Display panel, preparation method thereof and display device

Abstract

This invention provides a display panel, its manufacturing method, and a display device. The display panel includes a substrate; a light-emitting layer disposed on one side of the substrate; a functional layer disposed on the side of the light-emitting layer opposite to the substrate, including a first functional portion, a second functional portion, and a third functional portion spaced apart along a first direction; the orthographic projections of the first, second, and third functional portions on the substrate overlap with the orthographic projections of the light-emitting layer on the substrate; and a filter layer disposed on the side of the functional layer opposite to the substrate; the orthographic projection of the filter layer on the substrate at least covers the orthographic projections of the first and second functional portions on the substrate, and the orthographic projection of the filter layer on the substrate does not overlap with the orthographic projection of the third functional portion on the substrate. This invention solves the problem of sub-pixel crosstalk and improves the display effect of the display panel by providing a filter layer above the functional layer to filter light not absorbed by the functional layer.

Description

Technical Field

[0001] This invention relates to the field of display technology, and in particular to a display panel, its manufacturing method, and a display device. Background Technology

[0002] Quantum dots (QDs), as a new generation of light-emitting materials, possess advantages such as high luminous efficiency, high color purity, and long lifespan, and are expected to be applied to novel light-emitting diodes (LEDs) to replace organic light-emitting diodes (OLEDs). Therefore, quantum dot light-emitting diodes (QLEDs) using quantum dot materials as the light-emitting layer have become a major research direction for novel display devices.

[0003] However, the display performance of QLED-based display devices needs further improvement. Summary of the Invention

[0004] The purpose of this invention is to provide a display panel and its manufacturing method, as well as a display device, to solve the problem of subpixel crosstalk.

[0005] To achieve the above objectives, the present invention provides a display panel, the display panel comprising:

[0006] substrate; A light-emitting layer is disposed on one side of the substrate; A functional layer is disposed on the side of the light-emitting layer opposite to the substrate, and includes a first functional part, a second functional part, and a third functional part spaced apart along a first direction; the orthographic projections of the first functional part, the second functional part, and the third functional part on the substrate overlap with the orthographic projection of the light-emitting layer on the substrate; A filter layer is disposed on the side of the functional layer opposite to the substrate; the orthographic projection of the filter layer on the substrate at least covers the orthographic projections of the first functional part and the second functional part on the substrate, and the orthographic projection of the filter layer on the substrate does not overlap with the orthographic projection of the third functional part on the substrate.

[0007] In one embodiment, in the second direction, the thickness of the filter layer is 1-3 μm, and the material of the filter layer has a transmittance of less than 4% for light in the first wavelength range and a transmittance of more than 90% for light in the second wavelength range; wherein the first direction intersects the second direction; In one embodiment, the first wavelength range is less than or equal to 460 nm; the second wavelength range is greater than or equal to 500 nm. In one embodiment, the first wavelength range is 430-460 nm; the second wavelength range is 500-730 nm.

[0008] In one embodiment, the first functional part comprises a first quantum dot material having an emission peak wavelength of 610-730 nm; the second functional part comprises a second quantum dot material having an emission peak wavelength of 500-560 nm; and the third functional part comprises a transparent resin material having a transmittance of greater than 95% for light within the first wavelength range. In one embodiment, the display panel further includes: A first encapsulation layer is disposed on the side of the functional layer opposite to the substrate; the first encapsulation layer at least covers the first functional part, the second functional part, and the third functional part; A color filter layer is disposed on the side of the first encapsulation layer opposite to the substrate; the color filter layer includes a first color filter, a second color filter, and a third color filter, and in a second direction, the first color filter, the second color filter, and the third color filter correspond to the first functional part, the second functional part, and the third functional part, respectively; A protective layer is disposed on the side of the color filter layer opposite to the substrate; the orthographic projections of the first color filter, the second color filter, and the third color filter on the substrate are all located within the orthographic projection range of the protective layer on the substrate; A cover plate is disposed on the side of the protective layer opposite to the substrate; The second encapsulation layer is disposed on the side of the light-emitting layer opposite to the substrate.

[0009] In one embodiment, the filter layer is located on the side of the first encapsulation layer opposite to the substrate; the filter layer covers a portion of the first encapsulation layer; The first color filter and the second color filter are both disposed on the side of the filter layer away from the substrate, and are in contact with the surface of the filter layer away from the substrate, respectively. The third color filter is disposed on the side of the first encapsulation layer away from the substrate, and is in contact with the surface of the first encapsulation layer away from the substrate.

[0010] In one embodiment, the filter layer is located on the side of the color filter layer opposite to the substrate; the filter layer covers the first color filter and the second color filter, and the orthographic projection of the filter layer on the substrate does not overlap with the orthographic projection of the third color filter on the substrate; The protective layer is disposed on the side of the filter layer opposite to the substrate, and it at least covers the filter layer and the third color filter.

[0011] In one embodiment, the filter layer is located on the side of the protective layer opposite to the substrate; the filter layer covers a portion of the protective layer; The cover plate is disposed on the side of the filter layer opposite to the substrate, and it covers the filter layer and part of the protective layer.

[0012] The present invention also provides a method for manufacturing a display panel, the method comprising the steps of: Provide a substrate; A light-emitting layer is prepared on one side of the substrate; A functional layer is formed on the side of the light-emitting layer opposite to the substrate; the functional layer includes a first functional portion, a second functional portion, and a third functional portion spaced apart along a first direction; the orthographic projections of the first functional portion, the second functional portion, and the third functional portion on the substrate overlap with the orthographic projection of the light-emitting layer on the substrate; A filter layer is prepared on the side of the functional layer opposite to the substrate; the orthographic projection of the filter layer on the substrate at least covers the orthographic projections of the first functional part and the second functional part layer on the substrate, and the orthographic projection of the filter layer on the substrate does not overlap with the orthographic projection of the third functional part on the substrate.

[0013] In one embodiment, the method further includes: A first encapsulation layer is formed on the side of the functional layer opposite to the substrate; the first encapsulation layer at least covers the first functional part, the second functional part and the third functional part; A color filter layer is formed on the side of the first encapsulation layer opposite to the substrate; the color filter layer includes a first color filter, a second color filter, and a third color filter; in a second direction, the first color filter, the second color filter, and the third color filter correspond to the first functional part, the second functional part, and the third functional part, respectively; wherein, the first direction intersects the second direction; A protective layer is prepared on the side of the color filter layer opposite to the substrate; the orthographic projections of the first color filter, the second color filter, and the third color filter on the substrate are all located within the orthographic projection range of the protective layer on the substrate; A cover plate is prepared on the side of the protective layer opposite to the substrate.

[0014] In one embodiment, the step of fabricating a filter layer on the side of the functional layer opposite to the substrate includes: A full-surface filter layer is coated on the side of the first encapsulation layer facing away from the substrate; The entire filter layer is patterned to form the filter layer; In one embodiment, the step of fabricating a filter layer on the side of the functional layer opposite to the substrate includes: A full-surface filter layer is coated on the side of the color filter layer facing away from the substrate; The entire filter layer is patterned, and the filter layer on the side of the third color filter facing away from the substrate is removed; In one embodiment, the step of fabricating a filter layer on the side of the functional layer opposite to the substrate includes: A full-surface filter layer is coated on the side of the protective layer facing away from the substrate; The entire filter layer is patterned to form the filter layer.

