Liquid crystal display panel and liquid crystal display device

Abstract

The utility model relates to a liquid crystal display panel and a liquid crystal display device. The liquid crystal display panel comprises a first substrate, a second substrate and a liquid crystal layer, wherein the first substrate and the second substrate are oppositely arranged; the liquid crystal layer is clamped between the first substrate and the second substrate; the first substrate comprises a first substrate layer and a plurality of data lines located on the side, close to the liquid crystal layer, of the first substrate layer, and the data lines extend in the first direction; the second substrate comprises a second substrate layer and a light shielding layer located on the side, close to the liquid crystal layer, of the second substrate layer, and the light shielding layer comprises a plurality of first light shielding strips arranged in one-to-one correspondence with the data lines; the data lines and the corresponding first shading strips are overlapped in the thickness direction of the liquid crystal display panel; each first shading strip is provided with at least one opening, and the liquid crystal layers on the two opposite sides of each first shading strip communicate with each other through the openings. The display grade of the liquid crystal display panel can be improved on the basis of improving the contrast ratio of the liquid crystal display panel.

Description

Technical Field

[0001] This application relates to the field of display technology, and in particular to a liquid crystal display panel and a liquid crystal display device. Background Technology

[0002] Display technology is developing rapidly, and liquid crystal displays (LCDs), with their advantages of low-voltage operation, no radiation scattering, light weight, and small size, have been widely used in the market for many years and remain the mainstream display. According to the classification of LCDs, the LCD devices currently on the market are mainly divided into fringe field switching (FFS) LCDs and vertically aligned (VA) LCDs. FFS LCDs have wide viewing angles, while VA LCDs have a significant advantage in contrast ratio; for example, the contrast ratio of VA LCDs can typically reach over 6000. High contrast ratio helps to enhance the visual impact and three-dimensionality of the image, making the image more vivid and layered. It also reduces the halo effect of Mini-LED backlighting, reduces the number of zones, and lowers module costs.

[0003] To further improve the contrast ratio (CR) and extend the contrast advantage of VA-type LCD monitors, adding a black matrix (BM) above the data lines is the most effective method to reduce light leakage in the L0 (0 grayscale) dark state. This method allows VA-type LCD monitors to achieve a contrast ratio of over 7000. However, when BMs are present above both the data lines and the scan lines, the liquid crystal diffusion is obstructed in all directions, resulting in poor liquid crystal flow. When the screen is wiped, tapped, pressed, or shaken, the BMs shift, causing moving muras in the L0 dark state, mainly manifested as elliptical muras, which severely affect the display quality. Therefore, these problems limit the application of adding BMs above the data lines, thus limiting the improvement of contrast ratio in VA-type LCD monitors. Utility Model Content

[0004] This application provides a liquid crystal display panel and a liquid crystal display device, which can improve the display quality of the liquid crystal display panel by increasing its contrast.

[0005] To achieve the above objectives, according to a first aspect of this application, a liquid crystal display panel is provided, comprising a first substrate and a second substrate disposed opposite to each other, and a liquid crystal layer sandwiched between the first substrate and the second substrate;

[0006] The first substrate includes a first substrate layer and a driving circuit layer located on the side of the first substrate layer near the liquid crystal layer. The driving circuit layer includes a plurality of data lines that extend along a first direction.

[0007] The second substrate includes a second substrate layer and a light-shielding layer located on the side of the second substrate layer close to the liquid crystal layer. The light-shielding layer includes a plurality of first light-shielding strips arranged in a one-to-one correspondence with the plurality of data lines. The data lines and the corresponding first light-shielding strips are arranged overlapping each other in the thickness direction of the liquid crystal display panel.

[0008] Each of the first light-shielding strips has at least one opening, through which the liquid crystal layers located on opposite sides of the first light-shielding strips can communicate with each other.

[0009] In some embodiments, the liquid crystal display panel has a plurality of sub-pixel areas arranged in multiple rows and columns; a data line and a first light-shielding strip are provided between any two adjacent columns of the sub-pixel areas; each sub-pixel area has at least one opening on the side near the data line;

[0010] The first substrate further includes an electrode layer located on the side of the driving circuit layer near the liquid crystal layer; the electrode layer includes a pixel electrode located in the sub-pixel region, and the pixel electrode includes at least one first main electrode extending along a second direction, the second direction being perpendicular to the first direction;

[0011] The number of openings located on the side of the sub-pixel region near the data line is less than or equal to the number of the first main electrodes in the sub-pixel region; in the second direction, the projection of any one of the openings in the thickness direction of the liquid crystal display panel is aligned with the projection of a corresponding first main electrode in the sub-pixel region in the thickness direction of the liquid crystal display panel.

[0012] In some embodiments, each pixel electrode includes a first main electrode and a second main electrode, the second main electrode extending along the first direction; the second main electrode is in the same layer as the adjacent first main electrode and is arranged to cross each other.

[0013] The sub-pixel area has only one opening on the side near the data line. In the second direction, the projection of the opening in the thickness direction of the liquid crystal display panel is aligned with the projection of the first main electrode in the corresponding sub-pixel area in the thickness direction of the liquid crystal display panel.

