CN103187018A - Active array display, scanning line drive circuit of active array display and scanning line drive method of active array display - Google Patents
Active array display, scanning line drive circuit of active array display and scanning line drive method of active array display Download PDFInfo
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- CN103187018A CN103187018A CN2011104535488A CN201110453548A CN103187018A CN 103187018 A CN103187018 A CN 103187018A CN 2011104535488 A CN2011104535488 A CN 2011104535488A CN 201110453548 A CN201110453548 A CN 201110453548A CN 103187018 A CN103187018 A CN 103187018A
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Abstract
The invention provides a scanning line drive method of an active array display. The method includes: dividing a plurality of scanning lines of the active array display into S groups, connecting each scanning line with one scanning lead, arranging S-1 scanning lines between two adjacent scanning lines in each group, S>=2 and is an integer; exerting drive signals on the scanning leads which are connected with the plurality of scanning lines of the active array display line by line, and enabling luminance of line pixels to match with each other, and the luminance of the line pixels corresponds to the Mth scanning lines in all the groups. In addition, the invention further provides a drive circuit of the scanning lines of the active array display and an active array display with the drive circuit. Due to the adoption of the technical scheme, the problem that display effects of scanning lines of an existing active array display are not the same is solved.
Description
Technical field
The present invention relates to the demonstration field, relate in particular to the scanning line driving method of a kind of active array display, this active array display, the scan line drive circuit of this active array display.
Background technology
Existing active array display comprises pel array, the multi-strip scanning line that is connected with this pel array and many data lines that are connected with this pel array, each pixel comprises pixel electrode and thin film transistor (TFT) TFT, it (is that pixel electrode is electrically connected with the drain electrode of TFT that this pixel electrode couples with corresponding sweep trace and data line by thin film transistor (TFT) TFT, sweep trace is electrically connected with the grid of TFT, and data line is electrically connected with the source electrode of TFT).In the procedure for displaying, the scan line drive circuit of active array display (being generally integrated circuit (IC)) is opened the TFT of each row pixel line by line, and the data line drive circuit of active array display is opened device in each row pixel TFT the pixel electrode of this row pixel is applied pixel voltage.
In the prior art, the active array display has viewing area (ACTIVE AREA, pel array is arranged at the viewing area) and non-display area (FAN-OUT AREA), each bar sweep trace comprises the main scanning line that is positioned at the viewing area and is positioned at the scanning lead-in wire of non-display area that scan line drive circuit will drive the main scanning line that signal imposes on the viewing area by the scanning lead-in wire.Distortion can take place in the scan line driving signal of scan line drive circuit output behind the overscanning lead-in wire, because the scanning lead resistance of each bar sweep trace is inequality, the distortion level of corresponding scan line driving signal is just different, and then cause the leaping voltage (kick-back voltage) of each row pixel also different, finally cause the brightness difference of adjacent lines pixel, the horizontal band of image appearance of demonstration.
In order to eliminate above-mentioned horizontal band, the resistance that the length that goes between by the scanning of adjusting each bar sweep trace in the prior art, material etc. make the scanning of each bar sweep trace go between mates as much as possible.But, because the restriction of technology and material, make each bar sweep trace the scanning lead-in wire resistance accurately coupling be very difficult, horizontal band is difficult to eliminate well.
Summary of the invention
The technical problem to be solved in the present invention is that the resistance of the scanning lead-in wire of each bar sweep trace in the existing active array display is difficult to accurate coupling, and horizontal band is difficult to eliminate well.
For addressing the above problem, the invention provides a kind of scanning line driving method of active array display, comprising:
The multi-strip scanning line of described active array display is divided into the S group, and every sweep trace connects a scanning lead-in wire, the S-1 bar sweep trace of being separated by between the adjacent scanning lines in every group, and S 〉=2, S is integer;
The scanning lead-in wire that the multi-strip scanning line of described active array display is connected applies the driving signal line by line, and makes that the brightness of the capable pixel of M bar sweep trace correspondence is complementary in each group, and M is positive integer.
Alternatively, the method that makes the brightness of the capable pixel of M bar sweep trace correspondence in each group be complementary to adopt is the realization that is complementary of leaping voltage by the capable pixel of M bar sweep trace correspondence in each group of control.
Alternatively, the method that makes the leaping voltage of the capable pixel of M bar sweep trace correspondence in each group be complementary to adopt is to regulate the go between pulse waveform of the driving signal that applies of the scanning that M bar sweep trace in each group is connected.
Alternatively, the described adjusting method that drives the pulse waveform of signal comprises one of them or its combination of following A, B, C method:
A, use stepped pulse waveform;
The pulse height of B, the described pulse waveform of adjusting;
Rise time and/or the fall time of C, the described pulse waveform of change.
Alternatively, described stepped pulse waveform comprises first high level and second high level, and described first high level is greater than described second high level.
Alternatively, during the stepped pulse waveform of described use, duration by increasing described second high level and/or the size that reduces described second high level realize reducing described leaping voltage, realize increasing described leaping voltage by the duration that reduces described second high level and/or the size that increases described second high level.
Alternatively, described pulse waveform is the waveform that is formed by single high level.
Alternatively, during pulse waveform that described use is formed by single high level, realize reducing described leaping voltage by the size that reduces described single high level, realize increasing described leaping voltage by the size that increases described single high level.
Alternatively, the bar number of the described sweep trace group that divides exactly branch is counted S.
Alternatively, described S is even number.
Alternatively, the pulse waveform difference of the driving signal that the scanning lead-in wire that M bar sweep trace connects in each group is corresponding.
The pulse waveform of the driving signal that the scanning lead-in wire that alternatively, each bar sweep trace connects in same group is corresponding is identical.
The present invention also provides a kind of active array display to comprise the multi-strip scanning line, and every sweep trace connects a scanning lead-in wire, and described multi-strip scanning line is divided into the S group, the S-1 bar sweep trace of being separated by between the adjacent scanning lines in every group, and S 〉=2, S is integer;
Described scan line drive circuit comprises:
S pulse waveform generation module, the scanning lead-in wire that connects to described S group sweep trace provides pulse waveform respectively;
Shift register is used for described S pulse waveform generation module of control and exports described pulse waveform line by line to the scanning lead-in wire of the multi-strip scanning line connection of described active array display.
