CN108428437A - A kind of common voltage drive circuit and its control method, display device - Google Patents
A kind of common voltage drive circuit and its control method, display device Download PDFInfo
- Publication number
- CN108428437A CN108428437A CN201810292738.8A CN201810292738A CN108428437A CN 108428437 A CN108428437 A CN 108428437A CN 201810292738 A CN201810292738 A CN 201810292738A CN 108428437 A CN108428437 A CN 108428437A
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- power switch
- switch tube
- common voltage
- drive circuit
- voltage drive
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- 238000000034 method Methods 0.000 title claims abstract description 24
- 239000003990 capacitor Substances 0.000 claims description 9
- 230000005669 field effect Effects 0.000 claims description 4
- 230000000007 visual effect Effects 0.000 claims description 4
- 238000001514 detection method Methods 0.000 claims description 3
- 229910044991 metal oxide Inorganic materials 0.000 claims description 3
- 150000004706 metal oxides Chemical group 0.000 claims description 3
- 230000000630 rising effect Effects 0.000 claims description 3
- 239000004065 semiconductor Substances 0.000 claims description 3
- 239000004973 liquid crystal related substance Substances 0.000 abstract description 9
- 230000000694 effects Effects 0.000 abstract description 8
- 230000008569 process Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 230000005611 electricity Effects 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000008520 organization Effects 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
-
- 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)
- Liquid Crystal Display Device Control (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
Abstract
The invention discloses a kind of common voltage drive circuit and its control method, display device, the common voltage drive circuit includes the first power switch tube and the second power switch tube being connected in parallel；The first end of first power switch tube is connect with first control signal, and the second end of first power switch tube is connect with signal input part, and the third end of first power switch tube is connect with signal output end；The first end of second power switch tube is connect with second control signal, and the second end of second power switch tube is connect with signal output end, and the third end of second power switch tube is connect with ground terminal.Common voltage drive circuit disclosed by the invention and its control method, display device, by the power switch tube for controlling common voltage drive circuit, so that there are certain bias voltages for the common voltage of output, it solves the problems, such as existing charge residue or ghost when liquid crystal display device narrow viewing angle is switched to wide viewing angle, promotes user's vision viewing effect.
Description
Technical field
The present invention relates to display technology field more particularly to a kind of common voltage drive circuit and its control method, displays
Device.
Background technology
Since liquid crystal display device has many advantages, such as frivolous, energy saving, radiationless, it is now widely used for TV, a
People's computer, tablet computer, PDA (Personal Digital Assistant, personal digital assistant), mobile phone, digital camera etc.
In electronic equipment.
Liquid crystal display device has different operating modes, such as wide and narrow viewing angle modes etc..Liquid crystal display device is regarded from narrow
When angle is switched to wide viewing angle, the charge needs in display panel switch over, and user can be in brighter picture (such as white picture)
Lower discovery charge residue, or ghost (i.e. picture remains) is found under wide viewing angle, this makes user's vision viewing effect poor.
In view of the above-mentioned problems, existing solution is in width view angle switch, front end is blocked by sequence controller
System input signal is simultaneously forcibly inserted into black picture to solve.However the program the problem is that：It need to increase in sequence controller
Add MCU (Micro Controller Unit, micro-control unit), and sacrifice partial function is needed just to can be achieved, such as：ACC
(Accurate Color Calibration, accurate colour correction) function；In addition in the PSR (Panel of sequence controller
Self Refresh, self refresh signal) open after, being forcibly inserted into black picture can not solve the above problems.
Invention content
It is a primary object of the present invention to propose a kind of common voltage drive circuit and its control method, display device, purport
When solving the problem of that liquid crystal display device is switched to wide viewing angle from narrow viewing angle in the prior art, there are ghosts.
