CN100386796C - Electro-optical device, signal processing circuit thereof, signal processing method thereof and electronic apparatus - Google Patents
Electro-optical device, signal processing circuit thereof, signal processing method thereof and electronic apparatus Download PDFInfo
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- CN100386796C CN100386796C CNB2005100806216A CN200510080621A CN100386796C CN 100386796 C CN100386796 C CN 100386796C CN B2005100806216 A CNB2005100806216 A CN B2005100806216A CN 200510080621 A CN200510080621 A CN 200510080621A CN 100386796 C CN100386796 C CN 100386796C
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Abstract
An electro-optical device includes a plurality of scanning lines that extends in a row direction, a plurality of data lines that extends in a column direction, a plurality of pixels which are provided at intersections of the scanning lines and the data lines and whose gray-scale levels are designated by data signals supplied through the data lines, a common electrode that is provided so as to be opposite to pixel electrodes, a shift register that outputs sampling signals to sequentially select a plurality of blocks each composed of a plurality of the data lines, in a period where the scanning lines are selected, a sampling circuit that samples the data signals to the plurality of data lines belonging to the block selected by the sampling signal, respectively, a data signal supply circuit that changes the potential of the data signal into a higher level and a lower level than a predetermined potential in every predetermined period and then alternately outputs the potentials, and a correction circuit that superimposes, on the data signals, correction signals for correcting potential errors that are generated in the data lines belonging to each of the blocks, corresponding to the potentials of the data lines.
Description
Technical field
The present invention relates to prevent the technology that the display quality that occurs at column direction reduces.
Background technology
In recent years, popularizing the electrooptic panel that adopts liquid crystal etc. always, forming compact image, simultaneously the projector by this compact image of optical system enlarging projection.Projector, itself does not have the function of construction drawing picture, receives the supply of view data (or picture signal) from the upper level device of computer or television tuner etc.This view data is meant the data of the gray shade scale (brightness) of fixation element, owing to supply with the form of the pixel of vertical scanning and the rectangular arrangement of horizontal scanning, even therefore for the electrooptic panel that is used for projector, also is fit to drive based on this form.For this reason, be used for the electrooptic panel of projector, generally drive in the dot sequency mode, it specifically is the select progressively data line, simultaneously during 1 sweep trace of selection (1 horizontal scan period), select data line by root successively, will supply with the data line of selecting with the picture signal of the mode conversion view data that is fit to liquid crystal drive.
Nearest in addition, as high-definition television etc., advance the high-definition of display image.High-definition, though can finish by the radical of increase sweep trace and the radical of data line, because of increasing the radical of sweep trace, 1 horizontal scan period shortens, and, in the dot sequency mode, because of increasing the radical of data line, also shorten during the selection of data line.For this reason, in the dot sequency mode, along with carrying out high-definition, can not fully guarantee to supply with to data line the time of picture signal, the result causes the deficiency that writes on pixel.
For this reason, writing deficiency with solution is purpose, proposes to be called the mode (with reference to patent documentation 1) that phase demodulation drives.This phase demodulation drives, its mode is, 1 horizontal scan period, by for example per 6 of predetermined radical, select data line simultaneously, simultaneously with respect to time shaft, 6 times of prolongations with select sweep trace and select the picture signal of the corresponding supply pixel of data line, supply with every of 6 data lines of selection.In this phase demodulation type of drive, with the dot sequency mode relatively because in this embodiment can 6 times of times that picture signal be guaranteed to supply with to data line in ground, therefore think suitable high-definition.
Patent documentation 1: the spy opens the 2000-112437 communique
, if cause cost to increase, so seek high-definition with the sweep trace radical of increase unit length and the mode of number of data lines owing to enlarge the size of panel.But especially, if increase the number of data lines of unit length, because the arrangement pitches of data line narrows down, data line is coupled on electric capacity to each other easily, so the change in voltage of a certain data line all influences adjacent data line, the reduction of display quality is remarkable.
Summary of the invention
The present invention proposes in view of above situation, and its purpose is, even a kind of high-definition also can the suppress display quality electro-optical device that reduces, signal processing circuit and the disposal route and electronic equipment of electro-optical device is provided.
For achieving the above object, the present invention is characterized in that, possess: a plurality of pixels, be provided with accordingly with the infall of many data lines of the multi-strip scanning line of line direction setting and column direction setting, supply with data-signal, specify gray shade scale according to described data-signal from described data line; Common electrode is provided with described each pixel electrode subtend; Shift register, during selecting described sweep trace, output is used for a plurality of sampled signal that select progressively contains many described data lines; Sample circuit, described many data lines that belong to the piece of selecting according to described sampled signal separately in, the described data-signal of sampling; The data-signal supply circuit, by every the schedule time, Yu Ding current potential relatively, the current potential that makes described data-signal to high-order side and low level top-cross for change, output; Correction circuit, with the current potential of described data-signal accordingly, the corrected signal of the potential errors that will produce at described data line by each described correction, overlapping with described data-signal.According to the present invention, owing to, except that writing polarity, also specify gray shade scale correction, so can suppress the reduction of display quality by each according to the data-signal of the gray shade scale of pixel.
In the present invention, described correction circuit also can have: the 1st map table, the correction data of storage representation correction, this correction with set accordingly by the gray shade scale of the current potential appointment of the described high-order side of described data-signal; The 2nd map table, the correction data of storage representation correction, this correction with set accordingly by the gray shade scale of the current potential appointment of described low level side.Have under the situation of map table so, described correction circuit, in the correction data corresponding with the gray shade scale of appointment, be stored under the situation in the 1st or the 2nd map table, read the correction data of storage, simultaneously, in the correction data corresponding with the gray shade scale of appointment, be not stored under the situation in the 1st or the 2nd map table, from the correction data of storage, interpolation is obtained the correction data corresponding with the gray shade scale of appointment.In so constituting, the desired memory capacity of map table can be lacked.
Herein, described correction circuit of the present invention preferably, is revised the formation of the described data-signal of the data line of supplying with the boundary that is positioned at described.
In addition, the present invention, conceptive also can be as the signal processing circuit and the disposal route of electro-optical device.In addition, electronic equipment of the present invention owing to have above-mentioned electro-optical device, therefore can prevent the reduction of display quality.
Description of drawings
Fig. 1 is the block diagram that the integral body of the electro-optical device of expression embodiments of the present invention constitutes.
Fig. 2 is the figure of the formation of the electrooptic panel in this electro-optical device of expression.
Fig. 3 is the figure of formation of the pixel of this electrooptic panel of expression.
Fig. 4 is the figure of the formation of the correction circuit in this electro-optical device of expression.
Fig. 5 is the figure of the content of the correction in this correction circuit of explanation.
Fig. 6 is the figure of the work of this electro-optical device of explanation.
Fig. 7 is the figure of the work of this electro-optical device of explanation.
Fig. 8 is the figure that explanation pushes away down.
Fig. 9 is the figure of explanation according to the variation of the sustaining voltage of the different pieces of information line that pushes away down.
Figure 10 is the figure of the displacement of the voltage LCcom in expression the 1st, the 3rd step.
The figure of Figure 11 influence that to be explanation give to the change that writes current potential from precharge potential.
Figure 12 is the figure of the equal effect of the displacement of explanation and LCcom.
Figure 13 is that a routine electronic equipment of this electro-optical device of expression application is the figure of the formation of projector.
Among the figure: 10-electro-optical device, 50-treatment circuit, 52-control circuit, the 100-panel, 112-sweep trace, 114-data line, 116-TFT, 118-pixel electrode, 130-scan line drive circuit, the 142-shift register, the 150-sampling switch, 171-image signal line, 300-data-signal supply circuit, 321,326-correction circuit, 2100-projector.
