Indication device

Abstract

To provide a liquid crystal display device with a high aperture ratio. [Solution] A liquid is placed between the first conductive layer, the second conductive layer, the third conductive layer and the fourth conductive layer. The liquid crystal element has a crystal layer, and the first to fourth conductive layers are translucent to visible light. Each has an overlapping region. Furthermore, the second conductive layer has a region that overlaps with the first conductive layer and the third conductive layer. It is provided between the electrode layers. Between the first conductive layer and the second conductive layer, and between the second conductive layer and the An insulating layer is provided between the conductive layer 3 and each other. Therefore, the second conductive layer is an electrode. The configuration consists of two capacitive elements stacked on top of each other. These two capacitive elements are light-transmitting, Because the liquid crystal elements are arranged in an overlapping configuration, the aperture ratio can be increased.

Claims

1. A display device having a pixel portion comprising: a first transistor having a top gate structure; a display element having a pixel electrode electrically connected to either the source electrode or the drain electrode of the first transistor; and a capacitive element, The oxide semiconductor film having the channel formation region of the first transistor, A first conductive film having a region that overlaps with the oxide semiconductor film and functioning as the gate electrode of the first transistor, A second conductive film is electrically connected to the first conductive film and functions as a first wiring, A first insulating film having a region positioned above the oxide semiconductor film, A third conductive film is electrically connected to the oxide semiconductor film through a first opening in the first insulating film and functions as the other of the source electrode or drain electrode of the first transistor, A fourth conductive film is electrically connected to the oxide semiconductor film through a second opening in the first insulating film, and functions as either the source electrode or the drain electrode of the first transistor, and also functions as one electrode of the capacitive element. A fifth conductive film is electrically connected to the third conductive film and functions as a second wiring, A sixth conductive film is electrically connected to the fourth conductive film, has a region positioned above the fourth conductive film, and functions as the pixel electrode. A seventh conductive film having a region located below the sixth conductive film and functioning as the other electrode of the capacitive element, The present invention comprises an eighth conductive film having a region positioned above the sixth conductive film and functioning as a common electrode for the display element, The first conductive film comprises at least one of aluminum, titanium, chromium, nickel, copper, yttrium, zirconium, molybdenum, silver, tantalum, and tungsten. Each of the second conductive film and the fifth conductive film has light-shielding properties. In a plan view, the fifth conductive film intersects with the second conductive film. Display device.

2. A display device having a pixel portion comprising: a first transistor having a top gate structure; a display element having a pixel electrode electrically connected to either the source electrode or the drain electrode of the first transistor; and a capacitive element, The oxide semiconductor film having the channel formation region of the first transistor, A first conductive film having a region that overlaps with the oxide semiconductor film and functioning as the gate electrode of the first transistor, A second conductive film is electrically connected to the first conductive film and functions as a first wiring, A first insulating film having a region positioned above the oxide semiconductor film, A third conductive film is electrically connected to the oxide semiconductor film through a first opening in the first insulating film and functions as the other of the source electrode or drain electrode of the first transistor, A fourth conductive film is electrically connected to the oxide semiconductor film through a second opening in the first insulating film, and functions as either the source electrode or the drain electrode of the first transistor, and also functions as one electrode of the capacitive element. A fifth conductive film is electrically connected to the third conductive film and functions as a second wiring, A sixth conductive film is electrically connected to the fourth conductive film, has a region positioned above the fourth conductive film, and functions as the pixel electrode. A seventh conductive film having a region located below the sixth conductive film and functioning as the other electrode of the capacitive element, The present invention comprises an eighth conductive film having a region positioned above the sixth conductive film and functioning as a common electrode for the display element, The first conductive film comprises at least one of aluminum, titanium, chromium, nickel, copper, yttrium, zirconium, molybdenum, silver, tantalum, and tungsten. Each of the third conductive film and the fourth conductive film comprises a light-transmitting conductive material. Each of the second conductive film and the fifth conductive film has light-shielding properties. In a plan view, the fifth conductive film intersects with the second conductive film. Display device.

