Display panel and display device

Abstract

A display panel is provided. The display panel includes: a plurality of light emitting elements; a first encapsulation layer on the plurality of light emitting elements; a color conversion layer located on a side of the first encapsulation layer away from the plurality of light emitting elements and including a plurality of color conversion blocks; the color film is located on the side, away from the first packaging layer, of the color conversion layer; the second packaging layer is located on the side, away from the color conversion layer, of the color film. The second encapsulation layer at least comprises an organic encapsulation sub-layer.

Description

Technical Field

[0001] The present invention relates to display technology, and in particular to a display panel and a display device. Background Art

[0002] Quantum dot materials have excellent optical and electrical properties, including narrow emission peaks (full width at half maximum is about 30 nm), tunable spectra (ranging from visible light to infrared light), high photochemical stability, and low turn-on voltage. The wavelength of the light emitted from the quantum dot materials is tunable at least in part based on the particle size of the quantum dots. Due to these excellent properties, quantum dots have become the focus of research and development in the field of display technology. Summary of the Invention

[0003] In one aspect, the present disclosure provides a display panel, including: a plurality of light-emitting elements; a first encapsulation layer located on the plurality of light-emitting elements; a color conversion layer located on a side of the first encapsulation layer away from the plurality of light-emitting elements and including a plurality of color conversion blocks; a color filter located on a side of the color conversion layer away from the first encapsulation layer; and a second encapsulation layer located on a side of the color filter away from the color conversion layer; wherein the second encapsulation layer includes at least an organic encapsulation sub-layer.

[0004] Optionally, the display panel further includes: a first cover layer located on a side of the color conversion layer away from the first encapsulation layer and on a side of the color filter away from the second encapsulation layer; and a second cover layer located on a side of the first encapsulation layer away from the plurality of light-emitting elements and on a side of the color conversion layer away from the first cover layer; wherein the color filter is in direct contact with the first cover layer.

[0005] Optionally, the color filter includes a first color filter layer of a first color; a second color filter layer of a second color located on the first color filter layer of the first color; and a third color filter layer of a third color located on a side of the second color filter layer of the second color away from the first color filter layer of the first color; wherein the first color, the second color, and the third color are three different colors selected from green, red, and blue.

[0006] Optionally, the display panel further includes: a dam layer; and a plurality of first openings and a plurality of second openings extending through the dam layer; wherein the plurality of first openings and the plurality of second openings are located in a display area of the display panel; the plurality of first openings are configured to accommodate the plurality of color conversion blocks; and the plurality of color conversion blocks are not present in the plurality of second openings.

[0007] Optionally, a part of the color filter is at least partially in the corresponding second openings of the plurality of second openings.

[0008] Optionally, in a part of the light-blocking region including the respective second opening among the plurality of second openings, the display panel includes a stacked structure including at least two of the following: a part of a first color filter layer of a first color; a part of a second color filter layer of a second color, which is located on the part of the first color filter layer of the first color; or a part of a third color filter layer of a third color, which is located on a side of the part of the second color filter layer of the second color away from the part of the first color filter layer of the first color.

[0009] Optionally, the respective second opening is configured to accommodate a part of a first color filter layer of a first color.

[0010] Optionally, along a plane intersecting two adjacent color filter blocks and perpendicular to the surface of the first encapsulation layer: a part of the first color filter layer of the first color in a part of the light-transmitting region including one of the plurality of first openings has a first thickness; a part of the first color filter layer of the first color in a part of the light-blocking region including one of the plurality of second openings has a second thickness; the dam layer has a third thickness; the second thickness is greater than the first thickness; and a difference between the second thickness and the first thickness is substantially the same as the third thickness.

[0011] Optionally, the respective second opening is configured to accommodate a part of a first color filter layer of a first color and a part of a second color filter layer of a second color.

[0012] Optionally, along a plane intersecting two adjacent color filter blocks and perpendicular to the surface of the first encapsulation layer: a part of the first color filter layer of the first color in a part of the light-transmitting region including one of the plurality of first openings has a first thickness; a part of the first color filter layer of the first color in a part of the light-blocking region including one of the plurality of second openings has a second thickness; a part of the second color filter layer of the second color in a part of the light-transmitting region including one of the plurality of first openings has a fourth thickness; a part of the second color filter layer of the second color in a part of the light-blocking region including one of the plurality of second openings has a fifth thickness; the dam layer has a third thickness; the second thickness is greater than the first thickness; the fifth thickness is greater than the fourth thickness; a difference between the second thickness and the first thickness is substantially the same as the third thickness; and a difference between the fifth thickness and the fourth thickness is substantially the same as the third thickness.

[0013] Optionally, the display panel further includes a first cover layer, which is located on a side of the color conversion layer away from the first encapsulation layer and on a side of the color filter away from the second encapsulation layer; wherein, a portion of the first color filter layer within the corresponding second opening is in direct contact with a portion of the first cover layer within the corresponding second opening.

[0014] Optionally, the display panel further includes a first cover layer, which is located on a side of the color conversion layer away from the first encapsulation layer and on a side of the color filter away from the second encapsulation layer; wherein, a portion of the first color filter layer within the corresponding second opening is in direct contact with a portion of the first cover layer within the corresponding second opening; and a portion of the second color filter layer within the corresponding second opening is in direct contact with a portion of the first cover layer within the corresponding second opening.

[0015] Optionally, the corresponding second opening is configured to accommodate a portion of the first color filter layer of a first color, a portion of the second color filter layer of a second color, and a portion of the third color filter of a third color.

[0016] Optionally, the display panel further includes a black matrix; wherein, the corresponding second opening is configured to accommodate a portion of the black matrix.

[0017] Optionally, the display panel further includes a dam layer; and a groove that at least partially extends into the dam layer; wherein, the groove is located in a non-display area of the display panel; and the groove substantially surrounds a display area of the display panel.

[0018] Optionally, a portion of the second encapsulation layer is at least partially within the groove.

[0019] Optionally, the display panel further includes a plurality of third openings that at least partially extend into the dam layer; wherein, the plurality of third openings are located in the non-display area; a combination of the plurality of third openings substantially surrounds the display area; and the groove substantially surrounds the combination of the plurality of third openings.

[0020] Optionally, a portion of the second encapsulation layer is at least partially within a corresponding third opening of the plurality of third openings.

[0021] Optionally, the display panel includes quantum dot materials that are at least partially within a corresponding third opening of the plurality of third openings.

[0022] Optionally, the display panel includes quantum dot materials at least partially within third openings on a first side or a second side of the display region among the plurality of third openings; wherein there are no quantum dot materials within third openings on a third side or a fourth side of the display region among the plurality of third openings; the first side is opposite to the second side; and the third side is opposite to the fourth side.

[0023] Optionally, the display panel further includes a first cover layer, which is located on a side of the color conversion layer away from the first encapsulation layer and on a side of the color filter away from the second encapsulation layer; wherein the quantum dot materials are at least partially within the grooves; a part of the second encapsulation layer is at least partially within the grooves; and the quantum dot materials are at least partially within corresponding third openings among the plurality of third openings; wherein a surface of the quantum dot materials within the corresponding third openings that is in direct contact with the first cover layer has a first height relative to a surface of the first substrate; a surface of the quantum dot materials within the grooves that is in direct contact with the part of the second encapsulation layer within the grooves has a second height relative to the surface of the first substrate; and the first height is greater than the second height.

[0024] In another aspect, the present disclosure provides a display device, including a display panel as described herein or manufactured by the method described herein, and one or more integrated circuits connected to the display panel. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] According to various disclosed embodiments, the following drawings are merely examples for illustrative purposes and are not intended to limit the scope of the present invention.

[0026] Figure 1 A schematic diagram showing the structure of a display panel according to some embodiments of the present disclosure.

[0027] Figure 2 is a cross-sectional view along Figure 1 line A-A' in

[0028] Figure 3 is a plan view of a display panel according to some embodiments of the present disclosure.

[0029] Figure 4 is a cross-sectional view of a display panel according to some embodiments of the present disclosure.

[0030] Figure 5 is a cross-sectional view of a display panel according to some embodiments of the present disclosure.

[0031] Figure 6A A schematic diagram showing the structure of a light-emitting element according to some embodiments of the present disclosure.

[0032] Figure 6B is a schematic diagram showing the structure of a light-emitting element in some embodiments according to the present disclosure.

[0033] Figure 6C is a schematic diagram showing the structure of a light-emitting element in some embodiments according to the present disclosure.

[0034] Figure 7A is a schematic diagram showing the structure of a first color conversion block in some embodiments according to the present disclosure.

[0035] Figure 7B is a schematic diagram showing the structure of a second color conversion block in some embodiments according to the present disclosure.

[0036] Figure 7C is a schematic diagram showing the structure of a light-transmitting block in some embodiments according to the present disclosure.

[0037] Figure 8 is a schematic diagram showing the structure of a display panel in some embodiments according to the present disclosure.

[0038] Figure 9 is along Figure 8 a cross-sectional view taken along line C-C' in

[0039] Figure 10 is a plan view of a display panel in some embodiments according to the present disclosure.

[0040] Figure 11 is a cross-sectional view of a display panel in some embodiments according to the present disclosure.

[0041] Figure 12 is a cross-sectional view of a display panel in some embodiments according to the present disclosure.

[0042] Figure 13 shows a plurality of first openings and a plurality of second openings in a color conversion substrate in some embodiments according to the present disclosure.

[0043] Figure 14 shows a color filter film in a color conversion substrate in some embodiments according to the present disclosure.

[0044] Figures 15A to 15E shows a process of manufacturing a color conversion substrate in some embodiments according to the present disclosure.

[0045] Figure 16 is a cross-sectional view of a display panel in some embodiments according to the present disclosure.

[0046] Figure 17 shows a plurality of first openings and a plurality of second openings in a color conversion substrate in some embodiments according to the present disclosure.

[0047] Figure 18 Shows a color filter film in a color conversion substrate according to some embodiments of the present disclosure.

[0048] Figure 19 Is a cross-sectional view of a display panel according to some embodiments of the present disclosure.

[0049] Figure 20 Shows a plurality of first openings and a plurality of second openings in a color conversion substrate according to some embodiments of the present disclosure.

[0050] Figure 21 Shows a color filter film in a color conversion substrate according to some embodiments of the present disclosure.

[0051] Figure 22 Is a cross-sectional view of a display panel according to some embodiments of the present disclosure.

[0052] Figure 23 Shows a plurality of first openings and a plurality of second openings in a color conversion substrate according to some embodiments of the present disclosure.

[0053] Figure 24 Shows a color filter film in a color conversion substrate according to some embodiments of the present disclosure.

[0054] Figure 25 Is a cross-sectional view of a display panel according to some embodiments of the present disclosure.

[0055] Figure 26 Shows a plurality of first openings and a plurality of second openings in a color conversion substrate according to some embodiments of the present disclosure.

[0056] Figure 27 Shows a color filter film in a color conversion substrate according to some embodiments of the present disclosure.

[0057] Figure 28 Shows a sub-pixel arrangement in a display panel according to some embodiments of the present disclosure.

[0058] Figure 29 Shows a sub-pixel arrangement in a display panel according to some embodiments of the present disclosure.

[0059] Figure 30 Shows a sub-pixel arrangement in a display panel according to some embodiments of the present disclosure.

[0060] Figure 31 Shows a sub-pixel arrangement in a display panel according to some embodiments of the present disclosure.

[0061] Figure 32 Is a plan view of a display panel according to some embodiments of the present disclosure.

[0062] Figure 33 is a cross-sectional view along the E-E' line in Figure 32 .

[0063] Figure 34 is a plan view of a display panel according to some embodiments of the present disclosure.

[0064] Figure 35 is a cross-sectional view along the F-F' line in Figure 34 .

[0065] Figure 36 is a plan view of a display panel according to some embodiments of the present disclosure.

[0066] Figure 37 is a cross-sectional view along the G-G' line in Figure 36 .

[0067] Figure 38 is a plan view of a display panel according to some embodiments of the present disclosure.

[0068] Figure 39 is a cross-sectional view along the H-H' line in Figure 36 . Detailed Embodiments

[0069] The present disclosure will now be described more specifically with reference to the following embodiments. It should be noted that the following description of some embodiments presented herein is for illustrative and descriptive purposes only. It is not exhaustive or limited to the exact forms disclosed.

