Patent ID: 11899329
Assignee: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.
Field: Optics (Instruments)
Classification: CPC G | IPC G

Claim 2:
3. A liquid crystal display device having a pixel portion, comprising:
a liquid crystal layer;
a pixel electrode and a common electrode below the liquid crystal layer;
an insulating layer having an organic material below the pixel electrode and below the common electrode;
a wiring electrically connected to the common electrode through a first contact hole provided in the insulating layer having the organic material in the pixel portion; and
a transistor electrically connected to the pixel electrode through a second contact hole provided in the insulating layer having the organic material,
wherein each of the pixel electrode and the common electrode comprises indium tin oxide, indium zinc oxide, or zinc oxide,
wherein the wiring contains tantalum, tungsten, titanium, molybdenum, aluminum, chromium, or silver,
wherein a slit of the pixel electrode has a region overlapping with the common electrode,
wherein the pixel electrode has a region that overlaps with the wiring and a region that does not overlap with the wiring,
wherein in a plan view of the pixel portion, the wiring has a first region extending with a first width and a second region projecting only to one side from a partial region of the first region,
wherein the second region has no opening,
wherein the first contact hole overlaps the partial region and the second region in a plan view of the pixel portion,
wherein the second region has a first length in a direction intersecting with the extending direction of the wiring, and
wherein a semiconductor layer having a channel forming region of the transistor has a second length larger than the first length in the direction intersecting with the extending direction of the wiring.