CN108877628A - Discharge circuit, display device and the charging method of display device - Google Patents
Discharge circuit, display device and the charging method of display device Download PDFInfo
- Publication number
- CN108877628A CN108877628A CN201810781751.XA CN201810781751A CN108877628A CN 108877628 A CN108877628 A CN 108877628A CN 201810781751 A CN201810781751 A CN 201810781751A CN 108877628 A CN108877628 A CN 108877628A
- Authority
- CN
- China
- Prior art keywords
- node
- control
- module
- high level
- display device
- 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.)
- Granted
Links
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
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 invention discloses a kind of discharge circuits of display device, are connected to the high level node of display device, for discharging the charge of high level node, including：Voltage control module, node control module and discharge module；Discharge module is connected between control node and high level node and is grounded, the current potential of voltage control module, node control module control control node；When control node and the voltage difference of high level node are higher than threshold voltage, the charge of high level node is discharged by discharge module to ground；High level node is pulled low to ground potential when display device is restarted by the discharge circuit of the display device of that present invention, and the voltage of high level node is avoided not to be reduced to the caused timing of shutdown voltage or less abnormal；The invention also discloses display devices and its charging method including above-mentioned discharge circuit.
Description
Technical field
The present invention relates to field of display technology more particularly to a kind of discharge circuits of display device, display device and electric discharge
Method.
Background technique
It is brilliant as the film of semiconductor material with indium gallium zinc oxide (Indium Gallium Zinc Oxide, IGZO)
Body pipe has the characteristic of high electron mobility and low-leakage current, therefore is the problems such as solving shutdown charge residue in display device
There is its particular/special requirement in shutdown timing.The normal boot-strap timing and shutdown timing of IGZO display device are as depicted in figs. 1 and 2,
In, empty signal CLR and constant pressure high level VGH require slow power down when display device is shut down, electric in display panel to increase
The discharge time of lotus is to solve the problems, such as charge residue after shutdown.Therefore, as shown in figure 3, diode and capacitor frame can be passed through
Structure by constant pressure high level VGH processing be provide more stable high low potential the first high level VGH1 and can slow power down it is second high
Level VGH2, and by the first high level VGH1 and the second high level VGH2 incoming level converter (Level shift IC).
Under available circuit framework, power supply signal VIN power down (drop) feelings of recovery or high-speed switch machine afterwards such as occur
Condition, since power supply signal VIN power down at this time and power-on time interval are shorter, and as shown in figure 4, it cannot be guaranteed that incoming level is converted
Second high level signal VGH2 of device is normally reduced to ground potential GND before restarting.
When display device is restarted, power supply signal VIN is lifted, if the second high level VGH2 is still higher than the shutdown of level translator
Voltage UVLO (under voltage lock out), level translator do not detect the second high level VGH2 lower than shutdown electricity
UVLO is pressed, therefore cannot normally execute the timing of booting, so that it cannot when signal needed for normally sending out panel and booting
The charge discharge step of panel cannot be normally executed, is exported so as to cause the residual charge in panel to gated sweep driving circuit
(Gate Driver Monolithic, GDM) causes circuit malfunction or voltage management chip (Power IC) being taken out load greatly
It can be stopped exporting by circuit protection when electric current.
Summary of the invention
In order to solve the above technical problems, the present invention provides a kind of discharge circuit of display device, which is being switched on
When high level node is pulled low to ground potential, avoid the voltage of high level node from not being reduced to the caused booting of shutdown voltage or less
Timing is abnormal, and does not influence subsequent normal boot-strap timing, the invention also discloses the display device for including the discharge circuit and
Its charging method.
Technical solution provided by the invention is as follows：
The invention discloses a kind of discharge circuits of display device, the high level node of display device are connected to, for releasing
The charge of high level node is put, including：Voltage control module, node control module and discharge module, voltage control module, section
Point control module and discharge module are connected to control node；
The voltage control module inputs power supply signal, when the power supply signal rises to high level by low level, electricity
Press control module by the current potential of control node by Ground Electric Potential Rise to the first control voltage；
The node control module ground connection, when the current potential of the control node is higher than ground potential, the charge of control node
It is discharged by node control module to ground；
The discharge module connects the control node and high level node and the discharge module is grounded, and works as control node
When being higher than threshold voltage with the voltage difference of high level node, the charge of high level node is discharged by the discharge module to ground.
