Display panel, manufacturing method therefor, and display apparatus

Abstract

A display panel, a manufacturing method therefor, and a display apparatus. The display panel comprises a first substrate (100) and a second substrate (200) that are arranged opposite to each other. The first substrate (100) comprises a first base substrate (101) and at least one dielectric filtering layer (31, 32, 33) provided on the side of the first base substrate (101) facing the second substrate (200). The dielectric filtering layer (31, 32, 33) is configured to transmit a light ray of a specific color. The second substrate (200) comprises a first color filter pattern (211), a second color filter pattern (212) and a third color filter pattern (213), the first color filter pattern (211) being configured to at least transmit a light ray of a first color, the second color filter pattern (212) being configured to at least transmit a light ray of a second color, and the third color filter pattern (213) being configured to at least transmit a light ray of a third color. The orthographic projections of the dielectric filtering layer (31, 32, 33) and at least one of the first color filter pattern (211), the second color filter pattern (212) and the third color filter pattern (213) on the first base substrate (101) overlap each other. The color of at least part of the light ray transmitted through the dielectric filtering layer (31, 32, 33) is the same as that of at least part of the light ray transmitted through the color filter pattern overlapping the dielectric filtering layer (31, 32, 33).

Description

Display panel and manufacturing method thereof, and display device Technical Field

[0001] The present disclosure relates to, but is not limited to, the field of display technology, and particularly to a display panel and a manufacturing method thereof, and a display device. Background Art

[0002] Thin Film Transistor Liquid Crystal Display (TFT-LCD), as a flat panel display device, is increasingly being used in the field of high-performance displays due to its small size, low power consumption, no radiation, and relatively low production cost.

[0003] Summary of the Invention

[0004] The following is a summary of the subject matter described in detail herein. This summary is not intended to limit the scope of the claims.

[0005] On the one hand, the present disclosure provides a display panel, including a first substrate and a second substrate arranged opposite to each other, the first substrate including a first base and a first dielectric filter layer arranged on the side of the first substrate facing the second substrate, the second substrate including a first color filter pattern, a second color filter pattern and a third color filter pattern, the first color filter pattern being configured to transmit at least a first color light, the second color filter pattern being configured to transmit at least a second color light, and the third color filter pattern being configured to transmit at least a third color light, at least one of the first color filter pattern, the second color filter pattern and the third color filter pattern overlapping with the orthographic projection of the first dielectric filter layer on the first substrate, and at least part of the light transmitted by the first dielectric filter layer having the same color as at least part of the light transmitted by the overlapping color filter pattern.

[0006] In an exemplary embodiment, the transmittance of the first dielectric filter layer to the at least part of the transmitted light is greater than or equal to 90%.

[0007] In an exemplary embodiment, the first dielectric filter layer includes a first dielectric layer and a second dielectric layer alternately arranged in sequence along the thickness direction of the first substrate, the film layer of the dielectric filter layer close to the first substrate is the first dielectric layer, and the film layer of the dielectric filter layer away from the first substrate is the second dielectric layer, and the refractive index of the first dielectric layer is less than the refractive index of the second dielectric layer.

[0008] In an exemplary embodiment, the first dielectric filter layer overlaps with the orthographic projections of the first color filter pattern and the second color filter pattern on the first substrate, and does not overlap with the orthographic projection of the third color filter pattern on the first substrate. The transmittance of the first dielectric filter layer to the first color light and the second color light is greater than or equal to 90%.

[0009] In an exemplary embodiment, the reflectivity of the first dielectric filter layer to the third color light is greater than or equal to 95%.

[0010] In an exemplary embodiment, the first dielectric filter layer is in direct contact with the first substrate.

[0011] In an exemplary embodiment, the first substrate further includes a second dielectric filter layer, which is disposed on a side of the first dielectric filter layer away from the first base, and the second dielectric filter layer overlaps with orthographic projections of the second color filter pattern and the third color filter pattern on the first base; the transmittance of the second dielectric filter layer to the second color light and the third color light is greater than or equal to 90%, and the reflectivity of the second dielectric filter layer to the first color light is greater than or equal to 95%.

[0012] In an exemplary embodiment, a flat layer is further included, and the flat layer is arranged at least on the side of the second color filter pattern close to the first substrate. The flat layer is connected to the second color filter pattern as a whole and includes the same material. The transmittance of the flat layer to the first color light, the second color light and the third color light is greater than or equal to 95%.

[0013] In an exemplary embodiment, the thickness of the first color filter pattern is greater than or equal to 0.5 micrometers and less than or equal to 1.2 micrometers; and / or the thickness of the second color filter pattern is greater than or equal to 0.5 micrometers and less than or equal to 1.2 micrometers.

[0014] In an exemplary embodiment, the first substrate further includes a third dielectric filter layer, which is disposed on a side of the second dielectric filter layer away from the first base. The third dielectric filter layer includes a third sub-dielectric filter layer and a fourth sub-dielectric filter layer. The third sub-dielectric filter layer overlaps with an orthographic projection of the first color filter pattern on the first base, and the fourth sub-dielectric filter layer overlaps with an orthographic projection of the third color filter pattern on the first base. The transmittance of the third sub-dielectric filter layer and the fourth sub-dielectric filter layer for the first color light and the third color light is both greater than or equal to 90%, and the reflectivity of the second color light is both greater than or equal to 95%.

[0015] In an exemplary embodiment, a flat layer is further included, and the flat layer is arranged at least on the side of the first color filter pattern and the third color filter pattern close to the first substrate. The flat layer is integrally connected to the first color filter pattern and the third color filter pattern and includes the same material. The transmittance of the flat layer to the first color light, the second color light, and the third color light is greater than or equal to 95%.

[0016] In an exemplary embodiment, the first substrate further includes a second dielectric filter layer, which is disposed on a side of the first dielectric filter layer away from the first base. The second dielectric filter layer includes a first sub-dielectric filter layer and a second sub-dielectric filter layer. The first sub-dielectric filter layer overlaps with an orthographic projection of the first color filter pattern on the first base, and the second sub-dielectric filter layer overlaps with an orthographic projection of the third color filter pattern on the first base. The transmittance of the first sub-dielectric filter layer and the second sub-dielectric filter layer for the first color light and the third color light is greater than or equal to 90%, and the reflectivity for the second color light is greater than or equal to 95%.

[0017] In an exemplary embodiment, a flat layer is further included. The flat layer is arranged at least on a side of the first color filter pattern close to the first substrate. The flat layer is connected to the first color filter pattern as a whole and includes the same material. The transmittance of the flat layer to the first color light, the second color light and the third color light is greater than or equal to 95%.

[0018] In an exemplary embodiment, the thickness of the second color filter pattern is greater than or equal to 0.5 micrometers and less than or equal to 1.2 micrometers; and / or the thickness of the third color filter pattern is greater than or equal to 0.5 micrometers and less than or equal to 1.2 micrometers.

[0019] In an exemplary embodiment, the first substrate further includes a third dielectric filter layer, which is disposed on a side of the second dielectric filter layer away from the first base. The third dielectric filter layer includes a third sub-dielectric filter layer and a fourth sub-dielectric filter layer. The third sub-dielectric filter layer overlaps with an orthographic projection of the second color filter pattern on the first base. The third sub-dielectric filter layer has a transmittance greater than or equal to 90% for the second color light and the third color light, and a reflectance greater than or equal to 95% for the first color light. The fourth sub-dielectric filter layer overlaps with an orthographic projection of the third color filter pattern on the first base. The fourth sub-dielectric filter layer has a transmittance greater than or equal to 90% for the second color light and the third color light, and a reflectance greater than or equal to 95% for the first color light.

[0020] In an exemplary embodiment, a flat layer is further included, and the flat layer is arranged at least on the side of the second color filter pattern and the third color filter pattern close to the first substrate. The flat layer is integrally connected to the second color filter pattern and the third color filter pattern and includes the same material. The transmittance of the flat layer to the first color light, the second color light, and the third color light is greater than or equal to 95%.

[0021] In an exemplary embodiment, the first substrate further includes a second dielectric filter layer, which is disposed on a side of the first dielectric filter layer away from the first base. The second dielectric filter layer overlaps with an orthographic projection of the third color filter pattern on the first base. The second dielectric filter layer has a transmittance of greater than or equal to 90% for the third color light and a reflectivity of greater than or equal to 95% for the first color light and the second color light.

[0022] In an exemplary embodiment, a flat layer is further included, and the flat layer is arranged at least on a side of the third color filter pattern close to the first substrate. The flat layer and the third color filter pattern are connected as a whole and include the same material. The transmittance of the flat layer to the first color light, the second color light and the third color light is greater than or equal to 95%.

[0023] In an exemplary embodiment, the thickness of the first color filter pattern is greater than or equal to 0.5 micrometers and less than or equal to 1.2 micrometers; and / or the thickness of the second color filter pattern is greater than or equal to 0.5 micrometers and less than or equal to 1.2 micrometers.

[0024] In an exemplary embodiment, the first substrate further includes a third dielectric filter layer, which is disposed on a side of the second dielectric filter layer away from the first base. The third dielectric filter layer includes a third sub-dielectric filter layer and a fourth sub-dielectric filter layer. The third sub-dielectric filter layer overlaps with an orthographic projection of the first color filter pattern on the first base. The third sub-dielectric filter layer has a transmittance greater than or equal to 90% for the first color light and the third color light, and a reflectance greater than or equal to 95% for the second color light. The fourth sub-dielectric filter layer overlaps with an orthographic projection of the second color filter pattern on the first base. The fourth sub-dielectric filter layer has a transmittance greater than or equal to 90% for the second color light and the third color light, and a reflectance greater than or equal to 95% for the first color light.

[0025] In an exemplary embodiment, a flat layer is further included. The flat layer is arranged at least on the side of the first color filter pattern and the second color filter pattern close to the first substrate. The flat layer is connected to the first color filter pattern and the second color filter pattern as a whole and includes the same material. The transmittance of the flat layer to the first color light, the second color light and the third color light is greater than or equal to 95%.

[0026] In an exemplary embodiment, the first substrate further includes a pixel driving circuit disposed on a side of the first dielectric filter layer away from the first substrate, the pixel driving circuit including at least one thin film transistor, the thin film transistor including an active layer, a gate, a first electrode, and a second electrode. The active layer is disposed on a side of the first dielectric filter layer away from the first substrate, the gate is disposed on a side of the active layer away from the first substrate, the gate overlaps with an orthographic projection of the active layer on the first substrate, the first electrode and the second electrode are disposed on a side of the gate away from the first substrate, and the first electrode and the second electrode are respectively connected to the active layer.

[0027] In an exemplary embodiment, the first substrate further includes an alignment mark disposed on the first base, the alignment mark being disposed on a side of the at least one dielectric filter layer close to the first base, and the alignment mark not overlapping with an orthographic projection of the at least one dielectric filter layer on the first base.

[0028] On the other hand, the present disclosure further provides a display device comprising any of the display panels described above.

[0029] In another aspect, the present disclosure further provides a method for preparing a display panel, comprising:

[0030] forming a first dielectric filter layer on the first substrate;

[0031] Providing a second substrate, the second substrate comprising a first color filter pattern, a second color filter pattern, and a third color filter pattern, wherein the first color filter pattern is configured to transmit at least a first color light, the second color filter pattern is configured to transmit at least a second color light, and the third color filter pattern is configured to transmit at least a third color light;

[0032] The first substrate and the second substrate are arranged in a box; wherein, at least one of the first color filter pattern, the second color filter pattern and the third color filter pattern overlaps with the orthographic projection of the first dielectric filter layer on the first substrate, and at least part of the light transmitted by the first dielectric filter layer has the same color as at least part of the light transmitted by the overlapping color filter pattern.

[0033] Still other aspects will become apparent upon reading and understanding the accompanying drawings and detailed description.

[0034] Summary of the Figures

[0035] The accompanying drawings are used to provide an understanding of the technical solution of the present application and constitute a part of the specification. Together with the embodiments of the present application, they are used to explain the technical solution of the present application and do not constitute a limitation on the technical solution of the present application.

