Display panel and display device

Abstract

Embodiments of the present application relate to the technical field of display, and provide a display panel and a display device, for use in improving the wide-angle anti-peeping effect of the display panel. The display panel comprises: a substrate; a plurality of light-emitting elements located on one side of the substrate, wherein each of the light-emitting elements comprises a first light-emitting unit and a second light-emitting unit; a first light blocking layer located on the side of the first light-emitting unit distant from the substrate, wherein the first light blocking layer comprises a first opening; and a second light blocking layer located on the side of the first light blocking layer distant from the substrate, wherein the second light blocking layer comprises a second opening. In a direction perpendicular to the plane where the substrate is located, both the first opening and the second opening at least partially overlap the first light-emitting unit; and the area of the first opening is greater than that of the second opening, and the orthographic projection of the second light blocking layer on the plane where the substrate is located at least partially covers the edge of the first opening.

Description

Display panel and display device

[0001] The present application claims priority to the Chinese patent application No. 202411369865.5, filed on September 27, 2024, and entitled "Display panel and display device", the content of which is incorporated herein by reference in its entirety. TECHNICAL FIELD

[0002] The present application relates to the technical field of display, in particular to a display panel and a display device. BACKGROUND

[0003] With the continuous development of display technology, consumers' requirements for display screens are constantly improving. At present, various types of displays including liquid crystal display screens and organic light emitting display screens are emerging in an endless stream and developing rapidly. On this basis, 3D display, touch display technology, curved display, ultra-high resolution display, and privacy display and other display technologies are constantly emerging.

[0004] At present, the improvement of the privacy performance of active light-emitting display screens including organic light emitting elements (Organic Light Emitting Diode, collectively referred to as OLED) has attracted great attention from researchers. SUMMARY

[0005] Therefore, the present application provides a display panel and a display device to improve the large viewing angle privacy effect of the display panel.

[0006] In a first aspect, the embodiments of the present application provide a display panel, comprising:

[0007] a substrate;

[0008] a plurality of light emitting elements located on one side of the substrate, the light emitting elements comprising first light emitting units and second light emitting units;

[0009] a first light blocking layer located on a side of the first light emitting units away from the substrate, the first light blocking layer comprising a first opening;

[0010] a second light blocking layer located on a side of the first light blocking layer away from the substrate, the second light blocking layer comprising a second opening;

[0011] In a direction perpendicular to the plane in which the substrate is located, the first opening and the second opening at least partially overlap the first light emitting units; and

[0012] The area of the first opening is greater than the area of the second opening, and the orthographic projection of the second light blocking layer on the plane in which the substrate is located at least partially covers the edge of the first opening.

[0013] In a second aspect, the embodiments of the present application provide a display device comprising the display panel described above.

[0014] By adopting the scheme provided in the embodiments of the present application, by setting the first light-emitting unit and the second light-emitting unit and allowing them to be lit at different times, in cooperation with the setting of the first light-blocking layer and the second light-blocking layer, when the first light-emitting unit is lit, the viewer at a large viewing angle cannot see the display picture, that is, the display panel has a large viewing angle privacy protection effect, and when the second light-emitting unit is lit, the viewers at different viewing angles can all see the display picture, that is, the display panel has a sharing effect. Based on this setting mode, while the display panel has the large viewing angle privacy protection effect, there is no need to set a privacy protection film on the light-emitting side of the display panel, and the structure of the display panel can be simplified. Moreover, the embodiments of the present application can realize convenient switching of the display panel between the privacy protection mode and the sharing mode by controlling the first light-emitting unit and the second light-emitting unit to be lit at different times.

[0015] Moreover, by setting the first light-blocking layer and the second light-blocking layer, allowing the area of the first opening to be larger than the area of the second opening, and allowing the second light-blocking layer to at least partially cover the edge of the first opening in the orthographic projection of the substrate plane, the first light-blocking layer and the second light-blocking layer can jointly limit the viewing angle of the display panel. Compared with the mode of setting only one light-blocking layer, while realizing the large viewing angle privacy protection effect of the display panel, the width of the first light-blocking layer and the second light-blocking layer required for privacy protection can be reduced, and the privacy protection viewing angle range can be increased. Moreover, the viewing angle range in the sharing mode can also be improved, and the first light-emitting unit and the second light-emitting unit can have a larger light-emitting area. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed in the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor.

[0017] FIG. 1 is a top view of a display panel according to an embodiment of the present application;

[0018] FIG. 2 is an enlarged view of region A1 in FIG. 1;

[0019] FIG. 3 is a sectional view of FIG. 2 along BB';

[0020] FIG. 4 is a sectional view of a display panel in the related art;

[0021] FIG. 5 is a sectional view of another display panel in the related art;

[0022] FIG. 6 is a circuit schematic of a pixel driving circuit according to an embodiment of the present application; and

[0023] FIG. 7 is a timing diagram of the operation of a pixel driving circuit in a privacy mode according to an embodiment of the present application;

[0024] FIG. 8 is a timing diagram of the operation of a pixel driving circuit in a sharing mode according to an embodiment of the present application;

[0025] FIG. 9 is a schematic diagram of the light path of the light emitted by a first light emitting unit according to an embodiment of the present application;

[0026] FIG. 10 is a schematic diagram of a light emitting element according to an embodiment of the present application;

[0027] FIG. 11 is a schematic diagram of a cross-section of FIG. 10 along CC’;

[0028] FIG. 12 is a schematic diagram of another light emitting element according to an embodiment of the present application;

[0029] FIG. 13 is a schematic diagram of a light emitting element group according to an embodiment of the present application;

[0030] FIG. 14 is a schematic diagram of another light emitting element group according to an embodiment of the present application;

[0031] FIG. 15 is a schematic diagram of yet another light emitting element group according to an embodiment of the present application;

[0032] FIG. 16 is a schematic diagram of yet another display panel according to an embodiment of the present application;

[0033] FIG. 17 is a schematic diagram of a cross-section of FIG. 15 along DD’;

[0034] FIG. 18 is a schematic diagram of yet another light emitting element group according to an embodiment of the present application;

[0035] FIG. 19 is a schematic diagram of yet another light emitting element group according to an embodiment of the present application;

[0036] FIG. 20 is a schematic diagram of yet another light emitting element according to an embodiment of the present application;

[0037] FIG. 21 is a schematic diagram of a cross-section of FIG. 20 along EE’;

[0038] FIG. 22 is a schematic diagram of yet another light emitting element according to an embodiment of the present application;

[0039] FIG. 23 is a schematic diagram of a cross-section of FIG. 22 along FF’;

[0040] FIG. 24 is a schematic diagram of yet another display panel according to an embodiment of the present application;

[0041] FIG. 25 is a schematic diagram of yet another light emitting element according to an embodiment of the present application;

[0042] FIG. 26 is a sectional view of FIG. 25 along GG';

[0043] FIG. 27 is another sectional view of FIG. 25 along GG';

[0044] FIG. 28 is still another sectional view of FIG. 25 along GG';

[0045] FIG. 29 is still another sectional view of FIG. 25 along GG';

[0046] FIG. 30 is a schematic view of a display device provided by an embodiment of the present application. DETAILED DESCRIPTION

[0047] For better understanding of the technical solutions of the present application, the embodiments of the present application are described in detail below with reference to the drawings.

[0048] It should be noted that the described embodiments are only some of the embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0049] The terms used in the embodiments of the present application are only for the purpose of describing the specific embodiments, and are not intended to limit the present application. The singular forms "a", "an" and "the" used in the embodiments of the present application and the appended claims are also intended to include the plural forms, unless the context clearly indicates otherwise.

[0050] It should be understood that the term "and / or" used herein only describes the association relationship of the associated objects, which means that there can be three relationships, for example, A and / or B, which can represent the three cases of A alone, A and B together, and B alone. In addition, the character " / " in this paper generally represents that the front and rear associated objects are a "or" relationship.

[0051] An embodiment of the present application provides a display panel, as shown in FIG. 1, which is a top view of a display panel provided by an embodiment of the present application, and FIG. 2 is an enlarged view of region A1 in FIG. 1, and FIG. 3 is a sectional view of FIG. 2 along BB'. The display panel 100 comprises a substrate 1 and a light emitting element 2. The light emitting element 2 is located on one side of the substrate 1, and the light emitting element 2 comprises a first light emitting unit 21 and a second light emitting unit 22. Exemplarily, the light emitting colors of the first light emitting unit 21 and the second light emitting unit 22 can be the same. The first light emitting unit 21 and the second light emitting unit 22 can emit light respectively in different working modes of the display panel.

[0052] As shown in FIG. 2 and FIG. 3, the display panel 100 further comprises a first light-blocking layer 31 and a second light-blocking layer 32, the first light-blocking layer 31 is located on a side of the first light-emitting unit 21 away from the substrate 1, and the first light-blocking layer 31 comprises a first opening 41; the second light-blocking layer 32 is located on a side of the first light-blocking layer 31 away from the substrate 1, and the second light-blocking layer 32 comprises a second opening 42. In a direction perpendicular to the plane in which the substrate 1 is located, the first opening 41 and the second opening 42 at least partially overlap the first light-emitting unit 21.

