TWI453514B - Fringe field switching mode liquid crystal display - Google Patents

Description

Edge electric field switch type liquid crystal display device

The present invention relates to a liquid crystal display device, and more particularly to a fringe field switching type LCD (FFS-LCD) having a high transmittance.

At present, the use of liquid crystal displays (LCDs) has become a trend. Liquid crystal displays have superior features such as high image quality, better space utilization, low power consumption, and no radiation. With the maturity of liquid crystal display technology, liquid crystal displays are also widely used. Application to various fields. In a conventional twisted nematic liquid crystal display (TN-LCD), a pixel electrode is disposed on a first substrate, and a common electrode is disposed on the second substrate, and a liquid crystal layer is disposed between the first substrate and the second substrate Applying voltage to the pixel electrode and the common electrode controls the rotation of the liquid crystal molecules in the liquid layer to realize the screen display; however, the TN-LCD is disadvantageous for application to a large-sized liquid crystal display due to the defect of narrow viewing angle.

In recent years, a transverse electric field type liquid crystal display (IPS-LCD) technology having a wide viewing angle characteristic has been proposed. The pixel electrode and the common electrode in the IPS-LCD are both disposed on the first substrate, and the pixel electrode and the common electrode are the same. The plane is staggered in the form of comb electrodes; because IPS-LCD has a wide viewing angle display, it is more widely used in large-size liquid crystal displays, but the traditional IPS-LCD has the disadvantage of low light transmittance, affecting The screen display of the LCD monitor.

In view of this, an improved liquid crystal display technology of IPS-LCD has been proposed, that is, a fringe field switching liquid crystal display (FFS-LCD). 1 is a schematic cross-sectional view of a prior art FFS-LCD. The first substrate 11 and the second substrate 12 are disposed corresponding to each other, and the liquid crystal layer 13 is disposed between the first substrate 11 and the second substrate 12, the common electrode 14 and the pixel electrode. 16 is disposed on the first substrate 11, and the insulating layer 15 is disposed between the common electrode 14 and the pixel electrode 16; the FFS-LCD is characterized in that the gap between the adjacent common electrode 14 and the pixel electrode 16 can be shortened. The distance between the adjacent common electrode 14 and the pixel electrode 16 is smaller than the width of the common electrode 14 or the pixel electrode 16, and is also smaller than the distance between the first substrate 11 and the second substrate 12, and the common electrode 14 and The pixel electrodes 16 are all made of a transparent conductive material, so that a very uniform electric field can be obtained in the entire liquid crystal layer to effectively increase the light transmittance, but the design of the electrode structure is prone to color defect defects. . The structure of the existing FFS-LCD has been disclosed in US Pat. No. 6,466,290 and US Pat.

Figure 2 is a top plan view of a prior art FFS-LCD electrode structure. In the FFS-LCD electrode structure shown in FIG. 2, the gate line 21 and the data line 22 are alternately arranged on the first substrate 20, and the pixel region 23 is formed by interlacing the gate line 21 and the data line 22, and the common electrode 24 has an approximately rectangular shape disposed in the pixel region 23, and the pixel electrode 25 and the common electrode 24 are partially overlapped in the pixel region 23, and the pixel electrode 25 is a circular ring structure, and the thin film transistor 26 At the intersection of the gate line 21 and the data line 22, the pixel electrode 25 is connected to the thin film transistor 26 through the connection electrode 27. In the pixel electrode structure of the FFS-LCD, due to the design of the circular shape of the pixel electrode, a wider viewing angle range can be obtained, and the generation of color shift defects can be overcome; however, the pixel electrode 25 has a ring shape. There are also some drawbacks in the design that the four corners A of the pixel area 23 are only provided with the common electrode 24 and no pixel electrode 25 is provided, and in the case of applying a voltage, the liquid crystal molecules located at the corner A of the pixel area 23 Can't get The effective control produces liquid crystal alignment disorder, resulting in uneven brightness display, especially the low gray scale dark state display bright defect, so that the display quality of the liquid crystal display is degraded.

The invention provides a fringe field switching type liquid crystal display device, which can solve the problem of disorder of liquid crystal alignment in the prior art, and effectively control the alignment of liquid crystal molecules.

The edge electric field switch type liquid crystal display device of the invention can obtain uniform brightness display, improve defects of low gray scale dark state display brightness, and improve display quality of the liquid crystal display device.