[0036] FIG1 is a schematic cross-sectional view of a display panel according to an embodiment of the present application;

[0037] FIG2 is a schematic diagram of the planar structure of a display panel according to an embodiment of the present application;

[0038] FIG3 is a schematic cross-sectional view of a display device according to an embodiment of the present application;

[0039] FIG4 is a schematic diagram of a cross-sectional structure of a display panel according to an embodiment of the present application;

[0040] FIG5 a is a schematic diagram of a display panel manufacturing process after forming an alignment mark and a first dielectric filter layer according to an embodiment of the present application;

[0041] FIG5 b is a schematic diagram of a display panel manufacturing process after thin film transistors are formed according to an embodiment of the present application;

[0042] FIG5c is a schematic diagram of a display panel manufacturing process after forming a second dielectric filter layer according to an embodiment of the present application;

[0043] FIG5 d is a schematic diagram of a display panel manufacturing process after forming a first substrate according to an embodiment of the present application;

[0044] FIG6 is a schematic cross-sectional view of another display panel according to an embodiment of the present application;

[0045] FIG7 is a schematic cross-sectional view of another display panel according to an embodiment of the present application;

[0046] FIG8 is a schematic cross-sectional view of another display panel according to an embodiment of the present application;

[0047] FIG9 is a schematic cross-sectional view of another display panel according to an embodiment of the present application;

[0048] FIG10 is a schematic diagram of the cross-sectional structure of another display panel according to an embodiment of the present application.

[0049] Details

[0050] In order to make the purpose, technical solutions and advantages of the present disclosure clearer, the embodiments of the present disclosure will be described in detail below with reference to the accompanying drawings. Note that the embodiments can be implemented in a variety of different forms. A person of ordinary skill in the art can easily understand the fact that the methods and contents can be transformed into various forms without departing from the purpose and scope of the present disclosure. Therefore, the present disclosure should not be interpreted as being limited to the contents described in the following embodiments. In the absence of conflict, the embodiments in the present disclosure and the features in the embodiments can be arbitrarily combined with each other.

[0051] In the drawings, the sizes of various components, layer thicknesses, or regions may be exaggerated for clarity. Therefore, one embodiment of the present disclosure is not necessarily limited to these dimensions, and the shapes and sizes of the components in the drawings do not reflect true proportions. Furthermore, the drawings schematically illustrate idealized examples, and one embodiment of the present disclosure is not limited to the shapes or numerical values ​​shown in the drawings.

[0052] In this specification, ordinal numbers such as “first”, “second” and “third” are provided to avoid confusion among constituent elements, and are not intended to limit the number.

[0053] In this specification, for convenience, words and phrases indicating orientation or positional relationships, such as "middle," "upper," "lower," "front," "back," "vertical," "horizontal," "top," "bottom," "inside," and "outside," are used to illustrate the positional relationships of constituent elements with reference to the accompanying drawings. This is merely for the purpose of facilitating the description of this specification and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limiting the present disclosure. The positional relationships of constituent elements may be appropriately changed depending on the direction in which each constituent element is described. Therefore, the present disclosure is not limited to the words and phrases described in the specification and may be appropriately replaced according to the circumstances.

[0054] In this specification, unless otherwise specified or limited, the terms "mounted," "connected," and "connected" should be understood broadly. For example, they can refer to fixed connections, removable connections, or integral connections; they can refer to mechanical connections or connections; they can refer to direct connections, indirect connections through intermediaries, or internal communication between two components. Those skilled in the art will understand the specific meanings of these terms in this disclosure based on the specific circumstances.

[0055] In this specification, a transistor refers to a device that includes at least three terminals: a gate electrode, a drain electrode, and a source electrode. A transistor has a channel region between a drain electrode (drain electrode terminal, drain region, or drain electrode) and a source electrode (source electrode terminal, source region, or source electrode), and current can flow through the drain electrode, the channel region, and the source electrode. Note that in this specification, the channel region refers to the region through which current primarily flows.

[0056] In this specification, the first electrode can be a drain electrode and the second electrode can be a source electrode, or vice versa. The functions of "source electrode" and "drain electrode" may be interchanged when using transistors with opposite polarity or when the direction of current changes during circuit operation. Therefore, in this specification, "source electrode" and "drain electrode" may be interchanged.

[0057] In this specification, "connected" includes components connected together via an element having some electrical function. There are no particular limitations on the "element having some electrical function" as long as it enables the transfer of electrical signals between the connected components. Examples of "element having some electrical function" include not only electrodes and wiring, but also switching elements such as transistors, resistors, inductors, capacitors, and other components with various functions.

[0058] In this specification, "parallel" refers to a state where the angle formed by two straight lines is greater than -10° and less than 10°, and thus also includes a state where the angle is greater than -5° and less than 5°. Furthermore, "perpendicular" refers to a state where the angle formed by two straight lines is greater than 80° and less than 100°, and thus also includes a state where the angle is greater than 85° and less than 95°.

[0059] In this specification, the terms "film" and "layer" may be interchanged. For example, "conductive layer" may be replaced with "conductive film." Similarly, "insulating film" may be replaced with "insulating layer."

[0060] The term "about" in the present disclosure refers to a numerical value that is not strictly defined and allows for process and measurement errors.

[0061] The inventors of this application have discovered that in existing liquid crystal display panels, due to the relatively large thickness of the R, G, and B color films in the color film substrate, for example, the thickness of the R, G, and B color films is 2 to 3 microns, resulting in a large amount of light emitted from the light-emitting substrate being absorbed by the R, G, and B color films and lost, thereby reducing the light extraction efficiency of the light emitted from the light-emitting substrate and the transmittance of the liquid crystal display panel.

[0062] An embodiment of the present disclosure provides a display panel, including a first substrate and a second substrate arranged opposite to each other, the first substrate including a first base and a first dielectric filter layer arranged on a side of the first substrate facing the second substrate, the second substrate including a first color filter pattern, a second color filter pattern, and a third color filter pattern, the first color filter pattern being configured to transmit at least a first color light, the second color filter pattern being configured to transmit at least a second color light, and the third color filter pattern being configured to transmit at least a third color light, at least one of the first color filter pattern, the second color filter pattern, and the third color filter pattern overlapping with an orthographic projection of the first dielectric filter layer on the first substrate, and at least a portion of the light transmitted by the first dielectric filter layer having the same color as at least a portion of the light transmitted by the overlapping color filter pattern.

[0063] The solution of this embodiment is illustrated below through some examples.

[0064] Figure 1 is a schematic cross-sectional view of a display panel according to an embodiment of the present invention. As shown in Figure 1 , the display panel may include a first substrate 100 and a second substrate 200 disposed opposite each other, and a liquid crystal layer 300 disposed between the first substrate 100 and the second substrate 200. The first substrate 100 may include a first structural layer 102 disposed on the side of the first base 101 facing the second substrate 200, and the second substrate 200 may include a second structural layer 202 disposed on the side of the second base 201 facing the first substrate 100.

[0065] In an exemplary embodiment, the first structure layer 102 may include gate lines, data lines, pixel driving circuits, pixel electrodes, and common electrodes, wherein the pixel driving circuits include at least one thin film transistor; and the second structure layer 202 may include a black matrix and a color filter pattern.

[0066] In an exemplary embodiment, the first substrate 101 and the second substrate 201 may be made of an inorganic material or an organic material. In one embodiment of the present disclosure, the material of the first substrate 101 and the second substrate 201 may be a glass material such as soda-lime glass, quartz glass, sapphire glass, or may be a metal material such as stainless steel, aluminum, nickel, etc. In another embodiment of the present disclosure, the material of the first substrate 101 and the second substrate 201 may be polymethylmethacrylate (PMMA), polyvinyl alcohol (PVA), polyvinylphenol (PVP), polyether sulfone (PES), polyimide, polyamide, polyacetal, polycarbonate (PC), polyethylene terephthalate (PET), polyethylene naphthalate (PEN), or a combination thereof. In another embodiment of the present disclosure, the first substrate 101 and the second substrate 201 may also be made of flexible materials. For example, the materials of the first substrate 101 and the second substrate 201 may be polyimide (PI). The first substrate 101 and the second substrate 201 may also be a composite of multiple layers of materials. For example, in one embodiment of the present disclosure, the first substrate 101 and the second substrate 201 may include a bottom film layer, a pressure-sensitive adhesive layer, a first polyimide layer, and a second polyimide layer stacked in sequence.

[0067] Figure 2 is a schematic diagram of the planar structure of the display panel of an embodiment of the present application. As shown in Figure 2, the display panel may include a plurality of pixel units P arranged at intervals, at least one of the plurality of pixel units P includes a first sub-pixel P1 emitting a first color light, a second sub-pixel P2 emitting a second color light, and a third sub-pixel P3 emitting a third color light, and the three sub-pixels may each include a thin film transistor, a pixel electrode, and a common electrode. In an exemplary embodiment, the first sub-pixel P1 may be a red sub-pixel emitting red (R) light, the second sub-pixel P2 may be a green sub-pixel emitting green (G) light, and the third sub-pixel P3 may be a blue sub-pixel emitting blue (B) light. The shape of the sub-pixels in the pixel unit may be rectangular, diamond, pentagonal, or hexagonal, etc. The sub-pixels in the pixel unit may be arranged horizontally, vertically, or in a herringbone manner, which is not limited in this disclosure. In an exemplary embodiment, the pixel unit may include four sub-pixels, which is not limited in this disclosure.

[0068] FIG3 is a schematic cross-sectional view of a display device according to an embodiment of the present application. In an exemplary embodiment, as shown in FIG3 , the display device according to an embodiment of the present application may include a display panel and a light-emitting substrate 300 disposed opposite each other. The display panel may include a first substrate 100 and a second substrate 200 disposed opposite each other, and a liquid crystal layer (not shown) disposed between the first substrate 100 and the second substrate 200. The first substrate 100 is located on a side of the second substrate 200 adjacent to the light-emitting substrate 300. The light-emitting substrate 300 is configured to emit light toward the first substrate 100. The light emitted by the light-emitting substrate 300 may serve as the light emitted by the light-emitting substrate of the display panel.

[0069] In an exemplary embodiment, the light-emitting substrate 300 includes a plurality of light-emitting devices, which may include an organic light-emitting diode (OLED), a light-emitting diode (LED), or a quantum dot light-emitting diode (QLED). The light-emitting layer of the light-emitting device may include an organic material, an inorganic material, quantum dots, an organic material and quantum dots, an inorganic material and quantum dots, or an organic material, an inorganic material, and quantum dots.

[0070] In an exemplary embodiment, the first substrate 100 includes a first substrate 101 and a first dielectric filter layer 31 disposed on a side of the first substrate 101 proximate to the second substrate 200. The first dielectric filter layer 31 is configured to transmit a first color light and a second color light, and reflect a third color light toward the light-emitting substrate 300. For example, the first color light may be red light, the second color light may be green light, and the third color light may be blue light. The first dielectric filter layer 31 has a transmittance of greater than or equal to 90% for the first and second color light, and a reflectance of greater than or equal to 95% for the third color light.

[0071] The display device of the embodiment of the present application can reflect the third color light through the first dielectric filter layer 31 , and the reflected third color light can again excite the light-emitting substrate 300 , thereby increasing the light output intensity of the light-emitting substrate 300 .

[0072] In an exemplary embodiment, the first dielectric filter layer 31 is disposed on the first substrate 101 and is in direct contact with a surface of the first substrate 101 on a side close to the second substrate 200 .

[0073] In an exemplary embodiment, the first dielectric filter layer 31 may be a multi-layer stacked structure. The first dielectric filter layer 31 includes first and second dielectric layers alternately arranged along the thickness direction of the first substrate. The layer of the first dielectric filter layer 31 closer to the first substrate is the first dielectric layer, and the layer of the first dielectric filter layer 31 farther from the first substrate is the second dielectric layer. The refractive index of the first dielectric layer is lower than that of the second dielectric layer.

[0074] In an exemplary embodiment, the first dielectric filter layer 31 may include more than ten or dozens of first dielectric layers and second dielectric layers stacked sequentially along the thickness direction of the first substrate 101. For example, the first dielectric filter layer 31 may include 10, 11, 12, 13, 14, or other number of first dielectric layers and second dielectric layers.

[0075] In exemplary embodiments, the material of the first dielectric layer may include an inorganic material, such as silicon dioxide (SiO 2 ) and magnesium fluoride (MgF 2 ).

