CN110491874A - Electrostatic discharge protective circuit and panel - Google Patents
Electrostatic discharge protective circuit and panel Download PDFInfo
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- CN110491874A CN110491874A CN201910779077.6A CN201910779077A CN110491874A CN 110491874 A CN110491874 A CN 110491874A CN 201910779077 A CN201910779077 A CN 201910779077A CN 110491874 A CN110491874 A CN 110491874A
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- discharge protective
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L27/00—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate
- H01L27/02—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having at least one potential-jump barrier or surface barrier; including integrated passive circuit elements with at least one potential-jump barrier or surface barrier
- H01L27/0203—Particular design considerations for integrated circuits
- H01L27/0248—Particular design considerations for integrated circuits for electrical or thermal protection, e.g. electrostatic discharge [ESD] protection
- H01L27/0251—Particular design considerations for integrated circuits for electrical or thermal protection, e.g. electrostatic discharge [ESD] protection for MOS devices
- H01L27/0266—Particular design considerations for integrated circuits for electrical or thermal protection, e.g. electrostatic discharge [ESD] protection for MOS devices using field effect transistors as protective elements
- H01L27/027—Particular design considerations for integrated circuits for electrical or thermal protection, e.g. electrostatic discharge [ESD] protection for MOS devices using field effect transistors as protective elements specially adapted to provide an electrical current path other than the field effect induced current path
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- Condensed Matter Physics & Semiconductors (AREA)
- General Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Semiconductor Integrated Circuits (AREA)
Abstract
The invention discloses a kind of electrostatic discharge protective circuit and panels, to solve the problems, such as that electrostatic discharge protective circuit reliability is lower in the related technology.Electrostatic discharge protective circuit includes: the first Electro-static Driven Comb circuit and the second Electro-static Driven Comb circuit; first Electro-static Driven Comb circuit and second Electro-static Driven Comb circuit are respectively used to discharge from the electrostatic charge of the electrostatic discharge protective circuit first end to the second end of the electrostatic discharge protective circuit, and second Electro-static Driven Comb circuit the first Electro-static Driven Comb loop-delay discharges the electrostatic charge.After the electrostatic discharge protective circuit melts and ruins in the first Electro-static Driven Comb circuit, the second Electro-static Driven Comb circuit can still be worked normally, and improve the reliability of electrostatic discharge protective circuit.
Description
Technical field
The present invention relates to technical field of semiconductors, a kind of electrostatic discharge protective circuit and panel are particularly related to.
Background technique
In art production process, friction will lead to array substrate with electrostatic.Its mechanism is that have different electrostatic charged
The object of position due to directly contact or electrostatic induction caused by between object electrostatic charge transfer.ESD(Electro-
Static Discharge, Electro-static Driven Comb) be often referred to after the energy of electrostatic field reaches a certain level, breakdown therebetween medium and
The phenomenon that being discharged.ESD can damage the interface device being attached thereto under normal circumstances, another situation is that rushing by ESD
Device after hitting may not damage immediately, but performance decline causes product to break down too early.At present in production, generally adopt
Reduce electrostatic breakdown with the mode in addition Electro-static Driven Comb circuit.But currently used Electro-static Driven Comb circuit, once electric current is excessive,
It will cause Electro-static Driven Comb circuit and melted and ruined, when secondary ESD occurs for same location, can not just protect connected interface device, it can
It is lower by property.
Summary of the invention
In view of this, it is an object of the invention to propose a kind of electrostatic discharge protective circuit and panel, to solve the relevant technologies
In, the lower problem of Electro-static Driven Comb circuit reliability.
According to the first aspect of the invention, provide a kind of electrostatic discharge protective circuit, comprising: the first Electro-static Driven Comb circuit with
And the second Electro-static Driven Comb circuit, first Electro-static Driven Comb circuit and second Electro-static Driven Comb circuit are respectively used to come from
The electrostatic charge of the electrostatic discharge protective circuit first end is discharged to the second end of the electrostatic discharge protective circuit, and second electrostatic is released
It puts back to road the first Electro-static Driven Comb loop-delay and discharges the electrostatic charge.
