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 filter layer, an isolation structure and a light emitting layer. The filter layer and the light-emitting layer are arranged on the two sides of the substrate respectively to form the display panel of a bottom light-emitting structure. The light emitted by the light emitting units is the same as the corresponding light filtering parts in color under the filtering action of the light filtering parts, and therefore color display of the display panel is achieved. The isolation structure is arranged on the substrate and forms the plurality of isolation openings in a surrounding manner, so that the light-emitting layer is separated to form the light-emitting units which are mutually disconnected, crosstalk of carriers in the light-emitting layer can be reduced, and the use performance of the display panel is improved.

Description

Technical Field

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

[0002] Organic Light Emitting Diode (OLED) and flat panel display devices based on technologies such as Light Emitting Diode (LED) have been widely used in various consumer electronic products such as mobile phones, televisions, laptops, desktop computers, etc. due to their advantages such as high image quality, power saving, thin body and wide application range, becoming the mainstream in display devices.

[0003] However, the performance of current OLED display products needs to be improved. 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 performance of the display panel.

[0005] A first aspect of the present application provides a display panel, comprising: a substrate; a filter layer, located on the substrate, comprising a plurality of filter portions distributed at intervals; an isolation structure, located on a side of the substrate away from the filter layer and enclosing a plurality of isolation openings; a light-emitting layer, located on a side of the substrate away from the filter layer, the light-emitting layer comprising light-emitting units located in the isolation openings, and an orthographic projection of each light-emitting unit on the substrate at least partially overlaps with an orthographic projection of each filter portion on the substrate.

[0006] According to an implementation scheme of the first aspect of the present application, the light-emitting unit is a white light-emitting unit, the light-emitting unit includes a first light-emitting unit, a second light-emitting unit and a third light-emitting unit that are spaced apart, and the filter portion includes a first filter portion, a second filter portion and a third filter portion of different colors; the orthographic projection of the first light-emitting unit on the substrate at least partially overlaps with the orthographic projection of the first filter portion on the substrate, the orthographic projection of the second light-emitting unit on the substrate at least partially overlaps with the orthographic projection of the second filter portion on the substrate, and the orthographic projection of the third light-emitting unit on the substrate at least partially overlaps with the orthographic projection of the third filter portion on the substrate.

[0007] According to any of the aforementioned implementations of the first aspect of the present application, a black matrix is ​​disposed between adjacent filter portions.

[0008] According to any of the foregoing embodiments of the first aspect of the present application, the light-emitting unit also includes a fourth light-emitting unit, and the first light-emitting unit, the second light-emitting unit and the third light-emitting unit are arranged around the fourth light-emitting unit, and the first light-emitting unit, the second light-emitting unit, the third light-emitting unit and the fourth light-emitting unit are respectively located in each isolation opening; or, the first light-emitting unit, the second light-emitting unit and the third light-emitting unit are arranged around the fourth light-emitting unit, and the first light-emitting unit, the second light-emitting unit, the third light-emitting unit and the fourth light-emitting unit are located in the same isolation opening.

[0009] According to any of the aforementioned embodiments of the first aspect of the present application, the filter portion further includes a transparent filter portion, and the orthographic projection of the fourth light-emitting unit on the substrate at least partially overlaps with the orthographic projection of the transparent filter portion on the substrate.

[0010] According to any of the aforementioned embodiments of the first aspect of the present application, the first light-emitting unit, the second light-emitting unit and the third light-emitting unit are arranged around the fourth light-emitting unit; or, the first light-emitting unit, the second light-emitting unit, the third light-emitting unit and the fourth light-emitting unit are arranged in an array.

[0011] According to any of the aforementioned embodiments of the first aspect of the present application, the isolation structure includes a first conductive layer, and the display panel also includes: a first electrode layer, located on the side of the light-emitting layer away from the substrate, the first electrode layer includes a first electrode located in the isolation opening, and the first electrode is electrically connected to the first conductive layer.

[0012] According to any of the aforementioned embodiments of the first aspect of the present application, the display panel also includes a signal line layer, the signal line layer includes a power supply voltage line, the isolation structure has a main body and a frame arranged around the main body, the pixel openings are all located in the frame, and the frame is electrically connected to the power supply voltage line through a first conductive layer.

[0013] According to any of the aforementioned embodiments of the first aspect of the present application, the thickness of the first conductive layer in the thickness direction of the display panel is 0.5 μm to 2 μm.

[0014] According to any of the aforementioned embodiments of the first aspect of the present application, the orthographic projection of each light-emitting unit on the substrate is located within the orthographic projection of each first electrode on the substrate.

[0015] According to any of the aforementioned embodiments of the first aspect of the present application, the light-emitting unit is spaced apart from the first conductive layer.

[0016] According to any of the aforementioned embodiments of the first aspect of the present application, the isolation structure further includes a second layer located on the side of the first conductive layer facing away from the substrate, and the orthographic projection of the first conductive layer on the substrate is located within the orthographic projection of the second layer on the substrate.

[0017] According to any of the aforementioned embodiments of the first aspect of the present application, the second layer includes a conductive material or an insulating material.

[0018] According to any of the aforementioned embodiments of the first aspect of the present application, the second layer includes a metal material, and the first conductive layer and the second layer are made of different materials.

