Display panel

Abstract

The present application discloses a display panel. The display panel includes a display area and a non-display area located outside the display area. The display panel includes: a first substrate; a second substrate disposed opposite to the first substrate; a liquid crystal layer located between the first substrate and the second substrate and corresponding to the display area; a first conductive layer located between the first substrate and the liquid crystal layer, the first conductive layer including a first tip structure located in the non-display area, and the cross-sectional area of the first tip structure gradually decreasing in a direction towards the liquid crystal layer; and a first alignment layer located between the first conductive layer and the liquid crystal layer and covering the first tip structure. The present application can increase the time of display without afterimage and improve the display effect.

Description

Technical Field

[0001] This application relates to the field of display technologies, and particularly to a display panel. Background Art

[0002] With the improvement of the quality of liquid crystal display screens, the display screen is required to have no image retention during long-term display. The image retention is mainly caused by the influence of the secondary electric field formed by the ionic charges in the liquid crystal layer on the display. In the existing display screens, the ionic charges in the liquid crystal layer dissipate slowly after aggregation, resulting in a short time for the display to have no image retention and reducing the display effect. Summary of the Invention

[0003] An embodiment of this application provides a display panel, which can increase the time for the display to have no image retention and improve the display effect.

[0004] An embodiment of this application provides a display panel, including a display area and a non-display area located outside the display area. The display panel includes:

[0005] A first substrate;

[0006] A second substrate, disposed opposite to the first substrate;

[0007] A liquid crystal layer, located between the first substrate and the second substrate and corresponding to the display area;

[0008] A first conductive layer, located between the first substrate and the liquid crystal layer. The first conductive layer includes a first tip structure located in the non-display area, and the cross-sectional area of the first tip structure gradually decreases in the direction towards the liquid crystal layer;

[0009] A first alignment layer, located between the first conductive layer and the liquid crystal layer and covering the first tip structure.

[0010] Optionally, the first tip structure is disposed around the display area.

[0011] Optionally, the first tip structure includes a plurality of sub-tip structures;

[0012] The cross-sectional area of the sub-tip structure gradually decreases in the direction towards the liquid crystal layer.

[0013] Optionally, the plurality of sub-tip structures are spaced apart, and the first alignment layer covers the plurality of sub-tip structures and the first substrate between the plurality of sub-tip structures.

[0014] Optionally, the plurality of sub-tip structures are arranged in multiple rows, and any two adjacent rows of sub-tip structures are staggered.

[0015] Optionally, the sub-tip structure is in a conical shape.

[0016] Optionally, the display panel further includes:

[0017] A second alignment layer, located between the second substrate and the liquid crystal layer, and the second alignment layer completely covers the display area.

[0018] Optionally, the display panel further includes:

[0019] A second conductive layer, located between the second alignment layer and the second substrate.

[0020] Optionally, the second conductive layer includes a second tip structure located in the non-display area, and the cross-sectional area of the second tip structure gradually decreases in the direction towards the liquid crystal layer;

[0021] The second alignment layer also covers the second tip structure of the second conductive layer.

[0022] Optionally, the display panel further includes:

[0023] Sealant, located between the first alignment layer and the second substrate, and the sealant corresponds to the position of the first tip structure.

[0024] The beneficial effects of the present application are as follows: By providing the first conductive layer and the first alignment layer, the first conductive layer includes a first tip structure located in the non-display area, and the first alignment layer covers the first tip structure. After the ionic charges in the liquid crystal layer accumulate, they diffuse to the non-display area through the first alignment layer and then quickly discharge through the first tip structure, improving the ion dissipation speed, thereby increasing the time for the display panel to display without afterimages and improving the display effect. Description of the Drawings

[0025] The following will combine the drawings and describe the specific embodiments of the present application in detail, making the technical solutions and other beneficial effects of the present application obvious.

[0026] Figure 1 It is a schematic structural diagram of a display panel provided by an embodiment of the present application;

[0027] Figure 2 It is another schematic structural diagram of a display panel provided by an embodiment of the present application;

[0028] Figure 3 It is a top view of a first tip structure in a display panel provided by an embodiment of the present application;

[0029] Figure 4 It is another schematic structural diagram of a display panel provided by an embodiment of the present application;

[0030] Figure 5Schematic diagram of discharge of the first tip structure in the display panel provided by the embodiments of the present application. Detailed implementation manners

[0031] The specific structures and functional details disclosed herein are merely representative and are for the purpose of describing exemplary embodiments of the present application. However, the present application can be implemented in many alternative forms and should not be construed as being limited only to the embodiments set forth herein.

