Patent Publication Number: US-11650713-B2

Title: Portable electronic device with interface reconfiguration mode

Description:
RELATED APPLICATIONS 
     This application is a continuation of U.S. patent application Ser. No. 17/130,674, “Portable Electronic Device with Interface Reconfiguration Mode,” filed Dec. 22, 2020, which is a continuation of U.S. patent application Ser. No. 16/270,801, “Portable Electronic Device with Interface Reconfiguration Mode,” filed Feb. 8, 2019, which is a continuation of U.S. patent application Ser. No. 14/710,125, “Portable Electronic Device with Interface Reconfiguration Mode,” filed May 12, 2015, which is a continuation of U.S. patent application Ser. No. 12/364,470, “Portable Electronic Device with Interface Reconfiguration Mode,” filed Feb. 2, 2009, which is a continuation of U.S. patent application Ser. No. 11/459,602, “Portable Electronic Device with Interface Reconfiguration Mode,” filed Jul. 24, 2006, now U.S. Pat. No. 7,509,588, which claims priority to U.S. Provisional Patent Application No. 60/755,368, filed Dec. 30, 2005, entitled “Portable Electronic Device with Interface Reconfiguration Mode,” each of which is hereby incorporated by reference in its entirety. 
    
    
     TECHNICAL FIELD 
     The disclosed embodiments relate to user interfaces, and in particular, to user interfaces that use touch-sensitive displays and include an interface reconfiguration mode. 
     BACKGROUND 
     As portable devices become more compact, and the amount of information to be processed and stored increases, it has become a significant challenge to design a user interface that allows users to easily interact with the device. This is unfortunate since the user interface is the gateway through which users receive not only content but also responses to user actions or behaviors, including user attempts to access a device&#39;s features or tools. Some portable electronic devices (e.g., mobile phones) have resorted to adding more pushbuttons, overloading the functions of pushbuttons, or using complex menu systems to allow a user to access, store and manipulate data. These conventional user interfaces often result in complicated key sequences and menu hierarchies that must be memorized by the user. 
     Many conventional user interfaces, such as those that include physical pushbuttons, are also inflexible. This is unfortunate because it may prevent a user interface from being configured and/or adapted by either an application running on the portable device or by users. When coupled with the time consuming requirement to memorize multiple key sequences and/or menu hierarchies, such inflexibility is frustrating to many users. 
     Some conventional user interfaces can be configured by users, thereby allowing at least partial customization. Unfortunately, the process of modifying such conventional user interfaces is often as cumbersome and complicated as the use of the conventional user interface itself. In particular, the required behaviors during configuration of such conventional user interfaces are often counter intuitive and the corresponding indicators guiding user actions are often difficult to understand. These challenges are often a source of additional frustration for users. 
     Accordingly, there is a need for a more transparent and intuitive user interfaces for portable devices that enable a user to configure the user interface. 
     SUMMARY OF EMBODIMENTS 
     The above deficiencies and other problems associated with user interfaces for portable devices are reduced or eliminated by the disclosed portable electronic device, which includes an interface reconfiguration mode that intuitively allows a user to reposition displayed graphical objects. 
     One aspect of the invention is a method in which a portable electronic device displays a first plurality of icons (e.g., graphical objects) in a first region in a touch-sensitive display; detects a first predefined user action, with respect to the touch-sensitive display, for initiating a predefined user interface reconfiguration process; and varies positions of one or more icons in the first plurality of icons in response to detecting the first predefined user action. The varying includes varying the positions of the one or more icons about respective average positions. 
     The varying may include animating the one or more icons to simulate floating of the one or more icons on a surface corresponding to a surface of the touch-sensitive display. 
     The varying position of a respective icon in the one or more icons may correspond to an equation of motion in a plane substantially coincident with the touch-sensitive display. The equation of motion may have a coefficient of friction less than a threshold, a non-zero initial velocity for the respective icon, a non-zero angular velocity, and/or a restoring force about the respective average position of the respective icon such that the position of the respective icon oscillates in a region substantially centered on the respective average position of the respective icon. In some embodiments, the respective icon rotates about the respective average position of the respective icon while maintaining a fixed orientation with respect to the touch-sensitive display. 
