Display panel and display device

Abstract

The invention provides a display panel and a display device. The display panel comprises a substrate, a light emitting structure layer, a light barrier layer and a pixel defining layer. Wherein the light-emitting structure layer is located on one side of the substrate, and the light-emitting structure layer comprises a plurality of peep-proof sub-pixels. The light blocking layer and the light-emitting structure layer are located on the same side of the substrate, the light blocking layer comprises at least one light blocking structure, and each light blocking structure surrounds the light-emitting area of one peep-proof sub-pixel and is used for blocking part of light emitted by the peep-proof sub-pixel. The pixel limiting layer is located on the side, away from the substrate, of the light blocking structure and covers the light blocking structure. The pixel limiting layer is provided with a plurality of pixel openings, and each peep-proof sub-pixel is at least partially located in one pixel opening. The display device comprises the display panel.

Description

Technical Field

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

[0002] OLED (Organic Light-Emitting Diode) technology is a self-luminous display technology based on organic materials. OLED has the characteristics of high contrast, fast response speed, wide viewing angle, low energy consumption and support for flexible display.

[0003] In modern car designs, a display screen is installed on the passenger seat to enhance the passenger's entertainment experience, but the light or display content emitted by the passenger screen may affect the driver's field of vision or attract the driver's attention, thereby affecting driving safety. Summary of the invention

[0004] The present application provides a display panel and a display device.

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

[0006] substrate;

[0007] A light-emitting structure layer is located on one side of the substrate; the light-emitting structure layer includes a plurality of anti-peeping sub-pixels;

[0008] A light blocking layer is located on the same side of the substrate as the light emitting structure layer; the light blocking layer includes at least one light blocking structure, each of which surrounds a light emitting area of ​​the anti-peeping sub-pixel and is used to block part of the light emitted by the anti-peeping sub-pixel;

[0009] The pixel defining layer is located on a side of the light blocking structure away from the substrate and covers the light blocking structure; the pixel defining layer is provided with a plurality of pixel openings, and each of the anti-peep sub-pixels is at least partially located in one of the pixel openings.

[0010] In one embodiment, the light blocking structure is made of a reflective material.

[0011] In one embodiment, the display panel further comprises at least one protruding structure located on the side of the substrate facing the light emitting structure layer, each of the protruding structures surrounds a light emitting area of ​​the anti-peeping sub-pixel; and the light blocking structure is at least arranged on the inner side of the protruding structure.

[0012] In one embodiment, the display panel further includes a planarization layer located between the substrate and the protruding structure, and the protruding structure is in contact with the planarization layer; and a material of the protruding structure is the same as a material of the planarization layer.

[0013] In one embodiment, the anti-peeping sub-pixel includes a first electrode, a light-emitting material layer, and a second electrode; the light-emitting material layer is located on a side of the first electrode away from the substrate; the second electrode is located on a side of the light-emitting material layer away from the substrate;

[0014] The first electrode is disposed in the same layer as the light blocking structure.

[0015] In one embodiment, the light blocking structure and the first electrode are an integral structure.

[0016] In one embodiment, in the direction from the substrate to the light emitting structure layer, the cross-sectional area of ​​the cavity enclosed by the light blocking structure gradually increases.

[0017] In one embodiment, the side surface of the pixel opening includes a first sub-side surface, a first plane, and a second sub-side surface connected in sequence, the first sub-side surface is located on a side of the first plane facing the substrate, and an orthographic projection of the second sub-side surface on the substrate is located outside an orthographic projection of the first sub-side surface on the substrate;

[0018] The distance from the surface of the light blocking layer away from the substrate to the substrate is greater than the distance from the first plane to the substrate.

[0019] In one embodiment, the distance from the bottom surface of the pixel opening to the substrate is greater than or equal to the distance from the side of the light blocking structure facing the substrate to the substrate.

[0020] In one embodiment, the material of the light blocking structure is a light absorbing material.

[0021] In one embodiment, the display panel further includes at least one light-shielding layer located on a side of the light-emitting structure layer away from the substrate, each of the light-shielding layers being provided with a plurality of through holes, and an orthographic projection of each of the through holes on the substrate at least partially overlapping with an orthographic projection of a light-emitting area of ​​the anti-peep sub-pixel on the substrate.

[0022] In one embodiment, in the direction from the substrate to the light emitting structure layer, the height of the light blocking layer ranges from 1 μm to 4.5 μm.

[0023] In one embodiment, the display panel further includes a plurality of shared sub-pixels.

[0024] A second aspect of the present application provides a display device, which includes the above-mentioned display panel.

