Display panel and display device

Abstract

The invention discloses a display panel and a display device. The display panel comprises a silicon-based substrate, a driving circuit layer, a light-emitting device layer and an insulating layer. The driving circuit layer is arranged on the silicon-based substrate. The light-emitting device layer is located on the side, away from the silicon-based substrate, of the driving circuit layer. The light-emitting device comprises a first electrode, a reflection electrode, a transparent electrode, a light-emitting layer and a second electrode which are sequentially arranged in a stacked mode. The first electrode is electrically connected with the driving circuit; in the direction perpendicular to the plane where the silicon-based substrate is located, the first electrode comprises a conductive part which is not overlapped with the reflecting electrode; the transparent electrode is in contact with the conductive portion. And an insulating layer. The substrate is located between the driving circuit layer and the light-emitting device layer; the insulating layer comprises a plurality of grooves corresponding to the light emitting devices; parts of the first electrode and the reflecting electrode are positioned in the groove and extend along the side wall of the groove; in the direction perpendicular to the plane where the silicon-based substrate is located, the conductive parts are not overlapped with the grooves; wherein the oxidation resistance of the first electrode is greater than that of the reflection electrode.

Description

Technical Field

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

[0002] Organic Light Emitting Diode (OLED) display panel has the characteristics of full solid state, self-luminescence, high contrast, wide viewing angle, etc. It is the next generation of flat panel display panel after liquid crystal display panel.

[0003] At present, a self-luminous display panel may include multiple light-emitting devices, which may include a reflective electrode, an anode, a light-emitting layer and a cathode stacked in sequence. By applying a certain electrical signal to the anode and the cathode, the photons in the light-emitting layer can be excited, so that the light-emitting device can display light; at the same time, the light beam emitted by the light-emitting device and propagating downward can be reflected by the reflective electrode to the light-emitting side, thereby improving the light-emitting efficiency. However, in the light beam emitted by the light-emitting element and propagating downward, the light with a larger incident angle with the reflective electrode will propagate to the area where the adjacent light-emitting device is located, resulting in color mixing. In addition, the light is totally reflected inside the display panel and guided laterally, resulting in light loss. Summary of the invention

[0004] The present invention provides a display panel and a display device, which can improve the reliability of a light-emitting device in receiving an electrical signal and the light-emitting efficiency of the light-emitting device, thereby improving the display effect of the display panel.

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

[0006] Silicon-based substrate;

[0007] A driving circuit layer is disposed on the silicon-based substrate; the driving circuit layer includes a plurality of driving circuits arranged in an array;

[0008] A light-emitting device layer is located on a side of the driving circuit layer away from the silicon-based substrate; the light-emitting device layer includes a plurality of light-emitting devices, and the light-emitting devices include a first electrode, a reflective electrode, a transparent electrode, a light-emitting layer, and a second electrode stacked in sequence; the first electrode is electrically connected to the driving circuit; along a direction perpendicular to the plane where the silicon-based substrate is located, the first electrode includes a conductive portion that does not overlap with the reflective electrode; the transparent electrode is in contact with the conductive portion;

[0009] An insulating layer, located between the driving circuit layer and the light emitting device layer; the insulating layer comprises a plurality of grooves arranged corresponding to the light emitting devices;

[0010] Parts of the first electrode and the reflective electrode are located in the groove and extend along the sidewalls of the groove; along a direction perpendicular to the plane where the silicon-based substrate is located, the conductive portion does not overlap with the groove;

[0011] The first electrode has a higher oxidation resistance than the reflective electrode.

[0012] Optionally, the display panel further includes:

[0013] A microlens array is located on a side of the light-emitting device layer away from the silicon-based substrate; the microlens array includes a plurality of microlenses corresponding to the plurality of light-emitting devices; in the thickness direction of the display panel, the corresponding microlenses overlap with the light-emitting devices.

[0014] Optionally, the insulating layer includes at least one sub-insulating layer; the groove includes at least one groove portion corresponding to the at least one sub-insulating layer; the angle between the sidewall of the groove portion and the plane where the silicon-based substrate is located, the angle away from the groove portion is a first angle α,

[0015] Among them, 8°≤α≤45°.

[0016] Optionally, when the groove includes a plurality of groove portions, in the light emitting direction of the display panel, an angle of the first angle α located in each of the groove portions gradually increases.

[0017] Optionally, the material of the first electrode includes at least one of titanium, tantalum, titanium nitride and tantalum nitride;

[0018] The material of the reflective electrode includes aluminum.

[0019] Optionally, the display panel further includes:

[0020] A transparent medium is located in the groove and on a side of the reflective electrode facing away from the silicon-based substrate.

[0021] Optionally, the first electrode includes a flat portion and an inclined portion surrounding the flat portion; the inclined portion extends along a side wall of the groove;

[0022] The flattening portion is electrically connected to the driving circuit.

