Transfer printing plate, transfer printing device, display panel and display device

Abstract

The invention relates to a transfer printing plate which is used for transferring an alignment film on a substrate to be transferred, the transfer printing plate comprises a rectangular first transfer printing area, at least one corner of the first transfer printing area is concave inwards to form a step structure, the step structure comprises adjacent linear parts, and the linear parts are parallel to the corresponding edges of the first transfer printing area. The invention further relates to a transfer printing device, a display panel and a display device. The area of the corners of the alignment film formed through transfer printing of the transfer printing plate is reduced, so that the overlapping area of the alignment film and the frame sealing glue is reduced, the adhesive force of the frame sealing glue at the corners is improved, and the breakage rate of the corners is reduced. The adjacent straight line parts in the step structures are parallel to the corresponding edges of the first transfer printing area, so that the boundary positions of the corners of the formed alignment film can be accurately controlled, the distances between the corners of the alignment film and the corresponding boundaries of the effective display area are kept consistent, and the abnormal display problem caused by the fact that the alignment film does not cover the AA area can be avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of liquid crystal product manufacturing, and in particular to a transfer plate, a transfer device, a display panel and a display device. Background Art

[0002] In the display industry, for handheld products such as pads, it is usually necessary to evaluate their drop resistance. The main evaluation method is to drop them at different angles and for different numbers of times from a certain height (usually 1 meter). In narrow-frame products, due to the narrow frame, the PI EM value (the distance between the PI (alignment film) boundary and the boundary of the AA area (active display area)) is more difficult to control. Therefore, Full APRPlate (PI liquid full coating design, commonly used for narrow frame) is usually adopted. In this design, the PI and sealant (frame sealing glue) are completely overlapped. Since the PI and sealant completely overlap at the corners in the Full APR Plate method, the sealant adhesion at the corners is weakened, and the probability of corner damage increases in the drop test. Summary of the Invention

[0003] In order to solve the above technical problems, the present invention provides a transfer plate, a transfer device, a display panel and a display device, which solve the problem of high corner damage rate caused by complete overlap of the alignment film and the frame sealant.

[0004] In order to achieve the above-mentioned purpose, the technical solution adopted in an embodiment of the present invention is: a transfer plate for transferring an alignment film on a substrate to be transferred, the transfer plate including a first transfer area in a rectangular shape, at least one corner of the first transfer area being concave to form a step structure, the step structure including adjacent straight line portions, the straight line portions being parallel to the corresponding edges of the first transfer area.

[0005] Optionally, the first transfer area includes a first side corresponding to the binding side of the substrate to be transferred and a second side corresponding to the non-binding side of the substrate to be transferred, and the first side and the second side are arranged opposite to each other;

[0006] At least one corner of the first side is concave to form a single-step structure, and at least one corner of the second side is concave to form a double-step structure.

[0007] Optionally, the transfer plate further includes a display corresponding area corresponding to the effective display area of ​​the substrate to be transferred;

[0008] The single-step structure includes a first straight portion connected to the first side, and the first straight portion is arranged perpendicular to the first side;

[0009] The distance between the first straight portion and the side corresponding to the display corresponding area is a first distance, the distance between the first side and the side corresponding to the display corresponding area is a second distance, and the first distance and the second distance are equal.

[0010] Optionally, the transfer plate further includes a display corresponding area corresponding to the effective display area of ​​the substrate to be transferred;

[0011] The double-step structure includes a third straight portion, a fourth straight portion, and a fifth straight portion, wherein one end of the third straight portion is connected to the second side, the fourth straight portion is connected between the third straight portion and the fifth straight portion, the fourth straight portion is arranged parallel to the second side, and the fifth straight portion is arranged perpendicular to the second side;

[0012] The distance between the fourth straight line portion and the side corresponding to the display corresponding area is a third distance, the distance between the fifth straight line portion and the side corresponding to the display corresponding area is a fourth distance, and the third distance and the fourth distance are equal.

[0013] Optionally, the transfer plate includes a plurality of first transfer areas arranged in an array, and the plurality of first transfer areas include a first sub-transfer area and a second sub-transfer area adjacent to each other in a direction perpendicular to the first side.

[0014] A second transfer region is provided between the single-step structure of the first sub-transfer region and the corresponding double-step structure of the second sub-transfer region;

[0015] There is a gap between the second transfer area and the first sub-transfer area and the second sub-transfer area.

[0016] Optionally, the second transfer area is in a cross, circular or square shape.

