CN1959507A - Array substrate - Google Patents

Abstract

An array substrate. The array substrate comprises a substrate, a common electrode and a plurality of pixel structures. Each pixel structure comprises a first pixel electrode, a second pixel electrode and a shielding object. The first pixel electrode has a middle portion, a plurality of first branches connected to the middle portion, and a connection portion. The shielding object is overlapped with at least the middle part of the first pixel electrode; the connecting part is connected with the end parts of at least two adjacent branches in the plurality of first branches; the middle portion is further vertically connected with one of the branches. In addition, the other branch is at least partially overlapped with the shared electrode, and the width of the other branch is larger than or equal to that of the shared electrode. The second pixel electrode is adjacent to the first pixel electrode and has a middle portion and a plurality of second branches connected to the middle portion.

Description

Array substrate

technical field

The present invention relates to an array substrate; in particular, it relates to an array substrate used in a liquid crystal display without the problem of large viewing angle deviation.

Background technique

With the advancement of science and technology, various electronic products have become an indispensable part of people's life. Among them, the display is an important component of multimedia electronic products. The thin film transistor liquid crystal display (thin filmtransistor liquid crystal display, TFT LCD) has the advantages of power saving, no radiation, small size, low power consumption, no space, right angle plane, high resolution, stable image quality, etc. Instead of the traditional cathode ray tube display (CRT display), it is widely used in the display panels of electronic products such as mobile phones, screens, digital TVs, and notebook computers.

With the rapid development of thin film transistor liquid crystal display technology, improving its display quality has become a common goal in this field. In terms of viewing angle width, the multi-domain vertical alignment (MVA) technology developed by Fujitsu extends the vertical viewing angle to about 120°. This technology has greatly improved the viewing angle of liquid crystal displays, which is not inferior to that of cathode ray tube displays Large viewing angle feature.

However, due to the large viewing angle deviation and light leakage when the display using the multi-domain vertical alignment technology is used, and the process is relatively complicated and the manufacturing cost is high, the polymer stable alignment (polymer stable alignment) that improves the defects of the multi-domain vertical alignment technology Stabilized alignment, PSA) technology emerged. The pixel (pixel) design of the polymer stable alignment technology makes the liquid crystal molecules have a fixed pre-tilt angle. When the pixel structure works, the liquid crystal molecules will be deflected with a short response time due to the electric field between the pixel electrode and the common electrode Depending on the desired angle, multiple subregions are formed with different shapes of the pixel electrodes.

However, due to the influence of the irregular distribution of the electric field, the arrangement of the liquid crystal molecules near the adjacent regions of the two pixel structures is not good, and the arrangement of the liquid crystal molecules near the central region of the shared electrode (common line) is also not ideal, as shown in pixel 1 in Figure 1 Circle the area. These unsatisfactory liquid crystals will produce insufficient color washout (color washout), which makes the distribution of bright areas irregular, especially in the viewing angle of the left and right directions. Therefore, although the polymer stabilized alignment technology improves the contrast, brightness and shortens the response time of the thin film transistor liquid crystal display, it still cannot solve the problem of large viewing angle deviation.

To sum up, the existing thin film transistor liquid crystal display has the defect of large viewing angle deviation, and due to the irregular arrangement of the liquid crystal, it affects the bright area and the light leakage occurs, which affects the display quality. Therefore, how to avoid large viewing angle deviation, improve the alignment of liquid crystal molecules, and prevent light leakage is an urgent research topic in the industry.

Contents of the invention

An object of the present invention is to provide an array substrate. The array substrate includes a base material and a plurality of pixel structures. Multiple pixel structures are located on the substrate, and each pixel structure includes a first pixel electrode and a first shield. The first pixel electrode has a middle portion and a plurality of branches connected to the middle portion, and the first shield at least overlaps with the middle portion of the first pixel electrode.

Another object of the present invention is to provide an array substrate. The array substrate includes a base material and a plurality of pixel structures. A plurality of pixel structures are located on the substrate, and each pixel structure includes a first pixel electrode and a second pixel electrode. The first pixel electrode has a middle part, a plurality of branches and a first connecting part. Multiple branches are connected to the middle part; the first connecting part is connected to one end of at least two adjacent branches of the first pixel electrode, wherein the first connecting part is substantially perpendicular to the middle part of the first pixel electrode. The second pixel electrode is adjacent to the first pixel electrode and has a middle part and a plurality of branches connected to the middle part.