[0014] In some embodiments, the sub-pixel region includes a main pixel region and a sub-pixel region disposed adjacent to each other in the first direction; the pixel electrode includes a first sub-pixel electrode located in the main pixel region and a second sub-pixel electrode located in the sub-pixel region;

[0015] The first sub-pixel electrode includes a first main electrode and a third main electrode, and the second sub-pixel electrode includes a first main electrode and a fourth main electrode. The third main electrode and the fourth main electrode both extend along the first direction. The third main electrode is on the same layer as the adjacent first main electrode and is arranged to cross each other, and the fourth main electrode is on the same layer as the adjacent first main electrode and is arranged to cross each other.

[0016] The sub-pixel area has only one opening on the side near the data line. In the second direction, the projection of the opening in the thickness direction of the liquid crystal display panel is aligned with the projection of the first main electrode in the corresponding main pixel area or sub-pixel area in the thickness direction of the liquid crystal display panel.

[0017] In some embodiments, the sub-pixel region includes a main pixel region and a sub-pixel region disposed adjacent to each other in the first direction; the pixel electrode includes a first sub-pixel electrode located in the main pixel region and a second sub-pixel electrode located in the sub-pixel region;

[0018] The first sub-pixel electrode includes a first main electrode and a third main electrode, and the second sub-pixel electrode includes a first main electrode and a fourth main electrode. The third main electrode and the fourth main electrode both extend along the first direction. The third main electrode is on the same layer as the adjacent first main electrode and is arranged to cross each other, and the fourth main electrode is on the same layer as the adjacent first main electrode and is arranged to cross each other.

[0019] The sub-pixel area has two openings on the side near the data line. In the second direction, the projections of the two openings in the thickness direction of the liquid crystal display panel are respectively aligned with the projections of the first main electrode in the corresponding main pixel area and the sub-pixel area in the thickness direction of the liquid crystal display panel.

[0020] In some embodiments, the opening is symmetrically arranged about a first axis of symmetry extending along the second direction, and the first main electrode in the sub-pixel region corresponding to the opening is symmetrically arranged about a second axis of symmetry extending along the second direction.

[0021] In the thickness direction of the liquid crystal display panel, the first axis of symmetry and the second axis of symmetry are arranged to coincide.

[0022] In some embodiments, in the first direction, the ratio between the length of the opening and the length of the corresponding sub-pixel region is greater than 0.05.

[0023] In some embodiments, in the thickness direction of the liquid crystal display panel, the depth of the opening is greater than 0 and less than or equal to the thickness of the first light-shielding strip.

[0024] In some embodiments, the driving circuit layer further includes a plurality of scan lines located on the side of the first substrate layer near the liquid crystal layer, the scan lines extending along the second direction; each row of the sub-pixel area corresponds to at least one scan line;

[0025] The light-shielding layer also includes a plurality of second light-shielding strips, which are aligned one-to-one with the plurality of scan lines; the scan lines and the corresponding second light-shielding strips are overlapped in the thickness direction of the liquid crystal display panel; the first light-shielding strips and the second light-shielding strips are in the same layer and are arranged to cross each other.

[0026] According to a second aspect of this application, a liquid crystal display device is provided, the liquid crystal display device comprising the liquid crystal display panel described above.

[0027] In the liquid crystal display panel and liquid crystal display device of this application embodiment, by providing a first light-shielding strip above the data line, the problem of light leakage in the edge area of ​​the data line under the L0 dark state can be solved, thereby improving the contrast of the liquid crystal display panel. Furthermore, by providing an opening in the first light-shielding strip, the fluidity of the liquid crystal layer located on both sides of the first light-shielding strip can be improved, thereby solving the problem of uneven display movement in the edge area of ​​the data line under the L0 dark state, thus improving the problem of elliptical uneven display and enhancing the display quality of the liquid crystal display panel. Therefore, the embodiments of this application can improve the display quality of the liquid crystal display panel while increasing its contrast.

[0028] Other features and advantages of this application will be described in detail in the following detailed description section. Attached Figure Description

[0029] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0030] To gain a more complete understanding of this application and its beneficial effects, the following description will be provided in conjunction with the accompanying drawings, wherein the same reference numerals in the following description denote the same parts.

[0031] Figure 1 This is a top view schematic diagram of an exemplary liquid crystal display panel, specifically a BM.

[0032] Figure 2 This is a top view schematic diagram of another BM in an exemplary liquid crystal display panel;

[0033] Figure 3 This is a schematic cross-sectional view of a liquid crystal display panel provided in an embodiment of this application;

[0034] Figure 4 This is a top view schematic diagram of the light-shielding layer in the liquid crystal display panel provided in the embodiments of this application;

[0035] Figure 5 This is a top view schematic diagram of a light-shielding layer and pixel electrode in a liquid crystal display panel provided in an embodiment of this application;

[0036] Figure 6 This is a top view schematic diagram of another light-shielding layer and pixel electrode in the liquid crystal display panel provided in the embodiments of this application;

[0037] Figure 7 This is a top view schematic diagram of a single sub-pixel region where the opening on the light-shielding layer does not correspond to the first main electrode of the pixel electrode, as provided in the embodiments of this application.

