Patent Publication Number: US-2016224302-A1

Title: Method and system for device display screen transition related to device power monitoring

Description:
TECHNICAL FIELD 
     Examples described herein relate to a system and method for operating a computing device equipped with dual display screens and transitioning operation there between. 
     BACKGROUND 
     An electronic personal display is a mobile computing device that displays information to a user. While an electronic personal display may be capable of many of the functions of a personal computer, a user can typically interact directly with an electronic personal display without the use of a keyboard that is separate from, or coupled to, but distinct from the electronic personal display itself. Some examples of electronic personal displays include mobile digital devices/tablet computers and electronic readers (e-readers) such (e.g., Apple iPad®, Microsoft® Surface™, Samsung Galaxy Tab® and the like), handheld multimedia smartphones (e.g., Apple iPhone®, Samsung Galaxy S®, and the like), and handheld electronic readers (e.g., Amazon Kindle®, Barnes and Noble Nook®, Kobo Aura HD, Kobo Aura H2O, Kobo GLO and the like). 
     Some electronic personal display devices are purpose built devices designed to perform especially well at displaying digitally stored content for reading or viewing thereon. For example, a purpose build device may include a display that reduces glare, performs well in high lighting conditions, and/or mimics the look of text as presented via actual discrete pages of paper. While such purpose built devices may excel at displaying content for a user to read, they may also perform other functions, such as displaying images, emitting audio, recording audio, and web surfing, among others. 
     Electronic personal display devices are among numerous kinds of consumer devices that can receive services and utilize resources across a network service. Such devices can operate applications or provide other functionality that links a device to a particular account of a specific service. For example, the electronic reader (c-reader) devices typically link to an online bookstore, and media playback devices often include applications that enable the user to access an online media electronic library (or e-library). In this context, the user accounts can enable the user to receive the full benefit and functionality of the device. 
     Yet further, such devices may incorporate a touch screen display having integrated touch sensors and touch sensing functionality, whereby user input commands via touch-based gestures are received thereon. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       The accompanying drawings, which are incorporated in and form a part of this specification, illustrate various embodiments and, together with the Description of Embodiments, serve to explain principles discussed below. The drawings referred to in this brief description of the drawings should not be understood as being drawn to scale unless specifically noted. 
         FIG. 1  illustrates a computing device configured with dual display screens, and operation in transitioning between the screens, in an embodiment. 
         FIG. 2  illustrates a schematic architecture of a computing device configured with dual display screens, and operation in transitioning between the screens, according to an embodiment. 
         FIG. 3  illustrates an example embodiment in an alternate view of a computing device for operation related to transitioning between display screens. 
         FIG. 4  illustrates a method for operating a computing device to transition between dual display screens, according to an embodiment. 
     
    
    
     DETAILED DESCRIPTION 
     “E-books” are a form of electronic publication content stored in digital format in a computer non-transitory memory, viewable on a computing device having display functionality. An e-book can correspond to, or mimic, the paginated format of a printed publication for viewing, such as provided by printed literary works (e.g., novels) and periodicals (e.g., magazines, comic books, journals, etc.). Optionally, some e-books may have chapter designations, as well as content that corresponds to graphics or images (e.g., such as in the case of magazines or comic books). Multi-function devices, such as cellular-telephony or messaging devices, can utilize specialized applications (e.g., specialized c-reading application software) to view c-books in a format that mimics the paginated printed publication. Still further, some devices (sometimes labeled as “e-readers”) can display digitally-stored content in a more reading-centric manner, while also providing, via a user input interface, the ability to manipulate that content for viewing, such as via discrete pages arranged sequentially (that is, pagination) corresponding to an intended or natural reading progression, or flow, of the content therein. 
     An “e-reading device”, variously referred to herein as an electronic personal display or mobile computing device, can refer to any computing device that can display or otherwise render an e-book. By way of example, an e-reading device can include a mobile computing device on which an e-reading application can be executed to render content that includes e-books (e.g., comic books, magazines, etc.). Such mobile computing devices can include, for example, a multi-functional computing device for cellular telephony/messaging (e.g., feature phone or smart phone), a tablet computer device, an ultra-mobile computing device, or a wearable computing device with a form factor of a wearable accessory device (e.g., smart watch or bracelet, glass-wear integrated with a computing device, etc.). As another example, an e-reading device can include an e-reader device, such as a purpose-built device that is optimized for an e-reading experience (e.g., with e-Ink displays). 