[0032] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "center", "lateral", "upper", "lower", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present application. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present application, unless otherwise specified, the meaning of "a plurality" is two or more. Additionally, the term "comprising" and any variations thereof are intended to cover non-exclusive inclusion.

[0033] In the description of the present application, it should be noted that, unless otherwise clearly defined and limited, the terms "mounted", "connected" and "coupled" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication between two elements inside. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific situations.

[0034] The terms used herein are only for the purpose of describing specific embodiments and are not intended to limit the exemplary embodiments. Unless the context clearly indicates otherwise, the singular forms "a", "an" used herein are also intended to include the plural. It should also be understood that the terms "comprising" and / or "including" specify the presence of the stated features, integers, steps, operations, units and / or components, and do not preclude the presence or addition of one or more other features, integers, steps, operations, units, components and / or their combinations.

[0035] The present application will be further described below with reference to the drawings and embodiments.

[0036] See Figure 1, which is a schematic structural diagram of a display panel provided by an embodiment of the present invention. Among them, the display panel can be an LCD (Liquid Crystal Display).

[0037] As Figure 1 shown, the display panel provided by the embodiment of the present invention includes a display area AA and a non-display area NA located outside the display area AA. For example, the non-display area NA can be disposed around the peripheral side of the display area AA. The display panel includes a first substrate 1, a second substrate 2, and a liquid crystal layer 3. The first substrate 1 is located in the display area AA and the non-display area NA, the second substrate 2 is located in the display area AA and the non-display area NA, and the first substrate 1 and the second substrate 2 are disposed opposite to each other. The liquid crystal layer 3 is encapsulated between the first substrate 1 and the second substrate 2, and the liquid crystal layer 3 is located in the display area AA. Among them, the first substrate 1 can be an array substrate, and the second substrate 2 can be a color filter substrate.

[0038] The display panel further includes a first conductive layer 4, and the first conductive layer 4 is located between the first substrate 1 and the liquid crystal layer 3. The first conductive layer 4 is located in the display area AA and the non-display area NA. Specifically, the first conductive layer 4 includes an electrode (not shown in the figure) located in the display area AA. The first substrate 1 can include a thin film transistor (not shown in the figure), and the electrode in the first conductive layer 4 is electrically connected to the thin film transistor in the first substrate 1. The first conductive layer 4 further includes a first tip structure 41 located in the non-display area NA, and the cross-sectional area of the first tip structure 41 gradually decreases in the direction toward the liquid crystal layer 3. Among them, the cross-sectional area of the first tip structure 41 refers to the cross-sectional area of the first tip structure 41 in a direction parallel to the liquid crystal layer 3.

[0039] The display panel further includes a first alignment layer 6, and the first alignment layer 6 is located between the first conductive layer 4 and the liquid crystal layer 3. The first alignment layer 6 covers the display area AA and covers the first tip structure 41 in the first conductive layer 4. After the ionic charges in the liquid crystal layer 3 accumulate, the ionic charges diffuse to the non-display area NA through the first alignment layer 6 and then quickly discharge through the first tip structure 41. Through the discharge of the first tip structure 41, the ion dissipation speed is effectively improved, and the time for the display panel to display without afterimage is increased (for example, it can meet the requirement of 360 hours or longer for display without afterimage), thereby improving the display effect. In addition, the surface of the first tip structure 41 in contact with the first alignment layer 6 is uneven, which increases the contact area between the first tip structure 41 and the first alignment layer 6 and reduces the peeling risk of the first alignment layer 6.

[0040] The first alignment layer 6 can achieve full coverage, that is, the first alignment layer 6 is coated entirely on the first conductive layer 4. Since the first alignment layer 6 is formed on the first conductive layer 4 by coating, the edge thickness and the center thickness of the first alignment layer 6 will be inconsistent. Therefore, in this embodiment, the first alignment layer 6 covers the display area AA and the non-display area NA, so that the edge of the first alignment layer 6 is located in the non-display area NA rather than in the display area AA, to ensure that the thickness of the first alignment layer 6 in the display area AA is consistent and avoid the problem of display unevenness (mura), thereby improving the display uniformity.

[0041] The non-display area NA can be located around the display area AA, so that the first tip structure 41 can be arranged around the display area AA. After the ionic charges are accumulated in the liquid crystal layer 3, the accumulated ionic charges can be quickly discharged from the periphery of the liquid crystal layer 3 through the first tip structure 41, further improving the dissipation speed of the ionic charges.

[0042] In one embodiment, the first tip structure 41 can be only one structure. For example, the first tip structure 41 can be in a ring shape and surround the display area AA.