3. A display device having a pixel portion comprising: a first transistor having a top gate structure; a display element having a pixel electrode electrically connected to either the source electrode or the drain electrode of the first transistor; and a capacitive element, The oxide semiconductor film having the channel formation region of the first transistor, A first conductive film having a region that overlaps with the oxide semiconductor film and functioning as the gate electrode of the first transistor, A second conductive film is electrically connected to the first conductive film and functions as a first wiring, A first insulating film having a region positioned above the oxide semiconductor film, A third conductive film is electrically connected to the oxide semiconductor film through a first opening in the first insulating film and functions as the other of the source electrode or drain electrode of the first transistor, A fourth conductive film is electrically connected to the oxide semiconductor film through a second opening in the first insulating film, and functions as either the source electrode or the drain electrode of the first transistor, and also functions as one electrode of the capacitive element. A fifth conductive film is electrically connected to the third conductive film and functions as a second wiring, A sixth conductive film is electrically connected to the fourth conductive film, has a region positioned above the fourth conductive film, and functions as the pixel electrode. A seventh conductive film having a region located below the sixth conductive film and functioning as the other electrode of the capacitive element, The present invention comprises an eighth conductive film having a region positioned above the sixth conductive film and functioning as a common electrode for the display element, The first conductive film comprises at least one of aluminum, titanium, chromium, nickel, copper, yttrium, zirconium, molybdenum, silver, tantalum, and tungsten. Each of the second conductive film and the fifth conductive film has light-shielding properties. In a plan view, the fifth conductive film intersects with the second conductive film. The fifth conductive film has a region that does not overlap with the third conductive film. Display device.

4. A display device having a pixel portion comprising: a first transistor having a top gate structure; a display element having a pixel electrode electrically connected to either the source electrode or the drain electrode of the first transistor; and a capacitive element, The oxide semiconductor film having the channel formation region of the first transistor, A first conductive film having a region that overlaps with the oxide semiconductor film and functioning as the gate electrode of the first transistor, A second conductive film is electrically connected to the first conductive film and functions as a first wiring, A first insulating film having a region positioned above the oxide semiconductor film, A third conductive film is electrically connected to the oxide semiconductor film through a first opening in the first insulating film and functions as the other of the source electrode or drain electrode of the first transistor, A fourth conductive film is electrically connected to the oxide semiconductor film through a second opening in the first insulating film, and functions as either the source electrode or the drain electrode of the first transistor, and also functions as one electrode of the capacitive element. A fifth conductive film is electrically connected to the third conductive film and functions as a second wiring, A sixth conductive film is electrically connected to the fourth conductive film, has a region positioned above the fourth conductive film, and functions as the pixel electrode. A seventh conductive film having a region located below the sixth conductive film and functioning as the other electrode of the capacitive element, The present invention comprises an eighth conductive film having a region positioned above the sixth conductive film and functioning as a common electrode for the display element, The first conductive film comprises at least one of aluminum, titanium, chromium, nickel, copper, yttrium, zirconium, molybdenum, silver, tantalum, and tungsten. Each of the third conductive film and the fourth conductive film comprises a light-transmitting conductive material. Each of the second conductive film and the fifth conductive film has light-shielding properties. In a plan view, the fifth conductive film intersects with the second conductive film. The fifth conductive film has a region that does not overlap with the third conductive film. Display device.

5. A display device having a pixel portion comprising: a first transistor having a top gate structure; a display element having a pixel electrode electrically connected to either the source electrode or the drain electrode of the first transistor; and a capacitive element, The oxide semiconductor film having the channel formation region of the first transistor, A first conductive film having a region that overlaps with the oxide semiconductor film and functioning as the gate electrode of the first transistor, A second conductive film is electrically connected to the first conductive film and functions as a first wiring, A first insulating film having a region positioned above the oxide semiconductor film, A third conductive film is electrically connected to the oxide semiconductor film through a first opening in the first insulating film and functions as the other of the source electrode or drain electrode of the first transistor, A fourth conductive film is electrically connected to the oxide semiconductor film through a second opening in the first insulating film, and functions as either the source electrode or the drain electrode of the first transistor, and also functions as one electrode of the capacitive element. A fifth conductive film is electrically connected to the third conductive film and functions as a second wiring, A sixth conductive film is electrically connected to the fourth conductive film, has a region positioned above the fourth conductive film, and functions as the pixel electrode. A seventh conductive film having a region located below the sixth conductive film and functioning as the other electrode of the capacitive element, The present invention comprises an eighth conductive film having a region positioned above the sixth conductive film and functioning as a common electrode for the display element, The first conductive film comprises at least one of aluminum, titanium, chromium, nickel, copper, yttrium, zirconium, molybdenum, silver, tantalum, and tungsten. Each of the second conductive film and the fifth conductive film has light-shielding properties. In a plan view, the fifth conductive film intersects with the second conductive film. The second conductive film does not overlap with the oxide semiconductor film. Display device.

