CN105785671B - Display device - Google Patents

Abstract

The present invention relates to a display device, comprising: a first and a second scanning line, which are adjacently arranged on a first substrate; a first and a second data line, which are arranged on the first substrate and intersect with the first and second scanning lines to define a closed area; a first pixel electrode, which is arranged in the closed area and electrically connected to the first data line; a second pixel electrode, wherein the first or second data line is arranged between the first and second pixel electrodes; and a patterned common electrode, which comprises a first area and a second area, wherein the first area and the second area are respectively arranged corresponding to the top of the first and second pixel electrodes and are respectively electrically insulated from the first and second pixel electrodes, and the first area and the second area are connected and symmetrical to each other with a direction perpendicular to the first scanning line as a reference.

Description

display screen

technical field

The present invention relates to a display device, in particular to a display device capable of improving transmittance, aperture ratio, and liquid crystal efficiency.

Background technique

With the continuous advancement of display technology, all devices are developing toward small size, thin thickness, and light weight. Therefore, the current mainstream display devices on the market have developed from the previous cathode ray tubes to liquid crystal display devices. In particular, liquid crystal display devices can be applied in quite a lot of fields. For display devices such as mobile phones, notebook computers, video cameras, cameras, music players, mobile navigation devices, and televisions used in daily life, liquid crystal display panels are mostly used for their display panels. In recent years, with the development trend of humanized and simplified operation, display devices with touch panels are more and more widely used in daily life.

Nowadays, the development technology of liquid crystal display equipment has gradually matured, and various manufacturers are still committed to developing display equipment with higher optical performance to meet consumers' requirements for display quality, among which transmittance is the most important parameter in display equipment One, for example, in automotive applications, there is also a requirement for high panel characteristics. While meeting the restrictions on the viewing angle of the vehicle panel, it is also necessary to increase the penetration rate and improve the contrast of the left and right viewing angles.

Therefore, in order to improve the viewing angle characteristics and meet the contrast requirements, and increase the aperture ratio and liquid crystal efficiency, it is still necessary to develop a display device with improved optical performance, hoping to bring better display quality to consumers.

Contents of the invention

The main purpose of the present invention is to provide a display device to improve the optical performance such as transmittance, aperture ratio, and liquid crystal efficiency.

In order to achieve the above object, the present invention provides a display device, comprising: a first scanning line and a second scanning line arranged adjacently on a first substrate; a first data line and a second data line arranged A closed area is defined on the first substrate and intersects with the first scan line and the second scan line; a first pixel electrode is arranged in the closed area and electrically connected to the first data line; A second pixel electrode, the first data line or the second data line is arranged between the first pixel electrode and the second pixel electrode; and a patterned common electrode, including a first area and a second area The first region is disposed corresponding to above the first pixel electrode and electrically insulated from the first pixel electrode, the second region is disposed corresponding to above the second pixel electrode and electrically insulated from the second pixel electrode, and The first area and the second area are connected and symmetrical to each other based on the direction perpendicular to the first scanning line.

In the present invention, the first region and the second region may respectively include a plurality of elongated portions. Wherein, there may be an included angle between each elongated portion and the longitudinal direction of the scanning line, and the included angle is between 5 degrees and 20 degrees, preferably between 5 degrees and 10 degrees. One end of each elongated portion may have an extension portion, and there may be an included angle between the extension portion and the elongated portion, and the included angle is between 100° and 170°, preferably between 120° degrees to 160 degrees. There may be an included angle between the extending portion and a lengthwise direction parallel to the first scanning line, and the included angle is between 20 degrees and 70 degrees, preferably between 30 degrees and 60 degrees. The extension in the first zone may be connected to the extension in the second zone. The extension part can partially cover the first data line or the second data line.

In the present invention, the first area can be divided into a first unit and a second unit, the first unit and the second unit respectively include a plurality of elongated parts, the first unit and the second unit are parallel The length direction of the first scanning line is partially symmetrical with respect to the reference.

In the present invention, the axis of symmetry of the first unit and the second unit is equidistant from the first scan line and the second scan line.

In the present invention, the elongated parts of the first unit can be arranged in a first direction, the elongated parts of the second unit can be arranged in a second direction, and the distance between the first direction and the second direction There is an included angle, and the included angle is between 10 degrees and 30 degrees, preferably between 10 degrees and 20 degrees.

In the present invention, the first area includes a first unit and a second unit, the first unit and the second unit respectively include a plurality of elongated parts, and the elongated parts of the first unit are formed by a first unit Arranged in one direction, the elongated parts of the second unit are arranged in a second direction, and a first included angle between the first direction and the longitudinal direction perpendicular to the first scanning line is equal to the second direction and the vertical direction of the first scanning line. A second included angle in the longitudinal direction of a scan line.