Another object of the present invention is to provide an array substrate. The array substrate includes a base material, a first common electrode and a plurality of pixel structures. The first shared electrode is located on the substrate, and multiple pixel structures are also located on the substrate. Each pixel structure includes a first pixel electrode, the first pixel electrode has a middle part and a first branch, and the first branch is vertically connected to the middle part. The first branch of the first pixel electrode at least partially overlaps with the first shared electrode, and the width of the first branch of the first pixel electrode is greater than or equal to the width of the first shared electrode.

Through the above arrangement, the present invention can not only improve the color shift phenomenon at large viewing angles, but also obtain ideal liquid crystal alignment, avoid light leakage, and obtain better display quality.

After referring to the accompanying drawings and the implementation methods described later, those skilled in the art can understand other objectives of the present invention, as well as the technical means and implementation aspects of the present invention.

Description of drawings

FIG. 1 is a display diagram of a pixel electrode of an existing liquid crystal display;

2 is a top view of a pixel electrode according to the first embodiment of the present invention;

Fig. 3 is a sectional view of section lines 2a-2a' in the pixel electrode of Fig. 2;

4A is a schematic diagram of the coupling of thin film transistors according to the first embodiment of the present invention;

4B is a schematic diagram of another thin film transistor coupling of the present invention;

5 is a top view of a pixel electrode according to a second embodiment of the present invention;

6 is a top view of a pixel electrode according to a third embodiment of the present invention;

Fig. 7 is a sectional view of the section line 6a-6a' in the pixel electrode of Fig. 6; and

FIG. 8 is a top view of a pixel electrode according to a fourth embodiment of the present invention.

Description of main component symbols:

1: pixel

2: Pixel structure

20: Shared electrodes

21: scan line

22: data line

23: The first pixel electrode

231: First middle part

233: Multiple branches

24: Second pixel electrode

241: Second middle part

243: Multiple branches

25: First wire

26: Second wire

27: The first thin film transistor

28: Second thin film transistor

29: Liquid crystal layer

5: Pixel structure

51: scan line

52: data line

53: first pixel electrode

531: First middle part

533: Multiple branches

535: The first connecting part

537: First Auxiliary Connection

537': first auxiliary connection

54: Second pixel electrode

541: Second middle part

543: Multiple branches

545: Second connection part

547: Second Auxiliary Connection

547': Second Auxiliary Connection

55: The first thin film transistor

56: Second thin film transistor

6: Pixel structure

60: Substrate

61: scan line

62: data line

63: the first pixel electrode

631: First middle part

633: First branch

64: Second pixel electrode

641: Second middle part

643: Second branch

65: First shared electrode

66: Second shared electrode

69: Liquid crystal layer

8: Pixel structure

801: first shared electrode

802: second shared electrode

81: scan line

82: data line

83: the first pixel electrode

831: First Intermediate Section

833: First master branch

835: Multiple first sub-branches

837: The first connecting part

839: First Auxiliary Connection

84: Second pixel electrode

841: Second middle part

843: Second master branch

845: Multiple second subbranches

847: Second connection part

849: Second Auxiliary Connection

85: First wire

86: Second wire

Detailed ways

The invention uses polymer stable alignment technology to change the pixel structure in the array substrate to improve the alignment direction of liquid crystals, which not only avoids light leakage, but also solves the color shift problem of large viewing angles. The details of the present invention will be described later.

The invention discloses an array substrate used in a thin film transistor liquid crystal display. The array substrate includes a base material and a plurality of pixel structures on the base material.

The first embodiment of the present invention is shown in FIG. 2 and FIG. 3 . In this embodiment, a pixel structure 2 includes a shared electrode 20, a scan line 21, a data line 22, a first pixel electrode 23, a second pixel electrode 24, a first shield, a second shield objects, a first switch and a second switch. The first shield is a first wire 25, which can be electrically connected to the first pixel electrode 23; the second shield is a second wire 26; the first wire 25 and a second wire 26 are connected to the first The thin film transistor 27 is electrically connected, the first thin film transistor 27 is used to control the first pixel electrode 23, the first wire 25 and a second wire 26 can be formed at the same time; the first switch and the second switch are respectively a first thin film transistor 27 and a second thin film transistor 28 , the content of Taiwan Patent Application No. 95129118 is incorporated herein by reference.

