CN2852600Y - Electrostatic discharge protection circuit - Google Patents
Electrostatic discharge protection circuit Download PDFInfo
- Publication number
- CN2852600Y CN2852600Y CN 200520119940 CN200520119940U CN2852600Y CN 2852600 Y CN2852600 Y CN 2852600Y CN 200520119940 CN200520119940 CN 200520119940 CN 200520119940 U CN200520119940 U CN 200520119940U CN 2852600 Y CN2852600 Y CN 2852600Y
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- CN
- China
- Prior art keywords
- drive
- electrostatic
- discharging element
- protection circuit
- electrostatic discharge
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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- Liquid Crystal (AREA)
- Elimination Of Static Electricity (AREA)
Abstract
The utility model provides an electrostatic discharge protection circuit which comprises a drive IC and one electrostatic discharge element at least, wherein the drive IC is provided with a plurality of pins, the electrostatic discharge element is used for releasing the static electricity of the drive IC, the electrostatic discharge element is directly connected with one of the pins of the drive IC and the other end of the electrostatic discharge element is grounded. The electrostatic discharge element can quickly release the static electricity of the drive IC to protect the drive IC not to be damaged by electrostatic discharge.
Description
[technical field]
The utility model is that (Electrostatic Discharge, ESD) protection circuit is particularly about the electrostatic storage deflection (ESD) protection circuit of a kind of liquid crystal display-driving IC about a kind of static discharge.
[background technology]
Static discharge roughly is divided into three kinds of discharge modes, is respectively that static discharge, furniture that various machines cause move or equipment moves the static discharge that causes and contacts the static discharge that causes with human body.These three kinds of discharge modes are all extremely important for producing semiconductor device and electronic product.Static discharge can damage the interface device that is attached thereto generally speaking, and another kind of situation is that it(?) not possible can damage immediately by the device after static discharge impacts, but decreased performance causes product to break down too early.When drive IC stood static discharge, the resistance of discharge loop was all very little usually, can't limit discharging current.Instantaneous large-current can major injury drive IC, the heat of local pyrexia even can melt the silicon chip tube core.Static discharge comprises also that to the damage of drive IC the interior metal connection is blown, and passivation layer is damaged, and transistor unit is burnt out.
At present liquid crystal display-driving IC electrostatic storage deflection (ESD) protection circuit design mostly on the interface that connects between drive system and the liquid crystal display-driving IC or plug-in printed circuit board (PCB) (Printed Circuit Board, PCB) on.Static also can discharge by the electrostatic storage deflection (ESD) protection circuit of liquid crystal display-driving IC inside, but, be subject to considering of manufacture of semiconductor and cost, can't do the inner protecting component for electrostatic discharge of liquid crystal display-driving IC to such an extent that more effectively its inner static is discharged fully.
Please refer to Fig. 1, is a kind of prior art display panels schematic diagram.This display panels 10 comprises substrate 2, drive IC 3, flexible circuit board (FPC, FlexiblePrinted Circuit, FPC) 4 and many leads 6.Comprise a plurality of pins 41, lead 43, electrostatic discharging element 45 and control system 47 on this flexible circuit board 4.This drive IC 3 is positioned on the substrate 2, and this flexible circuit board 4 links to each other with substrate 2 by pin 41 and links to each other with drive IC 3 by lead 6.The quantity of this pin 41 and lead 6 is corresponding with the pin number of drive IC.Thereby this electrostatic discharging element 45 links to each other with wherein a pin 41 by lead 43 and realizes being electrically connected with drive IC 3 formation.This control system 47 is connected with electrostatic discharging element 45 and is used to control this electrostatic discharging element 45 its static with drive IC 3 is discharged.This electrostatic discharging element 45 other end ground connection or link to each other with power supply (figure do not show) output.
Though this electrostatic discharging element 45 can discharge the electric current in the drive IC 3,, its distance apart from drive IC 3 is far away, and the static that can't reach drive IC 3 discharges fully, thereby influences the performance of drive IC 3.
[utility model content]
Discharge fully in order to overcome the static that the prior art electrostatic discharge circuit can't reach drive IC, thereby influence the drive IC performance defect, be necessary to provide a kind of electrostatic storage deflection (ESD) protection circuit that effectively drive IC static is discharged fast.
A kind of electrostatic storage deflection (ESD) protection circuit, it comprises that one has the drive IC of a plurality of pins and the electrostatic discharging element of at least one release drive IC static, wherein, this electrostatic discharging element directly is connected with one of them pin of drive IC, its other end ground connection.
Compared to prior art, the utility model electrostatic discharging element directly is connected with the pin of drive IC, and the position is near drive IC, thereby therefore the static of energy rapid release drive IC reaches the effect of protecting drive IC.
[description of drawings]
Fig. 1 is a kind of prior art display panels schematic diagram.
Fig. 2 is the utility model electrostatic storage deflection (ESD) protection circuit schematic diagram.
Fig. 3 is the utility model electrostatic discharging element concrete structure figure.
