Display panel and display device

Abstract

Embodiments of the present application provide a display panel and a display device. The display panel comprises a substrate, a light-emitting structure layer, a color conversion layer and a reflective layer. The light-emitting structure layer is located on a side of the substrate, and the light-emitting structure layer comprises a plurality of light-emitting units arranged at intervals. The color conversion layer is located on the side of the light-emitting structure layer away from the substrate. The color conversion layer comprises a plurality of color conversion portions arranged at intervals, and the orthographic projection of each color conversion portion on the substrate covers the orthographic projection of one of the light-emitting units corresponding thereto on the substrate. The reflective layer is located on a same side of the light-emitting structure layer as the color conversion layer and comprises a plurality of reflecting elements. Each reflecting element is disposed corresponding to one of the light-emitting units, and the extension direction of the reflecting element intersects the extension direction of a plane in which the substrate is located. At least part of light emitted by a light-emitting unit is emitted to a reflecting element corresponding thereto, and is reflected to a color conversion portion corresponding to the light-emitting unit. Thus, the utilization rate of light can be improved.

Description

Display panel and display device Technical Field

[0001] This application relates to the field of display technology, specifically to a display panel and a display device. Background Technology

[0002] The display panel, including the color conversion layer, works by using a single light-emitting device as a backlight to excite the color conversion material in the color conversion layer, which then emits different colors of light. For example, the light-emitting device can be a blue organic light-emitting device, and the color conversion material can include photochromic quantum dot materials. The light emitted by the blue organic light-emitting device is converted by the color conversion layer to obtain different colors of light, thereby achieving full-color display. Summary of the Invention

[0003] This application provides a display panel, including:

[0004] Substrate;

[0005] A light-emitting structure layer is located on one side of the substrate, and the light-emitting structure layer includes a plurality of light-emitting units arranged at intervals;

[0006] A color conversion layer is located on the side of the light-emitting structure layer away from the substrate. The color conversion layer includes a plurality of spaced color conversion parts. The orthographic projection of each color conversion part on the substrate covers the orthographic projection of one of the corresponding light-emitting units on the substrate.

[0007] The reflective layer, located on the same side of the light-emitting structure layer as the color conversion layer, includes multiple reflective elements. Each reflective element is correspondingly disposed with one light-emitting unit. The extending direction of the reflective element intersects with the extending direction of the plane where the substrate is located. At least a portion of the light emitted by the light-emitting unit is directed toward the reflective element corresponding to it and is reflected to the color conversion part corresponding to the light-emitting unit.

[0008] In some embodiments, the display panel further includes a dam layer located on the same side of the light-emitting structure layer as the reflective layer. The dam layer includes a plurality of dam patterns and a plurality of first openings spaced apart by the dam patterns. Each first opening is filled with at least a portion of the color conversion portion. The dam patterns also define a plurality of second openings located between two adjacent first openings in a direction from the substrate toward the light-emitting structure layer. The cross-section of the second openings of the dam patterns is an inverted trapezoid. The reflective element is located on a sidewall between the dam patterns and the second openings.

[0009] In some embodiments, the area enclosed by the orthographic projection of the reflective element on the substrate covers the orthographic projection of the corresponding light-emitting unit on the substrate, and the orthographic projection of the reflective element on the substrate is annular.

[0010] In some embodiments, the light-emitting structure layer further includes a pixel defining layer, the pixel defining layer having a plurality of pixel openings, each of the light-emitting units being located within a corresponding pixel opening, and the orthogonal projection of the side of the first opening near the substrate onto the substrate covers the orthogonal projection of the opening surface of the pixel opening away from the substrate onto the substrate.

[0011] In some embodiments, an inorganic encapsulation layer and an organic material layer are sequentially stacked on the side of the reflective layer away from the substrate, wherein the organic material layer includes at least one of a light-transmitting material and a light-shielding material.

[0012] In some embodiments, the display panel further includes a dam layer located on the same side of the light-emitting structure layer as the reflective layer. The dam layer includes a plurality of dam patterns and a plurality of first openings spaced apart by the dam patterns. Each first opening is filled with at least a portion of the color conversion portion. The cross-section of the first opening is trapezoidal along the direction from the substrate to the light-emitting structure layer. The reflective element is disposed on the sidewall of the first opening.

[0013] In some embodiments, the reflective element is in contact with the color conversion section.

[0014] In some embodiments, the orthographic projection of the side surface of the first opening near the substrate onto the substrate covers the orthographic projection of the corresponding light-emitting unit onto the substrate, the enclosed area of ​​the orthographic projection of the reflective element onto the substrate covers the orthographic projection of the corresponding light-emitting unit onto the substrate, and the orthographic projection of the reflective element onto the substrate is annular.

[0015] In some embodiments, the first opening penetrates the dam layer, and the dam layer is made of at least one of a light-shielding material and a light-transmitting material;

[0016] Alternatively, along the direction from the substrate to the light-emitting structure layer, the depth of the first opening is less than the thickness of the dam layer, and the dam layer is made of a light-transmitting material.

[0017] In some embodiments, the display panel further includes an encapsulation layer located on the side of the light-emitting structure layer away from the substrate, the encapsulation layer including an organic encapsulation layer, the organic encapsulation layer being reused as the dam layer.

[0018] In some embodiments, the display panel further includes an encapsulation layer located on the side of the light-emitting structure layer away from the substrate, the encapsulation layer including an organic encapsulation layer, and the reflective layer located within the organic encapsulation layer.

[0019] In some embodiments, the organic encapsulation layer includes a first organic encapsulation layer located on the side of the light-emitting structure layer away from the substrate. The first organic encapsulation layer has a plurality of spaced first protrusions. The orthographic projection of each first protrusion on the substrate overlaps the orthographic projection of one of the color conversion parts on the substrate. Along the direction from the substrate to the light-emitting structure layer, the cross-section of the first protrusion gradually decreases, and the cross-section is parallel to the surface of the substrate facing the light-emitting structure layer. Each of the reflective elements is disposed on the sidewall of the corresponding first protrusion.

[0020] In some embodiments, the orthographic projection of the side surface of the first protrusion near the substrate on the substrate covers the orthographic projection of its corresponding light-emitting unit on the substrate, the enclosed area of ​​the orthographic projection of the reflective element on the substrate covers the orthographic projection of its corresponding light-emitting unit on the substrate, and the orthographic projection of the reflective element on the substrate is annular.

[0021] In some embodiments, the display panel further includes a second organic encapsulation layer located on the side of the first organic encapsulation layer away from the substrate, and the side surface of the color conversion portion near the substrate is in contact with the first organic encapsulation layer or the second organic encapsulation layer.

[0022] In some embodiments, the display panel further includes a second organic encapsulation layer located on the same side of the light-emitting structure layer as the first organic encapsulation layer and a first inorganic encapsulation layer located on the side of the organic encapsulation layer closer to the substrate, wherein the second organic encapsulation layer is in contact with the first inorganic encapsulation layer.

[0023] In some embodiments, the first organic encapsulation layer has a recessed portion, the orthographic projection of the recessed portion on the substrate does not overlap with the orthographic projection of the first protrusion on the substrate, and the first organic encapsulation layer is further provided with a first light blocking layer on the side away from the substrate, at least a portion of the first light blocking layer being located within the recessed portion.

[0024] In some embodiments, the display panel further includes a first inorganic encapsulation layer located on the side of the organic encapsulation layer near the substrate, and the first light blocking layer is in contact with the first inorganic encapsulation layer.

[0025] In some embodiments, the organic encapsulation layer includes a first organic encapsulation layer located on the side of the light-emitting structure layer away from the substrate. The first organic encapsulation layer has a plurality of spaced third openings. The orthographic projection of each third opening on the substrate covers the orthographic projection of one of the color conversion parts on the substrate. The cross-section of the third opening is trapezoidal along the direction from the substrate to the light-emitting structure layer. Each of the reflective elements is disposed on the sidewall of the corresponding third opening.

