Display panel and display device

Abstract

The invention discloses a display panel and a display device, and relates to the technical field of display. The display panel includes: a driving substrate; the anode metal layer is positioned on one side of the driving substrate and comprises a plurality of anode structures which are mutually insulated; the pixel definition layer is located on the side, away from the driving substrate, of the anode metal layer and comprises a plurality of opening structures corresponding to the anode structures; the light-emitting functional layer is filled in the opening structure, is in contact with the anode structure and covers the pixel definition layer; the color filter layer is located on the side, away from the driving substrate, of the light-emitting functional layer and comprises a plurality of filter structures corresponding to the anode structures; the micro-lens array layer is located on the side, away from the driving substrate, of the color filter layer and comprises a plurality of micro-lens structures corresponding to the anode structures; in the first display area of the display panel, the offset between the axis of the first anode structure and the axis of the opening structure is d1, the offset between the axis of the second anode structure and the axis of the opening structure is d2, and d1 is not equal to d2.

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] An organic light-emitting diode (OLED) display panel is applied to various display devices, especially near-eye display devices, due to its self-luminous, large variation range of luminance, rich color, low driving voltage, fast response speed, and low power consumption, and the like. With the development of display technology, the requirements for resolution, luminance, and color gamut of the display panel are becoming higher and higher.

[0003] At present, a microlens array is arranged in the display panel, and the light emission direction of the light-emitting device in the display panel is adjusted based on the light convergence effect of the microlens structure in the microlens array, so that more light reaches the display, thereby reducing light loss and improving display luminance and display resolution. However, when the display panel displays a picture, the light emission angle of the main light of the light-emitting device at different positions in the display panel has different requirements. If the light emission angles of the light-emitting devices at different positions in the display panel are the same, the picture display luminance of the display panel under the normal viewing angle or the side viewing angle will be affected, thereby affecting the display effect of the display panel. Therefore, how to meet the display luminance requirement under the corresponding viewing angle has become a technical problem to be solved at present. SUMMARY

[0004] The present application provides a display panel and a display device, which can meet the light emission angle requirements at different positions, improve the display effect of the display panel, reduce the production difficulty, improve the production yield, and reduce the production cost.

[0005] In a first aspect, the present application provides a display panel, comprising:

[0006] a driving substrate;

[0007] an anode metal layer located on one side of the driving substrate; the anode metal layer comprises a plurality of anode structures insulated from each other;

[0008] a pixel definition layer located on the side of the anode metal layer away from the driving substrate; the pixel definition layer comprises a plurality of opening structures corresponding to each anode structure;

[0009] a light-emitting functional layer at least filled in the opening structure and in contact with the anode structure;

[0010] a color filter layer located on the side of the light-emitting functional layer away from the driving substrate; the color filter layer comprises a plurality of filter structures corresponding to each anode structure.

[0011] A microlens array layer is located on the side of the color filter layer opposite to the driving substrate; the microlens array layer includes a plurality of microlens structures corresponding to each of the anode structures;

[0012] The display panel includes a display area, which includes a central display area and at least two first display areas located on opposite sides of the central display area; the anode structure of the first display area includes a first anode structure and a second anode structure located on the same side of the central display area, and the first anode structure is located on the side of the second anode structure away from the central display area;

[0013] Wherein, the offset between the axis of the first anode structure and the axis of the opening structure corresponding to the first anode structure is d1, the offset between the axis of the second anode structure and the axis of the opening structure corresponding to the second anode structure is d2, d1≠d2; the offset between the axis of the first anode structure and the axis of the microlens structure corresponding to the first anode structure is d3, the offset between the axis of the second anode structure and the axis of the microlens structure corresponding to the second anode structure is d4, d3=d4.

[0014] Optionally, the distance between the axes of two adjacent microlens structures is L1; the distance between the axes of two adjacent anode structures is L2; ​​wherein L1 and L2 are both fixed values.

[0015] Optionally, the offset between the axis of the first anode structure and the axis of the filter structure corresponding to the first anode structure is d5, and the offset between the axis of the second anode structure and the axis of the filter structure corresponding to the second anode structure is d6, where d5 = d6.

[0016] Optionally, the distance between the axes of two adjacent anode structures is L2, and the distance between the axes of two adjacent filter structures is L3; wherein, L2 and L3 are both fixed values.

[0017] Optionally, in the filter structure and the microlens structure corresponding to the same anode structure, the axis of the filter structure and the axis of the microlens structure are located on the same side of the axis of the anode structure.

[0018] Optionally, in the opening structure and the filter structure corresponding to the same anode structure, the intersection of the extension line of the axis of the opening structure and the side surface of the filter structure away from the driving substrate is the first intersection point; the intersection of the extension line of the axis of the microlens structure and the side surface of the microlens structure away from the driving substrate is the second intersection point.

[0019] In the first intersection point and the second intersection point corresponding to the same anode structure, the line connecting the first intersection point and the second intersection point is a first line segment; the angle between the first line segment and the axis of the microlens structure is the axis angle θ; wherein, in the first display area, 0° < θ ≤ 30°.

[0020] Optionally, in the central display area, 0°≤θ≤5°.

[0021] Optionally, the included angle θ of the axis gradually increases or decreases along the direction from the central display area to the first display area.

[0022] Optionally, the central display area includes a third anode structure and a fourth anode structure arranged along a first direction; the first direction is parallel to the direction from which the central display area points to the first display area.

[0023] The offset between the axis of the third anode structure and the axis of the opening structure corresponding to the third anode structure is d7, and the offset between the axis of the fourth anode structure and the axis of the opening structure corresponding to the fourth anode structure is d8, where d7 = d8.

[0024] Optionally, the first display area includes a first sub-display area and a second sub-display area located on opposite sides of the central display area;

[0025] In the first sub-display area, the direction from the axis of the microlens structure corresponding to the same anode structure to the axis of the opening structure is the positive direction of the first direction; in the second sub-display area, the direction from the axis of the microlens structure corresponding to the same anode structure to the axis of the opening structure is the negative direction of the first direction; the positive direction of the first direction is opposite to the negative direction of the first direction, and the first direction is parallel to the plane where the driving substrate is located.

