Display panel, display device and preparation method of display panel

Abstract

The invention discloses a display panel, a display device and a preparation method of the display panel. The display panel comprises a substrate, a light-emitting layer, a light conversion layer and an optical selection layer. The light-emitting layer is located on one side of the substrate and comprises a plurality of light-emitting units, and the light-emitting units are used for achieving the light-emitting display function of the display panel. The light conversion layer is located on the side, away from the substrate, of the light emitting layer and comprises a limiting part and a light conversion part, the limiting part defines a limiting opening where the light conversion part can be arranged, and the light conversion part is arranged in at least one limiting opening. The light conversion part comprises a light conversion material and is used for converting light emitted by the light emitting unit into light of a specified color. The optical selection layer covers at least part of the surface of the limiting part, and the optical selection layer has different light transmittances to different wavebands. The optical selection layer can reflect the light which is not converted by the light conversion part and has high reflectivity, and then the light is circularly converted by the light conversion part, so that the color conversion efficiency of the display panel is improved.

Description

Technical Field

[0001] The present application relates to the display field, and in particular to a display panel, a display device and a method for manufacturing a display panel. Background Art

[0002] Quantum Dot (QD) is an inorganic nano-scale semiconductor material. When a certain light pressure and electric field are applied to it, it will emit light of a specific frequency, and the frequency of the emitted light will change with the size of the quantum dots. Therefore, by precisely controlling the size of the quantum dots, very pure RGB primary colors can be emitted, thereby significantly improving the color gamut. Organic Light Emitting Diode (OLED) has the characteristics of self-luminescence, ultra-lightness, fast response speed, and wide viewing angle. Blue OLED devices (BOLED) are ideal quantum dot excitation light sources. Therefore, the panel made by the combination of quantum dots and B-OLED (Blue Quantum Dot-Blue Organic Light Emitting Diode, B-OLED) has the advantages of both quantum dots and OLED, thereby improving product performance.

[0003] Existing blue light OLED devices have low color conversion efficiency. Summary of the invention

[0004] The embodiments of the present application provide a display panel, a display device, and a method for manufacturing a display panel, aiming to improve the color conversion efficiency of the display panel.

[0005] An embodiment of the first aspect of the present application provides a display panel, comprising a substrate; a light-emitting layer, located on one side of the substrate, comprising a plurality of light-emitting units; a light conversion layer, located on the side of the light-emitting layer away from the substrate, the light conversion layer comprising a defining portion and a light conversion portion, the defining portions enclosing a defined opening, at least one defined opening being provided with a light conversion portion, the light conversion portion comprising a light conversion material and being used to convert the output light of the light-emitting unit into light of a specified color; and an optical selection layer, the optical selection layer covering at least a portion of the surface of the defined portion.

[0006] According to any of the aforementioned embodiments of the first aspect of the present application, the defining portion includes a first side wall surface facing the defining opening, and the optical selection layer covers the first side wall surface.

[0007] According to any of the aforementioned embodiments of the first aspect of the present application, the reflectivity of the optical selection layer to blue light is A, the reflectivity of the optical selection layer to red light is B, and the reflectivity of the optical selection layer to green light is C, wherein A>B and A>C.

[0008] According to any of the aforementioned embodiments of the first aspect of the present application, the output light of the light-emitting unit is blue light.

[0009] According to any of the aforementioned embodiments of the first aspect of the present application, the defining portion includes a first side wall surface facing the defining opening, and the optical selection layer covers the first side wall surface.

[0010] According to any of the aforementioned embodiments of the first aspect of the present application, the optical selection layer includes a top surface arranged away from the substrate and a bottom surface arranged toward the substrate, and the optical selection layer covers the top surface and / or bottom surface of the defining portion.

[0011] According to any of the aforementioned embodiments of the first aspect of the present application, the defining portion includes a gap opening arranged through the display panel in a thickness direction, the defining portion includes a second side wall surface facing the gap opening, and the optical selection layer covers the second side wall surface.

[0012] According to any of the aforementioned embodiments of the first aspect of the present application, a filling portion is provided in the gap opening.

[0013] According to any of the aforementioned embodiments of the first aspect of the present application, it also includes a filling layer, the filling layer includes a main body and a filling part, the main body is located between the light-emitting layer and the light conversion layer, or the main body is located on the side of the light conversion layer away from the substrate.

[0014] According to any of the aforementioned embodiments of the first aspect of the present application, the filling layer is sticky and is used to bond the optical selection layer.

[0015] According to any of the aforementioned embodiments of the first aspect of the present application, it also includes an encapsulation layer, and the encapsulation layer is located between the light-emitting layer and the filling layer.

[0016] According to any of the aforementioned embodiments of the first aspect of the present application, the encapsulation layer is located between the light-emitting layer and the light conversion layer.

[0017] According to any of the aforementioned embodiments of the first aspect of the present application, the orthographic projection of the opening on the substrate is limited to at least partially overlap with the orthographic projection of the light-emitting unit on the substrate.

[0018] According to any of the aforementioned embodiments of the first aspect of the present application, the projection of the light-emitting unit is located within the projection of the defined opening.

[0019] According to any of the aforementioned embodiments of the first aspect of the present application, it also includes: a planarization layer, located on the side of the optical selection layer or the light conversion layer away from the substrate, and the material of the planarization layer includes silicon oxide.

[0020] According to any of the aforementioned embodiments of the first aspect of the present application, it also includes a filter layer, which is located on the side of the light conversion layer and the optical selection layer facing away from the substrate, and the filter layer includes a shading portion, a filter opening formed by the shading portion, and a filter unit located in the filter opening.

[0021] According to any of the aforementioned embodiments of the first aspect of the present application, the filter unit includes a red filter unit, a green filter unit and a blue filter unit.