[0026] In some embodiments, the orthographic projection of the third opening on the substrate covers the orthographic projection of its corresponding light-emitting unit on the substrate, the enclosed area of ​​the orthographic projection of the reflective element on the substrate covers the orthographic projection of its corresponding light-emitting unit on the substrate, and the orthographic projection of the reflective element on the substrate is annular.

[0027] In some embodiments, the display panel further includes a second organic encapsulation layer located on the side of the first organic encapsulation layer away from the substrate, and the side of the organic encapsulation layer away from the substrate is further provided with a first light blocking layer, and the surface of the first light blocking layer near the substrate is in contact with the first organic encapsulation layer or the second organic encapsulation layer.

[0028] In some embodiments, the reflective element is made of metal.

[0029] In some embodiments, the reflective element has a reflective surface close to the side of the corresponding light-emitting unit, and the angle between the reflective surface and the light-emitting surface of the corresponding light-emitting unit is less than 90°.

[0030] In some embodiments, the reflective element has a reflective surface near the side of the corresponding light-emitting unit, and the angle between the reflective surface and the light-emitting surface of the corresponding light-emitting unit is greater than or equal to 45°.

[0031] In some embodiments, at least one of the color conversion units includes a quantum dot and a scatterer.

[0032] This application also provides a display device, including the aforementioned display panel.

[0033] The beneficial effects of this application include:

[0034] This application provides a reflective layer on the side of the light-emitting structure layer near the color conversion layer. In this case, a portion of the wide-view light emitted by the light-emitting structure layer is converted into reflected light after hitting the corresponding reflective element. The reflected light is then reflected by the reflective layer to the color conversion section corresponding to the light-emitting unit. This allows more light to enter the color conversion section, increasing the probability of activating the color conversion material in the color conversion section, improving the color conversion efficiency of the color conversion section, and also enhancing the utilization rate of the light emitted by the light-emitting structure layer.

[0035] Additional aspects and advantages of this application will be set forth in part in the description which follows, and will become apparent from the description or may be learned by practice of this application. Attached Figure Description

[0036] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0037] Figure 1 shows a cross-sectional view of a display panel in the related art;

[0038] Figure 2 is a top view of the display panel provided in an exemplary embodiment of this application;

[0039] Figure 3 is a cross-sectional schematic diagram of an exemplary embodiment of the present application, in which the display panel in Figure 2 is cut along the section line PP.

[0040] Figure 4 is a schematic diagram of the stacked structure of the light-emitting layer provided in an exemplary embodiment of this application;

[0041] Figure 5 is a top view of a portion of the film layer of the first pixel PX1 of the display panel in Figure 3, provided in an exemplary embodiment of this application.

[0042] Figures 6 to 20 are schematic cross-sectional views of the display panel in Figure 2, as shown in the exemplary embodiment of this application, cut along the section line PP.

[0043] In the figure: 10-Substrate; 20-Driving circuit layer; 21-Thin film transistor; 211-Active layer; 212-Gate; 213-First electrode; 214-Second electrode; 22-Capacitor; 221-First electrode plate; 222-Second electrode plate; 23-Shielding layer; 24-First insulating layer; 25-Second insulating layer; 26-Third insulating layer; 27-Interlayer dielectric layer; 28-First planarization layer; 30-Light-emitting structure layer; 31-Pixel limiting layer; 31a-Pixel aperture; 32a-First light-emitting unit (light-emitting unit); 32b-Second light-emitting unit (light-emitting unit); 32c-Third light-emitting unit (light-emitting unit); 321-First electrode; 322-Light-emitting layer; 323-Second electrode; 33-Spacer; 40-Encapsulation layer; 41-First inorganic encapsulation layer; 42-Organic encapsulation layer; 421-First organic encapsulation layer; 422-Light-emitting layer; 423-Second electrode; 33-Spacer; 40-Encapsulation layer; 41-First inorganic encapsulation layer; 42-Organic encapsulation layer; 424-First organic encapsulation layer; 425-Light-emitting structure layer; 226-Second electrode; 224-Light-emitting structure layer; 225-Second electrode; 226-Light-emitting structure layer; 227-Light-emitting structure layer; 228-First planarization layer; 30-Light-emitting structure layer; 31-Pixel limiting layer; 322-Pixel limiting layer; 323-Pixel limiting layer; 324-Pixel limiting layer; 325-Light Organic encapsulation layer; 4211-First protrusion; 4212-Recess; 4213-Third opening; 422-Second organic encapsulation layer; 43-Second inorganic encapsulation layer; 50-First light-blocking layer; 51-Organic material layer; 60-Color conversion layer; 601-Color conversion section; 601a-First color conversion section; 601b-Second color conversion section; 601c-Transmitting section; 61-Dam layer; 610-Dam pattern; 61a-First opening; 61b-Second opening; 62-Reflective layer; 621-Reflective element; 621a-First reflective element; 621b-Second reflective element; 621c-Third reflective element; 71-Third inorganic encapsulation layer; 72-Second planarization layer; 81-Second light-blocking layer; 82-Filter layer; 82a, 82b and 82c-Filter sections; 90-Third planarization layer. Detailed Implementation

[0044] The present application will be described more fully below with reference to the accompanying drawings in which embodiments are shown.

[0045] It should be noted that when element A, such as a layer, film, or region, is referred to as "on the side of element B away from element C," it means that element A can be directly on the surface of element B on the side away from element C, or that an intermediate layer, intermediate region, or intermediate element may exist between element B and element A. When element A, such as a layer, film, or region, is referred to as "between element B and element C," it means that only element A exists between element B and element C, or that an intermediate layer, intermediate region, or intermediate element may exist between element A and element B, or between element A and element C.

[0046] While terms such as "first," "second," etc., can be used to describe various components, such components are not limited by these terms. These terms are only used to distinguish one component from another and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more. Where there is no conflict, the features in the embodiments described below in this application may complement or combine with each other.

[0047] In the accompanying drawings, the symbols "x", "y", and "z" are used to indicate directions. The x, y, and z directions are not limited to the three mutually perpendicular directions in a Cartesian coordinate system and can be interpreted in a broader sense. For example, the x, y, and z directions can be perpendicular to each other, or they can represent different directions that are not perpendicular to each other. Exemplarily, x indicates a first direction, y indicates a second direction perpendicular to the first direction, and z indicates a third direction perpendicular to both the first and second directions. The first direction x, the second direction y, and the third direction z can correspond to the horizontal, vertical, and thickness directions of the display panel, respectively.

[0048] In the accompanying drawings, the dimensions and thicknesses of the elements may be enlarged for better understanding, clarity, and ease of description. However, this application is not limited to the dimensions and thicknesses shown in the drawings. The thicknesses of layers, films, panels, areas, and other elements may be exaggerated in the drawings for clarity. Example embodiments are shown in the drawings, wherein the same reference numerals denote the same elements.

[0049] In a photoluminescent quantum dot organic light-emitting device, as shown in Figure 1, adjacent color conversion sections 601 in the color conversion layer 60 of the display panel are separated by a first light-blocking layer 50. The first light-blocking layer 50 is usually made of black material, so its light transmittance is low. Some of the light emitted from the light-emitting structure layer 30 in the wide-view light irradiates the first light-blocking layer 50 and is absorbed, resulting in some light not being able to irradiate the color conversion section 601 and be utilized. Therefore, the color conversion efficiency of the color conversion section 601 is low and the light emission efficiency is low.

[0050] This application provides a display panel and a display device, which are intended to solve or improve the above-mentioned technical problems.

