CN109559702A - Public electrode voltages control circuit and driving method, display panel - Google Patents
Public electrode voltages control circuit and driving method, display panel Download PDFInfo
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- CN109559702A CN109559702A CN201910037045.9A CN201910037045A CN109559702A CN 109559702 A CN109559702 A CN 109559702A CN 201910037045 A CN201910037045 A CN 201910037045A CN 109559702 A CN109559702 A CN 109559702A
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
- G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
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- Crystallography & Structural Chemistry (AREA)
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- Theoretical Computer Science (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
- Liquid Crystal Display Device Control (AREA)
Abstract
The present invention relates to field of display technology, propose a kind of public electrode voltages control circuit, which includes trigger circuit, first switch circuit, second switch circuit.Trigger circuit connects Continuity signal end, frame start signal end, first node, for triggering the signal in frame start signal end for the signal continuous transmission at Continuity signal end to first node；The signal of public electrode voltages output end is transferred to second node by first switch circuit connection first node, public electrode voltages output end, second node, the signal for responding first node；Second switch circuit connection second node, shutdown detection signal end, public electrode, the signal of second node is transferred to public electrode by the first level signal for responding shutdown detection signal end, and stops the signal that the second node is transmitted to public electrode in response to the second electrical level signal at detection signal end of shutting down.The scintillation when disclosure can be to avoid liquid crystal display panel switching on and shutting down.
Description
Technical field
The present invention relates to field of display technology more particularly to a kind of public electrode voltages control circuit and driving method, show
Show panel.
Background technique
Liquid crystal display panel generally includes public electrode and driving electrodes, liquid crystal display panel can by public electrode with
Voltage difference between driving electrodes drives the liquid crystal between public electrode and driving electrodes to deflect, to realize display
Effect.
In the related technology, pixel-driving circuit is controlled by the gate drive signal of gate driving circuit to pass data-signal
Defeated to arrive driving electrodes, public electrode directly receives common voltage generation circuit and provides public voltage signal.
However, since data-signal and public voltage signal are controlled by different devices, in liquid crystal display panel shutdown and
When booting, the voltage control of public electrode and driving electrodes is asynchronous, to will lead to liquid crystal display panel in startup and shutdown
The abnormal phenomenon such as Shi Fasheng screen flicker.
It should be noted that the information in the invention of above-mentioned background technology part is only used for reinforcing the reason to background of the invention
Solution, therefore may include the information not constituted to the prior art known to persons of ordinary skill in the art.
Summary of the invention
The purpose of the present invention is to provide a kind of public electrode voltages control circuit and driving methods, display panel.The public affairs
When common electrode voltage control circuit is used to solve liquid crystal display panel startup and shutdown, due between public electrode and driving electrodes
Voltage control the problem of the displays exception such as flashing that is asynchronous and generating.
Other characteristics and advantages of the invention will be apparent from by the following detailed description, or partially by the present invention
Practice and acquistion.
According to an aspect of the present invention, a kind of public electrode voltages control circuit is provided, for controlling LCD display
The public electrode voltages of plate, the public electrode voltages control circuit include: trigger circuit, first switch circuit, second switch electricity
Road.Trigger circuit connects Continuity signal end, frame start signal end, first node, for triggering in the frame start signal end
Signal is by the signal continuous transmission at the Continuity signal end to the first node；First segment described in first switch circuit connection
Point, public electrode voltages output end, second node, the signal for responding the first node are defeated by the public electrode voltages
The signal of outlet is transferred to the second node；Second node described in second switch circuit connection, shutdown detection signal end, public
The signal of the second node is transferred to the public affairs by electrode, the first level signal for responding the shutdown detection signal end
Common electrode, and stop transmitting described the to the public electrode in response to the second electrical level signal at the shutdown detection signal end
The signal of two nodes.
In a kind of exemplary embodiment of the invention, the second switch circuit is also connected with half value analog voltage signal
End, the second switch circuit are also used to respond the second electrical level signal at the shutdown detection signal end to simulate the half value
The signal of voltage signal end is transferred to the public electrode.