Preferably, the voltage control module includes first resistor, second resistance and control capacitor；
The first end of first resistor inputs power supply signal, the first end and control of the second end connection second resistance of first resistor
First pole plate of capacitor processed；The second end of second resistance is grounded；The second pole plate for controlling capacitor connects control node.
Preferably, the node control module includes 3rd resistor；The first end of 3rd resistor connects control node, third
The second end of resistance is grounded.
Preferably, the discharge module includes the first field-effect tube；The grid of first field-effect tube connects control node, the
The source electrode of one field-effect tube connects high level node, the grounded drain of the first field-effect tube.
Preferably, the discharge circuit of the display device further includes reverse protection module, described in the connection of reverse protection module
Control node and reverse protection module ground；
When the current potential of control node is higher than ground potential, reverse protection module is closed；
When the current potential of control node is lower than ground potential, reverse protection module opening is grounded control node.
Preferably, the reverse protection module includes first diode；The anode of first diode connects control node, the
The minus earth of one diode.
Invention additionally discloses a kind of display device, the discharge circuits of the display device including any of the above-described.
The invention also discloses a kind of charging methods of display device, applied to display device described in any of the above embodiments
Discharge circuit, which is characterized in that including step：
The first step：The received power supply signal of voltage control module institute rises to high level by low level, voltage control module
It charges to control node；Simultaneously when the node potential of control node is higher than ground potential, the charge of control node passes through node control
Molding block is gradually released into ground；Voltage control module and the collective effect of node control module make the current potential of control node one
The first control voltage is risen to by ground potential in the section time and is reduced to ground potential again；
During this period, the voltage difference of discharge module is connected control node and high level node is higher than within delay time
The charge of threshold voltage, high level node is discharged by discharge module to ground within the delay time；
Second step：The potential drop of high level node is closed down to ground potential, discharge module, and display device normally executes booting
Timing.
Compared with prior art, the present invention can bring at least one of following beneficial effect：
1, high level node is pulled low to ground potential in booting by the driving circuit of the display device of that present invention, even if quick
In the case where switching on and shutting down, it also can guarantee that level translator normally exports and panel is normally shown；
2, discharge module is closed after short time electric discharge, does not influence subsequent normal boot-strap timing；
3, reverse protection module is connected between control node and ground, avoids causing due to reverse coupled in down circuitry
Device failure.
Detailed description of the invention
Below by clearly understandable mode, preferred embodiment is described with reference to the drawings, the present invention is given furtherly
It is bright.
Fig. 1 is the booting timing diagram of existing oxide semiconductor display device；
Fig. 2 is the shutdown timing diagram of existing oxide semiconductor display device；
Fig. 3 is the circuit diagram that existing constant pressure high level processing circuit connects level translator；
Fig. 4 is the timing diagram of existing oxide semiconductor display device high-speed switch machine；
Fig. 5 is a kind of frame construction drawing of the discharge circuit of display device of the invention；
Fig. 6 is a kind of circuit diagram of the discharge circuit of display device of the invention；
Fig. 7 is the timing diagram of display device high-speed switch machine of the invention；
Fig. 8 is the discharge sequential diagram of the discharge circuit of display device shown in Fig. 6.
Specific embodiment
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, Detailed description of the invention will be compareed below
A specific embodiment of the invention.It should be evident that drawings in the following description are only some embodiments of the invention, for
For those of ordinary skill in the art, without creative efforts, it can also be obtained according to these attached drawings other
Attached drawing, and obtain other embodiments.
To make simplified form, part related to the present invention is only schematically shown in each figure, they are not represented
Its practical structures as product.Here, when being described as first element ' attach ' to second element, first element can be straight
It is connected to second element in succession, or is indirectly connected to second element by one or more add ons.Further, in order to clear
For the sake of, it is concisely omitted for fully understanding the present invention and is not required certain elements.