[0019] According to any of the aforementioned embodiments of the first aspect of the present application, the isolation structure further includes a third layer located on the side of the first conductive layer facing the substrate, and the orthographic projection of the first conductive layer on the substrate is located within the orthographic projection of the third layer on the substrate.

[0020] According to any of the aforementioned embodiments of the first aspect of the present application, the display panel further includes: a pixel definition layer located on the substrate, the pixel definition layer including a pixel defining portion and a pixel opening formed by the pixel defining portion.

[0021] According to any of the aforementioned implementations of the first aspect of the present application, the isolation structure is located on a side of the pixel defining portion facing away from the substrate.

[0022] According to any of the aforementioned implementations of the first aspect of the present application, a clearance opening is opened on the pixel defining portion, and the isolation structure is located in the clearance opening.

[0023] According to any of the aforementioned implementations of the first aspect of the present application, the display panel further includes a pixel electrode, and the pixel electrode is exposed by the pixel opening.

[0024] According to any of the aforementioned embodiments of the first aspect of the present application, the pixel electrode includes a transparent conductive material.

[0025] According to any of the aforementioned embodiments of the first aspect of the present application, the display panel further includes: an encapsulation layer located on a side of the first electrode layer away from the substrate

[0026] According to any of the aforementioned embodiments of the first aspect of the present application, the encapsulation layer includes: a first sublayer, located on a side of the light-emitting layer facing away from the substrate.

[0027] According to any of the aforementioned embodiments of the first aspect of the present application, the first sublayer includes an inorganic material.

[0028] According to any of the aforementioned embodiments of the first aspect of the present application, the encapsulation layer further includes a second sublayer, and the second sublayer is located on a side of the first sublayer facing away from the substrate.

[0029] According to any of the aforementioned embodiments of the first aspect of the present application, the second sublayer includes an organic material.

[0030] According to any of the aforementioned embodiments of the first aspect of the present application, the encapsulation layer further includes a third sublayer, and the third sublayer is located on a side of the second sublayer facing away from the substrate.

[0031] According to any of the aforementioned embodiments of the first aspect of the present application, the third sublayer includes an inorganic material.

[0032] An embodiment of a second aspect of the present application provides a display device, which includes a display panel according to any of the above embodiments.

[0033] An embodiment of a third aspect of the present application provides a method for preparing a display panel, including:

[0034] Prepare a filter layer, the filter layer comprising a plurality of filter parts distributed at intervals;

[0035] preparing a substrate on the filter layer;

[0036] An isolation structure is prepared on a side of the substrate facing away from the filter layer, wherein the isolation structure encloses a plurality of isolation openings;

[0037] A luminescent layer is prepared on the side of the substrate away from the filter layer. The luminescent layer includes luminescent units located in the isolation openings. The orthographic projection of each luminescent unit on the substrate at least partially overlaps with the orthographic projection of each filter part on the substrate.

[0038] According to the display panel of the embodiment of the present application, the display panel includes a substrate, a filter layer, an isolation structure, and a light-emitting layer. The filter layer and the light-emitting layer are arranged on both sides of the substrate to form a display panel with a bottom light-emitting structure. The light emitted by the light-emitting unit displays the same color as the corresponding filter part under the filtering effect of the filter part, thereby realizing color display of the display panel. The isolation structure is arranged on the substrate and encloses a plurality of isolation openings to separate the light-emitting layer to form mutually disconnected light-emitting units, which can reduce the crosstalk of carriers in the light-emitting layer, thereby improving the performance of the display panel. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] 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.

[0040] Figure 1 is a partial cross-sectional view of a display panel provided in an embodiment of the present application;

[0041] Figure 2 is a partial cross-sectional view of a display panel in another embodiment;

[0042] Figure 3 is a partial top view of a display panel provided in an embodiment of the present application;

[0043] Figure 4 is a partial cross-sectional view of a display panel in yet another embodiment;

[0044] Figure 5 is a partial top view of a display panel in another embodiment;

[0045] Figure 6is a partial top view of a display panel in yet another embodiment;

[0046] Figure 7 is a partial top view of a display panel in yet another embodiment;

[0047] Figure 8 is a partial top view of a display panel in yet another embodiment;

[0048] Fig. 9 is a partial top view of a display panel in yet another embodiment;

[0049] Fig.10 is a partial top view of a display panel in yet another embodiment;

[0050] Fig.11 is a partial cross-sectional view of a display panel in yet another embodiment;

[0051] Fig.12 is a partial cross-sectional view of a display panel in yet another embodiment;

[0052] Fig.13 It is a schematic flow chart of a method for preparing a display panel provided in an embodiment of the present application.

[0053] Description of reference numerals:

[0054] 10. Display panel;

[0055] 100. Substrate;

[0056] 200, filter layer; 210, filter part; 211, first filter part; 212, second filter part; 213, third filter part; 214, transparent filter part; 220, black matrix;

[0057] 300, isolation structure; 301, main body; 302, frame; 310, first conductive layer; 320, second layer; 330, third layer; 340, isolation opening;

[0058] 400, light-emitting layer; 410, light-emitting unit; 411, first light-emitting unit; 412, second light-emitting unit; 413, third light-emitting unit; 414, fourth light-emitting unit; 420, display unit;

[0059] 500, first electrode layer; 510, first electrode;

[0060] 600, pixel definition layer; 610, pixel defining portion; 620, pixel opening; 630, clearance opening; 640, pixel electrode;

[0061] 700, encapsulation layer; 710, first sublayer; 720, second sublayer; 730, third sublayer. DETAILED DESCRIPTION

[0062] 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.