Optionally, first Electro-static Driven Comb circuit includes first switching element, the first switching element with it is described quiet
The first end of electric protection circuit is connected, and the first switching element is used to be greater than the first switch when the voltage of the first end
It is connected when the cut-in voltage of element, the electrostatic charge from the first end is discharged to the second of the electrostatic discharge protective circuit
End；Second Electro-static Driven Comb circuit includes that second switch element and the first delay being connected with the second switch element are released
Electric discharge road, the second switch element are used for when the voltage of the first end is greater than the cut-in voltage of the second switch element
Conducting, the first sustained release circuit is for absorbing the electrostatic charge from the electrostatic discharge protective circuit first end, so that institute
State the second Electro-static Driven Comb circuit the first Electro-static Driven Comb loop-delay discharge electrostatic charges.
Optionally, the first sustained release circuit includes third switch unit and first capacitor, the third switch
First pole of the control electrode of unit and the second switch control unit, the second pole of the third switch unit and described the
One end of one capacitor is connected, and the first pole of the third switch unit and the other end of the first capacitor and the electrostatic are protected
The second end of protection circuit is connected.
Optionally, the control electrode of the first switch unit and the first end phase of the second pole and the electrostatic discharge protective circuit
Even, the first pole of the first switch unit is connected with the second end of the electrostatic discharge protective circuit.
Optionally, the control electrode of the second switch unit and the first end phase of the first pole and the electrostatic discharge protective circuit
Even, the first pole of the second switch unit is connected with the first sustained release circuit, the first sustained release circuit and
The second end of the electrostatic discharge protective circuit is connected.
Optionally, the electrostatic discharge protective circuit further include: reversed Electro-static Driven Comb circuit, for discharging by the electrostatic protection
The second end of circuit flows to the electrostatic charge of the first end of the electrostatic discharge protective circuit.
Optionally, the reversed Electro-static Driven Comb circuit, comprising: the reversed Electro-static Driven Comb circuit of the first son, first son are anti-
It include: the 4th switch element to Electro-static Driven Comb circuit, the control electrode of the 4th switch element and the second pole and the electrostatic
The second end of circuit is protected to be connected, the first pole of the 4th switch element is connected with the first end of the electrostatic discharge protective circuit.
Optionally, the reversed Electro-static Driven Comb circuit further include: the reversed Electro-static Driven Comb circuit of the second son, second son are anti-
It include: the 5th switch element to Electro-static Driven Comb circuit, the second pole of the 5th switch element and control electrode and the electrostatic
The second end of circuit is protected to be connected, the first pole of the 5th switch element is connected with the first end of the electrostatic discharge protective circuit.
Optionally, the reversed Electro-static Driven Comb circuit of the second son further include: the second sustained release circuit, second delay
One end of release circuit is connected with the first end of the electrostatic discharge protective circuit, the other end of the second sustained release circuit and institute
State the 5th switch element first is extremely connected, and the second sustained release circuit is for returning the reversed Electro-static Driven Comb of the second son
The road reversed Electro-static Driven Comb loop-delay discharge electrostatic charges of the first son.
Optionally, the second sustained release circuit includes the 6th switch unit and the second capacitor, the 6th switch
One end of the control electrode of unit and second capacitor, the second pole of the 6th switch unit and the 5th switch unit
First be extremely connected, the first pole of the 6th switch unit and the other end of second capacitor and electrostatic protection electricity
The first end on road is connected.
According to the second aspect of the invention, a kind of panel is provided, comprising: appointing as described in first aspect of the present invention
It anticipates a kind of electrostatic discharge protective circuit.
From the above it can be seen that electrostatic discharge protective circuit provided by the invention, have the first Electro-static Driven Comb circuit and
With the second Electro-static Driven Comb circuit for delaying release electrostatic, since the second Electro-static Driven Comb circuit is compared with the first Electro-static Driven Comb loop-delay
Release electrostatic, even if electrostatic ring, Electro-static Driven Comb occurring and in the case where excessive electric current, the first Electro-static Driven Comb circuit can be prior to
Second Electro-static Driven Comb circuit, which is melted, to be ruined, and the second Electro-static Driven Comb circuit remains to effectively work, and improves the reliable of Electro-static Driven Comb circuit
Property.
Detailed description of the invention
In order to illustrate the technical solution of the embodiments of the present invention more clearly, the attached drawing to embodiment is simply situated between below
It continues, it should be apparent that, the accompanying drawings in the following description merely relates to some embodiments of the present invention, rather than limitation of the present invention.
