Display panel, preparation method and display device

Abstract

The application relates to the technical field of fingerprint identification devices, and provides a display panel and a preparation method thereof, and a display device. The display panel comprises a substrate, a light conversion layer located on one side of the substrate, and a plurality of light emitting units. The plurality of light emitting units are arranged at intervals. The light conversion layer is located between at least two adjacent light emitting units. The orthographic projection of the light conversion layer on the substrate does not overlap with the orthographic projection of the light emitting units on the substrate. The light conversion layer is used for converting first wavelength light into second wavelength light. The sensitivity of the second wavelength light sensed by an image sensor is higher than the sensitivity of the first wavelength light sensed by the image sensor. The display panel, the preparation method thereof, and the display device solve the technical problems of low FOD fingerprint identification sensitivity and poor reliability in the prior art.

Description

Technical Field

[0001] This invention belongs to the field of fingerprint recognition device technology, and more specifically, relates to a display panel and its preparation method, and a display device. Background Technology

[0002] Fingerprint on display (FOD) technology enables under-display fingerprint recognition, effectively ensuring the privacy and security of the display, and is an emerging feature of smartphone displays.

[0003] Most existing fingerprint recognition devices (FODs) are optical fingerprint recognition systems. When a finger is placed on the fingerprint recognition area, an internal light source shines light onto the finger. The light is reflected by the finger and then collected by the image sensor, which finally collects the signal to obtain a fingerprint image.

[0004] Current optical fingerprint recognition on smartphone displays suffers from low sensitivity and poor reliability. Summary of the Invention

[0005] The purpose of this invention is to provide a display panel and its manufacturing method, as well as a display device, to solve the technical problems of low sensitivity and poor reliability of FOD fingerprint recognition in the prior art.

[0006] To achieve the above objectives, the technical solution adopted by the present invention is as follows: The first aspect of the present invention provides a display panel, including a substrate;

[0007] A light conversion layer and a plurality of light-emitting units are located on one side of the substrate. The plurality of light-emitting units are spaced apart. The light conversion layer is located between at least two adjacent light-emitting units, and the orthographic projection of the light conversion layer on the substrate does not overlap with the orthographic projection of the light-emitting unit on the substrate. The light conversion layer is used to convert a first wavelength light into a second wavelength light. The second wavelength light is sensed by an image sensor with a higher sensitivity than the first wavelength light is sensed by the image sensor.

[0008] In one embodiment, the system further includes: a pixel definition layer located on the substrate, wherein a plurality of openings are provided on the side of the pixel definition layer away from the substrate, and the light-emitting unit is located within the openings; the light conversion layer is located on the side of the pixel definition layer away from the substrate and between two adjacent openings; and / or, both the light-emitting unit and the light conversion layer are located within the openings.

[0009] In one embodiment, the light conversion layer comprises a quantum dot material.

[0010] In one embodiment, the quantum dot material is a perovskite quantum dot material.

[0011] In one embodiment, the thickness of the light conversion layer is the same as the thickness of the light-emitting unit, and the thickness is the thickness in a direction perpendicular to the substrate.

[0012] In one embodiment, the light-emitting unit includes at least a red light-emitting unit, a blue light-emitting unit, and a green light-emitting unit, wherein the second wavelength light is green light, the first wavelength light is blue light, and the light conversion layer is used to convert blue light into green light.

[0013] In one embodiment, the light-emitting unit includes at least a red light-emitting unit, a blue light-emitting unit, and a green light-emitting unit, wherein the second wavelength light is green light, the first wavelength light is red light, and the light conversion layer is used to convert red light into green light.

[0014] A second aspect of the present invention provides a display device, comprising: an image sensor, a display panel located on the image sensor as described above, and a touch panel located on the side of the display panel away from the image sensor; the display panel is configured to emit light of a first wavelength and convert the first wavelength light reflected back via a fingerprint on the touch panel into light of a second wavelength.

[0015] A third aspect of the present invention provides a method for manufacturing a display panel, comprising: providing a substrate; forming a light conversion layer and a plurality of light-emitting units on one side of the substrate, wherein the plurality of light-emitting units are spaced apart, the light conversion layer is located between at least two adjacent light-emitting units, and the orthographic projection of the light conversion layer on the substrate does not overlap with the orthographic projection of the light-emitting unit on the substrate, the light conversion layer being used to convert a first wavelength light into a second wavelength light, wherein the second wavelength light is sensed by an image sensor with a higher sensitivity than the first wavelength light is sensed by the image sensor.

