Display panel and display device

Abstract

Embodiments of the present application relate to the technical field of display, and provide a display panel and a display device. The display panel comprises a first substrate having a plurality of pixel electrodes, a second substrate arranged opposite to the first substrate and having a common electrode, a liquid crystal layer located between the first substrate and the second substrate and containing liquid crystal molecules, a first vertical light alignment layer located between the first substrate and the liquid crystal layer, and a second vertical light alignment layer located between the second substrate and the liquid crystal layer. Each pixel of the display panel has a plurality of domain regions with different tilt orientations of the liquid crystal molecules. The plurality of domain regions are arranged in multiple rows along a first direction and multiple columns along a second direction perpendicular to the first direction. Each pixel electrode is arranged corresponding to one pixel and has a plurality of first slits arranged along the second direction and located at the boundaries of two adjacent columns of domain regions. The common electrode has a plurality of second slits arranged along the first direction and located at the boundaries of two adjacent rows of domain regions.

Description

Technical Field

[0001] This application relates to the field of display technology, and more specifically, to a display panel and a display device. Background Technology

[0002] Current ultraviolet vertical alignment (UV) 2 UV-VA technology uses ultraviolet light to perform photo-alignment on the alignment film on the thin film transistor (TFT) array substrate side and the alignment film on the color filter (CF) substrate side, respectively, to achieve multi-domain vertical alignment and achieve a wide viewing angle.

[0003] However, in the bright state of the pixel, a swastika-shaped dark pattern appears at the junction of the domain regions aligned with ultraviolet light and at the edge of the pixel. Existing TFT array substrates and CF substrates have limitations in assembly precision when assembling. If there is a vertical misalignment between the CF substrate and the TFT array substrate, the lateral exposure boundary of the ultraviolet domain region on the CF substrate side will deviate from the lateral boundary of the slit of the pixel electrode on the TFT array substrate side. This results in more pronounced dark patterns at the junction of adjacent domain regions, causing a decrease in the transmittance of the display panel. Utility Model Content

[0004] Therefore, it is necessary to provide a display panel and display device to solve the technical problem of transmittance loss caused by misalignment of the TFT array substrate and CF substrate in existing display panels.

[0005] This application provides a display panel in a first aspect. The display panel includes a first substrate, a second substrate, a liquid crystal layer, a first vertical light alignment layer, and a second vertical light alignment layer. The first substrate has a plurality of pixel electrodes. The second substrate is disposed opposite to the first substrate and has a common electrode. The liquid crystal layer is located between the first substrate and the second substrate and contains liquid crystal molecules. The first vertical light alignment layer is located between the first substrate and the liquid crystal layer. The second vertical light alignment layer is located between the second substrate and the liquid crystal layer. The display panel has a plurality of pixels, each pixel having a plurality of domain regions, and the tilt orientations of the liquid crystal molecules in the multiple domain regions are different. The multiple domain regions are arranged in multiple rows along a first direction and in multiple columns along a second direction, the first direction being perpendicular to the second direction. Each pixel electrode is disposed corresponding to one pixel, and each pixel electrode has a plurality of first slits arranged along the second direction and located at the boundaries of two adjacent columns of domain regions. The common electrode has a plurality of second slits arranged along the first direction and located at the boundaries of two adjacent rows of domain regions.

[0006] The display panel of the first aspect of this application, by providing a first slit arranged along a second direction on the pixel electrode of a first substrate (i.e., a TFT array substrate), and a second slit arranged along the first direction on the common electrode of a second substrate (i.e., a CF array substrate), with the first slit positioned at the boundary of two adjacent column domain regions and the second slit positioned at the boundary of two adjacent row domain regions, ensures that even if the first and second substrates are misaligned during assembly, the exposure boundary of the UV domain on the second substrate side is always aligned with the slit of the common electrode on the second substrate side, thereby avoiding a decrease in transmittance. This is beneficial for solving UV... 2 In display panels using technology A, the dark pattern problem caused by the assembly precision limitations of the TFT array substrate and CF substrate is eliminated, thereby improving the transmittance of the display panel.