Fig. 1 is a kind of schematic diagram of electrostatic discharge protective circuit shown according to an exemplary embodiment；
Fig. 2 is a kind of schematic diagram of electrostatic discharge protective circuit shown according to an exemplary embodiment；
Fig. 3 is a kind of schematic diagram of electrostatic discharge protective circuit shown according to an exemplary embodiment.
Specific embodiment
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
Attached drawing, the technical solution of the embodiment of the present invention is clearly and completely described.Obviously, described embodiment is this hair
Bright a part of the embodiment, instead of all the embodiments.Based on described the embodiment of the present invention, ordinary skill
Personnel's every other embodiment obtained under the premise of being not necessarily to creative work, shall fall within the protection scope of the present invention.
Unless otherwise defined, the technical term or scientific term that the disclosure uses should be tool in fields of the present invention
The ordinary meaning for thering is the personage of general technical ability to be understood." first ", " second " used in the disclosure and similar word are simultaneously
Any sequence, quantity or importance are not indicated, and are used only to distinguish different component parts.Equally, "one", " one " or
The similar word such as person's "the" does not indicate that quantity limits yet, but indicates that there are at least one." comprising " or "comprising" etc. are similar
Word mean to occur element or object before the word cover the element for appearing in the word presented hereinafter or object and its
It is equivalent, and it is not excluded for other elements or object.The similar word such as " connection " or " connected " be not limited to physics or
The connection of person's machinery, but may include electrical connection, it is either direct or indirect."upper", "lower", " left side ",
" right side " etc. is only used for indicating relative positional relationship, after the absolute position for being described object changes, then the relative positional relationship
May correspondingly it change.
Fig. 1 is a kind of schematic diagram of electrostatic discharge protective circuit shown according to an exemplary embodiment, as shown in Figure 1, the electricity
Road includes:
First Electro-static Driven Comb circuit 11 is (as shown in Figure 1, it may include pass through the first electrostatic by electrostatic discharge protective circuit first end S1
Releasing loop is to the circuit of electrostatic discharge protective circuit second end S2) and the second Electro-static Driven Comb circuit 12 (as shown in Figure 1, it may include
Second Electro-static Driven Comb circuit to the circuit of electrostatic discharge protective circuit second end S2 is passed through by electrostatic discharge protective circuit first end S1), it is described
First Electro-static Driven Comb circuit S1 and the second Electro-static Driven Comb circuit 12 are respectively used to will be from electrostatic discharge protective circuit first end S1's
Electrostatic charge is discharged to the second end S2 of electrostatic discharge protective circuit, 12 first Electro-static Driven Comb circuit of the second Electro-static Driven Comb circuit
Electrostatic charge described in 11 sustained releases, wherein the flow direction of the expression of direction indicated by arrow shown in FIG. 1 electrostatic charge.
The electrostatic discharge protective circuit of the embodiment of the present invention, with the first Electro-static Driven Comb circuit and with delaying release electrostatic
Second Electro-static Driven Comb circuit, since the second Electro-static Driven Comb circuit is compared with the first Electro-static Driven Comb loop-delay release electrostatic, even if electrostatic
For ring in the case where Electro-static Driven Comb and excessive electric current occurs, the first Electro-static Driven Comb circuit can be prior to the second Electro-static Driven Comb circuit quilt
Melt and ruin, the second Electro-static Driven Comb circuit remains to effectively work, and improves the reliability of electrostatic discharge protective circuit.
Fig. 2 is a kind of schematic diagram of electrostatic discharge protective circuit shown according to an exemplary embodiment, as shown in Fig. 2, the electricity
Road includes:
First Electro-static Driven Comb circuit and the second Electro-static Driven Comb circuit；
First Electro-static Driven Comb circuit includes first switching element M1, and the first of first switching element M1 and electrostatic discharge protective circuit
End is connected, which for example can be the end data line (Data Line), and first switching element M1 is used for the electricity when first end
Pressure is connected when for example, the voltage of A node being greater than the cut-in voltage of first switching element M1 as shown in Figure 2, will come from quiet
The electrostatic charge of electric protection circuit first end is discharged to the second end of electrostatic discharge protective circuit, which for example can be serial logical
It interrogates port bus (Com Bus Line)；
Second Electro-static Driven Comb circuit includes second switch element M2 and the first delay being connected with second switch element M2
Release circuit 21 (part as shown in dotted line frame in Fig. 2), second switch element M2 are used for first when electrostatic discharge protective circuit
The voltage at end, such as be connected when the voltage of node A shown in Fig. 2 is greater than the cut-in voltage of second switch element M2, first
Sustained release circuit 21 is for making the second Electro-static Driven Comb circuit compared with the first Electro-static Driven Comb loop-delay discharge electrostatic charges.
