Display panel and display device

Abstract

The invention provides a display panel and a display device, the display panel comprises a substrate and a color filter layer, the color filter layer comprises a plurality of color resistance blocks and a black matrix, the black matrix is provided with a plurality of through holes, one color resistance block is arranged in one through hole, and the color resistance blocks cover at least part of the black matrix; the color resistance block comprises the cambered surface far away from the substrate, the cambered surface protrudes towards the direction far away from the substrate, and the included angle between the edge of the cambered surface and the surface of the side, far away from the substrate, of the black matrix is the acute angle, so that more light enters the visual angle of an observer through the color filter layer, and the luminous efficiency of the display panel is improved.

Description

Technical Field

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

[0002] Currently, in an Organic Light-Emitting Diode (OLED) display device, in order to reduce the influence of external reflected light on the display effect, a polarizer is usually disposed on the OLED display device. However, due to the large thickness of the polarizer, it will not only cause partial absorption of the emitted light, but also significantly reduce the light efficiency and increase the power consumption.

[0003] In view of the problems existing in the OLED display device using a polarizer, a Pol Less Panel (PLP) technology is proposed. By using a black matrix and color resist to replace the traditional polarizer, it is possible to effectively reduce external reflected light while realizing the thinning of the OLED display device and improving the light transmittance of the OLED display device. However, in the PLP technology, since the black matrix blocks part of the light from the light-emitting layer, these lights cannot pass through the color filter layer and enter the observer's view angle, resulting in a reduction in the overall emitted light, a decrease in the light-emitting efficiency, an impact on the display brightness, making the picture under the same power consumption appear darker, and thus reducing the energy efficiency of the display device. Summary of the Invention

[0004] Embodiments of the present application provide a display panel and a display device to improve the light-emitting efficiency of the display panel.

[0005] To achieve the above functions, the technical solutions provided by the embodiments of the present application are as follows:

[0006] Embodiments of the present application provide a display panel, including:

[0007] A substrate;

[0008] A color filter layer disposed on the substrate, the color filter layer including a plurality of color resist blocks and a black matrix, the black matrix being provided with a plurality of through holes, one of the color resist blocks being disposed in one of the through holes, and the color resist block covering at least part of the black matrix;

[0009] Wherein, the color resist block includes a curved surface on a side away from the substrate, the curved surface protruding away from the substrate, and a first included angle is formed between an edge of the curved surface and a surface of the black matrix on a side away from the substrate, and the first included angle is an acute angle.

[0010] Optionally, in one embodiment, the color-resist block includes a first color-resist portion and a second color-resist portion. The first color-resist portion is disposed within the through-hole, and the second color-resist portion is disposed on a side of the first color-resist portion away from the substrate. The arc surface is the surface of the second color-resist portion on the side away from the substrate.

[0011] The following relationship is satisfied among the thickness of the color-resist block, the thickness of the first color-resist portion, and the thickness of the second color-resist portion: m < H3 ≤ H2 < H1 < n;

[0012] Wherein, H1 is the thickness of the color-resist block, H2 is the thickness of the second color-resist portion, H3 is the thickness of the first color-resist portion, m is 3 millimeters, and n is 10 millimeters.

[0013] Optionally, in one embodiment, the through-hole includes a first opening and a second opening which are oppositely arranged, and the second opening is located on a side of the first opening away from the substrate;

[0014] The following relationship is satisfied among the diameter of the circumscribed circle of the first opening, the diameter of the circumscribed circle of the second opening, the thickness of the second color-resist portion, and the first included angle: tanα = (L2 - L1) / (2H2);

[0015] Wherein, L1 is the diameter of the circumscribed circle of the first opening, L2 is the diameter of the circumscribed circle of the second opening, and α is the first included angle.

[0016] Optionally, in one embodiment, the first included angle is greater than 5 degrees and less than 90 degrees.

[0017] Optionally, in one embodiment, the diameter of the circumscribed circle of the first opening is greater than 10 micrometers and less than 30 micrometers, and the diameter of the circumscribed circle of the second opening is greater than 10 micrometers and less than 30 micrometers;

[0018] Wherein, the diameter of the circumscribed circle of the second opening is greater than the diameter of the circumscribed circle of the first opening.

[0019] Optionally, in one embodiment, there is a second included angle between the side wall of the through-hole and the surface of the black matrix on the side close to the substrate;

[0020] The following relationship is satisfied among the diameter of the circumscribed circle of the first opening, the diameter of the circumscribed circle of the second opening, the thickness of the first color-resist portion, and the second included angle: L2 = L1 + 2H3tanβ;

[0021] Wherein, β is the second included angle, and the second included angle is greater than 15 degrees and less than 90 degrees.

[0022] Optionally, in one embodiment, the black matrix includes a first black matrix portion and a second black matrix portion which are stacked. The first black matrix portion is provided with a plurality of first sub-holes, and the second black matrix portion is provided with a plurality of second sub-holes. One of the second sub-holes corresponds to and communicates with one of the first sub-holes;

[0023] Wherein, one color resist block fills one of the second sub-holes and one of the first sub-holes, and the color resist block covers at least part of the second black matrix portion.

[0024] Optionally, in one embodiment, the second black matrix portion includes a plurality of partition walls which are arranged at intervals. The height of the partition wall is greater than the height of the first black matrix portion, and the second sub-holes are provided between two adjacent partition walls;

[0025] Wherein, a third included angle is formed between the side wall of the first sub-hole and the surface of the first black matrix portion close to the substrate side. The third included angle is greater than 15 degrees and less than 90 degrees; a fourth included angle is formed between the side wall of the second sub-hole and the surface of the partition wall close to the substrate side. The fourth included angle is greater than 30 degrees and less than 90 degrees, and the fourth included angle is greater than the third included angle.