[0070] Figure 1 is a schematic diagram showing the structure of a display panel according to some embodiments of the present disclosure. Figure 2 is a cross-sectional view along the A-A' line in Figure 1 . Referring to Figure 1 and Figure 2, in some embodiments, the display panel DP includes a light-emitting substrate LS, a color conversion substrate CS, and a spacer layer SL that spaces apart the light-emitting substrate LS and the color conversion substrate CS. The display panel DP includes a display area DA and a non-display area NDA. As used herein, the term "display area" refers to the area of the display substrate (e.g., the color conversion substrate or the light-emitting substrate) in the display panel where the actual display image is formed. Optionally, the display area may include a sub-pixel area and an inter-sub-pixel area. The sub-pixel area refers to the light-emitting area of the sub-pixel, for example, the area corresponding to the pixel electrode in a liquid crystal display or the area corresponding to the light-emitting layer in an organic light-emitting diode display panel. The inter-sub-pixel area is the area between adjacent sub-pixel areas, for example, the area corresponding to the black matrix in a liquid crystal display or the area corresponding to the pixel definition layer in an organic light-emitting diode display panel. Optionally, the inter-sub-pixel area is the area between adjacent sub-pixel areas within the same pixel. Optionally, the inter-sub-pixel area is the area between adjacent sub-pixel areas in two adjacent pixels. As used herein, the term "non-display area" refers to the area of the display substrate (e.g., the color conversion substrate or the light-emitting substrate) in the display panel where various circuits and wires are provided to transmit signals to the display substrate. To increase the transparency of the display device, opaque or non-transparent components of the display device (e.g., a battery, a printed circuit board, a metal frame) may be disposed in the non-display area rather than the display area.

[0071] Figure 3 is a plan view of a display panel according to some embodiments of the present disclosure. Referring to Figure 3, in some embodiments, the display panel includes a plurality of sub-pixel regions SR and inter-sub-pixel regions ISR. As used herein, a sub-pixel region refers to the light-emitting region of a sub-pixel. For example, it is the region corresponding to a pixel electrode in a liquid crystal display, or the region corresponding to a light-emitting layer in a light-emitting diode display panel, or the region corresponding to a color conversion block in a display panel according to the present disclosure. Optionally, a pixel may include a plurality of individual light-emitting regions corresponding to a plurality of sub-pixels in the pixel. Optionally, the sub-pixel region is the light-emitting region of a red sub-pixel. Optionally, the sub-pixel region is the light-emitting region of a green sub-pixel. Optionally, the sub-pixel region is the light-emitting region of a blue sub-pixel. Optionally, the sub-pixel region is the light-emitting region of a white sub-pixel. As used herein, an inter-sub-pixel region refers to the region between adjacent sub-pixel regions. For example, it is the region corresponding to a black matrix in a liquid crystal display, or the region corresponding to a pixel definition layer in a light-emitting diode display panel, or the region corresponding to a dam layer in a display panel according to the present disclosure. Optionally, the inter-sub-pixel region is the region between adjacent sub-pixel regions within the same pixel. Optionally, the inter-sub-pixel region is the region between adjacent sub-pixel regions in two adjacent pixels. Optionally, the inter-sub-pixel region is the region between the sub-pixel region of a red sub-pixel and the sub-pixel region of an adjacent green sub-pixel. Optionally, the inter-sub-pixel region is the region between the sub-pixel region of a red sub-pixel and the sub-pixel region of an adjacent blue sub-pixel. Optionally, the inter-sub-pixel region is the region between the sub-pixel region of a green sub-pixel and the sub-pixel region of an adjacent blue sub-pixel.

[0072] Various suitable embodiments can be practiced to fabricate the display panel of the present disclosure. In one example, a light-emitting substrate and a color conversion substrate are fabricated separately and then assembled together using a filling layer to form the display panel. In another example, the color conversion substrate is fabricated directly on the light-emitting substrate.

[0073] Figure 4 is a cross-sectional view of a display panel according to some embodiments of the present disclosure. For example, Figure 4 may be a cross-sectional view along the Figure 3 B-B' line in the display panel shown. Referring to Figure 4 , in some embodiments, the display panel includes a light-emitting substrate LS and a color conversion substrate CS. The light-emitting substrate LS and the color conversion substrate CS are assembled together. In some embodiments, the display panel further includes a filling layer FL, which is located between the light-emitting substrate LS and the color conversion substrate CS and assembles the light-emitting substrate LS and the color conversion substrate CS into the display panel.

[0074] Reference Figure 4, in some embodiments, the light-emitting substrate LS includes a first substrate BS1; a plurality of thin-film transistors TFT (e.g., transistors in a pixel driving circuit) located on the first substrate BS1; an insulating layer IN located on a side of the plurality of transistors TFT away from the first substrate BS1; a pixel defining layer PDL and a plurality of light-emitting elements LE located on a side of the insulating layer IN away from the first substrate BS1; and a first encapsulation layer EN1 located on a side of the plurality of light-emitting elements LE and the pixel defining layer PDL away from the first substrate BS1. Each of the plurality of light-emitting elements LE includes an anode AD, a light-emitting layer EL located on a side of the anode AD away from the first substrate BS1, and a cathode CD located on a side of the light-emitting layer EL away from the first substrate BS1. In one example, the first encapsulation layer EN1 includes a first inorganic encapsulation sub-layer ENL1, an organic encapsulation sub-layer ENL2 located on a side of the first inorganic encapsulation sub-layer ENL1 away from the first substrate BS1, and a second inorganic encapsulation sub-layer ENL3 located on a side of the organic encapsulation sub-layer ENL2 away from the first substrate BS1.

[0075] Referring to Figure 4 , in some embodiments, the color conversion substrate CS includes a dam layer BL defining a plurality of openings, a color conversion layer CCL at least partially in the plurality of openings defined by the dam layer BL, and a light-transmissive layer LTL. The color conversion layer CCL includes a plurality of color conversion blocks CCB. The light-transmissive layer LTL includes a plurality of light-transmissive blocks LTB.

[0076] In some embodiments, the color conversion substrate CS further includes a color filter CF located on the color conversion layer CCL and the light-transmissive layer LTL. The color filter CF includes a plurality of color filter blocks CFB. The orthographic projection of each of the plurality of color filter blocks CFB on the substrate at least partially overlaps with the orthographic projection of the corresponding color conversion block or the corresponding light-transmissive block on the substrate. The orthographic projections of adjacent color filter blocks may partially overlap with each other along the edges, for example.

[0077] In some embodiments, the color conversion substrate CS further includes a black matrix BM located on a side of the color filter CF away from the color conversion layer CCL and the light-transmissive layer LTL. The black matrix BM is located in the inter-subpixel region ISR. Each color filter block, each color conversion block, or each light-transmissive block is at least partially located in a separate subpixel region. Optionally, the color conversion substrate CS includes a first cover layer CAP1 located on a side of the dam layer BL, the color conversion layer CCL, and the light-transmissive layer LTL close to the second substrate BS2. Optionally, the color conversion substrate CS includes a second cover layer CAP2 located on a side of the dam layer BL, the color conversion layer CCL, and the light-transmissive layer LTL away from the color filter CF.

[0078] In some embodiments, the light-transmissive layer LTL is a light-scattering layer, and the plurality of light-transmissive blocks LTB are a plurality of light-scattering blocks.

[0079] In some embodiments, the display panel is a quantum dot display panel. In the quantum dot display panel, a light source (e.g., a blue light source) is used to excite quantum dots to emit light based on the principle of photoluminescence excitation. In some embodiments, the plurality of color conversion blocks CCB include a first color conversion block and a second color conversion block. In one example, the first color conversion block is configured to convert light of a third color (e.g., blue light) into light of a first color (e.g., red light). In another example, the second color conversion block is configured to convert light of a third color (e.g., blue light) into light of a second color (e.g., green light). The plurality of light transmissive blocks LTB do not convert the color of the incident light. Optionally, the plurality of light transmissive blocks LTB are configured to scatter the incident light (e.g., blue light), which is emitted through the color filter block for image display. The plurality of color filter blocks CFB include a color filter block of a first color (e.g., a red color filter block) corresponding to the first color conversion block, a color filter block of a second color (e.g., a green color filter block) corresponding to the second color conversion block, and a color filter block of a third color (e.g., a blue color filter block) corresponding to the light transmissive block.

[0080] Figure 5 is a cross-sectional view of a display panel according to some embodiments of the present disclosure. Referring to Figure 5 , in some embodiments, the display panel includes a first substrate BS1; a driving control layer DCL located on the first substrate BS1, which includes a plurality of transistors configured to control the light emission of the display panel; a light emitting element layer LDL, which includes a plurality of light emitting elements and is located on a side of the driving control layer DCL away from the first substrate BS1; a first encapsulation layer EN1, which is located on a side of the light emitting element layer LDL away from the first substrate BS1; a filling layer FL, which is located on a side of the first encapsulation layer EN1 away from the first substrate BS1; a color conversion layer CCL, which is located on a side of the filling layer FL away from the first substrate BS1; a color filter CF, which is located on a side of the color conversion layer CCL away from the first substrate BS1; and a second substrate BS2, which is located on a side of the color filter CF away from the first substrate BS1.

[0081] Various suitable light emitting elements can be implemented in the display panel according to the present disclosure. Figure 6A is a schematic diagram showing the structure of a light emitting element according to some embodiments of the present disclosure. Referring to Figure 6A , in some embodiments, the light emitting element includes an anode AD, a hole transport layer HTL located on the anode AD, a first light emitting layer EML1 located on a side of the hole transport layer HTL away from the anode AD, an electron transport layer ETL located on a side of the first light emitting layer EML1 away from the hole transport layer HTL, and a cathode CD located on a side of the electron transport layer ETL away from the first light emitting layer EML1.

[0082] In some embodiments, the light-emitting element may have a stacked structure. Figure 6B is a schematic diagram showing the structure of a light-emitting element in some embodiments according to the present disclosure. Refer to Figure 6B , in some embodiments, the light-emitting element includes an anode AD, a hole transport layer HTL located on the anode AD, a first light-emitting layer EML1 located on a side of the hole transport layer HTL away from the anode AD, a first charge generation layer CGL1 located on a side of the first light-emitting layer EML1 away from the hole transport layer HTL, a second light-emitting layer EML2 located on a side of the first charge generation layer CGL1 away from the first light-emitting layer EML1, an electron transport layer ETL located on a side of the second light-emitting layer EML2 away from the first charge generation layer CGL1, and a cathode CD located on a side of the electron transport layer ETL away from the second light-emitting layer EML2.

[0083] Figure 6C is a schematic diagram showing the structure of a light-emitting element in some embodiments according to the present disclosure. Refer to Figure 6C , in some embodiments, the light-emitting element includes an anode AD, a hole transport layer HTL located on the anode AD, a first light-emitting layer EML1 located on a side of the hole transport layer HTL away from the anode AD, a first charge generation layer CGL1 located on a side of the first light-emitting layer EML1 away from the hole transport layer HTL, a second light-emitting layer EML2 located on a side of the first charge generation layer CGL1 away from the first light-emitting layer EML1, a second charge generation layer CGL2 located on a side of the second light-emitting layer EML2 away from the first charge generation layer CGL1, a third light-emitting layer EML3 located on a side of the second charge generation layer CGL2 away from the second light-emitting layer EML2, an electron transport layer ETL located on a side of the third light-emitting layer EML3 away from the second charge generation layer CGL2, and a cathode CD located on a side of the electron transport layer ETL away from the third light-emitting layer EML3.

[0084] Figure 7A is a schematic diagram showing the structure of a first color conversion block in some embodiments according to the present disclosure. Refer to Figure 7A, the first color conversion block CCB1 is a color conversion block configured to convert light of a third color (e.g., blue light) into light of a first color (e.g., red light). In some embodiments, the first color conversion block CCB1 includes a first matrix MS1, a plurality of first scattering particles SCP1 dispersed in the first matrix MS1, and a plurality of first quantum dots QD1. The first matrix MS1 may include a polymer material, such as an organic polymer material. Examples of suitable polymer materials for preparing the first matrix MS1 include epoxy resin, acrylic resin, polyurethane resin, silicone resin, and silane resin. Examples of suitable materials for preparing the plurality of first scattering particles SCP1 include TiO2, ZnO, ZrO2, Al2O3, SiO2. Examples of suitable quantum dot materials for manufacturing the plurality of first quantum dots QD1 include quantum dot materials of the first color (e.g., red). The quantum dot materials may include materials selected from the group consisting of CdS, CdSe, ZnSe, InP, PbS, CsPbCl3, CsPbBr3, CsPhI3, CdS / ZnS, CdSe / ZnS, InP / ZnS, PbS / ZnS, CsPbCl3 / ZnS, CsPbBr3 / ZnS, and CsPhI3 / ZnS.

