CN101441859A

CN101441859A - Crosstalk elimination circuit, liquid crystal display apparatus, and display control method

Info

Publication number: CN101441859A
Application number: CNA2008101863370A
Authority: CN
Inventors: 上野雅史; 近藤尚子; 古川浩之; 吉田育弘
Original assignee: Sharp Corp
Current assignee: Sharp Corp
Priority date: 2004-05-13
Filing date: 2005-05-09
Publication date: 2009-05-27
Anticipated expiration: 2025-05-09
Also published as: CN101441859B; CN101095183B; CN101095183A

Abstract

The crosstalk of a display apparatus can be efficiently eliminated to realize a precise, high-quality display. A liquid crystal display apparatus includes, as a crosstalk elimination circuit, an adjacent picture element acquisition circuit (1) that acquires display signals of picture elements adjacent to a self picture element, and two-dimensional LUTs (2) that use the display signals of the adjacent picture elements, acquired by the adjacent picture element acquisition circuit (1), to correct display signals of the self picture element so as to correct RGB display signals. The Picture element display signals as corrected by the correction values output from the LUTs (2) are output to a source driver (4) via a timing controlling unit (TC) (3). In the crosstalk elimination circuit, the display signals of a picture element to be corrected and those of picture elements adjacent tot the picture element that influence the picture element are used to acquire a correction value, thereby correcting the display signals of the correction target picture element.

Description

Crosstalk elimination circuit and liquid crystal indicator and display control method

The present patent application is that international application no is JP2005/008432, international filing date is on May 9th, 2005, the application number that enters the China national stage is 200580015269.6, and name is called the dividing an application of application for a patent for invention of " crosstalk elimination circuit and liquid crystal indicator and display control method ".

Technical field

The present invention relates to crosstalk elimination circuit, liquid crystal indicator and display control method, what specifically, the present invention relates to eliminate liquid crystal indicator crosstalks that high quality graphic shows crosstalk elimination circuit, the liquid crystal indicator with this crosstalk elimination circuit of usefulness and elimination is crosstalked and carry out the display control method that high quality graphic shows to carry out.

Background technology

As the display of computing machine and television receiver, popularized LCD.In the LCD, the most employing is provided with the active array type LCD panel of thin film transistor (TFT) (TFT (Thin Film Transistor)) as address-element.

In this active array type liquid crystal board, realized using the liquid crystal board of realizing the superelevation aperture opening ratio technology (being SHA (Super High Aperture Ratio) technology) of high brightness, high-contrast, low power consumption in recent years based on TFT.

Figure 12 is the figure of composition example usefulness of the pixel capacitors of the explanation TFT liquid crystal board that utilizes the SHA technology, and Figure 12 (A) is the approximate vertical view of pixel capacitors portion, and Figure 12 (B) is the lateral section summary composition diagram of pixel capacitors portion.Among Figure 12, the 11st, pixel capacitors, the 12nd, TFT, the 13rd, source electrode line, the 14th, gate line, the 15th, stray capacitance, the 16th, special resin.

On the active matrix substrate, form a plurality of pixel capacitors 11 rectangularly.And each pixel capacitors 11 is provided as the TFT12 of on-off element, is connected on each pixel capacitors 11.The grid of TFT12 connects supplies with the gate line 14 that sweep signal is used, and by the signal that is input to grid TFT is made drive controlling.Each pixel corresponding with pixel capacitors 11 is called sub-pixel, is generally used for showing of the same colour in RGB three looks.So, the synthesis of 3 pixels of RGB is called pixel.

The source electrode of above-mentioned TFT12 connects the source electrode line 13 of supplying with shows signal (data-signal) usefulness, and when drive TFT 12, by TFT12 shows signal is input to pixel capacitors 11.These gate lines 14 and source electrode line 13 are configured to be arranged in the mutually orthogonal of rectangular pixel capacitors 11 on every side.

The liquid crystal board of SHA structure is used as interlayer dielectric with special resin 16, to obtain the superelevation aperture opening ratio.Shown in Figure 12 (B), has the spatial structure that pixel capacitors 11 is configured in the top of source electrode line 13 by special resin 16 here.Thereby, unavoidably between pixel capacitors 11 and source electrode line 13, produce stray capacitance 15.

Respectively the source electrode line 13 of relevant pixel capacitors being supplied with shows signal with other pixel capacitors adjacent with this pixel capacitors supplied with between the source electrode line 13 that shows signal uses, form this stray capacitance 15, so to 2 capacitive coupling of a pixel capacitors formation.

In the above-mentioned active matrix type display, for example do not exist under the situation of stray capacitance 15 because of the planar structure (non-SHA) of not having above-mentioned spatial structure, only when gate line 14 conductings (ON), the voltage of source electrode line 13 is added to pixel capacitors 11, during gate line 14 blocking-up (OFF) this electric charge was kept for 1 frame period.Yet, producing under the capacity coupled situation that stray capacitance 15 causes, the electric charge that pixel capacitors 11 keeps is by stray capacitance 15, or leaks or added, and becomes instability.This factor forms and crosstalks, and becomes the problem that picture quality reduces.

Figure 13 illustrates the spectral characteristic of general color filter, and is as shown in the drawing, and each primary colors of the transmissivity of color filter is overlapping, and influence shows the excitation of look.This influence that shows look is caused by the wavelength dependency of light transmission etc., but also cause, so can be described as optical crosstalk by optical considerations such as leak light from polaroid.

At this problem, for example patent documentation 1 discloses a kind of active array type LCD, this device makes guarded electrode extend along signal wire from the auxiliary capacitance line that intersects with signal wire, make a limit of guarded electrode overlapping with relevant pixel capacitors, allow another limit and adjacent image point electrode overlapping simultaneously, and make its overlap length L1, L2 difference, thus keep the equilibrium of the electric capacity between the signal wire of a pixel capacitors and its both sides, can prevent to crosstalk etc. shows disadvantage.

Patent documentation 2 discloses relates to the crosstalk correction device of complementary drive voltages (being added in the voltage on the liquid crystal) in the plasma addressed type display device of the diffusion of insulation course, to pixel G[n] produce output signal DC[n]=input signal SG[n]+correction signal H ((SG[n]-SR[n])+(SG[n]-SB[n])) line output of going forward side by side.

Patent documentation 1: the spy opens communique patent documentation 2 2000-No. 206560: the spy opens communique 2000-No. 321559

As mentioned above, each pixel capacitors 11 of active array type liquid crystal board between the source electrode line 13 of the source electrode line 13 of this pixel and adjacent image point, the capacitive coupling that exists stray capacitance to cause.This capacity coupled existence, the effective voltage that pixel capacitors 11 is kept changes, thereby generation is crosstalked.

The invention of patent documentation 1 is leaked the purpose that the look that causes shows disadvantage by eliminating light, only strengthen the overlapping width of occulter and pixel capacitors in the zone that produces the liquid crystal aligning defective, making crosstalks does not produce, thereby does not proofread and correct the influence of crosstalking that special neighbourhood pixel as described above causes.

And, the invention of patent documentation 1, the composition complexity of its liquid crystal board, thereby manufacturing process is miscellaneous, the projected cost meeting increases.Again owing to strengthen the overlapping width of occulter and pixel capacitors, the problem of bringing the liquid crystal board transmissivity to reduce.

The invention of patent documentation 2 is used and is paid close attention to pixel G[n to being positioned at] two adjacent sides' pixel R[n], B[n] input signal SR[n], SB[n], obtain this concern pixel G[n] output signal DG[n], and use crosstalk correction coefficient H, but patent documentation 2 is not put down in writing this crosstalk correction coefficient H basis of (with the crosstalk correction COEFFICIENT K) fully.

The invention of patent documentation 2 is to prevent to be input to the invention of crosstalking that the shows signal at 2 adjacent adjacent electrodes of the direction vertical with source electrode line causes to paying close attention to pixel capacitors, can not eliminate the problem of crosstalking that the direction beyond the direction vertical with source electrode line produces but exist.

For example, under the situation of the invention of patent documentation 2, there is following problem,, can not proofreaies and correct the influence of crosstalking on the time shaft that the shows signal that is input to other pixel capacitors produces promptly to after paying close attention to pixel capacitors input shows signal, to next time again in 1 frame period of future of input.

Under the situation of the invention of patent documentation 2, also there is the problem that to proofread and correct the influence that electricity that the shows signal that is input to other pixel capacitors that links to each other with the source electrode line electrode in the horizontal direction produces crosstalks to the concerned pixel electrode.

Therefore, also there is the problem that can not proofread and correct optical crosstalk in the invention of patent documentation 2.

And, in the invention of patent documentation 2, following problem is arranged, promptly only crosstalk correction coefficient H and the relation of crosstalk correction COEFFICIENT K satisfy H=K/ (1-3K) and the homochromy pixel signal level of neighbor identical (SR[n]=SR[n+1], SB[n]=SB[n-1]) time, can proofread and correct and crosstalk; When the pixel of concerned pixel ownership and the difference of neighbor are big, produce correction error (obeying the error of this difference).

The present invention finishes in view of live telecast as described above, its purpose be to provide a kind of not only with the vertical direction of the source electrode line of display device and also in the horizontal direction and crosstalking of producing between the pixel capacitors that links to each other of vergence direction and/or to 1 frame period of future after the relevant pixel input shows signal in produce crosstalk and wait and can both effectively be eliminated, thereby can make crosstalk elimination circuit, liquid crystal indicator and the display control method of accurate and high-quality image demonstration.

In addition, though its purpose is to provide a kind of wavelength dependency of the light transmission that has a color filter and the optical crosstalk that causes from leak light of polaroid etc. again, but the electricity of whole directions is crosstalked and optical crosstalk is eliminated simultaneously by the LUT corrected value of working out crosstalk elimination circuit according to the optical measurement result who takes this optical crosstalk into account, thereby can make crosstalk elimination circuit, liquid crystal indicator and display control method that accurate and high-quality image shows.