In a kind of exemplary embodiment of the invention, the trigger circuit includes D flip-flop, the input of D flip-flop
End connection Continuity signal end, the end CP connect frame start signal end, and the end Q connects the first node.
In a kind of exemplary embodiment of the invention, the first switch circuit includes switch element, the control of switch element
End processed is connect with the first node, and first end is connect with the public electrode voltages output end, second end and second section
Point connection.
In a kind of exemplary embodiment of the invention, the second switch circuit includes data selector, data selector
Control terminal connect with the shutdown detection signal end, first input end is connect with the second node, the second input terminal and institute
The connection of half value analog voltage signal end is stated, output end is connect with the public electrode.
In a kind of exemplary embodiment of the invention, the liquid crystal display panel includes digital voltage signal end, described to lead
Messenger end shares the digital voltage signal end.
In a kind of exemplary embodiment of the invention, the shutdown detection signal end is when the liquid crystal display panel is switched on
First level signal is exported, the shutdown detection signal end exports second electricity when the liquid crystal display panel shuts down
Ordinary mail number.
According to an aspect of the present invention, a kind of display panel is provided, which includes above-mentioned public electrode electricity
Press control circuit.
In a kind of exemplary embodiment of the invention, the display panel further includes electrical level conversion chip, the common electrical
Pole tension control circuit is integrated in the electrical level conversion chip.
According to an aspect of the present invention, a kind of public electrode voltages control circuit driving method is provided, is applied to above-mentioned
Public electrode voltages control circuit, this method comprises:
In liquid crystal display panel booting, frame start signal triggers trigger circuit persistently to pass the signal at Continuity signal end
Defeated to arrive first node, the signal control first switch circuit of first node is the signal of public electrode voltages output end to be transferred to
Second node, and first level signal at shutdown detection signal end control second switch circuit for the signal of the second node
It is transferred to public electrode；
In liquid crystal display shutdown, the second electrical level signal at shutdown detection signal end controls the second switch circuit and stops
The signal of the second node is only transmitted to the public electrode.
The present invention provides a kind of public electrode voltages control circuit and driving method, display panel.The public electrode voltages
Control circuit is triggered when liquid crystal display panel is switched in frame start signal and in response to first electricity at detection signal end of shutting down
Public electrode voltages are transferred to public electrode by ordinary mail number；The public electrode voltages control circuit is shut down in liquid crystal display panel
When, stop transmitting public electrode voltages to the public electrode in response to the second electrical level signal for the detection signal that shuts down.Frame starting
Signal starts to export gate drive signal for control gate drive circuit, is charged, is closed with controlling data-signal to driving electrodes
Machine detection signal exports the first level signal under open state, exports second electrical level signal in the power-offstate.On the one hand, should
Public electrode voltages control circuit realizes liquid crystal display panel in startup and shutdown, data-signal and public voltage signal
Synchronously control；On the other hand, the circuit structure is simple, and cost is relatively low.
It should be understood that above general description and following detailed description be only it is exemplary and explanatory, not
It can the limitation present invention.
Detailed description of the invention
The drawings herein are incorporated into the specification and forms part of this specification, and shows and meets implementation of the invention
Example, and be used to explain the principle of the present invention together with specification.It should be evident that the accompanying drawings in the following description is only the present invention
Some embodiments for those of ordinary skill in the art without creative efforts, can also basis
These attached drawings obtain other attached drawings.
Fig. 1 is a kind of structural schematic diagram of exemplary embodiment of disclosure public electrode voltages control circuit；
Fig. 2 is a kind of structural schematic diagram of exemplary embodiment of disclosure public electrode voltages control circuit；
Fig. 3 is the timing diagram of each node in a kind of exemplary embodiment of disclosure electrode voltage control circuit；
Fig. 4 is the structural schematic diagram of disclosure public electrode voltages control circuit another kind exemplary embodiment；
Fig. 5 is the timing diagram of each node in disclosure electrode voltage control circuit another kind exemplary embodiment；
Fig. 6 is a kind of flow chart of exemplary embodiment of disclosure public electrode voltages control circuit driving method.