[0026] Optionally, in one embodiment, it includes:

[0027] A pixel definition layer is disposed on one side of the substrate. The pixel definition layer is provided with a plurality of first openings;

[0028] A light-emitting device layer is disposed on the side of the pixel definition layer away from the substrate. The light-emitting device layer includes a plurality of light-emitting units, and one light-emitting unit is disposed in one of the first openings;

[0029] A touch control layer is disposed on the side of the light-emitting device layer away from the pixel definition layer. The touch control layer includes a plurality of touch control traces which are criss-crossed horizontally and vertically;

[0030] Wherein, the color filter layer is disposed on the side of the touch control layer away from the light-emitting device layer. One color resist block corresponds to one light-emitting unit in position. The orthographic projection of the color resist block on the pixel definition layer covers the first opening, or the orthographic projection of the color resist block on the touch control layer covers the touch control trace.

[0031] An embodiment of the present application provides a display device, including the display panel described in any one of the above.

[0032] Advantages of the embodiments of the present application: The embodiments of the present application provide a display panel and a display device. The display panel includes a substrate and a color filter layer. The color filter layer includes a plurality of color resist blocks and a black matrix. The black matrix is provided with a plurality of through holes. One color resist block is disposed in one through hole, and the color resist block covers at least a part of the black matrix. By providing that the color resist block includes a curved surface on the side away from the substrate, the curved surface protrudes away from the substrate, and the angle between the edge of the curved surface and the surface of the black matrix on the side away from the substrate is an acute angle, more light can pass through the color filter layer and enter the observer's view angle, thereby improving the light emission efficiency of the display panel. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without creative efforts.

[0034] In order to more completely understand the present application and its beneficial effects, the following will be described in conjunction with the drawings, where the same reference numerals represent the same parts in the following description.

[0035] Figure 1 It is a schematic structural diagram of the display panel provided by the embodiments of the present application;

[0036] Figure 2 Provided by the embodiments of the present application Figure 1 The first cross-sectional schematic diagram corresponding to A-A' in;

[0037] Figure 3 Provided by the embodiments of the present application Figure 2 The enlarged schematic diagram at B in;

[0038] Figure 4 Provided by the embodiments of the present application Figure 1 The second cross-sectional schematic diagram corresponding to A-A' in;

[0039] Figure 5 Provided by the embodiments of the present application Figure 1 The third cross-sectional schematic diagram corresponding to A-A' in;

[0040] Figure 6 Provided by the embodiments of the present application Figure 5 The enlarged schematic diagram at C in;

[0041] Figure 7 It is a flowchart of the manufacturing method of the display panel provided by the embodiments of the present application;

[0042] Figures 8A to 8D ForFigure 7 Structural process flowchart for manufacturing a display panel;

[0043] Figure 9 Schematic structural diagram of the display device provided by the embodiment of the present application.

[0044] Description of reference numerals:

[0045] 1 - Display panel; 11 - Substrate; 12 - Pixel definition layer; 13 - Light-emitting device layer; 14 - Encapsulation layer; 15 - Touch layer; 16 - Color filter layer; 17 - Cover plate;

[0046] 111 - Substrate base; 112 - Barrier layer; 113 - Driving circuit layer; 1130 - Thin film transistor; 1131 - Semiconductor layer; 1132 - First gate insulating layer; 1133 - First gate; 1134 - Second gate insulating layer; 1135 - Second gate; 1136 - Interlayer insulating layer; 1137 - Source-drain electrode; 1138 - Planarization layer; 121 - First opening; 131 - First electrode layer; 132 - Light-emitting layer; 1311 - First electrode; 1321 - Light-emitting unit; 141 - First inorganic encapsulation layer; 142 - First organic encapsulation layer; 143 - Second inorganic encapsulation layer;

[0047] 151 - Touch trace; 152 - Insulating layer; 161 - Color resist block; 162 - Black matrix; 1611 - First color resist part; 1612 - Second color resist part; 1610 - Arc surface; 1620 - Through hole; 16201 - First opening; 16202 - Second opening; 1621 - First black matrix part; 1622 - Second black matrix part; 16211 - First sub-hole; 16221 - Second sub-hole; 16222 - Retaining wall; 2 - Display device; 21 - Middle frame. Detailed implementation manners

[0048] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without making creative efforts belong to the scope of protection of the present application. In addition, it should be understood that the specific implementation manners described herein are only used to illustrate and explain the present application, and are not used to limit the present application. In the present application, unless otherwise stated, the orientation terms such as "upper" and "lower" generally refer to the upper and lower in the actual use or working mode of the device, specifically the drawing direction in the accompanying drawings; and "inner" and "outer" refer to the outline of the device.

[0049] In addition, the terms "first" and "second" are for descriptive purposes only, and the features defined with "first" and "second" may explicitly or implicitly include one or more of the said features. In the description of the present application, "a plurality of" means two or more, unless otherwise specifically defined.

[0050] In the description of the present application, it should be noted that unless otherwise clearly specified and defined, the terms "mounted", "connected" and "coupled" should be understood in a broad sense. For example, it may be a fixed connection or a detachable connection; it may be a mechanical connection, an electrical connection or a connection capable of mutual communication; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0051] The following disclosure provides many different embodiments for implementing different structures of the present application. To simplify the disclosure of the present application, components and settings of specific examples are described below. Of course, they are only examples and are not intended to limit the present application. In addition, various specific examples of processes and materials are provided in the present application, but those of ordinary skill in the art can be aware of the application of other processes and / or the use of other materials.

