An OLED display panel and display

Abstract

This invention relates to the field of organic light-emitting diodes (OLEDs), and provides an OLED display panel and a display using the OLED display panel. The OLED display panel includes a substrate, a buffer light-absorbing layer, a light-filtering layer, an anode, a light-emitting layer, a cathode, a light-extracting layer, an encapsulation layer, a touch layer, a circular polarizer, and an anti-reflection layer, stacked sequentially. It also includes a brightness enhancement film disposed between the light-emitting layer and the circular polarizer. This invention has high light transmittance and contrast ratio.

Description

Technical Field

[0001] This invention relates to the field of organic light-emitting diodes, and more specifically to an OLED display panel and display. Background Technology

[0002] Organic light-emitting diodes (OLEDs) are devices that generate electroluminescence using a multilayer organic thin film structure. They have advantages such as flexible fabrication, low driving voltage, and low power consumption, and can be applied to flat panel displays, new lighting, wearables, and the development of smart electronic products.

[0003] OLED is particularly prominent in the application of flat panel displays because OLED displays are thinner, lighter, brighter, consume less power, have a faster response time, higher resolution, better flexibility, and higher luminous efficiency than LCD (Liquid Crystal Display). They can meet consumers' new demands for display technology and structurally eliminate the need for a backlight module required by LCD, making the structure much simpler. Therefore, OLED displays have always been considered the perfect display.

[0004] However, OLED displays have a shorter lifespan, higher maintenance costs, and are susceptible to ambient light. OLED panels reflect light under strong indoor or outdoor light, causing significant image interference and reducing contrast. To combat ambient light and reduce its interference, circular polarizers are added to OLED panels to resist ambient light reflection. However, these polarizers absorb 50% of the light emitted from the OLED organic layer, resulting in low light transmittance and low light utilization. To address this, brightness enhancement films are added to OLED panels to improve light utilization.

[0005] However, with the addition of a brightness enhancement film, when ambient light shines on the surface of the linear polarizer, it is decomposed into light perpendicular to the absorption axis of the linear polarizer and light parallel to the absorption axis. The light parallel to the absorption axis is absorbed, while the light perpendicular to the absorption axis passes through the linear polarizer and then through a wide-bandgap phase difference compensation film, transforming into left-handed or right-handed circularly polarized light. After passing through the brightness enhancement film, it reaches the metal electrode, where it is reflected and its direction of rotation changes. After multiple reflections between the metal electrode and the brightness enhancement film, it becomes circularly polarized light that can pass through the brightness enhancement film, passes through the wide-bandgap phase difference compensation film again, and is transformed into light perpendicular to the absorption axis of the linear polarizer before being emitted. Therefore, while adding a brightness enhancement film improves light utilization, it causes ambient light that was originally absorbed by the circular polarizer to be emitted from the OLED display panel into the outside world, thus reducing the display's contrast. Summary of the Invention

[0006] In view of the technical problem that adding a brightness enhancement film reduces the display contrast, the purpose of this invention is to provide an OLED display panel and display with high contrast and high light transmittance.

[0007] The technical solution adopted by the present invention to solve its technical problem is as follows: The present invention provides an OLED display panel, which includes a substrate, a buffer light-absorbing layer, a light-filtering layer, an anode, a light-emitting layer, a cathode, a light-extracting layer, an encapsulation layer, a touch layer, a circular polarizer, an anti-reflection layer, and a brightness enhancement film disposed between the light-emitting layer and the circular polarizer.

[0008] The light-emitting layer is divided into a red sub-pixel region, a green sub-pixel region, and a blue sub-pixel region along a direction parallel to the substrate, and an organic separator is disposed between adjacent sub-pixel regions; the light-filtering layer is composed of a one-dimensional photonic crystal, and is divided into a red light-filtering region, a green light-filtering region, and a blue light-filtering region along a direction parallel to the substrate, with the red light-filtering region corresponding to the position of the red sub-pixel region, the green light-filtering region corresponding to the position of the green sub-pixel region, and the blue light-filtering region corresponding to the position of the blue sub-pixel region;

[0009] The buffer light-absorbing layer is made by setting a light-absorbing layer on the buffer layer or uniformly doping a light-absorbing material in the buffer layer.

