Source: http://patents.com/us-9954571.html
Timestamp: 2018-12-14 19:21:12
Document Index: 52622821

Matched Legal Cases: ['Application No. 103125370', 'Application No. 103125370', 'Application No. 201310643456', 'Application No. 102128368', 'Application No. 201310643456', 'Application No. 2014307051', 'Application No. 2014307051', 'Application No. 201410356292', 'Application No. 14835745', 'Application No. 10', 'Application No. 61']

US Patent # 9,954,571. Cover for an electronic device - Patents.com
United States Patent 9,954,571
Sartee , et al. April 24, 2018
Sartee; Jared A. (Pemberton, CA), Smith; Samuel G. (Cupertino, CA), Balaji; Santhana K. (Cupertino, CA)
Family ID: 1000003255042
15/142,639
US 20160323006 A1 Nov 3, 2016
13612208 Sep 12, 2012 9326576
61681117 Aug 8, 2012
Current CPC Class: A45C 11/00 (20130101); G06F 1/16 (20130101); G06F 1/1637 (20130101); G06F 1/1675 (20130101); G06F 1/1677 (20130101); G06F 1/3265 (20130101); H01F 7/02 (20130101); H01F 41/00 (20130101); H04M 1/0206 (20130101); H04M 1/0266 (20130101); H05K 5/02 (20130101); H04B 1/3888 (20130101); Y02D 10/153 (20180101); Y10T 29/49826 (20150115); A45C 2011/003 (20130101); H01F 7/0252 (20130101); Y10T 24/32 (20150115)
Current International Class: H05K 5/00 (20060101); H05K 5/02 (20060101); H04B 1/3888 (20150101); H01F 7/02 (20060101); G06F 1/16 (20060101); H01F 41/00 (20060101); G06F 1/32 (20060101); H04M 1/02 (20060101); A45C 11/00 (20060101)
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This application is a continuation of U.S. patent application Ser. No. 13/612,208, filed Sep. 12, 2012, entitled "Cover for an Electronic Device," now U.S. Pat. No. 9,326,576 issued May 3, 2016, which claims priority under 35 U.S.C. 119(e) to U.S. Provisional Patent Application No. 61/681,117, filed Aug. 8, 2012, entitled "Consumer Electronic Product," the disclosure of each of which is incorporated herein by reference in its entirety for all purposes.
1. An electronic device, comprising: a housing with a full front opening and a back opposite the full front opening; a display carried by the housing arranged to present visual content; an outer protective layer overlaying the display that is disposed within the front opening and carried by the housing; and a sensor carried by the housing and coupled to a processor, the sensor configured to detect energy that is emitted by an element and that passes through the back of the housing, wherein in response to detecting the energy from the element that passes through the back of the housing, the sensor provides a signal including detection information indicating a spatial relationship between the sensor and the element that is used by the processor to operate the electronic device in a pre-defined manner based on the spatial relationship between the sensor and the element.
2. The electronic device as recited in claim 1, wherein the element is a magnet and the emitted energy is magnetic energy.
3. The electronic device as recited in claim 2, wherein the magnet is movable with respect to the electronic device.
4. The electronic device as recited in claim 2, wherein the sensor is a magnetic sensor configured to detect the magnetic energy that passes through back of the housing.
5. The electronic device as recited in claim 4, wherein the spatial relationship indicates a position of the movable magnet with respect to the electronic device.
6. The electronic device as recited in claim 1, wherein the electronic device further comprises a battery that provides power at least to the display.
7. The electronic device as recited in claim 1, wherein the pre-defined manner of operation comprises operating the electronic device to conserve power.
8. The electronic device as recited in claim 1, the electronic device further comprising an image capture device.
9. The electronic device as recited in claim 1, wherein the electronic device comprises a media player.
10. An electronic device, comprising: a housing including a front surface and a rear surface; a display carried by the housing arranged to present visual content; a processor; and a sensor carried by the housing and coupled to the processor, the sensor configured to detect a magnetic field produced by an element external to the housing, the magnetic field emanating from the rear surface of the housing, wherein the sensor is triggered by the magnetic field produced by the element when the magnetic field exceeds a minimum detection threshold, and wherein, when the sensor is triggered, the sensor provides a signal including detection information to the processor to alter operation of the electronic device in a pre-defined manner based on the detection information.
11. The electronic device of claim 10, wherein the magnetic field exceeds the minimum detection threshold when the element is moved toward to the sensor.
12. The electronic device of claim 10, wherein the element is carried by an accessory device separate from the electronic device.
13. The electronic device of claim 12, wherein the sensor is triggered when at least a portion of the accessory device is placed into contact with the rear surface of the housing of the electronic device.
14. The electronic device of claim 10, wherein the processor is configured to determine, from the detection information, a spatial relationship between the electronic device and the element such that the processor alters operation of the electronic device based on the determined spatial relationship.
Recent advances in portable computing includes the introduction of hand held electronic devices and computing platforms along the lines of the iPad.TM. tablet manufactured by Apple Inc. of Cupertino, Calif. These handheld computing devices can be configured such that a substantial portion of the electronic device takes the form of a display assembly used for presenting visual content. The display assembly generally includes an active display area configured to present visual content and a top protective layer used to provide protection against external effects, such as would be expected during normal use. However, in some cases, additional protection can be afforded both the tablet device and display assembly using a separate accessory device that takes the form of a protective cover attached to the tablet device. However, due to the relatively large size of the display in relation to the tablet device as a whole, little space is available for attaching the protective cover to the tablet device.
Therefore a cover that provides protection to a tablet device that is at least aesthetically pleasing and easy to attach/detach is desired.
A protective cover is described. The protective cover can be used with an electronic device such as a tablet device. The protective cover can include at least a segmented flap comprising a plurality of independently foldable segments separated from each other by a folding region. The segmented flap includes a top layer formed of a layer of protective finishing material having a first surface exposed to an external environment and a second surface opposite the first surface, and a laminate structure. In the described embodiment, the laminate structure includes a flexible net backing layer having a size and shape in accordance with the protective top layer. The layer of flexible net backing is adhered to the second surface of the protective top layer, the net backing layer provides resilient support for the protective top layer. The laminate structure of the protective cover also includes a support panel associated with and having a size and shape in accordance with each of the independently foldable segments separated from each other by a gap corresponding to the folding region, and a stiffener ring that is attached to and extends around most of an exterior perimeter of the protective top layer, the stiffener ring providing resilient support for the protective cover. The protective cover also includes a segmented bottom layer, the bottom layer including a layer of micro-fiber material segmented in a manner in accordance with the segmented flap.
In a particular embodiment of the protective cover, an integrated hinge is formed of a hinge tail in the form of a continuation of the layer of finishing material that wraps around an attachment mechanism used to releasably attach the protective cover to a host device such as the tablet device.
In another embodiment a consumer electronic product is described. The consumer electronic product includes at least an electronic device that, in turn, includes, a housing having side walls and a front facing opening, a display disposed in the front facing opening that includes a protective top layer, and a first magnetic attachment mechanism disposed at a first side wall of the housing. The consumer electronic product further includes a protective cover that includes a segmented flap having a plurality of independently foldable segments separated from each other by a folding region. In the described embodiment, the segmented flap includes a protective top layer formed of a layer of protective finishing material having a first surface exposed to an external environment and a second surface opposite the first surface. The protective cover also includes an integrated flexible hinge portion having a second magnetic attachment mechanism that cooperates with the first magnetic attachment mechanism to magnetically attach the protective cover and the electronic device. The hinge portion also includes a hinge tail formed of a continuation of the layer of protective finishing material that wraps around a second magnetic attachment mechanism to provide an appearance of continuity between the segmented flap and the integrated hinge portion.
