CN1316065A - Liquid crystal display, method for driving same and method for manufacturing same - Google Patents

Liquid crystal display, method for driving same and method for manufacturing same Download PDF

Info

Publication number
CN1316065A
CN1316065A CN00801254A CN00801254A CN1316065A CN 1316065 A CN1316065 A CN 1316065A CN 00801254 A CN00801254 A CN 00801254A CN 00801254 A CN00801254 A CN 00801254A CN 1316065 A CN1316065 A CN 1316065A
Authority
CN
China
Prior art keywords
mentioned
source electrode
liquid crystal
electric field
lead
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN00801254A
Other languages
Chinese (zh)
Inventor
熊川克彦
山北裕文
井上一生
木村雅典
盐田昭教
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Publication of CN1316065A publication Critical patent/CN1316065A/en
Pending legal-status Critical Current

Links

Images

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1343—Electrodes
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1343—Electrodes
    • G02F1/134309—Electrodes characterised by their geometrical arrangement
    • G02F1/134363—Electrodes characterised by their geometrical arrangement for applying an electric field parallel to the substrate, i.e. in-plane switching [IPS]
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1337—Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers
    • G02F1/133707—Structures for producing distorted electric fields, e.g. bumps, protrusions, recesses, slits in pixel electrodes
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F2201/00—Constructional arrangements not provided for in groups G02F1/00 - G02F7/00
    • G02F2201/12—Constructional arrangements not provided for in groups G02F1/00 - G02F7/00 electrode
    • G02F2201/121—Constructional arrangements not provided for in groups G02F1/00 - G02F7/00 electrode common or background

Abstract

An electric field controlling electrode overlaying an edge of a source line is provided on a counter substrate to generate a vertical electric field in a gap region between the source line and a common electrode. Thereby, liquid crystal molecules are raised and the gap region is turned to be a black state, which eliminates a light leakage problem and thereby improves a contrast. The use of electric field for preventing the light leakage allows the device to have an increased margin for misalignment of a light blocking region. It is therefore made unnecessary to extend the light blocking region to a pixel region. An aperture ratio is thereby increased.