     While engaged in an immersive e-reading experience, a combination of factors such as ambient lighting brightness, reflection and glare from the display screen while viewing displayed content may significantly affect reading comfort and enjoyment of the user&#39;s reading experience. A user should ideally be able to read comfortably for extended periods of time on the device display screen, to provide a digital reading experience that is comparable to the natural convenience of reading a physical paper book. It would be further preferable that a display screen consume relatively minimal device battery power, to enable reading for lengthy, immersive periods without having to recharge the device battery. 
       FIG. 1  illustrates a computing mobile device  110 , in one embodiment configured for operation of a primary display screen  116  and a secondary display screen  117 . In the example of  FIG. 1 , computing device  110  comprises an electronic personal display device, shown by way of example as e-reading device  110 . The terms e-reading device, computing device and electronic personal display device are used interchangeably herein. 
     The e-reading device  110  can correspond to any electronic personal display device on which applications and application resources (e.g., e-books, media files, documents) can be rendered and consumed. For example, the e-reading device  110  can correspond to a tablet or a telephony/messaging device (e.g., smart phone). In one implementation, for example, e-reading device  110  can run an e-reader application that links the device to a network service and enables e-books provided through the service to be downloaded and stored, for consumption by way of e-reading. In another implementation, the e-reading device  110  can run a media playback or streaming application that receives files or streaming data from the network service. By way of example, the e-reading device  110  can be equipped with hardware and software to optimize certain application activities, such as reading electronic content (e.g., e-books). For example, the e-reading device  110  can have a tablet-like form factor, although variations are possible. In some cases, display screen  116  of e-reading device  110  may be a liquid crystal display and display screen  117  may be an e-ink display or bi-stable display. 
     In additional detail, such a network service can include a content store server and a user account electronic library (e-library) storing e-books or digital content items. In some embodiments, the content store server and user account e-library may be implemented via server computing devices, as well as a server cloud computing system. The content store server may be an online store for purchasing of digital content items for download therefrom onto a resident memory of e-reading device  110  and/or the user account e-library which associates the e-reading device  110  with a user having an account. The user account can also be associated with ownership of, and/or accessibility to, one or more e-books and digital content items stored in content store server. 
     Further with reference to an example depiction of  FIG. 1 , the display screens  116 ,  117  may be touch-sensitive, to process touch inputs including gestures, e.g., a swipe gesture comprising a sustained touch while moving along a particular direction upon the touchscreen surface). For example, the display screens  116 ,  117  may be integrated with one or more touch sensors to provide a touch-sensing region on their respective display surfaces. For some embodiments, the one or more touch sensors may include capacitive sensors that can sense or detect a human body&#39;s capacitance as input. In the example of  FIG. 1 , the touch-sensing region coincides with a substantial surface area, if not all, of the display screens  116 ,  117  respectively. 
     In some embodiments, the e-reading device  110  includes features for providing functionality related to displaying paginated content. The e-reading device  110  can include battery power monitoring logic  115 , which may be a combination of hardware components and software logic that tracks a charging progress and a depletion progress of battery power of device  110 . 
     According to some embodiments, the e-reading device  110  includes display sensor logic to detect and interpret user input or user input commands made through interaction with the touch sensors of display screens  116 ,  117 . By way of example, display sensor logic can detect a user making contact with the touch-sensing region of the display screens  116 ,  117 , otherwise referred to herein as a touch event. More specifically, display sensor logic can detect a touch event also referred to herein as a tap, an initial tap held in contact at display screens  116 ,  117  for longer than some pre-defined threshold duration of time (otherwise known as a “long press” or a “long touch”), multiple taps performed either sequentially or generally simultaneously, swiping gesture actions made through user interaction with the touch sensing region of the display screens  116 ,  117  or any combination of these gesture actions. Although referred to herein as a “touch” or a tap, it should be appreciated that in some design implementations, sufficient proximity to the screen surface, just short of actual physical contact, may register a “contact” or a “touch event”. Furthermore, display sensor logic can interpret such interactions in a variety of ways. For example, each such interaction may be interpreted as a particular type of user input associated with a respective input command, execution of which may trigger a change in state at touchscreen displays  116 ,  117 . 
     Display screen transition logic module  120  provides, in an embodiment, for activation and transitioning of operation between touchscreen displays  116 ,  117  of personal display device  110 . Display screen transition logic module  120  includes logic providing, in part, to accomplish activation of, and transitioning operation between, activation and operation of touchscreen displays  116 ,  117  based on an electronic battery power depletion of device  110  during continuous or continual) operation of device  110  that is interpreted by a processor of display device  110  as having reached a predetermined threshold level. 