[0052] Please refer to Figure 1 、 Figure 2 and Figure 3 ; wherein, Figure 1 is a schematic structural diagram of a display panel provided by an embodiment of the present application; Figure 2 is the first cross-sectional schematic diagram corresponding to the A-A` position in Figure 1 provided by an embodiment of the present application; Figure 3 is an enlarged schematic diagram of the B position in Figure 2 provided by an embodiment of the present application.

[0053] This embodiment provides a display panel 1, which includes but is not limited to an Organic Light Emitting Diode (OLED) display panel. The display panel 1 includes a substrate 11, a pixel definition layer 12, a light-emitting device layer 13, a packaging layer 14, a touch layer 15, a color filter layer 16, and a cover plate 17 that are stacked; wherein, the substrate 11 includes but is not limited to an array substrate. By providing the color filter layer 16 to replace the polarizer in the related art, not only can the thickness of the display panel 1 be effectively reduced to achieve a thin and light design, but also the external reflected light can be reduced, and the light transmittance of the display panel 1 can be improved, thereby enhancing the display effect.

[0054] The substrate 11 includes a base 111, a barrier layer 112, and a driving circuit layer 113 which are stacked. The driving circuit layer 113 is disposed on a side of the barrier layer 112 away from the base 111. The base 111 may include a first substrate, a spacer layer, and a second substrate which are stacked in sequence. The first substrate and the second substrate may both be a rigid substrate or a flexible substrate. The materials of the first substrate and the second substrate may both be materials such as glass, quartz, or polyimide. The material of the spacer layer includes, but is not limited to, water-absorbing materials such as silicon nitride and silicon oxide. The material of the spacer layer includes, but is not limited to, water-absorbing materials such as silicon nitride and silicon oxide.

[0055] The driving circuit layer 113 is used to drive the light-emitting device layer 13 and provide required electrical signals to control the on / off state and brightness of the light-emitting device, thereby realizing image display and color adjustment of the display panel 1. The driving circuit layer 113 may include a plurality of thin-film transistors 1130. The thin-film transistors 1130 may be of an etch-stop type, a back-channel etch type, or may be classified into a bottom-gate thin-film transistor 1130, a top-gate thin-film transistor 1130, etc. according to the positions of the gate and the active layer. This embodiment does not limit this.

[0056] Specifically, the driving circuit layer 113 may include a semiconductor layer 1131, a first gate insulating layer 1132, a first gate 1133, a second gate insulating layer 1134, a second gate 1135, an interlayer insulating layer 1136, source / drain electrodes 1137, and a planarization layer 1138 which are stacked on the barrier layer 112. Among them, the planarization layer 1138 is used to provide a smooth surface, eliminate the surface unevenness of the base 111 or other layers, and ensure that subsequent layers (such as the pixel definition layer 12, the light-emitting device layer 13, etc.) can be deposited uniformly, thereby improving the display effect and performance of the display panel 1. It can be understood that the driving circuit layer 113 is a conventional film layer well-known to those skilled in the art, and its specific structure is not described in detail here. This embodiment only takes the thin-film transistor 1130 as a top-gate thin-film transistor 1130 as an example to illustrate the technical solution of the present application.

[0057] The pixel definition layer 12 is disposed on a side of the driving circuit layer 113 away from the base 111, and the pixel definition layer 12 is provided with a plurality of first openings 121.

[0058] The light-emitting device layer 13 includes a first electrode layer 131, a light-emitting layer 132, and a second electrode layer (not shown in the figure) that are stacked; the first electrode layer 131 is disposed between the pixel defining layer 12 and the driving circuit layer 113. The first electrode layer 131 includes a plurality of first electrodes 1311 that are spaced apart. One of the first electrodes 1311 is disposed opposite to one of the first openings 121, and the first opening 121 correspondingly exposes the upper surface of a part of the first electrode 1311. The light-emitting layer 132 is disposed on the first electrode layer 131. The light-emitting layer 132 includes a plurality of light-emitting units 1321 that correspond one-to-one to the plurality of first electrodes 1311. The light-emitting units 1321 are disposed within the first openings 121. The second electrode layer is disposed on a side of the light-emitting layer 132 away from the first electrode layer 131.

[0059] Specifically, the first electrode layer 131 may be an anode layer, the first electrode 1311 may be an anode, the second electrode layer may be a cathode layer. The anode is electrically connected to the thin-film transistor 1130. The thin-film transistor 1130 controls the current flowing to the anode by adjusting the gate signal. The anode provides positive charges to drive the light-emitting units 1321. The organic materials in the light-emitting units 1321 are combined under the action of the positive charges of the anode and the negative charges of the cathode layer, generating electroluminescence and emitting visible light.

[0060] The encapsulation layer 14 is disposed on a side of the light-emitting device layer 13 away from the pixel defining layer 12. The encapsulation layer 14 is used to encapsulate the light-emitting device layer 13 to prevent the first electrode layer 131, the light-emitting layer 132, and the second electrode layer in the light-emitting device layer 13 from contacting water and oxygen in the air, thereby shortening the service life of the display panel 1. Among them, the encapsulation layer 14 at least includes a first inorganic encapsulation layer 141, a first organic encapsulation layer 142, and a second inorganic encapsulation layer 143 that are stacked on the pixel defining layer 12. The materials of the first inorganic encapsulation layer 141 and the second inorganic encapsulation layer 143 include but are not limited to silicon nitride, silicon oxide, or silicon oxynitride. The material of the first organic encapsulation layer 142 includes but is not limited to polyacrylate.

