CN108564926A - A kind of driving circuit and display device - Google Patents
A kind of driving circuit and display device Download PDFInfo
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- CN108564926A CN108564926A CN201810008700.3A CN201810008700A CN108564926A CN 108564926 A CN108564926 A CN 108564926A CN 201810008700 A CN201810008700 A CN 201810008700A CN 108564926 A CN108564926 A CN 108564926A
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- voltage
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- follower
- driving circuit
- common voltage
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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
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2320/00—Control of display operating conditions
- G09G2320/06—Adjustment of display parameters
- G09G2320/068—Adjustment of display parameters for control of viewing angle adjustment
Abstract
The present invention proposes that a kind of driving circuit, including voltage follower circuit, the first data selector and the second data selector, voltage follower circuit are all connected with the first data selector and the second data selector.Voltage follower circuit exports first choice voltage, the second selection voltage and third and selects voltage.First data selector receives first control signal and exports the first common voltage, and the second data selector receives second control signal and exports the second common voltage.The present invention also proposes a kind of display panel.A kind of driving circuit proposed by the present invention and display device, the first data selector is set to export the first common voltage by first control signal, and the second data selector is set to export the second common voltage by second control signal, with this to the voltage needed for display panel offer wide viewing angle or narrow viewing angle, realize the driving and switching at width visual angle, and preferable contrast can be obtained so that display image quality is more preferable.
Description
Technical field
The present invention relates to the technical field of liquid crystal display more particularly to a kind of driving circuit and display devices.
Background technology
Liquid crystal display device (liquid crystal display, LCD) has good, small, light-weight, the low drive of image quality
Dynamic voltage, low-power consumption, radiationless and relatively low manufacturing cost advantage, occupy an leading position in flat display field.Liquid crystal
Showing device includes opposed colored filter substrate (color filter, CF) and thin-film transistor array base-plate (TFT
) and sandwiched liquid crystal layer (LC layer) therebetween array.
Present liquid crystal display device gradually develops towards wide viewing angle direction, such as uses in-plane-switching mode (IPS) or edge
Wider visual angle may be implemented in the liquid crystal display device of field switch pattern (FFS).However, today's society people increasingly focus on
The privacy for protecting oneself has many things and does not like to take out and shares with people.In public, always wish that oneself is seeing the mobile phone
Or content is secrecy when browsing computer.Therefore, the display of single visual angle pattern cannot meet user's
Demand.Other than the demand of wide viewing angle, under the occasion for needing peep-proof, it is also desirable to display device can be switched or be adjusted
To narrow viewing angle pattern.But contrast of the existing width visual angle display screen under narrow viewing angle is poor, has directly influenced image quality
Display.
Invention content
In view of this, present invention aims at a kind of driving circuit of offer and display device, the driving at width visual angle is realized
And switching, obtain preferable contrast so that display image quality is more preferable.
The present invention provides a kind of driving circuit, including voltage follower circuit, the first data selector and the selection of the second data
Device.The voltage follower circuit is for exporting first choice voltage, the second selection voltage and third selection voltage, first choosing
It is direct current common voltage to select voltage, and the second selection voltage is more than the first choice voltage, and the third selection voltage is small
In the first choice voltage.First data selector selects first choice voltage, the second choosing according to first control signal
It selects voltage and third selects one of voltage voltage to be exported to display panel as the first common voltage, first control
Signal includes enable signal, off signal, viewing angle control signal and the first clock signal.Second data selector is according to
Two control signal behavior first choice voltages, second select voltage and third to select one of voltage voltage as the second public affairs
Common voltage is exported to the display panel, and the second control signal includes the enable signal, the off signal, described regards
Angle controls signal and the second clock signal, wherein second clock signal is that two constant amplitudes are anti-with first clock signal
The signal of phase.
Wherein, when driving circuit be used for drive display wide viewing angle the display panel when, first common voltage with
Second common voltage is first choice voltage；When driving circuit is used to drive the display panel of display narrow viewing angle
When, when showing n-th frame image, first common voltage is that described second to select voltage and second common voltage be institute
Third selection voltage is stated, when show the (n+1)th frame image, first common voltage is third selection voltage and described the
Two common voltages are the second selection voltage.
