Light-emitting substrate, lighting device and vehicle lamp

Abstract

The embodiment of the invention provides a light-emitting substrate, a lighting device and a vehicle lamp, and relates to the technical field of display. The light-emitting substrate comprises a substrate body, a light-emitting device layer and a supporting column layer. The supporting column layer is arranged on the side, away from the substrate body, of a pixel defining layer. The supporting column layer comprises a plurality of supporting columns which are arranged at intervals; the orthographic projections of the supporting columns on the substrate are located in the orthographic projection range of the pixel defining layer on the substrate, the light-emitting area comprises a central area and an edge area which are the same in area, the edge area surrounds the central area, the total area of the orthographic projections of the supporting columns arranged in the central area on the substrate is a first area, and the total area of the orthographic projections of the supporting columns arranged in the edge area on the substrate is a second area; the total area of orthographic projections of the supporting columns arranged in the edge area on the substrate is a second area, and the second area is larger than the first area. The supporting column layer in the light-emitting substrate can effectively support the edge of the light-emitting area, the poor Newton ring caused by uneven stress of the rigid packaging edge area of the light-emitting substrate can be improved, and the light-emitting effect of the transparent light-emitting substrate is effectively improved.

Description

Technical Field

[0001] The present application relates to the field of display technology, and in particular to a light-emitting substrate, a lighting device and a vehicle lamp. Background Art

[0002] A transparent light source is a light source that can emit light and is transparent. It has a unique transparent property that makes light less likely to be obstructed during propagation, thereby achieving efficient use of light energy. With the continuous development of science and technology, transparent light sources are widely used in scientific research, medical diagnosis, information display and other fields.

[0003] Organic light-emitting diode (OLED) is a current-type organic light-emitting device. With the advancement of material science and manufacturing technology, OLED technology has developed rapidly and gradually become one of the mainstream display technologies. Among them, passive matrix organic light-emitting diode (PMOLED) is a passive matrix organic light-emitting diode display technology. It is a combination of organic materials and semiconductor technology. When current is injected into the organic light-emitting layer through the anode, the organic molecules will be excited by electrons, and the electrons will jump to a higher energy level orbit to form an excited state. When the excited electrons return to the ground state, they will release energy to generate photons and emit them, thereby forming a luminous effect. PMOLED has the advantages of low power consumption, high brightness and high contrast, and is suitable for small-sized display devices and can be applied to automotive industrial control products. Summary of the invention

[0004] The present application provides a light-emitting substrate, a lighting device and a vehicle lamp, which are used to solve the problem of defective Newton rings existing on the surface of the light-emitting substrate in the prior art.

[0005] According to one aspect of the present application, a light-emitting substrate is provided, and the light-emitting substrate includes:

[0006] A base substrate, the base substrate comprising a light-emitting area and a non-light-emitting area except the light-emitting area;

[0007] A light-emitting device layer is arranged on one side of the base substrate, and includes a pixel defining layer and a plurality of light-emitting devices, wherein the pixel defining layer is provided with a plurality of pixel openings, each pixel opening is configured to define a light-emitting area of ​​the light-emitting device, and the light-emitting device includes a first electrode, a light-emitting layer, and a second electrode stacked on the base substrate;

[0008] A support column layer is arranged on a side of the pixel defining layer away from the base substrate; the support column layer includes a plurality of support columns arranged at intervals; the orthographic projections of the plurality of support columns on the base substrate are located within the orthographic projection range of the pixel defining layer on the base substrate, the light-emitting area includes a central area and an edge area with the same area, the edge area surrounds the central area, the total area of ​​the orthographic projections of the support columns arranged in the central area on the base substrate is a first area, the total area of ​​the orthographic projections of the support columns arranged in the edge area on the base substrate is a second area, and the above-mentioned second area is larger than the first area.

[0009] In a possible implementation, the arrangement density of the support columns in the above-mentioned central area is smaller than the arrangement density of the support columns in the edge area, and / or the support surface area of ​​the support columns in the central area is smaller than the support surface area of ​​the support columns in the edge area.

[0010] In a possible implementation, a first number of support columns are arranged between every two adjacent light-emitting devices in the edge region, and a second number of support columns are arranged between every two adjacent light-emitting devices in the central region, wherein the first number is greater than the second number.

[0011] In another possible implementation, a support column with a first support surface area is arranged between every two adjacent light-emitting devices in the edge area, and a support column with a second support surface area is arranged between every two adjacent light-emitting devices in the central area, wherein the first support surface area is larger than the second support surface area.

[0012] In yet another possible implementation, the edge region includes a first edge sub-region and a second edge sub-region, and the distance between the first edge sub-region and the central region is greater than the distance between the second edge sub-region and the central region;

[0013] The arrangement density of support columns in the first edge sub-region is greater than that in the second edge sub-region, which is greater than that in the center region, and / or the support surface area of ​​support columns in the first edge sub-region is greater than that in the second edge sub-region, which is greater than that in the center region.

[0014] In another possible implementation, the light-emitting area includes a plurality of sub-light-emitting areas, each of which is provided with a plurality of light-emitting devices; the distance between the center point of the sub-light-emitting area and the center point of the light-emitting area is a first distance;

[0015] The arrangement density of the support columns of each sub-light-emitting area is positively correlated with the first distance corresponding to the sub-light-emitting area, and / or the support surface area of ​​the support columns of each sub-light-emitting area is positively correlated with the first distance corresponding to the sub-light-emitting area.