Specific embodiment
Example embodiment is described more fully with reference to the drawings.However, example embodiment can be real in a variety of forms
It applies, and is not understood as limited to example set forth herein；On the contrary, these embodiments are provided so that the present invention will more comprehensively and
Completely, and by the design of example embodiment comprehensively it is communicated to those skilled in the art.Identical appended drawing reference indicates in figure
Same or similar structure, thus the detailed description that them will be omitted.
Although the term of relativity, such as "upper" "lower" is used to describe a component of icon for another in this specification
The relativeness of one component, but these terms are in this manual merely for convenient, for example, with reference to the accompanying drawings described in show
The direction of example.It is appreciated that, if making it turn upside down the device overturning of icon, the component described in "upper" will
As the component in "lower".Term of other relativities, such as "high" " low " "top" "bottom" " left side " " right side " etc. are also made to have similar
Meaning.When certain structure is at other structures "upper", it is possible to refer to that certain structural integrity is formed in other structures, or refer to certain structure
It is " direct " to be arranged in other structures, or refer to that certain structure is arranged in other structures by the way that another structure is " indirect ".
Term "one", " one ", " described " to indicate there are one or more elements/component part/etc.；Term " packet
Include " and " having " to indicate the open meaning being included and refer to that the element/component part/in addition to listing waits it
Outside also may be present other element/component part/etc..
The present exemplary embodiment provides a kind of public electrode voltages control circuit first, for controlling liquid crystal display panel
Public electrode voltages, as shown in Figure 1, being a kind of structural representation of exemplary embodiment of disclosure public electrode voltages control circuit
Figure.The public electrode voltages control circuit includes: trigger circuit 1, first switch circuit 2, second switch circuit 3.Trigger circuit 1
Continuity signal end DVDD, frame start signal end STV, first node N1 are connected, for triggering in the frame start signal end STV's
Signal is by the signal continuous transmission of the Continuity signal end DVDD to the first node N1；First switch circuit 2 connects described
First node N1, public electrode voltages output end VCOM, second node N2, for responding the signal of the first node N1 for institute
The signal for stating public electrode voltages output end VCOM is transferred to the second node N2；Second switch circuit 3 connects described second
Node N2, shutdown detection signal end XAO, public electrode 4, for responding the first level letter of the shutdown detection signal end XAO
Number the signal of the second node N2 is transferred to the public electrode 4, and in response to the shutdown detection signal end XAO's
Second electrical level signal stops the signal that the second node N2 is transmitted to the public electrode.
The present exemplary embodiment provides a kind of public electrode voltages control circuit, and the public electrode voltages control circuit is in liquid
When LCD panel is switched on, trigger in frame start signal and in response to the first level signal for the detection signal end XAO that shuts down, it will
Public electrode voltages are transferred to public electrode；The public electrode voltages control circuit liquid crystal display panel shut down when, in response to
The second electrical level signal of shutdown detection signal stops transmitting public electrode voltages to the public electrode.Frame start signal is for controlling
Gate driving circuit processed starts to export gate drive signal, is charged with controlling data-signal to driving electrodes, and shut down detection signal
The first level signal is exported under open state, exports second electrical level signal in the power-offstate.On the one hand, public electrode electricity
Pressure control circuit realizes liquid crystal display panel in startup and shutdown, the synchronously control of data-signal and public voltage signal；
On the other hand, the circuit structure is simple, and cost is relatively low.
