Color conversion substrate and display device

Abstract

A color conversion substrate is provided. The color conversion substrate includes: a substrate; the pattern layer is positioned on the substrate; the dam layer is located on the side, away from the substrate, of the pattern layer; a color conversion layer at least partially located in a plurality of first openings respectively extending through the bank layer; and a light transmissive layer at least partially located in the plurality of second openings respectively extending through the bank layer. The pattern layer comprises a plurality of pattern blocks. Each of the plurality of pattern blocks protrudes away from the substrate toward the dam layer.

Description

Technical Field

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

[0002] Quantum dot materials have excellent optical and electrical properties, including narrow emission peaks (half-peak width of about 30 nm), tunable spectra (ranging from visible light to infrared light), high photochemical stability, and low onset voltage. The wavelength of light emitted from quantum dot materials is tunable based at least in part 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] On the one hand, the present disclosure provides a color conversion substrate, comprising: a base substrate; a pattern layer located on the base substrate; a dam layer located on a side of the pattern layer away from the base substrate; a color conversion layer at least partially located in a plurality of first openings respectively extending through the dam layer; and a light-transmitting layer at least partially located in a plurality of second openings respectively extending through the dam layer; wherein the pattern layer comprises a plurality of pattern blocks; and each of the plurality of pattern blocks protrudes away from the base substrate toward the dam layer.

[0004] Optionally, a surface of the dam layer close to the pattern layer has a shape conforming to a surface of the pattern layer close to the dam layer.

[0005] Optionally, the pattern layer and the dam layer are at least partially located in a non-light-transmitting area; the pattern layer and the dam layer are at least partially absent from a plurality of light-transmitting areas; and an orthographic projection of the dam layer on the base substrate at least partially overlaps with an orthographic projection of each pattern block on the base substrate.

[0006] Optionally, the orthographic projection of the surface of the dam layer on the side close to the pattern layer on the base substrate covers the orthographic projection of the multiple pattern blocks on the base substrate; and the area of ​​the orthographic projection of the surface of the dam layer on the side close to the pattern layer on the base substrate is at least 1.2 times the area of ​​the orthographic projection of the multiple pattern blocks on the base substrate.

[0007] Optionally, each of the pattern blocks is in direct contact with the dam layer.

[0008] Optionally, the color conversion substrate further comprises an intermediate layer, which is located on a side of the pattern layer away from the base substrate and on a side of the dam layer close to the base substrate; wherein each pattern block is in direct contact with the intermediate layer; and the intermediate layer is in direct contact with the dam layer.

[0009] Optionally, the intermediate layer at least partially exists in the non-light-transmitting area, and at least partially does not exist in multiple light-transmitting areas; and the orthographic projection of the intermediate layer on the base substrate at least partially does not overlap with the orthographic projection of the color conversion layer on the base substrate, and at least partially does not overlap with the orthographic projection of the light-transmitting layer on the base substrate.

[0010] Optionally, the plurality of pattern blocks include a first adjacent pattern block and a second adjacent pattern block, wherein the first adjacent pattern block and the second adjacent pattern block are located in a portion of the non-light-transmitting area, and the portion is located between a first adjacent light-transmitting area and a second adjacent light-transmitting area in the plurality of light-transmitting areas.

[0011] Optionally, a portion of the dam layer at least partially extends into a gap between the first adjacent pattern block and the second adjacent pattern block, and directly contacts the first adjacent pattern block and the second adjacent pattern block.

[0012] Optionally, the color conversion substrate further includes: an intermediate layer located on a side of the first adjacent pattern block and the second adjacent pattern block away from the base substrate, the intermediate layer at least partially extending into a gap between the first adjacent pattern block and the second adjacent pattern block, and directly contacting the first adjacent pattern block and the second adjacent pattern block; and a groove extending into a portion of the intermediate layer, the portion at least partially extending into the gap; wherein a portion of the dam layer at least partially extends into the groove and directly contacts the intermediate layer.

[0013] Optionally, each pattern block has a first side in contact with the base substrate, a second side opposite to the first side, a third side connecting the first side and the second side, and a fourth side connecting the first side and the second side, and the third side and the fourth side are opposite to each other.

[0014] Optionally, the dam layer at least partially covers the second side, the third side and the fourth side of each pattern block.

[0015] Optionally, the color conversion substrate further comprises an intermediate layer located on a side of the corresponding pattern block away from the base substrate; wherein the intermediate layer at least partially covers the second side, the third side and the fourth side of each pattern block; and the dam layer at least partially covers a side of the intermediate layer covering the second side of each pattern block, at least partially covers a side of the intermediate layer covering the third side of each pattern block, and at least partially covers a side of the intermediate layer covering the fourth side of each pattern block.

[0016] Optionally, the intermediate layer has a first refractive index; the pattern layer has a second refractive index; the base substrate has a third refractive index; the third refractive index is greater than the first refractive index; and the first refractive index is greater than the second refractive index.

[0017] Optionally, the first refractive index is in the range of 1.6 to 1.8; the second refractive index is in the range of 1.4 to 1.6; and the third refractive index is in the range of 1.80 to 1.90.

[0018] Optionally, each of the pattern blocks comprises a reflective material.

[0019] Optionally, each of the pattern blocks comprises a metal material.

[0020] Optionally, each of the pattern blocks has an average thickness; the dam layer has a third average thickness; and a ratio of the third average thickness to the average thickness is in a range of 2 to 10.

[0021] Optionally, the first adjacent pattern blocks have a first average thickness; the second adjacent pattern blocks have a second average thickness; the dam layer has a third average thickness; the ratio of the third average thickness to the first average thickness is in the range of 2 to 10; and the ratio of the third average thickness to the second average thickness is in the range of 2 to 10.

[0022] Optionally, the first adjacent pattern blocks and the second adjacent pattern blocks are separated by a minimum distance; in a cross-section along a plane perpendicular to the base substrate and intersecting the first adjacent pattern blocks and the second adjacent pattern blocks, the first adjacent pattern blocks have a first width and the second adjacent pattern blocks have a second width; and the sum of the minimum distance, the first width and the second width is less than a maximum width of a portion of a pixel defining layer in a display panel having the color conversion substrate, wherein the portion of the pixel defining layer is located between a first adjacent light-transmitting area and a second adjacent light-transmitting area among the multiple light-transmitting areas.

[0023] In another aspect, the present disclosure provides a display device, comprising the color conversion substrate described herein and a plurality of light emitting elements located between a first base substrate and the pattern layer.

[0024] Optionally, the display device also includes an encapsulation layer that encapsulates the multiple light-emitting elements; wherein the encapsulation layer includes a first inorganic encapsulation sublayer, an organic encapsulation sublayer located on a side of the first inorganic encapsulation sublayer away from the multiple light-emitting elements, and a second inorganic encapsulation sublayer located on a side of the organic encapsulation sublayer away from the multiple light-emitting elements; and the pattern layer is in direct contact with the second encapsulation sublayer.

[0025] Optionally, the display device further comprises a pixel defining layer defining a plurality of sub-pixel openings; wherein an orthographic projection of the pixel defining layer on the base substrate covers an orthographic projection of the pattern layer on the base substrate. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] According to various disclosed embodiments, the following drawings are examples only for illustration purposes and are not intended to limit the scope of the present invention.

[0027] Figure 1 is a schematic diagram showing the structure of a display panel in some embodiments of the present disclosure.

[0028] Figure 2 is along Figure 1 Cross-sectional view along line A-A'.

[0029] Figure 3 is a plan view of a display panel according to some embodiments of the present disclosure.

[0030] Figure 4 is a cross-sectional view of a display panel according to some embodiments of the present disclosure.

[0031] Figure 5 is a cross-sectional view of a display panel according to some embodiments of the present disclosure.

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

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

[0034] Figure 6C is a schematic diagram showing the structure of a light emitting element in some embodiments according to the present disclosure.

[0035] Fig. 7A is a schematic diagram showing the structure of a first color conversion block according to some embodiments of the present disclosure.

[0036] Figure 7B is a schematic diagram showing the structure of a second color conversion block according to some embodiments of the present disclosure.

[0037] Figure 7C is a schematic diagram showing the structure of a light-transmitting block in some embodiments of the present disclosure.

[0038] Figure 8 The correlation between the thickness of the color conversion layer and the quantum dot conversion rate in some embodiments according to the present disclosure is shown.

[0039] Fig. 9 is a cross-sectional view of a color conversion substrate according to some embodiments of the present disclosure.

[0040] Fig.10 is a cross-sectional view of a display panel according to some embodiments of the present disclosure.

[0041] Fig.11 is a cross-sectional view of a color conversion substrate according to some embodiments of the present disclosure.

[0042] Fig.12 is a cross-sectional view of a display panel according to some embodiments of the present disclosure.

[0043] Fig.13A is a plan view of a color conversion substrate according to some embodiments of the present disclosure.

[0044] Fig. 13B is a plan view of a color conversion substrate according to some embodiments of the present disclosure.

[0045] Fig.14 A non-light-transmissive area in some embodiments according to the present disclosure is shown.

[0046] Fig.15 is a plan view of a color conversion substrate according to some embodiments of the present disclosure.

[0047] Fig.16 is a plan view of a color conversion substrate according to some embodiments of the present disclosure.

[0048] Fig.17 is a plan view of a color conversion substrate according to some embodiments of the present disclosure.

[0049] Fig.18 is a plan view of a color conversion substrate according to some embodiments of the present disclosure.

[0050] Fig.19 is a plan view of a color conversion substrate according to some embodiments of the present disclosure.

[0051] Fig. 20 is a cross-sectional view of a pattern layer in some embodiments of the present disclosure.

[0052] Fig.21 is a cross-sectional view of a pattern layer in some embodiments of the present disclosure.

[0053] Fig. 22 is a cross-sectional view of a pattern layer in some embodiments of the present disclosure.

[0054] Fig.23 is a cross-sectional view of two adjacent pattern blocks according to some embodiments of the present disclosure.

[0055] Fig.24 is a cross-sectional view of a portion of an intermediate layer located on two adjacent pattern blocks according to some embodiments of the present disclosure.

[0056] Fig.25 is a cross-sectional view of a portion of a bank layer and a portion of an intermediate layer located on two adjacent pattern blocks according to some embodiments of the present disclosure.

[0057] Fig.26 is a cross-sectional view of a portion of a bank layer and a portion of an intermediate layer located on two adjacent pattern blocks according to some embodiments of the present disclosure.

[0058] Fig. 27 The light path in the color conversion substrate according to some embodiments of the present disclosure is shown.