Summary of the invention

In order to achieve the above object, the 1st technological means is a kind of crosstalk elimination circuit, the shows signal that is input to each pixel capacitors that liquid crystal board has by correction is eliminated crosstalking of the liquid crystal indicator that uses this liquid crystal board, this crosstalk elimination circuit has the shows signal and shows signal at the adjacent adjacent image point of the certain orientation vertical with the source electrode line of the pixel of this calibration object of the pixel of input calibration object, and the LUT of the correction signal used of the shows signal of the pixel of this calibration object of output calibration; And the adjacent image point used of the shows signal of the correction adjacent image point adjacent with calibration object is proofreaied and correct and is used LUT, this adjacent image point is proofreaied and correct with LUT and is used the correcting value data that extracts this adjacent image point in the shows signal of the shows signal of the adjacent adjacent adjacent image point of the direction vertical with the source electrode line of adjacent image point and adjacent image point, export as the adjacent image point correction signal, and the LUT input of the calibration object pixel being made correction usefulness uses adjacent image point to proofread and correct with the shows signal of the adjacent image point after the signal correction of LUT output and the shows signal of calibration object pixel, extracts the correction data of this calibration object pixel.

By like this, proofread and correct the shows signal that is input to the concerned pixel electrode according to the corrected value that extracts with LUT, can eliminate the influence of crosstalking that produces between the pixel capacitors of liquid crystal board, carry out high quality graphic and show.Owing to use LUT to extract the crosstalk correction value, therefore with accurately proofread and correct differently under described like that can only the be identical specified conditions of above-mentioned patent documentation for example 2 in the homochromy pixel signal level that neighbor comprises, can both carry out crosstalk correction accurately under what conditions.

Here, amount of crosstalk is generally crosstalked and the magnitude relationship of the shows signal level of the adjacent image point of the pixel of effect correction object changes with producing according to the shows signal level of the pixel of calibration object, but being changed at this moment is non-linear, thereby by using LUT, treatment effeciency is improved, be expected it and bring cost to reduce.

Again, in crosstalk correction, if the stream of crosstalking from the right-hand member of drawing horizontal direction to left end, then need to proofread and correct in the relay mode successively from the pixel of drawing right-hand member.Yet difficult work of the method handled in real time, and be impracticable, so by as indicated above, carry out of the correction of adjacent adjacent image point, and then the adjacent image point after proofreading and correct can be the same good crosstalk correction of precision and relay mode to the correction of calibration object pixel to adjacent image point.

The 2nd technological means is the crosstalk elimination circuit described in the 1st technological means, wherein, compares at interval with the signal level of setting correcting value data among the LUT that the calibration object pixel is used, adjacent image point is proofreaied and correct set for thicker with the signal level of setting correcting value data among the LUT.

When as the 1st technological means, making LUT be 2 level structures, need 2 times LUT, it is big that circuit scale becomes, but carry out the adjacent image point timing, corrected value does not need such strictness, thus can high-ranking officers the 1st grade of LUT using of positive adjacent image point to set the 2nd grade of LUT that uses than calibration object pixel for thick.Like this, can suppress circuit scale and become big disadvantage.

The 3rd technological means is the crosstalk elimination circuit described in the 1st technological means, wherein, wide with respect to the level that the signal level of the shows signal that is input to each pixel capacitors can be got, set for the interval of setting the signal of correcting value data among the LUT thicker with the wide scale of level of regulation.

Wide by the level that can get with respect to the signal level of the shows signal that is input to each pixel capacitors like this, with the wide scale of level of regulation the interval of setting the signal level of correcting value data among the LUT is set for slightlyer, can constitute the LUT that reduces circuit scale.

The 4th technological means is the crosstalk elimination circuit described in the 3rd technological means, wherein, from LUT extract with the signal level of setting correcting value data between the corresponding correcting value data of signal level the time, by to making linear interpolation between the signal level, extraction is as the correcting value data of purpose.

When using the such LUT of the 3rd technological means, wide the comparing of level of estimating and can get to the shows signal level of each pixel, correction accuracy reduces.In order to prevent that this correction accuracy from reducing, the corrected value of setting between the thick level is made linear interpolation, thereby can make loyal crosstalk correction.

The 5th technological means is the described crosstalk elimination circuit of arbitrary technological means in the 4th technological means, wherein, it is that omit in 0 zone that LUT is compiled into correcting value data that the signal level with the signal level of calibration object pixel and adjacent image point extracts, be 0 signal level and set for when carrying out described linear interpolation between the signal level adjacent at correcting value data with this signal level, carry out linear interpolation between correcting value data by setting adjacent signal level for and the predetermined fixed correction Value Data 0, extract correcting value data as purpose.

The 4th technological means is like that by making linear interpolation to the corrected value between the level of setting among the LUT, extraction is during as the correcting value data of purpose, if it is wide with for example 8 class intervals formation LUT to the level that the shows signal level corresponding with each pixel can be got, then can only deposit 32 grades of corrected values on the LUT, can not carry out interpolation with final stage.Therefore, as indicated above, by in advance to the most last data setting fixed value, can and fixed value between carry out interpolation, needn't constitute a plurality of tables that interpolation is used.

The 6th technological means is the crosstalk elimination circuit described in the 3rd technological means, wherein, compares with the signal level of adjacent image point, and the signal level of the pixel of calibration object is set the interval of setting the signal of correcting value data among the described LUT with thinner interval.

By comparing with the signal level of adjacent image point like this, the signal level of the pixel of calibration object is set the interval of setting the signal level of correcting value data among the LUT with thinner interval, can reduce the capacity scale of LUT, can also do more simultaneously and crosstalk correction accurately.

The 7th technological means is the crosstalk elimination circuit described in the 1st technological means, and wherein, each of each primary colors of RGB is provided with described LUT, and can set the corrected value of this LUT of all kinds respectively.That is, amount of crosstalk is different on the pixel capacitors of each primary colors, so independently set correction data by each primary colors, can make loyal crosstalk correction.And optical crosstalk is also different in each primary colors, so by the independent respectively correction data of setting of each primary colors, can make loyal crosstalk correction.

The 8th technological means is a kind of liquid crystal indicator, has the described crosstalk elimination circuit of arbitrary technological means in the 1st to the 7th technological means.

Owing to have above-mentioned crosstalk elimination circuit, can realize to do the liquid crystal indicator of crosstalk correction accurately.

The 9th technological means is a kind of liquid crystal indicator, use forms rectangular active array type liquid crystal board with a plurality of pixel capacitors, by relevant pixel capacitors being applied voltage and this electric charge being kept for 1 frame period, color display, wherein, has the correcting unit of proofreading and correct the shows signal that is input to each pixel capacitors, this correcting unit is proofreaied and correct the shows signal that be input to relevant pixel capacitors, the display brightness that makes relevant pixel is with respect to the former display brightness that should show, aberration Δ E is smaller or equal to 6.5, and is irrelevant with the shows signal of the pixel capacitors that is input to whole screen.

About the potential change of the source electrode line of adjacent image point electrode adjacent with the source electrode line of relevant pixel capacitors on the source electrode line of pixel capacitors and the vertical direction changes the quantity of electric charge that is added in relevant pixel capacitors, crosstalk thereby produce, so by monitoring the shows signal of importing along in the continuous pixel capacitors of each source electrode line of whole screen, the shows signal that should be input to relevant pixel capacitors is proofreaied and correct, can eliminate more exactly and crosstalk, can realize that the higher image of picture quality shows.

The 10th technological means is the liquid crystal indicator described in the 9th technological means, wherein, described correcting unit uses the shows signal and the shows signal that should be input to relevant pixel capacitors that be input to along the continuous pixel capacitors of each source electrode line, produces the correction signal to the shows signal that should be input to relevant pixel capacitors.

Like this, the display brightness intensity of variation that the shows signal that consideration should be input to the pixel capacitors that links to each other along each source electrode line of whole screen and the shows signal that should be input to relevant pixel capacitors make relevant pixel capacitors how, or the relation of the shows signal level of considering at this moment should to be input to relevant pixel capacitors and the shows signal level that should be input to the pixel capacitors that links to each other along each source electrode line, setting up derives arithmetic expression or the LUT that the crosstalk correction amount is used, derive correction signal from the shows signal that should be input to relevant pixel capacitors and the shows signal that should be input to the pixel capacitors that links to each other along each source electrode line, thereby can carry out crosstalk correction more accurately relevant pixel capacitors.

The 11st technological means is the liquid crystal indicator described in the 9th technological means, wherein, correcting unit is proofreaied and correct the shows signal that be input to relevant pixel capacitors during after the input shows signal on the relevant pixel capacitors, the display brightness that makes relevant pixel is with respect to the former display brightness that should show, aberration Δ E is smaller or equal to 6.5, and is irrelevant with the shows signal that is input to relevant pixel capacitors pixel capacitors in addition.

To relevant pixel capacitors apply behind the voltage during in, the variation of supplying with the source electrode line current potential of other pixel capacitors changes the quantity of electric charge that applies on the relevant pixel capacitors behind the voltage, crosstalk thereby produce, so by monitoring to being input to the shows signal of other pixel capacitors in during after the relevant pixel capacitors input shows signal, the shows signal that should be input to relevant pixel capacitors is proofreaied and correct, can eliminate more exactly and crosstalk, can realize that the higher image of picture quality shows.

The 12nd technological means is the liquid crystal indicator described in the 10th technological means, wherein, correcting unit the timing that should import shows signal on the relevant pixel capacitors and subsequent during, with the shows signal and the shows signal that should be input to relevant pixel capacitors that should be input to relevant pixel capacitors pixel capacitors in addition, produce correction signal to the shows signal that should be input to relevant pixel capacitors.

Like this, consider should to import on the relevant pixel capacitors shows signal timing and subsequent during in be input to other pixel capacitors shows signal make relevant pixel capacitors the display brightness intensity of variation how, or the relation of considering at this moment to be input to the shows signal level of relevant pixel capacitors and should being input to the shows signal level of other pixel capacitors, setting up derives arithmetic expression or the LUT that the crosstalk correction amount is used, derive correction signal from the shows signal that should be input to relevant pixel capacitors and the shows signal that should be input to other pixel capacitors, thereby can carry out crosstalk correction more accurately relevant pixel capacitors.

The 13rd technological means is the liquid crystal indicator described in the 9th technological means, wherein, described correcting unit is to during before the relevant pixel capacitors input shows signal, correction should be input to the shows signal of relevant pixel capacitors, the display brightness that makes relevant pixel is with respect to the former display brightness that should show, aberration Δ E is smaller or equal to 6.5, and is irrelevant with the shows signal that is input to relevant pixel capacitors pixel capacitors in addition.