[0038] Figure 8 yes Figure 7 The diagram shows the alignment of the liquid crystal layer corresponding to the structure shown.

[0039] Figure 9 yes Figure 7 and Figure 8 A schematic diagram showing the light transmission effect corresponding to the structure shown;

[0040] Figure 10 This is a top view schematic diagram of the opening on the light-shielding layer in a single sub-pixel area provided in the embodiments of this application, which corresponds to the first main electrode of the pixel electrode.

[0041] Figure 11 yes Figure 10 The diagram shows the alignment of the liquid crystal layer corresponding to the structure shown.

[0042] Figure 12 yes Figure 10 and Figure 11 The diagram shows the light transmission effect corresponding to the structure shown. Detailed Implementation

[0043] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the protection scope of this application.

[0044] Typically, a liquid crystal display panel includes an array substrate and a color filter substrate disposed opposite each other, and a liquid crystal layer sandwiched between the array substrate and the color filter substrate. The array substrate includes multiple scan lines extending in a horizontal direction (e.g., the X direction) and multiple data lines extending in a vertical direction (e.g., the Y direction); the scan lines and data lines intersect each other and are insulated from each other, defining multiple sub-pixel areas. The color filter substrate includes a substrate layer and a black matrix (BM) disposed on the side of the substrate layer near the liquid crystal layer.

[0045] like Figure 1 As shown, when BM1 is only horizontally positioned to cover the scan lines (not shown) and their edge areas, BM1 cannot cover the data lines 2 and their edge areas. The liquid crystal layer in each sub-pixel area 3 is not blocked by BM1 in the horizontal direction, but is only blocked in the vertical direction, resulting in high fluidity of the liquid crystal layer. However, light leakage will occur at the edges of the data lines 2 in the L0 dark state, leading to a decrease in the contrast of the liquid crystal display panel.

[0046] like Figure 2 As shown, when BM1' is simultaneously set to correspond to both the scan line and the data line 2, it can effectively block the L0 dark-state light leakage phenomenon at the edges of the data line 2 and the scan line, thereby improving the contrast of the liquid crystal display panel and further expanding the contrast advantage of the VA-type liquid crystal display panel. However, this design causes the liquid crystal layer in each sub-pixel area 3 to be obstructed by BM1' on all four sides, resulting in poor fluidity of the liquid crystal layer at the BM1' position. When the screen is wiped, tapped, pressed, or shaken, BM1' will change, causing the liquid crystal layer to flow. When the external force is removed, the liquid crystal layer cannot return to its initial state due to its poor fluidity, resulting in L0 dark-state light leakage at the edges of BM1', forming an elliptical mura, which seriously affects the appearance of the liquid crystal display panel.

[0047] To address the aforementioned technical problems, this application provides a liquid crystal display panel and a liquid crystal display device. The liquid crystal display panel provided in this application retains the matrix above the data lines, significantly improving the contrast of the liquid crystal display panel. Simultaneously, an opening is provided on the BM corresponding to the data lines, effectively improving the fluidity of the liquid crystal layer and thus solving the L0 dark state migration (Mura) problem at the edge of the BM. Furthermore, to address the misalignment problem caused by the opening on the BM, this application also precisely designs the position of the opening, as described in the following embodiments.

[0048] Combination Figure 3 and Figure 4 As shown, this application embodiment provides a liquid crystal display panel 10, which includes a first substrate 11 and a second substrate 12 disposed opposite to each other, and a liquid crystal layer 13 sandwiched between the first substrate 11 and the second substrate 12. The first substrate 11 includes a first substrate layer 14 and a driving circuit layer 15 located on the side of the first substrate layer 14 near the liquid crystal layer 13. The driving circuit layer 15 includes a plurality of data lines 16, and the data lines 16 extend along a first direction (e.g., the Y direction). The second substrate 12 includes a second substrate layer 17 and a light-shielding layer 18 located on the side of the second substrate layer 17 near the liquid crystal layer 13. The light-shielding layer 18 includes a plurality of first light-shielding strips 18a disposed one-to-one with the plurality of data lines 16. The data lines 16 and the corresponding first light-shielding strips 18a are overlapped in the thickness direction of the liquid crystal display panel 10. Each first light-shielding strip 18a has at least one opening 19, and in a second direction (e.g., the X direction), the liquid crystal layers 13 located on opposite sides of the first light-shielding strip 18a communicate with each other through the openings 19.

[0049] It should be noted that the thickness direction of the liquid crystal display panel 10 refers to the direction perpendicular to the display surface of the liquid crystal display panel 10, and the projection of the data line 16 in the thickness direction of the liquid crystal display panel 10 is located within the projection of the corresponding first light-shielding strip 18a in the thickness direction of the liquid crystal display panel 10.

