Display panel and display device

Abstract

The embodiment of the invention provides a display panel and a display device. According to the display panel, the first groove is formed in the non-pixel area of the insulating layer, the black matrix layer is arranged in the first groove, the second groove is formed in the side, away from the insulating layer, of the black matrix layer, and the color resistance layer is arranged in the second groove, so that when the color resistance is formed, even if the color resistance overflows, the color resistance can overflow into the second groove, and the color resistance is prevented from overflowing. Therefore, the risk that color mixing occurs when the color resistors are formed through ink-jet printing is reduced, the thickness of the black matrix layer does not need to be reduced, the reflectivity of the display panel is prevented from being increased, and the risk that the ink forming one color resistor overflows to the setting areas of the other color resistors is low, so that the display effect is improved. The selection range of the contact angle between the color resistor and the black matrix layer is wide, the development difficulty of a color resistor material is reduced, the middle area of the color resistor is prevented from protruding too high, and the optical performance of the display panel is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of display, in particular to a display panel and a display device. BACKGROUND

[0002] OLED (Organic Light-Emitting Diode) display devices are widely used due to their self-luminous, wide color gamut, low power consumption, and flexible display. In order to solve the problem of large thickness of the polarizing plate, the existing OLED display device absorbs the emitted light of the OLED display device, resulting in low light efficiency and high power consumption. A Pol Less Panel (PLP) technology is proposed, which replaces the polarizing plate with a black matrix and color resistance to reduce external reflected light and improve the light transmittance of the OLED display device. In order to reduce the cost, the color resistance is formed by inkjet printing, but the black matrix still uses photolithography technology, so the thickness of the black matrix is small. When the color resistance is formed by inkjet printing later, it is easy to cause color resistance overflow and color mixing, which further leads to display abnormalities.

[0003] Therefore, the existing OLED display device has the technical problem of inkjet printing color resistance overflow to other color resistance areas causing color mixing and display abnormalities. SUMMARY

[0004] The embodiments of the present application provide a display panel and a display device to solve the technical problem of inkjet printing color resistance overflow to other color resistance areas causing color mixing and display abnormalities in the existing OLED display device.

[0005] In order to achieve the above-mentioned purpose, according to the first aspect of the present application, a display panel is provided, the display panel comprises a display area, the display area comprises a pixel area and a non-pixel area, and the display panel comprises: a substrate; an insulating layer disposed on one side of the substrate, the insulating layer being provided with a first groove in the non-pixel area; a black matrix layer disposed on the side of the insulating layer away from the substrate, the black matrix layer comprising an opening disposed in the pixel area; a color resistance layer disposed on the side of the black matrix layer away from the substrate, a part of the color resistance layer being disposed in the opening; wherein the black matrix layer is disposed in the first groove and is provided with a second groove on the side away from the insulating layer, and another part of the color resistance layer is also disposed in the second groove.

[0006] According to the second aspect of the present application, a display device is provided, which comprises the display panel according to any one of the above-mentioned embodiments.

[0007] This application provides a display panel and a display device. The display panel has a first groove in the non-pixel area of ​​the insulating layer, a black matrix layer disposed in the first groove and a second groove on the side away from the insulating layer, and a color resist layer disposed in the second groove. This allows the color resist to overflow into the second groove during its formation, even if overflow occurs, instead of overflowing into other color resist areas. This reduces the risk of color mixing during inkjet printing, eliminates the need to reduce the thickness of the black matrix layer, avoids increasing the reflectivity of the display panel, and lowers the risk of ink overflowing into other color resist areas. Furthermore, the contact angle between the color resist and the black matrix layer has a wider range of options, reducing the difficulty of developing color resist materials. It also avoids excessive bulging in the middle area of ​​the color resist, thus improving the optical performance of the display panel.

[0008] Other features and advantages of this application will be described in detail in the following detailed description section. Attached Figure Description To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0009] To gain a more complete understanding of this application and its beneficial effects, the following description will be provided in conjunction with the accompanying drawings, wherein the same reference numerals in the following description denote the same parts.

[0010] Figure 1 This is a schematic diagram of a comparison display device provided in an embodiment of this application.

[0011] Figure 2 A plan view of the display panel provided in an embodiment of this application.

[0012] Figure 3 The diagram shows a plan view of the black matrix layer and a stacked diagram of the black matrix layer and the color resist layer provided in the embodiments of this application.

[0013] Figure 4 This is a first cross-sectional schematic diagram of a display panel provided in an embodiment of this application.

[0014] Figure 5 This is a second cross-sectional schematic diagram of the display panel provided in an embodiment of this application.

[0015] Figure 6 This is a third cross-sectional schematic diagram of the display panel provided in an embodiment of this application.

[0016] Figure 7This is a fourth cross-sectional schematic diagram of the display panel provided in an embodiment of this application. Detailed Implementation

[0017] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the protection scope of this application.

