CN109509450A - Reference voltage regulating circuit, driving circuit of display panel and display device - Google Patents
Reference voltage regulating circuit, driving circuit of display panel and display device Download PDFInfo
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- CN109509450A CN109509450A CN201811561444.7A CN201811561444A CN109509450A CN 109509450 A CN109509450 A CN 109509450A CN 201811561444 A CN201811561444 A CN 201811561444A CN 109509450 A CN109509450 A CN 109509450A
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- 230000001105 regulatory effect Effects 0.000 title abstract 3
- 239000003990 capacitor Substances 0.000 claims description 21
- 239000004973 liquid crystal related substance Substances 0.000 claims description 19
- 230000005611 electricity Effects 0.000 claims description 13
- 238000010248 power generation Methods 0.000 claims description 4
- 238000001914 filtration Methods 0.000 claims description 2
- 239000010409 thin film Substances 0.000 abstract description 4
- 238000010521 absorption reaction Methods 0.000 abstract 2
- 239000010408 film Substances 0.000 description 8
- 230000000630 rising effect Effects 0.000 description 8
- 230000000694 effects Effects 0.000 description 7
- 238000000034 method Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000010992 reflux Methods 0.000 description 2
- 210000004899 c-terminal region Anatomy 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000011982 device technology Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000035772 mutation Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
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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
- G09G3/3696—Generation of voltages supplied to electrode drivers
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- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
Abstract
The invention discloses a reference voltage regulating circuit, a driving circuit of a display panel and a display device, wherein the reference voltage regulating circuit comprises a reference voltage input end, a time sequence trigger circuit, a switch circuit and an absorption circuit, the reference voltage input end is connected with reference voltage, the time sequence trigger circuit is connected with a control signal and outputs a corresponding driving signal according to the control signal, the switch circuit is switched on/off according to the driving signal and outputs the reference voltage to a source electrode driving chip when the switch circuit is switched on, and the absorption circuit filters the sudden wave of the reference voltage output to the source electrode driving chip when the switch circuit is switched off, so that the technical problem that the reference voltage of a source electrode thin film driving chip in the prior art is easy to generate the sudden wave is solved.
Description
Technical field
The present invention relates to display device technology fields, in particular to the driving electricity of reference voltage adjusting circuit, display panel
Road and display device.
Background technique
(Thin Film Transistor Liquid Crystal Display, tft liquid crystal are aobvious by TFT-LCD
Show device) it is one of the principal item that current flat panel is shown, have become modern IT, display platform important in video product.
The main driving principle of TFT-LCD, system board pass through R/G/B compressed signal, control signal and power supply on wire rod and pcb board
(connector) is connected for connectivity port, and data are by the TCON (Timing Controller, sequence controller) on pcb board
After IC processing, through pcb board, pass through S-COF (Source-Chip on Film, source level film driving chip) and G-COF (Gate-
Chip on Film, grid film driving chip) it is connect with viewing area, so that LCD obtains required power supply and signal.
Wherein, it is the display effect for guaranteeing liquid crystal display panel, needs to provide reference voltage, and because liquid crystal display panel to S-COF
Effective district and non-active area can be all divided into every a line time of display.In the effective district time, S-COF is needed to viewing area
Pixel electrode charging is heavy condition for PCB.Rather than have in the effective district time, it does not need to charge to pixel electrode, it is right
It is light condition for PCB.In heavy duty and underloading handoff procedure, it will cause reference voltage and generate surging.
Summary of the invention
The main object of the present invention is to propose that a kind of reference voltage adjusts circuit, and realization filters out source level film driving chip
The purpose of reference voltage surging.
To achieve the above object, the present invention proposes that a kind of reference voltage adjusts circuit, and the reference voltage adjusts circuit packet
It includes:
Reference voltage input terminal is set as access reference voltage；
The input terminal of timing trigger circuit, the timing trigger circuit is connect with sequence controller, the timing triggering electricity
Road is set as incoming control signal, and exports corresponding driving signal according to control signal；
Switching circuit, the input terminal of the switching circuit are connect with the reference voltage input terminal, the switching circuit
Controlled end is connect with the output end of the timing trigger circuit, and the output end of the switching circuit is connect with source driving chip,
The switching circuit is set as according to the driving signal ON/OFF, and in switching circuit conducting, by the reference
Voltage output is to the source driving chip；
Absorbing circuit, the input terminal of the absorbing circuit are connect with the reference voltage input terminal, the absorbing circuit
Output end is connect with the source driving chip, and the absorbing circuit is set as filtering out output to institute when switching circuit turns off
State the surging of the reference voltage of source driving chip.