     Display screen transition logic module  120  and battery power monitoring module  115  can be implemented as software modules comprising instructions stored in a memory of a computing device such as the content store server and/or display device  110 . One or more embodiments of display screen transition logic module  120  and/or battery power monitoring module  115  described herein may be implemented using programmatic modules or components. A programmatic module or component may include a program, a subroutine, a portion of a program, or a software or a hardware component capable of performing one or more stated tasks or functions in conjunction with one or more processors. As used herein, a module or component can exist on a hardware component independently of other modules or components. Alternatively, a module or component can be a shared element or process of other modules, programs and hardware components. 
     Furthermore, the one or more embodiments of display screen transition logic module  120  and battery power monitoring module  115  described herein may be implemented through instructions that are executable by one or more processors. These instructions may be stored on a computer-readable non-transitory medium. In particular, the numerous computing and communication devices shown with embodiments of the invention include processor(s) and various forms of computer memory, including volatile and non-volatile forms, storing data and instructions. Examples of computer-readable mediums include permanent memory storage devices, such as hard drives on personal computers or servers. Other examples of computer storage mediums include portable storage units, flash or solid-state memory (such as included on many cell phones and consumer electronic devices) and magnetic memory. Computers, terminals, network enabled devices (e.g., mobile devices such as cell phones and wearable computers) are all examples of machines and devices that utilize processors, memory, and instructions stored on computer-readable mediums. Additionally, embodiments may be implemented in the form of computer-programs, or a computer usable storage medium capable of storing such a program. 
     With reference now to  FIG. 2 , illustrated is a schematic architecture of a mobile computing device, such as a tablet or e-reader, configured for transition operation between dual display screens  116 ,  117 , according to an embodiment. 
     E-reading device  110  further includes processor  210 , a memory  250  storing instructions and logic pertaining at least to display sensor logic, display screen transition logic module  120  and battery power monitoring module  115 . 
     Processor  210  can implement functionality using the logic and instructions stored in memory  250 . Additionally, in some implementations, processor  210  communicates with the network service. More specifically, the e-reading device  110  can access the network service to receive various kinds of resources (e.g., digital content items such as e-books, configuration files, account information), as well as to provide information (e.g., user account information, service requests etc.). For example, e-reading device  110  can receive application resources, such as e-books or media files, that the user elects to purchase or otherwise download via the network service  121 . The application resources, including e-books having content organized as a series of digitally constructed pages, that are downloaded onto the e-reading device  110  can be stored in memory  250 . 
     In some implementations, primary display screen  116  can correspond to, for example, a liquid crystal display (LCD) or light emitting diode (LED) display that illuminates in order to provide content generated from processor  210 . In some implementations, display  116  can be touch-sensitive. For example, in some embodiments, one or more of the touch sensor components may be integrated with display  116 . In other embodiments, the touch sensor components may be provided (e.g., as a layer) above or below display  116  such that individual touch sensor components track different regions of display  116 . 
     Secondary display  117  can correspond to an electronic paper type display, such as an e-ink or bi-stable display that mimic conventional paper in the manner in which content is displayed. Typically, e-ink displays are more suited to e-reading under extreme ambient lighting conditions, such as very bright daylight or in near-darkness at bedtime, for long, immersive periods, resulting is less eye strain as compared to reading, for example, on an LCD display screen. Examples of such electronic paper display technologies include electrophoretic displays, electro-wetting displays, and electro-fluidic displays. Secondary display  117  can also be touch-sensitive; for example, in some embodiments, one or more of the touch sensor components may be integrated with display  117 , providing touch screen capability. Yet further, e-ink displays embodied in secondary display  117  consume relatively very minimal device battery power in comparison with, for example, an LCD display used in primary display screen  116 . In some cases, e-ink displays consume computing device battery power at a less than 10 percent rate as compared to consumption of an LCD primary screen. For yet this additional reason, an e-ink screen as embodied in secondary display screen  117  would be very desirable for lengthy, immersive periods of reading e-book content via e-reading device  110 . 
     Processor  210  can receive input from various sources, including touch sensor components at displays  116 ,  117 , keystroke input  208  such as from a virtual or rendered keyboard, and other input mechanisms  299  (e.g., buttons, mouse, microphone, etc.). With reference to examples described herein, processor  210  can respond to input detected at the touch sensor components. In some embodiments, processor  210  responds to inputs from the touch sensor components in order to facilitate or enhance e-book activities such as generating e-book content on displays  116 ,  117 , performing page transitions of the displayed e-book content, powering off the device  110  and/or displays  116 ,  117 , activating a screen saver, launching or closing an application, and/or otherwise altering a state of displays  116 ,  117 . 