Alternatively, each described pulse waveform generation module comprises:
Timer, be H its time-count cycle;
Register is used for parameter storage time;
Comparer, between described timer clocked and described time parameter make comparisons the output comparative result;
First multiplexer, have two input ends that connect first high level and second high level respectively, with the control end that links to each other with described comparator output terminal, described first multiplexer is the pulse waveform that repeats to export first high level and the formation of second high level cycle with H according to the comparative result of described comparer output;
A plurality of second multiplexers, each described second multiplexer has two input ends that connect low level and the described first multiplexer output terminal respectively, with the control end that links to each other with the corresponding output end of described shift register, the scanning lead-in wire output that described a plurality of second multiplexers connect to corresponding sweep trace under the control of described shift register comprises the pulse waveform of first high level and second high level.
Alternatively, the number of scanning lines in the scanline groups that the number of second multiplexer equals to be attached thereto in the described pulse waveform generation module.
Alternatively, it is to export opening signal by the corresponding output terminal that makes described shift register to the described pulse waveform of scanning lead-in wire output that corresponding sweep trace connects that described shift register is controlled described a plurality of second multiplexer, the control end of described second multiplexer is under the control of described opening signal, and output terminal is exported described pulse waveform.
Alternatively, described scan line drive circuit also comprises the first high level generation unit, the second high level generation unit and low level generation unit, all first multiplexers share the described first high level generation unit and the described second high level generation unit, and all second multiplexers share described low level generation unit.
Alternatively, the voltage of the described first high level generation unit, the generation of the second high level generation unit is adjustable respectively.
Alternatively, the time parameter of described register memory storage is adjustable.
In addition, the present invention also provides a kind of active array display in addition, comprises the scan line drive circuit of the active array display of foregoing description.
Alternatively, described active array display also comprises pel array, with the multi-strip scanning line that is connected with described pel array; Each described sweep trace is positioned at the viewing area, and each scanning lead-in wire is positioned at non-display area.
Alternatively, described active array display is LCD or organic light emitting display.
Compared with prior art, the present invention has the following advantages: at first the multi-strip scanning line of active array display is divided into the S group, every sweep trace connects a scanning lead-in wire, the S-1 bar sweep trace of being separated by between the adjacent scanning lines in every group, and S 〉=2, S is integer; For example the top of display is the 1st sweep trace, is followed successively by ... the S bar S+1 bar along the display downward direction, ... the 2S bar, the 2S+1 bar ... the 3S bar ..., wherein, the 1st, the S+1 bar, the 2S+1 bar ... be first group ..., the S bar, 2S bar, 3S bar, ... be the S group, ..., the 1st sweep trace on the display in every group is: the 1st ..., the S bar, capable pixel of S bar sweep trace correspondence is in fact adjacent altogether for this, and the M bar sweep trace in every group is: (M-1) * S+1 bar ..., the M * S bar, capable pixel of S bar sweep trace correspondence is in fact also adjacent altogether for this; Then the scanning lead-in wire that the multi-strip scanning line of this active array display is connected applies the driving signal line by line, and make in each group the brightness of the capable pixel of M bar sweep trace correspondence be complementary (it is identical to be generally brightness), that is: in fact adjacent (M-1) * S+1 bar, ..., the M * S bar brightness is complementary, in other words, make that the capable pixel display effect of display from the top to the sweep trace correspondence of bottom is even, even the capable pixel region of the sweep trace correspondence of adjacent S bar or S bar multiple and other capable pixel region brightness are variant, but owing to brightness in the zone is complementary, has guaranteed not have the capable pixel of certain bar on the whole and crossed bright or the dark phenomenon of mistake; In addition, this programme is to apply different driving signals by the scanning lead-in wire that sweep trace is connected, and cost is low with respect to raising processing technology of the prior art;
Further, studies show that, the leaping voltage of pixel electrode (kick-back voltage) is closely related with the quality of picture, this programme is in order to make that the brightness of the capable pixel of M bar sweep trace correspondence is complementary (it is identical to be generally brightness) in each group, adopts leaping voltage of the capable pixel of the interior M bar sweep trace correspondence of each group of control be complementary (being generally identical);
Further, make that the method that is complementary the leaping voltage of the capable pixel of M bar sweep trace correspondence in each group (being generally identical) adopt is to regulate the go between pulse waveform of the driving signal that applies of the scanning that M bar sweep trace in each group is connected, the adjusting of this pulse waveform is with respect to the resistance technology of gated sweep lead-in wire, need not spend big hardware cost, and it is can reconcile in various degree according to the resistance sizes situation of producing good scanning lead-in wire and make its display effect coupling, thereby good with existing active array display compatibility;
Further, the described adjusting method that drives the pulse waveform of signal comprises one of them or its combination of following A, B, C method:
A, use stepped pulse waveform;
The pulse height of B, the described pulse waveform of adjusting;
Rise time and/or the fall time of C, the described pulse waveform of change; These three kinds of methods realize that hardware is simple, and pulse waveform output is stable;
Further, in the A method, described stepped pulse waveform comprises first high level and second high level, described first high level is greater than described second high level, duration by increasing described second high level and/or the size that reduces described second high level realize reducing described leaping voltage, realize increasing described leaping voltage by the duration that reduces described second high level and/or the size that increases described second high level;
Further, in the B method, described pulse waveform is the waveform that is formed by single high level, realizes reducing described leaping voltage by the size that reduces described single high level, realizes increasing described leaping voltage by the size that increases described single high level;
Further, described S is even number, because actual its scan drive circuit of display generally is positioned at the non-display area of display bottom, this driving circuit is applied on the sweep trace by the scanning lead-in wire, thereby the 1st sweep trace on the display in every group is: the 1st ..., the S bar, be total to the S bar, display can draw one from top to bottom from the left side, the right is drawn one, and the like; Have more ubiquity ground, the M bar sweep trace in every group: (M-1) * S+1 bar ..., the M * S bar, S bar altogether, corresponding scanning lead-in wire, display can draw one from top to bottom from the left side, and the right is drawn one, and the like;
Further, for M bar in each group, that is: (M-1) * S+1 bar, ..., the M * S bar is total to the actual adjacent sweep trace of S bar, because the resistance difference of the scanning of every sweep trace correspondence lead-in wire, for making the capable pixel intensity of its correspondence be complementary (it is identical to be generally brightness), thereby every added pulse waveform difference of scanning lead-in wire.
