| 摘要 |
<p>A switchable pixel of part of a display comprises a light source (1-4, 20) positioned behind a liquid crystal cell (8, 25). A reflective surface (8e, 29) is provided behind the cell (1-4, 20), a hole being present in the surface (8e, 29) which is aligned with the light beam (7) so that when the light source is emitting a beam of light, the cell can be switched to a relatively less transmissive state to allow ambient light to be reflected from the surface and enhance the contrast.</p> |
