CN1304887C - Electrostatic discharge protection circuit - Google Patents
Electrostatic discharge protection circuit Download PDFInfo
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- CN1304887C CN1304887C CNB2004100917197A CN200410091719A CN1304887C CN 1304887 C CN1304887 C CN 1304887C CN B2004100917197 A CNB2004100917197 A CN B2004100917197A CN 200410091719 A CN200410091719 A CN 200410091719A CN 1304887 C CN1304887 C CN 1304887C
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Abstract
The present invention relates to an electrostatic discharge protective circuit which is suitable to be arranged on a panel of a liquid crystal display. A plurality of parallel data wiring and a plurality of parallel scanning wiring perpendicular to the data wiring are arranged on the panel of the liquid crystal display The electrostatic discharge protective circuit is mainly composed of a plurality of electrostatic discharge protective units, at least one grounded line and at least one serially connected line, wherein the electrostatic discharge protective units are arranged on the panel of the liquid crystal display, and each electrostatic discharge protective unit forms an electric connection with one string of scanning wiring or data wiring; the grounded line forms an electrical connection with the electrostatic discharge protective units; at least one serially connected line forms an electric connection with two electrostatic discharge protective units in the panel.
Description
Technical field
The present invention relates to a kind of circuit, particularly relate to a kind of LCD (LiquidCrystal Display, ESD protection circuit LCD) (ELECTRO-STATIC DISCHARGEPROTECTION CIRCUIT) of being applied to.
Background technology
At improving rapidly of multimedia society, be indebted to the tremendous progress of semiconductor subassembly or man-machine display device mostly.With regard to display, (Cathode Ray Tube CRT) because of having excellent display quality and its economy, monopolizes monitor market in recent years to cathode-ray tube (CRT) always.Yet, operate the environment of most terminating machine/display equipments on the table for the individual, or with the incision of the viewpoint of environmental protection, if predicted with the trend of saving the energy, cathode-ray tube (CRT) is because of still existing a lot of problems in space utilization and the energy resource consumption, and can't effectively provide solution for the demand of light, thin, short, little and low consumpting power.Therefore, have that high image quality, space utilization efficient add, the LCD of low consumpting power, advantageous characteristic such as radiationless becomes the main flow in market gradually.
General LCD is assembled by a display panels (LCD panel) and a backlight module (back light module), and on the display panels be with manufacture of semiconductor (semiconductor process) formed many scan wirings (scan line), data distribution (data line), thin film transistor (TFT) (Thin Film Transistor, TFT) ... etc. non-one-tenth meticulous circuit and assembly.In the manufacture process of display panels, no matter be that manufacturing equipment, operating personnel and display panels itself all may be accumulated many static charges.Therefore, when display panels touches manufacturing equipment, operating personnel or other object in manufacture process, all probably cause the phenomenon of static discharge.Because circuit and assembly on the LCD are all very fine, therefore, just be easy to produce the consequence that whole liquid crystal display panel need be scrapped as long as there is the phenomenon of static discharge to produce slightly.For solving the low excessively problem of acceptance rate that the static discharge phenomenon causes display panels, generally be to solve in the mode that on display panels, designs ESD protection circuit.
See also shown in Figure 1A and Figure 1B, it is the circuit diagram of existing known its two kinds of actuator states of electrostatic discharge (ESD) protection unit.See also Figure 1A and Figure 1B, existing known electrostatic discharge (ESD) protection unit 100 mainly is made up of eight diodes (diode) D1～D8, and is electrically connected to a data distribution DL10 on the display panels (not shown).When static charge by Figure 1A in data wiring DL10 when entering, the static charge of forward bias can be via four paths such as diode D4 → D8, diode D4 → D7, diode D3 → D8 and diode D3 → D7 and is passed to a ground path GND10, and by this static charge is led off fast.When static charge by Figure 1B in data wiring DL10 when entering, the static charge of reverse biased can be led off fast via the path of diode D5 → D2.
