CN101093297A - Electrostatic protection circuit for liquid crystal display - Google Patents
Electrostatic protection circuit for liquid crystal display Download PDFInfo
- Publication number
- CN101093297A CN101093297A CN 200610095911 CN200610095911A CN101093297A CN 101093297 A CN101093297 A CN 101093297A CN 200610095911 CN200610095911 CN 200610095911 CN 200610095911 A CN200610095911 A CN 200610095911A CN 101093297 A CN101093297 A CN 101093297A
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- suspension joint
- electrostatic discharge
- joint unit
- protection circuit
- circuit board
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Abstract
A static protection circuit of liquid crystal display is prepared for providing liquid crystal display module, designing dummy lead wire as path of static-discharge on x side printed circuit board and film material of carrier-driving integrated circuit then utilizing dummy pin and ITO electrode already set on said film material to form a low impedance discharge path, adding multiple conductive pad on said low impedance discharge path to lead static to be discharged off at said conductive pad.
Description
[technical field]
The present invention is the electrostatic protection apparatus of relevant a kind of LCD, and the electrostatic protection apparatus of the LCD of the one-sided printed circuit board (PCB) of a kind of tool particularly is provided.
[background technology]
LCD be a kind of in light weight, volume is little, can save more spaces and the display device of low power consumption, radiationless, low flicker.The most thorny issue in the middle of the production run of LCD is exactly static discharge (Electrostatic Discharge, generation ESD).Known LCD is avoided one of method that ESD takes place, be by printed circuit board (PCB) (Print Circuit Board, the PCB) fixed screw on (screw) forms a low-impedance discharge path; As shown in Figure 1, when static discharge takes place, be released into X side printed circuit board (PCB) 2 by screw hole (screw hole) 8a that reserves on the printed circuit board (PCB), or be released into Y side printed circuit board (PCB) 4 by the screw hole 8b that reserves on the printed circuit board (PCB), electrostatic guide to earth terminal (ground) is discharged, avoid static pass through source electrode driven integrated circuit (Integrate Circuit, IC) 12, grid-driving integrated circuit 14, or the electrode in the display panels.Moreover (Flexible Print Circuit, FPC) 6 connect X side printed circuit board (PCB) 2 and Y side printed circuit board (PCB) 4, in order to be used as the bridge of electrical signals to utilize flexible PCB.Yet, when liquid crystal display device module adopts no Y side printed circuit board (PCB) (Y-PCBA-Less) to be its framework,, the Y side can not supply static discharge owing to having the path, therefore, and can't be with electrostatic guide to the screw hole 8a ground connection that is reserved in X side printed circuit board (PCB) 2.Known LCD is avoided two of method that ESD takes place, system changes the cabling layout of entire product or add the circuit design of electrostatic discharge protective in original integrated circuit (IC) wafer, the degree of difficulty of this kind method in meeting increase design, note also the extra cost that adds the ESD protection circuit, the for example increase of the increase of layout area or manufacturing step, these all can cause extra cost burden.The accumulation of static and discharge to electronic component quality, characteristic or product yield, all seriously influence, in case display panels (panel) 10 has element injured by ESD, then this display panels 10 promptly can't use, and its loss can be quite serious.Therefore, how providing static one discharge path, can be effectively static is discharged and do not injure product, be that present industry is badly in need of the problem that solves.
[summary of the invention]
In view of this, the present invention is the electrostatic protection apparatus that proposes a kind of LCD.
One of purpose of the present invention, tie up to the electrostatic protection apparatus that a kind of LCD is provided, by multi-conducting section and most suspension joint lead-in wire is set on loading material (as membraneous material), so that static discharge path fast to be provided, can effectively avoid static to cause damage, also can significantly promote fine ratio of product by the electrode of drive integrated circult or panel inside.
One of purpose of the present invention, tie up to the electrostatic protection apparatus of the LCD that the one-sided printed circuit board (PCB) of a kind of tool is provided, when lacking Y side printed circuit board (PCB), electrostatic discharging path is set on the loading material that drive integrated circult sticked together, be electrically connected to X side printed circuit board (PCB), can reach the purpose of drive integrated circult end static discharge.
One of purpose of the present invention, tie up to the electrostatic discharge protection circuit that a kind of LCD is provided, by the transparency conductive electrode of panel, can replace flexible PCB connecting source electrode driven integrated circuit, grid-driving integrated circuit, but both can reduce cost, also shorten product sizes.
One of purpose of the present invention, tie up to the electrostatic discharge protection circuit that a kind of LCD is provided, by utilizing suspension joint pin existing on the loading material and panel interior oxidation indium tin electrode, connect most suspension joint lead-in wires and constitute a discharge path, can effectively electrostatic guide to printed circuit board (PCB) be discharged; Layout area can not increase, also need not increase extra cost.