As shown in Fig. 2, being a kind of structural schematic diagram of exemplary embodiment of disclosure public electrode voltages control circuit.Its
In, the trigger circuit 1 may include D flip-flop, and the input terminal D connection Continuity signal end DVDD of D flip-flop, the end CP connects
It connects the frame start signal end end STV, Q and connects the first node N1.The first switch circuit 2 may include first switching element
T1, the control terminal of first switching element T1 are connect with the first node N1, first end and the public electrode voltages output end
VCOM connection, second end are connect with the second node N2.Second switch circuit 3 may include second switch element T2, and second
The control terminal of switch element T2 is connect with the shutdown detection signal end XAO, and first end is connect with second node N1, second end with
Public electrode 4 connects.It should be understood that in other exemplary embodiments, trigger circuit 1, first switch circuit, second switch
Circuit can also have more selection modes, for example, second switch circuit can also be alternative type data selector, the data
One input terminal of selector is connect with second node, another input terminal is not connected to any endpoint or connect with ground terminal, this
The protection scope of the disclosure is belonged to a bit.
As shown in figure 3, for the timing diagram of each node in a kind of exemplary embodiment of disclosure electrode voltage control circuit.The
One switch element T1 and second switch element T2 can be N-type transistor, detection signal end XAO output of shutting down under open state
First level signal can be high level signal, the second electrical level signal for detection signal end XAO output of shutting down in the power-offstate
It can be low level signal.The t1 moment indicates that booting moment, t2 moment indicate the shutdown moment, and VC indicates the electricity on public electrode
Pressure, VD indicate the voltage in driving electrodes.High level signal is exported in booting moment t1, frame start signal end STV, is originated in frame
The high level signal of the rising edge of signal end STV, frame start signal end STV acts on the end CP of D flip-flop, by Continuity signal
The high level signal of end DVDD is transferred to first node；First switching element T1 is controlled by the high level letter of Continuity signal end DVDD
Number the public voltage signal of public electrode voltages output end VCOM is transferred to second node N；Second switch element T2 is controlled by
The public voltage signal of public electrode voltages output end VCOM is transferred to public by the high level signal of shutdown detection signal end XAO
Electrode.During shutdown, the low level signal that second switch element T2 is controlled by shutdown detection signal end XAO stops to public electrode
Transmit the public voltage signal of common electrode voltage output end VCOM.
As shown in figure 3, the voltage VC on public electrode has different power down from the voltage VD in driving electrodes after shutdown
Speed.When the difference of the voltage VC on the public electrode and voltage VD in driving electrodes is greater than the driving voltage of liquid crystal, liquid crystal
Display panel will appear scintillation.
In the present exemplary embodiment, the second switch circuit 3 can also be connected with half value analog voltage signal end
HAVDD, the second switch circuit 3 can be also used for responding the second electrical level signal of the shutdown detection signal end XAO to incite somebody to action
The signal of half value analog voltage signal end HAVDD is transferred to the public electrode.Wherein, half value analog voltage signal end
HAVDD is the negative power end of the amplifier for outputting data signals, during shutdown, the signal at half value analog voltage signal end with
Data-signal power down speed having the same and similar voltage, therefore, during shutdown by the letter at half value analog voltage signal end
Number it is transferred to the problem of public electrode can further improve liquid crystal display panel flashing.
In this example embodiment, as shown in figure 4, for another exemplary implementation of disclosure public electrode voltages control circuit
The structural schematic diagram of example.The trigger circuit 1 may include D flip-flop, the input terminal D connection Continuity signal of D flip-flop
DVDD is held, the end CP connects the frame start signal end end STV, Q and connects the first node N1.The first switch circuit 2 can wrap
Include first switching element T1, the control terminal of first switching element T1 is connect with the first node N1, first end with it is described public
The VCOM connection of electrode voltage output end, second end are connect with the second node N2.The second switch circuit 3 is selected including data
Device is selected, the control terminal sel of data selector is connect with the shutdown detection signal end XAO, first input end a and second section
Point N2 connection, the second input terminal b are connect with half value analog voltage signal end HAVDD, output end out and the public electrode
Connection.
As shown in figure 5, for the timing diagram of each node in disclosure electrode voltage control circuit another kind exemplary embodiment.
