CN1864198A

CN1864198A - Liquid crystal display and driving method thereof

Info

Publication number: CN1864198A
Application number: CNA038204533A
Authority: CN
Inventors: 卢水贵; 蔡钟哲; 宋根圭; 崔井义; 卢南锡
Original assignee: Samsung Electronics Co Ltd
Current assignee: Samsung Display Co Ltd
Priority date: 2002-08-30
Filing date: 2003-08-29
Publication date: 2006-11-15
Anticipated expiration: 2023-08-29
Also published as: JP2006511829A; TWI253044B; TW200502904A; KR20040020317A; CN100444231C; AU2003256124A1; WO2004021323A2; WO2004021323A3; AU2003256124A8

Abstract

Provided is a liquid crystal display, comprising: a plurality of arrays of alternately arranged first and second rows of pixels, each first row including red, blue and green pixels or red, green and blue pixels arranged in sequence, Each second row includes red, blue, and green pixels or red, green, and blue pixels arranged in sequence and has an arrangement shifted by one pixel from the first row, and each pixel includes: a pixel electrode and a thin film Transistors; a plurality of gate lines extending in the row direction for sending gate signals to the pixels; a plurality of data lines extending in the column direction for sending data signals to the pixels.

Description

Liquid Crystal Display And Method For Driving

Technical field

The present invention relates to a kind of Liquid Crystal Display And Method For Driving.

Background technology

Generally, LCD (LCD) comprises the liquid crystal board assembly, and this liquid crystal board assembly comprises: two plates have two kinds of fields and produce electrode, such as a plurality of pixel electrodes and a public electrode; Liquid crystal layer has dielectric anisotropy therebetween.The variation of the intensity of the variation of the voltage difference between the generation electrode on the scene, the electric field that promptly produced by electrode changes the optical transmission rate by LCD, therefore obtains desired images by the voltage difference that is controlled between the electrode.

LCD comprises a plurality of pixels, and they have pixel electrode and redness (R), green (G) and blue (B) color filter.Described pixel is driven to carry out display operation via the signal that is applied to it by the monitor signal line.Described signal wire comprises: gate line (or scan signal line) is used to carry sweep signal; Data line is used for carry data signals.Each pixel has thin film transistor (TFT) (TFT), and it is connected to one of gate line and one of data line, is used to control the data-signal that is applied to pixel electrode.

Simultaneously, there is the arrangement of the redness (R) of several types, green (G) and blue (B) color filter.Example is: stripe, and wherein the color filter of same color is arranged in the identical pixel column; The mosaic type wherein is arranged in order redness, green and blue color filter along the row and column direction; Triangular type is wherein arranged pixel with zigzag, and is arranged in order redness, green and blue color filter on column direction.Described triangular type is correctly represented circle or diagonal line.

The ClairVoyante laboratory has proposed to be called as " PenTile matrix ^TM" pixel arrange, it is useful on the display of high resolution images when minimum design cost is provided.In such pixel was arranged, blue unit picture element was publicly-owned by two points, and adjacent blue pixel receives data-signal from a data drive integrated circult when the grid-driving integrated circuit different by two drives.Use PenTile matrix pixel structure, can realize the resolution of super XGA (Extended Graphics Array) (UXGA) level by the display of Super Video Graphics Array (SVGA) level.And the quantity of low-cost grid-driving integrated circuit is increased, but the quantity of expensive data-driven integrated circuit is lowered.This has minimized the production cost of display.

Have LCD that described pixel arranges and be required to present improving resolution, and be used for the described pixel groups that presents and be required suitably to select to prevent visual variation.

Summary of the invention

The object of the present invention is to provide a kind of LCD with good visibility.

A kind of LCD is provided, it comprises: the array of a plurality of first and second row pixels of alternately arranging, each first row comprises redness, blueness and green pixel or redness, green and the blue pixel of arranging in regular turn, each second row comprises redness, blueness and green pixel or redness, green and the blue pixel of arranging in regular turn, and have from the arrangement of a pixel of the first row displacement, each pixel comprises: a pixel electrode and a thin film transistor (TFT); Many gate lines extend on line direction, are used for sending signal to pixel; Many data lines are expanded on column direction, are used for sending data-signal to pixel.