In one embodiment of the invention, the voltage follower circuit includes first resistor, second resistance.Described first
The first end of resistance, which receives, refers to high voltage, second end output the second selection voltage of the first resistor.Described second
The first end of resistance is connected with the second end of the first resistor, the second end ground connection of the second resistance.
In one embodiment of the invention, the voltage follower circuit includes 3rd resistor, the 4th resistance.The third
The first end of resistance receives half operating voltage, and the second end of the 3rd resistor exports the third and selects voltage.Described 4th
The first end of resistance is connected with the second end of the 3rd resistor, and the second end of the 4th resistance receives low reference voltage.
In one embodiment of the invention, the voltage follower circuit include first voltage follower, second voltage with
With device, tertiary voltage follower, wherein the first input end of the first voltage follower receives first choice voltage, described
The normal phase input end of first voltage follower receives direct current common voltage, the inverting input of the first voltage follower and institute
The output end for stating first voltage follower is connected, and the output end of the first voltage follower exports first choice voltage；It is described
The normal phase input end of second voltage follower is connected with the first end of second resistance, the anti-phase input of the second voltage follower
End is connected with the output end of the second voltage follower, output end output the second selection electricity of the second voltage follower
Pressure；The normal phase input end of the tertiary voltage follower is connected with the first end of the 4th resistance, the tertiary voltage follower
Inverting input is connected with the output end of the tertiary voltage follower, and the output end of the tertiary voltage follower exports third
Select voltage.
In one embodiment of the invention, first clock signal is square-wave signal.
In one embodiment of the invention, when the enable signal is low level, first data selector stops
Only export the first common voltage, second data selector stops the second common voltage of output.
In one embodiment of the invention, when the enable signal is high level and the off signal or the visual angle
When control signal is low level, first common voltage, second common voltage are the first choice voltage.
In one embodiment of the invention, when the enable signal, the off signal, the viewing angle control signal are equal
For high level when, first clock signal be high level then first common voltage be it is described second selection voltage, it is described
First clock signal is that then first common voltage is the third selection voltage to low level, and second clock signal is height
Then second common voltage is the second selection voltage to level, and second clock signal is low level then second public affairs
Common voltage is that the third selects voltage.
The present invention also provides a kind of display devices, including above-mentioned driving circuit and display panel, the driving circuit to carry
For exporting the first public pressure wire of first common voltage and exporting the second public pressure wire of second common voltage,
Pixel unit on the display panel is connected with a source data line, and public with first public pressure wire or second
Pressure-wire is connected, when show a frame image, the pixel unit connects on source data line polarity of voltage with connect
Polarity of voltage in first public pressure wire or the second public pressure wire is identical.
In one embodiment of the invention, m source data line is arranged in sequence on the display panel, with the 1st article
The connected pixel unit of source data line is connected with first public pressure wire, is connected with the 2nd article, the 3rd bar of source data line
Pixel unit be connected with second public pressure wire, the pixel unit being connected with the 4th article, the 5th bar of source data line and institute
It states the first public pressure wire to be connected, the pixel unit being connected with the 6th article, the 7th bar of source data line and second common voltage
Line be connected, and so on be attached.
Driving circuit provided by the invention and display device make the first data selector output the by first control signal
One common voltage, and so that the second data selector is exported the second common voltage by second control signal, give display panel with this
Voltage needed for wide viewing angle or narrow viewing angle is provided, realizes the driving and switching at width visual angle, and preferable contrast can be obtained,
So that display image quality is more preferable.
Description of the drawings
Fig. 1 is the circuit connection diagram of the driving circuit of one embodiment of the invention.
Fig. 2 is the output schematic diagram of the first data selector of one embodiment of the invention driving circuit.
Fig. 3 is the output schematic diagram of the second data selector of one embodiment of the invention driving circuit.
Fig. 4 is the connection diagram of the display device of one embodiment of the invention.
Fig. 5 for the pixel unit institute receiving voltage of the wide viewing angle pattern of one embodiment of the invention time diagram.
Fig. 6 for the pixel unit institute receiving voltage of the narrow viewing angle pattern of one embodiment of the invention time diagram.
