Display substrate, display panel, and frame adhesive coating method

Abstract

This invention provides a coating method for a display substrate, a display panel, and a bezel adhesive, belonging to the technical field of display devices. The display substrate includes a display area and a bezel adhesive coating area, which surrounds the display area. Grooves for accommodating the bezel adhesive are formed at the corners of the bezel adhesive coating area. A first guide groove and a second guide groove, arranged sequentially along the coating direction of the bezel adhesive, are connected to adjacent sides of the groove. The width of the first guide groove is different from the width of the groove, and the width of the second guide groove is smaller than the width of the groove. The display substrate provided by this invention can improve the uniformity of the bezel adhesive coating width, reduce the impact of coating speed variations in the bezel adhesive coating equipment on the bezel adhesive coating, and help ensure the sealing and stability requirements of narrow bezels.

Description

Technical Field

[0001] This invention relates to the field of technology, and more particularly to a method for applying adhesive to a display substrate, a display panel, and a bezel. Background Technology

[0002] The display panel is a thin-film transistor liquid crystal display (TFT-LCD).

[0003] One of the main components of a Crystal Display (TFT-LCD) is its color filter substrate, which typically includes: an array substrate and a color filter substrate positioned opposite each other; a sealant adhered between the array substrate and the color filter substrate; and liquid crystal filling the liquid crystal cell formed by the array substrate, the color filter substrate, and the sealant. The main function of the sealant is to seal the liquid crystal cell to prevent liquid crystal leakage or air from entering it. During the manufacturing of the display panel, a certain amount of liquid crystal is typically deposited onto the array substrate, a ring-shaped sealant is applied around the perimeter of the color filter substrate, and then the array substrate and the color filter substrate are precisely bonded together under vacuum.

[0004] However, when the frame adhesive coating equipment changes direction, the speed change of the frame adhesive coating will cause the frame adhesive to accumulate in the corner area, increase the width fluctuation of the frame adhesive, and cause the frame adhesive to overflow during the subsequent display panel lamination, increasing the product defect rate. In addition, the frame adhesive with large width fluctuation will increase the difficulty of cutting operations when laminating the display panel, and is also not conducive to the formation of narrow bezels. Summary of the Invention

[0005] In view of this, the purpose of the present invention is to provide a coating method for a display substrate, a display panel and a frame adhesive, so as to solve the problem of poor uniformity of the coating width of the frame adhesive mentioned in the prior art.

[0006] To achieve the above objectives, the present invention provides a display substrate, comprising:

[0007] The display area and the frame adhesive coating area are arranged around the display area, and the corner of the frame adhesive coating area is provided with a groove for accommodating the frame adhesive.

[0008] The groove is connected to a first guide groove and a second guide groove arranged sequentially along the coating direction of the frame adhesive on two adjacent sides, wherein the width of the first guide groove is different from the width of the groove, and the width of the second guide groove is smaller than the width of the groove.

[0009] Furthermore, a straight groove for accommodating the frame adhesive is provided in the straight position of the frame adhesive coating area. The straight groove includes a first straight groove connected to the first guide groove and a second straight groove connected to the second guide groove. The width of the first straight groove, the second straight groove and the trench are the same, and the width of the first guide groove is greater than the width of the trench.

[0010] Furthermore, the first guide groove includes a first guide section that is transitionally connected to the first straight groove, and a second guide section that is transitionally connected to the groove. The first guide section is configured to gradually expand in a direction close to the second guide section, and the second guide section is configured to gradually expand in a direction close to the first guide section.

[0011] Furthermore, the first guide groove also includes a third guide segment, which is connected to the first guide segment and the second guide segment respectively, and the width of any part of the third guide segment is greater than the width of the groove.

[0012] Furthermore, the second guide groove includes a first guide portion that transitions to the second straight groove, and a second guide portion that transitions to the groove. The first guide portion is configured to taper in a direction close to the second guide portion, and the second guide portion is configured to taper in a direction close to the first guide portion.

[0013] Furthermore, the second guide groove also includes a third guide portion, which is connected to both the first guide portion and the second guide portion, and the width of any portion of the third guide portion is less than the width of the groove.

[0014] Furthermore, the orthographic projection of the first guide groove and / or the second guide groove onto the display substrate is a central axis symmetrical pattern.

[0015] Furthermore, a straight groove for accommodating the frame adhesive is provided in the straight position of the frame adhesive coating area. The straight groove includes a first straight groove connected to the first guide groove and a second straight groove connected to the second guide groove. The width of the first straight groove and the width of the second straight groove are both smaller than the width of the trench, and the width of the first guide groove is smaller than the width of the trench.

