CN105609138A - Shifting register, gate driving circuit, display panel and display device - Google Patents
Shifting register, gate driving circuit, display panel and display device Download PDFInfo
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- CN105609138A CN105609138A CN201610006402.1A CN201610006402A CN105609138A CN 105609138 A CN105609138 A CN 105609138A CN 201610006402 A CN201610006402 A CN 201610006402A CN 105609138 A CN105609138 A CN 105609138A
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11C—STATIC STORES
- G11C19/00—Digital stores in which the information is moved stepwise, e.g. shift registers
- G11C19/28—Digital stores in which the information is moved stepwise, e.g. shift registers using semiconductor elements
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
- G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
- G09G3/3611—Control of matrices with row and column drivers
- G09G3/3674—Details of drivers for scan electrodes
- G09G3/3677—Details of drivers for scan electrodes suitable for active matrices only
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- Liquid Crystal Display Device Control (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
Abstract
The invention discloses a shifting register, a gate driving circuit, a display panel and a display device. The shifting register comprises an input module, a reset module, a pull-up module, a pull-down module and an output control module, and further comprises an input protection module. According to the shifting register, the input module, the reset module, the pull-up module, the pull-down module and the output control module can be controlled by respective control terminals to output scanning signals and achieve the gate driving effect; as the input protection module is additionally arranged, a signal input end is connected with a second reference signal end when the signal input end generates static electricity, the static electricity is directly discharged through the second reference signal end, it is prevented that the shifting register is damaged when the static electricity is led in, and the static-electricity protection capacity of the shifting register is improved.
Description
Technical field
The present invention relates to Display Technique field, relate in particular to a kind of shift register, gate driver circuit, aobviousShow panel and display unit.
Background technology
At present, along with the development of lcd technology, the competition of liquid crystal panel industry is more and more fierce, reduces liquid crystalThe production cost of display floater becomes the preferred option that panel business enhances competitiveness, and in order to reduce display floaterProduction cost, usually, those skilled in the technology concerned utilize the edge of display floater to build gridDrive circuit, gate driver circuit comprises multiple shift registers, the corresponding grid line of each shift register,Multiple shift registers adopt series connection setting, have the triggering letter transmitting step by step between adjacent two shift registersNumber, each shift register receives after triggering signal, to corresponding grid line output grid line sweep signal, andTriggering signal flows to the function that next stage element circuit drives to realize grid, and such design can be savedFrame region at display floater arranges separately grid drive chip, is conducive to realize the narrow frame of display floaterDesign, reduced the production cost of Related product simultaneously, improved the demonstration competitiveness of product in market.
But existing shift register is in the time that exterior static is introduced, and cannot accomplish effectively to protect shift registerCircuit and display floater are not damaged, and then because the introducing of static easily affects shift register and display surfacePlate is realized its normal function.
Therefore, how improving the antistatic capacity of shift register, is that those skilled in the art are urgently to be resolved hurrilyTechnical problem.
Summary of the invention
The embodiment of the present invention provides a kind of shift register, gate driver circuit, display floater and has shown dressPut, in order to improve the antistatic capacity of shift register.
The embodiment of the present invention provides a kind of shift register, comprising: input module, reseting module, on drawModule, drop-down module and output control module; Also comprise: input protection module; Wherein,
The input of described input module is connected with the first reference signal end, and control end is connected with signal input part,Output is connected with first node, and described input module for drawing high institute under the control of described signal input partState the current potential of first node;
The input of described reseting module is connected with the second reference signal end, the first control end and reset signal endBe connected, the second control end is connected with Section Point, and output is connected with described first node, described reset mouldPiece for dragging down the current potential of described first node under the control of described reset signal end or described Section Point;
The first input end of described upper drawing-die piece and the first control end respectively with described the first reference signal end phaseConnect, the second input is connected with described the second reference signal end, and the second control end is connected with described first node,Output is connected with described Section Point, described upper drawing-die piece for described the first reference signal end and described inUnder the control of first node, draw high the current potential of described Section Point;
The input of described drop-down module is connected with described the second reference signal end, control end and described first segmentPoint is connected, and output is connected with described Section Point, and described drop-down module is for the control at described first nodeUnder system, drag down the current potential of described Section Point;
Described output control module is connected in described the second reference signal end, described first node, described secondBetween node, clock signal terminal and sweep signal output, described output control module is used for described firstUnder the control of node, control described sweep signal output and export the signal of described clock signal terminal, and in instituteState under the control of Section Point described the second reference signal end and the conducting of described sweep signal output;
The input of described input protection module is connected with described signal input part, and control end and output are respectivelyBe connected with described the second reference signal end, described input protection module is for producing quiet at described signal input partWhen electricity, by described signal input part and described the second reference signal end conducting.
In a kind of possible embodiment, in the above-mentioned shift register that the embodiment of the present invention provides, described inInput protection module, specifically comprises: the first switching transistor;
The grid of described the first switching transistor is connected with described the second reference signal end respectively with drain electrode, source electrodeBe connected with described signal input part.