[0016] In one embodiment, forming a light conversion layer and a plurality of light-emitting units on one side of the substrate includes: forming a pixel definition layer on the substrate; forming a plurality of openings on the pixel definition layer away from the substrate; forming the light-emitting units within the openings; and forming a light conversion layer on the pixel definition layer away from the substrate, the light conversion layer being located between two adjacent openings.

[0017] The display panel provided by this invention includes a substrate, a light conversion layer located on one side of the substrate, and a plurality of light-emitting units. The plurality of light-emitting units are spaced apart, and the light conversion layer is located between at least two adjacent light-emitting units. The orthographic projection of the light conversion layer onto the substrate does not overlap with the orthographic projection of the light-emitting unit onto the substrate. The light conversion layer is used to convert a first wavelength of light into a second wavelength of light, wherein the second wavelength of light is more sensitive to being sensed by an image sensor than the first wavelength of light. When this display panel is applied to fingerprint recognition technology, it can convert the first wavelength of light reflected from the fingerprint onto the image sensor into the second wavelength of light through the light conversion layer, thereby increasing the sensitivity of the image sensor and improving the fingerprint recognition efficiency and security reliability of the display panel.

[0018] The display device provided by the present invention includes an image sensor, the aforementioned display panel, and a touch panel located on the side of the display panel away from the image sensor. The display panel is used to emit light of a first wavelength and convert the first wavelength light reflected back from the fingerprint on the touch panel into light of a second wavelength. When the fingerprint is recognized, the display device converts the first wavelength light reflected from the fingerprint onto the image sensor into light of a second wavelength through a light conversion layer, thereby increasing the sensitivity of the image sensor and improving the fingerprint recognition efficiency and security and reliability. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a partial structural diagram of the display panel during use, provided in an embodiment of the present invention.

[0021] Figure 2 A schematic diagram of the wavelength of light after the first wavelength light is converted into the second wavelength light, provided for an embodiment of the present invention;

[0022] Figure 3 This is a schematic diagram of the structure of the substrate and pixel definition layer in the display panel provided in an embodiment of the present invention;

[0023] Figure 4 This is a schematic diagram of the light-emitting unit and light conversion layer structure in a display panel provided in an embodiment of the present invention;

[0024] Figure 5 This is a schematic diagram of the light-emitting unit and light conversion layer structure in a display panel provided in an embodiment of the present invention;

[0025] Figure 6 This is a schematic diagram of the display panel manufacturing method provided in an embodiment of the present invention;

[0026] Figure 7 This is a schematic diagram of the display panel manufacturing method provided in an embodiment of the present invention;

[0027] Figure 8 This is a schematic diagram of the display panel manufacturing method provided in an embodiment of the present invention.

[0028] The following are the labeling elements in the figure:

[0029] 1-Substrate;

[0030] 2-Light-emitting unit;

[0031] 3-Light conversion layer;

[0032] 4-Image sensor;

[0033] 5-fingerprint;

[0034] 6-pixel definition layer;

[0035] 7-Touch panel;

[0036] 61 - Opening. Detailed Implementation

[0037] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0038] In the description of this invention, it should be understood that the terms “comprising” and “having” as used herein, and any variations thereof, are intended to cover non-exclusive inclusion, for example, a process, method, system, product, or device that includes a series of steps or units is not necessarily limited to those steps or units that are explicitly listed, but may include other steps or units that are not explicitly listed or that are inherent to such process, method, product, or device.

[0039] Furthermore, in this application, unless otherwise expressly specified and limited, the terms "connection," "linking," "fixing," "installation," etc., should be interpreted broadly. For example, they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; they can refer to the internal connection of two components or the interaction between two components. Unless otherwise expressly limited, those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0040] It should be understood that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention.

[0041] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. It should be understood that the term "and / or" as used herein is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone.