Optionally, the absorbing circuit includes first resistor and first capacitor, and the first end of the first resistor is described
The input terminal of absorbing circuit, the second end of the first resistor are connect with the first end of the first capacitor, the first resistor
Connecting node with the first capacitor is the output end of the absorbing circuit, the second end ground connection of the first capacitor.
Optionally, the absorbing circuit further includes the first one-way conduction element, the first end of the first capacitor and institute
The output end for stating absorbing circuit only passes through the first one-way conduction element connection, and the input of the first one-way conduction element
The first end interconnection at end, the second end of the first resistor and the first capacitor, the output of the first one-way conduction element
End is the output end of the absorbing circuit.
Optionally, the first one-way conduction element includes first diode.
Optionally, the switching circuit includes first switch tube, and the grid of the first switch tube is the switching circuit
Controlled end, the first end of the first switch tube is the input terminal of the switching circuit, the second end of the first switch tube
For the output end of the switching circuit.
Optionally, the timing trigger circuit includes driving signal trigger circuit and reset circuit, the driving signal touching
Power Generation Road includes input terminal, input/output terminal and output end, and the reset circuit includes that the first input/output terminal and second are defeated
Enter/output end, the input terminal of the driving signal trigger circuit is connect with the reference voltage input terminal, the driving signal touching
Second input/output of the input/output terminal of Power Generation Road, the first input/output terminal of the reset circuit, the reset circuit
The controlled end interconnection at end, the output end of the driving signal trigger circuit and the switching circuit.
Optionally, the driving signal trigger circuit includes the first trigger, the first phase inverter and second resistance, and described the
The control signal input of one trigger is the input terminal of the driving signal trigger circuit, the assignment letter of first trigger
The output end interconnection of number input terminal, the first end of the second resistance and first phase inverter, the second resistance with it is described
The connecting node of first phase inverter is the output end of the driving signal trigger circuit, the output end of first trigger and institute
State the input terminal connection of the first phase inverter；The second end of the second resistance is grounded.
Optionally, the driving signal trigger circuit further includes the second one-way conduction element, the second one-way conduction member
The input terminal of part is the input terminal of the driving signal trigger circuit, the output end of the second one-way conduction element and described the
The control signal input of one trigger, the connecting node of the first trigger described in the second one-way conduction element are the drive
The input/output terminal of dynamic signal trigger circuit.
Optionally, the second one-way conduction element includes the second diode.
Optionally, the reset circuit includes the second trigger and the second phase inverter, and the control of second trigger is believed
Number input terminal is the first input/output terminal of the reset circuit, the control signal input of second trigger with it is described
The output end of second phase inverter connects, and the output end of second phase inverter is the first input/output terminal of the reset circuit,
The assertive signal input terminal of second trigger is the second input/output terminal of the reset circuit, second trigger
Output end connect with the input terminal of second phase inverter.
Optionally, the reset circuit further includes pull-down circuit, the input terminal of the pull-down circuit and the reset circuit
The first input/output terminal connection, the pull-down circuit output end ground connection.
Optionally, the pull-down circuit includes 3rd resistor.
To achieve the above object, the present invention also proposes a kind of driving circuit of display panel, including sequence controller source electrode
Driving chip and reference voltage as described above adjust circuit, and the sequence controller is connect with the source driving chip,
The output end that the reference voltage adjusts circuit is connect with the reference voltage input terminal of the source driving chip, and the source electrode drives
The output end of dynamic chip is connect with the pixel electrode of the liquid crystal display panel.
To achieve the above object, the present invention also proposes a kind of display device, the driving including display panel as described above
Circuit.
