Color conversion structure, display panel and display device

Abstract

The application discloses a color conversion structure, a display panel and a display device. The color conversion structure comprises a light blocking layer, a color conversion unit and a filter layer. The light blocking layer has a plurality of through holes arranged in an array. The color conversion unit is located in part of the through holes, and the color conversion layer can convert incident light of a first wavelength range into light of a second wavelength range. The filter layer is arranged on one side of the light blocking layer. The filter layer comprises a first filter part. The first filter part has a plurality of through holes arranged in an array. The projection of the light blocking layer on the filter layer at least overlaps the first filter part. The first filter part can reflect light of the first wavelength range incident from the side of the filter layer away from the light blocking layer. The projection of the color conversion unit on the filter layer at least partially falls into the through holes. The color conversion structure, the display panel and the display device provided by the application can reduce or avoid display abnormalities under a large viewing angle to a certain extent.

Description

Technical Field

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

[0002] In related technologies, quantum dots (QDs) can be combined with organic light-emitting display technology (OLED) to obtain QD-OLED display devices. The principle is to use the light emitted by the OLED device as backlight, and then convert the backlight through quantum dots to achieve full color.

[0003] In QD-OLED displays, OLED devices emit backlight of a specific color. A portion of this backlight is emitted directly outwards, while the remaining portion is used to excite quantum dots to emit different colors of light. Of the light emitted by the OLED devices and quantum dots, only the light emitted towards the outside of the display device is visible to the user; light emitted in other directions is dissipated within the display device. Because the backlight is emitted directly from the OLED devices, its propagation within the display device exhibits a strong microcavity effect. Consequently, the brightness of the backlight emitted directly from the display device decays rapidly at wide viewing angles, leading to display abnormalities at these angles. Summary of the Invention

[0004] This application provides a color conversion structure, a display panel, and a display device, with the aim of improving the light brightness of some colors in the color conversion structure at a wide viewing angle.

[0005] An embodiment of the first aspect of this application provides a color conversion structure, the color conversion structure including:

[0006] A light-blocking layer with multiple through holes arranged in an array;

[0007] The color conversion unit is located inside a portion of the through-hole, and the color conversion layer is capable of converting incident light in the first wavelength range into light in the second wavelength range for emission.

[0008] A filter layer is disposed on one side of a light blocking layer. The filter layer includes a first filter portion, which has a plurality of through holes arranged in an array. The projection of the light blocking layer on the filter layer at least overlaps with the first filter portion. The first filter portion is capable of reflecting light of a first wavelength range that enters from the side of the filter layer away from the light blocking layer. The projection of the color conversion unit on the filter layer at least partially falls into the through holes. The second wavelength range is other wavelengths besides the first wavelength range.

[0009] According to an embodiment of the first aspect of this application, the color conversion structure further includes an anti-reflection layer, which is disposed on the side of the filter layer away from the light blocking layer, and the refractive index of the anti-reflection layer is less than the refractive index of the filter layer.

[0010] The thickness h of the antireflective layer satisfies:

[0011] Where n is a positive integer, λ1 is the first wavelength range, and n1 is the refractive index of the antireflection layer.

[0012] According to any of the foregoing embodiments of the first aspect of this application, the first wavelength range is 440–480 nm;

[0013] According to any of the foregoing embodiments of the first aspect of this application, the refractive index of the antireflective layer is 1.3 to 1.5.

[0014] According to any of the foregoing embodiments of the first aspect of this application, the filter layer further includes a second filter portion disposed within a through hole, the projection of the color conversion unit on the filter layer at least overlaps with the second filter portion, and the second filter portion is capable of transmitting light in a second wavelength range.

[0015] According to any of the foregoing embodiments of the first aspect of this application, the plurality of color conversion units include a plurality of red quantum dot units and a plurality of green quantum dot units, the red quantum dot units and the green quantum dot units are respectively housed in a through hole, the red quantum dot units can emit red light when excited by blue light, and the green quantum dot units can emit green light when excited by blue light.

