CN1924647A

CN1924647A - Liquid crystal display device, module for driving the same and method of driving the same

Info

Publication number: CN1924647A
Application number: CNA2006101087972A
Authority: CN
Inventors: 金一坤; 金雄植; 朴泰炯; 文国哲; 崔弼模; 宋锡天; 李相勋; 朴根佑; 孟昊奭
Original assignee: Samsung Electronics Co Ltd
Current assignee: Samsung Electronics Co Ltd
Priority date: 2005-08-30
Filing date: 2006-08-16
Publication date: 2007-03-07
Also published as: KR20070027941A

Abstract

A liquid crystal display ('LCD') device includes an LCD panel and a driving module. The LCD panel includes a plurality of pixel parts, each including a transmitting portion and a reflecting portion. The transmitting portion has a first switching element electrically connected to a first gate line, and a first liquid crystal capacitor electrically connected to the first switching element. The reflecting portion has a second switching element electrically connected to a second gate line, and a second liquid crystal capacitor electrically connected to the second switching element. The driving module applies a first common voltage to the first liquid crystal capacitor during turning-on of the first switching element, and applies a second common voltage to the second liquid crystal capacitor during turning-on of the second switching element. Therefore, an image display quality is improved.

Description

Liquid crystal display, be used to drive the module and the method for this liquid crystal display

Technical field

The method that the present invention relates to liquid crystal display (" LCD ") equipment, is used to drive the module of LCD equipment and is used to drive LCD equipment.More specifically, the present invention relates to improve the LCD equipment of image displaying quality, the method that is used to drive the module of this LCD equipment and is used to drive this LCD equipment.

Background technology

Liquid crystal display (" LCD ") equipment comprises the LCD plate, and this LCD plate comprises infrabasal plate, upper substrate and is inserted in liquid crystal layer between this infrabasal plate and the upper substrate.The liquid crystal response of liquid crystal layer changes arrangement in the electric field that applies to it, thereby changes the light transmission of liquid crystal layer, thus display image.

The LCD plate is divided into reflection type LCD plate, transmission-type LCD plate and semi-reflection-type (transflective) LCD plate based on light source.In the reflection type LCD plate, the light that provides from the reflection type LCD plate reflection external world is with display image.In transmission-type LCD plate, the light that provides from the inside of the rear side of the transmission-type LCD plate of backlight assembly by transmission-type LCD plate with display image.In semi-reflection-type LCD plate, from the extraneous light that provides of semi-reflection-type LCD plate reflection, and the inner light that provides is by semi-reflection-type LCD plate, thus display image.

In semi-reflection-type (transflective) LCD plate, the voltage transmissivity of transmission mode (" V-T ") curve is different from voltage reflection (" the V-R ") curve of reflective-mode.

Figure 1A is the figure of the relation between voltage and the transmissivity in graphic extension perpendicular alignmnet (" the VA ") pattern.Figure 1B is the figure of the relation between voltage and the reflectivity in the graphic extension VA pattern.

With reference to Figure 1A and 1B, the black voltage VTb of transmission mode equals the black voltage VRb of reflective-mode substantially.Each the black voltage VTb and the VRb of transmission and reflective-mode are approximately 0V to 1.5V.Yet the white appliances that the white appliances of transmission mode press VTw to be different from reflective-mode are pressed VRw.The white appliances of transmission mode press VTw to be approximately 4.5V, and the white appliances of reflective-mode press VRw to be approximately 2.5V.The white appliances of transmission mode and reflective-mode press the difference between VTw and the VRw to be approximately 2V.

When the transmissivity of V-T curve was different from the reflectivity of V-R curve, the image displaying quality of semi-reflection-type LCD equipment can reduce.

Summary of the invention

The invention provides a kind of liquid crystal display (" LCD ") equipment that improves image displaying quality.

The present invention also provides a kind of module that is used to drive above-mentioned LCD equipment.

The present invention also provides a kind of method that is used to drive above-mentioned LCD equipment.

Exemplary L CD equipment comprises LCD plate and driver module according to an exemplary embodiment of the present invention.The LCD plate comprises a plurality of pixel components.Each pixel component comprises transmission part and reflecting part.Transmission partly has first on-off element that is electrically connected to first grid polar curve and first liquid crystal capacitor that is electrically connected to first on-off element.The reflecting part has the second switch element that is electrically connected to the second grid line and is electrically connected to second liquid crystal capacitor of second switch element.Driver module is applied to first liquid crystal capacitor in the conduction period of first on-off element with first common electric voltage, and in the conduction period of second switch element second common electric voltage is applied to second liquid crystal capacitor.

The exemplary L CD equipment of other exemplary embodiments comprises LCD plate and driver module according to the present invention.The LCD plate comprises a plurality of pixel components.Each pixel component comprises transmission part and reflecting part.Transmission partly has first on-off element that is electrically connected to first grid polar curve and first liquid crystal capacitor that is electrically connected to first on-off element.The reflecting part has the second switch element that is electrically connected to the second grid line and is electrically connected to second liquid crystal capacitor of second switch element.Driver module is applied to first liquid crystal capacitor in the conduction period of first on-off element with first common electric voltage, and in the conduction period by with the second switch element of first on-off element second common electric voltage is applied to second liquid crystal capacitor.

According to exemplary embodiment of the present invention, a kind of exemplary driver module that is used to drive the exemplary L CD equipment that comprises a plurality of pixel components comprises drive element of the grid and voltage generating unit.Each pixel component comprises the transmission part of first liquid crystal capacitor that has first on-off element that is electrically connected to first grid polar curve and be electrically connected to first on-off element and has the second switch element that is electrically connected to the second grid line and be electrically connected to the reflecting part of second liquid crystal capacitor of second switch element.Drive element of the grid output activates the first grid signal and the second grid signal of first and second gate lines respectively.Voltage generating unit is applied to first liquid crystal capacitor with first common electric voltage between the active period of first grid polar curve, and during the deactivation of first grid polar curve second common electric voltage is applied to second liquid crystal capacitor.

According to exemplary embodiment of the present invention, provide a kind of illustrative methods that is used to drive the exemplary liquid crystal display that comprises pixel component below.Pixel component comprises the transmission part of first liquid crystal capacitor that has first on-off element and be electrically connected to first on-off element and has the second switch element and be electrically connected to the reflecting part of second liquid crystal capacitor of second switch element.Conducting first on-off element, so as with first liquid crystal capacitor that charges from the first corresponding pixel voltage of the data voltage of first on-off element and the voltage difference between first common electric voltage.By first on-off element and conducting second switch element, so as with second liquid crystal capacitor that charges from the second corresponding pixel voltage of the data voltage of second switch element and the voltage difference between second common electric voltage.

According to other exemplary embodiment of the present invention, provide a kind of illustrative methods that is used to drive the exemplary liquid crystal display that comprises pixel component below.Pixel component comprises transmission part and reflecting part, described transmission partly has first on-off element and is electrically connected to first liquid crystal capacitor of first on-off element, second liquid crystal capacitor that described reflecting part has the second switch element, is electrically connected to the arc chamber capacitor of second switch element and is electrically connected to the arc chamber capacitor.Conducting first on-off element, so as with first liquid crystal capacitor that charges from the first corresponding pixel voltage of the data voltage of first on-off element and the voltage difference between first common electric voltage.By first on-off element and conducting second switch element, so as with second liquid crystal capacitor that charges from the second corresponding pixel voltage of the data voltage of second switch element and the voltage difference between second common electric voltage.

According to the present invention, first common electric voltage is applied to first liquid crystal capacitor of transmission part, and second common electric voltage is applied to second liquid crystal capacitor of reflecting part, so that improve the display quality of the image that shows in pixel component.

Description of drawings

By exemplary embodiment of the present invention is described with reference to the drawings, of the present invention above and other advantages will become more obvious, wherein:

Figure 1A is the figure that is illustrated in the relation between the voltage and transmissivity in perpendicular alignmnet (vertical alignment, " the VA ") pattern;

Figure 1B is the figure that is illustrated in the relation between the voltage and reflectivity in the VA pattern;

Fig. 2 is the planimetric map of the exemplary according to an exemplary embodiment of the present invention liquid crystal display of graphic extension (" LCD ") equipment;

Fig. 3 is the planimetric map of the part of the exemplary L CD plate shown in graphic extension Fig. 2;

Fig. 4 is the viewgraph of cross-section along the intercepting of the line I-I ' shown in Fig. 3;

Fig. 5 is the block scheme of the exemplary main driver element shown in graphic extension Fig. 2;

Fig. 6 is the block scheme of the exemplary gate polar circuit unit shown in graphic extension Fig. 2;

Fig. 7 is the block scheme of the exemplary source electrode driver element shown in graphic extension Fig. 5;

Fig. 8 is the sequential chart that the illustrative methods of the exemplary source electrode drive unit drives exemplary L CD equipment shown in Fig. 7 is used in graphic extension;

Fig. 9 is the block scheme of the exemplary source electrode driver element of graphic extension another exemplary embodiment according to the present invention;

Figure 10 is the sequential chart that the illustrative methods of the exemplary source electrode drive unit drives exemplary L CD equipment shown in Fig. 9 is used in graphic extension;

Figure 11 A is the V-T curve of LCD equipment of graphic extension VA pattern and the figure of V-R curve, and Figure 11 B is the V-T curve of graphic extension exemplary L CD equipment of another exemplary embodiment, VA pattern according to the present invention and the figure of V-R curve;

Figure 12 is the planimetric map of the exemplary L CD equipment of graphic extension another exemplary embodiment according to the present invention;

Figure 13 is the block scheme of the exemplary main driver element shown in graphic extension Figure 12;

Figure 14 is the sequential chart that graphic extension is used to drive the illustrative methods of the exemplary L CD equipment shown in Figure 12; With

Figure 15 is the V-T curve of graphic extension another exemplary embodiment, exemplary L CD equipment according to the present invention and the figure of V-R curve.