Reference voltage input terminal, timing trigger circuit, switching circuit is arranged by adjusting circuit in reference voltage in the present invention
And absorbing circuit, the input terminal of the timing trigger circuit are connect with sequence controller, the input terminal of the switching circuit with
The reference voltage input terminal connection, the controlled end of the switching circuit are connect with the output end of the timing trigger circuit, institute
The output end for stating switching circuit is connect with source driving chip, the input terminal of the absorbing circuit and the reference voltage input terminal
Connection, the output end of the absorbing circuit are connect with the source driving chip.Wherein, reference voltage input terminal access is with reference to electricity
Pressure, timing trigger circuit incoming control signal, and corresponding driving signal is exported according to control signal, so that switching circuit
It can be according to the driving signal ON/OFF, and in switching circuit conducting, by the reference voltage output to described
Source driving chip.Absorbing circuit is filtered out and is exported to the reference voltage of the source driving chip when switching circuit turns off
Surging.To solve the problems, such as that the reference voltage in source level film driving chip generates surging.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
The structure shown according to these attached drawings obtains other attached drawings.
Fig. 1 is the module diagram that reference voltage of the present invention adjusts circuit；
Fig. 2 is the circuit diagram that reference voltage of the present invention adjusts circuit；
Fig. 3 is that the invention shows the schematic diagrames of the driving circuit of panel；
Fig. 4 is the schematic diagram for the control signal that reference voltage of the present invention adjusts sequence controller in circuit.
The embodiments will be further described with reference to the accompanying drawings for the realization, the function and the advantages of the object of the present invention.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiment is only a part of the embodiments of the present invention, instead of all the embodiments.Base
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts it is all its
His embodiment, shall fall within the protection scope of the present invention.
It is to be appreciated that if relating to directionality instruction (such as up, down, left, right, before and after ...) in the embodiment of the present invention,
Then directionality instruction be only used for explain under a certain particular pose (as shown in the picture) between each component relative positional relationship,
Motion conditions etc., if the particular pose changes, directionality instruction is also correspondingly changed correspondingly.
In addition, being somebody's turn to do " first ", " second " etc. if relating to the description of " first ", " second " etc. in the embodiment of the present invention
Description be used for description purposes only, be not understood to indicate or imply its relative importance or implicitly indicate indicated skill
The quantity of art feature." first " is defined as a result, the feature of " second " can explicitly or implicitly include at least one spy
Sign.It in addition, the technical solution between each embodiment can be combined with each other, but must be with those of ordinary skill in the art's energy
It is enough realize based on, will be understood that the knot of this technical solution when conflicting or cannot achieve when occurs in the combination of technical solution
Conjunction is not present, also not the present invention claims protection scope within.
The present invention proposes that a kind of reference voltage adjusts circuit, and the reference voltage for solving source level film driving chip is easy
The technical issues of generating surging.
In example technique, reference voltage input terminal is directly connect with source driving chip, and liquid crystal display panel is shown
Every a line time in be divided into effective district and non-active area, in effective district, source driving chip be pixel electrode charging, output
The pcb board (for the driving plate of liquid crystal display panel) of reference voltage is in heavy condition, and in non-active area, source drive core
Piece does not need to charge for pixel electrode, and the pcb board (for the driving plate of liquid crystal display panel) of output reference voltage is in underloading shape
State is switched at light load in heavy duty, and reference voltage can generate surging.
In one embodiment of this invention, as shown in Figure 1, a kind of reference voltage adjusts circuit, reference voltage adjusts circuit
Including reference voltage input terminal 11, timing trigger circuit 14, switching circuit 13 and absorbing circuit 12, timing trigger circuit 14 it is defeated
Enter end to connect with sequence controller, the input terminal of switching circuit 13 is connect with reference voltage input terminal 11, switching circuit 13 by
Control end is connect with the output end of timing trigger circuit 14, and the output end of switching circuit 13 is connect with source driving chip 15, is absorbed
The input terminal of circuit 12 is connect with reference voltage input terminal 11, and the output end of absorbing circuit 12 is connect with source driving chip 15.
Wherein, the access of reference voltage input terminal 11 reference voltage, 14 incoming control signal of timing trigger circuit, and according to control
Signal processed exports corresponding driving signal, wherein the rising edge and failing edge of the detection control signal of timing trigger circuit 14, and root
According to the driving signal of rising edge and failing edge output low and high level, the control signal directly using sequence controller output is avoided
The generation for the case where caused judgement is not allowed or is mutation, so that influencing reference voltage adjusts the reference voltage that circuit is adjusted
Accuracy.It plays and reinforces the effect that reference voltage adjusts the reference voltage accuracy that circuit is adjusted.Then, switching circuit 13,
For switching circuit 13 according to driving signal ON/OFF, and when switching circuit 13 is connected, reference voltage input terminal 11 passes through switch
Circuit 13 is directly connect with source driving chip 15, thus by reference voltage output to source driving chip 15, directly to picture element
Electrode charge, centre is without by other components, and the process that voltage rises is than more gentle, therefore is not in prominent
Wave.And when switching circuit 13 turns off, heavy duty at this time is switched to underloading, at this point, reference voltage can generate surging.And reference voltage
Access between input terminal 11 and source driving chip 15 is connected by absorbing circuit 12.To which absorbing circuit 12 is in switching circuit
When 13 shutdown, the surging exported to the reference voltage of source driving chip 15 is filtered out.To filter out source level film driving chip
Reference voltage because load variation and generate abrupt voltage wave, to improve the reliability of product.