[0015] The present invention also provides a display device comprising the above-described display panel.

[0016] The present invention proposes a display panel that achieves absorption and conversion of different colors of light by setting a functional layer containing quantum dot materials, and uses a selectively covered filter layer to filter unabsorbed light. While ensuring that the current sub-pixel emits light normally, it suppresses crosstalk of light from other sub-pixels, thereby improving the display effect of the display panel. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the structure of a display panel in the prior art; Figure 2 A schematic diagram of the structure of a display panel provided by the present invention; Figure 3 This is a schematic diagram of the structure of another display panel provided by the present invention; Figure 4 This is a schematic diagram of another display panel structure provided by the present invention; Figure 5 This is a flowchart of a method for preparing a display panel according to an embodiment of the present invention; Figure 6 A flowchart illustrating a method for manufacturing a display panel provided by the present invention; Figure 7 A flowchart illustrating another method for manufacturing a display panel provided by the present invention; Figure 8 A flowchart of another method for manufacturing a display panel provided by the present invention; Figure 9 This is a schematic diagram of a display device structure provided by the present invention. Detailed Implementation

[0019] The following description, with reference to the accompanying drawings, illustrates preferred embodiments of the present invention, demonstrating its implementability. These embodiments provide a complete overview of the invention for those skilled in the art, making its technical content clearer and easier to understand. The present invention can be embodied in many different forms of embodiments, and the scope of protection of the present invention is not limited to the embodiments mentioned herein.

[0020] In the accompanying drawings, components with the same structure are indicated by the same numerical designation, and components with similar structures or functions are indicated by similar numerical designations. The dimensions and thicknesses of each component shown in the drawings are arbitrary, and the present invention does not limit the dimensions and thicknesses of each component. To make the illustrations clearer, the thickness of components is appropriately exaggerated in some places in the drawings.

[0021] Furthermore, the following descriptions of the embodiments of the invention are made with reference to the accompanying illustrations, illustrating specific embodiments in which the invention can be implemented. Directional terms used in this invention, such as "upper," "lower," "front," "rear," "left," "right," "inner," "outer," and "side," are merely directional references to the accompanying drawings. Therefore, the use of directional terms is for better and clearer explanation and understanding of the invention, and does not indicate or imply that the referred device or element must have a specific orientation, or be constructed and operated in a specific orientation; therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0022] When a component is described as being "on" another component, the component may be placed directly on the other component; alternatively, there may be an intermediate component on which the component is placed, and the intermediate component is placed on the other component. When a component is described as being "installed to" or "connected to" another component, both can be understood as being directly "installed" or "connected" to, or as being indirectly "installed to" or "connected to" another component via an intermediate component.

[0023] Please refer to Figure 1 , Figure 1This is a schematic diagram of the structure of a QLED display panel in the prior art. The display panel 200 includes a substrate 10, a light-emitting layer 20, a functional layer 30, a first encapsulation layer 40, a color filter layer 50, a protective layer 60, and a cover plate 70. The light-emitting layer 20 uses a blue OLED as a backlight source; the functional layer 30 includes a first functional part 31, a second functional part 32, and a third functional part 33 disposed above the light-emitting layer 20; the first functional part 31 and the second functional part 32 respectively include a first quantum dot material and a second quantum dot material, and the third functional part 33 includes a transparent resin material. In this display panel 200, the first functional part 31 and the second functional part 32 respectively convert part of the blue light emitted from the light-emitting layer 20 into red light and green light through corresponding quantum dots, while the blue light also passes through the third functional part 33, and finally passes through the first color filter 51, the second color filter 52, and the third color filter 53 in the color filter layer 50 to form a high color purity full-color display.

[0024] In this structure, researchers found that the quantum dot layer, typically coated as a thin film on top of the blue OLED (i.e., the light-emitting layer), has a thickness and material concentration limited by the manufacturing process, making it difficult to achieve complete absorption of all blue light. Specifically, a portion of the blue light incident on the first functional section 31 (e.g., the red quantum dot layer) or the second functional section 32 (e.g., the green quantum dot layer) passes directly through the quantum dot layer without being absorbed or converted by the corresponding quantum dots. This leaked blue light wavelength is mainly concentrated around 460 nm, which has high energy. If it continues to propagate upwards to the color filter layer 50, it may be transmitted through the color filter portion, which should only transmit red or green light. Taking the generation of red sub-pixels as an example, the design goal of the red color filter (e.g., the first color filter 51) is to have high transmittance in the red light band (approximately 610 nm-730 nm), while blocking other bands (especially blue light) as much as possible. However, limited by the absorption characteristics of the color filter material and the film thickness, the transmittance of existing red color filters for blue light around 460 nm is not completely zero. Therefore, when the leaked blue light reaches the red color filter, some of it penetrates and mixes with the red light that should have been emitted, resulting in blue components being mixed into the red pixels. Similarly, the green color filter in the green sub-pixels cannot completely block blue light, causing blue light crosstalk in the green pixels as well. This crosstalk leads to a decrease in the color purity of both red and green pixels, causing the mixed color to deviate from the standard color gamut, thus reducing the color gamut coverage of the display panel and impairing color performance. This defect significantly affects the user experience, especially in applications requiring high color gamut. Furthermore, due to the combined effects of incomplete quantum dot absorption and insufficient color filter filtering, the degree of crosstalk intensifies with increasing blue light leakage and color filter transmittance. Therefore, how to suppress crosstalk caused by blue light leakage in QLED display panels and improve the display color gamut without affecting brightness and process compatibility has become a pressing technical problem for those skilled in the art.

[0025] To address the aforementioned technical problems, this invention provides a display panel, please refer to [reference needed]. Figure 2 The display panel 200 includes: substrate; A light-emitting layer is disposed on one side of the substrate; A functional layer is disposed on the side of the light-emitting layer away from the substrate, and includes a first functional part, a second functional part, and a third functional part disposed at intervals along a first direction; the orthographic projections of the first functional part, the second functional part, and the third functional part on the substrate overlap with the orthographic projections of the light-emitting layer on the substrate. A filter layer is disposed on the side of the functional layer away from the substrate; the orthographic projection of the filter layer on the substrate at least covers the orthographic projections of the first functional part and the second functional part on the substrate, and the orthographic projection of the filter layer on the substrate does not overlap with the orthographic projection of the third functional part on the substrate.