Embodiment
Below, with reference to the description of drawings embodiments of the present invention.Fig. 1 is the block diagram of expression according to the integral body formation of the electro-optical device of present embodiment.
As shown in the drawing, electro-optical device 10 roughly is divided into treatment circuit 50 and panel 100.Wherein, treatment circuit 50 is formed in the circuit module on the printed base plate, is connected with panel 100 by FPC (Flexible PrintedCircuit, flexible print circuit) substrate etc.
Wherein, S/P translation circuit 310, synchronous with vertical scanning signal Vs and horizontal time-base Hs and Dot Clock signal DCLK, never the view data Vid of the numeral of illustrated upper level unit feeding distributes to 6 passages simultaneously, simultaneously respectively in 6 times of prolongations of time shaft (being also referred to as phase demodulation or serial-parallel conversion), as view data Vd1d～Vd6d output.In addition, for ease of explanation, view data Vd1d～Vd6d is called passage 1～6.
Herein, view data Vid is during level effectively shows, with the brightness of gray-level value specified pixel, in addition, is during horizontal flyback sweep, pixel is specified in the data of minimum gray shade scale (black).
In addition, during horizontal flyback sweep, pixel being specified in the reason of minimum gray shade scale, mainly is because even supply with pixel by timing slip etc., can not make this pixel help to show.In addition, the reason of serial-parallel conversion view data Vid is because in sampling switch described later, prolongs the time that adds data-signal, to guarantee sampling and the retention time and the time of discharging and recharging.
D/A translation circuit group 330 is provided in a side of the aggregate of the D/A transducer on each passage, with view data Vd1f, Vd2d～Vd5d, Vd6f, is transformed into the simulating signal of the voltage of corresponding grey scale grade point respectively.
Amplifying phase inverter 340, as described later, is benchmark with voltage Vc, is just changeing or the signal of reversal of poles analog converting, supplies with panel 100 as data-signal Vid1～Vid6.
About reversal of poles, (a) every sweep trace, (b) every data line, (c) every pixel, (d) every picture multiple modes such as (frames) are arranged, but in the present embodiment, predetermined is the reversal of poles of (a) every sweep trace.But aim of the present invention is not limited thereto.
In addition, voltage Vc, shown in Figure 7 as described later, be the amplitude center voltage of picture signal.In addition, in the present embodiment, for convenience, Vc compares with the amplitude center voltage, respectively high-order voltage is called positive polarity, and low level voltage is called negative polarity.
In the present embodiment, for behind serial-parallel conversion view data Vid, carrying out the formation of analog converting, certainly, also can before serial-parallel conversion, carry out analog converting.
At this, the formation of panel 100 is described.This panel 100 changes the formation predetermined picture by electric light, and Fig. 2 is the block diagram that the electricity of expression panel 100 constitutes.In addition, Fig. 3 is the diagram of detailed formation of the pixel of expression panel 100.
As shown in Figure 2, in panel 100, many sweep traces 112 extend and are connected laterally on (line direction, directions X), and many in addition data lines 114 are extended in the drawings and are connected on vertical (column direction, Y direction).And the mode corresponding respectively with the infall of these sweep traces 112 and data line 114 is provided with pixel 110 respectively, constitutes viewing area 100a.
In the present embodiment, imagination is set at " m " with the radical (line number) of sweep trace 112, and the radical (columns) of data line is set at " 6n " (multiples of 6), pixel 110, with vertical m capable * formation of the rectangular arrangement of horizontal 6n row.
To 6 chromosome image signal lines 171, supply with data-signal Vid1～Vid6 respectively by amplifying phase inverter 340.
On an end of each data line 114, sampling switch 150 is set respectively, be used for sampling separately and supply with the data-signal Vid1～Vid6 of image signal line 171 at data line 114.Each sampling switch 150 in the present embodiment, is the thin film transistor (TFT) (Thin Film Transistor is hereinafter referred to as TFT) of n channel-type, and its drain electrode is connected on the data line 114, and its grid is 1 unit with 6 data lines 114 in addition, is connected jointly.
Herein, consideration will connect the data line 114 of grid of sampling switch 150 jointly as 1 piece.And, considering under the situation of piece so, in Fig. 2, from left number on an end of the data line 114 of j row, the sampling switch 150 that connects drain electrode, if are " 1 " with 6 remainders divided by j, its source electrode just is connected on the image signal line 171 of supply data-signal Vid1.Equally, on the data line 114 that with 6 remainders is " 2 ", " 3 ", " 4 ", " 5 ", " 0 ", connect sampling switch 150 source electrode separately of drain electrode, be connected on the image signal line 171 of supplying with data-signal Vid2～Vid6 divided by j.For example, in Fig. 2, connect the source electrode of the sampling switch 150 of drain electrode at the data line 114 of the 11st row from left number, owing to are " 5 " with 6 remainders divided by " 11 ", so be connected on the image signal line 171 of supply data-signal Vid5.In addition, said herein " j " is used for vague generalization explanation data line 114, is the positive integer that satisfies 1≤j≤6n.
Scan line drive circuit 130, as shown in Figure 6, press the timing of the level transitions (rise or descend) of clock signal CLY, the transmission of the initial supply of input during vertical effectively demonstration begins pulsed D Y, displacement successively simultaneously, as only horizontal scan period (1H) H be (height) level sweep signal G1, G2 ..., Gm exclusively exports successively.In addition, about the detailed formation of scan line drive circuit 130, since not directly related with the present invention, so omit.
In addition, shift register 142, as shown in Figure 6, press the timing of the level transitions of clock signal CLY, the transmission of the initial supply of input during level effectively shows begins pulsed D X, simultaneously this pulse width is dwindled in displacement successively, as sampled signal S1, S2, S3 ..., S (n-1), Sn output.In addition, about the detailed formation of this shift register 142, since not directly related with the present invention, so omit.
These sampled signals S1, S2, S3 ..., Sn, in Fig. 2, jointly supplied with the grid of the sampling switch corresponding with the data line 114 of blocking.For example, on several the 2nd pieces, because corresponding, so, jointly supply with sampled signal S2 to the grid of the sampling switch 150 corresponding with these data lines 114 with the data line 114 of the 7th row～the 12 row from a left side.
In addition,, be the n channel-type in the present embodiment, but also can be the p channel-type about constituting the TFT of sampling switch 150, also can be for making up the complementary type of two kinds of raceway grooves.
Below, pixels illustrated 110.
As shown in Figure 3, in pixel 110, on data line 114, connect the source electrode of the TFT116 of n channel-type, on pixel electrode 118, connect drain electrode simultaneously, on sweep trace 112, connect grid in addition.
In addition,, whole pixels jointly are provided with common electrode 108, maintain the voltage LCcom that supplies with by control circuit 52 simultaneously with pixel electrode 118 subtends ground.And, between these pixel electrodes 118 and common electrode 108, clamping liquid crystal layer 105.Therefore, each pixel can both constitute the liquid crystal capacitance that is made of pixel electrode 118, common electrode 108 and liquid crystal layer 105.
Though do not illustrate especially, but on each subtend face of two substrates, the alignment films of friction treatment is set respectively, so that the major axis of liquid crystal molecule reverses continuously to for example about 90 degree between two substrates, in each rear side of two substrates, the polarizer according to direction of orientation is set respectively in addition.