[0010] Furthermore, the aforementioned circular polarizer includes a wide-bandgap phase difference compensation film and a linear polarizer stacked together.

[0011] Furthermore, the aforementioned wideband phase difference compensation film is a liquid crystal coated phase difference compensation film with a thickness of 0.1 to 10 μm or an extended phase difference compensation film with a thickness of 15 to 60 μm.

[0012] Furthermore, the Re(550) of the above-mentioned wide-band phase difference compensation film is 80-190nm, and the Re(450) / Re(550) is 0.7-0.9, and the Re(650) / Re(550) is 1.1-1.4.

[0013] Furthermore, the light-absorbing layer is made of a black material that can absorb ambient light, a copper-zinc-tin-sulfur-selenium compound, or a copper-indium-gallium-sulfur-selenium compound; the light-absorbing material is one or more of carbon nanotubes, nickel-iron alloys, and benzothiophene-like chemical substances, and the particle size of the light-absorbing material is less than 1 / 3 of the thickness of the buffer layer.

[0014] Furthermore, the aforementioned brightness enhancement film is a thin film made of chiral nematic liquid crystal or cholesteric polymer liquid crystal, the thickness of the brightness enhancement film is 2 to 70 μm, and the reflection band of the brightness enhancement film includes the entire emission band of the light-emitting layer.

[0015] Furthermore, the aforementioned organic membrane is a light-absorbing material.

[0016] Furthermore, the anode described above is a thin film made of transparent conductive oxide.

[0017] Furthermore, the aforementioned antireflection layer is a wideband AR antireflection layer.

[0018] The present invention also provides an OLED display, which includes the OLED display panel described above.

[0019] The beneficial effects of this invention are: the OLED display panel provided by this invention has high contrast and high light transmittance. The OLED display panel provided by this invention includes a substrate, a buffer absorption layer, a filter layer, an anode, a light-emitting layer, a cathode, a light extraction layer, an encapsulation layer, a touch layer, a circular polarizer, and an anti-reflection layer, stacked sequentially. It also includes a brightness enhancement film disposed between the light-emitting layer and the circular polarizer. The filter layer and the absorption layer can eliminate most ambient light. The specific working principle of the filter layer and the absorption layer in reducing ambient light is as follows: When ambient light shines on the surface of the linear polarizer, the ambient light is decomposed into light perpendicular to the absorption axis of the linear polarizer and light parallel to the absorption axis of the linear polarizer. The light parallel to the absorption axis of the linear polarizer is absorbed by the linear polarizer, while the light perpendicular to the absorption axis can pass through the linear polarizer. Most of the ambient light passing through the linear polarizer is converted into left-handed or right-handed circularly polarized light by a wide-bandgap phase difference compensation film, and then incident on the filter layer below the anode through the brightness enhancement film. After being filtered by the filter layer, ambient light corresponding to the bandgap of the photonic crystal in the filter layer is reflected, and then reflected to the outside world through the brightness enhancement film and circular polarizer. Most of the ambient light can pass through the filter layer and is absorbed by the absorption layer. The ambient light reflected by the filter layer changes direction, is reflected back to the filter layer by the brightness enhancement film, is reflected again by the filter layer, and its direction changes to circularly polarized light that can pass through the brightness enhancement film. It then passes through the wide-band phase difference compensation film and is transformed into light perpendicular to the absorption axis of the linear polarizer before being emitted. However, at this point, the ambient light has been absorbed by various means and has undergone multiple reflections and penetrations, leaving very little of it. Therefore, this display panel has high contrast and transmittance. The brightness enhancement film allows light emitted from the light-emitting layer, which was originally absorbed by the linear polarizer, to be re-emitted to the outside world, significantly improving the light transmittance of the device. On this basis, the use of a filter layer and an absorption layer further reduces ambient light and improves the contrast of the display panel. Furthermore, the anode is placed on top of the filter layer, which replaces the color filter layer and the reflective layer, reducing the screen thickness. A microcavity structure is formed between the filter layer and the cathode, generating a microcavity effect that improves the light extraction efficiency and color purity of the light-emitting layer.

