Color light-emitting element, display panel and manufacturing method

Abstract

The present application provides a color light-emitting element, a display panel and a manufacturing method, including a light-emitting device layer and a color conversion film layer, the light-emitting device layer emits a first light, the color conversion film layer is arranged on one side of the light-emitting surface of the light-emitting device layer, the color conversion film layer includes a blocking portion, a color conversion unit and a subtractive unit, the color conversion unit and the subtractive unit are distributed in an array in the color conversion film layer and are arranged at intervals by the blocking portion, the first light emitted by the light-emitting device layer emits a second light and a third light via the color conversion unit, and the luminous flux ratio of the first light emitted by the light-emitting device layer on the light incident surface and the light exit surface of the subtractive unit is 3:5 to 7:10. The embodiments of the present application can effectively reduce light leakage problems and avoid light loss.

Description

Technical Field

[0001] The present application relates to the field of display technology, and in particular to a color light-emitting element, a display panel, and a manufacturing method thereof. Background Art

[0002] Micro-LED display technology refers to a display technology that uses self-luminous micron-sized LEDs as light-emitting pixel units and assembles them on a driving panel to form a high-density LED array. Compared with the existing Organic Light-Emitting Diode (OLED) technology, Micro-LED has the advantages of higher brightness, better luminous efficiency and lower power consumption.

[0003] At present, in order to achieve color display of Micro-LED display panels, a color light-emitting element with a single-primary color LED as the light source is usually used, and a color conversion film layer is set on the light-emitting side of the single-primary color LED. Colored quantum dots of other colors are arranged in the color conversion film layer. The colored quantum dots can respectively produce primary colors other than the above-mentioned single primary color under the irradiation and excitation of the single-primary color LED. The light emitted by the single-primary color LED in the area without quantum dots passes directly through, thereby achieving color display of the Micro LED display panel.

[0004] However, a portion of the light emitted by the single-primary-color LED may pass through the quantum dot region and be emitted from the color conversion film layer, thereby reducing the image display quality of the liquid crystal display panel. Summary of the invention

[0005] The embodiments of the present application provide a color light-emitting element, a display panel, and a manufacturing method, which can effectively reduce light leakage problems and avoid light loss.

[0006] On the one hand, according to an embodiment of the present application, a color light-emitting element is proposed, including: a light-emitting device layer, emitting a first light; a color conversion film layer, arranged on one side of a light-emitting surface of the light-emitting device layer, the color conversion film layer including a blocking portion, a color conversion unit and an abatement unit, the color conversion unit and the abatement unit are distributed in an array in the color conversion film layer and are arranged at intervals by the blocking portion, the first light emitted by the light-emitting device layer emits a second light and a third light via the color conversion unit, and the luminous flux ratio of the first light emitted by the light-emitting device layer on the light incident surface and the light emitting surface of the abatement unit is 3:5 to 7:10.

[0007] According to one aspect of the embodiments of the present application, the subtractive unit includes a shielding portion and a first opening, and the first light emitted from the light-emitting device layer is emitted from the first opening; the area ratio of the first opening to the shielding portion is 3:5 to 7:10.

[0008] According to one aspect of the embodiment of the present application, the shielding portion and the blocking portion have the same thickness.

[0009] According to one aspect of the embodiment of the present application, there are multiple first openings, and the multiple first openings are arranged at intervals by shielding parts in the reduction unit.

[0010] According to one aspect of the embodiment of the present application, the shape of the orthographic projection of the first opening on the light-emitting device layer includes any one or more of a circle, a ring, a rectangle and a polygon.

[0011] According to one aspect of the embodiment of the present application, a plurality of first openings are distributed in an array within the abatement unit.

[0012] According to one aspect of an embodiment of the present application, a color conversion unit includes a first color conversion unit and a second color conversion unit, the first color conversion unit includes at least quantum dots that can be excited by the first light to generate the second light, and the second color conversion unit includes at least quantum dots that can be excited by the first light to generate the third light.

[0013] According to one aspect of an embodiment of the present application, the light-emitting device layer further includes a pixel defining layer, the pixel defining layer includes a plurality of pixel openings, each pixel opening is provided with a light-emitting structure; the projections of the color conversion unit and the subtraction unit in the first direction respectively cover the pixel openings.

[0014] According to one aspect of the embodiment of the present application, the color conversion film layer further includes a planarization portion, the planarization portion is filled between the color conversion unit and the subtraction unit; and / or the planarization portion is filled in the first opening.