[0017] Optionally, the transfer plate includes at least one first area, the first area includes at least one first transfer area, and a third transfer area is provided around the edge of the first area along a circumferential direction of the first area;

[0018] The third transfer region is spaced apart from the first transfer region, and the third transfer region is spaced apart from the second transfer region.

[0019] Optionally, the transfer plate further includes a first corresponding area corresponding to the alignment mark on the substrate to be transferred, and the first corresponding area is located at the periphery of the single-step structure and / or the double-step structure.

[0020] Optionally, a notch is provided in the middle area of ​​the first side and / or the second side, and the transfer plate further includes a second corresponding area corresponding to the alignment mark on the substrate to be transferred, and the second corresponding area is located at the notch.

[0021] An embodiment of the present invention further provides a transfer device including the above-mentioned transfer plate.

[0022] An embodiment of the present invention further provides a display panel, comprising a first substrate and a second substrate disposed opposite to each other, a liquid crystal layer between the first substrate and the second substrate, and a frame sealant encapsulating the liquid crystal layer, wherein the liquid crystal layer is sealed in a sealed space formed by the first substrate, the second substrate, and the frame sealant.

[0023] The display panel also includes an alignment film formed by transfer by the above-mentioned transfer device. The alignment film is provided on the side of the first substrate and / or the second substrate close to the liquid crystal layer. The orthographic projection of the alignment film on the first substrate partially overlaps with the orthographic projection of the sealing glue on the first substrate.

[0024] Optionally, the first substrate and the second substrate are both rectangular, the alignment film includes a first portion corresponding to the first transfer area, and the shape of the first portion is a rectangle that matches the shape of the first substrate;

[0025] The orthographic projection of the corner of the first part on the first substrate is located on one side of the orthographic projection of the frame sealing glue on the first substrate, or the orthographic projection of the corner of the first part on the first substrate partially overlaps with the orthographic projection of the frame sealing glue on the first substrate.

[0026] Optionally, the first transfer area includes a first side edge corresponding to the binding side of the to-be-transferred substrate, the transfer plate includes a plurality of first transfer areas arranged in an array, the plurality of first transfer areas include a first sub-transfer area and a second sub-transfer area adjacently arranged in a direction perpendicular to the first side edge, and a second transfer area is provided between the single-step structure of the first sub-transfer area and the corresponding double-step structure of the second sub-transfer area;

[0027] The alignment film further includes a second portion corresponding to the second transfer area, and an orthographic projection of the second portion on the first substrate is located on one side of an orthographic projection of the frame sealant on the first substrate.

[0028] An embodiment of the present invention further provides a display device, comprising the above-mentioned display panel.

[0029] The beneficial effects of the present invention are as follows: the transfer plate provided by the embodiment of the present invention includes a first transfer area that forms the main part of the alignment film, and at least one corner of the first transfer area is concave to form a step structure, which reduces the area of ​​the corners of the alignment film formed by transfer of the transfer plate, thereby reducing the overlapping area of ​​the alignment film and the frame sealing glue, thereby improving the adhesion of the frame sealing glue at the corners and reducing the corner breakage rate.

[0030] In an embodiment of the present invention, the corners of the first transfer area are concave to form a step structure, and the step structure includes adjacent straight portions, which are parallel to the corresponding edges of the first transfer area, which is conducive to accurately controlling the boundary position of the formed alignment film at the corners, so that the EM value of the alignment film in the R / L and U / D directions at the corners (PI~AA distance, that is, the distance from the boundary of the alignment film to the corresponding boundary of the effective display area) remains consistent, which can avoid abnormal display problems caused by the alignment film not covering the AA area. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 A schematic diagram showing a transfer plate in the related art;

[0032] Figure 2 A schematic diagram showing a transfer plate in an embodiment of the present invention;

[0033] Figure 3 A schematic diagram showing a transfer plate in an embodiment of the present invention;

[0034] Figure 4 A schematic diagram showing a transfer plate in an embodiment of the present invention;

[0035] Figure 5 A schematic diagram showing a transfer plate in an embodiment of the present invention;

[0036] Figure 6 A schematic diagram showing a transfer plate in an embodiment of the present invention.

[0037] 1. First transfer area; 2. Second transfer area; 3. Third transfer area; 4. Double-step structure; 5. Single-step structure; 6. First notch; 7. Second notch; 8. Sealing glue corresponding area; 9. Outer sealing glue corresponding area; 10. First corresponding area; 11. Display corresponding area boundary; 12. First side; 13. Second side; 14. First straight portion; 17. Second straight portion; 15. Fourth straight portion; 16. Fifth straight portion; 100. Binding area corresponding area. DETAILED DESCRIPTION

[0038] To make the purpose, technical solutions, and advantages of the embodiments of the present disclosure more clear, the technical solutions of the embodiments of the present disclosure will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present disclosure. Obviously, the described embodiments are part of the embodiments of the present disclosure, not all of the embodiments. Based on the described embodiments of the present disclosure, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present disclosure.