[0085] Figure 7B is a schematic diagram showing the structure of the second color conversion block in some embodiments according to the present disclosure. Referring to Figure 7B , the second color conversion block CCB2 is a color conversion block configured to convert light of a third color (e.g., blue light) into light of a second color (e.g., green light). In some embodiments, the second color conversion block CCB2 includes a second matrix MS2, a plurality of second scattering particles SCP2 dispersed in the second matrix MS2, and a plurality of second quantum dots QD2. The second matrix MS2 may include a polymer material, such as an organic polymer material. Examples of suitable polymer materials for preparing the second matrix MS2 include epoxy resin, acrylic resin, polyurethane resin, silicone resin, and silane resin. Examples of suitable materials for preparing the plurality of second scattering particles SCP2 include TiO2, ZnO, ZrO2, Al2O3, SiO2. Examples of suitable quantum dot materials for manufacturing the plurality of second quantum dots QD2 include quantum dot materials of the second color (e.g., green). The quantum dot materials may include materials selected from the group consisting of CdS, CdSe, ZnSe, InP, PbS, CsPbCl3, CsPbBr3, CsPhI3, CdS / ZnS, CdSe / ZnS, InP / ZnS, PbS / ZnS, CsPbCl3 / ZnS, CsPbBr3 / ZnS, and CsPhI3 / ZnS.

[0086] Figure 7CThis is a schematic diagram showing the structure of a light-transmitting block according to some embodiments of the present disclosure. Referring to Figure 7C , in some embodiments, the light-transmitting block LTB includes a third matrix MS3 and a plurality of third scattering particles SCP3 dispersed in the third matrix MS3. The third matrix MS3 may include a polymer material, such as an organic polymer material. Examples of suitable polymer materials for preparing the third matrix MS3 include epoxy resin, acrylic resin, polyurethane resin, silicone resin, and silane resin. Examples of suitable materials for preparing the plurality of third scattering particles SCP3 include TiO2, ZnO, ZrO2, Al2O3, and SiO2.

[0087] In one example, the first matrix MS1, the second matrix MS2, and the third matrix MS3 include the same polymer material. In another example, at least two of the first matrix MS1, the second matrix MS2, and the third matrix MS3 include different polymer materials.

[0088] In one example, the first scattering particle SCP1, the second scattering particle SCP2, and the third scattering particle SCP3 include the same scattering material. In another example, at least two of the first scattering particle SCP1, the second scattering particle SCP2, and the third scattering particle SCP3 include different scattering materials.

[0089] The inventors of the present disclosure found that in Figure 4 and Figure 5 In the display panel shown, the light emitted from the light-emitting element layer LDL must pass through the first encapsulation layer EN1 and the filling layer FL before reaching the quantum dot material in the color conversion layer CCL. Figure 4 and Figure 5 The display panels shown in are prone to light leakage between adjacent sub-pixels, resulting in color shift problems and reduced color purity of the display.

[0090] Therefore, the present disclosure particularly provides a display panel and a display device that substantially eliminate one or more problems caused by the limitations and disadvantages of the prior art. In one aspect, the present disclosure provides a display panel. In some embodiments, the display panel includes a plurality of light-emitting elements; a first encapsulation layer located on the plurality of light-emitting elements; a color conversion layer located on a side of the first encapsulation layer away from the plurality of light-emitting elements and including a plurality of color conversion blocks; a color filter located on a side of the color conversion layer away from the first encapsulation layer; and a second encapsulation layer located on a side of the color filter away from the color conversion layer. Optionally, the second encapsulation layer at least includes an organic encapsulation sub-layer.

[0091] Figure 8 This is a schematic diagram showing the structure of a display panel according to some embodiments of the present disclosure. Figure 9 is along Figure 8Cross-sectional view of the C-C' line in Figure 8 and Figure 9 , in some embodiments, the display panel DP includes a light-emitting substrate LS and a color conversion substrate CS. The display panel DP includes a display area DA and a non-display area NDA.

[0092] Figure 10 is a plan view of a display panel according to some embodiments of the present disclosure. Refer to Figure 10 , in some embodiments, the display panel includes a plurality of sub-pixel regions SR and an inter-sub-pixel region ISR.

[0093] Various suitable implementation manners can be practiced to fabricate the display panel of the present disclosure. In one example, the light-emitting substrate and the color conversion substrate are fabricated separately and then assembled together using a filling layer to form the display panel. In another example, the color conversion substrate is fabricated directly on the light-emitting substrate.

[0094] Figure 11 is a cross-sectional view of a display panel according to some embodiments of the present disclosure. Refer to Figure 11 , in some embodiments, the display panel includes a first substrate BS1; a drive control layer DCL located on the first substrate BS1, which includes a plurality of transistors configured to control the light emission of the display panel; a light-emitting element layer LDL, which includes a plurality of light-emitting elements and is located on the side of the drive control layer DCL away from the first substrate BS1; a first encapsulation layer EN1, which is located on the side of the light-emitting element layer LDL away from the first substrate BS1; a color conversion layer CCL, which is located on the side of the first encapsulation layer EN1 away from the first substrate BS1; a color filter CF, which is located on the side of the color conversion layer CCL away from the first substrate BS1; and a second encapsulation layer EN2, which is located on the side of the color filter CF away from the first substrate BS1.

[0095] Figure 12 is a cross-sectional view of a display panel according to some embodiments of the present disclosure. For example, Figure 12 may be a cross-sectional view of the display panel along the D-D' line shown in Figure 10 . Refer to Figure 12 , in some embodiments, the display panel includes a light-emitting substrate LS and a color conversion substrate CS. The light-emitting substrate LS and the color conversion substrate CS are assembled together.

[0096] Refer to Figure 12, in some embodiments, the light-emitting substrate LS includes a first substrate BS1; a plurality of thin-film transistors TFT (e.g., transistors in a pixel driving circuit) located on the first substrate BS1; an insulating layer IN located on a side of the plurality of transistors TFT away from the first substrate BS1; a pixel defining layer PDL and a plurality of light-emitting elements LE located on a side of the insulating layer IN away from the first substrate BS1; and a first encapsulation layer EN1 located on a side of the plurality of light-emitting elements LE and the pixel defining layer PDL away from the first substrate BS1. Each of the plurality of light-emitting elements LE includes an anode AD, a light-emitting layer EL located on a side of the anode AD away from the first substrate BS1, and a cathode CD located on a side of the light-emitting layer EL away from the first substrate BS1. In one example, the first encapsulation layer EN1 includes a first inorganic encapsulation sub-layer ENL1, a first organic encapsulation sub-layer ENL2 located on a side of the first inorganic encapsulation sub-layer ENL1 away from the first substrate BS1, and a second inorganic encapsulation sub-layer ENL3 located on a side of the first organic encapsulation sub-layer ENL2 away from the first substrate BS1.

[0097] In some embodiments, the color conversion substrate CS includes a second cover layer CAP2 located on the first encapsulation layer EN1, a dam layer BL defining a plurality of first openings, a color conversion layer CCL and a light scattering layer LSL at least partially located in the plurality of first openings defined by the dam layer BL. The color conversion layer CCL includes a plurality of color conversion blocks CCB, and the plurality of color conversion blocks CCB include a first color conversion block CCB1 of a first color and a second color conversion block CCB2 of a second color. The light scattering layer LSL includes a plurality of light scattering blocks LSB.

[0098] In some embodiments, the color conversion substrate CS further includes a plurality of second openings extending through the dam layer BL. Figure 13 Shows a plurality of first openings and a plurality of second openings in a color conversion substrate according to some embodiments of the present disclosure. Refer to Figure 12 and Figure 13 , the plurality of first openings AP1 and the plurality of second openings AP2 are located in the display area DA of the color conversion substrate CS. In some embodiments, the plurality of first openings AP1 are configured to accommodate the plurality of color conversion blocks CCB and the plurality of light scattering blocks LSB. There are no plurality of color conversion blocks CCB and plurality of light scattering blocks LSB in the plurality of second openings AP2.

[0099] In some embodiments, the display panel includes a plurality of first sub-pixels sp1, a plurality of second sub-pixels sp2, a plurality of third sub-pixels sp3, and a plurality of dummy sub-pixels dsp. Each sub-pixel among the plurality of first sub-pixels sp1, the plurality of second sub-pixels sp2, or the plurality of third sub-pixels sp3 includes each light-emitting element among the plurality of light-emitting elements LE. The plurality of light-emitting elements LE are not present in the plurality of dummy sub-pixels dsp.

[0100] In some embodiments, the display panel includes a first light-transmitting region LTR1 located in the first sub-pixel sp1, a second light-transmitting region LTR2 located in the second sub-pixel sp2, a third light-transmitting region LTR3 located in the third sub-pixel sp3, and a non-light-transmitting region NTR. In some embodiments, the color conversion layer CCL includes a plurality of color conversion blocks CCB, which includes a first color conversion block CCB1 and a second color conversion block CCB2. The light-scattering layer includes a plurality of light-scattering blocks LSB. The first color conversion block CCB1 is at least partially located in the first light-transmitting region LTR1. The second color conversion block CCB2 is at least partially located in the second light-transmitting region LTR2. Each light-scattering block among the plurality of light-scattering blocks LSB is at least partially located in the third light-transmitting region LTR3.

[0101] In some embodiments, the display panel includes a dam layer BL located in the non-light-transmitting region NTR. In some embodiments, the plurality of dummy sub-pixels dsp are located in the non-light-transmitting region NTR.

[0102] In some embodiments, the color conversion substrate CS further includes a first cover layer CAP1 located on a side of the dam layer BL, the color conversion layer CCL, and the light-scattering layer LSL away from the second cover layer CAP2. In some embodiments, the first cover layer CAP1 includes an inorganic insulating material. In some embodiments, the second cover layer CAP2 includes an inorganic insulating material.

[0103] In some embodiments, the first cover layer CAP1 is in direct contact with the plurality of color conversion blocks CCB and is in direct contact with the plurality of light-scattering blocks LSB. In some embodiments, a part of the first cover layer CAP1 is located in a corresponding second opening among the plurality of second openings AP2. In some embodiments, the part of the first cover layer CAP1 in the corresponding second opening is in direct contact with the second cover layer CAP2. Optionally, the first cover layer CAP1 is in direct contact with the dam layer BL.

[0104] In some embodiments, the second cover layer CAP2 is in direct contact with the plurality of color conversion blocks CCB and is in direct contact with the plurality of light-scattering blocks LSB. Optionally, the second cover layer CAP2 is in direct contact with the dam layer BL.

[0105] In some embodiments, the color conversion substrate CS further includes a color filter CF on a side of the first cover layer CAP1 away from the dam layer BL, the color conversion layer CCL, and the light scattering layer LSL. The color filter CF includes a plurality of color filter blocks CFB. Orthographic projections of each of the plurality of color filter blocks CFB on the substrate substrate overlap at least partially with orthographic projections of corresponding color conversion blocks or corresponding light scattering blocks on the substrate substrate. Orthographic projections of adjacent color filter blocks may partially overlap with each other along the edges, for example.

[0106] In some embodiments, the first cover layer CAP1 is in direct contact with the color filter CF. The inventors of the present disclosure have found that by making the first cover layer CAP1 in direct contact with the color filter CF, in direct contact with a plurality of color conversion blocks CCB, and in direct contact with a plurality of light scattering blocks LSB, the optical distance between the color filter and the color conversion layer CCL can be reduced, the color shift problem can be prevented, and the display quality can be improved.

[0107] In some embodiments, the second cover layer CAP2 is in direct contact with the first encapsulation layer EN1.

