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Bidirectional grid scanning driving circuit

A gate drive circuit and bi-directional scanning technology, which is applied to instruments, static indicators, etc., can solve the problems of large circuit power consumption, large layout space, and large number of components, and achieve the effect of reducing the number

Active Publication Date: 2017-07-28
NANJING CEC PANDA LCD TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The main advantages of this traditional design are simple structure, simple circuit design, and fewer signal lines. will lead to a relatively large power consumption of the circuit

Method used

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  • Bidirectional grid scanning driving circuit

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Embodiment 1: The gate driver 102 of the present invention is provided with a bidirectional scanning gate drive circuit, such as image 3 and Figure 4 Shown is a schematic structural diagram of a bidirectional scanning gate drive circuit, which mainly includes multiple stage transmission control modules 1 and multiple output control modules 2 , 3 , 4 , and 5 . In design, each stage transmission control module 1 will produce multi-stage output, such as Figure 4 Shown is a first-level circuit responsible for generating 4 gate scan signals, such as image 3 As shown, the gates Gx, Gx+1, Gx+2, and Gx+3 are all connected to an output control module, and the output control module is connected to the same stage transmission control module 1, that is, each stage transmission control module 1 corresponds to multiple Output control module.

[0031] Among them, among the multiple stage transmission signals Sm, among the three adjacent stage transmission signals Sm, the previo...

Embodiment 2

[0052] Embodiment 2: The circuit structure is roughly the same as that of Embodiment 1, the difference is that a sixteenth thin film transistor M16 is added, the gate of which is connected to the control signal TC1, the source is connected to the maintenance control point netBm, and the drain is connected to the constant voltage The main function of the low-level VSS is to use the touch control signal TC1 to clear and reset the maintenance control point netBm.

[0053] Such as Figure 6 Shown is a schematic diagram of the driving waveform of one frame of the picture when the circuit is scanning forward: Figure 6 The middle T represents a frame time, GSP1 is the start signal of the forward scan; GSP2 is the start signal of the reverse scan. SCK1 and SCK2 are the clock control signals of the stage transmission module, which are mainly responsible for generating stage transmission signals, which are output sequentially during forward scanning. t means to pause for a period of ...

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PUM

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Abstract

The invention discloses a bidirectional grid scanning driving circuit. The driving circuit comprises multiple grade transmission modules and multiple output control modules. Each grade transmission control module is connected with the output control modules. A grade transmission pulling-up control point and a maintenance control point are arranged in each grade transmission control module. The grade transmission pulling-up control points and the maintenance control points transmit positive-direction scanning signals and reverse-direction scanning signals to the output control modules. According to the invention, by adopting a circuit design framework where one grade transmission control module corresponds to multiple output control modules, each grade of circuit will generate multiple grades of output, so the average quantity of thin film transistors required in each level of the circuit can be reduced; through grade transmission function modules, the bidirectional scanning function can be achieved; the circuit can be paused in any position during the displaying; and touch control signals are added to maintain the grid scanning signals during the pause period, so a touch control sensor electrode is prevented from generating coupling effects to influence image display.

Description

technical field [0001] The invention belongs to the technical field of liquid crystal display panels, and in particular relates to a gate drive circuit for bidirectional scanning. Background technique [0002] Such as figure 1 As shown, it is the design architecture of the traditional gate scanning driving circuit. The left side of the figure is the driving signal line. The circuit design adopts a 1 push 1 scheme, that is, the level 1 gate scanning driving circuit is responsible for outputting the level 1 gate scanning signal . The main advantages of this traditional design are simple structure, simple circuit design, and fewer signal lines. It will lead to a relatively large power consumption of the circuit. Contents of the invention [0003] Object of the invention: The object of the present invention is to address the shortcomings of the prior art and provide a bidirectional scanning gate drive circuit in which each stage of the circuit can generate multi-stage outpu...

Claims

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Application Information

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IPC IPC(8): G09G3/36
CPCG09G3/3674
Inventor 戴超
Owner NANJING CEC PANDA LCD TECH