In yet another embodiment, a consumer system includes a tablet device and a cover. The tablet device includes a housing having a front opening, a display assembly disposed within the front opening that includes a display, and a top protective layer disposed adjacent to the display. The tablet device also includes a plurality of sensors configured to detect a corresponding stimulus, and a magnetic attachment unit disposed within and secured to an inside side wall of the housing. In the described embodiment the cover includes a flap formed of a first material and having a size and shape in accordance with the display, an integral hinge assembly that includes a flexible hinge, the flexible hinge formed of a continuous layer of the first material of the flap, and a hinge magnetic attachment unit configured to activate the magnetic attachment unit causing the tablet device and the cover to magnetically attach to each other.
A method of producing a protective cover that includes a segmented flap having a plurality of independently foldable segment separated by a adjacent folding region, comprising is described. The method is carried out by providing a layer of protective finishing material having a first surface exposed to an external environment and a second surface opposite the first surface, attaching a net backing material to the second surface of the layer of protective finishing material, the net backing material having a size and shape in accordance with the layer of protective finishing material the net backing layer providing resilient support for the protective cover, attaching a support panel associated with and having a size and shape in accordance with each of the independently foldable segments separated from each other by a gap corresponding to the folding region between the net backing material and a resilient base layer, and attaching at bottom layer to the resilient base layer, the bottom layer conforming to the segments.
In a particular embodiment, an integrated hinge is formed using a continuation of the layer of protective finishing material that wraps around a magnetic attachment mechanism used to attach the protective cover to a host device.
FIG. 3B shows the article and the electronic device of FIG. 3A magnetically attached to each other to form a cooperating system using the top magnetic attachment system.
FIG. 7B shows a graphical representation of a cooperating system formed by the magnetic attachment of the accessory device and the electronic device as shown in FIG. 7A.
FIG. 8A shows a first perspective view of the electronic device in the form of a tablet device and the accessory device in the form of a protective cover.
FIG. 8B shows a second perspective view of the electronic device in the form of a tablet device and the accessory device in the form of a protective cover.
FIG. 9A shows a closed configuration of the cooperating system formed by the tablet device and protective cover shown in FIGS. 8A and 8B.
FIG. 9B shows an open configuration of the cooperating system shown in FIG. 9A.
FIG. 10A shows a top view of an embodiment of a segmented cover assembly.
FIG. 10B shows a representative magnetic assembly.
FIG. 11 shows representation of hinge assembly coupled to tablet device forming as part of a triangular support structure illustrating representative magnetic interaction mechanisms.
FIGS. 12A-12D show representative cross sectional views of segmented cover assembly/tablet device along line AA shown in FIG. 10A.
FIGS. 13A-13B show a side view of a segmented cover configured to support a tablet device in a keyboard state.
FIGS. 14A-14C show side and perspective views, respectively, of the segmented cover configured to support a tablet device in a display state.
FIGS. 15A-15B shows cover assembly and tablet device in peek mode.
FIG. 16 shows an exploded view of segmented cover.
FIG. 17 is a block diagram of an arrangement of functional modules utilized by a portable media device.
FIG. 18 is a block diagram of an electronic device suitable for use with the described embodiments.
The protective cover can include at least a flexible hinge portion. The flexible hinge portion can include a flexible body, or tail, connected to a magnetic attachment mechanism that can include a plurality of magnets. A magnetic field provided by the magnets in the magnetic attachment mechanism can interact with a corresponding magnetic field provided by magnets in the electronic device. In this way, the hinge portion can be pivotally connected to the electronic device using only the magnets. In one embodiment, the protective cover can include a flap that is connected to the flexible hinge portion. The flap can therefore be smoothly rotated along a pivot line formed by the flexible hinge portion. When magnetically coupled to the tablet device, the smooth rotation of the flap about the pivot line can bring the flap in substantial contact with the display in a fully closed position. The flap can also be smoothly rotated about the pivot line to reveal most or all of the display. In one embodiment, the flap can be segmented by which it is meant that the flap can be divided into distinct portions that can fold and bend with respect to each other as well as the tablet device more specifically in some cases, the display. In this way, the segmented flap affords an additional option of revealing only specific portions of the display by folding individual segments to reveal a corresponding portion of the display while other segments remain in contact and therefore obscuring the display.
In some embodiments, the flap can include a variety of magnets that can be used to form a number of structures well suited for use with the electronic device. For example, the flap can include a first plurality of magnets linearly arrayed along a first edge (i.e., first edge magnets) and a second plurality of magnets positioned in corresponding locations along a second edge opposite the first edge (second edge magnets). In a particular embodiment, corresponding ones of the first and second edge magnets have opposite polarities. In this way, when the first edge and the second edge are brought into spatial proximity to each other, magnetic fields of the first and second edge magnets interact with each other to form a magnetic attractive force that causes the first and second edges to attach to each other. In this way, the flap can form a structure that can be used to enhance the functionality of the cover with regards to the electronic device.
For example, if the flap is constructed to have three independently foldable segments (referred to as segment A, segment B, and segment C) where segment A is attached to the foldable hinge at the first edge having the first edge magnets and segment C is opposite segment A that is defined in part by the second edge having the second edge magnets, a triangular structure ABC can be formed when the first edge magnets and the second edge magnets attract each other when segment A is within proximity to segment C. It should be noted that the properties of the triangular structure ABC can vary in accordance with the relative sizes of the segments A, B, and C. In other words, is segments A, B, and C are about equal in width, then triangular structure ABC can take the form of an equilateral triangle, whereas if two segments are about of equal width, then the triangular structure ABC can take on the shape of an isosceles triangle. It should be noted that in some embodiments, the triangular structure can be used to present the display at an angle of about 5-15.degree. in a keyboard mode well suited for using a keyboard presented at the display or about 65-80.degree. in a movie mode well suited for viewing visual content presented at the display at a comfortable viewing angle.
In one embodiment, the flap can include electronic circuits or other elements (passive or active) that can cooperate with electronic elements in the electronic device. As part of that cooperation, signals can be passed between the protective cover and the electronic device that can, for example, be used to modify operations of the electronic device, operations of electronic circuits or elements of the protective cover, and so forth. As an example, the electronic device can include one or more magnetically sensitive circuits such as a Hall Effect sensor and as such can detect the presence of a magnetic field. The Hall Effect sensor can respond to properties of a magnetic field (such as the presence of magnetic field, a magnetic field strength, polarity, etc.) by generating a signal. The signal can be used to alter an operating state of the electronic device.
Accordingly, the protective cover can include a magnetic element, or elements, such as a permanent magnet having a magnetic field that can be detected the Hall Effect sensor to generate the signal. The magnet(s) can be positioned in the protective cover in various locations in the flap that can be detected by the magnetic sensors when the magnets are proximate to the corresponding magnetic sensor. The magnetic sensors can send information to a processor in the electronic device that can evaluate the signals from the multiple sensors. The evaluation of the signals from the sensors can provide the processor with information that can be used to determine a spatial relationship between the flap and the electronic device or even if the protective cover is attached to the electronic device. For example, the processor can use the signals from the sensors to indicate a relative position of the flap to the electronic device and in response alter an operating state of the electronic device accordingly. For example, when the signals indicate that the flap is fully closed (i.e.; both magnetic sensors detect a corresponding magnetic field), then the processor can prevent the display from presenting visual content. On the other hand, if one sensor detects the corresponding magnetic field and the other sensor does not detect the corresponding magnetic field, then the processor can use this information to determine that only a portion of the display is viewable (that portion of the display corresponding to the portion of the flap having the magnet that is not detectable by the sensor). In this situation, the processor can cause the display to present visual content at only the viewable portion of the display.
These and other embodiments are discussed below with reference to FIGS. 1-18. However, those skilled in the art will readily appreciate that the detailed description given herein with respect to these figures is for explanatory purposes only and should not be construed as limiting. For the remainder of this discussion, a first and second object each suitably configured to magnetically attach to each other in accordance with the described embodiments will be described. It should be noted, however, that any number and type of suitably configured objects can be magnetically attached to each other in a precise and repeatable manner. In particular, for simplicity and clarity, for the remainder of this discussion, the first object is presumed to take the form of an electronic device and in particular a handheld electronic device. The handheld electronic device can, in turn, take the form of a tablet device, portable media player, and so forth.
