CN113782557A - A light-emitting substrate and light-emitting device - Google Patents
A light-emitting substrate and light-emitting device Download PDFInfo
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- CN113782557A CN113782557A CN202111063119.XA CN202111063119A CN113782557A CN 113782557 A CN113782557 A CN 113782557A CN 202111063119 A CN202111063119 A CN 202111063119A CN 113782557 A CN113782557 A CN 113782557A
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10H—INORGANIC LIGHT-EMITTING SEMICONDUCTOR DEVICES HAVING POTENTIAL BARRIERS
- H10H29/00—Integrated devices, or assemblies of multiple devices, comprising at least one light-emitting semiconductor element covered by group H10H20/00
- H10H29/10—Integrated devices comprising at least one light-emitting semiconductor component covered by group H10H20/00
- H10H29/14—Integrated devices comprising at least one light-emitting semiconductor component covered by group H10H20/00 comprising multiple light-emitting semiconductor components
- H10H29/142—Two-dimensional arrangements, e.g. asymmetric LED layout
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10H—INORGANIC LIGHT-EMITTING SEMICONDUCTOR DEVICES HAVING POTENTIAL BARRIERS
- H10H20/00—Individual inorganic light-emitting semiconductor devices having potential barriers, e.g. light-emitting diodes [LED]
- H10H20/80—Constructional details
- H10H20/85—Packages
- H10H20/851—Wavelength conversion means
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Abstract
一种发光基板及发光装置，所述发光基板包括：基底，设置在所述基底上的至少一个第一发光器件和至少一个第二发光器件，所述第一发光器件包括：沿垂直于所述基底方向，依次设置的第一电极和第二电极，以及设置在所述第一电极和所述第二电极之间的第一发光功能层；所述第二发光器件包括：沿垂直于所述基底方向，依次设置的第三电极和第四电极，设置在所述第三电极和所述第四电极之间的第二发光功能层，以及，设置在所述第二发光功能层的出光侧的色转换层，所述色转换层在所述基底的正投影与所述第二发光功能层在所述基底的正投影存在交叠。
A light-emitting substrate and a light-emitting device, the light-emitting substrate comprising: a base, at least one first light-emitting device and at least one second light-emitting device arranged on the base, the first light-emitting device comprising: In the direction of the substrate, the first electrode and the second electrode are arranged in sequence, and the first light-emitting functional layer is arranged between the first electrode and the second electrode; the second light-emitting device includes: In the direction of the substrate, the third electrode and the fourth electrode are arranged in sequence, the second light-emitting functional layer is arranged between the third electrode and the fourth electrode, and the light-emitting side of the second light-emitting functional layer is arranged The color conversion layer, the orthographic projection of the color conversion layer on the substrate overlaps with the orthographic projection of the second light-emitting functional layer on the substrate.
Description
Technical Field
The present disclosure relates to, but not limited to, lighting technologies, and more particularly, to a light emitting substrate and a light emitting device.
Background
The influence of different color temperatures on atmosphere making and emotion is different, and a low color temperature spectrum mainly takes red light, so that the feeling of warmth and relaxation of people is suitable for a home environment; and the proportion of blue light with high color temperature is large, so that people are more spiritual and suitable for office environment. For different occasions or time, it is necessary to provide the most suitable color temperature to achieve a high-quality lighting environment.
Disclosure of Invention
The following is a summary of the subject matter described in detail herein. This summary is not intended to limit the scope of the claims.
The embodiment of the disclosure provides a light-emitting substrate and a light-emitting device, which meet the requirement of color temperature.
The disclosed embodiment provides a light emitting substrate, including: a substrate, at least one first light emitting device and at least one second light emitting device disposed on the substrate, the first light emitting device comprising: the first electrode and the second electrode are sequentially arranged along the direction vertical to the substrate, and the first light-emitting function layer is arranged between the first electrode and the second electrode; the second light emitting device includes: the light-emitting device comprises a third electrode, a fourth electrode, a second light-emitting functional layer and a color conversion layer, wherein the third electrode and the fourth electrode are sequentially arranged along the direction perpendicular to the substrate, the second light-emitting functional layer is arranged between the third electrode and the fourth electrode, the color conversion layer is arranged on the light emitting side of the second light-emitting functional layer, and the orthographic projection of the substrate and the orthographic projection of the second light-emitting functional layer on the substrate are overlapped.
