Stage circuit, display device including the stage circuit, and electronic device including the display device
A stage circuit that includes a driver configured to receive a start signal and generate a first signal and an inverted first signal using a first clock signal and a second clock signal, and a first generator configured to generate a second signal using a previous stage first signal and a previous stage inverted first signal supplied from a driver of a previous stage circuit, and a next stage first signal supplied from a driver of a next stage circuit. The driver and the first generator may be electrically connected to a first power input terminal to which first power is may be input and a second power input terminal to which second power is may be input.
1 . A stage circuit comprising:
a driver of a current stage circuit configured to receive a start signal and generate a first signal and an inverted first signal using a first clock signal and a second clock signal; and
a first generator of the current stage circuit configured to generate a second signal using a previous stage first signal, which is phase-advanced from the first signal and is supplied from a driver of a previous stage circuit, and a previous stage inverted first signal, which is phase-inverted from the previous stage first signal and is supplied from the driver of the previous stage circuit, and a next stage first signal, which is phase-delayed from the first signal and is supplied from a driver of a next stage circuit,
wherein the driver and the first generator are connected to a first power input terminal to which first power is input and a second power input terminal to which second power is input.
2 . The stage circuit of claim 1 , wherein the first clock signal and the second clock signal have a same period and have opposite phases.
3 . The stage circuit of claim 1 , wherein the driver comprises:
an input portion configured to control a voltage of a first node using the start signal, the first clock signal, and the second clock signal;
a first output portion connected to the first power input terminal and the second power input terminal and configured to control a voltage of a first output terminal in response to the voltage of the first node; and
a second output portion connected to the first power input terminal and the second power input terminal and configured to control a voltage of a second output terminal in response to the voltage of the first output terminal.
4 . The stage circuit of claim 3 , wherein
the first output terminal outputs the inverted first signal, and
the second output terminal outputs the first signal.
5 . The stage circuit of claim 3 , wherein
the input portion comprises a first transistor and a second transistor connected in parallel between a first input terminal to which the start signal is input and the first node,
a gate electrode of the first transistor is connected to a second input terminal to which the first clock signal is input, and
a gate electrode of the second transistor is connected to a third input terminal to which the second clock signal is input.
6 . The stage circuit of claim 5 , wherein the first transistor is an N-type transistor and the second transistor is a P-type transistor.
7 . The stage circuit of claim 3 , wherein each of the first output portion and the second output portion is an inverter.
8 . The stage circuit of claim 3 , wherein
the first output portion comprises a third transistor and a fourth transistor connected in series between the first power input terminal and the second power input terminal,
the third transistor is a P-type transistor, and the fourth transistor is an N-type transistor,
a gate electrode of the third transistor and a gate electrode of the fourth transistor are connected to the first node, and
a common node between the third transistor and the fourth transistor is connected to the first output terminal.
9 . The stage circuit of claim 3 , wherein
the second output portion comprises a fifth transistor and a sixth transistor connected in series between the first power input terminal and the second power input terminal,
the fifth transistor is a P-type transistor, and the sixth transistor is an N-type transistor,
a gate electrode of the fifth transistor and a gate electrode of the sixth transistor are connected to the first output terminal, and
a common node between the fifth transistor and the sixth transistor is connected to the second output terminal.
10 . The stage circuit of claim 3 , further comprising:
a first capacitor connected between the first node and the second power input terminal.
11 . The stage circuit of claim 1 , wherein the first generator comprises:
a controller configured to control a voltage of a first node using a first input signal supplied to a first signal input terminal and a second input signal supplied to a second signal input terminal; and
an output portion outputting the second signal to an output terminal in response to a third input signal supplied to a third signal input terminal and the voltage of the first node.
12 . The stage circuit of claim 11 , wherein
the first input signal is the next stage first signal,
the second input signal is the previous stage inverted first signal, and
the third input signal is the previous stage first signal.