[0016] In another possible implementation, the light-emitting area includes a plurality of sub-light-emitting areas arranged at intervals, each sub-light-emitting area is provided with a plurality of light-emitting devices, and the light-emitting substrate further includes:

[0017] A metal layer is disposed between the substrate and the first electrode, and the metal layer includes a plurality of first wirings and a plurality of second wirings;

[0018] The first routing is arranged between adjacent sub-light-emitting areas, each first routing is arranged around a sub-light-emitting area, the second routing is arranged between adjacent light-emitting devices in the sub-light-emitting areas, the first electrode of the light-emitting device is electrically connected to the second routing, and the second routing arranged in the same sub-light-emitting area is electrically connected to the same first routing.

[0019] In another possible implementation, the second routing line is a mesh routing line including a plurality of routing openings, and the orthographic projection of the pixel opening on the base substrate is within the orthographic projection range of the routing opening on the base substrate.

[0020] In another possible implementation, the first electrode includes an electrode portion and an overlapping portion connected to the electrode portion, the pixel opening exposes at least a portion of the electrode portion, the overlapping portion is stacked between the second wiring and the pixel defining layer, and the overlapping portion overlaps the second wiring.

[0021] In another possible implementation, the second routing line includes an overlapping area, and the overlapping portion of the first electrode overlaps the overlapping area; the light-emitting substrate also includes a passivation layer, which is arranged on the side of the metal layer away from the base substrate, and the passivation layer is provided with a passivation opening, and the passivation opening exposes the overlapping area of ​​the second routing line, and the first electrode is arranged in the passivation opening.

[0022] In another possible implementation, the orthographic projection area of ​​the passivation opening on the substrate includes a first opening area and at least one second opening area located on one side of the first opening area, and the second opening area is connected to the first opening area.

[0023] In another possible implementation, the light-emitting substrate further includes:

[0024] The buffer layer is arranged between the back plate and the metal layer; the thickness of the buffer layer is greater than the thickness of the electrode part.

[0025] In another possible implementation, a ratio of the thickness of the buffer layer to the thickness of the electrode portion is K, and 1.25≤K≤3.75.

[0026] In another possible implementation, the thickness of the buffer layer is D1. The thickness of the electrode is D2.

[0027] In another possible implementation, the base substrate is a transparent base substrate, and the first electrode and the second electrode are transparent electrodes.

[0028] According to another aspect of the embodiments of the present application, a lighting device is provided, comprising the light-emitting substrate shown in the first aspect of the present application.

[0029] According to another aspect of the present application, a vehicle lamp is provided, comprising the light-emitting substrate shown in the first aspect of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0031] Figure 1 A cross-sectional schematic diagram of a light-emitting substrate provided in an embodiment of the present application;

[0032] Figure 2 A schematic diagram of a curve showing the relationship between the transmittance and thickness of a second electrode of a light-emitting substrate provided in an embodiment of the present application;

[0033] Figure 3 A schematic diagram of an orthographic projection on a substrate of a light-emitting substrate provided in an embodiment of the present application;

[0034] Figure 4 A schematic diagram of a light-emitting area of ​​a light-emitting substrate provided in an embodiment of the present application;

[0035] Figure 5 A top view of the junction between the edge area and the central area of ​​a light-emitting substrate provided in an embodiment of the present application;

[0036] Figure 6 A top view of the junction between the edge area and the central area of ​​another light-emitting substrate provided in an embodiment of the present application;

[0037] Figure 7 A schematic diagram of partitioning an edge area of ​​a light-emitting substrate provided in an embodiment of the present application;

[0038] Figure 8 A top view of the junction between edge sub-regions of a light-emitting substrate provided in an embodiment of the present application;

[0039] Fig. 9 A schematic diagram of the division of a light-emitting area of ​​a light-emitting substrate provided in an embodiment of the present application;

[0040] Fig.10 A top view of a metal layer of a light-emitting substrate provided in an embodiment of the present application;

[0041] Fig.11 A cross-sectional schematic diagram of another light-emitting substrate provided in an embodiment of the present application;

[0042] Fig.12 A schematic diagram of a curve showing the relationship between the transmittance and thickness of a first electrode of a light-emitting substrate provided in an embodiment of the present application;

[0043] Figure 13-1 A cross-sectional view and a top view of the light-emitting substrate provided in an embodiment of the present application after a metal layer is evaporated during the preparation process;

[0044] Figure 13-2 A cross-sectional view and a top view of the light-emitting substrate provided in an embodiment of the present application after a passivation layer is evaporated during the preparation process;

[0045] Figure 13-3 A cross-sectional view and a top view of the light-emitting substrate provided in an embodiment of the present application after the anode layer is evaporated during the preparation process;

[0046] Figure 13-4 A cross-sectional view and a top view of the light-emitting substrate provided in an embodiment of the present application after a pixel defining layer is evaporated during the preparation process;

[0047] Figure 13-5 A cross-sectional view and a top view of the light-emitting substrate provided in an embodiment of the present application after the support column layer is evaporated during the preparation process. DETAILED DESCRIPTION

[0048] Hereinafter, embodiments of the present disclosure will be described with reference to the accompanying drawings. However, it should be understood that these descriptions are exemplary only and are not intended to limit the scope of the present disclosure. In addition, in the following description, descriptions of well-known structures and technologies are omitted to avoid unnecessary confusion of the concepts of the present disclosure.