In an exemplary embodiment, the first and second light emission function layers are light emission function layers emitting the same white light.
In an exemplary embodiment, the color conversion layer is disposed on a side of the substrate away from the second light emission function layer.
In an exemplary embodiment, the color conversion layer is disposed between the substrate and the third electrode.
In an exemplary embodiment, the light-emitting substrate further includes a scattering layer disposed on the light-emitting side of the first light-emitting functional layer and the second light-emitting functional layer, and an orthogonal projection of the scattering layer on the base overlaps with an orthogonal projection of at least one of the first light-emitting functional layer on the base and an orthogonal projection of at least one of the second light-emitting functional layer on the base.
In an exemplary embodiment, the scattering layer is disposed on a side of the color conversion layer away from the second light emission functional layer.
In an exemplary embodiment, the light emitting substrate includes a plurality of first light emitting devices forming a plurality of rows of light emitting devices arranged in a first direction and each row of the first light emitting devices being arranged in a second direction, and a plurality of second light emitting devices forming a plurality of rows of light emitting devices arranged in the first direction and each row of the second light emitting devices being arranged in the second direction, and the rows of the first light emitting devices and the rows of the second light emitting devices being spaced apart in the first direction, the first direction and the second direction crossing each other.
In an exemplary embodiment, the light emitting substrate includes a plurality of first light emitting devices and a plurality of second light emitting devices, the plurality of first light emitting devices and the plurality of second light emitting devices being spaced apart in a first direction and spaced apart in a second direction, the first direction and the second direction crossing each other.
In an exemplary embodiment, the light emitting substrate includes a plurality of first light emitting devices of which first electrodes are electrically connected and electrically connected to the first pad, and a plurality of second light emitting devices of which third electrodes are electrically connected and electrically connected to the second pad, and second electrodes of the plurality of first light emitting devices and fourth electrodes of the plurality of second light emitting devices are electrically connected.
In an exemplary embodiment, the material of the color conversion layer includes at least one of: quantum dots, perovskites, fluorescent materials.
The embodiment of the present disclosure provides a light emitting device, including the light emitting substrate described in any of the above embodiments.
The disclosed embodiment includes a light emitting substrate including: a substrate, at least one first light emitting device and at least one second light emitting device disposed on the substrate, the first light emitting device comprising: the first electrode and the second electrode are sequentially arranged along the direction vertical to the substrate, and the first light-emitting function layer is arranged between the first electrode and the second electrode; the second light emitting device includes: the light-emitting device comprises a third electrode, a fourth electrode, a second light-emitting functional layer and a color conversion layer, wherein the third electrode and the fourth electrode are sequentially arranged along the direction perpendicular to the substrate, the second light-emitting functional layer is arranged between the third electrode and the fourth electrode, the color conversion layer is arranged on the light emitting side of the second light-emitting functional layer, and the orthographic projection of the substrate and the orthographic projection of the second light-emitting functional layer on the substrate are overlapped. According to the scheme provided by the embodiment, the color conversion layer is arranged, light emitted by the second light emitting function layer is converted into light with different color temperatures from light emitted by the first light emitting device, the light with the two color temperatures is mixed to obtain light with other color temperatures, and when the intensity of the light with the two color temperatures is changed, the light with different color temperatures can be output, so that the color temperature requirement is met.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention may be realized and attained by the structure particularly pointed out in the written description and drawings.
Other aspects will be apparent upon reading and understanding the attached drawings and detailed description.
Drawings
The accompanying drawings are included to provide a further understanding of the disclosed embodiments and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention.