[0059] Fig.28 is a cross-sectional view of a color conversion substrate according to some embodiments of the present disclosure.

[0060] Fig.29 is a cross-sectional view of a display panel according to some embodiments of the present disclosure.

[0061] Fig.30 is a cross-sectional view of a color conversion substrate according to some embodiments of the present disclosure.

[0062] Fig.31 is a plan view of a color conversion substrate according to some embodiments of the present disclosure.

[0063] Fig.32 is a plan view of a color conversion substrate according to some embodiments of the present disclosure.

[0064] Fig.33 is a plan view of a color conversion substrate according to some embodiments of the present disclosure.

[0065] Fig.34 is a plan view of a color conversion substrate according to some embodiments of the present disclosure.

[0066] Fig.35 is a cross-sectional view of a pattern layer in some embodiments of the present disclosure.

[0067] Fig.36 is a cross-sectional view of a pattern layer in some embodiments of the present disclosure.

[0068] Fig.37 is a cross-sectional view of a pattern layer in some embodiments of the present disclosure.

[0069] Fig.38 is a cross-sectional view of two adjacent pattern blocks according to some embodiments of the present disclosure.

[0070] Fig.39 is a cross-sectional view of a color conversion substrate according to some embodiments of the present disclosure.

[0071] Fig.40 is a cross-sectional view of a color conversion substrate according to some embodiments of the present disclosure.

[0072] Fig.41 is a cross-sectional view of corresponding pattern blocks in some embodiments of the present disclosure.

[0073] Fig.42 is a cross-sectional view of a portion of a dam layer located on a corresponding pattern block according to some embodiments of the present disclosure.

[0074] Fig.43 is a cross-sectional view of a portion of an intermediate layer located on a corresponding pattern block according to some embodiments of the present disclosure.

[0075] Fig.44 is a cross-sectional view of a portion of a bank layer and a portion of an intermediate layer located on a corresponding pattern block in some embodiments according to the present disclosure.

[0076] Fig.45 The light path in the color conversion substrate according to some embodiments of the present disclosure is shown.

[0077] Fig.46 is a cross-sectional view of corresponding pattern blocks in some embodiments of the present disclosure. DETAILED DESCRIPTION

[0078] The present disclosure will now be described in more detail with reference to the following examples. It should be noted that the following description of some of the embodiments presented herein is for illustration and description purposes only. It is not intended to be exhaustive or limited to the precise form disclosed.

[0079] The present disclosure provides, among other things, a color conversion substrate and a display device, which substantially eliminate one or more problems caused by the limitations and disadvantages of the prior art. On the one hand, the present disclosure provides a color conversion substrate. In some embodiments, the color conversion substrate includes: a base substrate; a pattern layer, which is located on the base substrate; a dam layer, which is located on a side of the pattern layer away from the base substrate; a color conversion layer, which is at least partially located in a plurality of first openings extending through the dam layer, respectively; and a light-transmitting layer, which is at least partially located in a plurality of second openings extending through the dam layer, respectively. Optionally, the pattern layer includes a plurality of pattern blocks. Optionally, each of the plurality of pattern blocks protrudes away from the base substrate toward the dam layer.

[0080] Figure 1 A schematic diagram showing the structure of a display panel according to some embodiments of the present disclosure. Figure 2 is along Figure 1Cross-sectional view along line A-A'. 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 spacing layer SL separating the light emitting substrate LS from the color conversion substrate CS. The display panel DP includes a display area DA and a non-display area NDA.

[0081] Figure 3 is a plan view of a display panel according to some embodiments of the present disclosure. Figure 3 In some embodiments, the display panel includes a plurality of sub-pixel regions SR and an inter-sub-pixel region ISR. As used herein, a sub-pixel region refers to a light-emitting region of a sub-pixel, for example, a region corresponding to a pixel electrode in a liquid crystal display, or a region corresponding to a light-emitting layer in a light-emitting diode display panel, or a region corresponding to a color conversion block in a display panel according to the present disclosure. Optionally, a pixel may include a plurality of separate light-emitting regions corresponding to a plurality of sub-pixels in a pixel. Optionally, the sub-pixel region is a light-emitting region of a red sub-pixel. Optionally, the sub-pixel region is a light-emitting region of a green sub-pixel. Optionally, the sub-pixel region is a light-emitting region of a blue sub-pixel. Optionally, the sub-pixel region is a light-emitting region of a white sub-pixel. As used herein, an inter-sub-pixel region refers to a region between adjacent sub-pixel regions, for example, a region corresponding to a black matrix in a liquid crystal display, or a region corresponding to a pixel defining layer in a light-emitting diode display panel, or a region corresponding to a dam layer in a display panel according to the present disclosure. Optionally, an inter-sub-pixel region is a region between adjacent sub-pixel regions in the same pixel. Optionally, an inter-sub-pixel region is a region between two adjacent sub-pixel regions in two adjacent pixels. Optionally, the inter-subpixel region is a region between a sub-pixel region of a red sub-pixel and a sub-pixel region of an adjacent green sub-pixel. Optionally, the inter-subpixel region is a region between a sub-pixel region of a red sub-pixel and a sub-pixel region of an adjacent blue sub-pixel. Optionally, the inter-subpixel region is a region between a sub-pixel region of a green sub-pixel and a sub-pixel region of an adjacent blue sub-pixel.

[0082] Various suitable embodiments can be practiced to make the display panel of the present disclosure. In one example, the light-emitting substrate and the color conversion substrate are manufactured separately, and then they are assembled together using a filling layer to form a display panel. In another example, the color conversion substrate is directly manufactured on the light-emitting substrate.

[0083] Figure 4 is a cross-sectional view of a display panel according to some embodiments of the present disclosure. Figure 4In 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 the light emitting substrate LS and the color conversion substrate CS are assembled into a display panel.

[0084] Figure 5 is a cross-sectional view of a display panel according to some embodiments of the present disclosure. Figure 5 , the display panel does not include a filling layer. The color conversion substrate CS is directly located on the light emitting substrate LS, for example, directly located on the surface of the second inorganic encapsulation sublayer ENL3 of the light emitting substrate LS.

[0085] Reference Figure 4 and Figure 5 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), which are located on the first substrate BS1; an insulating layer IN, which is 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, which are located on a side of the insulating layer IN away from the first substrate BS1; and an encapsulation layer TFE, which is 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 encapsulation layer TFE includes a first inorganic encapsulation sublayer ENL1, an organic encapsulation sublayer ENL2 located on a side of the first inorganic encapsulation sublayer ENL1 away from the first substrate BS1, and a second inorganic encapsulation sublayer ENL3 located on a side of the organic encapsulation sublayer ENL2 away from the first substrate BS1.

[0086] Reference Figure 4 and Figure 5 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 located in the plurality of openings defined by the dam layer BL, and a light-transmitting layer LTL. The color conversion layer CCL includes a plurality of color conversion blocks CCB. The light-transmitting layer LTL includes a plurality of light-transmitting blocks LTB.

[0087] In some embodiments, the color conversion substrate further includes a first capping layer CAP1 located on a side of the bank layer BL, the color conversion layer CCL, and the light-transmitting layer LTL away from the base substrate BBS.

[0088] In some embodiments, the color conversion substrate CS further includes a color filter CF located on the color conversion layer CCL and the light-transmitting layer LTL. The color filter CF includes a plurality of color filter blocks CFB. The orthographic projection of each color filter block in the plurality of color filter blocks CFB on the base substrate at least partially overlaps with the orthographic projection of the corresponding color conversion block or the corresponding light-transmitting block on the base substrate. The orthographic projections of adjacent color filter blocks may partially overlap with each other, for example, along the edge.

[0089] In some embodiments, the color conversion substrate CS further comprises a black matrix BM located on a side of the color filter CF away from the color conversion layer CCL and the light-transmitting 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-transmitting block is at least partially located in a separate subpixel region. Optionally, the color conversion substrate CS comprises a second cover layer CAP2 located on a side of the color filter CF close to the dam layer BL, the color conversion layer CCL and the light-transmitting layer LTL. Optionally, the color conversion substrate CS comprises a second cover layer CAP2 located on a side of the dam layer BL, the color conversion layer CCL and the light-transmitting layer LTL away from the color filter CF.

[0090] In some embodiments, the light-transmitting layer LTL is a light scattering layer, and the plurality of light-transmitting blocks LTB are a plurality of light scattering blocks.

[0091] 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, a 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). A plurality of light-transmitting blocks LTB do not convert the color of the incident light. Optionally, a plurality of light-transmitting blocks LTB are configured to scatter incident light (e.g., blue light), which is emitted through a color filter block for image display. A plurality of color filter blocks CFB include a color filter block of a first color corresponding to the first color conversion block (e.g., a red color filter block), a color filter block of a second color corresponding to the second color conversion block (e.g., a green color filter block), and a color filter block of a third color corresponding to the light-transmitting block (e.g., a blue color filter block).

[0092] Various suitable light emitting elements may be implemented in the display panel according to the present disclosure. Fig. 6A Schematic diagram showing the structure of a light emitting element in some embodiments of the present disclosure. Fig. 6AIn 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.

[0093] In some embodiments, the light emitting element may have a stacked structure. Figure 6B Schematic diagram showing the structure of a light emitting element in some embodiments of the present disclosure. 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.

[0094] Figure 6C Schematic diagram showing the structure of a light emitting element in some embodiments of the present disclosure. 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 second light emitting layer EML3.

[0095] Fig. 7A is a schematic diagram showing the structure of the first color conversion block according to some embodiments of the present disclosure. Fig. 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 SP1 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 resins, acrylic resins, polyurethane resins, silicone resins, and silane resins. Examples of suitable materials for preparing the plurality of first scattering particles SP1 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 material may include a material 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.

[0096] Figure 7B is a schematic diagram showing the structure of the second color conversion block according to some embodiments of the present disclosure. 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 SP2 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 resins, acrylic resins, polyurethane resins, silicone resins, and silane resins. Examples of suitable materials for preparing the plurality of second scattering particles SP2 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 material may include a material 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.

[0097] Figure 7CSchematic diagram showing the structure of a light-transmitting block in some embodiments of the present disclosure. Figure 7C In some embodiments, the light-transmitting block LTB includes a third matrix MS3 and a plurality of third scattering particles SP3 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 resins, acrylic resins, polyurethane resins, silicone resins, and silane resins. Examples of suitable materials for preparing the plurality of third scattering particles SP3 include TiO2, ZnO, ZrO2, Al2O3, and SiO2.

[0098] 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.

[0099] In one example, the first scattering particles SP1, the second scattering particles SP2, and the third scattering particles SP3 include the same scattering material. In another example, at least two of the first scattering particles SP1, the second scattering particles SP2, and the third scattering particles SP3 include different scattering materials.

