JPH0495928A - Liquid crystal display device - Google Patents

Abstract

PURPOSE:To prevent regular light-shade stripes from being formed by arranging an area where light is not transmitted in the center of a rectangular area which varies in light transmissivity, dividing the area longitudinally and laterally at constant intervals, and nearly equalizing the divided areas in area. CONSTITUTION:Opening parts 504 and 505 which are nearly equal in area are arranged in one display dots at a distance 503 which is about a half as long as the longitudinal pitch 317 of display dots, and lateral intervals of all opening parts are equal to the lateral pitch 316 of the display dots. the spatial frequency of the display dots is prescribed laterally by the reciprocal of the lateral pitch 316 and longitudinally by the reciprocal of the distance 503 at which the two opening parts 504 and 505 are arranged at equal intervals. Consequently, the spatial frequency of the display dots is prescribed by the reciprocal of the longitudinal pitch 317 and the quantity of transmitted light becomes constant, so that the light-shade stripes are never generated on alternate lines.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a liquid crystal display device in which pixels are arranged in a matrix.

[Conventional technology]

An example of a system using a conventional liquid crystal display will be explained.

FIG. 7a shows an example in which a liquid crystal display is applied to a display section of a desktop computer, which is composed of a computer main body 1, a keyboard 2, and a liquid crystal display 3. Compared to displays using conventional cathode ray tubes (hereinafter abbreviated as CRT), they are light, have a short depth, and consume less power. In particular, its features can be applied to systems that allow multiple operators to work at the same time using multiple keyboards 2 and liquid crystal displays 3 on one computer body 1, and to lap-type computers that require further weight reduction. is fully demonstrated. Therefore, by using a liquid crystal display in the display section of a computer, it is possible to
A space-saving computer for personal use can be realized.

FIG. 7b shows another application example of a liquid crystal display, in which a liquid crystal display is used as a part of the optical shutter of a projection type display. The system consists of a projection section 4 including a liquid crystal display and an optical system, a screen 5, and a video signal processing section (not shown). The video signal input from the outside is converted by the video signal processing section into a signal format necessary for display on the liquid crystal display, such as a non-interlaced RGB digital signal, and an image is displayed on the liquid crystal display. This display image is formed on a screen through an optical system. Among these components, the optical shutter is the main factor that determines the dimensions of the optical system. The optical system as a whole can be made smaller.

In addition, small color monitors and large wall-mounted televisions can be realized by using the characteristics of liquid crystal displays such as their small size and thinness.

FIG. 8 shows an example of the electrical configuration of a conventional liquid crystal display system. The system includes an information processing system 220 such as a work station, a personal computer, a word processor, etc., and a display system 200.

The display system 200 includes a liquid crystal display panel 202, a light source 201, a light source adjustment circuit 2O3, an image data generation circuit 204A, and a timing signal generation circuit 204B.
A control circuit 204 consisting of a control circuit 204, the brightness of the liquid crystal,
It is composed of a contrast adjustment circuit 205, a storage capacitor drive voltage generation circuit 205, and a common electrode drive voltage generation circuit 206.

The liquid crystal display module 202 includes the liquid crystal panel 21
7. Consists of a signal circuit 207 and a scanning circuit 208 that generate signal voltages and scanning voltages.

The liquid crystal panel 217 is made of A-8i (amorphous silicon) TP.
TFT made of Sl (polycrystalline silicon) etc.
(Thin Film Transistor)2
11, a storage capacitor 212, a liquid crystal 214, a signal line 210 for driving the TFT, and a scanning line 209. It is made up of.

The Vstg voltage generated by the storage capacitor drive voltage generation circuit 205 and the Vc generated by the common electrode voltage generation circuit 206.
The om voltage may be applied to the storage capacitor common line 215 and the common electrode terminal 213, respectively, or they may have the same voltage level and phase.

Furthermore, the connection method between the storage capacitor 212 and the storage capacitor common line 215 may be the connection example shown in FIG. Furthermore, the method of connecting the signal line 210 and the signal circuit 207 is as shown in the connection example shown in FIG. You may. Although not shown in FIG. 8, there is no particular limitation on the method of connecting the scanning line 209 and the scanning circuit 208.