[0049] Various structural schematic diagrams according to embodiments of the present disclosure are shown in the accompanying drawings. These figures are not drawn to scale, and some details are magnified and some details may be omitted for the purpose of clear expression. The shapes of various regions and layers shown in the figures and the relative sizes and positional relationships therebetween are only exemplary, and may deviate in practice due to manufacturing tolerances or technical limitations, and those skilled in the art may further design regions / layers with different shapes, sizes, and relative positions according to actual needs.

[0050] In the context of the present disclosure, when a layer / element is referred to as being "on" another layer / element, the layer / element may be directly on the other layer / element or an intervening layer / element may exist between them. In addition, if a layer / element is "on" another layer / element in one orientation, the layer / element may be "below" the other layer / element when the orientation is reversed.

[0051] Transparent light sources first have high transparency and high luminous efficiency, which makes the light less susceptible to scattering and absorption during propagation, and can produce stronger light output at lower energy consumption. At the same time, transparent light sources also have good stability and can maintain stable luminous performance for a long time.

[0052] Take car lights as an example. With the vigorous promotion of new energy vehicles, in order to highlight design innovation and ensure the use of vehicle lights, the demand for transparent car lights is increasing. Transparent OLED car lights retain the advantages of OLED display, such as uniform and soft light, low power consumption, wide viewing angle, thin structure, and low operating temperature. Because of its transparent characteristics, it can save more space and have a strong sense of technology when integrated with other light groups. However, the transparent car lights in the existing technology have problems such as poor Newton rings, low transparency due to green appearance, and poor brightness uniformity.

[0053] Based on the above technical problems, some embodiments of the present application arrange a support column layer including multiple support columns on the side of the pixel defining layer away from the base substrate, and the orthographic projections of the multiple spaced support columns on the base substrate are located within the orthographic projection range of the pixel defining layer on the base substrate; wherein, the total area of ​​the orthographic projections of the support columns arranged in the central area on the base substrate is a first area, and the total area of ​​the orthographic projections of the support columns arranged in the edge area on the base substrate is a second area, and the second area is larger than the first area; that is, the support column layer of the light-emitting substrate provided in the present application has a support surface at the edge of the light-emitting area that is larger than the support surface at the center of the light-emitting area, and can effectively support the edge of the light-emitting area, can improve the poor Newton rings in the edge area of ​​the rigid package of the light-emitting substrate due to uneven force, and effectively improve the light-emitting effect of the transparent light-emitting substrate.

[0054] The following is a detailed description of the technical solution of the present application and how the technical solution of the present application solves the above-mentioned technical problems with specific embodiments. The following specific embodiments can be combined with each other, and the same or similar concepts or processes may not be repeated in some embodiments. The embodiments of the present application will be described below in conjunction with the accompanying drawings.

[0055] In an embodiment of the present application, a light-emitting substrate is provided, such as Figure 1 As shown, the light emitting substrate includes: a base substrate 110 , a light emitting device layer 150 and a support column layer 180 .

[0056] Specifically, the substrate includes a light-emitting area and a non-light-emitting area other than the light-emitting area. The substrate is a transparent substrate. The material of the substrate may include glass, TFE (tetrafluoroethylene) or transparent plastic, etc., which is not specifically limited in the embodiments of the present application. The substrate is used to support and protect the light-emitting device layer and the support column layer stacked in sequence, and the light transmittance of the substrate is greater than 90%.

[0057] The light-emitting device layer 150 is arranged on one side of the base substrate 110, including a pixel defining layer 140 and a plurality of light-emitting devices 130. The pixel defining layer 140 is provided with a plurality of pixel openings, each pixel opening being configured to define a light-emitting area of ​​the light-emitting device 130. The light-emitting device 130 includes a first electrode 131, a light-emitting layer 132 and a second electrode 133 stacked on the base substrate 110, and the first electrode 131 and the second electrode 133 are transparent electrodes. One of the first electrode 131 and the second electrode 133 is an anode of the light-emitting device 130, and the other is a cathode of the light-emitting device 130. The embodiment of the present disclosure takes the first electrode 131 as an anode and the second electrode 133 as a cathode as an example. Each light-emitting device is arranged in a pixel opening area, and the shape of the pixel opening area can be rectangular, circular or irregular polygonal, etc., which is not specifically limited in the embodiment of the present application.

[0058] In some embodiments, Figure 13-4 , which are a cross-sectional view and a top view of a single light-emitting device on a light-emitting substrate after evaporation of a pixel defining layer, wherein a pixel defining layer 1406 is disposed around the light-emitting device.

[0059] Optionally, the material of the pixel definition layer may be PR (Positive Resist, photosensitive adhesive material) glue or SiN X (silicon nitride), SiO2 (silicon dioxide) and other inorganic materials.

[0060] Optionally, the first electrode may be, but is not limited to, an indium tin oxide (ITO) layer, a zinc oxide (ZnO) layer, etc., which are not limited here. The indium tin oxide layer and the zinc oxide (ZnO) layer both have good electrical conductivity and a light transmittance greater than 90%.

[0061] The light emitting layer may include an electron transport layer, a light emitting layer, and a hole transport layer stacked in sequence. It should be noted that the light transmittance of the light emitting layer provided in the embodiment of the present application is greater than 90%.

