JP5890072B2 - Detection system and method between accessory and electronic device - Google Patents

Description

  The described embodiments generally relate to accessory devices for use with portable electronic devices. More particularly, this embodiment describes passive and active circuits that can be used individually or in combination to identify specific features of an accessory device. The identified features can be used by the portable electronic device, such as to change the operating state of the electronic device, identify specific features of the accessory device, and so forth.

  Recent advances in portable computing include the introduction of computing platforms along with a line of handheld electronic devices and iPad® tablets manufactured by Apple Inc., located in Cupertino, California. These handheld computing devices are displays used to present visual content, leaving a substantial portion of the electronic device leaving little available space for an attachment mechanism that can be used to attach an accessory device. It can be configured to take the form of

  The display may include various user interface features that can interact with external stimuli to convey information from the end user and, for example, processing circuitry in the handheld computing device. For example, the display may include touch sensitive elements that can be used to enable various multi-touch (MT) functions. When the accessory device takes the form of a cover, the handheld computing device may be operable in a mode consistent with the presence of the cover. For example, when a handheld computing device has a display, the presence of the cover can make the display inaccessible. To save power, non-viewable displays can be temporarily disabled until the cover is moved or repositioned to expose the display.

  Therefore, an accurate and reliable technique for determining selected aspects of an accessory device is desired.

  This document describes various embodiments relating to systems, methods and apparatus for passively providing information from an accessory device to a host device. In one embodiment, the accessory device takes the form of a protective cover and the host device takes the form of a tablet computer.

  In one embodiment, an accessory device is described. The accessory device includes at least a flap, and the flap includes a passive information element associated with the accessory device information. The accessory device also includes an attachment mechanism configured to removably attach the accessory device and the electronic device. In the described embodiment, the electronic device includes a processor, a display, an attachment detection mechanism configured to detect that the accessory device is attached to the electronic device, and the accessory device and the electronic device attached to each other. Only when the attachment detection mechanism provides an indication that it has been detected, passive information detection that enables (1) detecting the presence of a passive information element and (2) receiving information from the passive information element Including mechanism.

  In another embodiment, a method for changing an operational state of an electronic device according to accessory device information associated with the accessory device is described. The method includes at least the following operations: an operation of detecting a passive information element by a detection mechanism in the electronic device, an operation of determining accessory device information based on the detection, and an operation state of the electronic device according to the accessory device information. This is done by executing a change operation.

  An apparatus for changing the operating state of an electronic device having a processor and a display will be described. The apparatus includes at least means for detecting a passive information element by a detection mechanism in the electronic device, means for determining accessory device information based on detection of the passive information element, and operation of the electronic device according to the accessory device information. Means for changing the state.

  In yet another embodiment, an accessory device is described. The accessory device includes an attachment mechanism for attaching the accessory device to an electronic device having a display and a processor. The accessory device includes at least a flap having a size and shape corresponding to the display, and an information element. In the described embodiment, the information element is associated with accessory device information, such as when the information element is detected by a detection mechanism in the electronic device. The detection mechanism provides accessory device information to the processor. The processor uses the accessory device information to change the operating state of the electronic device. In general, detection occurs only when the flap and the display are in close proximity to each other.

  In one embodiment, a foldable accessory device is described. The foldable accessory device includes a foldable flap comprising a first end edge, a second end edge, and a connector assembly attached to the foldable flap at the first end edge. The connector assembly includes an attachment mechanism for removably attaching a foldable accessory device to the host device. The host device includes a housing configured to encapsulate and support a display having at least a processor and a top protective layer and configured to present visual content coupled to the processor. The foldable accessory device also includes a hinge configured to pivotally connect the foldable flap and the attachment mechanism. The processor only when the foldable flap and the host device are attached together, 1) determine the foldable flap fold configuration for the host device, and 2) operate the host device according to the fold configuration It becomes possible to make it. When the folded configuration of the folded flap exposes the viewable portion of the display, the host device operates to present visual content in response to the viewable portion of the display.

  In another embodiment, an electronic device is described. The electronic device includes at least a housing having a side wall and a forward opening, a processor disposed in the housing, a first sensor and a second sensor disposed in the housing and coupled to the processor. A display coupled to the sensor and the processor and configured to present visual content, the display being disposed in the forward opening and having a top protective layer and a first of the housing An attachment mechanism disposed on the sidewall and attaching the electronic device to a first end of the active foldable cover. The processor operates to determine a folded state of the foldable cover with respect to the electronic device, and operates the electronic device according to the folded state. The first folded state includes the first portion of the foldable cover being folded away from the display to expose a first portion that is smaller than the full display portion of the display. The visual content is processed and presented according to the first part on the display.

  In another embodiment, a method for operating a tablet device having a display for presenting visual content in response to a folded state of a foldable accessory device is described. The method verifies that the tablet device and the foldable accessory device are attached to each other and determines the foldable state of the foldable accessory device relative to the tablet device only if the attachment is confirmed It is executed by. In the described embodiment, the folded state is determined by detecting a spatial relationship between the first folded portion of the foldable accessory device and the tablet device, wherein the first folded portion is the first of the display. Corresponds to 1 part. Visual content is presented by the tablet device in response to the first portion of the display.

  Other aspects and advantages of the present invention will become apparent from the following detailed description, taken in conjunction with the accompanying drawings, illustrating by way of example the principles of the described embodiments.

  The present invention will be readily understood by the following detailed description in conjunction with the accompanying drawings. In the drawings, the same reference numerals indicate the same structural elements.

1 is a top perspective view of an electronic device according to an described embodiment. FIG. FIG. 2 is a first perspective view of an electronic device in the form of a tablet device and an accessory device in the form of a protective cover. FIG. 4 is a second perspective view of an electronic device in the form of a tablet device and an accessory device in the form of a protective cover. FIG. 3 is a diagram illustrating a closed configuration of the cooperative system formed by the tablet device and the protective cover shown in FIGS. 2A and 2B. It is a figure which shows the open structure of the cooperation system shown to FIG. 3A. FIG. 6 is a plan view of one embodiment of a segmented cover assembly. FIG. 6 is a plan view of another embodiment of a protective cover 200 in the form of a cover assembly. FIG. 6 shows a segmented cover that is a partially open configuration for a tablet device FIG. 6 shows a segmented cover that is a partially open configuration for a tablet device. FIG. 6 shows a segmented cover that is a partially open configuration. FIG. 6 is a diagram of a tablet device in a first peak mode, according to an described embodiment. FIG. 6 is a diagram of a tablet device in a second peak mode, according to an described embodiment. FIG. 6 illustrates a system that includes a protective cover pivotally coupled to a tablet device, in accordance with the described embodiments. FIG. 7 is a diagram illustrating a more generalized version of system 800, in which various information elements are shown. Figure 5 is a flowchart detailing a process according to the described embodiment. Figure 5 is a flowchart detailing a process according to the described embodiment. Figure 5 is a flowchart detailing a process according to the described embodiment. FIG. 6 is a state peak mode state diagram according to the described embodiment. Figure 5 is a flowchart detailing a process according to the described embodiment. Figure 5 is a flowchart detailing a process according to the described embodiment. FIG. 2 is a block diagram of an electronic device suitable for use with the described embodiments.

  Reference will now be made in detail to the exemplary embodiments illustrated in the accompanying drawings. It should be understood that the following description is not intended to limit the embodiments to one preferred embodiment. On the contrary, it is intended to cover variations, modifications, and equivalents that may be included within the spirit and scope of the described embodiments as defined by the appended claims.

  The following description relates generally to mechanisms that can be used to identify features of accessory devices used with electronic devices having a display. The display can be configured to present visual content. In some cases, the display includes a touch sensitive layer configured to sense externally applied stimuli, such as touch events, and in response to provide information that can be used by the electronic device. Can be included. For example, the display can include a capacitive multi-touch (MT) function suitable for recognizing multiple input events applied simultaneously. In certain embodiments, the accessory device takes the form of a protective cover. The protective cover can include a flap pivotally connected to the hinge mechanism. The hinge mechanism can then include an attachment mechanism for removably attaching the protective cover and the electronic device together. The flap can have a size and shape depending on the display. In this way, when the flap is coupled to the tablet device, the flap can be rotated about the hinge portion in a first direction so that the flap is substantially in contact with the display in the closed configuration. Conversely, the flap can be pivoted about the hinge assembly in a second direction opposite the first direction to expose the display or a portion thereof in the open configuration. In one embodiment, the electronic device can take the form of a tablet device.