In FIG. 8, if part or all of the signal circuit 207 and the scanning circuit 208 are integrated with the liquid crystal panel, the device can be simplified, the reliability of connections etc. can be improved, and it is advantageous to lower costs. At this time, the means for configuring the signal circuit and the scanning circuit are as follows: (1) The circuits are placed on the liquid crystal panel 217 by
(2) means for attaching the single crystal Si substrate on which the circuit is formed to the liquid crystal panel 217;

(3) Means that combines the above two means Each configuration means can be taken.

FIG. 11 shows a liquid crystal display module 202. As shown in FIG. The liquid crystal display module 202 includes a liquid crystal panel 2
18, signal circuit boards 227 to 234, scanning circuit board 22
2 to 224, common electrode voltage VcOm and storage capacitance voltage V
s t g drawer board 225.226.235.23
6. Consists of a signal supply board 220.

The signal supply board 220 is supplied with image data signals, power supply voltage, etc. via a signal cable 221.

Signal circuit boards 227 to 234 and scanning circuit board 222
An example of .about.224 is shown in FIG. The circuit board is a circuit board in which an integrated circuit 237A having a signal circuit or a scanning circuit formed thereon is attached to a patterned organic film or the like. The pattern wiring 237B is an output terminal for a scanning voltage or a signal voltage, and the pattern wiring 237C is an input terminal for an image data signal and a power supply voltage for operating the integrated circuit 237A.

The common electrode voltage V com is applied to the common electrode terminal 238 , and the storage capacitor voltage V s t g is applied to the storage capacitor common line 215 .

Furthermore, if the drawer boards 225, 226, 235, and 236 are made of a flexible board such as an organic film, mounting becomes easier.

The pixel configuration of conventional TPT drive type liquid crystal display devices is red (R) when performing color display.

One pixel is composed of display dots of three primary colors, green (G) and blue (B). Among these, in the case of liquid crystal displays for image display, pixels are arranged around the vertices of a triangle called a triangle arrangement or a delta arrangement.
High image quality is achieved by arranging square dots at equal intervals and minimizing the distance between the dots, that is, maximizing the spatial frequency of the dots to make the dots less noticeable. However, in displays for computers and word processors that have many characters and lines, particularly in straight line portions, the display becomes conspicuous with jagged irregularities, degrading the display quality. Therefore, in liquid crystal displays for computers and word processors, each of the RGB colors is arranged in stripes, and one approximately square pixel is formed by a combination of three vertically elongated RGB dots. In this way, by arranging the display dots in a stripe pattern, it is possible to display a straight line without any jaggedness or unevenness. At this time, each vertically long display dot may be one without being divided, or even if it is divided, there is no regularity in its arrangement.

[Problem to be solved by the invention]

Among the elements related to the display quality of the liquid crystal display in which the display dots of the above-mentioned prior art are arranged in stripes for each color of RGB, the shape of the display dots constituting the pixels and the shape of the openings in the display dots of the liquid crystal display are important. Furthermore, no consideration was given to the regularity of the arrangement, and in particular, regular striped noise and step-like noise occurred when diagonal lines were displayed, causing display quality problems. .

An object of the present invention is to provide a high-quality image in which regular striped noise does not occur when display dots are vertically elongated.

An object of the present invention is to reduce step-like noise that occurs when displaying diagonal lines and curves.

[Means to solve the problem]

The above object is to create a plurality of rectangular regions whose light transmittance changes according to the voltage applied to the liquid crystal, and regions that do not transmit light, which are arranged around the rectangular region whose light transmittance changes. In a liquid crystal display device in which pixels are arranged in a matrix, the transmittance of surface light changes. - A rectangular area is divided by arranging a region that does not transmit the light in the center,
This is achieved by making the spacing constant both vertically and horizontally.

The above object is achieved by making the areas of the divided regions where the transmittance of the light changes equal to each other.

The above object is achieved by setting the ratio of the vertical and horizontal spacing of the divided regions where the transmittance of the light changes to 2 or less.

The above object is achieved by making the width of the region that does not transmit light, which is arranged around the region where the light transmittance changes, substantially equal in the vertical and horizontal directions.

The above object is achieved by arranging each of the divided areas where the transmittance of light changes and the divided area where the transmittance of light changes in the horizontal direction to be shifted from each other in the vertical direction. be done.

[Effect]

By dividing a rectangular area where the light transmittance changes by placing a non-light-transmitting area in the center, making the interval constant in both the vertical and horizontal directions, and making the areas of the areas approximately equal, the display dots can be Since the spatial frequency can be maximized, the display becomes uniform and the occurrence of regular shading stripes can be prevented.