Yet; in above-mentioned existing known electrostatic discharge (ESD) protection unit 100; the quantity of electric charge when surpassing its load when the moment static discharge; static charge will enter a display module array district A10 by data distribution DL10, and causes for example damage of assembly such as thin film transistor (TFT) among the display module array district A10.
This shows that above-mentioned existing ESD protection circuit obviously still has inconvenience and defective, and demands urgently further being improved in structure and use.In order to solve the problem that ESD protection circuit exists; relevant manufacturer there's no one who doesn't or isn't seeks solution painstakingly; but do not see always that for a long time suitable design finished by development; and common product does not have appropriate structure to address the above problem, and this obviously is the problem that the anxious desire of relevant dealer solves.
Because the defective that above-mentioned existing ESD protection circuit exists; the inventor is based on being engaged in this type of product design manufacturing abundant for many years practical experience and professional knowledge; and the utilization of cooperation scientific principle; actively studied innovation; in the hope of founding a kind of ESD protection circuit of new structure; can improve general existing ESD protection circuit, make it have more practicality.Through constantly research, design, and after studying sample and improvement repeatedly, create the present invention who has practical value finally.
Summary of the invention
The objective of the invention is to, overcome the defective that existing ESD protection circuit exists, and a kind of new ESD protection circuit is provided, technical matters to be solved is to make its acceptance rate that is suitable for promoting LCD, thereby is suitable for practicality more.
The present invention compared with prior art has tangible advantage and beneficial effect.By above technical scheme as can be known, in order to reach aforementioned goal of the invention, the present invention proposes a kind of ESD protection circuit, and it is suitable for being configured on the display panels.Have many first distributions that are parallel to each other on the liquid crystal panel.This ESD protection circuit is made of a plurality of first electrostatic discharge (ESD) protection unit, at least one ground path and at least one the first tandem links.These first electrostatic discharge (ESD) protection configuration of cells are on display panels, and each first electrostatic discharge (ESD) protection unit is to electrically connect with one first distribution.Ground path and the aforementioned first electrostatic discharge (ESD) protection unit electrically connect.First tandem link electrically connects with at least two first electrostatic discharge (ESD) protection unit.
In this ESD protection circuit; also many second distributions being parallel to each other of tool on the liquid crystal panel; and these second distributions are vertical with first distribution, and ESD protection circuit for example more comprises a plurality of second electrostatic discharge (ESD) protection unit and at least one the second tandem links.These second electrostatic discharge (ESD) protection configuration of cells are on display panels, and each second electrostatic discharge (ESD) protection unit for example is to electrically connect with one second distribution.Ground path for example also electrically connects with these second electrostatic discharge (ESD) protection unit.Second tandem link for example electrically connects with at least two second electrostatic discharge (ESD) protection unit.
In addition, second tandem link for example is to electrically connect with all second electrostatic discharge (ESD) protection unit.Perhaps, second tandem link comprises a plurality of line patterns, and also has a plurality of second chip for driving on the liquid crystal panel, and each line pattern is part second distribution electric connection of controlling with one second chip for driving.
In addition, each second electrostatic discharge (ESD) protection unit for example comprises a plurality of diodes of mutual electric connection.
Moreover above-mentioned first distribution for example is a data wiring, and above-mentioned second distribution for example is to scan distribution.
Certainly, above-mentioned first distribution also can be data wiring or scan distribution.
Moreover first tandem link for example is to electrically connect with all first electrostatic discharge (ESD) protection unit.Perhaps, first tandem link comprises a plurality of line patterns, and also has a plurality of first chip for driving on the liquid crystal panel, and each line pattern is part first distribution electric connection of controlling with one first chip for driving.
In addition, each first electrostatic discharge (ESD) protection unit for example comprises a plurality of diodes of mutual electric connection.