A further object of the present invention, tie up to the electrostatic discharge protection circuit that a kind of LCD is provided, by design one positive supply and a negative supply on printed circuit board (PCB), the static rapid discharge path of the static and the negative charge of positive charge can be provided respectively, effectively prevent of the injury of positive and negative static discharge, and then promote the antistatic effect of liquid crystal display device module integral body LCD.
Embodiment provides a kind of electrostatic discharge protection circuit of LCD one of according to the present invention, it is to be included in most suspension joint lead-in wires of design and multi-conducting section on the loading material, wherein conductive section system is used for guiding static discharge to take place on conductive section, and is discharged on the printed circuit board (PCB) by the suspension joint lead-in wire.Complete discharge path system is made up of most suspension joint lead-in wires, multi-conducting section, most suspension joint pin and panel internal oxidation indium tin electrode, the characteristic of utilizing static to flow toward electronegative potential again by noble potential, in end earth terminal or positive-negative power end are set, respectively the static of positive charge or electrostatic guide to the relative path of negative charge are discharged.
Below cooperate appended graphic explanation in detail by specific embodiment, when the purpose that is easier to understand this creation, technology contents, characteristics and the effect reached thereof.
[description of drawings]
Fig. 1 is the panel of LCD configuration diagram of prior art.
Fig. 2 is the electrostatic discharge protection circuit synoptic diagram of one of the present invention embodiment.
Fig. 3 is the electrostatic discharge protection circuit synoptic diagram of another embodiment of the present invention.
[embodiment]
See also Fig. 2, be the electrostatic discharge protection circuit synoptic diagram of one of the present invention embodiment.(Y side Print Circuit Board AssemblyLess Y-PCBA-Less), designs an electrostatic protection apparatus to The present invention be directed to no Y side printed circuit board (PCB) liquid crystal display device module; As shown in the figure, in this embodiment, the grid-driving integrated circuit 34 of the source electrode driven integrated circuit 32 of the X side of display panels 30 and the Y side of display panels 30, system directly is attached to respectively on the loading material 36,40, and utilize most pins 26 to do functional the connection with display panels 30, and most source electrode driven integrated circuits 32 and most grid-driving integrated circuits 34 place the X side and the Y side of a display panels 30 respectively, by the transparency conductive electrode on the display panels 30, for example the ITO electrode transmits signal.The signal of self-driven integrated circuit is sent to display panels 30 in the future; Wherein, also there are most suspension joint pins 28 on this loading material 36,40, do extra function for the membrane transistor module and use.The packaged type of this kind drive integrated circult engages (Chip On Film for the crystal grain mantle; COF); be a kind of crystal grain or element are covered brilliant in flexible PCB (Flexible Print Circuit; FRC) or on the membraneous material (film), utilize the encapsulation technology of printed circuit board (PCB) for loading material in order to replacement.In this embodiment, more comprise one first suspension joint unit and one second suspension joint unit, wherein the first suspension joint unit lies in and suspension joint lead-in wire 42, its suspension joint 42 two ends that go between are set on the X side loading material 36 are formed by suspension joint pin 28; The second suspension joint unit lies in and suspension joint lead-in wire 42, its suspension joint 42 two ends that go between are set on the Y side loading material 40 are formed by suspension joint pin 28.Again, utilize the ITO electrode on the display panels 30, the first suspension joint unit and the second suspension joint unit are electrically connected, and form an effective electrostatic discharging path with X side printed circuit board (PCB) 22.
Then, on the suspension joint lead-in wire 42 of part, cover the anti-welding green lacquer (not shown) of last layer, in order to provide static one excellent discharge place, the part section of suspension joint lead-in wire 42 does not cover anti-welding green lacquer, make outside it is exposed to, to form most naked copper lead-in wires (being called conductive section 46), so that guiding static discharges on conductive section 46 at this; In addition, on X side printed circuit board (PCB) 22, increase by one group of electrostatic discharge (ESD) protection unit 62, system comprises a positive supply 48, a negative supply 50 and two diode 60a, 60b and is connected respectively to positive supply 48 and negative supply 50, the characteristic that setting by these two groups of power supplys and static are flowed toward electronegative potential by noble potential, the discharge path of the static of positively charged or negative charge can be provided respectively: when the electrostatic belt positive charge, static can pass through the first suspension joint unit,, ITO electrode, the second suspension joint unit, the first diode 60a and a positive supply 48 discharges; Anti-is as the same, and when the electrostatic belt negative charge, static can pass through the first suspension joint unit, ITO electrode, the second suspension joint unit, the second diode 60b and a negative supply 50 discharges; By this electrostatic discharge protection circuit, can pass through multi-conducting section 46, most suspension joint lead-in wire 42, most suspension joint pin 28, the rapid discharge of ITO electrode electrostatic discharge protective unit 62 to X side printed circuit board (PCB) 22 with the static of positive and negative electric charge; So, static promptly can not cause damage by the electrode in both sides drive integrated circult 32,34 or the display panels 30.
