Display device comprising a scan line that overlaps an entire region of a semiconductor film having a channel formation region
A display device with less light leakage and excellent contrast is provided. A display device having a high aperture ratio and including a large-capacitance capacitor is provided. A display device in which wiring delay due to parasitic capacitance is reduced is provided. A display device includes a transistor over a substrate, a pixel electrode connected to the transistor, a signal line electrically connected to the transistor, a scan line electrically connected to the transistor and intersecting with the signal line, and a common electrode overlapping with the pixel electrode and the signal line with an insulating film provided therebetween. The common electrode includes stripe regions extending in a direction intersecting with the signal line.
1. A liquid crystal display device comprising a pixel, the pixel comprising:
a semiconductor film comprising a channel formation region, over a scan line with a first insulating film therebetween;
a pixel electrode comprising a region over and in contact with the first insulating film;
a conductive film electrically connected to the semiconductor film; and
a signal line electrically connected to the semiconductor film,
a second insulating film over the conductive film and the signal line; and
a common electrode comprising an opening and a region over and in contact with the second insulating film,
wherein the common electrode does not overlap with the channel formation region and comprises a region overlapping with the signal line, and a region overlapping with the pixel electrode,
wherein the opening comprises a region not overlapping with the pixel electrode,
wherein the opening comprises a first region extending along a first direction and a second region connected to the first region and extending along a second direction intersecting with the first direction in a plane view,
wherein an entire region of the semiconductor film overlaps with the scan line,
wherein the conductive film comprises a first region over and in contact with the semiconductor film, a second region over and in contact with the pixel electrode, and a third region between the first region and the second region,
wherein the second region of the conductive film extends along a third direction parallel to or substantially parallel to the scan line, and
wherein the third region of the conductive film extends along a fourth direction intersecting with the third direction.
2. A liquid crystal display device comprising a pixel, the pixel comprising:
a semiconductor film comprising a channel formation region, over a scan line with a first insulating film therebetween;
a pixel electrode comprising a region over and in contact with the first insulating film;
a conductive film electrically connected to the semiconductor film; and
a signal line electrically connected to the semiconductor film,
a second insulating film over the conductive film and the signal line; and
a common electrode comprising an opening and a region over and in contact with the second insulating film,
wherein the common electrode does not overlap with the channel formation region and comprises a region overlapping with the signal line, and a region overlapping with the pixel electrode,
wherein the opening comprises a region not overlapping with the pixel electrode,
wherein the opening has a shape comprising a bent portion in a plane view,
wherein an entire region of the semiconductor film overlaps with the scan line,
wherein the conductive film comprises a first region over and in contact with the semiconductor film, a second region over and in contact with the pixel electrode, and a third region between the first region and the second region,
wherein the second region of the conductive film extends along a third direction parallel to or substantially parallel to the scan line, and
wherein the third region of the conductive film extends along a fourth direction intersecting with the third direction.
3. A liquid crystal display device comprising a pixel, the pixel comprising:
a semiconductor film comprising a channel formation region, over a scan line with a first insulating film therebetween;
a pixel electrode comprising a region over and in contact with the first insulating film;
a conductive film electrically connected to the semiconductor film; and
a signal line electrically connected to the semiconductor film,
a second insulating film over the conductive film and the signal line; and
a common electrode comprising an opening and a region over and in contact with the second insulating film,
wherein the common electrode does not overlap with the channel formation region and comprises a region overlapping with the signal line, and a region overlapping with the pixel electrode,
wherein the opening comprises a first region extending along a first direction and a second region extending along a second direction intersecting with the first direction,
wherein the opening comprises a portion in which the first region is connected to the second region in a plane view,
wherein an entire region of the semiconductor film overlaps with the scan line,
wherein the conductive film comprises a first region over and in contact with the semiconductor film, a second region over and in contact with the pixel electrode, and a third region between the first region and the second region,
wherein the second region of the conductive film extends along a third direction parallel to or substantially parallel to the scan line, and
wherein the third region of the conductive film extends along a fourth direction intersecting with the third direction.