[0100] Figure 8 The correlation between the thickness of the color conversion layer and the quantum dot conversion rate in some embodiments according to the present disclosure is shown. The inventors of the present disclosure have found that the quantum dot conversion rate is related to the thickness of the color conversion layer. Generally, the quantum dot conversion rate increases with the thickness of the color conversion layer. Due to the limitation of the materials used to manufacture the color conversion layer, the maximum thickness of the color conversion layer in the relevant color conversion substrate is generally only about 10 μm, which is less than the optimal thickness value for achieving the maximum quantum dot conversion rate.

[0101] The inventors of the present disclosure have found that in related color conversion substrates, the dam layer is easy to peel off due to insufficient adhesion between the dam layer and its underlying layer (usually an encapsulation layer). The inventors of the present disclosure have found that, surprisingly and unexpectedly, the fine structure of the color conversion substrate significantly improves the performance of the color conversion substrate. Through the unique structure of the color conversion substrate according to the present disclosure, the contact area between the dam layer and its underlying structure is greatly increased. The color conversion substrate also allows the deposition of a color conversion layer with a larger thickness and enhanced luminous efficiency. In addition, the color conversion substrate has a higher quantum dot conversion rate.

[0102] Fig. 9 is a cross-sectional view of a color conversion substrate according to some embodiments of the present disclosure. Fig. 9In some embodiments, the color conversion substrate includes: a pattern layer PTN located on a base substrate BBS; a dam layer BL located on a side of the pattern layer PTN away from the base substrate BBS; a plurality of first openings AP1 and a plurality of second openings AP2 extending through the dam layer BL; a color conversion layer CCL at least partially located in the plurality of first openings AP1; and a light-transmitting layer LTL at least partially located in the plurality of second openings AP2.

[0103] In some embodiments, the color conversion substrate further includes a first capping layer CAP1 located on a side of the bank layer BL, the color conversion layer CCL, and the light-transmitting layer LTL away from the base substrate BBS.

[0104] In some embodiments, the color conversion substrate further includes a color filter CF located on a side of the color conversion layer CCL and the light-transmitting layer LTL away from the base substrate BBS. In some embodiments, the color filter CF includes a plurality of color filter blocks (e.g., a color filter block CFB1 of a first color, a color filter block CFB2 of a second color, and a color filter block CFB3 of a third color). The orthographic projection of each color filter block in the plurality of color filter blocks CFB on the base substrate at least partially overlaps with the orthographic projection of the corresponding color conversion block or the corresponding light scattering block on the base substrate. The orthographic projections of adjacent color filter blocks may partially overlap with each other, for example, along an edge.

[0105] In some embodiments, the color conversion substrate 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 scattering layer LSL.

[0106] Depending on the application scenario, various appropriate layers can be implemented as a substrate BBS. Figure 4 or Figure 5 In some embodiments, the base substrate BBS may be a second capping layer CAP2. In another example, in some embodiments, the base substrate BBS may be a second inorganic encapsulation sublayer ENL3. Fig.10 is a cross-sectional view of a display panel according to some embodiments of the present disclosure. Fig.10 The pattern layer PTN is located in the second encapsulation sublayer ENL3 (equivalent to Fig. 9 In one example, the pattern layer PTN is in direct contact with the second encapsulation sublayer ENL3.

[0107] Fig.11 is a cross-sectional view of a color conversion substrate according to some embodiments of the present disclosure. Fig.11In some embodiments, the color conversion substrate includes: a pattern layer PTN located on a base substrate BBS; an intermediate layer IML located on a side of the pattern layer PTN away from the base substrate BBS; a dam layer BL located on a side of the intermediate layer IML away from the base substrate BBS; a plurality of first openings AP1 and a plurality of second openings AP2 extending through the dam layer BL; a color conversion layer CCL at least partially located in the plurality of first openings AP1; and a light-transmitting layer LTL at least partially located in the plurality of second openings AP2.

[0108] Fig.12 is a cross-sectional view of a display panel according to some embodiments of the present disclosure. Fig.12 The pattern layer PTN is located in the second encapsulation sublayer ENL3 (equivalent to Fig.11 In one example, the pattern layer PTN is in direct contact with the second encapsulation sublayer ENL3.

[0109] In a specific example, the intermediate layer IML is an additional packaging layer, such as Fig.12 as shown in .

[0110] In some embodiments, the color conversion substrate includes a plurality of sub-pixels. In some embodiments, the color conversion substrate includes a plurality of light-transmitting regions and a non-light-transmitting region. Optionally, the plurality of light-transmitting regions are Figure 4 or Figure 5 The plurality of sub-pixel regions SR shown in FIG. 1 are the same, and the non-light-transmitting region is Figure 4 or Figure 5 The inter-sub-pixel region ISR shown in is the same.

[0111] Reference Figures 9 to 12 The plurality of sub-pixels include a first sub-pixel sp1, a second sub-pixel sp2, and a third sub-pixel sp3. Figures 9 to 12 As shown, the plurality of light-transmitting regions include 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 pattern layer PTN is at least partially located in the non-light-transmitting region NTR. Optionally, the pattern layer PTN is completely located in the non-light-transmitting region NTR. The intermediate layer IML is at least partially located in the non-light-transmitting region NTR. Optionally, the intermediate layer IML is at least partially located in the non-light-transmitting region NTR, and is at least partially located in the light-transmitting region (e.g., the first light-transmitting region LTR1, the second light-transmitting region LTR2, and the third light-transmitting region LTR3).

[0112] In some embodiments, the black matrix BM is at least partially located in the non-light-transmitting region NTR. Optionally, the black matrix BM is completely located in the non-light-transmitting region NTR.

[0113] In some embodiments, the bank layer BL is at least partially located in the non-light-transmitting region NTR. Alternatively, the bank layer BL is completely located in the non-light-transmitting region NTR.

[0114] In some embodiments, each color filter block in the plurality of color filter blocks is at least partially located in a corresponding light-transmitting area in the plurality of light-transmitting areas. Optionally, at least 80% (e.g., at least 85%, at least 90%, at least 95%, at least 99% or 100%) of each color filter block is located in the corresponding light-transmitting area.

[0115] In some embodiments, each color conversion block in the plurality of color conversion blocks is at least partially located in a first single light-transmitting area among the plurality of light-transmitting areas. Optionally, at least 80% (e.g., at least 85%, at least 90%, at least 95%, at least 99%, or 100%) of each color conversion block is located in the first single light-transmitting area.

[0116] In some embodiments, each of the plurality of light-transmitting blocks is at least partially located in a second separate light-transmitting region among the plurality of light-transmitting regions. Optionally, at least 80% (e.g., at least 85%, at least 90%, at least 95%, at least 99% or 100%) of each light-transmitting block is located in the second separate light-transmitting region.

[0117] Reference Figures 9 to 12 In some embodiments, the orthographic projection of the pixel defining layer PDL on the base substrate BBS at least partially overlaps with the orthographic projection of the pattern layer PTN on the base substrate BBS. Optionally, the orthographic projection of the pixel defining layer PDL on the base substrate BBS covers the orthographic projection of the pattern layer PTN on the base substrate BBS.

[0118] In some embodiments, the orthographic projection of the bank layer BL on the base substrate BBS at least partially overlaps with the orthographic projection of the pattern layer PTN on the base substrate BBS. Optionally, the orthographic projection of the bank layer BL on the base substrate BBS covers the orthographic projection of the pattern layer PTN on the base substrate BBS.

[0119] In some embodiments, the orthographic projection of the black matrix BM on the base substrate BBS at least partially overlaps with the orthographic projection of the pattern layer PTN on the base substrate BBS. Optionally, the orthographic projection of the black matrix BM on the base substrate BBS covers the orthographic projection of the pattern layer PTN on the base substrate BBS.

[0120] Fig.13A is a plan view of a color conversion substrate according to some embodiments of the present disclosure. Figures 9 to 13A In some embodiments, the pattern layer PTN includes a plurality of pattern blocks PTB. Each of the plurality of pattern blocks PTB protrudes away from the base substrate BBS, for example, protrudes toward the dam layer BL. Fig. 9and Fig.10 In some embodiments, each pattern block is in direct contact with the bank layer BL. Fig.11 and Fig.12 In some embodiments, each pattern block is in direct contact with the intermediate layer IML, and the intermediate layer IML is in direct contact with the bank layer BL.

[0121] Fig.14 1 shows a non-light-transmitting area according to some embodiments of the present disclosure. Fig.14 In some embodiments, the non-light-transmitting region NTR includes a plurality of row portions RP and a plurality of column portions CP. The plurality of row portions RP and the plurality of column portions CP intersect with each other to form a plurality of intersection portions isp. The non-light-transmitting region NTR includes a plurality of first portions p1. Each of the plurality of first portions p1 of the non-light-transmitting region NTR is a portion located between two adjacent light-transmitting regions in the plurality of light-transmitting regions arranged along the first direction DR1. The non-light-transmitting region NTR includes a plurality of second portions p2, each of the plurality of second portions p2 of the non-light-transmitting region NTR is a portion located between two adjacent light-transmitting regions in the plurality of light-transmitting regions arranged along the second direction DR2.

[0122] The plurality of pattern blocks PTB may be arranged in various suitable manners. Fig.13A and Fig.14 In some embodiments, the plurality of pattern blocks PTB are at least partially located in the plurality of column portions CP. In some embodiments, the plurality of pattern blocks PTB are at least partially absent from the plurality of row portions RP. Optionally, the plurality of pattern blocks PTB are absent from the plurality of row portions RP except for the plurality of cross portions isp.

[0123] In some embodiments, the plurality of pattern blocks PTB are at least partially located in the plurality of first portions p1 of the non-light-transmitting region NTR. Optionally, the plurality of pattern blocks PTB are at least partially located in the plurality of first portions p1 of the non-light-transmitting region NTR, and at least partially located in the plurality of intersection portions isp of the non-light-transmitting region NTR. Optionally, the plurality of pattern blocks PTB are at least partially absent from the plurality of second portions p2. Optionally, the plurality of pattern blocks PTB are completely absent from the plurality of second portions p2.

[0124] In some embodiments, the plurality of pattern blocks PTB include a plurality of first arrays, each of the plurality of first arrays being located in a corresponding column portion of the plurality of column portions CP. In some embodiments, the pattern blocks in each first array are arranged in multiple rows and multiple columns. Optionally, each column of pattern blocks is arranged along the second direction DR2, and each row of pattern blocks is arranged along the first direction DR1. Optionally, each first array includes two columns of pattern blocks.

