initiated by sensor140acan be used to open a circuit between integrated circuit129and microphone125(as well as any additional microphones). In this regard, the electronic device100may further include a switching circuit141. Switching circuit141may include a 2-, 3-, or 4-wire switch (as non-limiting examples), including a solid-state 2-, a 3-, or 4-wire switch. Switching circuit141is electrically coupled to sensor140a, microphone125, and integrated circuit129. When sensor140adetects a magnetic field (at or greater than a threshold magnetic field) and generates the electrical signal in accordance with the detected magnetic field, switching circuit141receives the electrical signal provided by sensor140aand opens the circuit between microphone125and integrated circuit129. As a result, integrated circuit129does not receive communication/input electrical signals provided by microphone125.

Additionally, the electrical signal provided by sensor140aneed not be initially processed by integrated circuit129in order to open the circuit between microphone125and integrated circuit129. Moreover, based the aforementioned design logic, integrated circuit129is not provided with information related to the open circuit caused by switching circuit141, and thus does not actively monitor whether microphone125is operating in accordance with the desired function of detecting audible sound. As a result, a user of electronic device100may enjoy enhanced privacy as integrated circuit129cannot receive and process electrical signals from the microphone, nor is integrated circuit129provided with information that switching circuit141has opened the circuit and ceased communication between microphone125and integrated circuit129. When switching circuit141no longer receives the electrical signal from the sensor140a, the switching circuit141closes, thereby allowing microphone125to again communicate with the integrated circuit129.

FIG.4illustrates an isometric view of electronic device100, showing the layout of several magnets and shunt assembly150. In addition to magnet132a, electronic device100includes a magnet132band a magnet132cused to secure electronic device100to an accessory device (not shown inFIG.5) along sidewall103of enclosure102. Further, in addition to magnet136a, electronic device100includes a magnet136b, a magnet136c, and a magnet136dused to secure electronic device100to an accessory device (not shown inFIG.5) along bottom wall105of enclosure102.

As shown, sensor140ais positioned in proximity to magnet132a, and would otherwise detect the magnetic field from magnet132a. In other words, magnet132acan generate a magnetic field capable of triggering sensor140a, i.e., magnet132acan provide a magnetic field at or above a threshold magnetic field required to trigger sensor140a. However, shunt assembly150sufficiently minimizes the magnetic field from magnet132a(as well as other magnets in electronic device100that could be detected by sensor140a) such that the magnitude of the magnetic field is below a threshold magnetic field required to trigger sensor140a.

FIG.5illustrates a side view of shunt assembly150and sensor140a, in accordance with some described embodiments. As shown, shunt elements152aand152bare separated by a gap154. Gap154may be approximately in the range of 0.10 to 0.25 millimeters (“mm”). In some embodiments, gap154is 0.15 mm. Gap154provides resistance against magnetic flux provided by a magnet, such as magnet132a(shown inFIG.4). In this manner, any magnetic flux provided by a magnet is not only reduced by shunt element152a, but also by the air space defined by gap154.

Also, shunt assembly150(defined by the shunt element152aand the shunt element152b) may include a dimension156, or thickness. Dimension156may be approximately in the range of 0.50 to 2.0 mm. Shunt assembly150, having dimension156, provides a relatively decreased reluctance (as compared to shunts having a dimension less than dimension156). In this manner, magnetic flux from a magnet external to electronic device100(shown inFIG.4) can more readily pass through shunt element152b, thereby placing magnetic field in proximity to sensor140aso that sensor140acan more easily detect the magnetic field. This will be shown below.

FIG.6illustrates a plan view of electronic device100, showing shunt assembly150altering the magnetic flux provided by magnet132a. A dotted line133defines a boundary to which the magnetic flux of magnet132aextends. Based on the location of shunt assembly150and the placement of the sensor140aon shunt assembly150, the magnetic flux provided by magnet132adoes not reach the sensor140a. In other words, the threshold magnetic field required for sensor140ato detect a magnet is not met. This is due in part to the position of shunt element152abetween magnet132aand sensor140a, as well as gap154(labeled inFIG.5).

