CN108447434A - A kind of negative pressure output circuit and display panel - Google Patents

A kind of negative pressure output circuit and display panel Download PDF

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Publication number
CN108447434A
CN108447434A CN201810233643.9A CN201810233643A CN108447434A CN 108447434 A CN108447434 A CN 108447434A CN 201810233643 A CN201810233643 A CN 201810233643A CN 108447434 A CN108447434 A CN 108447434A
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CN
China
Prior art keywords
negative pressure
connect
diode
pole
capacitance
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Pending
Application number
CN201810233643.9A
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Chinese (zh)
Inventor
陈信
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
BOE Technology Group Co Ltd
Fuzhou BOE Optoelectronics Technology Co Ltd
Original Assignee
BOE Technology Group Co Ltd
Fuzhou BOE Optoelectronics Technology Co Ltd
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Application filed by BOE Technology Group Co Ltd, Fuzhou BOE Optoelectronics Technology Co Ltd filed Critical BOE Technology Group Co Ltd
Priority to CN201810233643.9A priority Critical patent/CN108447434A/en
Publication of CN108447434A publication Critical patent/CN108447434A/en
Pending legal-status Critical Current

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Classifications

    • 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
    • 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
    • G09G3/3696—Generation of voltages supplied to electrode drivers
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M3/00—Conversion of dc power input into dc power output
    • H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
    • H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
    • H02M3/06—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using resistors or capacitors, e.g. potential divider
    • H02M3/07—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using resistors or capacitors, e.g. potential divider using capacitors charged and discharged alternately by semiconductor devices with control electrode, e.g. charge pumps
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M3/00—Conversion of dc power input into dc power output
    • H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
    • H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
    • H02M3/06—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using resistors or capacitors, e.g. potential divider
    • H02M3/07—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using resistors or capacitors, e.g. potential divider using capacitors charged and discharged alternately by semiconductor devices with control electrode, e.g. charge pumps
    • H02M3/071—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using resistors or capacitors, e.g. potential divider using capacitors charged and discharged alternately by semiconductor devices with control electrode, e.g. charge pumps adapted to generate a negative voltage output from a positive voltage source

Abstract

The embodiment of the present invention provides a kind of negative pressure output circuit and display panel, wherein negative pressure output circuit includes：First negative pressure sub-circuit and the second negative pressure sub-circuit；First negative pressure sub-circuit is connect with input terminal, node and the first output end, under the action of input terminal, the first negative pressure to be provided to node and the first output end；Second negative pressure sub-circuit, connect with node and second output terminal, under the action of node, the second negative pressure to be provided to second output terminal.Negative pressure output circuit provided in an embodiment of the present invention exports the first negative pressure and the second negative pressure, realizes the output of two-way negative pressure, be not only simple in structure, and cost is relatively low by including the first negative pressure sub-circuit and the second negative pressure sub-circuit.

Description

A kind of negative pressure output circuit and display panel
Technical field
The present embodiments relate to display technology fields, and in particular to a kind of negative pressure output circuit and display panel.
Background technology
With the development of science and technology the display panel of high-resolution, narrow frame becomes the trend of development, occurs array thus Substrate gate driving (Gate Driver on Array, GOA) technology, GOA technologies refer to that will be used for the GOA circuits of driven grid line The technology of the effective display area domain both sides of array substrate is set in display panel.In order to allow GOA circuits shutdown when can Charge is bled off in time, it is desirable to provide two negative pressure.
Through inventor the study found that the circuit for providing two negative pressure at present is not only complicated, but also cost is higher.
Invention content
In order to solve the above-mentioned technical problem, an embodiment of the present invention provides a kind of negative pressure output circuit and display panel, energy It enough realizes the output of two-way negative pressure, is not only simple in structure, and cost is relatively low.
In a first aspect, an embodiment of the present invention provides a kind of negative pressure output circuits, including：First negative pressure sub-circuit and second Negative pressure sub-circuit；
The first negative pressure sub-circuit is connect with input terminal, node and the first output end, for the effect in input terminal Under, provide the first negative pressure to the node and first output end；
The second negative pressure sub-circuit, connect with the node and second output terminal, is used under the action of the node, The second negative pressure is provided to the second output terminal.
