Light emission driving circuit, scan driving circuit and display device including same

A scan driving circuit, comprising:

• a driving circuit configured to output a scan signal to a first output terminal and output a switching signal to a first node in response to a plurality of scan clock signals and a first carry signal;
• and
• a masking circuit configured to output a second carry signal to a second output terminal in response to a masking clock signal, the scan signal, and the switching signal,
• wherein the masking clock signal is a signal which is maintained at a first level during a normal mode and periodically changes during a low power mode.

A display device, comprising:

• a display panel including a plurality of pixels respectively connected to one of a plurality of data lines, one of a plurality of scan lines, and one of a plurality of light emission lines;
• a data driving circuit configured to drive the plurality of data lines;
• a scan driving circuit configured to drive the plurality of scan lines;
• a light emission driving circuit configured to drive the plurality of light emission lines;
• and
• a driving controller configured to receive an image signal and a control signal and control the data driving circuit, the scan driving circuit, and the light emission driving circuit such that an image is displayed on the display panel, wherein:
• the driving controller divides the display panel into a first display region and a second display region based on the image signal and outputs a first masking signal indicating a start position of the second display region;
• and
• the light emission driving circuit includes a plurality of light emission driving stages, each configured to drive a corresponding light emission line among the plurality of light emission lines, wherein each of the plurality of light emission driving stages includes:
• a first driving circuit configured to output a light emission driving signal to a first output terminal and output a first switching signal to a first node in response to a plurality of clock signals from the driving controller and a first carry signal;
• and
• a first masking circuit configured to output a second carry signal to a second output terminal in response to a first masking clock signal, the light emission driving signal, and the first switching signal, wherein the first masking clock signal is maintained at a first level during a normal mode and periodically changes during a low power mode.

A display device, comprising:

• a display panel comprising a plurality of pixels;
• a light emission driving circuit configured to drive a plurality of light emission lines connected to the plurality of pixels;
• and
• a driving controller configured to receive an image signal, control the light emission driving circuit, divide the display panel into a first display region and a second display region based on the image signal, and output a masking signal indicating a start position of the second display region,
• wherein the light emission driving circuit comprises a plurality of light emission driving stages, each configured to drive a corresponding light emission line among the plurality of light emission lines, wherein each of the plurality of light emission driving stages comprises:
• a driving circuit configured to output a light emission driving signal to a first output terminal and output a first switching signal to a first node in response to a plurality of clock signals from the driving controller and a first carry signal;
• and
• a masking circuit configured to output a second carry signal to a second output terminal in response to a first masking clock signal, the light emission driving signal, and the first switching signal, wherein the first masking clock signal is maintained at a first level during a normal mode and periodically changes during a low power mode.