Description

Liquid crystal indicator, its driving method and manufacture method thereof
Technical field
The present invention relates to liquid crystal indicator, particularly have liquid crystal indicator than the transverse electric field pattern of wide viewing angle characteristics.
Background technology
(the 1st background technology)
Liquid crystal indicator is widely used for the display device of various electronic equipments as the energy-conservation display of thin light.Wherein in-plane-switching mode (IPS pattern) shows by the electric field parallel with substrate, and present people's display characteristic wide according to the visual angle developed at the application of LCD monitor etc.
The liquid crystal indicator of this IPS pattern is a form as follows.Figure 26 is the planimetric map of the structure of the pixel parts of the liquid crystal indicator shown in the expression Japanese kokai publication hei 7-36058 document, and Figure 27 represents its section in a schematic way.
In Figure 26 and Figure 27, label 111 expression array base paltes, label 112 expression counter substrate.Label 101 expression pixel capacitors, label 102 expression public electrodes make liquid crystal 117 actions by the electric field that produces between pixel capacitors 101 and public electrode 102.Provide common potential by outside terminal to public electrode 102.
Label 103 expression amorphous silicon films, label 104 grid leads, label 105 expression source electrode leads are formed by amorphous silicon film 103 and near the electrode it as the thin film transistor (TFT) of on-off element.If provide the selection signal to sweep trace 104, then amorphous silicon film 103 is in conducting state, produces from the charging towards pixel capacitors 101 of the component of source electrode lead 105, and pixel voltage is provided.
The dielectric film of label 118 expression in order to form with each electrode separation and at interlayer, label 119 is for being used for the dielectric film of protective film transistor or electrode.Label 115 and 116 is represented oriented films, makes liquid crystal 117 orientations of substrate interface.Label 113 and 114 expressions are used to carry out the polaroid that polarized light shows.
According to such formation, owing to can apply parallel electric field to substrate, and drive liquid crystal, so when showing, the not relative real estate of liquid crystal molecule erects, and can carry out the wide demonstration in visual angle.
In Japanese kokai publication hei 9-269504 document, following proposal is disclosed at the IPS pattern, wherein form the black matrix of counter substrate by conductive material, make itself and public electrode realize short circuit.Figure 28 represents this scheme, will be formed at black matrix 151 around the color filter 152 as conductive material, by the conductive material 153 of conductive paste etc., be short-circuited with public electrode 154 on the substrate that is positioned at a relative side.Thus, obtained by using longitudinal electric field to improve the effect of brightness.In addition, above-mentioned document description also have the effect that prevents remaining image, and the shielding external electrical field, suppress the effect that display quality reduces.
But,, stay following problem in the occasion of above-mentioned liquid crystal indicator.
(1) owing to the current potential of the source electrode lead video data corresponding to another part changes, so being positioned between the outermost pixel capacitors (or public electrode) of source electrode lead and pixel, produce unwanted electric field, owing to light leak from this clearance portion, so contrast reduces, or show chaotic.
(2) carrying out milled processed so that make the occasion of liquid crystal aligning and since the source electrode lead be positioned at gap between the outermost pixel capacitors (or public electrode) of pixel less than pixel parts, so liquid crystal is directed insufficient, the contrast reduction.
(3) for the hidden clearance portion that throws into question in aspect above-mentioned (1) and (2) and the occasion of light blocking layer (black matrix) is set on counter substrate, during with array base palte and counter substrate applying, owing to must consider to produce the situation of the dislocation between this light blocking layer and source electrode lead or the pixel capacitors (or public electrode), so must be according to its edge amount, increase the part that is in the light, aperture opening ratio is reduced.
(the 2nd background technology)
The active matrix-type liquid crystal display device that adopts thin film transistor (TFT) (TFT:Thin-Film-Transister) is because of reduced thickness, lightweight, but the advantage of low voltage drive etc., (the various fields of display of the display of the usefulness of カ system コ-ゲ), personal computer, individual word processor etc. form bigger market and be applied to the cam scrambler.
Particularly in recent years, in computing machine or TV purposes, corresponding to the situation that realizes big picture, requirement to LCD panel with wideer visual angle increases, corresponding, in documents such as Japanese kokai publication hei 6-160878, proposed to enlarge the mode at the visual angle of LCD panel, this mode refer to by on same substrate, form pixel capacitors and opposite electrode, apply transverse electric field, make the liquid crystal molecule action in the transverse electric field mode.This mode also is called IPS (In-Plane-Switching) pattern or comb-type electrode mode, in this display mode, not because of the major axis of liquid crystal molecule in situation about erecting with the basic keeping parallelism of substrate, liquid crystal molecule at ordinary times, the brightness when therefore acquiring change view directions changes less broad visual angle.
But, the LCD panel of Gou Chenging has following problems in the manner described above, promptly the unwanted electric field that produces from the source electrode lead can have influence on liquid crystal is controlled and the electric field region that shows, makes electric field change, causes that brightness tilts or be called the bad demonstration of crosstalking.
For this problem, in Japanese kokai publication hei 11-52420 document, following liquid crystal indicator has been proposed, in this device, by on the opposite face of source electrode lead, forming the electric conductivity film that is in the light, inhibition is to the influence of electric field to showing that source wires produces, eliminate LCD panel about luminance difference or crosstalk.
Below by accompanying drawing, existing liquid crystal indicator is described.
Figure 29 is the structure of 1 pixel in the existing liquid crystal indicator of expression, and Figure 30 is the cut-open view along the A-A ' line among Figure 29, and this figure represents the situation of the electric field of source electrode lead and near the display part it in a schematic way.In Figure 29 and Figure 30, the grid lead from the sweep signal of gate driver circuit is supplied with in label 51 expressions, and label 52a, 52b represent to supply with the source electrode lead from the picture intelligence of source electrode drive circuit.In addition, for convenience of description, label 52a represents to be positioned at the source electrode lead on Figure 29 right side, and label 52a represents to be positioned at the source electrode lead in the left side of Figure 29, when being generically and collectively referred to as the source electrode lead, by label 52 expressions.Near the cross part of above-mentioned grid lead 51 and above-mentioned source electrode lead 52,, form the thin film transistor (TFT) (TFT:Thin-Film-Transister) 55 that forms by semiconductor layer as on-off element.If by the sweep signal of supplying with by above-mentioned source electrode lead 51, make above-mentioned TFT55 by conducting selectively, then, supply with pixel capacitors 53 by TFT55 by the picture intelligence that above-mentioned source electrode lead 52a supplies with in TFT55 conduction period.Between the current potential of the current potential of supplying with this pixel capacitors 53 and the public electrode 54 that forms reference potential, produce electric field P2, the action of the liquid crystal between the electrode 53,54 57 is controlled, realize the gray scale demonstration.
At this moment, as shown in figure 30, the electric field of display part M is changed in order to prevent the electric field that source electrode lead 52b produces, with counter substrate 61 on the equitant position of source electrode lead form the film that the is in the light (BM: black matrix) 58 of electric conductivity.
According to said structure, by the electric conductivity film 58 that is in the light, between itself and source electrode lead, produce the electric field P1 of vertical direction, can suppress the generation of the unwanted electric field of horizontal direction, can suppress influence to showing.In addition, because potential change with source electrode lead 52a, the be in the light current potential of film 58 of the electric conductivity that is positioned at the top changes, so the source electrode lead 52 of adjacency is applied the signal of opposite polarity, the be in the light potential change of film 58 of electric conductivity is eliminated, make the be in the light current potential of film 58 of electric conductivity keep stable, thereby obtain above-mentioned effect.
But, in above-mentioned existing liquid crystal indicator, in order to make the be in the light current potential of film of electric conductivity keep stable, the source electrode lead of adjacency is applied the signal of opposite polarity, yet the signal voltage that imposes on the source electrode lead can change because of the image that shows at ordinary times, even under the situation that alternating polarity is changed, because signal voltage value is difference with each source electrode lead, can eliminate the be in the light situation of potential change of film of electric conductivity fully so be limited to.Such as, situation in occasion of the nicking apperance that shows every row along source electrode lead direction etc., even under the situation of the reversal of poles that makes signal voltage at every root polar conductor, because in the occasion that just shows and bear demonstration, the signal voltage value that imposes on the source electrode lead produces more different, follow this situation, the electric conductivity film that is in the light is subjected to the influence of potential change along a direction, can not eliminate potential change.Thus, can not form terminal by the electric conductivity film that is in the light from the electric field of source electrode lead.
In addition, if wait simulation and the experiment of carrying out according to the inventor, even forming the electric conductivity film that is in the light as just the BM of filter substrate, at every root polar conductor, according to identical amplitude, apply under the situation of signal voltage of reversal of poles, often discovery can not suppress the situation of crosstalking fully.That is, can not be by the electrode width of change as the parameter of the structural detail of liquid crystal cell, electrode separation, the thickness between the substrate, the amplitude of source signal, the unwanted electric field that suppresses the generation of source electrode lead leak to produce crosstalks.Figure 31 represents this result's a example.In Figure 31, the respective width of public electrode 54, pixel capacitors 53, source electrode lead 52b is 6 μ m, the be in the light width of film BM58 of electric conductivity is 16 μ m, electrode separation between public electrode 54 and the pixel capacitors 53 is 12 μ m, distance between the substrate is 3.9 μ m, and the peak swing value of source signal is 14v.In addition, Figure 31 represents the essentially identical position with Figure 30, represents the Electric Field Distribution of the section of pixel by equipotential line, by the distribute action of liquid crystal of this electric field of expression of transmitance.In Figure 31, the electric field that source electrode lead 52b produces makes the electric field change of display part, makes the action confusion of liquid crystal, makes the seeing through of source electrode lead side of display part separate cloth a greater than the original transmitance distribution b that does not have the source electrode lead that electric field is impacted.The variation that this transmitance distributes is the reason of crosstalking of liquid crystal indicator.
The object of the present invention is to provide a kind of liquid crystal indicator, its driving method and its manufacture method, this liquid crystal indicator is not provided with black matrix, prevents near the light leak that produces of liquid crystal indicator or grid lead, can improve contrast.
In addition, the object of the present invention is to provide a kind of liquid crystal indicator, distance between source electrode conductor width, public electrode width, substrate, spacing between public electrode and the pixel capacitors, under the situation that (parameters of the structural detail of liquid crystal display cells) such as signal voltage amplitudes set in any case, that can suppress still that the source electrode lead produces does not need electric field, makes the generation of not crosstalking.
To achieve these goals, the 1st group of invention and the 2nd group of invention have just been formed.
At first, the structure to the 1st group of invention is described.The described invention of claim 1 in the 1st group of invention relates to liquid crystal indicator, wherein at the clamping liquid crystal layer and the opposite face side of a substrate in two relative substrates forms each point of crossing of the source electrode lead be rectangular setting and grid lead, corresponding above-mentioned source electrode lead and grid lead and the on-off element that is provided with, the pixel capacitors that is connected with this on-off element and relative pixel capacitors with this are relative and the public electrode that forms along above-mentioned source electrode lead;
It is characterized in that, on another piece substrate in above-mentioned a pair of substrate control electrode of electric field is set, this control electrode of electric field is provided with according to the mode of the edge part that covers above-mentioned source electrode lead.
By above-mentioned structure, be vertically owing to can make near the electric field the source electrode lead, make liquid crystal molecule be in the state that relative basic side erects, thus can make the space part of source electrode lead periphery be in black state, the demonstration that degree of comparing is high.
The described invention of claim 2 relates to the described liquid crystal indicator of claim 1, it is characterized in that, above-mentioned control electrode of electric field is formed by transparency material.
By above-mentioned structure, can improve actual aperture opening ratio.
The described invention of claim 3 relates to the described liquid crystal indicator of claim 2, it is characterized in that, with the edge spacing far away of the pixel capacitors of the both sides adjacency of corresponding source electrode lead or public electrode by L1 represent, nearer edge spacing is by the occasion that L2 represents, the width of above-mentioned pixel capacitors or public electrode is represented by Wcom, then the width W of above-mentioned control electrode of electric field is satisfying following relational expression
In the scope of L2-Wcom≤W≤L1.
As mentioned above, the width W of restriction control electrode of electric field is following reason.That is,, produce vertical electrode, liquid crystal is not applied sufficient horizontal component of electric field at pixel area if the width W of control electrode of electric field is wide.If the width W of control electrode of electric field is narrow, the zone that obtains vertical electric field diminishes, and the electric field controls effect is insufficient.
The described invention of claim 4 relates to the described liquid crystal indicator of claim 1, it is characterized in that, above-mentioned control electrode of electric field is formed by nontransparent material.
By above-mentioned structure, control electrode of electric field as black matrix, can improve the effect that is in the light simultaneously.
The described invention of claim 5 relates to the described liquid crystal indicator of claim 4, it is characterized in that, with the edge spacing far away of the pixel capacitors of the both sides adjacency of corresponding source electrode lead or public electrode by L1 represent, nearer edge spacing is by the occasion that L2 represents, the width of above-mentioned pixel capacitors or public electrode is represented by Wcom, then the width W of above-mentioned control electrode of electric field is satisfying following relational expression
In the scope of L2-Wcom≤W≤L1+Wcom.
The occasion that forms by nontransparent material, such as the metal level of chromium etc. at control electrode of electric field is that the occasion of transparency electrode is compared with control electrode of electric field, preferably reduces the control electrode of electric field width W.Its reason is that control electrode of electric field exceeds the viewing area if because the dislocation the during applying of a pair of substrate, and then its aperture opening ratio reduces.
The described invention of claim 6 relates to liquid crystal indicator, wherein at the clamping liquid crystal layer and the opposite face side of a substrate in two relative substrates forms source electrode lead and the grid lead be rectangular setting, each point of crossing of corresponding above-mentioned source electrode lead and grid lead and the on-off element that is provided with, the pixel capacitors that is connected with this on-off element, and relative pixel capacitors with this relatively and the public electrode that forms along above-mentioned source electrode lead, it is characterized in that, on another piece substrate in above-mentioned a pair of substrate control electrode of electric field is set, this control electrode of electric field is provided with according to the mode of the edge part that covers above-mentioned grid lead.
As mentioned above, owing to control electrode of electric field is set by mode according to the edge part of cover gate lead, can make near the electric field of grid lead longitudinally, make liquid crystal molecule be in the state that relative real estate erects, so make the space part of grid lead periphery be in black state, can the high demonstration of degree of comparing.
The described invention of claim 7 relates to the described liquid crystal indicator of claim 6, it is characterized in that, above-mentioned control electrode of electric field also covers near the portion of above-mentioned source electrode lead.
By such structure, make the space part of grid lead and source electrode lead periphery be in black state, can the high demonstration of degree of comparing.
The described invention of claim 8 relates to the described liquid crystal indicator of claim 1, it is characterized in that, the induced anisotropy of above-mentioned liquid crystal layer is positive.