Via as can be known above-mentioned, the invention relates to a kind of ESD protection circuit, it is suitable for being configured on the display panels.The plurality of scanning wirings that has many data wirings being parallel to each other and vertical data distribution on the liquid crystal panel and be parallel to each other.This ESD protection circuit is made of a plurality of electrostatic discharge (ESD) protections unit, at least one ground path and at least one tandem link.These electrostatic discharge (ESD) protection configuration of cells are on display panels, and each electrostatic discharge (ESD) protection unit is to electrically connect with a scan wiring or data wiring.Ground path and aforementioned electrostatic discharge (ESD) protection unit electrically connect.At least one tandem link electrically connects with at least two electrostatic discharge (ESD) protection unit in the panel.
By technique scheme, ESD protection circuit of the present invention has following advantage at least:
ESD protection circuit of the present invention is owing to utilize at least one tandem link and the electric connection of a plurality of electrostatic discharge (ESD) protections unit; therefore can when static discharge, fast static charge be dispersed to a plurality of electrostatic discharge (ESD) protections unit; and then reduce static discharge to display panels the destruction that may cause, promote the product fine rate of display panels simultaneously.
In sum, the ESD protection circuit of special construction of the present invention has promoted the acceptance rate of LCD.It has above-mentioned many advantages and practical value; and in like product, do not see have similar structural design to publish or use and really genus innovation; no matter it structurally or bigger improvement all arranged on the function; have large improvement technically; and produced handy and practical effect, and more existing ESD protection circuit has the multinomial effect of enhancement, thus be suitable for practicality more; and have the extensive value of industry, really be a new and innovative, progressive, practical new design.
Above-mentioned explanation only is the general introduction of technical solution of the present invention, for can clearer understanding technological means of the present invention, and can be implemented according to the content of instructions, and for above-mentioned and other purposes, feature and advantage of the present invention can be become apparent, below especially exemplified by going out a plurality of preferred embodiments, and conjunction with figs., be described in detail as follows.
Description of drawings
Figure 1A and Figure 1B are the circuit diagrams of existing known its two kinds of actuator states of electrostatic discharge (ESD) protection unit.
Fig. 2 is that ESD protection circuit of the present invention is configured in the synoptic diagram on the display panels.
Fig. 3 A and Fig. 3 B are the circuit diagrams of its two kinds of actuator states of ESD protection circuit of one embodiment of the invention.
Fig. 4 A～4C is the synoptic diagram of the connected mode of three kinds of tandem links in the ESD protection circuit of the present invention.
Fig. 5 A and Fig. 5 B are the circuit diagrams of its two kinds of actuator states of ESD protection circuit of another embodiment of the present invention.
100: electrostatic discharge (ESD) protection cells D L10: data distribution
GND10: ground path A10: display module array district
50: display panels ESD, 200,300: ESD protection circuit
210,310: electrostatic discharge (ESD) protection unit 230,330: ground path
240,340: tandem link A20: display module array district
A22: picture element region D1～D14: diode
DL20: data distribution GL20: scan wiring
Embodiment
Reach technological means and the effect that predetermined goal of the invention is taked for further setting forth the present invention; below in conjunction with accompanying drawing and preferred embodiment; to its embodiment of ESD protection circuit, structure, feature and the effect thereof that foundation the present invention proposes, describe in detail as after.
See also shown in Figure 2ly, it is that ESD protection circuit of the present invention is configured in the synoptic diagram on the display panels.See also Fig. 2, have many data wiring DL20 that are parallel to each other and the plurality of scanning wirings GL20 that is parallel to each other on the display panels 50, wherein the vertical data distribution of scan wiring GL20 DL20.In addition, data wiring DL20 and scan wiring GL20 are divided into a plurality of picture element regions (pixel region) A22 with a display module array district A20 on the display panels 50.Dispose a driving component (not shown) in each picture element region A22, it for example is thin film transistor (TFT) or other driving component.ESD protection circuit ESD of the present invention is suitable for being disposed at by the display module array district A20, only simply illustrates in Fig. 2.