Described LCD is preferably based on the pixel groups that is used to present and is presented, and described pixel groups comprises a center pixel and a plurality of peripheral pixel, and described a plurality of peripheral pixels have the weighting of depending on the distance of center pixel.Become big when preferably, the described distance that adds as and center pixel increases.

Every data line can comprise the coupling part, is used for receiving data-signal from external devices.

Described LCD can also comprise passivation layer, and it is disposed between pixel electrode and gate line and the data line, is formed by the low-dielectric material, and has a plurality of contact holes, is used to connect thin film transistor (TFT) and pixel electrode.

A kind of method that drives LCD is provided, described LCD comprises a plurality of pixels, described pixel comprises a plurality of conversion elements and is connected to many signal line of described conversion element, described method comprises: the pixel of coming weighting to be used to present according to the pixel groups that comprises a center pixel and a plurality of peripheral pixels, so that the distance with described center pixel is depended in the weighting of described pixel; Provide data voltage to data line, described data voltage has the value that depends on weighting; With connect described conversion element to send data voltage to pixel electrode.

Described weighting preferably becomes big when the distance with described center pixel increases.

Description of drawings

By preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings, above-mentioned and other advantages of the present invention will become apparent, wherein:

Fig. 1 is the block scheme according to the LCD of one embodiment of the present of invention;

Fig. 2 is the equivalent circuit diagram according to the pixel of the LCD of one embodiment of the present of invention;

Fig. 3 A, 4A and 5A illustrate the spatial disposition according to the pixel of the LCD of embodiments of the invention;

Fig. 3 B, 4B and 5B illustrate the one group of pixel that forms a point, and it is the base unit that is used for respectively the image arranged in the pixel shown in Fig. 4 A and the 5A;

Fig. 6 is the layout view that is used for according to the demonstration tft array plate of the LCD of one embodiment of the present of invention;

Fig. 7 is the cut-open view of the tft array plate shown in Figure 6 got along line VII-VII ';

Fig. 8 is the layout view that is used for according to the demonstration tft array plate of the LCD of an alternative embodiment of the invention;

Fig. 9 A and 9B are the cut-open views of the tft array plate shown in Figure 8 got along line IXA-IXA ' and line IXB-IXB ' respectively;

Figure 10 A-10C is the exemplary pixels group that is used for according to the LCD that is presented of embodiments of the invention;

Figure 11 illustrates according to the demonstration weighting in the presenting of the LCD of one embodiment of the present of invention;

Figure 12 A and 12B are respectively the demonstration weightings in presenting of the LCD shown in Figure 10 B and the 10C.

Embodiment

Below, with reference to accompanying drawing the preferred embodiments of the present invention are described more fully, preferred embodiment shown in the drawings.

In the accompanying drawings, for clear, amplified the thickness in layer and zone.In whole accompanying drawings, identical drawing reference numeral is represented identical element.Can understand, when the element such as layer, zone or substrate be called as another element " on " time, it can be directly on other elements or also can have an element of intervention.On the contrary, when an element be called as " directly " another element " on " time, do not have the element of intervention.

Now, explain LCD with reference to the accompanying drawings according to embodiments of the invention.

Fig. 1 is the block scheme according to the LCD of one embodiment of the present of invention, and Fig. 2 is the equivalent circuit diagram according to the pixel of the LCD of one embodiment of the present of invention.

Referring to Fig. 1, according to the LCD of one embodiment of the present of invention comprise LC board component 300, be connected to board component 300 gate drivers 400 and data driver 500, be connected to data driver 500 grayscale voltage generator 800, be used to control the signal controller 600 of said elements.

LC board component 300 in topology view shown in Figure 2 comprises lower plate 100, upper plate 200 and intervenient liquid crystal layer 3, and it comprises a plurality of display signal line G simultaneously ₁-G _nAnd D ₁-D _mAnd a plurality of connected pixels, described a plurality of pixels are shown arranged greatly in the circuit view shown in Fig. 1 and 2.

Display signal line G ₁-G _nAnd D ₁-D _mBe provided on the lower plate 100, and comprise many gate lines G that are used to send signal (being called sweep signal) ₁-G _nWith many data line D that are used to send data-signal ₁-D _mDescribed gate lines G ₁-G _nRoughly on line direction, extend, and essence is parallel each other, and described data line D ₁-D _mRoughly on column direction, extend, and essence is parallel each other.