[0023] Optionally, in the thickness direction of the display panel, the flattened portion does not overlap with the driving circuit.

[0024] Optionally, in the thickness direction of the display panel, the flattened portion overlaps with the driving circuit.

[0025] Optionally, the flattened portion is electrically connected to the driving circuit via a conductive through hole, and the flattened portion covers the conductive through hole.

[0026] Optionally, the display panel further includes:

[0027] The planarization layer is located between the driving circuit layer and the insulating layer; the planarization layer includes a plurality of the conductive through holes.

[0028] Optionally, the display panel further includes:

[0029] The color resist layer is located on the side of the light emitting device layer away from the silicon-based substrate; the color resist layer includes a plurality of color resist structures arranged corresponding to the plurality of light emitting devices; in the thickness direction of the display panel, the corresponding color resist structures overlap with the light emitting devices.

[0030] Optionally, the display panel further includes:

[0031] The encapsulation layer is located on a side of the light-emitting device layer away from the silicon-based substrate.

[0032] In a second aspect, the present invention provides a display device, comprising the display panel described in the first aspect.

[0033] The technical solution provided by the present invention is to set a plurality of grooves corresponding to each light-emitting device in the insulating layer of the display panel, and parts of the first electrode and the reflective electrode in the light-emitting device are located in the grooves and extend along the side walls of the grooves, so that the reflective electrode located in the grooves includes a concave shape. When the light-emitting device emits a light beam, the light beam transmitted to the reflective electrode can be focused and reflected by the reflective electrode to the light-emitting side of the light-emitting device, thereby increasing the light output of the light-emitting device and reducing light loss. At the same time, a first electrode is set between the reflective electrode and the driving circuit layer, and the oxidation resistance of the first electrode is greater than that of the reflective electrode, so that the reliability of the first electrode in transmitting the electrical signal is greater than that of the reflective electrode in transmitting the electrical signal. By contacting the transparent electrode with the conductive part of the first electrode, the driving signal provided by the driving circuit can be accurately transmitted to the transparent electrode through the first electrode, thereby improving the reliability of the light-emitting device in receiving the driving signal, thereby ensuring the light brightness of the light-emitting device and improving the display effect of the display panel. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 A schematic diagram of the structure of a display panel in the related art;

[0035] Figure 2 A schematic diagram of the structure of a display panel provided by an embodiment of the present invention;

[0036] Figure 3 A schematic diagram of the structure of another display panel provided by an embodiment of the present invention;

[0037] Figure 4 A schematic diagram of the structure of another display panel provided by an embodiment of the present invention;

[0038] Figure 5 A schematic diagram of the structure of another display panel provided by an embodiment of the present invention;

[0039] Figure 6 A schematic diagram of the structure of a display panel provided by an embodiment of the present invention;

[0040] Figure 7 A schematic diagram of the structure of another display panel provided by an embodiment of the present invention;

[0041] Figure 8 A schematic diagram of the structure of another display panel provided by an embodiment of the present invention;

[0042] Fig. 9 A schematic diagram of the structure of another display panel provided by an embodiment of the present invention;

[0043] Fig.10 A schematic diagram of the structure of a display panel provided by an embodiment of the present invention;

[0044] Fig.11 A schematic diagram of the structure of another display panel provided by an embodiment of the present invention;

[0045] Fig.12 It is a structural schematic diagram of a display device provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0046] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0047] Figure 1 is a schematic diagram of the structure of a display panel of the related art, such as Figure 1As shown, the display panel 001 includes a silicon-based substrate 010, a driving circuit layer 020 located on one side of the silicon-based substrate 010, and a plurality of light-emitting devices 030 located on one side of the driving circuit layer 020. The light-emitting device 030 includes a reflective electrode 031, a first electrode 032, a light-emitting layer 033, and a second electrode 034, which are sequentially arranged on the side of the reflective electrode 031 away from the silicon-based substrate 010. By arranging the reflective electrode 031 between the first electrode 032 and the driving circuit layer 020, when the light-emitting device 030 emits a light beam, the light beam propagating toward the side of the reflective electrode 031 can be reflected by the reflective electrode 031 to the light-emitting side, thereby improving the light-emitting efficiency. However, since the reflective electrode 031 is arranged in parallel with the first electrode 032 in the related art, the light beam having a large incident angle with the reflective electrode 031 will be reflected by the reflective electrode 031 to the area where the adjacent light-emitting device 030 is located, resulting in color mixing, and the light is totally reflected and laterally guided inside the display panel, which also causes light loss. In addition, in the related art, the reflective electrode 031 is electrically connected to the driving circuit 021 in the driving circuit layer 020, and the driving signal is transmitted to the first electrode 032 through the reflective electrode 031. However, an oxidation reaction may occur in the reflective electrode 031 during the preparation process, and a passivation layer is formed on the surface of the reflective electrode 031, which affects the electrical conductivity of the reflective electrode 031, thereby causing the reliability of the driving signal transmitted to the first electrode 032 to be low, affecting the display effect of the display panel 001.

