CN110148386A - Common voltage provides circuit and display panel - Google Patents
Common voltage provides circuit and display panel Download PDFInfo
- Publication number
- CN110148386A CN110148386A CN201910379148.3A CN201910379148A CN110148386A CN 110148386 A CN110148386 A CN 110148386A CN 201910379148 A CN201910379148 A CN 201910379148A CN 110148386 A CN110148386 A CN 110148386A
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- Prior art keywords
- operational amplifier
- common voltage
- voltage
- control module
- common
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- 230000005669 field effect Effects 0.000 claims description 16
- 238000006243 chemical reaction Methods 0.000 claims description 15
- 230000005611 electricity Effects 0.000 claims description 3
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 241000208340 Araliaceae Species 0.000 description 1
- 235000005035 Panax pseudoginseng ssp. pseudoginseng Nutrition 0.000 description 1
- 235000003140 Panax quinquefolius Nutrition 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 235000008434 ginseng Nutrition 0.000 description 1
- 239000004973 liquid crystal related substance Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
- G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
- G09G3/3611—Control of matrices with row and column drivers
- G09G3/3696—Generation of voltages supplied to electrode drivers
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- Engineering & Computer Science (AREA)
- 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)
- Liquid Crystal Display Device Control (AREA)
Abstract
The present invention provides a kind of common voltages to provide circuit and display panel, and it includes: a Logic control module that common voltage, which provides circuit, for receiving external control signal and exporting the digital signal of presetting digit capacity；One drive control module, connect and output multi-channel analog voltage signal according to the digital signal with the output end of the Logic control module；One common voltage generation module, connect with the drive control module, and the output multi-channel common voltage under the control of the multi-channel analog voltage signal.The present invention provides drive control module and the common voltage generation module of circuit by common voltage to generate the different common voltage of multichannel, and the display quality of display panel can be improved.
Description
Technical field
The present invention relates to field of display technology, and in particular to a kind of common voltage provides circuit and display panel.
Background technique
With flourishing for liquid crystal display epoch, image quality taste, screen size, appearance and view of the market to display screen
Angle requires to be increasingly stringenter, the ultra-large type that releases one after another, narrow frame and wide viewing angle and the LCD screen that excellent image quality can be presented.Plate
The market prospects of display screen are a piece of wide, motivate framework in the increasingly enhancement, such as face of display technology, driving and power supply part
Optimization and innovation.The type of the variation of framework etc. in the size of display screen and face, the COM voltage for causing panel itself to need needs
It asks and increases to meet image quality requirement.The existing usual chip of integrated chip generates a COM voltage, designs band to panel circuit
Come the increase of cost and the challenge of many and diverse configuration.
Therefore, the prior art is defective, needs to improve.
Summary of the invention
The present invention provides a kind of common voltage and provides circuit and display panel, and display quality can be improved.
The present invention provides a kind of common voltages to provide circuit, comprising:
One Logic control module, for receiving external control signal and exporting the digital signal of presetting digit capacity；
One drive control module connect with the output end of the Logic control module and exports according to the digital signal
Multi-channel analog voltage signal；
One common voltage generation module, connect with the drive control module, and in the multi-channel analog voltage signal
Control under output multi-channel common voltage.
It is provided in circuit in common voltage of the present invention, the drive control module includes the modulus of N number of default position
Converting unit, the input terminal of each AD conversion unit are connect respectively to be used for the number with the Logic control module
Word signal is converted into analog voltage signal, and N is the integer greater than 2.
It is provided in circuit in common voltage of the present invention, the common voltage generation module includes:
N number of first operational amplifier, the normal phase input end of N number of first operational amplifier respectively with N number of analog-to-digital conversion
The output end of unit connects correspondingly, and the inverting input terminal of each first operational amplifier is separately connected one first point
Press unit；
N number of first field-effect tube, N number of first operational amplifier grid with N number of first field-effect tube respectively
It connects correspondingly, the source electrode of each first field-effect tube and corresponding first partial pressure unit and the first operational amplifier
Common node connection；
N number of second operational amplifier, the normal phase input end of N number of second operational amplifier and N number of first effect
Should the drain electrode of pipe connect correspondingly, the inverting input terminal of each second operational amplifier accesses feedback voltage, each
The output end of the second operational amplifier is for exporting common voltage all the way；
N number of setting unit, each setting unit public affairs with one first field-effect tube and second operational amplifier respectively
Conode connection is to be arranged the common voltage that corresponding second operational amplifier exports.
It is provided in circuit in common voltage of the present invention, the feedback voltage includes the inside display panel
Second feedback voltage of one feedback voltage and the output end from second operational amplifier；
The inverting input terminal of each second operational amplifier accesses first feedback voltage or second feedback
Voltage.