[0022] According to any of the aforementioned embodiments of the first aspect of the present application, the light conversion portion includes a red light conversion portion and a green light conversion portion, the orthographic projection of the red light conversion portion on the substrate at least partially overlaps with the orthographic projection of the red filter unit on the substrate, and the orthographic projection of the green light conversion portion on the substrate at least partially overlaps with the orthographic projection of the green filter unit on the substrate.

[0023] According to any of the aforementioned embodiments of the first aspect of the present application, the light conversion layer further includes a light-transmitting portion, and an orthographic projection of the light-transmitting portion on the substrate at least partially overlaps with an orthographic projection of the blue filter unit on the substrate.

[0024] According to any of the aforementioned embodiments of the first aspect of the present application, the light-transmitting portion and the limiting portion are made of the same material.

[0025] According to any of the aforementioned embodiments of the first aspect of the present application, the optical selection layer is an inorganic material and includes a plurality of sub-layers stacked in sequence on the side of the light-emitting layer facing away from the substrate.

[0026] According to any of the aforementioned embodiments of the first aspect of the present application, the multiple sub-layers include a first sub-layer, a second sub-layer and a third sub-layer.

[0027] According to any of the aforementioned embodiments of the first aspect of the present application, the first sublayer includes titanium oxide.

[0028] According to any of the aforementioned embodiments of the first aspect of the present application, the second sublayer includes silicon oxide.

[0029] According to any of the aforementioned embodiments of the first aspect of the present application, the third sublayer includes titanium oxide.

[0030] According to any of the aforementioned embodiments of the first aspect of the present application, the first sublayer and the third sublayer are made of the same material.

[0031] An embodiment of a second aspect of the present application provides a display device, comprising the display panel as described above.

[0032] An embodiment of a third aspect of the present application provides a method for manufacturing a display panel, including:

[0033] Prepare a filter layer, the filter layer comprising a light shielding portion, a filter opening formed by the light shielding portion, and a filter unit located in the filter opening;

[0034] A limiting portion is prepared on one side of the filter layer, the limiting portion encloses a limiting opening, and the orthographic projection of the limiting opening on the filter layer falls within the filter unit;

[0035] An optical selection layer is deposited on a side of the defining portion away from the filter layer, wherein at least a portion of the optical selection layer covers the surface of the defining portion and a first side wall surface of the defining portion, and the defining portion includes a gap opening that is arranged through the display panel in a thickness direction;

[0036] Making a light conversion portion in the defined opening, the light conversion portion comprising a light conversion material;

[0037] A filling layer is prepared on a side of the optical selection layer close to the filter layer, wherein the filling layer comprises a body and a filling portion, and the filling portion is located at the gap opening;

[0038] According to any of the aforementioned embodiments of the third aspect of the present application, an optical selection layer is deposited on a side of the defining portion away from the filter layer, at least a portion of the optical selection layer covers the surface of the defining portion and the first side wall surface of the defining portion, and the defining portion includes a gap opening that is arranged through the display panel in a thickness direction, and further includes:

[0039] The gap opening includes a second side wall surface, and the optical selection layer covers the second side wall surface.

[0040] The fourth aspect of the present application provides an embodiment, including:

[0041] Prepare a light-emitting layer, the light-emitting layer includes a pixel defining portion and a pixel opening formed by the pixel defining portion, and a light-emitting unit is arranged in the pixel opening;

[0042] A defining portion is prepared on one side of the light-emitting layer, the defining portion encloses a defining opening, and the orthographic projection of the defining opening on the light-emitting layer falls within the light-emitting unit;

[0043] An optical selection layer is prepared on a side of the defining portion away from the light-emitting layer, wherein at least a portion of the optical selection layer covers the surface of the defining portion and a first side wall surface of the defining portion, and the defining portion includes a gap opening that is arranged through the display panel in a thickness direction;

[0044] Making a light conversion portion in the defined opening, the light conversion portion comprising a light conversion material;

[0045] A filling layer is formed on a side of the optical selection layer away from the light-emitting layer, the limiting portion further comprises a gap opening which is arranged through the thickness direction of the display panel, the filling layer comprises a body and a filling portion, and the filling portion is located at the gap opening;

[0046] According to any of the aforementioned embodiments of the fourth aspect of the present application, an optical selection layer is prepared on a side of the defining portion away from the light-emitting layer, at least a portion of the optical selection layer covers the surface of the defining portion and the first side wall surface of the defining portion, and the defining portion includes a gap opening extending through the display panel in a thickness direction, further comprising:

[0047] The limiting portion also includes a gap opening that is arranged through the display panel in a thickness direction, the gap opening includes a second side wall surface, and the optical selection layer covers the second side wall surface.

[0048] In the display panel provided in the embodiment of the present application, the display panel includes a substrate, a light-emitting layer, a light conversion layer and an optical selection layer. The light-emitting layer is located on one side of the substrate, and the light-emitting layer includes light-emitting units of multiple colors of light, and the light-emitting units are used to realize the light-emitting display function of the display panel. The light conversion layer is located on the side of the light-emitting layer away from the substrate, and the light conversion layer includes a limiting portion and a light conversion portion, and the limiting portion encloses a limiting opening in which the light conversion portion can be set, and the light conversion portion is set in at least one limiting opening. The light conversion portion includes a light conversion material and is used to convert the light emitted by the light-emitting unit into light of a specified color, and only one light conversion material is required to achieve color conversion. The optical selection layer covers at least part of the surface of the limiting portion, and the optical selection layer has different light transmittances for different wavelength bands. The optical selection layer can reflect the light with a higher reflectivity that has not been converted through the light conversion portion, and then cyclically convert it through the light conversion portion, thereby improving the color conversion efficiency of the display panel. In the embodiment of the present application, by covering at least part of the surface of the limiting portion with the optical selection layer, the light scattered by the light conversion portion is cyclically reflected between the light conversion layers, so as to improve the color conversion efficiency of the display panel, improve the purity of the color of the light, and thus improve the display effect of the display panel. BRIEF DESCRIPTION OF THE DRAWINGS

[0049] Other features, objects and advantages of the present application will become more apparent by reading the following detailed description of non-limiting embodiments with reference to the accompanying drawings, in which the same or similar reference numerals represent the same or similar features and the accompanying drawings are not drawn to scale.

