Driving circuit and display device including the same, and electronic device
A driving circuit includes an emission driver including emission stage circuits, a compensation driver including compensation stage circuits to generate a compensation scan signal, an initialization driver including initialization stage circuits to generate an initialization scan signal, and an output controller including control stage circuits having a first control transistor and a second control transistor, which are connected in series between a main power input terminal and an output terminal, and a third control transistor and a fourth control transistor, which are connected in series between the output terminal and a second power input terminal. Each of the emission stage circuits may include an emission output unit outputting an emission control signal in response to a voltage of each of a first node and a second node, and a first emission transistor connected between a third node and an input terminal.
1 . A driving circuit comprising:
an emission driver including a plurality of emission stage circuits, each of the plurality of emission stage circuits including an emission output unit outputting an emission control signal in response to a voltage of each of a first node and a second node, and a first emission transistor connected between a third node electrically connected to the first node and an input terminal;
a compensation driver including a plurality of compensation stage circuits to generate a compensation scan signal;
an initialization driver including a plurality of initialization stage circuits to generate an initialization scan signal; and
an output controller including a plurality of control stage circuits, each of the plurality of control stage circuits including a first control transistor and a second control transistor, which are connected in series between a main power input terminal and an output terminal, and a third control transistor and a fourth control transistor, which are connected in series between the output terminal and a second power input terminal,
wherein the second control transistor and the third control transistor are turned on or turned off in response to an enable signal and output a masking signal which controls an output of the compensation scan signal and the initialization scan signal.
2 . The driving circuit of claim 1 , wherein a gate electrode of the first control transistor included in an i-th (i is a natural number of 1 or more) control stage circuit is connected to a third node of an i-th emission stage circuit, and a gate electrode of the fourth control transistor in the i-th control stage circuit is connected to a second node of the i-th emission stage circuit.
3 . The driving circuit of claim 1 , wherein each of the plurality of control stage circuits further includes a capacitor connected between the output terminal and a third power input terminal.
4 . The driving circuit of claim 1 , wherein each of the third control transistor and the fourth control transistor includes a body electrode, and the body electrode of each of the third control transistor and the fourth control transistor is connected to a third power input terminal.
5 . The driving circuit of claim 4 , wherein a logic high level voltage is input to the main power input terminal, and a logic low level voltage is input to the second power input terminal and the third power input terminal.
6 . The driving circuit of claim 5 , wherein a voltage input to the second power input terminal is higher than a voltage input to the third power input terminal.
7 . The driving circuit of claim 1 , wherein each of the first control transistor and the second control transistor is a P-type transistor, and each of the third control transistor and the fourth control transistor is an N-type transistor.
8 . The driving circuit of claim 1 , wherein each of the plurality of emission stage circuits outputs a high level emission control signal when the first node and the third node have a logic high level voltage, and the second node has a logic low level voltage.
9 . The driving circuit of claim 1 , wherein each of the plurality of compensation stage circuits and the plurality of initialization stage circuits includes:
a first output unit configured to output a carry signal in response to a voltage of each of a first control node and a second control node;
a second output unit configured to output the compensation scan signal or the initialization scan signal in response to a voltage of each of the first control node and a third control node; and
a masking unit connected between the second control node and the third control node, the masking unit controlling an electrical connection between the second control node and the third control node in response to the masking signal.
10 . The driving circuit of claim 9 , wherein the masking unit includes:
a first masking transistor connected between the second control node and the third control node, the first masking transistor including a gate electrode receiving the masking signal; and
a second masking transistor connected between the main power input terminal and the third control node, the second masking transistor including a gate electrode receiving the masking signal,
wherein the first masking transistor is a P-type transistor, and the second masking transistor is an N-type transistor.
11 . A display device comprising:
a display unit including pixels connected to scan lines, emission control lines, and data lines;
an emission driver including emission stage circuits to supply an emission control signal to each of the emission control lines;
a compensation driver including compensation stage circuits to supply a compensation scan signal to each of compensation scan lines among the scan lines;
an initialization driver including initialization stage circuits to supply an initialization scan signal to each of initialization scan lines among the scan lines;
a timing controller configured to control the emission driver, the compensation driver, and the initialization driver; and
an output controller including control stage circuits, each of the control stage circuits outputting a masking signal to the compensation driver or the initialization driver, to control an output of the compensation scan signal or the initialization scan signal, in response to an internal voltage of the emission stage circuits and an enable signal supplied from the timing controller.
