CN109285518A - compensation circuit of display panel and display panel - Google Patents
compensation circuit of display panel and display panel Download PDFInfo
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- CN109285518A CN109285518A CN201811347003.7A CN201811347003A CN109285518A CN 109285518 A CN109285518 A CN 109285518A CN 201811347003 A CN201811347003 A CN 201811347003A CN 109285518 A CN109285518 A CN 109285518A
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- 238000006243 chemical reaction Methods 0.000 claims abstract description 54
- 230000005611 electricity Effects 0.000 claims description 6
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- 238000000034 method Methods 0.000 claims description 3
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- 238000003199 nucleic acid amplification method Methods 0.000 claims 2
- 239000004973 liquid crystal related substance Substances 0.000 abstract description 4
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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
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- Liquid Crystal Display Device Control (AREA)
Abstract
The invention relates to a compensation circuit of a display panel, comprising: the output module is used for outputting a first digital voltage; the digital-to-analog conversion module is connected with the output module and used for receiving the first digital voltage and outputting a first analog voltage, and the first analog voltage is used for providing a common voltage for the display panel; the analog-to-digital conversion module is used for receiving the first analog voltage and outputting a second digital voltage; the compensation module is used for outputting a compensation control signal according to the first digital voltage and the second digital voltage, the compensation control signal is the compensated and corrected first digital voltage, and the corrected first digital voltage can correct the public voltage drop caused by the rear end back to a set value through the digital-to-analog conversion module. Therefore, the problem that the common voltage output by the compensation circuit of the traditional display panel is reduced due to different internal impedance and liquid crystal display pictures is solved.
Description
Technical field
The present invention relates to field of display technology, compensation circuit, display panel more particularly to a kind of display panel.
Background technique
Liquid crystal display panel is divided into the array layer of lower layer and the common electrode on upper layer, and the driving voltage of upper layer common electrode is called common electrical
Pressure, as the resolution of liquid crystal display panel is higher and higher, size is increasing, and the electric current pumping load of common electrode is increasing, while by
In the presence of the compensation circuit internal driving of display panel, electric current is bigger, and the common voltage decline of output will be more.
Common voltage also will receive the influence of array layer, and array layer is the data for transmitting display picture, with display
The difference of picture, common voltage also have a degree of offset situation and occur.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of benefits of the display panel of energy effective compensation utility voltage sags
Repay circuit, display panel.
In order to achieve the object of the present invention, the present invention adopts the following technical scheme:
A kind of compensation circuit of display panel, comprising:
Output module, for exporting the first digital voltage；
D/A converter module is connected with the output module, and the input terminal of the D/A converter module receives described first
Digital voltage, and the first analog voltage is exported by the output end of the D/A converter module, first analog voltage is used for
Common voltage is provided to the display panel；
Analog-to-digital conversion module is connected with the D/A converter module, described in the input terminal reception of the analog-to-digital conversion module
First analog voltage, and the second digital voltage is exported by the output end of the analog-to-digital conversion module；
Compensating module, the input terminal of the compensating module connect the output of the output module and the analog-to-digital conversion module
End, the output end of the compensating module are connected with the input terminal of the D/A converter module, for according to the first number electricity
Pressure and second digital voltage export compensating control signal, and the compensating control signal is first number of compensating approach
Voltage.
The compensating module includes: in one of the embodiments,
Difference module is sought, the input terminal for seeking difference module connects the output of the output module and the analog-to-digital conversion module
End, for obtaining first digital voltage of the output module output and the institute of analog-to-digital conversion module output end output
The voltage difference of the second digital voltage is stated, and the voltage difference is exported by the output end for seeking difference module；
Summation module, the input terminal of the summation module connect the output module and the output end for seeking difference module,
The output end of the summation module connects the input terminal of the D/A converter module, and the summation module is used for the output mould
First digital voltage of block output and the voltage difference for asking difference module output end to export are overlapped to obtain the
Three digital voltages, and the third digital voltage is exported by the output end of the summation module.
