Display panel, control method thereof, and display device

Abstract

This invention discloses a display panel, its control method, and a display device. The display panel includes: a substrate; a pixel definition layer located on one side of the substrate, the pixel definition layer including pixel definition portions, the pixel definition portions including multiple interconnected side surfaces; and a light-emitting unit including multiple sub-light-emitting units, the sub-light-emitting units located on at least one side surface; wherein the angle between the plane containing each side surface and the plane containing the substrate is an acute angle. The display panel provided by this application can achieve efficient light emission at specific large tilt angles.

Description

Technical Field

[0001] This application relates to the field of display technology, specifically to a display panel, its control method, and a display device. Background Technology

[0002] Organic Light Emitting Diode (OLED) display technology boasts advantages such as low energy consumption, low cost, self-emissive nature, wide viewing angle, and fast response time, making it considered one of the most promising next-generation display technologies. OLED display technology is currently widely used in high-end smartphones, televisions, smartwatches, VR (Virtual Reality) devices, and automotive displays. With the deepening development of the display industry, OLED is also gradually appearing in areas such as wide-viewing angle directional light emission and glasses-free 3D. Summary of the Invention

[0003] In view of this, embodiments of this application provide a display panel, a control method thereof, and a display device thereof.

[0004] The first aspect of this application provides a display panel, including:

[0005] Substrate; A pixel definition layer is located on one side of the substrate, and the pixel definition layer includes a pixel definition part, which includes multiple interconnected side surfaces. A light-emitting unit, comprising a plurality of sub-light-emitting units, wherein the sub-light-emitting units are located on at least one side; The angle between the plane containing each side and the plane containing the substrate is an acute angle.

[0006] In one embodiment, the number of sides is four, and at least one set of oppositely arranged sides is provided with sub-light-emitting units.

[0007] In one embodiment, the side surface includes a first side surface, a second side surface, a third side surface, and a fourth side surface connected sequentially to each other. The sub-light-emitting unit includes a first sub-light-emitting unit located on the surface of the first side surface, a second sub-light-emitting unit located on the surface of the second side surface, a third sub-light-emitting unit located on the surface of the third side surface, and a fourth sub-light-emitting unit located on the surface of the fourth side surface. The first side and the third side are arranged opposite each other along a direction parallel to the first direction, and the second side and the fourth side are arranged opposite each other along a direction parallel to the second direction; the first direction and the second direction intersect and are both parallel to the plane of the substrate. In one embodiment, the pixel defining portion includes a top surface 50 located on the side away from the substrate and parallel to the substrate, and the sub-light-emitting unit includes a fifth sub-light-emitting unit located on the surface of the top surface 50.

[0008] In one embodiment, the angle between the plane containing each side and the plane containing the substrate is greater than or equal to 20° and less than or equal to 80°.

[0009] In one embodiment, the angle between each side and the plane containing the substrate is the same.

[0010] In one embodiment, the sub-light-emitting unit includes a first electrode, a light-emitting functional layer, and a second electrode that are sequentially stacked along the direction away from the substrate.

[0011] In one embodiment, the area of ​​the first electrode is smaller than the area of ​​its side surface or its top surface 50.

[0012] In one embodiment, the first electrode is the anode and the second electrode is the cathode.

[0013] In one embodiment, the light-emitting functional layer includes a first common layer, a light-emitting layer, and a second common layer that are sequentially stacked along the direction away from the substrate.

[0014] In one embodiment, the light emission colors of each sub-light emission unit located on the same pixel definition section are the same.

[0015] In one embodiment, the light-emitting layers located on the same pixel definition section are interconnected.

[0016] In one embodiment, the first common layer of each sub-light-emitting unit located on the same pixel definition section is interconnected; and / or, the second common layer of each sub-light-emitting unit located on the same pixel definition section is interconnected.

[0017] In one embodiment, the first common layer of each sub-light-emitting unit is interconnected; and / or, the second common layer of each sub-light-emitting unit is interconnected.

[0018] In one embodiment, the second electrodes of each sub-light-emitting unit are interconnected.

[0019] In one embodiment, the pixel definition section includes a first pixel definition section and a second pixel definition section; the emission color of the sub-emission unit on the first pixel definition section is different from the emission color of the sub-emission unit on the second pixel definition section.

[0020] In one embodiment, the pixel definition section further includes a third pixel definition section, wherein the emission colors of the sub-emission units on the third pixel definition section, the emission colors of the sub-emission units on the second pixel definition section, and the emission colors of the sub-emission units on the first pixel definition section are all different.

[0021] In one embodiment, the emission color of the sub-light-emitting unit includes any one of red, green, or blue.

[0022] In one embodiment, the display panel further includes a functional structure layer located on the side of the light-emitting unit away from the substrate; the functional structure layer includes a plurality of functional structure portions disposed one-to-one with the top surface 50; the functional structure portions are used for light shielding or light transmission.

[0023] In one embodiment, the orthographic projection of the functional structure onto the substrate and the orthographic projection of the top surface 50 onto the substrate at least partially overlap; In one embodiment, the orthographic projection of the functional structure portion onto the substrate and the orthographic projection of the top surface 50 onto the substrate overlap.

[0024] In one embodiment, the material of the functional structure includes any one of light-shielding material, liquid crystal material, and electrochromic material.

[0025] In one embodiment, the display panel further includes a plurality of thin-film transistors that correspond one-to-one with and are electrically connected to the corresponding sub-light-emitting units; In one embodiment, the display panel includes an encapsulation layer located between the light-emitting unit and the functional structure layer.

[0026] In one embodiment, the encapsulation layer includes a first film layer, a second film layer, and a third film layer sequentially stacked along a direction away from the substrate.

[0027] In one embodiment, the materials of the first and third membrane layers are inorganic materials; and / or, the material of the second membrane layer is an organic material.

[0028] In one embodiment, the display panel includes an optical adhesive layer located on the side of the functional structure layer away from the substrate.

[0029] A second aspect of this application provides a control method for a display panel, applied to the aforementioned display panel, comprising: Control at least one sub-light-emitting unit corresponding to one side to emit light; or, the sub-light-emitting unit includes a fifth sub-light-emitting unit located on the surface of the top surface 50, control the sub-light-emitting units corresponding to each side to turn off, and control the fifth sub-light-emitting unit to emit light.

[0030] In one embodiment, the material of the functional structure includes a light-shielding material, and the control method for controlling the light emission of at least one sub-light-emitting unit corresponding to one side includes: controlling the first and third sub-light-emitting units to emit light and the second and fourth sub-light-emitting units to turn off by means of a thin-film transistor.

[0031] or, The material of the functional structure includes a light-shielding material, and the control method for controlling the light emission of at least one sub-light-emitting unit corresponding to one side includes: controlling the second and fourth sub-light-emitting units to emit light and the first and third sub-light-emitting units to turn off by thin-film transistor control; In one embodiment, a control method for controlling the first and third sub-light-emitting units to emit light and the second and fourth sub-light-emitting units to turn off by means of a thin-film transistor includes: the sub-light-emitting unit includes a fifth sub-light-emitting unit located on the surface of the top surface 50; and the fifth sub-light-emitting unit is turned off by means of a thin-film transistor.

