CN101840682A - Column pulse dual-side driving method for smectic liquid crystal display screen - Google Patents
Column pulse dual-side driving method for smectic liquid crystal display screen Download PDFInfo
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Abstract
The invention discloses a column pulse dual-side driving method for a smectic liquid crystal display screen, comprising the following steps: 1) initializing a smectic liquid crystal display screen; and 2) respectively carrying out row-column driving on the top half screen and the bottom half screen according to the respective set scanning driving way, thereby leading the top half screen and the bottom half screen to display the respective images; simultaneously respectively carrying out scanning driving on one row electrode of the top half screen and one row electrode of the bottom half screen during the row-column driving process of the top half screen and the bottom half screen; respectively applying the corresponding column pulse to each column electrode on the top half screen according to the image displayed by the row which corresponds to the row electrode while carrying out the scanning driving on one row electrode on the top half screen; and respectively applying the corresponding column pulse to each column electrode on the lower half screen according to the image displayed by the row which corresponds to the row electrode while carrying out the scanning driving on one row electrode on the lower half screen. The adoption of the column pulse dual-side driving method for the smectic liquid crystal display screen can improve the image refresh rate, and the display screen structure and the method are particularly suitable for the high-definition image display.
Description
Technical field
The present invention relates to a kind of driving method of display screen, refer to a kind of column pulse dual-side driving method that is applied to smectic liquid crystal display screen especially.
Background technology
LCD is one of at present the most promising flat-panel display device, traditional LCD all is passive demonstration, and promptly transmission-type shows, only just can show adding under the condition of backlight, but the power consumption of backlight is more than the hundred times of the power consumption of liquid crystal own, very power consumption.Along with the development of liquid crystal technology, various liquid crystal materials emerge in an endless stream, and wherein do not need the reflective liquid crystal of backlight to rely on its low-power consumption characteristic to have absolute predominance.A kind of just reflective liquid crystal that adopted of smectic liquid crystal display screen---the reflection display device that need not backlight that the smectic phase liquid crystal is made in China's utility model patent " a kind of display control circuit " (patent No. is ZL200720190955.3).Smectic liquid crystal display screen is with its distinctive film surface characteristic and reflection-type displaying principle, realized a kind of need not backlight, simple in structure, the visual angle is extensive, picture is steady, the display device of real safety and environmental protection, power saving, and it has advantages such as long-term memory function and user's indefatigability, maintains the leading position in the ranks of display.
What existing smectic liquid crystal display screen adopted is the monolateral driving method of row pulse, is about to same one side that full frame all row electrodes lead to display screen, is provided for providing the row pulse driving circuit of row pulse on this limit.But, in order to satisfy the raising of people to the image display requirement, the resolution of display screen is improved constantly, corresponding image data amount also increases thereupon, and all row pulses all must provide from monolateral row pulse driving circuit, need the row pulse driving circuit that one group of row pulse is provided whenever scanning a provisional capital, therefore, for high-resolution smectic liquid crystal display screen, the time that needs when using the monolateral driving method of row pulse to refresh high-definition picture can increase considerably.
Summary of the invention
The object of the present invention is to provide a kind of column pulse dual-side driving method for smectic liquid crystal display screen, this column pulse dual-side driving method has improved the image refreshing speed of smectic liquid crystal display screen.