In one of the embodiments, further include:
Drive module, the input terminal of the drive module are connected with the output end of the D/A converter module, the driving
The input terminal of module exports the second analog voltage, institute for receiving first analog voltage, the output end of the drive module
The second analog voltage is stated for providing common voltage to the display panel；
The output end of the drive module is connected with the input terminal of the analog-to-digital conversion module.
The output module includes: in one of the embodiments,
Storage unit, for storing first digital voltage.
The output module in one of the embodiments, further include:
Control unit, for exporting control signal, the control signal includes first digital voltage.
Described control unit is microprocessing unit in one of the embodiments, and the control signal includes clock signal
With the first digital voltage.
It is described in one of the embodiments, that difference module is asked to include the first amplifier, first resistor, second resistance, third
Resistance and the 4th resistance；
The first end of the first resistor connects the output module, the second end connection described first of the first resistor
The negative-phase input of amplifier；
The first end of the second resistance connects the output end of the analog-to-digital conversion module, the second end of the second resistance
Connect the normal phase input end of first amplifier；
The first end of the 3rd resistor connects the normal phase input end of first amplifier, and the second of the 3rd resistor
End ground connection；
The first end of 4th resistance connects the negative-phase input of first amplifier, and the second of the 4th resistance
End connects the output end of first amplifier；
The input terminal of the summation module connects the output end of the output module and first amplifier, the summation
The input terminal that the output end of module connects the D/A converter module is connected.
The summation module includes the second amplifier, the 5th resistance, the 6th resistance and the 7th in one of the embodiments,
Resistance；
The first end of 5th resistance connects the output module, the second end connection described second of the 5th resistance
The negative-phase input of amplifier；
The first end of 6th resistance connects the output end of first amplifier, and the second end of the 6th resistance connects
Connect the negative-phase input of second amplifier；
The first end of 7th resistance connects the negative-phase input of second amplifier, and the second of the 7th resistance
The output end held and connect second amplifier；
The positive input end grounding of second amplifier；
The output end of second amplifier is connected with the input terminal of the D/A converter module.
In order to achieve the object of the present invention, the present invention also adopts the following technical scheme that
A kind of compensation circuit of display panel, comprising:
Memory module, for storing the first digital voltage；
D/A converter module is connected with the memory module, and the input terminal of the D/A converter module receives described first
Digital voltage, and the first analog voltage is exported by the output end of the D/A converter module；
Drive module, the input terminal of the drive module are connected with the output end of the D/A converter module, the driving
The input terminal of module exports the second analog voltage, institute for receiving first analog voltage, the output end of the drive module
The second analog voltage is stated for providing common voltage to the display panel；
Analog-to-digital conversion module is connected with the drive module, and the input terminal of the analog-to-digital conversion module receives described second
Analog voltage, and the second digital voltage is exported by the output end of the analog-to-digital conversion module；
Difference module is sought, the input terminal for seeking difference module connects the output of the memory module and the analog-to-digital conversion module
End, for obtaining first digital voltage of the memory module output and the institute of analog-to-digital conversion module output end output
The voltage difference of the second digital voltage is stated, and the voltage difference is exported by the output end for seeking difference module；
Summation module, the input terminal of the summation module connect the memory module and the output end for seeking difference module,
The output end of the summation module connects the input terminal of the D/A converter module, and the summation module is used for the storage mould
First digital voltage of block output and the voltage difference for asking difference module output end to export are overlapped to obtain the
Three digital voltages, and the third digital voltage is exported by the output end of the summation module.
In order to achieve the object of the present invention, the present invention also provides a kind of display panels:
A kind of display panel, the compensation circuit including above-mentioned display panel.