6. A display device having a pixel portion comprising: a first transistor having a top gate structure; a display element having a pixel electrode electrically connected to either the source electrode or the drain electrode of the first transistor; and a capacitive element, The oxide semiconductor film having the channel formation region of the first transistor, A first conductive film having a region that overlaps with the oxide semiconductor film and functioning as the gate electrode of the first transistor, A second conductive film is electrically connected to the first conductive film and functions as a first wiring, A first insulating film having a region positioned above the oxide semiconductor film, A third conductive film is electrically connected to the oxide semiconductor film through a first opening in the first insulating film and functions as the other of the source electrode or drain electrode of the first transistor, A fourth conductive film is electrically connected to the oxide semiconductor film through a second opening in the first insulating film, and functions as either the source electrode or the drain electrode of the first transistor, and also functions as one electrode of the capacitive element. A fifth conductive film is electrically connected to the third conductive film and functions as a second wiring, A sixth conductive film is electrically connected to the fourth conductive film, has a region positioned above the fourth conductive film, and functions as the pixel electrode. A seventh conductive film having a region located below the sixth conductive film and functioning as the other electrode of the capacitive element, The present invention comprises an eighth conductive film having a region positioned above the sixth conductive film and functioning as a common electrode for the display element, The first conductive film comprises at least one of aluminum, titanium, chromium, nickel, copper, yttrium, zirconium, molybdenum, silver, tantalum, and tungsten. Each of the third conductive film and the fourth conductive film comprises a light-transmitting conductive material. Each of the second conductive film and the fifth conductive film has light-shielding properties. In a plan view, the fifth conductive film intersects with the second conductive film. The second conductive film does not overlap with the oxide semiconductor film. Display device.

7. A display device having a pixel portion comprising: a first transistor having a top gate structure; a display element having a pixel electrode electrically connected to either the source electrode or the drain electrode of the first transistor; and a capacitive element, The oxide semiconductor film having the channel formation region of the first transistor, A first conductive film having a region that overlaps with the oxide semiconductor film and functioning as the gate electrode of the first transistor, A second conductive film is electrically connected to the first conductive film and functions as a first wiring, A first insulating film having a region positioned above the oxide semiconductor film, A third conductive film is electrically connected to the oxide semiconductor film through a first opening in the first insulating film and functions as the other of the source electrode or drain electrode of the first transistor, A fourth conductive film is electrically connected to the oxide semiconductor film through a second opening in the first insulating film, and functions as either the source electrode or the drain electrode of the first transistor, and also functions as one electrode of the capacitive element. A fifth conductive film is electrically connected to the third conductive film and functions as a second wiring, A sixth conductive film is electrically connected to the fourth conductive film, has a region positioned above the fourth conductive film, and functions as the pixel electrode. A seventh conductive film having a region located below the sixth conductive film and functioning as the other electrode of the capacitive element, The present invention comprises an eighth conductive film having a region positioned above the sixth conductive film and functioning as a common electrode for the display element, The first conductive film comprises at least one of aluminum, titanium, chromium, nickel, copper, yttrium, zirconium, molybdenum, silver, tantalum, and tungsten. Each of the second conductive film and the fifth conductive film has light-shielding properties. In a plan view, the fifth conductive film intersects with the second conductive film. The fourth conductive film does not overlap with the fifth conductive film. Display device.

8. A display device having a pixel portion comprising: a first transistor having a top gate structure; a display element having a pixel electrode electrically connected to either the source electrode or the drain electrode of the first transistor; and a capacitive element, The oxide semiconductor film having the channel formation region of the first transistor, A first conductive film having a region that overlaps with the oxide semiconductor film and functioning as the gate electrode of the first transistor, A second conductive film is electrically connected to the first conductive film and functions as a first wiring, A first insulating film having a region positioned above the oxide semiconductor film, A third conductive film is electrically connected to the oxide semiconductor film through a first opening in the first insulating film and functions as the other of the source electrode or drain electrode of the first transistor, A fourth conductive film is electrically connected to the oxide semiconductor film through a second opening in the first insulating film, and functions as either the source electrode or the drain electrode of the first transistor, and also functions as one electrode of the capacitive element. A fifth conductive film is electrically connected to the third conductive film and functions as a second wiring, A sixth conductive film is electrically connected to the fourth conductive film, has a region positioned above the fourth conductive film, and functions as the pixel electrode. A seventh conductive film having a region located below the sixth conductive film and functioning as the other electrode of the capacitive element, The present invention comprises an eighth conductive film having a region positioned above the sixth conductive film and functioning as a common electrode for the display element, The first conductive film comprises at least one of aluminum, titanium, chromium, nickel, copper, yttrium, zirconium, molybdenum, silver, tantalum, and tungsten. Each of the third conductive film and the fourth conductive film comprises a light-transmitting conductive material. Each of the second conductive film and the fifth conductive film has light-shielding properties. In a plan view, the fifth conductive film intersects with the second conductive film. The fourth conductive film does not overlap with the fifth conductive film. Display device.