First switching element T1 can be N-type transistor, and data selector can be alternative type data selector, under open state
It can be high level signal, detection signal end of shutting down in the power-offstate that the detection signal end XAO that shuts down, which exports the first level signal,
The second electrical level signal of XAO output can be low level signal.The t1 moment indicates that booting moment, t2 moment indicate the shutdown moment,
VC indicates that the voltage on public electrode, VD indicate the voltage in driving electrodes.It is defeated in booting moment t1, frame start signal end STV
High level signal out, in the rising edge of frame start signal end STV, the high level signal of frame start signal end STV acts on the touching of D type
The end CP for sending out device, is transferred to first node for the high level signal of Continuity signal end DVDD；First switching element T1, which is controlled by, to be led
The public voltage signal of public electrode voltages output end VCOM is transferred to second node by the high level signal of messenger end DVDD
N；Data selector is controlled by the high level signal of shutdown detection signal end XAO for the public of public electrode voltages output end VCOM
Voltage signal is transferred to public electrode.During shutdown, data selector is controlled by the low level signal of shutdown detection signal end XAO
The signal of half value analog voltage signal end HAVDD is transferred to public electrode.As shown in figure 5, during shutdown, on public electrode
Voltage VD power down rate having the same and similar voltage on voltage VC and driving electrodes, to further improve liquid crystal
The problem of showing panel flash.
In the present exemplary embodiment, the liquid crystal display panel includes digital voltage signal end, the Continuity signal end
DVDD can share the digital voltage signal end.
The present exemplary embodiment also provides a kind of display panel, which includes above-mentioned public electrode voltages control
Circuit.
The display panel and above-mentioned public electrode voltages control circuit skill having the same that the present exemplary embodiment provides
Art feature and working principle, above content have been described in detail, and details are not described herein again.
In the present exemplary embodiment, the display panel can also include electrical level conversion chip, the public electrode voltages
Control circuit can integrate in the electrical level conversion chip.
The present exemplary embodiment also provides a kind of public electrode voltages control circuit driving method, applied to above-mentioned public
Electrode voltage control circuit, as shown in fig. 6, being a kind of exemplary implementation of disclosure public electrode voltages control circuit driving method
The flow chart of example, this method comprises:
Step S1: in liquid crystal display panel booting, frame start signal triggers trigger circuit with by the letter at Continuity signal end
Number continuous transmission is to first node, and the signal control first switch circuit of first node is with by the letter of public electrode voltages output end
Number be transferred to second node, and shutdown detection signal end the first level signal control second switch circuit by second section
The signal of point is transferred to public electrode；
Step S2: in liquid crystal display shutdown, the second electrical level signal control described second at shutdown detection signal end is opened
Powered-down road stops the signal that the second node is transmitted to the public electrode.
Those skilled in the art after considering the specification and implementing the invention disclosed here, will readily occur to its of the disclosure
His embodiment.This application is intended to cover any variations, uses, or adaptations of the disclosure, these modifications, purposes or
Adaptive change follow the general principles of this disclosure and including the undocumented common knowledge in the art of the disclosure or
Conventional techniques.The description and examples are only to be considered as illustrative, and the true scope and spirit of the disclosure are by claim
It points out.
It should be understood that the present disclosure is not limited to the precise structures that have been described above and shown in the drawings, and
And various modifications and changes may be made without departing from the scope thereof.The scope of the present disclosure is only limited by the attached claims.
Claims (10)
1. a kind of public electrode voltages control circuit, for controlling the public electrode voltages of liquid crystal display panel, which is characterized in that
Include:
Trigger circuit connects Continuity signal end, frame start signal end, first node, for triggering in the frame start signal end
Signal by the signal continuous transmission at the Continuity signal end to the first node；
First switch circuit connects the first node, public electrode voltages output end, second node, for responding described
The signal of the public electrode voltages output end is transferred to the second node by the signal of one node；
Second switch circuit connects the second node, shutdown detection signal end, public electrode, detects for responding the shutdown
The signal of the second node is transferred to the public electrode by the first level signal for surveying signal end, and in response to the pass
The second electrical level signal at machine detection signal end stops the signal that the second node is transmitted to the public electrode.