In order to achieve the above object, in an embodiment of the present invention, the edge electric field switching type liquid crystal display device includes a first substrate, and a gate line and a data line are disposed on the substrate to form a pixel region, and the thin film transistor is formed. And disposed on the first substrate, wherein the common current is disposed in the pixel region in an approximately square or approximately rectangular shape, and the pixel electrode is disposed on the common electrode and overlaps the common electrode portion, wherein the pixel electrode is overlapped with the common electrode. The pixel electrode is connected to the thin film transistor, the pixel electrode compensation structure is disposed in the non-overlapping region of the pixel electrode and the common electrode, and the pixel electrode compensation structure is connected to the pixel electrode, and the second substrate is disposed corresponding to the first substrate, and the liquid crystal is The layer is disposed between the first substrate and the second substrate.

In an embodiment of the present invention, the pixel electrode compensation structure of the edge electric field switch type liquid crystal display device further includes a pixel compensation electrode and a connection electrode.

In an embodiment of the invention, the pixel compensation electrode of the edge electric field switch type liquid crystal display device is an arc electrode or a strip electrode.

In an embodiment of the present invention, the edge electric field switching type liquid crystal display device Both the pixel compensation electrode and the connection electrode are transparent electrodes.

In an embodiment of the present invention, the pixel electrode of the edge electric field switching type liquid crystal display device includes a plurality of electrode patterns, and the electrode patterns are concentric rings having different sizes, and the concentric rings are not limited to concentric rings. It can be a concentric diamond ring or other concentric ring structure.

In an embodiment of the invention, the electrode pattern of the edge electric field switch type liquid crystal display device is circular or diamond shaped.

In another embodiment of the present invention, the edge electric field switching type liquid crystal display device includes a first substrate, and the gate lines and the data lines are disposed on the substrate to form a pixel region, and the thin film transistor is disposed at the first On the substrate, wherein the pixel electrode is disposed in the pixel region and is connected to the thin film transistor in an approximately square or approximately rectangular shape, the common current is substantially an annular opening structure disposed on the pixel electrode and the pixel electrode The liquid crystal layer is disposed between the first substrate and the second substrate. The second substrate is disposed outside the annular opening of the common electrode, and the second substrate is disposed corresponding to the first substrate, and the liquid crystal layer is disposed between the first substrate and the second substrate.

In another embodiment of the present invention, the edge electric field switching type liquid crystal display device common electrode compensation structure includes a plurality of openings.

In another embodiment of the present invention, the edge electric field switching type liquid crystal display device includes a first substrate, and the gate lines and the data lines are disposed on the substrate to form a pixel region, and the thin film transistor is disposed at the first On the substrate, wherein the common current is substantially in the shape of an approximately square or approximately rectangular shape disposed in the pixel region, the pixel electrode is disposed on the common electrode and partially overlaps the common electrode, and the pixel electrode is The thin film transistors are connected, and the pixel electrode compensation structure is disposed on the pixel electrodes and is common The electrode non-overlapping region, wherein the pixel electrode compensation structure is connected to the pixel electrode, a second substrate is disposed corresponding to the first substrate, and the liquid crystal layer is disposed between the first substrate and the second substrate.

In another embodiment of the present invention, the edge electric field switching type liquid crystal display device includes a first substrate, and the gate lines and the data lines are disposed on the substrate to form a pixel region, and the thin film transistor is disposed at the first On the substrate, wherein the pixel electrode is in an approximately square or approximately rectangular shape and is disposed in the pixel region and connected to the thin film transistor; the common current is a spiral opening structure disposed on the pixel electrode and the pixel electrode The liquid crystal layer is disposed between the first substrate and the second substrate. The second substrate is disposed outside the spiral opening of the common electrode, and the second substrate is disposed between the first substrate and the second substrate.

