Abstract: A hand-held display apparatus including a body which is gripped by a user's hand, and an interface to output image data. A display is also provided which displays an image received from the interface and vertically inverts the image in response to a vertical inversion signal. The device also includes a plurality of sensors, which are to be manipulated by a user's hand, and are disposed in proximity to the display symmetrically around a horizontal axis in relation to the display section. A processor is also provided which outputs the vertical inversion signal and reverses the functionality of at least one of the plurality of sensors.

Abstract: A user interface for displaying hierarchical data on a hand-held display device including a first-level display for displaying one or more first-level data items in the hierarchical data, and at least one field associated with each first-level data item, each field configured to display a first-level data sub-item associated with the first-level data item or a subordinate data indicator. The presence of the subordinate data indicator in a field indicates that the field has subordinate data associated with the field, the subordinate data being subordinate to the first-level data items in the hierarchical data.

Abstract: A hand-held display device including a housing which is gripped by a hand, and a display, supported by the housing, which displays an image. The device also includes a plurality of sensors having a concave surface disposed in proximity to the display section on the housing, which can be activated by a user's digit while holding the device in one hand. A processor is also provided in the housing to generate a signal based on a user's input to the at least one of the plurality of sensors to move a cursor displayed on the display in response to the activation of the at least one sensor.

Abstract: A hand-held display apparatus including a display, and a cursor which moves vertically and horizontally on the display to perform selections from a plurality of menu options. A control section is also provided in proximity of the display and is operable to move the cursor in at least a vertical and horizontal direction. The display apparatus also includes a graphical user interface (GUI) having an upper hierarchy menu selected by operation of the control section in one direction, and a lower hierarchy menu selected by operation of the control section in another direction.