In order to achieve the above object, the present invention has adopted following technical scheme:
A kind of column pulse dual-side driving method for smectic liquid crystal display screen, this smectic liquid crystal display screen comprises first base layer and second base layer, between first base layer and second base layer, be provided with the mixolimnion that forms by smectic phase liquid crystal and additives mixed, this smectic phase liquid crystal is a category-A smectic phase liquid crystal organic compound, this additive is the compound of band conductive characteristic, be provided with first conductive electrode layer at first base layer towards a side of mixolimnion, be provided with second conductive electrode layer at second base layer towards a side of mixolimnion, first conductive electrode layer is by the first column electrode unit, the second column electrode unit is formed, first, the second column electrode unit is formed by M strip line electrode that is arranged in parallel, second conductive electrode layer is by the first row electrode unit, the secondary series electrode unit is formed, first, the secondary series electrode unit is formed by N strip row electrode that is arranged in parallel, N row electrode of the M of first a column electrode unit column electrode and the first row electrode unit is perpendicular, this the first column electrode unit and the first row electrode unit form the first pixel array of a M * N, this first pixel array and pairing first base layer of this first pixel array, second base layer, mixolimnion constitutes goes up half screen, N row electrode of the M of second a column electrode unit column electrode and secondary series electrode unit is perpendicular, this second column electrode unit and secondary series electrode unit form the second pixel array of a M * N, this second pixel array and pairing first base layer of this second pixel array, second base layer, mixolimnion constitutes half screen down, and it is characterized in that: this method may further comprise the steps:
The initialization smectic liquid crystal display screen is with the piclear of smectic liquid crystal display screen demonstration;
Last half screen, following half screen drive according to the turntable driving mode procession of setting separately respectively, thereby half screen on this, following half screen are shown image separately respectively, wherein:, respectively a column electrode in the second pixel array of column electrode in the first pixel array of half screen on this and this time half screen is carried out turntable driving at synchronization to half screen on this, in the half screen procession drives down the process; Last half screen is in the column electrode of turntable driving on it, and according to the row image to display of this column electrode correspondence on the last half screen, each row electrode on the last half screen applies the respective column pulse respectively; Following half screen is in the column electrode of turntable driving on it, and according to the row image to display of this column electrode correspondence on the half screen down, each row electrode on the following half screen applies the respective column pulse respectively.
Row distance between electrodes in the first pixel array of described upward half screen is greater than 4 μ m and less than 10 μ m, and the row distance between electrodes in the second pixel array of described half screen down is greater than 4 μ m and less than 10 μ m.
The turntable driving mode that turntable driving mode that described upward half screen is adopted and described half screen are down adopted is identical or different.
Describedly go up turntable driving mode that half screen adopted and be sequential scanning type of drive line by line, fractional scanning type of drive, two fens algorithm turntable driving modes, any in the out of order turntable driving mode at random, the turntable driving mode that described half screen is down adopted is sequential scanning type of drive line by line, fractional scanning type of drive, two fens algorithm turntable driving modes, any in the out of order turntable driving mode at random.
When described when going up turntable driving mode that half screen and described half screen down adopted and being line by line the sequential scanning type of drive, the described half screen of going up walks to from the 1st that M is capable to carry out line by line that sequential scanning drives, described half screen down walks to the 1st row from M and carries out sequential scanning driving line by line, perhaps, the described half screen of going up walks to the 1st row from M and carries out line by line that sequential scanning drives, and described half screen down walks to from the 1st that M is capable to carry out line by line that sequential scanning drives.
Advantage of the present invention is: the smectic liquid crystal display screen among the present invention has upper and lower half screen, upper and lower half screen is to carry out image simultaneously to show, thereby, show that with a monoblock display screen entire image compares, the speed that adopts the inventive method to carry out image refreshing is improved significantly, and the display screen structure among the present invention and the inventive method are specially adapted to the demonstration of high-definition picture.When the upper and lower half screen in the inventive method adopts fractional scanning type of drive, two fens algorithm turntable driving modes or out of order at random turntable driving mode, compare with sequential scanning type of drive line by line, fractional scanning type of drive, two fens algorithm turntable driving modes, the interference to image that sequential scanning type of drive line by line can be produced of out of order turntable driving mode evenly spread to half screen at random, and can be in the accumulation of same zone, avoided the image fault phenomenon, effectively improve the homogeneity that image shows, promoted the image display effect of smectic liquid crystal display screen.
