| CPC G09G 3/3233 (2013.01) [G09G 2300/0819 (2013.01); G09G 2300/0842 (2013.01); G09G 2310/08 (2013.01); G09G 2320/045 (2013.01)] | 21 Claims |
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1. A display device comprising:
a pixel circuit including a driving element having a gate electrode connected to a first node and a source electrode connected to a second node, a light emitting element connected to the second node, a first switch element that connects a data line charged with a sensing data voltage and the first node based on a scan-on voltage from a gate line, and a second switch element that connects a reference voltage line initialized to have a first ground voltage and the second node based on the scan-on voltage from the gate line;
a gate driver configured to supply a scan signal with the scan-on voltage to the gate line; and
a sensing circuit configured to sense a voltage of the reference voltage line changed by a current flowing through the driving element during a sensing period,
wherein during an initialization period that precedes the sensing period, the scan-on voltage of the scan signal is greater than the sensing data voltage,
during the sensing period, the scan-on voltage of the scan signal is greater than the first ground voltage and less than the sensing data voltage,
during the sensing period, a voltage of the second node that is proportional over time and caused by a constant current is stored in a sensing capacitor that is connected to the reference voltage line.
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