| 摘要 |
A field sequential pulse width modulated display system ( 10 ) comprises a digital micromirror device (DMD) ( 24 ) having a plurality of micromirrors that each selectively pivot to reflect light onto a screen ( 28 ) to illuminate a corresponding pixel. A driver circuit ( 30 ) controls the DMD ( 24 ) responsive to sequences of pulse width segments formed by a processor ( 31 ). The processor ( 31 ) forms the pulse width segment sequences to alter the pixel brightness for a given one of a set of primary colors within a range of brightness values between adjacent pixel brightness boundaries, with each segment for each color interleaved with the segments for the other colors. The processor ( 31 ) alters the pixel brightness for a given color by altering the state of at least one selected pulse in only a single pulse width segment unless all of the pulses in that segment have the same state (all actuated or de-actuated), whereupon the state of one or more selected pulses in another pulse width segment are altered as the brightness of the pixels change. Any redistribution of light resulting from a change in pixel brightness is limited to the interval corresponding to a single pulse width segment, thereby reducing the likelihood of a visual disturbance perceptible to a viewer. |