[0016] According to any of the foregoing embodiments of the first aspect of this application, the second filter portion includes a red filter portion and a green filter portion. The projection of the red quantum dot unit on the filter layer overlaps with the red filter portion, and the red filter portion is capable of transmitting red light emitted by the red quantum dot unit. The projection of the green quantum dot unit on the filter layer overlaps with the green filter portion, and the green filter portion is capable of transmitting green light emitted by the green quantum dot unit.

[0017] According to any of the foregoing embodiments of the first aspect of this application, the second filter portion extends into the through hole.

[0018] According to any of the foregoing embodiments of the first aspect of this application, the color conversion structure further includes a plurality of transmission units, the transmission units being disposed in through holes that do not house the color conversion units, and the projection of the transmission units on the filter layer overlapping with the first filter portion.

[0019] The second aspect of this application also provides a display device, including a substrate, a light-emitting device layer, and a display panel provided in any of the first aspects of the above-described embodiments, wherein the light-emitting device layer is disposed on one side of the substrate, and the color conversion structure is disposed on the side of the light-emitting device layer away from the substrate.

[0020] According to any of the foregoing embodiments of the first aspect of this application, the light-emitting device layer is capable of emitting light within a first wavelength range.

[0021] An embodiment of the third aspect of this application also provides a display device, including the display panel provided in any of the embodiments of the second aspect described above.

[0022] In the color conversion structure, display panel, and display device provided in this application embodiment, by placing the color conversion unit inside the through hole of the light blocking layer, the light blocking layer can block part of the light emitted from the color conversion unit, thereby reducing or avoiding the light mixing phenomenon of light emitted from adjacent color conversion units; by setting a filter layer on one side of the light blocking layer, and setting the projection of the light blocking layer on the filter layer to at least overlap with the first filter part, the first filter part can reflect the light of the first wavelength range incident from the side of the filter layer away from the light blocking layer, so that the light of the first wavelength range incident from the side of the filter layer away from the light blocking layer into the color conversion structure can be reflected by the first filter part, thereby compensating for the light of the first wavelength range emitted through the through hole, so as to reduce or avoid the insufficient light of the first wavelength range emitted through the through hole at a large viewing angle due to the microcavity effect of the incident light of the first wavelength range incident from the side of the light blocking layer away from the filter layer, thus ensuring the brightness of the light of the first wavelength range of the color conversion structure at a large viewing angle. Attached Figure Description

[0023] Other features, objects, and advantages of this application will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings, in which the same or similar reference numerals denote the same or similar features, and the drawings are not drawn to scale.

[0024] Figure 1 This is a cross-sectional structural diagram of a color conversion structure provided in the first aspect embodiment of this application;

[0025] Figure 2 This is a schematic diagram of the optical path principle of a color conversion structure provided in the first aspect embodiment of this application;

[0026] Figure 3 This is a cross-sectional structural diagram of another color conversion structure provided in the first aspect embodiment of this application;

[0027] Figure 4 This is a schematic diagram of the optical path principle of an antireflection layer provided in the first aspect embodiment of this application;

[0028] Figure 5 This is a cross-sectional structural diagram of another color conversion structure provided in the first aspect embodiment of this application;

[0029] Figure 6 This is a cross-sectional structural schematic diagram of a display panel provided in the first aspect embodiment of this application;

[0030] Figure 7This is a schematic diagram of a part of the manufacturing process of a display panel provided in the first aspect of this application.

