CN110070816A - Display panel, drive circuit - Google Patents
Display panel, drive circuit Download PDFInfo
- Publication number
- CN110070816A CN110070816A CN201910270754.1A CN201910270754A CN110070816A CN 110070816 A CN110070816 A CN 110070816A CN 201910270754 A CN201910270754 A CN 201910270754A CN 110070816 A CN110070816 A CN 110070816A
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- China
- Prior art keywords
- display panel
- circuit
- low
- potential
- public electrode
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000001514 detection method Methods 0.000 abstract description 5
- 230000005611 electricity Effects 0.000 description 7
- 238000010586 diagram Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 3
- 238000005034 decoration Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2330/00—Aspects of power supply; Aspects of display protection and defect management
- G09G2330/02—Details of power systems and of start or stop of display operation
- G09G2330/027—Arrangements or methods related to powering off a display
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
Abstract
The present invention provides a kind of display panel, drive circuit comprising driving circuit, low potential circuit and control circuit, the driving circuit are used to provide public electrode voltages to display panel；The low potential circuit is used to provide low-potential voltage to the display panel, the control circuit is for detecting whether need to close the display panel, and when needed, the low potential circuit work is controlled, the public electrode voltages of the display panel are converted into the low-potential voltage；By increasing low potential circuit and control circuit, in display panel shutdown, the work of low potential circuit is controlled by the detection information that control circuit obtains, the public electrode voltages of display panel are converted into low-potential voltage, so that display panel is directly closed, ghost is avoided the occurrence of, solving existing display device there is technical issues that.
Description
Technical field
The present invention relates to display fields, more particularly, to a kind of display panel, drive circuit.
Background technique
In existing display device use process, when shutdown due to driving circuit discharge it is slower, when display device needs longer
Between discharge, cause shutdown after ghost need the long period that can just completely disappear.
So existing display device there is technical issues that.
Summary of the invention
The present invention provides a kind of display panel, drive circuit, and to solve existing display device, there are the technologies of power-off ghost shadow to ask
Topic.
To solve the above problems, technical solution provided by the invention is as follows:
The present invention provides a kind of display panel, drive circuit comprising driving circuit, low potential circuit and control circuit, institute
Driving circuit is stated for providing public electrode voltages to display panel；The low potential circuit is used to provide to the display panel
Low-potential voltage, the control circuit is for detecting whether need to close the display panel, and when needed, control described low
The public electrode voltages of the display panel are converted to the low-potential voltage by potential circuit work.
In display panel, drive circuit provided by the invention, the control circuit is electrically connected the voltage of the driving circuit
End, needs to close the display panel for judging whether according to the voltage value of the voltage end.
In display panel, drive circuit provided by the invention, when the voltage value becomes low potential from high potential, institute
It states control circuit judgement and needs to close the display panel.
In display panel, drive circuit provided by the invention, the output end of the control circuit electrical connection driving circuit,
For being judged whether to need to close the display panel according to the variation tendency of the public electrode voltages.
In display panel, drive circuit provided by the invention, when the variation tendency gradually becomes smaller, the control electricity
Road judgement needs to close the display panel.
In display panel, drive circuit provided by the invention, the signal output end electrical connection interface of the low potential circuit
The signal input part of connector, the public electrode voltages for will enter into the interface connector are directly reduced to the low potential
Voltage.
In display panel, drive circuit provided by the invention, the signal output end electrical connection interface of the low potential circuit
The public electrode voltages output end of the public electrode voltages output end of connector, the interface connector is electrically connected the display surface
Plate, the public electrode voltages for exporting the interface connector are directly reduced to the low-potential voltage.
In display panel, drive circuit provided by the invention, the low potential circuit includes a switching tube, described to open
The signal input part for closing pipe connects low-potential voltage, and the signal control terminal of the switching tube is electrically connected the control circuit, described
The signal output end of switching tube exports the low-potential voltage when the switching tube is opened.
In display panel, drive circuit provided by the invention, the switching tube is NMOS tube, the grid of the NMOS tube
The control circuit is connected, the source electrode of the NMOS tube connects low-potential voltage, and the drain electrode electrical connection of the NMOS tube is described aobvious
Show the public electrode voltages input terminal of panel.
In display panel, drive circuit provided by the invention, the switching tube is PMOS tube, the grid of the PMOS tube
The control circuit is connected, the drain electrode of the PMOS tube connects low-potential voltage, and the source electrode electrical connection of the PMOS tube is described aobvious
Show the public electrode voltages input terminal of panel.