[0050] Figure 1 is a top view of a display panel provided according to an embodiment of the present application;

[0051] Figure 2 yes Figure 1 One of the cross-sectional views at AA in the middle;

[0052] Figure 3 yes Figure 1 The second section view at AA in the middle;

[0053] Figure 4 is the transmittance of the optical selective layer to light of each wavelength band;

[0054] Figure 5 is a schematic diagram of scattered light distribution when light passes through the light conversion unit;

[0055] Figure 6 is a top view of a display panel provided according to another embodiment of the present application;

[0056] Figure 7 yes Figure 6 One of the cross-sectional views at AA in the middle;

[0057] Figure 8 yes Figure 6 The second section view at AA in the middle;

[0058] Fig. 9 Schematic diagram of the structure of the optical selection layer;

[0059] Fig.10 This is one of the schematic flow charts of a method for preparing a display panel provided according to another embodiment of the present application;

[0060] Fig.11 is one of the structural schematic diagrams of a display panel provided according to another embodiment of the present application;

[0061] Fig.12 is a second structural schematic diagram of a display panel provided according to another embodiment of the present application;

[0062] Fig.13 is a third structural schematic diagram of a display panel provided according to another embodiment of the present application;

[0063] Fig.14 This is a second schematic flow chart of a method for preparing a display panel provided according to another embodiment of the present application;

[0064] Fig.15 This is one of the schematic flow charts of a method for preparing a display panel provided according to yet another embodiment of the present application;

[0065] Fig.16 is one of the structural schematic diagrams of a display panel provided according to yet another embodiment of the present application;

[0066] Fig.17 is a second structural schematic diagram of a display panel provided according to yet another embodiment of the present application;

[0067] Fig.18 This is a third structural schematic diagram of a display panel provided according to yet another embodiment of the present application.

[0068] Description of reference numerals:

[0069] 10. Display panel;

[0070] 100. Substrate;

[0071] 200, light-emitting layer; 210, light-emitting unit; 220, blue light-emitting unit; 230, pixel defining portion; 240, pixel opening;

[0072] 300, light conversion layer; 310, limiting part; 311, first side wall surface; 312, second side wall surface; 313, gap opening; 314, filling layer; 314a, body; 314b, filling part; 315, gap; 320, limiting opening; 330, light conversion part; 331, red light conversion part; 332, green light conversion part; 350, light-transmitting part;

[0073] 400, optical selection layer; 410, top surface; 420, bottom surface; 430, first sublayer; 440, second sublayer; 450, third sublayer;

[0074] 500, planarization layer;

[0075] 600, filter layer; 610, filter unit; 611, red filter unit; 612, green filter unit; 613, blue filter unit; 614, light shielding portion; 620, filter opening;

[0076] 700. Encapsulation layer. DETAILED DESCRIPTION

[0077] 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 configured to explain the present application and are not configured 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.

[0078] 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 existence of other identical elements in the process, method, article or device including the elements.

[0079] 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.

[0080] In electronic devices such as mobile phones and tablet computers, it is necessary to integrate photosensitive components such as a front camera, an infrared light sensor, a proximity light sensor, etc. on one side of the display panel 10. In some embodiments, a light-transmitting display area can be provided on the above electronic device, and the photosensitive component can be provided on the back of the light-transmitting display area, so as to realize full-screen display of the electronic device while ensuring the normal operation of the photosensitive component.

[0081] As OLED display application scenarios expand, higher brightness, longer life, and wider color gamut have become the highlights of the promotion of major new products (mobile phones, tablets, and TVs). At present, the color purity and color reproducibility of Blue-OLED+QD technology are significantly superior to other products.

[0082] Although it has huge advantages in color reproducibility, the low efficiency / lifespan of blue fluorescent materials and the low color conversion efficiency of quantum dot materials restrict the rapid commercialization of Blue-OLED+QD technology.

[0083] To solve the above problems, the embodiments of the present application provide a display panel 10, a display device, and a method for manufacturing the display panel 10, which increases the color conversion efficiency and improves the color purity of the display panel 10 through structural design. The following will describe various embodiments of the display panel 10 and the display device in conjunction with the accompanying drawings.

[0084] An embodiment of the present application provides a display panel 10 , which may be an organic light emitting diode (OLED) display panel 10 .

[0085] See also Figure 1 to Figure 2 , Figure 1 is a top view of a display panel 10 provided according to an embodiment of the present application, Figure 2 yes Figure 1 One of the cross-sectional views at AA in the middle, Figure 3 yes Figure 1 The second cross-sectional view at AA in the middle.

[0086] like Figures 1 to 3As shown, the display panel 10 provided by the embodiment of the first aspect of the present application includes a substrate 100, a light-emitting layer 200, a light conversion layer 300 and an optical selection layer 400. The light-emitting layer 200 is located on one side of the substrate 100 and includes a plurality of light-emitting units 210. The light conversion layer 300 is located on the side of the light-emitting layer 200 away from the substrate 100. The light conversion layer 300 includes a defining portion 310 and a light conversion portion 330. The defining portion 310 encloses a defining opening 320. A light conversion portion 330 is disposed in at least one defining opening 320. The light conversion portion 330 includes a light conversion material and is used to convert the emitted light of the light-emitting unit 210 into light of a specified color. The optical selection layer 400 covers at least a portion of the surface of the defining portion 310.