     In some embodiments, memory  250  may store display sensor logic that monitors for user interactions detected through the touch sensor components, and further processes the user interactions as a particular input or type of input. In an alternative embodiment, display sensor logic module may be integrated with the touch sensor components. For example, the touch sensor components can be provided as a modular component that includes integrated circuits or other hardware logic, and such resources can provide some or all of display sensor logic. In variations, some or all of display sensor logic may be implemented with processor  210  (which utilizes instructions stored in memory  250 ), or with an alternative processing resource. 
     E-reading device  110  further includes wireless connectivity subsystem  213 , comprising a wireless communication receiver, a transmitter, and associated components, such as one or more embedded or internal antenna elements, local oscillators, and a processing module such as a digital signal processor (DSP) (not shown). As will be apparent to those skilled in the field of communications, the particular design of wireless connectivity subsystem  213  depends on the communication network in which display device  110  is intended to operate, such as in accordance with Wi-Fi, Bluetooth, Near Field Communication (NFC) communication protocols, and the like. 
     Display screen transition logic module  120  can be implemented as a software module, comprising instructions stored in memory  250 , on mobile display device  110 . In one implementation, the local memory  250  can include records for each e-book in the user&#39;s e-library account. The user may have the content portion of select e-books archived remotely at a computer server cloud system, so as not to reside in the local memory  250 , but be provided by the network service upon request or as needed. 
     Battery power monitoring logic module  115  includes software and hardware components to monitor a battery power level, such as 100%, 80%, 40%, etc., of device  110  and operates in conjunction with display screen transition logic module to activate secondary display screen  117  upon detecting that a depletion of battery power of device  110  has reached a predetermined threshold level, for transitioning content of the e-book for viewing thereon. 
     Next, in reference to  FIG. 3 , depicted is an example embodiment in view  310  of an activated secondary display screen  1117  of computing device  110 . 
     In this case depicted, display screen  117  is disposed on a rear housing face of computing device  110 , oppositely located the front housing face that includes primary display screen  116 . Upon detecting, via battery power monitoring logic module  115 , that a battery power level of device  110  has depleted to reach a predetermined threshold power level, at 30% of full capacity for example in one embodiment, secondary display screen  117  may be activated via processor  210 , whereupon display of the e-book content is transitioned for displaying and reading upon secondary display screen  1117  of computing device  110 . 
     Although depicted in the embodiment of  FIG. 3  as integrally contained within device  110 , it is contemplated that secondary display screen  117  may be detachably coupled to device  110 , such as via an accessory device cover assembly containing secondary display screen  117 . In such configurations, secondary display screen  117  is electrically coupled to processor  210  of device  110  when attached thereto, whereupon processor  210  controls operation and deployment of secondary display screen  117 . In such alternate detachable embodiments, secondary display screen  117  may be incorporated into an accessory device cover that is foldable over the front display screen  116  or over a rear housing surface of device  110 . 
     Optionally, upon transitioning operation of e-reading device  110  for e-reading of e-book content on secondary display  117 , primary display screen  116  may be de-activated into a lower power mode, such as a sleep mode or power-off mode, for power conservation benefits, at least while rendering the e-book content via secondary display screen  117 . 
     Next with reference to  FIG. 4 , illustrated is a method for operation in deploying an alternate one of dual screens  116 ,  117  of computing device  110  depending on detecting a battery power level reaching a threshold battery power level, according to an embodiment. In describing the example of  FIG. 4 , reference will be made to components such as described with regard to  FIGS. 1 through 3  for purposes of illustrating components for performing a step or sub-step as described. 
     At step  401 , monitoring a device battery power level while displaying the digital content item at the primary touchscreen display  116  of computing device  110 . The digital content item may be such as an e-book having paginated content arranged in a sequence of digitally constructable pages. In alternate embodiments, the e-book may be an e-magazine or an e-comic book, wherein each of the digitally constructed pages includes several distinctive panels or frames of text and/or images, and reading progression within a page may include navigating in sequential steps from one such panel or frame to another within a same page. 
     At step  402 , in response to the monitoring, detecting that a threshold battery power level is reached. 
     At step  403 , transitioning operation of the computing device  110  to the secondary display screen  117  by rendering the digital content item for reading thereon. 
     Although illustrative embodiments have been described in detail herein with reference to the accompanying drawings, variations to specific embodiments and details are contemplated and encompassed by this disclosure. It is intended that the scope of embodiments described herein be defined by claims and their equivalents. Furthermore, it is contemplated that a particular feature described, either individually or as part of an embodiment, can be combined with other individually described features, or parts of other embodiments. Thus, absence of describing combinations should not preclude the inventor(s) from claiming rights to such combinations.