Embodiment

Hereinafter will more fully describe the present invention with reference to the accompanying drawings, exemplary embodiment of the present invention has been shown in the accompanying drawing.Yet the present invention can embody with many different forms, and should not be misinterpreted as the embodiment that is limited to this place elaboration.On the contrary, provide these embodiment, thereby the disclosure will be thoroughly comprehensive, and will express scope of the present invention fully to those of ordinary skill in the art.In the accompanying drawing, for clear, can amplification layer and the size and the relative size in district.

Be appreciated that when claim an element or layer be known as " ... on ", " connections " or " coupling " during to another element or layer, it can directly connect or be coupled to this another element or layer, perhaps may exist middle element or layer.On the contrary, when claim an element be known as " directly exist ... on ", " when being directly connected " or " directly coupled " to another element or layer, element in the middle of not existing or layer.Identical numbering is represented components identical in full.As used herein, term " and/or " comprise listed term that one or more is relevant arbitrarily and all combinations.

Though be appreciated that may use the term first, second, third, etc. to wait describes each element, assembly, zone, layer and/or part herein, these elements, assembly, zone, layer and/or part should not be subjected to the restriction of these terms.These terms only are used for distinguishing each element, assembly, zone, layer or part.For example, first element, assembly, zone, layer or the part of discussing below can be called second element, assembly, zone, layer or part, and can not break away from this clearly demarcated scope.

The term of relativity, for example " ... down " or " bottom " and " ... on " or " top ", can be used to herein describe as shown in FIG. an element and the relation of another element.Should be appreciated that the term of relativity is intended to comprise the different azimuth of the device except the orientation shown in the accompanying drawing.For example, if the upset of the device in accompanying drawing, the element that then is described as be in other element D score sides will be positioned in subsequently other elements " on " side.Therefore, exemplary term " ... down " can comprise " and ... down " and " ... on " two kinds of orientation.Equipment can be located (revolve turn 90 degrees or in other orientation) on the contrary, and herein correspondingly version space describe relatively.

The term of Shi Yonging is used to describe the purpose of specific embodiment herein, rather than will limit the present invention.The singulative of Shi Yonging also will comprise plural form herein, unless other indication clearly made in context.Should also be appreciated that: the term that uses in this instructions " comprises " and/or " comprising " or " having " indicates feature, zone, integer, step, operation, element and/or the assembly that existence is stated, does not have other one or more features, zone, integer, step, operation, element, assembly and/or its group but do not get rid of.

Reference is herein described embodiments of the invention as the cross-sectional illustration of the schematic illustration of desirable embodiment of the present invention (and intermediate structure).Therefore, as the result of for example manufacturing technology and/or tolerance, can expect the variation of various shape shown.Therefore, embodiments of the invention should not be misinterpreted as the given shape that is limited to zone described herein, but can comprise the variation of the shape that for example manufacturing causes.For example, diagram or describedly can have the gradient of circle or shaped form feature and/or implantation concentration (implant concentratoin) rather than from being injected into the scale-of-two variation of non-injection zone in its edge usually for the zone on plane.Similarly, can cause some injections in the zone between ground region and the surface that injection takes place by the ground region that inject to form.Therefore, the regional essence shown in the accompanying drawing is that schematically their shape is not the accurate shape that is intended to declare area, and is not intended to demonstration scope of the present invention.

Unless otherwise defined, otherwise herein all terms (comprising technology and scientific term) that use all have and the identical implication of the technical field of the invention those of ordinary skill common sense.Should also be appreciated that: the term that defines in common dictionary should be understood that to have the implication consistent with its implication in the correlation technique context, and should not explain with the idealized or too formal meaning, unless clearly definition is like this herein.

Hereinafter, will describe the present invention with reference to the accompanying drawings in detail.

Fig. 2 is the planimetric map of the exemplary according to an exemplary embodiment of the present invention liquid crystal display of graphic extension (" LCD ") equipment.

With reference to figure 2, LCD equipment comprises LCD plate 100, driver module 200 and flexible printed circuit board (" FPC ") 300.Driver module 200 is electrically connected to the external module (not shown) by FPC 300.

LCD plate 100 comprises infrabasal plate 110, upper substrate 120 and liquid crystal layer 130 (as shown in Figure 4).Upper substrate 120 is corresponding to infrabasal plate 110.Liquid crystal layer 130 is inserted between infrabasal plate 110 and the upper substrate 120.LCD plate 100 comprises viewing area DA and the external zones PA that centers on viewing area DA.

In the DA of viewing area, form from main driver element 210 beginnings first party upwardly extending many source electrode line DL1, DL2 ..., DLm (being also referred to as data line) and from the grid circuit unit 230 beginnings with vertical substantially second party upwardly extending many gate lines G L1, the GL2 of first direction ..., GL2n (being also referred to as sweep trace).Source electrode line DL1, DL2 ..., the quantity of DLm and gate lines G L1, GL2 ..., the quantity of GL2n is respectively " m " and " 2n ", wherein " m " and " n " is natural number.Source electrode line DL1, DL2 by matrix construction ..., DLm and gate lines G L1, GL2 ..., GL2n limits a plurality of pixel component P in the DA of viewing area.The quantity of pixel component P is m * n.

Each pixel component P comprises transmission part Pt and reflecting part Pr.Transmission part Pt and reflecting part Pr are limited by two gate lines G Lt and GLr and a source electrode line DL.The first bundle light passes transmission part Pt, for example passes infrabasal plate 110 and upper substrate 120.The second bundle light for example at first passes upper substrate 120, yet is reflected back toward by upper substrate 120 from reflecting part Pr reflection.Transmission part Pt comprises the first on-off element TFTt, the first liquid crystal capacitor CLCt and the first holding capacitor CSTt.The first on-off element TFTt can be thin film transistor (TFT) (" TFT ").The first on-off element TFTt is electrically connected to source electrode line DL and first grid polar curve GLt.The first on-off element TFTt comprises source electrode that is connected with source electrode line DL and the grid that is connected with first grid polar curve GLt.The first liquid crystal capacitor CLCt and the first holding capacitor CSTt are electrically connected to the first on-off element TFTt.The first on-off element TFTt comprises the drain electrode that is electrically connected with the first liquid crystal capacitor CLCt.

Reflecting part Pr comprises second switch elements T FTr, the second liquid crystal capacitor CLCr and the second holding capacitor CSTr.Second switch elements T FTr also can be thin film transistor (TFT) (" TFT ").Second switch elements T FTr is electrically connected to source electrode line DL and second grid line GLr.Second switch elements T FTr comprises source electrode that is connected with source electrode line DL and the grid that is connected with second grid line GLr.The second liquid crystal capacitor CLCr and the second holding capacitor CSTr are electrically connected to second switch transistor T FTr.Second switch elements T FTr comprises and is used for the drain electrode that is electrically connected with the second liquid crystal capacitor CLCr.

Driver module 200 comprises main driver element 210 and grid circuit unit 230.

Main driver element 210 can comprise the chip among the external zones PA, so that based on control signal and the data-signal from FPC 300 drive signal is applied to pixel component P.Main driver element 210 can be positioned on the infrabasal plate 110.

Grid circuit unit 230 can be integrated into external zones PA.Perhaps, grid circuit unit 230 can comprise the chip among the external zones PA.Grid circuit unit 230 based on the drive signal of coming autonomous driver element 210 with signal G1t, G1r, G2t, G2r ... Gnt and Gnr be applied to gate lines G L1, GL2 ..., GL2n.For example, during a horizontal cycle 1H, can with signal G1t, G1r, G2t, G2r ... the first and second signal G1t and the G1r of Gnt and Gnr are applied to pixel component P.For example, the 1H cycle can be 1 frame.Perhaps, the 1H cycle can be the effective display cycle as a part of frame.

Fig. 3 is the planimetric map of the part of the exemplary L CD plate shown in graphic extension Fig. 2.Fig. 4 is the viewgraph of cross-section along the intercepting of the line I-I ' shown in Fig. 3.

With reference to figs. 2 to 4, the LCD plate comprises infrabasal plate 110, upper substrate 120 and liquid crystal layer 130.

Infrabasal plate 110 comprises first bottom (base) substrate 101, and it comprises the insulating material such as glass or plastics etc.First bottom substrate 101 comprise by source electrode line DL1, DL2 ..., DLm and gate lines G L1, GL2 ..., the pixel component P that limits of GL2n.As discussed previously, source electrode line DL1, DL2 ..., the quantity of DLm and gate lines G L1, GL2 ..., the quantity of GL2n is respectively " m " and " 2n ".The quantity of pixel component P is m * n.