Further, each bar sweep trace in same group is because in fact also non-conterminous, thereby corresponding capable pixel need not identically, is to improve the utilization factor that drives signal (or save drive signal generation device), and the pulse waveform of the driving signal of the scanning lead-in wire correspondence that this sweep trace on the same group connects is identical.
Description of drawings
Fig. 1 is the process flow diagram of driving method provided by the invention;
Fig. 2 is the driving method grouping synoptic diagram that present embodiment one provides;
Fig. 3 to Fig. 5 is the synoptic diagram of first kind of control method in the present embodiment one;
Fig. 6 to Fig. 7 is the synoptic diagram of second kind of control method in the present embodiment one;
Fig. 8 is the synoptic diagram of the third control method in the present embodiment one;
Fig. 9 is the structural representation of the driving circuit that provides of embodiment one;
Figure 10 is the structural representation of the shift register among Fig. 9;
Figure 11 is the structural representation of the pulse waveform generation module of first group of correspondence among Fig. 9;
Figure 12 is display every sequential chart that sweep trace is scanned successively from top to bottom;
Figure 13 is the structural representation of the driving circuit that provides of embodiment two.
Embodiment
Just as described in the background art because the restriction of technology and material, make each bar sweep trace the scanning lead-in wire resistance accurately coupling be very difficult, horizontal band is difficult to eliminate well.At the problems referred to above, process flow diagram as shown in Figure 1, the present invention proposes at first execution in step S11, the multi-strip scanning line of active array display is divided into the S group, and every sweep trace connects a scanning lead-in wire, the S-1 bar sweep trace of being separated by between the adjacent scanning lines in every group, S 〉=2, S is integer; For example the top of display is the 1st sweep trace, is followed successively by the 2nd along the display downward direction ..., the S bar, the S+1 bar ..., the 2S bar, the 2S+1 bar ..., the 3S bar ....Wherein, the 1st, the S+1 bar, the 2S+1 bar ... be first group; Article 2,, the S+2 bar, the 2S+2 bar ... be second group; ...; The S bar, the 2S bar, the 3S bar ... be the S group; ....The 1st sweep trace on the display in each group is: the 1st, and the 2nd ..., the S bar; M bar sweep trace in each group is: (M-1) * S+1 bar, and (M-1) * S+2 bar ..., (M-1) * S+S bar ...; M is positive integer.Follow execution in step S12, the scanning lead-in wire that the multi-strip scanning line of this active array display is connected applies the driving signal line by line, and make M bar sweep trace in each group (i.e. (M-1) * S+1 bar, (M-1) * S+2 bar ..., (M-1) * S+S bar, being the adjacent S bar sweep trace of reality) corresponding capable pixel intensity is complementary (it is identical to be generally brightness) M=1,2,3 ....In other words, make that the capable pixel display effect of display from the top to the sweep trace correspondence of bottom is even.
For above-mentioned purpose of the present invention, feature and advantage can be become apparent more, below in conjunction with accompanying drawing the specific embodiment of the present invention is described in detail.Owing to focus on explanation principle of the present invention, so do not draw to scale.
Embodiment one
Present embodiment one is for for the purpose of the interest of clarity, and constituting viewing areas with 8 row pixels is example.
With reference to shown in Figure 1, below introduce the scanning line driving method of the LCD that present embodiment one provides in detail.
At first carry out S11,8 sweep traces of described LCD are divided into 4 groups, every sweep trace connects a scanning lead-in wire, 3 sweep traces of being separated by between the adjacent scanning lines in every group.Herein adjacent do not refer to the actual adjacent of sweep trace, but sweep trace is arrogant to little or arrive adjacent greatly from childhood by its PS label in every group.
With reference to shown in Figure 2, this LCD comprises the non-display area that frame of broken lines interior viewing area 2 and frame of broken lines are outer, 8 sweep trace 201-208 have been horizontally disposed with in the viewing area 20, vertically be provided with many data lines, every data line and sweep trace 201-208 intersection region form a pixel region, and a TFT21 is arranged in each pixel region, and the grid of this TFT21 is connected with sweep trace, source electrode is connected with data line, and drain electrode is connected with pixel electrode.Every capable pixel is formed a capable pixel.In addition, TFT21 opening and closing by the driving signal controlling on the grid, every sweep trace 201-208 is connected with scanning lead-in wire G1-G8 separately, this driving signal is applied directly on the scanning lead-in wire G1-G8, and the signal transmission is through the after-applied grid at TFT of overscanning lead-in wire G1-G8, sweep trace 201-208.
After this step executed, as shown in Figure 2,8 sweep trace 201-208 had been divided into 4 groups, first group: the 1st sweep trace 201 and the 5th sweep trace 205, and in first group the 1st sweep trace 201 and the 5th sweep trace 205 adjacent and 3 sweep traces of being separated by; Second group: the 2nd sweep trace 202 and the 6th sweep trace 206, and in second group the 2nd sweep trace 202 and the 6th sweep trace 206 adjacent and 3 sweep traces of being separated by; The 3rd group: the 3rd sweep trace 203 and the 7th sweep trace 207, and in the 3rd group the 3rd sweep trace 203 and the 7th sweep trace 207 adjacent and 3 sweep traces of being separated by; The 4th group: the 4th sweep trace 204 and the 8th sweep trace 208, and in the 4th group the 4th sweep trace 204 and the 8th sweep trace 208 adjacent and 3 sweep traces of being separated by.These 8 sweep trace 201-208 are 8 capable pixels of corresponding connection respectively.These 8 capable pixels are respectively the 1st from display from the top to the bottom, the 2nd ..., the 8th, accordingly, these 8 sweep trace 201-208 are respectively the 1st 201, the 2 202..., the 8th 208 to the bottom from the top from display.
Then carry out S12, the scanning lead-in wire G1-G8 that 8 sweep trace 201-208 of described LCD are connected applies the driving signal line by line, and makes that the brightness of the capable pixel of M bar sweep trace correspondence is complementary 1≤M≤2 in each group.M herein is 1 or 2.For example, the scanning lead-in wire G1-G8 that 8 sweep trace 201-208 of described LCD are connected applies the driving signal line by line, and makes the brightness of the corresponding capable pixel of the 1st sweep trace 201 (first group the 1st), the 2nd sweep trace 202 (second group the 1st), the 3rd sweep trace 203 (the 3rd group the 1st), the 4th sweep trace 204 (the 4th group the 1st) be complementary (being generally identical).
