Provided are a display panel and a display device. The display panel includes an array substrate. The array substrate includes a substrate, and a first-type transistor and a second-type transistor. The first-type transistor includes a first active layer, the second-type transistor includes a second active layer, and the second active layer is located on a side of the first active layer facing away from the substrate. Each of the first active layer and the second active layer is an oxide semiconductor active layer. By means of the technical method provided in the embodiments of the present disclosure, positions of the first active layer and the second active layer are adjusted, and further a position relationship between the first-type transistor and the second-type transistor in the array substrate is adjusted.

A display panel includes a plurality of pixel circuits configured to drive a plurality of inorganic light-emitting elements; a plurality of pixel electrodes configured to connect the plurality of inorganic light-emitting elements to the plurality of pixel circuits; a plurality of test transistors connected to the plurality of pixel circuits through the plurality of pixel electrodes; and at least one processor configured to: apply a voltage to at least one of the plurality of pixel circuits; and detect whether at least one of the plurality of pixel electrodes is defective based on current flowing through one of the plurality of test transistors according to the voltage applied to the at least one of the plurality of pixel circuits.

A display panel includes a plurality of pixel circuits configured to drive a plurality of inorganic light-emitting elements; a plurality of pixel electrodes configured to connect the plurality of inorganic light-emitting elements to the plurality of pixel circuits; a plurality of test transistors connected to the plurality of pixel circuits through the plurality of pixel electrodes; and at least one processor configured to: apply a voltage to at least one of the plurality of pixel circuits; and detect whether at least one of the plurality of pixel electrodes is defective based on current flowing through one of the plurality of test transistors according to the voltage applied to the at least one of the plurality of pixel circuits.

An electrostatic discharge protection device can include a first electrode extending in a first direction, an active layer, and a second electrode. The active layer has a first width in the first direction, and overlaps the first electrode. The active layer includes at least one hole in an overlapping region, and is disposed longer outwardly than one or more sides of the first electrode in a second direction intersecting the first direction. The second electrode is disposed side by side with the first electrode and includes a first connection portion to one side of the active layer.

An electrostatic discharge protection device can include a first electrode extending in a first direction, an active layer, and a second electrode. The active layer has a first width in the first direction, and overlaps the first electrode. The active layer includes at least one hole in an overlapping region, and is disposed longer outwardly than one or more sides of the first electrode in a second direction intersecting the first direction. The second electrode is disposed side by side with the first electrode and includes a first connection portion to one side of the active layer.

A display device includes a pixel circuit layer including a sub-pixel circuit having at least one transistor, an electrode layer disposed on the pixel circuit layer and including a pixel electrode electrically connected to the sub-pixel circuit and a common electrode spaced apart from the pixel electrode, a light emitting stack structure disposed on the electrode layer and including a first semiconductor layer, a second semiconductor layer disposed on the first semiconductor layer, and an active layer interposed between the first and second semiconductor layers, a first bonding electrode connected to the first semiconductor layer and electrically connected to the pixel electrode, a second bonding electrode connected to a portion of the second semiconductor layer not overlapping the first semiconductor layer and the active layer and electrically connected to the common electrode, and a sub-common electrode covering at least a top surface of the light emitting stack structure.

A display device includes a pixel circuit layer including a sub-pixel circuit having at least one transistor, an electrode layer disposed on the pixel circuit layer and including a pixel electrode electrically connected to the sub-pixel circuit and a common electrode spaced apart from the pixel electrode, a light emitting stack structure disposed on the electrode layer and including a first semiconductor layer, a second semiconductor layer disposed on the first semiconductor layer, and an active layer interposed between the first and second semiconductor layers, a first bonding electrode connected to the first semiconductor layer and electrically connected to the pixel electrode, a second bonding electrode connected to a portion of the second semiconductor layer not overlapping the first semiconductor layer and the active layer and electrically connected to the common electrode, and a sub-common electrode covering at least a top surface of the light emitting stack structure.

A semiconductor device includes a first impurity region, a second impurity region spaced from the first impurity region by a first length in a first direction, and a first channel region having a third length longer than the first length between the first and second impurity regions, a convex portion in a second direction between the first and second impurity regions, a third impurity region, a fourth impurity region spaced from the third impurity region by a second length in the first direction, and a second channel region having a fourth length longer than the second length between the third and fourth impurity regions, a concave portion opposite to the second direction between the third and fourth impurity regions, a first gate electrode above the first channel region and covering the convex portion, and a second gate electrode above the second channel region and filling the concave portion.

A semiconductor device includes a first impurity region, a second impurity region spaced from the first impurity region by a first length in a first direction, and a first channel region having a third length longer than the first length between the first and second impurity regions, a convex portion in a second direction between the first and second impurity regions, a third impurity region, a fourth impurity region spaced from the third impurity region by a second length in the first direction, and a second channel region having a fourth length longer than the second length between the third and fourth impurity regions, a concave portion opposite to the second direction between the third and fourth impurity regions, a first gate electrode above the first channel region and covering the convex portion, and a second gate electrode above the second channel region and filling the concave portion.

Disclosed is a light emitting display device including a substrate including a first area and a second area, a first light shielding pixel-defining film provided in the first area, exposing a first blue light emitting portion, a first green light emitting portion, and a first red light emitting portion, and having a first height, a second light shielding pixel-defining film provided in the second area, including a region exposing a second blue light emitting portion, a second green light emitting portion, and a second red light emitting portion and a light transmitting portion, and including an area having a second height smaller than the first height, and a light emitting element provided on the first blue light emitting portion, the first green light emitting portion, the first red light emitting portion, the second blue light emitting portion, the second green light emitting portion, and the second red light emitting portion.