TWI679476B - Lcd device with self-compensated electrode patterns - Google Patents

Abstract

An LCD device including a self-compensated indium tin oxide (ITO) electrode pattern, wherein each pixel region includes at least one sub-pixel region formed with a self-compensated electrode pattern, and at least an even number of slits are formed in the electrode pattern The relationship between the extension direction of each slit and the data line of the pixel area is parallel or forms an angle. Each pixel region may also include two sub-pixel regions, and each sub-pixel region is formed with a self-compensating electrode pattern having at least an even number of slits. The self-compensating electrode pattern in one sub-pixel region may be the same as or different from the self-compensating electrode pattern in the other sub-pixel region.

Description

Liquid crystal display with self-compensating electrode pattern

The present invention relates to a liquid crystal display (LCD) device, and more particularly, to a liquid crystal display having an indium tin oxide (ITO) or indium zinc oxide (IZO) electrode pattern with self-compensation for improving display quality.

One characteristic of liquid crystal molecules is that they have different optical rotation directions or different refractive effects in different arrangements. Liquid crystal displays use this characteristic to control light transmittance to produce images. Because of the structure of liquid crystal molecules and the influence of light characteristics, the twisted nematic liquid crystal display has good light transmittance, but the viewing angle of the display is very narrow.

To solve the problems of light transmittance and viewing angle, the twisted vertical alignment mode is used to increase the light transmittance and increase the viewing angle. Because the liquid crystal molecules are aligned vertically, when the liquid crystal molecules receive a lower voltage, viewing the display in the direction of squinting will have the problem of grayscale inversion. As a result, a color shift in the squint direction is generated, and the monitor cannot display a normal image.

One method to solve this problem is to form two or more liquid crystal molecule array blocks in the same pixel to form a multi-region vertical alignment liquid crystal display in order to eliminate the problem of grayscale inversion and improve the viewing angle. In practice, there are three specific methods. In the first method, each pixel is divided into a plurality of display regions, and each display region uses capacitive coupling to form different voltages, thereby generating a display effect of a multi-region liquid crystal molecule arrangement. In the second method, each pixel is divided into multiple display areas, and two thin-film transistors are used to make each display area have a different voltage, thereby solving the problem of grayscale inversion. In the third method, each pixel is divided into two or more display regions, and an electron blocking material is covered over a part of the electrodes in the display region, thereby generating a display effect of a multi-region liquid crystal molecule arrangement.

However, these methods using the existing technology to solve the problem of grayscale inversion require complicated liquid crystal display manufacturing processes. In view of the above, the subject of the present invention is to provide a simple electrode structure to drive a liquid crystal display and provide a wider viewing angle, so that the liquid crystal display can present an optimal image.

The present invention provides a liquid crystal display with improved display quality under a wide viewing angle. In order to compensate the characteristics of the voltage and related normalized transmittance (V-T) curve of the LCD in the off-axis direction, each pixel area of the LCD is designed with a self-compensating electrode pattern to widen the viewing angle.

In a preferred embodiment of the present invention, at least two sub-pixel regions in each pixel region of the liquid crystal display have different indium tin oxide or indium zinc oxide electrode patterns. Each sub-pixel area in the pixel area includes at least two electrodes, and each electrode is a solid electrode having a polygonal shape. In other words, the polygon-shaped electrode has no slit gap in its electrode pattern. The two solid electrodes in the sub-pixel area are electrically conductive to each other.

In an example of the present invention, two solid electrodes in each sub-pixel region are connected to each other through an electrode segment to form electrical conduction with each other. The electrode segment and the two solid electrodes are disposed on the same layer. Electrode structure. In another example, the two solid electrodes in each sub-pixel area are also connected to each other through an electrode segment to form electrical conduction with each other, but the electrode segment and the two solid electrodes are disposed on different layers. Electrode structure.

According to an embodiment of the present invention, the electrode pattern in the sub-pixel region may be a specific region in the same electrode layer is removed to form an electrode segment, and the specific removed region is two slits on both sides of the electrode segment, and finally formed The electrode pattern is an electrode segment that connects two solid electrodes. The electrode pattern can be regarded as an "I" shape or an "H" shape.

