A large-size display panel based on a stepped black matrix and a display

Abstract

A large-size display panel based on a stepped black matrix, comprising an array plate, a liquid crystal layer and a substrate, the liquid crystal layer being located between the array plate and the substrate, a frame glue being provided at the periphery of the substrate, the substrate comprising a black matrix, a transparent substrate, a color resistance layer and a first light-adjusting color resistance block, the black matrix and the color resistance layer being arranged on the transparent substrate, the thickness of the black matrix being arranged in a stepped manner, a plurality of spaced-apart opening regions being provided on the black matrix, the color resistance layer being located in the opening regions, the color resistance layer comprising a plurality of color resistance blocks, and the color resistance blocks corresponding to the opening regions one by one, the first light-adjusting color resistance block being arranged on at least one color resistance block or in at least one color resistance block. The present application compensates for the difference in deformation amount of the large-size display panel, thereby improving the problem of various display defects caused by the uneven deformation amount of the edge and the center position of the large-size display panel.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of display, in particular to a large-size display panel based on stepped black matrix and display. BACKGROUND

[0002] With the completion and mass production of high-generation lines of LCD (Liquid Crystal Display) at home and abroad, large-size LCDs such as 65-inch / 75-inch / 85-inch have become the mainstream choice in the market. For large-size display panels, the deformation of the edge position is relatively stable due to the constraint of the frame glue, but the deformation of the center position is relatively unstable due to the weak constraint force far from the frame glue. Therefore, the overall deformation stability of the large-size display panel is poor, the stress is uneven, the process fluctuation is more sensitive, and various display defects are more likely to occur in the produced display panel, and the Mura (a phenomenon that the display brightness is uneven, causing various traces) is more unstable.

[0003] In the design of traditional small and medium-sized LCD panels, a full-screen isometric black matrix is generally designed to support. This design can support and resist uneven deformation in the small-size display panel field, but for large-size display panels, the deformation of the center position is greater than that of the edge position due to uneven stress, and the isometric black matrix is not enough to resist, so a stepped black matrix design is needed. SUMMARY

[0004] In order to solve the defects of the prior art, the purpose of the present application is to provide a large-size display panel based on stepped black matrix and display, which improves the problem of various display defects caused by uneven deformation of the edge and center positions of the large-size display panel.

[0005] In order to achieve the above purpose, the large-size display panel based on stepped black matrix provided by the present application comprises: an array plate, a liquid crystal layer and a substrate, the liquid crystal layer is located between the array plate and the substrate, and a frame glue is provided around the edges of the substrate,

[0006] The substrate comprises a black matrix, a transparent substrate, a color resistance layer and a first light adjusting color resistance block, the black matrix and the color resistance layer are arranged on the transparent substrate,

[0007] The thickness of the black matrix is arranged in a stepped manner,

[0008] A plurality of spaced opening regions are provided on the black matrix, the color resistance layer is located in the opening region, the color resistance layer comprises a plurality of color resistance blocks, and the color resistance blocks correspond one-to-one to the opening regions,

[0009] The first dimming color resist block is disposed on at least one of the color resist blocks or within at least one color resist block.

[0010] Furthermore, the color resist layer includes: a red color resist block, a green color resist block, and a blue color resist block. When the first dimming color resist block is disposed on the red color resist block or the blue color resist block, the substrate further includes a second dimming color resist block.

[0011] The second dimming color block is disposed on the green color block.

[0012] Furthermore, the first dimming color block and / or the second dimming color block each include: at least one sub-dimming color block.

[0013] Furthermore, the projections of the sub-dimming color resist blocks on the liquid crystal layer are all located in a liquid crystal domain region, and the liquid crystal domain region is a region where the liquid crystal state varies.

[0014] Furthermore, the projection of the liquid crystal domain region on the color resist block is located in the area connecting the peripheral edge regions of the color resist block and the midpoints of the long sides of the color resist block.

[0015] Furthermore, the sub-dimming color resist block is arranged in contact with the black matrix.

[0016] Furthermore, when there is a color-resistance non-uniform area in the color-resistance block, each of the sub-dimming color-resistance blocks is arranged in the color-resistance non-uniform area.