[0048] To solve the above problems, an embodiment of the present invention provides a display panel. Figure 2 A schematic diagram of the structure of a display panel provided by an embodiment of the present invention is shown in FIG. Figure 2 As shown, the display panel 100 includes a silicon-based substrate 10, a driving circuit layer 20, a light-emitting device layer 30 and an insulating layer 40. The driving circuit layer 20 is disposed on the silicon-based substrate 10, and the driving circuit layer 20 includes a plurality of driving circuits 21 arranged in an array. The light-emitting device layer 30 is located on the side of the driving circuit layer 20 away from the silicon-based substrate 10, and the light-emitting device layer 30 includes a plurality of light-emitting devices 03, and the light-emitting device 03 includes a first electrode 31, a reflective electrode 32, a transparent electrode 33, a light-emitting layer 34 and a second electrode 35 which are stacked in sequence. The first electrode 31 is electrically connected to the driving circuit 21; along a direction perpendicular to the plane where the silicon-based substrate 10 is located, the first electrode 31 includes a conductive portion 310 that does not overlap with the reflective electrode 32, and the transparent electrode 33 is in contact with the conductive portion 310. The insulating layer 40 is located between the driving circuit layer 20 and the light-emitting device layer 30. The insulating layer 40 includes a plurality of grooves 04 corresponding to the light emitting devices 03. Parts of the first electrode 31 and the reflective electrode 32 are located in the grooves 04 and extend along the sidewalls of the grooves 04. In the direction Z perpendicular to the plane of the silicon substrate 10, the conductive portion 310 does not overlap with the grooves 04.

[0049] Among them, the oxidation resistance of the first electrode 31 is greater than that of the reflective electrode 32. Oxidation resistance refers to the ability of a substance to resist oxidation. The stronger the oxidation resistance, the less likely it is that an oxide layer will form on the surface of the material. Since the oxide layer has strong insulation, the conductivity of the electrode layer with an oxide layer formed on the surface is relatively low. Therefore, the conductivity of the first electrode 31 is greater than that of the reflective electrode 32.

[0050] Each driving circuit 21 in the driving circuit layer 20 is electrically connected to the first electrode 31 in each light-emitting device 03, so as to provide a driving signal to the first electrode 31 of the light-emitting device 03, and drive the light-emitting device 03 to display light. The driving circuit 21 in the driving circuit layer 20 can control the color and brightness of the light emitted by the light-emitting device 03 by controlling the driving signal provided to the light-emitting device 03. Among them, the driving signal provided by the driving circuit 21 to the first electrode 31 can be a voltage signal or a current signal. The driving circuit 21 can include active devices and / or passive devices, and the active devices include transistors, etc., and the passive devices include resistors, capacitors, inductors, etc. Under the premise that the driving circuit 21 can drive the light-emitting device 03 to display light, the embodiment of the present invention does not limit the specific structure of the driving circuit.

[0051] The silicon-based substrate 10 includes semiconductor materials such as single crystal silicon, polycrystalline silicon, amorphous silicon or silicon-based composite materials. The material of the insulating layer 40 may include Al2O3, SiN or SiO2, etc., and may be set according to actual needs, and is not specifically limited here. The material of the first electrode 31 includes materials such as titanium or tantalum, the material of the reflective electrode 32 may include materials such as aluminum, the material of the transparent electrode 33 includes ITO, etc., and the material of the second electrode 34 may include materials such as Ag, IZO or AZO.

[0052] The driving circuit 21 provides a driving signal to the transparent electrode 33, so that the transparent electrode 33 can provide holes. At the same time, the second electrode 35 can receive the power signal ELVSS, so that the second electrode 35 can provide electrons. The electrons and holes are recombined in the light-emitting layer 34 to excite photons and make the light-emitting device 03 emit light. When the light-emitting device 03 emits a light beam, the light beam propagating toward the reflective electrode 32 side can be reflected by the reflective electrode 32 to the light-emitting side, thereby improving the light-emitting efficiency.

[0053] It can be understood that in the related art, the reflective electrode 32 is arranged parallel to the first electrode 31, and the light beam with a larger incident angle with the reflective electrode 32 will be reflected by the reflective electrode 32 to the area where the adjacent light-emitting device 03 is located, resulting in color mixing. The light is totally reflected inside the display panel and guided laterally, which also causes light loss.

