Indication device

Abstract

To provide a display device that is easy to design and offers a high degree of design flexibility. [Solution] The display unit has a pixel circuit and a drive circuit. The drive circuit has multiple It has a pulse output circuit. The pulse output circuit has the function of driving the gate line. Pixel rotation The circuit is electrically connected to the gate line. The pulse output circuit has a first transistor. The pixel circuit has a second transistor. The layer on which the second transistor is provided is the It is the upper layer of the layer on which transistor 1 is provided, and the first transistor and the second transistor The display device has a configuration that includes overlapping regions.

Claims

1. The display unit is located on the circuit board. The display unit is a display device having a plurality of pixels having light-emitting elements, The aforementioned display unit is A first conductive layer and A first insulating layer having a region located above the first conductive layer, A first semiconductor layer having a region located above the first insulating layer and having a channel formation region for the first transistor, A second insulating layer having a region located above the first semiconductor layer, A second conductive layer having a region located above the second insulating layer and a region that functions as the gate electrode of the second transistor, A third insulating layer having a region located above the second conductive layer and a region that functions as a gate insulating layer for the second transistor, A second semiconductor layer having a region located above the third insulating layer and having a channel formation region for the second transistor, A third conductive layer having a region in contact with the upper surface of the second semiconductor layer and a region that functions as either the source electrode or the drain electrode of the second transistor, A fourth conductive layer having a region in contact with the upper surface of the second semiconductor layer and a region that functions as the other of the source electrode or drain electrode of the second transistor, A fourth insulating layer having a region located on the third conductive layer and a region located on the fourth conductive layer, The substrate is flexible, The light-emitting element has a region located above the fourth insulating layer, The first conductive layer has a region that overlaps with the first semiconductor layer, The first conductive layer has a region that overlaps with the second semiconductor layer, The second conductive layer is located on a different layer from the gate electrode of the first transistor. The second semiconductor layer does not have a region that overlaps with the first semiconductor layer. A display device wherein the fourth conductive layer has a region that overlaps with the first conductive layer via the first semiconductor layer.

2. The display unit is located on the circuit board. The display unit is a display device having a plurality of pixels having light-emitting elements, The aforementioned display unit is A first conductive layer and A first insulating layer having a region located above the first conductive layer, A first semiconductor layer having a region located above the first insulating layer and having a channel formation region for the first transistor, A second insulating layer having a region located above the first semiconductor layer, A second conductive layer having a region located above the second insulating layer and a region that functions as the gate electrode of the second transistor, A third insulating layer having a region located above the second conductive layer and a region that functions as a gate insulating layer for the second transistor, A second semiconductor layer having a region located above the third insulating layer and having a channel formation region for the second transistor, A third conductive layer having a region in contact with the upper surface of the second semiconductor layer and a region that functions as either the source electrode or the drain electrode of the second transistor, A fourth conductive layer having a region in contact with the upper surface of the second semiconductor layer and a region that functions as the other of the source electrode or drain electrode of the second transistor, A fourth insulating layer having a region located on the third conductive layer and a region located on the fourth conductive layer, The substrate is flexible, The light-emitting element has a region located above the fourth insulating layer, The first conductive layer has a region that overlaps with the first semiconductor layer, The first conductive layer has a region that overlaps with the second semiconductor layer, The second conductive layer is located on a different layer from the gate electrode of the first transistor. The second semiconductor layer does not have a region that overlaps with the first semiconductor layer. A display device wherein the fourth conductive layer has a region that overlaps with the first conductive layer via the channel formation region of the first transistor.

3. In claim 1 or claim 2, The second semiconductor layer comprises indium, gallium, and zinc, in a display device.

4. In any one of claims 1 to 3, The light-emitting element is a display device having a phosphorescent layer.

5. In claim 4, The phosphorescent emitting layer comprises a phosphorescent material and a host material, and is a display device.

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