In a kind of possible embodiment, in the above-mentioned shift register that the embodiment of the present invention provides, also bagDraw together: output protection module;
The input of described output protection module is connected with described sweep signal output, control end and outputBe connected with described the second reference signal end respectively, described output protection module is for exporting in described sweep signalWhen end produces static, by described sweep signal output and described the second reference signal end conducting.
In a kind of possible embodiment, in the above-mentioned shift register that the embodiment of the present invention provides, described inOutput protection module, specifically comprises: second switch transistor;
The transistorized grid of described second switch is connected with described the second reference signal end respectively with drain electrode, source electrodeBe connected with described sweep signal output.
In a kind of possible embodiment, in the above-mentioned shift register that the embodiment of the present invention provides, described inOutput control module, specifically comprises: the first output control module and the second output control module; Wherein,
Described the first output control module is connected in described first node, described clock signal terminal, and described inBetween sweep signal output, described the first output control module is used under the control of described first node,Control described sweep signal output and export the signal of described clock signal terminal;
Described the second output control module be connected in described the second reference signal end, described Section Point and described inBetween sweep signal output, described the second output control module is used under the control of described Section Point,By described the second reference signal end and the conducting of described sweep signal output.
In a kind of possible embodiment, in the above-mentioned shift register that the embodiment of the present invention provides, described inThe first output control module, specifically comprises: the 3rd switching transistor and the first electric capacity; Wherein,
The grid of described the 3rd switching transistor is connected with described first node, source electrode and described clock signal terminalBe connected, drain electrode is connected with described sweep signal output;
Described the first electric capacity is connected between described first node and described sweep signal output.
In a kind of possible embodiment, in the above-mentioned shift register that the embodiment of the present invention provides, described inThe second output control module, specifically comprises: the 4th switching transistor;
The grid of described the 4th switching transistor is connected with described Section Point, and source electrode and described second is with reference to letterNumber end be connected, drain electrode be connected with described sweep signal output.
In a kind of possible embodiment, in the above-mentioned shift register that the embodiment of the present invention provides, described inThe second output control module, also comprises: the 5th switching transistor;
The grid of described the 5th switching transistor is used for inputting detection control signal, source electrode and described the second referenceSignal end is connected, and drain electrode is connected with described sweep signal output.
In a kind of possible embodiment, in the above-mentioned shift register that the embodiment of the present invention provides, described inInput module, specifically comprises: the 6th switching transistor;
The grid of described the 6th switching transistor is connected with described signal input part, source electrode and described the first referenceSignal end is connected, and drain electrode is connected with described first node.
In a kind of possible embodiment, in the above-mentioned shift register that the embodiment of the present invention provides, described inReseting module, specifically comprises: the 7th switching transistor and the 8th switching transistor; Wherein,
Described minion is closed transistorized grid and is connected with described reset signal end, source electrode and described the second referenceSignal end is connected, and drain electrode is connected with described first node;
The transistorized grid of described the 8th switch is connected with described Section Point, and source electrode and described second is with reference to letterNumber end be connected, drain electrode be connected with described first node.
In a kind of possible embodiment, in the above-mentioned shift register that the embodiment of the present invention provides, described inUpper drawing-die piece, specifically comprises: the 9th switching transistor, the tenth switching transistor and the 11 switching transistor;Wherein,
The grid of described the 9th switching transistor is connected with described the first reference signal end respectively with source electrode, drain electrodeBe connected with the drain electrode of described the 11 switching transistor with the grid of described the tenth switching transistor respectively;
The source electrode of described the tenth switching transistor is connected with described the first reference signal end, drain electrode and described secondNode is connected;
The grid of described the 11 switching transistor is connected with described first node, source electrode and described the second referenceSignal end is connected.
In a kind of possible embodiment, in the above-mentioned shift register that the embodiment of the present invention provides, described inDrop-down module, specifically comprises: twelvemo is closed transistor;
Described twelvemo is closed transistorized grid and is connected with described first node, source electrode and described the second referenceSignal end is connected, and drain electrode is connected with described Section Point.
The embodiment of the present invention provides a kind of gate driver circuit, comprises that multiple embodiment of the present invention of cascade are carriedThe above-mentioned shift register of confession, except first shift register and last shift register, all the otherThe sweep signal output of each shift register is all to the signal of the next shift register being adjacentInput input triggering signal, and multiple to the reset signal end input of the upper shift register being adjacentPosition signal; The sweep signal output of first shift register is to the signal input of second shift registerEnd input triggering signal; The sweep signal output of last shift register moves to self and upper oneThe reset signal end input reset signal of bit register.
The embodiment of the present invention provides a kind of display floater, comprises that the above-mentioned grid that the embodiment of the present invention provides drivesMoving circuit.
The embodiment of the present invention provides a kind of display unit, comprises the above-mentioned display surface that the embodiment of the present invention providesPlate.