[0062] Further, the light-emitting principle of the light-emitting layer is: under the action of an external electric field, the electron transport layer injects electrons into the light-emitting layer, and the hole transport layer injects holes into the light-emitting layer. After the electrons and holes are injected into the light-emitting layer, they are bound together by Coulomb force to form electron-hole pairs (i.e., excitons), and the electron-hole pairs radiate and transition to release energy and emit photons to emit light. Among them, the electron transport layer can adopt an organic molecular layer or organic polymer layer such as a 1,3,4-oxadiazole layer or a 1,3,4-triazole layer. The 1,3,4-oxadiazole layer and the 1,3,4-triazole layer have good electron mobility and high thermal stability, and are suitable as electron transport layers; the hole transport layer can adopt an organic molecular layer or organic polymer layer such as a triaromatic amine compound. The triaromatic amine compound has good hole mobility and high thermal stability, and is suitable as a hole transport layer. The light-emitting layer can adopt a polyphenylene vinylene layer, a conjugated molecule layer, etc., which is not limited here.

[0063] The second electrode can be an alloy layer of metals such as silver, aluminum or magnesium, which is not limited here. Taking the second electrode made of MgAg (magnesium-silver alloy) or AL (aluminum) as an example, the relationship between the transmittance and thickness of the second electrode is as follows: Figure 2 As shown, from Figure 2 It can be seen that the thickness is greater than After that, its light transmittance drops significantly; therefore, its thickness can be set to D3. For example, the thickness of the second electrode may be You can also or

[0064] The support column layer 180 is arranged on the side of the pixel defining layer 140 away from the base substrate 110; the encapsulation layer 111 is arranged on the side of the support column layer 180 away from the base substrate 110, and the material of the encapsulation layer can be glass or TFE, which is used to protect the electronic devices under it; wherein, the support column layer includes a plurality of support columns arranged at intervals; the orthographic projections of the plurality of support columns on the base substrate are located within the orthographic projection range of the pixel defining layer on the base substrate; the support column layer is used to support the encapsulation layer.

[0065] In some embodiments, Figure 13-5 As shown, S25 is a cross-sectional view and a top view of a single light-emitting device of the light-emitting substrate after the support column layer is evaporated. The single light-emitting device is adjacent to two support columns. The support columns can be cones or cylinders. The side walls of the support columns can be flat or curved. The supporting surface can be rectangular, circular or elliptical, etc., which is not specifically limited in the embodiments of the present application.

[0066] like Figure 3As shown, the multiple circular shadows 210 are the first orthographic projections of the support pillars on the base substrate, the mesh structure 220 is the second orthographic projection of the pixel defining layer on the base substrate, and the first orthographic projection is located within the range of the second orthographic projection.

[0067] Specifically, Figure 4 As shown, the base substrate 110 includes a light-emitting area 310 and a non-light-emitting area 320 surrounding the light-emitting area; the light-emitting area includes a central area 311 and an edge area 312 of the same area, the edge area 312 surrounds the central area 311, the total area of ​​the orthographic projections of the supporting columns arranged in the central area 311 on the base substrate 110 is a first area, and the total area of ​​the orthographic projections of the supporting columns arranged in the edge area 312 on the base substrate 110 is a second area, and the above-mentioned second area is larger than the first area.

[0068] In an embodiment of the present application, a support column layer including a plurality of support columns is arranged on a side of the pixel defining layer away from the base substrate, and the orthographic projections of the plurality of spaced support columns on the base substrate are located within the range of the orthographic projections of the pixel defining layer on the base substrate; wherein the total area of ​​the orthographic projections of the support columns arranged in the central area on the base substrate is a first area, and the total area of ​​the orthographic projections of the support columns arranged in the edge area on the base substrate is a second area, and the second area is larger than the first area; that is, the support column layer of the light-emitting substrate provided in the present application has a support surface at the edge of the light-emitting area that is larger than the support surface at the center of the light-emitting area, and can effectively support the edge of the light-emitting area, can improve the poor Newton rings caused by uneven force in the edge area of ​​the rigid package of the light-emitting substrate, and effectively improve the light-emitting effect of the transparent light-emitting substrate.

[0069] A possible implementation method is provided in an embodiment of the present application, wherein the arrangement density of the support columns in the above-mentioned central area is smaller than the arrangement density of the support columns in the edge area, and / or the support surface area of ​​the support columns in the central area is smaller than the support surface area of ​​the support columns in the edge area.

[0070] A possible implementation method is provided in an embodiment of the present application, where a first number of support columns are arranged between every two adjacent light-emitting devices in the edge area, and a second number of support columns are arranged between every two adjacent light-emitting devices in the central area, wherein the first number is greater than the second number.

[0071] In some embodiments, Figure 5 As shown, it is a partial top view of the junction of the edge area and the central area. Three support columns 410 are arranged between every two adjacent light-emitting devices 130 in the edge area, and two support columns 410 are arranged between every two adjacent light-emitting devices 130 in the central area.

[0072] A possible implementation method is provided in an embodiment of the present application, wherein a support column with a first support surface area is arranged between every two adjacent light-emitting devices in the above-mentioned edge area, and a support column with a second support surface area is arranged between every two adjacent light-emitting devices in the central area, wherein the first support surface area is greater than the second support surface area.

[0073] In some embodiments, Figure 6 , which is a partial top view of the junction of the edge region and the central region, wherein the support surface area of ​​the support column arranged in the edge region is larger than the support surface area of ​​the support column arranged in the central region; at the same time, three support columns 410 are arranged between every two adjacent light-emitting devices 130 in the edge region, and two support columns 410 are arranged between every two adjacent light-emitting devices 130 in the central region. The support strength of the rigid package in the edge region is further improved, and the Newton ring defect is improved.