FIG. 1 is a schematic diagram of a chromatogram provided in one embodiment;
FIG. 2 is a schematic diagram of a light-emitting substrate according to an exemplary embodiment;
FIG. 3 is a schematic diagram of a spectral light extraction of a light emitting device according to an exemplary embodiment;
FIG. 4 is a schematic view of a light-emitting substrate according to another exemplary embodiment;
FIG. 5 is a schematic view of a light-emitting substrate according to another exemplary embodiment;
FIG. 6 is a schematic view of a light-emitting substrate according to yet another exemplary embodiment;
FIG. 7 is a schematic plan view of a light-emitting substrate according to an exemplary embodiment;
fig. 8 is a schematic plan view of a light-emitting substrate according to another exemplary embodiment.
Detailed Description
Hereinafter, embodiments of the present disclosure will be described in detail with reference to the accompanying drawings. In the case of conflict, the embodiments of the present disclosure and the features of the embodiments may be arbitrarily combined with each other.
The steps illustrated in the flow charts of the figures may be performed in a computer system such as a set of computer-executable instructions. Also, while a logical order is shown in the flow diagrams, in some cases, the steps shown or described may be performed in an order different than here.
Unless defined otherwise, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this invention belongs.
In the drawings, the size of each component, the thickness of layers, or regions may be exaggerated for clarity. Therefore, the embodiments of the present disclosure are not necessarily limited to the dimensions, and the shapes and sizes of the respective components in the drawings do not reflect a true scale. Further, the drawings schematically show ideal examples, and the embodiments of the present disclosure are not limited to the shapes or numerical values shown in the drawings.
The ordinal numbers such as "first", "second", "third", etc., in this disclosure are provided to avoid confusion among the constituent elements, and do not indicate any order, number, or importance.
In the present disclosure, for convenience, terms indicating orientation or positional relationship such as "middle", "upper", "lower", "front", "rear", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like are used to explain positional relationship of constituent elements with reference to the drawings, only for convenience of description and simplification of description, and do not indicate or imply that the device or element referred to must have a specific orientation, be configured in a specific orientation, and be operated, and thus, should not be construed as limiting the present disclosure. The positional relationship of the components is changed as appropriate in accordance with the direction in which each component is described. Therefore, the words described in the disclosure are not limited thereto, and may be replaced as appropriate.
In this disclosure, the terms "mounted," "connected," and "connected" are to be construed broadly unless otherwise specifically stated or limited. For example, it may be a fixed connection, or a removable connection, or an integral connection; can be a mechanical connection, or an electrical connection; either directly or indirectly through intervening components, or both may be interconnected. The specific meaning of the above terms in the present disclosure can be understood by those of ordinary skill in the art as appropriate.
In the present disclosure, "electrically connected" includes a case where constituent elements are connected together by an element having some kind of electrical action. The "element having a certain electric function" is not particularly limited as long as it can transmit and receive an electric signal between connected components. Examples of the "element having some kind of electric function" include not only an electrode and a wiring but also a switching element such as a transistor, a resistor, an inductor, a capacitor, other elements having various functions, and the like.
In the present disclosure, "parallel" means a state in which an angle formed by two straight lines is-10 ° or more and 10 ° or less, and therefore, includes a state in which the angle is-5 ° or more and 5 ° or less. The term "perpendicular" refers to a state in which the angle formed by two straight lines is 80 ° or more and 100 ° or less, and therefore includes a state in which the angle is 85 ° or more and 95 ° or less.
In the present disclosure, "film" and "layer" may be interchanged with one another. For example, the "conductive layer" may be sometimes replaced with a "conductive film". Similarly, the "insulating film" may be replaced with an "insulating layer".
The white lights with different color temperatures and different proportions are mixed to obtain the white lights with different color temperatures. The color coordinates (x, y) of light obtained by mixing light having color coordinates (x1, y1) and light having color coordinates (x2, y2) are as follows:
x (x1-x2) x1 to + x2
y (y1-y2) y1 to + y2
FIG. 1 is a schematic chromatogram. As shown in fig. 1, the color temperature of the point a is 2000K, the color coordinates are (0.46,0.41), the color temperature of the point D is 6500K, and the color coordinates are (0.31,0.33), and white light with different color temperatures can be obtained by mixing light corresponding to the point a and light corresponding to the point D in different proportions. For example, when a light having a color temperature of 5000K and color coordinates of (0.346,0.349) is obtained, it can be known from the above formula that the light proportion corresponding to the point a is 24%, and the light proportion corresponding to the point D is 76%, that is, x is (0.46 to 0.31) × 24% +0.31 is 0.346, and y is (0.41 to 0.33) × 24% +0.33 is 0.349.