[0032] In one embodiment, a control method for controlling the second and fourth sub-light-emitting units to emit light and the first and third sub-light-emitting units to turn off by means of a thin-film transistor includes: the sub-light-emitting unit includes a fifth sub-light-emitting unit located on the surface of the top surface 50; and the fifth sub-light-emitting unit is turned off by means of a thin-film transistor.

[0033] In one embodiment, the sub-light-emitting unit includes a fifth sub-light-emitting unit located on the surface of the top surface 50, and the control method for controlling the light emission of at least one sub-light-emitting unit corresponding to a side surface includes: controlling the first sub-light-emitting unit, the second sub-light-emitting unit, the third sub-light-emitting unit, the fourth sub-light-emitting unit, and the fifth sub-light-emitting unit to emit light through thin-film transistor control; or, The sub-light-emitting unit includes a fifth sub-light-emitting unit located on the surface of the top surface 50. The material of the functional structure includes liquid crystal material or electrochromic material. The control method for controlling the light emission of at least one sub-light-emitting unit corresponding to one side includes: controlling the first sub-light-emitting unit, the second sub-light-emitting unit, the third sub-light-emitting unit, the fourth sub-light-emitting unit, and the fifth sub-light-emitting unit to emit light through a thin-film transistor; and controlling the functional structure to be in a light-transmitting state.

[0034] In one embodiment, the material of the functional structure includes liquid crystal material or electrochromic material; the control method for controlling the corresponding sub-light-emitting units on each side to turn off and controlling the fifth sub-light-emitting unit to emit light includes: controlling the first, second, third, and fourth sub-light-emitting units to turn off and the fifth sub-light-emitting unit to emit light through thin-film transistor control; controlling the functional structure to be in a light-transmitting state.

[0035] In one embodiment, the material of the functional structure includes a liquid crystal material or an electrochromic material; the control method for controlling the light emission of at least one sub-light-emitting unit corresponding to one side includes: controlling the first sub-light-emitting unit and / or the third sub-light-emitting unit to emit light and the second sub-light-emitting unit and the fourth sub-light-emitting unit to turn off by controlling the functional structure to be in a light-shielding state by means of a thin film transistor. or, The material of the functional structure includes liquid crystal material or electrochromic material; the control method for controlling the light emission of at least one sub-light-emitting unit corresponding to one side includes: controlling the second sub-light-emitting unit and / or the fourth sub-light-emitting unit to emit light by means of a thin film transistor, turning off the first sub-light-emitting unit and the third sub-light-emitting unit, and controlling the functional structure to be in a light-shielding state.

[0036] A third aspect of this application provides a display device, including the display panel described above, or a display panel including the control method described above.

[0037] The beneficial effects of this application are as follows: By setting a pixel definition section including multiple interconnected sides on the pixel definition layer, and ensuring that the angle θ between the plane of each side and the plane of the substrate is an acute angle, the sub-light-emitting unit can form a pre-set large-angle directional light emission. Furthermore, by forming a pixel definition section with a pyramidal three-dimensional structure on the inherent pixel definition layer and setting a sub-light-emitting unit on at least one side, efficient light emission at a specific large tilt angle can be achieved without the need for additional optical structures such as microprisms and gratings, effectively reducing the overall thickness of the display panel and lowering assembly difficulty and production costs. In addition, the acute angle between the plane of each side and the plane of the substrate ensures that the light from the light-emitting unit located on the side can be effectively emitted. Attached Figure Description

[0038] Figure 1 This is a cross-sectional structural diagram of a display panel in the prior art; Figure 2 This is a top view of the structure of a display panel according to this application; Figure 3 This is a top view of the structure of a pixel limiting part according to this application; Figure 4 This is a cross-sectional view of the display panel in some embodiments of this application; Figure 5 This is a cross-sectional view of the display panel in some other embodiments of this application; Figure 6 This is a cross-sectional view of the display panel in some embodiments of this application; Figure 7 This is a top view of another pixel-limiting section of this application; Figure 8 This is a cross-sectional view of the display panel in some embodiments of this application; Figure 9 This is a cross-sectional view of the display panel in some embodiments of this application; Figure 10 This is a cross-sectional view of the display panel in some embodiments of this application; Figure 11 This is a cross-sectional view of the display panel in some embodiments of this application; Figure 12 This is a cross-sectional view of the display panel in some embodiments of this application; Figure 13This is a cross-sectional view of the display panel in some embodiments of this application; Figure 14 This is a cross-sectional view of the display panel in some embodiments of this application; Figure 15 This is a cross-sectional view of the display panel in some embodiments of this application; Figure 16 This is a top view of a display device according to this application.

[0039] Explanation of reference numerals in the attached figures: 10. Display panel 20. Substrate; 30. Pixel definition layer; 301. Pixel definition unit; 3011. First pixel definition unit; 3022. Second pixel definition unit; 3033. Third pixel definition unit; 40. Side view; 401. First side view; 402. Second side view; 403. Third side view; 404. Fourth side view; 50, top surface 50; 60. Light-emitting unit; 601. Sub-light-emitting unit; 6011. First sub-light-emitting unit; 6012. Second sub-light-emitting unit; 6013. Third sub-light-emitting unit; 6014. Fourth sub-light-emitting unit; 6015. Fifth sub-light-emitting unit; 70. Functional structure layer; 701. Functional structure section; 80. First electrode; 90. Light-emitting functional layer; 100. Second electrode; 901. First common layer; 902. Light-emitting layer; 903. Second common layer; 110. Thin-film transistor; 120. Encapsulation layer; 130. Optical adhesive layer; 140. Via; 150. Array layer; 200. Display device; X, first direction; Y, second direction; Z, third direction. Detailed Implementation

[0040] To enable those skilled in the art to better understand the technical solutions in the embodiments of this application, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art should fall within the protection scope of the embodiments of this application.

[0041] The terminology used in the embodiments of this application is for the purpose of describing particular embodiments only and is not intended to be limiting of this application. The singular forms “a,” “the,” and “the” used in the embodiments of this application and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the term “and / or” as used in the embodiments of this application refers to and includes any or all possible combinations of one or more associated listed items.

[0042] It should be understood that in the description of the embodiments of this application, the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing the scheme of the embodiments of this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0043] Furthermore, when an element or layer is referred to as being "on" another element or layer, "connected to," or "bonded to" another element or layer, the element or layer may be directly on the other element or layer, directly connected to, or directly bonded to the other element or layer, or there may be intermediate elements or layers. However, when an element or layer is referred to as being "directly on" another element or layer, "directly connected to," or "directly bonded to" another element or layer, there are no intermediate elements or layers.

[0044] The terms First, Second, etc., are used to describe various elements, components, regions, layers, and / or parts, but these elements, components, regions, layers, and / or parts should not be limited by these terms. These terms are used to distinguish one element, component, region, layer, and / or part from another element, component, region, layer, and / or part.

[0045] Unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0046] Figure 1 This is a cross-sectional structural diagram of a display panel 10 in the prior art. (Refer to...) Figure 1In the prior art, the pixel definition layer 30 of the display panel 10 is disposed on the substrate 20 and surrounds to form a pixel opening. The light-emitting unit 60 is located in the pixel opening. The light emission angle of each light-emitting unit 60 is limited and it is impossible to achieve light emission at a specific angle or at a large angle, thus it cannot be applied to fields such as naked-eye 3D.