[0074] A possible implementation method is provided in an embodiment of the present application. The edge region includes a first edge sub-region and a second edge sub-region. The distance between the first edge sub-region and the central region is greater than the distance between the second edge sub-region and the central region.

[0075] like Figure 7 As shown, the edge region 312 includes a first edge sub-region 620 and a second edge sub-region 610 , and the distance between the first edge sub-region 620 and the central region 311 is greater than the distance between the second edge sub-region 610 and the central region 311 .

[0076] The arrangement density of support columns in the first edge sub-region is greater than that in the second edge sub-region, which is greater than that in the center region, and / or the support surface area of ​​support columns in the first edge sub-region is greater than that in the second edge sub-region, which is greater than that in the center region.

[0077] like Figure 8 As shown, it is a partial top view of the junction of the first edge sub-region 620 and the second edge sub-region 610, wherein the support surface area of ​​the support column 410 arranged in the first edge sub-region 620 is larger than the support surface area of ​​the support column 410 arranged in the second edge sub-region 610; at the same time, three support columns 410 are arranged between every two adjacent light-emitting devices 130 in the first edge sub-region 620, and two support columns 410 are arranged between every two adjacent light-emitting devices 130 in the second edge sub-region 610. The embodiment of the present application further divides the edge region 312 into zones to arrange support columns, thereby effectively improving the uniformity of the support strength of the rigid package in the edge region, reducing the deformation of the rigid package caused by stress, and improving the Newton ring defect.

[0078] A possible implementation method is provided in an embodiment of the present application. The above-mentioned light-emitting area includes multiple sub-light-emitting areas, each sub-light-emitting area is provided with multiple light-emitting devices; the distance between the center point of the sub-light-emitting area and the center point of the light-emitting area is the first distance.

[0079] The arrangement density of the support columns of each sub-light-emitting area is positively correlated with the first distance corresponding to the sub-light-emitting area, and / or the support surface area of ​​the support columns of each sub-light-emitting area is positively correlated with the first distance corresponding to the sub-light-emitting area.

[0080] like Fig. 9 As shown, the light-emitting area 310 includes multiple sub-light-emitting areas, for example, sub-light-emitting area 810, sub-light-emitting area 820, sub-light-emitting area 830, etc. The larger the first distance of the sub-light-emitting area from the center point 801, the greater the setting density of the support columns of the sub-light-emitting area, and at the same time, the larger the supporting surface area of ​​the support columns of the sub-light-emitting area; that is, as the first distances of the sub-light-emitting areas 810, 820, and 830 from the center point 801 gradually increase, the setting density of the support columns of the sub-light-emitting areas 810, 820, and 830 gradually increases in sequence, and at the same time, the supporting surface areas of the support columns of the sub-light-emitting areas 810, 820, and 830 can also gradually increase in sequence.

[0081] A possible implementation method is provided in an embodiment of the present application. The light-emitting area includes a plurality of sub-light-emitting areas arranged at intervals, each sub-light-emitting area is provided with a plurality of light-emitting devices, and the light-emitting substrate also includes a metal layer.

[0082] like Figure 1 As shown, the metal layer 160 is disposed between the base substrate 110 and the first electrode 131 , and the metal layer includes a plurality of first wirings and a plurality of second wirings.

[0083] Specifically, the material of the metal layer can be Ti-AL-Ti (aluminum-titanium alloy) or Mo-AL-MO (aluminum-molybdenum alloy) or Cr-AL-Cr (aluminum-chromium alloy), with a thickness of D4. For example, the thickness of the metal layer can be You can also or

[0084] like Fig.10As shown, it is a top view of the metal layer, the first wiring 920 is arranged between adjacent sub-light-emitting areas 910, each first wiring 920 is arranged around a sub-light-emitting area 910, the second wiring 930 is arranged between adjacent light-emitting devices 940 in the sub-light-emitting area 910, the first electrode of the light-emitting device 940 is electrically connected to the second wiring 930, and the second wiring 930 arranged in the same sub-light-emitting area 910 is electrically connected to the same first wiring 920. A wiring area is arranged on one side of the light-emitting area, and the wiring area is arranged with VDD ( work Operating voltage ) signal line and a VSS (common ground voltage) signal line, the first wiring of each sub-light-emitting area can be individually connected to a VDD signal line to achieve partition control based on the sub-light-emitting area.

[0085] In some embodiments, Figure 13-1 , which are a cross-sectional view and a top view of a single light-emitting device on a light-emitting substrate after the metal layer is evaporated, and the metal layer 1403 is arranged around the light-emitting device.

[0086] A possible implementation method is provided in an embodiment of the present application, where the second routing line is a mesh routing line including a plurality of routing openings, and the orthographic projection of the pixel opening on the substrate is within the orthographic projection range of the routing opening on the substrate.

[0087] In the embodiment of the present application, each first routing line can be connected to the power supply terminal individually, and each sub-light-emitting area can be controlled individually through the first routing line; at the same time, the second routing lines arranged in each adjacent light-emitting device are mesh routing lines that extend in all directions and are connected to the first electrode of the light-emitting device, and the second routing lines arranged in the same sub-light-emitting area are electrically connected to the same first routing line. Since the second routing line is thinner than the first routing line, it will not affect the light transmittance of the light-emitting area. The effective light-emitting area of ​​the transparent display area can account for 80% to 90%, which effectively improves the light-emitting efficiency of the light-emitting substrate.

