CN101226714B - Flat display device as well as control circuit and control method thereof - Google Patents
Flat display device as well as control circuit and control method thereof Download PDFInfo
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- CN101226714B CN101226714B CN2008100094662A CN200810009466A CN101226714B CN 101226714 B CN101226714 B CN 101226714B CN 2008100094662 A CN2008100094662 A CN 2008100094662A CN 200810009466 A CN200810009466 A CN 200810009466A CN 101226714 B CN101226714 B CN 101226714B
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Abstract
Disclosed are a flat panel display device and a control circuit and a control method thereof. The flat panel display device is provided with a plurality of grid drive units. Each grid drive unit can be used to control the operation of a strip of horizontal scanning lines in the flat panel display device. The flat panel display device provides a first grid high level voltage signal and a second grid high level voltage signal to the grid drive units as voltages signals transferring to the corresponding horizontal scanning lines. The first grid high level voltage signal and the second grid high level voltage signal respectively comprise a falling edge provided with a certain slope, and the duration of the falling edge of the first grid high level voltage signal is larger than that of the second grid high level voltage signal. The invention can provide different compensation effects by aiming at feed-through effects resulting from voltage transient, thereby improving the display uniformity of the flat panel display device in vertical direction.
Description
Technical field
The present invention relates to a kind of flat display apparatus, control circuit and control method thereof, and be particularly related to a kind of flat display apparatus, control circuit and control method thereof of utilizing unlike signal to drive horizontal scanning line.
Background technology
Flat-panel screens (as display panels) is a kind of display device of extensive employing.Along with the extension of demand, flat-panel screens develops toward the medium size display screen of desktop computer and the large scale display screen of family's video display gradually from originally being used for the miniature dimensions display device of portable computer.When display size increases, how to keep the homogeneity on whole the demonstration just to become an important problem.
Along with the size of display increases, the quantity of unit (being commonly referred to as pixel (Pixel)) of show image of being used for that is comprised in the display also can and then roll up.Even do not increase the speed that image upgrades, only because the increase of pixel quantity will make the voltage level change of sweep signal must could satisfy the demand on showing more and more sooner.Yet, the homogeneity that the quick variation of voltage level can make panel show all suffers from a challenge on level and vertical direction, the problem that stored voltage changes in (feed-through) pixel that phenomenon caused is worn in the feedback that must solve the capacitance coupling effect generation that makes electric capacity because of the quick variation of voltage level exactly.
Please refer to Fig. 1, it is the circuit block diagram of traditional LCD.LCD 10 mainly comprises control circuit 100, data-driven module 110, grid electrode drive module 120 and display panel 130.Required control data when control circuit 100 receives video datas and various demonstration.Video data and part control data can Be Controlled circuit 100 be converted to the required signal of data-driven module 110 and transfer to data-driven module 110; The control data of another part then is converted into the required signal of grid electrode drive module 120 and transfers to grid electrode drive module 120.Data-driven module 110 is come driving data lines 112 and 114 according to received signal, and grid electrode drive module 120 comes driven sweep line 122 and 124 according to received signal.In display panel, near pixel of getting up with frame of broken lines of each self-forming confluce of each data line 112,114 and each sweep trace 122,124 is as pixel 132.