According to the present invention, the size of the solid electrode in each sub-pixel region is designed in a specific manner so as to compensate the characteristics of the V-T curve of the liquid crystal display in the off-axis direction. If the solid electrode in one sub-pixel region is designed to have a length in the lateral direction, which is longer than in the longitudinal direction, then the corresponding solid electrode in the other sub-pixel region is designed to have a length in the lateral direction, which is longer than Shorter in the longitudinal direction.

In another preferred embodiment of the present invention, each pixel region of the liquid crystal display includes a sub-pixel region in which a self-compensating electrode pattern is formed. The electrode pattern is neither symmetrical to the left or right, and at least an even number of slits are formed on the electrode.

In an example of a preferred embodiment, two slits are formed on an electrode in a sub-pixel region of a pixel region. One of the slits is mostly located in the upper left region of the pixel region, and the other is large. The part is located in the lower right area of the pixel area.

In another example of the preferred embodiment, one of the two slits is mostly located in the upper-right region of the sub-pixel region, and the other slit is mostly located in the lower-left region of the sub-pixel region.

According to the present invention, the extending direction of each slit forms an angle between 0 and 10 degrees with the data line in the pixel region. A preferred angle is that each slit is parallel to the data line. The angle may also be between 15 to 30 degrees between the extending direction of the slit and the data line, and a preferred angle is between 20 to 26 degrees. In the pixel area, each slit can be aligned or misaligned on the same straight line.

Each slit in the sub-pixel region may have an open end in its extending direction, so that the periphery of the electrode in the sub-pixel region has a notch gap formed by the slit. Each slit may also have no open end in its extension direction, so the electrode has a closed periphery without any depression.

In another embodiment of the present invention, each pixel region of the liquid crystal display includes two sub-pixel regions, and each sub-pixel region is formed with a self-compensating electrode pattern. The electrode pattern in each sub-pixel area is neither left-right symmetric nor vertical symmetric, and at least an even number of slits are formed on the electrode.

In an example of a preferred embodiment, two sub-pixel regions have the same electrode pattern. There are two slits formed on the electrodes in each sub-pixel region. One of the slits is mostly located in the upper-left region of the sub-pixel region, and the other slit is mostly located in the lower-right region of the sub-pixel region.

In another example of the preferred embodiment, the two sub-pixel regions have different electrode patterns. Two slits are formed on the electrode in each sub-pixel region. In one sub-pixel region, most of the two slits are respectively located in the upper left region and the lower right region of the sub-pixel region. In another sub-pixel region, the two slits are mostly located in the upper right region and the lower left region of the sub-pixel region, respectively.

In still another example of the preferred embodiment, the two sub-pixel regions also have different electrode patterns. Two slits are formed on an electrode in a sub-pixel region, and most of the two slits are respectively located in an upper left region and a lower right region of the sub pixel region. Four slits are formed on the electrode in the other sub-pixel region. Two of the four slits are mostly located in the upper right region and the lower left region, respectively, and the other two of the four slits are large. Parts are respectively located in the upper left region and the lower right region of the sub-pixel region.

The specification provides drawings to make the present invention more comprehensible, and the drawings also form a part of the specification. The drawings illustrate embodiments of the invention and, together with the description, serve to explain the principles of the invention.

Referring to FIG. 1, a liquid crystal display according to the present invention includes a first substrate 101, a second substrate 102, a first electrode layer 103, a second electrode layer 104, and a liquid crystal layer 105 between the first and second electrode layers. The first and second substrates are opposed to each other, and the liquid crystal layer 105 is disposed between the two substrates. The first and second electrode layers are formed on the first and second substrates by a transparent conductive film such as indium tin oxide or indium zinc oxide.

The liquid crystal molecules in the liquid crystal layer include a nematic liquid crystal material, such as a nematic liquid crystal material having negative dielectric anisotropy. An optically active substance is added to the liquid crystal layer. For example, an optical chiral dopant is added to the liquid crystal layer, so that the liquid crystal molecules are twisted along an axis to have optical chirality, and the axial direction is parallel to the normal line of the first substrate 101. The added optically active substance may be left-handed or right-handed optical chirality. In order to make the liquid crystal molecules have sufficient twisting space, the ratio d / p of the thickness d of the liquid crystal layer to the pitch p of the optical chiral substance is preferably between 0.16 and 0.42.