Even if the ratio of the vertical and horizontal arrangement pitch of the area where the light transmittance changes is about 3, by configuring the display dots in multiple areas, the ratio of the vertical and horizontal arrangement pitch will be less than 2, and the visual effect will be reduced. A natural display can be obtained.

In addition, by making the width of the area that does not transmit light approximately equal in each direction, the spatial frequency of the area that does not transmit light can be maximized, resulting in a uniform display and regular shading stripes. can be prevented from occurring.

Furthermore, each of the divided regions where the transmittance of light changes is arranged to be shifted from the other divided regions where the transmittance of light changes in the horizontal direction from each other in the vertical direction.
By giving the display dots a slope, it is possible to obtain high-quality display in which step-like noise is inconspicuous with respect to diagonal lines and curved lines.

〔Example〕

Embodiments of the present invention will be described with reference to the drawings.

Figure 1 shows a pattern in which the apertures of the TPT-driven color liquid crystal display device of this embodiment, whose light transmittance changes depending on the voltage applied to the liquid crystal and can display an image, are divided into regions that are opaque to light. show.

The opening patterns 504 and 505 are formed by a light-shielding layer on the color filter substrate and opaque parts such as gate electrodes, scanning lines, storage capacitor electrodes, source electrodes, and drain electrodes (none of which are shown) on the TPT substrate. is defined as an area that does not contain

In this embodiment, the pixel 322 includes three primary colors, red (R
), green (G), and blue (B) color filters.
) 502, and furthermore, in one display dot, the area is equal and about half of the vertical pitch 317 of the display dot.
The openings 504 and 505 are arranged at a distance 503, and the lateral spacing of all the openings is equal to the lateral pitch 316 of the display dots. In this embodiment, the spatial frequency of the display dots, which is a friction representing display uniformity and resolution, is defined by the reciprocal of the horizontal pitch 316 in the horizontal direction and is the same as in the conventional configuration, but in the vertical direction, Since the two openings 504 and 505 are arranged at equal intervals, the distance is determined by the reciprocal of the distance 503. Opening 5
If the spacing between 04 and 505 is not equal, dark and light stripes will occur every other line, and as a result, the spatial frequency of the display dots will be defined by the reciprocal of the vertical pitch 317.

Furthermore, since the areas of the openings are made equal, the amount of light that passes through each section is also constant, and light stripes do not occur every other line. At this time, the amount of transmitted light and the center coordinates of the aperture are important, and it is desirable for the shape of the aperture to be square or close to a circle from the point of view of symmetry, but if it is made in any other shape, the features of the present invention will be lost. However, the shapes of the plurality of openings constituting the display dots may be different.

The uniformity of display is improved by bringing the aspect ratio of the openings closer to 1:1. The upper limit of this aspect ratio varies from the human resolution limit of 100 to the size of the display dot. That is, at the distance of clear vision (approximately 30 cm),
If both the vertical and horizontal dimensions of the display dot are smaller than about 0.1 mm, humans cannot recognize the shape of the display dot. Therefore, at this time, there is no need to consider the number of openings or their arrangement intervals. Conversely, if at least one of the length and width of the display dots is larger than 0.1 mm, the aspect ratio of the arrangement interval of the apertures, that is, in the case of vertical stripes, the distance 503/display is about half of the vertical pitch 317. The value of the horizontal pitch 316 of the dots, in the case of horizontal drive, approximately half the distance M503 of the horizontal pitch 316/vertical pitch 317 of the display dots.
It is desirable to set the value to 1°5 or less, and by setting the value to a range not exceeding 2 at most, display quality can be improved. In this embodiment, when the aspect ratio of display dots (vertical pitch 317 of display dots/horizontal pitch 316 of display dots) is 3, the arrangement of the openings is achieved by providing two openings per dot at equal intervals. The aspect ratio of the interval is 1.5.

Therefore, according to the present embodiment shown in FIG.
In addition, when one display dot consists of multiple apertures, such as in a vertical stripe type color liquid crystal display device, the spacing of the apertures is constant in the vertical and horizontal directions, and the area of each aperture is equal. At the same time, by setting the aspect ratio of the arrangement interval of the openings to 1.5 at maximum and 2 or less.

It is possible to realize a high-quality color liquid crystal display device with good display uniformity even if the display dot shape is vertically elongated.