[0031] Explanation of reference numerals in the attached figures:

[0032] 10. Color conversion structure; 1. Light blocking layer; 11. Through hole; 2. Color conversion unit; 21. Red quantum dot unit; 22. Green quantum dot unit; 3. Filter layer; 31. First filter section; 32. Through hole; 33. Second filter section; 331. Red filter section; 332. Green filter section; 4. Anti-reflective layer; 5. Transmission unit;

[0033] 20. Substrate; 30. Light-emitting device layer; 40. Encapsulation layer. Detailed Implementation

[0034] The features and exemplary embodiments of various aspects of this application will now be described in detail. To make the objectives, technical solutions, and advantages of this application clearer, the application will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only configured to explain this application and are not configured to limit this application. For those skilled in the art, this application can be implemented without some of these specific details. The following description of the embodiments is merely to provide a better understanding of this application by illustrating examples of this application.

[0035] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising..." does not exclude the presence of additional identical elements in the process, method, article, or apparatus that includes the element.

[0036] It should be understood that when describing the structure of a component, when referring to a layer or region as being "above" or "on top of" another layer or region, it can mean that it is directly above the other layer or region, or that it contains other layers or regions between it and the other layer or region. Furthermore, if the component is flipped over, that layer or region will be located "below" or "under" the other layer or region.

[0037] In related technologies, quantum dots (QDs) can be combined with organic light-emitting display technology (OLED) to obtain QD-OLED display devices. The principle is to use the light emitted by the OLED device as backlight, and then convert the backlight through quantum dots to achieve full color.

[0038] In QD-OLED displays, OLED devices emit backlight of a specific color. A portion of this backlight is emitted directly outwards, while the remainder is used to excite quantum dots to emit different colors of light. Of the light emitted by the OLED devices and quantum dots, only the light emitted towards the outside of the display device is visible to the user; light emitted in other directions is dissipated within the display device. Because the backlight is emitted directly from the OLED devices, its propagation within the display device exhibits a strong microcavity effect. Consequently, the brightness of the backlight emitted directly from the display device decays rapidly at wide viewing angles, leading to display abnormalities at these angles. For example, when an OLED device emits blue backlight, a portion is emitted directly outwards, while another portion is used to excite quantum dots to emit different colors of light. The light generated by the quantum dots can be emitted in multiple directions, allowing users to view the quantum dot-excited light from both wide and normal viewing angles. Because the blue backlight is emitted directly outwards, the brightness of the blue light seen by users at wide viewing angles is lower than that seen when viewed directly. Furthermore, due to the strong microcavity effect in OLED devices, the blue light emitted by the OLED device is enhanced at a direct viewing angle but decays more rapidly at wide viewing angles. The weaker blue light brightness at wide viewing angles will cause the display to appear reddish.

[0039] Existing solutions cannot adequately address the technical problems. To resolve these issues, this application provides a color conversion structure, a display panel, and a display device. The following description, in conjunction with the accompanying drawings, will illustrate various embodiments of the color conversion structure, display panel, and display device.

[0040] See Figure 1 This application provides a color conversion structure 10, which includes a light blocking layer 1, a color conversion unit 2, and a filter layer 3. The light blocking layer 1 has a plurality of through holes 11 arranged in an array. The color conversion unit 2 is located within a portion of the through holes 11, and the color conversion layer can convert incident light in a first wavelength range into light in a second wavelength range. The filter layer 3 is disposed on one side of the light blocking layer 1 and includes a first filter portion 31. The first filter portion 31 has a plurality of through holes 32 arranged in an array. The projection of the light blocking layer 1 onto the filter layer 3 overlaps at least with the first filter portion 31. The first filter portion 31 can reflect light in the first wavelength range incident from the side of the filter layer 3 away from the light blocking layer 1. The projection of the color conversion unit 2 onto the filter layer 3 at least partially falls into the through holes 32. The second wavelength range is other wavelengths besides the first wavelength range.

[0041] The color conversion structure 10 can be applied to a display panel. The display panel can select an organic light-emitting diode (OLED) or a light-emitting diode (LED) as a light source. The light source emits light in a first wavelength range as incident light to the color conversion unit 2. The color conversion unit 2 is excited by the incident light and emits light in a second wavelength range to achieve image display with multiple colors.