By the light between pixel electrode 118 and the common electrode 108, if the voltage effective value that adds to liquid crystal electric capacity is zero, reversing just along liquid crystal molecule, about 90 degree optically-actives, along with the increase of this voltage effective value, liquid crystal molecule tilts to direction of an electric field in addition, as a result, its optical activity disappears.Therefore, for example in transmission-type, if respectively in light incident side and rear side, with direction of orientation as one man, configuration polarization axle mutually orthogonal polarizer, as long as this voltage effective value is near zero, the optical transmission rate just becomes maximum, becomes white and shows, in addition along with the increase of this voltage effective value, the light quantity of transmission reduces, and then becomes the black display (normal white mode) of transmissivity minimum.
In addition, in liquid crystal capacitance, be difficult to leak, therefore form memory capacitance 109 by every pixel in order to make electric charge.One end of this memory capacitance 109 is connected on the pixel electrode 118 (drain electrode of TFT116), in addition, and its other end and whole pixel common grounds.
In addition, the TFT116 on the pixel 110 is formed by scan line drive circuit 130 or shift register 142, the composed component of sampling switch 150 and common manufacturing process, helps the miniaturization or the cost degradation of device integral body.
Return the explanation of Fig. 1.Control circuit 52, from Dot Clock signal DCLK, vertical scanning signal Vs and horizontal time-base Hs by the upper level unit feeding, generate and transmit beginning pulsed D X and clock signal CLX, utilize the scanning of shift register 142 controlling level, generate simultaneously and transmit beginning pulsed D Y and clock signal CLY, utilize scan line drive circuit 130 control vertical scanning.
In addition, control circuit 52, synchronous with horizontal scanning, control the phase demodulation on the above-mentioned S/P translation circuit 310, the signal PL that writes polarity, the signal Md that reaches designated mode are specified in output simultaneously.
Herein, pattern in the present embodiment, the adjusting pattern that the display mode of common demonstration work is arranged and be used to regulate.Under the situation that is the adjusting pattern, control circuit 52 makes the outer voltage LCcom that adds to common electrode 108, compares with the value in the display mode, respectively in high-order side and low level side oscillation.In addition, the voltage LCcom in the display mode is being that voltage Vc compares the mode that becomes low level and sets with the benchmark of reversal of poles.
In addition, amplify phase inverter 340, if specify positive polarity to write with signal PL, signal by D/A translation circuit group 330 analog convertings is just changeed, in addition, if specify negative polarity to write with signal PL, reversal of poles is respectively as data-signal Vid1～Vid6 output.
Below, the work of electro-optical device 10 is described.In the present embodiment, because correction circuit 321 (326) has feature, at first, improper under the situation that does not have correction circuit 321 (326) is described, then, illustrate under the situation when having correction circuit 321 (326) how to eliminate its inappropriate expansion explanation.
Therefore, at first, the work when not having correction circuit 321 (326) is described, that is, the directly work when D/A changing image data Vd1d, Vd6d.Fig. 6 is the diagram that is used for illustrating the work of the vertical scanning of electro-optical device 10 and horizontal scanning.Fig. 7 is the diagram of example that is illustrated in the voltage waveform of the data-signal that continuous horizontal scan period supplies with.
Vertical initial during effectively showing, transmit beginning pulsed D Y and be supplied to scan line drive circuit 130.By this supply, as shown in Figure 6, sweep signal G1, G2 ..., Gm exclusively is the H level successively, exports to sweep trace 112 respectively.Therefore, at first be conceived to the horizontal scan period that sweep signal G1 is the H level.
Horizontal scan period is divided into during the horizontal flyback sweep and during the level of joining with it effectively shows.During level effectively shows, with the view data Vid that horizontal scanning is synchronously supplied with, the 1st step, distribute to 6 passages by S/P translation circuit 310, with respect to 6 times of prolongations of time shaft, the 2nd step is by D/A translation circuit group 330 simultaneously, be transformed into simulating signal respectively, in the 3rd step,, write accordingly with positive polarity by amplifying phase inverter 340, with voltage Vc is benchmark, just transfers out.Therefore, amplify the voltage of the data-signal Vid1～Vid6 of phase inverter 340 formation, make the pixel deepening more, be a high position higher more than voltage Vc.
In addition, during the level that sweep signal G1 becomes the H level effectively shows in, as shown in Figure 6, shift register 142, by utilizing clock signal C LX input to transmit beginning pulsed D X, displacement successively, output simultaneously dwindle this pulse width sampled signal S1, S2, S3 ..., Sn.
Herein, during sweep signal G1 becomes the horizontal effective scanning of H level in, if sampled signal S1 becomes the H level, just 6 data lines 114 that belong to several No. 1 pieces from a left side, the signal of the correspondence among sampled data signal Vid1～Vid6 respectively.Then, the data-signal Vid1～Vid6 of sampling, outer respectively adding to, in Fig. 2 from the pixel electrode 118 of pixel of data line 114 infalls of the sweep trace 112 of several the 1st row and these 6 (several the 1st～6 row) from a left side.
Then, if sampled signal S2 becomes the H level, current in belonging to 6 data lines 114 of No. 2 piece, difference sampled data signal Vid1～Vid6, these data-signals Vid1～Vid6, outer respectively adding to, the pixel electrode 118 of the pixel of data line 114 infalls of the sweep trace 112 of the 1st row and these 6 (several the 7th～12 row) from a left side.
Below same, if sampled signal S3, S4 ..., S (n-1), Sn become the H level successively, belong to No. 3, No. 4 ..., in 6 data lines 114 of the piece of n number, the signal of the correspondence among sampled data signal Vid1～Vid6, these data-signals Vid1～Vid6, outer respectively adding to, the pixel electrode 118 of the sweep trace 112 of the 1st row and the pixel of these data line of 6,114 infalls.Thus, finish writing to the 1st all pixels of going., even sweep signal G1 become L (low) level TFT116 disconnect, also can keep the voltage that writes by liquid crystal capacitance or memory capacitance 109 thereafter.
Then, illustrate sweep signal G2 become the H level during.In the present embodiment, as mentioned above,, during this level effectively shows, carry out negative polarity and write owing to carry out the reversal of poles of sweep trace unit.
In addition, during horizontal flyback sweep, the blackization of view data Vid specified pixel, but owing to be that positive polarity writes in during the effective demonstration of level in front, so data-signal Vid1～Vid6, as shown in Figure 7, in the approximate centre timing during this horizontal flyback sweep, add to outside under the situation of the pixel electrode 118 on the pixel 110, from the positive polarity voltage Vb (+) of the black that this pixel is predefined for minimum gray shade scale, switch to reverse voltage Vb (-) from the black that this pixel is predefined for minimum gray shade scale.
In addition, mention the relation of the voltage among Fig. 7, voltage Vw (-), Vg (-) add under the situation of the pixel electrode 118 on the pixel 110 outside, are the reverse voltages of the grey of the white that respectively this pixel is predefined for the highest gray shade scale, middle gray grade.In addition, Vw (+), Vg (+) add under the situation of the pixel electrode 118 on the pixel 110 outside, are the positive polarity voltages of the grey of the white that respectively this pixel is predefined for the highest gray shade scale, middle gray grade, when being benchmark, be symmetric relation with Vw (-), Vg (-) with voltage Vc.
Work during the level that sweep signal G2 becomes the H level effectively shows, same during the level that becomes the H level with sweep signal G1 effectively shows, sampled signal S1, S2, S3 ..., Sn becomes the H level successively, finishes writing all pixels of the 2nd row.But, because sweep signal G2 is that negative polarity writes during becoming the effective demonstration of the level of H level,, write accordingly with negative polarity so amplify phase inverter 340, be benchmark with voltage Vc, the signal of 6 passages is given in counter-rotating output distribution prolongation.Therefore, the voltage of data-signal Vid1～Vid6 as shown in Figure 7, makes the pixel deepening more, more the low level lower than voltage Vc.