By being taken as this composition, compare with the 11st technological means, can not carry out complete crosstalk correction, but the input shows signal in during before the pixel capacitors input shows signal be proofreaied and correct by using, can reduce frame memory, circuit scale is reduced.

Here, for example among TV (television receiver) etc., the high band component of filtering input picture in advance, even to do in the picture identical in fact catch also no problem, and the picture signal difference of interframe little (interframe is relevant big), especially in the human vision property, colour difference sensitivity is low, so on the use pixel capacitors input before the shows signal during input signal replace in the 11st technological means on the relevant pixel capacitors after the input shows signal during in the shows signal of input, also no problem in the practicality.

Thereby, can realize not only reducing circuit scale but obtain the 11st technological means like that on relevant pixel capacitors after the input shows signal during in the use shows signal that is input to other pixel capacitors carry out the liquid crystal indicator of the identical in fact calibration result of timing.

The 14th technological means is the liquid crystal indicator described in the 10th technological means, wherein, correcting unit the timing that should import shows signal on the relevant pixel capacitors and preceding during, with the shows signal and the shows signal that should be input to relevant pixel capacitors that are input to relevant pixel capacitors pixel capacitors in addition, produce correction signal to the shows signal that should be input to relevant pixel capacitors.

Like this, consider should to import on the relevant pixel capacitors shows signal timing and preceding during in be input to other pixel capacitors shows signal make relevant pixel capacitors the display brightness intensity of variation how, or the relation of considering at this moment to be input to the shows signal level of relevant pixel capacitors and being input to the shows signal level of other pixel capacitors, setting up derives arithmetic expression or the LUT that the crosstalk correction amount is used, derive correction signal from the shows signal that should be input to relevant pixel capacitors and the shows signal that is input to other pixel capacitors, thereby can carry out crosstalk correction more accurately relevant pixel capacitors.

The 15th technological means is a kind of crosstalk elimination circuit, be used for liquid crystal indicator, this liquid crystal indicator uses a plurality of pixel capacitors is formed rectangular active array type liquid crystal board, by relevant pixel capacitors being applied voltage and this electric charge being kept for 1 frame period, color display, wherein, has the correcting unit of proofreading and correct the shows signal that is input to each pixel capacitors, this correcting unit is proofreaied and correct the shows signal that be input to relevant pixel capacitors, make the display brightness of relevant pixel with respect to the former display brightness that should show, aberration Δ E is smaller or equal to 6.5, and is irrelevant with the shows signal of the pixel capacitors that is input to whole screen.

About the potential change of the source electrode line of the source electrode line of pixel capacitors and the adjacent image point electrode adjacent in vertical direction with the source electrode line of relevant pixel capacitors changes the quantity of electric charge that is added in relevant pixel capacitors, crosstalk thereby produce, so by monitoring the shows signal of importing along in the continuous pixel capacitors of each source electrode line of whole screen, the shows signal that should be input to relevant pixel capacitors is proofreaied and correct, can eliminate more exactly and crosstalk, can realize that the higher image of picture quality shows.

The 16th technological means is the crosstalk elimination circuit described in the 15th technology, wherein, correcting unit uses the shows signal and the shows signal that should be input to relevant pixel capacitors that be input to along the continuous pixel capacitors of each source electrode line, produces the correction signal to the shows signal that should be input to relevant pixel capacitors.

Like this, how consideration should be input to display brightness intensity of variation that relevant pixel capacitors makes relevant pixel capacitors in the shows signal of the pixel capacitors that links to each other along each source electrode line of whole screen and the shows signal that should be input to relevant pixel capacitors, or the relation of the shows signal level of considering at this moment should to be input to relevant pixel capacitors and the shows signal level that should be input to the pixel capacitors that links to each other along each source electrode line, setting up derives arithmetic expression or the LUT that the crosstalk correction amount is used, derive correction signal from the shows signal that should be input to relevant pixel capacitors and the shows signal that should be input to the pixel capacitors that links to each other along each source electrode line, thereby can carry out crosstalk correction more accurately relevant pixel capacitors.

The 17th technological means is the crosstalk elimination circuit described in the 16th technological means, wherein, correcting unit is proofreaied and correct the shows signal that be input to relevant pixel capacitors during after the input shows signal on the relevant pixel capacitors, make the display brightness of relevant pixel with respect to the former display brightness that should show, aberration Δ E is smaller or equal to 6.5, and is irrelevant with the shows signal that is input to relevant pixel capacitors pixel capacitors in addition.

The 18th technological means is the crosstalk elimination circuit described in the 16th technological means, wherein, correcting unit is imported shows signal on relevant pixel capacitors timing reaches thereafter, with the shows signal and the shows signal that should be input to relevant pixel capacitors that should be input to relevant pixel capacitors pixel capacitors in addition, produce correction signal to the shows signal that should be input to relevant pixel capacitors.

Like this, consider should to import on the relevant pixel capacitors shows signal timing and subsequent during in should be input to other pixel capacitors shows signal make relevant pixel capacitors the display brightness intensity of variation how, or the relation of considering at this moment to be input to the shows signal level of relevant pixel capacitors and should being input to the shows signal level of other pixel capacitors, setting up derives arithmetic expression or the LUT that the crosstalk correction amount is used, derive correction signal from the shows signal that should be input to relevant pixel capacitors and the shows signal that should be input to other pixel capacitors, thereby can carry out crosstalk correction more accurately relevant pixel capacitors.

The 19th technological means is the crosstalk elimination circuit described in the 15th, wherein, correcting unit is to during before the relevant pixel capacitors input shows signal, correction should be input to the shows signal of relevant pixel capacitors, make the display brightness of relevant pixel with respect to the former display brightness that should show, aberration Δ E is smaller or equal to 6.5, and is irrelevant with the shows signal that is input to relevant pixel capacitors pixel capacitors in addition.

By being taken as this composition, compare with the 17th technological means, can not carry out complete crosstalk correction, but the input shows signal in during before the pixel capacitors input shows signal be proofreaied and correct by using, can reduce frame memory, circuit scale is reduced.

Here, for example among TV (television receiver) etc., the high band component of filtering input picture in advance, even to do in the picture identical in fact catch also no problem, and the picture signal difference of interframe little (interframe is relevant big), especially in the human vision property, colour difference sensitivity is low, so on the use pixel capacitors input before the shows signal during input signal replace in the 17th technological means on the relevant pixel capacitors after the input shows signal during in the shows signal of input, also no problem in the practicality.

Thereby, can realize not only reducing circuit scale but obtain the 17th technological means like that on relevant pixel capacitors after the input shows signal during in the use shows signal that is input to other pixel capacitors carry out the crosstalk elimination circuit of the identical in fact calibration result of timing.

The 20th technological means is the crosstalk elimination circuit described in the 16th, wherein, correcting unit is imported the timing of shows signal and preceding on relevant pixel capacitors, with the shows signal and the shows signal that should be input to relevant pixel capacitors that should be input to relevant pixel capacitors pixel capacitors in addition, produce correction signal to the shows signal that should be input to relevant pixel capacitors.

The 21st technological means is a kind of display control method, be used for liquid crystal indicator, this liquid crystal indicator uses a plurality of pixel capacitors is formed rectangular active array type liquid crystal board, by relevant pixel capacitors being applied voltage and this electric charge being kept for 1 frame period, color display, wherein comprise following steps:, has the aligning step of proofreading and correct the shows signal that is input to each pixel capacitors, this aligning step is proofreaied and correct the shows signal that be input to relevant pixel capacitors, make the display brightness of relevant pixel with respect to the former display brightness that should show, aberration Δ E is smaller or equal to 6.5, and is irrelevant with the shows signal of the pixel capacitors that is input to whole screen.

The 22nd technological means is the display control method described in the 21st technological means, wherein, aligning step uses the shows signal and the shows signal that should be input to relevant pixel capacitors that be input to along the continuous pixel capacitors of each source electrode line, produces the correction signal to the shows signal that should be input to relevant pixel capacitors.

The 23rd technological means is the display control method described in the 21st technological means, wherein, aligning step is proofreaied and correct the shows signal that be input to relevant pixel capacitors during after the input shows signal on the relevant pixel capacitors, make the display brightness of relevant pixel with respect to the former display brightness that should show, aberration Δ E is smaller or equal to 6.5, and is irrelevant with the shows signal that is input to relevant pixel capacitors pixel capacitors in addition.

The 24th technological means is the display control method described in the 22nd technological means, wherein, correcting unit the timing that should import shows signal on the relevant pixel capacitors and subsequent during, with the shows signal and the shows signal that should be input to relevant pixel capacitors that should be input to relevant pixel capacitors pixel capacitors in addition, produce correction signal to the shows signal that should be input to relevant pixel capacitors.

The 25th technological means is the display control method described in the 21st technological means, wherein, aligning step before the relevant pixel capacitors of reply input shows signal during, correction should be input to the shows signal of relevant pixel capacitors, make the display brightness of relevant pixel with respect to the former display brightness that should show, aberration Δ E is smaller or equal to 6.5, and is irrelevant with the shows signal that is input to relevant pixel capacitors pixel capacitors in addition.

By being taken as this composition, compare with the 23rd technological means, can not carry out complete crosstalk correction, but the input shows signal in during before the pixel capacitors input shows signal be proofreaied and correct by using, can reduce frame memory, circuit scale is reduced.

Here, for example among TV (television receiver) etc., the high band component of filtering input picture in advance, even to do in the picture identical in fact catch also no problem, and the picture signal difference of interframe little (interframe is relevant big), especially in the human vision property, colour difference sensitivity is low, so on the use pixel capacitors input before the shows signal during input signal replace in the 23rd technological means on the relevant pixel capacitors after the input shows signal during in the shows signal of input, also no problem in the practicality.

Thereby, can realize not only reducing circuit scale but obtain the 23rd technological means like that on relevant pixel capacitors after the input shows signal during in the use shows signal that is input to other pixel capacitors carry out the display control method of the identical in fact calibration result of timing.

