CN109410878A - A kind of driving circuit, driving device and display device - Google Patents
A kind of driving circuit, driving device and display device Download PDFInfo
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- CN109410878A CN109410878A CN201811547518.1A CN201811547518A CN109410878A CN 109410878 A CN109410878 A CN 109410878A CN 201811547518 A CN201811547518 A CN 201811547518A CN 109410878 A CN109410878 A CN 109410878A
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- 238000000465 moulding Methods 0.000 claims 1
- 230000002159 abnormal effect Effects 0.000 abstract description 9
- 238000005516 engineering process Methods 0.000 abstract description 2
- 239000010409 thin film Substances 0.000 description 15
- 230000005611 electricity Effects 0.000 description 11
- 239000010408 film Substances 0.000 description 11
- 239000004065 semiconductor Substances 0.000 description 8
- 238000000034 method Methods 0.000 description 7
- 238000010586 diagram Methods 0.000 description 6
- 239000004973 liquid crystal related substance Substances 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000002096 quantum dot Substances 0.000 description 2
- 239000000686 essence Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Classifications
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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
- G09G3/3648—Control of matrices with row and column drivers using an active matrix
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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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- 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)
- Electronic Switches (AREA)
Abstract
The embodiment of the present application belongs to field of display technology, provide a kind of driving circuit, driving device and display device, the drive voltage signal is compared with threshold voltage by comparing module, and export corresponding first control signal, first switch module controls the conducting or shutdown of cut-in voltage signal according to the first control signal, second switch module controls the conducting or shutdown for closing voltage signal according to the first control signal, third switch module selects the first output end or second output terminal to export the drive voltage signal according to first control signal, the third control signal for second control signal and third the comparison module output that 4th switch module is exported according to the second comparison module controls the turn-on and turn-off of the voltage source signal, so that turning off the output of voltage source signal in panel when abnormal signal in time, it keeps away The problem of exempting from grid film driving chip operation irregularity, leading to circuit burnout.
Description
Technical field
The embodiment of the present application belongs to field of display technology more particularly to a kind of driving circuit, driving device and display dress
It sets.
Background technique
Thin Film Transistor-LCD (Thin Film Transistor Liquid Crystal Display,
TFT-LCD in), R/G/B compressed signal, control signal and power supply signal are passed through wire rod and printed circuit board by system board
Connector on (Printed Circuit Board, PCB) is connected, then video data by printed circuit board when
After sequence controller (Timing Controller, TCON) chip processing, by printed circuit board, core is driven by source level film
Piece (Source-Chip on Film, S-COF) and grid film driving chip (Gate-Chip on Film, G-COF) and face
The viewing area of plate connects, so that liquid crystal display obtains required power supply signal.
However, abnormal signal may be caused due to entering foreign matter in panel in production, use process, so as to cause
Grid film driving chip operation irregularity.
Summary of the invention
The embodiment of the present application provides a kind of driving circuit, driving device and display device, it is intended to solve in production, use
In the process, abnormal signal may be caused due to entering foreign matter in panel, so as to cause grid film driving chip operation irregularity
The problem of.
The embodiment of the present application provides a kind of driving circuit, with driving voltage source, threshold voltage source, cut-in voltage signal source
And close voltage signal source connection, comprising:
First comparison module is connect with the driving voltage source and the threshold voltage source, for receiving driving voltage letter
Number, and the drive voltage signal is compared with threshold voltage, and export corresponding first control signal；
First switch module is connect with the cut-in voltage signal source and first comparison module, is opened for receiving
Voltage signal and the first control signal, and according to the first control signal control the cut-in voltage signal conducting or
Person's shutdown；
Second switch module is connect with the closing voltage signal source and first comparison module, is closed for receiving
Voltage signal and the first control signal, and according to the first control signal control it is described close voltage signal conducting or
Person's shutdown；
Third switch module is connect with the driving voltage source and first comparison module, the third switch module
Including the first output end and second output terminal, the third switch module is for receiving the drive voltage signal and described first
Signal is controlled, and selects first output end or the second output terminal to export the driving according to the first control signal
Voltage signal；
Second comparison module is connect with the first output end of the first switch module and the third switch module, is used
In the driving electricity that the first output end of the voltage signal and the third switch module for exporting the first switch module exports
Pressure signal is compared, and exports corresponding second control signal；
Third comparison module is connect with the second output terminal of the second switch module and the third switch module, is used
In the driving electricity that the second output terminal for the voltage signal and the third switch module for exporting the second switch module exports
Pressure signal is compared, and exports corresponding third control signal；And
4th switch module is connect with supply voltage source, second comparison module and the third comparison module, is used
Signal is controlled in receiving voltage source signal, the second control signal and the third, and according to the second control signal
The turn-on and turn-off of the voltage source signal are controlled with third control signal.
