Display device and driving method of the same

1. A display device comprising:

a display panel comprising:

a plurality of pixels, each of the plurality of pixels including a light emitting element; and

a plurality of sensors, each of the plurality of sensors including a light sensing element;

a panel driving circuit configured to drive the plurality of pixels;

a readout circuit configured to receive a sensing signal from the plurality of sensors; and

a controller configured to control the panel driving circuit and the readout circuit,

wherein the controller is configured to:

control the panel driving circuit to set a luminance of pixels in an emission area from among the plurality of pixels to a first luminance level in a fingerprint sensing mode; and

control the panel driving circuit to set the luminance of the pixels in the emission area to a second luminance level in a blood pressure sensing mode, and

wherein the second luminance level is higher than the first luminance level.

2. The display device of claim 1 , wherein, during a first emission and blood pressure sensing period of the blood pressure sensing mode, the controller is configured to measure a blood pressure of a user based on a readout signal received from the readout circuit.

3. The display device of claim 2 , wherein, when the blood pressure cannot be sufficiently measured based on the readout signal during the first emission and blood pressure sensing period, the controller is configured to change the luminance of the pixels in the emission area to a luminance level higher than the second luminance level during a second emission and blood pressure sensing period of the blood pressure sensing mode.

4. The display device of claim 3 , wherein, during the second emission and blood pressure sensing period of the blood pressure sensing mode, the controller is configured to measure the blood pressure of the user based on the readout signal received from the readout circuit.

5. The display device of claim 1 , wherein, during a first emission and fingerprint sensing period of the fingerprint sensing mode, the controller is configured to perform an authentication process by comparing a readout signal received from the readout circuit with a pre-stored fingerprint signal.

6. The display device of claim 5 , wherein, when the readout signal does not match the pre-stored fingerprint signal, the controller is configured to change the luminance of the pixels in the emission area into a luminance level higher than the first luminance level of the first emission and fingerprint sensing period.

7. The display device of claim 1 , wherein, during a fingerprint sensing time in the fingerprint sensing mode, the readout circuit is configured to receive a sensing signal from sensors in a fingerprint sensing area from among the plurality of sensors,

wherein, during a blood pressure sensing time in the blood pressure sensing mode, the readout circuit is configured to receive the sensing signal from sensors in a blood pressure sensing area from among the plurality of sensors, and

wherein the blood pressure sensing time is longer than the fingerprint sensing time.

8. The display device of claim 1 , wherein, during the fingerprint sensing mode, the controller is configured to receive a sensing signal from sensors in a fingerprint sensing area from among the plurality of sensors, and

wherein, during the blood pressure sensing mode, the controller is configured to receive the sensing signal from sensors in a blood pressure sensing area from among the plurality of sensors.

9. The display device of claim 8 , wherein, in the fingerprint sensing mode, sizes and shapes of the emission area and the fingerprint sensing area are the same as each other.

10. The display device of claim 8 , wherein, in the blood pressure sensing mode, sizes and shapes of the emission area and the blood pressure sensing area are different from each other.

11. The display device of claim 8 , wherein, in the blood pressure sensing mode, the emission area has a circle shape having a radius, and the blood pressure sensing area has a ring shape surrounding the emission area.

12. The display device of claim 1 , wherein each of the plurality of sensors further comprises:

a first transistor connected between a reset voltage line and a first sensing node;

a second transistor connected between a sensor driving voltage line and a second sensing node, and including a gate electrode connected to the first sensing node; and

a third transistor connected between the second sensing node and a readout line, and including a gate electrode configured to receive a sensor scan signal.

13. The display device of claim 1 , wherein the display panel further comprises:

a base layer;

a circuit layer on the base layer; and

an element layer on the circuit layer, and including the light emitting element and the light sensing element.

14. A display device comprising:

a display panel including:

a plurality of pixels, each of the plurality of pixels including a light emitting element; and

a plurality of sensors, each of the plurality of sensors including a light sensing element;

a panel driving circuit configured to drive the plurality of pixels;

a readout circuit configured to receive a sensing signal from the plurality of sensors; and

a controller configured to control the panel driving circuit and the readout circuit,

wherein the controller is configured to:

control the panel driving circuit to set a luminance of pixels in an emission area from among the plurality of pixels to a luminance level in a blood pressure sensing mode; and

control the readout circuit to receive a sensing signal from sensors in a blood pressure sensing area from among the plurality of sensors, and

wherein sizes and shapes of the emission area and the blood pressure sensing area are different from each other.

15. The display device of claim 14 , wherein, in the blood pressure sensing mode, the emission area has a circle shape having a radius, and the blood pressure sensing area is a ring shape surrounding the emission area.

16. The display device of claim 14 , wherein the controller is configured to control the panel driving circuit to set the luminance of the pixels in the emission area to a first luminance level in a fingerprint sensing mode, and control the panel driving circuit to set the luminance of the pixels in the emission area to a second luminance level in a blood pressure sensing mode, and

wherein the second luminance level is higher than the first luminance level.

17. An operating method of a display device including a display panel including a plurality of pixels and a plurality of sensors, the method comprising:

determining an operating mode from among a fingerprint sensing mode and a blood pressure sensing mode;

controlling a luminance of pixels in an emission area from among the plurality of pixels to a first luminance level, when the operating mode is the fingerprint sensing mode; and

controlling the luminance of the pixels in the emission area to a second luminance level, when the operating mode is the blood pressure sensing mode,

wherein the second luminance level is higher than the first luminance level.

18. The method of claim 17 , further comprising:

authenticating a fingerprint based on a signal received from sensors in a fingerprint sensing area from among the plurality of sensors, when the operating mode is the fingerprint sensing mode; and

measuring blood pressure of a user based on a signal received from sensors in a blood pressure sensing area from among the plurality of sensors, when the operating mode is the blood pressure sensing mode.

19. The method of claim 18 , further comprising changing the luminance of the pixels in the emission area to a level higher than the second luminance level, when the blood pressure of the user cannot be sufficiently measured based on the signal received from the sensors in the blood pressure sensing area.

20. The method of claim 18 , wherein sizes and shapes of the emission area and the blood pressure sensing area are different from each other.