Short circuit detector and display device having the same

A display device, comprising:

• a display panel comprising a plurality of pixels connected to a plurality of scan lines and a plurality of data lines, respectively;
• a scan driver configured to supply a scan signal to each of the scan lines;
• a data driver configured to supply a data voltage to each of the data lines;
• a short circuit detector connecting a first portion and a second portion of a target data line among the data lines;
• and
• a timing controller controlling the scan driver, the data driver, and the short circuit detector,
• wherein:
• the short circuit detector is configured to detect a short circuit of the target data line based on a short-circuit test signal;
• and
• the short circuit detector comprises:
• a first transistor connected between the first portion of the target data line and the second portion of the target data line and comprising a gate electrode connected to a first node;
• a second transistor connected between a first voltage source and the first node and comprising a gate electrode configured to receive the short-circuit test signal;
• a third transistor connected between a second node included in the second portion of the target data line and a third node and comprising a gate electrode configured to receive the short-circuit test signal;
• a fourth transistor connected between a second voltage source and the first node and comprising a gate electrode connected to the third node;
• and
• a fifth transistor connected to the first node and a third voltage source and comprising a gate electrode connected to the third node in common with the gate electrode of the third transistor.

A display device, comprising:

• a display panel comprising a plurality of pixels connected to a plurality of scan lines and a plurality of data lines, respectively;
• a scan driver configured to supply a scan signal to each of the scan lines;
• a data driver configured to supply a data voltage to each of the data lines;
• a short circuit detector connecting a first portion and a second portion of a target data line among the data lines;
• and
• a timing controller controlling the scan driver, the data driver, and the short circuit detector,
• wherein:
• the short circuit detector is configured to detect a short circuit of the target data line based on a short-circuit test signal;
• and
• the short circuit detector comprises:
• a plurality of first transistors each connected between the first portion and the second portion of each of a plurality of target data lines and controlled in common based on a voltage of the first node;
• a second transistor connected between a first voltage source and the first node and comprising a gate electrode configured to turn on all the first transistors;
• a plurality of third transistors each connected between the second portion of the target data line and a common node and each comprising a gate electrode configured to receive the short-circuit test signal;
• a fourth transistor connected to a second voltage source and the first node and comprising a gate electrode connected to the common node;
• and
• a fifth transistor connected to the first node and a third voltage source and comprising a gate electrode connected to the third node in common with the gate electrode of the third transistor.