[0026] In a second aspect, the present invention provides a display device, comprising: a display panel as described in the first aspect.

[0027] The technical solution of this invention includes a pixel definition layer comprising multiple opening structures corresponding to each anode structure, such that the light-emitting functional layer within the opening structure and the anode structure form a light-emitting device; and a microlens array layer comprising multiple microlens structures corresponding to each anode structure, such that the microlens structures can converge the light emitted from the light-emitting device, adjust the light emission direction of the light-emitting device, and improve the light emission brightness of the light-emitting device; simultaneously, in the first display area, in the first anode structure and the second anode structure at different distances from the central display area, the offset of the axis of the opening structure corresponding to the first anode structure relative to the axis of the first anode structure is set as d1, and the offset of the axis of the opening structure corresponding to the second anode structure relative to the axis of the second anode structure is set as d2, and d1≠d2, that is, the offset of the opening structure closer to the central display area is different from the offset of the opening structure farther from the central display area, so that the light emission center of the light-emitting device closer to the central display area is offset differently from the light emission center of the light-emitting device farther from the central display area, thereby, after the light passes through the microlens structure, the light emission center is closer to the center. The degree of light deflection emitted by the microlens structure in the display area to its corresponding light-emitting device differs from the degree of light deflection emitted by the microlens structure far from the center display area. This allows the light emitted near the center display area and the light emitted far from the center display area to have different light emission angles, thereby meeting the requirements for light emission angles at different locations, improving the display brightness of the display panel at corresponding viewing angles, and enhancing the display effect of the display panel. Furthermore, by setting the offset between the axis of the microlens structure corresponding to the first anode structure and the axis of the first anode structure to d3, and setting the offset between the axis of the microlens structure corresponding to the second anode structure and the axis of the second anode structure to d4, and d3=d4, that is, the offset of the microlens structure near the center display area and the offset of the microlens structure far from the center display area are the same, the etching process for the gaps of microlens structures with high aspect ratios can be simplified, which helps to reduce the difficulty of production control, improve production yield and production repeatability, and thus help to reduce the production cost of the display panel. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the film layer structure of a display panel based on related technologies;

[0029] Figure 2 This is a top view schematic diagram of a display panel structure provided in an embodiment of the present invention;

[0030] Figure 3 This is a schematic diagram of the film layer structure of a display panel provided in an embodiment of the present invention;

[0031] Figure 4This is a top view schematic diagram of another display panel structure provided in an embodiment of the present invention;

[0032] Figure 5 This is a schematic diagram of another film layer structure of a display panel provided in an embodiment of the present invention;

[0033] Figure 6 This is a schematic diagram of the film layer structure of another display panel provided in an embodiment of the present invention;

[0034] Figure 7 This is a schematic diagram of the film layer structure of another display panel provided in an embodiment of the present invention;

[0035] Figure 8 This is a schematic diagram of the film layer structure of another display panel provided in an embodiment of the present invention;

[0036] Figure 9 This is a schematic diagram of the structure of a display device provided in an embodiment of the present invention. Detailed Implementation

[0037] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0038] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the invention described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0039] Figure 1 This is a schematic diagram of the film layer structure of a display panel based on related technologies, such as... Figure 1In the aforementioned related technology, the display panel 001 may include a driving substrate 01 and a display functional layer 02. The display functional layer 02 may include an anode layer, a light-emitting functional layer, and a cathode layer, etc.; the anode layer may include multiple anode structures, the light-emitting functional layer may include light-emitting structures corresponding to each anode structure, and the cathode layer may include a cathode structure. The anode structures, light-emitting structures, and cathode structures together constitute a light-emitting device. The driving substrate 01 may include multiple pixel circuits, each of which can be electrically connected to a light-emitting device to drive the light-emitting device to display light emission. The light-emitting device may be a colored light-emitting device, for example, it may include a red light-emitting device, a green light-emitting device, and a blue light-emitting device, etc.; or, the light-emitting device may also be a white light-emitting device.

[0040] The display panel 001 may also include a color filter layer 03 and a microlens array layer 04. The color filter layer 03 may include filter structures corresponding to each light-emitting device. Different color filter structures can allow different colors of light to pass through while blocking other colors of light. The microlens array layer 04 may include multiple microlens structures 041. Each microlens structure 041 may be corresponding to each light-emitting device to converge the light emitted by the light-emitting device.

[0041] When displaying an image on the display panel 001, different requirements exist for the light emission angles of the light-emitting devices at different locations. For example, when a user is facing the display panel 001, the emitted light from the light-emitting devices on the display panel 001 needs to converge to the center area of ​​the display surface. This ensures that the light emitted from the light-emitting devices on both sides of the central display area of ​​the display panel is deflected towards the center area of ​​the display surface, guaranteeing that the user sees an image with high display brightness when facing the display panel 001. Therefore, controlling the deflection angle of the emitted light from the light-emitting devices at different locations has become a pressing technical problem that needs to be solved.

[0042] Currently, by changing the offset of the microlens structure 041 corresponding to the light-emitting device at different positions relative to the light-emitting device, the center angle (Chief Ray Angle, CRA) of the light-receiving cone angle of the microlens structure 041 at different positions is made different. This is to adjust the deflection angle when the light from the light-emitting device at different positions converges, so that the light emitted by the light-emitting device at each position can be directed toward the corresponding position. When the display panel is applied to a virtual reality device, such as VR glasses, the VR glasses also include an optical assembly for imaging. After the light emitted by the light-emitting device at each position is imaged by the optical assembly, the light emitted by the light-emitting device at each position that the user can see has a high display brightness. In the prior art, the gap between the microlens structure 041 at different positions and its adjacent microlens structure 041 is usually changed. For example, the gap between the first microlens structure 0411 and the second microlens structure 0412 is the first gap d01, and the gap between the second microlens structure 0412 and the third microlens structure 0413 is the second gap d02. The second gap d02 is smaller than the first gap d01, so that the third microlens structure 0413 and the light-emitting device of the third microlens structure 0413 can have a larger offset, the second microlens structure 0412 and the light-emitting device corresponding to the second microlens structure 0412 can have a smaller offset, and the first microlens structure 0411 and the light-emitting device corresponding to the first microlens structure 0411 can have an even smaller offset.