[0007] In some embodiments, the plurality of domain regions includes a first domain region, a second domain region, a third domain region, and a fourth domain region. The first and second domain regions are arranged in a first row along a first direction. The third and fourth domain regions are arranged in a second row along the first direction. The first and third domain regions are arranged in a first column along a second direction. The second and fourth domain regions are arranged in a second column along the second direction. A portion of the first slit is located in the region of the second domain region adjacent to the first domain region. A portion of the first slit is located in the region of the fourth domain region adjacent to the third domain region. A portion of the second slit is located in the region of the first domain region adjacent to the fourth domain region. A portion of the second slit is located in the region of the third domain region adjacent to the second domain region.

[0008] In some embodiments, the pixel is rectangular, with a first direction being the direction of the pixel's short side and a second direction being the direction of the pixel's long side. The first slit in the second domain region and the first slit in the fourth domain region are adjacent to the centerline of the pixel's short side and are located on opposite sides of the centerline of the pixel's short side. The second slit in the first domain region and the second slit in the third domain region are adjacent to the centerline of the pixel's long side and are located on opposite sides of the centerline of the pixel's long side.

[0009] In some embodiments, a portion of the first slit is located in a region of the first domain region that is far from the second domain region, and a portion of the first slit is located in a region of the third domain region that is far from the fourth domain region; a portion of the second slit is located in a region of the second domain region that is far from the third domain region, and a portion of the second slit is located in a region of the fourth domain region that is far from the first domain region.

[0010] In some embodiments, the pixel is rectangular, with a first direction being the direction of the short side of the pixel and a second direction being the direction of the long side of the pixel; the first slit in the first domain region and the first slit in the third domain region are respectively set along the two long sides of the pixel; the second slit in the second domain region and the second slit in the fourth domain region are respectively set along the two short sides of the pixel.

[0011] In some embodiments, the extension direction of the first slit and the extension direction of the second slit are parallel to the tilt orientation of the liquid crystal molecules in their respective domain regions.

[0012] In some embodiments, when a voltage is applied to the liquid crystal layer, the tilt orientations of liquid crystal molecules in adjacent domain regions of each pixel are orthogonal.

[0013] In some embodiments, when the orientation along the first direction is defined as 0°, the first domain region, the second domain region, the third domain region, and the fourth domain region have any one of the tilt orientations of 45°, 135°, 225°, and 315°, respectively.

[0014] In some embodiments, the first slit is elliptical or rectangular, and the second slit is elliptical or rectangular.

[0015] A second aspect of this application provides a display device. The display panel includes the display panel provided in the first aspect of this application and a backlight module. The backlight module is stacked with the display panel and is used to provide backlight to the display panel.

[0016] The display device of the second aspect of this application has at least the same advantages as the display panel of the first aspect of this application, which will not be repeated here. Attached Figure Description

[0017] Figure 1 This is a schematic diagram illustrating the photo-alignment processing of a display panel in related technologies.

[0018] Figure 2 This is a schematic diagram of the alignment and vertical misalignment of the CF substrate and TFT array substrate of a display panel in related technologies.

[0019] Figure 3 This is a cross-sectional schematic diagram of a display device according to an embodiment of this application.

[0020] Figure 4 for Figure 3 A partial structural diagram of the display panel.

[0021] Figure 5 Figure (a) is a schematic diagram of the pixel electrode and common electrode corresponding to a pixel in a display panel according to an embodiment of this application; Figure 5 Figure (b) is Figure 5 (a) is a schematic diagram of the black lines generated by the pixels in the image. Figure 5 Figure (c) is Figure 5 Figure (a) shows a schematic diagram of a display panel with vertical misalignment when the first substrate and the second substrate are aligned. Figure 5 Figure (d) in the middle is Figure 5 The diagram shows the black lines generated by the pixels in image (c).

[0022] Figure 6 This is a schematic diagram of a pixel electrode and a common electrode corresponding to a pixel in a display panel according to another embodiment of this application.