[0043] In another embodiment, the first tip structure 41 can include a plurality of sub-tip structures 411, and the cross-sectional area of each sub-tip structure 411 gradually decreases in the direction towards the liquid crystal layer 3. The plurality of sub-tip structures 411 can be arranged around the display area AA. The plurality of sub-tip structures 411 can be arranged without intervals, that is, the bottoms of any two adjacent sub-tip structures 411 are connected. The plurality of sub-tip structures 411 can also be arranged at intervals, that is, the bottoms of any two adjacent sub-tip structures 411 are spaced apart. It should be noted that the tops of any two adjacent sub-tip structures 411 are spaced apart. When the plurality of sub-tip structures 411 are arranged at intervals, the first alignment layer 6 covers the plurality of sub-tip structures 411 and the first substrate 1 between the plurality of sub-tip structures 411, to ensure that the ionic charges in the liquid crystal layer 3 are diffused to each sub-tip structure 411 through the first alignment layer 6 and improve the dissipation speed of the ionic charges.

[0044] The cross-section of the sub-tip structure 411 can be in a regular shape, such as a circle, an ellipse, a polygon, etc. The cross-section of the sub-tip structure 411 can also be in an irregular shape, as long as it can ensure that the sub-tip structure 411 gradually decreases in the direction A towards the liquid crystal layer 3, and no specific limitation is made here. The shapes of different sub-tip structures 411 can be the same or different. For example, each sub-tip structure 411 is in a conical shape. It can be understood that under the action of a strong electric field, the surface curvature of the sub-tip structure 411 is large, the equipotential surface is dense, and the electric field intensity increases sharply, so that the air near the sub-tip structure 411 is ionized to generate gas discharge. The sub-tip structure 411 is in a conical shape, so that the discharge effect of the sub-tip structure 411 can reach the best as much as possible.

[0045] As Figure 1 shown, the display panel further includes a second alignment layer 7, the second alignment layer 7 is located between the second substrate 2 and the liquid crystal layer 3, and the second alignment layer 7 covers the display area AA, so that the second alignment layer 7 covers the liquid crystal layer 3. The second alignment layer 7 can achieve full coverage, that is, the second alignment layer 7 covers the display area AA and the non-display area NA, to ensure that the thickness of the second alignment layer 7 in the display area AA is consistent, avoid the problem of uneven display, and improve the display uniformity.

[0046] As Figure 2 shown, the first alignment layer 6 can include two layers, namely a first sub-alignment layer 61 and a second sub-alignment layer 62. The first sub-alignment layer 61 is a photosensitive alignment layer, that is, the first sub-alignment layer 61 is disposed close to the liquid crystal layer 3 for alignment after photosensitization. The second sub-alignment layer 62 is a non-photosensitive alignment layer, that is, the second sub-alignment layer 62 is disposed close to the first conductive layer 4 for charge and ion conduction in the liquid crystal layer 3. That is to say, the first sub-alignment layer 61 is located between the first conductive layer 4 and the liquid crystal layer 3, and the second sub-alignment layer 62 is located between the first conductive layer 4 and the first sub-alignment layer 61.

[0047] The second alignment layer 7 can include two layers, namely a third sub-alignment layer 71 and a fourth sub-alignment layer 72. The third sub-alignment layer 71 is a photosensitive alignment layer, that is, the third sub-alignment layer 71 is disposed close to the liquid crystal layer 3 for alignment after photosensitization. The fourth sub-alignment layer 72 is a non-photosensitive alignment layer, that is, the fourth sub-alignment layer 72 is disposed close to the second substrate 2 for charge and ion conduction in the liquid crystal layer 3. That is to say, the third sub-alignment layer 71 is located between the second substrate 2 and the liquid crystal layer 3, and the fourth sub-alignment layer 72 is located between the second substrate 2 and the third sub-alignment layer 71.

[0048] The display panel may further include a sealant 5, the sealant 5 is located in the non-display area NA and is disposed around the display area AA to encapsulate the liquid crystal layer 3 between the first substrate 1 and the second substrate 2. Specifically, the sealant 5 is located between the first alignment layer 6 and the second substrate 2, and more specifically, the sealant 5 is located between the first alignment layer 6 and the second alignment layer 7, and the sealant 5 corresponds to the position of the first tip structure 41. The thickness of the first alignment layer 6 is less than the thickness of the first conductive layer 4, that is, the thickness of the first alignment layer 6 is less than the height of the first tip structure 41. Therefore, after the first alignment layer 6 covers the first tip structure 41, the first tip structure 41 will not be filled (when the first tip structure 41 includes a plurality of sub-tip structures 411, the first alignment layer 6 will not fill the gap between the tops of the plurality of sub-tip structures 411). The surface of the first alignment layer 6 on the side facing away from the first tip structure 41 is uneven, and the sealant 5 covers the uneven first alignment layer 6, which can increase the intrusion path of external water and oxygen and improve the sealing effect.