[0053] For example, as shown in FIG. 2 and FIG. 3, the first light-blocking layer 31 comprises a first sub-light-blocking part 311, and the second light-blocking layer 32 comprises a second sub-light-blocking part 321; in a first preset direction X11 parallel to the plane in which the substrate 1 is located, the first sub-light-blocking part 311 is located on a side of the first opening 41 away from the first light-emitting unit 21, and the second sub-light-blocking part 321 is located on a side of the second opening 42 away from the first light-emitting unit 21; in a direction perpendicular to the plane in which the substrate 1 is located, the first sub-light-blocking part 311 does not overlap the first light-emitting unit 21, the first sub-light-blocking part 311 does not overlap the second light-emitting unit 22, the second sub-light-blocking part 321 does not overlap the first light-emitting unit 21, and the second sub-light-blocking part 321 does not overlap the second light-emitting unit 22.

[0054] The display panel provided by the embodiment of the present application can have a large-viewing-angle privacy function. The first preset direction X11 is a direction with a privacy requirement, for example, the first preset direction X11 can be a left or right direction of the display panel, or the first preset direction X11 can also be an upper or lower direction of the display panel. FIG. 1 takes the right direction of the display panel as the first preset direction X11 as an example. When the display panel is located on the left side of the viewer and the viewer watches the display image to the left, it can be understood that the viewer is in the right direction of the display panel. When the display panel is located on the right side of the viewer and the viewer watches the display image to the right, it can be understood that the viewer is in the left direction of the display panel. When the display panel is located on the lower side of the viewer and the viewer watches the display image by lowering the head, it can be understood that the viewer is in the upper direction of the display panel. When the display panel is located on the upper side of the viewer and the viewer watches the display image by raising the head, it can be understood that the viewer is in the lower direction of the display panel.

[0055] Exemplarily, the working modes of the display panel provided by the embodiments of the present application include a sharing mode and a privacy mode. The visual angle of the display panel in the sharing mode is larger than that in the privacy mode. For example, the maximum visual angle of the display panel in the privacy mode is 45° (the visual angle range is 0-45°), that is, a viewer viewing the display panel at an angle greater than 45° cannot clearly see or view the display picture. The maximum visual angle of the display panel in the sharing mode is at least 60° (the corresponding visual angle range is 0-60°), and some display panels require that the maximum visual angle in the sharing mode be 65° (the visual angle range is 0-65°). Of course, the maximum visual angle in the sharing mode can be adjusted according to user requirements.

[0056] In the embodiments of the present application, the first light emitting unit 21 can serve as a privacy pixel that is lit in the privacy mode; and the second light emitting unit 22 can serve as a sharing pixel that is lit in the sharing mode. Of course, the first light emitting unit 21 and the second light emitting unit 22 can also be lit in the sharing mode, so as to increase the brightness of the display panel. For the convenience of description, the present application is only explained by taking the example that only the second light emitting unit 22 is lit in the sharing mode.

[0057] In the privacy mode, the first light emitting unit 21 is lit. As shown in FIG. 3, the small-angle light emitted by the first light emitting unit 21, such as the first light L11 shown in FIG. 3, can avoid the first sub-light blocking part 311 and the second sub-light blocking part 321, and sequentially pass through the first opening 41 and the second opening 42 to be emitted out of the display panel 100, so that a viewer at a small viewing angle, such as a viewer at a normal viewing angle, can view the display picture. The small-angle light refers to light whose emission angle is less than or equal to a first preset angle. The first preset angle can be set according to the requirement of the privacy viewing angle of different observation sides of the display panel. The emission angle of the light is the included angle between the propagation direction and the normal line of the substrate 1.

[0058] In the embodiments of the present application, as shown in FIGS. 2 and 3, the area of the first opening 41 is larger than that of the second opening 42, and the normal projection of the second light blocking layer 32 on the plane of the substrate 1 at least partially covers the edge of the first opening 41.

[0059] In the privacy mode, the large-angle light emitted by the first light emitting unit 21 can be blocked by the first sub-light blocking part 311 or the second sub-light blocking part 321 and cannot be emitted out of the display panel, thereby realizing the large-viewing-angle privacy effect of the display panel 100. The large-angle light refers to the light emitted by the first light emitting unit 21 and having an emission angle greater than a first preset angle. Specifically, as shown in FIG. 3, the second light L12 emitted by the first light emitting unit 21 can be blocked by the first sub-light blocking part 311 and cannot be emitted out of the display panel, and the third light L13 can be blocked by the second sub-light blocking part 321 and cannot be emitted out of the display panel. The emission angle of the third light L13 is smaller than that of the second light L12.

[0060] In the embodiment of the present application, the second light emitting unit 22 can serve as a sharing pixel that is lit in the sharing mode.

[0061] In the privacy mode, the second light emitting unit 22 is turned off.

[0062] In the sharing mode, the second light emitting unit 22 is lit, and the small-angle light emitted by the second light emitting unit 22, such as the fourth light L21 shown in FIG. 3, can be emitted out of the display panel. In addition, the large-angle light emitted by the second light emitting unit 22, such as the fifth light L22 shown in FIG. 3, can avoid the first light blocking layer 31 and the second light blocking layer 32 and be emitted out of the display panel, so that the viewers in the normal viewing angle and the large viewing angle can both watch the display screen, thereby realizing the sharing effect of multiple viewers watching the screen at the same time.

[0063] The display panel provided by the embodiment of the present application can realize the large-viewing-angle privacy effect of the display panel by setting the first light emitting unit 21 and the second light emitting unit 22 to be lit at different times and cooperating with the setting of the first light blocking layer 31 and the second light blocking layer 32. When the first light emitting unit 21 is lit, the viewers in the large viewing angle cannot clearly see the display screen, that is, the display panel has the large-viewing-angle privacy effect. When the second light emitting unit 22 is lit, the viewers in different viewing angles can all see the display screen, that is, the display panel has the sharing effect. Based on the setting mode, the display panel has the large-viewing-angle privacy effect, and does not need to be provided with a privacy film on the light-emitting side, so that the thickness of the display panel can be reduced, thereby realizing the thin design of the display panel. In addition, the first light emitting unit 21 and the second light emitting unit 22 can be controlled to be lit at different times, thereby realizing the convenient switching of the display panel between the privacy mode and the sharing mode.

[0064] Further, by setting the first light-blocking layer 31 and the second light-blocking layer 32, and making the area of the first opening 41 greater than the area of the second opening 42, and making the orthogonal projection of the second light-blocking layer 32 on the plane where the substrate 1 is located at least partially cover the edge of the first opening 41, the first light-blocking layer 31 and the second light-blocking layer 32 can jointly limit the viewing angle of the display panel. Compared with the way of setting only one light-blocking layer, the width of the first light-blocking layer 31 and the second light-blocking layer 32 required for privacy can be reduced, the privacy viewing angle range can be increased, and the viewing angle range in the sharing mode can also be improved.

[0065] As shown in FIG. 3 and FIG. 4, FIG. 4 is a cross-sectional view of a display panel in the related art. Compared with FIG. 3, FIG. 4 removes the second light-blocking layer and only includes the first light-blocking layer 31. In FIG. 4, in order to block the third light L13 shown in FIG. 3, at least the edge E11' of the first sub-light-blocking part 311 close to the first light-emitting unit 21 needs to be moved to the position shown by the dashed line in FIG. 4. It can be seen that this will cause the distance between the edge E11' of the first sub-light-blocking part 311 and the first light-emitting unit 21 in the first preset direction X11 to be reduced, and even the first sub-light-blocking part 311 and the first light-emitting unit 21 may overlap in the direction perpendicular to the plane where the substrate 1 is located, which will affect the brightness of the normal viewing angle light emitted by the first light-emitting unit 21.

[0066] In the embodiment of the present application, as shown in FIG. 3, the second sub-light-blocking part 321 is provided, which can block part of the large-angle light emitted by the first light-emitting unit 21, such as the third light L13 in FIG. 3. While avoiding the third light L13 from exiting the display panel 100, the distance d1 between the first edge E11 of the first sub-light-blocking part 311 close to the first light-emitting unit 21 and the first light-emitting unit 21 can be increased, which avoids the first sub-light-blocking part 311 from blocking the small-angle light emitted by the first light-emitting unit 21, and is conducive to improving the brightness of the normal viewing angle in the privacy mode of the display panel.

[0067] In addition, in the case of not setting the second light-blocking layer and only setting the first light-blocking layer 31, if the distance between the first edge E11 of the first sub-light-blocking part 311 and the first light-emitting unit 21 is set as d1 as shown in FIG. 3, the third light L13 will leak out of the display panel 100 through the first opening 41 as shown in FIG. 4, which will cause the viewer in the large viewing angle of the display panel in the first preset direction X11 to still be able to see the display screen, that is, the privacy viewing angle range of the display panel in the first preset direction X11 will be reduced, and the privacy effect cannot be well achieved.

[0068] In combination with FIG. 3 and FIG. 5, FIG. 5 is a schematic cross-sectional view of another display panel in the related art, compared with FIG. 3, FIG. 5 removes the first light-blocking layer and only includes the second light-blocking layer 32. In FIG. 5, to block the second light L12 with a large exit angle emitted by the first light-emitting unit 21, at least the second sub-light-blocking part 321 needs to be moved away from the edge E22' of the first light-emitting unit 21 to a position shown by a dashed line in FIG. 5 away from the first light-emitting unit 21. In the case where the first light-emitting unit 21 and the second light-emitting unit 22 are arranged along the first preset direction X11 and the distance P between the two is constant, as shown in FIG. 5, removing the first light-blocking layer will cause the distance between the edge E22' of the second sub-light-blocking part 321 and the second light-emitting unit 22 in the first preset direction X11 to decrease, and the fifth light L22 emitted by the second light-emitting unit 22 that can originally avoid the second sub-light-blocking part 321 will be blocked by the second sub-light-blocking part 321 and cannot be emitted out of the display panel.

