Adaptive user interface input device

[0001] The present invention relates generally to the field of user interfaces. The present invention relates more specifically to adaptive user interfaces.

[0002] Conventional information and communication systems can include for example a user input device for facilitating user input, a display device for displaying information, and a processor for receiving, managing, and processing the user input and information. Many modern applications have merged the functions of the input device and the display device to create an intuitive, easy-to-use user interface.

[0003] Graphical user interfaces have been developed in which the display device displays a series of icons or menus which a user selects or manipulates with the user input device to provide user input. For example, in some systems the user input device comprises a pointing mechanism such as a mouse or joystick that can be used to manipulate a pointer over the icons or menu items displayed on the display device. The user can select an icon or menu item by positioning the pointer over the input area associated with the icon or menu item and hitting a select key.

[0004] Another example of a graphical user interface are those that comprise a “touch screen” in which the user provides input by tapping or writing directly on the display device. Touch screens can display icons or menus or can display other input metaphors such as a keyboards or response buttons. The user can select a menu item, icon, keyboard key, or response button, for example, by tapping on the display device in the input area associated with the desired item, icon, key, or button. The displayed keyboard or button can enable the user to enter various pieces of information such as but not limited to telephone numbers, response to display commands, and menu selections.

[0005] Other devices can be equipped with handwriting recognition software which enables the user to write alphanumeric characters onto an input area with a stylus. Handwriting recognition software within the device then attempts to interpret and recognize alphanumeric characters drawn by the user with the stylus on the input area. Generally, the information that is input may be displayed on a graphical display, such as but not limited to a liquid crystal display (LCD). In addition, the graphical display may be used to display menus or various command prompts as well as other pieces of information, such as but not limited to numbers, names, messages, menu functions, settings, and other application information such as timers or altimeters. As such, the system may be used to interact with various pieces of information displayed on the graphical display.

[0006] Touch screen user interfaces can themselves be used to display graphical user interfaces. For example, such touch screens may take the form of a virtual keyboard displayed on a graphical display wherein a discrete input area of the display corresponds to each key of a keyboard functions via a touch screen mechanism. These touch screen user interfaces are designed to be more intuitive and easier to use in comparison to hardware input user interfaces.

[0007] One characteristic all of these input/display devices share is that the user interface input metaphor and means can be reconfigured to meet specific applications. Often times these user interfaces are employed in mobile devices such as mobile telephones or personal digital assistants. The display devices associated with mobile devices are typically relatively small in size, particularly when compared with the display devices of less mobile systems such as a personal computer. Due at least in part to this small size, however, in some situations the graphical display and/or touch interfaces can be difficult to use. Certain environmental conditions, such as motion or trembling, can further increase the ease-of-use and accuracy problems. Unfortunately, it has been difficult to combat the problems associated with a smaller size input device and the typical movement and environmental conditions often present when a mobile device, such as a mobile telephone or personal digital assistant is used. Although data and commands may be entered via the virtual keyboard, icon, menu, or handwriting recognition system, the entry speed is reduced, the discomfort level is increased, and the error rate greatly increased relative to having used a full sized keyboard or to operation of the keyboard or input device under normal conditions, i.e. no movement.

[0008] One such situation where graphical display touch interfaces are often difficult to use is where the user is in motion, such as where the user is walking and thus the graphical display itself is in motion. Another situation where the graphical display touch interface is difficult to utilize is where the user is sitting in a vehicle and thus the graphical display touch interface is vibrating or trembling. In such situations, the user often is unable to focus on the moving graphical display touch interface or is unable to actuate the graphical display touch interface for example via a stylus or the user's finger.

[0009] Thus, there is a need in the art for a user interface that combines display and input devices in an adaptable manner to address the problems associated with theses devices to achieve added benefits such as comfort and ease-of-use.

[0010] One embodiment of the invention relates to a user interface which is adaptable. The user interface is capable of responding to a stimulus detected via a sensor. One or more sensors capable of detecting one or more types of stimuli may be utilized in accordance with the principles of the present invention. In one embodiment, the user interface displays graphical metaphors such as icons, menu items, a virtual keyboard, and/or response buttons on a touch screen, wherein the metaphors' configuration and display characteristics such as size are altered in response to a stimulus such as motion.

[0011] Devices in accordance with the principles of the present invention include a user interface that is adaptable to stimulus. Devices made in accordance with the principles of the present invention may include but are not limited to mobile electronic devices such as mobile telephones and personal digital assistants.

[0021] One embodiment of the present invention relates to the use of an adaptable user interface that solves problems associated with the prior art by providing an interface that is comfortable and easy-to-use.