[0043] However, compared to the gap width between two adjacent microlens structures 041, the microlens structure 041 has a relatively high height. For example, the gap width between two adjacent microlens structures 041 is typically on the nanometer scale, while the height of the microlens structure 041 is typically on the micrometer scale, resulting in a high aspect ratio between the gaps between two adjacent microlens structures 041. When forming microlens structures using etching processes, the etching rate is significantly affected by the aspect ratio due to the significant loading effect of etching. This necessitates the use of high-precision etching processes to form the corresponding gaps in the microlens structures. Especially when the gaps in the microlens structures at different locations have different aspect ratios, production control becomes difficult, resulting in low production yield and poor repeatability, which is detrimental to the low cost of display panels.

[0044] To address the aforementioned technical problems, embodiments of the present invention provide a display panel. Figure 2 This is a top view schematic diagram of a display panel structure provided in an embodiment of the present invention. Figure 3 This is a schematic diagram of the film layer structure of a display panel provided in an embodiment of the present invention, for reference. Figure 2 and Figure 3As shown, the display panel 100 includes: a driving substrate 1; an anode metal layer 2 located on one side of the driving substrate 1; the anode metal layer 2 includes a plurality of mutually insulated anode structures 20; a pixel definition layer 3 located on the side of the anode metal layer 2 facing away from the driving substrate 1; the pixel definition layer 3 includes a plurality of opening structures 30 corresponding to each anode structure 20; a light-emitting functional layer 4, which is at least filled within the opening structures 30 and is in contact with the anode structures 20; a color filter layer 5 located on the side of the light-emitting functional layer 4 facing away from the driving substrate 1; the color filter layer 5 includes a plurality of filter structures 50 corresponding to each anode structure 20; and a microlens array layer 6 located on the side of the color filter layer 5 facing away from the driving substrate 1; the microlens array layer 6 includes a plurality of microlens structures 60 corresponding to each anode structure 20.

[0045] The display panel 100 may include, but is not limited to, an organic light-emitting diode (OLED) display panel, a micro OLED display panel, or a mini OLED display panel. The specific design can be tailored to actual needs, and this embodiment of the invention does not impose specific limitations on this. Taking an organic light-emitting diode (OLED) display panel 100 as an example, the light-emitting functional layer 4 may include a light-emitting layer, which is correspondingly filled within each of the opening structures 30. The display panel 100 may also include a cathode layer 7, which may include a cathode structure. The anode structure 20, the light-emitting layer, and the cathode structure constitute the light-emitting device P. Furthermore, the light-emitting functional layer 4 may also include at least one of a hole transport layer, a hole injection layer, and an electron blocking layer located between the light-emitting layer and the anode structure 20, and at least one of an electron transport layer, an electron injection layer, and a hole blocking layer located between the light-emitting layer and the cathode structure. The specific design can be tailored to actual needs, and this embodiment of the invention does not impose specific limitations on this.

[0046] It is understood that the light-emitting device can emit a single color or a combination of multiple colors. For example, the light-emitting device may include a red light-emitting device, a green light-emitting device, and a blue light-emitting device, or it may be a white light-emitting device. The light-emitting material of the light-emitting layer can be changed to achieve the corresponding light-emitting color. The specific design can be tailored to actual needs, and this embodiment of the invention does not impose specific limitations on this. For ease of description, unless otherwise specified, this embodiment of the invention uses a white light-emitting device as an example to illustrate the technical solution of the present invention.

[0047] Continue to refer to Figure 2 and Figure 3 The driving substrate 1 can be provided with multiple pixel circuits arranged in an array. Each pixel circuit can be electrically connected to each anode structure 20 to provide a corresponding driving signal to each anode structure 20, thereby driving the light-emitting device P to display light emission.

[0048] The color filter layer 5 may include filter structures 50 of different colors, such as red, blue, and green filter structures. The red filter structure allows red light to pass through while blocking other colors, the blue filter structure allows blue light to pass through while blocking other colors, and the green filter structure allows green light to pass through while blocking other colors. By setting different colored filter structures 50, the display panel can achieve color display, while preventing crosstalk between light emitted from light-emitting devices P at different locations, thus improving the display effect of the display panel.

[0049] The microlens structure of the microlens array layer 6 can converge the light emitted by the light-emitting device P and filtered by the lens structure 50, preventing the light emitted by the light-emitting device P from diverging and affecting the brightness of the light emitted by the light-emitting device P.

[0050] Continue to refer to Figure 2 and Figure 3 The display panel may also include a display area AA, which includes a central display area AA0 and at least two first display areas AA1 located on opposite sides of the central display area AA0.

[0051] The first display area AA1 is located at least on both sides opposite the central display area AA0. This can be understood as the first display area AA1 being located on both sides opposite the central display area AA0 (e.g., ...). Figure 2 (as shown), or, the first display area AA1 surrounds the central display area AA0 (as shown). Figure 4 (As shown). For ease of description, unless otherwise specified, the embodiments of the present invention will be illustrated by taking the example of the first display area AA1 being located on both sides opposite the central display area AA0, to illustrate the technical solutions of the embodiments of the present invention.

[0052] Understandably, if the light emitted from the light-emitting devices at various locations in the display area is converged by the microlens structure and the emitted light remains consistent, then when the user's viewing angle is directly facing the central display area, most of the light emitted by the light-emitting devices in the central display area can be seen by the user. However, the amount of light emitted by the light-emitting devices further away from the central display area in the first display area is less after being imaged by the optical assembly, resulting in a higher brightness of the display image in the central display area and a lower brightness of the image in the first display area further away from the central display area. Alternatively, when the user's viewing angle is directly facing the edge of the first display area, most of the light emitted by the light-emitting devices located at the edge of the first display area can be seen by the user after being imaged by the optical assembly. However, the amount of light emitted by the light-emitting devices further away from the edge of the first display area is less after being imaged by the optical assembly, resulting in a higher brightness of the display image corresponding to the edge of the first display area and a lower brightness of the image corresponding to the position further away from the edge of the first display area. This would affect the uniformity of the display panel's display and result in lower overall brightness, thus impacting the display effect. This invention addresses this by setting the offset of the opening structure relative to the anode structure to ensure the uniformity of the overall brightness of the image formed by the optical elements when viewed from a given viewing angle.