[0016] Furthermore, the first guide groove is configured to taper in a direction close to the first straight groove, and the second guide groove is configured to taper in a direction close to the second straight groove.

[0017] Furthermore, the length of the first guide groove is negatively correlated with the adhesive coating speed of the groove, and the length of the second guide groove is positively correlated with the adhesive coating speed of the straight groove.

[0018] Furthermore, the length of the first guide groove is 15-35mm, and the length of the second guide groove is 15-35mm.

[0019] Based on the same inventive concept, this application also provides a display panel, including a display substrate as described in any of the preceding claims, and a mating substrate, wherein the mating substrate and the display substrate are bonded and encapsulated by frame adhesive.

[0020] Based on the same inventive concept, this application also provides a method for applying frame adhesive, suitable for applying frame adhesive to a display substrate as described in any of the preceding claims, the method comprising:

[0021] The coating direction is determined based on the first guide groove and the second guide groove;

[0022] The frame adhesive is applied in the frame adhesive application area corresponding to the first guide groove at a first average speed, and in the frame adhesive application area corresponding to the second guide groove at a second average speed, wherein the first average speed and the second average speed are different.

[0023] Furthermore, the method includes:

[0024] The frame adhesive is applied in the frame adhesive application area corresponding to the first guide groove according to the first preset parameters, and in the frame adhesive application area corresponding to the groove according to the preset speed. The frame adhesive is applied in the frame adhesive application area corresponding to the second guide groove according to the second preset parameters, so that the frame adhesive width in the frame adhesive application area is the same.

[0025] The first preset parameter and / or the second preset parameter include coating speed, coating gap and adhesive injection volume.

[0026] Furthermore, the method includes:

[0027] The frame adhesive is applied in the frame adhesive application area corresponding to the first guide groove at a first preset acceleration, and in the frame adhesive application area corresponding to the groove at a preset speed. The frame adhesive is applied in the frame adhesive application area corresponding to the second guide groove at a second preset acceleration, so that the frame adhesive width in the frame adhesive application area is the same.

[0028] Wherein, the first preset acceleration and the second preset acceleration are accelerations that are opposite in direction and the same in magnitude.

[0029] As can be seen from the above, the display substrate provided by the present invention, by setting a groove at the corner of the frame adhesive coating area, allows residual and redundant frame adhesive to flow into the groove when the frame adhesive coating equipment decelerates at the corner, thus avoiding the accumulation of residual frame adhesive at the corner during the frame adhesive coating process, thereby preventing the frame adhesive from falling off later and affecting the display experience.

[0030] In addition, when the speed or amount of adhesive applied by the frame adhesive coating equipment changes near the corner, the first and second guide grooves can effectively ensure that the frame adhesive of different variables is at the same width, effectively improving the uniformity of the width of the frame adhesive coating, reducing the impact of the coating speed change of the frame adhesive coating equipment on the width fluctuation of the frame adhesive coating, and helping to ensure the sealing and stability requirements of narrow frame. Attached Figure Description

[0031] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0032] Figure 1 This is a schematic diagram of the region division of the display substrate in an embodiment of the present invention;

[0033] Figure 2 This is a cross-sectional view of the mating of the display substrate and the mating substrate in an embodiment of the present invention;

[0034] Figure 3 This is a schematic diagram of the display substrate structure in an embodiment of the present invention;

[0035] Figure 4 for Figure 3 Enlarged view of section A in the middle;

[0036] Figure 5 for Figure 3 A schematic diagram of another embodiment of part A of the display substrate;

[0037] Figure 6 for Figure 3 A schematic diagram of another embodiment of part A of the display substrate;

[0038] Figure 7 This is a schematic diagram of another embodiment of the display substrate in this invention;

[0039] Figure 8 for Figure 7 Enlarged view of section B in the middle;

[0040] Figure 9This is a schematic diagram of another embodiment of the display substrate in this invention.

[0041] Explanation of reference numerals in the attached figures

[0042] 1. Display substrate; 11. Substrate; 12. Planarization layer; 13. Display area; 14. Frame adhesive coating area;

[0043] 2. Trench;

[0044] 3. First guide groove; 31. First guide section; 32. Second guide section; 33. Third guide section;

[0045] 4. Second guide groove; 41. First guide section; 42. Second guide section; 43. Third guide section;

[0046] 5. First straight groove; 6. Second straight groove;

[0047] 7. Connecting substrate. Detailed Implementation

[0048] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with specific embodiments and with reference to the accompanying drawings.