[0042] In the mobile phone panel industry, FOD (Follable Disk Optical) technology enables under-display fingerprint recognition, effectively ensuring the privacy and security of mobile phones. Currently, the mainstream FOD technology for mobile phones adopts a full-screen design and is primarily optical fingerprint recognition. Its principle is that when a finger is pressed into the fingerprint recognition area, a light source inside the screen shines light onto the finger. After reflection from the finger, the light converges to the image sensor, which then collects the signal to obtain the fingerprint image. In existing fingerprint recognition displays, the fingerprint to be recognized in the fingerprint recognition area is reflected by RGB light of different wavelengths onto the image sensor (CCD image sensor). The image sensor receives the signal. The inventors discovered that the sensitivity of the image sensor is related to the wavelength of the emitted light. The quantum efficiency of the image sensor at 450nm for blue light emitted by RGB pixels is 70%, while the quantum efficiency at 520nm for green light exceeds 80%. The image sensor has higher sensitivity to green light, therefore, the low blue light transmittance in the FOD area causes the image sensor to fail to detect it, resulting in poor reliability of FOD fingerprint recognition. This invention addresses these problems by proposing a display panel, its manufacturing method, and a display device.

[0043] The display panel, the method for preparing the display panel, and the display device provided by the present invention will be described in detail below with reference to specific embodiments.

[0044] Figure 1 This is a partial structural diagram of the display panel provided in an embodiment of the present invention. Figure 2 For a schematic diagram of the wavelength of light after conversion from the first wavelength to the second wavelength provided in an embodiment of the present invention, please refer to [link / reference needed]. Figure 1 and Figure 2 The first aspect of this embodiment provides a display panel, which includes a substrate 1, a light conversion layer 3 located on one side of the substrate 1, and a plurality of light-emitting units 2. The plurality of light-emitting units 2 are arranged at intervals. The light conversion layer 3 is located between at least two adjacent light-emitting units 2. The orthographic projection of the light conversion layer 3 on the substrate 1 does not overlap with the orthographic projection of the light-emitting unit 2 on the substrate 1. The light conversion layer 3 is used to convert a first wavelength light A into a second wavelength light B, wherein the second wavelength light B is sensed by an image sensor 4 with a higher sensitivity than the first wavelength light A is sensed by the image sensor 4.

[0045] The display panel in this embodiment is applied to a display screen that uses FOD technology for unlocking. The display panel in this embodiment can be applied to mobile phones and tablets. This embodiment does not impose any special limitations on the specific application scenarios of the display panel, nor does it impose any special limitations on the size of the display panel.

[0046] This embodiment does not impose any particular restrictions on the specific form of the light-emitting unit 2. For example, the light-emitting unit in this embodiment can be an RGB light-emitting unit. The light conversion layer 3 in this embodiment is located between at least two adjacent light-emitting units 2. This embodiment does not impose any particular restrictions on the specific position and area of ​​the light conversion layer 3.

[0047] In this embodiment, when the display panel is used for fingerprint recognition, the light conversion layer 3 converts the first wavelength light A reflected from the fingerprint 5 into a second wavelength light B. Since the second wavelength light B is sensed by the image sensor 4 with higher sensitivity than the first wavelength light A, the sensing sensitivity of the image sensor 4 is improved, thereby enhancing the under-display fingerprint detection efficiency. The wavelengths of the first wavelength light A and the second wavelength light B in this embodiment are related to the sensing sensitivity of the image sensor 4; however, this embodiment does not impose any particular limitation on the specific wavelengths of the first wavelength light A and the second wavelength light B.

[0048] The display panel provided in this embodiment includes a substrate 1, a light conversion layer 3 located on one side of the substrate 1, and a plurality of light-emitting units 2. The plurality of light-emitting units 2 are arranged at intervals, and the light conversion layer 3 is located between at least two adjacent light-emitting units 2. The orthographic projection of the light conversion layer 3 on the substrate 1 does not overlap with the orthographic projection of the light-emitting unit 2 on the substrate 1. The light conversion layer 3 is used to convert a first wavelength light A into a second wavelength light B, wherein the second wavelength light B is sensed by the image sensor 4 with higher sensitivity than the first wavelength light A is sensed by the image sensor 4. When this display panel is applied to fingerprint recognition technology, it can convert the first wavelength light A reflected from the fingerprint onto the image sensor 4 into the second wavelength light B through the light conversion layer 3, thereby increasing the sensitivity of the image sensor 4 and improving the fingerprint recognition efficiency and security reliability of the display panel.

[0049] Figure 3 For a schematic diagram of the substrate and pixel definition layer in the display panel provided in an embodiment of the present invention, please refer to [link / reference]. Figure 1 and Figure 3 In one specific embodiment, the display panel further includes a pixel definition layer 6 located on the substrate 1. The pixel definition layer 6 has a plurality of openings 61 on the side away from the substrate 1, and the light-emitting unit 2 is located in the openings 61. Figure 4 For a schematic diagram of the light-emitting unit and light conversion layer structure in the display panel provided in an embodiment of the present invention, please refer to [link / reference]. Figure 4 The light conversion layer 3 is located on the side of the pixel definition layer 6 away from the substrate 1 and between two adjacent openings 61. In this embodiment, the light-emitting unit 2 and the light conversion layer 3 are disposed on different layers.