[0049] AsFigure 3 As shown, multiple sub-tip structures 411 are arranged in multiple rows, and any two adjacent rows of sub-tip structures 411 are staggeredly distributed. This staggered distribution method further increases the intrusion path of external water and oxygen in the sealant 5, improves the water and oxygen barrier effect, and thus improves the reliability of HTHHO (High Temperature High Humidity Operation).

[0050] It should be noted that there is no conductive layer between the second substrate 2 and the second alignment layer 7 of some display panels, such as FFS (Fringe Field Switching) type display panels or IPS (In-Plane Switching) type display panels, etc. There is also a conductive layer between the second substrate 2 and the second alignment layer 7 of some display panels.

[0051] As Figure 4 shown, the display panel further includes a second conductive layer 8, and the second conductive layer 8 is located between the second alignment layer 7 and the second substrate 2. The second conductive layer 8 may include electrodes located in the display area AA, and the second conductive layer 8 may further include second tip structures 81 located in the non-display area NA, and the cross-sectional area of the second tip structures 81 gradually decreases in the direction towards the liquid crystal layer 3. Among them, the cross-sectional area of the second tip structures 81 refers to the cross-sectional area of the second tip structures 81 in the direction parallel to the liquid crystal layer 3.

[0052] The second alignment layer 7 covers the display area AA and covers the second tip structures 81 of the second conductive layer 8. After the ionic charges in the liquid crystal layer 3 are aggregated, the ionic charges diffuse to the non-display area NA through the first alignment layer 6 to quickly discharge through the first tip structures 41, and at the same time, they also diffuse to the non-display area NA through the second alignment layer 7 to quickly discharge through the second tip structures 81. The simultaneous discharge of the first tip structures 41 and the second tip structures 81 further improves the ion dissipation speed, thereby increasing the time for the display panel to display without afterimages and improving the display effect. In addition, the surface of the second tip structures 81 in contact with the second alignment layer 7 is uneven, increasing the contact area between the second tip structures 81 and the second alignment layer 7 and reducing the peeling risk of the second alignment layer 7.

[0053] The second tip structures 81 can be arranged around the display area AA. After the ionic charges are aggregated in the liquid crystal layer 3, the aggregated ionic charges can be quickly discharged from the periphery of the liquid crystal layer 3 through the second tip structures 81, further improving the ionic charge dissipation speed.

[0054] In one embodiment, the second tip structures 81 can be only one structure. For example, the second tip structures 81 can be in a ring shape and surround the display area AA.

[0055] In another embodiment, the second tip structure 81 may include a plurality of sub-tip structures 811, and the cross-sectional area of each sub-tip structure 811 gradually decreases in the direction toward the liquid crystal layer 3. The plurality of sub-tip structures 811 may be arranged around the display area AA. The plurality of sub-tip structures 811 may be arranged without spacing or may be arranged at intervals. When the plurality of sub-tip structures 811 are arranged at intervals, the second alignment layer 7 covers the plurality of sub-tip structures 811 and the second substrate 2 between the plurality of sub-tip structures 811. The provision of the second alignment layer 7 ensures that the ionic charges in the liquid crystal layer 3 can diffuse to each sub-tip structure 811, thereby increasing the ionic charge dissipation rate.

[0056] The cross section of the sub-tip structure 811 may be a regular shape, such as a circle, an ellipse, a polygon, and the like. The cross section of the sub-tip structure 811 may also be an irregular shape, as long as it can be ensured that the sub-tip structure 811 gradually decreases in the direction C toward the liquid crystal layer 3, and no specific limitation is made here. The shapes of different sub-tip structures 811 may be the same or different. The shape of the sub-tip structure 811 may be the same as or different from that of the sub-tip structure 411. For example, each sub-tip structure 811 is a cone. The sub-tip structure 811 is a cone, so that the discharge effect of the sub-tip structure 811 is as optimal as possible.

[0057] In this embodiment, the sealant 5 is located between the first alignment layer 6 and the second alignment layer 7, and the sealant 5 corresponds to the positions of the first tip structure 41 and the second tip structure 81. Similarly, the thickness of the second alignment layer 7 is less than the height of the first tip structure 41, so that the second alignment layer 7 will not fill the second tip structure 81. The surface of the second alignment layer 7 on the side away from the second tip structure 81 is uneven, and the sealant 5 covers the uneven second alignment layer 7, further increasing the intrusion path of external water and oxygen, and improving the sealing effect.