[0049] It should be noted that, unless otherwise defined, the technical or scientific terms used in the embodiments of this invention should have the ordinary meaning understood by one of ordinary skill in the art to which this disclosure pertains. The terms "first," "second," and similar terms used in this disclosure do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0050] In related technologies, because the frame adhesive coating equipment moves at a constant speed in the straight line, when approaching a corner, the speed of the equipment entering the corner must be lower than the speed in the straight line to ensure sufficient coverage of the frame adhesive. Affected by factors such as speed and adhesive volume, the width of the frame adhesive coating fluctuates significantly. Taking the Musashi frame adhesive coating equipment as an example, in actual frame adhesive application, the uniformity of the corner width is approximately 15%. This significant fluctuation in frame adhesive width can lead to adhesive overflow during subsequent display panel lamination, increasing the product defect rate. Furthermore, the large width fluctuation and poor uniformity of the adhesive can also result in wider areas of adhesive during display panel lamination, increasing the operational risks of subsequent cutting processes and hindering the formation of narrow bezels.

[0051] The following description, in conjunction with the accompanying drawings, illustrates the proposed solution.

[0052] like Figure 1 As shown, one or more embodiments of this application provide a display substrate 1, which includes a display area 13 and a frame adhesive coating area 14 disposed around the display area 13. The frame adhesive coating area 14 is used to apply frame adhesive so as to glue the display substrate 1 to the mating substrate 7 to form a box. Here, the display substrate 1 described in this application can be an array substrate or a color filter substrate.

[0053] like Figure 3 As shown, in the display substrate 1 of this application, a groove 2 for accommodating the frame adhesive is provided at the corner of the frame adhesive coating area 14; a first guide groove 3 and a second guide groove 4 are respectively connected to the adjacent two sides of the groove 2, arranged sequentially along the coating direction of the frame adhesive, wherein the width of the first guide groove 3 is different from the width of the groove 2, and the width of the second guide groove 4 is smaller than the width of the groove 2.

[0054] As can be seen from the above description, the display substrate 1 provided by the present invention provides a groove 2 at the corner of the frame adhesive coating area 14. When the frame adhesive coating equipment decelerates at the corner, the residual and redundant frame adhesive can flow into the groove 2, which avoids the accumulation of residual frame adhesive generated during the frame adhesive coating process at the corner, thereby avoiding the frame adhesive from falling off later and affecting the display experience.

[0055] In addition, when the speed or amount of adhesive applied by the frame adhesive coating equipment changes near the corner, the first guide groove 3 and the second guide groove 4 can effectively ensure that the frame adhesive of different variables is at the same width, effectively improving the uniformity of the width of the frame adhesive coating, reducing the impact of the coating speed change of the frame adhesive coating equipment on the width fluctuation of the frame adhesive coating, and helping to ensure the sealing and stability requirements of the narrow frame.

[0056] In some embodiments, since the display screen is generally rectangular, such as computer screens, mobile phone screens, or tablet screens, the frame adhesive coating area 14 of the display substrate 1 is generally rectangular. To ensure that the liquid crystal can fully cover the display area 13, the frame adhesive coating area 14 does not directly contact the display area 13, and the portion between the display area 13 and the frame adhesive coating area 14 is also filled with liquid crystal. Furthermore, since the display area 13 is generally rectangular, creating grooves 2 at the corners of the frame adhesive coating area 14 facilitates the filling of liquid crystal, ensuring that sufficient liquid crystal diffuses to the corners and preventing air bubbles from forming at the corners of the display panel, thus affecting the product defect rate. Of course, this embodiment only illustrates the shape of the display screen; other irregularly shaped screens are also possible. When the display screen is an irregularly shaped screen, the grooves 2 are located at the corners of that irregularly shaped screen.

[0057] like Figure 2 As shown, in some embodiments, the display substrate 1 is generally provided with multiple film layers such as a substrate 11 and a metal wiring layer. The trenches 2, guide trenches, and straight trenches mentioned in the embodiments of this application can all be formed by etching away a portion of a specific film layer on the display substrate 1, or by removing multiple film layers at the corresponding positions to form trenches. For example, the planarization layer 12 of the display substrate 1 can be etched at the corresponding position to form trenches. An alignment film layer (not shown in the figure) is also provided on the side of the planarization layer 12 facing the liquid crystal layer. However, since the planarization layer 12 on the color filter substrate is generally thicker and the alignment film layer is thinner, it can be ignored. When a portion of the thin film at the corner of the planarization layer 12 is removed, a trench 2 with a relatively obvious depth can be finally formed on the side of the display substrate 1 facing the liquid crystal layer.