Please refer to Fig. 2 A and Fig. 2 B, wherein Fig. 2 A is the equivalent circuit diagram of a pixel in the LCD shown in Figure 1, and Fig. 2 B then is used for the used signal waveforms of driven sweep line 122 for the grid electrode drive module 120 among Fig. 1.Pixel 132 has comprised a thin film transistor (TFT) 200, liquid crystal capacitance C
LC, storage capacitors C
SAnd stray capacitance C
GDThe grid 200c of thin film transistor (TFT) 200 is electrically coupled to sweep trace 122, and its source electrode 200a is electrically coupled to data line 114, and its drain electrode 200b is electrically coupled to liquid crystal capacitance C
LC, storage capacitors C
SAnd stray capacitance C
GDAn end.Liquid crystal capacitance C
LCWith storage capacitors C
SThe other end be electrically coupled to common voltage V
COM, stray capacitance C
GDThe other end then be electrically coupled to sweep trace 122.When the signal as Fig. 2 B is applied on the sweep trace 122, after grid low-voltage Vgl arrives grid high voltage Vgh through rising edge RE, because grid 200c has been applied in grid high voltage Vgh, so thin film transistor (TFT) 200 meeting conductings; Otherwise, from grid high voltage Vgh through falling edge FE and after changing into grid low-voltage Vgl, because the voltage of grid 200c descends, so therefore thin film transistor (TFT) 200 will end.Yet, the stray capacitance C between grid 200c that the quick voltage variation of rising edge RE and falling edge FE can make at thin film transistor (TFT) 200 and the drain electrode 200b
GDProduce capacitance coupling effect, and therefore changed the voltage of preserving in drain electrode 200b place originally, make liquid crystal capacitance C
LCThe potential difference (PD) at two ends is different with the potential difference (PD) of estimating storage originally, and the gap between the potential difference (PD) that the potential difference (PD) of this physical holding of the stock and script are estimated to store is called feedback and wears voltage (feed-throughvoltage) V
f
If voltage V is worn in the feedback in whole viewing area 130
fAll identical, so such problem ratio is easier to solve, but voltage V is worn in the feedback that each pixel faced in the in fact whole viewing area 130
fBut more or less exist some gaps.In the horizontal direction, voltage V is worn in feedback
fUnevenness mainly from the signal delay on the sweep trace because this make on same the sweep trace thin film transistor (TFT) by the time performance inconsistent; Difference on the vertical direction is then mainly from pressure drop that electric current and resistance caused.Because grid high voltage Vgh on the sweep trace and grid low-voltage Vgl be when being applied to panel, can be because use various different conductors to produce pressure drop as resistance that cabling produced, these leads may be plain conductor or film wire etc.In any case when carrying out the signal transmission through above-mentioned lead, grid pressure reduction (Vgh-Vgl) can reduce gradually along with the downward transmission of voltage signal.Voltage V is worn in feedback
fCan obtain by following formula:
C wherein
GD, ONStray capacitance C when being thin film transistor (TFT) 200 conductings
GDSize.This shows that if grid pressure reduction changes in vertical direction to some extent, then voltage V is worn in feedback
fUnavoidable ground can be changed.
In order to address the above problem, prior art provides many corresponding solutions.These solutions all are that to wear demonstration that phenomenon causes at the feedback on the horizontal scanning line inhomogeneous and propose, and have reached the effect of improving to a certain degree really.For example United States Patent (USP) the 6th, 359, and No. 607, the 6th, 867, No. 760, the 7th, 027, No. 024 and U.S. Patent Application Publication No. 2006/0077163 etc. have all proposed corresponding solution.Yet process experiment showed, that these solutions can only solve the uneven problem of demonstration on the horizontal direction, and can not solve the uneven problem of demonstration of vertical direction.As following table one show 40 inches panels use during drive signal, at the grid pressure reduction of each regional gained (supposing display panel is divided into 4 * 4 block):
Table one
| 5.99 | 6.27 | 6.31 | 6.25 |
| 6.00 | 6.27 | 6.31 | 6.25 |
| 6.00 | 6.26 | 6.31 | 6.24 |
| 6.02 | 6.28 | 6.33 | 6.28 |
After having used the technology that for example United States Patent (USP) is provided for the 6th, 359, No. 607, same panel at the grid pressure reduction of each regional gained then shown in following table two:
Table two
| 6.23 | 6.29 | 6.35 | 6.31 |
| 6.26 | 6.32 | 6.37 | 6.33 |
| 6.26 | 6.32 | 6.37 | 6.33 |
| 6.27 | 6.33 | 6.37 | 6.37 |
As from the foregoing, using United States Patent (USP) the 6th, 359, after the technology that No. 607 are provided, grid pressure reduction on the horizontal direction or to a certain degree improvement is arranged, but in vertical direction, the variation of grid pressure reduction does not then not only improve, and the variation of the grid pressure reduction the when variation of the grid pressure reduction of some part is also than the former present technique of use on the contrary comes greatlyyer.In other words, after use this technology, the show uniformity of vertical direction is variation on the contrary.
So to those skilled in the art, how to make that display panel demonstration in vertical direction can be more even, problem still to be overcome really.
Summary of the invention
One of them purpose of the present invention is to provide a kind of control method of flat display apparatus, and it can improve flat display apparatus show uniformity in vertical direction.
Another object of the present invention is to provide a kind of control circuit of flat display apparatus, it can improve flat display apparatus show uniformity in vertical direction equally.
Another object of the present invention is to provide a kind of flat display apparatus, the control circuit of its use and control method make this flat display apparatus show uniformity in vertical direction can obtain suitable lifting.
Other purposes of the present invention and advantage can be further understood from the disclosed technical characterictic of the present invention.