[0054] Continue to refer Figure 2In the embodiment of the present invention, a plurality of grooves 04 corresponding to the light emitting devices 03 are provided in the insulating layer 40, and parts of the first electrode 31 and the reflective electrode 32 are located in the groove 04 and extend along the sidewall of the groove 04, so that the reflective electrode 32 can form a reflective electrode with a concave shape along the sidewall of the groove 04. Since the concave mirror has the function of focusing the light beam, after the light beam emitted by the light emitting device 03 is transmitted to the surface of the reflective electrode 32 located in the groove 04, the reflective electrode 32 with a concave shape can focus and reflect the light beam to the light emitting side of the light emitting device 03, thereby preventing the reflected light beam from being emitted to the adjacent pixels to cause color mixing problems, and at the same time increasing the light output of the light emitting device 03 and reducing light loss.

[0055] In addition, the conductivity of the oxide layer formed by oxidation of the surface of the conductive layer is usually low, which will affect the conductivity of the conductive layer. In the embodiment of the present invention, a first electrode 31 with greater oxidation resistance than the reflective electrode 32 is arranged between the reflective electrode 32 and the driving circuit layer 20, so that after the first electrode 31 and the reflective electrode 32 are prepared, the rate of forming the oxide layer on the surface of the first electrode 31 is less than the rate of forming the oxide layer on the surface of the reflective electrode 32. In addition, the reflective electrode 32 located on the side of the first electrode 31 away from the silicon-based substrate 10 covers the side surface of the first electrode 31 away from the silicon-based substrate 10, further preventing the side surface of the first electrode 31 away from the silicon-based substrate 10 from being oxidized. In this way, the reliability of the first electrode 31 transmitting the electrical signal is greater than the reliability of the reflective electrode 32 transmitting the electrical signal, so the transparent electrode 33 is in contact with the conductive part 310 in the first electrode 31, so that the driving circuit 21 provides the driving signal to the transparent electrode 33 through the first electrode 31, improves the reliability of the light-emitting device receiving the driving signal, thereby ensuring the light-emitting brightness of the light-emitting device 03, and improving the display effect of the display panel 100.

[0056] The technical solution of the present invention is to set a plurality of grooves corresponding to each light-emitting device in the insulating layer of the display panel, and parts of the first electrode and the reflective electrode in the light-emitting device are located in the grooves and extend along the side walls of the grooves, so that the reflective electrode located in the grooves includes a concave shape. When the light-emitting device emits a light beam, the light beam transmitted to the reflective electrode can be focused and reflected by the reflective electrode to the light-emitting side of the light-emitting device, thereby increasing the light output of the light-emitting device and reducing light loss. At the same time, a first electrode is set between the reflective electrode and the driving circuit layer, and the oxidation resistance of the first electrode is greater than that of the reflective electrode, so that the reliability of the first electrode in transmitting the electrical signal is greater than that of the reflective electrode in transmitting the electrical signal. By contacting the transparent electrode with the conductive part of the first electrode, the driving signal provided by the driving circuit can be accurately transmitted to the transparent electrode through the first electrode, thereby improving the reliability of the light-emitting device in receiving the driving signal, thereby ensuring the light brightness of the light-emitting device and improving the display effect of the display panel.

[0057] In an optional embodiment, continue to refer to Figure 2 The material of the first electrode 31 includes at least one of titanium, tantalum, titanium nitride and tantalum nitride; the material of the reflective electrode 32 includes aluminum.

[0058] Among them, titanium, tantalum, titanium nitride or tantalum nitride have greater oxidation resistance than aluminum.

[0059] Specifically, since aluminum materials are relatively active, no matter whether a dry process or a wet process is used to prepare the reflective electrode 32 including aluminum materials, an aluminum oxide layer will be formed on the surface of the reflective electrode 32 on the side away from the silicon-based substrate 10. The aluminum oxide layer has poor conductivity and is usually used as a passivation layer to isolate the invasion of external water, oxygen, etc. If the surface of the reflective electrode 32 on the side away from the silicon-based substrate 10 is in contact with the transparent electrode 33, and then an electrical signal is provided to the transparent electrode 33 through the reflective electrode 32, the transparent electrode 33 will not be able to receive the electrical signal in time or will not receive the electrical signal due to the presence of the aluminum oxide layer, resulting in problems such as the light-emitting device 03 not being able to emit light or emitting light intermittently. Therefore, when the material of the reflective electrode 32 includes aluminum, the material of the first electrode 31 includes at least one of titanium, tantalum, titanium nitride and tantalum nitride with high oxidation resistance. An oxide layer will not be formed on the surface of the first electrode 31 in a short time or the formed oxide layer is not sufficient to block the transmission of the electrical signal, so that the conductive reliability of the first electrode 31 is greater than that of the reflective electrode 32, and then the driving signal required by the light-emitting device 03 is provided to the transparent electrode 33 through the first electrode 31, thereby improving the reliability and stability of the light-emitting device 03 in receiving the driving signal, thereby improving the light-emitting brightness of the light-emitting device 03 and the display effect of the display panel 100.