In some cases, at least a portion of the display can be touch sensitive. By touch sensitive it is meant that during a touch event, an object (such as a finger, stylus, and so on) can be placed in contact with or in proximity to an upper surface of the display. The particulars of the touch event (location, pressure, duration, and so forth) can be used to provide information to the portable electronic device for processing. In some embodiments, in addition to or in place of information being provided to the portable electronic device, information can be provided by the portable electronic device in a tactile manner using, for example, haptic actuators. It should be appreciated however that this configuration is by way of example and not by way of limitation as the electronic device can be widely varied. In one example, the portable electronic device is a tablet device such as, for example, the iPad.TM. manufactured by Apple Inc. of Cupertino, Calif.
The attachment systems can include one or more attachment features. If multiple features are used, the manner in which they secure can be the same or different. For example, in one implementation, a first attachment feature utilizes a first attachment mechanism while a second attachment feature utilizes a second attachment mechanism that is different than the first attachment mechanism. For example, the first attachment mechanism can utilize a friction coupling while the second attachment means can utilize magnetism. For example, the first and second attachment mechanisms can be provided by magnets. Although, the attachment mechanisms can be similar it should be appreciated that the configuration of the mechanisms can be different depending on the needs of the system. Further, any number and configuration of attachment mechanisms can be used.
FIG. 3B shows article 30 and electronic device 32 magnetically attached to each other to form cooperating system 38. As part of system 38, electronic device 32 and article 30 can cooperate with each other to provide features not available by article 30 or electronic device 32 separately. For example, article 30 can take the form of a cover that can provide protective features. In one embodiment, protective cover can be used to support and protect electronic device 32 while being transported or stored (e.g., cover the display surface). Due to the releasable nature of the magnetic attachment between magnetic attachment systems 34 and 36, article 30 can be easily detached when electronic device 32 is to be used and subsequently re-attached when desired.
FIGS. 4A and 4C are simplified perspective views of article 40 that can be releasably attached to electronic device 42 via a magnetic system 44. This embodiment is similar to that shown in FIGS. 2A, 2B and 3A, 3B in that magnetic system 44 can include multiple magnetically attractable elements and that article 40 and electronic device 42 generally correspond to those mentioned in previous Figures. For example, one set of magnetically attractable magnetic elements 44a can be placed relative to a side of article 40 and electronic device 42 while a second set of magnetically attractable elements 44b can be placed relative to a face of article 40 and electronic device 42. As shown in FIG. 4B, cooperating system 46 can be formed by placing article 40 and electronic device 42 within proximity to each other such that magnetic elements 44a on the sides of article 40 and electronic device 42 magnetically attract each other in addition to magnetic elements 44b located at the face of electronic device 42 and article 40. The overall magnetic attraction generated at the side and face can be sufficient to retain article 40 and electronic device 42 in a mating engagement to form cooperating system 46.
In one embodiment, as shown in FIG. 4C, cooperating system 46 is presented in an open configuration in which article 40 is used as a cover for electronic device 42 that can be opened and closed. That is, article 40 can act as a protective cover of electronic device 42. In this embodiment, article 40 can include binding 48 that attaches along the side of electronic device 42 and flap 50 that attaches to the front face of electronic device 42 and more particularly, top face 52. Top face 52 can correspond to a display. In one implementation, flap 50 can move relative to binding 48. The moving can be widely varied. In one example, flap 50 can pivot relative to binding 48. The pivot can be widely varied. In one example, the pivot can be enabled by a hinge mechanism. In another example, the pivot can be enabled by a fold. Furthermore, the flap can be rigid, semi-rigid or flexible. In this manner, article 40 can form an open configuration where flap 50 is positioned away from electronic device 42 (display 52 can be viewed) and a closed configuration where flap 50 is positioned adjacent electronic device 42 (display 52 is covered as represented by closed embodiment of FIG. 4B). In one embodiment, binding 48 is only located on one side while flap 50 is only located at top face 52. In so doing, the other surfaces of electronic device 42 are left exposed. As a result, the beauty of the electronic device may be shown off while the article is attached to the electronic device. Further, it may leave better access for I/O and connectivity related functionality (e.g., buttons, connectors, etc.).
The electronic device and article can take many forms. For the remainder of this discussion, the electronic device is described in terms of a handheld portable computing device. Accordingly, FIG. 5 shows a top perspective view of electronic device 100 in accordance with the described embodiments. Electronic device 100 can process data and more particularly media data such as audio, visual, images, etc. By way of example, electronic device 100 can generally correspond to a device that can perform as a smart phone, a music player, a game player, a visual player, a personal digital assistant (PDA), a tablet device and the like. Electronic device 100 can also be hand held. With regards to being handheld, electronic device 100 can be held in one hand while being operated by the other hand (i.e., no reference surface such as a desktop is needed). Hence, electronic device 100 can be held in one hand while operational input commands can be provided by the other hand. The operational input commands can include operating a volume switch, a hold switch, or by providing inputs to a touch sensitive surface such as a touch sensitive display device or a touch pad.
Electronic device 100 can include a magnetic attachment system that can be used to magnetically attach electronic device 100 to at least one other suitably configured object. The magnetic attachment system can include a number of magnetic attachment features distributed within and in some cases connected to housing 102. For example, the magnetic attachment system can include first magnetic attachment feature 108 and second magnetic attachment feature 110 located on different sides of electronic device 100. In particular, first magnetic attachment feature 108 can be located in proximity to side wall 102a of housing 102. Second magnetic attachment feature 110 can be located within opening 104 near side walls 102c and 102d proximate to side wall 102b of housing 102. By placing magnetic attachment feature 110 at opposite side walls, an amount of racking (or lateral movement) of a cover magnetically secured by attachment feature 110 can be substantially reduced. In those embodiments where electronic device 100 includes a display with cover glass 106 substantially filling opening 104, second attachment feature 110 (also referred to as securing attachment feature 110) can be placed beneath cover glass 106. It should be noted that without loss of generality, first magnetic attachment feature 108 will henceforth be referred to as device attachment feature 108.
Device attachment feature 108 can operate in an active state as in well as an inactive state. Magnetic flux density B.sub.112 can equal or exceed a magnetic flux density threshold B.sub.threshold inside the exterior surface of housing 102 but not outside in the inactive state. In other words, magnetic flux density B.sub.112 of magnetic field 112 at an exterior surface of housing 102 is less than a magnetic flux density threshold B.sub.threshold. Magnetic flux density threshold B.sub.threshold representing a magnetic flux value below which magnetically sensitive devices (such a magnetic strip on a credit card) can remain substantially unaffected. In addition, the presence of a magnetically active material (such as steel) in the region outside of electronic device 100 will not by itself trigger device attachment feature 108 to transition from the inactive state to the active state.
At least some of the plurality of magnetic elements 116 can have a fixed size and polarity (along the lines of a simple bar magnet) whereas other of the plurality of magnetic elements 116 can have magnetic properties that can vary (such as an electromagnet) while still others can be shaped to provide specific magnetic characteristics. For example, at least one of the plurality of magnetic elements 116 can be positioned and shaped (if need be) to interact with a magnetically responsive circuit included in the other device. Hence, the magnetically responsive circuit can respond to the presence (or absence) of a particular magnetic element(s) of securing feature 110. An example of the magnetically responsive circuit is described above with regards to the Hall Effect sensor(s) 118.
It should be noted that the magnetic field generated by magnetic elements 116 should not extend so far that magnetically sensitive circuits within electronic device 100 (such as Hall Effect sensors 118) are adversely affected. This is particularly important since the magnetic field is not generally contained within housing 102 since at least a portion of the magnetic field must extend in the z direction in order to interact with the magnetically active portion of other devices. Therefore, the magnetic field in {x,y} must be limited in extent to avoid magnetically sensitive circuits such as Hall Effect sensor 118 and compass 120. In one embodiment, the shaping of the magnetic field in {x,y} can be accomplished using what can be referred to as shaping magnets discussed in more detail below. Moreover, some or all of magnets 116 can be shaped (such as a trapezoid) that contours magnetic field lines between each of the magnets 116 to restrict the extent in {x,y} to avoid unduly affecting sensitive magnetic circuits such as compass 120.