Each pixel component P comprises transmission part Pt and reflecting part Pr.Pass transmission part Pt among the transmission area TA from the first bundle light L1 at first bottom substrate 101 (for example, from backlight assembly) rear portion.The second reflecting part Pr reflection of bundle light L2 from the RA of echo area from first bottom substrate, 101 front portions the front portion of LCD plate 100 (for example, from).In pixel component P, also can form storage concentric line SCL.

Transmission part Pt comprises the first on-off element TFTt and transmission electrode TE.The first on-off element TFTt comprises first grid 131, first source electrode 133 and first drain electrode 134.The first grid 131 of the first on-off element TFTt is electrically connected to first grid polar curve GLt.First source electrode 133 of the first on-off element TFTt is electrically connected to source electrode line DL.First drain electrode 134 of the first on-off element TFTt is electrically connected to transparency electrode TE.

On first grid polar curve GLt and first grid 131, form gate insulator 102, and exposed portion (exposed portion) and second grid line GLr, second grid and storage concentric line SCL at first bottom substrate 101 go up formation gate insulator 102, will be further described below.On the first grid 131 of the first on-off element TFTt between first source electrode 133 of the first on-off element TFTt and first drain electrode 134, form first active layer 132.For example, first active layer 132 comprises amorphous silicon (" a-Si ").

In source electrode line DL, first source electrode 133 and first drain electrode 134, form passivation layer 103 and organic insulator 104, and forming passivation layer 103 and organic insulator 104 in exposed portion, second source electrode and second drain electrode of gate insulator 102, will be further described below.Passivation layer 103 and organic insulator 104 comprise first contact hole 137 that makes first drain electrode, 134 exposures.Perhaps, can omit organic insulator 104.Transparency electrode TE is provided on organic insulator 104,, then on passivation layer 103, provides transparency electrode TE if perhaps omit organic insulator 104.First drain electrode 134 is electrically connected to transparency electrode TE by first contact hole 137.

Reflecting part Pr comprises second switch elements T FTr and reflecting electrode RE.Second switch elements T FTr comprises second grid 141, second source electrode 143 and second drain electrode 144.The second grid 141 of second switch elements T FTr is electrically connected to second grid line GLr.Second source electrode 143 of second switch elements T FTr is electrically connected to source electrode line DL.Second drain electrode 144 of second switch elements T FTr is electrically connected to reflecting electrode RE.

On second grid line GLr and second grid 141, be gate insulator 102.On the second grid 141 of the second switch elements T FTr between second source electrode 143 of second switch elements T FTr and second drain electrode 144, form second active layer 142.For example, second active layer 142 comprises a-Si.

In source electrode line DL, second source electrode 143 and second drain electrode 144, form passivation layer 103 and organic insulator 104.Passivation layer 103 and organic insulator 104 further comprise second contact hole 147 that makes second drain electrode, 144 exposures.Perhaps, can omit organic insulator 104.Cremasteric reflex electrode RE on organic insulator 104 is if perhaps omit organic insulator 104, then cremasteric reflex electrode RE on passivation layer 103.Second drain electrode 144 is electrically connected to reflecting electrode RE by second contact hole 147.

On first bottom substrate 101, store concentric line SCL according to forming with the first and second gate lines G Lt and the essentially identical metal level of GLr.

In Fig. 1 to 3, each

active layer

132 and 142 of the first and second on-off element TFTt and TFTr all is described to comprise a-Si.Perhaps, each active layer of the first and second on-off element TFTt and TFTr can comprise polysilicon.

Upper substrate 120 comprises second bottom substrate 121, black matrix" 122, colour filter 123, protective finish 124 and public electrode 125.On second bottom substrate 121, can form black matrix" 122, colour filter 123, protective finish 124 and public electrode 125 successively.

Black matrix" 122 stops the part of the first and second bundle light L1 and L2.Particularly, with source electrode line DL, the first and second gate lines G Lt and GLr, the first and second on-off element TFTt and TFTr and transmission part Pt and reflecting part Pr between the corresponding zone of interface on form black matrix" 122.

Colour filter 123 is corresponding to pixel component P, and comprises red optical filtering pattern, green optical filtering pattern and blue optical filtering pattern, although other colors that are used for colour filter 123 are all in the scope of these embodiment.Colour filter 123 comprises a part of corresponding photohole with reflecting part Pr.Photohole sends the first bundle light L1, thereby the first bundle light L1 that passes transmission part Pt has and the essentially identical brightness of the second bundle light L2 that comes from reflecting part Pr reflection.

Protective finish 124 is positioned on the colour filter 123 in order to protecting this colour filter 123, and to having second bottom substrate, 121 complanations (planarize) of black matrix" 122 and colour filter 123.

Public electrode 125 is used to limit first liquid crystal capacitor CLCt corresponding with the transmission part Pt of pixel component P and the second liquid crystal capacitor CLCr corresponding with the reflecting part Pr of pixel component P corresponding to transparency electrode TE and reflecting electrode RE.Public electrode 125 can cover whole area, perhaps can cover the whole zone of upper substrate 120 substantially.

Liquid crystal layer 130 has perpendicular alignmnet (" VA ") pattern.When applying the electric field of constant intensity between public electrode 125 and transparent and reflecting electrode TE and RE, the liquid crystal of liquid crystal layer 130 is shown black image by perpendicular alignmnet.

Fig. 5 is the block scheme of the exemplary main driver element shown in graphic extension Fig. 2.

With reference to figure 2 and 5, main driver element 210 comprises that control assembly 211, storer 213, voltage generate parts 215 and source drive unit 270.

Control assembly 211 receives from the outside to the control assembly 211 data-signal 210a and control signal 210b.Control signal 210b comprises horizontal-drive signal, vertical synchronizing signal, master clock signal and data enable signal.

Control assembly 211 is read and write the data-signal 210a on the storer 213 based on control signal 210b.Control assembly 211 is applied to grid circuit unit 230 with grid control signal 211a, will further describe in Fig. 6.Grid control signal 211a comprises vertical start signal STV, the first clock signal C K, second clock signal CKB and grid voltage VSS.

Control assembly 211 is applied to source drive unit 270 with source control signal 211b, and will be applied to source drive unit 270 from the data-signal 211d that storer 213 reads.Source control signal 211b comprises vertical start signal, load signal and reverse signal.

Control assembly 211 will comprise that the control signal 211c of master clock signal, reverse signal etc. is applied to voltage and generates parts 215.

Voltage generates parts 215 and generates driving voltage based on the power supply 210c that the outside provides.Driving voltage comprises grid voltage (VSS, VDD) 215a, reference gray level (gamma) voltage (VREF) 215b and common electric voltage (VCOM) 215c.Voltage generates the public electrode 125 that parts 215 are applied to grid voltage 215a, reference gray level voltage 215b and common electric voltage 215c respectively control assembly 211, source drive unit 270 and upper substrate 120.

Voltage generates parts 215 are applied to the first common electric voltage VCOMt the first liquid crystal capacitor CLCt during the first of 1H first public electrode, so that activate first grid polar curve GLt, and during the second portion of 1H, the second common electric voltage VCOMr is applied to second public electrode of the second liquid crystal capacitor CLCt, so that activate second grid line GLr.First public electrode can be electrically connected to second public electrode, and first public electrode and second public electrode can be the parts of public electrode 215.

Voltage difference between the first common electric voltage VCOMt and the second common electric voltage VCOMr equals the voltage difference between the crest voltage Rw of the crest voltage Tw of V-T curve and V-R curve substantially.For example, in Figure 1A and 1B, the crest voltage Rw of the crest voltage Tw of V-T curve and V-R curve is approximately 4.5V and 2.5V respectively, and the voltage difference between the first and second common electric voltage VCOMt and the VCOMr is approximately 2V.

Based on reference gray level voltage VREF 215b, source drive unit 270 will be converted to from the data-signal 211d that storer 213 reads analog data voltage D1, D2 ... Dm, so as with analog data voltage D1, D2 ... Dm be applied to source electrode line DL1, DL2 ... DLm.Source electrode line DL1, DL2 ... DLm is formed on the infrabasal plate 110.

Fig. 6 is the block scheme of the exemplary gate polar circuit unit shown in graphic extension Fig. 2.

With reference to figure 2 and 6, grid circuit unit 230 comprises first shift register, this shift register have the be connected in parallel to each other a plurality of grades of SRC1, the SRC2 that are electrically connected ... SRC2n+1.Level SRC1, SRC2 ... the quantity of SRC2n+1 approximately is 2n+1.Level SRC1, SRC2 ... SRC2n+1 comprise a plurality of driving stage SRC1, SRC2 ... SRC2n and puppet (dummy) grade SRC2n+1.Driving stage SRC1, SRC2 ... the quantity of SRC2n can equal gate lines G L1, GL2 ... the quantity of GL2n.

Each grade SRC1, SRC2 ... SRC2n+1 comprises input end IN, clock end CK, voltage end VSS, control end CT, the first output terminal GOUT and the second output terminal SOUT.