[0015] On the other hand, according to an embodiment of the present application, a color light-emitting element is proposed, including: a light-emitting device layer, emitting a first light; a color conversion film layer, arranged on one side of the light-emitting device layer's light-emitting surface, the color conversion film layer including a blocking portion, a color conversion unit and a subtractive unit, the color conversion unit and the subtractive unit are distributed in an array in the color conversion film layer and are spaced apart by the blocking portion, the first light emitted by the light-emitting device layer emits a second light and a third light via the color conversion unit; wherein the subtractive unit includes a shielding portion and a first opening, the first light emitted by the light-emitting device layer is emitted from the first opening, and the area ratio of the first opening to the shielding portion is 3:5 to 7:10.

[0016] On the other hand, according to an embodiment of the present application, a display panel is provided, comprising any color light-emitting element as described above.

[0017] On the other hand, according to an embodiment of the present application, a method for manufacturing a display panel is provided, comprising:

[0018] A substrate is provided; a pixel defining layer is formed on the substrate, the pixel defining layer having a plurality of pixel openings; a light-emitting structure is formed in the pixel openings of the pixel defining layer; a color conversion film layer is formed on the pixel defining layer, the color conversion film layer comprising a blocking portion, a color conversion unit and a subtractive unit, wherein the subtractive unit comprises a shielding portion and a first opening, and the blocking portion and the shielding portion are made of the same material.

[0019] According to one aspect of an embodiment of the present application, a color conversion film layer is formed, including: forming a shading film layer on a pixel defining layer, the shading film layer having a plurality of first areas for forming a subtractive unit and a second area for forming a color conversion unit; patterning the shading film layer to form a plurality of first openings in each first area and a second opening in each second area; providing a mask to cover the plurality of first areas and forming a color conversion unit in each second opening.

[0020] According to the color light-emitting element, display panel and manufacturing method provided by the embodiments of the present application, the color light-emitting element includes a light-emitting device layer and a color conversion film layer. The color conversion film layer is arranged on one side of the light-emitting device layer, and includes a blocking portion, a color conversion unit and a subtraction unit. The color conversion unit and the subtraction unit are distributed in an array in the color conversion film layer and are arranged at intervals by the blocking portion. At least part of the first light emitted by the light-emitting device layer is converted by the color conversion unit and emits the second light and the third light, and at least part of the first light is directly emitted by the subtraction unit. By setting the luminous flux ratio of the first light on the light incident surface and the light exit surface of the subtraction unit to 3:5 to 7:10, the emission amount of the first light on the subtraction unit is reduced to compensate for the risk of excess first light being emitted from the color conversion unit due to the fact that at least part of the first light cannot be completely converted into the second light and the third light by the color conversion unit, thereby solving the light leakage problem and avoiding the loss of the first light. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solution of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0022] Figure 1 A partial structural schematic diagram of a display panel provided in an embodiment of the present application;

[0023] Figure 2 for Figure 1 Schematic diagram of the cross-sectional structure along the D-D' direction;

[0024] Figure 3 A schematic diagram of the structure of a color light-emitting element provided in an embodiment of the present application;

[0025] Figures 4 to 10 for Figure 3Schematic diagram of the structure of different examples of the middle region Q;

[0026] Fig.11 A schematic diagram of the structure of another color light-emitting element provided in an embodiment of the present application;

[0027] Fig.12 A schematic diagram of the structure of another color light-emitting element provided in an embodiment of the present application;

[0028] Fig.13 A flow chart of a method for manufacturing a display panel provided in an embodiment of the present application;

[0029] Fig.14 A flow chart of another method for manufacturing a display panel provided in an embodiment of the present application;

[0030] in:

[0031] 100-color light-emitting element; 1-light-emitting device layer; 11-pixel defining layer; 111-pixel opening; 12-light-emitting structure;

[0032] 2-color conversion film layer; 21-blocking part; 22-color conversion unit; 221-first color conversion unit; 221a-red light quantum dot; 222-second color conversion unit; 222a-green light quantum dot; 23-subtraction unit; 231-shielding part; 232-first opening; 24-flattening part;

[0033] 200-substrate;

[0034] X - first direction. DETAILED DESCRIPTION

[0035] The features and exemplary embodiments of various aspects of the present application will be described in detail below. In order to make the purpose, technical solutions and advantages of the present application clearer, the present application will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only intended to explain the present application, rather than to limit the present application. For those skilled in the art, the present application can be implemented without the need for some of these specific details. The following description of the embodiments is only to provide a better understanding of the present application by illustrating the examples of the present application.