[0061] The touch layer 15 is disposed on a side of the encapsulation layer 14 away from the light-emitting device layer 13. The touch layer 15 includes a plurality of touch traces 151 that intersect horizontally and vertically, and an insulating layer 152 covering the touch traces 151. The plurality of touch traces 151 are disposed on a light-emitting side of the display panel 1, and the insulating layer 152 covers the touch traces 151, thereby avoiding interference of the external environment with touch signals. At the same time, the insulating layer 152 can also provide a flat surface for the touch layer 15 to improve the optical performance of the display panel and the consistency of touch response. Moreover, it is convenient for the setting of the color filter layer 16. Among them, the material of the insulating layer 152 includes, but is not limited to, silicon nitride.

[0062] Specifically, the touch layer 15 can be one of mutual capacitance type or self-capacitance type. When the touch layer 15 is of the self-capacitance type, the plurality of touch traces 151 can form a plurality of touch electrodes and touch leads connected to the touch electrodes, and one touch lead is electrically connected to one touch electrode. It should be noted that the above description is only taken as an example in the embodiments of the present application, but is not limited thereto. The specific type and structure of the touch layer 15 can be selected according to actual needs.

[0063] The color filter layer 16 includes a plurality of color resistance blocks 161 and a black matrix 162. The black matrix 162 is provided with a plurality of through holes 1620. One color resistance block 161 is disposed in one through hole 1620, and the color resistance block 161 covers at least a part of the black matrix 162. Among them, the color resistance block 161 includes a curved surface 1610 on a side away from the substrate 111. The curved surface 1610 protrudes in a direction away from the substrate 111, and there is a first included angle α between an edge of the curved surface 1610 and a surface of the black matrix 162 on a side away from the substrate 111. The first included angle α is an acute angle, so that light emitted by the light-emitting unit 1321 generates a specific refraction path when passing through the color resistance block 161, which can effectively reduce lateral leakage of light, and further improve the light-emitting efficiency of the display panel 1.

[0064] Specifically, one color resistance block 161 corresponds to one light-emitting unit 1321 in position. The curved surface 1610 is a convex structure, so that light emitted by the light-emitting unit 1321 can be refracted and diffused when passing through the color resistance block 161, thereby reducing the occlusion of light by the black matrix 162, improving the light transmittance, and further enhancing the display brightness and energy efficiency. At the same time, by setting that there is a first included angle α between an edge of the curved surface 1610 and a surface of the black matrix 162 on a side away from the substrate 111, and the first included angle α is an acute angle, part of the light that might be directly blocked by the black matrix 162 can enter the "observer" viewing range after being refracted or scattered by the curved surface 1610, thereby further reducing light loss and improving the light-emitting efficiency of the display panel 1.

[0065] Further, the material of the black matrix 162 may include a light-absorbing material. The orthographic projection of the black matrix 162 on the substrate 111 covers the orthographic projection of the touch trace 151 on the substrate 111, and the black matrix 162 is arranged to avoid the first opening 121. Thus, the touch trace 151 is shielded by the black matrix 162, so that before the ambient light reaches the touch trace 151, it will first be absorbed by the black matrix 162, preventing it from directly irradiating the touch trace 151, reducing the reflection of the touch trace 151 to the ambient light, and lowering the reflectivity of the display panel 1 in the touch area; meanwhile, it is ensured that the black matrix 162 will not affect the display effect.

[0066] The orthographic projection of the color resist block 161 on the pixel defining layer 12 covers the first opening 121, so that the light in the non-target pixel area can be effectively shielded, avoiding the leakage of stray light, thereby improving the contrast of the display panel 1; meanwhile, the optical loss caused by the offset of the opening position is reduced, thereby improving the light-emitting efficiency of the display panel 1.

[0067] It should be noted that in this embodiment, the type and refractive index of the light-absorbing material are not specifically limited. The color resist block 161 can be formed by an ink jet printing (IJP) process. By using the ink jet printing process, the material waste generated when preparing the color resist block by using a photolithography or mask coating process in the related art can be avoided; meanwhile, compared with the preparation of the color resist block by using a photolithography process in the related art, the ink jet printing process does not require additional photomasks and developing / etching steps, reducing the complex photolithography process, thereby shortening the production cycle of the color resist block and improving the manufacturing efficiency.

[0068] Meanwhile, the fact that the orthographic projection of the color resist block 161 on the pixel defining layer 12 covers the first opening 121 is only for illustration; for example, please refer to Figure 4 the second cross-sectional schematic diagram corresponding to A-A` provided in the embodiment of the present application Figure 1 In another embodiment, the orthographic projection of the color resist block 161 on the touch layer 15 covers the touch trace 151. The color resist block 161 and the black matrix 162 cooperate to further block the ambient light from irradiating onto the touch trace 151, thereby reducing the interference of the ambient light on the display effect and improving the uniformity and contrast of the display effect.

[0069] The cover plate 17 is disposed on a side of the color filter layer 16 away from the touch layer 15. The cover plate 17 includes, but is not limited to, a passivation film (PAS), an optically clear adhesive (OCA), and a cover glass (CG). Among them, the passivation film covers the color filter layer 16, which can increase the leveling property of the color filter layer 16 and improve its surface smoothness, thereby enhancing the display effect; the optically clear adhesive is used to firmly bond the cover glass 17 to the passivation film while ensuring high light transmittance; the cover glass 17 is used to protect the inner components of the display panel 1, provide mechanical strength, and enhance the durability and scratch resistance of the display panel 1.

[0070] Please continue to refer to FIG. to Figure 3 ; In an embodiment, the color resist block 161 includes a first color resist portion 1611 and a second color resist portion 1612. The first color resist portion 1611 is disposed in the through hole 1620, and the second color resist portion 1612 is disposed on a side of the first color resist portion 1611 away from the substrate 111. The arc surface 1610 is the surface of the second color resist portion 1612 on the side away from the substrate 111; the following relationship is satisfied among the color resist block 161, the thickness H3 of the first color resist portion 1611, and the thickness H2 of the second color resist portion 1612: m < H3 ≤ H2 < H1 < n; where H1 is the thickness of the color resist block 161, H2 is the thickness of the second color resist portion 1612, H3 is the thickness of the first color resist portion 1611, m is 3 mm, and n is 10 mm. Thereby, the light propagation path can be optimized, the brightness of the display panel 1 can be increased, and the power consumption can be reduced.