The compensation circuit of above-mentioned display panel increases modulus on the basis of the compensation circuit of traditional display panel
Conversion module and compensating module, wherein the first analog voltage for being supplied to display panel is converted into second by analog-to-digital conversion module
Digital voltage；The output end of input terminal the connection output module and analog-to-digital conversion module of compensating module, the output end of compensating module
It is connected with the input terminal of D/A converter module, for according to the first digital voltage and the second digital voltage output compensation control letter
Number, compensating control signal is the first digital voltage after compensating approach, and compensated first digital voltage turns using digital-to-analogue
Block is changed the mold, common voltage caused by rear end can be declined and correct back setting value, to solve the compensation electricity of conventional display panels
First digital voltage of the output module output in road, exports the first analog voltage by D/A converter module, due in module
The presence of portion's impedance, the first analog voltage (common voltage) decline of output, while again because of the resolution of current display panel
That does is higher, and size is larger, becomes larger so that the electric current of the compensation circuit of display panel is taken out to carry, and causes common voltage decline faster
Problem.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the compensation circuit of display panel in an embodiment；
Fig. 2 is the structural schematic diagram of compensating module in an embodiment；
Fig. 3 is the structural schematic diagram of the compensation circuit of display panel in another embodiment；
Fig. 4 is the circuit diagram that difference module is sought in an embodiment；
Fig. 5 is the circuit diagram of summation module in an embodiment；
Fig. 6 is the structural schematic diagram of the compensation circuit of display panel in another embodiment.
Specific embodiment
To facilitate the understanding of the present invention, a more comprehensive description of the invention is given in the following sections with reference to the relevant attached drawings.In attached drawing
Give preferred embodiment of the invention.But the invention can be realized in many different forms, however it is not limited to this paper institute
The embodiment of description.On the contrary, purpose of providing these embodiments is make it is more thorough and comprehensive to the disclosure.
Unless otherwise defined, all technical and scientific terms used herein and belong to technical field of the invention
The normally understood meaning of technical staff is identical.Term as used herein in the specification of the present invention is intended merely to description tool
The purpose of the embodiment of body, it is not intended that in the limitation present invention.
In addition, term " first ", " second " are used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance
Or implicitly indicate the quantity of indicated technical characteristic.Define " first " as a result, the feature of " second " can be expressed or
Implicitly include at least one this feature.In the description of the present invention, the meaning of " plurality " is at least two, such as two, three
It is a etc., unless otherwise specifically defined.In the description of the present invention, " several " are meant that at least one, such as one,
Two etc., unless otherwise specifically defined.
In the description of the present invention, it is to be understood that, term " on ", "lower", "vertical", "horizontal", "inner", "outside" etc.
The orientation or positional relationship of instruction is method based on the figure or positional relationship, is merely for convenience of the description present invention and letter
Change description, rather than the device or element of indication or suggestion meaning must have a particular orientation, with specific orientation construct and
Operation, therefore be not considered as limiting the invention.
It is the structural schematic diagram of the compensation circuit of display panel in an embodiment referring to Fig. 1, Fig. 1.
A kind of compensation circuit 10 of display panel, comprising:
Output module 100, for exporting the first digital voltage U1；
D/A converter module 120 is connected with output module 100, and the input terminal of D/A converter module 120 receives the first number
Voltage U1, and be used for by the output end of D/A converter module the first analog voltage of output V1, the first analog voltage V1 to display
Panel 20 provides common voltage；
Analog-to-digital conversion module 130 is connected with D/A converter module 120, and the input terminal of analog-to-digital conversion module 130 receives first
Analog voltage V1, and the second digital voltage U2 is exported by the output end of analog-to-digital conversion module；
Compensating module 110, the output of input terminal the connection output module 100 and analog-to-digital conversion module 130 of compensating module 110
End, the output end of compensating module 100 is connected with the input terminal of D/A converter module 120, be used for according to the first digital voltage U1 with
Second digital voltage U2 exports compensating control signal U3, and compensating control signal U3 is the first digital voltage U1 of compensating approach.