FIG. 2 shows another embodiment of the invention. The basic configuration is the first
an opaque storage capacitor electrode 5 ], similar to the embodiment shown;
0 between the opening 512 and the opening 513, and the same opaque gate electrode 511 between the opening 513 and the next opening 512.
Place it between the two as shown in the figure.

By making the widths of the storage capacitor electrode 510 and the gate electrode 511 equal, the widths 523 and 524 of the corresponding light shielding portions can be made equal.

In addition, since the storage capacitor electrode 510 can be relatively freely arranged vertically and vertically, the spacing and area of the openings 512 and 513 can be set equally, so that uniformity of display can be achieved as in the embodiment shown in FIG. A high-quality color liquid crystal display device with good quality can be realized.

Further, in particular, as the resolution of liquid crystal display devices increases, the area of display dots decreases by /J%, so the ratio of the light shielding portion increases relatively. In such high-resolution liquid crystal displays, not only the apertures for displaying images, but also the spacing and area of the light shielding parts are made constant between each aperture, thereby achieving a higher quality color liquid crystal display device. can.

FIG. 3 shows another embodiment of the invention. For convenience of explanation, only pixels, display dots, and their openings are illustrated, but other components are substantially the same as the embodiment shown in FIG. In this embodiment as well, the shape of the pixel 322 indicated by the dashed line and the display dots 319, 320, and 321 of each color indicated by the broken line are the same, but the openings 51 of the adjacent display dots in each pixel are the same.
9.520.521 in that at least some of them are arranged so that they do not overlap. By arranging the filters in this manner, it is possible to prevent the occurrence of vertical and horizontal stripes that are characteristic of a vertical stripe type color filter arrangement.

In particular, in the embodiment shown in Fig. 3, when displaying a white line that is frequently displayed as a straight line or curve, an opening is arranged to cut a part of the corner of each display dot, so that a display with an inclined angle is not possible. It is possible to achieve high-quality display with inconspicuous step-like noise.

Next, the configuration and manufacturing method of the liquid crystal display section of the TPT drive type color liquid crystal display device of this embodiment will be explained with reference to FIGS. 4 to 6b.

FIG. 4 also shows the structure including the liquid crystal display device, and shows the color filter pattern of the upper transparent glass substrate of the main part of the liquid crystal display section in which a plurality of pixels are arranged. In FIG. 4, in order to clarify the positional relationship between the pixel pattern on the lower transparent glass substrate and the color filter pattern, the frames of the horizontal pitch 316 and vertical pitch 317 of display dots are shown with broken lines. Note that the color filter pattern in Figure 4 is based on the back surface of the upper transparent glass substrate (
3 is a plan view seen from the opposite side of the liquid crystal. As is clear from FIG. 4, the color filters are arranged for each display dot at a position facing the display dots and are colored differently. That is, like the display dots, the color filter is formed in the intersection area of two adjacent scanning signal lines and two adjacent video signal lines. On the inner surface (liquid crystal side) of the upper transparent glass substrate, a light shielding layer 318, a red filter layer (R) 319, and a green filter layer (G) 32 are provided.
0, a pattern of a blue filter layer (B) 321 is formed, and a common transparent electrode is further provided over the entire surface of the liquid crystal display section. Red filter layer (R) 319. The patterns of the green filter layer (G) 320 and the blue filter layer (B) 321 extend in the column direction, and are arranged in the order of R, G, and B in the row direction. This arrangement order may be G, R, B or another order. In any order, the color of the filter is a single color in the column direction. In this way, the color filter has a vertical stripe arrangement structure.

FIG. 5 shows the pixel pattern on the lower transparent glass substrate and the color filter pattern on the upper transparent glass substrate at the same time. In the liquid crystal display device of the present invention, multicolor display is performed by additively mixing the colors of the RlG and B dots arranged side by side. That is, one unit of display pixel 322 is composed of nine dots arranged side by side in the horizontal direction. The horizontal and vertical dimensions of the pixel 322 are set to be approximately the same.

Therefore, the horizontal dimension of the pixel is set to approximately one third of the vertical dimension.

