CN203366703U - Array substrate and display apparatus - Google Patents
Array substrate and display apparatus Download PDFInfo
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- CN203366703U CN203366703U CN2013204455308U CN201320445530U CN203366703U CN 203366703 U CN203366703 U CN 203366703U CN 2013204455308 U CN2013204455308 U CN 2013204455308U CN 201320445530 U CN201320445530 U CN 201320445530U CN 203366703 U CN203366703 U CN 203366703U
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Abstract
The embodiment of the utility model provides an array substrate and a display apparatus and relates to the display technical field. The array substrate comprises a scanning driving unit for providing line scanning signals to a plurality of grid lines, and a data driving unit for providing data signals to a plurality of data lines wherein the grid lines and the data lines are intersect laterally and longitudinally to form a pixel unit array in matrix arrangement. The array substrate further comprises a control unit which is electrically connected with the scanning driving unit and the data driving unit respectively. When a display is powered off, the scan driving unit starts up each pixel unit, and the charges stored in the pixel units are released rapidly through the data lines, so as to eliminate shutdown afterimage of an AMOLED display.
Description
Technical field
The utility model relates to the display technique field, relates in particular to a kind of array base palte and display device.
Background technology
OLED(Organic Light Emitting Diode, Organic Light Emitting Diode) principle of luminosity of display is to apply certain electric field by the anode to the electroluminescence layer both sides and negative electrode, under the driving of electric field, electronics and hole move to luminescent layer from negative electrode and anode by electron transfer layer and hole transmission layer respectively, and meet in luminescent layer, thereby form exciton and light emitting molecule is excited, the latter sends visible ray through radiative relaxation.With traditional LCD(Liquid Crystal Display, liquid crystal display) compare, the OLED display is because of its autoluminescence had, fast response, wide visual angle and can be produced on the first-class characteristics of flexible substrate and be applied to more and more in the middle of high-performance demonstration field.
OLED can be divided into PMOLED (Passive Matrix Driving OLED, passive matrix drive Organic Light Emitting Diode) and AMOLED(Active Matrix Driving OLED, active matrix-driven organic light-emitting diode by type of drive) two kinds.Traditional PMOLED, along with the increase of sized display, needs to reduce the driving time of single pixel usually, thereby needs to increase transient current, thereby causes the significantly rising of power consumption.And, in the AMOLED technology, each OLED all, by TFT (Thin Film Transistor, thin film transistor (TFT)) the on-off circuit input current of lining by line scan, can address these problems well.
But, because AMOLED is active type of drive, in the moment of shutdown, residual on pixel capacitance have an electric charge, these electric charges can make pixel shutdown remain in a flash the voltage before shutdown, thereby make panel have picture residual, form so-called power-off ghost shadow.
The utility model content
Embodiment of the present utility model provides a kind of array base palte and driving method thereof, display device, in order to eliminate the power-off ghost shadow of AMOLED display.
For achieving the above object, embodiment of the present utility model adopts following technical scheme:
The one side of the utility model embodiment, a kind of array base palte is provided, comprise: for the scan drive cell of line scan signals is provided to many grid lines, and for the data-driven unit of data-signal is provided to many data lines, described many grid lines and many data line transverse and longitudinals intersect to form the pixel unit array that matrix form is arranged, and also comprise:
Control module, described control module is electrically connected to described scan drive cell and described data-driven unit respectively, for when display device is cut off the power supply, control described scan drive cell and open each described pixel cell, the electric charge of described pixel cell storage inside discharges fast by described data line.
The utility model embodiment on the other hand, provides a kind of display device, and described display device comprises array base palte as mentioned above.
The array base palte that the utility model embodiment provides and display device, by on the basis in existing array base palte design, increasing control module, this control module is electrically connected to scan drive cell and data-driven unit respectively, for when display device is cut off the power supply, the gated sweep driver element is opened each pixel cell, thereby makes the electric charge of pixel cell storage inside to be discharged fast by data line.So, avoided in display device postboost moment, the power-off ghost shadow of AMOLED display, because the picture that exists electric charge to produce is residual, has effectively been eliminated in pixel inside, has improved the display quality of display device.
The accompanying drawing explanation
In order to be illustrated more clearly in the utility model embodiment or technical scheme of the prior art, below will the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described, apparently, accompanying drawing in the following describes is only embodiment more of the present utility model, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain according to these accompanying drawings other accompanying drawing.