[0036] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the statement "include..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0037] It should be understood that when describing the structure of a component, when a layer or a region is referred to as being "on" or "over" another layer or another region, it may mean that it is directly on the other layer or another region, or that other layers or regions are included between it and the other layer or another region. Moreover, if the component is turned over, the layer or a region will be "below" or "beneath" another layer or another region.

[0038] The present application provides a color light emitting element, a display panel and a manufacturing method. Figure 1 To Attachment Fig.14 Various embodiments of a color light-emitting element, a display panel, and a manufacturing method are described.

[0039] See also Figure 1 as well as Figure 2 , Figure 1 A partial structural diagram of a display panel provided in an embodiment of the present application is shown in FIG. Figure 2 for Figure 1 Schematic diagram of the cross-sectional structure along the D-D' direction.

[0040] An embodiment of the present application provides a display panel, including a substrate 200 and a color light-emitting element 100 , wherein the color light-emitting element 100 and the substrate 200 are stacked and butted against each other.

[0041] Optionally, the substrate 200 may include a substrate base and a driving circuit disposed on the substrate base, and may specifically include an active driving circuit and a passive driving circuit.

[0042] Optionally, in order to enable the display panel to achieve full-color display and prevent poor display caused by light leakage problems, thereby ensuring the display effect of the display panel, the embodiment of the present application also provides a new type of color light-emitting element 100, which can be produced and sold separately as an independent component. Of course, it can also be used in the display panels of the above-mentioned embodiments and as a component of the display panels of the above-mentioned embodiments.

[0043] See also Figure 3 , Figure 3 A schematic diagram of the structure of a color light-emitting element provided in an embodiment of the present application. The embodiment of the present application proposes a color light-emitting element 100, which includes a light-emitting device layer 1 and a color conversion film layer 2. The light-emitting device layer 1 emits a first light, and the color conversion film layer 2 is arranged on the side of the light-emitting surface of the light-emitting device layer 1. The color conversion film layer 2 includes a blocking portion 21, a color conversion unit 22, and a subtractive unit 23. The color conversion unit 22 and the subtractive unit 23 are distributed in an array in the color conversion film layer 2 and are arranged at intervals by the blocking portion 21. The first light emitted by the light-emitting device layer 1 emits a second light and a third light via the color conversion unit 22. The luminous flux ratio of the first light emitted by the light-emitting device layer 1 on the light incident surface and the light exit surface of the subtractive unit 23 is 3:5 to 7:10.

[0044] like Figure 1 As shown, the barrier 21 has a plurality of through holes arranged in an array. The barrier 21 may be made of a black light-absorbing material, or a combination of a black pigment or dye and other materials. In some embodiments, the barrier 21 is made of materials such as titanium black, lignin black, composite oxide pigments such as iron or manganese, and combinations of the above pigments. By providing the barrier 21, it is possible to prevent light of different colors passing through adjacent through holes from crosstalking with each other.

[0045] The color conversion unit 22 and the subtracting unit 23 are respectively disposed in the through hole of the blocking portion 21, and the color conversion unit 22 can emit light of a wavelength range different from that of the incident light, and the subtracting unit 23 can emit light of a wavelength range the same as that of the incident light. Exemplarily, the color conversion unit 22 can convert the first light emitted by the light-emitting device layer 1 through itself into the second light and the third light of a wavelength range different from that of the first light, and directly emit the subtracted first light after the first light is subtracted by the subtracting unit 23.

[0046] Optionally, the number of color conversion units 22 and the number of subtraction units 23 can be multiple, and the multiple color conversion units 22 and the multiple subtraction units 23 are distributed in an array, and the conversion units 22 and the subtraction units 23 are alternately and evenly distributed, thereby ensuring the display uniformity of the display panel used by the color light-emitting element 100.

[0047] By setting the luminous flux ratio of the first light on the light incident surface and the light exit surface of the reduction unit 23 to 3:5 to 7:10, the light output amount of the first light through the reduction unit 23 is reduced to compensate for the chromatic aberration problem caused by at least a part of the first light not being completely converted into the second light and the third light through the color conversion unit 22, or to compensate for the risk of the first light being emitted from the blocking part 21 due to excessive penetration, thereby solving the light leakage problem, avoiding the loss of the first light, and ensuring the display effect of the display panel.

[0048] Optionally, the thickness of each color conversion unit 22 is equal, and the thickness of the blocking portion 21 can be less than the thickness of the color conversion unit 22 to reduce production costs. Of course, the thickness of the blocking portion 21 can also be equal to the thickness of the color conversion unit 22, so as to facilitate production and improve production efficiency.