[0025] The display panel of the present application has a light blocking structure that can block part of the light emitted by the anti-peeping sub-pixel, reduce the light emitted from the anti-peeping sub-pixel at a larger emission angle, ensure that most of the light emitted by the display panel is normal-angle light with a smaller emission angle, and enhance the anti-peeping effect of the display panel; when the display panel is used for an in-vehicle display for the co-pilot of a car, it can improve the problem of the light from the display panel with a large emission angle entering the driver's field of vision and interfering with the driver, thereby improving driving safety.

[0026] It should be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0028] Figure 1 A schematic diagram of the structure of a display panel provided in one embodiment of the present application;

[0029] Figure 2 A schematic diagram of the structure of a display panel provided in another embodiment of the present application;

[0030] Figure 3 A schematic diagram of the structure of a display panel provided in yet another embodiment of the present application;

[0031] Figure 4 A schematic diagram of pixel arrangement of a display panel provided in an embodiment of the present application;

[0032] Figures 5 to 10 A schematic flow chart of a method for preparing a display panel provided in one embodiment of the present application. DETAILED DESCRIPTION

[0033] Here, the technical solutions in the embodiments (or "implementations") of the present application will be described clearly and completely in conjunction with the accompanying drawings. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements.

[0034] If there are terms involving directional indications or positional relationships in the embodiments of the present application (such as up, down, left, right, front, back, inside, outside, top, bottom, center, vertical, horizontal, longitudinal, transverse, length, width, counterclockwise, clockwise, axial, radial, circumferential, etc.), such terms are only used to explain the relative positional relationship, movement, etc. between the components under a certain specific posture (as shown in the accompanying drawings); if the specific posture changes, the directional indication or positional relationship will also change accordingly. In addition, the terms "first", "second", etc. involved in the embodiments of the present application are only used for the purpose of convenience of description and cannot be understood as indicating or implying relative importance.

[0035] The display panel of the embodiment of the present application is described in detail below in conjunction with the accompanying drawings. In the absence of conflict, the features of the following embodiments and implementations can complement or be combined with each other.

[0036] The embodiment of the present application provides a display panel, such as Figure 1 As shown, the display panel includes a substrate 10, a light emitting structure layer 20, a light blocking layer 30 and a pixel defining layer 60. The light emitting structure layer 20 is located on one side of the substrate 10, and the light emitting structure layer 20 includes a plurality of sub-pixels 21, and the plurality of sub-pixels 21 include a plurality of anti-peeping sub-pixels 21a. The light blocking layer 30 and the light emitting structure layer 20 are located on the same side of the substrate 10, and the light blocking layer 30 includes at least one light blocking structure 31, each of which surrounds the light emitting area of ​​one of the anti-peeping sub-pixels 21a, and is used to block part of the light emitted by the anti-peeping sub-pixel 21a. The pixel defining layer 60 is located on the side of the light blocking structure 31 away from the substrate 10, and covers the light blocking structure 31. The pixel defining layer 60 is provided with a plurality of pixel openings 61, and each of the anti-peeping sub-pixels 21a is at least partially located in one of the pixel openings 61.

[0037] Installing a display screen on the passenger seat of a vehicle can meet the entertainment needs of the passenger. The passenger can also control the vehicle's air conditioning, audio, etc. through the passenger screen, reducing the burden on the driver. However, the light from the side of the passenger screen may directly shine into the driver's eyes, blocking the driver's vision. The content displayed on the passenger screen may also attract the driver's attention, thus affecting driving safety.

[0038] The light blocking structure 31 of the display panel of the present application can block part of the light emitted by the anti-peeping sub-pixel 21a, reduce the light emitted from the display panel at a larger angle, and ensure that most of the light emitted by the anti-peeping sub-pixel is normal-angle light with a smaller exit angle, so that the front passenger can clearly see the content displayed on the front passenger screen. At the same time, it can improve the problem of light with a large exit angle entering the driver's field of vision and interfering with the driver, thereby improving driving safety.

[0039] In one embodiment, Figure 1 As shown, the substrate 10 may be a flexible substrate or a rigid substrate. The material of the flexible substrate may include one or more of polyimide, polyethylene terephthalate, polycarbonate, and organic resin materials, and the organic resin material may include epoxy resin, triazine, silicone resin, or polyimide. The rigid substrate includes any one of a glass substrate, a quartz substrate, a sapphire substrate, and the like.

[0040] In one embodiment, Figure 1 As shown, each sub-pixel 21 of the light emitting structure layer 20 includes a first electrode 211, a light emitting material layer 212 located on the side of the first electrode 211 away from the substrate 10, and a second electrode 213 located on the side of the light emitting material layer 212 away from the substrate 10. One of the first electrode 211 and the second electrode 213 is an anode, and the other is a cathode. In some embodiments, the first electrode 211 is an anode, the second electrode 213 is a cathode, the cathode is a common electrode, and the cathodes of all sub-pixels 21 are connected to form a surface electrode. In some embodiments, the light emitting material layer 212 is an organic light emitting material layer.