Referring to FIG. 2 and FIG. 3 at the same time, FIG. 2 is a top view of the pixel structure 2 according to the first embodiment of the present invention, and FIG. 3 is a cross-sectional view of the pixel structure 2 along line 2a-2a'. As shown in FIG. 2 , the scan line 21 is used to transmit a scan signal, and the data line 22 is used to transmit a voltage signal.

The first pixel electrode 23 has a first middle portion 231 and a plurality of branches 233, and the plurality of branches 233 are connected to the first middle portion 231. , 220° to 230° and 310° to 320° extend in angle directions with the first middle portion 231, more preferably extend in four angle directions of 45°, 135°, 225° and 315°, and partly A plurality of branches 233 forming the same included angle in the first middle portion 231 are parallel to each other, so the first pixel electrode 23 can be divided into four subregions according to the branching directions. The first conducting wire 25 as a shield partially overlaps with the first middle portion 231 and the plurality of branches 233 .

Similarly, the second pixel electrode 24 has a second middle portion 241 and a plurality of branches 243, and the plurality of branches 243 are connected to the second middle portion 241, and extend in four directions, and form the same clip with the second middle portion 241. The multiple branches 243 at the corners are parallel to each other, so the second pixel electrode 24 can be divided into four sub-regions according to the direction of the branches. The second wire 26 serving as a shield overlaps the second middle portion 241 and part of the plurality of branches 243 ; in this embodiment, the first wire 25 and the second wire 26 can be metal materials.

In the first embodiment, the first thin film transistor 27 and the second thin film transistor 28 are electrically coupled, and the first thin film transistor 27 is a transistor with a weaker charging capability than the second thin film transistor 28. The electrical coupling method is shown in the figure 4A. One end of the source/drain of the first thin film transistor 27 is electrically connected to the first pixel electrode 23, the other end is connected to the data line 22, and the gate of the first thin film transistor 27 is connected to the scanning line 21, so the first thin film transistor 27 is a switch of the pixel structure, which is turned on in response to the scan signal to conduct and transmit a voltage signal to the first pixel electrode 23 to drive the corresponding display area. One end of the source/drain of the second thin film transistor 28 is electrically connected to the second pixel electrode 24, the other end is connected to the data line 22, and the gate of the second thin film transistor 28 is connected to the scan line 21, so the second thin film transistor 28 is a switch of the pixel structure, which is turned on in response to the scan signal to conduct and transmit a voltage signal to the second pixel electrode 24 to drive the corresponding display area. Moreover, the first thin film transistor 27 can release the charge accumulated in the first pixel electrode 23 through the data line 22 to prevent image sticking on the first pixel electrode 23 due to charge accumulation.

In the first embodiment, the first pixel electrode 23 and the second pixel electrode 24 of the pixel structure 2 are independent of each other, so the potentials of the two pixel electrodes can be different, so that the liquid crystal layer 29 distributed on the corresponding two pixel electrodes is affected by two different types. Influenced by the intensity of the electric field, different liquid crystal arrangements are presented, and the two pixel electrodes each have four domains, so a pixel structure 2 has eight liquid crystal domains. Due to the increase in the number of domains, the situation of biased roles can be greatly improved. In the present invention, the first wire 25 or the second wire 26 is extended to the middle part of the two pixel electrodes to cover the middle part, reduce light leakage and improve the shape of the bright area.

The above-mentioned first embodiment is only used to illustrate an aspect of the present invention. In other implementation aspects, a black matrix (black matrix, BM) can also be used as a shield. When using a black matrix as a shield, set the black matrix on the substrate. For example, the first shielding object can be a black matrix or a wire, and the second shielding object can also be a black matrix or a wire; the black matrix or wire can only overlap with the first or second middle part, and not overlap with multiple The branches overlap; the shapes of the two pixel electrodes in the pixel structure 2 can be different, and each pixel structure is not limited to include two pixel electrodes; the electrical coupling of the thin film transistors can also be as shown in FIG. 4B .