[0039] Unless otherwise defined, the technical or scientific terms used in this disclosure should have the usual meanings understood by people with ordinary skills in the field to which this disclosure belongs. The words "first", "second" and similar words used in this disclosure do not indicate any order, quantity or importance, but are only used to distinguish different components. Similarly, words such as "one", "an" or "the" do not indicate a quantity limitation, but rather indicate the existence of at least one. Words such as "include" or "comprise" mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. Words such as "connect" or "connected" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the object being described changes, the relative positional relationship may also change accordingly.

[0040] refer to Figure 2-Figure 6 As shown, an embodiment of the present invention provides a transfer plate for transferring an alignment film onto a substrate to be transferred, the transfer plate comprising a first transfer area 1 in a rectangular shape, at least one corner of the first transfer area 1 being concave to form a step structure, the step structure comprising adjacent straight line portions, the straight line portions being parallel to corresponding edges of the first transfer area 1.

[0041] It should be noted that the first transfer area 1 is rectangular, and the step structure may include one step, two steps, or multiple steps, and each step includes two step portions arranged perpendicular to each other, that is, two adjacent straight line portions, and each of the straight line portions is arranged parallel to the long side or short side of the first transfer area.

[0042] Specifically, the first transfer area is a rectangle that matches the shape of the substrate to be transferred (the substrate to be transferred is a rectangle, and the AA area on the substrate to be transferred is a rectangle), the substrate to be transferred is the first transfer area includes a first side corresponding to the binding side of the substrate to be transferred, a second side opposite to the first side, a third side and a fourth side adjacent to the first side and the second side, and the step structure includes a straight line portion in the adjacent straight line portion includes Figure 3The first straight portion 14 and the second straight portion 17 in the step structure are parallel to the third side and perpendicular to the first side, and the second straight portion 17 is parallel to the first side. The step structure includes adjacent straight portions, and the straight portions include the fourth straight portion 15 and the fifth straight portion 16. The fourth straight portion 15 is parallel to the second side, and the fifth straight portion 16 is parallel to the third side and perpendicular to the second side.

[0043] Figure 1 In the schematic diagram of the transfer plate in the related art shown, a Full APR Plate method is adopted, that is, a PI liquid full coating design. The transfer plate provided by the embodiment of the present invention includes a first transfer area 1 that forms the main part of the alignment film. At least one corner of the first transfer area 1 is concave to form a step structure, which reduces the area of ​​the corners of the alignment film formed by transfer of the transfer plate, thereby reducing the overlapping area of ​​the alignment film and the frame sealing glue, thereby improving the adhesion of the frame sealing glue at the corners and reducing the corner breakage rate.

[0044] In the embodiment of the present invention, the corners of the first transfer area 1 are concave to form a step structure, and the step structure includes adjacent straight line portions, and the straight line portions are parallel to the corresponding sides of the first transfer area 1. Figure 3 The side edges of the first transfer area are extended along the X direction or the Y direction, and the straight portion constituting the step structure is extended along the X direction or the Y direction, which is conducive to accurately controlling the boundary position of the formed alignment film at the corner, so that the EM value (PI~AA distance, that is, the distance from the boundary of the alignment film to the corresponding boundary of the effective display area) of the alignment film in the R / L (direction extending from the left to the right) and U / D (direction from the top to the bottom) directions at the corner is consistent, which can avoid abnormal display problems caused by the alignment film not covering the AA area.

[0045] refer to Figure 3 In an exemplary embodiment, the first transfer area 1 includes a first side 12 corresponding to the binding side of the substrate to be transferred and a second side 13 corresponding to the non-binding side of the substrate to be transferred, and the first side 12 and the second side 13 are arranged opposite to each other;

[0046] At least one corner of the first side 12 is concave to form a single-step structure 5 , and at least one corner of the second side 13 is concave to form a double-step structure 4 .

[0047] It should be noted that a binding area is provided on the binding side of the substrate to be transferred, and the binding area is provided with IC, solder pads, etc. In order to avoid affecting the binding connection of the substrate to be transferred, the frame sealing glue and the alignment film formed by transferring the transfer plate need to avoid the solder pads. On the binding side, the alignment film and the frame sealing glue partially overlap.