Optionally, absorbing circuit 12 includes first resistor R1 and first capacitor C1, and the first end of first resistor R1 is to absorb
The second end of the input terminal of circuit 12, first resistor R1 is connect with the first end of first capacitor C1, the electricity of first resistor R1 and first
The connecting node for holding C1 is the output end of absorbing circuit 12, the second end ground connection of first capacitor C1.
Wherein, first resistor R1 and first capacitor C1 composition RC filter circuit is switched to be switched to load in heavy duty
When circuit 13 turns off, reference voltage is filtered out because of the abrupt voltage wave that load changes and generates.It is worth noting that, first capacitor C1
Can also be when switching circuit 13 be connected, storage first switch is back to the charge of absorbing circuit 12, thus stable reference voltage,
Greatly improve the reliability and stability of product.
Optionally, absorbing circuit 12 further includes the first one-way conduction element 121, the first end of first capacitor C1 and absorb
The output end of circuit 12 only passes through the connection of the first one-way conduction element 121, and the input terminal of the first one-way conduction element 121, the
The second end of one resistance R1 and the first end interconnection of first capacitor C1, the output end of the first one-way conduction element 121 is to absorb electricity
The output end on road 12.
Wherein, the electric current that the first one-way conduction element 121 makes first switch be back to absorbing circuit 12 can not pass through, from
And ensure that not having voltage is back to reference voltage input terminal 11, the stability of the size of reference voltage is maintained, greatly
Improve the reliability and stability of product.
Optionally, the first one-way conduction element 121 includes first diode D1.
Wherein, the first one-way conduction element 121 is first diode D1 namely one-way conduction diode, can played
While hindering reflux voltage, manufacturing cost is also ad save, the difficulty of integrated products is reduced.
Optionally, switching circuit 13 includes first switch tube Q1, the grid of first switch tube Q1 be switching circuit 13 by
End is controlled, the first end of first switch tube Q1 is the input terminal of switching circuit 13, and the second end of first switch tube Q1 is switching circuit
13 output end.
Wherein, switching circuit 13 is first switch tube Q1, is controlled only with low and high level, can reduce in control process
Existing mistake, moreover, switching tube quickly can be switched and be closed, is extremely applicable in so that the overall operation of circuit is more steady
In the occasion for needing multiple charge and discharge and high-speed switch, there is preferable technical effect, also, because of the spy of switching tube itself
Property, facilitate production integrated circuit, it is easy to produce.
Optionally, first switch tube Q1 is P-MOS pipe.
Wherein, when its gate drive signal is low level L, first switch tube Q1 is opened, when its gate drive signal is
When high level H, first switch tube Q1 is closed.
Optionally, timing trigger circuit 14 includes driving signal trigger circuit 142 and reset circuit 143, driving signal touching
Power Generation Road 142 includes input terminal, input/output terminal and output end, and reset circuit 143 includes the first input/output terminal and second
The input terminal of input/output terminal, driving signal trigger circuit 142 is connect with reference voltage input terminal 11, driving signal triggering electricity
The input/output terminal on road 142, the first input/output terminal of reset circuit 143, the second input/output terminal of reset circuit 143,
The controlled end interconnection of the output end and switching circuit 13 of driving signal trigger circuit 142.
Wherein, driving signal trigger circuit 142 is according to the variation output drive signal driving switch circuit 13 for controlling signal
Switch so that control signal control result it is more accurate.Reset circuit 143 can be in driving signal trigger circuit
After 142 output drive signals, driving signal trigger circuit 142 is reset to original state, for triggering output driving letter next time
It number prepares, so that error is controlled caused by avoiding driving signal trigger circuit 142 that from can not resetting, so as to cause entire with reference to electricity
The case where voltage regulator circuit can not work normally.It greatly ensure that reference voltage adjusts the overall stability of circuit.