[0050] and Figure 1 and Figure 2 Compared to the BM structure shown, this embodiment of the application provides an opening 19 on each first light-shielding strip 18a. While ensuring the first light-shielding strip 18a effectively shields the edges of the data line 16, it also allows the liquid crystal layer 13 on both sides of the first light-shielding strip 18a to flow through the opening 19, thereby improving the horizontal flowability of the liquid crystal layer 13. Therefore, this embodiment of the application can improve the L0 dark state moving mura problem in the edge area of ​​the data line 16 while increasing the contrast of the liquid crystal display panel 10.

[0051] Understandably, L0 dark state motion display unevenness refers to the uneven motion display phenomenon that occurs in L0 dark state, mainly manifested as elliptical mura.

[0052] In some embodiments, the first substrate 11 is an array substrate, and the second substrate 12 is a color filter substrate or an opposing substrate without a color filter. When the second substrate 12 is an opposing substrate, the color filter is disposed on the array substrate. In this case, the first substrate 11 is a color filter on array (COA) type array substrate.

[0053] It should be noted that, Figure 3 The color filter is not shown in the image, and this application does not limit the specific location of the color filter.

[0054] In some embodiments, the width of the first light-shielding strip 18a is greater than the width of the data line 16, so that the first light-shielding strip 18a can effectively cover the edge area of ​​the data line 16, avoid the L0 dark state light leakage problem in the edge area of ​​the data line 16, thereby improving the contrast of the liquid crystal display panel 10.

[0055] In some embodiments, the liquid crystal display panel 10 is a VA type liquid crystal display panel. Therefore, by providing a first light-shielding strip 18a above the data line 16, the contrast advantage of the VA type liquid crystal display panel can be enhanced. Furthermore, by providing an opening 19 on the first light-shielding strip 18a, the elliptical mura problem caused by stress on the panel can be effectively solved while enhancing the contrast advantage of the VA type liquid crystal display panel.

[0056] In some embodiments, in the thickness direction of the liquid crystal display panel 10, the depth of the opening 19 is greater than 0 and less than or equal to the thickness of the first light-shielding strip 18a. That is, the opening 19 can disconnect the first light-shielding strip 18a, or it can remain connected, as long as the liquid crystal layers 13 located on opposite sides of the first light-shielding strip 18a can circulate between each other through the opening 19.

[0057] Understandably, when the depth of the opening 19 is less than the thickness of the first light-shielding strip 18a, the opening 19 on the first light-shielding strip 18a becomes a groove structure, which can improve the fluidity of the liquid crystal layer 13 on both sides of the first light-shielding strip 18a and retain the light-shielding performance at the opening 19 position; when the depth of the opening 19 is equal to the thickness of the first light-shielding strip 18a, the first light-shielding strip 18a breaks at the opening 19, which can further improve the fluidity of the liquid crystal layer 13 on both sides of the first light-shielding strip 18a.

[0058] For ease of description, this application embodiment will be described using the example of opening 19 disconnecting the first light-shielding strip 18a.

[0059] In some embodiments, the liquid crystal display panel 10 has a plurality of sub-pixel areas 20 arranged in multiple rows and columns. Each column of sub-pixel areas 20 is arranged sequentially along a first direction (Y direction), and each row of sub-pixel areas 20 is arranged sequentially along a second direction (X direction), with the first and second directions being perpendicular to each other. A data line 16 and a first light-shielding strip 18a are provided between any two adjacent columns of sub-pixel areas 20. Each sub-pixel area 20 has at least one opening 19 on the side near the data line 16.

[0060] In one specific embodiment, the first direction is the vertical direction and the second direction is the horizontal direction, but it is not limited to this.

[0061] Specifically, for ease of description, each first light-shielding strip 18a is divided into multiple light-shielding parts 181 connected in sequence. Multiple light-shielding parts 181 on the same first light-shielding strip 18a are arranged one-to-one with multiple sub-pixel areas 20 in the same column, and each light-shielding part 181 is provided with at least one opening 19.

[0062] Understandably, the light-shielding part 181 is located on the side of the sub-pixel area 20 near the data line 16. For example, a light-shielding part 181 is provided between two adjacent sub-pixel areas 20 in the second direction. Through the opening 19 on the light-shielding part 181, the liquid crystal layer 13 in the two adjacent sub-pixel areas 20 in the second direction can circulate with each other, thereby improving the fluidity of the liquid crystal layer 13 in the second direction.

[0063] It should be noted that the opening 19 on the light-shielding part 181 refers to the opening 19 located on the side of the sub-pixel area 20 near the data line 16.

[0064] like Figure 4 As shown, the driving circuit layer 15 also includes multiple scan lines 21 located on the side of the first substrate layer 14 near the liquid crystal layer 13. The scan lines 21 extend along a second direction, and each row of sub-pixel areas 20 corresponds to at least one scan line 21. The light-shielding layer 18 also includes multiple second light-shielding strips 18b, which are aligned one-to-one with the multiple scan lines 21. The scan lines 21 and the corresponding second light-shielding strips 18b are overlapped in the thickness direction of the liquid crystal display panel 10. The first light-shielding strips 18a and the second light-shielding strips 18b are on the same layer and intersect each other.