[0018] To illustrate the principle behind the technical problems addressed in the embodiments of this application, some comparative display devices are provided. It should be understood that these comparative display devices are not considered prior art in the embodiments of this application. Figure 1 As shown, the contrast display device includes a substrate 11, a black matrix 12, a red color resist 131, a green color resist 132, a blue color resist 133, and a planarization film 14. In order to reduce costs during the formation of the contrast display device, as shown... Figure 1 As shown, ink is sprayed onto the substrate 11 using a printhead 15 to form various color resists, while the black matrix 12 is still formed using photolithography. This results in a relatively low thickness for the black matrix 12. During inkjet printing of the color resists, ink easily overflows from the black matrix 12 into other color resist areas, causing color mixing and affecting the film morphology and thickness of some color resists. Furthermore, to accommodate more ink in the openings of the black matrix, the contact angle between the color resist and the black matrix 12 needs to be increased. This increases the difficulty of developing color resist materials and can lead to excessively high bulges in the central area after color resist film formation, affecting optical performance. Therefore, existing OLED display devices suffer from the technical problem of inkjet-printed color resist overflowing into other color resist areas, causing color mixing and display abnormalities.

[0019] This application provides a display panel and a display device to address the aforementioned technical problems.

[0020] Figure 2 A plan view of the display panel provided in an embodiment of this application. Figure 3 The diagram shows a plan view of the black matrix layer and a stacked diagram of the black matrix layer and the color resist layer provided in the embodiments of this application. Figure 4 This is a first cross-sectional schematic diagram of a display panel provided in an embodiment of this application. Figure 5 This is a second cross-sectional schematic diagram of the display panel provided in an embodiment of this application. Figure 6 This is a third cross-sectional schematic diagram of the display panel provided in an embodiment of this application. Figure 7 This is a fourth cross-sectional schematic diagram of the display panel provided in an embodiment of this application.

[0021] like Figure 2As shown, this application embodiment provides a display panel 2, which includes a display area 201 and a non-display area 202. The non-display area 202 can be arranged around the display area 201. The non-display area 202 includes a left border area, a right border area, a top border area and a bottom border area arranged around the display area 201. Gate driving circuits can be arranged in the left border area and the right border area. Fan-out lines and bonding terminals can be arranged in the bottom border area, and a driving chip can be bonded in the bottom border area.

[0022] Specifically, Figure 2 The non-display area 202 shown in the figure is arranged around the display area 201, but the embodiments of this application are not limited to this. The non-display area 202 can be arranged on one side, two sides or three sides of the display area 201. In order to achieve a full screen, some display panels 2 will bend the non-display area 202 to the back side of the display panel 2 or arrange it on the back side of the display panel 2. In this case, the front side of the display panel 2 may not have the non-display area 202.

[0023] Specifically, such as Figure 2 As shown, the display area 201 includes a pixel area 21 and a non-pixel area 22. The pixel area 21 is the area used for emitting light, and the non-pixel area 22 is the area located between the pixel areas 21. A driving circuit can be set in the non-pixel area 22.

[0024] Specifically, it is understood that when forming the display panel 2, considering the propagation of light and the influence of viewing angle, the size of the opening of the pixel definition layer 332 and the opening of the corresponding black matrix layer 36 may be the same or different. Therefore, the area referred to by the pixel area 21 can be the setting area of ​​the opening of the pixel definition layer 332 in the black matrix layer 36, or it can be the setting area of ​​the opening of the pixel definition layer 332. This application embodiment does not limit this, but only limits the pixel area 21 to be the area of ​​the display panel 2 that emits light. The specific size and definition can be determined according to the actual design, while the non-pixel area 22 is the area located between the pixel areas 21.

[0025] like Figures 2 to 7 As shown, this application embodiment provides a display panel 2, which includes a display area 201, the display area 201 including a pixel area 21 and a non-pixel area 22, the display panel 2 including a substrate 31, an insulating layer (e.g., a first touch insulating layer 353), a black matrix layer 36 and a color resist layer 37; the insulating layer is disposed on one side of the substrate 31, the insulating layer has a first groove 353a in the non-pixel area 22, the black matrix layer 36 is disposed on the side of the insulating layer away from the substrate 31, the black matrix layer 36 includes an opening 361 disposed in the pixel area 21, the color resist layer 37 is disposed on the side of the black matrix layer 36 away from the substrate 31, and a portion of the color resist layer 37 is disposed in the opening 361; The black matrix layer 36 is disposed in the first groove 353a and a second groove 362 is provided on the side away from the insulating layer, and another part of the color resist layer 37 is disposed in the second groove 362.

[0026] This application provides a display panel 2 in which an insulating layer has a first groove 353a in a non-pixel area 22, a black matrix layer 36 is disposed in the first groove 353a and a second groove 362 is disposed on the side away from the insulating layer, and a color resist layer 37 is disposed in the second groove 362. This allows the color resist to overflow into the second groove 362 during its formation, even if overflow occurs, instead of overflowing into other color resist areas. This reduces the risk of color mixing during inkjet printing, eliminates the need to reduce the thickness of the black matrix layer, avoids increasing the reflectivity of the display panel, and minimizes the risk of ink overflow into other color resist areas. Furthermore, the contact angle between the color resist and the black matrix layer is more flexible, reducing the difficulty of developing color resist materials. It also avoids excessive bulging in the middle area of ​​the color resist, thus improving the optical performance of the display panel.