[0088] A possible implementation method is provided in the embodiment of the present application, such as Fig.11 As shown, the first electrode 131 includes an electrode portion 1311 and a overlapping portion 1312 connected to the electrode portion 1311, the pixel opening exposes at least a portion of the electrode portion 1311, the overlapping portion 1312 is stacked between the second wiring and the pixel defining layer 140, and the overlapping portion 1312 overlaps the second wiring. Fig.11 The dotted line in FIG. 1 is only used to distinguish the electrode portion 1311 from the overlapping portion 1312 . In a specific practical implementation, the electrode portion 1311 and the overlapping portion 1312 may be arranged in an integrated manner.

[0089] In some embodiments, Figure 13-3As shown, it is a cross-sectional view and a top view of a single light-emitting device of the light-emitting substrate after the anode layer (ie, the first electrode) is evaporated. The anode layer 1405 includes an electrode portion 1425 and a lap portion 1415 connected to the electrode portion 1425 , and the lap portion 1415 overlaps the metal layer 1403 .

[0090] A possible implementation method is provided in the embodiment of the present application, such as Fig.11 As shown, the second wiring includes an overlap region 1601, and the overlap portion 1312 of the first electrode 131 overlaps the overlap region 1601; the light-emitting substrate also includes a passivation layer 170, which is arranged on the side of the metal layer 160 away from the base substrate 110, and the passivation layer 170 is provided with a passivation opening, and the passivation opening exposes the overlap region 1601 of the second wiring, and the first electrode 131 is arranged in the passivation opening. The passivation layer is used to protect the electronic devices thereunder, and prevent them from being contaminated by moisture and impurities, which may cause the physical and electrical properties of the devices to be damaged.

[0091] Specifically, the material of the passivation layer can be SiN X Or SiO2, whose thickness is D5, For example, the thickness of the passivation layer can be You can also or

[0092] A possible implementation method is provided in an embodiment of the present application, where the orthographic projection area of ​​the passivation opening on the substrate includes a first opening area and at least one second opening area located on one side of the first opening area, and the second opening area is connected to the first opening area.

[0093] In some embodiments, Figure 13-2 , which are a cross-sectional view and a top view of a single light-emitting device of a light-emitting substrate after the passivation layer is evaporated, the passivation layer 1404 includes a first passivation opening 1414 and a second passivation opening 1424 , and the first passivation opening 1414 and the second passivation opening 1424 are connected.

[0094] In an embodiment of the present application, the first electrode is directly overlapped with the second trace of the metal layer through the overlap portion, and the current of the metal layer can directly flow to the first electrode. Different from the design of a serial high-impedance resistor between the metal layer and the first electrode in the prior art, the embodiment of the present application can effectively improve the brightness uniformity of the light-emitting substrate and improve the luminous efficiency.

[0095] A possible implementation method is provided in an embodiment of the present application, where the light-emitting substrate further includes a buffer layer.

[0096] like Fig.11 As shown, the buffer layer 120 is disposed between the base substrate 110 and the metal layer 160 .

[0097] Optionally, the thickness of the buffer layer is greater than the thickness of the electrode portion.

[0098] A possible implementation method is provided in an embodiment of the present application, where the ratio of the thickness of the buffer layer to the thickness of the electrode portion is K, 1.25≤K≤3.75; for example, the ratio K can be 1.3, 1.5 or 3.5, which is not specifically limited in the embodiment of the present application.

[0099] A possible implementation method is provided in an embodiment of the present application. The thickness of the buffer layer is D1. The material of the buffer layer can be SiN X Or SiO2, for example, when SiO2 is used as a buffer layer, its thickness can be You can also or

[0100] Optionally, taking the first electrode made of ITO as an example, the relationship between the light transmittance and thickness of the first electrode is as follows: Fig.12 As shown, from Fig.12 It can be seen that the thickness is The transmittance is relatively stable; therefore, the thickness of the electrode portion can be set to D2. The thickness of the ITO film can be You can also or

[0101] In some embodiments, an appearance color test experiment can be performed for various first electrode thicknesses and different buffer layer thicknesses. In the experiment, it can be found that the thickness of the first electrode Under the condition of no change, the thickness of buffer layer is set successively as well as By inspecting the appearance of the light-emitting substrate in sequence, it can be seen that the thickness of the buffer layer is When the thickness of the buffer layer is When the thickness of the buffer layer is 0.5, the appearance is obviously green, and the higher the thickness of the buffer layer, the more obvious the green is and the lower the appearance transparency is. Under the condition that the thickness of the first electrode is unchanged, the thickness of the first electrode is set in sequence as well as By inspecting the appearance of the light-emitting substrate in sequence, it can be seen that the thickness of the first electrode is When the thickness of the first electrode is When the thickness of the buffer layer is higher, the green color becomes more obvious and the transparency of the appearance becomes lower.

[0102] In the embodiment of the present application, by minimizing the thickness of the electrode portion and the buffer layer, the thickness of the first electrode can be matched with the buffer layer, thereby improving the green appearance of the light-emitting substrate, ensuring the transparency of the display area, and further improving the light-emitting efficiency of the light-emitting substrate.