[0063] 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.

[0064] 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.

[0065] Embodiments of the present application provide a display panel, a display device, and a method for manufacturing a display panel. Embodiments of the display panel, the display device, and the method for manufacturing a display panel are described below in conjunction with the accompanying drawings.

[0066] An embodiment of the present application provides a display panel, which may be an organic light emitting diode (OLED) display panel.

[0067] See also Figure 1 , Figure 1 It is a partial cross-sectional view of a display panel provided in an embodiment of the present application.

[0068] like Figure 1As shown, a first aspect of the present application provides a display panel 10, which includes a substrate 100, a filter layer 200, an isolation structure 300 and a light-emitting layer 400; the filter layer 200 is located on the substrate 100, and includes a plurality of filter portions 210 distributed at intervals; the isolation structure 300 is located on a side of the substrate 100 away from the filter layer 200 and encloses a plurality of isolation openings 340; the light-emitting layer 400 is located on a side of the substrate 100 away from the filter layer 200, and the light-emitting layer 400 includes light-emitting units 410 located in the isolation openings 340, and the orthographic projection of each light-emitting unit 410 on the substrate 100 at least partially overlaps with the orthographic projection of each filter portion 210 on the substrate 100.

[0069] According to the display panel 10 of the embodiment of the present application, the display panel 10 includes a substrate 100, a filter layer 200, an isolation structure 300, and a light-emitting layer 400. The filter layer 200 and the light-emitting layer 400 are disposed on both sides of the substrate 100 to form a display panel 10 with a bottom light-emitting structure. The light emitted by the light-emitting unit 410 displays the same color as the corresponding light-filtering unit 210 under the filtering effect of the filter part 210, thereby realizing the color display of the display panel 10. The isolation structure 300 is disposed on the substrate 100 and encloses a plurality of isolation openings 340 to separate the light-emitting layer 400 to form mutually disconnected light-emitting units 410, which can reduce the crosstalk of carriers in the light-emitting layer 400, thereby improving the performance of the display panel 10.

[0070] There are many ways to set the substrate 100. For example, the substrate 100 may include a substrate and an array substrate arranged on the substrate. Alternatively, the substrate 100 is the substrate. Alternatively, the substrate 100 includes a buffer layer and a support plate on a side away from the substrate.

[0071] See also Figure 2 , Figure 2 is a partial cross-sectional view of a display panel in another embodiment.

[0072] like Figure 2 As shown, in some optional embodiments, the isolation structure 300 includes a first conductive layer 310, and the display panel 10 also includes a first electrode layer 500, the first electrode layer 500 is located on the side of the light-emitting layer 400 away from the substrate 100, the first electrode layer 500 includes a first electrode 510 located in the isolation opening 340, and the first electrode 510 is electrically connected to the first conductive layer 310.

[0073] In these optional embodiments, the isolation structure 300 is disposed on the substrate 100 and encloses a plurality of isolation openings 340 to separate the first electrode layer 500 to form mutually disconnected first electrodes 510. The light-emitting unit 410 does not need to use a precision mask, which can reduce the development and use of precision masks and reduce the preparation cost. The mutually spaced first electrodes 510 are electrically connected through the first conductive layer 310 to form a whole-surface electrode. The normal light emission of the display panel 10 is ensured.

[0074] See also Figure 3 , Figure 3 It is a partial top view of a display panel provided in an embodiment of the present application.

[0075] like Figure 3 As shown, optionally, the display panel 10 further includes a signal line layer, the signal line layer includes a power supply voltage line, the isolation structure 300 has a main body 301 and a frame 302 arranged around the main body 301, the pixel openings 610 are all located in the frame 302, the frame 302 is electrically connected to the power supply voltage line through the first conductive layer 310, so that the isolation structure 300 is electrically connected to the power supply voltage line, and the power supply voltage line provides an electrical signal to the isolation structure 300 to electrically conduct each first electrode 510, so as to achieve full-surface conduction of the first electrode 510. The main body 301 of the isolation structure 300 encloses the isolation opening 340, and the main body 301 and the frame 302 enclose the isolation opening 340, that is, the isolation opening 340 is all located in the frame 302.

[0076] In some optional embodiments, the thickness of the first conductive layer 310 in the thickness direction of the display panel 10 is 0.5 μm to 2 μm.

[0077] In these optional embodiments, the thickness of the first conductive layer 310 is greater than or equal to 0.5 μm, which can improve the problem that the first conductive layer 310 is too thin, resulting in a large resistance of the first conductive layer 310, and the first electrode 510 is difficult to be thinned to save the material of the first electrode 510 and reduce the preparation time of the first electrode 510. The thickness of the first conductive layer 310 is less than or equal to 2 μm, which can improve the problem that the material cost of the first conductive layer 310 is high due to the excessive thickness of the first conductive layer 310.