The beneficial effect of the embodiment of the present invention comprises:
The embodiment of the present invention provides a kind of shift register, gate driver circuit, display floater and has shown dressPut, this shift register comprises: input module, reseting module, upper drawing-die piece, drop-down module and output controlMolding piece; Also comprise: input protection module; Wherein, input module is under the control of signal input partDraw high the current potential of first node; Reseting module for dragging down the under the control of reset signal end or Section PointThe current potential of one node; Upper drawing-die piece for drawing high second under the control of the first reference signal end and first nodeThe current potential of node; Drop-down module for dragging down the current potential of Section Point under the control of first node; Output controlMolding piece is used for the signal of gated sweep signal output part clock signal end under the control of first node,And under the control of Section Point by the second reference signal end and the conducting of sweep signal output; Input protectionModule is in the time that signal input part produces static, by signal input part and the second reference signal end conducting. ThisSample shift register not only can pass through input module, reseting module, upper drawing-die piece, drop-down module and outputControl module realizes the output of sweep signal under the control of control end separately, realizes the effect that grid drives,And by increasing an input protection module, produce when static signal input part and the at signal input partTwo reference signal end conductings, directly discharge static by the second reference signal end, prevent drawing of staticEnter to damage shift register, improved the antistatic capacity of shift register.
Brief description of the drawings
The structural representation of the shift register that Fig. 1 provides for the embodiment of the present invention;
The concrete structure schematic diagram of the shift register that Fig. 2 provides for the embodiment of the present invention;
Input and output sequential chart when the shift register that Fig. 3 provides for the embodiment of the present invention is normally worked;
The structural representation of the gate driver circuit that Fig. 4 provides for the embodiment of the present invention.
Detailed description of the invention
Below in conjunction with accompanying drawing, the shift register that the embodiment of the present invention is provided, gate driver circuit, demonstrationThe detailed description of the invention of panel and display unit is described in detail.
The embodiment of the present invention provides a kind of shift register, as shown in Figure 1, can comprise: input module01, reseting module 02, upper drawing-die piece 03, drop-down module 04 and output control module 05; Can also comprise:Input protection module 06; Wherein,
The input of input module 01 is connected with the first reference signal end Vref1, control end and signal input partInput is connected, and output is connected with first node P1, and input module 01 is at signal input part InputControl under draw high the current potential of first node P1;
The input of reseting module 02 is connected with the second reference signal end Vref2, the first control end and the letter that resetsNumber end Reset be connected, the second control end is connected with Section Point P2, output is connected with first node P1,Reseting module 02 is for dragging down first node P1 under the control at reset signal end Reset or Section Point P2Current potential;
The first input end of upper drawing-die piece 03 is connected with the first reference signal end Vref1 respectively with the first control end,The second input is connected with the second reference signal end Vref2, and the second control end is connected with first node P1,Output is connected with Section Point P2, and upper drawing-die piece 03 is for the first reference signal end Vref1 and firstUnder the control of node P1, draw high the current potential of Section Point P2;
The input of drop-down module 04 is connected with the second reference signal end Vref2, control end and first nodeP1 is connected, and output is connected with Section Point P2, and drop-down module 04 is for the control at first node P1Under drag down the current potential of Section Point P2;
Output control module 05 is connected in the second reference signal end Vref2, first node P1, Section PointBetween P2, clock signal terminal CLK and sweep signal output Out, output control module 05 is forThe signal of gated sweep signal output part Out clock signal end CLK under the control of one node P1, withAnd under the control of Section Point P2, the second reference signal end Vref2 and sweep signal output Out are ledLogical;
The input of input protection module 06 is connected with signal input part Input, and control end and output are respectivelyBe connected with the second reference signal end Vref2, input protection module 06 is for producing at signal input part InputWhen static, by signal input part Input and the second reference signal end Vref2 conducting.
The above-mentioned shift register that the embodiment of the present invention provides, not only can pass through input module, reseting module,Upper drawing-die piece, drop-down module and output control module are realized the defeated of sweep signal under the control of control end separatelyGo out, realize the effect that grid drives, and by increasing an input protection module, produce at signal input partWhen raw static, by signal input part and the second reference signal end conducting, static is directly passed through to the second reference signalEnd discharges, and prevents that the introducing of static from damaging shift register, has improved the electrostatic defending of shift registerAbility.
In the specific implementation, in the above-mentioned shift register that the embodiment of the present invention provides, as shown in Figure 2, defeatedEntering protection module 06 can specifically comprise: the first switching transistor T1; The grid of the first switching transistor T1The utmost point is connected with the second reference signal end Vref2 respectively with drain electrode, and source electrode is connected with signal input part Input.Particularly, in the time that signal input part Input has exterior static to introduce, due to Capacitance Coupled principle, at signalBetween the grid of input Input and the first switching transistor T1, can produce coupling capacitance, and then cause firstThe potential rise of the grid of switching transistor T1, makes the first switching transistor T1 in conducting state, leadsThe first logical switching transistor T1 is signal input part Input and the second reference signal end Vref2 conducting, fromAnd the large electric current of static that signal input part Input is introduced is put by the second reference signal end Vref2Electricity, prevents that static from arriving display floater inside by shift register output, affects the normal demonstration of display floater.The conducting voltage of other the first switching transistor is set to much larger than threshold voltage, can prevent that like this first opensClose transistor conducting and affect shift register and normally work, the first switch in the time that shift register is normally workedStatic occurs in transistorized conducting explanation introduces, and is abnormal conditions.