[0058] Figure 3 The direction of the middle arrow indicates the direction of the frame adhesive coating. That is, the frame adhesive coating equipment first enters the groove 2 through the straight groove and the first guide groove 3, and then enters the straight groove through the groove 2 and the second guide groove 4. This direction will be used to describe the following embodiments.

[0059] In some embodiments, a straight groove for accommodating the adhesive is formed in the straight section of the frame adhesive coating area 14. The straight groove includes a first straight groove 5 connected to the first guide groove 3 and a second straight groove 6 connected to the second guide groove 4. The widths of the first straight groove 5, the second straight groove 6, and the groove 2 are the same, and the width of the first guide groove 3 is greater than the width of the groove 2. Here, the corner position of the frame adhesive coating area 14 refers to the position where the frame adhesive coating equipment performs a corner operation, and the straight position of the frame adhesive coating area 14 refers to the position where the frame adhesive coating equipment performs a straight coating operation. Here, both the first guide groove 3 and the second guide groove 4 are located in the straight position of the frame adhesive coating area 14.

[0060] In the above embodiments, when the display substrate 1 is rectangular, the groove 2 and the straight groove together form an annular groove surrounding the display area 13 along with the frame adhesive coating area 14. In the actual frame adhesive coating process, the frame adhesive in the straight coating process will also have a certain width variation fluctuation. Here, setting the straight groove to accommodate the frame adhesive in the straight coating can further ensure the uniform coating of the straight area, thereby improving the overall coating width uniformity.

[0061] In addition, by Figure 2 It can also be seen that the actual width of the adhesive coating area 14 must cover and exceed the groove 2 and the straight groove. The overall design principle is: during the actual coating process, the greater the redundancy of the adhesive, the wider the corresponding groove width on the lower side, ensuring that the adhesive width of the adhesive coating area 14 remains at the same width while accommodating the redundant adhesive. Here, the adhesive is divided into adhesive m in the groove 2 and the straight groove, and adhesive n above the planarization layer 12. After curing, adhesive m and adhesive n form a step with the planarization layer 12 of the display substrate 1, which helps to further improve the adhesive strength of the adhesive and ensure the connection strength of the adhesive to the display substrate 1 and the mating substrate 7.

[0062] For example, the following describes a corner location and its adjacent straight location in the adhesive coating area 14.

[0063] like Figure 4 As shown, the first guide groove 3 includes a first guide section 31 that transitions to the first straight groove 5, and a second guide section 32 that transitions to the groove 2. The first guide section 31 is configured to gradually expand in a direction close to the second guide section 32; the second guide section 32 is configured to gradually expand in a direction close to the first guide section 31. Here, the first guide groove 3 is a guide groove for the frame adhesive coating equipment as it enters a corner. The function of this guide groove is to adapt to the deceleration or changes in the amount of frame adhesive when the frame adhesive coating equipment enters the corner position, so as to ensure the uniformity of the width of the overall coating area by the frame adhesive coating equipment.

[0064] In the above embodiments, when the frame adhesive coating equipment enters the first guide section 31 of the first guide groove 3 from the first straight groove 5, since the first guide section 31 is set to gradually expand in width, the excess frame adhesive can be accommodated in the first guide section 31 when the speed of the frame adhesive coating equipment slows down, ensuring the uniformity of the width of this section with the straight position; when the frame adhesive coating equipment enters the second guide section 32 from the first guide section 31, since the second guide section 32 is set to gradually shrink in width, the frame adhesive coating equipment can adjust the GAP value (coating gap) or change the rotation speed to adjust the frame adhesive injection amount to reduce the frame adhesive injection. At this time, since the speed of the frame adhesive coating equipment has slowed down, when the frame adhesive coating equipment actually enters the groove 2 at the corner position, there will be no frame adhesive overflow causing width fluctuation, ensuring the frame adhesive coating effect at the corner position.

[0065] like Figure 5 As shown, in some embodiments, the first guide groove 3 further includes a third guide segment 33, which is connected to the first guide segment 31 and the second guide segment 32 respectively. The width of any part of the third guide segment 33 is greater than the width of the groove 2. For example, the orthographic projection of one wall of the third guide segment 33 onto the display substrate 1 can be an arc, a straight line, or a combination of both, as long as the width of the third guide segment 33 is greater than the width of the groove 2. The third guide segment 33 can extend the overall length of the first guide groove 3. Increasing the overall length of the first guide groove 3 improves the coating stability of the frame adhesive coating equipment, enabling the frame adhesive coating equipment to more smoothly and accurately transition corner positions, ensuring the uniformity of the overall frame adhesive width. Here, the frame adhesive coating equipment operates at a constant speed on the third guide segment 33.