[0023] Key component symbols: Display device - 100; Display panel - 10; First substrate - 11; First base - 111; Pixel electrode - 112, PE; Scan line - SL; Data line - DL; Thin film transistor - T; Second substrate - 12; Second base - 121; Common electrode - 122; Liquid crystal layer - 13; Liquid crystal molecule - LC; First vertical light alignment layer - 14; Second vertical light alignment layer - 15; First polarizer - 16; Second polarizer - 17; Sealing layer - 18; Backlight module - 20; Ultraviolet light - L; Alignment film - AL; Domain region - M; First domain region - M1; Second domain region - M2; Third domain region - M3; Fourth domain region - M4; Pixel - P; Slit - S; Exposure boundary - B; First slit - S1; Second slit - S2; Start point - E1; End point - E2; Center line - C; First direction - D1; Second direction - D2.

[0024] The following detailed description, in conjunction with the accompanying drawings, will further illustrate this application. Detailed Implementation

[0025] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the embodiments of this application, and should not be construed as limiting this application.

[0026] In the description of the embodiments of this application, the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", "clockwise", "counterclockwise", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the implementation methods of this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0027] In the description of the embodiments of this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, features defined with "first" and "second" may explicitly or implicitly include one or more of the stated features.

[0028] In the description of the embodiments of this application, unless otherwise stated, "a plurality of" means two or more. In the description of the embodiments of this application, unless otherwise stated, the term "connection" should be interpreted broadly. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal connection of two components or the interaction between two components.

[0029] Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0030] Figure 1 This is a schematic diagram illustrating the light alignment processing of a display panel in related technologies. For example... Figure 1 As shown in Figure (a), UV 2 Technology A aligns the alignment film AL using polarized ultraviolet light L in a vertical alignment manner, causing the liquid crystal molecules LC to generate a predetermined tilt angle.

[0031] Figure 1 The arrows in Figure (b) indicate the direction of ultraviolet light L alignment on the TFT array substrate side (showing the three pixels P). Figure 1 As shown in Figure (b), on the TFT array substrate side, for each pixel P, ultraviolet light L alignment is performed in two regions in the horizontal direction.

[0032] Figure 1 The arrow in diagram (c) indicates the direction of ultraviolet light L alignment on the CF substrate side (showing a pixel P). For example... Figure 1 As shown in Figure (c), on the CF substrate side, for a pixel P, ultraviolet light L alignment is performed in two regions vertically (or longitudinally). On the CF substrate side, there is a laterally extending exposure boundary B between the two exposure regions.

[0033] Figure 1 Figure (d) in the diagram illustrates the light alignment of pixel P from a top-down view, as well as the pretilt angle and dark fringes. For example... Figure 1 As shown in the left part of Figure (d), for a pixel P, four regions are formed corresponding to the photoalignment on the TFT array substrate side and the photoalignment on the CF substrate side. The vertical arrow indicates the photoalignment direction of the alignment film on the TFT array substrate side, and the horizontal arrow indicates the photoalignment direction of the alignment film on the CF substrate side.

[0034] like Figure 1As shown in the right part of Figure (d), the vertical arrow indicates the pretilt direction caused by the alignment film on the TFT array substrate to the liquid crystal molecules LC in the adjacent liquid crystal layer 13, and the horizontal arrow indicates the pretilt direction caused by the alignment film AL on the CF substrate to the liquid crystal molecules LC in the adjacent liquid crystal layer 13.

[0035] Specifically, due to the alignment of ultraviolet light (L) on the TFT array substrate and CF substrate sides in the four regions of each pixel P, the pretilt angle of the liquid crystal molecules (LC) in each region is different. This results in a swastika-shaped dark pattern appearing at the domain junction of ultraviolet light alignment and the edge of pixel P when pixel P is in the bright state. The dark pattern is cross-shaped in the center of pixel P, and occupies half of each of the four edges. Figure 2 This is a schematic diagram illustrating the alignment of the CF substrate and TFT array substrate of a display panel in related technologies, and the presence of vertical misalignment. (Example) Figure 2 As shown in Figure (a), a slit S is provided in the pixel electrode PE of the TFT array substrate to generate an electric field intensity at the slit S, thereby more strongly and stably guiding the liquid crystal molecules.