  The protective cover can provide protection for certain aspects (such as a display) of the tablet device while improving the overall look and feel of the tablet device. The protective cover can include electronic circuits or other elements (passive or active) that can cooperate with elements, electronic components, etc. in the tablet device. As part of that cooperation, for example, sending a signal between the protective cover and the tablet device that can be used to modify the operation of the tablet device, the operation of the electronic circuitry or elements of the protective cover, etc. it can. The signal can also be used to evaluate specific aspects of the protective cover. For example, the protective cover can include one or more objects that can be detected by corresponding elements disposed within the tablet device. The object (s) can provide information to the tablet device that can be used to identify a particular aspect of the protective cover, such as color, style, owner, etc. Objects can be passive or active. For example, passive elements can take the form of magnets and capacitive elements, and active elements can be in the form of RFID tags, near field communication (NFC) elements, wireless elements (such as Bluetooth®), and the like. Can be taken.

The electronic device can include a plurality of sensors. These sensors can include at least a plurality of different types of magnetic sensors. For example, a Hall Effect Sensor (HFX) can simply detect the presence of a magnetic field and provide information according to ON / OFF, “0”, “1”, etc. Not only can multiple magnets be used to encode information, but information can also be encoded using the polarity of the magnets. For example, if the protective cover has n magnets detectable by a corresponding magnetic sensor disposed in the tablet device that can discriminate the magnetic polarity, 2 ⁿ bits of information can be magnetically detected in the protective cover. Can be encoded automatically. In certain embodiments, the number n of the magnet can be four and, in which case the total number of information bits are also 4 represents 2 ⁴ or 32 information states. The 32 information states may include information regarding specific aspects of the protective cover, such as color, style, owner information, date of purchase, etc.

  Linear Hall effect sensors can be used to sense changes in magnet movement, position or magnetic field strength. The difference in magnetic field strength detected by the linear Hall effect sensor can be used to evaluate the current state of the protective cover relative to the tablet device. For example, a detected change in magnetic field strength value may indicate a change in the tablet device / protective cover attachment state or a change in the relative distance between the magnet and the linear Hall effect sensor. . This change in relative distance can indicate that the protective cover has moved relative to the tablet device. For example, a linear Hall effect sensor measuring a relative change in magnetic field strength value of 5 millitesla (mT) indicates that the protective cover has moved to a more open or closed position relative to the tablet device. Can do. It should also be noted that monitoring (or sampling) the field strength values in real time may indicate the movement of the protective cover relative to the tablet device. In this way, it is possible to detect the movement of the protective cover relative to the tablet device and the movement direction of the protective cover relative to the tablet device.

  Certain magnets can be arranged as a magnetic array to enhance the action of the magnets on either the tablet device or the protective cover. One such magnetic array can take the form of a Halbach array. The Halbach array can be interpreted as a one-side magnetic flux structure in which the magnetic field on one side of the Halbach array is increased and the magnetic field on the opposite side of the Halbach array is almost zero. This effect can be realized by arranging a plurality of permanent magnets in a magnetization pattern that rotates spatially. In this way, using a Halbach array to increase the unilateral magnetic field can improve the magnetic attachment between the protective cover and the tablet device, or the detectability of the resulting increased magnetic field.

  In some embodiments, components disposed in or on the protective cover can be used to determine the relationship between the protective cover and the tablet device. For example, when the cover includes magnets (for mounting, information signaling, etc.), these magnets are disposed on adjacent tablet devices (in some cases as magnetic compasses) that can be used as signals. May affect magnetic sensing circuitry (such as the magnetometer used). This signal can then be used to estimate the spatial relationship between the protective cover and the tablet device. For example, when a tablet device includes a magnetic circuit in the form of a magnetic compass, the magnet in the protective cover causes a magnetic offset (referenced generally expressed in degrees “x °”) to the magnetic compass (reference Deviation from the line compass direction). In this way, the magnetic offset value can be used to estimate the relationship between the protective cover and the tablet device. The observed magnetic offset value can be correlated to known tablet / cover configurations such as a magnetically attached fully open configuration, a fully closed configuration, or a partially open configuration. In some cases, it may be desirable to recalibrate the magnetic compass based on the spatial relationship between the cover and the tablet device. For example, when the cover is fully open, the effect of the magnet in the cover on the magnetic compass can be minimal, but the cover is approaching the fully closed position and the compass is viewable (as in peak mode) The effects of the magnets can be greater and require recalibration of the magnetic compass.

  Sensors can also be used to determine the angular displacement of the protective cover and tablet device. For example, a linear Hall effect sensor can be used to detect the angular displacement of the magnet in the cover relative to the linear Hall effect sensor. Angular displacement can be correlated to the magnetic field strength (eg, measured in millitesla or MT) detected by a linear Hall effect sensor, and any change in the detected value can be detected between the tablet device and the protective cover. It can be associated with changes in the spatial relationship between. Changes in the spatial relationship may include pivoting the cover away from or toward the tablet device.

  In another embodiment, when the tablet device includes an image capture device such as a camera or an optical sensor such as an ambient light sensor (ALS) for detecting ambient light levels in the vicinity of the camera, the protective cover allows the optical Sensing indicia can be used to encode information. For example, the protective cover can include appropriately sized and arranged openings that allow a selected amount of light to penetrate the protective cover. For example, a pattern of micro-perforations can be formed on the protective cover, which allows sufficient light to reach the optical sensor along the micro-perforations even though the micro-perforations are not identifiable by the user. In this way, the pattern of light reaching the optical sensor can provide information that can be used by the tablet device. In some cases, the microperforation pattern may resemble a barcode that provides information specific to the protective cover. Such information may include a serial number, style, color, etc. In one embodiment, the ALS can include a photosensitive circuit (such as a photodiode) that can respond to varying levels of incident light, typically in the form of ambient light. The optical sensor can sense light that exceeds the visible spectrum. For example, an infrared (IR) sensor can detect the presence of heat, and a UV sensitive detector can determine the presence of a UV light source such as the sun.

  In one embodiment, the display can include a touch-sensitive surface that can respond to objects embedded in the protective cover. The touch-sensitive surface can include a plurality of elements that can be coupled to some or all of the plurality of objects on or near the protective layer of the display. The coupling, for example, can be capacitive in nature and can provide a signal that can be evaluated by a processor in the tablet device. For example, the signals can be used in controlling certain aspects of tablet device operation. In one embodiment, the object (s) can take the form of conductive elements embedded in the flap of the protective cover. In this way, when the protective cover approaches or contacts the protective layer of the display, the conductive element can interact with the capacitive element and provide a signal to the processor.

  The signal provided to the processor can correspond to the size, position and shape of the conductive object. Thus, the size, position and shape of the conductive object can be associated with information that can be used by the processor. For example, the information can be used by the processor to determine the aspect of the protective cover based on information associated with a particular configuration of the conductive object. Thus, any number of features of the object such as the size, shape, orientation, position, etc. of the object can be used to passively communicate information from the protective cover flap to the processor. This information can then be used by the processor to execute instructions that may be used to perform any number of operations by the tablet device. Information can also be used to convey information specific to the protective cover (such as type, color, style, specific serial number).

  These and other embodiments are described below with reference to FIGS. However, those skilled in the art will appreciate that the “DETAILED DESCRIPTION” described herein with respect to these figures is for illustrative purposes only and should not be construed as limiting. It will be easily understood.

  Electronic devices can take many forms. In the remainder of this discussion, electronic devices will be described in terms of handheld portable computing devices. Accordingly, FIG. 1 shows a top perspective view of an electronic device 10 according to the described embodiment. As an example where the electronic device 10 can process data, and more specifically, media data such as audio, visual, images, etc., the electronic device 10 is typically a smartphone, music player, game player, visual player. It can correspond to a device that can function as a personal digital assistant (PDA), a tablet device, or the like. With respect to being handheld, the electronic device 10 can be operated by the other hand while being held by one hand (ie, no reference surface like a desktop is required). Therefore, the electronic device 10 can provide an operation input command with the other hand while being held with one hand. Manipulation input commands may include manipulating volume switches, hold switches, or manipulating by providing input to a touch sensitive surface such as a touch sensitive display device or touchpad.