Being different from passing through of mentioning in the background technology improves processing technology and mates the resistance of the scanning lead-in wire of each sweep trace (make usually the resistance of scanning lead-in wire of each sweep trace identical), this step is to apply different driving signals by the scanning lead-in wire that sweep trace is connected, and realizes many adjacent capable pixel intensity of reality be complementary (being generally identical).In addition, this driving signal can also be regulated according to the scanning lead resistance size of different sweep traces, be after LCD hardware prepares, can correspondingly adjust driving signal, applying flexible and the applied range that is applied to each horizontal scanning line at the difference of the scanning lead resistance of sweep trace.
Studies show that, the leaping voltage (kick-back voltage) that is applied to the voltage on the pixel electrode is closely related with display effect (as horizontal band), thereby the pulse waveform of regulating the driving signal of the scanning lead-in wire that is applied to each horizontal scanning line connection in this step, make the leaping voltage of corresponding each row pixel be complementary (being generally identical), and then realize many adjacent capable pixel intensity of reality be complementary (being generally identical).
In the present embodiment one, article 8, sweep trace 201-208 is divided into four groups, every group of two sweep traces, the 1st sweep trace is in fact adjacent in every group (is respectively the 1st 201, the 2nd 202, article 3,203 and the 4th 204), the 2nd sweep trace in fact adjacent (being respectively the 5th 205, the 6th 206, the 7 207 and the 8th 208) in every group.In order to make the 1st sweep trace 201-204 in actual adjacent every group, the brightness of the capable pixel of the 2nd sweep trace 205-208 correspondence be complementary respectively (being generally identical) in every group, the pulse waveform of the driving signal of the scanning lead-in wire that the 1st sweep trace in adjustment is applied to this every group connects, make corresponding each row pixel (be respectively the 1st row, the 2nd row, the 3rd row and the 4th capable) leaping voltage be complementary (being generally identical), the pulse waveform of the driving signal of the scanning lead-in wire that the 2nd sweep trace in every group connects, make corresponding each row pixel (be respectively the 5th row, the 6th row, the 7th row and eighth row) leaping voltage be complementary (being generally identical).
In specific implementation process, this leaping voltage is complementary and has multiple implementation method.Present embodiment one is realized by the pulse waveform of regulation voltage, and present embodiment one provides the control method of three kinds of pulse waveforms.
First kind: use stepped pulse waveform.
This stepped pulse waveform comprises the first high level VGH1 and the second high level VGH2, and the first high level VGH1 is greater than the described second high level VGH2.As shown in Figure 3, (namely from the display top downward the 1st 201 of the 1st sweep trace in each group, article 2,202, article 3,203, article 4, scanning lead-in wire G1-G4 resistance sizes difference 204), identical scan line driving signal is just different through distortion level behind the different sweep trace lead-in wire G1-G4 of these resistance sizes respectively, and the leaping voltage of corresponding each row pixel (being respectively the 1st row, the 2nd row, the 3rd row and the 4th row) is not complementary.The scanning lead-in wire that resistance is big causes the leaping voltage of corresponding line pixel little, and the scanning lead-in wire that resistance is little causes the leaping voltage of corresponding line pixel big.The scanning of 203, the 4 sweep traces 204 of 202, the 3 sweep traces of 201, the 2 sweep traces of the 1st sweep trace lead-in wire G1-G4 resistance reduces successively among Fig. 3, and the leaping voltage of corresponding line pixel increases successively.For the leaping voltage that makes each row pixel is complementary, can adopt following method: (1) imports stepped pulse waveform to the big scanning lead-in wire of resistance, increases the size of the second high level VGH2, to increase the leaping voltage of the corresponding capable pixel of this scanning lead-in wire; The scanning lead-in wire that resistance is little is imported stepped pulse waveform, reduce the size of the second high level VGH2, to reduce the leaping voltage (as shown in Figure 4) of the corresponding capable pixel of this scanning lead-in wire.(2) the big scanning lead-in wire of resistance is imported stepped pulse waveform, the duration that increases its second high level VGH2 is to increase the leaping voltage of the corresponding capable pixel of this scanning lead-in wire; The scanning lead-in wire that resistance is little is imported stepped pulse waveform, reduce the duration of its second high level VGH2, to reduce the leaping voltage (as shown in Figure 5) of the corresponding capable pixel of this scanning lead-in wire.Employing method (1) (2) makes the leaping voltage of the capable pixel of these 4 sweep trace 201-204 correspondences be complementary (being generally identical).Should (1) (2) two kinds of methods can select a use, also can use simultaneously.1st the sweep trace 201-204 control method interior to the 2nd sweep trace 205-208 control method in each group and each group is identical.
Second kind: the pulse height of pulse waveform regulated.
This pulse waveform is made up of single high level.As shown in Figure 6, (namely from the display top downward the 1st 201 of the 1st sweep trace 201-204 in each group, article 2,202, article 3,203, article 4, scanning lead-in wire G1-G4 resistance sizes difference 204), identical scan line driving signal is just different through distortion level behind the different sweep trace lead-in wire G1-G4 of these resistance sizes respectively, and the leaping voltage of corresponding each row pixel (being respectively the 1st row, the 2nd row, the 3rd row and the 4th row) is not complementary.The scanning lead-in wire that resistance is big causes the leaping voltage of corresponding line pixel little, and the scanning lead-in wire that resistance is little causes the leaping voltage of corresponding line pixel big.The scanning of 203, the 4 sweep traces 204 of 202, the 3 sweep traces of 201, the 2 sweep traces of the 1st sweep trace lead-in wire G1-G4 resistance reduces successively among Fig. 6, and the leaping voltage of corresponding line pixel increases successively.For the leaping voltage that makes each row pixel is complementary, can adopt following method: the scanning lead-in wire input pulse waveform (be generally square wave) big to resistance, increase the size (pulse height) of single high level, to increase the leaping voltage of the corresponding capable pixel of this scanning lead-in wire; To the little scanning of resistance lead-in wire input pulse waveform, reduce the size (pulse height) of single high level, with the leaping voltage (as shown in Figure 7) of the capable pixel that reduces this scanning lead-in wire correspondence.Adopt this method to make the leaping voltage of the capable pixel of these 4 sweep trace correspondences be complementary (being generally identical).Identical with the 1st sweep trace 201-204 control method in every group to the 2nd sweep trace 205-208 control method in every group.