The second embodiment of the present invention is shown in FIG. 5 . In this embodiment, a pixel structure 5 includes a scan line 51, a data line 52, a first pixel electrode 53, a second pixel electrode 54, a first switch and a second switch, wherein the first switch and The second switches are a first thin film transistor 55 and a second thin film transistor 56 respectively. The scan line 51 is used to transmit a scan signal, and the data line 52 is used to transmit a voltage signal.

The first pixel electrode 53 has a first intermediate portion 531, a plurality of branches 533, a first connecting portion 535 and a first auxiliary connecting portion 537, 537′, the first connecting portion 535 and the first auxiliary connecting portion 537 may be To connect or not to connect. A plurality of branches 533 are connected to the first middle part 531, and the plurality of branches 533 are preferably connected to the first middle part 531 at angles of 40°-50°, 130°-140°, 220°-230° and 310°-320°. Extending in the direction of the included angle, more preferably extending in four directions of included angles of 45°, 135°, 225° and 315°, and the multiple branches 533 forming the same angle with the first middle part 531 are parallel to each other, so the first The pixel electrode 53 can be divided into four sub-regions according to the branching direction.

The first connecting portion 535 is connected to one end of at least two adjacent branches of the first pixel electrode 53 , and the number of the first connecting portion 535 can be multiple, wherein the first connecting portion 535 is connected to the first middle portion of the first pixel electrode 53 531 is substantially vertical. The first auxiliary connection part 537 is connected to one end of at least two other adjacent branches of the first pixel electrode 53, wherein the first auxiliary connection part 537 is not substantially perpendicular to the first middle part 531. In this embodiment, the first The auxiliary connecting portion 537 is in the shape of a folded line, one end of the folded line is substantially parallel to the first middle portion 531 , and the extension line of the other end is substantially at an acute angle with the first middle portion 531 . In addition, the first auxiliary connecting part 537' can be arranged substantially parallel to the first middle part 531, connecting one end of the adjacent branch of the part, and the number of the first auxiliary connecting part 537' can be single or multiple, as shown in Figure 5 shown.

Similarly, the second pixel electrode 54 has a second middle part 541, a plurality of branches 543, a second connecting part 545 and a second auxiliary connecting part 547, 547', the second connecting part 545 and the second auxiliary connecting part 547 may be connected or not connected. The second pixel electrode 54 is adjacent to the first pixel electrode 53, and the multiple branches 543 are connected to the second middle part 541. °, 220°-230°, and 310°-320°, more preferably four angles of 45°, 135°, 225°, and 315°, and formed with the second middle part 541 A plurality of branches 543 with the same included angle are parallel to each other, so the second pixel electrode 54 can be divided into four sub-regions according to the direction of the branches.

The second connecting portion 545 connects one end of at least two adjacent branches of the second pixel electrode 54 , and the number of the second connecting portion 545 can be multiple, wherein the second connecting portion 545 is connected to the second middle portion of the second pixel electrode 54 541 is substantially vertical. The second auxiliary connecting portion 547 is connected to one end of at least two adjacent branches of the second pixel electrode 54, wherein the second auxiliary connecting portion 547 is not substantially perpendicular to the second middle portion 541. In this embodiment, the second The auxiliary connecting portion 547 is in the shape of a folded line. One end of the folded line is substantially parallel to the second middle portion 541 , and the extension line of the other end is substantially at an angle with the second middle portion 541 . In addition, the second auxiliary connecting portion 547' can be arranged substantially parallel to the second middle portion 541, and the connecting portion is connected to an end portion of an adjacent branch, and the number of the second auxiliary connecting portion 547' can be single or multiple.

Preferably, in the first pixel electrode 53, the adjacent branches connected by the first connection portion 535 and the first auxiliary connection portion 537 correspond to the second pixel electrode 54, which is connected by the second connection portion 545 and a second auxiliary connection. Adjacent branches connected by section 547.

The first thin film transistor 55 is electrically connected to the first pixel electrode 53; the second thin film transistor 56 is electrically connected to the second pixel electrode 54, wherein the first thin film transistor 55 and the second thin film transistor 56 are electrically coupled, and their electrical The sexual coupling method can be the same as that of the first embodiment, so it will not be repeated here.

