User interface for a hand held device

摘要

A device with a user interface includes a display screen, input keys, and a controller that is configured to control the display screen to display a three by three matrix of fields wherein each of the fields may contain a symbol, and wherein the controller is further interfaced with a number of the input keys, for example four selection keys or eight selection keys, in such a way that one of the symbols is selected by operation of at least one of these selection keys and some of the symbols are selected by simultaneous operation of two or more of the selection keys.

主权项

1. A device with a human interface comprising a display, input keys, and a controller that is configured to control
the display to display a three by three matrix of fields wherein each of the fields contains a symbol, and wherein the controller is further interfaced with a first set of four selection keys of the input keys in such a way that one of the symbols is selected by operation of at least one of the first set of four selection keys and some of the symbols are selected by simultaneous operation of two of the first set of four selection keys, wherein the display and the first set of four selection keys are positioned on opposite sides of the device, wherein the display is located on a front side of the device, and wherein the first set of four selection keys are located on a rear side of the device, wherein the controller is further configured to control a second set of four selection keys of the input keys, and wherein the first set of four selection keys and the second set of four selection keys are mounted on opposite sides of the device, and wherein the first set of four selection keys is allocated for selection at one level of a hierarchical selection scheme and the second set of four selection keys is allocated for selection at another level of the hierarchical selection scheme.