Display device and method of testing the same

A display device comprising:

• a plurality of pixels arranged in a matrix configuration along a plurality of pixel columns and a plurality of pixel rows, each of the plurality of pixels including a plurality of sub-pixels disposed in a display area;
• a plurality of wire pads disposed in a non-display area that is a peripheral area of the display area and disposed on one side of the display area;
• a plurality of fan-out lines connecting the plurality of sub-pixels to the plurality of wire pads;
• a plurality of connection wires, wherein each of the plurality of connection wires connects each of the plurality of wire pads to a corresponding data line extending in a first direction, and a first connection wire of at least one of the plurality of connection wires comprises a first portion disposed in the display area and extending in a second direction crossing the first direction;
• and
• a test unit disposed between the plurality of wire pads and the display area and electrically connected to the plurality of fan-out lines,
• wherein the test unit comprises:
• a plurality of switches, each of the plurality of switches including a gate terminal, a first terminal and a second terminal;
• a test voltage line for supplying a test control signal to the gate terminal of each of the plurality of switches;
• a first control line for supplying a first test data signal to a first terminal of one of the plurality of switches connected to a data line which supplies a data signal to a sub-pixel disposed in an odd numbered pixel column;
• and
• a second control line for supplying a second test data signal to a first terminal of one of the plurality switches connected to a data line which supplies a data signal to a sub-pixel disposed in an even numbered pixel column, and
• wherein the first portion of the first connection wire, which extends in the second direction, directly and physically contacts a first data line of the plurality of data lines, which extends in the first direction, in the display area.

An electronic apparatus comprising a display device,

• wherein the display device comprises:
• a display driver circuit receiving image data;
• a plurality of pixels arranged in a matrix configuration along a plurality of pixel columns and a plurality of pixel rows and receiving the image data, each of the plurality of pixels including a plurality of sub-pixels disposed in a display area;
• a plurality of data lines extending in a first direction to traverse the display area and connected to the plurality of sub-pixels, respectively;
• a plurality of wire pads disposed in a non-display area that is a peripheral area of the display area and disposed on one side of the display area;
• a plurality of fan-out lines extending in the first direction and connected to the plurality of wire pads, respectively;
• a plurality of connection wires, wherein each of the plurality of connection wires connects each of the plurality of wire pads to each of the plurality of data lines, respectively, and a first connection wire of at least one of the plurality of connection wires comprises a first portion disposed in the display area and extending in a second direction crossing the first direction;
• and
• a test unit disposed between the plurality of wire pads and the display area, and electrically connected to the plurality of fan-out lines, wherein the test unit is configured to apply a test voltage to the plurality of fan-out lines to check a short-circuit or an open-circuit in the plurality of fan-out lines,
• wherein the first portion of the first connection wire, which extends in the second direction, directly and physically contacts a first data line of the plurality of data lines, which extends in the first direction, in the display area.