[0049] The color light-emitting element 100 provided in the embodiment of the present application can be applied to Micro-LED display technology. Of course, it can also be applied to technical fields such as LCD display technology and OLED display technology. In order to better understand the color light-emitting element 100 in the embodiment of the present application, the application in the field of Micro-LED display technology will be used as an example for illustration. It can be understood that when the color light-emitting element 100 provided in the present application is applied to the field of Micro LED display technology, the first light emitted by the light-emitting device layer 1 is blue light. Optionally, the light-emitting device layer 1 that generates the emitted light may include a blue light micro-light-emitting diode chip, so that the first light emitted by the light-emitting device layer 1 is blue light.

[0050] Since the blue light has a high transmittance, the direct emission of the blue light is reduced by setting the luminous flux ratio of the blue light on the light incident surface and the light exit surface of the reduction unit 23 to 3:5-7:10, thereby solving the blue light leakage problem and avoiding the loss of blue light.

[0051] Please continue to refer to Figure 3 As an optional embodiment, the color conversion unit 22 includes a first color conversion unit 221 and a second color conversion unit 222. The first color conversion unit 221 includes at least quantum dots that can be excited by the first light to generate the second light, and the second color conversion unit 222 includes at least quantum dots that can be excited by the first light to generate the third light.

[0052] Exemplarily, the first color conversion unit 221 is a red conversion unit, and the second color conversion unit 222 is a green conversion unit. The red conversion unit includes at least red light quantum dots 221a that can be excited by blue light to produce red light, and the green conversion unit includes at least green light quantum dots 222a that can be excited by blue light to produce green light. The red conversion unit converts its corresponding blue light into red light to form a red sub-pixel, and the green conversion unit converts its corresponding blue light into green light to form a green sub-pixel. Optionally, a quantum dot layer that can be excited to produce a corresponding color can be coated on each color conversion unit 22. For example, a red light quantum layer and a green light quantum dot layer are respectively provided in the red conversion unit and the green conversion unit, and a quantum dot layer may not be provided in the subtraction unit 23, or a transparent adhesive layer with the same thickness as the red light quantum dot layer and the green light quantum dot layer is provided to maintain the original color of the blue light and form a blue sub-pixel, thereby ensuring that the display panel can achieve full-color display. Furthermore, the quantum dot layer and the transparent adhesive layer having the same thickness make the surface of the color conversion film layer 2 smoother, which is beneficial to the stability and reliability of its own structure.

[0053] Wherein, the red conversion unit includes a photoluminescent material for generating red light, for example, a material formed by mixing light quantum dots 221a with photoresist or a material formed by mixing red organic photoluminescent material with photoresist. The green conversion unit includes a photoluminescent material for generating green light, for example, a material formed by mixing green light quantum dots 222a with photoresist or a material formed by mixing green organic photoluminescent material with photoresist. Wherein, the photoresist is a negative photoresist, and the quantum dot layer is a quantum dot material that can form a specific excitation wavelength, including but not limited to a shell made of zinc sulfide (ZnS), which can be one or more of cadmium selenide (CdSe), cadmium telluride (CdTe), cadmium sulfide (CdS) and indium phosphide (InP), perovskite, and the quantum dot material also includes a scatterer, such as titanium oxide, or silicon dioxide, etc.

[0054] When the subtractive unit 23 includes a transparent adhesive layer, it includes a transparent material, such as a transparent photoresist, a transparent polymer (such as poly methyl methacrylate (PMMA)), etc. It should be understood that the transparent adhesive layer does not need to convert the blue light emitted by the blue light micro-LED, but is used to directly transmit the blue light emitted by the blue light micro-LED.

[0055] Please also read Figures 4 to 10 , Figures 4 to 10 for Figure 3Schematic diagram of structures of different examples of the middle region Q. As an optional embodiment, the subtracting unit 23 includes a shielding portion 231 and a first opening 232, part of the first light emitted by the light-emitting device layer 1 is emitted from the first opening 232, and the area ratio of the first opening 232 to the shielding portion 231 is 3:5 to 7:10.

[0056] By providing a blocking portion 231 to prevent the first light from being emitted and a first opening 232 to allow the first light to be emitted, the direct emission amount of the first light is reduced, thereby compensating for the risk of excess first light being emitted from the color conversion unit 22 due to at least a portion of the first light not being completely converted into the second light and the third light through the color conversion unit 22, or compensating for the risk of the first light being emitted from the blocking portion 21 due to its excessive penetrating power, thereby solving the light leakage problem, avoiding the loss of the first light, and ensuring the display effect of the display panel.

