Patent ID: 7273285

Claim:
A method for managing a lamp brightness, suitable for use in a displaying apparatus using a lamp to produce an image, the method comprising: presetting a selection item corresponding to a predetermined mode from a first mode and a second mode, wherein a brightness of the lamp at the first mode is different from the brightness at the second mode; searching a display signal, wherein the displaying apparatus is at one of a displaying state, a searching state, a no-signal state, and a video mute state, wherein the display signal exists when the displaying apparatus is at the displaying state; setting the lamp to the first mode when the display signal exists and when the predetermined mode is the first mode, and automatically setting the lamp from the first mode to the second mode when the display signal does not exist; and setting the lamp to the second mode when the display signal exists and when the predetermined mode is the second mode, and maintaining the lamp to the second mode when the display signal does not exist.