Specific implementation mode
Further to illustrate that the present invention is the technological means and effect realized expected purpose and taken, below in conjunction with attached drawing
And preferred embodiment, to the specific implementation mode, method, step of the driving circuit of the width view angle switch proposed according to the present invention
Suddenly, structure, feature and effect are described in detail as after.
For the present invention aforementioned and other technology contents, feature and effect, in following cooperation with reference to the preferable reality of schema
Applying in the detailed description of example to be clearly presented.By the explanation of specific implementation mode, when expection can be reached to the present invention
The technological means and effect that purpose is taken be able to more deeply and it is specific understand, however shown attached drawing be only to provide with reference to
Purposes of discussion is not intended to limit the present invention.
Fig. 1 is the circuit connection diagram of the driving circuit of one embodiment of the invention.The driving circuit of the present embodiment, including
Voltage follower circuit 100, the first data selector 200 and the second data selector 300.Voltage follower circuit 100 is for exporting
It is that direct current is public that first choice voltage DCV1, the second selection voltage DCV2 and third, which select voltage DCV3, first choice voltage DCV1,
Common voltage DCVCOM, the second selection voltage DCV2 are more than first choice voltage DCV1, and third selects voltage DCV3 to be less than the first choosing
Select voltage DCV1.First data selector 200 is connected with voltage follower circuit 100, and the first data selector 200 is according to the first control
One of signal behavior first choice voltage DCV1, the second selection voltage DCV2 and third selection voltage DCV3 processed voltages are made
It is exported to display panel 400 for the first common voltage AC1, first control signal includes enable signal EN, off signal XON, regards
Angle controls signal HVA and the first clock signal V1.Second data selector 300 is connected with voltage follower circuit 100, the second data
Selector 300 selects first choice voltage DCV1, the second selection voltage DCV2 and third to select voltage according to second control signal
One of DCV3 voltages are exported as the second common voltage AC2 to display panel 400, and second control signal includes enabled letter
Number EN, off signal XON, viewing angle control signal HVA and the second clock signal V2, wherein when the second clock signal V2 and first
Sequential signal V1 is the signal of two constant amplitude reverse phases.
Wherein, when driving circuit is used to drive the display panel 400 for showing wide viewing angle, the first common voltage AC1 and the
Two common voltage AC2 are first choice voltage DCV1；When driving circuit is used to drive the display panel 400 of display narrow viewing angle
When, when showing n-th frame image, the first common voltage AC1 is that second to select voltage DCV2 and the second common voltage AC2 be third
Voltage DCV3 is selected, when showing the (n+1)th frame image, the first common voltage AC1 is that third selects voltage DCV3 and second is public
Voltage AC2 is the second selection voltage DCV2.
In one embodiment of the invention, voltage follower circuit 100 includes first resistor R1, second resistance R2.First
The first end of resistance R1, which can be, but not limited to receive, refers to high voltage VGH, second end output the second selection electricity of first resistor R1
Press DCV2.The first end of second resistance R2 is connected with the second end of first resistor R1, the second end of second resistance R2 can with but not
It is limited to be grounded.Wherein, first resistor R1, second resistance R2, with reference to high voltage VGH and ground terminal constitute an electric resistance partial pressure electricity
Road, by the way that the resistance value of first resistor R1 and second resistance R2 is arranged, the second selection voltage DCV2 that can make is more than first
Voltage DCV1 is selected, that is, is more than direct current common voltage DCVCOM.
In one embodiment of the invention, voltage follower circuit 100 includes 3rd resistor R3, the 4th resistance R4.Third
The first end of resistance R3 can be, but not limited to receive half operating voltage HAVDD, the second end output third selection of 3rd resistor R3
Voltage DCV3.The first end of 4th resistance R4 is connected with the second end of 3rd resistor R3, the second end of the 4th resistance R4 can with but
It is not limited to receive low reference voltage VGL.Wherein, 3rd resistor R3, the 4th resistance R4, half operating voltage HAVDD and the low electricity of reference
VGL is pressed to constitute a resistor voltage divider circuit, by the way that the resistance value of 3rd resistor R3 and the 4th resistance R4 is arranged, can make the
Three selection voltage DCV3 are less than first choice voltage DCV1, that is, are less than direct current common voltage DCVCOM.
