Display device having pixel drive circuits and sensor drive circuits
A display device including: a base layer having a display region and a non-display region; a circuit layer on the base layer; and an element layer on the circuit layer, the element layer including light emitting elements and light receiving elements corresponding to the display region, wherein the circuit layer includes: pixel drive circuits connected to the light emitting elements; sensor drive circuits connected to the light receiving elements; data lines connected to the pixel drive circuits; first readout lines connected to a first group of sensor drive circuits among the sensor drive circuits; second readout lines spaced apart from the first readout lines in a first direction and connected to a second group of sensor drive circuits among the sensor drive circuits; and connecting lines electrically connected with the second readout lines, respectively, in the display region.
1 . A display device comprising:
a base layer having a display region and a non-display region;
a circuit layer on the base layer; and
an element layer on the circuit layer, the element layer including light emitting elements and light receiving elements corresponding to the display region,
wherein the circuit layer includes:
pixel drive circuits connected to the light emitting elements;
sensor drive circuits connected to the light receiving elements;
data lines connected to the pixel drive circuits;
first readout lines connected to a first group of sensor drive circuits among the sensor drive circuits;
second readout lines spaced apart from the first readout lines in a first direction and connected to a second group of sensor drive circuits among the sensor drive circuits; and
connecting lines electrically connected with the second readout lines, respectively, in the display region,
wherein the connecting lines include:
a plurality of vertical connecting lines extending along the first readout lines by lengths of the first readout lines; and
a plurality of horizontal connecting lines extending in the first direction, and
wherein the plurality of horizontal connecting lines electrically connect the plurality of vertical connecting lines to the second readout lines.
2 . The display device of claim 1 , wherein the plurality of horizontal connecting lines and the plurality of vertical connecting lines are on different layers.
3 . The display device of claim 2 , wherein the plurality of vertical connecting lines and the second readout lines are on different layers.
4 . The display device of claim 3 , wherein the plurality of vertical connecting lines and the data lines are on a same layer.
5 . The display device of claim 3 , wherein the circuit layer further comprises:
a bridge contact electrode configured to electrically connect each of the plurality of horizontal connecting lines with a corresponding vertical connecting line among the plurality of vertical connecting lines.
6 . The display device of claim 5 , wherein the bridge contact electrode and the second readout lines are on a same layer.
7 . The display device of claim 1 , wherein the circuit layer further comprises:
a first drive voltage line connected to the pixel drive circuits;
a second drive voltage line connected to the light emitting elements and the light receiving elements; and
a reset voltage line connected to the sensor drive circuits.
8 . The display device of claim 7 , wherein the first and second readout lines, the first drive voltage line, and the reset voltage line are on a same layer.
9 . The display device of claim 7 , wherein the circuit layer further comprises:
a shielding reset line arranged along the reset voltage line and electrically connected with the reset voltage line,
wherein the shielding reset line and the data lines are on a same layer.
10 . The display device of claim 7 , wherein the second drive voltage line includes:
a horizontal drive voltage line extending in the first direction; and
a vertical drive voltage line extending in a second direction crossing the first direction, and
wherein the vertical drive voltage line and the horizontal drive voltage line are on different layers.
11 . The display device of claim 10 , wherein the connecting lines comprise:
a plurality of vertical connecting lines extending along the first readout lines; and
a plurality of horizontal connecting lines extending in the first direction,
wherein the plurality of horizontal connecting lines electrically connect the plurality of vertical connecting lines to the second readout lines, and
wherein the vertical drive voltage line and the plurality of vertical connecting lines are on a same layer.
12 . The display device of claim 1 , wherein the circuit layer further comprises:
a first initialization voltage line connected to the pixel drive circuits and configured to apply a first initialization voltage; and
a second initialization voltage line connected to the pixel drive circuits and configured to apply a second initialization voltage.
13 . The display device of claim 12 , wherein the first initialization voltage line comprises:
a first horizontal initialization voltage line extending in the first direction; and
a first vertical initialization voltage line extending in a second direction crossing the first direction, wherein the first vertical initialization voltage line and the first horizontal initialization voltage line are on different layers.