[0050] In another specific embodiment, Figure 5 For a schematic diagram of the light-emitting unit and light conversion layer structure in the display panel provided in an embodiment of the present invention, please refer to [link / reference]. Figure 5 Both the light-emitting unit 2 and the light conversion layer 3 are located inside the opening 61. In this embodiment, the light-emitting unit 2 and the light conversion layer 3 are arranged on the same layer.

[0051] In practical applications, the light-emitting unit 2 and the light conversion layer 3 can be located in the same layer or different layers, or a part of the light conversion layer 3 and the light-emitting unit 2 can be located in the same layer, and another part of the light conversion layer 3 and the light-emitting unit 2 can be located in different layers.

[0052] Furthermore, the light conversion layer 3 comprises quantum dot material. Quantum dot material is an extremely small inorganic liquid nanocrystal composed of a finite number of atoms, with dimensions in all three dimensions on the nanometer scale. It is generally spherical or near-spherical, with a stable diameter of 2–10 nm. In this embodiment, the light conversion layer 3 uses quantum dot material to convert the first wavelength light A into the second wavelength light B. The second wavelength light B is sensed by the image sensor 4 with higher sensitivity than the first wavelength light A. This embodiment does not impose any particular limitation on the specific material of the quantum dot material. Preferably, the quantum dot material in this embodiment is perovskite quantum dot material. In this embodiment, when the quantum dot material is perovskite quantum dot material, the thickness of the light conversion layer 3 can be 5–20 nm.

[0053] In one specific embodiment, the thickness of the light conversion layer 3 is the same as the thickness of the light-emitting unit 2, which is the thickness along the direction perpendicular to the substrate 1. Optionally, when both the light conversion layer 3 and the light-emitting unit 2 are located within the opening 61, that is, when the light conversion layer 3 and the light-emitting unit 2 are disposed in the same layer, the thickness of the light conversion layer 3 can be set to be the same as the thickness of the light-emitting unit 2, which facilitates the subsequent fabrication of the film layer. The thickness of the light conversion layer 3 in this embodiment depends on the specific material of the quantum dot material, and this embodiment does not impose any particular limitation on the thickness of the light conversion layer 3 in other embodiments.

[0054] In one specific embodiment, please refer to Figure 1 and Figure 2 The light-emitting unit 2 is an RGB light-emitting unit, including a red light-emitting unit, a blue light-emitting unit, and a green light-emitting unit. The second wavelength light B is green light, and the first wavelength light A is blue light. The light conversion layer 3 is used to convert blue light into green light. In this embodiment, the quantum dot material of the light conversion layer 3 is perovskite quantum dot material. When the image sensor 4 is a CCD image sensor, the quantum efficiency of the CCD image sensor at 450nm for blue light is 70%, and the quantum efficiency at 520nm for green light exceeds 80%. In this embodiment, the blue light emitted by the blue light-emitting unit is reflected by the fingerprint on the display panel and then converted into green light by the perovskite quantum dot material, which improves the efficiency of the CCD image sensor in sensing blue light by 10%. This greatly improves the sensitivity of the CCD image sensor and also improves the anti-counterfeiting reliability of the under-display fingerprint technology by 10%. Because the detection efficiency of the image sensor 4 is improved, the current corresponding to the driving unit driving the blue light-emitting unit will also decrease, thereby reducing the power consumption of the fingerprint recognition screen and extending the life of the display panel to a certain extent.

[0055] In one specific embodiment, the light-emitting unit 2 is an RGB light-emitting unit, which includes a red light-emitting unit, a blue light-emitting unit, and a green light-emitting unit. The second wavelength light is green light, and the first wavelength light is red light. The light conversion layer 3 is used to convert the red light into green light. When the display panel in this embodiment is used for fingerprint recognition, the red light emitted by the red light-emitting unit is reflected by the fingerprint on the display panel and then converted into green light by the light conversion layer 3. This improves the efficiency of the image sensor 4 in sensing red light and enhances the sensitivity of the image sensor 4.