Need to prove that the duration that second method can be considered as the second high level VGH2 in the first method is 0 limiting case.
The third: the rise time and/or the fall time that change pulse waveform.Rise time in this method and/or fall time are to change the moment of waveform rising edge and/or the moment of negative edge.
This pulse waveform also is made up of single high level, but the places different with second method are, this method is the moment by the moment that changes this pulse waveform rising edge and/or negative edge, the leaping voltage of realizing M bar sweep trace in each group be complementary (being generally identical).The scanning of 203, the 4 sweep traces 204 of 202, the 3 sweep traces of 201, the 2 sweep traces of the 1st sweep trace lead-in wire G1-G4 resistance reduces successively among Fig. 8, and the leaping voltage of corresponding line pixel increases successively.For the leaping voltage that makes each row pixel is complementary, can adopt following method: the scanning lead-in wire input pulse waveform (be generally square wave) big to resistance, prolong the negative edge of single high level constantly, to increase the leaping voltage of the corresponding capable pixel of this scanning lead-in wire; The scanning lead-in wire input pulse waveform little to resistance shortens the negative edge of single high level constantly, to reduce the leaping voltage (as shown in Figure 8) of the corresponding capable pixel of this scanning lead-in wire.
These three kinds of methods realize that hardware is simple, and pulse waveform output is stable.
To sum up, because the scanning of every sweep trace 201-208 lead-in wire G1-G8 resistance difference, for making in each group (namely from the display top downward the 1st 201 of the 1st sweep trace 201-204, article 2,202, article 3,203, article 4,204) corresponding capable pixel intensity be complementary (it is identical to be generally brightness), thereby every added pulse waveform difference of scanning lead-in wire G1-G4, (namely from the display top downward the 5th 205 of the 2nd sweep trace 205-208 in each group, article 6,206, article 7,207, the 8 208) corresponding capable pixel intensity is complementary (it is identical to be generally brightness), and every added pulse waveform of scanning lead-in wire G5-G8 is difference also.Yet, each bar sweep trace in same group, article 1,201 and the 5th 205, article 2,202 and the 6th 206, article 3,203 and the 7th 207, article 4,204 and the 8th 208, because it is in fact also non-conterminous, thereby corresponding capable pixel need not identical, for improving the utilization factor (or saving driving signal generator) that drives signal, the pulse waveform of the driving signal that the scanning lead-in wire that this sweep trace on the same group connects is corresponding can be identical, and in other words, the scanning lead-in wire that connects of each sweep trace in shares a driving signal generator on the same group.
Among other embodiment, if all sweep traces are divided into the S group, for M bar in each group, that is: (M-1) * S+1 bar, (M-1) * S+2 bar ..., (M-1) * S+S bar, the actual adjacent sweep trace of S bar altogether, for making the capable pixel intensity of its correspondence be complementary (being generally identical), thereby the scanning of every the sweep trace connection added pulse waveform difference that goes between.Each bar sweep trace in same group is because in fact also non-conterminous, thereby corresponding capable pixel need not identical, drive for improving the utilization factor (or saving driving signal generator) of signal, the pulse waveform of the driving signal that the scanning lead-in wire that this sweep trace on the same group connects is corresponding is identical.
In the present embodiment one, all 8 sweep trace 201-208 are divided into 4 groups, and this group number is even number.Adopt the advantage of even number set number to be: as shown in Figure 2, actual its scan drive circuit of display generally is positioned at the non-display area of display bottom, this driving circuit applies the driving signal by the scanning lead-in wire to main scanning line, thereby, (namely from the display top downward the 1st 201 of the 1st sweep trace 201-204 on the display in every group, article 2,202, article 3,203, article 4,204) corresponding scanning lead-in wire G1-G4, display can satisfy from the left side and draw one from top to bottom, and the right is drawn one, and the like, convenient lead-in wire is arranged.
Among other embodiment, if institute's packet count is S group, the M bar sweep trace in every group then: (M-1) * S+1 bar, (M-1) * S+2 bar ..., (M-1) * S+S bar ...; M is positive integer, is total to the S bar, corresponding scanning lead-in wire, and display can draw one from top to bottom from the left side, and the right is drawn one, and the like, convenient lead-in wire layout.
Corresponding with above-mentioned driving method, present embodiment one also provides a kind of scan line drive circuit of LCD.
Still continue to use aforementioned LCD (as shown in Figure 2) with 8 sweep trace 201-208, these 8 sweep traces are divided into 4 groups, 3 sweep traces of being separated by between the adjacent scanning lines in every group.
As shown in Figure 9, this scan line drive circuit 1 comprises:
4 pulse waveform generation modules 11,12,13,14, the scanning lead-in wire to described 4 groups of sweep trace correspondences provides pulse waveform respectively;
In the present embodiment one, share a pulse waveform generation module 11 with the 1st sweep trace 201, the 5th scanning that sweep trace 205 is connected lead-in wire G1, G5 respectively, share a pulse waveform generation module 12 with the 2nd sweep trace 202, the 6th scanning that sweep trace 206 is connected lead-in wire G2, G6 respectively, share a pulse waveform generation module 13 with the 3rd sweep trace 203, the 7th scanning that sweep trace 207 is connected lead-in wire G3, G7 respectively, share a pulse waveform generation module 14 with the 4th sweep trace 204, the 8th scanning that sweep trace 208 is connected lead-in wire G4, G8 respectively.After this pulse waveform generation module 11,12,13,14 starts, constantly produce pulse waveform, yet whether this pulse waveform is applied on the scanning lead-in wire of corresponding scanning line connection, needs to rely on the control of shift register 15.As shown in figure 10, shift register 15 has a plurality of output terminals, every displacement once, corresponding output terminal is opened, the output terminal output level width that this moment should correspondence is the pulse waveform of H, the pulse waveform of the scanning lead-in wire G1-G8 of this output terminal correspondence could be exported.So, shift register 15 constantly is shifted, and display applies pulse waveform to the scanning lead-in wire G1-G8 that each bar sweep trace 201-208 connects from top to bottom.Need to prove that in other embodiments, the output terminal number of this bit register 15 can stay standby output port greater than the bar number of sweep trace, with the multiple situation of compatibility.
