| CPC G09G 3/3233 (2013.01) [G09G 2300/0426 (2013.01); G09G 2300/0465 (2013.01); G09G 2300/0819 (2013.01); G09G 2300/0842 (2013.01); G09G 2300/0861 (2013.01); G09G 2310/08 (2013.01); G09G 2320/0233 (2013.01)] | 20 Claims |
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1. A pixel driving circuit, comprising a driving transistor, a capacitor and a light emitting device, wherein both terminals of the capacitor are connected to a first power terminal and a gate electrode of the driving transistor, respectively, wherein the pixel driving circuit further comprises:
a reset module configured to transmit a signal at an initialization voltage terminal to the gate electrode of the driving transistor and a first terminal of the light emitting device in a reset phase, to initialize potentials at the gate electrode of the driving transistor and the first terminal of the light emitting device;
a data writing module configured to write a data signal at a data writing terminal into a first electrode of the driving transistor in a data writing phase;
a threshold compensation module comprising a compensation transistor, which is configured to electrically connect a second electrode and the gate electrode of the driving transistor together in the data writing phase; and
a light emitting control module comprising a first gating transistor and configured to disconnect the first power terminal from the first electrode of the driving transistor in the reset phase and the data writing phase; wherein the first gating transistor is configured to electrically connect the second electrode of the driving transistor and the light emitting device in the reset phase and disconnect the second electrode of the driving transistor from the light emitting device in the data writing phase; the light emitting control module is configured to electrically connect the first power terminal and the first electrode of the driving transistor and electrically connect the second electrode of the driving transistor and the light emitting device in a light emitting phase; and
wherein the compensation transistor is an oxide transistor, the driving transistor is a low-temperature polysilicon transistor, and the first gating transistor is an oxide transistor;
wherein a first electrode of the first gating transistor is connected to the second electrode of the driving transistor, and a second electrode of the first gating transistor is connected to the first terminal of the light emitting device;
the data writing module comprises a writing transistor; and
a gate electrode of the first gating transistor and a gate electrode of the writing transistor are connected to a scan signal terminal, a first electrode of the writing transistor is connected to the data writing terminal, and a second electrode of the writing transistor is connected to the first electrode of the driving transistor.
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