[0058] The plurality of sub-tip structures 811 are arranged in multiple rows, and any two rows of sub-tip structures 811 are staggered. This staggered distribution further increases the intrusion path of external water and oxygen in the sealant 5, improves the water and oxygen barrier effect, and thus improves the reliability of the HTHHO.

[0059] When the display panel has the first conductive layer 4 and does not have the second conductive layer 8, the display panel is clicked with a 1KV electrostatic gun to detect the residual charge amount in the liquid crystal layer 3, as shown in Table 1. It can be seen from Table 1 that at the 0th second, the residual charge amounts in the liquid crystal layers of the present embodiment and the prior art are the same, both being 10000 C. Then, in the prior art, through the discharge of the conventional conductive layer, the residual charge amount in the liquid crystal layer is still 8000 C after 1 s, and the residual charge amount in the liquid crystal layer only drops to 1100 C after 10 s. However, in the present embodiment, the ionic charges in the liquid crystal layer 3 diffuse to the first tip structure 41 in the first conductive layer 4 through the first alignment layer 6, and are quickly discharged through the first tip structure 41, as Figure 5 shown. In the present embodiment, the residual charge amount in the liquid crystal layer 3 quickly drops to 4600 C after 1 s, can drop to 1080 C after 3 s, and only has 65 C after 10 s. It can be seen that the present embodiment can effectively improve the dissipation speed of the ionic charges in the liquid crystal layer 3 compared with the prior art.

[0060]

[0061] Table 1

[0062] In summary, in the embodiment of the present application, by providing the first conductive layer and the first alignment layer, the first conductive layer includes the first tip structure located in the non-display area, and the first alignment layer covers the first tip structure, so that after the ionic charges in the liquid crystal layer are aggregated, they diffuse to the non-display area through the first alignment layer, and then are quickly discharged through the first tip structure, improving the ion dissipation speed, thereby increasing the time for the display panel to display without afterimage and improving the display effect.

[0063] In conclusion, although the present application has been disclosed above with preferred embodiments, the above preferred embodiments are not intended to limit the present application. Those of ordinary skill in the art can make various changes and modifications without departing from the spirit and scope of the present application. Therefore, the protection scope of the present application shall be subject to the scope defined by the claims.

Claims

1. A display panel, characterized in that, It includes a display area and a non-display area located outside the display area. The display panel includes: A first substrate; A second substrate, which is disposed opposite to the first substrate; A liquid crystal layer, which is located between the first substrate and the second substrate and corresponds to the display area; A first conductive layer, which is located between the first substrate and the liquid crystal layer. The first conductive layer further includes a first tip structure located in the non-display area, and the cross-sectional area of the first tip structure gradually decreases in the direction towards the second substrate; A first alignment layer, which is located between the first conductive layer and the liquid crystal layer and extends to the non-display area to cover the first tip structure; Sealant, which is located between the first alignment layer and the second substrate, and the sealant corresponds to the position of the first tip structure; Wherein, after the ionic charges in the liquid crystal layer accumulate, the ionic charges diffuse through the first alignment layer to the non-display area to discharge through the first tip structure.

2. The display panel according to claim 1, wherein The first tip structure is arranged around the display area.

3. The display panel according to claim 1, characterized in that, The first tip structure includes a plurality of sub-tip structures; The cross-sectional area of the sub-tip structure gradually decreases in the direction towards the liquid crystal layer.

4. The display panel according to claim 3, wherein The plurality of sub-tip structures are spaced apart, and the first alignment layer covers the plurality of sub-tip structures and the first substrate between the plurality of sub-tip structures.

5. The display panel according to claim 3, wherein The plurality of sub-tip structures are arranged in multiple rows, and any two adjacent rows of sub-tip structures are staggered.

6. The display panel according to claim 3, wherein The sub-tip structure is in a conical shape.

7. The display panel according to claim 1, characterized in that, The display panel further includes: A second alignment layer, which is located between the second substrate and the liquid crystal layer, and the second alignment layer completely covers the display area.

8. The display panel according to claim 7, wherein The display panel further includes: A second conductive layer, which is located between the second alignment layer and the second substrate.

9. The display panel according to claim 8, wherein The second conductive layer further includes a second tip structure located in the non-display area, and the cross-sectional area of the second tip structure gradually decreases in the direction towards the first substrate; The second alignment layer also extends to the non-display area to cover the second tip structure of the second conductive layer. After the ionic charges in the liquid crystal layer accumulate, the ionic charges diffuse through the second alignment layer to the non-display area to discharge through the second tip structure.

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