     In some embodiments, the method further includes: detecting a user making a point of contact with the touch-sensitive display at a first position corresponding to a first icon in the one or more icons and detecting movement of the point of contact to a second position of the touch-sensitive display; and responding to detecting the point of contact and detecting movement of the point of contact by displaying movement of the first icon to the second position of the touch-sensitive display, and displaying the first icon at the second position. 
     A second icon in the one or more icons may be moved from a respective initial position to a respective new position when the second position of the first icon at least partially overlaps with the respective initial position of the second icon. The position of the first icon may be fixed at the second position in response to detecting a second predefined user action, with respect to the touch-sensitive display, for terminating the predefined user interface reconfiguration process. 
     The aforementioned methods may be performed by a portable electronic device having a touch-sensitive display with a graphical user interface (GUI), one or more processors, memory and one or more modules, programs or sets of instructions stored in the memory for performing these methods. In some embodiments, the portable electronic device provides a plurality of functions, including wireless communication. 
     Instructions for performing the aforementioned methods may be included in a computer program product configured for execution by one or more processors. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       For a better understanding of the aforementioned embodiments of the invention as well as additional embodiments thereof, reference should be made to the Description of Embodiments below, in conjunction with the following drawings in which like reference numerals refer to corresponding parts throughout the figures. 
         FIG.  1    is a flow diagram of one embodiment of a position adjustment process for a portable electronic device. 
         FIG.  2 A  is an illustration of one embodiment of a portable electronic device responsive to touch input for adjustment of the position of one or more icons. 
         FIG.  2 B  is an illustration of one embodiment of a portable electronic device responsive to touch input for adjustment of the position of one or more icons. 
         FIG.  2 C  is an illustration of one embodiment of a portable electronic device responsive to touch input for adjustment of the position of one or more icons. 
         FIG.  2 D  is an illustration of one embodiment of a portable electronic device responsive to touch input for adjustment of the position of one or more icons. 
         FIG.  2 E  is an illustration of one embodiment of a portable electronic device responsive to touch input for adjustment of the position of one or more icons. 
         FIG.  3 A  is an illustration of one embodiment of a portable electronic device responsive to touch input for adjustment of the position of one or more icons. 
         FIG.  3 B  is an illustration of one embodiment of a portable electronic device responsive to touch input for adjustment of the position of one or more icons. 
         FIG.  4    is a block diagram of one embodiment of a portable electronic device. 
     
    
    
     DESCRIPTION OF EMBODIMENTS 
     Reference will now be made in detail to embodiments, examples of which are illustrated in the accompanying drawings. In the following detailed description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. However, it will be apparent to one of ordinary skill in the art that the present invention may be practiced without these specific details. In other instances, well-known methods, procedures, components, and circuits have not been described in detail so as not to unnecessarily obscure aspects of the embodiments. 
     Overview of the Interface Reconfiguration Mode 
     Attention is directed towards embodiments of portable electronic devices, including portable communications devices, that have graphical user interfaces (GUIs). The portable devices include an interface reconfiguration mode. In response to a user initiating the interface reconfiguration mode, positions of one or more icons displayed on the portable device may be varied about respective average positions. The varying of the positions of the one or more icons may include animating the one or more icons to simulate floating of the one or more icons on a surface corresponding to a surface of a display in the portable device. The display may be a touch-sensitive display, which responds to physical contact by a stylus or one or more fingers at one or more contact points. While the following embodiments may be equally applied to other types of displays, a touch-sensitive display is used as an illustrative example. 
     The varying of the positions of the one or more icons may intuitively indicate to the user that the positions of the one or more icons may be reconfigured by the user. The user may modify, adapt and/or reconfigure the positions of the one or more icons. In embodiments where the portable device includes a touch-sensitive display, the user may make contact with the touch-sensitive display proximate to a respective icon at a first position. Upon making contact with the touch-sensitive display, the respective icon may cease varying its position. The user may drag the respective icon to a second position. Upon breaking contact with the touch-sensitive display, the respective icon may resume varying its position. In some embodiments, the respective icon can be “thrown,” so that the final position of the respective icon is different from the point at which the icon is released. In this embodiment, the final position can depend on a variety of factors, such as the speed of the “throw,” the parameters used in a simulated equation of motion for the “throw” (e.g., coefficient of friction), and/or the presence of a lay out grid with simulated attractive forces. In some embodiments, the display may include two regions. During the interface reconfiguration mode, positions of one or more icons displayed in the first region may be varied while positions of one or more icons displayed in the second region may be stationary. 