  The electronic device 10 can include a housing 12. In some embodiments, the housing 12 is formed of any number of materials, such as plastic or non-magnetic metal, that can be forged, cast, or optionally molded to a desired shape. Single piece housing. If the electronic device 10 has a metal housing and incorporates radio frequency (RF) based functionality, a portion of the housing 12 may include a radio transmissive material such as ceramic or plastic. The housing 12 can be configured to enclose a plurality of internal components. The internal components can be mechanical or structural used to provide support, or can be operational / functional components that can provide a specific set of operations / functionality. . For example, the housing 12 can encapsulate and support various structural components and electrical components (including integrated circuit chips) to provide computing operations to the electronic device 10. Examples of operating components can include integrated circuits, processors, memories, batteries, antennas, circuits, sensors, displays, inputs, and the like. An integrated circuit can take the form of a chip, chipset or module, some of which can be surface mounted to a printed circuit board or PCB, or other support structure. For example, the main logic board (MLB) may have integrated circuits mounted thereon that may include at least a microprocessor, semiconductor memory (such as FLASH), and various support circuits. Examples of structural components include frames, walls, fasteners, reinforcements, motion mechanisms (hinges), and the like. Depending on their desired configuration, the components can be external (ie, exposed to the surface) and / or internal (eg, embedded within the housing).

  The housing 12 can include an opening 14 for placing internal components, and can be sized to accommodate a display assembly for presenting visual content, if desired, Is covered and protected by a protective cover layer 16. In some cases, the display assembly can be touch sensitive, allowing tactile input that can be used to provide control signals to the electronic device 10. In some cases, the display assembly may be a large and prominent display area that covers the majority of the mounting area of the front surface of the electronic device.

  The electronic device 10 can include an attachment feature corresponding to the attachment feature of the accessory device, such as a protective cover. In this way, the protective cover and the electronic device 10 can be detachably connected to each other. When attached to each other, the protective cover and the electronic device 10 can operate as a single operating unit. On the other hand, in the removed mode, the protective cover and the electronic device 10 can operate separately and, if desired, can operate as two separate parts. The attachment between the protective cover and the electronic device 10 can vary greatly. For example, the protective cover and electronic device 10 generally does not include externally visible attachment features (eg, snaps, latches, etc.) that adversely affect the look and feel or decorative appearance, and the outside of the protective cover or electronic device 10. Mounting features that are not visible to the surface and thus do not affect the look and feel or decorative appearance of the electronic device 10. As an example, the attachment feature can be provided by a protective cover or an attractive surface that does not interfere with the outer surface of the electronic device 10. In one embodiment, at least a portion of the attachment feature utilizes a magnetic force to provide some or all of the attachment force.

  Accordingly, the electronic device 10 can include a magnetic attachment system 18 and a magnetic attachment system 20. The magnetic attachment system 18 can be side mounted to the housing 12 and can be used to magnetically attach the electronic device 10 to a suitably configured accessory such as a protective cover. On the other hand, the magnetic attachment system 20 can be positioned below the cover glass 16 in the opening 14 and can include one or more of the magnetic elements 22. In one embodiment, the magnetic element 22 can be composed of a magnetic array (such as a Halbach array) to enhance the magnetic field presented to the corresponding magnetically compatible element in the protective cover. The magnetic mounting system 20 can be placed at various locations within the opening 14. For example, the magnetic attachment system 20 can be positioned proximate to the side walls 12c and 12d. In this way, the lateral movement (called racking) of the protective cover in a state where it is attached to the electronic device 10 can be substantially reduced.

  It should be noted that the magnetic element 22 can affect a magnetic sensing circuit, such as a Hall effect sensor 24 and a magnetometer circuit 26 in the form of an on-board compass 26. Thus, in some cases, magnetic field shaping elements can be used to reduce the magnetic effects experienced by such circuits. For example, a magnetic field shaping magnet can be used to control the shape and range of the magnetic field generated by the magnetic element 22. In some cases, the shape and arrangement of the magnetic element 22 can help prevent leakage flux that can potentially affect the sensing magnetic circuit. For example, for example, the magnetic element 22 can have a suitable trapezoidal shape (or other suitable geometric shape) to reduce the amount of leakage flux that can affect the on-board compass 26.

  2A and 2B show the electronic device 10 presented in terms of a specific embodiment in the form of a tablet device 100, each in a top perspective view, in connection with an accessory device presented as a protective cover 200. Yes. In particular, FIGS. 2A and 2B show two perspective views of the tablet device 100 and the protective cover 200 in an open configuration. For example, FIG. 2A shows a magnetic surface provided by a magnetic mounting system 104 disposed in the housing 102. FIG. 2B, on the other hand, is a rotation of the view presented in FIG. 2A by approximately 180 ° to provide a second view of the attachment feature 204 and its relationship with the protective cover 200.

  Referring now to FIG. 2A, the tablet device 100 can include a housing 102 that can encapsulate and support a magnetic attachment system 104. Tablet device 100 may take the form of a particular member of a family of tablet computing devices such as iPad® manufactured by Apple Inc., located in Cupertino, California. In order not to interfere with the magnetic field generated by the magnetic mounting system 104, at least the portion of the housing 102 closest to the magnetic mounting system 104 is any number of non-magnetic materials such as plastic or non-magnetic metal such as aluminum. Can be formed. The magnetic mounting system 104 can be configured to provide a variable magnetic surface for the housing 102. The variable magnetic surface may depend on the mounting state of the magnetic mounting system 104. For example, the magnetic strength value of the first magnetic surface may be less than a first threshold and is therefore not suitable for creating a magnetic circuit capable of forming a suitable attachment, It may not be suitable for adversely affecting nearby magnetic sensing devices. Thus, the first magnetic surface can be associated with the magnetic attachment system 104 being inactive.

  In some embodiments, the magnetic attachment system 104 is suitable for forming and maintaining a magnetic attachment from the first magnetic surface to a second magnetic surface that is active and thus active. It can have a movable magnetic element that can. In one embodiment, the movable magnetic element can be held away from the housing 102 in the inactive state and can be pushed toward the housing 102 in the active state. Thereby, respectively, the first magnetic surface transitions to the second magnetic surface, which coincides with the transition of the magnetic mounting system 104 from inactive to active.

  In one embodiment, a detector disposed within the housing 102 can determine whether the magnetic mounting system 104 is active or inactive. For example, if the magnetic mounting system 104 includes a movable magnetic element, a linear Hall effect sensor can be used to estimate the state of the magnetic mounting system 104 by providing a magnetic field strength value and any change in it. Information can be provided. If those magnetic mounting systems have moveable magnetic elements, the data provided by the linear Hall effect sensor can indicate the relative position of the moveable magnetic elements and thus whether movement has occurred. Also, movement of the movable magnetic element can be detected using a more direct approach, such as a tact switch that can directly detect movement of the movable magnetic element in the magnetic mounting system 104. . A detector (such as a magnetometer such as compass 26) that is offset from the magnetic mounting system 104 can detect changes in the local magnetic environment that can be correlated with the state of the magnetic mounting system 104. For example, if the compass 26 experiences a magnetic offset that matches that the magnetic attachment system 104 is active (eg, the magnetic offset is greater than a threshold), the magnetic attachment system 104 is active and the tablet device 100 And the protective cover 200 can be presumed to be magnetically attached to each other. Using this information in addition to the sensor information, it can be assumed that the protective cover 200 is in a partially open configuration with respect to the tablet device 100 when attached.

  The housing 102 may also encapsulate and support various structural components and electrical components (including integrated circuit chips and other circuitry) to provide computing operations for the tablet device 100. it can. The housing 102 can include an opening 106 for placing internal components and is sized to accommodate a display assembly or system suitable for providing at least visual content to a user, eg, via a display. Can be set. In some cases, the display assembly can include a touch sensing feature that provides a user with the ability to provide tactile input to the tablet device 100 using touch input. The display assembly can be formed of multiple layers including a top layer in the form of a transparent cover glass 108 formed of polycarbonate or other suitable plastic or high polish glass. The cover glass 108 can substantially close the opening 106 using highly polished glass.

  Although not shown, the display assembly under the cover glass 108 may be used to display images using any suitable display technology such as LCD, LED, OLED, electronic or e-ink, etc. Can do. The display assembly can be placed and secured within the cavity using a variety of mechanisms. In one embodiment, the display assembly is snapped into the cavity. The display assembly can be placed flush with adjacent portions of the housing. In this way, the display provides visual content that may include video, still images, as well as information (eg, text, objects, graphics) to the user and a graphical user interface that can receive input provided by the user ( An icon such as (GUI) can be presented. In some cases, the displayed icon may be moved by the user to a more convenient location on the display.