It is provided in circuit in common voltage of the present invention, the N=3, two of 3 second operational amplifiers
The inverting input terminal of second operational amplifier accesses first feedback voltage, and the reverse phase of another second operational amplifier is defeated
Enter to terminate into second feedback voltage.
It is provided in circuit in common voltage of the present invention, the setting unit includes first resistor and the second electricity
Reference voltage, one end company of the other end of the first resistor and the second resistance are accessed in resistance, one end of the first resistor
It connects, the other end ground connection of the second resistance, the common node of the first resistor and the second resistance, first effect
It should manage and be connected with the common node of second operational amplifier.
It is provided in circuit in common voltage of the present invention, first partial pressure unit includes 3rd resistor.
It is provided in circuit in common voltage of the present invention, the D/A conversion unit includes that the digital-to-analogue of one 10 bytes turns
Parallel operation.
It is provided in circuit in common voltage of the present invention, further includes an interface module, the interface module is I2C string
Line interface, the I2C serial line interface include digital dock input interface and data input output interface, the digital dock
Input interface and data input output interface connect respectively with the Logic control module.
It is provided in circuit in common voltage of the present invention, further includes a voltage management module, the voltage management mould
Block connect respectively with the feeder ear of the Logic control module, first operational amplifier and the AD conversion unit with
Corresponding supply voltage is provided respectively.
A kind of display panel, including common voltage described in any of the above embodiments provide circuit.
The present invention is more to generate by the drive control module and common voltage generation module of common voltage offer circuit
The display quality of display panel can be improved in the different common voltage in road.
Detailed description of the invention
It, below will be to embodiment or the prior art in order to illustrate more clearly of embodiment or technical solution in the prior art
Attached drawing needed in description is briefly described, it should be apparent that, the accompanying drawings in the following description is only some of invention
Embodiment for those of ordinary skill in the art without creative efforts, can also be attached according to these
Figure obtains other attached drawings.
Fig. 1 is that one of some embodiments of the invention common voltage provides a kind of structure chart of circuit.
Fig. 2 is that one of some embodiments of the invention common voltage provides another structure chart of circuit.
Specific embodiment
Embodiments of the present invention are described below in detail, the example of the embodiment is shown in the accompanying drawings, wherein from beginning
Same or similar element or element with the same or similar functions are indicated to same or similar label eventually.Below by ginseng
The embodiment for examining attached drawing description is exemplary, and for explaining only the invention, and is not considered as limiting the invention.
In the description of the present invention, it is to be understood that, term " center ", " longitudinal direction ", " transverse direction ", " length ", " width ",
" thickness ", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outside", " up time
The orientation or positional relationship of the instructions such as needle ", " counterclockwise " is to be based on the orientation or positional relationship shown in the drawings, and is merely for convenience of
The description present invention and simplified description, rather than the device or element of indication or suggestion meaning must have a particular orientation, with spy
Fixed orientation construction and operation, therefore be not considered as limiting the invention.In addition, term " first ", " second " are only used for
Purpose is described, relative importance is not understood to indicate or imply or implicitly indicates the quantity of indicated technical characteristic.
" first " is defined as a result, the feature of " second " can explicitly or implicitly include one or more N number of feature.?
In description of the invention, " N number of " is meant that two or more, unless otherwise specifically defined.
Please refer to Fig. 1, a kind of common voltage offer circuit a, comprising: Logic control module 10, a drive control mould
Block 20, a common voltage generation module 30 and interface module 50.
Wherein, the Logic control module 10 is for receiving external control signal by the interface module 50 and exporting default
The digital signal of digit；One drive control module 20 connect with the output end of the Logic control module 10 and according to the number
Signal output multi-channel analog voltage signal；Common voltage generation module 30 is connect with the drive control module 20, and described
Output multi-channel common voltage under the control of multi-channel analog voltage signal.
Specifically, referring to Fig. 2, which is logic control chip, and register is arranged inside.
The drive control module 20 includes the AD conversion unit U3, each AD conversion unit U3 of N number of default position
Input terminal connect with the Logic control module 10 respectively with for the digital signal to be converted into analog voltage signal, N
For the integer greater than 2.In some embodiments, AD conversion unit U3 is the analog-digital converter of 10 bytes.
Wherein, which includes: N number of first operational amplifier U1, N number of first field-effect tube Q1, N
A second operational amplifier U2, N number of setting unit 31.