In the specific implementation, in the above-mentioned shift register that the embodiment of the present invention provides, as shown in Figure 2, alsoCan comprise: output protection module 07; The input of output protection module 07 and sweep signal output OutBe connected, control end is connected with the second reference signal end Vref2 respectively with output, output protection module 07For in the time that sweep signal output Out produces static, by sweep signal output Out and the second reference letterNumber end Vref2 conducting. Particularly, in the above-mentioned shift register that the embodiment of the present invention provides, can also beOutput arranges an output protection module, in the time that sweep signal output produces static, can pass through like thisStatic is discharged into the second reference signal end by output protection module, and then pass through the second reference signal end by staticDischarge, prevent that static from outputing to the inside of display floater, affect the normal demonstration of display floater.
In the specific implementation, in the above-mentioned shift register that the embodiment of the present invention provides, as shown in Figure 2, defeatedGoing out protection module 07 can specifically comprise: second switch transistor T 2; The grid of second switch transistor T 2The utmost point is connected with the second reference signal end Vref2 respectively with drain electrode, and source electrode is connected with sweep signal output Out.Particularly, in the time that sweep signal output Out has exterior static to introduce, due to Capacitance Coupled principle, sweepingRetouch between signal output part Out and the grid of second switch transistor T 2 and can produce coupling capacitance, and then leadCause the potential rise of the grid of second switch transistor T 2, make second switch transistor T 2 in conducting shapeState, the second switch transistor T 2 of conducting is by sweep signal output Out and the second reference signal end Vref2Conducting, thus make the large electric current of static that sweep signal output Out introduces pass through the second reference signal endVref2 discharges, and prevents that static from arriving display floater inside by shift register output, affects display surfaceThe normal demonstration of plate. The transistorized conducting voltage of second switch is set to much larger than threshold voltage, so in additionCan prevent the conducting and just affect shift register in the time that shift register is normally worked of second switch transistorNormal work, static occurs the transistorized conducting explanation of second switch introduces, and is abnormal conditions.
In the specific implementation, in the above-mentioned shift register that the embodiment of the present invention provides, as shown in Figure 2, defeatedGo out control module, can specifically comprise: the first output control module 051 and the second output control module 052;Wherein, the first output control module 051 is connected in first node P1, clock signal terminal CLK, and sweepsRetouch between signal output part Out, the first output control module 051 is under the control at first node P1,The signal of gated sweep signal output part Out clock signal end CLK; The second output control module 052Be connected between the second reference signal end Vref2, Section Point P2 and sweep signal output Out secondOutput control module 052 is under the control at Section Point P2, by the second reference signal end Vref2 withSweep signal output Out conducting.
Particularly, the first output control module 051 and the second output control module 052 are respectively at first nodeThe signal of corresponding clock signal end CLKB and the second reference signal under the control of P1 and Section Point P2The signal of end Verf2, realize shift register in the corresponding time period to corresponding grid line output scanning signal, driveMoving display floater is realized and being lined by line scan.
In the specific implementation, in the above-mentioned shift register that the embodiment of the present invention provides, as shown in Figure 2, theOne output control module 051, can specifically comprise: the 3rd switching transistor T3 and the first capacitor C 1; ItsIn, the grid of the 3rd switching transistor T3 is connected with first node P1, source electrode and clock signal terminal CLKBe connected, drain electrode is connected with sweep signal output Out; The first capacitor C 1 is connected in first node P1 and sweepsRetouch between signal output part Out. Particularly, in the time that the current potential of first node P1 is drawn high, the 3rd switchTransistor T 3 is in conducting state, the 3rd switching transistor T3 of conducting by clock signal terminal CLK with sweepRetouch signal output part Out conducting, the first capacitor C 1 plays boot strap to the current potential of first node P1 simultaneously,Further keep the current potential of first node P1.
In the specific implementation, in the above-mentioned shift register that the embodiment of the present invention provides, as shown in Figure 2, theTwo output control modules 052 can specifically comprise: the 4th switching transistor T4; The 4th switching transistor T4Grid be connected with Section Point P2, source electrode is connected with the second reference signal end Vref2, drain electrode with scanningSignal output part Out is connected. Particularly, in the time that the current potential of Section Point P2 is drawn high, the 4th switch crystalline substanceBody pipe T4 is in conducting state, the 4th switching transistor T4 of conducting by the second reference signal end Vref2 withSweep signal output Out conducting, makes sweep signal output Out export the second reference signal end Vref2Signal.