The structural representation of a kind of array base palte that Fig. 1 provides for the utility model embodiment;
The circuit connection structure schematic diagram of a kind of array base palte that Fig. 2 provides for the utility model embodiment;
The signal waveforms of a kind of array base palte when display device is cut off the power supply that Fig. 3 provides for the utility model embodiment;
The schematic flow sheet of the driving method of a kind of array base palte that Fig. 4 provides for the utility model embodiment.
Embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, the technical scheme in the utility model embodiment is clearly and completely described, obviously, described embodiment is only the utility model part embodiment, rather than whole embodiment.Embodiment based in the utility model, those of ordinary skills are not making under the creative work prerequisite the every other embodiment obtained, and all belong to the scope of the utility model protection.
The utility model embodiment provides a kind of array base palte, as shown in Figure 1, comprise: for the scan drive cell 110 of line scan signals is provided to many grid lines 111, and for the data-driven unit 120 of data-signal is provided to many data lines 121, many grid lines 111 and many data line 121 transverse and longitudinals intersect to form pixel cell 130 arrays that matrix form is arranged, and also comprise:
The array base palte that the utility model embodiment provides, by on the basis in existing array base palte design, increasing control module, this control module is electrically connected to scan drive cell and data-driven unit respectively, for when display device is cut off the power supply, the gated sweep driver element is opened each pixel cell, thereby makes the electric charge of pixel cell storage inside to be discharged fast by data line.So, avoided in display device postboost moment, the power-off ghost shadow of AMOLED display, because the picture that exists electric charge to produce is residual, has effectively been eliminated in pixel inside, has improved the display quality of display device.
Further, as shown in Figure 2, array base palte can also comprise for the power lead VDD to pixel cell 130 in-line powers.
Concrete, in the utility model embodiment, display device can adopt various OLED displays, because the OLED device is active device, therefore usually need to additionally arrange one for the power lead VDD to the energy supply of OLED device is arranged, when display device is cut off the power supply, this power lead VDD is difficult to accomplish to close in time usually, there is electric charge in the same like this inside of pixel cell that can cause, thereby produces power-off ghost shadow.Adopt a kind of like this design of control module 140 can be rapidly by power lead VDD ground connection when display device is cut off the power supply, thereby further avoided the inside residual charge of pixel cell, further improved the display quality of display device.
Further, as shown in Figure 2, pixel cell 130 specifically can comprise: the first transistor 131, transistor seconds 132, memory capacitance 133 and luminescent device 134.
The grid of this first transistor 131 connects grid line 111, and its first utmost point connects the grid of transistor seconds 132, its second utmost point connection data line 121.
First utmost point of this transistor seconds 132 connects the positive pole of luminescent device 134, its second utmost point connecting power line VDD.
One end of memory capacitance 133 connects the grid of transistor seconds 132, and its other end connects the negative pole of luminescent device 134.
The negative pole of luminescent device 134 also connects public electrode 135.
It should be noted that, the transistor adopted in all embodiment of the utility model can be all thin film transistor (TFT) or field effect transistor or the identical device of other characteristics, because the transistorized source electrode adopted here, drain electrode are symmetrical, so its source electrode, drain electrode are as broad as long.In the utility model embodiment, for distinguishing transistor the two poles of the earth except grid, wherein a utmost point is called source electrode, and another utmost point is called drain electrode.In addition, distinguish and transistor can be divided into to N-type transistor or P transistor npn npn according to transistorized characteristic, in the utility model embodiment, when adopting the N-type transistor, it first can be extremely source electrode, and second can be extremely drain electrode, when adopting the P transistor npn npn, its first can be extremely the drain electrode, second can be extremely source electrode.In the AMOLED image element circuit provided at the utility model embodiment; all crystals Guan Jun be take the explanation that the N-type transistor carries out as example; what can expect is that those skilled in the art can expect easily not making under the creative work prerequisite when adopting the P transistor npn npn to realize, therefore also in embodiment protection domain of the present utility model.
Further, as shown in Figure 2, scan drive cell 110 can comprise: the first scan signal line GO, the second scan signal line GE, pressure-wire Vgh, two three transistors 112 and a plurality of four transistor 113 corresponding with the first scan signal line GO and the second scan signal line GE respectively.
The grid connection control unit 140 of the 3rd transistor 112, its first utmost point connects scan signal line, and its second utmost point connects pressure-wire Vgh.
The grid connection control unit 140 of the 4th transistor 113, its first utmost point connects a grid line 111, and its second utmost point connects a scan signal line.