[0065] Understandably, the projection of the scan line 21 in the thickness direction of the liquid crystal display panel 10 is located within the projection of the second light-shielding strip 18b in the thickness direction of the liquid crystal display panel 10.

[0066] In some embodiments, the width of the second light-shielding strip 18b is greater than the width of the scan line 21, so that the second light-shielding strip 18b can effectively cover the edge area of ​​the scan line 21, avoiding the L0 dark state light leakage problem in the edge area of ​​the scan line 21, thereby improving the contrast of the liquid crystal display panel 10.

[0067] Understandably, by setting a first light-shielding strip 18a above the data line 16 and a second light-shielding strip 18b above the scan line 21, with the first light-shielding strip 18a and the second light-shielding strip 18b on the same layer and intersecting each other, the wiring area around each sub-pixel area 20 is blocked by the light-shielding layer 18, which can effectively improve the contrast of the liquid crystal display panel 10.

[0068] It should be noted that since a support post (PS) is usually provided on the second light-shielding strip 18b, the embodiment of this application does not provide an opening 19 on the second light-shielding strip 18b. However, the technical solution of providing an opening 19 on the second light-shielding strip 18b is also within the protection scope of this application.

[0069] In some embodiments, such as Figure 4 As shown, in the first direction (Y direction), the ratio between the length L1 of the opening 19 on the light-shielding portion 181 and the length L2 of the corresponding sub-pixel area 20 is greater than 0.05. By limiting the length of the opening 19 in the first direction, the light-shielding effect of the light-shielding portion 181 can be guaranteed while ensuring the flow performance of the liquid crystal layer 13 at the opening 19 position.

[0070] In one specific embodiment, in the first direction, the length of the opening 19 on the light-shielding portion 181 is greater than 10 micrometers.

[0071] In a preferred embodiment, in the first direction, the length of the opening 19 on the light-shielding portion 181 is greater than 16 micrometers.

[0072] In some embodiments, combined with Figure 3 , Figure 5 and Figure 6 As shown, the first substrate 11 further includes an electrode layer 22 located on the side of the driving circuit layer 15 near the liquid crystal layer 13; the electrode layer 22 includes a pixel electrode 22a located in the sub-pixel region 20, and the pixel electrode 22a includes at least one first main electrode 221 extending along the second direction. The number of openings 19 on the light-shielding portion 181 is less than or equal to the number of first main electrodes 221 in the corresponding sub-pixel region 20. In the second direction, the projection of any opening 19 on the light-shielding portion 181 in the thickness direction of the liquid crystal display panel 10 is aligned with the projection of a first main electrode 221 in the corresponding sub-pixel region 20 in the thickness direction of the liquid crystal display panel 10.

[0073] In other words, the number of openings 19 located on the side of the sub-pixel area 20 near the data line 16 is less than or equal to the number of first main electrodes 221 in the sub-pixel area 20; in the second direction, the projection of any opening 19 in the thickness direction of the liquid crystal display panel 10 is aligned with the projection of a corresponding first main electrode 221 in the thickness direction of the liquid crystal display panel 10.

[0074] It should be noted that the first main electrode 221 is located in the non-edge region of the sub-pixel region 20. For example, the first main electrode 221 is located near or in the middle region of the sub-pixel region 20.

[0075] like Figure 5 As shown, to expand the viewing angle of a VA-type liquid crystal display panel, the pixel electrode 22a typically employs a 4-domain design, separating adjacent domain areas through horizontal trunk (H-trunk) electrodes and vertical trunk (V-trunk) electrodes. Figure 6 As shown, in order to meet the higher requirements of viewing angle, the pixel electrode 22a can also adopt an 8-domain design.

[0076] Although setting an opening 19 on the first light-shielding strip 18a can solve the flow problem of the liquid crystal layer 13 on both sides of the first light-shielding strip 18a, if the position of the opening 19 is not properly selected, it will directly affect the alignment of the liquid crystal layer 13, resulting in a decrease in the transmittance of the sub-pixel area 20.

[0077] Combination Figure 7 , Figure 8 and Figure 9 As shown, when the opening 19 corresponds to the domain region, the liquid crystal 24 near the first light-shielding strip 18a tilts towards the opening 19 region, exhibiting either the same or opposite orientation as the liquid crystal 24 in the domain region. For example, the tilting direction of the liquid crystal 24 on one side of the opening 19 is the same as that of the liquid crystal 24 in the adjacent domain region, and this part of the liquid crystal 24 is aligned according to line (a); while the tilting direction of the liquid crystal 24 on the other side of the opening 19 is opposite to that of the liquid crystal 24 in the adjacent domain region, and this part of the liquid crystal 24 is aligned according to line (b). The area where the reverse line (b) is located has a transition region aligned towards the second direction, and the azimuth angle of the liquid crystal 24 in the transition region is close to 0°, which is an alignment dark pattern region, thus affecting the transmittance of the sub-pixel region 20.

[0078] In order to avoid the problem of reduced transmittance caused by the alignment problem of liquid crystal 24, the embodiment of this application has precisely controlled the setting position of the opening 19, as described below.