The compensation circuit 10 of above-mentioned display panel increases on the basis of compensation circuit 10 of traditional display panel
Analog-to-digital conversion module 130 and compensating module 110, wherein analog-to-digital conversion module 130 will be supplied to the first simulation of display panel 20
Voltage V1 is converted into the second digital voltage U2, which can be analog-digital converter；Compensating module 110 it is defeated
Enter the output end of end connection output module 100 and analog-to-digital conversion module 130, the output end and digital-to-analogue conversion mould of compensating module 110
The input terminal of block 120 is connected, and for exporting compensating control signal U3 according to the first digital voltage U1 and the second digital voltage U2, mends
Repaying control signal U3 is that the first digital voltage U1, compensated first digital voltage U1 after compensating approach turns using digital-to-analogue
Block 120 is changed the mold, common voltage caused by rear end can be declined and correct back setting value, to solve the compensation of conventional display panels
The first digital voltage U1 that output module 100 in circuit 10 exports exports the first analog voltage by D/A converter module 120
V1, due to the presence of inside modules impedance, the first analog voltage V1 (common voltage) of output declines, while again because aobvious at present
Show that the resolution of panel 20 is done higher, size is larger, becomes larger so that the electric current of the compensation circuit 10 of display panel is taken out to carry, causes
The problem of common voltage declines faster.
In the present embodiment, referring to fig. 2, Fig. 2 is the structural schematic diagram of compensating module 110 in an embodiment, compensating module
110 include:
Difference module 1101 is sought, the input terminal of difference module 1101 is asked to connect the defeated of output module 100 and analog-to-digital conversion module 130
Outlet, for obtaining the first digital voltage U1 and the second of the output of 130 output end of analog-to-digital conversion module of the output of output module 100
The voltage difference Δ U of digital voltage U2, and the output end output voltage difference DELTA U by seeking difference module 11；
Summation module 1102, the input terminal connection output module 100 of summation module 1102 and the output for seeking difference module 1101
End, the input terminal of the output end connection D/A converter module 120 of summation module 1102, summation module 1102 are used for output module
First digital voltage U1 of 100 outputs is overlapped to obtain third with the voltage difference Δ U for asking 1101 output end of difference module to export
Digital voltage U3, and third digital voltage U3 is exported by the output end of summation module 1102.
In the present embodiment, compensating module 110 includes asking difference module 1101 and summation module 1102, wherein seeks difference module
1101 can be subtracter, and summation module 1102 can be adder, its working principle is that: the first of the output of output module 100
Digital voltage U1 passes through D/A converter module 120, and the first digital voltage U1 is converted to the first simulation electricity by D/A converter module 120
V1 is pressed, the first analog voltage V1 is converted to the second digital voltage U2 using analog-to-digital conversion module 130 by the present invention, by seeking differential mode
Collected first digital voltage U1 and the second digital voltage U2 are asked poor, obtain voltage difference Δ U, pass through summation by block 1101
Module 1102 sums collected first digital voltage U1 and voltage difference Δ U to obtain third digital voltage U3, third number
Voltage U3 is the first digital voltage U1 after compensating approach, and the revised first digital voltage U1 is using digital-to-analogue conversion mould
Common voltage caused by rear end can be declined and correct back setting value by block 120, which can be digital-to-analogue and turn
Parallel operation.
Further, it is the structural schematic diagram of the compensation circuit 10 of display panel in another embodiment referring to Fig. 3, Fig. 3, shows
Show the compensation circuit 10 of panel further include:
The input terminal of drive module 140, drive module 140 is connected with the output end of D/A converter module 120, drive module
140 input terminal is for receiving the first analog voltage V1, output end output the second analog voltage V2 of drive module 140, and second
Analog voltage V2 is used to provide common voltage to display panel 20；
The output end of drive module 140 is connected with the input terminal of analog-to-digital conversion module 130.
Due to the first analog voltage V1 that D/A converter module 120 generates, the common electrical as provided to display panel 20
Pressure, the common voltage driving capability very little, newly-increased drive module can be current amplifier, guarantee output 100mA's or more
Electric current enhances the fan-out capability of common voltage.
In one embodiment, output module 100 includes:
Storage unit, for storing the first digital voltage U1, wherein storage unit can be memory.
Further, output module 100 further include:
Control unit, for exporting control signal, control signal includes the first digital voltage U1.