[0027] Specifically, it can be understood that when inkjet printing is used to form the color resist layer 37, the black matrix layer 36 is formed by photolithography and has a relatively small thickness. The minimum volume of the opening of the black matrix layer 36 is 2.4 cubic micrometers, while the volume of ink droplets from inkjet printing is generally 2.4 cubic micrometers to 3.5 cubic micrometers. This means that the volume of ink droplets from inkjet printing may be larger than the volume of the opening, and the ink droplets will overflow from the opening 361 of the black matrix layer 36. This causes the ink droplets to flow into the adjacent color resist setting area, resulting in color mixing. However, in this embodiment, by providing a first groove 353a in the non-pixel area 22 of the insulating layer, and the black matrix layer 36 is disposed in the first groove and a second groove 362 is provided on the side away from the insulating layer, even if the volume of the ink droplets is larger than the volume of the opening, the second groove 362 has a certain volume to accommodate the overflowing ink droplets, and the second groove can also impede the flow of ink droplets, thereby reducing the risk of color mixing when inkjet printing forms color resists.

[0028] Specifically, it is understandable that, in order to prevent overflow, comparative display devices would increase the contact angle of the black matrix layer 36 and the inkjet-printed color resist. However, this would limit the performance of the color resist material and the black matrix layer material, leading to greater difficulty in material development and increased costs. In contrast, the embodiments of this application provide a first groove 353a in the non-pixel area 22 of the insulating layer, and the black matrix layer 36 is disposed in the first groove and has a second groove 362 on the side away from the insulating layer. The second groove 362 accommodates the ink forming the color resist and blocks the overflow of the ink forming the color resist. There is no need to control the contact angle of the black matrix layer 36 and the color resist layer 37, which makes the material selection of the black matrix layer 36 and the color resist layer 37 more diverse, reduces the difficulty of material development, and reduces costs.

[0029] Specifically, it is understandable that, in order to prevent overflow, the contact angle between the black matrix layer 36 and the inkjet-printed color resist in a comparative display device is increased. This results in a higher bulge in the middle area of ​​the final color resist, and the morphology of the color resist will affect the light efficiency of the display panel. In this embodiment, by providing a first groove 353a in the non-pixel area 22 of the insulating layer, and the black matrix layer 36 being disposed in the first groove and having a second groove 362 on the side away from the insulating layer, the second groove 362 can accommodate the ink forming the color resist and block the ink overflow of the color resist. This can control the contact angle between the black matrix layer 36 and the color resist layer 37, making the height difference between the middle area and the edge area of ​​the color resist relatively small, thereby changing the morphology of the color resist and improving the optical performance of the display panel.

[0030] Specifically, some display devices form the second groove 362 by directly etching the black matrix layer 36, instead of etching the insulating layer to form the first groove and then forming the second groove 362 through the flow of the black matrix. This results in the thickness of the portion of the black matrix layer 36 corresponding to the second groove 362 being less than the thickness of other portions. Since the portion of the black matrix layer 36 with the second groove 362 corresponds to the second touch metal layer and / or the first touch metal layer, the light-shielding effect of the black matrix layer 36 deteriorates, leading to increased reflectivity of the display panel and affecting the display effect. In this embodiment, the insulating layer has a first groove 353a within the non-pixel area 22, and the black matrix layer 36 is disposed within the first groove with the second groove 362 on the side away from the insulating layer. This ensures that the thickness of the portion of the black matrix layer 36 within the first groove does not need to be reduced or is reduced only slightly, thereby avoiding a reduction in the light-shielding effect of the black matrix layer 36 on the first and second touch metal layers, achieving the effect of reducing the reflectivity of the display panel and improving its optical performance.

[0031] Specifically, in some display devices, a second groove 362 is formed by directly etching the black matrix layer 36, and the second groove 362 penetrates the black matrix layer. However, when the second groove 362 penetrates the black matrix layer, if the second groove 362 corresponds to the second touch metal layer and / or the first touch metal layer, it will lead to an increase in reflectivity. If the second groove 362 does not correspond to the second touch metal layer and / or the first touch metal layer, then the width of the second groove 362 is relatively narrow, the manufacturing process is more difficult, and the volume of the second groove 362 is relatively small. In addition, the second groove 362 penetrating the black matrix layer will increase the risk of the black matrix layer 36 peeling off. In the embodiment of this application, the second groove 362 does not penetrate the black matrix layer 36, thereby avoiding an increase in the reflectivity of the display panel. The width of the second groove can be set to be larger, which can accommodate more ink and reduce the risk of color mixing. Furthermore, the black matrix layer 36 is set within the first groove 353a of the insulating layer, which reduces the risk of the black matrix layer 36 peeling off.

[0032] In some embodiments, such as Figures 5 to 7 As shown, the portion of the color resist layer 37 located within the opening 361 is continuous with the portion of the color resist layer 37 located within the adjacent second groove 362.

[0033] Specifically, when forming the color resist layer 37, inkjet printing ink is used to form each color resist. When the ink overflows from the opening 361, it overflows into the second groove 362, making the portion of the color resist layer 37 located in the opening 361 continuous with the portion of the color resist layer 37 located in the adjacent second groove 362. However, the embodiments of this application are not limited to this. In the actual film formation process, the portion of the color resist layer 37 located in the opening 361 may break off from the portion of the color resist layer 37 located in the adjacent second groove 362.