[0026] In this embodiment, the substrate 10 includes a substrate and a thin-film transistor (TFT) array formed on the substrate. The TFT array is used to independently control the light emission state of each sub-pixel. A planarization layer is formed above the TFT array to provide a planarized surface. Then, a first electrode conductive layer is deposited on the planarization layer and patterned by photolithography etching to form independent first electrode patterns corresponding to each sub-pixel. In this embodiment, the first electrode can be an anode, and the first electrode can be a metal material with high reflectivity such as indium tin oxide (ITO) or silver (Ag) to improve light extraction efficiency. The light-emitting layer 20 is disposed on one side of the substrate 10. In this embodiment, the light-emitting layer 20 is a backlight capable of emitting blue light, such as a blue OLED light-emitting layer. The functional layer 30 is disposed on the light-emitting side of the light-emitting layer 20 and includes a first functional portion 31, a second functional portion 32, and a third functional portion 33 arranged at intervals along a direction parallel to the plane of the substrate 10 (i.e., the first direction X). To ensure that each functional unit can effectively receive light from the light-emitting layer 20, the orthographic projections of the first functional unit 31, the second functional unit 32, and the third functional unit 33 on the substrate 10 are located within the orthographic projection range of the light-emitting layer 20 on the substrate 10. The filter layer 80 is disposed on the side of the functional layer 30 facing away from the substrate 10, i.e., above the functional layer 30. To effectively suppress blue light crosstalk, the orthographic projection of the filter layer 80 on the substrate 10 at least covers the orthographic projections of the first functional unit 31 and the second functional unit 32 on the substrate 10, while this orthographic projection does not overlap with the orthographic projection of the third functional unit 33 on the substrate 10. Alternatively, the filter layer 80 may only cover the areas requiring filtering, without covering areas that do not require filtering.

[0027] In one embodiment of the present invention, in the direction perpendicular to the plane of the substrate 10 (i.e., the second direction Y), the thickness of the filter layer 80 is 1-3 μm, and the material of the filter layer 80 has a transmittance of less than 4% for light in the first wavelength range and a transmittance of more than 90% for light in the second wavelength range; wherein, the first wavelength range is less than or equal to 460 nm, for example, the first wavelength range is 430-460 nm, which is mainly concentrated in the blue light band; the second wavelength range is greater than or equal to 500 nm, for example, the second wavelength range is 500-730 nm, which includes the green light and red light bands.

[0028] In one embodiment of the present invention, the first functional part 31 includes a first quantum dot material, and the emission peak wavelength of the first quantum dot material is 610-730nm; the second functional part 32 includes a second quantum dot material, and the emission peak wavelength of the second quantum dot material is 500-560nm; the third functional part 33 includes a transparent resin material, which has a transmittance of more than 95% for light with wavelengths within 460nm, allowing blue light to be emitted directly without wavelength conversion.

[0029] In this embodiment, the light emitted from the light-emitting layer 20 propagates upwards to the functional layer 30, with the main energy of the light concentrated in the wavelength range around 460 nm (i.e., blue light). When the light reaches the first functional section 31, since this section contains a first quantum dot material that can absorb blue light, the blue photons are absorbed by the quantum dots and excite electron-hole pairs; then, the electron-hole pairs recombine, emitting red light with a wavelength in the range of 610 nm to 730 nm. Similarly, when the blue light reaches the second functional section 32, the second quantum dot material therein absorbs the blue photons and emits green light with a wavelength in the range of 500 nm to 560 nm. Thus, the blue light is converted into the desired sub-pixel light in the first functional section 31 and the second functional section 32. However, since the absorption capacity of the quantum dot material is limited, it cannot completely absorb the light, so a small amount of blue light will not be absorbed and will directly pass through the first functional section 31 and the second functional section 32, forming residual blue light. When blue light reaches the third functional section 33, because it partially contains a transparent resin material with a transmittance of over 95% for blue light below 460 nm, the blue light can pass through the third functional section 33 almost undamaged, without wavelength conversion, retaining its original blue properties. Subsequently, all light continues to propagate upwards to the filter layer 80. Since the filter layer 80 only covers the first functional section 31 and the second functional section 32 in the horizontal direction, but not the third functional section 33, above the first and second functional sections 31 and 32, the filter layer 80 blocks residual blue light (its transmittance for light below 460 nm is less than 2%), while allowing red and green light generated by quantum dot conversion to pass through efficiently (its transmittance for light above 500 nm is greater than 90%). Thus, residual blue light in the red and green pixels is filtered out, retaining only pure red or green light. Above the third functional section 33, since there is no filter layer 80 covering it, the directly transmitted blue light is unobstructed and continues to exit along its original path. Through the above process, the light emitted from the display panel ultimately results in pure red light emanating from the area corresponding to the first functional unit 31, pure green light emanating from the area corresponding to the second functional unit 32, and pure blue light emanating from the area corresponding to the third functional unit 33. These three elements spatially constitute red, green, and blue sub-pixels respectively, collectively achieving high color purity full-color display.

[0030] In summary, the embodiments of the present invention achieve the conversion of blue light to red / green light by setting a functional layer containing quantum dot materials, and at the same time use a selectively covered filter layer to filter the residual blue light after conversion. While ensuring that the blue sub-pixels emit light normally, the crosstalk of blue light in the red and green pixels is effectively suppressed, thereby improving the display effect of the display panel.

[0031] Please continue to refer to this. Figure 2 In one embodiment of the present invention, the display panel 200 further includes: A first encapsulation layer is disposed on the side of the functional layer opposite to the substrate; the first encapsulation layer at least covers the first functional part, the second functional part, and the third functional part; A color filter layer is disposed on the side of the first encapsulation layer away from the substrate; the color filter layer includes a first color filter, a second color filter and a third color filter, and in a second direction, the first color filter, the second color filter and the third color filter correspond to the first functional part, the second functional part and the third functional part, respectively; A protective layer is disposed on the side of the color filter layer facing away from the substrate; the orthographic projections of the first color filter, the second color filter, and the third color filter on the substrate are all within the orthographic projection range of the protective layer on the substrate. A cover plate is located on the side of the protective layer away from the substrate.

[0032] In this embodiment, the first encapsulation layer 40 covers the functional layer 30 and provides water and oxygen barrier protection for the underlying quantum dot material and OLED device, preventing performance degradation caused by external environmental corrosion. The first encapsulation layer 40 can be made of inorganic materials (such as silicon nitride, silicon oxide) or an organic-inorganic multilayer structure, with high transparency and good coverage, ensuring that the areas where each functional part is located are effectively sealed. The color filter layer 50 is disposed above the first encapsulation layer 40 and includes color filters corresponding to each sub-pixel, namely, a first color filter 51 (e.g., a red filter) corresponding to the first functional part 31, a second color filter 52 (e.g., a green filter) corresponding to the second functional part 32, and a third color filter 53 (e.g., a blue filter) corresponding to the third functional part 33. The color filter layer 50 further purifies the color purity of the light after it has been converted or transmitted by the functional layer 30: a red filter allows red light to pass through while absorbing stray light of other wavelengths, a green filter allows green light to pass through while absorbing stray light of other wavelengths, and a blue filter allows blue light to pass through while absorbing stray light of other wavelengths. Thus, the color purity of the light emitted from each sub-pixel is further improved after secondary filtering by the color filter layer 50. A protective layer 60 (also known as a planarization layer or OC layer) is disposed above the color filter layer 50. It flattens the surface undulations formed by the color filter layer 50 and protects the underlying color filter layer 50 from damage caused by subsequent processes or external stresses. The protective layer 60 is typically made of a highly transparent organic resin material with excellent leveling and light transmittance, providing a smooth surface for the subsequent bonding of the cover plate 70. The cover plate 70 is bonded to the protective layer 60 and serves as the outermost protective structure of the display panel 200. It is typically made of glass or a transparent polymer material to support and protect the entire display panel while providing good optical transmittance. In some embodiments, the display panel 200 further includes a second encapsulation layer 21 disposed on the side of the light-emitting layer 20 away from the substrate 10.