To achieve the above object, first aspect of the embodiment of the present invention provides a kind of common voltage drive circuit, described public
Voltag driving circuit includes the first power switch tube and the second power switch tube being connected in parallel；
The first end of first power switch tube is connect with first control signal, and the second of first power switch tube
End is connect with signal input part, and the third end of first power switch tube is connect with signal output end；
The first end of second power switch tube is connect with second control signal, and the second of second power switch tube
End is connect with signal output end, and the third end of second power switch tube is connect with ground terminal.
Optionally, the common voltage drive circuit further includes first resistor；
The first resistor is connected between the second end and the signal input part of first power switch tube.
Optionally, the common voltage drive circuit further includes second resistance and 3rd resistor；
The second resistance is connected between the second end and the signal output end of second power switch tube；
The 3rd resistor is connected between the first end and the second control signal of second power switch tube.
Optionally, the common voltage drive circuit further includes the 4th resistance and the 5th resistance；
One end of 4th resistance is connect with the signal input part, the other end and the signal of the 4th resistance
Output end connects；
One end of 5th resistance is connect with the signal output end, and the other end and the ground terminal of the 5th resistance connect
It connects.
Optionally, the common voltage drive circuit further includes adjustable resistance；
The first end of the adjustable resistance is connect with the 4th resistance, the second end of the adjustable resistance and the described 5th
Resistance connects, and the third end of the adjustable resistance is connect with the signal output end.
Optionally, the common voltage drive circuit further includes a filter capacitor；
Described filter capacitor one end is connect with the signal output end, and the other end of the filter capacitor is connect with ground terminal.
Optionally, first power switch tube and the second power switch tube are metal oxide semiconductor field effect tube
MOSFET。
In addition, to achieve the above object, second aspect of the embodiment of the present invention provides a kind of display device, which is characterized in that
The display device includes the common voltage drive circuit described in first aspect.
Furthermore to achieve the above object, the third aspect of the embodiment of the present invention provides a kind of control of common voltage drive circuit
Method processed, the method includes the steps：
Switching signal of the acquisition narrow viewing angle to wide viewing angle；
According to the switching signal, first control signal and second control signal are generated；
By the first control signal and second control signal of generation, it is respectively used to drive the common voltage drive circuit
First power switch tube and the second power switch tube.
Optionally, in the following manner obtain narrow viewing angle to wide viewing angle switching signal：
The rising edge signal or failing edge signal at detection mixing visual angle.
Common voltage drive circuit provided in an embodiment of the present invention and its control method, display device, it is public by controlling
The power switch tube of Voltag driving circuit so that the common voltage of output solves liquid crystal display there are certain bias voltage
Device narrow viewing angle is switched to when wide viewing angle the problem of existing charge residue or ghost, promotes user's vision viewing effect.
Description of the drawings
Fig. 1 is the common voltage drive circuit structural schematic diagram of the embodiment of the present invention；
Fig. 2 is another structural schematic diagram of common voltage drive circuit of the embodiment of the present invention；
Fig. 3 is the control method flow diagram of the common voltage drive circuit of the embodiment of the present invention；
Fig. 4 is the sequential organization schematic diagram of the common voltage drive circuit of the embodiment of the present invention.
The embodiments will be further described with reference to the accompanying drawings for the realization, the function and the advantages of the object of the present invention.
Specific implementation mode
The each embodiment of the present invention is realized in description with reference to the drawings.In subsequent description, using for indicating
The suffix of such as " module ", " component " or " unit " of element is only for being conducive to the explanation of the present invention, and there is no special for itself
Fixed meaning.
Context is violated unless the context indicates otherwise or obviously, in the context describing the invention (especially subsequent
Claim in) term that uses "one", " this " and similar deictic words include odd number and plural number.Unless otherwise note
It releases, term "comprising", " having ", " comprising " and " containing " can be construed to expansible term.