[0078] Optionally, the orthographic projection of each light-emitting unit 410 on the substrate 100 is located within the orthographic projection of each first electrode 510 on the substrate 100, that is, the first electrode 510 is arranged to cover the light-emitting unit 410, thereby ensuring normal light emission of the light-emitting unit 410 and improving the display effect of the display panel 10.

[0079] Optionally, the light-emitting unit 410 and the isolation structure 300 are spaced apart, and the light-emitting layer 400 and the isolation structure 300 are spaced apart, that is, the light-emitting units 410 are disconnected from each other, thereby reducing the crosstalk of carriers between the light-emitting units 410 and improving the cross-color problem of the light-emitting units 410.

[0080] In some optional embodiments, the isolation structure 300 further includes a second layer 320 located on a side of the first conductive layer 310 facing away from the substrate 100 , and an orthographic projection of the first conductive layer 310 on the substrate 100 is located within an orthographic projection of the second layer 320 on the substrate 100 .

[0081] In these optional embodiments, the first conductive layer 310 and the second layer 320 are arranged to form an isolation structure 300, the orthographic projection of the first conductive layer 310 arranged close to the substrate 100 on the substrate 100 is located within the orthographic projection of the second layer 320 on the substrate 100, the area of ​​the second layer 320 is larger than the area of ​​the first conductive layer 310, and the second layer 320 covers the surface of the first conductive layer 310 close to the second layer 320, and at this time, the first conductive layer 310 is recessed relative to the second layer 320 in a direction away from the isolation opening 340. When preparing the light-emitting layer 400, the light-emitting layer 400 has a large drop at the edge of the isolation structure 300, and the first conductive layer 310 is recessed relative to the second layer 320, and the light-emitting layer 400 is difficult to connect at the edge of the isolation structure 300, so it breaks, and the light-emitting layer 400 breaks to form mutually disconnected light-emitting units 410.

[0082] In some optional embodiments, the second layer 320 includes a conductive material or an insulating material.

[0083] In these optional embodiments, the second layer 320 includes a conductive material, for example, the second layer 320 includes a non-metallic conductive material or a metallic conductive material. When the second layer 320 is a non-metallic conductive material or an insulating material, the second layer 320 is difficult to be etched during wet etching of the first conductive layer 310 using an etching solution, so that the first conductive layer 310 is more easily concavely disposed relative to the second layer 320.

[0084] In some optional embodiments, the second layer 320 includes a metal material, and the first conductive layer 310 and the second layer 320 are made of different materials.

[0085] In these optional embodiments, when both the first conductive layer 310 and the second layer 320 are made of metal materials, the first conductive layer 310 may be wet-etched with an etching solution, and the etching solution may be set so that the etching rate of the second layer 320 is lower than the etching rate of the first conductive layer 310. Since the etching rate of the first conductive layer 310 is relatively high, when the etching solution is used for wet etching, even if the second layer 320 is etched to a certain extent, the first conductive layer 310 is etched faster, so that the first conductive layer 310 is set concave relative to the second layer 320.

[0086] See also Figure 4 , Figure 4 is a partial cross-sectional view of a display panel in yet another embodiment.

[0087] like Figure 4 As shown, in some optional embodiments, the isolation structure 300 further includes a third layer 330 located on the side of the first conductive layer 310 facing the substrate 100 , and the orthographic projection of the first conductive layer 310 on the substrate 100 is located within the orthographic projection of the third layer 330 on the substrate 100 .

[0088] In these optional embodiments, in order to obtain the first conductive layer 310 with a concave setting, the first conductive layer 310 has a faster etching rate relative to the second layer 320 and the third layer 330 during the etching process, thereby forming the concave first conductive layer 310. Since the etching rate of the first conductive layer 310 is faster, the waste generated by etching is more likely to enter other positions of the display panel 10, thereby causing adverse effects. After the third layer 330 is set, the first conductive layer 310 can be well attached to the third layer 330, and the generated etching waste falls on the third layer 330, which is easy to clean.

[0089] See also Figure 5 , Figure 5 FIG. 4 is a partial top view of a display panel in another embodiment.

[0090] like Figure 5 As shown, in some optional embodiments, the light emitting unit 410 is a white light emitting unit, and the filter portion 210 includes a first filter portion 211 , a second filter portion 212 , and a third filter portion 213 of different colors.

[0091] In these optional embodiments, each light-emitting unit 410 emits white light, so that the emitted white light passes through the first filter section 211, the second filter section 212 and the third filter section 213 of different colors to emit light of different colors. For example, the first filter section 211, the second filter section 212 and the third filter section 213 are respectively a red filter section 210, a green filter section 210 and a blue filter section 210. Then, the light emitted by the light-emitting unit 410 emits red light through the first filter section 211, emits green light through the second filter section 212, and emits blue light through the third filter section 213, so as to realize color display of the display panel 10.