Optionally, driving signal trigger circuit 142 includes the first trigger J1, the first phase inverter X1 and second resistance R2,
The control signal input of first trigger J1 is the input terminal of driving signal trigger circuit 142, the assignment of the first trigger J1
The output end of signal input part, the first end of second resistance R2 and the first phase inverter X1 interconnects, second resistance R2 and the first reverse phase
The connecting node of device X1 is the output end of driving signal trigger circuit 142, the output end and the first phase inverter of the first trigger J1
The input terminal of X1 connects, the second end ground connection of second resistance R2.
Wherein, when the control signal that reference voltage input terminal 11 inputs is rising edge, the first trigger J1 believes assignment
The low level value of number input terminal is assigned to the output end of the first trigger J1, then via the reversed of the first phase inverter X1, output
High level is to switching circuit 13, to eliminate, because controlling, control signal can not be real caused by preset value is not achieved in signal voltage
The possibility applied, the technical effect with stability contorting.
Optionally, the first trigger J1 is rising edge flip-flops.
Wherein, the first trigger J1 is rising edge d type flip flop, and function is when its control signal input receives control
When the rising edge of signal, the logic level of the assertive signal input terminal of the first trigger J1 is assigned to the defeated of the first trigger J1
Outlet.To improve the accuracy of control signal judgement.
Optionally, driving signal trigger circuit 142 further includes the second one-way conduction element 141, the second one-way conduction element
141 input terminal is the input terminal of driving signal trigger circuit 142, the output end of the second one-way conduction element 141 and the first touching
The connecting node of the control signal input of hair device J1, the second one-way conduction element 141 and the first trigger J1 are driving signal
The input/output terminal of trigger circuit 142.
Wherein, the second one-way conduction element 141 makes the electric current for controlling signal that can not flow back, and does not have electricity to ensure that
It pushes back and flow to sequence controller, maintain the stability of control signal, guarantee the accuracy of control, greatly improve product
Reliability and stability.
Optionally, the second one-way conduction element 141 includes the second diode D2.
Wherein, the second one-way conduction element 141 is the second diode D2 namely one-way conduction diode, can played
While hindering reflux voltage, manufacturing cost is also ad save, the difficulty of integrated products is reduced.
Optionally, reset circuit 143 includes that the control of the second trigger J2 and the second phase inverter X2, the second trigger J2 is believed
Number input terminal is the first input/output terminal of reset circuit 143, the control signal input and the second reverse phase of the second trigger J2
The output end of device X2 connects, and the output end of the second phase inverter X2 is the first input/output terminal of reset circuit 143, the second triggering
The assertive signal input terminal of device J2 is the second input/output terminal of reset circuit 143, the output end and second of the second trigger J2
The input terminal of phase inverter X2 connects.
Wherein, when the control signal that reference voltage input terminal 11 inputs is failing edge, the second trigger J2 believes assignment
The low level value of number input terminal is assigned to the output end of the second trigger J2, then via the reversed of the second phase inverter X2, output
High level so that the first trigger J1 exports high level, then acts on, so that output to the first trigger J1 through the first phase inverter X1
Signal to switching circuit 13 is low level.To realize the reset of driving signal trigger circuit 142 to timing trigger circuit 14,
Waiting triggers next time.It greatly ensure that the stability of subsequent control.Also eliminate because control signal voltage be not achieved it is default
The possibility that signal can not be implemented, the technical effect with stability contorting are controlled caused by value.
Optionally, the second trigger J2 is failing edge trigger.
Wherein, the second trigger J2 is failing edge d type flip flop, and the control signal input of the second trigger J2 receives control
When the failing edge of signal processed, the logic level of the assertive signal input terminal of the second trigger J2 is assigned to the second trigger J2's
Output end.To improve the accuracy of control signal judgement.
Optionally, reset circuit 143 further includes pull-down circuit 1431, the input terminal and reset circuit of pull-down circuit 1431
143 the first input/output terminal connection, the output end ground connection of pull-down circuit 1431.
Wherein, pull-down circuit 1431 is grounded, and can make the assertive signal input terminal of the second trigger J2 is low level, side
Just it resets.