[0042] Multiple color conversion units 2 can be configured to emit different colors upon specific excitation, such as red conversion units and green conversion units. The red conversion unit emits red light upon excitation by incident light, and the green conversion unit emits green light upon excitation by incident light. The color conversion unit 2 can be made of quantum dot materials, including but not limited to quantum dot materials with a shell of zinc sulfide (ZnS) and a core of cadmium selenide (CdSe), cadmium telluride (CdTe), cadmium sulfide (CdS), indium phosphide (InP), or perovskite. The quantum dot material can also include a scatterer, such as titanium dioxide or silicon dioxide.

[0043] The aforementioned light-blocking layer 1 can be in the form of a mesh, and the color conversion unit 2 can be set inside the through holes 11 of the light-blocking layer 1 through a printing process. The light-blocking layer 1 can be made of an opaque material, so that the light emitted by the light source and the light emitted by the color conversion unit 2 cannot pass through the light-blocking layer 1, thereby avoiding light mixing phenomenon of the light emitted from each through hole 11. In order to improve the blocking effect of the light-blocking layer 1 on the light emitted by each color conversion unit 2, the thickness of the light-blocking layer 1 can be greater than or equal to the thickness of the color conversion unit 2.

[0044] Please refer to the following: Figure 2 The light source can have a light-blocking layer 1 on the side opposite to the filter layer 3. A portion of the light a1 emitted by the light source in the first wavelength range enters the color conversion unit 2 and is converted into light b in the second wavelength range before exiting. A portion of the light a1 emitted by the light source in the first wavelength range can be directly emitted through the through hole 11. Due to the microcavity effect, this portion of light a1 attenuates relatively quickly at a wide viewing angle. In this application, the filter layer 3 can transmit or reflect light in a preset wavelength range. The projection of the light-blocking layer 1 onto the filter layer 3 overlaps at least with the first filter part 31, so that the light a2 in the first wavelength range that enters the color conversion structure 10 from the filter layer 3 can be reflected by the first filter part 31, thereby compensating for the light a1 in the first wavelength range emitted from the color conversion structure 10. For example, Figure 2The dashed arrows indicate the optical path, and the light rays a1 in the first wavelength range and b in the second wavelength range emitted through the through-hole 11 can be emitted through the through-hole 32 of the filter layer 3, for example... Figure 2 The optical path is indicated by the solid arrow.

[0045] In the display panel provided in this application, by placing the color conversion unit 2 inside the through hole 11 of the light blocking layer 1, the light blocking layer 1 can block part of the light emitted from the color conversion unit 2, thereby reducing or avoiding the light mixing phenomenon of light emitted from adjacent color conversion units 2; by setting a filter layer 3 on one side of the light blocking layer 1, and setting the projection of the light blocking layer 1 on the filter layer 3 to overlap with the first filter part 31, the first filter part 31 can reflect the light of the first wavelength range that enters from the side of the filter layer 3 away from the light blocking layer 1, so that the light of the first wavelength range that enters the color conversion structure 10 from the side of the filter layer 3 away from the light blocking layer 1 can be reflected by the first filter part 31, thereby compensating for the light of the first wavelength range emitted through the through hole 11, so as to reduce or avoid the microcavity effect caused by the incident light of the first wavelength range that enters from the side of the light blocking layer 1 away from the filter layer 3, resulting in insufficient light of the first wavelength range emitted through the through hole 11 at a large viewing angle, thus ensuring the brightness of the light of the first wavelength range of the color conversion structure 10 at a large viewing angle.

[0046] Please see Figure 3 In one embodiment, the color conversion structure 10 further includes an anti-reflection layer 4, which is disposed on the side of the filter layer 3 away from the light-blocking layer 1. The refractive index of the anti-reflection layer 4 is less than that of the filter layer 3. Optionally, the thickness h of the anti-reflection layer 4 satisfies:

[0047] Where n is a positive integer, λ1 is the first wavelength range, and n1 is the refractive index of the antireflection layer 4.

