Pixel circuit and driving method thereof as well as display apparatus

• Main Authors: WANG CUICUI, WANG LONGYAN, ZHANG SHENGDONG, LENG CHUANLI
• Format: Patent
• Language: English
• Published: 25.11.2015
• Subjects: ADVERTISING; ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICESUSING STATIC MEANS TO PRESENT VARIABLE INFORMATION; CRYPTOGRAPHY; DISPLAY; EDUCATION; PHYSICS; SEALS

The application discloses a pixel circuit including a first capacitor, a second capacitor, a second transistor, a third transistor and a luminous branch circuit coupled between a first common electrode and a second common electrode. The luminous branch circuit includes a first transistor, a fourth transistor and a luminous element which are connected in series. A first electrode of the first transistor is coupled to a second electrode of the fourth transistor, and a coupling node is a third node. A control electrode of the fourth transistor is used for inputting a second scan control signal. The fourth transistor switches the on-off states of the branch circuit in response to the second scan control signal. During a programming stage, a threshold-voltage of the first transistor is input to a first node by the third transistor and is stored. During a luminous stage, a driving current is generated according to a voltage difference at both ends of the first capacitor and drives the luminous element to shine. The pixel circuit can compensate a threshold-voltage offset of the first transistor and luminous devices. The application also discloses a driving method based on the pixel circuit and a display apparatus.