     The user may similarly modify, adapt and/or reconfigure the positions of additional icons during the interface reconfiguration mode. When the user has completed these changes (at least for the time being), he or she may terminate the interface reconfiguration mode. In response to this user action, the portable device may return to a normal mode of operation and the varying of the displayed positions of the one or more icons will cease. 
     The user may initiate or terminate the interface reconfiguration process by selecting one or more appropriate physical buttons on the portable device, by a gesture (such as making contact and swiping one or more fingers across the touch-sensitive display or making contact and holding for more than a predefined time period) and/or by selecting one or more soft buttons (such as one or more icons that are displayed on the touch-sensitive display). As used herein, a gesture is a motion of the object/appendage making contact with the touch screen display surface. In some embodiments, the interface reconfiguration process terminates a pre-defined time after the interface reconfiguration process is initiated, i.e., there is a time out. 
     The one or more icons displayed on the portable device may be graphical objects. In some embodiments, the one or more icons may be widgets, which are combinations of states and procedures that constitute on-screen representations of controls that may be manipulated by the user, such as bars, buttons and text boxes. In an exemplary embodiment, the one or more icons correspond to application programs (email, browser, address book, etc.) that may be selected by the user by contacting the touch-sensitive display proximate to an icon of interest. 
       FIG.  1    is a flow diagram of one embodiment of a position adjustment process  100  for a portable electronic device. While the position adjustment process  100  described below includes a number of operations that appear to occur in a specific order, it should be apparent that the process  100  can include more or fewer operations, which can be executed serially or in parallel (e.g., using parallel processors or a multi-threading environment), an order of two or more operations may be changed and/or two or more operations may be combined into a single operation. 
     In the position adjustment process  100 , a plurality of icons are displayed in a GUI in a touch-sensitive display ( 110 ). A first predefined user action that initiates an interface reconfiguration process is detected ( 112 ). Exemplary predefined user actions include selecting a physical button on the portable device, making a predefined gesture on the touch screen display surface, or selecting a soft button. Position(s) of one or more of the plurality of displayed icons are varied ( 114 ). A point of contact with the touch-sensitive display at a first position of a respective icon is detected ( 116 ). Movement of the point of contact to a second position is detected ( 118 ). Movement of the respective icon to the second position is displayed and the respective icon is displayed at the second position ( 120 ). 
     If a second predefined user action that terminates the interface reconfiguration process is detected ( 122 —yes), the position(s) of the one or more icons is fixed ( 124 ). Exemplary predefined user actions include selecting or deselecting a physical button on the portable device, making another predefined gesture on the touch screen display surface, or selecting or deselecting a soft button. The fixed position(s) may correspond to a respective average position(s) for the one or more icons. If a second pre-defined user action that terminates the interface reconfiguration process is not detected ( 122 —no), the process may continue when a point of contact proximate to the same or another icon is detected ( 116 ). 
       FIG.  2 A  is an illustration of one embodiment of a portable electronic device  200  responsive to touch input for adjustment of the position of one or more icons. The portable electronic device  200  includes a touch-sensitive display with a GUI  210 . The display surface is transparent to allow various graphical objects to be displayed to the user (e.g., widgets). In some embodiments, the GUI  210  is divided into multiple sections or windows. For example, a region  212  of GUI  210  may include a tray  216  for holding icons or graphical objects  222  representing functions that are frequently used by the user (e.g., video, weather, schedule, game, music, etc.) and a tray  214  for holding icons or graphical objects  220  representing functions that are used less frequently by the user (e.g., mail, address book, browser, etc.). The GUI  210  may also include graphical objects corresponding to high-level functions of the portable electronic device  200 . For example, various objects and/or images may be presented and changed in GUI  210  by pressing a menu button  240 . In embodiments that include a mobile phone, dedicated graphical objects can be presented in GUI  210  representing traditional voice and data service operations (e.g., hold, clear, etc.). 