FIG.7illustrates an isometric view of electronic device100and an accessory device200suitable for use with electronic device100, in accordance with some described embodiments. Accessory device200is designed as a complementary device for electronic device100. As shown, accessory device200may include a first section202aand a second section202brotationally connected to first section202aby a hinge204a. First section202adefines a receiving surface for electronic device100. First section202aincludes a first segment206aand a second segment206brotationally connected to first segment206aby a hinge204b. In order to secure electronic device100with accessory device200at first section202a, electronic device100includes a magnet136aand a magnet136bthat magnetically couple with a magnet236a(in the first segment206a) and a magnet236b(in second segment206b), respectively. Further, first section202aincludes an opening207to enable camera assembly115to capture images through first section202a.

Second section202bmay include a keyboard208that includes several keys (not labeled) arranged in a QWERTY configuration, as a non-limiting example. In order for electronic device100to communicate with keyboard208, first section202aincludes contacts223that electrically couple with contacts123of electronic device100. Also, second section202bmay further include one or more channels designed to provide sub-flush regions to receive electronic device100. For example, second section202bmay include a first channel212aand a second channel212b, each of which is designed to receive electronic device100(or a portion of electronic device100) in order to position electronic device100in a manner such that electronic device100(and in particular, display assembly104) can be used with keyboard208. In order to maintain electronic device100within first channel212aor the second channel212b, several magnets (not shown inFIG.7) are embedded in second section202band magnetically couple with magnets132a,132b,132c, as well as a magnet132d, a magnet132e, and a magnet132fof electronic device100.

Second section202bcan rotate relative to first section202aand cover display assembly104. In order to remain secured over display assembly104, second section202bmay include additional magnets (not shown inFIG.7) designed to magnetically couple with additional magnets (not shown inFIG.7) in electronic device100. Moreover, in order for electronic device100to determine whether second section202bof accessory device200is covering display assembly104, the sensors140aand140bcan detect a magnet238aand a magnet238b, respectively, when second section202bcovers/overlays display assembly104. While shunt assembly150reduces (or prevents) the magnetic flux from magnet132afrom being detected by sensor140a, shunt assembly150does not prohibit the magnetic flux from magnet238afrom reaching the sensor140a. As a result, magnet238aprovides a magnetic field (at sensor140a) that is at or above the threshold magnetic field required to trigger the sensor140a. In this manner, sensor140agenerates an electrical signal indicating magnet238ais detected. When each of sensors140aand140bgenerates an electrical signal, electronic device100uses the respective electrical signals to determine display assembly104is covered by second section202bof accessory device200, and deactivates display assembly104. Furthermore, electronic device100can disable microphone125based on the electrical signals provided by sensor140a. This will be shown and described below.

FIG.8illustrates a side view of electronic device100and accessory device200shown inFIG.7, showing accessory device200covering electronic device100. As shown, first section202acovers a rear portion of electronic device100, while second section202bcovers a front portion of electronic device100. When electronic device100is covered by accessory device200, accessory device200may define a closed position. In the closed position, the magnetic field from magnet238ain second section202bis detected by sensor140a, and the magnetic field from magnet238bin second section202bcan be detected by sensor140b. Further, shunt element152bof shunt assembly150does not impede the magnetic flux from magnet238ain accessory device200, while shunt element152aof shunt assembly150impedes the magnetic flux from magnet132ain electronic device100.

FIG.9illustrates a plan view of electronic device100and accessory device200in the closed position (shown inFIG.8), showing the relationship between magnet238aof accessory device200and sensor140aof electronic device100. As shown, second section202bis covering the front portion of electronic device100. Generally, second section202bis directly over electronic device100. However, magnet238ais offset (or not directly over) sensor140a. Magnet238ais nonetheless detected by sensor140a, due in part to shunt assembly150.

FIG.10illustrates a side view of electronic device100and accessory device200in the closed position (shown inFIG.8), showing sensor140adetecting magnet238ain accessory device200. As shown, shunt assembly150facilitates the magnetic flux of magnet238aby allowing the magnet flux to pass through shunt element152bin a manner in which sensor140acan detect the magnetic flux. Conversely, shunt assembly150impedes the magnetic flux of magnet132aby absorbing, through shunt element152a, and providing, by gap154, additional resistance to the magnetic flux. Accordingly, sensor140acan distinguish between magnet238aand magnet132a. In particular, sensor140acan distinguish between the magnetic field provided by magnet238aand the magnetic field provided by magnet132asuch that sensor140ais only triggered by the magnetic field provided by magnet238a. Accordingly, the magnitude, as determined by sensor140a, of the magnetic field of magnet238ais greater than that of magnet132a. In other words, the magnitude of the magnetic field of magnet238ais greater than that of magnet132aat a location corresponding to the location of sensor140a. It should be noted that the position of sensor140arelative to magnet132awould otherwise allow sensor140ato detect the magnetic field from magnet132awithout the integration of shunt assembly150.