Optionally, the first negative pressure sub-circuit includes：First capacitance, the second capacitance, the first diode, the two or two pole Pipe, third diode, the 4th diode and third capacitance；
The first end of first capacitance is connect with the input terminal, and second end and the first pole of first diode connect It connects；
The first end of second capacitance is connect with the input terminal, and second end and the first pole of the third diode connect It connects；
First pole of first diode is connect with the second pole of second diode；Second pole and third electricity The first end of appearance connects；
First pole of second diode is connect with the second pole of third diode；
First pole of the third diode is connect with the second pole of the 4th diode；
First pole of the 4th diode is connect with ground terminal；
The first end of the third capacitance is connect with the node and first output end, and second end connects with ground terminal It connects.
Optionally, the first negative pressure sub-circuit further includes：First resistor and/or the 4th capacitance；Wherein,
The first end of the first resistor is connect with the first end of the third capacitance, and the of second end and third diode Two ends connect；
The first end of 4th capacitance is connect with the first end of third capacitance, second end and the third of the 4th capacitance The second end of capacitance connects.
Optionally, the first negative pressure sub-circuit further includes：5th capacitance；
The first end of 5th capacitance is connect with the first pole of second diode, second end and the described 4th 2 First pole of pole pipe connects.
Optionally, the first negative pressure sub-circuit further includes：Second resistance；
The first end of the second resistance is connect with the node, and second end is connect with the first output end.
Optionally, the second negative pressure sub-circuit, including：3rd resistor, the 4th resistance, the 5th diode and triode；
The first end of the 3rd resistor is connect with the node, and second end is connect with the control pole of the triode；
The first end of 4th resistance is connect with the node, and second end is connect with the first pole of the triode；
First pole of the 5th diode is connect with ground terminal；Second pole is connect with the second end of the 3rd resistor；
First pole of the triode is connect with the second output terminal, the first pole of the second pole and the 5th diode Connection.
Optionally, the second negative pressure sub-circuit further includes：6th capacitance；
The first end of 6th capacitance is connect with the first pole of the triode, second end and the second of the triode Pole connects.
Optionally, the second negative pressure sub-circuit further includes：5th resistance；
The first end of 5th resistance is connect with the first pole of the triode, and second end connects with the second output terminal It connects.
Optionally, the 5th diode is zener diode.
Second aspect, the embodiment of the present invention also provide a kind of display panel, including：Above-mentioned negative pressure output circuit.
The embodiment of the present invention provides a kind of negative pressure output circuit and display panel, wherein negative pressure output circuit includes：First Negative pressure sub-circuit and the second negative pressure sub-circuit；First negative pressure sub-circuit connect with input terminal, node and the first output end, is used for Under the action of input terminal, the first negative pressure is provided to node and the first output end；Second negative pressure sub-circuit, it is defeated with node and second Outlet connects, under the action of node, the second negative pressure to be provided to second output terminal.Negative pressure provided in an embodiment of the present invention is defeated Go out circuit by including the first negative pressure sub-circuit and the second negative pressure sub-circuit, exports the first negative pressure and the second negative pressure, realize two-way Negative pressure exports, and is not only simple in structure, and cost is relatively low.
Certainly, implement the embodiment of the present invention any product or method it is not absolutely required to and meanwhile reach above-described institute There is advantage.The other feature and advantage of the embodiment of the present invention will illustrate in subsequent specification embodiment, also, partly from It becomes apparent in specification embodiment, or is understood by implementing the embodiment of the present invention.The purpose of the embodiment of the present invention It can be realized and obtain by specifically noted structure in specification, claims and attached drawing with other advantages.
Description of the drawings
Attached drawing is used for providing further understanding technical solution of the embodiment of the present invention, and one of constitution instruction Point, the technical solution together with embodiments herein for explaining the embodiment of the present invention is not constituted to the embodiment of the present invention The limitation of technical solution.
