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US 2019/0096322 A1Published application
Pixel driving circuit and method thereof, and display device
AssigneeBoe Technology Group Co., Ltd.
InventorXueling GAO
Life of this patent
Estimating the term…
Abstract
The present disclosure provides a pixel driving circuit, a pixel driving method, and a display device. The pixel driving circuit includes: a first switch element, a second switch element, a third switch element, a fourth switch element, a fifth switch element, a sixth switch element, a driving transistor and a storage capacitor.
Claims17
A pixel driving circuit, which is configured to drive an electroluminescent element, the pixel driving circuit comprising:
- a first switch element, connected to a first node and configured to be turned on to transmit a reset signal to the first node in response to a first scanning signal;
- a second switch element, connected to a second node, and configured to be turned on in response to the first scanning signal, so as to transmit the reset signal to the second node;
- a third switch element, connected to a fourth node, and configured to be turned on in response to a second scanning signal, so as to transmit a data signal to the fourth node;
- a fourth switch element, connected to the fourth node, and configured to be turned on in response to a control signal, so as to transmit a first power signal to the fourth node;
- a fifth switch element, connected to the second node and a third node and configured to be turned on to electrically interconnect the third node to the second node in response to the control signal, wherein the second node is coupled with the electroluminescent element;
- a sixth switch element, connected to the first node and the third node, and configured to be turned on in response to the second scanning signal, so as to interconnect the first node to the third node;
- a driving transistor, connected to the third node and the fourth node, and configured to be turned on in response to a voltage signal of the first node, so as to transmit a signal of the fourth node to the third node;
- and
- a storage capacitor, wherein a first end of the storage capacitor is coupled with the first node, and a second end of the storage capacitor receives the first power signal.
6 more elements
A pixel driving method for driving a pixel driving circuit configured to drive a electroluminescent element, the pixel driving circuit comprises:
- a first switch element, connected to a first node, and configured to be turned on in response to a first scanning signal, so as to transmit a reset signal to the first node;
- a second switch element, connected to a second node, and configured to be turned on in response to the first scanning signal, so as to transmit the reset signal to the second node;
- a third switch element, connected to a fourth node, and configured to be turned on in response to a second scanning signal, so as to transmit a data signal to the fourth node;
- a fourth switch element, connected to the fourth node, and configured to be turned on in response to a control signal, so as to transmit a first power signal to the fourth node;
- a fifth switch element, connected to the second node and a third node, and configured to be turned on in response to the control signal, so as to interconnect the third node to the second node, and wherein the second node is coupled with the electroluminescent element;
- a sixth switch element, connected to the first node and the third node, and configured to be turned on in response to the second scanning signal, so as to interconnect the first node to the third node;
- a driving transistor, connected to the third node and the fourth node, and configured to be turned on in response to a voltage signal of the first node, so as to transmit a signal of the fourth node to the third node;
- and a storage capacitor, wherein a first end of the storage capacitor is coupled with the first node, and a second end of the storage capacitor receives the first power signal;
- the method comprising:
- in a reset stage, the first switch element, the second switch element, the fourth switch element and the fifth switch element are turned on through the first scanning signal and the control signal;
- the reset signal is transmit to the first node through the first switch element, and the driving transistor is turned on through the voltage signal of the first node;
- the reset signal is transmit to the second node through the second switch element and the reset signal is transmit to the third node through the fifth switch element;
- the first power signal is transmit to the fourth node through the fourth switch element;
- in a data writing and threshold compensation stage, the third switch element and the sixth switch element are turned on through the second scanning signal, so as to write the data signal and a threshold voltage of the driving transistor to the first node;
- and
- in a driving stage, the fourth switch element and the fifth switch element are turned on through the control signal, so as to turn on the driving transistor under the control of the voltage of the first node and output a driving current under the action of the first power signal, and the driving current flows through the fifth switch element to drive the electroluminescent element to emit light.
13 more elements
A display device, comprising a pixel driving circuit configured to drive an electroluminescent element, the pixel driving circuit comprising:
- a first switch element, connected to a first node, and configured to be turned on in response to a first scanning signal, so as to transmit a reset signal to the first node;
- a second switch element, connected to a second node, and configured to be turned on in response to the first scanning signal, so as to transmit the reset signal to the second node;
- a third switch element, connected to a fourth node, and configured to be turned on in response to a second scanning signal, so as to transmit a data signal to the fourth node;
- a fourth switch element, connected to the fourth node, and configured to be turned on in response to a control signal, so as to transmit a first power signal to the fourth node;
- a fifth switch element, connected to the second node and a third node, and configured to be turned on in response to the control signal, so as to interconnect the third node to the second node, and the second node is coupled with the electroluminescent element;
- a sixth switch element, connected to the first node and the third node, and configured to be turned on in response to the second scanning signal, so as to interconnect the first node to the third node;
- a driving transistor, connected to the third node and the fourth node, and configured to be turned on in response to a voltage signal of the first node, so as to transmit a signal of the fourth node to the third node;
- and
- a storage capacitor, a first end of the storage capacitor is coupled with the first node, and a second end of the storage capacitor receives the first power signal.
6 more elements
Dependencies are inferred from the claim text.