Description of drawings
Fig. 1 is the composition synoptic diagram of smectic liquid crystal display screen;
Fig. 2 is arranged in anyhow that first and second pixel-matrixs of lattice array shape list intention;
Fig. 3 A is the exemplary plot of low-frequency high-voltage positive negative pulse stuffing;
Fig. 3 B is the exemplary plot of high-frequency and high-voltage positive negative pulse stuffing;
Fig. 4 is realization flow figure of the present invention;
Fig. 5 is the out of order arrangement form synoptic diagram of smectic phase liquid crystal molecule;
Fig. 6 is the regularly arranged form synoptic diagram of smectic phase liquid crystal molecule.
Embodiment
Describe the present invention below in conjunction with accompanying drawing.
Column pulse dual-side driving method of the present invention designs at following smectic liquid crystal display screen.As depicted in figs. 1 and 2, this smectic liquid crystal display screen 1 comprises that the material of first base layer 11 and second base layer, 12, the first base layers 11 and second base layer 12 is chosen as glass or plastics.Between first base layer 11 and second base layer 12, be provided with the mixolimnion 13 that forms by smectic phase liquid crystal and additives mixed, promptly mix with additive molecule 1 32 by the smectic phase liquid crystal molecule 131 shown in Fig. 5.This smectic phase liquid crystal is category-A smectic phase liquid crystal (Smectic-A) organic compound, as with silica-based compound, four cyano four octyl group biphenyl, tetraacethyl ester in last of the ten Heavenly stems four cyano biphenyl etc.This additive is the compound of band conductive characteristic, contains the compound of conductive ion as cetyltriethylammonium bromide etc.Be coated with first conductive electrode layer 14 at first base layer 11 towards a side of mixolimnion 13, be coated with second conductive electrode layer 15 at second base layer 12 towards a side of mixolimnion 13, as shown in Figure 2, first conductive electrode layer 14 is by the first column electrode unit 141, the second column electrode unit 142 is formed, the first column electrode unit 141 is made up of M strip line electrode 1411 that is arranged in parallel, the second column electrode unit 142 is made up of M strip line electrode 1421 that is arranged in parallel, in this application, a column electrode is counted as delegation, second conductive electrode layer 15 is by the first row electrode unit 151, secondary series electrode unit 152 is formed, the first row electrode unit 151 is made up of N strip row electrode 1511 that is arranged in parallel, secondary series electrode unit 152 is made up of N strip row electrode 1521 that is arranged in parallel, in this application, a row electrode is counted as row, N row electrode 1511 of the M of the first column electrode unit 141 column electrode 1411 and the first row electrode unit 151 is perpendicular, this the first column electrode unit 141 and the first row electrode unit 151 form the first pixel array of a M * N, a column electrode 1411 and a row electrode 1511 form a pixel, pixel 2 for example shown in Figure 2, this first pixel array and pairing first base layer 11 of this first pixel array, second base layer 12, mixolimnion 13 constitutes goes up half screen, the M of the second column electrode unit 142 column electrode 1421 is perpendicular with N row electrode 1521 of secondary series electrode unit 152, this second column electrode unit 142 and secondary series electrode unit 152 form the second pixel array of a M * N, this second pixel array and pairing first base layer 11 of this second pixel array, second base layer 12, mixolimnion 13 constitutes half screen down.That is to say, display screen 1 be 2M capable * N row standard, upper and lower half screen has respectively that M is capable, the N row, delegation is to there being N pixel, promptly there are N data in delegation.These two conductive electrode layers 14 and 15 and middle mixolimnion 13 formed a capacitance structure that area is very big.First conductive electrode layer 14 and second conductive electrode layer 15 are transparent, and it can be ITO (tin indium oxide) etc., and can use auxiliary metal electrode as required, as aluminium, copper, silver etc.During actual design, the row distance between electrodes in the first pixel array of last half screen is greater than 4 μ m and less than 10 μ m, and the row distance between electrodes in the second pixel array of following half screen is greater than 4 μ m and less than 10 μ m.