Fig. 1 is the structural schematic diagram of negative pressure output circuit provided in an embodiment of the present invention；
Fig. 2 is an equivalent circuit diagram of the first negative pressure sub-circuit provided in an embodiment of the present invention；
Fig. 3 is another equivalent circuit diagram of the first negative pressure sub-circuit provided in an embodiment of the present invention；
Fig. 4 is an equivalent circuit diagram of the second negative pressure sub-circuit provided in an embodiment of the present invention；
Fig. 5 is another equivalent circuit diagram of the second negative pressure sub-circuit provided in an embodiment of the present invention；
Fig. 6 is the equivalent circuit diagram of negative pressure output circuit provided in an embodiment of the present invention.
Reference sign：
INPUT：Input terminal；
OUTPUT1：First output end；
OUTPUT2：Second output terminal；
C1~C6：Capacitance；
R1~R5：Resistance；
Q：Triode；
D1~D5：Diode；
N：Node.
Specific implementation mode
Understand in order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with attached drawing pair The embodiment of the embodiment of the present invention is described in detail.It should be noted that in the absence of conflict, the implementation in the application Feature in example and embodiment mutually can be combined arbitrarily.
Step shown in the flowchart of the accompanying drawings can be in the computer system of such as a group of computer-executable instructions It executes.Also, although logical order is shown in flow charts, and it in some cases, can be with suitable different from herein Sequence executes shown or described step.
Unless otherwise defined, the embodiment of the present invention discloses the technical term used or scientific terminology should be the present invention in fact Apply the ordinary meaning that the personage with general technical ability is understood in a fields." first " that is used in the embodiment of the present invention, " second " and similar word are not offered as any sequence, quantity or importance, and are used only to distinguish different compositions Part.The element or flase drop that the similar word such as " comprising " or "comprising" goes out always before the word, which are covered, to be appeared in behind the word The element enumerated either object and its equivalent and be not excluded for other elements or object." connection " or " connected " etc. are similar Word is not limited to physics or mechanical connection, but may include electrical connection, either directly or between It connects.
Embodiment one
Fig. 1 is the structural schematic diagram of negative pressure output circuit provided in an embodiment of the present invention, as shown in Figure 1, the present invention is implemented Example provide negative pressure output circuit include：First negative pressure sub-circuit and the second negative pressure sub-circuit.
In the present embodiment, the first negative pressure sub-circuit connects with input terminal INPUT, node N and the first output end OUTPUT1 It connects, under the action of input terminal INPUT, the first negative pressure to be provided to node N and the first output end OUTPUT1；Second negative pressure Sub-circuit is connect with node N and second output terminal OUTPUT2, is used under the action of node N, to second output terminal OUTPUT2 Second negative pressure is provided.
Specifically, the signal of input terminal INPUT inputs is square-wave signal.First output end OUTPUT1 and second output terminal OUTPUT2 outputs are different negative pressure.
Negative pressure output circuit provided in an embodiment of the present invention includes：First negative pressure sub-circuit and the second negative pressure sub-circuit；Institute The first negative pressure sub-circuit is stated, is connect with input terminal, node and the first output end, is used under the action of input terminal, to the section Point and first output end provide the first negative pressure；The second negative pressure sub-circuit, connect with the node and second output terminal, For under the action of the node, the second negative pressure to be provided to the second output terminal.Negative pressure provided in an embodiment of the present invention is defeated Go out circuit by including the first negative pressure sub-circuit and the second negative pressure sub-circuit, generates the first negative pressure and the second negative pressure, avoid adopting With integrated circuit, realizes the output of two-way negative pressure, be not only simple in structure, and cost is relatively low.
Optionally, Fig. 2 is an equivalent circuit diagram of the first negative pressure sub-circuit provided in an embodiment of the present invention；Such as Fig. 2 institutes Show, the first negative pressure sub-circuit includes：First capacitance C1, the second capacitance C2, the first diode D1, the second diode D2, the three or two Pole pipe D3, the 4th diode D4 and third capacitance C3.
