Patent ID: 7408527
Filing Date: 2008-08-05
Classification: G09G,H04N

Abstract:
1. In a projection apparatus, a method of operation comprising: receiving a signal of one or more frames of visual images; dynamically selecting a size of a first portion of a frame period; and applying a first substantially constant level of current to drive a first light emitting device of a light source for the first portion of the frame period to cause the first light emitting device to emit light of a first color during the first portion of the frame period to render a frame of the visual images, the first light emitting device having an operational life characteristic that is dependent at least in part on drive current employed to drive the first light emitting device, and the first substantially constant level of current applied being selected in view of at least the first light emitting device's operational life characteristic dependency on drive current and the size of the first portion of the frame period relative to the size of the entire frame period.