First embodiment
As shown in Figure 1, first embodiment of the invention provides a kind of common voltage drive circuit, the common voltage driving electricity
Road includes the first power switch tube Q1 and the second power switch tube Q2 being connected in parallel；
The first power switch tube Q1 first end (in figure 1 shown in, it is similar below) with first control signal Ctrl1
Connection, the second end of the first power switch tube Q1 are connect with signal input part AVDD, the first power switch tube Q1's
Third end is connect with signal output end Vcom；
The first end of the second power switch tube Q2 is connect with second control signal Ctrl2, second power switch
The second end of pipe Q2 is connect with signal output end Vcom, and the third end of the second power switch tube Q2 is connect with ground terminal.
In the present embodiment, first power switch tube and the second power switch tube are MOS field
Effect pipe (Metal-oxide Semiconductor Field Effect Transistor, MOSFET).Power switch tube
First end is the grid of MOSFET, and the second end of power switch tube is the drain electrode of MOSFET, and the third end of power switch tube is
The source electrode of MOSFET.MOSFET pipes in Fig. 1 and Fig. 2 are N-channel MOS FET pipes, it is envisaged that are obtained, in figure
MOSFET pipes also can be P-channel MOSFET pipes.
In one embodiment, the common voltage drive circuit further includes first resistor R1；
The first resistor R1 is connected on the second end of the first power switch tube Q1 and the signal input part AVDD
Between.
In one embodiment, the common voltage drive circuit further includes second resistance R2 and 3rd resistor R3；
The second resistance R2 is connected on the second end of the second power switch tube Q2 and the signal output end Vcom
Between；
The 3rd resistor R3 is connected on the first end of the second power switch tube Q2 and the second control signal
Between Ctrl2.
(in figure 11 shown in) can be integrated in one it should be noted that the first power switch tube Q1 and first resistor R1
It rises.Second power switch tube Q2, second resistance R2 and 3rd resistor R3 (in figure 12 shown in) may alternatively be integrated within together.
In one embodiment, the common voltage drive circuit further includes the 4th resistance R4 and the 5th resistance R5；
One end of the 4th resistance R4 is connect with the signal input part AVDD, the other end of the 4th resistance R4 with
The signal output end Vcom connections；
One end of the 5th resistance R5 is connect with the signal output end Vcom, the other end of the 5th resistance R5 with
Ground terminal connects.
Shown in please referring to Fig.2, further, in this embodiment, the common voltage drive circuit further includes adjustable
Resistance VR；
The first end of the adjustable resistance VR is connect with the 4th resistance R4, the second end of the adjustable resistance VR and institute
The 5th resistance R5 connections are stated, the third end of the adjustable resistance VR is connect with the signal output end Vcom.
Further, the common voltage drive circuit further includes a filter capacitor C1；
The one end the filter capacitor C1 is connect with the signal output end Vcom, the other end and the ground of the filter capacitor C1
End connection.
In order to preferably illustrate the present embodiment, the control process of driving circuit is illustrated below in conjunction with Fig. 4：
HVA signals in Fig. 4 are mixing visual angle (Hybrid Viewing Angle, HVA) signal, and high level is narrow viewing angle
Signal, low level are wide viewing angle signal.
In the failing edge signal for detecting HVA, i.e., narrow viewing angle is switched to wide viewing angle, is generated by micro-control unit MCU
Signal Ctrl1 and control signal Ctrl2 are controlled, waveform can refer to as shown in the figure.Control signal Ctrl1 is for driving common electrical
The power switch tube Q1 of driving circuit, control signal Ctrl2 is pressed to be used to drive the power switch tube Q2 of common voltage drive circuit.
By controlling signal Ctrl1 and control signal Ctrl2 driving power switching tube Q1, Q2, common voltage Vcom presence
Certain bias voltage △ V+, △ V- make it shake up and down and play the role of improving picture remaining.Concrete numerical value can be according to improvement
Effect is determined, and this is not restricted.