According to an embodiment of the present invention, each pixel region of a liquid crystal display with a self-compensating electrode pattern includes at least two sub-pixel regions, and each sub-pixel region includes at least two solid electrodes that are electrically conductive with each other. Each solid electrode can be a polygonal electrode, and there is no slit gap inside the solid electrode. The polygon can be triangular, quadrangular, pentagonal, or hexagonal. A preferred embodiment is that there are only two solid electrodes in each sub-pixel area, and each solid electrode is a polygon electrode.

FIG. 2 shows an example of a self-compensating electrode pattern in a pixel region of a liquid crystal display according to the present invention. The pixel area is an area defined by the gate lines 205 and the data lines 206 of the liquid crystal display. Each pixel region includes a sub-pixel 1 'and a sub-pixel 2'. The ratio of the area size of the sub-pixel 1 'area to the area size of the sub-pixel 2' area is preferably between 1/3 and 3/4.

In the region of the sub-pixel 1 ', the electrode 20 1 and the electrode 20 2 are electrically conductive with each other. Similarly, in the region of the sub-pixel 2 ', the electrode 20 3 and the electrode 20 4 are electrically conductive with each other. The vertical reference line 212 passes through the center point of the pixel area and is parallel to the data line 206, and the horizontal reference line 210 passes through the center point of the pixel area and is parallel to the gate line 205.

In order to achieve the purpose of wide viewing angle and improve the display quality of oblique viewing angle, the electrode patterns in the two sub-pixel regions can be designed so that the off-axis V-T curves of the two regions have the characteristics of mutual compensation. For example, if the solid electrode 201 or 202 in the sub-pixel 1 'is designed to have at least one length in the lateral direction than the length in the longitudinal direction, the corresponding solid electrode 203 or 204 in the sub-pixel 2' should be designed to have The length in at least one lateral direction is shorter than the length in the longitudinal direction.

In contrast, if the solid electrode 201 or 202 in the sub-pixel 1 'is designed to have at least one length in the lateral direction that is shorter than the length in the longitudinal direction, the corresponding solid electrode 203 or 204 in the sub-pixel 2' is then It should be designed to have at least one length in the transverse direction that is longer than the length in the longitudinal direction.

The length of at least one side of the solid electrode 201 or 202 in the longitudinal direction is shorter than the length of the solid electrode 203 or 204 in the longitudinal direction. The length of at least one side of the solid electrode 201 or 202 in the lateral direction is longer than the length of the solid electrode 203 or 204 in the lateral direction.

According to the off-axis VT curve characteristics, if the sub-pixel 1 'has a better display quality than the sub-pixel 2' at an angle of view of (θ, φ) = (60, 0), the sub-pixel 2 'is off-axis ( θ, φ) = (60,90) will have better display quality than sub-pixel 1 ', where θ and φ are symbols representing polar and azimuth angles. As a result, as described above, the two sub-pixel regions are designed as solid electrodes with corresponding sizes, which can compensate each other on the off-axis V-T curve, and can improve the off-axis display quality of the liquid crystal display.

In the preferred embodiment shown in FIG. 2, there are two sub-pixel regions in each pixel region. The electrode 201 in the sub-pixel 1 'has the same shape as the electrode 202 in the sub-pixel 1', and the electrode 203 in the sub-pixel 2 'and the electrode 204 in the sub-pixel 2' have the same shape. The electrodes in the pixel area are all rectangular solid electrodes. It should be noted that the electrode 201 and the electrode 202 in the sub-pixel 1 'are electrically connected by electrode segments in the same electrode layer. The electrode 203 and the electrode 204 in the sub-pixel 2 'are also conductively connected by electrode segments in the same electrode layer.

As shown in FIG. 2, the electrodes 201 and 202 in the sub-pixel 1 'each have a horizontal length longer than the vertical length, and the electrodes 203 and 204 in the sub-pixel 2' each have a horizontal length shorter than the vertical length. The entire electrode pattern in the sub-pixel 1 'can be regarded as forming an electrode segment 207 and two slits by removing a specific electrode region on the electrode layer, that is, slit 1 and slit 2. The slit 1 and the slit 2 between the electrode 201 and the electrode 202 have a slit width sw1. The entire electrode pattern in the sub-pixel 1 'can be regarded as a "I" -shaped pattern.

In the example shown in FIG. 2, two specific electrode regions of the sub-pixel 1 'are selectively removed, that is, at least an even number of electrode regions are removed to form an electrode pattern having an even number of slits. The entire electrode pattern in the sub-pixel 1 'uses a vertical reference line 212 as a reference line, and the pattern is a symmetrical figure.

