CN1143167C

CN1143167C - Liquid crystal display

Info

Publication number: CN1143167C
Application number: CNB981193234A
Authority: CN
Inventors: 山口雅彦
Original assignee: Alps Electric Co Ltd
Current assignee: Alps Alpine Co Ltd
Priority date: 1997-09-19
Filing date: 1998-09-11
Publication date: 2004-03-24
Anticipated expiration: 2018-09-11
Also published as: KR100296161B1; CN1220409A; TW493098B; KR19990029851A

Abstract

The present invention provides a liquid crystal display device permitting to widen a field of view without decrease in numerical aperture. A source line 15 and a gate line 16 are arranged intersecting at right angles and areas divided by these wiring to form picture elements 17a, 17b. A thin film transistor 19 is provided in the neighborhood of each intersection of the source line 15 and the gate line 16, and an oriented electrode 18 composed of a part of the gate line 16 extended along the source line 15 is provided for each picture element separately between the adjacent picture elements arrayed in the direction of the source line 15. And, these oriented electrodes 18 are juxtaposed along and on both sides of every other source line 15 between adjacent two picture elements.

Description

Liquid crystal indicator

Technical field

The present invention relates to the angle of visibility interdependence little, be not subjected to direction of observation to influence, have the liquid crystal indicator of good identification.

Background technology

Usually, twisted nematic (TN) formula liquid crystal indicator exists angle of visibility interdependence problem.Figure 25 represents the general angle of visibility interdependence of TN formula liquid crystal indicator.Among Figure 25, represented that by the curve area surrounded contrast (CR) is the scope more than 10.As shown in the drawing, TN formula liquid crystal indicator, the identification of seeing from left and right directions is good, but poor from above-below direction, the identification especially seen from the top.

Based on this problem, the scheme of various expansion liquid crystal indicator angle of visibility structures has been proposed in recent years.

Wherein a kind of is cutting apart of the orientation structure of pixel unit.In this cutting apart of orientation structure, when each pixel is applied voltage, have liquid crystal molecule and erect the different zone of direction.For example,, on the oriented film of pixel divided into two parts, implement different directional process respectively, can realize this structure a pixel separated into two parts.But for fine pixel, implementing different directional process in each cut zone is pretty troublesome operation, and its complex procedures and yield rate are low.

In order to realize wide view angle, the phase-contrast film that also can adopt handle to have the angle function of broadening one's vision is attached to the method on the liquid crystal display.But this film price is very high, so adopt this method to raise the cost.

A kind of technology of the angle of broadening one's vision has also been proposed in the prior art, this technology is that the common electrode of substrate-side is located at the pixel capacitors side being located in opposite directions, liquid crystal molecule is applied the electric field that is parallel to substrate, in being parallel to the face of substrate, drive liquid crystal molecule (In-Plane SwitchingIPS).But, this IPS structure, the electrode configuration in the liquid crystal display is complicated, and aperture opening ratio is low.

In order to realize wide view angle, a kind of liquid crystal indicator that surrounds electrode that has has also been proposed, above-mentioned encirclement electrode is meant the directed control electrode that is provided with in the mode of surrounding pixel capacitors four limits.Figure 23 and Figure 24 represent to have a pixel design of the liquid crystal indicator that surrounds electrode.As shown in figure 23, door line 201 (sweep trace) and source line 202 (signal wire) are arranged in a crossed manner, are provided with thin film transistor (TFT) 203 near intersection point.In the zone of dividing by these lines 201, source line 202, be provided with the rectangular pixel electrode 204 that is connected with the drain electrode of thin film transistor (TFT) 203, directed control electrode 205 surrounds four limits of pixel capacitors 204.In addition, along the cross-sectional configuration of the XXIV-XXIV line of Figure 23, as shown in figure 24, pixel capacitors 204, directed control electrode 205 are arranged on a side the substrate 206 by dielectric film 207 respectively, clipping on liquid crystal layer 208 and this substrate 206 the opposing party's substrate 209 in opposite directions, be provided with electrode 210 in opposite directions.In opposite directions on the electrode 210, as shown in figure 23, form the window 211 of X font along the diagonal line of pixel at this.

In this liquid crystal indicator, as shown in figure 24, clip liquid crystal layer in opposite directions pixel capacitors 204 and produce electric field between the electrode 210 in opposite directions, between pixel capacitors on side's substrate and directed control electrode 205, also produce electric field, the vergence direction of liquid crystal molecule is by these electric field controls.Because directed control electrode 205 surrounds four limits of pixel capacitors 204, so near the liquid crystal molecule pixel capacitors 204 each limit towards the directed control electrode 205 along its limit configuration, tilts to direction of an electric field (direction shown in the arrow among Figure 23) respectively.That is, in a pixel, be the boundary with 2 diagonal line, can form four different zones of liquid crystal aligning direction, asymmetric contrast equalization in pixel that each orientation direction forms is so the angle of broadening one's vision.

But, have in the liquid crystal indicator that surrounds electrode above-mentioned, in pixel, near the boundary in four different zones of liquid crystal aligning direction, produce directed disorderly (hereinafter referred to as discrete) of liquid crystal molecule, light leak may take place in this part.For this reason, the black mask of X font etc. is set in substrate-side in opposite directions, in case leak-stopping light.And so produced the low problem of aperture opening ratio.Especially it is totally unfavorable in pixel central authorities this black mask being set.That is, this method is by surrounding the electrode angle of broadening one's vision, but the problem that can't avoid aperture opening ratio to reduce.

Summary of the invention

The present invention makes in view of the above problems, and its purpose is to provide a kind of and does not reduce aperture opening ratio, the liquid crystal indicator at the angle of broadening one's vision.

To achieve these goals, liquid crystal indicator of the present invention is characterised in that: liquid crystal layer is located between a pair of substrate, among this a pair of substrate, on the forward surface of side's substrate, some signal line and some sweep traces are set mutually orthogonal, the zone of being divided by these lines is a pixel, near each intersection point of signal wire and sweep trace, thin film transistor (TFT) is set, simultaneously, with pixel capacitors that thin film transistor (TFT) in above-mentioned each pixel is connected between, oriented electrodes applies electric field to above-mentioned liquid crystal layer, and in two adjacent pixels, this oriented electrodes clips signal wire and along this signal wire and be located at this signal wire both sides every a ground.