In the second embodiment, the first pixel electrode 53 and the second pixel electrode 54 in the pixel structure 5 are independent of each other, so the potentials of the two pixel electrodes can be different, so that the liquid crystal layer distributed on the corresponding two pixel electrodes is subjected to two different intensities. Influenced by the electric field, different liquid crystal arrangements are presented, and therefore the two pixel electrodes each have four sub-domains, so one pixel structure 5 has eight liquid crystal sub-domains. Due to the increase in the number of domains, the situation of biased roles can be greatly improved.

In the second embodiment, the potentials of the first connection portion 535 and the first auxiliary connection portion 537 of the first pixel electrode 53 and the second connection portion 545 of the second pixel electrode 54 and a second auxiliary connection portion 547 are adjusted to make the two The liquid crystal molecules between the pixel electrodes can be arranged regularly, avoiding the problems of insufficient color saturation and large viewing angle deviation.

The above-mentioned second embodiment is only used to illustrate one aspect of the present invention. In other implementation aspects, all the multiple branches of the first pixel electrode can be connected through the first connection part and the first auxiliary connection part, and the second pixel electrode All the multiple branches of the electrode can also be connected through the second connecting part and the second auxiliary connecting part; the first auxiliary connecting part and the second auxiliary connecting part can be straight bars parallel to the first and second middle parts, or the second The first auxiliary connecting part and the second auxiliary connecting part can be straight, and the extension line forms an included angle with the first and second middle parts.

The present invention also discloses an array substrate, which is also used in a thin film transistor liquid crystal display. The array substrate includes a base material, a first shared electrode, a second shared electrode and a plurality of pixel structures. Both the first shared electrode and the second shared electrode are located on the substrate, and a plurality of pixel structures are also disposed on the substrate.

The third embodiment of the present invention is shown in FIG. 6 and FIG. 7, wherein FIG. 6 is a top view of the pixel structure 6 of the third embodiment of the present invention, and FIG. 7 is a cross-section of the pixel structure 6 along the line 6a-6a' picture. In this embodiment, a pixel structure 6 includes a scan line 61 , a data line 62 , a first pixel electrode 63 and a second pixel electrode 64 . The first pixel electrode 63 has a first middle portion 631 and a first branch 633 , and the first branch 633 is vertically connected to the first middle portion 631 . The first branch 633 of the first pixel electrode 63 at least partially overlaps the first common electrode 65 , and the width of the first branch 633 of the first pixel electrode 63 extends beyond at least one side of the first common electrode 65 by about 0 to 4 micrometers.

The second pixel electrode 64 has a second middle portion 641 and a second branch 643 , and the second branch 643 is vertically connected to the second middle portion 641 . The second branch 643 of the second pixel electrode 64 at least partially overlaps the second common electrode 66 , and the width of the second branch 643 of the second pixel electrode 64 extends about 0 to 4 μm beyond at least one side of the second common electrode 66 .

The first pixel electrode 63 and the second pixel electrode 64 in the pixel structure 6 of the present invention are independent of each other, so the potentials of the two pixel electrodes can be different, so that the liquid crystal layer 69 distributed on the corresponding two pixel electrodes is subjected to two kinds of electric fields with different intensities Influenced by different liquid crystal arrangements, and therefore the two pixel electrodes each have four sub-domains, so one pixel structure 6 has eight liquid crystal sub-domains. In the present invention, the branch of the pixel electrode covers the common electrode to avoid light leakage from the pixel structure 6 in a shielding manner.

The above-mentioned third embodiment is only used to illustrate one aspect of the present invention. In other implementation aspects, the width of the first branch can also be equal to the width of the first shared electrode, or the width of the second branch can be equal to the width of the second shared electrode The width; the difference between the width of the first branch of the first pixel electrode and the width of the first common electrode may be about 0 microns to 8 microns.

The invention further discloses an array substrate used in a thin film transistor liquid crystal display. The array substrate includes a base material, a first shared electrode, a second shared electrode and a plurality of pixel structures. Both the first shared electrode and the second shared electrode are located on the substrate, and a plurality of pixel structures are also disposed on the substrate.