Optionally, pull-down circuit 1431 includes 3rd resistor R3, so that the assertive signal of the second trigger J2 inputs
The voltage at end is not zero, can be with assignment initial value, and in addition the performance of resistance is stablized, and low cost is good actuation voltage
Component.
Hereinafter, being described in detail in conjunction with Fig. 1,2,3 pairs of technical principles of the invention:
Controlling signal A is the control signal that the sequence controller on PCB generates, and timing is as shown in Figure 4.Reference voltage is defeated
Enter the first signal GMN at end 11 for the reference voltage on PCB, the second signal GMn of the first signal port output is reality output
To the reference voltage of source driving chip 15S-COF.
In original state, system work is in heavily loaded area, and the grid control signal of first switch tube Q1 is low level L at this time,
First switch tube Q1 is opened, and reference voltage input terminal 11 is connected directly to the first signal port, system worked well at this time；When being
When system switches to light loading district by heavily loaded area, signal A is controlled at this time by low level L and turns high level H, the first trigger J1 receives control
When the rising edge of signal A processed, the low level L of the assertive signal input terminal of its first trigger J1 is assigned to the first trigger J1
Output end, reversed by the first phase inverter X1 at this time, the grid control signal of first switch tube Q1 is high level H, first
Switching tube Q1 is closed, and reference voltage input terminal 11 is then connected to second signal after first resistor R1, first capacitor C1 at this time
Port.Because of the filter action of first resistor R1, first capacitor C1, it is prominent voltage caused by handoff procedure can be carried to avoid weight
Wave.
When system is converted by heavily loaded area to light loading district, signal A is controlled at this time by H and turns low level L, the second trigger J2 connects
The failing edge for receiving the A of control signal, is assigned to the second triggering for the low level L of the assertive signal input terminal of the second trigger J2
The output end of device J2, at this time by the reversed of D5, D5 output turns high level H by low level L, and the C-terminal of the first trigger J1 receives
When to the rising edge for turning high level H by low level L, the high level H of the assertive signal input terminal of the first trigger J1 is assigned to
The output end of first trigger J1, the grid control signal of first switch tube Q1 is low level L at this time, and first switch tube Q1 is opened
It opens, reference voltage input terminal 11 is connected directly to the first signal port, and D4 output is turned the failing edge of low level L by high level H
When, and the end Q of the second trigger J2 can be turned into low level L by H, system restPoses, and waiting triggers next time, comprehensive
On, reference voltage can be improved because of the abrupt voltage wave that load changes and generates, to promote product reliability.
To achieve the above object, the present invention also proposes a kind of driving circuit of display panel, as shown in figure 3, display panel
Driving circuit include that sequence controller source driving chip and reference voltage as described above adjust circuit, sequence controller
It is connect with source driving chip 15, reference voltage adjusts the output end of circuit and the reference voltage input terminal of source driving chip 15
Connection, the output end of source driving chip 15 and the pixel electrode of liquid crystal display panel connect.
It is understood that due to having used above-mentioned reference voltage to adjust electricity in the driving circuit the invention shows panel
Road, therefore, the embodiment the invention shows the driving circuit of panel include that above-mentioned reference voltage adjusts circuit whole embodiments
Whole technical solutions, technical effect achieved is also identical, and details are not described herein.
Optionally, the driving circuit of display panel further includes the integrated electricity of public electrode circuit, gamma circuit and turntable driving
Road, sequence controller are connect with source driving chip 15 and grid drive chip respectively, the output end and reference electricity of gamma circuit
The input terminal of voltage regulator circuit connects, and the reference voltage of output end and source driving chip 15 that reference voltage adjusts circuit inputs
11 connection of end, public electrode circuit are connect with the reference input of liquid crystal display panel exchange driving, source driving chip 15
The connection of the pixel electrode of output end and liquid crystal display panel, the TFT of turntable driving integrated circuit and the liquid crystal display panel
The connection of (Thin Film Transistor, thin film transistor (TFT)) array.
Wherein, public electrode circuit (VCOMCircuit) reference voltage that the LCD alternating-current of liquid crystal in display panel drives is provided,
Gamma circuit Gamma circuit generates reference voltage.Turntable driving integrated circuit (G-IC) is for driving liquid crystal molecule to rotate, specifically
Circuit realizes that details are not described herein referring to general liquid crystal display panel drive circuit.
