Abstract:
On a mobile electronic device, a user may manually or automatically select between a first user interface configured to persons having a left dominant hand (or simply operating the device with the left hand), and a second user interface configured to persons having a right dominant hand (or simply operating the device with the right hand).

Description:
[0001]    Method, System and Software for Ascertaining the Dominant and/or Presently Operating Hand of a User of a Mobile Electronic Device 
         [0002]    Method, System and Software for Displaying a User-Interface on a Mobile Electronic Device that is Configured Based on the Dominant and/or Presently Operating Hand of a User of the Device 
       BACKGROUND 
       [0003]    Each human has a dominant hand. For about 90% of the population, the dominant hand is the right hand. In the prior art, software interfaces for mobile electronic devices (“MED&#39;s”) such as smart phones, tablet computers, notebook computers, laptop computers, etc. were designed to emphasize various features, such as aesthetics, symmetry, and other characteristics. However, efforts were not made to tailor user interfaces to the dominant hand of the user or to optimize the user interface based on the certain hand operating the device. 
       SUMMARY 
       [0004]    A system, method and software are needed which determine the dominant and/or presently operating hand of a MED user and dynamically reconfigure the user interface of the MED to maximize convenience and usability for that dominant and/or presently operating hand. Numerous techniques can be utilized to determine, at the present time of use, the dominant and/or operating hand of a user, as described below. 
     
    
     
       BRIEF DESCRIPTION OF DRAWINGS 
         [0005]      FIG. 1  depicts a user operating an MED with his/her right hand. 
           [0006]      FIG. 2  depicts regions of buttons where a right dominant hand user (or simply a user operating the device with the right hand) may press the buttons. 
       
    
    