[0056] The display panel provided in this embodiment of the invention includes a substrate 1, a light conversion layer 3 located on one side of the substrate 1, and a plurality of light-emitting units 2. The plurality of light-emitting units 2 are arranged at intervals, and the light conversion layer 3 is located between at least two adjacent light-emitting units 2. The orthographic projection of the light conversion layer 3 on the substrate 1 does not overlap with the orthographic projection of the light-emitting unit 2 on the substrate 1. The light conversion layer 3 is used to convert a first wavelength light A into a second wavelength light B, wherein the second wavelength light B is sensed by an image sensor 4 with higher sensitivity than the first wavelength light A is sensed by the image sensor 4. When this display panel is applied to fingerprint recognition technology, it can convert the first wavelength light A reflected from the fingerprint onto the image sensor 4 into the second wavelength light B through the light conversion layer 3, thereby increasing the sensitivity of the image sensor 4 and improving the fingerprint recognition efficiency and security reliability of the display panel.

[0057] Please see Figure 1 and Figure 2 A second aspect of this embodiment provides a display device including an image sensor 4, a display panel located on the image sensor 4, and a touch panel 7 located on the side of the display panel away from the image sensor 4. The display panel is used to emit a first wavelength light A and convert the first wavelength light A reflected back by a fingerprint on the touch panel 7 into a second wavelength light B. In this embodiment, an encapsulation layer is also provided on the light-emitting unit and the light conversion layer, and the touch panel 7 is located on the encapsulation layer (not shown in the figure).

[0058] The display panel includes a substrate 1, a light conversion layer 3 located on one side of the substrate 1, and a plurality of light-emitting units 2. The plurality of light-emitting units 2 are spaced apart. The light conversion layer 3 is located between at least two adjacent light-emitting units 2. The orthographic projection of the light conversion layer 3 on the substrate 1 does not overlap with the orthographic projection of the light-emitting unit 2 on the substrate 1. The light conversion layer 3 is used to convert a first wavelength light A into a second wavelength light B. The second wavelength light B is sensed by the image sensor 4 with a higher sensitivity than the first wavelength light A is sensed by the image sensor 4.

[0059] The display device provided in this embodiment of the invention includes an image sensor 4, a display panel as described in the above embodiment, and a touch panel located on the side of the display panel away from the image sensor. The display panel is used to emit a first wavelength light A and convert the first wavelength light A reflected back from the fingerprint on the touch panel into a second wavelength light B. When the fingerprint is recognized, the display device converts the first wavelength light A reflected from the fingerprint onto the image sensor into the second wavelength light B through the light conversion layer 3, thereby increasing the sensitivity of the image sensor 4 and improving the fingerprint recognition efficiency and the security and reliability of fingerprint recognition.

[0060] Figure 6 Please refer to the schematic diagram of the display panel manufacturing method provided in the embodiment of the present invention. Figure 6 The third aspect of this embodiment provides a method for manufacturing a display panel, characterized in that it includes:

[0061] S101, Provide a substrate.

[0062] S102. A light conversion layer and multiple light-emitting units are formed on one side of the substrate.

[0063] Specifically, the light-emitting units can be red light-emitting units, blue light-emitting units and green light-emitting units arranged at intervals, and the orthographic projection of the light conversion layer on the substrate does not overlap with the orthographic projection of the light-emitting units on the substrate. The light conversion layer is used to convert the first wavelength light into the second wavelength light, wherein the sensitivity of the second wavelength light to be sensed by the image sensor is higher than the sensitivity of the first wavelength light to be sensed by the image sensor.

[0064] Specifically, in this embodiment, the light conversion layer is located between at least two adjacent light-emitting units. This embodiment does not impose any particular limitation on the specific area of ​​the light conversion layer. The orthographic projection of the light conversion layer onto the substrate does not overlap with the orthographic projection of the light-emitting unit onto the substrate; that is, the light conversion layer does not cover the light-emitting unit. This embodiment does not impose any particular limitation on the specific wavelengths of the first and second wavelengths of light. The sensitivity of the image sensor to the second wavelength light is higher than that to the first wavelength light.

[0065] Figure 7 Please refer to the schematic diagram of the display panel manufacturing method provided in the embodiment of the present invention. Figure 7 In one specific embodiment, a light conversion layer and a plurality of light-emitting units are formed on one side of the substrate, including:

[0066] S1021. A pixel definition layer is formed on the substrate;

[0067] S1022, Multiple openings are formed on the side of the pixel definition layer away from the substrate;

[0068] S1023. A light-emitting unit is formed inside the opening;

[0069] S1024. A light conversion layer is formed on the side of the pixel definition layer away from the substrate, and the light conversion layer is located between two adjacent openings.