[0048] The first transfer area 1 is rectangular, the alignment film formed by transferring the first transfer area 1 is rectangular, the frame-sealing glue is a rectangular frame structure, and the frame-sealing glue corresponding area 8 corresponding to the frame-sealing glue is a rectangular frame structure. The frame-sealing glue corresponding area 8 includes a first frame corresponding to the first side 12, and a second frame corresponding to the second side 13, and a third frame adjacent to the first frame and the second frame. In a direction perpendicular to the extension direction of the first side 12, the first side 12 divides the first frame into a first sub-frame and a second sub-frame. A single-step structure 5 is set on the first side 12, so that part of the third frame is exposed outside the first transfer area 1.

[0049] Generally, on the non-binding side, the alignment film and the frame-sealing glue completely overlap. In this embodiment, a double-step structure is set on the second side 13, so that part of the second frame and part of the third frame are exposed in the first transfer area 1, which effectively increases the adhesion of the frame-sealing glue at the corners of the substrate to be transferred and reduces the breakage rate of the corners of the display panel.

[0050] In an exemplary embodiment, the transfer plate further includes a display corresponding area corresponding to the effective display area of ​​the substrate to be transferred;

[0051] The single-step structure 5 includes a first straight portion 14 connected to the first side 12, and the first straight portion 14 is perpendicular to the first side 12;

[0052] The distance between the first straight line portion 14 and the side corresponding to the display corresponding area (reference Figure 3 , here refers to the distance between the first straight portion 14 and the AA area boundary 11 in the X direction) is the first distance, the distance between the first side 12 and the side corresponding to the display corresponding area (reference Figure 3 , here referring to the distance between the first side edge 12 and the AA area boundary 11 in the X direction) is the second distance, and the first distance and the second distance are equal. Maintaining the EM value (PI-AA distance, i.e., the distance from the alignment film boundary to the corresponding boundary of the active display area) at the corners in the R / L (left-to-right) and U / D (top-to-bottom) directions of the alignment film can avoid abnormal display issues caused by the alignment film not covering the AA area.

[0053] In an exemplary embodiment, the first distance is greater than or equal to 1.5 mm, which facilitates coating process control and prevents peripheral Mura (uneven brightness and darkness), but is not limited thereto.

[0054] Exemplarily, the first straight portion 14 is located in the middle of the corresponding frame of the corresponding frame-sealing adhesive region 8 , and the first side edge 12 is located in the middle of the corresponding frame of the frame-sealing adhesive region 8 .

[0055] In an exemplary embodiment, the transfer plate further includes a display corresponding area corresponding to the effective display area of ​​the substrate to be transferred;

[0056] The double-step structure 4 includes a third straight portion, a fourth straight portion 15, and a fifth straight portion 16. One end of the third straight portion is connected to the second side 13. The fourth straight portion 15 is connected between the third straight portion and the fifth straight portion 16. The fourth straight portion 15 is arranged parallel to the second side 13. The fifth straight portion 16 is arranged perpendicular to the second side 13.

[0057] The distance between the fourth straight line portion 15 and the side corresponding to the display corresponding area (refer to Figure 3 , here refers to the distance between the fourth straight line portion 15 and the AA area boundary 11 in the Y direction) is the third distance, the distance between the fifth straight line portion 16 and the corresponding side of the display corresponding area (reference Figure 3 Here, the distance between the fifth straight portion 16 and the AA area boundary 11 in the X direction is the fourth distance, and the third and fourth distances are equal. Maintaining consistent EM values ​​(PI-AA distance, i.e., the distance from the alignment film boundary to the corresponding boundary of the active display area) at the corners in the R / L (left-to-right) and U / D (top-to-bottom) directions can avoid display abnormalities caused by the alignment film not covering the AA area.

[0058] In an exemplary embodiment, the third distance is greater than or equal to 1.5 mm, which facilitates coating process control and prevents peripheral Mura, but is not limited thereto.

[0059] Exemplarily, the fourth straight portion 15 is located in the middle of the corresponding frame of the corresponding frame-sealing adhesive region 8 , and the fifth straight portion 16 is located in the middle of the corresponding frame of the corresponding frame-sealing adhesive region 8 .

[0060] In an exemplary embodiment, the four corners of the first transfer area 1 are provided with a step structure, the two corners of the first side 12 are provided with a single-step structure 5, and the two corners of the second side 13 are provided with a double-step structure 4, and each corner partially overlaps with the corresponding area 8 of the frame sealant, and the overlapping area of ​​each corner with the corresponding area 8 of the frame sealant is the same, thereby ensuring the uniformity of the corners of the formed alignment film.