[0020] Furthermore, the antireflection layer is a broadband AR antireflection layer, which can reduce the reflectivity of ambient light in the visible light band. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of Embodiment 1 of the present invention.

[0022] In the figure, 1-substrate, 2-buffer layer, 3-light-absorbing layer, 4-filter layer, 41-red light filter area, 42-green light filter area, 43-blue light filter area, 5-anode, 6-light-emitting layer, 61-red sub-pixel area, 62-green sub-pixel area, 63-blue sub-pixel area, 7-cathode, 8-light extraction layer, 9-encapsulation layer, 10-touch layer, 11-brightness enhancement film, 12-circular polarizer, 121-wideband phase difference compensation film, 122-linear polarizer, 13-antireflection layer. Specific Implementation

[0023] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0024] The present invention provides an OLED display panel and a display using the OLED display panel. The display panel includes a substrate 1, a buffer light-absorbing layer, a light-filtering layer 4, an anode 5, a light-emitting layer 6, a cathode 7, a light-extracting layer 8, an encapsulation layer 9, a touch layer 10, a circular polarizer 12, and an anti-reflection layer 13, which are stacked in sequence. It also includes a brightness enhancement film 11 disposed between the light-emitting layer 6 and the circular polarizer 12.

[0025] The aforementioned buffer light-absorbing layer is made by setting a light-absorbing layer 3 on the buffer layer 2 or uniformly doping a light-absorbing material in the buffer layer 2. The light-absorbing layer 3 can be prepared on the buffer layer 2 by processes such as spin coating, spraying, and heat treatment. The light-absorbing layer 3 is made of a black material that can absorb ambient light, a copper-zinc-tin-sulfur-selenium compound, or a copper-indium-gallium-sulfur-selenium compound. The light-absorbing material is one or more of carbon nanotubes, nickel-iron alloys, and benzothiophene-like chemical substances. The particle size of the light-absorbing material is less than 1 / 3 of the thickness of the buffer layer.

[0026] The aforementioned light-emitting layer 6 is divided into a red sub-pixel region 61, a green sub-pixel region 62, and a blue sub-pixel region 63 along a direction parallel to the substrate. An organic membrane made of light-absorbing material is disposed between adjacent sub-pixel regions. A microcavity structure is formed between the filter layer 4 and the cathode 7, exhibiting a microcavity effect. It is composed of a one-dimensional photonic crystal. The filter layer 4 is also divided into a red light filter region 41, a green light filter region 42, and a blue light filter region 43 along a direction parallel to the substrate. The red light filter region 41 corresponds to the position of the red sub-pixel region 61, the green light filter region 42 corresponds to the position of the green sub-pixel region 62, and the blue light filter region 43 corresponds to the position of the blue sub-pixel region 63. The one-dimensional photonic crystal is an optical device composed of two media arranged in a periodic alternation. It can periodically form silicon oxide and silicon nitride. By designing the thickness of both, the bandgap of the one-dimensional photonic crystal can correspond one-to-one with the sub-pixels of the light-emitting layer 6. When the bandgap of the one-dimensional photonic crystal corresponds to the red sub-pixel, it reflects red light and transmits light of other colors; when the bandgap of the one-dimensional photonic crystal corresponds to the green sub-pixel, it reflects green light and transmits light of other colors; when the bandgap of the one-dimensional photonic crystal corresponds to the blue sub-pixel, it reflects blue light and transmits light of other colors. The red light filter region 41, the green light filter region 42, and the blue light filter region 43 are all bandgap regions of the one-dimensional photonic crystal.