A desired number of pixels having the above structure are arranged to constitute a liquid crystal display section. A backlight as a light source is installed on the back side of the lower transparent glass substrate of the liquid crystal display section, that is, on the opposite side of the liquid crystal. The voltage (effective value of AC voltage) between the transparent pixel electrode of the pixel on the lower transparent glass substrate and the common transparent electrode on the upper transparent glass substrate is applied to the liquid crystal between the upper and lower glass substrates, so that the liquid crystal Display is performed by changing the alignment state and changing the light transmittance of the backlight.

FIG. 6a shows display dots on a liquid crystal display section of a TPT drive type color liquid crystal display device. When an opaque storage capacitor electrode 433 is placed at the center of a conventionally elongated opening as shown in FIG. 6a, an opening pattern as shown in FIG. 1 is obtained.

A cross section taken along line A-A' in FIG. 6a is shown in FIG. 6b.

In FIG. 6b, one dot of the liquid crystal display section is a thin film transistor T on the inner surface of the lower transparent glass substrate 400.
It is composed of an FT 410 and a transparent pixel electrode 420. The lower transparent glass substrate 400 has a thickness of, for example, about 1.1 μm. The thin film transistor TPT of each dot mainly has a gate electrode 411 and a gate insulating film 412.
．． It is composed of a type 1 (intrinsic, not doped with conductivity type impurities) amorphous 81 semiconductor layer 413, a pair of source electrodes 414, and a drain electrode 415. Each dot is connected to two adjacent scanning signal lines 402.
and two adjacent video signal lines 401 intersect with each other. The scanning signals W2O3 extend in the column direction, and a plurality of scanning signals are arranged in the row direction. The video signal lines 401 extend in the row direction, and a plurality of video signal lines 401 are arranged in the column direction.

Gate electrode 411 and storage capacitor electrode 4 shown in FIG. 6a
33 is formed using an aluminum film with a thickness of about 1100 nm. Among these, the gate electrode 411 is formed to be larger than the Si semiconductor layer 413 so as to completely cover it (as viewed from below). Therefore, when a backlight such as a fluorescent lamp is attached below the lower transparent glass substrate 400.

This opaque gate electrode 411 forms a shadow, and the Si semiconductor layer 413 is not irradiated with backlight light, making it difficult for the conductive phenomenon caused by light irradiation, that is, deterioration of the off-characteristics of the thin film transistor TFT 410 to occur.

Further, the storage capacitor electrode 433 is arranged between adjacent scanning lines 402 and forms a storage capacitor between it and the transparent pixel electrode 420 with the gate insulating film 412 interposed therebetween. Gate electrode 4
11. The scanning line 402 and the storage capacitor electrode 433 may be integrally formed in a single layer considering only the gate, light shielding, and storage capacitor functions; in this case, Sj is contained as an opaque conductive material. A1, pure A1, A1 containing pct, etc. can be selected.

Gate insulating film 412 of thin film transistor TFT410
is formed in the upper layer of the gate electrode 411, the scanning signal line 402, and the storage capacitor electrode 433. Gate insulating film 41
2 is formed using, for example, a silicon nitride film formed by plasma CVD, and has a thickness of about 300 nm. Further, the gate insulating film has a so-called two-layer gate insulating film structure in which the gate electrode is partially converted into alumina by anodization or the like of an aluminum film and used as an alumina gate insulating film 416. This alumina gate insulating film 4
Reference numeral 16 indicates a gate electrode 411 and upper wiring portions, such as a scanning signal line 401 and a train, source electrodes 415, 4
It also acts to prevent short circuit with the metal film used in 14. The Si-type semiconductor layer 413 is formed of an amorphous silicon film or a polycrystalline silicon film, and has a thickness of about 180 nm. This Si semiconductor layer 413 is formed continuously with the formation of the silicon nitride gate insulating film 412 by changing the components of the supplied gas in the same plasma CVD apparatus without being exposed to the outside from the apparatus. Further, a phosphorous-doped N+ layer 413a for ohmic contact is similarly formed continuously to a thickness of about 40 nm. Thereafter, the lower transparent glass substrate 400 is taken out from the CVD apparatus, and a Si semiconductor layer 41 is formed using photolithography technology.
3 is patterned into an island shape.

The transparent pixel electrode 420 uses a transparent conductive film (ITO: Nesa film) formed by sputtering, and has a thickness of 120 nm to 20 nm.
It is formed with a film thickness of 0 nm. Thereafter, each pixel is patterned using photolithography technology.