Below same, sweep signal G3, G4 ..., Gm becomes the H level, carry out with respect to the 3rd row, the 4th row ..., the writing of pixel that m is capable.Thus, the pixel of odd-numbered line is carried out positive polarity write, in addition the pixel of even number line is carried out negative polarity and write.In this 1 vertical scanning period, finish writing to all capable pixels of the 1st row～the m.
In addition, data-signal Vid1～Vid6, in the approximate centre timing during horizontal flyback sweep, during the level that writes from positive polarity effectively shows, under the situation about during the level that negative polarity writes effectively shows, shifting, switch to voltage Vb (-) from voltage Vb (+), during the level that writes from negative polarity effectively shows, under the situation about during the level that positive polarity writes effectively shows, shifting, switch to voltage Vb (+) from voltage Vb (-).
In addition, in following 1 vertical scanning period, also carry out same writing, but replace the polarity that writes to each pixel of going this moment.That is, in following 1 vertical scanning period,, carry out negative polarity and write,, carry out positive polarity and write in addition to the pixel of even number line to the pixel of odd-numbered line.
So, because by the write polarity of per 1 vertical scanning period replacement, so, can prevent the deterioration of liquid crystal layer 105 not to liquid crystal layer 105 external dc components to pixel.
As mentioned above, in the present embodiment, in display mode, add to the voltage LCcom of common electrode 108 outward, set in the mode that becomes the low level lower than the voltage Vc of the benchmark of reversal of poles.Its reason is because consider the influence that pushes away (pushdown) under the what is called of the TFT that constitutes sampling switch 150.About pushing away under this, if brief description, be gate voltage (sampled signal) at TFT from H level (from being conducting to when disconnecting) when the L level changes, reduce the phenomenon of the voltage that remains on drain side.Its reason, owing to mainly be stray capacitance between gate-source, so source voltage is low more remarkable more.
Represent the influence that this time pushes away with waveform.For example for pixel is predefined for grey.As data-signal, when each vertical scanning period alternately write voltage Vg (+), Vg (-), the voltage waveform of the pixel electrode 118 on this pixel as shown in Figure 8.
In selecting 1 horizontal scan period of this pixel, TFT116 conducting, but in this horizontal scan period, only select piece during in, with sampling switch 150 conductings of this pixel corresponding data line.In other words, in the way of this horizontal scan period, sampling switch 150 disconnects.So at the data-signal that data line 114 is sampled, the following influence that pushes away when disconnected by sampling switch 150.In addition, as shown in the drawing, compare with following the pushing away behind the grey equivalent voltage Vg (+) that just writes positive polarity, just write following behind the grey equivalent voltage Vg (-) of negative polarity and pushed away increase.
So, at common electrode 108, be added with the voltage Vc of the benchmark of reversal of poles outward, because of the effective voltage of liquid crystal capacitance, because negative polarity writes and fashionablely write greater than positive polarity, so to liquid crystal capacitance external dc component.For avoiding this phenomenon, even the amount of pushing away is different on polarity down, the result equates the voltage effective value that adds to liquid crystal electric capacity, and the voltage LCcom that adds to common electrode 108 outward is set in the low level side lower than voltage Vc.
Herein, write in positive polarity and to write with negative polarity, writing when voltage Vc sees the voltage with symmetric relation, the voltage LCcom that dipolar effective voltage is equated is called best LCcom.
In addition, as mentioned above, under the narrow situation of the arrangement pitches of data line 114, the data line that has increases with the degree of adjacent data line capacitance coupling.
In addition, in the present embodiment, adopt blocking to gather the phase demodulation type of drive of selecting 6 data lines.In this phase demodulation type of drive, under the situation of a certain of selection, for the partial data line (with passage 2～5 corresponding data line) beyond the piece boundary separately, when the data line generation change in voltage of itself (during sampled data signal), change in voltage also takes place in the data line simultaneously adjacent in both sides.Relative therewith, for the data line (with passage 1,6 corresponding data line) of piece boundary section, when the data line generation change in voltage of itself, change in voltage takes place in the data line simultaneously adjacent in a side, but at the adjacent data line of opposite side change in voltage does not take place.Therefore, the degree that increases with additional capacitor equates, on the data line of piece boundary section, compares with the partial data line beyond the piece boundary, and amount of pushing away is compressed (with reference to Fig. 9 (a) and Fig. 9 (b) under it.
Therefore, the pixel of piece boundary section is compared the voltage effective value difference of liquid crystal capacitance with the pixel of piece boundary part in addition.So, for example promptly use the same grayscale grade to show, the gray shade scale of the pixel on the piece boundary section also is different from the gray shade scale of the pixel of the part beyond the piece boundary.Herein, the difference of the gray shade scale of pixel, owing to take place along the boundary of piece, so, lines longitudinally occur forming at viewing area 100a.
For this reason, the method for lines is so longitudinally eliminated in research.As mentioned above, the vertical main cause of lines is that the following amount of pushing away on the partial data line beyond the following amount of pushing away and the piece boundary on the data line of piece boundary section is different.Therefore, even the following amount of pushing away on the partial data line beyond the boundary of the following amount of pushing away on the data line of piece boundary section and piece is different,, also should be fine as long as voltage that final (postponing down) keeps forms consistent formation.As so constituting, suppose following 2 kinds.
Promptly, imagination, with on the partial data line beyond the piece boundary, the consistent mode of voltage of final maintenance on the data line of the final voltage that keeps and piece boundary section, the scheme (1) of correction image data (or data-signal), or opposite, with on the data line of piece boundary section, the consistent mode of voltage of final maintenance on the partial data line beyond the final voltage that keeps and the piece boundary, 2 kinds of the scheme (2) of correction image data (or data-signal).
Wherein, in the former scheme (1),, so in the present embodiment, adopt the scheme of (2) owing to except that the data-signal of revising most passages 2～5, also need to adjust voltage LCcom again.
Scheme (2) is so specialized, and is the correction circuit 321,326 among Fig. 1.Wherein, correction circuit 321, be used for so that by the piece boundary section with the final voltage that keeps of passage 1 corresponding data line, with the final consistent mode of voltage that keeps of data line by piece boundary passage 2～5 in addition, correction image data Vd1d, correction circuit 326, be used for so that by the piece boundary section with the final voltage that keeps of passage 6 corresponding data line, with the final consistent mode of voltage that keeps of data line by piece boundary passage 2～5 in addition, correction image data Vd6d.
Correction circuit 321,326 owing to be roughly the same formation, illustrates the detailed of correction circuit 321 with reference to Fig. 4 herein.
In the figure, selector switch (demultiplexer) 3212 is under the situation of being specified positive polarity to write by signal PL, select output terminals A, under the situation of specifying negative polarity to write by signal PL, select output terminal B in addition, to the view data Vd1d of the output end output phase demodulation of selecting.
Map table (the 1st map table) 3222, with positive polarity write fashionable corresponding, by revising data by each gray-level value storage of view data appointment.Herein, map table 3222, specifying by signal Md under the situation of display mode, read, export with by the corresponding correction data of the gray-level value of view data appointment, specifying under the situation of adjustment modes by signal Md in addition, no matter memory contents, the correction data of output correction zero, correction data that simultaneously will be corresponding with certain gray-level value change to from the adjustment data Px of adjuster 3216 outputs described later.