  The tablet device 100 can include a camera assembly 110 arranged to capture one or more images. The tablet device 100 can also include an ambient light sensor 112 (ALS) that is used to detect the level of ambient light associated with the camera assembly 110. In one embodiment, ALS 112 may be used to set the brightness level of the display assembly. For example, in a darker environment with little ambient light, the ALS 112 reading can cause the processor in the tablet device 100 to dim the display assembly. In a brighter environment, the display assembly can be brighter. The tablet device can further include a compass 114 that is used to detect an external magnetic field that can be useful in determining the geographic location of the tablet device 100. In addition, a magnetic sensing circuit (such as compass 114) can be used to determine the state of the magnetic mounting system 104 by detecting changes in the local magnetic environment. This change can be expressed as a magnetic offset.

  The tablet device 100 can also include a Hall Effect (HFX) sensor 116 that can be used to detect various characteristics of the corresponding magnetic element. In some embodiments, the tablet device 100 can include two or more HFX sensors and / or multiple HFX sensors of different types. For example, the tablet device 100 can include an HFX sensor that detects whether the cover 200 is in an open configuration or a closed configuration. The tablet device 100 can also include a linear HFX sensor that detects angular displacement of the magnetic elements in the flap 202. In this way, aspects of the tablet device 100 / cover 200 can be determined using various magnetic properties such as magnetic field strength (static and dynamic), magnetic field polarity, and angular position of the magnet relative to the sensor. . Determining any dynamic changes in the position and orientation of the tablet device 100 in real time using other types of sensors that may include inertial sensors such as accelerometers or gyroscopes (neither shown) Can do.

  The protective cover 200 can include a flap 202. In one embodiment, the flap 202 can have a size and shape depending on the cover glass 108. The flap 202 can be pivotally connected to the hinge assembly 204 shown in FIG. 2B. In this way, the flap 202 can rotate about the pivot line 206. The hinge assembly 204 can include a magnetic attachment feature 208. The magnetic attachment force between the magnetic attachment feature 208 and the magnetic attachment system 104 can maintain the protective cover 200 and tablet device 100 in the proper orientation and orientation with respect to the flap 202 and cover glass 108. Proper orientation simply means that the protective cover 200 is properly attached to the tablet device 100 and the flap 202 and the cover glass 108 can be aligned in mating engagement. The mating configuration between the cover glass 108 and the flap 202 means that when the flap 202 is placed in contact with the cover glass 108 as shown in FIG. It is something to cover. In this way, the flap 202 can be used as a protective cover that protects the surface of the electronic device 100. The flap 202 can be formed of various materials such as plastic, cloth and the like. Since the protective cover 200 can be easily attached directly to the housing 102 without fasteners, the flap 202 can basically conform to the shape of the tablet device 100. In this way, the cover 200 does not impair or even obscure the look and feel of the tablet device 100. The flap 202 may actually be single, or the flap 202 may be segmented so that the flap segment can be lifted to expose a corresponding portion of the display. The number and size of segments can vary widely. The flap 202 can also include functional elements that can cooperate with corresponding functional elements in the electronic device 100. In this way, for example, manipulation of the flap 202 by lifting the flap 202 (or its foldable segment) away from (or toward) the corresponding sensor causes the operation of the tablet device 100 to change. be able to.

  The flap 202 can include a magnetic material. For example, the magnetic element 210 can be used to magnetically attach to the corresponding magnetic attachment system 20 while the magnetic element 212 is holed when the flap 202 is in place above the cover glass 108. It may be detectable by the effect sensor 116. In this way, the Hall effect sensor 116 can respond by generating a signal that can be interpreted as information that can be used by the processor. The information can be used as cover position information by the processor, for example, to determine the relative spatial position of the flap 202 and the tablet device 100. The relative spatial position can be used to change the operating state of the tablet device 100. Using the Hall effect sensor 116 (in the form of a linear Hall effect sensor), any dynamic change in the detected magnetic field indicative of the movement of the magnet and the tablet device 100 such as the angular displacement of the magnetic element 212 relative to the Hall effect sensor 116. Can be determined. In some embodiments, the flap 202 can include two or more magnetic elements 212 arranged to be detectable by corresponding HFX sensors 116 disposed in the tablet device 100. In this way, information about the folding of the segmented version of the cover 200 can be communicated to the tablet device 100, which can be used by the tablet device 100. For example, information on the spatial relationship between the cover 200 and the tablet device 100 can be estimated by shifting the corresponding positions of the HFX sensor 116 and the magnetic element 212.

  The cover 200 can include other magnets in the form of a magnetic array 214. Also, the magnetic array 214 can be configured to communicate information to the tablet device 100, for example, when the tablet device 100 includes multiple HFX sensors that can detect the magnetic array 214. In this way, information in the form of magnetic codes can be provided to the tablet device 100. For example, if the magnetic array 214 includes four magnets, the four corresponding HFX sensors 116 can correlate information with the presence or absence of a particular magnet in the magnetic array 214. In this way, a properly configured magnetic array pattern can represent information such as the color or style of the protective cover 200.

  In addition to the magnet, the flap 202 can take the form of a capacitive element 216 that can be detected by a multi-touch (MT) sensing layer incorporated into the display assembly when the flap 202 is placed on the cover glass 108. Other types of passive elements 216 that can be included can be included. In this way, the MT sensing layer can respond to the presence of the capacitive element 216 by generating a touch pattern that matches the defined pattern. The definition pattern can be used to communicate information to the tablet device 100. The information can include aspects and features of the protective cover 200 such as color, type, style, serial number, and the like. In addition to passive elements, the flap 202 can include an active element 218 such as an RFID device 218 that can be used to identify the protective cover 200. Specifically, when the protective cover 200 is in a closed configuration, the flap 202 can contact the cover glass 108 so that the RFID sensor in the tablet device 100 can “read” the RFID device 218. become. In this way, information regarding the cover 200 such as the serial number, style, manufacturing date and manufacturing location, and identification information of the authentication code of the protective cover 200 can be extracted.

  The protective cover 200 may also include features that may be detectable by an optical sensor such as an ALS or camera assembly. For example, the micro cover 220 can be formed in the protective cover 200 that can allow a selected amount of light to penetrate the protective cover 200 in the vicinity of the ALS 112 or camera assembly 110. The microperforations 220 can be arranged in a pattern that can convey information to the tablet 100. For example, the micro-perforations 220 can be configured with a barcode array that can provide information in the form of a particular optical signal.

  3A and 3B show the protective cover 200 and the tablet device 100 magnetically attached to each other, the attachment between the flap 200 and the tablet device 100 can be in any form. is there. For example, the protective cover 200 can be formed of a sleeve portion that is pivotally coupled to the flap 202. In this way, the tablet device 100 can be inserted into the sleeve portion and the flap 202 can then be pivoted into the open and closed configurations without the need for magnetic attachment. However, for the remainder of this discussion, it is assumed that the protective cover 200 and the tablet device 100 are magnetically attached to each other without loss of generality.

  FIG. 3A shows a magnetic mounting embodiment in which the protective cover 200 is in a closed configuration so that the cover glass 108 is completely covered by and in contact with the flap 202. The protective cover 200 can pivot about the hinge assembly 206 from the closed configuration of FIG. 3A to the open configuration of FIG. 3B. In the closed configuration, the inner layer of the flap 202 can be in direct contact with the cover glass 108. In this way, the passive element 208 can be detected by a corresponding detection circuit disposed in the tablet device 100. For example, if the passive element 208 includes a capacitive element, a multi-touch (MT) circuit disposed in the display assembly under the cover glass 108 can detect and “read” the capacitive element 216. In this way, information about the protective cover 200 can be transmitted using the capacitive element 216. For example, information encoded with the pattern of capacitive element 216 can be detected by an MT circuit and the information sent to the processor. The processor can then read the pattern of the capacitive element 216 as a signature that can be used to identify various features of the protective cover 200. The pattern can vary widely. The first pattern can maximize the difference in capacitive signal between any two adjacent capacitive elements in order to maximize the signal-to-noise ratio and thereby improve the readability of the MT circuit. it can.

  For example, the capacitive element 216 can take the form of a metal strip that is diagonally disposed relative to a Cartesian detection grid disposed under the cover glass 108. In this way, the information pattern is passively communicated to the processor in the tablet device 100 using the correlation pattern of the metal strip by associating a specific information element (such as binary “1”) with a specific orientation. can do. However, the need to maximize the differential signal between adjacent capacitive elements is not only by changing the orientation, but also by changing the size, shape, material, etc. (by varying the electrical characteristics of various capacitive elements) Note that it can be achieved.

  FIG. 4 shows a top view of a particular embodiment of a protective cover 200 in the form of a segmented cover assembly 400. Note that the number of segments can vary widely. For example, as shown in FIG. 4, the number of segments is four. However, in other embodiments, the number of segments can be three (eg, as shown in FIG. 5), and in other embodiments (such as in FIG. 2), the number of segments can be one. (Ie, it can be a single flap).

