Pixel circuit, array substrate, display panel, display device and display driving method
A pixel circuit, an array substrate, a display panel, a display device, and a display driving method are provided. The pixel circuit includes a light emitting element, a pixel driving circuit, and an optical modulation circuit; in a touch stage, turning off the pixel driving circuit, driving the light emitting element to emit a modulated light of a first gray scale by the optical modulation circuit; and in a display stage, turning off the optical modulation circuit, and driving the light emitting element to emit light for display by the pixel driving circuit.
1. A pixel circuit, comprising a light emitting element, a pixel driving circuit, and an optical modulation circuit,
wherein a first terminal and a second terminal of the light emitting element are respectively configured to be connected to a first node and a second level signal terminal;
a control terminal, a first terminal and a second terminal of the optical modulation circuit are respectively configured to be connected to a touch sensing signal terminal, a touch scanning signal terminal and the first node, and the optical modulation circuit is configured to drive the light emitting element to emit modulated light in term of a modulation signal provided by the touch scanning signal terminal under control of a touch sensing signal of the touch sensing signal terminal; and
a first terminal and a second terminal of the pixel driving circuit are respectively configured to be connected to a first level signal terminal and the first node, and the pixel driving circuit is configured to drive the light emitting element to emit light for display.
2. The pixel circuit according to claim 1 , wherein the optical modulation circuit comprises a first switch transistor;
as the control terminal, the first terminal and the second terminal of the optical modulation circuit, a gate electrode of the first switch transistor is connected to the touch sensing signal terminal, a first electrode of the first switch transistor is connected to the touch scanning signal terminal, and a second electrode of the first switch transistor is connected to the first node.
3. The pixel circuit according to claim 1 , wherein a first level signal output from the first level signal terminal is higher than a second level signal output from the second level signal terminal.
4. The pixel circuit according to claim 1 , wherein the light emitting element is an organic light emitting diode.
5. An array substrate, comprising a plurality of pixel units, wherein the pixel units each comprise the pixel circuit according to claim 1 .
6. The array substrate according to claim 5 , further comprising a plurality of optical sensitive sensors,
wherein the optical sensitive sensors are configured to detect the modulated light emitted from the light emitting element of the pixel circuit.
7. The array substrate according to claim 6 , wherein the pixel unit is provided in a same layer as the optical sensitive sensors.
8. The array substrate according to claim 6 , further comprising a plurality of touch signal reading lines,
wherein a touch display area of the array substrate is divided into a plurality of sub-areas, and each of the sub-areas comprises at least one of the optical sensitive sensors respectively, and an output terminal of the at least one of the optical sensitive sensors in each of the sub-areas is connected to a same touch signal reading line.
9. The array substrate according to claim 6 , wherein input terminals of the optical sensitive sensors are all connected to a same level signal terminal.
10. The array substrate according to claim 6 , further comprising an ambient light detection sensor,
wherein the ambient light detection sensor is configured to detect ambient light and output a detection result.
11. The array substrate according to claim 5 , further comprising the touch sensing signal terminal and the touch scanning signal terminal,
wherein the touch sensing signal terminal is configured to provide the touch sensing signal, and the touch scanning signal terminal is configured to provide the modulation signal.
12. A display panel comprising an array substrate and a package substrate disposed opposite to each other,
wherein the array substrate is the array substrate according to claim 5 .
13. A display device comprising the display panel according to claim 12 .
14. The display device according to claim 13 , further comprising a controller, wherein the controller is configured to provide the touch sensing signal and the modulation signal.
15. A touch display method of the display panel according to claim 12 , comprising:
in a touch stage, turning off the pixel driving circuit, driving the light emitting element to emit the modulated light of a first gray scale by the optical modulation circuit; and
in a display stage, turning off the optical modulation circuit, and driving the light emitting element to emit light for display by the pixel driving circuit.
16. The touch display method according to claim 15 , further comprising:
detecting an intensity of the ambient light, and
adjusting the first gray scale of the modulated light emitted by the light emitting element to a second gray scale different from the first gray scale according to a detection result of the intensity of the ambient light.