In one embodiment of the invention, voltage follower circuit 100 include first voltage follower U1, second voltage with
With device U2, tertiary voltage follower U3, wherein the normal phase input end of first voltage follower U1 receives direct current common voltage
The inverting input of DCVCOM, first voltage follower U1 are connected with the output end of first voltage follower U1, first voltage with
With the output end output first choice voltage DCV1 of device U1.The normal phase input end of second voltage follower U2 is with second resistance R2's
First end is connected, and the inverting input of second voltage follower U2 is connected with the output end of second voltage follower U2, the second electricity
Press the second selection voltage of output end output DCV2 of follower U2.The normal phase input end and the 4th resistance of tertiary voltage follower U3
The first end of R4 is connected, and the inverting input of tertiary voltage follower U3 is connected with the output end of tertiary voltage follower U3, the
The output end output third selection voltage DCV3 of three voltage follower U3.Specifically, first voltage follower U1 is to tertiary voltage
Follower U3 is voltage follower, and voltage follower is the circuit that gain is equal to one, and output voltage follows input voltage,
The output impedance of voltage follower circuit 100 can be made to reduce, driving current increases, and driving capability enhancing, anti-interference ability increases,
To improve the reliability of voltage follower circuit 100.
Wherein, first voltage follower U1, second voltage follower U2, tertiary voltage follower U3 supply voltage can be with
But it is not limited to refer to high voltage VGH and low reference voltage VGL.
In one embodiment of the invention, the first clock signal V1 can be, but not limited to as square-wave signal, such as first
Clock signal V1 can be sine wave signal, sawtooth signal etc..Because of the second clock signal V2 and the first clock signal V1
For the signal of two constant amplitude reverse phases, so when the first clock signal V1 is square-wave signal, when the second clock signal V2 is with first
The square-wave signal of sequential signal V1 constant amplitude reverse phases.
In one embodiment of the invention, the output of the first data selector 200 is as shown in table 1.In table 1, preceding four row
The respectively enable signal EN, off signal XON, viewing angle control signal HVA and the first clock signal V1 of first control signal,
In, 0 indicates low level, and 1 indicates that high level, X indicate low level or high level, last be classified as the first common voltage AC1 and its
Voltage value.
Table 1：
Fig. 2 is the output schematic diagram of the first data selector 200 of one embodiment of the invention driving circuit.Fig. 2 is table 1
Waveform diagram, but it is not intended to limit enable signal EN, off signal XON, viewing angle control signal HVA and the first clock signal V1
Specific sequential.
The output of second data selector 300 is as shown in table 2.In table 2, preceding four row are respectively the enabled of second control signal
Signal EN, off signal XON, viewing angle control signal HVA and the second clock signal V2, wherein 0 indicates low level, and 1 indicates high electricity
Flat, X indicates low level or high level, last is classified as the second common voltage AC2 and its voltage value.
Table 2：
Fig. 3 is the output schematic diagram of the second data selector 300 of one embodiment of the invention driving circuit.Fig. 3 is table 2
Waveform diagram, but it is not intended to limit enable signal EN, off signal XON, viewing angle control signal HVA and the second clock signal V2
Specific sequential.
In the present embodiment, when enable signal EN is low level, the first data selector 200 stops the first common electrical of output
AC1, the second data selector 300 is pressed to stop the second common voltage AC2 of output.
In the present embodiment, when enable signal EN is high level and off signal XON is low level, the first common voltage
AC1, the second common voltage AC2 are first choice voltage DCV1, i.e. voltage value is direct current common voltage DCVCOM, be can be used for
When the TFT switch that the grid of display device connects is fully open, the charge of pixel unit is discharged.
In the present embodiment, when enable signal EN, off signal XON be high level, and viewing angle control signal HVA be low level
When, the first common voltage AC1, the second common voltage AC2 are first choice voltage DCV1, i.e. voltage value is direct current common voltage
DCVCOM.When driving shows the display panel 400 of wide viewing angle, the driving circuit of the present embodiment provides first choice voltage
DCV1, the second selection voltage DCV2, and make the source electrode number of the first common voltage AC1, the second common voltage AC2 and display device
Larger liquid crystal voltage VLC is formed according to the voltage on line.