[0053] Continue to refer to Figure 2 and Figure 3 The anode structure 20 of the first display area AA1 includes a first anode structure 21 and a second anode structure 22 located on the same side of the central display area, and the first anode structure 21 is located on the side of the second anode structure 22 away from the central display area AA0.

[0054] It is understood that in this embodiment of the invention, the first anode structure and the second anode structure are located on the same side of the central display area, and the first anode structure is located on the side of the second anode structure away from the central display area. That is, in the first display area, any two anode structures arranged along the direction from the central display area to the first display area can be the first anode structure and the second anode structure, respectively. For example, in anode structure 21 and anode structure 22, the first anode structure is anode structure 21 and the second anode structure is anode structure 22; while in anode structure 22 and anode structure 23, the first anode structure is anode structure 22 and the second anode structure is anode structure 23. For ease of description, the following example uses anode structure 21 as the first anode structure and anode structure 22 as the second anode structure for illustrative purposes.

[0055] Continue to refer to Figure 2 and Figure 3The offset between the axis a1 of the first anode structure 21 and the axis b1 of the opening structure 31 corresponding to the first anode structure 21 is d1; the offset between the axis a2 of the second anode structure 22 and the axis b2 of the opening structure 32 corresponding to the second anode structure 22 is d2, and d1 ≠ d2; the offset between the axis a1 of the first anode structure 21 and the axis c1 of the microlens structure 61 corresponding to the first anode structure 21 is d3; the offset between the axis a2 of the second anode structure 22 and the axis c2 of the microlens structure 62 corresponding to the second anode structure 22 is d4, and d3 = d4.

[0056] It is understandable that the first anode structure 21 and the second anode structure 22 are both located on the same side of the central display area AA0. This ensures that when viewing the display screen 100 from the light emitted by each light-emitting device P in the display panel 100 through the optical assembly from the perspective of the central display area AA0, the main light rays emitted by the light-emitting device P1 of the first anode structure 21 and the main light rays emitted by the light-emitting device P2 of the second anode structure 22 should be deflected toward the side of the central display area AA0 after being converged by their corresponding microlens structures 60. This is to ensure that most of the light emitted by the light-emitting devices P1 and P2 can enter the optical assembly and be viewed by the user after being imaged by the optical assembly. Meanwhile, since the first anode structure 21 is located on the side of the second anode structure 22 away from the central display area AA0, the main light emitted by the light-emitting device P1 should have a large deflection angle after being converged by its corresponding microlens structure 61, while the main light emitted by the light-emitting device P2 can have a small deflection angle after being converged by its corresponding microlens structure 61. This ensures that the amount of light emitted by the light-emitting device P1 and the light emitted by the light-emitting device P2 entering the optical assembly is consistent. As a result, after the optical assembly images the light emitted by the light-emitting device P1 and the light emitted by the light-emitting device P2, the image at the corresponding position of the light-emitting device P1 and the light-emitting device P2 seen by the user can be consistent.

[0057] Wherein, d1≠d2, that is, d1 can be greater than or less than d2. This embodiment of the invention uses d1 greater than d2 as an example for explanation. d3=d4 can be understood as having a small difference between d3 and d4, which can be ignored. At the same time, both d3 and d4 can be values ​​close to 0, that is, the axes of the corresponding anode structure 20 and microlens structure 60 in the first display area AA1 are close to or coincide with each other. Specifically, the design can be made according to actual needs, and this embodiment of the invention does not impose specific limitations on this.

[0058] Specifically, since the offset between the axis a1 of the first anode structure 21 and the axis b1 of the opening structure 31 is d1, the offset between the axis a2 of the second anode structure 22 and the axis b2 of the opening structure 32 is d2, the offset between the axis a1 of the first anode structure 21 and the axis c1 of the microlens structure 61 is d3, and the offset between the axis a2 of the second anode structure 22 and the axis c2 of the microlens structure 62 is d4, and d1>d2 and d3=d4, the offset between the axis b1 of the opening structure 31 and the axis c1 of the microlens structure 61 can be greater than the offset between the axis b2 of the opening structure 32 and the axis c2 of the microlens structure 62. Meanwhile, the location of the opening structure 30 is usually the light-emitting area of ​​the light-emitting device P, so that the axis of the opening structure 30 is the optical axis of the main light ray of the light-emitting device P. When the offset between the axis b1 of the opening structure 31 and the axis c1 of the microlens structure 61 can be greater than the offset between the axis b2 of the opening structure 32 and the axis c2 of the microlens structure 62, if the deflection angle of the main light ray emitted from the light-emitting device P1 towards the central display area AA0 after being converged by the microlens structure 61 is the first deflection angle, and the deflection angle of the main light ray emitted from the light-emitting device P2 towards the central display area after being converged by the microlens structure 42 is the second deflection angle, then the first deflection angle should be greater than the second deflection angle. This ensures that the brightness of the light emitted from the light-emitting device P1 and the amount of light entering the optical assembly can be consistent when viewed from the central display area, so that the brightness of the image of the optical assembly viewed by the user is consistent, thereby improving the display uniformity of the display panel and thus improving the display effect of the display panel.

[0059] Accordingly, in the fabrication of a display panel, a driving substrate 1 is typically formed first; an anode metal layer 2 is deposited on the driving substrate 1 and etched to form an anode structure 20; after forming the anode structure 20, a pixel definition layer 3 is formed accordingly, and an opening structure 30 corresponding to the anode structure 20 is formed using photolithography and other processes, with the anode structure 20 as a reference; after forming the opening structure 30, a light-emitting functional layer 4 is formed using evaporation, deposition, and other processes to at least fill the opening structure 30; after forming the light-emitting functional layer 4, a color filter layer 5 can be formed using coating and other processes, and a filter structure 50 corresponding to the anode structure 20 is formed using photolithography and other processes, with the anode structure 20 as a reference; after forming the filter structure 50, a microlens array layer 6 is formed using coating and other processes, and a microlens structure 60 corresponding to the anode structure 20 is formed using photolithography and other processes, with the anode structure 20 as a reference.