[0108] In some embodiments, the plurality of color filter blocks CFB include a first color filter block CFB1, a second color filter block CFB2, and a third color filter block CFB3. The orthographic projection of the first color filter block CFB1 on the substrate substrate overlaps at least partially with the orthographic projection of the first color conversion block CCB1 on the substrate substrate. The orthographic projection of the second color filter block CFB2 on the substrate substrate overlaps at least partially with the orthographic projection of the second color conversion block CCB2 on the substrate substrate. The orthographic projection of the third color filter block CFB3 on the substrate substrate overlaps at least partially with the orthographic projection of the corresponding light scattering block among the plurality of light scattering blocks LSB on the substrate substrate.

[0109] Figure 14 Shows a color filter in a color conversion substrate according to some embodiments of the present disclosure. Refer to Figures 12 to 14 , in some embodiments, the color filter CF includes a first color filter layer CF1 of a first color; a second color filter layer CF2 of a second color, which is located on the first color filter layer CF1 of the first color; and a third color filter layer CF3 of a third color, which is located on a side of the second color filter layer CF2 of the second color away from the first color filter layer CF1 of the first color. In some embodiments, the first color, the second color, and the third color are three different colors selected from green, red, and blue. In one example, the first color is green, the second color is red, and the third color is blue.

[0110] In some embodiments, in at least a portion of the light-blocking region NTR between two adjacent light-transmitting regions (e.g., between the first light-transmitting region LTR1 and the second light-transmitting region LTR2, or between the second light-transmitting region LTR2 and the third light-transmitting region LTR3, or between the first light-transmitting region LTR1 and the third light-transmitting region LTR3), the color conversion substrate includes a stacked structure that includes at least two of the following: a portion of a first color filter layer CF1 of a first color; a portion of a second color filter layer CF2 of a second color, which is located on a portion of the first color filter layer CF1 of the first color; or a portion of a third color filter layer CF3 of a third color, which is located on a side of the portion of the second color filter layer CF2 of the second color away from the portion of the first color filter layer CF1 of the first color. Optionally, in at least a portion of the light-blocking region NTR between two adjacent light-transmitting regions, the color conversion substrate includes a stacked structure that includes: a portion of a first color filter layer CF1 of a first color; a portion of a second color filter layer CF2 of a second color, which is located on a portion of the first color filter layer CF1 of the first color; or a portion of a third color filter layer CF3 of a third color, which is located on a side of the portion of the second color filter layer CF2 of the second color away from the portion of the first color filter layer CF1 of the first color. The stacked structure in a portion of the light-blocking region NTR serves as a light-blocking black matrix.

[0111] In some embodiments, in at least a portion of the light-blocking region NTR that includes corresponding dummy sub-pixels among a plurality of dummy sub-pixels dsp, the color conversion substrate includes a stacked structure that includes at least two of the following: a portion of a first color filter layer CF1 of a first color; a portion of a second color filter layer CF2 of a second color, which is located on a portion of the first color filter layer CF1 of the first color; or a portion of a third color filter layer CF3 of a third color, which is located on a side of the portion of the second color filter layer CF2 of the second color away from the portion of the first color filter layer CF1 of the first color. Optionally, in at least a portion of the light-blocking region NTR that includes corresponding dummy sub-pixels among a plurality of dummy sub-pixels dsp, the color conversion substrate includes a stacked structure that includes: a portion of a first color filter layer CF1 of a first color; a portion of a second color filter layer CF2 of a second color, which is located on a portion of the first color filter layer CF1 of the first color; or a portion of a third color filter layer CF3 of a third color, which is located on a side of the portion of the second color filter layer CF2 of the second color away from the portion of the first color filter layer CF1 of the first color.

[0112] In some embodiments, each of the plurality of dummy sub-pixels dsp is located between two adjacent pixels. In one example, each of the two adjacent pixels includes a first sub-pixel among the plurality of first sub-pixels sp1, a second sub-pixel among the plurality of second sub-pixels sp2, and a third sub-pixel among the plurality of third sub-pixels sp3. Each of the dummy sub-pixels is configured to absorb light emitted from at least one of the two adjacent pixels. The inventors of the present disclosure have found that by providing the plurality of dummy sub-pixels dsp, light leakage between adjacent pixels can be effectively prevented, thereby improving the color characteristics of the color conversion substrate and the display panel.

[0113] In some embodiments, each of the plurality of second openings AP2 is configured to accommodate at least one of the following: a part of the first color filter layer CF1 of the first color; a part of the second color filter layer CF2 of the second color; or a part of the third color filter layer CF3 of the third color. In a specific example, each of the second openings is configured to accommodate a part of the first color filter layer CF1 of the first color; the following parts are located outside the corresponding second openings: a part of the second color filter layer CF2 of the second color, which is located on the part of the first color filter layer CF1 of the first color; and a part of the third color filter layer CF3 of the third color, which is located on the side of the part of the second color filter layer CF2 of the second color away from the part of the first color filter layer CF1 of the first color. The part of the first color filter layer CF1 of the first color within the corresponding second opening is in direct contact with the part of the first cover layer CAP1 within the corresponding second opening.

[0114] In some embodiments, the first color is green, the second color is red, and the third color is blue.

[0115] In an alternative embodiment, the first color is red, the second color is green, and the third color is blue.

[0116] In some embodiments, along a plane that intersects two adjacent color film blocks and is perpendicular to the surface of the first encapsulation layer EN1, a part of the first color film layer CF1 (e.g., the first color film block CFB1) has a first thickness t1, and this part is located in a part of the light-transmitting region including one of the plurality of first openings; a part of the first color film layer CF1 of the first color has a second thickness t2, and this part is located in a part of the non-light-transmitting region including one of the plurality of second openings. Optionally, the second thickness t2 is greater than the first thickness t1. In some embodiments, along a plane that intersects two adjacent color film blocks and is perpendicular to the surface of the first encapsulation layer EN1, the dam layer BL has a third thickness t3. Optionally, the difference between the second thickness t2 and the first thickness t1 is substantially the same as the third thickness t3. As used herein, the term "substantially the same" means that the difference between two values does not exceed 10% of the base value (e.g., one of the two values), such as not exceeding 8% of the base value, not exceeding 6%, not exceeding 4%, not exceeding 2%, not exceeding 1%, not exceeding 0.5%, not exceeding 0.1%, not exceeding 0.05%, and not exceeding 0.01%.

[0117] In some embodiments, for a part of the first color film layer CF1 of the first color in a part of the light-transmitting region including one of the plurality of first openings (e.g., the first color film block CFB1), the surface of this part on the side away from the surface of the first encapsulation layer EN1 has a first relative height rh1 with respect to the surface of the first encapsulation layer EN1, and for a part of the first color film layer CF1 of the first color in a part of the non-light-transmitting region including one of the plurality of second openings, the surface of this part on the side away from the surface of the first encapsulation layer EN1 has a second relative height rh2 with respect to the surface of the first encapsulation layer EN1. Optionally, the first relative height rh1 and the second relative height rh2 are substantially the same.

[0118] In some embodiments, the color conversion substrate further includes a second encapsulation layer EN2, which is located on the side of the color film CF away from the first cover layer CAP1. The second encapsulation layer EN2 includes at least one inorganic encapsulation sub-layer and / or at least one organic encapsulation sub-layer.

[0119] In some embodiments, referring to Figures 11 to 14 , the ratio of the combined thickness of the first encapsulation layer EN1 and the second encapsulation layer EN2 to the thickness of the dam layer BL is in the range of 3:11 to 6:10. In a specific example, the thickness of the first encapsulation layer EN1 is in the range of 3 μm to 6 μm.

[0120] In some embodiments, the thickness of the first encapsulation layer EN1 is greater than the thickness of the second encapsulation layer EN2. Optionally, the thickness of the first organic encapsulation sub-layer ENL2 of the first encapsulation layer EN1 is greater than the thickness of the organic encapsulation sub-layer of the second encapsulation layer EN2.

[0121] Figures 15A to 15E Shows a process of manufacturing a color conversion substrate according to some embodiments of the present disclosure. Refer to Figure 15A , a dam layer BL is formed, and a plurality of first openings AP1 and a plurality of second openings AP2 extending through the dam layer BL are formed. The plurality of first openings AP1 and the plurality of second openings AP2 are formed in the display area of the color conversion substrate.

[0122] In some embodiments, a second cover layer is formed before forming the dam layer BL. The dam layer BL is formed on the second cover layer.

[0123] Refer to Figure 15B , a plurality of color conversion blocks including a first color conversion block CCB1 and a second color conversion block CCB2 and a plurality of light scattering blocks LSB are at least partially formed in the plurality of first openings AP1. The plurality of color conversion blocks and the plurality of light scattering blocks LSB are not formed in the plurality of second openings AP2.

[0124] Subsequently, a first cover layer is formed on the side of the plurality of color conversion blocks, the plurality of light scattering blocks LSB and the dam layer BL away from the second cover layer.

[0125] Refer to Figure 15C , a first color filter layer CF1 of a first color is formed on the side of the first cover layer away from the plurality of color conversion blocks, the plurality of light scattering blocks LSB and the dam layer BL. A plurality of first color filter openings CF1AP extend through the first color filter layer CF1 of the first color. The first color filter layer CF1 of the first color is formed in at least one of the plurality of first openings AP1, and the plurality of first openings AP1 at least partially accommodate the first color conversion block CCB1, the second color conversion block CCB2 or the corresponding light scattering block in the plurality of light scattering blocks LSB. In Figure 15C , the first color filter layer CF1 of the first color is formed in the first opening of the plurality of first openings AP1 that at least partially accommodates the first color conversion block CCB1. In the first openings of the plurality of first openings AP1 that at least partially accommodate the second color conversion block CCB2 and the corresponding light scattering block in the plurality of light scattering blocks LSB, the first color filter layer CF1 of the first color is at least partially excluded (e.g., completely excluded). The plurality of first color filter openings CF1AP expose the second color conversion block CCB2 and the corresponding light scattering block in the plurality of light scattering blocks LSB.

[0126] The first color filter layer CF1 of the first color is formed in the plurality of second openings AP2. The first color filter layer CF1 of the first color is also at least partially formed in the non-light-transmitting region NTR having the dam layer BL.

[0127] Refer to Figure 15D , a second color filter layer CF2 of the second color is formed on the side of the first color filter layer CF1 of the first color away from the first cover layer. A plurality of second color filter openings CF2AP extend through the second color filter layer CF2 of the second color. The second color filter layer CF2 of the second color is formed in at least one of the plurality of first openings AP1, and the plurality of first openings AP1 at least partially accommodate the corresponding light-scattering block in the first color conversion block CCB1, the second color conversion block CCB2, or the plurality of light-scattering blocks LSB. In Figure 15D , the second color filter layer CF2 of the second color is formed in the first opening of the plurality of first openings AP1 that at least partially accommodates the second color conversion block CCB2. In the first opening of the plurality of first openings AP1 that at least partially accommodates the first color conversion block CCB1 and the corresponding light-scattering block in the plurality of light-scattering blocks LSB, the second color filter layer CF2 of the second color is at least partially excluded (e.g., completely excluded). The plurality of second color filter openings CF2AP expose a part of the first color filter CF1 of the first color on the first color conversion block CCB1 and the corresponding light-scattering block in the plurality of light-scattering blocks LSB.

[0128] The second color filter layer CF2 of the second color is formed on a part of the first color filter CF1 of the first color in the plurality of second openings AP2. The second color filter layer CF2 of the second color is also at least partially formed in the non-light-transmitting region NTR having the dam layer BL.

[0129] See Figure 15E , a third color filter layer CF3 of the third color is formed on the side of the second color filter layer CF2 of the second color away from the first color filter layer CF1 of the first color. A plurality of third color filter openings CF3AP extend through the third color filter layer CF3 of the third color. The third color filter layer CF3 of the third color is formed in at least one of the plurality of first openings AP1, and the plurality of first openings AP1 at least partially accommodate the corresponding light-scattering block in the first color conversion block CCB1, the second color conversion block CCB2, or the plurality of light-scattering blocks LSB. In Figure 15EAmong them, the third color filter layer CF3 of the third color is formed in the first openings among the plurality of first openings AP1 that at least partially accommodate the corresponding light scattering blocks among the plurality of light scattering blocks LSB. In the first openings among the plurality of first openings AP1 that at least partially accommodate the first color conversion block CCB1 and the second color conversion block CCB2, the third color filter layer CF3 of the third color is at least partially excluded (for example, completely excluded). A plurality of third color filter openings CF3AP expose a part of the first color filter CF1 of the first color on the first color conversion block CCB1 and a part of the second color filter CF2 of the second color on the second color conversion block CCB2.