[0051] As shown in Figure 2, which is an exemplary top view of a display panel, the display panel may include a display area AA and a non-display area NA located outside the display area AA. The display panel has an array of multiple pixels PX arranged in an array in the display area AA to provide an image. Pixel PX may include a first pixel PX1, a second pixel PX2, and a third pixel PX3. As shown in any of Figures 3 to 18, which are cross-sectional views taken along section line PP in Figure 1, the display panel includes a substrate 10, a light-emitting structure layer 30, a color conversion layer 60, and a reflective layer 62. The light-emitting structure layer 30 is located on one side of the substrate 10 and includes multiple spaced-apart light-emitting units 32a, 32b, and 32c. The color conversion layer 60 is located on the side of the light-emitting structure layer 30 away from the substrate 10. The color conversion layer 60 includes a plurality of spaced color conversion sections 601. The orthographic projection of each color conversion section 601 onto the substrate 10 covers the orthographic projection of its corresponding light-emitting unit 32a, 32b, and 32c onto the substrate 10. The reflective layer 62 is located on the same side of the light-emitting structure layer 30 as the color conversion layer 60 and includes a plurality of reflective elements 621. Each reflective element 621 is correspondingly disposed to one of the light-emitting units 32a, 32b, and 32c. The extending direction of the reflective element 621 intersects the extending direction of the plane on which the substrate 10 is located. At least part of the light emitted by the light-emitting units 32a, 32b, and 32c is directed toward the corresponding reflective element 621 and reflected to the color conversion section 601 corresponding to the light-emitting units 32a, 32b, and 32c.

[0052] This application provides a reflective layer 62 on the side of the light-emitting structure layer 30 near the color conversion layer 60. A portion of the wide-viewing-angle light emitted by the light-emitting structure layer 30 is converted into reflected light after striking the corresponding reflective element 621. This reflected light is then reflected by the reflective layer 62 to the color conversion section 601 corresponding to the light-emitting units 32a, 32b, and 32c. This allows more light to enter the color conversion section 601, increasing the probability of activating the color conversion material in the color conversion section 601, improving the color conversion efficiency of the color conversion section 601, and also enhancing the utilization rate of the light emitted by the light-emitting structure layer 30.

[0053] In some embodiments, each light-emitting unit 32a, 32b, and 32c of the light-emitting structure layer 30 includes a first light-emitting unit 32a, a second light-emitting unit 32b, and a third light-emitting unit 32c. Each color conversion section 601 of the color conversion layer 60 includes a first color conversion section 601a, a second color conversion section 601b, and a transmissive section 601c. The orthographic projection of the first color conversion section 601a onto the substrate 10 covers the orthographic projection of its corresponding first light-emitting unit 32a onto the substrate 10; the orthographic projection of the second color conversion section 601b onto the substrate 10 covers the orthographic projection of its corresponding second light-emitting unit 32b onto the substrate 10; and the orthographic projection of the transmissive section 601c onto the substrate 10 covers the orthographic projection of its corresponding third light-emitting unit 32c onto the substrate 10.

[0054] In some embodiments, the first light-emitting unit 32a, the second light-emitting unit 32b, and the third light-emitting unit 32c all emit light of a third color. The first color conversion unit 601a and the second color conversion unit 601b both include quantum dots and scatterers. The first color conversion unit 601a in the color conversion layer 60 can convert the third-color light emitted by the corresponding first light-emitting unit 32a in the light-emitting structure layer 30 into first-color light for emission. The second color conversion unit 601b in the color conversion layer 60 can convert the third-color light emitted by the corresponding second light-emitting unit 32b in the light-emitting structure layer 30 into second-color light for emission. The transmission unit 601c in the color conversion layer 60 can transmit the third-color light emitted by the corresponding third light-emitting unit 32c in the light-emitting structure layer 30. In one example, the first color is red, the second color is green, and the third color is blue.

[0055] In some embodiments, the reflective layer 62 includes a first reflective element 621a, a second reflective element 621b, and a third reflective element 621c. The first reflective element 621a is disposed corresponding to the first light-emitting unit 32a, and is used to receive wide-viewing-angle light emitted by the first light-emitting unit 32a and reflect the light to the first color conversion unit 601a. ​​The second reflective element 621b is disposed corresponding to the second light-emitting unit 32b, and is used to receive wide-viewing-angle light emitted by the second light-emitting unit 32b and reflect the light to the second color conversion unit 601b. The third reflective element 621c is disposed corresponding to the third light-emitting unit 32c, and is used to receive wide-viewing-angle light emitted by the third light-emitting unit 32c and reflect the light to the transmission unit 601c. It should be noted that, depending on actual needs, this application may also provide the first reflective element 621a and the second reflective element 621b only at the positions corresponding to the first color conversion unit 601a and the second color conversion unit 601b, respectively, to reduce material costs.

[0056] In some embodiments, the extending direction of the reflective element 621 intersects the extending direction of the plane containing the substrate. The plane containing the substrate can be understood as the plane of the side surface of the substrate facing the light-emitting structure layer, i.e., the light-emitting surfaces of the light-emitting units 32a, 32b, and 32c. Exemplarily, as shown in FIG3, the extending direction of the reflective element 621 and the light-emitting surfaces of its corresponding light-emitting units 32a, 32b, and 32c form an angle α, which is not equal to 0. Preferably, the angle α is less than 90°.

[0057] In some embodiments, the reflective element 621 is made of metal. Exemplarily, the reflective element 621 may be made of similar reflective metals such as aluminum (Al), silver (Ag), gold (Au), copper (Cu), titanium (Ti), chromium (Cr), or nickel (Ni), and may be a single layer or multiple layers. In one example, the reflective element 621 is a Ti-Al-Ti stacked metal structure.

[0058] In some embodiments, the substrate 10 may be a flexible substrate or a rigid substrate. The material of the flexible substrate may include one or more of polyimide, polyethylene terephthalate, polycarbonate, and organic resin materials, such as epoxy resin, triazine, silicone resin, or polyimide. The rigid substrate includes any one of glass substrates, quartz substrates, sapphire substrates, etc.

[0059] In some embodiments, each light-emitting unit 32 includes a first electrode 321, a light-emitting layer 322 located on the side of the first electrode 321 away from the substrate 10, and a second electrode 323 located on the side of the light-emitting layer 322 away from the substrate 10. One of the first electrode 321 and the second electrode 323 is an anode, and the other is a cathode. In the figure, the first electrode 321 is the anode, the second electrode 323 is the cathode, the cathode is a common electrode, and the cathodes of all light-emitting units are connected to form a surface electrode. In some embodiments, the light-emitting layer 322 is an organic light-emitting layer, and the light emitted by each light-emitting unit can be blue light or green light.

[0060] In some embodiments, the light-emitting layer 322 may have the shape of a continuous film. The light-emitting layer 322 may include multiple layers that can be stacked. In some embodiments, as shown in FIG4(a), the light-emitting layer 322 may include a first hole transport layer HTL1 located on the first electrode 321, a first light-emitting material layer EML1 located on the first hole transport layer HTL1, and a first electron transport layer ETL1 located on the first light-emitting material layer EML1. The first light-emitting material layer EML1 may be a blue light-emitting layer. In other embodiments, as shown in FIG4(b), in addition to the first hole transport layer HTL1, the first light-emitting material layer EML11, and the first electron transport layer ETL1, the light-emitting layer may also include a first charge generation layer CGL1 located on the first light-emitting material layer EML11 and a second light-emitting material layer EML12 located on the first charge generation layer CGL1. The first electron transport layer ETL1 may be located on the second light-emitting material layer EML12. The second light-emitting material layer EML12 may emit blue light similarly to the first light-emitting material layer EML11. The second luminescent material layer EML12 can emit blue light with the same peak wavelength as or a different peak wavelength from the first luminescent material layer EML11. The first luminescent material layer EML11 and the second luminescent material layer EML12 can emit light of different colors. For example, the first luminescent material layer EML11 can emit blue light, and the second luminescent material layer EML12 can emit green light. In some embodiments, as shown in FIG4(c), in addition to the first hole transport layer HTL1, the first luminescent material layer EML11, the first charge generation layer CGL11, the second luminescent material layer EML12, and the first electron transport layer ETL1, the luminescent layer may also include a second charge generation layer CGL12 located on the second luminescent material layer EML12 and a third luminescent material layer EML13 located on the second charge generation layer CGL12. The third luminescent material layer EML13 can emit blue light with the same peak wavelength as or a different peak wavelength from the first luminescent material layer EML11 and the second luminescent material layer EML12. The first luminescent material layer EML11, the second luminescent material layer EML12, and the third luminescent material layer EML13 can emit light of the same or different colors. For example, the first luminescent material layer EML11 can emit blue light, the second luminescent material layer EML12 can emit green light, and the third luminescent material layer EML13 can emit blue light. A structure with two or more luminescent material layers can improve the luminous efficiency and lifetime of the light-emitting unit. Those skilled in the art can adjust the number of luminescent material layers as needed; this application is not limited to this.

