Transistor, thin-film transistor substrate, and liquid crystal display

4:

• A thin-film transistor substrate that is a thin-film transistor substrate including the transistor according to claim 1, wherein
• said transistor is used in a circuit that drives a pixel transistor that is a transistor corresponding to a pixel in a liquid crystal display,
• said circuit that drives the pixel transistor includes a first transistor, a second transistor, a third transistor, and a capacitor,
• said first transistor has a source electrode connected to one electrode of said capacitor and to a drain electrode of said second transistor,
• said capacitor has the other electrode connected to a gate electrode of said first transistor and to a source electrode of the third transistor,
• at least said third transistor is the transistor according to claim 1, and
• said transistor is formed on a substrate that is the same as said thin-film transistor substrate that is an array substrate on which said pixel transistor is formed.

5:

• A thin-film transistor substrate that is a thin-film transistor substrate including the transistor according to claim 1, wherein
• said transistor is used in an inverter circuit that drives a pixel transistor that is a transistor corresponding to a pixel in a liquid crystal display,
• said inverter circuit that drives the pixel transistor includes a first transistor and a second transistor,
• said first transistor has a source electrode connected to a gate electrode of said first transistor and to a drain electrode of said second transistor,
• said second transistor has a source electrode connected to a power supply potential VSS,
• at least said first transistor is the transistor according to claim 1, and
• said transistor is formed on a substrate that is the same as said thin-film transistor substrate that is an array substrate on which said pixel transistor is formed.

6:

• A thin-film transistor substrate that is a thin-film transistor substrate including the transistor according to claim 1, wherein
• said transistor further comprises:
• an additional protective film formed to cover said source electrode, said drain electrode, said channel protective film, and said gate insulating film;
• and
• a top gate electrode formed in a position on an upper surface of said additional protective film, the position overlapping with said oxide semiconductor layer in plan view,
• said transistor is used in a circuit that drives a pixel transistor that is a transistor corresponding to a pixel in a liquid crystal display,
• said circuit that drives the pixel transistor includes a first transistor, a second transistor, a third transistor, and a capacitor,
• said first transistor has a source electrode connected to one electrode of said capacitor and to a drain electrode of said second transistor,
• said capacitor has the other electrode connected to a gate electrode of said first transistor and to a source electrode of the third transistor,
• at least said first transistor is the transistor according to claim 1,
• said top gate electrode of said first transistor is connected to said gate electrode of said first transistor, and
• said transistor is formed on a substrate that is the same as said thin-film transistor substrate that is an array substrate on which said pixel transistor is formed.

8:

• A thin-film transistor substrate that is a thin-film transistor substrate including a plurality of transistors each being the transistor according to claim 1, wherein
• said plurality of transistors include a transistor that is used to drive a pixel transistor that is a transistor corresponding to a pixel in a liquid crystal display, and a transistor that is used as said pixel transistor,
• said thin-film transistor substrate is an array substrate on which said pixel transistor is formed, and
• said transistor that is used to drive said pixel transistor is formed on a substrate that is the same as said thin-film transistor substrate.

9:

• A liquid crystal display comprising:
• the thin-film transistor substrate according to claim 4;
• an opposite substrate disposed opposite said thin-film transistor substrate;
• a liquid crystal layer that is sandwiched between said thin-film transistor substrate and said opposite substrate;
• and
• a backlight disposed on a side of said thin-film transistor substrate opposite said opposite substrate.