Abstract: An interactive video display system. A display screen is for displaying a visual image for presentation to a user. A camera is for detecting an object in an interactive area located in front of the display screen, the camera operable to capture three-dimensional information about the object. A computer system is for directing the display screen to change the visual image in response to the object.

Abstract: An interactive video display system uses strobing light to allow easy and unencumbered interaction between a person and projected video images. A camera may be synchronized to the strobing light and the strobing light may be in an infrared spectral range. A processing system detects images of a human in the field of view of the camera and controls the display so that the projected video images are changed based on an interaction between the human and the projected video images. The system may project the video images on a surface around the person and may move the projected video images on the surface based on a movement of the person. The projected video images may include computer-generated characters and/or virtual objects that react to the movement of a person.

Abstract: A mobile device provides its location information to contacts of a user of the mobile device. A contact has a particular precision level assigned thereto from a set of two or more precision levels. The assignment of precision levels to contacts is according to one or more criteria. The mobile device ensures that any location information of the mobile device provided to the contact is not more precise than the precision level currently assigned to the contact.

Abstract: The approximate location of a directed cell of a cellular network is calculated based on locations in the vicinity of which mobile devices were able to detect the directed cell. A mobile device is able to estimate its own location from the approximate locations of one or more directed cells that it can identify. This estimated location of the mobile device may be used to seed its GPS receiver.

Abstract: Method an arrangement for affecting diagonal movement of a cursor 171 on the display screen 322 of a handheld communication device 300 having a reduced alphabetic keyboard. The method includes sensing movement at an auxiliary user input 328 of the handheld communication device 300 indicative of the user's desire to affect diagonal movement of the cursor 171 on the display screen 322 of the handheld communication device 300. X-direction signals and Y-direction signals are produced based on the sensed movement at the auxiliary user input 328. During that time while the necessary signals are being collected and processed, the cursor 171 is held steady on the display screen 322 until a predetermined criterion is met for discriminating whether the user has indicated x-direction cursor movement, y-direction cursor movement or diagonal cursor movement.

Abstract: A device allows easy and unencumbered interaction between a person and a computer display system using the person's (or another object's) movement and position as input to the computer. In some configurations, the display can be projected around the user so that that the person's actions are displayed around them. The video camera and projector operate on different wavelengths so that they do not interfere with each other. Uses for such a device include, but are not limited to, interactive lighting effects for people at clubs or events, interactive advertising displays, etc. Computer-generated characters and virtual objects can be made to react to the movements of passers-by, generate interactive ambient lighting for social spaces such as restaurants, lobbies and parks, video game systems and create interactive information spaces and art installations. Patterned illumination and brightness and gradient processing can be used to improve the ability to detect an object against a background of video images.

Abstract: System and method that provides audible feedback through a speaker of a handheld electronic device upon actuation of a navigation tool. The audible feedback produced by the speaker is capable of being modified based upon the location, speed, and other characteristics of the movement of a cursor on the display of a handheld electronic device. The sound produced by the speaker can originate from an audio file stored or otherwise available on the handheld electronic device.

Abstract: Method an arrangement for affecting diagonal movement of a cursor 171 on the display screen 322 of a handheld communication device 300 having a full alphabetic keyboard. The method includes sensing movement at an auxiliary user input 328 of the handheld communication device 300 indicative of the user's desire to affect diagonal movement of the cursor 171 on the display screen 322 of the handheld communication device 300. X-direction signals and Y-direction signals are produced based on the sensed movement at the auxiliary user input 328. During that time while the necessary signals are being collected and processed, the cursor 171 is held steady on the display screen 322 until a predetermined criterion is met for discriminating whether the user has indicated x-direction cursor movement, y-direction cursor movement or diagonal cursor movement.

Abstract: Method and arrangement for adjusting sensitivity in the horizontal and/or vertical directions for the motion of a cursor on the display of a handheld electronic device incorporating a trackball as a user input device. The sensitivity can be user defined, program defined or a combination of the two. The sensitivity adjustment allows for special properties associated with the device's display dimensions and navigation device.

Abstract: System and method that provides audible feedback through a speaker of a handheld electronic device having a reduced alphabetic keyboard upon actuation of a navigation tool. The audible feedback produced by the speaker is capable of being modified based upon the location, speed, and other characteristics of the movement of a cursor on the display of a handheld electronic device. The sound produced by the speaker can originate from an audio file stored or otherwise available on the handheld electronic device.