Shunt assembly150can act as a filter, including a magnetic field filter, for sensor140a, by reducing the magnetic flux from magnet132a, thereby increasing the signal-to-noise ratio (“SNR”) and increasing the likelihood of proper detection of a magnetic field by sensor140a. Moreover, the facilitation by shunt assembly150of magnetic flux from magnet238ato sensor140amay also increase the SNR. Accordingly, the reduction of the magnetic flux from magnet132acoupled with the facilitation of the magnet flux from magnet238acan also improve the SNR. In this manner, the difference between the lowest trigger value (corresponding to the lowest magnitude of magnetic field detected by sensor140a) and the greatest non-triggering value (corresponding to the highest magnitude of magnetic field that is not detected by sensor140a) is greater, corresponding to an increase in the likelihood of less “false triggers,” i.e., detection of magnetic fields by sensor140aother than the desired magnetic field.

FIG.11illustrates an isometric view of electronic device100and an alternate embodiment of an accessory device300suitable for use with electronic device100. Accessory device300is designed as yet another complementary device for electronic device100. As shown, accessory device300includes a first section302arotationally coupled to a second section302bby a hinge304. First section302amay define a back cover or back panel for electronic device100. Also, first section302amay define a receiving surface306that receives a rear portion of electronic device100. In order to secure electronic device100with accessory device300at first section302a, electronic device100includes a magnet136aand a magnet136bthat magnetically couple with a magnet336aand a magnet336b, respectively, of first section302a. Further, first section302aincludes an opening307to enable camera assembly115to capture images through first section302a.

Second section302bis designed to wrap around and cover electronic device100, including display assembly104. In this manner, second section302bmay be referred to as a front panel or front cover. Second section302bmay include multiple segments. For example, second section302bmay include a first segment308a, a second segment308b, and a third segment308c. Each segment is rotatable or moveable with respect to the remaining segments. Also, while a discrete number of segments are shown, the number of segments may vary in other embodiments.

In order to remain secured over display assembly104, second section302bmay include additional magnets (not shown inFIG.11) designed to magnetically couple with additional magnets (not shown inFIG.11) in electronic device100. Moreover, in order for electronic device100to determine whether second section302bof accessory device300is covering display assembly104, sensors140aand sensor140bcan detect a magnet338aand a magnet338b, respectively, when second section302bcovers/overlays display assembly104. In a manner similar to a prior embodiment, shunt assembly150reduces (or prevents) the magnetic flux from magnet132afrom being detected by sensor140a, but does not prohibit the magnetic flux from magnet338afrom reaching sensor140a. As a result, magnet338aprovides a magnetic field (at sensor140a) that is at or above the threshold magnetic field required to trigger sensor140a. Also, when each of sensors140aand140bgenerates an electrical signal, electronic device100uses the respective electrical signals to determine display assembly104is covered by second section302bof accessory device300, and deactivates display assembly104.

FIG.12illustrates a plan view of electronic device100and accessory device300in the closed position, showing the relationship between magnet338aof accessory device300and sensor140aof electronic device100. The “closed position” refers to a position similar to what is shown inFIG.8. As shown, second section302bis covering the front portion of electronic device100. Generally, second section302bis directly over electronic device100. However, magnet338ais offset (or not directly over) sensor140a. Moreover, the offset position is different from the offset position shown inFIG.9between magnet238aand sensor140a. Magnet338ais nonetheless detected by sensor140a, due in part to shunt assembly150.

FIG.13illustrates an isometric view of electronic device100and an alternate embodiment of an accessory device400suitable for use with electronic device100. Accessory device400is designed as yet another complementary device for electronic device100. As shown, accessory device400includes a first section402aand a second section402brotationally coupled to first second by a hinge404a. First section402aincludes a first segment406aand a second segment406brotationally coupled to first segment406aby a hinge404b. In order to secure electronic device100with accessory device400at first section402a, electronic device100includes a magnet136aand a magnet136bthat magnetically couple with a magnet436a(in first segment406a) and a magnet436b(in second segment406b), respectively. Further, first section202aincludes an opening407to enable camera assembly115to capture images through first section402a.