[0036] When the TFT array substrate and the CF substrate are assembled, if the CF substrate is aligned with the TFT array substrate, such that the lateral exposure boundary B of the UV domain on the CF substrate side is aligned with the boundary of the laterally arranged slits S in the pixel electrode PE on the TFT array substrate side, then the dark lines generated in the pixel P are as follows: Figure 2 As shown in Figure (b).

[0037] However, as Figure 2 As shown in Figure (c), due to limitations in assembly precision during the cell assembly of the TFT array substrate and the CF substrate, a vertical deviation (e.g., 5 micrometers) occurs between the lateral exposure boundary B of the UV Domain on the CF substrate side and the boundary of the laterally arranged slits S on the TFT array substrate side. Figure 2 As shown in Figure (d), more noticeable dark lines are formed in pixel P at the corresponding exposure boundary B (i.e., the elliptical circle), resulting in a decrease in the transmittance of the display panel.

[0038] In response to this, this application provides a display panel and a display device using the display panel to solve the technical problem of transmittance loss caused by misalignment of the TFT array substrate and CF substrate in existing display panels.

[0039] Figure 3 This is a cross-sectional schematic diagram of a display device 100 according to an embodiment of this application. Figure 3 As shown, the display device 100 includes a display panel 10 and a backlight module 20. The backlight module 20 is stacked on top of the display panel 10 and is used to provide backlight for the display panel 10.

[0040] The display panel 10 includes a first substrate 11, a second substrate 12, a liquid crystal layer 13, a first vertical light alignment layer 14, and a second vertical light alignment layer 15.

[0041] The first substrate 11 is a TFT array substrate. Hereinafter, the first substrate 11 is also referred to as a TFT substrate or TFT array substrate. The first substrate 11 includes a first base 111 and pixel electrodes 112 located on the first base 111. The pixel electrodes 112 can be light-transmitting electrodes, for example, formed of transparent conductive materials such as indium tin oxide (ITO), indium zinc oxide (IZO), zinc oxide (ZnO), tin oxide (SnO), or alloys thereof.

[0042] The second substrate 12 is a CF substrate, and the second substrate 12 is disposed opposite to the first substrate 11. The second substrate 12 includes a second base 121 and a common electrode 122 located on the second base 121. The common electrode 122 faces the pixel electrode 112, and by forming a longitudinal electric field between the opposite electrode and the pixel electrode 112, the liquid crystal molecules (LC) are tilted, thereby enabling display.

[0043] The second substrate 12 may include, for example, a lattice-shaped black matrix (not shown) located on the second substrate 121, and color filters (not shown) formed inside the lattice, i.e., pixels P. The black matrix may be formed in a lattice shape for each pixel P in a manner that overlaps with the boundary of the pixel P, but is not limited thereto.

[0044] Color filters can be arranged, for example, in the order of red (R), green (G), blue (B) in each column, or in the order of yellow (Y), red (R), green (G), blue (B), or red (R), green (G), blue (B), green (G).

[0045] The common electrode 122 is a planar electrode. The common electrode 122 can also be a transparent electrode, for example, it can be formed of transparent conductive materials such as indium tin oxide (ITO), indium zinc oxide (IZO), zinc oxide (ZnO), tin oxide (SnO) or their alloys.

[0046] The liquid crystal layer 13 is located between the first substrate 11 and the second substrate 12 and contains liquid crystal molecules LC.

[0047] The first vertical light alignment layer 14 is located between the first substrate 11 and the liquid crystal layer 13. The second vertical light alignment layer 15 is located between the second substrate 12 and the liquid crystal layer 13.

[0048] The display panel 10 also includes a first polarizer 16, a second polarizer 17, and a sealing layer 18. The first polarizer 16 is located on the side of the first substrate 11 opposite to the liquid crystal layer 13. The second polarizer 17 is located on the side of the second substrate 12 opposite to the liquid crystal layer 13. The polarization axes of the first polarizer 16 and the second polarizer 17 can be orthogonal to each other. The sealing layer 18 surrounds the periphery of the liquid crystal layer 13.