Abstract: A method and hierarchical menu is provided for displaying on the screen of a wireless handheld electronic device an extended menu or a short menu, which is a subset of the corresponding extended menu. The method includes displaying a page on a screen and receiving an ambiguous request/selection when no menu is displayed. In response to the ambiguous selection, a short menu corresponding to the displayed page is displayed on the screen. Various short menus are provided with their respective menu items being dependent and adjustable based upon the position of a cursor on the displayed page, the currently opened application, and/or the previous selections. Further, a selection from the short menu is capable of displaying the extended menu corresponding thereto.

Abstract: Method and arrangement for adjusting sensitivity in the horizontal and/or vertical directions for the motion of a cursor on the display of a handheld electronic device having a reduced keyboard. The sensitivity can be user defined, program defined or a combination of the two. The sensitivity adjustment allows for special properties associated with the device's display dimensions and navigation device.

Abstract: Method an arrangement for affecting diagonal movement of a cursor 171 on the display screen 322 of a handheld communication device 300. The method includes sensing movement at an auxiliary user input 328 of the handheld communication device 300 indicative of the user's desire to affect diagonal movement of the cursor 171 on the display screen 322 of the handheld communication device 300. X-direction signals and Y-direction signals are produced based on the sensed movement at the auxiliary user input 328. During that time while the necessary signals are being collected and processed, the cursor 171 is held steady on the display screen 322 until a predetermined criterion is met for discriminating whether the user has indicated x-direction cursor movement, y-direction cursor movement or diagonal cursor movement.

Abstract: A method and hierarchical menu is provided for displaying on the screen of a handheld electronic device having a full alphabetic keyboard an extended menu or a short menu, which is a subset of the corresponding extended menu. The method includes displaying a page on a screen and receiving an ambiguous request/selection when no menu is displayed. In response to the ambiguous selection, a short menu corresponding to the displayed page is displayed on the screen. Various short menus are provided with their respective menu items being dependent and adjustable based upon the position of a cursor on the displayed page, the currently opened application, and/or the previous selections. Further, a selection from the short menu is capable of displaying the extended menu corresponding thereto.

Abstract: System and method that provides audible feedback through a speaker of a handheld electronic device having a full alphabetic keyboard upon actuation of a navigation tool. The audible feedback produced by the speaker is capable of being modified based upon the location, speed, and other characteristics of the movement of a cursor on the display of a handheld electronic device. The sound produced by the speaker can originate from an audio file stored or otherwise available on the handheld electronic device.

Abstract: Method an arrangement for affecting diagonal movement of a cursor 171 on the display screen 322 of a wireless handheld communication device 300. The method includes sensing movement at an auxiliary user input 328 of the handheld communication device 300 indicative of the user's desire to affect diagonal movement of the cursor 171 on the display screen 322 of the handheld communication device 300. X-direction signals and Y-direction signals are produced based on the sensed movement at the auxiliary user input 328. During that time while the necessary signals are being collected and processed, the cursor 171 is held steady on the display screen 322 until a predetermined criterion is met for discriminating whether the user has indicated x-direction cursor movement, y-direction cursor movement or diagonal cursor movement.

Abstract: A method and hierarchical menu is provided for displaying on the screen of a handheld electronic device having a reduced alphabetic keyboard an extended menu or a short menu, which is a subset of the corresponding extended menu. The method includes displaying a page on a screen and receiving an ambiguous request/selection when no menu is displayed. In response to the ambiguous selection, a short menu corresponding to the displayed page is displayed on the screen. Various short menus are provided with their respective menu items being dependent and adjustable based upon the position of a cursor on the displayed page, the currently opened application, and/or the previous selections. Further, a selection from the short menu is capable of displaying the extended menu corresponding thereto.

Abstract: A method and hierarchical menu is provided for displaying on the screen of a handheld electronic device an extended menu or a short menu, which is a subset of the corresponding extended menu. The method includes displaying a page on a screen and receiving an ambiguous request/selection when no menu is displayed. In response to the ambiguous selection, a short menu corresponding to the displayed page is displayed on the screen. Various short menus are provided with their respective menu items being dependent and adjustable based upon the position of a cursor on the displayed page, the currently opened application, and/or the previous selections. Further, a selection from the short menu is capable of displaying the extended menu corresponding thereto.

Abstract: System and method that provides audible feedback through a speaker of a wireless handheld electronic device upon actuation of a navigation tool. The audible feedback produced by the speaker is capable of being modified based upon the location, speed, and other characteristics of the movement of a cursor on the display of a wireless handheld electronic device. The sound produced by the speaker can originate from an audio file stored or otherwise available on the wireless handheld electronic device.

Abstract: Method and arrangement for adjusting sensitivity in the horizontal and/or vertical directions for the motion of a cursor on the display of a handheld electronic device having a full alphabetic keyboard. The sensitivity can be user defined, program defined or a combination of the two. The sensitivity adjustment allows for special properties associated with the device's display dimensions and navigation device.