CN107068073A - Liquid crystal display panel and its driving method - Google Patents
Liquid crystal display panel and its driving method Download PDFInfo
- Publication number
- CN107068073A CN107068073A CN201611217396.0A CN201611217396A CN107068073A CN 107068073 A CN107068073 A CN 107068073A CN 201611217396 A CN201611217396 A CN 201611217396A CN 107068073 A CN107068073 A CN 107068073A
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- circuit
- liquid crystal
- crystal display
- display panel
- detection signal
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- 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.)
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Classifications
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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
- G09G3/3611—Control of matrices with row and column drivers
- G09G3/3685—Details of drivers for data electrodes
-
- 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
- G09G3/3611—Control of matrices with row and column drivers
Abstract
The present invention provides a kind of liquid crystal display panel and its driving method, and it includes source driving chip, and the source driving chip includes：Multiple passages, the second circuit and tertiary circuit being connected with the plurality of channel attached first circuit and with first circuit in parallel, the second circuit are provided with the first TFT switch, and the second circuit is provided with the second TFT switch.The present invention increases control control control signal XON circuit in source driving chip, is coordinated by detection signal TP and control signal XON, is acted according to TFT switch sequential, output VCOM voltages and data line signal；The present invention requires that its GIP circuit possesses XON circuit functions for GIP liquid crystal display panels, and level translator receives control signal XON and does solution tide；The independent circuit for detecting of present invention setting a, wherein fixed value will be set as by comparing voltage.
Description
Technical field
The invention belongs to technical field of liquid crystal display, more particularly to a kind of liquid crystal display panel and its driving method.
Background technology
IGZO (Indium Gallium Zinc Oxide) is the abbreviation of indium gallium zinc, and it is a kind of membrane transistor
Technology, sputters layer of metal oxide on TFT-LCD gate insulator.IGZO compared with uncrystalline silicon (a-Si) material,
20 to 50 times fast compared with a-Si TFT of electron mobility, IGZO uses indium, gallium, zinc, oxygen, instead of traditional a-Si existing with figure
Layer, can substantially reduce the response time of LCD screen, reduce electric crystal size, improve the aperture opening ratio of liquid crystal panel picture element, compared with
High precision easily is realized, thus simple external circuit is integrated among panel, makes mobile device more frivolous, power consumption also drops
To 2/3rds before.Compared using a-SI, LTPS (low-temperature polysilicon silicon technology), IGZO TFT I-V characteristics such as Fig. 1 institutes
Show.
IGZO TFT are compared with a-Si TFT, and conducting electric current is high about 20 times：Due to TFT can be decreased to about 1/4, therefore can
By improving, the reduction power consumption of panel aperture opening ratio simultaneously realizes pixel High precision.
IGZO TFT are respectively compared with a-Si TFT and LTPS TFT, and cut-off leakage current is only less than 1pA：Even if reducing
TFT driving number of times, can also maintain the orientation of liquid crystal molecule, therefore the power consumption of panel monomer can be reduced into 1/5 to 1/10.
The V-I characteristics of the IGZO-TFT shown in Fig. 1 are observed, it is found that not only conduction property is excellent, while cut-off characteristics is also special
It is excellent.Cut-off characteristics in available liquid crystal panel using the TFT of non-crystalline silicon formation is bad, therefore the electric charge energy after power-off in pixel
Discharged quickly through TFT, therefore the problem of special pixel charge is remained will not be formed.But it is due to IGZO TFT cut-off spy
Property spy it is excellent, so may result in when using IGZO technologies panel power-off after pixel charge quickly will not be discharged via TFT, its
As a result it is exactly that electric charge remains in panel itself for a long time, causes shutdown the phenomenon of ghost and start next time splashette occur.If
Panel picture element electric charge can not discharge, and ghost problem just occurs in panel, and phenomenon is as shown in Figure 2.
The content of the invention
It is an object of the invention to provide liquid crystal display panel and its driving for accelerating electric charge rate of release during a kind of shutdown
Method.
The present invention provides a kind of liquid crystal display panel, and it includes source driving chip, and the source driving chip includes：It is many
Individual passage, the second circuit being connected with the plurality of channel attached first circuit and with first circuit in parallel and the 3rd electricity
Road, the second circuit is provided with the first TFT switch, and the second circuit is provided with the second TFT switch.
Preferably, in addition to output control signal XON is to the circuit for detecting of the source driving chip, the control signal
XON is inputted to first TFT switch.
Preferably, in addition to output voltage VCOM and detection signal TP to the source driving chip SECO core
Piece, the detection signal TP is inputted to second TFT switch, and the output voltage VCOM is inputted to the second circuit.
Preferably, the reception control signal XON and detection signal TP level translator is included.
Preferably, in addition to left GIP circuits positioned at the liquid crystal display panel left side and on the right of the liquid crystal display panel
Right GIP circuits.