[0017] Furthermore, the substrate further includes a protective layer;

[0018] The protection layer is arranged on the upper surface of the transparent substrate including the black matrix, the color resist layer and the first dimming color resist block.

[0019] Furthermore, the thickness of the black matrix decreases as it approaches the edge of the substrate, and increases as it approaches the center of the substrate.

[0020] To achieve the above object, the present invention further provides a liquid crystal display comprising the display panel and a backlight module as described above. The backlight module is disposed on the back of the display panel and is used to provide a backlight source to the display panel.

[0021] The large-size display panel based on the stepped black matrix provided by the present invention has the following advantages compared with the prior art:

[0022] Beneficial effects:

[0023] The black matrix with stepped thickness is adopted to compensate the deformation difference of the large-size display panel, and the display defects caused by the uneven deformation of the large-size display panel at the edge and the center are improved.

[0024] Other features and advantages of the present application will be set forth in the following description, and in part will become apparent to those skilled in the art from the description, or can be learned by practice of the application. BRIEF DESCRIPTION OF DRAWINGS

[0025] The accompanying drawings are included to provide a further understanding of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the principles of the application. In the drawings:

[0026] Figure 1 Fig. 1 is a structural schematic diagram of a large-size display panel according to an embodiment of the present application;

[0027] Figure 2 Fig. 3 is a third structural schematic diagram of a substrate according to the embodiment of the present application;

[0028] Figure 3 Fig. 4 is a fourth structural schematic diagram of a substrate according to the embodiment of the present application;

[0029] Figure 4 Fig. 5 is a schematic diagram of a stepped black matrix according to the embodiment of the present application;

[0030] Figure 5 Fig. 6 is a first structural schematic diagram of a substrate according to another embodiment of the present application;

[0031] Figure 6 Fig. 7 is a second structural schematic diagram of a substrate according to the embodiment of the present application;

[0032] Figure 7 Fig. 8 is a structural schematic diagram of a liquid crystal display according to a third embodiment of the present application. DETAILED DESCRIPTION

[0033] The preferred embodiments of the present application will be described herein below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are merely intended to illustrate and explain the present application, and should not be construed as limiting the scope of the present application. The preferred embodiments of the present application are merely intended to illustrate and explain the present application, and should not be construed as limiting the scope of the present application.

[0034] Embodiments of the present application will be described below in greater detail with reference to the accompanying drawings. Although certain embodiments of the present application are shown in the drawings, it should be understood that the present application can be implemented in various forms, and should not be construed as being limited to the embodiments set forth herein. Rather, these embodiments are provided to more thoroughly and completely understand the present application. It should be understood that the drawings and embodiments of the present application are merely intended to serve an exemplary purpose, and should not be construed as limiting the scope of the present application.

[0035] As used herein, the term "includes" and its variants are to be read to be analogous to "comprises," "comprising," "has," "having," "includes" or "including" and are open- ended, i.e., "includes but is not limited to." The term "based on" is to be read as "based, at least in part, on." The term "one embodiment" means "at least one embodiment"; the term "another embodiment" means "at least one additional embodiment"; the term "some embodiments" means "at least some embodiments." Related definitions will be given in the description below.

[0036] It should be noted that the terms "first", "second", and the like in the description and in the claims, are used only to distinguish different devices, components, or elements, and do not necessarily mean that the devices, components, or elements so designated are to be construed as having primary or secondary relations with respect to each other or with respect to the other devices, components, or elements. The terms "one", "multiple", and the like in the description and in the claims are illustrative and not restrictive, and those skilled in the art should understand that "one" or "multiple" should be understood as "one or more" unless the context clearly indicates otherwise. "Multiple" should be understood as two or more.

[0037] In addition, all directional indications, such as upper, lower, left, right, front, rear, etc., in the embodiments of the present application are only used to explain the relative positional relationship, movement condition, etc. between components in a certain posture (as shown in the drawings), and if the certain posture changes, the directional indications will also change accordingly.

[0038] In the following, embodiments of the present application will be described in detail with reference to the accompanying drawings.

[0039] Embodiment 1

[0040] Figure 1 For the structural schematic diagram of the large-size display panel according to Embodiment One of the present application, Figures 2-3 respectively, the structural schematic diagram of the substrate according to Embodiment One of the present application, and the following will be described with reference to Figures 1-3 Embodiment One of the present application will be described in detail.