     The user may interact with the portable communications device  200  by making contact with the display surface with GUI  210  using a stylus, a finger  218  (not drawn to scale in  FIG.  2   ) or more than one finger. For example, the user may make contact with the display surface at a position of one of the icons  222  (direct contact), thereby activating the function or application program corresponding to that icon. In some embodiments, the icon  222  is activated when the user makes contact at the position of the icon and then breaks contact (for example, a tapping gesture). In some embodiments, the contact with the display surface used to activate the icon may not be at the position of the icon  222 . Instead, contact may be proximate to the icon  222  (indirect contact). The latter technique is similar to “hot spots” used with Web pages and other computer user interfaces. 
       FIGS.  2 B-D  show the portable electronic device  200  during the interface reconfiguration mode. After the interface reconfiguration mode is initiated, the display of one or more of the icons  222  in the tray  216  is modified from the previous stationary positions to time-varying positions. As noted previously, the display may include animating one or more of the icons  222  to simulate floating of one or more of the icons  222  on a surface corresponding to the display surface. For example, the animated varying of the positions of one or more of the icons  222  during the interface reconfiguration mode may resemble that of a hockey puck in an air hockey game. The displayed position(s) of a respective icon in the icons  222  may be varied in a region  224  centered on the average position of the respective icon. 
     While  FIG.  2 B- 2 D  illustrates movement of one or more of the icons  222  in the tray  216 , in other embodiments positions of one or more of the icons  220  in another region of GUI  210 , such as tray  214 , may be varied separately or in addition to those of one or more of the icons  222  in tray  216 . 
     The time-varying position(s) of one or more of the icons  222  intuitively indicate to the user that the positions of one or more of the icons  222  may be modified. This is illustrated in  FIGS.  2 C-D , which show the portable electronic device  200  during the interface reconfiguration mode. The user makes contact, either direct or indirect, with one of the icons that is moving at a position  226  and moves the point of contact across the display surface with GUI  210 . The contact and the motion are detected by the portable electronic device  200 . As a consequence, the displayed icon, in this example corresponding to a game, is moved accordingly. 
     As shown in  FIG.  2 D , the user moves the game icon to position  228  and breaks contact with the display surface. The game icon is now displayed at the position  228 . While the displayed position of the game icon is shown as stationary in  FIG.  2 D , in some embodiments the position of the game icon may be varied once the user breaks contact with the display surface. In some embodiments, only icons displayed in one or more subsections of the GUI  210  are displayed with a varying position during the interface reconfiguration mode. Thus, if the game icon had been dragged to another position in the tray  216 , it may be displayed with a varying position after the user breaks contact with the display. In some embodiments, the device may provide audio and/or tactile feedback when an icon is moved to a new position, such as an audible chime and/or a vibration. 
       FIG.  2 D  also illustrates the optional displacement of the browser icon to position  230 . The browser icon was displaced from its initial position  228  to its new position  230  due to at least partial overlap with the game icon, i.e., when the portable electronic device  200  determined that the user positioned the game icon over the browser icon, the displayed position of the browser icon was changed. 
     In other embodiments, an icon may be evicted or removed from the tray  214  when an additional icon, such as the music icon, is added to the tray  214 . For example, the tray  214  may be configured to accommodate a finite number of icons, such as 4 icons. If an additional icon is added to the tray  214 , a nearest icon to the additional icon or an icon that at least partially overlaps the additional icon may be evicted or removed from the tray  214 . In some embodiments, the evicted icon floats or zooms from its position in tray  214  to a new position in tray  216 , where it may join a sorted list of icons. In some embodiments, if the eviction process is not completed (e.g., the additional icon is not added to tray  214 ), the evicted icon may halt its progress towards its new position in tray  216  and return to its position in tray  214 . 