Below introduce pulse waveform generation module 11,12,13,14 composition.With reference to shown in Figure 11, be example with the pulse waveform generation module 11 of first group of sweep trace 201,205 correspondences, this pulse waveform generation module 11 comprises:
First multiplexer 114 (multiplexer), have two input ends that connect the first high level VGH1 and the second high level VGH2 respectively, the control end that links to each other with output terminal with comparer 113, first multiplexer 114 are to repeat to export the pulse waveform that first high level and second high level form the cycle with H according to the comparative result of comparer 113 outputs;
A plurality of second multiplexers 115 (among the figure are 2, correspondence scans lead-in wire G1 and G5 respectively), each second multiplexer 115 has another input end of the output terminal that connects low level VGL input end and described first multiplexer 114 respectively, scannings lead-in wire G1, the G5 output that the control end that links to each other with corresponding output end with shift register 15, a plurality of second multiplexers 115 connect to corresponding sweep trace 201,205 under the control of shift register 15 comprises the pulse waveform of the first high level VGH1 and the second high level VGH2.
The first high level VGH1 input end of present embodiment one, the first multiplexer 114 (multiplexer) links to each other with the first high level VGH1 generation unit 13, the second high level VGH2 generation unit 14 respectively with the second high level VGH2 input end.The low level VGL input end of second multiplexer 115 links to each other with low level VGL generation unit 16.
In the present embodiment one, this second multiplexer 115 equates that with the bar number of sweep trace in every group namely every sweep trace connects second multiplexer 115.Among other embodiment, for making that this driving circuit 1 can compatible multiple operating position, can stay several standby sweep trace connectors, namely the number of second multiplexer 115 in every group is more than the bar number of the sweep trace in every group more.
In each cycle H, timer 111 time parameters continuous and register 112 interior storages compare, for example between 11 timing of timer greater than the storage time parameter the time, comparative result is expressed as " 1 ", and pass to the control end of first multiplexer 114, control the output terminal of this first multiplexer 114 and export the first high level VGH1, if when being not more than the time parameter of storage between 11 timing of timer, comparative result is expressed as " 0 ", and pass to the control end of first multiplexer 114, control the output terminal of this first multiplexer 114 and export the second high level VGH2.In the time of can certainly setting between 11 timing of timer the time parameter greater than storage as required, " 0 " is passed to the control end of first multiplexer 114, control the output terminal of this first multiplexer 114 and export the second high level VGH2; When being not more than, " 1 " is passed to the control end of first multiplexer 114, control the output terminal of this first multiplexer 114 and export the first high level VGH1; Or time and the correspondence greater than storage exported the first high level VGH1 between 11 timing of setting " 0 " expression timer, sets the time and the correspondence that are not more than storage between 11 timing of " 1 " expression timer and exports the second high level VGH2.
In the present embodiment one, be H the time-count cycle of this timer 111, and automatic clear when namely timing reaches H begins next cycle timing.In addition, this time-count cycle is also identical with 15 every displacement cycles once of shift register, in other words, this shift register 15 after the complete output of pulse waveform of a sweep trace of one-period H inner control, timer 111 zero clearings.
The first species stage shape pulse waveform control method for foregoing description, in the register 112 time parameters of storage between 0 and H between, thereby, in one-period, the pulse waveform that first multiplexer, the 114 output first high level VGH1 and the second high level VGH2 form, along with timer 111 continuous timing, the time parameters of storage in the value of comparer 113 continuous relatively these timers and the register 112, first multiplexer 114 are the first high level VGH1 of H and the pulse waveform that the second high level VGH2 forms according to " 0 " or " 1 " the output cycles of comparer 113 constantly.
Method for the pulse height of second kind of pulse waveform regulated of foregoing description, the time parameter of storage is less than 0 or greater than H in the register 112, thereby in one-period, the single pulse waveform that first multiplexer, the 114 output first high level VGH1 or the second high level VGH2 form, along with timer 111 continuous timing, the time parameters of storage in the value of comparer 113 continuous relatively these timers and the register 112, first multiplexer 114 are the single pulse waveform of H according to comparative result (" 0 " or " 1 ") the output cycles of comparer 113 constantly.
Be example with first kind of control method, display shown in Figure 12 is the sequential chart of the scanning of each bar sweep trace 201-208 from top to bottom, the driving signal of first multiplexer of every sweep trace 201-208 correspondence is exported continuously, in shift register 15 continuous shifting processes, the pulse waveform of the scanning lead-in wire G1-G8 that the output terminal corresponding scanning line 201-208 that chooses connects just is output.
Wherein, for stepped pulse waveform control method, according to the situation of different scanning line, the duration of the first high level VGH1, the second high level VGH2 needs respectively to regulate, thereby the time parameter of storage needs adjustable in the register 112.In addition, the second high level VGH2 size needs to regulate, thereby the high level that the second high level VGH2 generation unit 14 produces needs to regulate.
Method for the pulse height of pulse waveform regulated, situation according to the different scanning line, the size of the first high level VGH1 or the second high level VGH2 needs to regulate, thereby the high level that the high level that the first high level VGH1 generation unit 13 produces or the second high level VGH2 generation unit 14 produce needs to regulate.
Described above is the pulse waveform generation module 11 that first group of sweep trace links to each other, the pulse waveform generation module 12,13 that other group sweep trace links to each other, 14 with first group to retouch the pulse waveform generation module 11 that line links to each other roughly the same.Not on the same group between, the first high level VGH1, the second high level VGH2, low level VGL can be identical, in such cases, all first multiplexers can share the described first high level VGH1 generation unit 13 and the described second high level VGH2 generation unit 14, and all second multiplexers can share described low level generation unit 16.Under the first high level VGH1, the second high level VGH2 between on the same group, the low level VGL situation inequality, first high level that connects does not separately separately produce VGH1 unit 13, the second high level VGH2 generation unit 14, low level VGL generation unit 16.
In addition, the resistance situation of the scanning lead-in wire that connects according to the sweep trace of each group between on the same group not, the numerical value of depositing in the register 112 can be different.