A fourth embodiment of the present invention is shown in FIG. 8 . FIG. 8 is a fourth embodiment of the present invention, which shows a top view of a pixel structure 8 . In this embodiment, a pixel structure 8 includes a scan line 81, a data line 82, a first pixel electrode 83, a second pixel electrode 84, a first shield, a second shield, a first switch and a second switch. The scan line 81 is used to transmit a scan signal, and the data line 82 is used to transmit a voltage signal. The first shield is a first wire 85 electrically connected to the first pixel electrode 83; the second shield is a second wire 86, and the configuration of the first wire 85 and the second wire 86 is substantially the same as that of the first embodiment , which will not be repeated here; the first switch and the second switch are a first thin film transistor 87 and a second thin film transistor 88 respectively.

The first pixel electrode 83 has a first middle portion 831, a first branch 833, a plurality of first sub-branches 835, a first connection portion 837 and a first auxiliary connection portion 839, the number of the first connection portion 837 can be There are multiple, the first connecting portion 837 and the first auxiliary connecting portion 839 may be connected or not. The first branch 833 is vertically connected to the first middle portion 831 and at least partially overlaps with the first shared electrode 801, and the width of the first branch 833 of the first pixel electrode 83 is greater than the width of the first shared electrode 801 by about 0 to 8 microns .

A plurality of first sub-branches 835 are connected to the first middle part 831, and the plurality of first sub-branches 835 are preferably connected to the first middle part 831 at angles of 40°-50°, 130°-140°, 220°-230° and 310°-320° in the direction of the angle, more preferably a plurality of sub-branches 835 extending in four angles of 45°, 135°, 225° and 315° and forming the same angle with the first middle part 831 are parallel to each other, so the first pixel electrode 83 can be divided into four sub-regions according to the branching directions. The first wire 85 as a shield overlaps the first middle portion 831 and part of the plurality of first sub-branches 835 . As shown in FIG. 8 , the first wire 85 may be cross-shaped, overlapping with the first middle portion 831 and part of the plurality of first sub-branches 835 .

The first connecting portion 837 connects one ends of at least two adjacent branches of the plurality of first sub-branches 835 , wherein the first connecting portion 837 is substantially perpendicular to the first middle portion 831 of the first pixel electrode 83 . The first auxiliary connecting portion 839 is connected to one end of at least two other adjacent branches of the first pixel electrode 83, wherein the first auxiliary connecting portion 839 is not substantially perpendicular to the first intermediate portion 831. In this embodiment, the first The auxiliary connecting portion 839 is in the shape of a folded line, one end of the folded line is substantially parallel to the first middle portion 831 , and the extension line of the other end is substantially at an acute angle with the first middle portion 831 .

The second pixel electrode 84 has a second middle portion 841 , a second branch 843 , a plurality of second sub-branches 845 , a second connection portion 847 and a second auxiliary connection portion 849 . The second branch 843 is vertically connected to the second middle portion 841 and at least partially overlaps with the second shared electrode 802, and the width of the second branch 843 of the second pixel electrode 84 is about 0 to 4 microns larger than the width of the second shared electrode 802 .

A plurality of second sub-branches 845 are connected to the second middle part 841, and the plurality of branches are preferably connected to the second middle part 841 at angles of 40°-50°, 130°-140°, 220°-230° and 310°-320°. ° extending in the direction of the included angle, more preferably extending in the direction of four included angles of 45°, 135°, 225° and 315°, and the plurality of sub-branches 845 forming the same angle with the second middle part 841 are parallel to each other, so The second pixel electrode 84 can be divided into four sub-regions according to the branching direction. The second wire 86 serving as a shield partially overlaps the second middle portion 841 and the plurality of second sub-branches 845 ; in this embodiment, the first wire 85 or the second wire 86 can be a metal material.

The second connecting portion 847 connects one ends of at least two adjacent branches of the plurality of second sub-branches 845 , wherein the second connecting portion 847 is substantially perpendicular to the second middle portion 841 of the second pixel electrode 84 . The second auxiliary connecting portion 849 is connected to one end of at least two other adjacent branches of the second pixel electrode 84, wherein the second auxiliary connecting portion 849 is not substantially perpendicular to the second middle portion 841. In this embodiment, the second The auxiliary connecting portion 849 is in the shape of a folded line. One end of the folded line is substantially parallel to the second middle portion 841 , and the extension line of the other end is substantially at an acute angle with the second middle portion 841 .