The described invention of claim 9 relates to the driving method of liquid crystal indicator, wherein the opposite face side of a substrate in two relative substrates of clamping liquid crystal layer forms source electrode lead and the grid lead that is rectangular setting, each point of crossing of corresponding above-mentioned source electrode lead and grid lead and the on-off element that is provided with, the pixel capacitors that is connected with this on-off element, and relative pixel capacitors with this relatively and the public electrode that forms along above-mentioned source electrode lead, on another piece substrate in above-mentioned a pair of substrate, the control electrode of electric field that coincides with the source electrode lead is set basically, it is characterized in that, the opposite polarity voltage with the voltage that puts on above-mentioned source electrode lead is put on the above-mentioned control electrode of electric field.
By above-mentioned structure, owing to can strengthen near the longitudinal electric field of source electrode lead, make liquid crystal molecule be in the state that relative real estate further erects, thus can make the space part of above-mentioned source electrode lead periphery form black display, can the high demonstration of degree of comparing.
The described invention of claim 10 relates to liquid crystal indicator, wherein at the clamping liquid crystal layer and the opposite face side of a substrate in two relative substrates forms source electrode lead and the grid lead be rectangular setting, each point of crossing of corresponding above-mentioned source electrode lead and grid lead and the on-off element that is provided with, the pixel capacitors that is connected with this on-off element, and relative pixel capacitors with this relatively and the public electrode that forms along above-mentioned source electrode lead, it is characterized in that, above-mentioned liquid crystal layer forms the vertical orientation zone, this zone liquid crystal in advance above-mentioned source electrode lead and and the pixel capacitors of its both sides adjacency or the spacer portion between the public electrode or above-mentioned source electrode lead and and pixel capacitors or at least 1 spacer portion in the spacer portion between the public electrode of its both sides adjacency vertically directed.
As mentioned above, since source electrode lead (or grid lead) and and the pixel capacitors (or public electrode) of its both sides adjacency between spacer portion at least one in form the vertically directed in advance vertical orientation zone of liquid crystal, so produce the effect identical with the occasion that control electrode of electric field is set, can make the space part of grid lead periphery form black display, can the high demonstration of degree of comparing.
The described invention of claim 11 relates to the described liquid crystal indicator of claim 10, it is characterized in that having control electrode of electric field, and this electrode is provided with according to the mode that covers 1 edge part in above-mentioned source electrode lead or the above-mentioned grid lead at least.
By above-mentioned structure, owing to except the described effect of claim 10, also produce the effect of control electrode of electric field, so can compare the demonstration of Du Genggao.
The described invention of claim 12 relates to a kind of manufacture method of liquid crystal indicator, wherein at the clamping liquid crystal layer and the opposite face side of a substrate in two relative substrates forms source electrode lead and the grid lead be rectangular setting, each point of crossing of corresponding above-mentioned source electrode lead and grid lead and the on-off element that is provided with, the pixel capacitors that is connected with this on-off element, and relative pixel capacitors with this relatively and the public electrode that forms along above-mentioned source electrode lead, above-mentioned liquid crystal layer at least above-mentioned source electrode lead and and the pixel capacitors of its both sides adjacency or the spacer portion between the public electrode vertically directed, this liquid crystal indicator has control electrode of electric field, this control electrode of electric field is formed at above-mentioned another piece substrate on according to the mode of the edge part that covers 1 lead in above-mentioned source electrode lead or the above-mentioned grid lead at least, it is characterized in that, this method is included in when applying voltage on the control electrode of electric field, by ultraviolet ray to comprising the step that high molecular liquid crystal hardens.
By above-mentioned structure, can source electrode lead (or grid lead) and and the pixel capacitors (or public electrode) of its both sides adjacency between spacer portion at least 1 in form the vertical orientation zone of liquid crystal vertical orientation.
Below the 2nd group of invention is described.
About the 2nd group of invention, as the result who furthers investigate repeatedly, the inventor finds the electric field that produces at the above-mentioned source electrode lead electric field effects to display part, and has relevant relation between the amplitude as the electrode width of the parameter of the ingredient of liquid crystal molecule, electrode separation, substrate spacing, source signal.
Specifically, find following correlationship 1.～4.
1. since unwanted electric field intensity and source signal amplitude that the source electrode lead produces strengthen pro rata, so the public electrode that this electric field is shielded must be according to enlarging electrode width pro rata with the source signal oscillator intensity.Can find that electric field intensity and this source signal amplitude that general source electrode lead produces are proportional, still, then proportional between itself and public electrode that this electric field is shielded with 1n (referring to the natural logarithm to be the Log of constant).
2. in addition, owing to electric field intensity and distance are inversely proportional to, so if drive the pixel capacitors of liquid crystal and the electrode separation expansion of public electrode, owing to being difficult to be subjected to the electric field effects that the source electrode lead produces, so can make the public electrode narrowed width.
3. equally for the substrate spacing, if the substrate pitch smaller, owing to be difficult to be subjected to the electric field effects that the source electrode lead produces, so can make the public electrode narrowed width.
4. for the electric field shielding electrode that is arranged on the source electrode lead,,, necessarily require the above electrode width of source electrode lead because the effect of the electric field that shielding source electrode lead produces is not enough if less than the source electrode conductor width.
According to so above-mentioned correlationship 1.～4., the inventor has finished following invention.Concrete structure is as described below.
The described invention of claim 13 relates to liquid crystal indicator, wherein at the clamping liquid crystal layer and the opposite face side of a substrate in two relative substrates forms source electrode lead and the grid lead be rectangular setting, each point of crossing of corresponding above-mentioned source electrode lead and grid lead and the on-off element that is provided with, the pixel capacitors that is connected with this on-off element, and relative pixel capacitors with this relatively and the public electrode that forms along above-mentioned source electrode lead, it is characterized in that, on above-mentioned another piece substrate, the electric field shielding electrode is being set with above-mentioned source electrode lead position overlapped place, if the width of above-mentioned source electrode lead is represented by Ws, above-mentioned electric field shielding electrode width is represented by Wbm, above-mentioned public electrode width is represented by Wcom, spacing between above-mentioned two substrates is represented by d, supplying with the maximal value of the signal voltage amplitude of above-mentioned source electrode lead is represented by Vmax, spacing between above-mentioned pixel capacitors and the public electrode is represented by s, then satisfies following relational expression:
Wbm 〉=Ws, and Wcom 〉=51n (Vmax)+5d-s-15.
By above-mentioned structure, owing to no matter will become in fact what kind of effective value as the design by liquid crystal indicator of the analog value of the amplitude of the electrode separation of the ingredient parameter of liquid crystal cell, substrate spacing, source signal, all can shield fully, so the liquid crystal indicator that can obtain not crosstalk by the electric field that do not need that public electrode and electric field shielding electrode pair source electrode lead produce.
The described invention of claim 14 relates to the described liquid crystal indicator of claim 13, it is characterized in that, the electric field shielding electrode does not exceed the viewing area that is formed by public electrode and pixel capacitors.
By above-mentioned structure, the width of electric field shielding electrode is not excessive, can suppress the influence to display part.
The described invention of claim 15 relates to liquid crystal indicator, wherein at the clamping liquid crystal layer and the opposite face side of a substrate in two relative substrates forms source electrode lead and the grid lead be rectangular setting, each point of crossing of corresponding above-mentioned source electrode lead and grid lead and the on-off element that is provided with, the pixel capacitors that is connected with this on-off element, and relative pixel capacitors with this relatively and the public electrode that forms along above-mentioned source electrode lead, it is characterized in that, supply with the polarity of the picture signal of above-mentioned source electrode lead reverses in 1 frame at least repeatedly, on above-mentioned another piece substrate, the electric field shielding electrode is being set with source electrode lead position overlapped place, if the width of above-mentioned source electrode lead is represented by Ws, above-mentioned electric field shielding electrode width is represented by Wbm, above-mentioned public electrode width is represented by Wcom, spacing between above-mentioned two substrates is represented by d, supplying with the maximal value of the signal voltage amplitude of above-mentioned source electrode lead is represented by Vmax, spacing between above-mentioned pixel capacitors and the public electrode is represented by s, then satisfies following relational expression:
Wbm 〉=Ws, and Wcom 〉=51n (Vmax)+5d-s-17.
As mentioned above, in 1 frame, reverse at least repeatedly,, in fact diminish so the electric field intensity that the source electrode lead produces is compared with the described invention of claim 13 owing to put on the polarity of the picture intelligence on the grid lead.So, compare with the described invention of claim 13, can reduce public electrode width W com, and improve aperture opening ratio.
The described invention of claim 16 relates to the described liquid crystal indicator of claim 13, it is characterized in that, the electric field shielding electrode is the black matrix that is formed by conductive material.
The described invention of claim 17 relates to the described liquid crystal indicator of claim 13, it is characterized in that, the electric field shielding electrode is arranged on the black matrix, and the width of electric field shielding electrode is less than the width of black matrix.By above-mentioned structure, can form black matrix by resin material, so easy formation black matrix.
The described invention of claim 18 relates to the described liquid crystal indicator of claim 13, it is characterized in that, electric field shielding electrode and public electrode are electrically connected.
By above-mentioned structure, it is stable that the current potential of electric field shielding electrode keeps, and obtained the electric field shielding effect further.
The described invention of claim 19 relates to liquid crystal indicator, wherein at the clamping liquid crystal layer and the opposite face side of a substrate in two relative substrates forms source electrode lead and the grid lead be rectangular setting, each point of crossing of corresponding above-mentioned source electrode lead and grid lead and the on-off element that is provided with, the pixel capacitors that is connected with this on-off element, and relative pixel capacitors with this relatively and the public electrode that forms along above-mentioned source electrode lead, it is characterized in that, on above-mentioned another piece substrate with above-mentioned source electrode lead and above-mentioned public electrode at least one a part of position overlapped place the electric field shielding electrode is set, above-mentioned electric field shielding electrode and above-mentioned public electrode are electrically connected by the electric conductivity distance piece.
By above-mentioned structure, needn't be provided for making the special parts of electric field shielding electrode and public electrode conducting separately.
The described invention of claim 20 relates to the described liquid crystal indicator of claim 19, it is characterized in that, the electric conductivity distance piece is the projection with electric conductivity that is formed on any one substrate at least.
By above-mentioned structure, can omit the step of scattering distance piece, and the maintenance of the current potential of electric field shielding electrode is stable, can further obtain the electric field shielding effect.
The described invention of claim 21 relates to liquid crystal indicator, wherein at the clamping liquid crystal layer and the opposite face side of a substrate in two relative substrates forms source electrode lead and the grid lead be rectangular setting, each point of crossing of corresponding above-mentioned source electrode lead and grid lead and the on-off element that is provided with, the pixel capacitors that is connected with this on-off element, and relative pixel capacitors with this relatively and the public electrode that forms along above-mentioned source electrode lead, it is characterized in that, on above-mentioned another piece substrate, forming projection with above-mentioned public electrode position overlapped place, forming the electric field shielding electrode with above-mentioned source electrode lead position overlapped place, the part of above-mentioned electric field shielding electrode is formed on the above-mentioned projection, and above-mentioned electric field shielding electrode and public electrode are electrically connected.
The described invention of claim 22 relates to liquid crystal indicator, wherein at the clamping liquid crystal layer and the opposite face side of a substrate in two relative substrates forms source electrode lead and the grid lead be rectangular setting, each point of crossing of corresponding above-mentioned source electrode lead and grid lead and the on-off element that is provided with, the pixel capacitors that is connected with this on-off element, and relative pixel capacitors with this relatively and the public electrode that forms along above-mentioned source electrode lead, it is characterized in that, if above-mentioned public electrode width is represented by Wcom, spacing between above-mentioned two substrates is represented by d, supplying with the maximal value of the signal voltage amplitude of above-mentioned source electrode lead is represented by Vmax, spacing between above-mentioned pixel capacitors and the public electrode is represented by s, then satisfies following relational expression:
Wcom≥51n(Vmax)+5d-s-12。
As mentioned above, if increase public electrode width W com,, can shield fully the unwanted electric field that the source electrode lead produces by public electrode, so the liquid crystal indicator that can obtain not crosstalk because the electric field shielding electrode is not set.
The described invention of claim 23 relates to liquid crystal indicator, wherein at the clamping liquid crystal layer and the opposite face side of a substrate in two relative substrates forms source electrode lead and the grid lead be rectangular setting, each point of crossing of corresponding above-mentioned source electrode lead and grid lead and the on-off element that is provided with, the pixel capacitors that is connected with this on-off element, and relative pixel capacitors with this relatively and the public electrode that forms along above-mentioned source electrode lead, it is characterized in that, the polarity that puts on the picture intelligence on the above-mentioned source electrode lead is reversed repeatedly in 1 frame at least, if above-mentioned public electrode width is represented by Wcom, spacing between above-mentioned two substrates is represented by d, supplying with the maximal value of the signal voltage amplitude of above-mentioned source electrode lead is represented by Vmax, spacing between above-mentioned pixel capacitors and the public electrode is represented by s, then satisfies following relational expression:
Wcom≥51n(Vmax)+5d-s-15。
By above-mentioned structure, to compare with the described invention of claim 22, in fact the electric field intensity that the source electrode lead produces diminish.So, compare with the described invention of claim 22, can reduce public electrode width W com, can improve aperture opening ratio.
Fig. 1 is the planimetric map of the structure of the liquid crystal indicator of expression embodiments of the invention 1-1;
Fig. 2 is the cut-open view of the structure of the liquid crystal indicator of expression embodiments of the invention 1-1;
Fig. 3 is the cut-open view of the structure of the liquid crystal indicator of expression embodiments of the invention 1-2;
Fig. 4 is the voltage oscillogram of the drive waveforms of the liquid crystal indicator of expression embodiments of the invention 1-3;
Fig. 5 is the planimetric map of the pixel voltage polarity of the liquid crystal indicator of expression embodiments of the invention 1-3;
Fig. 6 is the planimetric map of the pixel voltage polarity of the liquid crystal indicator of expression embodiments of the invention 1-3;
Fig. 7 is the planimetric map of the pixel voltage polarity of the liquid crystal indicator of expression embodiments of the invention 1-3;
Fig. 8 is the planimetric map of the pixel voltage polarity of the liquid crystal indicator of expression embodiments of the invention 1-3;
Fig. 9 is the planimetric map of the structure of the liquid crystal indicator of expression embodiments of the invention 1-4;
Figure 10 is the planimetric map of the structure of the liquid crystal indicator of expression embodiments of the invention 1-4;
Figure 11 is the planimetric map of the structure of the liquid crystal indicator of expression embodiments of the invention 1-5;
Figure 12 is the planimetric map of the structure of the liquid crystal indicator of expression embodiments of the invention 1-6;
Figure 13 is the planimetric map of the structure of the liquid crystal indicator of expression embodiments of the invention 1-7;
Figure 14 is the figure of the structure of 1 pixel of the liquid crystal indicator among the expression embodiment 2-1;
Figure 15 is the cut-open view along the A-A ' line among Figure 14 of the liquid crystal indicator of expression embodiment 2-1;