Fig. 3 is the electrostatic discharge protection circuit synoptic diagram of another embodiment of the present invention.It is to comprise the electrostatic discharge protection circuit framework of an embodiment and be arranged at one of X side printed circuit board (PCB) 22 electrostatic discharge protective unit 44, and it is an earth terminal.By this electrostatic discharge protection circuit, when static discharge during in conductive section 46, static can pass through the first suspension joint unit, the second suspension joint unit, ITO electrode, electrostatic discharge protective unit 44 snap-out release; In addition, recycling screw can reach the maximum effect of eliminating static discharge with X side printed circuit board (PCB) 22 by screw hole ground connection.
In this two embodiment, the packaged type of source electrode driven integrated circuit 32 and grid-driving integrated circuit 34, be not limited thereto COF crystal grain mantle joining technique shown among two embodiment, also can adopt glass flip chip to engage (Chip On Glass, COG) or coil type chip carrier encapsulation (Tape CarrierPackage, TCP) etc.Therefore, loading material will be along with the packaged type difference of drive integrated circult, and changes to some extent: as film, glass or flexible printed circuit board (Flexible Print Circuit, FPC) etc.In addition, conductive section 46 set position, quantity, shape, size on suspension joint lead-in wire 42 also is not limited to shown in this embodiment; That the shape of conductive section 46 can be designed to is square, triangle, circle, ellipse, polygon, strip or have the shape of multi-radian; The position of conductive section 46, quantity, shape, size can be according to the different arrangement modes of drive integrated circult inner member, and different variations is arranged.
Comprehensively above-mentioned, one of the present invention embodiment system is provided with most suspension joint lead-in wires by utilizing on loading material, connect the Y side loading material existing suspension joint pin in two ends up and down, utilize one of display panels inside ITO electrode again, electrically connect adjacent grid-driving integrated circuit, and, be electrically connected to X side printed circuit board (PCB) by the suspension joint pin on ITO electrode one of on the display panels and the X side loading material, form an effective electrostatic discharging path.Because, this electrostatic discharge protection circuit provides the setting of conductive section, guiding static discharges on conductive section and passes through discharge path of the present invention, can effectively prevent and treat electrostatic breakdown LCD inner member and panel, promote the whole anlistatig ability of liquid crystal display device module, produce yield and can significantly rise.In addition, utilize directly drive integrated circult is attached to loading material on, and engage with display panels, omit the use of Y side printed circuit board (PCB), can save the cost and the space of Y side printed circuit board (PCB), make and not only can save production cost, also can lock the volume size of little LCD, increase product competitiveness.
Above-described embodiment only is explanation technological thought of the present invention and characteristics, its purpose makes the personage who has the knack of this skill can understand content of the present invention and is implementing according to this, when can not with qualification claim of the present invention, promptly the equalization of doing according to disclosed spirit generally changes or modifies, and must be encompassed in the claim of the present invention.
Claims (9)
1. the electrostatic discharge protection circuit of a LCD comprises:
One first suspension joint unit;
One second suspension joint unit, wherein this first suspension joint unit and this second suspension joint unit are arranged at the adjacent both sides of this panel respectively, and this panel electrically connects this first suspension joint unit and this second suspension joint unit; And
One electrostatic discharge (ESD) protection unit is connected to this first suspension joint unit.
2. the electrostatic discharge protection circuit of LCD according to claim 1 is characterized in that, this electrostatic discharge (ESD) protection unit comprises:
One positive supply;
One negative supply; And
Two diodes are between this positive supply and this negative supply, and wherein this first suspension joint unit is connected between this two diode.
3. the electrostatic discharge protection circuit of the display panels of the one-sided printed circuit board (PCB) of tool according to claim 1 is characterized in that, this electrostatic discharge (ESD) protection unit comprises a ground wire.
4. the electrostatic discharge protection circuit of LCD according to claim 1 is characterized in that, this first suspension joint unit comprises the pin at suspension joint lead-in wire and its two ends, and this suspension joint lead-in wire has outside a conductive section is exposed to.
5. the electrostatic discharge protection circuit of LCD according to claim 1 is characterized in that, this second suspension joint unit comprises the pin at suspension joint lead-in wire and its two ends, and this suspension joint lead-in wire has outside a conductive section is exposed to.
6. the electrostatic discharge protection circuit of LCD according to claim 1 is characterized in that, this electrostatic discharge (ESD) protection unit is arranged on the printed circuit board (PCB).