Each pixel comprises: conversion element Q, it is connected to display signal line G ₁-G _nAnd D ₁-D _mLC capacitor C _LCWith holding capacitor C _ST, they are connected to conversion element Q.If unwanted words can be omitted holding capacitor C _ST

Conversion element Q such as TFT is provided on the lower plate 100, and has three terminals: control end is connected to gate lines G ₁-G _nOne of; Input end is connected to data line D ₁-D _mOne of; And output terminal, be connected to LC capacitor C _LCWith holding capacitor C _ST

LC capacitor C _LCBe included in pixel electrode 190 on the lower plate 100, at the public electrode on the upper plate 200 270 with as the dielectric LC layer 3 between electrode 190 and 270.Pixel electrode 190 is connected to conversion element Q, and the whole surface of public electrode 270 covering upper plates 100, and is provided common electric voltage Vcom.Perhaps, on lower plate 100, provide pixel electrode 190 and public electrode 270 with bar-shaped or strip.

Holding capacitor C _STBe LC capacitor C _LCAuxiliary capacitor.Holding capacitor C _ST Comprise pixel electrode 190 and be provided at independently signal wire (not shown) on the lower plate 100, overlapping via insulator and pixel electrode 190, and be provided predetermined voltage such as common electric voltage Vcom.Perhaps, holding capacitor C _ST Comprise pixel electrode 190 and be called as the adjacent gate polar curve of gate line the preceding, it is overlapping via insulator and pixel electrode 190.

For color monitor, each pixel is by providing one of a plurality of color filters 230 to represent itself color in by pixel electrode 190 region occupied.Color filter 230 shown in Figure 2 is provided in the corresponding region of upper plate 200.Perhaps, color filter 230 be provided on the pixel electrode 190 on the lower plate 100 or under.

Preferably, the color of color filter 230 is such as one of red, green and blue primary colours.Below, a pixel is called as redness, green or blue pixel according to the color of being represented by described pixel, and is represented by drawing reference numeral R, G or B.

On the outside surface of the plate 100 of

board component

300 and 200, added and be used for a pair of polarizer (not shown) of polarization from the light of lamp 341.

Fig. 3 A illustrates the spatial disposition according to the pixel of the LCD of one embodiment of the present of invention.

Referring to Fig. 3 A, have big or small about equally a plurality of pixels and be arranged in the matrix, described matrix comprises a plurality of pixel columns and a plurality of pixel column.

Each pixel column comprises expression three kinds of color pixel, i.e. red pixel R, green pixel G and blue pixel B.The order of the pixel in the pixel column shown in Fig. 3 A is red pixel R, blue pixel B and green pixel G or green pixel G, blue pixel B and red pixel R.

Described pixel column comprises a plurality of double-colored row and a plurality of monochromatic row.As shown in Figure 3A, each double-colored row comprises red pixel R and green pixel G, and each monochromatic row comprises blue pixel B.

When only watching double-colored row, any two pixels adjacent one another are in line direction or column direction are represented different colors, and therefore described double-colored row form checkerboard pattern.Each monochromatic row is between double-colored row.

Fig. 3 B illustrates the pixel groups that forms a point, and it is the base unit that is used at the image of the arrangement of the pixel shown in Fig. 3 A.Each group comprises six pixels, i.e. two adjacent center pixels in monochrome row and four pixels in double-colored row, and described four pixels in double-colored row are adjacent with corresponding center pixel on line direction.

Fig. 4 A and 5A illustrate the spatial disposition according to the pixel of the LCD of other embodiment of the present invention.

Referring to Fig. 4 A and 5A, a plurality of pixels that have about equally size in the matrix that comprises a plurality of pixel columns and a plurality of pixel columns, have been arranged.

Each pixel column comprises expression three kinds of color pixel, i.e. red pixel R, green pixel G and blue pixel B.The order of the pixel in the pixel column shown in Fig. 4 A is red pixel R, blue pixel B and green pixel G, and shown in Fig. 5 A is being red pixel R, green pixel G and blue pixel B.Pixel in adjacent two pixel columns of expression same color is arranged in the adjacent row, and separately pixel arrange to equate in odd column and even column.Every row comprise two among red pixel R, green pixel G and the blue pixel B.

