CN106125425B - Liquid crystal display panel, its driving method and display device - Google Patents
Liquid crystal display panel, its driving method and display device Download PDFInfo
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- CN106125425B CN106125425B CN201610481428.1A CN201610481428A CN106125425B CN 106125425 B CN106125425 B CN 106125425B CN 201610481428 A CN201610481428 A CN 201610481428A CN 106125425 B CN106125425 B CN 106125425B
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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
-
- 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
Abstract
The invention discloses a kind of liquid crystal display panel, its driving method and display devices, liquid crystal display panel includes: plural grid line and plural data line, the a plurality of pixel units being arranged in array that plural grid line and plural data line intersect to form, the grid line is divided into first group of grid line of identical item number to n-th group grid line, and n is the natural number more than or equal to 2；Control unit, described control unit is connect with gate drivers, when executing shutdown movement, first group of grid line is opened in order to n-th group grid line for controlling the scanner driver, wherein, n-th group grid line opens than (n-1)th group grid line of timing and opens sequential time delay Δ t, wherein, Δ t=CV/Ion, C is the capacitor of a pixel unit, V is the on-state voltage of a pixel unit, and Ion is the on-state current of a pixel unit, and the invention also discloses its driving method and display devices.
Description
Technical field
The present invention relates to technical field of liquid crystal display, in particular to a kind of liquid crystal display panel, its driving method and display
Device.
Background technique
Thin Film Transistor-LCD (thin film transistor-liquid crystal display, TFT-
LCD for display driving framework) as shown in Figure 1: in booting, power circuit (Power-IC) receives the starting voltage of high level
After VCC, high level voltage VGH, clock signal XON to scan line drive circuit (the Gate Driver of output driving scan line
IC), Gate Driver IC output successively exports VGH signal to each scan line, opens the TFT switch of every one-row pixels,
Corresponding pixel is set to receive data (Data) signal voltage, to show picture.
TFT-LCD is voltage maintenance display device, and each pixel during picture is shown requires to keep a certain amount of
Charge.After TFT-LCD shutdown, remaining charge, which will lead to, in pixel there is afterimage on display screen.Here it is shutdown tides
The problem of nighttide.In order to avoid there is remaining influence when TFT-LCD shutdown, the TFT for opening all pixels during shutdown is needed to open
It closes, the charge abrupt release remained in pixel, guarantees picture entirety pixel voltage having the same and identical grayscale, disappear
Except the influence of charge residue.
To solve the above-mentioned problems, XON Function mode as shown in Figure 2 is often used now: when VCC voltage reduces
When to certain value, XON signal becomes low level by high level, and Gate Driver IC receives low level XON signal, opens institute
Some TFT discharge, and achieve the purpose that accelerated release in vitro charge.
When TFT-LCD shuts down, using XON Function mode as shown in Figure 2, i.e., waits to open during shutdown and own
TFT is discharged with accelerated charge, will inevitably generate the electric current Igh that surges.Igh is bigger, the VGH of TFT-LCD panel periphery
Cabling is easy destroyed.Electric current of surging has a problem in that scan line high level VGH is higher, and the electric current of scan line is flowed into through TFT
Igh is bigger；The size of TFT-LCD panel is bigger, and Igh is bigger；The resolution ratio of TFT-LCD panel is higher, and Igh is bigger.
Surge electric current generation will cause the burning of wiring, the problems such as device selection is limited.It surges at present in solution shutdown
In current problems, mostly from change Driver IC inside structure.Change Driver IC inside structure, the exploitation of circuit chip and
It is very high to verify cost.Also have plenty of and increase route on the glass substrate, modify array substrate cabling (Wire onArray, WOA)
Mode overcome.Change array substrate cabling, the exploitation of TFT-LCD and verifying cost are very high.
Summary of the invention
To overcome above-mentioned defect in the prior art, the technical problems to be solved by the invention are as follows: provide a kind of abatement liquid
Crystal panel shutdown is surged liquid crystal display panel, its driving method and the display device of electric current, to go out when solving liquid crystal display panel shutdown
Existing height surge electric current destroy problem.
In order to achieve the above objectives, the invention proposes a kind of liquid crystal display panels, comprising: plural grid line and plural item
The a plurality of pixel units being arranged in array that data line, plural grid line and plural data line intersect to form, the grid
Polar curve is divided into first group of grid line of identical item number to n-th group grid line, and n is the natural number more than or equal to 2；Control unit, institute
It states control unit to connect with scanner driver, when executing shutdown movement, be opened in order for controlling the scanner driver
First group of grid line is to n-th group grid line, wherein n-th group grid line opens than (n-1)th group grid line unlatching sequential time delay of timing
Δ t, wherein Δ t=CV/Ion, C are the capacitor of a pixel unit, and V is the on-state voltage of a pixel unit, Ion
For the on-state current of a pixel unit.