[0076] In an exemplary embodiment, the material of the second dielectric layer may include at least one of an inorganic material, a metal oxide, and a metal sulfide. For example, the inorganic material may include silicon nitride (SiN), the metal oxide may include titanium dioxide (TiO2), titanium pentoxide (Ti2O5), niobium pentoxide (Nb2O5), zirconium oxide (ZrO2), yttrium trioxide (Y2O3), etc., and the metal sulfide may include zinc sulfide (ZnS).

[0077] The first dielectric filter layer of the display panel of the embodiment of the present application uses the principle of interference of light in the dielectric layer to achieve light filtering, transmit light of a specific color, and reflect light of a specific color.

[0078] In an exemplary embodiment, the transmittance of the first dielectric filter layer 31 is greater than or equal to 90%, thereby preventing the first dielectric filter layer 31 from absorbing light emitted by the light-emitting substrate. For example, the transmittance of the first dielectric filter layer 31 for both the first color light and the second color light is greater than or equal to 90%.

[0079] In an exemplary embodiment, the first dielectric filter layer includes seven alternating first dielectric layers and seven second dielectric layers. The dielectric layers in the first dielectric filter layer are numbered 1 to 14 along a direction away from the first substrate 101. Among the 14 dielectric layers, odd-numbered layers are first dielectric layers, and even-numbered layers are second dielectric layers. The material of the first dielectric layer is silicon dioxide (SiO2), and the material of the second dielectric layer is niobium pentoxide (Nb2O5).

[0080] As shown in Table 1, the thickness of the first dielectric layer is 22.77 nanometers, the thickness of the second dielectric layer is 41.45 nanometers, the thickness of the third dielectric layer is 38.34 nanometers, the thickness of the fourth dielectric layer is 58.56 nanometers, the thickness of the fifth dielectric layer is 55.06 nanometers, the thickness of the sixth dielectric layer is 45.19 nanometers, the thickness of the seventh dielectric layer is 60.69 nanometers, the thickness of the eighth dielectric layer is 54.1 nanometers, the thickness of the ninth dielectric layer is 51.43 nanometers, the thickness of the tenth dielectric layer is 56.16 nanometers, the thickness of the eleventh dielectric layer is 55.74 nanometers, the thickness of the twelfth dielectric layer is 46.65 nanometers, the thickness of the thirteenth dielectric layer is 69.19 nanometers, and the thickness of the fourteenth dielectric layer is 26.38 nanometers.

[0081] Light transmission simulation experiments were conducted on the first dielectric filter layer having the aforementioned 14-layer dielectric layer structure. The transmittance of the first dielectric filter layer for the first ray (red light) and the second ray (green light) was greater than or equal to 90%, and the reflectivity of the first dielectric filter layer for the third ray (blue light) was greater than or equal to 95%.

[0082] Table 1 Thickness of the dielectric layer in the first dielectric filter layer

[0083] In an exemplary embodiment, the second substrate 200 includes a second substrate 201 and a second structural layer 202 disposed on a side of the second substrate 201 proximal to the first substrate 100. The second structural layer 202 includes at least a first color filter pattern 211, a second color filter pattern 212, a third color filter pattern 213, and a black matrix (not shown). The first color filter pattern 211 is configured to transmit at least a first color light, and the first color filter pattern 211 overlaps with the orthographic projection of the first dielectric filter layer 31 on the first substrate 101. The second color filter pattern 212 is configured to transmit at least a second color light, and the second color filter pattern 212 overlaps with the orthographic projection of the first dielectric filter layer 31 on the first substrate 101. The third color filter pattern 213 is configured to transmit at least a third color light, and the third color filter pattern 213 does not overlap with the orthographic projection of the first dielectric filter layer 31 on the first substrate 101.

[0084] The display device of the embodiment of the present application can filter the light emitted by the light-emitting substrate through the first dielectric filter layer, so that the first dielectric filter layer transmits the first color light and the second color light and reflects the third color light. The first color light and the second color light transmitted by the first dielectric filter layer are incident on the first color filter pattern and the second color filter pattern, and then filtered by the first color filter pattern and the second color filter pattern, so that the first color filter pattern transmits the first color light and the second color filter pattern transmits the second color light, avoiding the first color filter pattern and the second color filter pattern from filtering the third color light, thereby reducing the thickness of the first color filter pattern and the second color filter pattern, reducing the light emitted by the light-emitting substrate being absorbed by the first color filter pattern and the second color filter pattern, improving the light extraction efficiency of the light-emitting substrate and the transmittance of the display device, thereby improving the brightness of the display device and reducing the power consumption of the display device.

[0085] Figure 4 is a schematic cross-sectional view of a display panel according to an embodiment of the present application. In an exemplary embodiment, as shown in Figure 4, the display panel according to the embodiment of the present application may include a first substrate 100 and a second substrate 200 disposed opposite each other, and a liquid crystal layer (not shown) disposed between the first substrate 100 and the second substrate 200. The first substrate 100 may include a first structural layer 102 disposed on a side of the first base 101 facing the second substrate 200, and the second substrate 200 may include a second structural layer 202 disposed on a side of the second base 201 facing the first substrate 100.

[0086] In an exemplary embodiment, the first structure layer 102 includes a first dielectric filter layer 31 disposed on a side of the first substrate 101 close to the second substrate 200, a first organic dielectric layer 12 disposed on a side of the first dielectric filter layer 31 away from the first substrate 101, a first inorganic dielectric layer 13 disposed on a side of the first organic dielectric layer 12 away from the first substrate 101, an active layer 14 disposed on a side of the first inorganic dielectric layer 13 away from the first substrate 101, a gate insulating layer 15 disposed on a side of the active layer 14 away from the first substrate 101, a gate 16 disposed on a side of the gate insulating layer 15 away from the first substrate 101, and a gate electrode 16 disposed on a side of the gate 16 away from the first substrate. The active layer 14, the gate 16, the first electrode 18, and the second electrode 19 are provided on the side of the second inorganic dielectric layer 17 away from the first substrate 101, the second dielectric filter layer 32 is provided on the side of the first electrode 18 and the second electrode 19 away from the first substrate 101, the second organic dielectric layer 20 is provided on the side of the second dielectric filter layer 32 away from the first substrate 101, the common electrode 21 is provided on the side of the second organic dielectric layer 20 away from the first substrate 101, the third inorganic dielectric layer 22 is provided on the side of the common electrode 21 away from the first substrate 101, and the pixel electrode 23 is provided on the side of the third inorganic dielectric layer 22 away from the first substrate 101. The active layer 14, the gate 16, the first electrode 18, and the second electrode 19 can form a thin film transistor of a pixel driving circuit.

[0087] In an exemplary embodiment, the first dielectric filter layer 31 includes a first filtering area 311 and a second filtering area 312. The transmittance of the first filtering area 311 and the second filtering area 312 of the first dielectric filter layer 31 to the first color light and the second color light is greater than or equal to 90%, and the reflectivity to the third color light is greater than or equal to 95.

[0088] In an exemplary embodiment, the cross-sectional shapes of the first filter region 311 and the second filter region 312 of the first dielectric filter layer 31 parallel to the first substrate can both be block-shaped, for example, circular, elliptical, triangular, rectangular, diamond, pentagonal, hexagonal, etc.

[0089] In an exemplary embodiment, a first via hole and a second via hole are formed in the second inorganic dielectric layer 17 and the gate insulating layer 15. The first via hole and the second via hole both extend from the surface of the second inorganic dielectric layer 17 on the side away from the first substrate 101 to the surface of the active layer 14 on the side away from the first substrate 101. The first electrode 18 is connected to the active layer 14 through the first via hole, and the second electrode 19 is connected to the active layer 14 through the second via hole.

[0090] In an exemplary embodiment, a third via hole is formed in the second organic dielectric layer 20. The third via hole extends from the surface of the second organic dielectric layer 20 away from the first substrate 101 to the surface of the first electrode 18 away from the first substrate 101. The common electrode 21 is connected to the first electrode 18 through the third via hole. For first electrodes 18 not covered by the second dielectric filter layer 32, the third via hole penetrates the second organic dielectric layer 20 and extends to the surface of the first electrode 18. For first electrodes 18 covered by the second dielectric filter layer 32, the third via hole penetrates both the second organic dielectric layer 20 and the second dielectric filter layer 32 and extends to the surface of the first electrode 18.

[0091] In an exemplary embodiment, the material of the gate 16 may include a conductive material, and may include, for example, a metal, a conductive metal oxide, a conductive polymer, a conductive composite material, or a combination thereof. For example, the metal may be selected from platinum, gold, silver, aluminum, chromium, nickel, copper, molybdenum, titanium, magnesium, calcium, barium, sodium, palladium, iron, manganese, or a combination thereof. For example, the conductive metal oxide may be selected from indium oxide, tin oxide, indium tin oxide, fluorine-doped tin oxide, aluminum-doped zinc oxide, gallium-doped zinc oxide, or a combination thereof. For example, the conductive polymer may be selected from polyaniline, polypyrrole, polythiophene, polyacetylene, poly(3,4-ethylenedioxythiophene) / polystyrenesulfonic acid (PEDOT / PSS), or a combination thereof. Dopants such as acids (e.g., hydrochloric acid, sulfuric acid, sulfonic acid, etc.), Lewis acids (e.g., phosphorus fluoride, arsenic fluoride, ferric chloride, etc.), halogens, and alkali metals may be added to the conductive polymer. For example, the conductive composite material may be selected from conductive composite materials dispersed with carbon black, graphite powder, metal particles, and the like.

[0092] In an exemplary embodiment, the materials of the first inorganic dielectric layer 13, the second inorganic dielectric layer 17, and the third inorganic dielectric layer 22 may include inorganic insulating materials. For example, the inorganic insulating materials may include silicon oxide, silicon nitride, silicon oxynitride, or other inorganic insulating materials.

[0093] In exemplary embodiments, the material of the active layer 14 may include at least one of metal oxide, low temperature polysilicon, and amorphous silicon.

[0094] In an exemplary embodiment, the first electrode 18 and the second electrode 19 may serve as a source electrode and a drain electrode of a thin film transistor, respectively. The material of the first electrode 18 and the second electrode 19 may include a metal. Exemplarily, the material of the first electrode 18 and the second electrode 19 may include at least one of gold (Au), silver (Ag), aluminum (Al), molybdenum (Mo), chromium (Cr), titanium (Ti), nickel (Ni), neodymium (Nd), and copper (Cu), or any alloy of these metals.

[0095] In an exemplary embodiment, the second dielectric filter layer 32 includes a third filter region 321 and a fourth filter region 322. The third filter region 321 overlaps with the orthographic projection of the second filter region 312 of the first dielectric filter layer 31 on the first substrate 101, while the third filter region 321 does not overlap with the orthographic projection of the first filter region 311 of the first dielectric filter layer 31 on the first substrate 101. The fourth filter region 322 does not overlap with the orthographic projections of the first filter region 311 and the second filter region 312 of the first dielectric filter layer 31 on the first substrate 101. The third filter region 321 and the fourth filter region 322 of the second dielectric filter layer 32 both have a transmittance greater than or equal to 90% for the second color light and the third color light, and a reflectance greater than or equal to 95% for the first color light.

[0096] In an exemplary embodiment, the third filter region 321 and the fourth filter region 322 of the second dielectric filter layer 32 may have a block-shaped cross-sectional shape parallel to the first substrate, such as a circle, an ellipse, a triangle, a rectangle, a diamond, a pentagon, a hexagon, etc.

[0097] In an exemplary embodiment, the materials of the common electrode 21 and the pixel electrode 23 may include a transparent conductive material. For example, the materials of the common electrode 21 and the pixel electrode 23 may include indium tin oxide (ITO), indium zinc oxide (IZO), indium tin zinc oxide (ITZO), or aluminum-doped zinc oxide (AZO).

[0098] In an exemplary embodiment, the second structure layer 202 includes a first color filter pattern 211 , a second color filter pattern 212 , a third color filter pattern 213 and a black matrix (not shown) disposed on a side of the second base 201 close to the first substrate 100 .

[0099] In an exemplary embodiment, the first color filter pattern 211 overlaps with the orthographic projection of the first filter region 311 of the first dielectric filter layer 31 on the first substrate 101, but does not overlap with the orthographic projections of the second filter region 312 of the first dielectric filter layer 31, and the third filter region 321 and fourth filter region 322 of the second dielectric filter layer 32 on the first substrate 101. The first color filter pattern 211 is configured to transmit the first color light L1 and not transmit other color light, such as the second color light L2 and the third color light L3.