Optionally, first comparison module includes first comparator, the first input end conduct of the first comparator
The first input end of first comparison module is connect with the driving voltage source, and the second input terminal of the first comparator is made
The second input terminal for first comparison module is connect with threshold voltage source, described in the output end conduct of the first comparator
The output end of first comparison module.
Optionally, the first switch module includes the first electronic switching tube, and the electric current of first electronic switching tube is defeated
The input terminal for entering end as the first switch module is connect with the cut-in voltage signal source, first electronic switching tube
Current output terminal is connect as the output end of the first switch module with the first input end of second comparison module, described
The control terminal of first electronic switching tube is as the control terminal of the first switch module and the output end of first comparison module
Connection.
Optionally, the second switch module includes the second electronic switching tube, and the electric current of second electronic switching tube is defeated
The input terminal for entering end as the second switch module is connect with the closing voltage signal source, second electronic switching tube
Current output terminal is connect as the output end of the second switch module with the first input end of the third comparison module, described
The control terminal of second electronic switching tube is as the control terminal of the second switch module and the output end of first comparison module
Connection.
Optionally, the third switch module includes:
5th electronic switching tube, the current output terminal of the 5th electronic switching tube as the third switch module
One output end is connect with the second input terminal of second comparison module；And
6th electronic switching tube, the current input terminal of the 6th electronic switching tube and the electricity of the 5th electronic switching tube
The drive voltage signal input terminal that stream input terminal is connected to the third switch module is connect with the driving voltage source, described
The control terminal of 6th electronic switching tube and the control terminal of the 5th electronic switching tube are connected to the control of the third switch module
Signal input part is connect with the output end of first comparison module, and the current output terminal of the 6th electronic switching tube is as institute
The second output terminal for stating third switch module is connect with the second input terminal of the third comparison module.
Optionally, second comparison module includes the second comparator, the first input end conduct of second comparator
The first input end of second comparison module is connect with the output end of the first switch module, and the of second comparator
Two input terminals are connect as the second input terminal of second comparison module with the first output end of the third switch module, institute
The output end for stating the second comparator is controlled as the output end of second comparison module and the first of the 4th switch module
Signal input part connection.
Optionally, the third comparison module includes third comparator, the first input end conduct of the third comparator
The first input end of the third comparison module is connect with the output end of the second switch module, and the of the third comparator
Two input terminals are connect as the second input terminal of the third comparison module with the second output terminal of the third switch module, institute
The output end for stating third comparator is controlled as the output end of the third comparison module and the second of the 4th switch module
Signal input part connection.
Optionally, the 4th switch module includes:
Third electronic switching tube, the current input terminal of the third electronic switching tube is as the defeated of the 4th switch module
Enter end connect with the supply voltage source, the control terminal of the third electronic switching tube as the 4th switch module first
Control signal input is connect with the output end of second comparison module；
4th electronic switching tube, the current input terminal of the 4th electronic switching tube and the electricity of the third electronic switching tube
Output end connection is flowed, the control terminal of the 4th electronic switching tube is inputted as the second control signal of the 4th switch module
End is connect with the output end of the third comparison module, and the current output terminal of the 4th electronic switching tube is opened as the described 4th
Close the output end of module.
The embodiment of the present application also provides a kind of driving device, the driving device includes:
Driving voltage source；
Threshold voltage source；
Cut-in voltage signal source；
Close voltage signal source；And
Driving circuit described in any of the above-described embodiment, the driving circuit respectively with the driving voltage source, described
Threshold voltage source, the cut-in voltage signal source and closing voltage signal source connection.