In the display device of based oxide semiconductor (in particular indium gallium zinc oxide), due to IGZO film crystal
The low characteristic of tube leakage current, it is complete for charge electric discharge in make to shut down post tensioned unbonded prestressed concrete scan drive circuit (GDM) and panel, it need to guarantee the
The decline of two high level VGH2 is slower.Therefore as shown in figure 3, high level signal VGH inputs high electricity via the second diode T2
Flat node netA, and the first high level signal VGH1 and the second high level signal VGH2 are respectively via first capacitor C1 and second
Constant pressure high level VGH processing is to provide the first high level VGH1 of more stable high low potential and can slowly fall by capacitor C2 ground connection
The second high level VGH2 incoming level converter again of electricity.Restore after power supply signal VIN power down or the case where high-speed switch machine
Under, the power down of power supply signal VIN and power-on time interval are shorter, as shown in figure 4, the second high level VGH2 may fail be switched on
Before be reduced to ground potential GND.Therefore, it is necessary to the discharge circuits of display device to put high level node netA before booting
Electricity makes the potential drop of high level node netA down to shutdown voltage UVLO.
As shown in figure 5, the discharge circuit of the display device of that present invention is connected to the high level node netA of display device, it is used for
Discharge the charge of high level node netA.Discharge circuit receives externally input power supply signal VIN, when power supply signal VIN is by low
When level rises to high level, discharge circuit, which carries out release to the charge of high level node netAn, makes high level node netAn's
Potential drop guarantees the feelings for restoring high level or high-speed switch machine afterwards in power supply signal VIN power down (drop) down to ground potential GND
Condition, the level translator that high level node netA is connected in display device can detect the second high level VGH2 and be located at shutdown electricity
Pressure UVLO is hereinafter, to normally execute the timing of booting.
Discharge circuit includes voltage control module 01, node control module 02 and discharge module 03, voltage control module
01 input power supply signal VIN, discharge module 03 are connected to the high level node netA of display device, voltage control module 01, section
Point control module 02 and discharge module 03 are connected to control node netB, and discharge module 01 and node control module 02 connect
Ground.
Voltage control module 01 inputs power supply signal VIN, when power supply signal VIN rises to high level by low level, electricity
Press control module 01 that control node netB is raised to the first control voltage by ground potential GND；As control node netB and height electricity
When the voltage difference of flat node netA is higher than threshold voltage vt h, discharge module 03 is opened, and the charge of high level node netA is by putting
The electric release of module 03 is extremely.And when the current potential of control node netB is higher than ground potential GND, the charge of control node netB passes through
Node control module 02 is gradually released into ground, so that the current potential of control node netB is risen by ground potential GND whithin a period of time
It is reduced to ground potential GND again to the first control voltage.It is only opened in delay time Td with controlling discharge module 03, guarantees electric discharge
Circuit does not influence subsequent normal display.
The discharge circuit of the display device of that present invention can also include reversely including module 04, one end of reverse protection module 04
Connect control node netB, other end ground connection.Reverse protection module 04 is avoided as caused by reverse coupled in down circuitry
Device failure.
The present invention is discussed in detail with specific embodiment below.
Embodiment one：
As shown in fig. 6, the discharge circuit of display device includes voltage control module 01, node control module in the present embodiment
02, discharge module 03 and reverse protection module 04, voltage control module 01 input power supply signal VIN, discharge module 03 and electricity
Flat turn parallel operation is connected to high level node netA, voltage control module 01, node control module 02, discharge module 03 and reversed
Protective module 04 is connected to control node netB, and node control module 02, discharge module 03 and reverse protection module 04 connect
Ground.
Voltage control module 01 includes first resistor R1, second resistance R2 and control capacitor CHP.The of first resistor R1
One end inputs power supply signal VIN, the first end and control capacitor C of the second end connection second resistance R2 of first resistor R2HP?
One pole plate；The second end of second resistance R2 is grounded；Control capacitor CHPThe second pole plate connect control node netB.Work as power supply signal
When VIN rises to high level by low level, first resistor R1 and first resistor R2 divide power supply signal VIN, control electricity
Hold CHPThe current potential of control node netB is raised to the first control voltage by ground potential GND by the coupling effect of capacitor.
Node control module 02 includes 3rd resistor RHP, 3rd resistor RHPFirst end connect control node netB, third
Resistance RHPSecond end ground connection.When the current potential of control node netB is higher than ground potential GND, the charge of control node netB passes through
3rd resistor RHPIt is gradually released into ground.
