Display apparatus
A display apparatus includes: a substrate including a display area and a peripheral area outside the display area, wherein the substrate is foldable about a folding axis extending in a first direction across the display area; a plurality of pixels in the display area; a first voltage line in the peripheral area; a plurality of second voltage lines in the display area and electrically connected to the first voltage line and the plurality of pixels; a sensing wire adjacent to the folding axis in the display area; and a connection wire in the peripheral area and electrically connected to the sensing wire, wherein the sensing wire comprises a first end and a second end, the first end is electrically connected to the first voltage line, and the second end is electrically connected to the connection wire.
1 . A display apparatus comprising:
a substrate including a display area and a peripheral area outside the display area, wherein the substrate is foldable about a folding axis extending in a first direction across the display area;
a plurality of pixels in the display area;
a first voltage line in the peripheral area;
a plurality of second voltage lines in the display area and electrically connected to the first voltage line and the plurality of pixels;
a sensing wire adjacent to the folding axis in the display area; and
a connection wire in the peripheral area and electrically connected to the sensing wire,
wherein the sensing wire comprises a first end and a second end, the first end is electrically connected to the first voltage line, and the second end is electrically connected to the connection wire.
2 . The display apparatus of claim 1 , wherein the sensing wire has a winding shape.
3 . The display apparatus of claim 1 , wherein the sensing wire comprises a wiring portion having a first width and a pattern portion having a second width greater than the first width.
4 . The display apparatus of claim 1 , wherein each of the plurality of pixels comprises a pixel circuit including transistors and a light-emitting diode electrically connected to the pixel circuit, and
the light-emitting diode comprises a pixel electrode, an opposite electrode on the pixel electrode, and an emission layer between the pixel electrode and the opposite electrode.
5 . The display apparatus of claim 4 , wherein the pixel circuit comprises:
a driving transistor electrically connecting a power line to the pixel electrode;
a data write transistor electrically connecting a data line to the driving transistor; and
a first initialization transistor electrically connecting one of the plurality of second voltage lines to a gate of the driving transistor.
6 . The display apparatus of claim 4 , wherein the pixel circuit comprises:
a driving transistor electrically connecting a power line to the pixel electrode;
a data write transistor electrically connecting a data line to the driving transistor; and
a second initialization transistor electrically connecting one of the second voltage lines to the pixel electrode.
7 . The display apparatus of claim 4 , wherein the first voltage line comprises a first power voltage line electrically connected to a power line or a second power voltage line electrically connected to the opposite electrode.
8 . The display apparatus of claim 1 , wherein the second voltage lines extend in a second direction intersecting the first direction, and
the display apparatus further comprises a plurality of third voltage lines extending in the first direction and electrically connected to the plurality of second voltage lines.
9 . The display apparatus of claim 1 , wherein the sensing wire is stretchable and comprises a material having resistance that changes according to a stretch length.
10 . The display apparatus of claim 9 , wherein the sensing wire comprises conductive nanoparticles and an elastomer.
11 . The display apparatus of claim 1 , further comprising:
a display driving circuit configured to drive the plurality of pixels; and
a sensing circuit electrically connected to the connection wire and configured to detect a folding state by comparing a measured voltage of the sensing wire with a reference voltage,
wherein the display driving circuit comprises:
a data driver configured to supply a data signal to the plurality of pixels;
a gate driver configured to supply scan signals to the plurality of pixels;
a timing controller configured to control an operation timing of the data driver and the gate driver by using a vertical synchronization signal; and
a voltage generator configured to supply the reference voltage and a first voltage.
12 . The display apparatus of claim 11 , wherein the sensing circuit comprises:
a memory storing a lookup table;
a comparator configured to compare the measured voltage with the reference voltage and to output a first value based on the measured voltage being less than or equal to the reference voltage and to output a second value based on the measured voltage being greater than the reference voltage;
a first controller configured to detect the folding state based on an output value of the comparator and to generate sensing data including the folding state; and
a second controller configured to generate a display control signal that controls the plurality of pixels based on the lookup table and the sensing data.
13 . The display apparatus of claim 12 , wherein the first controller is configured to output a voltage control signal that changes the reference voltage based on the output value of the comparator.
14 . The display apparatus of claim 12 , wherein the sensing circuit further comprises a switch configured to electrically connect the sensing wire to an input terminal of the comparator during an on-voltage period of a switch control signal and electrically disconnect the sensing wire from the input terminal of the comparator during an off-voltage period of the switch control signal.
15 . The display apparatus of claim 14 , wherein the on-voltage period of the switch control signal overlaps an on-voltage period of the vertical synchronization signal.
16 . The display apparatus of claim 12 , wherein the display control signal comprises an image control signal configured to rearrange an image displayed by the plurality of pixels according to the folding state.
17 . The display apparatus of claim 12 , wherein the display control signal comprises an image quality control signal configured to compensate for color coordinates or luminance of the plurality of pixels according to the folding state.
18 . A display apparatus comprising:
a substrate including a display area and a peripheral area outside the display area, wherein the substrate is foldable about a first folding axis and a second folding axis which extend in a first direction across the display area;
a plurality of pixels in the display area;
a first voltage line in the peripheral area;
a plurality of second voltage lines in the display area and electrically connected to the first voltage line and the plurality of pixels;
a first sensing wire adjacent to the first folding axis in the display area;
a second sensing wire adjacent to the second folding axis in the display area;
a first connection wire in the peripheral area and electrically connected to the first sensing wire; and
a second connection wire in the peripheral area and electrically connected to the second sensing wire,
wherein a first end of the first sensing wire is electrically connected to the first voltage line, and a second end of the first sensing wire is electrically connected to the first connection wire,
and a first end of the second sensing wire is electrically connected to the first voltage line and a second end of the second sensing wire is electrically connected to the second connection wire.
19 . The display apparatus of claim 18 , further comprising:
a display driving circuit configured to drive the plurality of pixels by using a vertical synchronization signal; and
a sensing circuit electrically connected to the first connection wire and the second connection wire, and configured to detect a folding state of the substrate by comparing, during an on-voltage period of the vertical synchronization signal, a measured voltage of the first sensing wire with a first reference voltage, and comparing a measured voltage of the second sensing wire with a second reference voltage.