[0069] Based on the arrangement shown in FIG. 5, to enable the fifth light L22 emitted by the second light-emitting unit 22 to avoid the second sub-light-blocking part 321, the distance P between the first light-emitting unit 21 and the second light-emitting unit 22 needs to be increased or the area of the second light-emitting unit 22 needs to be reduced, which will cause the resolution of the display panel to decrease or affect the aperture ratio of the second light-emitting unit 22.

[0070] However, in the embodiment of the present application, as shown in FIG. 3, the first sub-light-blocking part 311 can block part of the large-angle light emitted by the first light-emitting unit 21, such as the second light L12 in FIG. 3. In the case where the first light-emitting unit 21 and the second light-emitting unit 22 are arranged along the first preset direction X11, based on the arrangement of the first sub-light-blocking part 311, the distance between the third edge E22 of the second sub-light-blocking part 321 and the second light-emitting unit 22 can be increased, and the second sub-light-blocking part 321 is prevented from blocking the light emitted by the second light-emitting unit 22, which is conducive to improving the display effect of the display panel in the sharing mode.

[0071] In addition, if the distance between the third edge E22 of the second sub-light-blocking part 321 and the second light-emitting unit 22 is set as d2 as shown in FIG. 3, in the case where the first light-blocking layer is not arranged and only the second light-blocking layer 32 is arranged, as shown in FIG. 5, the second light L12 will leak out of the display panel 100, avoiding the second sub-light-blocking part 321, which will cause the viewer in a large viewing angle of the display panel to still be able to see the display image, that is, the anti-peep viewing angle range of the display panel will be reduced and the anti-peep effect cannot be well achieved.

[0072] In conclusion, the embodiment of the present application can make the first light-blocking layer 31 and the second light-blocking layer 32 jointly limit the visual angle of the display panel, compared with the way of setting only one light-blocking layer, while realizing the large visual angle privacy effect of the display panel 100, the width of the first light-blocking layer 31 and the second light-blocking layer 32 required for privacy can be reduced, and the privacy visual angle range can be increased. Moreover, the visual angle range in the sharing mode can also be improved, and the first light-emitting unit 21 and the second light-emitting unit 22 have a larger surface light-emitting area.

[0073] For example, the embodiment of the present application can drive the first light-emitting unit 21 and the second light-emitting unit 22 respectively.

[0074] In an optional embodiment, in combination with FIG. 6, FIG. 7 and FIG. 8, FIG. 6 is a circuit schematic diagram of a pixel driving circuit provided by the embodiment of the present application, FIG. 7 is a working timing diagram of a pixel driving circuit in a privacy mode provided by the embodiment of the present application, and FIG. 8 is a working timing diagram of a pixel driving circuit in a sharing mode provided by the embodiment of the present application. The display panel further includes a pixel driving circuit 60, and the pixel driving circuit 60 includes a first light-emitting control module 611, a second light-emitting control module 621, a third light-emitting control module 622, a gate reset module 63, a first anode reset module 641, a second anode reset module 642, a data writing module 65, a threshold compensation module 66 and a storage capacitor Cst. Wherein,

[0075] The gate reset module 63 includes a gate reset transistor M1, which is electrically connected between the first reset signal line Ref1 and the gate of the driving transistor M0, and is used for resetting the gate of the driving transistor M0 in response to the active level provided by the first scan signal line S1.

[0076] The first anode reset module 641 includes a first anode reset transistor M21, which is electrically connected between the second reset signal line Ref2 and the first light-emitting unit 21, and is used for resetting the anode voltage of the first light-emitting unit 21 in response to the active level provided by the second scan signal line S2.

[0077] The second anode reset module 642 includes a second anode reset transistor M22, which is electrically connected between the second reset signal line Ref2 and the second light-emitting unit 22, and is used for resetting the anode voltage of the second light-emitting unit 22 in response to the active level provided by the second scan signal line S2.

[0078] The data writing module 65 comprises a data writing transistor M3 electrically connected between the data line Data and the first electrode of the driving transistor M0, and the threshold compensation module 66 comprises a threshold compensation transistor M4 electrically connected between the second electrode of the driving transistor M0 and the gate electrode of the driving transistor M0. The data writing transistor M3 and the threshold compensation transistor M4 are configured to write the data voltage to the gate electrode of the driving transistor M0 and perform threshold compensation on the driving transistor M0 in response to the active level provided by the second scan signal line S2.

[0079] The first light emitting control module 611 comprises a first light emitting control transistor M5 electrically connected between the power supply signal line PVDD and the first electrode of the driving transistor M0.

[0080] The second light emitting control module 621 comprises a second light emitting control transistor M61 electrically connected between the second electrode of the driving transistor M0 and the first light emitting unit 21.

[0081] The third light emitting control module 622 comprises a third light emitting control transistor M62 electrically connected between the second electrode of the driving transistor M0 and the second light emitting unit 22.

[0082] For example, in the privacy mode, as shown in FIGS. 6 and 7, the pixel driving circuit 60 transmits the driving current converted by the driving transistor M0 to the first light emitting unit 21 to drive the first light emitting unit 21 to emit light in response to the enable level provided by the first light emitting control signal line E1 and the second light emitting control signal line E2. In addition, the second light emitting unit 22 is disabled from emitting light in response to the disable level provided by the third light emitting control signal line E3.

[0083] In the sharing mode, as shown in FIGS. 6 and 8, the pixel driving circuit 60 transmits the driving current converted by the driving transistor M0 to the second light emitting unit 22 to drive the second light emitting unit 22 to emit light in response to the enable level provided by the first light emitting control signal line E1 and the third light emitting control signal line E3. In addition, the transmission path between the pixel driving circuit 60 and the first light emitting unit 21 is turned off to disable the first light emitting unit 21 from emitting light in response to the disable level provided by the second light emitting control signal line E2.

[0084] Based on the above structure, the first light emitting unit 21 and the second light emitting unit 22 can share the driving current provided by the same pixel driving circuit 60 to emit light, which simplifies the circuit design of the display panel 100 and the occupied space of the pixel driving circuit 60 in the display panel 100, and is conducive to improving the pixel density.

[0085] It can be understood that, with reference to FIG. 6, in order to increase the brightness of the display panel in the sharing mode, the first light emitting unit 21 and the second light emitting unit 22 can also be driven to emit light in the sharing mode, at which time the first light emitting control signal line E1, the second light emitting control signal line E2 and the third light emitting control signal line E3 all need to provide an enable level in the light emitting stage.

[0086] It can be understood that, in FIG. 6, the first light emitting unit 21 and the second light emitting unit 22 share one pixel driving circuit 60 as an example for illustration, and in actual design, the first light emitting unit 21 and the second light emitting unit 22 can also be driven by different pixel driving circuits, which will not be described herein again.

[0087] For example, as shown in FIG. 2 and FIG. 3, along the first preset direction X11, the first sub-light blocking part 311 includes the first edge E11 close to the first light emitting unit 21, and the second sub-light blocking part 321 includes the second edge E21 close to the first light emitting unit 21.

[0088] As shown in FIG. 3, the display panel further includes a pixel definition layer 5, the pixel definition layer 5 includes a third opening 43 and a fourth opening 44, at least part of the first light emitting unit 21 is located in the third opening 43, and at least part of the second light emitting unit 22 is located in the fourth opening 44.

[0089] As shown in FIG. 2 and FIG. 3, along the first preset direction X11, the shortest distance between the first edge E11 and the third opening 43 is d1, the shortest distance between the second edge E21 and the third opening 43 is d3, and along the direction perpendicular to the plane where the substrate 1 is located, the shortest distance between the surface of the second sub-light blocking part 321 away from the substrate 1 and the surface of the first light emitting unit 21 away from the substrate 1 is h1. Wherein, the first light emitting unit 21 can include a first electrode, a light emitting layer and a second electrode which are arranged in a stack. The surface of the first light emitting unit 21 away from the substrate 1 can be the surface of the light emitting layer in the first light emitting unit 21 away from the substrate 1. As shown in FIG. 2 and FIG. 3, along the first preset direction X11, the length of the third opening 43 is a1.

[0090] In the embodiment of the present application, d3+a1≤tan(arcsin(n2×sinθ / n1))×h1, wherein θ is the maximum visible angle in the privacy mode, for example, θ can be 28°, 30° or 45° for display panels with different privacy requirements. n1 is the panel refractive index, and n2 is the air refractive index; wherein the panel refractive index can be understood as the equivalent refractive index of the plurality of film layers in the display panel located on the side of the first light emitting unit 21 close to the light exit side of the display panel. Based on this setting mode, (d3+a1) / h1≤tan(arcsin(n2×sinθ / n1)) can be achieved. As shown in FIG. 9, which is a schematic diagram of the light path of the emitted light of a first light emitting unit according to an embodiment of the present application, tanφ=(d3+a1) / h1≤tan(arcsin(n2×sinθ / n1)), that is, φ≤arcsin(n2×sinθ / n1) is achieved, wherein φ is the maximum value of the exit angle of the light emitted by the first light emitting unit 21 and exiting through the second opening 42, that is, the maximum value of the exit angle of the light emitted by the first light emitting unit 21 and exiting through the second opening 42 is less than or equal to θ, so that the light emitted by the first light emitting unit 21 and having an exit angle greater than θ is directed to the second sub-light blocking part 321 or the first sub-light blocking part 311 to be blocked by the second sub-light blocking part 321 or the first sub-light blocking part 311, thereby meeting the privacy viewing angle requirement of the display panel in the left-right direction.