Clock end CK receives the first clock signal C K and second clock signal CKB.The first clock signal C K be applied to odd level SRC1, SRC3 ... SRC2n+1.Second clock signal CKB be applied to even level SRC2, SRC4 ... SRC2n.

Odd level SRC1, SRC3 ... the first output terminal GOUT of SRC2n+1 will with synchronous signal G1t, the G2t of the first clock signal C K ... Gnt outputs to the odd gates line that is connected with the first on-off element TFTt.Even level SRC2, SRC4 ... the first output terminal GOUT of SRC2n will with synchronous signal G1r, the G2r of second clock signal CKB ... Gnr outputs to the even number gate line that is connected with second switch elements T FTr.

The first output terminal GOUT of first order SRC1 and follow-up odd level is electrically connected to the first grid polar curve GLt of transmission part Pt, so that control the operation of the first on-off element TFTt.The first output terminal GOUT of second level SRC2 and follow-up even level is electrically connected to the second grid line GLr of reflecting part Pr, so that the operation of control second switch elements T FTr.

In Fig. 2 to 6, first order SRC1 is applied to first grid polar curve GLt with first grid signal G1t during the initial H/2 cycle in 1H cycle.Second level SRC2 is applied to second grid line GLr with second grid signal G1r during the back H/2 cycle in 1H cycle.Therefore, level SRC1, SRC2 ... SRC2n with signal G1t, G1r, G2t, G2r ... Gnt and Gnr are applied to gate line respectively.

The first output terminal GOUT of pseudo-level SRC2n+1 is not electrically connected to the gate line that will float.

Odd level SRC1, SRC3 ... each of SRC2n+1 second output terminal SOUT exports the first clock signal C K as the level drive signal.In addition, even level SRC2, SRC4 ... each of SRC2n second output terminal SOUT output second clock signal CKB is as the level drive signal.

Odd level SRC1, SRC3 ... the input end IN of each receives from the level drive signal of the second output terminal SOUT output of previous stage among the SRC2n+1.Odd level SRC1, SRC3 ... the control end CT of each among the SRC2n+1 receives from the level drive signal of next stage output.

First order SRC1 does not have previous stage, so the input end IN of first order SRC1 receives vertical start signal STV.In addition, do not have next stage as a pseudo-level SRC2n+1 of last grade, therefore the control end CT of pseudo-grade SRC2n+1 receives vertical start signal STV.

Level SRC1, SRC2 ... each among the SRC2n may further include the voltage end that receives grid cut-off voltage VSS.

Fig. 7 is the block scheme of the exemplary source electrode driver element shown in graphic extension Fig. 5.

With reference to figure 5 and 7, source drive unit 270 comprises sampling locking (latch) parts 271, level shift parts 272, keeps Lock Part 273, digital-to-analogue conversion parts 274 and output buffer unit 275.

Sampling Lock Part 271 comprises a plurality of sampling lock SL, be used for locking successively a plurality of data-signal R1s corresponding, G1, B1, R2, G2, B2 with the 1H cycle ... Rk, Gk and Bk.Blocked data-signal R1, G1, B1, R2, G2, B2 ... Rk, Gk and Bk are from control assembly 211.

Level shift parts 272 comprise a plurality of level shifter LS.Level shift parts 272 will from data-signal R1, the G1 of the output of sampling Lock Part 271, B1, R2, G2, B2 ... the level of Rk, Gk and the Bk predetermined level that is shifted respectively.

Keep Lock Part 273 to comprise a plurality of maintenance lock HL.Keep Lock Part 273 to lock successively, so that guide blocked data-signal based on source control signal 211b from control assembly 211 outputs from the data-signal of level shift parts 272 outputs.

Digital-to-analogue conversion parts 274 comprise a plurality of digital analog converter DAC, being used for based on reference gray level voltage VREF 215b will be analog data voltage from the loading data conversion of signals that keeps Lock Part 272 to load, so that analog data voltage is applied to output buffer unit 275.

Output buffer unit 275 comprises a plurality of amplifier A, be used for amplifying from digital-to-analogue conversion parts 274 with predetermined level output to respectively source electrode line DL1, DL2, DL3 ... the analog data voltage of DLm-2, DLm-1 and DLm.

Fig. 8 is the sequential chart that the illustrative methods of the exemplary source electrode drive unit drives exemplary L CD equipment shown in Fig. 7 is used in graphic extension.

With reference to Figure 1A to 8, during the 1H cycle, source drive unit 270 will be converted to from the data-signal 211d of control assembly 211 source electrode line DL1, DL2 ... the analog data voltage DATA 0 of DLm.For example, source drive unit 270 comes inverted data signal 211d by the circuit inverting method during the 1H cycle, and with data-signal 211d be applied to source electrode line DL1, DL2 ... DLm.

Particularly, source drive unit 270 generates the first horizontal data voltage 1L_0.Grid circuit unit 230 generates the first horizontal first grid signal G1t during the initial H/2 cycle in 1H cycle.In addition, voltage generates parts 215 are applied to the first common electric voltage VCOMt upper substrate 120 during the initial H/2 cycle in 1H cycle public electrode 125.

Therefore, the first on-off element TFTt of transmitting member Pt is based on first grid signal G1t and conducting, so as will with the transparency electrode TE that is applied to the first liquid crystal capacitor CLCt from the corresponding voltage of the data voltage of source electrode line DL.Transparency electrode TE is first electrode of the first liquid crystal capacitor CLCt.The first common electric voltage VCOMt is applied to public electrode 125.Public electrode 125 is second electrodes of the first liquid crystal capacitor CLCt.

The first pixel voltage VPt corresponding with the voltage difference between transparency electrode TE and the public electrode 125 is stored among the first liquid crystal capacitor CLCt.

Source drive unit 270 generates the first horizontal data voltage 1L_0 then.Grid circuit unit 230 generates the first horizontal second grid signal G1r during the back H/2 cycle in 1H cycle.In addition, voltage generates parts 215 are applied to the second common electric voltage VCOMr upper substrate 120 during the back H/2 cycle in 1H cycle public electrode 125.

Just, during the H/2 cycle of back, the first on-off element TFTt of transmission part Pt ends, and the second switch elements T FTr conducting of reflecting part Pr.

Therefore, the second switch elements T FTr of reflecting part Pr is based on second grid signal G1r and conducting, so as will with the reflecting electrode RE that is applied to the second liquid crystal capacitor CLCr from the corresponding voltage of the data voltage of source electrode line DL.Reflecting electrode RE is first electrode of the second liquid crystal capacitor CLCr.The second common electric voltage VCOMr is applied to public electrode 125.Public electrode 125 is second electrodes of the second liquid crystal capacitor CLCr.

The second pixel voltage VPr corresponding with the voltage difference between reflecting electrode RE and the public electrode 125 is stored among the second liquid crystal capacitor CLCr.

In Fig. 8, the first pixel voltage VPt that stores among the first liquid crystal capacitor CLCt have be stored in the second liquid crystal capacitor CLCr in the different level of the second pixel voltage VPr.Refer again to Figure 1A and 1B, the voltage difference between the first common electric voltage VCOMt and the second common electric voltage VCOMr equals the voltage difference of the crest voltage Rw of the crest voltage Tw of V-T curve and V-R curve substantially.

For example, be approximately 4.5V and approximately during 2.5V, the voltage difference delta V between the first and second common electric voltage VCOMt and the VCOMr is about 2V as the crest voltage Rw of the crest voltage Tw of V-T curve and V-R curve.Particularly, when liquid crystal layer 130 was the VA pattern, the absolute value of the first common electric voltage VCOMt of the first liquid crystal capacitor CLCt that is applied to transmission part Pt was than the big voltage difference delta V of absolute value of the second common electric voltage VCOMr of the second liquid crystal capacitor CLCr that is applied to reflecting part Pr.

In Figure 1A to 8, during the initial H/2 cycle in 1H cycle, the first on-off element TFTt conducting that is electrically connected to first grid polar curve GL1t is to drive transmission part Pt.In addition, during the back H/2 cycle in 1H cycle, the first on-off element TFTt ends, and the second switch elements T FTr conducting of the second grid line GL1r that is electrically connected is to drive reflecting part Pr.

Perhaps, dotted line with reference to figure 8, the first and second on-off element TFTt and TFTr during the initial H/2 cycle conducting simultaneously to drive transmission and reflecting part Pt and Pr, and the first on-off element TFTt can end during the H/2 cycle of back, second switch elements T FTt keeps conducting simultaneously, to drive reflecting part Pr.According to this embodiment, the dotted line of Fig. 8 is corresponding to the second and the 4th signal G1r and G2r.

Fig. 9 is the block scheme of the exemplary source electrode driver element of graphic extension another exemplary embodiment according to the present invention.

With reference to figure 5 and 9, the source drive unit 270 of Fig. 5 has been replaced in source drive unit 370, and comprises sampling Lock Part 371, level shift parts 372, maintenance Lock Part 373, multiplexer (" MUX ") parts 374, digital-to-analogue conversion parts 375 and demultiplexer (" DEMUX ") parts 376.The sampling Lock Part 371 of Fig. 9, level shift parts 372 and maintenance Lock Part 373 can be basic identical with sampling Lock Part 271, level shift parts 272 and maintenance Lock Part 273 among Fig. 7.Therefore, with any further explanation of omitting about said elements.