[0061] In an exemplary embodiment, the transfer plate includes a plurality of first transfer areas 1 arranged in an array, wherein the plurality of first transfer areas 1 include a first sub-transfer area and a second sub-transfer area adjacently disposed in a direction perpendicular to the first side 12, and a second transfer area 2 is disposed between the single-step structure 5 of the first sub-transfer area and the corresponding double-step structure 4 of the second sub-transfer area;

[0062] There is a gap between the second transfer area 2 and the first sub-transfer area and the second sub-transfer area.

[0063] Due to the presence of the step structure, the thickness of the alignment film on the substrate to be transferred is uneven, resulting in support differences. To solve this problem, the second transfer area 2 is provided on the transfer plate to improve the uniformity of the distribution of the alignment film.

[0064] The transfer plate includes a plurality of the first transfer areas 1, and can simultaneously transfer a plurality of substrates to be transferred on the same motherboard, thereby improving transfer efficiency.

[0065] In an exemplary embodiment, the shape of the second transfer area 2 is a cross, a circle or a square. Figure 5 The second transfer area 2 is a square. Figure 6 The second transfer area is circular, but not limited thereto.

[0066] Exemplarily, the second transfer region 2 is located on one side of the region 8 corresponding to the frame sealant, that is, the second transfer region 2 does not overlap with the region 8 corresponding to the frame sealant at all.

[0067] Exemplarily, the second transfer region 2 is located in the middle of the step structure, so that there is a gap between the second transfer region 2 and the first transfer region 1, and it is beneficial to improve the uniformity of the alignment film formed by transfer of the transfer plate.

[0068] In an exemplary embodiment, the transfer plate includes at least one first area (refer to Figure 2 The first region includes at least one first transfer region 1, and a third transfer region 3 is provided around the edge of the first region along the circumferential direction of the first region;

[0069] The third transfer region 3 is spaced apart from the first transfer region 1 , and the third transfer region 3 is spaced apart from the second transfer region 2 .

[0070] Exemplarily, the distance between the second transfer area 2 and the third transfer area 3 is greater than or equal to 2 mm, but is not limited thereto.

[0071] Exemplarily, an outer frame-sealing glue corresponding area 9 is provided at the edge of the first area, and the distance between the second transfer area 2 and the outer frame-sealing glue corresponding area 9 is greater than or equal to 2 mm, so as to avoid the second transfer area 2 and the outer frame-sealing glue corresponding area 9 from overlapping, and avoid the alignment film formed on the second transfer area 2 and the frame-sealing glue formed on the outer frame-sealing glue corresponding area 9 from overlapping, thereby avoiding the problem of reduced yield in the subsequent thinning process.

[0072] In an exemplary embodiment, the transfer plate further includes a first corresponding area 10 corresponding to the alignment mark on the substrate to be transferred, and the first corresponding area 10 is located at the periphery of the single-step structure 5 and / or the double-step structure 4.

[0073] The substrate to be transferred is an array substrate or a color filter substrate. Alignment marks are provided on the array substrate or color filter substrate to facilitate alignment of the array substrate and the color filter substrate. To prevent the contrast marks from being covered and difficult to identify, the transfer alignment film needs to be positioned away from the substrate. Specifically, the first corresponding area 10 is located outside the single-step structure 5 and / or the double-step structure 4.

[0074] In an exemplary embodiment, a notch is provided in the middle area of ​​the first side 12 and / or the second side 13 (refer to Figure 2 The transfer plate further includes a first notch 6 and a second notch 7), and the transfer plate further includes a second corresponding area corresponding to the alignment mark on the substrate to be transferred, and the second corresponding area is located at the notch.

[0075] In order to facilitate the alignment of the array substrate and the color filter substrate, multiple alignment marks will be set on the array substrate or the color filter substrate. The position of the alignment mark can be set according to actual needs. The gap is set to avoid the second corresponding area to avoid covering the alignment mark.

[0076] It should be noted that the number, specific setting position and specific shape of the notches can be set according to the setting position, setting number and shape of the alignment mark. For example, in some embodiments, a first notch 6 is provided in the middle area of ​​the first side 12, and the first notch is in a U-shaped structure. A second notch 7 is provided in the middle area of ​​the second side 13. In some specific embodiments, the second notch 7 includes a first sub-notch, the first sub-notch is in a U-shaped structure, including a bottom edge set toward its opening, the second notch 7 also includes a second sub-notch, the second sub-notch is formed by a concave portion of the bottom edge, and the first sub-notch and the second sub-notch are connected so that the second notch 7 is in a convex structure, refer to Figure 2 .