[0087] In the display panel 10 provided in the embodiment of the present application, the display panel 10 includes a substrate 100, a light-emitting layer 200, a light-conversion layer 300, and an optical selection layer 400. The light-emitting layer 200 is located on one side of the substrate 100, and the light-emitting layer 200 includes a plurality of light-emitting units 210, and the light-emitting units 210 are used to realize the light-emitting display function of the display panel 10. The light-conversion layer 300 is located on the side of the light-emitting layer 200 away from the substrate 100, and the light-conversion layer 300 includes a limiting portion 310 and a light-conversion portion 330, and the limiting portion 310 encloses a limiting opening 320 in which the light-conversion portion 330 can be set, and the light-conversion portion 330 is set in at least one limiting opening 320. The light-conversion portion 330 includes a light-conversion material and is used to convert the light emitted by the light-emitting unit 210 into light of a specified color, and color conversion can be realized with only one light-conversion material. The optical selection layer 400 covers at least part of the surface of the limiting portion 310, and the optical selection layer 400 has different reflectivity for light in different wavelength bands. The optical selection layer 400 can reflect the light with a high reflectivity that has not been converted after passing through the light conversion unit 330, and then cyclically convert it after passing through the light conversion unit 330, thereby improving the color conversion efficiency of the display panel 10. In the embodiment of the present application, the optical selection layer 400 covers at least part of the surface of the limiting unit 310, so that the light scattered by the light conversion unit 330 is cyclically reflected between the light conversion layers 300, so as to improve the color conversion efficiency of the display panel 10, improve the purity of the light color, and thus improve the display effect of the display panel 10.

[0088] Optionally, the light emitting unit 210 may have multiple light emitting colors, or may be a light emitting unit 210 of one color, and the light emitted by the light emitting unit 210 may be converted into light of other colors by the light conversion unit 330 to realize the color display of the display panel 10. For example, the light emitting unit 210 may be a red light emitting unit for emitting red light, a green light emitting unit for emitting green light, or a blue light emitting unit for emitting blue light. In the embodiment of the present application, the light emitting units 210 are all blue light emitting units for illustration. Optionally, the light conversion unit 330 is used to convert the blue light emitted by the blue light emitting unit 220 into red light or green light.

[0089] In some optional embodiments, the reflectivity of the optical selection layer 400 to the blue light band is A, the reflectivity of the optical selection layer 400 to red light is B, and the reflectivity of the optical selection layer 400 to green light is C, wherein A>B and A>C.

[0090] In these optional embodiments, optionally, the emitted light of the light emitting unit 210 is blue light. Figure 4 and Figure 5 As shown, Figure 4 is the transmittance of the optical selective layer 400 to light of each wavelength band, Figure 4 It can be seen that the optical selection layer 400 has a lower transmittance to blue light, that is, a higher reflectance to blue light. The optical selection layer 400 has a higher transmittance to red light and green light, and a lower reflectance. Therefore, the optical selection layer 400 can reflect the unconverted blue light in the light conversion unit 330, and perform cyclic conversion in the light conversion layer 300, thereby improving the color conversion efficiency of the display panel 10.

[0091] In some optional embodiments, the defining portion 310 includes a first side wall surface 311 facing the defining opening 320 , and the optical selection layer 400 covers the first side wall surface 311 .

[0092] In these optional embodiments, Figure 5 As shown, Figure 5 Schematic diagram of scattered light distribution after light passes through the light conversion unit 330. After the light emitted by the blue light emitting unit 220 passes through the light conversion unit 330, light is emitted in all directions, for example, including unconverted blue light and converted red light and green light. Since the optical selection layer 400 has a higher reflectivity for blue light and a lower reflectivity for red light and green light, the optical selection layer 400 covers the first side wall surface 311 and can reflect the unconverted blue light laterally, and then pass through the light conversion unit 330 for cyclic conversion, thereby improving the color conversion efficiency of the display panel 10.

[0093] In some optional embodiments, the optical selection layer 400 includes a top surface 410 disposed away from the substrate 100 and a bottom surface 420 disposed toward the substrate 100 , and the optical selection layer 400 covers the top surface 410 of the defining portion 310 .

[0094] In these optional embodiments, Figure 2 As shown, the optical selection layer 400 can cover the top surface 410 of the defining portion 310 , and can reflect the unconverted blue light from the top surface 410 back to the light conversion portion 330 , thereby performing cyclic conversion and improving the color conversion efficiency of the display panel 10 .

[0095] Optional, such as Figure 3As shown, the optical selection layer 400 may also cover the bottom surface 420 of the limiting portion 310 , and may reflect the unconverted blue light from the bottom surface 420 back to the light conversion portion 330 , thereby performing cyclic conversion and improving the color conversion efficiency of the display panel 10 .

[0096] Optionally, the optical selection layer 400 may cover both the top surface 410 and the bottom surface 420 of the defining portion 310 , and may circularly reflect the unconverted blue light between the bottom surface 420 and the top surface 410 , thereby performing color conversion and improving the color conversion efficiency of the display panel 10 .

[0097] Optionally, there is no limitation on whether the optical selection layer 400 covers the top surface 410 or the top surface 410 , and the specific position of the optical selection layer 400 is determined according to the manufacturing process.

[0098] Optional, such as Figure 6 and Figure 7 As shown, the defining portion 310 includes a gap opening 313 that is arranged through the thickness direction of the display panel 10, and the defining portion 310 includes a second side wall surface 312 facing the gap opening 313, and the optical selection layer 400 covers the second side wall surface 312. The gap opening 313 is provided so that the optical selection layer 400 covers the second side wall surface 312, so that multiple layers of the optical selection layer 400 are added between adjacent light conversion portions 330, further improving the color conversion efficiency of blue light.