Another embodiment of the application also provides a kind of display device, comprising:
Display panel；And
Control unit, described control unit include driving circuit described in any of the above embodiments.
The embodiment of the present application provides a kind of driving circuit, driving device and display device, by comparing module to institute
It states drive voltage signal to be compared with threshold voltage, and exports corresponding first control signal, first switch module is according to institute
The conducting or shutdown of first control signal control cut-in voltage signal are stated, second switch module is according to the first control signal
The conducting or shutdown of voltage signal are closed in control, and third switch module selects the first output end or the according to first control signal
Two output ends export the drive voltage signal, the second control signal that the 4th switch module export according to the second comparison module with
The third control signal of third comparison module output controls the turn-on and turn-off of the voltage source signal, so that signal in panel
The output for turning off voltage source signal when abnormal in time avoids grid film driving chip operation irregularity, leads to asking for circuit burnout
Topic.
Detailed description of the invention
In order to more clearly explain the technical solutions in the embodiments of the present application, make required in being described below to embodiment
Attached drawing is briefly described, it should be apparent that, the accompanying drawings in the following description is some embodiments of the present application, for ability
For the those of ordinary skill of domain, without creative efforts, it can also be obtained according to these attached drawings other attached
Figure.
Fig. 1 is the structural schematic diagram for the driving circuit that one embodiment of the application provides；
Fig. 2 is the structural schematic diagram for the driving circuit that another embodiment of the application provides；
Fig. 3 is the structural schematic diagram for the display device that one embodiment of the application provides.
Specific embodiment
In order to make those skilled in the art more fully understand application scheme, below in conjunction in the embodiment of the present application
Attached drawing, technical solutions in the embodiments of the present application are explicitly described, it is clear that described embodiment is the application one
The embodiment divided, instead of all the embodiments.Based on the embodiment in the application, those of ordinary skill in the art are not doing
Every other embodiment obtained under the premise of creative work out, shall fall within the protection scope of the present application.
The description and claims of this application and term " includes " and their any deformations in above-mentioned attached drawing, meaning
Figure, which is to cover, non-exclusive includes.Such as process, method or system comprising a series of steps or units, product or equipment do not have
It is defined in listed step or unit, but optionally further comprising the step of not listing or unit, or optionally also wrap
Include the other step or units intrinsic for these process, methods, product or equipment.In addition, term " first ", " second " and
" third " etc. is for distinguishing different objects, not for description particular order.
Fig. 1 is the structural schematic diagram for the driving circuit that one embodiment of the application provides.
As shown in Figure 1, the driving circuit in the present embodiment, believes with driving voltage source 31, threshold voltage source 32, cut-in voltage
It number source 33 and closes voltage signal source 34 and connects, comprising:
First comparison module 11, and driving voltage, 31 and threshold voltage source 32 connect, for receiving drive voltage signal,
And drive voltage signal is compared with threshold voltage, and export corresponding first control signal；
First switch module 21 is connect with cut-in voltage signal source 33 and the first comparison module 11, opens electricity for receiving
Signal and first control signal are pressed, and controls the conducting or shutdown of cut-in voltage signal according to first control signal；
Second switch module 22 is connect with closing voltage signal source 34 and the first comparison module 11, closes electricity for receiving
Signal and first control signal are pressed, and controls the conducting or shutdown for closing voltage signal according to first control signal；
Third switch module 23, connect with driving voltage source 31 and the first comparison module 11, and third switch module 23 includes
First output end and second output terminal, third switch module 23 is for receiving drive voltage signal and first control signal, and root
The first output end or second output terminal outputting drive voltage signal are selected according to first control signal；
Second comparison module 12 connect with the first output end of first switch module 21 and third switch module 23, is used for
The drive voltage signal of the first output end output of voltage signal and third switch module 23 that first switch module 21 is exported
It is compared, and exports corresponding second control signal；
Third comparison module 13 connect with the second output terminal of second switch module 22 and third switch module 23, is used for
The drive voltage signal of the second output terminal output of voltage signal and third switch module 23 that second switch module 22 is exported
It is compared, and exports corresponding third control signal；And
4th switch module 24 is connect with supply voltage source 35, the second comparison module 12 and third comparison module 13, is used
Signal is controlled in receiving voltage source signal, second control signal and third, and according to second control signal and third control letter
Number control voltage source signal turn-on and turn-off.