  Cover assembly 400 may include a body 402. The main body 402 can have a size and shape corresponding to the cover glass 108 of the tablet device 100. The body 402 can be formed of a single foldable or flexible material. Further, the main body 402 can be divided into segments separated from each other by folding regions. In this way, the segments can be folded relative to each other in the folding region. In one embodiment, the body 402 can be formed of layers of material attached to one another while forming a laminate structure. Each layer may take the form of a single material that may have a size and shape compatible with the body 402. Each layer can also have a size and shape corresponding to only a portion of the body 402.

  In certain embodiments, the segmented body 402 can be divided into a plurality of segments 404-410 sandwiched between thinner and foldable portions 412. Each of the segments 404-410 can include one or more inserts (not shown) disposed therein, wherein the inserts are formed of a rigid or semi-rigid material that adds elasticity to the body 402. can do. Examples of materials that can be used include plastics, glass fibers, carbon fiber composites, metals and the like. The segment 404 can accommodate a magnetic mounting system 414. The magnetic attachment system 414 can include magnets 416, some of which can interact with the magnets in the tablet device 100, and more particularly with the magnets 22 in the attachment feature 20. The magnet 416 can magnetically interact with the magnet 22 to secure the cover 400 to the tablet device 100. However, a triangular support structure can also be formed by using a magnet 416 to form a magnetic circuit using a magnetically attractable element 418. In one embodiment, the magnets 22 can be arranged in a magnetic array according to a Halbach array to enhance the magnetic field by the magnets 416. The improved unilateral nature of the magnetic field provided by the Halbach array is very suitable for enhancing the magnetic force. For example, magnets 416 arranged as a Halbach array can pass substantially more magnetic flux through magnetic element 418 and essentially no magnetic flux passes through the outer surface of cover 400. In this way, the magnetic attraction between the magnet 416 and the magnetically attractable element 418 can be increased in a balanced manner while eliminating any effects associated with magnetism outside the cover 400.

The cover 400 can also include a magnetic element 210 that is magnetically attached to the corresponding magnetic attachment system 20 to reduce racking of the cover 400 when attached to the tablet device 100. Can be used. The cover 400 can also include a magnetic element 212 that can be used to activate the Hall effect sensor 116 when the flap 402 is in place over the cover glass 108. The cover 400 may include a passive element or an active element that supplements a sensor disposed in the tablet 100. For example, the cover 400 can include a magnetic array 214 that can be configured to communicate information to the tablet device 100 when the tablet device 100 includes, for example, a plurality of HFX sensors that can detect the magnetic array 214. . In this way, information in the form of magnetic codes can be provided to the tablet device 100.
The cover 400 can also include a passive element 216 (such as the capacitive element 216) that can be read by a capacitive multi-touch circuit disposed within the tablet 100. The cover 400 can also include active elements such as RFID-based elements 218. Further, the cover 400 can be configured to include an optical transmission feature that can provide an optical signal to the camera assembly 110 or ALS 112. The light transmission features can include patterned micro-perforations that pass light in a pattern that can be read by the camera assembly 110 or ALS 112.

  FIG. 5 shows a plan view of another embodiment of a protective cover 200 in the form of a cover assembly 500. Cover assembly 500 may include a body 502. In the embodiment shown in FIG. 5, the segmented body 502 can be divided into three segments, namely segments 504, 506, and 508, each segment being separated by a thinner and foldable portion 510. It is connected to an adjacent segment. Each of the segments 504-508 can include one or more inserts disposed therein, and the inserts can be used to provide structural support to the segmented body 502. That is, the insert can provide rigidity to the cover assembly. In some cases, the insert may be referred to as a reinforcement. Accordingly, the cover assembly 500 is relatively stiff except along the foldable area, the foldable area is thinner and does not include inserts, making the segmented cover assembly 500 more robust and easier to handle (eg, Can be folded). In one embodiment, segments 504, 506, and 508 can have a size relationship with respect to each other such that segments 504-508 can be used to form a triangular support structure.

  In one embodiment, the segmented body 502 can include a plurality of magnets, some of which can be used to form a triangular structure. For example, the segment 504 can include a first edge mounting magnet 512 that is linearly arranged along the first edge 514 of the segmented body 502, and the segment 508 includes a first edge A second edge mounting magnet 516 arranged linearly along a second edge 518 opposite the edge 514 may be included. In this embodiment, the first edge mounting magnet 512 and the second edge mounting magnet 516 are each of the first edge mounting magnet 512 out of the second edge mounting magnet 516. Have a one-to-one correspondence that can be associated with a corresponding one of For example, the first edge mounting magnet 512-1 can have a polarity P1 that can be associated with a second edge mounting magnet 516-1 having a polarity P2, and the first edge mounting magnet 516-1. 512-1 and the second end mounting magnet 516-1 are approximately the same size and magnetic strength. In this way, a triangular structure can be formed using a magnetic edge attach technique, thus requiring a separate magnetically attractable element (such as a magnetically attractable element 418). It can be formed without. The magnetic edge attach technique relies on a first edge mounting magnet and a second edge mounting magnet when approaching each other (not necessarily overlapping) to form a magnetic circuit. . The magnetic circuit can provide a suitable magnetic attraction to maintain the triangular structure in a proper configuration.

The cover 500 can also include a magnetic element 210 that is magnetically attached to the corresponding magnetic attachment system 20 to reduce the racking of the cover 500 when attached to the tablet device 100. Can be used for. The cover 500 can also include a magnetic element 212 that can be used to activate the Hall effect sensor 116 when the body 502 is in place above the cover glass 108. Cover 500 can include a magnetic array 214 that can be configured to communicate information to tablet device 100 using, for example, a plurality of HFX sensors that can detect magnetic array 214.
The cover 500 may include other passive elements such as a capacitive element 216 that can be read by a capacitive multi-touch circuit disposed within the tablet 100. The cover 500 can also include active elements, such as RFID-based elements 218, and can provide optical signals to the camera assembly 110 or ALS 112 (patterned as in the case of the cover 400). The cover 500 can be configured to include light transmission features (such as micro-perforations).

  6A and 6B show a partially open configuration segmented cover 400 for the tablet device 100 and FIG. 6C correspondingly shows a similar partially open configuration segmented cover 500. It should also be noted that the cover 400 and the cover 500 are both foldable and have a plurality of segments, so that the following description regarding the cover 400 can be applied to the cover 500. Partially open configuration means that only a portion of the protective layer 108 can be exposed at a time due to the segmented nature of the segmented cover 400 (or cover 500). However, in order for the tablet device 100 to operate in a suitable manner that matches the folded configuration of the cover 400, the processor in the tablet device 100 accurately determines the spatial relationship between the cover 400 and the tablet device 100 in real time. It must be possible to do.

  For example, as shown in FIG. 6A, in a situation where the HFX sensor 116 cannot detect the magnetic field from the magnet 416, the three spatial relationships between the cover 400 and the tablet device 100 match that scenario. . In the possible state (1), the cover 400 and the tablet device 100 are not magnetically attached to each other, and in the possible state (2), the cover 400 is magnetically attached to the tablet device 100. In state (3), which is attached but fully open or possible, cover 400 is attached to tablet 100 and is in at least a first partially open state or a first peak mode state. Therefore, other sensors and their associated data can be used to solve this problem. For example, whether the magnetic offset recognized by the magnetic compass 114 matches the expected magnetic offset when the magnetic mounting system 104 is active in order to determine a possible state (1). Judgment can be made. This magnetic offset may be due to the presence of magnets in the tablet device 100 as well as magnets in the magnetic attachment system 204. If the magnetic offset matches the unattached state (ie, the baseline magnetic offset), the situation can be determined to be the configuration state (1), ie, the state with no magnetic connection, and the processor The tablet device 100 can be operated accordingly (the display assembly is fully viewable and the visual content can be fully presented over its entire display area). Also, other sensors can be used to assist in determining the connection state of the tablet device 100. Other sensors are HFX sensors disposed proximate to the magnetic mounting system 104, as well as movable magnets in the magnetic mounting system that rely on moving the magnet to transition from the inactive state to the active state. Sensors (such as linear Hall effect sensors, tact switches, etc.) that can determine that the element is moving can be included.

