Semiconductor device, display panel and electronic apparatus
A semiconductor device includes a plurality of thin film transistors of a single channel formed on an insulating substrate, and a buffer circuit including an outputting stage; a first inputting stage; a second inputting stage; a seventh thin film transistor; and an eighth thin film transistor.
1. A semiconductor device comprising a buffer circuit made of thin film transistors having a single channel, the buffer circuit comprising:
an input stage configured to receive a set pulse and a reset pulse;
an output stage configured to selectively output a first level signal and a second level signal,
wherein the output stage outputs the first level when the set pulse is applied to the input stage, continuously outputs the first level signal until the reset pulse is applied to the input stage, and outputs the second level signal after the reset pulse is applied to the input stage, and
wherein the set pulse rises to a high level first and then the reset pulse rises to the high level.
2. The semiconductor device according to claim 1 , wherein the output stage further comprises a first transistor and a second transistor serially connected between a first potential line and a second potential line, and a first control wiring and a second control wiring are respectively connected to respective control nodes of the first transistor and the second transistor.
3. The semiconductor device according to claim 2 , wherein the buffer circuit further comprises:
a third transistor connected between the second potential line and the first control wiring; and
a fourth transistor connected between the second potential line and the second control wiring,
wherein respective control nodes of the third transistor and the fourth transistor are respectively connected to the second control wiring and the first control wiring.
4. A display panel comprising:
a pixel array section including a plurality of pixel circuits, and
a control section configured to drive the pixel array section;
at least one of the plurality of pixel circuits including at least one switch transistor, the control section including a plurality of buffer circuits made of thin film transistors having a single channel, at least one of the plurality of buffer circuits comprising:
an input stage configured to receive a set pulse and a reset pulse;
an output stage configured to selectively output a first level signal and a second level signal,
wherein the output stage outputs the first level when the set pulse is applied to the input stage, continuously outputs the first level signal until the reset pulse is applied to the input stage, and outputs the second level signal after the reset pulse is applied to the input stage.
5. The display panel according to claim 4 , wherein the output stage further comprises a first transistor and a second transistor serially connected between a first potential line and a second potential line, and a first control wiring and a second control wiring are respectively connected to respective control nodes of the first transistor and the second transistor.
6. The display panel according to claim 5 , wherein the buffer circuit further comprises:
a third transistor connected between the second potential line and the first control wiring; and
a fourth transistor connected between the second potential line and the second control wiring,
wherein respective control nodes of the third transistor and the fourth transistor are respectively connected to the second control wiring and the first control wiring.