[0079] In one specific implementation, such as Figure 5As shown, the pixel electrode 22a adopts a 4-domain design. Specifically, each pixel electrode 22a includes a first trunk electrode (i.e., an H-trunk electrode) 221 and a second trunk electrode (i.e., a V-trunk electrode) 222. The second trunk electrode 222 extends along a first direction and is arranged on the same layer as the adjacent first trunk electrode 221 and intersects with each other. The light-shielding part 181 has only one opening 19. In a second direction, the projection of the opening 19 in the thickness direction of the liquid crystal display panel 10 is aligned with the projection of the first trunk electrode 221 in the corresponding sub-pixel area 20 in the thickness direction of the liquid crystal display panel 10.

[0080] like Figure 10 , Figure 11 and Figure 12 As shown, when the projection of the opening 19 in the thickness direction of the liquid crystal display panel 10 is aligned with the projection of the first main electrode 221 in the corresponding sub-pixel area 20 in the thickness direction of the liquid crystal display panel 10 in the second direction, the tilting direction of the liquid crystals 24 located on opposite sides of the opening 19 in the first direction is the same as that of the liquid crystals 24 in the adjacent domain area. For example, the liquid crystal 24 located on one side of the opening 19 is aligned according to line (c), and the liquid crystal 24 located on the other side of the opening 19 is aligned according to line (d). Both of these liquid crystals 24 are aligned with the liquid crystals 24 in the adjacent domain area, so that the liquid crystals 24 near the opening 19 are properly aligned and no dark lines are generated. Therefore, by setting the opening 19 on the light-shielding part 181 to correspond to the position of the first main electrode 221 in the sub-pixel area 20, the liquid crystal 24 alignment problem caused by the opening 19 can be avoided, which is beneficial to improving the transmittance.

[0081] Understandably, the first main electrode 221 and the second main electrode 222 divide the sub-pixel region 20 into four domain regions. The pixel electrode 22a also includes multiple slits 223 located in each domain region, arranged at intervals and parallel to each other, forming a strip electrode between any two slits 223. The strip electrode is connected to the first main electrode 221 or the second main electrode 222. The multiple slits 223 located on opposite sides of the first main electrode 221 are arranged in a mirror symmetry, and the multiple slits 223 located on opposite sides of the second main electrode 222 are also arranged in a mirror symmetry. That is to say, the pixel electrode 22a in each sub-pixel region 20 has an approximately star-shaped electrode structure.

[0082] In another specific implementation, such as Figure 6As shown, pixel electrode 22a adopts an 8-domain design. Specifically, sub-pixel region 20 includes a main pixel region 20a and a secondary pixel region 20b arranged adjacent to each other in a first direction; pixel electrode 22a includes a first sub-pixel electrode 22aa located in the main pixel region 20a and a second sub-pixel electrode 22ab located in the secondary pixel region 20b. The first sub-pixel electrode 22aa includes a first main electrode 221 and a third main electrode 224, and the second sub-pixel electrode 22ab includes a first main electrode 221 and a fourth main electrode 225. The third main electrode 224 and the fourth main electrode 225 both extend along the first direction; the third main electrode 224 is on the same layer as the adjacent first main electrode 221 and is arranged intersecting with each other, and the fourth main electrode 225 is on the same layer as the adjacent first main electrode 221 and is arranged intersecting with each other. The light-shielding part 181 has only one opening 19. In the second direction, the projection of the opening 19 in the thickness direction of the liquid crystal display panel 10 is aligned with the projection of the first main electrode 221 in the corresponding main pixel area 20a or sub-pixel area 20b in the thickness direction of the liquid crystal display panel 10.

[0083] Understandably, the light-shielding part 181 has only one opening 19, which can be set to correspond to any one of the first main electrodes 221 in the adjacent pixel area.

[0084] In another specific embodiment, when the pixel electrode 22a adopts the aforementioned 8-domain design, the light-shielding portion 181 is provided with two openings 19. In the second direction, the projections of the two openings 19 in the thickness direction of the liquid crystal display panel 10 are respectively aligned with the projections of the first main electrode 221 in the corresponding main pixel area 20a and sub-pixel area 20b in the thickness direction of the liquid crystal display panel 10. That is, the projection of one opening 19 in the thickness direction of the liquid crystal display panel 10 is aligned with the projection of the first main electrode 221 in the corresponding main pixel area 20a in the thickness direction of the liquid crystal display panel 10, and the projection of the other opening 19 in the thickness direction of the liquid crystal display panel 10 is aligned with the projection of the first main electrode 221 in the corresponding sub-pixel area 20b in the thickness direction of the liquid crystal display panel 10.

[0085] Understandably, the first main electrode 221 and the third main electrode 224 in the main pixel region 20a divide the main pixel region 20a into four domain regions, and the first main electrode 221 and the fourth main electrode 225 in the secondary pixel region 20b divide the main pixel region 20a into four domain regions. That is to say, the main pixel region 20a and the secondary pixel region 20b constitute a two-region 8-domain architecture. The pixel electrode 22a also includes multiple slits 223 located in each domain region, arranged at intervals and parallel to each other, so that a strip electrode is formed between any two slits 223. The strip electrode is connected to the first main electrode 221, the third main electrode 224 or the fourth main electrode 225.