Wherein, the normal phase input end of the N number of first operational amplifier U1 output end with N number of AD conversion unit U3 respectively
It connects correspondingly, the inverting input terminal of each first operational amplifier U1 is separately connected one first partial pressure unit R3；
N number of first operational amplifier is connect with the grid of N number of first field-effect tube Q1 correspondingly respectively, and each described
The source electrode of one field-effect tube Q1 is connect with corresponding first partial pressure unit R1 with the common node of the first operational amplifier U1.The N
The normal phase input end of a second operational amplifier U2 is connect correspondingly with the drain electrode of N number of first field-effect tube Q1, often
The inverting input terminal of the one second operational amplifier U2 accesses feedback voltage, the output of each second operational amplifier U2
End is for exporting common voltage all the way.Each setting unit 31 respectively with one first field-effect tube Q1 and second operational amplifier U2
Common node connection the common voltage of corresponding second operational amplifier U2 output is arranged.
Specifically, in some embodiments, the feedback voltage include the first feedback voltage inside display panel with
And the second feedback voltage of the output end from second operational amplifier；The anti-phase input of each second operational amplifier U2
It terminates into first feedback voltage or second feedback voltage.
In the present embodiment, the reverse phase of two second operational amplifier U2 in N=3,3 second operational amplifier U2 is defeated
Enter to terminate into the first feedback voltage V COM_FB.The inverting input terminal access described the of another second operational amplifier
Two feedback voltages that is to say that the inverting input terminal of the second operational amplifier is connect with its output end.
Specifically, which includes first resistor R1 and second resistance R2, one end of the first resistor R1
Reference voltage VREF is accessed, the other end of the first resistor R1 is connect with one end of the second resistance R2, second electricity
Hinder the other end ground connection of R2, common node, the first field-effect tube Q1 of the first resistor R1 and the second resistance R2
It is connected with the common node of second operational amplifier U2.
Wherein, first partial pressure unit R3 includes 3rd resistor.
Wherein, D/A conversion unit U3 includes the digital analog converter of one 10 bytes.
Wherein, which is I2C serial line interface, the I2C serial line interface include digital dock input interface SCL with
And data input output interface SDA, the digital dock input interface SCL and data input output interface SDA respectively with
The Logic control module 10 connects.
In some embodiments, it further includes a voltage management module 40, the voltage management which, which provides circuit,
The confession with the Logic control module 10, the first operational amplifier U1 and the AD conversion unit U3 respectively of module 40
Electric end connection to provide corresponding supply voltage respectively.
The present invention also provides a kind of display panels comprising the common voltage in above-mentioned any embodiment provides circuit.
The present invention is more to generate by the drive control module and common voltage generation module of common voltage offer circuit
The display quality of display panel can be improved in the different common voltage in road.
In conclusion although the present invention has been disclosed above in the preferred embodiment the common voltage provides circuit, but on
It states preferred embodiment to be not intended to limit the invention, those skilled in the art, is not departing from spirit and model of the invention
In enclosing, can make it is various change and retouch, therefore protection scope of the present invention subjects to the scope of the claims.
Claims (10)
1. a kind of common voltage provides circuit characterized by comprising
One Logic control module, for receiving external control signal and exporting the digital signal of presetting digit capacity；
One drive control module, connect and output multi-channel according to the digital signal with the output end of the Logic control module
Analog voltage signal；
One common voltage generation module, connect with the drive control module, and in the control of the multi-channel analog voltage signal
Make lower output multi-channel common voltage.
2. common voltage according to claim 1 provides circuit, which is characterized in that the drive control module includes N number of
The AD conversion unit of default position, the input terminal of each AD conversion unit connect respectively with the Logic control module with
For the digital signal to be converted into analog voltage signal, N is the integer greater than 2.
3. common voltage according to claim 2 provides circuit, which is characterized in that the common voltage generation module packet
It includes:
N number of first operational amplifier, the normal phase input end of N number of first operational amplifier respectively with N number of AD conversion unit
Output end connect correspondingly, it is single that the inverting input terminal of each first operational amplifier is separately connected one first partial pressure
Member；
N number of first field-effect tube, N number of first operational amplifier respectively with the grid of N number of first field-effect tube one by one
It is correspondingly connected, the source electrode of each first field-effect tube and the public affairs of corresponding first partial pressure unit and the first operational amplifier
Conode connection；
N number of second operational amplifier, the normal phase input end of N number of second operational amplifier and N number of first field-effect tube
Drain electrode connect correspondingly, the inverting input terminal of each second operational amplifier accesses feedback voltage, each described
The output end of second operational amplifier is for exporting common voltage all the way；
N number of setting unit, each setting unit public section with one first field-effect tube and second operational amplifier respectively
Point connection is to be arranged the common voltage that corresponding second operational amplifier exports.