[0047] The specific implementation of the embodiments of this application will be further described below with reference to the accompanying drawings.

[0048] Figure 2 This is a top view of the structure of a display panel 10 according to this application. Figure 3 This is a top view of the pixel-limiting section of this application; Figure 4 This is a cross-sectional view of the display panel 10 in some embodiments of this application; Reference Figures 2-4 A first aspect of this application provides a display panel 10, including: a substrate 20; a pixel definition layer 30, the pixel definition layer 30 being located on one side of the substrate 20, and the pixel definition layer 30 including a pixel definition portion 301, the pixel definition portion 301 including a plurality of interconnected side surfaces 40; and a light-emitting unit 60, the light-emitting unit 60 including a plurality of sub-light-emitting units 601, the sub-light-emitting units 601 being located on at least one side surface 40; wherein the angle between the plane where each side surface 40 is located and the plane where the substrate 20 is located is an acute angle.

[0049] In this embodiment, by providing a pixel definition section 301 comprising multiple interconnected side surfaces 40 on the pixel definition layer 30, and by ensuring that the angle θ between the plane containing each side surface 40 and the plane containing the substrate 20 is acute, the pixel definition section 301 forms a pyramidal three-dimensional structure. Relying on the tilted side surfaces 40 of this pyramidal three-dimensional structure, the sub-light-emitting unit 601 can achieve pre-defined large-angle directional light emission. Furthermore, by forming a pixel definition section with a pyramidal three-dimensional structure on the inherent pixel definition layer and providing a sub-light-emitting unit 601 on at least one side surface 40, efficient light emission at a specific large tilt angle can be achieved without the need for additional optical structures such as microprisms or gratings, effectively reducing the overall thickness of the display panel 10 and lowering assembly difficulty and production costs. Moreover, the acute angle between the plane containing each side surface 40 and the plane containing the substrate 20 ensures that the light from the light-emitting unit 60 located on the side surface 40 can be effectively emitted.

[0050] It should be noted that the first direction X intersects the second direction Y and is parallel to the plane where the display panel 10 is located, while the third direction Z is perpendicular to the plane where the display panel 10 is located. Furthermore, the pixel defining portion has at least three side surfaces 40; for example, Figure 3 The middle pixel limiting part has four sides 40.

[0051] Figure 5This is a cross-sectional view of the display panel 10 in some other embodiments of this application. Figure 6 This is a cross-sectional view of the display panel 10 in some embodiments of this application.

[0052] Reference Figures 2-3 as well as Figures 5-6 In one embodiment, the number of sides 40 is four, and at least one set of oppositely arranged sides 40 is provided with sub-light-emitting units 601.

[0053] In this embodiment, the pixel-defining portion has four side surfaces 40, and sub-light-emitting units 601 are provided on at least one set of oppositely arranged side surfaces 40. This enables multi-directional, large-angle directional light emission parallel to the first direction XX or parallel to the second direction YY. Compared to providing at least one sub-light-emitting unit 601 on three side surfaces 40, this significantly widens the effective light-emitting viewing angle range and simultaneously meets the optical path requirements of multiple lateral observation areas. Furthermore, in practical applications, this embodiment can also be applied to the field of glasses-free 3D display. Specifically, sub-light-emitting units 601 are respectively provided on oppositely arranged side walls. Relying on the inclined side walls, the left-side sub-light-emitting unit 601 projects the left-viewing beam at a large angle to the observing left eye, and the right-side left-side sub-light-emitting unit 601 projects the right-viewing beam at a large angle to the observing right eye, forming binocular parallax convergence, which allows the human eye to perceive three-dimensional stereoscopic imaging with glasses-free fusion.

[0054] Reference Figure 2-3 as well as Figures 5-6 In one optional embodiment, side surface 40 includes a first side surface 401, a second side surface 402, a third side surface 403, and a fourth side surface 404 connected sequentially to each other; sub-light-emitting unit 601 includes a first sub-light-emitting unit 6011 located on the surface of the first side surface 401, a second sub-light-emitting unit 6012 located on the surface of the second side surface 402, a third sub-light-emitting unit 6013 located on the surface of the third side surface 403, and a fourth sub-light-emitting unit 6014 located on the surface of the fourth side surface 404; wherein, the first side surface 401 and the third side surface 403 are arranged opposite each other along a direction parallel to the first direction X, and the second side surface 402 and the fourth side surface 404 are arranged opposite each other along a direction parallel to the second direction Y; the first direction X and the second direction Y intersect and are both parallel to the plane where the substrate 20 is located; In this embodiment, sub-light-emitting units 601 are respectively arranged on the four sides 40 to form four light-emitting surfaces, which can obtain large-angle directional light emission paths in four directions, realize spatial beam projection of multi-path parallax images, and significantly widen the viewing angle. In addition, by controlling these four self-light-emitting units 60 to emit light or turn off, naked-eye 3D display applicable to multiple viewpoints can be realized, which widens the effective viewing area and viewing angle of stereoscopic viewing.

[0055] It should be noted that, Figures 4-6In the design, the angle θ between the plane containing each side 40 of the pixel limiting part and the plane containing the substrate 20 is an acute angle. The angles between the plane containing the first side 401 and the plane containing the substrate 20, the angles between the plane containing the second side 402 and the plane containing the substrate 20, the angles between the plane containing the third side 403 and the plane containing the substrate 20, and the angles between the plane containing the fourth side 404 and the plane containing the substrate 20 can be independently designed according to the actual required light emission angle, allowing for a high degree of adjustment freedom.

[0056] Figure 7 This is a top view schematic diagram of another pixel-limiting section in this application. Figure 8 This is a cross-sectional view of the display panel 10 in some embodiments of this application. Figure 9 This is a cross-sectional view of the display panel 10 in some embodiments of this application.

[0057] Reference Figures 7-9 In one optional embodiment, the pixel defining portion includes a top surface 50 located on the side 40 away from the substrate 20 and parallel to the substrate 20, and the sub-light-emitting unit 601 includes a fifth sub-light-emitting unit 6015 located on the surface of the top surface 50.

[0058] In this embodiment, by setting the pixel limiting part as a three-dimensional trapezoidal structure with a top surface 50, the top apex structure is eliminated. The side wall tilt angle of the three-dimensional trapezoidal structure is easier to adjust finely compared to the side wall of the pyramid structure. The sub-light-emitting unit 601 has a wider large-angle light emission range and a higher degree of adjustment freedom, which can realize multi-angle uniform light distribution. The light emission paths of the sub-light-emitting units 601 on the four side walls are independent and do not interfere with each other, effectively avoiding the problems of excessive light emission angle and excessive light energy concentration caused by the steep tilt angle of the pyramid. In addition, a fifth sub-light-emitting unit 6015 is set on the top surface 50 parallel to the substrate 20, forming five light-emitting surfaces. At the same time, directional light emission at the frontal viewing angle can be achieved.

