| 摘要 |
<p>A display device that includes a display medium (12) having a planar display area over which an image is generated, a first (30) and second optical point beam (32) each directed in the display medium (12) coplanar with the planar display area, and beam controllers (26, 28) that scan each of the optical point beams to selectively interfere in the display area within a region defined by the intersection of the optical point beams to produce an intensity in the region that has enhanced visibility relative to the individual optical beams propagating in the display medium outside of the region. The beam controller (26, 28) may be an elongated reflector having a reflecting surface upon which a linear array of liquid crystal modulators are controlled to selectively transmit segments of a linear beam incident on the linear array, in order to provide the optical beam by selectively reflecting segments of the linear optical beam into the display medium. The beam controllers include electronic circuitry to scan the optical beams according to a video input signal. The display device preferably employs a laser (16, 18) as the source of the optical point beams.</p> |
