An optical system in one aspect of the present disclosure includes a first light source, a second light source, a first spatial optical phase modulator, a second spatial optical phase modulator, and a projector. The first spatial optical phase modulator outputs first phase-modulated light based on an input light having a first wavelength from the first light source. The second spatial optical phase modulator outputs second phase-modulated light based on input light having a second wavelength from the second light source. The projector projects the first phase-modulated light and the second phase-modulated light on a target. The first spatial optical phase modulator is a liquid crystal device including a first liquid crystal layer. The second spatial optical phase modulator is a liquid crystal device including a second liquid crystal layer. The first liquid crystal layer includes a liquid crystal material different from that of the second liquid crystal layer.

The instant invention relates to mesogenic media exhibiting a blue phase, comprising one or both components selected from the two following components, components A and B, component A, comprising one or more compounds selected from the group of compounds of formula I-M, ##STR00001##
and component B, consisting of one or more compounds selected from the group of compounds of formula I-U, ##STR00002##
wherein the parameters are as specified in the text, preferably stabilized by a polymer, and their use in electro-optical light modulation elements and their respective use in displays, as well as to such displays.

A liquid crystal composition is described, containing a chiral agent and achiral component T containing at least one compound 1 having an unsubstituted or methyl group-substituted dioxane ring and having at least one —COO— or —CF.sub.2O— as a connecting group, and exhibiting an optically isotropic liquid crystal phase.

The present invention relates to liquid crystal media comprising polymerisable mesogenic compounds with a bent shape, and to electro-optical displays comprising these media as light modulation media. In particular the electro-optical displays according to the present invention are displays, which are operated at a temperature, at which the liquid crystal modulation media are in an optically isotropic phase, preferably in a blue phase.

The invention relates to a polymerisable LC medium with flat optical dispersion, a polymer film with flat optical dispersion obtainable from such a medium, and the use of the polymerisable LC medium and polymer film in optical, electro optical, electronic, semiconducting or luminescent components or devices.

Mesogenic compounds of formula I-Z ##STR00001##
are suitable for use in mesogenic media. Such mesogenic media can exhibit a blue phase and comprise component A, consisting of one or more compounds of formula I-Z, and, optionally a component B, consisting of one or more compounds selected from the group of compounds of formulae
I-M and I-U, ##STR00002##
wherein the parameters are as defined herein. The media can also be stabilized by a polymer. The media can be used in electro-optical light modulation elements and displays.

Synthetic two- or three-dimensional structures are described that include directional negative, near-zero, or zero Poisson ratio. Methods for forming the structures are also described. Disclosed structures mimic disclination networks as occur in soft cubic blue phase high chirality liquid crystals. Disclination networks can be based upon BPI or BPII phases and can include modifications as compared to an undistorted bulk blue phase crystal.

An optical component including a first layer, a second layer and a bulk sandwiched between the first and second layers, where the bulk is formed by a composition containing a liquid crystal material which is in a blue phase. At least one of the first and second layers has, toward the bulk, an alignment layer. The blue phase of the liquid crystal material exhibits a uniform organization in three directions (Ox, Oy, Oz) in at least 80% of the volume of the bulk, the liquid crystal material being stabilized in the blue phase at least over the temperatures ranging from 10° C. to 35° C.

A device includes a polymer stabilized blue phase liquid crystal (“PS-BPLC”) layer. The device also includes an alignment structure coupled with the PS-BPLC layer. LC molecules disposed in contact with the alignment structure are configured to have a spatially varying in-plane orientation pattern that is at least partially defined by the alignment structure. The PS-BPLC layer is configured to forwardly deflect a polarized light having a predetermined handedness, and transmit a polarized light having a handedness that is orthogonal to the predetermined handedness.

A device includes a polymer stabilized blue phase liquid crystal (“PS-BPLC”) layer. The device also includes an alignment structure coupled with the PS-BPLC layer. LC molecules disposed in contact with the alignment structure are configured to have a spatially varying in-plane orientation pattern that is at least partially defined by the alignment structure. The PS-BPLC layer is configured to forwardly deflect a polarized light having a predetermined handedness, and transmit a polarized light having a handedness that is orthogonal to the predetermined handedness.