Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Gate driving circuit

A technology of gate drive circuit and drive circuit, which is applied in the direction of electrical digital data processing, static memory, instrument, etc., can solve the problems of affecting pre-charging, poor dark or bright lines, insufficient pixel charging rate, etc., to avoid RG too large , to avoid the effect of turn-on delay time

Inactive Publication Date: 2018-02-16
重庆秉为科技有限公司
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is that the PU point potential will leak through the connected TFT, thereby seriously affecting the pre-charging of the N / 2+1 row shift register unit, so that when the N / 2+1 row shift register unit outputs the voltage decrease, resulting in insufficient charging rate of pixels in this row, and poor dark or bright lines. The purpose is to provide a gate drive circuit to solve the problem that the PU point potential will leak through the connected TFT, which will seriously affect the N / 2+1 row shift. The pre-charging of the register unit makes the voltage drop when the shift register unit in the N / 2+1 row is output, which leads to insufficient charging rate of the pixels in this row, and the problem of dark or bright lines.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] A gate drive circuit of the present invention includes a drive circuit connected by a plurality of shift register units, the drive circuit includes a photocoupler and an optocoupler driver, step 1: use optocoupler to achieve electrical isolation, and the optocoupler is Fast type, controlling high-frequency switching operation, the primary side of the optocoupler has been connected in series with a current limiting resistor, and the voltage is directly applied to the input side; Step 2: Adopt a dual power supply drive structure, integrating an optocoupler with high isolation voltage and overcurrent Protection circuit; step 3: overcurrent protection output signal terminal and input interface compatible with TTL level, the maximum delay of the driving electrical signal is 1.5u; step 4: in the gate drive circuit, the nearest optocoupler The shift register unit performs gate row drive scanning; step 5: in the gate drive circuit, the shift register unit located near the photoc...

Embodiment 2

[0018] A gate drive circuit of the present invention includes a drive circuit connected by a plurality of shift register units, the drive circuit includes a photocoupler and an optocoupler driver, step 1: use optocoupler to achieve electrical isolation, and the optocoupler is Fast type, controlling high-frequency switching operation, the primary side of the optocoupler has been connected in series with a current limiting resistor, and the voltage is directly applied to the input side; Step 2: Adopt a dual power supply drive structure, integrating an optocoupler with high isolation voltage and overcurrent Protection circuit; step 3: overcurrent protection output signal terminal and input interface compatible with TTL level, the maximum delay of the driving electrical signal is 1.5u; step 4: in the gate drive circuit, the nearest optocoupler The shift register unit performs gate row drive scanning; step 5: in the gate drive circuit, the shift register unit located near the photoc...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a gate drive circuit, which includes a drive circuit connected by a plurality of shift register units. The drive circuit includes a photocoupler and a photocoupler driver. The coupler is a fast type, which controls the high-frequency switching operation. The primary side of the optocoupler has a current-limiting resistor in series, and the voltage is directly applied to the input side; Step 2: Adopt a dual power supply drive structure, and integrate an optocoupler with high isolation voltage and Overcurrent protection circuit; step 3: overcurrent protection output signal terminal and input interface compatible with TTL level, the maximum delay of the driving electrical signal is 1.5u; step 4: in the gate drive circuit, located in the photocoupler The nearest shift register unit performs gate row drive scanning; step 5: in the gate drive circuit, the nearest shift register unit located in the photocoupler performs gate row drive scan; step 6: for steps 4 and 5 scan results in .

Description

technical field [0001] The invention relates to a circuit driving method, in particular to a gate driving circuit. Background technique [0002] With the increasing popularity of touch-sensitive display devices, people have higher and higher quality requirements for touch-sensitive display devices. In-cell touch technology is It is widely used due to its high advantages. [0003] A traditional GOA circuit usually includes a plurality of cascaded shift register units, wherein each shift register unit is respectively connected to an adjacent row of shift register units, and each shift register unit corresponds to a row of gate lines. When a row of shift register units outputs a gate driving signal, the next row of shift register units is precharged to ensure that the next row of shift register units realizes output in the next clock cycle. In the prior art, the shift register unit takes the simplest 4T1C structure as an example, because the N / 2+1 row shift register unit is t...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): G09G3/20G11C19/28G06F3/041
CPCG09G3/20G06F3/041G09G2310/0286G11C19/28
Inventor 卢先贵王俊
Owner 重庆秉为科技有限公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products