[0092] Optionally, the light-emitting unit 410 includes a first light-emitting unit 411, a second light-emitting unit 412 and a third light-emitting unit 413 that are distributed at intervals, and the orthographic projection of the first light-emitting unit 411 on the substrate 100 at least partially overlaps with the orthographic projection of the first filter portion 211 on the substrate 100, so that the light emitted by the first light-emitting unit 411 can pass through the first filter portion 211 and display light of the same color as the first filter portion 211; the orthographic projection of the second light-emitting unit 412 on the substrate 100 at least partially overlaps with the orthographic projection of the second filter portion 212 on the substrate 100, so that the light emitted by the second light-emitting unit 412 can pass through the second filter portion 212 and display light of the same color as the second filter portion 212; the orthographic projection of the third light-emitting unit 413 on the substrate 100 at least partially overlaps with the orthographic projection of the third filter portion 213 on the substrate 100, so that the light emitted by the third light-emitting unit 413 can pass through the third filter portion 213 and display light of the same color as the third filter portion 213. For example, the first filter section 211, the second filter section 212 and the third filter section 213 are respectively a red filter section, a green filter section and a blue filter section. Then, the light emitted by the first light-emitting unit 411 passes through the first filter section 211 to emit red light, the light emitted by the second light-emitting unit 412 passes through the second filter section 212 to emit green light, and the light emitted by the third light-emitting unit 413 passes through the third filter section 213 to emit blue light, so as to realize color display of the display panel 10.

[0093] See also Figure 6 , Figure 6 FIG. 4 is a partial top view of a display panel in yet another embodiment.

[0094] like Figure 6 As shown, in some optional embodiments, the light-emitting unit 410 further includes a fourth light-emitting unit 414, the filter portion 210 further includes a transparent filter portion 214, and the orthographic projection of the fourth light-emitting unit 414 on the substrate 100 at least partially overlaps with the orthographic projection of the transparent filter portion 214 on the substrate 100.

[0095] In these optional embodiments, the orthographic projection of the fourth light-emitting unit 414 on the substrate 100 at least partially overlaps with the orthographic projection of the transparent filter portion 214 on the substrate 100. Since the transparent filter portion 214 is made of transparent material, the light emitted by the fourth light-emitting unit 414 is still white light after passing through the transparent filter portion 214, and the transparent filter portion 214 has no filtering effect on the fourth light-emitting unit 414.

[0096] See also Figure 7 , Figure 7 FIG. 4 is a partial top view of a display panel in yet another embodiment.

[0097] like Figure 7 As shown, in some optional embodiments, a display unit 420 is disposed in the isolation opening 340 , and the display unit 420 includes a first light emitting unit 411 , a second light emitting unit 412 , and a third light emitting unit 413 .

[0098] In these optional embodiments, the first light-emitting unit 411, the second light-emitting unit 412 and the third light-emitting unit 413 form a display unit 420, and the plurality of display units 420 are arranged in an array, so that the display panel 10 emits light uniformly, and the uniformity and display effect of the display panel 10 can be improved. In addition, the display unit 420 is disposed in the isolation opening 340, and no isolation structure 300 is disposed between the light-emitting units 410 in the display unit 420, so that each light-emitting unit 410 can be disposed in a larger area, that is, the aperture ratio of each light-emitting unit 410 is increased, and the display effect of the display panel 10 is improved.

[0099] Optionally, the display unit 420 may be a unit for emitting white light composed of a plurality of light emitting units 410. For example, the first light emitting unit 411, the second light emitting unit 412 and the third light emitting unit 413 may be combined to form the display unit 420 for emitting white light.

[0100] See also Figure 8 , Figure 8 FIG. 4 is a partial top view of a display panel in yet another embodiment.

[0101] like Figure 8 As shown, optionally, the display unit 420 also includes a fourth light-emitting unit 414. The first light-emitting unit 411, the second light-emitting unit 412, the third light-emitting unit 413 and the fourth light-emitting unit 414 form the display unit 420. The display unit 420 includes four light-emitting units 410 with different corresponding filter part colors. The aperture ratio of the fourth light-emitting unit 414 can also be improved, thereby improving the overall display effect of the display panel 10.

[0102] Optionally, the orthographic projection of each light-emitting unit 410 on the substrate 100 is located within the orthographic projection of each filter portion 210 on the substrate 100, so that more light emitted by each light-emitting unit 410 can pass through the filter portion 210 to achieve color display, thereby improving the display effect of the display panel 10.

[0103] See also Fig. 9 , Fig. 9 FIG. 4 is a partial top view of a display panel in yet another embodiment.

[0104] Optionally, the first light-emitting unit 411, the second light-emitting unit 412 and the third light-emitting unit 413 are arranged around the fourth light-emitting unit 414, and the first light-emitting unit 411, the second light-emitting unit 412, the third light-emitting unit 413 and the fourth light-emitting unit 414 are respectively located in each isolation opening 340, and the fourth light-emitting unit 414 is located in the middle position. Since the fourth light-emitting unit 414 emits white light, the brightness of white light in the area enclosed by the first light-emitting unit 411, the second light-emitting unit 412 and the third light-emitting unit 413 can be increased, and the brightness of white light of the display panel 10 can be made more uniform, thereby improving the display effect of the display panel 10.

[0105] See also Fig.10 , Fig.10 FIG. 4 is a partial top view of a display panel in yet another embodiment.