[0041] In one embodiment, Figure 1 As shown, the display panel further includes a driving circuit layer located between the substrate 10 and the light emitting structure layer 20 and a buffer layer 51 located between the substrate 10 and the driving circuit layer. The driving circuit layer includes a plurality of pixel circuits, and the pixel circuits are used to drive the sub-pixels 21. The pixel circuits may correspond to the sub-pixels 21 one by one, and each pixel circuit is used to drive the corresponding sub-pixel 21.

[0042] In one embodiment, Figure 1 As shown, the pixel circuit includes a thin film transistor 41. The thin film transistor 41 may include an active layer 411, a gate 412, a first electrode 413 and a second electrode 414. One of the first electrode 413 and the second electrode 414 is a source electrode, and the other is a drain electrode. The pixel circuit may also include a capacitor 42, and the capacitor 42 includes a first capacitor plate 421 and a second capacitor plate 422 located on the side of the first capacitor plate 421 away from the substrate 10. The pixel circuit layer may also include a plurality of signal lines, such as a scan signal line, a data signal line, a power signal line, etc.

[0043] In one embodiment, Figure 1As shown, the gate 412 is located on the side of the active layer 411 away from the substrate 10, and the first pole 413 and the second pole 414 are located in the same layer and are located on the side of the gate 412 away from the substrate 10. The driving circuit layer also includes a gate insulating layer 52, a capacitor insulating layer 53, an interlayer dielectric layer 54, a first planarization layer 55, a second planarization layer 56 and a connecting portion 43. Among them, the gate insulating layer 52 is located between the active layer 411 and the gate electrode 412, the capacitor insulating layer 53 is located between the first capacitor plate 421 and the second capacitor plate 422, the interlayer dielectric layer 54 is located between the second capacitor plate 422 and the first planarization layer 55, and the connecting portion 43 is located between the first planarization layer 55 and the second planarization layer 56, and is electrically connected to the second pole 414 through a through hole penetrating the first planarization layer 55. A portion of the first electrode 413 and the second electrode 414 is located between the interlayer dielectric layer 54 and the first planarization layer 55, and the other portion is electrically connected to the active layer 411 through a through hole penetrating the interlayer dielectric layer 54, the capacitor insulating layer 53, and the gate insulating layer 52. The first planarization layer 55 and the second planarization layer 56 can improve the flatness of the surface of the driving circuit layer away from the substrate 10, and can improve the quality of the film layer subsequently manufactured.

[0044] In one embodiment, Figure 1 As shown, the sub-pixel 21 of the light-emitting structure layer 20 includes an anti-peeping sub-pixel 21a and a shared sub-pixel 21b. The shared sub-pixel 21b is at least partially located in the pixel opening. The shared sub-pixel 21b is spaced apart from the anti-peeping sub-pixel 21a, and the light blocking structure is only arranged around the anti-peeping sub-pixel 21a. The display panel includes a shared display mode and an anti-peeping display mode. In the shared display mode, the shared sub-pixel 21b and the anti-peeping sub-pixel 21a work at the same time, or only the shared sub-pixel 21b works. At this time, the large viewing angle light emitted by the shared sub-pixel 21b will not be blocked, so the image displayed by the display panel can be observed from multiple angles. In the anti-peeping display mode, only the anti-peeping sub-pixel 21a works, and part of the light emitted by the anti-peeping sub-pixel 21a is blocked by the light blocking structure. Therefore, in the anti-peeping display mode, the displayed image can only be observed from the front of the display panel, and the displayed image cannot be seen from the side of the display panel.

[0045] exist Figure 4In the illustrated embodiment, the light emitting structure layer 20 includes a plurality of anti-peeping pixel units 21A and shared pixel units 21B, and the anti-peeping pixel units 21A and shared pixel units 21B may be arranged alternately in the row direction and the column direction. Each anti-peeping pixel unit 21A includes a plurality of anti-peeping sub-pixels 21a, for example, including a red anti-peeping sub-pixel R, a green anti-peeping sub-pixel G, and a blue anti-peeping sub-pixel B. Each shared pixel unit 21B includes a plurality of shared sub-pixels 21b, for example, including a red shared sub-pixel R, a green shared sub-pixel G, and a blue shared sub-pixel B. In other embodiments, the arrangement of the anti-peeping pixel units and the shared pixel units may also be the same as Figure 4 The arrangements shown are different.