[0033] Please continue to refer to this. Figure 2 , Figure 2This is a schematic diagram of a display panel structure according to an embodiment of the present invention. The display panel 200 includes a substrate 10, a light-emitting layer 20, a functional layer 30, a first encapsulation layer 40, a color filter layer 50, a protective layer 60, and a cover plate 70. Their positional relationships and functions are as described above. In this embodiment, the filter layer 80 is located between the first encapsulation layer 40 and the color filter layer 50. Specifically, the first encapsulation layer 40 is an inorganic or organic-inorganic multilayer film covering the functional layer 30, and its surface is a continuous and flat plane. The filter layer 80 is formed on the upper surface of the first encapsulation layer 40 through patterning processes such as coating, exposure, and development. Since the formed filter layer 80 is not a full surface, but only covers the area that needs to be filtered (i.e., the area corresponding to the first functional part 31 and the second functional part 32), the filter layer 80 is located on the side of the first encapsulation layer 40 away from the substrate 10, and covers part of the first encapsulation layer 40. That is, in the area corresponding to the first functional part 31 and the second functional part 32, the upper surface of the first encapsulation layer 40 is covered by the filter layer 80; in the area corresponding to the third functional part 33, the upper surface of the first encapsulation layer 40 is exposed and not covered by the filter layer 80, thereby forming a height difference on the upper surface of the first encapsulation layer 40 corresponding to the thickness of the filter layer 80. The subsequent color filter layer 50 is formed on the filter layer 80 and the exposed encapsulation layer. Specifically, the first color filter 51 and the second color filter 52 are both disposed on the side of the filter layer 80 away from the substrate 10 and are in contact with the surface of the filter layer 80 away from the substrate 10 (i.e., the upper surface). The third color filter 53 is disposed on the side of the first encapsulation layer 40 away from the substrate 10 and is in contact with the surface of the first encapsulation layer 40 away from the substrate 10 (i.e., the upper surface). Since the color filter layer 50 itself has a certain thickness and can naturally cover the underlying stepped structure through the coating process during manufacturing, the height difference caused by the filter layer 80 will not affect the function of the color filter layer 50. In addition, the subsequently disposed protective layer 60 (OC layer) has excellent planarization performance and can further fill the surface undulations on the color filter layer 50, providing a flat surface for the cover plate 70 to be attached.

[0034] In this embodiment, the light emitted from the light-emitting layer 20 (e.g., blue light) propagates upward to the functional layer 30. In the functional layer 30, the first quantum dot material (red quantum dot material) in the first functional section 31 absorbs blue light and converts it into red light, the second quantum dot material (green quantum dot material) in the second functional section 32 absorbs blue light and converts it into green light, while the transparent resin material in the third functional section 33 allows blue light to pass through directly without wavelength conversion. Due to the limited absorption capacity of the quantum dot material, a small amount of unabsorbed residual blue light passes through the first functional section 31 and the second functional section 32. Subsequently, the light enters the first encapsulation layer 40. This encapsulation layer acts as a water and oxygen barrier layer, protecting the underlying quantum dot material and OLED device, while its high transparency ensures that light passes through almost without damage. After passing through the first encapsulation layer 40, the light reaches the patterned filter layer 80. Since the filter layer 80 is only disposed above the first functional unit 31 and the second functional unit 32, in the corresponding area, the filter layer 80 efficiently filters residual blue light while allowing red and green light to pass through. Above the third functional unit 33, since there is no filter layer 80 covering it, the directly passing blue light is unobstructed and continues to exit along its original path. The light processed by the filter layer 80 continues upward into the color filter layer 50. Specifically, the first color filter 51 (red filter) corresponding to the first functional unit 31 allows red light to pass through and absorbs stray light of other wavelengths; the second color filter 52 (green filter) corresponding to the second functional unit 32 allows green light to pass through and absorbs stray light of other wavelengths; and the third color filter 53 (blue filter) corresponding to the third functional unit 33 allows blue light to pass through and absorbs stray light of other wavelengths. The color filter layer 50 performs secondary purification of the light, further filtering out any stray light that may be present, ensuring that the color purity of the light emitted from each sub-pixel reaches its optimal level. Finally, the light passes through the planarizing protective layer 60 (OC layer) and the supporting cover plate 70, and exits to the outside of the display panel. The protective layer 60 fills in the surface undulations caused by the patterning of the filter layer 80, providing a smooth interface for the cover plate 70 to adhere, while protecting the underlying film layer from mechanical damage. Through the cooperation of the above-mentioned film layers, this embodiment realizes the complete process from blue light excitation to color light purification, effectively suppressing color crosstalk and improving the display effect of the display panel.

[0035] Please refer to Figure 3 , Figure 3This is a schematic diagram of a display panel structure according to another embodiment of the present invention. The display panel 200 includes a substrate 10, a light-emitting layer 20, a functional layer 30, a first encapsulation layer 40, a color filter layer 50, a protective layer 60, and a cover plate 70. Their positional relationships and functions are as described above. In this embodiment, the filter layer 80 is located between the color filter layer 50 and the protective layer 60. Specifically, the color filter layer 50 is formed on the upper surface of the first encapsulation layer 40, and it includes a first color filter 51, a second color filter 52, and a third color filter 53 corresponding to each sub-pixel. Since the color filter layer 50 is manufactured through a patterning process, its surface forms fine undulations corresponding to the thickness of each color filter. The filter layer 80 is formed on the upper surface of the color filter layer 50 through patterning processes such as coating, exposure, and development. Since the filter layer 80 is not laid across the entire surface, but only covers the areas requiring light filtering (i.e., the areas corresponding to the first functional part 31 and the second functional part 32), the filter layer 80 is located on the side of the color filter layer 50 facing away from the substrate 10. The filter layer 80 covers the first color filter 51 and the second color filter 52, and its orthographic projection on the substrate 10 does not overlap with the orthographic projection of the third color filter 53 on the substrate 10. That is, in the area corresponding to the first functional part 31 and the second functional part 32, the upper surface of the color filter layer 50 is covered by the filter layer 80; in the area corresponding to the third functional part 33, the upper surface of the color filter layer 50 is exposed and not covered by the filter layer 80. The subsequent protective layer 60 (OC layer) is formed on the side of the filter layer 80 facing away from the substrate 10, and it covers at least the filter layer 80 and the third color filter 53. Since the protective layer 60 is made of a highly transparent organic resin material, it has good leveling and planarization capabilities, and can form a flat upper surface on the stepped structure created by the filter layer 80, providing an interface for the subsequent bonding of the cover plate 70.

