Liquid crystal panel and liquid crystal display device
View Patent ↗A liquid crystal panel includes: a p-type liquid crystal material sandwiched by a pair of substrates and comb-teeth shape electrodes for applying, to the p-type liquid crystal material, an electric field parallel to a substrate surface. The p-type liquid crystal material is aligned vertically with respect to the substrate surface at the time when no electric field is applied. The comb-teeth shape electrodes have an electrode width of 5 μm or less, and an electrode spacing of 15 μm or less. A product of a dielectric constant anisotropy Δε and a refractive index anisotropy Δn of the p-type liquid crystal material is 1.3 or more and 3.1 or less.
1. A liquid crystal panel comprising:
a liquid crystal material sandwiched by a pair of substrates; and
electrodes for applying, to the liquid crystal material, an electric field parallel to a substrate surface,
the liquid crystal material including a p-type liquid crystal material,
the p-type liquid crystal material being vertically aligned with respect to the substrate surface at the time when no electric field is applied,
the electrodes having an electrode width of 5 μm or less and an electrode spacing of 15 μm or less,
the p-type liquid crystal material having, in a range of 1.3 to 3.1, a product of a dielectric constant anisotropy Δε and a refractive index anisotropy Δn.
2. The liquid crystal panel as set forth in claim 1 , wherein a product of a layer thickness d of the liquid crystal material and the refractive index anisotropy Δn is 0.3 μm or more and 0.7 μm or less.
3. The liquid crystal panel as set forth in claim 1 , wherein the liquid crystal material has an elastic constant k33 of 15 pN or more.
4. A liquid crystal panel comprising:
a liquid crystal material sandwiched by a pair of substrates; and
electrodes for applying, to the liquid crystal material, an electric field parallel to a substrate surface,
the liquid crystal material including a p-type liquid crystal material,
the p-type liquid crystal material being vertically aligned with respect to the substrate surface at the time when no electric field is applied,
the electrodes having an electrode width of 5 μm or less and an electrode spacing of 15 μm or less,
the p-type liquid crystal material having, in a range of 1.3 to 3.1, a product of a dielectric constant anisotropy Δε and a refractive index anisotropy Δn, and
wherein the liquid crystal material includes 10% or more tetracyclic liquid crystal material.
5. The liquid crystal panel as set forth in claim 1 , wherein:
the p-type liquid crystal material is a p-type nematic liquid crystal material; and
the electrodes are comb-teeth shape electrodes provided on at least one substrate out of the pair of substrates; and
the p-type nematic liquid crystal material is arranged in homeotropic alignment at a time when no electric field is applied.
6. The liquid crystal panel as set forth in claim 1 , wherein the liquid crystal material includes a compound containing an alkenyl group.
7. The liquid crystal panel as set forth in claim 1 , further comprising an alignment film made of a siloxane inorganic material on an opposing surface of at least one substrate out of the pair of substrates, the opposing surface facing a liquid crystal layer made of the liquid crystal material.
8. The liquid crystal panel as set forth in claim 1 , wherein:
the electrodes are provided on one substrate of the pair of substrates; and
an electrode film is provided on the other substrate of the pair of substrates, the electrode film covering all over a display area.
9. A liquid crystal display device comprising the liquid crystal panel as set forth in claim 1 .
10. The liquid crystal panel as set forth in claim 4 , wherein a product of a layer thickness d of the liquid crystal material and the refractive index anisotropy Δn is 0.3 μm or more and 0.7 μm or less.
11. The liquid crystal panel as set forth in claim 4 , wherein:
the p-type liquid crystal material is a p-type nematic liquid crystal material; and
the electrodes are comb-teeth shape electrodes provided on at least one substrate out of the pair of substrates; and
the p-type nematic liquid crystal material is arranged in homeotropic alignment at a time when no electric field is applied.
12. The liquid crystal panel as set forth in claim 4 , wherein the liquid crystal material includes a compound containing an alkenyl group.
13. The liquid crystal panel as set forth in claim 4 , further comprising an alignment film made of a siloxane inorganic material on an opposing surface of at least one substrate out of the pair of substrates, the opposing surface facing a liquid crystal layer made of the liquid crystal material.
14. The liquid crystal panel as set forth in claim 4 , wherein:
the electrodes are provided on one substrate of the pair of substrates; and
an electrode film is provided on the other substrate of the pair of substrates, the electrode film covering all over a display area.