[0046] In one embodiment, Figure 1 and Figure 3 As shown, the display panel further includes an encapsulation layer 70 located on the side of the light emitting structure layer 20 away from the substrate 10. The encapsulation layer 70 may be a thin film encapsulation layer, which includes organic material layers and inorganic material layers arranged alternately, and the film layer with the largest distance from the substrate 10 is the inorganic material layer. In some embodiments, the encapsulation layer 70 includes two inorganic material layers and an organic material layer located between the two inorganic material layers.

[0047] In one embodiment, Figure 1 As shown, the pixel defining layer 60 is located between the driving circuit layer and the encapsulation layer 70, and is located on the side of the first electrode 211 away from the substrate 10. The pixel defining layer 60 defines the light-emitting area of ​​each sub-pixel 21 within a specific area by setting a pixel opening, thereby preventing light crosstalk between adjacent pixels and improving the clarity and resolution of the image. The bottom surface area of ​​the pixel opening is also the light-emitting area of ​​the sub-pixel located within the pixel opening.

[0048] In one embodiment, Figure 1 As shown, the display panel further includes at least one protruding structure 32 located on the side of the substrate 10 facing the light emitting structure layer 20, for example, an annular protrusion, that is, each of the protruding structures 32 surrounds the light emitting area of ​​one of the anti-peeping sub-pixels 21a, and the orthographic projection of the opening of the annular protruding structure 32 on the substrate 10 at least partially overlaps with the orthographic projection of the light emitting area of ​​the anti-peeping sub-pixel 21a on the substrate 10. The light blocking structure 31 is at least arranged on the inner side of the protruding structure 32, that is, arranged on the side of the protruding structure 32 facing the pixel opening corresponding to the light emitting area of ​​the anti-peeping sub-pixel 21a. By providing the protruding structure 32 and arranging the light blocking structure 31 on the side of the protruding structure 32, the formation of the light blocking structure 31 is facilitated; and the arrangement of the protruding structure 32 can increase the position height of the light blocking structure 31, so as to avoid the light blocking structure 31 being too low in height to block the light with a large emission angle emitted by the anti-peeping sub-pixel 21a.

[0049] In one embodiment, Figure 1 and Figure 2 As shown, the orthographic projection of the pixel defining layer 60 on the substrate 10 covers the orthographic projection of the protrusion structure 32 on the substrate 10, and the orthographic projection of the pixel defining layer 60 on the substrate 10 covers the orthographic projection of the light blocking structure 31 on the substrate 10. Such a configuration helps to improve the slope angle of the pixel opening 61 of the pixel defining layer 60, so that the slope angle of the pixel opening 61 of the pixel defining layer 60 is smaller than the slope angle of the protrusion structure 32, which helps to avoid the problem of the second electrode 213 being broken.

[0050] In one embodiment, Figure 2 As shown, when the light blocking structure 31 is a reflective material and the display panel includes a protruding structure 32, the pixel defining layer 60 covers the surface of the protruding structure 32 away from the substrate and completely covers the inner side of the light blocking structure 31. In other embodiments, the pixel defining layer 60 may not cover the light blocking structure 31, but only covers the surface of the protruding structure 32 away from the substrate; or, the pixel defining layer 60 may cover the surface of the protruding structure 32 away from the substrate and a portion of the inner side of the light blocking structure 31.

[0051] Furthermore, regardless of whether the pixel defining layer covers the side of the light blocking structure 31, the light emitting material layer 212 will not extend to the side of the light blocking structure 31. In one embodiment, the material of the light blocking structure 31 is a reflective material, and part of the light emitted by the light emitting material layer 212 of the anti-peep sub-pixel 21a is reflected after being incident on the inner side of the light blocking structure 31, and the reflected light can be emitted, thereby reducing the amount of light with a large emission angle while increasing the amount of light emitted from the display panel at a normal viewing angle. In some embodiments, the material of the light blocking structure 31 can be a metal material.

[0052] In one embodiment, Figure 1 and Figure 2 As shown, when the material of the light blocking structure 31 is a reflective material and the pixel defining layer 60 covers the side of the light blocking structure 31, the pixel defining layer 60 is a light-transmitting material; when the pixel defining layer 60 does not cover the side of the light blocking structure 31, the pixel defining layer 60 can be a light-transmitting material or a light-impermeable material.

[0053] In one embodiment, Figure 1As shown, in the direction from the substrate 10 to the light emitting structure layer 20, the cross-sectional area of ​​the cavity enclosed by the light blocking structure 31 gradually increases. In this way, the light emitted by the sub-pixel 21 is reflected when incident on the inner side of the light blocking structure 31, which can reduce the emission angle of the reflected light, help to further reduce the emission amount of the large viewing angle light of the display panel, and improve the front light emission rate of the display panel.

