| 摘要 |
<p>A time synchronized digital modulation (TSDM) image display system (10, 20) that achieves a high level of gray scale resolution while utilizing binary light modulators. By producing color digitally, extremely accurate and consistent color reproduction is achieved. In the preferred embodiment the system includes a light source (21, 22, 23) producing a light beam of optical radiation that is divided into a plurality of beamlets which are modulated in a light modulator (36, 38, 40, 48) having M rows by N columns of modulator elements. Each modulator element (50) has an "on" state and an "off" state that is controllable by a set of image signals. In the "on" state a predetermined beamlet is transmitted by the modulator element, and in the "off" state the beamlet is prevented from being transmitted. When all of the modulator elements are in the "on" state, the intensity of the modulator output varies so that there is a different intensity of light transmitted by each modulator element. The modulated light beam is then scanned across a viewing surface (98). The modulator is synchronised with the scanner (64) so that during each scan a predetermined pattern of "on" and "off" states is present in the modulator, thus projecting a predetermined total intensity level of light onto each pixel of the viewing surface. Due to the speed at which the scanning occurs, a viewer perceives only the total integrated light intensity for each pixel, thereby producing a predetermined gray level (and thus color level) on each image pixel based on the particular pattern of "on" and "off" states of the modulator elements. When spectrally pure lasers are used for the light sources, the TSDM system makes standardizable digital color reproduction possible.</p> |