In a particular implementation, the magnetic elements of device attachment feature 108 can be grouped into distinct magnetic regions. In this way, the magnetic fields from the magnetic regions can superpose to form magnetic field 112. The magnetic regions can include various magnetic elements that can be arranged into groups represented by magnetic elements 126 and 128. By grouping the magnetic element into separate magnetic regions, the ability of the magnetic attachment system to provide a magnetic field having desired characteristics can be substantially enhanced. Magnetic elements 126 and 128 can interact with each other to form magnetic field 112. In the one embodiment, the interaction can take the form of combination of magnetic properties of each of magnetic elements 126 and 128. In some cases, the arrangement of magnetic elements 126 and 128 can be related to each other in order to provide magnetic field 112 with desired characteristics. For example, magnetic elements 126 and 128 can be arranged in such a way relative to one another that magnetic field 112 is anti-symmetric (or symmetric) about a horizontal center line of magnetic attachment feature 108. In another embodiment, magnetic field 112 can be anti-symmetric (or symmetric) about a vertical center line of attachment feature 108. In still another embodiment, magnetic field 112 can be anti-symmetric (or symmetric) both horizontally and vertically.
FIG. 7A shows electronic device 100 in proximity to object 200 having magnetic attachment feature 202. Magnetic attachment feature 202 of object 200 can include magnetic elements each generating an individual magnetic field that can interact with the other to form in the aggregate a resulting magnetic field. The resulting magnetic field can have magnetic characteristics (such as field strength and shape) that can interact with magnetic field 112 of electronic device 100 to attach electronic device 100 and object 200 together in a well-defined, precise, and repeatable manner without mechanical fasteners and nor require external assistance.
More specifically, magnetic attachment feature 202 can include at least magnetic elements 204 and 206 each of which can generate magnetic fields that cooperate with each other to provide magnetic field 208 (only a portion of which is shown). The properties of magnetic field 208 can be based upon the interaction of each of the plurality of magnetic elements 204 and 206. In this way, magnetic field 208 can have properties based upon the physical layout, relative size, and constituent magnetic polarities of each of the plurality of magnetic elements 204 and 206. For example, magnetic elements 204 and 206 can be disposed along a center line and have magnetic properties that superpose to provide magnetic field 208 with desired properties.
As shown in FIG. 7B, the overall magnetic attractive force F.sub.NET between device 100 and device 200 at engagement surface 218 can be derived as the summation of all the net magnetic attractive forces F.sub.neti for all actively coupled magnetic elements. In other words, the overall net magnetic attractive force F.sub.NET satisfies the following equation: F.sub.NET=.SIGMA..sub.1.sup.nF.sub.neti where F.sub.neti is the net magnetic attractive force for each of n components. In one embodiment, net magnetic attractive force F.sub.neti is substantially perpendicular to that portion of engagement surface 218 intersected by magnetic field 112 and magnetic field 208.
In order to assure that overall magnetic attachment force F.sub.NET is uniform along the engagement surface between device 100 and device 200, the separation distances between each corresponding magnetic element in attachment features 108 and 202 are well controlled. The separation distance can be well controlled by, for example, shaping the magnetic elements to conform to the shape of the devices. For example, if device 100 has a spline (curved) shaped housing, the magnetic elements in device 100 can be shaped to conform to the curved shape. In addition, the magnetic elements can be formed in such a way that the magnetic vectors of corresponding magnetic elements align with each other. In this way, the magnitude and direction of the net magnetic attractive force can be controlled as desired.
One result of the aligning of the magnetic vectors is that the direction of the net magnetic force between each magnetic element can be well controlled. Moreover, by reducing the separation distance between corresponding magnetic elements to a minimum, the net attractive magnetic force F.sub.neti between each magnetic element can be maximized. In addition, maintaining a substantially uniform separation distance between the various magnetic elements, a correspondingly uniform magnetic attachment force can be provided along engagement surface 218. Moreover, by appropriately adjusting the corresponding magnetic vectors, F.sub.net can be applied normally to the engagement surface.
In one embodiment, accessory device 200 can include a number of protective elements that can be used to protect certain aspects of electronic device 100. For example, accessory device 200 can take the form of a protective cover. The protective cover can include a flap pivotally connected to a hinge assembly. The hinge assembly can, in turn, be coupled to electronic device 100 by way of accessory attachment feature 202. In this way, the flap portion can be used as a protective cover to protect aspects of electronic device 100 such as a display. The flap can be formed of various materials such as plastic, cloth, leather, and so forth. The flap can be segmented in such a way that a segment of the flap can be lifted to expose a corresponding portion of the display. The flap can also include a functional element that can cooperate with a corresponding functional element in electronic device 100. In this way, manipulating the flap can result in an alteration in the operation of electronic device 100.
Accessory device 200 can take the form of a support that can be used to enhance the functionality of electronic device 100. For example, accessory device 200 can be configured to act as a display stand on which a display of electronic device 100 can be viewed at a comfortable viewing angle such as 60.degree.-85.degree.. In other words, when placed upon a horizontal surface such as a table or desk, accessory device 200 can support electronic device 100 in such a way that the visual content presented at the display can be viewed at about a viewing angle of approximately 60.degree.-85.degree.. Accessory device 200 can also take the form of a support that can be used to enhance the functionality of electronic device 100 in a keyboard mode. In the keyboard mode, accessory device 200 can be used to present a touch pad surface at an angle that is ergonomically friendly. In this way, input touch events can be applied (to a virtual keyboard, for example) at an angle that does not overtax a user's wrist, hands, arms, etc.
The remainder of this discussion will describe particular embodiments of devices that can use the magnetic attachment system. In particular, FIG. 8A and FIG. 8B show electronic device 100 presented in terms of tablet device 800 and accessory device 200 is shown as cover assembly 900 each in perspective top views. These elements may generally correspond to any of those previously mentioned. In particular, FIGS. 8A and 8B shows two perspective views of tablet device 800 and cover assembly 900. For example, FIG. 8A shows magnetic surface 801 provided by device attachment feature 108 included in tablet device 800. In this configuration, magnetic surface 801 does not exhibit sufficient intensity to adversely affect sensitive magnetic components in the proximity of tablet device 800. Therefore, in this inactive mode, magnetic field 112 associated with magnetic surface 801 does not exceed B.sub.threshold. FIG. 8B, on the other hand, is the view presented in FIG. 8A rotated about 180.degree. to provide a second view of attachment feature 904 and its relationship with cover assembly 900.
As shown in FIG. 8A, tablet device 800 can include housing 802 that can enclose and support device attachment feature 108. In order to not interfere with the magnetic field generated by device attachment feature 108, at least that portion of housing 802 nearest device attachment feature 108 can be formed of any number of non-magnetic materials such as plastic or non-magnetic metal such as aluminum. Housing 802 can also enclose and support internally various structural and electrical components (including integrated circuit chips and other circuitry) to provide computing operations for tablet device 800. Housing 802 can include opening 804 for placing internal components and can be sized to accommodate a display assembly or system suitable for providing a user with at least visual content as for example via a display. In some cases, the display assembly can include touch sensitive capabilities providing the user with the ability to provide tactile inputs to tablet device 800 using touch inputs. The display assembly can be formed of a number of layers including a topmost layer taking the form of transparent cover glass 806 formed of polycarbonate or other appropriate plastic or highly polished glass.