[0054] Figure 1 The light paths L2 to L6 of the light emitted from the reference line L1 and the anti-peeping sub-pixel 21a are shown. Taking the light path on the left side of the anti-peeping sub-pixel 21a as an example, the light blocking structure 31 located on the protruding structure 32 can block the light between the reference line L1 and the light path L2, preventing this part of the light from emitting from the area corresponding to the shared sub-pixel 21b, so that the driver or other people cannot observe the light and the displayed content of the display panel from the side of the display panel. By setting the height of the protruding structure 32, the angle range of the light that can be blocked by the light blocking structure 31 can be adjusted, and then the anti-peeping angle of the display panel can be specifically set according to application requirements.

[0055] In one embodiment, Figure 1 As shown, the protruding structure 32 is located above the second planarization layer 56. The protruding structure 32 can be formed in the same process step as the second planarization layer 56, that is, a planarization film layer with a larger thickness is formed first, and a portion of the planarization film layer with a larger distance from the substrate 10 is patterned to form the protruding structure, and the portion of the planarization film layer located on the side of the protruding structure facing the substrate 10 is the second planarization layer 56. Alternatively, the protruding structure 32 can be formed in different process steps from the second planarization layer 56, and the second planarization layer 56 is formed first, and then the protruding structure 32 is formed on the side of the second planarization layer 56 away from the substrate 10. The material of the protruding structure 32 can be the same as the material of the second planarization layer 56. In some embodiments, the material of the protruding structure 32 can be a material such as polystyrene or polyimide.

[0056] In one embodiment, Figure 1 As shown, the first electrode 211 and the light blocking structure 31 are arranged in the same layer. The two structures are arranged in the same layer, which means that the first electrode 211 and the light blocking structure 31 are located in the same layer and made of the same material, and can be formed simultaneously in one patterning process, that is, the first electrode 211 is extended to the inner side of the protruding structure 32. This can reduce the process steps and reduce the production cost. Figure 1 In the illustrated embodiment, the first electrode 211 is an anode and the material of the first electrode 211 is a metal material, that is, the light blocking structure 31 is a metal material. At this time, the light blocking structure 31 can block and reflect the light with a large output angle emitted by the anti-peeping sub-pixel 21a.

[0057] In one embodiment, Figure 1 As shown, the light blocking structure 31 and the first electrode 211 are an integrated structure, that is, the first electrode 211 is connected to the light blocking structure 31. In this way, when forming the pixel opening 61 of the pixel defining layer 60, even if the pixel opening 61 is offset, part of the above-mentioned integrated structure can be exposed, thereby reducing the requirements for process accuracy.

[0058] In one embodiment, Figure 1 As shown, the light blocking structure 31 is partially located on the surface of the protruding structure 32 away from the substrate 10. When forming the light blocking structure 31, only forming it on the side surface requires high process precision. The light blocking structure 31 is formed on the side surface and the top surface of the protruding structure 32 at the same time, which can ensure that the light blocking structure 31 covers the side surface of the protruding structure 32 while reducing the process precision requirement; and the light emitted by the anti-peeping sub-pixel 21a will also be reflected when it is incident on the side surface of the light blocking structure 31 located on the surface of the protruding structure 32 away from the substrate 10, which can reduce the emission amount of large-angle light.

[0059] In one embodiment, Figure 2 As shown, the orthographic projection of the pixel defining layer 60 on the substrate 10 covers the orthographic projection of the light blocking structure 31, the protruding structure 32 and part of the first electrode 211 on the substrate 10. The side of the pixel opening 61 is stepped, including a first sub-side surface 611, a first plane 612 and a second sub-side surface 613 connected in sequence. The first sub-side surface 611 is located on the side of the first plane 612 facing the substrate 10. The orthographic projection of the opening formed by the second sub-side surface 613 on the substrate 10 covers the orthographic projection of the opening formed by the first sub-side surface 611 on the substrate 20. The distance from the surface of the light blocking layer 30 away from the substrate 10 to the substrate 10 is greater than the distance from the first plane 612 to the substrate 10. The opening formed by the first sub-side surface 611 defines the light-emitting area of ​​the anti-peeping sub-pixel 21b. In this way, the amount of light emitted by the anti-peeping sub-pixel 21b at a large angle reflected by the light blocking structure 31 can be large, effectively reducing the amount of light emitted at a large viewing angle. In the process of preparing the pixel defining layer, two exposure and development processes may be performed, so that the side surface of the formed pixel opening 61 has the above-mentioned step shape.

