Shift register and driving method thereof, light-emitting control circuit and display device

Abstract

The invention discloses a shift register and a driving method thereof, a light-emitting control circuit and a display device. The shift register comprises a coupling control module, an input module, a node control module, a first output module and a second output module, wherein through mutual cooperation of the five modules, signals can be stably output by a simple structure and less signal wires; moreover, through the mutual cooperation of the five modules, the duration of an effective pulse signal in the signals output by a signal output end can be controlled with an only need to change the duration of the effective pulse signal at an input signal end, and the alteration in a circuit and the change in a process do not need to be performed; and thus, the preparation process can be simplified, the production cost is reduced, and the shift register and the driving method thereof, the light-emitting control circuit and the display device are beneficial to implementing a narrow frame design of a panel in the display device.

Description

technical field [0001] The present invention relates to the field of display technology, and in particular, to a shift register, a driving method thereof, a lighting control circuit and a display device. Background technique [0002] An existing shift register such as figure 1 As shown, it includes: first transistor TFT1, second transistor TFT2, third transistor TFT3, fourth transistor TFT4, fifth transistor TFT5, sixth transistor TFT6, seventh transistor TFT7, eighth transistor TFT8, ninth transistor TFT9, The tenth transistor TFT10, the capacitor C01, the capacitor C02 and the capacitor C03. The corresponding timing diagram is as follows figure 2 As shown, in the shift stage t1, since the clock signal CK is at a low level, both the first transistor TFT1 and the second transistor TFT2 are turned on. The turned-on first transistor TFT1 makes the potential of the node M1 a high potential, and the seventh transistor TFT7, the eighth transistor TFT8 and the ninth transistor...

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Problems solved by technology

[0003] However, in the input phase of the above-mentioned shift register, the potentials at both ends of the capacitor C01 are high potentials, and in the output phase, the clock signal CKB changes from a high potential to a low potential. Due to the coupling effect of the capacitor C01, the potential of the node M1 will be Coupled to a low potential, causing the seventh transistor TFT7, the eighth transistor TFT8 and the ninth transistor TFT9 to be turned on

Wherein, since the ninth transistor TFT9 is turned on, the fifth transistor TFT5 is turned off, so that the low-potential clock signal CKB cannot be written into the node M4; because the seventh transistor TFT7 is turned on, the potential of the node M4 is high, resulting in the second The tenth transistor TFT10 is turned off; and because the eighth transistor TFT8 is turned on, the output signal terminal Output outputs a low potential signal, which causes the shift register to fail to shift and output normally

[0004] Moreover, the number of transistors included in the above-mentioned shift register is relatively large, and the specific structure of the connection between the transistors is relatively complicated, resulting in increased process difficulty, increased production costs, and reduced aperture ratio of the display panel, making the display Panels are not competitive

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