Discharge module 03 includes that the first field-effect tube M1, the first field-effect tube M1 is N-type field-effect tube, the first field-effect tube
The grid of M1 connects control node netB, and the source electrode of the first field-effect tube M1 connects high level node netA, the first field-effect tube
The grounded drain of M1.When the gate-source voltage of the first field-effect tube M1 it is poor (i.e. control node netB and high level node netA's
Voltage difference) be higher than the first field-effect tube M1 threshold voltage vt h1 when, the first field-effect tube M1 conducting, high level node netA's
Charge is discharged by the first field-effect tube M1 to ground.It should be noted that when discharge module 03 is made of the first field-effect tube M1
When, above-mentioned threshold voltage vt h1 is the threshold V T h1 of the first field-effect tube M1；When discharge module 03 is using other structures,
Above-mentioned threshold voltage vt h is determined by the specific structure of discharge module 03.
By adjusting first resistor R1, second resistance R2,3rd resistor RHPResistance value, control capacitor CHPCapacitance can be with
The maximum voltage value and charging and discharging speed of control node netB are controlled, so that the first field-effect tube M1 of control is only in delay time
It is opened in Td.As shown in figure 8, the drain current Ids of the first field-effect tube M1 is only greater than 0 in delay time Td, avoid influencing
Subsequent normal display.
Reverse protection module 04 includes first diode T1, and the anode of first diode T1 connects control node netB, the
The minus earth of one diode T1.When down circuitry, power supply signal VIN is reduced to low level, the first diode by high level
T1 is it is possible to prevente effectively from capacitance coupling effect makes control node netB reduce ground potential GND hereinafter, to avoid first effect
Should the grid voltage of pipe M1 the damage of field-effect tube is caused less than zero.
The invention also discloses a kind of display device, the discharge circuit including above-mentioned display device.
The charging method of the display device of that present invention includes the following steps：
The first step：Power supply signal VIN rises to high level by low level, and voltage control module 01 passes through control capacitor CHP's
Coupling effect charges to control node netB；Simultaneously when the node potential of control node netB is higher than ground potential GND, control section
The charge of point netB is gradually released into ground by node control module 02；Voltage control module 01 and node control module 02 are total to
Same-action the current potential of control node netB rise to the first control voltage by ground potential GND whithin a period of time to be reduced to again
Ground potential GND；
During this period, the voltage difference of discharge module 03 is connected control node netB and high level node netA are postponing
It is higher than threshold voltage vt h in time Td, the first field-effect tube M1 in discharge module 03 is opened in delay time Td, high level
The charge of node netA, to ground, makes the second high level VGH2 be reduced to ground potential as shown in Figure 7 by the release of discharge module 03
The drain current Ids of GND, the first field-effect tube M1 are as shown in Figure 8.
Second step：The potential drop of high level node netA down to ground potential GND, discharge module 03 close after discharge so that
Discharge circuit does not influence the work of subsequent voltage converter and the normal display of display device, and chip start signal XON rises to
Each circuit of chip normally starts work after high level, and display device normally executes booting timing.
It should be noted that above-described embodiment can be freely combined as needed.The above is only of the invention preferred
Embodiment, it is noted that for those skilled in the art, in the premise for not departing from the principle of the invention
Under, multiple improvements and modifications can also be made, these modifications and embellishments should also be considered as the scope of protection of the present invention.
Claims (8)
1. a kind of discharge circuit of display device is connected to the high level node of display device, for discharging high level node
Charge, which is characterized in that including：Voltage control module, node control module and discharge module, voltage control module, node
Control module and discharge module are connected to control node；
The voltage control module inputs power supply signal, when the power supply signal rises to high level by low level, voltage control
Molding block is by the current potential of control node by Ground Electric Potential Rise to the first control voltage；
The node control module ground connection, when the current potential of the control node is higher than ground potential, the charge of control node passes through
Node control module is discharged to ground；
The discharge module connects the control node and high level node and the discharge module is grounded, when control node and height
When the voltage difference of level node is higher than threshold voltage, the charge of high level node is discharged by the discharge module to ground.
2. the discharge circuit of display device according to claim 1, it is characterised in that：
The voltage control module includes first resistor, second resistance and control capacitor；
The first end of first resistor inputs power supply signal, the first end and control electricity of the second end connection second resistance of first resistor
The first pole plate held；The second end of second resistance is grounded；The second pole plate for controlling capacitor connects control node.
