公开(公告)号：US20220392402A1

公开(公告)日：2022-12-08

申请号：US17770402

申请日：2019-10-31

Applicant: Sharp Kabushiki Kaisha

Inventor： Naoki UEDA ,  Ryohei MORITA

IPC: G09G3/325 ,  G09G3/3291

Abstract: The present application discloses a current-driven display device of an internal compensation type in which threshold compensation of a drive transistor is appropriately performed without causing a decrease in display quality or a decrease in yield during manufacturing, and display luminance is improved while a drive voltage is maintained. A pixel circuit 15 in the display device includes first and second drive transistors M1a, M1b, and the gate terminals thereof are connected to each other and connected to a holding capacitor Cs. During the data write period, a voltage of a corresponding data signal line Dj is written to the holding capacitor Cs via the first drive transistor M1a, having been set in a diode connection mode by a threshold compensation transistor M3, to perform data writing accompanied by threshold compensation. During the emission period, a current corresponding to the sum of currents I1, I2 flowing through the first and second drive transistors M1a, M1b in accordance with the holding voltage of the holding capacitor Cs is supplied to an organic EL element OL as a drive current Id.