4. common voltage according to claim 3 provides circuit, which is characterized in that the feedback voltage includes from display
Second feedback voltage of the first feedback voltage of panel itself and the output end from second operational amplifier；
The inverting input terminal of each second operational amplifier accesses first feedback voltage or second feedback voltage.
5. common voltage according to claim 4 provides circuit, which is characterized in that the N=3,3 second operations
The inverting input terminal of two second operational amplifiers of amplifier accesses first feedback voltage, and another second operation is put
The inverting input terminal of big device accesses second feedback voltage.
6. common voltage according to claim 3 provides circuit, which is characterized in that the setting unit includes first resistor
And reference voltage, the other end of the first resistor and second electricity are accessed in second resistance, one end of the first resistor
One end of resistance connects, the other end ground connection of the second resistance, common node, the institute of the first resistor and the second resistance
The first field-effect tube is stated to connect with the common node of second operational amplifier.
7. common voltage according to claim 3 provides circuit, which is characterized in that further include a voltage management module, institute
State voltage management module respectively with the Logic control module, first operational amplifier and the AD conversion unit
Feeder ear is connected to provide corresponding supply voltage respectively.
8. common voltage according to claim 2 provides circuit, which is characterized in that the D/A conversion unit includes 1
The digital analog converter of byte.
9. common voltage according to claim 1 provides circuit, which is characterized in that it further include an interface module, it is described to connect
Mouth mold block be I2C serial line interface, the I2C serial line interface include digital dock input interface and data input output interface,
The digital dock input interface and data input output interface connect respectively with the Logic control module.
10. a kind of display panel, which is characterized in that provide circuit including the described in any item common voltages of claim 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910379148.3A CN110148386A (en) | 2019-05-08 | 2019-05-08 | Common voltage provides circuit and display panel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910379148.3A CN110148386A (en) | 2019-05-08 | 2019-05-08 | Common voltage provides circuit and display panel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110148386A true CN110148386A (en) | 2019-08-20 |
Family
ID=67594104
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910379148.3A Pending CN110148386A (en) | 2019-05-08 | 2019-05-08 | Common voltage provides circuit and display panel |
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|---|---|
| CN (1) | CN110148386A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111640404A (en) * | 2020-06-10 | 2020-09-08 | 昆山龙腾光电股份有限公司 | Wide-narrow viewing angle switching circuit and display device thereof |
| CN114743517A (en) * | 2022-04-20 | 2022-07-12 | 深圳市华星光电半导体显示技术有限公司 | Common voltage supply circuit and display device |
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| US9548723B1 (en) * | 2013-03-01 | 2017-01-17 | Iml International | Current mode DVR or PVCOM with integrated impedances |
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| CN207663771U (en) * | 2017-08-30 | 2018-07-27 | 昆山龙腾光电有限公司 | Circuit occurs for common voltage |
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2019
- 2019-05-08 CN CN201910379148.3A patent/CN110148386A/en active Pending
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| CN1855212A (en) * | 2005-04-26 | 2006-11-01 | 恩益禧电子股份有限公司 | Display driver circuit and display apparatus |
| TW200939195A (en) * | 2008-03-14 | 2009-09-16 | Chi Mei Optoelectronics Corp | LCD and driving method thereof |
| CN101727850A (en) * | 2008-10-31 | 2010-06-09 | 奇景光电股份有限公司 | Source driver device and display device provided with source driver |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111640404A (en) * | 2020-06-10 | 2020-09-08 | 昆山龙腾光电股份有限公司 | Wide-narrow viewing angle switching circuit and display device thereof |
| CN111640404B (en) * | 2020-06-10 | 2022-06-14 | 昆山龙腾光电股份有限公司 | Wide-narrow viewing angle switching circuit and display device thereof |
| CN114743517A (en) * | 2022-04-20 | 2022-07-12 | 深圳市华星光电半导体显示技术有限公司 | Common voltage supply circuit and display device |
| CN114743517B (en) * | 2022-04-20 | 2023-10-13 | 深圳市华星光电半导体显示技术有限公司 | Common voltage supply circuit and display device |
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| SE01 | Entry into force of request for substantive examination | ||
| CB02 | Change of applicant information |
Address after: 9-2 Tangming Avenue, Guangming New District, Shenzhen City, Guangdong Province Applicant after: TCL China Star Optoelectronics Technology Co.,Ltd. Address before: 9-2 Tangming Avenue, Guangming New District, Shenzhen City, Guangdong Province Applicant before: Shenzhen China Star Optoelectronics Technology Co.,Ltd. |
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20190820 |
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| RJ01 | Rejection of invention patent application after publication |