30, 50, 60, 70, 80‧‧‧ first substrate

31, 51, 61, 71, 81‧‧ ‧ gate line

32, 52, 62, 72, 82‧‧‧ data lines

33, 53, 63, 75, 85‧‧‧ common electrodes

34, 54, 64, 74, 84‧‧‧ film transistors

35, 55, 65, 73, 83 ‧ ‧ pixel electrodes

36, 56‧‧‧ pixel connection electrode

351, 352, 353, 551, 552, 553‧‧‧ electrode patterns

37, 57, 67, 77, 87‧‧‧ pixel element compensation structure

371, 372, 471, 472, 571, 572, 671, 672 ‧ ‧ pixel compensation electrodes

373, 573, 673 ‧ ‧ connecting electrodes

751‧‧‧Circular opening

851‧‧‧Spiral opening

871, 872‧‧‧ curved opening

1 is a schematic cross-sectional view of a prior art FFS-LCD; FIG. 2 is a top plan view of a prior art FFS-LCD electrode structure; and FIG. 3 is a top plan view of an FFS-LCD electrode structure according to a first embodiment of the present invention; 4 is a top plan view of an FFS-LCD electrode structure according to a first embodiment of the present invention; FIG. 5 is a top plan view of an FFS-LCD electrode structure according to a second embodiment of the present invention; FIG. 7 is a top plan view showing an FFS-LCD electrode structure according to a fourth embodiment of the present invention; and FIG. 8 is a plan view showing an FFS-LCD electrode structure according to a fifth embodiment of the present invention. schematic diagram.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described more fully hereinafter with reference to the accompanying drawings in which preferred embodiments of the invention are illustrated. However, the invention may be embodied in different forms and should not be construed as being limited to the embodiments set forth herein. However, the embodiments are provided so that this disclosure will be more fully described and the scope of the invention will be fully disclosed.

Fig. 3 is a schematic plan view showing the structure of an FFS-LCD electrode according to the first embodiment of the present invention. As shown in FIG. 3, the gate line 31 is disposed on the first substrate 30 in the horizontal direction, and the data line 32 and the gate line 31 are vertically disposed to form the pixel area P. A common electrode 33 is disposed in the pixel area P in an approximately square or approximately rectangular shape. The thin film transistor 34 is disposed at the intersection of the gate line 31 and the data line 32 and is connected to the gate line 31 and the data line 32. The pixel electrode 35 is disposed on the common electrode 33 in a circular ring structure and partially overlaps the common electrode 33. The pixel electrode 35 includes a plurality of electrode patterns 351, 352 and 353, and in this embodiment, the electrode patterns 351, 352 and 353 are concentric rings having different sizes, wherein the concentric annular electrode pattern 351 The diameter is larger than the diameter of the electrode pattern 352. The diameter of the electrode pattern 352 of the concentric ring is larger than the diameter of the electrode pattern 353, and the plurality of electrode patterns 351, 352 and 353 are not in contact with each other and the distance between them is equidistant. A plurality of electrode patterns 351, 352, and 353 are connected to each other by the pixel connection electrode 36, and the pitch may be set to be unequal or approximate. In the above, the pixel electrode 35 is connected to the thin film transistor 34 through the pixel connection electrode 36, wherein the pixel electrode 35, the pixel connection electrode 36 and the common electrode 33 are each made of a transparent conductive material. A pixel compensation structure 37 is disposed at a corner of the pixel region P, wherein the corner portion, that is, the pixel electrode 35 and the common electrode 33 do not overlap, and in this embodiment, the corner is common. The upper left, upper right, and lower right areas of the electrode 33, wherein the lower left area is the position of the thin film transistor 34, and the middle part is the pixel electrode 35. Further, the pixel electrode compensation structure 37 is disposed outside the electrode pattern 351 of the pixel electrode 35 and connected to the pixel electrode 35, where the pixel electrode compensation structure 37 overlaps with the common electrode 33. The present invention can effectively control the corners of the pixel region P by setting the pixel electrode compensation structure 37 at the corner of the pixel region P, in the case where a voltage is applied, the electric field generated between the common electrode 33 and the pixel electrode compensation structure 37. The alignment of the liquid crystal molecules overcomes the uneven display of brightness caused by the liquid crystal alignment disorder at the corners of the pixel region in the prior art, especially the low gray scale dark state display brightening defect, thereby improving the display quality of the FFS-LCD and obtaining better The screen shows the effect.

