CN106125425A - Display panels, its driving method and display device - Google Patents
Display panels, its driving method and display device Download PDFInfo
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- CN106125425A CN106125425A CN201610481428.1A CN201610481428A CN106125425A CN 106125425 A CN106125425 A CN 106125425A CN 201610481428 A CN201610481428 A CN 201610481428A CN 106125425 A CN106125425 A CN 106125425A
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/136—Liquid crystal cells structurally associated with a semi-conducting layer or substrate, e.g. cells forming part of an integrated circuit
- G02F1/1362—Active matrix addressed cells
- G02F1/136286—Wiring, e.g. gate line, drain line
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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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- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Nonlinear Science (AREA)
- General Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Mathematical Physics (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Optics & Photonics (AREA)
- Computer Hardware Design (AREA)
- Theoretical Computer Science (AREA)
- Liquid Crystal (AREA)
- Liquid Crystal Display Device Control (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
Abstract
The invention discloses a kind of display panels, its driving method and display device, display panels includes: plural number bar gate line and plural number data line, the a plurality of pixel cells being arranged in array that plural number bar gate line and plural number data line intersect to form, described gate line is divided into first group of gate line of identical bar number to n-th group gate line, and n is the natural number more than or equal to 2；Control unit, described control unit is connected with gate drivers, when performing shutdown action, first group of gate line is opened in order to n-th group gate line for controlling described scanner driver, wherein, n-th group gate line opens sequential than the n-th 1 groups of gate line unlatching sequential time delay Δ t, wherein, Δ t=CV/Ion, C is the electric capacity of pixel cell described in, V is the on-state voltage of pixel cell described in, and Ion is the ON state current of pixel cell described in, the invention also discloses its driving method and display device.
Description
Technical field
The present invention relates to technical field of liquid crystal display, particularly to a kind of display panels, its driving method and display
Device.
Background technology
Thin Film Transistor-LCD (thin film transistor-liquid crystal display, TFT-
LCD) display drives framework as shown in Figure 1: when start, power circuit (Power-IC) receives the startup voltage of high level
After VCC, output drives the high level voltage VGH of scan line, clock signal XON to scan line drive circuit (Gate Driver
IC), Gate Driver IC output to each scan line output VGH signal, opens the TFT switch of every one-row pixels successively,
Make corresponding pixel receive data (Data) signal voltage, thus show picture.
TFT-LCD is voltage maintenance display device, and each pixel during picture shows is required for keeping a certain amount of
Electric charge.After TFT-LCD shutdown, in pixel, the electric charge of residual will cause occurring on display screen afterimage.Here it is shutdown tide
The problem of nighttide.In order to avoid occurring remaining influence when TFT-LCD shuts down, needing when shutdown, the TFT opening all pixels opens
Close, the electric charge abrupt release remained in pixel, it is ensured that picture whole pixel has identical voltage and identical GTG, disappears
Impact except charge residue.
In order to solve the problems referred to above, the most often use XON Function mode as shown in Figure 2: when VCC voltage reduces
During to certain value, XON signal is become low level by high level, and Gate Driver IC receives low level XON signal, opens institute
Some TFT discharge, and reach the purpose of accelerated release in vitro electric charge.
During TFT-LCD shutdown, use XON Function mode as shown in Figure 2, i.e. open when shutdown all
TFT, discharges with accelerated charge, inevitably will produce the electric current Igh that surges.Igh is the biggest, the VGH of TFT-LCD panel periphery
Cabling is the most destroyed.Electric current of surging has a problem in that scan line high level VGH is the highest, flows into the electric current of scan line through TFT
Igh is the biggest；The size of TFT-LCD panel is the biggest, and Igh is the biggest；The resolution of TFT-LCD panel is the highest, and Igh is the biggest.
The generation of electric current of surging can cause the burning of distribution, device selects the problems such as limited.Surge in solution shutdown at present
In current problems, mostly from changing Driver IC inside structure.Change Driver IC inside structure, the exploitation of circuit chip and
Checking cost is the highest.Also have plenty of and increase circuit on the glass substrate, amendment array base palte cabling (Wire on Array, WOA)
Mode overcome.Changing array base palte cabling, exploitation and the checking cost of TFT-LCD are the highest.