[0100] In an exemplary embodiment, the thickness of the first color filter pattern 211 is greater than or equal to 0.5 micrometers and less than or equal to 1.2 micrometers. For example, the thickness of the first color filter pattern 211 is greater than or equal to 0.5 micrometers and less than or equal to 1.2 micrometers.

[0101] In an exemplary embodiment, the second color filter patterns 212 overlap with the orthographic projections of the second filter region 312 of the first dielectric filter layer 31 and the third filter region 321 of the second dielectric filter layer 32 on the first substrate 101, but do not overlap with the orthographic projections of the first filter region 311 of the first dielectric filter layer 31 and the fourth filter region 322 of the second dielectric filter layer 32 on the first substrate 101.

[0102] In an exemplary embodiment, the thickness of the second color filter pattern 212 is greater than or equal to 0.5 micrometers and less than or equal to 1.2 micrometers. For example, the thickness of the second color filter pattern 212 is greater than or equal to 0.5 micrometers and less than or equal to 1.2 micrometers.

[0103] In an exemplary embodiment, the display panel of the present application further includes a planar layer 50. The planar layer 50 is disposed on a side of the first color filter pattern 211, the second color filter pattern 212, and the third color filter pattern 213 that is closer to the first substrate 101. The planar layer 50 and the second color filter pattern 212 are integrally connected and comprise the same material. The planar layer 50 and the second color filter pattern 212 each have a transmittance greater than or equal to 95% for the first color light, the second color light, and the third color light. For example, the planar layer 50 may be made of a light-transmitting organic material.

[0104] In an exemplary embodiment, the third color filter pattern 213 overlaps with the orthographic projection of the fourth filter region 322 of the second dielectric filter layer 32 on the first substrate 101, but does not overlap with the orthographic projections of the third filter region 321 of the second dielectric filter layer 32, the first filter region 311, and the second filter region 312 of the first dielectric filter layer 31 on the first substrate 101; the third color filter pattern 213 is configured to transmit the third color light L3, and not transmit other color light, such as the first color light L1 and the second color light L2.

[0105] In an exemplary embodiment, the black matrix may be located on at least one side of the first color filter pattern 211, at least one side of the second color filter pattern 212, and at least one side of the third color filter pattern 213 to separate adjacent color filter patterns and prevent the emitted light of adjacent color filter patterns from interfering with each other.

[0106] The display panel of the embodiment of the present application can filter the light incident on the first color filter pattern 211 through the first dielectric filter layer 31, so that the first color light L1 and the second color light L2 are incident on the first color filter pattern 211, avoiding the first color filter pattern 211 from filtering the third color light L3, and only filtering the second color light L2, thereby reducing the thickness of the first color filter pattern 211.

[0107] The display panel of the embodiment of the present application can filter the light incident on the second color filter pattern 212 through the first dielectric filter layer 31 and the second dielectric filter layer 32, so that the second color light L2 is incident on the second color filter pattern 212, avoiding the second color filter pattern 212 from filtering the first color light L1 and the third color light L3, reducing the thickness of the second color filter pattern 212, or using a flat layer with a transmittance greater than or equal to 95% as the second color filter pattern 212.

[0108] The display panel of the embodiment of the present application can filter the light incident on the third color filter pattern 213 through the second dielectric filter layer 32, so that the second color light L2 and the third color light L3 are incident on the third color filter pattern 213, avoiding the third color filter pattern 213 from filtering the first color light L1, thereby reducing the thickness of the third color filter pattern 213.

[0109] The display panel of the embodiment of the present application reduces the thickness of the first color filter pattern 211, the second color filter pattern 212, and the third color filter pattern 213, or reduces the thickness of the first color filter pattern 211 and the third color filter pattern 213 so that the second color filter pattern 212 and the flat layer are made of the same material, thereby reducing the absorption of light emitted from the light-emitting substrate by the first color filter pattern 211, the second color filter pattern 212, and the third color filter pattern 213, improving the light extraction efficiency of the light emitted from the light-emitting substrate, thereby improving the brightness of the display panel and reducing the power consumption of the display panel.

[0110] In an exemplary embodiment, the display panel of the embodiment of the present application may include at least one of a curved ADS (Advanced Super Dimension Switch) display panel, a HADS (High Aperture ratio Advanced-Super Dimension Switching) display panel, a VA (Vertical Alignment) display panel, an IPS (In-P lane Switching) display panel, and a TN (Twisted nematic) display panel.

[0111] In some embodiments, the first dielectric filter layer may have a transmittance greater than or equal to 90% for the second color light and the third color light, and a reflectance greater than or equal to 95% for the first color light; or, the first dielectric filter layer may have a transmittance greater than or equal to 90% for the first color light and the third color light, and a reflectance greater than or equal to 95% for the second color light; or, the first dielectric filter layer may have a transmittance greater than or equal to 90% for the first color light, and a reflectance greater than or equal to 95% for the second color light and the third color light; or, the first dielectric filter layer may have a transmittance greater than or equal to 90% for the second color light, and a reflectance greater than or equal to 95% for the first color light and the third color light; or, the first dielectric filter layer may have a transmittance greater than or equal to 90% for the third color light, and a reflectance greater than or equal to 95% for the first color light and the second color light.

[0112] In an exemplary embodiment, at least a portion of the light transmitted by the first dielectric filter layer has the same color as at least a portion of the light transmitted by the overlapping color filter pattern. For example, if the first dielectric filter layer has a transmittance of greater than or equal to 90% for the second and third color light and a reflectance of greater than or equal to 95% for the first color light, the first dielectric filter layer overlaps with the orthographic projections of the second and third color filter patterns in the second substrate on the first base, but does not overlap with the orthographic projection of the first color filter pattern on the first base. The second dielectric filter layer has a transmittance greater than or equal to 90% for the first color light and the second color light, a reflectance greater than or equal to 95% for the third color light, the second dielectric filter layer overlaps with the orthographic projections of the first color filter pattern and the second color filter pattern on the first substrate, and does not overlap with the orthographic projection of the third color filter pattern on the first substrate; or, the second dielectric filter layer has a transmittance greater than or equal to 90% for the first color light and the third color light, a reflectance greater than or equal to 95% for the second color light, the second dielectric filter layer overlaps with the orthographic projections of the first color filter pattern and the third color filter pattern on the first substrate, and does not overlap with the orthographic projection of the second color filter pattern on the first substrate; or, the second dielectric filter layer has a transmittance greater than or equal to 90% for the first color light, a reflectance greater than or equal to 95% for the second color light and the third color light, the second dielectric filter layer overlaps with the orthographic projection of the first color filter pattern on the first substrate, and does not overlap with the orthographic projection of the second color filter pattern and the third color filter pattern on the first substrate.

[0113] The following is an illustrative explanation of the preparation process of the display substrate. The "patterning process" mentioned in the present disclosure includes processes such as coating photoresist, mask exposure, development, etching, and stripping photoresist for metal materials, inorganic materials, or transparent conductive materials, and includes processes such as coating organic materials, mask exposure, and development for organic materials. Deposition can be carried out by any one or more of sputtering, evaporation, and chemical vapor deposition, coating can be carried out by any one or more of spraying, spin coating, and inkjet printing, and etching can be carried out by any one or more of dry etching and wet etching, and the present disclosure does not limit this. "Thin film" refers to a thin film made by deposition, coating, or other processes on a substrate of a certain material. If the "thin film" does not require a patterning process during the entire production process, the "thin film" can also be called a "layer". If the "thin film" requires a patterning process during the entire production process, it is called a "thin film" before the patterning process and a "layer" after the patterning process. The "layer" after the patterning process contains at least one "pattern". As used in this disclosure, "A and B are disposed in the same layer" means that A and B are formed simultaneously through the same patterning process, and the "thickness" of the film layer refers to the dimension of the film layer in a direction perpendicular to the display substrate. In exemplary embodiments of this disclosure, "the orthographic projection of B is within the range of the orthographic projection of A" or "the orthographic projection of A contains the orthographic projection of B" means that the boundary of the orthographic projection of B falls within the boundary of the orthographic projection of A, or that the boundary of the orthographic projection of A overlaps with the boundary of the orthographic projection of B.

[0114] In an exemplary embodiment, the manufacturing process of the display panel of this embodiment may include the following operations.

[0115] (11) Forming an alignment mark and a first dielectric filter layer. In an exemplary embodiment, forming the alignment mark and the first dielectric filter layer includes: first providing a first substrate 101, wherein the first substrate 101 includes a first sub-pixel region 110, a second sub-pixel region 120, and a third sub-pixel region 130; then, depositing a marking film on the first substrate 101, and patterning the marking film using a patterning process so that the marking film forms an alignment mark; finally, forming the first dielectric filter layer 31 on the first substrate 101 using a patterned etching process, as shown in FIG5a.

[0116] In an exemplary embodiment, the alignment mark is located in the non-display area of ​​the display substrate, and the orthographic projection of the alignment mark on the first substrate 101 does not overlap with the first sub-pixel region 110, the second sub-pixel region 120, and the third sub-pixel region 130 of the first substrate 101. The alignment mark is used for alignment with the mask used to subsequently form the first dielectric filter layer 31.

[0117] In an exemplary embodiment, the alignment mark includes a metal material, for example, molybdenum (Mo), aluminum (Al), titanium (Ti), or the like.

[0118] In an exemplary embodiment, the first dielectric filter layer 31 is located in the first sub-pixel region 110 and the second sub-pixel region 120 of the first substrate 101. The first dielectric filter layer 31 includes a first filter region 311 and a second filter region 312. The first filter region 311 is located in the first sub-pixel region 110 of the first substrate 101. The second filter region 312 is located in the second sub-pixel region 120 of the first substrate 101.

[0119] In an exemplary embodiment, the first filter region 311 and the second filter region 312 of the first dielectric filter layer 31 each have a transmittance greater than or equal to 90% for the first color light and the second color light, and a reflectance greater than or equal to 95% for the third color light. For example, the first color light may be red light, the second color light may be green light, and the third color light may be blue light.

[0120] In an exemplary embodiment, the first filter region 311 and the second filter region 312 of the first dielectric filter layer 31 are both configured to reflect the third color light toward the light-emitting substrate, so that the reflected third color light can re-excite the light-emitting substrate, thereby increasing the light output intensity of the light-emitting substrate. The light-emitting substrate is configured to provide light output from the light-emitting substrate to the first substrate.

[0121] In an exemplary embodiment, the cross-sectional shapes of the first filter region 311 and the second filter region 312 of the first dielectric filter layer 31 parallel to the first substrate can both be block-shaped, for example, circular, elliptical, triangular, rectangular, diamond, pentagonal, hexagonal, etc.

[0122] (12) Forming at least one thin film transistor. In an exemplary embodiment, forming at least one thin film transistor may include: on the first substrate forming the aforementioned pattern, first depositing a first organic thin film on the first substrate 101, patterning the first organic thin film using a patterning process, so that the organic thin film forms a first organic dielectric layer 12 covering the first dielectric filter layer 31; then, depositing a first inorganic thin film on the first organic dielectric layer 12, patterning the first inorganic thin film using a patterning process, so that the first inorganic thin film forms a first inorganic dielectric layer 13 disposed on the first organic dielectric layer 12; then, depositing a transparent semiconductor thin film on the first inorganic dielectric layer 13, patterning the transparent semiconductor thin film using a patterning process, so that the transparent semiconductor thin film forms at least one active layer 14 disposed on the first inorganic dielectric layer 13; then, depositing a gate insulating material covering the at least one active layer 14 on the first inorganic dielectric layer 13, patterning the gate insulating material using a patterning process, so that the gate insulating material forms a gate insulating layer 15 covering the at least one active layer 14; then, depositing a first conductive film on the gate insulating layer 15, patterning the gate insulating material using a patterning process, so that the gate insulating material forms a gate insulating layer 15 covering the at least one active layer 14; The first conductive film is patterned using a patterning process to form at least one gate 16 disposed on the gate insulating layer 15, and one gate 16 overlaps with the orthographic projection of one active layer 14 on the first substrate 101; then, a second inorganic film is deposited on the gate insulating layer 15, and the second inorganic film is patterned using a patterning process to form a second inorganic dielectric layer 17 covering the at least one gate 16; then, at least one first via hole and at least one second via hole are formed in the second inorganic dielectric layer 17 and the gate insulating layer 15 using an etching process, and each of the first via hole and the second via hole exposes the surface of one active layer 14; finally, a second conductive film is deposited on the second inorganic dielectric layer 17, and the second conductive film is patterned using a patterning process to form at least one first electrode 18 and at least one second electrode 19 disposed on the second inorganic dielectric layer 17, the first electrode 18 is connected to the exposed active layer 14 through the first via hole, and the second electrode 19 is connected to the exposed active layer 14 through the second via hole, as shown in FIG. 5b . The active layer 14, the gate electrode 16, the first electrode 18, and the second electrode 19 form a thin film transistor of the pixel driving circuit. The first electrode 18 can serve as the source electrode of the thin film transistor, and the second electrode 19 can serve as the drain electrode of the thin film transistor; alternatively, the first electrode 18 can serve as the drain electrode of the thin film transistor, and the second electrode 19 can serve as the source electrode of the thin film transistor.