Preferably, in addition to metal oxide semiconductor layer, it is metal oxide that indium gallium zinc is constituted.
The present invention also provides the driving method of liquid crystal display panel, comprises the following steps：
The first step：When liquid crystal display panel is started shooting, time schedule controller chip operation, circuit for detecting output high level control letter
Number XON is opened to the first TFT switch, the first TFT switch；
Second step：Control signal XON is high level, and detection signal TP is low level, and the second TFT switch is closed；Sequential control
Device chip processed exports VCOM voltages to source driving chip, multiple passages output VCOM voltages of source driving chip；
3rd step：When the detection signal TP of first and second detection signal TP detecting become high level, source drive
Chip output data line signal, picture is normally shown；
4th step：When detection signal TP and the 4th detection signal TP detectings of the 3rd become high level, source drive
Chip output data line signal, picture is normally shown；
5th step：The like：When (n-1) individual detection signal TP and n-th of detection signal TP becomes high level, source
Pole driving chip output data line signal, picture is normally shown；
6th step：When liquid crystal display panel shuts down, input voltage reduction, time schedule controller chip is stopped, detecting electricity
Road output control signal XON becomes low level by high level；Level translator receives low level control signal XON, by grid
The TFT switch of pole connection is fully open, discharges the electric charge of pixel.
The present invention increases control control control signal XON circuit in source driving chip, passes through detection signal TP and control
Signal XON processed coordinates, and is acted according to TFT switch sequential, output VCOM voltages and data line signal；The present invention is directed to GIP liquid crystal
Display panel requires that its GIP circuit possesses XON circuit functions, and level translator receives control signal XON and does solution tide；The present invention
Independent circuit for detecting is set, wherein a fixed value will be set as by comparing voltage.
Brief description of the drawings
Fig. 1 is existing a-SI, LTPS, IGZO TFT I-V characteristic comparison charts；
Fig. 2 is the schematic diagram of existing shutdown image retention；
Fig. 3 is the structural representation of liquid crystal display panel of the present invention；
Fig. 4 is the circuit diagram of the source driving chip of liquid crystal display panel shown in Fig. 3；
Fig. 5 is the working timing figure of liquid crystal display panel shown in Fig. 3.
Embodiment
Below in conjunction with the accompanying drawings and specific embodiment, the present invention is furture elucidated, it should be understood that these embodiments are merely to illustrate
The present invention rather than limitation the scope of the present invention, after the present invention has been read, those skilled in the art are each to the present invention's
The modification for planting the equivalent form of value falls within the application appended claims limited range.
This liquid crystal display panel uses GIP technologies, and GIP (Gate In Panel, face inner grid) technologies are by liquid crystal panel
Gate driving circuit Source Driver are integrated on array base palte, generation high pressure GIP signals (High Voltage GIP
Signal, HV GIP Signal), and high pressure GIP signals are sent to GIP circuit GIP Circuit, then have the life of GIP circuits
Into gate drive signal, so as to liquid crystal display panel turntable driving, therefore compared to the driving skill of traditional liquid crystal display panel
Art, not only saves and eliminates welding (bonding) region of gate driving circuit and be fanned out to (fan-out) wiring space, and
Realize the design of narrow frame.
As shown in figure 3, being included using the liquid crystal display panel of GIP technologies：Circuit for detecting (Voltage Detector) 10,
Level translator (Level shift) 20, source driving chip (Source driver IC) 30, time schedule controller chip (T-
CON) 40, left GIP circuits 50 and right GIP circuits 60.Time schedule controller chip (T-CON) 40 exports VCOM voltages and detecting
Signal TP is to source driving chip (Source driver IC) 30；Circuit for detecting (Voltage Detector) 10 output controls
Signal XON is to source driving chip (Source driver IC) 30；In the moment of start, as circuit for detecting (Voltage
Detector) during 10 output control signal XON, time schedule controller chip (T-CON) 40 is exported without detection signal TP, i.e. detecting letter
Number TP is low level.
Wherein, the detecting voltage that circuit for detecting (Voltage Detector) 10 is set must be fixed as a value；Source electrode
Driving chip (Source driver IC) 30 has the function of XON circuits；Level translator (Level shift) 20 can be received
Control signal XON and control signal IP, coordinates left GIP circuits 50 and right GIP circuits 60 to solve tide function when completing shutdown.
During start, source driving chip (Source driver IC) 30 time schedule controller chip (T-CON) 40 when
The lower output voltage VCOM of sequence action, the phenomenon such as splashette when slowing down liquid crystal display panel start.When signal XON by high level becomes low
During level, level translator (Level shift) 20 all exports high level VGH.