[0125] In some embodiments, the pattern blocks in the corresponding first array in each column portion have mirror symmetry relative to a plane perpendicular to the substrate and parallel to the second direction DR2. In some embodiments, the columns of pattern blocks in the corresponding first array in each column portion have translational symmetry along the first direction DR1.

[0126] Fig. 13B is a plan view of a color conversion substrate according to some embodiments of the present disclosure. Fig. 13B and Fig.14 In some embodiments, the plurality of pattern blocks PTB are at least partially located in the plurality of first portions p1. Optionally, the plurality of pattern blocks PTB are at least partially absent from the plurality of second portions p2. Optionally, the plurality of pattern blocks PTB are at least partially absent from the plurality of intersection portions isp. Fig. 13B As shown, the plurality of pattern blocks PTB do not exist in the plurality of second portions p2, and do not exist in the plurality of intersection portions isp.

[0127] Fig.15 is a plan view of a color conversion substrate according to some embodiments of the present disclosure. Fig.15 and Fig.14 In some embodiments, the plurality of pattern blocks PTB are at least partially located in the plurality of row portions RP. In some embodiments, the plurality of pattern blocks PTB are at least partially absent from the plurality of column portions CP. Optionally, the plurality of pattern blocks PTB are absent from the plurality of column portions CP except for the plurality of cross portions isp.

[0128] In some embodiments, the plurality of pattern blocks PTB are at least partially located in the plurality of second portions p2 of the non-light-transmitting region NTR. Optionally, the plurality of pattern blocks PTB are at least partially located in the plurality of second portions p2 of the non-light-transmitting region NTR, and at least partially located in the plurality of intersection portions isp of the non-light-transmitting region NTR. Optionally, the plurality of pattern blocks PTB are at least partially absent from the plurality of first portions p1. Optionally, the plurality of pattern blocks PTB are completely absent from the plurality of first portions p1.

[0129] In some embodiments, the plurality of pattern blocks PTB include a plurality of second arrays, each of the plurality of second arrays being located in a corresponding row portion of the plurality of row portions RP. In some embodiments, the pattern blocks in each second array are arranged in multiple rows and columns. Optionally, each column of pattern blocks is arranged along the second direction DR2, and each row of pattern blocks is arranged along the first direction DR1. Optionally, each second array includes two rows of pattern blocks.

[0130] In some embodiments, the pattern blocks in the corresponding second array in each row portion have mirror symmetry relative to a plane perpendicular to the substrate and parallel to the first direction DR1. In some embodiments, the rows of pattern blocks in the corresponding second array in each row portion have translational symmetry along the second direction DR2.

[0131] Fig.16 is a plan view of a color conversion substrate according to some embodiments of the present disclosure. Fig.16 and Fig.14 In some embodiments, the plurality of pattern blocks PTB are at least partially located in the plurality of column portions CP. In some embodiments, the plurality of pattern blocks PTB are at least partially absent from the plurality of row portions RP. Optionally, the plurality of pattern blocks PTB are absent from the plurality of row portions RP except for the plurality of cross portions isp.

[0132] In some embodiments, the plurality of pattern blocks PTB are at least partially located in the plurality of first portions p1 of the non-light-transmitting region NTR. Optionally, the plurality of pattern blocks PTB are at least partially located in the plurality of first portions p1 of the non-light-transmitting region NTR, and at least partially located in the plurality of intersection portions isp of the non-light-transmitting region NTR. Optionally, the plurality of pattern blocks PTB are at least partially absent from the plurality of second portions p2. Optionally, the plurality of pattern blocks PTB are completely absent from the plurality of second portions p2.

[0133] In some embodiments, the plurality of pattern blocks PTB include a plurality of first arrays, each of the plurality of first arrays being located in a corresponding column portion in a plurality of column portions CP. In some embodiments, the pattern blocks in each first array are arranged in multiple columns. Optionally, each column of pattern blocks is arranged along the second direction DR2. Optionally, each first array includes two columns of pattern blocks. In some embodiments, the pattern blocks in two adjacent columns in each first array are staggered relative to each other. Optionally, the corresponding first arrays located in each column portion do not have mirror symmetry relative to a plane perpendicular to the substrate substrate and parallel to the second direction DR2.

[0134] Fig.17 is a plan view of a color conversion substrate according to some embodiments of the present disclosure. Fig.17 and Fig.14 In some embodiments, the plurality of pattern blocks PTB are at least partially located in the plurality of row portions RP. In some embodiments, the plurality of pattern blocks PTB are at least partially absent from the plurality of column portions CP. Optionally, the plurality of pattern blocks PTB are absent from the plurality of column portions CP except for the plurality of cross portions isp.

[0135] In some embodiments, the plurality of pattern blocks PTB are at least partially located in the plurality of second portions p2 of the non-light-transmitting region NTR. Optionally, the plurality of pattern blocks PTB are at least partially located in the plurality of second portions p2 of the non-light-transmitting region NTR, and at least partially located in the plurality of intersection portions isp of the non-light-transmitting region NTR. Optionally, the plurality of pattern blocks PTB are at least partially absent from the plurality of first portions p1. Optionally, the plurality of pattern blocks PTB are completely absent from the plurality of first portions p1.

[0136] In some embodiments, the plurality of pattern blocks PTB include a plurality of second arrays, each of the plurality of second arrays being located in a corresponding row portion of the plurality of row portions RP. In some embodiments, the pattern blocks in each second array are arranged in multiple rows. Optionally, each row of pattern blocks is arranged along a first direction DR1. Optionally, each second array includes two rows of pattern blocks. In some embodiments, the pattern blocks in two adjacent rows in each second array are staggered relative to each other. Optionally, the corresponding second array located in each row portion does not have mirror symmetry relative to a plane perpendicular to the substrate substrate and parallel to the first direction DR1.

[0137] Fig.18 is a plan view of a color conversion substrate according to some embodiments of the present disclosure. Fig.18 and Fig.14 In some embodiments, the plurality of pattern blocks PTB are at least partially located in the plurality of column portions CP and at least partially located in the plurality of row portions RP. In some embodiments, the plurality of pattern blocks PTB are at least partially located in the plurality of first portions p1 of the non-light-transmitting region NTR and at least partially located in the plurality of second portions p2. Optionally, the plurality of pattern blocks PTB are at least partially located in the plurality of intersection portions isp of the non-light-transmitting region NTR.

[0138] In some embodiments, the plurality of pattern blocks PTB include a plurality of third arrays, each of the plurality of third arrays being located in a corresponding first portion of the plurality of first portions p1. In some embodiments, the pattern blocks in each third array are arranged in multiple rows and columns. Optionally, each column of pattern blocks is arranged along the second direction DR2, and each row of pattern blocks is arranged along the first direction DR1. Optionally, each third array includes two columns of pattern blocks.

[0139] In some embodiments, the pattern blocks in the corresponding third array in each column portion have mirror symmetry relative to a plane perpendicular to the substrate substrate and parallel to the second direction DR2. In some embodiments, the columns of pattern blocks in the corresponding third array in each first portion have translational symmetry along the first direction DR1.

[0140] In some embodiments, the plurality of pattern blocks PTB include a plurality of fourth arrays, each of the plurality of fourth arrays being located in a corresponding second portion of the plurality of second portions p2. In some embodiments, the pattern blocks in each fourth array are arranged in multiple rows and columns. Optionally, each column of pattern blocks is arranged along the second direction DR2, and each row of pattern blocks is arranged along the first direction DR1. Optionally, each fourth array includes two rows of pattern blocks.

[0141] In some embodiments, the pattern blocks in the corresponding fourth array in each second portion have mirror symmetry relative to a plane perpendicular to the substrate and parallel to the first direction DR1. In some embodiments, the rows of pattern blocks in the corresponding fourth array in each row portion have translational symmetry along the second direction DR2.

[0142] Fig.19 is a plan view of a color conversion substrate according to some embodiments of the present disclosure. Fig.19 and Fig.14 In some embodiments, the plurality of pattern blocks PTB are at least partially located in the plurality of column portions CP and at least partially located in the plurality of row portions RP. In some embodiments, the plurality of pattern blocks PTB are at least partially located in the plurality of first portions p1 of the non-light-transmitting region NTR and at least partially located in the plurality of second portions p2. Optionally, the plurality of pattern blocks PTB are at least partially located in the plurality of intersection portions isp of the non-light-transmitting region NTR.

[0143] In some embodiments, the plurality of pattern blocks PTB include a plurality of third arrays, each of the plurality of third arrays being located in a corresponding first portion of the plurality of first portions p1. In some embodiments, the pattern blocks in each third array are arranged in multiple columns. Optionally, each column of pattern blocks is arranged along the second direction DR2. Optionally, each third array includes two columns of pattern blocks. In some embodiments, the pattern blocks in two adjacent columns in each first array are staggered relative to each other. Optionally, the corresponding third array located in each column portion does not have mirror symmetry relative to a plane perpendicular to the substrate and parallel to the second direction DR2.

[0144] In some embodiments, the plurality of pattern blocks PTB include a plurality of fourth arrays, each of the plurality of fourth arrays being located in a corresponding second portion of the plurality of second portions p2. In some embodiments, the pattern blocks in each fourth array are arranged in multiple rows. Optionally, each row of pattern blocks is arranged along a first direction DR1. Optionally, each fourth array includes two rows of pattern blocks. In some embodiments, the pattern blocks in two adjacent rows in the corresponding fourth array are staggered relative to each other. Optionally, the corresponding fourth array located in each row portion does not have mirror symmetry relative to a plane perpendicular to the substrate and parallel to the first direction DR1.

[0145] Each pattern block can have various suitable shapes. In one example, referring to Figures 9 to 12 , each pattern block has a rectangular shape in a cross section along a plane perpendicular to the base substrate BBS and intersecting two adjacent pattern blocks among the plurality of pattern blocks PTB. Fig. 20 is a cross-sectional view of a pattern layer in some embodiments of the present disclosure. Fig. 20 , in a cross section along a plane perpendicular to the base substrate BBS and intersecting two adjacent pattern blocks among the plurality of pattern blocks PTB, each pattern block has a trapezoidal shape.

[0146] Fig.21 is a cross-sectional view of a pattern layer in some embodiments of the present disclosure. Fig.21 , each pattern block has a triangular shape in a cross section along a plane perpendicular to the base substrate BBS and intersecting two adjacent pattern blocks among the plurality of pattern blocks PTB.

