Patent ID: 8743027

Claim:
An OLED (organic light emitting diode) driving circuit to drive an OLED, wherein the OLED driving circuit comprises: a switch transistor comprising; a first source/drain terminal to receive a data signal; a second source/drain terminal; and a gate terminal to receive a scan signal; a storage capacitor comprising a first end and a second end; a driving transistor comprising a first source/drain terminal, a gate terminal and a second source/drain terminal connected to the OLED; and a control module comprising: a charging switch connected between the first end of the storage capacitor and a first voltage end; a memory switch connected between the first end of the storage capacitor and the second source/drain terminal of the driving transistor; and three light-emitting switches respectively connected between the first end of the storage capacitor and the gate terminal of the driving transistor, between the first voltage end and the first source/drain terminal of the driving transistor and between the second end of the storage capacitor and the second source/drain terminal of the driving transistor; wherein in a charging time period, the charging switch is controlled to be conducted and the three light-emitting switches and the memory switch are controlled to be un-conducted such that the scan signal turns on the switch transistor to transmit the data signal from the first source/drain terminal of the switch transistor to the second source/drain terminal of the switch transistor; in a memory time period after the charging time period, the memory switch is controlled to be conducted and the three light-emitting switches and the charging switch are controlled to be un-conducted such that the scan signal turns on the switch transistor to transmit the data signal from the first source/drain terminal of the switch transistor to the second source/drain terminal of the switch transistor; and in a light-emitting time period after the memory time period, the three light-emitting switches are controlled to be conducted and the memory switch and the charging switch is controlled to be un-conducted such that the scan signal turns off the switch transistor.