In the present embodiment, the first end of the first capacitance C1 is connect with input terminal INPUT, second end and the first diode D1 The first pole connection；The first end of second capacitance C2 is connect with input terminal INPUT, the first pole of second end and third diode D3 Connection；The first pole of first diode D1 is connect with the second pole of the second diode D2；Second pole and the first of third capacitance C3 End connection；The first pole of second diode D2 is connect with the second pole of third diode D3；The first pole of third diode D3 with The second pole of 4th diode D4 connects；The first pole of 4th diode D4 is connect with ground terminal；The first end of third capacitance C3 It is connect with node N and the first output end OUTPUT1, second end is connect with ground terminal.
Optionally, the first diode D1, the second diode D2, third diode D3 and the 4th diode D4 are Schottky two Pole pipe.It should be noted that in the present embodiment, the first pole refers to that cathode, the second pole refer to anode.
Optionally, the type of the first capacitance C1 and the second capacitance C2 and capacity all same, it should be noted that the first capacitance C1 and the second capacitance C2 can be the liquid crystal capacitance being made of pixel electrode and public electrode, can also be by pixel electrode and public affairs The equivalent capacity that the liquid crystal capacitance and storage capacitance that common electrode is constituted are constituted, the embodiment of the present invention are not construed as limiting this.
It should be noted that the effect of the first capacitance C1 and the second capacitance C2 are energy storage, the first diode D1, the two or two pole Pipe D2, third diode D3 and the 4th diode D4 are functionally quite and charge pump.
Specifically, assuming that the voltage of the high level signal of input terminal input is V1, the voltage of the low level signal of input is 0V；When input terminal INPUT input be high level signal when, the first capacitance C1 and the second capacitance C2 chargings have two at this time Charge circuit：First charge circuit is the first capacitance C1, the second diode D2, third diode D3 and the 4th diode D5, Second charge circuit is the second capacitance C2 and the 4th diode D4；What it is when input terminal INPUT input is low level signal, first The voltage of the second end of capacitance C1 and the second capacitance C2 declines, and negative pressure-V1 is reduced to, due to the first capacitance C1's and the second capacitance C2 The voltage of second end is negative pressure, and is less than the voltage of the first output end OUTPUT1, at this point, the first diode D1 conductings, the one or two Pole pipe D1 is clamped, at this point, the output of the first output end OUTPUT1 is-V1With the conduction voltage drop of the first diode D1.
In the present embodiment, can by replace the first diode D1 or change the signal of input terminal INPUT input come Change the first negative pressure of the first output end output.
Specifically, third capacitance C3 is used for rectification so that the first output end OUTPUT1 exports the first negative pressure.
It should be noted that an example arrangement of the first negative pressure sub-circuit has been shown in particular in Fig. 2.Art technology Personnel, which are readily appreciated that, is, the realization method of the first negative pressure sub-circuit is without being limited thereto, as long as its function can be realized.
Optionally, Fig. 3 is another equivalent circuit diagram of the first negative pressure sub-circuit provided in an embodiment of the present invention；Such as Fig. 3 institutes Show, the first negative pressure sub-circuit further includes：First resistor R1 and/or the 4th capacitance C4.
In the present embodiment, the first end of first resistor R1 is connect with the first end of third capacitance C3, second end and third The second end of capacitance C3 connects；The first end of 4th capacitance C4 is connect with the first end of third capacitance C3, second end and third electricity Hold the second end connection of C3, i.e. first resistor R1, third capacitance C3 and the 4th capacitance C4 are in parallel.
In the present embodiment, the current potential of the first output end OUTPUT1 is pulled to by first resistor R1 for discharging during shutdown 0V。
In the present embodiment, third capacitance C3 and the 4th capacitance C4 act as rectifying and wave-filtering, for that will flow to the first output The signal rectification at end filters, it should be noted that the first capacitance C3 and the second capacitance C4 can be by pixel electrode and common electrical The liquid crystal capacitance that pole is constituted can also be that the liquid crystal capacitance being made of pixel electrode and public electrode and storage capacitance are constituted Equivalent capacity, the embodiment of the present invention are not construed as limiting this.
Optionally, as shown in figure 3, the first negative pressure sub-circuit further includes：5th capacitance C5, the first end of the 5th capacitance C5 with The second diode D2 the connection of the first pole, second end connect with the first pole of the 4th diode D4.