The correction data of storage in this map table 3222, in writing, positive polarity is added in view data Vd1d mutually, under situation based on this summarized information outputting data signals Vid1, by the final voltage that keeps of the data line of passage 1, be with by the final consistent value of voltage that keeps of the data line of passage 2～5.
Totalizer 3224, additive operation is from the view data Vd1d of selector switch 3212 outputs and the correction data of exporting from map table 3222, output then.
In addition, adjuster 3216 being specified by signal Md under the situation of adjustment modes, under the control of control circuit 52, generates the adjustment data M x that adjustment data Px that positive polarity uses and negative polarity are used respectively, output then.In addition, adjuster 3216 being specified by signal Md under the situation of display mode, as adjusting data Px, Mx, is exported remainder certificate respectively.
Operational data that totalizer 3226, additive operation are drawn by totalizer 3224 and the adjustment data Px that is drawn by adjuster 3216 supply with the input end A of selector switch 3214.
In addition, map table (the 2nd map table) 3232, with negative polarity write corresponding, by revising data by each gray-level value storage of view data appointment.Herein, map table 3232, specifying by signal Md under the situation of display mode, read, export with by the corresponding correction data of the gray-level value of view data appointment, specifying by signal Md under the situation of adjustment modes in addition, no matter memory contents, the correction data of output correction zero, correction data change that simultaneously will be corresponding with certain gray-level value is the adjustment data M x from adjuster 3216 outputs described later.
Totalizer 3234, additive operation is from the view data Vd1d of selector switch 3212 outputs and the correction data of exporting from map table 3232, output then.Operational data that totalizer 3236, additive operation are drawn by totalizer 3234 and the adjustment data M x that is drawn by adjuster 3216 supply with the input end B of selector switch 3214.
Selector switch (demultiplexer) 3214 under the situation of being specified positive polarity to write by signal PL, is selected input end A, in addition under the situation of specifying negative polarity to write by signal PL, select input end B,, supply with as corrected view data Vd1d with supplying with the data of the input end of selecting.
In addition, also form the formation identical with the corresponding correction circuit 326 of passage 6 with Fig. 4.
For ease of explanation, the work in the adjustment modes is described herein.This adjustment modes is with respect to map table 3222,3224, stores the pattern of upgrading the correction data corresponding with gray-level value.In adjustment modes, at the display surface of panel 100, CCD camera etc. for example is set, the picture of inspection, Flame Image Process actual displayed (it constitutes diagram and omits).And, in this adjustment modes, press each gray-level value K
4, K
8, K
12Repeat the work of the 1st～the 4th step.
Also have, in the present embodiment, shown in Fig. 5 (a), the minimum gray shade scale (deceiving) of pixel is gray-level value K
0, the highest gray shade scale (in vain) of pixel is gray-level value K
16, gray shade scale is therebetween pressed gray-level value K
1～K
15Predetermined.Therefore, with gray-level value K
8Corresponding gray shade scale is equivalent to the minimum gray shade scale and the middle of high gray shade scale.In addition, gray-level value K
4Be equivalent to minimum gray shade scale and gray-level value K
8The centre, gray-level value K
12Be equivalent to gray-level value K
8The centre of high gray shade scale.
Then, gray-level value K is described
8The the 1st～the 4th step.In addition, at gray-level value K
8The the 1st～the 4th step in, from the view data Vid of upper level unit feeding, become all pixels be appointed as and gray-level value K
8The content of corresponding gray shade scale.
At first, in the 1st step, control circuit 52 is predefined for zero mode with the value that will adjust data Px, Mx, and the adjuster 3216 of correction circuit 321 (326) is controlled.
In correction circuit 321 (326), if specify positive polarity to write by signal PL, because selector switch 3212 is selected output terminals A, selector switch 3214 is selected input end A, thus view data Vd1d, through map table 3222, totalizer 3224,3226.But in adjustment modes, because from map table 3222, output and the data of irrespectively being exported zero by the gray shade scale of view data Vid appointment are so the additive operation result who is drawn by totalizer 3224 is the view data Vd1d of phase demodulation itself.In addition, in adjustment modes, from totalizer 3226, the additive operation result who draws by totalizer 3224 is view data Vd1d and the additive operation result who adjusts data Px, but, be zero owing to adjust data Px, so view data Vd1d directly supply with the input end A of selector switch 3214 in this stage.
In addition, if specify negative polarity to write by signal PL, because selector switch 3212 is selected output terminal B, selector switch 3214 is selected input end B, so view data Vd1d, map table 3232, totalizer 3234,3236 are crossed in the footpath, but owing to write fashionable identical reason with specifying positive polarity, so view data Vd1d directly supplies with the input end B of selector switch 3214.
Therefore, in the 1st step, because the corrected view data Vd1f (Vd6f) that exports from selector switch 3214 is view data Vd1d (Vd6d) itself, thus add to the voltage waveform of the pixel electrode 118 of each pixel outward, the same shown in Figure 10 (a).That is, this voltage waveform itself, identical with the waveform of Fig. 8.In addition, in this expression, gray-level value K
8, corresponding with voltage data signal Vg (+) on positive polarity respectively, corresponding with voltage data signal Vg (-) on negative polarity.
In addition, in the 1st step, control circuit 52 shown in Figure 10 (a), makes the outer voltage LCcom of common electrode 108 that adds to the high-order side displacement higher than best LCcom.If voltage LCcom is shifted to high-order side, write the effective voltage increases that forms by negative polarity, write the effective voltage that forms by positive polarity in addition and reduce on the contrary.Herein, the gray shade scale of final pixel is because by being that the voltage effective value of unit is determined through negative polarity writes and positive polarity writes 2 vertical scanning period, so write the little side's of effective magnitude of voltage in the polarity influence to a great extent.Therefore, make voltage LCcom under the situation of high-order side displacement, it is poor that the difference that the effective voltage of positive polarity in writing occur becomes main gray shade scale.
As mentioned above, the following amount of pushing away that takes place at the data line of piece boundary section, owing to compare with the following amount of pushing away that takes place at piece boundary partial data line in addition, be compressed, if so see with voltage effective value, pixel one side of piece boundary section is greater than pixel one side of the part beyond the piece boundary, if see with gray shade scale, then deepening (normal white mode).Therefore, in the 100a of viewing area, with grey as a setting, occur than its dark lines longitudinally.
Then, as the 2nd step, control circuit 52, slowly to press the mode that same speed increases the value of adjusting data Px, Mx from zero respectively, adjuster 3216 to the correction circuit 321 corresponding with passage 1 is controlled, in addition, maintain zero mode, the adjuster 3216 of the correction circuit 326 corresponding with passage 6 is controlled with the value that will adjust data Px, Mx.
The additive operation result of totalizer 3226 (3236) in adjustment modes, is the value that data Px (Mx) are adjusted in addition in view data Vd1d (Vd6d).Therefore, if increase the value of adjusting data Px, Mx, owing to also increase the additive operation result of totalizer 3226 (3236), so corrected view data Vd1f, the direction bright to the gray shade scale that makes pixel changes.
So, the vertical corresponding pixel of the data line with passage 1 in the lines owing to become bright gradually, so become with and the corresponding identical gray shade scale of pixel of data line of passage 2～5, have the timing of eliminating the vertical lines of part.Become the same grayscale grade if distinguish from the result of the display frame of Flame Image Process panel 100, control circuit 52, just the adjuster 3216 of the correction circuit 321 corresponding with passage 1 is controlled, stop to adjust the increase of data Px, Mx, adjustment data Px that simultaneously will this moment is as the gray-level value K that writes with positive polarity
8Corresponding correction data, storage or updated stored content.Thus, in the correction circuit 321 of passage 1, obtain the gray-level value K that writes with positive polarity
8Corresponding correction data P
8(with reference to Fig. 5 (b)).