In the present invention, it also includes a second substrate located on the first substrate, and a display medium layer located between the second substrate and the patterned common electrode, wherein the display device is a fringe electric field switching type ( FFS) display device or an in-plane switching (IPS) display device.

Accordingly, in the display device of the present invention, the patterned common electrode is disposed above the pixel electrode and has a specific pattern. Therefore, the dark stripe phenomenon occurring on the edge of the pixel electrode and the common electrode (that is, between adjacent pixels) is significantly reduced, so the installation area of the black matrix (BM) can be reduced, and the transmittance, aperture ratio and liquid crystal efficiency can be improved. .

Description of drawings

In order to further illustrate the technical content of the present invention, the following detailed description is as follows in conjunction with the embodiments and accompanying drawings, wherein:

FIG. 1A is a partial schematic diagram of a display device according to a preferred embodiment of the present invention.

FIG. 1B is a schematic diagram of a display device according to a preferred embodiment of the present invention.

FIG. 2 is a schematic top view of the patterned common electrode in FIG. 1A .

FIG. 3 is a partially enlarged view of FIG. 2 .

FIG. 4 is a schematic top view of the patterned common electrode in FIG. 1A according to another preferred embodiment of the present invention.

FIG. 5 is a partially enlarged view of FIG. 4 .

Detailed ways

The implementation of the present invention is illustrated through specific specific examples below, and those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and various modifications and changes can be made to the details in this specification for different viewpoints and applications without departing from the spirit of this creation.

Example 1

FIG. 1A is a partial schematic diagram of a display device of the present invention. The display device includes: a substrate 1; a first metal layer 2 disposed on the substrate 1 and including a scanning line; a first insulating layer 31 disposed on the first metal layer 2; a semiconductor layer 4, It is arranged on the first insulating layer 31; a second metal layer 5 is arranged on the semiconductor layer 4 and includes a data line, and is electrically insulated from the first metal layer 2; a second insulating layer 32 and a The third insulating layer 33 is arranged on the second metal layer 5 in sequence, and the opening 321 passes through the second insulating layer 32 and the third insulating layer 33 and exposes part of the semiconductor layer 4; a pixel electrode 6 is It is arranged on the third insulating layer 33 and in the area surrounded by two adjacent scanning lines and two adjacent data lines, and is located in the opening 321 of the second insulating layer 32 and the third insulating layer 33 And electrically connected to the data line of the second metal layer 5 ; and a patterned common electrode 7 disposed on the pixel electrode 6 and electrically insulated from the pixel electrode 6 by a fourth insulating layer 34 . Wherein, the substrate 1 , the first metal layer 2 , the first insulating layer 31 , the semiconductor layer 4 , and the second metal layer 5 form a thin film transistor 10 .

The display device mentioned in the present invention may be a fringe field switching (FFS) display device or an in-plane switching (IPS) display device, but the present invention is not limited thereto. The thin film transistor 10 can be manufactured by using known thin film transistor technology, so details will not be repeated here. The substrate 1 can be a substrate commonly used in this technical field, such as a glass substrate, a plastic substrate, a silicon substrate, and a ceramic substrate. Furthermore, the materials of the first metal layer 2 and the second metal layer 5 can respectively use conductive materials commonly used in this technical field, such as metals, alloys, metal oxides, or other commonly used electrode materials in this technical field; and preferably Metal material, but the present invention is not limited thereto. If necessary, a composite electrode of a transparent electrode and a translucent electrode can be used, such as a composite electrode of a TCO electrode and a platinum thin film electrode. The pixel electrode 6 can be a flat electrode layer or a patterned electrode layer commonly used in this technical field, and the material of the pixel electrode 6 and the patterned common electrode 7 can be a transparent conductive material commonly used in this technical field, such as metal oxides such as ITO and IZO. transparent electrode material. As for the semiconductor layer 4, semiconductor oxide materials commonly used in this technical field can also be used, such as indium gallium zinc oxide (IGZO), indium tin zinc oxide (ITZO), other metal oxide semiconductors, etc.; in addition, the first insulating layer 31, The material of the second insulating layer 32, the third insulating layer 33 and the fourth insulating layer 34 can be the passivation layer material commonly used in this technical field such as silicon nitride (SiNx), silicon oxide (SiOx) or its combination, can consider Leveling, capacitance matching and other conditions to be selected. However, the present invention is not limited thereto.