Upper and lower half screen is equipped with first, second video memory respectively, and the data of upper and lower half screen image to be displayed are stored in first, second video memory with the behavior unit sequence respectively, and each data is furnished with an address.More than, down half screen to be 400 row * 600 row standards be example.Totally 400 * 600 of the data of last half screen image to be displayed are stored in first video memory with the behavior unit sequence, and each data is furnished with an address.For example, the the 1st to 600 data are that last half screen the 1st row is wanted data presented in first video memory, the data that are called the 1st row, be when showing the 1st row image, the 1st row and pairing 600 data of 600 row, the 601st to 1200 data are that last half screen the 2nd row is wanted data presented in first video memory, are called the data of the 2nd row, be when showing the 2nd row image the 2nd row and pairing 600 data of 600 row.
As shown in Figure 4, the inventive method may further comprise the steps:
Initialization smectic liquid crystal display screen 1, with the piclear that smectic liquid crystal display screen 1 shows, promptly upper and lower half screen carries out cls simultaneously; Last half screen, following half screen drive according to the turntable driving mode procession of setting separately respectively, thereby half screen on this, following half screen are shown image separately respectively, wherein: in the process to half screen, half screen procession driving down on this, respectively the column electrode 1421 in the second pixel array of a column electrode in the first pixel array of half screen on this 1411 and this time half screen is carried out turntable driving at synchronization; Last half screen is in the column electrode 1411 of turntable driving on it, and according to the row image to display of these column electrode 1411 correspondences on the last half screen, each row electrode 1511 on the last half screen applies the respective column pulse respectively; Following half screen is in the column electrode 1421 of turntable driving on it, and according to the row image to display of these column electrode 1421 correspondences on the half screen down, each row electrode 1521 on the following half screen applies the respective column pulse respectively.
When reality is carried out the invention described above method, the turntable driving mode that last half screen adopted can be sequential scanning type of drive line by line, fractional scanning type of drive, two fens algorithm turntable driving modes, any in the out of order turntable driving mode at random, and the following turntable driving mode that half screen adopted can be sequential scanning type of drive line by line, fractional scanning type of drive, two fens algorithm turntable driving modes, any in the out of order turntable driving mode at random.The turntable driving mode that last half screen adopted can be identical with the following turntable driving mode that half screen adopted, also can be different.
When last half screen and the following turntable driving mode that half screen adopted are line by line the sequential scanning type of drive, last half screen can walk to the capable sequential scanning that carries out line by line of M from the 1st and drive, carry out sequential scanning driving line by line and descend half screen to walk to the 1st row from M, perhaps, last half screen can walk to the 1st row from M to carry out line by line sequential scanning and drives, and half screen walks to from the 1st that M is capable to carry out line by line that sequential scanning drives down.
That is to say, though the turntable driving mode of upper and lower half screen is similar and different, but at synchronization, the image demonstration of certain delegation of last half screen and certain delegation of following half screen is carried out simultaneously, the used image demonstration time of upper and lower half screen is the same, guaranteed that so upper and lower half screen shows image separately simultaneously, thereby on sometime, the image that upper and lower half screen is shown respectively can come out with a complete picture showing.
Below above half screen adopt the fractional scanning type of drive to specify the fractional scanning type of drive, the fractional scanning type of drive comprises step: read from the ordered series of numbers storer and the corresponding scanning sequence series of this fractional scanning type of drive, this scanning sequence series number is made up of integer 1 to M, a M row, be divided into many groups capable number 1 to M, should many groups setting series arrangement, the row in this scanning sequence series number is to set the tactic corresponding arrangements of order that should many groups; From this scanning sequence series, read each successively capable number; When reading delegation number, from first video memory, read this row number pairing data that go up the delegation in the half screen, on the pairing column electrode 1411 of this row, export corresponding pulses, and on this on each row electrode 1511 of half screen according to the data output respective column pulse of this row that reads; When having read this scanning sequence series, the column electrode 1411 and the row electrode 1511 of half screen on this stopped to export pulse, the image of last half screen does not just show.