[0091] Optionally, n1 can be 1.42, n2 can be 1, and θ can be 45°, in which case, d3+a1≤tan30°×h1 can be calculated. Based on this setting mode, the exit angle of the light emitted by the first light emitting unit 21 and exiting through the second opening 42 can be less than or equal to 45°.

[0092] It should be noted that d3 can be positive or negative, and in the case of d3 being negative, it indicates that the orthographic projection of the second edge E21 on the plane of the substrate 1 is located within the third opening 43.

[0093] Optionally, the embodiment of the present application can make d3≥0. For example, the embodiment of the present application can make d3=0, that is, the orthographic projection of the second edge E21 on the plane of the substrate 1 coincides with the edge of the first light emitting unit 21.

[0094] As shown in FIGS. 2 and 3, along the first preset direction X11, the second light-blocking sub-region 321 includes a third edge E22 away from the first light-emitting unit 21, and the shortest distance between the first edge E11 and the third edge E22 is d13. As shown in FIG. 3, along the first preset direction X11, the third opening 43 includes a first opening edge EK1 away from the second light-blocking sub-region 321, and the maximum included angle between the line connecting the first opening edge EK1 and the third edge E22 and the normal line of the substrate 1 is a1.

[0095] As shown in FIG. 3, along the direction perpendicular to the plane where the substrate 1 is located, the shortest distance between the surface of the substrate 1 away from the first light-blocking sub-region 311 and the surface of the substrate 1 away from the second light-blocking sub-region 321 is h12. In the embodiment of the present application, d13≥h12xtana1. Based on this arrangement, the first light-blocking sub-region 311 and the second light-blocking sub-region 321 can absorb more large-angle light emitted by the first light-emitting unit 21, so as to ensure that the large-angle light emitted by the first light-emitting unit 21 cannot be emitted from between the first light-blocking sub-region 311 and the second light-blocking sub-region 321, and the privacy effect of the display panel in the first preset direction X11 can be improved.

[0096] Optionally, as shown in FIGS. 1, 2 and 3, the first light-emitting unit 21 and the second light-emitting unit 22 can be arranged along the first preset direction X11 as described above. As shown in FIGS. 2 and 3, along the first preset direction X11 parallel to the plane where the substrate 1 is located, the first light-blocking sub-region 311 is located on the side of the first opening 41 close to the second light-emitting unit 22.

[0097] As shown in FIGS. 2 and 3, along the first preset direction X11, the minimum distance between the third edge E22 of the second light-blocking sub-region 321 and the second light-emitting unit 22 is d2, and the shortest distance between the first light-blocking sub-region 311 and the fourth opening 44 is d4. As shown in FIG. 3, along the direction perpendicular to the plane where the substrate 1 is located, the shortest distance between the surface of the substrate 1 away from the second light-blocking sub-region 321 and the surface of the substrate 1 away from the first light-emitting unit 21 is h1, and the shortest distance between the surface of the substrate 1 away from the first light-blocking sub-region 311 and the surface of the substrate 1 away from the second light-emitting unit 22 is h2. The second light-emitting unit 22 can include a first electrode, a light-emitting layer and a second electrode arranged in layers. The surface of the substrate 1 away from the second light-emitting unit 22 can be the surface of the light-emitting layer in the second light-emitting unit 22 away from the substrate 1. Wherein, d4≥d2xh2 / h1. Based on this arrangement, d4 / h2≥d2 / h1 can be achieved, so that the large-angle light emitted by the second light-emitting unit 22 and directed to the third edge E22 can successfully avoid the first light-blocking sub-region 311, which is conducive to meeting the brightness requirement of the shared viewing angle of the display panel in the first preset direction X11.

[0098] As shown in FIG. 2 and FIG. 3, the shortest distance between the second light emitting unit 22 and the surface of the substrate 1 and the surface of the first sub-light blocking part 311 away from the surface of the substrate 1 is h2. The second light emitting unit 22 can include a first electrode, a light emitting layer and a second electrode which are stacked. The surface of the second light emitting unit 22 away from the surface of the substrate 1 can be the surface of the light emitting layer in the second light emitting unit 22 away from the surface of the substrate 1. In the embodiment of the present application, a2+d2≥tan(arcsin(n2×sinβ / n1))×h1. Wherein, β is the maximum visual angle in the sharing mode, n1 is the panel refractive index, and n2 is the air refractive index. The panel refractive index can be understood as the equivalent refractive index of the plurality of film layers in the display panel on the side of the second light emitting unit 22 close to the light emitting side of the display panel. Based on this arrangement, the emission angle of the light emitted by the second light emitting unit 22 towards the first preset direction X11 and avoiding the light emitted by the second sub-light blocking part 321 is greater than or equal to β, that is, the light emitted by the second light emitting unit 22 towards the first preset direction X11 and having an emission angle greater than β can successfully avoid the second sub-light blocking part 321, which is beneficial to meet the sharing visual angle requirement of the display panel in the first preset direction X11. Moreover, by using this arrangement, it is not necessary to increase the distance between the first light emitting unit 21 and the second light emitting unit 22, nor is it necessary to reduce the area of the first light emitting unit 21 or the second light emitting unit 22, which is beneficial to ensure that the first light emitting unit 21 and the second light emitting unit 22 have a larger light emitting area.

[0099] Optionally, n1 can be 1.42, n2 can be 1, and β can be 90°, in which case, calculation can obtain: d2+a2≥tan45°×h1=h1.

[0100] For example, as shown in FIG. 10 and FIG. 11, FIG. 10 is an enlarged schematic view of a light emitting element provided by an embodiment of the present application, and FIG. 11 is a sectional view of FIG. 10 along CC'. The first light blocking layer 31 further includes a third sub-light blocking part 312, and the second light blocking layer 32 further includes a fourth sub-light blocking part 322. Along the second preset direction X12 parallel to the plane in which the substrate 1 is located, the third sub-light blocking part 312 is located on the side of the first opening 41 away from the first light emitting unit 21; the fourth sub-light blocking part 322 is located on the side of the second opening 42 away from the first light emitting unit 32, and the second preset direction X12 intersects the first preset direction X11. FIG. 10 takes the second preset direction X12 and the first preset direction X11 being perpendicular as an example.

[0101] As shown in FIG. 10 and FIG. 11, along the second preset direction X12, the third sub-light-blocking portion 312 includes a fifth edge E13 close to the first light-emitting unit 21, and the fourth sub-light-blocking portion 322 includes a sixth edge E23 close to the first light-emitting unit 21; the shortest distance between the fifth edge E13 and the first light-emitting unit 21 is d5, the shortest distance between the sixth edge E23 and the first light-emitting unit 21 is d6, and along the direction perpendicular to the plane where the substrate 1 is located, the shortest distance between the surface of the fourth sub-light-blocking portion 322 away from the substrate 1 and the surface of the first light-emitting unit 21 away from the substrate 1 is h3. The first light-emitting unit 21 can include a first electrode, a light-emitting layer and a second electrode which are stacked. The surface of the first light-emitting unit 21 away from the substrate 1 can be the surface of the light-emitting layer in the first light-emitting unit 21 away from the substrate 1. The length of the third opening 43 along the second preset direction X12 is a2.

[0102] In the embodiment of the present application, d6+a2≤tan(arcsin(n2×sinθ / n1))×h3; θ is the maximum viewing angle in the privacy mode, for example, for display panels with different privacy requirements, θ can be 28°, 30° or 45°. n1 is the refractive index of the panel, and n2 is the refractive index of air. The panel refractive index can be understood as the equivalent refractive index of the plurality of film layers in the display panel located on the side of the first light-emitting unit 21 close to the light-emitting side of the display panel. Based on this setting mode, the emission angle of the light emitted by the first light-emitting unit 21 and emitted through the second opening 42 toward the second preset direction X12 is less than or equal to θ, and the light emitted by the first light-emitting unit 21 toward the second preset direction X12 and having an emission angle greater than θ is directed to the fourth sub-light-blocking portion 322 or the third sub-light-blocking portion 312 to be blocked by the fourth sub-light-blocking portion 322 or the third sub-light-blocking portion 312, thereby meeting the privacy viewing angle requirement of the display panel in the up-down direction.

[0103] Optionally, n1 can be 1.42, n2 can be 1, and θ can be 45°, in which case, calculation can be obtained: d6+a2≤tan30°×h3. Based on this setting mode, the emission angle of the light emitted by the first light-emitting unit 21 and emitted through the second opening 42 is less than or equal to 45°.

[0104] It should be noted that the above d6 can be positive or negative, and in the case of negative d6, it indicates that the orthogonal projection of the sixth edge E23 on the plane of the substrate 1 is located within the third opening 43.

[0105] For example, the first preset direction X11 can correspond to the left or right orientation of the display panel. The second preset direction X12 can correspond to the upper or lower orientation of the display panel.