Common voltage drive circuit provided in an embodiment of the present invention, by the power switch for controlling common voltage drive circuit
Pipe so that there are certain bias voltages for the common voltage of output, solve liquid crystal display device narrow viewing angle and are switched to wide viewing angle
When existing charge residue or the problem of ghost, promote user's vision viewing effect.
Second embodiment
Second embodiment of the invention provides a kind of display device, and the display equipment includes public described in first embodiment
Voltag driving circuit.
Display device provided in an embodiment of the present invention, by the power switch tube for controlling common voltage drive circuit so that
The common voltage of output there are certain bias voltage, solve liquid crystal display device narrow viewing angle be switched to it is existing when wide viewing angle
The problem of charge residue or ghost, promotes user's vision viewing effect.
3rd embodiment
With reference to Fig. 3, Fig. 3 is a kind of control method for common voltage drive circuit that third embodiment of the invention provides, public
Common voltage driving circuit can refer to content described in first embodiment.The method includes the steps：
The switching signal of S31, acquisition narrow viewing angle to wide viewing angle；
In the present embodiment, the rising edge signal of visual angle (Hybrid Viewing Angle, HVA) can be mixed by detection
Or failing edge signal acquisition narrow viewing angle is to the switching signal of wide viewing angle.
S32, according to the switching signal, generate first control signal and second control signal；
S33, first control signal and second control signal by generation are respectively used to drive the common voltage driving electricity
First power switch tube and the second power switch tube on road.
In order to preferably illustrate the present embodiment, the control process of driving circuit is said below in conjunction with Fig. 1, Fig. 2 and Fig. 4
It is bright：
HVA signals in Fig. 4 are mixing angle signals, and high level is narrow viewing angle signal, and low level is wide viewing angle signal.
In the failing edge signal for detecting HVA, i.e., narrow viewing angle is switched to wide viewing angle, is generated by micro-control unit MCU
Signal Ctrl1 and control signal Ctrl2 are controlled, waveform can refer to as shown in the figure.Control signal Ctrl1 for drive Fig. 1 or
The power switch tube Q1 of common voltage drive circuit in Fig. 2, control signal Ctrl2 are used to drive the work(of common voltage drive circuit
Rate switching tube Q2.
By controlling signal Ctrl1 and control signal Ctrl2 driving power switching tube Q1, Q2, common voltage Vcom presence
Certain bias voltage △ V+, △ V- make it shake up and down and play the role of improving picture remaining.Concrete numerical value can be according to improvement
Effect is determined, and this is not restricted.
The control method of common voltage drive circuit provided in an embodiment of the present invention, by controlling common voltage drive circuit
Power switch tube so that there are certain bias voltages for the common voltage of output, solve liquid crystal display device narrow viewing angle and cut
The problem of changing to when wide viewing angle existing charge residue or ghost promotes user's vision viewing effect.
It should be noted that herein, relational terms such as first and second and the like are used merely to a reality
Body or operation are distinguished with another entity or operation, are deposited without necessarily requiring or implying between these entities or operation
In any actual relationship or order or sequence.Moreover, the terms "include", "comprise" or its any other variant are intended to
Non-exclusive inclusion, so that the process, method, article or equipment including a series of elements is not only wanted including those
Element, but also include other elements that are not explicitly listed, or further include for this process, method, article or equipment
Intrinsic element.In the absence of more restrictions, the element limited by sentence "including a ...", it is not excluded that
There is also other identical elements in process, method, article or equipment including the element.
As described above according to the embodiment of the present invention, there is no all details of detailed descriptionthe for these embodiments, also not
Limit the specific embodiment that the invention is only described.Obviously, as described above, can make many modifications and variations.This explanation
These embodiments are chosen and specifically described to book, is in order to preferably explain the principle of the present invention and practical application, belonging to making
Technical field technical staff can utilize modification of the invention and on the basis of the present invention to use well.The present invention is only by right
The limitation of claim and its full scope and equivalent.
