| 摘要 |
The present disclosure relates to a pixel driving circuit, a display apparatus and a pixel driving method. The pixel driving circuit comprises a reset unit. The reset unit is arranged to enable the storage capacitor to store not only a data voltage but also a threshold voltage of the driving unit in the charging phase, to compensate for the driving unit in the driving phase, so that the operating current of the driving unit is not influenced by the threshold voltage. This eliminates the influence of the threshold voltage of the driving unit to the operating current of the driving unit. Further, the reset unit is moved outside an active display area, and is shared by a row of pixel driving circuits, which can significantly increase the aperture rate of the pixels. |
| 主权项 |
1. A pixel driving circuit for driving a light-emitting element, comprising:
a scanning line configured to provide a scanning signal; a power line comprising a first power line and a second power line and configured to provide power to the pixel driving circuit; and a data line configured to provide a data signal; a light-emitting control signal line configured to provide a light-emitting control signal; a driving unit having an input end connected to a first end of the light-emitting element, a control end connected to a first intermediate node, and an output end connected to a second intermediate node, wherein the light-emitting element has the other end connected to the first power line; a charging unit having an input end connected to the data line, a control end connected to the scanning line, and an output end connected to the first intermediate node; a storage unit having a first end connected to the second intermediate node and a second end connected to a third intermediate node; a reset unit having an input end connected to a reference signal line, a control end connected to the scanning line, and an output end connected to the third intermediate node; and a light-emitting control unit having a first input end connected to the second power line, a second input end connected to the first intermediate node, a control end connected to the light-emitting control signal line, a first output end connected to the second intermediate node, and a second output end connected to the third intermediate node; wherein in a charging phase of the pixel driving circuit, the data line and the first intermediate node are conducted by the charging unit and the reference signal line and the third intermediate node are conducted by the reset unit under a control of the scanning signal, the driving unit provides a charging voltage related to a data voltage and a threshold voltage thereof at the output end under a control of the data signal, and the storage unit storages the charging voltage; and in a driving phase of the pixel driving circuit, the first intermediate node and the third intermediate node are conducted by the light-emitting control unit under a control of the light-emitting control signal, to conduct the second end of the storage unit and the control end of the driving unit, so that a driving current provided by the driving unit to the light-emitting element is unrelated to the threshold voltage thereof. |