[0036] In this embodiment, the light emitted from the light-emitting layer 20 (e.g., blue light) propagates upward to the functional layer 30. In the functional layer 30, the first quantum dot material (red quantum dot material) in the first functional section 31 absorbs blue light and converts it into red light, the second quantum dot material (green quantum dot material) in the second functional section 32 absorbs blue light and converts it into green light, while the transparent resin material in the third functional section 33 allows blue light to pass through directly without wavelength conversion. Due to the limited absorption capacity of the quantum dot material, a small amount of unabsorbed residual blue light passes through the first functional section 31 and the second functional section 32. Subsequently, the light passes through the first encapsulation layer 40 and enters the color filter layer 50. The color filter layer 50 performs the first purification of the light: the first color filter 51 (red filter) corresponding to the first functional unit 31 allows red light to pass through and absorbs stray light of other wavelengths; the second color filter 52 (green filter) corresponding to the second functional unit 32 allows green light to pass through and absorbs stray light of other wavelengths; and the third color filter 53 (blue filter) corresponding to the third functional unit 33 allows blue light to pass through and absorbs stray light of other wavelengths. The light, after initial purification by the color filter layer 50, continues to propagate upwards to the patterned filter layer 80. Since the filter layer 80 is only disposed above the first color filter 51 and the second color filter 52, in the corresponding area, the filter layer 80 filters any remaining blue light while allowing red and green light to pass through; above the third color filter 53, since there is no filter layer 80 covering it, the blue light is unobstructed and continues to exit along its original path. Finally, the light passes through the protective layer 60, which has a planarization function, and the cover plate 70, which provides support and protection, and exits to the outside of the display panel. The protective layer 60 fills in the surface undulations caused by the patterning of the filter layer 80, providing a smooth interface for the cover plate 70 to adhere, while protecting the underlying film layer from mechanical damage. Through the above process, this embodiment achieves another structural layout in which the filter layer 80 is disposed above the color filter layer 50, which can also effectively filter out residual blue light in the red and green pixels and improve the display effect of the display panel.

[0037] Please refer to Figure 4 , Figure 4This is a schematic diagram of a display panel structure according to another embodiment of the present invention. The display panel 200 includes a substrate 10, a light-emitting layer 20, a functional layer 30, a first encapsulation layer 40, a color filter layer 50, a protective layer 60, and a cover plate 70. Their positional relationships and functions are as described above. In this embodiment, the filter layer 80 is located between the protective layer 60 and the cover plate 70. Specifically, the protective layer 60 is formed on the upper surface of the color filter layer 50, and it is made of a highly transparent organic resin material. A flat upper surface is formed through a coating and curing process to planarize the lower color filter layer 50. The filter layer 80 is formed on the upper surface of the protective layer 60 through patterning processes such as coating, exposure, and development. Since the filter layer 80 is not laid across the entire surface, but only covers the areas requiring light filtering (i.e., the areas corresponding to the first functional section 31 and the second functional section 32), the filter layer 80 is located on the side of the protective layer 60 facing away from the substrate 10, and partially covers the protective layer 60. Specifically, in the areas corresponding to the first functional section 31 and the second functional section 32, the upper surface of the protective layer 60 is covered by the filter layer 80; while in the area corresponding to the third functional section 33, the upper surface of the protective layer 60 is exposed and not covered by the filter layer 80. The cover plate 70 is bonded to the filter layer 80 and the exposed protective layer 60 using optically clear adhesive (OCA) or other bonding processes. Because the cover plate 70 bonding layer has a certain thickness and fluidity, it can adapt to the small step structure formed by the filter layer 80 below, without affecting the overall bonding quality and optical performance.

[0038] In this embodiment, the light emitted from the light-emitting layer 20 (e.g., blue light) propagates upward to the functional layer 30. In the functional layer 30, the first quantum dot material (red quantum dot material) in the first functional section 31 absorbs blue light and converts it into red light, the second quantum dot material (green quantum dot material) in the second functional section 32 absorbs blue light and converts it into green light, while the transparent resin material in the third functional section 33 allows blue light to pass through directly without wavelength conversion. Due to the limited absorption capacity of the quantum dot material, a small amount of unabsorbed residual blue light passes through the first functional section 31 and the second functional section 32. Subsequently, the light passes through the first encapsulation layer 40 and enters the color filter layer 50. The color filter layer 50 performs the first purification of the light: the first color filter 51 (red filter) corresponding to the first functional unit 31 allows red light to pass through and absorbs stray light of other wavelengths; the second color filter 52 (green filter) corresponding to the second functional unit 32 allows green light to pass through and absorbs stray light of other wavelengths; and the third color filter 53 (blue filter) corresponding to the third functional unit 33 allows blue light to pass through and absorbs stray light of other wavelengths. The light purified by the color filter layer 50 continues to propagate upwards, passing through the planarization protective layer 60 and reaching the patterned filter layer 80. Since the filter layer 80 is only disposed above the areas corresponding to the first and second functional units 31, it performs a final filter on any remaining blue light in those areas, while allowing red and green light to pass through. Above the area corresponding to the third functional unit 33, since there is no filter layer 80 covering it, blue light passes directly through the protective layer 60 and the cover plate 70 without any obstruction. Finally, the light passes through the cover plate 70 and exits to the outside of the display panel. The filter layer 80 is disposed between the protective layer 60 and the cover plate 70, serving as the last barrier in the optical path. This ensures that even if trace amounts of blue light remain in the red and green pixels after passing through the color filter layer 50, they can be effectively filtered out, thereby further improving color purity. Through the above process, this embodiment achieves another structural layout where the filter layer 80 is disposed above the protective layer 60, providing a final guarantee for blue light filtering and also solving the color crosstalk problem, thus improving the display effect of the display panel.

[0039] Secondly, the present invention also provides a method for manufacturing a display panel. Please refer to [reference needed]. Figure 5 The method includes the following steps: S100, Provides a substrate; S200, Prepare a light-emitting layer on one side of the substrate; S300, A functional layer is prepared on the side of the light-emitting layer away from the substrate; the functional layer includes a first functional part, a second functional part and a third functional part disposed at intervals along a first direction; the orthographic projections of the first functional part, the second functional part and the third functional part on the substrate overlap with the orthographic projections of the light-emitting layer on the substrate. S400. A filter layer is prepared on the side of the functional layer away from the substrate. The orthogonal projection of the filter layer on the substrate at least covers the orthogonal projections of the first functional part and the second functional part layer on the substrate, and the orthogonal projection of the filter layer on the substrate does not overlap with the orthogonal projection of the third functional part on the substrate.

[0040] In this embodiment, the substrate 10 includes a substrate and a thin-film transistor (TFT) array formed on the substrate. The TFT array is used to independently control the light emission state of each sub-pixel. A planarization layer is formed above the TFT array to provide a planarized surface. Then, a first electrode conductive layer is deposited on the planarization layer and patterned by photolithography etching to form independent first electrode patterns corresponding to each sub-pixel. In this embodiment, the first electrode can be an anode, and the first electrode can be a metal material with high reflectivity such as indium tin oxide (ITO) or silver (Ag) to improve light extraction efficiency. The light-emitting layer 20 is disposed on one side of the substrate 10. In this embodiment, the light-emitting layer 20 is a backlight capable of emitting blue light, such as a blue OLED light-emitting layer 20. The functional layer 30 is disposed on the light-emitting side of the light-emitting layer 20 and includes a first functional portion 31, a second functional portion 32, and a third functional portion 33 arranged at intervals along a direction parallel to the plane of the substrate 10 (i.e., the first direction X). To ensure that each functional layer 30 can effectively receive light from the light-emitting layer 20, the orthographic projections of the first functional unit 31, the second functional unit 32, and the third functional unit 33 on the substrate 10 are located within the orthographic projection range of the light-emitting layer 20 on the substrate 10. The filter layer 80 is disposed on the side of the functional layer 30 facing away from the substrate 10, i.e., above the functional layer 30. To effectively suppress blue light crosstalk, the orthographic projection of the filter layer 80 on the functional layer 30 at least covers the first functional unit 31 and the second functional unit 32, while this orthographic projection does not overlap with the third functional unit 33. Alternatively, the filter layer 80 may only cover the areas requiring filtering, without covering areas that do not require filtering.