Based on this, the embodiment of the present disclosure provides a light emitting substrate, where a white light emitting functional layer (which may be a stacked (tandem) structure) may be deposited between a cathode and an anode, a color conversion layer is used to divide light emitted from the white light emitting functional layer into two parts, and the two parts of light with different intensities are mixed to obtain light with different color temperatures.
Fig. 2 is a schematic view of a light-emitting substrate according to an exemplary embodiment. As shown in fig. 2, the light emitting substrate provided in this embodiment includes a base 9, at least one first light emitting device 100 and at least one second light emitting device 200 disposed on the base 9, where the first light emitting device 100 includes: a first electrode 10 and a second electrode 11 disposed in this order in a direction perpendicular to the substrate 9, and a first light-emitting function layer 12 disposed between the first electrode 10 and the second electrode 11; the second light emitting device 200 includes: the light-emitting diode comprises a third electrode 13 and a fourth electrode 14 which are sequentially arranged along the direction perpendicular to the substrate 9, a second light-emitting functional layer 15 arranged between the third electrode 13 and the fourth electrode 14, and a color conversion layer 16 arranged on the light-emitting side of the second light-emitting functional layer 15, wherein the orthographic projection of the color conversion layer 16 on the substrate 9 is overlapped with the orthographic projection of the second light-emitting functional layer 15 on the substrate 9.
According to the scheme provided by the embodiment, the color conversion layer is arranged, light emitted by the second light emitting function layer is converted into light with different color temperatures from light emitted by the first light emitting device, the light with the two color temperatures is mixed to obtain light with other color temperatures, and when the intensity of the light with the two color temperatures is changed, the light with different color temperatures can be output, so that the color temperature requirement is met.
In an exemplary embodiment, the first and second light emission function layers 12 and 15 may be light emission function layers emitting the same white light. I.e. white light of the same color temperature. In an exemplary embodiment, the first light emitting function layer 12 and the second light emitting function layer 15 may be disposed in the same layer, and may be prepared by a single preparation process using the same material.
As shown in fig. 3, the light emitted from the first light emitting device 100 may be cold white light shown in fig. 3 (a), the light emitted from the second light emitting functional layer of the second light emitting device 200 may be cold white light shown in fig. 3 (b) (which is the same as fig. 3 (a)), and the light is converted into warm white light shown in fig. 3 (c) through a color conversion layer, that is, the light emitted from the second light emitting device 200 is warm white light shown in fig. 3 (c), and the light emitted from the first light emitting device 100 and the light emitted from the second light emitting device 200 are mixed to obtain light shown in fig. 3 (d). The light shown in (d) of fig. 3 is only an example, and when the intensity of the light emitted from the first light emitting device 100 and the light emitted from the second light emitting device 200 is changed, the color temperature of the mixed light is changed accordingly. In addition, the first and second light emission function layers shown in fig. 3 emit cold white light is merely an example, for example, the first and second light emission function layers may emit warm white light, and so on.
In some embodiments, as shown in fig. 2, the first electrode 10 and the third electrode 13 may be anodes, in which case, the second electrode 11 and the fourth electrode 14 may be cathodes, and the first electrode 10 and the third electrode 13 may be independent from each other, that is, different voltages may be applied to the first light emitting device 100 and the second light emitting device 200, respectively.