[embodiment]
Please refer to Fig. 2, is the utility model electrostatic storage deflection (ESD) protection circuit schematic diagram.Display panels 100 comprises substrate 12, drive IC 13, flexible circuit board 14, electrostatic discharging element 15 and many leads 16.Comprise a plurality of pins 141 and control system 147 on this flexible circuit board 14.This drive IC 13 is positioned on the substrate 12, and this flexible circuit board 4 links to each other with substrate 12 by pin 141 and links to each other with drive IC 13 by lead 16.This electrostatic discharging element 15 is positioned on the substrate 12 and is electrically connected with one of them pin of drive IC 13 and one of them pin 141 formation of flexible circuit board 14 by a lead 16 wherein.The other end ground connection of this electrostatic discharging element 15 or link to each other with power supply (figure do not show) output.This control system 147 is connected with drive IC 13 and is used to control this drive IC 13.
The utility model designs electrostatic discharging element 15 on the substrate of thin-film transistor wiring, and the PCB circuit of collocation drive IC 13 and leading portion is integrated into a complete protection circuit.One group of electrostatic discharging element 15 of series design on the routing path of the most close drive IC input, and with the conduction the loop be connected to nearest power supply, for example InputPower, VCOM, VGH or VGL etc. avoid static discharge directly to have influence on drive IC.
Please refer to Fig. 3, is the utility model electrostatic discharging element 15 concrete structure figure.This electrostatic discharging element 155 comprises diode 151, diode 152 and an electric capacity 153 respectively.Connect this electric capacity 153 between the anode series connection of this diode 151 and diode 152, the negative electrode, the plus earth of this series connection, two negative electrodes link to each other with a wherein pin of drive IC 13.
One of them pin that the utility model only illustrates drive IC 13 is connected with electrostatic discharging element 15; in fact; can increase the quantity of electrostatic discharging element 15 as required, the corresponding electrostatic discharging element of each pin, thus can protect a plurality of pin protection drive IC 13.The utility model control system 147 not only can be positioned on the flexible circuit board 14,24, also can be positioned on the pcb board or other position of display panels.
Claims (3)
1. electrostatic storage deflection (ESD) protection circuit, it comprises that one has the drive integrated circult of a plurality of pins and the electrostatic discharging element of at least one release drive integrated circult static, it is characterized in that: this electrostatic discharging element directly is connected with one of them pin of drive integrated circult, its other end ground connection.
2. electrostatic storage deflection (ESD) protection circuit as claimed in claim 1, it is characterized in that: this electrostatic discharging element comprises one first diode, one second diode and an electric capacity, connect this electric capacity between the anode series connection of this first diode and this second diode, the negative electrode, the plus earth of this series connection, negative electrode link to each other with a wherein pin of this drive integrated circult respectively.
3. electrostatic storage deflection (ESD) protection circuit as claimed in claim 1, it is characterized in that: this electrostatic discharging element is a plurality of, one end of each electrostatic discharging element directly is connected with the pin of drive integrated circult by lead respectively, the other end ground connection of each electrostatic discharging element.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520119940 CN2852600Y (en) | 2005-12-05 | 2005-12-05 | Electrostatic discharge protection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520119940 CN2852600Y (en) | 2005-12-05 | 2005-12-05 | Electrostatic discharge protection circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2852600Y true CN2852600Y (en) | 2006-12-27 |
Family
ID=37586555
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200520119940 Expired - Lifetime CN2852600Y (en) | 2005-12-05 | 2005-12-05 | Electrostatic discharge protection circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2852600Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102193259A (en) * | 2010-03-15 | 2011-09-21 | 上海天马微电子有限公司 | Liquid crystal display device |
| CN103278972A (en) * | 2013-04-28 | 2013-09-04 | 合肥京东方光电科技有限公司 | Array substrate and display device |
| CN110967852A (en) * | 2019-11-20 | 2020-04-07 | Tcl华星光电技术有限公司 | Liquid crystal display device having a plurality of pixel electrodes |
-
2005
- 2005-12-05 CN CN 200520119940 patent/CN2852600Y/en not_active Expired - Lifetime
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102193259A (en) * | 2010-03-15 | 2011-09-21 | 上海天马微电子有限公司 | Liquid crystal display device |
| CN102193259B (en) * | 2010-03-15 | 2015-07-22 | 上海天马微电子有限公司 | Liquid crystal display device |
| CN103278972A (en) * | 2013-04-28 | 2013-09-04 | 合肥京东方光电科技有限公司 | Array substrate and display device |
| WO2014176817A1 (en) * | 2013-04-28 | 2014-11-06 | 合肥京东方光电科技有限公司 | Array substrate and display device |
| CN103278972B (en) * | 2013-04-28 | 2015-09-09 | 合肥京东方光电科技有限公司 | A kind of array base palte and display device |
| CN110967852A (en) * | 2019-11-20 | 2020-04-07 | Tcl华星光电技术有限公司 | Liquid crystal display device having a plurality of pixel electrodes |
| CN110967852B (en) * | 2019-11-20 | 2021-04-27 | Tcl华星光电技术有限公司 | Liquid crystal display device having a plurality of pixel electrodes |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20061227 |
|
| EXPY | Termination of patent right or utility model |