Signal combining circuit, gate driving unit, gate driving circuit and display device

Abstract

The invention discloses a signal combining circuit, a gate driving unit, a gate driving circuit and a display device. The signal combining circuit includes a first active level output circuit, a firstinactive level output circuit and a node voltage control circuit, wherein the first active level output circuit is used for writing an active level voltage to a driving signal output end when a signal supplied by a first signal output end or a second signal output end is in an active level state, and the first inactive level output circuit is used for writing an inactive level voltage to the driving signal output end when signals supplied by the first signal output end and the second signal output end are both in an inactive level state. The technical scheme of the invention can realize the combination of monopulse signals output by two shifting registers, thereby outputting a double-pulse driving signal to meet a requirement of sensing the driving of a transistor; and in addition, the technical scheme is based on a GOA circuit, which is beneficial to the narrow-frame design of an OLED display panel.

Description

technical field [0001] The present invention relates to the field of display technology, in particular to a signal combination circuit, a gate drive unit, a gate drive circuit and a display device. Background technique [0002] In the process of driving the OLED in the organic light-emitting diode (Organic Light-Emitting Diode, referred to as OLED) display panel, due to the performance difference of each driving transistor or OLED (difference caused by process, difference caused by aging), it will cause The display brightness is not uniform, so the performance of the drive transistor or OLED needs to be compensated. [0003] Among them, external compensation is a common compensation method. Specifically, external compensation refers to extracting the current at the drive transistor or OLED through the sensing circuit, and after reading out the electrical signal, implements a more complex algorithm with the help of an external integrated circuit chip to compensate for the no...

AI Technical Summary

Problems solved by technology

Among them, if the gate drive unit is implemented by using a gate drive chip, although it can output double pulse signals, it is not conducive to the realization of a narrow frame due to the large size of the gate drive chip; if the gate drive unit uses a gate The driver circuit (Gate Driver on Array, referred to as GOA), although it can achieve a narrow frame design, but because each shift register can only output a single pulse signal within one frame time, it is not suitable for external compensation

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