In order to highlight the features of the present invention, common elements in general display devices are omitted in FIG. 1A . Please refer to FIG. 1B . For example, when the display device of the present invention is a liquid crystal display (LCD), the display device includes the structure of FIG. 1A The unit 100, the display medium layer 200, the second substrate 300 (including black matrix, color filter), and the upper and lower polarizers 401, 402, etc. In addition, the display device can be applied to any electronic device known in the art, such as monitors, mobile phones, notebook computers, video cameras, cameras, music players, mobile navigation devices, televisions, and so on.

FIG. 2 is a schematic top view of the patterned common electrode 7 in FIG. 1A . Fig. 1A is a sectional view at the section line A-A' in Fig. 2 . In FIG. 2 , in order to clearly express the relative positions of the patterns of the patterned common electrodes 7 , the pixel electrodes 6 below the patterned common electrodes 7 are omitted. Please refer to FIG. 1A and FIG. 2 together, the first metal layer 2 includes a first scan line 21 and a second scan line 22, the second metal layer 5 includes a first data line 51 and a second data line 52, It intersects with the first scanning line 51 and the second scanning line 52 to define a closed area 9, the longitudinal direction of the first scanning line 21 is represented by B, and the longitudinal direction of the first data line 51 is represented by C, The pixel electrode 6 below the patterned common electrode 7 may include a first pixel electrode and a second pixel electrode, the first pixel electrode is disposed in the closed area 9 and electrically connected to the first data line 51, the first pixel electrode A data line 51 or the second data line 52 is disposed between the first pixel electrode and the second pixel electrode, so the second pixel electrode can be electrically connected to the second data line 52, and the patterned common electrode 7 includes a first area 71 and a second area 72, the first area 71 is set corresponding to the top of the first pixel electrode and electrically insulated from the first pixel electrode, the second area 72 is set corresponding to the second Above the pixel electrode and electrically insulated from the second pixel electrode, the first region 71 and the second region 72 are connected with respect to the length direction C perpendicular to the first scan line 21 and are symmetrical to each other. It is worth mentioning that, in another embodiment, the first scan line 21 or the second scan line 22 can be a folded line, at this time the first region 71 and the second region 72 are perpendicular to the first scan line 21 or the substantial extension direction B of the second scanning line 22 are connected and symmetrical to each other. In another embodiment, the first region 71 and the second region 72 are connected with respect to the length direction C parallel to the first data line 51 or the second data line 52 and are symmetrical to each other. Similarly, in another embodiment, the first data line 51 or the second data line 52 can be a folded line, so the first area 71 and the second area 72 are parallel to the first data line 51 or The substantial extension direction C of the second data line 52 is connected and symmetrical to each other based on the reference.

Please refer to FIG. 3 , which is a partially enlarged view of FIG. 2 . Wherein, the first area 71 and the second area 72 may respectively include a plurality of elongated portions 711, 721, and each elongated portion 711, 721 may have an included angle θ1 with the longitudinal direction B of the scanning line 21. , the angle θ1 is between 5 degrees and 20 degrees, preferably between 5 degrees and 10 degrees. When the angle is too large, the dark lines will expand outward, that is, the dark lines will move away from the The direction of the first data line 51 or the second data line 52 is extended, which reduces the transmittance of the display panel.

Moreover, one end of each elongated portion 711, 721 may have an extension portion 712, 713, 722, 723, and there may be a clip between the extension portion 712, 713, 722, 723 and the elongated portion 711, 721. Angle θ2, the angle θ2 is between 100 degrees and 170 degrees, preferably between 120 degrees and 160 degrees, when the angle is greater than 170 degrees, the extensions 712, 713, 722, 723 suppress dark lines The effect is not good, when the included angle is less than 100 degrees, the dark lines will expand towards the direction of the long strip, thus causing the decrease of the penetration rate; in this embodiment, the included angle θ2 is about 155 degrees, preferably , as shown in Figure 3, both ends of the elongated part 711 have extensions 712, 713, both ends of the elongated part 721 have extensions 722, 723, and the extending directions of the extensions 712, 713 are located along the length On both sides of the length direction of the strip portion 711, the extending directions of the extension portions 722 and 723 are respectively located on both sides along the length direction of the strip portion 721, and the extension portions 713 and 723 are connected, so that the generation of dark lines can be effectively suppressed and Improve the balance of left and right viewing angles.

Moreover, there may be an included angle θ3 between the extensions 712, 713, 722, 723 and the longitudinal direction B parallel to the first scanning line 21, and the included angle θ3 is between 20 degrees and 70 degrees, preferably It is between 30 degrees and 60 degrees.