[0049] The amount of light transmitted through the display panel 10 is controlled by switching the orientation of the liquid crystal molecules (LC) in the liquid crystal layer 13, as the backlight module 20 incident on the display panel 10. The orientation of the liquid crystal molecules (LC) is switched by applying a voltage to the liquid crystal layer 13 through the pixel electrode 112 and the common electrode 122. When the voltage applied to the liquid crystal layer 13 is less than a threshold voltage (when no voltage is applied), the initial orientation of the liquid crystal molecules (LC) is limited by the first vertical light alignment layer 14 and the second vertical light alignment layer 15.

[0050] Display panel 10 has multiple pixels P (shown in...) Figure 4 (In the middle). The first vertical optical alignment layer 14 and the second vertical optical alignment layer 15 are both optical alignment films that have been oriented (e.g., irradiated with polarized light) in a manner that forms multiple domain regions with different orientations within a region of a pixel P.

[0051] It should be noted that, in the embodiments of this application, the tilt orientation of the liquid crystal molecule LC is described by the orientation vector when the end of the long axis on one side of the first substrate 11 of the liquid crystal molecule LC is taken as the starting point E1 and the end of the long axis on one side of the second substrate 12 is taken as the ending point E2 from the perspective of looking down at the display panel 10.

[0052] Figure 4 for Figure 3 A partial structural diagram of the display panel 10. (See diagram below.) Figure 4 As shown, the TFT substrate of the display panel 10 also includes multiple scan lines SL (one shown), multiple data lines DL (two shown), and multiple thin-film transistors T (one shown).

[0053] Each scan line SL extends along the first direction D1, and multiple scan lines SL are distributed at intervals along the second direction D2.

[0054] Each data line DL extends along the second direction D2, and multiple data lines DL are distributed at intervals along the first direction D1.

[0055] A pixel P is defined in the area where each pair of adjacent data lines DL and each pair of adjacent scan lines SL intersect.

[0056] Multiple pixels P are arranged in an array. Each pixel P includes a thin-film transistor T and a pixel electrode ( Figure 4(Not shown in the diagram). Each thin-film transistor T is electrically connected to a corresponding pixel electrode 112, a corresponding scan line SL, and a corresponding data line DL. The first direction D1 is perpendicular to the second direction D2.

[0057] It should be noted that in the embodiments of this application, the first direction D1 is also referred to as the horizontal direction, left-right direction or horizontal direction, and the second direction D2 is also referred to as the vertical direction, longitudinal direction, vertical direction or up-down direction.

[0058] For each pixel P, the light alignment direction of the TFT substrate is as follows: Figure 4 As shown by the vertical arrow in the image, the photo-alignment direction in the CF substrate is as follows: Figure 4 As shown by the horizontal arrow in the image.

[0059] like Figure 5 As shown in Figure (a), pixel P has multiple domain regions M. The tilt orientations of the liquid crystal molecules LC in the multiple domain regions M are different. The multiple domain regions M are arranged in multiple rows along the first direction D1 and in multiple columns along the second direction D2.

[0060] Each pixel electrode 112 has a plurality of first slits S1. The plurality of first slits S1 are arranged along a second direction D2 and are located at the boundaries of two adjacent domain regions M. The common electrode 122 has a plurality of second slits S2. The plurality of second slits S2 are arranged along a first direction D1 and are located at the boundaries of two adjacent domain regions M.

[0061] Specifically, each pixel P includes four domain regions M. The four domain regions M are arranged in a 2×2 matrix. The four domain regions M include the first domain region M1, the second domain region M2, the third domain region M3, and the fourth domain region M4.

[0062] The first domain region M1 and the second domain region M2 are arranged in the first row along the first direction D1. The third domain region M3 and the fourth domain region M4 are arranged in the second row along the first direction D1.

[0063] The first domain region M1 and the third domain region M3 are arranged in the first column along the second direction D2. The second domain region M2 and the fourth domain region M4 are arranged in the second column along the second direction D2.

[0064] Part of the first slit S1 is located in the region of the second domain M2 near the first domain M1, and part of the first slit S1 is located in the region of the fourth domain M4 near the third domain M3.

[0065] Part of the second slit S2 is located in the region of the first domain M1 near the fourth domain M4, and part of the second slit S2 is located in the region of the third domain M3 near the second domain M2.