The invention has the benefit that the present invention provides a kind of display panel, drive circuit comprising driving circuit, low electricity
Position circuit and control circuit, the driving circuit are used to provide public electrode voltages to display panel；The low potential circuit is used
In providing low-potential voltage to the display panel, the control circuit for detecting whether need to close the display panel,
And when needed, the low potential circuit work is controlled, the public electrode voltages of the display panel are converted to described low
Potential voltage；By increasing low potential circuit and control circuit, in display panel shutdown, the detection that is obtained by control circuit
Information controls the work of low potential circuit, the public electrode voltages of display panel is converted to low-potential voltage, so that display panel
It directly closes, avoids the occurrence of ghost, solving existing display device there is technical issues that.
Detailed description of the invention
It, below will be to embodiment or the prior art in order to illustrate more clearly of embodiment or technical solution in the prior art
Attached drawing needed in description is briefly described, it should be apparent that, the accompanying drawings in the following description is only some of invention
Embodiment for those of ordinary skill in the art without creative efforts, can also be attached according to these
Figure obtains other attached drawings.
Fig. 1 is existing display panel, drive circuit schematic diagram；
Fig. 2 is the first schematic diagram of display panel, drive circuit in the embodiment of the present invention；
Fig. 3 is the second schematic diagram of display panel, drive circuit in the embodiment of the present invention；
Fig. 4 is shutdown discharge curve comparison diagram.
Specific embodiment
The explanation of following embodiment is referred to the additional illustration, the particular implementation that can be used to implement to illustrate the present invention
Example.The direction term that the present invention is previously mentioned, such as [on], [under], [preceding], [rear], [left side], [right side], [interior], [outer], [side]
Deng being only the direction with reference to annexed drawings.Therefore, the direction term used be to illustrate and understand the present invention, rather than to
The limitation present invention.The similar unit of structure is with being given the same reference numerals in the figure.
The present invention there is technical issues that the embodiment of the present invention can solve this and ask for existing display device
Topic.
As shown in Figure 1, existing display panel, drive circuit generates public electrode voltages by driving circuit, i.e. in Fig. 1
VCOM, interface connector is electrically connected driving circuit and display panel, public electrode voltages passed to display panel, are being shown
It is relatively slow due to discharging in circuit when device shuts down, it will cause display panel and the long period needed to discharge, there is display device and close
The problem of machine ghost, for this problem, the embodiment of the present invention, provide following embodiment.
In one embodiment, as shown in Figure 2 and Figure 3, the embodiment of the present invention provides a kind of display panel, drive circuit 2,
Include:
Driving circuit 21, for providing public electrode voltages to display panel
Low potential circuit 23, for providing low-potential voltage to the display panel
Control circuit 22 controls the low potential for detecting whether needing to close the display panel, and when needed
The public electrode voltages of the display panel are converted to the low-potential voltage by circuit work.
In the present embodiment, the embodiment of the present invention provides a kind of display panel, drive circuit comprising driving circuit, low electricity
Position circuit and control circuit, the driving circuit are used to provide public electrode voltages to display panel；The low potential circuit is used
In providing low-potential voltage to the display panel, the control circuit for detecting whether need to close the display panel,
And when needed, the low potential circuit work is controlled, the public electrode voltages of the display panel are converted to described low
Potential voltage；By increasing low potential circuit and control circuit, in display panel shutdown, the detection that is obtained by control circuit
Information controls the work of low potential circuit, the public electrode voltages of display panel is converted to low-potential voltage, so that display panel
It directly closes, avoids the occurrence of ghost, solving existing display device there is technical issues that.
In one embodiment, as shown in Figure 2 and Figure 3, display panel, drive circuit 2 provided by the invention includes: driving electricity
Road 21, control circuit 22, low potential circuit 23, interface connector and display panel, 21 voltage end of driving circuit are equipped with power supply, drive
Public electrode voltages (i.e. VCOM in Fig. 2) are given to display panel by interface connector by dynamic circuit 21, keep display device aobvious
Show picture or closing, low potential circuit 23 provides low-potential voltage to display panel, wherein the low-potential voltage is that can set
The voltage that display panel completely closes, such as low-potential voltage are 0, and the control circuit 22 is for detecting whether need to close aobvious
Show panel, and when needed, controls the low potential circuit 23 and work, turn the received public electrode voltages of the display panel
It is changed to the low-potential voltage.