Fig. 4 B and 5B illustrate the one group of pixel that forms a point, and it is the base unit of the image in the pixel shown in Fig. 4 A and the 5A is arranged respectively.Each group comprises one 2 * 3 picture element matrix.Matrix shown in Fig. 4 B comprises: first row, and it comprises red pixel R, blue pixel B and the green pixel G that arranges in regular turn; Second row comprises green pixel G, the red pixel R and the blue pixel B that arrange in regular turn.On the contrary, the matrix shown in Fig. 5 B comprises: first row, and it comprises red pixel R, green pixel G and the blue pixel B that arranges in regular turn; Second row comprises blue pixel B, the red pixel R and the green pixel G that arrange in regular turn.

Pixel shown in Fig. 4 A and the 5A is arranged to provide and is better than the visuality shown in Fig. 3 A.Specifically, pixel shown in Fig. 3 A is arranged and is made blue pixel column be seen as Blue Streak, and shown in Fig. 4 A and the 5B those are not like this.

Point shown in Fig. 4 B and the 5B only is its example, and the point that the pixel shown in Fig. 4 A and the 5B is arranged can have various configurations.

Referring now to Fig. 6 and 7 demonstration detailed structure according to the tft array plate of the LCD of one embodiment of the present of invention is described.

Fig. 6 is the layout view according to the demonstration tft array plate of the LCD of one embodiment of the present of invention, and Fig. 7 is the cut-open view of the tft array plate shown in Figure 6 got along line VII-VII '.

On dielectric base 110, be formed for sending many gate lines 121 of signal.Each gate line 121 roughly extends in the horizontal, and a plurality of parts of each gate line 121 form a plurality of gate electrodes 123.Each gate line 121 comprises a plurality of expansions 127 to lower process.

Gate line 121 comprises the low resistance conductive layer, and it is preferably by comprising such as the Ag of the metal of Ag and Ag alloy or comprising that the Al such as the metal of Al and Al alloy forms.Gate line 121 can have the structure of multilayer, comprise low resistance conductive layer and another layer, described another layer be preferably by Cr, Ti, Ta, Mo or such as their alloy composition of MoW alloy, and they have good physics, chemistry and contact characteristics with other materials such as ITO (tin indium oxide) and IZO (indium zinc oxide).Ceng good exemplary combinations is Cr and Al-Nd alloy like this.

The side of gate line 121 is tapered, and described side is about 30-80 degree with respect to the scope at the pitch angle on the surface of substrate 110.

Preferably the gate insulator of being made up of silicon nitride (SiNx) 140 is formed on the gate line 121.

On gate insulator 140, form best a plurality of semiconductor islands 154 of forming by amorphous silicon hydride (abbreviating " a-Si " as).

Form a plurality of

resistive contacts island

163 and 165 on semiconductor island 154, they preferably are made up of silicide that has been doped many n type impurity or n+ hydrogenation a-Si.

Resistive contact island

163 and 165 is positioned on the semiconductor island 154 in couples.

The side of semiconductor island 154 and

resistive contact

163 and 165 is tapered, and its pitch angle is preferably in the scope of about 30-80 degree.

Resistive contact

163 and 165 and gate insulator 140 on form many data lines 171, a plurality of drain electrode 175 and a plurality of storage capacitor conductors 177.

Be used to send the roughly extension in the vertical of data line 171 of data voltage, and intersect with gate line 121.A plurality of branches to 175 each data line 171 that extends that drain form the multiple source utmost point 173.The every pair of source electrode 173 and drain electrode 175 are separated from one another and with respect to grid 123 and toward each other.Grid 123, source electrode 173 and drain 175 and semiconductor island 154 form TFT, it has the raceway groove that forms in source electrode 173 and the semiconductor island 154 between 175 of draining.

Storage capacitor conductors 177 is overlapping with the expansion 127 of gate line 121.

Data line 171, drain electrode 175 and storage capacitor conductors 177 also comprise the low resistance conductive layer, and it is preferably by comprising such as the Ag of the metal of Ag and Ag alloy or by comprising that the Al such as the metal of Al and Al alloy forms.Data line 171, drain electrode 175 and storage capacitor conductors 177 can have the structure of multilayer, comprise low resistance conductive layer and another layer, described another layer be preferably by Cr, Ti, Ta, Mo or such as their alloy composition of MoW alloy, and they have good physics, chemistry and contact characteristics with other materials such as ITO (tin indium oxide) and IZO (indium zinc oxide).Ceng good exemplary combinations is Cr and Al-Nd alloy like this.

