Patent ID: 7075513
Filing Date: 2006-07-11
Classification: G06F

Abstract:
1. A handheld device, comprising: a housing; a display screen on the front of the device; a first user input control on the back of the device, wherein the first user input control detects a direction of first user input; and a second user input control on the back of the device, wherein the second user input control detects a direction of second user input; wherein, when user input is received through the first user input control, content on the display screen is panned in a direction responsive to the detected direction of the first received user input, and wherein, when user input is received through the second user input control, content on the display screen is zoomed in or out responsive to the detected direction of the second received user input, the content on the display screen being zoomed in steps defined by a zoom-ratio, the zoom-ratio varying between a predetermined maximum zoom-ratio and a predetermined minimum zoom-ratio, wherein said zoom-ratio is defined by a content application.