Emission control driver and organic light emitting display device having the same

An organic light emitting display device, comprising:

• a display panel that includes a plurality of pixels each being connected to a corresponding scan line of scan lines, a corresponding data line of data lines, and a corresponding emission control line of emission control lines;
• a scan driver that sequentially applies scan signals to the pixels through the scan lines;
• a data driver that applies data voltages to the pixels through the data lines;
• and
• an emission control driver that includes a plurality of stages sequentially applying emission control signals to the pixels through the emission control lines, each of the stages including:
• a first signal processing circuit that receives a first voltage and outputs first and second signals in response to first and second sub-control signals;
• a second signal processing circuit that receives a second voltage having a level higher than a level of the first voltage and outputs third and fourth signals in response to a third sub-control signal, the first signal, and the second signal;
• and
• a third signal processing circuit that receives the first and second voltages and outputs the emission control signal in response to the third and fourth signals, wherein:
• the first signal processing circuit of a first stage among the stages receives a start signal as the first sub-control signal,
• the first signal processing circuit of each stage except the first stage receives the emission control signal output from a previous stage as the first sub-control signal,
• wherein:
• the fourth signal changes from a second level to a third level at a time point at which the third sub-control signal changes from a first level to the second level, and
• the fourth signal changes from the second level to the first level at a time point at which the start signal changes from the second level to the first level, the second level lower than the first level, and the third level lower than the second level.

An emission control driver, comprising:

• a plurality of stages that sequentially outputs emission control signals through emission control lines, each stage including:
• a bi-directional driver that outputs a first input signal or a second input signal as a first sub-control signal in response to a first direction control signal and a second direction control signal;
• a first signal processing circuit that receives a first voltage and outputs a first signal and a second signal in response to the first sub-control signal and a second sub-control signal;
• a second signal processing circuit that receives a second voltage having a level higher than a level of the first voltage and outputs a third signal and a fourth signal in response to a third sub-control signal, the first signal, and the second signal;
• and
• a third signal processing circuit that receives the first voltage and the second voltage and outputs the emission control signal in response to the third signal and the fourth signal, wherein:
• the bi-directional driver of a first stage among the stages receives a start signal as the first input signal,
• the bi-directional driver of a last stage among the stages receives the start signal as the second input signal,
• the bi-directional driver of each stage except the first stage receives the emission control signal output from a previous stage as the first input signal and the emission control signal output from a next stage as the second input signal,
• wherein:
• the fourth signal changes from a second level to a third level at a time point at which the third sub-control signal changes from a first level to the second level, and
• the fourth signal changes from the second level to the first level at a time point at which the start signal changes from the second level to the first level, the second level lower than the first level, and the third level lower than the second level.

An emission control driver, comprising:

• a plurality of stages that sequentially outputs emission control signals through emission control lines, each stage including:
• a bi-directional driver that outputs a first input signal or a second input signal as a first sub-control signal in response to first and second direction control signals;
• a first signal processing circuit that receives a first voltage and outputs first and a second signals in response to the first sub-control signal and a second sub-control signal;
• a second signal processing circuit that receives a second voltage having a level higher than a level of the first voltage and outputs a third signal, a fourth signal, and a carry signal in response to a third sub-control signal, the first signal, and the second signal;
• and
• a third signal processing circuit that receives the first and second voltages and outputs the emission control signal in response to the third and fourth signals, wherein:
• the bi-directional driver of a first stage among the stages receives a start signal as the first input signal,
• the bi-directional driver of a last stage among the stages receives the start signal as the second input signal,
• the bi-directional driver of each stage except the first stage receives the carry signal output from a previous stage as the first input signal and the carry signal output from a next stage as the second input signal,
• wherein:
• the fourth signal changes from a second level to a third level at a time point at which the third sub-control signal changes from a first level to the second level, and
• the fourth signal changes from the second level to the first level at a time point at which the start signal changes from the second level to the first level, the second level lower than the first level, and the third level lower than the second level.