In an embodiment, the material of the anode may be selected from a high work function material, such as a transparent conductive material like ITO (Indium Tin Oxides), IZO (Indium Zinc Oxides), Tin dioxide (SnO2), Zinc Oxide (ZnO), or a metal material like silver (Ag) and its alloy, Al (aluminum) and its alloy, or a composite material of the above material stack (such as Ag/ITO, Al/ITO, Ag/IZO or Al/IZO, where "Ag/ITO" is named as a stacked structure of a metallic silver electrode and an ITO electrode stack), and the like, and the material of the cathode may be selected from a low work function material, such as lithium fluoride (LiF)/Al, metallic Al, Ag or magnesium (Mg), or a metal alloy material with a low work function (such as magnesium aluminum alloy, magnesium silver alloy), and the like.
In an exemplary embodiment, the light emitting substrate may be a bottom emission type light emitting substrate, the light emitted from the first and second light emitting devices 100 and 200 may be emitted through the base 9 side, and the first and third electrodes 10 and 13 may be transparent anodes. The disclosed embodiment is not limited thereto and the light emitting substrate may be a top emission type light emitting substrate, and the light emitted from the first and second light emitting devices 100 and 200 may be emitted through the second and fourth electrodes 11 and 14 sides. In this embodiment, light emitted from the first light emitting device 100 and the second light emitting device 200 is emitted through the substrate 9, and the color conversion layer 16 may be disposed on the substrate 9 side of the second light emitting function layer 15.
In an exemplary embodiment, the color conversion layer 16 may be disposed on a side of the substrate 9 away from the second light emitting functional layer 15. As shown in fig. 2, the color conversion layer 16 may be attached to the substrate 9.
In an exemplary embodiment, the light emitting substrate may further include: a pixel defining layer 17 disposed on the substrate 9, the pixel defining layer 17 may define a plurality of openings, and a light emitting function layer of one light emitting device may be disposed in one opening. The pixel defining layer 17 may be disposed on the side of the first electrode 10 and the third electrode 13 remote from the substrate 9. In an exemplary embodiment, an orthographic projection of the opening of the substrate where the light emitting functional layer of the second light emitting device 200 is located in an orthographic projection of the color conversion layer 16 of the second light emitting device 200. I.e. the light emitted by the second light emitting device 200 is converted by the color conversion layer 16.
In an exemplary embodiment, as shown in fig. 4, the color conversion layer 16 may be disposed between the substrate 9 and the third electrode 13. In the solution provided in this embodiment, the color conversion layer 16 is formed inside the substrate 9 (i.e., the substrate 9 is close to the second light emitting functional layer 15), and the color conversion layer 16 can be directly deposited on the substrate 9 without pasting a color conversion layer film, which is beneficial to improving yield and prolonging service life.
In an exemplary embodiment, the light emitting substrate may further include a scattering layer 19 disposed on the light emitting side of the first light emitting function layer 12 and the second light emitting function layer 15, and an orthogonal projection of the scattering layer 19 on the base 9 overlaps with an orthogonal projection of at least one of the first light emitting function layer 12 on the base 9 and an orthogonal projection of at least one of the second light emitting function layer 15 on the base 9. In the solution provided by this embodiment, the light emitted from the first light emitting device 100 and the light emitted from the second light emitting device 200 are more uniformly mixed by disposing the scattering layer to disperse the emitted light, so that a better illumination effect can be achieved at a lower resolution (for example, less than 50ppi (number of pixels per inch)). In addition, when the resolution is low, a high-precision metal mask (the size of the opening of the mask is larger than 200 micrometers (um), and the precision can also be larger than 50um) is not needed for preparing the pattern of the luminous functional layer, so that the cost is reduced. The embodiments of the present disclosure are not limited thereto and the scattering layer may not be provided. In an exemplary embodiment, the orthographic projection of the first luminescent functional layer 12 on the substrate 9 and the orthographic projection of the second luminescent functional layer 15 on the substrate 9 are located within the orthographic projection of the scattering layer 19 on the substrate 9. That is, the scattering layer scatters light emitted from all the light emitting devices, thereby improving uniformity.
In an exemplary embodiment, the scattering layer 19 may be disposed on a side of the color conversion layer 16 away from the second light emitting function layer 15, that is, the light emitted after color conversion is scattered, and the light is more uniform. However, the embodiment of the present disclosure is not limited thereto, and the scattering layer 19 may be disposed on the side of the color conversion layer 16 close to the second light emitting function layer 15.
