Display device and method of testing the same

1 . 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 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 connecting the plurality of fan-out lines to the plurality of data lines, respectively, a first connection wire of at least one of the plurality of connection wires comprising 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.

2 . The display device of claim 1 ,

wherein the plurality of sub-pixels comprises red sub-pixels, green sub-pixels, and blue sub-pixels,

the red sub-pixels and the blue sub-pixels are disposed adjacent to one another in the first direction, and the green sub-pixels are arranged in the first direction, and

the red sub-pixels and the green sub-pixels are disposed adjacent to one another in the second direction.

3 . The display device of claim 2 , wherein the plurality of fan-out lines are alternately connected to one of the plurality of connection wires or one of the plurality of data lines.

4 . The display device of claim 3 ,

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 first terminals of the plurality of switches connected to data lines which supply data signals to pixels disposed in an odd numbered pixel columns; and

a second control line for supplying a second test data signal to first terminals of the plurality of switches connected to data lines which supply data signals to pixels disposed in an even numbered pixel columns.

5 . The display device of claim 4 , wherein the first test data signal is a black data voltage and the second test data signal is a white data voltage.

6 . The display device of claim 4 , wherein the second terminals of the plurality of switches are connected to the plurality of data lines via the plurality of fan-out lines.

7 . The display device of claim 6 , wherein the plurality of switches are implemented as transistors, the gate terminal is a gate electrode, the first terminal is a drain electrode, and the second terminal is a source electrode.

8 . The display device of claim 6 , wherein fan-out lines disposed adjacent to each other in the second direction are disposed on different layers.

9 . The display device of claim 4 , further comprising:

a lighting circuit disposed in the non-display area and disposed between the display area and the test unit,

wherein the lighting circuit is located adjacent to the display area.

10 . The display device of claim 9 , wherein the plurality of data lines are connected to the plurality of fan-out lines through the lighting circuit.

11 . The display device of claim 1 , wherein each of the plurality of connection wires further comprises a second portion extending in the first direction.

12 . The display device of claim 11 , wherein the second portion is disposed on a same layer as the plurality of data lines.

13 . 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.

14 . The display device of claim 13 , wherein the second terminals of the plurality of switches are connected to a plurality of data lines, respectively.

15 . The display device of claim 14 , wherein the second terminals of the plurality of switches are connected to the plurality of data lines via the plurality of fan-out lines, respectively.

16 . The display device of claim 15 , wherein the plurality of switches are implemented as transistors, and the gate terminal is a gate electrode, the first terminal is a drain electrode, and the second terminal is a source electrode.

17 . The display device of claim 15 , wherein fan-out lines disposed adjacent to each other are disposed on different layers.

18 . The display device of claim 13 , wherein the first test data signal is a black data voltage and the second test data signal is a white data voltage.

19 . 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.