[0048] Please refer to the following: Figure 4As those skilled in the art will understand, light travels faster in a medium with a lower refractive index, and such a medium is called an optically less dense medium. Conversely, light travels slower in a medium with a higher refractive index, and such a medium is called an optically denser medium. When light strikes the interface between two transparent media, if the light travels from the optically denser medium to the optically less dense medium, total internal reflection may occur. If the light travels from the optically less dense medium to the optically denser medium, the reflected light experiences a half-wavelength loss. For example, ambient light enters the antireflection layer 4 from the air medium, and then enters the filter layer 3 from the antireflection layer 4. When the thickness h of the antireflection layer 4 satisfies the aforementioned formula, light in the first wavelength range from the ambient environment is either grazing or perpendicularly incident into the antireflection layer 4, and the path length L1 of the light in the antireflection layer 4 is n1*h. Since the reflected light from both surfaces of the antireflection layer 4 experiences a half-wavelength loss, the light in the first wavelength range reflected back from both sides of the antireflection layer 4 will interfere with each other, thus canceling each other out and reducing the amount of light in the first wavelength range reflected by the antireflection layer 4 that the user can see at a smaller viewing angle.

[0049] When the thickness h of the antireflection layer 4 satisfies the aforementioned formula, light in the first wavelength range from the external environment enters the antireflection layer 4 at a large angle θ. The path L2 of the light in the antireflection layer 4 is (n1*h) / cosθ, and (n1*h) / cosθ≠(2n-1)λ1 / 4. The light in the first wavelength range reflected from both sides of the antireflection layer 4 does not interfere with each other, so that the user can see the light in the first wavelength range reflected by the antireflection layer 4 at a wide viewing angle. The light in the first wavelength range reflected can supplement the insufficient brightness of the light in the first wavelength range emitted from the color conversion structure 10.

[0050] Therefore, the antireflection layer 4 only has an antireflection effect when its refractive index is less than that of the filter layer 3. When the thickness h of the antireflection layer 4 satisfies the aforementioned formula, the antireflection layer 4 has an antireflection and antireflection effect on light in the first wavelength range incident at a smaller angle, but it does not have an antireflection and antireflection effect on light in the first wavelength range incident at a larger angle. Furthermore, the antireflection layer 4 can reflect light in the first wavelength range from the ambient light to compensate for the insufficient brightness of the light in the first wavelength range emitted from the color conversion structure 10.

[0051] In some embodiments, the first wavelength range is 440–480 nm. That is, the light in the first wavelength range is blue light. Since blue has the shortest wavelength among the three primary colors, the energy loss during the excitation of other colors by the light in the first wavelength range entering the color conversion unit 2 can be reduced.

[0052] Since the antireflection layer 4 has a filter layer 3 on one side and air as the medium on the other side, a suitable refractive index material can be selected to fabricate the antireflection layer 4 based on the refractive indices of the filter layer 3 and air. This ensures that the refractive index of the antireflection layer 4 is less than that of the filter layer 3 and greater than that of the air medium. In some embodiments, the refractive index of the antireflection layer 4 is 1.3 to 1.5. Various easily moldable transparent materials can be used to fabricate the antireflection layer 4, such as photoresist with good light transmission and a reasonable price. Therefore, a transparent photoresist with a refractive index of 1.3 to 1.5 can be selected as the fabrication material for the antireflection layer 4.

[0053] The filter layer 3 also includes a second filter part 33, which is disposed in the through hole 32. The projection of the color conversion unit 2 on the filter layer 3 overlaps with the second filter part 33 at least. The second filter part 33 is capable of transmitting light in the second wavelength range.