Although not shown, the display assembly underlying cover glass 806 can be used to display images using any suitable display technology, such as LCD, LED, OLED, electronic or e-inks, and so on. 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. It can be placed flush with the adjacent portion of the housing. In this way, the display can present visual content that can include video, still images, as well as icons such as graphical user interface (GUI) that can provide information the user (e.g., text, objects, graphics) as well as receive user provided inputs. In some cases, displayed icons can be moved by a user to a more convenient location on the display. In some embodiments, a display mask can be applied to, or incorporated within or under cover glass 806. The display mask can be used to accent an unmasked portion of the display used to present visual content and can be used to make less obvious device attachment feature 108 and securing attachment feature 110. Cover 900 can include flap 902 and (not shown) flexible hinge 904 that can magnetically interact with magnetic attachment feature 108 to form a magnetic attachment force suitable for magnetically attaching cover 900 and tablet device 800. FIG. 8B shows tablet device 800 and cover 900 rotated in such a way to show more clearly flexible hinge assembly 904.
Cover assembly 900 is shown in FIGS. 9A and 9B attached to tablet device 800. FIG. 9A shows cover assembly 900 attached to tablet device 800 in a fully closed configuration in which flap 902 fully covers cover glass 806 and the corresponding portion of the display assembly. On the other hand, FIG. 9B shows cover assembly 900 attached to tablet device 800 in an open configuration in which cover glass 806 is fully viewable. In one embodiment, flap 902 can have a size and shape in accordance with a top portion of tablet device 800 such as cover glass 806. Flap 902 can be pivotally connected to flexible hinge assembly 904. Flexible hinge assembly 904 can include magnetic attachment feature 202 in the form of an array of magnets arranged to magnetically interact with magnetic field 112 provided by magnetic attachment feature 108. The magnetic attachment force between flexible hinge assembly 904 and attachment feature 108 can maintain cover assembly 900 and tablet device 800 in a proper orientation and placement vis-a-vis flap 902 and cover glass 806. By proper orientation it is meant that cover assembly 900 can only properly attach to tablet device 800 having flap 902 and cover glass 806 aligned in a mating engagement. The mating arrangement between cover glass 806 and flap 902 is such that flap 902 covers substantially all of cover glass 806 when flap 902 is placed in contact with cover glass 806.
In order to transition from the closed to the open configuration, releasing force F.sub.release can be applied to flap 902. Releasing force F.sub.release can overcome the magnetic attractive force between attachment feature 216 in flap 902 and attachment feature 110 in tablet device 800. Hence, cover assembly 900 can be secured to tablet device 800 until releasing force F.sub.release is applied to flap 902. In this way, flap 902 can be used to protect cover glass 806. For example, cover assembly 900 can be magnetically attached to tablet device 900. Flap 902 can then be placed upon and magnetically secured to cover glass 806 by the magnetic interaction between magnetic attachment features 110 and 216. Flap 902 can be detached from cover glass 806 by the application of releasing force F.sub.release directly to flap 902. Releasing force F.sub.release can overcome the magnetic attraction between magnetic attachment features 110 and 216. Hence, flap 902 can then move away from cover glass 806 unhindered. In order to maintain a good magnetic attachment between flap 902 and magnetic attachment feature 110, flap 902 can include a number of magnetic elements. Some of the magnetic elements in flap 902 can interact with corresponding magnetic elements in magnetic attachment feature 110. The net magnetic attractive force generated between the magnetic elements can be strong enough to prevent inadvertent release of flap 902 from cover glass 806 during normal handling. The net magnetic attractive force, however, can be overcome by releasing force F.sub.release. It should be noted that using at least two magnetic attachment features 110 on either side of tablet device 800, lateral movement of cover 900 (also referred to as racking) can be essentially eliminated.
In some embodiments, flap 902 can be unitary in appearance by which it is meant that flap 902 can appear as a single unit such that flap 902 can bend slightly if formed of flexible material. However, in other cases, flap 902 can include a number of segments joined to adjacent segments by associated folding regions that permit the segments to fold independently of each other as well as with respect to tablet device 800. Accordingly, FIG. 10A shows a top view of a specific embodiment of cover assembly 900 in the form of cover assembly 1000. Cover assembly 1000 can include body 1002. Body 1002 can have a size and shape in accordance with cover glass 806. Body 1002 can be formed from a single piece of foldable or pliable material. Body 1002 can also be divided into segments separated from each other by a folding region. In this way, the segments can be folded with respect to each other at the folding regions.
In one embodiment, body 1002 can be formed of layers of material attached to one another forming a laminate structure. Each layer can take the form of a single piece of material that can have a size and shape in conformance with body 1002. Each layer can also have a size and shape that correspond to only a portion of body 1002. For example, a layer of rigid or semi-rigid material about the same size and shape of a segment can be attached to or otherwise associated with the segment. In another example, a layer of rigid or semi-rigid material having a size and shape in accordance with body 1002 can be used to provide segmented cover assembly 1000 as a whole with a resilient foundation. It should be noted that the layers can each be formed of materials having desired properties. For example, a layer of segmented cover assembly 1000 that comes in contact with delicate surfaces such as glass can be formed of a soft material that will mar or otherwise damage the delicate surface. In another embodiment, a material such as micro-fiber can be used that can passively clean the delicate surface. On the other hand, a layer that is exposed to the external environment can be formed of a more rugged and durable material such as plastic or leather.
In a specific embodiment, body 1002 can be partitioned into a number of segments that can be widely varied. In the embodiment shown in FIG. 10A, segmented body 1002 can be partitioned into three segments, segments 1004, 1006, and 1008 each coupled to an adjacent segment by thinner, foldable portions 1010. Each of the segments 1004-1008 can include one or more inserts disposed therein. By way of example, the segments can include a pocket region where the inserts are placed or alternatively the inserts may be embedded within the segments (e.g., insert molding). If pockets used, the pocket region can have a size and shape to accommodate corresponding inserts. The inserts can have various shapes but are most typically shaped to conform to the overall look of segmented body 1002 (e.g., rectangular). The inserts can be used to provide structural support for segmented body 1002. That is, the inserts can provide stiffness to the cover assembly. In some cases, the inserts may be referred to as stiffeners. As such, cover assembly 1000 is relatively stiff except along the foldable regions that are thinner and do not include the inserts (e.g., allows folding) making segmented cover assembly 1000 more robust and easier to handle. In one embodiment segments 1004, 1006, and 1008 can have a size relationship to each other such that a segments 1004-1008 can be used to form a triangular support structure. The triangular support structure can be used to enhance a user experience of tablet device 800.
For example, if segmented body 1002 is constructed to have three independently foldable segments (segment 1004, segment 1006, and segment 1008), a triangular structure can be formed by coupling segment 1004 and segment 1008 (using magnets as described below or simply friction coupling). It should be noted that the properties of the triangular structure can vary in accordance with the relative sizes of the segments 1004, 1006, and 1008. In other words, when segments 1004, 1006, and 1008 are about equal in width, then the triangular structure can take the form of an equilateral triangle, whereas when two segments are about of equal width, then the triangular structure can take on the shape of an isosceles triangle. In this way, the triangular structure can be shaped for a particular purpose. For example, in one configuration the triangular structure can be used to support tablet device 800 in a movie mode or in a keyboard mode.
In one embodiment, segmented body 1002 can include a number of magnets some of which can be used to form the triangular structure. For example, segment 1004 can include first edge attach magnets 1012 linearly arrayed along first edge 1014 of segmented body 1002 whereas segment 1008 can include second edge attach magnets 1016 linearly arrayed along second edge 1018 opposite to first edge 1014. In this embodiment, first edge attach magnets 1012 and second edge attach magnets 1016 have a one to one correspondence in which each first edge attach magnet 1012 can be associated with a corresponding one of second edge attach magnets 1016. Moreover, in order to create a maximum magnetic attractive force between first edge attach magnets 1012 and second edge attach magnets 1016, each magnet pair can exhibit opposite magnetic polarities. For example, when first edge attach magnets 1012 are arranged in first polarity pattern (alternating) M.sub.1{P1, P2, P1, P2, P1, P2, P1, P2}, then second edge attach magnets 1016 can be arranged in complementary priority pattern M.sub.2{P2, P1, P2, P1, P2, P1, P2, P1}. In this way, a maximum magnetic attachment force can be realized between the two magnetic arrays while minimizing magnetic fringe effects at the ends of the magnetic arrays. In one embodiment, first edge attach magnets 1012 and second edge attach magnets 1016 can have dimensions of approximately (L.times.W.times.H) of 10 mm.times.5 mm.times.8 mm formed of neodymium (N35SH) grade magnets. It should be noted that the number of edge attach magnets can vary from as few as two to more than 16.