For reaching above-mentioned one or part or all of purpose or other purposes, the present invention proposes a kind of control method of flat display apparatus, it is applicable in the flat display apparatus with a plurality of drive element of the grid that each drive element of the grid is in order to the operation of a horizontal scanning line in the control plane display device.This control method comprises provides a first grid high level voltage signal and second grid high level voltage signal to aforementioned drive element of the grid, with these grid high level voltage signals as being passed to and these drive element of the grid voltage signal of corresponding horizontal scanning line respectively.First grid high level voltage signal and second grid high level voltage signal comprise the falling edge that possesses certain certain slope respectively, and the duration of the falling edge of first grid high level voltage signal is greater than the duration of the falling edge of second grid high level voltage signal.
In the aforesaid control method, provide this first grid high level voltage signal and this second grid high level voltage signal to the step of described a plurality of drive element of the grid to comprise: to provide first grid driver element to described a plurality of drive element of the grid with this first grid high level voltage signal; And provide second grid driver element to described a plurality of drive element of the grid with this second grid high level voltage signal; Wherein, start described a plurality of drive element of the grid, described a plurality of drive element of the grid tandems are arranged to receive this enable signal in regular turn with enable signal.
In the present invention, use aforesaid control method to produce an original grid high level voltage, the first top rake control signal and the second top rake control signal that possesses the steady job cycle earlier.Make this original grid high level voltage with reference to the first top rake control signal afterwards, produce above-mentioned first grid high level voltage signal in the work period of the first top rake control signal, progressively to reduce this original grid high level voltage; Similarly, also can make original grid high level voltage where necessary, produce above-mentioned second grid high level voltage signal in the work period of the second top rake control signal, progressively to reduce original grid high level voltage with reference to the second top rake control signal.The work period of the first top rake control signal is greater than the work period of the second top rake control signal.
The present invention also provides a kind of control circuit of flat display apparatus, and it is applicable to enable signal and starts on the flat display apparatus of many horizontal scanning lines.This control circuit comprises signal generator module, first grid driver element and second grid driver element.Signal generator module is in order to produce first grid high level voltage signal and second grid high level voltage signal.The first grid driver element is electrically coupled to signal generator module, to receive first grid high level voltage signal as the voltage signal that provides to one of horizontal scanning line.The second grid driver element is electrically coupled to signal generator module, to receive second grid high level voltage signal as the voltage signal that provides to one of horizontal scanning line.First grid driver element and second grid driver element electric property coupling are to transmit enable signal in regular turn, first grid high level voltage signal and second grid high level voltage signal comprise the falling edge that possesses a certain slope respectively, and the duration of the falling edge of first grid high level voltage signal is greater than the duration of the falling edge of second grid high level voltage signal.
In the present invention, aforesaid signal generator module comprises top rake control signal generating unit and grid high level voltage signal generation unit.The top rake control signal generating unit is in order to produce the first top rake control signal and the second top rake control signal in different operating cycle.Grid high level voltage signal generation unit is electrically coupled to the top rake control signal generating unit, to accept the first top rake control signal and the second top rake control signal, change the falling edge of original grid high level voltage respectively according to the first top rake control signal and the second top rake control signal, produce corresponding first grid high level voltage signal and second grid high level voltage signal respectively.
In the aforesaid control circuit, this first grid driver element can be electrically coupled to this signal generator module via same electrical path with this second grid driver element, makes this first grid high level voltage signal and this second grid high level voltage signal to be received by this first grid driver element and this second grid driver element.
In the aforesaid control circuit, this first grid driver element also can be electrically coupled to this signal generator module via different electrical paths respectively with this second grid driver element.
The present invention also provides a kind of flat display apparatus, and it comprises display panel, a plurality of data-drivens unit and control circuit.Display panel comprises many data lines, multi-strip scanning line and a plurality of pixel cell.Data line extends in parallel on display panel image data used when transmitting show image with first direction; Sweep trace extends in parallel on display panel with second direction; Pixel cell is formed near data line and the sweep trace confluce, and these pixel cells of sweep trace decision whether the startup.A plurality of data-drivens unit is electrically coupled to each data line used image data so that show image to be provided respectively.Control circuit comprises signal generator module, first grid driver element and second grid driver element.Signal generator module is in order to produce first grid high level voltage signal and second grid high level voltage signal.The first grid driver element is electrically coupled to signal generator module, to receive first grid high level voltage signal as the voltage signal that provides to one of horizontal scanning line.The second grid driver element is electrically coupled to signal generator module, to receive second grid high level voltage signal as the voltage signal that provides to one of horizontal scanning line.First grid driver element and second grid driver element electric property coupling are to transmit enable signal in regular turn.First grid high level voltage signal and second grid high level voltage signal comprise the falling edge that possesses a certain slope respectively, and the duration of the falling edge of first grid high level voltage signal is greater than the duration of the falling edge of second grid high level voltage signal.