Further, the grid line is divided into first group of grid line of odd-numbered line and second group of grid line of even number line,
When executing shutdown movement, described control unit controls the first scan drive cell of the scanner driver and the second scanning is driven
Moving cell opens first group of grid line and second gate line in order respectively, wherein second group of grid line opens timing ratio
First group of grid line opens sequential time delay Δ t.
On the one hand, the control circuit of liquid crystal display panel includes first comparator and the second comparator, first comparator
One end input supply voltage Vcc, other end input first compare voltage V1, and output end connects first scan drive cell
Output end；One end input supply voltage Vcc of second comparator, other end input second compare voltage V2, and output end connects institute
State the output end of the second scan drive cell；Wherein, the first comparison voltage V1 is that grid line open signal is lower electricity by high level
Voltage usually, second compares the voltage that voltage V2 is the power source voltage Vcc decline Δ t time.
On the other hand, the control circuit of liquid crystal display panel includes power circuit and delay circuit, and the power circuit is defeated
Two-way grid open signal out, grid open signal inputs first group of grid line all the way, and grid described in another way opens letter
Number input delay circuit, the grid open signal that the delay circuit output delay time is Δ t to second group of grid
Polar curve.
Further, the delay circuit includes four reversers, a resistive element R and a capacity cell C, is passed through
The value of R, C are set, determine delay time Δ t.
The invention also provides a kind of liquid crystal display devices, including above-mentioned liquid crystal display panel.
The present invention has also been proposed a kind of driving method of liquid crystal display panel, comprising: a liquid crystal display panel is provided, including
What what plural grid line and plural data line, plural grid line and plural data line intersected to form be arranged in array answers
Several pixel units, the grid line are divided into first group of grid line of identical item number to n-th group grid line, and n is more than or equal to 2
Natural number；When executing shutdown movement, scanner driver is controlled by control unit and opens first group of grid line in order to n-th
Group grid line, wherein n-th group grid line opens than (n-1)th group grid line of timing and opens sequential time delay Δ t, wherein Δ t=CV/
Ion, C are the capacitor of a pixel unit, and V is the on-state voltage of a pixel unit, and Ion is a pixel unit
On-state current.
Further, the grid line is divided into first group of grid line of odd-numbered line and second group of grid line of even number line,
When executing shutdown movement, described control unit controls the first scan drive cell of the scanner driver and the second scanning is driven
Moving cell opens first group of grid line and second gate line in order respectively, wherein second group of grid line opens timing ratio
First group of grid line opens sequential time delay Δ t.
Further, the control circuit includes first comparator and the second comparator, one end input of first comparator
Power source voltage Vcc, other end input first compare voltage V1, and output end connects the output end of first scan drive cell；
One end input supply voltage Vcc of second comparator, other end input second compare voltage V2, and output end connection described second is swept
Retouch the output end of driving unit；Wherein, first comparison voltage V1 be grid line open signal be lower by high level level when electricity
Pressure, second compares the voltage that voltage V2 is the power source voltage Vcc decline Δ t time；When executing shutdown movement, power source voltage Vcc
Start to reduce, when Vcc is reduced to the first comparison voltage V1, comparator work output, the control circuit control described first
Scan drive cell opens first group of grid line, and after postponing timing Δ t, power source voltage Vcc is reduced to the second comparison
Voltage V2, the control circuit control first scan drive cell and open first group of grid line.
Further, the control circuit is power circuit and delay circuit, when executing shutdown movement, the power supply electricity
When the power source voltage Vcc of road output drops to certain numerical value, the power circuit exports two-way grid open signal, all the way grid
Open signal inputs first group of grid line, and grid open signal described in another way inputs the delay circuit, the delay
Circuit output delay time is the grid open signal of Δ t to second group of grid line.
Compared with prior art, the present invention the advantage is that: circuit structure provided by the invention 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
The high level open-circuit voltage of scan line is applied to odd number horizontal scanning line, even number horizontal scanning line respectively.Odd-line pixels or idol
What several rows of pixels were formed when opening simultaneously surge, and electric current is the half of the electric current of surging formed when all pixels open simultaneously, so
The electric current of surging that circuit structure provided by the invention and driving method are formed when liquid crystal display panel can be shut down is down to half, thus
The shutdown of structure liquid crystal display panel is surged various electricity breakoff phenomenons caused by high current.