[0060] In an optional embodiment, Figure 3 A schematic diagram of the structure of another display panel provided by an embodiment of the present invention is shown in FIG. Figure 3 As shown, the display panel 100 also includes a microlens array 50, which is located on the side of the light-emitting device layer 30 away from the silicon-based substrate 10; the microlens array 50 includes a plurality of microlenses 51 corresponding to the plurality of light-emitting devices 03; in the thickness direction Z of the display panel 100, the corresponding microlenses 51 and the light-emitting devices 03 overlap.

[0061] The microlens array 50 is an array of lenses with a light aperture and a relief depth of micrometer level. The microlenses 51 in the microlens array 50 can be spherical lenses, aspherical lenses, cylindrical lenses, prisms, etc. Figure 3 Only the structure of the microlens 51 as a spherical mirror is shown in the figure, and it can also be of other shapes and can be set according to actual needs, which is not specifically limited here.

[0062] Specifically, the microlens array 50 includes a number of microlenses 51, and the light beams transmitted by each microlens 51 can be independent of each other and do not interfere with each other. After the light beam provided by the light emitting device 03 passes through the microlens array 50, each microlens 51 in the microlens array 50 can focus the light beam respectively, reduce light loss, and improve the overall brightness of the display panel 100. In addition, the light beam emitted by the display panel 100 can be adjusted and uniformized, which can eliminate the uneven brightness of the display panel and improve the brightness uniformity. The microlens array 50 can change the propagation direction of the light beam and increase the viewing angle of the display panel 100, so that when the display screen is viewed from different angles, the color and brightness of the display screen change less, so as to improve the viewing experience of the user at different positions. In addition, in the thickness direction Z of the display panel 100, by setting the corresponding microlenses 51 and the light emitting device 03 to overlap, since the microlens array 51 can improve the utilization rate of the light beam, it can help reduce the power consumption required to achieve the target brightness and extend the battery life of the light emitting device 03.

[0063] Optional, Figure 4 A structural diagram of another display panel provided by an embodiment of the present invention is shown in FIG. Figure 4 As shown, the insulating layer 40 includes at least one sub-insulating layer 41; the groove 04 includes at least one groove portion 041 corresponding to the at least one sub-insulating layer 41; the angle between the side wall of the groove portion 041 and the plane where the silicon-based substrate 10 is located, the angle away from the groove portion 041 is a first angle α, wherein 8°≤α≤45°.

[0064] Specifically, the smaller the first angle α is, the more likely the light beam incident on the surface of the reflective electrode 32 can be reflected by the reflective electrode 32 to the light-emitting side, and the greater the light intensity reflected by the reflective electrode 32 to the area where the light-emitting device 03 to which the reflective electrode 32 belongs is located, so that the display panel 100 has a higher light-emitting efficiency. If the first angle α is less than 8°, the reflective electrode 32 located in the groove portion 041 is approximately parallel to the transparent electrode 33, and the light beam with a larger incident angle to the reflective electrode 32 will be reflected by the reflective electrode 32 to the area where the adjacent light-emitting device 03 is located, resulting in color mixing. The light is totally reflected and guided laterally inside the display panel 100, which also causes light loss, so the lower limit of the first angle α is set at 8°. If the first angle α is greater than 45°, the light beam incident on the surface of the reflective electrode 32 may be reflected back and forth on the surface of the reflective electrode 32, resulting in a large number of light beams unable to be reflected to the light-emitting side of the light-emitting device 03, and the light-emitting efficiency is low. Therefore, by setting the first angle α in the range of 8° to 45°, the light extraction efficiency of the light emitting device 03 is improved, thereby improving the light extraction effect of the display panel 100 .

[0065] It should be noted that, under the premise that the insulating layer 40 includes a sub-insulating layer 41 and the groove 04 includes a groove portion 041 corresponding to the sub-insulating layer 41, when the first angle α is 50°, the light extraction efficiency of the display panel 100 is measured to be 85%. When the first angle α is 20°, the light extraction efficiency of the display panel 100 is measured to be 110%. It can be seen that setting the first angle α within 8° to 45° can significantly improve the light extraction efficiency of the display panel 100.

[0066] Understandably, Figure 4 Only the structure that the display panel 100 includes one sub-insulating layer 041 is shown. In other optional embodiments, the display panel 100 may also be provided with multiple sub-insulating layers 041, which can be arranged according to actual needs and is not specifically limited here.

[0067] In an optional embodiment, Figure 5 A schematic diagram of the structure of another display panel provided by an embodiment of the present invention is shown in FIG. Figure 5 As shown, when the groove 04 includes a plurality of groove portions 041 , in the light emitting direction Z of the display panel 100 , the angle of the first angle α located in each groove portion 041 gradually increases.

