OLED display panel

Abstract

The present invention provides an OLED display panel. The color filter layer in the OLED display panel includes a red color filter layer, a green color filter layer, and a blue color filter layer that are disposed opposite to the light-emitting device layer. Among them, a green antireflection layer is further provided between the light-emitting device layer and the green color filter layer. The green antireflection layer is a fluoride material layer, and the fluoride is one or a combination of lithium fluoride, sodium fluoride, potassium fluoride, magnesium fluoride, and calcium fluoride. Relative to the red color filter layer and the blue color filter layer, the green color filter layer has the highest reflectivity to external light. The green antireflection layer further blocks external light from entering the light-emitting device layer, and the fluoride particles in the antireflection layer can also absorb the reflected visible light, which can greatly reduce the transmittance of external light in the entire wavelength band, thereby achieving the surface optical characteristics of low reflectivity. At the same time, the red, green, and blue color filter layers have different transmittances for different wavelengths, improving the display color gamut and contrast of the picture.

Description

Technical Field

[0001] The present invention relates to the field of display technologies, and more particularly, to an OLED display panel. Background Art

[0002] Currently, the pixel units of full-color OLED display screens on the market are all composed of three primary colors: red, green, and blue. According to the three-primary-color principle, various colors can be generated by controlling the monochromatic gray levels of the red, green, and blue sub-pixel units, thereby displaying a color picture.

[0003] In order to prevent the reflection of the OLED display screen, a polarizer needs to be provided on the light-emitting side. The polarizer uses the principle of polarized light and can effectively reduce the reflection intensity of ambient light on the screen. However, the transmittance of the polarizer is only about 40%. In order to achieve higher light-emitting brightness, more power consumption is required, and the price of the polarizer is relatively expensive. In addition, the attachment of the polarizer requires manual or automatic machine operation. At the same time, due to problems in the operation process, a certain number of defective pieces appear, and there are high process difficulties such as dust, bubbles in the patch, and the polarizer being attached crookedly, resulting in insufficient production yield and efficiency, further increasing the production cost of the OLED display screen.

[0004] For the above reasons, panel factories in the display industry are all adopting a color-resist layer to replace the non-polarizer technology to reduce power consumption. Without the reflection suppression of the polarizer, the color-resist layer can improve the light-emitting brightness, luminous efficiency, reduce power consumption, and extend the life of the OLED display panel. However, the reduction of the reflectivity of the color filter is achieved through the black matrix. Generally, for the black matrix and RGB color films with respect to ambient light, the RGB color films themselves have a certain reflectivity. For example, the reflectivity of the red color resist is 2.63%, the reflectivity of the green color resist is 9.08%, and the reflectivity of the blue color resist is 1.05%. Especially when ambient light passes through the RGB color film and is reflected by the anode of the OLED device, a strong reflection will be formed at the anode opening area position, resulting in a strong reflection effect at the green color resist area on the surface of the OLED display screen, with a large brightness, thus affecting the poor display brightness uniformity, which needs to be improved. Summary of the Invention

[0005] Based on the problems of the prior art, the present application provides an OLED display panel, which can solve the technical problem in the prior art that when using a color-resist layer and a black matrix to replace the polarizer made of polyvinyl alcohol material to play a role in thinning the polarizer, due to the reflection of ambient light passing through the color-resist layer by the anode of the light-emitting device, a strong reflection will be formed at the anode opening area position, especially a strong reflection effect is generated in the anode area corresponding to the green color resist, with a large brightness, thus resulting in poor display brightness uniformity.

[0006] In order to solve the above technical problems, the technical solutions provided by the present invention are as follows:

[0007] An embodiment of the present invention provides an OLED display panel, which includes a substrate, a light-emitting device layer located above the substrate, an optical coupling output layer located above the light-emitting device layer, a packaging layer located above the optical coupling output layer, and a color filter layer located above the packaging layer; the color filter layer includes a red filter layer, a green filter layer, and a blue filter layer that are disposed opposite to the light-emitting device layer; wherein, a green antireflection layer is further disposed between the light-emitting device layer and the green filter layer; the green antireflection layer is a fluoride material layer, and the fluoride is one or a combination of lithium fluoride, sodium fluoride, potassium fluoride, magnesium fluoride, and calcium fluoride.

[0008] According to a preferred embodiment of the present invention, the green antireflection layer is only disposed opposite to the green filter layer, a red antireflection layer is further disposed between the light-emitting device layer and the red filter layer, and a blue antireflection layer is further disposed between the light-emitting device layer and the blue filter layer; the green antireflection layer, the red antireflection layer, and the blue antireflection layer are all arranged in a block array.