[0061] In some embodiments, as shown in FIG3, the display panel further includes a driving circuit layer 20 located between the substrate 10 and the light-emitting structure layer 30. The driving circuit layer 20 includes a plurality of pixel circuits, which are used to drive the light-emitting units 32. The pixel circuits and the light-emitting units 32 can correspond one-to-one, and each pixel circuit is used to drive the corresponding light-emitting unit 32.

[0062] In some embodiments, the pixel circuit may include a thin-film transistor 21 and a capacitor 22. The thin-film transistor 21 may include an active layer 211, a gate 212, a first electrode 213, and a second electrode 214. One of the first electrode 213 and the second electrode 214 is the source, and the other is the drain. The capacitor 22 includes a first electrode plate 221 and a second electrode plate 222 disposed opposite to each other. The pixel circuit layer may also include multiple signal lines, such as scan signal lines, data signal lines, power signal lines, etc. (not shown in the figure).

[0063] In some embodiments, the gate 212 and the first electrode 221 of the capacitor 22 are located on the same layer, the second electrode 222 of the capacitor 22 is located on the side of the first electrode 221 away from the substrate 10, and the first electrode 213 and the second electrode 214 of the thin-film transistor 21 are located on the same layer, and on the side of the second electrode 222 away from the substrate 10. The driving circuit layer 20 also includes a second insulating layer 25 located between the active layer 211 and the gate 212, a third insulating layer 26 located between the gate 212 and the second electrode 222, an interlayer dielectric layer 27 located between the second electrode 222 and the first electrode 213, and a first planarization layer 28 located between the first electrode 213 and the first electrode 321. The first electrode 321 is electrically connected to the second electrode 214 through a via penetrating the first planarization layer 28, and the first electrode 213 and the second electrode 214 are in contact with the active layer 211 through vias penetrating the interlayer dielectric layer 27, the third insulating layer 26, and the second insulating layer 25, respectively.

[0064] It should be noted that the top-gate thin-film transistor in this embodiment is an exemplary embodiment. The thin-film transistor 21 in this application can also be a bottom-gate thin-film transistor or a dual-gate thin-film transistor.

[0065] In some embodiments, the display panel further includes a light-shielding layer 23 disposed on the side of the substrate 10 near the thin-film transistor 21. The light-shielding layer 23 can prevent external ambient light from reaching the active layer 211 of the thin-film transistor 21, thereby preventing degradation of the active layer 211. The material of the light-shielding layer 23 may include metals such as copper (Cu), aluminum (Al), molybdenum (Mo), titanium (Ti), or tungsten (W), and may be a single layer or multiple layers.

[0066] In some embodiments, the display panel further includes a first insulating layer 24 located between the light-shielding layer 23 and the active layer 211 to prevent direct contact between the two.

[0067] In some embodiments, the display panel is further provided with a buffer layer (not shown in the figure). The buffer layer can be disposed between the substrate 10 and the light-shielding layer 23, which can flatten the surface of the substrate 10 near the thin film transistor 21 to reduce the stress on the active layer 211 and improve structural stability.

[0068] In some embodiments, a third planarization layer 90 is further provided on the side of the filter layer 82 away from the substrate 10.

[0069] In some embodiments, the light-emitting structure layer 30 further includes a pixel defining layer 31, which has a plurality of pixel openings 31a. The pixel defining layer 31 is located on the side of the first electrode 321 away from the substrate 10. The pixel openings 31a correspond one-to-one with the light-emitting units 32a, 32b, and 32c, and each pixel opening 31a exposes at least a portion of the corresponding first electrode 321. At least a portion of the light-emitting layer 322 of each light-emitting unit 32a, 32b, and 32c is located within the pixel opening 31a. At least a portion of the second electrode 323 is located on the side of the pixel defining layer 31 away from the substrate 10. Each pixel opening 31a defines the light-emitting area of ​​the corresponding light-emitting unit 32a, 32b, and 32c; specifically, the area defined by the pixel opening 31a facing the bottom surface of the substrate 10 is the light-emitting area of ​​the light-emitting unit 32a, 32b, and 32c.

[0070] In some embodiments, the display panel further includes spacers 33 disposed on the side of the pixel defining layer 31 away from the substrate 10 to enhance the support of the display panel. In some embodiments, the spacers 33 may be omitted.

[0071] In some embodiments, as shown in FIG3, the display panel further includes an encapsulation layer 40 located on the side of the light-emitting structure layer 30 away from the substrate 10. Further, the encapsulation layer 40 may include a first inorganic encapsulation layer 41, an organic encapsulation layer 42, and a second inorganic encapsulation layer 43 stacked together.

[0072] In some embodiments, as shown in FIG3, the display panel further includes a dam layer 61, which is located on the same side of the light-emitting structure layer 30 as the reflective layer 62. The dam layer 61 is provided with a plurality of dam patterns 610 and a plurality of first openings 61a arranged at intervals defined by the dam patterns 610. Each first opening 61a is filled with at least a portion of a color conversion part 601. The dam patterns 610 are also provided with a plurality of second openings 61b, which are located between two adjacent first openings 61a in the direction from the substrate 10 to the light-emitting structure layer 30. The cross-section of the second openings 61b of the dam patterns 610 is an inverted trapezoid. The reflective element 621 is located on the sidewall between the dam patterns 610 and the second openings 61b.

[0073] Furthermore, the color conversion section 610 and the second inorganic encapsulation layer 43, which is furthest from the substrate 10 in the encapsulation layer 40, are in direct contact.

[0074] In this embodiment, by setting a second opening 61b, multiple reflective elements 621 in the reflective layer 62 cover the sidewall between the dam pattern 610 and the second opening 61b, thereby enabling the wide-viewing-angle light emitted by the light-emitting units 32a, 32b and 32c in the light-emitting structure layer 30 to enter the color conversion layer 60 after being reflected by the reflective elements 621. This increases the probability of the color conversion material in the color conversion layer 60 being excited, improves the color conversion efficiency, and further enhances the light utilization rate.

[0075] In some embodiments, the area enclosed by the orthographic projection of the reflective element 621 on the substrate 10 covers the orthographic projections of its corresponding light-emitting units 32a, 32b, and 32c on the substrate 10, and the orthographic projection of the reflective element 621 on the substrate 10 is annular. For example, as shown in FIG. 5, if the area enclosed by the orthographic projection of the first reflective element 621a on the substrate 10 covers its corresponding first light-emitting unit 32a, then the area covered by the light beam emitted by the light-emitting unit towards the side surface of the dam layer 61 near the substrate 10 can fall into the area enclosed by the orthographic projection of the reflective element 621a on the substrate 10. This allows the light emitted by the light-emitting unit 32a to be fully reflected by the reflective element 621a and then enter the corresponding first color conversion section 601a for utilization. In some embodiments, as shown in FIG3, the two intersection points a1 and a2 on the cross-sectional view of the surface of the second inorganic encapsulation layer 43 on the side away from the substrate 10 when the light emitted by the first light-emitting unit 32a at the maximum angle is the boundary point of the two second openings 61b on both sides of the first opening 61a corresponding to the first light-emitting unit 32a near the first light-emitting unit 32a on this cross-section.

[0076] In some embodiments, as shown in FIG3, the orthographic projection of the surface of the first opening 61a near the substrate 10 onto the substrate 10 covers the orthographic projection of the opening surface of the corresponding pixel opening 31a away from the substrate 10 onto the substrate 10. This allows the first opening 61a to fully receive the light emitted from each of the light-emitting units 32a, 32b, and 32c and convert the light incident on the color conversion unit 601 into the corresponding desired emitted light.