See also shown in Fig. 3 A and Fig. 3 B, it is the circuit diagram of its two kinds of actuator states of ESD protection circuit of one embodiment of the invention, and Fig. 4 A～4C is the synoptic diagram of the connected mode of three kinds of tandem links in the ESD protection circuit of the present invention.
See also Fig. 3 A and Fig. 3 B, the ESD protection circuit 200 of present embodiment is made of a plurality of electrostatic discharge (ESD) protections unit 210, a ground path 230 and at least one tandem link 240.Each electrostatic discharge (ESD) protection unit 210 is to electrically connect with a data wiring DL20.For example electrostatic discharge (ESD) protection unit 210 and data wiring DL20 electrically connect in mode one to one.Ground path 230 electrically connects with each electrostatic discharge (ESD) protection unit 210.In addition, at least two electrostatic discharge (ESD) protection unit 210 are to electrically connect with tandem link 240, and the electrostatic discharge (ESD) protection unit 210 that tandem link 240 electrically connected is for good, shown in Fig. 4 A with adjacent one another are.
Certainly, shown in Fig. 4 C, tandem link 240 also can electrically connect with all electrostatic discharge (ESD) protection unit 210.Perhaps, ESD protection circuit 200 comprises many tandem links 240, and every tandem link 240 is data wiring DL20 electric connections of being controlled with a data chip for driving (not shown).In other words, the data wiring DL20 that same data driving chip is controlled on all corresponding liquid crystal panel in electrostatic discharge (ESD) protection unit 210 that each bar tandem link 240 is connected is shown in Fig. 4 B.
Please continue to consult Fig. 3 A, each electrostatic discharge (ESD) protection unit 210 for example is made up of eight diode D1～D8.Wherein, diode D3, D4, D7 and D8 belong to forward diode for entering from data wiring DL20 Fig. 3 A and having for the static charge of forward bias, and diode D1, D2, D5 and D6 then belong to backward dioded for entering from data wiring DL20 Fig. 3 A and having for the static charge of forward bias.In other words, data wiring DL20 enters and static charge with forward bias can be passed through diode D3, D4, D7 and D8 from Fig. 3 A.
Importantly, several adjacent electrostatic discharge (ESD) protection unit 210 have utilized a tandem link 240 and electric connection mutually in the present embodiment.Therefore; from Fig. 3 A any data wiring DL20 enter and static charge with forward bias by behind the diode D3 and D4 of an electrostatic discharge (ESD) protection unit 210; can derive by diode D7 and the D8 from all electrostatic discharge (ESD) protection unit 210 that link to each other by tandem link 240, outwards lead off by ground path 230 again.See also Fig. 3 B, in the same manner, the static charge with reverse biased also can increase static by the effect of tandem link 240 and lead the path off.In other words, when the static discharge phenomenon took place at every turn, the static that the ESD protection circuit 200 of present embodiment is provided was led the existing known technology in path off and is had more very many times.The better protection effect of display panels of the ESD protection circuit 200 that adopts present embodiment can be provided by this.
See also shown in Fig. 5 A and Fig. 5 B, it is the circuit diagram of its two kinds of actuator states of ESD protection circuit of another embodiment of the present invention.See also Fig. 5 A, the ESD protection circuit 300 of present embodiment is identical with the ESD protection circuit 200 of last embodiment, is made of a plurality of electrostatic discharge (ESD) protections unit 310, a ground path 330 and at least one tandem link 340.Wherein, only electrostatic discharge (ESD) protection unit 310 is different with last embodiment, and the connected mode of all the other members and each member is then identical with last embodiment, promptly omits its explanation at this.
Each electrostatic discharge (ESD) protection unit 310, it for example is made up of six diode D9～D14.Wherein, diode D12 and D14 belong to forward diode for entering from data wiring DL20 Fig. 5 A and having for the static charge of forward bias, and diode D9, D10, D11 and D13 then belong to backward dioded for entering from data wiring DL20 Fig. 5 A and having for the static charge of forward bias.In other words, data wiring DL20 enters and static charge with forward bias can be passed through diode D12 and D14 from Fig. 5 A.