In one embodiment, power management chip as supply voltage source 35, believe by the power supply that supply voltage source 35 exports
Number voltage be VDD.
In one embodiment, the signal conduct that last line scan line exports in grid film driving chip (G-COF)
Driving voltage source 31, the voltage for the driving signal that driving voltage source 31 exports are V1.
In one embodiment, the cut-in voltage signal that cut-in voltage signal source 33 exports is VGH, closes voltage signal source
The closing voltage signal of 34 outputs is VGL, i.e. the voltage VGH of cut-in voltage signal opens electricity as the grid on printed circuit board
Pressure, closes the voltage VGL of voltage signal as the gate off voltage on printed circuit board.
In one embodiment, in normal work, the voltage of the high-voltage signal of output is grid film driving chip
VGH, the voltage of the low-voltage signal of output are VGL.
In one embodiment, threshold voltage source 32 can according to user setting reference voltage, specifically, threshold value is electric
The threshold voltage of potential source 32 can be specifically arranged according to the needs of users, in the present embodiment the threshold voltage of threshold voltage source 32
It can be indicated with GND.
In one embodiment, the first input end of the first comparison module 11 and the voltage signal of the second input terminal are identical
When, the first control signal of the first comparison module 11 output is low level, the voltage of the first input end of the first comparison module 11
Signal be greater than the second input terminal voltage signal when, the first comparison module 11 output first control signal be high level, first
The voltage signal of the first input end of comparison module 11 less than the second input terminal voltage signal when, the first comparison module 11 output
First control signal be high level.
In one embodiment, the first input end of the second comparison module 12 and the voltage signal of the second input terminal are identical
When, the second control signal of the second comparison module 12 output is low level, the voltage of the first input end of the second comparison module 12
Signal be greater than the second input terminal voltage signal when, the second comparison module 12 output second control signal be high level, second
The voltage signal of the first input end of comparison module 12 less than the second input terminal voltage signal when, the second comparison module 12 output
Second control signal be high level.
In one embodiment, the voltage signal of the first input end of third comparison module 13 and the second input terminal is identical
When, the third control signal that third comparison module 13 exports is low level, the voltage of the first input end of third comparison module 13
When signal is greater than the voltage signal of the second input terminal, the third control signal that third comparison module 13 exports is high level, third
The voltage signal of the first input end of comparison module 13 less than the second input terminal voltage signal when, third comparison module 13 export
Third control signal be high level.
In one embodiment, when the system is operating, the drive voltage signal V1 that driving voltage source 31 exports is high level
When, the voltage of drive voltage signal is greater than threshold voltage GND at this time, and the first comparison module 11 exports high level, at this point, first opens
Module 21 is closed to open, the first output end of third switch module 23 is set as signal output end, and the first of third switch module 23
Output end outputting drive voltage signal V1, the second efferent duct shutdown of third switch module 23, therefore, third comparison module 13
Second input terminal is hanging, and since second switch module 22 is also off state, the first input end of third comparison module 13 is also
Vacant state, at this point, the third control signal that third comparison module 13 exports is low level.When the drive that driving voltage source 31 exports
When dynamic voltage signal V1 is normal, V1=VGH, the electricity of the cut-in voltage signal of the first input end input of the second comparison module 12
Pressure is equal to the drive voltage signal of the second input terminal input, at this point, the second control signal of the second comparison module 12 output is low
Level, at this point, the 4th switch module 24 is connected according to second control signal and third control signal control voltage source signal, system
It works normally.
In one embodiment, when system operation irregularity, the drive voltage signal V1 that driving voltage source 31 exports is less than
Cut-in voltage signal VGH, at this point, the second control signal of the second comparison module 12 output is high level, the 4th switch module 24
According to second control signal and third control signal control voltage source signal control voltage source signal shutdown, at this point, supply voltage
Source 35 stops output voltage source signal, avoids back-end circuit and breaks down because input signal is abnormal.