In the FFS-LCD of the first embodiment of the present invention, the pixel compensation structure 37 further includes a pixel compensation electrode 371, 372 and a connection electrode 373 through which the pixel compensation electrodes 371 and 372 are connected. The pixel electrodes 35 are connected. In this embodiment, the connection electrode 373 is connected to the outside of the electrode pattern 351 of the pixel electrode 35, and the connection electrode 373 is connected across the pixel compensation electrode 372 and finally connected to the inside of the pixel compensation electrode 371. The pixel compensation electrodes 371, 372 and the connection electrode 373 are both made of a transparent conductive material. In this embodiment, the pixel compensation electrode is a curved electrode, but the invention does not limit the pixel compensation electrode to a curved electrode. As long as the pixel compensation electrode structure capable of improving the liquid crystal alignment disorder at the corners of the pixel region is also applicable to the present invention. In the first embodiment of the present invention, there are two pixel compensation electrodes, but the present invention does not limit the number of pixel compensation electrodes, as long as the number of compensation electrodes capable of improving the liquid crystal alignment disorder at the corners of the pixel region falls into the present invention. Within the scope of the invention.

Fig. 4 is a top plan view showing the structure of the FFS-LCD electrode according to the first embodiment of the present invention. As shown in FIG. 4, the electrode structure and its connection relationship are the same as those in the first embodiment, and will not be described again here. The embodiment of the modification is different from the first embodiment in that the pixel compensation electrodes 471 and 472 are strips. Shape electrode.

The above two embodiments of the present invention only describe the two shapes of the pixel compensation electrode, and are not limited thereto, and the present invention is applicable to a pixel compensation electrode capable of improving alignment disorder of liquid crystal molecules at corners of a pixel region.

Fig. 5 is a schematic plan view showing the structure of an FFS-LCD electrode according to a second embodiment of the present invention. As shown in Fig. 5, the gate line 51 is disposed on the first substrate 50 in the horizontal direction, and the data line 52 and the gate line 51 are vertically disposed to form the pixel area P. A common electrode 53 is disposed in the pixel area P in an approximately square or approximately rectangular shape. The thin film transistor 54 is disposed at the intersection of the gate line 51 and the data line 52 and is connected to the gate line 51 and the data line 52. The pixel electrode 55 is disposed on the common electrode 53 in a diamond-shaped annular structure and partially overlaps the common electrode 53. The pixel electrode 55 includes a plurality of electrode patterns 551, 552 and 553, and in this embodiment, the electrode patterns 551, 552 and 553 are concentric diamond rings having different sizes, wherein the electrode pattern 553 of the concentric diamond ring has a diameter The diameter of the electrode pattern 552 is larger than the diameter of the electrode pattern 552, and the diameter of the electrode pattern 552 of the rhombic ring is larger than the diameter of the electrode pattern 551, and the plurality of electrode patterns 551, 552 and 553 are not in contact with each other and the distance between them is equidistant. The plurality of electrode patterns 551, 552, and 553 are connected to each other by the pixel connection electrode 56, and the pitch may be set to be unequal or approximate. In the above, the pixel electrode 55 is connected to the thin film transistor 54 through the pixel connection electrode 56, wherein the pixel electrode 55, the pixel connection electrode 56 and the common electrode 53 are each made of a transparent conductive material. A pixel compensation structure 57 is disposed at a corner of the pixel region P, wherein the corner portion, that is, the pixel electrode 55 and the common electrode 53 do not overlap, and in this embodiment, the corner is common. The upper left, upper right, and lower right areas of the electrode 53, wherein the lower left area is the position of the thin film transistor 54, the middle part is the pixel electrode 55, and further, the pixel compensation structure 57 is disposed at the electrode of the pixel electrode 55. The pattern 553 is outside and connected to the pixel electrode 55, where the pixel electrode compensation structure 57 overlaps with the common electrode 53. The invention passes The pixel electrode compensation structure 57 is disposed at a corner of the pixel region P. When a voltage is applied, an electric field generated between the common electrode 53 and the pixel electrode compensation structure 57 can effectively control liquid crystal molecules at the corners of the pixel region P. The alignment overcomes the disorder of the liquid crystal alignment at the corner of the pixel area in the prior art, resulting in uneven brightness display, especially the low gray scale dark state display, thereby improving the display quality of the FFS-LCD and obtaining a better picture display. effect.