[0099] Optionally, a filling portion 314 b may be provided in the gap opening 313 , so as to make the structure of the optical selection layer 400 more compact.

[0100] Optionally, the display panel 10 also includes a filling layer 314, the filling layer 314 includes a main body 314a and a filling part 314b, the main body 314a is located between the light-emitting layer 200 and the light conversion layer 300, and optionally, the filling layer 314 is sticky, and the filling layer 314 is used to bond the optical selection layer 400, which can effectively increase the adhesion between the optical selection layer 400 and the underlying film layer, while enhancing the packaging reliability.

[0101] Optionally, the display panel 10 further includes an encapsulation layer 700, which is located between the light-emitting layer 200 and the filling layer 314 to improve the problem of water and oxygen intrusion into the light-emitting layer 200 and increase the service life of the light-emitting layer 200. Optionally, the encapsulation layer 700 is located between the light-emitting layer 200 and the light conversion layer 300 to facilitate the manufacture of the light conversion layer 300.

[0102] Optionally, the filling layer 314 may be located between the optical selection layer 400 and the encapsulation layer 700 , which may effectively increase the adhesion between the optical selection layer 400 and the encapsulation layer 700 and enhance the encapsulation reliability.

[0103] Optionally, the encapsulation layer 700 includes a first encapsulation layer, a second encapsulation layer and a third encapsulation layer which are sequentially arranged on a side away from the substrate 100 , so as to encapsulate the display panel 10 and ensure the effectiveness of the encapsulation.

[0104] Optionally, the first encapsulation layer is an inorganic encapsulation layer, and the inorganic encapsulation layer can be prepared by chemical vapor deposition, which can improve the compactness of the first encapsulation layer, thereby improving the encapsulation effect of the encapsulation layer.

[0105] Optionally, the encapsulation layer 700 further includes a second encapsulation layer located on the side of the first encapsulation layer away from the substrate 100, and the material of the second encapsulation layer includes an organic material. That is, the second encapsulation layer is an organic encapsulation layer, and the organic encapsulation layer can be prepared by inkjet printing, so that the encapsulation layer 700 has a suitable thickness.

[0106] Optionally, the encapsulation layer 700 may further include a third encapsulation layer located on the side of the second encapsulation layer away from the substrate 100, and the material of the third encapsulation layer includes an inorganic material. That is, the third encapsulation layer is an inorganic encapsulation layer, and further adding an inorganic encapsulation layer outside the organic encapsulation layer can further improve the encapsulation effect of the encapsulation layer 700.

[0107] Optionally, the material of the first encapsulation layer is the same as the material of the third encapsulation layer, so that the first encapsulation layer and the third encapsulation layer can be prepared using the same equipment, which can simplify the preparation process of the display panel 10 .

[0108] In some other optional embodiments, Figure 8 As shown, the body 314a may also be located on the side of the light conversion layer 300 away from the substrate 100, which can effectively increase the adhesion between the optical selection layer 400 and the upper film layer, while enhancing the packaging reliability.

[0109] Optionally, the position of the main body 314a is not limited, and the specific setting method depends on the manufacturing process.

[0110] In some optional embodiments, such as Figure 7 and Figure 8 As shown, the display panel 10 further includes a planarization layer 500 , which is located on a side of the optical selection layer 400 and the light conversion layer facing away from the substrate 100 .

[0111] In these optional embodiments, Figure 2 and Figure 7 As shown, when the optical selection layer 400 is located on the top surface 410 of the light conversion portion 330, the planarization layer 500 is located on the side of the optical selection layer 400 facing away from the substrate 100. Figure 3 and Figure 8As shown, when the optical selection layer 400 is located on the bottom surface 420 of the light conversion part 330, the planarization layer 500 is located on the side of the light conversion layer 300 away from the substrate 100. The planarization layer 500 is used to make the optical selection layer 400 and the side of the light conversion layer away from the substrate 100 flat, so that the display panel 10 has a suitable thickness.

[0112] Optionally, the filling layer 314 may be used to bond the optical selection layer 400 and the planarization layer 500 , which may effectively increase the adhesion between the optical selection layer 400 and the planarization layer 500 and enhance the packaging reliability.

[0113] In some optional embodiments, the orthographic projection of the opening 320 on the substrate 100 is defined to at least partially overlap with the orthographic projection of the light emitting unit 210 on the substrate 100. In these optional embodiments, the opening 320 is defined to correspond to the light emitting unit 210 so that the orthographic projection of the light conversion unit 330 on the substrate 100 is at least partially overlapped with the orthographic projection of the light emitting unit 210 on the substrate 100, so that more light emitted by the light emitting unit 210 can be incident on the light conversion unit 330, thereby improving the brightness of the display panel 10.

[0114] Optionally, the orthographic projection of the light-emitting unit 210 on the substrate 100 is located within the orthographic projection of the limiting opening 320 on the substrate 100, so that the light emitted from the light-emitting unit 210 from the front in the thickness direction of the display panel 10 is not blocked by the limiting portion 310, and can be more incident on the light conversion portion 330, thereby improving the brightness of the display panel 10.

[0115] In some optional embodiments, such as Figure 7 As shown, the display panel 10 also includes a filter layer 600, which is located on the side of the light conversion layer 300 and the optical selection layer 400 away from the substrate 100. The filter layer 600 includes a shading portion 614, a filter opening 620 formed by the shading portion 614, and a filter unit 610 located in the filter opening 620.

[0116] In these optional embodiments, the filter unit 610 can filter the light emitted from the light conversion layer 300, filter out the light with a color different from that of the filter unit 610, and refract and reflect the light incident into the filter unit 610, which helps to improve the contrast of the display panel 10.