[0123] In an exemplary embodiment, the orthographic projection of at least one thin film transistor on the first substrate 101 is located in the first sub-pixel area 110, serving as a pixel driving circuit for the first sub-pixel; the orthographic projection of at least one thin film transistor on the first substrate 101 is located in the second sub-pixel area 120, serving as a pixel driving circuit for the second sub-pixel; and the orthographic projection of at least one thin film transistor on the first substrate 101 is located in the third sub-pixel area 130, serving as a pixel driving circuit for the third sub-pixel.

[0124] In exemplary embodiments, the material of the active layer 14 may include at least one of metal oxide, low temperature polysilicon, and amorphous silicon.

[0125] In exemplary embodiments, the metal oxide may include Indium Gallium Zinc Oxide (IGZO), Indium Gallium Oxide (InGaO), Indium Tin Oxide (ITO), Indium Zinc Oxide (IZO), or the like.

[0126] In an exemplary embodiment, the second inorganic dielectric layer 17 may include a first inorganic layer and a second inorganic layer stacked together, wherein the second inorganic layer is located on a side of the first inorganic layer away from the first substrate. The first inorganic layer may include silicon dioxide, and the second inorganic layer may include silicon nitride.

[0127] (13) Forming a second dielectric filter layer. In an exemplary embodiment, forming the second dielectric filter layer may include: forming a second dielectric filter layer 32 on the second inorganic dielectric layer 17 using a patterned etching process on the first substrate having the aforementioned pattern formed thereon, as shown in FIG5c.

[0128] In an exemplary embodiment, forming the second dielectric filter layer 32 on the second inorganic dielectric layer 17 using a patterned etching process may include: depositing a filter dielectric film on the second inorganic dielectric layer 17; then, using an inductively coupled plasma (ICP) dry etching process to etch away the filter dielectric film corresponding to the first sub-pixel region 110 of the first substrate 101, exposing the second inorganic dielectric layer 17 corresponding to the first sub-pixel region 110, and retaining the filter dielectric films corresponding to the second sub-pixel region 120 and the third sub-pixel region 130 of the first substrate 101, thereby forming the second dielectric filter layer 32.

[0129] In an exemplary embodiment, during the process of etching to remove the filter dielectric film, the etching depth can be monitored by an electrophoretic display (EPD) device in an inductively coupled plasma device. When etching reaches the surface of the second inorganic dielectric layer 17, the etching is stopped, thereby removing the filter dielectric film corresponding to the first sub-pixel area 110; alternatively, an over-etching process can be used for the filter dielectric film, that is, after etching reaches the surface of the second inorganic dielectric layer 17, the second inorganic dielectric layer 17 is continued to be etched for a period of time to ensure that the filter dielectric film corresponding to the first sub-pixel area 110 is completely removed.

[0130] In an exemplary embodiment, the orthographic projection of the second dielectric filter layer 32 on the first substrate 101 is located in the second sub-pixel area 120 and the third sub-pixel area 130 of the first substrate 101. The second dielectric filter layer 32 includes a third filter region 321 and a fourth filter region 322. The orthographic projection of the third filter region 321 on the first substrate 101 is located in the second sub-pixel area 120 of the first substrate 101. The third filter region 321 overlaps with the orthographic projection of the second filter region 312 of the first dielectric filter layer 31 on the first substrate 101, but does not overlap with the orthographic projection of the first filter region 311 of the first dielectric filter layer 31 on the first substrate 101. The orthographic projection of the fourth filter region 322 on the first substrate 101 is located in the third sub-pixel area 130 of the first substrate 101, and does not overlap with the orthographic projections of the first filter region 311 and the second filter region 312 of the first dielectric filter layer 31 on the first substrate 101.

[0131] In an exemplary embodiment, the third filter region 321 and the fourth filter region 322 of the second dielectric filter layer 32 each have a transmittance greater than or equal to 90% for the second color light and the third color light, and a reflectance greater than or equal to 95% for the first color light. For example, the first color light may be red light, the second color light may be green light, and the third color light may be blue light.

[0132] In an exemplary embodiment, light passing through the first sub-pixel region 110 passes through the first filter region 311 of the first dielectric filter layer 31 and is emitted from the first substrate. Light passing through the second sub-pixel region 120 sequentially passes through the second filter region 312 of the first dielectric filter layer 31 and the third filter region 321 of the second dielectric filter layer 32 and is emitted from the first substrate. Light passing through the third sub-pixel region 130 passes through the fourth filter region 322 of the second dielectric filter layer 32 and is emitted from the first substrate.

[0133] In an exemplary embodiment, the third filter region 321 and the fourth filter region 322 of the second dielectric filter layer 32 may have a block-shaped cross-sectional shape parallel to the first substrate, such as a circle, an ellipse, a triangle, a rectangle, a diamond, a pentagon, a hexagon, etc.

[0134] In an exemplary embodiment, the second dielectric filter layer 32 may be a multi-layer stacked structure. The second dielectric filter layer 32 includes a third dielectric layer and a fourth dielectric layer alternately arranged along the thickness direction of the first substrate. The film layer of the second dielectric filter layer 32 on the side closest to the first substrate is the third dielectric layer, and the film layer of the second dielectric filter layer 32 on the side away from the first substrate is the fourth dielectric layer. The refractive index of the third dielectric layer is lower than that of the fourth dielectric layer.

[0135] In exemplary embodiments, the material of the third dielectric layer may include an inorganic material, such as silicon dioxide (SiO 2 ) and magnesium fluoride (MgF 2 ).

[0136] In an exemplary embodiment, the material of the fourth dielectric layer may include at least one of an inorganic material, a metal oxide, and a metal sulfide. For example, the inorganic material may include silicon nitride (SiN), the metal oxide may include titanium dioxide (TiO2), titanium pentoxide (Ti2O5), niobium pentoxide (Nb2O5), zirconium oxide (ZrO2), yttrium trioxide (Y2O3), etc., and the metal sulfide may include zinc sulfide (ZnS).

[0137] The second dielectric filter layer of the display panel of the embodiment of the present application uses the principle of interference of light in the dielectric layer to achieve light filtering, transmit light of a specific color, and reflect light of a specific color.

[0138] In an exemplary embodiment, the transmittance of the second dielectric filter layer 32 to the second color light and the third color light is greater than or equal to 90%, thereby preventing the second dielectric filter layer 32 from absorbing the light emitted by the light-emitting substrate.

[0139] (14) Forming a first substrate. In an exemplary embodiment, forming the first substrate may include: first depositing a second organic film on the second dielectric filter layer 32 on the first substrate on which the aforementioned pattern is formed, patterning the second organic film using a patterning process so that the second organic film forms a second organic dielectric layer 20 covering the second dielectric filter layer 32; then, forming at least one third via hole in the second organic dielectric layer 20 using an etching process, wherein each third via hole exposes the surface of a first electrode 18; then, depositing a third conductive film on the second organic dielectric layer 20, patterning the third conductive film using a patterning process so that the third conductive film At least one common electrode 21 is formed on the second organic dielectric layer 20, and the common electrode 21 is connected to the exposed first electrode 18 through a third via hole. Subsequently, a third inorganic thin film is deposited on the second organic dielectric layer 20, and the third inorganic thin film is patterned using a patterning process so that the third inorganic thin film forms a third inorganic dielectric layer 22 covering the at least one common electrode 21. Finally, a fourth conductive film is deposited on the third inorganic dielectric layer 22, and the fourth conductive film is patterned using a patterning process so that the fourth conductive film forms at least one pixel electrode 23 provided on the third inorganic dielectric layer 22, as shown in FIG. 5d.

[0140] In an exemplary embodiment, at least one common electrode 21 overlaps with the orthographic projection of the thin film transistor formed above on the first substrate. For example, at least one common electrode 21 overlaps with the orthographic projection of the first electrode 18, the active layer 14, and the gate electrode 16 on the first substrate. The common electrode 21 overlaps with the orthographic projection of at least one of the first dielectric filter layer 31 and the second dielectric filter layer 32 on the first substrate.

[0141] In an exemplary embodiment, the common electrode 21 is made of a transparent conductive material, such as indium tin oxide (ITO).

[0142] In an exemplary embodiment, at least one pixel electrode 23 overlaps with the orthographic projection of the common electrode 21 on the first substrate. At least one pixel electrode 23 overlaps with the orthographic projection of the thin film transistor formed above on the first substrate. For example, at least one pixel electrode 23 overlaps with the orthographic projection of the first electrode 18, the active layer 14, and the gate electrode 16 on the first substrate. The pixel electrode 23 overlaps with the orthographic projection of at least one of the first dielectric filter layer 31 and the second dielectric filter layer 32 on the first substrate.

[0143] In an exemplary embodiment, the pixel electrode 23 is made of a transparent conductive material, such as indium tin oxide (ITO).

[0144] (15) Aligning the first substrate with the second substrate. In an exemplary embodiment, aligning the first substrate with the second substrate may include: first providing a second substrate 200 on the first substrate on which the aforementioned pattern is formed, the second substrate 200 including a second structural layer 202 disposed on the second substrate 201, the second structural layer 202 including at least a first color filter pattern 211, a second color filter pattern 212, a third color filter pattern 213, and a black matrix (not shown in the figure), and a flat layer 50 disposed on the side of the first color filter pattern 211, the second color filter pattern 212, and the third color filter pattern 213 close to the first substrate 101, the flat layer 50 being integrally connected to the second color filter pattern and comprising the same material, the flat layer 50 having a light transmittance of greater than or equal to 95% for the first color light, the second color light, and the third color light; subsequently, the second structural layer 202 on the second substrate 201 is positioned facing the first structural layer 102 on the first substrate 101; and finally, aligning the first substrate 100 with the second substrate 200, as shown in FIG. 4 .

[0145] In an exemplary embodiment, the orthographic projection of the first color filter pattern 211 on the first substrate 101 is located in the first sub-pixel area 110 of the first substrate 101. The first color filter pattern 211 overlaps with the orthographic projection of the first filter region 311 of the first dielectric filter layer 31 on the first substrate 101, but does not overlap with the orthographic projections of the second filter region 312 of the first dielectric filter layer 31, the third filter region 321, and the fourth filter region 322 of the second dielectric filter layer 32 on the first substrate 101. The first color filter pattern 211 is configured to transmit the first color light L1 and not transmit other color light, such as the second color light L2 and the third color light L3.

[0146] In an exemplary embodiment, the orthographic projection of the second color filter pattern 212 on the first substrate 101 is located in the second sub-pixel region 120 of the first substrate 101. The second color filter pattern 212 overlaps with the orthographic projections of the second filter region 312 of the first dielectric filter layer 31 and the third filter region 321 of the second dielectric filter layer 32 on the first substrate 101, but does not overlap with the orthographic projections of the first filter region 311 of the first dielectric filter layer 31 and the fourth filter region 322 of the second dielectric filter layer 32 on the first substrate 101. The second color filter pattern 212 and the planar layer 50 are made of the same material, and have a transmittance greater than or equal to 95% for the first, second, and third color light.

[0147] In an exemplary embodiment, the orthographic projection of the third color filter pattern 213 on the first substrate 101 is located in the third sub-pixel area 130 of the first substrate 101. The third color filter pattern 213 overlaps with the orthographic projection of the fourth filter region 322 of the second dielectric filter layer 32 on the first substrate 101, but does not overlap with the orthographic projections of the third filter region 321 of the second dielectric filter layer 32, the first filter region 311 and the second filter region 312 of the first dielectric filter layer 31 on the first substrate 101. The third color filter pattern 213 is configured to transmit the third color light L3 and not transmit other color light, such as the first color light L1 and the second color light L2.