[0034] In some embodiments, such as Figures 4 to 7As shown, the display panel 2 includes a touch layer 35, which is disposed between the substrate 31 and the black matrix layer 36. The touch layer 35 includes a first touch metal layer 352, a first touch insulating layer 353, and a second touch metal layer 354. The first touch insulating layer 353 is disposed between the first touch metal layer 352 and the second touch metal layer 354, and the second touch metal layer 354 is disposed between the first touch insulating layer 353 and the black matrix layer 36. The insulating layer is the first touch insulating layer 353. By using a first touch insulating layer 353 as the insulating layer, a first groove 353a is formed in the non-pixel area 22 of the first touch insulating layer 353. The black matrix layer 36 contacts the first touch insulating layer 353, thereby allowing the black matrix layer 36 to fill the first groove 353a and form a second groove 362. The second groove 362 accommodates the overflowing ink, reducing the risk of color mixing when inkjet printing forms color resists. It also eliminates the need to reduce the thickness of the black matrix layer, avoiding an increase in the reflectivity of the display panel. Furthermore, since the risk of ink overflowing from one color resist to other color resist areas is low, the range of contact angles between the color resist and the black matrix layer is wide, reducing the development difficulty of color resist materials. It also avoids excessive bulging in the middle area of ​​the color resist, improving the optical performance of the display panel.

[0035] Specifically, the insulating layer can be an inorganic film layer in contact with the black matrix layer. The specific film layer can be determined according to the design of different display panels. In this application embodiment, the insulating layer is the second touch insulating layer in the touch layer as an example. When the insulating layer is other film layers, please refer to the following description, which will not be repeated in the following embodiments.

[0036] Specifically, the material of the first touch insulating layer can be an inorganic material, such as silicon nitride, silicon oxide, silicon oxynitride, or a stack of these materials.

[0037] In some embodiments, such as Figure 4 As shown, the touch layer 35 further includes a second touch insulating layer 351, which is disposed between the first touch metal layer 352 and the substrate 31. The thickness L1 of the first touch insulating layer 353 is greater than the thickness L2 of the second touch insulating layer 351. By making the thickness of the first touch insulating layer 353 greater than the thickness of the second touch insulating layer 351, the depth of the first groove 353a is relatively large when etching the first touch insulating layer 353 to form the first groove 353a. Correspondingly, the depth of the second groove 362 is relatively large. This avoids the first touch insulating layer 353 being penetrated by the first groove 353a, thus preventing it from failing to block the first and second touch metal layers and improving the yield of the display panel.

[0038] Specifically, in some display devices, when the first touch insulating layer 353 is not etched, the thickness of the first touch insulating layer 353 is close to or even the same as the thickness of the second touch insulating layer 351. However, in this embodiment, the first touch insulating layer 353 needs to form a first groove 353a. To prevent the first groove 353a from penetrating the first touch insulating layer 353 and causing direct contact between the first touch metal layer and the second touch metal layer, and to prevent the thickness of the portion of the first touch insulating layer 353 corresponding to the first groove 353a from being too small and causing breakdown between the first touch metal layer and the second touch metal layer, the thickness of the first touch insulating layer 353 can be made greater than the thickness of the second touch insulating layer 351, thereby improving the yield of the display panel.

[0039] Specifically, it can be understood that the thickness of the portion of the first touch insulating layer 353 corresponding to the first groove 353a is different from the thickness of the other portions of the first touch insulating layer 353 outside the first groove 353a. Specifically, the thickness of the portion of the first touch insulating layer 353 corresponding to the first groove 353a is less than the thickness of the other portions of the first touch insulating layer 353 outside the first groove 353a. Alternatively, the thickness of the portion of the first touch insulating layer 353 corresponding to the first groove 353a can be greater than the thickness of the second touch insulating layer 351, or the thickness of the portion of the first touch insulating layer 353 corresponding to the first groove 353a can be greater than the thickness of the second touch insulating layer 351, or the thickness of the portion of the first touch insulating layer 353 corresponding to the first groove 353a can be greater than the thickness of the second touch insulating layer 351, and the thickness of the portion of the first touch insulating layer 353 corresponding to the first groove 353a can be less than or equal to the thickness of the second touch insulating layer 351.

[0040] Specifically, the thickness of the portion of the first touch insulating layer 353 outside the first groove 353a can be 1.5 to 3 times the thickness of the second touch insulating layer 351.

[0041] Specifically, the thickness of the second touch insulating layer 351 can be from 1 micrometer to 1.5 micrometers.

[0042] Specifically, the thickness of the portion of the first touch insulating layer 353 corresponding to the outside of the first groove 353a can be 1.5 micrometers to 3 micrometers, specifically, the thickness of the portion of the first touch insulating layer 353 corresponding to the outside of the first groove 353a can be 2 micrometers to 3 micrometers; the thickness of the portion of the first touch insulating layer 353 corresponding to the first groove 353a can be greater than or equal to 1 micrometer.

[0043] In some embodiments, such as Figures 4 to 7As shown, there is a gap between the bottom of the first groove 353a and the top of the first touch metal layer 352. By creating a gap between the bottom of the first groove 353a and the top of the first touch metal layer 352, the first touch insulating layer 353 can still block the first touch metal layer 352 and the second touch metal layer 354, thus preventing a short circuit between the first touch metal layer 352 and the second touch metal layer 354.