As shown in figure 4, source driving chip (Source driver IC) 30 includes：Multiple passages 31, with it is the plurality of logical
The first circuit 32 that road 31 is connected, the first TFT switch 321 being arranged on first circuit 32, connect side by side with the first circuit 32
The second circuit 33 and tertiary circuit 34 that connect, the second TFT switch 331 being arranged on the second circuit 32, wherein, second circuit
32 and tertiary circuit 33 be connected to outside source driving chip (Source driver IC) 30；Pass through the first TFT switch 321
With the relevant connection of the second TFT switch 331.
Ground voltage GND is inputted to second circuit 33, and input voltage VCOM is inputted to tertiary circuit 34, control signal XON
Input is to the first TFT switch 321, and detection signal TP is inputted to the second TFT switch 331, and detection signal TP is time schedule controller core
The signal voltage that piece (T-CON) 40 is provided.
When liquid crystal display panel is started shooting, i.e.,：5V voltages, circuit for detecting are inputted to liquid crystal display panel
(VoltageDetector) 10 detect detection signal TP without output, control signal control signal XON be high level when, first
TFT switch 321 is opened, and the second TFT switch 331 is closed, and the output voltage VCOM of time schedule controller chip (T-CON) 40 is through the first electricity
Road 32 is to multiple passages 31, all multiple output voltages of passage 31 of source driving chip (Source driver IC) 30
VCOM；When the 1ststWith the 2nd 2ndDetection signal TP, the 3rd 1stWith the 4th 2ndDetection signal TP, the 3rd 1stWith the 4th 2ndDetecting
Signal TP ... detect when becoming high level, source driving chip (Source driver IC) 30 output voltage VCOM give
Data wire；When liquid crystal display panel shuts down, detection signal TP is to become low level by high level without output, control signal XON, electricity
All output high level VGH opens the first TFT switch 321 and the second TFT switch 331 to flat turn parallel operation (Level shift) 20, with
Discharge electric charge.
It is illustrated in figure 5 the timing diagram of liquid crystal display panel work of the present invention, the driving side of liquid crystal display panel of the present invention
Method, comprises the following steps：
The first step：When liquid crystal display panel is started shooting, i.e.,：5V voltages, time schedule controller chip are inputted to liquid crystal display panel
(T-CON) 40 work, circuit for detecting (Voltage Detector) 10 exports high-level control signal XON to the first TFT switch
321, the first TFT switch 321 is opened；
Second step：Control signal XON is high level, and detection signal TP is low level, and the second TFT switch 331 is closed；Sequential
Controller chip (T-CON) 40 exports VCOM voltages to source driving chip (Sourcedriver IC) 30, source driving chip
(Source driver IC) 30 multiple passages output VCOM voltages；
3rd step：First 1stDetection signal TP and second 2ndWhen detection signal TP detectings become high level, source electrode
Driving chip (Source driver IC) 30 output data line signals, picture is normally shown；
4th step：3rd 3stDetection signal TP and the 4th 3ndWhen detection signal TP detectings become high level, source electrode
Driving chip (Source driver IC) 30 output data line signals, picture is normally shown；
5th step：The like：(n-1)th (N-1)stDetection signal TP and n-th of NndDetection signal TP detectings become
During high level, source driving chip (Source driver IC) 30 output data line signals, picture is normally shown；
6th step：When liquid crystal display panel shuts down, input voltage reduction, time schedule controller chip (T-CON) 40 stops work
Make, the output control signal XON of circuit for detecting 10 becomes low level by high level；Level translator (Level shift) 20 is received
To low level control signal XON, the TFT switch that grid is connected is fully open, discharges the electric charge of pixel.
Metal oxide semiconductor layer is provided with liquid crystal display panel of the present invention, it is the metal oxidation that indium gallium zinc is constituted
Thing.
The present invention increases control control control signal XON circuit in source driving chip, passes through detection signal TP and control
Signal XON processed coordinates, and is acted according to TFT switch sequential, output VCOM voltages and data line signal；The present invention is directed to GIP liquid crystal
Display panel requires that its GIP circuit possesses XON circuit functions, and level translator receives control signal XON and does solution tide；The present invention
Independent circuit for detecting is set, wherein a fixed value will be set as by comparing voltage.
Claims (7)
1. a kind of liquid crystal display panel, it includes source driving chip, it is characterised in that the source driving chip includes：It is many
Individual passage, the second circuit being connected with the plurality of channel attached first circuit and with first circuit in parallel and the 3rd electricity
Road, the second circuit is provided with the first TFT switch, and the second circuit is provided with the second TFT switch.
2. liquid crystal display panel according to claim 1, it is characterised in that：Also include output control signal XON to described
The circuit for detecting of source driving chip, the control signal XON is inputted to first TFT switch.
3. liquid crystal display panel according to claim 2, it is characterised in that：Also include output voltage VCOM and detection signal
TP is to the timing controller of the source driving chip, and the detection signal TP is inputted to second TFT switch, described defeated
Go out voltage VCOM to input to the second circuit.
