Liquid crystals and liquid crystal display apparatus employing the same
View Patent ↗A liquid crystal includes about 50 wt % to about 65 wt % of a negative compound material, and about 40 wt % to about 50 wt % of a neutral compound material. A liquid crystal display apparatus comprises a first substrate having a pixel area, a second substrate facing the first substrate, and a plurality of liquid crystals disposed between the first substrate and the second substrate, wherein each liquid crystal comprises about 50 wt % to about 65 wt % of a negative compound material having a dielectric anisotropy of a negative polarity, and about 40 wt % to about 50 wt % of a neutral compound material.
1. A liquid crystal, comprising:
about 50 wt % to about 65 wt % of a negative compound material having a dielectric anisotropy of a negative polarity, the negative compound material including compounds represented by each of the following chemical formula 2, 3 and 4; and
about 40 wt % to about 50 wt % of a neutral compound material including a compound represented by each of the following chemical formulas 5 and 7;
wherein, “R 3 ”, “R 4 ”, “R 5 ”, “R 6 ”, “R 7 ”, “R 8 ”, “R 9 ”, “R 10 ”, “R 13 ” and “R 14 ” is one of an alkyl group, an alkenyl group and an alkoxy group.
2. The liquid crystal of claim 1 , further comprising a positive compound material is about 2 wt % to about 15 wt %.
3. The liquid crystal of claim 2 , wherein the neutral compound material further comprises at least one compound expressed by the following chemical formula:
wherein “R 11 ” and “R 12 ” are one of an alkyl group, an alkenyl group and an alkoxy group.
4. The liquid crystal of claim 3 , wherein a content of the compound expressed by chemical formula 2 is about 5 wt % to about 15 wt %, wherein a content of the compound expressed by chemical formula 3 is about 18 wt % to about 25 wt %, and wherein a content of the compound expressed by chemical formula 4 is about 20 wt % to about 25 wt %.
5. The liquid crystal of claim 4 , wherein a content of the compound expressed by chemical formula 5 is about 25 wt % to about 30 wt %, wherein a content of the compound expressed by chemical formula 6 is less than about 10 wt %, and wherein a content of the compound expressed by chemical formula 7 is about 12 wt % to about 19 wt %.
6. A liquid crystal display apparatus, comprising:
a first substrate having a pixel area;
a second substrate facing the first substrate; and
a plurality of liquid crystals disposed between the first substrate and the second substrate, wherein each liquid crystal comprises:
about 50 wt % to about 65 wt % of a negative compound material having a dielectric anisotropy of a negative polarity, the negative compound material including compounds represented by each of the following chemical formula 2, 3 and 4; and
about 40 wt % to about 50 wt % of a neutral compound material including a compound represented by each of the following chemical formulas 5 and 7;
wherein, “R 3 ”, “R 4 ”, “R 5 ”, “R 6 ”, “R 7 ”, “R 8 ”, “R 9 ”, “R 10 ”, “R 13 ” and “R 14 ” is one of an alkyl group, an alkenyl group and an alkoxy group.
7. The apparatus of claim 6 , further comprising a positive compound material is about 2 wt % to about 15 wt %.
8. The apparatus of claim 6 , wherein the neutral compound material further comprises at least one compound expressed by the following chemical formula 6:
wherein, “R 11 ” and “R 12 ” are one of an alkyl group, an alkenyl group and an alkoxy group.
9. The apparatus of claim 8 , wherein a content of the compound expressed by chemical formula 2 is about 5 wt % to about 15 wt %, wherein a content of the compound expressed by chemical formula 3 is about 18 wt % to about 25 wt %, and wherein a content of the compound expressed by chemical formula 4 is about 20 wt % to about 25 wt %.
10. The apparatus of claim 9 , wherein a content of the compound expressed by chemical formula 5 is about 25 wt % to about 30 wt %, wherein a content of the compound expressed by chemical formula 6 is less than about 10 wt %, and wherein a content of the compound expressed by chemical formula 7 is about 12 wt % to about 19 wt %.
11. The apparatus of claim 10 , wherein a dielectric anisotropy of the liquid crystal is within a range of about −2.9 to −3.4.
12. The apparatus of claim 10 , wherein the liquid crystal has a phase transition temperature of about 74° C. to about 81° C. and a diffractive anisotropy of about 0.1 or the less.
13. The apparatus of claim 10 , further comprising:
a gate line disposed on the first substrate;
a data line disposed across the gate line to define the pixel area at a crossing of the gate line and the data line;
a pixel electrode to receive a data voltage corresponding to an image of the pixel area, the pixel electrode being disposed in the pixel area; and
a common electrode to receive a common voltage, the common electrode being disposed on the second substrate,
wherein the pixel electrode overlaps at least one of the gate line and the data line, and
wherein a frame frequency of the image is about 120 Hz.
14. The apparatus of claim 13 , further comprising:
a first domain divider arranged at the pixel electrode; and
a second domain divider arranged at the common electrode and spaced apart from the first domain divider, the first domain divider and the second domain divider dividing the pixel area into a plurality of domains,
wherein the pixel electrode comprises a first pixel electrode and a second pixel electrode having a smaller area than the first pixel electrode, wherein the first pixel electrode overlaps at least one of the gate line and the data line, and wherein a first data voltage and a second data voltage, which are different from each other, are applied to the first pixel electrode and the second pixel electrode, respectively.