[0077] In some embodiments, a third inorganic encapsulation layer 71 is further provided on the side of the color conversion layer 60 away from the substrate 10. The third inorganic encapsulation layer 71 is used to isolate the color conversion part 601 from the external environment and to provide a certain degree of protection for the color conversion part 601. In some examples, as shown in FIG3, the third inorganic encapsulation layer 71 is disposed on the side of the reflective layer 62 away from the substrate. In other examples, the third inorganic encapsulation layer 71 is disposed between the reflective layer 62 and the color conversion layer 60 (not shown in the figure).

[0078] In some embodiments, as shown in FIG3 or FIG6, an organic material layer 51, a second planarization layer 72, a second light-blocking layer 81, and a filter layer 82 are sequentially disposed on the side of the third inorganic encapsulation layer 71 away from the substrate 10. The filter layer 82 includes a plurality of spaced-apart filter portions 82a, 82b, and 82c. The second light-blocking layer 81 has a plurality of light-shielding openings, each light-shielding opening being used to accommodate at least a portion of its corresponding filter portion 82a, 82b, and 82c. The orthographic projection of each filter portion 82a, 82b, and 82c on the substrate 10 covers the orthographic projection of its corresponding light-emitting unit 32a, 32b, and 32c on the substrate 10. The filter layer 82 can further filter the light to allow the corresponding light to exit, avoiding interference from light of different wavelengths.

[0079] In some embodiments, as shown in FIG3, the organic material layer 51 can be made of a light-shielding material. The light-shielding material can be a polymer material doped with black pigment or particles. Exemplarily, the organic material layer 51 can be reused as a first light-blocking layer 50.

[0080] In some embodiments, as shown in FIG6, the organic material layer 51 may be made of a light-transmitting material. The light-transmitting material may include organic materials such as acrylic, benzocyclobutene (BCB), or hexamethyldisiloxane (HMDSO). Exemplarily, the organic material layer 51 may be reused as a second planarization layer 72.

[0081] In some embodiments, as shown in FIG7, a second light-blocking layer 81 and a light-filtering layer 82 are sequentially disposed on the side of the third inorganic encapsulation layer 71 away from the substrate 10. At least a portion of the second light-blocking layer 81 fills the second opening 61b, and the light-filtering layer 82 directly covers the surface of the third inorganic encapsulation layer 71 away from the substrate 10 corresponding to the area where each color conversion section 601 is located. In this embodiment, the second light-blocking layer 81 and the light-filtering layer 82 are directly disposed on the surface of the third inorganic encapsulation layer 71 away from the substrate 10, eliminating the need for a second planarization layer 72 or a first light-blocking layer 50, thereby further reducing the number of masks used in the fabrication process and simplifying the fabrication process.

[0082] In some embodiments, as shown in any of Figures 3, 6, and 7, the smaller angle α of the inclination angle of the sidewall of the second opening 61b is greater than or equal to 45° and less than 90°. That is, the reflective element 621 has a reflective surface near the side of its corresponding light-emitting units 32a, 32b, and 32c, and the angle between the reflective surface and the light-emitting surface of its corresponding light-emitting units 32a, 32b, and 32c is greater than or equal to 45° and less than 90°. This helps the reflected light to more easily enter the color conversion section 601 to excite more quantum dots, thereby improving the color conversion rate and light utilization rate.

[0083] In some embodiments, as shown in any of Figures 8 to 10, the dam layer 61 and the reflective layer 62 are located on the same side of the light-emitting structure layer 30. The dam layer 61 includes a plurality of dam patterns 610 and a plurality of first openings 61a spaced apart by the dam patterns 610. Each first opening 61a is filled with at least a portion of the color conversion part 610. The cross-section of the first opening 61a is trapezoidal along the direction from the substrate 10 to the light-emitting structure layer 30. The reflective element 621 is disposed on the sidewall of the first opening 61a.

[0084] In this embodiment, by directly forming multiple trapezoidal first openings 61a, and directly forming reflective elements 621 on the sidewalls of the first openings 61a, the sidewalls of the first openings 61a in the dam layer 61 of this embodiment can be used as a supporting structure for forming the reflective elements 621, so that the reflective elements 621 are attached to the sidewalls of the first openings 61a. The first openings 61a can be prepared by an exposure and development process, resulting in the opening shape of the first openings 61a. The reflective elements 621 can be formed by a photolithography process, specifically including depositing a thin film and then patterning it by etching to form the reflective elements 621.

[0085] In some embodiments, after the reflective element 621 is formed on the sidewall of the first opening 61a, the corresponding color conversion part 601 can be filled into each first opening 61a, and the color conversion part 601 directly contacts the reflective element 621. In this embodiment, the first opening 61a can be used to fill the color conversion part 601, and the reflective element can be directly formed on the sidewall of the first opening 61a, which omits the step of forming the second opening 61b in the aforementioned embodiments, further simplifying the manufacturing process and improving manufacturing efficiency.

[0086] In some embodiments, the orthographic projection of the surface of the first opening 61a near the substrate 10 onto the substrate 10 covers the orthographic projection of its corresponding light-emitting units 32a, 32b, and 32c onto the substrate 10, and the orthographic projection of the reflective element 621 onto the substrate 10 is annular. For example, as shown in FIG6, similar to the previous embodiment, the two intersection points b1 and b2 on the cross-sectional view of the surface of the second inorganic encapsulation layer 43 on the side away from the substrate 10, where the light emitted by the first light-emitting unit 32a at the maximum angle is incident, are the two boundary points of the second groove corresponding to the first light-emitting unit 32a on that cross-section.

[0087] In some embodiments, as shown in FIG8, a first opening 61a penetrates through a dam layer 61, the dam layer 61 being made of a light-shielding material. The light-shielding material further prevents crosstalk between adjacent light rays.

[0088] In some embodiments, as shown in FIG9, the first opening 61a penetrates the dam layer 61, and the dam layer 61 is made of a light-transmitting material, which may be an organic material layer 51. In this embodiment, while the dam layer 61 is made of a light-transmitting material, a second light-blocking layer 81 can be used to define the area between the various color conversion parts 601 in the color conversion layer 60 to avoid light crosstalk.

[0089] In some embodiments, as shown in FIG10, along the direction from the substrate 10 to the light-emitting structure layer 30, the depth h1 of the first opening 61a is less than the maximum thickness h2 of the dam layer 61, and the dam layer 61 is made of a light-transmitting material. The dam layer 61 protects the side of the second inorganic encapsulation layer 43 away from the substrate 10, thereby preventing excessive etching during the fabrication process from damaging the second inorganic encapsulation layer 43 and improving the moisture barrier properties of the display panel.

[0090] In some embodiments, as shown in FIG11, the display panel further includes an encapsulation layer 40 located on the side of the light-emitting structure layer 30 away from the substrate 10, the encapsulation layer 40 including an organic encapsulation layer 42, the organic encapsulation layer 42 being reused as a dam layer 61.

[0091] In this embodiment, by reusing the organic encapsulation layer 42 as the dam layer 61, that is, the organic encapsulation layer 42 and the dam layer 61 are an integral structure, the space in the organic encapsulation layer 42 can be used to form the color conversion layer 60 and the reflective layer 62, which can further reduce the overall thickness of the display panel.

[0092] In some embodiments, as shown in any of Figures 8 to 11, a second planarization layer 72 is provided on the side of the second encapsulation layer 40 away from the substrate 10. Forming a flat surface facilitates the further formation of the second light-blocking layer 81 and the filter layer 82.

[0093] In some embodiments, as shown in any of Figures 8 to 11, the smaller angle β of the inclination angle of the sidewall of the second groove is greater than or equal to 45° and less than 90°. That is, the reflective element 621 has a reflective surface near the side of its corresponding light-emitting units 32a, 32b, and 32c, and the angle between the reflective surface and the light-emitting surface of its corresponding light-emitting units 32a, 32b, and 32c is greater than or equal to 45° and less than 90°. This helps the reflected light to more easily enter the color conversion section 601 to excite more quantum dots, thereby improving the color conversion rate and light utilization rate.