[0027] The aforementioned circular polarizer 12 includes a wideband phase difference compensation film 121 and a linear polarizer 122 stacked together. The wideband phase difference compensation film 121 is a liquid crystal coated phase difference compensation film with a thickness of 0.1–10 μm or an extended phase difference compensation film with a thickness of 15–60 μm. The Re(550) of the wideband phase difference compensation film 121 is 80–190 nm, and Re(450) / Re(550) is 0.7–0.9, and Re(650) / Re(550) is 1.1–1.4, wherein Re(λ) satisfies the following formula:

[0028] Re(λ)=(nx-ny)×d

[0029] In the formula, Re is the in-plane phase difference; "Re(λ)" is the in-plane phase difference measured at 23℃ with light of wavelength λnm; "nx" is the refractive index in the direction of maximum refractive index in the plane (i.e., the slow axis direction); "ny" is the refractive index in the direction orthogonal to the slow axis in the plane (i.e., the fast axis direction); and d is the thickness of the layer (film) in nm.

[0030] The aforementioned brightness enhancement film 11 is a thin film made of chiral nematic liquid crystal or cholesteric polymer liquid crystal. The thickness of the brightness enhancement film 11 is 2–70 μm, and its reflection band includes the entire emission band of the light-emitting layer 6. The brightness enhancement film 11 necessarily reflects continuously between 435 and 680 nm, with a visible light bandwidth greater than 245 nm. Outside the necessarily reflected region, it can be designed to continuously reflect all visible light, reflect part of the visible light, or reflect a small portion of the infrared band, depending on the application requirements, with reflection wavelengths between 380 and 2000 nm.

[0031] The aforementioned anode 5 is a thin film made of transparent conductive oxide, including indium tin oxide (ITO) and indium zinc oxide (IZO).

[0032] The aforementioned anti-reflection layer 13 is a wideband AR anti-reflection layer.

[0033]

Example 1

[0034] Example 1 includes a substrate, a buffer layer, a light-absorbing layer, a light-filtering layer, an anode, a light-emitting layer, a cathode, a light-extracting layer, an encapsulation layer, a touch layer, a brightness enhancement film, a circular polarizer, and an anti-reflection layer, which are stacked in sequence.

[0035] (1) Prepare a substrate and set a buffer layer on the substrate;

[0036] (2) A light-absorbing layer is prepared on the buffer layer using black material;

[0037] (3) A filter layer is set on the light-absorbing layer;

[0038] (4) An anode is prepared on the filter layer, wherein the anode is a thin film made of indium tin oxide (ITO);

[0039] (5) A light-emitting layer is prepared on the anode layer using a vapor deposition process;

[0040] (6) A cathode, a light extraction layer, an encapsulation layer, and a touch layer are sequentially fabricated on the light-emitting layer;

[0041] (7) A chiral nematic liquid crystal is made into a thin film with a thickness of 2 μm to obtain a brightness enhancement film, and the brightness enhancement film is pasted onto the touch layer;

[0042] (8) A circular polarizer was fabricated by bonding a linear polarizer to a wide-band phase difference compensation film using optical adhesive (OCA). The wide-band phase difference compensation film was a single-layer liquid crystal coated phase difference compensation film with a thickness of 0.1 μm. The wide-band phase difference compensation film of the circular polarizer was then bonded to a brightness enhancement film, and an anti-reflection layer was deposited on the circular polarizer to obtain Example 1, the structure of which is as follows. Figure 1 As shown.

[0043]

Example 2

[0044] Example 2 includes a substrate, a buffer light-absorbing layer, a filter layer, an anode, a light-emitting layer, a cathode, a light extraction layer, an encapsulation layer, a brightness enhancement film, a touch layer, a circular polarizer, and an anti-reflection layer, which are stacked in sequence.