[0044] Specifically, the distance between the bottom of the first groove 353a and the top of the first touch metal layer 352 can be greater than or equal to 1 micrometer.

[0045] In some embodiments, such as Figures 4 to 7 As shown, the projection of the first groove 353a on the substrate 31 overlaps with the projection of the second touch metal layer 354 on the substrate 31. By making the projection of the first groove 353a on the substrate 31 overlap with the projection of the second touch metal layer 354 on the substrate 31, more positions of the first groove 353a can be set, and the width of the first groove 353a can be set larger, thereby correspondingly increasing the width of the second groove 362, increasing the volume of ink that the second groove 362 can hold, reducing the risk of color mixing when inkjet printing forms color resists, and eliminating the need to reduce the thickness of the black matrix layer, thus avoiding increasing the reflectivity of the display panel. Furthermore, since the risk of ink overflowing from one color resist to other color resist setting areas is low, the range of selectable contact angles between the color resist and the black matrix layer is wider, reducing the development difficulty of color resist materials, and avoiding excessively high protrusions in the middle area of ​​the color resist, thus improving the optical performance of the display panel.

[0046] Specifically, such as Figures 4 to 7 As shown, at least some of the signal lines in the second touch metal layer are disposed within the first groove 353a, and the black matrix layer 36 covers the signal lines to shield them from light and reduce the reflectivity of the display panel.

[0047] Specifically, Figures 4 to 7 The example described uses the case where all signal lines in the second touch metal layer are disposed within the first groove 353a. However, the embodiments of this application are not limited to this. Some signal lines may be disposed within the first groove 353a, or a portion of the signal lines may be disposed within the first groove 353a and a portion may be disposed outside the first groove 353a, or the signal lines may not be disposed within the first groove. Similarly, the signal lines in the first touch metal layer may be disposed corresponding to the first groove 353a or may not be disposed corresponding to the first groove 353a. They may be partially disposed corresponding to the first groove 353a or may be entirely disposed corresponding to the first groove 353a.

[0048] In some embodiments, such as Figures 4 to 7As shown, the second touch metal layer 354 includes multiple signal lines 354a. The width L3 of the first groove 353a is greater than the width L4 of the signal lines 354a. By making the width of the first groove 353a greater than the width of the signal lines, the width of the first groove 353a is larger, and the width of the corresponding second groove 362 is larger, so that the second groove 362 can accommodate more ink, reducing the risk of color mixing when inkjet printing forms color resists. It also eliminates the need to reduce the thickness of the black matrix layer, avoiding an increase in the reflectivity of the display panel. Furthermore, since the risk of ink overflowing from one color resist to the setting area of ​​other color resists is low, the range of contact angles between the color resist and the black matrix layer is wider, reducing the development difficulty of color resist materials. It also avoids excessive bulging in the middle area of ​​the color resist, improving the optical performance of the display panel.

[0049] Specifically, the width of the first groove 353a is made greater than the width of the signal line 354a, so that when the signal line 354a is set in the first groove 353a, the signal line 354a can be set on the same plane, avoiding the problem of broken wires or uneven thickness when the signal line climbs up the slope.

[0050] It is understood that the signal lines in the embodiments of this application are not limited to traces. The signal lines can be signal traces, electrodes, connecting lines, or other structures formed by the second touch metal layer.

[0051] Specifically, the width L4 of signal line 354a can be 1 micrometer.

[0052] Specifically, the width L5 of the first groove 353a extending beyond the signal line 354a can be between 2 micrometers and 10 micrometers.

[0053] In some embodiments, such as Figure 6 As shown, the first touch insulating layer 353 includes multiple stacked sub-layers (e.g., the first sub-layer 431), and the first groove 353a penetrates at least one sub-layer. By including multiple stacked sub-layers in the first touch insulating layer 353, the thickness of the first touch insulating layer 353 is relatively large, so the first groove 353a will not penetrate the first touch insulating layer 353 when forming the first groove 353a, avoiding short circuit between the first touch metal layer and the second touch metal layer. Furthermore, the first groove 353a penetrates at least one sub-layer, resulting in a larger depth of the first groove 353a. Correspondingly, the second groove 362 can accommodate more ink, reducing the risk of color mixing when inkjet printing forms color resists. It also eliminates the need to reduce the thickness of the black matrix layer, avoiding an increase in the reflectivity of the display panel. Since the risk of ink overflowing from one color resist to other color resist areas is low, the range of contact angles between the color resist and the black matrix layer is wider, reducing the development difficulty of color resist materials. It also avoids excessive bulging in the middle area of ​​the color resist, improving the optical performance of the display panel.

[0054] Specifically, such as Figure 6 As shown, the first touch insulating layer 353 includes a first sub-layer 431, a second sub-layer 432 and a third sub-layer 433 arranged sequentially. The materials of the first sub-layer 431, the second sub-layer 432 and the third sub-layer 433 can be the same, and the thicknesses of the first sub-layer 431, the second sub-layer 432 and the third sub-layer 433 can be the same (there may be some differences due to process errors).

[0055] Specifically, such as Figure 6 As shown, the thickness of the first sub-layer 431 can be equal to the thickness of the second touch insulating layer 351.