In the aforesaid flat display apparatus, this signal generator module can comprise: the top rake control signal generating unit, in order to produce the first top rake control signal and the second top rake control signal in different operating cycle; And grid high level voltage signal generation unit, be electrically coupled to this top rake control signal generating unit, to accept this first top rake control signal and this second top rake control signal, and change falling edge duration of original grid high level voltage respectively according to this first top rake control signal and this second top rake control signal, to produce this first grid high level voltage signal and this second grid high level voltage signal respectively.
In the aforesaid flat display apparatus, this first grid driver element can be electrically coupled to this signal generator module via same electrical path with this second grid driver element, and this first grid high level voltage signal and this second grid high level voltage signal can both be received by this first grid driver element and this second grid driver element.
In the aforesaid flat display apparatus, this first grid driver element also can be electrically coupled to this signal generator module via different electrical paths respectively with this second grid driver element.
The present invention provides different drive signals to different drive element of the grid, and the identical but duration difference that descends of the falling edge slope of these drive signals, so can provide different feedbacks to wear effect compensating for the diverse location on the display panel.Testing the result factually can learn, this kind mode can provide than the better vertical direction show uniformity of prior art.
For above-mentioned and other purposes, feature and advantage of the present invention can be become apparent, preferred embodiment cited below particularly and conjunction with figs. elaborate.
Description of drawings
Fig. 1 is the circuit block diagram of traditional LCD.
Fig. 2 A is the equivalent circuit diagram of a pixel.
Used signal waveforms when Fig. 2 B is used for the driven sweep line for the grid electrode drive module among Fig. 1.
Fig. 3 is the circuit block diagram of flat display apparatus according to an embodiment of the invention.
Fig. 4 is the oscillogram of two kinds of different grid high level voltage signals according to an embodiment of the invention.
Fig. 5 is for producing the process flow diagram of the grid high level voltage signal of the falling edge that possesses various durations according to an embodiment of the invention.
Fig. 6 is for producing the waveform relationship synoptic diagram of the grid high level voltage signal of the falling edge that possesses various durations according to an embodiment of the invention.
Fig. 7 is the circuit block diagram of signal generator module according to an embodiment of the invention.
Fig. 8 is the circuit block diagram of control circuit according to another embodiment of the present invention.
Wherein, description of reference numerals is as follows:
10: LCD
30: flat display apparatus
31: the data-driven module
32,82: control circuit
100: control circuit
110: the data-driven module
112,114,340,342,344: data line
120: grid electrode drive module
122,124,350,352,354: sweep trace
130: display panel
132: pixel
200: thin film transistor (TFT)
200a: source electrode
200b: drain electrode
200c: grid
310,312,314: the data-driven unit
320,322,324,820,822,824: drive element of the grid
330,830: signal generator module
360,362,364: pixel cell
400,410,600b, 610b, 620b, VG1～VGn: grid high level voltage signal
400a, 410a, 601,611,621: falling edge
600,610,620: original grid high level voltage
600a, 610a, 620a, YC1～YCn: top rake control signal
700: the top rake control signal generating unit
710: grid high level voltage signal generation unit
712: the original signal generation unit
714～718: treatment circuit
C
LC: liquid crystal capacitance
C
S: storage capacitors
C
GD: stray capacitance
S500～S520: the administration step of one embodiment of the invention
Embodiment
About aforementioned and other technology contents, characteristics and effect of the present invention, in the DETAILED DESCRIPTION OF THE PREFERRED of following cooperation reference diagram, can clearly present.
Please refer to Fig. 3, it is a circuit block diagram according to an embodiment of the invention.In the present embodiment, flat display apparatus 30 has comprised display panel 300, data-driven module 31 and control circuit 32.In display panel 300, be provided with many data lines 340,342 and 344, multi-strip scanning line 350,352 and 354, and be positioned at each data line and near the pixel cell 360,362 and 364 of each sweep trace intersection.Data-driven module 31 has comprised a plurality of data-drivens unit 310,312 and 314, and control circuit 32 has comprised a plurality of drive element of the grid 320,322 and 324 and signal generator module 330.Each pixel cell 360,362 and 364 equivalent circuit diagram are as described above shown in Fig. 2 A, do not repeat them here, the quantity of above-mentioned data line, sweep trace, pixel cell, data-driven unit, drive element of the grid and signal generator module is in order to convenient explanation embodiment, but the quantity when not limiting practical application with this.