  However, if it is determined that the tablet device 100 and the cover 400 are magnetically attached to each other, there may still be either state (2) or state (3). To solve this situation, additional sensors and associated data can be used. For example, if ALS 112 or camera assembly 110 is unable to detect at least a minimum amount of light, segment 406 (or segment 506 in cover 500) is blocking the light, and thus cover glass 108 in place. It can be excluded to remain overlapped with the corresponding part of. Thus, the processor can deduce that in a mode called the first peak mode, only the segment 404 is lifted, exposing the corresponding portion 602 of the cover glass 108. Other sensors that may be used include additional Hall effect sensors that can detect corresponding magnets in segments 404-410 disposed along either edge 12b or 12c of housing 12. obtain. If the processor determines that the cover 400 is in the first peak mode folded configuration, the processor may instruct the tablet 100 to present visual content only in the portion 602 of the display assembly.

  On the other hand, if the ALS or camera assembly 110 can detect at least a minimum amount of light, then another sensor may be used to either fully open the cover 400 or in a deployed peak mode (shown in FIG. 6B). You can decide if there is. For example, if the HFX sensor disposed in the tablet device 100 can detect the corresponding magnet in the segment 408, the processor is in a position where the segment 408 is on the corresponding portion of the cover glass 108. , It can be estimated that the cover 400 is in the folded state in the unfolded peak mode according to FIG. 6B. On the other hand, if the HFX sensor does not detect that magnet (or does not detect any magnets in segment 410), the processor assumes that the cover 400 is in a fully open configuration and presents the visual content accordingly. The device 100 can be instructed.

  In addition to the magnet, the pattern of capacitive elements in the segments (such as segments 406, 408, 410) that remain in contact with the cover glass 108 is detected and used by the processor to fold the cover 400 Can be solved. The detection of capacitive elements in segment 406 clearly indicates that segment 406 is in contact with cover glass 108. However, because the HFX sensor 116 is no longer detecting the magnetic field due to the magnetic element 416, the processor in the tablet device 100 will only have the segment 404 while all other segments remain in contact with the cover glass 108. It can be assumed that the cover 400 is lifted and in the first peak mode configuration.

  The processor can use this information to change the operating state of the tablet device 100 according to the folded state of the cover 400. For example, the processor can display information such as battery level, time of day, email, etc. only in that portion 602. Information detected in segment 406 can also be used by tablet device 100 to present specific visual content on a portion of a display assembly that presents visual content in viewable portion 602. For example, the tablet device 100 displays visual information suitable only for presentation by the viewable portion 602 in a manner according to available presentation resources. For example, visual elements (such as icons, graphical user input and video) can be processed in a manner according to the size and number of pixels available for presentation. The visual elements can include information icons regarding received emails, weather conditions, and the like. In one embodiment, visual presentation resources such as the number of pixels available to present a video or still image can be consistent throughout the cover 400 or cover 500. For example, to provide a consistent user experience, the size of segment 404 and segment 504 can make the same number of pixels available as presentation resources in the first peak mode. In this way, the tablet device 100 does not need to grasp a specific configuration (tri-fold or quadruple) in order to present visual content in the first peak mode.

  FIG. 6B shows another partially open situation in which, in addition to segment 404, segment 406 is also lifted. In one embodiment, capacitive element 216 in segment 406 is no longer detected, but only segments 404 and 406 can be confirmed when it is determined that capacitive element 216 in segment 408 can be detected. Determined. In this way, additional display resources can be enabled to provide an improved display experience. In addition to using capacitive elements, other sensors can be utilized. For example, ALS 112 and camera assembly 110 may be used separately or in combination, based on the amount of ambient light detected (in the case of ALS 116), and / or for periodic image capture events by camera assembly 112. Based on this, it can be determined that the segment 408 has been lifted. As discussed above, the magnetometer can be used to determine the attachment state of the magnetic attachment system 104 (active or inactive). In this way, the processor can use this information to distinguish between the peak mode and the deployed peak mode. In yet another embodiment, the element 604 can be placed at a selected location corresponding to the detection node in the tablet device 100 on the periphery of the segmented cover 400. In this way, the ability to detect element 604 by the detection node can further indicate the state of segmented cover 400 relative to tablet device 100.

  As shown in FIG. 6C, in the first peak mode, the tablet device 100 may present visual content in the form of icons 620 as discussed above. Thus, information in the form of visual content such as time, notes, etc. can be presented for viewing only on the viewable portion of the display. When the sensor detects that the segment 506 has been returned to the glass layer 108, the tablet 100 can return to a previous operating state, such as a sleep state. Further, in another embodiment, when an icon arranged to respond to a touch is displayed, a portion of the touch sensitive layer corresponding to the visible portion of the display can also be activated. As described above, the amount of visual presentation resources (such as pixels) may be the same for both tablet device 100 when used with cover 400 or cover 500. In other words, the sizes of segments 404 and 504 are such that the amount of visual presentation resources corresponding to portions 602 and 622 is approximately the same.

  FIG. 7A shows the tablet device 100 operating in a first peak mode in which a selected icon 702 or other visual element can be displayed only on the viewable portion 704 of the display 16 of the tablet device 100. Icon 702 may simply be a display type icon, or in some cases, some or all of icon 702 may be user interactive. For example, icon 702-1 may display a clock that indicates the current time, and icon 702-2 may be a graphical user interface used to modify the operation of media player functions performed by tablet device 100. Can be represented. Other icons may include icons 702-3 representing current weather conditions, icons 702-4 representing stock market results, and the like. On the other hand, FIG. 7B illustrates a second peak mode in which additional functions can be enabled when it is determined that more than a predetermined amount of display 16 is viewable. In this mode, additional information available on the portion of the protective cover 700 that is in contact with the display 16 can cause the tablet device 100 to change its operating state along the disclosed lines. For example, in advanced peak mode, an additional display area that is viewable can be used to present video 704 (with user interface 702-2 or equivalent overlap), text data 706, and the like.

  Note that the icons and icon behavior can be modified depending on the amount of display that can be viewed. For example, a notification icon can be presented indicating that the tablet device is operating in peak mode or related mode. Furthermore, the characteristics of icons in the form of a graphical user interface, i.e., GUI, can be related to the amount of display that is viewable, for example. For example, in the first peak mode, the size of the GUI can be increased or decreased according to the amount of display that can be viewed. In addition, other characteristics such as number of pixels, pixel density, placement in the visual field, etc. may be related to peak mode as well as peak mode speed. Peak mode speed means the time it takes for the tablet device to change its operating state to the corresponding peak mode state. In one example, when a portion of the cover is lifted, the visual content presented on the display is lifted from the first peak mode (if it can be lifted continuously) to the second peak mode, The cover can be tracked throughout the continuous movement of the cover until it is fully opened.

  FIG. 8 illustrates a system 800 that includes a protective cover 400 pivotally coupled to the tablet device 100 according to the described embodiments. In this embodiment, the at least one segment 404-410 can include passive elements 216 that can take the form of capacitive elements arranged in various patterns. Each pattern can encode information in the form of data. For example, an alternating diagonal array of capacitive elements can maximize the signal-to-noise ratio when detectable by an MT circuit in the tablet device 100. In this way, the capacitive element 802 can actually be conductive, and segments 404 in an alternating diagonal pattern with respect to the detection nodes in the tablet device 100 to maximize detection reliability. Can take the form of a metal strip (eg, formed of aluminum) incorporated in For example, at least some of the diagonal metal strips 802 can be arranged at about 45 ° with respect to the capacitive detection grid disposed in the tablet device 100. Capacitive elements can vary from one segment to another, and can vary from within each segment. In this way, information can be encoded in any number of different ways by using capacitive elements of various configurations.

  FIG. 9 shows a system 900, which is a more generalized version of system 800, in which various information elements are shown. For example, the cover 400 can include a magnetic array 902 arranged in a fixed pattern, and the magnetic array 902 can be detected by a magnetic sensor 904 disposed in the tablet device 100. The magnetic array 902 can encode information that can be used to identify various aspects of the cover 400. For example, if the magnetic sensor 904 can determine the magnetic field due to each member of the magnetic array 902, at least four units of information can be encoded. For example, if the magnetic array 902 includes three magnets at a first position, a second position, and a fourth position, detection of the magnet by a corresponding one of the magnetic sensors 904 (such as “1”) ) Can be determined as an information unit. In this example, the magnetic sensor 904 causes the magnetic array 902 having magnets in the first position, the second position, and the fourth position to be in four information states related to the cover 400 (such as color, style, etc.). Can be determined as data words {1, 1, 0, 1} that can be used to identify. In some cases, additional information states can be encoded if the magnetic sensor 904 can determine the respective magnetic polarity of the magnetic array 902. In still other embodiments, the information can be encoded using the relative magnetic field strengths of the constituent magnets in the magnetic array 902.