[0103] A light-emitting device is provided in an embodiment of the present application, including the above-mentioned light-emitting substrate provided in the embodiment of the present application, which can achieve the following compared with the related art: the embodiment of the present application arranges a support column layer including a plurality of support columns on the side of the pixel defining layer away from the base substrate, and the orthographic projections of the plurality of spaced support columns on the base substrate are located within the range of the orthographic projections of the pixel defining layer on the base substrate; wherein the total area of ​​the orthographic projections of the support columns arranged in the central area on the base substrate is a first area, and the total area of ​​the orthographic projections of the support columns arranged in the edge area on the base substrate is a second area, and the second area is greater than the first area; that is, the support column layer of the light-emitting substrate provided in the present application has a support surface at the edge of the light-emitting area that is greater than the support surface at the center of the light-emitting area, and can effectively support the edge of the light-emitting area, can improve the poor Newton rings caused by uneven force in the edge area of ​​the rigid package of the light-emitting substrate, and effectively improve the light-emitting effect of the transparent light-emitting substrate.

[0104] Optionally, the embodiment of the present application can prepare a circuit substrate through five mask plates including a metal layer, a passivation layer, an anode layer, a pixel definition layer, and a support column layer to realize the preparation of a transparent car light. The specific process steps of the transparent car light are as follows:

[0105] S1, depositing SiO2 material on the base substrate 1401 to form a buffer layer 1402.

[0106] S2, performing deposition operations based on 5 preset MASK masks respectively.

[0107] S21, Ti-AL-Ti is deposited on the side of the buffer layer 1402 away from the substrate 1401 to form a metal layer 1403; the metal layer 1403 is arranged around the light emitting device. Figure 13-1 As shown, (a) is a cross-sectional view of a single light-emitting device in the light-emitting substrate, and (b) is a top view after the metal layer is evaporated. Each light-emitting device is arranged in a pixel opening area, and the shape of the pixel opening area can be rectangular, circular, or irregular polygonal.

[0108] S22, depositing SiN on the side of the metal layer 1403 away from the substrate 1401 X Form a passivation layer 1404; Figure 13-2As shown, (a) is a cross-sectional view of a single light emitting device in a light emitting substrate, and (b) is a top view after the passivation layer is evaporated. The passivation layer 1404 may include a first passivation opening 1414 and a second passivation opening 1424, and the first passivation opening 1414 and the second passivation opening 1424 are connected.

[0109] S23, on the side of the passivation layer 1404 away from the substrate 1401, ITO is deposited to form an anode layer 1405; Figure 13-3 As shown, (a) is a cross-sectional view of a single light-emitting device in the light-emitting substrate, and (b) is a top view after the anode layer is evaporated. The anode layer 1405 may include an electrode portion 1425 and a lap portion 1415 connected to the electrode portion 1425, and the lap portion 1415 overlaps the metal layer 1403.

[0110] S24, depositing PR glue on the side of the anode layer 1405 away from the substrate 1401 to form a pixel defining layer 1406; the pixel defining layer 1406 is arranged around the light emitting device. Figure 13-4 As shown, (a) is a cross-sectional view of a single light-emitting device in a light-emitting substrate, and (b) is a top view after evaporation of a pixel defining layer.

[0111] S25, depositing PS (polystyrene) on the side of the pixel definition layer 1406 away from the base substrate 1401 to form a support column layer 1407; Figure 13-5 As shown, (a) is a cross-sectional view of a single light-emitting device in a light-emitting substrate, and (b) is a top view after the support column layer is evaporated. A single light-emitting device is adjacent to two support columns, and the support columns can be cones or cylinders, and the side walls of the support columns can be planes or arcs, and the support surface can be rectangular, circular, elliptical, etc.

[0112] S3, performing an evaporation operation on the side of the anode layer away from the substrate to sequentially form a light-emitting layer and a cathode layer, wherein the anode layer, the light-emitting device layer and the cathode layer constitute a light-emitting device;

[0113] S4, encapsulating a glass cover plate on a side of the support column layer away from the base substrate.

[0114] The embodiments of the present application can realize double-sided light-emitting lighting products including a transparent cathode, a light-emitting film layer and a transparent anode, such as taillights and transparent headlights. The lighting products provided by the embodiments of the present application can also be of multiple types with single-color or two-color matching such as red, green, and blue.

[0115] An embodiment of the present application provides a vehicle lamp, comprising the above-mentioned light-emitting substrate provided in the embodiment of the present application.

[0116] In the above description, the technical details such as the patterning of each layer are not described in detail. However, those skilled in the art should understand that various technical means can be used to form layers, regions, etc. of desired shapes. In addition, in order to form the same structure, those skilled in the art can also design methods that are not completely the same as the methods described above. In addition, although the various embodiments are described above separately, this does not mean that the measures in the various embodiments cannot be used in combination to advantage.

[0117] Although the preferred embodiments of the present application have been described, those skilled in the art may make other changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications falling within the scope of the present application.

[0118] Obviously, those skilled in the art can make various changes and modifications to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is also intended to include these modifications and variations.