Driving circuit 1 and the LCD of foregoing description are respectively independently element.
Be example with the LCD among the above embodiment one, driving circuit in the present embodiment one and driving method can use in all active array displays, as scan line drive circuit and the driving method of active array display, this active array display for example can also be organic light emitting display.
Based on this, present embodiment one also provides a kind of active array display in addition, comprises the scan line drive circuit of the active array display of foregoing description.In other words, this driving circuit is an element in the LCD.
Particularly, this active array display also comprises pel array, with the multi-strip scanning line that is connected with described pel array; Each described sweep trace is positioned at the viewing area, and each scanning lead-in wire is positioned at non-display area.
Embodiment two
What describe among the embodiment one is the divided evenly situation of sweep trace 201-208 of display, more at large, existing LCD 1024 * 768 pixels, horizontal scanning line is 1024, if be divided into 10 groups, situation then can occur not dividing exactly.
At above-mentioned situation, still constituting the viewing area with 8 row pixels shown in Figure 2 is example, corresponding 1 sweep trace of every capable pixel, and display is from top to bottom, is respectively the 1st 201, the 2 202 ... the 8th 208.
At first carry out S11 ', 8 sweep trace 201-208 of described LCD are divided into 3 groups, 2 sweep traces of being separated by between the adjacent scanning lines in every group.Adjacent explanation of still continuing to use embodiment one herein.
After this step executed, as shown in figure 13,8 sweep trace 201-208 had been divided into 3 groups, first group: the 1st 201, the 4th 204 and the 7th 207; Second group: the 2nd 202, the 5th 205 and the 8th 208; The 3rd group: the 3rd 203 and the 6th 206.
Then carry out S12 ', the scanning lead-in wire G1-G8 that 8 sweep trace 201-208 of described LCD are connected applies the driving signal line by line, and makes that the brightness of the capable pixel of M bar sweep trace correspondence is complementary (being generally identical) 1≤M≤3 in each group.M herein is 1 or 2 or 3.
In the present embodiment two, the 1st sweep trace in every group: the 1st 201, the 2nd 202 in fact adjacent with the 3rd 203 corresponding capable pixels, the 2nd sweep trace in every group: the 4th 204, the 5th 205 in fact adjacent with the 6th 206 corresponding capable pixels, and the 3rd sweep trace in every group: the capable pixel of the 7th 207, the 8th 208 correspondences is in fact adjacent.In the present embodiment two for the capable pixel intensity of the M bar sweep trace correspondence in every group adjacent in the reality is complementary (being generally identical), the leaping voltage that control is applied to the M bar sweep trace in this every group be complementary (being generally identical).This leaping voltage is identical to be realized by pulse waveform regulated, and the pulse waveform regulative mode is identical with embodiment one.
To sum up, because the resistance difference of every scanning lead-in wire G1-G8, for making in each group the 1st sweep trace (sweep trace 201 the 1st, article 2, sweep trace 202, article 3, sweep trace 203) corresponding capable pixel intensity is complementary (being generally identical), thereby the scanning of every the sweep trace connection added pulse waveform difference that goes between; For making that the corresponding capable pixel intensity of the 2nd sweep trace (the 4th 205, the 6 sweep traces 206 of 204, the 5 sweep traces of sweep trace) is complementary (being generally identical) in each group, the scanning that every sweep trace connects the also difference of added pulse waveform that goes between; For making that the corresponding capable pixel intensity of the 3rd sweep trace (the 7th 207, the 8 sweep traces 208 of sweep trace) is complementary (being generally identical) in each group, the scanning that every sweep trace connects the also difference of added pulse waveform that goes between.Yet, each bar sweep trace in same group, article 1, sweep trace 201, article 4, sweep trace 204 and the 7th sweep trace 207, article 2, sweep trace 202, article 5, sweep trace 205 and the 8th sweep trace 208, article 3, sweep trace 203 and the 6th sweep trace 206, because it is in fact also non-conterminous, thereby corresponding capable pixel need not identical, for improving the utilization factor (or saving driving signal generator) that drives signal, the pulse waveform of the driving signal that the scanning lead-in wire that this sweep trace on the same group connects is corresponding can be identical, in other words, the scanning lead-in wire that connects of each sweep trace on the same group shares one and drives signal.
Among other embodiment, if be divided into the S group, for M bar in each group, that is: (M-1) * S+1 bar, (M-1) * S+2 bar ..., S bar or less than the actual adjacent sweep trace of S bar altogether, for making the capable pixel intensity of its correspondence be complementary (being generally identical), thereby the scanning that connects of every sweep trace added pulse waveform difference that goes between.Each bar sweep trace in same group is because in fact also non-conterminous, thereby corresponding capable pixel need not identical, drive for improving the utilization factor (or saving driving signal generator) of signal, the pulse waveform of the driving signal that the scanning lead-in wire that this sweep trace on the same group connects is corresponding is identical.
For the non-situation of describing in the present embodiment two about dividing exactly, similar among its scan line drive circuit and the embodiment one.
As shown in figure 13, this scan line drive circuit 2 comprises:
3 pulse waveform generation modules 31,32,33 provide pulse waveform to the scanning lead-in wire that described 3 groups of sweep traces connect respectively;
In the present embodiment two, share a pulse waveform generation module 31 with the 1st sweep trace 201, the 4th sweep trace 204, the 7th scanning that sweep trace 207 is connected lead-in wire G1, G4, G7 respectively, share a pulse waveform generation module 32 with the 2nd sweep trace 202, the 5th sweep trace 205, the 8th scanning that sweep trace 208 is connected lead-in wire G2, G5, G8 respectively, share a pulse waveform generation module 33 with the 3rd sweep trace 203, the 6th scanning that sweep trace 206 is connected lead-in wire G3, G6 respectively.Identical with embodiment one, after this pulse waveform generation module 31,32,33 starts, constantly produce pulse waveform, yet whether this pulse waveform is applied on the scanning lead-in wire of corresponding scanning line connection, needs to rely on the control of shift register 15.The structure of this shift register 15 and function, each pulse waveform generation module 31,32,33 structure and function are all identical with embodiment one.