In the FFS-LCD of the second embodiment of the present invention, the pixel compensation structure 57 further includes a pixel compensation electrode 571, 572 and a connection electrode 573 through which the pixel compensation electrodes 571 and 572 are connected. The pixel electrodes 55 are connected. In this embodiment, the connection electrode 573 is connected to the outside of the electrode pattern 553 of the pixel electrode 55, and the connection electrode 573 is connected across the pixel compensation electrode 572 and finally connected to the inside of the pixel compensation electrode 571. Wherein the pixel compensation electrodes 571, 572 and the connection electrode 573 are each made of a transparent conductive material. In this embodiment, the pixel compensation electrode is a strip electrode, but is not limited thereto, and the present invention is applicable to a pixel compensation electrode capable of improving alignment disorder of liquid crystal molecules at corners of a pixel region. In the embodiment of the present invention, there are two pixel compensation electrodes, but the present invention does not limit the number of pixel compensation electrodes, as long as the number of compensation electrodes capable of improving the liquid crystal alignment disorder at the corners of the pixel region falls within the present invention. Within the scope of rights.

Fig. 6 is a top plan view showing the structure of an FFS-LCD electrode according to a third embodiment of the present invention. As shown in Fig. 6, the gate line 61 is disposed on the first substrate 60 in the horizontal direction, and the data line 62 and the gate line 61 are vertically disposed to form the pixel area P. A common electrode 63 is disposed in the pixel area P in an approximately square or approximately rectangular shape. The thin film transistor 64 is disposed at the intersection of the gate line 61 and the data line 62 and is connected to the gate line 61 and the data line 62. The pixel electrode 65 is disposed on the common electrode 63 in a spiral structure and is common to The through electrodes 63 partially overlap. The pixel electrode 65 and the common electrode 63 are both made of a transparent conductive material. A pixel compensation structure 67 is disposed at a corner of the pixel region P, wherein the corner portion, that is, the pixel electrode 65 and the common electrode 63 do not overlap, and in this embodiment, the corner is common. The upper left, upper right, and lower right areas of the electrode 63, wherein the lower left area is the position of the thin film transistor 64, and the middle part is the pixel electrode 65. Further, the pixel electrode compensation structure 67 is disposed on the spiral structure pixel. The outside of the electrode 65 is connected to the pixel electrode 65, where the pixel electrode compensation structure 67 overlaps with the common electrode 63. The present invention can effectively control the corners of the pixel region P by setting the pixel electrode compensation structure 67 at the corner of the pixel region P, in the case where a voltage is applied, the electric field generated between the common electrode 63 and the pixel electrode compensation structure 67. The alignment of the liquid crystal molecules overcomes the disorder of the liquid crystal alignment at the corners of the pixel region in the prior art, resulting in uneven brightness display, especially the low gray scale dark state display, thereby improving the display quality of the FFS-LCD and obtaining better The screen shows the effect.

In the FFS-LCD of the third embodiment of the present invention, the pixel compensation structure 67 further includes a pixel compensation electrode 671, 672 and a connection electrode 673 through which the pixel compensation electrodes 671 and 672 are connected. The pixel electrodes 65 are connected. In this embodiment, the connection electrode 673 is connected to the pixel electrode 65, and the connection electrode 673 is connected across the pixel compensation electrode 672 and finally connected to the inside of the pixel compensation electrode 671, wherein the pixel compensation The electrodes 671, 672 and the connection electrode 673 are each made of a transparent conductive material. In this embodiment, the pixel compensation electrode is a curved electrode, but is not limited thereto, and the present invention is applicable to a pixel compensation electrode capable of improving alignment disorder of liquid crystal molecules at corners of a pixel region. In the embodiment of the present invention, there are two pixel compensation electrodes, but the present invention does not limit the number of pixel compensation electrodes, as long as the number of compensation electrodes capable of improving the liquid crystal alignment disorder at the corners of the pixel region falls within the present invention. Within the scope of rights.

Fig. 7 is a top plan view showing the structure of an FFS-LCD electrode according to a fourth embodiment of the present invention. As shown in Fig. 7, the gate line 71 is disposed on the first substrate 70 in the horizontal direction, and the data line 72 and the gate line 71 are vertically disposed to form the pixel region P. The one-pixel electrode 73 is disposed in the pixel area P in an approximately square or approximately rectangular shape. The thin film transistor 74 is disposed at the intersection of the gate line 71 and the data line 72 and is connected to the gate line 71 and the data line 72. In the pixel region P, the common electrode 75 is provided on the pixel electrode 73 in an annular opening structure and partially overlaps the pixel electrode 73. The common electrode 75 includes a plurality of annular openings 751 and 752, and the annular opening 751 is disposed outside the annular opening 752, wherein the common electrode 75 and the pixel electrode 73 are both made of a transparent conductive material. At the corner of the pixel region P, the common electrode compensation structure 77 is disposed outside the annular opening of the common electrode 75. In this embodiment, the corner is shown as the upper left, upper right, and lower right areas of the common electrode 75, wherein the lower left area is the position of the thin film transistor 74, and the middle part is the pixel electrode 73. Further, the drawing The element electrode compensation structure 77 is disposed outside the annular opening 751 of the common electrode 75.