13 . The stage circuit of claim 11 , wherein the controller comprises:
a first transistor connected between the first power input terminal and the first node and having a gate electrode connected to the first signal input terminal, the first transistor being P-type; and
a second transistor connected between the first node and the second power input terminal and having a gate electrode connected to the second signal input terminal, the second transistor being N-type.
14 . The stage circuit of claim 11 , wherein the output portion comprises:
a third transistor electrically connected between the first power input terminal and the output terminal and having a gate electrode electrically connected to the third signal input terminal, the third transistor being P-type; and
a fourth transistor electrically connected between the output terminal and the second power input terminal and having a gate electrode electrically connected to the first node, the fourth transistor being N-type.
15 . The stage circuit of claim 11 , wherein the output portion further comprises a second capacitor electrically connected between the first node and the second power input terminal.
16 . The stage circuit of claim 1 , wherein
the first power is set to a high level voltage, and the second power is set to a low level voltage lower than that of the first power.
17 . The stage circuit of claim 11 , further comprising:
a second generator, the second generator and the first generator comprising a same circuit,
wherein the second generator is configured to output a third signal using a fourth input signal input to a fourth signal input terminal, a fifth input signal input to a fifth signal input terminal, and a sixth input signal input to a sixth signal input terminal.
18 . The stage circuit of claim 17 , wherein
the fourth input signal is different from the first input signal,
the fifth input signal is different from the second input signal, and
the sixth input signal is different from the third input signal.
19 . A display device comprising:
a plurality of pixels electrically connected to a plurality of scan lines, a plurality of emission control lines, and a plurality of data lines; and
a scan/emission driver comprising:
a plurality of stage circuits configured to drive at least one of the plurality of scan lines and at least one of the plurality of emission control lines,
a plurality of first dummy stage circuits positioned at a front stage of the plurality of stage circuits, and
a plurality of second dummy stage circuits positioned at a back stage of the plurality of stage circuits, wherein
an i-th stage circuit among the plurality of stage circuits comprises:
a driver configured to receive a start signal and generate a first signal and an inverted first signal using a first clock signal, and a second clock signal; and
a generator configured to generate a second signal using a previous stage first signal, which is phase-advanced from the first signal and is supplied from a driver of a previous stage circuit and a previous stage inverted first signal, which is phase-inverted from the previous stage first signal and is supplied from the driver of the previous stage circuit, and a next stage first signal, which is phase-delayed from the first signal and is supplied from a driver of a next stage circuit,
wherein the start signal is a first signal of an (i-1)-th stage circuit,
wherein the first signal is a first scan signal supplied to an i-th first scan line, and
wherein the second signal is a second signal supplied to an i-th second scan line or an emission control signal supplied to an i-th emission control line.
20 . An electronic device comprising:
a display module comprising a gate driver and a display panel that comprises a plurality of pixels that display an image;
a processor configured to supply data corresponding to the image to the display module;
wherein
the gate driver comprises:
a plurality of stage circuits,
a plurality of first dummy stage circuits positioned at a front stage of the plurality of stage circuits, and
a plurality of second dummy stage circuits positioned at a back stage of the plurality of stage circuits to supply at least one of a scan signal and an emission control signal to the plurality of pixels included in the display panel,
an i-th stage circuit among the plurality of stage circuits comprises:
a driver configured to receive a start signal and generate a first signal and an inverted first signal using a first clock signal, and a second clock signal; and
a generator configured to generate a second signal using a previous stage first signal, which is phase-advanced from the first signal and is supplied from a driver of a previous stage circuit, and a previous stage inverted first signal, which is phase-inverted from the previous stage first signal and is supplied from the driver of the previous stage circuit, and a next stage first signal, which is phase-delayed from the first signal and is supplied from a driver of a next stage circuit,
wherein the start signal is a first signal of an (i-1)-th stage circuit,
wherein the first signal is a first scan signal supplied to an i-th first scan line, and
wherein the second signal is a second signal supplied to an i-th second scan line or an emission control signal supplied to an i-th emission control line.