It should be noted that in some cases, it can be desirable to constrain a magnetic field provided by first edge attach magnets 1012 and second edge attach magnets 1016 in order to avoid or at least control adverse magnetic affects on sensitive magnetic circuits such as compass 120 (whose position is indicated in relation to first edge attach magnets 1012 when segmented body 1002 is in the fully closed configuration). In order to control the adverse affects of the magnetic field generated by first edge attach magnets 1012, field shaping magnets 1022 can be placed in positions that can reduce a magnetic offset experienced by compass 120. Moreover, as shown in insert 1024, first edge attach magnets 1012 (as well as second edge attach magnets 1016) can be shaped in such a way that leakage magnetic flux .PHI..sub.leakage between the constituent magnets can be substantially reduced. In the embodiment shown in insert 1024, magnets 1026 are trapezoidal in form that limits the amount of magnetic flux .PHI..sub.leakage. In this way, the magnetic offset at compass 120 caused by first edge attach magnets 1012 can be maintained with an acceptable range. For example, the magnetic offset at compass 120 from edge attach magnets 1012 can be on the order of 10.degree. or less at a reference location.
One approach to forming at least one triangular support structure can be to simply friction couple segment 1004 and segment 1008. By friction couple it is meant that surface friction created between segments 1004 and 1008 when brought in direct contact can be sufficient to maintain the triangular structure even when used to support tablet device 800 in the movie mode or the keyboard mode. Alternatively, the triangular structure can be formed by bringing first edge attach magnets 1012 in proximity to second edge attach magnets 1016 thereby forming a magnetic circuit. It should be noted that in some embodiments, first edge attach magnets 1012 and second edge attach magnets 1016 are not required to overlay one another but merely be in proximity separated by distance "d" (shown in FIG. 11) from one another to create the magnetic circuit. Therefore, by creating the magnetic circuit configured to maintain the integrity of the triangular structure, the triangular structure can be used for multiple purposes to enhance the functionality of tablet device 800.
Segmented cover 1000 can also include holding magnets 1028 and 1030 that can be used to maintain segmented cover 1000 in a fixed position in relation to display 806 in the fully closed configuration. In other words, holding magnets 1028 and 1030 can reduce or even eliminate movement of cover 1000 from "side to side" (sometimes referred to as "racking"). In one embodiment, holding magnet 1030 can be oversized in relation to holding magnet 1028. In this way, first portion 1030a of holding magnet 1030 (i.e., that portion of holding magnet 1030 that does not function as an edge attach magnet) can cooperate with holding magnet 1028 to reduce racking of cover 1000 whereas edge attach portion 1030b of holding magnet 1030 can function as part of first edge attach magnets 1012.
In some cases, cover 1000 can also include magnets used to trigger magnetic sensors in tablet device 900. For example, segment 1004 can include first sensor magnet 1032 and segment 1006 can include second sensor magnet 1034. It should be noted that in some embodiments, first sensor magnet 1032 can be over-sized to prevent a false open condition in which tablet device 800 activates the display assembly even though body 1002 remains in the fully closed configuration. The false open condition can be triggered when body 1002 laterally moves (i.e., racking) to such an extent that a sensor disposed in tablet 800 can no longer detect the magnetic field generated by first sensor magnet 1032 causing the processor in tablet device 1032 to alter the operating state to active display mode. Therefore, the combination of oversizing of first sensor magnet 1032 and using holding magnets 1028 and 1030 to reduce racking, the incidence of false open condition can be greatly reduced.
In this arrangement, first sensor magnet 1032 can be detectable by a magnetically sensitive circuit (such as a Hall Effect sensor, or HFX) disposed within tablet 800. In particular, the HFX can detect a magnetic field provided by sensor magnets 1032 and 1034 through protective layer 806. In this way, a processor in tablet device 800 can use magnetic detection information to determine a spatial relationship between cover 1000 and tablet 800. More specifically, the detection information can provide an indication that segment 1004 is folded away from tablet 1000 (when sensor magnet 1032 is not detected and sensor magnet 1034 is detected). In this way, the processor can alter operation of tablet device 800 in accordance with the spatial relationship between cover 1000 and tablet 800. For example, when the processor determines that only segment 1004 is folded away to reveal a corresponding portion of display assembly 804, then the processor can change the operation of tablet 800 to provide visual content only by the revealed portion of display assembly 804 in what is referred to as peek mode. In some embodiments, tablet device 800 can operate in what is referred to as extended peek mode when sensor magnets 1032 and 1034 are not detected but the processor can determine that cover 1000 is magnetically attached to tablet 800 (in other words, segments 1004 and 1006 are folded away from tablet device 800 to reveal a corresponding portion of display assembly 804, but segment 1008 remains in place). In this way, tablet device 800 can present visual content in only that portion of display assembly 804 that is viewable (corresponding to folded away segments 1004 and 1006).
Cover 1000 can magnetically attach to tablet device 800 using flexible hinge assembly 1036 that can include flexible hinge 1038 and magnetic assembly 1040. Flexible hinge assembly 1036 can be integrated in the sense that there flexible hinge assembly 1036 is formed as part of segmented cover 1000. In some embodiments, flexible hinge assembly 1036 can be formed of the same material (fabric, leather, etc.) as is used to form a top portion of segmented cover 1000. In this way, the visual effect can be one of continuity when viewing segmented cover 1000. Further enhancing the sense of continuity is the wrap around nature of flexible hinge 1036. By wrap around it is meant that material that forms body 1002 (and in particular a top portion formed of fabric, for example) can continue beyond edge 1018 (sometimes referred to as a tail) to form flexible hinge 1038 that can wrap around magnetic assembly 1040. In this way, a sense of continuity between body 1002 and flexible hinge assembly 1036 can be achieved.
Flexible hinge assembly 1036 can include flexible hinge 1038 coupled to magnetic assembly 1040 configured to magnetically attach to magnetic attachment feature 108 in tablet device 800. In one embodiment, magnetic assembly 1040 can include a plurality of magnets configured to form a magnetic attachment with corresponding magnets in magnetic attachment feature 108. For example, FIG. 10B shows a representation of possible magnet arrays used to magnetically attach cover 1000 and tablet device 800. In one embodiment, magnetic assembly 1040 can include magnetic array 1042 arranged in alternating pattern M3 as follows: M3:{[P1,P2,P1],[P1,P2],[P2,P1],[P1,P2],[P2,P1,[P1,P2][P2,P1,P2]} (where brackets [ ] indicate physically grouped magnets).
On the other hand, magnetic attachment feature 108 disposed in tablet device 800 can include a corresponding magnetic array 1044 arranged in a manner that is complementary to alternative pattern M3. By complementary it is meant that magnetic polarities are inverted in that a magnet having a P1 polarity will be paired with a magnet having a P2 polarity and so forth. In this way, a maximum amount of magnetic attractive force between the two magnets can be realized with a minimum of magnetic fringing effects at either end of the magnetic array.
However, in still other embodiments as represented by magnetic array 1046, specific magnets can be replaced by ferromagnetic blocks in order to conserve on the number of magnets used for magnetic attachment. For example, in one embodiment, a reduced number of magnets can be used in magnetic attachment feature 108 by replacing some magnets with ferromagnetic blocks (B) and can be arranged in polarity pattern M4 as follows: M4:{[P1,B,P1],[P1,P2],[P2,P1],[P1,P2],[P2,P1,[P1,P2][P2,B,P2]} where B represents a ferromagnetic block formed of ferromagnetic material such as 1010 steel. It should be noted that the arrangement of magnets in either magnetic attachment feature 108 or magnetic assembly 1040 can be widely varied. Any limitations can be due primarily to the relationship between the magnetic arrays and the desired properties of the magnetic attachment.