In one embodiment, as shown in Fig. 2, the control circuit 22 is electrically connected the voltage end of the driving circuit 21,
The signal input part of the signal output end electrical connection interface connector of the low potential circuit 23；In display device shutdown, control
Circuit processed detects that the voltage value of the voltage end becomes low potential from high potential, and judgement needs to close the display panel, so
Afterwards by controlling low potential circuit work, will enter into the interface connector public electrode voltages be directly reduced to it is described
Low-potential voltage, then it is low-potential voltage that interface connector, which is exported to the voltage of display panel, then display panel is directly closed, no
Can there are problems that display device power-off ghost shadow.
In one embodiment, as shown in figure 3, the control circuit 22 is electrically connected the output end of the driving circuit 21,
The public electrode voltages output end of the signal output end electrical connection interface connector of the low potential circuit 23 is closed in display device
When machine, the voltage value of the voltage end of driving circuit is reduced, and the control circuit detects the public electrode electricity of driving circuit output
Pressure variation tendency gradually decreases, so that it is straight to control the public electrode voltages that the low-potential voltage exports the interface connector
It connects and is reduced to the low-potential voltage, then the display panel is directly closed, the problem of avoiding the occurrence of display device power-off ghost shadow.
In one embodiment, as shown in Figure 2 and Figure 3, the low potential circuit 23 includes a switching tube 231, described to open
The signal input part for closing pipe 231 connects low-potential voltage VDD, and the signal control terminal of the switching tube 231 is electrically connected the control
Circuit, when closing the display panel, the signal output end of the switching tube 231 exports the low-potential voltage, makes to show
Device is directly closed, and ghost is avoided the occurrence of.
In one embodiment, the switching tube 231 is N type switch tube, such as NMOS tube, the grid connection of the NMOS tube
The control circuit, the source electrode of the NMOS tube connect low-potential voltage VDD, and the drain electrode of the NMOS tube is electrically connected the display
The public electrode voltages input terminal of panel.
In one embodiment, the switching tube 231 is p-type switching tube, such as PMOS tube, the grid connection of the PMOS tube
The control circuit, the drain electrode of the PMOS tube connect low-potential voltage VDD, and the source electrode of the PMOS tube is electrically connected the display
The public electrode voltages input terminal of panel.
As shown in figure 4, curve 1 is existing display panel, drive circuit electric discharge schematic diagram, curve 2 is that the invention shows panels
Driving circuit discharges schematic diagram, and voltage b indicates public electrode voltages when display panel shows picture, voltage a table in figure in figure
Show low-potential voltage when display panel completely closes, the public electrode voltages meeting during shutdown of existing display panel, drive circuit
It rapidly reduces, but a part of voltage can be remained, this portion voltage is discharged during subsequent release relatively slowly, so that display device
It will appear ghost, and public electrode voltages can rapidly be reduced to low-potential voltage to the present invention after shut down, close display device
It closes, ghost does not occur.
The circuit provided based on the above embodiment, in some embodiments, the present invention provides a kind of drivings of display panel
Method comprising following steps:
Driving circuit provides public electrode voltages to display panel；
Low potential circuit provides low-potential voltage to the display panel；
Control circuit detects whether to need to close the display panel, and when needed, controls the low potential circuit work
Make, the public electrode voltages of the display panel are converted into the low-potential voltage.
In some embodiments, the control circuit is electrically connected the voltage end of the driving circuit, the control circuit inspection
Survey whether to need the step of closing the display panel include: that control circuit according to the voltage value of the voltage end judges whether need
Close the display panel.
In some embodiments, the control circuit judges whether to need described in closing according to the voltage value of the voltage end
The step of display panel includes: when the voltage value becomes low potential from high potential, and the control circuit judgement needs to close
The display panel.
In some embodiments, the output end of the control circuit electrical connection driving circuit, the control circuit detection are
It is no to need the step of closing the display panel to include: control circuit to be according to the judgement of the variation tendency of the public electrode voltages
It is no to need to close the display panel.
In some embodiments, the control circuit judges whether needs according to the variation tendency of the public electrode voltages
The step of closing the display panel includes, and when the variation tendency gradually becomes smaller, the control circuit judgement needs to close
The display panel.
In some embodiments, the signal input of the signal output end electrical connection interface connector of the low potential circuit
The step of end, the low potential circuit provides low-potential voltage to the display panel includes: that the low potential circuit will input
Public electrode voltages to the interface connector are directly reduced to the low-potential voltage.
In some embodiments, the public electrode electricity of the signal output end electrical connection interface connector of the low potential circuit
Output end is pressed, the public electrode voltages output end of the interface connector is electrically connected the display panel, the low potential circuit
The step of providing low-potential voltage to the display panel includes: the public affairs that the low potential circuit exports the interface connector
Common-battery pole tension is directly reduced to the low-potential voltage.