As shown in the figure, each data line 340,342 and 344 extends in parallel on display panel 300 along specific direction (claiming " first direction " later on), and each sweep trace 350,352 and 354 then extends in parallel on display panel 300 along another specific direction (claiming " second direction " later on).Data line 340,342 and 344 used image data when transmitting show image respectively, 350,352 and 354 of sweep traces are used for transmitting the sweep signal that whether starts pixel cell 360,362 and 364 respectively.
When using sweep trace 350,352 and 354 to transmit the signal that starts pixel cell 360,362 and 364, drive element of the grid 320,322 and 324 must provide corresponding grid high level voltage signal to sweep trace 350,352 and 354.In the present embodiment, the grid high level voltage signal that these are provided by drive element of the grid 320,322 and 324, and be used for controlling these drive element of the grid 320,322 and 324 enable signals that when move, generate by signal generator module 330.Enable signal is by in regular turn from drive element of the grid 320 toward drive element of the grid 322 and 324 direction transmission, after a drive element of the grid (for example drive element of the grid 322) is activated because of enable signal, that drive element of the grid will make received grid high level voltage signal be able to by and be passed on the corresponding sweep trace (for example sweep trace 352).In addition, in order to wear phenomenon in response to feedback in various degree, signal generator module 330 will produce two kinds of different grid high level voltage signals at least to offer drive element of the grid 320,322 and 324.
Please merge with reference to Fig. 4, it is the oscillogram of two kinds of different grid high level voltage signals according to an embodiment of the invention.Grid high level voltage signal 400 shown in Fig. 4 is identical with 410 work period, and the falling edge 400a with pitch angle is also identical with the slope of 410a, but this duration with the falling edge 400a at pitch angle and 410a is inequality.In the present embodiment, the duration of falling edge 400a is t
1, the duration of falling edge 410a then is t
2, and t
1＞t
2Because voltage V is worn in the feedback that each pixel cell faced in display panel 300
fMore or less exist some gaps.Especially, difference in vertical direction is mainly from pressure drop that conductor resistance caused, because grid high voltage Vgh on the sweep trace and grid low-voltage Vgl are when injecting panel, can experience the resistance that metal routing or film wire (on glass substrate) are caused, so grid pressure reduction (Vgh-Vgl) can reduce gradually along with the downward transmission of voltage signal.Voltage V is worn in feedback
fCan obtain by following formula:
C
GD, ONStray capacitance C when being thin film transistor (TFT) 200 conductings shown in Fig. 2 A
GDSize.Therefore, from signal generator module 330 drive element of the grid (as in Fig. 3, drive element of the grid 322 is compared just farther from signal generator module with drive element of the grid 320) far away, because its grid pressure reduction diminishes, so voltage V is worn in feedback
fAlso can and then diminish.Be conceived to this, possess grid high level voltage signal 400 (claiming first grid high level voltage signal later on) than the long duration falling edge and can be provided to from the nearer drive element of the grid of signal generator module 330, the grid high level voltage signal 410 (claiming second grid high level voltage signal later on) that possesses shorter duration falling edge then is provided to from signal generator module 330 drive element of the grid far away.
Below will illustrate and how produce the aforementioned grid high level voltage signal 400 that possesses the falling edge of various durations.Please refer to Fig. 5, it is for producing the process flow diagram of the grid high level voltage signal of the falling edge that possesses various durations according to an embodiment of the invention.
In step S500, produced an original grid high level voltage that uses as benchmark earlier.Next, in step S510, then produced a plurality of top rake control signals, and each top rake control signal has the different work periods.After original grid high level voltage and top rake control signal are generated, flow process just can enter step S520, make original grid high level voltage respectively with reference to each top rake signal, make the corresponding top rake signal of an original grid high level voltage whereby, and make this original grid high level voltage in the work period of pairing top rake signal, progressively reduce voltage, form a corresponding grid high level voltage signal.