14 . The display device of claim 13 , wherein the second initialization voltage line comprises:
a second horizontal initialization voltage line extending in the first direction; and
a second vertical initialization voltage line extending in the second direction, wherein the second vertical initialization voltage line and the second horizontal initialization voltage line are on different layers.
15 . The display device of claim 14 , wherein the connecting lines comprise:
a plurality of vertical connecting lines extending along the first readout lines; and
a plurality of horizontal connecting lines extending in the first direction,
wherein the plurality of horizontal connecting lines electrically connect the plurality of vertical connecting lines to the second readout lines, and
wherein the first vertical initialization voltage line, the second vertical initialization voltage line, and the plurality of vertical connecting lines are on a same layer.
16 . The display device of claim 15 , wherein the plurality of horizontal connecting lines and the first horizontal initialization voltage line are on a same layer.
17 . The display device of claim 12 , wherein the light emitting elements comprise:
a first light emitting element configured to output a first color light;
a second light emitting element configured to output a second color light; and
a third light emitting element configured to output a third color light, and
wherein the second initialization voltage line comprises:
a second-first initialization voltage line connected to at least one of the first to third light emitting elements and configured to apply a second-first initialization voltage; and
a second-second initialization voltage line connected to the rest of the first to third light emitting elements and configured to apply a second-second initialization voltage.
18 . The display device of claim 17 , wherein the second-first initialization voltage has a voltage level different from a voltage level of the second-second initialization voltage.
19 . The display device of claim 12 , wherein each of the sensor drive circuits includes:
a reset transistor including a first electrode configured to receive a reset voltage, a second electrode connected with a first sensing node, and a third electrode configured to receive a reset control signal;
an amplifying transistor including a first electrode configured to receive a sensor drive voltage, a second electrode connected with a second sensing node, and a third electrode connected with the first sensing node; and
an output transistor including a first electrode connected with the second sensing node, a second electrode connected with a corresponding readout line, and a third electrode configured to receive an output control signal.
20 . The display device of claim 19 , wherein the second initialization voltage line is connected to the first electrode of the amplifying transistor and applies the second initialization voltage as the sensor drive voltage.
21 . An electronic device comprising:
a display panel including a display region and a non-display region adjacent to the display region;
a driver chip connected to the display panel; and
a sensor chip connected to the display panel,
wherein the display panel includes:
light emitting elements;
light receiving elements;
pixel drive circuits connected to the light emitting elements;
sensor drive circuits connected to the light receiving elements;
data lines connected to the pixel drive circuits;
first readout lines connected to a first group of sensor drive circuits among the sensor drive circuits;
second readout lines spaced apart from the first readout lines in a first direction and connected to a second group of sensor drive circuits among the sensor drive circuits; and
connecting lines electrically connected with the second readout lines, respectively, in the display region,
wherein the data lines are connected to the driver chip, and
wherein the first readout lines are connected to the sensor chip, and the second readout lines are connected to the sensor chip through the connecting lines,
wherein the connecting lines comprise:
a plurality of vertical connecting lines configured to extend along the first readout lines; and
a plurality of horizontal connecting lines configured to extend in the first direction,
wherein the plurality of horizontal connecting lines electrically connect the plurality of vertical connecting lines to the second readout lines,
wherein the display panel further comprises:
a bridge contact electrode configured to electrically connect each of the plurality of horizontal connecting lines with a corresponding vertical connecting line among the plurality of vertical connecting lines.
22 . The electronic device of claim 21 , wherein the driver chip and the sensor chip are adjacent to one side of the display region.
23 . The electronic device of claim 21 ,
wherein the second readout lines are connected to the sensor chip through the plurality of horizontal connecting lines and the plurality of vertical connecting lines.
24 . The electronic device of claim 23 , wherein the plurality of horizontal connecting lines and the plurality of vertical connecting lines are on different layers.
25 . The electronic device of claim 24 , wherein the plurality of vertical connecting lines and the second readout lines are on different layers.
26 . The electronic device of claim 25 , wherein the plurality of vertical connecting lines and the data lines are on a same layer.
27 . The electronic device of claim 21 , wherein the bridge contact electrode and the second readout lines are on a same layer.