[0148] In an exemplary embodiment, the black matrix may be located on at least one side of the first color filter pattern 211, at least one side of the second color filter pattern 212, and at least one side of the third color filter pattern 213 to separate adjacent color filter patterns and prevent the emitted light of adjacent color filter patterns from interfering with each other.

[0149] In an exemplary embodiment, light incident on the first sub-pixel region 110 of the first substrate 101 is filtered by the first filter region 311 of the first dielectric filter layer 31, transmitting the first color light L1 and the second color light L2. The first color light L1 and the second color light L2 are then emitted to the first color filter pattern 211 of the second substrate 200. After filtering by the first color filter pattern 211, the first color light L1 is then transmitted. In the display panel of the present embodiment, the first filter region 311 of the first dielectric filter layer 31 filters the light incident on the first color filter pattern 211, causing the first color light L1 and the second color light L2 to be incident on the first color filter pattern 211 and reflecting the third color light L3. This prevents the first color filter pattern 211 from filtering the third color light L3, allowing only the second color light L2 to be filtered. This reduces the thickness of the first color filter pattern 211, thereby reducing absorption of light emitted from the light-emitting substrate by the first color filter pattern 211 and improving the light extraction efficiency of the light-emitting substrate. For example, the thickness of the first color filter pattern 211 may be greater than or equal to 0.5 micrometers and less than or equal to 1.2 micrometers.

[0150] In an exemplary embodiment, light incident on the second sub-pixel region 120 of the first substrate 101 is filtered by the second filter region 312 of the first dielectric filter layer 31, transmitting the first color light L1 and the second color light L2. The first color light L1 and the second color light L2 are then emitted to the third filter region 321 of the second dielectric filter layer 32. After being filtered by the third filter region 321, the second color light L2 is then transmitted to the second color filter pattern 212 of the second substrate 200. The second color filter pattern 212 does not need to filter the second color light L2 and can directly transmit the second color light L2. The display panel of the embodiment of the present application filters the light incident on the second color filter pattern 212 through the second filter area 312 of the first dielectric filter layer 31 and the third filter area 321 of the second dielectric filter layer 32, so that only the second color light L2 is incident on the second color filter pattern 212, and the first color light L1 and the third color light L3 are reflected, thereby preventing the second color filter pattern 212 from filtering the first color light L1 and the third color light L3, reducing the thickness of the second color filter pattern 212, or using a flat layer material as the second color filter pattern 212, so that the second color filter pattern 212 is configured to transmit all colors of light, reducing the second color filter pattern 212's absorption of the light emitted by the light-emitting substrate, and improving the light extraction efficiency of the light emitted by the light-emitting substrate.

[0151] In an exemplary embodiment, light incident on the third sub-pixel region 130 of the first substrate 101 is filtered by the fourth filter region 322 of the second dielectric filter layer 32, transmitting the second color light L2 and the third color light L3. The second color light L2 and the third color light L3 are then emitted to the third color filter pattern 213 of the second substrate 200. After filtering by the third color filter pattern 213, the third color light L3 is then transmitted. In the display panel of this embodiment of the present application, the fourth filter region 322 of the second dielectric filter layer 32 filters the light incident on the third color filter pattern 213, causing the second color light L2 and the third color light L3 to be incident on the third color filter pattern 213 and reflecting the first color light L1. This prevents the third color filter pattern 213 from filtering the first color light L1, and only filters the second color light L2. This reduces the thickness of the third color filter pattern 213, reduces the absorption of light emitted by the light-emitting substrate by the third color filter pattern 213, and improves the light extraction efficiency of the light-emitting substrate. For example, the thickness of the third color filter pattern 213 may be greater than or equal to 0.5 micrometers and less than or equal to 1.2 micrometers.

[0152] The display panel of the embodiment of the present application can reduce the thickness of the first color filter pattern 211, the second color filter pattern 212, and the third color filter pattern 213 through the first dielectric filter layer 31 and the second dielectric filter layer 32. Alternatively, the thickness of the first color filter pattern 211 and the third color filter pattern 213 can be reduced so that the second color filter pattern 212 uses a flat layer material, thereby reducing the absorption of light emitted from the light-emitting substrate by the first color filter pattern 211, the second color filter pattern 212, and the third color filter pattern 213, improving the light extraction efficiency of the light emitted from the light-emitting substrate, thereby improving the brightness of the display panel and reducing the power consumption of the display panel.

[0153] FIG6 is a schematic cross-sectional view of another display panel according to an embodiment of the present application. In an exemplary embodiment, as shown in FIG6 , the structure of the display panel of this exemplary embodiment is substantially the same as that of the display panel shown in FIG4 , except that the second dielectric filter layer of the display panel of this exemplary embodiment includes a first sub-dielectric filter layer 41 and a second sub-dielectric filter layer 42. The first sub-dielectric filter layer 41 overlaps with the orthographic projection of the first filter region 311 of the first dielectric filter layer 31 on the first substrate 101, but does not overlap with the orthographic projection of the second filter region 312 of the first dielectric filter layer 31 on the first substrate 101. The second sub-dielectric filter layer 42 does not overlap with the orthographic projection of the first filter region 311 and the second filter region 312 of the first dielectric filter layer 31 on the first substrate 101.

[0154] In an exemplary embodiment, the transmittance of the first sub-dielectric filter layer 41 and the second sub-dielectric filter layer 42 to the first color light and the third color light is greater than or equal to 90%, and the reflectivity to the second color light is greater than or equal to 95%.

[0155] In an exemplary embodiment, the cross-sectional shapes of the first sub-dielectric filter layer 41 and the second sub-dielectric filter layer 42 parallel to the first substrate may be block-shaped, for example, circular, elliptical, triangular, rectangular, diamond, pentagonal, hexagonal, etc.

[0156] In an exemplary embodiment, the first color filter pattern 211 overlaps with the orthographic projections of the first sub-dielectric filter layer 41 and the first filter region 311 of the first dielectric filter layer 31 on the first substrate 101, but does not overlap with the orthographic projection of the second sub-dielectric filter layer 42 on the first substrate 101. The second color filter pattern 212 does not overlap with the orthographic projections of the first sub-dielectric filter layer 41 and the second sub-dielectric filter layer 42 on the first substrate 101, but overlaps with the orthographic projection of the second filter region 312 of the first dielectric filter layer 31 on the first substrate 101. The third color filter pattern 213 overlaps with the orthographic projection of the second sub-dielectric filter layer 41 on the first substrate 101, but does not overlap with the orthographic projections of the first sub-dielectric filter layer 41 and the first filter region 311 and the second filter region 312 of the first dielectric filter layer 31 on the first substrate 101.

[0157] In an exemplary embodiment, the display panel of the present application further includes a planar layer 50. The planar layer 50 is disposed on a side of the first color filter pattern 211, the second color filter pattern 212, and the third color filter pattern 213 that is closer to the first substrate 101. The planar layer 50 is integrally connected to the first color filter pattern 211 and comprises the same material. The planar layer 50 and the first color filter pattern 211 each have a transmittance greater than or equal to 95% for the first color light, the second color light, and the third color light. For example, the planar layer 50 may be made of a light-transmitting organic material.

[0158] In an exemplary embodiment, the thickness of the second color filter pattern 212 is greater than or equal to 0.5 micrometers and less than or equal to 1.2 micrometers.

[0159] In an exemplary embodiment, the thickness of the third color filter pattern 213 is greater than or equal to 0.5 micrometers and less than or equal to 1.2 micrometers.

[0160] The display panel of the embodiment of the present application can filter the light incident on the first color filter pattern 211 through the first dielectric filter layer 31 and the first sub-dielectric filter layer 41, so that the first color light L1 is incident on the first color filter pattern 211, and the first color filter pattern 211 is prevented from filtering the second color light L2 and the third color light L3, thereby reducing the thickness of the first color filter pattern 211, or using a flat layer material as the first color filter pattern 211.

[0161] The display panel of the embodiment of the present application can filter the light incident on the second color filter pattern 212 through the first dielectric filter layer 31, so that the first color light L1 and the second color light L2 are incident on the second color filter pattern 212, avoiding the second color filter pattern 212 from filtering the third color light L3, thereby reducing the thickness of the second color filter pattern 212.

[0162] The display panel of the embodiment of the present application can filter the light incident on the third color filter pattern 213 through the second sub-dielectric filter layer 42, so that the first color light L1 and the third color light L3 are incident on the third color filter pattern 213, thereby preventing the third color filter pattern 213 from filtering the second color light L2 and reducing the thickness of the third color filter pattern 213.

[0163] The display panel of the embodiment of the present application reduces the thickness of the first color filter pattern 211, the second color filter pattern 212 and the third color filter pattern 213, or reduces the thickness of the second color filter pattern 212 and the third color filter pattern 213, so that the first color filter pattern 211 uses a flat layer material, thereby reducing the absorption of the light emitted by the light-emitting substrate by the first color filter pattern 211, the second color filter pattern 212 and the third color filter pattern 213, improving the light extraction efficiency of the light emitted by the light-emitting substrate, thereby improving the brightness of the display panel and reducing the power consumption of the display panel.

[0164] Figure 7 is a schematic cross-sectional view of another display panel according to an embodiment of the present application. In the exemplary embodiment, as shown in Figure 7, the structure of the display panel of this exemplary embodiment is substantially the same as that of the display panel shown in Figure 4, except that the second dielectric filter layer 32 of this exemplary embodiment does not overlap with the orthographic projections of the first filter region 311 and the second filter region 312 of the first dielectric filter layer 31 on the first substrate 101. The second dielectric filter layer 32 has a transmittance of greater than or equal to 90% for the third color light and a reflectivity of greater than or equal to 95% for both the first and second color light.

[0165] In an exemplary embodiment, the first color filter pattern 211 overlaps with the orthographic projection of the first filter region 311 of the first dielectric filter layer 31 on the first substrate 101, but does not overlap with the orthographic projections of the second filter region 312 and the second dielectric filter layer 32 of the first dielectric filter layer 31 on the first substrate 101. The second color filter pattern 212 overlaps with the orthographic projection of the second filter region 312 of the first dielectric filter layer 31 on the first substrate 101, but does not overlap with the orthographic projections of the first filter region 311 and the second dielectric filter layer 32 of the first dielectric filter layer 31 on the first substrate 101. The third color filter pattern 213 overlaps with the orthographic projection of the second dielectric filter layer 32 on the first substrate 101, but does not overlap with the orthographic projections of the first filter region 311 and the second filter region 312 of the first dielectric filter layer 31 on the first substrate 101.

[0166] In an exemplary embodiment, the thickness of the first color filter pattern 211 is greater than or equal to 0.5 micrometers and less than or equal to 1.2 micrometers.

[0167] In an exemplary embodiment, the thickness of the second color filter pattern 212 is greater than or equal to 0.5 micrometers and less than or equal to 1.2 micrometers.

[0168] In an exemplary embodiment, the display panel of the present application further includes a planar layer 50. The planar layer 50 is disposed on a side of the first color filter pattern 211, the second color filter pattern 212, and the third color filter pattern 213 that is closer to the first substrate 101. The planar layer 50 and the third color filter pattern 213 are integrally connected and comprise the same material. The planar layer 50 and the third color filter pattern 213 each have a transmittance greater than or equal to 95% for the first color light, the second color light, and the third color light. For example, the planar layer 50 may be made of a light-transmitting organic material.

[0169] The display panel of the embodiment of the present application can filter the light incident on the first color filter pattern 211 through the first filtering area 311 of the first dielectric filter layer 31, so that the first color light L1 and the second color light L2 are incident on the first color filter pattern 211, avoiding the first color filter pattern 211 from filtering the third color light L3, thereby reducing the thickness of the first color filter pattern 211.

[0170] The display panel of the embodiment of the present application can filter the light incident on the second color filter pattern 212 through the second filtering area 312 of the first dielectric filter layer 31, so that the first color light L1 and the second color light L2 are incident on the second color filter pattern 212, avoiding the second color filter pattern 212 from filtering the third color light L3, thereby reducing the thickness of the second color filter pattern 212.