A plurality of inputs that 374 combinations of MUX parts come self-sustaining Lock Part 373.Then, MUX parts 374 will be divided into a plurality of groups from the data-signal that keeps Lock Part 373 outputs.The output of the data-signal of MUX parts 374 each group of control.

Particularly, MUX parts 374 with data-signal R1, G1, B1 ... Rk, Gk and Bk be divided into red data group R1, R2 ... Rk, green data group G1, G2 ... Gk and blue data group B1, B2 ... Bk.MUX parts 374 control is red, green and data blue signal R1, G1, B1 ... the output of each among Rk, Gk and the Bk.

MUX parts 374 with red data group R1, R2 ... Rk is applied to the DAC of digital-to-analogue conversion parts 375, then with green data group G1, G2 ... Gk is applied to the DAC of digital-to-analogue conversion parts 375, afterwards with blue data group B1, B2 ... Bk is applied to the DAC of digital-to-analogue conversion parts 375.Therefore, the quantity of the DAC of the digital-to-analogue conversion parts 375 shown in Fig. 9 be approximately Fig. 7 the digital-to-analogue conversion parts DAC quantity 1/3rd.

DAC parts 375 with red data group R1, R2 ... Rk is converted to red analog data voltage, so that red analog data voltage is applied to DEMUX parts 376.DEMUX parts 376 by first output terminal with red analog data voltage be applied to source electrode line DL1, the DL4 corresponding with the red pixel parts ... DLm-2, this first output terminal be electrically connected to source electrode line DL1, the DL4 corresponding with the red pixel parts ... DLm-2.

Then DAC parts 375 with green data group G1, G2 ... Gk is converted to green analog data voltage, so that green analog data voltage is applied to DEMUX parts 376.DEMUX parts 376 by second output terminal with green analog data voltage be applied to source electrode line DL2, the DL5 corresponding with the green pixel parts ... DLm-1, this second output terminal be electrically connected to source electrode line DL2, the DL5 corresponding with the green pixel parts ... DLm-1.

Then DAC parts 375 with blue data group B1, B2 ... Bk is converted to blue analog data voltage, so that blue analog data voltage is applied to DEMUX parts 376.DEMUX parts 376 by the 3rd output terminal with blue analog data voltage be applied to source electrode line DL3, the DL6 corresponding with the blue pixel parts ... DLm, the 3rd output terminal be electrically connected to source electrode line DL3, the DL6 corresponding with the blue pixel parts ... DLm.

Therefore, be applied to source electrode line DL1, DL2 ... the data voltage of DLm is divided into redness, green and blue analog data voltage, and source drive unit 370 control with red analog data voltage be applied to gate line DL1, the DL4 corresponding with the red pixel parts ... DLm-2.Then source drive unit 370 control with green analog data voltage be applied to gate line DL2, the DL5 corresponding with the green pixel parts ... DLm-1.Then source drive unit 370 control with blue analog data voltage be applied to source electrode line DL3, the DL6 corresponding with the blue pixel parts ... DLm.

Figure 10 is the sequential chart that the illustrative methods of the exemplary source electrode drive unit drives exemplary L CD equipment shown in Fig. 9 is used in graphic extension.

With reference to Figure 1A, 5,6,9 and 10, source drive unit 370 during the 1H cycle, horizontal data-signal is converted to source electrode line DL1, DL2 ... the analog data voltage DATA_0 of DLm.Horizontal data-signal 211d is from control assembly 211.For example, source drive unit 370 makes data-signal 211d counter-rotating by circuit counter-rotating (line inversion) method during the 1H cycle, and with data-signal 211d be applied to source electrode line DL1, DL2 ... DLm.

Particularly, source drive unit 370 generates the first horizontal data voltage.Source drive unit 370 generates the first horizontal first grid signal G1t.In addition, voltage generates the public electrode 125 that parts 215 are applied to the first common electric voltage VCOMt upper substrate 120.Source drive unit 370 is divided into red data voltage group, green data voltage group and blue data voltage group by 3 * 1MUX method with horizontal data voltage 1L_0.

The first on-off element TFTt of transmission part Pt is based on first grid signal G1t and conducting, so as will with the transparency electrode TE that is applied to the first liquid crystal capacitor CLCt from the corresponding voltage of the data voltage of source electrode line DL.Transparency electrode TE is first electrode of the first liquid crystal capacitor CLCt.The first common electric voltage VCOMt is applied to public electrode 125.Public electrode 125 is second electrodes of the first liquid crystal capacitor CLCt.

The data voltage 1L_0 corresponding with first horizontal line also exported in source drive unit 370 during the back H/2 cycle in 1H cycle.Grid circuit unit 230 generates the second grid signal G1r corresponding with first horizontal line during the back H/2 cycle in 1H cycle.In addition, voltage generates parts 215 are applied to the second common electric voltage VCOMr upper substrate 120 during the back H/2 cycle in 1H cycle public electrode 125.

Just, during the H/2 cycle of back, the first on-off element TFTt of transmission part Pt ends, the second switch elements T FTr conducting of reflecting part Pr.

In Figure 10, the first pixel voltage VPt that stores among the first liquid crystal capacitor CLCt have be stored in the second liquid crystal capacitor CLCr in the different level of the second pixel voltage VPr.Refer again to Figure 1A and 1B, the voltage difference between the first common electric voltage VCOMt and the second common electric voltage VCOMr equals the voltage difference between the crest voltage Rw of the crest voltage Tw of V-T curve and V-R curve substantially.

For example, be approximately 4.5V respectively and approximately during 2.5V, the voltage difference delta V between the first and second common electric voltage VCOMt and the VCOMr is about 2V as the crest voltage Rw of the crest voltage Tw of V-T curve and V-R curve.Particularly, when liquid crystal layer 130 was the VA pattern, the absolute value of the first common electric voltage VCOMt of the first liquid crystal capacitor CLCt that is applied to transmission part Pt was than the big voltage difference delta V of absolute value of the second common electric voltage VCOMr of the second liquid crystal capacitor CLCr that is applied to reflecting part Pr.

In Figure 1A, 5,6,9 and 10, during the initial H/2 cycle, the first on-off element TFTt conducting that is electrically connected to first grid polar curve GL1t is to drive transmission part Pt.In addition, during the H/2 cycle of back, the first on-off element TFTt ends, and the second switch elements T FTr conducting of the second grid line GL1r that is electrically connected is to drive reflecting part Pr.

Perhaps, dotted line with reference to Figure 10, the first and second on-off element TFTt and TFTr during the initial H/2 cycle conducting simultaneously to drive transmission and reflecting part Pt and Pr, and the first on-off element TFTt can end during the H/2 cycle of back, second switch elements T FTt keeps conducting simultaneously, to drive reflecting part Pr.According to this embodiment, the dotted line of Figure 10 is corresponding to the second and the 4th signal G1r and G2r.

Figure 11 A is the V-T curve of LCD equipment of graphic extension VA pattern and the figure of V-R curve, and Figure 11 B is the V-T curve of graphic extension exemplary L CD equipment of another exemplary embodiment, VA pattern according to the present invention and the figure of V-R curve.

Figure 11 A is the V-T curve of LCD equipment of the public electrode of graphic extension with the voltage that receives basic identical level and the figure of V-R curve.

With reference to figure 11A, in the V-T of VA pattern curve, light transmission increases to the voltage place between about 4.5V gradually at about 1.5V, and light transmission has maximum transmission rate at the voltage place of about 4.5V.Yet in the V-R of VA pattern curve, light transmission increases to the voltage place between about 2.5V gradually at about 1.5V, and reduces gradually at the voltage place greater than about 2.5V.

Therefore, in the grey scale curve as the mean value of V-R curve and V-T curve shown in Figure 11 A, light intensity increases gradually at the voltage place that is lower than about 2.5V, and is reducing gradually greater than the about voltage place of 2.5V.Therefore, LCD equipment can not show the image of white gray level.

Figure 11 B is the V-T curve of exemplary L CD equipment of the public electrode of graphic extension with the voltage that receives varying level and the figure of V-R curve.

With reference to figure 11B, in the V-T of VA pattern curve, light transmission increases gradually at the voltage place greater than about 1.5V, and light transmission has maximum transmission rate at the voltage place of about 4.5V.Yet in the V-R of VA pattern curve, light transmission increases gradually at the voltage place greater than about 2V, and has maximum reflectivity at the voltage place greater than about 3.5V.

Therefore, in the grey scale curve as the mean value of V-R curve and V-T curve, light intensity is increasing gradually greater than the about voltage place of 2V, and has maximum light intensity greater than the about voltage place of 4V.Therefore, LCD equipment can show the image of white gray level.

Figure 12 is the planimetric map of the exemplary L CD equipment of graphic extension another exemplary embodiment according to the present invention.

With reference to Figure 12, LCD equipment comprises LCD plate 500, driver module 600 and FPC 700.