[0106] In an optional embodiment, the display panel can be used for a vehicle display screen, in which case the first preset direction X11 can be approximately parallel to the arrangement direction of the main driver seat and the co-driver seat. In the privacy mode, the first light-blocking sub-region 311 and the second light-blocking sub-region 321 can avoid the display content of the vehicle display screen at the co-driver seat from interfering with the driver at the main driver seat, thereby improving the driving safety. The second preset direction X12 can be the vertical direction of the display panel, which is approximately parallel to the arrangement direction of the vehicle display screen and the windshield. In the privacy mode, the third light-blocking sub-region 312 and the fourth light-blocking sub-region 322 can avoid the display content of the vehicle display screen at the co-driver seat from being reflected by the windshield into the eyes of the driver, thereby improving the driving safety.

[0107] Optionally, the present embodiment can set d6≥0. Optionally, the present embodiment can set d6=0. That is, the sixth edge E23 is coincident with the edge of the first light-emitting unit 21 in the orthogonal projection of the plane where the substrate 1 is located.

[0108] For example, as shown in FIGS. 10 and 11, along the second preset direction X12, the fourth light-blocking sub-region 322 includes a seventh edge E24 away from the first light-emitting unit 21, and the shortest distance between the seventh edge E24 and the fifth edge E13 is d57,

[0109] As shown in FIG. 11, along the second preset direction X12, the third opening 43 includes a second opening edge EK2 away from the fifth edge E13, and the maximum angle between the line connecting the second opening edge EK2 and the seventh edge E24 and the normal line of the substrate 1 is a2.

[0110] Along the direction perpendicular to the plane where the substrate 1 is located, the shortest distance between the surface of the third light-blocking sub-region 312 away from the substrate 1 and the surface of the fourth light-blocking sub-region 322 away from the substrate 1 is h34.

[0111] In the present embodiment, d57≥h34×tan a2. Based on this arrangement, the third light-blocking sub-region 312 and the fourth light-blocking sub-region 322 can absorb more large-angle light emitted by the first light-emitting unit 21 toward the second preset direction X12, so as to ensure that the large-angle light emitted by the first light-emitting unit 21 toward the second preset direction X12 cannot be emitted from between the third light-blocking sub-region 312 and the fourth light-blocking sub-region 322, thereby improving the privacy effect of the display panel in the second preset direction X12.

[0112] For example, as shown in FIG. 12, which is an enlarged schematic view of another light emitting element according to an embodiment of the present application, the embodiment of the present application can further comprise a fifth sub-light-blocking portion 313 and a sixth sub-light-blocking portion 314 in the first light-blocking layer 31, and a seventh sub-light-blocking portion 323 and an eighth sub-light-blocking portion 324 in the second light-blocking layer 32. Along a third preset direction X13, the fifth sub-light-blocking portion 313 is located on a side of the first opening 41 away from the first light emitting unit 21, and the seventh sub-light-blocking portion 323 is located on a side of the second opening 42 away from the first light emitting unit 21. Along a fourth preset direction X14, the sixth sub-light-blocking portion 314 is located on a side of the first opening 41 away from the first light emitting unit 21, and the eighth sub-light-blocking portion 324 is located on a side of the second opening 42 away from the first light emitting unit 21. For example, the third preset direction X13 can be the opposite direction of the first preset direction X11. The fourth preset direction X14 can be the opposite direction of the second preset direction X12. Based on this arrangement, the first sub-light-blocking portion 311, the third sub-light-blocking portion 312, the fifth sub-light-blocking portion 313, and the sixth sub-light-blocking portion 314 surround the first opening 41, and the second sub-light-blocking portion 321, the fourth sub-light-blocking portion 322, the seventh sub-light-blocking portion 323, and the eighth sub-light-blocking portion 324 surround the second opening 42, so that the display panel also has a large viewing angle privacy effect in the third preset direction X13 and the fourth preset direction X14, i.e., the display panel achieves multi-directional privacy.

[0113] In the embodiment of the present application, as shown in FIG. 1, the display panel 100 comprises a plurality of light emitting element groups 20, and each light emitting element group 20 comprises a first color sub-light emitting element 201, a second color sub-light emitting element 202, and a third color sub-light emitting element 203. In the same light emitting element group 20, as shown in FIG. 2, the third color sub-light emitting element 203 and the first color sub-light emitting element 201 are arranged along a first direction X21, and the third color sub-light emitting element 203 and the second color sub-light emitting element 202 are arranged along the first direction X21. The first color sub-light emitting element 201 and the second color sub-light emitting element 202 are arranged along a second direction X22, and the first direction X21 and the second direction X22 intersect.

[0114] In the embodiment of the present application, at least one of the first color sub-light emitting element 201, the second color sub-light emitting element 202, and the third color sub-light emitting element 203 comprises a first light emitting unit 21 and a second light emitting unit 22.

[0115] For example, the first color sub-light emitting element 201 includes the first light emitting unit 21 and the second light emitting unit 22, or the second color sub-light emitting element 202 includes the first light emitting unit 21 and the second light emitting unit 22, or the third color sub-light emitting element 203 includes the first light emitting unit 21 and the second light emitting unit 22, or the first color sub-light emitting element 201 and the second color sub-light emitting element 202 both include the first light emitting unit 21 and the second light emitting unit 22, or the second color sub-light emitting element 202 and the third color sub-light emitting element 203 both include the first light emitting unit 21 and the second light emitting unit 22, or the first color sub-light emitting element 201 and the third color sub-light emitting element 203 both include the first light emitting unit 21 and the second light emitting unit 22. Or, the first color sub-light emitting element 201, the second color sub-light emitting element 202 and the third color sub-light emitting element 203 all include the first light emitting unit 21 and the second light emitting unit 22.

[0116] FIG. 1 takes the first color sub-light emitting element 201, the second color sub-light emitting element 202 and the third color sub-light emitting element 203 all including the first light emitting unit 21 and the second light emitting unit 22 as an example.

[0117] It should be noted that the first light emitting unit 21 and the second light emitting unit 22 in the first color sub-light emitting element 201 both emit light of the first color, the first light emitting unit 21 and the second light emitting unit 22 in the second color sub-light emitting element 202 both emit light of the second color, and the first light emitting unit 21 and the second light emitting unit 22 in the third color sub-light emitting element 203 both emit light of the third color.

[0118] For example, as shown in FIG. 2, the embodiment of the present application can make the first direction X21 parallel to the first preset direction X11 and the second direction X22 parallel to the second preset direction X12.

[0119] When the first light emitting unit 21 and the second light emitting unit 22 are arranged, for example, as shown in FIG. 1, FIG. 2 and FIG. 10, in the same light emitting element 2, the embodiment of the present application can arrange the first light emitting unit 21 and the second light emitting unit 22 along the first direction X21. In this case, as shown in FIG. 2 and FIG. 10, along the first direction X21, the first sub-light blocking part 311 and the second sub-light blocking part 312 are located between the first light emitting unit 21 and the second light emitting unit 22, and the display panel has a peep-proof effect in the first direction X21. As shown in FIG. 10, along the second direction X22, the third sub-light blocking part 312 and the fourth sub-light blocking part 322 are respectively located on the side of the first opening 41 and the second opening 42 away from the first light emitting unit 22, and the display panel has a peep-proof effect in the second direction X22.

[0120] In addition to the case that the first light emitting unit 21 and the second light emitting unit 22 in the same light emitting element 2 are arranged along the first direction X21 as shown in FIG. 1 and FIG. 10, as shown in FIG. 13, which is an enlarged schematic view of a light emitting element group provided by an embodiment of the present application, the first light emitting unit 21 and the second light emitting unit 22 in the same light emitting element 2 are arranged along the second direction X22.

[0121] Based on the arrangement, the first sub-light blocking part 311 and the second sub-light blocking part 321 are arranged on one side of the first light emitting unit 21 along the first direction X21, so as to meet the requirement of the display panel 100 in the first direction X21, while the length of the first sub-light blocking part and the second sub-light blocking part on both sides of the second light emitting unit 22 along the first direction X21 can be shortened, or even the first sub-light blocking part and the second sub-light blocking part on both sides of the second light emitting unit 22 along the first direction X21 can be avoided, as shown in FIG. 13, wherein the first sub-light blocking part and the second sub-light blocking part can not be arranged on both sides of the second light emitting unit 22 of the second color sub-light emitting element 202 along the first direction X21, and in the sharing mode, the large-angle light emitted by the second light emitting unit 22 towards the first direction X21 can be more emitted without being blocked by the first sub-light blocking part and the second sub-light blocking part, which is beneficial to improve the sharing effect of the display panel in the first direction X21.

[0122] FIG. 13 takes the display panel having the privacy effect in the first preset direction X11 and the third preset direction X13 as an example, or as shown in FIG. 14, which is an enlarged schematic view of another light emitting element group provided by an embodiment of the present application, when the first light emitting unit 21 and the second light emitting unit 22 in the same light emitting element 2 are arranged along the second direction X22, the third sub-light blocking part 312 and the fourth sub-light blocking part 322 can also be arranged on one side of the first light emitting unit 21 along the second direction X22, so as to make the display panel have the privacy effect in the second direction X22.

[0123] For example, as shown in FIG. 15 and FIG. 16, FIG. 15 is an enlarged schematic view of another light emitting element group provided by an embodiment of the present application, and FIG. 16 is an enlarged schematic view of another display panel provided by an embodiment of the present application, in FIG. 15, the same light emitting element 2 includes at least two first light emitting units 21, and along the second direction X22, the second light emitting unit 22 and the at least two first light emitting units 21 belonging to the same light emitting element 2 at least partially overlap. In FIG. 16, a plurality of light emitting element groups 20 as shown in FIG. 15 are arranged in the first direction X11 and the second direction X12.