[0130] On one side of a part of the second color filter layer CF2 of the second color away from a part of the first color filter CF1 of the first color in the plurality of second openings AP2, the third color filter layer CF3 of the third color is formed. The third color filter layer CF3 of the third color is also at least partially formed in the non-light-transmitting region NTR having the dam layer BL.

[0131] Figure 16 is a cross-sectional view of a display panel according to some embodiments of the present disclosure. For example, Figure 16 may be a cross-sectional view along Figure 10 the D-D' line in the display panel shown. Figure 17 shows a plurality of first openings and a plurality of second openings in a color conversion substrate according to some embodiments of the present disclosure. Figure 18 shows the color filters in a color conversion substrate according to some embodiments of the present disclosure. Referring to Figures 16 to 18 , in some embodiments, the color filter CF includes a first color filter layer CF1 of a first color; a second color filter layer CF2 of a second color, which is located on the first color filter layer CF1 of the first color; and a third color filter layer CF3 of a third color, which is located on a side of the second color filter layer CF2 of the second color away from the first color filter layer CF1 of the first color. In some embodiments, the first color, the second color, and the third color are three different colors selected from green, red, and blue. In one example, the first color is green, the second color is red, and the third color is blue.

[0132] In some embodiments, in at least a portion of the non-light-transmitting region NTR between two adjacent light-transmitting regions (e.g., between the first light-transmitting region LTR1 and the second light-transmitting region LTR2, or between the second light-transmitting region LTR2 and the third light-transmitting region LTR3, or between the first light-transmitting region LTR1 and the third light-transmitting region LTR3), the color conversion substrate includes a stacked structure that includes at least two of the following: a portion of the first color filter layer CF1 of a first color; a portion of the second color filter layer CF2 of a second color, which is located on a portion of the first color filter layer CF1 of the first color; or a portion of the third color filter layer CF3 of a third color, which is located on a side of the portion of the second color filter layer CF2 of the second color away from the portion of the first color filter layer CF1 of the first color. Optionally, in at least a portion of the non-light-transmitting region NTR between two adjacent light-transmitting regions, the color conversion substrate includes a stacked structure that includes: a portion of the first color filter layer CF1 of a first color; a portion of the second color filter layer CF2 of a second color, which is located on a portion of the first color filter layer CF1 of the first color; or a portion of the third color filter layer CF3 of a third color, which is located on a side of the portion of the second color filter layer CF2 of the second color away from the portion of the first color filter layer CF1 of the first color. The stacked structure in a portion of the non-light-transmitting region NTR serves as a light-blocking black matrix.

[0133] In some embodiments, in at least a portion of the non-light-transmitting region NTR including the respective dummy sub-pixels among a plurality of dummy sub-pixels dsp, the color conversion substrate includes a stacked structure that includes at least two of the following: a portion of the first color filter layer CF1 of a first color; a portion of the second color filter layer CF2 of a second color, which is located on a portion of the first color filter layer CF1 of the first color; or a portion of the third color filter layer CF3 of a third color, which is located on a side of the portion of the second color filter layer CF2 of the second color away from the portion of the first color filter layer CF1 of the first color. Optionally, in at least a portion of the non-light-transmitting region NTR including the respective dummy sub-pixels among a plurality of dummy sub-pixels dsp, the color conversion substrate includes a stacked structure that includes: a portion of the first color filter layer CF1 of a first color; a portion of the second color filter layer CF2 of a second color, which is located on a portion of the first color filter layer CF1 of the first color; or a portion of the third color filter layer CF3 of a third color, which is located on a side of the portion of the second color filter layer CF2 of the second color away from the portion of the first color filter layer CF1 of the first color.

[0134] In some embodiments, each of the plurality of dummy sub-pixels dsp is located between two adjacent pixels. In one example, each of the two adjacent pixels includes a first sub-pixel among the plurality of first sub-pixels sp1, a second sub-pixel among the plurality of second sub-pixels sp2, and a third sub-pixel among the plurality of third sub-pixels sp3. Each dummy sub-pixel is configured to absorb light emitted from at least one of the two adjacent pixels. The inventors of the present disclosure have found that by providing a plurality of dummy sub-pixels dsp, light leakage between adjacent pixels can be effectively prevented, thereby improving the color characteristics of the color conversion substrate and the display panel.

[0135] In some embodiments, each of the plurality of second openings AP2 is configured to accommodate at least one of the following: a part of the first color filter layer CF1 of the first color; a part of the second color filter layer CF2 of the second color; or a part of the third color filter layer CF3 of the third color. In a specific example, each second opening is configured to accommodate a part of the first color filter layer CF1 of the first color and a part of the second color filter layer CF2 of the second color. The following part is located outside the corresponding second opening: a part of the third color filter layer CF3 of the third color, which is located on the side of the part of the second color filter layer CF2 of the second color away from the part of the first color filter layer CF1 of the first color. Optionally, another part of the second color filter layer CF2 of the second color is outside the corresponding second opening. For example, a part of the second color filter layer CF2 of the second color is partially inside the corresponding second opening and partially outside the corresponding second opening. The part of the first color filter layer CF1 of the first color inside the corresponding second opening is in direct contact with the part of the first cover layer CAP1 inside the corresponding second opening.

[0136] Compare Figure 16 the color filter CF shown Figure 12 with the color filter CF shown Figure 16 The thickness of the first color filter layer CF1 of the first color of the color filter CF shown Figure 12 is less than the thickness of the first color filter layer CF1 of the first color of the color filter CF shown Figure 10 The first color filter layer CF1 of the first color of the color filter CF shown completely fills the corresponding second opening, while Figure 16 the first color filter layer CF1 of the first color of the color filter CF shown only partially fills the corresponding second opening. Therefore, Figure 16 a part of the second color filter layer CF2 of the second color of the color filter CF depicted in is partially filled in the corresponding second opening.

[0137] Figure 19 is a cross-sectional view of a display panel according to some embodiments of the present disclosure. For example, Figure 19 it may be a cross-sectional view along the D-D' line in the display panel shown Figure 10 Figure 20 ​Shows a plurality of first openings and a plurality of second openings in a color conversion substrate according to some embodiments of the present disclosure. Figure 21 Shows a color filter film in a color conversion substrate according to some embodiments of the present disclosure. Refer to Figures 19 to 21 , in some embodiments, the color filter film CF includes a first color filter layer CF1 of a first color; a second color filter layer CF2 of a second color, which is located on the first color filter layer CF1 of the first color; and a third color filter layer CF3 of a third color, which is located on a side of the second color filter layer CF2 of the second color away from the first color filter layer CF1 of the first color. In some embodiments, the first color, the second color, and the third color are three different colors selected from green, red, and blue. In one example, the first color is green, the second color is red, and the third color is blue.

[0138] In some embodiments, in at least a portion of the non-light-transmitting region NTR between two adjacent light-transmitting regions (e.g., between the first light-transmitting region LTR1 and the second light-transmitting region LTR2, or between the second light-transmitting region LTR2 and the third light-transmitting region LTR3, or between the first light-transmitting region LTR1 and the third light-transmitting region LTR3), the color conversion substrate includes a stacked structure, which includes at least two of the following: a portion of the first color filter layer CF1 of the first color; a portion of the second color filter layer CF2 of the second color, which is located on the portion of the first color filter layer CF1 of the first color; or a portion of the third color filter layer CF3 of the third color, which is located on a side of the portion of the second color filter layer CF2 of the second color away from the portion of the first color filter layer CF1 of the first color. Optionally, in at least a portion of the non-light-transmitting region NTR between two adjacent light-transmitting regions, the color conversion substrate includes a stacked structure, which includes: a portion of the first color filter layer CF1 of the first color; a portion of the second color filter layer CF2 of the second color, which is located on the portion of the first color filter layer CF1 of the first color; or a portion of the third color filter layer CF3 of the third color, which is located on a side of the portion of the second color filter layer CF2 of the second color away from the portion of the first color filter layer CF1 of the first color. The stacked structure in a portion of the non-light-transmitting region NTR serves as a light-blocking black matrix.

[0139] In some embodiments, in a part of a non-transmissive region NTR of a corresponding dummy sub-pixel among a plurality of dummy sub-pixels dsp, the color conversion substrate includes a stacked structure, and the stacked structure includes at least two of the following: a part of a first color filter layer CF1 of a first color; a part of a second color filter layer CF2 of a second color, which is located on a part of the first color filter layer CF1 of the first color; or a part of a third color filter layer CF3 of a third color, which is located on a side of a part of the second color filter layer CF2 of the second color away from a part of the first color filter layer CF1 of the first color. Optionally, in a part of a non-transmissive region NTR of a corresponding dummy sub-pixel among a plurality of dummy sub-pixels dsp, the color conversion substrate includes a stacked structure, and the stacked structure includes: a part of a first color filter layer CF1 of a first color; a part of a second color filter layer CF2 of a second color, which is located on a part of the first color filter layer CF1 of the first color; or a part of a third color filter layer CF3 of a third color, which is located on a side of a part of the second color filter layer CF2 of the second color away from a part of the first color filter layer CF1 of the first color.

[0140] In some embodiments, each of the plurality of dummy sub-pixels dsp is located between two adjacent pixels. In one example, each of the two adjacent pixels includes a first sub-pixel among a plurality of first sub-pixels sp1, a second sub-pixel among a plurality of second sub-pixels sp2, and a third sub-pixel among a plurality of third sub-pixels sp3. Each dummy sub-pixel is configured to absorb light emitted from at least one of the two adjacent pixels. The inventors of the present disclosure have found that by providing a plurality of dummy sub-pixels dsp, light leakage between adjacent pixels can be effectively prevented, thereby improving the color characteristics of the color conversion substrate and the display panel.

[0141] In some embodiments, each of the plurality of second openings AP2 is configured to accommodate at least one of the following: a part of a first color filter layer CF1 of a first color; a part of a second color filter layer CF2 of a second color; or a part of a third color filter layer CF3 of a third color. In a specific example, each second opening is configured to accommodate a part of a first color filter layer CF1 of a first color, a part of a second color filter layer CF2 of a second color, and a part of a third color filter layer CF3 of a third color. Optionally, another part of the second color filter layer CF2 of the second color is outside the corresponding second opening. For example, a part of the second color filter layer CF2 of the second color is partially inside and partially outside the corresponding second opening. Optionally, another part of the third color filter layer CF3 of the third color is outside the corresponding second opening. For example, a part of the third color filter layer CF3 of the third color is partially inside and partially outside the corresponding second opening. A part of the first color filter layer CF1 of the first color inside the corresponding second opening is in direct contact with a part of the first cover layer CAP1 inside the corresponding second opening.

[0142] Compare the color conversion substrate shown in Figure 19 with the color conversion substrate shown in Figure 12 and the color conversion substrate shown in Figure 16 . The color conversion substrate shown in Figure 19 includes three parts of color filter layers of three different colors to enhance the light leakage blocking ability of each dummy sub-pixel.

[0143] Figure 22 is a cross-sectional view of a display panel according to some embodiments of the present disclosure. For example, Figure 22 may be a cross-sectional view along the D-D' line in the display panel depicted in Figure 10 . Referring to Figure 22 , in some embodiments, the color conversion substrate CS includes a second cover layer CAP2 located on the first encapsulation layer EN1, a dam layer BL defining a plurality of first openings, a color conversion layer CCL and a light scattering layer LSL at least partially located in the plurality of first openings defined by the dam layer BL. The color conversion layer CCL includes a plurality of color conversion blocks CCB, and the plurality of color conversion blocks CCB include a first color conversion block CCB1 of a first color and a second color conversion block CCB2 of a second color. The light scattering layer LSL includes a plurality of light scattering blocks LSB.

[0144] In some embodiments, the color conversion substrate CS further includes a plurality of second openings extending through the dam layer BL. Figure 23 shows a plurality of first openings and a plurality of second openings in the color conversion substrate according to some embodiments of the present disclosure. Referring to Figure 22 and Figure 23 , the plurality of first openings AP1 and the plurality of second openings AP2 are located in the display area DA of the color conversion substrate CS. In some embodiments, the plurality of first openings AP1 are configured to accommodate the plurality of color conversion blocks CCB and the plurality of light scattering blocks LSB. The plurality of color conversion blocks CCB and the plurality of light scattering blocks LSB are not present in the plurality of second openings AP2.