Second section402bmay include a keyboard408that includes several keys (not labeled) arranged in a QWERTY configuration, as a non-limiting example. In order for electronic device100to communicate with keyboard408, first section402aincludes contacts423that electrically couple with contacts123of electronic device100. Also, first section402ais designed to provide a support structure that carries, supports, and suspends electronic device100so that electronic device100is not in contact with second section402b, and electronic device100and keyboard408are both viewable by a user. Additionally, in order to charge electronic device100, accessory device400includes a port410designed to receive a connector (not shown inFIG.13) that provides electrical energy to electronic device100, via contacts423and contacts123, to charge a power supply (not shown inFIG.13) of electronic device100.

In an alternate configuration, second section402bcan rotate relative to first section402aand cover display assembly104. In order to remain secured over display assembly104, second section402bmay include additional magnets (not shown inFIG.13) designed to magnetically couple with additional magnets (not shown inFIG.13) in electronic device100. In a manner similar to prior embodiments, shunt assembly150reduces (or prevents) the magnetic flux from magnet132afrom being detected by sensor140a, shunt assembly150reduces (or prevents) the magnetic flux from magnet132afrom being detected by sensor140a, but does not prohibit the magnetic flux from magnet438afrom reaching sensor140a. As a result, magnet438aprovides a magnetic field (at sensor140a) that is at or above the threshold magnetic field required to trigger sensor140a. Also, when each of sensors140aand140bgenerates an electrical signal, electronic device100uses the respective electrical signals to determine display assembly104is covered by second section402bof accessory device400, and deactivates display assembly104.

FIG.14illustrates a plan view of electronic device100and accessory device400in the closed position, showing the relationship between magnet438aof accessory device400and sensor140aof electronic device100. The “closed position” refers to a position similar to what is shown inFIG.8. As shown, second section402bis covering the front portion of electronic device100. Generally, second section402bis directly over electronic device100. However, magnet438ais offset (or not directly over) sensor140a. Moreover, the offset position is different from the offset position shown inFIG.9between magnet438aand sensor140a, and also different from the offset position shown inFIG.12between magnet338aand sensor140a. Magnet438amay nonetheless be detected by sensor140a.

The foregoing embodiments show that based on the integration of shunt assembly150, sensor140aneed not be directly aligned along a particular axis with respect to a magnet to be detected by sensor140a. As a result, electronic device100is compatible with at least three accessory devices, each with a magnet that can be detected by sensor140a, while these magnets are in different offset positions. It should be noted, however, that sensor140acan detect magnets in direct alignment (i.e., along a single axis) with respect to sensor140a.

Also, the aforementioned accessory devices include a magnet, or triggering magnet, designed to trigger a sensor (e.g., magnetic field sensor) in electronic device100. Based on empirical data, the lowest magnitude (in absolute value) of the magnetic flux that triggered the sensor140aranged from 23.7 Millitesla (“mT”) to 68.9 mT, while the greatest release value (or un-triggering value) ranged from 8.1 mT to 0.1 mT. When compared to data in which a shunt assembly was not used, the difference between the lowest magnitude that triggered the sensor and the greatest release value was significantly less. Accordingly, the shunt assembly provides a virtual hysteresis that can prevent the sensor from false triggering.

FIGS.15-18show and describe various modifications to shunt assemblies. The shunt assemblies shown and described inFIGS.15-18may substitute for shunt assembly150(previously shown).

FIG.15illustrates an isometric view of an alternate embodiment of an electronic device500, showing an alternate layout of a shunt assembly550. Electronic device500may include several features previously shown and described for electronic device100(shown inFIG.1). As shown, electronic device500includes a magnet532(representative of additional, unlabeled magnets) used to secure electronic device500to an accessory device (not shown inFIG.15) along a sidewall503of enclosure502. Further, electronic device500may include a magnet536(representative of additional, unlabeled magnets) used to secure electronic device500to an accessory device (not shown inFIG.15) along a bottom wall505of enclosure502.