[0057] Exemplarily, a transparent color resist may be disposed in the first opening 232 , or no material may be disposed in the first opening 232 , so that the first light can directly pass through the first opening 232 .

[0058] Optionally, the first opening 232 is provided as one, and the shape of the orthographic projection of the first opening 232 on the light-emitting device layer 1 includes any one of a circle, a circular ring, a rectangle and a polygon.

[0059] Depend on Figure 4 As shown, the orthographic projection shape of the shielding portion 231 on the light-emitting device layer 1 is A in length and B in width. When the orthographic projection shape of the first opening 232 on the light-emitting device layer 1 is a rectangle, its length is a and its width is b. It is only necessary to make the area ratio of the first opening 232 to the shielding portion 231, that is, ab / AB, satisfy: 3:5≤ab / AB≤7:10 to achieve the reduction of the light output of the first light and solve the light leakage problem.

[0060] Depend on Figure 5 As shown, the length and width of the orthographic projection of the shielding portion 231 on the light-emitting device layer 1 are both C. When the orthographic projection of the first opening 232 on the light-emitting device layer 1 is in the shape of a circular ring, it is only necessary to make the area ratio of the first opening 232 to the shielding portion 231, that is, π(R 2 -r 2 ) / C 2 Satisfies: 3:5≤π(R 2 -r 2 ) / C 2 ≤7:10 means reducing the light output of the first light and solving the light leakage problem.

[0061] Furthermore, it can also be designed according to one's own needs. For example, it is expected that the area ratio of the first opening 232 and the shielding portion 231 is 3:5, that is, the reduction unit 23 will dissipate 40% of the first light emission, that is, allow 60% of the first light to be emitted. At this time, it is only necessary to adjust the size of the shape of the first opening 232.

[0062] As an optional embodiment, the shielding portion 231 and the blocking portion 21 have the same thickness. This configuration can simplify the manufacturing process of the color conversion film layer 2 and facilitate the molding of the color light-emitting element 100. In addition, the shielding portion 231 and the blocking portion 21 can also be made of the same material, and only need to meet the requirement of blocking the emission of the first light.

[0063] See also Figure 6 to Figure 7 As an optional implementation, there are multiple first openings 232 , and the multiple first openings 232 are spaced apart by the shielding portion 231 in the elimination unit 23 .

[0064] There can be one first opening 232 , or more first openings 232 to improve the uniformity of the first light emission. It is understandable that as long as the ratio of the sum of the areas of the multiple first openings 232 to the area of ​​the shielding portion 231 is 3:5 to 7:10, it will be sufficient.

[0065] Among them, Figure 6 or Figure 7 The first openings 232 shown are adjusted to be in the form of four first openings 232 , and it is only necessary to ensure that the areas of the plurality of first openings 232 after adjustment are equal to those of the first openings 232 before adjustment.

[0066] See also Figures 8 to 10 In some optional embodiments, the shape of the orthographic projection of the first opening 232 on the light-emitting device layer 1 includes any one or more of a circle, an annular ring, a rectangle and a polygon.

[0067] The orthographic projections of the plurality of first openings 232 on the light-emitting device layer 1 may be in the same shape, including any one of a circle, annular ring, rectangle, and polygon. Of course, the orthographic projections of the plurality of first openings 232 on the light-emitting device layer 1 may be in different shapes, including a combination of a circle, annular ring, rectangle, and polygon, which are not limited here.

[0068] As an optional embodiment, multiple first openings 232 are distributed in an array in the subtraction unit 23. Through this arrangement, the uniformity of the first light emitted from the subtraction unit 23 can be ensured, and the frequent emission of the first light under long-term use can be prevented, resulting in unstable light output from the subtraction unit 23, thereby ensuring the stability and reliability of the color light-emitting element 100.

[0069] It is understandable that the multiple first openings 232 can also present other distribution patterns in the subtracting unit 23. It is only necessary to ensure that the multiple first openings 232 are evenly distributed in the subtracting unit 23 to ensure the uniformity of the first light emitted from the subtracting unit 23. This application does not impose any restrictions on this.

[0070] See also Fig.11 , Fig.11 A schematic diagram of the structure of another color light-emitting element provided in an embodiment of the present application. As an optional embodiment, the light-emitting device layer 1 further includes a pixel defining layer 11, the pixel defining layer 11 includes a plurality of pixel openings 111, and each pixel opening 111 is provided with a light-emitting structure 12. The projections of the color conversion unit 22 and the subtraction unit 23 in the first direction X respectively cover the pixel openings 111.