[0066] The first slit S1 located in the second domain region M2 is offset from the first slit S1 located in the third domain region M3 in the first direction D1, and the second slit S2 located in the first domain region M1 is offset from the second slit S2 located in the fourth domain region M4 in the second direction D2.

[0067] Therefore, by providing a first slit S1 arranged along the second direction D2 (i.e., vertical) on the pixel electrode 112 of the first substrate 11, and a second slit S2 arranged along the first direction D1 (i.e., horizontal) on the common electrode 122 of the second substrate 12, the tilt orientation of the multi-domain region M liquid crystal molecules LC is controlled. Furthermore, by placing the first slit S1 at the boundary of two adjacent columns of domain regions M, and the second slit S2 at the boundary of two adjacent rows of domain regions M, dark lines caused by misalignment between the CF substrate and the TFT array substrate are avoided, maintaining good transmittance.

[0068] Furthermore, the arrangement of the four domain regions M in the domain region M structure of pixel P (first domain region M1, second domain region M2, third domain region M3 and fourth domain region M4), as well as the positional relationship of the first slit S1 and the second slit S2 in these domain regions M, helps to form a more stable multi-domain structure, thereby obtaining a better wide viewing angle and transmittance.

[0069] Specifically, pixel P is roughly rectangular, with the first direction D1 being the direction of the short side of pixel P and the second direction D2 being the direction of the long side of pixel P. The first slit S1 in the second domain region M2 and the first slit S1 in the fourth domain region M4 are adjacent to the center line of the short side of pixel P and are located on opposite sides of the center line of the short side of pixel P.

[0070] The second slit S2 in the first domain region M1 and the second slit S2 in the third domain region M3 are adjacent to the center line of the long side of pixel P and are located on opposite sides of the center line of the long side of pixel P.

[0071] Therefore, for the slit S layout of rectangular pixel P, the slit S is connected with the edge and center line of pixel P, which optimizes the electric field distribution, is easy to implement, helps to reduce dark lines at the boundary of domain region M, increases the effective light-transmitting area of ​​pixel P, and enhances the display brightness.

[0072] In other embodiments, Figure 5 As shown in Figure (c), when there is an alignment deviation between the TFT substrate and the CF substrate, the arrangement of the second slit S2 is close to the center line C of the long side of the pixel P (shown as a dashed line). However, the second slit S2 in the first domain region M1 and the second slit S2 in the third domain region M3 are not symmetrical about the center line C of the long side of the pixel P.

[0073] In other words, the center line C of the long side of pixel P is not strictly located between the second slit S2 in the first domain region M1 and the second slit S2 in the third domain region M3, but is relatively closer to the second slit S2 in the first domain region M1, or even closer to the second slit S2 in the first domain region M1.

[0074] Figure 5 Figures (b) and (d) in the text correspond to respectively Figure 5 The diagrams (a) and (c) show schematic representations of the black lines generated by pixel P. Figure 5 As shown in Figures (a) and (c), since the lateral exposure boundary B of the UV Domain on the CF substrate side is always aligned with the boundary of the second slit S2 of the common electrode 122 on the CF substrate side, even if the TFT substrate and the CF substrate are offset along the second direction D2 during alignment, causing the lateral exposure boundary B of the UV Domain to deviate from the center line of the long side direction of the pixel P, no obvious dark pattern change will occur, so that the transmittance of the display panel 10 remains basically unchanged.

[0075] In other embodiments, the number of domain regions M in each pixel P is not limited to the above, for example, the number of domain regions M in each pixel P is eight, in order to further expand the viewing angle.

[0076] In some embodiments, when the orientation along the first direction D1 is defined as 0°, the first domain region M1, the second domain region M2, the third domain region M3 and the fourth domain region M4 have an inclination orientation that is substantially any one of 45°, 135°, 225° and 315°.

[0077] Therefore, the tilt azimuth angles of the four domain regions M (45°, 135°, 225°, 315°) are conducive to achieving a balanced viewing angle characteristic in all directions, reducing brightness and color changes at specific viewing angles.