[0145] In some embodiments, the display panel includes a plurality of first sub-pixels sp1, a plurality of second sub-pixels sp2, a plurality of third sub-pixels sp3, and a plurality of dummy sub-pixels dsp. Each sub-pixel among the plurality of first sub-pixels sp1, the plurality of second sub-pixels sp2, or the plurality of third sub-pixels sp3 includes each light-emitting element among the plurality of light-emitting elements LE. The plurality of light-emitting elements LE are not present in the plurality of dummy sub-pixels dsp.

[0146] In some embodiments, the display panel includes a first light-transmitting region LTR1 in a first sub-pixel sp1, a second light-transmitting region LTR2 in a second sub-pixel sp2, a third light-transmitting region LTR3 in a third sub-pixel sp3, and a non-light-transmitting region NTR. In some embodiments, the color conversion layer CCL includes a plurality of color conversion blocks CCB, which includes a first color conversion block CCB1 and a second color conversion block CCB2. The light scattering layer includes a plurality of light scattering blocks LSB. The first color conversion block CCB1 is at least partially located in the first light-transmitting region LTR1. The second color conversion block CCB2 is at least partially located in the second light-transmitting region LTR2. Each of the plurality of light scattering blocks LSB is at least partially located in the third light-transmitting region LTR3.

[0147] In some embodiments, the display panel includes a dam layer BL located in the non-light-transmitting region NTR. In some embodiments, a plurality of dummy sub-pixels dsp are located in the non-light-transmitting region NTR.

[0148] In some embodiments, the color conversion substrate CS further includes a first cover layer CAP1 on a side of the dam layer BL, the color conversion layer CCL, and the light scattering layer LSL away from the second cover layer CAP2. In some embodiments, the first cover layer CAP1 includes an inorganic insulating material. In some embodiments, the second cover layer CAP2 includes an inorganic insulating material.

[0149] In some embodiments, the first cover layer CAP1 is in direct contact with the plurality of color conversion blocks CCB and in direct contact with the plurality of light scattering blocks LSB. In some embodiments, a part of the first cover layer CAP1 is located in a corresponding second opening among the plurality of second openings AP2. In some embodiments, the part of the first cover layer CAP1 in the corresponding second opening is in direct contact with the second cover layer CAP2. Optionally, the first cover layer CAP1 is in direct contact with the dam layer BL.

[0150] In some embodiments, the second cover layer CAP2 is in direct contact with the plurality of color conversion blocks CCB and in direct contact with the plurality of light scattering blocks LSB. Optionally, the second cover layer CAP2 is in direct contact with the dam layer BL.

[0151] In some embodiments, the color conversion substrate CS further includes a color filter CF and a black matrix BM on a side of the first cover layer CAP1 away from the dam layer BL, the color conversion layer CCL, and the light scattering layer LSL. The color filter CF includes a plurality of color filter blocks CFB. The orthographic projection of each of the plurality of color filter blocks CFB on the substrate substrate at least partially overlaps with the orthographic projection of the corresponding color conversion block or the corresponding light scattering block on the substrate substrate. The orthographic projections of adjacent color filter blocks may partially overlap with each other along the edges, for example.

[0152] In some embodiments, the black matrix BM is at least partially located in the non-transmissive region NTR. In some embodiments, the black matrix BM is at least partially located in at least a portion of the non-transmissive region NTR between two adjacent light-transmissive regions (e.g., between the first light-transmissive region LTR1 and the second light-transmissive region LTR2, or between the second light-transmissive region LTR2 and the third light-transmissive region LTR3, or between the first light-transmissive region LTR1 and the third light-transmissive region LTR3). In some embodiments, the black matrix BM is at least partially located in a portion of the non-transmissive region NTR that includes corresponding dummy sub-pixels among a plurality of dummy sub-pixels dsp.

[0153] In some embodiments, the first cover layer CAP1 is in direct contact with the color filter CF and the black matrix BM. The inventors of the present disclosure have found that by making the first cover layer CAP1 in direct contact with the color filter CF, in direct contact with the black matrix BM, in direct contact with a plurality of color conversion blocks CCB, and in direct contact with a plurality of light scattering blocks LSB, the optical distance between the color filter and the color conversion layer CCL can be reduced, the color shift problem can be prevented, and the display quality can be improved.

[0154] In some embodiments, the second cover layer CAP2 is in direct contact with the first encapsulation layer EN1.

[0155] In some embodiments, the plurality of color filter blocks CFB include a first color filter block CFB1, a second color filter block CFB2, and a third color filter block CFB3. The orthographic projection of the first color filter block CFB1 on the substrate at least partially overlaps with the orthographic projection of the first color conversion block CCB1 on the substrate. The orthographic projection of the second color filter block CFB2 on the substrate at least partially overlaps with the orthographic projection of the second color conversion block CCB2 on the substrate. The orthographic projection of the third color filter block CFB3 on the substrate at least partially overlaps with the orthographic projection of the corresponding light scattering block among the plurality of light scattering blocks LSB on the substrate.

[0156] Figure 24 The color filter in the color conversion substrate according to some embodiments of the present disclosure is shown. Refer to Figures 22 to 24 , in some embodiments, the color filter CF includes a first color filter layer CF1 of a first color; a second color filter layer CF2 of a second color, which is located on the first color filter layer CF1 of the first color; and a third color filter layer CF3 of a third color, which is located on a side of the second color filter layer CF2 of the second color away from the first color filter layer CF1 of the first color. In some embodiments, the first color, the second color, and the third color are three different colors selected from green, red, and blue. In one example, the first color is green, the second color is red, and the third color is blue.

[0157] In some embodiments, in at least a portion of the light-blocking region NTR between two adjacent light-transmitting regions (e.g., between the first light-transmitting region LTR1 and the second light-transmitting region LTR2, or between the second light-transmitting region LTR2 and the third light-transmitting region LTR3, or between the first light-transmitting region LTR1 and the third light-transmitting region LTR3), the color conversion substrate includes a portion of the black matrix BM. Optionally, in at least a portion of the light-blocking region NTR between two adjacent light-transmitting regions, the color conversion substrate includes a stacked structure that includes a portion of the black matrix BM and at least two of the following: a portion of the first color film layer CF1 located on a portion of the black matrix BM; a portion of the second color film layer CF2; or a portion of the third color film layer CF3. Optionally, in at least a portion of the light-blocking region NTR between the first light-transmitting region LTR1 and the second light-transmitting region LTR2, the color conversion substrate includes a stacked structure that includes a portion of the black matrix BM, a portion of the first color film layer CF1 of the first color located on a portion of the black matrix BM, and a portion of the second color film layer CF2 of the second color. Optionally, in at least a portion of the light-blocking region NTR between the second light-transmitting region LTR2 and the third light-transmitting region LTR3, the color conversion substrate includes a stacked structure that includes a portion of the black matrix BM, a portion of the second color film layer CF2 of the second color located on a portion of the black matrix BM, and a portion of the third color film layer CF3 of the third color. Optionally, in at least a portion of the light-blocking region NTR between the first light-transmitting region LTR1 and the third light-transmitting region LTR3, the color conversion substrate includes a stacked structure that includes a portion of the black matrix BM, a portion of the first color film layer CF1 of the first color located on a portion of the black matrix BM, and a portion of the third color film layer CF3 of the third color.

[0158] In some embodiments, in a portion of the light-blocking region NTR that includes corresponding dummy sub-pixels among a plurality of dummy sub-pixels dsp, the color conversion substrate includes a portion of the black matrix BM. Optionally, in a portion of the light-blocking region NTR that includes corresponding dummy sub-pixels among a plurality of dummy sub-pixels dsp, the color conversion substrate includes a stacked structure that includes a portion of the black matrix BM and at least one of the following: a portion of the first color film layer CF1; a portion of the second color film layer CF2; or a portion of the third color film layer CF3. Optionally, in a portion of the light-blocking region NTR that includes corresponding dummy sub-pixels among a plurality of dummy sub-pixels dsp, the color conversion substrate includes a stacked structure that includes a portion of the black matrix BM and a portion of the third color film layer CF3.

[0159] In some embodiments, each of the plurality of dummy sub-pixels dsp is located between two adjacent pixels. In one example, each of the two adjacent pixels includes a first sub-pixel among the plurality of first sub-pixels sp1, a second sub-pixel among the plurality of second sub-pixels sp2, and a third sub-pixel among the plurality of third sub-pixels sp3. Each of the dummy sub-pixels is configured to absorb light emitted from at least one of the two adjacent pixels. The inventors of the present disclosure have found that by providing the plurality of dummy sub-pixels dsp, light leakage between adjacent pixels can be effectively prevented, thereby improving the color characteristics of the color conversion substrate and the display panel.

[0160] In some embodiments, each of the plurality of second openings AP2 is configured to receive a portion of the black matrix BM. The portion of the black matrix BM in each of the second openings is in direct contact with the portion of the first cover layer CAP1 in the corresponding second opening.

[0161] Figure 25 is a cross-sectional view of a display panel according to some embodiments of the present disclosure. For example, Figure 25 may be a cross-sectional view along Figure 10 the D-D' line in the display panel shown. Figure 26 Shows a plurality of first openings and a plurality of second openings in a color conversion substrate according to some embodiments of the present disclosure. Figure 27 Shows a color filter in a color conversion substrate according to some embodiments of the present disclosure. Refer to Figures 25 to 27 , in some embodiments, the color filter CF includes a first color filter layer CF1 of a first color; a second color filter layer CF2 of a second color, which is located on the first color filter layer CF1 of the first color; and a third color filter layer CF3 of a third color, which is located on a side of the second color filter layer CF2 of the second color away from the first color filter layer CF1 of the first color. In some embodiments, the first color, the second color, and the third color are three different colors selected from green, red, and blue. In one example, the first color is green, the second color is red, and the third color is blue.

[0162] In some embodiments, in at least a portion of a non-light-transmitting region NTR between two adjacent light-transmitting regions (e.g., between a first light-transmitting region LTR1 and a second light-transmitting region LTR2, or between the second light-transmitting region LTR2 and a third light-transmitting region LTR3, or between the first light-transmitting region LTR1 and the third light-transmitting region LTR3), the color conversion substrate includes a stacked structure that includes at least two of the following: a portion of a first color filter layer CF1 of a first color; a portion of a second color filter layer CF2 of a second color, which is located on the portion of the first color filter layer CF1 of the first color; or a portion of a third color filter layer CF3 of a third color, which is located on a side of the portion of the second color filter layer CF2 of the second color away from the portion of the first color filter layer CF1 of the first color. Optionally, in at least a portion of the non-light-transmitting region NTR between two adjacent light-transmitting regions, the color conversion substrate includes a stacked structure that includes: a portion of a first color filter layer CF1 of a first color; a portion of a second color filter layer CF2 of a second color, which is located on the portion of the first color filter layer CF1 of the first color; or a portion of a third color filter layer CF3 of a third color, which is located on a side of the portion of the second color filter layer CF2 of the second color away from the portion of the first color filter layer CF1 of the first color. The stacked structure in a portion of the non-light-transmitting region NTR serves as a light-blocking black matrix.

[0163] In some embodiments, in a portion of a non-light-transmitting region NTR including corresponding dummy sub-pixels among a plurality of dummy sub-pixels dsp, the color conversion substrate includes at least two of the following: a portion of a first color filter layer CF1 of a first color; a portion of a second color filter layer CF2 of a second color; or a portion of a third color filter layer CF3 of a third color. Optionally, in a portion of a non-light-transmitting region NTR including corresponding dummy sub-pixels among a plurality of dummy sub-pixels dsp, the color conversion substrate includes a portion of a first color filter layer CF1 of a first color and a portion of a second color filter layer CF2 of a second color.

[0164] In some embodiments, each of the plurality of dummy sub-pixels dsp is located between two adjacent pixels. In one example, each of the two adjacent pixels includes a first sub-pixel among a plurality of first sub-pixels sp1, a second sub-pixel among a plurality of second sub-pixels sp2, and a third sub-pixel among a plurality of third sub-pixels sp3. Each dummy sub-pixel is configured to absorb light emitted from at least one of the two adjacent pixels. The inventors of the present disclosure have found that by providing a plurality of dummy sub-pixels dsp, light leakage between adjacent pixels can be effectively prevented, thereby improving the color characteristics of the color conversion substrate and the display panel.