In the present embodiment, when enable signal EN, off signal XON, viewing angle control signal HVA are high level, first
Common voltage AC1 is determined that specifically, the first clock signal V1 is high level then the first common voltage by the first clock signal V1
AC1 can be, but not limited to as the second selection voltage DCV2, the first clock signal V1 be that then the first common voltage AC1 can be with for low level
But it is not limited to third selection voltage DCV3；Second common voltage AC2 determines by the second clock signal V2, specifically, when second
Sequential signal V2 is that then the second common voltage AC2 can be, but not limited to as the second selection voltage DCV2, the second clock signal high level
V2 is that then the second common voltage AC2 can be, but not limited to select voltage DCV3 for third low level.Narrow viewing angle is shown in driving
When display panel 400, the driving circuit of the present embodiment provides first choice voltage DCV1, the second selection voltage DCV2, and makes
Voltage on the source data line of first common voltage AC1, the second common voltage AC2 and display device forms smaller liquid crystal electricity
Press VLC.
The driving circuit of the present embodiment makes the first data selector 200 export the first common electrical by first control signal
AC1 is pressed, and so that the second data selector 300 is exported the second common voltage AC2 by second control signal, display panel is given with this
400 provide the voltage needed for wide viewing angle or narrow viewing angle, realize the driving and switching at width visual angle.
Fig. 4 is the connection diagram of the display device of one embodiment of the invention.The embodiment of the present invention provides a kind of display dress
It sets, includes the driving circuit and display panel 400 of an above-mentioned embodiment, driving circuit provides the first common voltage AC1's of output
The second public pressure wire 420 of the second common voltage AC2 of first public pressure wire 410 and output includes cross on display panel 400
Multiple pixel units of vertical setting of types row, a row pixel unit is connected with same source data line, and with the first common electrical of same
Crimping 410 or the second public pressure wire 420 are connected, when showing a frame image, on the source data line of pixel unit connection
Polarity of voltage is identical as the polarity of voltage in the first public pressure wire 410 or the second public pressure wire 420 of connection.
In one embodiment of the invention, m source data line is arranged in sequence on display panel 400, with the 1st article of source
Pixel unit connected pole data line D1 is connected with the first public pressure wire 410, with the 2nd article of source data line D2, the 3rd article of source electrode
Pixel unit connected data line D3 is connected with the second public pressure wire 420, with the 4th article of source data line D4, the 5th article of source electrode number
It is connected with the first public pressure wire 410 according to the line D5 pixel units being connected, with the 6th article of source data line D6, the 7th article of source data
Pixel unit connected line D7 is connected with the second public pressure wire 420, and so on be attached.
Fig. 5 is the sequential of the pixel unit institute receiving voltage of the wide viewing angle pattern of one embodiment of the invention corresponding with Fig. 4
Schematic diagram.As can be seen that when driving shows the display panel 400 of wide viewing angle, the first common voltage AC1, the second common voltage AC2
For first choice voltage DCV1, that is, direct current common voltage DCVCOM, the source data line of the first common voltage AC1 and display device
On voltage D1 between, formed between voltage D2, D3 on the source data line of the second common voltage AC2 and display device it is larger
Liquid crystal voltage VLC.
Fig. 6 is the sequential of the pixel unit institute receiving voltage of the narrow viewing angle pattern of one embodiment of the invention corresponding with Fig. 4
Schematic diagram.As can be seen that when driving shows the display panel 400 of narrow viewing angle, first common voltage AC1 and the 1st article of source data
Voltage on line same phase always, and it is carried out at the same time reversion when showing next frame image, moreover, the second common voltage AC2 and the 2nd
Article, the same phase always of the voltage on the 3rd bar of source data line, and be carried out at the same time reversion when showing next frame image.In addition, first
Between voltage D1 on common voltage AC1 and the source data line of display device, the source of the second common voltage AC2 and display device
The liquid crystal voltage VLC formed between voltage D2, D3 on the data line of pole is smaller.