Shunt assembly550includes a shunt element552aand a shunt element552bseparated by a gap (not labeled; similar to gap154shown inFIG.5). Shunt element552amay include a dimension (i.e., major length) that is the same as, or substantially similar to, a dimension (i.e., major length) of magnet532. For example, as shown, magnet532and shunt element552aincludes the same or similar dimension along the Y-axis. Additionally, magnet532and shunt element552aincludes the same or similar dimension along the Z-axis. This may facilitate installation of magnet532and shunt element552ain electronic device500. Further, magnet532and shunt element552amay be secured together by an adhesive, as a non-limiting example.

As shown, sensor540is positioned in proximity to magnet532, and would otherwise detect the magnetic field from magnet532. However, shunt assembly550sufficiently minimizes the magnetic field from magnet532(as well as other magnets in electronic device500that could potentially be detected by sensor540) such that magnet532(as well as any other magnet in electronic device500) does not provide a magnetic field at or above the threshold magnetic field required to trigger sensor540.

FIG.16illustrates an isometric view of an alternate embodiment of an electronic device600, showing an alternate layout of a shunt assembly650. Electronic device600may include several features previously shown and described for electronic device100(shown inFIG.1). As shown, electronic device600includes a magnet632(representative of additional, unlabeled magnets) used to secure electronic device600to an accessory device (not shown inFIG.16) along a sidewall603of the enclosure602. Further, electronic device600may include a magnet636(representative of additional, unlabeled magnets) used to secure electronic device600to an accessory device (not shown inFIG.16) along a bottom wall605of enclosure602.

Shunt assembly650includes a shunt element652aand a shunt element652bseparated by a gap (not labeled; similar to gap154shown inFIG.5). Shunt element652amay include a dimension (i.e., major length) that is the same as, or substantially similar to, a dimension (i.e., major length) of magnet632. For example, as shown, magnet632and shunt element652aincludes the same or similar dimension along the Y-axis. Additionally, magnet632and shunt element652aincludes the same or similar dimension along the Z-axis. This may facilitate installation of magnet632and shunt element652a. Further, magnet632and shunt element652amay be secured together by an adhesive, as a non-limiting example. Shunt element652bmay include a stepped structure, which may include a single, monolithic piece or two pieces secured together. Shunt element652bcan direct the magnetic field in a certain desired manner. For example, shunt element652bmay direct the magnetic field in a relatively uniform manner, thereby providing increased predictability as to the location of the magnetic field as directed by shunt element652b.

As shown, sensor640is positioned in proximity to magnet632, and would otherwise detect the magnetic field from magnet632. However, shunt assembly650sufficiently minimizes the magnetic field from the magnet632(as well as other magnets in electronic device600that could potentially be detected by sensor640) such that magnet632(as well as any other magnet in electronic device600) does not provide a magnetic field at or above the threshold magnetic field required to trigger sensor640.

FIG.17illustrates an isometric view of an alternate embodiment of an electronic device700, showing an alternate layout of a shunt assembly750. Electronic device700may include several features previously shown and described for electronic device100(shown inFIG.1). As shown, electronic device700includes a magnet732(representative of additional, unlabeled magnets) used to secure electronic device700to an accessory device (not shown inFIG.17) along a sidewall703of enclosure702. Further, electronic device700may include a magnet736(representative of additional, unlabeled magnets) used to secure electronic device700to an accessory device (not shown inFIG.17) along a bottom wall705of enclosure702.

Shunt assembly750includes a shunt element752aand a shunt element752bseparated by a gap (not labeled). Shunt element752amay include a dimension (i.e., major length) that is the same as, or substantially similar to, a dimension (i.e., major length) of magnet732. For example, as shown, magnet732and shunt element752aincludes the same or similar dimension along the Y-axis. Additionally, magnet732and shunt element752aincludes the same or similar dimension along the Z-axis. This may facilitate installation of magnet732and shunt element752a. Further, magnet732and shunt element752amay be secured together by an adhesive, as a non-limiting example. Shunt element752bmay include a stepped structure, which may include two pieces separated by a gap. The gap may be defined by an adhesive, as a non-limiting example. Accordingly, shunt element752bmay be referred to as a shunt sub-assembly. Also, the gap between the two pieces of shunt element752bmay limit or prevent magnetic flux from passing through the lower shunt part to the upper shunt part (on which sensor740is located).