[0106] Optionally, the first light-emitting unit 411, the second light-emitting unit 412 and the third light-emitting unit 413 are arranged around the fourth light-emitting unit 414, and the first light-emitting unit 411, the second light-emitting unit 412, the third light-emitting unit 413 and the fourth light-emitting unit 414 are located in the same isolation opening 340, and the fourth light-emitting unit 414 is located in the middle position. Since the fourth light-emitting unit 414 emits white light, the brightness of white light in the area enclosed by the first light-emitting unit 411, the second light-emitting unit 412 and the third light-emitting unit 413 can be increased, and the brightness of white light of the display panel 10 can be made more uniform. In addition, no isolation structure 300 is set between the light-emitting units 410 in the same isolation opening 340, so that each light-emitting unit 410 can be set in a larger area, that is, the opening ratio of each light-emitting unit 410 is increased, and the display effect of the display panel 10 is improved.

[0107] When each light-emitting unit 410 is located in each isolation opening 340, the isolation structure 300 can be used to isolate the light-emitting layer 400 to prepare each light-emitting unit 410. When the isolation structure 300 is used to prepare the light-emitting unit 410, the development and use of precision masks can be reduced, and the preparation cost can be reduced. When each light-emitting unit 410 is located in each isolation opening 340, each first electrode 510 is also isolated by the isolation structure 300 and is located in each isolation opening 340. Each first electrode 510 can be isolated from each other, and each first electrode 510 can be independently controlled.

[0108] When multiple light-emitting units 410 are located in the same isolation opening 340, a precision mask can be used to prepare each light-emitting unit 410. When multiple light-emitting units 410 are located in the same isolation opening 340, each first electrode 510 is separated by the isolation structure 300 and located in each isolation opening 340. The first electrode 510 in the same isolation opening 340 corresponds to multiple light-emitting units 410 at the same time, so that the light emission of multiple light-emitting units 410 is synchronously controlled by the same first electrode 510.

[0109] In some optional embodiments, a black matrix 220 is disposed between adjacent filter portions 210 .

[0110] In these optional embodiments, a black matrix 220 is provided between the filter portions 210 to improve defects such as cross-coloring between adjacent filter portions 210 .

[0111] In some optional embodiments, the display panel 10 further includes a pixel definition layer 600 , where the pixel definition layer 600 is located on the substrate 100 , and the pixel definition layer 600 includes a pixel defining portion 610 and a pixel opening 620 enclosed by the pixel defining portion 610 .

[0112] In these optional embodiments, the pixel defining portion 610 of the pixel defining layer 600 encloses a pixel opening 620 to set the light emitting unit 410 and realize normal light emission of the light emitting unit 410. In addition, the pixel defining portion 610 defines the setting area of ​​each light emitting unit 410 to reduce the cross-color defect between each light emitting unit 410.

[0113] like Figures 1 to 4 As shown, in some optional embodiments, the isolation structure 300 is located on a side of the pixel defining portion 610 facing away from the substrate 100 .

[0114] In these optional embodiments, the isolation structure 300 is disposed on the pixel defining portion 610, and the isolation structure 300 has a large height difference equivalent to the pixel opening 620. When preparing the light-emitting layer 400, due to the large height difference, the light-emitting layer 400 is more easily disconnected at the isolation structure 300, thereby reducing the difficulty of preparing the light-emitting layer 400.

[0115] See also Fig.11 , Fig.11 is a partial cross-sectional view of a display panel in yet another embodiment.

[0116] like Fig.11 As shown, in some optional embodiments, a clearance opening 630 is opened on the pixel defining portion 610 , and the isolation structure 300 is located in the clearance opening 630 .

[0117] In these optional embodiments, the isolation structure 300 is disposed in the clearance opening 630 on the pixel defining portion 610. During the preparation process, the preparation step of the isolation structure 300 is performed before the preparation of the pixel electrode 640. That is, after the isolation structure 300 is prepared on the substrate 100, the pixel electrode 640 is prepared on the substrate 100, so as to reduce the impact of the preparation of the isolation structure 300 on the pixel electrode 640 and ensure that the pixel electrode 640 is not damaged.

[0118] Optionally, the display panel 10 further includes a pixel electrode 640, which is exposed by the pixel opening 620. One of the pixel electrode 640 and the first electrode 510 serves as an anode of the light-emitting unit 410, and the other serves as a cathode of the light-emitting unit 410. In the embodiment of the present application, the pixel electrode 640 is used as the anode of the light-emitting unit 410, and the first electrode 510 is used as the cathode of the light-emitting unit 410 for illustration.

[0119] Optionally, the pixel electrode 640 includes a transparent conductive material, for example, the pixel electrode 640 includes indium tin oxide (ITO). When the pixel electrode 640 is a transparent material, the light emitted by the light-emitting unit 410 can pass through the pixel electrode 640 to reach the filter portion 210, thereby reducing the light blocking of the light-emitting unit 410 by the pixel electrode 640 and improving the display effect of the display panel 10.

[0120] See also Fig.12 , Fig.12 is a partial cross-sectional view of a display panel in yet another embodiment.

[0121] like Fig.12 As shown, in some optional embodiments, the display panel 10 further includes an encapsulation layer 700 , and the encapsulation layer 700 is located on a side of the first electrode layer 500 facing away from the substrate 100 .

[0122] In these optional embodiments, the encapsulation layer 700 is disposed on the side of the first electrode layer 500 facing away from the substrate 100 to encapsulate the first electrode layer 500 and the light-emitting layer 400 , reduce the possibility of water and oxygen intrusion, and increase the service life of the display panel 10 .