Summary of the invention
For overcoming above-mentioned defect of the prior art, the technical problem to be solved is: provide one abatement liquid
Crystal panel shutdown is surged the display panels of electric current, its driving method and display device, goes out during to solve liquid crystal panel shutdown
Existing height surge electric current destroy problem.
For reaching above-mentioned purpose, the present invention proposes a kind of display panels, including: plural number bar gate line and plural number bar
The a plurality of pixel cells being arranged in array that data wire, plural number bar gate line and plural number data line intersect to form, described grid
Polar curve is divided into first group of gate line of identical bar number to n-th group gate line, and n is the natural number more than or equal to 2；Control unit, institute
State control unit to be connected with gate drivers, when performing shutdown action, be used for controlling described scanner driver and open in order
First group of gate line is to n-th group gate line, and wherein, n-th group gate line is opened sequential and opened sequential time delay than (n-1)th group of gate line
Δ t, wherein, Δ t=CV/Ion, C are the electric capacity of pixel cell described in one, and V is the on-state voltage of pixel cell, Ion described in one
It it is the ON state current of pixel cell described in.
Further, described gate line be divided into odd-numbered line first group of gate line and second group of gate line of even number line,
When performing shutdown action, the first scan drive cell and second scanning of the described control unit described scanner driver of control are driven
Moving cell opens described first group of gate line and second gate line the most in order, and wherein, second group of gate line opens sequential ratio
First group of gate line opens sequential time delay Δ t.
On the one hand, described control circuit includes the first comparator and the second comparator, one end input electricity of the first comparator
Source voltage vcc, the other end inputs the first comparison voltage V1, and outfan connects the outfan of described first scan drive cell；The
One end input supply voltage Vcc of two comparators, the other end inputs the second comparison voltage V2, and outfan connects described second scanning
The outfan of driver element；Wherein, the first comparison voltage V1 be gate line open signal by voltage during high level step-down level,
Second comparison voltage V2 is the voltage that power source voltage Vcc declines the Δ t time.
On the other hand, described control circuit includes power circuit and delay circuit, described power circuit output two-way grid
Opening signal, a road grid is opened signal and is inputted described first group of gate line, and it is described that grid described in another road opens signal input
Delay circuit, described delay circuit output delay time is that the grid of Δ t opens signal to described second group of gate line.
Further, described delay circuit includes four reversers, a resistive element R and a capacity cell C, passes through
The value of R, C is set, determines Δ t time delay.
The invention allows for a kind of liquid crystal indicator, including above-mentioned display panels.
The present invention also been proposed the driving method of a kind of display panels, including: a display panels is provided, including
Answering of plural number bar gate line and plural number data line, plural number bar gate line and plural number being arranged in array of intersecting to form of data line
Several pixel cells, described gate line is divided into first group of gate line of identical bar number to n-th group gate line, and n is more than or equal to 2
Natural number；When performing shutdown action, control scanner driver by control unit and open first group of gate line in order to n-th
Group gate line, wherein, n-th group gate line is opened sequential and is opened sequential time delay Δ t, wherein, Δ t=CV/ than (n-1)th group of gate line
Ion, C are the electric capacity of pixel cell described in one, and V is the on-state voltage of pixel cell described in, and Ion is pixel cell described in
ON state current.
Further, described gate line be divided into odd-numbered line first group of gate line and second group of gate line of even number line,
When performing shutdown action, the first scan drive cell and second scanning of the described control unit described scanner driver of control are driven
Moving cell opens described first group of gate line and second gate line the most in order, and wherein, second group of gate line opens sequential ratio
First group of gate line opens sequential time delay Δ t.
