A pixel circuit, its driving method, and a display panel

Abstract

The invention discloses a pixel circuit, a driving method thereof and a display panel. The pixel circuit comprises a first data writing unit, a second data writing unit, a first light emitting unit, asecond light emitting unit, a sharing capacitor, a first compensation subunit and a second compensation subunit. The first data writing unit is externally connected with a first data signal and is electrically connected with the first light emitting unit through a first node. The second data writing unit is externally connected with a second data signal and is electrically connected with the second light emitting unit through a second node. The first compensation subunit is located between the first light-emitting unit and the shared capacitor, and the first compensation subunit is externallyconnected with a switching signal and a first control signal. The second compensation subunit is located between the second light-emitting unit and the shared capacitor, and the second compensation subunit is externally connected with a switching signal and a second control signal. The first compensation subunit and the second compensation subunit can achieve threshold compensation of the two light-emitting units through one shared capacitor, a smaller layout space is occupied, and therefore the PPI of the display panel is improved.

Description

technical field [0001] The invention relates to the technical field of electronic displays, in particular to a pixel circuit, a driving method thereof, and a display panel. Background technique [0002] In an existing pixel circuit, generally a light emitting diode in the pixel circuit is driven to emit light through a thin film transistor, and this thin film transistor is called a driving transistor. The driving transistor works in a saturated state, because in the saturated state, the sensitivity of the driving current output by the driving transistor to the source-drain voltage is lower than that of the driving transistor in the linear state, which can provide a more stable driving current for the light emitting diode. figure 1 It is a schematic diagram of the existing most basic pixel circuit structure, such as figure 1 As shown, the pixel circuit is composed of two transistors T11 and T12, and a capacitor C11. When the Sn signal controls the transistor T12 to be turne...

AI Technical Summary

Problems solved by technology

Generally speaking, a threshold compensation circuit at least includes a driving unit, a data writing unit, and a threshold compensation unit. Since the threshold compensation unit is added to the threshold compensation circuit, the layout space occupied by a single circuit increases, which is not conducive to improving the display panel. Pixels (Pixels Per Inch, PPI)

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