In a kind of achievable mode, the first sustained release circuit 21 may include third switch unit M3 and first capacitor
The control electrode of C0, third switch unit M3 and the first pole of second switch control unit M2, the second pole of third switch unit M3
And one end of first capacitor C0 is connected, the first pole of third switch unit M3 and the other end of first capacitor C0 and electrostatic are protected
The second end of protection circuit is connected, and the first capacitor in the first sustained release circuit 21 can be consumed from electrostatic discharge protective circuit
The partial electrostatic charge of first end, plays the role of buffering to Electro-static Driven Comb, so that the release of the second Electro-static Driven Comb circuit is quiet
The speed of electricity is slower than the first Electro-static Driven Comb circuit.Still by taking electrostatic discharge protective circuit shown in Fig. 2 as an example, when the of electrostatic discharge protective circuit
One end suddenly by an electrostatic high-pressure when, M1 and M2 are opened, and the first Electro-static Driven Comb circuit is imported electrostatic charge by M1
The second end of electrostatic discharge protective circuit；In the second Electro-static Driven Comb circuit, due to capacitor C0's (for an example of first capacitor)
In the presence of having certain buffer function to electrostatic charge, so the second electrostatic is released in the electrostatic discharge protective circuit of the embodiment of the present invention
Putting back to road is secondary Electro-static Driven Comb circuit, and the first Electro-static Driven Comb circuit can be melted prior to the second Electro-static Driven Comb circuit to be ruined, and
First Electro-static Driven Comb circuit is melted ruin after, the second Electro-static Driven Comb circuit can still work normally, and improve electrostatic discharge protective circuit can
By property.
In a kind of achievable mode, in the first Electro-static Driven Comb circuit, the control electrode of first switch unit M1 and
Two poles are connected with the first end of electrostatic discharge protective circuit, the first pole of first switch unit M1 and the second end phase of electrostatic discharge protective circuit
Even.Still by taking electrostatic discharge protective circuit shown in Fig. 2 as an example, when the first end of electrostatic discharge protective circuit is suddenly by an electrostatic high-pressure
When, node A is high level H, which is applied to the control electrode of M1 and M2, so that M1, M2 are opened；Node B is also simultaneously
High level H, by the unlatching of M1 and M2, by high level input node G and node C；The electrostatic charge of node G flows directly into section
Point F, and then the second end of electrostatic discharge protective circuit is flowed to, the first Electro-static Driven Comb circuit release electrostatic process terminates.
In a kind of achievable mode, in the second Electro-static Driven Comb circuit, the control electrode of second switch unit M2 and
One pole is connected with the first end of electrostatic discharge protective circuit, and the first pole of second switch unit M2 is connected with the first sustained release circuit
11, the first sustained release circuit 11 is connected with the second end of electrostatic discharge protective circuit, is still with electrostatic discharge protective circuit shown in Fig. 2
Example, a part of flow of charge capacitor C0 of the electrostatic charge of node C give capacitor charging, and another part is applied to the control electrode of M3, makes
M3 is opened, and electrostatic charge is flowed to node E by M3, and then flow to the second end of electrostatic discharge protective circuit, the second Electro-static Driven Comb
Circuit release electrostatic process terminates.In this process, since capacitor C0 consumes Partial charge, the second Electro-static Driven Comb circuit is risen
To the effect of buffering, so that the speed of the second Electro-static Driven Comb circuit release electrostatic is slower than the first Electro-static Driven Comb circuit, if thus sending out
Raw melt ruins, and the first Electro-static Driven Comb circuit can be melted prior to the second Electro-static Driven Comb circuit to be ruined.
In a kind of achievable mode, electrostatic discharge protective circuit may also include that reversed Electro-static Driven Comb circuit, for discharging by quiet
The second end of electric protection circuit flows to the electrostatic charge of the first end of electrostatic discharge protective circuit, still with electrostatic protection electricity shown in Fig. 2
For road, which can will for example discharge from the electrostatic charge at the end Com Bus Line to Data
The end Line.