In this liquid crystal indicator, when on side's substrate, except pixel capacitors, also oriented electrodes being set, clip liquid crystal layer pixel capacitors in opposite directions and the electric field that produces between the electrode in opposite directions, quilt attracts with the oriented electrodes that pixel capacitors is located on the same substrate, and electric field is oblique towards the oriented electrodes inclination.

In the liquid crystal indicator of the present invention, in two adjacent pixels, oriented electrodes clips signal wire every a ground, and along this signal wire and be located at the both sides of this signal wire, so in these two pixels, electric field is towards oriented electrodes, i.e. the signal line side inclined in opposite directions respectively of two pixel central authorities, corresponding with the electric field that tilts to all directions, liquid crystal molecules tilt erects.In addition, the relation of electric field inclined in opposite directions in adjacent two pixels does not have and sets the same in adjacent two pixels of the signal wire of electrode with clipping.

Like this,, clipped adjacent two pixel equalizations of signal wire, can be enlarged the angle of visibility of integral body by the structure of this liquid crystal indicator by the asymmetric contrast that the orientation direction of liquid crystal produces.

In addition, liquid crystal indicator of the present invention, do not resemble be provided with produce in pixel central authorities the available liquid crystal display device of surrounding electrode discrete, even produce discrete also only being created in along the signal wire position between adjacent image point.And this position is the position that black mask is set in common liquid crystal indicator, so dispersing that the present invention's structure causes has no adverse effects to aperture opening ratio.

Therefore, according to liquid crystal indicator of the present invention, can not reduce aperture opening ratio and the angle of broadening one's vision.

As the form of above-mentioned oriented electrodes itself, can take following various.

For example, also oriented electrodes and signal wire or sweep trace can be separated independently being provided with, in signal wire several pixels side by side, the bearing of trend of this oriented electrodes along signal wire be prolonged.

In addition, also oriented electrodes can be set individually, but constitute along the part that each signal wire stretches out by the part of each sweep trace.In order to make not short circuit between the sweep trace, use along the signal wire direction and isolate between neighboring pixels side by side.

The former situation because oriented electrodes and signal wire or sweep trace are separated setting independently, so this oriented electrodes also can be used as ground wire usefulness, can apply certain current potentials such as earthing potential always.In addition, also can not apply earthing potential, and apply negative potential.Which kind of situation no matter, owing in this structure, produce potential difference (PD) between pixel capacitors and the oriented electrodes, so, on one side can make in pixel capacitors and the electric field that produces between the electrode in opposite directions to tilt towards oriented electrodes.

Latter's situation, because oriented electrodes and sweep trace form as one, so, as long as in existing liquid crystal indicator, change the wiring shape of sweep trace, compared with prior art,, oriented electrodes do not make the manufacturing course complexity because of being set.

In addition, also oriented electrodes can be arranged to zigzag along signal wire and sweep trace.

When making this structure, not only clip two adjacent pixels of signal wire, and in clipping two adjacent pixels of sweep trace, the vergence direction of electric field also is opposite, the vergence direction of liquid crystal molecule is also opposite.Therefore, asymmetric contrast is by adjacent two pixel equalizations, with the above-mentioned effect that similarly produces the angle of broadening one's vision.Therefore, the broaden one's vision effect at angle of integral body is remarkable.In addition, clipping between two adjacent pixels of sweep trace, what produce along the position of sweep trace is discrete, because the setting of black mask and aperture opening ratio is had no adverse effects.

In addition, also the capacity electrode that is connected with above-mentioned pixel capacitors can be provided with in opposite directions by dielectric film and oriented electrodes, constitute the capacity portion of accumulating by these capacity electrodes, dielectric film, oriented electrodes.

For liquid crystal indicator, it is indispensable keeping the capacity portion of accumulating of pixel capacitors electric charge.In the above-mentioned structure, for example, this capacity electrode and signal wire constitute with layer, and oriented electrodes and sweep trace constitute with layer.Therefore, form when accumulating capacity portion and needn't adopt new layer, manufacturing process is uncomplicated.Like this, according to above-mentioned structure,, just can easily form the capacity portion of accumulating as long as carry out the change of simple mask artwork.

In addition, with above-mentioned side's substrate the opposing party's substrate in opposite directions on electrode in opposite directions on, also can window be set along the edge part that the above-mentioned oriented electrodes that is positioned at above-mentioned pixel is provided with side and opposition side.

In the liquid crystal indicator of the present invention, pixel capacitors and in opposite directions between electrode or the potential difference (PD) between pixel capacitors and oriented electrodes, because of the relative position relation of these electrodes, the case of bending of electric field changes, the heeling condition of liquid crystal molecule also changes.By regulating the heeling condition of this liquid crystal molecule, can control the angle of visibility interdependence of contrast.Therefore, as mentioned above, among electrode in opposite directions, when oriented electrodes is provided with the edge part formation window of side and opposition side, in the end away from oriented electrodes one side of pixel capacitors, there is not electrode in opposite directions above it, so, pixel capacitors and the electric field that produces between the electrode are in opposite directions compared when not establishing window, and be more oblique to the oriented electrodes inclination.Like this, on the electrode window is being set in opposite directions, and, can changing the heeling condition of liquid crystal molecule, the angle of visibility interdependence of may command contrast the size optimization of this window.

Another liquid crystal indicator of the present invention.It is characterized in that, liquid crystal layer is located between a pair of substrate, among this a pair of substrate, on a side substrate forward surface, some signal line and some sweep traces are set mutually orthogonal, and the zone of being divided by these lines forms two pixels of isolating, and near each intersection point of signal wire and sweep trace thin film transistor (TFT) is set, while is in two pixels of the isolation adjacent along signal wire, and each pixel corresponding scanning line disposes symmetrically with respect to the shielding wire between pixel.

" shielding wire " described in this instructions, in being meant that the present invention constructs, the region memory of being divided by signal wire and sweep trace is at two pixels, but do not have line between these pixels, so, the center line (imaginary line) in the zone that has a common boundary as each pixel is called shielding wire.

In this liquid crystal indicator, pixel capacitors is about 1 to 10V current potential, do not apply sweep trace under the scanning voltage state is current potential about 6V, produces very big potential difference (PD) between pixel capacitors and sweep trace.Therefore, be scanned line and attract clipping liquid crystal layer pixel capacitors and the electric field that produces between the electrode in opposite directions in opposite directions, electric field tilts towards scan line side.In addition, when on sweep trace, having applied scanning voltage, though the potential difference (PD) between pixel capacitors and the sweep trace diminish, scanning voltage with impulse form moment apply, so to the not influence of orientation direction of liquid crystal.