Specifically, control unit is microprocessing unit, and control signal includes clock signal and the first digital voltage.
Above-mentioned output module 100 includes storage unit or control unit, when output module 100 includes storage unit,
First digital voltage U1 need to be stored in storage unit, supply its normal work when needing to provide common voltage V1 to display panel 20
When making, the first digital voltage U1 inside storage unit need to be transferred, is converted into the first analog voltage by D/A converter module 120
V1 provides common voltage V1 for display panel 20；When output module 100 includes control unit, control unit and digital-to-analogue conversion
Module 120 is connected via Jie's bus, and for providing control signal to D/A converter module 120, control signal includes clock signal
With the first digital voltage U1 signal.Control unit can be microprocessor, including clock end and data terminal, and clock end is for sending
Clock signal；Data terminal for send the first digital voltage U1 signal, Jie's bus be twin wire universal serial bus, including clock end and
Data terminal, to realize the communication of synchrodata.
Specifically, referring to fig. 4, Fig. 4 is the circuit diagram that difference module 1101 is sought in an embodiment, and difference module 1101 is asked to wrap
Include the first amplifier A1, first resistor R1, second resistance R2,3rd resistor R3 and the 4th resistance R4；
The first end of first resistor R1 connects output module 100, and the second end of first resistor R1 connects the first amplifier A1
Negative-phase input；
The output end of the first end connection analog-to-digital conversion module 130 of second resistance R2, the second end connection of second resistance R2
The normal phase input end of first amplifier A1；
The first end of 3rd resistor R3 connects the normal phase input end of the first amplifier A1, the second termination of 3rd resistor R3
Ground；
The first end of 4th resistance R4 connects the negative-phase input of the first amplifier A1, the second end connection of the 4th resistance R4
The output end of first amplifier A1；
The output end of input terminal the connection output module 100 and the first amplifier A1 of summation module 1102, summation module
The input terminal of 1102 output end connection D/A converter module 120 is connected.
It specifically, is the circuit diagram of summation module 1102 in an embodiment referring to Fig. 5, Fig. 5, summation module 1102 wraps
Include the second amplifier A2, the 5th resistance R5, the 6th resistance R6 and the 7th resistance R7；
The first end of 5th resistance R5 connects output module 100, and the second end of the 5th resistance R5 connects the second amplifier A2
Negative-phase input；
The first end of 6th resistance R6 connects the output end of the first amplifier A1, the second end connection second of the 6th resistance R6
The negative-phase input of amplifier A2；
The first end of 7th resistance R7 connects the negative-phase input of the second amplifier A2, the second end of the 7th resistance R7 and company
Connect the output end of the second amplifier A2；
The positive input end grounding of second amplifier A2；
The output end of second amplifier A2 is connected with the input terminal of D/A converter module 120.
In order to achieve the object of the present invention, the present invention also adopts the following technical scheme that
A kind of compensation circuit 10 of display panel, referring to Fig. 6, Fig. 6 is the compensation circuit of display panel in another embodiment
10 structural schematic diagram, comprising:
Memory module 101, for storing the first digital voltage U1；
D/A converter module 120 is connected with memory module 101, and the input terminal of D/A converter module 120 receives the first number
Voltage U1, and the first analog voltage V1 is exported by the output end of D/A converter module 120；
The input terminal of drive module 140, drive module 140 is connected with the output end of D/A converter module 120, drive module
140 input terminal is for receiving the first analog voltage V1, output end output the second analog voltage V2 of drive module 140, and second
Analog voltage V2 is used to provide common voltage to display panel 20；
Analog-to-digital conversion module 130 is connected with drive module 140, and the input terminal of analog-to-digital conversion module 130 receives the second simulation
Voltage V2, and the second digital voltage U2 is exported by the output end of analog-to-digital conversion module 130；
Difference module 1101 is sought, the input terminal of difference module 1101 is asked to connect the defeated of memory module 101 and analog-to-digital conversion module 130
Outlet, for obtaining the first digital voltage U1 and the second of the output of 130 output end of analog-to-digital conversion module of the output of memory module 101
The voltage difference Δ U of digital voltage U2, and the output end output voltage difference DELTA U by seeking difference module 1101；
Summation module 1102, the input terminal connection memory module 101 of summation module 1102 and the output for seeking difference module 1101
End, the input terminal of the output end connection D/A converter module 120 of summation module 1102, summation module 1102 are used for memory module
First digital voltage U1 of 101 outputs is overlapped to obtain third with the voltage difference Δ U for asking 1101 output end of difference module to export
Digital voltage U3, and third digital voltage U3 is exported by the output end of summation module 1102.
