Active matrix type liquid crystal display and liquid crystal material

An active matrix type liquid crystal display device comprising:

• a pair of substrates with liquid crystal layer therebetween;
• a plurality of first signal lines and a plurality of second signal lines which crossing each other formed on one of the pair of substrates;
• a semiconductor layer formed above the first signal lines and under the second signal lines;
• a pixel electrode formed in each pixel region on the one of the pair of substrates and electrically connected to one of the second signal lines;
• wherein the semiconductor layer has a first parallel edge, a first slant edge, a second parallel edge, and a second slant edge, with said first slant edge directly connecting said first parallel edge with said second parallel edge, and said second parallel edge directly connecting said first slant edge with said second slant edge, said first and second parallel edges are parallel to one of the second signal lines, said first and second slant edges slant across said one of the second signal line, and
• the pixel electrode has a first parallel edge, a first slant edge, a second parallel edge, and a second slant edge in a crossing region thereof crossing with one of the first signal lines, with the first slant edge directly connecting said first parallel edge with said second parallel edge, and said second parallel edge directly connecting said first slant edge with said second slant edge, and said first parallel edge, said first slant edge, said second parallel edge, and said second slant edge of the pixel electrode face toward and substantially parallel to the first parallel edge, the first slant edge, said second parallel edge, and the second slant edge of the semiconductor layer respectively.