In some embodiments, the low potential circuit includes a switching tube, and the signal input part of the switching tube connects
Low-potential voltage is connect, the signal control terminal of the switching tube is electrically connected the control circuit, the signal output end of the switching tube
It is electrically connected the public electrode voltages input terminal of the display panel, the low potential circuit provides low potential to the display panel
The step of voltage includes: to export low-potential voltage to the public electrode electricity of the display panel when the switching tube is opened
Press input terminal.
In some embodiments, the switching tube is NMOS tube, and the grid of the NMOS tube connects the control circuit, institute
The source electrode connection low-potential voltage of NMOS tube is stated, the drain electrode of the NMOS tube is electrically connected the public electrode voltages of the display panel
The step of input terminal, the control circuit controls low potential circuit work includes: the control circuit to the NMOS tube
Grid input high level signal low-potential voltage is exported public to the display panel so that the NMOS transistor conduction
Electrode voltage input terminal.
In some embodiments, the switching tube is PMOS tube, and the grid of the PMOS tube connects the control circuit, institute
The drain electrode connection low-potential voltage of PMOS tube is stated, the source electrode of the PMOS tube is electrically connected the public electrode voltages of the display panel
The step of input terminal, the control circuit controls low potential circuit work includes: the control circuit to the PMOS tube
Grid input low level signal low-potential voltage is exported public to the display panel so that the PMOS tube is connected
Electrode voltage input terminal.
According to above-described embodiment:
The embodiment of the present invention provides a kind of display panel, drive circuit comprising driving circuit, low potential circuit and control
Circuit, the driving circuit are used to provide public electrode voltages to display panel；The low potential circuit is used for the display
Panel provides low-potential voltage；The control circuit is for detecting whether need to close the display panel, and when needed, control
The low potential circuit work is made, the public electrode voltages of the display panel are converted into the low-potential voltage；Pass through
Increase low potential circuit and control circuit, in display panel shutdown, it is low that control circuit passes through the detection information control received
The public electrode voltages of display panel are converted to low-potential voltage, close display panel directly, avoid by potential circuit work
There is ghost in display device, by the way that control circuit to be electrically connected to the voltage end of driving circuit, by low-potential voltage electrical connection interface
The signal input part of connector, the public electrode voltages that can will enter into interface connector are directly reduced to low-potential voltage, from
And the voltage low-potential voltage for exporting interface connector, directly closing display panel, avoid display device from ghost occur；It is logical
It crosses by the output end of control circuit electrical connection driving circuit, by the public electrode voltages of low potential circuit electrical connection interface connector
Output end, so that control circuit controls the work of low potential circuit when the public electrode voltages of driving circuit output gradually become smaller,
The public electrode voltages that interface connector exports directly are reduced to low-potential voltage, directly closing display panel, display is avoided to fill
It sets and ghost occurs.
In conclusion although the present invention has been disclosed above in the preferred embodiment, but above preferred embodiment is not to limit
The system present invention, those skilled in the art can make various changes and profit without departing from the spirit and scope of the present invention
Decorations, therefore protection scope of the present invention subjects to the scope of the claims.
Claims (10)
1. a kind of display panel, drive circuit characterized by comprising
Driving circuit, for providing public electrode voltages to display panel；
Low potential circuit, for providing low-potential voltage to the display panel；
Control circuit controls the low potential circuit work for detecting whether needing to close the display panel, and when needed
Make, the public electrode voltages of the display panel are converted into the low-potential voltage.
2. display panel, drive circuit as described in claim 1, which is characterized in that the control circuit is electrically connected the driving
The voltage end of circuit needs to close the display panel for judging whether according to the voltage value of the voltage end.
3. display panel, drive circuit as claimed in claim 2, which is characterized in that become low from high potential in the voltage value
When current potential, the control circuit judgement needs to close the display panel.
4. display panel, drive circuit as described in claim 1, which is characterized in that the control circuit is electrically connected driving circuit
Output end, need to close the display panel for judging whether according to the variation tendency of the public electrode voltages.
5. display panel, drive circuit as claimed in claim 4, which is characterized in that when the variation tendency gradually becomes smaller,
The control circuit judgement needs to close the display panel.
6. display panel, drive circuit as described in claim 1, which is characterized in that the signal output end of the low potential circuit
The signal input part of electrical connection interface connector, the public electrode voltages for will enter into the interface connector are directly reduced to
The low-potential voltage.