[0054] The color conversion unit 2 is excited by incident light to generate light in a second wavelength range. This second wavelength range light enters and exits through the second filter 33, while the first wavelength range light not converted by the color conversion unit 2 is blocked by the second filter 33. Furthermore, the second filter 33 can also block some light from entering the color conversion unit 2 from the filter layer 3, thereby reducing the amount of unwanted light emitted by the color conversion unit 2 when excited by light entering from the filter layer 3. By ensuring that the projection of the color conversion unit 2 onto the filter layer 3 at least overlaps with the second filter 33, the simultaneous emission of the first wavelength range light and the second wavelength range light not converted by the color conversion unit 2 from the same through-hole 11 is reduced or prevented to some extent.

[0055] Please see Figure 5 In some embodiments, the multiple color conversion units 2 include multiple red quantum dot units 21 and multiple green quantum dot units 22, which are respectively housed in the through hole 11. The red quantum dot units 21 can emit red light when excited by blue light, and the green quantum dot units 22 can emit green light when excited by blue light.

[0056] The red quantum dot unit 21 can convert incident light within a first wavelength range into red light, and it can also generate red light when excited by blue light. The green quantum dot unit 22 can convert incident light within the first wavelength range into green light, and it can also generate green light when excited by blue light. By setting multiple red quantum dot units 21 and multiple green quantum dot units 22, both red and green light can be obtained from light within the first wavelength range.

[0057] In some embodiments, the second filter section 33 includes a red filter section 331 and a green filter section 332. The projection of the red quantum dot unit 21 on the filter layer 3 overlaps with the red filter section 331, and the red filter section 331 can transmit the red light emitted by the red quantum dot unit 21. The projection of the green quantum dot unit 22 on the filter layer 3 overlaps with the green filter section 332, and the green filter section 332 can transmit the green light emitted by the green quantum dot unit 22.

[0058] In summary, the red filter 331 is configured to correspond to the red quantum dot unit 21. Red light emitted from the red quantum dot unit 21 can pass through the red filter 331, while incident light in the first wavelength range that has not been converted cannot pass through the red filter 331, meaning that unconverted blue light cannot pass through the red filter 331. The green filter 332 is configured to correspond to the green quantum dot unit 22. Green light emitted from the green quantum dot unit 22 can pass through the green filter 332, while incident light in the first wavelength range that has not been converted cannot pass through the green filter 332, meaning that unconverted blue light cannot pass through the green filter 332.

[0059] As can be seen from the foregoing, in this embodiment, the light in the second wavelength range includes at least green light and red light.

[0060] In some embodiments, the second filter portion 33 extends into the through hole 11. Part of the light emitted from the color conversion unit 2 is blocked by the light blocking layer 1, and part of it enters the second filter portion 33, thereby reducing or preventing the light emitted from the color conversion unit 2 from entering the first filter portion 31 to a certain extent.

[0061] In some embodiments, the color conversion structure 10 further includes a plurality of transmission units 5, which are disposed in the through holes 11 that do not house the color conversion units 2, and the projection of the transmission units 5 on the filter layer 3 overlaps with the first filter portion 31.

[0062] Among the multiple through holes 11, a portion houses red quantum dot units 21 to emit red light outward, a portion houses green quantum dot units 22 to emit green light outward, and a portion houses transmission units 5 so that incident light in the first wavelength range can be directly transmitted through the transmission units 5 to emit light in the first wavelength range. This light in the first wavelength range no longer needs to be converted by the color conversion unit 2 to improve the utilization rate of the light source, thereby realizing that the color conversion structure 10 emits light in both the first and second wavelength ranges simultaneously.

[0063] In another embodiment, the first filter portion 31 extends into the through hole 11 that houses the transmission unit 5.

[0064] Since a certain amount of color conversion structures 10 needs to be accommodated within the through-hole 11 to convert the light incident on the color conversion structures 10 into light within the second wavelength range as much as possible, the light blocking layer 1 with the through-hole 11 needs to have a certain thickness so that the through-hole 11 can accommodate a sufficiently thick color conversion structure 10. A thicker light blocking layer 1 would be disadvantageous in fabrication, so the light blocking layer 1 can be fabricated in multiple stages to form multiple stacked layer structures. That is, the light blocking layer 1 can include multiple blocking layers, each of which is stacked along the thickness direction of the color conversion structure 10. In this application, the light blocking layer 1 includes a first blocking layer 11 and a second blocking layer 12. When fabricating the color conversion structure 10, the first blocking layer 11 is fabricated first, and holes are made in the first blocking layer 11 to accommodate the color conversion unit 2 and the transmission unit 5. The second blocking layer 12 is formed on the first blocking layer 11, and holes are made in the second blocking layer 12 to accommodate the second filter 32. Finally, the first filter 31 is provided in the area of ​​the second blocking layer 12 where the second filter 32 is not provided. For ease of fabrication, color conversion unit 2 and transmission unit 5 of the same thickness can be fabricated in the opening of the first barrier layer 11. Openings can be made simultaneously in the areas of the second barrier layer 12 corresponding to the color conversion unit 2 and transmission unit 5. Therefore, the material for fabricating the first filter portion covering the second barrier layer 12 will inevitably flow into the opening of the second barrier layer 12, forming a structure in which the first filter portion 31 extends to the through hole 11 that accommodates the transmission unit 5.

[0065] Please see Figure 6 Secondly, this application also provides a display panel 100, including a substrate 20, a light-emitting device layer 30, and a color conversion structure 10 provided in the first aspect. The light-emitting device layer 30 is disposed on one side of the substrate 20, and the color conversion structure 10 is disposed on the side of the light-emitting device layer 30 away from the substrate 20.

[0066] The substrate 20, the light-emitting device layer 30, and the color conversion structure 10 can be stacked along the thickness direction of the display panel 100. The substrate 20 can be a silicon substrate or a flexible substrate, such as polyimide. The light-emitting device layer 30 can emit light within a first wavelength range. The light-emitting device layer 30 includes multiple light-emitting devices 301 and a driving array. Each light-emitting device 301 can emit light within the first wavelength range. The driving array can be disposed on the side of the light-emitting device 301 closest to the substrate 20, and the driving array provides electrical signals to the light-emitting device 301. Of course, the display panel can also include structures such as an encapsulation layer 40 and a cover plate. The encapsulation layer 40 can be disposed between the light-emitting device layer 30 and the light-blocking layer 1 to prevent external moisture from entering the light-emitting device layer 30. The cover plate can be disposed on the side of the anti-reflection layer away from the substrate to reduce or avoid damage to the anti-reflection layer by external forces.

[0067] Please see Figure 7To further illustrate the display panel 100 provided in this application, the following example illustrates the manufacturing process of the display panel 100.

[0068] like Figure 7 (a) A substrate 20 is provided, a light-emitting device layer 30 is formed on the substrate 20, and an encapsulation layer 40 is formed on the light-emitting device layer 30;

[0069] like Figure 7 (b) A light blocking layer 1 is formed on the encapsulation layer by photolithography, and a through hole 11 is etched at the position of the corresponding light-emitting unit to expose the encapsulation layer;

[0070] like Figure 7 (c) Red quantum dot units 21 and green quantum dot units 22 are printed in multiple through holes 11 by printing process, and transparent organic glue is filled in some through holes 11 to form transmission units 5.

[0071] A red filter portion 331 and a green filter portion 332 are formed on the red quantum dot unit 21 and the green quantum dot unit 22 respectively by photolithography; a blue filter material is coated on the light blocking layer 1 by photolithography, and the blue filter material covering the red filter portion 331 and the green filter portion 332 is etched away to form the first filter portion 31.

[0072] like Figure 7 (d) An anti-reflection layer is formed by coating on the filter layer 3.