The compensation circuit 10 of above-mentioned display panel increases on the basis of compensation circuit 10 of traditional display panel
Analog-to-digital conversion module 130 asks difference module 1101 and summation module 1102, its working principle is that: the first of the output of memory module 101
Digital voltage U1 passes through D/A converter module 120, and the first digital voltage U1 is converted to the first simulation electricity by D/A converter module 120
V1, the first analog voltage V1 is pressed to export the second analog voltage V2 by drive module 140, analog-to-digital conversion module 130 is by the first mould
Quasi- voltage V2 is converted to the second digital voltage U2, by seeking difference module 1101, by collected first digital voltage U1 and second
Digital voltage U2 asks poor, obtains voltage difference Δ U, by summation module 1102, by collected first digital voltage U1 and electricity
Pressure difference Δ U sums to obtain third digital voltage U3, and third digital voltage U3 is the first digital voltage U1 after compensating approach,
Common voltage caused by rear end can be declined and be repaired using D/A converter module 120 by the revised first digital voltage U1
Setting value is just returned, to solve the first digital voltage that the memory module 101 in the compensation circuit 10 of conventional display panels exports
U1 exports the first analog voltage V1 by D/A converter module 120, due to the presence of inside modules impedance, the first mould of output
Quasi- voltage V1 (common voltage) decline, while again because the resolution of current display panel 20 does higher, size is larger, thus
The electric current of the compensation circuit 10 of display panel, which is taken out, carries the problem of becoming larger, common voltage is caused to decline faster.
In order to achieve the object of the present invention, the present invention also provides a kind of display panels:
A kind of display panel, the compensation circuit 10 including above-mentioned display panel.
Above-mentioned display panel, the compensation circuit 10 including above-mentioned display panel, is effectively guaranteed display panel
The common voltage that compensation circuit 10 is supplied to display panel 20 is to maintain constant, eliminates the compensation circuit of conventional display panels
The influence that the common voltage of middle output causes it to decline because of internal driving, liquid crystal display picture difference.
Each technical characteristic of embodiment described above can be combined arbitrarily, for simplicity of description, not to above-mentioned reality
It applies all possible combination of each technical characteristic in example to be all described, as long as however, the combination of these technical characteristics is not deposited
In contradiction, all should be considered as described in this specification.
The embodiments described above only express several embodiments of the present invention, and the description thereof is more specific and detailed, but simultaneously
It cannot therefore be construed as limiting the scope of the patent.It should be pointed out that coming for those of ordinary skill in the art
It says, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to protection of the invention
Range.Therefore, the scope of protection of the patent of the invention shall be subject to the appended claims.
Claims (10)
1. a kind of compensation circuit of display panel characterized by comprising
Output module, for exporting the first digital voltage；
D/A converter module is connected with the output module, and the input terminal of the D/A converter module receives first number
Voltage, and the first analog voltage is exported by the output end of the D/A converter module, first analog voltage is used for institute
It states display panel and common voltage is provided；
Analog-to-digital conversion module is connected with the D/A converter module, and the input terminal of the analog-to-digital conversion module receives described first
Analog voltage, and the second digital voltage is exported by the output end of the analog-to-digital conversion module；
Compensating module, the input terminal of the compensating module connect the output end of the output module and the analog-to-digital conversion module,
The output end of the compensating module is connected with the input terminal of the D/A converter module, for according to first digital voltage and
Second digital voltage exports compensating control signal, and the compensating control signal is the first number electricity of compensating approach
Pressure.