[0071] In the color filter layer 16, the color resist block 161 is used to transmit light of a specific wavelength and absorb light of other wavelengths to achieve color display; by filling the first color resist portion 1611 into the through hole 1620 of the black matrix 162 and setting the thickness H3 of the first color resist portion 1611 to be greater than 3 mm and the thickness H3 of the first color resist portion 1611 to be less than the thickness H2 of the second color resist portion 1612, it is possible to avoid blocking too much light due to the excessive thickness H3 of the first color resist portion 1611. Thereby, while achieving the color filtering effect, the light transmittance can be increased, and further, the brightness and energy efficiency of the display panel 1 can be enhanced.

[0072] It can be understood that the first color resistance portion 1611 fills the through hole 1620, and the arc surface 1610 is the surface of the second color resistance portion 1612 on the side away from the substrate 111. By disposing the second color resistance portion 1612 on the side of the first color resistance portion 1611 away from the substrate 111, a convex arc surface 1610 structure is formed on the side of the color resistance block 161 away from the substrate 111, so that light is refracted or scattered when passing through the second color resistance portion 1612, thereby optimizing the light propagation path and improving the utilization rate of light.

[0073] Meanwhile, by setting the thickness H2 of the second color resistance portion 1612 to be greater than the thickness H3 of the first color resistance portion 1611, the second color resistance portion 1612 has a sufficient thickness to form an effective arc surface 1610 structure; and by setting the thickness H2 of the second color resistance portion 1612 to be less than 10 mm, the decrease in the light transmittance caused by the excessive overall thickness of the color resistance block 161 is avoided, and the brightness of the display panel 1 is further improved.

[0074] Please continue to combine Figures 1 to 3 ; in an embodiment, the through hole 1620 includes a first opening 16201 and a second opening 16202 which are oppositely arranged, and the second opening 16202 is located on the side of the first opening 16201 away from the substrate 111; the outer diameter L1 of the circumcircle of the first opening 16201, the outer diameter L2 of the circumcircle of the second opening 16202, the thickness H2 of the second color resistance portion 1612, and the first included angle α satisfy: tanα = (L2 - L1) / (2H2).

[0075] Wherein, L1 is the outer diameter of the circumcircle of the first opening 16201, L2 is the outer diameter of the circumcircle of the second opening 16202, α is the first included angle, and the size of the first included angle α is jointly determined by the thickness H2 of the second color resistance portion 1612, the outer diameter L1 of the circumcircle of the first opening 16201, and the outer diameter L2 of the circumcircle of the second opening 16202. By reasonably regulating the thickness H2 of the second color resistance portion 1612, the outer diameter L1 of the circumcircle of the first opening 16201, and the outer diameter L2 of the circumcircle of the second opening 16202, the size of the first included angle α can be controlled, thereby optimizing the geometric shape of the arc surface 1610 structure, adjusting the refraction and scattering paths of light, further reducing light blocking and absorption, increasing the light transmittance, and enhancing the brightness and energy efficiency of the display panel 1.

[0076] It can be understood that the first included angle α is greater than 5 degrees, which can avoid insufficient light refraction caused by too small the first included angle α and affect the brightness of the display panel 1; the first included angle α is less than 90 degrees, which can avoid the light propagation direction deviating from the expectation caused by too large the first included angle α and affect the display uniformity; by reasonably setting the first included angle α, the structural stability of the color filter layer 16 can be improved, and a good balance between display performance and manufacturing process can be achieved.

[0077] Please continue to combine Figures 1 to 3 ; in an embodiment, the outer diameter L1 of the circumcircle of the first opening 16201 is greater than 10 microns and less than 30 microns, and the outer diameter L2 of the circumcircle of the second opening 16202 is greater than 10 microns and less than 30 microns. Thus, by controlling the outer diameter L1 of the circumcircle of the first opening 16201 and the outer diameter L2 of the circumcircle of the second opening 16202, the light transmittance and color uniformity can be preferably improved.

[0078] Furthermore, the cross-section of the through hole 1620 is trapezoidal in reverse, the side wall of the through hole 1620 is connected to the edge of the bottom surface of the black matrix 162, the shape of the first color resist portion 1611 matches the shape of the through hole 1620, and the side surface of the first color resist portion 1611 is in mutual fit with the side wall of the through hole 1620. The side of the first color resist portion 1611 close to the substrate 11 is flush with the bottom surface of the black matrix 162.

[0079] It can be understood that when the color resist block 161 is manufactured by an inkjet printing method, the cross-section of the through hole 1620 is trapezoidal in reverse, which can play a certain constraining role at the boundary of the color resist material, reduce the diffusion and uneven accumulation of the color resist material, so that the color resist block 161 can accurately fill the through hole 1620, and avoid the problems of uneven thickness or edge collapse of the color resist block 161.

[0080] Specifically, the diameter L2 of the circumscribed circle of the second opening 16202 is greater than the diameter L1 of the circumscribed circle of the first opening 16201, such that the cross-sectional shape of the through hole 1620 is an inverted trapezoid, thereby reducing the total reflection phenomenon of light within the color resistance block 161 and increasing the light exit rate. It can be understood that the shape of the first color resistance portion 1611 matches the shape of the through hole 1620, and the side surface of the first color resistance portion 1611 is in close contact with the side wall of the through hole 1620. The cross-sectional shape of the through hole 1620 is an inverted trapezoid, that is, the cross-sectional shape of the first color resistance portion 1611 is also an inverted trapezoid. When light enters the first color resistance portion 1611, due to the guiding effect of the inverted trapezoid structure, the propagation direction of the light becomes more perpendicular to the exit surface of the display panel 1, thereby reducing the light loss caused by large-angle incidence and increasing the light transmittance. At the same time, the inverted trapezoid structure can effectively reduce the absorption and scattering of light within the first color resistance portion 1611, thereby reducing the light energy loss and further enhancing the brightness and energy efficiency of the display panel 1.