Figure 16 is the figure of the situation of the electric field in the source electrode lead of the liquid crystal indicator of representing embodiment 2-1 in a schematic way and near its display part;
Figure 17 is the cut-open view of 1 pixel of the conversion example in the liquid crystal indicator that constitutes embodiment 2-1;
Figure 18 is the figure of the situation of the electric field of representing source electrode lead in the experiment embodiment 1 and near the display part it in a schematic way;
Figure 19 is the figure of the situation of the electric field of representing source electrode lead in the experiment embodiment 2 and near the display part it in a schematic way;
Figure 20 is the figure of the situation of the electric field of representing source electrode lead in the experiment embodiment 3 and near the display part it in a schematic way;
Figure 21 is the cut-open view of 1 pixel of the liquid crystal indicator of formation embodiment 2-3;
Figure 22 is the cut-open view of 1 pixel of the liquid crystal indicator of formation embodiment 2-4;
Figure 23 is the cut-open view of 1 pixel of the conversion example in the liquid crystal indicator that constitutes embodiment 2-4;
Figure 24 is the cut-open view of 1 pixel of the liquid crystal indicator of formation embodiment 2-5;
Figure 25 is the figure of the situation of the electric field of the source electrode lead of the liquid crystal indicator of representing embodiment 2-5 in a schematic way and near the display part it;
Figure 26 is the planimetric map of the structure of the existing liquid crystal indicator of expression;
Figure 27 is the cut-open view of the structure of the existing liquid crystal indicator of expression;
Figure 28 is the structure of the existing liquid crystal indicator of expression, and wherein, Figure 28 (A) is a cut-open view,
Figure 28 (B) is the planimetric map of the black matrix shown in Figure 28 (A), and Figure 28 (C) is the cut-open view of major part;
Figure 29 constitutes the planimetric map of 1 pixel of existing liquid crystal indicator for expression;
Figure 30 is for constituting the cut-open view along the A-A ' line among Figure 29 of existing liquid crystal indicator;
Figure 31 is the source electrode lead of the representing existing liquid crystal indicator in a schematic way figure with near the situation of the electric field of its display part.
Be used to realize preferred form of the present invention
[the 1st group of invention]
The 1st group of invention is characterised in that: vertically directed near the liquid crystal molecule that is positioned on the substrate source electrode lead or the grid lead.In addition,, just obtain such liquid crystal indicator, wherein can prevent the light leak of generation between source electrode lead (or grid lead) and the pixel capacitors (or public electrode) by such structure, the contrast height, and have high-quality display characteristic.
Provide as the concrete structure of the 1st group of invention and the embodiment 1-1～embodiment 1-8 of driving method thereof with way of example below.
(embodiment 1-1)
Fig. 1 is the planimetric map of the structure of the liquid crystal indicator of expression embodiments of the invention 1-1, and Fig. 2 is the cut-open view of the A-A ' line among Fig. 1.
In Fig. 1 and Fig. 2, label 1 expression array base palte, label 2 expression counter substrate.Array base palte 1 and counter substrate 2 are such as being transparent glass substrate.Label 3 expression public electrodes, it is pricked by common wire 13 and does up, and is in same potential.Label 5 expression pixel capacitors, by the transverse electric field that produces between this pixel capacitors 5 and the public electrode 3, with the face of substrate 1,2 keeping parallelisms in make the liquid crystal molecule in the liquid crystal layer 9 be rotated action.The width of pixel capacitors 5 and public electrode 3 is in the scope of 3～10mm, and the width of its clearance portion (spatial portion between both edges) is in the scope of 5～20mm, and the thickness of liquid crystal layer is in the scope of 2～10mm.
Label 4 expression source electrode leads, it provides picture signal.Size between source electrode lead 4 and the public electrode 3 that is adjacent is set in the scope of 2～5 μ m.Label 12 expression is used for grid lead that thin film transistor (TFT) (TFT) 14 is carried out switch motion, and it supplies with sweep signals to this grid lead 12.Source electrode lead 4 and grid lead 12 have branching portion, constitute thin film transistor (TFT) 14 with the leading section of semiconductor layer 5 and pixel capacitors 5.But thin film transistor (TFT) is identical with existing example (Figure 14), also can be formed on the grid lead.
Label 6 expression dielectric films, this film is used as the gate insulating film in the thin film transistor (TFT) 14, and source electrode lead 4 is separated with public electrode 13 with grid lead 12 with pixel capacitors 5.Label 7 expression control electrode of electric field, it is formed on the counter substrate 2 with source electrode lead 4 relative sides.In the present embodiment, control electrode of electric field 7 is formed by the transparency electrode of ITO etc.In the manner described above, in the present embodiment, because the relative source electrode lead 4 of medial surface in counter substrate 2 is provided with control electrode of electric field 7, so can be by the electric field that between source electrode lead 4 and control electrode of electric field 7, produces, make near the liquid crystal molecule of source electrode lead vertically directed, prevent the light leak between source electrode lead and the public electrode 3, can improve contrast.In addition, principle, effect and effect etc. about above-mentioned control electrode of electric field 7 will specifically describe in the back.
Label 8 expressions are used to carry out the colored color filter that shows.Though not shown in the drawings, on the inner surface of each substrate 1,2, form oriented film, limit the direction of orientation of the liquid crystal molecule at the interface of its liquid crystal layer 9.The direction of orientation of this liquid crystal for the bearing of trend keeping parallelism or the relative direction that it tilts slightly of pixel capacitors.Label 10 and 11 expression polaroids, it is vertical that both polarization axles keep basically mutually, and appoint can one according to being provided with the mode of the direction of orientation keeping parallelism of liquid crystal basically.
Action to the liquid crystal indicator of said structure is described below.If grid lead 12 is applied selection voltage, and (15～20V), then thin film transistor (TFT) 14 is in conducting state.At this moment, to source electrode lead 4 supply with show corresponding positive signal voltage (0～7V), by this signal voltage pixel capacitors 5 is charged.The current potential of public electrode 3 becomes 0V by common wire 13.Consequently, liquid crystal layer 9 is applied positive signal voltage.If after the pixel charging, grid lead is applied non-selection voltage, and (10V), then thin film transistor (TFT) 14 is in cut-off state, and the pixel current potential is held.
At next frame, (7～0V) to source electrode lead 4 supply signal voltages, identical with above-mentioned situation, and liquid crystal layer 9 is filled negative signal voltage with negative voltage.Consequently, drive liquid crystal with exchange way.
Contrast of LCD degree raising effect to present embodiment is described below.
If provide the current potential that equates with public electrode 3 (0V current potential) to control electrode of electric field 7, then the Electric Field Distribution in the cross section of liquid crystal indicator is a form shown in Figure 2.Promptly, relative situation about being top dog at the electric field E1 of the pixel pars intermedia relevant, horizontal direction with demonstration, there be not the periphery of the source electrode lead of direct relation with demonstration, the electric field E2 of perpendicular direction is top dog, and the unwanted horizontal component of electric field composition E3 that produces in existing scheme reduces significantly.Consequently, the relative real estate of liquid crystal molecule in the clearance portion 16 between source electrode lead and the common conductor erects.Because polaroid 10 and 11 polarization axle are perpendicular, the demonstration of this part is in black state, the high demonstration of light leak, contrast that can not have the electric field of source electrode lead 4 to cause.
In addition, in existing liquid crystal indicator,,, has the situation of consequent light leak so liquid crystal is not directed fully because above-mentioned clearance portion 16 is narrower than the public electrode 3 and the clearance portion between the pixel capacitors 5 of display part office.In the liquid crystal indicator of present embodiment, because clearance portion 6 is applied vertical electric field, thus whether well irrelevant with orientation, can make clearance portion 16 be in black state.Consequently, can there be light leak, demonstration that contrast is high.Also have, in the superincumbent description, provide be pixel capacitors 3 with the source electrode lead in any one be the occasion of positive potential.
Also advantage of the liquid crystal indicator of present embodiment is can obtain the effect that above-mentioned contrast improves under the situation of following aperture opening ratio to reduce hardly.Below this situation is described.
At first, existing liquid crystal indicator is described,, adopts the scheme that clearance portion is in the light by black matrix (BM) as the technology that improves contrast.Fig. 3 is the cut-open view of influence that is used to illustrate the black matrix of existing example.In the figure, label 201 and 202 expression substrates, label 203 expression public electrodes, label 204 expression source electrode leads, label 205 expression pixel capacitors, label 206 expression insulation courses, label 209 expression liquid crystal layers, label 210 and 211 expression polaroids.On substrate 202, form color filter 208 and BM217.This BM is used for the hidden light leak that produces from the clearance portion between the public electrode 203 of source electrode lead 204 and adjacency, but consider the factors such as dislocation edge when upper and lower base plate fitted, in both sides, its width (WBM) according to than and the viewing area lateral edges of the public electrode of source electrode lead adjacency between distance (L1) just the mode of big D1 set.In existing liquid crystal indicator,,, show deepening so aperture opening ratio is lower owing to can not utilize the light of this part (D1).
In the liquid crystal indicator of present embodiment, adopt the control electrode of electric field replacement black matrix that forms by transparency electrode, to and the public electrode of source electrode lead adjacency between clearance portion carry out shading light.According to this scheme, owing to two following reasons, aperture opening ratio improves.
The 1st, control electrode of electric field is used to obtain vertical electric field, needn't cover the whole width (L2) of this clearance portion.Therefore, can make the width (W) of control electrode of electric field be narrower than the BM width (WBM) of Fig. 3.
The 2nd, even under the situation outside (L1) part that control electrode of electric field exceeds among the figure because of dislocation waits, because it is a transparency electrode, so incomplete shading light, the reduction of brightness is very little.
If (W) is wide for the width of control electrode, then produce vertical electric field at pixel area, liquid crystal is not caused sufficient horizontal component of electric field, in addition, if above-mentioned width is narrow, the zone that then obtains vertical electric field reduces, and the electric field controls effect is insufficient.
According to the inventor's experiment effect, then obtain in the scope of relational expression (1)
L2-Wcom≤W≤L1 (1) particularly is preferably in relational expression (2)
Result in the scope of L2≤W≤L1 (2).
In addition,, then improve the effect that is in the light if adopt control electrode of electric field and black matrix simultaneously, in addition can the high demonstration of degree of comparing.In this occasion, needn't be as existing example, the width (WBM) that makes BM is greater than L1.
The liquid crystal indicator of present embodiment can be such as making in the following manner.
At first, on the 1st substrate 1, form the 1st conductive film layer that forms by aluminium alloy etc., pattern-making, acquisition grid lead 3, public electrode 3, common wire 13 by sputtering method etc.Then, after forming dielectric film 6, form the semiconductor layer 15 that forms by a-Si etc. by modes such as CVD methods.Then, form the 2nd conductive film layer that is formed by aluminium alloy etc. by modes such as sputtering methods, pattern-making obtains source electrode lead 4, pixel capacitors 5.After this, also can form the 2nd dielectric film, so that protection switch element or electrode.
Form these 3 kinds of colors of RGB and be the colour filter 8 that round point shape is arranged on the 2nd substrate 2, the transparent electrode material such as adopting ITO etc. forms control electrode of electric field 7.
On 2 substrates 1,2 of making in the manner described above, the coating oriented film grinds along prescribed direction, by sealant with periphery bonding after, inject liquid crystal 9, with its sealing, obtain liquid crystal board.After this, driving circuit is connected with the periphery of liquid crystal board, obtains liquid crystal indicator.
According to the liquid crystal indicator of present embodiment, because the effect of control electrode of electric field, the relative real estate of liquid crystal molecule of the clearance portion between source electrode lead and the common wire is erected, can make this part be in black state.Thus, there is not light leak that the electric field of source electrode lead causes or not because of directed insufficient light leak that causes of this gap portion, can the high demonstration of degree of comparing.In addition, in order to prevent light leak,,, can carry out brighter demonstration so aperture opening ratio improves owing in the viewing area, needn't be in the light by black matrix.
In the present embodiment, situation to public electrode and source electrode lead adjacency is described, if but even under the situation of pixel capacitors and source electrode lead adjacency, edge part at the source electrode lead forms control electrode of electric field, then according to same principle, contrast improves, and can carry out brighter demonstration than high aperture.
Also have, in the superincumbent description, control electrode of electric field 7 is formed at the liquid crystal layer side of colour filter 8, but obviously, this order also can be opposite.Promptly, also can form control electrode of electric field 7 at the medial surface of counter substrate 2, form color filter 8 according to the mode that covers this control electrode of electric field 7, occasion in such structure, produce certain loss of voltage that color filter causes, but, owing to can on color filter, not form electrode, so have the advantage of easy manufacturing.
(embodiment 1-2)
Present embodiment is following form, wherein in the liquid crystal indicator of describing by the foregoing description 1-1, by being in the light property metal, forms control electrode of electric field.
If the metal film by chromium etc. forms the control electrode of electric field 7 among Fig. 1 and Fig. 2, to replace transparency electrode, then because the effect that is in the light of electrode, contrast further improves.In the occasion of present embodiment, the dislocation when owing to applying at upper and lower base plate, control electrode of electric field 7 exceeds the occasion of viewing area, because the aperture opening ratio of itself reduction, so the width W of best control electrode of electric field is narrower than the 1st embodiment.
Experimental result according to inventor etc. then obtains in the scope of relational expression (3)
L2-Wcom≤W≤L1-Wcom (3) particularly is preferably in relational expression (4)
L2≤W≤L1-Wcom (4)
Scope in the result.
Also have, owing between L1 and L2, have
The relation of L1=L2+2 * Wcom (5), under above-mentioned condition, relational expression (3) is rewritten as
L2-Wcom≤W≤L2+Wcom (6)
Relational expression (4) is rewritten as
L2≤W≤L2+Wcom (7)
Therefore, in the liquid crystal indicator of present embodiment 1-2, also can be and satisfy relational expression (6), preferably satisfy the occasion of relational expression (7), to replace relational expression (3) and relational expression (4).
(embodiment 1-3)
Present embodiment relates to driving method, and this method is used for further improving contrast of LCD degree or the aperture opening ratio of describing at the foregoing description 1-1 or embodiment 1-2.
Fig. 4 is the drive waveforms of each electrode of presentation graphs 2.In the figure, symbol Vs represents to supply with to each pixel the current potential of the source electrode lead of picture signal, from image information, gets various crest values.The maximal value of crest value is 7V.The polarity of picture signal realizes counter-rotating during each 1H, consequently, as shown in Figure 5, the every row of the symbol of pixel current potential reverse (inversion driving at once).
Vg represents to provide the current potential of the source electrode lead of sweep signal, forms 15V during the selection of this row, formation-10V during non-selection.Vcom is the current potential of common potential, forms 0V.
Vf is the current potential of control electrode of electric field.In the driving method of present embodiment, Vf and Vs are the voltage of contrary sign.Below its effect is described.
As shown in Figure 2, the electric field E2 of perpendicular direction is produced by the voltage between source electrode lead 4 and the control electrode of electric field 7 (difference between Vs and the Vf).According to the driving method of present embodiment, Vs be on the occasion of occasion, Vf is a negative value, is the occasion of negative value at Vs, Vf be on the occasion of.So, be that the occasion of 0V is compared with Vf, in any occasion, the potential difference (PD) of Vs and Vf all enlarges, and the electric field intensity of E2 strengthens.Consequently, the contrast of display degree improves.In addition, even be narrower than under the situation of L2, still can obtain good characteristic in the width W of control electrode of electric field.
Having, as shown in Figure 2, is the occasion of public electrode 3 at the electrode with source electrode lead 4 adjacency again and since also between public electrode 3 and control electrode of electric field 7 generation basically with the perpendicular electric field of substrate, so the driving method of present embodiment presents higher effect.
In addition, in above-mentioned description, at each H, carry out capable inversion driving (Fig. 5) with the reversal of poles of signal voltage, but the driving method of present embodiment also is suitable for following inversion driving, and this inversion driving refers to write whole image by same polarity, at the frame inversion driving (Fig. 6) of every frame with reversal of poles, supply with the row inversion driving (Fig. 7) of the signal of opposite polarity or the round dot inversion driving of carrying out reversal of poles at each H of every row at every row.In any occasion, the polarity that all can make the voltage of supplying with control electrode of electric field is opposite with the source electrode voltage relative with it.