[0056] Specifically, such as Figure 6 As shown, the first groove 353a can penetrate the third sub-layer 433 and extend into the second sub-layer 432. However, the embodiments of this application are not limited to this. The bottom of the first groove 353a may be spaced from the bottom of the third sub-layer 433. The first groove 353a may penetrate only the third sub-layer 433, or it may penetrate both the third sub-layer 433 and the second sub-layer 432.

[0057] Specifically, Figure 6 The first touch insulating layer 353 includes three sub-layers as an example for illustration, but the embodiments of this application are not limited to this. The first touch insulating layer 353 may include two sub-layers, four sub-layers or more sub-layers. The first groove 353a may penetrate one or more sub-layers, or the depth of the first groove 353a may be less than the thickness of the uppermost sub-layer, or the first groove 353a may penetrate part of the sub-layer and extend into other sub-layers.

[0058] In some embodiments, such as Figures 4 to 7 As shown, the thickness L6 of the portion of the black matrix layer 36 located within the first groove 353a is greater than the thickness L7 of the portion of the black matrix layer 36 located outside the first groove 353a.

[0059] Specifically, when setting the black matrix layer 36, since the first touch insulating layer 353 has a first groove 353a, the organic photoresist forming the black matrix layer 36 has fluidity and will flow into the first groove 353a. This makes the height of the part of the black matrix layer 36 located in the first groove 353a relative to the substrate 31 different from the height of the part of the black matrix layer 36 located outside the first groove 353a relative to the substrate 31, thereby forming a second groove 362. Due to the fluidity of the organic photoresist, in the actual formation process, the thickness of the part of the black matrix layer 36 located in the first groove 353a will be greater than the thickness of the part of the black matrix layer 36 located outside the first groove 353a.

[0060] Specifically, the thickness L6 of the portion of the black matrix layer 36 located within the first groove 353a is less than or equal to the thickness L7 of the portion of the black matrix layer 36 located outside the first groove 353a.

[0061] Specifically, the thickness of the portion of the black matrix layer 36 located within the first groove 353a can be made equal to the thickness of the portion of the black matrix layer 36 located outside the first groove 353a.

[0062] Specifically, the thickness of the portion of the black matrix layer 36 located within the first groove 353a can be 2 micrometers to 4 micrometers, and the thickness of the portion of the black matrix layer 36 located outside the first groove 353a can be 1 micrometer to 3 micrometers.

[0063] In some embodiments, the pixel region 21 includes a plurality of sub-pixel regions (e.g., a first sub-pixel region 211), each of the sub-pixel regions being surrounded by a second groove 362, or each of the sub-pixel regions being surrounded by a plurality of second grooves 362.

[0064] In some embodiments, such as Figure 3 As shown, the color resist layer 37 includes a first color resist 371, a second color resist 372, and a third color resist 373. The first color resist 371 and the third color resist 373 are alternately arranged along a first direction X to form a first color resist row 411. The first color resist 371 and the third color resist 373 are alternately arranged along a second direction Y to form a first color resist column 421. A plurality of second color resists 372 are alternately arranged along the first direction X to form a second color resist row 412. A plurality of second color resists 372 are alternately arranged along the second direction Y to form a second color resist column 422. The second groove 362 surrounding the second color resist 372 contacts the second groove 362 surrounding the first color resist 371, and the second groove 362 surrounding the second color resist 372 contacts the second groove 362 surrounding the third color resist 373. Any two adjacent color resists among the first color resist 371, the second color resist 372, and the third color resist 373 are spaced apart.

[0065] Specifically, such as Figure 3 As shown, the first sub-groove 362a contacts the second sub-groove 362b, and the second sub-groove 362b contacts the third sub-groove 362c. This results in a larger width for each of the second grooves, allowing them to hold a larger volume of ink. When ink from inkjet printing overflows into the second grooves, the inks corresponding to different color resists will not come into contact, thus ensuring that the color resists are spaced apart. However, the embodiments of this application are not limited to this; the color resists can be made to contact each other.

[0066] Specifically, such asFigure 3 As shown, Figure 3 Image (a) shows a planar view of the black matrix layer 36. Figure 3 (b) in the middle shows Figure 3 Planar view of the stacked black matrix layer 36 and color resist layer 37 in (a). Figure 3 As shown in (a), pixel area 21 includes a first sub-pixel area 211, a second sub-pixel area 212, and a third sub-pixel area 213. The opening 361 of the black matrix layer 36 includes a first opening 361a, a second opening 361b, and a third opening 361c corresponding to the first sub-pixel area 211, the second sub-pixel area 212, and the third sub-pixel area 213, respectively. In the non-pixel area 22, the second groove 362 of the black matrix layer 36 includes a first sub-groove 362a, a second sub-groove 362b, and a third sub-groove 362c respectively disposed on the periphery of the first sub-pixel area 211, the second sub-pixel area 212, and the third sub-pixel area 213.

[0067] like Figure 3 As shown in (b), the inks forming the first color resist 371, the second color resist 372, and the third color resist 373 are respectively accommodated by the first sub-groove 362a, the second sub-groove 362b, and the third sub-groove 362c, so that in the formed display panel, the first color resist 371, the second color resist 372, and the third color resist 373 are respectively disposed in the first sub-groove 362a, the second sub-groove 362b, and the third sub-groove 362c.