The 26th technological means is the display control method described in the 22nd technological means, wherein, correcting unit is imported the timing of shows signal and preceding on relevant pixel capacitors, with the shows signal and the shows signal that should be input to relevant pixel capacitors that should be input to relevant pixel capacitors pixel capacitors in addition, produce correction signal to the shows signal that should be input to relevant pixel capacitors.，

Like this, consider should to import on the relevant pixel capacitors shows signal timing and preceding during in be input to other pixel capacitors shows signal make relevant pixel capacitors the display brightness intensity of variation how, or the relation of considering at this moment to be input to the shows signal level of relevant pixel capacitors and should being input to the shows signal level of other pixel capacitors, setting up derives arithmetic expression or the LUT that the crosstalk correction amount is used, derive correction signal from the shows signal that should be input to relevant pixel capacitors and the shows signal that is input to other pixel capacitors, thereby can carry out crosstalk correction more accurately relevant pixel capacitors.

The 27th technological means is the display control method described in the 26th technological means, wherein, in 1 frame period in the past of aligning step before the timing of the relevant pixel capacitors input of reply shows signal, according to the shows signal that should be input to other pixel capacitors with should be input to described relevant pixel capacitors and proofread and correct the shows signal that be input to described relevant pixel capacitors, produce correction signal to the shows signal that should be input to described relevant pixel capacitors.

Like this, in 1 frame period before consideration is imported relevant pixel capacitors, how the shows signal of importing on other pixel electrode makes degree that the display brightness of relevant pixel capacitors changes, or the relation of considering at this moment to be input to the shows signal level of relevant pixel capacitors and being input to the shows signal level of other pixel capacitors, setting up derives arithmetic expression or the LUT that the crosstalk correction amount is used, derive correction signal from the shows signal that should be input to relevant pixel capacitors and the shows signal that is input to other pixel capacitors, thereby can carry out crosstalk correction more accurately relevant pixel capacitors.

The 28th technological means is a kind of display control method, be used for liquid crystal indicator, this liquid crystal indicator uses a plurality of pixel capacitors is formed rectangular active array type liquid crystal board, by relevant pixel capacitors being applied voltage and this electric charge being kept for 1 frame period, color display, wherein, has the aligning step of proofreading and correct the shows signal that is input to each pixel capacitors, this aligning step is proofreaied and correct the shows signal that be input to relevant pixel capacitors, make that the display brightness of relevant pixel capacitors is constant in fact, irrelevant with the shows signal that is input to along other continuous pixel capacitors of the source electrode line of relevant pixel capacitors.

In 1 frame period of future that applies again after relevant pixel capacitors applied voltage, to next time, the variation of supplying with the source electrode line current potential of other pixel electrode changes the quantity of electric charge that applies on the relevant pixel capacitors behind the voltage, crosstalk thereby produce, so be input to along the shows signal of other continuous pixel electrode of the source electrode line of relevant pixel capacitors by supervision, the shows signal that should be input to relevant pixel capacitors is proofreaied and correct, can eliminate more exactly and crosstalk, can realize that the higher image of picture quality shows.

The 29th technological means is the display control method described in the 28th technological means, wherein, aligning step produces the correction signal to the shows signal that should be input to relevant pixel capacitors according to the shows signal and the shows signal that should be input to described relevant pixel capacitors along other continuous electrode of source electrode line that should be input to relevant pixel capacitors.

Like this, how the shows signal of importing on other pixel electrode that consideration links to each other along the source electrode line of relevant pixel capacitors makes degree that the display brightness of relevant pixel capacitors changes, or the relation of the shows signal level of considering at this moment to be input to relevant pixel capacitors and the shows signal level that is input to other pixel capacitors that links to each other along the source electrode line of relevant pixel capacitors, setting up derives arithmetic expression or the LUT that the crosstalk correction amount is used, derive correction signal from the shows signal that should be input to relevant pixel capacitors and the shows signal that is input to other pixel capacitors that links to each other along the source electrode line of relevant pixel capacitors, thereby can carry out crosstalk correction more accurately relevant pixel capacitors.

The 30th technological means is the display control method described in the 28th technological means, wherein, aligning step is according to the shows signal that should be input to other electrode that links to each other along the source electrode line of relevant pixel capacitors, the shows signal that should be input to the pixel capacitors that links to each other along the source electrode line at the adjacent image point electrode adjacent with the vertical direction of described relevant pixel capacitors and the shows signal that should be input to described relevant pixel capacitors, produces being input to the correction signal of described shows signal about pixel capacitors.

Like this, consideration is along the shows signal of importing on other continuous pixel electrode of the source electrode line of relevant pixel capacitors, and how the shows signal of importing on other pixel electrode that links to each other along the source electrode line of the adjacent image point electrode adjacent in vertical direction with the source electrode line of relevant pixel capacitors makes degree that the display brightness of relevant pixel capacitors changes, or at this moment consideration is input to the shows signal level of relevant pixel capacitors, be input to the shows signal level of other pixel capacitors that links to each other along the source electrode line of relevant pixel capacitors and be input to the relation of the shows signal level of other pixel electrode that the source electrode line of the edge adjacent image point electrode adjacent in vertical direction with the source electrode line of relevant pixel capacitors links to each other, setting up derives arithmetic expression or the LUT that the crosstalk correction amount is used, from being input to the shows signal of relevant pixel capacitors, the shows signal derivation of other pixel capacitors of shows signal that is input to the shows signal of other pixel capacitors that links to each other along the source electrode line of relevant pixel capacitors and is input to other pixel electrode that links to each other along the source electrode line of the adjacent image point electrode adjacent in vertical direction with the source electrode line of relevant pixel capacitors is to the correction signal of relevant pixel capacitors, thereby can carry out crosstalk correction more accurately.

The 31st technological means is the display control method described in the 24th technological means, wherein, in 1 frame period in the future of the timing that aligning step after the relevant pixel capacitors of reply is imported the timing of shows signal, extremely should be imported again next time, according to being input to described shows signal and the shows signal that should be input to described relevant pixel capacitors, produce correction signal to the shows signal that should be input to described relevant pixel capacitors about the continuous pixel capacitors of the source electrode line of pixel capacitors.

Like this, consideration is after input shows signal on the relevant pixel capacitors, to 1 frame period of future of next input again, how the shows signal of importing on other pixel electrode that links to each other along the source electrode line of relevant pixel capacitors makes degree that the display brightness of relevant pixel capacitors changes, or the relation of the shows signal level of considering at this moment to be input to relevant pixel capacitors and the shows signal level that is input to other pixel capacitors that links to each other along the source electrode line of relevant pixel capacitors, setting up derives arithmetic expression or the LUT that the crosstalk correction amount is used, derive correction signal from the shows signal that should be input to relevant pixel capacitors and the shows signal that is input to other pixel capacitors that links to each other along the source electrode line of relevant pixel capacitors, thereby can carry out crosstalk correction more accurately relevant pixel capacitors.

The 32nd technological means is the display control method described in the 26th technological means, wherein, in 1 frame period in the past of aligning step before the timing of the relevant pixel capacitors input of reply shows signal, according to being input to, produce correction signal to the shows signal that should be input to described relevant pixel capacitors along described shows signal and the shows signal that should be input to described relevant pixel capacitors about the continuous pixel capacitors of the source electrode line of pixel capacitors.

Like this, consideration was imported on relevant pixel capacitors in 1 frame period of past before the shows signal, how the shows signal of importing on other pixel electrode that links to each other along the source electrode line of relevant pixel capacitors makes degree that the display brightness of relevant pixel capacitors changes, or the relation of the shows signal level of considering at this moment to be input to relevant pixel capacitors and the shows signal level that is input to other pixel capacitors that links to each other along the source electrode line of relevant pixel capacitors, setting up derives arithmetic expression or the LUT that the crosstalk correction amount is used, derive correction signal from the shows signal that should be input to relevant pixel capacitors and the shows signal that is input to other pixel capacitors that links to each other along the source electrode line of relevant pixel capacitors, thereby can carry out crosstalk correction more accurately relevant pixel capacitors.

According to the present invention, can effectively eliminate in the active array type LCD, be input in crosstalking of between level, vertical and pixel capacitors that vergence direction links to each other, producing of source electrode line, to 1 frame period of future after the concerned pixel electrode input shows signal that the influence of the shows signal of other pixel electrode causes crosstalk, optical crosstalk etc., can carry out accurate and high-quality image and show.

Among the present invention, can obtain the constant in fact correction signal of display brightness of concerned pixel signal, with irrelevant, thereby can proofread and correct in real time and comprise influencing each other and surmount influence between the pixel of pixel boundary each primary colors in the pixel of crosstalking of whole image (each pixel) to the shows signal level of other pixel electrode input.Especially in the liquid crystal board of SHA structure, high image quality can be reached again, high quality graphic can be provided again based on the superelevation aperture opening ratio.

And, can eliminate the circuit of crosstalking by constituting with easy composition, can realize the raising of the highly integrated and processing speed of the LSI of crosstalk elimination circuit enforcement and the cost reduction that they bring.Thus, also be expected the low consumption electrification of LSI driving power.

Description of drawings

Fig. 1 is the figure that explanation one crosstalk elimination circuit embodiment of the present invention is used.

Fig. 2 is the composition example and the figure that influences usefulness that crosstalks at this moment of pixels illustrated.

Fig. 3 is the figure of the composition example usefulness of the LUT that uses of explanation one the present invention.

Fig. 4 is the figure of the composition example usefulness of the LUT that uses of another the present invention of explanation.

Fig. 5 illustrates a routine transverse axis to be taken as the figure that this pixel level, the longitudinal axis are taken as the curve of corrected value.

Fig. 6 illustrates a routine transverse axis to be taken as the figure that adjacent image point level, the longitudinal axis are taken as the curve of corrected value.

Fig. 7 is the figure that the crucial portion composition of the LUT that the processing usefulness of considering adjacent adjacent image point is described is shown.

Fig. 8 is the figure that another crosstalk elimination circuit embodiment of the present invention of explanation is used.

Fig. 9 is the figure that another crosstalk elimination circuit embodiment of the present invention of explanation is used.

Figure 10 is the figure that another crosstalk elimination circuit embodiment of the present invention of explanation is used.

Figure 11 is the figure that level with the degree of general vision of aberration Δ E are shown.

Figure 12 is the figure of composition example usefulness of the pixel capacitors of the explanation TFT LCD panel of utilizing the SHA technology.

Figure 13 is the figure that the spectral characteristic of general color filter is shown.