[0059] It should be noted that a three-dimensional trapezoid, also known as a trapezoidal body, is a closed trapezoidal three-dimensional structure with parallel upper and lower bases, the upper base being smaller than the lower base. Its four sides are sloping and regular side walls, and the top has a flat and closed horizontal top surface of 50°.

[0060] Reference Figures 7-9 In one optional embodiment, the angle between the plane where each side 40 is located and the plane where the substrate 20 is located is greater than or equal to 20° and less than or equal to 80°.

[0061] In this embodiment, by limiting the angle between the side wall 40 and the plane containing the substrate 20 to a range greater than or equal to 20° and less than or equal to 80°, the sidewall light emission angle and light path refraction direction can be precisely constrained according to the actual required viewing angle range, achieving controllable light emission viewing angle. The angle between the side wall 40 and the plane containing the substrate 20 can be 20°, 30°, 40°, 50°, 60°, 70°, or 80°, etc. When the angle between the side wall plane and the plane containing the substrate 20 is smaller, the sidewall light is more inclined to converge in the forward direction, resulting in a smaller viewing angle. When the angle between the side wall plane and the plane containing the substrate 20 is larger, the sidewall light tends to emit light horizontally to the side, resulting in a wider viewing angle and less light leakage from the front.

[0062] Figure 10 This is a cross-sectional view of the display panel 10 in some embodiments of this application.

[0063] Reference Figure 10 In one embodiment, the sub-light-emitting unit 601 includes a first electrode 80, a light-emitting functional layer 90, and a second electrode 100 sequentially stacked along a direction away from the substrate 20.

[0064] In this embodiment, when the first electrode 80 is the anode, the second electrode 100 is the cathode; when the first electrode 80 is the cathode, the second electrode 100 is the anode. The first electrode 80, the second electrode 100, and the light-emitting functional layer 90 constitute a sub-light-emitting unit 601. The light-emitting functional layers 90 of each sub-light-emitting unit 601 located on the same pixel definition section 301 can be interconnected.

[0065] Reference Figure 10 In one optional embodiment, the area of ​​the first electrode 80 is smaller than the area of ​​its side surface 40 or its top surface 50.

[0066] In this embodiment, by limiting the area of ​​the first electrode 80 of the sub-light-emitting unit 601 to be smaller than the area of ​​its side surface 40 or its top surface 50, the edge of the first electrode 80 relative to its side surface 40 or top surface 50 can be recessed, thereby preventing the first electrodes 80 of adjacent sub-light-emitting units 601 located on the same pixel definition section 301 from interfering with each other.

[0067] In one optional embodiment, the first electrode 80 is the anode and the second electrode 100 is the cathode.

[0068] In this embodiment, both the anode and cathode can be transparent electrodes. The anode is made of indium tin oxide or indium zinc oxide, and the cathode is made of magnesium or silver. It should be noted that the shapes of the first electrode 80 and the second electrode 100 are not limited.

[0069] Figure 11This is a cross-sectional view of the display panel 10 in some embodiments of this application.

[0070] Reference Figure 11 In one optional embodiment, the light-emitting functional layer 90 includes a first common layer 901, a light-emitting layer 902, and a second common layer 903, which are sequentially stacked along a direction away from the substrate 20.

[0071] In this embodiment, the first common layer 901 includes a hole injection layer and a hole transport layer, which are sequentially stacked along the direction away from the substrate 20. The second common layer 903 includes an electron transport layer and an electron injection layer, which are sequentially stacked along the direction away from the substrate 20.

[0072] In one embodiment, the light emission colors of each sub-light emission unit 601 located on the same pixel definition section 301 are the same.

[0073] In this embodiment, each sub-light-emitting unit 601 located on the same pixel definition section 301 is set to the same light-emitting color, which can unify the overall light-emitting tone and improve the visual consistency of the light emitted from the top surface 50 and the side surface 40. Figure 12 This is a cross-sectional view of the display panel 10 in some embodiments of this application.

[0074] Reference Figure 12 In one optional embodiment, the light-emitting layers 902 located on the same pixel definition section 301 are interconnected.

[0075] In this embodiment, since each sub-light-emitting unit 601 located on the same pixel definition section 301 is set to the same light-emitting color, and each light-emitting layer 902 located on the same pixel definition section 301 is set to be interconnected, it is beneficial to simplify the process flow.

[0076] In one optional embodiment, the orthographic projection of each light-emitting layer 902 located on the same pixel definition portion 301 onto the substrate 20 overlaps with the orthographic projection of the pixel definition portion 301 onto the substrate 20, and the light-emitting layers 902 on different pixel definition portions 301 are disconnected from each other.

[0077] In this embodiment, the orthographic projection of each light-emitting layer 902 located on the same pixel definition portion 301 onto the substrate 20 is set to cover the orthographic projection of the pixel definition portion 301 onto the substrate 20. This allows the light-emitting layer 902 to completely cover the first electrode 80. Simultaneously, when fabricating the light-emitting layer 902, the opening size of the mask can be set to be the same as or slightly larger than the orthographic projection size of the pixel definition portion 301 onto the substrate 20, thereby enabling the synchronous fabrication of the light-emitting layers 902 on the same pixel definition portion 301. The light-emitting layers 902 on different pixel definition portions 301 are disconnected from each other, preventing crosstalk between sub-light-emitting units 601 on different pixel definition portions 301 due to different emission colors.

[0078] Reference Figures 10-12 In one optional embodiment, the first common layer 901 of each sub-light-emitting unit 601 located on the same pixel definition section 301 is interconnected; and / or, the second common layer 903 of each sub-light-emitting unit 601 located on the same pixel definition section 301 is interconnected.

[0079] In this embodiment, by setting each first common layer 901 located on the same pixel definition section 301 to be interconnected, and each second common layer 903 located on the same pixel definition section 301 to be interconnected, the process flow can be simplified.

[0080] Reference Figures 10-12 In one optional embodiment, the first common layer 901 of each sub-light-emitting unit 601 is interconnected; and / or, the second common layer 903 of each sub-light-emitting unit 601 is interconnected.

[0081] In this embodiment, by setting the first common layer 901 of each sub-light-emitting unit 601 to be interconnected and the second common layer 903 of each sub-light-emitting unit 601 to be interconnected, the entire surface of the first common layer 901 and the second common layer 903 can be fabricated, simplifying the process flow.

[0082] Reference Figures 10-12 In one optional embodiment, the second electrodes 100 of each of the sub-light-emitting units 601 are interconnected.

[0083] In this embodiment, the cathode layer is continuously arranged across the entire surface, forming a common electrode. This effectively simplifies the electrode wiring structure, reduces the interface contact resistance and conduction instability caused by splicing multiple cathode segments, and ensures uniform power supply to each sub-light-emitting unit 601.

[0084] Figure 13 This is a cross-sectional view of the display panel 10 in some embodiments of this application.

[0085] Reference Figure 13In one optional embodiment, the pixel definition section 301 includes a first pixel definition section 3011 and a second pixel definition section 3022; the emission color of the sub-light-emitting unit 601 on the first pixel definition section 3011 is different from the emission color of the sub-light-emitting unit 601 on the second pixel definition section 3022.