Further, described control circuit includes the first comparator and the second comparator, one end input of the first comparator
Power source voltage Vcc, the other end inputs the first comparison voltage V1, and outfan connects the outfan of described first scan drive cell；
One end input supply voltage Vcc of the second comparator, the other end inputs the second comparison voltage V2, and outfan connects described second and sweeps
Retouch the outfan of driver element；Wherein, the first comparison voltage V1 is that gate line opens signal by electricity during high level step-down level
Pressure, the second comparison voltage V2 is the voltage that power source voltage Vcc declines the Δ t time；When performing shutdown action, power source voltage Vcc
Starting to reduce, when Vcc is reduced to the first comparison voltage V1, comparator work output, described control circuit controls described first
Scan drive cell opens described first group of gate line, and after postponing sequential Δ t, power source voltage Vcc is reduced to the second comparison
Voltage V2, described control circuit controls described first scan drive cell and opens described first group of gate line.
Further, described control circuit is power circuit and delay circuit, when performing shutdown action, and described power supply electricity
When the power source voltage Vcc of road output drops to certain numerical value, described power circuit output two-way grid opens signal, a road grid
Opening signal and input described first group of gate line, grid described in another road is opened signal and is inputted described delay circuit, described delay
Circuit output delay time is that the grid of Δ t opens signal to described second group of gate line.
The present invention compared with prior art, has an advantage in that: the circuit structure that the present invention provides is liquid crystal panel scanning line
It is divided into odd-numbered line and even number line two parts, by voltage comparator or resistance capacitance delay circuit, at a certain time interval
Respectively the high level open-circuit voltage of scan line is applied to odd-numbered line scan line, even number line scan line.Odd-line pixels or idol
The electric current of surging formed when several rows pixel is opened simultaneously is the half of the electric current of surging that all pixels are formed when opening simultaneously, so
The electric current of surging formed when the circuit structure that the present invention provides and driving method can shut down liquid crystal panel is down to half, thus
The shutdown of structured liquid crystal panel is surged the various electricity breakoff phenomenons that high-current leading rises.
Accompanying drawing explanation
Fig. 1 is the operating diagram of TFT-LCD scan line drive circuit；
Fig. 2 is XON Function operating diagram of the prior art；
Fig. 3 is the circuit framework schematic diagram of one embodiment of the invention；
Fig. 4 is the working timing figure of circuit framework in Fig. 3；
Fig. 5 is the circuit framework schematic diagram of further embodiment of this invention；
Fig. 6 is the circuit framework schematic diagram of delay circuit in Fig. 5；
Fig. 7 is the working timing figure of delay circuit in Fig. 5.
Detailed description of the invention
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Describe, it is clear that described embodiment is only a part of embodiment of the present invention rather than whole embodiments wholely.Based on
Embodiment in the present invention, it is every other that those of ordinary skill in the art are obtained under not making creative work premise
Embodiment, broadly falls into the scope of protection of the invention.
Fig. 3 is the circuit framework schematic diagram of one embodiment of the invention.As it is shown on figure 3, the present invention provides a kind of scan line
Drive circuit structure, all of scan line is divided into two groups of shutdown electric discharges, and discharge delay time is Δ t.At scanning line driving electricity
Lu Zhong, the passage of all of connection odd-numbered line scan line, the outfan at each passage arrange a comparison and with this ratio
To the on-off circuit A connected, comparison voltage is set to the first comparator voltage Vcomparsion1；All of connection even number line scans
The passage of line, the outfan at each passage arranges a comparison and the on-off circuit B being connected with this comparison, comparison voltage
It is set to Vcomparsion2.
Whole Comparison Circuit is made up of comparator A and comparator B, VCC as input voltage, Vcomparsion1 and
Vcomparsion2, as comparison voltage, exports the triggering as on-off circuit；On-off circuit and scan line drive circuit (Gate
Driver IC) outfan (Output) be connected, the output of Comparison Circuit is as control signal.
In figure 3, the selection standard of comparison voltage Vcomparsion1 and Vcomparsion2 is: Vcomparsion1 electricity
Pressure takes voltage when XON signal high level becomes low level, and Vcomparsion2 voltage takes VCC and declines the voltage of Δ t time.
