Pixel circuit, driving method of pixel circuit, and display device adopting pixel circuit

Abstract

The invention provides a pixel circuit, a driving method of the pixel circuit, and a display device adopting the pixel circuit. The pixel circuit comprises a plurality of pixel unit rows; each pixel unit row comprises a plurality of sub-pixel units and further comprises a row shared unit; each sub-pixel unit comprises a light-emitting element; the row shared unit comprises a plurality of row driving light-emitting control modules; all the sub-pixel units in each pixel unit row are connected with a signal wire and a scanning line; a light-emitting control signal is accessed into each row driving light-emitting control module; the row driving light-emitting control module is connected with all the sub-pixel units of one pixel unit row through the signal wire, so as to write voltage data under the control of a scanning signal output by the scanning line, have a threshold compensation function, and then drive the light-emitting element to emit light under the control of the light-emitting control signal. The pixel circuit, the driving method and the display device have the advantages that the pixel aperture ratio is improved; the display is uniform; the current density of an organic emitting layer is reduced.

Description

technical field [0001] The present invention relates to the field of display technology, in particular to a pixel circuit, a driving method for the pixel circuit and a display device. Background technique [0002] Due to the AMOLED (Active Matrix / Organic Light Emitting Diode, Active Matrix Organic Light Emitting Diode) pixel drive circuit based on LTPS (Low Temperature Poly-silicon, low temperature polysilicon technology), due to LTPS has problems such as poor threshold voltage uniformity, so in AMOLED In pixel design, it is necessary to add a circuit for driving TFT (Thin Film Transistor, Thin Film Field Effect Transistor) threshold voltage compensation. [0003] Such as Figure 1A As shown, a common design of an AMOLED pixel driver circuit with threshold voltage compensation requires a 6T1C pixel driver circuit, or requires more TFTs and / or capacitors. Such as Figure 1A As shown, the 6T1C pixel drive circuit includes a first control transistor T1, a second control transi...

AI Technical Summary

Problems solved by technology

[0005] In the prior art, the increase in the number of TFTs and / or capacitors for threshold compensation will require more control signals and occupy a larger layout space, which is not conducive to the reduction of AMOLED pixel size, which limits the high PPI ( Pixel Per Inch, the number of pixels per inch) AMOLED pixel drive circuit development

Images