As shown, sensor740is positioned in proximity to magnet732, and would otherwise detect the magnetic field from magnet732. However, shunt assembly750sufficiently minimizes the magnetic field from magnet732(as well as other magnets in electronic device700that could potentially be detected by sensor740) such that magnet732(as well as any other magnet in electronic device700) does not provide a magnetic field at or above the threshold magnetic field required to trigger sensor740.

FIG.18illustrates an isometric view of an alternate embodiment of an electronic device800, showing an alternate layout of a shunt assembly850. Electronic device800may include several features previously shown and described for electronic device100(shown inFIG.1). As shown, electronic device800includes a magnet832(representative of additional, unlabeled magnets) used to secure electronic device800to an accessory device (not shown inFIG.18) along a sidewall803of enclosure802. Further, electronic device800may include a magnet836(representative of additional, unlabeled magnets) used to secure electronic device800to an accessory device (not shown inFIG.18) along a bottom wall805of enclosure802.

Shunt assembly850includes a shunt element852astacked over a shunt element852b. Shunt element852ais separated from shunt element852bby a gap (not labeled). The gap may be defined by an adhesive, as a non-limiting example. Shunt elements852aand852bmay generally include the same size and shape. Optionally, shunt assembly850may include a shunt element852c(shown as a dotted line). Shunt element852cmay include a dimension (i.e., major length) that is the same as, or substantially similar to, a dimension (i.e., major length) of magnet832along the Y-axis.

As shown, sensor840is positioned in proximity to magnet832, and would otherwise detect the magnetic field from magnet832. However, shunt assembly850sufficiently minimizes the magnetic field from magnet832(as well as other magnets in electronic device800that could potentially be detected by sensor840) such that magnet832(as well as any other magnet in electronic device800) does not provide a magnetic field at or above the threshold magnetic field required to trigger sensor840.

FIG.19illustrates a schematic diagram of an embodiment of an electronic device900and an accessory device1000. Electronic devices and accessory devices shown and described in the foregoing detailed description may incorporate the features shown for electronic device900and accessory device1000, respectively. Electronic device900and accessory device1000may include several features previously shown and described for electronic devices and accessory devices, respectively.

As shown, electronic device900includes an integrated circuit929designed perform one or more functions. Integrated circuit929may include a SOC, as a non-limiting example. Integrated circuit929is electrically coupled with a display assembly904, which may include touch input display assembly. Electronic device900further includes a power supply926, or battery, designed to provide electrical energy to operational components of electronic device900.

Electronic device900further includes a sensor940aand a sensor940b, each of which may include a magnetic field sensor (e.g., Hall Effect sensor or AMR sensor). Sensors940aand940bcan detect a magnet1038aand a magnet1038b, respectively, of accessory device1000, and subsequently generate and provide electrical signals to integrated circuit929. Integrated circuit929uses the electrical signals to determine accessory device1000is covering display assembly904, and can subsequently deactivate display assembly904. Also, sensor940amay be positioned on a shunt assembly950designed to minimize magnetic fields from magnets (not shown inFIG.19) within electronic device900, while allowing (and in some instances, enhancing) the magnetic field provided by magnet1038a.

Additionally, electronic device900includes a microphone925designed to capture audible sound generated externally to electronic device900, and provide electrical signals, in accordance with the audible sound, to integrated circuit929. Electronic device900further includes a switching circuit941that forms part of circuit with microphone925and integrated circuit929. Switching circuit941may include any features previously described for a switching circuit.

In order to enhance user privacy, the transmission of electrical signals provided by microphone925to integrated circuit929can be terminated based on an input from sensor940ato switching circuit941. For example, when sensor940adetects the magnetic field from magnet1038a, the electrical signal initiated by sensor940ais further provided to switching circuit941, causing switching circuit941to open the circuit between integrated circuit929and microphone925(as well as any additional microphones). As a result, microphone925is unable to transmit communication (i.e., electrical signals) to integrated circuit929. Moreover, the electrical signal provided by sensor940aneed not be initially processed by integrated circuit929in order for switching circuit941to open the circuit between microphone925and integrated circuit929. Also, based the aforementioned design logic, integrated circuit929is not provided with information related to the open circuit, based on switching circuit941, and thus does not actively monitor whether microphone925is operating in accordance with the desired function of providing electrical signals in accordance with detected audible sound. As a result, a user of electronic device900may enjoy enhanced privacy as integrated circuit929cannot receive and process electrical signals from microphone925in accordance with detected audible sound, nor is integrated circuit929provided with information that switching circuit941has opened the circuit between microphone925and integrated circuit929.