[0060] The opening structure 30 defines the light-emitting area of ​​the light-emitting device P. The opening structure 30 has a certain width in the direction parallel to the plane of the driving substrate 1. Compared to the depth of the opening structure 30 in the direction perpendicular to the plane of the driving substrate 1, the width of the opening structure 30 is larger, resulting in a smaller aspect ratio. Therefore, when photolithography is performed on the pixel definition layer 3 with the anode structure 20 as a reference, and the opening structures 30 at different positions have different offsets, high photolithography precision is not required. This simplifies the fabrication process of the display panel 100, improves the production yield and repeatability of the display panel 100, and reduces the production cost of the display panel 100.

[0061] Meanwhile, by setting the offset d3 between the axis a1 of the first anode structure 21 and the axis c1 of the microlens structure 61 to be equal to the offset d4 between the axis a2 of the second anode structure 22 and the axis c2 of the microlens structure 62, that is, the offset of the microlens structure 60 near the central display area AA0 is the same as the offset of the microlens structure 60 far from the central display area AA0, or the axis of the microlens structure 60 in the first display area AA1 is not offset or has a small offset relative to the axis of its corresponding anode structure 20, the gap size d0 between two adjacent microlens structures 40 can be a fixed value, that is, the gap size between microlens structure 61 and microlens structure 62 is equal to the gap size between microlens structure 62 and microlens structure 63. This simplifies the etching process for the gap of the microlens structure 40 with a high aspect ratio, which helps to reduce the difficulty of production control, improve production yield and production repeatability, and thus help to reduce the production cost of the display panel.

[0062] It should be noted that the above description only uses d1 greater than d2 as an example to illustrate the technical solution of the present invention. In other embodiments of the present invention, such as... Figure 5 As shown, d1 can also be less than d2. Under the premise of meeting the display brightness requirements of the image formed by the light source under the corresponding viewing angle, the embodiments of the present invention do not make specific limitations in this regard.

[0063] In an alternative embodiment, such as Figure 3 As shown, the distance between the axes of two adjacent microlens structures 60 is L1; the distance between the axes of two adjacent anode structures 20 is L2; ​​where L1 and L2 are both fixed values.

[0064] It is understandable that L1 is a fixed value, meaning the distance between the axes of any two adjacent microlens structures 60 is L1, or approximately L1. This ensures that when all microlens structures 60 have the same shape and size, the gap between any two adjacent microlens structures 60 is a fixed value. Specifically, the gap between microlens structure 61 and microlens structure 62 is equal to the gap between microlens structure 62 and microlens structure 63. This guarantees that the gaps between all microlens structures 60 have the same or similar aspect ratio, simplifying the design of the microlens structures 60 and reducing the photolithography difficulty. Simultaneously, L2 is a fixed value, meaning the distance between the axes of any two adjacent anode structures 20 is L2, or approximately L2. This ensures that when all anode structures 20 have the same shape and size, the gap between any two adjacent anode structures 20 is a fixed value. Specifically, the gap between anode structure 21 and microanode structure 22 is equal to the gap between anode structure 22 and anode structure 23. This simplifies the design of the anode structure 20 and reduces the etching difficulty.

[0065] Furthermore, when L1 and L2 are both fixed values, when forming the microlens structure 60 of the microlens array layer 6, the mask used for photolithography of the microlens array layer 6 only needs to be aligned with the anode structure 20 as a reference, thereby simplifying the fabrication process of the microlens structure 60 in the microlens array layer 6, improving production yield, and reducing production costs.

[0066] Optional, continue to refer to Figure 3 The offset between the axis a1 of the first anode structure 21 and the axis e1 of the filter structure 51 corresponding to the first anode structure 21 is d5, and the offset between the axis a2 of the second anode structure 22 and the axis of the filter structure 52 corresponding to the second anode structure 22 is d6, where d5 = d6.

[0067] Wherein, d5=d6 can be understood as having a small difference between d5 and d6, which can be ignored. At the same time, both d5 ​​and d6 can be values ​​close to 0, that is, the axes of the corresponding anode structure 20 and the filter structure 50 in the first display area AA1 are close to or coincide with each other. The specific design can be made according to actual needs, and the embodiments of the present invention do not make specific limitations in this regard. In an optional embodiment, in the filter structure 50 and microlens structure 60 corresponding to the same anode structure 20, the axis of the filter structure 50 and the axis of the microlens structure 60 are located on the same side of the axis of the anode structure 20, so that the axes of the filter structure 50 and the microlens structure 60 corresponding to the same anode structure 20 have a relatively close distance, that is, the value of the distance between the corresponding axis of the microlens structure 60 and the axis of the filter structure 50 can be approximately 0, or the corresponding axis of the microlens structure 60 and the axis of the filter structure 50 coincide, so that the microlens structure 60 can converge the light passing through the filter structure 50, ensuring that the light passing through the filter structure 50 can be converged by the microlens structure 60 and emitted at the corresponding angle, thereby improving the display brightness of the display image after imaging by the optical assembly.

[0068] Meanwhile, by setting the offset d5 between the axis a1 of the first anode structure 21 and the axis e1 of the filter structure 51 to be equal to the offset d6 between the axis a2 of the second anode structure 22 and the axis e2 of the filter structure 52, that is, the offset of the filter structure 50 near the central display area AA0 is the same as the offset of the filter structure 50 far from the central display area AA0. Alternatively, the axes of the filter structure 50 and the microlens structure 60 in the first display area AA1 are not offset or have a small offset relative to the axis of their corresponding anode structure 20. For example, the axis e1 of the filter structure 51 is close to or coincides with the axis a1 of the anode structure 21, the axis e2 of the filter structure 52 is close to or coincides with the axis a2 of the anode structure 22, and the axis e3 of the filter structure 53 is close to or coincides with the axis a3 of the anode structure 23. This simplifies the etching process of each filter structure 50, helps reduce the difficulty of production control, improves production yield and production repeatability, and thus helps reduce the production cost of the display panel.