[0086] In this embodiment, two different colored sub-light-emitting units 601 are provided in the display panel 10, which can realize dual-color mixing and color adjustment, enriching the color expression capability of the display panel 10.

[0087] Reference Figures 11-12 In an optional embodiment, the pixel definition unit 301 further includes a third pixel definition unit 3033, wherein the emission color of the sub-light-emitting unit 601 on the third pixel definition unit 3033, the emission color of the sub-light-emitting unit 601 on the second pixel definition unit 3022, and the emission color of the sub-light-emitting unit 601 on the first pixel definition unit 3011 are all different. In this embodiment, three different colored sub-light-emitting units 601 are provided in the display panel 10, which can realize three-color mixing and color adjustment, further enriching the color expression capability of the display panel 10.

[0088] In one optional embodiment, the emission color of the sub-light-emitting unit 601 includes any one of red, green, or blue.

[0089] In this embodiment, three different colored sub-light-emitting units 601, namely red, green and blue, are set in the display panel 10. Full-color display can be achieved by independently driving the three primary colors and matching the brightness ratio. It can synthesize any color in a rich color gamut, which significantly improves the color saturation, sense of layering and reproduction of the displayed picture.

[0090] Figure 14 This is a cross-sectional view of the display panel 10 in some embodiments of this application.

[0091] Reference Figure 14 In one embodiment, the display panel 10 further includes a functional structure layer 70, which is located on the side of the light-emitting unit 60 away from the substrate 20. The functional structure layer 70 includes a plurality of functional structure portions 701 that are disposed one-to-one with the top surface 50. The functional structure portions 701 are used to block light or transmit light.

[0092] In this embodiment, by providing functional structural parts 701 for shading or transmitting light one by one above the top surface 50, it is possible to block the light emitted by the fifth sub-light-emitting unit 6015 located on the top surface 50 or to transmit the light emitted by the fifth sub-light-emitting unit 6015 located on the top surface 50, and also to block the forward light emission or to transmit the forward light emission, thereby achieving wide-angle visibility or forward visibility according to actual needs.

[0093] In one optional embodiment, the orthographic projection of the functional structure 701 on the substrate 20 and the orthographic projection of the top surface 50 on the substrate 20 at least partially overlap. In this embodiment, the light emitted by the fifth sub-light-emitting unit 6015 located on the top surface 50 can be blocked or allowed to pass through, and forward light can also be allowed to pass through or be blocked.

[0094] In one optional embodiment, the orthographic projection of the functional structure 701 on the substrate 20 and the orthographic projection of the top surface 50 on the substrate 20 overlap. In this embodiment, if the area of ​​the functional structure portion 701 is too large, it will block the light emitted by the sub-light-emitting unit 601 on the side 40. If the area of ​​the functional structure portion 701 is too small, it will not be able to completely block the forward light emission. The orthographic projection of the functional structure portion 701 on the substrate 20 and the orthographic projection of the top surface 50 on the substrate 20 overlap, which can achieve independent and precise light blocking or light transmission.

[0095] As an optional embodiment, the material of the functional structure 701 includes any one of light-shielding material, liquid crystal material, and electrochromic material.

[0096] In this embodiment, the functional structure 701 can be configured as an opaque light-blocking material to effectively block direct light. Alternatively, the functional structure 701 can be configured as a liquid crystal material or an electrochromic material that can block or transmit light according to actual needs, allowing for flexible adjustment of the transmission or blocking of direct light.

[0097] In one embodiment, the display panel 10 further includes a plurality of thin-film transistors 110 that correspond one-to-one with and are electrically connected to the corresponding sub-light-emitting units 601.

[0098] In this embodiment, each sub-light-emitting unit 601 is individually electrically connected via a corresponding thin-film transistor 110, enabling independent control over the opening and closing of each sub-light-emitting unit 601. This allows for shared modes, wide viewing angles, or glasses-free 3D modes in different specific situations. Furthermore, each thin-film transistor 110 can finely and independently control the luminous intensity and timing of each electrically connected sub-light-emitting unit 601, providing a precise pixel-level driving foundation for glasses-free 3D displays. This facilitates accurate separation of left and right eye parallax images, effectively reducing crosstalk, ghosting, and blurring, and improving the stereoscopic effect and viewing comfort of 3D images. (Refer to...) Figure 15It should be noted that the sub-light-emitting unit 601 can be electrically connected to the thin-film transistor 110 by fabricating a via 140 on the pixel definition portion 301 and filling the via 140 with conductive material or fabricating a wire. The thin-film transistor 110 is located in the array layer 150, which is located between the substrate 20 and the pixel definition layer 30.

[0099] Reference Figure 14 In one optional embodiment, the display panel 10 includes an encapsulation layer 120 located between the light-emitting unit 60 and the functional structure layer 70.

[0100] In this embodiment, an encapsulation layer 120 is provided on the side of the light-emitting unit 60 away from the substrate 20, which can effectively isolate external moisture and oxygen from entering, effectively inhibit the oxidative degradation of the organic light-emitting layer 902, and significantly improve the service life and reliability of the display panel 10.

[0101] In one optional embodiment, the encapsulation layer 120 includes a first film layer, a second film layer, and a third film layer sequentially stacked along a direction away from the substrate 20; In this embodiment, by setting three encapsulation layers 120, the encapsulation effect is effectively improved, and the service life and reliability of the display panel 10 are increased.

[0102] In one optional embodiment, the materials of the first and third membrane layers are inorganic materials; and / or, the material of the second membrane layer is an organic material.

[0103] In this embodiment, inorganic materials possess excellent barrier properties against moisture and oxygen intrusion, while organic materials utilize their self-leveling properties to smooth the film surface and effectively release film stress. Therefore, the sandwich-structured encapsulation of inorganic, organic, and inorganic materials forms multiple barrier layers, significantly extending the lifespan of the display panel 10.

[0104] In one optional embodiment, the display panel 10 includes an optical adhesive layer 130 located on the side of the functional structure layer 70 away from the substrate 20.

[0105] In this embodiment, the optical adhesive layer 130 fills the step gap between the functional structure 701 and the underlying film layer, making the surface smoother and avoiding light refraction, scattering, and local dark lines caused by uneven steps, thereby improving light emission uniformity and wide-angle light emission effect. In addition, the optical adhesive layer 130 can buffer stress and protect the pattern of the functional structure 701, enhancing the overall structure and reliability.

[0106] Reference Figures 4-15 The second aspect of this application provides a control method for a display panel 10, which is applied to the display panel 10 in any of the above embodiments.

[0107] In one embodiment, a control method for a display panel 10 includes: controlling at least one sub-light-emitting unit 601 corresponding to a side 40 to emit light; or, the sub-light-emitting unit 601 includes a fifth sub-light-emitting unit 6015 located on the surface of the top surface 50, controlling the sub-light-emitting units 601 corresponding to each side 40 to turn off, and controlling the fifth sub-light-emitting unit 6015 to emit light.

[0108] In this embodiment, by controlling the light emission of at least one sub-light-emitting unit 601 corresponding to one side 40, the display panel 10 can maintain sufficient brightness and uniform light emission within a wide viewing angle range. Alternatively, by controlling the sub-light-emitting units 601 corresponding to each side 40 to be turned off, and controlling the fifth sub-light-emitting unit 6015 located on the surface of the top surface 50 to emit light, a visible effect in the frontal viewing direction can be achieved.