[0041] As Figure 1 shown, Embodiment One of the present application provides a large-size display panel based on a stepped black matrix, which comprises a substrate 10, a liquid crystal layer 20 and an array plate 30, the substrate 10 and the array plate 30 are oppositely arranged, and the liquid crystal layer 20 is clamped between the substrate 10 and the array plate 30.

[0042] As Figure 2 shown, the substrate 10 in Embodiment One of the present application comprises a transparent base 40, a black matrix 50 and a color resistance layer, the black matrix 50 and the color resistance layer are arranged on the transparent base 40, and the thickness of the black matrix 50 is arranged in a stepped manner. That is, a black matrix with different thicknesses is used when designing a large-size display panel.

[0043] Further, the black matrix with thinner thickness is used at the position close to the frame glue of the substrate edge, and the thickness of the black matrix gradually increases as it is closer to the center position of the substrate, so as to better compensate for the larger deformation at the center position. Because in the design of large-size display panel, as shown in Figure 4 the edge of the panel has better constraint effect on the deformation at the edge of the panel due to the existence of the frame glue 80, and the thickness of the black matrix 50 at the edge of the panel can be designed to be thinner; as it is closer to the center position, the panel gradually moves away from the constraint of the frame glue, and the deformation will gradually increase, if the black matrix with the same thickness as the edge is still used, the residual deformation will be caused at the panel, leading to unstable display and then inducing display failure, therefore, the black matrix with larger thickness value needs to be designed at this position to resist the residual deformation; by analogy, the closer to the center position of the panel, the larger the thickness value of the black matrix, that is, the black matrix presents a stepped thickness.

[0044] Compared with the use of equal height (equal thickness) black matrix to support in the design of traditional small and medium-sized display panels, the use of stepped black matrix in the design of large-size display panels can better resist the excessive deformation at the center position, ensure that the whole panel deformation remains stable during use, and achieve stable display effect and less display failure.

[0045] In the embodiment of the present application, the black matrix is manufactured by exposure, and multiple mask masks can be used to produce the stepped black matrix. As shown in Figure 4 the same thickness of the black matrix is produced by the same mask, and the stepped black matrix can be produced by multiple masks.

[0046] It should be noted that the stepped black matrix is not limited to the edge being thin and the center being thick, and the black matrix with different thicknesses at different positions can be designed according to the actual situation of the panel.

[0047] Referring to 2 to Figure 3 , the black matrix 50 is provided with a plurality of spaced opening regions, the color resistance layer includes a plurality of color resistance blocks 60, and the color resistance blocks 60 correspond to the opening regions one by one.

[0048] The substrate 10 further includes a first light-adjusting color resistance block 70, which is arranged on or in at least one color resistance block 60, and the color of the first light-adjusting color resistance block 70 is different from that of the color resistance block 60. Figure 2 The first light-adjusting color resistance block 70 is arranged in a color resistance block 60.

[0049] In the embodiment of the present application, the substrate can be a color film substrate provided with a color filter layer. The transparent substrate 40 can use a glass material substrate to avoid affecting the light transmittance of the substrate. The black matrix 50 is a light shielding layer that plays a light shielding role, but because there are opening regions in the black matrix partition, it is easy to cause light leakage. The material of the black matrix 50 is a high-conductivity black light shielding material, which can specifically select a black metal (such as iron, chromium, etc.), or a black resin with high conductivity, or a common black resin doped with silver nanowires and carbon nanotubes, etc. The layer on which all the color resist blocks are located is called a color resist layer, and the color resist layer can be used to block different color light, and the color resist layer specifically includes a red color resist block, a green color resist block and a blue color resist block, wherein the red color resist block, the green color resist block and the blue color resist block are sequentially and spacedly arranged in the corresponding opening region.

[0050] In the embodiment of the present application, the first light-adjusting color resist block 70 is a color resist layer for adjusting the light transmittance of the color resist layer. The color of the first light-adjusting color resist block 70 is not the same as the color of the color resist block 60 to be set, otherwise the effect of reducing the light transmittance of the color resist block 60 cannot be achieved. For example, when it is required to reduce the light transmittance of the red color resist block, the color of the first light-adjusting color resist block 70 can be selected as reverse color blue, intermediate color green or white.