Data line 171, drain electrode 175 and the side of storage capacitor conductors 177 are tapered, and described side is about 30-80 degree with respect to the scope at the pitch angle on the surface of substrate 110.

Resistive contact

163 and 165 and reduces therebetween contact resistance only between the drain electrode 175 of the data line 171 of following semiconductor island 154 and stack and the stack on it.

On the exposed portion of data line 171, drain electrode 175, storage conductor 177 and semiconductor island 154, form passivation layer 180.Described passivation layer 180 preferably is made up of following: have the photosensitive organic material of good flatness characteristic, such as a-Si:C:O that forms by plasma enhanced chemical vapor deposition (PECVD) and low medium insulating material or the inorganic material such as silicon nitride the a-Si:O:F.Perhaps, passivation layer 180 can comprise SiNX film and organic membrane.

Passivation layer 180 has a plurality of contact holes 185,187 and 189 that expose to the open air to the end 179 of drain electrode 175, storage conductor 177 and data line 171 respectively.Passivation layer 180 and gate insulator 140 have a plurality of contact holes 182 that expose to the open air to the end 125 of gate line 121.

Form a plurality of pixel electrodes 190 and a plurality of

contact adminicle

92 and 97 on passivation layer 180, described a plurality of contact adminiclies 92 and 97 preferably are made up of IZO and ITO.

Pixel electrode 190 physically and electronically is connected to drain electrode 175 and is connected to storage capacitor conductors 177 by contact hole 187 by contact hole 185, so that pixel electrode 190 is from 175 data voltages that receive data voltage and received to storage capacitor conductors 77 transmissions that drain.

Return referring to Fig. 2, the pixel electrode 190 and public electrode 270 cooperations on other plates 200 that are provided described data voltage produce electric field, and this electric field redirects the liquid crystal molecule in the therebetween liquid crystal layer 3.

As mentioned above, pixel electrode 190 and public electrode 270 form liquid crystal capacitor C _LC, it is stored in closes the voltage that is applied behind the TFT Q.With liquid crystal capacitor C _LCParallel building-out condenser that connect, that be called as " holding capacitor " is provided to strengthen the store voltages capacity.Holding capacitor is to realize by the gate line 121 (being called " gate line the preceding ") that pixel electrode 190 stacks are adjacent.By following manner improve holding capacitor electric capacity, be memory capacitance: provide expansion 127 improving overlapping area at gate line 121, and provide storage capacitor conductors 177 190 times at pixel electrode---it be connected to pixel electrode 190 and and expansion 270 overlapping---to be reduced in the distance between the terminal.

Pixel electrode 190 overlapping gate polar curves 121 and data line 171 are with raising aperture ratio, but this selects for use.

Contact

adminicle

92 and 97 is connected to the end of exposing to the open air 125 of gate line 121 and the end of exposing to the open air 179 of data line 171 by

contact hole

182 and 189

respectively.Contact adminicle

92 and 97 is dispensable, but preferred, with protection exposed

portion

125 and 179 and replenish exposed

portions

125 and 179 and the degree of adhesion of external devices.

According to an alternative embodiment of the invention, pixel electrode 190 is made up of transparent conducting polymer.For reflection-type or transmission-type LCD, pixel electrode 190 comprises translucent reflective metals.

Describe tft array plate in detail with reference to Fig. 8,9A and 9B according to the LCD of an alternative embodiment of the invention.

Fig. 8 is the layout view according to the demonstration tft array plate of the LCD of an alternative embodiment of the invention, and Fig. 9 A and 9B are the cut-open views of the tft array plate shown in Figure 8 got along line IXA-IXA ' and line IXB-IXB ' respectively.

