Display device
A display device is disclosed that includes a plurality of pixels and plurality of sensors. Each of the plurality of pixels includes a light emitting element. The plurality of sensors include first sensors disposed in a first area and second sensors disposed in a second area. Each of the plurality of sensors includes a light receiving element. The scan driver supplies a plurality of scan signals to the plurality of pixels and the plurality of sensors. In response to the plurality of scan signals, the readout circuit receives a first sensing signal from the first sensors, receives a second sensing signal from the second sensors, and removes noise from the first sensing signal using the second sensing signal to produce a final sensing signal.
1. A display device comprising:
a display panel including a plurality of pixels and a plurality of sensors, each of the plurality of pixels includes a light emitting element, the plurality of sensors include first sensors disposed in a first area and second sensors disposed in a second area, each of the plurality of sensors includes a light receiving element;
a scan driver configured to supply a plurality of scan signals to the plurality of pixels and the plurality of sensors; and
a readout circuit configured to:
in response to the plurality of scan signals,
receive a first sensing signal from the first sensors;
receive a second sensing signal from the second sensors; and
remove noise from the first sensing signal using the second sensing signal to produce a final sensing signal.
2. The display device of claim 1 , wherein the first area is an effective sensing area for sensing information of a user, and
wherein the second area is a noise sensing area for sensing the noise.
3. The display device of claim 2 , wherein the second area is spaced apart from the first area and does not overlap the effective sensing area.
4. The display device of claim 3 , wherein the readout circuit calculates the final sensing signal by subtracting the second sensing signal from the first sensing signal.
5. The display device of claim 3 , wherein the readout circuit includes:
an offset storage configured to store a predetermined offset signal, and
wherein the readout circuit calculates a final noise signal by subtracting the offset signal from the second sensing signal, and calculates the final sensing signal by subtracting the final noise signal from the first sensing signal.
6. The display device of claim 1 , wherein the first area is an effective sensing area for sensing information of a user, and
wherein the second area is a noise sensing area is adjacent to the effective sensing area and surrounds the effective sensing area.
7. The display device of claim 6 , wherein the second area does not overlap the effective sensing area.
8. The display device of claim 7 , wherein the readout circuit calculates the final sensing signal by subtracting the second sensing signal from the first sensing signal.
9. The display device of claim 7 , wherein the readout circuit includes:
an offset storage configured to store a predetermined offset signal,
wherein the readout circuit calculates a final noise signal by subtracting the offset signal from the second sensing signal, and calculates the final sensing signal by subtracting the final noise signal from the first sensing signal.
10. The display device of claim 1 , wherein the first sensors output the first sensing signal, and
wherein the second sensors output the second sensing signal.
11. The display device of claim 10 , wherein each of the first sensors or each of the second sensors includes:
a sensor driving circuit connected to the light receiving element, and
wherein the sensor driving circuit includes:
an output transistor configured to receive one of the plurality of scan signals as an output control signal and to output the first sensing signal or the second sensing signal to a readout line in response to the output control signal.
12. An electronic device comprising:
a display panel including a plurality of pixels and a plurality of sensors, each of the plurality of pixels includes a light emitting element, each of the plurality of sensors includes a light receiving element;
an input sensing layer positioned on the display panel and configured to sense an input and to output an input sensing signal;
a scan driver configured to supply a plurality of scan signals to the plurality of pixels and the plurality of sensors; and
a main controller configured to:
set a first area and a second area of the display panel using the input sensing signal;
receive a first sensing signal from first sensors positioned in the first area among the plurality of sensors in response to some of the plurality of scan signals;
receive a second sensing signal from second sensors positioned in the second area among the plurality of sensors in response to some of the plurality of scan signals; and
remove noise from the first sensing signal using the second sensing signal to produce a final sensing signal.
13. The electronic device of claim 12 , wherein the first area is an effective sensing area for sensing information of a user, and
wherein the second area is a noise sensing area for sensing the noise, and
wherein the second area is determined from the input sensing signal as an area in which no input is sensed.
14. The electronic device of claim 13 , wherein the second area does not overlap the effective sensing area.
15. The electronic device of claim 14 , wherein the main controller calculates the final sensing signal by subtracting the second sensing signal from the first sensing signal.
16. The electronic device of claim 14 , wherein the main controller includes:
an offset storage configured to store a predetermined offset signal, and
wherein the main controller calculates a final noise signal by subtracting the offset signal from the second sensing signal, and calculates the final sensing signal by subtracting the final noise signal from the first sensing signal.
17. The electronic device of claim 13 , wherein the second area does not overlap the effective sensing area.
18. The electronic device of claim 17 , wherein the main controller calculates the final sensing signal by subtracting the second sensing signal from the first sensing signal.
19. The display device of claim 17 , wherein the main controller further includes:
an offset storage configured to store a predetermined offset signal, and
wherein the main controller calculates a final noise signal by subtracting the offset signal from the second sensing signal, and calculates the final sensing signal by subtracting the final noise signal from the first sensing signal.
20. The electronic device of claim 12 , wherein the first sensors output the first sensing signal,
wherein the second sensors output the second sensing signal,
wherein each of the plurality of sensors includes:
a sensor driving circuit connected to the light receiving element, and
wherein the sensor driving circuit includes:
an output transistor configured to receive one of the plurality of scan signals as an output control signal and to output the first sensing signal or the second sensing signal to a readout line in response to the output control signal.