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Gate drive circuit and display device

A gate drive circuit and gate drive technology, applied in static indicators, instruments, etc., can solve the problems of large variation in TFT characteristics, poor circuit stability, and drop in on-state current, so as to reduce the occupation of layout area, High stability and reduced threshold voltage drift effect

Active Publication Date: 2017-11-07
KUSN INFOVISION OPTOELECTRONICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, in the traditional a-Si:H TFT-LCD panel, due to the low mobility of a-Si, and the variation of TFT characteristics with the manufacturing process is large, and due to the threshold voltage drift characteristics of amorphous silicon, the pull-down is stable. After the transistor is biased for a long time, its characteristics will degrade, and the on-state current will decrease, resulting in poor circuit stability, which will eventually lead to circuit failure.

Method used

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  • Gate drive circuit and display device

Examples

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Effect test

no. 1 example

[0030] figure 1 is a circuit diagram of the gate drive unit circuit provided by the first embodiment of the present invention. see figure 1 , the gate driving unit circuit 5 includes: a pre-charging module 10 , a transfer signal generating module 20 , a stabilizing module 30 , and an output module 40 . Wherein, the pre-charging module 10 is electrically connected with the transfer signal generating module 20 , the stabilizing module 30 , and the output module 40 .

[0031] In the embodiments of the present invention, it is assumed that the current gate driving unit circuit is the nth-level gate driving unit circuit, and G[n] and Z[n] respectively represent the gate scanning signals output by the n-level gate driving unit circuit and transmission signal, G[n+1], Z[n+1] respectively represent the gate scanning signal and the transmission The signals, G[n-1] and Z[n-1] respectively represent the gate scanning signal and the transfer signal output by the gate driving unit circu...

no. 2 example

[0067] Figure 7 is a circuit diagram of the gate drive unit circuit provided by the second embodiment of the present invention. This embodiment and figure 1 The difference is that: the gate driving unit circuit of the first stage in the plurality of gate driving unit circuits may further include: transistors T15 (fifteenth transistor), T16 (sixteenth transistor) and T17 (tenth transistor seven transistors), and the first signal receiving end 111 and the second signal receiving end 112 are connected to the start signal output end STV to receive the start signal.

[0068] Wherein, the gate of the transistor T15 receives the first control signal LC1, the first terminal of the transistor T15 is electrically connected to the fourth node PB0 of the first stage gate driving unit circuit, and the second terminal of the transistor T15 receives the first control signal LC1 . The gate of the transistor T16 is electrically connected to the fourth node PB0 of the first-stage gate drive...

no. 3 example

[0071] According to the above embodiments, the third embodiment of the present invention also discloses a display device, including: a panel, the panel includes a two-dimensional pixel array composed of a plurality of pixels, and a plurality of pixels in the first direction connected to each pixel array A data line and a plurality of gate scanning lines in the second direction; a data driving circuit for providing image signals to the data lines; and a gate driving circuit in Embodiments 1 and 2 for scanning the gate line provides the gate scan signal. The pixel array is formed on a transparent substrate, and includes a plurality of gate lines, data lines and a plurality of switching transistors. Switch transistors are respectively coupled to each gate line and each data line. The data driving circuit is coupled to the data lines and provides data signals to the data lines. The gate drive circuit is coupled to the gate line and drives the switch transistor.

[0072] In summ...

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Abstract

The embodiment of the invention discloses a GIA (Gate-driver In Array) circuit and a display device, belonging to the display driving technical field. The GIA circuit comprises a pre-charge module, a transmission signal generation module, a stabilizing module and an output module. When the transmission signal outputted by an (n-3)th level of GIA unit circuit becomes a high level form a low level, and the grid scanning signal outputted by the (n-3)th level of GIA unit circuit also becomes a high level form a low level, the pre-charge module charges a control node through an output terminal; when a clock signal becomes a high level form a low level, the transmission signal generation module performs charge pump on the control node, rising the potential of the control node; when the control node is pulled down to a low level, the stabilizing module pulls down and stabilizes the control node and the output terminal; when the control node is a high level, the low level of the clock signal is applied to a grid scanning signal output terminal. According to the invention, the circuit output capability and stability are improved.

Description

technical field [0001] The invention relates to the technical field of display driving, in particular to a gate driving circuit and a display device. Background technique [0002] In recent years, narrow bezel display technology has developed rapidly, and has gradually become a mainstream flat panel display technology. Especially for small and medium-sized thin film transistor (Thin Film Transistor; TFT) display screens such as smartphones and tablets, the narrow bezel display technology is more widely used. The core of the narrow bezel display technology is the TFT integrated gate driver (Gate-driver In Array, GIA for short) circuit design. After using the GIA circuit, not only can the frame size of the display screen be significantly reduced, making the entire display screen more compact and beautiful, but also the number of row and column driver chips on the display screen and the corresponding number of connecting wires can be reduced. In addition, the subsequent packa...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G09G3/20G09G3/36
Inventor 于子阳房耸
Owner KUSN INFOVISION OPTOELECTRONICS
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