[0094] In some embodiments, as shown in any of the figures 12 to 20, the display panel further includes an encapsulation layer 40 located on the side of the light-emitting structure layer 30 away from the substrate 10. The encapsulation layer 40 includes an organic encapsulation layer 42, and the reflective layer 62 is located within the organic encapsulation layer 42.

[0095] In this embodiment, the reflective layer 62 is disposed within the organic encapsulation layer 42, thereby utilizing the space within the organic encapsulation layer 42 and using the organic encapsulation layer 42 structure as a carrier for forming the reflective element 621, which can further reduce the overall thickness of the display panel.

[0096] In some embodiments, as shown in FIG12, the organic encapsulation layer 42 includes a first organic encapsulation layer 421 located on the side of the light-emitting structure layer 30 away from the substrate 10. The first organic encapsulation layer 421 is provided with a plurality of spaced first protrusions 4211. The orthographic projection of each first protrusion 4211 on the substrate 10 covers the orthographic projection of a color conversion part 601 on the substrate 10. Along the direction from the substrate 10 to the light-emitting structure layer 30, the cross-section of the first protrusion 4211 gradually decreases, and the cross-section is parallel to the surface of the substrate 10 facing the light-emitting structure layer 30. Each reflective element 621 is disposed on the sidewall of the corresponding first protrusion 4211.

[0097] In this embodiment, by providing a first organic encapsulation layer 421 with a first protrusion 4211 inside the organic encapsulation layer 42, a reflective element 621 with a corresponding tilt angle can be formed on the sidewall of the first organic encapsulation layer 421 to meet the requirement that light enters the reflective element 621 from the light-emitting units 32a, 32b and 32c and is then reflected to the corresponding color conversion part 601.

[0098] In some embodiments, the orthographic projection of the first protrusion 4211 on the substrate 10 covers the orthographic projections of its corresponding light-emitting units 32a, 32b, and 32c on the substrate. The enclosed areas of the orthographic projections of the first reflective element 621a, the second reflective element 621b, and the third reflective element 621c on the substrate 10 respectively cover the orthographic projections of their corresponding light-emitting units 32a, 32b, and 32c on the substrate 10. The orthographic projections of the first reflective element 621a, the second reflective element 621b, and the third reflective element 621c on the substrate 10 are all annular. Further, the orthographic projection of the first protrusion 4211 on the substrate 10 covers the orthographic projection of the light beams emitted by the corresponding light-emitting units 32a, 32b, and 32c towards the side surface of the first protrusion closest to the substrate 10. This allows the light emitted by the light-emitting units 32a, 32b, and 32c to be fully reflected by the reflective element 621 and then enter the corresponding color conversion unit 601 for utilization. In some examples, as shown in Figure 12, the two intersection points c1 and c2 on the cross-sectional view of the surface of the first protrusion 4211 on the side away from the substrate 10 when the light emitted by the first light-emitting unit 32a at the maximum angle is the two boundary points of the first protrusion 4211 on the cross-section of the first light-emitting unit 32a.

[0099] In some embodiments, as shown in FIG12 or FIG13, the display panel further includes a second organic encapsulation layer 422 located on the side of the first organic encapsulation layer 421 away from the substrate 10, and the side surface of the color conversion part 601 near the substrate 10 is in contact with the first organic encapsulation layer 421 or the second organic encapsulation layer 422.

[0100] In this embodiment, a second organic encapsulation layer 422 is provided to perform planarization after the formation of the reflective layer 62, so as to maintain the relative flatness of the film layer when the color conversion layer 60 is subsequently formed.

[0101] In some examples, as shown in FIG12, the display panel further includes a second organic encapsulation layer 422 located on the side of the first organic encapsulation layer 421 away from the substrate 10, and the surface of the color conversion section 601 near the substrate 10 contacts the second organic encapsulation layer 422. The surface of the second organic encapsulation layer 422 on the side away from the substrate 10 is substantially planar.

[0102] In some examples, as shown in FIG13, the display panel further includes a second organic encapsulation layer 422 located on the side of the first organic encapsulation layer 421 away from the substrate 10, and the surface of the color conversion portion 601 near the substrate 10 contacts the first organic encapsulation layer 421. The second organic encapsulation layer 422 completely fills the recess of the first organic encapsulation layer 421.

[0103] In some embodiments, as shown in FIG14, the display panel further includes a second organic encapsulation layer 422 located on the same side of the light-emitting structure layer 30 as the first organic encapsulation layer 421, and the second organic encapsulation layer 422 is in contact with the first inorganic encapsulation layer 41. In this embodiment, the first organic encapsulation layer 421 and the second organic encapsulation layer 422 are disposed in the same layer, which can further reduce the overall thickness of the display panel and achieve a thinner and lighter display panel.

[0104] In some embodiments, as shown in FIG15, the first organic encapsulation layer 421 has a recess 4212, the orthographic projection of the recess on the substrate 10 does not overlap with the orthographic projection of the first protrusion on the substrate 10, and the first organic encapsulation layer 421 is further provided with a first light blocking layer 50 on the side away from the substrate 10, at least a portion of the first light blocking layer 50 is located in the recess 4212.

[0105] In this embodiment, by directly filling the recessed portion 4212 with the first light-blocking layer 50, the second organic encapsulation layer 422 can be eliminated, which can further reduce the number of times the mask is used in the preparation process, reduce material costs, simplify process steps, and improve preparation efficiency.

[0106] In some embodiments, as shown in FIG16, the display panel further includes a first inorganic encapsulation layer 41 located on the side of the organic encapsulation layer 42 near the substrate 10, and a first light blocking layer 50 is in contact with the first inorganic encapsulation layer 41.

[0107] In this embodiment, the first organic encapsulation layer 421 is further thinned to make the display panel thinner and lighter.

[0108] In some embodiments, as shown in FIG17, the organic encapsulation layer 42 includes a first organic encapsulation layer 421 located on the side of the light-emitting structure layer 30 away from the substrate 10. The first organic encapsulation layer 421 has a plurality of spaced third openings 4213. The orthographic projection of each third opening 4213 on the substrate 10 covers the orthographic projection of a color conversion part 601 on the substrate 10. The cross-section of the third opening 4213 is trapezoidal along the direction from the substrate 10 to the light-emitting structure layer 30. Each reflective element 621 is disposed on the sidewall of the corresponding third opening 4213.

[0109] Similarly to the previous embodiment, in this embodiment, a first organic encapsulation layer 421 is provided and a third opening 4213 is provided in the first organic encapsulation layer 421. A reflective element 621 can be formed on the sidewall of the third opening 4213 to improve the light utilization rate.

[0110] In some embodiments, the orthographic projection of the side surface of the third opening 4213 near the substrate 10 onto the substrate 10 covers the orthographic projections of the corresponding light-emitting units 32a, 32b, and 32c onto the substrate 10. The enclosed areas of the orthographic projections of the first reflective element 621a, the second reflective element 621b, and the third reflective element 621c onto the substrate 10 respectively cover the orthographic projections of the corresponding light-emitting units 32a, 32b, and 32c onto the substrate 10. The orthographic projections of the first reflective element 621a, the second reflective element 621b, and the third reflective element 621c onto the substrate 10 are all annular. Further, the orthographic projection of the third opening 4213 onto the substrate 10 covers the orthographic projection of the area of ​​the light beams emitted by the corresponding light-emitting units 32a, 32b, and 32c towards the side surface of the third opening 4213 near the substrate 10 onto the substrate 10. This allows the light emitted by the light-emitting units 32a, 32b, and 32c to be fully reflected by the reflective element 621 and then enter the corresponding color conversion section 601 for utilization. In some examples, as shown in Figure 17, the two intersection points d1 and d2 of the surface of the third opening 4213 on the side away from the substrate 10 when the light emitted by the first light-emitting unit 32a at the maximum angle is incident on the cross-section of the cross-section are the two boundary points of the third opening 4213 corresponding to the first light-emitting unit 32a near the first light-emitting unit 32a.