7. display panel, drive circuit as described in claim 1, which is characterized in that the signal output end of the low potential circuit
The public electrode voltages output end of electrical connection interface connector, the public electrode voltages output end electrical connection of the interface connector
The display panel, the public electrode voltages for exporting the interface connector are directly reduced to the low-potential voltage.
8. display panel, drive circuit as described in any one of claim 1 to 7, which is characterized in that the low potential circuit packet
A switching tube is included, the signal input part of the switching tube connects low-potential voltage, and the signal control terminal of the switching tube is electrically connected
The control circuit is connect, the signal output end of the switching tube exports the low-potential voltage when the switching tube is opened.
9. display panel, drive circuit as claimed in claim 8, which is characterized in that the switching tube is NMOS tube, described
The grid of NMOS tube connects the control circuit, and the source electrode of the NMOS tube connects low-potential voltage, the drain electrode of the NMOS tube
It is electrically connected the public electrode voltages input terminal of the display panel.
10. display panel, drive circuit as claimed in claim 8, which is characterized in that the switching tube is PMOS tube, described
The grid of PMOS tube connects the control circuit, and the drain electrode of the PMOS tube connects low-potential voltage, the source electrode of the PMOS tube
It is electrically connected the public electrode voltages input terminal of the display panel.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910270754.1A CN110070816A (en) | 2019-04-04 | 2019-04-04 | Display panel, drive circuit |
| PCT/CN2019/085795 WO2020199302A1 (en) | 2019-04-04 | 2019-05-07 | Display panel driving circuit and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910270754.1A CN110070816A (en) | 2019-04-04 | 2019-04-04 | Display panel, drive circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110070816A true CN110070816A (en) | 2019-07-30 |
Family
ID=67367123
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910270754.1A Pending CN110070816A (en) | 2019-04-04 | 2019-04-04 | Display panel, drive circuit |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN110070816A (en) |
| WO (1) | WO2020199302A1 (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101320171A (en) * | 2007-06-08 | 2008-12-10 | 群康科技(深圳)有限公司 | LCD and method for improving power-off ghost |
| CN102005187A (en) * | 2009-09-03 | 2011-04-06 | 奇景光电股份有限公司 | Liquid Crystal Display and Its Driving Circuit |
| CN102446499A (en) * | 2010-10-08 | 2012-05-09 | 瀚宇彩晶股份有限公司 | Image sticking improvement circuit and method for liquid crystal display device |
| US20160181875A1 (en) * | 2013-08-06 | 2016-06-23 | Momentum Dynamics Corporation | Method of and apparatus for detecting coil alignment error in wireless inductive power transmission |
| CN108962165A (en) * | 2018-07-18 | 2018-12-07 | 南京熊猫电子制造有限公司 | A kind of circuit and method for eliminating IGZO display panel power down ghost |
-
2019
- 2019-04-04 CN CN201910270754.1A patent/CN110070816A/en active Pending
- 2019-05-07 WO PCT/CN2019/085795 patent/WO2020199302A1/en not_active Ceased
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101320171A (en) * | 2007-06-08 | 2008-12-10 | 群康科技(深圳)有限公司 | LCD and method for improving power-off ghost |
| CN102005187A (en) * | 2009-09-03 | 2011-04-06 | 奇景光电股份有限公司 | Liquid Crystal Display and Its Driving Circuit |
| CN102446499A (en) * | 2010-10-08 | 2012-05-09 | 瀚宇彩晶股份有限公司 | Image sticking improvement circuit and method for liquid crystal display device |
| US20160181875A1 (en) * | 2013-08-06 | 2016-06-23 | Momentum Dynamics Corporation | Method of and apparatus for detecting coil alignment error in wireless inductive power transmission |
| CN108962165A (en) * | 2018-07-18 | 2018-12-07 | 南京熊猫电子制造有限公司 | A kind of circuit and method for eliminating IGZO display panel power down ghost |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2020199302A1 (en) | 2020-10-08 |
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| PB01 | Publication | ||
| PB01 | Publication | ||
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| CB02 | Change of applicant information | ||
| CB02 | Change of applicant information |
Address after: 9-2 Tangming Avenue, Guangming New District, Shenzhen City, Guangdong Province Applicant after: TCL China Star Optoelectronics Technology Co.,Ltd. Address before: 9-2 Tangming Avenue, Guangming New District, Shenzhen City, Guangdong Province Applicant before: Shenzhen China Star Optoelectronics Technology Co.,Ltd. |
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| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20190730 |