[0041] In one embodiment of the present invention, in the direction perpendicular to the plane of the substrate 10 (i.e., the second direction Y), the thickness of the filter layer 80 is 1-3 μm, and the material of the filter layer 80 has a transmittance of less than 4% for light in the first wavelength range and a transmittance of more than 90% for light in the second wavelength range; wherein, the first wavelength range is less than or equal to 460 nm, for example, the first wavelength range is 430-460 nm, which is mainly concentrated in the blue light band; the second wavelength range is greater than or equal to 500 nm, for example, the second wavelength range is 500-730 nm, which includes the green light and red light bands.

[0042] In one embodiment of the present invention, the first functional part 31 includes a first quantum dot material, and the emission peak wavelength of the first quantum dot material is 610-730nm; the second functional part 32 includes a second quantum dot material, and the emission peak wavelength of the second quantum dot material is 500-560nm; the third functional part 33 includes a transparent resin material, which has a transmittance of more than 95% for light with wavelengths within 460nm, allowing blue light to be emitted directly without wavelength conversion.

[0043] In one embodiment of the present invention, the method further includes: A first encapsulation layer is formed on the side of the functional layer away from the substrate; the first encapsulation layer at least covers the first functional part, the second functional part and the third functional part; A color filter layer is formed on the side of the first encapsulation layer facing away from the substrate; the color filter layer includes a first color filter, a second color filter, and a third color filter; in a second direction, the first color filter, the second color filter, and the third color filter correspond to the first functional part, the second functional part, and the third functional part, respectively; wherein, the first direction intersects the second direction; A protective layer is prepared on the side of the color filter layer that is away from the substrate; the orthographic projections of the first color filter, the second color filter, and the third color filter on the substrate are all within the orthographic projection range of the protective layer on the substrate. A cover plate is prepared on the side of the protective layer that faces away from the substrate.

[0044] Based on the above structure, the present invention provides a method for manufacturing a display panel. Please refer to... Figure 6 , Figure 6 This is a flowchart of a method for manufacturing a display panel, specifically: S100, Provides a substrate; S200, Prepare a light-emitting layer on one side of the substrate; S300, A functional layer is prepared on the side of the light-emitting layer away from the substrate; the functional layer includes a first functional part, a second functional part and a third functional part disposed at intervals along a first direction; the orthographic projections of the first functional part, the second functional part and the third functional part on the substrate overlap with the orthographic projections of the light-emitting layer on the substrate. S350. A first encapsulation layer is prepared on the side of the functional layer away from the substrate; the first encapsulation layer at least covers the first functional part, the second functional part and the third functional part; S400a, A full-surface filter layer is coated on the side of the first encapsulation layer facing away from the substrate; S400b: Graphicalize the entire filter layer to form the filter layer; S500: A first color filter and a second color filter are prepared on the side of the filter layer facing away from the substrate; a third color filter is prepared on the side of the first encapsulation layer facing away from the substrate. S600, A protective layer is prepared on the side of the color filter layer away from the substrate; the orthographic projections of the first color filter, the second color filter, and the third color filter on the substrate are all within the orthographic projection range of the protective layer on the substrate. S700, Prepare a cover plate on the side of the protective layer away from the substrate.

[0045] In this embodiment, the filter layer 80 is located between the first encapsulation layer 40 and the color filter layer 50. Specifically, the first encapsulation layer 40 is an inorganic or organic-inorganic multilayer film covering the functional layer 30, and its surface is a continuous and flat plane. The filter layer 80 is formed on the upper surface of the first encapsulation layer 40 by a patterning process such as exposure or etching. The color filter layer 50 is formed on the filter layer 80 and the exposed encapsulation layer, that is, the first color filter 51 and the second color filter 52 are both disposed on the side of the filter layer 80 away from the substrate 10 and are in contact with the surface of the filter layer 80 away from the substrate 10 (i.e., the upper surface), while the third color filter 53 is disposed on the side of the first encapsulation layer 40 away from the substrate 10 and is in contact with the surface of the first encapsulation layer 40 away from the substrate 10 (i.e., the upper surface). In addition, the subsequently disposed protective layer 60 (OC layer) has excellent planarization performance, which can fill the surface undulations on the color filter layer 50 and provide a flat surface for the cover plate 70 to be attached.

[0046] In this embodiment, the light emitted from the light-emitting layer 20 (e.g., blue light) propagates upward to the functional layer 30. In the functional layer 30, the first quantum dot material (red quantum dot material) in the first functional section 31 absorbs blue light and converts it into red light, the second quantum dot material (green quantum dot material) in the second functional section 32 absorbs blue light and converts it into green light, while the transparent resin material in the third functional section 33 allows blue light to pass through directly without wavelength conversion. Due to the limited absorption capacity of the quantum dot material, a small amount of unabsorbed residual blue light passes through the first functional section 31 and the second functional section 32. Subsequently, the light enters the first encapsulation layer 40. This encapsulation layer acts as a water and oxygen barrier layer, protecting the underlying quantum dot material and OLED device, while its high transparency ensures that light passes through almost without damage. After passing through the first encapsulation layer 40, the light reaches the patterned filter layer 80. Since the filter layer 80 is only disposed above the first functional unit 31 and the second functional unit 32, in the corresponding area, the filter layer 80 efficiently filters residual blue light while allowing red and green light to pass through. Above the third functional unit 33, since there is no filter layer 80 covering it, the directly passing blue light is unobstructed and continues to exit along its original path. The light processed by the filter layer 80 continues upward into the color filter layer 50. Specifically, the first color filter 51 (red filter) corresponding to the first functional unit 31 allows red light to pass through and absorbs stray light of other wavelengths; the second color filter 52 (green filter) corresponding to the second functional unit 32 allows green light to pass through and absorbs stray light of other wavelengths; and the third color filter 53 (blue filter) corresponding to the third functional unit 33 allows blue light to pass through and absorbs stray light of other wavelengths. The color filter layer 50 performs secondary purification of the light, further filtering out any stray light that may be present, ensuring that the color purity of the light emitted from each sub-pixel reaches its optimal level. Finally, the light passes through the planarization protective layer 60 (OC layer) and the support and protection cover plate 70, and exits to the outside of the display panel. This embodiment realizes the complete process from blue light excitation to color light purification, effectively suppressing color crosstalk and improving the display effect of the display panel.