In another liquid crystal indicator of the present invention, in two pixels that are adjacent to isolate along signal wire, and each pixel corresponding scanning line is the center balanced configuration with the shielding wire between pixel, so, electric field is towards the scan line side difference inclined in opposite directions of each pixel, with the electric field that tilts to all directions correspondingly, liquid crystal molecules tilt erects.

Because this effect by the asymmetric contrast that the orientation direction of liquid crystal produces, is clipped adjacent two pixel equalizations of signal wire, enlarges the angle of visibility of integral body.

In another liquid crystal indicator of the present invention, do not resemble to be provided with and produce the available liquid crystal display device of surrounding electrode discretely in pixel central authorities, discretely only be created in yet along the position of shielding wire between adjacent image point or signal wire even produce.And this position is the position that black mask is set in common liquid crystal indicator, so dispersing that structure of the present invention produces has no adverse effects to aperture opening ratio.

In addition, the present invention needn't be provided with oriented electrodes especially, can obtain above-mentioned effect with open-and-shut Wiring construction.

In addition, also can with above-mentioned side's substrate another substrate in opposite directions on electrode in opposite directions is set, along this in opposite directions the part of the above-mentioned shielding wire of electrode window is set.

In this liquid crystal indicator, pixel capacitors and in opposite directions between electrode or the potential difference (PD) between pixel capacitors and oriented electrodes, because of the relative position relation of these electrodes, the case of bending of electric field changes, the heeling condition of liquid crystal molecule also changes.By regulating the heeling condition of this liquid crystal molecule, can control the angle of visibility interdependence of contrast.Therefore, as mentioned above, in a pixel, along the above-mentioned shielding wire that is positioned at the sweep trace opposition side, when on electrode in opposite directions, forming window, at the shielding wire side end of pixel capacitors, directly over it, there is not electrode in opposite directions, so pixel capacitors and the electric field that produces between the electrode are in opposite directions compared when not establishing window, more tilt to scan line side.Like this, on the electrode window is being set in opposite directions, and, can changing the heeling condition of liquid crystal molecule, the angle of visibility interdependence of may command contrast the size optimization of this window.

Description of drawings

Fig. 1 represents the planimetric map of the pixel general structure in the first embodiment of the invention liquid crystal indicator.

Fig. 2 be liquid crystal indicator shown in Figure 1 want portion's enlarged drawing.

Fig. 3 is the sectional view along the III-III line of Fig. 2.

Fig. 4 is the sectional view along the IV-IV line of Fig. 2.

Fig. 5 is in the expression liquid crystal indicator shown in Figure 1, changes the planimetric map of oriented electrodes position example.

Fig. 6 is the planimetric map of the pixel design in the expression second embodiment of the invention liquid crystal indicator.

Fig. 7 is the sectional view along the VII-VII line of Fig. 6.

Fig. 8 is the planimetric map of the pixel design in the expression third embodiment of the invention liquid crystal indicator.

Fig. 9 is the sectional view along the IX-IX line of Fig. 8.

Figure 10 is in the expression liquid crystal indicator shown in Figure 8, changes the planimetric map of oriented electrodes form example.

Figure 11 is the planimetric map of the whole general structure of pixel in the expression fourth embodiment of the invention liquid crystal indicator.

Figure 12 be liquid crystal indicator shown in Figure 11 want portion's enlarged drawing.

Figure 13 is the sectional view along the XIII-XIII line of Figure 12.

Figure 14 is the sectional view along the XIV-XIV line of Figure 12.

Figure 15 is the planimetric map of the pixel design in the expression fifth embodiment of the invention liquid crystal indicator.

Figure 16 represents it is the planimetric map of the whole general structure of pixel in the sixth embodiment of the invention liquid crystal indicator.

Figure 17 be liquid crystal indicator shown in Figure 16 want portion's enlarged drawing.

Figure 18 is the sectional view along the XVIII-XVIII line of Figure 17.

Figure 19 is the sectional view along the XIX-XIX line of Figure 17.

Figure 20 is the planimetric map of the pixel design in the expression seventh embodiment of the invention liquid crystal indicator.

Figure 21 is the sectional view along the XXI-XXI line of Figure 20.

Figure 22 is in the liquid crystal indicator of expression seventh embodiment of the invention shown in Figure 20, changes the planimetric map of electrode shape example in opposite directions.

Figure 23 is the planimetric map that the pixel design of the available liquid crystal display device of surrounding electrode has been adopted in expression.

Figure 24 is the sectional view along the XXIV-XXIV line of Figure 23.

Figure 25 is the figure of the general angle of visibility interdependence of expression TN formula liquid crystal indicator.

Embodiment

Below, referring to figs. 1 through Fig. 4 the first embodiment of the present invention is described.

Fig. 1 represents the planimetric map of the pixel design in the present embodiment liquid crystal indicator.Fig. 2 be liquid crystal indicator shown in Figure 1 want portion's enlarged drawing.Fig. 3 is the sectional view that dissects expression at the film crystal tube portion.Fig. 4 is the sectional view that partly dissects expression in pixel capacitors.

In the present embodiment, thin film transistor (TFT) is for staggered, and oriented electrodes and door line are constituted with layer, and this oriented electrodes applies electric field to the liquid crystal layer between itself and the pixel capacitors.

Fig. 1 is the figure that is used to illustrate present embodiment liquid crystal indicator feature.In this liquid crystal indicator, be provided with the some source lines 15 (signal wire) and the some door lines 16 (sweep trace) of mutual orthogonal, the zone of being divided by these

lines

15,16 forms pixel 17.Near each intersection point of source line 15 and door line 16, be provided with thin film transistor (TFT) (this is not shown), the part of each line 16 is stretched out along each source line 15, constitute oriented electrodes 18.Neighboring pixels 17 is spaced apart side by side along source line 15 directions for these oriented electrodes 18 quilts, respectively is provided with one at each pixel 17.In adjacent two pixels 17, this oriented electrodes 18 every a root line 15 ground along this source line 15 and be located at the both sides of this source line 15.In addition, and the part that is located at the oriented electrodes 18 of both sides stagger mutually in direction (longitudinal direction among Fig. 1) along source line 15.