[0066] Furthermore, the orthographic projection of the first guide groove 3 onto the display substrate 1 is a centrally symmetrical shape, and the axis of symmetry of the first guide groove 3 is the central axis where the first vertical groove 5 is located. For example, as shown... Figure 6 As shown, the orthographic projection of the first guide groove 3 on the display substrate 1 can be a rhombus; Figure 4 In the middle, the orthographic projection of the first guide groove 3 on the display substrate 1 is an ellipse; Figure 5 In this design, the orthographic projection of the first guide groove 3 onto the display substrate 1 is an axisymmetric hexagon. Using a centrally axisymmetric shape ensures uniform application of the frame adhesive by the frame adhesive coating equipment, thereby improving the width uniformity of the frame adhesive coating.

[0067] It should be noted that, in the above embodiments, since the first guide groove 3 is connected to both the groove 2 and the first vertical groove 5, the orthographic projection of the first guide groove 3 on the display substrate 1 refers to the shape of the first guide groove 3 ignoring the groove width and the respective connecting cross-sectional lines; furthermore, the connecting cross-sectional line between the first guide groove 3 and the first vertical groove 5 is perpendicular to the central axis of the first vertical groove 5, so as to... Figure 4 As shown in the figure, dashed line a is the central axis of the first straight groove 5, dashed line b is actually the connection section line between the first guide groove 3 and the first straight groove 5, and dashed line c is the connection section line between the first guide groove 3 and the support of the groove 2. Figure 5 The orthographic projection of the first guide groove 3 on the display substrate 1 is an axisymmetric hexagon. Similarly, when considering the connecting section line of the first guide groove 3, the orthographic projection of the first guide groove 3 on the display substrate 1 in the figure is an axisymmetric octagon.

[0068] like Figure 4As shown, in some embodiments, the second guide groove 4 includes a first guide portion 41 that is transitionally connected to the second straight groove 6, and a second guide portion 42 that is transitionally connected to the groove 2. The first guide portion 41 is configured to taper in a direction close to the second guide portion 42; the second guide portion 42 is configured to taper in a direction close to the first guide portion 41.

[0069] In addition, such as Figure 5 As shown, the second guide groove 4 also includes a third guide portion 43, which is connected to the first guide portion 41 and the second guide portion 42 respectively. The width of any part of the third guide portion 43 is less than the width of the groove 2. For example, the orthographic projection of one wall of the third guide portion 43 onto the display substrate 1 can be a straight line, an arc, or a wavy line, as long as the width of the third guide portion 43 is less than the width of the groove 2. The third guide portion 43 can extend the overall length of the second guide groove 4. Increasing the overall length of the second guide groove 4 improves the coating stability of the frame adhesive coating equipment, allowing the frame adhesive coating equipment to transition more smoothly and accurately to the second straight groove 6, ensuring the uniformity of the overall frame adhesive width. Here, the frame adhesive coating equipment operates at a constant speed on the third guide portion 43.

[0070] Here, when the frame adhesive coating equipment enters the second guide section 42 of the second guide groove 4 from the groove 2, since the width of the groove 2 is the same as the width of the first straight groove 5 and the second straight groove 6, and the second guide section 42 is set with a gradually narrowing width, the overall width of the second guide groove 4 is smaller than the width of the groove. If only the coating speed of the frame adhesive coating equipment is adjusted, the frame adhesive width of the second guide groove 4 located in the speed change area will be too small, affecting the normal sealing effect of this section. Therefore, the frame adhesive coating equipment can increase the frame adhesive injection by adjusting the GAP value (coating gap) and changing the rotation speed, while adjusting and accelerating the coating speed so that the coating speed when entering the second straight groove 6 is the same as the speed of the first straight groove 5. The narrowing second guide groove 4 makes the frame adhesive width in the second guide groove 4 the same as the frame adhesive width in the groove 2 and the straight groove. Furthermore, the frame adhesive will not be too thin when the frame adhesive coating equipment enters the second straight groove 6, thereby ensuring the uniformity of the overall width.