[0123] In some optional embodiments, the encapsulation layer 700 includes a first sublayer 710 , and the first sublayer 710 is located on a side of the light emitting layer 400 facing away from the substrate 100 .

[0124] In these optional embodiments, the first sublayer 710 is disposed on the side of the first electrode layer 500 facing away from the substrate 100 to encapsulate the first electrode layer 500 and the light-emitting layer 400, reduce the possibility of water and oxygen intrusion, and increase the service life of the display panel 10.

[0125] Optionally, the first sublayer 710 includes an inorganic material, which has good density and good barrier properties against water vapor and oxygen.

[0126] In some optional embodiments, the encapsulation layer 700 further includes a second sub-layer 720 , and the second sub-layer 720 is located on a side of the first sub-layer 710 facing away from the substrate 100 .

[0127] In these optional embodiments, the encapsulation layer 700 includes a first sub-layer 710 and a second sub-layer 720 , and multi-layer encapsulation is performed using the first sub-layer 710 and the second sub-layer 720 to further improve the encapsulation performance of the encapsulation layer 700 .

[0128] Optionally, the second sublayer 720 includes an organic material, and the second sublayer 720 is encapsulated by the organic material to further improve the encapsulation performance of the encapsulation layer 700 .

[0129] Optionally, the encapsulation layer 700 further includes a third sublayer 730 , which is located on the side of the second sublayer 720 away from the substrate 100 . The encapsulation layer 700 adopts three-layer encapsulation, has better encapsulation performance, and reduces the possibility of water and oxygen intrusion.

[0130] Optionally, the third sublayer 730 includes inorganic materials, and the first sublayer 710 , the second sublayer 720 and the third sublayer 730 are respectively encapsulated with inorganic materials, organic materials and inorganic materials to form a TFE (Thin Film Encapsulation, TFE) thin film encapsulation structure to further improve the encapsulation performance of the encapsulation layer 700 .

[0131] Optionally, the light emitting layer 400 includes an electron injection layer (EIL), an electron transport layer (ETL), a light emitting material layer, a hole injection layer (HIL) and a hole transport layer (HTL).

[0132] The structural design in this embodiment can be applied to other display panels 10 , and the specific selection can be made according to actual conditions, and this application does not impose any specific restrictions on it.

[0133] The embodiment of the second aspect of the present application also provides a display device, including the display panel 10 of any of the above-mentioned first aspect embodiments. Since the display device provided by the embodiment of the second aspect of the present application includes the display panel 10 of any of the above-mentioned first aspect embodiments, the display device provided by the embodiment of the second aspect of the present application has the beneficial effects of the display panel 10 of any of the above-mentioned first aspect embodiments, which will not be repeated here.

[0134] 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.

[0135] The third aspect of the present application also provides a method for preparing a display panel 10. The display panel 10 may be any of the display panels 10 provided in the first aspect of the present application. Figures 1 to 13 , Fig.13 1 is a schematic flow chart of a method for preparing a display panel provided in an embodiment of the present application. The preparation method comprises:

[0136] Step S01: preparing a filter layer, wherein the filter layer comprises a plurality of filter parts distributed at intervals.

[0137] Step S02: preparing a substrate on the filter layer.

[0138] Step S03: preparing an isolation structure on a side of the substrate away from the filter layer, wherein the isolation structure encloses a plurality of isolation openings.

[0139] Step S04: preparing a light-emitting layer on the side of the substrate away from the filter layer, the light-emitting layer comprising light-emitting units located in the isolation openings, and the orthographic projection of each light-emitting unit on the substrate at least partially overlaps with the orthographic projection of each filter part on the substrate.

[0140] According to the preparation method of the embodiment of the present application, the filter layer 200 is prepared by step S01, and the filter layer 200 includes a plurality of filter parts 210 distributed at intervals. The substrate 100 is prepared by step S02. Then, the isolation structure 300 is prepared by step S03. Finally, the light-emitting layer 400 is prepared by step S04, and the filter layer 200 and the light-emitting layer 400 are arranged on both sides of the substrate 100 to form a display panel 10 with a bottom light-emitting structure. The light emitted by the light-emitting unit 410 displays the same color as the corresponding light-emitting unit 210 under the filtering effect of the filter part 210, thereby realizing the color display of the display panel 10. The isolation structure 300 is arranged on the substrate 100 and encloses a plurality of isolation openings 340 to separate the light-emitting layer 400 to form mutually disconnected light-emitting units 410, which can reduce the crosstalk of carriers in the light-emitting layer 400, thereby improving the performance of the display panel 10.

[0141] According to the embodiments described above, these embodiments do not describe all the details in detail, nor do they limit the invention to the specific embodiments described. 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 limited only by the claims and their full scope and equivalents.

Claims

1. A display panel, characterized in that: include: substrate; A filter layer, located on the substrate, includes a plurality of filter portions distributed at intervals; An isolation structure is located on a side of the substrate away from the filter layer and encloses a plurality of isolation openings; The light-emitting layer is located on a side of the substrate away from the filter layer. The light-emitting layer includes light-emitting units located in the isolation openings. The orthographic projection of each light-emitting unit on the substrate at least partially overlaps with the orthographic projection of each filter portion on the substrate.

