| CPC G09G 3/3258 (2013.01) [G09G 3/3233 (2013.01); G09G 2300/0426 (2013.01); G09G 2300/0819 (2013.01); G09G 2300/0842 (2013.01); G09G 2320/0233 (2013.01); G09G 2320/0247 (2013.01)] | 18 Claims |
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1. A pixel circuit, comprising:
a light emitting module configured to emit light;
a driving module configured to drive the light emitting module to emit light according to a driving voltage during a light emitting stage;
a storage module configured to maintain the driving voltage and to provide the driving voltage to the driving module during the light emitting stage;
a first transistor, a first electrode of the first transistor being connected to the driving module, and a second electrode of the first transistor being not directly connected to a signal source;
a second transistor, a first electrode of the second transistor being connected to the first electrode of the first transistor, wherein a structure to which a second electrode of the second transistor is connected is different from a structure to which the second electrode of the first transistor is connected; and
a voltage stabilizing capacitor, a first electrode of the voltage stabilizing capacitor being connected to the second electrode of the first transistor, and a second electrode of the voltage stabilizing capacitor being connected to a constant voltage signal terminal;
the pixel circuit further comprises:
a third transistor, a first electrode of the third transistor being connected to the second electrode of the first transistor, and a gate of the third transistor being connected to a gate of the first transistor;
a fourth transistor, a first electrode of the fourth transistor being connected to the second electrode of the second transistor, and a gate of the fourth transistor being connected to a gate of the second transistor;
wherein the light emitting module comprises a light emitting device;
the driving module comprises a driving transistor configured to drive the light emitting device to emit light according to a voltage at a gate of the driving transistor; and
the storage module comprises a storage capacitor, which has a first electrode connected to the gate of the driving transistor and is configured to maintain the driving voltage at the first electrode thereof and provide the driving voltage to the driving module during the light emitting stage; and
the pixel circuit comprises a first reset module, a write module and a luminous control module;
the first reset module is configured to reset the voltage at the gate of the driving transistor according to signals at an initialization signal terminal and a first reset signal terminal; the first reset module comprises:
the first transistor;
the third transistor, the first electrode of the third transistor being connected to the second electrode of the first transistor, a second electrode of the third transistor being connected to the initialization signal terminal and the gate of the third transistor being connected to the gate of the first transistor and the first reset signal terminal;
the write module is configured to write the driving voltage to the first electrode of the storage capacitor according to signals at a gate signal terminal and a data signal terminal; the write module comprises:
the second transistor;
the fourth transistor, the first electrode of the fourth transistor being connected to the second electrode of the second transistor, a second electrode of the fourth transistor being connected to the second electrode of the driving transistor and the gate of the fourth transistor being connected to the gate of the second transistor and the gate signal terminal;
a fifth transistor, a first electrode of the fifth transistor being connected to the first electrode of the driving transistor, a second electrode of the fifth transistor being connected to the data signal terminal, and a gate of the fifth transistor being connected to the gate signal terminal;
the luminous control module comprises:
a sixth transistor, a first electrode of the sixth transistor being connected to a first power signal terminal, a second electrode of the sixth transistor being connected to the first electrode of the driving transistor, and a gate of the sixth transistor being connected to a control signal terminal:
wherein,
the driving transistor and the light emitting device are connected in series between the first power signal terminal and a second power signal terminal;
a second electrode of the storage capacitor is connected to the first power signal terminal;
a second electrode of the light emitting device is connected to the second power signal terminal; and
the write module further comprises a coupling capacitor, a first electrode of the coupling capacitor is connected to the first electrode of the fourth transistor, and a second electrode of the coupling capacitor is connected to the first power signal terminal.
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