Fig. 2 amplifies the part of presentation graphs 1.As shown in Figure 2, a source line 15 and the 16 mutual orthogonal settings of door line, the zone of being divided by these

lines

15,16 forms OBL pixel 17, is long side directions along the direction of source line 15, is short side directions along the direction of a line 16.Near each intersection point of source line 15 and door line 16, be provided with thin film transistor (TFT) 19, the source electrode 20 of thin film transistor (TFT) 19, gate electrode 21 stretch out from source line 15, door line 16 respectively.Pixel capacitors 24 is connected with the drain electrode 22 of thin film transistor (TFT) 19 by contact hole 23.In each pixel 17, be provided with the oriented electrodes 18 that the part of each line 16 is stretched out along source line 15.

Clip two adjacent pixels 17 of a root line 15, for example among four pixels among Fig. 2, among the upper left pixel 17a, oriented electrodes 18 is located at right side in this pixel, upper right pixel 17b, oriented electrodes 18 is located in this pixel the left side, clips the opposition side that oriented electrodes 18 among adjacent two pixel 17a, the 17b of a root line 15 is configured in each

pixel

17a, 17b respectively.Like this, in

adjacent image point

17a, 17b, oriented electrodes 18 is configured in opposition side.This pass ties up in lower-left pixel among Fig. 2 and the bottom right pixel too, in addition, along source line 15 two pixels side by side, in for example upper left pixel and the lower-left pixel too.

Fig. 3 represents the cross-sectional configuration of present embodiment liquid crystal indicator.This liquid crystal indicator on the surface of first substrate 25, is provided with thin film transistor (TFT) 19, pixel capacitors 24, oriented electrodes 18 as shown in Figure 3.On the surface of second substrate 26, be provided with color filter 27, black mask 28 and electrode 29 in opposite directions.Between this a pair of substrate 25,26, be provided with liquid crystal layer 41.Here the liquid crystal of Cai Yonging can be to have negative electricity Jie to lead anisotropic liquid crystal, also can be to have positive electricity Jie to lead anisotropic liquid crystal.Not shown oriented film.

In the part of thin film transistor (TFT) 19, on first substrate 25, form the gate electrode 21 of deriving from door line 16, and form cover this gate electrode 21 by SiO ₂, SiN _xDeng the gate insulation film 30 that constitutes.Be positioned at gate electrode 21 tops gate insulation film 30 above, be provided with the semiconductor layer 31 that constitutes by amorphous silicon (a-Si), on this semiconductor layer 31, n is set ⁺Type a-Si layer 32 forms drain electrode 22 that is made of electric conductors such as aluminium and the source electrode 20 of deriving from source line 15 more thereon.So form to cover these drain electrodes 22, source electrode 20 by SiO ₂Or SiN _xDeng the passivating film 33 that constitutes, and, on drain electrode 22, form the contact hole 23 that connects this passivating film 33, be formed on the passivating film 33 by this contact hole 23 and the pixel capacitors 24 that constitutes by transparent conductivity materials such as ITO that drain electrode 22 is electrically connected.In the side of gate electrode 21, be provided with and the oriented electrodes 18 of this gate electrode 21 with layer.

In the liquid crystal indicator of present embodiment, clip liquid crystal layer 41 in opposite directions pixel capacitors 24 and apply electric field between the electrode 29 in opposite directions, drive liquid crystal molecule.But, usually, pixel capacitors 24 is about 1 to 10V current potential, does not apply the state of scanning voltage that on the door line 16 by oriented electrodes 18 oriented electrodes 18 is the current potential about 6V, so, between pixel capacitors 24 and oriented electrodes 18, produce big potential difference (PD).As a result, as shown in Figure 4, at pixel capacitors 24 and the electric field E that produces between the electrode 29 in opposite directions, be arranged on pixel capacitors 24 same substrates on oriented electrodes 18 attract, electric field E is oblique to oriented electrodes 18 inclinations.At this moment, left and right directions is the short side direction of pixel capacitors 24 among Fig. 4, so electric field E tilts especially easily.In addition, when having applied scanning voltage on door line 16, the potential difference (PD) between pixel capacitors 24 and the oriented electrodes 18 reduces, but scanning voltage with impulse form moment apply, to the not influence of orientation direction of liquid crystal.

Clip in two adjacent pixels 17 of a source line 15, pixel 17 interior orientation electrodes 18 that the position is set is opposite each other, so, the vergence direction of electric field E is also opposite, arrow E is represented vergence direction among Fig. 1, as shown by arrow E, corresponding with the electric field E that tilts towards all directions, liquid crystal molecules tilt erects.So the asymmetrical contrast that produces because of the liquid crystal aligning direction is clipped two adjacent pixel 17 equalizations of a root line 15, the structure of this liquid crystal indicator, the integral body angle of can broadening one's vision.In addition, in the present embodiment, as can be seen from Figure 1, along in source line 15 directions two pixels 17 side by side, electric field E tilts in the opposite direction, so contrast has more strengthened the effect at the angle of broadening one's vision also by these two pixel 17 equalizations.

In the liquid crystal indicator of present embodiment, do not resemble be provided with produce in pixel central authorities the available liquid crystal display device of surrounding electrode discrete, even produce discrete also just in (for example position shown in the label D among Fig. 4) generations of 17 of adjacent image points along near position source line 15.And the active line 15 in this position passes through, and this position is the position that black mask 28 is set in common liquid crystal indicator, so in the structure of present embodiment, dispersing has no adverse effects to aperture opening ratio.

Therefore, according to the liquid crystal indicator of present embodiment, have and do not reduce aperture opening ratio and the effect at the angle of broadening one's vision.

In addition, in the liquid crystal indicator of present embodiment, each oriented electrodes 18 forms as one with door line 16, so, as long as some design alterations are done in the wiring to the door line in the available liquid crystal display device, compared with prior art,, oriented electrodes 18 do not make manufacturing process's complexity because of being set.

In addition, in the present embodiment, as shown in Figure 1, and in both sides and set part to electrode 18, along different in the source line 15 directions pixel 17 side by side, the result, along in source line 15 two pixels 17 side by side, asymmetrical contrast averages out.But, if do not require this effect, then also can be as shown in Figure 5, with both sides and set to the part linearity of electrode 18 be configured in along in the source line 15 directions pixel 17 side by side.In this structure, contrast is clipped two adjacent pixel 17 equalizations of source line 15, can improve the angle of visibility of liquid crystal indicator integral body.