Fig. 3 is a kind of schematic diagram of electrostatic discharge protective circuit shown according to an exemplary embodiment, as shown in figure 3, reversely
Electro-static Driven Comb circuit can include: the first reversed Electro-static Driven Comb circuit of son, the reversed Electro-static Driven Comb circuit of the first son include: the 4th to open
Element M4 is closed, the control electrode of the 4th switch element M4 and the second pole are connected with the second end of electrostatic discharge protective circuit, the 4th switch
The first pole of element M4 is connected with the first end of electrostatic discharge protective circuit.As shown in figure 3, being flowed in electrostatic charge by Com Bus Line
When to the direction Line Data, for Com Bus Line suddenly by an electrostatic high-pressure, node F is high level H, at the node
Electrostatic charge flows to node G and node E；The high level H of node G is applied in the control electrode of the 4th switch element M4, opens M4
It opens, the electrostatic charge of node F flows to node H by M4, and then flows to Data Line, and the reversed Electro-static Driven Comb circuit of the first son is quiet
Electric release process terminates.
In a kind of achievable mode, as shown in figure 3, reversed Electro-static Driven Comb circuit may also include that the second reversed electrostatic of son
Releasing loop, the reversed Electro-static Driven Comb circuit of the second son can include: the 5th switch element M5, the second pole of the 5th switch element M5
And control electrode is connected with the second end of electrostatic discharge protective circuit, the of the first pole of the 5th switch element M5 and electrostatic discharge protective circuit
One end is connected.
In a kind of achievable mode, as shown in figure 3, the reversed Electro-static Driven Comb circuit of the second son may also include that the second delay
One end of release circuit 22, the second sustained release circuit 22 is connected with the first end of electrostatic discharge protective circuit, the second sustained release electricity
The other end on road 22 is extremely connected with the first of the 5th switch element M5, and the second sustained release circuit 22 is for keeping the second son reversed quiet
Electric Releasing loop is compared with the reversed Electro-static Driven Comb loop-delay discharge electrostatic charges of the first son.
In a kind of achievable mode, as shown in figure 3, the second sustained release circuit may include the 6th switch unit M6 and
One end of second capacitor C1, the control electrode of the 6th switch unit M6 and the second capacitor C1, the 6th switch unit M6 the second pole with
And the 5th switch unit M5 first be extremely connected, the other end of the first pole of the 6th switch unit M6 and the second capacitor C1 and quiet
The first end of electric protection circuit is connected.Still by taking electrostatic discharge protective circuit shown in Fig. 3 as an example, the high level H of node E is applied to M4's
In control electrode, open M4, the electrostatic charge of node F flows to node D by M4；It is high level at node D, it is quiet at the node
On the one hand charge flows to capacitor C1, charge for capacitor C1, and the flat control electrode for being applied to M6 of the high point at the node opens M6
It opens, and electrostatic charge is flowed to by node H by M6, and then flow to Data Line, the second Electro-static Driven Comb circuit release electrostatic process
Terminate.Since capacitor C1 consumes Partial charge, play the role of buffering to Electro-static Driven Comb, so that the second reversed Electro-static Driven Comb of son
The speed of circuit release electrostatic is slower than compared with the reversed Electro-static Driven Comb circuit of the first son.It is ruined if thus melting, the first reversed electrostatic of son
Releasing loop can be melted prior to the reversed Electro-static Driven Comb circuit of the second son to be ruined.That is, as the M4 in the reversed Electro-static Driven Comb circuit of the first son
Melt when ruining, the reversed Electro-static Driven Comb circuit of the second son still can work normally.
The electrostatic discharge protective circuit of the embodiment of the present invention includes two-way Electro-static Driven Comb circuit, wherein the second Electro-static Driven Comb circuit can
Compared with the first Electro-static Driven Comb loop-delay release electrostatic, in this two-way Electro-static Driven Comb circuit, electrostatic preferentially passes through the first Electro-static Driven Comb
Circuit release, when the input terminal (such as above-mentioned first end or second end) of electrostatic discharge protective circuit is when by unexpected electrostatic high-pressure,
First Electro-static Driven Comb circuit, which can preferentially melt, to be ruined, and after the first Electro-static Driven Comb circuit, which is melted, to be ruined, the second Electro-static Driven Comb circuit still can
It works normally, achievees the purpose that secondary electrostatic protection.Meanwhile in the normal use process of panel, panel is met with more than twice
The probability of ESD is lower, thus meets practical life enough using the panel with two Electro-static Driven Comb circuits of the embodiment of the present invention
The requirement of electrostatic protection, reliability are higher in production.