To achieve the above object, the present invention also proposes a kind of display device, including display panel and display as described above
The driving circuit of panel.
In the various embodiments described above, display panel includes but is not limited to liquid crystal display panel, organic light-emitting diode display face
Plate, field emission display panel, Plasmia indicating panel, curved face type panel, the liquid crystal display panel include that tft liquid crystal is aobvious
Show panel, TN panel, VA class panel, IPS panel etc..
It is understood that the driving circuit due to having used above-mentioned display panel in the display device of that present invention,
The embodiment of the display device of that present invention includes whole technical solutions of the driving circuit whole embodiments of above-mentioned display panel, is reached
The technical effect arrived is also identical, and details are not described herein.
The above is only a preferred embodiment of the present invention, is not intended to limit the scope of the invention, all in the present invention
Inventive concept under, using equivalent structure transformation made by description of the invention and accompanying drawing content, or directly/be used in it indirectly
He is included in scope of patent protection of the invention relevant technical field.
Claims (10)
1. a kind of reference voltage adjusts circuit, which is characterized in that the reference voltage adjusts circuit and includes:
Reference voltage input terminal is set as access reference voltage；
The input terminal of timing trigger circuit, the timing trigger circuit is connect with sequence controller, and the timing trigger circuit is set
It is set to incoming control signal, and corresponding driving signal is exported according to control signal；
Switching circuit, the input terminal of the switching circuit are connect with the reference voltage input terminal, the switching circuit it is controlled
End is connect with the output end of the timing trigger circuit, and the output end of the switching circuit is connect with source driving chip, described
Switching circuit is set as according to the driving signal ON/OFF, and in switching circuit conducting, by the reference voltage
It exports to the source driving chip；
Absorbing circuit, the input terminal of the absorbing circuit are connect with the reference voltage input terminal, the output of the absorbing circuit
End is connect with the source driving chip, and the absorbing circuit is set as filtering out output to the source when switching circuit turns off
The surging of the reference voltage of pole driving chip.
2. reference voltage as described in claim 1 adjusts circuit, which is characterized in that the absorbing circuit include first resistor and
First capacitor, the first end of the first resistor are the input terminal of the absorbing circuit, the second end of the first resistor and institute
The first end for stating first capacitor connects, and the connecting node of the first resistor and the first capacitor is the defeated of the absorbing circuit
Outlet, the second end ground connection of the first capacitor.
3. reference voltage as claimed in claim 2 adjusts circuit, which is characterized in that the absorbing circuit further includes first unidirectional
Breakover element, the output end of the first end of the first capacitor the and described absorbing circuit only pass through the first one-way conduction member
Part connection, and the of the input terminal of the first one-way conduction element, the second end of the first resistor and the first capacitor
One end interconnection, the output end of the first one-way conduction element are the output end of the absorbing circuit.
4. reference voltage as described in claim 1 adjusts circuit, which is characterized in that the switching circuit includes first switch
Pipe, the grid of the first switch tube are the controlled end of the switching circuit, and the first end of the first switch tube is described opens
The input terminal on powered-down road, the second end of the first switch tube are the output end of the switching circuit.
5. reference voltage according to any one of claims 1-4 adjusts circuit, which is characterized in that the timing trigger circuit packet
Driving signal trigger circuit and reset circuit are included, the driving signal trigger circuit includes input terminal, input/output terminal and output
End, the reset circuit include the first input/output terminal and the second input/output terminal, the driving signal trigger circuit it is defeated
Enter end to connect with the reference voltage input terminal, the input/output terminal of the driving signal trigger circuit, the reset circuit
First input/output terminal, the second input/output terminal of the reset circuit, the driving signal trigger circuit output end and
The controlled end of the switching circuit interconnects.
6. reference voltage as claimed in claim 5 adjusts circuit, which is characterized in that the driving signal trigger circuit includes the
One trigger, the first phase inverter and second resistance, the control signal input of first trigger are driving signal touching
The input terminal of Power Generation Road, the assertive signal input terminal of first trigger, the first end of the second resistance and described first
The output end of phase inverter interconnects, and the connecting node of the second resistance and first phase inverter is driving signal triggering electricity
The output end on road, the output end of first trigger are connect with the input terminal of first phase inverter；The second resistance
Second end ground connection.