The source electrode 414 and the train electrode 415 are each formed by overlapping a first conductive film A and a second conductive film B from the bottom in contact with the N+ semiconductor layer 413a. The first conductive film A and the second conductive film B of the source electrode 414 and the drain electrode 415 are each manufactured in the same process. The first conductive film A is
Using a chromium film formed by sputtering, 50 to 1100n
It was formed with a film thickness of . If the chromium film is made thicker than necessary, stress will increase, so the chromium film is formed to a thickness not exceeding 200 nm. The chromium film is the N1 semiconductor layer 4
Good contact with 13a. The chromium film serves as a so-called barrier layer that prevents aluminum of a second conductive film B, which will be described later, from diffusing into the N+ semiconductor layer 413a. As the first conductive film, in addition to chromium, a high melting point metal film (M
o, Ti, T a , W) + refractory metal silicide film (MoSi2, T i S i 2, T a S i
2, WSi2). The second conductive film B is
300-400 by aluminum sputtering method
It is formed to a film thickness of nm. Since the aluminum film has less stress than the chromium film, it can be formed thicker and is configured to reduce the resistance values of the source electrode 414, the train electrode 415, and the video signal 401. The second conductive film B is a thin film transistor TFT41
The device is configured to increase the operating speed of 0 and the signal transmission speed of the video signal line. In other words, the second conductive film B can improve the writing characteristics of pixels.

In addition to the aluminum film, the second conductive film B may be formed of an aluminum film containing silicon (Si) or copper (Cu) as an additive. The source electrode 414 and the drain electrode 415, which are composed of the first conductive film A and the second conductive film B, are each patterned by photolithography. At this time, the N+ semiconductor layer 413a is
A portion is removed using the photolithographic mask, the first conductive film A, and the second conductive film B as masks. That is, the Si semiconductor layer 4
The portions of the N+ semiconductor layer 413A remaining on the semiconductor layer 13 other than the first conductive film A and the second conductive film B are removed by the thickness thereof in a self-aligned manner.

Thereafter, silicon nitride is formed to a thickness of 1 μm on the surface of the lower transparent glass substrate 400 by plasma CVD, terminals and the like are exposed by photolithography, and the entire surface of the pixel is protected with a silicon nitride protective film 417.

The liquid crystal 450 includes a lower alignment film 418 and an upper alignment film 41 that set the orientation of liquid crystal molecules in a space formed between the lower transparent glass substrate 400 and the upper transparent glass substrate 403.
9 and is enclosed. The lower alignment film 418 is
It is formed on the silicon nitride protective film 418 on the lower transparent glass substrate 400 side.

A light shielding layer 454, a color filter 451, and an organic protective film 452 are provided on the inner surface (liquid crystal side) of the upper glass substrate 403.
, the common transparent pixel electrode 453 and the upper alignment film 419
are sequentially stacked. The common transparent pixel electrode 453 is formed integrally with the upper transparent glass substrate 403, facing the transparent pixel electrode 420 provided for each pixel on the lower transparent glass substrate 400 side. This common transparent pixel electrode 453 is configured to be applied with a common voltage Vcom.

The color filter 451 is configured by coloring a dyed base material made of a resin material such as acrylic resin with a dye.

A color filter 451 is arranged for each display dot at a position facing the display dots, and is colored differently.

The organic protective film 452 is provided to prevent the dyes used to dye the color filters 451 into different colors from leaking into the liquid crystal. The organic protective film 452 is made of, for example, a transparent resin material such as acrylic resin or epoxy resin.

This liquid crystal display device has a lower transparent glass substrate 400
, each layer on the upper transparent glass substrate 403 side is formed separately, and then the upper and lower transparent glass substrates 400 and 403 are stacked on top of each other, and the liquid crystal is sealed between them, thereby assembling.

The central part of FIG. 6b shows a cross section of one pixel, while the left side shows a cross section of the left edge portion of the transparent glass substrates 400 and 403 where external lead wiring is present.

The right side shows a cross section of the right edge portion of the transparent glass substrates 400 and 403 where no lead wiring is present.

The sealing material 460 shown on the left and right sides of FIG. 6b is as follows:
It is configured to enclose liquid crystal 450, and is formed along the entire periphery of the transparent glass substrates 400 and 403, except for a liquid crystal inlet (not shown). The sealing material 460 is made of, for example, epoxy resin. The common transparent pixel electrode 453 on the upper transparent glass substrate 400 side is coated with silver paste 43 at least in one place.
2, it is connected to an external lead wiring formed on the lower transparent glass substrate 400 side. This external lead wiring is formed in the same process as each of the gate electrode 411, source electrode 414, and drain electrode 415. The alignment films 418 and 419, the transparent pixel electrode 420, the common transparent pixel electrode 453, etc. are formed inside the sealant 460.