Because several adjacent electrostatic discharge (ESD) protection unit 310 have utilized a tandem link 340 and electric connection mutually in the present embodiment.Therefore; from Fig. 5 A any data wiring DL20 enter and static charge with forward bias by behind the diode D12 of an electrostatic discharge (ESD) protection unit 310; can derive by the diode D14 from all electrostatic discharge (ESD) protection unit 310 that link to each other by tandem link 340, outwards lead off by ground path 330 again.See also Fig. 5 B, in the same manner, the static charge with reverse biased also can increase static by the effect of tandem link 340 and lead the path off.In other words, when the static discharge phenomenon took place at every turn, the ESD protection circuit 300 of present embodiment was identical with last embodiment, and the static that it provided is led the existing known technology in path off and had more very many times.
It should be noted that; though the electrostatic discharge (ESD) protection unit is an example to electrically connect data wiring all in above-mentioned two kinds of embodiment; but ESD protection circuit of the present invention also can electrically connect its electrostatic discharge (ESD) protection unit and scan wiring, and reaches the purpose of the electrostatic discharge (ESD) protection of strengthening display panels by the tandem link that electrically connects the electrostatic discharge (ESD) protection unit.Simultaneously, ESD protection circuit of the present invention also can electrically connect its electrostatic discharge (ESD) protection unit and scan wiring and data wiring certainly, and carries out leading off of static by ground path.In addition, in the ESD protection circuit of the present invention, the form of electrostatic discharge (ESD) protection unit is not limited to aforementioned two kinds of embodiment.Main spirit of the present invention strengthens ESD protection circuit for the Electrostatic protection ability by this using tandem link to connect each electrostatic discharge (ESD) protection unit.
The above, it only is preferred embodiment of the present invention, be not that the present invention is done any pro forma restriction, though the present invention discloses as above with preferred embodiment, yet be not in order to limit the present invention, any those skilled in the art, in not breaking away from the technical solution of the present invention scope, when the technology contents that can utilize above-mentioned announcement is made a little change or is modified to the equivalent embodiment of equivalent variations, in every case be the content that does not break away from technical solution of the present invention, according to technical spirit of the present invention to any simple modification that above embodiment did, equivalent variations and modification all still belong in the scope of technical solution of the present invention.
Claims (10)
1, a kind of ESD protection circuit is suitable for being configured on the display panels, wherein has most bars first distribution that is parallel to each other on this liquid crystal panel, it is characterized in that this ESD protection circuit comprises:
Most first an electrostatic discharge (ESD) protection unit are configured on this display panels, and wherein each those first electrostatic discharge (ESD) protection unit is and those one of them electric connections of first distribution;
At least one ground path electrically connects with those first electrostatic discharge (ESD) protection unit; And
At least one first tandem link is electrically connected to wherein at least two first electrostatic discharge (ESD) protection unit, those first electrostatic discharge (ESD) protection unit.
2, ESD protection circuit according to claim 1 is characterized in that wherein having most bars second distribution that is parallel to each other on this liquid crystal panel, and those second distributions are vertical with those first distributions, and this ESD protection circuit more comprises:
Most second an electrostatic discharge (ESD) protection unit, be configured on this display panels, wherein each those second electrostatic discharge (ESD) protection unit is and those one of them electric connections of second distribution, and this ground path and the electric connection of those second electrostatic discharge (ESD) protection unit; And
At least one second tandem link is electrically connected to wherein at least two second electrostatic discharge (ESD) protection unit, those second electrostatic discharge (ESD) protection unit.
3, ESD protection circuit according to claim 2 is characterized in that wherein this second tandem link is that those second electrostatic discharge (ESD) protection unit electrically connect with all.
4, ESD protection circuit according to claim 2; it is characterized in that wherein this second tandem link comprises most line patterns; and have most second chip for driving on this liquid crystal panel, and each those line pattern is to electrically connect with those second distributions of those one of them parts of being controlled of second chip for driving.