[0077] In an exemplary embodiment, the distance between the boundary of the first transfer area 1 and the first corresponding area 10 or the second corresponding area is greater than or equal to 2 mm, ensuring that the TP Mark (alignment mark) is not covered, thereby preventing the TP Mark from being difficult to identify during production.

[0078] It should be noted that the first transfer area 1 , the second transfer area 2 , and the third transfer area 3 are all transfer protrusions provided on the base of the transfer plate to facilitate transfer, but the present invention is not limited thereto.

[0079] An embodiment of the present invention further provides a transfer device including the above-mentioned transfer plate.

[0080] The transfer plate includes a substrate and transfer protrusions formed on the substrate, and the transfer protrusions include the first transfer area 1, the second transfer area 2 and the third transfer area 3.

[0081] The transfer device also includes a printing roller, the transfer plate is wound on the printing roller, and the substrate to be transferred is set on a transmission platform for horizontal transmission. When the substrate to be transferred is transmitted to the bottom of the printing roller, one side of the transfer plate just contacts the substrate to be transferred, and then relying on the rotation of the printing roller and the horizontal transmission of the transmission platform, the transfer plate coats the PI (polyimide) liquid on the substrate to be transferred, so that the PI liquid forms a PI film (i.e., alignment film) on the substrate to be transferred.

[0082] An embodiment of the present invention further provides a display panel, comprising a first substrate and a second substrate disposed opposite to each other, a liquid crystal layer between the first substrate and the second substrate, and a frame sealant encapsulating the liquid crystal layer, wherein the liquid crystal layer is sealed in a sealed space formed by the first substrate, the second substrate, and the frame sealant.

[0083] The display panel also includes an alignment film formed by transfer by the above-mentioned transfer device. The alignment film is provided on the side of the first substrate and / or the second substrate close to the liquid crystal layer. The orthographic projection of the alignment film on the first substrate partially overlaps with the orthographic projection of the sealing glue on the first substrate.

[0084] By forming a step structure at least one corner of the first transfer region 1 on the transfer plate, the area of ​​the corner of the alignment film is reduced, thereby reducing the overlapping area of ​​the alignment film and the frame sealant, and improving the adhesion of the frame sealant at the corner.

[0085] At least one corner of the first transfer area 1 of the transfer plate forms a step structure, and the step structure includes two adjacent straight portions, each of which is parallel to the corresponding edge of the first transfer area 1, so that the distance between the boundary at the corner of the alignment film and the AA area can be accurately controlled, avoiding the problem that the alignment film cannot completely cover the display area.

[0086] In an exemplary embodiment, the first substrate and the second substrate are both rectangular, and the alignment film includes a first portion corresponding to the first transfer area 1 , wherein the shape of the first portion is a rectangle that matches the shape of the first substrate;

[0087] The orthographic projection of the corner of the first part on the first substrate is located on one side of the orthographic projection of the frame sealing glue on the first substrate, or the orthographic projection of the corner of the first part on the first substrate partially overlaps with the orthographic projection of the frame sealing glue on the first substrate.

[0088] In an exemplary embodiment, the four corners of the alignment film overlap with a portion of the frame sealant, and the overlapping areas of the four corners of the alignment film and the frame sealant are the same, so as to improve the uniformity of the alignment film.

[0089] Illustratively, in a direction perpendicular to a corresponding side of the alignment film, a width of an overlapping region between the alignment film and the frame-sealing adhesive is 8-10 mm, but the present invention is not limited thereto.

[0090] In an exemplary embodiment, the first substrate includes a binding side and a non-binding side arranged opposite to each other, the first substrate includes a binding area arranged on the binding side, the binding area is provided with an IC, binding pins, etc., the first substrate includes an effective display area and a non-display area, the binding area is located in the non-display area, the alignment film includes a first boundary arranged near the binding area, in order to avoid covering the binding pins, etc. to cause the binding device in the binding area to be isolated, the orthographic projection of the first boundary on the first substrate is located within the orthographic projection of the sealing glue on the first substrate, the side of the alignment film close to the binding area partially overlaps with the sealing glue, in order to reduce the overlapping area of ​​the corners of the alignment film in the sealing glue, a single-step structure 5 is provided at two corners of the first boundary, the orthographic projection of a straight line portion of the single-step structure 5 connected to the first boundary on the first substrate is located within the orthographic projection of the sealing glue on the first substrate, and the distance from the first boundary to the effective display area is the same as the distance from a straight line portion of the single-step structure 5 connected to the first boundary to the corresponding boundary of the effective display area, effectively ensuring that the alignment film completely covers the effective display area.