[0111] In some embodiments, as shown in Figures 17 and 18, the display panel further includes a second organic encapsulation layer 422 located on the side of the first organic encapsulation layer 421 away from the substrate 10. The side of the organic encapsulation layer 42 away from the substrate 10 is also provided with a first light blocking layer 50. The surface of the first light blocking layer 50 near the substrate 10 is in contact with the first organic encapsulation layer 421 or the second organic encapsulation layer 422.

[0112] In some embodiments, as shown in FIG17, the surface of the first light-blocking layer 50 near the substrate 10 is in contact with the second organic encapsulation layer 422.

[0113] In some embodiments, as shown in FIG18, the surface of the first light-blocking layer 50 near the substrate 10 is in contact with the first organic encapsulation layer 421.

[0114] In some embodiments, as shown in FIG19 or FIG20, when the reflective layer 62 is located between the light-emitting structure layer 30 and the color conversion layer 60, the extension direction of the plurality of reflective elements 621 of the reflective layer 62 can be perpendicular to each other with the extension direction of the light-emitting surface of the corresponding light-emitting unit 32a, 32b and 32c. That is, the angle γ between the reflective surface of the reflective element 621 on the side close to its corresponding light-emitting unit and the plane where the substrate 10 is located can be about 90°. As long as the light emitted from the light-emitting units 32a, 32b and 32c can be reflected by the reflective element 621 and enter the color conversion part 601, it is acceptable.

[0115] It should be noted that the term "about" and similar terms used in this application are used as approximate terms rather than as terms of degree, and are intended to allow for inherent deviations in measured or calculated values ​​that will be recognized by those skilled in the art. For example, "the included angle γ may be about 90°" in this application can be understood as the included angle γ being between 85° and 95°, specifically 85°, 86°, 87°, 88°, 89°, 90°, 91°, 92°, 93°, 94°, and 95°.

[0116] Based on the same inventive concept, this application also provides a display device, including a display panel and a housing as described in the foregoing embodiments. It should be noted that the display device can be any device that displays images, whether moving (e.g., video) or fixed (e.g., still images), and whether it contains text or other visual information. For example, the display device can include portable electronic devices such as mobile phones, smartphones, tablet PCs, mobile communication terminals, e-notebooks, e-book readers, portable multimedia players, navigation devices, and ultra-mobile PCs, as well as televisions, laptops, monitors, advertising panels, and Internet of Things (IoT) devices. The display device can also be used in wearable devices such as smartwatches, watch phones, and glasses-type displays. The display device can also be used as a vehicle dashboard, a central information display (CID) of a vehicle's center fascia or dashboard, an interior mirror display replacing a vehicle's side mirrors, and a display arranged or mounted on the rear side of the front seat for use as an entertainment device for rear-seat passengers.

[0117] Based on the same inventive concept, this application also provides a method for manufacturing a display panel, as shown in Figure 3, including the following steps:

[0118] Step 100: A dam layer film is formed on the side of the light-emitting structure layer 30 away from the substrate 10. The dam layer film is patterned to form a dam layer 61. The dam layer 61 is provided with a plurality of dam patterns 610 and a plurality of first openings 61a arranged at intervals defined by the dam patterns 610. The dam layer 61 is also provided with a plurality of second openings 61b. The second openings 61b are located between two adjacent first openings 61a. Along the direction from the substrate 10 to the light-emitting structure layer 30, the cross-section of the second opening 61b of the dam pattern 610 is an inverted trapezoid.

[0119] Step 200; Form a reflective layer 62 on the sidewall between the dam pattern 610 and the second opening 61b;

[0120] Step 300: Form a color conversion layer 60 within the first opening 61a of the dam layer 61;

[0121] Step 400: Form a third inorganic encapsulation layer 71 on the side of the dam layer 61 and the color conversion layer 60 away from the substrate 10;

[0122] Step 500: A first light-blocking layer 50 is formed on the side of the third inorganic encapsulation layer 71 away from the substrate 10.

[0123] In this embodiment, a bearing surface for forming a reflective layer 62 can be provided by first forming a dam layer 61, so as to facilitate the formation of multiple reflective elements 621 in the reflective layer 62.

[0124] Based on the same inventive concept, this application also provides another method for manufacturing a display panel, as shown in Figure 8, including the following steps:

[0125] Step 100: A first light blocking layer 50 is formed on the side of the light-emitting structure layer 30 away from the substrate 10. The first light blocking layer 50 includes a plurality of spaced first openings 61a. The cross-section of the first opening 61a is trapezoidal along the direction from the substrate 10 to the light-emitting structure layer 30.

[0126] Step 200: Form a reflective layer 62 on the sidewall of the first opening 61a;

[0127] Step 300: Fill the first opening 61a with the color conversion part 601;

[0128] Step 400: A third inorganic encapsulation layer 71 is formed on the side of the first light blocking layer 50 and the color conversion part 601 away from the substrate 10.

[0129] In this embodiment, the first light-blocking layer 50 is directly used as the carrier structure for forming the reflective layer 62, which makes the preparation steps simpler and can further simplify the process.

[0130] Based on the same inventive concept, this application also provides another method for manufacturing a display panel, as shown in Figure 12, including the following steps:

[0131] Step 100: A first organic encapsulation layer 421 is formed on the side of the light-emitting structure layer 30 away from the substrate 10. The first organic encapsulation layer 421 is provided with a plurality of spaced first protrusions 4211. Along the direction from the substrate 10 to the light-emitting structure layer 30, the cross-section of the first protrusion 4211 gradually decreases and the cross-section is parallel to the surface of the substrate 10 facing the light-emitting structure layer 30.

[0132] Step 200: Form a reflective layer 62 on the sidewall of each first protrusion 4211;

[0133] Step 300: Form a second organic encapsulation layer 422 on the side of the reflective layer 62 away from the substrate 10;

[0134] Step 400: A first light blocking layer 50 and a color conversion layer 60 are sequentially formed on the side of the second organic encapsulation layer 422 away from the substrate 10. The orthogonal projection of each first protrusion 4211 on the substrate 10 covers the orthogonal projection of a color conversion part 601 on the substrate 10.

[0135] In this embodiment, the reflective layer 62 is disposed in the organic encapsulation layer 42, which can further reduce the overall thickness of the display panel. Furthermore, the positions of each reflective element 621 of the reflective layer 62 are no longer limited by the position of the first light blocking layer 50, and the positions can be set more flexibly.

[0136] Based on the same inventive concept, this application also provides another method for manufacturing a display panel, as shown in Figure 15, including the following steps:

[0137] Step 100: A first organic encapsulation layer 421 is formed on the side of the light-emitting structure layer 30 away from the substrate 10. The first organic encapsulation layer 421 has a plurality of spaced third openings 4213. The openings of the third openings 4213 are gradually narrowed along the direction from the substrate 10 to the light-emitting structure layer 30.

[0138] Step 200: Form a reflective layer 62 on the sidewall of each of the third openings 4213;

[0139] Step 300: Form a second organic encapsulation layer 422 on the side of the reflective layer 62 away from the substrate 10;

[0140] Step 400: A first light-blocking layer 50 and a color conversion layer 60 are sequentially formed on the side of the second organic encapsulation layer 422 away from the substrate 10.

[0141] This embodiment is similar to the previous embodiment. The reflective layer 62 can be disposed in the organic encapsulation layer 42, which can further reduce the overall thickness of the display panel. Furthermore, the position of each reflective element 621 of the reflective layer 62 is no longer limited by the position of the first light blocking layer 50, and the position can be set more flexibly.

[0142] It should be understood that the embodiments described herein should be considered in a descriptive sense only and not for limiting purposes. The description of features or aspects within each embodiment should generally be considered as other similar features or aspects that may be used in other embodiments. Although one or more embodiments have been described with reference to the accompanying drawings, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope defined by the claims and their equivalents.