Embodiment

As indicated above, for crosstalking, pay close attention to the affected pixel of pixel and be and pay close attention to the pixel that has and pay close attention to capacity coupled source electrode line between the pixel capacitors in the pixel neighboring pixels, thereby to consider the mode of this adjacent image point at least, extract corrected value by LUT (look-up table), according to this corrected value, proofread and correct and be input to the shows signal of paying close attention to pixel.Utilize this processing, the influence of compensate for crosstalk can be carried out high quality graphic and show.

Fig. 1 is the figure that explanation one crosstalk elimination circuit embodiment of the present invention is used, and the key component of liquid crystal indicator is shown with block diagram.

As shown in Figure 1, the liquid crystal indicator of present embodiment, in order to proofread and correct the shows signal of RGB, the pixel that each calibration object is set obtains the adjacent image point acquisition cuicuit 1 of shows signal of adjacent image point and the LUT2 of correction signal of shows signal of each pixel that uses the shows signal output calibration object of the pixel that obtains in the adjacent image point acquisition cuicuit 1, as crosstalk elimination circuit.

LUT2 is compiled into the correction signal that influences usefulness that can give the shows signal of importing on another adjacent image point electrode of shows signal output calibration of importing on the pixel capacitors, to eliminate above-mentioned crosstalking.The concrete example of this LUT2 is set forth in the back.

The correction signal of the shows signal of each pixel and LUT2 output adduction is mutually proofreaied and correct.The shows signal of each pixel after this correction is imported into timing control part (TC) 3.In the timing control part 3, the vertical and horizontal-drive signal S according to applying from the outside outputs to source electrode driver 4 with shows signal, also will output to gate drivers 5 to the sweep signal that TFT scans usefulness simultaneously.

The composition of TFT-LCD6 such as above-mentioned shown in Figure 12, the gate line 14 that source electrode line 13 that the shows signal of configuration transfer source driver 4 outputs is used and the sweep signal that transmits gate drivers 5 outputs are used.

Below, specify the effect of the LUT of present embodiment.Fig. 2 is the composition example and the figure that influences usefulness that crosstalks at this moment of pixels illustrated.As indicated above, the illuminating state of the adjacent image point that is meant the capacitive coupling side that forms stray capacitance 15 of crosstalking makes the phenomenon of the influenced and output of this pixel and originally different gray scale.For example, during banded pixel shown in Figure 2 was formed, the R pixel of this pixel (R sub-pixel) was subjected to the influence from adjacent G pixel, makes grey scale change.Equally, the G pixel is subjected to the influence from the B pixel, and the B pixel is subjected to the influence from adjacent image point R '.

In order to proofread and correct this influence, as shown in Figure 1, carry out the correction of the output signal level of R according to the input shows signal level of R and G by LUT2, equally, also proofread and correct the output shows signal level of G, the output shows signal level of proofreading and correct B according to the input shows signal level of the R ' of B and adjacent image point according to the input shows signal level of G and B.

Fig. 3 is the figure that the composition example of the LUT that a present embodiment uses is shown.Correction is crosstalked when influencing, and according to the input shows signal level to this pixel (pixel of calibration object is promptly paid close attention to pixel) and adjacent image point thereof, the corrected value of this pixel changes.Therefore, use 2 dimension LUT, the decision corrected value according to shows signal level corresponding and the pairing shows signal level of adjacent image point reference address thereof with this pixel.

For example, when handling shows signal to each pixel with 8 (256 gray level), establishment LUT as shown in Figure 3.Here, in the example for example shown in Figure 3, the shows signal input stage of this pixel R is that the shows signal input stage of " 4 ", adjacent image point G is under the situation of " 4 ", obtains corrected value "-2 " by LUT.Then, the corrected value of obtaining "-2 " is added to the input stage of R, and with the shows signal output stage of its result as R.The shows signal of R after proofreading and correct with the corrected value of LUT output is supplied with the pixel capacitors of this pixel by timing control part 3.

Can described LUT independently be set each primary colors of RGB, and each RGB primary colors is set different separately institutes corrected value.According to the optical measurement result of liquid crystal board, work out the corrected value of each LUT in advance.Then, from the pixel of the end that is equivalent to display frame, each pixel carries out treatment for correcting successively, and the shows signal behind the output calibration, makes it be input to timing control part.

The LUT of these each primary colors can be arranged on the inside or the periphery of liquid crystal indicator.For example, can be with the storage unit of semiconductor memories such as ROM, RAM as storage LUT.

About being subjected to the pixel orientation of cross talk effects, this directivity is different with the position relation of TFT because of pixel capacitors.As shown in figure 12, when on the source electrode line 13 in left side, TFT12 being set, paying close attention to pixel (this pixel) and be subjected to the pixel cross talk effects on its right side with respect to pixel capacitors 11; Otherwise, when on the source electrode line 13 on right side, TFT12 being set, pay close attention to the pixel cross talk effects that pixel is subjected to its left side with respect to pixel capacitors.For so various pixel pattern of rows and columns,, can all adapt to by switching the wiring of adjacent image point acquisition cuicuit 1.

Fig. 4 is the figure that the LUT of another present embodiment application of explanation forms routine usefulness.Here, LUT shown in Figure 4 rationalization by reducing circuit scale and seeking to handle can be carried out at a high speed and practical shows signal is proofreaied and correct.

In the example of Fig. 3, to set 256 grades (=8) for 1 class interval to the shows signal level of this pixel and adjacent image point, but here for example as shown in Figure 4, to be taken as 4 class intervals (64 grades=6) to the shows signal level of this pixel, to be taken as 8 class intervals (32 grades=5) to the shows signal of adjacent image point, thereby form 2 dimension LUT.By like this interval of setting the signal level of corrected value among the LUT being set for slightly, reduce circuit scale, can constitute the LUT that simplifies.

That is to say,, with the wide scale of level of regulation the interval of setting the signal level of corrected value among the LUT is set for slightly, thereby can be constituted the LUT that reduces circuit scale here with respect to the level wide (being 256 grades=8 under this situation) that can get the shows signal level of each pixel.

When using a distance level value as described above to set thicker LUT for, compare, estimate that correction accuracy reduces with the LUT of above-mentioned Fig. 3.Therefore, for anti-correction accuracy here reduces, the corrected value of setting between the thicker level is reduced linear interpolation, thereby can do to proofread and correct more accurately.For example, in the example of LUT shown in Figure 4, with 4 class intervals with the shows signal level of this pixel be set at 0,4,8,12 ..., 248,252,256, with 8 class intervals with the shows signal level of adjacent image point be set at 0,8,16,24 ..., 248,256.

Here, when actual input shows signal level is (this pixel, adjacent image point)=(10,18), signal level to this pixel is " 10 ", thereby " 8 ", " 12 " of this pixel are elected as carry out the level that interpolation uses, and the signal level to adjacent image point is " 18 ", thereby " 16 ", " 24 " of adjacent image point is elected as carry out the level that interpolation uses.In view of the above, extract 4 numerical value (adding the interior numerical value of district A that netting twine is represented Fig. 4) " 7 ", " 8 ", " 9 ", " 10 " of carrying out interpolation and using from LUT.

Then, at first carry out the linear interpolation of LUT horizontal (horizontal direction).Here, at first from adjacent image point level " 7 " and " 9 " corresponding with this pixel level " 8 ", utilize linear interpolation to calculate level " 7.5 ", and then, utilize linear interpolation to calculate level " 8.5 " from adjacent image point level " 8 " and " 10 " corresponding with this pixel level " 12 ".

Then, carry out the linear interpolation of LUT vertical (vertical direction).At this moment, level " 7.5 ", " 8.5 " from above-mentioned laterally (horizontal direction) linear interpolation obtains utilize linear interpolation to calculate level " 8.0 ", and this value is used as corrected value.

Again, be taken as 10 by internal signal to major general's crosstalk elimination circuit, but not 8, make the value of the radix point back of above-mentioned linear interpolation also obtain reflection, thereby can do the higher interpolation of precision.

(interpolating method of LUT end)

When considering above-mentioned LUT shown in Figure 4, can realize LUT with the address of 5 of 6 * adjacent image points of this pixel by hardware.Yet, under the situation of this pixel 6 bit address, the last corrected value that can only deposit 64 grades of LUT, by 0,4,8 ..., when 252 mode is set level to leave for 4 class intervals from " 0 ", can not carry out the level " 252 " of least significant end and the interpolation between " 255 ".

Similarly, under the situation of adjacent image point 5 bit address, the last corrected value that can only deposit 32 grades of LUT, by 0,8,16 ..., when 248 mode is set level to leave for 8 class intervals from " 0 ", can not carry out the level " 248 " of least significant end and the interpolation between " 255 ".

Therefore, present embodiment determines under the situation of input signal level less than " 8 " of input signal level less than " 4 " or adjacent image point of this pixel, carries out the interpolation with fixed value " 0 ".

This is equivalent to add among Fig. 4 the part of the district B that netting twine represents, by not forming the part of this district B among the LUT, can work out the LUT that is set to the level 256 of least significant end with 64 grades (=6).

Under the above-mentioned situation, be used as correction reference when being " 0 " owing to the input stage with adjacent image point, when the input stage of adjacent image point was " 0 ", corrected value also was " 0 ".Therefore, can not form file B among the district B shown in Figure 4 among the LUT ₁Otherwise when being used as benchmark when supposing the input stage of adjacent image point for " 255 ", the pairing corrected value of adjacent image point input stage " 255 " of the right-hand member of Fig. 4 is " 0 ", does not form this file among the LUT.

Again, when the input stage of this pixel was " 0 ", the input stage of adjacent image point was what is not crosstalked.This is because in the normal black liquid crystal board, when the input stage of this pixel is " 0 ", be in the state of the complete dormancy of liquid crystal molecule, is not subjected to the influence of adjacent image point change.Therefore, when the input stage of this pixel was " 0 ", corrected value must be " 0 ".So, also can not form the line B among the district B shown in Figure 4 among the LUT ₂

Promptly, at this moment it is that omit in 0 zone that LUT is compiled into the corrected value that extracts with the level of the level of calibration object pixel and adjacent image point thereof, and corrected value is between the level of 0 level and adjacent setting thereof when carrying out linear interpolation, by carrying out linear interpolation between adjacent level and the predetermined fixed value 0, extraction is as the corrected value of purpose.