[0124] In the embodiment of the present application, the thickness of the first light-blocking layer 31 and the second light-blocking layer 32 is related to the length of the first light-emitting unit 21 in the direction with the need of the anti-peeping. As an example, the first light-emitting unit 21 has the need of the anti-peeping in the first preset direction X11 and the third preset direction X13, and the first preset direction X11 is parallel to the first direction X21. The greater the length of the first light-emitting unit 21 in the first direction X11, the greater the thickness of the first sub-light-blocking part 311 and the second sub-light-blocking part 312 required for the anti-peeping, and the higher the requirement for the manufacturing process of the first sub-light-blocking part 311 and the second sub-light-blocking part 312. In the embodiment of the present application, at least two first light-emitting units 21 are arranged in the same light-emitting element 2, and the second light-emitting unit 22 and the at least two first light-emitting units 21 belonging to the same light-emitting element 2 at least partially overlap along the second direction X22. Compared with the way of arranging only one first light-emitting unit 21, the length of the single first light-emitting unit 21 in the first direction X11 can be reduced, thereby reducing the thickness of the first sub-light-blocking part 311 and the second sub-light-blocking part 312 required for the anti-peeping, and reducing the manufacturing process difficulty of the display panel.

[0125] For example, in the embodiment of the present application, the area of the third opening 43 is less than or equal to the area of the fourth opening 44, so as to ensure that the display panel has a larger light-emitting area in the sharing mode, thereby ensuring the brightness in the sharing mode. In addition, the thickness of the first light-blocking layer 31 and the second light-blocking layer 32 required for the anti-peeping is reduced, and the manufacturing process difficulty of the display panel is reduced.

[0126] Optionally, as shown in FIG. 17, which is a cross-sectional view of FIG. 15 along DD', the first light-emitting unit 21 includes the first electrode 11, the second electrode 12 and the light-emitting layer 13. For example, the first electrode 11 includes an anode, and the second electrode 12 includes a cathode. In the embodiment of the present application, the first electrodes 11 of at least two adjacent first light-emitting units 21 are electrically connected, so that the two first light-emitting units 21 can be turned on or turned off at the same time, thereby simplifying the circuit design of the display panel. For example, the first electrodes 11 of the two first light-emitting units 21 can be connected to the same pixel driving circuit.

[0127] As shown in FIG. 18, the first light emitting unit 21 of the first color sub light emitting element 201 is located on one side of the second light emitting unit 22 of the first color sub light emitting element 201 close to the first light emitting unit 21 of the second color sub light emitting element 202; the first light emitting unit 21 of the second color sub light emitting element 202 is located on one side of the second light emitting unit 22 of the second color sub light emitting element 202 close to the first light emitting unit 21 of the first color sub light emitting element 201; based on the arrangement mode, the first light emitting unit 21 of the first color sub light emitting element 201 and the first light emitting unit 21 of the second color sub light emitting element 202 are both located between the second light emitting unit 22 of the first color sub light emitting element 201 and the second light emitting unit 22 of the second color sub light emitting element 202. As shown in FIG. 18, the display panel has the need of anti-peeping in the first preset direction X11 and the third preset direction X13, and the first preset direction X11 is parallel to the first direction X21 as an example, when the first sub light blocking part 311 and the second sub light blocking part 321 are arranged to realize large viewing angle anti-peeping in the first preset direction X11, the arrangement mode of the light emitting units shown in FIG. 18 can reduce the length of the first sub light blocking part 311 and the second sub light blocking part 321 located on both sides of the first preset direction X11 of the second light emitting unit 22 of the first color sub light emitting element 201, so as to weaken the influence of the first sub light blocking part 311 and the second sub light blocking part 321 on the light emission of the second light emitting unit 22 of the first color sub light emitting element 201, and improve the display effect in the sharing mode. In addition, the length of the first sub light blocking part 311 and the second sub light blocking part 321 located on both sides of the first preset direction X11 of the second light emitting unit 22 of the second color sub light emitting element 202 can be reduced, so as to weaken the influence of the first sub light blocking part 311 and the second sub light blocking part 321 on the light emission of the second light emitting unit 22 of the second color sub light emitting element 202, and improve the display effect in the sharing mode.

[0128] As shown in FIG. 18, the first preset direction X11 of the first light emitting unit 21 of the first color sub light emitting element 201 can not be provided with the first light blocking layer and the second light blocking layer, and the first preset direction X11 of the second light emitting unit 22 of the second color sub light emitting element 202 can not be provided with the first light blocking layer and the second light blocking layer.

[0129] As shown in FIG. 18, the first light emitting unit 21 of the third color sub light emitting element 203 and the first light emitting unit 21 of the first color sub light emitting element 201 at least partially overlap in the first direction X21, based on the arrangement mode, the first light blocking layer 31 and the second light blocking layer 32 located between the two can simultaneously block the large viewing angle light emitted by the two, which is conducive to simplifying the structure of the display panel.

[0130] As shown in FIG. 18, the second light emitting unit 22 of the third color sub-light emitting element 203 and the second light emitting unit 22 of the second color sub-light emitting element 202 at least partially overlap in the first direction X21. No first light blocking layer and second light blocking layer are arranged between the two to ensure that the light emitted by the two is not affected by the first light blocking layer and the second light blocking layer, and the display effect in the sharing mode is improved.

[0131] In addition to at least partially overlapping the first light emitting unit 21 of the first color sub-light emitting element 201 in the first direction X21, the first light emitting unit 21 of the third color sub-light emitting element 203 may, for example, at least partially overlap the first light emitting unit 21 of the second color sub-light emitting element 202 in the first direction X21, as shown in FIG. 19, which is an enlarged schematic view of another light emitting element group provided by an embodiment of the present application. In this way, the first light blocking layer 31 and the second light blocking layer 32 arranged between the two can simultaneously block the large viewing angle light emitted by the two, which is conducive to simplifying the structure of the display panel.

[0132] Optionally, as shown in FIG. 20 and FIG. 21, the display panel further comprises a first light adjusting portion 61, which at least partially overlaps the first light emitting unit 21 in a direction perpendicular to the plane in which the substrate 1 is located. As shown in FIG. 21, the included angle between the side surface S611 and the bottom surface S612 of the first light adjusting portion 61 is an acute angle. The bottom surface of the first light adjusting portion 61 is the surface of the side of the first light adjusting portion 61 close to the substrate 1. The first light adjusting portion 61 can adjust the large angle light emitted by the first light emitting unit 21 to small angle light, as shown by the light ray L7 in FIG. 21. The arrangement of the first light adjusting portion 61 can reduce the light intensity of the large angle light emitted by the first light emitting unit 21, achieve large viewing angle privacy, and improve the brightness of the display panel at the normal viewing angle.

[0133] For example, as shown in FIG. 21, the display panel further comprises a first protective layer 71 at least partially covering the first light adjusting portion 61. In an embodiment of the present application, the refractive index of the first protective layer 71 is less than the refractive index of the first light adjusting portion 61. For the large angle light L7 emitted by the first light emitting unit 21, when it is incident on the interface between the first light adjusting portion 61 and the first protective layer 71, according to the law of refraction, the light ray will be deflected and exit the display panel as a small angle light, thereby reducing the light intensity of the large angle light emitted by the first light emitting unit 21 and improving the brightness of the display panel at the normal viewing angle.

[0134] Exemplarily, as shown in FIG. 20 and FIG. 21, the first light adjusting portion 61 can at least partially cover the first light emitting unit 21 in the projection of the substrate 1. Alternatively, the first light adjusting portion 61 can have the same shape as the first light emitting unit 21 in the projection of the substrate 1.

[0135] When the display panel has a need for privacy in the first direction X11, the first light emitting unit 21 can have a length a2 in the second direction X22 greater than a length a1 in the first direction X21. Based on this arrangement, when the first light adjusting portion 61 is arranged, the first light adjusting portion 61 can have a length in the second direction X22 greater than a length in the first direction X21, i.e., the side surface S611 of the first light adjusting portion 61 can have a greater length in the second direction X22, so that the side surface S611 of the first light adjusting portion 61 can receive more large-angle light and adjust the large-angle light to small-angle light to be emitted out of the display panel.

[0136] Alternatively, as shown in FIG. 22 and FIG. 23, FIG. 22 is an enlarged schematic view of another light emitting element provided by the embodiment of the present application, and FIG. 23 is a schematic view of a cross section of FIG. 22 along FF'. The display panel further includes a second light adjusting portion 62, which at least partially overlaps the second light emitting unit 22 in a direction perpendicular to the substrate 1. As shown in FIG. 23, the side surface S621 of the second light adjusting portion 62 and the bottom surface S622 form an acute angle. The bottom surface of the second light adjusting portion 62 is the surface of the second light adjusting portion 62 close to the substrate 1. The second light adjusting portion 62 can adjust the large-angle light emitted by the second light emitting unit 22 to small-angle light to be emitted out, as shown by the light L8 in FIG. 23.

[0137] Exemplarily, as shown in FIG. 23, the display panel further includes a second protective layer 72 at least partially covering the second light adjusting portion 62, and the refractive index of the second protective layer 72 is less than the refractive index of the second light adjusting portion 62. For the large-angle light L8 emitted by the second light emitting unit 22, when the light L8 is incident on the interface between the second light adjusting portion 62 and the second protective layer 72, according to the law of refraction, the light L8 will be deflected and emitted out of the display panel as small-angle light, so that the light intensity of the large-angle light emitted by the second light emitting unit 22 can be reduced, and the brightness of the display panel at the normal viewing angle can be improved.