The display device of the present embodiment can be, but not limited to be normally black mode.The display panel of wide viewing angle is shown in driving
When 400, the viewing angle control signal HVA of driving circuit can be arranged to low level by user, pass through the first data selector 200 and
Two data selectors 300 make the first common voltage AC1 of output, the second common voltage AC2 be that first choice voltage DCV1 is i.e. straight
Flow common voltage DCVCOM so that on the source data line of the first common voltage AC1, the second common voltage AC2 and display device
Voltage can form larger liquid crystal voltage VLC, to which when driving shows wide viewing angle, the picture of display device is white picture
And visual angle is very big.
When driving shows the display panel 400 of narrow viewing angle, user can be by the viewing angle control signal HVA settings of driving circuit
At high level, the first common voltage AC1, second are exported by the first data selector 200 and the second data selector 300 respectively
Common voltage AC2, and the first common voltage AC1 determines that the second selection voltage DCV2 of output or third are selected by the first clock signal V1
It selects voltage DCV3, the second common voltage AC2 and determines that the second selection voltage DCV2 of output or third are selected by the second clock signal V2
Voltage DCV3.And in order to drive the display panel 400 of display narrow viewing angle, the electricity on the connected source data line of a pixel unit
Pressure, tool consistent with the polarity of voltage in the first public pressure wire 410 or the second public pressure wire 420 that the pixel unit is connected
Body, is arranged in sequence with m source data line on display panel 400, on first common voltage AC1 and the 1st bar of source data line
Voltage same phase always, and reversion is carried out at the same time when showing next frame image, second common voltage AC2 and the 2nd article, the 3rd article
Voltage on source data line same phase always, and it is carried out at the same time reversion when showing next frame image, similarly, the first common electrical
AC1 and the voltage on the 4th article, the 5th bar of source data line same phase always are pressed, and is carried out at the same time instead when showing next frame image
Turn, the second common voltage AC2 and the voltage on the 6th article, the 7th bar of source data line same phase always, and is showing next frame image
When be carried out at the same time reversion, and so on complete m source data line connection.
For the present embodiment compared with narrow viewing angle technical solution in the prior art, the liquid crystal voltage VLC of the prior art is direct current
Common voltage DCVCOM and the difference in voltage on source data line, and the liquid crystal voltage VLC of the present embodiment is one frame image of display
When, the first common voltage AC1 or the second common voltage AC2 and the difference in voltage on source data line that pixel unit is connected can
Referring to Fig. 6, the present embodiment can obtain relatively small liquid crystal voltage VLC, and the electric field that liquid crystal voltage VLC is formed makes liquid crystal
Relatively small deflection occurs for molecule, and light leakage is also relatively small to occurring, this enables the display panel 400 of the present embodiment must
To preferable contrast, to obtain better display image quality.
Driving circuit provided by the invention and display device keep the first data selector 200 defeated by first control signal
Go out the first common voltage AC1, and so that the second data selector 300 is exported the second common voltage AC2 by second control signal, with
This provides the voltage needed for wide viewing angle or narrow viewing angle to display panel 400, realizes the driving and switching at width visual angle, and can obtain
To preferable contrast so that display image quality is more preferable.
The above described is only a preferred embodiment of the present invention, be not intended to limit the present invention in any form, though
So the present invention has been disclosed as a preferred embodiment, however is not limited to invent, any person skilled in the art,
It is not departing within the scope of inventive technique scheme, when the technology contents using the disclosure above make a little change or are modified to equivalent
The equivalent embodiment of variation, as long as being without departing from inventive technique scheme content, the technical spirit according to invention is to above example
Made by any simple modification, equivalent change and modification, in the range of still falling within technical solution of the present invention.