The first thin film transistor 87 is electrically connected to the first pixel electrode 83; the second thin film transistor 88 is electrically connected to the second pixel electrode 84, wherein the first thin film transistor 87 and the second thin film transistor 88 are electrically coupled. The sexual coupling method can be the same as that of the first embodiment, so it will not be repeated here.

The first pixel electrode 83 and the second pixel electrode 84 in the pixel structure 8 are independent of each other, so the potentials of the two pixel electrodes are different, so that the liquid crystal layer distributed on the corresponding two pixel electrodes is affected by two kinds of electric fields with different intensities, showing different liquid crystals. arrangement, and therefore each of the two pixel electrodes has four domains, so a pixel structure 8 has eight liquid crystal domains.

The present invention extends the middle part of each pixel electrode through a shield to cover the middle part and covers the shared electrode through the branch of the pixel electrode, so as to avoid light leakage of the pixel structure in a shielding manner and improve the shape of the bright area. In addition, the present invention further adjusts the potentials of the connection part and the auxiliary connection part to make the liquid crystal molecules between the two pixel electrodes regularly arranged, avoiding problems such as insufficient color saturation and large viewing angle deviation.

The above fourth embodiment is only used to illustrate one aspect of the present invention. In other implementation aspects, the structures of the two pixel electrodes can be different, for example, the structure of the pixel electrodes in the above four embodiments can be used. At the same time, each pixel structure can also use different pixel structures in the aforementioned four embodiments.

The above-mentioned embodiments are only illustrative to illustrate the principles and effects of the present invention, and are not intended to limit the present invention. Anyone skilled in the art can modify and change the above-mentioned embodiments without violating the technical principle and spirit of the present invention. Therefore, the protection scope of the present invention should be as listed in the claims.

Claims (12)

1. An array substrate, comprising: a substrate; and A plurality of pixel structures are located on the substrate, each pixel structure includes: a first pixel electrode having a middle portion and a plurality of branches connected to the middle portion; and A first shield at least overlaps with the middle portion of the first pixel electrode. 2. The array substrate according to claim 1, wherein each pixel structure further comprises: a second pixel electrode having a middle portion and a plurality of branches connected to the middle portion; and A second shield at least overlaps with the middle portion of the second pixel electrode. 3. The array substrate according to claim 2, wherein each pixel structure further comprises: a first switch electrically connected to the first pixel electrode; and A second switch is electrically connected to the second pixel electrode, wherein the second switch and the first switch are electrically coupled. 4 . The array substrate according to claim 1 , wherein the first shield further overlaps part of the plurality of branches of the first pixel electrode. 5. The array substrate according to claim 1, wherein the first mask comprises a black matrix disposed on the substrate. 6 . The array substrate according to claim 1 , wherein the first shield comprises a wire electrically connected to the first pixel electrode. 7 . The array substrate according to claim 1 , wherein the first pixel electrode further comprises a first connection portion connecting one ends of at least two adjacent branches of the first pixel electrode. 8. The array substrate according to claim 7, wherein each pixel structure further comprises a second pixel electrode having a middle portion, a plurality of branches connected to the middle portion, and a second connection portion , connecting one end portions of at least two adjacent branches of the second pixel electrode, wherein the second connection portion is substantially perpendicular to the middle portion of the second pixel electrode. 9. The array substrate according to claim 7, wherein the first pixel electrode further has a first auxiliary connecting portion connecting one end of at least two other adjacent branches of the first pixel electrode, wherein The first auxiliary connection portion is not perpendicular to the middle portion of the first pixel electrode. 10. The array substrate according to claim 7, further comprising: A first shared electrode is located on the substrate, wherein the first pixel electrode further includes a width of a first branch greater than or equal to the width of the first shared electrode. 11 . The array substrate according to claim 10 , wherein, where the first branch of the first pixel electrode overlaps with the first shared electrode, the width of the first branch is the same as the width of the first shared electrode. The difference is 0 to 8 microns. 12. The array substrate according to claim 1, further comprising: A first shared electrode is located on the substrate, wherein the first pixel electrode further includes a width of a first branch greater than or equal to the width of the first shared electrode.

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