LCD plate 500 comprises infrabasal plate 510, upper substrate 520 and liquid crystal layer (not shown).The liquid crystal layer (not shown) is inserted between infrabasal plate 510 and the upper substrate 520.The liquid crystal layer (not shown) has the VA pattern.When the electric field with constant intensity was applied to liquid crystal layer, the liquid crystal of liquid crystal layer was by perpendicular alignmnet.

LCD plate 500 comprises viewing area DA and is centered around viewing area DA external zones PA on every side.In the DA of viewing area, form from main driver element 610 beginnings first party upwardly extending many source electrode line DL1, DL2 ..., DLm (being known as data line) and from the grid circuit unit 630 beginnings with vertical substantially second party upwardly extending many gate lines G L1, the GL2 of first direction ..., GL2n (being known as sweep trace).Gate lines G L1, GL2 ..., GL2n and source electrode line DL1, DL2 ..., DLm intersects.Source electrode line DL1, DL2 ..., the quantity of DLm and gate lines G L1, GL2 ..., the quantity of GL2n is respectively " m " and " 2n ", wherein " m " and " n " is natural number.By source electrode line DL1, DL2 ..., DLm and gate lines G L1, GL2 ..., GL2n limits a plurality of pixel component P in the DA of viewing area.The quantity of pixel component P is approximately m * n.

Each pixel component P comprises transmission part Pt and reflecting part Pr.Transmission part Pt and reflecting part Pr are limited by first grid polar curve GLt, second grid line GLr and source electrode line DL.The first bundle light passes transmission part Pt, for example passes infrabasal plate 510 and upper substrate 520.The second bundle light for example at first passes upper substrate 520 from reflecting part Pr reflection, yet is passed through upper substrate 520 reflected backs.The liquid crystal layer (not shown) corresponding with transmission part Pt has the essentially identical arc chamber of the liquid crystal layer (not shown) gap with reflecting part Pr.

Transmission part Pt comprises the first on-off element TFTt, the first liquid crystal capacitor CLCt and the first holding capacitor CSTt.The first on-off element TFTt can comprise thin film transistor (TFT) (" TFT ").The first on-off element TFTt is electrically connected to source electrode line DL and first grid polar curve GLt.The first on-off element TFTt comprises source electrode that is connected with source electrode line DL and the grid that is connected with first grid polar curve GLt.The first liquid crystal capacitor CLCt and the first holding capacitor CSTt are electrically connected to the first on-off element TFTt.The first on-off element TFTt comprises the drain electrode that is electrically connected with the first liquid crystal capacitor CLCt.

Reflecting part Pr comprises second switch elements T FTr, arc chamber capacitor Cc, the second liquid crystal capacitor CLCr and the second holding capacitor CSTr.Second switch elements T FTr also can be thin film transistor (TFT) (" TFT ").Second switch elements T FTr is electrically connected to source electrode line DL and second grid line GLr.Second switch elements T FTr comprises source electrode that is connected with source electrode line DL and the grid that is connected with second grid line GLr.Arc chamber capacitor Cs is electrically connected to second switch elements T FTr.The second liquid crystal capacitor CLCr and arc chamber capacitor Cc are connected in series.The second holding capacitor CSTr is electrically connected to second switch transistor T FTr.Second switch elements T FTr comprises and is used for the drain electrode that is electrically connected with the second liquid crystal capacitor CLCr.

The public electrode of the first and second liquid crystal capacitor CLCt and CLCr is by mutual integrated composition, so that form the public electrode of the first and second liquid crystal capacitor CLCt and CLCr.First public electrode of the first holding capacitor CSTt is electrically connected to second public electrode of the second holding capacitor CSTr.

In the operation of each pixel portion P, the first on-off element TFTt is based on the activation of first grid polar curve GLt and conducting, thereby is applied to first electrode of the first liquid crystal capacitor CLCt from the data voltage of source electrode line DL.For example, first electrode of the first liquid crystal capacitor CLCt can be a transparency electrode.In addition, common electric voltage VCOM is applied to the public electrode of the first liquid crystal capacitor CLCt.The public electrode of the first liquid crystal capacitor CLCt is second electrode of the first liquid crystal capacitor CLCt.Therefore, with data voltage and common electric voltage VCOM between the corresponding first pixel voltage VPt of voltage difference be stored among the first liquid crystal capacitor CLCt of transmission part Pt.

With by the first on-off element TFTt, and second grid line GLr's first grid polar curve GLt is activated with conducting second switch elements T FTr by deactivation then.When second switch elements T FTr conducting, be applied to first electrode of the second liquid crystal capacitor CLCr from the data voltage of source electrode line DL.For example, first electrode of the second liquid crystal capacitor CLCr is a reflecting electrode.Common electric voltage VCOM is applied to the public electrode of the second liquid crystal capacitor CLCr.The public electrode of the second liquid crystal capacitor CLCr is second electrode of the second liquid crystal capacitor CLCr.In Figure 12, the integrated composition of public electrode of the public electrode of the first liquid crystal capacitor CLCt and the second liquid crystal capacitor CLCr, wherein public electrode can be formed on the upper substrate 520.

The part of data voltage is stored among the arc chamber capacitor Cc, and arc chamber capacitor Cc electricity is connected in series to the second liquid crystal capacitor CLCr.Therefore, the remainder of data voltage is stored among the second liquid crystal capacitor CLCr, thereby the second little pixel voltage VPr is stored among the second liquid crystal capacitor CLCr of reflecting part Pr than the first pixel voltage VPt.

Just, the electric capacity of arc chamber capacitor Cc is conditioned, thereby the difference between the voltage of the voltage of the white gray level of V-T curve and black gray level equals poor between the voltage of the voltage of white gray level of V-R curve and black gray level substantially.

In addition, the common electric voltage VCOM that regulates the public electrode be applied to the first and second liquid crystal capacitor CLCt and CLCr compensates the V-T that regulated and the off-set value of V-R curve.

Respectively the first common electric voltage VSTGt and the second common electric voltage VSTGr are applied to first and second public electrodes of the first and second holding capacitor CSTt and CSTr with the first and second common electric voltage VCOMt and the essentially identical mode of VCOMr.The common electric voltage VCOM that is applied to the first and second liquid crystal capacitor CLCt and CLCr equals to be applied to the common electric voltage VSTG of the first and second holding capacitor CSTt and CSTr substantially.

Just, during the part-time section when the first on-off element TFTt as transmission part Pt is driven, the first common electric voltage VSTGt is applied to the first holding capacitor CSTt.The first common electric voltage VSTGt that is applied to the first holding capacitor CSTt equals to be applied to the first common electric voltage VCOMt of the first liquid crystal capacitor CLCt substantially.During the part-time section when the second switch elements T FTr as reflecting part Pr is driven, the second common electric voltage VSTGr is applied to the second holding capacitor CSTr.The second common electric voltage VSTGr that is applied to the second holding capacitor CSTr equals to be applied to the second common electric voltage VCOMr of the second liquid crystal capacitor CLCr substantially.

Driver module 600 comprises main driver module 610 and grid circuit unit 630.

Main driver module 610 can comprise the chip among the external zones PA, so that based on control signal and the data-signal from FPC 700 drive signal is applied to pixel component P.Main driver module 610 can be positioned on the infrabasal plate 510.

Grid circuit unit 630 can be integrated into external zones PA.Perhaps, grid circuit unit 630 can comprise the chip among the external zones PA.Grid circuit unit 630 based on the drive signal of coming autonomous driver element 610 with signal G1t, G1r, G2t, G2r ... Gnt and Gnr be applied to gate lines G L1, GL2 ..., GL2n.For example, during a horizontal cycle 1H, can with signal G1t, G1r, G2t, G2r ... the first and second signal G1t and the G1r of Gnt and Gnr are applied to pixel component P.For example, the 1H cycle can be 1 frame.Perhaps, the 1H cycle can be the effective display cycle as a part of frame.

Figure 13 is the block scheme of the exemplary main driver element shown in graphic extension Figure 12.

With reference to Figure 12 and 13, main driver element 610 comprises control assembly 611, storer 613, voltage generating unit 615 and source drive unit 670.

Control assembly 611 receives from the outside to the control assembly 611 data-signal 610a and control signal 610b.Control signal 610b comprises horizontal-drive signal, vertical synchronizing signal, master clock signal and data enable signal.

Control assembly 611 is read and write the data-signal 610a on the storer 613 based on control signal 610b.Control assembly 611 is applied to grid circuit unit 630 with grid control signal 611a.Grid control signal 611a comprises vertical start signal STV, the first clock signal C K, second clock signal CKB and grid voltage VSS.

Control assembly 611 is applied to source drive unit 670 with source control signal 611b, and will be applied to source drive unit 670 from the data-signal 611d that storer 613 reads.Source control signal 611b comprises vertical start signal, load signal and reverse signal.

Control assembly 611 will comprise that the control signal 611c of master clock signal, reverse signal etc. is applied to voltage and generates parts 615.