7. reference voltage as claimed in claim 5 adjusts circuit, which is characterized in that the driving signal trigger circuit further includes
Second one-way conduction element, the input terminal of the second one-way conduction element are the input terminal of the driving signal trigger circuit,
The control signal input of the output end of the second one-way conduction element and first trigger, second one-way conduction
The connecting node of first trigger described in element is the input/output terminal of the driving signal trigger circuit.
8. reference voltage as claimed in claim 5 adjusts circuit, which is characterized in that the reset circuit includes the second trigger
With the second phase inverter, the control signal input of second trigger is the first input/output terminal of the reset circuit, institute
The control signal input for stating the second trigger is connect with the output end of second phase inverter, the output of second phase inverter
End is the first input/output terminal of the reset circuit, and the assertive signal input terminal of second trigger is the reset electricity
Second input/output terminal on road, the output end of second trigger are connect with the input terminal of second phase inverter.
9. a kind of driving circuit of display panel, which is characterized in that including sequence controller source driving chip and such as right
It is required that the described in any item reference voltages of 1-8 adjust circuit, the sequence controller is connect with the source driving chip, described
The output end that reference voltage adjusts circuit is connect with the reference voltage input terminal of the source driving chip, the source drive core
The output end of piece is connect with the pixel electrode of the liquid crystal display panel.
10. a kind of display device, which is characterized in that the driving including display panel and display panel as claimed in claim 9
Circuit.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811561444.7A CN109509450B (en) | 2018-12-19 | 2018-12-19 | Reference voltage regulating circuit, driving circuit of display panel and display device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811561444.7A CN109509450B (en) | 2018-12-19 | 2018-12-19 | Reference voltage regulating circuit, driving circuit of display panel and display device |
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| CN109509450B CN109509450B (en) | 2021-05-14 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118968944A (en) * | 2024-10-17 | 2024-11-15 | 惠科股份有限公司 | Driving circuit, driving method and display device |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101191956A (en) * | 2006-11-28 | 2008-06-04 | 立锜科技股份有限公司 | Backlight Control Circuit |
| CN202363082U (en) * | 2011-11-22 | 2012-08-01 | 中航华东光电有限公司 | CCFL backlight drive circuit with high contrast |
| CN203387741U (en) * | 2013-08-07 | 2014-01-08 | 深圳市明微电子股份有限公司 | LED display device, LED drive chip and LED drive circuit of LED drive chip |
| CN104464673A (en) * | 2014-12-22 | 2015-03-25 | 南京中电熊猫液晶显示科技有限公司 | Display device and control method and control circuit thereof |
| CN106230246A (en) * | 2016-09-22 | 2016-12-14 | 京东方科技集团股份有限公司 | A kind of circuit and Switching Power Supply and liquid crystal display drive circuit |
| CN207587350U (en) * | 2017-09-26 | 2018-07-06 | 深圳市施乐迅电子科技有限公司 | A kind of liquid crystal display power driving circuit |
-
2018
- 2018-12-19 CN CN201811561444.7A patent/CN109509450B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101191956A (en) * | 2006-11-28 | 2008-06-04 | 立锜科技股份有限公司 | Backlight Control Circuit |
| CN202363082U (en) * | 2011-11-22 | 2012-08-01 | 中航华东光电有限公司 | CCFL backlight drive circuit with high contrast |
| CN203387741U (en) * | 2013-08-07 | 2014-01-08 | 深圳市明微电子股份有限公司 | LED display device, LED drive chip and LED drive circuit of LED drive chip |
| CN104464673A (en) * | 2014-12-22 | 2015-03-25 | 南京中电熊猫液晶显示科技有限公司 | Display device and control method and control circuit thereof |
| CN106230246A (en) * | 2016-09-22 | 2016-12-14 | 京东方科技集团股份有限公司 | A kind of circuit and Switching Power Supply and liquid crystal display drive circuit |
| CN207587350U (en) * | 2017-09-26 | 2018-07-06 | 深圳市施乐迅电子科技有限公司 | A kind of liquid crystal display power driving circuit |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118968944A (en) * | 2024-10-17 | 2024-11-15 | 惠科股份有限公司 | Driving circuit, driving method and display device |
| CN118968944B (en) * | 2024-10-17 | 2025-02-11 | 惠科股份有限公司 | Driving circuit, driving method and display device |
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| Publication number | Publication date |
|---|---|
| CN109509450B (en) | 2021-05-14 |
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