Please refer to Fig. 6, it is for producing the waveform relationship synoptic diagram of the grid high level voltage signal of the falling edge that possesses various durations according to an embodiment of the invention.The original grid high level voltage that is produced in step S500 i.e. any in as shown in Figure 6 the original grid high level voltage 600,610 or 620, and its amplitude shakes between voltage Vgh and Vgl.The top rake control signal of being mentioned among the step S510 specifically then can be as shown in Figure 6 top rake control signal 600a, 610a and 620a, it has different work period t respectively
3, t
4With t
5As shown in Figure 6, original grid high level voltage 600 in the present embodiment corresponds to top rake control signal 600a, original grid high level voltage 610 corresponds to top rake control signal 610a, and original grid high level voltage 620 then corresponds to top rake control signal 620a.The magnitude of voltage of original grid high level voltage 600 is at the work period t of top rake control signal 600a
3Within descend gradually with a fixing slope, finally formed grid high level voltage signal 600b with falling edge 601.Similarly, the magnitude of voltage of original grid high level voltage 610 is at the work period t of top rake control signal 610a
4Within descend gradually with same slope, finally formed grid high level voltage signal 610b with falling edge 611; The magnitude of voltage of original grid high level voltage 620 is at the work period t of top rake control signal 620a
5Within descend gradually with same slope, finally formed grid high level voltage signal 620b with falling edge 621.
Though utilized a plurality of original grid high level voltages to produce corresponding grid high level voltage signal in the embodiment shown in fig. 6, but in fact also can only produce an original grid high level voltage as shown in Figure 7, again this original grid high level voltage is sent simultaneously to a plurality of circuit carrying out alignment processing with aforesaid each top rake control signal respectively, thereby produce different grid high level voltage signals.
Please refer to Fig. 7, it is the circuit block diagram of signal generator module according to an embodiment of the invention.Top rake control signal generating unit 700 produces a plurality of different top rake control signal YC1, YC2 to YCn, and these top rake control signals YC1, YC2 are provided to grid high level voltage signal generation unit 710 to YCn.Grid high level voltage signal generation unit 710 can utilize original signal generation unit 712 to produce an original grid high level voltage as shown in Figure 6 in inside earlier, and utilize this original grid high level voltage, in a plurality of treatment circuits 714～718, received top rake control signal YC1, YC2 are handled to YCn, thereby obtain corresponding grid high level voltage signal VG1, VG2 to VGn.Certainly, grid high level voltage signal generation unit 710 used original grid high level voltages also can be earlier generate from other circuit of flat display apparatus and offer grid high level voltage signal generation unit 710 again and use, and the circuit diagram shown in this embodiment does not limit the invention in the circuit design mode when implementing.
Except circuit and method that above-described embodiment provided, on execution details of the present invention, also have many parts that can trickle adjustment.For instance, please refer to Fig. 8, it is the circuit block diagram of control circuit according to another embodiment of the present invention.In the present embodiment, signal generator module 830 provides different grid high level voltage signal to drive element of the grid 820,822 and 824 equally.Drive element of the grid 320,322 among Fig. 3 and 324 uses same electrical path to be electrically coupled to signal generator module 330, so each grid high level voltage signal that signal generator module 300 is provided can all be received by these drive element of the grid; Compare with Fig. 3, drive element of the grid 820,822 and 824 in the control circuit 82 shown in Figure 8 is to use different electrical paths to be electrically coupled to signal generator module 830, so each grid high level voltage signal can be delivered in the corresponding drive element of the grid independently respectively.
In addition, for example can make a plurality of drive element of the grid consist of one group of drive element of the grid, and make this group drive element of the grid use same grid high level voltage signal; Or the top rake control signal generating unit 700 among Fig. 7 can utilize mode in proper order to export each top rake control signal YC1, YC2 one by one to YCn, but not uses the parallel way of output as shown in Figure 7; Or the circuit design position etc. of signal generator module for example, can be adjusted being enough to reach under the prerequisite of technological core of the present invention.
Because grid high level voltage signal of the present invention was caused with the same slope different duration of decline, so the voltage that moment descends will change therefore and to some extent, just can wear effect whereby different compensation effects is provided for the feedback that produces because voltage instantaneous changes.
Arbitrary embodiment of the present invention or claim scope need not to reach above-mentioned whole purposes of the present invention or advantage or characteristics.In addition, summary part and title only are used for assisting the patent document search, are not to be used for limiting interest field of the present invention.
Though the present invention with preferred embodiment openly as above; yet it is not in order to qualification the present invention, any those skilled in the art, without departing from the spirit and scope of the present invention; when can doing certain change and modification, so protection scope of the present invention should be as the criterion with claims.