[0060] In one embodiment, Figure 2As shown, the distance between the top surface 614 of the pixel defining layer 60 surrounding the pixel opening 61 of the shared sub-pixel 21b and the substrate 10 is equal to the distance between the first plane 612 and the substrate 10. If the distance from the surface of the light blocking layer 30 away from the substrate 10 to the substrate 10 is less than the distance from the first plane 612 to the substrate 10, the light blocking layer 30 cannot effectively block the large-angle light emitted by the anti-peeping sub-pixel 21a. At this time, the maximum angle range of the light finally emitted from the anti-peeping sub-pixel 21a and the shared sub-pixel 21b is basically the same, so that the anti-peeping effect of the display panel in the anti-peeping mode is poor. Setting the distance from the surface of the light blocking layer 30 away from the substrate 10 to the substrate 10 to be greater than the distance from the first plane 612 to the substrate 10 can effectively improve the anti-peeping effect of the display panel.

[0061] In one embodiment, Figure 2 As shown, the distance from the bottom surface of the pixel opening 61 to the substrate 10 is greater than or equal to the distance from the side of the light blocking structure 31 facing the substrate 10 to the substrate 10. The light blocking structure 31 is partially in contact with the surface of the second planarization layer 56 away from the substrate 10, and the distance from this part to the substrate 10 is also the distance from the side of the light blocking structure 31 facing the substrate 10 to the substrate 10. The light emitting material layer 212 is arranged in the pixel opening 61. Through the above arrangement, it can be ensured that the distance from the bottom surface of the light emitting material layer 212 to the substrate 10 is greater than the distance from the side of the light blocking structure 31 facing the substrate 10 to the substrate 10, thereby avoiding the problem of poor anti-peeping effect of the display panel caused by light being emitted from the bottom of the light blocking structure 31. Figure 2 In the illustrated embodiment, the distance between the bottom surface of the pixel opening 61 and the substrate 10 is equal to the distance between the side of the light blocking structure 31 facing the substrate 10 and the substrate 10 .

[0062] In one embodiment, the material of the light blocking structure 31 is a light absorbing material. In this way, the large-angle light emitted by the anti-peeping sub-pixel 21a is absorbed by the pixel defining layer 60, thereby improving the anti-peeping effect. In some embodiments, the light blocking structure 31 can be directly prepared on the surface of the second planar layer 56 away from the substrate 10.

[0063] exist Figure 3 In the embodiment shown, the pixel defining layer 60 covers the surface and side of the light blocking structure 31 away from the substrate 10. In other embodiments, the pixel defining layer 60 may completely cover the surface of the light blocking structure 31 away from the substrate 10 or only cover a portion of the surface of the light blocking structure 31 away from the substrate 10. Figure 3As shown, the light blocking structure 31 is a protruding structure that can absorb light, and the orthographic projection of the pixel defining layer 60 on the substrate 10 covers the orthographic projection of the protruding structure on the substrate 10. The angle between the side of the light blocking structure 31 and the upper surface of the second flat layer 56 is relatively large. After the pixel defining layer 60 is arranged above and on the side of the light blocking structure 31, the slope angle of the pixel defining layer 60 can be smaller than the slope angle of the light blocking structure 31, which can avoid the problem of the second electrode 213 being broken. In this embodiment, the material of the pixel defining layer 60 can be a light-transmitting material or a light-absorbing material.

[0064] In one embodiment, Figure 1 As shown, the display panel further includes a light shielding layer 80 located on the side of the light emitting structure layer 20 away from the substrate 10, each of the light shielding layers 80 is provided with a plurality of through holes 81, and the orthographic projection of each of the through holes 81 on the substrate 10 at least partially overlaps with the orthographic projection of the light emitting area of ​​one of the anti-peeping sub-pixels 21a on the substrate 10. Further, the orthographic projection of each of the through holes 81 on the substrate 10 covers the orthographic projection of the light emitting area of ​​one of the anti-peeping sub-pixels 21a on the substrate 10. The light blocking structure 31 can block part of the light emitted by the anti-peeping sub-pixel 21a toward the side of the display panel, but some light at a large angle is still emitted. By setting the light shielding layer 80, this part of the light can be absorbed, thereby further reducing the emission amount of the large-viewing-angle light of the display panel and improving the anti-peeping effect of the display panel.

[0065] exist Figure 1 In the illustrated embodiment, the light shielding layer 80 can shield the light between the light path L4 and the light path L5 to prevent this part of the light from being emitted from the inside of the display panel, thereby reducing the viewing angle range in which the light emitted by the display panel can be observed.

[0066] In one embodiment, Figure 1 As shown, at least one light shielding layer 80 is provided on the side of the light emitting structure layer 20 away from the substrate 10. In some embodiments, multiple light shielding layers may be included, and the multiple light shielding layers 80 are located at different heights, so that light within a larger angle range can be shielded, which is beneficial to further improve the anti-peeping effect of the display panel.

