Tactile scroll bar with illuminated document position indicator

摘要

A tactile touch-sensitive device for use as an electronic input device for indicating a position of an electronic document on a display device is described. The illuminable document position indicator aspect of the device provides a relative location of the electronic document on the display. The device may be included as part of a keyboard or an electronic book device. The illuminable document position indicator may be one or more static illuminable LEDs and/or a moveable light source and pivotable translucent elements which act as light wave guides. A controller may be used to control the illuminable document position indicator. The controller may change the color and/or intensity of LEDs based upon a displayed location of the electronic document relative to a beginning and an end of the electronic document.