4. liquid crystal display panel according to claim 3, it is characterised in that：Also include receiving the control signal XON and
Detection signal TP level translator.
5. liquid crystal display panel according to claim 1, it is characterised in that：Also include positioned at the liquid crystal display panel left side
Left GIP circuits and the right GIP circuits on the right of liquid crystal display panel.
6. liquid crystal display panel according to claim 1, it is characterised in that：Also include metal oxide semiconductor layer, its
The metal oxide constituted for indium gallium zinc.
7. according to the driving method of any liquid crystal display panels of claim 1-6, it is characterised in that comprise the following steps：
The first step：When liquid crystal display panel is started shooting, time schedule controller chip operation, circuit for detecting output high-level control signal
XON is to the first TFT switch, and the first TFT switch is opened；
Second step：Control signal XON is high level, and detection signal TP is low level, and the second TFT switch is closed；Time schedule controller
Chip exports VCOM voltages to source driving chip, multiple passages output VCOM voltages of source driving chip；
3rd step：When the detection signal TP of first and second detection signal TP detecting become high level, source driving chip
Output data line signal, picture is normally shown；
4th step：When detection signal TP and the 4th detection signal TP detectings of the 3rd become high level, source driving chip
Output data line signal, picture is normally shown；
5th step：The like：When (n-1) individual detection signal TP and n-th of detection signal TP becomes high level, source electrode drives
Dynamic chip output data line signal, picture is normally shown；
6th step：When liquid crystal display panel shuts down, input voltage reduction, time schedule controller chip is stopped, and circuit for detecting is defeated
Go out control signal XON and low level is become by high level；Level translator receives low level control signal XON, and grid is connected
The TFT switch connect is fully open, discharges the electric charge of pixel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611217396.0A CN107068073B (en) | 2016-12-26 | 2016-12-26 | Liquid crystal display panel and its driving method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611217396.0A CN107068073B (en) | 2016-12-26 | 2016-12-26 | Liquid crystal display panel and its driving method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107068073A true CN107068073A (en) | 2017-08-18 |
| CN107068073B CN107068073B (en) | 2019-05-17 |
Family
ID=59624308
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611217396.0A Active CN107068073B (en) | 2016-12-26 | 2016-12-26 | Liquid crystal display panel and its driving method |
Country Status (1)
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107871484A (en) * | 2017-12-08 | 2018-04-03 | 南京中电熊猫平板显示科技有限公司 | Liquid crystal display device and the method for improving display panel power down splashette |
| CN110120202A (en) * | 2018-02-06 | 2019-08-13 | 夏普株式会社 | Display device |
| CN111369952A (en) * | 2020-03-26 | 2020-07-03 | 福建华佳彩有限公司 | GIP circuit and display panel |
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| CN101211036A (en) * | 2006-12-29 | 2008-07-02 | 群康科技(深圳)有限公司 | LCD device and its display method |
| CN101727853A (en) * | 2008-10-31 | 2010-06-09 | 瀚宇彩晶股份有限公司 | Liquid crystal display and control method thereof |
| CN103400555A (en) * | 2013-07-23 | 2013-11-20 | 合肥京东方光电科技有限公司 | Circuit for eliminating shutdown residual shadows and display |
| CN105632435A (en) * | 2016-01-05 | 2016-06-01 | 京东方科技集团股份有限公司 | Residual image circuit for switching on/off and method for removing residual image of switching on/off |
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2016
- 2016-12-26 CN CN201611217396.0A patent/CN107068073B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101211036A (en) * | 2006-12-29 | 2008-07-02 | 群康科技(深圳)有限公司 | LCD device and its display method |
| CN101727853A (en) * | 2008-10-31 | 2010-06-09 | 瀚宇彩晶股份有限公司 | Liquid crystal display and control method thereof |
| CN103400555A (en) * | 2013-07-23 | 2013-11-20 | 合肥京东方光电科技有限公司 | Circuit for eliminating shutdown residual shadows and display |
| CN105632435A (en) * | 2016-01-05 | 2016-06-01 | 京东方科技集团股份有限公司 | Residual image circuit for switching on/off and method for removing residual image of switching on/off |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107871484A (en) * | 2017-12-08 | 2018-04-03 | 南京中电熊猫平板显示科技有限公司 | Liquid crystal display device and the method for improving display panel power down splashette |
| CN110120202A (en) * | 2018-02-06 | 2019-08-13 | 夏普株式会社 | Display device |
| CN111369952A (en) * | 2020-03-26 | 2020-07-03 | 福建华佳彩有限公司 | GIP circuit and display panel |
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| Publication number | Publication date |
|---|---|
| CN107068073B (en) | 2019-05-17 |
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