As shown in the figure, according to shown in the hierarchy of the tft array plate of the LCD of this embodiment and Fig. 6 and 7 much at one.That is, formation comprises many gate lines 121 of a plurality of grids 123 in substrate 110, and forms gate insulator 140 thereon.On gate insulator 140, form a plurality of semiconductor stripeds 151 comprise a plurality of expansions 154 corresponding with the semiconductor island 154 shown in Fig. 6 and 7, and form a plurality of resistance contact stripeds 161 on semiconductor striped 151, it comprises that contacting the corresponding a plurality of expansions 163 in island 163 with the resistance shown in 7 with Fig. 6 contacts island 165 with a plurality of resistance.On

resistance contact portion

161 and 165, form many data lines 171,, and form passivation layer 180 thereon comprising a plurality of source electrodes 173, a plurality of drain electrode 175 and a plurality of storage capacitor conductors 177.A plurality of contact holes 182,185,187 and 189 are provided on passivation layer 180 and/or gate insulator 140, and on passivation layer 180, have formed a plurality of pixel electrodes 190 and a plurality of

adminicle

92 and 97 of contacting.

Different with the tft array plate shown in Fig. 6 and 7, on the layer identical, provide a plurality of storage electrode lines 131 that separate with gate line 121 according to the tft array plate of this embodiment, and do not use the expansion of gate line 121 with storage capacitor conductors 177 overlapping storage electrode lines 131 to form holding capacitor with gate line 121.Storage electrode line 131 is provided the predetermined voltage such as common electric voltage.If the memory capacitance that produces by overlapping gate polar curve 121 and pixel electrode 190 is enough big, then can omit storage electrode line 131 and storage capacitor conductors 177.

In addition, semiconductor striped 151,

resistance contact portion

161 and 165 and thereon a plurality of semiconductor islands 157 and a plurality of resistance contact portion 167 between storage conductor 177 and gate insulator 140, are provided.

Described semiconductor striped and

island

151 and 157 have and data line 171, drain electrode 175 and storage capacitor conductors 177 and resistance contact portion below 161,165 and 167 flat shape much at one, except the expansion 154 that TFT wherein is provided.On concrete, semiconductor island 157, resistance contact island 167 and storage conductor 177 have essentially identical flat shape.Semiconductor striped 151 comprises some exposed portion, and they are not by such as in source electrode 173 and the part between 175 of draining, and promptly data line 171, drain electrode 175 and storage conductor 177 cover.

LCD with above-mentioned pixel arrangement is presented (rendering) to improve resolution, with reference to Figure 10 A-10C this is described in detail.

Figure 10 A-10C is the exemplary pixels group according to the LCD of embodiments of the invention that is used to be presented.Presenting based on the pixel shown in Fig. 3 A shown in Figure 10 A arranged, and those shown in Figure 10 B and the 10C are arranged based on the pixel shown in Fig. 4 A.

Referring to Figure 10 A, the exemplary pixels group that is used for presenting is the center with any pixel at double-colored pixel column.Described pixel groups is included in four pixels (hereinafter referred to as " peripheral pixel ") and two pixels in monochrome row in the double-colored row, and they and center pixel are adjoining.Figure 10 A shows a pixel groups, comprises red pixel R and four green pixel G1-G4 and two blue pixel B1 and B2, and four green pixel G1-G4 and two blue pixel B1 and B2 and red pixel R are adjoining.

Referring to Figure 10 B and 10C, an exemplary pixels group that is used to present comprises center red pixel R and four green pixel G1-G4 (hereinafter referred to as " peripheral pixel ") and two blue pixel B1 and B2, four green pixel G1-G4 and two blue pixel B1 and B2 and center red pixel R are adjoining, an exemplary pixels group that is used to present or comprise a center green pixel G and four red pixel R1-R4 (hereinafter referred to as " peripheral pixel ") and two blue pixel B1 and B2, they and center pixel G are adjoining.

According to one embodiment of the present of invention, presenting to center pixel shown in Figure 10 A-10C provides half the weighting that is equal to or greater than total weighting, and pixel provides the weighting that equates to the periphery.But this has caused phase error, and it is that difference owing to the distance between peripheral pixel and center pixel produces.

In the example shown in Figure 10 A and the 10B, central red pixel R with on, distance (hereinafter referred to as " first apart from ") between a left side and following green pixel G1, the G2 equates, and the distance between the red pixel R of center (hereinafter referred to as " second distance ") is greater than first distance, because inserted a blue pixel between red pixel R and right green pixel G3, this has produced phase error.