3. the discharge circuit of display device according to claim 1, it is characterised in that：
The node control module includes 3rd resistor；The first end connection control node of 3rd resistor, the second of 3rd resistor
End ground connection.
4. the discharge circuit of display device according to claim 1, it is characterised in that：
The discharge module includes the first field-effect tube；The grid of first field-effect tube connects control node, the first field-effect tube
Source electrode connect high level node, the grounded drain of the first field-effect tube.
5. the discharge circuit of display device according to claim 1, it is characterised in that：It further include reverse protection module, instead
The control node and reverse protection module ground are connected to protective module；
When the current potential of control node is higher than ground potential, reverse protection module is closed；
When the current potential of control node is lower than ground potential, reverse protection module opening is grounded control node.
6. the discharge circuit of display device according to claim 5, it is characterised in that：
The reverse protection module includes first diode；The anode of first diode connects control node, first diode
Minus earth.
7. a kind of display device, which is characterized in that the electric discharge electricity including the described in any item display devices of the claims 1-6
Road.
8. a kind of charging method of display device, the electric discharge applied to the described in any item display devices of the claims 1-6
Circuit, which is characterized in that including step：
The first step：The received power supply signal of voltage control module institute rises to high level by low level, and voltage control module is to control
Node charging processed；Simultaneously when the node potential of control node is higher than ground potential, the charge of control node passes through node control mould
Block is gradually released into ground；Voltage control module and the collective effect of node control module make the current potential of control node at one section
In the first control voltage risen to by ground potential be reduced to ground potential again；
During this period, the voltage difference of discharge module is connected control node and high level node is higher than threshold value within delay time
The charge of voltage, high level node is discharged by discharge module to ground within the delay time；
Second step：The potential drop of high level node is closed down to ground potential, discharge module, when display device normally executes booting
Sequence.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810781751.XA CN108877628B (en) | 2018-07-17 | 2018-07-17 | Discharge circuit of display device, display device and discharge method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810781751.XA CN108877628B (en) | 2018-07-17 | 2018-07-17 | Discharge circuit of display device, display device and discharge method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108877628A true CN108877628A (en) | 2018-11-23 |
| CN108877628B CN108877628B (en) | 2021-05-11 |
Family
ID=64302427
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810781751.XA Active CN108877628B (en) | 2018-07-17 | 2018-07-17 | Discharge circuit of display device, display device and discharge method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108877628B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110048476A (en) * | 2019-04-02 | 2019-07-23 | 深圳市稳先微电子有限公司 | A kind of battery protection driving circuit and battery protection drive system |
| CN110060647A (en) * | 2019-05-13 | 2019-07-26 | 深圳市华星光电技术有限公司 | Discharge circuit and display device including it |
| CN110611354A (en) * | 2019-10-11 | 2019-12-24 | 苏州浪潮智能科技有限公司 | Discharging structure and charging and discharging structure |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7109965B1 (en) * | 1998-09-15 | 2006-09-19 | Lg.Philips Lcd Co., Ltd. | Apparatus and method for eliminating residual image in a liquid crystal display device |
| CN1959784A (en) * | 2005-10-31 | 2007-05-09 | 恩益禧电子股份有限公司 | Driver device of plasma display panel |
| CN101000748A (en) * | 2006-01-10 | 2007-07-18 | 立锜科技股份有限公司 | Power circuit of grid drive circuit of thin film transistor liquid crystal display panel |
| CN101101385A (en) * | 2006-07-05 | 2008-01-09 | 群康科技(深圳)有限公司 | Discharge circuit and liquid crystal display device adopting the discharge circuit |
| JP2009037020A (en) * | 2007-08-02 | 2009-02-19 | Seiko Epson Corp | Image display device, projector and discharging method of residual charge |