In an exemplary embodiment, as shown in fig. 5, the scattering layer 19 may be disposed on a side of the substrate 9 adjacent to the first or second light emission functional layer 12 or 15. At this time, the scattering layer 19 may be coated on the substrate 9.
In an exemplary embodiment, as shown in fig. 6, the scattering layer 19 may be disposed on a side of the substrate 9 away from the first or second light emission functional layer 12 or 15. A scattering layer 19 may be attached to the substrate 9.
In an exemplary embodiment, the material of the scattering layer 19 may be a mixture of an organic material and a metal oxide. Such as a mixture of uv curable glue and silica particles.
The light emitting substrate may include a plurality of first light emitting devices 100 and a plurality of second light emitting devices 200, and the plurality of first light emitting devices 100 and the plurality of second light emitting devices 200 may be arranged in various ways, for example, the first light emitting devices 100 and the second light emitting devices 200 may be uniformly spaced apart from each other, but are not limited thereto.
Fig. 7 is a schematic plan view of a light-emitting substrate according to an exemplary embodiment. As shown in fig. 7, the light emitting substrate includes a plurality of first light emitting devices 100 and a plurality of second light emitting devices 200, the plurality of first light emitting devices 100 form a plurality of rows of light emitting devices arranged along a first direction X, and each row of the first light emitting devices 100 is arranged along a second direction Y, the plurality of second light emitting devices 200 form a plurality of rows of light emitting devices arranged along the first direction X, and each row of the second light emitting devices 200 is arranged along the second direction Y, and the rows formed by the first light emitting devices 100 and the rows formed by the second light emitting devices 200 are arranged at intervals along the first direction X, and the first direction X and the second direction Y intersect. In an exemplary embodiment, the first direction X and the second direction Y may be perpendicular to each other. The first electrodes 10 of the plurality of first light emitting devices 100 are electrically connected and connected to the first pad 20, the third electrodes 13 of the plurality of second light emitting devices 200 are electrically connected and connected to the second pad 30, the second electrodes 11 of the plurality of first light emitting devices 100 and the fourth electrodes 14 of the plurality of second light emitting devices 200 are electrically connected and connected to the third pad 40, and the first pad 20, the second pad 30, and the third pad 40 are respectively connected to an external driving circuit. The second electrode 11 and the fourth electrode 14 may be full-surface electrodes. In this embodiment, one first electrode 10 may be disposed on the same column of the first light emitting devices 100, that is, one first electrode 10 provides a voltage for the same column of the first light emitting devices 100, and one third electrode 13 may be disposed on the same column of the second light emitting devices 200, that is, one third electrode 13 provides a voltage for the same column of the second light emitting devices 200. In the solution provided in this embodiment, the first light emitting devices of the same color are connected in series by the conductive wires and connected to the same bonding pad, and the second light emitting devices of the other color are connected in series by the conductive wires and connected to the other bonding pad, so that the light emitting devices corresponding to the two colors can apply different voltages to generate lights with different intensities, change the intensity ratio of the two lights, and adjust the colors with different color temperatures.
Fig. 8 is a schematic plan view of a light-emitting substrate according to another exemplary embodiment. As shown in fig. 8, the light emitting substrate includes a plurality of first light emitting devices 100 and a plurality of second light emitting devices 200, the plurality of first light emitting devices 100 and the plurality of second light emitting devices 200 being spaced apart in a first direction X, and being spaced apart in a second direction Y, the first direction X and the second direction Y crossing each other. In an exemplary embodiment, the first direction X and the second direction Y may be perpendicular. In this embodiment, the first and second light emitting devices 100 and 200 are spaced apart from each other, so that light can be more uniform. The first electrodes 10 of the plurality of first light emitting devices 100 are electrically connected and electrically connected to the first pad 20, the third electrodes 13 of the plurality of second light emitting devices 200 are electrically connected and electrically connected to the second pad 30, the second electrodes 11 of the plurality of first light emitting devices 100 and the fourth electrodes 14 of the plurality of second light emitting devices 200 are electrically connected and electrically connected to the third pad 40, and the first pad 20, the second pad 30, and the third pad 40 are respectively connected to an external driving circuit.