(embodiment 1-4)
Fig. 9 is the planimetric map of the structure of the liquid crystal indicator of expression the 4th embodiment of the present invention.The section of A-A ' is the shown in Figure 2 section identical with embodiment 1-1.In addition, carry out the action identical with embodiment 1-1 owing to have the part of the label identical with Fig. 1, the Therefore, omited is to its description.In the liquid crystal indicator of present embodiment, control electrode of electric field 7 covers the edge part of source electrode lead 4 and the two part of edge part of grid lead 12.Owing to be the occasion of in embodiment 1-1, describing mainly, also produce the electric field that fully forms by vertical at the grid lead periphery, so be suppressed from the light leak of grid lead peripheral part, contrast improves.
Obviously, control electrode of electric field also can be by any formation the in transparency electrode and the metal.If represent the spacing between the edge of the pixel capacitors of clamping grid line or public electrode with L2, the line width W that then is positioned at the control electrode of electric field of grid one side satisfies following relational expression (8),
L2-Wcom≤W (8) particularly preferably satisfies following relational expression (9)
L2≤W (9) can obtain good display characteristic.
Obviously, also can be according to the mode of embodiment 1-1, the current potential that offers control electrode of electric field forms the current potential identical with public electrode.Also can form opposite polarity current potential according to the mode shown in the embodiment 1-3 with the source electrode lead.Because as shown in Figure 4, the current potential of source electrode lead is-10V that if so in any occasion, all align the bias voltage that side applies 1V, the electric field between grid lead and the control electrode of electric field strengthens, the effect raising of being in the light of grid one side during major part.
In addition, in the round dot inversion driving of the row inversion driving of Fig. 7 or Fig. 8, be opposite for the polarity of the current potential of every row source electrode lead.In this occasion, opposite for the polarity of the current potential that makes control electrode of electric field and source electrode lead must be separated control electrode of electric field at every row.For the liquid crystal indicator that adopts present embodiment carries out such driving, as shown in figure 10, can between each row, grid lead be separated.
(embodiment 1-5)
Figure 11 is the planimetric map of the structure of the liquid crystal indicator of expression embodiments of the invention 1-5.Because the part identical with Fig. 1 carried out the action identical with embodiment 1-1, the Therefore, omited is to its description.
The difference of present embodiment and embodiment 1-1 is in the liquid crystal indicator of embodiment 1-5, only forms control electrode of electric field 7 in the marginal portion of grid lead 12, and the public electrode 3 of the both sides of source electrode lead 4 connects and the formation one in addition.Such structure is effective for the occasion of the light leak that does not have source electrode lead one side.Its reason is: in the liquid crystal indicator of present embodiment 1-5, portion very close to each other between source electrode lead 4 and the public electrode 3 that is adjacent not from the light leak of source electrode lead one side, can only form control electrode of electric field 7 in grid lead one side like this.
Also as in front as described in oneself,, grid lead is applied-non-selection voltage of 10V in the most of the time.So preferably the control electrode of electric field to present embodiment 1-5 applies 0V or certain positive voltage.
In addition, public electrode 3 is positioned at the lower floor of source electrode lead 4 in Figure 11, if but adopt such as forming the 3rd electrode layer, public electrode 3 being formed at the structure on the upper strata of source electrode lead 4, because will be from the electric field shielding of source electrode lead, so can further reduce the light leak of source electrode one side.
Also have, the structure that only forms control electrode of electric field 7 in the marginal portion of grid lead 12 is not limited to the occasion that source electrode lead 4 overlaps with the public electrode 3 of its both sides, obviously, it is for such as the clearance portion between the public electrode 3 of source electrode lead 4 and its both sides, and the occasion that does not have source electrode lead one side leakage light that forms the occasion etc. of light blocking layer is effective.
(embodiment 1-6)
Figure 12 is the planimetric map of the structure of the liquid crystal indicator of expression embodiments of the invention 1-6.Because the part identical with Fig. 1 carried out the action identical with embodiment 1-1, the Therefore, omited is to its description.
The difference of present embodiment and embodiment 1-1 (Fig. 1) is in the liquid crystal indicator of embodiment 1-6, is provided with the vertical orientation zone 21 of liquid crystal at the source electrode lead 4 and the periphery of grid lead 12, to replace control electrode of electric field 7.
If adopt this mode, the clearance portion between source electrode lead and the common wire or the liquid crystal molecule at grid lead periphery place are in the state that relative real estate erects.Because the polarization axle of polaroid 10,11 is with the vertical mode setting, so the demonstration of this part is in black state, the light leak that does not have the electric field of source electrode lead 4 or grid lead 12 to cause can the high demonstration of degree of comparing.
The liquid crystal indicator of present embodiment 1-6 can be such as making in the following manner.
At first, according to the order identical with embodiment 1-1, formation is rectangular the 1st substrate that is formed with thin film transistor (TFT).On the 2nd substrate 2, form these 3 kinds of colors of RGB and be the colour filter 8 that round point shape is provided with.
On 2 substrates making in the manner described above, apply the 1st oriented film, grind along prescribed direction.Then, only form the 2nd oriented film (vertical orientation film) in the vertical orientation zone.This step can be carried out like this, such as the vertically-guided film is being coated on the whole surface, afterwards, and by photoetching technique, pattern-making.Then, by sealant that periphery is bonding, inject liquid crystal, with its sealing, and obtain liquid crystal board.Driving circuit is connected with the periphery of liquid crystal board, obtains liquid crystal indicator.
(embodiment 1-7)
In the present embodiment, with the vertical orientation zone of also having of adopting simultaneously of control electrode of electric field described in the foregoing description 1-6.If in this manner, both effects multiply each other, and then can obtain the liquid crystal indicator that contrast increases substantially.
Manufacture method to the liquid crystal indicator of present embodiment is described below.
At first, according to the order identical with embodiment 1-1, formation is rectangular the 1st substrate that is formed with thin film transistor (TFT).On the 2nd substrate 2, form these 3 kinds of colors of RGB and be the colour filter 8 that round point shape is provided with.
On 2 substrates making in the manner described above, the coating oriented film grinds along prescribed direction.After this, by sealant periphery is carried out bondingly, obtain not inject the plate (hollow plate) of liquid crystal.Be formed with control electrode of electric field in this hollow plate, its such as, be the form of the planimetric map of Fig. 9.
In this hollow plate, injection comprises the indurative polymkeric substance of the UV of percentage by weight in 0.01～11% scope, and it is sealed.After this, make grid lead 12, source electrode lead 4 and common wire 13 all be in ground state, when control electrode of electric field 7 is applied the alternating voltage of ten～tens of V,, polymkeric substance is hardened this plate irradiation UV light.Because alternating voltage is positioned at control electrode of electric field 7 following liquid crystal molecules and is in the state of erecting, it can only form the vertical orientation zone by fixing through the polymkeric substance of UV sclerosis below control electrode of electric field 7.At control electrode of electric field 7 are transparent occasions, preferably from control electrode of electric field 7 one sides irradiation UV, be not such occasion, from thin film transistor base plate one side irradiation UV.The periphery of driving circuit with the liquid crystal board that obtains in this manner is connected, makes liquid crystal indicator.
According to the manufacture method of present embodiment 1-7, have following advantage, promptly oriented film only is a kind, in addition, need not to carry out the design producing of trickle oriented film.In addition, there is not following situation yet, the arrangement dislocation during promptly owing to formation vertical orientation film, the vertical orientation film enters the viewing area, and aperture opening ratio reduces.
In addition, when the irradiation of UV light, if utilize the mask of the viewing area that covers each pixel, because in the display part, polymkeric substance is unhardened, so can obtain better display characteristic.
(embodiment 1-8)
Figure 13 represents the planimetric map of the liquid crystal indicator of embodiment.Because the action of each several part is identical with embodiment 1-1, this each several part has the label identical with Fig. 1, and the Therefore, omited is to its description.Present embodiment 1-8 forms electrode structure, wherein in the structure of Fig. 1, connects the end of public electrode and the comb type is sealed.For such structure, identical with embodiment 1-1, also can obtain the contrast height, the liquid crystal indicator that aperture opening ratio is higher.
In addition, the comb-type electrode of any embodiment that provides in the above embodiments 1-2～embodiment 1-6 sealing that all can provide with present embodiment is combined.
In above-mentioned 7 embodiment, control electrode of electric field covers source electrode lead or grid lead fully, still, if cover the marginal portion at least, then can obtain sufficient effect of the present invention.Such as, if adopt the structure of the control electrode of electric field of the pars intermedia that connects source electrode lead or grid lead, the load capacity of these leads is reduced, reduce the distortion of signal waveform, can prevent the uneven generation of demonstration that big picture shows.
[the 2nd group of invention]
The 2nd group of invention is characterised in that in the following manner and forms that this mode is: carry out the electric field shielding that produced by the source electrode lead fully, the degree that indicating characteristic in the viewing area is not impacted until this electric field.In addition,, can prevent the generation of crosstalking, obtain to have the liquid crystal indicator of high-quality display characteristic by such structure.
Concrete structure as the 2nd group of invention provides embodiment 2-1～embodiment 2-4 below by example.
(embodiment 2-1)
Figure 14 is the figure of the structure of 1 pixel of the liquid crystal indicator among the expression embodiments of the invention 2-1, Figure 15 is the cut-open view along the B-B ' line among Figure 14, Figure 16 is the cut-open view along the A-A ' line among Figure 14, and this figure represents the situation of the electric field of source electrode lead and near the display part it in a schematic way.In addition, with Figure 29 and the identical part of existing example shown in Figure 30, adopt identical label, the Therefore, omited is to its specific descriptions.
In Figure 14, the grid lead of the sweep signal that gate driver circuits produce is supplied with in label 51 expression, and label 52a, 52b represent to supply with the source electrode lead of the picture signal that source electrode drive circuit produces.In addition, for convenience of description, label 52a represents to be positioned at the source electrode lead on the right side of Figure 14, and label 52b represents to be positioned at the source electrode lead in the left side of Figure 14, and in addition, when general designation source electrode lead, it is by label 52 expressions.Near the cross part between this source electrode lead 52 and the grid lead 51, form TFT55 as the on-off element that forms by semiconductor layer.The pixel capacitors that label 53 expressions are connected with source electrode lead 52 by TFT55, the public electrode of label 54 expressions formation reference potential.This public electrode 54 passes through common wire 54c conducting at each pixel.Also have, above-mentioned grid lead 51, source electrode lead 52, TFT55, pixel capacitors 53 and public electrode 54 etc. is formed on the array base palte 60.
Also have, label 80 expressions are formed at the electric field shielding electrode on the counter substrate 61, and the effect of this electrode is according to the mode that electric field that is produced by source electrode lead 52 is not impacted above-mentioned electric field to be shielded.In the present embodiment, electric field shielding electrode 80 is an opaque electrode, and it is simultaneously as black matrix (BM).So, the electric conductivity that the electric field shielding electrode 80 of present embodiment is equivalent to Figure 29 and the existing example shown in Figure 30 film 58 that is in the light.This electric field shielding electrode 80 is provided with according to the mode that covers the clearance portion between above-mentioned grid lead 51 (or source electrode lead 52) and the pixel capacitors 53 (or public electrode 54) at least.
In addition, label 59 expression color filters, it is formed at the peristome between the above-mentioned electric field shielding electrode 80, at each pixel, chromatograph with any color in redness, green, the blueness in entire liquid crystal display device, is provided with this 3 kinds of colors according to repeatedly mode.Array base palte 60 of Xing Chenging and counter substrate 61 keep relatively by liquid crystal 57 by when interspersing among the hollow bead (not shown) maintenance certain clearance on the substrate in the manner described above, will seal on every side by sealant, thereby form liquid crystal board.
The source signal driving circuit is connected with source electrode lead in the liquid crystal board that constitutes in the manner described above, gate driver circuit is connected with the grid wiring end, provides control signal or power supply to the components of drive circuit that is positioned at IC on the corresponding driving circuit etc. by slave controllers such as flat cables.In addition, the source signal that the source signal driving circuit produces is the signal in each frame reversal of poles, carries out the row inversion driving thus.
It should be noted that the width W com of public electrode 54 and the width W bm of electric field shielding electrode 80 constitute according to the mode that satisfies following relational expression here.
Wbm≥Ws …(10)
And Wcom 〉=51n (Vmax)+5d-s-15 ... (11)
In the above-mentioned relation formula, symbol Ws represents the source electrode lead, symbol Wbm represents the electric field shielding electrode width, symbol Wcom represents the width of public electrode, symbol d represents the distance between 2 substrates 60,61, symbol Vmax represents the maximal value of the signal voltage amplitude of supply source polar conductor, and symbol s represents the spacing between pixel capacitors 53 and the public electrode 54.
As mentioned above, constitute the width W com and the electric field shielding electrode 80 of public electrode 54 according to the mode that satisfies above-mentioned relation formula (10), (11), can shield the electric field that produces by source electrode lead 52 fully thus, obtain to have the liquid crystal indicator of the high-quality display characteristic of not crosstalking.
Also have, in the occasion that constitutes the width W com and the electric field shielding electrode 80 of public electrode 54 according to the mode that satisfies above-mentioned relation formula (10), (11), obtaining does not have the reason of the above-mentioned high-quality display characteristic of crosstalking to specifically describe in the back.
The liquid crystal indicator of present embodiment is such as making in the following manner.
At first, forming the on glass of array base palte, forming with aluminium (Al) by modes such as sputtering methods be the 1st conduction tunic of major component, afterwards by photoetching process in the pattern-making of same plane, acquisition grid lead 51, public electrode 54, common wire 54c.Then, by the insulation course 54c of the stacked silicon nitride of modes such as CVD method (SiNx) etc., then, form the semiconductor layer that forms by a-Si etc. by CVD method etc.In addition, the step by identical with the 1st conductive layer forms the 2nd conductive film layer, and pattern-making obtains source electrode lead 52, pixel capacitors 53 and TFT55.Then, in order to protect TFT or electrode, also can form the 2nd dielectric film.In addition, be the less metal of conductor resistance preferably as the material that conductive layer adopted, still, be not defined in the metal of aluminium system especially, in addition, promptly can be monofilm, also can be multilayer film.
On the other hand, on the glass substrate that forms counter substrate 61, form the Metal Cr film, then, in the pattern-making of same plane, obtain the black matrix (being equivalent to electric field shielding electrode 80) of electric conductivity by photoetching process by modes such as sputtering methods.Then, make the pattern of resin successively, obtain to be the colour filter 59 of round point shape with the versicolor pigment in these 3 kinds of colors of RGB.Afterwards, for the pollution that prevents that Cr etc. from causing, also can on whole counter substrate 61, form outer coating by the resin of acrylic acid series etc. to liquid crystal layer.
According to being to apply oriented film on 2 substrates 60,61 of making of aforesaid way, grind along prescribed direction, clamping has the state of interlaminar resin spacing body between substrate 60,61, by sealant that periphery is bonding, then, inject liquid crystal 57, its sealing is obtained liquid crystal board.After this, driving circuit is connected with the periphery of liquid crystal board, obtains liquid crystal indicator.
The action of this liquid crystal indicator is as described below.