Then, in the 3rd step, control circuit 52 is controlled the adjuster 3216 of correction circuit 321 (326), and making the value of adjusting data Px, Mx is zero.
In addition, in the 3rd step, control circuit 52 shown in Figure 10 (b), makes the outer voltage LCcom of common electrode 108 that adds to the low level side displacement lower than best LCcom.If voltage LCcom is shifted to the low level side, because writing the effective voltage that forms by negative polarity reduces, write the effective voltage that forms by positive polarity in addition and increase on the contrary, mainly to become gray shade scale poor so the difference of the effective voltage of negative polarity in writing occurs.Therefore, in the 100a of viewing area, with grey as a setting, occur than its bright lines longitudinally.
Then, as the 4th step, control circuit 52, slowly to press the mode that same speed reduces the value of adjusting data Px, Mx from zero respectively, adjuster 3216 to the correction circuit 321 corresponding with passage 1 is controlled, in addition, maintain zero mode, the adjuster of the correction circuit 326 corresponding with passage 6 is controlled with the value that will adjust data Px, Mx.Therefore, if reduce the value of adjusting data Px, Mx, because the additive operation result of totalizer 3226 (3236) becomes subtraction in fact, thus corrected view data Vd1f, to the direction variation of the gray shade scale deepening that makes pixel.
So, the vertical corresponding pixel of the data line with passage 1 in the lines because deepening gradually, so become with and the corresponding identical gray shade scale of pixel of data line of passage 2～5, have the timing of eliminating the vertical lines of part.Become identical gray shade scale if distinguish from the result of the display frame of Flame Image Process panel 100, control circuit 52, just the adjuster 3216 of the correction circuit 321 corresponding with passage 1 is controlled, stop to adjust the reduction of data Px, Mx, adjustment data Px that simultaneously will this moment is as the gray-level value K that writes with negative polarity
8Corresponding correction data M
8Mode, to map table 3232, the storage or the updated stored content.Thus, in the correction circuit 321 of passage 1, obtain the gray-level value K that writes with negative polarity
8Corresponding correction data M
8
Repeat the 1st～the 4th identical step in the same manner.That is, accept to specify gray-level value K
4The supply of view data Vid, carry out relevant gray-level value K
4The the 1st～the 4th step, accept to specify gray-level value K
8The supply of view data Vid, carry out relevant gray-level value K
8The the 1st～the 4th step.
Thus, on the correction circuit 321,326 of passage 1,6, obtain and gray-level value K
4, K
12The correction data P of corresponding positive polarity
4, P
12And the correction data M of negative polarity
4, M
12Wherein, the correction data P of positive polarity
4, P
12, be stored in map table 3222, in addition the correction data M of negative polarity
4, M
12, be stored in map table 3232 (with reference to Fig. 5 (b)).
In this stage, on the correction circuit 321,326 of passage 1,6, only obtain and gray-level value K
4, K
8, K
12The correction data P of corresponding positive polarity
4, P
8, P
12And the correction data M of negative polarity
4, M
8, M
12Therefore, control circuit 52 is about the correction data corresponding with other gray-level value of positive polarity, from the correction data P that has obtained
4, P
8, P
12, obtain by interpolation, be stored in the map table 3222, on the other hand, about the correction data corresponding, from the correction data M that has obtained with other gray-level value of negative polarity
4, M
8, M
12, obtain by interpolation, be stored in the conversion form 3232.Thus, with as pressing the characteristic shown in Fig. 5 (c), will with gray-level value K
0～K
16The correction data P of the positive polarity that difference is corresponding
0～P
17Be stored in the map table 3222, in addition, will with gray-level value K
0～K
16The correction data M of the negative polarity that difference is corresponding
0～M
17Be stored in the map table 3232.This interpolation arithmetic, certainly the both sides at passage 1,6 carry out.
In addition, in the present embodiment,, select K as representational gray-level value
4, K
8, K
12, but so long as just can near the middle-gray range of intermediate value.Its reason be because, the voltage-transmission of liquid crystal (reflection) rate characteristic, the most intolerant and impetuous in grey, the difference that occurs effective voltage easily becomes the poor of demonstration.In other words, the gray-level value K of lower limit
0, the upper limit gray-level value K
16Near gray shade scale scope, even because the difference increase of effective voltage, as the difference that shows also appearance hardly, the therefore difficult gray-level value that is used as the basis that becomes interpolation.
The work of the correction circuit 321 (326) in the display mode then, is described.In addition, in display mode, suppose common demonstration work, do not need CCD camera in the adjustment modes etc. especially.
At first, if specify positive polarity to write by signal PL, because selector switch 3212 is selected output terminals A, selector switch 3214 is selected input end A, so via the path of map table 3222, totalizer 3224,3226, correction image data Vd1d (Vd6d).
In this path, at map table 3222, read and correction data by the corresponding positive polarity of the gray shade scale of view data Vd1d (Vd6d) appointment, should revise data and this view data Vd1d (Vd6d) by totalizer 3224 additive operations simultaneously.Because in display mode, adjusting data Px is zero, the result, corrected view data Vd1f (Vd6f) is the data that the correction data of addition positive polarity in view data Vd1d (Vd6d) draw.
In addition, if specify negative polarity to write by signal PL, because selector switch 3212 is selected output terminal B, selector switch 3214 is selected input end B, so via the path of map table 3232, totalizer 3234,3236, correction image data Vd1d (Vd6d).
In this path, at map table 3232, read and correction data by the corresponding negative polarity of the gray shade scale of view data Vd1d (Vd6d) appointment, should revise data and this view data Vd1d (Vd6d) by totalizer 3224 additive operations simultaneously.Because in display mode, adjusting data M x is zero, the result, corrected view data Vd1f (Vd6f) is the data that the correction data of addition negative polarity in view data Vd1d draw.
In the present embodiment, as mentioned above, the correction data of positive polarity and the correction data of negative polarity, owing to all be the voltage that finally keeps with data line by passage 1 (6), with by the final consistent mode of voltage that keeps of the data line of passage 2～5, the data of correction image data Vd1d (Vd6d), therefore under the situation of the demonstration that becomes the same grayscale grade at viewing area 100a with big area, the voltage unanimity that finally writes in each pixel, result can be suppressed at the generation of inequality of the vertical line strip of viewing area 100a.
In addition, in the above-described embodiment, in adjustment modes, after obtaining the correction data corresponding, utilize interpolation to obtain the correction data corresponding with other gray-level value with representational gray-level value, in map table 3222 (3232), revise data by each gray-level value storage, in addition, in display mode, formation from map table 3222 (3232) read with by the constituting of the corresponding correction data of the gray-level value of view data appointment, but also can be by following formation.
Promptly, also can be following formation, in adjustment modes, obtain the correction data corresponding with representational gray-level value, only make this correction data storage at map table 3222 (3232), in display mode, if the gray-level value by the view data appointment is stored in the map table 3222 (3232), just read these data, in addition, if be not stored in the map table 3222 (3232), then obtain from the correction data interpolating of gray-level value of storage.