[0117] Optionally, the filter unit 610 includes a red filter unit 611, a green filter unit 612 and a blue filter unit 613. The red filter unit 611 is used to filter out light of different colors except red, the green filter unit 612 is used to filter out light of different colors except green, and the blue filter unit 613 is used to filter out light of different colors except blue.

[0118] Optionally, the light conversion unit 330 includes a red light conversion unit 331 and a green light conversion unit 332, wherein the orthographic projection of the red light conversion unit 331 on the substrate 100 at least partially overlaps with the orthographic projection of the red light filter unit 611 on the substrate 100, and the orthographic projection of the green light conversion unit 332 on the substrate 100 at least partially overlaps with the orthographic projection of the green light filter unit 612 on the substrate 100. The light emitted by the corresponding light conversion unit 330 is filtered by the corresponding light filter unit 610 before being emitted, which helps to ensure the purity of the light emitted by the display panel 10.

[0119] Optionally, the light conversion layer 300 also includes a light-transmitting portion 350, the orthographic projection of the light-transmitting portion 350 on the substrate 100 at least partially overlaps with the orthographic projection of the blue filter unit 613 on the substrate 100, and the light-transmitting portion 350 is not provided with an optical selection layer 400 along the thickness direction of the display panel 10, so that the light of the blue light-emitting unit 220 can be directly emitted from the light-transmitting portion 350, which can enhance the light output brightness of the blue light-emitting unit 220.

[0120] Optionally, the transparent portion 350 and the limiting portion 310 are made of the same material, and the limiting portion 310 is also made of a transparent material, so that light can be reflected between the light conversion layers 300. At the same time, the transparent portion 350 and the limiting portion 310 can be prepared in the same process step, reducing the process steps.

[0121] Optionally, a gap 315 is further provided between the light-transmitting portion 250 and the light-converting portion 330 , and the filling portion 314 b may be located in the gap 315 to ensure the compactness of the structure of the light-converting layer 300 .

[0122] In some optional embodiments, the optical selection layer 400 is an inorganic material and includes a plurality of sub-layers stacked in sequence on the side of the light-emitting layer 200 facing away from the substrate 100 .

[0123] In these optional embodiments, the optical selection layer 400 is a multi-layer inorganic thin film structure. The inorganic material can reduce etching residues generated when coating the light conversion material and enhance the packaging effect of the display panel 10 .

[0124] Optional, such as Fig. 9 As shown, the multiple sub-layers include a first sub-layer 430, a second sub-layer 440 and a third sub-layer 450, which can further enhance the packaging effect and improve the problem of etching residues.

[0125] Optionally, the first sublayer 430 includes titanium oxide. Optionally, the second sublayer 440 includes silicon oxide. Optionally, the third sublayer 450 includes titanium oxide. Wherein, the first sublayer 430 and the third sublayer are both titanium oxide, which has a higher reflectivity for blue light and a lower reflectivity for red light and green light. Silicon oxide has a higher reflectivity for light and can better reflect blue light.

[0126] Optionally, the first sublayer 430 and the third sublayer 450 are made of the same material, so that the first sublayer 430 and the third sublayer 450 can be prepared using the same equipment, which can simplify the preparation process of the display panel 10 .

[0127] An embodiment of a second aspect of the present application provides a display device, which includes a display panel 10 according to any one of the above embodiments.

[0128] In the display device provided in the embodiment of the present application, the display device includes a display panel 10, and the display panel 10 includes a substrate 100, a light-emitting layer 200, a light-conversion layer 300, and an optical selection layer 400. The light-emitting layer 200 is located on one side of the substrate 100, and the light-emitting layer 200 includes a plurality of light-emitting units 210, and the light-emitting units 210 are used to realize the light-emitting display function of the display panel 10. The light-conversion layer 300 is located on the side of the light-emitting layer 200 away from the substrate 100, and the light-conversion layer 300 includes a limiting portion 310 and a light-conversion portion 330, and the limiting portion 310 encloses a limiting opening 320 in which the light-conversion portion 330 can be set, and the light-conversion portion 330 is set in at least one limiting opening 320. The light-conversion portion 330 includes a light-conversion material and is used to convert the light emitted by the light-emitting unit 210 into light of a specified color, and only one light-conversion material is needed to realize color conversion. The optical selection layer 400 covers at least part of the surface of the limiting portion 310, and the optical selection layer 400 has different reflectivity for light in different wavelength bands. The optical selection layer 400 can laterally reflect the light with a high reflectivity that has not been converted through the light conversion unit 330, and then cyclically convert it through the light conversion unit 330, thereby improving the color conversion efficiency of the display panel 10. In the embodiment of the present application, the optical selection layer 400 covers at least a portion of the surface of the limiting unit 310, so that the light scattered laterally by the light conversion unit 330 is cyclically reflected between the light conversion layers 300, so as to improve the color conversion efficiency of the display panel 10, improve the purity of the light color, and thus improve the display effect of the display panel 10.

[0129] The display device in the embodiments of the present application includes but is not limited to mobile phones, personal digital assistants (PDAs), tablet computers, e-books, televisions, access control systems, smart landline phones, consoles, and other devices with display functions.

[0130] The third aspect of the present application provides a method for preparing a display panel 10, such as Fig.10 As shown, the preparation method comprises:

[0131] Step S110 : preparing a filter layer 600 , the filter layer 600 comprising a light shielding portion 614 , a filter opening 620 enclosed by the light shielding portion 614 , and a filter unit 610 located in the filter opening 620 .

[0132] Step S120: Fig.11 As shown, a defining portion 310 is prepared on one side of the filter layer 600 , and the defining portion 310 encloses a defining opening 320 , and the orthographic projection of the defining opening 320 on the filter layer 600 falls within the filter unit 610 .