[0069] Optional, continue to refer to Figure 3 The distance between the axes of two adjacent anode structures 20 is L2, and the distance between the axes of two adjacent filter structures 50 is L3; where L2 and L3 are both fixed values.

[0070] It is understandable that L3 is a fixed value, meaning that the distance between the axes of any two adjacent filter structures 50 is L3, or approximately L3. For example, the distance between the axis e1 of filter structure 51 and the axis e2 of filter structure 52 is L3, and the distance between the axis e2 of filter structure 52 and the axis e3 of filter structure 53 is also L3. This simplifies the design of filter structures 50 when each filter structure 50 has the same shape and size. At the same time, L2 is a fixed value, meaning that the distance between the axes of any two adjacent anode structures 20 is L2, or approximately L2. This ensures that the gap between any two adjacent anode structures 20 is a fixed value when each anode structure 20 has the same shape and size. That is, the gap between anode structure 21 and microanode structure 22 is equal to the gap between anode structure 22 and anode structure 23. This simplifies the design of anode structure 20 and reduces the etching difficulty of anode structure 20.

[0071] Furthermore, when L3 and L2 are both fixed values, when forming the filter structure 50 of the color filter layer 5, the mask used for photolithography of the color filter layer 5 only needs to be aligned with the anode structure 20 as a reference, thereby simplifying the fabrication process of the filter structure 50 in the color filter layer 5, improving production yield, and reducing production costs.

[0072] Optional, Figure 6 This is a schematic diagram of the film layer structure of another display panel provided in an embodiment of the present invention, for reference. Figure 6 As shown, in the opening structure 30 and the filter structure 50 corresponding to the same anode structure 20, the intersection of the extension line of the axis of the opening structure 30 and the side surface of the filter structure 50 away from the driving substrate 1 is the first intersection point; the intersection of the extension line of the axis of the microlens structure 60 and the side surface of the microlens structure 60 away from the driving substrate 1 is the second intersection point; in the first intersection point and the second intersection point corresponding to the same anode structure 20, the line connecting the first intersection point and the second intersection point is the first line segment; the angle between the first line segment and the axis of the microlens structure 60 is the axial angle θ; wherein, in the first display area, 0° < θ ≤ 30°.

[0073] Specifically, the axis of the opening structure 30 is the optical axis of the main light ray of the light-emitting device P defined by the opening structure 30. By setting the range of the angle θ between the axes of each light-emitting device P in the first display area to 0° < θ ≤ 30°, the deflection angle of the main light ray of each light-emitting device P in the first display area after passing through the filter structure 50 and being converged by the microlens structure 60 is within a specific angle range. This ensures that the main light ray emitted from each light-emitting device P in the first display area enters the optical assembly and can be viewed by the user at the corresponding viewing angle after being imaged by the optical assembly. This is beneficial to improving the display uniformity and display brightness of the image of the optical assembly viewed by the user at the corresponding viewing angle.

[0074] In an alternative embodiment, reference continues. Figure 6 Along the direction X1 from the central display area to the first display area, the included angle θ of the axis gradually increases. For example, when the anode structure 21 is located on the side of the anode structure 22 away from the central display area, and the anode structure 22 is located on the side of the anode structure 23 away from the central display area, the included angle of the axis corresponding to the light-emitting device P1 defined by the opening structure 31 is θ1, the included angle of the axis corresponding to the light-emitting device P2 defined by the opening structure 32 is θ2, and the included angle of the axis corresponding to the light-emitting device P3 defined by the opening structure 33 is θ3. At this time, θ1 is greater than θ2, and θ2 is greater than θ3. At this time, the light emitted from the light-emitting device P1 passes through the light filtering structure 51 and is converged by the microlens structure 61, resulting in a larger deflection angle. The light emitted from the light-emitting device P2 passes through the light filtering structure 52 and is converged by the microlens structure 62, resulting in a smaller deflection angle. The light emitted from the light-emitting device P3 passes through the light filtering structure 53 and is converged by the microlens structure 63, resulting in an even smaller deflection angle. This configuration allows the main rays of the light-emitting devices P, which are farther away from the central display area, to have a larger deflection angle, while the main rays of the light-emitting devices P, which are closer to the central display area, have a smaller deflection angle. This ensures that the amount of light entering the optical array from each light-emitting device P remains consistent when viewed directly from the central display area, thereby improving the uniformity of the displayed image after imaging by the optical array.

[0075] In another alternative embodiment, such as Figure 7 As shown, along the direction X1 from the central display area to the first display area, the included angle θ of the axis gradually decreases. For example, when the anode structure 21 is located on the side of the anode structure 22 away from the central display area, and the anode structure 22 is located on the side of the anode structure 23 away from the central display area, the included angle of the axis corresponding to the light-emitting device P1 defined by the opening structure 31 is θ1, the included angle of the axis corresponding to the light-emitting device P2 defined by the opening structure 32 is θ2, and the included angle of the axis corresponding to the light-emitting device P3 defined by the opening structure 33 is θ3. At this time, θ1 is less than θ2, and θ2 is less than θ3. At this time, the light emitted from the light-emitting device P1 passes through the light filtering structure 51 and is converged by the microlens structure 61, resulting in a small deflection angle. The light emitted from the light-emitting device P2 passes through the light filtering structure 52 and is converged by the microlens structure 62, resulting in a large deflection angle. The light emitted from the light-emitting device P3 passes through the light filtering structure 53 and is converged by the microlens structure 63, resulting in an even larger deflection angle. This configuration allows the main rays of the light-emitting device P, which is farther from the central display area, to have a smaller deflection angle, while the main rays of the light-emitting device P, which is closer to the central display area, have a larger deflection angle. As a result, the light emitted from each light-emitting device P can diverge in the direction from the central display area toward the first display area, thus ensuring the uniformity of the displayed image after the optical components are formed when viewed from the side of the first display area that is farther from the central display area.

[0076] It is understood that, under the requirements of different viewing angles, the included angles of the axes corresponding to each light-emitting device in the first display area can be set with different variation rules. The specific design can be tailored to actual needs, and this embodiment of the invention does not impose specific limitations on this. For ease of description, unless otherwise specified, this embodiment of the invention uses the example of the included angles of each axis gradually increasing along the direction from the central display area to the first display area to illustrate the technical solution of this embodiment of the invention.