2. The display panel according to claim 1, characterized in that: The light-emitting unit is a white light-emitting unit, the light-emitting unit comprises a first light-emitting unit, a second light-emitting unit and a third light-emitting unit which are distributed at intervals, and the filter section comprises a first filter section, a second filter section and a third filter section which are different in colors; The orthographic projection of the first light emitting unit on the substrate at least partially overlaps with the orthographic projection of the first filter portion on the substrate, the orthographic projection of the second light emitting unit on the substrate at least partially overlaps with the orthographic projection of the second filter portion on the substrate, and the orthographic projection of the third light emitting unit on the substrate at least partially overlaps with the orthographic projection of the third filter portion on the substrate; Preferably, a black matrix is ​​arranged between adjacent filter parts.

3. The display panel according to claim 2, characterized in that: The light-emitting unit further includes a fourth light-emitting unit, and the first light-emitting unit, the second light-emitting unit, the third light-emitting unit and the fourth light-emitting unit are respectively located in the isolation openings; or, the first light-emitting unit, the second light-emitting unit, the third light-emitting unit and the fourth light-emitting unit are located in the same isolation opening; Preferably, the filter portion further includes a transparent filter portion, and an orthographic projection of the fourth light emitting unit on the substrate at least partially overlaps with an orthographic projection of the transparent filter portion on the substrate.

4. The display panel according to claim 3, characterized in that: The first light emitting unit, the second light emitting unit and the third light emitting unit are arranged around the fourth light emitting unit; Alternatively, the first light emitting unit, the second light emitting unit, the third light emitting unit and the fourth light emitting unit are arranged in an array.

5. The display panel according to claim 3, characterized in that: The isolation structure includes a first conductive layer, and the display panel further includes: A first electrode layer, located on a side of the light-emitting layer away from the substrate, the first electrode layer comprising a first electrode located in the isolation opening, the first electrode being electrically connected to the first conductive layer; Preferably, the first light-emitting unit, the second light-emitting unit, the third light-emitting unit and the fourth light-emitting unit correspond to four first electrodes respectively, and are respectively located in each of the isolation openings; Preferably, the first light emitting unit, the second light emitting unit, the third light emitting unit and the fourth light emitting unit located in the same isolation opening share one first electrode; Preferably, the display panel further comprises a signal line layer, the signal line layer comprises a power supply voltage line, the isolation structure comprises a main body and a frame arranged around the main body, the pixel openings are all located in the frame, and the frame is electrically connected to the power supply voltage line through the first conductive layer; Preferably, the thickness of the first conductive layer in the thickness direction of the display panel is 0.5 μm to 2 μm; Preferably, the orthographic projection of each of the light-emitting units on the substrate is located within the orthographic projection of each of the first electrodes on the substrate; Preferably, the light emitting unit and the first conductive layer are spaced apart from each other.

6. The display panel according to claim 5, characterized in that: The isolation structure further includes a second layer located on a side of the first conductive layer away from the substrate, and an orthographic projection of the first conductive layer on the substrate is located within an orthographic projection of the second layer on the substrate; Preferably, the second layer comprises a conductive material or an insulating material; Preferably, the second layer comprises a metal material, and the first conductive layer and the second layer are made of different materials; Preferably, the isolation structure further comprises a third layer located on a side of the first conductive layer facing the substrate, and an orthographic projection of the first conductive layer on the substrate is located within an orthographic projection of the third layer on the substrate.

7. The display panel according to claim 1, characterized in that: The display panel further includes: A pixel definition layer, located on the substrate, the pixel definition layer comprising a pixel definition portion and a pixel opening formed by the pixel definition portion; Preferably, the isolation structure is located on a side of the pixel defining portion away from the substrate; Preferably, a clearance opening is provided on the pixel defining portion, and the isolation structure is located in the clearance opening; Preferably, the display panel further comprises a pixel electrode, and the pixel electrode is exposed from the pixel opening; Preferably, the pixel electrode comprises a transparent conductive material.

8. The display panel according to claim 5, characterized in that: The display panel further includes: an encapsulation layer, located on a side of the first electrode layer away from the substrate; Preferably, the encapsulation layer comprises: A first sublayer, located on a side of the light-emitting layer away from the substrate; Preferably, the first sublayer comprises an inorganic material; Preferably, the encapsulation layer further comprises a second sublayer, and the second sublayer is located on a side of the first sublayer away from the substrate; Preferably, the second sublayer comprises an organic material; Preferably, the encapsulation layer further comprises a third sublayer, and the third sublayer is located on a side of the second sublayer away from the substrate; Preferably, the third sublayer comprises an inorganic material.

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

10. A method for preparing a display panel, characterized in that: include: Prepare a filter layer, wherein the filter layer includes a plurality of filter parts distributed at intervals; preparing a substrate on the filter layer; An isolation structure is prepared on a side of the substrate facing away from the filter layer, wherein the isolation structure encloses a plurality of isolation openings; A light-emitting layer is prepared on the side of the substrate away from the filter layer. The light-emitting layer includes light-emitting units located in the isolation openings. The orthographic projection of each light-emitting unit on the substrate at least partially overlaps with the orthographic projection of each filter portion on the substrate.

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