Wherein, the first scan signal line GO is for providing line scan signals to the grid line 111 of odd-numbered line line by line by the 4th transistor 113.
The second scan signal line GE is for providing line scan signals to the grid line 111 of even number line line by line by the 4th transistor 113.
Adopt a kind of like this scan drive cell circuit design of structure, input horizontal-drive signal by interlacing, can avoid adjacent two row inputs same signals and produce and in the ranks crosstalk, thereby can, so that the line space between adjacent two row pixel cells further dwindles, greatly improve resolution and the display quality of display device.
Further, with reference to shown in Fig. 2, data-driven unit 120 can comprise equally: many data signal lines, a switch signal line S and a plurality of five transistors 122 corresponding with data signal line.
The grid connecting valve signal wire S of the 5th transistor 122, its first utmost point connects a data line 121, and its second utmost point connects a data signal line.
Each data signal line is for inputting a kind of data-signal of color.
Concrete, in the utility model embodiment, be to take the explanation that data signal line comprises that red data signal wire DR, green data signal wire DG and tri-data signal lines of data blue signal line DB carry out as example.Wherein, each data signal line is a corresponding row pixel cell all, and every three row pixel cells are red green and blue three looks respectively, thereby realizes colored the demonstration.
Further, control module 140 can also comprise: for control signal wire Xon, the 6th transistor 142 and the 7th transistor 143 that receives timer 141 output signals.
The grid connection control signal line Xon of the 6th transistor 142, its first utmost point connecting power line VDD, its second utmost point ground connection GND.
The grid connection control signal line Xon of the 7th transistor 143, its first utmost point connection data signal wire, its second utmost point ground connection.
Concrete, timer 141 can adopt and comprise Tcon(Timer Control Register, counter control register) at interior all electronic devices and components or circuit structures with timing trigger function, realize.Whole transistors of take all adopt the N-type transistor as example, when display device is shut down, can be by a high level pulse signal input control signal line Xon of the synchronous generation of Tcon, this pulse signal moment is opened all gate drive signals, make each pixel cell all in opening, data line signal is dragged down simultaneously, discharge the electric charge in pixel capacitance, simultaneously by OLED energy supply power lead ground connection, make the driving transistors of OLED in closed condition, OLED extinguishes thereupon, thereby can eliminate power off afterimage phenomenon.
Concrete, when display device is shut down, as shown in Figure 3.In the moment of shutdown, the Xon signal produced by Tcon is high level, all grid lines are opened simultaneously, and each grid line G_out now is high level, and the switch of data line also is opened, data signal line D now is low level, all pixel capacitances discharge residual charge by data line, and in this simultaneously, the switch of VDD signal also is opened, residual charge in panel was released by VDD signal wire moment, thereby realized disappearing ghost.
The display device that the utility model embodiment provides, comprise organic light emitting display, other displays etc., and this display device comprises as above arbitrary described array base palte.
Concrete, the display device that the utility model embodiment provides can be the display device with current drives luminescent device that comprises light-emitting diode display or OLED display.
The display device that the utility model embodiment provides, comprise array base palte, this array base palte is by increasing control module on the basis in existing array base palte design, this control module is electrically connected to scan drive cell and data-driven unit respectively, for when display device is cut off the power supply, the gated sweep driver element is opened each pixel cell, thereby makes the electric charge of pixel cell storage inside to be discharged fast by data line.So, avoided in display device postboost moment, the power-off ghost shadow of AMOLED display, because the picture that exists electric charge to produce is residual, has effectively been eliminated in pixel inside, has improved the display quality of display device.
The driving method of the array base palte that the utility model embodiment provides as shown in Figure 4, comprising:
S401, when display device is switched on, scan drive cell provides line scan signals to many grid lines, the data-driven unit provides data-signal to many data lines that are scanned, and many grid lines and many data line transverse and longitudinals intersect to form the pixel unit array that matrix form is arranged.
S402, when display device is cut off the power supply, control module gated sweep driver element is opened each pixel cell, the electric charge of this pixel cell storage inside discharges fast by data line.
The array base palte driving method that the utility model embodiment provides, array base palte is by increasing control module on the basis in existing array base palte design, this control module is electrically connected to scan drive cell and data-driven unit respectively, for when display device is cut off the power supply, the gated sweep driver element is opened each pixel cell, thereby makes the electric charge of pixel cell storage inside to be discharged fast by data line.So, avoided in display device postboost moment, the power-off ghost shadow of AMOLED display, because the picture that exists electric charge to produce is residual, has effectively been eliminated in pixel inside, has improved the display quality of display device.