Claims

1. A display panel, characterized in that, include: Substrate; A light-emitting structure layer is located on one side of the substrate, and the light-emitting structure layer includes a plurality of light-emitting units arranged at intervals; A color conversion layer is located on the side of the light-emitting structure layer away from the substrate. The color conversion layer includes a plurality of spaced color conversion parts. The orthographic projection of each color conversion part on the substrate covers the orthographic projection of one of the corresponding light-emitting units on the substrate. The reflective layer, located on the same side of the light-emitting structure layer as the color conversion layer, includes multiple reflective elements. Each reflective element is correspondingly disposed with one light-emitting unit. The extending direction of the reflective element intersects with the extending direction of the plane where the substrate is located. At least a portion of the light emitted by the light-emitting unit is directed toward the reflective element corresponding to it and is reflected to the color conversion part corresponding to the light-emitting unit.

2. The display panel according to claim 1, characterized in that, Also includes: A dam layer, located on the same side of the light-emitting structure layer as the reflective layer, the dam layer comprising a plurality of dam patterns and a plurality of first openings spaced apart by the dam patterns, each first opening being filled with at least a portion of the color conversion portion, the dam patterns further defining a plurality of second openings located between two adjacent first openings in a direction from the substrate toward the light-emitting structure layer, the cross-section of the second openings of the dam patterns being inverted trapezoidal, and the reflective element located on the sidewall between the dam patterns and the second openings.

3. The display panel according to claim 2, characterized in that, The area enclosed by the orthogonal projection of the reflective element on the substrate covers the orthogonal projection of the corresponding light-emitting unit on the substrate, and the orthogonal projection of the reflective element on the substrate is ring-shaped.

4. The display panel according to claim 2, characterized in that, The light-emitting structure layer further includes a pixel defining layer, which has a plurality of pixel openings. Each light-emitting unit is located in one of the corresponding pixel openings. The orthographic projection of the surface of the first opening near the substrate on the substrate covers the orthographic projection of the opening surface of the pixel opening away from the substrate on the substrate.

5. The display panel according to claim 2, characterized in that, On the side of the reflective layer away from the substrate, an inorganic encapsulation layer and an organic material layer are stacked in sequence, wherein the organic material layer includes at least one of a light-transmitting material and a light-shielding material.

6. The display panel according to claim 1, characterized in that, The display panel also includes: A dam layer, wherein the dam layer and the reflective layer are located on the same side of the light-emitting structure layer, the dam layer includes a plurality of dam patterns and a plurality of first openings arranged at intervals defined by the dam patterns, each first opening is filled with at least a portion of the color conversion part, and the cross section of the first opening is trapezoidal along the direction from the substrate to the light-emitting structure layer, and the reflective element is disposed on the sidewall of the first opening.

7. The display panel according to claim 6, characterized in that, The reflective element is in contact with the color conversion part.

8. The display panel according to claim 6, characterized in that, The orthographic projection of the side surface of the first opening near the substrate onto the substrate covers the orthographic projection of the corresponding light-emitting unit onto the substrate. The enclosed area of ​​the orthographic projection of the reflective element onto the substrate covers the orthographic projection of the corresponding light-emitting unit onto the substrate. The orthographic projection of the reflective element onto the substrate is annular.

9. The display panel according to claim 6, characterized in that, The first opening penetrates the dam layer, and the dam layer is made of at least one of light-shielding material and light-transmitting material; Alternatively, along the direction from the substrate to the light-emitting structure layer, the depth of the first opening is less than the maximum thickness of the dam layer, and the dam layer is made of a light-transmitting material.

10. The display panel according to claim 6, characterized in that, The display panel further includes an encapsulation layer located on the side of the light-emitting structure layer away from the substrate, the encapsulation layer including an organic encapsulation layer, the organic encapsulation layer being reused as the dam layer.

11. The display panel according to claim 1, characterized in that, The display panel further includes an encapsulation layer located on the side of the light-emitting structure layer away from the substrate, the encapsulation layer including an organic encapsulation layer, and the reflective layer located within the organic encapsulation layer.

12. The display panel according to claim 11, characterized in that, The organic encapsulation layer includes a first organic encapsulation layer located on the side of the light-emitting structure layer away from the substrate. The first organic encapsulation layer has a plurality of spaced first protrusions. The orthogonal projection of each first protrusion on the substrate covers the orthogonal projection of the color conversion part on the substrate. Along the direction from the substrate to the light-emitting structure layer, the cross-section of the first protrusion gradually decreases, and the cross-section is parallel to the surface of the substrate facing the light-emitting structure layer; each of the reflective elements is disposed on the sidewall of the first protrusion corresponding to it.

13. The display panel according to claim 12, characterized in that, The orthographic projection of the first protrusion on the substrate covers the orthographic projection of its corresponding light-emitting unit on the substrate, and the enclosed area of ​​the orthographic projection of the reflective element on the substrate covers the orthographic projection of its corresponding light-emitting unit on the substrate. The orthographic projection of the reflective element on the substrate is annular.

14. The display panel according to claim 12, characterized in that, The display panel further includes a second organic encapsulation layer located on the side of the first organic encapsulation layer away from the substrate, and the side surface of the color conversion part near the substrate is in contact with the first organic encapsulation layer or the second organic encapsulation layer.

15. The display panel according to claim 12, characterized in that, The display panel further includes a second organic encapsulation layer located on the same side of the light-emitting structure layer as the first organic encapsulation layer, and a first inorganic encapsulation layer located on the side of the organic encapsulation layer closer to the substrate, wherein the second organic encapsulation layer is in contact with the first inorganic encapsulation layer.

16. The display panel according to claim 12, characterized in that, The first organic encapsulation layer has a recessed portion, the orthographic projection of the recessed portion on the substrate does not overlap with the orthographic projection of the first protrusion on the substrate, and a first light blocking layer is further provided on the side of the first organic encapsulation layer away from the substrate, at least a portion of the first light blocking layer being located within the recessed portion.

17. The display panel according to claim 16, characterized in that, The display panel further includes a first inorganic encapsulation layer located on the side of the organic encapsulation layer near the substrate, and the first light blocking layer is in contact with the first inorganic encapsulation layer.

18. The display panel according to claim 11, characterized in that, The organic encapsulation layer includes a first organic encapsulation layer located on the side of the light-emitting structure layer away from the substrate. The first organic encapsulation layer has a plurality of spaced third openings, and the orthographic projection of each of the third openings on the substrate covers the orthographic projection of one of the color conversion parts on the substrate. Along the direction from the substrate to the light-emitting structure layer, the cross-section of the third opening is trapezoidal, and each of the reflective elements is disposed on the sidewall of the corresponding third opening.

19. The display panel according to claim 18, characterized in that, The orthographic projection of the third opening on the substrate covers the orthographic projection of its corresponding light-emitting unit on the substrate, the enclosed area of ​​the orthographic projection of the reflective element on the substrate covers the orthographic projection of its corresponding light-emitting unit on the substrate, and the orthographic projection of the reflective element on the substrate is annular.

20. The display panel according to claim 18, characterized in that, The display panel further includes a second organic encapsulation layer located on the side of the first organic encapsulation layer away from the substrate. The side of the organic encapsulation layer away from the substrate is also provided with a first light blocking layer. The surface of the first light blocking layer near the substrate is in contact with the first organic encapsulation layer or the second organic encapsulation layer.

21. The display panel according to any one of claims 1 to 20, characterized in that, The reflective element is made of metal.

22. The display panel according to any one of claims 1 to 20, characterized in that, The reflective element has a reflective surface close to the side of the corresponding light-emitting unit, and the angle between the reflective surface and the light-emitting surface of the corresponding light-emitting unit is less than 90°.

23. The display panel according to any one of claims 1 to 20, characterized in that, The reflective element has a reflective surface close to the side of the corresponding light-emitting unit, and the angle between the reflective surface and the light-emitting surface of the corresponding light-emitting unit is greater than or equal to 45°.

24. The display panel according to any one of claims 1 to 20, characterized in that, At least one of the color conversion units includes quantum dots and a scatterer.

25. A display device, characterized in that, Includes the display panel as described in any one of claims 1 to 24.

Images