LIQUID CRYSTAL DISPLAY

Abstract

A liquid crystal display is provided. The liquid crystal display includes a pair of substrates. The pair of substrates are disposed opposite to each other, having electrodes disposed above the opposed faces of the substrates. A nematic liquid crystal layer is disposed between the substrates and has a positive dielectric anisotropy. The electrodes are disposed above at least one of the substrates have slits. The centers of the slits are displaced from the centers of the electrodes disposed above the other substrate.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a schematic view of one embodiment of a liquid crystal display;

FIGS. 2A and 2B are illustrations showing the operation principle of the liquid crystal display shown in FIG. 1;

FIGS. 3A to 3C are illustrations of the patterns of slits arranged in electrodes disposed above a pair of substrates included in liquid crystal displays;

FIGS. 4A to 4C are graphs showing the relationship between the observation angle and transmittance of liquid crystal display panels of Example 1;

FIGS. 5A and 5B are graphs showing the relationship between the observation angle and transmittance of other liquid crystal display panels of Example 1;

FIG. 6 is a graph showing the relationship between the observation angle and transmittance of a liquid crystal display panel used in Example 1 for comparison;

FIGS. 7A to 7D are graphs showing the relationship between the observation angle and transmittance of liquid crystal display panels of Example 2; and

FIG. 8 is a graph showing the relationship between the observation angle and transmittance of a liquid crystal display panel used in Example 2 for comparison.

Claims

1. A liquid crystal display comprising: a pair of substrates, disposed opposite to each other, having electrodes disposed above faces of the substrates; anda nematic liquid crystal layer, disposed between the substrates, having positive dielectric anisotropy,wherein the electrodes disposed above at least one of the substrates have slits and the centers of the slits are displaced from the centers of the electrodes disposed above the other substrate.

2. The liquid crystal display according to claim 1, wherein a longitudinal direction of the slits is substantially perpendicular to a direction in which average liquid crystal molecules are aligned in a voltage-free state.

3. The liquid crystal display according to claim 1, wherein at least one of the slits is present per about 10d, where d represents the cell gap.

4. The liquid crystal display according to claim 1, wherein liquid crystal molecules contained in the nematic liquid crystal layer are homogeneously aligned with respect to the faces of the substrates in a voltage-free state.

5. The liquid crystal display according to claim 4, wherein the homogeneous alignment is achieved by a rubbing that is performed such that the liquid crystal molecules make a predetermined pre-tilt angle with the faces of the substrates.

6. The liquid crystal display according to claim 5, wherein the pre-tilt angle is less than about five degrees.

7. The liquid crystal display according to claim 6, wherein the pre-tilt angle is about one to four degrees.

8. The liquid crystal display according to claim 5, wherein the centers of the slits are displaced from the centers of the electrodes disposed above the other substrate by about d/4 to 2d when the pre-tilt angle is less than about four degrees, where d represents the cell gap.

9. The liquid crystal display according to claim 1, further comprising active elements corresponding to display pixels.

10. The liquid crystal display according to claim 1, wherein the liquid crystal display is a transmissive or semi-transmissive type.

11. A liquid crystal display comprising: a pair of substrates, disposed opposite to each other, having electrodes disposed above the opposed faces of the substrates; anda nematic liquid crystal layer, disposed between the substrates, having positive dielectric anisotropy,wherein the electrodes disposed above at least one of the substrates have slits, the centers of the slits are displaced from the centers of the electrodes disposed above the other substrate, and the slits have a width greater than or equal to the cell gap.

12. The liquid crystal display according to claim 11, wherein d≦D≦2.5d is satisfied, where D represents the width of the slits and d represents the cell gap.

13. The liquid crystal display according to claim 11, wherein a longitudinal direction of the slits is substantially perpendicular to a direction in which average liquid crystal molecules are aligned in a voltage-free state.

14. The liquid crystal display according to claim 11, wherein at least one of the slits is present per about 10d, where d represents the cell gap.

15. The liquid crystal display according to claim 11, wherein liquid crystal molecules contained in the nematic liquid crystal layer are homogeneously aligned with respect to the faces of the substrates in a voltage-free state.

16. The liquid crystal display according to claim 15, wherein the homogeneous alignment is achieved in such a manner that rubbing is performed such that the liquid crystal molecules make a predetermined pre-tilt angle with the faces of the substrates.

17. The liquid crystal display according to claim 16, wherein the pre-tilt angle is less than about five degrees.

18. The liquid crystal display according to claim 17, wherein the pre-tilt angle is about one to four degrees.

19. The liquid crystal display according to claim 16, wherein the centers of the slits are displaced from the centers of the electrodes disposed above the other substrate by about d/4 to 2d when the pre-tilt angle is less than about four degrees, where d represents the cell gap.

20. The liquid crystal display according to claim 11, further comprising active elements corresponding to display pixels.

21. The liquid crystal display according to claim 11, wherein the liquid crystal display is a transmissive or semi-transmissive type.