Wherein, the structure of array base palte has been done detailed description in the aforementioned embodiment, does not do and repeats herein.
Further, array base palte can also comprise for the power lead to the pixel cell in-line power.With reference to shown in Fig. 4, method also comprises equally:
S403, when display device is cut off the power supply, control module will be to the power lead ground connection of pixel cell in-line power.
Concrete, in the utility model embodiment, display device can adopt various OLED displays, because the OLED device is active device, therefore usually need to additionally arrange one for the power lead VDD to the energy supply of OLED device is arranged, when display device is cut off the power supply, this power lead VDD is difficult to accomplish to close in time usually, there is electric charge in the same like this inside of pixel cell that can cause, thereby produces power-off ghost shadow.Adopt a kind of like this design of control module 140 can be rapidly by power lead VDD ground connection when display device is cut off the power supply, thereby further avoided the inside residual charge of pixel cell, further improved the display quality of display device.
One of ordinary skill in the art will appreciate that: realize that the hardware that all or part of step of said method embodiment can be relevant by programmed instruction completes, aforesaid program can be stored in a computer read/write memory medium, this program, when carrying out, is carried out the step that comprises said method embodiment; And aforesaid storage medium comprises: various media that can be program code stored such as ROM, RAM, magnetic disc or CDs.
The above; it is only embodiment of the present utility model; but protection domain of the present utility model is not limited to this; anyly be familiar with those skilled in the art in the technical scope that the utility model discloses; can expect easily changing or replacing, within all should being encompassed in protection domain of the present utility model.Therefore, protection domain of the present utility model should be as the criterion with the protection domain of described claim.
Claims (7)
1. an array base palte, comprise: for the scan drive cell of line scan signals is provided to many grid lines, and for the data-driven unit of data-signal is provided to many data lines, described many grid lines and many data line transverse and longitudinals intersect to form the pixel unit array that matrix form is arranged, it is characterized in that, also comprise:
Control module, described control module is electrically connected to described scan drive cell and described data-driven unit respectively, for when display device is cut off the power supply, control described scan drive cell and open each described pixel cell, the electric charge of described pixel cell storage inside discharges fast by described data line.
2. array base palte according to claim 1, is characterized in that, described array base palte also comprises for the power lead to described pixel cell in-line power;
Described control module is also for when display device is cut off the power supply, by described power lead ground connection.
3. array base palte according to claim 2, is characterized in that, described pixel cell comprises: the first transistor, transistor seconds, memory capacitance and luminescent device;
The grid of described the first transistor connects described grid line, and its first utmost point connects the grid of described transistor seconds, and its second utmost point connects described data line;
First utmost point of described transistor seconds connects the positive pole of described luminescent device, and its second utmost point connects described power lead;
One end of described memory capacitance connects the grid of described transistor seconds, and its other end connects the negative pole of described luminescent device;
The negative pole of described luminescent device also connects public electrode.
4. array base palte according to claim 2, it is characterized in that, described scan drive cell comprises: the first scan signal line, the second scan signal line, pressure-wire, two three transistors and a plurality of four transistor corresponding with described the first scan signal line and described the second scan signal line respectively;
Described the 3rd transistorized grid connects described control module, and its first utmost point connects scan signal line, and its second utmost point connects described pressure-wire;
Described the 4th transistorized grid connects described control module, and its first utmost point connects a described grid line, and its second utmost point connects a scan signal line;
Described the first scan signal line is for providing line scan signals to the grid line of odd-numbered line line by line by described the 4th transistor;
Described the second scan signal line is for providing line scan signals to the grid line of even number line line by line by described the 4th transistor.
5. array base palte according to claim 2, is characterized in that, described data-driven unit comprises: many data signal lines, a switch signal line and a plurality of five transistors corresponding with described data signal line;
Described the 5th transistorized grid connects described switch signal line, and its first utmost point connects a described data line, and its second utmost point connects a described data signal line;
Each described data signal line is for inputting a kind of data-signal of color.
6. array base palte according to claim 5, is characterized in that, described control module comprises: for control signal wire, the 6th transistor and the 7th transistor that receives timer output signal;
Described the 6th transistorized grid connects described control signal wire, and its first utmost point connects described power lead, its second utmost point ground connection;
Described the 7th transistorized grid connects described control signal wire, and its first utmost point connects described data signal line, its second utmost point ground connection.
