| 主权项 |
1. A digital television, comprising:
a navigational button arrangement arranged to provide a navigational interface to a user and including first, second, third, and fourth buttons having a bimodal operation; and including first, second, third, and fourth optical elements for respectively displaying colors of light on the first, second, third, and fourth buttons; wherein, in one mode of operation, the first, second, third, and fourth buttons provide a navigational mode for traversing a graphical user interface presented on the digital television and, in another mode of operation, the first, second, third, and fourth buttons provide an interactive application mode enabling initiation of different interaction application programs having respective different associated interaction application functions for interacting with a particular digital television application being currently presented to the user on the digital television; wherein, in the navigational mode, the first, second, third, and fourth optical elements are turned on to emit light of a first color and, in the interactive application mode, if the first, second, third, and fourth optical elements are turned on to emit respective lights, the respective lights are of second, third, fourth, and fifth colors, wherein the digital television displays up to four different interactive application functions, each different interactive application function associated with a different color selected from the second, third, fourth, and fifth colors and correlated with a respective one the first, second, third and fourth buttons emitting the associated one of the second, third, fourth and fifth colors in the interactive application mode; and wherein among the optical elements, only those optical elements that emit same colors associated with said displayed interactive application functions are turned on, others of the optical elements are turned off. |