[0147] Fig. 22 is a cross-sectional view of a pattern layer in some embodiments of the present disclosure. Fig. 22 The side of each pattern block away from the base substrate BBS has a serrated surface. By providing the serrated surface, the contact area between the bank layer BL and the lower layer is increased, and the bank layer BL can be better adhered.

[0148] Examples of other suitable shapes of each pattern block include an inverted trapezoid, a square, a partial circle shape, and the like in a cross section along a plane perpendicular to the base substrate BBS and intersecting two adjacent pattern blocks of the plurality of pattern blocks PTB.

[0149] Each pattern block may have various suitable three-dimensional shapes. Examples of suitable three-dimensional shapes include a cylinder, a cone, a cube, a cuboid, a hexagonal prism, a triangular prism, a tetrahedron, and a pyramid.

[0150] In some embodiments, the plurality of pattern blocks PTB have the same form. For example, in a cross section along a plane perpendicular to the base substrate BBS and intersecting two adjacent pattern blocks among the plurality of pattern blocks PTB, the plurality of pattern blocks PTB have the same shape. Optionally, the pattern blocks in two adjacent columns have the same form. Optionally, the pattern blocks in two adjacent rows have the same form.

[0151] In some embodiments, at least two of the plurality of pattern blocks PTB have different shapes. For example, in a cross section along a plane perpendicular to the substrate BBS and intersecting two adjacent pattern blocks in the plurality of pattern blocks PTB, at least two of the plurality of pattern blocks PTB have different shapes. Optionally, the pattern blocks in two adjacent columns have different shapes. Optionally, the pattern blocks in two adjacent rows have different shapes.

[0152] Fig.23 is a cross-sectional view of two adjacent pattern blocks according to some embodiments of the present disclosure. Fig.23 , the two adjacent pattern blocks include a first adjacent pattern block PTB1 and a second adjacent pattern block PTB2. In one example, the first adjacent pattern block PTB1 and the second adjacent pattern block PTB2 are located in the same column portion. In an alternative example, the first adjacent pattern block PTB1 and the second adjacent pattern block PTB2 are located in the same row portion. In an alternative example, the first adjacent pattern block PTB1 and the second adjacent pattern block PTB2 are located in the same intersection portion. In an alternative example, the first adjacent pattern block PTB1 and the second adjacent pattern block PTB2 are located in the same first portion. In an alternative example, the first adjacent pattern block PTB1 and the second adjacent pattern block PTB2 are located in the same second portion.

[0153] In some embodiments, the first adjacent pattern block PTB1 and the second adjacent pattern block PTB2 are separated by a minimum distance d. In some embodiments, the first adjacent pattern block PTB1 has a first average thickness t1. In some embodiments, the second adjacent pattern block PTB2 has a second average thickness t2. In some embodiments, in a cross section along a plane perpendicular to the substrate BBS and intersecting the first adjacent pattern block PTB1 and the second adjacent pattern block PTB2, the first adjacent pattern block PTB1 has a first width w1 and the second adjacent pattern block PTB2 has a second width w2. In some embodiments, in a cross section along a plane perpendicular to the substrate BBS and intersecting the first adjacent pattern block PTB1 and the second adjacent pattern block PTB2, a portion of the pixel defining layer PDL located between the first adjacent light-transmitting region ALTR1 and the second adjacent light-transmitting region ALTR2 of the plurality of light-transmitting regions has a maximum width w3.

[0154] In one example, w1 and w2 are substantially the same. In an alternative example, w1 and w2 are different from each other.

[0155] In one example, 1 μm≤w1≤10 μm, 1 μm≤w2≤10 μm, and 1 μm≤d≤10 μm.

[0156] In one example, t1 and t2 are substantially the same. In an alternative example, t1 and t2 are different from each other.

[0157] In one example, 1 μm≤t1≤5 μm, and 1 μm≤t2≤5 μm.

[0158] In some embodiments, the sum of w1, w2, and d is less than w3.

[0159] In some embodiments, the dam layer has an average thickness t3. In some embodiments, 2≤t3 / t1≤10, for example, 2≤t3 / t1≤3, 3≤t3 / t1≤4, 4≤t3 / t1≤5, 5≤t3 / t1≤6, 6≤t3 / t1≤7, 7≤t3 / t1≤8, 8≤t3 / t1≤9, or 9≤t3 / t1≤10. In some embodiments, 2≤t3 / t2≤10, for example, 2≤t3 / t2≤3, 3≤t3 / t2≤4, 4≤t3 / t2≤5, 5≤t3 / t2≤6, 6≤t3 / t2≤7, 7≤t3 / t2≤8, 8≤t3 / t2≤9, or 9≤t3 / t2≤10.

[0160] In some embodiments, reference Figures 9 to 12 and Fig.23 , in a cross section along a plane perpendicular to the base substrate BBS and intersecting the plurality of pattern blocks PTB, the pattern block closest to the corresponding light-transmitting block among the plurality of light-transmitting blocks LTB has a first average thickness t1, and the pattern block closest to the corresponding color conversion block among the plurality of color conversion blocks (e.g., the first color conversion block CCB1 or the second color conversion block CCB2) has a second average thickness t2. Optionally, t1 and t2 are different from each other. In one example, t1>t2. In an alternative example, t2>t1.

[0161] Various suitable materials and manufacturing methods can be used to form multiple pattern blocks PTB. Examples of suitable materials for making multiple pattern blocks PTB include organic insulating materials, metal materials, inorganic insulating materials, reflective materials or any combination thereof. Examples of organic insulating materials for making multiple pattern blocks PTB include methacrylate, cinnamate, polyurethane resin, silicone resin and silane resin. Examples of metal materials for making multiple pattern blocks PTB include aluminum, silver, gold and copper. Multiple pattern blocks PTB can be formed by photolithography, imprinting, nanoimprinting and sputtering.

[0162] In some embodiments, the surface of the plurality of pattern blocks PTB may be treated to increase its roughness, thereby increasing the contact area with the layer located on top of the plurality of pattern blocks PTB. In particular, when the dam layer is formed to be in direct contact with the plurality of pattern blocks PTB, the increased roughness of the surface of the plurality of pattern blocks PTB may increase the contact area between the dam layer and the plurality of pattern blocks PTB, enhancing the adhesion of the dam layer to the pattern layer PTN. For example, the surface of the plurality of pattern blocks PTB may be treated with plasma or ultraviolet ozone treatment.

[0163] In some embodiments, the refractive index of the plurality of pattern blocks PTB is in the range of 1.4 to 1.6.

[0164] The inventors of the present disclosure have found that in related color conversion substrates, the dam layer is easy to peel off due to insufficient adhesion between the dam layer and its underlying layer (usually an encapsulation layer). The inventors of the present disclosure have found that, surprisingly and unexpectedly, the fine structure of the color conversion substrate significantly improves the performance of the color conversion substrate. Through the unique structure of the color conversion substrate according to the present disclosure, the contact area between the dam layer and its underlying structure is greatly increased (for example, by the presence of a pattern layer). The color conversion substrate also allows the deposition of a color conversion layer with a larger thickness and enhanced luminous efficiency. In addition, the color conversion substrate has a higher quantum dot conversion rate.

[0165] Reference Fig.11 and Fig.12 In some embodiments, the color conversion substrate further includes an intermediate layer IML, which is located on a side of the pattern layer PTN away from the base substrate BBS and on a side of the pattern layer PTN close to the dam layer BL. Optionally, each pattern block is in direct contact with the intermediate layer IML, and the intermediate layer IML is in direct contact with the dam layer BL.

[0166] Various suitable materials can be used to manufacture the intermediate layer IML. Examples of materials suitable for manufacturing the intermediate layer IML include, but are not limited to, silicon oxide (SiOy), silicon nitride (SiNy, such as Si3N4), silicon oxynitride (SiO x N y ), aluminum oxide, barium oxide and calcium oxide.

[0167] Fig.24 is a cross-sectional view of a portion of an intermediate layer located on two adjacent pattern blocks in some embodiments according to the present disclosure. Fig.24 In some embodiments, a portion of the intermediate layer IML is at least partially located in the gap G between the first adjacent pattern block PTB1 and the second adjacent pattern block PTB2. Optionally, the color conversion substrate includes a groove GV that partially extends into a portion of the intermediate layer IML located above or in the gap G. Optionally, the groove GV at least partially extends into the gap G between the first adjacent pattern block PTB1 and the second adjacent pattern block PTB2.

[0168] In some embodiments, a portion of the bank layer BL at least partially extends into the gap G between the first adjacent pattern block PTB1 and the second adjacent pattern block PTB2. Fig. 9 In some embodiments, a portion of the bank layer BL extends into the gap G and directly contacts the first adjacent pattern block PTB1 and the second adjacent pattern block PTB2. Fig.24A portion of the bank layer BL extends into the groove GV, and the groove GV partially extends into the gap G between the first adjacent pattern block PTB1 and the second adjacent pattern block PTB2. The portion of the bank layer BL partially extends into the gap G and directly contacts the intermediate layer IML.

[0169] Fig.25 is a cross-sectional view of a portion of a dam layer and a portion of an intermediate layer located on two adjacent pattern blocks according to some embodiments of the present disclosure. Fig.24 and Fig.25 In some embodiments, the dam layer BL at least partially extends into the groove GV. By providing a plurality of pattern blocks and extending the groove GV at least partially into the gap G between the first adjacent pattern block PTB1 and the second adjacent pattern block PTB2, the contact area between the dam layer BL and the underlying layer (e.g., the intermediate layer IML) can be increased, thereby enhancing the adhesion between the dam layer BL and the underlying layer.

[0170] Fig.26 is a cross-sectional view of a portion of a dam layer and a portion of an intermediate layer located on two adjacent pattern blocks in some embodiments according to the present disclosure. Fig.26 In some embodiments, the surface of the portion of the intermediate layer IML located on the side of the first adjacent pattern block PTB1 and the second adjacent pattern block PTB2 away from the base substrate BBS may be treated (for example, using plasma or ultraviolet ozone treatment) to form a sawtooth surface. By providing the sawtooth surface, the contact area between the dam layer BL and the lower layer (for example, the intermediate layer IML) is increased, and the dam layer BL can be better adhered.

[0171] In some embodiments, the intermediate layer IML has a first refractive index, and the pattern layer PTN has a second refractive index. Optionally, the first refractive index is greater than the second refractive index. In one example, the first refractive index is in the range of 1.6 to 1.8, and the second refractive index is in the range of 1.4 to 1.6. In one example, the thickness of the intermediate layer IML is in the range of 0.5 μm to 2.0 μm.