In the present embodiment, the 5th capacitance C5, for flow to the signal of third diode D3 and the 4th diode D4 into Row filtering, it should be noted that the first capacitance C5 can be the liquid crystal capacitance being made of pixel electrode and public electrode, can also It is the liquid crystal capacitance being made of pixel electrode and public electrode and the equivalent capacity that storage capacitance is constituted, the embodiment of the present invention pair This is not construed as limiting.
Optionally, as shown in figure 3, the first negative pressure sub-circuit further includes：Second resistance R2；The first end of second resistance R2 with Node N connections, second end are connect with the first output end OUTPUT1.
In the present embodiment, second resistance R2 is used for current limliting, can be also used for test and flows through electric current.
It should be noted that the another exemplary structure of the first negative pressure sub-circuit has been shown in particular in Fig. 3.Art technology Personnel, which are readily appreciated that, is, the realization method of the first negative pressure sub-circuit is without being limited thereto, as long as its function can be realized.
Optionally, Fig. 4 is an equivalent circuit diagram of the second negative pressure sub-circuit provided in an embodiment of the present invention, such as Fig. 4 institutes Show, the second negative pressure sub-circuit provided in an embodiment of the present invention, including：3rd resistor R3, the 4th resistance R4, the 5th diode D5 and Triode Q.
Specifically, the first end of 3rd resistor R3 is connect with node N, second end is connect with the control pole of triode Q；4th The first end of resistance R4 is connect with node N, and second end is connect with the first pole of triode Q；The first pole of 5th diode D5 with Ground terminal connects；Second pole is connect with the second end of 3rd resistor R3；The first pole of triode Q and second output terminal OUTPUT2 Connection, the second pole is connect with the first pole of the 5th diode D5.
Optionally, the 5th diode D5 is zener diode, wherein the first extremely cathode, the second extremely anode.
Optionally, the control of triode Q extremely base stage, the first extremely emitter, the second extremely collector.
Specifically, 3rd resistor R3 and the 4th resistance R4 is used for current limliting.
In the present embodiment, the voltage of the anode of the 5th diode D5 is identical as the first negative pressure, and the voltage of cathode is 0V, this When, the 5th diode D5 reverse-conductings, the base voltage of triode can be clamped at the voltage stabilizing value of the 5th diode D5 after conducting, At this point, base emitter when voltage stabilizing value of the actual voltage value of the second negative pressure equal to the 5th diode D5 adds the saturation of triode Voltage value between pole.
It in the present embodiment, can be by replacing different the 5th diode and triode come the second negative pressure of flexible modulation.
It should be noted that an example arrangement of the second negative pressure sub-circuit has been shown in particular in Fig. 4.Art technology Personnel, which are readily appreciated that, is, the realization method of the second negative pressure sub-circuit is without being limited thereto, as long as its function can be realized.
Optionally, Fig. 5 is another equivalent circuit diagram of the second negative pressure sub-circuit provided in an embodiment of the present invention；Such as Fig. 5 institutes Show, the second negative pressure sub-circuit provided in an embodiment of the present invention further includes：6th capacitance C6；The first end of 6th capacitance C6 and three poles The first pole of pipe Q connects, and second end is connect with the second pole of triode Q.
In the present embodiment, the 6th capacitance C6 is for filtering.
Optionally, as shown in figure 5, the second negative pressure sub-circuit provided in an embodiment of the present invention further includes：5th resistance R5；The The first end of five resistance R5 is connect with the first pole of triode Q, and second end is connect with second output terminal OUTPUT2.
In the present embodiment, the 5th resistance R5 is applied not only to current limliting, is additionally operable to test and flows through electric current.
It should be noted that the another exemplary structure of the second negative pressure sub-circuit has been shown in particular in Fig. 5.Art technology Personnel, which are readily appreciated that, is, the realization method of the second negative pressure sub-circuit is without being limited thereto, as long as its function can be realized.
In the present embodiment, it is next real to use a small amount of independent component for the first negative pressure sub-circuit and the second negative pressure sub-circuit It is existing.