[0165] In some embodiments, each of the plurality of second openings AP2 is configured to receive at least one of the following: a portion of a first color filter layer CF1 of a first color; a portion of a second color filter layer CF2 of a second color; or a portion of a third color filter layer CF3 of a third color. In a specific example, each second opening is configured to receive a portion of a first color filter layer CF1 of a first color; and a portion of a second color filter layer CF2 of a second color. A portion of a third color filter layer CF3 of a third color is outside the corresponding second opening. Optionally, a portion of the first color filter layer CF1 of the first color is inside the corresponding second opening and a portion is outside the corresponding second opening. Optionally, a portion of the second color filter layer CF2 of the second color is inside the corresponding second opening and a portion is outside the corresponding second opening. The portion of the first color filter layer CF1 of the first color inside the corresponding second opening is in direct contact with the portion of the first cover layer CAP1 inside the corresponding second opening. The portion of the second color filter layer CF2 of the second color inside the corresponding second opening is in direct contact with the portion of the first cover layer CAP1 inside the corresponding second opening

[0166] In some embodiments, the first color is green, the second color is red, and the third color is blue.

[0167] In alternative embodiments, the first color is red, the second color is green, and the third color is blue.

[0168] In some embodiments, along a plane intersecting two adjacent color filter blocks and perpendicular to the surface of the first encapsulation layer EN1, a portion (e.g., the first color filter block CFB1) of the first color filter layer CF1 of the first color has a first thickness t1, and this portion is located in a part of the light-transmitting region including one of the plurality of first openings; a portion of the first color filter layer CF1 of the first color has a second thickness t2, and this portion is located in a part of the non-light-transmitting region including one of the plurality of second openings. Optionally, the second thickness t2 is greater than the first thickness t1. In some embodiments, along a plane intersecting two adjacent color filter blocks and perpendicular to the surface of the first encapsulation layer EN1, the dam layer BL has a third thickness t3. Optionally, the difference between the second thickness t2 and the first thickness t1 is substantially the same as the third thickness t3. As used herein, the term "substantially the same" means that the difference between two values does not exceed 10% of the base value (e.g., one of the two values), such as not exceeding 8% of the base value, not exceeding 6%, not exceeding 4%, not exceeding 2%, not exceeding 1%, not exceeding 0.5%, not exceeding 0.1%, not exceeding 0.05%, and not exceeding 0.01%.

[0169] In some embodiments, for a part (e.g., the first color film block CFB1) of the first color film layer CF1 in a part of the light-transmitting region including one of the plurality of first openings, the surface of this part on the side away from the surface of the first encapsulation layer EN1 has a first relative height rh1 with respect to the surface of the first encapsulation layer EN1, and for a part of the first color film layer CF1 in a part of the light-blocking region including one of the plurality of second openings, the surface of this part on the side away from the surface of the first encapsulation layer EN1 has a second relative height rh2 with respect to the surface of the first encapsulation layer EN1. Optionally, the first relative height rh1 and the second relative height rh2 are substantially the same.

[0170] In some embodiments, along a plane intersecting two adjacent color film blocks and perpendicular to the surface of the first encapsulation layer EN1, a part (e.g., the second color film block CFB2) of the second color film layer CF2 has a fourth thickness t4, and this part is located in a part of the light-transmitting region including one of the plurality of first openings; a part of the second color film layer CF2 has a fifth thickness t5, and this part is located in a part of the light-blocking region including one of the plurality of second openings. Optionally, the fifth thickness t5 is greater than the fourth thickness t4. In some embodiments, along a plane intersecting two adjacent color film blocks and perpendicular to the surface of the first encapsulation layer EN1, the dam layer BL has a third thickness t3. Optionally, the difference between the fifth thickness t5 and the fourth thickness t4 is substantially the same as the third thickness t3.

[0171] In some embodiments, for a part (e.g., the second color film block CFB2) of the second color film layer CF2 in a part of the light-transmitting region including one of the plurality of first openings, the surface of this part on the side away from the surface of the first encapsulation layer EN1 has a third relative height rh3 with respect to the surface of the first encapsulation layer EN1, and for a part of the second color film layer CF2 in a part of the light-blocking region including one of the plurality of second openings, the surface of this part on the side away from the surface of the first encapsulation layer EN1 has a fourth relative height rh4 with respect to the surface of the first encapsulation layer EN1. Optionally, the third relative height rh3 and the fourth relative height rh4 are substantially the same.

[0172] Figure 28 Shows the sub-pixel arrangement in the display panel according to some embodiments of the present disclosure. Figure 29 Shows the sub-pixel arrangement in the display panel according to some embodiments of the present disclosure. Figure 30 Shows the sub-pixel arrangement in the display panel according to some embodiments of the present disclosure. Figure 31Shows the sub-pixel arrangement in a display panel according to some embodiments of the present disclosure. In Figures 28 to 31 the shown display panel, a plurality of first sub-pixels sp1, a plurality of second sub-pixels sp2, a plurality of third sub-pixels sp3, and a plurality of dummy sub-pixels dsp are shown.

[0173] Figure 32 is a plan view of a display panel according to some embodiments of the present disclosure. Figure 33 is a cross-sectional view along the Figure 32 E-E' line in Figure 32 and Figure 33 , in some embodiments, the display panel includes a display area DA and a non-display area NDA. In the display area DA, as described above, the display panel includes a plurality of first openings and a plurality of second openings AP2. In the non-display area NDA, in some embodiments, the display panel includes a groove GV that at least partially extends into (e.g., extends through) the dam layer BL. The groove GV is located in the non-display area NDA.

[0174] In some embodiments, the groove GV substantially (e.g., at least 50%, at least 60%, at least 70%, at least 80%, at least 90%, at least 95%, at least 99% or 100%) surrounds the display area DA.

[0175] In some embodiments, the display panel further includes a plurality of third openings AP3 that at least partially extend into (e.g., extend through) the dam layer BL. The plurality of third openings AP3 are located in the non-display area NDA. In some embodiments, the combination of the plurality of third openings AP3 substantially (e.g., at least 50%, at least 60%, at least 70%, at least 80%, at least 90%, at least 95%, at least 99% or 100%) surrounds the display area DA.

[0176] In some embodiments, the groove GV substantially (e.g., at least 50%, at least 60%, at least 70%, at least 80%, at least 90%, at least 95%, at least 99% or 100%) surrounds the plurality of third openings AP3.

[0177] In some embodiments, the groove GV is configured to prevent the overflow of encapsulation material (e.g., organic encapsulation material) during the manufacture of the display panel. In some embodiments, a part of the second encapsulation layer EN2 (e.g., at least a part of the organic encapsulation sub-layer of the second encapsulation layer EN2) is at least partially located within the groove GV. In some embodiments, the part of the second encapsulation layer EN2 that is at least partially within the groove GV (e.g., the part of the organic encapsulation sub-layer of the second encapsulation layer EN2) is in direct contact with the first cover layer CAP1.

[0178] In some embodiments, a portion of the second encapsulation layer EN2 (e.g., at least a portion of the organic encapsulation sub-layer of the second encapsulation layer EN2) is at least partially located within a respective third opening among the plurality of third openings AP3. In some embodiments, the portion of the second encapsulation layer EN2 that is at least partially within the respective third opening (e.g., the portion of the organic encapsulation sub-layer of the second encapsulation layer EN2) is in direct contact with the first cover layer CAP1.

[0179] Figure 34 is a plan view of a display panel according to some embodiments of the present disclosure. Figure 35 is along Figure 34 the cross-sectional view taken along the F-F’ line in Figure 34 and Figure 35 , in some embodiments, the display panel includes a display area DA and a non-display area NDA. In the display area DA, as described above, the display panel includes a plurality of first openings and a plurality of second openings AP2. In the non-display area NDA, in some embodiments, the display panel includes a groove GV that at least partially extends into the dam layer BL (e.g., extends through the dam layer BL). The groove GV is located in the non-display area NDA.

[0180] In some embodiments, the groove GV substantially (e.g., at least 50%, at least 60%, at least 70%, at least 80%, at least 90%, at least 95%, at least 99% or 100%) surrounds the display area DA.

[0181] In some embodiments, the display panel further includes a plurality of third openings AP3 that at least partially extend into the dam layer BL (e.g., extend through the dam layer BL). The plurality of third openings AP3 are located in the non-display area NDA. In some embodiments, the combination of the plurality of third openings AP3 substantially (e.g., at least 50%, at least 60%, at least 70%, at least 80%, at least 90%, at least 95%, at least 99% or 100%) surrounds the display area DA.

[0182] In some embodiments, the groove GV substantially (e.g., at least 50%, at least 60%, at least 70%, at least 80%, at least 90%, at least 95%, at least 99% or 100%) surrounds the plurality of third openings AP3.

[0183] In some embodiments, the groove GV is configured to prevent the overflow of encapsulation material (e.g., organic encapsulation material) during the manufacture of the display panel. In some embodiments, a portion of the second encapsulation layer EN2 (e.g., at least a portion of the organic encapsulation sub-layer of the second encapsulation layer EN2) is at least partially located within the groove GV. In some embodiments, the portion of the second encapsulation layer EN2 that is at least partially within the groove GV (e.g., the portion of the organic encapsulation sub-layer of the second encapsulation layer EN2) is in direct contact with the first cover layer CAP1.

[0184] In some embodiments, in a plurality of third openings AP3, there is substantially (e.g., at least 50%, at least 60%, at least 70%, at least 80%, at least 90%, at least 95%, at least 99% or 100%) no at least the organic encapsulation sub-layer of the second encapsulation layer EN2 (e.g., the entirety of the second encapsulation layer EN2). In some embodiments, the first cover layer CAP1 spaces the second encapsulation layer EN2 from the plurality of third openings AP3. The first cover layer CAP1 forms the top surface of the plurality of third openings AP3.

[0185] In some embodiments, the display panel further includes quantum dot material that is at least partially within a respective third opening of the plurality of third openings AP3. Optionally, the quantum dot material that is at least partially within the respective third opening is the same as the color conversion material for forming the color conversion layer. By having the quantum dot material at least partially within the respective third opening of the plurality of third openings AP3, consistency in the printing process of the color conversion layer can be achieved.

[0186] In some embodiments, the quantum dot material that is at least partially within the respective third opening is in direct contact with the first cover layer CAP1.

[0187] Figure 36 is a plan view of a display panel according to some embodiments of the present disclosure. Figure 37 is along Figure 36 the cross-sectional view taken along line G-G' in Figure 36 and Figure 37 The display panel depicted in Figure 34 and Figure 35 differs from the display panel depicted in

[0188] In some embodiments, the display panel further includes quantum dot materials at least partially within third openings among the plurality of third openings AP3 on the first side S1 or the second side S2 of the display area DA, and there is no quantum dot material within the third openings on the third side S3 or the fourth side S4 of the display area DA. The first side S1 is opposite to the second side S2, and the third side S3 is opposite to the fourth side S4. The third side S3 connects the first side S1 and the second side S2. The fourth side S4 connects the first side S1 and the second side S2. Optionally, the display panel further includes quantum dot materials at least partially within the third openings on the first side S1 or the second side S2 of the display area DA, and there is no quantum dot material within the third openings on the third side S3 or the fourth side S4 of the display area DA.

[0189] In some embodiments, along the direction from the first side S1 to the second side S2 or from the second side S2 to the first side S1, a color conversion layer and quantum dot materials are printed within the third openings on the first side S1 or the second side S2 of the display area DA.

[0190] Figure 38 is a plan view of a display panel according to some embodiments of the present disclosure. Figure 39 is along Figure 36 the cross-sectional view taken along the line H-H’ in Figure 38 Refer to Figure 39 , in some embodiments, the display panel includes a display area DA and a non-display area NDA. In the display area DA, as described above, the display panel includes a plurality of first openings and a plurality of second openings AP2. In the non-display area NDA, in some embodiments, the display panel includes grooves GV at least partially extending into the dam layer BL (e.g., extending through the dam layer BL). The grooves GV are located in the non-display area NDA.

[0191] In some embodiments, the grooves GV substantially (e.g., at least 50%, at least 60%, at least 70%, at least 80%, at least 90%, at least 95%, at least 99% or 100%) surround the display area DA.