       FIG.  2 E  illustrates the portable electronic device  200  after the interface reconfiguration mode has been terminated or has terminated (due to a time out). The icons in GUI  210  have stationary positions. The game icon and the browser icon arc displayed in their new positions in the tray  214 . 
     The animated effects during the interface reconfiguration mode, such as the varying position(s) of one or more of the icons  222 , may be in accordance with corresponding equations of motion for one or more of the icons in a plane substantially coincident with the display surface with GUI  210 . The equations of motion may have a coefficient of friction less than a threshold allowing the simulation and/or animation of floating or sliding of one or more of the icons. The equation of motion for the respective icon may have a non-zero initial velocity, a non-zero angular velocity, and/or a restoring force about the respective average position of the respective icon such that the position of the respective icon oscillates in the region  224  ( FIG.  2 D ) substantially centered on the respective average position of the respective icon. 
     In some embodiments, the position of the respective icon may be varied during the interface reconfiguration mode in such a way that the respective icon rotates about the respective average position of the respective icon while maintaining a fixed orientation with respect to the GUI  210  and the portable electronic device  200 . This is illustrated in  FIGS.  3 A and  3 B , which show the portable electronic device  200  during the interface reconfiguration mode. In this example, the position of the video icon  222  in tray  216  is varied in such a way that it maintains a fixed orientation in region  224 . This may make it easier for the user to determine the function of the respective icon during the interface reconfiguration mode. 
     Portable Electronic Device Architecture 
     Attention is now directed towards embodiments of the portable electronic device architecture.  FIG.  4    is a block diagram of one embodiment of portable electronic device. A portable electronic device  400  generally includes one or more computer-readable mediums  402 , a processing system  404 , an Input/Output (I/O) subsystem  406 , radio frequency (RF) circuitry  408  and audio circuitry  410 . These components may be coupled by one or more communication buses or signal lines  403 . The device  400  can be any portable electronic device, including but not limited to a handheld computer, a tablet computer, a mobile phone, a media player, personal digital assistant (PDA) and the like, including a combination of two or more of these items. 
     It should be apparent that the architecture shown in  FIG.  4    is only one example of an architecture for the portable electronic device  400 , and that the device  400  could have more or fewer components than shown, or a different configuration of components. The various components shown in  FIG.  4    can be implemented in hardware, software, or a combination of both hardware and software, including one or more signal processing and/or application specific integrated circuits. The RF circuitry  408  is used to send and receive information over a wireless link or network to one or more other devices and includes well-known circuitry for performing this function, including but not limited to an antenna system, an RF transceiver, one or more amplifiers, a tuner, one or more oscillators, a digital signal processor, a CODEC chipset, memory, etc. In some embodiments, the RF circuitry  408  is capable of establishing and maintaining communications with other devices using one or more communications protocols, including but not limited to time division multiple access (TDMA), code division multiple access (CDMA), global system for mobile communications (GSM), Enhanced Data GSM Environment (EDGE), wideband code division multiple access (W-CDMA), Wi-Fi (such as IEEE 802.11a, IEEE 802.11b, IEEE 802.11g and/or IEEE 802.11n), Bluetooth, Wi-MAX, voice over Internet Protocol (VoIP), a protocol for email, instant messaging, and/or a short message service (SMS), or any other suitable communication protocol, including communication protocols not yet developed as of the filing date of this document. 
     The RF circuitry  408  and the audio circuitry  410  are coupled to the processing system  404  via the peripherals interface  416 . The interface  416  includes various known components for establishing and maintaining communication between peripherals and the processing system  404 . The audio circuitry  410  is coupled to an audio speaker  450  and a microphone  452  and includes known circuitry for processing voice signals received from interface  416  to enable a user to communicate in real-time with other users. In some embodiments, the audio circuitry  410  includes a headphone jack (not shown). Voice and data information received by the RF circuitry  408  and the audio circuitry  410  (e.g., in speech recognition or voice command applications) is sent to one or more processors  418  via the peripherals interface  416 . The one or more processors  418  are configurable to process various data formats for one or more applications programs  430  stored on the medium  402 . 