  Position information can be provided by arranging elements (such as magnets 906) to be detectable by corresponding sensors 908 disposed in the tablet device 100. For example, if the magnet 906 is placed in one or more of the segments 404-410, the magnetic sensor disposed in the tablet device 100 when that segment incorporating the magnet overlaps the cover glass 108. 908 can detect a corresponding one of the magnets 906. In this way, the tablet device 100 can use this information to determine the spatial relationship between the cover 400 and the tablet device 100. For example, when the Hall effect sensor 908-1 does not detect the magnet 906-1 and the Hall effect sensor 908-2 detects the magnet 906-2, the tablet device 100 has the cover 400 and only the segment 404 has the cover glass 108. It can be assumed that the first partially open configuration is folded away from the first. Similarly, sensor 908-3 cannot detect magnet 906-3, but an attachment sensor (such as sensor 910) confirms that tablet 100 and cover 400 are attached to each other. It can be inferred that the tablet device 900 is in an unfolded configuration in which the cover 400 is folded such that the segments 404, 406 and 408 are separated from the tablet 100. In this configuration, the tablet device 100 operates in an expanded peak mode by presenting visual content to the viewable portion of the display assembly (the portion of the display that the segments 404-408 overlap when the cover 400 is in the fully closed configuration). can do.

  In addition to detecting magnets in the cover 400, the magnetic sensor 910 can be used to detect the state of the magnetic mounting system. For example, if the tablet device 100 has a magnetic attachment system that uses movable magnetic elements, the magnetic sensor 910 can detect the current local magnetic environment. A processor in the tablet device 100 can determine whether the current local magnetic environment is consistent with the movable magnet being in an active state or inactive. If the current local magnetic environment is consistent with the magnetic attachment system being active, the tablet device estimates that the cover 400 is attached to the tablet 100 and operates according to the folded configuration of the cover 400. be able to.

  Additional resources may include optical resources 912. In one embodiment, the optical resource 912 can take the form of a micro-perforation pattern that can allow light to pass through the cover 400 to reach either or both of the camera assembly 110 and the ALS 112. . This pattern can take the form of a barcode 914 that can encode information related to the cover 400, for example. Still further, an active element such as an RFID tag 916 can be detected by a corresponding circuit 918 disposed in the tablet device 100.

  FIG. 10 shows a flowchart detailing a process 1000 according to the described embodiment. The process 1000, at 1002, from a first magnetic sensor (such as a Hall effect sensor), a magnet non-detection signal indicating that the magnetic sensor did not detect a magnetic field corresponding to a magnet disposed in the protective cover. Can be received by receiving at the tablet device. At this point, the tablet device must estimate whether the cover is attached and, if so, the folded configuration of the cover. At 1004, a magnet detection signal is received from the second HFX sensor indicating that the cover is attached. The tablet device determines at 1006 that the cover is in the first folded configuration using information provided by the combination of the first and second HFX sensors. The tablet device presents visual content at 1008 according to a first peak mode that matches the first folded configuration of the cover.

  FIG. 11 shows a flowchart detailing a process 1100 according to the described embodiments. Process 1100 may be performed at 1102 by receiving a signal from a magnetic sensor (such as a Hall effect sensor) indicating that a magnet disposed in the cover is not detected. At 1102, a processor in the tablet device is responsive to a signal received by activating an optical system disposed in the tablet device at 1104. The optical system can include an image capture device such as a camera or a photodetector device such as an ambient light sensor (ALS). At 1106, a determination is made as to whether light has been detected. If it is determined at 1106 that light has been detected and a magnet detection signal is received by the tablet device at 1108, the cover is in the second folded configuration at 1110 and the tablet device is in the second peak mode at 1112. Present visual information according to The second peak mode is an expanded peak mode where additional portions of the display are viewable and present visual content.

  Returning to 1106, if the optical system does not detect light, at 1114 the cover is in the first folded configuration and at 1116 the tablet device presents visual content according to the first peak mode. Note that, in addition to detecting light, other embodiments describe using an image of the underside of the cover that may be detectable by the optical system. In this way, the optical system can confirm that at least the corresponding part of the cover is in contact with the tablet device by capturing an image.

  FIG. 12 shows a flowchart detailing a process 1200 according to the described embodiment. Process 1200 may be performed at 1202 by receiving a magnet non-detection signal from a magnetic sensor by a tablet device. At 1204, a processor in the tablet device responds to receipt of an undetected signal by evaluating a local magnetic environment. In one embodiment, at 1206, the local magnetic environment can be assessed by determining a magnetic offset value using a magnetometer. If at 1206 it is determined that the magnetic offset value does not match that the cover is magnetically attached to the tablet device, at 1208 the cover is not magnetically attached to the tablet device and the process 1200. Ends. On the other hand, if the magnetic offset matches that the cover is magnetically attached to the tablet device, at 1210, a magnet detection signal is received, at 1212 the cover is in a first folded configuration, and at 1214, The tablet presents visual content according to the first peak mode.

  FIG. 13 shows a state peak mode state diagram 1300 according to the described embodiment. Although the peak mode state diagram shows three tablet device operating states (standard, first peak, second peak), in some embodiments, the number of operating states is the number of foldable segments. Can be related to For example, if n represents the number of segments that can be folded, n-1 peak modes may be available (assuming there are appropriate sensor resources for the tablet device). Turning to FIG. 13, when the tablet device determines that the foldable cover is in either an open configuration or a closed configuration, the tablet device can operate in a standard operating mode of 1302. In the open configuration (1304), the display assembly presents the current visual content without restriction. The closed configuration (706) stops the display assembly from presenting any visual content.

  If the tablet device is in standard mode (1302) and the first segment (denoted “S1”) is lifted, the tablet device determines that only the first segment is lifted, and the first 1 peak mode operating state (1308). In the first peak mode operating state, any visual content presented by the display assembly is limited to the portion of the display assembly that is determined to be viewable that matches that the first segment is lifted. . In the first peak mode, if the first segment is no longer lifted from the tablet device, the tablet device returns to the standard mode (1302), more specifically to the closed configuration. However, if it is determined that the tablet device is in the first peak mode (1308) and the first segment (“S2”) is being lifted by the tablet device, the tablet device is in the second peak mode (1310). ). In the second peak mode, visual content is presented only by the display assembly where it is determined to be viewable.

  If the tablet device determines that the first segment is not lifted, the tablet device transitions from the second peak mode to the first peak mode. Further, when the tablet device is in the second peak mode and the tablet device determines that both segments are not lifted, the tablet device has a foldable cover closed from the second peak mode. Direct transition to the standard mode that matches Conversely, the tablet device can transition directly from the standard mode that matches the closed configuration when both the first segment and the second segment are lifted simultaneously. Also, in the second peak mode, the tablet device can directly transition to a standard mode consistent with the foldable cover being in the open configuration when all remaining segments of the cover are lifted.

  Note that the application can be executed depending on the current operating state of the tablet device. For example, an application operating in the first peak mode can immediately transition to the second peak mode (and vice versa). For email applications, the standard mode can present a full version of the email message, and the second peak mode can present a small version (possibly only a predefined summary). In the first peak mode, only the subject can be presented. The user can provide a peak mode setting that can determine how the tablet device responds to the cover being positioned to match the peak mode.

  FIG. 14 shows a flowchart detailing a process 1400 according to the described embodiment. Process 1400 may be performed by performing at least the following operations with a tablet device associated with a foldable cover. In the described embodiment, the process 1400 may begin at 1402 by determining whether the foldable cover is closed with respect to the tablet device. “Closed” means that the protective cover covers the multi-touch (MT) detection grid disposed within the tablet device and is therefore proximate thereto. For example, when the tablet device includes a display, the display can include MT functionality depending on the MT detection grid. Furthermore, the determination as to whether the cover is closed can be determined in any suitable manner. For example, the optical sensor detects the presence or absence of a protective cover based on the amount of light detected, and estimates whether the foldable cover is closed or open based on the amount of light. can do.

  In either case, if it is determined that the foldable cover is closed, a determination is made at 1404 as to whether an information element pattern has been detected. In one embodiment, the information element can store information capacitively based on the size, orientation, shape, etc. of the information element and the MT detection grid. Thus, the pattern of information elements can be based on the correlation of each individual characteristic of the information element. For example, when the information element is an aluminum diagonal strip, the right slope can be associated with “1”, the left slope can be associated with “0”, and vice versa. If a pattern is detected, a determination is made at 1406 as to whether the pattern has been recognized. If the pattern is not recognized, the process 1400 ends, and if the pattern is recognized, at 1408, the recognized pattern is associated with foldable cover information. The foldable cover information can include, for example, color, style, date of manufacture, and location of manufacture. Then, at 1410, the foldable cover information can be stored in a data storage device in the tablet device for later reference. For example, if part of the foldable cover information includes a serial number, the serial number is periodically stored in a data storage device in the tablet device and can be updated there. Can be associated with If the serial number of the foldable cover does not match the authenticated serial number, it is presumed that the cover is not authenticated.