In the specific implementation, in the above-mentioned shift register that the embodiment of the present invention provides, mould is controlled in the second outputPiece 052 can also comprise the 5th switching transistor T5, and the grid of the 5th switching transistor T5 is used for inputting inspectionSurvey control signal GCL, source electrode is connected with the second reference signal end Vref2, drain electrode and sweep signal outputOut is connected, and, in the time that shift register is normally worked, the grid of the 5th switching transistor T5 is inputted low electricityThe detection control signal GCL of position, the 5th switching transistor T5 is in cut-off state; When display floater carries outWhen single-board testing, the detection control signal GCL of the grid input high potential of the 5th switching transistor T5, thisTime the 5th switching transistor T5 in conducting state, the 5th switching transistor T5 of conducting by second with reference to letterNumber end Vref2 and sweep signal output Out conducting, thus can be by the second reference signal end Vref2'sSignal outputs to sweep signal output Out, realizes display floater and carries out the test that grid line is opened.
In the specific implementation, in the above-mentioned shift register that the embodiment of the present invention provides, as shown in Figure 2, defeatedEntering module 01 can specifically comprise: the 6th switching transistor T6; The grid of the 6th switching transistor T6 withSignal input part Input is connected, and source electrode is connected with the first reference signal end Vref1, drain electrode and first nodeP1 is connected. Particularly, in the time of signal input part Input input signal, the 6th switching transistor T6 inConducting state, the 6th switching transistor T6 of conducting is by the first reference signal end Vref1 and first node P1Conducting, and then the current potential of first node P1 is drawn high.
In the specific implementation, in the above-mentioned shift register that the embodiment of the present invention provides, as shown in Figure 2, multiplePosition module 02 can specifically comprise: minion is closed transistor T 7 and the 8th switch transistor T 8; Wherein,The grid that minion is closed transistor T 7 is connected with reset signal end Reset, source electrode and the second reference signal endVref2 is connected, and drain electrode is connected with first node P1; The grid of the 8th switch transistor T 8 and Section PointP2 is connected, and source electrode is connected with the second reference signal end Vref2, and drain electrode is connected with first node P1. SpecificallyGround, in the time of reset signal end Reset input signal, minion is closed transistor T 7 in conducting state, leadsLogical minion is closed transistor T 7 by the second reference signal end Vref2 and first node P1 conducting, and then willThe signal of the second reference signal end Vref2 passes to first node P1, drags down the current potential of first node P1;In the time that the current potential of Section Point P2 is drawn high, the 8th switch transistor T 8 is in conducting state, of conductingEight switch transistor Ts 8 are the second reference signal end Vref2 and first node P1 conducting, and then by the second ginsengThe signal of examining signal end Vref2 passes to first node P1, drags down the current potential of first node P1.
In the specific implementation, in the above-mentioned shift register that the embodiment of the present invention provides, as shown in Figure 2, onDrawing-die piece 03 can specifically comprise: the 9th switching transistor T9, the tenth switching transistor T10 and the 11Switching transistor T11; Wherein, the grid of the 9th switching transistor T9 and source electrode are believed with the first reference respectivelyNumber end Vref1 is connected, drain electrode respectively with grid and the 11 switching transistor of the tenth switching transistor T10The drain electrode of T11 is connected; The source electrode of the tenth switching transistor T10 is connected with the first reference signal end Vref1,Drain electrode is connected with Section Point P2; The grid of the 11 switching transistor T11 is connected with first node P1,Source electrode is connected with the second reference signal end Vref2.
Particularly, in the time that the current potential of first node P1 is dragged down, the 11 switching transistor T11 is in cuttingOnly state, due to the grid of the 9th switching transistor T9 and source electrode respectively with the first reference signal end Vref1Be connected, therefore the 9th switching transistor T9 is in normal opening, and then by the first reference signal end Vref1Signal output to the tenth grid of switching transistor T10 and the drain electrode of the 11 switching transistor T11,11 switching transistor T11 are in cut-off state, and the tenth switching transistor T10 is in the first reference signalConducting under the control of the signal of end Vref1, and then the first reference signal end Vref1 and Section Point P2 are ledLogical, thus draw high the current potential of Section Point P2.
In the specific implementation, in the above-mentioned shift register that the embodiment of the present invention provides, as shown in Figure 2, underDrawing-die piece 04 can specifically comprise: twelvemo is closed transistor T 12; Twelvemo is closed transistor T 12Grid is connected with first node P1, and source electrode is connected with the second reference signal end Vref2, drain electrode and second sectionPoint P2 is connected. Particularly, in the time that the current potential of first node P1 is drawn high, twelvemo is closed transistor T 12In conducting state, the twelvemo of conducting is closed transistor T 12 by the second reference signal end Verf2 and secondNode P2 conducting, and then drag down the current potential of Section Point P2.
It should be noted that the switching transistor of mentioning in the above embodiment of the present invention can be thin film transistor (TFT)(TFT, ThinFilmTransistor), can be also metal oxide semiconductor field effect tube (MOS,MetalOxideScmiconductor), do not limit at this. In concrete enforcement, these transistorized sourcesThe utmost point and drain electrode can be exchanged, and do not do concrete differentiation. In the time describing specific embodiment, enter as an example of thin film transistor (TFT) exampleRow explanation.