Voltage generates parts 615 and generates driving voltage based on the power supply 610c that the outside provides.Driving voltage comprises grid voltage (VSS, VDD) 615a, reference gray level voltage (VREF) 615b, be applied to the common electric voltage VCOMt and the VCOMr of public electrode of upper substrate 620 and common electric voltage (VSTGt, the VSTGr) 615c that is applied to the public electrode (such as the storage public electrode) of the holding capacitor of infrabasal plate 610.Voltage generates parts 615 grid voltage (VSS, VDD) 615a and reference gray level voltage (VREF) 615b is applied to control assembly 611 and source drive unit 670 respectively.

Voltage generates parts 615 also are applied to the first common electric voltage VCOMt the first liquid crystal capacitor CLCt during the first of 1H first public electrode, so that activate first grid polar curve GLt, and during the second portion in 1H cycle, the second common electric voltage VCOMr is applied to second public electrode of the second liquid crystal capacitor CLCt, so that activate second grid line GLr.

Voltage generating portion 615 by with apply first and second public electrodes (for example, the first and second storage public electrodes) that the first and second common electric voltage VCOMt and the essentially identical method of VCOMr are applied to the first and second common electric voltage VSTGt and VSTGr the first and second holding capacitor CSTt and CSTr respectively.

The second common electric voltage VCOMr is the predetermined value of being determined by experiment, is used to compensate the off-set value between the data voltage of the data voltage of transmission mode and reflective-mode.For example, the specific inductive capacity of the liquid crystal layer corresponding with the data voltage of transmission mode can compare with the specific inductive capacity with the corresponding liquid crystal layer of the data voltage of reflective-mode, so that determine the second common electric voltage VCOMr.

Based on reference gray level voltage VREF 615b, source drive unit 670 will be converted to from the data-signal 611d that storer 613 reads analog data voltage D1, D2 ... Dm, so as with analog data voltage D1, D2 ... Dm be applied to source electrode line DL1, DL2 ... DLm.

Figure 14 is the sequential chart that graphic extension is used to drive the illustrative methods of the exemplary L CD equipment shown in Figure 12.

Referring to figs. 12 to 14, source drive unit 670 during the 1H cycle, will be converted to from the data-signal 611d of control assembly 611 source electrode line DL1, DL2 ... the analog data voltage DATA_0 of DLm.From the data-signal 611d of control assembly 611 horizontal line corresponding to LCD equipment.For example, source drive unit 670 comes inverted data signal 611d by the circuit inverting method during the 1H cycle, and with data-signal 611d be applied to source electrode line DL1, DL2 ... DLm.

Particularly, source drive unit 670 generates the first horizontal data voltage 1L_0.Source electrode drove unit, road 670 and generate the first horizontal first grid signal G1t during the initial H/2 cycle in 1H cycle.In addition, voltage generates parts 615 are applied to the first common electric voltage VCOMt upper substrate 620 during the initial H/2 cycle in 1H cycle public electrode.Voltage generates parts 615 also will have the storage public electrode that is applied to infrabasal plate with the 3rd common electric voltage VSTGt of the basic identical level of the first common electric voltage VCOMt.Shown in exemplary embodiment in, source drive unit 670 is divided into red data voltage group, green data voltage group and blue data voltage group by 3 * 1MUX method with data voltage 1L_0.

The first on-off element TFTt of transmitting member Pt is based on first grid signal G1t and conducting, so that will be applied to the transparency electrode TE of the first liquid crystal capacitor CLCt from the data voltage of source electrode line DL.Transparency electrode TE is first electrode of the first liquid crystal capacitor CLCt.The first common electric voltage VCOMt is applied to the public electrode of upper substrate 620.Public electrode is second electrode of the first liquid crystal capacitor CLCt.

The first pixel voltage VPt corresponding with the voltage difference between the data voltage VD and the first common electric voltage VCOMt is stored among the first liquid crystal capacitor CLCt.The first pixel voltage VPt can be the pixel voltage VDP that is stored among the first liquid crystal capacitor CLCt.

Source drive unit 670 is exported the first horizontal data voltage 1L_0 then.Grid circuit unit 630 generates the first horizontal second grid signal G1r during the back H/2 cycle in 1H cycle.In addition, voltage generates the public electrode that parts 615 are applied to the second common electric voltage VCOMr upper substrate.Voltage generates the storage public electrode that parts 615 are applied to the 4th common electric voltage VSTGr infrabasal plate.The 4th common electric voltage VSTGr has the essentially identical level with the second common electric voltage VCOMr.

Therefore, the second switch elements T FTr of reflecting part Pr is based on second grid signal G1r and conducting, so that will be applied to the arc chamber capacitor Cc that is electrically connected in series with the second liquid crystal capacitor CLCr from the data voltage of source electrode line DL.A part of VD1 of data voltage is stored among the arc chamber capacitor Cc, and the remainder VD2 of data voltage is stored among the second liquid crystal capacitor CLCr.The second common electric voltage VCOMr is applied to the public electrode of upper substrate 620, and the public electrode of this upper substrate 620 is second electrodes of the second liquid crystal capacitor CLCr.

The second pixel voltage VPr corresponding with the voltage difference between the remainder VD2 of the second common electric voltage VCOMr and data voltage is stored among the second liquid crystal capacitor CLCr of reflecting part Pr.The second pixel voltage VPr can be the pixel voltage VDP that is stored among the second liquid crystal capacitor CLCr.Just, the data voltage with level corresponding with the first pixel voltage VPt is by arc chamber capacitor Cc dividing potential drop, thereby the second pixel voltage VPr that has less than the level of the first pixel voltage VPt is stored among the second liquid crystal capacitor CLCr.

In addition, the operating period that is adjusted in transmission part Pt is applied to the first common electric voltage VCOMt of the first liquid crystal capacitor CLCt and is applied to voltage difference delta V between the second common electric voltage VCOMr of the second liquid crystal capacitor CLCr in the operating period of reflecting part Pr, so that the V-T that compensation is regulated and the off-set value of V-R curve.V-T and V-R curve are regulated by arc chamber capacitor Cc.

Therefore, arc chamber capacitor Cc and common electric voltage VCOM are conditioned, thereby the V-T curve is basic identical with the V-R curve.

With reference to Figure 12 and 15, regulate the electric capacity of the arc chamber capacitor Cc that the second liquid crystal capacitor CLCr with reflecting part Pr is connected in series, thereby the white appliances of V-R curve press VRw and difference between the black voltage VRb to equal poor between the white appliances pressure VTw of V-T curve and the black voltage VTb substantially.

In addition, the first common electric voltage VCOMt that is applied to the first liquid crystal capacitor CLCt of transmission part Pt is conditioned with the second common electric voltage VCOMr that is applied to the second liquid crystal capacitor CLCr of reflecting part Pr, with the V-T that regulated of compensation and the off-set value of V-R, it has essentially identical white and black voltage.

In Figure 12 and 15, in the exemplary embodiment, the specific inductive capacity of liquid crystal layer that will be corresponding with the data voltage of transmission mode and compare with the specific inductive capacity of the corresponding liquid crystal layer of the data voltage of reflective-mode is so that determine the second common electric voltage VCOMr.

According to the present invention, be applied to voltage difference between second common electric voltage of first common electric voltage and second liquid crystal capacitor that is applied to the reflecting part of first liquid crystal capacitor of transmission part and be changed poor between the crest voltage of the crest voltage of V-T curve and V-R curve, thus the raising image displaying quality.

In addition, regulate the electric capacity of the arc chamber capacitor that second liquid crystal capacitor with the reflecting part is electrically connected in series, thus the white appliances of transmission mode are pressed and black voltage between the difference white appliances that equal reflective-mode substantially press and black voltage between poor.And the level that is applied to the common electric voltage of liquid crystal capacitor is changed, so that the V-T curve that compensation is regulated by the arc chamber capacitor and the off-set value of V-R curve.Therefore, the V-T curve has and the essentially identical shape of V-R curve, so that improve the image displaying quality of half reflection LCD equipment.

Reference example embodiment has described the present invention.But, be apparent that in view of foregoing description, many replaceability modifications and variations are tangible for the person of ordinary skill of the art.Therefore, the modifications and variations of all that replaceability within the spirit and scope that fall into claims are contained in the present invention.

Claims

1. liquid crystal display comprises:

LCD panel comprises a plurality of pixel components, and each pixel component comprises:

The transmission part, it has first on-off element that is electrically connected to first grid polar curve and first liquid crystal capacitor that is electrically connected to first on-off element; With

The reflecting part, second liquid crystal capacitor that it has the second switch element that is electrically connected to the second grid line and is electrically connected to the second switch element; With

Driver module is used in the conduction period of first on-off element first common electric voltage being applied to first liquid crystal capacitor, and in the conduction period of second switch element second common electric voltage is applied to second liquid crystal capacitor.

2. liquid crystal display as claimed in claim 1, wherein, first and second liquid crystal capacitors comprise liquid crystal layer, and the voltage difference between first and second common electric voltages equals the voltage difference between the crest voltage of voltage-light reflectivity curve of the crest voltage of voltage-light transmission curve of liquid crystal layer and liquid crystal layer substantially.

3. liquid crystal display as claimed in claim 2, wherein, liquid crystal layer comprises the perpendicular alignmnet pattern.

4. liquid crystal display as claimed in claim 1, wherein, first on-off element comprises:

Be electrically connected to the first grid of first grid polar curve;

Be electrically connected to first source electrode of source electrode line; With

Be electrically connected to first drain electrode of transparency electrode, this transparency electrode is first electrode of first liquid crystal capacitor.