12 . The display device of claim 11 , wherein the display unit is divided into a plurality of areas, and the timing controller drives the plurality of areas at different driving frequencies by controlling the enable signal to have a first level or a second level.
13 . The display device of claim 11 , wherein each of the emission stage circuits includes an emission output unit outputting the emission control signal in response to a voltage of each of a first node and a second node, and a first emission transistor connected between a third node electrically connected to the first node and an input terminal.
14 . The display device of claim 13 , wherein an i-th (i is a natural number of 1 or more) control stage circuit outputs the masking signal which controls the output of the compensation scan signal of an i-th compensation stage circuit and the initialization scan signal of an i-th initialization stage circuit in response to a voltage of each of the second node and the third node of an i-th emission stage circuit and a voltage of the enable signal.
15 . The display device of claim 14 , wherein the i-th control stage circuit includes:
a first control transistor and a second control transistor, connected in series between a main power input terminal and an output terminal to which the masking signal is output;
a third control transistor and a fourth control transistor, connected in series between the output terminal and a second power input terminal; and
a capacitor connected between the output terminal and a third power input terminal,
wherein a gate electrode of the first control transistor is connected to the third node of the i-th emission stage circuit, and
a gate electrode of the fourth control transistor is connected to the second node of the i-th emission stage circuit.
16 . The display device of claim 15 , wherein a gate electrode of each of the second control transistor and the third control transistor is supplied with the enable signal.
17 . The display device of claim 15 , wherein each of the third control transistor and the fourth control transistor includes a body electrode, and the body electrode of each of the third control transistor and the fourth control transistor is connected to the third power input terminal, and
wherein a voltage of a second power source supplied to the second power input terminal is higher than a voltage of a third power source supplied to the third power input terminal.
18 . The display device of claim 15 , wherein each of the first control transistor and the second control transistor is a P-type transistor, and each of the third control transistor and the fourth control transistor is an N-type transistor.
19 . The display device of claim 14 , wherein each of the compensation stage circuits and the initialization stage circuits includes:
a first output unit configured to output a carry signal in response to a voltage of each of a first control node and a second control node;
a second output unit configured to output the compensation scan signal or the initialization scan signal in response to a voltage of each of the first control node and a third control node; and
a masking unit connected between the second control node and the third control node, the masking unit controlling an electrical connection between the second control node and the third control node in response to the masking signal.
20 . The display device of claim 19 , wherein the masking unit includes:
a first masking transistor connected between the second control node and the third control node, the first masking transistor including a gate electrode receiving the masking signal; and
a second masking transistor connected between the main power input terminal and the third control node, the second masking transistor including a gate electrode receiving the masking signal,
wherein the first masking transistor is a P-type transistor, and the second masking transistor is an N-type transistor.
21 . An electronic device comprising:
a display panel including pixels, the display panel having a plurality of areas;
an emission driver including emission stage circuits to supply an emission control signal to each of emission control signal lines;
a controller configured to supply an enable signal;
a gate driver including a compensation driver including compensation stage circuits to supply a compensation scan signal to each of compensation scan lines, and an initialization driver including initialization stage circuits to supply an initialization scan signal to each of initialization scan lines; and
an output controller including control stage circuits controlling an output of the compensation scan signal and the initialization scan signal in response to an internal voltage of the emission stage circuits and an enable signal supplied to the timing controller,
wherein each of the control stage circuits includes a first control transistor and a second control transistor, which are connected in series between a main power input terminal and an output terminal, and a third control transistor and a fourth control transistor, which are connected in series between the output terminal and a second power input terminal.
22 . The electronic device of claim 21 ,
wherein the electronic device is one of a mobile phone, a tablet, a mobile communication terminal, an electronic notebook, an e-book, a portable multimedia player, a navigation device, an ultra mobile personal computer, a television, a laptop, a monitor, a billboard, an Internet of Things device, a smart watch, a watch phone, glasses, a head mounted display a vehicle dashboard, a vehicle mirror display, or a vehicle entertainment display.