[0045] (1) Prepare a substrate and set a buffer layer on the substrate;

[0046] (2) A light-absorbing layer is prepared on the buffer layer by copper zinc tin sulfur selenium compound (CZTSSe);

[0047] (3) Set a filter layer on the light-absorbing layer.

[0048] (4) An anode is prepared on the filter layer, wherein the anode is a thin film made of indium zinc oxide (IZO);

[0049] (5) A light-emitting layer is prepared on the anode layer using a vapor deposition process;

[0050] (6) A cathode, a light extraction layer, and an encapsulation layer are sequentially prepared on the light-emitting layer;

[0051] (7) A chiral nematic liquid crystal is made into a thin film with a thickness of 36 μm to obtain a brightness enhancement film. The brightness enhancement film is then pasted onto the encapsulation layer, and a touch layer is prepared on the brightness enhancement film.

[0052] (8) A circular polarizer was fabricated by bonding a linear polarizer to a wide-band phase difference compensation film using optical adhesive (OCA). The wide-band phase difference compensation film was a liquid crystal coated phase difference compensation film with a thickness of 5 μm and a double-layer structure. The wide-band phase difference compensation film of the circular polarizer was then attached to the touch layer, and an anti-reflection layer was deposited on the circular polarizer to obtain Example 2.

[0053]

Example 3

[0054] Example 3 includes a substrate, a buffer light-absorbing layer, a filter layer, an anode, a light-emitting layer, a cathode, a light extraction layer, a brightness enhancement film, an encapsulation layer, a touch layer, a circular polarizer, and an anti-reflection layer, which are stacked in sequence.

[0055] (1) Prepare a substrate and set a buffer layer on the substrate;

[0056] (2) A light-absorbing layer is prepared on the buffer layer by copper indium gallium sulfide selenide (CIGSSe);

[0057] (3) A filter layer is set on the light-absorbing layer;

[0058] (4) An anode is prepared on the filter layer, wherein the anode is a thin film made of indium tin oxide (ITO);

[0059] (5) A light-emitting layer is prepared on the anode layer using a vapor deposition process;

[0060] (6) A cathode and a light extraction layer are sequentially prepared on the light-emitting layer;

[0061] (7) A chiral nematic liquid crystal is made into a thin film with a thickness of 70 μm to obtain a brightness enhancement film. The brightness enhancement film is then pasted onto the light extraction layer. An encapsulation layer and a touch layer are then sequentially prepared on the brightness enhancement film.

[0062] (8) A circular polarizer was fabricated by bonding a linear polarizer to a wide-band phase difference compensation film using optical adhesive (OCA). The wide-band phase difference compensation film was a five-layer liquid crystal coated phase difference compensation film with a thickness of 10 μm. The wide-band phase difference compensation film of the circular polarizer was then attached to the touch layer, and an anti-reflection layer was deposited on the circular polarizer to obtain Example 3.

[0063]

Example 4

[0064] Example 4 includes a substrate, a buffer light-absorbing layer, a filter layer, an anode, a light-emitting layer, a cathode, a brightness enhancement film, a light extraction layer, an encapsulation layer, a touch layer, a circular polarizer, and an anti-reflection layer, which are stacked in sequence.

[0065] (1) Prepare a substrate and a buffer layer. Uniformly dop carbon nanotubes with a particle size of 1 / 4 of the thickness of the buffer layer in the buffer layer. Combine the buffer layer and the light-absorbing layer into a buffer light-absorbing layer. Set the buffer light-absorbing layer on the substrate.