Claims (10)
1. the control method of a flat display apparatus, be applicable in the flat display apparatus with a plurality of drive element of the grid, each described a plurality of drive element of the grid is characterized in that may further comprise the steps in order to control the operation of the horizontal scanning line in this flat display apparatus:
Provide first grid high level voltage signal and second grid high level voltage signal to described a plurality of drive element of the grid, with as the voltage signal that is passed to corresponding this horizontal scanning line, wherein this first grid high level voltage signal and this second grid high level voltage signal comprise possessing the falling edge that slope is arranged respectively, and the duration of this falling edge of this first grid high level voltage signal is greater than the duration of this falling edge of this second grid high level voltage signal;
Provide this first grid high level voltage signal and this second grid high level voltage signal to the step of described a plurality of drive element of the grid may further comprise the steps:
Provide first grid driver element to described a plurality of drive element of the grid with this first grid high level voltage signal; And
Provide second grid driver element to described a plurality of drive element of the grid with this second grid high level voltage signal;
Wherein, start described a plurality of drive element of the grid, with described a plurality of grids with enable signal
The driver element tandem is arranged to receive this enable signal in regular turn.
2. control method as claimed in claim 1, further comprising the steps of:
Generation possesses the original grid high level voltage in steady job cycle;
Produce the first top rake control signal and the second top rake control signal;
Make this original grid high level voltage with reference to this first top rake control signal, produce this first grid high level voltage signal in the work period of this first top rake control signal, progressively to reduce this original grid high level voltage; And
Make this original grid high level voltage with reference to this second top rake control signal, produce this second grid high level voltage signal in the work period of this second top rake control signal, progressively to reduce this original grid high level voltage;
Wherein, the work period of this first top rake control signal is greater than the work period of this second top rake control signal.
3. the control circuit of a flat display apparatus is applicable to the flat display apparatus that starts many horizontal scanning lines with enable signal, and this control circuit comprises:
Signal generator module produces first grid high level voltage signal and second grid high level voltage signal;
The first grid driver element is electrically coupled to this signal generator module, to receive this first grid high level voltage signal as the voltage signal that provides to one of described many horizontal scanning lines; And
The second grid driver element is electrically coupled to this signal generator module, to receive this second grid high level voltage signal as the voltage signal that provides to one of described many horizontal scanning lines;
Wherein, this first grid driver element and this second grid driver element electric property coupling are to transmit this enable signal in regular turn, and this first grid high level voltage signal and this second grid high level voltage signal comprise possessing the falling edge that slope is arranged respectively, and the duration of this falling edge of this first grid high level voltage signal is greater than the duration of this falling edge of this second grid high level voltage signal.
4. control circuit as claimed in claim 3, wherein this signal generator module comprises:
The top rake control signal generating unit is in order to produce the first top rake control signal and the second top rake control signal in different operating cycle; And
Grid high level voltage signal generation unit, be electrically coupled to this top rake control signal generating unit, to accept this first top rake control signal and this second top rake control signal, and change the falling edge of original grid high level voltage respectively according to this first top rake control signal and this second top rake control signal, to produce this first grid high level voltage signal and this second grid high level voltage signal respectively.
5. control circuit as claimed in claim 3, wherein this first grid driver element and this second grid driver element are electrically coupled to this signal generator module via same electrical path, make this first grid high level voltage signal and this second grid high level voltage signal to be received by this first grid driver element and this second grid driver element.
6. control circuit as claimed in claim 3, wherein this first grid driver element is electrically coupled to this signal generator module via different electrical paths respectively with this second grid driver element.
7. flat display apparatus comprises:
Display panel comprises:
Many data lines extend in parallel on this display panel with first direction, used image data when transmitting show image;
The multi-strip scanning line extends in parallel on this display panel with second direction; And
A plurality of pixel cells are formed near described many data lines and the described multi-strip scanning line confluce, and the described a plurality of pixel cell of described multi-strip scanning line decision whether the startup;
A plurality of data-drivens unit is electrically coupled to described many data lines used image data so that show image to be provided respectively; And
Control circuit comprises:
Signal generator module produces first grid high level voltage signal and second grid high level voltage signal;
The first grid driver element is electrically coupled to this signal generator module to receive this first grid high level voltage signal as providing to the voltage signal of one of described multi-strip scanning line; And
The second grid driver element is electrically coupled to this signal generator module to receive this second grid high level voltage signal as providing to the voltage signal of one of described multi-strip scanning line;
Wherein, this first grid driver element and this second grid driver element electric property coupling are to transmit enable signal in regular turn, this enable signal is with deciding what person who starts in the described multi-strip scanning line, and this first grid high level voltage signal and this second grid high level voltage signal comprise possessing the falling edge that slope is arranged respectively, and the duration of this falling edge of this first grid high level voltage signal is greater than the duration of this falling edge of this second grid high level voltage signal.