Claims

1. A light-emitting substrate, characterized in that: include: A base substrate, the base substrate comprising a light-emitting area and a non-light-emitting area except the light-emitting area; A light-emitting device layer, arranged on one side of the base substrate, comprising a pixel defining layer and a plurality of light-emitting devices, wherein the pixel defining layer is provided with a plurality of pixel openings, each of the pixel openings being configured to define a light-emitting area of ​​the light-emitting device, and the light-emitting device comprising a first electrode, a light-emitting layer and a second electrode stacked on the base substrate; A support column layer is arranged on a side of the pixel defining layer away from the base substrate; the support column layer includes a plurality of support columns arranged at intervals; the orthographic projections of the plurality of support columns on the base substrate are located within the orthographic projection range of the pixel defining layer on the base substrate, the light-emitting area includes a central area and an edge area with the same area, the edge area surrounds the central area, the total area of ​​the orthographic projections of the support columns arranged in the central area on the base substrate is a first area, the total area of ​​the orthographic projections of the support columns arranged in the edge area on the base substrate is a second area, and the second area is larger than the first area.

2. The light-emitting substrate according to claim 1, characterized in that: The arrangement density of the support columns in the central area is smaller than that of the support columns in the edge area, and / or the support surface area of ​​the support columns in the central area is smaller than that of the support surface area of ​​the support columns in the edge area.

3. The light-emitting substrate according to claim 2, characterized in that: A first number of support columns are arranged between every two adjacent light emitting devices in the edge region, and a second number of support columns are arranged between every two adjacent light emitting devices in the central region, wherein the first number is greater than the second number.

4. The light-emitting substrate according to claim 2, characterized in that: A support column with a first support surface area is arranged between every two adjacent light emitting devices in the edge area, and a support column with a second support surface area is arranged between every two adjacent light emitting devices in the central area, wherein the first support surface area is larger than the second support surface area.

5. The light-emitting substrate according to claim 2, characterized in that: The edge region includes a first edge sub-region and a second edge sub-region, and the distance between the first edge sub-region and the central region is greater than the distance between the second edge sub-region and the central region; The arrangement density of the support columns in the first edge sub-region is greater than that of the support columns in the second edge sub-region, the arrangement density of the support columns in the second edge sub-region is greater than that of the support columns in the central region, and / or the support surface area of ​​the support columns in the first edge sub-region is greater than that of the support columns in the second edge sub-region, the support surface area of ​​the support columns in the second edge sub-region is greater than that of the support surface area of ​​the support columns in the central region.

6. The light-emitting substrate according to claim 2, characterized in that: The light-emitting area includes a plurality of sub-light-emitting areas, each of which is provided with a plurality of light-emitting devices; the distance between the center point of the sub-light-emitting area and the center point of the light-emitting area is a first distance; The arrangement density of the support columns of each sub-light-emitting area is positively correlated with the first distance corresponding to the sub-light-emitting area, and / or the support surface area of ​​the support columns of each sub-light-emitting area is positively correlated with the first distance corresponding to the sub-light-emitting area.

7. The light-emitting substrate according to any one of claims 1 to 6, characterized in that: The light-emitting area includes a plurality of sub-light-emitting areas arranged at intervals, each of the sub-light-emitting areas is provided with a plurality of light-emitting devices, and the light-emitting substrate further includes: A metal layer, disposed between the base substrate and the first electrode, the metal layer comprising a plurality of first wirings and a plurality of second wirings; The first routing is arranged between adjacent sub-light-emitting areas, and each of the first routings is arranged around one of the sub-light-emitting areas. The second routing is arranged between adjacent light-emitting devices in the sub-light-emitting areas, and the first electrode of the light-emitting device is electrically connected to the second routing. The second routing arranged in the same sub-light-emitting area is electrically connected to the same first routing.

8. The light-emitting substrate according to claim 7, characterized in that: The second routing line is a mesh routing line including a plurality of routing openings, and the orthographic projection of the pixel opening on the base substrate is within the orthographic projection range of the routing opening on the base substrate.

9. The light-emitting substrate according to claim 7, characterized in that: The first electrode includes an electrode portion and an overlapping portion connected to the electrode portion, the pixel opening exposes at least a portion of the electrode portion, the overlapping portion is stacked between the second wiring and the pixel defining layer, and the overlapping portion overlaps the second wiring.

10. The light emitting substrate according to claim 9, characterized in that: The second routing line includes an overlapping area, and the overlapping portion of the first electrode overlaps the overlapping area; the light-emitting substrate also includes a passivation layer, which is arranged on the side of the metal layer away from the base substrate, and the passivation layer is provided with a passivation opening, and the passivation opening exposes the overlapping area of ​​the second routing line, and the first electrode is arranged in the passivation opening.

11. The light emitting substrate according to claim 10, characterized in that: The orthographic projection area of ​​the passivation opening on the substrate includes a first opening area and at least one second opening area located on one side of the first opening area, and the second opening area is connected to the first opening area.

12. The light emitting substrate according to claim 7, characterized in that: The light-emitting substrate further comprises: A buffer layer is disposed between the back plate and the metal layer; the thickness of the buffer layer is greater than the thickness of the electrode portion.

13. The light emitting substrate according to claim 12, characterized in that: A ratio of the thickness of the buffer layer to the thickness of the electrode portion is K, and 1.25≤K≤3.

75.

14. The light emitting substrate according to claim 13, characterized in that: The thickness of the buffer layer is D1, The thickness of the electrode portion is D2, 15. The light emitting substrate according to claim 1, characterized in that: The base substrate is a transparent base substrate, and the first electrode and the second electrode are transparent electrodes.

16. A lighting device, characterized in that: The light-emitting substrate comprises the light-emitting substrate according to any one of claims 1 to 15.

17. A vehicle lamp, characterized in that: The light-emitting substrate comprises the light-emitting substrate according to any one of claims 1 to 15.

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