     Note that the term “data” includes but is not limited to text, graphics, Web pages, JAVA applets, widgets, emails, instant messages, voice, digital images or video, widgets, MP3s, etc., which can be used by one or more applications programs  430  stored on the medium  402  (e.g., Web browser, email, etc.). In some embodiments, the device  400  is capable of uploading and downloading various data from the Internet over a wireless network or an external port  436 , such as files, songs, digital images, videos, emails, widgets, instant messages and the like. 
     The peripherals interface  416  couples the input and output peripherals of the device to the processor  418  and the computer-readable medium  402 . The one or more processors  418  communicate with the one or more computer-readable mediums  402  via a controller  420 . The computer-readable medium  402  can be any device or medium that can store code and/or data for use by the one or more processors  418 . The medium  402  can include a memory hierarchy, including but not limited to cache, main memory and secondary memory. The memory hierarchy can be implemented using any combination of RAM (e.g., SRAM, DRAM, DDRAM), ROM, FLASH, magnetic and/or optical storage devices, such as disk drives, magnetic tape, CDs (compact disks) and DVDs (digital video discs). The medium  402  may also include a transmission medium for carrying information-bearing signals indicative of computer instructions or data (with or without a carrier wave upon which the signals are modulated). For example, the transmission medium may include a communications network, including but not limited to the Internet (also referred to as the World Wide Web), intranet(s), Local Area Networks (LANs), Wide Local Area Networks (WLANs), Storage Area Networks (SANs), Metropolitan Area Networks (MAN) and the like. 
     The one or more processors  418  run various software components stored in the medium  402  to perform various functions for the device  400 . In some embodiments, the software components include an operating system  422 , a communication module (or set of instructions)  424 , a contact/motion module (or set of instructions)  426 , a graphics module (or set of instructions)  428 , one or more applications (or set of instructions)  430 , a timer module (or set of instructions)  438  and a reconfiguration module (or set of instructions)  440 . 
     The operating system  422  (e.g., Darwin, RTXC, LINUX, UNIX, OS X, WINDOWS, or an embedded operating system such as VxWorks) includes various procedures, sets of instructions, software components and/or drivers for controlling and managing general system tasks (e.g., memory management, storage device control, power management, etc.) and facilitates communication between various hardware and software components. 
     The communication module  424  facilitates communication with other devices over one or more external ports  436  or via RF circuitry  408  and includes various software components for handling data received from the RF circuitry  408  and/or the external port  436 . The external port  436  (e.g., USB, FireWire™, etc.) is adapted for coupling directly to other devices or indirectly over a network (e.g., the Internet, wireless LAN, etc.). 
     The graphics module  428  includes various known software components for rendering, animating and displaying graphical objects on a display surface of a touch-sensitive display system  412 . Note that the term “graphical object” includes any object that can be displayed to a user, including without limitation text, web pages, icons, digital images, animations and the like. 
     The one or more applications  430  can include any applications installed on the device  400 , including without limitation, a browser, address book, contact list, email, instant messaging, word processing, keyboard emulation, widgets, JAVA-enabled applications, encryption, digital rights management, voice recognition, voice replication, location determination capability (such as that provided by the global positioning system (GPS)), a music player (which plays back recorded music stored in one or more files, such as MP3 or AAC files), etc. 
     In some embodiments, the device  400  may include the functionality of an MP3 player, such as an iPod (trademark of Apple Computer, Inc.). The device  400  may, therefore, include a 36-pin connector that is compatible with the iPod. In some embodiments, the device  400  may include one or more optional optical sensors (not shown), such as CMOS or CCD image sensors, for use in imaging applications. 
     The contact/motion module  426  includes various software components for performing various tasks associated with the touch-sensitive display system  412 , as previously described with respect to the embodiments in  FIGS.  1 - 3   . 
     The timer module  438  is a software timer used with the interface reconfiguration process  100  ( FIG.  1   ). The timer module  438  can also be implemented in hardware. 
     The reconfiguration module  440  may include an icon effects module (or a set of instructions)  442 . The icon effects module  442  may include animation for the icons during the interface reconfiguration mode. In some embodiments, the icon effects module  442  may be included in the graphics module  428 . 