7. the electrostatic discharge protection circuit of LCD according to claim 1 is characterized in that, this first suspension joint unit and this second suspension joint unit are arranged at respectively to have on one of the most drive integrated circult elements loading material.
8. the electrostatic discharge protection circuit of LCD according to claim 7 is characterized in that, this loading material is film, glass or flexible printed circuit board.
9. the electrostatic discharge protection circuit of LCD according to claim 1 is characterized in that, this panel comprises a transparency conductive electrode and electrically connects this first suspension joint unit and this second suspension joint unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610095911 CN101093297A (en) | 2006-06-23 | 2006-06-23 | Electrostatic protection circuit for liquid crystal display |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610095911 CN101093297A (en) | 2006-06-23 | 2006-06-23 | Electrostatic protection circuit for liquid crystal display |
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| Publication Number | Publication Date |
|---|---|
| CN101093297A true CN101093297A (en) | 2007-12-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200610095911 Pending CN101093297A (en) | 2006-06-23 | 2006-06-23 | Electrostatic protection circuit for liquid crystal display |
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| CN (1) | CN101093297A (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101630078B (en) * | 2008-07-17 | 2010-12-15 | 胜华科技股份有限公司 | Liquid crystal display panel |
| CN102655148A (en) * | 2012-03-20 | 2012-09-05 | 京东方科技集团股份有限公司 | Thin film transistor (TFT) substrate, preparation method of TFT substrate, liquid crystal display (LCD) device and electronic paper display device |
| CN101625462B (en) * | 2008-07-07 | 2012-09-05 | 奇美电子股份有限公司 | Liquid crystal display module and liquid crystal display |
| CN105607320A (en) * | 2016-03-10 | 2016-05-25 | 深圳市华星光电技术有限公司 | Liquid crystal display device |
| CN106371658A (en) * | 2016-06-24 | 2017-02-01 | 友达光电股份有限公司 | Panel board |
| CN109212855A (en) * | 2018-10-11 | 2019-01-15 | 深圳市华星光电技术有限公司 | A kind of Wiring structure and liquid crystal display panel |
| CN109270733A (en) * | 2018-11-13 | 2019-01-25 | 成都中电熊猫显示科技有限公司 | A kind of display panel, array substrate and display device |
| US20220179267A1 (en) * | 2020-12-03 | 2022-06-09 | Chongqing Boe Optoelectronics Technology Co., Ltd. | Display Unit and Display Apparatus |
-
2006
- 2006-06-23 CN CN 200610095911 patent/CN101093297A/en active Pending
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101625462B (en) * | 2008-07-07 | 2012-09-05 | 奇美电子股份有限公司 | Liquid crystal display module and liquid crystal display |
| CN101630078B (en) * | 2008-07-17 | 2010-12-15 | 胜华科技股份有限公司 | Liquid crystal display panel |
| CN102655148A (en) * | 2012-03-20 | 2012-09-05 | 京东方科技集团股份有限公司 | Thin film transistor (TFT) substrate, preparation method of TFT substrate, liquid crystal display (LCD) device and electronic paper display device |
| WO2013139158A1 (en) * | 2012-03-20 | 2013-09-26 | 京东方科技集团股份有限公司 | Thin film transistor array substrate, method of manufacturing same and display device |
| US8963160B2 (en) | 2012-03-20 | 2015-02-24 | Boe Technology Group Co., Ltd | Thin film transistor array substrate, manufacturing method thereof and display device |
| WO2017152459A1 (en) * | 2016-03-10 | 2017-09-14 | 深圳市华星光电技术有限公司 | Liquid crystal display apparatus |
| CN105607320A (en) * | 2016-03-10 | 2016-05-25 | 深圳市华星光电技术有限公司 | Liquid crystal display device |
| CN106371658A (en) * | 2016-06-24 | 2017-02-01 | 友达光电股份有限公司 | Panel board |
| CN109212855A (en) * | 2018-10-11 | 2019-01-15 | 深圳市华星光电技术有限公司 | A kind of Wiring structure and liquid crystal display panel |
| CN109270733A (en) * | 2018-11-13 | 2019-01-25 | 成都中电熊猫显示科技有限公司 | A kind of display panel, array substrate and display device |
| CN109270733B (en) * | 2018-11-13 | 2022-11-08 | 成都中电熊猫显示科技有限公司 | Display panel, array substrate and display device |
| US20220179267A1 (en) * | 2020-12-03 | 2022-06-09 | Chongqing Boe Optoelectronics Technology Co., Ltd. | Display Unit and Display Apparatus |
| US11846853B2 (en) * | 2020-12-03 | 2023-12-19 | Chongqing Boe Optoelectronics Technology Co., Ltd. | Display unit and display apparatus |
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