The polarizing plates 430 and 431 are the lower transparent glass substrate 400,
It is formed on the outer surface of each of the upper transparent glass substrates 403.

When the liquid crystal display section is configured as described above, the opening of each pixel becomes a portion obtained by dividing the opening of the light shielding layer 454 on the upper transparent glass substrate 403 by the opaque storage capacitor electrode 433 on the lower transparent glass substrate 400. .

〔Effect of the invention〕

According to the present invention, in a liquid crystal display, one display dot is constituted by a plurality of regions in which light transmittance changes in the longitudinal direction, and the arrangement intervals are constant in both the vertical and horizontal directions, and the areas of each dot are equal. Alternatively, the spatial frequency of the display dot can be maximized by making the width of the area where light does not pass around the area where the light transmittance changes approximately equal in each direction. It is possible to provide a high-quality image that is uniform and prevents the occurrence of regular shading stripes.

Furthermore, by arranging adjacent areas where the transmittance of light changes so that they are not aligned vertically or eastward, it is possible to make the display dots have an inclination angle. You can obtain high-quality display quality with no noticeable noise.

[Brief explanation of drawings]

Fig. 1 is a plan view showing an embodiment of the present invention, Figs. 2 and 3 are plan views of other embodiments of the invention, and Figs. 4 to 6a show the configuration of an embodiment of the invention. Plan view, Figure 6b is Figure 6a
7a is a perspective view of a product according to the prior art,
FIG. 7b is a perspective view of a product according to the prior art, and FIGS. 8 to 12 are diagrams of a liquid crystal drive circuit according to the prior art. 316... Horizontal pitch of display dots, 317... Vertical pitch of display dots, 318... Light shielding layer, 319... Red filter layer, 320... Green filter layer, 321... Blue filter layer, 322...・Pixel. 433・Storage capacitor electrode, 500...Display dot red, 5
01... Display dot green, 502... Display dot blue, 5
04.505,512,513...opening. 316 display Do Soto's wrist pitch 317 display F ot O vertical pitch 322 ゛ pixels 500, display 5 o 19 display dot 5 o 2 ゛ display do 503: 3170 F) 2 ef) 1 (InE voice class de sho, 5
05゛Frontage group 3 Figure 319: Red filter layer 320, Kimiyu filter layer 321 Blue filter 7 row 3221 Wood 519.520゜52 Oki frontage diagram 510: Dry capacity electrode 5+1:) 7-t 11 512, 513 opening 523. 524: In the middle of Shou's brother p = 316 display dot F's horizontal bi-inch 317 also shows the Kisei and °- of L's square 318: L two light 1 319: 4: color fuinomuku layer 320: +t-e- 1a) L9/11321, Blue Fino t-'1/W Fig. 322, East Fig. 43B, ii Hand j Capacitive electrode Fig. 7b Fig. Fig. Fig. Trench drawing

Claims (1)

[Claims] 1. A rectangular region whose light transmittance changes depending on the voltage applied to the liquid crystal, and a region that does not transmit light and is arranged around the rectangular region whose light transmittance changes. In a liquid crystal display device having a plurality of pixels arranged in a matrix, the rectangular area where the light transmittance changes is divided by arranging a region that does not transmit the light in the center, and the intervals are constant in both the vertical and horizontal directions. A liquid crystal display device characterized by: 2. The liquid crystal display device according to claim 1, wherein the areas of the divided regions where the transmittance of the light changes are equal to each other. 3. The liquid crystal display device according to claim 1 or 2, wherein the ratio of the vertical and horizontal spacing of the regions where the transmittance of the divided light changes is 2 or less. 4. Among the claims 1 to 3, the width of the region that does not transmit light, which is arranged around the region where the light transmittance changes, is approximately equal in the vertical and horizontal directions. The liquid crystal display device according to any one of item 1. 5. Each of the divided areas where the light transmittance changes is arranged to be shifted from the other divided areas where the light transmittance changes in the horizontal direction from each other in the vertical direction. A liquid crystal display device according to claim 1 or 2.