[0091] The alignment film also includes a second boundary arranged near the non-binding side, and the orthographic projection of the second boundary on the first substrate is located on the side of the orthographic projection of the frame-sealing glue on the first substrate away from the effective display area. In order to reduce the overlapping area between the alignment film and the frame-sealing glue at the corners, a double-step structure 4 is provided at two corners of the second boundary. The double-step structure 4 includes a first straight line edge, a second straight line edge, a third straight line edge and a fourth straight line edge connected in sequence. The first straight line edge is connected to the second boundary, and the orthographic projections of the second straight line edge and the third straight line edge on the first substrate are located within the orthographic projection of the frame-sealing glue on the first substrate, so that the alignment film partially overlaps with the frame-sealing glue at the two corners of the second boundary.

[0092] The second straight edge and the third straight edge are at the same distance from the corresponding boundaries of the effective display area, effectively ensuring that the alignment film completely covers the effective display area.

[0093] Exemplarily, the transfer plate includes a plurality of first transfer areas 1 arranged in an array, the plurality of first transfer areas 1 including a first sub-transfer area and a second sub-transfer area adjacently arranged in a direction perpendicular to the first side 12, and a second transfer area 2 is provided between the single-step structure 5 of the first sub-transfer area and the corresponding double-step structure 4 of the second sub-transfer area;

[0094] The alignment film further includes a second portion corresponding to the second transfer area 2 , and an orthographic projection of the second portion on the first substrate is located on one side of an orthographic projection of the frame sealant on the first substrate.

[0095] The provision of the second portion improves the uniformity of the alignment film on the first substrate and avoids support differences.

[0096] It should be noted that the orthographic projection of the second portion on the first substrate is located on one side of the orthographic projection of the frame-sealing adhesive on the first substrate, that is, the second portion does not overlap with the frame-sealing adhesive at all.

[0097] The following table is a comparison result of the anti-Drop capability of a substrate having an alignment film without the step structure described in this embodiment and the anti-Drop capability of a substrate having an alignment film with the step structure described in this embodiment.

[0098]

[0099] From the above table, we can see that when the height is the same and the test is conducted on a wooden board, the anti-Drop capability of the substrate without the alignment film of the step structure described in this embodiment is the same as the anti-Drop capability of the substrate with the alignment film of the step structure described in this embodiment, and both have 0NG in 12 products. However, when the test is conducted on marble, Figure 1 The middle alignment film is a complete rectangular structure, and 3 out of 12 products were NG. However, when the alignment film with the step structure in this embodiment was used, 1 out of 14 products was NG. The substrate with the alignment film with the step structure in this embodiment has a higher anti-Drop ability.

[0100] An embodiment of the present invention further provides a display device, comprising the above-mentioned display panel.

[0101] There are a few points to note:

[0102] (1) The drawings of the embodiments of the present disclosure only relate to the structures related to the embodiments of the present disclosure. Other structures may refer to conventional designs.

[0103] (2) For the sake of clarity, the thickness of layers or regions in the drawings used to describe the embodiments of the present disclosure are exaggerated or reduced, i.e., these drawings are not drawn to scale. It is understood that when an element such as a layer, film, region, or substrate is referred to as being "on" or "under" another element, the element may be "directly" "on" or "under" the other element or intervening elements may be present.

[0104] (3) In the absence of conflict, the embodiments of the present disclosure and the features therein may be combined with each other to form new embodiments.

[0105] It will be understood that the above embodiments are merely exemplary embodiments for illustrating the principles of the present invention, and the present invention is not limited thereto. Those skilled in the art will appreciate that various modifications and improvements can be made without departing from the spirit and substance of the present invention, and such modifications and improvements are also considered to be within the scope of protection of the present invention.

Claims

1. A transfer plate for transferring an alignment film onto a substrate to be transferred, characterized in that: The transfer plate includes a rectangular first transfer area, at least one corner of the first transfer area is concave to form a step structure, and the step structure includes adjacent straight line portions, which are parallel to corresponding sides of the first transfer area.

2. The transfer plate according to claim 1, wherein The first transfer area includes a first side corresponding to the binding side of the substrate to be transferred and a second side corresponding to the non-binding side of the substrate to be transferred, and the first side and the second side are arranged opposite to each other; At least one corner of the first side is concave to form a single-step structure, and at least one corner of the second side is concave to form a double-step structure.

