Shifting register and array substrate grid drive device

Abstract

The invention provides a shifting register and an array substrate grid drive device. The shifting register is of a structure for multi-stage connection of the same shifting register units, wherein each shifting register unit comprises an input module responding to an input signal, an output module responding to an upward pull node, a reset module responding to a reset signal, a first upward pull module responding to a first clock signal, a second upward pull module responding to a downward pull node voltage signal, a first downward pull module responding to a first upward pull node voltage signal, a second downward pull module responding to an upward pull node voltage signal, a control module responding to a second clock signal and a retaining module responding to the first clock signal and a second downward pull node. The working loss of the shifting register can be reduced, attenuation of a second downward pull voltage signal is reduced, and accordingly the stability of the shifting register in working is improved.

Description

technical field [0001] The invention relates to the technical field of liquid crystal display driving, in particular to a shift register and an array substrate gate driving device. Background technique [0002] Shift registers are used in most flat panel displays, and are implemented by integrating gate drive devices into liquid crystal panels. In recent years, the shift register (Gate on Array, GOA) technology has been widely used in liquid crystal display panels, so people have higher and higher requirements on the service life of the GOA, the work consumption of the GOA, and the stability of the GOA work. [0003] In the prior art, a shift register is composed of a circuit structure of each GOA unit in multiple shift registers. figure 1 As shown, however, when CLKB is high, the gate of M5 is high, M5 is turned on, the PDCN node is high, the gate and drain of M6 are both high, M6 is turned on, and the node PD The point will be in the charging process and become high leve...

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Problems solved by technology

[0003] In the prior art, a shift register is composed of a circuit structure of each GOA unit in multiple shift registers. figure 1 As shown, however, when CLKB is high, the gate of M5 is high, M5 is turned on, the PDCN node is high, the gate and drain of M6 are both high, M6 is turned on, and the node PD The point will be in the charging process and become high level; when CLKB is low level, because of the delay effect of M5, the gate of M6 is still high level, but the source of M6 is extremely low level, so that the node PD point and CLKB is directly connected, and at this time CLKB is low level, so the PD point will be in the discharge process and become low level

The periodic charging and discharging process increases the working loss of the shift register. At the same time, after passing through several GOA units, the waveform delay of CLKB is more serious, and the voltage signal of the PD point is seriously attenuated, thus affecting the quality of the display screen.

[0004] To sum up, the shift register provided by the prior art increases the operating loss of the shift register, seriously attenuates the voltage signal at the PD point, and reduces the stability of its operation.

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