[0109] In one embodiment, the material of the functional structure 701 includes a light-shielding material; the control method for controlling the light emission of at least one sub-light-emitting unit 601 corresponding to one side 40 includes: controlling the first sub-light-emitting unit 6011 and the third sub-light-emitting unit 6013 to emit light and the second sub-light-emitting unit 6012 and the fourth sub-light-emitting unit 6014 to turn off by controlling the thin-film transistor 110; or, the material of the functional structure 701 includes a light-shielding material, and the control method for controlling the light emission of at least one sub-light-emitting unit 601 corresponding to one side 40 includes: controlling the second sub-light-emitting unit 6012 and the fourth sub-light-emitting unit 6014 to emit light and the first sub-light-emitting unit 6011 and the third sub-light-emitting unit 6013 to turn off by controlling the thin-film transistor 110.

[0110] In this embodiment, each sub-light-emitting unit 601 is controlled by an independent thin-film transistor 110 to emit light or turn off. Through the control of the thin-film transistor 110, the first sub-light-emitting unit 6011 and the third sub-light-emitting unit 6013, which are positioned opposite each other in the first direction X, emit light independently, while the second sub-light-emitting unit 6012 and the fourth sub-light-emitting unit 6014, which are positioned opposite each other in the second direction Y, are turned off. By simultaneously cooperating with the functional structure 701 containing light-shielding material in the forward-looking direction, the light emitted by different sub-light-emitting units 601 can be coupled to their respective viewing areas, forming separate left-eye parallax images and right-eye parallax images, thereby achieving naked-eye 3D display in the first direction X without the need for auxiliary devices. Alternatively, through the control of the thin-film transistor 110, the second sub-light-emitting unit 6012 and the fourth sub-light-emitting unit 6014, which are positioned opposite each other in the second direction Y, emit light independently, while the first sub-light-emitting unit 6011 and the third sub-light-emitting unit 6013, which are positioned opposite each other in the first direction X, are turned off. By simultaneously cooperating with the functional structure 701 containing light-shielding material in the forward-looking direction, the light emitted by different sub-light-emitting units 601 can be coupled to the corresponding viewing areas, forming mutually separated left-eye parallax images and right-eye parallax images. This enables naked-eye 3D display in the second direction Y without the need for auxiliary devices. Furthermore, the functional structure 701 containing light-shielding material can suppress crosstalk and aliasing of light from adjacent viewing areas, effectively reducing ghosting, blurring, and other phenomena, and improving the stereoscopic effect, clarity, and viewing comfort of naked-eye 3D display.

[0111] In one optional embodiment, the control method for controlling the first sub-light-emitting unit 6011 and the third sub-light-emitting unit 6013 to emit light and the second sub-light-emitting unit 6012 and the fourth sub-light-emitting unit 6014 to turn off by controlling the thin-film transistor 110 includes: the sub-light-emitting unit 601 includes a fifth sub-light-emitting unit 6015 located on the surface of the top surface 50; the fifth sub-light-emitting unit 6015 is turned off by controlling the thin-film transistor 110.

[0112] In this embodiment, the first sub-light-emitting unit 6011 and the third sub-light-emitting unit 6013, which are positioned opposite each other in the first direction X, are controlled to emit light, while the fifth sub-light-emitting unit 6015 on the top surface 50 is turned off. This, combined with the functional structure 701 containing light-shielding material positioned in the frontal viewing direction, enables glasses-free 3D display in the first direction X. Compared to a scheme that keeps the fifth sub-light-emitting unit 6015 on the top surface 50 lit, this significantly reduces the direct light component in the frontal viewing direction, preventing direct crosstalk and aliasing interference from the light emitted from the top surface 50 to the left and right eye parallax light paths. This effectively reduces ghosting, blurring, and parallax color mixing issues in glasses-free 3D display, improving the purity and clarity of stereoscopic imaging. Simultaneously, turning off the fifth sub-light-emitting unit 6015 on the top surface 50 allows more light to be emitted laterally, further enhancing the spatial separation of the left and right eye parallax images and optimizing the stereoscopic viewing effect at wide viewing angles. In addition, the control method of the display panel 10 can reduce the light energy loss caused by ineffective direct-view light, improve the 3D display quality while reducing power consumption, avoid visual discomfort caused to the human eye by direct-view strong light, and balance display effect and viewing comfort.

[0113] In one optional embodiment, the control method for controlling the second sub-light-emitting unit 6012 and the fourth sub-light-emitting unit 6014 to emit light and the first sub-light-emitting unit 6011 and the third sub-light-emitting unit 6013 to turn off by controlling the thin-film transistor 110 includes: the sub-light-emitting unit 601 includes a fifth sub-light-emitting unit 6015 located on the surface of the top surface 50; the fifth sub-light-emitting unit 6015 is turned off by controlling the thin-film transistor 110.

[0114] In this embodiment, the second sub-light-emitting unit 6012 and the fourth sub-light-emitting unit 6014, which are positioned opposite each other in the second direction Y, are controlled to emit light, while the fifth sub-light-emitting unit 6015 on the top surface 50 is turned off. This, combined with the functional structure 701 containing light-shielding material positioned in the frontal viewing direction, enables glasses-free 3D display in the second direction Y. Compared to a scheme that keeps the fifth sub-light-emitting unit 6015 on the top surface 50 lit, this significantly reduces the direct light component in the frontal viewing direction, preventing direct crosstalk and aliasing interference from the light emitted from the top surface 50 to the left and right eye parallax light paths. This effectively reduces ghosting, blurring, and parallax color mixing issues in glasses-free 3D display, improving the purity and clarity of stereoscopic imaging. Simultaneously, turning off the fifth sub-light-emitting unit 6015 on the top surface 50 allows more light to be emitted laterally, further enhancing the spatial separation of the left and right eye parallax images and optimizing the stereoscopic viewing effect at wide viewing angles. In addition, the control method of the display panel 10 can reduce the light energy loss caused by ineffective direct-view light, improve the 3D display quality while reducing power consumption, avoid visual discomfort caused to the human eye by direct-view strong light, and balance display effect and viewing comfort.

[0115] In one embodiment, the sub-light-emitting unit 601 includes a fifth sub-light-emitting unit 6015 located on the surface of the top surface 50. The control method for controlling the light emission of at least one sub-light-emitting unit 601 corresponding to the side surface 40 includes: controlling the first sub-light-emitting unit 6011, the second sub-light-emitting unit 6012, the third sub-light-emitting unit 6013, the fourth sub-light-emitting unit 6014, and the fifth sub-light-emitting unit 6015 to emit light via a thin-film transistor 110; or, the sub-light-emitting unit 601 includes a fifth sub-light-emitting unit 6015 located on the surface of the top surface 50, and the material of the functional structure 701 includes a liquid crystal material or the electrochromic material; the control method for controlling the light emission of at least one sub-light-emitting unit 601 corresponding to the side surface 40 includes: controlling the first sub-light-emitting unit 6011, the second sub-light-emitting unit 6012, the third sub-light-emitting unit 6013, the fourth sub-light-emitting unit 6014, and the fifth sub-light-emitting unit 6015 to emit light via a thin-film transistor 110; and controlling the functional structure 701 to be in a light-transmitting state.