[0086] In some embodiments, the third main electrode 224 and the fourth main electrode 225 extend along the same straight line; in other embodiments, the third main electrode 224 and the fourth main electrode 225 may also extend along different straight lines.

[0087] In some embodiments, whether it is a 4-domain product or an 8-domain product, the opening 19 is symmetrically arranged about a first axis of symmetry extending along the second direction, and the first main electrode 221 in the sub-pixel region 20 corresponding to the opening 19 is symmetrically arranged about a second axis of symmetry extending along the second direction. In the thickness direction of the liquid crystal display panel 10, the straight line containing the first axis of symmetry coincides with the straight line containing the second axis of symmetry. That is, as Figure 5 and Figure 6 As shown, in the thickness direction of the liquid crystal display panel 10, the projections of the opening 19 and the adjacent first main electrode 221 are symmetrically arranged about the axis of symmetry L. This design helps to further improve the alignment consistency between the liquid crystal 24 around the opening 19 and the liquid crystal 24 in the domain region, thereby more effectively avoiding the dark pattern problem caused by alignment differences, and thus improving the transmittance.

[0088] In some embodiments, such as Figure 3 As shown, the electrode layer 22 also includes a shielding electrode 22b disposed in the same layer as the pixel electrode 22a. The shielding electrode 22b is located above the data line 16 and between the data line 16 and the first light-shielding strip 18a. It is used to shield the electric field generated by the electrical signal on the data line 16 to avoid negative impact on the deflection of the liquid crystal 24.

[0089] In some embodiments, such as Figure 3 As shown, the second substrate 12 also includes a common electrode layer 22 located on the side of the light-shielding layer 18 near the liquid crystal layer 13 and covering the entire surface.

[0090] Understandably, at the opening 19, the common electrode layer 22 covers the sidewall of the opening 19 and other film layers on the second substrate layer 17 or the surface of the second substrate layer 17 exposed by the opening 19. That is, the common electrode layer 22 forms a groove structure at the opening 19, and the groove structure allows the liquid crystal layers 13 in two adjacent sub-pixel regions 20 in the second direction to flow into each other.

[0091] In some embodiments, the light-shielding layer 18 has a BM structure, but is not limited thereto.

[0092] In some embodiments, the first substrate layer 14 and the second substrate layer 17 include glass substrates, but are not limited thereto.

[0093] In some embodiments, the driving circuit layer 15 further includes a plurality of thin-film transistors and other electronic components. Since the embodiments of this application do not involve improvements to the structure of the driving circuit layer 15, the embodiments of this application do not specifically describe the structure of the driving circuit layer 15.

[0094] In this embodiment, by providing a first light-shielding strip 18a above the data line 16, the problem of light leakage in the edge area of ​​the data line 16 under the L0 dark state can be solved, thereby improving the contrast of the liquid crystal display panel 10. Furthermore, by providing an opening 19 on the first light-shielding strip 18a, the fluidity of the liquid crystal layer 13 on both sides of the first light-shielding strip 18a can be improved, thereby solving the problem of uneven movement and display in the edge area of ​​the data line 16 under the L0 dark state, thus improving the problem of elliptical uneven display and enhancing the quality of the liquid crystal display panel 10. In addition, by precisely controlling the position of the opening 19, the projection of the opening 19 and the first main electrode 221 in the adjacent sub-pixel area 20 is aligned in a direction perpendicular to the liquid crystal display panel 10, solving the problem of poor alignment of the liquid crystal 24 caused by the opening 19, thereby improving the transmittance of the sub-pixel area 20. Therefore, this embodiment can improve both the quality and transmittance of the liquid crystal display panel 10 while improving its contrast.

[0095] This application also provides a liquid crystal display device, which includes the liquid crystal display panel described in the above embodiments.

[0096] Of course, liquid crystal display devices also include housings and other conventional structures for housing and protecting the liquid crystal display panel.

[0097] In the description 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 technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more features. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0098] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0099] The embodiments, implementation methods, and related technical features of this application can be combined and substituted for each other without conflict.

[0100] The above are merely preferred embodiments of this application and are not intended to limit this application in any way. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of this application without departing from the scope of the technical solution of this application shall still fall within the scope of the technical solution of this application.

Claims

1. A liquid crystal display panel, characterized in that, It includes a first substrate and a second substrate disposed opposite to each other, and a liquid crystal layer sandwiched between the first substrate and the second substrate; The first substrate includes a first substrate layer and a driving circuit layer located on the side of the first substrate layer near the liquid crystal layer. The driving circuit layer includes a plurality of data lines that extend along a first direction. The second substrate includes a second substrate layer and a light-shielding layer located on the side of the second substrate layer close to the liquid crystal layer. The light-shielding layer includes a plurality of first light-shielding strips arranged in a one-to-one correspondence with the plurality of data lines. The data lines and the corresponding first light-shielding strips are arranged overlapping each other in the thickness direction of the liquid crystal display panel. Each of the first light-shielding strips has at least one opening, through which the liquid crystal layers located on opposite sides of the first light-shielding strips can communicate with each other.