Similarly, the entire electrode pattern in the sub-pixel 2 'can be regarded as forming an electrode segment 208 and two slits by removing a specific electrode region on the electrode layer, that is, slit 3 and slit 4. The slits 3 and 4 between the electrodes 203 and 204 have a slit width sw2. The entire electrode pattern in the sub-pixel 2 'can be regarded as a "H" shaped pattern. sw1 can be less than or equal to sw2. In this example, the slits in the sub-pixel 1 'or the sub-pixel 2' may be formed on the same straight line or different straight lines. In other words, the two slits in the sub-pixel may be misaligned or misaligned. The slit width may also be unequal, and the slit width may be narrower near the center region of the sub-pixel.

In a variation of some embodiments, each pixel region of the liquid crystal display of the present invention may have only one sub-pixel region, that is, only sub-pixel 1 'or sub-pixel 2'. In this case, the electrode pattern in the sub-pixel region is bilaterally symmetrical with respect to the vertical reference line 212. The electrode pattern in the sub-pixel region is symmetrical up and down with respect to the horizontal reference line 210.

Referring to FIG. 2, two slits having a width sw1 in the sub-pixel 1 'are parallel to the horizontal reference line 210. In the present invention, the preferred width sw1 is larger than half the thickness d of the liquid crystal layer, but smaller than twice the thickness d of the liquid crystal layer, that is, 0.5d <sw1 <2d. The two slits having the width sw2 in the sub-pixel 2 'are parallel to the vertical reference line 212. The preferred width sw2 should be greater than half the thickness d of the liquid crystal layer and less than twice the thickness d of the liquid crystal layer. The optimal design is 1.5d <sw2 <2d. For each of the slits described above, its length is L and its width is W. The preferred L should be greater than W, and the most preferred is L> 1.5W.

FIG. 3 shows another example of a self-compensating electrode pattern in a pixel region of a liquid crystal display according to the present invention. In this example, each pixel area is defined by a gate line 205 and a data line 206, including a sub-pixel 1 'and a sub-pixel 2'. In the region of the sub-pixel 1 ', there are two electrodes 301 and 302. Similarly, in the area of the sub-pixel 2 ', there are two electrodes 303 and 304.

As shown in FIG. 3, the electrodes in the pixel area are all rectangular, and the electrodes have a structure and size similar to those of the electrode in FIG. However, the electrical continuity of the electrodes 301 and 302 in the sub-pixel 1 'is an electrical continuity constituted by connecting electrode segments of different electrode layers from the electrodes 301 and 302. The electrical continuity of the electrodes 303 and 304 is also the electrical continuity constituted by connecting the electrode segments with different electrode layers of the electrodes 303 and 304. This electrode segment is not shown in FIG. 3.

FIG. 4 shows an example of a self-compensating electrode pattern 401 formed in each pixel region of a liquid crystal display according to a preferred embodiment of the present invention. The pixel area is an area defined by the gate lines 205 and the data lines 206 of the liquid crystal display. In this embodiment, each pixel region includes only one sub-pixel region, that is, sub-pixel 1 '. The electrode pattern 401 is formed by removing two specific regions of the electrode layer in the sub-pixel region. The electrode pattern 401 is asymmetrical in the left-right and up-down directions.

As shown in FIG. 4, in the pixel region, a vertical reference line 212 passing through the center of the pixel region is parallel to the data line 206, and a horizontal reference line 210 passing through the center of the pixel region is parallel to the gate line 205. The electrode pattern 401 is not symmetrical with respect to the vertical reference line 212 and is not symmetrical with respect to the horizontal reference line 210.

The electrodes in the pixel region are removed by two specific regions to form two slits, as shown in FIG. 4, that is, the slit s41 and the slit s42 have widths sw41 and sw42, respectively. The direction in which each slit extends and the data line 206 has an angle between 0 and 10 degrees. As shown in Figure 4, the preferred angle is 0 degrees. It is preferable that the angle between the slit s41 and the data line 206 is the same as the angle between the slit s42 and the data line 206. However, these two angles can also be different.

In the preferred embodiment shown in FIG. 4, the two slits are parallel to the vertical reference line 212, and the widths sw41 and sw42 may be the same or different. Both of these widths should be larger than the thickness d of the liquid crystal layer, preferably 1.5d <sw41 <2d and 1.5d <sw42 <2d.