[0081] Furthermore, there is a second included angle β between the side wall of the through hole 1620 and the surface of the black matrix 162 close to the substrate 111 side; the diameter L1 of the circumscribed circle of the first opening 16201, the diameter L2 of the circumscribed circle of the second opening 16202, the thickness H3 of the first color resistance portion 1611, and the second included angle β satisfy: L2 = L1 + 2H3tanβ.

[0082] Wherein, β is the second included angle, the second included angle β is greater than 15 degrees and less than 90 degrees, and the magnitude of the second included angle β is jointly determined by the diameter L1 of the circumscribed circle of the first opening 16201, the diameter L2 of the circumscribed circle of the second opening 16202, and the thickness H3 of the first color resistance portion 1611. By reasonably regulating the diameter L1 of the circumscribed circle of the first opening 16201, the diameter L2 of the circumscribed circle of the second opening 16202, and the thickness H3 of the first color resistance portion 1611, the magnitude of the second included angle β can be controlled, thereby optimizing the geometric shape of the through hole 1620, adjusting the refraction and transmission paths of light, and further reducing light loss and enhancing the brightness and optical performance of the display panel 1.

[0083] Specifically, according to the relational expressions tanα = (L2 - L1) / (2H2) and L2 = L1 + 2H3tanβ, it can be known that tanα = (H3tanβ) / (H2). The magnitude of the first included angle α is jointly affected by the magnitude of the second included angle β, the thickness H2 of the second color resistance portion 1612, and the thickness H3 of the first color resistance portion 1611. Among them, the magnitude of the first included angle α is positively correlated with the magnitude of the second included angle β. When the magnitude of the second included angle β decreases, the magnitude of the first included angle α also decreases accordingly, resulting in an increase in the curvature of the arc surface 1610, and the refraction and scattering effects of light during passing are enhanced, but it may cause excessive focusing or internal reflection of light, affecting the light transmittance. On the contrary, when the magnitude of the first included angle α increases, the magnitude of the first included angle α also increases accordingly, then the arc surface 1610 tends to be flat, that is, the height of the arc surface 1610 decreases relatively, and the refraction and scattering effects of light during passing are weakened, affecting the light guiding property and uniform propagation of light.

[0084] It can be understood that in this embodiment, by reasonably adjusting the magnitude of the second included angle β, the range of the first included angle α can be optimized, so that the arc surface 1610 structure can not only effectively guide light but also reduce light loss, improve the light transmittance and optical performance of the display panel 1, and further enhance the display effect.

[0085] Please refer to Figure 1 、 Figure 5 and Figure 6 ; among them, Figure 5 is the third cross-sectional schematic diagram corresponding to the A - A` position provided by the embodiment of the present application in Figure 1 ; Figure 6 is the enlarged schematic diagram at the C position provided by the embodiment of the present application in Figure 5 ;

[0086] In one embodiment, the black matrix 162 includes a first black matrix portion 1621 and a second black matrix portion 1622 which are stacked. The first black matrix portion 1621 is provided with a plurality of first sub-holes 16211, and the second black matrix portion 1622 is provided with a plurality of second sub-holes 16221. One of the second sub-holes 16221 corresponds to and communicates with one of the first sub-holes 16211. Among them, one color resistance block 161 fills one of the second sub-holes 16221 and one of the first sub-holes 16211, and the color resistance block 161 covers at least part of the second black matrix portion 1622, thereby improving the uniformity and stability of the color resistance block 161.

[0087] Specifically, the thickness of the first black matrix portion 1621 is greater than or equal to 1 μm, and the thickness of the second black matrix portion 1622 is greater than or equal to 2 μm; and the thickness of the second black matrix portion 1622 is greater than the thickness of the first black matrix portion 1621; by arranging the color resist block 161 to cover at least part of the second black matrix portion 1622, when the color resist block 161 is fabricated by inkjet printing, the second black matrix portion 1622 can provide additional structural support, and the second black matrix portion 1622 can play a certain constraining role at the boundary of the color resist material, reducing the diffusion and uneven accumulation of the color resist material, so that the color resist block 161 can accurately fill the first sub-hole 16211 and the second sub-hole 16221, avoiding the problems of uneven thickness or edge collapse of the color resist block 161.

[0088] Further, the second black matrix portion 1622 includes a plurality of retaining walls 16222 arranged at intervals, and the retaining walls 16222 can limit the flow range of the color resist material, preventing the color resist material from excessively diffusing or shrinking during the deposition process, thereby improving the morphological stability of the color resist block 161; wherein, the height of the retaining walls 16222 is greater than the height of the first black matrix portion 1621, thereby improving the strength of the retaining walls 16222, such that during the manufacturing process of the color resist block 161, even if there is a shrinkage effect in the color resist material, it will not cause boundary collapse or morphological distortion.