[0066] (2) Set a filter layer on the buffer light-absorbing layer;

[0067] (3) An anode is prepared on the filter layer, wherein the anode is a thin film made of indium tin oxide (ITO);

[0068] (4) A light-emitting layer is prepared on the anode layer using a vapor deposition process;

[0069] (5) Fabricate a cathode on the light-emitting layer;

[0070] (6) A 2 μm thick film of cholesteric polymer liquid crystal is prepared to obtain a brightness enhancement film. The brightness enhancement film is pasted onto the cathode. A light extraction layer, an encapsulation layer and a touch layer are sequentially prepared on the brightness enhancement film.

[0071] (7) A circular polarizer was fabricated by bonding a linear polarizer to a wide-band phase difference compensation film using optical adhesive (OCA). The wide-band phase difference compensation film was a single-layer extended phase difference compensation film with a thickness of 15 μm. The wide-band phase difference compensation film of the circular polarizer was then attached to the touch layer, and an anti-reflection layer was set on the circular polarizer to obtain Example 4.

[0072]

Example 5

[0073] Example 5 includes a substrate, a buffer light-absorbing layer, a filter layer, an anode, a light-emitting layer, a brightness enhancement film, a cathode, a light extraction layer, an encapsulation layer, a touch layer, a circular polarizer, and an anti-reflection layer, which are stacked in sequence.

[0074] (1) Prepare a substrate and a buffer layer. Uniformly dop a nickel-iron alloy with a particle size of 1 / 10 of the buffer layer thickness in the buffer layer. Combine the buffer layer and the light-absorbing layer into a buffer light-absorbing layer. Set the buffer light-absorbing layer on the substrate.

[0075] (2) Set a filter layer on the buffer light-absorbing layer;

[0076] (3) An anode is prepared on the filter layer, wherein the anode is a thin film made of indium zinc oxide (IZO);

[0077] (4) A light-emitting layer is prepared on the anode layer using a vapor deposition process;

[0078] (5) The cholesteric phase polymer liquid crystal is made into a thin film with a thickness of 36 μm (i.e., a brightening film), and the brightening film is attached to the side of the light-emitting layer away from the anode.

[0079] (6) A cathode, a light extraction layer, an encapsulation layer, and a touch layer are sequentially prepared on the brightness enhancement film;

[0080] (7) A circular polarizer was fabricated by bonding a linear polarizer to a wide-band phase difference compensation film using optical adhesive (OCA). The wide-band phase difference compensation film was an extended phase difference compensation film with a four-layer structure and a thickness of 37.5 μm. The wide-band phase difference compensation film of the circular polarizer was then attached to the touch layer, and an anti-reflection layer was set on the circular polarizer to obtain Example 5.

[0081]

Example 6

[0082] Example 6 includes a substrate, a buffer light-absorbing layer, a filter layer, an anode, a light-emitting layer, a brightness enhancement film, a cathode, a light extraction layer, an encapsulation layer, a touch layer, a circular polarizer, and an anti-reflection layer, which are stacked in sequence.

[0083] (1) Prepare a substrate and a buffer layer. Uniformly dop a benzothiophene-type chemical substance with a particle size of 1 / 20 of the buffer layer thickness in the buffer layer. Combine the buffer layer and the light-absorbing layer into a buffer light-absorbing layer. Set the buffer light-absorbing layer on the substrate.

[0084] (2) Set a filter layer on the buffer light-absorbing layer;

[0085] (3) An anode is prepared on the filter layer, wherein the anode is a thin film made of indium tin oxide (ITO);

[0086] (4) A light-emitting layer is prepared on the anode layer using a vapor deposition process;

[0087] (5) The cholesteric phase polymer liquid crystal is made into a thin film with a thickness of 70 μm (i.e., a brightening film), and the brightening film is attached to the side of the light-emitting layer away from the anode.

[0088] (6) A cathode, a light extraction layer, an encapsulation layer, and a touch layer are sequentially prepared on the brightness enhancement film;

[0089] (7) A circular polarizer was fabricated by bonding a linear polarizer to a wide-band phase difference compensation film using optical adhesive (OCA). The wide-band phase difference compensation film was an extended phase difference compensation film with a double-layer structure and a thickness of 60 μm. The wide-band phase difference compensation film of the circular polarizer was then attached to the touch layer, and an anti-reflection layer was set on the circular polarizer to obtain Example 6.

Claims

1. An OLED display panel, characterized in that, The OLED display panel comprises a substrate (1), a buffer light-absorbing layer, a light filter layer (4), an anode (5), a light-emitting layer (6), a cathode (7), a light extraction layer (8), an encapsulation layer (9), a touch layer (10), a circular polarizer (12), an anti-reflection layer (13), and a brightness enhancement film (11) arranged between the light-emitting layer (6) and the circular polarizer (12). The light-emitting layer (6) is divided into a red sub-pixel area (61), a green sub-pixel area (62) and a blue sub-pixel area (63) along a direction parallel to the substrate, and an organic diaphragm is arranged between adjacent sub-pixel areas; the light filter layer (4) is composed of a one-dimensional photonic crystal, and the light filter layer (4) is divided into a red light filter area (41), a green light filter area (42) and a blue light filter area (43) along a direction parallel to the substrate, the red light filter area (41) corresponds to the position of the red sub-pixel area (61), the green light filter area (42) corresponds to the position of the green sub-pixel area (62), and the blue light filter area (43) corresponds to the position of the blue sub-pixel area (63). The buffer light-absorbing layer is made by arranging a light-absorbing layer (3) on the buffer layer (2) or uniformly doping a light-absorbing material in the buffer layer (2). The organic diaphragm is a light-absorbing material. The light filter layer (4) is arranged between the buffer light-absorbing layer and the anode (5), and forms an optical microcavity structure with the cathode (7). 2.The OLED display panel of claim 1, wherein, The circular polarizer (12) comprises a wide-waveband phase difference compensation film (121) and a linear polarizer (122) arranged in layers. 3.The OLED display panel of claim 2, wherein, The wide-waveband phase difference compensation film (121) is a liquid crystal coating type phase difference compensation film with a thickness of 0.1-10 μm or an extension type phase difference compensation film with a thickness of 15-60 μm. 4.The OLED display panel of claim 2, wherein, The Re(550) of the wide-waveband phase difference compensation film (121) is 80-190 nm, and the Re(450) / Re(550) is 0.7-0.9 and the Re(650) / Re(550) is 1.1-1.

4. 5.The OLED display panel of any one of claims 1-4, wherein, The light-absorbing layer (3) is made of a black material, a copper-zinc-tin-sulfur-selenium compound or a copper-indium-gallium-sulfur-selenium compound that can absorb ambient light; the light-absorbing material is one or more of carbon nanotubes, nickel-iron alloy and benzothiophene chemicals, and the particle size of the light-absorbing material is less than 1 / 3 of the thickness of the buffer layer. 6.The OLED display panel of any one of claims 1-4, wherein, The brightness enhancement film (11) is a thin film made of a chiral nematic liquid crystal or a cholesteric polymer liquid crystal, the thickness of the brightness enhancement film (11) is 2-70 μm, and the reflection wave band of the brightness enhancement film (11) contains all the light-emitting wave bands of the light-emitting layer (6). 7.The OLED display panel of any one of claims 1-4, wherein, The anode (5) is a thin film made of a transparent conductive oxide. 8.The OLED display panel of any one of claims 1-4, wherein, The anti-reflection layer (13) is a wide-waveband AR anti-reflection layer.

9. An OLED display, characterized in that, The OLED display panel comprises a substrate (1), a buffer light-absorbing layer, a light filter layer (4), an anode (5), a light-emitting layer (6), a cathode (7), a light extraction layer (8), an encapsulation layer (9), a touch layer (10), a circular polarizer (12), an anti-reflection layer (13), and a brightness enhancement film (11) arranged between the light-emitting layer (6) and the circular polarizer (12).

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