| 摘要 |
<p>The invention concerns a process for producing grey levels for liquid crystal displays which do not require short switching times, bondings or drivers, and which do not cause undesirable colour sampling. Colour sampling is prevented because the thickness of the liquid crystal layers remains constant over the entire switching region of the display, i.e., for all image points. In addition, to obviate the use of leads, drivers or shorter switching times, the effective electric field is varied in the space above an image point. The basis of the invention is therefore the division of an image point (the size of which is usually approximately 50 to 1000 νm) into partial surfaces or regions in which, at constant external voltage, the effective electric field is different while the thickness of the liquid crystal layer does not change. The electric field can be varied by varying the distance between the electrode (2, 2') and the LC layer (5) above the surface of an image point, or by varying the dielectric constant of the layer (3, 3') between the electrode and the LC layer above the surface of an image point.</p> |