FIG. 5 shows another example according to a preferred embodiment of the present invention. A self-compensating electrode pattern 501 is formed in each pixel region in a liquid crystal display. The electrode pattern 501 in this embodiment is similar to the electrode pattern shown in FIG. 4 except that the two slits s51 and s52 have no open ends. In other words, the periphery of the electrode pattern 501 is closed without any depression.

FIG. 6 shows a modification of the self-compensating electrode pattern in the pixel region of the liquid crystal display shown in FIG. 5. In this example, the two slits s61 and s62 in the electrode pattern 601 also have no open ends, and the electrode pattern 601 is similar to FIG. 5, and the periphery is closed without any depression. However, the two slits s61 and s62 are not parallel to the vertical reference line 212. The extending direction of each slit and the data line 206 form an angle between 15 and 30 degrees, and the preferred angle is between 20 and 26 degrees.

As shown in FIG. 6, the pixel region is divided into upper right, lower right, upper left, and lower left regions by vertical and horizontal reference lines 212, 210. It can be seen that most of the slit s61 is located in the upper right region, and most of the slit s62 is located in the lower left region. In the example shown in FIG. 6, the angle between the slit s61 and the material line 206 is the same as the angle between the slit s62 and the material line 206. The two slits s61 and s62 are located on the same straight line. However, the two slits do not have to be located or aligned on the same line.

FIG. 7 illustrates another modification of the self-compensating electrode pattern in the pixel region of the liquid crystal display shown in FIG. 5. In this example, the two slits s71 and s72 in the electrode pattern 701 also have no open ends. Similar to FIG. 5, the electrode pattern has a closed periphery without any depression. Similarly to FIG. 6, the two slits s71 and s72 are also not parallel to the vertical reference line 212. However, the slit s71 is located mostly in the upper left region of the pixel region, and the slit s72 is located mostly in the lower right region of the pixel region.

In the example shown in FIG. 7, the extending direction of each slit and the data line 206 also form an angle between 15 and 30 degrees, and a preferred angle is between 20 and 26 degrees. The angle between the slit s71 and the data line 206 may be the same as the angle between the slit s72 and the data line 206. The two slits s71 and s72 are not aligned on the same straight line. However, the two slits do not have to be on different straight lines or misaligned, and the two slits can also be on the same straight line.

FIG. 8 shows yet another example of a self-compensating electrode pattern formed in a pixel region of a liquid crystal display according to a preferred embodiment of the present invention. In this embodiment, each pixel region includes a sub-pixel 1 'and a sub-pixel 2', and each sub-pixel region is formed with a self-compensating electrode pattern similar to that shown in FIG. 5. As shown in FIG. 8, two sub-pixels have the same electrode patterns 801 and 803.

As shown in FIG. 8, the electrode pattern 801 or 803 in each sub-pixel region has two slits. One of the two slits is mostly located in the upper left region of the sub-pixel region, and the other slit is mostly located in the lower right region of the sub-pixel region. The extending direction of each slit forms an angle between 0 and 10 degrees with the data line 206 in the pixel region. A preferred angle is that each slit is parallel to the data line 206.

FIG. 9 illustrates a modification of a self-compensating electrode pattern in a pixel region of the liquid crystal display of FIG. 8 according to the present invention. In this example, each pixel region also includes a sub-pixel 1 'and a sub-pixel 2'. Sub-pixel 1 'is formed with a self-compensating electrode pattern 901 similar to that shown in FIG. 7, and sub-pixel 2' is formed with a self-compensating electrode pattern 903 similar to that shown in FIG. In other words, the two sub-pixels have different electrode patterns.

As shown in FIG. 9, the electrode pattern 901 in the sub-pixel 1 'is formed with two slits. In the sub-pixel 1 'region, most of the two slits are located in the upper left region and the lower right region of the sub-pixel 1' region, respectively. The electrode pattern 903 in the sub-pixel 2 'is also formed with two slits. In the sub-pixel 2 'region, the two slits are mostly located in the upper right region and the lower left region of the sub-pixel 2' region, respectively.