The drives sequential of the present embodiment is as shown in Figure 4: when TFT-LCD shuts down, and input voltage VCC starts to reduce,
When VCC is reduced to the comparison voltage Vcomparsion1 set, comparator A works output, opens on-off circuit, XON signal
Being become low level by high level, Gate Driver IC exports Vgh voltage, opens GOUT2n electric discharge.After Δ t, VCC reduces
GOUT2n+1 electric discharge is opened to Vcomparsion2, comparator B output.So all scan lines of TFT-LCD are divided into two groups,
Open respectively.The electric current of surging that sequential time delay Δ t therein, TFT-LCD electric discharge produces will drop to original 1/2, thus
The impact of the electric current of surging that abatement shutdown produces.
Fig. 5 is the circuit framework schematic diagram of further embodiment of this invention.Unlike Fig. 3, the circuit frame of the present embodiment
Structure, has been directly integrated sequential time delay circuit function module in power circuit (Power IC).Delay circuit by four reversers,
One resistive element R and capacity cell C composition, by arranging the value of R, C, it may be determined that time delay Δ t.Delay circuit
Input signal be the XON1 signal that Power IC circuit produces, be output as the XON2 that time delay is Δ t, XON2 signal with
Gate Driver IC2 connects.
The drives sequential of the present embodiment is as shown in Figure 6: during shutdown, and VCC voltage declines, when dropping to certain numerical value
Time, XON1 signal is become low level by high level, and XON1 signal controls Gate Driver IC1 and opens all of TFT-LCD's
Odd-numbered line scan line is discharged.XON1 signal is through delay circuit, it is thus achieved that postpone the XON2 signal for Δ t, and XON2 signal controls
Gate Driver IC2 opens the even number line scan line electric discharge of all of TFT-LCD.
The present embodiment is divided into two groups all scan lines of TFT-LCD, opens respectively.Sequential time delay Δ t therein passes through
Delay circuit produces, and the electric current of surging that TFT-LCD electric discharge produces is divided into original 1/2, successively flows out TFT-LCD successively, thus
The impact of the electric current of surging that abatement shutdown produces.
The present invention is directed to shutdown moment of TFT-LCD panel line device that electric current brings of surging and damage phenomenon, proposing will
All scan lines are divided into n part, and the scan line of every part is successively opened in time, the electricity of surging that TFT-LCD electric discharge produces
Flow point is original 1/n, successively flows out TFT-LCD successively.Design described in this motion can drop to former shutdown electric current of surging
The 1/n come, thus the electricity improving shutdown moment generation destroys problem.
The above, the only detailed description of the invention of the present invention, but protection scope of the present invention is not limited thereto, and any
Those familiar with the art, in the technical scope that the invention discloses, can readily occur in change or replace, should contain
Cover within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with described scope of the claims.
Claims (10)
1. a display panels, including:
What plural number bar gate line and plural number data line, plural number bar gate line and plural number data line intersected to form is arranged in array
A plurality of pixel cells, described gate line is divided into first group of gate line of identical bar number to n-th group gate line, and n is for being more than
In the natural number of 2；
Control unit, described control unit is connected with gate drivers, when performing shutdown action, is used for controlling described scanning and drives
Dynamic device opens first group of gate line in order to n-th group gate line, and wherein, n-th group gate line opens sequential than (n-1)th group of grid
Sequential time delay Δ t opened by line, and wherein, Δ t=CV/Ion, C are the electric capacity of pixel cell described in one, and V is pixel cell described in
On-state voltage, Ion is the ON state current of pixel cell described in.
Display panels the most according to claim 1, it is characterised in that described gate line is divided into first group of odd-numbered line
Gate line and second group of gate line of even number line, when performing shutdown action, described control unit controls described scanner driver
The first scan drive cell and the second scan drive cell open described first group of gate line and second grid the most in order
Line, wherein, second group of gate line is opened sequential and is opened sequential time delay Δ t than first group of gate line.
Drive circuit the most according to claim 2, it is characterised in that described control circuit includes the first comparator and second
Comparator, one end input supply voltage Vcc of the first comparator, the other end inputs the first comparison voltage V1, and outfan connects institute
State the outfan of the first scan drive cell；
One end input supply voltage Vcc of the second comparator, the other end inputs the second comparison voltage V2, and outfan connects described the
The outfan of two scan drive cells；
Wherein, the first comparison voltage V1 is that gate line opens signal by voltage during high level step-down level, the second comparison voltage
V2 is the voltage that power source voltage Vcc declines the Δ t time.