At first, by the signal that controller sends, sweep signal is supplied with each grid lead 51 successively from gate driver circuit, and picture signal is supplied with each source electrode lead 52 from source electrode drive circuit.Then, make the TFT55 that is connected with grid lead carry out switch motion selectively, be in conduction period, supply with pixel capacitors by TFT by the picture signal that source electrode lead 52 is supplied with at TFT55 by the sweep signal of supplying with by grid lead 51.Supply with the current potential of this pixel capacitors 53 and form between the current potential of public electrode 54 of reference potential, produce electric field, the action of liquid crystal 57 directed between electrode is controlled.Array base palte side at this liquid crystal board is provided with the back of the body illuminator that is formed by cold-cathode tube, in the manner described above liquid crystal is controlled by the light that this back of the body illuminator produces, and carries out gray scale thus and shows.
Below the principle as the electric field shielding of principal character of the present invention is described.In the present embodiment, in the manner described above, if the source electrode conductor width is represented by Ws, the electric field shielding electrode width is represented that by Wbm the width of public electrode is represented that by Wcom the spacing between above-mentioned 2 substrates is represented by d, supplying with the maximal value of the signal voltage amplitude of above-mentioned source electrode lead is represented by Vmax, spacing between above-mentioned pixel capacitors and the public electrode is represented by s, then constitutes according to the mode that satisfies following relational expression
Wbm≥Ws …(10)
And Wcom 〉=51n (Vmax)+5d-s-15 ... (11)
If constitute in the manner described above, then the reason that can fully shield the electric field that source electrode lead 52 produces will specifically describe below.
The result who furthers investigate repeatedly as the inventor finds the influence that the electric field that produces at above-mentioned source electrode lead causes the electric field of display part, as the electrode width of the parameter of the element of liquid crystal cell, electrode separation, the substrate spacing between the amplitude of source signal, has correlationship.
Specify as follows.
1. the relation between relevant with the electric field of the source electrode lead generation public electrode width W com and the amplitude of source signal
Because the unwanted electric field intensity that the source electrode lead produces is according to increasing with source signal amplitude mode pro rata, thus must be proportional to the public electrode of this electric field shielding with the source signal oscillator intensity, the increase electrode width.Find that the electric field intensity that general source electrode lead produces is also proportional with this source signal amplitude, but above-mentioned intensity is proportional with 1n (referring to that natural logarithm is the Log of constant) between to the public electrode of this electric field shielding.
So, for the electric field shielding that the source electrode lead is produced, consider the maximal value Vmax of source signal amplitude, it is believed that public electrode width W com must be at least greater than k11n (Vmax) (still, k1 be a constant).
2. relevant with the electric field of source electrode lead generation public electrode width W com and the relation between the electrode separation s
Because electric field intensity is inversely proportional to distance, so when pixel capacitors that drives liquid crystal and the increase of the electrode separation s between the public electrolysis, owing to be difficult to be subjected to the electric field effects that the source electrode lead produces, so can reduce public electrode width W com.So, when definite public electrode width W com, k2s must be considered (still, k2 is a constant) as parameter.
3. between relevant public electrode width W com of the electric field that produces with the source electrode lead and the substrate apart from the relation between the d
Equally between the substrate apart from d, if reducing between this substrate apart from d owing to be difficult to be subjected to the electric field effects that the source electrode lead produces, so can reduce the public electrode width.So, when definite public electrode width W com, k3d must be considered (still, k3 is a constant) as parameter.
4. relevant with the electric field of source electrode lead generation electric field shielding width W bm and the relation between the source electrode conductor width Ws
For the electric field shielding electrode that is arranged on the source electrode lead, if it is less than the source electrode conductor width, owing to the effect that can't obtain the electric field that the source electrode lead produces is shielded fully, so necessarily require the above electrode width of source electrode lead.
According to 1. above-mentioned～4. correlationship, draw following inference, promptly as the scheme of the liquid crystal indicator of the unwanted electric field that is used for effectively avoiding the source electrode lead to produce, these two conditionals of conditional of the Wbm 〉=Ws that must satisfy the conditional (still, k3 is a constant) of Wcom 〉=k11n (the Vmax)+k2d-k3s-k4 that derives according to 1. above-mentioned～3. correlationship and derive according to above-mentioned correlationship 4..
Have, according to above-mentioned inference, above-mentioned constant k 1 is calculated in experiment by inventor etc. etc. again, k2, and k3, the fit value of k4 draws the conditional of Wcom 〉=51n (Vmax)+5d-s-15.
In addition, according to inventor's etc. experimental result, preferably can satisfy the conditional of Wcom 〉=51n (Vmax)+5d-s-12, if such conditional, the effect of electric field shielding further improves, and can crosstalk to be the demonstration of the level that can recognize hardly.
In the liquid crystal indicator of present embodiment, the source electrode conductor width is 6 μ m, the electric field shielding electrode width is 16 μ m, the substrate spacing is 4 μ m, the maximal value of the signal voltage amplitude of supply source polar conductor 52 is 14v, spacing between pixel capacitors 53 and the public electrode 54 is 10 μ m, and the width that makes public electrode 54 is that 9 μ m are so that satisfy above-mentioned conditional.In addition, the current potential of the public electrode 54 of this moment is the 7V as the intermediate value of source signal, pixel capacitors 53 is alternately applied be used to carry out 10V and the 4V that grey shows.By this scheme, as shown in figure 16,,, obtain the good transmitance that inhibition is crosstalked and taken place so can the electric field that source electrode lead 52 produces be shielded fully because the width of public electrode 54 is enough big.
In above-mentioned example, the electric field shielding electrode adopts black matrix simultaneously, but as shown in figure 17, also can be the scheme of the independent electric field shielding electrode 80a of on black matrix 58 formation.In this occasion, as the formation material of black matrix 58, because unnecessary differentiate is electrical, thus can adopt resin material, such as forming black matrix 58 simply by the coating process of spin coated etc.In addition,, suppress the influence of electric field, can realize being in the light fully by black matrix 58 along the view directions that tilts to display part M by electric field shielding electrode 80a.
In addition, as a conversion example again, also can be with electric field shielding electrode 80 (80a) and public electrode 54c conducting, in this manner, it is stable that the current potential of electric field shielding electrode 80 (80a) keeps, and obtains the electric field shielding effect more.
Also have, if the spacing between source electrode lead 52b and the public electrode 54 is represented then above-mentioned conditional (10) by L, (11) in addition, by the formula Wbm≤Ws+2L+2Wcom that also satisfies condition simultaneously, the electric field shielding electrode is not increased to more than the essential value, can suppress the reduction of aperture opening ratio.
In addition, the inventor etc. have carried out following experiment at following aspect, this aspect refers to that the electric field that produces with the source electrode lead is relevant, between the amplitude of electrode width, electrode separation, substrate spacing, source signal, have above-mentioned correlationship, and the validity of Wcom 〉=51n (the Vmax)+5d-s-15 that derives from this correlationship.
(experiment embodiment 1)
Except the public electrode width is 7 μ m, make the liquid crystal indicator of the structure identical with the foregoing description 2-1, the maximal value Vmax of the source signal amplitude of supply source polar conductor 2 is according to 14v, 8v, 5v applies.Figure 18 (a)～(c) represents the electric field of this moment and the situation that transmitance distributes respectively.
Maximal value Vmax at the source signal amplitude is the occasion of 8v, 5v, satisfies Wcom 〉=51n (Vmax)+5d-s-15, and the transmitance of display part that relatively is not subjected to the occasion of the electric field effects that the source electrode lead produces distributes, and it is controlled in positive 10%.
Relative therewith, because the occasion of 14v does not satisfy the above-mentioned relation formula,, confirm to crosstalk so increase greater than 30% transmitance distribution.
So, confirm that the maximal value Vmax of source signal amplitude impacts the electric field that the source electrode lead produces, if fully satisfy Wcom 〉=51n (Vmax)+5d-s-15, then confirm can prevent to crosstalk.
In addition, in the occasion of 5v, satisfy Wcom 〉=51n (Vmax)+5d-s-12, the rising that transmitance distributes is controlled in 5%, crosstalks to be beyond all recognition value almost.So, verified, preferably must satisfy Wcom 〉=51n (Vmax)+5d-s-12.
(experiment embodiment 2)
Make following liquid crystal indicator, electrode separation s between public electrode and pixel capacitors is that 15 μ m, public electrode width W com are the 7 μ m, other structure of this liquid crystal indicator is identical with the foregoing description 2-1, applies the maximal value Vmax of the source signal amplitude of supply source polar conductor 2 with 15v.Figure 19 represents the electric field of this moment and the situation that transmitance distributes.
Because in this occasion, electrode separation s increases, so according to Wcom 〉=51n (the Vmax)+5d-s-15 that is adopted among the embodiment 2-1, can make the public electrode width greater than 4 μ m, because the public electrode width is 7 μ m, so can suppress the rising that transmitance distributes, the generation that can suppress to crosstalk.
So, for the electric field that effectively the source electrode lead is produced shields, when reducing electrode separation s, confirm that public electrode width W com narrows down, if fully satisfy Wcom 〉=51n (Vmax)+5d-s-15, then confirm can prevent to crosstalk.
(experiment embodiment 3)
Make following liquid crystal indicator, substrate spacing d between array base palte and opposite electrode is that 3.5 μ m or 3 μ m, public electrode width W com are the 7 μ m, other structure of this liquid crystal indicator is identical with the foregoing description 2-1, applies the maximal value Vmax of the source signal amplitude of supply source polar conductor 2 with 1.5v.Figure 20 (a) and (b) are represented the electric field of this moment and the situation that transmitance distributes.Figure 20 (a) expression substrate spacing d is the occasion of 3.5 μ m, and Figure 20 (b) expression substrate spacing d is the occasion of 3 μ m.In this experiment embodiment 3, owing to substrate spacing d narrows down, if according to Wcom 〉=51n (the Vmax)+5d-s-15 that is adopted among the embodiment 2-1, can make public electrode greater than 6 μ m, because the public electrode width is 7 μ m, then can suppresses the rising that transmitance distributes, and suppress the generation of crosstalking.
So, for the electric field that effectively the source electrode lead is produced shields,, then confirm public electrode Wcom is narrowed down if reduce the substrate spacing, if fully satisfy Wcom 〉=51n (Vmax)+5d-s-15, then susceptible of proof prevents to crosstalk.
(embodiment 2-2)
Adopt the liquid crystal indicator of embodiment 2-1, in each scan period, make the some inversion driving of the reversal of poles of the picture signal of supplying with by source electrode drive circuit, in addition from the sweep signal of gate driver circuit supply, the width of public electrode 4 is 7 μ m, and satisfies following relational expression
Wbm≥Ws …(10)
And Wcom 〉=51n (Vmax)+5d-s-17 ... (12) according to moving with the mode of embodiment 2-1.In addition, the picture signal of supplying with from source electrode drive circuit for have the peak swing shown in Fig. 4 (a)-7V～+ signal of the signal waveform of 7V.
According to said structure, because the reversal of poles with the source electrode lead in each scan period, so the electric field intensity that the source electrode lead produces is in fact less than embodiment 2-1, thus, above-mentioned relatively conditional (11), can reduce public electrode width (formula that satisfies condition (12)), the aperture opening ratio raising with itself can obtain brighter liquid crystal indicator.
(embodiment 2-3)
Figure 21 is the figure of the section of a pixel of the liquid crystal indicator of expression formation embodiments of the invention 2-3, the figure shows and near the essentially identical portion of the section shown in Figure 15 of embodiment 2-1.
The distance piece 62a that present embodiment and embodiment 2-1 difference are to be used to form the substrate spacing d between array base palte 60 and the counter substrate 61 has electric conductivity, in addition, this electric conductivity distance piece 62a is with the two contacts as the electric field shielding electrode 80 of black matrix and public electrode 54 simultaneously, by this electric conductivity distance piece 62a, electric field shielding electrode 80 is realized conducting with public electrode 54.
Pass through said structure, can omit wiring or the step of electric field shielding electrode 80 with public electrode 54 conductings, in addition owing to common distance piece scatters according to the ratio of each pixel more than 1, so electric field shielding electrode 80 keeps evenly obtaining more stable electric field shielding effect on the whole surface of liquid crystal board with the current potential of public electrode 54.
(embodiment 2-4)
Figure 22 is the figure of the section of a pixel of the liquid crystal indicator of expression formation embodiments of the invention 2-4, the figure shows and near the essentially identical portion of the section shown in Figure 21 of embodiment 2-3.
The distance piece 62b that present embodiment and the difference of embodiment 2-3 are used to form the substrate spacing d between array base palte 60 and the counter substrate 61 in outstanding mode, becomes integral body to be formed on the electric field shielding electrode 80 of counter substrate 61, and this projection has electric conductivity, this electric conductivity distance piece 62b contacts with public electrode 54, by this electric conductivity distance piece 62b, electric field shielding electrode 80 is realized conducting with public electrode 54.
By above-mentioned structure, can omit the step of scattering distance piece, in addition, the position of distance piece can be fixed, so can contact with public electrode 54 really, the current potential of electric field shielding electrode 80 and public electrode 54 is more even on the whole surface of liquid crystal board, obtains more stable electric field shielding.
In addition, as shown in figure 23, also can form the different structure of electric field shielding electrode 81a and black matrix 58, and, form this electric field shielding electrode 81a according to the mode that covers above-mentioned distance piece 62b and black matrix 58.
(embodiment 2-5)
Figure 24 is the figure of the dissection surface of a pixel of the liquid crystal indicator of expression formation embodiments of the invention 2-5, the figure shows near the essentially identical portion of section of Figure 15 of embodiment 2-1.
The difference of present embodiment and embodiment 2-1 is the electric field shielding electrode is not set on counter substrate 61, and the width of public electrode 54 is 10 μ m, so that satisfy following relational expression
Wcom≥51n(Vmax)+5d-s-12 …(13)。
According to said structure, as the formation material of black matrix 58, owing to must have electric conductivity,, can pass through coating process such as spin coated etc. so can adopt resin material, form black matrix simply.In addition, owing to also can not form independent electric field shielding electrode, so can simplify step.
Also have, according to said structure, even as shown in figure 25, in not forming on the counter substrate 61 under the situation of electric field shielding electrode 61, public electrode 54 still forms with fully bigger width, can the electric field that source electrode lead 52 produces be shielded fully thus, the good transmitance of the generation that the acquisition inhibition is crosstalked distributes.
(embodiment 2-6)
Adopt the liquid crystal indicator of embodiment 2-5, in each scan period of the sweep signal of supplying with from gate driver circuit, make the reversal of poles of the picture signal of being supplied with by source electrode drive circuit, the width that makes public electrode 54 is 7 μ m, so that satisfy following relational expression
Wcom 〉=51n (Vmax)+5d-s-15 ... (14) and according to the mode identical move with embodiment 2-5.
According to said structure, because in each scan period, the reversal of poles of source electrode lead, so the electric field that the source electrode lead produces is in fact less than embodiment 2-1, thus, the width that can make public electrode is less than above-mentioned conditional (13) (formula that satisfies condition (14)), and the aperture opening ratio raising with itself can obtain brighter liquid crystal indicator.
Utilize possibility on the industry
If adopt in the manner described above structure of the present invention, can solve fully variety of issue of the present invention. Particular content is as described below.
(1) owing to near the liquid crystal liquid crystal indicator or the grid lead, applies with substrate perpendicular Electric field, liquid crystal molecule are towards the substrate vertical direction, so prevent light leak, raising contrast.
(2) process owing near the liquid crystal polarity source electrode lead or the grid lead being carried out vertical orientation, so Prevent light leak, improve contrast.
(3) since need not be used to the black matrix that prevents near the light leak source electrode lead or the grid lead, maybe can with The width of this black matrix reduces, thus can improve aperture opening ratio, and carry out brighter demonstration.
(4) owing to adopt control electrode of electric field that the vertically-guided zone is set, thus can be by simple technology, Form the vertical orientation zone of high position precision.
(5) according to above-mentioned (1)～(4), owing to can make wide visual angle, high contrast by low cost process The liquid crystal indicator of degree, high brightness is great so be worth on the industry.
(6) no matter what the parameter of the part of liquid crystal indicator is, all can suppress the source electrode lead The unwanted electric field that produces can provide the high liquid crystal indicator of display quality of not crosstalking and taking place.