3. The transfer plate according to claim 2, wherein: The transfer plate also includes a display corresponding area corresponding to the effective display area of ​​the substrate to be transferred; The single-step structure includes a first straight portion connected to the first side, and the first straight portion is arranged perpendicular to the first side; The distance between the first straight portion and the side corresponding to the display corresponding area is a first distance, the distance between the first side and the side corresponding to the display corresponding area is a second distance, and the first distance and the second distance are equal.

4. The transfer plate according to claim 2, wherein: The transfer plate also includes a display corresponding area corresponding to the effective display area of ​​the substrate to be transferred; The double-step structure includes a third straight portion, a fourth straight portion, and a fifth straight portion, wherein one end of the third straight portion is connected to the second side, the fourth straight portion is connected between the third straight portion and the fifth straight portion, the fourth straight portion is arranged parallel to the second side, and the fifth straight portion is arranged perpendicular to the second side; The distance between the fourth straight line portion and the side corresponding to the display corresponding area is a third distance, the distance between the fifth straight line portion and the side corresponding to the display corresponding area is a fourth distance, and the third distance and the fourth distance are equal.

5. The transfer plate according to claim 2, wherein: The transfer plate includes a plurality of first transfer areas arranged in an array, wherein the plurality of first transfer areas include a first sub-transfer area and a second sub-transfer area adjacent to each other in a direction perpendicular to the first side; A second transfer region is provided between the single-step structure of the first sub-transfer region and the corresponding double-step structure of the second sub-transfer region; There is a gap between the second transfer area and the first sub-transfer area and the second sub-transfer area.

6. The transfer plate according to claim 5, wherein: The second transfer area is in a cross shape, a circle or a square shape.

7. The transfer plate according to claim 5, wherein: The transfer plate includes at least one first area, the first area includes at least one first transfer area, and along the circumferential direction of the first area, the edge of the first area is surrounded by a third transfer area; The third transfer region is spaced apart from the first transfer region, and the third transfer region is spaced apart from the second transfer region.

8. The transfer plate according to claim 2, wherein: The transfer plate further includes a first corresponding area corresponding to the alignment mark on the substrate to be transferred, and the first corresponding area is located at the periphery of the single-step structure and / or the double-step structure.

9. The transfer plate according to claim 8, wherein A notch is provided in the middle area of ​​the first side and / or the second side, and the transfer plate further includes a second corresponding area corresponding to the alignment mark on the substrate to be transferred, and the second corresponding area is located at the notch.

10. A transfer device, characterized in that: The invention comprises the transfer plate according to any one of claims 1 to 9.

11. A display panel, characterized in that: The invention comprises a first substrate and a second substrate arranged opposite to each other, a liquid crystal layer between the first substrate and the second substrate, and a frame sealant encapsulating the liquid crystal layer, wherein the liquid crystal layer is sealed in a sealed space formed by the first substrate, the second substrate and the frame sealant; The display panel also includes an alignment film formed by transfer by the transfer device according to claim 10, and the alignment film is provided on the side of the first substrate and / or the second substrate close to the liquid crystal layer, and the orthographic projection of the alignment film on the first substrate partially overlaps with the orthographic projection of the sealing glue on the first substrate.

12. The display panel according to claim 11, wherein: The first substrate and the second substrate are both rectangular, the alignment film includes a first portion corresponding to the first transfer area on the transfer plate, and the shape of the first portion is a rectangle that matches the shape of the first substrate; The orthographic projection of the corner of the first part on the first substrate is located on one side of the orthographic projection of the frame sealing glue on the first substrate, or the orthographic projection of the corner of the first part on the first substrate partially overlaps with the orthographic projection of the frame sealing glue on the first substrate.

13. The display panel according to claim 11, wherein: The first transfer area on the transfer plate includes a first side edge corresponding to the binding side of the to-be-transferred substrate, the transfer plate includes a plurality of first transfer areas arranged in an array, the plurality of first transfer areas including a first sub-transfer area and a second sub-transfer area adjacently arranged in a direction perpendicular to the first side edge, and a second transfer area is provided between the single-step structure of the first sub-transfer area and the corresponding double-step structure of the second sub-transfer area; The alignment film further includes a second portion corresponding to the second transfer area, and an orthographic projection of the second portion on the first substrate is located on one side of an orthographic projection of the frame sealant on the first substrate.

14. A display device, characterized in that: The display panel comprises the display panel according to any one of claims 11 to 13.

Images