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US 2006/0221286 A1Published application
Compensators For Liquid Crystal Displays and the Use and Manufacture of the Compensators
Assignees3M Innovative Properties Company, Rolic AG
InventorsRichard Allen, Thomas Bachels, Jurg Funfschilling, Martin Schadt, Hubert Seiberle
Life of this patent
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Abstract
Compensation of a liquid crystal display can be achieved using a compensation structure, having, in the following order: a) a first o-plate; b) a first retarder; c) a liquid crystal cell; d) a second retarder; and e) a second o-plate. The first and second retarders can be c-plates or biaxial retarders.
Claims25
A liquid crystal display, comprising:
- a first o-plate having a first azimuthal orientation;
- a first c-plate;
- a liquid crystal cell comprising a rear surface and a front surface, wherein the liquid crystals at the rear surface have a second azimuthal orientation and the liquid crystals at the front surface have a third azimuthal orientation and wherein the first c-plate is disposed between the first o-plate and the liquid crystal cell;
- a second c-plate;
- and
- a second o-plate having a fourth azimuthal orientation, wherein the second c-plate is disposed between the second o-plate and the liquid crystal cell;
- wherein the first, second, third and fourth azimuthal orientations are disposed in a helical arrangement, wherein
- the second azimuthal orientation differs from the first azimuthal orientation by an angle in the range of 75 to 105 degrees in a first rotational direction,
- the third azimuthal orientation differs from the second azimuthal orientation by an angle in the range of 75 to 105 degrees in the first rotational direction, and
- the fourth azimuthal orientation differs from the third azimuthal orientation by an angle in the range of 75 to 105 degrees in the first rotational direction.
7 more elements
A liquid crystal display, comprising:
- a first o-plate having a first azimuthal orientation;
- a first c-plate;
- a liquid crystal cell comprising a rear surface and a front surface, wherein the liquid crystals at the rear surface have a second azimuthal orientation and the liquid crystals at the front surface have a third azimuthal orientation and wherein the first c-plate is disposed between the first o-plate and the liquid crystal cell;
- a second c-plate;
- and
- a second o-plate having a fourth azimuthal orientation, wherein the second c-plate is disposed between the second o-plate and the liquid crystal cell;
- wherein the first, second, third and fourth azimuthal orientations are disposed in a helical arrangement and increase or decrease monotonically in the order listed.
4 more elements
A liquid crystal display, comprising:
- a first o-plate having a first azimuthal orientation;
- a first c-plate;
- a liquid crystal cell comprising a rear surface and a front surface, wherein the liquid crystals at the rear surface have a second azimuthal orientation and the liquid crystals at the front surface have a third azimuthal orientation and wherein the first c-plate is disposed between the first o-plate and the liquid crystal cell;
- a second c-plate;
- and
- a second o-plate having a fourth azimuthal orientation, wherein the second c-plate is disposed between the second o-plate and the liquid crystal cell;
- wherein the first, second, third and fourth azimuthal orientations are disposed in a helical arrangement and a) the first and second azimuthal orientations, b) the second and third azimuthal orientations, and c) the third and fourth azimuthal orientations, respectively, differ by substantially the same increment.
4 more elements
Dependencies are inferred from the claim text.