Patent ID: 7206043

Claim:
An electro-optical device, comprising: a substrate; a first data line formed above the substrate; a second data line extending substantially parallel to the first data line; a first scanning line extending perpendicular to the first and second data lines so as to intersect the first and second data lines; a second scanning line extending parallel to the first scanning line; a switching element electrically connected to corresponding ones of the first and second data lines and the first and second scanning lines; a counter substrate disposed in opposition with the substrate; a liquid crystal layer including a twisted nematic liquid crystal; pixel electrodes provided in correspondence with the switching elements, each pixel electrode including: a first side extending substantially parallel to the data lines, a second side extending substantially parallel to the scanning lines and substantially perpendicular to the first side, a third side extending substantially parallel to the first side, a fourth side extending substantially perpendicular to the first side, a first corner formed with a substantially 90° angle at the intersection between the first side and the second side; a second corner formed with a substantially 90° angle at the intersection between the second side and the third side; a third corner protruding in-board with relation to an imaginary right-angle corner formed where an imaginary extension of the third side intersects with an imaginary extension of the fourth side; a fourth corner protruding in-board with relation to an imaginary right-angle corner formed where an imaginary extension of the fourth side intersects with an imaginary extension of the first side; a light-shielding film that extends along the data lines and the scanning lines, the light-shielding film having a lattice shape, the light-shielding film including: a first corner portion that covers the first corner of the pixel electrode, the first corner portion including a substantially right-angle corner that protrudes away from the first corner of the pixel electrode so that the right-angle corner of the first corner portion is substantially symmetrical with the first corner of the pixel electrode; and a second corner portion that covers the second corner of the pixel electrode, the second corner portion including a substantially right-angle corner that substantially follows the second and third sides of the pixel electrode at the second corner of the pixel electrode.