That is, interpolation can be in adjustment modes, carried out, also interpolation can be in display mode, carried out as the enforcement mode
As implement mode, and in adjustment modes, carry out in the formation of interpolation, in display mode, also can not consider to follow the delay of the computing of interpolation, but increase the required memory capacity of map table 3222 (3232).On the contrary, carry out in display mode in the formation of interpolation, map table 3222 (3232) required memory capacity reduce, but need to consider to follow the delay of the computing of interpolation in display mode.
In addition, in embodiment since in each data line 114 stray capacitance, so if during level effectively shows sampled data signal, the voltage of this data-signal is remaining before next sampling.Therefore, also can be during horizontal flyback sweep, each data line 114 of precharge under predetermined voltage is removed remaining component of voltage, during level effectively shows, makes the term harmonization in data line 114 sampled data signal.
Figure 11 is illustrated in before positive polarity writes, and uses the voltage pre-charging data line near voltage LCcom, in addition before negative polarity writes, with the example near zero voltage pre-charging data line.
Carrying out under the so precharge situation, as shown in the drawing, if select certain piece,, be equivalent to the data line of passage 1 just at this piece, be changed to from precharge potential and write current potential.
Be positioned at the right adjacent data line of this data line, owing to change voltage simultaneously herein, with this data line, therefore be not subject to the influence of the change in voltage of this data line, but be positioned at the adjacent data line in a left side, because the sampling of data-signal finishes, so be subjected to the influence of the change in voltage of this data line.
So, be under the situation of right in horizontal scan direction, because of the change in voltage of the data line of the passage on certain piece 1, data line (being the in detail) variation in voltage that a left side is adjacent than the data line of the passage 6 on the piece of this piece 1 selection in advance.
Therefore, the data line of passage 6, not only because of under push away, and change because of pre-charge voltage.
In addition, in embodiment,, the voltage LCcom of common electrode 108 is shifted to high-order side, voltage LCcom is constituted to the displacement of low level side in the 3rd step in the 1st step of adjustment modes.Make the reason of voltage LCcom in the 1st step to high-order side displacement, be because of the difference performance of the difference of the effective voltage of positive polarity to show, making the reason of voltage LCcom to the displacement of low level side in the 3rd step, is because the difference performance of the difference of the effective voltage of negative polarity to show
Will as show the difference performance so just/effective voltage on negative polarity poor, except making voltage LCcom to the formation of high-order side/low level side displacement, also can enumerate following method.That is, in the 1st step of adjustment modes, write fashionablely in negative polarity, view data Vid is replaced as the data of specifying minimum gray shade scale (effectively voltage becomes the highest gray shade scale).If so displacement adds to the voltage waveform of pixel electrode 118 outward, shown in Figure 12 (a) since with make voltage LCcom equal when the high-order side displacement, so the effective voltage of positive polarity is poor, with the difference performance that shows.Equally,, write fashionablely in positive polarity, view data Vid is replaced as the data of specifying minimum gray shade scale in the 3rd step of adjustment modes.If so displacement adds to the voltage waveform of pixel electrode 118 outward, shown in Figure 12 (b) since with make voltage LCcom equal when the low level side be shifted, so the effective voltage of negative polarity is poor, shows with the difference that shows.
In addition, the gray shade scale when so replacing is not limited to minimum gray shade scale, near the gray shade scale it, and the gray shade scale that has the same effect is also passable.Specifically be, the briliancy of minimum gray shade scale is so long as 0%, so long as it is just passable smaller or equal to 10% gray shade scale scope to be equivalent to briliancy.
In addition, in embodiment, in the 1st, the 2nd step, obtain the correction data of positive polarity, in the 3rd, the 4th step, obtain the correction data of negative polarity and constitute, but also can be following formation,, obtain the correction data of negative polarity in the 1st, the 2nd step, in the 3rd, the 4th step, obtain the correction data of positive polarity.
In embodiment, vertical scanning direction is the downward direction of G1 → Gm, horizontal scan direction be S1 → Sn to right, but under the situation that is predefined for projector described later or rotary display device, need make the direction of scanning counter-rotating.
In addition, if the supply method of change view data Vid not necessarily needs the selecting sequence of sweep trace is predefined for the 1st, 2,3 row, for example also can be as 1,3,5 ..., (m-1), 2,4,6 ... the staggered scanning of m ground.That is, after selecting certain sweep trace, select other sweep trace, during certain unit (vertical scanning period), as long as final all sweep traces of selecting just can.
In addition, in embodiment,, carry out negative polarity in following 1 vertical scanning period and write,, can certainly carry out AC driving with the cycle more than it so the cycle of AC driving is 2 vertical scanning period owing to, carry out positive polarity and write in certain 1 vertical scanning period.
In the above-described embodiment, be predefined for blocking 6 data lines 114, be transformed into the phase demodulation type of drive of 6 passages of view data Vd1d～Vd6d, but port number and the number of data lines (that is, belonging to 1 number of data lines) that adds simultaneously are not limited to " 6 ".In addition, do not limit the phase demodulation type of drive especially,, can form the dot sequency mode yet for example so long as the formation of correction circuit is set by every data line.
In addition, in the above-described embodiment, be predefined for data-signal supply circuit 300, handle the view data Vid of numeral, but also can form the formation of the picture signal of treatment of simulated.And then, in the above-described embodiment, under the little situation of the voltage effective value of common electrode 108 and pixel electrode 118, to carry out the normal white mode explanation that white shows.But also can be the normal black mode that carries out black display.
In addition, in the above-described embodiment, adopt the TN type as liquid crystal, but also can adopt, as BTN (Bi-stable Twisted Nematic, bistable twisted to row) the strong dielectric type of type etc. have storage property the bistable typing or high-molecular dispersed and, will be at the long axis direction and the short-axis direction of molecule, in the absorption of visible light, has anisotropic dyestuff (guest), be dissolved in the liquid crystal (master) of certain molecules align the liquid crystal such as GH (host and guest) type that pigment molecule and liquid crystal molecule are arranged in parallel.
In addition, can constitute, when being formed on no impressed voltage Liquid Crystal Molecules Alignment with the vertical direction of two substrates, in addition, when impressed voltage Liquid Crystal Molecules Alignment with the formation of so-called vertical orientated (vertical orientation) of the horizontal direction of two substrates, can also constitute, when being formed on no impressed voltage Liquid Crystal Molecules Alignment with the horizontal direction of two substrates, in addition, when impressed voltage Liquid Crystal Molecules Alignment with the formation of so-called parallel (level) orientation (parallel orientation) of the vertical direction of two substrates.So, in the present invention,, can adopt multiple mode as liquid crystal or aligned.
Then, the example as the electronic equipment of the electro-optical device that adopts above-mentioned embodiment illustrate the projector that above-mentioned panel 100 is used as light valve.Figure 13 is the planimetric map of this projector of expression.As shown in the drawing, in projector 2100 inside, the lamp device 2102 that is made of white light sources such as Halogen lamp LEDs is set.From the projection light of these lamp device 2102 outgoing, by being configured in inner 3 catoptrons 2106 and 2 dichronic mirrors 2108, be separated into 3 primary colours of R (red), G (green), B (indigo plant), lead respectively to light valve 100R, 100G and the 100B corresponding with each primary colours.In addition, the light of B look, if with other R look or G color ratio because optical path length, so, be 2121 guiding by the relay lens that constitutes by incident lens 2122, relay lens 2123 and exit lens 2124 in order to avoid damage.
Herein, the formation of light valve 100R, 100G and 100B, same with the panel 100 in the above-mentioned embodiment, the picture signal by the R, the G that supply with from treatment circuit (omitting among Figure 13), B correspondence of all kinds drives respectively.That is, in this projector 2100, comprise the electro-optical device of panel 100, formation and R, G, B are of all kinds is provided with 3 groups accordingly, with the formation of the unconspicuous mode correction demonstration inequality on panel of all kinds that becomes respectively.