[0089] Specifically, the second sub-hole 16221 is provided between two adjacent retaining walls 16222, and there is a third included angle γ between the side wall of the first sub-hole 16211 and the surface of the first black matrix portion 1621 close to the substrate 111 side, and the third included angle γ is greater than 15 degrees and less than 90 degrees; there is a fourth included angle θ between the side wall of the second sub-hole 16221 and the surface of the retaining wall 16222 close to the substrate 111 side, and the fourth included angle θ is greater than 30 and less than 90 degrees, and the fourth included angle θ is greater than the third included angle γ, so that the cross-sections of the first sub-hole 16211 and the second sub-hole 16221 form a continuous inverted trapezoidal or conical structure, reducing the scattering loss of light when passing through the black matrix 162, improving the light transmittance, and further enhancing the brightness and contrast of the display panel 1.

[0090] Please refer to Figure 1 、 Figure 2 、 Figure 3 、 Figure 7 、 Figures 8A to 8D ; wherein, Figure 7 is a flowchart of the manufacturing method of the display panel provided by the embodiment of the present application; Figures 8A to 8D is Figure 7 the structural process flowchart of the display panel manufacturing in

[0091] This embodiment provides a method for manufacturing a display panel 1. The method for manufacturing the display panel 1 includes:

[0092] Step S10: Provide a substrate 111, where the substrate 111 includes a first substrate, a spacer layer, and a second substrate that are sequentially stacked.

[0093] Step S20: Sequentially form a barrier layer 112, a driving circuit layer 113, a pixel definition layer 12, a light-emitting device layer 13, a packaging layer 14, and a touch control layer 15 on the substrate 111; as Figure 8A shown.

[0094] It should be noted that the structures of the barrier layer 112, the driving circuit layer 113, the pixel definition layer 12, the light-emitting device layer 13, the packaging layer 14, and the touch control layer 15 have been described in detail in the above embodiments and will not be repeated here.

[0095] Step S30: Form a black matrix 162 on a side of the touch control layer 15 away from the packaging layer 14, and perform patterning processing on the black matrix 162, and form a plurality of through holes 1620 on the black matrix 162; as Figure 8B shown.

[0096] Specifically, the black matrix 162 can be fabricated by a photolithography process.

[0097] Step S40: Form a plurality of color resist blocks 161 on the black matrix 162. One color resist block 161 is disposed in one through hole 1620, and the color resist block 161 covers at least a part of the black matrix 162, thereby forming a color filter layer 16.

[0098] Among them, the color resist blocks 161 include, but are not limited to, red color resist blocks 161, green color resist blocks 161, and blue color resist blocks 161. This embodiment does not specifically limit the arrangement manner of the red color resist blocks 161, the green color resist blocks 161, and the blue color resist blocks 161.

[0099] Specifically, the color resist blocks 161 can be fabricated by an inkjet printing method. The step S40 includes the following steps:

[0100] Step S41: Ink ejection stage: The inkjet print head ejects ink droplets of color resist materials of different colors to a target area. During the ejection process, the volume, speed, and direction of the ink droplets are strictly controlled to ensure deposition accuracy and stability; as Figure 8C shown.

[0101] Among them, the accuracy of the inkjet printing is ±7.5 micrometers; the color resist material includes, but is not limited to, one of UV ink (UV INK) or solvent ink (Solvent INK) to adapt to different manufacturing processes and application requirements; the color resist materials of different colors include red ink, green ink, and blue ink; among them, the volume of the ink droplet is greater than or equal to 1 picoliter and less than or equal to 3 picoliters; the diameter of the ink droplet is greater than 10 micrometers.

[0102] Step S42: Ink dropping stage: The ejected ink droplets fly along a ballistic trajectory in the air and accurately land on the target area according to the designed trajectory.

[0103] Step S43: Spreading stage: After the ink droplet lands on the target area, it spreads on the surface of the insulating layer 152 and inside the through hole 1620; among them, the viscosity of the ink droplet is greater than or equal to 5 centipoises and less than or equal to 20 centipoises; the surface tension of the ink droplet is greater than or equal to 10 mN / m and less than or equal to 40 mN / m; there is a first contact angle between the edge of the ink droplet and the surface of the black matrix 162 on the side away from the substrate 111, and the first contact angle is greater than or equal to 10 degrees and less than or equal to 40 degrees; the side of the ink droplet close to the substrate 111 is in contact with the insulating layer 152, and there is a second contact angle between the side of the ink droplet close to the substrate 111 and the surface of the insulating layer 152 on the side away from the substrate 111, and the second contact angle is less than or equal to 30 degrees, thereby improving the stability of the ink droplet deposition and the morphological control of the cured color resist block 161.

[0104] It can be understood that the spreading of the ink droplet is affected by its viscosity, surface tension, and the surface characteristics of the insulating layer 152. In this embodiment, by controlling the viscosity, surface tension, and the size of the contact angle of the ink droplet, uneven spreading, overflow, or breakage can be prevented.

[0105] Step S44: Curing stage: After the spreading is completed, the color resist block 161 is stably formed through an appropriate curing process; as Figure 8D shown.

[0106] Specifically, the curing method includes, but is not limited to, one of UV curing, thermal curing, and dual curing (combination of UV curing and thermal curing).

[0107] It can be understood that in the related art, both the black matrix and the color resist block are fabricated by photolithography processes. The black matrix and the color resist block need to go through multiple mask exposures, with high process complexity and low material utilization rate, which affects the yield of the display panel; compared with the prior art, in this embodiment, the color resist block is fabricated by an inkjet printing method, thereby simplifying the manufacturing process, improving the manufacturing efficiency; at the same time, the investment in the yellow light production line in the photolithography process is also reduced, thus reducing the production cost.

[0108] Step S50: A cover plate 17 is formed on the side of the color filter layer 16 away from the touch layer 15; as Figure 2 shown.

[0109] It should be noted that the structure of the cover plate 17 has been described in detail in the above embodiments, and will not be repeated here.

[0110] Please refer to Figure 9 , which is a schematic structural diagram of the display device provided by the embodiment of the present application.