Below, with reference to Fig. 6, Fig. 7 the second embodiment of the present invention is described.

Fig. 6 is the planimetric map of a pixel design of expression liquid crystal indicator of the present invention.Fig. 7 is the sectional view that partly dissects in pixel capacitors.

The liquid crystal indicator of present embodiment and the first embodiment difference be, is provided with the capacity electrode, and with the same oriented electrodes double as of first embodiment be an electrode accumulating capacity portion, constitute the capacity portion of accumulating by them.Among Fig. 6, Fig. 7, annotate with same numeral with part common among Fig. 1 to Fig. 4, its detailed description is omitted.

In the liquid crystal indicator of present embodiment, as shown in Figure 6 and Figure 7, the part of door line 16 is stretched out along source line 15 and form oriented electrodes 18.Above this oriented electrodes 18, the capacity electrode 34 of setting and the same shapes of this oriented electrodes 18 cardinal principles, this capacity electrode 34 is by gate insulation film 30 and source line 15 layer formation together.Form the passivating film 33 that covers this capacity electrode 34 and be positioned at the source line 15 of its side, form the contact hole 35 that connects this passivating film 33 on capacity electrode 34, capacity electrode 34 and pixel capacitors 24 are electrically connected by this contact hole 35.Therefore, constitute the capacity portion 36 of accumulating by these capacity electrodes 34, gate insulation film 30, oriented electrodes 18.

For liquid crystal indicator, before arriving next scanning behind the door line sweep, it is indispensable keeping the capacity portion of accumulating of pixel capacitors electric charge.In the present embodiment, this is accumulated capacity portion 36 and is made of capacity electrode 34, gate insulation film 30, oriented electrodes 18.Among the electrode of formation capacity, capacity electrode 34 constitutes with source line 15 layer together, and oriented electrodes 18 constitutes with door line 16 layer together.Therefore, form when accumulating capacity portion 36 and needn't adopt new layer, manufacturing process is uncomplicated.Like this, according to the liquid crystal indicator of present embodiment, except have with first embodiment same do not reduce aperture opening ratio, outside the effect at the angle of broadening one's vision,, just can easily form the capacity portion of accumulating as long as carry out the change of simple mask artwork.

Below, with reference to Fig. 8, Fig. 9 the third embodiment of the present invention is described.

Fig. 8 is the planimetric map of expression present embodiment liquid crystal indicator pixel design.Fig. 9 is the sectional view that partly dissects in pixel capacitors.

In the liquid crystal indicator of present embodiment, the structure of first substrate-side and first embodiment are identical, and it is different with first embodiment that the window this point only is set on the electrode in opposite directions of second substrate-side.Among Fig. 8, Fig. 9, annotate with same numeral with part identical among Fig. 1 to Fig. 4, its detailed description is omitted.

In the liquid crystal indicator of the present invention, pixel capacitors and in opposite directions between electrode or the potential difference (PD) between pixel capacitors and oriented electrodes, because of the relative position relation of these electrodes, the case of bending of its electric field changes, the heeling condition of liquid crystal molecule also changes.By regulating the heeling condition of this liquid crystal molecule, can control the angle of visibility interdependence of contrast.At this moment, only use the structure of first embodiment, the degree of tilt of liquid crystal molecule is not enough, if will strengthen degree of tilt, then as Fig. 8 and structure embodiment illustrated in fig. 9, with pixel capacitors 24 electrode in opposite directions 29 in opposite directions on formation window 37 get final product.This window 37 is formed on the top of pixel capacitors 24 and along the part on the limit that is positioned at oriented electrodes 18 opposition sides.

When on electrode 29 in opposite directions, forming such window 37, as shown in Figure 9, end in pixel capacitors 24 away from oriented electrodes 18 1 sides, there is not electrode 29 in opposite directions above it, so, pixel capacitors 24 is compared with the situation of not establishing window (the electric field E among Fig. 4) with the electric field E ' that produces between the electrode 29 in opposite directions, more towards oriented electrodes 18 inclinations.Like this, on the electrode 29 window 37 is being set in opposite directions, and, can changing the heeling condition of liquid crystal molecule, the angle of visibility interdependence of may command contrast the size optimization of this window 37.

In addition, also can not resemble shown in Figure 8ly, all in the pixels whole electrode in opposite directions 29 is being set, but as shown in Figure 10, the 29a of cutting apart of electrode in opposite directions is being set, in each pixel cut apart source line 15 portions cuts of electrode 29a in opposite directions along this.

Below, with reference to Figure 11 to Figure 14 the fourth embodiment of the present invention is described.

Figure 11 is the planimetric map of the pixel design in the expression present embodiment liquid crystal indicator.Figure 12 be liquid crystal indicator shown in Figure 11 want portion's enlarged drawing.Figure 13 is the sectional view that dissects expression at the film crystal tube portion.Figure 14 is the sectional view that partly dissects expression in pixel capacitors.

The present embodiment liquid crystal indicator and the first embodiment difference are that oriented electrodes is forming as one with layer with the door line among first embodiment, and in the present embodiment, oriented electrodes and door line or source line independently is provided with dividually.Among Figure 11 to Figure 14, the part identical with Fig. 1 to Fig. 4 annotated with same numeral, and its detailed description is omitted.

Figure 11 is the figure of explanation present embodiment liquid crystal indicator feature.In the liquid crystal indicator of present embodiment, be provided with the source line 15 and the door line 16 of mutual orthogonal, the zone of being divided by these

lines

15,16 forms pixel 17.Near each intersection point of source line 15 and door line 16, be provided with thin film transistor (TFT) (this is not shown), with source line 15 or the oriented electrodes 38 that is provided with dividually of door line 16 in clipping two adjacent pixels 17 of a root line 15, along this source line 15 and be located at the both sides of this source line 15.In addition, this oriented electrodes 38 is extended along the direction length length that extends of source line 15 along in direction several pixels 17 side by side of source line 15.

Figure 12 is the partial enlarged drawing of Figure 11.As shown in figure 12, the zone of being divided by source line 15 and door line 16 forms rectangular pixel, and its long limit is the bearing of trend of source line 15, and its minor face is the bearing of trend of a line 16.Near each intersection point of source line 15 and door line 16, be provided with thin film transistor (TFT) 19, pixel capacitors 24 is connected with the drain electrode 22 of thin film transistor (TFT) 19.