5, ESD protection circuit according to claim 2 is characterized in that each those second electrostatic discharge (ESD) protection unit wherein comprise most diodes of mutual electric connection.
6, ESD protection circuit according to claim 2 is characterized in that wherein those first distributions comprise data wiring, and those second distributions comprise and scan distribution.
7, ESD protection circuit according to claim 1 is characterized in that wherein those first distributions comprise data wiring or scan distribution.
8, ESD protection circuit according to claim 1 is characterized in that wherein this first tandem link is that those first electrostatic discharge (ESD) protection unit electrically connect with all.
9, ESD protection circuit according to claim 1; it is characterized in that wherein this first tandem link comprises most line patterns; and have most first chip for driving on this liquid crystal panel, and each those line pattern is to electrically connect with those first distributions of those one of them parts of being controlled of first chip for driving.
10, ESD protection circuit according to claim 1 is characterized in that each those first electrostatic discharge (ESD) protection unit wherein comprise most diodes of mutual electric connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100917197A CN1304887C (en) | 2004-11-25 | 2004-11-25 | Electrostatic discharge protection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100917197A CN1304887C (en) | 2004-11-25 | 2004-11-25 | Electrostatic discharge protection circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1610480A CN1610480A (en) | 2005-04-27 |
| CN1304887C true CN1304887C (en) | 2007-03-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2004100917197A Active CN1304887C (en) | 2004-11-25 | 2004-11-25 | Electrostatic discharge protection circuit |
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| CN (1) | CN1304887C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8300198B2 (en) | 2008-05-09 | 2012-10-30 | Chimei Innolux Corporation | Liquid crystal panel |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100389341C (en) * | 2005-08-08 | 2008-05-21 | 友达光电股份有限公司 | Active element array substrate |
| KR20070119344A (en) * | 2006-06-15 | 2007-12-20 | 엘지.필립스 엘시디 주식회사 | Liquid crystal display device |
| CN105629602A (en) * | 2016-03-09 | 2016-06-01 | 深圳市华星光电技术有限公司 | Liquid crystal device |
| CN109817133A (en) * | 2019-03-13 | 2019-05-28 | 惠科股份有限公司 | A kind of electrostatic protection apparatus of display panel, method and display device |
| CN111243429B (en) * | 2020-02-13 | 2021-11-09 | 京东方科技集团股份有限公司 | Display panel and display device |
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|---|---|---|---|---|
| CN2202323Y (en) * | 1993-07-22 | 1995-06-28 | 三星电管株式会社 | Liquid crystal display with antistatic structure |
| US20010030716A1 (en) * | 2000-04-12 | 2001-10-18 | Park Jeong Ki | Liquid crystal display |
| CN1376544A (en) * | 2001-03-22 | 2002-10-30 | 神基科技股份有限公司 | Antistatic surface coating structure and method for LCD |
| CN1542527A (en) * | 2003-04-29 | 2004-11-03 | 明基电通股份有限公司 | Electronic apparatus and antistatic discharge method thereof |
-
2004
- 2004-11-25 CN CNB2004100917197A patent/CN1304887C/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2202323Y (en) * | 1993-07-22 | 1995-06-28 | 三星电管株式会社 | Liquid crystal display with antistatic structure |
| US20010030716A1 (en) * | 2000-04-12 | 2001-10-18 | Park Jeong Ki | Liquid crystal display |
| CN1376544A (en) * | 2001-03-22 | 2002-10-30 | 神基科技股份有限公司 | Antistatic surface coating structure and method for LCD |
| CN1542527A (en) * | 2003-04-29 | 2004-11-03 | 明基电通股份有限公司 | Electronic apparatus and antistatic discharge method thereof |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8300198B2 (en) | 2008-05-09 | 2012-10-30 | Chimei Innolux Corporation | Liquid crystal panel |
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| Publication number | Publication date |
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| CN1610480A (en) | 2005-04-27 |
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