[0009] According to a preferred embodiment of the present invention, the thickness of the green antireflection layer is one-fourth of the peak wavelength of green light; the red antireflection layer is one-fourth of the peak wavelength of red light, and the thickness of the blue antireflection layer is one-fourth of the peak wavelength of blue light; wherein, the peak wavelength of green light, the peak wavelength of red light, and the peak wavelength of blue light are all 440 nm to 630 nm.

[0010] According to a preferred embodiment of the present invention, the red antireflection layer, the green antireflection layer, and the blue antireflection layer are all low-refractive-index thin films arranged in the same layer, and their refractive indices are all less than 1.54.

[0011] According to a preferred embodiment of the present invention, grooves are provided in the optical coupling output layer and / or the packaging layer at positions corresponding to the green filter layer, the red filter layer, and the blue filter layer, and the green antireflection layer, the red antireflection layer, and the blue antireflection layer are all located in the grooves.

[0012] According to a preferred embodiment of the present invention, the green antireflection layer is only disposed opposite to the green filter layer, and antireflection layers are not provided on both sides of the red filter layer and the blue filter layer.

[0013] According to a preferred embodiment of the present invention, the green filter layer is a single-layer structure, and the green filter layer is provided below both the red filter layer and the blue filter layer.

[0014] According to a preferred embodiment of the present invention, a black matrix is further disposed between any two of the red filter layer, the green filter layer, and the blue filter layer; wherein, the red filter layer, the green filter layer, and the blue filter layer are respectively an R color resist, a G color resist, and a B color resist of the SPR220-4.5 system.

[0015] According to a preferred embodiment of the present invention, an optically transparent adhesive layer is further disposed on the side of the color filter layer away from the encapsulation layer, and a protective cover plate is further disposed on the side of the optically transparent adhesive layer away from the color filter layer, and the protective cover plate is an ultra-thin flexible glass.

[0016] According to a preferred embodiment of the present invention, the optical coupling output layer is a prism structure, and the side of the optical coupling output layer away from the light-emitting device is a continuously uneven structure; wherein, the material of the optical coupling output layer includes one material or a combination of more than one material among silicon nitride, silicon oxynitride, aluminum oxide, and zinc oxide.

[0017] Advantages of the present invention: The embodiment of the present invention provides an OLED display panel, which includes a substrate, a light-emitting device layer located on the substrate, an optical coupling output layer located on the light-emitting device layer, an encapsulation layer located on the optical coupling output layer, and a color filter layer located on the encapsulation layer; the color filter layer includes a red filter layer, a green filter layer, and a blue filter layer arranged in alignment with the light-emitting device layer; wherein, a green antireflection layer is further disposed between the light-emitting device layer and the green filter layer; the antireflection layer is a fluoride material layer, and the green fluoride is one or a combination of more than one material among lithium fluoride, sodium fluoride, potassium fluoride, magnesium fluoride, and calcium fluoride. Compared with the red filter layer and the blue filter layer, the green filter layer has the highest reflectivity corresponding to external light. Therefore, in the present invention, an antireflection layer is disposed between the green filter layer and the light-emitting device layer to further block external light from entering the light-emitting device layer. The fluoride particles in the antireflection layer can further absorb the reflected visible light (mainly white light), which can greatly reduce the transmittance of the full-band light (external light), thereby achieving the surface optical characteristics of low reflectivity, thereby improving the contrast of the display panel. At the same time, the red, green, and blue filter layers have different transmittances for different wavelengths, and the color filter layer with narrow-band transmittance can reduce the full width at half maximum of the OLED emission spectrum and improve the display color gamut of the picture. Description of the Drawings

[0018] In order to more clearly illustrate the technical solutions in the embodiments or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0019] Figure 1 The present invention provides a first structural schematic diagram of an OLED display panel.

[0020] Figure 2 The present invention provides a second structural schematic diagram of an OLED display panel.

[0021] Figure 3 The present invention provides a third structural schematic diagram of an OLED display panel.

[0022] Figure 4 The present invention provides a fourth structural schematic diagram of an OLED display panel.