[0022] In order to provide these added benefits, a user interface in accordance with the principles of the present invention includes a means for situational awareness that can be used to adapt the user interface to the current environment. For example, a sensor may be used for sensing an environmental condition, such as motion, which causes the user interface to adapt, such as by increasing the user input area of the user interface to make it easier for the user to provide input while the device is trembling. The sensor can also be configured to sense when the device has stopped moving and/or trembling and the user interface can then be returned to a “normal” mode of operation.

[0023] Referring now to the accompanying drawings, FIG. 1 illustrates one possible application of an adaptable user interface according to the present invention. FIG. 1 illustrates an adaptable user interface 10 incorporated into a mobile telephone 12. The adaptable user interface 10 includes a display screen 14 and a pointer control device 16. The display screen 14 provides a graphical user interface by displaying icons 18, menus 20, lists, etc. which the user can select by manipulating the pointing device 16. In this case, the pointing device 16 comprises a joystick-type control for navigating a pointer over the desired item to be selected.

[0024] The mobile telephone 12 can include a sensor for sensing an environmental condition and a controller for adapting the user interface to a sensed environmental condition. The sensor may include, but is not limited to, one or more of any of the following accelerometers, motion detectors, vibration detectors, conductive spheres and combinations thereof. In some embodiments, the sensor comprises an array of sensors of various types. Physical sensors, logical sensors, or a combination thereof may be utilized. The sensors in accordance with the principles of the present invention can be capable of returning scalar, vector, or symbolic values (V_xt, where x represents the specific sensor's preassigned number and t represents time) from a set universe of possible values (the domain P of possible values). For example, a device in accordance with the principles of the present invention may comprises sensors capable of detecting whether the device is in motion.

[0025] Another possible sample universe of values (for illustrative purposes only and not to be interpreted as limiting the scope of the invention) in a systems using one sensor for detecting motion can include three possible outputs: either a 2 indicating an increase in the appropriate environment condition (i.e. motion), a 0 indicating a decrease, or a 1 indicating no change relative to the last time interval measured.

[0026]

TABLE 1
Sample Universe of Sensor Signals and Interface Responses
	Universe of Responses for time (T)
Motion	0	1 (No Change	2 (More
V1t	(Less Movement)	in Motion)	Movement)
OUTCOME	Adaptive State	Resting State	Adaptive State
	(Decrease	(No change to	(Increase
	response in user	user interface)	response in
	interface)		user interface)

[0027] The sensor may be part of a more complex architecture. For example, a user interface in accordance with the principles of the present invention may utilize hardware, such as sensors, as well as software, such as various applications, computer program products, or scripts, in combination to establish a current status as well as to interpret any changes to that status.

[0028] In some embodiments the user interface is utilized in a device having a global positioning system (GPS). The GPS is adapted to function as a motion sensor. For example, the GPS can output coordinates to a counter which is capable of determining from the changes in the global position of the device whether the device is in motion or at rest.

[0029] In some embodiments, a motion sensor is utilized which is capable of detecting vibrations. For example, a sensor may be used which comprises a conductive sphere disposed in a cylindrical housing and adapted to move within the cylindrical housing to detect motion. The cylindrical housing contains a multitude of circuits which are capable of being shorted when in contact with the conductive sphere.

[0030] In one embodiment, the user interface 10 adapts in response to a signal from the sensor. The user interface 10 may adapt by switching between different pre-established modes based upon the signal from the sensor. The pre-established modes can be preset or can be configured or reconfigured by the user. Such modes may include, but are not limited to, changes in the input area, re-arrangement of the display contents, changes in sensitivity of the pointer control device 16, or combinations thereof. For example, the user interface 10 may operate in a “normal mode” when motion or vibration is not sensed, and it may switch to a “mobile mode” adapting the user interface 10 to compensate for motion when motion is detected. The sensed “motion” can be in the form of actual motion, vibration, trembling, or any other movement of the mobile device.

[0031] Another possible application of an adaptable user interface input device is shown in FIG. 2. An adaptable user interface input device 10 according to the present invention can be incorporated into a personal digital assistant (PDA) or other mobile media device 22, such as a mobile electronic game device or mobile multi-function device such as the Nokia 7700 media device. In this embodiment, the adaptable user interface 10 includes a touch screen display 24. The touch screen display 24 provides a graphical user interface by displaying icons 18 (see also FIG. 3), menus 20 (see FIG. 4), lists 26 (see FIG. 5), a virtual keyboard 28 (see FIG. 6), response buttons 30 (see FIG. 5), and/or a handwriting recognition input area 32 (see FIG. 7), as well as various display control tools such as scroll bars 34, etc. A stylus 36 can be used to select or manipulate the items displayed on the tough screen display 24. In addition, a trackball pointing device 38 can be provided for manipulating a pointer on the touch screen display 24 as an alternative means of providing user input.