[0172] In some embodiments, the base substrate BBS has a third refractive index, the intermediate layer IML has a first refractive index, and the pattern layer PTN has a second refractive index. Optionally, the third refractive index is greater than the first refractive index, and the first refractive index is greater than the second refractive index. In one example, the third refractive index is in the range of 1.80 to 1.90 (e.g., 1.85), the first refractive index is in the range of 1.70 to 1.75, and the second refractive index is in the range of 1.5 to 1.6.

[0173] Fig. 27 FIG. 2 shows the optical path in the color conversion substrate according to some embodiments of the present disclosure. Fig. 27 By making the first refractive index greater than the second refractive index, or making the third refractive index greater than the first refractive index, the incident light irradiated on each pattern block can be refracted toward the center of the corresponding light-transmitting region (for example, the first light-transmitting region LTR1, the second light-transmitting region LTR2, or the third light-transmitting region LTR3). For example, the incident light incident to the corresponding light-transmitting region can be converged, resulting in the excitation of the quantum dot material at a better incident angle, thereby improving the quantum dot conversion rate.

[0174] In some embodiments, the plurality of pattern blocks PTB include a reflective material, such as a metal material. The incident light irradiated on each pattern block can be reflected by the surface of each pattern block toward the center of the corresponding light-transmitting area (e.g., the first light-transmitting area LTR1, the second light-transmitting area LTR2, or the third light-transmitting area LTR3), especially for incident light with a relatively large incident angle. In addition, by making the third refractive index greater than the first refractive index, incident light with a relatively small incident angle can be refracted toward the center of the corresponding light-transmitting area. The combination of the above mechanisms causes the incident light entering the corresponding light-transmitting area to converge, resulting in the excitation of the quantum dot material at a better incident angle, thereby improving the quantum dot conversion rate.

[0175] In one example, each pattern block is made of a metal material.

[0176] In an alternative example, each pattern block includes a reflective material and an insulating material. Optionally, the reflective material is located on a side of the insulating material away from the base substrate BBS. Optionally, each pattern block includes a base and a coating portion located on a side of the base away from the base substrate BBS. The coating portion is made of a reflective material such as a metal material, and the base is made of an insulating material such as an organic insulating material. Optionally, the coating portion at least partially covers the side surface of the base.

[0177] Fig.28 is a cross-sectional view of a color conversion substrate according to some embodiments of the present disclosure. Fig.29 is a cross-sectional view of a display panel according to some embodiments of the present disclosure. Fig.28 and Fig.29 In some embodiments, the color conversion substrate includes: a pattern layer PTN located on a base substrate BBS; an intermediate layer IML located on a side of the pattern layer PTN away from the base substrate BBS; a dam layer BL located on a side of the intermediate layer IML away from the base substrate BBS; a plurality of first openings AP1 and a plurality of second openings AP2 extending through the dam layer BL; a color conversion layer CCL at least partially located in the plurality of first openings AP1; and a light-transmitting layer LTL at least partially located in the plurality of second openings AP2.

[0178] Reference Fig.11 and Fig.12In some embodiments, the intermediate layer IML extends in a plurality of light-transmitting regions (eg, the first light-transmitting region LTR1, the second light-transmitting region LTR2, or the third light-transmitting region LTR3) and the non-light-transmitting region NTR. Fig.11 and Fig.12 , the orthographic projection of the intermediate layer IML on the base substrate BBS covers the orthographic projections of the color conversion layer CCL and the light-transmitting layer LTL on the base substrate BBS.

[0179] Reference Fig.28 and Fig.29 In some embodiments, the intermediate layer IML at least partially exists in the non-transparent region NTR, and at least partially does not exist in the plurality of light-transparent regions. Optionally, the orthographic projection of the intermediate layer IML on the base substrate BBS does not at least partially overlap with the orthographic projection of the color conversion layer CCL on the base substrate BBS, and does not at least partially overlap with the orthographic projection of the light-transparent layer LTL on the base substrate BBS.

[0180] The inventors of the present disclosure have found that by making the intermediate layer IML at least partially absent from the plurality of light-transmitting regions, the color conversion layer CCL and the light-transmitting layer LTL may have increased thicknesses, thereby increasing the light emitting efficiency of the color conversion layer CCL.

[0181] Fig.30 is a cross-sectional view of a color conversion substrate according to some embodiments of the present disclosure. Fig.31 is a plan view of a color conversion substrate according to some embodiments of the present disclosure. Fig.30 , Fig.31 and Fig.14In some embodiments, a plurality of pattern blocks PTB are at least partially located in a plurality of column portions CP. In some embodiments, a plurality of pattern blocks PTB are at least partially absent from a plurality of row portions RP. Optionally, a plurality of pattern blocks PTB are absent from a plurality of row portions RP except for a plurality of intersection portions isp. In some embodiments, a plurality of pattern blocks PTB are at least partially located in a plurality of first portions p1 of a non-light-transmitting region NTR. Optionally, a plurality of pattern blocks PTB are at least partially located in a plurality of first portions p1 of a non-light-transmitting region NTR, and are at least partially located in a plurality of intersection portions isp of a non-light-transmitting region NTR. Optionally, a plurality of pattern blocks PTB are at least partially absent from a plurality of second portions p2. Optionally, a plurality of pattern blocks PTB are completely absent from a plurality of second portions p2. In some embodiments, a plurality of pattern blocks PTB include a plurality of first arrays, each of the plurality of first arrays being located in a corresponding column portion in a plurality of column portions CP. In some embodiments, the pattern blocks in each first array are arranged in multiple rows and columns. Optionally, each column of pattern blocks is arranged along a second direction DR2, and each row of pattern blocks is arranged along a first direction DR1. Optionally, each first array includes a row of pattern blocks, such as Fig.31 shown.

[0182] Fig.32 is a plan view of a color conversion substrate according to some embodiments of the present disclosure. Fig.30 , Fig.32 and Fig.14 In some embodiments, the plurality of pattern blocks PTB are at least partially located in the plurality of first portions p1. Optionally, the plurality of pattern blocks PTB are at least partially absent from the plurality of second portions p2. Optionally, the plurality of pattern blocks PTB are at least partially absent from the plurality of intersection portions isp. Fig. 13B As shown, the plurality of pattern blocks PTB do not exist in the plurality of second portions p2, and do not exist in the plurality of intersection portions isp.

[0183] Fig.33 is a plan view of a color conversion substrate according to some embodiments of the present disclosure. Fig.30 , Fig.33 and Fig.14In some embodiments, a plurality of pattern blocks PTB are at least partially located in a plurality of row portions RP. In some embodiments, a plurality of pattern blocks PTB are at least partially absent from a plurality of column portions CP. Optionally, a plurality of pattern blocks PTB are absent from a plurality of column portions CP except for a plurality of intersection portions isp. In some embodiments, a plurality of pattern blocks PTB are at least partially located in a plurality of second portions p2 of a non-light-transmitting region NTR. Optionally, a plurality of pattern blocks PTB are at least partially located in a plurality of second portions p2 of a non-light-transmitting region NTR, and at least partially located in a plurality of intersection portions isp of a non-light-transmitting region NTR. Optionally, a plurality of pattern blocks PTB are at least partially absent from a plurality of first portions p1. Optionally, a plurality of pattern blocks PTB are completely absent from a plurality of first portions p1. In some embodiments, a plurality of pattern blocks PTB include a plurality of second arrays, each of the plurality of second arrays being located in a corresponding row portion of a plurality of row portions RP. In some embodiments, the pattern blocks in each second array are arranged in multiple rows and columns. Optionally, each column of pattern blocks is arranged along a second direction DR2, and each row of pattern blocks is arranged along a first direction DR1. Optionally, each second array comprises a row of pattern blocks.

[0184] Fig.34 is a plan view of a color conversion substrate according to some embodiments of the present disclosure. Fig.30 , Fig.34 and Fig.14 In some embodiments, a plurality of pattern blocks PTB are at least partially located in a plurality of column portions CP and at least partially located in a plurality of row portions RP. In some embodiments, a plurality of pattern blocks PTB are at least partially located in a plurality of first portions p1 of a non-light-transmitting region NTR and at least partially located in a plurality of second portions p2. Optionally, a plurality of pattern blocks PTB are at least partially located in a plurality of intersection portions isp of a non-light-transmitting region NTR. In some embodiments, a plurality of pattern blocks PTB include a plurality of third arrays, each of the plurality of third arrays being located in a corresponding first portion of the plurality of first portions p1. In some embodiments, the pattern blocks in each of the third arrays are arranged in multiple rows and columns. Optionally, each column of pattern blocks is arranged along the second direction DR2, and each row of pattern blocks is arranged along the first direction DR1. Optionally, each third array includes a column of pattern blocks. In some embodiments, a plurality of pattern blocks PTB include a plurality of fourth arrays, each of the plurality of fourth arrays being located in a corresponding second portion of the plurality of second portions p2. In some embodiments, the pattern blocks in each of the fourth arrays are arranged in multiple rows and columns. Optionally, each column of pattern blocks is arranged along the second direction DR2, and each row of pattern blocks is arranged along the first direction DR1. Optionally, each fourth array includes a row of pattern blocks.

[0185] Each pattern block may have various suitable shapes. Fig.35 is a cross-sectional view of a pattern layer in some embodiments of the present disclosure. Fig.35 , each pattern block has a rectangular shape in a cross section along a plane perpendicular to the base substrate BBS and intersecting two adjacent pattern blocks among the plurality of pattern blocks PTB.

[0186] Fig.36 is a cross-sectional view of a pattern layer in some embodiments of the present disclosure. Fig.36 , each pattern block has a triangular shape in a cross section along a plane perpendicular to the base substrate BBS and intersecting two adjacent pattern blocks among the plurality of pattern blocks PTB.

[0187] Fig.37 is a cross-sectional view of a pattern layer in some embodiments of the present disclosure. Fig.37 , in a cross section along a plane perpendicular to the base substrate BBS and intersecting two adjacent pattern blocks among the plurality of pattern blocks PTB, each pattern block has a trapezoidal shape.

[0188] Fig.38 is a cross-sectional view of a pattern layer in some embodiments of the present disclosure. Fig.38 The side of each pattern block away from the base substrate BBS has a serrated surface. By providing the serrated surface, the contact area between the bank layer BL and the lower layer is increased, and the bank layer BL can be better adhered.

[0189] Fig.39 is a cross-sectional view of a color conversion substrate according to some embodiments of the present disclosure. Fig.40 is a cross-sectional view of a color conversion substrate according to some embodiments of the present disclosure. Fig.39 and Fig.40 In some embodiments, the color conversion substrate includes: a pattern layer PTN located on a base substrate BBS; an intermediate layer IML located on a side of the pattern layer PTN away from the base substrate BBS; a dam layer BL located on a side of the intermediate layer IML away from the base substrate BBS; a plurality of first openings AP1 and a plurality of second openings AP2 extending through the dam layer BL; a color conversion layer CCL at least partially located in the plurality of first openings AP1; and a light-transmitting layer LTL at least partially located in the plurality of second openings AP2.

[0190] Reference Fig.39In some embodiments, the intermediate layer IML extends in a plurality of light-transmitting regions (e.g., the first light-transmitting region LTR1, the second light-transmitting region LTR2, or the third light-transmitting region LTR3) and the non-light-transmitting region NTR. In some embodiments, the orthographic projection of the intermediate layer IML on the base substrate BBS covers the orthographic projection of the color conversion layer CCL and the light-transmitting layer LTL on the base substrate BBS.

[0191] Reference Fig.40 In some embodiments, the intermediate layer IML at least partially exists in the non-transparent region NTR, and at least partially does not exist in the plurality of light-transparent regions. Optionally, the orthographic projection of the intermediate layer IML on the base substrate BBS does not at least partially overlap with the orthographic projection of the color conversion layer CCL on the base substrate BBS, and does not at least partially overlap with the orthographic projection of the light-transparent layer LTL on the base substrate BBS.

[0192] Fig.41 is a cross-sectional view of a corresponding pattern block in some embodiments of the present disclosure. Fig.41 In a cross section along a plane perpendicular to the base substrate BBS and intersecting two adjacent pattern blocks among the plurality of pattern blocks PTB, each pattern block has a first side S1 in contact with the base substrate BBS, a second side S2 opposite to the first side S1, a third side S3 connecting the first side S1 and the second side S2, and a fourth side S4 connecting the first side S1 and the second side S2, and the third side S3 and the fourth side S4 are opposite to each other.

[0193] Fig.42 is a cross-sectional view of a portion of a dam layer located on a corresponding pattern block in some embodiments according to the present disclosure. Fig.42 In some embodiments, the bank layer BL at least partially covers the second side S2 , the third side S3 , and the fourth side S4 of the corresponding pattern block.

[0194] Reference Fig.42 In some embodiments, the corresponding pattern block protrudes into the concave portion in the dam layer BL. By making the corresponding pattern block protrude into the concave portion in the dam layer BL, the contact area between the dam layer BL and the underlying layer (e.g., the corresponding pattern block) can be increased, thereby enhancing the adhesion between the dam layer BL and the underlying layer.

[0195] Fig.43 is a cross-sectional view of a portion of an intermediate layer located on a corresponding pattern block according to some embodiments of the present disclosure. Fig.41 and Fig.43 In some embodiments, the intermediate layer IML at least partially covers the second side S2, the third side S3 and the fourth side S4 of the corresponding pattern block.

[0196] Fig.44is a cross-sectional view of a portion of a dam layer and a portion of an intermediate layer located on a corresponding pattern block in some embodiments of the present disclosure. Fig.41 , Fig.43 and Fig.44 In some embodiments, the dam layer BL at least partially covers a side of a portion of the intermediate layer IML covering the second side S2 of the corresponding pattern block, at least partially covers a side of a portion of the intermediate layer IML covering the third side S3 of the corresponding pattern block, and at least partially covers a side of a portion of the intermediate layer IML covering the fourth side S4 of the corresponding pattern block.

[0197] Reference Fig.44 In some embodiments, the corresponding pattern blocks and portions of the intermediate layer IML protrude into the recesses in the dam layer BL. By making the corresponding pattern blocks and portions of the intermediate layer IML protrude into the recesses in the dam layer BL, the contact area between the dam layer BL and the underlying layer (e.g., the intermediate layer IML) may be increased, thereby enhancing adhesion between the dam layer BL and the underlying layer.

[0198] In some embodiments, the intermediate layer IML has a first refractive index, and the pattern layer PTN has a second refractive index. Optionally, the first refractive index is greater than the second refractive index. In one example, the first refractive index is in the range of 1.6 to 1.8, and the second refractive index is in the range of 1.4 to 1.6. In one example, the thickness of the intermediate layer IML is in the range of 0.5 μm to 2.0 μm.

[0199] In some embodiments, the base substrate BBS has a third refractive index, the intermediate layer IML has a first refractive index, and the pattern layer PTN has a second refractive index. Optionally, the third refractive index is greater than the first refractive index, and the first refractive index is greater than the second refractive index. In one example, the third refractive index is in the range of 1.80 to 1.90 (e.g., 1.85), the first refractive index is in the range of 1.70 to 1.75, and the second refractive index is in the range of 1.5 to 1.6.

[0200] Fig.45 FIG. 2 shows the optical path in the color conversion substrate according to some embodiments of the present disclosure. Fig.45 By making the first refractive index greater than the second refractive index, or making the third refractive index greater than the first refractive index, the incident light irradiated on the corresponding pattern block can be refracted toward the center of the corresponding light-transmitting region (for example, the first light-transmitting region LTR1, the second light-transmitting region LTR2, or the third light-transmitting region LTR3). For example, the incident light incident to the corresponding light-transmitting region can be converged, resulting in the excitation of the quantum dot material at a better incident angle, thereby improving the quantum dot conversion rate.

[0201] In some embodiments, a plurality of pattern blocks PTB include a reflective material, such as a metal material. The incident light irradiated on the corresponding pattern block can be reflected by the surface of the corresponding pattern block toward the center of the corresponding light-transmitting area (e.g., the first light-transmitting area LTR1, the second light-transmitting area LTR2, or the third light-transmitting area LTR3), especially for incident light with a relatively large incident angle. In addition, by making the third refractive index greater than the first refractive index, incident light with a relatively small incident angle can be refracted toward the center of the corresponding light-transmitting area. The combination of the above mechanisms causes the incident light entering the corresponding light-transmitting area to converge, resulting in the excitation of the quantum dot material at a better incident angle, thereby improving the quantum dot conversion rate.

[0202] In one example, each pattern block is made of a metal material.

[0203] In an alternative example, each pattern block includes a reflective material and an insulating material. Optionally, the reflective material is located on a side of the insulating material away from the base substrate BBS. Optionally, each pattern block includes a base and a coating portion located on a side of the base away from the base substrate BBS. The coating portion is made of a reflective material such as a metal material, and the base is made of an insulating material such as an organic insulating material. Optionally, the coating portion at least partially covers a side surface of the base.

[0204] Fig.46 is a cross-sectional view of a corresponding pattern block in some embodiments of the present disclosure. Fig.46 , each pattern block has an average thickness t. In some embodiments, in a cross section along a plane perpendicular to the base substrate BBS and intersecting two adjacent pattern blocks among the plurality of pattern blocks PTB, each pattern block has a width w.

[0205] In one example, 1 μm ≤ w ≤ 10 μm.

[0206] In one example, 1 μm≤t≤5 μm.

[0207] In some embodiments, the dam layer has an average thickness t3. In some embodiments, 2≤t3 / t≤10, for example, 2≤t3 / t≤3, 3≤t3 / t≤4, 4≤t3 / t≤5, 5≤t3 / t≤6, 6≤t3 / t≤7, 7≤t3 / t≤8, 8≤t3 / t≤9, or 9≤t3 / t≤10.

[0208] Reference Figures 9 to 12 , Figure 25 to Figure 30 , Fig.39 , Fig.40 , Fig.42 , Fig.44 and Fig.45In some embodiments, the shape of the surface (e.g., bottom surface) of the dam layer BL on one side close to the pattern layer PTN is conformal to the surface (e.g., top surface) of the pattern layer PTN on one side close to the dam layer BL. As used herein, the term "conformal" means that the first layer (e.g., dam layer BL) follows the morphology of the surface of the second layer (e.g., pattern layer) below the first layer, for example, the morphology of the bottom surface of the first layer substantially matches the morphology of the top surface of the second layer. The term "conformal" may imply complementary matching of two surfaces, but is not limited to complementary matching. The term "conformal" is interpreted in the present disclosure to include situations where the two surfaces are not completely complementary. For example, a third layer (e.g., intermediate layer IML) is deposited on the second layer, and the first layer is deposited on the third layer. In this case, the morphology of the bottom surface of the third layer substantially matches the morphology of the top surface of the second layer, and the morphology of the bottom surface of the first layer substantially matches the morphology of the top surface of the third layer. As long as the first layer substantially follows the morphology of the top surface of the second layer, the first layer is considered to be conformal to the second layer. In one example, the topography of the second layer includes a gap between two protruding structures, and the topography of the third layer includes a groove at a corresponding position, and when the first layer fills the groove and contacts the top surface of the third layer, the first layer is considered to be conformal to the second layer. Similarly, this explanation applies to the case where (one or more) additional layers are included between the first layer and the second layer.

[0209] Reference Fig. 9 , Fig.10 , Fig.30 and Fig.42 In some embodiments, the dam layer BL is in direct contact with the pattern layer PTN. The shape of at least a portion of the bottom surface of the dam layer BL is complementary to the shape of at least a portion of the top surface of the pattern layer PTN. The shape of the surface (e.g., bottom surface) of the dam layer BL close to the pattern layer PTN is conformal to the surface (e.g., top surface) of the pattern layer PTN close to the dam layer BL.

[0210] Reference Fig.11 , Fig.12 , Figure 25 to Figure 29 , Fig.39 , Fig.40 , Fig.44 and Fig.45 The shape of the bottom surface of the dam layer BL is not completely complementary to the shape of the top surface of the pattern layer PTN, but substantially follows the topography of the top surface of the pattern layer PTN. The bottom surface of the dam layer BL is considered to have a shape conformal to the top surface of the pattern layer PTN.

[0211] Reference Figures 9 to 12 , Figures 25 to 30 , Fig.39 , Fig.40 , Fig.42, Fig.44 and Fig.45 In some embodiments, the orthographic projection of the surface (e.g., bottom surface) of the dam layer BL on the side close to the pattern layer PTN on the base substrate BS at least partially overlaps with the orthographic projection of the plurality of pattern blocks PTB on the base substrate BS. Optionally, the orthographic projection of the surface of the dam layer BL on the side close to the pattern layer PTN on the base substrate BS covers the orthographic projection of the plurality of pattern blocks PTB on the base substrate BS. Optionally, the orthographic projection area of ​​the surface of the dam layer BL on the side close to the pattern layer PTN on the base substrate BS is larger than the orthographic projection area of ​​the plurality of pattern blocks PTB on the base substrate BS. Optionally, the area of ​​the orthographic projection of the surface of the dam layer BL on one side close to the pattern layer PTN on the base substrate BS is at least 1.2 times (for example, at least 1.3 times, at least 1.4 times, at least 1.5 times, at least 1.6 times, at least 1.7 times, at least 1.8 times, at least 1.9 times, at least 2.0 times, at least 2.1 times, at least 2.2 times, at least 2.3 times, at least 2.4 times, at least 2.5 times, at least 2.6 times) of the area of ​​the orthographic projection of the plurality of pattern blocks PTB on the base substrate BS. , at least 2.7 times, at least 2.8 times, at least 2.9 times, at least 3.0 times, at least 3.1 times, at least 3.2 times, at least 3.3 times, at least 3.4 times, at least 3.5 times, at least 3.6 times, at least 3.7 times, at least 3.8 times, at least 3.9 times, at least 4.0 times, at least 4.1 times, at least 4.2 times, at least 4.3 times, at least 4.4 times, at least 4.5 times, at least 4.6 times, at least 4.7 times, at least 4.8 times, at least 4.9 times, or at least 5.0 times).