The cover can be produced by providing a layer of protective finishing material having a first surface exposed to an external environment and a second surface opposite the first surface, attaching a net backing material to the second surface of the layer of protective finishing material, the net backing material having a size and shape in accordance with the layer of protective finishing material the net backing layer providing resilient support for the protective cover, attaching a support panel associated with and having a size and shape in accordance with each of the independently foldable segments separated from each other by a gap corresponding to the folding region between the net backing material and a resilient base layer, and attaching at bottom layer to the resilient base layer, the bottom layer conforming to the segments. A flexible hinge portion integrated with the segmented flap, by wrapping a hinge tail about a magnetic attachment feature, the hinge tail being a continuation of the layer of protective finishing material, wherein a length of the hinge tail is adjusted to provide strain relief in accordance with expected stress incurred while the protective cover is magnetically attached to a host device and while being used.
FIG. 11 also illustrates representative magnetic interaction between edge attach magnets 1012 and 1016 in accordance with magnetic circuit 1102. Magnetic circuit 1102 can be associated with magnetic attraction force F.sub.attraction. Magnetic attraction force 1104 can correspond with magnetic flux density associated with magnetic field lines 1106. For example, the magnetic flux density associated with magnetic circuit 1102 in region A (where magnets 1012 and 1016 are closest together) can be greater than the magnetic flux density in region B where magnets 1012 and 1016 are further apart. In this way, magnetic attraction force 1104 between segment 1008 and 1004 can be strongest in region A. Moreover, a magnetic interaction between magnet 1012 and magnets 1050 and 108 can be such that net repulsive force Fr can be applied to segment 1004 that increases the net attachment force between segments 1004 and 1008. In other words, the total attachment force between segments 1004 and 1008 can be the aggregate of magnetic attraction force F.sub.attraction and magnetic repulsion force F.sub.repulsion.
FIGS. 12A-12D show representative cross sectional views of segmented cover assembly 1000/tablet device 800 along line AA shown in FIG. 10A. In particular, FIG. 12A shows cover assembly 1000 in fully closed configuration 1200 in which interior surface 1204 of cover assembly 1000 comes in full contact with cover glass 806 of tablet device 800. In fully closed configuration 1200, Hall Effect sensor 118-1 can detect a magnetic field provided by sensor magnet 1032. Concurrently Hall Effect sensor 118-2 can detect a magnetic field provided by sensor magnet 1034. In this way, the processor can use the detection information provided by Hall Effect sensors 118-1/118-2 to determine a folded configuration of cover 1000 and the associated spatial relationship between cover 1000 and tablet device 800. For example, using the detection information from Hall Effect sensors 118-1/118-2, the processor determines that cover 1000 is in fully closed configuration 1200 where interior surface 1204 of cover 1000 is in full contact with cover glass 806. In this way, once the processor has determined the spatial relationship between cover 1000 and tablet device 800, the processor can cause tablet device 800 to operate in a manner in accordance with the determined spatial relationship. For example, when the processor determines that cover 1000 is in fully closed configuration 1200, the associated spatial relationship is one where interior surface 1204 is in full contact with cover glass 806 thereby rendering the display and any visual content presented thereon as being un-viewable. Accordingly, the processor can direct that tablet device 800 disable or at least prevent visual from being presented by the un-viewable display. This can be referred to as a sleep mode.
FIG. 12B shows partially open configuration 1202 where segment 1004 is folded away from cover glass 806 in such a way that portion 806-1 of display is rendered viewable. In partially open configuration 1202, Hall Effect sensor 118-1 cannot detect the magnetic field provided by sensor magnet 1032 since any magnetic field from magnet 1032 at Hall Effect sensor 118-1 is not greater that a minimum detection threshold. In this case, the processor can use detection information from Hall Effect sensor 118-2 and Hall Effect sensor 118-2 to deduce that only segment 1004 is folded away from cover glass 806 revealing portion 806-1 of cover glass 806. In this way, only that portion of the display corresponding to portion 806-1 is viewable. In this situation, the processor can cause tablet device 800 to operate in a manner in accordance with partially open configuration 1202. In one embodiment, tablet device 800 can operate in such a way that although the display remains fully active, visual content is presented only at the viewable portion of the display that corresponds to portion 806-1. In an alternative embodiment, all but the viewable portion of the display can be de-activated. In this way, power can be conserved. In yet another alternative embodiment, visual content such as a graphical user interface, or GUI, can be altered in such a way to accommodate the reduced visual display area. For example, an amount of video resources allocated to display the GUI can be modified to take into account the reduced display area. The video resources can include number of pixels, pixel depth, and so forth.
It should be noted that in the case where neither Hall Effect sensors 118-1 or 118-2 detect either sensor magnet 1032 or 1034, then cover 1000 can be in one of two possible states. A first state being the fully open configuration in which substantially all of cover glass 806 is revealed such that substantially of the display assembly can present visual content. However, a second state (also referred to as extended peek mode) can be associated with segments 1004 and 1006 being folded away from cover glass 806 but segment 1008 remains in place. The fully open configuration can be distinguished from the extended peek state by determining if cover 1000 is magnetically attached to tablet device 800. This determination can be accomplished using magnetically sensitive circuits such as compass 120. If a magnetic offset consistent with the presence of magnetic attachment feature 108 being in active mode is experienced by compass 120, then the processor can infer that cover 1000 is magnetically attached to tablet device 800 and in so doing can alter the operation of tablet device 800 in accordance with the extended peek mode (such as presenting visual content at a viewable part of the display assembly).
FIGS. 12C and 12D show embodiments whereby cover 1000 is folded in such a way that interior surface 1204 is in contact with rear surface 808 of tablet device 800 in first reverse folded configuration 1206. Reverse folded configuration 1206 can be useful in those situations where tablet device 800 includes a camera or other such imaging device. In this way, a user can hold tablet device 800 using reverse folded configuration 1206 enabling use the display assembly as a viewfinder that can be used to compose an image or video. It should be noted that magnetic detection circuits such as Hall Effect sensor 118-1 and Hall Effect sensor 118-2 can be configured in such a way that in reverse folded configuration 1206, only one of the magnetic detection circuits can detect a corresponding magnet in cover 1000. For example, in reverse folded configuration 1206, Hall Effect sensor 118-1 can detect magnet 1032 whereas Hall Effect sensor 118-2 cannot detect magnet 1034. This variation in detectability can be accomplished by, for example, varying the magnetic properties of the magnets or by providing a magnetic shield that reduces a magnetic field that emanates from rear surface 806 in the vicinity of Hall Effect sensor 118-2.
Accordingly, when Hall Effect sensor 118-1 detects magnet 1032 and Hall Effect sensor 118-2 does not detect magnet 1034, then tablet device 800 can operate in accordance with first reverse folded configuration 1206. For example, in reverse folded configuration 1206, tablet device 800 can operate in a manner that facilitates use of the display assembly as a view finder. In an alternative embodiment shown in FIG. 12D in which cover 1000 is in second reverse folded configuration also referred to as rear camera folded configuration 1208, neither Hall Effect sensor 118-1 nor Hall Effect sensor 118-2 can detect magnets 1032 or 1034. In this arrangement, an attachment detection device (such as compass 120) can be used to detect if cover 1000 is magnetically attached to tablet device 800. In this way, when it is determined that tablet device 800 is attached to cover 1000 and cover 1000 is in second reverse folded configuration 1208, then tablet device 800 can operate accordingly. Table 1 summarizes some of the relationships between detection signals provided by HFX sensors 118-1 and 118-2 and the corresponding spatial relationship between cover 1000 and tablet device 800 in terms of a folded configuration of cover 1000.
In addition to providing protection to tablet device 800, segmented cover assembly 1000 can be manipulated to form useful support structures. Accordingly, FIGS. 13 through 15 show useful arrangements of cover assembly 1000 in accordance with the described embodiments.