[0051] In addition, in order to avoid causing too large changes to the overall color resist of the color resist block 60, when the color of the first light-adjusting color resist block 70 is a reverse color or an intermediate color, the size of the first light-adjusting color resist block 70 cannot be greater than half the size of the color resist block 60. For example, when it is required to reduce the light transmittance of the red color resist block, the first light-adjusting color resist block 70 is blue or green, and when the size of the first light-adjusting color resist block 70 is greater than half the size of the red color resist block, the red color resist block will become a blue color resist block or a green color resist block.

[0052] In the embodiment of the present application, considering that the first light-adjusting color resist block 70 is arranged on the color resist block 30 and will cause certain influence on the overall thickness of the display panel. Therefore, with reference to Figure 2 In the embodiment of the present application, the first light-adjusting color resist block 70 can be arranged in the corresponding color resist block 60 according to the specific color deviation of the display panel. For example, part of the structure on the color resist block 60 is removed to form a groove, and then the groove is filled with the first light-adjusting color resist block 70, so that the display chroma is adjusted without changing the substrate.

[0053] In the color adjustment of the display panel, the position of the first light-adjusting color resist block 70 can be determined according to the color cast of the display panel. For example, when the color cast of the display panel currently displayed is yellow, the first light-adjusting color resist block 70 can be arranged on the red color resist block, so as to reduce the light transmittance of the entire red color resist block, and make the display effect of the display panel deviate to the blue direction. Of course, when the color cast of the display panel currently displayed is blue, the first light-adjusting color resist block 70 can be arranged on the blue color resist block, so as to reduce the light transmittance of the entire blue color resist block.

[0054] The large-size display panel provided in the first embodiment includes a substrate including a transparent substrate and a black matrix arranged on the transparent substrate, and the thickness of the black matrix increases as it is closer to the center of the substrate, so that the black matrix presents a stepped shape, thereby improving various display problems caused by the uneven deformation of the edge and the center of the large-size display panel, such as display unevenness, display instability, Mura change and the like.

[0055] Embodiment 2

[0056] The display panel based on the stepped black matrix provided in the second embodiment of the present application is different from the first embodiment in that the substrate 10 further includes a second light-adjusting color resist block 90 and a protective layer 110.

[0057] Figure 5 As shown in the first structural schematic diagram of the substrate according to the second embodiment of the present application, in the second embodiment of the present application, the color resist layer includes a red color resist block, a green color resist block and a blue color resist block, and the substrate 10 further includes a second light-adjusting color resist block 90. Figure 5

[0058] When the first light-adjusting color resist block 70 is arranged on the red color resist block or the blue color resist block, the second light-adjusting color resist block 90 is arranged on the green color resist block.

[0059] It should be understood that after the first light-adjusting color resist block 70 is arranged, the display panel can still have a certain degree of color cast, for example, the color cast of the display panel is relatively serious or the size requirement of the first light-adjusting color resist block 70 is relatively large, at this time, the second light-adjusting color resist block 90 can be arranged on the green color resist block, so as to further adjust the color cast of the display panel. When the second light-adjusting color resist block 90 is arranged on the green color resist block, the size of the second light-adjusting color resist block can be determined according to the specific light-adjusting requirement, and the color of the second light-adjusting color resist block 90 can be the same as that of the first light-adjusting color resist block 70. For example, when the color of the first light-adjusting color resist block 70 arranged on the red color resist block is blue, the color of the second light-adjusting color resist block 90 can also be blue. Of course, when the color of the first light-adjusting color resist block 70 is red, the color of the second light-adjusting color resist block 90 can also be red.

[0060] ​In the embodiment two, the display color of the display panel is adjusted by setting the first light-adjusting color resist block 70 and the second light-adjusting color resist block 90 when the sizes of the color resist blocks 60 are inconsistent. The specific adjustment process can be adjusted by referring to the way of adjusting the display color of the display panel when the sizes of the color resist blocks 60 are consistent, which will not be described here.