In the example shown in Figure 10 C, produced an error, it is because first distance and the difference between the second distance between green pixel G and the left pixel R2 between green pixel G and right green pixel R3 cause.In addition, though equate with two red pixel R1 and the distance between the R4 (hereinafter referred to as " the 3rd distance ") from its skew at green pixel G, but, having produced other vertical phase error, this is because the difference between the 3rd distance and first and second distances causes.

In order to remove phase error, the distance between peripheral pixel and center pixel is depended in the weighting of peripheral pixel and difference is come in detail to this explanation with reference to Figure 11,12A and 12B.

Figure 11 illustrates according to the demonstration weighting in the presenting of the LCD of one embodiment of the present of invention, and Figure 12 A and 12B are respectively the demonstration weightings in presenting of the LCD shown in Figure 10 B and the 10C.

Example shown in Figure 11 is based on presenting shown in Figure 10 A.Indicate by " Da " in green pixel G and the distance between the red pixel Rc in the some P of line direction, distance between two pixels of being close on the line direction is by " Db " indication, and the distance between two pixels of being close in column direction is indicated by " Dc ".

By this way, for presenting in the demonstration shown in Figure 10 B, the distance that is used for red pixel R equals " 0 ", distance between red pixel R and left green pixel G2 equals Db, distance between red pixel R and right green pixel G3 equals Da, distance between red pixel R and upper and lower green pixel G1 and G4 equals Dc, shown in the a1 among Figure 12 A.

At this, the spacing of supposing red pixel R and green pixel G is " 190 (column direction) * 137 (line direction) ", the spacing of blue pixel B is " 190 (column direction) * 106 (line direction) ", less than red and green pixel R and G, and the size of putting P is " 380 (longitudinal length) * 380 (lateral length) " on line direction for it.

Then, the example a1 shown in Figure 12 A is represented as b1 in Figure 12 A.As can be seen in the distance between red pixel R and the left green pixel G2 greater than the distance between red pixel R and right green pixel G3.

Determine the weighting of pixel according to distance.For example, when using center red pixel R to present 32 gray scales, described red pixel R has been assigned with about 0.5 weighting, and according to the distance of described red pixel R to the periphery green pixel G1-G4 distribute the weighting of about 0.5 the total weighting of residue, shown in the c1 among Figure 12 A.When the distance with center pixel R increased, described weighting diminished, thus the demonstration ratio of compensation reduction.

Shown in the c1 among Figure 12 A, the left green pixel G1 nearest with red pixel R is weighted 0.165, and R nearest G1 of green pixel up and down and G4 is weighted 0.12 with red pixel, and right green pixel R3 is weighted 0.095.

Referring to Figure 12 B, when shown in Figure 10 C, being current, according to determining the weighting of peripheral pixel with the distance of center pixel.

Return referring to Fig. 1, grayscale voltage generator 800 produces two groups of a plurality of grayscale voltages that are associated with the transmissivity of pixel.Grayscale voltage in one group has positive polarity with respect to common electric voltage Vcom, and the grayscale voltage in another group has negative polarity with respect to common electric voltage Vcom.

Gate drivers 400 is connected to the gate lines G of board component 300 ₁-G _n, and synthetic gate turn-on voltage Von and grid cut-off voltage Voff are applied to gate lines G to produce signal ₁-G _n

Data driver 500 is connected to the data line D of board component 300 ₁-D _m, and to data line D ₁-D _mApply from the data voltage of the gray-scale voltage selection that provides from grayscale voltage generator 800.

Describe the operation of LCD now in detail.

Signal controller 600 is provided RGB picture signal R, G and B, and be used to control the control signal of its demonstration from the input of external graphics controller (not shown), such as vertical synchronizing signal Vsync, horizontal-drive signal Hsync, major clock MCLK and data enable signal DE.Produce grid control signal CONT1 and data controlling signal CONT2 and according to picture signal R, the G of the control signal of input and input and picture signal R, G and B that B handles the operation that is suitable for board component 300 after, handled picture signal R ', G ' and B ' and data controlling signal CONT2 that signal controller 600 is provided for the grid control signal CONT1 of gate drivers 400 and is used for data driver 500.

The processing of picture signal R, G and B comprises the data processing that is used to present, and it is according to coming to the pixel weights assigned with the distance of center pixel.