[0077] Optional, Figure 8 This is a schematic diagram of the film layer structure of another display panel provided in an embodiment of the present invention, for reference. Figure 2 and Figure 8 The central display area AA0 includes a third anode structure 230 and a fourth anode structure 240 arranged along the first direction X; the first direction X is parallel to the direction from the central display area AA0 to the first display area AA1; the offset between the axis a30 of the third anode structure 230 and the axis b30 of the opening structure 330 corresponding to the third anode structure 230 is d7, and the offset between the axis of the fourth anode structure 240 and the axis of the opening structure 340 corresponding to the fourth anode structure 240 is d8, where d7 = d8.

[0078] Wherein, d7=d8 can be understood as having a small difference between d7 and d8, and this difference can be ignored. At the same time, both d7 and d8 can be values ​​close to 0, that is, the axes of the corresponding anode structure 20 and the opening structure 30 in the central display area AA0 are close to or coincide with each other. The specific design can be made according to actual needs, and the embodiments of the present invention do not make specific limitations in this regard.

[0079] Accordingly, in the central display area AA0, the axes of the microlens structure 630 and the filter structure 530 corresponding to the third anode structure 230 can coincide with or be close to the axis of the third anode structure 230, and the axes of the microlens structure 640 and the filter structure 540 corresponding to the fourth anode structure 240 can coincide with or be close to the axis of the fourth anode structure 240. Thus, in the central display area AA0, the axes of the opening structure 30, the microlens structure 640, and the filter structure 540 corresponding to the same anode structure 20 can coincide with or be close to each other.

[0080] Furthermore, since the third opening structure 330 can define the light-emitting area of ​​the light-emitting device P30 belonging to the third anode structure 230, the fourth opening structure 340 can define the light-emitting area of ​​the light-emitting device P40 belonging to the fourth anode structure 240. The light emitted from the light-emitting device P30 can pass through the filter structure 530 and be converged by the microlens structure 630, while the light emitted from the light-emitting device P40 can pass through the filter structure 540 and be converged by the microlens structure 640. By aligning or bringing the axes of the opening structure 30, the microlens structure 640, and the filter structure 540 corresponding to the same anode structure 20 in the central display area AA0 close together, the deflection angle of the main light emitted from the light-emitting device P30 after being converged by the microlens structure 630 is consistent with that of the main light emitted from the light-emitting device P40 after being converged by the microlens structure 640. In other words, the optical axes of the main light rays emitted from each light-emitting device P to the display surface in the central display area AA0 are consistent. This ensures that, from a viewing angle directly facing the central display area AA0, the displayed brightness of the image from the optical assembly is consistent with the brightness of the images corresponding to the light-emitting devices P at various positions in the central display area AA0, thus improving the uniformity of the image from the optical assembly.

[0081] In an optional embodiment, when the included angle of the axis corresponding to the light-emitting device P is θ, the range of the included angle θ in the central display area AA0 can be: 0°≤θ≤5°. This setting allows the included angles θ of each axis in the central display area AA0 to vary within a small range, thereby ensuring that the optical axis of the main light emitted from each light-emitting device P has a small deflection angle. This results in a higher display brightness of the image formed by the optical assembly when viewed from the perspective of the central display area AA0, thus improving the display effect of the display panel 100.

[0082] Optional, continue to refer to Figure 2 and Figure 8 The first display area AA1 includes a first sub-display area AA11 and a second sub-display area AA12 located on both sides opposite to the central display area AA0. In the first sub-display area AA11, the direction in which the axis of the microlens structure 60 corresponding to the same anode structure 20 points to the axis of the opening structure 30 is the positive direction of the first direction X. In the second sub-display area AA12, the direction in which the axis of the microlens structure 60 corresponding to the same anode structure 20 points to the axis of the opening structure 30 is the negative direction of the first direction X. The positive direction of the first direction X is opposite to the negative direction of the first direction X, and the first direction X is parallel to the plane where the driving substrate 1 is located.

[0083] The alignment of the axis of the microlens structure 60 corresponding to the same anode structure 20 with the axis of the opening structure 30 can control the deflection direction of the main light emitted by the light-emitting device P to which the anode structure 20 belongs. For example, in the first sub-display area AA11, the axis c11 of the microlens structure 611 corresponding to the anode structure 211 and the axis e11 of the filter structure 511 are located on the side of the axis b11 of the opening structure 311 corresponding to the anode structure 211 closer to the central display area AA0, and the axis c21 of the microlens structure 621 corresponding to the anode structure 221 and the axis e21 of the filter structure 521 are located on the side of the axis b21 of the opening structure 321 corresponding to the anode structure 221 closer to the central display area AA0, so that the main light emitted by the light-emitting device P11 to which the anode structure 211 belongs and the light-emitting device P21 to which the anode structure 221 belongs are respectively converged by their respective corresponding microlens structures 60 (611 and 621) and deflected toward the side of the central display area AA0; Similarly, in the second sub-display area AA12, the axis c12 of the microlens structure 612 corresponding to the anode structure 212 and the axis e12 of the filter structure 512 are located on the side of the axis b12 of the opening structure 312 corresponding to the anode structure 212 that is close to the central display area AA0. The axis c22 of the microlens structure 622 corresponding to the anode structure 222 and the axis e22 of the filter structure 522 are located on the side of the axis b22 of the opening structure 322 corresponding to the anode structure 222 that is close to the central display area AA0. This causes the main light rays emitted from the light-emitting device P12 of the anode structure 212 and the light-emitting device P22 of the anode structure 222 to be converged by their respective corresponding microlens structures 60 (612 and 622) and deflected toward the side of the central display area AA0. Thus, the optical axes of the main rays emitted by the light-emitting devices of the first sub-display area AA11 and the second sub-display area AA12 are both deflected toward the side of the central display area AA0. As a result, the images of the optical array viewed from the perspective of the central display area AA0 have high display brightness, which helps to improve the display uniformity of the display panel 100 and thus improve the display effect of the display panel 100.