[0047] Please refer to Figure 7 , Figure 7 This is a flowchart illustrating another method for manufacturing a display panel provided by the present invention, specifically: S100, Provides a substrate; S200, Prepare a light-emitting layer on one side of the substrate; S300, A functional layer is prepared on the side of the light-emitting layer away from the substrate; the functional layer includes a first functional part, a second functional part and a third functional part disposed at intervals along a first direction; the orthographic projections of the first functional part, the second functional part and the third functional part on the substrate overlap with the orthographic projections of the light-emitting layer on the substrate. S350. A first encapsulation layer is prepared on the side of the functional layer away from the substrate; the first encapsulation layer at least covers the first functional part, the second functional part and the third functional part; S360. A color filter layer is prepared on the side of the first encapsulation layer away from the substrate; the color filter layer includes a first color filter, a second color filter, and a third color filter; in a second direction, the first color filter, the second color filter, and the third color filter correspond to the first functional unit, the second functional unit, and the third functional unit, respectively. S400a: A full-surface filter layer is coated on the side of the color filter layer facing away from the substrate. S400b: Pattern the entire filter layer and remove the filter layer on the side of the third color filter that faces away from the substrate. S500: A protective layer is prepared on the side of the filter layer away from the substrate, and the protective layer covers at least the filter layer and the third color filter. S600: Prepare a cover plate on the side of the protective layer away from the substrate.

[0048] In this embodiment, the filter layer 80 is located between the color filter layer 50 and the protective layer 60. Specifically, the first encapsulation layer 40 is an inorganic or organic-inorganic multilayer film covering the functional layer 30, and its surface is a continuous and flat plane. The color filter layer 50 is formed on the upper surface of the first encapsulation layer 40, and it includes a first color filter 51, a second color filter 52, and a third color filter 53 corresponding to each sub-pixel. The filter layer 80 is formed on the first color filter 51 and the second color filter 52 through a patterning process such as exposure or etching. The protective layer 60 is formed on the side of the filter layer 80 facing away from the substrate 10, and it at least covers the filter layer 80 and the third color filter 53. Since the protective layer 60 is made of a highly transparent organic resin material, it has good leveling and planarization capabilities, and can form a flat upper surface on the stepped structure created by the filter layer 80, providing an interface for the final bonding of the cover plate 70.

[0049] In this embodiment, the light emitted from the light-emitting layer 20 (e.g., blue light) propagates upward to the functional layer 30. In the functional layer 30, the first quantum dot material (red quantum dot material) in the first functional section 31 absorbs blue light and converts it into red light, the second quantum dot material (green quantum dot material) in the second functional section 32 absorbs blue light and converts it into green light, while the transparent resin material in the third functional section 33 allows blue light to pass through directly without wavelength conversion. Due to the limited absorption capacity of the quantum dot material, a small amount of unabsorbed residual blue light passes through the first functional section 31 and the second functional section 32. Subsequently, the light passes through the first encapsulation layer 40 and enters the color filter layer 50. The color filter layer 50 performs the first purification of the light: the first color filter 51 (red filter) corresponding to the first functional unit 31 allows red light to pass through and absorbs stray light of other wavelengths; the second color filter 52 (green filter) corresponding to the second functional unit 32 allows green light to pass through and absorbs stray light of other wavelengths; and the third color filter 53 (blue filter) corresponding to the third functional unit 33 allows blue light to pass through and absorbs stray light of other wavelengths. The light, after initial purification by the color filter layer 50, continues to propagate upwards to the patterned filter layer 80. Since the filter layer 80 is only disposed above the first color filter 51 and the second color filter 52, in the corresponding area, the filter layer 80 filters out any possible residual blue light while allowing red and green light to pass through; above the third color filter 53, since there is no filter layer 80 covering it, the blue light is unobstructed and continues to exit along its original path. Finally, the light passes through the protective layer 60 (OC layer) which has a planarization function and the cover plate 70 which provides support and protection, and exits to the outside of the display panel. This embodiment realizes another structural layout in which the filter layer 80 is disposed above the color filter layer 50, which can also effectively filter out residual blue light in red and green pixels and improve the display effect of the display panel.

[0050] Please refer to Figure 8 , Figure 8 This is a flowchart illustrating another method for manufacturing a display panel provided by the present invention, specifically: S100, Provides a substrate; S200, Prepare a light-emitting layer on one side of the substrate; S300, A functional layer is prepared on the side of the light-emitting layer away from the substrate; the functional layer includes a first functional part, a second functional part and a third functional part disposed at intervals along a first direction; the orthographic projections of the first functional part, the second functional part and the third functional part on the substrate overlap with the orthographic projections of the light-emitting layer on the substrate. S350. A first encapsulation layer is prepared on the side of the functional layer away from the substrate; the first encapsulation layer at least covers the first functional part, the second functional part and the third functional part; S360. A color filter layer is prepared on the side of the first encapsulation layer away from the substrate; the color filter layer includes a first color filter, a second color filter, and a third color filter; in a second direction, the first color filter, the second color filter, and the third color filter correspond to the first functional unit, the second functional unit, and the third functional unit, respectively. S370. A protective layer is prepared on the side of the color filter layer facing away from the substrate; the orthographic projections of the first color filter, the second color filter, and the third color filter on the substrate are all within the orthographic projection range of the protective layer on the substrate. S400a: A full-surface filter layer is coated on the side of the protective layer facing away from the substrate. S400b: Graphicalize the entire filter layer to form the filter layer; S500: A cover plate is prepared on the side of the filter layer away from the substrate, and the cover plate covers the filter layer and part of the protective layer.

[0051] In this embodiment, the filter layer 80 is located between the protective layer 60 and the cover plate 70. Specifically, the protective layer 60 is formed on the upper surface of the color filter layer 50, and it is made of a highly transparent organic resin material. A coating and curing process is used to form a smooth upper surface, thereby planarizing the lower color filter layer 50. The filter layer 80 is formed on the upper surface of the protective layer 60 through patterning processes such as exposure or etching. The cover plate 70 is attached to the filter layer 80 and the exposed protective layer 60 using optically clear adhesive (OCA) or other bonding processes.

[0052] In this embodiment, the light emitted from the light-emitting layer 20 (e.g., blue light) propagates upward to the functional layer 30. In the functional layer 30, the first quantum dot material (red quantum dot material) in the first functional section 31 absorbs blue light and converts it into red light, the second quantum dot material (green quantum dot material) in the second functional section 32 absorbs blue light and converts it into green light, while the transparent resin material in the third functional section 33 allows blue light to pass through directly without wavelength conversion. Due to the limited absorption capacity of the quantum dot material, a small amount of unabsorbed residual blue light passes through the first functional section 31 and the second functional section 32. Subsequently, the light passes through the first encapsulation layer 40 and enters the color filter layer 50. The color filter layer 50 performs the first purification of the light: the first color filter 51 (red filter) corresponding to the first functional unit 31 allows red light to pass through and absorbs stray light of other wavelengths; the second color filter 52 (green filter) corresponding to the second functional unit 32 allows green light to pass through and absorbs stray light of other wavelengths; and the third color filter 53 (blue filter) corresponding to the third functional unit 33 allows blue light to pass through and absorbs stray light of other wavelengths. The light purified by the color filter layer 50 continues to propagate upwards, passing through the planarization protective layer 60 and reaching the patterned filter layer 80. Since the filter layer 80 is only disposed above the areas corresponding to the first and second functional units 31, it performs a final filter on any remaining blue light in those areas, while allowing red and green light to pass through. Above the area corresponding to the third functional unit 33, since there is no filter layer 80 covering it, blue light passes directly through the protective layer 60 and the cover plate 70 without any obstruction. Finally, the light passes through the cover plate 70 and exits to the outside of the display panel. The filter layer 80 is disposed between the protective layer 60 and the cover plate 70, serving as the last barrier in the optical path to ensure that even if trace amounts of blue light remain in the red and green pixels after passing through the color filter layer 50, they can still be effectively filtered out. This embodiment achieves another structural layout where the filter layer 80 is disposed above the protective layer 60, providing a final guarantee for blue light filtering and also solving the color crosstalk problem, thereby improving the display effect of the display panel.