7. a display device, is characterized in that, described display device comprise as arbitrary as claim 1-6 as described in array base palte.
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| CN103400546A (en) * | 2013-07-25 | 2013-11-20 | 合肥京东方光电科技有限公司 | Array substrate as well as driving method and display device thereof |
| CN103943064A (en) * | 2014-03-11 | 2014-07-23 | 京东方科技集团股份有限公司 | Shut-down control method and circuit, driving circuit and AMOLED display device |
| CN104297969A (en) * | 2014-10-28 | 2015-01-21 | 京东方科技集团股份有限公司 | Liquid crystal display panel, discharging method thereof and display device |
| CN105096888A (en) * | 2015-08-28 | 2015-11-25 | 京东方科技集团股份有限公司 | Array substrate, and display panel and driving method thereof |
| CN106409226A (en) * | 2016-11-09 | 2017-02-15 | 深圳天珑无线科技有限公司 | Display screen residual image prevention method and device |
| WO2017177702A1 (en) * | 2016-04-15 | 2017-10-19 | 京东方科技集团股份有限公司 | Drive method for preventing afterimage on display panel during power-off, and display device |
| WO2018036089A1 (en) * | 2016-08-25 | 2018-03-01 | 深圳市华星光电技术有限公司 | Circuit for driving amoled pixels |
| WO2020125430A1 (en) * | 2018-12-19 | 2020-06-25 | 惠科股份有限公司 | Method and device for eliminating power-off image persistence on panel |
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| CN103400546A (en) * | 2013-07-25 | 2013-11-20 | 合肥京东方光电科技有限公司 | Array substrate as well as driving method and display device thereof |
| CN103400546B (en) * | 2013-07-25 | 2015-08-12 | 合肥京东方光电科技有限公司 | A kind of array base palte and driving method, display device |
| US9666136B2 (en) | 2013-07-25 | 2017-05-30 | Boe Technology Group Co., Ltd. | Array substrate for discharging rapidly charges stored in the pixel units when display device is powered off and driving method thereof and display device |
| CN103943064A (en) * | 2014-03-11 | 2014-07-23 | 京东方科技集团股份有限公司 | Shut-down control method and circuit, driving circuit and AMOLED display device |
| WO2015135288A1 (en) * | 2014-03-11 | 2015-09-17 | 京东方科技集团股份有限公司 | Power-off control method and circuit, drive circuit and amoled display device |
| US10152918B2 (en) | 2014-03-11 | 2018-12-11 | Boe Technology Group Co., Ltd. | Shutdown controlling method, shutdown controlling circuit, driving circuit and AMOLED display device |
| CN104297969A (en) * | 2014-10-28 | 2015-01-21 | 京东方科技集团股份有限公司 | Liquid crystal display panel, discharging method thereof and display device |
| CN105096888A (en) * | 2015-08-28 | 2015-11-25 | 京东方科技集团股份有限公司 | Array substrate, and display panel and driving method thereof |
| WO2017177702A1 (en) * | 2016-04-15 | 2017-10-19 | 京东方科技集团股份有限公司 | Drive method for preventing afterimage on display panel during power-off, and display device |
| US10446077B2 (en) | 2016-04-15 | 2019-10-15 | Boe Technology Group Co., Ltd. | Driving method for preventing image sticking of display panel upon shutdown, and display device |
| US10643535B2 (en) | 2016-04-15 | 2020-05-05 | Boe Technology Group Co., Ltd. | Driving method for preventing image sticking of display panel upon shutdown, and display device |
| WO2018036089A1 (en) * | 2016-08-25 | 2018-03-01 | 深圳市华星光电技术有限公司 | Circuit for driving amoled pixels |
| US10262591B2 (en) | 2016-08-25 | 2019-04-16 | Shenzhen China Star Optoelectronics Technology Co., Ltd | Circuit for driving amole pixel |
| CN106409226A (en) * | 2016-11-09 | 2017-02-15 | 深圳天珑无线科技有限公司 | Display screen residual image prevention method and device |
| WO2020125430A1 (en) * | 2018-12-19 | 2020-06-25 | 惠科股份有限公司 | Method and device for eliminating power-off image persistence on panel |
| US11170731B2 (en) | 2018-12-19 | 2021-11-09 | HKC Corporation Limited | Method and device of eliminating shutdown afterimage on display panel |
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