FIGS. 13A-13B show a side view of a segmented cover configured to support a tablet device in a keyboard state. As shown in FIGS. 13A and 13B, segmented cover assembly 1000 can be folded into first triangular structure 1300 by forming in one embodiment, magnetic circuit 1102 by bringing segment 1004 and 1008 in proximity to each other (it should be noted that a friction coupling between the segments can also suffice to form triangular structure 1300). Triangular structure 1300 can be formed that can be used in many ways to augment tablet device 800. For example, triangular structure 1300 can be used to support tablet device 800 in such a way that a touch sensitive surface disposed beneath cover glass 806 is positioned relative to a support surface at an ergonomically advantageous angle. In this way, using the touch sensitive surface can be a user friendly experience. This is particularly relevant in those situations where the touch sensitive surface is used over an extended period of time. For example, a virtual keyboard can be presented at the touch sensitive surface. The virtual keyboard can be used to input data to tablet device 800. By using triangular structure 1300 to support tablet device 800 at the ergonomically friendly angle, the deleterious effects of repetitive movements can be reduced or even eliminated. In the described embodiment, presentation angle .theta. can be in the range of 5.degree. to 15.degree.. FIG. 13B shows an alternative embodiment where cover 1000 is folded into second triangular structure 1302 in which segment 1004 is viewable in contrast to first triangular structure 1300 where segment 1004 was obscured from view by tablet device 800 and segment 1008 is viewable.
FIGS. 14A and 14B shows another folded configuration of segmented cover assembly 1000 in which triangular support structure 1400 can be used to support tablet device 800 in a viewing state. By viewing state it is meant that triangular structure 1400 can support tablet device 800 in such a way that the display assembly can present visual content (visual, stills, animation, etc.). For example, in a first display configuration triangular support structure can support tablet device 800 such that the display assembly can present visual content at a presentation angle of about 65.degree. to about 85.degree.. In this "kickstand" state, visual content can be presented for easy viewing. FIG. 14B illustrates another arrangement of cover 1000 in the form of triangular support structure 1402 in which tablet device 800 can be supported in manner such that the display assembly presents visual content. FIG. 14C shows a front view of tablet device 800 supported in the viewing state in accordance with the described embodiments.
FIGS. 15A-15B show configuration 1500 of cover assembly 1000 and tablet device 800 illustrating what is referred to as a peek mode of operation of tablet device 800. More particularly, when segment 1004 is lifted from glass cover 806, sensors in tablet device 800 can detect that segment 1004 and only that segment has been lifted from glass layer 806. Once detected, tablet device 800 can activate only the exposed portion 1502 of the display. For example, tablet device 800 can utilize a Hall Effect sensor to detect that segment 1004 has been lifted from glass cover 806. Additional sensors, such additional Hall Effect sensor or other type sensors such as optical sensors (ambient light sensor, for example) can then detect if only segment 1004 has been lifted or if additional segments have been lifted.
As shown in FIG. 15B, when tablet device 800 has determined that only segment 1004 has been lifted, then tablet device 800 can change operating state to "peek" state in which only the exposed portion 1502 of the display actively presents visual content in the form of icons 1504. Hence, information in the form of visual content such as time of day, notes, and so forth can be presented for viewing on only that portion of display viewable. Once the sensors detect that segment 1004 has been placed back on glass layer 806, tablet 800 can return to the previous operational state such as a sleep state. Furthermore, in another embodiment, when an icon arranged to respond to a touch is displayed, then that portion of a touch sensitive layer corresponding to the visible portion of the display can also be activated.
Furthermore, as additional segments are lifted from cover glass 806 to further expose additional portions of cover glass 806, additional portions of the display can be activated corresponding to the lifted segments. In this way, in the "extended" peek mode, additional visual information can be presented in the portions of the display activated. In this way, as segments are lifted from cover glass 806, additional segments of the display can be activated providing the extended peek modes in accordance with the number of foldable segments. Alternatively, the tablet device 900 can respond to the signals from the Hall Effect sensor(s) by simply powering up the display when the flap is moved away from the display and power down (sleep) when the display is covered by the flap.
FIG. 16 shows an exploded view 1600 of segmented cover 1000. Bottom layer 1602 can come in direct contact with a protected surface such as a cover glass for a display. Bottom layer 1602 can be formed of a material that can passively clean the protected surface. The material can be, for example, a microfiber material. Bottom layer 1602 can be attached to stiffening layer 1604 formed of resilient material such as plastic. Stiffening layer 1604 can, in turn, be adhesively attached to inserts 1606 to form a laminate structure. Inserts 1606 can be formed of resilient material such as plastic. It should be noted that although not shown, some of inserts 1606 can accommodate embedded components such as holding magnet 1028, sensor magnets 1032 and 1034, and so on. Edge support ring 1608 can be used to provide lateral stability to cover 1000. Magnetic assembly 1040 can be attached to flexible hinge portion 1038 using adhesive layers 1610. Magnetic assembly 1040 can include magnets 1050 supported by span 1612. Span 1612 can be formed of a strong resilient material such as 304 SUS. It should be noted that in some embodiments, metal portions of 1612 can be sand-blasted in order to facilitate bonding between span 1612 and protective layer 1602 using adhesive layers 1616. In a particular embodiment, span 1612 can be attached to protective layers 1602 using pressure sensitive adhesive, or PSA. An additional laminate structure can be formed of resilient material 1616 and top layer 1618. In some embodiments, an intervening layer of material can be provided having a knitted structure that can aid in the attachment of top layer 1618 to resilient material 1616. Top layer 1618 can be formed of many materials such as plastic, leather, and so forth in keeping with the overall look and feel of tablet device 800. In order to provide additional structural support, edge stiffener ring 1608 can be used to reinforce edges of cover 1000. Edge stiffener ring 1608 can be formed of plastic or other rigid or semi-rigid material. It should be noted that in order to preserve the aesthetic look of cover 1000, cosmetic finish 1620 can be used to cover portions of magnetic assembly 1040.
FIG. 17 is a block diagram of an arrangement 1700 of functional modules utilized by an electronic device. The electronic device can, for example, be tablet device 900. The arrangement 1700 includes an electronic device 1702 that is able to output media for a user of the portable media device but also store and retrieve data with respect to data storage 1704. The arrangement 1700 also includes a graphical user interface (GUI) manager 1706. The GUI manager 1706 operates to control information being provided to and displayed on a display device. The arrangement 1700 also includes a communication module 1708 that facilitates communication between the portable media device and an accessory device. Still further, the arrangement 1700 includes an accessory manager 1710 that operates to authenticate and acquire data from an accessory device that can be coupled to the portable media device.
FIG. 18 is a block diagram of an electronic device 1750 suitable for use with the described embodiments. The electronic device 1750 illustrates circuitry of a representative computing device. The electronic device 1750 includes a processor 1752 that pertains to a microprocessor or controller for controlling the overall operation of the electronic device 1750. The electronic device 1750 stores media data pertaining to media items in a file system 1754 and a cache 1756. The file system 1754 is, typically, a storage disk or a plurality of disks. The file system 1754 typically provides high capacity storage capability for the electronic device 1750. However, since the access time to the file system 1754 is relatively slow, the electronic device 1750 can also include a cache 1756. The cache 1756 is, for example, Random-Access Memory (RAM) provided by semiconductor memory. The relative access time to the cache 1756 is substantially shorter than for the file system 1754. However, the cache 1756 does not have the large storage capacity of the file system 1754. Further, the file system 1754, when active, consumes more power than does the cache 1756. The power consumption is often a concern when the electronic device 1750 is a portable media device that is powered by a battery 1774. The electronic device 1750 can also include a RAM 1770 and a Read-Only Memory (ROM) 1772. The ROM 1772 can store programs, utilities or processes to be executed in a non-volatile manner. The RAM 1770 provides volatile data storage, such as for the cache 1756.
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