[0071] The pixel defining layer 11 includes a plurality of pixel openings 111. Optionally, the pixel openings 111 may be a trapezoidal structure. A plurality of light emitting structures 12 distributed in an array may be disposed in the pixel openings 111 and electrically connected to a driving circuit respectively, and each light emitting structure 12 is controlled to emit light by the driving circuit.

[0072] The pixel defining layer 11 may be made of an organic material, such as Cardo resin, polyimide resin or acrylic resin, to improve the flatness of the substrate surface and facilitate connection with the color conversion film layer 2. Of course, the pixel defining layer 11 may also be made of the same material as the barrier portion 21, both of which can prevent the light emitted from the light emitting structure 12 from crosstalking with each other.

[0073] Optionally, one light emitting structure 12 may be disposed in each pixel opening 111 . Of course, more than two light emitting structures 12 may also be disposed according to the size ratio between the pixel opening 111 and the light emitting structure 12 , which is not specifically limited here.

[0074] Optionally, the projections of the color conversion unit 22 and the subtraction unit 23 in the first direction X respectively cover the pixel opening 111 to ensure that the multiple light-emitting structures 12 correspond one-to-one to the multiple color conversion units 22 and the subtraction units 23, respectively, and the first light emitted by the light-emitting structure 12 can effectively enter the color conversion unit 22 and the subtraction unit 23.

[0075] Optionally, the projections of the color conversion unit 22 and the subtraction unit 23 in the first direction X can just cover the pixel opening 111, that is, the color conversion unit 22 and the subtraction unit 23 correspond to the pixel opening 111 one-to-one and have the same shape and equal area. Of course, the projection edges of the color conversion unit 22 and the subtraction unit 23 in the first direction can also be larger than the pixel opening 111, as long as the first light can effectively be emitted to the color conversion unit 22 to achieve color conversion requirements, and can be effectively emitted through the subtraction unit 23.

[0076] See also Fig.12 , Fig.12 A schematic diagram of the structure of another color light-emitting element provided in an embodiment of the present application. As an optional implementation, the color conversion film layer 2 further includes a flattening portion 24, which is filled between the color conversion unit 22 and the subtractive unit 23, that is, filled on one side of the barrier portion 21, so that the surface of the color conversion film layer 2 is smoother, which is beneficial to the stability and reliability of its own structure.

[0077] Optionally, see Figures 4 to 12 The planarizing portion 24 may also fill the first opening 232 of the subtractive unit 23 to make the surface of the color conversion film layer 2 smoother.

[0078] As an optional implementation, the embodiment of the present application also provides a color light-emitting element 100, including a light-emitting device layer 1 and a color conversion film, wherein the light-emitting device layer 1 emits a first light, and the color conversion film layer 2 is arranged on one side of the light-emitting surface of the light-emitting device layer 1. The color conversion film layer 2 includes a blocking portion 21, a color conversion unit 22 and a subtractive unit 23, the color conversion unit 22 and the subtractive unit 23 are distributed in an array in the color conversion film layer 2 and are arranged at intervals by the blocking portion 21, and the first light emitted from the light-emitting device layer 1 emits a second light and a third light via the color conversion unit 22. Among them, the subtractive unit 23 includes a shielding portion 231 and a first opening 232, and the first light emitted from the light-emitting device layer 1 is emitted from the first opening 232, and the area ratio of the first opening 232 to the shielding portion 231 is 3:5 to 7:10. Through this arrangement, the light leakage problem of the color light-emitting element 100 is reduced.

[0079] It can be understood that the above examples are all based on the example of the light-emitting structure 12 using a blue light micro-LED chip, which is an optional method. In some other examples, the light-emitting structure 12 can also use an ultraviolet light micro-LED. At this time, the subtraction unit 23 at least includes blue light quantum dots that can be excited by purple light to produce blue light. The subtraction unit 23 converts the corresponding purple light into blue sub-pixels, which can also meet the color display requirements of the display panel.

[0080] Therefore, in the color light-emitting element 100 provided in the embodiment of the present application, the first light emitted by at least part of the light-emitting structure 12 is converted into the second light and the third light by the color conversion unit 22, and the first light emitted by at least part of the light-emitting structure 12 is directly emitted by the subtraction unit 23, so as to realize color display. At the same time, since the luminous flux ratio of the first light on the light incident surface and the light exit surface of the subtraction unit 23 is set to 3:5-7:10, the emission amount of the first light on the subtraction unit 23 is reduced to compensate for the risk of excess first light being emitted from the color conversion unit 22 due to at least part of the first light not being completely converted into the second light and the third light by the color conversion unit 22, or to compensate for the risk of the first light being emitted from the blocking portion 21 due to excessive penetration of the first light, thereby solving the light leakage problem and avoiding the loss of the first light.