In one embodiment, when the system is operating, the drive voltage signal V1 that driving voltage source 31 exports is low level
When, at this point, the voltage V1 of drive voltage signal V1 is less than threshold voltage GND, the first comparison module 11 exports low level, and first opens
It closes module 21 to close, the second output terminal of third switch module 23 as signal output end, open by second switch module 22, works as drive
When the drive voltage signal V1 that dynamic voltage source 31 exports is normal, V1=GND, the second input terminal input of the second comparison module 12
Closing voltage signal voltage be equal to the second input terminal input drive voltage signal, at this point, the second comparison module 12 export
Second control signal be low level, at this point, the 4th switch module 24 according to second control signal and third control signal control
Voltage source signal conducting, system worked well.
In one embodiment, when system operation irregularity, the drive voltage signal V1 that driving voltage source 31 exports is less than
Voltage signal VGH is closed, at this point, the second control signal of the second comparison module 12 output is high level, the 4th switch module 24
According to second control signal and third control signal control voltage source signal control voltage source signal shutdown, at this point, supply voltage
Source 35 stops output voltage source signal, avoids back-end circuit and breaks down because input signal is abnormal.
In one embodiment, supply voltage source 35 is set as being powered driving voltage source 31.
In one embodiment, driving voltage source 31 be grid thin film chip, the voltage that grid thin film chip is exported with
Preset normal voltage is compared, the voltage which can export for threshold voltage source 32, usual panel
The output voltage that will appear grid thin film chip when interior generation shorted to earth or impedance less than normal is abnormal, therefore, discontented
When sufficient normal voltage, the supply input of control the 4th switch module 24 shutdown grid thin film chip avoids entering foreign matter in panel
Cause to burn.
In one embodiment, the drive voltage signal of grid thin film chip output is set as opening thin in display panel
Film transistor, the drive voltage signal can be set to open the high level of thin film transistor (TFT) or close the low of thin film transistor (TFT)
Level to realize being switched on or off for thin film transistor (TFT), meet the high level being switched on or off for realizing thin film transistor (TFT) and
Low level voltage range is larger, and the fluctuation of the voltage of usually grid thin film chip output also will appear predictive of panel itself
It is abnormal, it therefore, is detected by the voltage exported to grid thin film chip, and discontented in the voltage of grid thin film chip output
When sufficient normal voltage, the supply input of control the 4th switch module 24 shutdown grid thin film chip avoids occurring in display panel
Short circuit or resistance appearance less than normal exception.
Fig. 2 is the structural schematic diagram for the driving circuit that another embodiment of the application provides.
Referring to fig. 2, in one embodiment, the first comparison module 11 includes first comparator D1, first comparator D1's
First input end is connect as the first input end of the first comparison module 11 with driving voltage source 31, and the second of first comparator D1
Input terminal is connect as the second input terminal of the first comparison module 11 with threshold voltage source 32, and the output end of first comparator D1 is made
For the output end of the first comparison module 11.
In one embodiment, first comparator D1 is voltage comparator, and the first input end of first comparator D1 is electricity
The electrode input end of comparator is pressed, the second input terminal of first comparator D1 is the negative input of voltage comparator.
Referring to fig. 2, in one embodiment, first switch module 21 includes the first electronic switching tube M1, the first electronic cutting
The current input terminal for closing pipe M1 is connect as the input terminal of first switch module 21 with cut-in voltage signal source 33, the first electronic cutting
The current output terminal for closing pipe M1 is connect as the output end of first switch module 21 with the first input end of the second comparison module 12,
The control terminal of first electronic switching tube M1 connects as the control terminal of first switch module 21 and the output end of the first comparison module 11
It connects.
Referring to fig. 2, in one embodiment, second switch module 22 includes the second electronic switching tube M2, the second electronic cutting
The current input terminal for closing pipe M2 is connect as the input terminal of second switch module 22 with voltage signal source 34 is closed, the second electronic cutting
The current output terminal for closing pipe M2 is connect as the output end of second switch module 22 with the first input end of third comparison module 13,
The control terminal of second electronic switching tube M2 connects as the control terminal of second switch module 22 and the output end of the first comparison module 11
It connects.
