Liquid crystal display apparatus
View Patent ↗The object is to provide a liquid crystal display reducing degradation in image quality. A liquid crystal display apparatus comprises a first planar electrode, a first insulator layered over an upper surface of the first planar electrode, a planar pixel electrode layered over an upper surface of the first insulator, a second insulator layered over an upper surface of the pixel electrode, a second planar electrode that covers the pixel electrode and that is layered over an upper surface of the second insulator, and a liquid crystal layer disposed over an upper surface of the second planar electrode. The second planar electrode includes an aperture portion including a first region and a second region integrated with a first region, the first region is a region is overlapped with both the first planar electrode and the pixel electrode, the second region is overlapped with the first planar electrode and is not overlapped with the pixel electrode, and a first angle between a first side of the first region and a first virtual line dividing the aperture portion into the first region and the second region is equal to or smaller than 90 degrees.
1. A liquid crystal display apparatus comprising:
a first planar electrode;
a first insulator layered over an upper surface of the first planar electrode;
a planar pixel electrode layered over an upper surface of the first insulator;
a second insulator layered over an upper surface of the planar pixel electrode;
a second planar electrode that covers the planar pixel electrode and that is layered over an upper surface of the second insulator; and
a liquid crystal layer disposed over an upper surface of the second planar electrode, wherein
the second planar electrode includes an aperture portion including a first region and a second region integrated with the first region,
the aperture portion is parallelogram-shaped, and includes two long sides and two short sides,
the first region is overlapped with both the first planar electrode and the planar pixel electrode,
the second region is overlapped with the first planar electrode and is not overlapped with the planar pixel electrode,
a cross axes angle of inside the first region between a short side of the two short sides of the aperture portion and a virtual line dividing the aperture portion into the first region and the second region is an acute angle, and
a long side of the two long sides of the aperture portion and the virtual line do not intersect, or a cross axes angle of inside the first region between the long side of the two long sides of the aperture portion and the virtual line is an obtuse angle,
wherein
a pixel includes a first long-side and a second long-side facing the first long-side,
the aperture portion has another second region,
the second region is disposed on the first long-side side of the pixel,
the another second region is disposed on the second long-side side of the pixel,
the first region and the another second region are integrally formed, and
the second region and the another second region are symmetrically disposed.
2. The liquid crystal display apparatus according to claim 1 , wherein the directions of the two short sides of the aperture portion are approximately parallel to the directions of short sides of the planar pixel electrode.
3. The liquid crystal display apparatus according to claim 1 , wherein the directions of the two long sides of the aperture portion are tilted at an acute angle with respect to the directions of long sides of the planar pixel electrode.
4. The liquid crystal display apparatus according to claim 1 , further comprising:
a gate line disposed to extend along a direction of a short side of the pixel, and
a source line disposed to extend along the a direction of a long side of the pixel,
wherein the liquid crystal layer includes liquid crystal molecules, and
a rubbing direction of the liquid crystal molecules is parallel to or tilted at an acute angle with respect to the direction of the long side of the pixel.
5. The liquid crystal display apparatus according to claim 1 , wherein
a plurality of the pixel electrodes are arrayed in a matrix, and
inclinations of the two long sides of the aperture portions of the second planar electrodes that are adjacent to each other in a column direction with respect to the column direction are different from each other, and
the aperture portions of the second planar electrodes that are adjacent to each other are symmetrically disposed.
6. The liquid crystal display apparatus according to claim 1 , further comprising:
a driving circuit configured to apply voltage to the first planar electrode, the second planar electrode and the planar pixel electrode to drive liquid crystal molecules in the liquid crystal layer, wherein
the driving circuit drives the liquid crystal molecules by both an electric field occurred between the first planar electrode and the planar pixel electrode and an electric field occurred between the second planar electrode and the planar pixel electrode.
7. The liquid crystal display apparatus according to claim 1 , wherein the second region and the another second region are point symmetric with respect to the center of gravity of the aperture portion.
8. The liquid crystal display apparatus according to claim 1 , wherein a vertex of the second region is rounded.