Clip in two adjacent pixels 17 of a root line 15, for example in Figure 12 among the pixel 17a in left side, oriented electrodes 38 is located at the left side among this pixel 17a, and in the pixel 17b on right side, oriented electrodes 38 is located at the right side among this pixel 17b.That is, the oriented electrodes 38 in clipping two adjacent pixels 17 of a root line 15 is along each opposite side configuration of these pixels 17.

As shown in figure 13, in this liquid crystal indicator, on the surface of first substrate 25, be provided with the oriented electrodes 38 that constitutes by electric conductors such as aluminium, be provided with cover this oriented electrodes 38 by SiO ₂, SiN _xDeng the dielectric film 39 that constitutes, the fall staggered thin film transistor (TFT) 19 identical with first embodiment is set on this dielectric film 39.The gate electrode 21 of this thin film transistor (TFT) 19 overlaps the top of oriented electrodes 38.The structure of second substrate, 26 sides is identical with first embodiment, is provided with liquid crystal layer 41 at this 25,26 of a pair of substrate.

The liquid crystal indicator of present embodiment, different with first embodiment, be provided with oriented electrodes 38 and door line 16 are independent dividually, so, this oriented electrodes 38 for example is also used as ground wire, can apply the certain potentials of earthing potential etc. always.In addition, also can not apply earthing potential, and apply negative potential.Which kind of situation no matter, this is configured between pixel capacitors 24 and the oriented electrodes 38 and produces potential difference (PD), as shown in figure 14, the oriented electrodes 38 that electric field E quilt and the pixel capacitors 24 that produces between pixel capacitors 24 and oriented electrodes 38 is located on the same substrate attracts, and electric field E is oblique towards oriented electrodes 38 inclinations.

Clip in two adjacent pixels 17 of a root line 15, oriented electrodes 38 that the position is set is opposite each other, so the vergence direction of its electric field E is also opposite, arrow E is represented vergence direction among Figure 11.As shown by arrow E, liquid crystal molecule correspondingly tilts to erect with the electric field E that tilts towards all directions.So the asymmetrical contrast that produces because of the liquid crystal aligning direction is clipped two adjacent pixel 17 equalizations of a root line 15, the structure of this liquid crystal indicator, the angle of can integral body broadening one's vision.In addition, in the present embodiment, producing discrete position is 17 positions along source line 15 of adjacent image point (position shown in the label D among Figure 14) that do not influence aperture opening ratio.

Therefore, the liquid crystal indicator of present embodiment also has and does not reduce aperture opening ratio and the effect at the angle of can broadening one's vision.

Below, with reference to Figure 15 the fifth embodiment of the present invention is described.

Figure 15 is the planimetric map of the pixel design of expression present embodiment liquid crystal indicator.In the liquid crystal indicator of present embodiment, oriented electrodes and door line or source line independently are provided with dividually.Its cross-sectional configuration and the 4th embodiment are same, but the planar configuration difference.With the linearly configuration of oriented electrodes, and in the present embodiment oriented electrodes indentation is disposed among the 4th embodiment.Among Figure 15, the part identical with Figure 12 annotated with same numeral, and its explanation is omitted.

In this liquid crystal indicator, as shown in figure 15, oriented electrodes 40 is formed on the lower floor of a line 16, in a root line 15

several pixels

17a, 17b side by side, forms zigzag.

Specifically, among four pixels shown in Figure 15, for the pixel 17a of left-hand line, in the pixel of upside, oriented electrodes 40 is by the below of the gate electrode 21 of the thin film transistor (TFT) 19 of this pixel, along the source line 15 that is connected with this thin film transistor (TFT) 19 (the source line in left side in this pixel) configuration; In the pixel of downside, oriented electrodes 40 is in the upside bending of this pixel, and the source line 15 (the source line on right side in this pixel) that is connected along the pixel thin film transistor (TFT) 19 with the right neighbour of this pixel disposes.Pixel 17b for right-hand column, make opposite zigzag with left side row, in the pixel of upside, source line 15 (the source line on right side in this pixel) configuration that oriented electrodes 40 is connected along the pixel thin film transistor (TFT) 19 with the right neighbour of this pixel, in the pixel of downside, oriented electrodes 40 is in the upside bending of this pixel, along the source line 15 that is connected with the thin film transistor (TFT) 19 of this pixel (the source line in left side in this pixel) configuration.

That is, in the liquid crystal indicator of present embodiment, in clipping a root line 15 adjacent two

pixel

17a, 17b, oriented electrodes 40 is along each opposite side configuration of these pixels, simultaneously, in source line 15 directions two pixels side by side, also each the opposite side along these pixels disposes.

Present embodiment is also same with above-mentioned first to fourth embodiment, and in adjacent two pixels, the vergence direction of electric field is opposite, the vergence direction of liquid crystal molecule is also opposite, so the asymmetric contrast that causes because of the liquid crystal aligning direction is produced the effect at the angle of broadening one's vision by adjacent two pixel equalizations.In addition, same in the present embodiment with first embodiment, not only clip two adjacent pixels of source line 15, and for also producing above-mentioned effect along source line 15 two pixels arranged side by side.Therefore, the broaden one's vision effect at angle of integral body is remarkable.In addition, along between source line 15 directions two pixels side by side, even produce along the position of door line 16 discrete, because of the setting of deceiving mask does not have influence to aperture opening ratio.

The invention is not restricted to the foregoing description, in the scope that does not break away from purport of the present invention, can do various changes.For example, in above-mentioned first to the 5th embodiment, be with oriented electrodes be formed on the door line with layer or be formed on a line lower floor, all oriented electrodes are all at the example of the lower floor of pixel capacitors.But, among the present invention also can oriented electrodes and pixel capacitors be configured in layer or with pixel capacitors laterally side by side.In addition, in the foregoing description, thin film transistor (TFT) is staggered, but this thin film transistor (TFT) is also staggered.

Below, with reference to Figure 16 to Figure 19 the sixth embodiment of the present invention is described.

Figure 16 represents the planimetric map of all pixel design in the present embodiment liquid crystal indicator.Figure 17 be liquid crystal indicator shown in Figure 16 want portion's enlarged drawing.Figure 18 is the sectional view that dissects expression at the film crystal tube portion.Figure 19 is the sectional view that pixel capacitors is partly dissectd expression.

In the present embodiment, thin film transistor (TFT) is to be example to fall staggered.