Detailed description of the invention
Fig. 1 is the operation schematic diagram of TFT-LCD scan line drive circuit；
Fig. 2 is XON Function operation schematic diagram in 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.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
Fig. 3 is the circuit framework schematic diagram of one embodiment of the invention.As shown in figure 3, the present invention provides a kind of scan line
Drive circuit structure, all scan lines are divided into two groups of shutdown electric discharges, and discharge delay time is Δ t.In scanning line driving electricity
Lu Zhong, the channel of all connection odd number horizontal scanning lines, the output end in each channel be arranged one compare and with the ratio
To the switching circuit A of connection, compares voltage and be set as first comparator voltage Vcomparsion1；All connection even number line scanning
The channel of line, the output end in each channel are arranged the switching circuit B for comparing and comparing connection with this, compare voltage
It is set as Vcomparsion2.
Entire Comparison Circuit is made of comparator A and comparator B, and VCC is used as input voltage, Vcomparsion1 with
Vcomparsion2 exports the triggering as switching circuit as voltage is compared；Switching circuit and scan line drive circuit (Gate
Driver IC) output end (Output) be connected, the output of Comparison Circuit is as control signal.
In Fig. 3, the selection standard of voltage Vcomparsion1 and Vcomparsion2 are compared are as follows: Vcomparsion1 electricity
Voltage when pressure takes XON signal high level to become low level, Vcomparsion2 voltage take the voltage of VCC decline Δ t time.
The circuit drives timing of the present embodiment is as shown in Figure 4: when TFT-LCD shutdown, input voltage VCC starts to reduce,
When VCC is reduced to the comparison voltage Vcomparsion1 of setting, comparator A work output turns on the switch circuit, XON signal
Low level is become by high level, Gate Driver IC exports Vgh voltage, opens GOUT2n electric discharge.After Δ t, VCC is reduced
To Vcomparsion2, GOUT2n+1 electric discharge is opened in comparator B output.All scan lines of TFT-LCD are divided into two groups in this way,
It opens respectively.The electric current of surging that sequential time delay Δ t therein, TFT-LCD electric discharge generate will fall to original 1/2, thus
The influence for the electric current of surging that abatement shutdown generates.
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 a capacity cell C are formed, and by the way that the value of R, C is arranged, can determine delay time Δ t.Delay circuit
Input signal be XON1 signal that Power IC circuit generates, export the XON2 for being Δ t for delay time, XON2 signal with
Gate Driver IC2 connection.
The circuit drives timing of the present embodiment is as shown in Figure 6: when shutdown, VCC voltage decline, when dropping to certain numerical value
When, XON1 signal becomes low level by high level, and XON1 signal control Gate Driver IC1 opens all TFT-LCD's
The electric discharge of odd number horizontal scanning line.XON1 signal passes through delay circuit, obtains the XON2 signal that delay is Δ t, the control of XON2 signal
Gate Driver IC2 opens the even number horizontal scanning line electric discharge of all TFT-LCD.
All scan lines of TFT-LCD are divided into two groups by the present embodiment, are opened respectively.Sequential time delay Δ t therein passes through
Delay circuit generates, and the electric current of surging that TFT-LCD electric discharge generates is divided into original 1/2, successively successively flows out TFT-LCD, thus
The influence for the electric current of surging that abatement shutdown generates.
The present invention for TFT-LCD panel shutdown moment surge electric current bring line device damage phenomenon, propose will
All scan lines are divided into the part n, and the scan line of each section is successively opened in time, the electricity of surging that TFT-LCD electric discharge generates
Flow point is original 1/n, successively successively flows out TFT-LCD.The electric current that shutdown can be surged is designed described in this motion drops to original
The 1/n come destroys problem so as to improve the electricity that shutdown moment generates.
The above description is merely a specific embodiment, but scope of protection of the present invention is not limited thereto, any
Those familiar with the art in the technical scope disclosed by the present invention, can easily think of the change or the replacement, and should all contain
Lid is within protection scope of the present invention.Therefore, protection scope of the present invention should be based on the protection scope of the described claims.
Claims (10)
1. a kind of liquid crystal display panel, comprising:
What plural grid line and plural data line, plural grid line and plural data line intersected to form is arranged in array
A plurality of pixel units, the grid line is divided into first group of grid line of identical item number to n-th group grid line, n be greater than etc.
In 2 natural number；
Control unit, described control unit are connect with scanner driver, when executing shutdown movement, are driven for controlling the scanning
Dynamic device opens first group of grid line to n-th group grid line in order, wherein n-th group grid line opens than (n-1)th group grid of timing
Line opens sequential time delay Δ t, wherein Δ t=CV/Ion, C are the capacitor of a pixel unit, and V is a pixel unit
On-state voltage, Ion be a pixel unit on-state current.