[0068] Specifically, when the insulating layer 40 includes multiple layers of sub-insulating layers 41, each sub-insulating layer 41 can be provided with a groove portion 041. By being arranged in the light emitting direction Z of the display panel 100, the angle of the first angle α located in each groove portion 041 gradually increases, so that the reflective electrode 32 located in the groove portion 041 on the side close to the silicon-based substrate 10 can reflect the light beam to the reflective electrode 32 in the groove portion 041 on the side away from the silicon-based substrate 10, and then the reflective electrode 32 on the side away from the silicon-based substrate 10 reflects the light beam to the light emitting side of the light-emitting device 03 where the reflective electrode 32 is located, so as to avoid the light beam being reflected to the area where the adjacent light-emitting device 03 is located, thereby improving the light emitting efficiency and light emitting accuracy of the light-emitting device 03.

[0069] Understandably, Figure 5 The display panel 100 shown in the figure includes two layers of sub-insulating layers 41, namely a first sub-insulating layer 411 and a second sub-insulating layer 412, the groove 04 includes a first groove portion 0411 and a second groove portion 0412, and the first angle α1 located at the first groove portion 0411 is smaller than the second angle α2 located at the second groove portion 0422. In other optional embodiments, the display panel 100 may also include three layers of sub-insulating layers 41, etc., which may be arranged according to actual needs and are not specifically limited here.

[0070] Optional, reference Figure 2-Figure 5 The display panel 100 further includes a transparent medium 60 , which is located in the groove 04 and on a side of the reflective electrode 32 facing away from the silicon-based substrate 10 .

[0071] The material of the transparent medium 60 includes silicon oxide (SiO x ), Silicon Nitride (SiN x ) or silicon oxynitride (SiON x ) etc., can be set according to actual needs and are not specifically limited here.

[0072] Specifically, a transparent medium 60 is provided on the side of the reflective electrode 32 in the groove 04 away from the silicon-based substrate 10, so that the light beam reflected by the reflective electrode 32 can be transmitted to the light-emitting side of the light-emitting device 03 through the transparent medium 60, thereby preventing the reflected light beam from being blocked and thus affecting the light output. In addition, the transparent medium 60 can fill the groove 04 flat, and the surface of the side of the transparent medium 60 in the groove 04 away from the silicon-based substrate 10 is kept in the same plane as the surface of the side of the insulating layer 40 away from the silicon-based substrate 10, thereby improving the flatness of the subsequent preparation of the transparent electrode 33 and other film layers.

[0073] Optional, Figure 6 A schematic diagram of the structure of a display panel provided by an embodiment of the present invention is shown in FIG. Figure 6 As shown, the first electrode 31 includes a flat portion 311 and an inclined portion 312 surrounding the flat portion 311 ; the inclined portion 312 extends along the side wall of the groove 04 ; and the flat portion 311 is electrically connected to the driving circuit 21 .

[0074] The extending direction of the flattened portion 311 is parallel to the plane where the silicon-based substrate 10 is located.

[0075] Specifically, by providing the flat portion 311, the first electrode 31 is electrically connected to the driving circuit 21 through the flat portion 311, thereby increasing the contact area between the first electrode 31 and the driving circuit 21, thereby increasing the reliability and stability of the first electrode 31 receiving the driving electrical signal, thereby increasing the light-emitting stability of the light-emitting device 03. In addition, the first electrode 31 further includes an inclined portion 312 surrounding the flat portion 311, so that the inclined portion 312 forms a structure similar to a concave lens, thereby increasing the efficiency of the reflective electrode 32 in focusing the reflected light beam.

[0076] Optional, Figure 7 A schematic diagram of the structure of another display panel provided by an embodiment of the present invention is shown in FIG. Figure 7 As shown, in the thickness direction Z of the display panel 100, the flattening portion 311 does not overlap with the driving circuit 21. In this way, after the flattening portion 311 extends along a plane parallel to the plane where the silicon-based substrate 10 is located, it is directly in contact with and electrically connected to the driving circuit 21, or is electrically connected to the driving circuit 21 through a conductive through hole, thereby ensuring the electrical connection stability between the flattening portion 311 and the driving circuit 21.

