Display substrate and display device

Abstract

The invention discloses a display substrate and a display device. The display substrate comprises a substrate; a plurality of pixel circuits on the substrate, wherein each pixel circuit comprises a drive module and an organic light-emitting structure, and the drive module comprises n series drive transistors. The grid electrodes of the n series drive transistors are electrically connected, and the drive modules are used for providing drive currents for the organic light-emitting structures through the n series drive transistors. The organic light-emitting structures are used for responding to the drive currents to emit light. The display substrate also comprises a data writing-in module which is used for writing a data signal into the grid electrodes of the n series drive transistors; and a storage module which is electrically connected with the grid electrodes of the n series drive transistors, and is used for maintaining the grid voltage of the n series drive transistors at a light-emitting stage, wherein n is an integer greater than one. According to the technical scheme of the invention, the display substrate reduces the amplitude of a voltage across the source and drain electrodes of each transistor, and solves a problem of display non-uniformity of a display device.

Description

technical field [0001] Embodiments of the present invention relate to the field of display technology, and in particular, to a display substrate and a display device. Background technique [0002] An organic light emitting display device generally includes several pixels, and each pixel includes a pixel circuit. The pixel circuit with the simplest structure used in the prior art is a 2T1C structure, that is, the pixel circuit includes two transistors and a storage capacitor, one of which is a switching transistor, and the other transistor is a drive transistor that drives the organic light-emitting structure in the pixel to emit light , but the driving current generated by the driving transistor to drive the organic light-emitting structure to emit light is related to the threshold voltage of the driving transistor. When the threshold voltage of the driving transistor drifts for a long time, it will affect the magnitude of the driving current generated by the driving transis...

AI Technical Summary

Problems solved by technology

[0004] In view of this, the present invention provides a display substrate and a display device. By setting the driving module in the pixel circuit to include multiple series-connected driving transistors, the driving module can provide driving current to the organic light-emitting structure through the multiple series-connected driving transistors. While not affecting the operation of the driving module in the pixel circuit, the number of driving transistors in the driving module is increased, and compared with the prior art, the voltage between the source and drain of each driving transistor is reduced, and the driving performance is improved. The coincidence degree of the distorted portion of the transfer characteristic curve after transistor compensation and the original transfer characteristic curve improves the problem of uneven display in the display device

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