Claims (23)

1. liquid crystal indicator is wherein at the clamping liquid crystal layer and the opposite face side of a substrate in two relative substrates forms each point of crossing of the source electrode lead that is rectangular setting and grid lead, corresponding above-mentioned source electrode lead and grid lead and the on-off element that is provided with, the pixel capacitors that is connected with this on-off element and relative pixel capacitors with this are relative and the public electrode that forms along above-mentioned source electrode lead;
It is characterized in that, on another piece substrate in above-mentioned a pair of substrate control electrode of electric field is set, this control electrode of electric field is provided with according to the mode of the edge part that covers above-mentioned source electrode lead.
2. liquid crystal indicator according to claim 1 is characterized in that above-mentioned control electrode of electric field is formed by transparency material.
3. liquid crystal indicator according to claim 2, it is characterized in that, with the edge spacing far away of the pixel capacitors of the both sides adjacency of corresponding source electrode lead or public electrode by L1 represent, nearer edge spacing is by the occasion that L2 represents, the width of above-mentioned pixel capacitors or public electrode is represented by Wcom, then the width W of above-mentioned control electrode of electric field is satisfying following relational expression
In the scope of L2-Wcom≤W≤L1.
4. liquid crystal indicator according to claim 1 is characterized in that above-mentioned control electrode of electric field is formed by nontransparent material.
5. liquid crystal indicator according to claim 4, it is characterized in that, with the edge spacing far away of the pixel capacitors of the both sides adjacency of corresponding source electrode lead or public electrode by L1 represent, nearer edge spacing is by the occasion that L2 represents, the width of above-mentioned pixel capacitors or public electrode is represented by Wcom, then the width W of above-mentioned control electrode of electric field is satisfying following relational expression
In the scope of L2-Wcom≤W≤L2+Wcom.
6. liquid crystal indicator is wherein at the clamping liquid crystal layer and the opposite face side of a substrate in two relative substrates forms each point of crossing of the source electrode lead that is rectangular setting and grid lead, corresponding above-mentioned source electrode lead and grid lead and the on-off element that is provided with, the pixel capacitors that is connected with this on-off element and relative pixel capacitors with this are relative and the public electrode that forms along above-mentioned source electrode lead;
It is characterized in that, on another piece substrate in above-mentioned a pair of substrate control electrode of electric field is set, this control electrode of electric field is provided with according to the mode of the edge part that covers above-mentioned grid lead.
7. liquid crystal indicator according to claim 6 is characterized in that, above-mentioned control electrode of electric field also covers near the portion of above-mentioned source electrode lead.
8. liquid crystal indicator according to claim 1 is characterized in that the induced anisotropy of above-mentioned liquid crystal layer is positive.
9. the driving method of a liquid crystal indicator, wherein the opposite face side of a substrate in two relative substrates of clamping liquid crystal layer forms each point of crossing of the source electrode lead be rectangular setting and grid lead, corresponding above-mentioned source electrode lead and grid lead and the on-off element that is provided with, the pixel capacitors that is connected with this on-off element and relative pixel capacitors with this are relative and the public electrode that forms along above-mentioned source electrode lead, the control electrode of electric field that setting coincides with the source electrode lead basically on another piece substrate in above-mentioned a pair of substrate;
It is characterized in that, the opposite polarity voltage with the voltage that puts on above-mentioned source electrode lead is put on the above-mentioned control electrode of electric field.
10. liquid crystal indicator is wherein at the clamping liquid crystal layer and the opposite face side of a substrate in two relative substrates forms each point of crossing of the source electrode lead that is rectangular setting and grid lead, corresponding above-mentioned source electrode lead and grid lead and the on-off element that is provided with, the pixel capacitors that is connected with this on-off element and relative pixel capacitors with this are relative and the public electrode that forms along above-mentioned source electrode lead;
It is characterized in that, above-mentioned liquid crystal layer forms the vertical orientation zone, this zone liquid crystal in advance above-mentioned source electrode lead and and the pixel capacitors of its both sides adjacency or the spacer portion between the public electrode or above-mentioned source electrode lead and and pixel capacitors or at least 1 spacer portion in the spacer portion between the public electrode of its both sides adjacency vertically directed.
11. liquid crystal indicator according to claim 10 is characterized in that it has control electrode of electric field, this electrode is provided with according to the mode that covers 1 edge part in above-mentioned source electrode lead or the above-mentioned grid lead at least.
12. the manufacture method of a liquid crystal indicator, wherein at the clamping liquid crystal layer and the opposite face side of a substrate in two relative substrates forms source electrode lead and the grid lead be rectangular setting, each point of crossing of corresponding above-mentioned source electrode lead and grid lead and the on-off element that is provided with, the pixel capacitors that is connected with this on-off element, and relative pixel capacitors with this relatively and the public electrode that forms along above-mentioned source electrode lead, above-mentioned liquid crystal layer at least above-mentioned source electrode lead and and the pixel capacitors of its both sides adjacency or the spacer portion between the public electrode vertically directed, this liquid crystal indicator has control electrode of electric field, and this control electrode of electric field is formed at above-mentioned another piece substrate on according to the mode of the edge part that covers 1 lead in above-mentioned source electrode lead or the above-mentioned grid lead at least;
It is characterized in that this method is included in when applying voltage on the control electrode of electric field, by ultraviolet ray to comprising the step that high molecular liquid crystal hardens.
13. a liquid crystal indicator is wherein at the clamping liquid crystal layer and the opposite face side of a substrate in two relative substrates forms each point of crossing of the source electrode lead be rectangular setting and grid lead, corresponding above-mentioned source electrode lead and grid lead and the on-off element that is provided with, the pixel capacitors that is connected with this on-off element and relative pixel capacitors with this are relative and the public electrode that forms along above-mentioned source electrode lead;
It is characterized in that, on above-mentioned another piece substrate, the electric field shielding electrode is being set with above-mentioned source electrode lead position overlapped place, if the width of above-mentioned source electrode lead is represented by Ws, above-mentioned electric field shielding electrode width is represented by Wbm, above-mentioned public electrode width is represented that by Wcom the spacing between above-mentioned two substrates is represented by d, supplies with the maximal value of the signal voltage amplitude of above-mentioned source electrode lead and is represented by Vmax, spacing between above-mentioned pixel capacitors and the public electrode is represented by s, then satisfies following relational expression:
Wbm 〉=Ws, and Wcom 〉=51n (Vmax)+5d-s-15.
14. liquid crystal indicator according to claim 13 is characterized in that, the electric field shielding electrode does not exceed the viewing area that is formed by public electrode and pixel capacitors.
15. a liquid crystal indicator is wherein at the clamping liquid crystal layer and the opposite face side of a substrate in two relative substrates forms each point of crossing of the source electrode lead be rectangular setting and grid lead, corresponding above-mentioned source electrode lead and grid lead and the on-off element that is provided with, the pixel capacitors that is connected with this on-off element and relative pixel capacitors with this are relative and the public electrode that forms along above-mentioned source electrode lead;
It is characterized in that, supply with the polarity of the picture signal of above-mentioned source electrode lead reverses in 1 frame at least repeatedly, on above-mentioned another piece substrate, the electric field shielding electrode is being set with source electrode lead position overlapped place, if the width of above-mentioned source electrode lead is represented by Ws, above-mentioned electric field shielding electrode width is represented by Wbm, above-mentioned public electrode width is represented by Wcom, spacing between above-mentioned two substrates is represented by d, supplying with the maximal value of the signal voltage amplitude of above-mentioned source electrode lead is represented by Vmax, spacing between above-mentioned pixel capacitors and the public electrode is represented by s, then satisfies following relational expression:
Wbm 〉=Ws, and Wcom 〉=51n (Vmax)+5d-s-17.
16. liquid crystal indicator according to claim 13 is characterized in that, the electric field shielding electrode is the black matrix that is formed by conductive material.
17. liquid crystal indicator according to claim 13 is characterized in that, the electric field shielding electrode is arranged on the black matrix, and the width of electric field shielding electrode is less than the width of black matrix.
18. liquid crystal indicator according to claim 13 is characterized in that, electric field shielding electrode and public electrode are electrically connected.
19. a liquid crystal indicator is wherein at the clamping liquid crystal layer and the opposite face side of a substrate in two relative substrates forms each point of crossing of the source electrode lead be rectangular setting and grid lead, corresponding above-mentioned source electrode lead and grid lead and the on-off element that is provided with, the pixel capacitors that is connected with this on-off element and relative pixel capacitors with this are relative and the public electrode that forms along above-mentioned source electrode lead;
It is characterized in that, on above-mentioned another piece substrate with above-mentioned source electrode lead and above-mentioned public electrode at least one a part of position overlapped place the electric field shielding electrode is set, above-mentioned electric field shielding electrode and above-mentioned public electrode are electrically connected by the electric conductivity distance piece.
20. liquid crystal indicator according to claim 19 is characterized in that, the electric conductivity distance piece is the projection with electric conductivity that is formed on any one substrate at least.
21. a liquid crystal indicator is wherein at the clamping liquid crystal layer and the opposite face side of a substrate in two relative substrates forms each point of crossing of the source electrode lead be rectangular setting and grid lead, corresponding above-mentioned source electrode lead and grid lead and the on-off element that is provided with, the pixel capacitors that is connected with this on-off element and relative pixel capacitors with this are relative and the public electrode that forms along above-mentioned source electrode lead;
It is characterized in that, on above-mentioned another piece substrate, forming projection with above-mentioned public electrode position overlapped place, forming the electric field shielding electrode with above-mentioned source electrode lead position overlapped place, the part of above-mentioned electric field shielding electrode is formed on the above-mentioned projection, and above-mentioned electric field shielding electrode and public electrode are electrically connected.
22. a liquid crystal indicator is wherein at the clamping liquid crystal layer and the opposite face side of a substrate in two relative substrates forms each point of crossing of the source electrode lead be rectangular setting and grid lead, corresponding above-mentioned source electrode lead and grid lead and the on-off element that is provided with, the pixel capacitors that is connected with this on-off element and relative pixel capacitors with this are relative and the public electrode that forms along above-mentioned source electrode lead;
It is characterized in that, if above-mentioned public electrode width is represented that by Wcom the spacing between above-mentioned two substrates is represented by d, supplies with the maximal value of the signal voltage amplitude of above-mentioned source electrode lead and is represented by Vmax, spacing between above-mentioned pixel capacitors and the public electrode is represented by s, then satisfies following relational expression:
Wcom≥51n(Vmax)+5d-s-12。
23. a liquid crystal indicator is wherein at the clamping liquid crystal layer and the opposite face side of a substrate in two relative substrates forms each point of crossing of the source electrode lead be rectangular setting and grid lead, corresponding above-mentioned source electrode lead and grid lead and the on-off element that is provided with, the pixel capacitors that is connected with this on-off element and relative pixel capacitors with this are relative and the public electrode that forms along above-mentioned source electrode lead;
It is characterized in that, the polarity that puts on the picture intelligence on the above-mentioned source electrode lead is reversed repeatedly in 1 frame at least, if above-mentioned public electrode width is represented by Wcom, spacing between above-mentioned two substrates is represented by d, supplying with the maximal value of the signal voltage amplitude of above-mentioned source electrode lead is represented by Vmax, spacing between above-mentioned pixel capacitors and the public electrode is represented by s, then satisfies following relational expression:
Wcom≥51n(Vmax)+5d-s-15。
CN00801254A 1999-07-19 2000-07-19 Liquid crystal display, method for driving same and method for manufacturing same Pending CN1316065A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP204150/1999 1999-07-19
JP20415099 1999-07-19