[0084] Based on the above embodiments, optionally, such as Figure 8 As shown, the display panel may also include an encapsulation layer 8, which may cover each light-emitting device P. The encapsulation layer 160 may include at least one organic layer and at least one inorganic layer; the organic layer and the inorganic layer are alternately stacked.

[0085] The encapsulation layer 8 can prevent water, mist or impurities in the outside air from entering the light-emitting device 8 and damaging the structure of the light-emitting device 8, thereby improving the service life of the light-emitting device 8. The encapsulation layer 8 can be a thin film encapsulation layer, such as a multi-layer stacked encapsulation structure including an inorganic layer-organic layer-inorganic layer. The inorganic layer prevents water or mist from entering, and the organic layer absorbs the impurities that enter, thus ensuring the encapsulation effect.

[0086] Based on the same inventive concept, the present invention provides a display device, which includes a display panel according to any embodiment of the present invention. Therefore, the display device has the technical features and beneficial effects of the display panel provided in the embodiments of the present invention. The similarities can be referred to the above description, and will not be repeated here.

[0087] For example, Figure 9 This is a schematic diagram of the structure of a display device provided in an embodiment of the present invention, such as... Figure 9 As shown, the display device 200 can be VR glasses, and the lenses of the VR glasses include the display panel 100 in this embodiment of the invention. In other embodiments, the display device 200 can also be other microdisplay devices, which are not specifically limited here.

[0088] Since the display device provided in the embodiments of the present invention includes the display panel provided in any embodiment of the present invention, the display device provided in the embodiments of the present invention includes the corresponding functional modules of the display panel, and can achieve the beneficial effects of the display panel provided in the embodiments of the present invention. Technical details not described in detail in the above embodiments can be found in the above description of the display panel provided in the embodiments of the present invention.

[0089] The specific embodiments described above do not constitute a limitation on the scope of protection of this invention. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this invention should be included within the scope of protection of this invention.

Claims

1. A display panel, characterized in that, include: Drive substrate; An anode metal layer is located on one side of the driving substrate; the anode metal layer includes a plurality of mutually insulated anode structures; A pixel definition layer is located on the side of the anode metal layer facing away from the driving substrate; the pixel definition layer includes a plurality of opening structures corresponding to each of the anode structures; A light-emitting functional layer is at least filled within the opening structure and is in contact with the anode structure; A color filter layer is located on the side of the light-emitting functional layer opposite to the driving substrate; the color filter layer includes multiple filter structures corresponding to each of the anode structures; A microlens array layer is located on the side of the color filter layer opposite to the driving substrate; the microlens array layer includes a plurality of microlens structures corresponding to each of the anode structures; The display panel includes a display area, which includes a central display area and at least two first display areas located on opposite sides of the central display area; the anode structure of the first display area includes a first anode structure and a second anode structure located on the same side of the central display area, and the first anode structure is located on the side of the second anode structure away from the central display area; Wherein, the offset between the axis of the first anode structure and the axis of the opening structure corresponding to the first anode structure is d1, and the offset between the axis of the second anode structure and the axis of the opening structure corresponding to the second anode structure is d2, d1≠d2; The offset between the axis of the first anode structure and the axis of the microlens structure corresponding to the first anode structure is d3, and the offset between the axis of the second anode structure and the axis of the microlens structure corresponding to the second anode structure is d4, where d3 = d4.

2. The display panel according to claim 1, characterized in that, The distance between the axes of two adjacent microlens structures is L1; the distance between the axes of two adjacent anode structures is L2; ​​where L1 and L2 are both fixed values.

3. The display panel according to claim 1, characterized in that, The offset between the axis of the first anode structure and the axis of the filter structure corresponding to the first anode structure is d5, and the offset between the axis of the second anode structure and the axis of the filter structure corresponding to the second anode structure is d6, where d5 = d6.

4. The display panel according to claim 1, characterized in that, The distance between the axes of two adjacent anode structures is L2, and the distance between the axes of two adjacent filter structures is L3; wherein, L2 and L3 are both fixed values.

5. The display panel according to claim 1, characterized in that, In the filter structure and the microlens structure corresponding to the same anode structure, the axis of the filter structure and the axis of the microlens structure are located on the same side of the axis of the anode structure.

6. The display panel according to claim 1, characterized in that, In the opening structure and the filter structure corresponding to the same anode structure, the intersection point of the extension line of the axis of the opening structure and the side surface of the filter structure facing away from the driving substrate is the first intersection point; The intersection of the extension of the axis of the microlens structure with the surface of the microlens structure facing away from the driving substrate is the second intersection point. In the first intersection point and the second intersection point corresponding to the same anode structure, the line connecting the first intersection point and the second intersection point is a first line segment; the angle between the first line segment and the axis of the microlens structure is the axis angle θ; wherein, in the first display area, 0° < θ ≤ 30°.

7. The display panel according to claim 6, characterized in that, In the central display area, 0°≤θ≤5°.

8. The display panel according to claim 6, characterized in that, Along the direction from the central display area to the first display area, the included angle θ of the axis gradually increases or decreases.

9. The display panel according to claim 1, characterized in that, The central display area includes a third anode structure and a fourth anode structure arranged along a first direction; the first direction is parallel to the direction in which the central display area points to the first display area. The offset between the axis of the third anode structure and the axis of the opening structure corresponding to the third anode structure is d7, and the offset between the axis of the fourth anode structure and the axis of the opening structure corresponding to the fourth anode structure is d8, where d7 = d8.

10. The display panel according to claim 1, characterized in that, The first display area includes a first sub-display area and a second sub-display area located on opposite sides of the central display area; In the first sub-display area, the direction from the axis of the microlens structure corresponding to the same anode structure to the axis of the opening structure is the positive direction of the first direction; in the second sub-display area, the direction from the axis of the microlens structure corresponding to the same anode structure to the axis of the opening structure is the negative direction of the first direction; the positive direction of the first direction is opposite to the negative direction of the first direction, and the first direction is parallel to the plane where the driving substrate is located.

11. A display device, characterized in that, include: The display panel according to any one of claims 1-10.

Images