[0071] Still Figure 4 and Figure 5As shown, the orthographic projection of the second guide groove 4 onto the display substrate 1 is also a central axis symmetrical shape, with the axis of symmetry of the second guide groove being the central axis where the second straight groove 6 is located. Here, the two opposite side walls of the second guide groove 4 can be flat plates, arc shapes, or a combination of both. Using a central axis symmetrical shape ensures uniform application of the frame adhesive by the frame adhesive coating equipment, thereby improving the width uniformity of the frame adhesive coating. Here, the orthographic projection shapes of the first guide groove 3 and the second guide groove 4 on adjacent sides of the same groove 2 onto the display substrate 1 can be combined.

[0072] It should be noted that, in this embodiment, the maximum width of the first guide groove 3 is 1.15-1.5 times the width of the groove 2. For example, the maximum width of the first guide groove 3 is 1.15 times the width of the groove 2. Naturally, the maximum width of the first guide groove 3 is also the width of the first guide segment 31 and the second guide segment 32 at their maximum outward expansion position. When the first guide groove 3 has a third guide segment 33, the maximum width of the first guide groove 3 is also the width of the third guide segment 33. The maximum width of the second guide groove 4 is 0.8-0.9 times the width of the groove 2. For example, the minimum width of the second guide groove 4 is 0.9 times the width of the groove 2. Here, the minimum width of the second guide groove 4 is also the width of the first guide portion 41 and the second guide portion 42 at their narrowest contraction position. When the second guide groove 4 has a third guide portion 43, the maximum width of the second guide groove 4 is also the width of the third guide portion 43.

[0073] In some embodiments, such as Figure 6 As shown, the minimum width of the second guide groove 4 can be 0. When the minimum width of the second guide groove 4 is 0, the opposite ends of the first guide part 41 and the second guide part 42 gradually shrink to a width of 0.

[0074] In some embodiments, such as Figure 7 As shown, the straight groove includes a first straight groove 5 connected to the first guide groove 3 and a second straight groove 6 connected to the second guide groove 4. The width of the first straight groove 5 and the width of the second straight groove 6 are both smaller than the width of the groove 2, and the width of the first guide groove 3 is smaller than the width of the groove 2.

[0075] Here, as Figure 8As shown, the first guide groove 3 is configured to taper towards the first straight groove 5, and the second guide groove 4 is configured to taper towards the second straight groove 6. When the connection line between the first guide groove 3 and the first straight groove 5 is perpendicular to the central axis of the first straight groove 5, the orthographic projection of the first guide groove 3 on the display substrate 1 is an isosceles trapezoid, and the width of the isosceles trapezoid near the first straight groove 5 is smaller than the width near the groove 2. Similarly, when the connection line between the second guide groove 4 and the second straight groove 6 is perpendicular to the central axis of the second straight groove 6, the orthographic projection of the second guide groove 4 on the display substrate 1 is an isosceles trapezoid, and the width of the isosceles trapezoid near the second straight groove 6 is smaller than the width near the groove 2.

[0076] Here, the width of the straight groove is smaller than the width of the trench 2, and the trench 2 gradually narrows towards the first straight groove 5 through the first guide groove 3, and gradually narrows towards the second straight groove 6 through the second guide groove 4. The above setting only requires adjusting the coating speed of the frame adhesive coating equipment. When the frame adhesive 5 enters the trench 2 through the first guide groove 3, the coating speed changes from uniform speed to uniform deceleration to uniform speed. When the frame adhesive 2 enters the second straight groove 6 through the second guide groove 4, the coating speed changes from uniform speed to uniform acceleration to uniform speed. This eliminates the need to adjust and operate other parameters of the frame adhesive coating equipment, effectively improving the frame adhesive coating efficiency and enhancing the coating performance of the coating equipment.

[0077] In the above embodiments, the length of the first guide groove 3 is negatively correlated with the adhesive coating speed of the groove 2, and the length of the second guide groove 4 is positively correlated with the adhesive coating speed of the straight groove. The longer the first guide groove 3, the slower the adhesive coating speed in the groove 2, the smaller the adhesive fluctuation from the first straight groove 5 to the groove 2, and the better the stability of the adhesive coating. The longer the second guide groove 4, the faster the adhesive coating speed in the second straight groove 6, the smaller the width fluctuation from the groove 2 to the second straight groove 6, and the better the stability of the adhesive coating.

[0078] As can be seen from the above description, when the width of groove 2 is greater than the width of the straight groove, the speeds of the first straight groove 5 and the second straight groove 6 are the same. The coating of the frame adhesive in the first straight groove 5, the second straight groove 6, and groove 2 is all uniform. The coating of the frame adhesive in the first guide groove 3 is uniformly decelerated, and the coating of the frame adhesive in the second guide groove 4 is uniformly accelerated. The coating speed of the frame adhesive in groove 2 is less than the speeds of the first straight groove 5 and the second straight groove 6.