Optionally, Fig. 6 is the equivalent circuit diagram of negative pressure output circuit provided in an embodiment of the present invention, as shown in fig. 6, this hair The negative pressure output circuit that bright embodiment provides includes：5 diodes (D1~D5), 5 resistance units (R1~R5), 6 Capacitor cell (C1~C6), 1 input terminal (INPUT) and 2 output ends (OUTPUT1 and OUTPUT2).
Specifically, negative pressure output circuit includes：First negative pressure sub-circuit and the second negative pressure sub-circuit, wherein the first negative pressure Sub-circuit includes：First capacitance C1, the second capacitance C2, the first diode D1, the second diode D2, third diode D3, the 4th Diode D4, third capacitance C3, the 4th capacitance C4, the 5th capacitance C5, first resistor R1 and second resistance R2；Second negative pressure son electricity Road includes：3rd resistor R3, the 4th resistance R4, the 5th diode D5, triode Q, the 6th capacitance C6 and the 5th resistance R5.
Specifically, the first end of the first capacitance C1 is connect with input terminal INPUT, second end and the first of the first diode D1 Pole connects；The first end of second capacitance C2 is connect with input terminal INPUT, and second end is connect with the first pole of third diode D3； The first pole of first diode D1 is connect with the second pole of the second diode D2；Second pole and the first end of third capacitance C3 connect It connects；The first pole of second diode D2 is connect with the second pole of third diode D3；The first pole and the 4th of third diode D3 The second pole of diode D4 connects；The first pole of 4th diode D4 is connect with ground terminal；The first end of 5th capacitance C5 and The first pole of second diode D2 connects, and second end is connect with the first pole of the 4th diode D4；The first end of first resistor R1 It is connect with the first end of third capacitance C3, second end is connect with the second end of third capacitance C3；The first end of third capacitance C3 with Node N connections, second end are connect with ground terminal；The first end of 4th capacitance C4 is connect with the first end of third capacitance C3, and second End is connect with the second end of third capacitance C3；The first end of second resistance R2 is connect with node N, second end and the first output end OUTPUT1 connections；The first end of 3rd resistor R3 is connect with node N, and second end is connect with the control pole of triode Q；4th electricity The first end of resistance R4 is connect with node N, and second end is connect with the first pole of triode Q；The first pole of 5th diode D5 with connect Ground terminal connects；Second pole is connect with the second end of 3rd resistor R3；The first pole of triode Q connects with second output terminal OUTPUT2 It connects, the second pole is connect with the first pole of the 5th diode D5；The first end of 6th capacitance C6 is connect with the first pole of triode Q, Second end is connect with the second pole of triode Q；The first end of 5th resistance R5 is connect with the first pole of triode Q, second end with Second output terminal OUTPUT2 connections.
The technical solution of embodiment is further illustrated the present invention below by the course of work of negative pressure output circuit.
When input terminal INPUT input be high level signal when, input terminal is worked as in the first capacitance C1 and the second capacitance C2 chargings INPUT inputs are low level signals, and the voltage of the second end of the first capacitance C1 and the second capacitance C2 declines, and is reduced to negative pressure, this When, the first diode D1 conductings, the first diode D1 is clamped, at this point, the first output end OUTPUT1 exports the first negative pressure；The Five diode D5 reverse-conductings, the base voltage of triode Q can be clamped at the voltage stabilizing value of the 5th diode D5 after conducting, this When, base-emitter when voltage stabilizing value of the actual voltage value equal to the 5th diode D5 of the second negative pressure adds the saturation of triode Between voltage value, second output terminal OUTPUT2 exports the second negative pressure.
Embodiment two
Inventive concept based on above-described embodiment, the embodiment of the present invention also provide a kind of display panel, the embodiment of the present invention The display panel of offer includes：Negative pressure output circuit.
Wherein, negative pressure output circuit is the negative pressure output circuit that embodiment one provides, realization principle and realization effect class Seemingly, details are not described herein.
There is the following to need to illustrate：
Attached drawing of the embodiment of the present invention pertain only to the present embodiments relate to structure, other structures, which can refer to, usually to be set Meter.
