Liquid crystal device
View Patent ↗A liquid crystal device which has a first and second electrodes formed on a second substrate and which controls allows alignment of liquid crystal molecules by an electric field generated between the first and second electrodes, wherein the liquid crystal molecules in the liquid crystal layer are aligned in a first direction in a plane of the substrate, wherein a phase difference layer having molecules, which are inclined in the plane of the first or second substrate and are aligned in directions different from one another in the transmissive display portion and the reflective display portion, is formed on a surface of the first or second substrate opposed to the liquid crystal layer, and wherein a director of the molecules of the phase difference layer is aligned in a second direction parallel to the first direction at least in the plane of the transmissive display portion, wherein an angle formed by the alignment direction of the molecules of the phase difference layer in the transmissive display portion and the alignment direction of the molecules of the phase difference layer in the reflective display portion is about 67.5°.
1. A liquid crystal device comprising: a liquid crystal layer interposed between a first substrate and a second substrate; a plurality of pixels each having a transmissive display portion and a reflective display portion; and first and second electrodes formed on the second substrate;
liquid crystal molecules in the liquid crystal layer are aligned in a first direction in a plane of the substrate; and
a phase difference layer having molecules, which are inclined in the plane of the first or second substrate and are aligned in directions different from one another in the transmissive display portion and the reflective display portion, is formed on a surface of the first or second substrate opposed to the liquid crystal layer;
wherein a director of the molecules of the phase difference layer is aligned in a second direction parallel to the first direction at least in the plane of the transmissive display portion;
wherein an angle formed by the alignment direction of the molecules of the phase difference layer in the transmissive display portion and the alignment direction of the molecules of the phase difference layer in the reflective display portion is about 67.5°.
2. The liquid crystal device according to claim 1 , wherein a direction of the molecules in the phase difference layer inclined in the plane of the surface of the first or second substrate is substantially equal to that of the liquid crystal molecules in the liquid crystal layer inclined in the plane of the surface of the first or second substrate.
3. The liquid crystal device according to claim 1 , wherein the first substrate has a polarizing plate on the surface opposed to the liquid crystal layer and wherein an absorption axis of the polarizing plate is parallel to the first direction.
4. The liquid crystal device according to claim 1 , wherein retardations of the liquid crystal layer in the transmissive display portion and the reflective display portion are about a half wavelength and about a quarter wavelength, respectively.
5. The liquid crystal device according to claim 1 , wherein both the retardations of the phase difference layer in the transmissive display portion and in the reflective display portion are about a half wavelength.
6. The liquid crystal device according to claim 1 , wherein the phase difference layer is formed by polymerizing liquid crystalline compounds.