The above only is preferred embodiment of the present invention, is not the present invention is done any pro forma restriction.Any those of ordinary skill in the art are not breaking away under the technical solution of the present invention scope situation, all can utilize the technology contents of above-mentioned announcement that technical solution of the present invention is made many possible changes and modification, or be revised as the equivalent embodiment of equivalent variations.Therefore, every content that does not break away from technical solution of the present invention according to any simple modification, equivalent variations and the modification that technical spirit of the present invention is done above embodiment, all still belongs in the scope of technical solution of the present invention protection.
Claims (22)
1. the scanning line driving method of an active array display is characterized in that, comprising:
The multi-strip scanning line of described active array display is divided into the S group, and every sweep trace connects a scanning lead-in wire, the S-1 bar sweep trace of being separated by between the adjacent scanning lines in every group, and S 〉=2, S is integer;
The scanning lead-in wire that the multi-strip scanning line of described active array display is connected applies the driving signal line by line, and makes that the brightness of the capable pixel of M bar sweep trace correspondence is complementary in each group, and M is positive integer.
2. the scanning line driving method of active array display according to claim 1, it is characterized in that the method that makes the brightness of the capable pixel of M bar sweep trace correspondence in each group be complementary to adopt is the realization that is complementary of the leaping voltage by the capable pixel of M bar sweep trace correspondence in each group of control.
3. the scanning line driving method of active array display according to claim 2, it is characterized in that the method that makes the leaping voltage of the capable pixel of M bar sweep trace correspondence in each group be complementary to adopt is to regulate the go between pulse waveform of the driving signal that applies of the scanning that M bar sweep trace in each group is connected.
4. the scanning line driving method of active array display according to claim 3 is characterized in that, the method that described adjusting drives the pulse waveform of signal comprises one of them or its combination of following A, B, C method:
A, use stepped pulse waveform;
The pulse height of B, the described pulse waveform of adjusting;
Rise time and/or the fall time of C, the described pulse waveform of change.
5. the scanning line driving method of active array display according to claim 4 is characterized in that, described stepped pulse waveform comprises first high level and second high level, and described first high level is greater than described second high level.
6. the scanning line driving method of active array display according to claim 5, it is characterized in that, during the stepped pulse waveform of described use, duration by increasing described second high level and/or the size that reduces described second high level realize reducing described leaping voltage, realize increasing described leaping voltage by the duration that reduces described second high level and/or the size that increases described second high level.
7. the scanning line driving method of active array display according to claim 4 is characterized in that, described pulse waveform is the waveform that is formed by single high level.
8. the scanning line driving method of active array display according to claim 7, it is characterized in that, during pulse waveform that described use is formed by single high level, realize reducing described leaping voltage by the size that reduces described single high level, realize increasing described leaping voltage by the size that increases described single high level.
9. the scanning line driving method of active array display according to claim 1 is characterized in that, the group that the bar number of described sweep trace is divided exactly branch is counted S.
10. the scanning line driving method of active array display according to claim 1 is characterized in that, described S is even number.
11. the scanning line driving method of active array display according to claim 3 is characterized in that, the pulse waveform difference of the driving signal that the scanning lead-in wire that M bar sweep trace connects in each group is corresponding.
12. the scanning line driving method of active array display according to claim 11 is characterized in that, the pulse waveform of the driving signal that the scanning lead-in wire that each bar sweep trace connects in same group is corresponding is identical.
13. the scan line drive circuit of an active array display is characterized in that,
Described active array display comprises the multi-strip scanning line, and every sweep trace connects a scanning lead-in wire, and described multi-strip scanning line is divided into the S group, the S-1 bar sweep trace of being separated by between the adjacent scanning lines in every group, and S 〉=2, S is integer;
Described scan line drive circuit comprises:
S pulse waveform generation module, the scanning lead-in wire that connects to described S group sweep trace provides pulse waveform respectively;
Shift register is used for described S pulse waveform generation module of control and exports described pulse waveform line by line to the scanning lead-in wire of the multi-strip scanning line connection of described active array display.
14. the scan line drive circuit of active array display according to claim 13 is characterized in that, each described pulse waveform generation module comprises:
Timer, be H its time-count cycle;
Register is used for parameter storage time;
Comparer, between described timer clocked and described time parameter make comparisons the output comparative result;
First multiplexer, have two input ends that connect first high level and second high level respectively, with the control end that links to each other with described comparator output terminal, described first multiplexer is the pulse waveform that repeats to export first high level and the formation of second high level cycle with H according to the comparative result of described comparer output;
A plurality of second multiplexers, each described second multiplexer has two input ends that connect low level and the described first multiplexer output terminal respectively, with the control end that links to each other with the corresponding output end of described shift register, the scanning lead-in wire output that described a plurality of second multiplexers connect to corresponding sweep trace under the control of described shift register comprises the pulse waveform of first high level and second high level.
15. the scan line drive circuit of active array display according to claim 14 is characterized in that, the number of scanning lines in the scanline groups that the number of second multiplexer equals to be attached thereto in the described pulse waveform generation module.
16. the scan line drive circuit of active array display according to claim 14, it is characterized in that, it is to export opening signal by the corresponding output terminal that makes described shift register to the described pulse waveform of scanning lead-in wire output that corresponding sweep trace connects that described shift register is controlled described a plurality of second multiplexer, the control end of described second multiplexer is under the control of described opening signal, and output terminal is exported described pulse waveform.
17. the scan line drive circuit of active array display according to claim 14, it is characterized in that, described scan line drive circuit also comprises the first high level generation unit, the second high level generation unit and low level generation unit, all first multiplexers share the described first high level generation unit and the described second high level generation unit, and all second multiplexers share described low level generation unit.
18. the scan line drive circuit of active array display according to claim 17 is characterized in that, the voltage that the described first high level generation unit, the second high level generation unit produce is adjustable respectively.
19. the scan line drive circuit of active array display according to claim 14 is characterized in that, the time parameter of described register memory storage is adjustable.
20. an active array display is characterized in that, comprises the scan line drive circuit of any described active array display among the claim 13-19.
21. active array display according to claim 20 is characterized in that, described active array display also comprises pel array, with the multi-strip scanning line that is connected with described pel array; Each described sweep trace is positioned at the viewing area, and each scanning lead-in wire is positioned at non-display area.
22. active array display according to claim 21 is characterized in that, described active array display is LCD or organic light emitting display.
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