Claims (10)
1. a kind of driving circuit, which is characterized in that including：
Voltage follower circuit (100), the voltage follower circuit (100) is for exporting first choice voltage (DCV1), the second choosing
Voltage (DCV2) and third selection voltage (DCV3) are selected, the first choice voltage (DCV1) is direct current common voltage
(DCVCOM), the second selection voltage (DCV2) is more than the first choice voltage (DCV1), and the third selects voltage
(DCV3) it is less than the first choice voltage (DCV1)；
First data selector (200), first data selector (200) select first choice electricity according to first control signal
Pressure (DCV1), second select voltage (DCV2) and third to select one of voltage (DCV3) voltage as the first common voltage
(AC1) to display panel (400), the first control signal includes enable signal (EN), off signal (XON), visual angle for output
Control signal (HVA) and the first clock signal (V1)；
Second data selector (300), second data selector (300) select first choice electricity according to second control signal
Pressure (DCV1), second select voltage (DCV2) and third to select one of voltage (DCV3) voltage as the second common voltage
(AC2) to the display panel (400), the second control signal includes the enable signal (EN), shutdown letter for output
Number (XON), the viewing angle control signal (HVA) and the second clock signal (V2), wherein second clock signal (V2) and institute
State the signal that the first clock signal (V1) is two constant amplitude reverse phases；
Wherein, when driving circuit is used to drive the display panel (400) of display wide viewing angle, first common voltage
(AC1) and second common voltage (AC2) is first choice voltage (DCV1)；When driving circuit is for driving display is narrow to regard
When the display panel (400) at angle, when showing n-th frame image, first common voltage (AC1) is second selection
Voltage (DCV2) and second common voltage (AC2) are that the third selects voltage (DCV3), are showing the (n+1)th frame image
When, it is described that first common voltage (AC1) selects voltage (DCV3) and second common voltage (AC2) for the third
Second selection voltage (DCV2).
2. driving circuit as described in claim 1, which is characterized in that the voltage follower circuit (100) includes first resistor
(R1), second resistance (R2)；
The first end of the first resistor (R1), which receives, refers to high voltage (VGH), and the second end of the first resistor (R1) exports
The second selection voltage (DCV2)；
The first end of the second resistance (R2) is connected with the second end of the first resistor (R1), the second resistance (R2)
Second end is grounded.
3. driving circuit as claimed in claim 2, which is characterized in that the voltage follower circuit (100) includes 3rd resistor
(R3), the 4th resistance (R4)；
The first end of the 3rd resistor (R3) receives half operating voltage (HAVDD), and the second end of the 3rd resistor (R3) is defeated
Go out the third selection voltage (DCV3)；
The first end of 4th resistance (R4) is connected with the second end of the 3rd resistor (R3), the 4th resistance (R4)
Second end receives low reference voltage (VGL).
4. driving circuit as claimed in claim 3, which is characterized in that the voltage follower circuit (100) includes first voltage
Follower (U1), second voltage follower (U2), tertiary voltage follower (U3), wherein；
The normal phase input end of the first voltage follower (U1) receives direct current common voltage (DCVCOM), the first voltage with
It is connected with the output end of the first voltage follower (U1) with the inverting input of device (U1), the first voltage follower
(U1) output end output first choice voltage (DCV1)；
The normal phase input end of the second voltage follower (U2) is connected with the first end of second resistance (R2), the second voltage
The inverting input of follower (U2) is connected with the output end of the second voltage follower (U2), the second voltage follower
(U2) the second selection voltage (DCV2) of output end output；
The normal phase input end of the tertiary voltage follower (U3) is connected with the first end of the 4th resistance (R4), the tertiary voltage
The inverting input of follower (U3) is connected with the output end of the tertiary voltage follower (U3), the tertiary voltage follower
(U3) output end output third selection voltage (DCV3).
5. driving circuit as described in claim 1, which is characterized in that first clock signal (V1) is square-wave signal.
6. driving circuit as described in claim 1, which is characterized in that described when the enable signal (EN) is low level
First data selector (200) stops the first common voltage of output (AC1), second data selector (300) stops output
Second common voltage (AC2).
7. driving circuit as claimed in claim 6, which is characterized in that when the enable signal (EN) is high level and the pass
When machine signal (XON) or the viewing angle control signal (HVA) they are low level, first common voltage (AC1), second public affairs
Common voltage (AC2) is the first choice voltage (DCV1).
8. driving circuit as claimed in claim 7, which is characterized in that when the enable signal (EN), the off signal
(XON), when the viewing angle control signal (HVA) is high level, first clock signal (V1) is high level then described the
One common voltage (AC1) is described second to select voltage (DCV2), and first clock signal (V1) is low level then described the
One common voltage (AC1) is that the third selects voltage (DCV3), and second clock signal (V2) is high level then described the
Two common voltages (AC2) are described second to select voltage (DCV2), and second clock signal (V2) is low level then described the
Two common voltages (AC2) are that the third selects voltage (DCV3).