The embodiment of the invention also provides a kind of panel, the panel such as display panel, which may include of the invention real
Any one of the above electrostatic discharge protective circuit of example offer is provided.
It should be noted that the switch element in the various embodiments described above can be transistor, which can be independently selected from
One of polycrystalline SiTFT, amorphous silicon film transistor, oxide thin film transistor and Organic Thin Film Transistors,
Such as it can be TFT (Thin Film Transistor, thin film transistor (TFT))." control electrode " tool being related in the present embodiment
Body can refer to the grid or base stage of transistor, and " the first pole " can specifically refer to the source electrode or emitter of transistor, accordingly
" the second pole " can specifically refer to drain electrode or the collector of transistor.
In addition, first switching element M1, second switch element M2, third switch element M3, the 4th in above-described embodiment
Switch element M4, the 5th switch element M5 and the 6th switch element M6 are N-type transistor, are convenient to carry out in the present embodiment
A kind of preferred embodiment will not generate limitation to technical solution of the present invention.Those skilled in the art are it should also be understood that simple
The type (N-type or p-type) to each transistor be changed, and to the positive and negative of each power end and control signal wire output voltage
Polarity is changed, and executes the technical solution that identical on or off operates to each transistor with the present embodiment to realize,
It belongs to the application protection scope.Concrete condition no longer illustrates one by one herein.
The transistor used in all embodiments of the invention all can be thin film transistor (TFT) or field-effect tube or other characteristics
Identical device.In embodiments of the present invention, the two poles of the earth for differentiation transistor in addition to grid, wherein will be known as source electrode in a pole,
Another pole is known as draining.In addition, transistor can be divided into N-type transistor or P-type transistor by the characteristic differentiation according to transistor.
In driving circuit provided in an embodiment of the present invention, all transistors are illustrated by taking N-type transistor as an example, it is contemplated that
Be using P-type transistor realize when be that those skilled in the art can readily occur in without creative efforts
, therefore be also in the embodiment of the present invention protection scope.
In embodiments of the present invention, for N-type transistor, the first extremely source electrode, second extremely drains, for P-type crystal
Pipe, first extremely drains, the second extremely source electrode.
It should be noted that display device in the present embodiment can be with are as follows: Electronic Paper, mobile phone, tablet computer, television set,
Any products or components having a display function such as laptop, Digital Frame, navigator.
The technical scheme of the present invention has been explained in detail above with reference to the attached drawings, it is contemplated that in the prior art, source-drain electrode and active
Layer is in different layers, so that substrate thickness is larger, complex manufacturing technology.It, can be by nitrogen by the technical solution of the application
Change copper and be doped processing, within the same layer by the preparation of source electrode, drain electrode, data line and active layer, to reduce array substrate
Thickness simplifies the manufacture craft of array substrate.
It should be pointed out that in the accompanying drawings, for the size that clearly may be exaggerated layer and region of diagram.And it can be with
Understand, when element or layer be referred in another element or layer "upper", it can be directly in other elements, or may exist
Intermediate layer.Additionally, it is appreciated that it can be directly at other when element or layer be referred in another element or layer "lower"
Under element, or there may be the layer of more than one centre or elements.In addition, it is to be appreciated that when layer or element are referred to as
Two layers or two elements " between " when, the layer that it can be only between two layers or two elements, or there may also be one
Above middle layer or element.Similar reference marker indicates similar element in the whole text.
In the present invention, term " first ", " second ", " third ", " the 4th " are used for description purposes only, and should not be understood as
Indication or suggestion relative importance.Term " multiple " refers to two or more, unless otherwise restricted clearly.
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, for the skill of this field
For art personnel, the invention may be variously modified and varied.All within the spirits and principles of the present invention, made any to repair
Change, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
It should be understood by those ordinary skilled in the art that: the above is only a specific embodiment of the present invention, and
It is not used in the limitation present invention, all within the spirits and principles of the present invention, any modification, equivalent substitution, improvement and etc. done,
It should be included within protection scope of the present invention.
Claims (11)
1. a kind of electrostatic discharge protective circuit characterized by comprising
First Electro-static Driven Comb circuit and the second Electro-static Driven Comb circuit, first Electro-static Driven Comb circuit and second electrostatic
Releasing loop is respectively used to discharge from the electrostatic charge of the electrostatic discharge protective circuit first end to the electrostatic discharge protective circuit
Second end, second Electro-static Driven Comb circuit the first Electro-static Driven Comb loop-delay discharges the electrostatic charge.