[0077] in, Figure 7In the figure, a transistor is used to represent the driving circuit 21. The driving circuit layer 20 includes a gate insulating layer 211, a gate layer 212 and a source-drain metal layer 213. The gate insulating layer 211 is located on the side of the silicon-based substrate 10 close to the light-emitting device 03, the gate layer 212 is located on the side of the gate insulating layer 211 away from the silicon-based substrate 10, and the source-drain metal layer 213 is located on the side of the gate layer 212 away from the silicon-based substrate 10. The gate S0 of the transistor is arranged in the gate layer 212, the first electrode S1 and the second electrode S2 of the transistor are arranged in the source-drain metal layer 213, and the active layer of the transistor is arranged in the silicon-based substrate 10. The active layer includes a first N-well S11 in contact with the first electrode S1 and a second N-well S12 in contact with the second electrode S2, so that when the gate S0 provides a corresponding electrical signal, the carriers in the active layer can be controlled to move directionally between the first N-well S11 and the second N-well S12, thereby forming a carrier movement channel, so that the first electrode S1 and the second electrode S2 can be transmitted.

[0078] Optional, Figure 8 A structural diagram of another display panel provided by an embodiment of the present invention is shown in FIG. Figure 8 As shown, in the thickness direction Z of the display panel 100, the flattening portion 311 overlaps with the driving circuit 21. In this way, the flattening portion 311 can be directly in contact with and electrically connected to the driving circuit 21, shortening the transmission path of the electrical signal, improving the transmission efficiency of the electrical signal, and improving the display response rate of the display panel 100.

[0079] Optional, reference Figure 8 The flattened portion 311 is electrically connected to the driving circuit 21 through the conductive through hole 22, and the flattened portion 311 covers the conductive through hole 22. In this way, the reliability of the electrical connection between the flattened portion 311 and the conductive through hole 22 can be ensured, thereby improving the accuracy and reliability of the flattened portion 311 receiving the electrical signal through the conductive through hole 22, and improving the light-emitting display effect of the light-emitting device 03.

[0080] Optional, Fig. 9 A schematic diagram of the structure of another display panel provided by an embodiment of the present invention is shown in FIG. Fig. 9 As shown, the display panel 100 further includes a planarization layer 70 , and the planarization layer 70 is located between the driving circuit layer 20 and the insulating layer 40 ; the planarization layer 70 includes a plurality of conductive through holes 71 .

[0081] The material of the planarization layer 70 includes SiO2 or Si3N4, etc., which can be set according to actual needs and is not specifically limited here.

[0082] Specifically, after the drive circuit layer 20 is prepared, the devices or circuits on the surface are not flat. By setting a planarization layer 70 between the drive circuit layer 20 and the insulating layer 40, the surface of the planarization layer 70 facing away from the silicon-based substrate 10 is flat, which is convenient for the subsequent preparation of subsequent film layers on the planarization layer 70, and improves the flatness of the subsequent film layers. In addition, a plurality of conductive through holes 71 can be set in the planarization layer 70, so that the flattened portion 311 is electrically connected to the drive circuit 21 through the conductive through holes 71, ensuring that the light-emitting device 03 can receive the driving electrical signal, and then display light normally.

[0083] Optional, Fig.10 A schematic diagram of the structure of a display panel provided by an embodiment of the present invention is shown in FIG. Fig.10 As shown, the display panel 100 also includes a color resist layer 80, which is located on the side of the light-emitting device layer 30 away from the silicon-based substrate 10; the color resist layer 80 includes a plurality of color resist structures 81 arranged corresponding to the plurality of light-emitting devices 03; in the thickness direction Z of the display panel 100, the corresponding color resist structures 81 overlap with the light-emitting devices 03.

[0084] Specifically, when the luminous color of the light emitting device 03 is the same as the light-transmitting color of the color-resistance structure 81, light with a different light-transmitting color from the color-resistance structure 81 can be blocked by the color-resistance structure 81, and light emitted by the light emitting device 03 with the same light-transmitting color as the color-resistance structure 81 can be emitted to the light-emitting side of the display panel 100 through the color-resistance structure 81, so as to avoid display crosstalk between light emitting devices 03 with different luminous colors, enhance color purity and contrast, and improve light-emitting effect. At the same time, the color-resistance structure 81 is set at a position overlapping 3 with the light emitting device 03, so that the color-resistance structure 81 can replace the polarizer, and compared with the structure of the polarizer, this combination makes the structure of the display panel 100 simple, which is conducive to the thinness of the display panel 100.

[0085] Optional, Fig.11 A schematic diagram of the structure of another display panel provided by an embodiment of the present invention is shown in FIG. Fig.11 As shown, the display panel 100 further includes an encapsulation layer 90 , which is located on a side of the light emitting device layer 30 facing away from the silicon-based substrate 10 .

[0086] The material of the encapsulation layer 90 includes silicon oxide (SiO x ), Silicon Nitride (SiN x ), Silicon Oxynitride (SiON x ), aluminum oxide (AlO x ) or titanium oxide (TiO x ), etc., the encapsulation layer 90 may also be a multi-layer stacked encapsulation structure of inorganic layer-organic layer-inorganic layer, which may be arranged according to actual needs and is not specifically limited here.