  FIG. 15 shows a flowchart detailing a process 1500 according to the described embodiment, wherein the process 1500 receives a magnet detection signal indicating that the cover is in a fully closed configuration at 1502 when the tablet device has a first magnetic field. Triggered when received from a sensor. More specifically, process 1500 begins at 1502 by receiving an indication from the HFX sensor that the cover is closed. At 1504, a multi-touch (MT) sensor disposed in the tablet device detects an MT event. An MT event can be the result of a capacitive element disposed with a cover. Capacitive elements can be arranged in a particular pattern that is used to encode information. At 1506, a determination is made as to whether information associated with the capacitive pattern corresponding to the MT event matches a signature stored on the tablet device. If it is determined that the MT signature matches the stored signature, at 1108, the tablet device authenticates the cover at 1110, and if it is determined that it does not match, at 1112 the tablet device Judge that it is not authenticated.

  FIG. 16 is a block diagram of an electronic device 1600 suitable for use with the described embodiments. The electronic device 1600 illustrates a typical computing device circuit. The electronic device 1600 includes a processor 1602 associated with a microprocessor or controller for controlling the overall operation of the electronic device 1600. Electronic device 1600 stores media data associated with the media item in file system 1604 and cache 1606. The file system 1604 is typically one storage disk or a plurality of disks. The file system 1604 typically provides a large capacity storage capability for the electronic device 1600. However, the electronic device 1600 may include a cache 1606 because access time to the file system 1604 is relatively slow. The cache 1606 is a random access memory (RAM) provided by a semiconductor memory, for example. The relative access time to the cache 1606 is substantially shorter than for the file system 1604. However, the cache 1606 does not have the large storage capacity of the file system 1604. Furthermore, the file system 1604 consumes more power than the cache 1606 when active. Power consumption is often a concern when the electronic device 1600 is a portable media device powered by a battery 1624. The electronic device 1600 may also include a RAM 1620 and a read only memory (ROM) 1622. ROM 1622 may store a program, utility, or process to be executed in a nonvolatile manner. RAM 1620 provides volatile data storage, such as for cache 1606.

  The electronic device 1600 also includes a user input device 1608 that allows a user of the electronic device 1600 to interact with the electronic device 1600. For example, user input device 1608 may take various forms such as buttons, keypads, dials, touch screens, audio input interfaces, visual / image capture input interfaces, inputs in the form of sensor data, and the like. Still further, electronic device 1600 includes a display 1610 (screen display) that can be controlled by processor 1602 to display information to a user. Data bus 1616 may facilitate data transfer between at least file system 1604, cache 1606, processor 1602, and CODEC 1613.

  In one embodiment, the electronic device 1600 is responsible for storing a plurality of media items (eg, songs, podcasts, etc.) within the file system 1604. If the user wants the electronic device to play a particular media item, a list of available media items is displayed on the display 1610. The user input device 1608 can then be used to select one of the available media items. When processor 1502 receives a selection of a particular media item, it provides media data (eg, an audio file) for that particular media item to a coder / decoder (CODEC) 1613. CODEC 1513 then generates an analog output signal for speaker 1614. The speaker 1614 can be a speaker inside the electronic device 1600 or outside the electronic device 1600. For example, headphones or earphones connected to the electronic device 1600 are considered external speakers.

  The electronic device 1500 also includes a network / bus interface 1611 that couples to the data link 1612. Data link 1612 allows electronic device 1500 to be coupled to a host computer or accessory device. The data link 1512 can be provided via a wired connection or a wireless connection. In the case of a wireless connection, the network / bus interface 1611 may include a wireless transceiver. A media item (media asset) may be associated with one or more different types of media content. In one embodiment, the media item is an audio track (eg, song, audio book, and podcast). In another embodiment, the media item is an image (eg, a photograph). However, in other embodiments, the media item can be any combination of audio content, graphical content, or visual content. Sensor 1626 may take the form of circuitry for detecting any number of stimuli. For example, the sensor 1526 may include a Hall effect sensor responsive to an external magnetic field, an audio sensor, an optical sensor such as a photometer, and the like.

  Various aspects, embodiments, implementations or features of the described embodiments can be used individually or in any combination. Various aspects of the described embodiments can be implemented by software, hardware, or a combination of hardware and software. Further, the described embodiments can be implemented as computer readable code on a non-transitory computer readable medium. A computer-readable medium is defined as any data storage device that can store data which can thereafter be read by a computer system. Examples of computer readable media include read only memory, random access memory, CD-ROM, DVD and optical data storage devices. The computer readable medium can also be distributed over a network coupled computer system so that the computer readable code is stored and executed in a distributed fashion.

  The foregoing description has provided a thorough understanding of the described embodiments by using specific terminology for the purposes of explanation. However, it will be apparent to one skilled in the art that these specific details are not essential for practicing the described embodiments. Therefore, the foregoing descriptions of specific embodiments described herein are presented for purposes of illustration and description. They are not intended to be exhaustive or to limit the embodiments to the precise forms disclosed. It will be apparent to those skilled in the art that many modifications and variations are possible in view of the above teachings.

  The advantages of the described embodiments are numerous. Various aspects, embodiments, or implementations may provide one or more of the following advantages. Many features and advantages of this embodiment will be apparent from the written description, and thus are intended to encompass such features and advantages of the invention by the appended claims. . Further, since numerous modifications and variations will readily occur to those skilled in the art, these embodiments should not be limited to the precise configuration and operation illustrated and described. Therefore, all suitable modifications and equivalents can be employed as included within the scope of the present invention.

Claims (13)

A foldable accessory device,
A foldable flap comprising a first edge and a second edge;
A connector assembly attached to the foldable flap at the first edge;
The connector assembly comprises:
At least a processor, a dedicated sensor used only to confirm that the attachment mechanism is removably attached to the host device, and a top protective layer configured to present visual content coupled to the processor An attachment mechanism for removably attaching the foldable accessory device to a host device having a housing configured to enclose and support the display, and pivoting the foldable flap and the attachment mechanism Hinges configured to be connectable, the processor only if the dedicated sensor confirms that the foldable flap and the host device are attached together 1) The foldable frame for the host device Determining the folded configuration of the wrap, and 2) allowing the host device to operate in response to the folded configuration, wherein the folded configuration of the folded flap exposed the viewable portion of the display Sometimes the foldable accessory device comprises a hinge that operates to present visual content in response to the viewable portion of the display. The first portion of the flap is disposed at a first location of the housing and configured to detect the first portion of the flap only when the first portion of the foldable flap is in contact with the top protective layer. A first sensor,
The second portion is disposed only when the second portion of the foldable flap that is disposed at the second location of the housing and is different from the first portion is in contact with the top protective layer. The foldable accessory device of claim 1, further comprising: a second sensor configured to detect.   The folding configuration includes folding the first portion of the foldable flap away from the top protective layer so as to expose the first viewable portion of the display; and The non-detectable by a first sensor and the second portion of the foldable flap in contact with the top protective layer and detectable by the second sensor. A foldable accessory device as described in 1.   4. The foldable of claim 3, wherein the processor operates the host device according to the first folding configuration using information based on the detection by both the first sensor and the second sensor. Accessory device.   The foldable accessory device of claim 4, wherein in the collapsed configuration, the processor causes the display to present visual content only to the first viewable portion of the display.   The foldable accessory device of claim 5, wherein the host device further comprises a memory device coupled to the processor and configured to store an application executable by the processor.   The foldable accessory device of claim 6, wherein the processor executes the application stored in the memory device in response to the folding configuration.   The host device further comprises a touch sensing layer configured to cooperate with the display and receive a touch event and send a corresponding touch signal to the processor for further processing. 8. The foldable accessory device according to claim 7.   9. The foldable accessory device of claim 8, wherein the touch sensitive layer operates in response to the fold configuration.   The foldable accessory device of claim 9, wherein the display presents a graphical user interface (GUI) to a viewable portion of the display according to the foldable configuration.   The foldable accessory device of claim 10, wherein a display resource used to present visual content by the display is proportional to the size of the viewable portion. The foldable accessory device of claim 10 , wherein a visual characteristic of the GUI in the viewable portion is related to a size of the viewable portion.   The foldable accessory device of claim 1, wherein the host device is a tablet computer.