| 摘要 |
A handheld electronic communication device is disclosed that is transitionab le between at least a compact configuration and expanded configuration. The handheld electronic communication device includes a display panel pivotally interconnected to a keyboard panel. The display panel can be overlaid on, and in substantial registration with, the keyboard panel in a compact configuration. Furthermore, the display panel ca n be offset above the keyboard panel in an expanded configuration. A pivot connection ca n be configured to couple and maintain the keyboard and display panels in substantial parallel orientation to each other in the compact and expanded configurations. The pivot connection includes an axis of rotation and is located in an upper corner of the handheld electronic communication device in the compact configuration. Additionally, a trackball navigation tool assembly is located at the upper corner of the handheld electronic communication device where the axis of rotation is located.
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