[0192] In some embodiments, the display panel further includes a plurality of third openings AP3 at least partially extending into the dam layer BL (e.g., extending through the dam layer BL). The plurality of third openings AP3 are located in the non-display area NDA. In some embodiments, the combination of the plurality of third openings AP3 substantially (e.g., at least 50%, at least 60%, at least 70%, at least 80%, at least 90%, at least 95%, at least 99% or 100%) surrounds the display area DA.

[0193] In some embodiments, the groove GV substantially (e.g., at least 50%, at least 60%, at least 70%, at least 80%, at least 90%, at least 95%, at least 99% or 100%) surrounds the plurality of third openings AP3.

[0194] In some embodiments, the display panel further includes quantum dot material at least partially within the groove GV. Optionally, the quantum dot material at least partially within the groove GV is the same as the color conversion material used to form the color conversion layer.

[0195] In some embodiments, the quantum dot material at least partially within the groove GV is in direct contact with the first capping layer CAP1.

[0196] In some embodiments, the groove GV is configured to prevent the overflow of encapsulation material (e.g., organic encapsulation material) during the manufacture of the display panel. In some embodiments, a portion of the second encapsulation layer EN2 (e.g., at least a portion of the organic encapsulation sublayer of the second encapsulation layer EN2) is at least partially located within the groove GV. In some embodiments, the portion of the second encapsulation layer EN2 that is at least partially within the groove GV (e.g., the portion of the organic encapsulation sublayer of the second encapsulation layer EN2) is in direct contact with the first capping layer CAP1. Optionally, the portion of the second encapsulation layer EN2 that is at least partially within the groove GV (e.g., the portion of the organic encapsulation sublayer of the second encapsulation layer EN2) is in direct contact with the quantum dot material that is at least partially within the groove GV.

[0197] In some embodiments, there is substantially (e.g., at least 50%, at least 60%, at least 70%, at least 80%, at least 90%, at least 95%, at least 99% or 100%) no at least the organic encapsulation sublayer (e.g., the entirety of the second encapsulation layer EN2) of the second encapsulation layer EN2 within the plurality of third openings AP3. In some embodiments, the first capping layer CAP1 spaces the second encapsulation layer EN2 apart from the plurality of third openings AP3. The first capping layer CAP1 forms the top surface of the plurality of third openings AP3.

[0198] In some embodiments, the display panel further includes quantum dot material at least partially within a respective third opening of the plurality of third openings AP3. Optionally, the quantum dot material at least partially within the respective third opening is the same as the color conversion material used to form the color conversion layer. By having the quantum dot material at least partially within the respective third openings of the plurality of third openings AP3, consistency in the printing process of the color conversion layer can be achieved.

[0199] In some embodiments, the quantum dot material at least partially within the respective third opening is in direct contact with the first capping layer CAP1.

[0200] In some embodiments, the surface of the quantum dot material in the corresponding third opening that is in direct contact with the first capping layer CAP1 has a first height h1 relative to the surface of the first substrate BS, and the surface of the quantum dot material in the groove GV that is in direct contact with the second encapsulation layer EN2 has a second height h2 relative to the surface of the first substrate BS. Optionally, the first height h1 is greater than the second height h2.

[0201] In another aspect, the present disclosure provides a display panel that includes a color conversion substrate described herein or manufactured by the methods described herein, and a light-emitting substrate.

[0202] In another aspect, the present disclosure provides a display device that includes a display panel described herein or manufactured by the methods described herein, and one or more integrated circuits connected to the display panel. Examples of suitable display devices include, but are not limited to, electronic paper, mobile phones, tablet computers, televisions, monitors, laptop computers, digital photo albums, GPS, etc.

[0203] In another aspect, the present disclosure provides a method of manufacturing a display panel. In some embodiments, the method includes forming a plurality of light-emitting elements; forming a first encapsulation layer on the plurality of light-emitting elements; forming a color conversion layer including a plurality of color conversion blocks on a side of the first encapsulation layer away from the plurality of light-emitting elements; forming a color filter film on a side of the color conversion layer away from the first encapsulation layer; and forming a second encapsulation layer on a side of the color filter film away from the color conversion layer. Optionally, the second encapsulation layer includes at least an organic encapsulation sublayer.

[0204] The foregoing description of the embodiments of the present invention has been presented for purposes of illustration and description. It is not exhaustive and is not intended to limit the invention to the precise forms or exemplary embodiments disclosed. Thus, the foregoing description should be considered illustrative rather than restrictive. Obviously, many modifications and variations will be apparent to those skilled in the art. The embodiments were chosen and described in order to explain the principles of the invention and its best mode of practical application, so as to enable those skilled in the art to understand the various embodiments of the invention and the various modifications suitable for the particular use or implementation contemplated. The scope of the invention is intended to be defined by the appended claims and their equivalents, where all terms are meant in their broadest reasonable sense unless otherwise stated. Thus, terms such as "the invention", "the present invention", etc. do not necessarily limit the scope of the claims to a particular embodiment, and the reference to exemplary embodiments of the invention does not imply a limitation of the invention and should not be inferred as such. The invention is defined only by the spirit and scope of the appended claims. Additionally, these claims may refer to the use of "first", "second", etc., followed by a noun or element. These terms should be understood as nomenclature and should not be construed as limiting the number of elements modified by these nomenclatures unless a specific number has been given. Any advantages and benefits described may not apply to all embodiments of the invention. It should be understood that those skilled in the art may make changes to the described embodiments without departing from the scope of the invention defined by the appended claims. Further, no element or component in this disclosure is intended to be dedicated to the public, whether or not the element or component is expressly recited in the appended claims.

Claims

1. A display panel, comprising: a plurality of light-emitting elements; a first encapsulation layer located on the plurality of light-emitting elements; a color conversion layer located on a side of the first encapsulation layer away from the plurality of light-emitting elements and including a plurality of color conversion blocks; a color filter located on a side of the color conversion layer away from the first encapsulation layer; and a second encapsulation layer located on a side of the color filter away from the color conversion layer; wherein the second encapsulation layer at least includes an organic encapsulation sub-layer.

2. The display panel according to claim 1, further comprising: a first cover layer located on a side of the color conversion layer away from the first encapsulation layer and on a side of the color filter away from the second encapsulation layer; and a second cover layer located on a side of the first encapsulation layer away from the plurality of light-emitting elements and on a side of the color conversion layer away from the first cover layer; wherein the color filter is in direct contact with the first cover layer.

3. The display panel according to claim 1, wherein, The color filter includes a first color filter layer of a first color; a second color filter layer of a second color located on the first color filter layer of the first color; and a third color filter layer of a third color located on a side of the second color filter layer of the second color away from the first color filter layer of the first color; wherein the first color, the second color, and the third color are three different colors selected from green, red, and blue.

4. The display panel according to any one of claims 1 to 3, further comprising: a dam layer; and a plurality of first openings and a plurality of second openings extending through the dam layer; wherein the plurality of first openings and the plurality of second openings are located in a display area of the display panel; the plurality of first openings are configured to accommodate the plurality of color conversion blocks; and the plurality of color conversion blocks are not present in the plurality of second openings.

5. The display panel according to claim 4, wherein, A part of the color filter is at least partially in the corresponding second opening of the plurality of second openings.

6. In a part of a non-light-transmitting area including the corresponding second opening of the plurality of second openings, the display panel includes a stacked structure, and the stacked structure includes at least two of the following: a part of a first color filter layer of a first color; a part of a second color filter layer of a second color located on the part of the first color filter layer of the first color; or a part of a third color filter layer of a third color located on a side of the part of the second color filter layer of the second color away from the part of the first color filter layer of the first color.

7. The display panel according to claim 5, wherein, The corresponding second opening is configured to accommodate a part of a first color filter layer of a first color.

8. The display panel according to claim 7, wherein, Along a plane intersecting two adjacent color filter blocks and perpendicular to the surface of the first encapsulation layer: A part of the first color filter layer of the first color in a part of a light-transmitting area including one of the plurality of first openings has a first thickness; A part of the first color filter layer of the first color in a part of a non-light-transmitting area including one of the plurality of second openings has a second thickness; The dam layer has a third thickness; The second thickness is greater than the first thickness; and The difference between the second thickness and the first thickness is substantially the same as the third thickness.

9. The display panel according to claim 5, wherein, The corresponding second opening is configured to accommodate a portion of a first color filter layer of a first color and a portion of a second color filter layer of a second color.

10. The display panel according to claim 9, wherein, Along a plane intersecting two adjacent color filter blocks and perpendicular to the surface of the first encapsulation layer: A portion of the first color filter layer of the first color in a portion of the light-transmitting region including one of the plurality of first openings has a first thickness; A portion of the first color filter layer of the first color in a portion of the light-blocking region including one of the plurality of second openings has a second thickness; A portion of the second color filter layer of the second color in a portion of the light-transmitting region including one of the plurality of first openings has a fourth thickness; A portion of the second color filter layer of the second color in a portion of the light-blocking region including one of the plurality of second openings has a fifth thickness; The dam layer has a third thickness; The second thickness is greater than the first thickness; The fifth thickness is greater than the fourth thickness; The difference between the second thickness and the first thickness is substantially the same as the third thickness; and The difference between the fifth thickness and the fourth thickness is substantially the same as the third thickness.

11. The display panel according to claim 9, further comprising a first cover layer, the first cover layer being located on a side of the color conversion layer away from the first encapsulation layer and on a side of the color filter away from the second encapsulation layer; Among them, The portion of the first color filter layer of the first color within the corresponding second opening is in direct contact with the portion of the first cover layer within the corresponding second opening.

12. The display panel according to claim 9, further comprising a first cover layer, the first cover layer being located on a side of the color conversion layer away from the first encapsulation layer and on a side of the color filter away from the second encapsulation layer; Among them, The portion of the first color filter layer of the first color within the corresponding second opening is in direct contact with the portion of the first cover layer within the corresponding second opening; and The portion of the second color filter layer of the second color within the corresponding second opening is in direct contact with the portion of the first cover layer within the corresponding second opening.

13. The display panel according to claim 5, wherein, The corresponding second opening is configured to accommodate a portion of a first color filter layer of a first color, a portion of a second color filter layer of a second color, and a portion of a third color filter of a third color.

14. The display panel according to claim 4, further comprising a black matrix; Among them, The corresponding second opening is configured to accommodate a portion of the black matrix.

15. The display panel according to any one of claims 1 to 14, further comprising: A dam layer; and A groove extending at least partially into the dam layer; wherein the groove is located in a non-display area of the display panel; and The groove substantially surrounds the display area of the display panel.

16. The display panel according to claim 15, wherein, A portion of the second encapsulation layer is at least partially within the groove.

17. The display panel according to claim 15 further includes a plurality of third openings at least partially extending into the dam layer; Among them, The plurality of third openings are located in the non-display area; The combination of the plurality of third openings substantially surrounds the display area; And The groove substantially surrounds the combination of the plurality of third openings.

18. The display panel according to claim 17, wherein, A part of the second encapsulation layer is at least partially within a corresponding one of the plurality of third openings.

19. The display panel according to claim 17 includes quantum dot materials at least partially within a corresponding one of the plurality of third openings.

20. The display panel according to claim 17 includes quantum dot materials at least partially within a third opening on the first side or the second side of the display area among the plurality of third openings; Among them, There is no quantum dot material in the third openings on the third side or the fourth side of the display area among the plurality of third openings; The first side is opposite to the second side; and The third side is opposite to the fourth side.

21. The display panel according to claim 17 further includes: A first cover layer located on a side of the color conversion layer away from the first encapsulation layer and on a side of the color filter away from the second encapsulation layer; Wherein, the quantum dot materials are at least partially within the groove; A part of the second encapsulation layer is at least partially within the groove; and Quantum dot materials are at least partially within a corresponding one of the plurality of third openings; Wherein, a surface of the quantum dot material in the corresponding third opening in direct contact with the first cover layer has a first height relative to the surface of the first substrate; A surface of the quantum dot material in the groove in direct contact with the part of the second encapsulation layer within the groove has a second height relative to the surface of the first substrate; and The first height is greater than the second height.

22. A display device includes the display panel according to any one of claims 1 to 21 and one or more integrated circuits connected to the display panel.

Images