[0073] The display panel 100 provided in this application embodiment has the aforementioned color conversion structure 10. The color conversion structure 10 provided in the above embodiments has all the beneficial effects of the aforementioned color conversion structure 10, which will not be repeated here.

[0074] Thirdly, this application also provides a display device. The display device provided in this application has the relevant structure of the aforementioned display panel. Please refer to the display panels provided in the above embodiments. It has all the beneficial effects of the aforementioned display panels, which will not be repeated here.

[0075] The embodiments described above are not exhaustive and do not limit the invention to specific examples. Clearly, many modifications and variations can be made based on the above description. These embodiments are selected and specifically described in this specification to better explain the principles and practical applications of this application, thereby enabling those skilled in the art to effectively utilize this application and its modifications. This application is limited only by the claims and their full scope and equivalents.

Claims

1. A color conversion structure, characterized in that, The color conversion structure includes: A light-blocking layer with multiple through holes arranged in an array; A color conversion unit is located within a portion of the through-hole, and the color conversion unit is capable of converting incident light in a first wavelength range into light in a second wavelength range for emission. A filter layer is disposed on one side of the light blocking layer. The filter layer includes a first filter portion having a plurality of through holes arranged in an array. The projection of the light blocking layer on the filter layer at least overlaps with the first filter portion. The first filter portion is capable of reflecting external light of the first wavelength range that enters from the side of the filter layer away from the light blocking layer. The projection of the color conversion unit on the filter layer at least partially falls into the through holes. The second wavelength range is other wavelengths besides the first wavelength range.

2. The color conversion structure according to claim 1, characterized in that, The color conversion structure further includes an anti-reflection layer, which is disposed on the side of the filter layer away from the light blocking layer, and the refractive index of the anti-reflection layer is less than the refractive index of the filter layer; The thickness h of the antireflective layer satisfies: Where n is a positive integer, Where n is the first wavelength range, and n1 is the refractive index of the antireflection layer.

3. The color conversion structure according to claim 2, characterized in that, The first wavelength range is 440~480nm.

4. The color conversion structure according to claim 2, characterized in that, The refractive index of the antireflective layer is 1.3 to 1.

5.

5. The color conversion structure according to claim 1, characterized in that, The filter layer further includes a second filter portion disposed within the through-hole. The projection of the color conversion unit onto the filter layer overlaps at least with the second filter portion, and the second filter portion is capable of transmitting light within the second wavelength range.

6. The color conversion structure according to claim 5, characterized in that, The plurality of color conversion units include a plurality of red quantum dot units and a plurality of green quantum dot units, wherein the red quantum dot units and the green quantum dot units are respectively housed within the through hole. The red quantum dot units can emit red light when excited by blue light, and the green quantum dot units can emit green light when excited by blue light.

7. The color conversion structure according to claim 6, characterized in that, The second filter section includes a red filter section and a green filter section. The projection of the red quantum dot unit on the filter layer overlaps with the red filter section, and the red filter section can transmit the red light emitted by the red quantum dot unit. The projection of the green quantum dot unit on the filter layer overlaps with the green filter section, and the green filter section can transmit the green light emitted by the green quantum dot unit.

8. The color conversion structure according to claim 5, characterized in that, The second filter extends into the through hole.

9. The color conversion structure according to claim 1, characterized in that, The color conversion structure further includes multiple transmission units, which are disposed in the through holes that do not house the color conversion units. The projection of the transmission units on the filter layer overlaps with the first filter portion.

10. A display panel, characterized in that, include: Substrate; A light-emitting device layer is disposed on one side of the substrate; The color conversion structure as described in any one of claims 1 to 9, wherein the color conversion structure is disposed on the side of the light-emitting device layer away from the substrate.

11. The display panel according to claim 10, characterized in that, The light-emitting device layer is capable of emitting light within the first wavelength range.

12. A display device, characterized in that, include: The display panel as described in any one of claims 10-11.

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