Static electricity protection circuit, electro-optic device and electronic device
In a static electricity protection circuit according to the invention, a first wiring is electrically connected to a drain of a first p-type transistor and a gate and a source of a first n-type transistor; a second wiring is electrically connected to a gate and a source of the first p-type transistor, a drain of the first n-type transistor, a drain of a second p-type transistor and a gate and a source of a second n-type transistor; and a third wiring is electrically connected to a gate and a source of the second p-type transistor and a drain of the second n-type transistor.
1. An electro-optic device comprising:
a scanning line;
a data line;
a pixel;
a scanning line driving circuit; and
a static electricity protection circuit,
wherein the static electricity protection circuit includes
a first p-type transistor;
a first n-type transistor;
a second p-type transistor;
a second n-type transistor;
a first wiring line that supplies a first electric potential;
a second wiring line connected to the scanning line driving circuit; and
a third wiring line that supplies a second electric potential higher than the first electric potential,
wherein
the first p-type transistor is disposed between the first wiring line and the second wiring line, and a gate of the first p-type transistor and one of a source and a drain of the first p-type transistor are connected to the second wiring line,
the first n-type transistor is disposed between the first wiring line and the second wiring line, and a gate of the first n-type transistor and one of a source and a drain of the first n-type transistor are connected to the first wiring line,
the second p-type transistor is disposed between the third wiring line and the second wiring line, a gate of the second p-type transistor and one of a source and a drain of the second p-type transistor are connected, and the other one of the source and the drain of the second p-type transistor is connected to the second wiring line, and
the second n-type transistor is disposed between the third wiring line and the second wiring line, a gate of the second n-type transistor and one of a source and a drain of the second n-type transistor are connected, and the other one of the source and the drain of the second n-type transistor is connected to the third wiring line.
2. An electronic device comprising the electro-optic device according to claim 1 .
3. The electro-optic device according to claim 1 ,
wherein an on-state electric current of the first p-type transistor is the same as a current of the second p-type transistor.
4. The electro-optic device according to claim 1 ,
wherein an on-state electric current of the first n-type transistor is the same as a current of the second n-type transistor.