In the absence of conflict, the feature in embodiment, that is, embodiment of the embodiment of the present invention can be combined with each other to obtain To new embodiment.
Although the embodiment disclosed by the embodiment of the present invention is as above, only the present invention is real for ease of understanding for the content The embodiment applied example and used is not limited to the embodiment of the present invention.Skill in any fields of the embodiment of the present invention Art personnel can be in the form and details of implementation under the premise of not departing from the spirit and scope disclosed by the embodiment of the present invention It is upper to carry out any modification and variation, but the scope of patent protection of the embodiment of the present invention, it still must be with appended claims institute Subject to the range defined.

Claims (10)

1. a kind of negative pressure output circuit, which is characterized in that including：First negative pressure sub-circuit and the second negative pressure sub-circuit；
The first negative pressure sub-circuit is connect with input terminal, node and the first output end, is used under the action of input terminal, to The node and first output end provide the first negative pressure；
The second negative pressure sub-circuit, connect with the node and second output terminal, is used under the action of the node, to institute It states second output terminal and the second negative pressure is provided.
2. negative pressure output circuit according to claim 1, which is characterized in that the first negative pressure sub-circuit includes：First Capacitance, the second capacitance, the first diode, the second diode, third diode, the 4th diode and third capacitance；
The first end of first capacitance is connect with the input terminal, and second end is connect with the first pole of first diode；
The first end of second capacitance is connect with the input terminal, and second end is connect with the first pole of the third diode；
First pole of first diode is connect with the second pole of second diode；Second pole and the third capacitance First end connects；
First pole of second diode is connect with the second pole of third diode；
First pole of the third diode is connect with the second pole of the 4th diode；
First pole of the 4th diode is connect with ground terminal；
The first end of the third capacitance is connect with the node and first output end, and second end is connect with ground terminal.
3. negative pressure output circuit according to claim 2, which is characterized in that the first negative pressure sub-circuit further includes：The One resistance and/or the 4th capacitance；Wherein,
The first end of the first resistor is connect with the first end of the third capacitance, the second end of second end and third diode Connection；
The first end of 4th capacitance is connect with the first end of third capacitance, the second end of the 4th capacitance and the third capacitance Second end connection.
4. negative pressure output circuit according to claim 2 or 3, which is characterized in that the first negative pressure sub-circuit further includes： 5th capacitance；
The first end of 5th capacitance is connect with the first pole of second diode, second end and the 4th diode The first pole connection.
5. negative pressure output circuit according to claim 4, which is characterized in that the first negative pressure sub-circuit further includes：The Two resistance；
The first end of the second resistance is connect with the node, and second end is connect with the first output end.
6. negative pressure output circuit according to claim 1, which is characterized in that the second negative pressure sub-circuit, including：Third Resistance, the 4th resistance, the 5th diode and triode；
The first end of the 3rd resistor is connect with the node, and second end is connect with the control pole of the triode；
The first end of 4th resistance is connect with the node, and second end is connect with the first pole of the triode；
First pole of the 5th diode is connect with ground terminal；Second pole is connect with the second end of the 3rd resistor；
First pole of the triode is connect with the second output terminal, and the second pole and the first pole of the 5th diode connect It connects.
7. negative pressure output circuit according to claim 6, which is characterized in that the second negative pressure sub-circuit further includes：The Six capacitances；
The first end of 6th capacitance is connect with the first pole of the triode, and second end and the second pole of the triode connect It connects.
8. the negative pressure output circuit described according to claim 6 or 7, which is characterized in that the second negative pressure sub-circuit further includes： 5th resistance；
The first end of 5th resistance is connect with the first pole of the triode, and second end is connect with the second output terminal.
9. negative pressure output circuit according to claim 6, which is characterized in that the 5th diode is zener diode.
10. a kind of display panel, which is characterized in that including：Such as claim 1-9 any one of them negative pressure output circuits.
CN201810233643.9A 2018-03-20 2018-03-20 A kind of negative pressure output circuit and display panel Pending CN108447434A (en)

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