[0212] In another aspect, the present disclosure provides a display device, comprising a color conversion substrate as described herein or manufactured by a method as described herein, and a plurality of light-emitting elements between a first substrate and a pattern layer. Examples of suitable display devices include, but are not limited to, electronic paper, mobile phones, tablet computers, televisions, monitors, notebook computers, digital photo albums, GPS, etc.

[0213] In some embodiments, the display device further comprises an encapsulation layer encapsulating a plurality of light-emitting elements. In some embodiments, the encapsulation layer comprises a first inorganic encapsulation sublayer, an organic encapsulation sublayer located on a side of the first inorganic encapsulation sublayer away from the plurality of light-emitting elements, and a second inorganic encapsulation sublayer located on a side of the organic encapsulation sublayer away from the plurality of light-emitting elements. Optionally, the pattern layer is in direct contact with the second encapsulation sublayer.

[0214] In some embodiments, the display device further comprises a pixel defining layer defining a plurality of sub-pixel openings. Optionally, an orthographic projection of the pixel defining layer on the base substrate covers an orthographic projection of the pattern layer on the base substrate.

[0215] On the other hand, the present disclosure provides a method for manufacturing a color conversion substrate. In some embodiments, the method includes: forming a pattern layer on a base substrate; forming a dam layer on a side of the pattern layer away from the base substrate; forming the color conversion layer at least partially in a plurality of first openings extending through the dam layer respectively; and forming a light-transmitting layer at least partially in a plurality of second openings extending through the dam layer respectively. Optionally, forming the pattern layer includes forming a plurality of pattern blocks. Optionally, each of the plurality of pattern blocks protrudes away from the base substrate toward the dam layer.

[0216] For the purpose of illustration and description, the above description of the embodiments of the present invention has been given. It is not exhaustive, nor is it intended to limit the present invention to the precise form or exemplary embodiments disclosed. Therefore, 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 are selected and described to explain the principles of the present invention and its best mode practical application, so that those skilled in the art can understand the various embodiments of the present invention and the various modifications suitable for the specific use or implementation under consideration. The scope of the present invention is intended to be defined by the appended claims and their equivalents, wherein all terms are meant to have the broadest reasonable meaning unless otherwise stated. Therefore, the term "the present invention" and the like do not necessarily limit the scope of the claims to a specific embodiment, and the reference to the exemplary embodiments of the present invention does not mean a limitation of the present invention, and such limitation should not be inferred. The present invention is limited only by the spirit and scope of the appended claims. In addition, these claims may involve the use of "first", "second", etc., followed by a noun or element. These terms should be understood as nomenclature, and should not be interpreted 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 present 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 present invention as defined by the appended claims. In addition, the elements and assemblies in this disclosure are not intended to be contributed to the public, regardless of whether the element or assembly is clearly described in the appended claims.

Claims

1. A color conversion substrate, include: substrate substrate; A pattern layer, which is located on the base substrate; a dam layer, which is located on a side of the pattern layer away from the base substrate; a color conversion layer at least partially located in a plurality of first openings respectively extending through the bank layer; as well as a light-transmitting layer at least partially located in a plurality of second openings respectively extending through the dam layer; Wherein, the pattern layer includes a plurality of pattern blocks; and Each of the plurality of pattern blocks protrudes away from the base substrate toward the bank layer.

2. The color conversion substrate according to claim 1, in, A surface of the bank layer on a side close to the pattern layer has a shape conforming to a surface of the pattern layer on a side close to the bank layer.

3. The color conversion substrate according to claim 1, in, The pattern layer and the dam layer are at least partially located in the non-light-transmitting area; The pattern layer and the dam layer are at least partially absent from the plurality of light-transmitting regions; as well as An orthographic projection of the dam layer on the base substrate at least partially overlaps with an orthographic projection of each pattern block on the base substrate.

4. The color conversion substrate according to claim 1, in, The orthographic projection of the surface of the dam layer on the side close to the pattern layer on the base substrate covers the orthographic projections of the plurality of pattern blocks on the base substrate; as well as An area of ​​an orthographic projection of the surface of the dam layer on a side close to the pattern layer on the base substrate is at least 1.2 times an area of ​​an orthographic projection of the plurality of pattern blocks on the base substrate.

5. The color conversion substrate according to claim 1, in, Each of the pattern blocks is in direct contact with the bank layer.

6. The color conversion substrate according to claim 1, further comprising an intermediate layer, the intermediate layer being located on a side of the pattern layer away from the base substrate and on a side of the dam layer close to the base substrate; in, Each of the pattern blocks is in direct contact with the intermediate layer; as well as The intermediate layer is in direct contact with the bank layer.

7. The color conversion substrate according to claim 4, in, The intermediate layer at least partially exists in the non-light-transmitting area, and at least partially does not exist in the plurality of light-transmitting areas; as well as The orthographic projection of the intermediate layer on the base substrate at least partially does not overlap with the orthographic projection of the color conversion layer on the base substrate, and at least partially does not overlap with the orthographic projection of the light-transmitting layer on the base substrate.

8. The color conversion substrate according to any one of claims 1 to 5, in, The plurality of pattern blocks include a first adjacent pattern block and a second adjacent pattern block, wherein the first adjacent pattern block and the second adjacent pattern block are located in a portion of the non-light-transmitting area, the portion being located between a first adjacent light-transmitting area and a second adjacent light-transmitting area among the plurality of light-transmitting areas.

9. The color conversion substrate according to claim 6, in, A portion of the dam layer at least partially extends into a gap between the first adjacent pattern block and the second adjacent pattern block and directly contacts the first adjacent pattern block and the second adjacent pattern block.

10. The color conversion substrate according to claim 6, further comprising: include: an intermediate layer, which is located on a side of the first adjacent pattern block and the second adjacent pattern block away from the base substrate, the intermediate layer at least partially extending into a gap between the first adjacent pattern block and the second adjacent pattern block, and directly contacting the first adjacent pattern block and the second adjacent pattern block; as well as a groove extending into a portion of the intermediate layer that extends at least partially into the gap; Wherein, a portion of the dam layer at least partially extends into the groove and is in direct contact with the intermediate layer.

11. The color conversion substrate according to any one of claims 1 to 5, in, Each of the pattern blocks has a first side in contact with the base substrate, a second side opposite to the first side, a third side connecting the first side and the second side, and a fourth side connecting the first side and the second side, and the third side and the fourth side are opposite to each other.

12. The color conversion substrate according to claim 9, in, The dam layer at least partially covers the second side, the third side, and the fourth side of each pattern block.

13. The color conversion substrate according to claim 9, further comprising an intermediate layer located on a side of the corresponding pattern block away from the base substrate; in, The intermediate layer at least partially covers the second side, the third side and the fourth side of each pattern block; as well as The dam layer at least partially covers a side of the intermediate layer covering the second side of each pattern block, at least partially covers a side of the intermediate layer covering the third side of each pattern block, and at least partially covers a side of the intermediate layer covering the fourth side of each pattern block.

14. The color conversion substrate according to claim 4, in, The intermediate layer has a first refractive index; The pattern layer has a second refractive index; The substrate has a third refractive index; The third refractive index is greater than the first refractive index; and The first refractive index is greater than the second refractive index.

15. The color conversion substrate according to claim 12, in, The first refractive index is in the range of 1.6 to 1.8; The second refractive index is in the range of 1.4 to 1.6; and The third refractive index is in the range of 1.80 to 1.

90.

16. The color conversion substrate according to any one of claims 1 to 13, in, Each of the pattern blocks includes a reflective material.

17. The color conversion substrate according to claim 14, in, Each of the pattern blocks comprises a metal material.

18. The color conversion substrate according to any one of claims 1 to 15, in, Each of the pattern blocks has an average thickness; The dam layer has a third average thickness; and A ratio of the third average thickness to the average thickness is in a range of 2 to 10.

19. The color conversion substrate according to any one of claims 6 to 8, in, The first adjacent pattern blocks have a first average thickness; The second adjacent pattern blocks have a second average thickness; The dam layer has a third average thickness; A ratio of the third average thickness to the first average thickness is in a range of 2 to 10; as well as A ratio of the third average thickness to the second average thickness is in a range of 2 to 10.

20. The color conversion substrate according to any one of claims 6 to 8, in, The first adjacent pattern blocks and the second adjacent pattern blocks are separated by a minimum distance; In a cross section along a plane perpendicular to the base substrate and intersecting the first adjacent pattern blocks and the second adjacent pattern blocks, the first adjacent pattern blocks have a first width, and the second adjacent pattern blocks have a second width; and The sum of the minimum distance, the first width, and the second width is smaller than the maximum width of a portion of a pixel defining layer in a display panel having the color conversion substrate, wherein the portion of the pixel defining layer is located between a first adjacent light-transmitting area and a second adjacent light-transmitting area among the plurality of light-transmitting areas.

21. A display device comprising the color conversion substrate according to any one of claims 1 to 18, and a plurality of light emitting elements located between a first base substrate and the pattern layer.

22. The display device according to claim 19, further comprising an encapsulation layer encapsulating the plurality of light emitting elements; in, The encapsulation layer includes a first inorganic encapsulation sublayer, an organic encapsulation sublayer located on a side of the first inorganic encapsulation sublayer away from the plurality of light emitting elements, and a second inorganic encapsulation sublayer located on a side of the organic encapsulation sublayer away from the plurality of light emitting elements; and The pattern layer is in direct contact with the second encapsulation sub-layer.

23. The display device according to claim 19, further comprising a pixel defining layer defining a plurality of sub-pixel openings; in, The orthographic projection of the pixel defining layer on the base substrate covers the orthographic projection of the pattern layer on the base substrate.

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