| 摘要 |
<p>Visual display apparatus comprises a screen viewable from a viewing area and including an array of pixels, a lighting device operative to illuminate the pixels thereby to produce illumination directed along a path towards the viewing area, a control device operative selectively on the pixels to modulate the illumination in relation to a visual image; and a filter device operative to filter the modulated illumination thereby to reveal the visual image. The screen and the filter device are relatively so configured and arranged that in the viewing area the visual image and the modulated illumination are alternatively displayed.</p> |