[0171] The display panel of the embodiment of the present application can filter the light incident on the third color filter pattern 213 through the second dielectric filter layer 32, so that the third color light L3 is incident on the third color filter pattern 213, avoiding the third color filter pattern 213 from filtering the first color light L1 and the second color light L2, reducing the thickness of the third color filter pattern 213, or using a flat layer material as the third color filter pattern 213.

[0172] The display panel of the embodiment of the present application reduces the thickness of the first color filter pattern 211, the second color filter pattern 212 and the third color filter pattern 213, or reduces the thickness of the second color filter pattern 212 and the third color filter pattern 213, so that the first color filter pattern 211 uses a flat layer material, thereby reducing the absorption of the light emitted by the light-emitting substrate by the first color filter pattern 211, the second color filter pattern 212 and the third color filter pattern 213, improving the light extraction efficiency of the light emitted by the light-emitting substrate, thereby improving the brightness of the display panel and reducing the power consumption of the display panel.

[0173] Figure 8 is a schematic cross-sectional view of another display panel according to an embodiment of the present application. In an exemplary embodiment, as shown in Figure 8 , the structure of the display panel of this exemplary embodiment is substantially the same as that of the display panel shown in Figure 4 , except that the display panel of this exemplary embodiment further includes a third dielectric filter layer and a third organic dielectric layer 24 . The third dielectric filter layer is disposed on the side of the second organic dielectric layer 20 away from the first substrate 101 , the third organic dielectric layer 24 is disposed on the side of the third dielectric filter layer away from the first substrate 101 , and the common electrode 21 is disposed on the side of the third organic dielectric layer 24 away from the first substrate 101 .

[0174] In an exemplary embodiment, the third dielectric filter layer includes a third sub-dielectric filter layer 43 and a fourth sub-dielectric filter layer 44. The third sub-dielectric filter layer 43 overlaps with the orthographic projection of the first filter region 311 of the first dielectric filter layer 31 on the first substrate 101, but does not overlap with the orthographic projections of the second filter region 312 of the first dielectric filter layer 31, and the third filter region 321 and fourth filter region 322 of the second dielectric filter layer 32 on the first substrate 101. The fourth sub-dielectric filter layer 44 overlaps with the orthographic projection of the fourth filter region 322 of the second dielectric filter layer 32 on the first substrate 101, but does not overlap with the orthographic projections of the first filter region 311 and second filter region 312 of the first dielectric filter layer 31, and the third filter region 321 of the second dielectric filter layer 32 on the first substrate 101.

[0175] In an exemplary embodiment, the transmittance of the third sub-dielectric filter layer 43 and the fourth sub-dielectric filter layer 44 to the first color light and the third color light is greater than or equal to 90%, and the reflectivity to the second color light is greater than or equal to 95%.

[0176] In an exemplary embodiment, the cross-sectional shapes of the third sub-dielectric filter layer 43 and the fourth sub-dielectric filter layer 44 parallel to the first substrate may be block-shaped, for example, circular, elliptical, triangular, rectangular, diamond, pentagonal, hexagonal, etc.

[0177] In an exemplary embodiment, the display panel of the present application further includes a planar layer 50, which is disposed on a side of the second substrate proximate to the first substrate 101. The planar layer 50 is integrally connected to the first, second, and third color filter patterns and is made of the same material. The planar layer 50 has a light transmittance greater than or equal to 95% for the first, second, and third color light. For example, the planar layer 50 may be made of a light-transmitting organic material.

[0178] The display panel of the embodiment of the present application can filter the light incident on the first color filter pattern through the first filter area 311 of the first dielectric filter layer 31 and the third sub-dielectric filter layer 43, so that the first color light L1 is incident on the first color filter pattern, and the first color filter pattern is prevented from filtering the second color light L2 and the third color light L3, thereby reducing the thickness of the first color filter pattern, or using a flat layer material as the first color filter pattern.

[0179] The display panel of the embodiment of the present application can filter the light incident on the second color filter pattern through the second filter area 312 of the first dielectric filter layer 31 and the third filter area 321 of the second dielectric filter layer 32, so that the second color light L2 is incident on the second color filter pattern, thereby preventing the second color filter pattern from filtering the first color light L1 and the third color light L3, reducing the thickness of the second color filter pattern, or using a flat layer material as the second color filter pattern.

[0180] The display panel of the embodiment of the present application can filter the light incident on the third color filter pattern through the fourth filter area 322 of the second dielectric filter layer 32 and the fourth sub-dielectric filter layer 44, so that the third color light L3 is incident on the third color filter pattern, thereby preventing the third color filter pattern from filtering the first color light L1 and the second color light L2, reducing the thickness of the third color filter pattern, or using a flat layer material as the third color filter pattern.

[0181] The display panel of the embodiment of the present application reduces the thickness of the first color filter pattern, the second color filter pattern and the third color filter pattern, or uses a flat layer material as the first color filter pattern, the second color filter pattern and the third color filter pattern, thereby reducing the absorption of the light emitted by the light-emitting substrate by the first color filter pattern, the second color filter pattern and the third color filter pattern, improving the light extraction efficiency of the light emitted by the light-emitting substrate, thereby improving the brightness of the display panel and reducing the power consumption of the display panel.

[0182] Figure 9 is a schematic cross-sectional view of another display panel according to an embodiment of the present application. In an exemplary embodiment, as shown in Figure 9 , the structure of the display panel of this exemplary embodiment is substantially the same as that of the display panel shown in Figure 6 , except that the display panel of this exemplary embodiment further includes a third dielectric filter layer and a third organic dielectric layer 24 . The third dielectric filter layer is disposed on the side of the second organic dielectric layer 20 away from the first substrate 101 , the third organic dielectric layer 24 is disposed on the side of the third dielectric filter layer away from the first substrate 101 , and the common electrode 21 is disposed on the side of the third organic dielectric layer 24 away from the first substrate 101 .

[0183] In an exemplary embodiment, the third dielectric filter layer 33 includes a third sub-dielectric filter layer 43 and a fourth sub-dielectric filter layer 44. The third sub-dielectric filter layer 43 overlaps with the orthographic projection of the second filter region 312 of the first dielectric filter layer 31 on the first substrate 101, but does not overlap with the orthographic projections of the first filter region 311 of the first dielectric filter layer 31 and the first sub-dielectric filter layer 41 on the first substrate 101. The fourth sub-dielectric filter layer 44 overlaps with the orthographic projection of the second sub-dielectric filter layer 42 on the first substrate 101, but does not overlap with the orthographic projections of the first filter region 311 and the second filter region 312 of the first dielectric filter layer 31 and the first sub-dielectric filter layer 41 on the first substrate 101.

[0184] In an exemplary embodiment, the transmittance of the third sub-dielectric filter layer 43 and the fourth sub-dielectric filter layer 44 to the second color light and the third color light is greater than or equal to 90%, and the reflectivity to the first color light is greater than or equal to 95%.

[0185] In an exemplary embodiment, the cross-sectional shapes of the third sub-dielectric filter layer 43 and the fourth sub-dielectric filter layer 44 parallel to the first substrate may be block-shaped, for example, circular, elliptical, triangular, rectangular, diamond, pentagonal, hexagonal, etc.

[0186] In an exemplary embodiment, the display panel of the present application further includes a planar layer 50, which is disposed on a side of the second substrate proximate to the first substrate 101. The planar layer 50 is integrally connected to the first, second, and third color filter patterns and is made of the same material. The planar layer 50 has a light transmittance greater than or equal to 95% for the first, second, and third color light. For example, the planar layer 50 may be made of a light-transmitting organic material.

[0187] The display panel of the embodiment of the present application can filter the light incident on the first color filter pattern through the first filter area 311 of the first dielectric filter layer 31 and the first sub-dielectric filter layer 41, so that the first color light L1 is incident on the first color filter pattern, and the first color filter pattern is prevented from filtering the second color light L2 and the third color light L3, thereby reducing the thickness of the first color filter pattern, or using a flat layer material as the first color filter pattern.

[0188] The display panel of the embodiment of the present application can filter the light incident on the second color filter pattern through the second filter area 312 of the first dielectric filter layer 31 and the third sub-dielectric filter layer 43, so that the second color light L2 is incident on the second color filter pattern, avoiding the second color filter pattern from filtering the first color light L1 and the third color light L3, reducing the thickness of the second color filter pattern, or using a flat layer material as the second color filter pattern.

[0189] The display panel of the embodiment of the present application can filter the light incident on the third color filter pattern through the second sub-dielectric filter layer 42 and the fourth sub-dielectric filter layer 44, so that the third color light L3 is incident on the third color filter pattern, thereby preventing the third color filter pattern from filtering the first color light L1 and the second color light L2, reducing the thickness of the third color filter pattern, or using a flat layer material as the third color filter pattern.

[0190] The display panel of the embodiment of the present application reduces the thickness of the first color filter pattern, the second color filter pattern and the third color filter pattern, or uses a flat layer material as the first color filter pattern, the second color filter pattern and the third color filter pattern, thereby reducing the absorption of the light emitted by the light-emitting substrate by the first color filter pattern, the second color filter pattern and the third color filter pattern, improving the light extraction efficiency of the light emitted by the light-emitting substrate, thereby improving the brightness of the display panel and reducing the power consumption of the display panel.

[0191] Figure 10 is a schematic cross-sectional view of another display panel according to an embodiment of the present application. In an exemplary embodiment, as shown in Figure 10 , the structure of the display panel of this exemplary embodiment is substantially the same as that of the display panel shown in Figure 7 , except that the display panel of this exemplary embodiment further includes a third dielectric filter layer and a third organic dielectric layer 24 . The third dielectric filter layer is disposed on the side of the second organic dielectric layer 20 away from the first substrate 101 , the third organic dielectric layer 24 is disposed on the side of the third dielectric filter layer away from the first substrate 101 , and the common electrode 21 is disposed on the side of the third organic dielectric layer 24 away from the first substrate 101 .

[0192] In an exemplary embodiment, the third dielectric filter layer 33 includes a third sub-dielectric filter layer 43 and a fourth sub-dielectric filter layer 44. The third sub-dielectric filter layer 43 overlaps with the orthographic projection of the first filter region 311 of the first dielectric filter layer 31 on the first substrate 101, but does not overlap with the orthographic projections of the second filter region 312 of the first dielectric filter layer 31 and the second dielectric filter layer 32 on the first substrate 101. The fourth sub-dielectric filter layer 44 overlaps with the orthographic projection of the second filter region 3121 of the first dielectric filter layer 31 on the first substrate 101, but does not overlap with the orthographic projections of the first filter region 311 of the first dielectric filter layer 31 and the second dielectric filter layer 32 on the first substrate 101.

[0193] In an exemplary embodiment, the third sub-dielectric filter layer 43 has a transmittance greater than or equal to 90% for both the first and third color light rays, and a reflectance greater than or equal to 95% for the second color light rays. The fourth sub-dielectric filter layer 44 has a transmittance greater than or equal to 90% for both the second and third color light rays, and a reflectance greater than or equal to 95% for the first color light rays.

[0194] In an exemplary embodiment, the cross-sectional shapes of the third sub-dielectric filter layer 43 and the fourth sub-dielectric filter layer 44 parallel to the first substrate may be block-shaped, for example, circular, elliptical, triangular, rectangular, diamond, pentagonal, hexagonal, etc.

[0195] In an exemplary embodiment, the display panel of the present application further includes a planar layer 50, which is disposed on a side of the second substrate proximate to the first substrate 101. The planar layer 50 is integrally connected to the first, second, and third color filter patterns and is made of the same material. The planar layer 50 has a light transmittance greater than or equal to 95% for the first, second, and third color light. For example, the planar layer 50 may be made of a light-transmitting organic material.

[0196] The display panel of the embodiment of the present application can filter the light incident on the first color filter pattern through the first filter area 311 of the first dielectric filter layer 31 and the third sub-dielectric filter layer 43, so that the first color light L1 is incident on the first color filter pattern, and the first color filter pattern is prevented from filtering the second color light L2 and the third color light L3, thereby reducing the thickness of the first color filter pattern, or using a flat layer material as the first color filter pattern.

[0197] The display panel of the embodiment of the present application can filter the light incident on the second color filter pattern through the second filter area 312 of the first dielectric filter layer 31 and the fourth sub-dielectric filter layer 44, so that the second color light L2 is incident on the second color filter pattern, avoiding the second color filter pattern from filtering the first color light L1 and the third color light L3, reducing the thickness of the second color filter pattern, or using a flat layer material as the second color filter pattern.