Claims (10)
1. a kind of common voltage drive circuit, which is characterized in that the common voltage drive circuit includes first be connected in parallel
Power switch tube and the second power switch tube；
The first end of first power switch tube is connect with first control signal, the second end of first power switch tube with
Signal input part connects, and the third end of first power switch tube is connect with signal output end；
The first end of second power switch tube is connect with second control signal, the second end of second power switch tube with
Signal output end connects, and the third end of second power switch tube is connect with ground terminal.
2. a kind of common voltage drive circuit according to claim 1, which is characterized in that the common voltage drive circuit
It further include first resistor；
The first resistor is connected between the second end and the signal input part of first power switch tube.
3. a kind of common voltage drive circuit according to claim 1, which is characterized in that the common voltage drive circuit
Further include second resistance and 3rd resistor；
The second resistance is connected between the second end and the signal output end of second power switch tube；
The 3rd resistor is connected between the first end and the second control signal of second power switch tube.
4. a kind of common voltage drive circuit according to claim 1, which is characterized in that the common voltage drive circuit
Further include the 4th resistance and the 5th resistance；
One end of 4th resistance is connect with the signal input part, and the other end and the signal of the 4th resistance export
End connection；
One end of 5th resistance is connect with the signal output end, and the other end of the 5th resistance is connect with ground terminal.
5. a kind of common voltage drive circuit according to claim 4, which is characterized in that the common voltage drive circuit
It further include adjustable resistance；
The first end of the adjustable resistance is connect with the 4th resistance, the second end of the adjustable resistance and the 5th resistance
Connection, the third end of the adjustable resistance is connect with the signal output end.
6. a kind of common voltage drive circuit according to claim 1, which is characterized in that the common voltage drive circuit
It further include a filter capacitor；
Described filter capacitor one end is connect with the signal output end, and the other end of the filter capacitor is connect with ground terminal.
7. a kind of common voltage drive circuit according to claim 1, which is characterized in that first power switch tube and
Second power switch tube is metal oxide semiconductor field effect tube MOSFET.
8. a kind of display device, which is characterized in that the display device includes that any common voltages of claim 1-7 are driven
Dynamic circuit.
9. a kind of control method of common voltage drive circuit as described in claim 1-7 is any, which is characterized in that the side
Method includes step：
Switching signal of the acquisition narrow viewing angle to wide viewing angle；
According to the switching signal, first control signal and second control signal are generated；
By the first control signal and second control signal of generation, it is respectively used to drive the first of the common voltage drive circuit
Power switch tube and the second power switch tube.
10. a kind of control method of common voltage drive circuit according to claim 9, which is characterized in that by following
Mode obtains narrow viewing angle to the switching signal of wide viewing angle：
The rising edge signal or failing edge signal at detection mixing visual angle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810292738.8A CN108428437B (en) | 2018-04-03 | 2018-04-03 | Public voltage driving circuit, control method thereof and display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810292738.8A CN108428437B (en) | 2018-04-03 | 2018-04-03 | Public voltage driving circuit, control method thereof and display device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108428437A true CN108428437A (en) | 2018-08-21 |
| CN108428437B CN108428437B (en) | 2021-02-19 |
Family
ID=63160313
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810292738.8A Active CN108428437B (en) | 2018-04-03 | 2018-04-03 | Public voltage driving circuit, control method thereof and display device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110675796A (en) * | 2019-09-25 | 2020-01-10 | 昆山龙腾光电股份有限公司 | Wide-narrow viewing angle switching circuit, display device and viewing angle control method |
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| CN108428437B (en) | 2021-02-19 |
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Address after: 215301, 1, Longteng Road, Kunshan, Jiangsu, Suzhou Applicant after: InfoVision Optoelectronics(Kunshan)Co.,Ltd. Address before: 215301, 1, Longteng Road, Kunshan, Jiangsu, Suzhou Applicant before: INFOVISION OPTOELECTRONICS (KUNSHAN) Co.,Ltd. |
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