9. A display device having a pixel portion comprising: a first transistor having a top gate structure; a display element having a pixel electrode electrically connected to either the source electrode or the drain electrode of the first transistor; and a capacitive element, The oxide semiconductor film having the channel formation region of the first transistor, A first conductive film having a region that overlaps with the oxide semiconductor film and functioning as the gate electrode of the first transistor, A second conductive film is electrically connected to the first conductive film and functions as a first wiring, A first insulating film having a region positioned above the oxide semiconductor film, A third conductive film is electrically connected to the oxide semiconductor film through a first opening in the first insulating film and functions as the other of the source electrode or drain electrode of the first transistor, A fourth conductive film is electrically connected to the oxide semiconductor film through a second opening in the first insulating film, and functions as either the source electrode or the drain electrode of the first transistor, and also functions as one electrode of the capacitive element. A fifth conductive film is electrically connected to the third conductive film and functions as a second wiring, A sixth conductive film is electrically connected to the fourth conductive film, has a region positioned above the fourth conductive film, and functions as the pixel electrode. A seventh conductive film having a region located below the sixth conductive film and functioning as the other electrode of the capacitive element, The present invention comprises an eighth conductive film having a region positioned above the sixth conductive film and functioning as a common electrode for the display element, The first conductive film comprises at least one of aluminum, titanium, chromium, nickel, copper, yttrium, zirconium, molybdenum, silver, tantalum, and tungsten. Each of the second conductive film and the fifth conductive film has light-shielding properties. In a plan view, the fifth conductive film intersects with the second conductive film. The fifth conductive film has a region that does not overlap with the third conductive film. The fourth conductive film does not overlap with the fifth conductive film. The second conductive film does not overlap with the oxide semiconductor film. Display device.

10. A display device having a pixel portion comprising: a first transistor having a top gate structure; a display element having a pixel electrode electrically connected to either the source electrode or the drain electrode of the first transistor; and a capacitive element, The oxide semiconductor film having the channel formation region of the first transistor, A first conductive film having a region that overlaps with the oxide semiconductor film and functioning as the gate electrode of the first transistor, A second conductive film is electrically connected to the first conductive film and functions as a first wiring, A first insulating film having a region positioned above the oxide semiconductor film, A third conductive film is electrically connected to the oxide semiconductor film through a first opening in the first insulating film and functions as the other of the source electrode or drain electrode of the first transistor, A fourth conductive film is electrically connected to the oxide semiconductor film through a second opening in the first insulating film, and functions as either the source electrode or the drain electrode of the first transistor, and also functions as one electrode of the capacitive element. A fifth conductive film is electrically connected to the third conductive film and functions as a second wiring, A sixth conductive film is electrically connected to the fourth conductive film, has a region positioned above the fourth conductive film, and functions as the pixel electrode. A seventh conductive film having a region located below the sixth conductive film and functioning as the other electrode of the capacitive element, The present invention comprises an eighth conductive film having a region positioned above the sixth conductive film and functioning as a common electrode for the display element, The first conductive film comprises at least one of aluminum, titanium, chromium, nickel, copper, yttrium, zirconium, molybdenum, silver, tantalum, and tungsten. Each of the third conductive film and the fourth conductive film comprises a light-transmitting conductive material. Each of the second conductive film and the fifth conductive film has light-shielding properties. In a plan view, the fifth conductive film intersects with the second conductive film. The fifth conductive film has a region that does not overlap with the third conductive film. The fourth conductive film does not overlap with the fifth conductive film. The second conductive film does not overlap with the oxide semiconductor film. Display device.

11. In any one of Claims 1 to 10, The seventh conductive film has a third opening in a region that overlaps with the fourth conductive film. The third opening does not overlap with the channel formation region of the first transistor. Display device.

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