FIG.20illustrates a schematic diagram of an embodiment of an electronic device1100and an accessory device1200. Electronic devices and accessory devices shown and described in the foregoing detailed description may incorporate the features shown for electronic device1100and accessory device1200, respectively. Electronic device1100and accessory device1200may include several features previously shown and described for electronic devices and accessory devices, respectively.

As shown, electronic device1100includes an integrated circuit1129designed perform one or more functions. Integrated circuit1129may include a SOC, as a non-limiting example. Integrated circuit1129is electrically coupled with a display assembly1104, which may include touch input display assembly. Electronic device1100further includes a power supply1126, or battery, designed to provide electrical energy to operational components of electronic device1100.

Electronic device1100further includes a sensor1140aand a sensor1140b, each of which may include a magnetic field sensor (e.g., Hall Effect sensor or AMR sensor). Sensors1140aand1140bcan detect a magnetic field from a magnet1238aand a magnet1238b, respectively, of accessory device1200, and subsequently generate and provide electrical signals to integrated circuit1129. Integrated circuit1129uses the electrical signals to determine accessory device1200is covering display assembly1104, and can subsequently deactivate display assembly1104. Also, sensor1140amay be positioned on a shunt assembly1150designed to minimize magnetic fields from magnets (not shown inFIG.20) within electronic device1100, while allowing (and in some instances, enhancing) the magnetic field provided by magnet1238a.

Additionally, electronic device1100includes a microphone1125designed to capture audible sound generated externally to electronic device1100, and provide electrical signals, in accordance with the audible sound, to integrated circuit1129. Electronic device1100further includes a switching circuit1141that forms part of circuit with microphone1125and integrated circuit1129. Switching circuit1141may include any features previously described for a switching circuit.

In order to enhance user privacy, the transmission of electrical signals provided by microphone1125to integrated circuit1129can be terminated based on an input from sensor1140ato switching circuit1141. For example, when sensor1140adetects the magnetic field from the magnet1238a, the electrical signal initiated by sensor1140ais further provided to switching circuit1141. However, in contrast to the prior embodiment (shown inFIG.19), switching circuit1141can subsequently open the circuit between microphone1125and power supply1126, thereby powering down microphone1125(as well as any additional microphones). As a result, microphone1125is deactivated and will not be provide electrical signals (in accordance with detected audible sounds) to integrated circuit1129, as microphone1125is off. Moreover, the electrical signal provided by sensor1140aneed not be initially processed by integrated circuit1129in order for switching circuit1141to open the circuit between microphone1125and power supply1126. Also, based the aforementioned design logic, integrated circuit1129is not provided with information related to the open circuit, based on switching circuit1141, and thus does not actively monitor whether microphone1125is operating in accordance with the desired function of providing electrical signals in accordance with detected audible sound. As a result, a user of electronic device1100may enjoy enhanced privacy as integrated circuit1129cannot receive and process electrical signals from microphone1125in accordance with detected audible sound, nor is integrated circuit1129provided with information that switching circuit1141has opened the circuit between microphone1125and power supply1126.

FIG.21illustrates a flowchart showing a method1300for deactivating a component of an electronic device, in accordance with some described embodiments. Electronic devices described herein may perform the steps of method1300.

In step1302, a magnetic field from a magnet external to the electronic device is detected by a magnetic field sensor. The magnetic field sensor may include a Hall Effect sensor or an AMR sensor, as non-limiting examples. Also, the magnet may include a magnet located in an accessory device that is compatible with the electronic device.

In step1304, an input is provided by the magnetic field sensor to an integrated circuit of the electronic device. The integrated circuit may include an integrated circuit, such as a SOC (as a non-limiting example). The input may include an electrical signal that is generated by the magnetic field sensor based on detection of the magnetic field by the magnetic field sensor. Once the input is provided to the processing circuitry, the integrated circuit deactivates a display assembly of the electronic device. In some embodiments, the electronic device includes a second magnetic field sensor, and the integrated circuits deactivates the display assembly once both magnetic fields sensors provide an electrical signal.

In step1306, the input is further provided by the magnetic field sensor to switching circuit of the electronic device. The switching circuit may include any features previously described for a switching circuit.