Figure 16 is the figure that is used to illustrate present embodiment liquid crystal indicator feature.In this liquid crystal indicator, be provided with the some source lines 115 (signal wire) and the some door lines 116 (sweep trace) of mutual orthogonal, the zone of being divided by these lines 115,116 forms two

pixel

117a, 117b that isolate.These two

pixel

117a, 117b are along source line 115 directions side by side.Near each intersection point of source line 115 and door line 116, be provided with thin film transistor (TFT) (this is not shown), in two

pixel

117a, 117b of the 115 adjacent isolation of source line, the door line 116 corresponding with each pixel is that the center disposes symmetrically with the shielding wire M between

pixel

117a, 117b.

Figure 17 is the partial enlarged drawing of Figure 16.The figure shows the planar configuration of this liquid crystal indicator.Source line 115 and door line 116 are provided with on orthogonal ground each other, and the zone of being divided by these lines 115,116 forms two

pixel

117a, 117b that isolate.Near each intersection point of source line 115 and door line 116, be provided with thin film transistor (TFT) 119, the source electrode 120 of thin film transistor (TFT) 119, gate electrode 121 stretch out from source line 115, door line 116 respectively.Pixel capacitors 124 is connected with the drain electrode 122 of thin film transistor (TFT) 119 by contact hole 123.

Clip among shielding wire M adjacent two pixel 117a, the 117b, for example among four of Figure 17 pixels, in the pixel 117a in left side, door line 116 is located at the left side in this pixel, in the pixel 117b on right side, door line 116 is located at the right side in this pixel, clips each line 116 among shielding wire M adjacent two pixel 117a, the 117b, and each the opposite side in these

pixels

117a, 117b disposes symmetrically.

Figure 18 represents the cross-sectional configuration of present embodiment liquid crystal indicator.This liquid crystal indicator on the surface of first substrate 125, is provided with thin film transistor (TFT) 119, pixel capacitors 124 as shown in figure 18.On the surface of second substrate 126, be provided with color filter 127, black mask 128 and electrode 129 in opposite directions.Between this a pair of substrate 125,126, be provided with liquid crystal layer 141.Here the liquid crystal of Cai Yonging can be to have negative electricity Jie to lead anisotropic liquid crystal, also can be to have positive electricity Jie to lead anisotropic liquid crystal.Not shown oriented film.

In the part of thin film transistor (TFT) 119, on first substrate 125, form the gate electrode 121 of deriving from door line 116, and form cover this gate electrode 121 by SiO ₂Or SiN _xDeng the gate insulation film 130 that constitutes.Above the gate insulation film 130 above being positioned at gate electrode 121, be provided with the semiconductor layer 131 that constitutes by amorphous silicon (a-Si), on this semiconductor layer 131, n be set ⁺ Type a-Si layer 132 forms drain electrode 122 that is made of electric conductors such as aluminium and the source electrode 120 of deriving from source line 115 more thereon.And form to cover these drain electrodes 122, source electrode 120 by SiO ₂Or SiN _xDeng the passivating film 133 that constitutes, and, form to connect the contact hole 123 of this passivating film 133 on drain electrode 122, the pixel capacitors 124 that the ITO that is electrically connected by this contact hole 123 and drain electrode 122 etc. is made of the transparent conductivity material is formed on the passivating film 133.

In the liquid crystal indicator of present embodiment, clip liquid crystal layer 141 in opposite directions pixel capacitors 124 and apply electric field between the electrode 129 in opposite directions, drive liquid crystal molecule.But usually, pixel capacitors 124 is that current potential, a door line 116 of about 1 to 10V are not applying under the state of scanning voltage, is the current potential about 6V, so, the big potential difference (PD) of generation between pixel capacitors 124 and door line 116.As a result, as shown in figure 19, at pixel capacitors 124 and the electric field E that produces between the electrode 129 in opposite directions, be arranged on pixel capacitors 124 same substrates on door line 116 attract, electric field E is oblique to 116 inclinations of door line.At this moment, left and right directions is the short side direction of pixel capacitors 124 among Figure 19, so electric field E tilts especially easily.In addition, when having applied scanning voltage on door line 116, though pixel capacitors 124 and the potential difference (PD) of door between the line 116 reduce, scanning voltage applies with impulse form moment ground, and the orientation direction of liquid crystal is not influenced.

Clip among shielding wire M adjacent two pixel 117a, the 117b, the position of the door line 116 in pixel 117 is that symmetry is promptly opposite each other, so, the vergence direction of electric field E is also opposite, arrow E is represented vergence direction among Figure 16, as shown by arrow E, corresponding with the electric field E that tilts towards all directions, liquid crystal molecules tilt erects.In addition, clip between two pixels in opposite directions of two door lines 116,116, its electric field E direction is opposite.Because this effect, the asymmetrical contrast that produces because of the liquid crystal aligning direction, by along source line 115 directions two

pixel

117a, 117b equalization side by side, the structure of this liquid crystal indicator, the angle of can integral body broadening one's vision.

In the liquid crystal indicator of present embodiment, not as being provided with the available liquid crystal display device of surrounding electrode, generation is dispersed in pixel central authorities, even produce the discrete also just generation of the position (for example position shown in the label D among Figure 19) between adjacent image point 117a, 117b.But, even this position also is the position that black mask 128 is set in common liquid crystal indicator, so in the structure of present embodiment, dispersing has no adverse effects to aperture opening ratio.

Therefore, according to the liquid crystal indicator of present embodiment, have and do not reduce aperture opening ratio and the effect at the angle of can broadening one's vision.

In addition, in the liquid crystal indicator of present embodiment, oriented electrodes needn't be set especially, thereby can obtain above-mentioned effect with open-and-shut Wiring construction.

Below, with reference to Figure 20, Figure 21 the seventh embodiment of the present invention is described.

Figure 20 is the planimetric map of the pixel design of expression present embodiment liquid crystal indicator.Figure 21 is the sectional view that partly dissects expression in pixel capacitors.

The liquid crystal indicator of present embodiment, the structure of its first substrate-side and the 6th embodiment are identical, only are that the window this point is set on the electrode in opposite directions of second substrate-side is different with the 6th embodiment.Among Figure 20, Figure 21, annotate with same numeral with part identical among Figure 16 to Figure 19, its detailed description is omitted.