2. the compensation circuit of display panel according to claim 1, which is characterized in that the compensating module includes:
Difference module is sought, the input terminal for seeking difference module connects the output end of the output module and the analog-to-digital conversion module,
For obtaining described in first digital voltage and the analog-to-digital conversion module output end output of the output module output
The voltage difference of second digital voltage, and the voltage difference is exported by the output end for seeking difference module；
Summation module, the input terminal of the summation module connects the output module and the output end for seeking difference module, described
The output end of summation module connects the input terminal of the D/A converter module, and the summation module is used for the output module is defeated
First digital voltage and the voltage difference for asking difference module output end to export out is overlapped to obtain third number
Word voltage, and the third digital voltage is exported by the output end of the summation module.
3. the compensation circuit of display panel according to claim 1, which is characterized in that further include:
Drive module, the input terminal of the drive module are connected with the output end of the D/A converter module, the drive module
Input terminal for receiving first analog voltage, the output end of the drive module exports the second analog voltage, described the
Two analog voltages are used to provide common voltage to the display panel；
The output end of the drive module is connected with the input terminal of the analog-to-digital conversion module.
4. the compensation circuit of display panel according to claim 1, which is characterized in that the output module includes:
Storage unit, for storing first digital voltage.
5. the compensation circuit of display panel according to claim 4, which is characterized in that the output module further include:
Control unit, for exporting control signal, the control signal includes first digital voltage.
6. the compensation circuit of display panel according to claim 4, which is characterized in that described control unit is micro process list
Member, the control signal includes clock signal and the first digital voltage.
7. the compensation circuit of display panel according to claim 2, which is characterized in that described that difference module is asked to put including first
Big device, first resistor, second resistance, 3rd resistor and the 4th resistance；
The first end of the first resistor connects the output module, the second end connection of the first resistor first amplification
The negative-phase input of device；
The first end of the second resistance connects the output end of the analog-to-digital conversion module, the second end connection of the second resistance
The normal phase input end of first amplifier；
The first end of the 3rd resistor connects the normal phase input end of first amplifier, the second termination of the 3rd resistor
Ground；
The first end of 4th resistance connects the negative-phase input of first amplifier, and the second end of the 4th resistance connects
Connect the output end of first amplifier；
The input terminal of the summation module connects the output end of the output module and first amplifier, the summation module
Output end connect the D/A converter module input terminal be connected.
8. the compensation circuit of display panel according to claim 7, which is characterized in that the summation module is put including second
Big device, the 5th resistance, the 6th resistance and the 7th resistance；
The first end of 5th resistance connects the output module, the second end connection of the 5th resistance second amplification
The negative-phase input of device；
The first end of 6th resistance connects the output end of first amplifier, and the second end of the 6th resistance connects institute
State the negative-phase input of the second amplifier；
The first end of 7th resistance connects the negative-phase input of second amplifier, the second end of the 7th resistance with
Connect the output end of second amplifier；
The positive input end grounding of second amplifier；
The output end of second amplifier is connected with the input terminal of the D/A converter module.
9. a kind of compensation circuit of display panel characterized by comprising
Memory module, for storing the first digital voltage；
D/A converter module is connected with the memory module, and the input terminal of the D/A converter module receives first number
Voltage, and the first analog voltage is exported by the output end of the D/A converter module；
Drive module, the input terminal of the drive module are connected with the output end of the D/A converter module, the drive module
Input terminal for receiving first analog voltage, the output end of the drive module exports the second analog voltage, described the
Two analog voltages are used to provide common voltage to the display panel；
Analog-to-digital conversion module is connected with the drive module, and the input terminal of the analog-to-digital conversion module receives second simulation
Voltage, and the second digital voltage is exported by the output end of the analog-to-digital conversion module；
Difference module is sought, the input terminal for seeking difference module connects the output end of the memory module and the analog-to-digital conversion module,
For obtaining described in first digital voltage and the analog-to-digital conversion module output end output of the memory module output
The voltage difference of second digital voltage, and the voltage difference is exported by the output end for seeking difference module；
Summation module, the input terminal of the summation module connects the memory module and the output end for seeking difference module, described
The output end of summation module connects the input terminal of the D/A converter module, and the summation module is used for the memory module is defeated
First digital voltage and the voltage difference for asking difference module output end to export out is overlapped to obtain third number
Word voltage, and the third digital voltage is exported by the output end of the summation module.