[0116] In this embodiment, by controlling the emission of light from each sub-light-emitting unit 601 located on the top surface 50 and each side surface 40, multi-directional and wide-angle light emission can be achieved, significantly widening the viewing angle range of the display panel 10. Sufficient brightness output can be obtained in both frontal and side viewing angles. Furthermore, a functional structure 701 containing liquid crystal material or electrochromic material is provided above the fifth sub-light-emitting unit 6015 and controlled to be in a light-transmitting state. Compared to solutions without this structure, the light intensity of the fifth sub-light-emitting unit 6015 on the top surface 50 can be actively controlled, achieving precise control over the light component in the frontal viewing direction. Simultaneously, the light transmission or light blocking of the functional structure 701 can be switched electronically, allowing flexible switching between naked-eye 3D mode and conventional display mode, broadening the application scenarios of the panel.

[0117] In one optional embodiment, the material of the functional structure 701 includes liquid crystal material or the electrochromic material; the control method for controlling the sub-light-emitting units 601 corresponding to each side 40 to turn off and the fifth sub-light-emitting unit 6015 to emit light includes: controlling the first sub-light-emitting unit 6011, the second sub-light-emitting unit 6012, the third sub-light-emitting unit 6013 and the fourth sub-light-emitting unit 6014 to turn off and the fifth sub-light-emitting unit 6015 to emit light through the thin-film transistor 110; and controlling the functional structure 701 to be in a light-transmitting state.

[0118] In this embodiment, each of the sub-light-emitting units 601 located on the side 40 is turned off, and only the fifth sub-light-emitting unit 6015 located on the top surface 50 emits light. The liquid crystal or electrochromic material above is controlled to be in a light-transmitting state, which enables light to be emitted from the front view direction and facilitates switching the light transmittance of the functional structure 701 according to the scene, taking into account both the display clarity and the flexibility of use of the display panel 10.

[0119] In one optional embodiment, the material of the functional structure 701 includes a liquid crystal material or an electrochromic material; the control method for controlling the light emission of at least one sub-light-emitting unit 601 corresponding to one side 40 includes: controlling the first sub-light-emitting unit 6011 and / or the third sub-light-emitting unit 6013 to emit light, and turning off the second sub-light-emitting unit 6012 and the fourth sub-light-emitting unit 6014, thereby controlling the functional structure 701 to be in a light-shielding state; or, the material of the functional structure 701 includes a liquid crystal material or an electrochromic material; the control method for controlling the light emission of at least one sub-light-emitting unit 601 corresponding to one side 40 includes: controlling the second sub-light-emitting unit 6012 and / or the fourth sub-light-emitting unit 6014 to emit light, and turning off the first sub-light-emitting unit 6011 and the third sub-light-emitting unit 6013, thereby controlling the functional structure 701 to be in a light-shielding state.

[0120] In this embodiment, by illuminating either the first sub-light-emitting unit 6011 or the third sub-light-emitting unit 6013, and turning off the second sub-light-emitting unit 6012 and the fourth sub-light-emitting unit 6014, a wide viewing angle can be achieved in the first direction X. By illuminating both the first and third sub-light-emitting units 6011 and 6013 simultaneously, and turning off the second and fourth sub-light-emitting units 6012 and 6014, naked-eye 3D display can be achieved in the first direction X. By illuminating either the second sub-light-emitting unit 6012 or the fourth sub-light-emitting unit 6014, and turning off the first and third sub-light-emitting units 6011 and 6013, a wide viewing angle can be achieved in the second direction Y. By illuminating both the second and fourth sub-light-emitting units 6012 and 6014 simultaneously, and turning off the first and third sub-light-emitting units 6011 and 6013, naked-eye 3D display can be achieved in the second direction Y. By controlling at least one of the two sub-light-emitting units 601 located on the side 40 and arranged opposite each other to light up, and adjusting the functional structure 701 of the top surface 50 containing liquid crystal material or electrochromic material to a light-blocking state, it is possible to effectively block the light-emitting path in the frontal direction and avoid crosstalk between the direct light from the top surface 50 and the lateral parallax light path.

[0121] Reference Figure 16 In a third aspect, this application provides a display device 200, which includes the aforementioned display panel 10, or the display panel 10 under the aforementioned control method.

[0122] The display device 200 can be a mobile or fixed terminal with a display panel 10, such as a mobile phone, television, tablet computer, laptop computer, Ultra-Mobile Personal Computer (UMPC), Personal Digital Assistant (PDA), navigation device, smartwatch, or virtual reality device. Furthermore, the display device 200 provided in this application can achieve naked-eye 3D display, wide-viewing-angle display, or front-viewing-direction display by adjusting the sub-light-emitting units 601 located on each side 40 and the sub-light-emitting unit 601 located on the top surface 50, in conjunction with the functional structure part 701, to present a light-blocking or light-transmitting state. Among these, naked-eye 3D display is suitable for immersive stereoscopic viewing scenarios, such as watching stereoscopic videos, 3D games, stereoscopic images, and stereoscopic advertising displays without wearing 3D glasses. Wide-viewing-angle display is suitable for public displays or scenarios with multiple viewers. The display device 200 provided in this application has the characteristics of strong scenario compatibility and wide applicability.

[0123] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0124] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A display panel, characterized in that, include: Substrate; A pixel definition layer is located on one side of the substrate, and the pixel definition layer includes a pixel definition portion, the pixel definition portion including a plurality of interconnected side surfaces; A light-emitting unit, the light-emitting unit comprising a plurality of sub-light-emitting units, the sub-light-emitting units being located on at least one of the side surfaces; The angle between the plane containing each side and the plane containing the substrate is an acute angle.

2. The display panel according to claim 1, characterized in that, The number of the sides is four, and at least one set of the oppositely arranged sides is provided with the sub-light-emitting unit; Preferably, the side surface includes a first side surface, a second side surface, a third side surface, and a fourth side surface that are connected to each other in sequence; the sub-light-emitting unit includes a first sub-light-emitting unit located on the surface of the first side surface, a second sub-light-emitting unit located on the surface of the second side surface, a third sub-light-emitting unit located on the surface of the third side surface, and a fourth sub-light-emitting unit located on the surface of the fourth side surface; Wherein, the first side and the third side are disposed opposite each other along a direction parallel to the first direction, and the second side and the fourth side are disposed opposite each other along a direction parallel to the second direction; the first direction and the second direction intersect and are both parallel to the plane in which the substrate is located; Preferably, the pixel defining portion includes a top surface located on the side away from the substrate and parallel to the substrate, and the sub-light-emitting unit includes a fifth sub-light-emitting unit located on the surface of the top surface; Preferably, the angle between the plane containing each of the side surfaces and the plane containing the substrate is greater than or equal to 20° and less than or equal to 80°; Preferably, the angle between each of the side surfaces and the plane containing the substrate is the same.