Below above half screen adopt two fens algorithm turntable driving modes to specify two fens algorithm turntable driving modes, algorithm turntable driving mode comprised step in two minutes: read from the ordered series of numbers storer and this two fens corresponding scanning sequence series of algorithm turntable driving mode, this scanning sequence series number is made up of integer 1 to M, a M row, and the row in this scanning sequence series number is arranged according to the order that two fens algorithms in the numerical algorithm obtain; From this scanning sequence series, read each successively capable number; When reading delegation number, from first video memory, read this row number pairing data that go up the delegation in the half screen, on the pairing column electrode 1411 of this row, export corresponding pulses, and on this on each row electrode 1511 of half screen according to the data output respective column pulse of this row that reads; When having read this scanning sequence series, the column electrode 1411 and the row electrode 1511 of half screen on this stopped to export pulse, the image of last half screen just shows.
Below above half screen adopt out of order at random turntable driving mode to specify out of order at random turntable driving mode, out of order at random turntable driving mode comprises step: read from the ordered series of numbers storer and the corresponding scanning sequence series of this out of order at random turntable driving mode, this scanning sequence series number is made up of integer 1 to M, a M row, and the row in this scanning sequence series number is arranged by the random sequence that random algorithm obtains; From this scanning sequence series, read each successively capable number; When reading delegation number, from first video memory, read this row number pairing data that go up the delegation in the half screen, on the pairing column electrode 1411 of this row, export corresponding pulses, and on this on each row electrode 1511 of half screen according to the data output respective column pulse of this row that reads; When having read this scanning sequence series, the column electrode 1411 and the row electrode 1511 of half screen on this stopped to export pulse, the image of last half screen just shows.
In this application, first, second video memory, ordered series of numbers storer are prior art, here are not elaborated.
In actual the enforcement, for sequential scanning type of drive line by line, fractional scanning type of drive, two fens algorithm turntable driving modes and out of order at random turntable driving mode, above half screen is an example, and the concrete steps of output corresponding pulses are as follows on each row electrode of column electrode of last half screen and last half screen.Following half screen in like manner.
In a Preset Time, on a column electrode 1411 of last half screen, load the high-frequency and high-voltage positive negative pulse stuffing, on remaining row electrode 1411, load 0V voltage, simultaneously, on each row electrode 1511 of last half screen, load the respective column driving pulse, wherein: the high-frequency and high-voltage positive negative pulse stuffing frequency that need be driven to loading on the row driving pulse that loads on the row electrode 1511 of pixel correspondence of the bright state of full impregnated and this column electrode 1411 on these column electrode 1411 positions is identical, voltage magnitude is identical, phase place is opposite, does not need the high-frequency and high-voltage positive negative pulse stuffing frequency of loading on the row driving pulse that loads on the corresponding row electrode 1511 of driven pixel (promptly keeping vaporific shading state) and this column electrode 1411 identical on these column electrode 1411 positions, voltage magnitude is identical, phase place is identical; For the pixel that need be driven to the GTG attitude on these column electrode 1411 positions, the gray level information that has according to this GTG attitude, several portions waveform in the row driving pulse that loads on the row electrode 1511 of this pixel correspondence is identical with high-frequency and high-voltage positive negative pulse stuffing frequency, voltage magnitude is identical, phase place is identical, and the remainder waveform is identical with high-frequency and high-voltage positive negative pulse stuffing frequency, voltage magnitude is identical, phase place is opposite; The voltage magnitude of this high-frequency and high-voltage positive negative pulse stuffing is less than threshold voltage magnitude (U
Threshold) and the voltage magnitude of this high-frequency and high-voltage positive negative pulse stuffing of twice greater than threshold voltage magnitude.For example, for the high-frequency and high-voltage positive negative pulse stuffing waveform shown in Fig. 3 B, then be U
m＜U
Threshold, and 2U
m＞U
ThresholdThe pulse of this high-frequency and high-voltage positive negative pulse stuffing that loads can be more than or equal to 1 and smaller or equal to 2000 number, and its frequency can be more than or equal to 1kHz and smaller or equal to 50kHz, and its voltage magnitude can be more than or equal to 5v and smaller or equal to 250v.Preferably, the voltage magnitude of this high-frequency and high-voltage positive negative pulse stuffing is 100v.