[0032] As with the previous embodiment, a sensor 38 (see FIG. 8) can be included for sensing an environmental condition, such as motion or trembling. The user interface 10 can than be adapted to accommodate for the sensed environmental condition as described above. For example, in the case of icons 18 as shown in FIG. 3, the size of each icon 18 can be increased thus increasing the user input area for each icon 18 on the touch screen display 24 in response to the sensor detecting motion or trembling. This will enable the user to more easily select an icon 18. In addition, the size of the display control tools, such as the scroll bar 34, can also be increased for ease-of-use. The same can be done for the menus 20 (FIG. 4), lists 26 and response buttons 30 (FIG. 5), virtual keyboard 28 keys (FIG. 6), and handwriting recognition input area 32 (FIG. 7).

[0033] Various other adaptations can also be made to increase accuracy and ease-of-use in response to sensed environmental conditions. For example, the touch screen display 24 sensitivity can be decreased when motion or trembling is sensed to reduce the number of inadvertent select commands caused by the user accidentally touching the stylus 36 to the touch screen display 24 due to accidental movement of the mobile media device 22. In addition, the items displayed on the touch screen display 24 can be rearranged in various different ways or even disabled and/or removed in order to accommodate various environmental conditions.

[0034] In one embodiment where a touch screen display 24 displays a virtual keyboard 28, the graphical display of the virtual keyboard 28 may be altered in response to a signal from the sensor 38. In one embodiment, where the mobile media device 22 includes an array of sensors, the keyboard 28 can be altered in various predetermined ways depending on the specific set of signals received at that time. For example, where an accelerometer and light sensor are used, the graphical display of the keyboard may be changed in response to a set of signals indicating motion and deceased light by increasing the user input area size of the keyboard keys and increasing the contrast and brightness of the display. In accordance with the principles of the present invention the keyboard 28 layout could be rearranged in response to certain stimuli. In addition, the content of the keyboard 28 could be altered such as by deleting the least frequently used keys or by altering the sensitivity of the touch screen display 24 itself. A time interval between user interface input adaptations can be incorporated into the device so that the user interface input does not change too often adversely affecting the ease-of-use of the device.

[0035] The sensor can include, for example but not limited to an accelerometer or an array of accelerometers capable of detecting motion in three dimensions as represented by a x, y, and z axis. In response to the appropriate stimulus, the sensors output a signal which is interpreted by the device as either requiring an adaptation in the user interface 10 or not. For example, the user interface 10 may be adapted in response to a signal indicating motion by reconfiguring the arrangement of the individual keys on the keyboard 28, increasing the size of the input area of each key, and/or decreasing the sensitivity of the touch screen display 24.

[0036] A block diagram illustrating one embodiment of a possible sensor architecture according to the present invention is shown in FIG. 8. FIG. 8 illustrates that multiple sensors 38 can be used for sensing various environmental conditions. The sensors 38 can be connected to a controller 40 which receives and processes signals from the sensors 38. The controller 40 is connected to the adaptable user interface 10 and can be configured to determine whether to change the state or functionality of the user interface 10 based on various conditions sensed by the sensors 38 and initiate the change if required.

[0037] FIG. 9 illustrates one example of a routine used by the controller 40 for determining whether the user interface 10 needs to be adapted to a sensed environmental condition. The device can begin operation in a “normal” mode (step 42) which provides a default set of user input options. Upon detection of a stimulus by the sensor (step 44), the controller determines if the stimulus detected by the sensor requires an adaptation of the user interface (step 46). If it does not, the routine goes back to step 44 to wait for the sensor to detect another stimulus. If it does, the user interface is adapted to accommodate the sensed environmental condition (step 48) and a timer is stated (step 50) indicating how long it has been since the user interface has been adapted. Upon detection of another stimulus by the sensor (step 52) the timer is checked to determine if it reached a predetermined minimum amount of time since the last user interface adaptation (step 54). If a minimum amount of time has passed, the routine returns to step 46 to determine if the user interface should be adapted, and if so the user interface is adapted (step 48) to the newly sensed environmental condition, the timer is reset (step 50) and the routine waits for the sensor to detect the next stimulus (step 52). The sensors can be periodically polled to check the current status of environmental conditions.

[0038] The foregoing description of the invention outlines exemplary embodiments of an adaptive user interface system and method. For purposes of explanation only, numerous specific details are set forth in order to provide a thorough understanding of the present invention. It is evident, however, to one skilled in the art that the exemplary embodiments may be practiced without these specific details. In other instances, structures and devices are shown in block diagram or tabular form in order to also further facilitate description of the exemplary embodiments.

[0039] While the exemplary embodiments illustrated in the Figures and described above are presently preferred, it should be understood that these embodiments are offered by way of example only. Other embodiments may include, for example, different techniques for performing the same operations. The invention is not limited to a particular embodiment, but extends to various modifications, combinations, and permutations that nevertheless fall within the scope and spirit of the appended claims as understood by one of ordinary skill in the art.