(the address ratio of this pixel of LUT and adjacent image point)

LUT need keep correction accuracy not only but also reduce its capacity as far as possible.Fig. 5 illustrates on the routine transverse axis to get the figure that gets the figure of corrected value on this pixel level, the longitudinal axis.As shown in Figure 5, the figure of getting this pixel level on the transverse axis rate of change that to be corrected value change the input signal level greatly and the many curves of flex point.Therefore, the level of setting corrected value among the LUT need be obtained carefully.

Fig. 6 illustrates the figure that gets the figure of district's corrected value on adjacent image point level, the longitudinal axis on the routine transverse axis.Opposite with above-mentioned Fig. 5, the figure of getting the adjacent image point level on the transverse axis is the curve that rate of change is little and flex point is few that corrected value changes the input signal level.Therefore, do not need and the level of setting corrected value to obtain so thin among the LUT.

According to The above results, the level of setting corrected value among the LUT can be taken as thin interval with the level of this pixel, and the level of adjacent image point is taken as thicker interval relatively.In the present embodiment, set the level of this pixel for each 64 grades, set the level of adjacent image point for each 32 grades, thereby form LUT.This LUT needs to change according to the measurement result of crosstalking the setting of level, but handover access mode is only at this moment made appropriate change, does not change the scale of LUT, as 128 * 16 (7 * 4), 32 * 64 (5 * 6) etc.

(2 grades of compositions of LUT)

In the crosstalk correction, strict, need the result after this pixel is proofreaied and correct according to adjacent image point to proofread and correct, also need the result after adjacent image point is proofreaied and correct according to adjacent adjacent image point to proofread and correct.That is, if the stream of crosstalking right-hand to left from the screen level direction then needs to proofread and correct in the relay mode successively from the pixel of the right-hand member of screen.Yet difficult work of the method handled in real time, and be impracticable.

Therefore, proofread and correct flexibly, LUT is made 2 grades, adopt correction result to proofread and correct the input signal of adjacent image point and proofread and correct the composition of the input signal of fair copy pixel as a result according to this according to adjacent adjacent image point in order to carry out practicality and precision.

For example, establish the input that has (RGB)=(64,64,255).This is grade pattern that changes at first that makes G.Therefore, at first carrying out the G level proofreaies and correct.Fig. 7 is the figure of the crucial portion of explanation LUT.In the case, when this pixel was taken as the G pixel, the input stage of this pixel (G) was " 64 ", and the input stage of adjacent image point (B) is " 255 ", thereby according to the LUT of Fig. 7, corrected value is "-21 ".Input stage " 64 " with this corrected value "-21 " is proofreaied and correct G obtains " 43 ", as the level of the G after proofreading and correct.

Then, the pixel G after proofreading and correct is used as adjacent image point, this pixel is taken as the R pixel, proofread and correct the level of R.At this moment the input stage of this pixel R is " 64 ", and according to the level " 43 " after the adjacent image point G correction, obtains corrected value "-7 ".Input stage " 64 " with the corrected value that obtains "-7 " fair copy pixel R obtains " 57 ", as the level of the R after proofreading and correct.

For example, non-above-mentioned such adjacent adjacent image point of considering carries out 1 grade of correction with the input stage of adjacent image point G to the input stage " 64 " of this pixel R, and then its corrected value is "-8 ", consider that the corrected value "-7 " of adjacent adjacent image point compares like that with above-mentioned, produce some differences.Therefore, by considering 2 grades of corrections of adjacent adjacent image point, can carry out than 1 grade of correction that correction accuracy is high.

Consider under the situation of relay mode, use the level of the right again adjacent input stage correction B of B pixel, but this result does not have influence on the correction result of R pixel, does not have the necessity that adopts the relay mode.

(simplification of 2 grades of compositions)

As indicated above, in order to realize considering 2 grades of corrections of adjacent adjacent image point, compare with 1 grade of correction, need 2 times LUT, produce circuit scale and become big disadvantage.Therefore, simplify the 1st grade of LUT (proofreading and correct the LUT that adjacent image point is used).For example, with the 2nd grade of LUT that is taken as 64 * 32 (6 * 5), with the 1st grade of LUT that is taken as 32 * 16 (5 * 4).That is, set for the adjacent image point correction thicker with the interval of setting the signal level of correcting value data among the LUT than the interval of the signal level of setting correcting value data among the LUT of calibration object pixel correction usefulness.

By using this 2 grades of corrections, can be according to the correction of adjacent image point fair copy pixel as a result, but the correction result of adjacent image point at this moment needn't be strict, thereby the 1st grade LUT (proofreading and correct the LUT that adjacent image point is used) can simplify.Difference when not simplifying the 1st grade is insignificant value.

Fig. 8 is the figure that is used to illustrate another crosstalk elimination circuit embodiment of the present invention of realizing that above-mentioned 2 grades of composition LUT use, and the crucial portion of liquid crystal indicator is shown with block diagram.Among Fig. 8, mark the symbol identical with Fig. 1 to having with the part of Fig. 1 identical functions.

As shown in Figure 8,, each primary colors of RGB is proofreaied and correct this 1LUT (1 that is provided with respectively of all kinds in order to realize the LUT of above-mentioned 2 grades of compositions ^StLUT) 21 and 2LUT (2 ^NdLUT) 22.1LUT is that correction uses LUT, 2LUT22 to be to use the calibration object pixel correction LUT that is proofreaied and correct shows signal (level) usefulness corresponding with this pixel by the pairing shows signal of adjacent image point (level) after the corrected value correction of 1LUT21 output to the adjacent image point correction of shows signal (level) usefulness of the adjacent image point adjacent with calibration object pixel (this pixel).That is, 2LUT22 is equivalent to the LUT2 of above-mentioned 1 grade of composition.

In the composition of Fig. 8, for the level of for example fair copy pixel R, be provided with according to the input stage of adjacent image point G and adjacent adjacent image point B obtain 1LUT21 that R that the corrected value of adjacent image point G uses uses and proofread and correct according to the corrected value that utilizes the 1LUT21 that uses by this R to extract after the level of adjacent image point G and the 2LUT22 that uses of the R that uses of the input stage of this pixel R corrected value that obtains this pixel R.Then, corrected value that will extract from the 2LUT22 that above-mentioned R uses and the input stage addition of this pixel R as the shows signal of the R that has proofreaied and correct, are supplied with the pixel capacitors of this pixel R of display board by timing control part 3.

To other look G, the B among the RGB, also proofreaied and correct with the level of adjacent image point and adjacent adjacent image point of similarly using mentioned above respectively.

Moreover the present invention can not only be used for the liquid crystal board that above-mentioned banded arranged picture is formed, and can be used to have the liquid crystal board that the pixel of rounded projections arranged is formed.Here, with mentioned above identical, when eliminating crosstalking between 2 pixels, the wiring of only switching adjacent image point acquisition cuicuit 1 just can be tackled.When producing influencing of crosstalking between 3 pixels, utilizing and making LUT is 3 grades of compositions, also can realize the present invention.

Again, as indicated above, because the potential change of the source electrode line of this pixel and adjacent image point changes the quantity of electric charge that is added on this pixel, generation is crosstalked.Therefore, for accurately, need to monitor the potential change that this pixel is applied the source electrode line in 1 frame period of future behind the voltage, and the effective voltage of fair copy pixel, but input side is under the identical situation of whole image, it is constant always that source electrode line changes in picture, thereby it can be summed up as the relation of this pixel and adjacent image point.For example, purpose is for being used for TV (television receiver), and the high band component of filtering input picture in advance then is even (object pixel around) in the picture done identical in fact catching, also no problem in the practicality.

Above-mentioned crosstalk elimination circuit is conceived to this point, can improve the crosstalk correction effect with easy the composition.Certainly, correcting unit as the simple deterioration in image quality that crosstalking between the neighboring pixels on the direction vertical with source electrode line caused is also effective, but the liquid crystal board and the input shows signal that become object are under the situation of high-resolution, proofread and correct by potential change, can obtain result more accurately according to source electrode line.Below.Set forth this bearing calibration.

Write the quantity of electric charge of certain pixel capacitors, in 1 frame period of future before writing again next time, supplied with the influence of the input shows signal of the whole pixel capacitors on this source electrode line and the adjacent source polar curve.

The above-mentioned generation factor of crosstalking is set up model.The source electrode line 13 of relevant pixel capacitors being supplied with shows signal is called this source electrode line, and 13 of the source electrode lines that other pixel capacitors supply shows signal adjacent with this pixel capacitors used are called the adjacent source polar curve.

This source electrode line that will write at moment i and the current potential of adjacent source polar curve are taken as Vs from i, Vs O i, and the current potential that pixel capacitors is accumulated is defined as Vdi.And, the electric capacity of pixel capacitors is taken as Cpix, the coupling capacitance of this source electrode line and pixel capacitors be taken as Csd from, when the coupling capacitance of adjacent source polar curve and pixel capacitors was taken as Csd O, capacitive coupling can be represented by the formula than these two parameters of α, β.

[formula 1]

…(1)

At this moment, establish on the moment 1, gate turn-on is accumulated current potential Vd in relevant pixel capacitors ₁, and record and narrate the current potential Vdi of the relevant pixel capacitors of i constantly successively, then can be expressed as follows.+/-expression+or-, the type of drive (AC upset) of liquid crystal board depended on.

[formula 2]

Vd ₂=Vd ₁-α (V _{S is from 2}-V _{S is from 1})+/-β (V _{S changes 2}-V _{S changes 1})

Vd ₃=Vd ₂-α (V _{S is from 3}-V _{S is from 2})+/-β (V _{S changes 3}-V _{S changes 2})

=Vd ₁-α (V _{S is from 3}-V _{S is from 1})+/-β (V _{S changes 3}-V _{S changes 1})

．

Vd ₁=Vd ₁-α (V _{S is from i}-V _{S is from 1})+/-β (V _{S changes 1}-V _{S changes 1}) ... (2)

That is the effective voltage of the relevant pixel capacitors when, the display line in 1 frame period being taken as the n bar is as follows.

[formula 3]

Vrms = \sqrt{\frac{1}{n} Σ_{i = 1}^{n} {({Vd}_{i})}^{2}}

That is to say, about the effective voltage of pixel capacitors be subjected to apply on the pixel capacitors electric charge after, input shows signal to the whole pixels on this source electrode line and the adjacent source polar curve in 1 frame period of future of applying again to next time influences, thereby change.The following describes the method for eliminating these influences.