[0081] The display panel provided in the embodiment of the present application includes the color light-emitting element 100 of the above-mentioned embodiments. Since it has the effect of preventing light leakage and reducing light leakage loss, it can further ensure the color display requirements of the display panel, so that the display panel as a whole has a better display effect, and is easy to promote and use.

[0082] See also Fig.13 , Fig.13 A flow chart of a method for manufacturing a display panel provided in an embodiment of the present application. As an optional implementation, the embodiment of the present application also provides a method for manufacturing a display panel, which can be formed on the display panels provided in the above embodiments, and the manufacturing method includes the following steps:

[0083] S100, providing a substrate;

[0084] S200, forming a pixel defining layer 11 on a substrate, wherein the pixel defining layer 11 has a plurality of pixel openings 111;

[0085] S300 , forming a light emitting structure 12 in the pixel opening 111 of the pixel defining layer 11 ;

[0086] S400, forming a color conversion film layer 2 on the pixel defining layer 11, the color conversion film layer 2 includes a blocking portion 21, a color conversion unit 22 and a subtractive unit 23, wherein the subtractive unit 23 includes a shielding portion 231 and a first opening 232, and the blocking portion 21 and the shielding portion 231 are made of the same material.

[0087] In step S100 , the substrate may be made of a light-transmitting material such as glass or polyimide (PI).

[0088] In step S200 , a pixel defining layer 11 is located on one side of a substrate 1 and defines a plurality of pixel openings 111 .

[0089] In step S300 , the light emitting structures 12 are placed in the plurality of pixel openings 111 .

[0090] In step S400, a color conversion film layer 2 is provided on the side of the pixel defining layer 11 away from the substrate, and the color conversion film layer 2 includes a barrier portion 21, a color conversion unit 22 and a subtractive unit 23. Optionally, the barrier portion 21 may be coated first, and then the color conversion unit 22 and the subtractive unit 23 may be coated between two adjacent barrier portions 21. The present application does not limit the order of formation. The subtractive unit 23 includes a shielding portion 231 and a first opening 232. The barrier portion 21 and the shielding portion 231 are made of the same material. Optionally, the barrier portion 21 and the shielding portion 231 may be formed at the same time to simplify the forming process and improve the forming efficiency.

[0091] See also Fig.14 , Fig.14 Another method for manufacturing a display panel provided in an embodiment of the present application is a flow chart. As an optional implementation, the step S400 of forming the color conversion film layer 2 further includes:

[0092] S410, forming a light shielding film layer on the pixel defining layer 11, wherein the light shielding film layer has a plurality of first regions for forming the subtractive unit 23 and a second region for forming the color conversion unit 22;

[0093] S420, patterning the light shielding film layer to form a plurality of first openings 232 in each first region, and forming a second opening in each second region;

[0094] S430 , providing a mask to cover the plurality of first regions, and forming a color conversion unit 22 in each second opening.

[0095] In step S410, a light shielding film layer is first formed on the pixel defining layer 11, and the light shielding film layer includes a first region and a second region. Optionally, the first region and the second region have the same area.

[0096] In step S420 , the light shielding film layer in the first region is patterned to form a plurality of first openings 232 , and the light shielding film layer in the second region is removed to form second openings 232 .

[0097] In step S420 , a mask is attached to the first region, and photoluminescent materials or light-emitting quantum dots are filled in each second opening to form a color conversion unit 22 .

[0098] Although the embodiments disclosed in this application are as above, the contents described are only embodiments adopted for facilitating the understanding of this application and are not intended to limit the present invention. Any technician in the technical field to which this application belongs can make any modifications and changes in the form and details of implementation without departing from the spirit and scope disclosed in this application, but the scope of protection of this application shall still be subject to the scope defined in the attached claims.

[0099] The above is only a specific implementation of the present application. Those skilled in the art can clearly understand that for the convenience and simplicity of description, the replacement of other connection methods described above can refer to the corresponding process in the aforementioned method embodiment, and will not be repeated here. It should be understood that the protection scope of the present application is not limited to this. Any technician familiar with the technical field can easily think of various equivalent modifications or replacements within the technical scope disclosed in this application, and these modifications or replacements should be included in the protection scope of the present application.