Referring to fig. 2, in one embodiment, third switch module 23 includes:
5th electronic switching tube M5, the current output terminal of the 5th electronic switching tube M5 as third switch module 23 first
Output end is connect with the second input terminal of the second comparison module 12；And
6th electronic switching tube M6, the current input terminal of the 6th electronic switching tube M6 and the electric current of the 5th electronic switching tube M5
The drive voltage signal input terminal that input terminal is connected to third switch module 23 is connect with driving voltage source 31, the 6th electronic cutting
The control signal that the control terminal of the control terminal and the 5th electronic switching tube M5 of closing pipe M6 is connected to third switch module 23 inputs
End is connect with the output end of the first comparison module 11, and the current output terminal of the 6th electronic switching tube M6 is as third switch module 23
Second output terminal connect with the second input terminal of third comparison module 13.
Referring to fig. 2, in one embodiment, the second comparison module 12 includes the second comparator D2, the second comparator D2's
First input end is connect as the first input end of the second comparison module 12 with the output end of first switch module 21, and second compares
The second input terminal of device D2 connects as the second input terminal of the second comparison module 12 and the first output end of third switch module 23
It connects, the output end of the second comparator 12 is believed as the first control of the output end and the 4th switch module 24 of the second comparison module 12
The connection of number input terminal.
Referring to fig. 2, in one embodiment, third comparison module 13 includes third comparator D3, third comparator D3's
First input end is connect as the first input end of third comparison module 13 with the output end of second switch module 23, and third compares
The second input terminal of device D3 connects as the second input terminal of third comparison module 13 and the second output terminal of third switch module 23
It connects, the output end of third comparator D3 is believed as the second control of the output end and the 4th switch module 24 of third comparison module 13
The connection of number input terminal.
Referring to fig. 2, in one embodiment, the 4th switch module 24 includes:
Third electronic switching tube M3, input of the current input terminal of third electronic switching tube M3 as the 4th switch module 24
End is connect with supply voltage source 35, first control signal of the control terminal of third electronic switching tube M3 as the 4th switch module 24
Input terminal is connect with the output end of the second comparison module 12；
The current input terminal of 4th electronic switching tube M4, the 4th electronic switching tube M4 and the electric current of third electronic switching tube M3
Output end connection, the control terminal of the 4th electronic switching tube M4 is as the second control signal input terminal of the 4th switch module 24 and the
The output end of three comparison modules 13 connects, output of the current output terminal of the 4th electronic switching tube M4 as the 4th switch module 24
End.
In one embodiment, the first electronic switching tube M1 and the 5th electronic switching tube M5 is N-type metal-oxide-semiconductor, N-type metal-oxide-semiconductor
Current input terminal of the drain electrode as the first electronic switching tube M1 and the 5th electronic switching tube M5, the grid of N-type metal-oxide-semiconductor is as the
The control terminal of one electronic switching tube M1 and the 5th electronic switching tube M5, the source electrode of N-type metal-oxide-semiconductor as the first electronic switching tube M1 and
The current output terminal of 5th electronic switching tube M5.
In one embodiment, the second electronic switching tube M2, third electronic switching tube M3, the 4th electronic switching tube M4 and
6th electronic switching tube M6 is p-type metal-oxide-semiconductor, and the drain electrode of p-type metal-oxide-semiconductor is as the second electronic switching tube M2, third electronic switching tube
The current output terminal of M3, the 4th electronic switching tube M4 and the 6th electronic switching tube M6, the grid of p-type metal-oxide-semiconductor is as the second electricity
The control terminal of sub switch pipe M2, third electronic switching tube M3, the 4th electronic switching tube M4 and the 6th electronic switching tube M6, p-type
The source electrode of metal-oxide-semiconductor is as the second electronic switching tube M2, third electronic switching tube M3, the 4th electronic switching tube M4 and the 6th electronics
The current input terminal of switching tube M6.
One embodiment of the application additionally provides a kind of driving device, and driving device includes:
Driving voltage source 31；
Threshold voltage source 32；
Cut-in voltage signal source 33；
Close voltage signal source 34；And
The driving circuit of any of the above-described embodiment, driving circuit respectively with driving voltage source 31, threshold voltage source 32, open
It opens voltage signal source 33 and closes voltage signal source 34 and connect.