2. liquid crystal display panel according to claim 1, which is characterized in that the grid line is divided into first group of odd-numbered line
Second group of grid line of grid line and even number line, when executing shutdown movement, described control unit controls the scanner driver
The first scan drive cell and the second scan drive cell open first group of grid line and second group of grid in order respectively
Polar curve, wherein second group of grid line opens than first group grid line of timing and open sequential time delay Δ t.
3. liquid crystal display panel according to claim 2, which is characterized in that the control circuit of liquid crystal display panel includes the
One comparator and the second comparator, one end input supply voltage Vcc of first comparator, other end input first compare voltage
V1, output end connect the output end of first scan drive cell；
One end input supply voltage Vcc of second comparator, other end input second compare voltage V2, output end connection described the
The output end of two scan drive cells；
Wherein, first comparison voltage V1 be grid line open signal be lower by high level level when voltage, second compare voltage
V2 is the voltage that power source voltage Vcc declines the Δ t time.
4. liquid crystal display panel according to claim 2, which is characterized in that the control circuit of liquid crystal display panel includes electricity
Source circuit and delay circuit, the power circuit export two-way grid open signal, all the way grid open signal input described the
One group of grid line, grid open signal described in another way input the delay circuit, and the delay circuit output delay time is
The grid open signal of Δ t is to second group of grid line.
5. liquid crystal display panel according to claim 4, which is characterized in that the delay circuit includes four reversers,
An one resistive element R and capacity cell C determines delay time Δ t by the way that the value of R, C is arranged.
6. a kind of liquid crystal display device, including the liquid crystal display panel as described in one of claim 1-5.
7. a kind of driving method of liquid crystal display panel, comprising: a liquid crystal display panel is provided, including
What plural grid line and plural data line, plural grid line and plural data line intersected to form is arranged in array
A plurality of pixel units, the grid line is divided into first group of grid line of identical item number to n-th group grid line, n be greater than etc.
In 2 natural number；
When executing shutdown movement, scanner driver is controlled by control unit and opens first group of grid line in order to n-th group
Grid line, wherein n-th group grid line opens than (n-1)th group grid line of timing and opens sequential time delay Δ t, wherein Δ t=CV/
Ion, C are the capacitor of a pixel unit, and V is the on-state voltage of a pixel unit, and Ion is a pixel unit
On-state current.
8. driving method according to claim 7, which is characterized in that the grid line is divided into first group of grid of odd-numbered line
Second group of grid line of polar curve and even number line, when executing shutdown movement, described control unit controls the scanner driver
First scan drive cell and the second scan drive cell open first group of grid line and second group of grid in order respectively
Line, wherein second group of grid line opens than first group grid line of timing and open sequential time delay Δ t.
9. driving method according to claim 8, which is characterized in that the control circuit includes first comparator and second
Comparator, one end input supply voltage Vcc of first comparator, other end input first compare voltage V1, and output end connects institute
State the output end of the first scan drive cell；
One end input supply voltage Vcc of second comparator, other end input second compare voltage V2, output end connection described the
The output end of two scan drive cells；
Wherein, first comparison voltage V1 be grid line open signal be lower by high level level when voltage, second compare voltage
V2 is the voltage that power source voltage Vcc declines the Δ t time；
When executing shutdown movement, power source voltage Vcc starts to reduce, when Vcc is reduced to the first comparison voltage V1, comparator work
It exports, the control circuit controls first scan drive cell and opens first group of grid line, by postponing timing
After Δ t, power source voltage Vcc is reduced to the second comparison voltage V2, and the control circuit controls second scan drive cell and opens
Open second group of grid line.
10. driving method according to claim 8, which is characterized in that the control circuit is power circuit and deferred telegram
Road, when executing shutdown movement, when the power source voltage Vcc of the power circuit output drops to certain numerical value, the power supply electricity
Road exports two-way grid open signal, and grid open signal inputs first group of grid line all the way, and grid described in another way is opened
It opens signal and inputs the delay circuit, the grid open signal that the delay circuit output delay time is Δ t to described second
Group grid line.
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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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| CN201610481428.1A CN106125425B (en) | 2016-06-27 | 2016-06-27 | Liquid crystal display panel, its driving method and display device |
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| CN107784990B (en) * | 2017-10-31 | 2019-10-01 | 京东方科技集团股份有限公司 | The charging method of liquid crystal display panel, electric discharge adjust circuit and display device |
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| 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 |
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| KR20090005500A (en) * | 2007-07-09 | 2009-01-14 | 엘지디스플레이 주식회사 | Driving apparatus for liquid crystal display device and method for driving the same |
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