     DETAILED DESCRIPTION  
       [0007]    Referring to  FIG. 1  an example MED  101  is shown being used by a user who is right hand dominant or is presently operating the device with the right hand. The user has his/her right thumb  104  on the right side of the device display screen  102  adjacent buttons  103  which may be pressed when desired. The user&#39;s little finger  108  may be at the bottom of the device  101  to support it. The user&#39;s index finger and two other fingers  105 ,  106  and  107  are on the left side of the device, the side opposite the thumb or on the back of the device  104 . 
         [0008]    In its simplest manifestation, the invention includes two user interfaces. A first user interface is laid out for a right-hand dominant or right hand operating user. A second user interface is laid out for a left-hand dominant or left hand operating user. The two user interfaces may be mirror images of each other, or they may be distinctly arranged. A switch or button, implemented as a software switch or button or a hardware switch or button, may be used to select or switch between the first and second user interfaces, depending on the user&#39;s preference. Generally a user will find it more comfortable to press buttons on the MED screen that are relatively farther from the junction of the user&#39;s thumb and hand, and it is anticipated that the user interfaces will be arranged so that the most commonly used buttons will be farthest from the thumb-to-hand junction. The left/right switch or button could be simply clicked to switch between the two user interfaces, or the functionality of the interface could be dragged from one side of the screen to the other depending on location most preferred by user. 
         [0009]    In another embodiment of the invention, the software running on the MED will make a determination of which of the user&#39;s hands is the user&#39;s dominant and/or presently operating hand, and will then automatically optimize the user interface appropriately for that dominant and/or presently operating hand. 
         [0010]    The invention may also be used to dynamically and continuously track which hand the user is utilizing to operate a MED, switching between right hand and left hand user interfaces as the user switches the device from one hand to the other. It is also possible for the MED to permit a user to switch back to a prior user interface in the event the changed optimization does not suit the user. 
         [0011]    Several techniques can be used to determine the dominant and/or operating hand of a user. 
         [0012]    Accelerometer. An accelerometer is a device that can measure the force of acceleration, whether caused by gravity or by movement. An accelerometer can therefore measure the speed of movement of an object it is attached to. Because an accelerometer senses movement and gravity, it can also sense the angle at which the device is being held. By incorporating an accelerometer into an MED, the accelerometer can sense the tilt, movement and speed being applied to them, as well as the direction in relation to the MED&#39;s screen. Generally this allows the MED to adjust its visual output to make it appropriate to the direction of the screen. In this way you can view lists with the screen held vertically and watch videos with the screen held sideways or vice versa as desired. 
         [0013]    However, as applied to dominant and/or presently operating hand detection, the accelerometer can provide further information. Often, a user who is right hand dominant (or simply presently using the device in the right hand) will hold an MED with the lower left hand corner of the device slightly lower than the lower right hand corner. And a user who is left hand dominant (or simply presently using the device in the left hand) will hold an MED with the lower right hand corner of the device slightly lower than the lower left hand corner. By noting the relative positions of the lower left and right hand corners of the MED, it is possible to make a determination whether the user is operating the device in the right or left hand. Once this determination has been made, the device can automatically optimize the user interface accordingly for that particular user (right hand interface or left hand interface). 
         [0014]    Gravitometer. An accelerometer provides more information than is actually needed for dominant and/or operating hand detection. Therefore, a simple gravitometer can be substituted to determine whether the lower left hand corner of the MED or the lower right hand corner of the MED is more frequently in the lowest position, thus revealing the dominant and/or presently operating hand of the user. 
         [0015]    Button Push Location. When a user reaches for a button on a touch screen of a MED, it is common for the user to press either the lower part of the button or the area just below the button. It is also common for a right-handed (or right hand operating) user when attempting to touch a button on the left side of a touch screen to touch the right side of the button. And it is common for a left-handed (or left hand operating) user when attempting to touch a button on the right side of the screen to touch the left side of the button. It is common for a right-handed (or right hand operating) user when attempting to touch a button on the right side of the screen to touch the center of the button. And it is common for a left-handed (or left hand operating) user when attempting to touch a button on the left side of the screen to touch the center of the button. Therefore, by noting the location of a button on the screen and the region of the button where the user has touched it, dominant and/or presently operating hand of the user can be determined. Referring to  FIG. 2 , these principles are briefly illustrated. An MED  201  with display screen  202  is depicted. The screen has various buttons  203  and  204  on it. For each button, a region of likely strikes or button presses  205  and  206  are shown as would be expected for a right-handed (or right hand operating) user. 
         [0016]    Gyroscope. A gyroscope is a device for measuring device orientation. A gyroscope can be a mechanical or semiconductor device. By sensing orientation of an MED, a gyroscope can inform the software operating on the MED how to best optimize the interface based on which hand it detects is presently operating the device. 
         [0017]    Camera. When a user operates a MED one-handed, typically the user holds the MED in his or her dominant hand and uses the thumb of the dominant hand to press buttons on the screen of the MED. Thus, the thumb is the most active digit of the operating hand. By observing the activity of the thumb, and the side of the screen from which it originates, it is possible to make a determination of the dominant hand and/or presently operating hand of the MED user. If the thumb activity originates from the right hand side of an MED, then the user is right hand dominant and/or presently operating the device with the right hand, and the MED can automatically switch to a user interface appropriate for a right hand operating user. If the thumb activity originates from the left hand side of an MED, then the user is left hand dominant and/or presently operating the device with the left hand, and the MED can automatically switch to a user interface appropriate for a left hand operating user. The camera of an MED, if appropriately positioned, can be used to note the movement of a thumb from the right or left side of an MED screen to a button on the MED screen, thus determining dominant and/or presently operating hand of the user. 
         [0018]    Finger Presence. Often a user will hold an MED in his or her hand, with his or her thumb on one side of the MED and at least two to four of his or her remaining fingers on the other side back or bottom of the MED. Frequently the user&#39;s dominant or operating hand little finger will be at the bottom of the MED to support it. Thus, two to four fingers will be present along one side of the MED. Once the presence of those fingers is ascertained, the dominant and/or operating hand can be determined. For example, if the user has between two to four fingers along the left side of the MED, the user is right hand dominant (or simply operating the device with the right hand). And if the user has between two to four fingers along the right side of the MED, the user is left hand dominant (or simply operating the device with the left hand). 
         [0019]    The presence of fingers along one side or the other of the MED can be ascertained by several methods. One method is to use the touch screen to sense the presence of multiple fingers resting on one side of it or the other. That presence can be sensed by the slight pressure the fingers exert on the MED screen. Once that finger presence is sensed, the dominant and/or presently operating hand is known. Another method is to use the MED camera, if appropriately positioned, to observe the fingers resting on one side or the other of the MED. Again, once the position of the resting fingers has been observed, the dominant and/or operating hand is known. A third method is to sense the heat from the resting fingers. Once the side of the MED with multiple heat sources, i.e., fingers, has been determined, the dominant hand and/or presently operating hand is known. 
         [0020]    While the present invention has been described and illustrated in conjunction with a specific embodiment, those skilled in the art will appreciate that variations and modifications may be made without departing from the principles of the invention as herein illustrated, described, and claimed. The present invention may be embodied in other specific forms without departing from its spirit or essential characteristics. The described embodiment is to be considered in all respects as only illustrative, and not restrictive. The scope of the invention is, therefore, indicated by the appended claims, rather than by the foregoing description. All changes which come within the meaning and range of equivalency of the claims are to be embraced within their scope.