Electroluminescent device and method of driving the same

A method of driving an electroluminescent device having a plurality of unit pixels at crossing areas of data lines and scan lines, each unit pixel including red, green and blue sub-pixels connected to a same scan line, comprising:

• applying a first pre-charge current to data lines corresponding to all of the red sub-pixels of all of the unit pixels connected to the same scan line simultaneously during a first time period;
• applying a second pre-charge current to data lines corresponding to all of the green sub-pixels of all of the unit pixels connected to the same scan line simultaneously during a second time period after the first time period;
• applying a third pre-charge current to data lines corresponding to all of the blue sub-pixels of all of the unit pixels connected to the same scan line simultaneously during a third time period after the second time period;
• and
• applying a data current to the pre-charged data lines of the first to third sub-pixels,
• wherein the data current applied to the red sub-pixels is applied during the second time period, after the first time period, and is overlapped with the pre-charge current applied to the green sub-pixels, the data current applied to the green sub-pixels is applied during the third time period, after the second time period, and is overlapped with the pre-charge current applied to the blue sub-pixels, and the data current applied to the blue sub-pixels is applied after the third time period.

An electroluminescent device, comprising:

• a plurality of scan lines in a first direction;
• a plurality of data lines in a second direction different from the first direction;
• a plurality of unit pixels including a corresponding scan line and a corresponding data line, each unit pixel including red, green and blue sub-pixels connected to a same scan line,
• a pre-charge driving circuit which applies pre-charge current to the data lines of each of the plurality of unit pixels connected to the same scan line prior to applying a data current to a corresponding unit pixel, the pre-charge current including a first pre-charge current for the red sub-pixels, a second pre-charge current for the green sub-pixels, and a third pre-charge current for the blue sub-pixels;
• and
• a data driving circuit which applies the data current to the pre-charged data lines, wherein the first pre-charge current is applied to all of the red sub-pixels of all of the unit pixels connected to the same scan line simultaneously during a first time period, then the second pre-charge current is applied to all of the green sub-pixels of all of the unit pixels connected to the same scan line simultaneously during a second time period after the first time period, and then the third pre-charge is applied to all of the blue sub-pixels of all of the unit pixels connected to the same scan line simultaneously during a third time period after the second time period,
• wherein the data current applied to the red sub-pixels is applied during the second time period, after the first time period, and is overlapped with the pre-charge current applied to the green sub-pixels, the data current applied to the green sub-pixels is applied during the third time period, after the second time period, and is overlapped with the pre-charge current applied to the blue sub-pixels, and the data current applied to the blue sub-pixels is applied after the third time period.

A method of driving an electroluminescent device having a plurality of unit pixels at crossing areas of data lines and scan lines, each unit pixel including red, green and blue sub-pixels connected to a same scan line, comprising:

• applying a first pre-charge waveform to the data lines corresponding to all of the red sub-pixels of all of the unit pixels connected to the same scan line simultaneously during a first time period;
• applying a second pre-charge waveform to the data lines corresponding to all of the green sub-pixels of all of the unit pixels connected to the same scan line simultaneously during a second time period after the first time period;
• applying a third pre-charge waveform to the data lines corresponding to all of the blue sub-pixels of all of the unit pixels connected to the same scan line simultaneously during a third time period after the second time period,
• wherein the first to third pre-charge waveforms include a corresponding non-precharging period followed by a corresponding pre-charging period, wherein a starting time of the second pre-charge waveform is overlapped with an ending time of the first pre-charge waveform, and wherein a starting time of the third pre-charge waveform is overlapped with an ending time of the second pre-charge waveform, and
• wherein a data current applied to the red sub-pixels is applied during the second time period, after the first time period, and is overlapped with the pre-charge current applied to the green sub-pixels, a data current applied to the green sub-pixels is applied during the third time period, after the second time period, and is overlapped with the pre-charge current applied to the blue sub-pixels, and a data current applied to the blue sub-pixels is applied after the third time period.