Fig. 3 is the structural schematic diagram for the display device that one embodiment of the application provides.
As shown in figure 3, the display device in the present embodiment, comprising:
Display panel 60；And
Control unit 61, wherein control unit 61 includes the driving circuit 610 such as any of the above-described.
In one embodiment, display device 60 can be to be provided with any type of display of above-mentioned driving circuit 610
Device, such as liquid crystal display device (Liquid Crystal Display, LCD), Organic Electricity laser display (Organic
Electroluminesence Display, OLED) display device, light emitting diode with quantum dots (Quantum Dot Light
Emitting Diodes, QLED) display device or curved-surface display device etc..
In one embodiment, display panel 62 includes the pixel array being made of multirow pixel and multiple row pixel.
In one embodiment, control unit 61 can pass through universal integrated circuit, such as central processing unit (Central
Processing Unit, CPU), or pass through specific integrated circuit (Application Specific Integrated
Circuit, ASIC) Lai Shixian.
The embodiment of the present application provides a kind of driving circuit, driving device and display device, by comparing module to institute
It states drive voltage signal to be compared with threshold voltage, and exports corresponding first control signal, first switch module is according to institute
The conducting or shutdown of first control signal control cut-in voltage signal are stated, second switch module is according to the first control signal
The conducting or shutdown of voltage signal are closed in control, and third switch module selects the first output end or the according to first control signal
Two output ends export the drive voltage signal, the second control signal that the 4th switch module export according to the second comparison module with
The third control signal of third comparison module output controls the turn-on and turn-off of the voltage source signal, so that signal in panel
The output for turning off voltage source signal when abnormal in time avoids grid film driving chip operation irregularity, leads to asking for circuit burnout
Topic.
The foregoing is merely the preferred embodiments of the application, not to limit the application, all essences in the application
Made any modifications, equivalent replacements, and improvements etc., should be included within the scope of protection of this application within mind and principle.
Claims (10)
1. a kind of driving circuit connects with driving voltage source, threshold voltage source, cut-in voltage signal source and closing voltage signal source
It connects characterized by comprising
First comparison module is connect with the driving voltage source and the threshold voltage source, for receiving drive voltage signal, and
The drive voltage signal is compared with threshold voltage, and exports corresponding first control signal；
First switch module is connect, for receiving cut-in voltage with the cut-in voltage signal source and first comparison module
Signal and the first control signal, and control according to the first control signal conducting or the pass of the cut-in voltage signal
It is disconnected；
Second switch module is connect with the closing voltage signal source and first comparison module, closes voltage for receiving
Signal and the first control signal, and the conducting for closing voltage signal or pass are controlled according to the first control signal
It is disconnected；
Third switch module is connect with the driving voltage source and first comparison module, and the third switch module includes
First output end and second output terminal, the third switch module is for receiving the drive voltage signal and first control
Signal, and select first output end or the second output terminal to export the driving voltage according to the first control signal
Signal；
Second comparison module is connect with the first output end of the first switch module and the third switch module, and being used for will
The driving voltage letter of the first output end output of the voltage signal and the third switch module of the first switch module output
It number is compared, and exports corresponding second control signal；
Third comparison module is connect with the second output terminal of the second switch module and the third switch module, and being used for will
The driving voltage letter of the second output terminal output of the voltage signal and the third switch module of the second switch module output
It number is compared, and exports corresponding third control signal；And
4th switch module is connect, for connecing with supply voltage source, second comparison module and the third comparison module
It receives voltage source signal, the second control signal and the third and controls signal, and according to the second control signal and institute
State the turn-on and turn-off that third control signal controls the voltage source signal.
2. driving circuit as described in claim 1, which is characterized in that first comparison module includes first comparator, institute
The first input end for stating first comparator is connect as the first input end of first comparison module with the driving voltage source,
Second input terminal of the first comparator is connect as the second input terminal of first comparison module with threshold voltage source, institute
State output end of the output end of first comparator as first comparison module.
3. driving circuit as described in claim 1, which is characterized in that the first switch module includes the first electronic switch
The current input terminal of pipe, first electronic switching tube is believed as the input terminal of the first switch module and the cut-in voltage
The connection of number source, output end and described second of the current output terminal of first electronic switching tube as the first switch module
The first input end of comparison module connects, control of the control terminal of first electronic switching tube as the first switch module
End is connect with the output end of first comparison module.