[0067] exist Figure 1 In the illustrated embodiment, when the display panel includes only one light-shielding layer 80, the light-shielding layer 80 can block the light within the angle range between the light path L4 and the light path L5'. When the display panel includes three light-shielding layers 80, the light-shielding layer 80 can block the light within a larger angle range between the light path L4 and the light path L5, which is more conducive to reducing the amount of light at a large output angle of the display panel.

[0068] In one embodiment, Figure 1As shown, the inner edge of the surface of the light blocking structure 31 away from the substrate 10 includes a first side and a second side opposite to each other. The area of ​​the first electrode 211 exposed by the corresponding pixel opening 61 toward the surface of the substrate 10 includes a third side located on the same side as the first side and a fourth side located on the same side as the second side. The straight line where point A of the first side and point C of the third side are located passes through the light shielding layer 80, and the straight line where point B of the first side and point D of the fourth side are located intersects with the light shielding layer 80.

[0069] Figure 1 In the embodiment shown, the straight line where point A of the first side and point C of the third side are located is the light path L2, and the straight line where point B of the first side and point D of the fourth side are located is the light path L3. The above arrangement can make the light emitted by the anti-peeping sub-pixel 21a with an angle outside the light path L2 and the light path L3 basically all be absorbed by the light shielding layer, and only the light with an angle between the light path L5 and the light path L6 is emitted. The above effect can be achieved by adjusting the height of the light blocking structure 31 and the minimum distance between the light blocking structure 31 and the light shielding layer 80.

[0070] Similarly, the straight line between point B of the second side and point D of the fourth side can pass through the shading layer 80, and the straight line between point C of the third side and point B of the second side can pass through the shading layer 80 to ensure the anti-peeping effect of the display panel.

[0071] In one embodiment, in the direction from the substrate to the light-emitting structure layer, the height of the light blocking layer ranges from 1μm to 4.5μm. The width of the sub-pixel ranges from 10μm to 30μm, and the length of the sub-pixel ranges from 10μm to 30μm; the thickness of the encapsulation layer 70 ranges from 5μm to 17μm, and the thickness of the light shielding layer 80 ranges from 0.5μm to 2μm. This arrangement can achieve a better anti-peeping effect for the display panel and reduce the emission of light at a large emission angle. The height of the light blocking structure 31 refers to the distance between the surface of the light blocking structure 31 facing the substrate and the surface away from the substrate.

[0072] In one embodiment, the display panel further includes a light shielding material layer and a filter layer located on the side of the light shielding layer 80 away from the substrate 10, the light shielding material layer is provided with a plurality of openings, and the filter layer includes a plurality of filter structures, each of which is located in an opening. The orthographic projections of each anti-peeping sub-pixel 21a and each shared sub-pixel 21b on the substrate 10 overlap with the orthographic projections of an opening of the light shielding material layer on the substrate 10. Furthermore, the orthographic projections of each anti-peeping sub-pixel 21a and each shared sub-pixel 21b on the substrate 10 fall within the orthographic projections of an opening of the light shielding material layer on the substrate 10. The color of each filter structure is the same as the luminous color of the corresponding sub-pixel.

[0073] The present application also provides a method for preparing a display panel, which is used to prepare the above display panel. Figure 1 The display panel shown in FIG. 1 is used as an example to introduce its preparation method. The preparation method includes:

[0074] Provide a substrate 10, and sequentially prepare a buffer layer 51 and a driving circuit layer on the substrate 10. Through this step, the following can be obtained: Figure 5 The structure shown.

[0075] Afterwards, a protruding structure 32 is prepared on the side of the driving circuit layer away from the substrate 10. Specifically, the protruding structure 32 is prepared above the second flat layer 56. The material of the protruding structure 32 is the same as that of the second flat layer 56. Through this step, the following can be obtained: Figure 6 The structure shown.

[0076] Afterwards, a first electrode 211 is prepared on the side of the driving circuit layer away from the substrate 10. The first electrode 211 of the anti-peep sub-pixel covers part of the surface of the second flat layer 56, the side surface of the protruding structure 32, and part of the top surface. The first electrode 211 and the light blocking structure 31 are an integral structure. Figure 7 The structure shown.

[0077] Afterwards, if Figure 8 As shown, a pixel defining layer 60 is formed on the side of the driving circuit layer away from the substrate 10. The pixel defining layer around the anti-peep sub-pixel covers the protruding structure 32 and the light blocking structure 31.

[0078] Afterwards, if Fig. 9 As shown, a light emitting material layer 212 , a second electrode 213 and an encapsulation layer 70 are sequentially prepared on a side of the driving circuit layer away from the substrate 10 .