Drive circuit the most according to claim 2, it is characterised in that described control circuit includes power circuit and deferred telegram
Road, described power circuit output two-way grid unlatching signal, a road grid unlatching signal inputs described first group of gate line, another
Grid described in road is opened signal and is inputted described delay circuit, and described delay circuit output delay time is that the grid of Δ t opens letter
Number to described second group of gate line.
Drive circuit the most according to claim 4, it is characterised in that described delay circuit includes four reversers, one
A resistive element R and capacity cell C, by arranging the value of R, C, determines Δ t time delay.
6. a liquid crystal indicator, including the display panels as described in one of claim 1-5.
7. a driving method for display panels, including: a display panels is provided, including
What plural number bar gate line and plural number data line, plural number bar gate line and plural number data line intersected to form is arranged in array
A plurality of pixel cells, described gate line is divided into first group of gate line of identical bar number to n-th group gate line, and n is for being more than
In the natural number of 2；
When performing shutdown action, control scanner driver by control unit and open first group of gate line in order to n-th group
Gate line, wherein, n-th group gate line is opened sequential and is opened sequential time delay Δ t, wherein, Δ t=CV/ than (n-1)th group of gate line
Ion, C are the electric capacity of pixel cell described in one, and V is the on-state voltage of pixel cell described in, and Ion is pixel cell described in
ON state current.
Driving method the most according to claim 7, it is characterised in that described gate line be divided into odd-numbered line first group of grid
Polar curve and second group of gate line of even number line, when performing shutdown action, described control unit controls described scanner driver
First scan drive cell and the second scan drive cell open described first group of gate line and second gate line the most in order,
Wherein, second group of gate line is opened sequential and is opened sequential time delay Δ t than first group of gate line.
Driving method the most according to claim 8, it is characterised in that described control circuit includes the first comparator and second
Comparator, one end input supply voltage Vcc of the first comparator, the other end inputs the first comparison voltage V1, and outfan connects institute
State the outfan of the first scan drive cell；
One end input supply voltage Vcc of the second comparator, the other end inputs the second comparison voltage V2, and outfan connects described the
The outfan of two scan drive cells；
Wherein, the first comparison voltage V1 is that gate line opens signal by voltage during high level step-down level, the second comparison voltage
V2 is the voltage that power source voltage Vcc declines the Δ t time；
When performing shutdown action, power source voltage Vcc starts to reduce, when Vcc is reduced to the first comparison voltage V1, and comparator work
Exporting, described control circuit controls described first scan drive cell and opens described first group of gate line, through postponing sequential
After Δ t, power source voltage Vcc is reduced to the second comparison voltage V2, and described control circuit controls described first scan drive cell and opens
Open described first group of gate line.
Driving method the most according to claim 8, it is characterised in that described control circuit is power circuit and deferred telegram
Road, when performing shutdown action, when the power source voltage Vcc of described power circuit output drops to certain numerical value, described power supply electricity
Road output two-way grid opens signal, and a road grid is opened signal and inputted described first group of gate line, and grid described in another road is opened
Opening signal and input described delay circuit, described delay circuit output delay time is that the grid of Δ t opens signal to described second
Group gate line.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610481428.1A CN106125425B (en) | 2016-06-27 | 2016-06-27 | Liquid crystal display panel, its driving method and display device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610481428.1A CN106125425B (en) | 2016-06-27 | 2016-06-27 | Liquid crystal display panel, its driving method and display device |
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| CN106125425B CN106125425B (en) | 2019-08-23 |
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| CN201610481428.1A Active CN106125425B (en) | 2016-06-27 | 2016-06-27 | Liquid crystal display panel, its driving method and display device |
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Cited By (1)
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| CN107784990A (en) * | 2017-10-31 | 2018-03-09 | 京东方科技集团股份有限公司 | Charging method, electric discharge regulation circuit and the display device of liquid crystal display panel |
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| CN106125425B (en) | 2019-08-23 |
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