In addition, the extension 713 in the first region 71 can be connected with the extension 723 in the second region 72, and the extensions 712, 713, 722, 723 can partially cover the first data line 51 or the above the second data line 52 . The size of the extensions 712, 713, 722, 723 is not limited. In this embodiment, the length D1 of the extensions 712, 713, 722, 723 in the longitudinal direction B of the first scanning line 21 is preferably 3-5μm, which can reduce the occurrence of dark lines. Moreover, the width T1 of the elongated portion 711, 721 and the extension portion 712, 713, 722, 723 is preferably 2-5 μm, but the present invention is not limited thereto; “width” means the elongated portion or the The linear distance (ie the shortest distance) between the two sides of the extension.

In addition, the first area 71 can be divided into a first unit 73 and a second unit 74, and the first unit 73 and the second unit 74 are at least partly divided with respect to the longitudinal direction B of the parallel first scanning line 21. symmetry.

In addition, the first unit 73 and the second unit 74 can be separated by a symmetry axis 8, the symmetry axis 8 is parallel to the length direction B of the first scanning line 21, and the symmetry axis 8 is connected to two adjacent first scanning lines. The scanning line 21 and the second scanning line 22 can be equidistant, so that not only can the left and right viewing angles be balanced, but also the up and down viewing angles can be more balanced, so the user can have a good viewing angle at any position.

In addition, the elongated portions 711 of the first unit 73 can be arranged in a first direction D, and the elongated portions 711 of the second unit 74 can be arranged in a second direction E, and the first direction D and the second direction There is an included angle θ4 between the two directions E, and the included angle θ4 is between 10° and 30°, preferably between 10° and 20°.

Accordingly, in the display device of the present invention, since the patterned common electrode is arranged above the pixel electrode and has a specific pattern, it occurs at the edge of the pixel electrode and the common electrode (especially between the first region 71 and the The dark fringes between the second regions 72 are significantly reduced, so the area of the black matrix (BM) can be reduced, and the transmittance, aperture ratio and liquid crystal efficiency of the display device can be improved.

Example 2

Except that the pattern of the patterned common electrode 7 is different from that of Embodiment 1, the display device of Embodiment 2 is substantially the same as that of Embodiment 1; for the purpose of brief description, some descriptions will not be repeated, and those skilled in the art can It is clear that the same applied parts in Example 1 can be incorporated into Example 2.

In FIG. 4 , in order to clearly express the relative positions of the patterns of the patterned common electrodes 7 , the pixel electrodes below the patterned common electrodes 7 are omitted. Please refer to FIG. 1A and FIG. 4 together, the first metal layer 2 includes a first scan line 21 and a second scan line 22, and the second metal layer 5 includes a first data line 51 and a second data line 52, which intersects the first scanning line 51 and the second scanning line 52 to define a closed area 9, the length direction of the first scanning line 21 is denoted by B, and the length direction of the first data line 51 is denoted by C , and the patterned common electrode 7 includes a first region 71 and a second region 72, the first region 71 and the second region 72 are connected on the basis of the length direction B perpendicular to the first scanning line 21 and symmetrical to each other.

Please refer to FIG. 5 , which is a partially enlarged view of FIG. 4 . Wherein, the first area 71 may include a first unit 73 and a second unit 74 . The first unit 73 and the second unit 74 respectively include a plurality of elongated portions 711, 714, and each elongated portion 711, 714 may have an included angle θ1 with the longitudinal direction B parallel to the first scanning line 21. , the included angle θ1 is between 5 degrees and 20 degrees, preferably between 5 degrees and 10 degrees. When the included angle is too large, the dark lines will protrude outwards, which will cause the display panel’s transmittance reduce. The elongated portions 711 of the first unit 73 can be arranged in a first direction D, and there is an angle θ5 between the elongated portions 711 and the longitudinal direction B perpendicular to the first scanning line 21 , the second unit The elongated portion 711 of 74 can be arranged in a second direction E, and there is an included angle θ6 between the elongated portion 711 and the longitudinal direction B perpendicular to the first scanning line 21, and the included angle θ5 is equal to the included angle θ6, That is, the first unit 73 and the second unit 74 are symmetrical with respect to the length direction B perpendicular to the first scan line 21 .