2. public electrode voltages control circuit according to claim 1, which is characterized in that the second switch circuit also connects
It is connected to half value analog voltage signal end, the second switch circuit is also used to respond the second electrical level at the shutdown detection signal end
Signal is to be transferred to the public electrode for the signal at half value analog voltage signal end.
3. public electrode voltages control circuit according to claim 1 or 2, which is characterized in that the trigger circuit includes:
D flip-flop, input terminal connect Continuity signal end, and the end CP connects frame start signal end, and the end Q connects the first node.
4. public electrode voltages control circuit according to claim 1 or 2, which is characterized in that the first switch circuit
Include:
Switch element, control terminal are connect with the first node, and first end is connect with the public electrode voltages output end, and second
End is connect with the second node.
5. public electrode voltages control circuit according to claim 2, which is characterized in that the second switch circuit packet
It includes:
Data selector, control terminal are connect with the shutdown detection signal end, and first input end is connect with the second node, the
Two input terminals are connect with half value analog voltage signal end, and output end is connect with the public electrode.
6. public electrode voltages control circuit according to claim 1 or 2, which is characterized in that the liquid crystal display panel
Including digital voltage signal end, the Continuity signal end shares the digital voltage signal end.
7. public electrode voltages control circuit according to claim 1 or 2, which is characterized in that the shutdown detection signal
End exports first level signal in liquid crystal display panel booting, and the shutdown detection signal end is in the liquid crystal
The second electrical level signal is exported when showing panel shutdown.
8. a kind of display panel, which is characterized in that including the described in any item public electrode voltages control electricity of claim 1-7
Road.
9. display panel according to claim 8, which is characterized in that it further include electrical level conversion chip, the public electrode
Voltage control circuit is integrated in the electrical level conversion chip.
10. a kind of public electrode voltages control circuit driving method, using the described in any item public electrode electricity of claim 1-7
Press control circuit characterized by comprising
In liquid crystal display panel booting, frame start signal triggers trigger circuit to arrive the signal continuous transmission at Continuity signal end
First node, the signal control first switch circuit of first node is to be transferred to second for the signal of public electrode voltages output end
Node, and the first level signal control second switch circuit at shutdown detection signal end transmit the signal of the second node
To public electrode；
In liquid crystal display shutdown, the second electrical level signal at shutdown detection signal end control the second switch circuit stop to
The public electrode transmits the signal of the second node.
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| CN111048028A (en) * | 2019-12-24 | 2020-04-21 | Tcl华星光电技术有限公司 | Display device |
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| CN114005418A (en) * | 2021-10-29 | 2022-02-01 | 绵阳惠科光电科技有限公司 | Common voltage generation circuit, display panel drive circuit and display device |
| CN114420065A (en) * | 2020-10-28 | 2022-04-29 | 福州京东方光电科技有限公司 | Driving circuit, driving method thereof and display device |
| CN114708840A (en) * | 2022-03-31 | 2022-07-05 | 福州京东方光电科技有限公司 | Display driving method, driving circuit and display device |
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| CN114420065B (en) * | 2020-10-28 | 2023-08-08 | 福州京东方光电科技有限公司 | Driving circuit, driving method thereof and display device |
| CN113539204A (en) * | 2021-07-14 | 2021-10-22 | 北京京东方显示技术有限公司 | Common voltage output circuit, printed circuit board and display device |
| CN114005418A (en) * | 2021-10-29 | 2022-02-01 | 绵阳惠科光电科技有限公司 | Common voltage generation circuit, display panel drive circuit and display device |
| CN114005418B (en) * | 2021-10-29 | 2022-09-20 | 绵阳惠科光电科技有限公司 | Common voltage generating circuit, display panel driving circuit and display device |
| CN114708840A (en) * | 2022-03-31 | 2022-07-05 | 福州京东方光电科技有限公司 | Display driving method, driving circuit and display device |
| CN114708840B (en) * | 2022-03-31 | 2023-10-24 | 福州京东方光电科技有限公司 | Display driving method, driving circuit and display device |
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