Claims

1. A color light emitting element (100), characterized in that: include: A light emitting device layer (1) emitting a first light; A color conversion film layer (2) is arranged on one side of the light emitting surface of the light emitting device layer (1), the color conversion film layer (2) comprises a blocking portion (21), a color conversion unit (22) and a subtractive unit (23), the color conversion unit (22) and the subtractive unit (23) are arranged in an array in the color conversion film layer (2) and are arranged at intervals by the blocking portion (21), the first light emitted by the light emitting device layer (1) emits a second light and a third light via the color conversion unit (22), and the luminous flux ratio of the first light emitted by the light emitting device layer (1) on the light incident surface and the light exit surface of the subtractive unit (23) is 3:5 to 7:10; The abatement unit (23) comprises a shielding portion (231) and a first opening (232), the first light emitted by the light-emitting device layer (1) is emitted from the first opening (232), and the area ratio of the first opening (232) to the shielding portion (231) is 3:5 to 7:

10.

2. The color light emitting element (100) according to claim 1, characterized in that: The shielding portion (231) and the blocking portion (21) have the same thickness.

3. The color light emitting element (100) according to claim 1, characterized in that: There are a plurality of the first openings (232), and the plurality of the first openings (232) are arranged in intervals in the reduction unit (23) by the shielding portion (231).

4. The color light-emitting element (100) according to claim 3, characterized in that: The shape of the orthographic projection of the first opening (232) on the light-emitting device layer (1) includes any one or more of a circle, an annular ring, a rectangle and a polygon.

5. The color light-emitting element (100) according to claim 3, characterized in that: A plurality of the first openings (232) are distributed in an array within the abatement unit (23).

6. The color light emitting element (100) according to claim 1, characterized in that: The color conversion unit (22) comprises a first color conversion unit (221) and a second color conversion unit (222); the first color conversion unit (221) at least comprises quantum dots that can be excited by the first light to generate the second light, and the second color conversion unit (222) at least comprises quantum dots that can be excited by the first light to generate the third light.

7. The color light emitting element (100) according to claim 1, characterized in that: The light-emitting device layer (1) further comprises a pixel defining layer (11), wherein the pixel defining layer (11) comprises a plurality of pixel openings (111), and each of the pixel openings (111) is provided with a light-emitting structure (12); The projections of the color conversion unit (22) and the subtraction unit (23) in the first direction (X) respectively cover the pixel opening (111).

8. The color light emitting element according to claim 1, characterized in that: The color conversion film layer (2) further comprises a flattening portion (24), wherein the flattening portion (24) is filled between the color conversion unit (22) and the subtractive unit (23); And / or, the planarization portion (24) fills the first opening (232).

9. A color light emitting element (100), characterized in that: include: A light emitting device layer (1) emitting a first light; A color conversion film layer (2) is arranged on a light emitting surface side of the light emitting device layer (1), the color conversion film layer (2) comprises a blocking portion (21), a color conversion unit (22) and a subtractive unit (23), the color conversion unit (22) and the subtractive unit (23) are distributed in an array in the color conversion film layer (2) and are arranged at intervals by the blocking portion (21), and the first light emitted by the light emitting device layer (1) emits a second light and a third light via the color conversion unit (22); The abatement unit (23) comprises a shielding portion (231) and a first opening (232), the first light emitted by the light-emitting device layer (1) is emitted from the first opening (232), and the area ratio of the first opening (232) to the shielding portion (231) is 3:5 to 7:

10.

10. A display panel, characterized in that: It comprises the color light-emitting element (100) according to any one of claims 1 to 8 or comprises the color light-emitting element (100) according to claim 9.

11. A method for manufacturing a display panel, characterized in that: include: Providing a substrate (100); Forming a pixel defining layer (11) on a substrate, wherein the pixel defining layer (11) has a plurality of pixel openings (111); forming a light emitting structure (12) in the pixel opening (111) of the pixel defining layer (11); A color conversion film layer (2) is formed on the pixel defining layer (11), the color conversion film layer (2) comprising a blocking portion (21), a color conversion unit (22) and a subtractive unit (23), wherein the subtractive unit (23) comprises a shielding portion (231) and a first opening (232), the area ratio of the first opening (232) to the shielding portion (231) is 3:5 to 7:10, and the blocking portion (21) and the shielding portion (231) are made of the same material.

12. The method for manufacturing a display panel according to claim 11, characterized in that: The forming of the color conversion film layer (2) comprises: Forming a light shielding film layer on the pixel defining layer (11), the light shielding film layer having a plurality of first regions for forming the subtractive units (23) and a second region for forming the color conversion unit (22); Patterning the light shielding film layer to form a plurality of first openings (232) in each of the first regions and to form a second opening in each of the second regions; A mask is provided to cover a plurality of the first regions, and the color conversion unit (22) is formed in each of the second openings.

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