Grid control signal CONT1 comprises: vertical synchronization commencing signal STV is used for the beginning of notification frame; Gate clock signal CPV is used to control the output time of gate-on voltage Von; With output enable signal OE, be used to define the width of described gate-on voltage Von.Data controlling signal CONT2 comprises: horizontal synchronization commencing signal STH is used to notify the beginning of horizontal cycle; Signal LOAD or TP are installed, are used for indication to data line D ₁-D _mApply suitable data voltage; Reverse control signal RVS is used for the polarity of reversal data voltage (with respect to common electric voltage Vcom); With data clock signal HCLK.

Data driver 500 receives view data R ', the G ' of a pixel column and the grouping of B ' from signal controller 600, and in response to from the data controlling signal CONT2 of signal controller 600 analog data voltage of selecting is provided for described view data R ', G ' and B ' from the grayscale voltage that provides from grayscale voltage generator 800.

In response to the grid control signal CONT1 from signal controller 600, gate drivers 400 is to gate lines G ₁-G _nApply gate-on voltage Von, connect connected conversion element Q thus.

Data driver 500 turn-on time (be called " horizontal cycle " or " 1H ", and equal the one-period of horizontal-drive signal Hsync, data enable signal DE and gate clock signal CPV) of conversion element Q to corresponding data line D ₁-D _mApply data voltage.Then, data voltage is provided to corresponding pixel via the conversion element Q of conducting then.

Be expressed as LC capacitor C at data voltage and the difference that is applied between the common electric voltage Vcom of pixel _LCCharging voltage, i.e. pixel voltage.Liquid crystal molecule has the location of the amplitude that depends on pixel voltage, and described location is determined by LC capacitor C _LCPolarisation of light.Polarizer is converted to transmittance with light polarization.

By repeating this process, all gate lines G ₁-G _nProvided gate-on voltage Von in regular turn in an image duration, applied data voltage to all pixels thus.When next frame began after finishing a frame, the reverse control signal RVS Be Controlled that is applied to data driver 500 made the polarity of data voltage be inverted (being called " frame counter-rotating ").Described reverse control signal RVS also can Be Controlled makes the polarity of the data voltage that flows in the data line in a frame be inverted (being called " line counter-rotating "), and perhaps the polarity of the data voltage in a grouping is inverted (being called " point reverses ").

Though more than describe the preferred embodiments of the present invention in detail, but should clearly understand, those skilled in the art as can be seen, in many variations of this basic inventive concept of teaching and/or revise in the spirit and scope of the present invention that still fall within defined in the appended claim.

Claims

1. A liquid crystal display, comprising:

An array of alternating first and second rows of pixels, each first row comprising sequentially arranged red, blue and green pixels or red, green and blue pixels, each second row comprising sequentially arranged red, blue, and green pixels or red, green, and blue pixels, and have an arrangement shifted by one pixel from the first row, and each pixel includes: a pixel electrode and a thin film transistor;

a plurality of gate lines extending in the row direction for sending gate signals to the pixels; and

A plurality of data lines extend in the column direction and are used to send data signals to the pixels.

2. The liquid crystal display according to claim 1, wherein said liquid crystal display is presented.

3. The liquid crystal display according to claim 2, wherein the pixel group for rendering includes a central pixel and a plurality of peripheral pixels having a weight depending on the distance from the central pixel.

4. The liquid crystal display according to claim 3, wherein said weighting becomes larger as the distance from the central pixel increases.

5. The liquid crystal display of claim 1, wherein each data line includes a connection portion for receiving a data signal from an external device.

6. The liquid crystal display according to claim 1, further comprising a passivation layer arranged between the pixel electrode and the gate line and the data line, formed of a low-dielectric material, and having a function for connecting the thin film transistor and the pixel. Multiple contact holes for electrodes.

7. A method for driving a liquid crystal display, the liquid crystal display comprising a plurality of pixels, the pixel comprising a plurality of conversion elements and a plurality of signal lines connected to the conversion elements, the method comprising:

weighting pixels for rendering according to a pixel group comprising a central pixel and a plurality of peripheral pixels, whereby the weighting of the pixels depends on the distance from the central pixel;

providing a data voltage to the data line, the data voltage having a value dependent on the weight; and

The conversion element is turned on to send a data voltage to the pixel electrode.

8. The liquid crystal display according to claim 7, wherein said weighting becomes larger as the distance from said central pixel increases.