In an exemplary embodiment, the light emitting substrate may include a light emitting area and a bezel area surrounding the light emitting area, the first and second light emitting devices 100 and 200 may be disposed at the light emitting area, the first, second, and third pads 20, 30, and 40 may be disposed at the bezel area, and the first pad 20 may be located at a first side of the light emitting area, the second pad 30 may be located at a second side of the light emitting area, and the first and second sides are not adjacent; the third pad 40 may be disposed on third and fourth sides of the light emitting region, the third and fourth sides being opposite to each other and adjacent to the first and second sides.
The connection relationship between the light emitting devices (the connection between the first electrodes 10 of the first light emitting devices, and the connection between the third electrodes 13 of the second light emitting devices 200) is illustrated by taking three rows and four columns of light emitting devices as an example. In the present embodiment, the second light emitting device 201, the second light emitting device 202, and the second light emitting device 203 are electrically connected to the second pad 30, the second light emitting device 206 is electrically connected to the second light emitting device 201, the second light emitting device 204 is electrically connected to the second light emitting device 202, the second light emitting device 207 is electrically connected to the second light emitting device 204, the second light emitting device 205 is electrically connected to the second light emitting device 203, and the second light emitting device 208 is electrically connected to the second light emitting device 205; the first light emitting device 105, the first light emitting device 106, and the first light emitting device 107 are electrically connected to the first pad 20, the first light emitting device 101 is electrically connected to the first light emitting device 103, the first light emitting device 103 is electrically connected to the first light emitting device 106, the first light emitting device 102 is electrically connected to the first light emitting device 104, and the first light emitting device 104 is electrically connected to the first light emitting device 107. The third electrodes 13 of the second light emitting devices 200 may be connected by a trace 182, the first electrodes 10 of the first light emitting devices 100 may be connected by a trace 181, and the trace 181 and the trace 182 may be disposed between the substrate 9 and the pixel defining layer 17.
In an exemplary embodiment, the material of the color conversion layer 16 may include at least one of: perovskite, quantum dot, fluorescent material, etc., as long as particles favorable for conversion can be used for the color conversion layer 16.
In an exemplary embodiment, the substrate 9 may be, but is not limited to, a glass substrate.
In an exemplary embodiment, the first Light Emitting device may be an OLED (Organic Light-Emitting Diode) Light Emitting device, and in this case, the first Light Emitting function layer and the second Light Emitting function layer may include an Organic Light Emitting layer. In other embodiments, the first Light Emitting device and the second Light Emitting device may be QLED (Quantum Dot Light Emitting Diodes) Light Emitting devices, and in this case, the first Light Emitting functional layer and the second Light Emitting functional layer may include Quantum Dot Light Emitting layers.
In an exemplary embodiment, the light emitting substrate may be any one of self-light emitting substrates such as an OLED light emitting substrate and a QLED light emitting substrate.
The embodiment of the present disclosure provides a method for manufacturing a light-emitting substrate, including:
forming at least one first light emitting device and at least one second light emitting device on a substrate, the first light emitting device comprising: the first electrode and the second electrode are sequentially arranged along the direction vertical to the substrate, and the first light-emitting function layer is arranged between the first electrode and the second electrode; the second light emitting device includes: the light-emitting device comprises a third electrode, a fourth electrode, a second light-emitting functional layer and a color conversion layer, wherein the third electrode and the fourth electrode are sequentially arranged along the direction perpendicular to the substrate, the second light-emitting functional layer is arranged between the third electrode and the fourth electrode, the color conversion layer is arranged on the light emitting side of the second light-emitting functional layer, and the orthographic projection of the substrate and the orthographic projection of the second light-emitting functional layer on the substrate are overlapped.
According to the preparation method of the light-emitting substrate provided by the embodiment of the disclosure, part of light can be converted into light with another color temperature through the color conversion layer, the light with the two color temperatures is mixed to obtain light with other color temperatures, and the light with different color temperatures is output along with the change of the intensity of the light with the two color temperatures, so that the color temperature requirement is met.