5. liquid crystal display as claimed in claim 4, wherein, the second switch element comprises:

Be electrically connected to the second grid of the second grid line adjacent with first grid polar curve;

Be electrically connected to second source electrode of source electrode line; With

Be electrically connected to second drain electrode of reflecting electrode, this reflecting electrode is first electrode of second liquid crystal capacitor.

6. liquid crystal display as claimed in claim 5, wherein, first public electrode of first liquid crystal capacitor is electrically connected to second public electrode of second liquid crystal capacitor.

7. liquid crystal display as claimed in claim 5, wherein, driver module comprises:

The source drive unit is used for data voltage is applied to source electrode line;

Drive element of the grid is used to export the first grid signal and the second grid signal that activate first and second gate lines respectively; With

Voltage generating unit is used between the active period of first grid polar curve first common electric voltage being applied to first liquid crystal capacitor, and between the active period of the deactivation of first grid polar curve and second grid line second common electric voltage is applied to second liquid crystal capacitor.

8. liquid crystal display as claimed in claim 7, wherein, first grid polar curve was activated during the initial H/2 cycle in 1H cycle, and the second grid line was activated during the back H/2 cycle in 1H cycle.

9. liquid crystal display as claimed in claim 7, wherein, first grid polar curve was activated during the initial H/2 cycle in 1H cycle, and the second grid line was activated during the whole cycle in 1H cycle.

10. liquid crystal display as claimed in claim 1 also comprises liquid crystal layer, wherein, and by the specific inductive capacity of the liquid crystal layer in the transmission mode and the specific inductive capacity of the liquid crystal layer in the reflective-mode are compared to determine second common electric voltage.

11. liquid crystal display as claimed in claim 1, wherein, the absolute value of first common electric voltage is greater than the absolute value of second common electric voltage.

12. driver module that is used to drive liquid crystal display, described liquid crystal display comprises a plurality of pixel components, each pixel component comprises the transmission part that has first on-off element that is electrically connected to first grid polar curve and be electrically connected to first liquid crystal capacitor of first on-off element, and have second switch element that is electrically connected to the second grid line and the reflecting part that is electrically connected to second liquid crystal capacitor of second switch element, described driver module comprises:

Voltage generating unit is used between the active period of first grid polar curve first common electric voltage being applied to first liquid crystal capacitor, and during the deactivation of first grid polar curve second common electric voltage is applied to second liquid crystal capacitor.

13. driver module as claimed in claim 12, wherein, first and second liquid crystal capacitors comprise liquid crystal layer, and the voltage difference between first and second common electric voltages equals the voltage difference between the crest voltage of voltage-light reflectivity curve of the crest voltage of voltage-light transmission curve of liquid crystal layer and liquid crystal layer substantially.

14. method that is used to drive liquid crystal display, described liquid crystal display comprises pixel component, pixel component comprises the transmission part that has first on-off element and be electrically connected to first liquid crystal capacitor of first on-off element, and have second switch element and the reflecting part that is electrically connected to second liquid crystal capacitor of second switch element, described method comprises:

Conducting first on-off element, so as with first liquid crystal capacitor that charges from the first corresponding pixel voltage of the data voltage of first on-off element and the voltage difference between first public its voltage; With

By first on-off element and conducting second switch element, so as with second liquid crystal capacitor that charges from the second corresponding pixel voltage of the data voltage of second switch element and the voltage difference between second common electric voltage.

15. method as claimed in claim 14, wherein, first and second liquid crystal capacitors comprise liquid crystal layer, and the voltage difference between first and second common electric voltages equals the voltage difference between the crest voltage of voltage-light reflectivity curve of the crest voltage of voltage-light transmission curve of liquid crystal layer and liquid crystal layer substantially.

16. method as claimed in claim 14, wherein, first pixel voltage charges through the following steps:

Activate the first grid polar curve be connected with first on-off element, so as will with the transparency electrode that is applied to first liquid crystal capacitor from the corresponding voltage of the data voltage of first on-off element; With

First common electric voltage is applied to first public electrode of first liquid crystal capacitor.

17. method as claimed in claim 16, wherein, second pixel voltage charges through the following steps:

Deactivation first grid polar curve;

Activate the second grid line be connected with the second switch element, so as will with the reflecting electrode that is applied to second liquid crystal capacitor from the corresponding voltage of the data voltage of second switch element; With

Second common electric voltage is applied to second public electrode of second liquid crystal capacitor.

18. method as claimed in claim 14, wherein, the first grid polar curve that is connected with first on-off element was activated during the initial H/2 cycle in 1H cycle.

19. method as claimed in claim 14, wherein, the second grid line that is connected with the second switch element was activated during the back H/2 cycle in 1H cycle.

20. method as claimed in claim 14, wherein, the second grid line that is connected with the second switch element was activated during the whole 1H cycle.

21. method as claimed in claim 14, wherein, when the second switch element was switched on, first on-off element was cut off.

22. method as claimed in claim 14, wherein, the basic conducting simultaneously of first on-off element and second switch element, and first on-off element was ending before the second switch element.

23. method as claimed in claim 14, wherein, first and second liquid crystal capacitors comprise liquid crystal layer, and described method also comprises by the specific inductive capacity of the liquid crystal layer in the transmission mode and the specific inductive capacity of the liquid crystal layer in the reflective-mode are compared to determine second common electric voltage.

24. a liquid crystal display comprises:

The LCD panel that comprises a plurality of pixel components, each pixel component comprises:

The reflecting part, its have the second switch element that is electrically connected to the second grid line, be electrically connected to second liquid crystal capacitor of second switch element and be connected electrically in the second switch element and second liquid crystal capacitor between the arc chamber capacitor; With

25. liquid crystal display as claimed in claim 24, wherein, transmission and reflecting part further comprise first holding capacitor and second holding capacitor respectively, and

Driver module is applied to first holding capacitor in the conduction period of first on-off element with first common electric voltage, and in the conduction period of second switch element second common electric voltage is applied to second holding capacitor.

26. liquid crystal display as claimed in claim 25, wherein, driver module is applied to second holding capacitor with second common electric voltage between the off period of first on-off element.

27. liquid crystal display as claimed in claim 24, wherein, first on-off element comprises:

Be electrically connected to the first grid of first grid polar curve,

28. liquid crystal display as claimed in claim 24, wherein, the second switch element comprises the second grid that is electrically connected to the second grid line adjacent with first grid polar curve, be electrically connected to second source electrode of source electrode line and be electrically connected to second drain electrode of first electrode of arc chamber capacitor, and

Second electrode of arc chamber capacitor is electrically connected to reflecting electrode, and this reflecting electrode is first electrode of second liquid crystal capacitor.

29. liquid crystal display as claimed in claim 28, wherein, first public electrode of first liquid crystal capacitor is electrically connected to second public electrode of second liquid crystal capacitor.

30. liquid crystal display as claimed in claim 28, wherein, driver module comprises:

31. liquid crystal display as claimed in claim 30, wherein, first grid polar curve was activated during the initial H/2 cycle in 1H cycle, and the second grid line was activated during the back H/2 cycle in 1H cycle.

32. liquid crystal display as claimed in claim 30, wherein, first grid polar curve was activated during the initial H/2 cycle in 1H cycle, and the second grid line was activated during the whole cycle in 1H cycle.

33. method that is used to drive liquid crystal display, described liquid crystal display comprises pixel component, pixel component comprises transmission part and reflecting part, described transmission partly has first on-off element and is electrically connected to first liquid crystal capacitor of first on-off element, second liquid crystal capacitor that described reflecting part has the second switch element, is electrically connected to the arc chamber capacitor of second switch element and is electrically connected to the arc chamber capacitor, described method comprises:

Conducting first on-off element, so as with first liquid crystal capacitor that charges from the first corresponding pixel voltage of the data voltage of first on-off element and the voltage difference between first common electric voltage; With

34. method as claimed in claim 33, wherein, first pixel voltage charges through the following steps:

First common electric voltage is applied to first public electrode of first liquid crystal capacitor; With

Activate the first grid polar curve that is connected with first on-off element, so that will be applied to the transparency electrode of first liquid crystal capacitor from the data voltage of first on-off element.

35. method as claimed in claim 34, wherein, second pixel voltage charges through the following steps:

Deactivation first grid polar curve;

Second common electric voltage is applied to second electrode of arc chamber capacitor and second public electrode of second liquid crystal capacitor;

Activate the second grid line that is connected with the second switch element, so that will partly be applied to first electrode of arc chamber capacitor from the data voltage of second switch element; With

To be applied to the reflecting electrode of second liquid crystal capacitor from the remainder of the data voltage of second switch element.

36. method as claimed in claim 33, wherein, the first grid polar curve that is connected with first on-off element was activated during the initial H/2 cycle in 1H cycle.

37. method as claimed in claim 33, wherein, the second grid line that is connected with the second switch element was activated during the back H/2 cycle in 1H cycle.

38. method as claimed in claim 33, wherein, the second grid line that is connected with the second switch element was activated during the 1H cycle.