[0138] As shown in FIG. 22 and FIG. 23, the second light adjusting portion 62 can at least partially cover the projection of the second light emitting unit 22 on the plane of the substrate 1. Alternatively, the shape of the projection of the second light adjusting portion 62 on the plane of the substrate 1 can be the same as the shape of the projection of the second light emitting unit 22 on the plane of the substrate 1.

[0139] When the display panel is applied to a vehicle display screen, the first direction X21 can be the direction between the driver and the front passenger in a vehicle, and the second direction X22 can be the direction between the vehicle display screen and the windshield. In this scenario, the second light adjusting portion 62 corresponding to the second light emitting unit 22 is provided, and the length a3 of the second light emitting unit 22 in the first direction X21 is greater than or equal to the length a4 of the second light emitting unit 22 in the second direction X22, so that the length of the second light adjusting portion 62 in the second direction X22 is greater than or equal to the length in the first direction X21, i.e., the length of the portion of the side surface S621 of the second light adjusting portion 62 extending in the first direction X21 is greater, so that the portion of the side surface S621 extending in the first direction X21 can receive more large-angle light and adjust the large-angle light to small-angle light to be emitted from the display panel. That is, the second light adjusting portion 62 can greatly weaken the large-angle light intensity of the vehicle display screen emitted to the side of the windshield, so as to avoid the reflected light of the windshield affecting the display of the vehicle driver, and improve the driving safety.

[0140] Alternatively, as shown in FIG. 24, which is a cross-sectional view of another display panel provided by the present application, the display panel further comprises a third light blocking layer 33 located on the side of the second light blocking layer 32 away from the substrate 1, and the third light blocking layer 33 comprises a fifth opening 45; the fifth opening 45 at least partially overlaps the first light emitting unit 21 in the direction perpendicular to the plane of the substrate 1; the area of the first opening 41 is greater than the area of the fifth opening 45, the area of the second opening 42 is greater than the area of the fifth opening 45, and the projection of the third light blocking layer 33 on the plane of the substrate 1 at least partially covers the edge of the first opening 41. The projection of the third light blocking layer 33 on the plane of the substrate 1 at least partially covers the edge of the second opening 42.

[0141] In the privacy mode, the first light emitting unit 21 is lit, and the small-angle light emitted by the first light emitting unit 21 can be emitted from the display panel in sequence through the first opening 41, the second opening 42 and the fifth opening 45, so that a viewer in a small viewing angle, such as a viewer in a normal viewing angle, can watch the display. The large-angle light emitted by the first light emitting unit 21 can be blocked by the third light blocking layer 33, the second light blocking layer 32 or the first light blocking layer 31 and cannot be emitted from the display panel, thereby realizing the large viewing angle privacy effect of the display panel.

[0142] In the sharing mode, the light emitted by the second light emitting unit 22 can avoid the first light blocking layer 31, the second light blocking layer 32 and the third light blocking layer 33 and be emitted out, so that the viewers in the normal viewing angle and the large viewing angle can watch the display picture, and the picture sharing effect is realized.

[0143] As shown in FIG. 25, which is an enlarged schematic view of another light emitting element provided in the embodiment of the present application, the display panel further comprises a partition 8 between the first light emitting unit 21 and the second light emitting unit 22. The partition 8 can reduce the lateral leakage current between the first light emitting unit 21 and the second light emitting unit 22, avoid the situation that the first light emitting unit 21 or the second light emitting unit 22 is brightened, and improve the display effect in different display modes.

[0144] For example, in the embodiment of the present application, the partition 8 and at least one of the first sub-light blocking part 311 and the second sub-light blocking part 321 overlap each other, so as to make full use of the space between the two adjacent light emitting units and improve the resolution of the display panel.

[0145] As shown in FIG. 26, which is a sectional view of FIG. 25 along GG', at least one of the first light emitting unit 21 and the second light emitting unit 22 comprises a first electrode 11, a light emitting layer 13, a second electrode 12 and a common layer 14. The partition 8 is located on the side of the common layer 14 close to the substrate 1. Optionally, the common layer 14 comprises a first sub-common layer 141 and a second sub-common layer 142, the first sub-common layer 141 is located between the first electrode 11 and the light emitting layer 13, and the second sub-common layer 142 is located between the second electrode 12 and the light emitting layer 13. Optionally, the common layer 14 can be prepared by using a common mask. The light emitting layer 13 can be prepared by using a fine metal mask (FMM).

[0146] In the embodiment of the present application, the first electrode 11 of the first light emitting unit 21 and the first electrode 11 of the second light emitting unit 22 are independent of each other, and the second electrode 12 of the first light emitting unit 21 and the second electrode 12 of the second light emitting unit 22 can be electrically connected to each other.

[0147] Optionally, the first electrode 11 comprises an anode, and the second electrode 12 comprises a cathode. The first sub-common layer 141 comprises a hole injection layer and / or a hole transport layer. The second sub-common layer 142 comprises an electron injection layer and / or an electron transport layer.

[0148] As shown in FIG. 26, the partition 8 includes a protruding portion 801 protruding towards the side away from the substrate 1, and optionally, the protruding portion 801 includes a first side surface S11 and a first bottom surface S12 close to the side of the substrate 1. The embodiment of the present application can make the included angle between the first side surface S11 and the first bottom surface S12 towards the inside of the protruding portion 801 an obtuse angle, that is, the area of the side of the protruding portion 801 away from the substrate 1 is greater than the area of the side close to the substrate 1. Based on this setting mode, the common layer 14 formed after the protruding portion 801 will not be formed (or continuously formed) on the first side surface S11 to be broken at the protruding portion 801, so as to block the path of the lateral leakage current through the common layer 14 to transmit between the adjacent first light emitting unit 21 and the second light emitting unit 22, so as to inhibit the transmission of the lateral leakage current and improve the display effect. For example, in the privacy mode, the lateral leakage current can be prevented from transmitting to the second light emitting unit 22, so as to avoid the case that the second light emitting unit 22 is lightened.

[0149] In another optional embodiment, as shown in FIG. 27, which is another cross-sectional view of FIG. 25 along GG', the embodiment of the present application can also make the included angle between the first side surface S11 and the first bottom surface S12 towards the inside of the protruding portion 801 an acute angle, that is, the area of the side of the protruding portion 801 away from the substrate 1 is less than the area of the side close to the substrate 1. Based on this setting mode, the common layer 14 formed after the protruding portion 801 is formed on the first side surface S11, and based on the topographic characteristics of the protruding portion 801, the path of the lateral leakage current through the common layer 14 to transmit between the adjacent two sub-pixels can be prolonged, so as to inhibit the transmission of the lateral leakage current and improve the display effect.

[0150] In yet another optional embodiment, as shown in FIG. 28, which is yet another cross-sectional view of FIG. 25 along GG', the partition 8 includes a recessed portion 802 recessed towards the side of the substrate 1, and the recessed portion 802 includes a second side surface S21 and a second bottom surface S22 close to the side of the substrate 1. As shown in FIG. 28, the included angle between the second side surface S21 and the second bottom surface S22 is an obtuse angle. Based on this setting mode, the common layer 14 formed after the recessed portion 802 is formed on the second side surface S21 of the recessed portion 802, and based on the topographic characteristics of the recessed portion 802, the path of the lateral leakage current through the common layer 14 to transmit between the adjacent two sub-pixels can be prolonged, so as to inhibit the transmission of the lateral leakage current and improve the display effect.

[0151] In yet another alternative embodiment, as shown in FIG. 29, which is another cross-sectional view of FIG. 25 along GG', the angle between the second side surface S21 and the second bottom surface S22 can also be an acute angle. Based on this arrangement, the common layer 14 formed after the recess 802 will not be formed on the second side surface S21 and thus be broken at the recess 802, which can block the path of the lateral leakage current through the common layer 14 between two adjacent sub-pixels 2, thereby inhibiting the transmission of the lateral leakage current and improving the display effect.

[0152] For example, as shown in FIG. 28 and FIG. 29, the recess 802 can be formed in the pixel definition layer 5.

[0153] Based on the same inventive concept, the present application also provides a display device, as shown in FIG. 30, which is a schematic view of a display device provided by the present application, the display device comprising the display panel 100 described above. The specific structure of the display panel 100 has been described in detail in the above embodiments, which will not be repeated here. Of course, the display device shown in FIG. 30 is only for illustrative purposes. The display device can be any device with display function, such as a mobile phone, a tablet computer, a notebook computer, an e-paper, a television, a smart watch, etc. When the display panel is applied to a vehicle, such as a car, a ship or an airplane, as a display screen, it can be independent of the inherent structure of the vehicle, or it can be a local structure integrated with other structural components of the vehicle, for example, it can be integrated with the front windshield or the table around the instrument panel, and the present application is not limited thereto.

[0154] The above only describes the preferred embodiments of the present application and should not be used to limit the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the scope of protection of the present application.

Claims

1. A display panel, characterized by, The display panel comprises: a substrate; a plurality of light-emitting elements located on one side of the substrate, the light-emitting elements comprising a first light-emitting unit and a second light-emitting unit; a first light-blocking layer located on a side of the first light-emitting unit away from the substrate, the first light-blocking layer comprising a first opening; a second light-blocking layer located on a side of the first light-blocking layer away from the substrate, the second light-blocking layer comprising a second opening; in a direction perpendicular to the plane in which the substrate lies, the first opening and the second opening at least partially overlap the first light-emitting unit; and the area of the first opening is greater than the area of the second opening, and the normal projection of the second light-blocking layer on the plane in which the substrate lies at least partially covers the edge of the first opening.

2. The display panel of claim 1, wherein: the working mode of the display panel comprises a sharing mode and a privacy mode; in the sharing mode, the second light-emitting unit is lit; in the privacy mode, the first light-emitting unit is lit and the second light-emitting unit is turned off.

3. The display panel of claim 1, wherein: the first light-blocking layer comprises a first sub-light-blocking portion, and the second light-blocking layer comprises a second sub-light-blocking portion; in a first preset direction parallel to the plane in which the substrate lies, the first sub-light-blocking portion comprises a first edge close to the first light-emitting unit, and the second sub-light-blocking portion comprises a second edge close to the first light-emitting unit; in the first preset direction, the shortest distance between the second edge and the first light-emitting unit is d3; in a direction perpendicular to the plane in which the substrate lies, the shortest distance between the surface of the second sub-light-blocking portion away from the substrate and the surface of the first light-emitting unit away from the substrate is h1; the display panel comprises a pixel definition layer, the pixel definition layer comprising a third opening and a fourth opening, at least part of the first light-emitting unit being located in the third opening, and at least part of the second light-emitting unit being located in the fourth opening; in the first preset direction, the length of the third opening is a1; wherein d3+a1≤tan(arcsin(n2×sinθ / n1))×h1; θ is the maximum visible angle in the privacy mode, n1 is the refractive index of the panel, and n2 is the refractive index of air.

4. The display panel of claim 3, wherein:

5. The display panel of claim 3, wherein: d3≥0。 in the first preset direction, the second sub-light-blocking portion comprises a third edge away from the first light-emitting unit, and the shortest distance between the first edge and the third edge is d13; in the first preset direction, the third opening comprises a first opening edge away from the first edge, and the maximum included angle between the line connecting the first opening edge and the third edge and the normal of the substrate is α1; in a direction perpendicular to the plane in which the substrate lies, the shortest distance between the surface of the first sub-light-blocking portion away from the substrate and the surface of the second sub-light-blocking portion away from the substrate is h12, wherein d13≥h12×tanα1.

6. The display panel of claim 1, wherein: ​ The pixel definition layer comprises a third opening and a fourth opening, at least part of the first light emitting unit is located in the third opening, and at least part of the second light emitting unit is located in the fourth opening; The first light blocking layer comprises a first sub-light blocking part, and the second light blocking layer comprises a second sub-light blocking part; The first light emitting unit and the second light emitting unit are arranged along the first preset direction; along the first preset direction, a minimum distance between a third edge of the second sub-light blocking part and the second light emitting unit is d2, and a shortest distance between the first sub-light blocking part and the fourth opening is d4, Along a direction perpendicular to a plane where the substrate is located, a shortest distance between a surface of the substrate away from the second sub-light blocking part and a surface of the substrate away from the first light emitting unit is h1, and a shortest distance between the surface of the substrate away from the second light emitting unit and the surface of the substrate away from the first sub-light blocking part is h2, wherein, d4≥d2×h2 / h1.

7. The display panel of claim 6, wherein, along the first preset direction, a width of the fourth opening is a2; a2+d2≥tan(arcsin(n2×sinβ / n1))×h1, wherein β is a maximum visual angle in a sharing mode, n1 is a panel refractive index, and n2 is an air refractive index.

8. The display panel of claim 1, wherein, the first light blocking layer comprises a third sub-light blocking part, and the second light blocking layer comprises a fourth sub-light blocking part; along a second preset direction parallel to a plane where the substrate is located, the fourth sub-light blocking part comprises a sixth edge close to the first light emitting unit; along the second preset direction, a shortest distance between the sixth edge and the first light emitting unit is d6; along a direction perpendicular to the plane where the substrate is located, a distance between a surface of the substrate away from the fourth sub-light blocking part and a surface of the substrate away from the first light emitting unit is h3, the display panel further comprises a pixel definition layer, the pixel definition layer comprises a third opening and a fourth opening, at least part of the first light emitting unit is located in the third opening, and at least part of the second light emitting unit is located in the fourth opening; along the second preset direction, a length of the third opening is a2; wherein, d6+a2≤tan(arcsin(n2×sinθ / n1))×h3; θ is a maximum visual angle in a privacy mode, n1 is a panel refractive index, and n2 is an air refractive index.

9. The display panel of claim 8, wherein, d6≥0。 10. The display panel of claim 8, wherein, along the second preset direction, the third sub-light blocking part comprises a fifth edge close to the first light emitting unit, and the fourth sub-light blocking part comprises a seventh edge away from the first light emitting unit; along the second preset direction, a shortest distance between the seventh edge and the fifth edge is d57; In the second preset direction, the third opening comprises a second opening edge away from the fifth edge, and a maximum included angle between a line connecting the second opening edge and the seventh edge and a normal line of the substrate is α2; In a direction perpendicular to a plane where the substrate is located, a shortest distance between the third sub-light-blocking portion away from a surface of the substrate and the fourth sub-light-blocking portion away from the surface of the substrate is h34, wherein, d57≥h34×tanα2.

11. The display panel of claim 1, wherein: the display panel comprises a plurality of light emitting element groups, and each of the light emitting element groups comprises a first color sub-light emitting element, a second color sub-light emitting element and a third color sub-light emitting element; in the same light emitting element group, the third color sub-light emitting element and the first color sub-light emitting element are arranged along a first direction, the third color sub-light emitting element and the second color sub-light emitting element are arranged along the first direction, and the first color sub-light emitting element and the second color sub-light emitting element are arranged along a second direction, and the first direction and the second direction intersect each other; at least one of the first color sub-light emitting element, the second color sub-light emitting element and the third color sub-light emitting element comprises the first light emitting unit and the second light emitting unit.

12. The display panel of claim 11, wherein: in the same light emitting element, the first light emitting unit and the second light emitting unit are arranged along the first direction.

13. The display panel of claim 11, wherein: in the same light emitting element, the first light emitting unit and the second light emitting unit are arranged along the second direction.

14. The display panel of claim 13, wherein: the same light emitting element comprises at least two first light emitting units, and in the second direction, the second light emitting unit and the at least two first light emitting units belonging to the same light emitting element at least partially overlap each other.

15. The display panel of claim 14, wherein: the first light emitting unit comprises a first electrode, and the first electrodes of at least two adjacent first light emitting units are electrically connected.

16. The display panel of claim 11, wherein: the first light emitting unit of the first color sub-light emitting element is located on a side of the second light emitting unit of the first color sub-light emitting element close to the first light emitting unit of the second color sub-light emitting element; the first light emitting unit of the second color sub-light emitting element is located on a side of the second light emitting unit of the second color sub-light emitting element close to the first light emitting unit of the first color sub-light emitting element; the first light emitting unit of the third color sub-light emitting element and the first light emitting unit of the first color sub-light emitting element at least partially overlap each other in the first direction; the second light emitting unit of the third color sub-light emitting element and the second light emitting unit of the second color sub-light emitting element at least partially overlap each other in the first direction.

17. The display panel of claim 16, wherein, the first light emitting unit of the third color sub-light emitting element and the first light emitting unit of the second color sub-light emitting element at least partially overlap in the first direction.

18. The display panel of claim 1, wherein, a pixel definition layer is further included, the pixel definition layer comprising a third opening and a fourth opening, at least part of the first light emitting unit is located within the third opening, and at least part of the second light emitting unit is located within the fourth opening; an area of the third opening is less than or equal to an area of the fourth opening.

19. The display panel of claim 1, wherein, a first light adjusting portion is further included, the first light adjusting portion at least partially overlaps with the first light emitting unit in a direction perpendicular to a plane where the substrate is located; an included angle between a side surface and a bottom surface of the first light adjusting portion is an acute angle.

20. The display panel of claim 19, wherein, a first protective layer at least partially covering the first light adjusting portion is further included, a refractive index of the first protective layer is less than a refractive index of the first light adjusting portion.

21. The display panel of claim 1, wherein, a second light adjusting portion is further included, the second light adjusting portion at least partially overlaps with the second light emitting unit in a direction perpendicular to a plane where the substrate is located.

22. The display panel of claim 21, wherein, a second protective layer at least partially covering the second light adjusting portion is further included, a refractive index of the second protective layer is less than a refractive index of the second light adjusting portion.

23. The display panel of claim 22, wherein, a length of the second light emitting unit in the first direction is greater than or equal to a length of the second light emitting unit in the second direction.

24. The display panel of claim 1, wherein, a third light blocking layer is further included, located on a side of the second light blocking layer away from the substrate, the third light blocking layer comprising a fifth opening; in a direction perpendicular to a plane where the substrate is located, the fifth opening at least partially overlaps with the first light emitting unit; and, an area of the first opening is greater than an area of the fifth opening, a normal projection of the third light blocking layer on the plane where the substrate is located at least partially covers an edge of the first opening.

25. The display panel of claim 1, wherein, a partition portion is further included, located between the first light emitting unit and the second light emitting unit.

26. The display panel of claim 25, wherein, the partition portion comprises a recessed portion or a protruding portion.

27. A display device comprising: a display panel of any one of claims 1-26 is included.

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