[0133] Step S130: Fig.12 As shown, an optical selection layer 400 is deposited on the side of the defining portion 310 facing away from the filter layer 600, and at least a portion of the optical selection layer 400 covers the surface of the defining portion 310 and the first side wall surface 311 of the defining portion 310. The defining portion 310 includes a gap opening 313 that is arranged through the thickness direction of the display panel 10.

[0134] Step S140: Fig.13 As shown, the light conversion portion 330 and the light-transmitting portion 350 are manufactured in the defined opening 320 , and the light conversion portion 330 includes a light conversion material.

[0135] Step S150: Figure 7 As shown, a filling layer 314 is prepared on one side of the optical selection layer 400 close to the filter layer 600 . The filling layer 314 includes a main body 314 a and a filling portion 314 b . The filling portion 314 b is located at the gap opening 313 .

[0136] In a method for preparing a display panel 10 provided in an embodiment of the present application, a filter layer 600 is prepared in step S110, a defining portion 310 and a defining opening 320 are formed in step S120, and an optical selection layer 400 covering the surface of the defining portion 310 and the first side wall surface 311 is prepared in step S130. A light conversion portion 330 is made in step S140, and finally a filling layer 314 filling the gap opening 313 is prepared in step S150. The display panel 10 prepared by the embodiment of the present application covers at least part of the surface of the defining portion 310 with the optical selection layer 400, so that the light scattered laterally by the light conversion portion 330 is circularly reflected between the light conversion layers 300, so as to improve the color conversion efficiency of the display panel 10, improve the purity of the light color, and thus improve the display effect of the display panel 10.

[0137] Optionally, in step S130, if Fig.14 As shown, the method further includes step S131: the gap opening 313 includes a second side wall surface 312, and the optical selection layer 400 covers the second side wall surface 312. By providing the second side wall surface 312, multiple layers of optical selection layers 400 are added between adjacent light conversion parts 330, thereby further improving the color conversion efficiency of blue light.

[0138] The fourth aspect of the present application provides a method for preparing a display panel 10, such as Fig.15 As shown, the preparation method comprises:

[0139] Step S110 ′: preparing the light-emitting layer 200 , wherein the light-emitting layer 200 comprises a pixel defining portion 310 and a pixel opening 240 surrounded by the pixel defining portion 310 , wherein the light-emitting unit 210 is disposed in the pixel opening 240 .

[0140] Step S120': Fig.16 As shown, a defining portion 310 is prepared on one side of the light-emitting layer 200 , and the defining portion 310 encloses a defining opening 320 , and the orthographic projection of the defining opening 320 on the light-emitting layer 200 falls within the light-emitting unit 210 .

[0141] Step S130': Fig.17 As shown, an optical selection layer 400 is prepared on the side of the defining portion 310 facing away from the light-emitting layer 200, and at least a portion of the optical selection layer 400 covers the surface of the defining portion 310 and the first side wall surface 311 of the defining portion 310. The defining portion 310 includes a gap opening 313 that is arranged through the display panel 10 in the thickness direction.

[0142] Step S140': Fig.18 As shown, the light conversion portion 330 and the light-transmitting portion 350 are manufactured in the defined opening 320 , and the light conversion portion 330 includes a light conversion material.

[0143] Step S150': Figure 8 As shown, a filling layer 314 is prepared on one side of the optical selection layer 400 close to the filter layer 600 . The filling layer 314 includes a main body 314 a and a filling portion 314 b . The filling portion 314 b is located at the gap opening 313 .

[0144] In a method for preparing a display panel 10 provided in an embodiment of the present application, a light-emitting layer 200 is prepared in step S110', a defining portion 310 and a defining opening 320 are formed in step S120', and an optical selection layer 400 covering the surface of the defining portion 310 and the first side wall surface 311 is prepared in step S130'. A light conversion portion 330 is made in step S140', and finally a filling layer 314 filling the gap opening 313 is prepared in step S150'. The display panel 10 prepared by the embodiment of the present application covers at least part of the surface of the defining portion 310 with the optical selection layer 400, so that the light scattered laterally by the light conversion portion 330 is circularly reflected between the light conversion layers 300, so as to improve the color conversion efficiency of the display panel 10, enhance the purity of the light color, and thus improve the display effect of the display panel 10.

[0145] Optionally, in step S130', the limiting portion 310 further includes a gap opening 313 that is arranged through the display panel 10 in the thickness direction, the gap opening 313 includes a second side wall surface 312, and the optical selection layer 400 covers the second side wall surface 312. By providing the second side wall surface 312, multiple layers of the optical selection layer 400 are added between adjacent light conversion portions 330, thereby further improving the color conversion efficiency of blue light.

[0146] According to the embodiments of the present application as above, these embodiments do not describe all the details in detail, nor do they limit the invention to specific embodiments. Obviously, many modifications and changes can be made based on the above description. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present application, so that those skilled in the art can make good use of the present application and the modifications based on the present application. The present application is only limited by the claims and their full scope and equivalents.

Claims

1. A display panel, characterized in that: The display panel comprises: substrate; A light-emitting layer, located on one side of the substrate, comprising a plurality of light-emitting units; a light conversion layer, located on a side of the light-emitting layer away from the substrate, the light conversion layer comprising a defining portion and a light conversion portion, the defining portions enclosing a defining opening, the light conversion portion being disposed in at least one of the defining openings, the light conversion portion comprising a light conversion material and used to convert the emitted light of the light-emitting unit into light of a specified color; An optical selection layer covers at least a portion of a surface of the defined portion.

2. The display panel according to claim 1, characterized in that: The reflectivity of the optical selection layer to blue light is A, the reflectivity of the optical selection layer to red light is B, and the reflectivity of the optical selection layer to green light is C, wherein A>B and A>C; Preferably, the emitted light of the light emitting unit is blue light.