[0079] Afterwards, if Fig.10 As shown, a light shielding layer 80 is prepared on a side of the encapsulation layer 70 away from the substrate 10 .

[0080] The embodiment of the method for preparing a display panel provided in the embodiment of the present application and the embodiment of the display panel belong to the same inventive concept, and the description of relevant details and beneficial effects can be referred to each other and will not be repeated here.

[0081] The present application also provides a display device, which includes the above-mentioned display panel.

[0082] In one embodiment, the display device further includes a driver and a power supply circuit, wherein the driver is used to provide a driving signal for driving the sub-pixel to emit light, and the power supply circuit is used to supply power to the display panel.

[0083] In one embodiment, the display device further includes a housing, and the display panel is disposed in the housing.

[0084] The present application does not impose any specific restrictions on the applicability of display devices, which can be any product or component with display function, such as televisions, laptops, tablet computers, wearable display devices, mobile phones, car displays, navigation, e-books, digital photo frames, advertising light boxes, etc.

[0085] It should be noted that the technical solutions or technical features described in the above embodiments can be combined or supplemented with each other without causing conflicts. The scope of protection of this application is not limited to the precise structures described in the above embodiments and shown in the drawings; all modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of this application should be included in the scope of protection of this application.

Claims

1. A display panel, characterized in that: include: substrate; A light-emitting structure layer is located on one side of the substrate; the light-emitting structure layer includes a plurality of anti-peeping sub-pixels; A light blocking layer is located on the same side of the substrate as the light emitting structure layer; the light blocking layer includes at least one light blocking structure, each of which surrounds a light emitting area of ​​the anti-peeping sub-pixel and is used to block part of the light emitted by the anti-peeping sub-pixel; The pixel defining layer is located on a side of the light blocking structure away from the substrate and covers the light blocking structure; the pixel defining layer is provided with a plurality of pixel openings, and each of the anti-peep sub-pixels is at least partially located in one of the pixel openings.

2. The display panel according to claim 1, characterized in that: The material of the light blocking structure is a reflective material.

3. The display panel according to claim 2, characterized in that: The display panel further comprises at least one protruding structure located on a side of the substrate facing the light emitting structure layer, each of the protruding structures surrounds a light emitting area of ​​the anti-peeping sub-pixel; the light blocking structure is at least arranged on the inner side of the protruding structure.

4. The display panel according to claim 3, characterized in that: The display panel further includes a planarization layer located between the substrate and the protruding structure, and the protruding structure is in contact with the planarization layer; the material of the protruding structure is the same as that of the planarization layer.

5. The display panel according to claim 3, characterized in that: The anti-peeping sub-pixel comprises a first electrode, a light-emitting material layer, and a second electrode; the light-emitting material layer is located on a side of the first electrode away from the substrate; the second electrode is located on a side of the light-emitting material layer away from the substrate; The first electrode is disposed in the same layer as the light blocking structure.

6. The display panel according to claim 5, characterized in that: The light blocking structure and the first electrode are an integrated structure.

7. The display panel according to claim 2, characterized in that: In the direction from the substrate to the light emitting structure layer, the cross-sectional area of ​​the cavity formed by the light blocking structure gradually increases.

8. The display panel according to claim 1, characterized in that: The side surface of the pixel opening includes a first sub-side surface, a first plane, and a second sub-side surface connected in sequence, the first sub-side surface is located on a side of the first plane facing the substrate, and an orthographic projection of the second sub-side surface on the substrate is located outside an orthographic projection of the first sub-side surface on the substrate; The distance from the surface of the light blocking layer away from the substrate to the substrate is greater than the distance from the first plane to the substrate.

9. The display panel according to claim 1, characterized in that: The distance between the bottom surface of the pixel opening and the substrate is greater than or equal to the distance between the side of the light blocking structure facing the substrate and the substrate.

10. The display panel according to claim 1, characterized in that: The material of the light blocking structure is a light absorbing material.

11. The display panel according to claim 1, characterized in that: The display panel also includes at least one light-shielding layer located on a side of the light-emitting structure layer away from the substrate, each of the light-shielding layers is provided with a plurality of through holes, and an orthographic projection of each of the through holes on the substrate at least partially overlaps with an orthographic projection of a light-emitting area of ​​one of the anti-peep sub-pixels on the substrate.

12. The display panel according to claim 1, characterized in that: In the direction from the substrate to the light emitting structure layer, the height of the light blocking layer ranges from 1 μm to 4.5 μm.

13. The display panel according to claim 1, characterized in that: The display panel also includes a plurality of shared sub-pixels.

14. A display device, characterized in that: The display device comprises the display panel according to any one of claims 1 to 13.

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