8. flat display apparatus as claimed in claim 7, wherein this signal generator module comprises:
The top rake control signal generating unit is in order to produce the first top rake control signal and the second top rake control signal in different operating cycle; And
Grid high level voltage signal generation unit, be electrically coupled to this top rake control signal generating unit, to accept this first top rake control signal and this second top rake control signal, and change falling edge duration of original grid high level voltage respectively according to this first top rake control signal and this second top rake control signal, to produce this first grid high level voltage signal and this second grid high level voltage signal respectively.
9. flat display apparatus as claimed in claim 7, wherein this first grid driver element and this second grid driver element are electrically coupled to this signal generator module via same electrical path, and this first grid high level voltage signal and this second grid high level voltage signal can both be received by this first grid driver element and this second grid driver element.
10. flat display apparatus as claimed in claim 7, wherein this first grid driver element is electrically coupled to this signal generator module via different electrical paths respectively with this second grid driver element.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100094662A CN101226714B (en) | 2008-02-02 | 2008-02-02 | Flat display device as well as control circuit and control method thereof |
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| CN2008100094662A CN101226714B (en) | 2008-02-02 | 2008-02-02 | Flat display device as well as control circuit and control method thereof |
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| CN101226714A CN101226714A (en) | 2008-07-23 |
| CN101226714B true CN101226714B (en) | 2010-09-22 |
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Families Citing this family (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI483236B (en) * | 2009-06-15 | 2015-05-01 | Au Optronics Corp | Liquid crystal display and driving method thereof |
| CN101593496B (en) * | 2009-06-26 | 2013-08-14 | 友达光电股份有限公司 | Grid output control method |
| CN101587700B (en) * | 2009-06-26 | 2011-11-09 | 友达光电股份有限公司 | Liquid crystal display and method for driving same |
| CN102034440B (en) * | 2009-09-24 | 2012-12-19 | 瑞鼎科技股份有限公司 | Gate driver and operating method thereof |
| CN101699552B (en) * | 2009-11-16 | 2012-04-18 | 友达光电股份有限公司 | Grid output control method and corresponding grid pulse modulator |
| CN101866608B (en) * | 2010-06-01 | 2012-06-27 | 友达光电（苏州）有限公司 | Grid power supply control circuit and liquid crystal display driving circuit |
| CN102622951B (en) * | 2011-01-30 | 2015-11-18 | 联咏科技股份有限公司 | Gate pole driver and relevant display device |
| TWI440011B (en) * | 2011-10-05 | 2014-06-01 | Au Optronics Corp | Liquid crystal display having adaptive pulse shaping control mechanism |
| CN102402958B (en) * | 2011-11-16 | 2014-03-26 | 深圳市华星光电技术有限公司 | Method for driving liquid crystal panel |
| CN103177703B (en) * | 2013-03-27 | 2015-05-13 | 京东方科技集团股份有限公司 | Grid driving circuit, display panel and display device |
| CN103247276B (en) | 2013-04-25 | 2015-03-18 | 北京京东方光电科技有限公司 | Gate drive circuit and array substrate |
| CN103247280B (en) * | 2013-05-14 | 2016-02-03 | 深圳市华星光电技术有限公司 | Top rake circuit and control method thereof |
| CN103745694A (en) * | 2013-11-27 | 2014-04-23 | 深圳市华星光电技术有限公司 | Driving method and driving circuit of display panel |
| CN104332145B (en) * | 2014-11-07 | 2017-03-01 | 深圳市华星光电技术有限公司 | Liquid crystal panel and its driving method, liquid crystal display |
| CN105070243B (en) | 2015-09-15 | 2017-10-31 | 重庆京东方光电科技有限公司 | Gate turn-on voltage compensation circuit, display panel, driving method and display device |
| CN105280152B (en) * | 2015-11-20 | 2018-09-28 | 深圳市华星光电技术有限公司 | Scanning drive signal method of adjustment and scan drive circuit |
| CN106847153B (en) * | 2017-01-22 | 2019-11-19 | 惠科股份有限公司 | A kind of scanning circuit, the driving method for showing equipment and scanning circuit |
| CN114648967B (en) * | 2022-03-16 | 2023-07-25 | Tcl华星光电技术有限公司 | Liquid crystal display panel and display device |
-
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