Below in conjunction with the input and output sequential chart of the Fig. 2 shown in the shift register shown in Fig. 2 and Fig. 3,The course of normal operation (while not having exterior static to introduce) of the shift register that the embodiment of the present invention is provided is doneTo describe. Particularly, choose the t1～t3 three phases in input and output sequential chart as shown in Figure 3. UnderState in description and represent high level signal with 1,0 represents low level signal.
At t1 stage, Input=1, CLK=0, Reset=0, Vref1=1, Vref2=0. Due to Input=1,Therefore the 6th switching transistor T6 conducting, the 6th switching transistor T6 of conducting is by the first reference signal endVref1 and first node P1 conducting, and then the current potential of first node P1 is drawn high, simultaneously to the first electric capacityC1 charging, because the current potential of first node P1 is drawn high, therefore, the 3rd switching transistor T3 and the tenthOne switching transistor T11 and twelvemo are closed transistor T 12 in conducting state, the 3rd switch crystalline substance of conductingBody pipe T3 is clock signal terminal CLK and sweep signal output Out conducting, due to CLK=0 now,Therefore sweep signal output Out output low level signal; The 11 switching transistor T11 of conducting is byThe grid of ten switching transistor T10 and the second reference signal end Vref2 conducting, therefore the tenth switching transistorT10 is in cut-off state; The twelvemo of conducting is closed transistor T 12 by Section Point P2 and the second referenceSignal end Vref2 conducting, drags down the current potential of Section Point P2. The t1 stage is the charging stage.
At t2 stage, Input=0, CLK=1, Reset=0, Vref1=1, Vref2=0. Due to firstThe boot strap of capacitor C 1, the current potential of first node P1 further raises, therefore the 3rd switching transistorT3 is still in conducting state, and CLK=1 now, therefore, sweep signal output Out exports high levelSignal, meanwhile, the 11 switching transistor T11 and twelvemo are closed transistor T 12 still in conducting state,Therefore the current potential of Section Point P2 continues to be dragged down. The t2 stage is sweep signal output stage.
At t3 stage, Input=0, CLK=0, Reset=1, Vref1=1, Vref2=0. Due to Reset=1, therefore minion is closed transistor T 7 conductings, and the minion of conducting is closed transistor T 7 by the second reference signalEnd Vref2 and first node P1 conducting, and then the current potential of first node P1 is dragged down; Due to first nodeThe current potential of P1 is dragged down, and therefore, the 3rd switching transistor T3 is in cut-off state. Now, due to firstThe current potential of node P1 is dragged down, and therefore the 11 switching transistor T11 is in cut-off state, and the 9th opensThe grid that closes transistor T 9 is all connected with the first reference signal end Vref1 with source electrode, therefore the 9th switch crystalline substanceBody pipe T9 conducting, the 9th switching transistor T9 of conducting is by the first reference signal end Vref1 and the tenth switchThe gate turn-on of transistor T 10, now the 11 switching transistor T11 is in cut-off state, and therefore the tenthSwitching transistor T10 conducting under the control of the signal of the first reference signal end Vref1 input, and then by theOne reference signal end Vref1 and Section Point P2 conducting, therefore, the current potential of Section Point P2 is drawn high,Now, because the current potential of Section Point P2 is drawn high, the 4th switching transistor T4 is Section Point P2'sControl lower conducting, the 4th switching transistor T4 of conducting is by low level signal end VGL and sweep signal outputEnd Out conducting, therefore sweep signal output Out output low level signal, eliminates sweep signal outputThe noise of Out; Simultaneously the 8th switch transistor T 8 conducting under the control of Section Point P2, the of conductingEight switch transistor Ts 8, by the second reference signal end Vref2 and first node P1 conducting, further drag downThe current potential of one node P1, the noise of elimination first node P1. The t3 stage is non-sweep signal output stage.
In follow-up time section, sweep signal output Out will be always output low level signal, until certain timeBetween segment signal input Input again when input high level signal, this shift register will repeat above-mentioned workMake engineering.
Be more than shift register do not have exterior static introduce time course of normal operation, work as signal input partWhen Input has exterior static to introduce, due to Capacitance Coupled principle, at signal input part Input and the first switchBetween the grid of transistor T 1, can produce coupling capacitance, and then cause the grid of the first switching transistor T1Potential rise, makes the first switching transistor T1 in conducting state, the first switching transistor T1 of conductingBy signal input part Input and the second reference signal end Vref2 conducting, thereby make signal input part InputThe large electric current of static of introducing discharges by the second reference signal end Vref2, prevents that static from posting by displacementStorage outputs to display floater inside, affects the normal demonstration of display floater. In like manner, when sweep signal outputWhen end Out has exterior static to introduce, due to Capacitance Coupled principle, sweep signal output Out and secondBetween the grid of switching transistor T2, can produce coupling capacitance, and then cause the grid of second switch transistor T 2The potential rise of the utmost point, makes second switch transistor T 2 in conducting state, the second switch crystal of conductingPipe T2, by sweep signal output Out and the second reference signal end Vref2 conducting, believes thereby make to scanThe large electric current of static that number output Out introduces discharges by the second reference signal end Vref2, prevents quietElectricity arrives display floater inside by shift register output, affects the normal demonstration of display floater.