FIG. 10 illustrates yet another modification of the self-compensating electrode pattern in the pixel region of the liquid crystal display of FIG. 8 according to the present invention. In this example, each pixel region includes a sub-pixel 1 'and a sub-pixel 2'. The sub-pixel 1 'is formed with a self-compensating electrode pattern 1001 similar to that shown in FIG. In the sub-pixel 2 ', the electrode layers in the sub-pixel region are respectively removed from the four specific regions of the upper left, lower right, upper right, and lower left to form four slits, namely, self-compensating electrodes with slits s103, s104, s105, and s106 Pattern 1003.

As shown in FIG. 10, the horizontal reference line 214 passing through the center of the sub-pixel 2 'area is parallel to the gate line 205. The electrode pattern 1003 in the sub-pixel 2' is not symmetrical with respect to the vertical reference line 212, and is relative to the horizontal reference. The line 214 is also not symmetrical up and down. Most of the slits s103 and s104 are located in the upper left and lower right regions of the sub-pixel 2 'region, respectively, and most of the slits s105 and the slot s106 are located in the upper-right region and the lower left region of the sub-pixel 2' region, respectively.

The extending direction of the slit s103 and the data line 206 have an angle between 0 and 10 degrees, and a preferred angle is 0 degrees. The extending direction of the slit s104 and the data line 206 also have an angle between 0 and 10 degrees, and a preferred angle is 0 degrees. It is better that the two angles are the same, but it is not necessary.

As shown in FIG. 10, the extending direction of the slit s105 and the data line 206 have an angle between 15 and 30 degrees, and a preferred angle is between 20 and 26 degrees. The extending direction of the slit s106 and the data line 206 also have an angle between 15 and 30 degrees, and a preferred angle is between 20 and 26 degrees. It is also preferable that the two angles are the same, but it is not necessary. In addition, it is preferable that the width sw103 of the slit s103 is not the same as the width sw106 of the slit s106, but it is not necessary. The width of the slits shown in FIG. 10 is uniform. However, the width of each slit is not necessarily uniform, and the slit width may be narrower in a region closer to the center of the sub-pixel.

Although the present invention is described by only a few preferred embodiments, it is obvious to those familiar with the technical field that there are still many undescribed changes and modifications, all without departing from the definition of the following The invention is within the scope of patent application.

1, 2, 3, 4‧‧‧ slits

1 ’, 2’ ‧‧‧ sub-pixels, sub-pixels

101‧‧‧ the first substrate

102‧‧‧second substrate

103‧‧‧first electrode layer

104‧‧‧Second electrode layer

105‧‧‧LCD layer

201: 202: 203: 204: 301: 302: 303: 304 electrode

205‧‧‧Gate line

206‧‧‧ Data Line

207: 208‧‧‧ electrode segment

210‧‧‧ horizontal reference line

212‧‧‧Vertical Reference Line

214‧‧‧Reference line

401: 501: 601: 701: 801: 803: 901: 903: 1001: 1003‧‧‧ electrode

s41: s42: s51: s52: s61: s62: s71: s72‧‧‧ slit

s101: s102: s103: s104: s105: s106‧‧‧ slit

sw1, sw2‧‧‧ slit width, width

sw41, sw42, sw103, sw106‧‧‧width

FIG. 1 shows a cross-sectional view of a liquid crystal display according to the present invention. FIG. 2 shows an example in which a liquid crystal display according to the present invention forms a self-compensating electrode pattern in each pixel region. FIG. 3 shows another example in which the liquid crystal display according to the present invention forms a self-compensating electrode pattern in each pixel region. FIG. 4 shows an example in which the liquid crystal display according to the present invention forms a self-compensating electrode pattern in one sub-pixel region in each pixel region. FIG. 5 shows a modification of the self-compensating electrode pattern shown in FIG. 4, in which the open ends of the two slits are closed. FIG. 6 shows a modification of the self-compensating electrode pattern shown in FIG. 5, in which the two slits are mostly formed in the upper right region and the lower left region of each pixel region, respectively, and are formed with the data lines in the pixel region. Angle between 15 and 30 degrees. FIG. 7 shows another modification of the self-compensating electrode pattern shown in FIG. 5, in which the two slits are mostly formed in the upper left region and the lower right region of each pixel region, respectively, and are related to the data in the pixel region. The lines form an angle between 15 and 30 degrees. FIG. 8 illustrates an example in which each self-compensating electrode pattern shown in FIG. 5 is formed in two sub-pixel regions of a pixel region in a liquid crystal display according to the present invention. FIG. 9 shows an example of two self-compensating electrode patterns formed in two sub-pixel regions in each pixel region in a liquid crystal display. One of the electrode patterns is similar to the electrode pattern shown in FIG. One electrode pattern is similar to the electrode pattern shown in FIG. 6. FIG. 10 shows an example of two self-compensating electrode patterns formed in two sub-pixel regions in each pixel region in a liquid crystal display. One of the electrode patterns is similar to the electrode pattern shown in FIG. 7. One electrode pattern has four slits.