In the above-mentioned liquid crystal indicator, pixel capacitors and in opposite directions between electrode or the potential difference (PD) between pixel capacitors and oriented electrodes, because of the relative position relation of these electrodes, the case of bending of its electric field changes, the heeling condition of liquid crystal molecule also changes.By regulating the heeling condition of this liquid crystal molecule, can control the angle of visibility interdependence of contrast.At this moment, only use the structure of the 6th embodiment, the degree of tilt of liquid crystal molecule is not enough, if will strengthen degree of tilt, then as Figure 20 and the present embodiment shown in Figure 21 structure, with pixel capacitors 124 electrode in opposite directions 129 in opposite directions in, formation window 137 gets final product.This window 137 is formed on the limit of top away from door line 116 of pixel capacitors 124, promptly along the part of shielding wire M.

When on electrode 129 in opposite directions, forming such window 137, as shown in figure 21, end in pixel capacitors 124 away from door line 116 sides, there is not electrode 129 in opposite directions above it, so, pixel capacitors 124 and the electric field E ' that produces between the electrode 129 in opposite directions electric field (the electric field E among Figure 19) when not establishing window is compared, and is the state of inclination more.Like this, on the electrode 129 window 137 is being set in opposite directions, and, can changing the heeling condition of liquid crystal molecule, the angle of visibility interdependence of may command contrast the size optimization of this window 137.

In addition, among Figure 20, be to be located at window between two pixels of upside respectively and between two pixels of downside, but also can be separately, but be arranged to the window of a connection these windows.

In addition, as shown in figure 20, all in the pixel whole electrode in opposite directions 129 be not set, but such as shown in figure 22, the 129a of cutting apart of electrode in opposite directions is set in each pixel, cut apart the shielding wire portions cut of electrode 129a in opposite directions along this, become 137a.

The invention is not restricted to the foregoing description, in the scope that does not break away from purport of the present invention, can do various changes.For example, in the foregoing description, thin film transistor (TFT) is to be example to fall staggered, but this thin film transistor (TFT) also can be staggered.

As mentioned above, according to liquid crystal indicator of the present invention, clipping every a ground in two adjacent pixels of signal wire, because oriented electrodes is along this signal wire and be located at this signal wire both sides, so in these two pixels, electric field is the signal line side inclined in opposite directions of two pixel central authorities towards oriented electrodes respectively, and corresponding with the electric field that tilts to all directions, liquid crystal molecules tilt erects.In addition, in adjacent two pixels, the relation that electric field tilts does not in the opposite direction have and sets in adjacent two pixels of the signal wire of electrode too clipping.As a result,, clipped adjacent two pixel equalizations of signal wire, enlarged the angle of visibility of entire liquid crystal display device because of the asymmetric contrast that the liquid crystal aligning direction produces.

In addition, liquid crystal indicator of the present invention, as being provided with the available liquid crystal display device of surrounding electrode, generation is not dispersed in pixel central authorities, even produce discrete yet only being created in along the signal wire position between adjacent image point.And this position is the position that black mask is set in common liquid crystal indicator, so in the present invention's structure, dispersing has no adverse effects to aperture opening ratio.

In addition, in the liquid crystal indicator of the present invention, in two pixels of the isolation adjacent along signal wire, with these two pixel corresponding scanning line be that the center disposes symmetrically with the shielding wire, so, towards the scan line side inclined in opposite directions of each pixel, corresponding with the electric field that tilts towards all directions, liquid crystal molecules tilt erects electric field respectively.Like this,, clipped adjacent two pixel equalizations of signal wire, can be enlarged the angle of visibility of integral body by the asymmetric contrast that the orientation direction of liquid crystal produces.

In addition, as the available liquid crystal display device of surrounding electrode is set, generation is dispersed in pixel central authorities, also only is created in along the position of shielding wire between adjacent image point or sweep trace even generation is discrete.And this position is the position that black mask is set in common liquid crystal indicator, so dispersing that structure of the present invention produces has no adverse effects to aperture opening ratio.

In addition, oriented electrodes needn't be set especially, can obtain above-mentioned effect with open-and-shut Wiring construction.

Claims

1. liquid crystal indicator, its liquid crystal layer is located between a pair of substrate, among this a pair of substrate, on the forward surface of side's substrate, some signal line and some sweep traces are set mutually orthogonal, the zone of being divided by these lines forms pixel, near each intersection point of aforementioned signal wire and sweep trace, thin film transistor (TFT) is set, simultaneously, with pixel capacitors that the aforementioned thin film transistor (TFT) of aforementioned each pixel is connected between, oriented electrodes applies electric field to aforementioned liquid crystal layer, and in adjacent two pixels, this oriented electrodes clips signal wire and along this signal wire and be located at this signal wire both sides every a ground, it is characterized in that, aforementioned oriented electrodes is the part that the part of aforementioned each sweep trace is stretched out along aforementioned each signal wire bearing of trend, and, spaced apart in the adjacent image point of aforementioned signal wire direction side by side, by oriented electrodes and sweep trace, with the electric field that in opposite directions pixel capacitors forms, the liquid crystal of a directed pixel by orthogonal both direction.

2. liquid crystal indicator, it is characterized in that, liquid crystal layer is located between a pair of substrate, among this a pair of substrate, on the forward surface of a side substrate, some signal line and some sweep traces are set mutually orthogonal, the zone of being divided by these lines forms pixel, near each intersection point of aforementioned signal wire and sweep trace, thin film transistor (TFT) is set, simultaneously, with pixel capacitors that aforementioned thin film transistor (TFT) in aforementioned each pixel is connected between, oriented electrodes applies electric field to aforementioned liquid crystal layer, this oriented electrodes is arranged to zigzag along aforementioned signal wire and aforementioned sweep trace, and, clip signal wire every a ground, in adjacent two pixels, along this signal wire and be located at the both sides of this signal wire, by the oriented electrodes of zigzag configuration, with the liquid crystal of the directed pixel of electric field of both direction.

3. the liquid crystal indicator described in claim 1 or 2 is characterized in that, the capacity electrode that is connected with aforementioned pixel capacitors is provided with in opposite directions by dielectric film and aforementioned oriented electrodes, constitutes the capacity portion of accumulating by these capacity electrodes, dielectric film, oriented electrodes.

4. the liquid crystal indicator described in claim 1 or 2, it is characterized in that, with aforementioned side's substrate the opposing party's substrate in opposite directions on be provided with electrode in opposite directions, be provided with window on the electrode in opposite directions at this, this windowsill the side that is provided with oriented electrodes that is positioned at aforementioned pixel and the edge part setting of opposition side.