In step1308, the switching circuit opens a circuit between a microphone and the integrated circuit. As a result of the open circuit, there is no transmission of electrical signals from the microphone to the integrated circuit, and accordingly, the integrated circuit is prevented from receiving the electrical signals associated with detected audible sound by the microphone.

The electrical signal sent by the magnetic field sensor need not be processed by the integrated circuit prior to the switching circuit opening the circuit. Despite the microphone being “on” or operational, the integrated circuit is unaware of the open circuit, as the integrated circuit is not provided with any indication that the microphone is inoperable to transmit electrical signals in accordance with the audible sound. As a result, the processing circuit is not actively monitoring the functionality of the microphone for errors related to the open circuit, and does not provide any output or other functionality in accordance with the open circuit between the microphone and the processing circuitry. In this regard, the user of the electronic device may enjoy enhanced privacy, as the microphone is not transmitting electrical signals to the integrated circuit in accordance with the user's audible sound (i.e., the user's voice).

FIG.22illustrates a block diagram of an electronic device1400, in accordance with some described embodiments. The features in electronic device1400may be present in other electronic devices described herein. Electronic device1400may include one or more processors1410for executing functions of electronic device1400. One or more processors1410can refer to at least one of a central processing unit (CPU) and at least one microcontroller for performing dedicated functions. Also, one or more processors1410can refer to application specific integrated circuits.

According to some embodiments, electronic device1400can include a display unit1420. Display unit1420is capable of presenting a user interface that includes icons (representing software applications), textual images, and/or motion images. In some examples, each icon can be associated with a respective function that can be executed by one or more processors1410. In some cases, display unit1420includes a display layer (not illustrated), which can include a liquid-crystal display (LCD), light-emitting diode display (LED), or the like. According to some embodiments, display unit1420includes a touch input detection component and/or a force detection component that can be configured to detect changes in an electrical parameter (e.g., electrical capacitance value) when the user's appendage (acting as a capacitor) comes into proximity with display unit1420(or in contact with a transparent layer that covers display unit1420). Display unit1420is connected to one or more processors1410via one or more connection cables1422.

According to some embodiments, electronic device1400can include one or more sensors1430capable of provide an input to one or more processors1410of electronic device1400. One or more sensors1430may include a temperature sensor, a capacitive sensor, and magnetic field sensors, as a non-limiting example. One or more sensors1430is/are connected to one or more processors1410via one or more connection cables1432.

According to some embodiments, electronic device1400can include one or more input/output components1440. In some cases, one or more input/output components1440can refer to a button or a switch that is capable of actuation by the user. When one or more input/output components1440are used, one or more input/output components1440can generate an electrical signal that is provided to one or more processors1410via one or more connection cables1442.

According to some embodiments, electronic device1400can include a power supply1450that is capable of providing energy to the operational components of electronic device1400. In some examples, power supply1450can refer to a rechargeable battery. Power supply1450can be connected to one or more processors1410via one or more connection cables1452. Power supply1450can be directly connected to other devices of electronic device1400, such as one or more input/output components1440. In some examples, electronic device1400can receive power from another power sources (e.g., an external charging device) not shown inFIG.22.

According to some embodiments, electronic device1400can include memory1460, which can include a single disk or multiple disks (e.g., hard drives), and includes a storage management module that manages one or more partitions within memory1460. In some cases, memory1460can include flash memory, semiconductor (solid state) memory or the like. Memory1460can also include a Random Access Memory (“RAM”) and a Read-Only Memory (“ROM”). The ROM can store programs, utilities or processes to be executed in a non-volatile manner. The RAM can provide volatile data storage, and stores instructions related to the operation of the electronic device1400. In some embodiments, memory1460refers to a non-transitory computer readable medium. One or more processors1410can also be used to execute software applications. In some embodiments, a data bus1462can facilitate data transfer between memory1460and one or more processors1410.

According to some embodiments, electronic device1400can include wireless communications components1470. A network/bus interface1472can couple wireless communications components1470to one or more processors1410. The wireless communications components1470can communicate with other electronic devices via any number of wireless communication protocols, including at least one of a global network (e.g., the Internet), a wide area network, a local area network, a wireless personal area network (WPAN), or the like. In some examples, wireless communications components1470can communicate using NFC protocol, BLUETOOTH® protocol, or WIFI® protocol.