[0198] The display panel of the embodiment of the present application can filter the light incident on the third color filter pattern through the second dielectric filter layer 32, so that the third color light L3 is incident on the third color filter pattern, avoiding the third color filter pattern from filtering the first color light L1 and the second color light L2, reducing the thickness of the third color filter pattern, or using a flat layer material as the third color filter pattern.

[0199] The display panel of the embodiment of the present application reduces the thickness of the first color filter pattern, the second color filter pattern and the third color filter pattern, or uses a flat layer material as the first color filter pattern, the second color filter pattern and the third color filter pattern, thereby reducing the absorption of the light emitted by the light-emitting substrate by the first color filter pattern, the second color filter pattern and the third color filter pattern, improving the light extraction efficiency of the light emitted by the light-emitting substrate, thereby improving the brightness of the display panel and reducing the power consumption of the display panel.

[0200] The present disclosure also provides a method for preparing a display panel, comprising:

[0201] forming a first dielectric filter layer on the first substrate;

[0202] Providing a second substrate, the second substrate comprising a first color filter pattern, a second color filter pattern, and a third color filter pattern, wherein the first color filter pattern is configured to transmit at least a first color light, the second color filter pattern is configured to transmit at least a second color light, and the third color filter pattern is configured to transmit at least a third color light;

[0203] The first substrate and the second substrate are arranged in a box; wherein, at least one of the first color filter pattern, the second color filter pattern and the third color filter pattern overlaps with the orthographic projection of the first dielectric filter layer on the first substrate, and at least part of the light transmitted by the first dielectric filter layer has the same color as at least part of the light transmitted by the overlapping color filter pattern.

[0204] The present disclosure also provides a display device including the display panel of the aforementioned exemplary embodiment. The display device can be any product or component with a display function, such as a mobile phone, tablet computer, television, monitor, laptop computer, digital photo frame, or navigation system.

[0205] The drawings in this disclosure only relate to the structures involved in this disclosure, and other structures may refer to general designs. In the absence of conflict, the embodiments of this disclosure, that is, the features in the embodiments, may be combined with each other to obtain new embodiments.

[0206] It should be understood by those skilled in the art that the technical solutions of the present disclosure may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present disclosure, and all should be included in the scope of the claims of the present disclosure.

Claims

1. A display panel, comprising a first substrate and a second substrate arranged opposite to each other, the first substrate comprising a first base and a first dielectric filter layer arranged on a side of the first substrate facing the second substrate, the second substrate comprising a first color filter pattern, a second color filter pattern and a third color filter pattern, the first color filter pattern being configured to transmit at least a first color light, the second color filter pattern being configured to transmit at least a second color light, the third color filter pattern being configured to transmit at least a third color light, at least one of the first color filter pattern, the second color filter pattern and the third color filter pattern overlapping with an orthographic projection of the first dielectric filter layer on the first substrate, and at least part of the light transmitted by the first dielectric filter layer having the same color as at least part of the light transmitted by the overlapping color filter pattern.

2. The display panel according to claim 1, wherein: The transmittance of the first dielectric filter layer to the at least a portion of the transmitted light is greater than or equal to 90%.

3. The display panel according to claim 1, wherein: The first dielectric filter layer includes a first dielectric layer and a second dielectric layer alternately arranged in sequence along the thickness direction of the first substrate, the film layer of the dielectric filter layer close to the first substrate is the first dielectric layer, the film layer of the dielectric filter layer away from the first substrate is the second dielectric layer, and the refractive index of the first dielectric layer is less than the refractive index of the second dielectric layer.

4. The display panel according to claim 1, wherein: The first dielectric filter layer overlaps with the orthographic projections of the first color filter pattern and the second color filter pattern on the first substrate, and does not overlap with the orthographic projection of the third color filter pattern on the first substrate. The transmittance of the first dielectric filter layer to the first color light and the second color light is greater than or equal to 90%.

5. The display panel according to claim 4, wherein: The reflectivity of the first medium filter layer to the third color light is greater than or equal to 95%.

6. The display panel according to claim 1, wherein: The first dielectric filter layer is in direct contact with the first substrate.

7. The display panel according to any one of claims 1 to 6, wherein: The first substrate also includes a second dielectric filter layer, which is arranged on a side of the first dielectric filter layer away from the first base, and the second dielectric filter layer overlaps with the orthographic projections of the second color filter pattern and the third color filter pattern on the first base; the transmittance of the second dielectric filter layer to the second color light and the third color light is greater than or equal to 90%, and the reflectivity of the second dielectric filter layer to the first color light is greater than or equal to 95%.

8. The display panel according to claim 7 further includes a flat layer, which is arranged at least on the side of the second color filter pattern close to the first substrate, the flat layer is connected to the second color filter pattern as a whole, and includes the same material, and the transmittance of the flat layer to the first color light, the second color light and the third color light is greater than or equal to 95%.

9. The display panel according to claim 7, wherein: The thickness of the first color filter pattern is greater than or equal to 0.5 micrometers and less than or equal to 1.2 micrometers; and / or the thickness of the second color filter pattern is greater than or equal to 0.5 micrometers and less than or equal to 1.2 micrometers.

10. The display panel according to claim 7, wherein: The first substrate further includes a third dielectric filter layer, which is arranged on a side of the second dielectric filter layer away from the first base, and includes a third sub-dielectric filter layer and a fourth sub-dielectric filter layer. The third sub-dielectric filter layer overlaps with an orthographic projection of the first color filter pattern on the first base, and the fourth sub-dielectric filter layer overlaps with an orthographic projection of the third color filter pattern on the first base. The transmittance of the third sub-dielectric filter layer and the fourth sub-dielectric filter layer to the first color light and the third color light is greater than or equal to 90%, and the reflectivity to the second color light is greater than or equal to 95%.

11. The display panel according to claim 10, further includes a flat layer, wherein the flat layer is at least arranged on a side of the first color filter pattern and the third color filter pattern close to the first substrate, the flat layer is connected to the first color filter pattern and the third color filter pattern as a whole, and includes the same material, and the transmittance of the flat layer to the first color light, the second color light and the third color light is greater than or equal to 95%.

12. The display panel according to any one of claims 1 to 6, wherein: The first substrate also includes a second dielectric filter layer, which is arranged on a side of the first dielectric filter layer away from the first base, and the second dielectric filter layer includes a first sub-dielectric filter layer and a second sub-dielectric filter layer, the first sub-dielectric filter layer overlaps with an orthographic projection of the first color filter pattern on the first base, and the second sub-dielectric filter layer overlaps with an orthographic projection of the third color filter pattern on the first base, and the transmittance of the first sub-dielectric filter layer and the second sub-dielectric filter layer to the first color light and the third color light is greater than or equal to 90%, and the reflectivity to the second color light is greater than or equal to 95%.

13. The display panel according to claim 12 further includes a flat layer, wherein the flat layer is at least arranged on a side of the first color filter pattern close to the first substrate, the flat layer is connected to the first color filter pattern as a whole, and includes the same material, and the transmittance of the flat layer to the first color light, the second color light and the third color light is greater than or equal to 95%.

14. The display panel according to claim 12, wherein: The thickness of the second color filter pattern is greater than or equal to 0.5 micrometers and less than or equal to 1.2 micrometers; and / or the thickness of the third color filter pattern is greater than or equal to 0.5 micrometers and less than or equal to 1.2 micrometers.

15. The display panel according to claim 12, wherein: The first substrate further includes a third dielectric filter layer, which is arranged on a side of the second dielectric filter layer away from the first substrate, and includes a third sub-dielectric filter layer and a fourth sub-dielectric filter layer. The third sub-dielectric filter layer overlaps with an orthographic projection of the second color filter pattern on the first substrate, and the transmittance of the third sub-dielectric filter layer to the second color light and the third color light is greater than or equal to 90%, and the reflectance to the first color light is greater than or equal to 95%; the fourth sub-dielectric filter layer overlaps with an orthographic projection of the third color filter pattern on the first substrate, and the transmittance of the fourth sub-dielectric filter layer to the second color light and the third color light is greater than or equal to 90%, and the reflectance to the first color light is greater than or equal to 95%.

16. The display panel according to claim 15, further includes a flat layer, wherein the flat layer is at least arranged on a side of the second color filter pattern and the third color filter pattern close to the first substrate, the flat layer is connected to the second color filter pattern and the third color filter pattern as a whole, and includes the same material, and the transmittance of the flat layer to the first color light, the second color light and the third color light is greater than or equal to 95%.

17. The display panel according to any one of claims 1 to 6, wherein: The first substrate also includes a second dielectric filter layer, which is arranged on a side of the first dielectric filter layer away from the first base, and the second dielectric filter layer overlaps with the orthographic projection of the third color filter pattern on the first base, and the transmittance of the second dielectric filter layer to the third color light is greater than or equal to 90%, and the reflectivity of the second dielectric filter layer to the first color light and the second color light is greater than or equal to 95%.

18. The display panel according to claim 17, wherein: It also includes a flat layer, which is at least arranged on a side of the third color filter pattern close to the first substrate. The flat layer is connected to the third color filter pattern as a whole and includes the same material. The transmittance of the flat layer to the first color light, the second color light and the third color light is greater than or equal to 95%.

19. The display panel according to claim 17, wherein: The thickness of the first color filter pattern is greater than or equal to 0.5 micrometers and less than or equal to 1.2 micrometers; and / or the thickness of the second color filter pattern is greater than or equal to 0.5 micrometers and less than or equal to 1.2 micrometers.

20. The display panel according to claim 17, wherein: The first substrate further includes a third dielectric filter layer, which is arranged on a side of the second dielectric filter layer away from the first substrate, and includes a third sub-dielectric filter layer and a fourth sub-dielectric filter layer. The third sub-dielectric filter layer overlaps with an orthographic projection of the first color filter pattern on the first substrate, and the transmittance of the third sub-dielectric filter layer to the first color light and the third color light is greater than or equal to 90%, and the reflectance to the second color light is greater than or equal to 95%; the fourth sub-dielectric filter layer overlaps with an orthographic projection of the second color filter pattern on the first substrate, and the transmittance of the fourth sub-dielectric filter layer to the second color light and the third color light is greater than or equal to 90%, and the reflectance to the first color light is greater than or equal to 95%.

21. The display panel according to claim 20 further includes a flat layer, wherein the flat layer is at least arranged on a side of the first color filter pattern and the second color filter pattern close to the first substrate, the flat layer is connected to the first color filter pattern and the second color filter pattern as a whole, and includes the same material, and the transmittance of the flat layer to the first color light, the second color light and the third color light is greater than or equal to 95%.

22. The display panel according to any one of claims 1 to 6, wherein: The first substrate also includes a pixel driving circuit arranged on a side of the first dielectric filter layer away from the first substrate, the pixel driving circuit includes at least one thin film transistor, the thin film transistor includes an active layer, a gate, a first electrode and a second electrode, the active layer is arranged on a side of the first dielectric filter layer away from the first substrate, the gate is arranged on a side of the active layer away from the first substrate, the gate overlaps with the orthographic projection of the active layer on the first substrate, the first electrode and the second electrode are arranged on a side of the gate away from the first substrate, and the first electrode and the second electrode are respectively connected to the active layer.

23. The display panel according to any one of claims 1 to 6, wherein: The first substrate further includes an alignment mark disposed on the first base, the alignment mark being disposed on a side of the at least one dielectric filter layer close to the first base, and the alignment mark not overlapping with an orthographic projection of the at least one dielectric filter layer on the first base.

24. A display device comprising the display panel according to any one of claims 1 to 23.

25. A method for preparing a display panel, comprising: forming a first dielectric filter layer on the first substrate; Providing a second substrate, the second substrate comprising a first color filter pattern, a second color filter pattern and a third color filter pattern, the first color filter pattern being configured to transmit at least a first color light, the second color filter pattern being configured to transmit at least a second color light, and the third color filter pattern being configured to transmit at least a third color light; The first substrate and the second substrate are arranged in a box; wherein at least one of the first color filter pattern, the second color filter pattern and the third color filter pattern overlaps with the orthographic projection of the first dielectric filter layer on the first substrate, and at least part of the light transmitted by the first dielectric filter layer has the same color as at least part of the light transmitted by the overlapping color filter pattern.

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