[0061] Further, in the embodiment two, the first light-adjusting color resist block 70 and / or the second light-adjusting color resist block 90 each comprises at least one sub light-adjusting color resist block, which has the same color as the color of the light-adjusting color resist block in which the sub light-adjusting color resist block is located. It can be understood that the first light-adjusting color resist block 70 or the second light-adjusting color resist block 90 is set as a plurality of sub structures with the same color. For example, the first light-adjusting color resist block 70 comprises two sub light-adjusting color resist blocks, and the second light-adjusting color resist block 90 comprises three sub light-adjusting color resist blocks. However, the specific number of the sub light-adjusting color resist blocks is not limited in the embodiment two, and can be set according to actual needs.

[0062] In addition, during the color display process of the display panel, there may be a region of liquid crystal disorder on the liquid crystal layer, which causes the display panel to have a black state light leakage phenomenon when displaying a picture, reduces the black state brightness of the module, and further improves the contrast. The region in which the liquid crystal state changes, i.e., the region in which the liquid crystal disorder occurs, is a liquid crystal domain region. In the liquid crystal domain region, the liquid crystal disorder causes the color resist block 60 to have a region with a corner. In the liquid crystal domain region, the liquid crystal disorder causes the display panel to have a black state light leakage.

[0063] Considering that the color resist light-adjusting block in the present scheme will shield part of the region on the color resist block 60, thereby realizing the light-adjusting process, therefore, when the color resist light-adjusting block is set, the sub color resist light-adjusting block can be set in the projection region of the liquid crystal domain region on the color resist block 60, i.e., the projections of each sub light-adjusting color resist block on the liquid crystal layer are in the liquid crystal domain region, thereby realizing the effect of reducing the black state light leakage. When each sub light-adjusting color resist block is set, the sub light-adjusting color resist block can be preferentially set in the projection region of the liquid crystal domain region on the color layer, which can not only adjust the display chroma of the display panel, but also shield the liquid crystal domain region to avoid the black state light leakage of the display panel, thereby achieving the dual functions of improving the contrast and adjusting the chroma.

[0064] In the embodiment of the present application, the projection of the liquid crystal domain state region on the color resistance block 60 is at the four peripheral edge regions of the color resistance block 60 and the midpoint connecting region of the long side of the color resistance block 60. In the case of a large number of sub-light-adjusting color resistance blocks, all the liquid crystal domain state regions can be provided with sub-light-adjusting color resistance blocks in the projection region of the color resistance block 60, so as to further reduce the liquid crystal domain state region and further reduce the black state light leakage phenomenon. The projection region of all the liquid crystal domain state regions in the red color resistance block is blocked by the sub-light-adjusting color resistance block, and at this time, the black state light leakage phenomenon corresponding to the R color resistance is very low. The projection region of all the liquid crystal domain state regions in the red color resistance block and the green color resistance block is blocked by the sub-light-adjusting color resistance block, and for the same reason, the black state light leakage phenomenon corresponding to the red color resistance block and the green color resistance block is very low.

[0065] Considering that most of the projections of the liquid crystal domain state regions are at the four periphery of the color resistance block, when the sub-light-adjusting color resistance block is set, the sub-light-adjusting color resistance block can be preferentially set from the four peripheral edge regions of the color resistance block 60, that is, the sub-light-adjusting color resistance block is in contact with the black matrix 50. In the case that the sub-light-adjusting color resistance block is in contact with the black matrix, the effect of reducing the black state light leakage is most obvious, and therefore, in the case of considering reducing the black state light leakage to the lowest, the sub-light-adjusting color resistance block can be in contact with the black matrix 50.

[0066] It can be understood that in the normal display process of the display panel, there can be a situation that part of the region is not uniform in display, and the position corresponding to the position on the color resistance block 60 can be marked, and then the sub-light-adjusting color resistance block is set at the position corresponding to the position of the color resistance block 60 where the display is not uniform. For example, in the case that the display effect of the display panel is not uniform due to the color resistance non-uniform region of the color resistance block 60, each sub-light-adjusting color resistance block can be set in the color resistance non-uniform region. Of course, if the display is not uniform due to part of the structure on the array panel or the liquid crystal layer, the sub-light-adjusting color resistance block is set at the corresponding position of the color resistance block 60 on the liquid crystal layer or the array panel.