In the FFS-LCD of the fourth embodiment of the present invention, the common electrode compensation structure 77 further includes an arcuate opening, and the arcuate opening is disposed outside the annular opening 751 of the common electrode 75. Due to the presence of the common electrode compensation structure 77, the liquid crystal molecules located at the corners of the pixel region P can be effectively controlled by the electric field in the case where a voltage is applied. In the present invention, the number and shape of the openings included in the common electrode compensation structure are not limited by the embodiment, as long as the purpose of improving the pixel alignment disorder of the pixel corners can be achieved.

The present invention provides a common electrode compensation structure 77 at a corner of the pixel region P. In the case where a voltage is applied, an electric field generated between the pixel electrode 73 and the common electrode compensation structure 77 can effectively control the corner of the pixel region P. Overlapping existing liquid crystal molecules In the technology, the liquid crystal alignment disorder at the corner of the pixel area leads to uneven brightness display, especially the low gray scale dark state display bright defect, thereby improving the display quality of the FFS-LCD and obtaining a better picture display effect.

Fig. 8 is a schematic plan view showing the structure of an FFS-LCD electrode according to a fifth embodiment of the present invention. As shown in Fig. 8, the gate line 81 is disposed on the first substrate 80 in the horizontal direction, and the data line 82 and the gate line 81 are vertically disposed to form the pixel region P. The one-pixel electrode 83 has an approximately square or approximately rectangular shape disposed in the pixel area P. The thin film transistor 84 is disposed at the intersection of the gate line 81 and the data line 82 and is connected to the gate line 81 and the data line 82. In the pixel region P, the common electrode 85 is provided on the pixel electrode 83 in a spiral opening structure and partially overlaps the pixel electrode 83. The common electrode 85 includes a spiral opening 851, and the common electrode 85 and the pixel electrode 83 are both made of a transparent conductive material. At the corner of the pixel region P, the common electrode compensation structure 87 is disposed outside the spiral opening of the common electrode 85.

In the FFS-LCD of the fifth embodiment of the present invention, the common electrode compensation structure 87 further includes a plurality of arcuate openings 871 and 872 disposed outside the arcuate opening 851 of the common electrode 85, and The curved opening 871 is located outside of the curved opening 872. Due to the presence of the common electrode compensation structure 87, the liquid crystal molecules located at the corners of the pixel region P can be effectively controlled by the electric field in the case where a voltage is applied. In the present invention, the number and shape of the openings included in the common electrode compensation structure are not limited by the embodiment, as long as the purpose of improving the pixel alignment disorder of the pixel corners can be achieved.

The present invention can effectively control the corners of the pixel region P by providing the common electrode compensation structure 87 at the corners of the pixel region P, in the case where a voltage is applied, the electric field generated between the pixel electrode 83 and the common electrode compensation structure 87. Overlapping existing liquid crystal molecules In the technology, the liquid crystal alignment disorder at the corner of the pixel area leads to uneven brightness display, especially the low gray scale dark state display bright defect, thereby improving the display quality of the FFS-LCD and obtaining a better picture display effect.

In the above-described embodiments, the present invention has been exemplarily described, and various modifications of the present invention may be made without departing from the spirit and scope of the invention.

31‧‧‧ gate line

32‧‧‧Data line

33‧‧‧Common electrode

34‧‧‧film transistor

35‧‧‧pixel electrodes

351, 352, 353‧‧‧ electrode pattern

36‧‧‧ pixel connection electrode

37‧‧‧pixel element compensation structure

371, 372‧‧‧ pixel compensation electrode

373‧‧‧Connecting electrode

Claims (17)