3. The display panel according to claim 1, characterized in that: The defining portion comprises a first side wall surface facing the defining opening, and the optical selection layer covers the first side wall surface; Preferably, the optical selection layer comprises a top surface disposed away from the substrate and a bottom surface disposed toward the substrate, and the optical selection layer covers the top surface and / or the bottom surface of the defining portion; Preferably, the defining portion includes a gap opening provided through the display panel in a thickness direction, the defining portion includes a second side wall surface facing the gap opening, and the optical selection layer covers the second side wall surface; Preferably, a filling portion is provided in the gap opening; Preferably, it further comprises a filling layer, wherein the filling layer comprises a body and the filling portion, wherein the body is located between the light-emitting layer and the light conversion layer, or the body is located on a side of the light conversion layer away from the substrate; Preferably, the filling layer is sticky, and the filling layer is used to bond the optical selection layer; Preferably, it further comprises an encapsulation layer, wherein the encapsulation layer is located between the light-emitting layer and the filling layer; Preferably, the encapsulation layer is located between the light-emitting layer and the light conversion layer.

4. The display panel according to claim 1, characterized in that: The orthographic projection of the defined opening on the substrate at least partially overlaps with the orthographic projection of the light emitting unit on the substrate; Preferably, the projection of the light emitting unit is located within the projection of the defined opening.

5. The display panel according to claim 1, characterized in that: Also includes: The planarization layer is located on a side of the optical selection layer or the light conversion layer facing away from the substrate, and the material of the planarization layer includes silicon oxide.

6. The display panel according to claim 1, characterized in that: It also includes a filter layer, which is located on a side of the light conversion layer and the optical selection layer away from the substrate, and includes a light shielding portion, a filter opening formed by the light shielding portion, and a filter unit located in the filter opening; Preferably, the filter unit includes a red filter unit, a green filter unit and a blue filter unit; Preferably, the light conversion portion comprises a red light conversion portion and a green light conversion portion, the orthographic projection of the red light conversion portion on the substrate at least partially overlaps with the orthographic projection of the red light filter unit on the substrate, and the orthographic projection of the green light conversion portion on the substrate at least partially overlaps with the orthographic projection of the green light filter unit on the substrate; Preferably, the light conversion layer further comprises a light-transmitting portion, and an orthographic projection of the light-transmitting portion on the substrate at least partially overlaps with an orthographic projection of the blue filter unit on the substrate; Preferably, the light-transmitting portion and the limiting portion are made of the same material.

7. The display panel according to claim 1, characterized in that: The optical selection layer is an inorganic material and includes a plurality of sub-layers stacked in sequence on the side of the light-emitting layer facing away from the substrate; Preferably, the plurality of sublayers include a first sublayer, a second sublayer and a third sublayer; Preferably, the first sublayer comprises titanium oxide; Preferably, the second sublayer comprises silicon oxide; Preferably, the third sublayer comprises titanium oxide; Preferably, the first sub-layer and the third sub-layer are made of the same material.

8. A display device, characterized in that: A display panel comprising any one of claims 1 to 7.

9. A method for manufacturing a display panel, characterized in that: include: Prepare a filter layer, the filter layer comprising a light shielding portion, a filter opening formed by the light shielding portion, and a filter opening located in the filter opening. A limiting portion is prepared on one side of the filter layer, the limiting portion encloses a limiting opening, and the orthographic projection of the limiting opening on the filter layer falls within the filter unit; An optical selection layer is deposited on a side of the defining portion away from the filter layer, wherein at least a portion of the optical selection layer covers a surface of the defining portion and a first side wall surface of the defining portion, and the defining portion includes a gap opening that is arranged through the display panel in a thickness direction; making a light conversion portion in the defined opening, wherein the light conversion portion includes a light conversion material; A filling layer is prepared on a side of the optical selection layer close to the filter layer, wherein the filling layer comprises a body and a filling portion, and the filling portion is located at the gap opening; Preferably, an optical selection layer is deposited on a side of the defining portion away from the filter layer, at least a portion of the optical selection layer covers a surface of the defining portion and a first side wall surface of the defining portion, the defining portion includes a gap opening extending through the display panel in a thickness direction, and further includes: The gap opening includes a second side wall surface, and the optical selection layer covers the second side wall surface.

10. A method for manufacturing a display panel, characterized in that: include: Prepare a light-emitting layer, wherein the light-emitting layer includes a pixel defining portion and a pixel opening formed by the pixel defining portion, and a light-emitting unit is disposed in the pixel opening; A defining portion is prepared on one side of the light-emitting layer, the defining portion encloses a defining opening, and the orthographic projection of the defining opening on the light-emitting layer falls within the light-emitting unit; An optical selection layer is prepared on a side of the defined portion away from the light-emitting layer, wherein at least a portion of the optical selection layer covers a surface of the defined portion and a first side wall surface of the defined portion, and the defined portion includes a gap opening that is arranged through the display panel in a thickness direction; making a light conversion portion in the defined opening, wherein the light conversion portion includes a light conversion material; A filling layer is formed on a side of the optical selection layer away from the light-emitting layer, the limiting portion further comprises a gap opening which is arranged through the display panel in a thickness direction, the filling layer comprises a body and a filling portion, and the filling portion is located at the gap opening; Preferably, the step of preparing an optical selection layer on a side of the defined portion away from the light-emitting layer, at least a portion of the optical selection layer covers the surface of the defined portion and the first side wall surface of the defined portion, and the defined portion includes a gap opening extending through the display panel in the thickness direction, further comprising: The limiting portion further includes a gap opening provided through the display panel in a thickness direction, the gap opening includes a second side wall surface, and the optical selection layer covers the second side wall surface.

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