[0070] In this embodiment, the light-emitting unit is located inside the opening of the pixel definition layer, and the light conversion layer is located between the openings of two adjacent pixel definition layers. The light conversion layer is formed in a simple way in the display panel manufacturing method of this embodiment, and the light-emitting unit and the light conversion layer are set in different layers in this embodiment.

[0071] Figure 8 Please refer to the schematic diagram of the display panel manufacturing method provided in the embodiment of the present invention. Figure 8 In another specific embodiment, a light conversion layer and a plurality of light-emitting units are formed on one side of the substrate, including:

[0072] S1031. A pixel definition layer is formed on the substrate;

[0073] S1032, Multiple openings are formed on the side of the pixel definition layer away from the substrate;

[0074] S1033, A light-emitting unit and a light conversion layer are formed inside the opening.

[0075] In this embodiment, the light-emitting unit and the light conversion layer are arranged on the same layer.

[0076] The steps of the various methods described above are only for clarity. In practice, they can be combined into one step or some steps can be split into multiple steps. As long as they include the same logical relationship, they are all within the scope of protection of this patent.

[0077] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A display panel, characterized in that, include: substrate; A light conversion layer and a plurality of light-emitting units are located on one side of the substrate. The plurality of light-emitting units are spaced apart. The light conversion layer is located between at least two adjacent light-emitting units, and the orthographic projection of the light conversion layer on the substrate does not overlap with the orthographic projection of the light-emitting unit on the substrate. The light conversion layer is used to convert a first wavelength light into a second wavelength light. Wherein, the sensitivity of the second wavelength light to be sensed by the image sensor is higher than that of the first wavelength light to be sensed by the image sensor; It also includes a pixel definition layer located on the substrate, with multiple openings on the side of the pixel definition layer away from the substrate, and the light-emitting unit located in the openings; The light conversion layer and the light-emitting unit are located in the same opening, and the light conversion layer and the light-emitting unit are set in the same layer.

2. The display panel according to claim 1, characterized in that, The light conversion layer contains quantum dot materials.

3. The display panel according to claim 2, characterized in that, The quantum dot material is a perovskite quantum dot material.

4. The display panel according to claim 1, characterized in that, The thickness of the light conversion layer is the same as the thickness of the light-emitting unit, and the thickness is the thickness along the direction perpendicular to the substrate.

5. The display panel according to any one of claims 1-4, characterized in that, The light-emitting unit includes at least a red light-emitting unit, a blue light-emitting unit, and a green light-emitting unit. The second wavelength light is green light, the first wavelength light is blue light, and the light conversion layer is used to convert blue light into green light.

6. The display panel according to any one of claims 1-4, characterized in that, The light-emitting unit includes at least a red light-emitting unit, a blue light-emitting unit, and a green light-emitting unit. The second wavelength light is green light, the first wavelength light is red light, and the light conversion layer is used to convert red light into green light.

7. A display device, characterized in that, include: An image sensor, a display panel located on the image sensor as described in any one of claims 1-6, and a touch panel located on the side of the display panel away from the image sensor; The display panel is used to emit the first wavelength light and convert the first wavelength light reflected back from the fingerprint on the touch panel into the second wavelength light.

8. A method for manufacturing a display panel, characterized in that, include: Provide a substrate; A light conversion layer and a plurality of light-emitting units are formed on one side of the substrate, wherein the plurality of light-emitting units are spaced apart, the light conversion layer is located between at least two adjacent light-emitting units, and the orthographic projection of the light conversion layer on the substrate does not overlap with the orthographic projection of the light-emitting unit on the substrate. The light conversion layer is used to convert a first wavelength light into a second wavelength light, and the second wavelength light is sensed by the image sensor with a higher sensitivity than the first wavelength light is sensed by the image sensor.

9. The method for manufacturing a display panel according to claim 8, characterized in that, The light conversion layer and multiple light-emitting units are formed on one side of the substrate, including: A pixel definition layer is formed on the substrate; Multiple openings are formed on the side of the pixel definition layer away from the substrate; The light-emitting unit is formed within the opening; A light conversion layer is formed on the side of the pixel definition layer away from the substrate, and the light conversion layer is located between two adjacent openings.

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