[0067] Figure 6 As shown in the second structural schematic diagram of the substrate according to the embodiment two of the present application, Figure 6 As shown in the second structural schematic diagram of the substrate according to the embodiment two of the present application,

[0068] It should be understood that the protective layer 110 is used to protect the black matrix 50, the color resistance layer, the first light-adjusting color resistance block 70 and the second light-adjusting color resistance block 90 on the transparent substrate 40 from being affected by the external environment, so as to avoid affecting the performance of the substrate. The material of the protective layer 110 is a light-sensitive material.

[0069] Embodiment 3

[0070] In the third embodiment of the present application, a liquid crystal display is also provided, Figure 7 A schematic diagram of the structure of the liquid crystal display according to the third embodiment of the present application is shown in Figure 7 As shown, the liquid crystal display (LCD) comprises the display panel 100 and the backlight module 130 as described above, the backlight module 130 is arranged on the back of the display panel 100, and the backlight module 130 is used to provide a backlight source for the display panel 100.

[0071] Those skilled in the art can understand that the above only describes the preferred embodiments of the present application, and is not intended to limit the present application. Although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacements to some technical features. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A large-size display panel based on a stepped black matrix, comprising: An array plate, a liquid crystal layer and a substrate. The liquid crystal layer is located between the array plate and the substrate. Frame glue is provided around the edges of the substrate. The substrate includes a black matrix, a transparent substrate, a color resist layer and a first dimming color resist block, wherein the black matrix and the color resist layer are arranged on the transparent substrate. The thickness of the black matrix is ​​set in a stepped manner. The black matrix is ​​provided with a plurality of spaced-apart opening areas, the color resist layer is located in the opening areas, the color resist layer includes a plurality of color resist blocks, and the color resist blocks correspond to the opening areas one by one. The first dimming color block is arranged on at least one of the color block or in at least one color block; The black matrix includes a plurality of stepped regions, and the thickness of the plurality of stepped regions is arranged to increase in a step-by-step manner from the edge to the center of the substrate; The step-by-step thickness change is used to compensate for the difference in deformation between the edge and center of the large-size display panel.

2. The large-size display panel based on a stepped black matrix according to claim 1, characterized in that: The color resist layer includes: a red color resist block, a green color resist block, and a blue color resist block. When the first dimming color resist block is disposed on the red color resist block or the blue color resist block, the substrate further includes a second dimming color resist block. The second dimming color block is disposed on the green color block.

3. The large-scale display panel based on the stepped black matrix according to claim 2, characterized in that: The first dimming color block and / or the second dimming color block each include: at least one sub-dimming color block.

4. The large-scale display panel based on the stepped black matrix according to claim 3, characterized in that: The projections of the sub-dimming color resist blocks on the liquid crystal layer are all within the liquid crystal domain region, and the liquid crystal domain region is a region where the liquid crystal state changes.

5. The large-scale display panel based on the stepped black matrix according to claim 4, characterized in that: The projection of the liquid crystal domain region on the color resist block is located in the peripheral edge region of the color resist block and the connecting region of the midpoints of the long sides of the color resist block.

6. The large-scale display panel based on the stepped black matrix according to claim 5, characterized in that: The sub-dimming color resist block is arranged in contact with the black matrix.

7. The large-scale display panel based on the stepped black matrix according to claim 3, characterized in that: When there is a color-resistance non-uniform area in the color-resistance block, each of the sub-dimming color-resistance blocks is arranged in the color-resistance non-uniform area.

8. The large-size display panel based on a stepped black matrix according to any one of claims 1 to 7, characterized in that: The substrate further includes a protective layer; The protection layer is arranged on the upper surface of the transparent substrate including the black matrix, the color resist layer and the first dimming color resist block.

9. The large-scale display panel based on a stepped black matrix according to claim 1, wherein: The thickness of the black matrix decreases as it approaches the edge of the substrate, and increases as it approaches the center of the substrate.

10. A liquid crystal display, characterized in that: The liquid crystal display comprises the display panel and the backlight module according to any one of claims 1 to 9, wherein the backlight module is arranged on the back side of the display panel and is used to provide a backlight source for the display panel.

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