| CN102842292A (en) * | 2011-06-24 | 2012-12-26 | 鸿富锦精密工业（深圳）有限公司 | Power supply management circuit and display device using same |
-
2018
- 2018-07-17 CN CN201810781751.XA patent/CN108877628B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7109965B1 (en) * | 1998-09-15 | 2006-09-19 | Lg.Philips Lcd Co., Ltd. | Apparatus and method for eliminating residual image in a liquid crystal display device |
| CN1959784A (en) * | 2005-10-31 | 2007-05-09 | 恩益禧电子股份有限公司 | Driver device of plasma display panel |
| CN101000748A (en) * | 2006-01-10 | 2007-07-18 | 立锜科技股份有限公司 | Power circuit of grid drive circuit of thin film transistor liquid crystal display panel |
| CN101101385A (en) * | 2006-07-05 | 2008-01-09 | 群康科技(深圳)有限公司 | Discharge circuit and liquid crystal display device adopting the discharge circuit |
| JP2009037020A (en) * | 2007-08-02 | 2009-02-19 | Seiko Epson Corp | Image display device, projector and discharging method of residual charge |
| CN102842292A (en) * | 2011-06-24 | 2012-12-26 | 鸿富锦精密工业（深圳）有限公司 | Power supply management circuit and display device using same |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110048476A (en) * | 2019-04-02 | 2019-07-23 | 深圳市稳先微电子有限公司 | A kind of battery protection driving circuit and battery protection drive system |
| CN110048476B (en) * | 2019-04-02 | 2023-05-16 | 西安稳先半导体科技有限责任公司 | Battery protection driving circuit and battery protection driving system |
| CN110060647A (en) * | 2019-05-13 | 2019-07-26 | 深圳市华星光电技术有限公司 | Discharge circuit and display device including it |
| CN110611354A (en) * | 2019-10-11 | 2019-12-24 | 苏州浪潮智能科技有限公司 | Discharging structure and charging and discharging structure |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108877628B (en) | 2021-05-11 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US10902931B2 (en) | Shift register unit and method for driving the same, gate driving circuit, and display apparatus | |
| US10636379B2 (en) | Shift register unit, method for driving the same, gate driving circuit and display device | |
| KR102538700B1 (en) | High voltage output driver with low voltage device | |
| CN103258495B (en) | Shifting deposit unit, shift register and display device | |
| KR101944641B1 (en) | Gate electrode drive circuit based on igzo process | |
| US9257083B2 (en) | Self-healing gate driving circuit having two pull-down holding circuits connected via a bridge circuit | |
| KR101944640B1 (en) | Gate electrode drive circuit based on igzo process | |
| CN108877628A (en) | Discharge circuit, display device and the charging method of display device | |
| CN106601176A (en) | Shift register unit circuit, driving method, shift register and display device | |
| CN104065251B (en) | There is the drive circuit of controlled gate discharge current | |
| CN106683631A (en) | GOA circuit of IGZO thin film transistor and display device | |
| CN105469763A (en) | Gate driving unit, gate driving circuit and display device | |
| CN207765146U (en) | GOA driving circuits and display device | |
| CN110504659B (en) | IGBT drive short-circuit protection detection circuit | |
| CN104392701A (en) | Scanning driving circuit used for oxide semiconductor thin film transistor | |
| CN104409055A (en) | Scanning driving circuit for oxide semiconductor thin film transistor | |
| CN108962165A (en) | A kind of circuit and method for eliminating IGZO display panel power down ghost | |
| CN109147641A (en) | Power-off ghost shadow eliminates circuit, shift register cell and display device | |
| CN108398981B (en) | A kind of control circuit of display device, display device and its control method | |
| CN107331418A (en) | Shift register and its driving method, gate driving circuit and display device | |
| CN108231022A (en) | Driving circuit and driving method, the liquid crystal display device of liquid crystal display device | |
| CN102184704A (en) | Shift buffer and driving method thereof | |
| CN107272478A (en) | Semiconductor device | |
| CN109215601A (en) | Voltage providing unit, method, display driver circuit and display device | |
| CN108962119B (en) | Level shift circuit, driving method thereof and display device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20200904 Address after: No.7 Tianyou Road, Qixia District, Nanjing City, Jiangsu Province Applicant after: NANJING CEC PANDA FPD TECHNOLOGY Co.,Ltd. Address before: Nanjing Crystal Valley Road in Qixia District of Nanjing City Tianyou 210033 Jiangsu province No. 7 Applicant before: NANJING CEC PANDA FPD TECHNOLOGY Co.,Ltd. Applicant before: NANJING CEC PANDA LCD TECHNOLOGY Co.,Ltd. Applicant before: Nanjing East China Electronic Information Technology Co.,Ltd. |
|
| TA01 | Transfer of patent application right | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |