Display panel and display device

Abstract

The application provides a display panel and a display device. The display panel comprises a substrate, a pixel definition layer and a light-emitting functional layer. The pixel definition layer is arranged on one side of the substrate and comprises a plurality of pixel definition units. Each pixel definition unit has one pixel definition opening. The light-emitting functional layer is arranged on the side of the pixel definition layer away from the substrate and comprises a plurality of light-emitting units. The light-emitting units are arranged in the pixel definition openings correspondingly. The pixel definition unit comprises a pixel definition body part and a pixel definition reflection part arranged on the sidewall of the pixel definition body part. The pixel definition reflection part can reflect the emitted light of the light-emitting unit. The display panel provided by the application can improve the color mixing problem and improve the display quality of the display panel.

Description

Technical Field

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

[0002] Organic light-emitting diode (OLED) display panels, compared to liquid crystal displays, have advantages such as being thinner and lighter, having better display effects, higher resolution, wider color gamut, lower power consumption, and the ability to achieve flexible displays, which has led to their rapid development in recent years and widespread market application demand.

[0003] Current OLED display panels can be divided into bottom-emitting OLED panels and top-emitting OLED panels. Regardless of whether it's a bottom-emitting or top-emitting OLED panel, the light-emitting units with display functions are all located within openings in the pixel definition layer. However, the pixel definition layer is generally made of a light-transmitting material, causing light emitted from the light-emitting units to pass through the pixel definition layer after being reflected by electrodes, and then enter adjacent light-emitting units of different colors. This results in color mixing between adjacent light-emitting units, leading to poor display quality, a problem that urgently needs to be solved. Summary of the Invention

[0004] This application provides a display panel and display device that can effectively solve the problem of color mixing between adjacent light-emitting units in existing display panels and improve the display quality of the display panel.

[0005] On one hand, this application provides a display panel, the display panel comprising: a substrate; a pixel definition layer disposed on one side of the substrate and including a plurality of pixel definition units, each pixel definition unit having a pixel definition opening; a light-emitting functional layer disposed on the side of the pixel definition layer opposite to the substrate and including a plurality of light-emitting units, the light-emitting units being correspondingly disposed within the pixel definition opening; wherein, the pixel definition unit includes a pixel definition body portion and a pixel definition reflective portion disposed on the sidewall of the pixel definition body portion, the pixel definition reflective portion being capable of reflecting the emitted light of the light-emitting unit.

[0006] Optionally, the pixel defining body and the pixel defining reflective part are made of the same material and are integrally formed.

[0007] Optionally, the pixel defining body and the pixel defining reflective part are made of polycyclohexyl terephthalate (PTFE).

[0008] Optionally, the display panel further includes: a first electrode layer disposed on the side of the light-emitting functional layer facing the substrate, and the first electrode layer is made of a transparent material; a second electrode layer disposed on the side of the light-emitting functional layer away from the substrate, and the second electrode layer is made of an opaque material; wherein the substrate includes a passivation layer, an optical tunnel layer, and a transparent substrate sequentially stacked in a direction away from the pixel definition layer, wherein the refractive index of the optical tunnel layer is less than the refractive index of the passivation layer, and the refractive index of the optical tunnel layer is less than the refractive index of the transparent substrate.

[0009] Optionally, the optical tunnel layer is disposed on the side of the transparent substrate facing the passivation layer, and the optical tunnel layer is made of a transparent material.

[0010] Optionally, the optical tunnel layer includes multiple optical tunnel units, each optical tunnel unit having an optical tunnel opening, wherein the optical tunnel unit is configured corresponding to the pixel definition unit; and the optical tunnel opening is configured corresponding to the pixel definition opening.

[0011] Optionally, all the light-emitting units have the same light-emitting color, and all the optical tunnel units have the same thickness.

[0012] Optionally, the plurality of light-emitting units include a plurality of first light-emitting units, a plurality of second light-emitting units, and a plurality of third light-emitting units, wherein the wavelengths of the emitted colors of the first light-emitting units, the second light-emitting units, and the third light-emitting units decrease sequentially. The optical tunnel unit corresponding to the first light-emitting unit is a first optical tunnel unit, the thickness of the optical tunnel unit corresponding to the second light-emitting unit is a second optical tunnel unit, and the thickness of the optical tunnel unit corresponding to the third light-emitting unit is a third optical tunnel unit, wherein the thicknesses of the first optical tunnel unit, the second optical tunnel unit, and the third optical tunnel unit decrease sequentially.

[0013] Optionally, the thickness of the optical tunnel unit is less than or equal to 600 nm.

[0014] On the other hand, this application also provides a display device, the display device including a housing and a display panel as described in any of the above claims, wherein the housing has an accommodating space and the display panel is disposed within the accommodating space.

[0015] This application provides a display panel and a display device. The display panel includes a substrate, a pixel definition layer, and a light-emitting functional layer. The pixel definition layer is disposed on one side of the substrate and includes a plurality of pixel definition units, each pixel definition unit having a pixel definition opening. The light-emitting functional layer is disposed on the side of the pixel definition layer opposite to the substrate and includes a plurality of light-emitting units, which are correspondingly disposed within the pixel definition openings. Each pixel definition unit includes a pixel definition body and a pixel definition reflective portion disposed on the sidewall of the pixel definition body, the pixel definition reflective portion being capable of reflecting the light emitted by the light-emitting unit. The display panel provided by this application can improve color mixing problems and enhance the display quality of the display panel. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this application, 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 this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the structure of the display panel provided in Embodiment 1 of this application.

[0018] Figure 2 This is a schematic diagram of the structure of the display panel provided in Embodiment 2 of this application.

[0019] Figure 3 This is a schematic diagram of the structure of the display panel provided in Embodiment 3 of this application.

[0020] Figure 4 This is a schematic diagram of the structure of the display panel provided in Embodiment 4 of this application.

[0021] Explanation of reference numerals in the attached figures:

[0022] Substrate 10; Transparent substrate 11; Passivation layer 12; Optical tunnel layer 13; Optical tunnel unit 131; First optical tunnel unit 131a; Second optical tunnel unit 131b; Third optical tunnel unit 131c; Optical tunnel opening 130; First electrode layer 20; Pixel definition layer 30; Pixel definition unit 31; Pixel definition opening 310; Pixel definition body 311; Pixel definition reflective part 312; Light-emitting functional layer 40; Light-emitting unit 41; First light-emitting unit 41a; Second light-emitting unit 41b; Third light-emitting unit 41c; Second electrode layer 50 Detailed Implementation

[0023] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application. In addition, it should be understood that the specific embodiments described herein are only for illustration and explanation of this application and are not intended to limit this application. In this application, unless otherwise stated, directional terms such as "upper" and "lower" generally refer to the upper and lower positions of the device in actual use or operation, specifically the drawing directions in the accompanying drawings; while "inner" and "outer" refer to the outline of the device.

[0024] The following disclosure provides many different implementations or examples for carrying out different structures of this application. To simplify the disclosure, specific examples of components and arrangements are described below. Of course, these are merely examples and are not intended to limit the scope of this application. Furthermore, reference numerals and / or reference letters may be repeated in different examples; such repetition is for simplification and clarity and does not in itself indicate a relationship between the various implementations and / or arrangements discussed. In addition, various specific examples of processes and materials are provided in this application, but those skilled in the art will recognize the application of other processes and / or the use of other materials. Detailed descriptions are provided below; it should be noted that the order of description of the following embodiments is not intended to limit the preferred order of embodiments.

[0025] Example 1

[0026] Embodiment 1 of this application provides a display panel that can effectively improve the problem of color mixing between adjacent light-emitting units and has excellent display quality.

[0027] Specifically, Figure 1 This is a schematic diagram of the structure of the display panel provided in Embodiment 1 of this application. (Refer to...) Figure 1 As shown, the display panel includes: a substrate 10, a pixel definition layer 30, and a light-emitting functional layer 40. The pixel definition layer 30 is disposed on one side of the substrate 10 and includes a plurality of pixel definition units 31, each pixel definition unit 31 having a pixel definition opening 310. The light-emitting functional layer 40 is disposed on the side of the pixel definition layer 30 away from the substrate 10 and includes a plurality of light-emitting units 41, which are correspondingly disposed within the pixel definition openings 310. The pixel definition unit 31 includes a pixel definition body portion 311 and a pixel definition reflective portion 312 disposed on the sidewall of the pixel definition body portion 311, the pixel definition reflective portion 312 being capable of reflecting the emitted light from the light-emitting unit 41.

[0028] In the display panel provided in this application, since the pixel definition unit 31 includes a pixel definition body 311 and a pixel definition reflective part 312 disposed on the side wall of the pixel definition body 311, the pixel definition reflective part 312 can reflect the emitted light of the light-emitting unit 41, thereby effectively blocking the emitted light of the light-emitting unit 41 from entering the adjacent light-emitting unit 41, thereby effectively improving the problem of color mixing between adjacent light-emitting units 41 and improving the display quality of the display panel.

[0029] In some embodiments of this application, the pixel definition body portion 311 and the pixel definition reflective portion 312 are made of the same material and are integrally formed.

[0030] In the display panel provided in this application, the pixel definition body 311 and the pixel definition reflective part 312 are made of the same material and are integrally formed. That is, the pixel definition body 311 and the pixel definition reflective part 312 can be manufactured in one step during the manufacturing process, thereby greatly reducing the manufacturing cost of the display panel.

[0031] Furthermore, the pixel defining body portion 311 and the pixel defining reflective portion 312 are made of polycyclohexyl terephthalate-dimethyl terephthalate.

[0032] Specifically, polycyclohexylene dimethyl terephthalate (PPD) is a material with high reflectivity, reaching over 95%, and is relatively inexpensive. By selecting PPD as the material for forming the pixel-defining body 311 and the pixel-defining reflective part 312, this application can reduce manufacturing costs while maintaining the reflective performance of the pixel-defining body 311 and the pixel-defining reflective part 312.

[0033] In some embodiments of this application, the display panel further includes a first electrode layer 20 and a second electrode layer 50, wherein the first electrode layer 20 is disposed on the side of the light-emitting functional layer 40 facing the substrate 10, and the second electrode layer 50 is disposed on the side of the light-emitting functional layer 40 away from the substrate 10. Wherein, the first electrode layer 20 is made of a transparent material, and the second electrode layer 50 is made of an opaque material; in this case, the display panel is a bottom-emitting display panel.

[0034] Of course, this application does not limit the light emission form of the display panel. In other embodiments of this application, the first electrode layer 20 is made of an opaque material and the second electrode layer 50 is made of a transparent material. In this case, the display panel is a top-emitting display panel.

[0035] Optionally, the display panel is an OLED display panel, and the light-emitting functional layer 40 of the OLED display panel can be prepared by vapor deposition or inkjet printing; the light-emitting unit 41 in the light-emitting functional layer 40 can be a side-by-side (SBS) or tandem architecture.

[0036] On the other hand, Embodiment 1 of this application also provides a display device, the display device including a housing and a display panel as described in any of the above claims, wherein the housing has an accommodating space and the display panel is disposed within the accommodating space.

[0037] Example 2

[0038] Figure 2 This is a schematic diagram of the structure of the display panel provided in Embodiment 2 of this application. (Refer to...) Figure 2 As shown, the display panel provided in Embodiment 2 of this application includes: a substrate 10, a pixel definition layer 30, and a light-emitting functional layer 40. The pixel definition layer 30 is disposed on one side of the substrate 10 and includes a plurality of pixel definition units 31, each pixel definition unit 31 having a pixel definition opening 310. The light-emitting functional layer 40 is disposed on the side of the pixel definition layer 30 away from the substrate 10 and includes a plurality of light-emitting units 41, which are correspondingly disposed within the pixel definition openings 310. The pixel definition unit 31 includes a pixel definition body portion 311 and a pixel definition reflective portion 312 disposed on the sidewall of the pixel definition body portion 311. The pixel definition reflective portion 312 is capable of reflecting the emitted light from the light-emitting unit 41.

[0039] It should be noted that the structure of the display panel provided in Embodiment 2 of this application is similar to the structure of the display panel provided in Embodiment 1 of this application, and the same parts will not be described again in Embodiment 2 of this application.

[0040] The inventors of this application discovered in their research that in the bottom-emitting display panel of the related technology, the light emitted from the light-emitting unit will generate total internal reflection light under the reflection of the transparent substrate in the substrate. The total internal reflection light will pass through the transparent passivation layer and enter the adjacent light-emitting unit, thereby causing color mixing problems. On the other hand, since the total internal reflection light cannot be emitted from the display panel, it will also lead to a reduction in the light emission efficiency of the display panel.

[0041] To improve the above problems, Embodiment 2 of this application provides a display panel, wherein the display panel is a bottom-emitting display panel.

[0042] Specifically, the display panel further includes: a first electrode layer 20, which is disposed on the side of the light-emitting functional layer 40 facing the substrate 10 and is made of transparent material; and a second electrode layer 50, which is disposed on the side of the light-emitting functional layer 40 away from the substrate 10 and is made of opaque material; wherein, the substrate 10 includes a passivation layer 12, an optical tunnel layer 13, and a transparent substrate 11 sequentially stacked in a direction away from the pixel definition layer 30, wherein the refractive index of the optical tunnel layer 13 is less than the refractive index of the passivation layer 12 and the refractive index of the optical tunnel layer 13 is less than the refractive index of the transparent substrate 11.

[0043] The optical tunneling effect refers to the phenomenon where, when the refractive index of other layers on both sides of a certain film layer is less than that of the film layer, a beam of total internal reflection will cause an instantaneous decay field to be generated on the other side of the interface. The intensity of this field is exponentially related to the distance from the interface, so that the outgoing light will not undergo total internal reflection, but will pass directly through the interface.

[0044] In the display panel provided in this application, since the refractive index of the optical tunnel layer 13 is less than that of the passivation layer 12, and the refractive index of the optical tunnel layer 13 is less than that of the transparent substrate 11, the passivation layer 12, the optical tunnel layer 13, and the transparent substrate 11 can form an optical tunnel effect, thereby reducing total internal reflection light and enabling the emitted light from the light-emitting unit 41 to be emitted from the display panel with higher light emission efficiency, thereby improving the color mixing problem and increasing the light emission efficiency of the display panel.

[0045] In some embodiments of this application, the optical tunnel layer 13 is disposed on the side of the transparent substrate 11 facing the passivation layer 12, and the optical tunnel layer 13 is made of a transparent material.

[0046] In the display panel provided in this application, since the optical tunnel layer 13 is made of a transparent material, when the entire surface of the optical tunnel layer 13 is disposed on the side of the transparent substrate 11 facing the passivation layer 12, the optical tunnel layer 13 will not block the emitted light from the light-emitting unit 41. Furthermore, since the optical tunnel layer 13 is disposed across the entire surface, the manufacturing difficulty of setting the optical tunnel layer 13 can be reduced, the number of process steps can be decreased, and the production cost of the display panel can be lowered.

[0047] Optionally, the passivation layer 12 is made of silicon nitride, the optical tunnel layer 13 is made of MgF2, and the refractive index of the passivation layer 12 is greater than the refractive index of the transparent substrate 11. For example, the refractive indices of the passivation layer 12, the optical tunnel layer 13, and the transparent substrate 11 are 1.8, 1.34, and 1.5, respectively.

[0048] On the other hand, Embodiment 2 of this application also provides a display device, the display device including a housing and a display panel as described in any of the above claims, wherein the housing has an accommodating space and the display panel is disposed within the accommodating space.

[0049] Example 3

[0050] Figure 3 This is a schematic diagram of the structure of the display panel provided in Embodiment 3 of this application. (Refer to...) Figure 3 As shown, the display panel provided in Embodiment 3 of this application includes: a substrate 10, a pixel definition layer 30, and a light-emitting functional layer 40. The pixel definition layer 30 is disposed on one side of the substrate 10 and includes a plurality of pixel definition units 31, each pixel definition unit 31 having a pixel definition opening 310. The light-emitting functional layer 40 is disposed on the side of the pixel definition layer 30 away from the substrate 10 and includes a plurality of light-emitting units 41, which are correspondingly disposed within the pixel definition openings 310. The pixel definition unit 31 includes a pixel definition body portion 311 and a pixel definition reflective portion 312 disposed on the sidewall of the pixel definition body portion 311. The pixel definition reflective portion 312 is capable of reflecting the emitted light from the light-emitting unit 41.

[0051] It should be noted that the structure of the display panel provided in Embodiment 3 of this application is similar to the structure of the display panel provided in Embodiment 2 of this application, and the same parts will not be described again in Embodiment 3 of this application.

[0052] In the display panel provided in Embodiment 3 of this application, the optical tunnel layer 13 includes a plurality of optical tunnel units 131, each optical tunnel unit 131 having an optical tunnel opening 130, wherein the optical tunnel unit 131 is correspondingly disposed with the pixel definition unit 31; and the optical tunnel opening 130 is correspondingly disposed with the pixel definition opening 310.

[0053] Specifically, although the optical tunnel layer 13 is made of transparent material, its light transmittance is still difficult to reach 100%. That is, the optical tunnel layer 13, which overlaps with the light-emitting unit 41, will inevitably cause a certain amount of light extraction efficiency loss. However, since the optical tunnel opening 130 in the optical tunnel unit 131 is correspondingly set with the pixel definition opening 310, the orthographic projection of the optical tunnel unit 131 on the light-emitting functional layer 40 does not overlap with the light-emitting unit 41. This can further improve the light extraction efficiency of the display panel while reducing total internal reflection.

[0054] In some embodiments of this application, the light-emitting units 41 emit the same color, and the optical tunnel units 131 have the same thickness.

[0055] Specifically, when the wavelength of the emitted light from the optical tunnel layer 13 is comparable to that from the light-emitting unit 41, the intensity of the optical tunneling effect is stronger. This application achieves a stronger optical tunneling effect for each optical tunnel unit 131 with the same thickness by setting the emitted color of each light-emitting unit 41 in the display panel to be the same, thereby improving the light extraction efficiency of the display panel and mitigating color mixing issues.

[0056] Meanwhile, since all the optical tunnel units 131 have the same thickness, each optical tunnel unit 131 can be formed using a single film deposition process, thereby simplifying the manufacturing process of the display panel and reducing the production cost of the display panel.

[0057] Furthermore, the light-emitting unit 41 in the light-emitting functional layer 40 has a Tandem architecture, the display panel is a white OLED display panel, and the display panel also includes, for example, a color filter layer to achieve full color.

[0058] In some embodiments of this application, the thickness of the optical tunnel unit 131 is less than or equal to 600 nm.

[0059] Specifically, when the thickness of the optical tunnel unit 131 is less than or equal to 600 nm, the efficiency of the optical tunneling effect is greater than 90%, thereby further improving the performance of the optical tunnel unit 131 and improving the display quality of the display panel.

[0060] On the other hand, Embodiment 3 of this application also provides a display device, the display device including a housing and a display panel as described in any of the above claims, wherein the housing has an accommodating space and the display panel is disposed within the accommodating space.

[0061] Example 4

[0062] Figure 4 This is a schematic diagram of the structure of the display panel provided in Embodiment 4 of this application. (Refer to...) Figure 4As shown, the display panel provided in Embodiment 4 of this application includes: a substrate 10, a pixel definition layer 30, and a light-emitting functional layer 40. The pixel definition layer 30 is disposed on one side of the substrate 10 and includes a plurality of pixel definition units 31, each pixel definition unit 31 having a pixel definition opening 310. The light-emitting functional layer 40 is disposed on the side of the pixel definition layer 30 away from the substrate 10 and includes a plurality of light-emitting units 41, which are correspondingly disposed within the pixel definition openings 310. The pixel definition unit 31 includes a pixel definition body portion 311 and a pixel definition reflective portion 312 disposed on the sidewall of the pixel definition body portion 311. The pixel definition reflective portion 312 is capable of reflecting the emitted light from the light-emitting unit 41.

[0063] It should be noted that the structure of the display panel provided in Embodiment 4 of this application is similar to the structure of the display panel provided in Embodiment 3 of this application, and the same parts will not be described again in Embodiment 4 of this application.

[0064] In the display panel provided in Embodiment 4 of this application, the plurality of light-emitting units 41 include a plurality of first light-emitting units 41a, a plurality of second light-emitting units 41b, and a plurality of third light-emitting units 41c. The wavelengths of the light emitted by the first light-emitting units 41a, the second light-emitting units 41b, and the third light-emitting units 41c decrease sequentially. The optical tunnel unit 131 corresponding to the first light-emitting unit 41a is the first optical tunnel unit 131a, the thickness of the optical tunnel unit 131 corresponding to the second light-emitting unit 41b is the second optical tunnel unit 131b, and the thickness of the optical tunnel unit 131 corresponding to the third light-emitting unit 41c is the third optical tunnel unit 131c. The thicknesses of the first optical tunnel unit 131a, the second optical tunnel unit 131b, and the third optical tunnel unit 131c decrease sequentially.

[0065] Specifically, this application reduces the thickness of the first optical tunnel unit 131a, the second optical tunnel unit 131b, and the third optical tunnel unit 131c sequentially, thereby enabling the first optical tunnel unit 131a, the second optical tunnel unit 131b, and the third optical tunnel unit 131c to be adapted to the emission wavelengths of the first light-emitting unit 41a, the second light-emitting unit 41b, and the third light-emitting unit 41c of different emission colors, thereby improving the energy efficiency of each optical tunnel unit 131.

[0066] Furthermore, the light-emitting unit 41 in the light-emitting functional layer 40 has an SBS architecture, and the light-emitting colors of the first light-emitting unit 41a, the second light-emitting unit 41b, and the third light-emitting unit 41c are red, green, and blue, respectively.