[0068] Specifically, it is understandable that, taking ink overflow during inkjet printing as an example, considering that overflow may not occur in certain areas during inkjet printing, the color resist can be set only in the corresponding opening. For example, when inkjet printing forms the third color resist 373, some or all of the ink forming the third color resist 373 may not overflow. In this case, some or all of the third color resist 373 may not be set in the third sub-groove 362c, and some or all of the third color resist 373 may not be set on the black matrix layer 36 between the third sub-groove 362c and the third opening 361c.

[0069] Specifically, such as Figure 4 As shown, Figure 4 It shows Figure 3 (a) shows a cross-sectional view of the black matrix layer 36 when it is set in the display panel 2. Figure 4 As can be seen, each sub-pixel area is surrounded by a second groove.

[0070] Specifically, this application embodiment is illustrated by taking the second groove surrounding the sub-pixel area as an example, but this application embodiment is not limited to this. For example, the second groove can be set on one side, both sides or three sides of the sub-pixel area, and the second groove can partially surround the sub-pixel area, surround one-third of the sub-pixel area, or surround two-thirds of the sub-pixel area.

[0071] Specifically, such as Figure 5 As shown, the color resist does not completely fill the second groove. That is, in the actual design, when the volume of the second groove 362 is large, the color resist can fill part of the second groove instead of completely filling it. However, when the ink overflow volume is large, the color resist can completely fill the second groove.

[0072] In some embodiments, the area of ​​the first color resist 371 may be larger than the area of ​​the second color resist 372, and the area of ​​the first color resist 371 may be smaller than the area of ​​the third color resist 373.

[0073] Specifically, the diameter of the first color resistor 371 can be larger than the diameter of the second color resistor 372, and the diameter of the first color resistor 371 can be smaller than the diameter of the third color resistor 373.

[0074] Specifically, such as Figure 7 As shown, the width of the second groove surrounding the first color resist 371 can be equal to the width of the second groove surrounding the second color resist 372, and the width of the second groove surrounding the first color resist 371 can be equal to the width of the second groove surrounding the third color resist 373; alternatively, the widths of the second groove surrounding the first color resist 371, the second groove surrounding the second color resist 372, and the second groove surrounding the third color resist 373 can be unequal.

[0075] Specifically, the light-transmitting colors of the first, second, and third color resists can be red, green, and blue, respectively. However, the embodiments of this application are not limited to this. For example, the light-transmitting colors of the first, second, and third color resists can be red, blue, and green, respectively; the light-transmitting colors of the first, second, and third color resists can be blue, red, and green, respectively; the light-transmitting colors of the first, second, and third color resists can be blue, green, and red, respectively; the light-transmitting colors of the first, second, and third color resists can be green, blue, and red, respectively; the light-transmitting colors of the first, second, and third color resists can be green, red, and blue, respectively.

[0076] Specifically, the width of the first groove 353a ranges from 5 micrometers to 20 micrometers; the depth H1 of the first groove 353a ranges from 0.5 micrometers to 2 micrometers.

[0077] Specifically, the width of the second groove 362 ranges from 5 micrometers to 20 micrometers; the depth H2 of the second groove 362 ranges from 0.5 micrometers to 2 micrometers.

[0078] Specifically, the distance H3 between the second groove 362 and the opening 361 ranges from 1 micrometer to 10 micrometers; the width of the opening 361 ranges from 10 micrometers to 30 micrometers.

[0079] Specifically, the maximum thickness of the color resist layer can be 2 micrometers to 4 micrometers, but the embodiments of this application are not limited to this, and the maximum thickness of the color resist layer can be greater than or equal to 5 micrometers.

[0080] Specifically, the contact angle between the black matrix layer 36 and the color resist layer 37 can be 20 degrees to 60 degrees, or 80 degrees to 90 degrees.

[0081] Specifically, the maximum thickness of the color resist layer can be greater than the maximum thickness of the black matrix layer.

[0082] Specifically, the width of the first groove 353a can be greater than or equal to the width of the second groove 362.

[0083] Meanwhile, to illustrate the design of the display panel in the embodiments of this application, a structure of a display panel 2 is provided as an example, such as... Figure 7 As shown, the display panel 2 includes a substrate 31, a driving circuit layer 32, a light-emitting functional layer 33, an encapsulation layer 34, a touch layer 35, a black matrix layer 36, a color resist layer 37, and a planarization layer 38.

[0084] Specifically, the driving circuit layer 32 includes a buffer layer 321, an active layer 322, a first gate insulating layer 323, a first gate layer 324, a second gate insulating layer 325, a second gate layer 326, an interlayer insulating layer 327, a source-drain layer 328, and a planarization layer 329. It is understood that the driving circuit layer 32 in this embodiment can also have other structures. For example, the driving circuit layer 32 may include two active layers of different materials, or it may include two or three source-drain layers, which will not be elaborated further here.