For example, the pixel that x column electrode 1411 and y row electrode 1511 are constituted need be driven to the bright state of full impregnated, and the pixel that x column electrode 1411 and y+1 row electrode 1511 are constituted does not need to be driven, so, high-frequency and high-voltage positive negative pulse stuffing that on x column electrode 1411, loads and the high-frequency and high-voltage positive negative pulse stuffing antiphase that on y row electrode 1511, loads, high-frequency and high-voltage positive negative pulse stuffing that on x column electrode 1411, loads and the high-frequency and high-voltage positive negative pulse stuffing same-phase that on y+1 row electrode 1511, loads.
Because x column electrode 1411 is opposite with impulse phase on y the row electrode 1511, the pulse voltage amplitude that obtains after the superimposed pulses on x column electrode 1411 and y the row electrode 1511 is 2U
m, and 2U
m＞U
ThresholdSo,, the arrangement form of the smectic phase liquid crystal molecule 131 that x column electrode 1411 and y row electrode 1511 are corresponding changes, and the pixel that x column electrode 1411 and y row electrode 1511 are constituted is driven to the bright state of full impregnated.Specifically, when a pair of frequency identical, voltage magnitude is identical, the high-frequency and high-voltage positive negative pulse stuffing that phase place is opposite is loaded into x column electrode 1411 respectively, on y the row electrode 1511 (this frequency control to the high-frequency and high-voltage positive negative pulse stuffing can make the smectic phase liquid crystal molecule that the high-frequency range of regularly arranged form takes place), and behind this positive negative pulse stuffing effect one Preset Time, the smectic phase liquid crystal molecule 131 that x column electrode 1411 is corresponding with the pixel place that y row electrode 1511 constituted becomes regularly arranged form, as shown in Figure 6, at this moment, the long optical axis of smectic phase liquid crystal molecule 131 is perpendicular to the conductive electrode layer plane, the ray refraction of each smectic phase liquid crystal molecule 131 of incident does not produce acute variation, light can freely see through x column electrode 1411 and y the pixel that row electrode 1511 is constituted, therefore, x column electrode 1411 and y the pixel that row electrode 1511 is constituted are crossed in the complete transmission of light, on macroscopic view, the pixel that x column electrode 1411 and y row electrode 1511 are constituted is the bright state of a kind of full impregnated by vaporific shading state-transition.
Because x column electrode 1411 is identical with impulse phase on y+1 the row electrode 1511, the pulse voltage amplitude that obtains after the superimposed pulses on x column electrode 1411 and y+1 the row electrode 1511 is 0, and 0＜U
ThresholdSo, the arrangement form of the smectic phase liquid crystal molecule 131 that x column electrode 1411 is corresponding with the pixel place that y+1 row electrode 1511 constituted does not change, the pixel that x column electrode 1411 and y+1 row electrode 1511 are constituted is not driven, the vaporific shading state of (display screen init state) when keeping display image not.The microscopic pattern of the vaporific shading state during the display screen init state as shown in Figure 5, smectic phase liquid crystal molecule 131 is out of order arrangement form, the low-frequency high-voltage positive negative pulse stuffing identical by a pair of frequency, that voltage magnitude is identical, phase place is opposite (Fig. 3 A shows an example of low-frequency high-voltage positive negative pulse stuffing) produces when being loaded into first, second conductive electrode layer respectively, does not here give unnecessary details in detail.The pulse of the low-frequency high-voltage positive negative pulse stuffing that loads can be more than or equal to 1 and smaller or equal to 500 number, and its frequency can be more than or equal to 1Hz and smaller or equal to 100Hz, and its voltage magnitude can be more than or equal to 5v and smaller or equal to 250v.