Publications (1)

Publication Number Publication Date
CN1316065A true CN1316065A (en) 2001-10-03

Family

ID=16485675

Family Applications (1)

Application Number Title Priority Date Filing Date
CN00801254A Pending CN1316065A (en) 1999-07-19 2000-07-19 Liquid crystal display, method for driving same and method for manufacturing same

Country Status (4)

Country Link
KR (1) KR20010072902A (en)
CN (1) CN1316065A (en)
TW (1) TW525008B (en)
WO (1) WO2001006310A1 (en)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102012574A (en) * 2009-09-04 2011-04-13 北京京东方光电科技有限公司 Manufacturing method of liquid crystal display panel and liquid crystal display substrate
CN102243405A (en) * 2010-05-13 2011-11-16 上海天马微电子有限公司 Liquid crystal display panel and manufacturing method thereof
CN101424852B (en) * 2007-10-29 2012-09-05 Nlt科技股份有限公司 Liquid crystal display device and driving method for the same
CN103278983A (en) * 2012-12-26 2013-09-04 上海中航光电子有限公司 LLS liquid crystal display and color membrane substrate thereof
CN104570458A (en) * 2014-12-30 2015-04-29 厦门天马微电子有限公司 Liquid-crystal display panel and liquid-crystal display device
CN105717712A (en) * 2014-12-03 2016-06-29 南京瀚宇彩欣科技有限责任公司 Blue phase liquid crystal display panel and manufacturing method thereof
CN106483724A (en) * 2015-08-28 2017-03-08 群创光电股份有限公司 Display device
CN107533264A (en) * 2015-05-13 2018-01-02 凸版印刷株式会社 Liquid crystal display device
CN111338122A (en) * 2020-03-25 2020-06-26 合肥京东方光电科技有限公司 Color film substrate, display panel and driving method thereof

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2975844B2 (en) * 1993-06-24 1999-11-10 三洋電機株式会社 Liquid crystal display
JP3054005B2 (en) * 1993-09-30 2000-06-19 シャープ株式会社 Liquid crystal display device and method of manufacturing the same
WO1997034191A1 (en) * 1996-03-14 1997-09-18 Citizen Watch Co., Ltd. Liquid crystal display device
JP3883244B2 (en) * 1997-01-23 2007-02-21 エルジー フィリップス エルシーディー カンパニー リミテッド Liquid crystal display
JPH1152420A (en) * 1997-08-06 1999-02-26 Hitachi Ltd Liquid crystal display device
JPH1184431A (en) * 1997-09-16 1999-03-26 Canon Inc Liquid crystal element and its production

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101424852B (en) * 2007-10-29 2012-09-05 Nlt科技股份有限公司 Liquid crystal display device and driving method for the same
CN102012574A (en) * 2009-09-04 2011-04-13 北京京东方光电科技有限公司 Manufacturing method of liquid crystal display panel and liquid crystal display substrate
CN102243405A (en) * 2010-05-13 2011-11-16 上海天马微电子有限公司 Liquid crystal display panel and manufacturing method thereof
CN102243405B (en) * 2010-05-13 2015-09-02 上海天马微电子有限公司 Display panels and manufacture method thereof
CN103278983A (en) * 2012-12-26 2013-09-04 上海中航光电子有限公司 LLS liquid crystal display and color membrane substrate thereof
CN103278983B (en) * 2012-12-26 2016-08-24 上海中航光电子有限公司 IPS liquid crystal display and color membrane substrates thereof
CN105717712A (en) * 2014-12-03 2016-06-29 南京瀚宇彩欣科技有限责任公司 Blue phase liquid crystal display panel and manufacturing method thereof
CN104570458A (en) * 2014-12-30 2015-04-29 厦门天马微电子有限公司 Liquid-crystal display panel and liquid-crystal display device
CN104570458B (en) * 2014-12-30 2017-10-24 厦门天马微电子有限公司 Liquid crystal display panel and liquid crystal display device
CN107533264A (en) * 2015-05-13 2018-01-02 凸版印刷株式会社 Liquid crystal display device
CN107533264B (en) * 2015-05-13 2020-10-02 凸版印刷株式会社 Liquid crystal display device having a plurality of pixel electrodes
CN106483724A (en) * 2015-08-28 2017-03-08 群创光电股份有限公司 Display device
CN111338122A (en) * 2020-03-25 2020-06-26 合肥京东方光电科技有限公司 Color film substrate, display panel and driving method thereof

Also Published As

Publication number Publication date
TW525008B (en) 2003-03-21
KR20010072902A (en) 2001-07-31
WO2001006310A1 (en) 2001-01-25

Similar Documents

Publication Publication Date Title
CN1178099C (en) LCD device
CN1198252C (en) Display device and driving method thereof, and display pattern evaluation for sub-element of picture
CN1235082C (en) Liquid crystal display with large visual angle character
CN1221845C (en) Active-matrix addressing LCD device using laterial electric field
CN1169016C (en) Active matrix type liquid crystal display
CN1099046C (en) Active matrix type liquid crystal display device
CN1873490A (en) Liquid crystal display device
CN101055385A (en) Liquid crystal display
CN1773601A (en) Display device and driving method
CN1055769C (en) Active matrix type liquid crystal display device and its driving method
CN1811535A (en) Liquid crystal display
CN1648748A (en) Display device
CN1892391A (en) Liquid crystal display and display method
CN1601361A (en) Liquid crystal display
CN1403855A (en) Liquid crystal display with high-response IPS display mode
CN1727971A (en) Liquid crystal display device and method of preventing image sticking thereon
CN1482593A (en) Liquid crystal display
CN1420383A (en) Liquid crystal display
CN1432855A (en) Liquid crystal display device and image display unit
CN101053009A (en) Liquid crystal display apparatus and method for driving the same
CN1691102A (en) Apparatus and method for driving a display device
CN1459657A (en) Plane internal switch mode active matrix liquid crystal display device and mfg. method thereof
CN1928674A (en) Liquid crystal display
CN1595270A (en) Electro-optical device and its manufacturing method
CN1316065A (en) Liquid crystal display, method for driving same and method for manufacturing same

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
C02 Deemed withdrawal of patent application after publication (patent law 2001)
WD01 Invention patent application deemed withdrawn after publication