9. a kind of display device, which is characterized in that including such as claim 1 to 8 any one of them driving circuit and display surface
Plate (400), the driving circuit provide the first public pressure wire (410) for exporting first common voltage (AC1) and output
The second public pressure wire (420) of second common voltage (AC2), the pixel unit and one on the display panel (400)
Bar source data line is connected, and is connected with the first public pressure wire (410) or the second public pressure wire (420), in one frame of display
When image, polarity of voltage on the source data line of pixel unit connection and the first public pressure wire (410) connecting or
Polarity of voltage in second public pressure wire (420) is identical.
10. display device as claimed in claim 9, which is characterized in that be arranged in sequence with m items on the display panel (400)
Source data line, the pixel unit being connected with the 1st bar of source data line is connected with first public pressure wire (410), with the 2nd
Article, the connected pixel unit of the 3rd bar of source data line be connected with second public pressure wire (420), with the 4th article, the 5th article of source
Data line connected pixel unit in pole is connected with first public pressure wire (410), with the 6th article, the 7th article of source data line phase
Even pixel unit be connected with second public pressure wire (420), and so on be attached.
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| CN110767193A (en) * | 2019-11-11 | 2020-02-07 | 昆山龙腾光电股份有限公司 | Alternating-current public voltage generating circuit and method and display device |
| CN111243537A (en) * | 2020-01-16 | 2020-06-05 | 昆山龙腾光电股份有限公司 | Common voltage generating circuit, method and display device |
| CN111429855A (en) * | 2020-04-03 | 2020-07-17 | 昆山龙腾光电股份有限公司 | Visual angle switching circuit and display device |
| CN112614467A (en) * | 2020-07-10 | 2021-04-06 | 友达光电股份有限公司 | Display device and driving method |
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| KR100419090B1 (en) * | 2001-02-19 | 2004-02-19 | 삼성전자주식회사 | Liquid crystal display device adapt to a view angle |
| KR101243789B1 (en) * | 2006-06-26 | 2013-03-18 | 엘지디스플레이 주식회사 | LCD and drive method thereof |
| KR101321166B1 (en) * | 2006-12-27 | 2013-10-22 | 엘지디스플레이 주식회사 | Liquid Crystal Display Device Capable of Controlling a Viewing Angle and Driving Method thereof |
| JP2010250265A (en) * | 2009-03-26 | 2010-11-04 | Sony Corp | Liquid crystal display device and electronic apparatus |
| KR101725341B1 (en) * | 2009-08-13 | 2017-04-11 | 삼성디스플레이 주식회사 | Liquid crsytal display |
| CN107144990B (en) * | 2017-06-07 | 2020-03-24 | 昆山龙腾光电股份有限公司 | Multi-view angle controllable liquid crystal display device and driving method |
| CN107219653B (en) * | 2017-07-26 | 2020-03-24 | 昆山龙腾光电股份有限公司 | Liquid crystal display device and driving module for switching wide and narrow visual angles thereof |
| CN107342063B (en) * | 2017-08-11 | 2020-12-01 | 昆山龙腾光电股份有限公司 | Common voltage driving circuit and display device |
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| CN110767193A (en) * | 2019-11-11 | 2020-02-07 | 昆山龙腾光电股份有限公司 | Alternating-current public voltage generating circuit and method and display device |
| CN111243537A (en) * | 2020-01-16 | 2020-06-05 | 昆山龙腾光电股份有限公司 | Common voltage generating circuit, method and display device |
| CN111243537B (en) * | 2020-01-16 | 2022-03-01 | 昆山龙腾光电股份有限公司 | Common voltage generating circuit, method and display device |
| CN111429855A (en) * | 2020-04-03 | 2020-07-17 | 昆山龙腾光电股份有限公司 | Visual angle switching circuit and display device |
| CN112614467A (en) * | 2020-07-10 | 2021-04-06 | 友达光电股份有限公司 | Display device and driving method |
| CN112614467B (en) * | 2020-07-10 | 2022-03-25 | 友达光电股份有限公司 | Display device and driving method |
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