Fig. 9 is the figure that another crosstalk elimination circuit embodiment of the present invention of explanation is used, and the crucial portion of liquid crystal indicator is shown with block diagram.

As shown in Figure 9, the liquid crystal indicator of present embodiment is provided with digital stage is transformed into the magnitude of voltage conversion LUT32 that magnitude of voltage is used, 1 row that video signal delay between 1 departure date is used postpones line storage 24, the 1 frame delay frame memory 25 that the video signal delay in 1 frame period is used, deposit these row correcting value storer 26 of these row correcting value of 1 frame period share, deposit the adjacent column correcting value that the adjacent column correcting value uses and deposit storer 27, correction calculation circuit 28, extract the LUT29 that correcting value is used, and magnitude of voltage is transformed into the digital stage conversion LUT30 of digital stage, as crosstalk elimination circuit.

In crosstalk elimination circuit, when asking correcting value, carry out computing, thereby will be input to video signal conversion with voltage value transform LUT23 and become magnitude of voltage with magnitude of voltage.The voltage characteristic establishment that magnitude of voltage conversion LUT23 is intrinsic according to TFT-LCD6.Voltage characteristic is that TFT-LCD6 is intrinsic, thereby preferably can rewrite from the outside.

Poor with to the magnitude of voltage of the source electrode line of liquid crystal board neighboring pixels electrode below the direction of level of the line storage 24 that postpones 1 row usefulness, the magnitude of voltage that is used to get relevant pixel capacitors.The time of voltage delay 1 row of the relevant pixel capacitors by making input obtains the magnitude of voltage with the source electrode line below neighboring pixels electrode in the horizontal direction of relevant pixel capacitors, the magnitude of voltage of desirable and relevant pixel capacitors poor.

1 frame delay frame memory 25, because need be after input and the corresponding shows signal of relevant pixel, to the next time of the input shows signal of 1 frame period of the future storage of input whole pixels that the source electrode line with described relevant pixel is linked to each other in the horizontal direction again, make the magnitude of voltage of relevant pixel capacitors postpone for 1 frame period.

To the magnitude of voltage of relevant pixel capacitors with take advantage of capacitive coupling than α, β respectively with the difference of the magnitude of voltage of the source electrode line below neighboring pixels electrode in the horizontal direction of relevant pixel capacitors.Obtain this capacitive coupling than α, β by above-mentioned formula 1.Because capacitive coupling is the eigenvalue of TFT-LCD6 than α, β, preferably can change from the outside.

These row correcting value deposit line storage 26 and adjacent column correcting value deposit line storage 27 be used to store whole pixel capacitors that the following 1 frame period share and source electrode line relevant pixel capacitors link to each other in the horizontal direction magnitude of voltage and with the source electrode line of relevant pixel capacitors vertical direction adjacent pixel capacitors and the magnitude of voltage of the whole pixel capacitors that link to each other in the horizontal direction with the source electrode line of this pixel capacitors.That is, with to the magnitude of voltage of relevant pixel capacitors with take advantage of capacitive coupling than α, β respectively with the difference of the magnitude of voltage of the source electrode line below neighboring pixels electrode in the horizontal direction of this pixel capacitors after the value that obtains join storage in these row correcting value line storage 26 and the adjacent column correcting value line storage 27.

At this moment, need deduct the value that relevant pixel with this added before 1 corresponding frame period, thereby use the magnitude of voltage of the relevant pixel capacitors after postponing for 1 frame periods by 1 frame delay frame memory 25, calculate the correcting value before 1 frame period once more, after deducting from the correcting value of relevant pixel, store correcting

value line storage

26,27 separately into.

Correction calculation circuit 28 according to the value of these row correcting value line storage 26 and adjacent column correcting value line storage 27 storages with postponed for 1 frame periods by 1 frame delay frame memory 25 after the magnitude of voltage of relevant pixel capacitors, proofread and correct the magnitude of voltage that is added on the relevant pixel capacitors.The correction calculation here uses above-mentioned formula 3 to proofread and correct.Perhaps, also available correction LUT29 extracts corrected value, and relevant pixel signal is proofreaied and correct.Because proofreading and correct the corrected value of LUT29 is that TFT-LCD6 is intrinsic, preferably can rewrite from the outside.

Then, utilize digital stage conversion LUT30 will proofread and correct the magnitude of voltage conversion after computing circuit 28 is proofreaied and correct and be recovered to digital stage, output to the back level as digital video signal.The voltage characteristic establishment digital stage conversion LUT30 intrinsic according to TFT-LCD6.Voltage characteristic is that TFT-LCD6 is intrinsic, thereby preferably can rewrite from the outside.

Available RAM, ROM realize above-mentioned LUT23,29,30 easily.

Signal after the crosstalk elimination circuit correction of above-mentioned composition is input to timing control part (TC) 3, at timing control part 3 according to the vertical and horizontal-drive signal S that applies from the outside, shows signal is outputed to source electrode driver 4, also will output to gate drivers 5 simultaneously the sweep signal that TFT scans usefulness.Liquid crystal board is driven by source electrode driver 4 and gate drivers 5, thereby crosstalk (being crosstalking of producing on the screen vertical direction) utilizing above-mentioned composition can proofread and correct to produce on the direction parallel with source electrode line, obtains high-quality image demonstration.

In the above-mentioned embodiment, on relevant pixel capacitors the input shows signal after, to the next time by the input 1 frame period of future in, use is input to the shows signal of the pixel capacitors that links to each other along the source electrode line of relevant pixel capacitors and is input to the shows signal that the edge adjacent source polar curve adjacent abreast with this source electrode line link to each other proofreaies and correct the shows signal of relevant pixel capacitors, thereby can eliminate the source electrode line that is subjected to relevant pixel capacitors to influence with the adjacent source polar curve in fact exactly and the crosstalking of the relevant pixel capacitors that produces.

Here, in the above-mentioned embodiment, the situation of crosstalking that produces when having capacitive coupling between source electrode line, adjacent source polar curve and the relevant pixel capacitors of eliminating relevant pixel capacitors has been described, but and when for example not having capacitive coupling between the adjacent source polar curve, by only with the shows signal and the shows signal that is input to relevant pixel capacitors that are input to the pixel capacitors that links to each other along the source electrode line of relevant pixel capacitors, the crosstalking of the relevant pixel capacitors that produces with regard to eliminating the source electrode line that is subjected to relevant pixel capacitors to influence.

Sometimes, about after the input shows signal on the pixel capacitors, to 1 frame period of future of next input again, owing to factors such as electrode wirings, the shows signal that is input to the pixel capacitors of whole image influences.At this moment, deposit in the

storer

26,27 total data of each pixel column of storage by the correcting value that uses above-mentioned embodiment and proofread and correct the shows signal that is input to relevant pixel capacitors, can eliminate that other pixel that is subjected to whole image influences and crosstalking of producing.

Figure 10 is the figure that another embodiment of the above-mentioned crosstalk elimination circuit composition of explanation simplification is used, and the crucial portion of liquid crystal indicator is shown with block diagram.Among Figure 10, mark identical symbol to having with the part of Fig. 9 identical functions.Present embodiment need not 1 frame delay frame memory, can reduce circuit scale.Below, simplification crosstalk elimination circuit embodiment of the present invention is described.

As shown in figure 10, the liquid crystal indicator of present embodiment, be provided with digital stage is transformed into the magnitude of voltage conversion LUT32 that magnitude of voltage is used, 1 row that video signal delay between 1 departure date is used postpones line storage 24, these row summation circuit 31 of these row correcting value of 1 frame period of computing share, the adjacent column summation circuit 32 of the adjacent column correcting value of 1 frame period of computing share, deposit these row correcting value storer 26 of these row correcting value of 1 frame period share, deposit the adjacent column correcting value that the adjacent column correcting value uses and deposit storer 27, correction calculation circuit 28, extract the LUT29 that correcting value is used, and magnitude of voltage is transformed into the digital stage conversion LUT30 of digital stage, as crosstalk elimination circuit.

To the magnitude of voltage of relevant pixel capacitors with and the difference of the magnitude of voltage of the source electrode line below neighboring pixels electrode in the horizontal direction of relevant pixel capacitors, take advantage of capacitive coupling than α, β respectively.Obtain this capacitive coupling than α, β by above-mentioned formula 1.Because capacitive coupling is the eigenvalue of TFT-LCD6 than α, β, preferably can change from the outside.

These row summation circuit 31 and adjacent column summation circuit 32 be used to store whole pixel capacitors that the 1 frame period share and source electrode line relevant pixel capacitors link to each other in the horizontal direction magnitude of voltage and with the source electrode line of relevant pixel capacitors vertical direction adjacent pixel capacitors and the magnitude of voltage of the whole pixel capacitors that link to each other in the horizontal direction with the source electrode line of this pixel capacitors.That is, with to the magnitude of voltage of relevant pixel capacitors with take advantage of capacitive coupling than α, β respectively with the difference of the magnitude of voltage of the source electrode line below neighboring pixels electrode in the horizontal direction of this pixel capacitors after the value that obtains join storage in these row summation circuit 31 and the adjacent column summation circuit 32.

The magnitude of voltage of 1 frame share of storage show to start regularly (vertical synchronizing signal) according to next frame in these row summation circuit 31 and the adjacent column summation circuit 32, is sent to that these row correcting value is deposited line storage 26 and the adjacent column correcting value is deposited line storage 27.

These row correcting value is deposited line storage 26 and adjacent column correcting value and is deposited line storage 27 magnitude of voltage that these row summation circuit 31 and adjacent column summation circuit 32 transmit was kept for 1 frame period, and will be sent to correction calculation circuit 28 with input shows signal corresponding voltage value.

The value that correction calculation circuit 28 keeps according to these row correcting value line storage 26 and adjacent column correcting value line storage 27 with postpone the magnitude of voltage that line storage 24 postpones the relevant pixel capacitors behind 1 line time by 1 row, proofread and correct the magnitude of voltage that is added on the relevant pixel capacitors.The correction calculation here uses above-mentioned formula 3 to proofread and correct.Perhaps, also available correction LUT29 extracts corrected value, and relevant pixel signal is proofreaied and correct.Because proofreading and correct the corrected value of LUT29 is that TFT-LCD6 is intrinsic, preferably can rewrite from the outside.