By the light of light valve 100R, 100G and 100B modulation, be incident on the colour splitting prism 2112 respectively from 3 directions.And, on this colour splitting prism 2112, the light 90 degree refractions of R look and B look, in addition, the light of G look directly advances.So, behind image synthetic of all kinds, on screen 2120, by projection lens 2114 projection of color images.
In addition, because on light valve 100R, 100G and 100B, by dichronic mirror 2108, projection and R, G, B corresponding light of all kinds be not so need color filter as mentioned above.In addition, because the transmission picture of light valve 100R, 100B, throw by colour splitting prism 2112 reflection backs, and the transmission picture of light valve 100G directly throws, so horizontal scan direction that light valve 100R, 100B form, the horizontal scan direction that forms with light valve 100G is opposite, forms the formation of the display image of counter-rotating about making.
As electronic equipment, except that reference Figure 13 explanation, also can enumerate video tape recorder, automobile navigation apparatus, pager, electronic memo, desk-top calculator, word processor, workstation, videophone, POS terminal, digital frequency still camera, mobile phone that TV, the type of finding a view monitor direct viewing type, have equipment of touch panel or the like.And,, certainly adopt display panel of the present invention for these various electronic equipments.
Claims (8)
1. electro-optical device is characterized in that possessing:
A plurality of pixels, the infall of the multi-strip scanning line of itself and line direction setting and many data lines of column direction setting is provided with accordingly, supplies with data-signal by described data line, and gray shade scale is specified by described data-signal;
Common electrode, itself and described each pixel electrode subtend are provided with;
Shift register, it is during described sweep trace is selected, and output is used for a plurality of sampled signal that select progressively contains many described data lines;
Sample circuit, its in every that belongs to according to described many data lines of selected of described sampled signal, the described data-signal of sampling;
The data-signal supply circuit, it is in each scheduled period, and Yu Ding current potential makes the current potential of described data-signal export for changing ground in high-order side and low level top-cross relatively; With
Correction circuit, the current potential of itself and described data-signal make the corrected signal of the potential errors that produces at described data line by each described correction accordingly, and be overlapping with described data-signal,
The potential errors that produces in described data line is in described under described data line, based on the described data line of described boundary section and the error of the difference of the following amount of pushing away of the current potential of the described data line of boundary part in addition.
2. electro-optical device as claimed in claim 1, it is characterized in that: in described correction circuit, according to the correction of the described data-signal of described corrected signal, when the current potential of described high-order side and during current potential, set respectively in described low level side with respect to described data-signal current potential.
3. electro-optical device as claimed in claim 1 or 2 is characterized in that:
Described correction circuit has:
The 1st map table, the correction data of storage representation correction, this correction with set accordingly by the gray shade scale of the current potential appointment of the described high-order side of described data-signal;
The 2nd map table, the correction data of storage representation correction, this correction with set accordingly by the gray shade scale of the current potential appointment of described low level side.
4. electro-optical device as claimed in claim 3 is characterized in that:
Described correction circuit,
With by the corresponding described correction data of the gray shade scale of described data-signal appointment, be stored under the situation in the 1st or the 2nd map table, read the correction data of storage, in addition in the correction data corresponding with the gray shade scale of appointment, be not stored under the situation in the 1st or the 2nd map table, from the correction data of storage, interpolation is obtained the correction data corresponding with the gray shade scale of appointment.
5. electro-optical device as claimed in claim 1 or 2 is characterized in that: described correction circuit, the described data-signal of the data line of the boundary that is positioned at described each piece is supplied with in correction.
6. the signal processing method of an electro-optical device, this electro-optical device possesses:
A plurality of pixels, the infall of the multi-strip scanning line of itself and line direction setting and many data lines of column direction setting is provided with accordingly, supplies with data-signal by described data line, and gray shade scale is specified by described data-signal;
Common electrode, itself and described each pixel electrode subtend are provided with;
Shift register, it is during described sweep trace is selected, and output is used for a plurality of sampled signal that select progressively contains many described data lines;
Sample circuit, its in every that belongs to according to described many data lines of selected of described sampled signal, the described data-signal of sampling; With
The data-signal supply circuit, it is in each schedule time, and Yu Ding current potential makes the current potential of described data-signal export for changing ground in high-order side and low level top-cross relatively;
The method is characterized in that:
With the current potential of described data-signal accordingly, make the corrected signal of the potential errors that in described data line, produces by each described correction, overlapping on described data-signal,
The potential errors that produces in described data line is in described under described data line, based on the described data line of described boundary section and the error of the difference of the following amount of pushing away of the current potential of the described data line of boundary part in addition.
7. the signal processing circuit of an electro-optical device, this electro-optical device possesses:
A plurality of pixels, the infall of the multi-strip scanning line of itself and line direction setting and many data lines of column direction setting is provided with accordingly, supplies with data-signal by described data line, and gray shade scale is specified by described data-signal;
Common electrode, itself and described each pixel electrode subtend are provided with;
Shift register, it is during described sweep trace is selected, and output is used for a plurality of sampled signal that select progressively contains many described data lines;
Sample circuit, its in every of described many data lines that belong to the piece of selecting according to described sampled signal, the described data-signal of sampling;
The data-signal supply circuit, it is in each schedule time, and Yu Ding current potential makes the current potential of described data-signal export for changing ground in high-order side and low level top-cross relatively;
This signal processing circuit is characterised in that:
With the current potential of described data-signal accordingly, make the corrected signal of the potential errors that in described data line, produces by each described correction, overlapping on described data-signal,
The potential errors that produces in described data line is in described under described data line, based on the described data line of described boundary section and the error of the difference of the following amount of pushing away of the current potential of the described data line of boundary part in addition.
8. electronic equipment is characterized in that:
Have as any one described electro-optical device in the claim 1～5.
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| JP6578850B2 (en) * | 2015-09-28 | 2019-09-25 | セイコーエプソン株式会社 | Circuit device, electro-optical device and electronic apparatus |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1164913A (en) * | 1995-08-30 | 1997-11-12 | 精工爱普生株式会社 | Image display, image displaying method, display driving device and electronic appliance using the same |
| JP2000112437A (en) * | 1998-10-01 | 2000-04-21 | Seiko Epson Corp | Driving circuit of electrooptical device, electrooptical device and electronic device |
| CN1300047A (en) * | 1999-12-10 | 2001-06-20 | 精工爱普生株式会社 | Photoelectric apparatus and driving method thereof, image treatment circuit and electronic machine |
| US20010043180A1 (en) * | 2000-04-06 | 2001-11-22 | Hideo Mori | Drive method for liquid crystal display device |
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- 2005-07-04 CN CNB2005100806216A patent/CN100386796C/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1164913A (en) * | 1995-08-30 | 1997-11-12 | 精工爱普生株式会社 | Image display, image displaying method, display driving device and electronic appliance using the same |
| JP2000112437A (en) * | 1998-10-01 | 2000-04-21 | Seiko Epson Corp | Driving circuit of electrooptical device, electrooptical device and electronic device |
| CN1300047A (en) * | 1999-12-10 | 2001-06-20 | 精工爱普生株式会社 | Photoelectric apparatus and driving method thereof, image treatment circuit and electronic machine |
| US20010043180A1 (en) * | 2000-04-06 | 2001-11-22 | Hideo Mori | Drive method for liquid crystal display device |
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| CN1719500A (en) | 2006-01-11 |
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