[0078] In some embodiments, when a voltage is applied to the liquid crystal layer 13, the tilt orientations of the liquid crystal molecules LC in adjacent domain regions M in each pixel P are orthogonal.

[0079] Therefore, the adjacent domain M liquid crystal molecules are orthogonally arranged in tilted orientation. This orthogonal design helps to achieve more uniform viewing angle characteristics and reduce color shift.

[0080] Specifically, when a voltage is applied to the liquid crystal layer 13, the tilt directions of the liquid crystal molecules LC in each pixel P along the clockwise direction of the first domain region M1, the second domain region M2, the third domain region M3 and the fourth domain region M4 are orthogonal.

[0081] In some embodiments, the extension direction of the first slit S1 and the extension direction of the second slit S2 are parallel to the tilt orientation of the liquid crystal molecules LC in their respective domain regions M.

[0082] Therefore, the extension direction of the slit S is parallel to the tilt orientation of the liquid crystal molecules LC, which helps to guide the alignment of the liquid crystal molecules LC, forming a more stable multi-domain structure, thereby obtaining a better wide viewing angle and display effect.

[0083] Specifically, the first slit S1 and the second slit S2 are both elliptical. The extension direction of the first slit S1 is the direction of the major axis of the ellipse, and the extension direction of the second slit S2 is the direction of the major axis of the ellipse.

[0084] Therefore, these shapes are easy to manufacture, while ensuring good electric field control. Moreover, the elliptical shape can reduce stress concentration and improve reliability.

[0085] In other embodiments, the shapes of the first slit S1 and / or the second slit S2 are not limited to those described above, and may also be rectangular, trapezoidal, hexagonal, V-shaped, Z-shaped, etc.

[0086] In some embodiments, the projections of the first slit S1 onto the first substrate 11 and the second slit S2 onto the first substrate 11 do not overlap along the thickness direction of the display panel 10. This avoids electric field interference, improves the accuracy of electric field control, and reduces light transmittance loss.

[0087] Figure 6 This is a schematic diagram of a pixel electrode and a common electrode corresponding to a pixel in a display panel according to another embodiment of this application. Figure 5 The display panel 10 shown in Figure (a) is different in that... Figure 6 In the illustrated embodiment, among the plurality of first slits S1, some of the first slits S1 are located in the region of the first domain region M1 that is far from the second domain region M2, and some of the first slits S1 are located in the region of the third domain region M3 that is far from the fourth domain region M4.

[0088] Among the multiple second slits S2, some second slits S2 are located in the region of the second domain M2 far from the third domain M3, and some second slits S2 are located in the region of the fourth domain M4 far from the first domain M1.

[0089] Therefore, the first slit S1 and the second slit S2 in the four domain regions M are basically set to correspond to the dark pattern area, forming a complete electric field control network, which further optimizes the arrangement of liquid crystal molecules LC and helps to improve the contrast and response speed of the display panel 10.

[0090] Specifically, the first slit S1 in the first domain region M1 and the first slit S1 in the third domain region M3 are respectively set along the two long sides of pixel P. The second slit S2 in the second domain region M2 and the second slit S2 in the fourth domain region M4 are respectively set along the two short sides of pixel P.

[0091] In some embodiments, the number of slits S in each domain region M may be increased or decreased, and / or the width of the slits S may be adjusted, and / or the spacing between the slits S may be adjusted, in order to adjust the alignment and transmittance of the liquid crystal molecules LC and optimize the response speed of the liquid crystal molecules LC.

[0092] In summary, in the display panel and display device of this application embodiment, the slits of the pixel electrodes on the TFT substrate side are designed to be arranged vertically and periodically, while the slits of the common electrodes on the CF substrate side are designed to be arranged horizontally and periodically. Even if there is misalignment between the TFT array substrate and the CF substrate during assembly, it can be ensured that the exposure boundary of the UV domain on the CF substrate side is always aligned with the slits of the common electrodes on the CF substrate side, thereby avoiding a decrease in transmittance. This is beneficial for solving UV... 2 In liquid crystal display panels using technology A, the dark pattern problem caused by the assembly precision limitations of the TFT array substrate and CF substrate is eliminated, thereby improving the transmittance of the display panel.