[0079] In some embodiments, the length of the first guide groove 3 is 15-35mm, for example, the length of the first guide groove 3 is 15mm, 20mm or 35mm; the length of the second guide groove 4 is 15-35mm, for example, the length of the second guide groove 4 is 15mm, 20mm or 35mm. Preferably, the length of the first guide groove 3 is the same as the length of the second guide groove 4. This arrangement facilitates adjustment of the coating speed of the coating equipment and ensures a uniform distribution of the frame adhesive.

[0080] In addition, it should be noted that, as Figure 9 As shown, in some embodiments, when the width of the groove 2 is greater than the width of the straight groove, the straight groove portion can be omitted, that is, the first straight groove 5 and the second straight groove 6 are not provided, and the corner transition action of the frame adhesive coating is completed only through the first guide groove 3-groove 2-second guide groove 4. When the straight groove is omitted, since the coating speed of the frame adhesive coating equipment in the straight position is uniform, the actual straight position of the frame adhesive coating area 14 is still a uniform straight frame adhesive application.

[0081] Based on the same inventive concept, this application also provides a display panel, including a display substrate 1 as described in any of the preceding claims, and a mating substrate 7, wherein the mating substrate 7 and the display substrate 1 are bonded and encapsulated by frame adhesive.

[0082] It should be noted that the display substrate 1 in this application can be an array substrate or a color filter substrate, and correspondingly, the docking substrate 7 is a color filter substrate for docking with the array substrate, or an array substrate for docking with the color filter substrate.

[0083] Based on the same inventive concept, this application also provides a method for applying frame adhesive, applicable to applying frame adhesive to the display substrate 1 as described in any of the preceding embodiments, the method comprising:

[0084] Step 100: Determine the coating direction based on the first guide groove 3 and the second guide groove 4.

[0085] In step 100, generally, the initial position for applying the frame adhesive is a straight line position in the frame adhesive application area 14. The frame adhesive application equipment first enters the first guide groove 3 through the straight line position, then enters the groove 2 after passing through the first guide groove 3, and then enters the straight line position again after passing through the groove 2 and the second guide groove 4 in sequence to complete the corner coating operation.

[0086] Step 200: Apply frame adhesive to the first guide groove 3 at a first average speed, and apply frame adhesive to the second guide groove 4 at a second average speed. The first average speed and the second average speed are different.

[0087] The display area 13 has a straight groove for accommodating the frame adhesive at its edge. The straight groove includes a first straight groove 5 and a second straight groove 6 located on the two adjacent sides of the groove 2. The first straight groove 5 is connected to the first guide groove 3, and the second straight groove 6 is connected to the second guide groove 4. The width of the straight groove is smaller than the width of the groove 2.

[0088] The above step 200 specifically includes:

[0089] The frame adhesive is applied in the first straight groove 5 at a first preset speed, in the first guide groove 3 at a first preset acceleration, in the groove 2 at a second preset speed, in the second guide groove 4 at a second preset acceleration, and in the second straight groove 6 at a first preset speed.

[0090] Wherein, the first preset speed is greater than the second preset speed, and the first preset acceleration and the second preset acceleration are accelerations in opposite directions but of the same magnitude.

[0091] Here, the coating speed of the frame adhesive coating equipment can be adjusted, eliminating the need to adjust related parameters such as the rotation speed of the frame adhesive coating equipment, the amount of frame adhesive dispensed, or the coating gap. This simplifies the coating process and helps to improve coating efficiency while ensuring uniform coating of the frame adhesive.

[0092] In some embodiments, step 200 above may also be:

[0093] The frame adhesive is applied in the frame adhesive application area corresponding to the first guide groove 3 according to the first preset parameters, applied in the frame adhesive application area corresponding to the groove 2 according to the preset speed, and applied in the frame adhesive application area corresponding to the second guide groove 4 according to the second preset parameters, so that the frame adhesive width in the frame adhesive application area is the same.

[0094] The first preset parameter and / or the second preset parameter include coating speed, coating gap and adhesive injection volume.

[0095] For example, with Figure 4 For example, the frame adhesive coating equipment moves at a constant speed on the first straight groove 5. When it reaches the first guide section 31 of the first guide groove 3, the coating speed is reduced. After passing through the first guide section 31, when it enters the second guide section 32, the amount of frame adhesive injected is reduced by adjusting the coating gap or the rotation speed until the coating groove 2 is coated. Subsequently, when it enters the second guide groove 4, the coating speed is increased and the coating gap or the rotation speed is adjusted to increase the amount of frame adhesive injected until it is coated to the second straight groove 6 and then it continues to move at a constant speed.