3. The display panel according to claim 2, characterized in that, The sub-light-emitting unit includes a first electrode, a light-emitting functional layer, and a second electrode, which are sequentially stacked along a direction away from the substrate. Preferably, the area of ​​the first electrode is smaller than the area of ​​the side surface on which it is located or the top surface on which it is located. Preferably, the first electrode is the anode and the second electrode is the cathode; Preferably, the light-emitting functional layer includes a first common layer, a light-emitting layer, and a second common layer sequentially stacked along a direction away from the substrate; Preferably, the light emission colors of each of the sub-light-emitting units located on the same pixel definition section are the same; Preferably, the light-emitting layers located on the same pixel definition section are interconnected; Preferably, the first common layer of each of the sub-light-emitting units located on the same pixel definition portion is interconnected; and / or, the second common layer of each of the sub-light-emitting units located on the same pixel definition portion is interconnected; Preferably, the first common layer of each of the sub-light-emitting units is interconnected; and / or, the second common layer of each of the sub-light-emitting units is interconnected; Preferably, the second electrodes of each of the sub-light-emitting units are interconnected; Preferably, the pixel definition section includes a first pixel definition section and a second pixel definition section; the emission color of the sub-light-emitting unit on the first pixel definition section is different from the emission color of the sub-light-emitting unit on the second pixel definition section; Preferably, the pixel definition section further includes a third pixel definition section, wherein the emission color of the sub-light-emitting unit on the third pixel definition section, the emission color of the sub-light-emitting unit on the second pixel definition section, and the emission color of the sub-light-emitting unit on the first pixel definition section are all different; Preferably, the emission color of the sub-light-emitting unit includes any one of red, green, or blue.

4. The display panel according to claim 3, characterized in that, The display panel further includes a functional structure layer, which is located on the side of the light-emitting unit away from the substrate; the functional structure layer includes a plurality of functional structure parts that are disposed one-to-one with the top surface; The functional structural part is used to block light or allow light to pass through; Preferably, the orthographic projection of the functional structure portion on the substrate and the orthographic projection of the top surface on the substrate at least partially overlap; Preferably, the orthographic projection of the functional structure portion onto the substrate and the orthographic projection of the top surface onto the substrate overlap; Preferably, the material of the functional structure includes any one of light-shielding materials, liquid crystal materials, and electrochromic materials.

5. The display panel according to any one of claims 1 to 4, characterized in that, The display panel also includes a plurality of thin-film transistors that correspond one-to-one with the sub-light-emitting units and are electrically connected to the corresponding sub-light-emitting units; Preferably, the display panel includes an encapsulation layer located between the light-emitting unit and the functional structure layer; Preferably, the encapsulation layer includes a first film layer, a second film layer, and a third film layer sequentially stacked along a direction away from the substrate; Preferably, the first and third membrane layers are made of inorganic materials; and / or, the second membrane layer is made of organic materials. Preferably, the display panel includes an optical adhesive layer located on the side of the functional structure layer away from the substrate.

6. A method for controlling a display panel, characterized in that, The display panel applied to any one of claims 1 to 5 comprises: Control at least one of the sub-light-emitting units corresponding to the side surface to emit light; or, the sub-light-emitting unit includes a fifth sub-light-emitting unit located on the surface of the top surface, control the sub-light-emitting units corresponding to each of the side surfaces to turn off, and control the fifth sub-light-emitting unit to emit light.

7. The control method according to claim 6, characterized in that, The material of the functional structure includes a light-shielding material, and the control method for controlling the light emission of at least one of the sub-light-emitting units corresponding to the side surface includes: controlling the first sub-light-emitting unit and the third sub-light-emitting unit to emit light and the second sub-light-emitting unit and the fourth sub-light-emitting unit to turn off by controlling the thin-film transistor; or, The material of the functional structure includes a light-shielding material, and the control method for controlling the light emission of at least one of the sub-light-emitting units corresponding to the side surface includes: controlling the second sub-light-emitting unit and the fourth sub-light-emitting unit to emit light and the first sub-light-emitting unit and the third sub-light-emitting unit to turn off by controlling the thin-film transistor; Preferably, the control method for controlling the first and third sub-light-emitting units to emit light and the second and fourth sub-light-emitting units to turn off by controlling the thin-film transistor includes: the sub-light-emitting unit includes a fifth sub-light-emitting unit located on the surface of the top surface; and the fifth sub-light-emitting unit is turned off by controlling the thin-film transistor. Preferably, the control method for controlling the second and fourth sub-light-emitting units to emit light and the first and third sub-light-emitting units to turn off by controlling the thin-film transistor includes: the sub-light-emitting unit includes a fifth sub-light-emitting unit located on the surface of the top surface; and the fifth sub-light-emitting unit is turned off by controlling the thin-film transistor.

8. The control method according to claim 6, characterized in that, The sub-light-emitting unit includes a fifth sub-light-emitting unit located on the surface of the top surface, and the control method for controlling the light emission of at least one sub-light-emitting unit corresponding to the side surface includes: controlling the first sub-light-emitting unit, the second sub-light-emitting unit, the third sub-light-emitting unit, the fourth sub-light-emitting unit, and the fifth sub-light-emitting unit to emit light through the thin-film transistor; or, The sub-light-emitting unit includes a fifth sub-light-emitting unit located on the surface of the top surface; the material of the functional structure includes the liquid crystal material or the electrochromic material; the control method for controlling the light emission of at least one sub-light-emitting unit corresponding to the side surface includes: controlling the first sub-light-emitting unit, the second sub-light-emitting unit, the third sub-light-emitting unit, the fourth sub-light-emitting unit, and the fifth sub-light-emitting unit to emit light through the thin-film transistor; controlling the functional structure to be in a light-transmitting state; Preferably, the material of the functional structure includes the liquid crystal material or the electrochromic material; the control method for controlling the sub-light-emitting units corresponding to each of the sides to turn off and controlling the fifth sub-light-emitting unit to emit light includes: controlling the first sub-light-emitting unit, the second sub-light-emitting unit, the third sub-light-emitting unit, and the fourth sub-light-emitting unit to turn off and the fifth sub-light-emitting unit to emit light through the thin-film transistor; controlling the functional structure to be in a light-transmitting state.

9. The control method according to claim 6, characterized in that, The material of the functional structure includes the liquid crystal material or the electrochromic material; the control method for controlling the light emission of at least one of the sub-light-emitting units corresponding to the side surface includes: controlling the first sub-light-emitting unit and / or the third sub-light-emitting unit to emit light through the thin-film transistor, and turning off the second sub-light-emitting unit and the fourth sub-light-emitting unit, thereby controlling the functional structure to be in a light-shielding state; or, The material of the functional structure includes the liquid crystal material or the electrochromic material; the control method for controlling the light emission of at least one of the sub-light-emitting units corresponding to the side surface includes: controlling the second sub-light-emitting unit and / or the fourth sub-light-emitting unit to emit light through the thin-film transistor, turning off the first sub-light-emitting unit and the third sub-light-emitting unit, and controlling the functional structure to be in a light-shielding state.

10. A display device, characterized in that, It includes the display panel described in any one of claims 1 to 5, or the display panel described in any one of claims 6 to 9 under the control method.

Images