Display device
AssigneeSemiconductor Energy Laboratory Co., Ltd.
InventorAtsushi Hirose
Life of this patent
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Abstract
To provide a display device in which parasitic capacitance between wirings can be reduced while preventing increase in wiring resistance. To provide a display device with improved display quality. To provide a display device with low power consumption. A pixel of the liquid crystal display device includes a signal line, a scan line intersecting with the signal line, a first electrode projected from the signal line, a second electrode facing the first electrode, and a pixel electrode connected to the second electrode. Part of the scan line has a loop shape, and part of the first electrode is located in a region overlapped with an opening of the scan line. In other words, part of the first electrode is not overlapped with the scan line.
Claims8
A semiconductor device comprising a pixel portion, the pixel portion comprising:
- a scan line extending in a first direction and comprising a first region having an opening and a second region being adjacent to the first region of the scan line, a full width of the first region of the scan line being larger than a full width of the second region of the scan line in a top view;
- a first wiring comprising a first part extending in parallel to the first direction and a second part adjacent to the first part, a full width of the first part of the first wiring being smaller than a full width of the second part of the first wiring in the top view;
- a semiconductor film overlapping with the first region of the scan line;
- a signal line comprising a first part extending in parallel to a second direction intersecting with the first direction, a second part extending in parallel to the first direction and overlapping with the opening of the scan line, and a third part being over and in contact with the semiconductor film;
- a conductive layer having a first region being over and in contact with the semiconductor film and a second region overlapping with the first part and the second part of the first wiring;
- and
- a pixel electrode over the first wiring and the conductive layer, the pixel electrode being in contact with the second region of the conductive layer,
- wherein the semiconductor film comprises amorphous silicon,
- wherein the first wiring comprises same materials of the scan line, and
- wherein the conductive layer comprises same materials of the signal line.
A semiconductor device comprising a pixel portion, the pixel portion comprising:
- a scan line extending in a first direction and comprising a first region having an opening and a second region being adjacent to the first region of the scan line, a full width of the first region of the scan line being larger than a full width of the second region of the scan line in a top view;
- a first wiring comprising a first part extending in parallel to the first direction and a second part adjacent to the first part of the first wiring, a full width of the first part of the first wiring being smaller than a full width of the second part of the first wiring in the top view;
- a semiconductor film overlapping with the first region of the scan line;
- a signal line comprising a first part extending in parallel to a second direction intersecting with the first direction, a second part extending in parallel to the first direction and overlapping with the opening of the scan line, and a third part being over and in contact with the semiconductor film;
- a conductive layer having a first region being over and in contact with the semiconductor film and a second region extending in parallel to the first direction and overlapping with the first part and the second part of the first wiring;
- and
- a pixel electrode over the first wiring and the conductive layer, the pixel electrode being in contact with the second region of the conductive layer,
- wherein the semiconductor film comprises amorphous silicon,
- wherein the first wiring comprises same materials of the scan line, and
- wherein the conductive layer comprises same materials of the signal line.
Dependencies are inferred from the claim text.