Image display apparatus, and video wall including the same

An image display apparatus comprising:

• a panel including a plurality of light emitting diodes;
• and
• a driving controller configured to output a scan signal and a data signal to the plurality of light emitting diodes,
• wherein the driving controller includes a plurality of data driving integrated circuits configured to output the data signal to the light emitting diode, and
• wherein the data driving integrated circuit includes:
• a current source,
• a switch disposed between the current source and the light emitting diode, and to perform switching, and
• a coupling compensator configured to output a compensation signal for compensating coupling noise caused based on turn-on or turn-off of the switch,
• wherein the coupling compensator outputs the compensation signal increasing from a third level to a fourth level in response to a coupling noise decreasing from a first level to a second level when a control signal is switched from a low level to a high level, and the coupling compensator outputs the compensation signal decreasing from a seventh level to an eighth level in response to the coupling noise increasing from a fifth level to a sixth level when the control signal is switched from a high level to a low level,
• wherein the coupling compensator is disposed between a first node as one node of the current source, into which bias voltage from a bias circuit is input, and a second node as one end of the switch, into which the control signal from the controller is input,
• wherein the coupling compensator includes a buffer configured to output the control signal and a capacitor connected to the buffer, and
• wherein an input node of the buffer is connected to the second node, an output node of the buffer is connected to one end of the capacitor, and the other end of the capacitor is connected to the first node.

A video wall comprising:

• a plurality of image display apparatuses,
• wherein the image display apparatus comprises:
• a panel including a plurality of light emitting diodes;
• a scan driver configured to output a scan signal to the plurality of light emitting diodes;
• a data driver configured to output a data signal to the plurality of light emitting diodes;
• and
• a controller configured to control the data driver,
• wherein the data driver includes a plurality of data driving integrated circuits configured to output the data signal to the light emitting diode, and
• wherein the data driving integrated circuit includes:
• a current source,
• a switch disposed between the current source and the light emitting diode, and to perform switching based on a control signal from the controller, and
• a coupling compensator configured to output a compensation signal for compensating coupling noise caused based on turn-on or turn-off of the switch,
• wherein the coupling compensator outputs the compensation signal increasing from a third level to a fourth level in response to the coupling noise decreasing from a first level to a second level when the control signal is switched from a low level to a high level, and the coupling compensator outputs the compensation signal decreasing from a seventh level to an eighth level in response to the coupling noise increasing from a fifth level to a sixth level when the control signal is switched from a high level to a low level,
• wherein the coupling compensator is disposed between a first node as one node of the current source, into which bias voltage from a bias circuit is input, and a second node as one end of the switch, into which the control signal from the controller is input,
• wherein the coupling compensator includes a buffer configured to output the control signal and a capacitor connected to the buffer, and
• wherein an input node of the buffer is connected to the second node, an output node of the buffer is connected to one end of the capacitor, and the other end of the capacitor is connected to the first node.