In an exemplary embodiment, the forming at least one first light emitting device and at least one second light emitting device includes:
depositing a first metal film on the substrate, and forming a wiring pattern by patterning;
depositing a second metal film, and forming a first electrode and a third electrode by patterning;
coating a pixel definition layer film, and forming a pixel definition layer pattern through a photoetching process;
sequentially evaporating an organic light-emitting material and cathode metal on the substrate with the patterns to form a first light-emitting function layer, a second electrode and a fourth electrode pattern; the second electrode and the fourth electrode form a whole-surface electrode;
and attaching a color conversion layer and a scattering layer to one side of the substrate, which is far away from the first light-emitting function layer and the second light-emitting function layer.
In another embodiment, the forming at least one first light emitting device and at least one second light emitting device includes:
coating a scattering layer film on the substrate, and forming a scattering layer pattern through a photoetching process;
coating a color conversion layer film on the substrate with the structure, and forming a color conversion layer pattern by a photoetching process;
depositing a first metal film, and forming a wiring pattern by composition;
depositing a second metal film, and forming a first electrode and a third electrode by patterning;
coating a pixel definition layer film, and forming a pixel definition layer pattern through a photoetching process;
sequentially evaporating an organic light-emitting material and cathode metal on the substrate with the patterns to form a first light-emitting function layer, a second electrode and a fourth electrode pattern; the second electrode and the fourth electrode constitute a full-area electrode.
The present disclosure provides a light emitting device, which includes the light emitting substrate described in any of the above embodiments, and may also include other components, for example, a driving circuit, such as an IC (integrated circuit), for providing an electrical signal to the light emitting substrate to drive the light emitting substrate to emit light. The driving circuit is connected to the first pad 20, the second pad 30, and the third pad 40, respectively, and may supply different voltages to the first pad 20 and the second pad 30.
The light emitting device may be a lighting device, for example, the light emitting device may be a backlight module in a liquid crystal display device, a lamp (such as a car lamp) for interior or exterior lighting, or various signal lamps.
Although the embodiments of the present invention have been described above, the above description is only for the convenience of understanding the present invention, and is not intended to limit the present invention. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (11)
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115188790A (en) * | 2022-07-12 | 2022-10-14 | 京东方科技集团股份有限公司 | Vehicle, taillight, display panel and method of making the same |
| WO2025044540A1 (en) * | 2023-08-31 | 2025-03-06 | 京东方科技集团股份有限公司 | Light-emitting substrate and manufacturing method therefor, backlight module, and display apparatus |
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| CN111370458A (en) * | 2020-03-20 | 2020-07-03 | 京东方科技集团股份有限公司 | Display substrate, preparation method thereof and display device |
| CN111785744A (en) * | 2020-08-27 | 2020-10-16 | 京东方科技集团股份有限公司 | An OLED display panel, a preparation method thereof, and a display device |
| CN113241416A (en) * | 2021-04-28 | 2021-08-10 | 合肥鑫晟光电科技有限公司 | Light-emitting substrate, preparation method thereof and light-emitting device |
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| CN111370458A (en) * | 2020-03-20 | 2020-07-03 | 京东方科技集团股份有限公司 | Display substrate, preparation method thereof and display device |
| CN111785744A (en) * | 2020-08-27 | 2020-10-16 | 京东方科技集团股份有限公司 | An OLED display panel, a preparation method thereof, and a display device |
| CN113241416A (en) * | 2021-04-28 | 2021-08-10 | 合肥鑫晟光电科技有限公司 | Light-emitting substrate, preparation method thereof and light-emitting device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115188790A (en) * | 2022-07-12 | 2022-10-14 | 京东方科技集团股份有限公司 | Vehicle, taillight, display panel and method of making the same |
| WO2025044540A1 (en) * | 2023-08-31 | 2025-03-06 | 京东方科技集团股份有限公司 | Light-emitting substrate and manufacturing method therefor, backlight module, and display apparatus |
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