Claims (15)

A liquid crystal display has a plurality of pixel regions, and each pixel region has at least one sub-pixel region. The at least one sub-pixel region includes a first substrate, and a first electrode layer is formed in the at least one sub-pixel region. A substrate formed with a second electrode layer opposite to the first substrate; and a liquid crystal layer added with an optically active substance disposed between the first and second substrates; wherein in the sub-pixel region In the first electrode layer of the electrode layer, only two specific regions are removed, and only two slits are formed, and the two slits are respectively arranged in four regions separated by vertical and horizontal reference lines passing through the center of the sub-pixel region. Two of these regions constitute the first electrode layer with electrode patterns that are neither symmetrical about the left nor right and right. According to the liquid crystal display of claim 1, the extending direction of each slit has an angle between 0 and 10 degrees with respect to the data line in the pixel region. According to the liquid crystal display of claim 1, each slit is parallel to a data line in a pixel region. The liquid crystal display according to item 1 of the scope of patent application, wherein the extending direction of each slit has an angle between 15 and 30 degrees with respect to the data line in the pixel area. According to the liquid crystal display of claim 1, the slits are aligned on the same straight line. According to the liquid crystal display of claim 1, the slits are not aligned on the same straight line. The liquid crystal display according to item 1 of the scope of patent application, wherein one of the two slits is mostly located in an upper right region of the at least one sub-pixel region, and the other one of the two slits is Most of them are located in the lower left region of the at least one sub-pixel region. The liquid crystal display according to item 1 of the scope of patent application, wherein one of the two slits is mostly located in an upper left region of the at least one sub-pixel region, and the other one of the two slits is Most of them are located in the lower right region of the at least one sub-pixel region. A liquid crystal display has a plurality of pixel regions, each pixel region has at least two sub-pixel regions, and includes: a first substrate formed with a first electrode layer; and a second substrate formed with a second electrode layer. The second substrate is opposite to the first substrate; a liquid crystal layer added with an optically active substance is disposed between the first and second substrates; a first pixel region has a first electrode pattern in the first electrode layer; The first electrode pattern has only two specific regions removed, forming only two slits, and the two slits are respectively disposed in two regions of the four regions separated by vertical and horizontal reference lines passing through the center of the sub-pixel region. The first electrode layer has an electrode pattern that is neither symmetrical or symmetrical; and the second pixel region has a second electrode pattern in the first electrode layer, and the second electrode pattern has at least an even number of slits. And it is neither symmetrical nor symmetrical. The liquid crystal display according to item 9 of the scope of patent application, wherein the extending direction of each slit has an angle between 0 and 10 degrees with respect to the data line in the pixel area. The liquid crystal display according to item 9 of the scope of patent application, wherein the extending direction of each slit has an angle between 15 and 30 degrees with respect to the data line in the pixel area. The liquid crystal display according to item 9 of the scope of patent application, wherein each slit is parallel to a data line in a pixel region. The liquid crystal display according to item 9 of the scope of the patent application, wherein the first electrode pattern has two slits respectively located in an upper left region and a lower right region within the first electrode pattern, and the second electrode pattern has a respective position At least two slits in the upper left region and the lower right region in the second electrode pattern. The liquid crystal display according to item 9 of the scope of the patent application, wherein the first electrode pattern has two slits respectively located in an upper left region and a lower right region within the first electrode pattern, and the second electrode pattern has a respective position At least two slits in the upper right region and the lower left region in the second electrode pattern. The liquid crystal display according to item 14 of the scope of patent application, wherein the second electrode pattern further has at least two slits respectively located in an upper left region and a lower right region within the second electrode pattern, and is located in the second electrode pattern The width of each of the slits in the upper left region and the lower right region is different from the widths of the slits in the upper right region and the lower left region within the above-mentioned second electrode pattern.