And, though each row electrode 1511 all has pulse to load,, except x column electrode 1411 load pulses, because other column electrodes 1411 all connect 0V voltage, therefore, it is U that all pixels on other column electrode 1411 positions all are in amplitude
mPulse action under, these pixels can not be driven.
For the pixel that need be driven to the GTG attitude on the column electrode position, the smectic phase liquid crystal molecule 131 of this pixel place correspondence is in a certain arrangement form between regularly arranged form shown in Figure 6 and the out of order arrangement form shown in Figure 5, thereby makes this pixel present a kind of gray scale states between the bright and vaporific lucifuge state of full impregnated.
In actual applications, upper and lower half screen also can adopt the line jump scanning type of drive to come display image respectively.The line jump scanning type of drive is a kind of and the row that displaying contents is arranged driven shows and the row of no displaying contents skipped the mode of not carrying out driving.
In the present invention, threshold voltage is smectic phase liquid crystal molecule 131 to be driven the magnitude of voltage that arrangement form changes takes place, and it is to determine according to the composition of mixolimnion 13 and thickness, is generally more than the 5V.In addition, in the present invention, a direct impulse in the low-frequency high-voltage positive negative pulse stuffing adds a negative-going pulse, and to be called as a pulse right, and in the same manner, a direct impulse in the high-frequency and high-voltage positive negative pulse stuffing adds a negative-going pulse and is called as a pulse to (for example shown in Fig. 3 A and Fig. 3 B).Corresponding time span can be calculated according to the frequency and the pulse that load the low-frequency high-voltage positive negative pulse stuffing to number, in the same manner, corresponding time span can be calculated to number according to the frequency and the pulse that load the high-frequency and high-voltage positive negative pulse stuffing.
In the reality, according to showing needs, also can be mixed with a certain amount of dichroic dye in the mixolimnion 13, like this, smectic liquid crystal display screen 1 just can switch between the bright and coloured shading of full impregnated.For the smectic liquid crystal display screen 1 that has mixed dichroic dye, the smectic liquid crystal display screen identical (its image Display Realization principle is similar to the smectic liquid crystal display screen of above-mentioned unmixed dichroic dye) of its driving method and above-mentioned unmixed dichroic dye here repeats no more.
Advantage of the present invention is: the smectic liquid crystal display screen among the present invention has upper and lower half screen, upper and lower half screen is to carry out image simultaneously to show, thereby, show that with a monoblock display screen entire image compares, the speed that adopts the inventive method to carry out image refreshing is improved significantly, and the display screen structure among the present invention and the inventive method are specially adapted to the demonstration of high-definition picture.When the upper and lower half screen in the inventive method adopts fractional scanning type of drive, two fens algorithm turntable driving modes or out of order at random turntable driving mode, compare with sequential scanning type of drive line by line, fractional scanning type of drive, two fens algorithm turntable driving modes, the interference to image that sequential scanning type of drive line by line can be produced of out of order turntable driving mode evenly spread to half screen at random, and can be in the accumulation of same zone, avoided the image fault phenomenon, effectively improve the homogeneity that image shows, promoted the image display effect of smectic liquid crystal display screen.
The above is preferred embodiment of the present invention and the know-why used thereof; for a person skilled in the art; under the situation that does not deviate from the spirit and scope of the present invention; any based on conspicuous changes such as the equivalent transformation on the technical solution of the present invention basis, simple replacements, all belong within the protection domain of the present invention.