[0067] On the other hand, Embodiment 4 of this application also provides a display device, the display device including a housing and a display panel as described in any of the above claims, wherein the housing has an accommodating space and the display panel is disposed within the accommodating space.

[0068] In summary, this application provides a display panel and a display device. The display panel includes a substrate, a pixel definition layer, and a light-emitting functional layer. The pixel definition layer is disposed on one side of the substrate and includes a plurality of pixel definition units, each pixel definition unit having a pixel definition opening. The light-emitting functional layer is disposed on the side of the pixel definition layer opposite to the substrate and includes a plurality of light-emitting units, which are correspondingly disposed within the pixel definition openings. Each pixel definition unit includes a pixel definition body and a pixel definition reflective portion disposed on the sidewall of the pixel definition body, the pixel definition reflective portion being capable of reflecting the light emitted by the light-emitting unit. The display panel provided by this application can improve color mixing problems and enhance the display quality of the display panel.

[0069] The above provides a detailed description of a display panel and display device provided in the embodiments of this application. Specific examples have been used to illustrate the principles and implementation methods of this application. The description of the above embodiments is only for the purpose of helping to understand the method and core ideas of this application. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this application. Therefore, the content of this specification should not be construed as a limitation of this application.

Claims

1. A display panel, characterized in that, The display panel includes: Substrate; A pixel definition layer is disposed on one side of the substrate and includes a plurality of pixel definition units, each pixel definition unit having a pixel definition opening; A light-emitting functional layer is disposed on the side of the pixel definition layer opposite to the substrate, and includes a plurality of light-emitting units, wherein the light-emitting units are correspondingly disposed within the pixel definition opening; The pixel definition unit includes a pixel definition body and a pixel definition reflective part disposed on the side wall of the pixel definition body. The pixel definition reflective part is capable of reflecting the emitted light from the light-emitting unit. The substrate includes a passivation layer, an optical tunnel layer, and a transparent substrate that are sequentially stacked in a direction away from the pixel definition layer; The optical tunnel layer includes multiple optical tunnel units, each optical tunnel unit having an optical tunnel opening, wherein the optical tunnel unit is correspondingly configured with respect to the pixel definition unit; and the optical tunnel opening is correspondingly configured with respect to the pixel definition opening. The orthographic projection of the optical tunnel unit onto the light-emitting functional layer does not overlap with the light-emitting unit; The plurality of light-emitting units include a plurality of first light-emitting units, a plurality of second light-emitting units, and a plurality of third light-emitting units. The wavelengths of the light emitted by the first light-emitting units, the second light-emitting units, and the third light-emitting units decrease sequentially. The optical tunnel unit corresponding to the first light-emitting unit is a first optical tunnel unit, the optical tunnel unit corresponding to the second light-emitting unit is a second optical tunnel unit, and the optical tunnel unit corresponding to the third light-emitting unit is a third optical tunnel unit. The thicknesses of the first optical tunnel unit, the second optical tunnel unit, and the third optical tunnel unit decrease sequentially.

2. The display panel according to claim 1, characterized in that, The pixel-defining body and the pixel-defining reflective part are made of the same material and are integrally formed.

3. The display panel according to claim 2, characterized in that, The pixel defining body and the pixel defining reflective part are made of polycyclohexyl terephthalate-dimethyl terephthalate.

4. The display panel according to claim 1, characterized in that, The display panel further includes: a first electrode layer disposed on the side of the light-emitting functional layer facing the substrate, and the first electrode layer is made of a transparent material; a second electrode layer disposed on the side of the light-emitting functional layer away from the substrate, and the second electrode layer is made of an opaque material; wherein, the substrate includes a passivation layer, an optical tunnel layer, and a transparent substrate sequentially stacked in a direction away from the pixel definition layer, wherein the refractive index of the optical tunnel layer is less than the refractive index of the passivation layer, and the refractive index of the optical tunnel layer is less than the refractive index of the transparent substrate.

5. The display panel according to claim 4, characterized in that, The optical tunnel layer is disposed on the side of the transparent substrate facing the passivation layer, and the optical tunnel layer is made of a transparent material.

6. The display panel according to claim 1, characterized in that, When the light-emitting units have the same light-emitting color, the optical tunnel units have the same thickness.

7. The display panel according to claim 6, characterized in that, The thickness of the optical tunneling unit is less than or equal to 600 nm.

8. A display device, characterized in that, The device includes a housing and a display panel as described in any one of claims 1-7, wherein the housing has an accommodating space and the display panel is disposed within the accommodating space.

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