2. electrostatic discharge protective circuit according to claim 1, which is characterized in that first Electro-static Driven Comb circuit includes first
Switch element, the first switching element are connected with the first end of the electrostatic discharge protective circuit, and the first switching element is used for
It is connected when the voltage of the first end is greater than the cut-in voltage of the first switching element, it will be from the quiet of the first end
Charge is discharged to the second end of the electrostatic discharge protective circuit；
Second Electro-static Driven Comb circuit includes second switch element and the first delay being connected with the second switch element
Release circuit, the second switch element are used to be greater than the cut-in voltage of the second switch element when the voltage of the first end
When be connected, the first sustained release circuit for absorbing the electrostatic charge from the electrostatic discharge protective circuit first end so that
Second Electro-static Driven Comb circuit the first Electro-static Driven Comb loop-delay discharge electrostatic charges.
3. electrostatic discharge protective circuit according to claim 2, which is characterized in that the first sustained release circuit includes third
First pole of switch unit and first capacitor, the control electrode of the third switch unit and the second switch control unit,
Second pole of the third switch unit and one end of the first capacitor are connected, the first pole of the third switch unit with
The second end of the other end of the first capacitor and the electrostatic discharge protective circuit is connected.
4. electrostatic discharge protective circuit according to claim 2, which is characterized in that the control electrode of the first switch unit and
Second pole is connected with the first end of the electrostatic discharge protective circuit, the first pole of the first switch unit and electrostatic protection electricity
The second end on road is connected.
5. electrostatic discharge protective circuit according to claim 2, which is characterized in that the control electrode of the second switch unit and
First pole is connected with the first end of the electrostatic discharge protective circuit, and the first pole of the second switch unit is released with first delay
Discharging, road is connected, and the first sustained release circuit is connected with the second end of the electrostatic discharge protective circuit.
6. electrostatic discharge protective circuit according to claim 2, which is characterized in that the electrostatic discharge protective circuit further include:
Reversed Electro-static Driven Comb circuit, flows to the electrostatic discharge protective circuit by the second end of the electrostatic discharge protective circuit for discharging
The electrostatic charge of first end.
7. electrostatic discharge protective circuit according to claim 6, which is characterized in that the reversed Electro-static Driven Comb circuit, comprising:
The first reversed Electro-static Driven Comb circuit of son, the reversed Electro-static Driven Comb circuit of the first son includes: the 4th switch element, and described the
The control electrode of four switch elements and the second pole are connected with the second end of the electrostatic discharge protective circuit, the 4th switch element
First pole is connected with the first end of the electrostatic discharge protective circuit.
8. electrostatic discharge protective circuit according to claim 7, which is characterized in that the reversed Electro-static Driven Comb circuit further include:
The second reversed Electro-static Driven Comb circuit of son, the reversed Electro-static Driven Comb circuit of the second son includes: the 5th switch element, and described the
Second pole of five switch elements and control electrode are connected with the second end of the electrostatic discharge protective circuit, the 5th switch element
First pole is connected with the first end of the electrostatic discharge protective circuit.
9. electrostatic discharge protective circuit according to claim 8, which is characterized in that the reversed Electro-static Driven Comb circuit of the second son is also
Include:
Second sustained release circuit, one end of the second sustained release circuit and the first end phase of the electrostatic discharge protective circuit
Even, the other end of the second sustained release circuit is extremely connected with the first of the 5th switch element, and second delay is released
Electric discharge road is quiet for making the reversed Electro-static Driven Comb loop-delay release of the reversed Electro-static Driven Comb circuit of the second son first son
Charge.
10. electrostatic discharge protective circuit according to claim 9, which is characterized in that the second sustained release circuit includes the
One end of six switch units and the second capacitor, the control electrode of the 6th switch unit and second capacitor, the described 6th
First extremely connected, the first pole of the 6th switch unit and institute of the second pole of switch unit and the 5th switch unit
The first end of the other end and the electrostatic discharge protective circuit of stating the second capacitor is connected.
11. a kind of panel characterized by comprising
Electrostatic discharge protective circuit as described in claims 1 to 10 any one.
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| CN110491874B (en) | 2022-08-05 |
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