4. driving circuit as described in claim 1, which is characterized in that the second switch module includes the second electronic switch
The current input terminal of pipe, second electronic switching tube is believed as the input terminal of the second switch module and the closing voltage
The connection of number source, output end and the third of the current output terminal of second electronic switching tube as the second switch module
The first input end of comparison module connects, control of the control terminal of second electronic switching tube as the second switch module
End is connect with the output end of first comparison module.
5. driving circuit as described in claim 1, which is characterized in that the third switch module includes:
5th electronic switching tube, the current output terminal of the 5th electronic switching tube are first defeated as the third switch module
Outlet is connect with the second input terminal of second comparison module；And
6th electronic switching tube, the current input terminal of the 6th electronic switching tube and the electric current of the 5th electronic switching tube are defeated
Enter the drive voltage signal input terminal for being connected to the third switch module is held to connect with the driving voltage source, the described 6th
The control terminal of electronic switching tube and the control terminal of the 5th electronic switching tube are connected to the control signal of the third switch module
Input terminal is connect with the output end of first comparison module, and the current output terminal of the 6th electronic switching tube is as described
The second output terminal of three switch modules is connect with the second input terminal of the third comparison module.
6. driving circuit as described in claim 1, which is characterized in that second comparison module includes the second comparator, institute
State first input end and the first switch module of the first input end of the second comparator as second comparison module
Output end connection, the second input terminal of second comparator is as the second input terminal of second comparison module and described the
First output end of three switch modules connects, output end of the output end of second comparator as second comparison module
It is connect with the first control signal input terminal of the 4th switch module.
7. driving circuit as described in claim 1, which is characterized in that the third comparison module includes third comparator, institute
State first input end and the second switch module of the first input end of third comparator as the third comparison module
Output end connection, the second input terminal of the third comparator is as the second input terminal of the third comparison module and described the
The second output terminal of three switch modules connects, output end of the output end of the third comparator as the third comparison module
It is connect with the second control signal input terminal of the 4th switch module.
8. driving circuit as described in claim 1, which is characterized in that the 4th switch module includes:
Third electronic switching tube, input terminal of the current input terminal of the third electronic switching tube as the 4th switch module
It is connect with the supply voltage source, first control of the control terminal of the third electronic switching tube as the 4th switch module
Signal input part is connect with the output end of second comparison module；
The electric current of 4th electronic switching tube, the current input terminal and the third electronic switching tube of the 4th electronic switching tube is defeated
Outlet connection, the control terminal of the 4th electronic switching tube as the 4th switch module second control signal input terminal with
The output end of the third comparison module connects, and the current output terminal of the 4th electronic switching tube is as the 4th switching molding
The output end of block.
9. a kind of driving device, which is characterized in that the driving device includes:
Driving voltage source；
Threshold voltage source；
Cut-in voltage signal source；
Close voltage signal source；And
The described in any item driving circuits of claim 1-8, the driving circuit respectively with the driving voltage source, the threshold value
Voltage source, the cut-in voltage signal source and closing voltage signal source connection.
10. a kind of display device characterized by comprising
Display panel；And
Control unit, described control unit include driving circuit as described in any one of claims 1 to 8.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811547518.1A CN109410878B (en) | 2018-12-18 | 2018-12-18 | Driving circuit, driving device and display device |
| US17/257,861 US11335290B2 (en) | 2018-12-18 | 2019-01-08 | Drive circuit, drive device and display device |
| PCT/CN2019/070824 WO2020124703A1 (en) | 2018-12-18 | 2019-01-08 | Driving circuit, driving device and display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811547518.1A CN109410878B (en) | 2018-12-18 | 2018-12-18 | Driving circuit, driving device and display device |
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| CN109410878A true CN109410878A (en) | 2019-03-01 |
| CN109410878B CN109410878B (en) | 2024-05-03 |
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| CN201811547518.1A Active CN109410878B (en) | 2018-12-18 | 2018-12-18 | Driving circuit, driving device and display device |
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