[0111] This embodiment also provides a display device 2, and the display device 2 includes the display panel 1 described in any of the above embodiments; it can be understood that the display panel 1 has been described in detail in the above embodiments, and will not be repeated here.

[0112] The display device 2 may further include a middle frame 21, and the middle frame 21 is combined with the display panel 1 as a whole to provide support, fixation and protection for the display panel 1.

[0113] In specific applications, the display device 2 may be at least one of devices with a display function such as a smart phone, a tablet computer, a mobile phone, a video phone, an e-book reader, a desktop computer, a laptop computer, a netbook, a workstation, a server, a personal digital assistant, a portable media player, an MP3 player, a mobile medical device, a camera, a game console, a digital camera, a vehicle navigator, an electronic billboard, an automated teller machine or a wearable device, etc.

[0114] In the above embodiments, the descriptions of each embodiment have their own focuses. For the parts not detailed in a certain embodiment, reference may be made to the relevant descriptions of other embodiments.

[0115] The above has introduced in detail a display panel and a display device provided by the embodiments of the present application. Specific examples are used in this article to elaborate on the principle and implementation manner of the present application. The descriptions of the above embodiments are only used to help understand the technical solution and its core idea of the present application; those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A display panel, characterized in that, Comprising: A substrate; A color filter layer disposed on the substrate, the color filter layer including a plurality of color resist blocks and a black matrix, the black matrix having a plurality of through holes, one of the color resist blocks being disposed in one of the through holes, and the color resist block covering at least a portion of the black matrix; Wherein, the color resist block includes a curved surface on a side away from the substrate, the curved surface protruding away from the substrate, and there is a first included angle between an edge of the curved surface and a surface of the black matrix on a side away from the substrate, and the first included angle is an acute angle.

2. The display panel according to claim 1, wherein The color resist block includes a first color resist portion and a second color resist portion, the first color resist portion is disposed in the through hole, the second color resist portion is disposed on a side of the first color resist portion away from the substrate, and the curved surface is a surface of the second color resist portion on a side away from the substrate; Among the color resist block, the thickness of the first color resist portion, and the thickness of the second color resist portion, the following is satisfied: m < H3 ≤ H2 < H1 < n; Wherein, H1 is the thickness of the color resist block, H2 is the thickness of the second color resist portion, H3 is the thickness of the first color resist portion, m is 3 millimeters, and n is 10 millimeters.

3. The display panel according to claim 2, characterized in that, The through hole includes a first opening and a second opening disposed opposite to each other, and the second opening is located on a side of the first opening away from the substrate; Among the circumferential diameter of the first opening, the circumferential diameter of the second opening, the thickness of the second color resist portion, and the first included angle, the following is satisfied: tanα = (L2 - L1) / (2H2); Wherein, L1 is the circumferential diameter of the first opening, L2 is the circumferential diameter of the second opening, and α is the first included angle.

4. The display panel according to claim 3, wherein The first included angle is greater than 5 degrees and less than 90 degrees.

5. The display panel according to claim 3, wherein The circumferential diameter of the first opening is greater than 10 microns and less than 30 microns, and the circumferential diameter of the second opening is greater than 10 microns and less than 30 microns; Wherein, the circumferential diameter of the second opening is greater than the circumferential diameter of the first opening.

6. The display panel according to claim 3, wherein There is a second included angle between a side wall of the through hole and a surface of the black matrix on a side close to the substrate; Among the circumferential diameter of the first opening, the circumferential diameter of the second opening, the thickness of the first color resist portion, and the second included angle, the following is satisfied: L2 = L1 + 2H3tanβ; Wherein, β is the second included angle, and the second included angle is greater than 15 degrees and less than 90 degrees.

7. The display panel according to any one of claims 1 to 6, characterized in that, The black matrix includes a first black matrix portion and a second black matrix portion arranged in a stacked manner, the first black matrix portion having a plurality of first sub-holes, the second black matrix portion having a plurality of second sub-holes, and one of the second sub-holes corresponding to and communicating with one of the first sub-holes; Wherein, one of the color resist blocks fills one of the second sub-holes and one of the first sub-holes, and the color resist block covers at least a portion of the second black matrix portion.

8. The display panel according to claim 7, wherein The second black matrix portion includes a plurality of partition walls arranged at intervals, the height of the partition walls being greater than the height of the first black matrix portion, and the second sub-holes being provided between adjacent partition walls; Wherein, a third included angle is formed between the sidewall of the first sub-hole and the surface of the first black matrix portion close to the substrate side, the third included angle is greater than 15 degrees and less than 90 degrees; a fourth included angle is formed between the sidewall of the second sub-hole and the surface of the barrier rib close to the substrate side, the fourth included angle is greater than 30 degrees and less than 90 degrees, and the fourth included angle is greater than the third included angle.

9. The display panel according to any one of claims 1 to 6, characterized in that, Comprising: A pixel definition layer provided on one side of the substrate, and a plurality of first openings are formed in the pixel definition layer; A light-emitting device layer provided on the side of the pixel definition layer away from the substrate, the light-emitting device layer includes a plurality of light-emitting units, and one light-emitting unit is disposed in one of the first openings; A touch control layer provided on the side of the light-emitting device layer away from the pixel definition layer, the touch control layer includes a plurality of touch control traces that intersect horizontally and vertically; Wherein, the color filter layer is provided on the side of the touch control layer away from the light-emitting device layer, one color resistance block corresponds to one light-emitting unit in position, the orthographic projection of the color resistance block on the pixel definition layer covers the first opening, or the orthographic projection of the color resistance block on the touch control layer covers the touch control trace.

10. A display device, characterized in that, A display panel comprising the display panel according to any one of claims 1 to 9.

Images