Liquid crystal display device comprising a scan line that overlaps an entire region of a first semiconductor film and a second semiconductor film
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 first pixel, the first pixel comprising:
a first semiconductor film 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 first semiconductor film; and
a first signal line electrically connected to the first semiconductor film,
wherein the first semiconductor film comprises a channel formation region of a first transistor,
a second pixel adjacent to the first pixel, the second pixel comprising:
a second semiconductor film over the scan line with the first insulating film therebetween; and
a second signal line electrically connected to the second semiconductor film;
a second insulating film over the conductive film, the first signal line and the second 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 of the first transistor and comprises a region overlapping with the first signal line, a region overlapping with the second 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 connected to the first region and extending along a second direction intersecting with the first direction in a region between the first signal line and the second signal line in a plane view,
wherein an entire region of the first semiconductor film and an entire region of the second semiconductor film overlap with the scan line,
wherein the conductive film comprises a first region over and in contact with the first 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 first pixel, the first pixel comprising:
a first semiconductor film 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 first semiconductor film; and
a first signal line electrically connected to the first semiconductor film,
wherein the first semiconductor film comprises a channel formation region of a first transistor,
a second pixel adjacent to the first pixel, the second pixel comprising:
a second semiconductor film over the scan line with the first insulating film therebetween; and
a second signal line electrically connected to the second semiconductor film;
a second insulating film over the conductive film, the first signal line and the second 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 of the first transistor and comprises a region overlapping with the first signal line, a region overlapping with the second signal line, and a region overlapping with the pixel electrode,
wherein the opening has a shape comprising a bend portion in a region between the first signal line and the second signal line in a plane view,
wherein an entire region of the first semiconductor film and an entire region of the second semiconductor film overlap with the scan line,
wherein the conductive film comprises a first region over and in contact with the first 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 first pixel, the first pixel comprising:
a first semiconductor film 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 first semiconductor film; and
a first signal line electrically connected to the first semiconductor film,
wherein the first semiconductor film comprises a channel formation region of a first transistor,
a second pixel adjacent to the first pixel, the second pixel comprising:
a second semiconductor film over the scan line with the first insulating film therebetween; and
a second signal line electrically connected to the second semiconductor film;
a second insulating film over the conductive film, the first signal line and the second 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 of the first transistor and comprises a region overlapping with the first signal line, a region overlapping with the second 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 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 region between the first signal line and the second signal line in a plane view,
wherein an entire region of the first semiconductor film and an entire region of the second semiconductor film overlap with the scan line,
wherein the conductive film comprises a first region over and in contact with the first 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.