Claims (5)
1. column pulse dual-side driving method for smectic liquid crystal display screen, this smectic liquid crystal display screen comprises first base layer and second base layer, between first base layer and second base layer, be provided with the mixolimnion that forms by smectic phase liquid crystal and additives mixed, this smectic phase liquid crystal is a category-A smectic phase liquid crystal organic compound, this additive is the compound of band conductive characteristic, be provided with first conductive electrode layer at first base layer towards a side of mixolimnion, be provided with second conductive electrode layer at second base layer towards a side of mixolimnion, first conductive electrode layer is by the first column electrode unit, the second column electrode unit is formed, first, the second column electrode unit is formed by M strip line electrode that is arranged in parallel, second conductive electrode layer is by the first row electrode unit, the secondary series electrode unit is formed, first, the secondary series electrode unit is formed by N strip row electrode that is arranged in parallel, N row electrode of the M of first a column electrode unit column electrode and the first row electrode unit is perpendicular, this the first column electrode unit and the first row electrode unit form the first pixel array of a M * N, this first pixel array and pairing first base layer of this first pixel array, second base layer, mixolimnion constitutes goes up half screen, N row electrode of the M of second a column electrode unit column electrode and secondary series electrode unit is perpendicular, this second column electrode unit and secondary series electrode unit form the second pixel array of a M * N, this second pixel array and pairing first base layer of this second pixel array, second base layer, mixolimnion constitutes half screen down, and it is characterized in that: this method may further comprise the steps:
The initialization smectic liquid crystal display screen is with the piclear of smectic liquid crystal display screen demonstration;
Last half screen, following half screen drive according to the turntable driving mode procession of setting separately respectively, thereby half screen on this, following half screen are shown image separately respectively, wherein:
To half screen on this, in the half screen procession drives down the process, respectively a column electrode in the second pixel array of column electrode in the first pixel array of half screen on this and this time half screen is carried out turntable driving at synchronization;
Last half screen is in the column electrode of turntable driving on it, and according to the row image to display of this column electrode correspondence on the last half screen, each row electrode on the last half screen applies the respective column pulse respectively; Following half screen is in the column electrode of turntable driving on it, and according to the row image to display of this column electrode correspondence on the half screen down, each row electrode on the following half screen applies the respective column pulse respectively.
2. column pulse dual-side driving method according to claim 1 is characterized in that:
Row distance between electrodes in the first pixel array of described upward half screen is greater than 4 μ m and less than 10 μ m, and the row distance between electrodes in the second pixel array of described half screen down is greater than 4 μ m and less than 10 μ m.
3. column pulse dual-side driving method according to claim 1 and 2 is characterized in that:
The turntable driving mode that turntable driving mode that described upward half screen is adopted and described half screen are down adopted is identical or different.
4. column pulse dual-side driving method according to claim 1 and 2 is characterized in that:
Describedly go up turntable driving mode that half screen adopted and be sequential scanning type of drive line by line, fractional scanning type of drive, two fens algorithm turntable driving modes, any in the out of order turntable driving mode at random, the turntable driving mode that described half screen is down adopted is sequential scanning type of drive line by line, fractional scanning type of drive, two fens algorithm turntable driving modes, any in the out of order turntable driving mode at random.
5. column pulse dual-side driving method according to claim 4 is characterized in that:
When described when going up turntable driving mode that half screen and described half screen down adopted and being line by line the sequential scanning type of drive, the described half screen of going up walks to from the 1st that M is capable to carry out line by line that sequential scanning drives, described half screen down walks to the 1st row from M and carries out sequential scanning driving line by line, perhaps, the described half screen of going up walks to the 1st row from M and carries out line by line that sequential scanning drives, and described half screen down walks to from the 1st that M is capable to carry out line by line that sequential scanning drives.
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| CN 201010139674 CN101840682A (en) | 2010-04-01 | 2010-04-01 | Column pulse dual-side driving method for smectic liquid crystal display screen |
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| CN 201010139674 CN101840682A (en) | 2010-04-01 | 2010-04-01 | Column pulse dual-side driving method for smectic liquid crystal display screen |
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