[0053] Thirdly, the present invention also provides a display device. Please refer to... Figure 9The display device 300 includes the display panel 200 as described above. The display device can be any device with display function, such as a mobile phone, tablet computer, laptop computer, handheld computer, in-vehicle electronic device, wearable device, ultra-mobile personal computer (UMPC), netbook, or personal digital assistant (PDA), etc. It can also be a non-mobile device such as a personal computer (PC), television (TV), ATM, or self-service machine.

[0054] While the invention has been described herein with reference to specific embodiments, it should be understood that these embodiments are merely examples of the principles and applications of the invention. Therefore, it should be understood that many modifications can be made to the exemplary embodiments, and other arrangements can be designed without departing from the spirit and scope of the invention as defined by the appended claims. It should be understood that different dependent claims and features described herein can be combined in ways different from those described in the original claims. It is also understood that features described in conjunction with individual embodiments can be used in other described embodiments.

Claims

1. A display panel, characterized by, include: substrate; A light-emitting layer is disposed on one side of the substrate; A functional layer is disposed on the side of the light-emitting layer opposite to the substrate, and includes a first functional part, a second functional part, and a third functional part spaced apart along a first direction; the orthographic projections of the first functional part, the second functional part, and the third functional part on the substrate overlap with the orthographic projection of the light-emitting layer on the substrate; A filter layer is disposed on the side of the functional layer opposite to the substrate; The orthographic projection of the filter layer on the substrate at least covers the orthographic projections of the first functional part and the second functional part on the substrate, and the orthographic projection of the filter layer on the substrate does not overlap with the orthographic projection of the third functional part on the substrate.

2. The display panel according to claim 1, characterized in that: In the second direction, the thickness of the filter layer is 1-3 μm, and the material of the filter layer has a transmittance of less than 4% for light in the first wavelength range and a transmittance of more than 90% for light in the second wavelength range; wherein the first direction intersects the second direction; Preferably, the first wavelength range is less than or equal to 460 nm; the second wavelength range is greater than or equal to 500 nm. Preferably, the first wavelength range is 430-460nm; the second wavelength range is 500-730nm.

3. The display panel according to claim 2, characterized in that: The first functional part comprises a first quantum dot material having an emission peak wavelength of 610-730 nm; the second functional part comprises a second quantum dot material having an emission peak wavelength of 500-560 nm; and the third functional part comprises a transparent resin material having a transmittance of greater than 95% for light within the first wavelength range. Preferably, the display panel further includes: A first encapsulation layer is disposed on the side of the functional layer opposite to the substrate; the first encapsulation layer at least covers the first functional part, the second functional part, and the third functional part; A color filter layer is disposed on the side of the first encapsulation layer opposite to the substrate; the color filter layer includes a first color filter, a second color filter, and a third color filter, and in a second direction, the first color filter, the second color filter, and the third color filter correspond to the first functional part, the second functional part, and the third functional part, respectively; A protective layer is disposed on the side of the color filter layer opposite to the substrate; the orthographic projections of the first color filter, the second color filter, and the third color filter on the substrate are all located within the orthographic projection range of the protective layer on the substrate; A cover plate is disposed on the side of the protective layer opposite to the substrate; The second encapsulation layer is disposed on the side of the light-emitting layer opposite to the substrate.

4. The display panel of claim 3, wherein: The filter layer is located on the side of the first encapsulation layer opposite to the substrate; the filter layer covers a portion of the first encapsulation layer; The first color filter and the second color filter are both disposed on the side of the filter layer away from the substrate, and are in contact with the surface of the filter layer away from the substrate, respectively. The third color filter is disposed on the side of the first encapsulation layer away from the substrate, and is in contact with the surface of the first encapsulation layer away from the substrate.

5. The display panel of claim 3, wherein: The filter layer is located on the side of the color filter layer that is away from the substrate; the filter layer covers the first color filter and the second color filter, and the orthographic projection of the filter layer on the substrate does not overlap with the orthographic projection of the third color filter on the substrate; The protective layer is disposed on the side of the filter layer opposite to the substrate, and it at least covers the filter layer and the third color filter.

6. The display panel of claim 3, wherein: The filter layer is located on the side of the protective layer opposite to the substrate; the filter layer covers a portion of the protective layer; The cover plate is disposed on the side of the filter layer opposite to the substrate, and it covers the filter layer and part of the protective layer.

7. A method for manufacturing a display panel, characterized by, include: Provide a substrate; A light-emitting layer is prepared on one side of the substrate; A functional layer is formed on the side of the light-emitting layer opposite to the substrate; the functional layer includes a first functional portion, a second functional portion, and a third functional portion spaced apart along a first direction; the orthographic projections of the first functional portion, the second functional portion, and the third functional portion on the substrate overlap with the orthographic projection of the light-emitting layer on the substrate; A filter layer is prepared on the side of the functional layer opposite to the substrate; The orthographic projection of the filter layer on the substrate at least covers the orthographic projections of the first functional unit and the second functional unit layer on the substrate, and the orthographic projection of the filter layer on the substrate does not overlap with the orthographic projection of the third functional unit on the substrate.

8. The method of manufacturing a display panel according to claim 7, wherein, Also includes: A first encapsulation layer is prepared on the side of the functional layer opposite to the substrate; The first encapsulation layer at least covers the first functional unit, the second functional unit, and the third functional unit; A color filter layer is prepared on the side of the first encapsulation layer opposite to the substrate; The color filter layer includes a first color filter, a second color filter, and a third color filter; in a second direction, the first color filter, the second color filter, and the third color filter correspond to the first functional part, the second functional part, and the third functional part, respectively; wherein, the first direction intersects the second direction; A protective layer is prepared on the side of the color filter layer opposite to the substrate; the orthographic projections of the first color filter, the second color filter, and the third color filter on the substrate are all located within the orthographic projection range of the protective layer on the substrate; A cover plate is prepared on the side of the protective layer opposite to the substrate.

9. The method of manufacturing a display panel according to claim 8, wherein, The step of preparing a filter layer on the side of the functional layer opposite to the substrate includes: A full-surface filter layer is coated on the side of the first encapsulation layer facing away from the substrate; The entire filter layer is patterned to form the filter layer; Preferably, the step of fabricating the filter layer on the side of the functional layer opposite to the substrate includes: A full-surface filter layer is coated on the side of the color filter layer facing away from the substrate; The entire filter layer is patterned, and the filter layer on the side of the third color filter facing away from the substrate is removed; Preferably, the step of fabricating the filter layer on the side of the functional layer opposite to the substrate includes: A full-surface filter layer is coated on the side of the protective layer facing away from the substrate; The entire filter layer is patterned to form the filter layer.

10. A display device, characterized by comprising: A display panel comprising the display panel according to any one of claims 1 to 6, or a display panel manufactured by the manufacturing method of the display panel according to any one of claims 7 to 9.

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