10. a kind of display panel, which is characterized in that the compensation including display panel as claimed in any one of claims 1 to 9 wherein
Circuit.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811347003.7A CN109285518B (en) | 2018-11-13 | 2018-11-13 | Compensation circuit of display panel and display panel |
| PCT/CN2018/121787 WO2020098056A1 (en) | 2018-11-13 | 2018-12-18 | Compensation circuit of display panel, and display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811347003.7A CN109285518B (en) | 2018-11-13 | 2018-11-13 | Compensation circuit of display panel and display panel |
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| Publication Number | Publication Date |
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| CN109285518A true CN109285518A (en) | 2019-01-29 |
| CN109285518B CN109285518B (en) | 2021-05-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811347003.7A Active CN109285518B (en) | 2018-11-13 | 2018-11-13 | Compensation circuit of display panel and display panel |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN109285518B (en) |
| WO (1) | WO2020098056A1 (en) |
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| CN101655687A (en) * | 2008-08-20 | 2010-02-24 | 鸿富锦精密工业（深圳）有限公司 | Calibration system of voltage error |
| CN103841712A (en) * | 2012-11-27 | 2014-06-04 | 中国科学院沈阳自动化研究所 | System and method for controlling LED light source |
| CN106873688A (en) * | 2017-04-26 | 2017-06-20 | 深圳市华星光电技术有限公司 | Time schedule controller input voltage control system and control method |
| CN107437407A (en) * | 2017-08-11 | 2017-12-05 | 昆山龙腾光电有限公司 | Public voltage generating circuit and liquid crystal display device |
| CN107578752A (en) * | 2017-09-20 | 2018-01-12 | 京东方科技集团股份有限公司 | Common electric voltage calibration circuit, circuit board and display device |
| CN107680546A (en) * | 2017-09-28 | 2018-02-09 | 深圳市华星光电技术有限公司 | Compensate delay circuit and display device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI353577B (en) * | 2006-10-26 | 2011-12-01 | Novatek Microelectronics Corp | Voltage conversion device having non-linear gain a |
| CN108182922B (en) * | 2018-01-09 | 2020-08-04 | 昆山龙腾光电股份有限公司 | Common voltage adjusting device, adjusting method and liquid crystal display device |
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2018
- 2018-11-13 CN CN201811347003.7A patent/CN109285518B/en active Active
- 2018-12-18 WO PCT/CN2018/121787 patent/WO2020098056A1/en active Application Filing
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101655687A (en) * | 2008-08-20 | 2010-02-24 | 鸿富锦精密工业（深圳）有限公司 | Calibration system of voltage error |
| CN103841712A (en) * | 2012-11-27 | 2014-06-04 | 中国科学院沈阳自动化研究所 | System and method for controlling LED light source |
| CN106873688A (en) * | 2017-04-26 | 2017-06-20 | 深圳市华星光电技术有限公司 | Time schedule controller input voltage control system and control method |
| CN107437407A (en) * | 2017-08-11 | 2017-12-05 | 昆山龙腾光电有限公司 | Public voltage generating circuit and liquid crystal display device |
| CN107578752A (en) * | 2017-09-20 | 2018-01-12 | 京东方科技集团股份有限公司 | Common electric voltage calibration circuit, circuit board and display device |
| CN107680546A (en) * | 2017-09-28 | 2018-02-09 | 深圳市华星光电技术有限公司 | Compensate delay circuit and display device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109285518B (en) | 2021-05-25 |
| WO2020098056A1 (en) | 2020-05-22 |
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