[0093] The above embodiments are only used to illustrate the technical solutions of this application and are not intended to limit it. Although this application has been described in detail with reference to the above preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions to the technical solutions of this application should not depart from the spirit and scope of the technical solutions of this application.

Claims

1. A display panel, characterized by, include: The first substrate has multiple pixel electrodes; The second substrate is disposed opposite to the first substrate and has a common electrode; A liquid crystal layer is located between the first substrate and the second substrate and contains liquid crystal molecules; A first vertical light alignment layer is located between the first substrate and the liquid crystal layer; as well as A second vertical light alignment layer is located between the second substrate and the liquid crystal layer; The display panel has multiple pixels, each pixel has multiple domain regions, and the tilt orientation of the liquid crystal molecules in the multiple domain regions is different from each other. The plurality of domain regions are arranged in multiple rows along a first direction and in multiple columns along a second direction, wherein the first direction is perpendicular to the second direction; Each pixel electrode corresponds to one pixel setting, and each pixel electrode has a plurality of first slits arranged along the second direction and located at the boundary of two adjacent columns of domain regions; The common electrode has a plurality of second slits arranged along the first direction and located at the boundary of two adjacent rows of the domain regions.

2. The display panel according to claim 1, characterized in that, The plurality of domain regions includes a first domain region, a second domain region, a third domain region, and a fourth domain region; The first domain region and the second domain region are arranged in a first row along the first direction; The third domain region and the fourth domain region are arranged in a second row along the first direction; The first domain region and the third domain region are arranged in a first column along the second direction; The second domain region and the fourth domain region are arranged in a second column along the second direction; Part of the first slit is located in the region of the second domain region that is close to the first domain region. A portion of the first slit is located in the region of the fourth domain region near the third domain region; Part of the second slit is located in the region of the first domain region near the fourth domain region. Part of the second slit is located in the region of the third domain region that is close to the second domain region.

3. The display panel according to claim 2, characterized in that, The pixel is rectangular, the first direction is the direction of the short side of the pixel, and the second direction is the direction of the long side of the pixel; The first slit in the second domain region and the first slit in the fourth domain region are adjacent to the center line of the short side of the pixel and are located on opposite sides of the center line of the short side of the pixel, respectively. The second slit in the first domain region and the second slit in the third domain region are adjacent to the center line of the long side of the pixel and are located on opposite sides of the center line of the long side of the pixel, respectively.

4. The display panel according to claim 2, characterized in that, Part of the first slit is located in the region of the first domain region that is far from the second domain region. A portion of the first slit is located in the region of the third domain region that is far from the fourth domain region; Part of the second slit is located in the region of the second domain region that is far from the third domain region. Part of the second slit is located in the region of the fourth domain that is far from the first domain.

5. The display panel according to claim 4, characterized in that, The pixel is rectangular, the first direction is the direction of the short side of the pixel, and the second direction is the direction of the long side of the pixel; The first slit in the first domain region and the first slit in the third domain region are respectively arranged along the two long sides of the pixel; The second slit in the second domain region and the second slit in the fourth domain region are respectively arranged along the two short sides of the pixel.

6. The display panel according to any one of claims 1 to 5, characterized in that, The extension direction of the first slit and the extension direction of the second slit are parallel to the tilt orientation of the liquid crystal molecules in the domain region they are located in.

7. The display panel according to any one of claims 1 to 5, characterized in that, When a voltage is applied to the liquid crystal layer, the tilt orientations of liquid crystal molecules in adjacent domain regions within each pixel are orthogonal.

8. The display panel according to any one of claims 1 to 5, characterized in that, When the orientation along the first direction is defined as 0°, the first domain region, the second domain region, the third domain region, and the fourth domain region each have an inclination orientation of 45°, 135°, 225°, and 315°, respectively.

9. The display panel according to any one of claims 1 to 5, characterized in that, The first slit is elliptical or rectangular, and the second slit is elliptical or rectangular.

10. A display device, characterized by comprising: include: The display panel according to any one of claims 1 to 9; as well as A backlight module is stacked on top of the display panel to provide backlight for the display panel.

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