     The I/O subsystem  406  is coupled to the touch-sensitive display system  412  and one or more other physical control devices  414  (e.g., pushbuttons, switches, dials, LEDs, etc.) for controlling or performing various functions, such as power control, speaker volume control, ring tone loudness, keyboard input, scrolling, hold, menu, screen lock, clearing and ending communications and the like. The touch-sensitive display  412  communicates with the processing system  404  via the touch sensitive screen controller  432 , which includes various components for processing user input (e.g., scanning hardware). The one or more other input controllers  434  receives/sends electrical signals from/to the other input or control devices  414 . The other input/control devices  414  may include physical buttons (e.g., push buttons, rocker buttons, etc.), dials, slider switches, sticks, and so forth. 
     The touch-sensitive display  412  displays visual output to the user in a GUI. The visual output may include text, graphics, video, and any combination thereof. Some or all of the visual output may correspond to user-interface objects. The touch-sensitive display  412  may also accept input from the user based on haptic and/or tactile contact. The touch-sensitive display  412  forms a touch-sensitive surface that accepts user input. The touch-sensitive display  412  and the touch screen controller  432  (along with any associated modules and/or sets of instructions in the medium  402 ) detects contact (and any movement or release of the contact) on the touch-sensitive display  412  and converts the detected contact into interaction with user-interface objects, such as one or more soft keys, that are displayed on the touch screen when the contact occurs. In an exemplary embodiment, a point of contact between the touch-sensitive display  412  and the user corresponds to one or more digits of the user. The touch-sensitive display  412  may use LCD (liquid crystal display) technology, or LPD (light emitting polymer display) technology, although other display technologies may be used in other embodiments. The touch-sensitive display  412  and touch screen controller  432  may detect contact and any movement or release thereof using any of a plurality of touch sensitivity technologies, including but not limited to capacitive, resistive, infrared, and surface acoustic wave technologies, as well as other proximity sensor arrays or other elements for determining one or more points of contact with the touch-sensitive display  412 . 
     The touch-sensitive display may be analogous to the multi-touch sensitive tablets described in the following U.S. Pat. No. 6,323,846 (Westerman et al.), U.S. Pat. No. 6,570,557 (Westerman et al.), and/or U.S. Pat. No. 6,677,932 (Westerman), and/or U.S. Patent Publication 2002/0015024A1, each of which is hereby incorporated by reference. However, the touch screen  126  displays visual output from the portable device, whereas touch sensitive tablets do not provide visual output. The touch-sensitive display  412  may have a resolution in excess of 100 dpi. In an exemplary embodiment, the touch-sensitive display  412  may have a resolution of approximately 168 dpi. The user may make contact with the touch-sensitive display  412  using any suitable object or appendage, such as a stylus, pen, finger, and so forth. 
     In some embodiments, in addition to the touch screen, the device  400  may include a touchpad (not shown) for activating or deactivating particular functions. In some embodiments, the touchpad is a touch-sensitive area of the device that, unlike the touch screen, does not display visual output. The touchpad may be a touch-sensitive surface that is separate from the touch-sensitive display  412  or an extension of the touch-sensitive surface formed by the touch-sensitive display  412 . 
     The device  400  also includes a power system  444  for powering the various hardware components. The power system  444  can include a power management system, one or more power sources (e.g., battery, alternating current (AC)), a recharging system, a power failure detection circuit, a power converter or inverter, a power status indicator (e.g., a light emitting diode (LED)) and any other components typically associated with the generation, management and distribution of power in portable devices. 
     In some embodiments, the peripherals interface  416 , the one or more processors  418 , and the memory controller  420  may be implemented on a single chip, such as the processing system  404 . In some other embodiments, they may be implemented on separate chips. 
     The foregoing descriptions of specific embodiments of the present invention are presented for purposes of illustration and description. They are not intended to be exhaustive or to limit the invention to the precise forms disclosed. Rather, it should be appreciated that many modifications and variations are possible in view of the above teachings. The embodiments were chosen and described in order to best explain the principles of the invention and its practical applications, to thereby enable others skilled in the art to best utilize the invention and various embodiments with various modifications as are suited to the particular use contemplated.