Based on same inventive concept, the embodiment of the present invention provides a kind of gate driver circuit, comprises cascadeThe above-mentioned shift register that multiple embodiment of the present invention provide, except first shift register and last are movedOutside bit register, the sweep signal output of all the other each shift registers is all to the next one being adjacentThe signal input part input triggering signal of shift register, and to the upper shift register being adjacentReset signal end input reset signal; The sweep signal output of first shift register is to second displacementThe signal input part input triggering signal of register; The sweep signal output of last shift register toThe reset signal end input reset signal of self and a upper shift register.
For convenience of description, in Fig. 4, only show eight shift registers, be respectively the 1st grade of shift LDDevice, the 2nd grade of shift register, 3rd level shift register, the 4th grade of shift register, N-3 level are movedBit register, N-2 level shift register, N-1 level shift register, N level shift register.Wherein, the signal output part Out of N-1 level shift register not only opens to connected grid line output gridOpen signal, also to N-2 level shift register output reset signal, simultaneously also to N level shift registerOutput triggering signal.
Particularly, the each shift register in above-mentioned gate driver circuit and above-mentioned displacement provided by the inventionRegister is all identical on function and structure, repeats part and repeats no more.
Based on same inventive concept, the embodiment of the present invention provides a kind of display floater, comprises the invention processThe above-mentioned gate driver circuit that example provides. Principle and the gate driver circuit of dealing with problems due to this display floaterSimilar, therefore the enforcement of this display floater can, referring to the enforcement of above-mentioned gate driver circuit, repeat part notRepeat again.
Based on same inventive concept, the embodiment of the present invention provides a kind of display unit, comprises the invention processThe above-mentioned display floater that example provides. This display unit can be applied to mobile phone, panel computer, television set, aobviousShow any product or parts with Presentation Function such as device, notebook computer, DPF, navigator. ByThe principle of dealing with problems in this display unit is similar to display floater, and therefore the enforcement of this display unit can be joinedSee the enforcement of above-mentioned display floater, repeat part and repeat no more.
The embodiment of the present invention provides a kind of shift register, gate driver circuit, display floater and has shown dressPut, this shift register comprises: input module, reseting module, upper drawing-die piece, drop-down module and output controlMolding piece; Also comprise: input protection module; Wherein, input module is under the control of signal input partDraw high the current potential of first node; Reseting module for dragging down the under the control of reset signal end or Section PointThe current potential of one node; Upper drawing-die piece for drawing high second under the control of the first reference signal end and first nodeThe current potential of node; Drop-down module for dragging down the current potential of Section Point under the control of first node; Output controlMolding piece is used for the signal of gated sweep signal output part clock signal end under the control of first node,And under the control of Section Point by the second reference signal end and the conducting of sweep signal output; Input protectionModule is in the time that signal input part produces static, by signal input part and the second reference signal end conducting. ThisSample shift register not only can pass through input module, reseting module, upper drawing-die piece, drop-down module and outputControl module realizes the output of sweep signal under the control of control end separately, realizes the effect that grid drives,And by increasing an input protection module, produce when static signal input part and the at signal input partTwo reference signal end conductings, directly discharge static by the second reference signal end, prevent drawing of staticEnter to damage shift register, improved the antistatic capacity of shift register.
Obviously, those skilled in the art can carry out various changes and modification and not depart from this present inventionBright spirit and scope. Like this, if of the present invention these amendment and modification belong to the claims in the present invention andWithin the scope of its equivalent technologies, the present invention be also intended to comprise these change and modification interior.
Claims (15)
1. a shift register, comprising: input module, reseting module, upper drawing-die piece, drop-down moduleAnd output control module; It is characterized in that, also comprise: input protection module; Wherein,
The input of described input module is connected with the first reference signal end, and control end is connected with signal input part,Output is connected with first node, and described input module for drawing high institute under the control of described signal input partState the current potential of first node;
The input of described reseting module is connected with the second reference signal end, the first control end and reset signal endBe connected, the second control end is connected with Section Point, and output is connected with described first node, described reset mouldPiece for dragging down the current potential of described first node under the control of described reset signal end or described Section Point;
The first input end of described upper drawing-die piece and the first control end respectively with described the first reference signal end phaseConnect, the second input is connected with described the second reference signal end, and the second control end is connected with described first node,Output is connected with described Section Point, described upper drawing-die piece for described the first reference signal end and described inUnder the control of first node, draw high the current potential of described Section Point;
The input of described drop-down module is connected with described the second reference signal end, control end and described first segmentPoint is connected, and output is connected with described Section Point, and described drop-down module is for the control at described first nodeUnder system, drag down the current potential of described Section Point;
Described output control module is connected in described the second reference signal end, described first node, described secondBetween node, clock signal terminal and sweep signal output, described output control module is used for described firstUnder the control of node, control described sweep signal output and export the signal of described clock signal terminal, and in instituteState under the control of Section Point described the second reference signal end and the conducting of described sweep signal output;
The input of described input protection module is connected with described signal input part, and control end and output are respectivelyBe connected with described the second reference signal end, described input protection module is for producing quiet at described signal input partWhen electricity, by described signal input part and described the second reference signal end conducting.