[0087] Specifically, by arranging the encapsulation layer 90 on the side of the light-emitting device layer 30 away from the base substrate 10, the encapsulation layer 90 can wrap each light-emitting device 03 to prevent water, fog or impurities in the outside air from entering the display panel 100, so as to protect the light-emitting device 03, enable the light-emitting device 03 to display light normally, and ensure the service life of the display panel 100.

[0088] Based on the same inventive concept, an embodiment of the present invention further provides a display device, Fig.12 is a schematic diagram of the structure of a display device provided by an embodiment of the present invention, such as Fig.12 As shown, the display device 200 includes the display panel 100 in the above embodiment, so the display device 200 provided in the embodiment of the present invention also has the beneficial effects of the display panel 100 described in the above embodiment, which will not be repeated here. Exemplarily, the display device 200 can be an AR (Augmented Reality) display device, a VR (Virtual Reality) display device, a mobile phone, a computer, or a television and other electronic display devices.

[0089] Note that the above are only preferred embodiments of the present invention and the technical principles used. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and that various obvious changes, readjustments, combinations and substitutions can be made by those skilled in the art without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in more detail through the above embodiments, the present invention is not limited to the above embodiments, and may include more other equivalent embodiments without departing from the concept of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. A display panel, characterized in that: include: Silicon-based substrate; A driving circuit layer is disposed on the silicon-based substrate; the driving circuit layer includes a plurality of driving circuits arranged in an array; A light-emitting device layer is located on a side of the driving circuit layer away from the silicon-based substrate; the light-emitting device layer includes a plurality of light-emitting devices, and the light-emitting devices include a first electrode, a reflective electrode, a transparent electrode, a light-emitting layer, and a second electrode stacked in sequence; the first electrode is electrically connected to the driving circuit; along a direction perpendicular to the plane where the silicon-based substrate is located, the first electrode includes a conductive portion that does not overlap with the reflective electrode; the transparent electrode is in contact with the conductive portion; An insulating layer, located between the driving circuit layer and the light emitting device layer; the insulating layer comprises a plurality of grooves arranged corresponding to the light emitting devices; Parts of the first electrode and the reflective electrode are located in the groove and extend along the sidewall of the groove; Along a direction perpendicular to the plane where the silicon-based substrate is located, the conductive portion and the groove do not overlap; The first electrode has a higher oxidation resistance than the reflective electrode.

2. The display panel according to claim 1, characterized in that: Also includes: A microlens array is located on a side of the light-emitting device layer away from the silicon-based substrate; the microlens array includes a plurality of microlenses corresponding to the plurality of light-emitting devices; In the thickness direction of the display panel, the corresponding micro lenses and the light emitting devices overlap.

3. The display panel according to claim 2, characterized in that: The insulating layer includes at least one sub-insulating layer; the groove includes at least one groove portion corresponding to at least one sub-insulating layer; the angle between the sidewall of the groove portion and the plane where the silicon-based substrate is located, the angle away from the groove portion is a first angle α, Among them, 8°≤α≤45°.

4. The display panel according to claim 3, characterized in that: When the groove includes a plurality of groove portions, in the light emitting direction of the display panel, the angle of the first angle α located in each of the groove portions gradually increases.

5. The display panel according to claim 1, characterized in that: The material of the first electrode includes at least one of titanium, tantalum, titanium nitride and tantalum nitride; The material of the reflective electrode includes aluminum.

6. The display panel according to claim 1, characterized in that: Also includes: A transparent medium is located in the groove and on a side of the reflective electrode facing away from the silicon-based substrate.

7. The display panel according to claim 1, characterized in that: The first electrode includes a flat portion and an inclined portion surrounding the flat portion; the inclined portion extends along a side wall of the groove; The flattening portion is electrically connected to the driving circuit.

8. The display panel according to claim 7, characterized in that: In a thickness direction of the display panel, the flattened portion does not overlap with the driving circuit.

9. The display panel according to claim 7, characterized in that: The planarizing portion overlaps the driving circuit in a thickness direction of the display panel.

10. The display panel according to claim 7, characterized in that: The flattened portion is electrically connected to the driving circuit through a conductive through hole, and the flattened portion covers the conductive through hole.

11. The display panel according to claim 10, characterized in that: Also includes: The planarization layer is located between the driving circuit layer and the insulating layer; the planarization layer includes a plurality of the conductive through holes.

12. The display panel according to claim 1, characterized in that: Also includes: A color resist layer is located on a side of the light emitting device layer away from the silicon-based substrate; the color resist layer comprises a plurality of color resist structures arranged corresponding to the plurality of light emitting devices; In the thickness direction of the display panel, the corresponding color resist structures and the light emitting devices overlap.

13. The display panel according to claim 1, characterized in that: Also includes: The encapsulation layer is located on a side of the light-emitting device layer away from the silicon-based substrate.

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

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