[0023] Figure 5 is Figure 4 an enlarged view of the structure at position A in Detailed implementation manners

[0024] The following descriptions of the embodiments refer to the attached drawings, which are used to illustrate specific embodiments in which the present invention can be implemented. The directional terms mentioned in the present invention, such as [up], [down], [front], [back], [left], [right], [inside], [outside], [side], etc., are only references to the directions in the attached drawings. Therefore, the directional terms used are for explaining and understanding the present invention, rather than for limiting the present invention. In the drawings, units with similar structures are denoted by the same reference numerals. The dashed lines in the drawings indicate structures that do not exist in reality and are only used to illustrate the shape and position of the structures.

[0025] In view of the technical problem in the prior art that a color resist layer and a black matrix are used to replace a polarizer made of polyvinyl alcohol material to reduce the thickness of the polarizer, and due to the reflection of external light by the anode of the light-emitting device after passing through the color resist layer, strong reflection will be formed at the position of the anode opening area, especially in the anode area corresponding to the green color resist, resulting in a strong reflection effect and a large brightness, thus leading to poor display brightness uniformity. This embodiment can solve the above technical defects.

[0026] To solve the above technical problem, an embodiment of the present invention provides an OLED display panel, which includes a substrate, a light-emitting device layer located on the substrate, a light coupling output layer located on the light-emitting device layer, a packaging layer located on the light coupling output layer, and a color filter layer located on the packaging layer; the color filter layer includes a red filter layer, a green filter layer, and a blue filter layer that are arranged in alignment with the light-emitting device layer; wherein, a green antireflection layer is further provided between the light-emitting device layer and the green filter layer; the green antireflection layer is a fluoride material layer, and the fluoride is one or more of lithium fluoride, sodium fluoride, potassium fluoride, magnesium fluoride, and calcium fluoride.

[0027] Compared with the red and blue color filter layers, the green color filter layer has the highest reflectivity to external light. Therefore, an anti-reflection layer is provided between the green color filter layer and the light-emitting device layer corresponding to the present invention to further block external light from entering the light-emitting device layer. The fluoride particles in the anti-reflection layer can further absorb the reflected visible light (mainly white light), which can greatly reduce the transmittance of light in the entire wavelength band (external light), thereby achieving the surface optical characteristics of low reflectivity, improving the contrast of the display panel. At the same time, the red, green, and blue color filter layers have different transmittances for different wavelengths, and the color filter layer with narrow-band transmittance can reduce the full width at half maximum of the OLED emission spectrum and improve the display color gamut of the screen.

[0028] Specifically, as Figure 1 shown, the first film layer schematic diagram of an OLED display panel 100 is provided in an embodiment of the present invention. The OLED display panel 100 includes a substrate 101, a light-emitting device layer 102 located on the substrate 101, an optical coupling output layer 103 located on the light-emitting device layer 102, a packaging layer 104 located on the optical coupling output layer 103, and a color filter layer 105 located on the packaging layer 104; the color filter layer 105 includes a red color filter layer 1053, a green color filter layer 1051, and a blue color filter layer 1052 that are disposed opposite to the light-emitting device layer 102; the optical coupling output layer 103 is an optical brightness enhancement film, which is beneficial to improving the light output brightness and efficiency of the light-emitting device layer 102. The light-emitting device layer 102 includes a green light-emitting device 1021, a blue light-emitting device 1022, and a red light-emitting device 1023. The material of the optical coupling output layer 103 includes one material or more than one material among silicon nitride, silicon oxynitride, aluminum oxide, and zinc oxide.

[0029] Among them, a green anti-reflection layer 1061 is further provided between the light-emitting device layer 102 and the green color filter layer 1051. The green anti-reflection layer 1061 in this embodiment is only disposed opposite to the green color filter layer 1051, and anti-reflection layers are not provided on both sides of the red color filter layer 1053 and the blue color filter layer 1052, so as to indirectly reduce the reflectivity of the green color filter layer 1051 and avoid the problems of strong reflection effect and large brightness in the anode region corresponding to the green color resistor, thereby achieving better display brightness uniformity of the display panel.

[0030] A groove is provided at the position of the packaging layer 104 corresponding to the green color filter layer 1051 in this embodiment, and the green anti-reflection layer 1061 is located in the groove, and the green anti-reflection layer 1061 is located on the side of the packaging layer 104 close to the light-emitting device layer 102. In other embodiments, a groove is provided at the position of the optical coupling output layer corresponding to the green color filter layer 1051, and the green anti-reflection layer 1061 is located in the groove, and the position of the green anti-reflection layer 1061 is not specifically limited.

[0031] In this embodiment, a black matrix 1054 is further disposed between any two of the red color filter layer 1053, the blue color filter layer 1052, and the green color filter layer 1051; wherein, the red color filter layer 1053, the green color filter layer 1051, and the blue color filter layer 1052 are respectively the R color resist, the G color resist, and the B color resist of the SPR220-4.5 system. An optically transparent adhesive layer 107 is further disposed on the side of the color filter layer 105 away from the encapsulation layer 104, and a protective cover plate 108 is further disposed on the side of the optically transparent adhesive layer 107 away from the color filter layer 105. The protective cover plate 108 is an ultra-thin flexible glass. A touch layer is further disposed between the optically transparent adhesive layer 107 and the protective cover plate 108 in another embodiment.

[0032] The substrate 101 of this embodiment is an array substrate, and the light-emitting device layer includes light-emitting devices arranged in an array, such as an R light-emitting device 1023, a B light-emitting device 1022, and a G light-emitting device 1021. The functional film layers of any two adjacent light-emitting devices are separated from each other; wherein, each light-emitting device includes an anode, a hole injection layer and a hole transport layer located on the anode, a light-emitting material layer located on the hole injection layer and the hole transport layer, an electron transport layer and an electron injection layer located on the light-emitting material layer, and a cathode located above the electron transport layer and the electron injection layer. The anode is electrically connected to the drain of the array substrate through a via hole. The source of the array substrate is electrically connected to the positive electrode of an external power supply, and the cathode is electrically connected to the negative electrode of the external power supply, so as to realize the normal transmission of the driving electrical signal of the OLED display panel 100.

[0033] The encapsulation layer 104 in this embodiment includes a first inorganic layer, an organic layer, and a second inorganic layer. The first inorganic layer and the second inorganic layer are prepared by physical vapor deposition. The organic layer generally uses an inkjet printing method, which not only has a high light transmittance but also can effectively relieve the stress of the inorganic layer. The first inorganic layer is attached to the surface of the optical coupling output layer 103. In another embodiment, the encapsulation layer 104 is an encapsulation cover plate, which is attached to the surface of the optical coupling output layer 103 with glass glue.

[0034] As Figure 2 shown, the embodiment of the present invention provides a second schematic diagram of the film layers of an OLED display panel 100. The green antireflection layer 1061 of this embodiment is a whole-layer structure. The green antireflection layer 1061 is disposed below both the red color filter layer 1053 and the blue color filter layer 1052. The green antireflection layer 1061 is located between the encapsulation layer 104 and the optical coupling output layer 103, so as to further indirectly reduce the reflectivity of the color filter layer 105, thereby realizing better display brightness uniformity of the display panel. The other structures are similar to those of Figure 1 the structure, and will not be elaborated here.

[0035] As Figure 3As shown in the figure, an embodiment of the present invention provides a third film layer schematic diagram of an OLED display panel 100. In this embodiment, the green antireflection layer 1061 is only disposed opposite to the green color filter layer 1051. A red antireflection layer 1063 is further disposed between the light-emitting device layer 102 and the red color filter layer 1053, and a blue antireflection layer 1062 is further disposed between the light-emitting device layer 102 and the blue color filter layer 1052; the green antireflection layer 1061, the red antireflection layer 1063, and the blue antireflection layer 1062 are all arranged in a block array. The thickness of the green antireflection layer 1061 is one-fourth of the peak wavelength of green light; the red antireflection layer 1063 is one-fourth of the peak wavelength of red light, and the thickness of the blue antireflection layer 1062 is one-fourth of the peak wavelength of blue light; wherein, the peak wavelength of green light, the peak wavelength of red light, and the peak wavelength of blue light are all 440nm to 630nm. The red antireflection layer 1063, the green antireflection layer 1061, and the blue antireflection layer 1062 are all low refractive index thin films provided on the same layer, and their refractive indices are all less than 1.54. Grooves are provided in the light coupling output layer 103 and / or the encapsulation layer 104 corresponding to the positions of the green color filter layer 1051, the red color filter layer 1053, and the blue color filter layer 1052, and the green antireflection layer 1061, the red antireflection layer 1063, and the blue antireflection layer 1062 are all located in the grooves.

[0036] Since the reflectivity of the red color resist is 2.63%, the reflectivity of the green color resist is 9.08%, and the reflectivity of the blue color resist is 1.05%, the thickness of the green antireflection layer 1061 is preferably greater than the thickness of the red antireflection layer 1063, and the thickness of the red antireflection layer 1063 is greater than the thickness of the blue color filter layer 1052.

[0037] The red antireflection layer 1063, the green antireflection layer 1061, and the blue antireflection layer 1062 are all low refractive index thin films provided on the same layer, and their refractive indices are all less than 1.54. The materials of all the antireflection layers are fluoride material layers, and the fluoride is one or more combined materials of lithium fluoride, sodium fluoride, potassium fluoride, magnesium fluoride, and calcium fluoride.

[0038] As Figure 4 shown, an embodiment of the present invention provides a fourth film layer schematic diagram of an OLED display panel 100. In this embodiment, the OLED display panel 100 is in Figure 1On the basis of the structure in [reference], it is further improved. The side of the optical coupling output layer 103 away from the light-emitting device layer 102 is a continuous uneven surface 1031, which is beneficial to increasing and improving the light extraction angle and light extraction efficiency of the light-emitting device layer 102. The optical coupling output layer 103 of this embodiment is preferably a prism structure, and the material of the prism structure includes one material or a combination of more than one material among silicon nitride, silicon oxynitride, aluminum oxide, and zinc oxide. The side of the prism structure away from the light-emitting device layer 102 is a continuous uneven surface 1031.

[0039] Figure 5 is Figure 4 The enlarged view of the structure at position A in [reference]. When the light rays S1 and S2 emitted by the light-emitting device reach the uneven surface 1031, multiple light rays are refracted and scattered at any position on one side of the uneven surface 1031 and emitted, such as light rays S3 and S4. The light ray S3 directly enters the encapsulation layer. After the light ray S4 is refracted or scattered, it shoots towards the opposite side, is reflected and refracted again, and then shoots towards the encapsulation layer again, thereby improving the light extraction angle and light extraction efficiency of the light-emitting device layer 102.

[0040] In another embodiment, the antireflection layer of the present invention includes a silica gel film and fluoride particles uniformly doped in the silica gel film. The fluoride is one or a combination of more than one material among lithium fluoride, sodium fluoride, potassium fluoride, magnesium fluoride, and calcium fluoride; the silica gel film itself can reduce the reflectivity of visible light in the 380 - 780 nm band, and the fluoride particles can further absorb the externally reflected visible light, which can greatly reduce the transmittance of the externally reflected visible light in the entire band, thereby realizing the surface optical property of low reflectivity, improving the contrast of the display panel. At the same time, the red, green, and blue color filter layers have different transmittances for different wavelengths, improving the display color gamut of the picture.

[0041] According to the above OLED display panel, the present invention also provides a method for manufacturing an OLED display panel, and the method includes:

[0042] Step S1: Provide a substrate, prepare a light-emitting device layer on the substrate, and prepare an optical coupling output layer on the light-emitting device layer.

[0043] Step S2: Prepare a green antireflection layer on the surface of the optical coupling output layer and an encapsulation layer covering the green antireflection layer. The antireflection layer is a fluoride material layer, and the fluoride is one or a combination of more than one material among lithium fluoride, sodium fluoride, potassium fluoride, magnesium fluoride, and calcium fluoride.

[0044] Step S3: Prepare a color filter layer on the encapsulation layer. Among them, the color filter layer includes a red color filter layer, a green color filter layer, and a blue color filter layer that are arranged in alignment with the light-emitting device layer; the green antireflection layer is arranged in alignment with the green color filter layer.

[0045] Step S4, preparing an optically transparent adhesive layer on the color filter layer, preparing a touch layer on the optically transparent adhesive layer, and preparing a protective cover plate on the touch layer.

[0046] Preferably, the green anti-reflection layer is formed by vacuum thermal evaporation; or by precision metal masking.

[0047] Preferably, the substrate is a TFT array substrate, an anode and a pixel definition layer are prepared on a planarization layer on the surface of the TFT array substrate, the anode is electrically connected to the drain of a driving thin film transistor in the TFT array substrate through a via, the pixel definition layer is separately arranged to form a pixel opening, and a light-emitting device is prepared in the pixel opening, the light-emitting device includes a hole injection layer located on the anode, a light-emitting material layer located on the hole injection layer, an electron transport layer located on the light-emitting material layer, a cathode located on the electron transport layer, and an optical coupling output layer located on the cathode.

[0048] An embodiment of the present invention provides an OLED display panel, which includes a substrate, a light-emitting device layer located on the substrate, a light coupling output layer located on the light-emitting device layer, an encapsulation layer located on the light coupling output layer, and a color filter layer located on the encapsulation layer; the color filter layer includes a red filter layer, a green filter layer and a blue filter layer arranged in alignment with the light-emitting device layer; wherein a green anti-reflection layer is further arranged between the light-emitting device layer and the green filter layer; the anti-reflection layer is a fluoride material layer, and the fluoride is one or more of lithium fluoride, sodium fluoride, potassium fluoride, magnesium fluoride and calcium fluoride. Combination material. Compared with the red filter layer and the blue filter layer, the green filter layer has the highest reflectivity to external light. Therefore, an anti-reflection layer is arranged between the green filter layer and the light-emitting device layer corresponding to the present invention to further block external light from entering the light-emitting device layer. The fluoride particles in the anti-reflection layer can further absorb the reflected visible light (mainly white light), which can greatly reduce the transmittance of the full-band light (external light), thereby achieving the surface optical property of low reflectivity, thereby improving the contrast of the display panel. At the same time, the red, green and blue filter layers have differentiated transmittances for different wavelengths. The narrow-band transmittance color filter layer can reduce the half-peak width of the OLED emission spectrum and improve the color gamut of the picture display.

[0049] In summary, although the present invention has been disclosed as above in terms of preferred embodiments, the above preferred embodiments are not intended to limit the present invention. A person skilled in the art may make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention shall be based on the scope defined in the claims.

Claims

1. An OLED display panel, characterized in that, It includes a substrate, a light-emitting device layer located on the substrate, an optical coupling output layer located on the light-emitting device layer, a packaging layer located on the optical coupling output layer, and a color filter layer located on the packaging layer; the color filter layer includes a red filter layer, a green filter layer, and a blue filter layer that are arranged in alignment with the light-emitting device layer. Wherein, a green antireflection layer is further provided between the light-emitting device layer and the green filter layer; the green antireflection layer is a fluoride material layer, and the fluoride is one or more composite materials selected from lithium fluoride, sodium fluoride, potassium fluoride, magnesium fluoride, and calcium fluoride; the optical coupling output layer is a prism structure, and the side of the optical coupling output layer away from the light-emitting device layer is a continuously uneven structure, and grooves are provided at positions of the optical coupling output layer and / or the packaging layer corresponding to the green filter layer, and the green antireflection layer is located in the grooves.

2. The OLED display panel according to claim 1, wherein The green antireflection layer is only arranged in alignment with the green filter layer, a red antireflection layer is further provided between the light-emitting device layer and the red filter layer, and a blue antireflection layer is further provided between the light-emitting device layer and the blue filter layer; the green antireflection layer, the red antireflection layer, and the blue antireflection layer are all arranged in a block array.

3. The OLED display panel according to claim 2, characterized in that, The thickness of the green antireflection layer is one-fourth of the peak wavelength of green light; the red antireflection layer is one-fourth of the peak wavelength of red light, and the thickness of the blue antireflection layer is one-fourth of the peak wavelength of blue light; wherein, the peak wavelength of green light, the peak of red light, and the peak wavelength of blue light are all 440 nm to 630 nm.

4. The OLED display panel according to claim 2, wherein The red antireflection layer, the green antireflection layer, and the blue antireflection layer are all low-refractive-index thin films arranged in the same layer, and their refractive indices are all less than 1.

54.

5. The OLED display panel according to claim 4, wherein Grooves are provided at positions of the optical coupling output layer and / or the packaging layer corresponding to the red filter layer and the blue filter layer, and the red antireflection layer and the blue antireflection layer are both located in the grooves.

6. The OLED display panel according to claim 1, wherein The green antireflection layer is only arranged in alignment with the green filter layer, and antireflection layers are not provided on both sides of the red filter layer and the blue filter layer.

7. The OLED display panel according to claim 1, wherein The green filter layer is a whole-layer structure, and the green filter layer is provided below the red filter layer and the blue filter layer.

8. The OLED display panel according to claim 1, wherein A black matrix is further provided between any two of the red filter layer, the green filter layer, and the blue filter layer. Wherein, the red filter layer, the green filter layer, and the blue filter layer are respectively the R color resist, G color resist, and B color resist of the SPR 220-4.5 system.

9. The OLED display panel according to claim 6, wherein, An optically transparent adhesive layer is further provided on the side of the color filter layer away from the packaging layer, and a protective cover plate is further provided on the side of the optically transparent adhesive layer away from the color filter layer, and the protective cover plate is an ultra-thin flexible glass.

10. The OLED display panel according to claim 1, wherein, The material of the optical coupling output layer includes one material or a combination of more than one material selected from silicon nitride, silicon oxynitride, aluminum oxide, and zinc oxide.

Images