2. The liquid crystal display panel according to claim 1, characterized in that, The liquid crystal display panel has multiple sub-pixel areas arranged in multiple rows and columns; a data line and a first light-shielding strip are provided between any two adjacent columns of the sub-pixel areas; each sub-pixel area has at least one opening on the side near the data line; The first substrate further includes an electrode layer located on the side of the driving circuit layer near the liquid crystal layer; the electrode layer includes a pixel electrode located in the sub-pixel region, and the pixel electrode includes at least one first main electrode extending along a second direction, the second direction being perpendicular to the first direction; The number of openings located on the side of the sub-pixel region near the data line is less than or equal to the number of the first main electrodes in the sub-pixel region; in the second direction, the projection of any one of the openings in the thickness direction of the liquid crystal display panel is aligned with the projection of a corresponding first main electrode in the sub-pixel region in the thickness direction of the liquid crystal display panel.

3. The liquid crystal display panel according to claim 2, characterized in that, Each pixel electrode includes a first main electrode and a second main electrode, the second main electrode extending along the first direction; the second main electrode is in the same layer as the adjacent first main electrode and is arranged to cross each other; The sub-pixel area has only one opening on the side near the data line. In the second direction, the projection of the opening in the thickness direction of the liquid crystal display panel is aligned with the projection of the first main electrode in the corresponding sub-pixel area in the thickness direction of the liquid crystal display panel.

4. The liquid crystal display panel according to claim 2, characterized in that, The sub-pixel region includes a main pixel region and a secondary pixel region disposed adjacently in the first direction; the pixel electrode includes a first sub-pixel electrode located in the main pixel region and a second sub-pixel electrode located in the secondary pixel region; The first sub-pixel electrode includes a first main electrode and a third main electrode, and the second sub-pixel electrode includes a first main electrode and a fourth main electrode. The third main electrode and the fourth main electrode both extend along the first direction. The third main electrode is on the same layer as the adjacent first main electrode and is arranged to cross each other, and the fourth main electrode is on the same layer as the adjacent first main electrode and is arranged to cross each other. The sub-pixel area has only one opening on the side near the data line. In the second direction, the projection of the opening in the thickness direction of the liquid crystal display panel is aligned with the projection of the first main electrode in the corresponding main pixel area or sub-pixel area in the thickness direction of the liquid crystal display panel.

5. The liquid crystal display panel according to claim 2, characterized in that, The sub-pixel region includes a main pixel region and a secondary pixel region disposed adjacently in the first direction; the pixel electrode includes a first sub-pixel electrode located in the main pixel region and a second sub-pixel electrode located in the secondary pixel region; The first sub-pixel electrode includes a first main electrode and a third main electrode, and the second sub-pixel electrode includes a first main electrode and a fourth main electrode. The third main electrode and the fourth main electrode both extend along the first direction. The third main electrode is on the same layer as the adjacent first main electrode and is arranged to cross each other, and the fourth main electrode is on the same layer as the adjacent first main electrode and is arranged to cross each other. The sub-pixel area has two openings on the side near the data line. In the second direction, the projections of the two openings in the thickness direction of the liquid crystal display panel are respectively aligned with the projections of the first main electrode in the corresponding main pixel area and the sub-pixel area in the thickness direction of the liquid crystal display panel.

6. The liquid crystal display panel according to any one of claims 2 to 5, characterized in that, The opening is symmetrically arranged about a first axis of symmetry extending along the second direction, and the first main electrode in the sub-pixel region corresponding to the opening is symmetrically arranged about a second axis of symmetry extending along the second direction. In the thickness direction of the liquid crystal display panel, the first axis of symmetry and the second axis of symmetry are arranged to coincide.

7. The liquid crystal display panel according to claim 2, characterized in that, In the first direction, the ratio between the length of the opening and the length of the corresponding sub-pixel region is greater than 0.

05.

8. The liquid crystal display panel according to claim 1, characterized in that, In the thickness direction of the liquid crystal display panel, the depth of the opening is greater than 0 and less than or equal to the thickness of the first light-shielding strip.

9. The liquid crystal display panel according to any one of claims 2 to 5, characterized in that, The driving circuit layer also includes a plurality of scan lines located on the side of the first substrate layer near the liquid crystal layer, the scan lines extending along the second direction; each row of the sub-pixel area corresponds to at least one scan line. The light-shielding layer also includes a plurality of second light-shielding strips, which are aligned one-to-one with the plurality of scan lines; the scan lines and the corresponding second light-shielding strips are overlapped in the thickness direction of the liquid crystal display panel; the first light-shielding strips and the second light-shielding strips are in the same layer and are arranged to cross each other.

10. A liquid crystal display device, characterized in that, Includes the liquid crystal display panel according to any one of claims 1-9.

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