2. shift register as claimed in claim 1, is characterized in that, described input protection module,Specifically comprise: the first switching transistor;
The grid of described the first switching transistor is connected with described the second reference signal end respectively with drain electrode, source electrodeBe connected with described signal input part.
3. shift register as claimed in claim 2, is characterized in that, also comprises: output protection mouldPiece;
The input of described output protection module is connected with described sweep signal output, control end and outputBe connected with described the second reference signal end respectively, described output protection module is for exporting in described sweep signalWhen end produces static, by described sweep signal output and described the second reference signal end conducting.
4. shift register as claimed in claim 3, is characterized in that, described output protection module,Specifically comprise: second switch transistor;
The transistorized grid of described second switch is connected with described the second reference signal end respectively with drain electrode, source electrodeBe connected with described sweep signal output.
5. the shift register as described in claim 1-4 any one, is characterized in that, described output controlMolding piece, specifically comprises: the first output control module and the second output control module; Wherein,
Described the first output control module is connected in described first node, described clock signal terminal, and described inBetween sweep signal output, described the first output control module is used under the control of described first node,Control described sweep signal output and export the signal of described clock signal terminal;
Described the second output control module be connected in described the second reference signal end, described Section Point and described inBetween sweep signal output, described the second output control module is used under the control of described Section Point,By described the second reference signal end and the conducting of described sweep signal output.
6. shift register as claimed in claim 5, is characterized in that, mould is controlled in described the first outputPiece, specifically comprises: the 3rd switching transistor and the first electric capacity; Wherein,
The grid of described the 3rd switching transistor is connected with described first node, source electrode and described clock signal terminalBe connected, drain electrode is connected with described sweep signal output;
Described the first electric capacity is connected between described first node and described sweep signal output.
7. shift register as claimed in claim 5, is characterized in that, mould is controlled in described the second outputPiece, specifically comprises: the 4th switching transistor;
The grid of described the 4th switching transistor is connected with described Section Point, and source electrode and described second is with reference to letterNumber end be connected, drain electrode be connected with described sweep signal output..
8. shift register as claimed in claim 7, is characterized in that, mould is controlled in described the second outputPiece, also comprises: the 5th switching transistor;
The grid of described the 5th switching transistor is used for inputting detection control signal, source electrode and described the second referenceSignal end is connected, and drain electrode is connected with described sweep signal output.
9. the shift register as described in claim 1-4 any one, is characterized in that, described input mouldPiece, specifically comprises: the 6th switching transistor;
The grid of described the 6th switching transistor is connected with described signal input part, source electrode and described the first referenceSignal end is connected, and drain electrode is connected with described first node.
10. the shift register as described in claim 1-4 any one, is characterized in that, described reset mouldPiece, specifically comprises: the 7th switching transistor and the 8th switching transistor; Wherein,
Described minion is closed transistorized grid and is connected with described reset signal end, source electrode and described the second referenceSignal end is connected, and drain electrode is connected with described first node;
The transistorized grid of described the 8th switch is connected with described Section Point, and source electrode and described second is with reference to letterNumber end be connected, drain electrode be connected with described first node.
11. shift registers as described in claim 1-4 any one, is characterized in that described upper drawing-diePiece, specifically comprises: the 9th switching transistor, the tenth switching transistor and the 11 switching transistor; Wherein,
The grid of described the 9th switching transistor is connected with described the first reference signal end respectively with source electrode, drain electrodeBe connected with the drain electrode of described the 11 switching transistor with the grid of described the tenth switching transistor respectively;
The source electrode of described the tenth switching transistor is connected with described the first reference signal end, drain electrode and described secondNode is connected;
The grid of described the 11 switching transistor is connected with described first node, source electrode and described the second referenceSignal end is connected.
12. shift registers as described in claim 1-4 any one, is characterized in that described lower drawing-diePiece, specifically comprises: twelvemo is closed transistor;
Described twelvemo is closed transistorized grid and is connected with described first node, source electrode and described the second referenceSignal end is connected, and drain electrode is connected with described Section Point.
13. 1 kinds of gate driver circuits, is characterized in that, comprise the multiple as claim 1-12 of cascadeShift register described in any one, except first shift register and last shift register,The sweep signal output of all the other each shift registers is all to the next shift register being adjacentSignal input part input triggering signal, and defeated to the reset signal end of the upper shift register being adjacentEnter reset signal; The sweep signal output of first shift register is to the signal of second shift registerInput input triggering signal; The sweep signal output of last shift register to self and upper oneThe reset signal end input reset signal of individual shift register.
14. 1 kinds of display floaters, is characterized in that, comprise that grid as claimed in claim 13 drives electricityRoad.
15. 1 kinds of display unit, is characterized in that, comprise display floater as claimed in claim 14.
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