a fringe field switching type liquid crystal display device comprising: a first substrate; a gate line disposed on the first substrate; a data line disposed on the first substrate, and The gate lines intersect each other to form a pixel region; a thin film transistor is disposed on the first substrate and connected to the gate line and the data line; a common electrode is disposed on a pixel on the first substrate and in the pixel region; a pixel electrode disposed on the common electrode and partially overlapping the common electrode, and the pixel electrode Connected to the thin film transistor; a pixel compensation structure disposed at four upper left, lower left, upper right, and lower right corners of the common electrode of the pixel electrode and the common electrode non-overlapping region Third, and the pixel electrode compensation structure is connected to the pixel electrode; a second substrate corresponding to the first substrate; a liquid crystal layer disposed on the first Between the substrate and the second substrate. The edge electric field switching type liquid crystal display device of claim 1, wherein the pixel electrode compensation structure comprises a pixel compensation electrode and a connection electrode. The edge electric field switch type liquid crystal display device of claim 2, wherein the pixel compensation electrode is a curved electrode. The edge electric field switching type liquid crystal display device of claim 2, wherein the pixel compensation electrode is a strip electrode. The edge electric field switch type liquid crystal display device of claim 2, wherein the pixel compensation electrode is connected to the pixel electrode by the connection electrode. The edge electric field switching type liquid crystal display device of claim 1, wherein the pixel electrode comprises a plurality of electrode patterns, and the electrode patterns are concentric rings having different sizes. The edge electric field switching type liquid crystal display device of claim 6, wherein the electrode pattern is circular. The edge electric field switching type liquid crystal display device according to claim 6, wherein the electrode pattern is a diamond shape. a fringe field switching type liquid crystal display device comprising: a first substrate; a gate line disposed on the first substrate; a data line disposed on the first substrate, and The gate lines intersect each other to form a pixel region; a thin film transistor disposed on the first substrate and connected to the gate line and the data line; a pixel electrode, the setting In the pixel region and connected to the thin film transistor; a pixel compensation structure disposed on the upper left and lower left of the common electrode of the pixel electrode and the common electrode non-overlapping region Three of the upper right and lower right corner regions; a common electrode disposed on the pixel electrode and partially overlapping the pixel electrode; and a common electrode compensation structure, And disposed in the pixel region and located outside the annular opening of the common electrode; a second substrate disposed corresponding to the first substrate; a liquid crystal layer disposed on the first Between the substrate and the second substrate. The edge electric field switching type liquid crystal display device of claim 9, wherein the common electrode compensation structure comprises a plurality of openings. a fringe field switching type liquid crystal display device comprising: a first substrate; a gate line disposed on the first substrate; a data line disposed on the first substrate, and The gate lines intersect each other to form a pixel region; a thin film transistor is disposed on the first substrate and connected to the gate line and the data line; a common electrode is disposed on The first substrate is located in the pixel region; a pixel electrode is disposed on the common electrode and partially overlaps the common electrode, and the The pixel electrode is connected to the thin film transistor; a pixel compensation structure is disposed on the upper left and lower left of the common electrode of the non-overlapping region of the pixel electrode and the common electrode Three of the upper right and lower right corner regions, and the pixel electrode compensation structure is connected to the pixel electrode; a second substrate corresponding to the first substrate; a liquid crystal layer It is disposed between the first substrate and the second substrate. The edge electric field switching type liquid crystal display device of claim 11, wherein the pixel electrode compensation structure comprises a pixel compensation electrode and a connection electrode. The edge electric field switch type liquid crystal display device of claim 12, wherein the pixel compensation electrode is a curved electrode. The edge electric field switch type liquid crystal display device of claim 12, wherein the pixel compensation electrode is a strip electrode. The edge electric field switch type liquid crystal display device of claim 12, wherein the pixel compensation electrode is connected to the pixel electrode by the connection electrode. a fringe field switching type liquid crystal display device comprising: a first substrate; a gate line disposed on the first substrate; a data line disposed on the first substrate, and The gate lines intersect each other to form a pixel region; a thin film transistor disposed on the first substrate and connected to the gate line and the data line; a pixel electrode, the setting In the pixel region and connected to the thin film transistor; a pixel compensation structure disposed on the upper left and lower left of the common electrode of the pixel electrode and the common electrode non-overlapping region And three of the upper right and lower right corner regions; a common electrode, wherein a spiral opening structure is disposed in the pixel region and partially overlaps the pixel electrode; a common electrode compensation structure, Provided in the pixel region and located outside the spiral opening of the common electrode; a second substrate corresponding to the first substrate; a liquid crystal layer disposed on the first Between the substrate and the second substrate. The edge electric field switching type liquid crystal display device of claim 16, wherein the common electrode compensation structure comprises a plurality of openings.