Patent ID: 11967281
Assignee: HKC CORPORATION LIMITED
Field: Audio-visual technology (Electrical engineering)
Classification: CPC G | IPC G

Claim 0:
1. A driving circuit, comprising:
a voltage initialization module;
a voltage compensation module connected to the voltage initialization module; and
a light-emitting diode connected to the voltage initialization module; wherein
the voltage compensation module is configured to compensate a threshold voltage of the driving circuit to obtain a driving voltage, and make the driving circuit connect to a driving current based on the driving voltage;
the voltage initialization module is configured to eliminate residual charges, to make the driving circuit drive the light-emitting diode through the driving current;
the voltage compensation module comprises a first thin film transistor, a second thin film transistor, a third thin film transistor, a fourth thin film transistor, a fifth thin film transistor and a capacitor;
an output terminal of the first thin film transistor is connected to an input terminal of the second thin film transistor;
an output terminal of the second thin film transistor is connected to a positive electrode of the capacitor, an output terminal of the third thin film transistor is connected to a negative electrode of the capacitor, an output terminal of the fourth thin film transistor is connected to the negative electrode of the capacitor, and a control terminal of the fifth thin film transistor is connected to the positive electrode of the capacitor;
the first thin film transistor and the second thin film transistor are connected in series to the positive electrode of the capacitor, and an output terminal of the fifth thin film transistor is connected to a connection point where the first thin film transistor is connected to the second thin film transistor, and an input terminal of the fifth thin film transistor is connected to the driving current of the driving circuit;
the third thin film transistor and the fourth thin film transistor are connected in parallel to the negative electrode of the capacitor;
the voltage initialization module comprises a sixth thin film transistor;
an input terminal of the sixth thin film transistor is connected to the connection point where the first thin film transistor is connected to the second thin film transistor, a control terminal of the sixth thin film transistor is connected to an emission signal of the driving circuit, and an output terminal of the sixth thin film transistor is connected to the light-emitting diode;
in response to that a control terminal of the first thin film transistor is turned on by a high level, control terminals of the second thin film transistor, the third thin film transistor and the fourth thin film transistor are turned off by a low level, respectively;
in response to that the control terminals of the first thin film transistor, the second thin film transistor and the fourth thin film transistor are turned on by the high level, respectively, the control terminal of the third thin film transistor is turned off by the low level;
in response to that the control terminals of the first thin film transistor and the third thin film transistor are turned on by the high level, respectively, the control terminals of the second thin film transistor and the fourth thin film transistor are turned off by the low level, respectively; and
in response to that the control terminal of the fifth thin film transistor is turned on by the driving voltage, and the control terminal of the six thin film transistor is turned on by the high level, the control terminals of the first thin film transistor, the second thin film transistor, the third thin film transistor and the fourth thin film transistor are turned off by the low level, respectively.