And, one end of each elongated part 711, 714 can have an extension part 712, 713, 715, 716, the extension part 713 is connected with 716, and the extension part 712, 713, 715, 716 is connected with the elongated part There may be an included angle θ2 between the parts 711 and 714, and the included angle θ2 is between 100 degrees and 170 degrees, preferably between 120 degrees and 160 degrees. When the included angle is greater than 170 degrees, the extension part 712, 713, 722, 723 are not effective in suppressing dark lines. When the included angle is less than 100 degrees, the dark lines will expand close to the elongated part, thus causing a decrease in the penetration rate; in this embodiment, the included angle θ2 is about is 155 degrees.

Moreover, there may be an included angle θ3 between the extensions 712, 713, 715, 716 and the longitudinal direction B parallel to the first scanning line 21, and the included angle θ3 is between 20 degrees and 70 degrees, preferably It is between 30 degrees and 60 degrees. In addition, the extensions 712, 715 in the first region 71 can be connected with the extensions in the adjacent region, and the extensions 712, 715 can partially cover the first data line 51 or the second data line 52. above.

In addition, the first unit 73 and the second unit 74 can be symmetrical with a third unit 75 and a fourth unit 76 located on the other side of the first axis of symmetry 81 on the basis of a first axis of symmetry 81, and the first unit of symmetry The axis 81 is parallel to the length direction B of the first scan line 21 , and the first axis of symmetry 81 may correspond to the first scan line 21 (ie, it is located above the first scan line 21 in the top view direction).

The above-mentioned embodiments are only examples for convenience of description, and the scope of rights claimed by the present invention should be based on the scope of the patent application, rather than limited to the above-mentioned embodiments.

Claims (9)

1. A display device, comprising: A first scanning line and a second scanning line are adjacently arranged on a first substrate; A first data line and a second data line are arranged on the first substrate and intersect with the first scanning line and the second scanning line to define a closed area; a first pixel electrode, disposed in the enclosed area and electrically connected to the first data line; A second pixel electrode, the first data line or the second data line is arranged between the first pixel electrode and the second pixel electrode; and A patterned common electrode includes a first region and a second region, the first region is disposed corresponding to the top of the first pixel electrode and is electrically insulated from the first pixel electrode, the second region is disposed corresponding to the first pixel electrode Above the second pixel electrode and electrically insulated from the second pixel electrode, and the first region and the second region are connected and symmetrical to each other with respect to the length direction perpendicular to the first scanning line, and the first region includes a A first unit and a second unit, wherein the first unit and the second unit are symmetrical to each other on the basis of the length direction perpendicular to the first scanning line. 2. The display device according to claim 1, wherein the first area and the second area respectively comprise a plurality of elongated parts, one end of each elongated part has an extension part, and the extension part and the elongated part There is an included angle between the bar parts, and the included angle is between 100 degrees and 170 degrees. 3. The display device according to claim 1, wherein the first area and the second area respectively comprise a plurality of elongated parts, one end of each elongated part has an extension part, and the extension part is parallel to the There is an included angle between the length directions of the first scanning lines, and the included angle is between 20 degrees and 70 degrees. 4. The display device as claimed in claim 1, wherein the first area and the second area respectively comprise a plurality of elongated parts, one end of each elongated part has an extension, and the The extension is connected to the extension in the second zone. 5. The display device as claimed in claim 1, wherein the first area and the second area respectively comprise a plurality of elongated parts, one end of each elongated part has an extension part, and the extension part partially covers the The first data line or the second data line. 6. The display device according to claim 1 , the patterned common electrode further comprises a third unit and a fourth unit, wherein the first unit, the second unit, the third unit and the fourth unit Respectively comprising a plurality of elongated parts, the third unit and the fourth unit have a first axis of symmetry between the first unit and the second unit, the first axis of symmetry is parallel to the length direction of the first scanning line, The first unit and the second unit are partially symmetrical to the third unit and the fourth unit located on the other side of the first axis of symmetry with the first axis of symmetry as a reference. 7. The display device according to claim 6, wherein the elongated parts of the first unit are arranged in a first direction, the elongated parts of the second unit are arranged in a second direction, and the first There is an included angle between the first direction and the second direction, and the included angle is between 10 degrees and 30 degrees. 8. The display device as claimed in claim 1, wherein the first unit and the second unit respectively comprise a plurality of elongated parts, the elongated parts of the first unit are arranged in a first direction, the second The elongated parts of the two units are arranged in a second direction, and a first included angle between the first direction and the longitudinal direction perpendicular to the first scanning line is equal to the second direction and the longitudinal direction perpendicular to the first scanning line A second included angle of . 9. The display device according to claim 1, further comprising: a second substrate located on the first substrate; a display medium layer located between the second substrate and the patterned common electrode, wherein the display The device is a fringe field switching display device or an in-plane switching display device.