In addition, available RAM, ROM realize above-mentioned LUT23,29,30 easily.

According to above-mentioned simplification crosstalk elimination circuit, though can not carry out crosstalk correction completely, but be used under the situation of TV (television receiver) etc. for example, the high band component of filtering input picture in advance then, even to do in the picture identical in fact catch also no problem, and because the picture signal difference of interframe little (interframe is relevant big), especially in people's the time response, colour difference sensitivity is low, and is no problem in the practicality.Above-mentioned simplification crosstalk elimination circuit is conceived to this point, can improve calibration result with the composition that reduces circuit scale.

In the above-mentioned embodiment, in 1 frame period of past on relevant pixel capacitors before the input shows signal, use is input to the shows signal of the pixel capacitors that links to each other along the source electrode line of relevant pixel capacitors and is input to the shows signal that the edge adjacent source polar curve adjacent abreast with this source electrode line link to each other proofreaies and correct the shows signal of relevant pixel capacitors, thereby can eliminate the source electrode line that is subjected to relevant pixel capacitors to influence with the adjacent source polar curve in fact exactly and the crosstalking of the relevant pixel capacitors that produces.

Here, in the above-mentioned embodiment, the situation of crosstalking that produces when having capacitive coupling between source electrode line, adjacent source polar curve and the relevant pixel capacitors of eliminating relevant pixel capacitors has been described, but and when for example not having capacitive coupling between the adjacent source polar curve, with the shows signal and the shows signal that is input to relevant pixel capacitors that are input to the pixel capacitors that links to each other along the source electrode line of relevant pixel capacitors, just can eliminate in fact exactly that the source electrode line that is subjected to relevant pixel capacitors influences and the crosstalking of the relevant pixel capacitors that produces by only.

Sometimes in 1 frame period of past on the relevant pixel capacitors before the input shows signal, because factors such as electrode wirings, the shows signal that is input to the pixel capacitors of whole image influences.At this moment, deposit in the

storer

26,27 total data of each pixel column of storage by the correcting value that uses above-mentioned embodiment and proofread and correct the shows signal that is input to relevant pixel capacitors, can eliminate in fact exactly that other pixel that is subjected to whole image influences and crosstalking of producing.

Measuring method when LUT2, the LUT29 that works out the invention described above embodiment is described.When the display brightness white, red, green, blue of the pixel shows signal of the regulation level m of each primary colors was taken as Wm, Rm, Gm, Bm respectively, forming Wm=Rm+Gm+Bm be ideal.Yet owing to produce above-mentioned crosstalking, Wm=Rm+Gm+Bm is false.When the display brightness of the pixel shows signal of red, green pixel regulation level m, n separately is taken as RmGm, equally do not form RmGm=Rm+Gm yet.

The optical measurement that establishment LUT uses is carried out with 2 looks among the RGB.For example, according to the optical measurement of lighting red, green and display brightness when separately regulation level m, n changed of neighboring pixels simultaneously, decision corrected value.In the time of will being taken as Hr, Hg to the corrected value of the regulation level of red, green pixel, extract the corrected value Hr, the Hg that satisfy R (m+Hr) G (n+Hg)=Rm+Gn.Between green, the blue pixel, carry out optical measurement similarly between blue, the red pixel.

As indicated above, crosstalking exists electricity to crosstalk and optical crosstalk.Because have the stray capacitance between bus electrode and the pixel capacitors between the adjacent image point, electricity is crosstalked and is occurred in vertical direction and horizontal direction.Because the light that the difference of the spectral characteristic of color filter and back-lighting causes leaks, optical crosstalk occurs in level, vertical and these 3 directions that tilt.So crosstalk elimination circuit of the present invention, can not only be eliminated electricity to crosstalk, and can eliminate optical crosstalk according to the LUT that above-mentioned optical measurement result adds the light leakage etc. of color filter by establishment.Therefore, crosstalk elimination circuit of the present invention can be eliminated vertical, the level of picture and whole the crosstalking that vergence direction produces.

So far in the explanation, be meant along the pixel capacitors of the source electrode line configuration that is connected with relevant pixel capacitors with other pixel capacitors that the source electrode line of relevant pixel capacitors links to each other in the horizontal direction.Be meant along the pixel capacitors of the gate line configuration that is connected with relevant pixel capacitors at vertical direction neighboring pixels electrode with the source electrode line of relevant pixel capacitors.

So far in the explanation, the present invention elaborates the constant in fact correction of display brightness of carrying out relevant pixel capacitors, constant in fact degree, the scope that can fully see look originally for the observer that be meant here, there is the item of having known when difference is this case application of allowing of look in people's vision.For example, Figure 11 illustrates classification and the general vision degree of aberration Δ E, is used as the scope that identical look handles (be aberration smaller or equal to 6.5 level) on the impression degree among the figure and is equivalent to constant in fact.

Claims

1, a kind of liquid crystal indicator uses a plurality of pixel capacitors is formed rectangular active array type liquid crystal board, and by relevant pixel capacitors being applied voltage and this electric charge being kept for 1 frame period, color display is characterized in that,

Have the correcting unit of proofreading and correct the shows signal that is input to each pixel capacitors,

This correcting unit is proofreaied and correct the shows signal that be input to relevant pixel capacitors, makes the display brightness of relevant pixel with respect to the former display brightness that should show, aberration Δ E is smaller or equal to 6.5, and is irrelevant with the shows signal of the pixel capacitors that is input to whole screen.

2, the liquid crystal indicator described in claim 1 is characterized in that,

Described correcting unit uses the shows signal and the shows signal that should be input to relevant pixel capacitors that be input to along the continuous pixel capacitors of each source electrode line, produces the correction signal to the shows signal that should be input to relevant pixel capacitors.

3, the liquid crystal indicator described in claim 1 is characterized in that,

Described correcting unit is proofreaied and correct the shows signal that be input to relevant pixel capacitors during after the input shows signal on the relevant pixel capacitors, make the display brightness of relevant pixel with respect to the former display brightness that should show, aberration Δ E is smaller or equal to 6.5, and is irrelevant with the shows signal that is input to relevant pixel capacitors pixel capacitors in addition.

4, the liquid crystal indicator described in claim 2 is characterized in that,

Described correcting unit the timing that should import shows signal on the relevant pixel capacitors and subsequent during, with the shows signal and the shows signal that should be input to relevant pixel capacitors that should be input to relevant pixel capacitors pixel capacitors in addition, produce correction signal to the shows signal that should be input to relevant pixel capacitors.

5, the liquid crystal indicator described in claim 1 is characterized in that,

Described correcting unit is to during before the relevant pixel capacitors input shows signal, correction should be input to the shows signal of relevant pixel capacitors, make the display brightness of relevant pixel with respect to the former display brightness that should show, aberration Δ E is smaller or equal to 6.5, and is irrelevant with the shows signal that is input to relevant pixel capacitors pixel capacitors in addition.

6, the liquid crystal indicator described in claim 2 is characterized in that,

Described correcting unit the timing that should import shows signal on the relevant pixel capacitors and preceding during, with the shows signal and the shows signal that should be input to relevant pixel capacitors that are input to relevant pixel capacitors pixel capacitors in addition, produce correction signal to the shows signal that should be input to relevant pixel capacitors.

7, a kind of crosstalk elimination circuit is used for liquid crystal indicator, and this liquid crystal indicator uses a plurality of pixel capacitors are formed rectangular active array type liquid crystal board, by relevant pixel capacitors being applied voltage and this electric charge being kept for 1 frame period, color display is characterized in that

8, the crosstalk elimination circuit described in claim 7 is characterized in that,

9, the crosstalk elimination circuit described in claim 7 is characterized in that,

10, the crosstalk elimination circuit described in claim 8 is characterized in that,

Described correcting unit is imported shows signal on relevant pixel capacitors timing reaches thereafter, with the shows signal and the shows signal that should be input to relevant pixel capacitors that should be input to relevant pixel capacitors pixel capacitors in addition, produce correction signal to the shows signal that should be input to relevant pixel capacitors.

11, the crosstalk elimination circuit described in claim 7 is characterized in that,

12, the crosstalk elimination circuit described in claim 8 is characterized in that,

Described correcting unit is imported the timing of shows signal and preceding on relevant pixel capacitors, with the shows signal and the shows signal that should be input to relevant pixel capacitors that should be input to relevant pixel capacitors pixel capacitors in addition, produce correction signal to the shows signal that should be input to relevant pixel capacitors.

13, a kind of display control method, be used for liquid crystal indicator, this liquid crystal indicator uses a plurality of pixel capacitors is formed rectangular active array type liquid crystal board, by relevant pixel capacitors being applied voltage and this electric charge being kept for 1 frame period, color display, it is characterized in that, comprise following steps:

Have the aligning step of proofreading and correct the shows signal that is input to each pixel capacitors,

This aligning step is proofreaied and correct the shows signal that be input to relevant pixel capacitors, makes the display brightness of relevant pixel with respect to the former display brightness that should show, aberration Δ E is smaller or equal to 6.5, and is irrelevant with the shows signal of the pixel capacitors that is input to whole screen.

14, the display control method described in claim 13 is characterized in that,

Described aligning step uses the shows signal and the shows signal that should be input to relevant pixel capacitors that be input to along the continuous pixel capacitors of each source electrode line, produces the correction signal to the shows signal that should be input to relevant pixel capacitors.

15, the display control method described in claim 13 is characterized in that,

Described aligning step is proofreaied and correct the shows signal that be input to relevant pixel capacitors during after the input shows signal on the relevant pixel capacitors, make the display brightness of relevant pixel with respect to the former display brightness that should show, aberration Δ E is smaller or equal to 6.5, and is irrelevant with the shows signal that is input to relevant pixel capacitors pixel capacitors in addition.

16, the display packing described in claim 14 is characterized in that,

17, the display control method described in claim 13 is characterized in that,

Described aligning step before the relevant pixel capacitors of reply input shows signal during, correction should be input to the shows signal of relevant pixel capacitors, make the display brightness of relevant pixel with respect to the former display brightness that should show, aberration Δ E is smaller or equal to 6.5, and is irrelevant with the shows signal that is input to relevant pixel capacitors pixel capacitors in addition.

18, the display control method described in claim 14 is characterized in that,