Patent ID: 11862092
Assignee: WUHAN CHINA STAR OPTOELECTRONICS SEMICONDUCTOR DISPLAY TECHNOLOGY CO., LTD.
Field: Audio-visual technology (Electrical engineering)
Classification: CPC G | IPC G

Claim 6:
7. A display device, comprising:
a pixel circuit and at least one operational amplifier;
wherein the pixel circuit comprises at least one pixel unit, and the pixel unit comprises a driving transistor, a storage capacitor, and a light-emitting device;
a gate of the driving transistor is electrically connected to a first common terminal, a drain of the driving transistor is electrically connected to a first power source, and a source of the driving transistor is electrically connected to a second common terminal;
a first terminal of the storage capacitor is electrically connected to the first common terminal, and a second terminal of the storage capacitor is electrically connected to a second power source;
an anode of the light-emitting device is configured as an input terminal of the light-emitting device and is electrically connected to the second common terminal, and a cathode of the light-emitting device is electrically connected to the second power source;
a non-inverting input terminal of the operational amplifier is electrically connected to the second common terminal, an inverting input terminal of the operational amplifier is configured to receive a data voltage and coupled to an output terminal of the operational amplifier, and the output terminal of the operational amplifier is coupled to the first common terminal;
the operational amplifier and the driving transistor constitute a negative feedback loop for controlling a voltage at the input terminal of the light-emitting device to be the same as the data voltage which is input externally; and
the operational amplifier is configured to charge the storage capacitor, so that after the storage capacitor is charged, the light-emitting device is driven by the driving transistor to emit light, wherein a charging time for the operational amplifier to charge the storage capacitor is less than a predetermined value.