[0096] Here, since the width of the groove is the same as the width of the straight groove, the method of adjusting the coating frame adhesive by combining multiple parameters can further reduce the width of the groove at the corner, which is conducive to achieving a narrow frame design; at the same time, adjusting the coating frame adhesive by combining multiple parameters can also improve the accuracy of adjusting the adhesive width and ensure the uniformity of the adhesive width.

[0097] Those skilled in the art should understand that the discussion of any of the above embodiments is merely exemplary and is not intended to imply that the scope of this disclosure (including the claims) is limited to these examples; within the framework of this invention, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of the different aspects of the invention as described above, which are not provided in the details for the sake of brevity.

[0098] The embodiments of this invention are intended to cover all such substitutions, modifications, and variations falling within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this invention should be included within the scope of protection of this invention.

Claims

1. A display substrate, characterized in that, include: The display area and the frame adhesive coating area are arranged around the display area, and the corner of the frame adhesive coating area is provided with a groove for accommodating the frame adhesive. The groove is connected to a first guide groove and a second guide groove arranged sequentially along the coating direction of the frame adhesive on two adjacent sides, wherein the width of the first guide groove is different from the width of the groove, and the width of the second guide groove is smaller than the width of the groove. A straight groove for accommodating the frame adhesive is provided in the straight position of the frame adhesive application area. The straight groove includes a first straight groove connected to the first guide groove and a second straight groove connected to the second guide groove. The width of the first straight groove, the second straight groove and the trench are the same, and the width of the first guide groove is greater than the width of the trench.

2. The display substrate according to claim 1, characterized in that, The first guide groove includes a first guide section that is transitionally connected to the first straight groove, and a second guide section that is transitionally connected to the groove. The first guide section is configured to gradually expand in a direction close to the second guide section, and the second guide section is configured to gradually expand in a direction close to the first guide section.

3. The display substrate according to claim 2, characterized in that, The first guide groove further includes a third guide segment, which is connected to the first guide segment and the second guide segment respectively, and the width of any part of the third guide segment is greater than the width of the groove.

4. The display substrate according to claim 1, characterized in that, The second guide groove includes a first guide portion that transitions to the second straight groove and a second guide portion that transitions to the groove. The first guide portion is configured to taper in a direction close to the second guide portion, and the second guide portion is configured to taper in a direction close to the first guide portion.

5. The display substrate according to claim 4, characterized in that, The second guide groove also includes a third guide portion, which is connected to the first guide portion and the second guide portion respectively, and the width of any part of the third guide portion is smaller than the width of the groove.

6. The display substrate according to any one of claims 1 to 5, characterized in that, The orthographic projection of the first guide groove and / or the second guide groove onto the display substrate is a central axis symmetrical figure.

7. The display substrate according to claim 1, characterized in that, The length of the first guide groove is 15-35mm, and the length of the second guide groove is 15-35mm.

8. A display panel, characterized in that, The display substrate includes any one of claims 1 to 7, and further includes a mating substrate, wherein the mating substrate and the display substrate are bonded and encapsulated by frame adhesive.

9. A method for applying a border adhesive, characterized in that, Suitable for applying frame adhesive to the display substrate according to any one of claims 1 to 7, the method comprising: The coating direction is determined based on the first guide groove and the second guide groove; Frame adhesive is applied in the frame adhesive application area corresponding to the first guide groove at a first average speed, and frame adhesive is applied in the frame adhesive application area corresponding to the second guide groove at a second average speed. The frame adhesive coating equipment moves at a constant speed in the first straight groove. When it reaches the first guide section of the first guide groove, it reduces the coating speed and decreases the amount of frame adhesive injected by adjusting the coating gap or rotation speed until the groove is coated. When it enters the second guide groove, it increases the coating speed and adjusts the coating gap or rotation speed to increase the amount of frame adhesive injected until it is coated into the second straight groove and then continues to move at a constant speed.

10. The method for applying the edge adhesive according to claim 9, characterized in that, The method includes: The frame adhesive is applied in the frame adhesive application area corresponding to the first guide groove according to the first preset parameters, and in the frame adhesive application area corresponding to the groove according to the preset speed. The frame adhesive is applied in the frame adhesive application area corresponding to the second guide groove according to the second preset parameters, so that the frame adhesive width in the frame adhesive application area is the same. The first preset parameter and / or the second preset parameter include coating speed, coating gap and adhesive injection volume.

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