[0085] Specifically, the light-emitting functional layer 33 includes a pixel electrode layer 331, a pixel definition layer 332, a light-emitting material layer 333, and a common electrode layer 334. The light-emitting material layer 333 may include a first light-emitting material 333a, a second light-emitting material 333b, and a third light-emitting material 333c. The first light-emitting material 333a, the second light-emitting material 333b, and the third light-emitting material 333c may be respectively disposed corresponding to the first color resist, the second color resist, and the third color resist, and the light emission color of the first light-emitting material 333a, the second light-emitting material 333b, and the third light-emitting material 333c may be the same as the light transmission color of the first color resist, the second color resist, and the third color resist, respectively. However, the embodiments of this application are not limited to this, and the light emission color of the first light-emitting material 333a, the second light-emitting material 333b, and the third light-emitting material 333c may all be white.

[0086] Specifically, the areas of the first luminescent material 333a, the second luminescent material 333b, and the third luminescent material 333c can be equal to the areas of the first sub-pixel region 211, the second sub-pixel region 212, and the third sub-pixel region 213. The area of ​​the first luminescent material 333a can be larger than the area of ​​the second luminescent material 333b, and the area of ​​the first luminescent material 333a can be smaller than the area of ​​the third luminescent material 333c.

[0087] Specifically, the encapsulation layer 34 may include a first inorganic layer, an organic layer, and a second inorganic layer arranged sequentially.

[0088] Specifically, the touch layer 35 may include a second touch insulating layer 351, a first touch metal layer 352, a first touch insulating layer 353, and a second touch metal layer 354.

[0089] Specifically, the material of the black matrix layer can be organic photoresist.

[0090] Specifically, the color resist layer can be formed by inkjet printing, and the black matrix layer can be formed by photolithography.

[0091] Specifically, the above embodiments describe the display panel in detail with respect to aspects such as the film layer structure and pixel design of the display panel. It is understood that when there is no conflict between the embodiments, the embodiments can be combined. For example, the first touch insulating layer includes a plurality of stacked sub-layers, the first groove penetrates at least one sub-layer, and the thickness of the portion of the black matrix layer located inside the first groove is greater than the thickness of the portion of the black matrix layer located outside the first groove.

[0092] Meanwhile, this application provides a display device, which includes a display panel as described in any of the above embodiments.

[0093] Specifically, the display device may also include a power supply.

[0094] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more features. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0095] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0096] The embodiments, implementation methods, and related technical features of this application can be combined and substituted for each other without conflict.

[0097] The above are merely preferred embodiments of this application and are not intended to limit this application in any way. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of this application without departing from the scope of the technical solution of this application shall still fall within the scope of the technical solution of this application.

Claims

1. A display panel, characterized in that, The display panel includes a display area, which comprises a pixel area and a non-pixel area, and includes: Substrate; An insulating layer is disposed on one side of the substrate, and the insulating layer has a first groove in the non-pixel area; A black matrix layer is disposed on the side of the insulating layer away from the substrate, and the black matrix layer includes an opening disposed in the pixel region; A color resist layer is disposed on the side of the black matrix layer away from the substrate, and a portion of the color resist layer is disposed within the opening; The black matrix layer is disposed in the first groove and a second groove is provided on the side away from the insulating layer, and another part of the color resist layer is disposed in the second groove.

2. The display panel according to claim 1, characterized in that, The display panel further includes a touch layer, which is disposed between the substrate and the black matrix layer. The touch layer includes a first touch metal layer, a first touch insulating layer and a second touch metal layer. The first touch insulating layer is disposed between the first touch metal layer and the second touch metal layer, and the second touch metal layer is disposed between the first touch insulating layer and the black matrix layer. The insulating layer is the first touch insulating layer.

3. The display panel according to claim 2, characterized in that, The touch layer further includes a second touch insulating layer, which is disposed between the first touch metal layer and the substrate, and the thickness of the first touch insulating layer is greater than the thickness of the second touch insulating layer.

4. The display panel according to claim 3, characterized in that, There is a gap between the bottom of the first groove and the top of the first touch metal layer.

5. The display panel according to claim 2, characterized in that, The projection of the first groove on the substrate overlaps with the projection of the second touch metal layer on the substrate.

6. The display panel according to claim 5, characterized in that, The second touch metal layer includes multiple signal lines, and the width of the first groove is greater than the width of the signal lines.

7. The display panel according to claim 2, characterized in that, The first touch insulating layer includes multiple stacked sub-layers, and the first groove penetrates at least one sub-layer.

8. The display panel according to claim 2, characterized in that, The thickness of the portion of the black matrix layer located within the first groove is greater than the thickness of the portion of the black matrix layer located outside the first groove.

9. The display panel according to claim 2, characterized in that, The color resist layer includes a first color resist, a second color resist, and a third color resist. The first color resist and the third color resist are alternately arranged along a first direction to form a first color resist row. The first color resist and the third color resist are alternately arranged along a second direction to form a first color resist column. A plurality of second color resists are alternately arranged along the first direction to form a second color resist row. A plurality of second color resists are alternately arranged along the second direction to form a second color resist column. Wherein, the second groove surrounding the second color resist is in contact with the second groove surrounding the first color resist, and the second groove surrounding the second color resist is in contact with the second groove surrounding the third color resist. Any two adjacent color resists among the first color resist, the second color resist, and the third color resist are spaced apart.

10. The display panel according to any one of claims 1 to 9, characterized in that, The portion of the color resist layer located within the opening is continuous with the portion of the color resist layer located within the adjacent second groove.

11. A display device, characterized in that, Includes the display panel as described in any one of claims 1 to 10.

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